Showing papers on "Portal frame published in 2018"
TL;DR: In this article, the use of small diameter whole-culm (bars) and split bamboo (a.k.a. splints or round strips) has been proposed as an alternative to relatively expensive reinforcing steel in reinforced concrete.
Abstract: The use of small diameter whole-culm (bars) and/or split bamboo (a.k.a. splints or round strips) has often been proposed as an alternative to relatively expensive reinforcing steel in reinforced concrete. The motivation for such replacement is typically cost—bamboo is readily available in many tropical and sub-tropical locations, whereas steel reinforcement is relatively more expensive—and more recently, the drive to find more sustainable alternatives in the construction industry. This review addresses such ‘bamboo-reinforced concrete’ and assesses its structural and environmental performance as an alternative to steel reinforced concrete. A prototype three bay portal frame, that would not be uncommon in regions of the world where bamboo-reinforced concrete may be considered, is used to illustrate bamboo reinforced concrete design and as a basis for a life cycle assessment of the same. The authors conclude that, although bamboo is a material with extraordinary mechanical properties, its use in bamboo-reinforced concrete is an ill-considered concept, having significant durability, strength and stiffness issues, and does not meet the environmentally friendly credentials often attributed to it.
74 citations
TL;DR: In this paper, a half-scale CFS moment-resisting portal frame was tested under static monotonic loading until failure, and the results showed that the proposed system can provide good seismic performance subjected to the appropriate design of the main structural elements, and a detailed finite element (FE) model was developed using ABAQUS by taking into account the material nonlinearity and geometrical imperfections.
49 citations
TL;DR: In this article, the authors present experimental investigations on the collapse behavior of a full-scale 36'm'×'12'm steel portal frame exposed to natural fires and show that the frame collapses after 15min fire exposure with a critical temperature of about 1100'°C in the heated column.
36 citations
TL;DR: The effect of soil-structure interaction on the dynamic response of, a portal frame railway bridge is identified and the accuracy of numerical models in this study is validated.
34 citations
TL;DR: In this article, the authors present experimental and numerical investigations on the collapse behavior of a 12'm'×'6'm steel portal frame exposed to fire and show that the fire compartment collapses after 20min heating with a critical column temperature of 850'°C.
26 citations
TL;DR: In this article, the authors presented the validation of a model for temperature simulation, to be used in future work in the determination of temperature differences between deck and abutments in portal frame bridges.
16 citations
TL;DR: In this article, the results of an investigation on the use of Generalized Beam Theory (GBT) to analyse the vibration behaviour of thin-walled steel frames are reported. And the application and capabilities of the proposed GBT-based finite element formulation, as well as numerical results concerning the local, distortional and global vibration behavior of (i) a symmetric portal frame and (ii) an L-shaped frame exhibiting four commonly used joint configurations are presented and discussed.
Abstract: This paper reports the results of an investigation on the use of Generalised Beam Theory (GBT) to analyse the vibration behaviour of thin-walled steel frames. After an overview of the main concepts and procedures involved in performing a GBT vibration analysis, the formulation and implementation of a GBT-based beam finite element are presented, namely the determination of the finite element and frame linear stiffness and mass matrices (incorporating the influence frame joint configurations). Finally, in order to illustrate the application and capabilities of the proposed GBT-based finite element formulation, numerical results concerning the local, distortional and global vibration behaviour of (i) a symmetric portal frame and (ii) an “L-shaped” frame exhibiting four commonly used joint configurations are presented and discussed. For validation purposes, some GBT results (frequency values and vibration mode shapes) are compared with values yielded by A nsys shell finite element analyses .
15 citations
TL;DR: In this article, a mixed-integer linear programming (MILP) approach is used to solve the discrete sizing optimization problem of frame structures using profile catalogs, where the internal forces of the members are taken as continuous state variables and the displacement and stress constraints are formulated such that for each member limit values can be imposed at predefined locations along the member.
