A fabric pulling device

Abstract

This application relates to the field of fabric spreading machines, and provides a fabric spreading device, which includes a laying table, a fabric mounting mechanism, a fabric spreading mechanism, a cutting mechanism and a pressing mechanism; the fabric spreading mechanism includes a first clamping assembly, a first driving member, a second clamping assembly and a second driving member; the first clamping assembly includes a first mounting frame and two first clamping rollers, and a first airbag is circumferentially arranged around the first clamping rollers; the second clamping assembly includes a second mounting frame and two second clamping rollers, and a second airbag is circumferentially arranged around the second clamping rollers; the pressing mechanism includes a third mounting frame, a pressing cylinder and a fourth driving member, and the output end of the pressing cylinder is used to abut against the fabric. This application has the effect of realizing back-and-forth fabric spreading while reducing energy consumption.

Description

Technical Field

[0001] This application relates to the field of spreading machines, and in particular to a spreading device. Background Art

[0002] A spreading machine, also known as a cloth laying machine, is an auxiliary device for a sewing machine, mainly used for spreading cloth, and laying a roll of material flat into a multi-layer planar state.

[0003] There are mainly two types of existing spreading machines. One is that the body equipped with a cloth roller reciprocates on a flat table, which can achieve back-and-forth cloth laying. However, the body is usually large in size, heavy in weight, complex in structure, energy-consuming during movement, and has high requirements for the quality of the track. The other is to set a movable spreading mechanism on the flat table. When laying cloth, the spreading mechanism pulls the free end of the cloth from the cloth roller and moves along the flat table. The overall mass of the spreading mechanism is small, the volume is small, the energy consumption is low, it is convenient for maintenance, and it is also convenient to more intuitively observe the flat state of the cloth during the cloth laying process.

[0004] In summary, this application provides a spreading device that can achieve back-and-forth cloth laying while reducing energy consumption. Summary of the Invention

[0005] In order to achieve back-and-forth cloth laying while reducing energy consumption, this application provides a spreading device.

[0006] The spreading device provided by this application adopts the following technical solutions:

[0007] A fabric pulling device, comprising a flattening table, a fabric mounting mechanism, a fabric pulling mechanism, a cutting mechanism and a pressing mechanism; the fabric mounting mechanism includes a support frame and a fabric roller, the support frame is horizontally mounted across the flattening table, the fabric roller is rotatably connected to the support frame and is located above the flattening table, the fabric roller extends along the width direction of the flattening table and is used for winding the fabric; the fabric pulling mechanism includes a first clamping assembly, a first driving member, a second clamping assembly and a second driving member; the first clamping assembly includes a first mounting frame and two first clamping rollers, the first mounting frame is slidably connected to the flattening table along the length direction of the flattening table, the two first clamping rollers are both connected to the first mounting frame, and a first gap for the fabric to vertically pass through is formed between the two first clamping rollers; a first airbag is circumferentially arranged around the first clamping roller; the first driving member is used for driving the first mounting frame to slide relative to the flattening table; the second clamping assembly includes a second mounting frame and two second clamping rollers, the second mounting frame is slidably connected to the flattening table along the length direction of the flattening table; the two second clamping rollers are both connected to the second mounting frame, and a second gap for the fabric to vertically pass through is formed between the two second clamping rollers; a second airbag is circumferentially arranged around the second clamping roller; the second driving member is used for driving the second mounting frame to slide relative to the flattening table; the height of the second clamping assembly is higher than that of the first clamping assembly; the cutting mechanism includes a cutter and a third driving member, the cutter is slidably connected to the flattening table along the width direction of the flattening table, the third driving member is used for driving the cutter to slide relative to the flattening table; the height of the cutter is higher than that of the second clamping assembly and lower than that of the fabric roller; the pressing mechanism includes a third mounting frame, a pressing cylinder and a fourth driving member, the third mounting frame is slidably connected to the flattening table along the length direction of the flattening table, the pressing cylinder is vertically mounted on the third mounting frame, and the output end of the pressing cylinder is used for abutting against the fabric; the fourth driving member is mounted on the flattening table, and the fourth driving member is used for driving the third mounting frame to slide relative to the flattening table.

[0008] By adopting the above technical solution, taking the example of the fabric that has been flattened on the flattening table and the fabric pulling mechanism pulling the fabric to the left. When the fabric pulling device works, first, the first driving member moves the first clamping assembly to the position where the free end of the fabric will droop, the second driving member moves the second clamping assembly to directly above the first clamping assembly, and deflates the first airbag and the second airbag; then rotate the fabric roller, so that the free end of the fabric vertically droops under the action of gravity and passes through the second gap and the first gap in sequence. Then inflate the first airbag, and use the two first airbags to clamp the free end of the fabric.

[0009] Inflate the second airbag on the right side among the two second airbags. Then start the second driving member to drive the second clamping assembly to move away from the fabric roller. During the movement of the second clamping assembly, the second airbag and the second clamping roller on the right side abut and tension the fabric, driving the fabric to be laid flat to the left; after reaching the preset flat-laying length of the fabric, inflate the second airbag on the left side and deflate the second airbag on the right side, and at the same time, the second driving member drives the second clamping roller to move a short distance in the reverse direction, so that the fabric forms a fold at a predetermined position; at the same time, start the fourth driving member to move the third mounting bracket and the pressing cylinder to a predetermined position, and then start the pressing cylinder to press the folded position of the fabric with the end of the pressing cylinder.

[0010] After pressing the fabric tightly with the pressing cylinder, drive the second clamping assembly to continue to move in the direction close to the fabric roller. During the movement, use the second airbag and the second clamping roller on the left side to continue pulling the fabric, driving the fabric to be laid flat to the right, so as to realize back-and-forth laying.

[0011] When the second clamping assembly moves back under the fabric roller again, inflate the second airbag on the right side among the second airbags again, and clamp the fabric with the two second airbags; then start the third driving member to drive the cutter to cut the fabric above the second clamping assembly. While cutting, deflate the first airbag, and drive the first clamping assembly to move a short distance to the right through the first driving member. After the end of the fabric falls from the first airbag, drive the first clamping assembly to return, and then repeat the above process to continue pulling and laying the fabric back and forth.

