Clamping mechanism for double needle seam and sewing apparatus

Abstract

The utility model discloses a kind of material clamping mechanism and sewing equipment for double needle joint, material clamping mechanism is applied to the below of turnover plate mechanism, the turnover plate mechanism includes left side plate, right side plate, the left side plate and the right side plate can be turned upside down around a shaft body, gap is formed between the right side of the left side plate and the left side of the right side plate;The material clamping mechanism includes automatic clamping unit and the automatic rotating swing unit of driving the automatic clamping unit rotating swing, the automatic clamping unit is used to clamp the material piece sewing edge passing through the gap downwards, the automatic rotating swing unit drives the automatic clamping unit rotating swing to fold the material piece sewing edge upwards.Such, clamping positioning is carried out from the lower end of workpiece, it is favorable to the center positioning of cloth whole, help to improve the accuracy of material supporting, simultaneously, material clamping mechanism can fold the material piece sewing edge, flatness is better, it is favorable to subsequent double needle joint processing quality.

Description

Technical Field

[0001] This utility model relates to the field of sewing technology, and in particular to a clamping mechanism and sewing equipment for double-needle stitching. Background Technology

[0002] Reference Figure 7 and Figure 8 As shown, taking a baseball cap as an example, its crown is formed by sewing together several adjacent cap pieces A1 to create a hemispherical crown. In actual sewing, two adjacent cap pieces A1 are overlapped and sewn on one side. Then, the two cap pieces A1 are turned outwards from the center seam A2 as a reference. The presser foot needs to be placed on top of the two cap pieces A1 after they are turned out, and double needle sewing is performed on both sides of the center seam A2. During sewing, a side strip A3 is placed on the inside of the cap piece A1. The side strip covers the center seam A2 of the two cap pieces A1. The two sides of the side strip A3 form a sewing track A4 with the corresponding positions of the two cap pieces A1's center seam A2.

[0003] CN113235233A discloses a page-turning component in an automated cap-making production line, including a mounting base, a page-turning assembly, two sets of drive assemblies, a translation assembly, and an angle adjustment assembly. The page-turning assembly is correspondingly mounted on the top of the mounting base. The two sets of drive assemblies are matched and mounted on the side walls of the mounting base, and the output end of the drive assemblies is pulsatorically connected to the page-turning assembly. The angle adjustment assembly is mounted on the lower surface of the mounting base, and the translation assembly is matched and mounted on the lower surface of the angle adjustment assembly. In use, after the fabric is conveyed, it falls onto the left and right side plates. The left and right side plates are used to collect the fabric, and the operator uses an electrically controlled cylinder, driven by a connecting component, to clamp and open the left and right side plates.

[0004] This structure has some limitations and shortcomings: when the fabric falls on the left and right side panels, the fabric position is prone to deviation. When the left and right side panels are flipped and clamped, the fabric is more likely to shift, affecting the quality of double-needle stitching.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a clamping mechanism and sewing equipment for double-needle stitching. It clamps and positions the workpiece from the bottom, which is beneficial to the overall centering and positioning of the fabric and helps to improve the accuracy of the material support. At the same time, the clamping mechanism can fold the sewing edge of the material, resulting in better flatness and improving the quality of subsequent double-needle stitching.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A clamping mechanism for double-needle stitching is applied below a flipping mechanism, the flipping mechanism including a left side plate and a right side plate, the left side plate and the right side plate being able to flip up and down around an axis, and a gap being formed between the right side of the left side plate and the left side of the right side plate.

[0009] The clamping mechanism includes an automatic clamping unit and an automatic rotating swinging unit that drives the automatic clamping unit to rotate and swing. The automatic clamping unit is used to clamp the sewing edge of the material sheet passing downward through the gap, and the automatic rotating swinging unit drives the automatic clamping unit to rotate and swing to fold the sewing edge of the material sheet upward.

[0010] As a preferred embodiment, the automatic clamping unit includes a clamping cylinder connected to a pair of clamps that open and close along the X-axis for clamping the sewing edge of the material sheet.

[0011] As a preferred embodiment, the automatic rotating swing unit includes a flat-push cylinder; the clamping cylinder is mounted on a cylinder seat, and the cylinder seat is respectively provided with a connecting shaft and a connecting crank; the telescopic rod of the flat-push cylinder is connected to the connecting shaft through a fisheye joint, the fisheye joint is rotatable relative to the connecting shaft, and the upper end of the connecting crank is provided with a shaft hole extending along the Y-axis.

[0012] As a preferred embodiment, the shaft hole is rotatably fitted onto the shaft body.

[0013] As a preferred embodiment, the shaft hole is rotatably fitted onto another shaft parallel to the shaft body.

