Edge pressing device for welt sewing of front trouser pocket

Abstract

The utility model relates to the technical field of sewing machines, and provides an edge pressing device for front trouser pocket welt sewing, which comprises a machine base, a connecting plate, a machine head, an edge turning frame, a welt pressing plate and a displacement transmission mechanism, and the displacement transmission mechanism comprises a first driving mechanism, a second driving mechanism, a third driving mechanism and a fourth driving mechanism. The output end of the first driving mechanism and the output end of the second driving mechanism are connected with the two sides of the welt pressing plate correspondingly, and the first driving mechanism and the second driving mechanism stretch out and draw back synchronously to drive the welt pressing plate to move forwards or backwards. The third driving mechanism and the fourth driving mechanism are arranged on the left portion and the right portion of the connecting plate respectively, and the output end of the third driving mechanism and the output end of the fourth driving mechanism can press downwards to drive the welt pressing plate to press the cloth or lift upwards to enable the welt pressing plate to loosen the cloth. The edge pressing device solves the problems that a knitting needle of an existing edge pressing device for front trouser pocket welt sewing cannot be attached to an edge pressing plate for sewing, and sewing quality is affected by different softness of trouser pieces and patches.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a pressing device for sewing the edges of front trouser pockets. Background Art

[0002] Pants are one of the daily necessities of people. Pants generally have front pockets and back pockets, which not only play the role of carrying items, but also play a decorative role. Among them, a welt is usually sewn at the opening of the front pocket to prevent the edge of the pocket from deformation and wear and play a decorative role. In the production process of the front pocket, the bag cloth, trouser piece and welt are first sewn together, and then the welt is turned up and sewn at adjacent positions. In this way, the sewing can not only hide the raw edges of the trouser piece and the welt, but also make the welt after turning up more flat. At present, the method of manual sewing, turning up and then sewing is often used. Not only is the sewing efficiency low, but also wrinkles and uneven stitches will appear. With the development of sewing equipment, some devices that are automatically sewn by manual feeding and turning up have appeared on the market. The main purpose is to press and clamp the bag cloth, trouser piece and welt to the bottom of the sewing machine for sewing, which greatly improves the sewing efficiency and unifies the length of the stitches, but the manual turning up still has the problem of wrinkles, which will affect the overall processing efficiency and cannot meet the actual needs of manufacturers. For this purpose, a front trouser pocket welt sewing device came into being. For example, Chinese patent document: CN202120103091.7 discloses a front trouser pocket welt sewing automatic flanging device, including a machine base, a connecting plate and a machine head. The machine head includes a pressing plate, and the left and right sides of the pressing plate are respectively formed with extension plates backward. A pressing groove is provided at the front end of the pressing plate, and a welt pressing plate is provided in the pressing groove. A welt pressing plate seat is provided behind the pressing groove. A welt pressing plate cylinder is provided on the connecting plate, and the welt pressing plate cylinder is connected to the welt pressing plate seat. A flanging frame is arranged in front of the welt pressing plate, and the left and right ends of the flanging frame are respectively formed with flanging connection plates backward, a long hole is arranged in the middle of the flanging connection plate, a gasket is arranged in the long hole, a flanging connection fixing plate is arranged above the flanging connection plate, the flanging connection fixing plate is pressed against the gasket and connected to the pressing plate through the flanging connection fixing plate screw, a gap is formed between the flanging connection fixing plate and the pressing plate so that the flanging connection plate can slide along the long hole direction, and a flanging cylinder is arranged on the extension plate, and the flanging cylinder is connected to one end of the flanging connection plate. Although it improves the processing efficiency of the front trouser pocket, when the welt pressing plate is loosened and lifted up, it expands toward the machine head, so that the sewing needle cannot be close to the position where the welt pressing plate presses down the front trouser pocket for sewing, otherwise the welt pressing plate will touch the knitting needle or even damage the knitting needle when it is lifted up, and in the sewing process, the closer the knitting needle is to the position of the welt pressing plate for sewing, the better the sewing effect will be, and the farther the sewing position is from the cloth pressed by the welt pressing plate, the looser the cloth will be, and the worse the sewing effect will be, and low-quality sewing will be produced. At the same time, when the trouser piece fabric of the front trouser pocket is too soft or there is a big difference in softness between the trouser piece and the welt fabric, the welt will easily cause the trouser piece to move during the welt and turn-over process, resulting in uneven fabric surface or wrinkles after the trouser piece and the patch are sewn together, affecting the processing quality. Utility Model Content

[0003] Therefore, in view of the above problems, the utility model proposes a pressing device for sewing the front trouser pocket hem which has simple structure, high production efficiency, convenient use, good sewing effect and high processing quality.