[0012] During the above-mentioned entire fabric pulling process, only the second clamping assembly with a simple structure and light weight slides relative to the laying table, so the energy consumption is small, it is also convenient for maintenance, and at the same time, back-and-forth laying of the fabric is realized.

[0013] In addition, if one-way laying is required, the first driving member can also be used to drive the first clamping assembly holding the fabric to move away from the fabric roller. After moving to the preset laying length, inflate the two second airbags, clamp the fabric with the two second airbags, and then use the cutting mechanism to cut off the laid fabric.

[0014] The purpose of clamping the fabric first and then cutting it is to reduce the time difference of each point at the end of the fabric falling on the laying table and improve the flatness and neatness of the fabric laying.

[0015] Optionally, the second clamping roller is rotatably connected to the second mounting bracket, and the axis of rotation of the second clamping roller relative to the second mounting bracket is collinear with the central axis of the second clamping roller.

[0016] By adopting the above technical solution, during the fabric pulling process, the friction between the fabric and the second airbag is rolling friction, reducing the wear of the fabric and the second airbag.

[0017] Optionally, the first clamping roller is slidably connected to the first mounting bracket along the height direction of the first mounting bracket; the first mounting bracket is provided with a first air cylinder for driving the first clamping roller to slide along the height direction of the first mounting bracket; the second clamping roller is slidably connected to the second mounting bracket along the height direction of the second mounting bracket; the second mounting bracket is provided with a second air cylinder for driving the second clamping roller to slide along the height direction of the second mounting bracket.

[0018] By adopting the above technical solution, when the laying thickness of the fabric is relatively thick, the height of the first clamping roller is adjusted by the first air cylinder, and the height of the second clamping roller is adjusted by the second air cylinder to adapt to the thickness of the laid fabric, thereby improving the flexibility of use of the fabric pulling device.

[0019] Optionally, the second airbag includes a cylindrical bladder. The second clamping roller is disposed through the bladder. The end edge position of the bladder is fixedly connected to the end of the second clamping roller. The inner surface of the bladder and the circumferential side of the second clamping roller are limited to form the inner cavity of the second airbag; a first limiting plate is disposed on the circumferential side of the second clamping roller and extends along the length direction of the second clamping roller; a first gravity plate is connected to the inner surface of the bladder and extends along the length direction of the second clamping roller; a first sliding cavity is formed on the side wall of the first limiting plate away from the second clamping roller for accommodating the first gravity plate; when the second airbag is filled with gas, the side wall of the first limiting plate away from the first clamping roller abuts against the inner surface of the bladder.

[0020] It can be seen from the above operation process that when the second clamping assembly moves to the left, the second airbag on the left is not filled with gas, and at this time, the flexible bladder has a certain deformation ability. By adopting the above technical solution, when the second airbag is not filled with gas, under the gravity of the first limiting plate and the first gravity plate, the part of the bladder connected to the first gravity plate sags and abuts against the fabric that has been laid on the laying table, so as to smooth the fabric by using the second airbag and the first gravity plate therein, and improve the laying flatness of the fabric. During the process of the second clamping assembly moving to the right, the second airbag and the first gravity plate on the right are used to smooth the fabric that has been laid on the laying table, and the laying flatness of the fabric is improved.

[0021] Optionally, a plurality of second limiting plates are arranged on the circumferential side of the second clamping roller. The second limiting plates extend along the length direction of the second clamping roller, and the plurality of second limiting plates are arranged at intervals around the second clamping roller; the intervals between adjacent second limiting plates are the same, and the intervals between the first limiting plate and the left and right adjacent second limiting plates are the same as the intervals between adjacent second limiting plates; a second sliding cavity is formed in the side wall of the second limiting plate away from the second clamping roller, a plurality of second gravity plates are arranged on the inner surface of the bladder, and the second sliding cavity is used to accommodate the second gravity plates; a limiting portion is arranged on the cavity wall of the second sliding cavity, and an abutting portion is arranged on the side wall of the second gravity plate. The limiting portion is used for the abutting portion to abut; when the second airbag is filled with gas, there is an interval between the side of the second limiting plate away from the second clamping roller and the inner surface of the bladder, the abutting portion abuts against the limiting portion, and the abutting portion is located between the limiting portion and the second clamping roller; the first gravity plate and the second gravity plate are the same in material, volume and shape. The first limiting plate and the second limiting plate are both made of aluminum alloy, and a plurality of lightening holes are formed through the first limiting plate and the second limiting plate.

[0022] By adopting the above technical solution, by arranging the second gravity plates, making the intervals between adjacent second gravity plates the same, making the intervals between the first gravity plate and the left and right adjacent second gravity plates the same, and making the first gravity plate and the second gravity plate the same in material, volume and shape, the second gravity plates are used to balance the gravity of the first gravity plate when the second airbag is filled with gas, so that the rotation of the second airbag after being filled with gas is relatively stable, thereby ensuring the tensioning and guiding effects of the second airbag and the second clamping roller on the fabric, and reducing the influence on the fabric pulling speed.

[0023] After the second airbag is deflated, due to the limitation of the limiting portion on the abutting portion, the second gravity plate cannot move away from the second clamping roller, but can only move towards the second clamping roller, thereby driving the position of the bladder connected thereto to move towards the second clamping roller, and further causing the bladder connected to the first gravity plate to move away from the second clamping roller, changing the overall center of gravity of the second clamping roller, and realizing the automatic drooping of the first gravity plate.

[0024] Optionally, an elastic cord is disposed in the second sliding cavity. One end of the elastic cord is connected to a side of the second gravity plate close to the second clamping roller, and the other end is connected to the circumferential side of the second clamping roller. When the abutting portion abuts against the limiting portion, the elastic cord is in a stretched state. A biasing spring is disposed in the first sliding cavity. One end of the biasing spring is connected to a side of the first gravity plate close to the second clamping roller, and the other end is connected to the circumferential side of the second clamping roller. When the second airbag is filled with gas, the biasing spring is in a compressed state.

