DEVICE FOR QUICK CHANGING THE PATTERN EJECTION PLATE OF A SEWING MACHINE AND SEWING MACHINE INCORPORATING SAID DEVICE

Abstract

 A device for quick changing the pattern ejection plate (10) of a sewing machine comprising a frame (1), a first group of gripper rollers (2) for securely fixing a pattern ejection plate under an opening structure (9) for sewing operation; a pattern transport mechanism (3) mounted on the frame (1) and located on the opposite side of the sewing head (8) of the sewing plate. This pattern transport mechanism (3) includes a first and second transport sections (31, 32) that carry the pattern ejection plate (10), a lifting component (33) and a first pattern change transport component (34). There is also a material receiving drive component (4), which is adapted to move the opening structure (9) back and forth between the first transport section (31) and the sewing head (8), and a second pattern change transport component (5), which is adapted to move the pattern ejection plate (10) to the second transport section (32). Thanks to the cooperation of these mechanisms, the pattern ejection plate (10) can be changed continuously, clamp pick-up and transport operations can be carried out quickly and easily.

Description

Technical field

[0001] The present invention relates to the technical field of garment processing machinery equipment, and more particularly to a device for quick changing the pattern ejection plate of a sewing machine.

Background art

[0002] Currently, most garments involve the processing of parts such as pockets, placket, etc. to enhance their functionality or aesthetic appearance. Taking pocket processing as an example, the common method of the current pocket processing process is to use a pocket opening machine for automatic processing. The general working steps are as follows: First, a pocket opening is formed on the fabric, then structures such as the pocket opening and the pocket opening zipper, which have been processed separately in advance, are sewn into the pocket opening, thereby completing the pocket processing.

[0003] When processing the pocket opening, it is necessary to fix the pocket opening position of the garment, cut it, move it to the pocket opening after the cutting is completed, and perform the pocket folding process. After that, it is placed on the pocket opening and shaped, and finally moved to the sewing position and sewn. During this operation, when changing the workstation, it is necessary to place a support plate to support the fabric, the pocket opening and the zipper on the processing table, so that these structures can be moved along the processing table.

[0004] Chinese utility model CN217298233U describes a pattern support board changing device. In this technical solution, the gripper component of the opening structure is reciprocated by the X-axis drive mechanism, and then the pattern support board is picked up and replaced by the overall elevation of the opening structure. Although this system can achieve automatic replacement of the pattern support sheet, due to the overall elevation of the opening structure, large pieces of fabric placed on the opening structure can be displaced, which may adversely affect the quality of subsequent sewing processes.

[0005] Considering the disadvantages of the above-mentioned existing technology, the purpose of the present patent is to provide a sewing machine and a pattern ejection plate quick-change mechanism. This mechanism enables the pattern ejection plate to be replaced continuously and quickly, improving production efficiency and ensuring that the quality of the stitches is not affected.

Summary of the invention

[0006] The subject matter of the present invention is a device for quick changing the pattern ejection plate (10) of a sewing machine as defined in the appended claims.

[0007] The device comprises a frame (1); a first group of gripper rollers (2) positioned under the opening structure (9) of the sewing equipment and used to firmly fix a pattern ejection plate (10) under the opening structure (9); a pattern transport mechanism (3) mounted on the frame (1) and located on the opposite side of the sewing head (8) of the sewing equipment, comprising the following components: first and second transport sections (31, 32) for carrying a pattern ejection plate (10), a lifting component (33) for supporting a pattern ejection plate (10) in the first transport section (31) and providing a lifting movement for gripping the first group of gripper rollers (2), and a first pattern change transport component (34) for moving a pattern ejection plate (10) from the first transport section (31) to the second transport section (32); a material receiving drive component (4) mounted on the frame (1), used to move the opening structure (9) back and forth between the first transport section (31) and the sewing head (8); and a second pattern transport drive component (55), which is reciprocally positioned on the opening structure (9) and the first group of gripper rollers (2), and is used to transport the pattern ejection plate (10) to the second transport section (32).