[0004] To solve this technical problem, the utility model adopts the following scheme: a pressing device for sewing the welt of a front trouser pocket, comprising a machine base, a connecting plate fixed to the machine base, a machine head fixed to the connecting plate and connected to the machine base, a flanging frame, a welt pressing plate and a displacement transmission mechanism for driving the welt pressing plate to move and press cloth, the front end of the machine head is provided with a pressing groove and a side of the machine head close to the connecting plate is provided with a pressing plate connected to the connecting plate, the displacement transmission mechanism comprises a first driving mechanism, a second driving mechanism, a third driving mechanism and a fourth driving mechanism, the first driving mechanism and the second driving mechanism are respectively arranged on both sides of the connecting plate, the output end of the first driving mechanism and the output end of the second driving mechanism are respectively connected to both sides of the welt pressing plate and the first driving mechanism and the second driving mechanism are synchronously telescopic to drive the welt pressing plate to move forward or backward, the side of the welt pressing plate away from the flanging frame is located at the bottom of the connecting plate, the third driving mechanism and the fourth driving mechanism are respectively arranged on the left and right parts of the connecting plate and the output ends of the third driving mechanism and the fourth driving mechanism can press down to drive the welt pressing plate to press the cloth or lift up to make the welt pressing plate release the cloth.

[0005] A further improvement is that the displacement transmission mechanism also includes a first connecting member and a second connecting member, the output end of the first driving mechanism is connected to one side of the edge pressure plate via the first connecting member, and the output end of the second driving mechanism is connected to the other side of the edge pressure plate via the second connecting member, and the connecting plate is located on the front and rear moving stroke line of the first connecting member and the second connecting member, and is respectively provided with a first guide groove and a second guide groove, and the first connecting member and the second connecting member are respectively provided with a limiting rod passing through the first guide groove and the second guide groove and can move on the first guide groove and the second guide groove respectively.

[0006] As a further improvement, the displacement transmission mechanism also includes a first limit block and a second limit block, which are respectively adjustably arranged on the connecting plate at the maximum travel of the first connecting member and the second connecting member to limit the maximum travel of the first connecting member and the second connecting member and thereby limit the forward movement position of the edge pressure plate.

[0007] As a further improvement, a first elastic sheet is provided on a surface of the first limiting block facing the first connecting member, and a second elastic sheet is provided on a surface of the second limiting block facing the second connecting member.

[0008] As a further improvement, the first driving mechanism, the second driving mechanism, the third driving mechanism and the fourth driving mechanism are all cylinders.

[0009] As a further improvement, the displacement transmission mechanism also includes a fifth driving mechanism and a clamping foot. The fifth driving mechanism is arranged in the middle of the connecting plate and the fifth driving mechanism is connected to and drives the clamping foot to press down the edge pressing plate or lift up to release the patch pressing plate.

