A type of sewing machine

Abstract

This utility model discloses a garment sewing machine, including a sewing machine head, a needle mounted on the sewing machine head, and a presser foot. A presser foot mounting plate is provided on one side of the sewing machine head. An auxiliary presser foot is mounted on the presser foot mounting plate via a sliding guide rail. The presser foot mounting plate is equipped with a presser foot front drive cylinder that drives the auxiliary presser foot to move below the needle. This utility model features a guiding auxiliary presser foot. When the fabric is folded and moved to a position below the needle, the presser foot front drive cylinder drives the auxiliary presser foot to move below the needle. The folded fabric side abuts against one side of the guide plate. The needle and auxiliary presser foot cooperate to continue sewing, ensuring consistent stitch spacing at the seam stop, achieving automated seam stop sewing, and improving work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of clothing sewing equipment, specifically a garment sewing machine. Background Technology

[0002] Patent No. 201910486944.7 discloses a garment sewing machine, including a frame, a worktable mounted on the frame, and a sewing machine head. The worktable has a feeding area, a waiting area, and a sewing area. The feeding area is equipped with a height-adjustable presser foot and a feeding transmission mechanism that drives the presser foot to move between the feeding area and the waiting area. The sewing area is located below the sewing machine head and is equipped with a height-adjustable sewing presser foot and a sewing transmission mechanism that drives the presser foot to move in the XY coordinate system of the sewing area. A cutting mechanism is provided on one side of the sewing machine head.

[0003] The patent disclosure has certain flaws. When sewing the placket fabric to the stop, manual operation is required to ensure that the stitch spacing of the stop is consistent. At the same time, the slit size of the cutter is fixed when cutting the material. If the slit size needs to be adjusted, the corresponding size cutter needs to be manually installed and removed, which increases the installation and adjustment time and affects work efficiency. Summary of the Invention

[0004] This utility model addresses the aforementioned technical problems by providing a garment sewing machine with an auxiliary presser foot that guides the folded fabric pieces during sewing, ensuring consistent seam spacing and achieving automated seam sewing.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a garment sewing machine, including a sewing machine head, a needle and a presser foot set on the sewing machine head, a presser foot mounting plate provided on one side of the sewing machine head, an auxiliary presser foot mounted on the presser foot mounting plate through a sliding guide rail, and a presser foot front drive cylinder provided on the presser foot mounting plate to drive the auxiliary presser foot to move below the needle.

[0006] To optimize the above technical solution, the present invention also includes the following improved technical solutions.

[0007] The aforementioned auxiliary presser foot includes a presser foot plate with a guide slope at the front end. A needle hole is formed in the middle of the presser foot plate for the needle to pass through. A rotatable guide plate is provided on one side of the needle hole. The front end of the guide plate passes through the guide slope and is located below the guide slope.

[0008] The aforementioned auxiliary presser foot is equipped with a first rotating shaft, the rotation of the guide plate is mounted on the first rotating shaft, and a spring is connected to the rear end of the guide plate.

[0009] The aforementioned sliding guide rail is installed inside the slider of the presser foot mounting plate. The lower end of the sliding guide rail is connected to the auxiliary presser foot, and the upper end of the sliding guide rail is connected to the drive rod of the presser foot front drive cylinder.

[0010] Compared with the prior art, the present invention provides a garment sewing machine with an auxiliary presser foot that acts as a guide. When the fabric is folded and moved to a position below the needle, the presser foot front drive cylinder drives the auxiliary presser foot to move below the needle. The side of the folded fabric abuts against one side of the guide plate, and the needle and auxiliary presser foot work together to continue sewing, ensuring that the stitch spacing of the sewn edge is consistent, realizing automated sewing of the edge, and improving work efficiency. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0012] Figure 2 This is a three-dimensional structural diagram of this embodiment from another perspective.

[0013] Figure 3 This is a three-dimensional structural diagram of the auxiliary presser foot.

[0014] Figure 4 This is a three-dimensional structural diagram of the cutting mechanism.

[0015] Figure 5 yes Figure 4 Exploded view of part of the structure. Detailed Implementation

[0016] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0017] Figures 1 to 5 The diagram shown is a structural schematic of this utility model.