Abstract: This paper focuses on discrete sizing optimization of frame structures using commercial profile catalogs. The optimization problem is formulated as a mixed-integer linear programming (MILP) problem by including the equations of structural analysis as constraints. The internal forces of the members are taken as continuous state variables. Binary variables are used for choosing the member profiles from a catalog. Both the displacement and stress constraints are formulated such that for each member limit values can be imposed at predefined locations along the member. A valuable feature of the formulation, lacking in most contemporary approaches, is that global optimality of the solution is guaranteed by solving the MILP using branch-and-bound techniques. The method is applied to three design problems: a portal frame, a two-story frame with three load cases and a multiple-bay multiple-story frame. Performance profiles are determined to compare the MILP reformulation method with a genetic algorithm.
14 citations
TL;DR: This work presents a passive control strategy using a pendulum on a simple portal frame structure, with two-to-one internal resonance, with a piezoelectric material coupling as a means of energy harvesting, and shows that the system presents, most of the time, as being quasiperiodic.
Abstract: This work presents a passive control strategy using a pendulum on a simple portal frame structure, with two-to-one internal resonance, with a piezoelectric material coupling as a means of energy ha...
12 citations
TL;DR: The formulas were derived in terms of the internal force and the lateral stiffness, and the influence of the semi-rigid connections was discussed, and a calculation flowchart of the lateral performance on a semi- Rigid frame was presented to verify the derived formulas and to show a framework of theateral structural design process.
Abstract: Semi-rigidness of the joint connections is one of the main characteristics of timber structures. The pin-joint assumption for the semi-rigid joint connections might be not conservative in the timber structural design. In this paper, structural analysis was conducted on a semi-rigid timber portal frame; the formulas were derived in terms of the internal force and the lateral stiffness, and the influence of the semi-rigid connections was discussed. Moreover, experimental tests were performed on three full-scale timber portal frames and five bolted timber connections to study the lateral performance of the frames and the moment resistance of the connections. For consistency, the connections from the portal frames and the connections for bending tests were of the same configuration. Finally, a calculation flowchart of the lateral performance on a semi-rigid frame was presented to verify the derived formulas and to show a framework of the lateral structural design process.
12 citations
TL;DR: In this article, the authors present quantitative investigations on the collapse behavior of steel portal frames exposed to standard fires, and the complete collapse process is divided into safe, alert, dangerous and collapse stages.
TL;DR: The aims of the full-scale tests were to refine the stressed skin design method and to adjust it to the nonstandard cladding structural system applied by an industrial partner, and the results derived from the ECCS formulae were introduced.
Abstract: Previous studies on stressed skin effect of industrial steel buildings showed discrepancies between the ECCS formulae and experimental results. To clarify the discrepancies full-scale experimental test program was planned and executed by the Budapest University of Technology and Economics, Department of Structural Engineering. The aims of the full-scale tests were to refine the stressed skin design method and to adjust it to the nonstandard cladding structural system applied by an industrial partner. During execution of the full-scale experiments the shear flexibility of those industrially applied nonstandard diaphragms were examined, where the application of seam fasteners were rejected. Next to the building section a loading frame was built, so that tension and compression force could be applied to each frame, in order to examine the in-plane shear flexibility of the whole nonstandard diaphragm assembly, including the shear flexibility of the portal frame. In the test series four purlin and two trapezoidal sheeting height configurations were combined in more than 100 tests. This paper, denoted as Part I shows the test setup and introduces the results derived from the ECCS formulae, underlining the importance of extending the applicability of the current design formulae to nonstandard cases, which are often applied in industrial practice all over Europe. A companion paper (Part II) presents the comparative results between the various cladding configurations, also the main conclusions regarding the stiffening effect of the applied diaphragm configurations, and reports the effect of change in section size to shear flexibility. Besides this in Part II the effect of different structural components in regards to shear flexibility is underlined.
TL;DR: In this article, an energy-based approach was proposed to calculate the buckling load of a column with an intermediate elastic torsional restraint, which was shown to predict buckling loads within 6% for columns with an adjustable knee brace.
