Sewing mechanism for zipper sewing and base fabric cutting

Abstract

The utility model discloses a sewing mechanism for sewing a zipper and cutting a base fabric. The sewing mechanism comprises a needle plate, wherein the needle plate is provided with a containing groove used for containing and guiding a zipper head to move transversely and two containing holes formed in the front side and the rear side of the containing groove; the upper end of the cloth feeding frame is provided with two cloth feeding blocks, the tops of the cloth feeding blocks are provided with cloth feeding teeth, and the two cloth feeding blocks correspondingly extend into the two containing holes; the first presser foot frame is provided with two inner presser feet, and the two inner presser feet are correspondingly arranged above the two cloth feeding blocks; two machine needles are mounted on the machine needle seat, and the two machine needles correspond to the first through holes in the two inner presser feet and the second through holes in the two cloth feeding blocks up and down correspondingly; the slotting cutter is arranged above the containing groove and connected with a driving assembly driving the slotting cutter to move up and down, and when the driving assembly drives the slotting cutter to move downwards, the slotting cutter can stretch into the containing groove. According to the technical scheme, the zipper head does not need to be taken down when the zipper and the base cloth are sewn, the sewing speed of the base cloth and the zipper is increased, and the processing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to zipper sewing, in particular to a sewing mechanism for sewing a zipper and cutting a base fabric. Background Art

[0002] When a zipper is manufactured, the zipper head is connected to the two chain straps, and the chain teeth on the two chain straps fit together. When the two chain straps need to be sewn together with the base fabric, the zipper head must first be removed from the zipper, and then the base fabric and zipper tape must be stacked together. After that, the zipper tape and base fabric are connected using a sewing machine, and the base fabric is slit with a slit knife. Finally, the zipper head is connected to the two chain straps. The sewing method of the zipper and base fabric requires removing the zipper head first, sewing, and then installing the zipper head, resulting in slow and inefficient connection of the zipper and base fabric. Utility Model Content

[0003] In order to overcome the existing technical defects, the purpose of the present utility model is to provide a sewing mechanism for sewing a zipper and cutting a base fabric to solve the above technical problems.

[0004] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0005] According to one aspect of the present invention, a sewing mechanism for sewing a zipper and cutting a base fabric is designed, comprising:

[0006] The needle plate is provided with a receiving groove for receiving and guiding the zipper head to move laterally, and is provided with two receiving holes located at the front and rear sides of the receiving groove;

[0007] The cloth feeding frame has two cloth feeding blocks with feed teeth on the top at the upper end, and the two cloth feeding blocks extend into the two receiving holes respectively;

[0008] The first presser foot stand has two inner presser feet, and the two inner presser feet are correspondingly arranged above the two cloth feeding blocks;

[0009] A needle seat is provided with two needles, and the two needles correspond to the first through holes on the two inner presser feet and the second through holes on the two cloth feed blocks in a vertical direction;

[0010] The slitting knife is arranged above the accommodating groove and located between the two inner presser feet. The slitting knife is connected to a driving component that drives it to move up and down. When the driving component drives the slitting knife to move downward, the slitting knife can extend into the accommodating groove.

[0011] By adopting the above technical solution, when the base fabric and the zipper need to be sewn together, one end of the zipper is laid on the top surface of the needle plate, the zipper head on the zipper is placed in the receiving groove, and the base fabric is placed on the top of the zipper, and the base fabric and zipper are pushed to the left to move. After the left end of the base fabric and the zipper are moved to under the slit knife, the base fabric is pressed by two inner presser feet, and the driving assembly drives the slit knife to move down to pierce the base fabric, and the fabric is fed to the left through the feed block on the feed rack. At the same time, the base fabric and the zipper tape are sewn together by two needles. The base fabric and the zipper tape are sewn and moved to the left, and the slit knife slits the base fabric that has moved to the left, thereby achieving the goal of not removing the zipper head when sewing the zipper and the base fabric, thereby improving the sewing speed and processing efficiency of the base fabric and the zipper; in addition to accommodating the zipper head, the receiving groove can also guide the zipper to move laterally to ensure the straightness of the sewing line and improve the sewing effect.