[0018] The attached figures are labeled as follows: sewing machine head 1, needle 2, middle presser foot 3, presser foot mounting plate 4, sliding guide rail 5, slider 6, auxiliary presser foot 7, presser foot plate 7a, guide slope 7b, needle hole 7c, guide plate 7d, mounting groove 7e, presser foot front drive cylinder 8, first rotating shaft 9, vibrating knife mounting seat 10, vibrating rod 11, vibrating knife drive motor 12, vibrating knife 13, fixed mounting plate 14, first cutter bracket 15, second cutter bracket 16, rotating mounting hole 16a, first cutter 17, second cutter 18, cutter adjustment motor 19, drive plate 20, lead screw 21, extension bracket 22, cutting pressure plate 23, cutter groove 23a, lifting guide rail 24, cutter lifting cylinder 25, first connecting rod 26.

[0019] The present invention relates to a garment sewing machine, comprising a sewing machine head 1, a needle 2 mounted on the sewing machine head 1, and a presser foot 3. A presser foot mounting plate 4 is provided on one side of the sewing machine head 1, and an auxiliary presser foot 7 is mounted on the presser foot mounting plate 4 via a sliding guide rail 5. The presser foot mounting plate 4 is provided with a presser foot front drive cylinder 8 for driving the auxiliary presser foot 7 to move below the needle 2.

[0020] The auxiliary presser foot 7 includes a presser foot plate 7a. The front end of the presser foot plate 7a has a guide slope 7b. During sewing, the presser foot plate 7a presses down on the fabric, and the fabric is sewn through the presser foot plate 7a from one end of the guide slope 7b. The guide slope 7b is curved upward to prevent the fabric from being stretched and deformed. The presser foot plate 7a has a needle hole 7c in the middle through which the needle 2 passes. A rotatable guide plate 7d is provided on one side of the needle hole 7c. The front end of the guide plate 7d passes through the guide slope 7b and is located below the guide slope 7b.

[0021] The auxiliary presser foot 7 is equipped with a first rotating shaft 9, and the rotation of the guide plate 7d is mounted on the first rotating shaft 9. A spring is connected to the rear end of the guide plate 7d. The presser foot plate 7a has a mounting groove 7e for mounting the guide plate 7d. One end of the spring is connected to the rear end of the guide plate 7d, and the other end of the spring is connected to the mounting groove 7e. The spring applies an upward force to the rear end of the guide plate 7d, keeping the front end of the guide plate 7d below the guide slope 7b. If the front end of the guide plate 7d comes into contact with the fabric, the front end of the guide plate 7d can be lifted to avoid damaging the fabric.

[0022] The sliding guide rail 5 is installed inside the slider 6 of the presser foot mounting plate 4. The sliding guide rail 5 is arranged at an angle. The lower end of the sliding guide rail 5 is connected to the auxiliary presser foot 7, and the upper end of the sliding guide rail 5 is connected to the drive rod of the presser foot front drive cylinder 8. The drive rod of the presser foot front drive cylinder 8 drives the auxiliary presser foot 7 to move at an angle through the sliding guide rail 5.

[0023] When sewing the stop, the needle 2 first works with the middle presser foot 3 to sew the placket fabric onto the body fabric. Then, when the fabric is folded over and moved to a position below the needle 2, the presser foot front drive cylinder 8 drives the auxiliary presser foot 7 to move below the needle 2. The side of the folded fabric abuts against one side of the guide plate 7d. The needle 2, the middle presser foot 3, and the auxiliary presser foot 7 work together to continue sewing, ensuring that the stitch spacing of the stop is consistent, thus achieving automated sewing of the stop and improving work efficiency.

[0024] In this embodiment, the distance between the needle hole 7c and the guide plate 7d is 1mm, therefore the stop line distance is 1mm. The distance between the needle hole 7c and the guide plate 7d can be adjusted according to different stop line distance requirements; the distance can also be 2mm, 3mm, etc.

[0025] The sewing machine head 1 is equipped with a vibrating knife mechanism 13, which includes a vibrating knife mounting base 10. The mounting base 10 has a vibrating rod 11 and a vibrating knife drive motor 12, which drives the vibrating rod 11 to move up and down. The lower end of the vibrating rod 11 has a vibrating knife 13 for cutting the fabric. The vibrating knife 13 cuts the placket fabric along the sewing stitch. The number of vibrating knives 13 is adjusted according to the sewing requirements of different plackets; it is a single-knife mode in concealed placket mode and a double-knife mode in exposed placket mode. In exposed placket mode, the placket fabric cut between the two vibrating knives 13 needs to be cut by a cutting mechanism.