Abstract: Cold-formed steel haunched portal frames are popular structures in industrial and housing applications. They are mostly used as sheds, garages, and shelters, and are common in rural areas. Cold-formed steel portal frames with spans of up to 30 m are now being constructed in Australia. As they are relatively new to the market, current design recommendations are fairly limited. In the specific frame system analyzed herein, the column is partially restrained against twist rotation at an intermediate point where the knee brace joining the column and rafter is connected. An experimental program was carried out on a series of portal frame systems composed of back-to-back channels for the columns and rafters. It was found that changing the knee brace and knee brace-to-column connection bracket significantly affected the buckling capacity of the column, however this was not captured in design calculations. In order to correctly predict frame behavior and ultimate loads for design purposes, the column buckling capacity must be accurately calculated. This paper presents an energy method approach to calculate the buckling load of a column with an intermediate elastic torsional restraint. Various end conditions of the column are considered including column base semi-rigidity, as well as multiple loading conditions. Displacement functions are determined based on measured experimental data. The Southwell and Meck plot methods to determine column buckling loads are discussed. The column buckling loads determined from the plot methods and calculated by the energy analysis are compared to the experimental column buckling loads. It is shown that the energy method outlined herein predicts the buckling load within 6% for columns with an intermediate elastic torsional restraint.
Patent•
24 Aug 2018
TL;DR: In this article, a method and device for cutting silicon core trimmings into the finished silicon core products are presented, which are high in working efficiency, small in loss, capable of reducing energy consumption and high in silicon rod utilization rate.
Abstract: The invention discloses a method and device for cutting silicon core trimmings into finished silicon core products. The device comprises a machine frame, a portal frame, a moving mechanism, a wire winding-unwinding mechanism and a clamping mechanism; the portal frame is installed on the machine frame through the moving mechanism and driven to do linear reciprocating motion on the machine frame; the portal frame is provided with a lifting part and a cutting head installed on the lifting part; the wire winding-unwinding mechanism is installed at one end of the machine frame and connected with the cutting head through a cutting wire; and the clamping mechanism is arranged on the machine frame. The method and device for cutting the silicon core trimmings into the finished silicon core productsare high in working efficiency, small in loss, capable of reducing energy consumption and high in silicon rod utilization rate.
TL;DR: In this paper, the inelastic drift demands including the peak drift and the residual drift for the prototype timber portal frame structural elements were evaluated and validated with the simulated results from nonlinear time-history analyses.
Abstract: Summary
As one key to the implementation of the performance-based design methodologies for wood structures, the performance objectives and their corresponding limit state criteria are usually correlated with the peak (maximum) interstory drift demands. This paper evaluates the inelastic drift demands including the peak drift and the residual drift for the prototype timber portal frame structural elements. Analytical 2D-framed model representative of the study-case were subjected to a suite of 50 pulse-type earthquake ground motions. In addition, an accumulated damage index is added to the inputs of the nonlinear analyses to account for the damage caused by the previous ground excitations. Larger accumulated damages lead to larger inelastic drifts. Strong correlation is revealed among the drift demands, the peak ground accelerations, and the variables characterizing the nonlinear system behavior. Finally, estimation formulas for the peak and residual drift demands are proposed and validated with the simulated results from nonlinear time-history analyses. Based on the presented formulas, the resilience ratio and the effective elastic drift are further derived to comprehend the nonlinear behavior of such timber made structures.
01 Jan 2018
TL;DR: In Sweden, the railway sector currently faces the challenge of developing its first high-speed railway line, in response to the need to provide faster domestic and international transport alternati ...
Abstract: In Sweden, the railway sector currently faces the challenge of developing its first high-speed railway line, in response to the need to provide faster domestic and international transport alternati ...
Patent•
03 Apr 2018
TL;DR: The utility model belongs to the technical field of product quality detecting equipment technique and specifically relates to off-line multifunctional mobile phone shell check out test set, including the frame, be equipped with marble platform in the frame and last two Y-axis track that parallel and the portal frame of being equipped with of marble platform as mentioned in this paper.
Abstract: The utility model belongs to the technical field of product quality detecting equipment technique and specifically relates to off -line multifunctional mobile phone shell check out test set, includingthe frame, be equipped with marble platform in the frame, last two Y -axis track that parallel and the portal frame of being equipped with of marble platform, the portal frame strides across Y -axistrack, is equipped with X axle track on the portal frame, article two, set up first tool and second tool on the Y -axis track, for a Y axle alternating movement form of advancing one between first tool and the second tool, the gallows is removed in the equipment on the X axle track on the portal frame, and the equipment has industry camera, light source base and laser displacement ware on the removal gallows, by this, wait the cell -phone shell that detects and place at first tool or second tool and remove the portal frame below that industry camera, light source base and laser displacement ware are followed and is removed gallows removal, industry camera adversary casing plane size detection, and the high size detection of laser displacement ware adversary's casing. Simple structure, scientific and reasonable uses and maintains portably, detection efficiency and precision are high.
