A type of overlock machine that automatically aligns the ends of fabric

Abstract

This utility model discloses an automatic fabric end-aligning overlock sewing machine, including an upper and lower misalignment correction device and an upper and lower fabric piece sensing device. The upper and lower misalignment correction device includes a first and second misalignment correction component capable of vertical movement. The upper and lower fabric piece sensing device includes a second mounting base located on one side of the fabric movement path, the second mounting base having a second partition plate, a third sensor for sensing the rear edge of the upper fabric piece above the second partition plate, and a fourth sensor for sensing the rear edge of the lower fabric piece below the first partition plate. This utility model detects the rear edge of the upper and lower fabric pieces through the upper and lower fabric piece sensing device and controls the feeding speed of the upper and lower fabric pieces through the upper and lower misalignment correction device, ensuring that the rear edges of the upper and lower fabric pieces are aligned during the sewing process, thereby improving sewing quality.

Description

Technical Field

[0001] This utility model belongs to the field of garment processing technology, specifically a transparency machine for automatically aligning the ends of fabric. Background Technology

[0002] In garment production, a double-layered large piece of fabric needs to be overlocked to form the garment's overall shape. This large piece of fabric consists of left and right side panels, which are processed sequentially during the overlocking process. To improve efficiency, the left and right side panels are sewn together before the overlocking, creating a seam. Then, the seams of the two large layers of fabric are aligned, and the fabric is fed to the sewing machine head at a uniform speed for sewing.

[0003] Current garment production typically involves manually aligning two large pieces of fabric and feeding them to the sewing machine head at a uniform speed. In practice, the seams of the two large pieces of fabric are prone to misalignment during the transfer process, affecting the sewing effect. At the same time, manual operation requires a high level of skill from the workers, and timely manual adjustment is needed after misalignment occurs, which also reduces sewing efficiency. Summary of the Invention

[0004] This invention addresses the technical problem of excessively large fabric widths causing misalignment of the rear edges of the fabric during feeding, which affects sewing quality. It provides an automatic fabric end-aligning overlock machine that can sense and align the rear edges of the upper and lower layers of fabric, thereby improving sewing quality.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an automatic fabric end-aligning overlock machine, including an upper and lower correction offset device and an upper and lower material sheet sensing device; the upper and lower correction offset device includes a first correction component and a second correction component that can move up and down; the upper and lower material sheet sensing device includes a second mounting base located on one side of the fabric movement path, the second mounting base is provided with a second partition plate, a third sensor for sensing the rear edge of the upper fabric sheet is provided above the second partition plate, and a fourth sensor for sensing the rear edge of the lower fabric sheet is provided below the first partition plate.

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

[0007] The aforementioned upper and lower deviation correction device includes a deviation correction mounting frame and a third partition plate mounted on the deviation correction mounting frame; the first deviation correction component is located above the third partition plate, and the second deviation correction component is located below the third partition plate.

[0008] The first correction assembly includes a first guide correction wheel, a first correction wheel mounting frame that can be raised and lowered, and a third lifting cylinder for driving the first correction wheel mounting frame to move up and down; the second correction assembly includes a second guide correction wheel, a second correction wheel mounting frame that can be raised and lowered, and a fourth lifting cylinder for driving the second correction wheel mounting frame to move up and down.

[0009] The first guide correction wheel is equipped with a first drive motor for driving it to rotate in the main body fabric feeding direction and controlling the speed of the main body fabric, and a first correction motor for driving the correction structure to correct the position of the main body fabric in the direction perpendicular to the main body fabric feeding direction; the second guide correction wheel is equipped with a second drive motor for driving it to rotate in the main body fabric feeding direction and controlling the speed of the main body fabric, and a second correction motor for driving the correction structure to correct the position of the main body fabric in the direction perpendicular to the main body fabric feeding direction.

[0010] The upper and lower surfaces of the third partition plate are respectively provided with grooves that match the shapes of the first guide wheel and the second guide wheel.

[0011] Compared with the prior art, the automatic fabric end alignment overlock machine of this utility model detects the rear end edges of the upper and lower layers of fabric through the upper and lower material sheet sensing device, and controls the feeding speed of the upper and lower layers of fabric through the upper and lower deviation correction device, so that the rear end edges of the upper and lower layers of fabric are aligned during the conveying and sewing process, thereby improving the sewing quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this embodiment.

[0013] Figure 2 yes Figure 1 A schematic diagram of the back structure.

[0014] Figure 3 This is a three-dimensional structural diagram of the large-body fabric feeding device.

[0015] Figure 4 This is a three-dimensional structural diagram of the upper and lower bone seam induction pulling device.