[0025] By adopting the above technical solution, after deflating the second airbag, the elastic cord in the second sliding cavity is used to force the second gravity plate to move towards the second clamping roller, and the biasing spring in the first sliding cavity is used to force the first gravity plate to move away from the second clamping roller, so as to ensure that the center of gravity of the second clamping roller can be quickly changed, and the first gravity plate can quickly and stably rotate to the hanging state.

[0026] Optionally, the fabric roller is detachably connected to the support frame.

[0027] By adopting the above technical solution, after the fabric on the fabric roller installed on the support frame is laid, the fabric roller is removed, a new fabric roller wound with fabric is replaced, and other devices are used to rewind the replaced fabric roller, thereby ensuring the working efficiency of the fabric pulling device.

[0028] Optionally, connection components are disposed on both the left and right sides of the support frame. The connection components include a connecting plate, fixing blocks, upper movable blocks and lower movable blocks. The connecting plate is rotatably connected to the support frame. There are two fixing blocks, and both fixing blocks are connected to the connecting plate. There is a vertical gap between the two fixing blocks. There are two upper movable blocks, and the upper movable blocks are horizontally slidably connected to the upper parts of the fixing blocks. The two upper movable blocks are connected to the two fixing blocks in a one-to-one correspondence. A first spring is disposed on the fixing block, and the first spring is used to force the two upper movable blocks to abut against each other. The lower movable block is disposed at the lower part of the fixing block. Connecting blocks are disposed at both ends of the fabric roller, and the connecting blocks are rectangular parallelepipeds. A space for accommodating the connecting blocks is defined between the two fixing blocks, the upper movable blocks and the lower movable blocks.

[0029] By adopting the above technical solution, when replacing the fabric roller, first apply a force to the two upper movable blocks to make the two upper movable blocks move away from each other, and then apply a force to the fabric roller. The connecting block is taken out of the two fixing blocks by the drive of the fabric roller, and the disassembly of the old fabric roller is completed. Then, the connecting block of the new fabric roller is placed between the two fixing blocks, and the force applied to the upper movable block is removed, and the installation of the new fabric roller is completed. The structure is simple and easy to operate.

[0030] Optionally, there are two lower movable blocks, which are horizontally slidably connected to the fixed block, and the two lower movable blocks are respectively connected to the two fixed blocks; both ends of the two upper movable blocks away from each other are fixedly connected with "U"-shaped connecting rods, and one end of the connecting rod away from the upper movable block is fixedly connected to the lower movable block; both of the two upper movable blocks are provided with guiding surfaces, and when the two upper movable blocks abut against each other, the two guiding surfaces form a "V" shape, and the guiding surfaces are used for the connecting block to abut against.

[0031] By adopting the above technical solution, when replacing the fabric roller, first rotate the old fabric roller until the two fixed blocks are in the vertical state; then place the new fabric roller above the upper movable block and lower it. Under the action of the new fabric roller and the guiding surface, the two upper movable blocks move away from each other; at the same time, the two upper movable blocks drive the two lower movable blocks to move away from each other through the connecting rods, so that the connecting block corresponding to the old fabric roller falls out from below the fixed block, thereby completing the removal of the old fabric roller while installing the new fabric roller, improving the replacement convenience.

[0032] Optionally, two limiting strips are arranged below the fixed block on the connecting plate. The limiting strips are in an "L" shape, and an "L"-shaped sliding groove is defined between the two limiting strips; the vertical part of the sliding groove is used to receive the connecting block falling from the fixed block, and the horizontal part of the sliding groove is used for the connecting block to pass through.

[0033] By adopting the above technical solution, on the one hand, after the connecting block corresponding to the old fabric roller falls off and enters the sliding groove and stays at the corner of the "L"-shaped sliding groove, the staff can take out the old fabric roller from the horizontal part of the sliding groove, improving the replacement convenience and safety; on the other hand, the limiting strips are used to adjust the center of gravity, so that in the natural state, the fixed block presents a vertical state, so that the staff does not need to rotate the old fabric roller when replacing the fabric roller, further improving the replacement convenience of the fabric roller.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] By providing a first clamping assembly that can be used to clamp the end of the fabric and a second clamping assembly that can be tensioned and drive the fabric to move, while realizing back-and-forth fabric laying, the structure for movement is simple, easy to repair, and consumes less energy;

[0036] By arranging a first limiting plate, a first gravity plate, a second limiting plate and a second gravity plate in the second airbag, while forming tension by using one second airbag in the second clamping assembly, the other second airbag is used to smooth the fabric that has been laid flat on the flat table, improving the neatness of the fabric laying;

[0037] By setting up a connection component on the support frame, the old fabric roller is removed while installing a new one, ensuring the fabric pulling efficiency of the fabric pulling device. Description of the Drawings

[0038] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present application.

[0039] Figure 2 is Figure 1 An enlarged schematic diagram of part A.

[0040] Figure 3 It is a schematic diagram for showing the structure of the cutting mechanism in Embodiment 1.

[0041] Figure 4 It is a schematic diagram for showing the state where the end of the fabric is successively placed between two first air bags and between two second air bags in Embodiment 1.

[0042] Figure 5 It is a schematic diagram for showing the state when the first clamping component clamps the end of the fabric in Embodiment 1.

[0043] Figure 6 It is a schematic diagram for showing the state during the process where the second clamping component drives the fabric to be laid flat to the left in Embodiment 1.

[0044] Figure 7 It is a schematic diagram for showing the state during the process where the second clamping component drives the fabric to be laid flat to the right when returning in Embodiment 1.

[0045] Figure 8 It is a schematic diagram for showing the state when the second clamping component returns below the fabric roller in Embodiment 1.

[0046] Figure 9 It is a schematic diagram of the structure of Embodiment 2 of the present application.