[0008] To implement this technical solution, during the sewing process of parts such as flaps and pockets, large cut pieces are placed in the opening structure (9) and processes such as laser cutting and hemming are performed. Materials such as pocket opening, upper pocket opening are placed on the pattern ejection plate (10) in the second material receiving drive component (4). When the laser cutting and hemming operations are completed, the first pattern change transport component (34) clamps the pattern ejection plate (10) in the second transport section (32) and transports it to the first transport section (31). At the same time, the material receiving drive component (4) moves the opening structure (9) onto the first material transport section (31). Then, the lifting component (33) raises the pattern ejection plate (10) so that it adheres to the lower part of the opening structure (9), so that the first group of gripper rollers (2) firmly fixes the pattern ejection plate (10) and moves it to the sewing head (8) to perform the sewing operation.

[0009] During the sewing process, the operator may place materials, such as a bottom pocket opening, on another pattern ejection plate (10) in the second transport section (32). The lifting component (33) resets and the first pattern change transport component (34) clamps the pattern ejection plate (10) and moves it to the first transport section (31). After the sewing is then completed, the second pattern change transport component (5) clamps the pattern ejection plate (10) downwards under the opening structure (9). The first group of gripper rollers (2) is released and the material receiving drive component (4) moves the opening structure (9) back onto the first transport section (31).

[0010] Simultaneously, the second pattern change transport component (5) moves the previous pattern ejection plate (10) onto the second transport section (32) and places the pattern ejection plate (10) on the second transport section (32). The lifting component (33) raises the pattern ejection plate (10) so that it again adheres to the bottom of the opening structure (9). The first group of gripper rollers (2) secures the pattern ejection plate (10) firmly again and it is transported to the sewing head (8) for sewing.

[0011] Concurrently, the operator can reposition the pattern ejection plate (10), such as the pocket mouth, upper pocket mouth, etc., in the second transport section (32). The lifting component (33) returns to its original position and the first pattern changing transport component (34) clamps the pattern ejection plate (10) again and transports it to the first transport section (31). After completion of the sewing, the second pattern change transport component (5) clamps the pattern ejection plate (10) under the opening structure (9) downwards again. The first group of gripper rollers (2) is released and the material receiving drive component (4) moves the opening structure (9) back above the first transport section (31). At the same time, the second pattern transport drive component (56) moves the previous pattern ejection plate (10) to the top of the second transport section (32) and places the pattern ejection plate (10) on the second transport section (32). The operator removes the sewn material, the opening structure (9) returns to its original position, and the new large cutting part is inserted and the laser cutting, hemming, etc. are performed again.

[0012] Thanks to the harmonious cooperation of the various components, the pattern ejection plate (10) can be changed continuously and clamping, removal and conveying operations are performed quickly and easily. This enables continuous machining, effectively increasing machining efficiency. Furthermore, since the entire opening structure does not need to be raised, negative effects such as reduced sewing quality due to the displacement of large cut pieces are reduced. The lifting component (33) and the material receiving drive component (4) can work synchronously, without affecting each other, which further improves work efficiency.

[0013] In a preferred implementation, the lifting component (33) includes: A lifting panel (331), slidably coupled to the frame (1) for carrying the pattern ejection plate (10), and a lifting cylinder (332) fixed to the frame (1) for moving the lifting panel (331) up and down.

[0014] To perform this technical operation, the lifting cylinder (332) moves the lifting panel (331) upward, which synchronously moves the pattern ejection plate (10) upward and facilitates the first group of gripper rollers (2) to firmly fix the pattern ejection plate (10).

[0015] In a preferred embodiment, the first pattern change transport component (34) includes: A pattern change mounting frame (341) slidably mounted to the frame (1), a pattern clamping cylinder (342) secured to the pattern change mounting frame (341), and a first pattern transport drive component (343) adapted to move the pattern change mounting frame (341) back and forth between the first transport section (31) and the second transport section (32).

[0016] To implement this technical solution, after the pattern clamping cylinder (342) firmly fixes the pattern ejection plate (10), the first pattern change transport component (34) moves the pattern change mounting frame (341), thus enabling the pattern ejection plate (10) to be transported.

[0017] In a preferred embodiment, a clamping seat (344) corresponding to the gripping portion of the pattern clamping cylinder (342) is slidably connected on the pattern change mounting frame (341). The pattern clamping cylinder (342) is fixed to this clamping seat (344), and a floating elastic part (345) is provided between the pattern changing mounting frame (341) and the clamping seat (344).

