A bag opening size adjusting device

Abstract

This utility model discloses a bag opening size adjustment device for installation at the bag opening station of a template machine to fix the fabric and expose the opening area. It includes: a fabric placement platform, an adjusting plate assembly, and a pressing plate assembly. The fabric placement platform includes a mounting base plate and a top cover plate that mates with the upper part of the mounting base plate. The mounting base plate has a first through hole in its center, and the top cover plate has a second through hole corresponding to the first through hole. The adjusting plate assembly is movably installed between the mounting base plate and the top cover plate. The adjusting plate assembly has a third through hole in its center for connecting the first and second through holes, and the adjusting plate assembly can move to adjust the size of the third through hole. The pressing plate assembly is rotatably connected to the fabric placement platform and is used to press the fabric to be opened onto the fabric placement platform. The pressing plate assembly has a fourth through hole in its center that communicates with the third through hole. This design allows for adjustment of multiple bag sizes.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to a bag opening size adjustment device. Background Technology

[0002] In existing technologies, the processing of bag openings involves cutting, folding, shaping, and sewing the bag opening area. Cutting involves making a Y-shaped slit at both ends of the bag opening; folding involves folding the cut bag opening inwards to form a folded edge; shaping involves placing the folded edge on the folded edge; and finally, sewing is performed. Currently, the bag opening process is mainly done manually, which is labor-intensive and inefficient. Furthermore, the folding and shaping of the cut bag openings are cumbersome and result in poor shaping quality, easily leading to problems with the garment's bag opening process. The workmanship is skewed and twisted. The bag opening shaping mechanism is complex and cumbersome to operate, making it difficult to efficiently and smoothly shape the bag opening accurately during the folding process. The shaping of the four sides of the garment bag opening uses four independent drive mechanisms to limit and block the four sides of the bag opening during the folding process, making it difficult to achieve synchronous and stable shaping of the four sides of the bag opening during the folding process. This affects the efficiency and quality of the shaping process of the four sides of the bag opening. Furthermore, it is difficult to accurately adjust the shaping size of the bag opening during the shaping process of the four sides of the bag opening, making it difficult to adapt to the opening processing needs of different sized pockets and failing to meet the needs of production.

[0003] Therefore, how to provide a pocket opening size adjustment device that can accommodate the adjustment of multiple pocket sizes is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a bag opening size adjustment device that can accommodate the adjustment of multiple bag sizes.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A bag opening size adjustment device, for installation at the bag opening station of a template machine to fix the fabric and expose the opening area, includes:

[0007] The fabric placement platform includes a mounting base plate and an upper cover plate that is connected to the upper part of the mounting base plate. The mounting base plate has a first through hole in the middle, and the upper cover plate has a second through hole corresponding to the first through hole.

[0008] An adjusting plate assembly is movably installed between the mounting base plate and the top cover plate. The adjusting plate assembly has a third through hole in the middle for connecting the first through hole and the second through hole. The adjusting plate assembly can be moved to adjust the size of the third through hole.

[0009] The fabric pressing plate assembly is rotatably connected to the fabric placement platform. The fabric pressing plate assembly is used to press the fabric to be opened onto the fabric placement platform. The fabric pressing plate assembly has a fourth through hole in the middle that communicates with the third through hole.

[0010] Preferably, the adjusting plate assembly includes: a front adjusting plate group and a rear adjusting plate group arranged opposite to each other, and a left adjusting plate group and a right adjusting plate group arranged opposite to each other. The front adjusting plate group, the rear adjusting plate group, the left adjusting plate group and the right adjusting plate group form a third through hole. The front adjusting plate group and the rear adjusting plate group can move relative to each other in a first direction, and the left adjusting plate group and the right adjusting plate group can move relative to each other in a second direction.

[0011] Preferably, the front adjustment plate group, the rear adjustment plate group, the left adjustment plate group, and the right adjustment plate group are connected by a transmission, and the four can move closer or further away synchronously to adjust the size of the third through hole. One of the front adjustment plate group, the rear adjustment plate group, the left adjustment plate group, and the right adjustment plate group is connected to a drive source, and the drive source is hinged to a fixed hinge seat provided at the end of the fabric placement platform.