[0014] As a preferred embodiment, the flipping mechanism is provided with a feeding guide panel facing the head end of the sewing machine, and the feeding guide panel has a guide groove extending along the Y-axis, which is directly opposite to the gap.

[0015] As a preferred embodiment, a retaining groove is provided through the bottom of the guide groove to keep the folded edge in position.

[0016] As a preferred embodiment, the left side plate and the right side plate are driven by a motor to flip up and down;

[0017] Alternatively: the left side plate and the right side plate are driven by a cylinder to flip up and down.

[0018] As a preferred embodiment, a pair of clamps that open and close along the X-axis, one clamp having an X-axis guide plate extending horizontally toward the bottom of the other clamp, the bottom of the other clamp being located above the X-axis guide plate, and during the opening and closing action, the bottom of the other clamp being displaced relative to the X-axis guide plate.

[0019] A sewing device employing a clamping mechanism for double-needle stitching as described in any of the preceding claims.

[0020] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly sets up a clamping mechanism below the flipping mechanism. The clamping mechanism includes an automatic clamping unit and an automatic rotating swinging unit that drives the automatic clamping unit to rotate and swing. The automatic clamping unit is used to clamp the sewing edge of the material sheet that passes downward through the gap between the right side of the left side plate and the left side of the right side plate. The automatic rotating swinging unit drives the automatic clamping unit to rotate and swing to fold the sewing edge of the material sheet upward. In this way, it clamps and positions the workpiece from the bottom, which is conducive to the overall centering and positioning of the fabric and helps to improve the accuracy of the material support. At the same time, the clamping mechanism can fold the sewing edge of the material sheet, resulting in better flatness and benefiting the quality of subsequent double-needle stitching.

[0021] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0023] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0024] Figure 3 This is another exploded view of an embodiment of the present utility model;

[0025] Figure 4 This is a perspective view of the clamping mechanism according to an embodiment of the present utility model;

[0026] Figure 5 This is another perspective view of the clamping mechanism according to an embodiment of the present utility model;

[0027] Figure 6 This is a structural diagram illustrating an embodiment of the present invention applied to a double-needle stitching machine;

[0028] Figure 7 This is a structural diagram of a baseball cap;

[0029] Figure 8 This is another structural illustration of a baseball cap. Detailed Implementation

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., 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 device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] A clamping mechanism for double-needle stitching is applied below a flipping mechanism. The flipping mechanism includes a left side plate 401 and a right side plate 402, which can flip up and down around an axis 403. The left side plate 401 and the right side plate 402 are driven to flip up and down by a motor, or by a cylinder. A gap 2 is formed between the right side of the left side plate 401 and the left side of the right side plate 402. The clamping mechanism is located below the gap 2 and includes an automatic clamping unit and an automatic rotating swinging unit that drives the automatic clamping unit to rotate and swing. The automatic clamping unit is used to clamp the sewing edge of the material sheet passing downward through the gap 2, and the automatic rotating swinging unit drives the automatic clamping unit to rotate and swing to fold the sewing edge of the material sheet upward.

[0032] A sewing device employing a clamping mechanism as described above for double-needle stitching.

[0033] Please refer to Figures 1 to 6 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0034] This embodiment includes a left side plate 401 and a right side plate 402, which can be flipped up and down around an axis 403. It also includes a first motor 41 for driving the left side plate 401 to flip up and down and a second motor 42 for driving the right side plate 402 to flip up and down. The axis 403 is mounted on a flip plate base 40, and a first support 4001 and a second support 4002 are provided on the flip plate base 40 to support the two ends of the axis 403.

[0035] The first motor 41 is connected to a first drive wheel 411, a first transmission wheel 412 and a first synchronous belt 413; the first drive wheel 411 is connected to the first motor 41, the first transmission wheel 412 is rotatably sleeved on the shaft 403 and connected to the left side plate 401, and the first synchronous belt 413 is connected between the first drive wheel 411 and the first transmission wheel 412.

[0036] The second motor 42 is connected to a second drive wheel 421, a second transmission wheel 422 and a second synchronous belt 423; the second drive wheel 421 is connected to the second motor 42, the second transmission wheel 422 is rotatably sleeved on the shaft 403 and connected to the right side plate 402, and the second synchronous belt 423 is connected between the second drive wheel 421 and the second transmission wheel 422.

[0037] In the material feeding state, the left side plate 401 is vertically positioned upwards, and the right side plate 402 is horizontally positioned. Two single-sided sewn material pieces (such as cap pieces) are placed flat on the right side plate 402, and the vertically positioned left side plate 401 can be used as a placement and positioning reference. Typically, a workpiece sensing unit is provided below the right side plate 402, and correspondingly, a sensing hole is provided on the right side plate 402. When the workpiece sensing unit senses that the workpiece is placed on the right side plate 402 in place (the material piece covers the sensing hole), the second motor 42 drives the right side plate 402 to flip upwards.