[0018] To implement the above technical solution, by adjusting the floating elastic part (345), the pattern clamping cylinder (342) has a certain floating area. This avoids overlapping with the pattern clamping cylinder (342) when the lifting cylinder (332) moves the lifting panel (331) up.

[0019] In a preferred implementation, the second transport section (32) includes a positioning component (6). This positioning component (6) includes a positioning cylinder (61) fixed to the frame (1) and a piston rod fixed to the positioning cylinder (61), and a positioning pin (62) compatible with the positioning pin in the pattern ejection plate (10).

[0020] In order to perform the above technical operation, the positioning cylinder (61) moves the positioning pin (62) upwards, thereby enabling positioning of the pattern ejection plate (10) in the second transport section (32). This increases the conveying accuracy of the pattern ejection plate (10). When the first pattern transport drive component (343) moves the pattern ejection plate (10), the positioning cylinder (61) performs this operation by removing the positioning pin (62) from the positioning hole (101).

[0021] In a preferred implementation, the second pattern transport drive component (56) includes: a transport frame (51) fixed to the opening structure (9), a transport support (52) slidably mounted to the transport frame (51), a pick and carry plate (53) slidably mounted to the transport support (52) in a vertical direction, a pick and carry roller (54) fixed to the transport support (52) for reciprocating the pick and carry plate (53), a second group of gripper rollers (55) disposed on the drive plate for grasping the pattern ejection plate (10), and the second pattern transport drive component (56) adapted for reciprocating the transport frame (51).

[0022] To implement this technical solution, after the sewing is completed, the drive roller moves the pick and carry plate (53) down so that the second group of gripper rollers (55) grips the pattern ejection plate (10) and holds it firmly. After the first group of gripper rollers (2) is released, the second pattern transport drive component (56) moves the pick and carry plate (53) to transport the pattern ejection plate (10) to the second transport section (32).

[0023] In a preferred embodiment, the first pattern change transport component (34), the material receiving drive component (4), and the second pattern transport drive component (56) may be selected from the following components alone or in combination: ball screw drive component, belt drive component or gear and rack drive component.

[0024] In a preferred embodiment, the first transport section (31) is provided with an auxiliary correction component (7). This auxiliary correction component (7) comprises a correction cylinder (71) fixed to the frame (1) and a positioning column (72) with a piston rod fixed to the correction cylinder (71). The lifting panel (331) has a hole (333) through which the positioning column (72) can pass, and the positioning column (72) adapts to the correction hole (104) in the pattern ejection plate (10).

[0025] To implement this technical solution, when the pattern ejection plate (10) is moved from the second transport section (32) to the first transport section (31), the correction cylinder (71) moves the positioning column (72) upward to position it in the correction hole (104) in the pattern ejection plate (10). Thus, the positioning of the pattern ejection plate (10) is achieved and the precision of the pattern conveying is further optimized.

[0026] In another aspect, this patent concerns a sewing machine comprising a sewing head, the opening structure (9) and the quick-change mechanism of the pattern ejection plate (10) in any embodiment mentioned above. The material receiving drive component (4) is connected to the opening structure (9) and the sewing head (8) is positioned against the pattern transport mechanism (3).

[0027] In a preferred embodiment, the deployment structure comprises the following: an ejection mounting frame (91) connected to the material receiving drive component (4), a main support plate (92) fixed to the lower part of the ejection mounting frame (91), an upper clamp plate (93) slidably mounted in a vertical direction on the ejection mounting frame (91), and a clamping drive component adapted to clamp the cut piece by moving the upper clamp plate (93). The first group of gripper rollers (2) is connected to the side of the main support plate (92) that is remote from the upper clamp plate (93), and the second pattern change transport component (5) is connected to the ejection mounting frame (91). To implement the above technical solution, the main support plate (92) is adapted to place and support large cutting parts. The upper clamp plate (93), driven by the clamping drive component, can firmly fix the large cutting pieces.

Brief description of drawings

[0028] 

FIG. 1: Perspective view of a sewing machine incorporating the invention.

FIG. 2: Bottom view of the same machine.

FIG. 3: A pattern ejection plate.

FIG. 4: Perspective view showing one side of a first pattern change transport component.

FIG. 5: perspective view showing the opposite side of same first pattern change transport component.

FIG. 6: Lifting component and auxiliary correction component.

FIG. 7: Positioning component.

FIG. 8: Second pattern change transport component.

FIG. 9: Opening structure.