[0012] Preferably, the drive source is a cylinder or a hydraulic cylinder, and the end of the movable shaft of the drive source is connected to the front adjusting plate assembly through a connecting plate.

[0013] Preferably, the front adjustment plate group and the rear adjustment plate group are arranged on the same plane, and the left adjustment plate group and the right adjustment plate group are arranged on the same plane. The left adjustment plate group and the right adjustment plate group are respectively laid with left pads and right pads between them and the mounting base plate, so that they are staggered with the front adjustment plate group and the rear adjustment plate group in the direction perpendicular to the mounting base plate.

[0014] Preferably, the system also includes a gear set, which includes a first drive gear and a second drive gear disposed on the left pad, and a third drive gear and a fourth drive gear disposed on the right pad. The first drive gear, the second drive gear, the third drive gear and the fourth drive gear are arranged in a square shape.

[0015] The first drive gear links the front adjustment plate group and the left adjustment plate group; the second drive gear links the left adjustment plate group and the rear adjustment plate group; the third drive gear links the rear adjustment plate group and the right adjustment plate group; and the fourth drive gear links the right adjustment plate group and the front adjustment plate group.

[0016] Preferably, the front adjusting plate assembly includes a detachably connected front adjusting plate and a front rack plate, the rear adjusting plate assembly includes a detachably connected rear adjusting plate and a rear rack plate, the left adjusting plate assembly includes a detachably connected left adjusting plate and a left rack plate, and the right adjusting plate assembly includes a detachably connected right adjusting plate and a right rack plate. The front rack plate, rear rack plate, left rack plate, and right rack plate are all provided with rack segments that mesh with the gear set.

[0017] Preferably, the front adjustment plate group, the rear adjustment plate group, the left adjustment plate group, and the right adjustment plate group all include a pressure plate, which is used to fix the front adjustment plate and the front rack plate, the rear adjustment plate and the rear rack plate, the left adjustment plate and the left rack plate, and the right adjustment plate and the right rack plate.

[0018] Preferably, the front rack plate is provided with a limiting groove near the end of the rear adjustment plate assembly, and the rear rack plate is provided with a limiting protrusion that cooperates with the limiting groove on the side near the front adjustment plate assembly.

[0019] Preferably, the pressing plate assembly is hinged to the fixed hinge seat, and several magnetic strips are provided on the circumference of the fourth through hole of the pressing plate assembly so that the pressing plate assembly can be attracted to the upper cover plate to clamp the fabric.

[0020] Compared to the aforementioned background technology, the present invention provides a bag opening size adjustment device for installation at the bag opening station of a template machine to fix the fabric and expose the opening area. The device includes: a fabric placement platform, an adjustment plate assembly, and a pressing plate assembly. The fabric placement platform includes a mounting base plate and an upper cover plate that is connected to the upper side of the mounting base plate. The mounting base plate has a first through hole in its center, and the upper cover plate has a second through hole corresponding to the first through hole. The adjustment plate assembly is movably installed between the mounting base plate and the upper cover plate. The adjustment plate assembly has a third through hole in its center that connects the first and second through holes. The adjustment plate assembly can be moved to adjust the size of the third through hole. The pressing plate assembly is rotatably connected to the fabric placement platform and is used to press the fabric to be opened onto the fabric placement platform. The pressing plate assembly has a fourth through hole in its center that communicates with the third through hole.

[0021] Specifically, the bag opening size adjustment device is installed at the bag opening station of the template machine. It can fix the fabric on a flat surface and expose the area to be opened so that the cutting device can open the bag from the exposed fabric. In this embodiment, the first through hole, the second through hole, and the third through hole correspond to each other. The size of the third through hole is the size of the exposed fabric. When the fabric is opened, this area is the size of the bag. When using this device, first, without placing the fabric, move the adjustment plate assembly so that the size of the third through hole in the middle reaches the preset size. Then, lift the fabric pressing plate assembly, then lay the fabric on the top cover plate, then lower the fabric pressing plate assembly to press the fabric. Finally, the cutting device can be started to open the bag in the area of ​​the third through hole. In this way, when different sizes of bag openings are needed, as long as the adjustment plate assembly can be moved to adjust the size of the third through hole, the cutting device will open the bag in the area of ​​the third through hole. This can improve the bag opening efficiency of the template machine and reduce the operating cost of the template machine. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the closed state structure of the pressure plate assembly of the bag opening size adjustment device provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the open state structure of the pressure plate assembly of the bag opening size adjustment device provided in this embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the adjustment plate assembly structure provided in an embodiment of the present utility model;

[0026] Figure 4 for Figure 3 Another structural diagram from a different angle.