[0012] In order to better solve the above technical defects, the present invention also has a better technical solution:

[0013] In some embodiments, a limiting gap is provided on the top of the needle plate for the zipper tape to pass through. The limiting gap can make the top surface of the base fabric needle plate closely fit, thereby ensuring the sewing effect.

[0014] In some embodiments, the second presser foot stand is further provided with two outer presser feet, and the two inner presser feet are correspondingly arranged in the receiving openings of the two outer presser feet. Thus, the inner presser feet can exert a better pressing effect on the base fabric and the zipper, further ensuring the sewing effect of both.

[0015] In some embodiments, the needle plate is provided with a passage opening that connects the right end of the receiving groove to the outside and is used for passage of the zipper elements. The left end of the receiving groove is connected to the outside. The passage opening not only allows the zipper elements to be positioned away from the needle plate, allowing the zipper tape and base fabric to be laid flat on top of the needle plate, preventing the zipper and base fabric from tilting at the right end of the needle plate, but also guides the lateral movement of the zipper elements, ensuring the straightness of the sewing line between the base fabric and the zipper, further improving the sewing effect.

[0016] In some embodiments, a limiting partition is provided on top of the needle plate, forming the limiting gap between the limiting partition and the needle plate. A limiting plate is provided at the left end of the limiting partition, extending between the two inner presser feet. The limiting plate is provided with a through-hole for the lower end of the slitting blade to pass through. The limiting plate improves sewing quality by preventing the zipper tape from arching after passing through the limiting gap. This arching of the zipper tape can affect the quality of the sewing process between the zipper and the base fabric tape, and may even result in the zipper being scrapped. Furthermore, the limiting partition blocks the right end of the blade bar and the slitting blade from descending too far, preventing the slitting blade from descending too far and damaging the zipper.

[0017] In some embodiments, the driving assembly includes a knife rod and a driving member for driving the knife rod to move, and the slitting knife is mounted on the knife rod.

[0018] In some embodiments, the knife rod is rotatably engaged with the base via a pin shaft, and the driving member is installed at the left end of the base and is drivably connected to the knife rod to drive the left end of the knife rod to move up and down, thereby linking the slitting knife at the right end of the knife rod to move up and down.

[0019] In some embodiments, the driving member is a hydraulic cylinder, an electric cylinder, or an electric push rod.

[0020] In some embodiments, the driving member includes a cylinder and a tension spring. The cylinder is installed at the left end of the base and is driven and connected to the left end of the knife rod. The upper end of the tension spring is connected to the base, and the lower end is connected to the knife rod and is in a stretched state. A limiting member is connected to the left end of the knife rod. When the left end of the knife rod is driven upward, the limiting member abuts against the cylinder or the base to limit the descending height of the slitting knife at the right end of the knife rod.

[0021] In some embodiments, a wedge-shaped block is provided at the right end of the needle plate, and a chain tooth channel groove corresponding to the channel opening and used for the chain tooth to pass through is provided on the wedge-shaped block, and the longitudinal width of the channel opening and the chain tooth channel groove are both smaller than the longitudinal width of the accommodating groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a sewing mechanism for sewing a zipper and cutting a base fabric according to an embodiment of the present invention;

[0023] Figure 2 a schematic front view of the sewing mechanism for sewing and cutting the base fabric for the zipper;

[0024] Figure 3 a schematic right side view of the sewing mechanism for sewing and cutting the base fabric for the zipper;

[0025] Figure 4 an exploded diagram of the sewing mechanism that sews and cuts the base fabric for the zipper;

[0026] Figure 5 is a schematic diagram of the needle plate;

[0027] Figure 6 Schematic diagram of the cloth feeding frame;

[0028] Figure 7 is a schematic diagram of the tool bar;

[0029] Figure 8 It is a schematic diagram of the zipper and the bottom arrangement on the needle plate;