Description of embodiments

[0029] Referring to the drawings of Figures 1 through Figure 9. Terms such as "top", "bottom", "left", "right", "center", "middle" and "one" used in this disclosure are used for ease of description only and are not intended to limit the scope of this patent.

[0030] Example 1. Refer to drawings Figure 1 to Figure 8. This useful new model provides a pattern ejection plate 10 quick-change mechanism. This mechanism includes: a frame (1), a first group of gripper rollers (2), a pattern transport mechanism (3), a material receiving drive mechanism, and a second pattern change transport component (5).

[0031] Specifically, the first group of gripper rollers (2) is arranged at the bottom of the opening structure (9) of the sewing equipment and is used to perform sewing operation by firmly fixing the pattern ejection plate (10) at the bottom of the opening structure (9). The first group of gripper rollers (2) comprises at least two first gripper rollers. The first gripper roller uses similar structures in the present technology. The pattern ejection plate (10) is provided with a first locking hole (102) which is compatible with the gripper portion of the first gripper cylinder. The gripper of the first gripper cylinder secures the pattern ejection plate (10) by engaging the first locking hole (102) and holding it firmly.

[0032] The pattern transport mechanism (3) is positioned on the frame (1) against the sewing head (8) of the sewing equipment. The pattern transport mechanism (3) includes: a first transport section (31) and a second transport section (32) for transporting the pattern ejection plate (10), a lifting component (33) for supporting the pattern ejection plate (10) in the first transport section (31) and providing lifting movement for gripping the first group of gripper rollers (2), and a first pattern change transport component (34) for transporting the pattern ejection plate (10) from the first transport section (31) to the second transport section (32).

[0033] In particular, the lifting component (33) includes the following: A lifting panel (331) slidably connected to the frame (1) for moving the pattern ejection plate (10), and a lifting cylinder (332) fixed to the frame (1) for moving the lifting panel (331) up and down. The lifting cylinder (332) moves the lifting panel (331) upwards, moving the pattern ejection plate (10) upwards in a synchronized way. This facilitates the first group of gripper rollers (2) to firmly fix the pattern ejection plate (10).

[0034] The first pattern change transport component (34) includes: the pattern change mounting frame (341) slidably mounted to the frame (1), the pattern clamping cylinder (342) fixed to the pattern change mounting frame (341), and the first pattern transport drive component (343) for reciprocating the pattern change mounting frame between the first transport section (31) and the second transport section (32). The first pattern transport drive component (343) may be selected from structures such as a ball screw drive component, a belt drive component or a gear and rack drive component, either alone or in combination. In this application example, the first pattern transport drive component (343) uses the belt drive component. In particular, the frame (1) comprises a pulley, a belt and a belt motor for rotating the belt. The belt extends from the first conveying section to the second conveying section. The pattern change mounting frame (341) is fixed to the belt with screws. The belt motor moves the belt by rotating the pulley by a certain amount so that the pattern changing mounting frame (341) moves back and forth between the first transport section (31) and the second transport section (32). After the pattern clamping cylinder (342) firmly secures the pattern ejection plate (10), the first pattern transport drive component (343) moves the pattern change mounting frame (341), thereby moving the pattern ejection plate (10).

[0035] On the pattern change mounting frame (341), a clamping seat (344) corresponding to the gripper portion of the pattern clamping cylinder (342) is movably connected. The pattern clamping cylinder (342) is fixed to the clamping seat (344). There is a floating elastic part (345) among the pattern change mounting slot and the clamping seat (344). By adjusting this floating elastic part (345), the pattern clamping cylinder (342) has a certain floating area and prevents it from interfering with the pattern clamping cylinder (342) when the lifting cylinder (332) moves on the lifting panel (331).

[0036] In addition, the second transport section (32) includes a positioning component (6). The positioning component (6) comprises: a positioning cylinder (61) fixed to the frame (1) and a positioning pin (62) fixed to the piston rod of the positioning cylinder (61) and conforming to the positioning hole (101) in the pattern ejection plate (10). The first transport section (31) also has a hole for the positioning pins (62) to pass through. By moving the positioning pin (62) upwards by the positioning roller (61), the positioning of the pattern ejection plate (10) in the second transport section (32) can be achieved, thereby increasing the conveying accuracy of the pattern ejection plate (10). When the first pattern transport drive component (343) moves the pattern ejection plate (10), this can be accomplished by the positioning roller (61) removing the positioning pin (62) from the positioning hole (101).

