Edge folding limiting mechanism for lower hem sewing machine

Abstract

The utility model discloses an edgefold limiting mechanism for a lower hem sewing machine, which comprises a fixed plate and a mounting flat plate which are mounted on a sewing machine headstock, the fixed plate is provided with a second striker plate, the mounting flat plate is provided with a first striker plate, and the first striker plate and the second striker plate are positioned below the plane of a material folding plate. The first striker plate and the second striker plate limit the length of the edge of the cloth folded into the folding plate, the edge folding amount is guaranteed to be consistent, the second striker plate limits the edge of the cloth to be always kept in the same length in the moving process, the edge of the cloth is sewn through a machine needle, and the effect of sewing the lower hem of the cloth is better.

Description

Technical Field

[0001] The utility model belongs to the field of sewing machines, and particularly relates to a hemming limiting mechanism for a bottom hem sewing machine. Background Art

[0002] The invention patent with the patent number 202121751739.8 discloses a sewing bottom hem device with switchable trimming, which includes a left rotating wheel and a right rotating wheel. A ring-shaped bottom hem fabric is sleeved on the left rotating wheel and the right rotating wheel and is driven by the right rotating wheel to rotate. Its characteristics are as follows: A window is opened on the table board on the right side of the needle board of the sewing machine. When trimming is required, the cutting edge of the cutting knife composed of a fixed knife and a moving knife is exposed from the window; when trimming is not required, the cutting knife is removed, and a baffle is fixed on the table board to limit the position of the inner edge of the bottom hem fabric.

[0003] There are certain defects in the disclosed content of this patent. This device includes a pressing strip and a cutting knife. The position of the cutting knife is close to the sewing machine needle, and the pressing strip is located in front of the cutting knife. If the cutting knife is removed and the pressing strip is installed when trimming is not required, there is still a certain distance between the pressing strip and the machine needle at this time. During the process of the fabric moving from the pressing strip to the machine needle, the fabric may be distorted and deformed, affecting the sewing of the bottom hem. Summary of the Invention

[0004] In view of the above technical problems, the utility model provides a hemming limiting mechanism for a bottom hem sewing machine. The edge of the fabric folded into the folding plate abuts against the first baffle and the second baffle and moves until it reaches below the machine needle to complete sewing, ensuring the consistency of the fabric hemming amount and improving the sewing quality.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows: A hemming limiting mechanism for a bottom hem sewing machine includes a fixing plate and an installation plate installed on the sewing machine head seat. The fixing plate is installed with a second baffle, and the installation plate is installed with a first baffle. The first baffle and the second baffle are located below the plane of the folding plate.

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

[0007] The above installation plate is fixed with an installation vertical plate, and the installation vertical plate is provided with a vertical installation slide rail. The first baffle is slidably installed on the slide rail, and a baffle spring is arranged between the first baffle and the installation vertical plate. The first baffle is slidably installed on the installation vertical plate. When the pressing block presses down the folding plate, the first baffle cooperates with the folding plate to slide downwards.

[0008] The above first baffle has a baffle part and a connecting part. The installation vertical plate installs a long screw, one end of the baffle spring is connected to the long screw, and the other end is connected to the connecting part of the first baffle.

[0009] The above-mentioned mounting vertical plate is fixed with a spring limit block; the spring limit block is provided with a vertical groove, and the vertical groove is fixedly connected to the side of the mounting vertical plate through a short screw; the spring limit block extends forward to abut against the upper surface of the connecting part.

[0010] Compared with the prior art, the first material baffle and the second material baffle of the utility model limit the length of the fabric edge folded into the folding plate, ensuring that the hemming amount is consistent. The second material baffle restricts the fabric edge to always maintain the same length during the movement. The fabric edge is sewn by the sewing needle, and the sewing effect of the fabric lower hem is better. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0012] Figure 2 is an exploded three-dimensional structural schematic diagram of this embodiment.

[0013] Figure 3 is a three-dimensional structural schematic diagram of this embodiment and the folding mechanism and the head cutting mechanism.

[0014] Figure 4 is a three-dimensional structural schematic diagram of this embodiment in cooperation with the head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0016] Figures 1 to 4 The structural schematic diagram of the present utility model is shown.

[0017] The reference numerals therein are: the first material baffle 1, the baffle part 1a, the connecting part 1b, the mounting vertical plate 2, the slide rail 3, the slider 4, the long screw 5, the baffle spring 6, the spring limit block 7, the vertical groove 7a, the second material baffle 8, the bevel edge 8a, the fixing plate 9, the groove 9a, the rotating shaft 10, the mounting flat plate 11, the connecting plate 12, the head baffle 13, the folding plate 14, the folding plate spring 15, the folding plate bracket 16, the downward pressing air cylinder 17, and the pressing cloth block 18.

[0018] As Figure 1 and Figure 2As shown in the figure, the hemming limit mechanism for a bottom swing sewing machine of the present utility model includes a first material stop plate 1 and a second material stop plate 8 installed below the plane of the material folding plate 14, a fixing plate 9 for installing the second material stop plate 8, and a mounting flat plate 11 for installing the first material stop plate 1. The fixing plate 9 and the mounting flat plate 11 are installed on the sewing machine head base. The first material stop plate 1 limits the length of the edge of the fabric folded into the material folding plate 14, and a baffle spring 6 applies an upward pulling force to the first material stop plate 1, causing the first material stop plate 1 to abut against the bottom surface of the material folding plate 14 upward. During the movement of the fabric on the surface of the material folding plate 14, the edge of the fabric is folded towards the bottom surface of the material folding plate 14, and the folded edge of the fabric is limited by the first material stop plate 1 and the second material stop plate 8, which can ensure that the folding amount of the fabric is consistent. The edge of the fabric moves along the first material stop plate 1 and the second material stop plate 8 to below the sewing needle and is sewn by the sewing needle.