[0038] When the material is clamped, the right side plate 402 flips upward to switch from a horizontal state to a vertical stack on the right side of the left side plate 401. At this time, the cap is clamped between the left side plate 401 and the right side plate 402.

[0039] In the pre-supported state, the left side plate 401 and the right side plate 402 are flipped downwards away from each other at an angle of 20-60 degrees, and both extend obliquely above the shaft 403 to form a V-shape; at this time, the two caps are respectively attached to the left side plate 401 and the right side plate 402, and open into a V-shape as the left side plate 401 and the right side plate 402 are flipped downwards;

[0040] In the supporting state, the left side plate 401 and the right side plate 402 continue to flip downwards away from each other until both are in a horizontal state. In this stage, a supporting mechanism is usually configured to press down on the material sheet and spread the two material sheets to the left and right. In the supporting state, the vacuum adsorption unit 411 releases the adsorption effect on the material sheet (or the piercing positioning unit releases the piercing positioning of the material sheet). Therefore, during the process of the left side plate 401 and the right side plate 402 continuing to flip downwards away from each other to a horizontal state, the material sheet will not flip with the left side plate 401 and the right side plate 402.

[0041] Subsequently, it is once again in the waiting state, i.e. the feeding state, and the left side plate 401 flips upward to switch from the horizontal state to the vertical state.

[0042] In this embodiment, the left side plate 401 is connected to a first ring portion 4011, and one end of the first transmission wheel 412 extends axially with a first extended portion. The first ring portion 4011 is sleeved on the first extended portion and fixedly connected. The first extended portion can be designed as a cylinder with an irregular cross-section on its circumference. The irregular cross-section refers to, for example, having two or more inclined surfaces on the circumference, preferably arranged at uniform intervals along the circumference. An internal threaded hole is provided on the first ring portion 4011, and a screw is inserted into the internal threaded hole with its inner end abutting against the inclined surface, thereby achieving mutual fixation between the first ring portion 4011 and the first extended portion. The left side plate 401 is also connected to a second ring portion 4012, and a first bearing is sleeved on the shaft 403. The second ring portion 4012 is sleeved on the first bearing.

[0043] In this embodiment, the right side plate 402 is connected to a third ring portion 4021, and one end of the second transmission wheel 422 extends axially with a second extended portion. The third ring portion 4021 is sleeved on the second extended portion and fixedly connected. Similarly, the second extended portion can be designed as a cylinder with an irregular cross-section on its circumference. The irregular cross-section refers to, for example, having two or more inclined surfaces on the circumference, preferably arranged at uniform intervals along the circumference. An internal threaded hole is provided on the third ring portion 4021, and a screw is inserted into the internal threaded hole with its inner end abutting against the inclined surface, thereby achieving mutual fixation between the third ring portion 4021 and the second extended portion. The right side plate 402 is also connected to a fourth ring portion 4022, and a second bearing is sleeved on the shaft 403. The fourth ring portion 4022 is sleeved on the second bearing.

[0044] Both the left side plate 401 and the right side plate 402 are provided with vacuum adsorption units 411 for adsorbing the sheet; or, both the left side plate 401 and the right side plate 402 are provided with puncture positioning units for piercing the sheet.

[0045] The shaft 403, facing the sewing machine head 50, is connected to a clamping mechanism that tilts / arcically folds the sewing edge between two pieces of fabric upwards. The clamping mechanism includes a clamping cylinder 43 and a pushing cylinder 44. The clamping cylinder 43 is connected to a pair of clamps 431 that open and close along the X-axis, used to clamp the sewing edge between the two pieces of fabric. The pushing cylinder 44 is connected to the clamping cylinder 43 to drive the clamping cylinder 43 to swing and displace. One of the clamps has an X-axis guide plate extending horizontally towards the bottom of the other clamp. The bottom of the other clamp is located above the X-axis guide plate. During the opening and closing action, the bottom of the other clamp displaces relative to the X-axis guide plate. The clamping cylinder 43 is mounted on a cylinder seat 4301. The cylinder seat 4301 is provided with a connecting shaft 4302 and a connecting crank 4303. The telescopic rod of the flat-push cylinder 44 is connected to the connecting shaft 4302 via a fisheye connector. The fisheye connector is rotatable relative to the connecting shaft 4302. The upper end of the connecting crank 4303 has a shaft hole, which is rotatably fitted onto the end of the shaft 403 facing the sewing machine head 50. The end of the shaft 403 facing the sewing machine head 50 extends beyond the outer end of the second upright 4002. Alternatively, the shaft hole can be rotatably fitted onto another shaft parallel to the shaft. In use, when the clamp grips the middle sewing edge of two pieces of material, the flat-push cylinder 44 drives the clamping cylinder 45 to swing and displace, causing the middle sewing edge of the two pieces of material to be pushed down from a vertically downward position.