[0027] in:

[0028] 100-Fabric placement platform, 110-Mounting base plate, 120-Top cover plate, 130-Fixed hinge seat, 140-Left pad, 150-Right pad;

[0029] 210-Third through hole, 221-Front adjusting plate, 222-Front rack plate, 223-Limiting groove, 231-Rear adjusting plate, 232-Rear rack plate, 233-Limiting protrusion, 241-Left adjusting plate, 242-Left rack plate, 251-Right adjusting plate, 252-Right rack plate, 260-Rack segment, 270-Pressure plate;

[0030] 300 - Fabric pressing plate assembly, 310 - Fourth through hole, 320 - Magnetic strip;

[0031] 400 - Driver source, 410 - Connector board;

[0032] 510 - First drive gear, 520 - Second drive gear, 530 - Third drive gear, 540 - Fourth drive gear. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0036] The purpose of this invention is to provide a bag opening size adjustment device that can accommodate the adjustment of multiple bag sizes.

[0037] It should be noted that in this embodiment, the X direction in the attached figure is defined as the first direction, the Y direction is defined as the second direction, and the first direction and the second direction are perpendicular.

[0038] To achieve the above objectives, the present invention provides the following technical solution:

[0039] Please see Figures 1 to 4 This embodiment provides a bag opening size adjustment device for installation at the bag opening station of a template machine to fix the fabric and expose the opening area. It includes: a fabric placement platform 100, an adjustment plate assembly, and a pressing plate assembly 300. The fabric placement platform 100 includes a mounting base plate 110 and an upper cover plate 120 that mates with the upper side of the mounting base plate 110. The mounting base plate 110 has a first through hole in its center, and the upper cover plate 120 has a second through hole corresponding to the first through hole. The adjustment plate assembly is movable. The device is installed between the mounting base plate 110 and the top cover plate 120. The adjusting plate assembly has a third through hole 210 in the middle for connecting the first through hole and the second through hole. The adjusting plate assembly can be moved to adjust the size of the third through hole 210. The pressing plate assembly 300 is rotatably connected to the fabric placement platform 100. The pressing plate assembly 300 is used to press the fabric to be opened onto the fabric placement platform 100. The pressing plate assembly 300 has a fourth through hole 310 in the middle for communicating with the third through hole 210.

[0040] In this embodiment, the fabric placement platform 100 is a flat structure used to support the fabric. The fabric placement platform 100 includes a mounting base plate 110 and a top cover plate 120, with a certain gap between them. An adjusting plate assembly is installed in this gap and can move within it. It is understood that, to facilitate cutting devices, such as laser cutters, to open the fabric laid on the fabric placement platform 100, a through-hole is provided in its center. Specifically, the mounting base plate 110 has a first through-hole in its center, and the top cover plate 120 has a second through-hole in its center. The middle part of the adjusting plate assembly has a third through hole 210. Correspondingly, the pressing plate assembly 300 also has a fourth through hole 310. When opening the bag, the laser will pass through these through holes to cut the fabric inside, but the laser will not cut other parts. However, it should be noted that in this embodiment, the size of the third through hole 210 can be changed according to the movement of the adjusting plate assembly. Therefore, in this embodiment, the maximum size of the third through hole 210 is set to be smaller than the size of the first through hole, the second through hole and the fourth through hole 310. In this way, the size of the bag opening can be determined by the third through hole 210.