15 Oct 2018
TL;DR: In this article, the nonlinear static pushover analyses of a reinforced concrete portal frame are obtained by using fiber element method based on displacement. But the results are evaluated with regard to the top displacement-base shear force and top rotation-base moment.
Abstract: In this study, the nonlinear static Pushover analyses of a reinforced concrete portal frame are obtained by using Fiber element method based on displacement. For calculating of cyclic behavior of concrete, the Mander-Priestley-Park model is used. Cyclic behavior of the reinforcement is obtained by using MengottoPinto steel model. Different longitudinal reinforcement ratios are selected for investigating effect on the nonlinear behavior of a portal frame under horizontal forces. Concrete mean strength is 20 MPa and confinement factor is 1.2. The yield strength of reinforcement model is 420 MPa. Obtained results are evaluated with regard to the top displacement-base shear force and top rotation-base moment. The lateral load capacities and the overturning moment capacities obtained from 2, 3, 4 and 5 cases were calculated more between 81-200% and 101-286% than 1 case, respectively. As a results, it is determined that the lateral load capacity and the overturning moment capacity increase depending on increasing of longitudinal reinforcement ratio in columns.
Patent•
27 Feb 2018
TL;DR: In this paper, a clamp device of a top cover laser welding station on a main welding line for a vehicle body in white is presented, which consists of a vertical column type portal frame and a gripper.
Abstract: The invention relates to a clamp device of a top cover laser welding station on a main welding line for a vehicle body in white. The clamp device comprises a vertical column type portal frame and a top cover gripper. The vertical column type portal frame comprises two column rows distributed on the two sides of a conveying channel of the vehicle body in white; each column row comprises a pluralityof portal vertical columns arranged sequentially at intervals in the conveying direction of the vehicle body in white; the top cover gripper comprises a gripper frame and a clamping mechanism used for compressing and limiting a top cover; the clamping mechanism is mounted on the gripper frame; and the gripper frame abuts against the top ends of the portal vertical columns and accordingly is horizontally supported on the portal vertical columns. Compared with an existing portal frame of the structure that steel frame beams are spliced longitudinally and transversely, by adopting the vertical column type portal frame, the practical function is guaranteed, meanwhile, the structure is greatly simplified, more station spaces are reserved, the welding reachability of a welding robot is optimized, and the welding production efficiency is effectively improved; and the passing ability of the vehicle body in white is improved greatly, and the same station can achieve laser welding of more and lager vehicle types.
01 Jan 2018
TL;DR: Three reinforced concrete portal frame designs are used to evaluate the probability of failure of the structural resistance determined with the safety formats and several comments are given on the difficulties of using those methods.
Abstract: In order to perform a reassessment of existing structures or design new structures in a more efficient and economical way non-linear finite element (NLFE) models are used to take into account all non-linear behavior in reinforced concrete structures. The Model Code 2010 (fib, 2012) suggest several safety formats to perform non-linear finite element analyses with an intended reliability index β_R=3.04. The safety formats seems to be safe for statically determinate structures with a predictable failure mode. For instance a bending failure in a simply supported reinforced concrete beam. However it is unclear if the intended safety level is met for statically indeterminate structures. Since the redundancy of the structural system and the several possibilities to redistribute the internal forces could lead to unpredictable failure modes. In this thesis three reinforced concrete portal frame designs are used to evaluate the probability of failure of the structural resistance determined with the safety formats i.e. the safety of the safety formats will be assessed. The ductility of the portal frame designs determines the degree of redistribution of the internal forces. Therefore this case study will focus on three portal frame designs with all a different ductile behavior. The global design resistance is determined according to the following safety formats: the global resistance factor method (GRFm), the estimation of a coefficient of variation (ECOV) method and the partial factor method (PFm). A comparison is made with the local design resistance of the portal frame designs according to the Eurocode 2 using partial safety factors. The reliability level of the structural design resistance according to the least conservative safety formats is determined for each portal frame design. Several response surfaces were constructed and the first order reliability method (FORM) was used to determine the reliability level. In case of relatively low material and geometrical uncertainties the safety formats lead to a structural resistance that can safely be used i.e. the intended reliability level is met. However when the detailing uncertainties in concrete frame corners are relatively large these uncertainties should be implemented in the safety formats. Further research and more experimental results are needed to make a better estimation of the (model) uncertainties possible. Finally, the used methods are evaluated and several comments are given on the difficulties of using those methods. Constructing a response surface in combination with the FORM in order to find the design point is definitely not an automated process as the mathematical procedures seems to indicate.