[0016] Figure 5 This is a three-dimensional structural diagram of the loading and unloading sheet sensing device.

[0017] Figure 6 This is a three-dimensional structural diagram of the upper and lower deviation correction device.

[0018] Figure 7 yes Figure 6 A structural diagram from another angle. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0020] Figures 1 to 7 The diagram shown is a structural schematic of this utility model.

[0021] The attached figures are labeled as follows: frame 1, sewing machine head 2, feed roller 301, first conveyor belt 302, first motor 303, conveyor mounting frame 304, material pulling synchronous belt 401, second motor 402, seam sensor mounting base 403, material pulling synchronous wheel 404, material pulling guide rail 405, first partition plate 406, first pressure sensing wheel 407, second pressure sensing wheel 408, first lifting plate 409, first lifting cylinder 410, first swing block 411, first sensor 412, first limit block 413, second limit block 414, first... Tension spring 415, second sensor 416, second lifting cylinder 417, second mounting base 501, second partition plate 502, third sensor 503, fourth sensor 504, correction mounting bracket 601, third partition plate 602, first guide correction wheel 603, first correction wheel mounting bracket 604, third lifting cylinder 605, second guide correction wheel 606, second correction wheel mounting bracket 607, fourth lifting cylinder 608, first drive motor 609, first correction motor 610, second drive motor 611, second correction motor 612.

[0022] This utility model discloses an automatic overlock sewing machine, comprising a frame 1. The frame 1 is equipped with a transversely arranged overlock fabric feeding device. On one side of the overlock fabric feeding device are a sewing machine head 2, an upper and lower deviation correction device, an upper and lower fabric sheet sensing device, and an upper and lower seam sensing and pulling device that can move along the conveying direction of the overlock fabric feeding device. The upper and lower deviation correction device is located between the sewing machine head 2 and the upper and lower seam sensing and pulling device, and is close to the sewing machine head 2. The sewing control system is electrically connected to the sewing machine head 2, the upper and lower deviation correction device, the upper and lower seam sensing and pulling device, and the upper and lower fabric sheet sensing device.

[0023] The fabric feeding device includes multiple feeding rollers 301 mounted on a conveyor mounting frame 304, and a first conveyor belt 302 sleeved on the outside of the feeding rollers 301. The conveyor mounting frame 304 is equipped with a first motor 303 that drives the first conveyor belt 302 to rotate. The feeding rollers 301 then drive the first conveyor belt 302 to rotate.

[0024] The double-layered body fabric is placed on the first conveyor belt 302, and the first motor 303 drives the first conveyor belt 302 to rotate. The sewing machine head 2, the upper and lower correction misalignment device, the upper and lower seam sensing and pulling device, and the upper and lower sheet sensing device are located on the side of the double-layered body fabric to be sewn. The first conveyor belt 302 is used to move the body fabric, ensuring the sewing area passes the sewing machine head 2. The feeding speed of the first conveyor belt 302 is consistent with the feeding speed of the feed dogs of the sewing machine head 2. During the sewing process, the seam is located in the middle of the upper and lower layers of fabric, and the upper and lower seam sensing and pulling device aligns the seams of the upper and lower layers of fabric. The upper and lower sheet sensing device is located on the feeding path of the body fabric and detects the rear edge of the body fabric, aligning the rear edges of the upper and lower sheets.

[0025] The upper and lower joint sensing material pulling device includes a material pulling timing belt 401, a second motor 402 that drives the material pulling timing belt 401 to rotate, and a joint sensing mounting base 403 connected to the material pulling timing belt 401. Two material pulling timing pulleys 404 are mounted on the outside of the conveyor mounting frame 304, and the material pulling timing belt 401 is mounted on the two material pulling timing pulleys 404. The joint sensing mounting base 403 is slidably mounted on the material pulling guide rail 405 and is fixedly connected to the material pulling timing belt 401. One of the material pulling timing pulleys 404 is connected to the second motor 402 through a transmission structure, and the second motor 402 can drive the joint sensing mounting base 403 to move along the material pulling guide rail 405.

[0026] The seam-seam sensor mounting base 403 is equipped with a first partition plate 406, which is positioned between two layers of body fabric to be sewn during operation. Above the first partition plate 406 are a first pressure sensor wheel 407 for detecting the seam of the upper body fabric and a first limiting block 413 for locking the seam of the upper body fabric. Below the first partition plate 406 are a second pressure sensor wheel 408 for detecting the seam of the lower body fabric and a second limiting block 414 for locking the seam of the lower body fabric. The second pressure sensor wheel 408 and the first pressure sensor wheel 407 are arranged symmetrically with respect to the first partition plate 406.