[0047] Figure 10 It is a schematic diagram for showing the distribution state of the first gravity plate and the second gravity plate in Embodiment 2.

[0048] Figure 11 is Figure 10 An enlarged schematic diagram of part B.

[0049] Figure 12 It is a schematic diagram for showing the state when the first gravity plate is in a drooping state in Embodiment 2.

[0050] Figure 13 It is a schematic diagram of the structure of Embodiment 3 of the present application.

[0051] Figure 14 It is a schematic diagram for showing the structure of the fabric roller in Embodiment 3.

[0052] Description of reference numerals: 1, laying table; 2, fabric mounting mechanism; 21, support frame; 22, fabric roller; 221, connecting block; 3, fabric pulling mechanism; 31, first clamping assembly; 311, first mounting frame; 312, first clamping roller; 313, first airbag; 314, first cylinder; 32, first driving member; 33, second clamping assembly; 331, second mounting frame; 332, second clamping roller; 333, second airbag; 334, second cylinder; 34, second driving member; 4, cutting mechanism; 41, cutter; 42, third driving member; 5, pressing mechanism; 51, third mounting frame; 52, pressing cylinder; 53, fourth driving member; 54, pressing plate; 6, connecting assembly; 61, connecting plate; 62, fixing block; 621, first spring cavity; 622, first spring; 623, blocking portion; 624, sliding cavity; 63, upper movable block; 631, limiting portion; 632, guiding surface; 64, lower movable block; 65, connecting rod; 66, limiting strip; 67, sliding groove; 7, bladder skin; 71, first limiting plate; 711, first sliding cavity; 712, light hole; 713, biasing spring; 72, first gravity plate; 73, second limiting plate; 731, second sliding cavity; 732, limiting portion; 733, elastic cord; 734, supporting airbag; 74, second gravity plate; 741, abutting portion. Detailed implementation manners

[0053] The following further describes the present application in detail with reference to Figure 1-14 the accompanying drawings.

[0054] It should be noted that, for more convenient and clear display, the drawings of the present application have been adjusted in proportion, which does not represent the proportional relationship of the actual object.

[0055] An embodiment of the present application discloses a fabric pulling device. Embodiment 1

[0056] Referring to Figures 1 to 3 , a fabric pulling device includes a laying table 1, a fabric mounting mechanism 2, a fabric pulling mechanism 3, a cutting mechanism 4 and a pressing mechanism 5.

[0057] The fabric mounting mechanism 2 includes a support frame 21 and a fabric roller 22. The support frame 21 is horizontally mounted across the laying table 1 along the width direction of the laying table 1. The fabric roller 22 is rotatably connected to the support frame 21. The fabric roller 22 is used for winding the fabric, and the fabric roller 22 is located above the laying table 1.

[0058] Among them, the fabric pulling mechanism 3 includes a first clamping assembly 31, a first driving member 32, a second clamping assembly 33 and a second driving member 34.

[0059] The first clamping assembly 31 includes a first mounting frame 311 and two first clamping rollers 312. The first mounting frame 311 is slidably connected to the laying table 1 along the length direction of the laying table 1. The two first clamping rollers 312 are both mounted on the first mounting frame 311, and a first gap is formed between the two first clamping rollers 312 for the fabric to pass through vertically. The first clamping roller 312 is rotatably connected to the first mounting frame 311, and the axis of rotation of the first clamping roller 312 relative to the first mounting frame 311 is collinear with the central axis of the first clamping roller 312.

[0060] A first airbag 313 is disposed around the circumferential side of the first clamping roller 312, and the first airbag 313 extends along the length direction of the first clamping roller 312. The first driving member 32 is used to drive the first mounting frame 311 to slide. In this embodiment, the first driving member 32 is a rodless cylinder.

[0061] The second clamping assembly 33 includes a second mounting frame 331 and two second clamping rollers 332. The second mounting frame 331 is slidably connected to the laying table 1 along the length direction of the laying table 1. The two second clamping rollers 332 are both connected to the second mounting frame 331, and a second gap is formed between the two second clamping rollers 332 for the fabric to pass through vertically. The second clamping roller 332 is rotatably connected to the second mounting frame 331, and the axis of rotation of the second clamping roller 332 relative to the second mounting frame 331 is collinear with the central axis of the second clamping roller 332.

[0062] A second airbag 333 is disposed around the circumferential side of the second clamping roller 332, and the second airbag 333 extends along the length direction of the second clamping roller 332. The second driving member 34 is used to drive the second mounting frame 331 to slide. In this embodiment, the second driving member 34 is a rodless cylinder to save installation space. The height of the second clamping assembly 33 is higher than the height of the first clamping assembly 31.

[0063] The cutting mechanism 4 includes a cutter 41 and a third driving member 42. The cutter 41 is slidably connected to the laying table 1 along the width direction of the laying table 1, and the third driving member 42 is used to drive the cutter 41 to slide relative to the laying table 1. The height of the cutter 41 is located between the fabric roller 22 and the second clamping assembly 33. Among them, the third driving member 42 can be a cylinder or a combination of a motor and a lead screw structure, as long as it can drive the cutter 41 to move.

[0064] The pressing mechanism 5 includes a third mounting frame 51, a pressing cylinder 52, and a fourth driving member 53. The third mounting frame 51 is slidably connected to the laying table 1 along the length direction of the laying table 1. The pressing cylinder 52 is vertically mounted on the third mounting frame 51, and the output end of the pressing cylinder 52 is used to abut against the fabric. The fourth driving member 53 is mounted on the laying table 1, and the fourth driving member 53 is used to drive the third mounting frame 51 to slide relative to the laying table 1. In this embodiment, the fourth driving member 53 is a rodless cylinder. In other embodiments, the fourth driving member 53 can also be a combination of a motor and a transmission belt, or a combination of a motor and a lead screw and a nut, as long as it can drive the third mounting frame 51 to move relative to the laying table 1.