[0019] The first material stop plate 1 has a material stop portion 1a and a connecting portion 1b. The material stop portion 1a abuts against the edge of the fabric, and the connecting portion 1b is connected to the baffle spring 6. The mounting vertical plate 2 is provided with a vertical mounting slide rail 3, and the first material stop plate 1 is installed with a slider 4 that cooperates with the slide rail 3. The first material stop plate 1 slides vertically up and down along the slide rail 3. The mounting vertical plate 2 is installed with a long screw 5. One end of the baffle spring 6 is connected to the long screw 5, and the other end is connected to the connecting portion 1b of the first material stop plate 1. The spring limit block 7 is provided with a vertical groove 7a, and a short screw passes through the vertical groove 7a to install the spring limit block 7 on the side of the mounting vertical plate 2. The spring limit block 7 extends forward to abut against the upper surface of the connecting portion 1b. By adjusting the position of the short screw in the vertical groove 7a, the position of the spring limit block 7 can be appropriately adjusted, and thus the sliding amplitude of the first material stop plate 1 up and down can be adjusted.

[0020] When the first material stop plate 1 slides down along the slide rail 3, the baffle spring 6 is in an open state. The baffle spring 6 retracts and pulls the first material stop plate 1 back up along the slide rail 3 until the connecting portion 1b of the first material stop plate 1 abuts against the lower surface of the spring limit block 7.

[0021] The fixing plate 9 is rotatably connected to the rotating shaft 10 of the head cutting mechanism of the sewing machine and rotates with the rotating shaft 10. The second material stop plate 8 is installed on the fixing plate 9, and the second material stop plate 8 and the first material stop plate 1 are in the same horizontal plane. The front end of the second material stop plate 8 has an inclined edge 8a, and the inclined edge 8a just corresponds to the upturned portion of the sewing needle presser foot. The fixing plate 9 is provided with a groove 9a, and the material stop portion 1a of the first material stop plate 1 moves up and down in the groove 9a. The front end of the mounting flat plate 11 is fixedly installed on the mounting vertical plate 2, the rear end of the mounting flat plate 11 is fixedly connected to the lower surface of the head baffle 13, and the connecting plate 12 is installed on the mounting flat plate 11.

[0022] As Figure 3 shown in the figure, the front end of the material folding plate 14 in the material folding mechanism abuts against the upper surface of the first material stop plate 1, and the rear end of the material folding plate 14 is connected with a folding plate spring 15, and the folding plate spring 15 is connected with a folding plate bracket 16.

[0023] As Figure 4 shown, a pressing cylinder 17 is installed on the machine head, and the driving connecting rod of the pressing cylinder 17 is connected to the pressing cloth block 18. The driving connecting rod of the pressing cylinder 17 drives the pressing cloth block 18 to press down the folding plate 14, and the edge of the cloth is folded under the folding plate 14. The folding plate 14 drives the second material blocking plate 8 to move downward, and the edge of the cloth folded under the folding plate 14 abuts against the first material blocking plate 1, restricting the folding edge length of the cloth edge.

[0024] The driving connecting rod of the pressing cylinder 17 drives the pressing cloth block 18 to rise, the folding plate spring 15 drives the folding plate 14 to rise, and the baffle spring 6 drives the first material blocking plate 1 to rise. The first material blocking plate 1 and the second material blocking plate 8 are kept at the same horizontal plane, and the edge of the cloth moves and passes through the second material blocking plate 8, maintaining the same length of the cloth edge, and completing the hem sewing via the sewing needle, and the folding edge lengths of the sewn hem are consistent.

[0025] The best embodiments of the present utility model have been illustrated, and various changes or modifications made by those of ordinary skill in the art will not depart from the scope of the present utility model.

Claims

1. A hem limiter mechanism for a hem sewing machine, comprising a fixing plate (9) and a mounting plate (11) mounted on a sewing machine headstock, characterized in that: The fixed plate (9) is installed with a second baffle plate (8), and the mounting flat plate (11) is installed with a first baffle plate (1). The first baffle plate (1) and the second baffle plate (8) are located below the plane of the folding plate (14); the mounting flat plate (11) is fixed with a mounting vertical plate (2), and the mounting vertical plate (2) is provided with a vertical mounting slide rail (3). The first baffle plate (1) is slidably installed on the slide rail (3), and a baffle spring (6) is provided between the first baffle plate (1) and the mounting vertical plate (2).

2. The folding limit mechanism according to claim 1 is characterized in that: The first baffle plate (1) comprises a baffle portion (1a) and a connecting portion (1b); the vertical plate (2) is mounted with a long screw (5); one end of the baffle spring (6) is connected to the long screw (5) and the other end is connected to the connecting portion (1b) of the first baffle plate (1).

3. The folding limit mechanism according to claim 2 is characterized in that: The mounting plate (2) is fixed with a spring limit block (7); the spring limit block (7) is provided with a vertical groove (7a), and the vertical groove (7a) is fixedly connected to the side of the mounting plate (2) by means of short screws; the spring limit block (7) extends forward and abuts against the upper surface of the connecting portion (1b).

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