[0027] The bone joint sensor mounting base 403 is equipped with a first lifting plate 409 that can move up and down. A first limiting block 413 is fixedly installed on one side of the first lifting plate 409 and located above the first partition plate 406. The bone joint sensor mounting base 403 is equipped with a first lifting cylinder 410. The drive rod of the first lifting cylinder 410 is connected to the first lifting plate 409, and the first lifting cylinder 410 can drive the first lifting plate 409 to slide up and down.

[0028] A first swing block 411 is rotatably mounted on the front side of the first lifting plate 409. The first swing block 411 has a first mounting portion extending downward, and a first pressure sensing wheel 407 is rotatably mounted on the first mounting portion. The first swing block 411 has a first sensing portion extending upward, and the first lifting plate 409 is provided with a first sensor 412 for sensing the position of the first sensing portion.

[0029] A first tension spring 415 is provided between the first swing block 411 and the first lifting plate 409. One end of the first tension spring 415 is connected to the first swing block 411, and the other end of the first tension spring 415 is connected to the first lifting plate 409. The first tension spring 415 applies tension, causing the first pressing sensing wheel 407 to press tightly against the surface of the first partition plate 406. When the upper body fabric seam passes the first pressing sensing wheel 407, the seam lifts the first pressing sensing wheel 407, and the first swing block 411 rotates, causing the first sensor 412 to detect the seam signal.

[0030] During operation, the first lifting cylinder 410 drives the first lifting plate 409 to slide downward, so that the first pressing sensing wheel 407 and the first limiting block 413 are close to the first partition plate 406, sensing whether the upper body fabric seam is in place and locking.

[0031] Correspondingly, the joint sensor mounting base 403 is equipped with a second lifting plate that can move up and down. A second limiting block 414 is fixedly installed on one side of the second lifting plate and located below the first partition plate 406. The joint sensor mounting base 403 is equipped with a second lifting cylinder 417. The drive rod of the second lifting cylinder 417 is connected to the second lifting plate, and the second lifting cylinder 417 can drive the second lifting plate to slide up and down. During operation, the second lifting cylinder 417 drives the second lifting plate to rise, so that the second pressing sensing wheel 408 and the second limiting block 414 are in an upward and close-to-the-first partition plate 406 state, sensing whether the joint of the lower body fabric is in place and locked.

[0032] A second swing block is rotatably mounted on the front side of the second lifting plate. The second swing block has an upwardly extending second mounting portion, and a second pressure sensing wheel 408 is rotatably mounted on the second mounting portion. The second swing block has an upwardly extending second sensing portion, and the second lifting plate is provided with a second sensor 416 for sensing the position of the second sensing portion.

[0033] A second tension spring is provided between the second swing block and the second lifting plate. One end of the second tension spring is connected to the second swing block, and the other end of the second tension spring is connected to the second lifting plate.

[0034] After the upper body fabric seam passes the first pressing sensor wheel 407, it is stopped by the first limiting block 413, thus fixing the position of the upper body fabric seam. When the lower body fabric seam passes the second pressing sensor wheel 408, the second sensor 416 detects the seam signal and is subsequently stopped by the second limiting block 414, thus fixing the position of the lower body fabric seam. The first limiting block 413 and the second limiting block 414 are aligned vertically, thus aligning the positions of the upper and lower body fabric seams.

[0035] When neither the first sensor 412 nor the second sensor 416 detects a seam signal, or when only one of them detects a seam signal, the second motor 402 does not operate, and the position of the upper and lower seam sensing and pulling devices is fixed, waiting for the seams of the upper and lower layers of fabric to align. When both the first sensor 412 and the second sensor 416 detect a seam signal, the seams of the upper and lower body fabrics are aligned, and the second motor 402 controls the upper and lower seam sensing and pulling devices to move along the pulling guide rail 405. The moving speed of the upper and lower seam sensing and pulling devices is the same as the speed of the first conveyor belt 302 and the feed dog speed of the sewing machine head 2, ensuring that the upper and lower seams of the two body fabrics are always aligned during the feeding and sewing process. The sewing control system is equipped with a pulling drive control module that receives the detection signals from the first sensor 412 and the second sensor 416, and sends a control signal to the second motor 402 after receiving both detection signals.

[0036] The upper and lower body fabric sensing device includes a second mounting base 501 disposed on the movement path of the upper body fabric. The second mounting base 501 is provided with a second partition plate 502, which is located between the two layers of upper body fabric to be sewn during operation. Above the second partition plate 502 is a third sensor 503 for sensing the rear edge of the upper body fabric, and below the first partition plate 406 is a fourth sensor 504 for sensing the rear edge of the lower body fabric. After the upper and lower body fabrics are sewn together at the seam, the rear edges of the upper and lower body fabrics will move to the second partition plate 502. The third sensor 503 and the fourth sensor 504 detect the rear edges of the upper and lower body fabrics respectively, and calculate the distance difference between the rear edges of the upper and lower body fabrics based on the time difference between the detection signals of the third sensor 503 and the fourth sensor 504.