[0026] The sewing machine head 1 is equipped with a cutting mechanism, which includes a fixed mounting plate 14. The fixed mounting plate 14 has a first cutter bracket 15 fixedly connected to it and a second cutter bracket 16 rotatably connected to it. The first cutter bracket 15 has a first cutter 17, and the second cutter bracket 16 has a second cutter 18. The first cutter 17 and the second cutter 18 are located on the same cutting line. The rotation of the second cutter bracket 16 controls the distance between the outer edges of the first cutter 17 and the second cutter 18. In this embodiment, the outer edge distance refers to the distance between the rear end of the blade of the first cutter 17 and the front end of the blade of the second cutter 18.

[0027] The fixed mounting plate 14 is equipped with a cutter adjustment motor 19, and the power output shaft of the cutter adjustment motor 19 is connected to a drive plate 20 that can be raised and lowered. The power output shaft of the cutter adjustment motor 19 is connected to a lead screw 21, and the drive plate 20 is connected to a lead screw nut. The lead screw nut cooperates with the lead screw 21, and the cutter adjustment motor 19 can drive the drive plate 20 to move up and down along the lead screw.

[0028] The drive plate 20 drives the second cutter bracket 16 to rotate via the first connecting rod 26, and the second cutter bracket 16 drives the second cutter 18 to rotate. One end of the first connecting rod 26 is rotatably connected to the drive plate 20, and the other end of the first connecting rod 26 is rotatably connected to the second cutter bracket 16. The second cutter bracket 16 has a rotating mounting hole 16a, in which a second rotating shaft is provided. The second cutter 18 is fixedly mounted on one end of the second rotating shaft, and the other end of the second rotating shaft is rotatably connected to the extension bracket 22 on the first cutter bracket 15.

[0029] When the drive plate 20 moves downward, the second cutter 18 moves closer to the first cutter 17, and the distance between the outer blades decreases; when the drive plate 20 moves upward, the second cutter 18 moves further away from the first cutter 17, and the distance between the outer blades increases.

[0030] A cutting plate 23 for pressing down the seam material is fixed below the mounting plate 14. The cutting plate 23 has a cutting groove 23a that passes through the first cutter 17 and the second cutter 18.

[0031] In this embodiment, the fixed mounting plate 14 is provided with two sets of first cutter brackets 15, second cutter brackets 16, first cutters 17, and second cutters 18. The tangents of the two sets of first cutters 17 and second cutters 18 are arranged in a V-shape. The number of first cutters 17 and second cutters 18 can be adjusted appropriately according to the required shape of the material to be cut. The number can be one set, two sets, or more sets.

[0032] The front side of the vibrating knife mounting base 10 is provided with a lifting guide rail 24, and the fixed mounting plate 14 is slidably mounted on the lifting guide rail 24. The sewing machine head 1 is provided with a cutter lifting cylinder 25 on one side. The drive rod of the cutter lifting cylinder 25 is connected to the fixed mounting plate 14, and the cutter lifting cylinder 25 drives the fixed mounting plate 14 to move up and down.

[0033] The preferred embodiment of this utility model has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of this utility model.

Claims

1. A garment sewing machine, comprising a sewing machine head (1), a needle (2) mounted on the sewing machine head (1), and a presser foot (3), characterized in that: The sewing machine head (1) is provided with a presser foot mounting plate (4) on one side. The presser foot mounting plate (4) is equipped with an auxiliary presser foot (7) via a sliding guide rail (5). The presser foot mounting plate (4) is provided with a presser foot front drive cylinder (8) to drive the auxiliary presser foot (7) to move below the needle (2).

2. A garment sewing machine according to claim 1, characterized in that: The auxiliary presser foot (7) includes a presser foot plate (7a), the front end of the presser foot plate (7a) has a guide slope (7b), the middle part of the presser foot plate (7a) has a needle hole (7c) through which the needle (2) passes, and a rotatable guide plate (7d) is provided on one side of the needle hole (7c). The front end of the guide plate (7d) passes through the guide slope (7b) and is located below the guide slope (7b).

3. A garment sewing machine according to claim 2, characterized in that: The auxiliary presser foot (7) is equipped with a first rotating shaft (9), and the rotation of the guide plate (7d) is mounted on the first rotating shaft (9). A spring is connected to the rear end of the guide plate (7d).

4. A garment sewing machine according to claim 3, characterized in that: The sliding guide rail (5) is installed in the slider (6) of the presser foot mounting plate (4). The lower end of the sliding guide rail (5) is connected to the auxiliary presser foot (7), and the upper end of the sliding guide rail (5) is connected to the drive rod of the presser foot front drive cylinder (8).

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