Patent•
11 May 2018
TL;DR: The utility model discloses a portable weather enclosure of utility tunnel construction usefulness, including telescopic steel truss and fixing the rain-proof tarpaulin at the truss top, and every group portal frame becomes by controlling two stands and top steel support, through the connection of mutual two connecting rods of articulated X-shaped of multiunit between the horizontal pole of adjacent top steelframe, and warp a set of mutual 2 connecting rods between the adjacent stand, all there is the cooperation of rolling the stand bottom at the gyro wheel of parallel mount on the rail on
Abstract: The utility model discloses a portable weather enclosure of utility tunnel construction usefulness, including telescopic steel truss and fixing the rain -proof tarpaulin at the steel truss top, telescopic steel truss includes the multiunit portal frame, and every group portal frame becomes by controlling two stands and top steel support, through the connection of mutual two connecting rods of articulated X -shaped of multiunit between the horizontal pole of adjacent top steelframe, and warp a set of mutual two connecting rods of articulated X -shaped connection at least between the adjacent stand, all there is the cooperation of rolling the stand bottom at the gyro wheel of parallel mount on the rail on piping lane foundation ditch both sides ground, and both ends even have and are used for going along with sb. To guard him to support with the piping lane foundation ditch going up predetermined fixed knot and constructing and set up the rope of usefulness in the stand upper end about at least. The antedisplacement of this portable weather enclosure of utility tunnel construction usefulness convenient laborsaving, can go along with sb. To guard him with the piping lane foundation ditch when meeting the strong wind and support firm in connection and can actually be used for utility tunnel to execute industrial area ground.
Patent•
16 Mar 2018
TL;DR: In this paper, the utility model relates to a return bend school circle and alignment frock, it includes portal frame (1), portal frame for falling of using that the welding of channel -section steel and steel sheet makes' L' type structure, one outrigger (1.2) that transversely stretch out including one support frame and support frame ( 1.1) top portal frame.
Abstract: The utility model relates to a return bend school circle and alignment frock, it includes portal frame (1), portal frame (1) for falling of using that the welding of channel -section steel and steel sheet makes' L' type structure, one outrigger (1.2) that transversely stretch out including one support frame (1.1) and support frame (1.1) top portal frame (1), be provided with hydraulic cylinder (2)on outrigger (1.2), the embedded adjustable tile (4) that presss from both sides is connected to hydraulic cylinder (2) decurrent flexible installation extension transition device (3) of serving, extension transition device (3) bottom, and embedded adjustable tile (4) the bottom that presss from both sides is provided with the spout, embedded adjustable double -layered tile (5) of inlaying the circular arc in tile (4) bottom that press from both sides, and pipe (6) bottom is supported by V type frame (7). The utility model discloses return bend school circle and alignment frock application scope is wide, has can further improve mouth of pipe quality and rectify a mouthful speed, reduces to building site field service, reduces manufacturing cost's advantage.
Patent•
02 Feb 2018
TL;DR: In this article, the authors proposed an electrodynamic type crisscross motion butt joint system which is characterized by comprising a conveying device, a lifting device, and a portal frame and a transferring frame.
Abstract: The invention relates to an electrodynamic type crisscross motion butt joint system which is characterized by comprising a conveying device, a lifting device, a portal frame and a transferring frame,wherein the conveying device and the lifting device are arranged on the portal frame; a sliding guide mechanism arranged at the bottom end of the portal frame is perpendicular to a sliding guide mechanism arranged at the bottom end of the transferring frame; and the motion directions of the portal frame and the transferring frame are mutually perpendicular. According to the electrodynamic type crisscross motion butt joint system, a drive motor is adopted to drive a conveyer belt to convey in the horizontal direction and the conveying efficiency is high; and in addition, the lifting device arranged on the portal frame can realize vertical displacement of the conveying device, and compared with the conveying mechanism capable of conveying displacement in the signal direction, the conveying efficiency is improved.