[0010] By adopting the above-mentioned technical scheme, the beneficial effect of the utility model is as follows: by setting the first drive mechanism output end and the second drive mechanism output end to be respectively connected to the two sides of the edge pressing plate and the first drive mechanism and the second drive mechanism synchronously extend and retract to drive the edge pressing plate to move forward or backward, the third drive and the fourth drive mechanism are respectively arranged on the left and right parts of the connecting plate and the output ends of the third drive mechanism and the fourth drive mechanism can press down to drive the edge pressing plate to press the fabric or lift up to make the edge pressing plate loosen the fabric, so that the user can adjust the edge pressing plate to move forward to the stitching line position to press the fabric according to their own needs, so that the knitting needle can directly approach the edge pressing plate for stitching and because the fabric is pressed close to the stitching line position, the trouser piece fabric is softer than the edge when the edge is turned up. It will not cause the trouser piece to move out of position. After sewing is completed, the third driving mechanism and the fourth driving mechanism are released, and then the first driving mechanism and the second driving mechanism drive the edge pressing plate to move backward, so that the knitting needle is close to the edge pressing plate to process the fabric and it is ensured that the edge will not cause the trouser piece to move out of position when turning the edge. The structure is simple, the production efficiency is high, the use is convenient, the sewing effect is good, and the processing quality is high. Through further settings, the settings of the first connecting member and the second connecting member make the movement of the edge pressing plate more stable, and enhance the durability of the overall structure. The settings of the adjustable first limiting block and the second limiting block can make the forward movement position of the edge pressing plate more accurate, and the pressing position of the patch pressing plate is accurate, thereby making the sewing processing quality of the front trouser pocket edge better, and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a partial top view of the structure of an embodiment of the utility model;

[0012] Figure 2 It is a partial bottom view structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0013] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. The structures of the machine base, connecting plate, and flanging frame have been disclosed in our company's previous application CN202220371793.8 A novel front trouser pocket welt sewing device. Therefore, only the new design part of this application is described in detail in the following embodiments.

[0014] refer to Figure 1 and Figure 2The preferred press device for sewing the front trouser pocket welt of the utility model includes a machine base, a connecting plate 1 fixed to the machine base, a machine head 2 fixed to the connecting plate 1 and connected to the machine base, a flanging frame 3, a welt pressing plate 4 and a displacement transmission mechanism for driving the welt pressing plate 4 to move and press cloth, the front end of the machine head 2 is provided with a pressing groove 21 and the side of the machine head 2 close to the connecting plate 1 is provided with a pressing plate connected to the connecting plate, the displacement transmission mechanism includes a first driving mechanism 51, a second driving mechanism 52, a third driving mechanism 53, a fourth driving mechanism 54, a fifth driving mechanism 55, a pressing foot 56, a first connecting member 57, a second connecting member 58, a first limiting block 59 and a second limiting block The first drive mechanism 51, the second drive mechanism 52, the third drive mechanism 53, the fourth drive mechanism 54 and the fifth drive mechanism 55 are all cylinders. The first drive mechanism 51 and the second drive mechanism 52 are respectively arranged on both sides of the connecting plate. The output end of the first drive mechanism 51 is connected to one side of the edge pressing plate 4 through the first connecting member 57, and the output end of the second drive mechanism 52 is connected to the other side of the edge pressing plate 4 through the second connecting member 58. The first drive mechanism 51 and the second drive mechanism 52 are synchronously extended and retracted to drive the edge pressing plate 4 to move forward or backward. The connecting plate 1 is located on the front and rear moving stroke lines of the first connecting member 57 and the second connecting member 58. There are first guide grooves 101 and second guide grooves 102, the first connecting member 57 and the second connecting member 58 are respectively provided with limit rods passing through the first guide grooves 101 and the second guide grooves 102 and can move on the first guide grooves 101 and the second guide grooves 102 respectively, the first limit block 59 and the second limit block 510 are respectively adjustably arranged on the connecting plate 1 at the maximum travel of the first connecting member 57 and the second connecting member 58 to limit the maximum travel of the first connecting member 57 and the second connecting member 58 and thus limit the position of the edge pressing plate 4 moving forward, the first limit block 59 is provided with a first elastic sheet on a surface facing the first connecting member 57, and the second limit block 510 is provided with a first elastic sheet on a surface facing the first connecting member 57. 0 A second elastic sheet is provided on the side facing the second connecting member 58, the side of the edge pressing plate 4 away from the flanging frame 3 is located at the bottom of the connecting plate 1, the third driving mechanism 53 and the fourth driving mechanism 54 are respectively arranged on the left and right parts of the connecting plate 1, and the output ends of the third driving mechanism 53 and the fourth driving mechanism 54 can press down to drive the edge pressing plate 4 to press the cloth or lift up to make the edge pressing plate 4 loosen the cloth, the fifth driving mechanism 55 is arranged in the middle of the connecting plate 1 and the fifth driving mechanism 55 is connected and drives the pressing foot 56 to press down the edge pressing plate 4 or lift up to loosen the patch pressing plate 4, and the third driving mechanism 53, the fourth driving mechanism 54 and the fifth driving mechanism 55 press down or lift up synchronously.