[0037] The vertical correction device includes a correction mounting frame 601, a third partition plate 602 mounted on the correction mounting frame 601, a first correction component mounted above the third partition plate 602, and a second correction component mounted below the third partition plate 602. The first correction component includes a first guide correction wheel 603, a liftable first correction wheel mounting frame 604, and a third lifting cylinder 605 for driving the first correction wheel mounting frame 604 up and down. The second correction component includes a second guide correction wheel 606, a liftable second correction wheel mounting frame 607, and a fourth lifting cylinder 608 for driving the second correction wheel mounting frame 607 up and down.

[0038] The first guide correction wheel 603 and the second guide correction wheel 606 employ publicly available prior art. The first guide correction wheel 603 is connected to a first drive motor 609 for driving its rotation in the main fabric feeding direction and controlling the speed of the main fabric, and simultaneously to a first correction motor 610 for driving the correction structure to correct the position of the main fabric in a direction perpendicular to the main fabric feeding direction. Correspondingly, the second guide correction wheel 606 is connected to a second drive motor 611 for driving its rotation in the main fabric feeding direction and controlling the speed of the main fabric, and simultaneously to a second correction motor 612 for driving the correction structure to correct the position of the main fabric in a direction perpendicular to the main fabric feeding direction. The sewing control system includes an end alignment control module that receives detection signals from a third sensor 503 and a fourth sensor 504, calculates the distance difference between the end edges of the upper and lower main fabric layers based on the time difference of the received signals, and sends control signals to the first drive motor 609 and the second drive motor 611 to adjust the feeding speed of the upper and lower main fabric layers to align the end edges. Under the control of the control system, the first drive motor 609, the first correction motor 610, the second drive motor 611, and the second correction motor 612 maintain the alignment of the sides of the upper and lower layers of the main body fabric.

[0039] The upper and lower surfaces of the third partition plate 602 are respectively provided with grooves that match the shape of the first guide correction wheel 603 and the second guide correction wheel 606. Under the control of the corresponding third lifting cylinder 605 and fourth lifting cylinder 608, the first guide correction wheel 603 and the second guide correction wheel 606 cooperate with the grooves to press the main body fabric, thereby realizing the feeding and correction control of the main body fabric.

[0040] 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 transparency machine for automatically aligning the ends of fabric, characterized in that: It includes an upper and lower deviation correction device and an upper and lower material sheet sensing device; the upper and lower deviation correction device includes a first correction component and a second correction component that can move up and down; the upper and lower material sheet sensing device includes a second mounting base (501) located on one side of the main body fabric movement path, the second mounting base (501) is provided with a second partition plate (502), a third sensor (503) for sensing the rear edge of the upper main body fabric sheet is provided above the second partition plate (502), and a fourth sensor (504) for sensing the rear edge of the lower main body fabric sheet is provided below the first partition plate (406).

2. The copy machine according to claim 1, characterized in that: The aforementioned upper and lower deviation correction device includes a deviation correction mounting frame (601) and a third partition plate (602) mounted on the deviation correction mounting frame (601); the first deviation correction component is located above the third partition plate (602), and the second deviation correction component is located below the third partition plate (602).

3. The copy machine according to claim 2, characterized in that: The first correction assembly includes a first guide correction wheel (603), a liftable first correction wheel mounting frame (604), and a third lifting cylinder (605) for driving the first correction wheel mounting frame (604) to move up and down; the second correction assembly includes a second guide correction wheel (606), a liftable second correction wheel mounting frame (607), and a fourth lifting cylinder (608) for driving the second correction wheel mounting frame (607) to move up and down.

4. The copy machine according to claim 3, characterized in that: The first guide correction wheel (603) is equipped with a first drive motor (609) for driving it to rotate in the main body fabric feeding direction and controlling the speed of the main body fabric, and a first correction motor (610) for driving the correction structure to correct the position of the main body fabric in the direction perpendicular to the main body fabric feeding direction; the second guide correction wheel (606) is equipped with a second drive motor (611) for driving it to rotate in the main body fabric feeding direction and controlling the speed of the main body fabric, and a second correction motor (612) for driving the correction structure to correct the position of the main body fabric in the direction perpendicular to the main body fabric feeding direction.

5. The copy machine according to claim 4, characterized in that: The upper and lower surfaces of the third partition plate (602) are respectively provided with grooves that match the shape of the first guide wheel (603) and the second guide wheel (606).

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