[0041] Specifically, the bag opening size adjustment device is installed at the bag opening station of the template machine. It can fix the fabric on a flat surface and expose the area to be opened so that the cutting device can open the bag from the exposed fabric. In this embodiment, the first through hole, the second through hole, and the third through hole 210 correspond to each other. The size of the third through hole 210 is the size of the exposed fabric. When the fabric is opened, this area is the size of the bag opening. When using this device, first, without fabric, move the adjusting plate assembly so that the size of the third through hole 210 in the middle reaches the preset size. Then, the pressing plate assembly 30 is used. 0. Open the cover plate 120, then lay the fabric on the cover plate 120, then lower the pressing plate assembly 300 to press the fabric, and finally start the cutting device to open the bag in the area of ​​the third through hole 210. In this way, when different sizes of bag openings are needed, you can simply move the adjusting plate assembly to adjust the size of the third through hole 210, and the cutting device will open the bag in the area of ​​the third through hole 210. This can improve the bag opening efficiency of the template machine, and the template machine does not need to change different templates each time different sizes of bag openings are needed, thus reducing the operating cost of the template machine.

[0042] Preferably, the adjusting plate assembly includes: a front adjusting plate group 221 and a rear adjusting plate group 231 arranged opposite to each other, and a left adjusting plate group 241 and a right adjusting plate group 251 arranged opposite to each other. The front adjusting plate group 221, the rear adjusting plate group 231, the left adjusting plate group 241 and the right adjusting plate group 251 form a third through hole 210. The front adjusting plate group 221 and the rear adjusting plate group 231 are movable relative to each other in a first direction, and the left adjusting plate group 241 and the right adjusting plate group 251 are movable relative to each other in a second direction.

[0043] Please see Figure 3 and Figure 4 Understandably, in order to adjust the size of the third through hole 210, in this embodiment, the adjusting plate assembly includes four parts: a front adjusting plate group 221, a rear adjusting plate group 231, a left adjusting plate group 241, and a right adjusting plate group 251. The front adjusting plate group 221 and the rear adjusting plate group 231 can move relative to or away from each other in a first direction. The left adjusting plate group 241 and the right adjusting plate group 251 are respectively arranged on the left and right sides of the front adjusting plate group 221 and the rear adjusting plate group 231, and can move relative to or away from each other in a second direction. With this arrangement, the position of the size of the third through hole 210 can be changed by moving the positions of the front adjusting plate group 221, the rear adjusting plate group 231, the left adjusting plate group 241, and the right adjusting plate group 251.

[0044] Furthermore, the front adjusting plate group 221, the rear adjusting plate group 231, the left adjusting plate group 241, and the right adjusting plate group 251 are connected by transmission, and the four can move closer or further away synchronously to adjust the size of the third through hole 210. One of the front adjusting plate group 221, the rear adjusting plate group 231, the left adjusting plate group 241, and the right adjusting plate group 251 is connected to the drive source 400, and the drive source 400 is hinged to the fixed hinge seat 130 provided at the end of the fabric placement platform 100.

[0045] In this embodiment, in order to facilitate the adjustment of the size of the third through hole 210 and reduce the trouble in the operation process, the four groups of front adjustment plate 221, rear adjustment plate 231, left adjustment plate 241 and right adjustment plate 251 are connected by transmission, that is, as long as one of the four moves, the other three can also move. In addition, in this embodiment, the four groups of front adjustment plate 221, rear adjustment plate 231, left adjustment plate 241 and right adjustment plate 251 can move closer or further away at the same time when they are in motion, that is, the size of the third through hole 210 can become smaller or larger.

[0046] In addition, a fixed hinge seat 130 is provided at one end of the fabric placement platform 100 in this embodiment. The fixed hinge seat 130 can connect the entire device to the template machine. A drive source 400 is also installed on the fixed hinge seat 130. The drive source 400 is connected to one of the four groups of front adjustment plate 221, rear adjustment plate 231, left adjustment plate 241 and right adjustment plate 251 to provide the power required for its movement.

[0047] Furthermore, the drive source 400 is specifically a cylinder or a hydraulic cylinder, and the end of the movable shaft of the drive source 400 is connected to the front adjusting plate 221 through the connecting plate 410.

[0048] In this embodiment, the driving source 400 is preferably a cylinder or a hydraulic cylinder. The cylinder body of either cylinder can be mounted on the fixed hinge seat 130, and the end of the piston rod can be connected to the front adjusting plate 221 group through the connecting plate 410. That is, by driving the front adjusting plate 221 group to move, the other three plate groups can be moved, thereby adjusting the size of the third through hole 210.