[0065] When it is necessary to press the fabric, the third mounting frame 51 equipped with the pressing cylinder 52 is moved to the position where pressing is required through the fourth driving member 53, and then the pressing cylinder 52 is started so that the output end of the pressing cylinder 52 abuts against the fabric.

[0066] The output end of the pressing cylinder 52 is connected with a pressing plate 54. The pressing plate 54 extends along the width direction of the laying table 1, so that there is a large contact area between the pressing mechanism 5 and the fabric, reducing the damage to the fabric during the pressing process.

[0067] In this embodiment, a plurality of pressing cylinders 52 are provided, and the plurality of pressing cylinders 52 are arranged at equal intervals along the width direction of the laying table 1, improving the force uniformity of the pressing plate 54 and the fabric.

[0068] Furthermore, the first clamping roller 312 is slidably connected to the first mounting frame 311 along the height direction of the first mounting frame 311. The first mounting frame 311 is provided with a first cylinder 314, and the first cylinder 314 is used to drive the first clamping roller 312 to slide along the height direction of the first mounting frame 311. So as to facilitate adjusting the height of the first clamping roller 312 during the operation to adapt to the laying thickness of the fabric and improve the use flexibility of the fabric pulling device.

[0069] The second clamping roller 332 is slidably connected to the second mounting frame 331 along the height direction of the second mounting frame 331. The second mounting frame 331 is provided with a second cylinder 334, and the second cylinder 334 is used to drive the second clamping roller 332 to slide along the height direction of the second mounting frame 331. So as to facilitate adjusting the height of the second clamping roller 332 during the operation and improve the use flexibility of the fabric pulling device.

[0070] The implementation principle of Embodiment 1 is: Refer to Figure 4, before pulling the fabric, first perform the preparatory work: first, adjust the first clamping assembly 31 and the second clamping assembly 33 to the lower side of the fabric roller 22 through the first driving member 32 and the second driving member 34; then deflate the first airbag 313 and the second airbag 333 so that an interval for the free end of the fabric to naturally hang down to pass through is formed between the two first airbags 313 and between the two second airbags 333; then rotate the fabric roller 22 so that the free end of the fabric drops into the above-mentioned interval.

[0071] This embodiment provides two fabric pulling methods: the first is one-way fabric pulling; the second is back-and-forth two-way fabric pulling.

[0072] The operation steps of the first fabric pulling method are as follows: after completing the preparatory work, first inflate the first airbag 313, and clamp the fabric by using the two first airbags 313; then start the first driving member 32, and the first driving member 32 drives the first clamping assembly 31 to drive the end of the fabric to move. During the movement, the second clamping roller 332 and the second airbag 333 tension the fabric to make the fabric taut; after the first mounting frame 311 moves to the preset position, inflate the second airbag 333, and clamp the fabric by using the two second airbags 333; then start the third driving member 42 to drive the cutting knife 41 to cut the fabric at a position above the second clamping roller 332; after cutting, deflate the first airbag 313 and the second airbag 333, and drive the first mounting frame 311 to continue to move a short distance away from the fabric roller 22, so that the end of the fabric clamped by the first airbag 313 drops from the first airbag 313, and the end of the fabric clamped by the second airbag 333 drops. When the first clamping assembly 31 returns, refill the first airbag 313 with air, and use the first cylinder 314 to drive the first clamping roller 312 to move down a distance so that the first airbag 313 fits the laid fabric, so as to smooth the laid fabric by using the first airbag 313 during the return process, further improving the flatness of the laid fabric.

[0073] The operation steps of the second fabric pulling method are as follows: Refer to Figures 5 to 8, taking the example of the fabric pulling mechanism 3 pulling the fabric to the left for illustration. After completing the preparatory work, first inflate the first airbag 313, and use the two first airbags 313 to clamp the end of the fabric; then fill the second airbag 333 on the right side of the two second airbags 333 with gas; then start the second driving member 34, and the second driving member 34 drives the second clamping assembly 33 to move away from the fabric roller 22. During the movement, the second clamping roller 332 and the second airbag 333 form a tension on the fabric, driving the fabric to move. After the second clamping assembly 33 reaches the predetermined position, the second driving member 34 drives the second clamping roller 332 to move a short distance in the reverse direction, so that the fabric forms a fold at the predetermined position; start the fourth driving member 53, move the third mounting bracket 51 and the pressing cylinder 52 to the predetermined position, and start the pressing cylinder 52 to drive the pressing plate 54 to press the folded position of the fabric; then use the second driving member 34 to drive the second clamping assembly 33 to move towards the fabric roller 22, and at the same time deflate the second airbag 333 on the right side and fill the second airbag 333 on the left side with gas, and use the second clamping roller 332 and the second airbag 333 on the left side to form a tension on the fabric; when the second clamping assembly 33 returns to its original position, re-inflate the second airbag 333 on the right side, use the two second airbags 333 to clamp the fabric, and then use the cutting assembly to cut the material; finally, deflate the first airbag 313 and the second airbag 333, so that the end of the fabric falls onto the laying table 1. Embodiment 2

[0074] Refer to Figure 9 , the difference between this embodiment and Embodiment 1 is that the second airbag 333 includes a bladder 7, the bladder 7 is in a cylindrical structure with both ends open, the second clamping roller 332 is disposed through the bladder 7, and the end edge position of the bladder 7 is adhesively fixed to the end of the second clamping roller 332 by strong glue, and the inner surface of the bladder 7 and the circumferential side of the second clamping roller 332 are limited to form the inner cavity of the second airbag 333.

[0075] Refer to Figure 10 and Figure 11 , a first limiting plate 71 is fixedly connected to the circumferential side of the second clamping roller 332, the first limiting plate 71 extends along the length direction of the second clamping roller 332, and a first sliding cavity 711 is opened on the side wall of the first limiting plate 71 away from the second clamping roller 332. A first gravity plate 72 is fixedly connected to the inner surface of the bladder 7, the first sliding cavity 711 is used to accommodate the first gravity plate 72, the first gravity plate 72 can slide along the width direction of the first sliding cavity 711, and the side wall of the first gravity plate 72 is attached to the cavity wall of the first sliding cavity 711.