[0030] Figure 9 for Figure 8 The main schematic diagram of

[0031] Figure 10 A schematic diagram of a sewing mechanism for sewing a zipper and cutting a base fabric according to another embodiment of the present invention;

[0032] Reference numerals:

[0033] 1. Needle plate; 11. Receiving groove; 12. Receiving hole; 13. Passageway; 14. Limiting gap; 2. Feed frame; 21. Feed block; 211. Second through hole; 3. First presser foot support; 31. Inner presser foot; 311. First through hole; 4. Second presser foot support; 41. Outer presser foot; 5. Needle holder; 51. Needle; 6. Slit knife; 7. Wedge block; 71. Chain tooth passageway; 8. , limiting partition; 81, limiting plate; 811, through hole; 9, driving assembly; 91, knife rod; 910, pin shaft; 911, limiting member; 92, driving member; 921, cylinder; 922, tension spring; 10, base; 101, seat plate; 102, vertical plate; 103, sleeve; 104, pull rod; A1, zipper tape; A2, zipper head; A3, chain tooth; B, base fabric. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, and fixing should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Example 1

[0038] refer to Figures 1 to 9 As shown, the utility model provides a sewing mechanism for sewing a zipper and cutting a base fabric, comprising: a needle plate 1, a cloth feed frame 2, a first presser foot 3, a second presser foot 4, a needle seat 5 and a slitting knife 6.

[0039] The needle plate 1 is provided with a receiving groove 11, which is a horizontal structural groove. The receiving groove 11 is used to accommodate and guide the zipper head A2 to move horizontally. The left end of the receiving groove 11 passes through the left end of the needle plate 1, or it may not pass through the left end of the needle plate 1. In this embodiment, the left end of the receiving groove 11 preferably passes through the needle plate 1 and is connected to the outside. The needle plate 1 is also provided with two receiving holes 12 located on the front and rear sides of the receiving groove 11. The receiving hole 12 is a horizontal rectangular hole and passes through the needle plate 1 vertically.

[0040] The needle plate 1 is provided with a channel opening 13 that connects the right end of the accommodating groove 11 with the outside and is used for the zipper's chain tooth A3 to pass through. The needle plate 1 is provided with a wedge block 7 at the right end. The wedge block 7 is provided with a chain tooth channel groove 71 corresponding to the channel opening 13 and used for the chain tooth A3 to pass through. The longitudinal widths of the channel opening 13 and the chain tooth channel groove 71 are both smaller than the longitudinal width of the accommodating groove 11.

[0041] A limiting gap 14 is provided on the top of the needle plate 1 for the zipper tape A1 to pass through. Furthermore, a limiting partition 8 is provided on the top of the needle plate 1. The limiting partition 8 is an integral structure with the needle plate 1 or is fixed to the needle plate 1 by screws. The limiting gap 14 is formed between the limiting partition 8 and the needle plate 1. A limiting plate 81 extending between the two inner presser feet 31 is provided on the left end of the limiting partition 8. A through hole 811 corresponding to the upper and lower parts of the slitting knife 6 and for the lower end of the slitting knife 6 to pass through is provided on the limiting plate 81. The through hole 811 is a horizontal strip-shaped through hole.

[0042] The cloth feed frame 2 has two cloth feed blocks 21 at its upper end. A cloth feed dog is provided on the top of the cloth feed blocks 21. The two cloth feed blocks 21 extend into the two corresponding receiving holes 12. The cloth feed frame 2 is connected to the cloth feed drive mechanism on the existing sewing machine. The cloth feed drive mechanism drives the cloth feed frame 2 to move left and right to feed the zipper tape A1 or cloth to the left.

[0043] The first presser foot stand 3 has two inner presser feet 31, which are correspondingly arranged above the two cloth feeding blocks 21; the first presser foot stand 3 is connected to the head of the sewing machine through a first connecting rod, and the two inner presser feet 31 are used to press the base fabric B onto the zipper tape A1.