[0049] Preferably, the front adjustment plate group 221 and the rear adjustment plate group 231 are arranged on the same plane, and the left adjustment plate group 241 and the right adjustment plate group 251 are arranged on the same plane. The left adjustment plate group 241 and the right adjustment plate group 251 are respectively laid with a left pad 140 and a right pad 150 between them and the mounting base plate 110, so that they are staggered with the front adjustment plate group 221 and the rear adjustment plate group 231 in a direction perpendicular to the mounting base plate 110.

[0050] In this embodiment, in order to prevent interference and collision between the front adjustment plate group 221 and the rear adjustment plate group 231, the left adjustment plate group 241 and the right adjustment plate group 251 during movement, the front two and the rear two are arranged in a staggered manner in the vertical direction. The left adjustment plate group 241 is covered with a left pad 140, and the right adjustment plate group 251 is covered with a right pad 150. This arrangement can ensure that the bag opening size is infinitely adjustable.

[0051] Furthermore, the bag opening size adjustment device also includes a gear set, which includes a first drive gear 510 and a second drive gear 520 disposed on the left pad 140, and a third drive gear 530 and a fourth drive gear 540 disposed on the right pad 150. The first drive gear 510, the second drive gear 520, the third drive gear 530 and the fourth drive gear 540 are arranged in a square shape. The first drive gear 510 is linked to the front adjustment plate 221 group and the left adjustment plate 241 group, the second drive gear 520 is linked to the left adjustment plate 241 group and the rear adjustment plate 231 group, the third drive gear 530 is linked to the rear adjustment plate 231 group and the right adjustment plate 251 group, and the fourth drive gear 540 is linked to the right adjustment plate 251 group and the front adjustment plate 221 group.

[0052] Specifically, the gear set is distributed as follows: Figure 3 and Figure 4 As shown, the first drive gear 510, the second drive gear 520, the third drive gear 530 and the fourth drive gear 540 are respectively set at the four corners. Each drive gear is linked to two adjacent sets of adjustment plates. In this way, the front adjustment plate 221 set, the rear adjustment plate 231 set, the left adjustment plate 241 set and the right adjustment plate 251 set can be moved synchronously.

[0053] In this embodiment, the front adjusting plate 221 group includes a front adjusting plate 221 and a front rack plate 222 that are detachably connected; the rear adjusting plate 231 group includes a rear adjusting plate 231 and a rear rack plate 232 that are detachably connected; the left adjusting plate 241 group includes a left adjusting plate 241 and a left rack plate 242 that are detachably connected; and the right adjusting plate 251 group includes a right adjusting plate 251 and a right rack plate 252 that are detachably connected. The front rack plate 222, the rear rack plate 232, the left rack plate 242, and the right rack plate 252 are all provided with rack segments 260 that mesh with the gear set.

[0054] Specifically, such as Figure 3 and Figure 4 Each adjustment plate assembly consists of two parts: an adjustment plate and a gear plate. The adjustment plate and the gear plate are fixedly connected together. The gear plate is provided with a rack segment 260. When each adjustment plate assembly is installed, the rack segment 260 will mesh with the gear assembly to achieve linkage.

[0055] Preferably, the front adjusting plate group 221, the rear adjusting plate group 231, the left adjusting plate group 241, and the right adjusting plate group 251 all include a pressure plate 270, which is used to fix the front adjusting plate 221 and the front rack plate 222, the rear adjusting plate 231 and the rear rack plate 232, the left adjusting plate 241 and the left rack plate 242, and the right adjusting plate 251 and the right rack plate 252.

[0056] Understandably, when none of the dimensions of the third through hole 210 meet the requirements, the size range of the third through hole 210 can be further changed by adjusting the relative positions of each set of adjusting plates and rack plates. This setting can further increase the range of bag openings that the device can accommodate for opening bags.

[0057] Preferably, the front rack plate 222 is provided with a limiting groove 223 near the end of the rear adjusting plate 231 group, and the rear rack plate 232 is provided with a limiting protrusion 233 that cooperates with the limiting groove 223 on the side near the front adjusting plate 221 group.