[0076] As can be seen from the implementation principle of the above-mentioned Embodiment 1, when using one of the second airbags 333 to play a tensioning role, it is necessary to fill the second airbag 333 with gas and deflate the other second airbag 333. At this time, the flexible bladder 7 of the other deflated second airbag 333 can deform. Therefore, in the case where the first limiting plate 71 and the first gravity plate 72 that can slide radially along the second clamping roller 332 relative to the first limiting plate 71 are provided, the first gravity plate 72 and the first limiting plate 71 will drive the second clamping roller 332 to rotate to a state where the first gravity plate 72 droops, and the first gravity plate 72 will drive the second airbag 333 at its connection position to abut against the fabric that has been laid flat on the laying table 1. Furthermore, during the movement of the second clamping assembly 33, the fabric is smoothed, the neatness of the fabric laying is improved, and bulges are reduced.

[0077] Referring to Figure 11 and Figure 12 , further, a plurality of second limiting plates 73 are fixed on the circumferential side of the second clamping roller 332. The second limiting plates 73 extend along the length direction of the second clamping roller 332, and the plurality of second limiting plates 73 are arranged at intervals around the second clamping roller 332. The intervals between two adjacent second limiting plates 73 are the same, and the intervals between the first limiting plate 71 and the two adjacent second limiting plates 73 on its left and right are both the same as the intervals between the adjacent second limiting plates 73.

[0078] A second sliding cavity 731 is formed on the side wall of the second limiting plate 73 away from the second clamping roller 332. A plurality of second gravity plates 74 are fixedly connected to the inner surface of the bladder 7. The second sliding cavity 731 is used to accommodate the second gravity plates 74, and the second gravity plates 74 can slide along the width direction of the second sliding cavity 731.

[0079] A limiting portion 732 is fixed on the cavity wall of the second sliding cavity 731, and an abutting portion 741 is fixed on the side wall of the second gravity plate 74. When the second airbag 333 is filled with gas, the abutting portion 741 abuts against the limiting portion 732, and the abutting portion 741 is located between the limiting portion 732 and the second clamping roller 332. That is, during the process of deflating the second airbag 333 filled with gas, through the cooperation of the limiting portion 732 and the abutting portion 741, the movement of the second gravity plate 74 away from the second clamping roller 332 is restricted.

[0080] When the second airbag 333 is filled with gas, there is an interval between the side wall of the second limiting plate 73 and the inner surface of the bladder 7. That is, during the process of deflating the second airbag 333 filled with gas, the second gravity plate 74 can move towards the second clamping roller 332.

[0081] A plurality of elastic ropes 733 are arranged in the second sliding cavity 731. One end of each elastic rope 733 is fixedly connected to the second clamping roller 332, and the other end is fixedly connected to the side wall of the second gravity plate 74 close to the second clamping roller 332. When the second airbag 333 is filled with gas, the elastic ropes 733 are in a stretched state. That is, during the process of deflating the second airbag 333 filled with gas, the elastic ropes 733 will force the second gravity plate 74 to move towards the direction close to the second clamping roller 332. Wherein the plurality of elastic ropes 733 are arranged at equal intervals along the length direction of the second clamping roller 332.

[0082] The first gravity plate 72 and the second gravity plate 74 are made of the same material, have the same volume and shape. In this embodiment, both the first gravity plate 72 and the second gravity plate 74 are made of stainless steel. When the second airbag 333 is filled with gas, the plurality of second gravity plates 74 are used to balance the first gravity plate 72, so that the center of gravity of the second clamping roller 332 is as close as possible to its center of gravity position, reducing the influence on the stability of the cloth pulling speed during tensioning and guiding the cloth.

[0083] Both the first limiting plate 71 and the second limiting plate 73 are made of relatively light aluminum alloy. Lightweight holes 712 are formed through the side walls of the first limiting plate 71 and the second limiting plate 73 to reduce the influence of the first limiting plate 71 and the second limiting plate 73 with different shapes and volumes on the center of gravity of the second clamping roller 332.

[0084] Furthermore, a force-applying spring 713 is arranged in the first sliding cavity 711. One end of the force-applying spring 713 is embedded on the side of the first gravity plate 72 close to the second clamping roller 332, and the other end is embedded in the second clamping roller 332. When the second airbag 333 is filled with gas, the force-applying spring 713 is in a compressed state. Thus, when deflating the second airbag 333, the force-applying spring 713 is used to force the first gravity plate 72 to move away from the second clamping roller 332.

[0085] Furthermore, a support airbag 734 is arranged in the second sliding cavity 731. The support airbag 734 extends along the length direction of the second sliding cavity 731. When inflating the second airbag 333, the support airbag 734 is inflated simultaneously. The support airbag 734 forms a support for the second gravity plate 74, so that the position of the bladder skin 7 connected to the second gravity plate 74 can be in a tensioned state, ensuring that each position of the bladder skin 7 remains in a smooth state after the second airbag 333 is filled with gas. Embodiment 3

[0086] Referring to Figure 13 and Figure 14 This embodiment is different from Embodiment 1 in that connecting components 6 are rotatably connected to both the left and right sides of the support frame 21, and the two ends of the cloth roller 22 are detachably connected to the two connecting components 6 respectively.

[0087] Specifically, connection blocks 221 in the shape of a cuboid are fixedly connected to both ends of the fabric roller 22.

[0088] The connection assembly 6 includes a connection plate 61, fixing blocks 62, upper movable blocks 63 and lower movable blocks 64. The connection plate 61 is rotatably connected to the support frame 21. There are two fixing blocks 62, and the two fixing blocks 62 are respectively used for the two side walls of the connection blocks 221 facing away from each other to abut against.

[0089] There are two upper movable blocks 63, and the two upper movable blocks 63 are respectively slidably connected to the upper parts of the two fixing blocks 62. The direction in which the upper movable blocks 63 slide relative to the fixing blocks 62 is the horizontal direction, and the two upper movable blocks 63 are at the same height. Inclined guide surfaces 632 are provided at the ends of the two upper movable blocks 63 close to each other. When the ends of the two upper movable blocks 63 abut against each other, the two guide surfaces 632 form a "V" shape.