[0037] The material receiving drive component (4) is mounted on the frame (1) and is used to reciprocate the bag opening structure (9) between the first material conveying section (31) and the sewing head (8). The material receiving drive component (4) can be selected alone or in combination from the following structures ball screw drive component, belt drive component or gear rack drive component. In this application, the material receiving drive component (4) uses a ball screw drive component. Specifically, the frame (1) has a ball screw rotatably connected to it, and on the ball screw there is a ball screw housing connected to the bag opening structure (9). Also fixed to the frame (1) is a ball screw motor, which is used to rotate the ball screw. When the ball screw motor rotates the ball screw, it moves the ball screw housing back and forth, allowing the bag opening structure (9) to be transported.

[0038] The second pattern change transport component (5) is mounted on the bag opening structure (9) and is mutually disposed with the first group of gripper rollers (2). This component is used to receive the pattern ejection plate (10) and transport it to the second transport section (32). Specifically, the second pattern change transport component (5) comprises a transport frame (51) fixed to the bag opening structure (9), a transport support (52) slidably mounted to the transport frame (51), a pick and carry plate (53) slidably mounted in a vertical direction to the transport support (52), and receiving an pick and carry roller (54) fixed to the transport support (52) for reciprocating the receiving and transport support (52), a second group of gripper rollers (55) mounted on the drive plate for taking up the pattern ejection plate (10), and a second pattern transport drive component (56) for moving the transport frame (51) reciprocatingly.

[0039] The second pattern transport drive component (56) may also be selected from the following structures, alone or in combination: ball screw drive component, belt drive component or gear rack drive component. In this application, the second pattern transport drive component (56) uses a ball screw drive component. The second group of gripper rollers (55) includes at least two second gripper rollers. The second gripper roller has the same construction as the first gripper roller, and the pattern ejection plate (10) has a second locking hole (103) conforming to the gripper portion of the second gripper roller. The gripper of the second gripper roller engages the second locking hole (103) and holds it firmly, securing the pattern ejection plate (10).

[0040] After the sewing is completed, the pick and carry plate (53) is moved downward by means of the movement roller so that the second group of gripper rollers (55) engage with the pattern ejection plate (10) and hold it firmly. After the first group of gripper rollers (2) is released, the pick and carry plate (53) is moved by means of the second pattern transport drive component (56) to move the pattern ejection plate (10) to the second transport section (32).

[0041] In addition, an auxiliary correction component (7) is provided in the first transport section (31). The auxiliary correction component (7) comprises: a correction cylinder (71) fixed to the frame (1) and a positioning column (72) fixed to the piston rod of the correction cylinder (71). The lifting panel (331) has a hole (333) for the positioning column (72) to pass through. The positioning column (72) fits into the correction hole (104) in the pattern ejection plate (10). When the pattern ejection plate (10) is moved from the second transport section (32) to the first material conveying section (31), the correction roller (71) moves the positioning column (72) upwardly to engage the correction hole (104) in the pattern ejection plate (10), thereby correcting and positioning the pattern ejection plate (10), which further improves the precision of the pattern conveying.

[0042] In the process of sewing parts such as flaps and pockets, large cut pieces are placed in the bag opening structure (9) and operations such as laser cutting and hemming are performed. Materials such as pocket flap, upper pocket opening are placed on the pattern ejection plate (10) located in the second transport section (32). When the laser cutting and hemming operations are completed, the first pattern change transport component (34) firmly holds the pattern ejection plate (10) in the second transport section (32) and transports it to the first material transport section (31). At the same time, the material receiving drive component (4) moves the bag opening structure (9) onto the first material conveying section (31). Then, the lifting component (33) moves the pattern ejection plate (10) upwards so that it adheres to the lower part of the bag opening structure (9), so that the first group gripper roller (2) firmly holds and fixes the pattern ejection plate (10), after which it is transported to the sewing head (8) for sewing.