[0058] Understandably, in order to prevent the adjustment plates in various directions from interfering with each other due to the continuous shrinkage of the size of the third through hole 210, a semi-circular arc-shaped limiting groove 223 is provided at the rear end of the front rack plate 222. At the same time, a corresponding limiting protrusion 233 is provided on the front side of the rear rack plate 232. In this way, when the two come into contact, the front adjustment plate 221 group and the rear adjustment plate 231 group will be back-locked and unable to move further, so the adjustment plate assembly will stop moving.

[0059] Preferably, the pressing plate assembly 300 is hinged to the fixed hinge seat 130, and a number of magnetic strips 320 are provided on the circumference of the fourth through hole 310 of the pressing plate assembly 300 so that the pressing plate assembly 300 can be attracted to the upper cover plate 120 to clamp the fabric.

[0060] In this embodiment, the right end of the pressing plate assembly 300 is rotatably connected to the fixed hinge seat 130, and a magnetic strip 320 is provided around the fourth through hole 310. The magnetic strip 320 can be attracted to the upper cover plate 120 when the pressing plate assembly 300 presses the fabric, which can increase the clamping force and prevent the fabric from moving relative to the upper cover plate 120.

[0061] In summary, this application provides a bag opening size adjustment device, which includes a pressing plate assembly 300, an upper cover plate 120, a fixed hinge seat 130, a cylinder (electric cylinder), a connecting plate 410, a mounting base plate 110, a left pad plate 140, a right pad plate 150, a left rack plate 242, a left adjusting plate 241, a gear set, a rear rack plate 232, a rear adjusting plate 23112, a pressure plate, a right rack plate 252, a right adjusting plate 251, a front adjusting plate 221, and a front rack plate 222, etc. When in use, this device is installed on a template machine, with the cut piece placed in the middle bag opening area. The upper cover plate 120 and the mounting base plate 110 connect and fix the internal structure of the entire device. The pressing plate assembly 300 is used to press down the cut piece and is installed on the fixed hinge seat 130 together with the cylinder (electric cylinder). The fixed hinge seat 130 and... The mounting base plate 110 is fixedly installed on the template machine. A connecting plate 410 connects the cylinder (electric cylinder) to the front rack plate 222, driving a rack and pinion assembly consisting of the left rack plate 242, gear set, rear rack plate 232, right rack plate 252, and front rack plate 222. This allows for simultaneous movement in four directions: front, back, left, and right. The left adjusting plate 241, rear adjusting plate 231, right adjusting plate 251, and front adjusting plate 221 are fixed to their respective rack plates. The positions of these adjusting plates are adjusted according to the bag opening size requirements. After adjustment, a pressure plate locks each rack and corresponding adjusting plate in place. A padding plate arranges the left adjusting plate 241, right adjusting plate 251, rear adjusting plate 231, and front adjusting plate 221 in a staggered manner to accommodate various bag opening sizes. This device is installed on the template machine and used in conjunction with a bag folding device, bag pressing device, and feeding device to complete the bag opening sewing production.

[0062] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A bag opening size adjustment device, used for installation at the bag opening station of a template machine to fix the fabric and expose the opening area, characterized in that, include: A fabric placement platform (100) includes a mounting base plate (110) and an upper cover plate (120) that is connected to the upper side of the mounting base plate (110). The mounting base plate (110) has a first through hole in the middle, and the upper cover plate (120) has a second through hole corresponding to the first through hole. An adjustment plate assembly is movably installed between the mounting base plate (110) and the upper cover plate (120). The adjustment plate assembly has a third through hole (210) in the middle for connecting the first through hole and the second through hole. The adjustment plate assembly can be moved to adjust the size of the third through hole (210). A pressing plate assembly (300) is rotatably connected to the fabric placement platform (100). The pressing plate assembly (300) is used to press the fabric to be opened onto the fabric placement platform (100). A fourth through hole (310) communicating with the third through hole (210) is provided in the middle of the pressing plate assembly (300).

2. The bag opening size adjustment device according to claim 1, characterized in that, The adjusting plate assembly includes: a front adjusting plate (221) group and a rear adjusting plate (231) group arranged opposite to each other, and a left adjusting plate (241) group and a right adjusting plate (251) group arranged opposite to each other. The front adjusting plate (221) group, the rear adjusting plate (231) group, the left adjusting plate (241) group and the right adjusting plate (251) group form the third through hole (210). The front adjusting plate (221) group and the rear adjusting plate (231) group are movable relative to each other in a first direction, and the left adjusting plate (241) group and the right adjusting plate (251) group are movable relative to each other in a second direction.