[0044] The second presser foot stand 4 has two outer presser feet 41, and the two inner presser feet 31 are correspondingly arranged in the receiving openings of the two outer presser feet 41. A second connecting rod is connected to the top of the second presser foot stand 4. The upper end of the second connecting rod passes through the sleeve 103 on the base 10 and is connected to the head of the sewing machine. The two outer presser feet 41 are used to press the base fabric B onto the zipper tape A1. The top of the needle plate 1 is provided with a toothed portion corresponding to the upper and lower sides of the outer presser feet 41. The first connecting rod and the second connecting rod are respectively connected to the presser foot driving mechanism on the existing sewing machine. The presser foot driving mechanism can drive the first and second connecting rods to rise and fall, and the inner presser feet 31 and the outer presser feet 41 are linked to each other to achieve the pressing or releasing of the base fabric B.

[0045] Two needles 51 are installed on the needle base 5, and the two needles 51 correspond to the first through holes 311 on the two inner presser feet 31 and the second through holes 211 on the two cloth feed blocks 21 in upper and lower directions; the needle base 5 is connected to the head of the existing sewing machine through a third connecting rod, and the head of the sewing machine is provided with a sewing drive mechanism for driving the third connecting rod to rise and fall. By driving the third connecting rod to rise and fall through the sewing drive mechanism, the needle base 5 and the two needles 51 can be linked to move up and down. The up and down movement of the two needles 51 can realize the sewing of the base fabric B and the zipper tape A1 together.

[0046] The slitting knife 6 is arranged above the accommodating groove 11 and is located between the two inner presser feet 31. The slitting knife 6 is connected to a driving component 9 that drives it to move up and down. When the driving component 9 drives the slitting knife 6 to move downward, the slitting knife 6 can be extended into the accommodating groove 11. When there is a base fabric B below the slitting knife 6, the slitting knife 6 is driven downward to pierce the base fabric B. When the base fabric B moves to the left, the slitting knife 6 can slit the base fabric B.

[0047] The driving assembly 9 includes a knife rod 91 and a driving member 92 for driving the knife rod 91 to move. The movement refers to up and down movement or swinging movement. The slitting knife 6 is installed on the knife rod 91. Furthermore, the knife rod 91 is rotatably matched with the base 10 through the pin 910, so that the knife rod 91 can swing with the pin as the rotating axis. The driving member 92 is installed at the left end of the base 10. The driving member 92 is connected to the left end of the knife rod 91. The driving member 92 can drive the left end of the knife rod 91 to move up and down, thereby linking the slitting knife 6 at the right end of the knife rod 91 to move up and down.

[0048] The driving member 92 includes a cylinder 921 and a tension spring 922. The cylinder 921 is installed at the left end of the base 10. The cylinder 921 is connected to the knife rod 91 through a universal joint, a Y-type joint or a floating joint. The upper end of the tension spring 922 is connected to the base 10, and the lower end is connected to the knife rod 91. The tension spring 922 is in a stretched state. When the cylinder 921 is working, the cylinder 921 drives the left end of the knife rod 91 to move downward, which can link the right end of the knife rod 91 and the slit knife 6 to move upward. When the cylinder 921 is not working, the tension spring 922 pulls the left end of the knife rod 91 to move upward, which can link the right end of the knife rod 91 and the slit knife 6 to move downward. The slit knife 6 moves downward to pierce the base fabric B.

[0049] The left end of the knife rod 91 is connected to a limiting member 911. When the left end of the knife rod 91 is driven to move upward, the limiting member 911 abuts against the cylinder 921 or the base 10 to limit the upward movement height of the left end of the knife rod 91, thereby limiting the descending height of the slitting knife 6 at the right end of the knife rod 91; the limiting member 911 is a nut, or the limiting member 911 is a pin rod. In this embodiment, the limiting member 911 is preferably a nut, and the nut is threadedly matched with the threaded hole on the knife rod 91, and the nut is threadedly connected to a nut for locking the nut.