[0043] In the sewing process, the operator can place materials, such as a lower pocket opening, on the pattern ejection plate (10) in the second conveying section. The lifting component (33) returns to its original position and the first pattern changing transport component firmly grips the pattern ejection plate (10) and transports it to the first material transport section (31). After the sewing is completed, the second pattern change transport component (5) descends and firmly holds the pattern ejection plate (10) under the bag opening structure (9). The first group gripper cylinder (2) is released and the material receiving drive component (4) carries the bag opening structure (9) back onto the first transport section. At the same time, the second pattern change transport component (5) moves the previous pattern ejection plate (10) onto the second transport section and places the pattern ejection plate (10) on the second transport section. The lifting component (33) again moves the pattern ejection plate (10) upwards so that it attaches to the lower part of the bag opening structure (9). The first group of gripper rollers (2) operates again to firmly hold and secure the pattern ejection plate (10), which is then transported to the sewing head (8) for sewing.

[0044] Simultaneously, the operator can again place materials such as pocket flaps, upper pocket mouths, etc. on the pattern ejection plate (10) in the second transport section (32). The lifting component (33) returns to its original position and the first pattern changing transport component firmly holds the pattern ejection plate (10) and transports it to the first material transport section (31). After sewing is completed, the second pattern change transport component (5) descends again and firmly holds the pattern ejection plate (10) under the bag opening structure (9). The first group gripper cylinder (2) is released and the material receiving drive component (4) carries the bag opening structure (9) back onto the first conveying section. At the same time, the second pattern change transport component (5) moves the previous pattern ejection plate (10) onto the second transport section and places the pattern ejection plate (10) on the second transport section. The operator removes the sewn material, the bag opening structure (9) returns to its original position and the new large cutting piece is inserted and laser cutting, hemming, etc. are performed.

[0045] Through the harmonious cooperation of various mechanisms, the pattern ejection plate (10) can be continuously replaced, and holding, picking up and transporting operations can be performed quickly and easily. This allows for continuous processing and effectively improves processing efficiency. Furthermore, since the bag opening structure (9) does not need to move completely up and down, negative effects such as reduced sewing quality due to the displacement of large cut pieces are reduced. The lifting cylinder (332) and the material receiving drive component (4) can work synchronously and do not affect each other, which further improves work efficiency.

[0046] Example 2. A sewing equipment as shown in Figure 1 includes a sewing head (8), a bag opening structure (9) and a quick-change mechanism of the pattern ejection plate (10) of the first application example. The material receiving drive component (4) is connected to the bag opening structure (9). The sewing head (8) is mutually positioned with the pattern transport mechanism (3). The sewing equipment in this application may be automatic sewing equipment, such as automatic bag opening machine, automatic pocket sealing machine, automatic capping machine, automatic template sewing machine, etc.

[0047] As shown in Figure 9, the bag opening structure (9) comprises a bag ejection mounting frame (91) connected to the material receiving drive component (4), a main support plate (92) fixed to the lower part of the bag ejection mounting frame (91), an upper clamp plate (93) slidably mounted in a vertical direction on the bag ejection mounting frame (91), and a holding power component (94) for holding the cutting piece by moving the upper clamp plate (93). The first group of gripper rollers (2) is connected to the side of the main support plate (92) which is distant from the upper clamp plate (93). The second pattern change transport component (5) is connected to the bag ejection mounting frame (91). The main support plate (92) is used for positioning large cut pieces. The upper clamp plate (93) is moved by the holding power component (94) to hold and fix the large cut piece tightly. The specific structure and operation process of the bag opening structure (9) are based on the present technology and will not be described in detail herein.

[0048] If we take the automatic bag opening machine as an example, the working process is as follows:
In the initial position: 1. The bag opening structure (9) is in the initial large cut piece insertion position; 2. The second group of gripper rollers (55) is held in the rear position by the second pattern transport drive component (56) and lifted up by the pick and carry roller (54); 3. The first pattern ejection plate is used for inserting materials such as upper pocket mouth, pocket flap, etc., and is located on the lifting panel (331) in the first material conveying section (31), and the lifting cylinder (332) is in the retracted position; 4. The second pattern ejection plate is used for inserting materials such as lower pocket mouth, and is positioned in the second transport section (32) by inserting the positioning pin (62) into the positioning hole (101).

[0049] Alternating replacement process of the pattern ejection plate (10):

S1: When the machine is just turned on, all structures are in the starting position and the operator places the large cutting piece on the main support plate (92).