[0090] A first spring cavity 621 is penetrated and opened on the side wall of the fixing block 62. A first spring 622 is arranged in the first spring cavity 621, and a part of the upper movable block 63 is inserted into the first spring 622. Partition parts 623 are arranged at the ends of the first spring cavity 621. A limiting part 631 is arranged on the peripheral side of the upper movable block 63. One end of the first spring 622 abuts against the partition part 623, and the other end abuts against the limiting part 631. When the first spring 622 is in its original length, the two upper movable blocks 63 abut against each other.

[0091] There are two lower movable blocks 64, and the two lower movable blocks 64 are respectively slidably connected to the lower parts of the two fixing blocks 62. The direction in which the lower movable blocks 64 slide relative to the fixing blocks 62 is the horizontal direction, and the two lower movable blocks 64 are at the same height. In this embodiment, the connection method between the lower movable block 64 and the fixing block 62 refers to the connection method between the upper movable block 63 and the fixing block 62, and the two are essentially the same, that is, the fixing block 62 is also provided with corresponding second spring cavities and second springs, and the specific structure will not be described in detail here. The difference is that the lower movable block 64 is not provided with a guide surface.

[0092] Both ends of the two upper movable blocks 63 that are away from each other are fixedly connected with "U"-shaped connecting rods 65. One end of the connecting rod 65 away from the upper movable block 63 is fixedly connected to the lower movable block 64, so that the upper movable block 63 can drive the lower movable block 64 to move when moving. When replacing the fabric roller 22, first rotate the old fabric roller 22 until the two fixed blocks 62 are in the vertical state; then place the new fabric roller 22 above the upper movable block 63 and lower it. Under the action of the new fabric roller 22 and the guide surface 632, the two upper movable blocks 63 move in the direction away from each other; at the same time, the two upper movable blocks 63 drive the two lower movable blocks 64 to move away from each other through the connecting rods 65, so that the connecting block 221 corresponding to the old fabric roller 22 falls out from below the fixed block 62, thereby completing the removal of the old fabric roller 22 while installing the new fabric roller 22, improving the replacement convenience.

[0093] Further, two "L"-shaped limit strips 66 are provided on the surface of the connecting plate 61. An "L"-shaped sliding groove 67 is formed between the two limit strips 66. The vertical part of the sliding groove 67 is used to receive the connecting block 221 that falls between the two lower movable blocks 64, and the horizontal part of the sliding groove 67 is used for the connecting block 221 to pass through. After the staff completes the installation of the new fabric roller 22, the connecting block 221 is taken out from the horizontal part of the sliding groove 67, that is, the used fabric roller 22 is taken out, improving the convenience and safety of replacing the fabric roller 22.

[0094] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A spreading device, characterized in that: It includes a flattening table (1), a fabric mounting mechanism (2), a fabric pulling mechanism (3), a cutting mechanism (4) and a pressing mechanism (5); the fabric mounting mechanism (2) includes a support frame (21) and a fabric roller (22), the support frame (21) is horizontally mounted across the flattening table (1), the fabric roller (22) is rotatably connected to the support frame (21) and is located above the flattening table (1), the fabric roller (22) extends along the width direction of the flattening table (1) and is used for winding the fabric; the fabric pulling mechanism (3) includes a first clamping assembly (31), a first driving member (32), a second clamping assembly (33) and a second driving member (34); the first clamping assembly (31) includes a first mounting frame (311) and two first clamping rollers (312), the first mounting frame (311) is slidably connected to the flattening table (1) along the length direction of the flattening table (1), both of the two first clamping rollers (312) are connected to the first mounting frame (311), and a first gap through which the fabric can vertically pass is formed between the two first clamping rollers (312); a first airbag (313) is circumferentially arranged around the first clamping roller (312); the first driving member (32) is used for driving the first mounting frame (311) to slide relative to the flattening table (1); the second clamping assembly (33) includes a second mounting frame (331) and two second clamping rollers (332), the second mounting frame (331) is slidably connected to the flattening table (1) along the length direction of the flattening table (1); both of the two second clamping rollers (332) are connected to the second mounting frame (331), and a second gap through which the fabric can vertically pass is formed between the two second clamping rollers (332); a second airbag (333) is circumferentially arranged around the second clamping roller (332); the second driving member (34) is used for driving the second mounting frame (331) to slide relative to the flattening table (1); the height of the second clamping assembly (33) is higher than the height of the first clamping assembly (31); the cutting mechanism (4) includes a cutting knife (41) and a third driving member (42), the cutting knife (41) is slidably connected to the flattening table (1) along the width direction of the flattening table (1), the third driving member (42) is used for driving the cutting knife (41) to slide relative to the flattening table (1); the height of the cutting knife (41) is higher than the second clamping assembly (33) and lower than the fabric roller (22); The pressing mechanism (5) includes a third mounting bracket (51), a pressing cylinder (52), and a fourth driving member (53). The third mounting bracket (51) is slidably connected to the laying table (1) along the length direction of the laying table (1). The pressing cylinder (52) is vertically mounted on the third mounting bracket (51), and the output end of the pressing cylinder (52) is used to abut against the fabric. The fourth driving member (53) is mounted on the laying table (1), and the fourth driving member (53) is used to drive the third mounting bracket (51) to slide relative to the laying table (1). The second airbag (333) includes a cylindrical bladder (7). The second clamping roller (332) passes through the bladder (7). The end edge position of the bladder (7) is fixedly connected to the end of the second clamping roller (332). The inner surface of the bladder (7) and the circumferential side of the second clamping roller (332) are limited to form the inner cavity of the second airbag (333). A first limiting plate (71) is arranged on the circumferential side of the second clamping roller (332), and the first limiting plate (71) extends along the length direction of the second clamping roller (332). A first gravity plate (72) is connected to the inner surface of the bladder (7), and the first gravity plate (72) extends along the length direction of the second clamping roller (332). A first sliding cavity (711) is formed on the side wall of the first limiting plate (71) away from the second clamping roller (332), and the first sliding cavity (711) is used to accommodate the first gravity plate (72). When the second airbag (333) is filled with gas, the side wall of the first limiting plate (71) away from the first clamping roller (312) abuts against the inner surface of the bladder (7). A plurality of second limiting plates (73) are arranged on the circumferential side of the second clamping roller (332), and the second limiting plates (73) extend along the length direction of the second clamping roller (332). The plurality of second limiting plates (73) are arranged at intervals around the second clamping roller (332). A second sliding cavity (731) is formed on the side wall of the second limiting plate (73) away from the second clamping roller (332). A plurality of second gravity plates (74) are arranged on the inner surface of the bladder (7), and the second sliding cavity (731) is used to accommodate the second gravity plates (74). When the second airbag (333) is filled with gas, there is a gap between the side of the second limiting plate (73) away from the second clamping roller (332) and the inner surface of the bladder (7). When the second airbag (333) is not filled with gas, under the gravity of the first limiting plate (71) and the first gravity plate (72), the part of the bladder (7) connected to the first gravity plate (72) sags and abuts against the fabric already laid on the laying table (1).