Patent•
13 Apr 2018
TL;DR: In this paper, an automatic box sealing machine, including frame, portal frame, truckle, electrically controlled device, cylinder drive mechanism, box conveyer belt, regulation guide arm,crossbeam, direction packaging mechanism, adjusting bolt, is described.
Abstract: The utility model discloses an automatic box sealing machine, including frame, portal frame, truckle, electrically controlled device, cylinder drive mechanism, box conveyer belt, regulation guide arm,crossbeam, direction packaging mechanism, adjusting bolt, the truckle is installed in the four corners of frame, and the frame top is located to the portal frame, and electrically controlled device locates in the frame, cylinder drive mechanism is connected at both ends around the frame, and the box conveyer belt is located the frame top and corresponds connects cylinder drive mechanism, adjust guide arm fixed mounting and be connected the width regulation in order to realize the box conveyer belt in the frame below and with the cooperation of box conveyer belt, crossbeam sliding connection portal frame passes through adjusting bolt and realizes the fixed of the upper and lower height of crossbeam, leads packaging mechanism fixed connection in the crossbeam below. This automatic box sealing machine can carry out the encapsulation of box top and bottom through the packing box encapsulation of the many sizes of width regulation adaptation simultaneously, has still set up and has spouteda yard device, once only accomplishes the encapsulation and spouts a yard operation, and packaging effects is good, effectively improves work production efficiency.
Patent•
27 Apr 2018
TL;DR: In this article, a lining construction method consisting of a lining trolley and a concrete pumping mechanism is proposed, where the trolley comprises a formwork system, a portal frame system and a walking mechanism.
Abstract: The invention provides a lining construction method. The lining construction method includes equipment of a lining trolley and a concrete pumping mechanism, wherein the lining trolley comprises a formwork system, a portal frame system and a walking mechanism. The lining construction method comprise the following steps that the walking mechanism drives the portal frame system to convey formwork system single pieces to a construction site; the portal frame system splits the formwork system single pieces; the concrete pumping mechanism conveys concrete into pouring gates or working windows of theformwork system single pieces for lining construction; after lining construction of the construction site is completed, the walking mechanism drives the portal frame system to convey the formwork system single pieces to a next construction site. During application of the lining construction method, the combination of the portal frame system and the walking mechanism can serve as a standard component, which can be combined with a number of sets of formwork systems simultaneously to achieve simultaneous construction of multiple sets of formwork system single pieces, thereby greatly improving the construction efficiency. The invention also provides the lining trolley. The lining trolley is concise in structure and small in the number of parts; the formwork system single pieces serve as majorload bearing parts and accordingly are less prone to deformation and shifting during a pouring process.
Patent•
11 May 2018
TL;DR: The utility model relates to a pet is portal frame for cleaning machine installs the quick-witted incasement portion at the pet cleaning machine, including the portal frame body, slide rail and drive arrangement as discussed by the authors.
Abstract: The utility model relates to a pet is portal frame for cleaning machine installs the quick -witted incasement portion at the pet cleaning machine, including the portal frame body, slide rail and drivearrangement, the portal frame body includes moving frame and the fixed removal seat that sets up on moving frame, it establishes on the slide rail with the gliding mode cover of slide rail relativelyto remove the seat, under drive arrangement's effect, it can guide moving frame to remove along the slide rail to remove the seat, moving frame is buckled by inside cavity formation accommodation space's flat board and forms, be provided with the air intake with the accommodation space intercommunication on moving frame's lateral surface, be provided with the air outlet with the accommodation space intercommunication on moving frame's medial surface, be provided with the raceway in moving frame's accommodation space, be provided with the water inlet pipe with the raceway intercommunication onmoving frame's lateral surface, be provided with hole for water spraying a plurality of and the raceway intercommunication on moving frame's medial surface. The utility model discloses can carry outall -round washing and stoving to the pet to carry out the high efficiency cleanness to the pet.
01 Jan 2018
TL;DR: In the field of structural dynamics, a broader knowledge about relevant phenomena that affect the dynamic behavior of railway bridges is vital for structural engineers and design code administrator to design code administrators to design and maintain railway bridges.