[0050] The base 10 includes a seat plate 101, a vertical plate 102 fixed to the bottom of the seat plate 101, a sleeve 103 installed at the right end of the seat plate 101, and a pull rod 104 fixed to the seat plate 101. The pull rod 104 is fixed to the head of the sewing machine, and a notch is provided at the bottom of the vertical plate 102 for the middle part of the knife rod 91 to be placed.

[0051] Example 2

[0052] refer to Figure 10 As shown, the present invention provides a sewing mechanism for sewing a zipper and cutting a base fabric. The difference between this embodiment and the first embodiment is that: the driving member 92 is a hydraulic cylinder or an electric cylinder or an electric push rod, the knife rod 91 is not hinged to the base 10 through a pin shaft, and there is no limiting member connected to the knife rod 91. The driving end of the hydraulic cylinder or the driving end of the electric cylinder or the driving end of the electric push rod is directly connected to the knife rod 91, and is used to drive the knife rod 91 to rise and fall in conjunction with the slitting knife.

[0053] The above are only some embodiments of the present invention. For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A sewing mechanism for sewing a zipper and cutting a base fabric, characterized in that: include: The needle plate is provided with a receiving groove for receiving and guiding the zipper head to move laterally, and is provided with two receiving holes located at the front and rear sides of the receiving groove; The cloth feeding frame has two cloth feeding blocks with feed teeth on the top at the upper end, and the two cloth feeding blocks extend into the two receiving holes respectively; A first presser foot stand having two inner presser feet, wherein the two inner presser feet are correspondingly arranged above the two cloth feeding blocks; A needle seat is provided with two needles, and the two needles correspond to the first through holes on the two inner presser feet and the second through holes on the two cloth feed blocks in a vertical direction; The slitting knife is arranged above the accommodating groove and located between the two inner presser feet. The slitting knife is connected to a driving component that drives it to move up and down. When the driving component drives the slitting knife to move downward, the slitting knife can extend into the accommodating groove.

2. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 1, characterized in that: The top of the needle plate is provided with a limiting gap for the zipper tape to pass through.

3. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 1 or 2, characterized in that: It also includes a second presser foot stand, which has two outer presser feet. The two inner presser feet are correspondingly arranged in the accommodating openings on the two outer presser feet.

4. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 1, characterized in that: The needle plate is provided with a passage opening which connects the right end of the accommodating groove with the outside and is used for the zipper teeth to pass through, and the left end of the accommodating groove is connected with the outside.

5. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 2, characterized in that: A limiting partition is provided on the top of the needle plate, and the limiting gap is formed between the limiting partition and the needle plate. A limiting plate extending between the two inner presser feet is provided at the left end of the limiting partition, and a through hole is provided on the limiting plate for the lower end of the slitting knife to pass through.

6. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 1, characterized in that: The driving assembly includes a knife rod and a driving member for driving the knife rod to move, and the slitting knife is installed on the knife rod.

7. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 6, characterized in that: The knife rod is rotatably matched with the base through a pin shaft. The driving member is installed at the left end of the base and is drivingly connected to the knife rod to drive the left end of the knife rod to move up and down, thereby linking the slitting knife at the right end of the knife rod to move up and down.

8. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 6, characterized in that: The driving member is a hydraulic cylinder, an electric cylinder or an electric push rod.

9. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 7, characterized in that: The driving member includes a cylinder and a tension spring. The cylinder is installed at the left end of the base and is driven and connected to the left end of the knife rod. The upper end of the tension spring is connected to the base, and the lower end is connected to the knife rod and is in a stretched state. A limiting member is connected to the left end of the knife rod. When the left end of the knife rod is driven upward, the limiting member abuts against the cylinder or the base to limit the descending height of the slitting knife at the right end of the knife rod.

10. A sewing mechanism for sewing a zipper and cutting a base fabric according to claim 4, characterized in that: A wedge block is provided at the right end of the needle plate, and a chain tooth channel groove corresponding to the channel opening and used for the chain teeth to pass through is provided on the wedge block. The longitudinal widths of the channel opening and the chain tooth channel groove are both smaller than the longitudinal width of the accommodating groove.

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