[0015] In the above embodiment, the fifth driving mechanism and the pressing foot may not be provided, and the pressing foot includes a rotating shaft and a pressing foot provided on the rotating shaft, wherein both ends of the rotating shaft can be rotatably provided on the connecting plate, and the fifth driving mechanism is connected to drive the rotating shaft to rotate, thereby driving the pressing foot on the rotating shaft to press down or lift up to release. The first connecting member and the second connecting member are provided to better ensure the forward and backward position of the edge pressing plate and the stability of the structure, and the first limit block and the second limit block are provided to further improve the accuracy of the forward movement of the edge pressing plate, so that it can more accurately press the cloth close to the suture line position.

[0016] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A pressing device for sewing the hem of a front trouser pocket, comprising a machine base, a connecting plate fixed to the machine base, a machine head fixed to the connecting plate and connected to the machine base, a flanging frame, a welt pressing plate, and a displacement transmission mechanism for driving the welt pressing plate to move and press the cloth, wherein a pressing groove is provided at the front end of the machine head and a pressing plate connected to the connecting plate is provided at one side of the machine head close to the connecting plate, and the characteristics are: The displacement transmission mechanism includes a first driving mechanism, a second driving mechanism, a third driving mechanism and a fourth driving mechanism. The first driving mechanism and the second driving mechanism are respectively arranged on both sides of the connecting plate. The output end of the first driving mechanism and the output end of the second driving mechanism are respectively connected to the two sides of the edge pressing plate, and the first driving mechanism and the second driving mechanism are synchronously extended and retracted to drive the edge pressing plate to move forward or backward. The side of the edge pressing plate away from the flanging frame is located at the bottom of the connecting plate. The third driving mechanism and the fourth driving mechanism are respectively arranged on the left and right parts of the connecting plate, and the output ends of the third driving mechanism and the fourth driving mechanism can press down to drive the edge pressing plate to press the cloth or lift up to make the edge pressing plate loosen the cloth.

2. A pressing device for sewing the front trouser pocket edge according to claim 1, characterized in that: The displacement transmission mechanism also includes a first connecting member and a second connecting member. The output end of the first driving mechanism is connected to one side of the edge pressing plate via the first connecting member, and the output end of the second driving mechanism is connected to the other side of the edge pressing plate via the second connecting member. The connecting plate is located on the front and rear moving stroke line of the first connecting member and the second connecting member and is respectively provided with a first guide groove and a second guide groove. The first connecting member and the second connecting member are respectively provided with a limiting rod that passes through the first guide groove and the second guide groove and can move on the first guide groove and the second guide groove respectively.

3. The edge pressing device for sewing the front trouser pocket edge according to claim 2, characterized in that: The displacement transmission mechanism also includes a first limit block and a second limit block, which are respectively adjustably arranged on the connecting plate at the maximum travel of the first connecting member and the second connecting member to limit the maximum travel of the first connecting member and the second connecting member and thereby limit the forward movement position of the edge pressure plate.

4. A pressing device for sewing the front trouser pocket edge according to claim 3, characterized in that: A first elastic sheet is disposed on a surface of the first limiting block facing the first connecting member, and a second elastic sheet is disposed on a surface of the second limiting block facing the second connecting member.

5. The edge pressing device for sewing the front trouser pocket edge according to claim 1, characterized in that: The first driving mechanism, the second driving mechanism, the third driving mechanism and the fourth driving mechanism are all cylinders.

6. The edge pressing device for sewing the front trouser pocket edge according to claim 1, characterized in that: The displacement transmission mechanism also includes a fifth driving mechanism and a pressing foot. The fifth driving mechanism is arranged in the middle of the connecting plate and is connected to and drives the pressing foot to press down the edge pressing plate or lift up and release the patch pressing plate.

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