S2: Once the large cutting piece is placed, the holding power mechanism moves the upper clamp plate (93) to hold the large cutting piece firmly, and operations such as laser cutting and pocket mouth crimping are performed. During these operations, the second pattern change transport component (5) remains stationary and only follows the left and right movement of the bag opening structure (9).

S3: Following completion of the laser cutting and pocket mouth crimping operations, materials such as the upper pocket mouth, the pocket flap are placed and a signal is sent. When the signal is received, the bag opening structure (9) is moved by the material receiving drive component (4) onto the first material conveying section (31).

S4: After the bag opening structure (9) is in place, the lifting cylinder (332) moves the lifting panel (331) upwardly to lift the first pattern ejection plate upwardly so that it attaches to the lower part of the main support plate (92). In this process, thanks to the floating elastic part (345), the pattern clamping cylinder (342) moves up synchronously with the lifting panel (331). After the first Pattern Ejection Plate moves upward and snaps into place, the first group of gripper rollers (2) holds the first pattern ejection plate firmly, and simultaneously the pattern clamping cylinder (342) releases the first pattern ejection plate.

S5: The first pattern transport drive component (343) operates to move the pattern clamping cylinder (342) back to the second transport section (32), and meanwhile the pattern clamping cylinder (342) returns to its original position by means of the floating elastic part (345).

S6: The pattern clamping cylinder (342) operates again to hold the second pattern ejection plate firmly and at the same time the positioning cylinder (61) operates to move the positioning pin (62) down and out of the positioning hole (101).

S7: The material receiving drive component (4) moves the bag opening structure (9) and the first pattern ejection plate synchronously to the sewing head (8), and the sewing process of the upper pocket opening and the large cut piece is performed.

S8: While the previous step is being performed, the first pattern transport drive component (343) moves the second pattern ejection plate to the first material conveying section (31), and at the same time, the lifting cylinder (332) moves the lifting panel (331) back to the starting position and places the second pattern ejection plate on the lifting panel (331).

S9: When the sewing operation S7 is completed, the second pattern transport drive component (56) moves the second group of gripper roller (55) to the position corresponding to the first pattern ejection plate, and then the pick and carry roller (54) moves the second group of gripper roller (55) down.

S10: The second group of gripper roller (55) operatively holds the first pattern ejection plate firmly, and simultaneously the second group of gripper roller (55) releases the first pattern ejection plate.

S11: After completing operation S10, the lower pocket mouth materials are inserted and a signal is sent. When the signal is received, the material receiving drive component (4) moves the bag opening structure (9) back onto the first material transport section (31).

S12: The second pattern transport drive component (56) moves the second group of gripper rollers (55) to move the first pattern ejection plate to the second transport section (32).

S13: After completing operation S12, the lifting cylinder (332) moves the lifting panel (331) upwardly to lift the second pattern ejection plate upwardly to adhere to the lower portion of the main support plate (92). In this process, due to the floating elastic part (345), the pattern clamping cylinder (342) moves up synchronously with the lifting panel (331). After the second pattern ejection plate moves upward and snaps into place, the first group of gripper cylinders (2) holds the second pattern ejection plate firmly and simultaneously the pattern clamping cylinder (342) releases the second pattern ejection plate.

S14: While executing operation S13, the positioning cylinder (61) operates and moves the positioning pin (62) upward, and the positioning pin (62) is inserted into the positioning hole (101), so that the first pattern ejection plate is positioned, and at the same time, the second group of gripper rollers (55) releases the first pattern ejection plate.

S15: The material receiving roller retracts and moves the second group of gripper rollers (55) upwards.

S16: AfterS15 is completed, the material receiving drive component (4) moves the bag opening structure (9) and the second pattern ejection plate to the sewing head (8), and the sewing process of the lower pocket mouth and the large cut piece is performed.

S17: The first pattern transport drive component (343) moves the pattern clamping cylinder (342) to the second transport section (32).

S18: The pattern clamping cylinder (342) operates again to firmly hold the first pattern ejection plate and simultaneously the positioning cylinder (61) operates to move the positioning pin (62) down and out of the positioning hole (101).

S19: The first pattern transport drive component (343) moves the first pattern ejection plate to the first material transport section (31).

S20: After completion of operation S19, the lifting cylinder (332) moves the lifting panel (331) back to its initial position and places the second pattern ejection plate on the lifting panel (331), at the same time the pattern clamping cylinder returns to its original position.