2. The fabric pulling device according to claim 1, characterized in that: The second clamping roller (332) is rotatably connected to the second mounting bracket (331), and the axis of rotation of the second clamping roller (332) relative to the second mounting bracket (331) is collinear with the central axis of the second clamping roller (332).

3. The laying device according to claim 2, characterized in that: The first clamping roller (312) is slidably connected to the first mounting bracket (311) along the height direction of the first mounting bracket (311); the first mounting bracket (311) is provided with a first air cylinder (314), and the first air cylinder (314) is used to drive the first clamping roller (312) to slide along the height direction of the first mounting bracket (311); the second clamping roller (332) is slidably connected to the second mounting bracket (331) along the height direction of the second mounting bracket (331); the second mounting bracket (331) is provided with a second air cylinder (334), and the second air cylinder (334) is used to drive the second clamping roller (332) to slide along the height direction of the second mounting bracket (331).

4. A spreading device according to claim 2, characterized in that: The intervals between adjacent second limiting plates (73) are the same, and the intervals between the first limiting plate (71) and the adjacent second limiting plates (73) on the left and right are the same; the inner wall of the second sliding cavity (731) is provided with a limiting portion (732), and the side wall of the second gravity plate (74) is provided with an abutting portion (741), and the limiting portion (732) is used for the abutting portion (741) to abut; the abutting portion (741) abuts against the limiting portion (732), and the abutting portion (741) is located between the limiting portion (732) and the second clamping roller (332); the first gravity plate (72) and the second gravity plate (74) are the same in material, volume and shape, and both the first limiting plate (71) and the second limiting plate (73) are made of aluminum alloy, and a plurality of lightening holes (712) are formed through the first limiting plate (71) and the second limiting plate (73).

5. A spreading device according to claim 4, characterized in that: An elastic cord (733) is arranged in the second sliding cavity (731), one end of the elastic cord (733) is connected to the side of the second gravity plate (74) close to the second clamping roller (332), and the other end is connected to the circumference of the second clamping roller (332); when the abutting portion (741) abuts against the limiting portion (732), the elastic cord (733) is in a stretched state; a biasing spring (713) is arranged in the first sliding cavity (711), one end of the biasing spring (713) is connected to the side of the first gravity plate (72) close to the second clamping roller (332), and the other end is connected to the circumference of the second clamping roller (332); when the second airbag (333) is filled with gas, the biasing spring (713) is in a compressed state.

6. A spreading device according to claim 1, characterized in that: The fabric roller (22) is detachably connected to the support frame (21).

7. A spreading device according to claim 6, characterized in that: On both the left and right sides of the support frame (21), connection components (6) are provided. The connection components (6) include a connection plate (61), fixed blocks (62), upper movable blocks (63), and lower movable blocks (64). The connection plate (61) is rotatably connected to the support frame (21). There are two fixed blocks (62), and both of the two fixed blocks (62) are connected to the connection plate (61). There is a vertical gap between the two fixed blocks (62). There are two upper movable blocks (63), and the upper movable blocks (63) are horizontally slidably connected to the upper parts of the fixed blocks (62). The two upper movable blocks (63) are correspondingly connected to the two fixed blocks (62). The fixed blocks (62) are provided with first springs (622), and the first springs (622) are used to force the two upper movable blocks (63) to abut against each other. The lower movable blocks (64) are arranged at the lower parts of the fixed blocks (62). Both ends of the fabric roller (22) are provided with connection blocks (221), and the connection blocks (221) are cuboids. A space for accommodating the connection blocks (221) is defined among the two fixed blocks (62), the upper movable blocks (63), and the lower movable blocks (64).

8. A spreading device according to claim 7, characterized in that: There are two lower movable blocks (64), and the lower movable blocks (64) are horizontally slidably connected to the fixed blocks (62). The two lower movable blocks (64) are correspondingly connected to the two fixed blocks (62). Connecting rods (65) are fixed to the mutually remote ends of the two upper movable blocks (63). One end of the connecting rod (65) remote from the upper movable block (63) is connected to the lower movable block (64). Both of the two upper movable blocks (63) are provided with guiding surfaces (632). When the two upper movable blocks (63) abut against each other, the two guiding surfaces (632) form a "V" shape, and the guiding surfaces (632) are used for...

9. The laying device according to claim 8, characterized in that: Below the fixed blocks (62) on the connection plate (61), two limiting strips (66) are provided. The limiting strips (66) are in an "L" shape. An "L"-shaped sliding groove (67) is defined between the two limiting strips (66). The vertical part of the sliding groove (67) is used to receive the connection blocks (221) falling from the fixed blocks (62), and the horizontal part of the sliding groove (67) is used for the connection blocks (221) to pass through.

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