Abstract: In the field of structural dynamics, a broader knowledge about relevant phenomena that affect the dynamic behavior of railway bridges is vital for structural engineers and design code administrator ...
Patent•
15 May 2018
TL;DR: In this article, the utility model discloses an unwinding device of improvement type production fabric cutting machine for clothing, including two bases, portal frame, screw rod, adjustment disk, crossbeam, two connectors, two shelve the seat and unreel the axle.
Abstract: The utility model discloses an unwinding device of improvement type production fabric cutting machine for clothing, including two bases, portal frame, screw rod, adjustment disk, crossbeam, two connectors, two shelve the seat and unreel the axle, the lower extreme of two stands of portal frame is equipped with the base respectively, wear to be equipped with threaded connection's screw rod on the crossbeam body of portal frame, the upper end of screw rod is equipped with the adjustment disk, the lower extreme of screw rod is equipped with rotatable coupling's crossbeam, the both ends of crossbeam all are equipped with the connector, the stand sliding connections of connector and the portal frame that corresponds, the lower extreme of connector all is equipped with shelves the seat, it unreels the axle to shelve to have placed on the seat, unreel the axle and including axis body, two annular constant head tanks of circle and two overspeed device tensioner, compare with prior art, can simple structure, the yardage roll is fixed to be dismantled conveniently, and the good reliability reduces artifical intensity of labour, avoids the yardage roll to continue the rotation under inertialeffect and unreels the circumstances that leads to the fact the cloth to fall to the ground.
Patent•
09 Nov 2018
TL;DR: The utility model relates to a garment machinery technical field, in particular to fabric cutting machine for tailoring is fixed with first portal frame, second portal frame and unreels frame and backuppad group on the base, the diaxon head of compression roller rotates with two backup pads respectively to be connected, wiping roller's and rubbing head of rubbing rotated with the coexistence post off-irst portal frame respectively to connect, be provided with tension control mechanism on the first portalframe, be providing with the fabric cutting cylinder on the second portalframe and the other end is provided
Abstract: The utility model relates to a garment machinery technical field, in particular to fabric cutting machine for tailoring is fixed with first portal frame, second portal frame, unreels frame and backuppad group on the base, the diaxon head of compression roller rotates with two backup pads respectively to be connected, wiping roller's the diaxon head of rubbing rotates with the coexistence post offirst portal frame respectively to be connected, be provided with tension control mechanism on the first portal frame, be provided with the fabric cutting cylinder on the second portal frame, fabric cutting cylinder one end and second portal frame looks fixed connection, the fabric cutting cylinder other end is provided with the fabric cutting sword, the top surface of base is provided with two open slots that are parallel to each other, all be provided with clamping jaw pulling mechanism in the open slot Using the utility model discloses the time, through the tension of tension control mechanism controls cloth, make the cloth by exceptionally straight in this structure, through the automatic cloth of pulling out of clamping jaw pulling mechanism, very big limit ground improves fabric cutting's efficiency, reduces intensity of labour, improves the security of fabric cutting process
Patent•
03 Apr 2018
TL;DR: In this paper, a pneumatic tension doubling winder with dust removal function, including the portal frame, is described, which is open-ended hollow structure for both sides, symmetrical has four supports on the bottom inner wall of portal frame.
Abstract: The utility model discloses a pneumatic tension doubling winder with dust removal function, including the portal frame, the portal frame is open -ended hollow structure for both sides, symmetrical hasfour supports on the bottom inner wall of portal frame, lie in and install running roller with rotating between two supports of one side, common winding has the stranded silk thread on two running rollers, be equipped with fixed mounting first supporting shoe on the inner wall bottom the portal frame between two running rollers, slidable mounting has the guide post in the first supporting shoe, and the both ends of guide post all extend to outside the first supporting shoe, the welding had the second supporting shoe on one side bottom inner wall of first supporting shoe was kept away from tothe portal frame, one side welding that the second supporting shoe is close to the guide post has the cylinder, the output shaft and the guide post welded fastening of cylinder. The utility model discloses simple structure, convenient operation can fine removing dust, and the guarantee has been brought to the body and mind safety of giving people, and when needing to be changed the filter screen in addition, completion that can be very convenient is to the dismouting of filter screen.