S21: Once the sewing operation S16 is completed, the second pattern transport drive component (56) moves the second group of gripper roller (55) to the position corresponding to the first Pattern Ejection Plate, and then the pick and carry roller (54) moves the second group of gripper roller (55) down.

S22: The second group of gripper roller (55) operates to hold the second pattern ejection plate firmly, and simultaneously the second group of gripper roller (55) releases the second pattern ejection plate.

S23: The second pattern transport drive component (56) moves the second group of gripper rollers (55) back again and moves the second pattern ejection plate to the rear position.

S24: When sewing is completed, the operator takes the material.

[0050] Through the harmonious cooperation among the sewing head (8), the bag opening structure (9), and the quick-change mechanism of the pattern ejection plate (10), automatic laser cutting, hemming, sewing, and pattern changing are realized, and the processing efficiency is improved.

Claims

1. A device for quick changing the pattern ejection plate of a sewing machine, the device comprising:

- a frame (1),

- a first group of gripper rollers (2) positioned under the opening structure of a sewing machine and adapted to firmly fix a pattern ejection plate under an opening structure (9),

- a pattern transport mechanism (3) mounted on the frame (1) and located on the opposite side of the sewing head (8) of the sewing machine, wherein the pattern transport mechanism (3) comprises:

- first (31) and second (32) transport sections for transporting a pattern ejection plate (10),

- a lifting component (33) for holding a pattern ejection plate (10) in the first transport section (31),

- a first pattern change transport component (34) for transporting a pattern ejection plate (10) from the first transport section (31) to the second transport section (32),

- a material receiving drive component (4) mounted on the frame (1) and adapted to move the opening structure (9) of the sewing machine back and forth between the first transport section (31) and a sewing head (8),

- and a second pattern change transport component (5) located opposite the opening structure (9) and the first group of gripper rollers (2) and adapted to transport a pattern ejection plate (10) to the second transport section (32).

2. The device of claim 1, wherein the lifting component (33) comprises a lifting panel (331) slidably connected to the frame (1) for moving a pattern ejection plate (10), and a lifting cylinder (332) fixed to the frame (1) for moving the lifting panel (331) up and down.

3. The device of claim 1, wherein the first pattern change transport component (34) includes a pattern change mounting frame (341) slidably mounted on the frame (1), a pattern clamping cylinder (342) fixed to the pattern changing mounting frame (341), and a first pattern transport drive component (343) for reciprocating the pattern change mounting frame (341) between the first transport section (31) and the second transport section (32).

4. The device of claim 3, further comprising a clamping seat (344) slidably connected to the pattern change mounting frame (341) and corresponding to a clamping portion of the clamping cylinder (342), a gripper roller (2) fixed to the clamping seat (344) and a floating elastic part (345) between the pattern change mounting frame (341) and the clamping seat (344).

5. The device of claim 1, wherein the second transport section (32) further comprises a positioning component (6) which comprises a positioning cylinder (61) fixed to the frame (1) and a positioning pin (62) fixed to the positioning cylinder (61), which is compatible with the positioning hole (101) in the pattern ejection plate.

6. The device of claim 1, wherein the second pattern change transport component (5) comprises a transport frame (51) fixed to the opening structure (9), a transport support (52) slidably mounted to the transport frame (51), a pick and carry plate (53) slidably mounted to the transport support (52) in a vertical direction, a pick and carry roller (54) fixed to the transport support (52) for reciprocating the pick and carry plate (53), a second group of gripper rollers (55) disposed on the drive plate for picking up the pattern ejection plate (10), and a second pattern transport drive component (56) for reciprocating the transport frame (51).

7. The device of claim 3, wherein the first pattern transport drive component (343), the material receiving drive component (4) and a second pattern change drive component (5) are selected from the following components, which can be applied separately or in combination: ball screw drive component, belt drive component or gearwheel drive component.

8. The device of claim 2, wherein the first transport section (31) further comprises an auxiliary correction component (7) which comprises a correction cylinder (71) fixed to the frame (1) and a positioning column (72) on the piston rod fixed to the correction cylinder (71); and wherein the lifting panel (331) has a hole for the positioning column (72) to pass through, and the positioning column (72) adapts to the correction hole (104) in the pattern ejection plate (10).

9. A sewing machine incorporating the device of any of the preceding claims.

Drawing