3. The bag opening size adjustment device according to claim 2, characterized in that, The front adjustment plate (221) group, the rear adjustment plate (231) group, the left adjustment plate (241) group, and the right adjustment plate (251) group are connected by transmission, and the four can move closer or further away synchronously to adjust the size of the third through hole (210). One of the front adjustment plate (221) group, the rear adjustment plate (231) group, the left adjustment plate (241) group, and the right adjustment plate (251) group is connected to the drive source (400), and the drive source (400) is hinged to the fixed hinge seat (130) provided at the end of the fabric placement platform (100).

4. The bag opening size adjustment device according to claim 3, characterized in that, The drive source (400) is specifically a cylinder or a hydraulic cylinder, and the movable shaft end of the drive source (400) is connected to the front adjusting plate (221) group through a connecting plate (410).

5. The bag opening size adjustment device according to claim 3, characterized in that, The front adjustment plate (221) group and the rear adjustment plate (231) group are arranged on the same plane, the left adjustment plate (241) group and the right adjustment plate (251) group are arranged on the same plane, and a left pad plate (140) and a right pad plate (150) are respectively laid between the left adjustment plate (241) group, the right adjustment plate (251) group and the mounting base plate (110), so that they are staggered with the front adjustment plate (221) group and the rear adjustment plate (231) group in a direction perpendicular to the mounting base plate (110).

6. The bag opening size adjustment device according to claim 5, characterized in that, It also includes a gear set, which includes a first drive gear (510) and a second drive gear (520) disposed on the left pad (140), and a third drive gear (530) and a fourth drive gear (540) disposed on the right pad (150). The first drive gear (510), the second drive gear (520), the third drive gear (530) and the fourth drive gear (540) are arranged in a square shape. The first drive gear (510) links the front adjustment plate (221) group and the left adjustment plate (241) group; the second drive gear (520) links the left adjustment plate (241) group and the rear adjustment plate (231) group; the third drive gear (530) links the rear adjustment plate (231) group and the right adjustment plate (251) group; and the fourth drive gear (540) links the right adjustment plate (251) group and the front adjustment plate (221) group.

7. The bag opening size adjustment device according to claim 6, characterized in that, The front adjusting plate (221) group includes a front adjusting plate (221) and a front rack plate (222) that are detachably connected. The rear adjusting plate (231) group includes a rear adjusting plate (231) and a rear rack plate (232) that are detachably connected. The left adjusting plate (241) group includes a left adjusting plate (241) and a left rack plate (242) that are detachably connected. The right adjusting plate (251) group includes a right adjusting plate (251) and a right rack plate (252) that are detachably connected. The front rack plate (222), the rear rack plate (232), the left rack plate (242), and the right rack plate (252) are all provided with rack segments (260) that mesh with the gear set.

8. The bag opening size adjustment device according to claim 7, characterized in that, The front adjustment plate (221) group, the rear adjustment plate (231) group, the left adjustment plate (241) group, and the right adjustment plate (251) group all include a pressure plate (270), which is used to fix the front adjustment plate (221) and the front rack plate (222), the rear adjustment plate (231) and the rear rack plate (232), the left adjustment plate (241) and the left rack plate (242), and the right adjustment plate (251) and the right rack plate (252).

9. The bag opening size adjustment device according to claim 7, characterized in that, The front rack plate (222) is provided with a limiting groove (223) near the end of the rear adjusting plate (231) group, and the rear rack plate (232) is provided with a limiting protrusion (233) that cooperates with the limiting groove (223) on the side near the front adjusting plate (221) group.

10. The bag opening size adjustment device according to claim 3, characterized in that, The pressing plate assembly (300) is hinged to the fixed hinge seat (130). The pressing plate assembly (300) is provided with several magnetic strips (320) at the circumference of the fourth through hole (310) so that the pressing plate assembly (300) can be attracted to the upper cover plate (120) to clamp the fabric.

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