[0046] The flipping mechanism has a feeding guide panel A facing the sewing machine head 50. The feeding guide panel A has a guide groove 1 extending along the Y-axis, which is directly opposite the gap 2. A retaining groove is provided below the guide groove 1 to hold and position the folded edge. The width of the retaining groove along the X-axis is slightly wider than that of the guide groove 1.

[0047] Furthermore, a clamping mechanism is provided below the left and right side plates. The clamping mechanism includes a flip-clamping cylinder 47 and two clamps 48 driven by the flip-clamping cylinder 47 to open and close. The two clamps are defined as the first clamp and the second clamp, respectively. In the clamping state, the flip-clamping cylinder drives the first clamp and the second clamp to flip upward and move closer to further clamp the left and right side plates. After the clamping mechanism further clamps, the vacuum adsorption unit is controlled to pick up the sheet (or the piercing positioning unit is controlled to pierce the sheet), which improves the positioning firmness of the left and right side plates on the attached sheet, so that the sheet can be accurately flipped open with the left and right side plates. Then, it flips downward and moves away to reset.

[0048] The key design feature of this invention is the inclusion of a clamping mechanism located below the flip-plate mechanism. This clamping mechanism comprises an automatic clamping unit and an automatic rotating swinging unit that drives the automatic clamping unit to rotate and swing. The automatic clamping unit clamps the sewing edge of the fabric piece that passes downward through the gap between the right side of the left side plate and the left side of the right side plate. The automatic rotating swinging unit drives the automatic clamping unit to rotate and swing, folding the sewing edge of the fabric piece upward. This clamping and positioning from the bottom of the workpiece facilitates the overall centering and positioning of the fabric, improving the accuracy of the material support. Simultaneously, the clamping mechanism folds the sewing edge of the fabric piece, resulting in better flatness and improving the quality of subsequent double-needle stitching.

[0049] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A clamping mechanism for double-needle stitching, characterized in that, It is applied below a flip-plate mechanism, which includes a left side plate and a right side plate. The left side plate and the right side plate can flip up and down around an axis, and a gap is formed between the right side of the left side plate and the left side of the right side plate. The clamping mechanism includes an automatic clamping unit and an automatic rotating swinging unit that drives the automatic clamping unit to rotate and swing. The automatic clamping unit is used to clamp the sewing edge of the material sheet passing downward through the gap, and the automatic rotating swinging unit drives the automatic clamping unit to rotate and swing to fold the sewing edge of the material sheet upward.

2. The clamping mechanism for double-needle stitching according to claim 1, characterized in that, The automatic clamping unit includes a clamping cylinder connected to a pair of clamps that open and close along the X-axis, used to clamp the sewing edge of the material sheet.

3. The clamping mechanism for double-needle stitching according to claim 2, characterized in that, The automatic rotating swing unit includes a flat-push cylinder; the clamping cylinder is mounted on a cylinder seat, and the cylinder seat is respectively provided with a connecting shaft and a connecting crank. The telescopic rod of the flat-push cylinder is connected to the connecting shaft through a fisheye joint. The fisheye joint is rotatable relative to the connecting shaft. The upper end of the connecting crank is provided with a shaft hole that runs through the Y-axis.

4. The clamping mechanism for double-needle stitching according to claim 3, characterized in that, The shaft hole is rotatably fitted onto the shaft body.

5. The clamping mechanism for double-needle stitching according to claim 3, characterized in that, The shaft hole is rotatably fitted onto another shaft parallel to the shaft body.

6. The clamping mechanism for double-needle stitching according to claim 1, characterized in that, The flipping mechanism is provided with a feeding guide panel facing the head end of the sewing machine. The feeding guide panel has a guide groove extending along the Y-axis, and the guide groove is directly opposite to the gap.

7. The clamping mechanism for double-needle stitching according to claim 6, characterized in that, A retaining groove is provided below the guide groove to keep the folded edge in position.

8. The clamping mechanism for double-needle stitching according to claim 1, characterized in that, The left and right side plates are driven by a motor to flip up and down. Alternatively: the left side plate and the right side plate are driven by a cylinder to flip up and down.

9. The clamping mechanism for double-needle stitching according to claim 2, characterized in that, A pair of clamps that open and close along the X-axis, one clamp having an X-axis guide plate extending horizontally toward the bottom of the other clamp, the bottom of the other clamp being located above the X-axis guide plate, and during the opening and closing action, the bottom of the other clamp being displaced relative to the X-axis guide plate.

10. A sewing device, characterized in that, The application includes a clamping mechanism for double-needle stitching as described in any one of claims 1 to 9.

Images