Edge covering strip unwinding mechanism of industrial sewing machine

Abstract

The utility model discloses a binding strip unreeling mechanism of an industrial sewing machine, which comprises an unreeling support arranged on one side of the industrial sewing machine, the front side of the unreeling support is rotatably connected with an unreeling shaft, the unreeling shaft is fixedly sleeved with a positioning disc, and the unreeling support is fixedly connected with a limiting assembly supported on the circumference of a cylinder through a fixing plate; the limiting assembly comprises a fixing cylinder fixedly installed on the fixing plate, limiting balls are movably embedded in the lower portion of the interior of the fixing cylinder, compression springs used for supporting the limiting balls are arranged in the fixing cylinder, limiting grooves are formed in the circumference of the cylinder at equal intervals, and the limiting balls are movably clamped in the limiting grooves. The positioning disc is fixedly installed on the unwinding shaft, the elastic limiting ball of the limiting assembly abuts against the limiting groove of the positioning disc, continuous and slow unwinding can be achieved through the unwinding shaft and the edge covering strip reel, loose redundant unwinding edge covering strips are avoided, and the problem that the appearance is affected due to the fact that the edge covering strips are wrinkled is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial sewing machines, in particular to a hemming strip unwinding mechanism of an industrial sewing machine. Background Art

[0002] When an industrial sewing machine sews hemming tape on the edge of a fabric, the tape is unwound via a payout spool and hemming reel. The tape is then folded and guided by the machine's folding assembly, and unwound by the machine's sewing traction. During actual use, workers need to adjust the sewing angle and position, allowing for intermittent sewing. This also requires intermittent unwinding of the payout spool and hemming reel.

[0003] Since the existing industrial sewing machine's hemming strip unwinding shaft can rotate freely, each time the industrial sewing machine pulls the hemming strip, the unwinding shaft and the hemming strip reel will rotate once. Due to inertia, after each pulling, the unwinding shaft and the hemming strip reel will rotate a greater angle, resulting in there is always excess unwound hemming strip in a relaxed state between the hemming strip reel and the industrial sewing machine, which makes it impossible to continuously and slowly unwind the hemming strip, which is not conducive to the folding and guiding of the hemming strip by the folding component of the industrial sewing machine, and easily causes wrinkles in the hemming strip, affecting the appearance, and needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hemming strip unwinding mechanism for an industrial sewing machine, which is used to solve the problem that the hemming strip unwinding shaft of the existing industrial sewing machine has a relatively large degree of rotation freedom and cannot be continuously and slowly unwound.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A hemming strip unwinding mechanism for an industrial sewing machine includes an unwinding bracket mounted on one side of the industrial sewing machine, the unwinding bracket being rotatably connected to an unwinding shaft on the front side, a positioning disk being fixedly sleeved on the unwinding shaft, the positioning disk comprising a coaxially arranged disc and a cylinder located on the back side of the disc, and a limit assembly supported on the circumference of the cylinder being fixedly connected to the unwinding bracket via a fixing plate;

[0007] The limiting assembly includes a fixed cylinder fixedly mounted on a fixed plate, a limiting ball movably embedded in the lower part of the fixed cylinder, a compression spring for supporting the limiting ball is provided inside the fixed cylinder, and limiting grooves are equidistantly provided on the circumference of the cylinder, and the limiting ball is movably engaged in the limiting grooves;

[0008] The edging strip reel is sleeved and installed on the unwinding shaft, and the front end of the unwinding shaft is threadedly installed with a locking nut supported on the front side of the edging strip reel. The front side of the unwinding bracket close to the industrial sewing machine is installed with a limiting roller group above and below the edging strip unwound from the edging strip reel.

[0009] Preferably, a handwheel groove is provided on the circumference of the disc.

[0010] Preferably, a non-slip rubber strip is fixedly connected to the front side of the disc in the radial direction.

[0011] Preferably, the fixed cylinder is located above the cylinder and is arranged vertically.

[0012] Preferably, the upper end of the fixing cylinder is connected to an adjusting bolt supported on the upper end of the compression spring via an internal thread, and the adjusting bolt is a plum blossom bolt.

[0013] Preferably, the locking nut is threadedly sleeved on the surface of the front end of the unwinding shaft, and the locking nut is a rubber-coated plum blossom nut.

[0014] Preferably, the limiting groove is a spherical groove, and the depth does not exceed 2 mm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The utility model fixes a positioning plate on the unwinding shaft, and the elastic limiting ball of the upper limit assembly of the unwinding bracket presses against the limiting groove of the positioning plate. After the edge strip is pulled and unwound, the limiting ball will limit the positioning plate from continuing to rotate inertially, thereby realizing that the unwinding shaft and the edge strip reel can be unwound slowly and continuously, avoiding the occurrence of loose and excess unwound edge strip, and preventing the edge strip from wrinkling and affecting the appearance. The utility model solves the problem that the edge strip unwinding shaft of the existing industrial sewing machine has a large degree of freedom of rotation and cannot be unwound slowly and continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the front view of the utility model;

[0018] Figure 2 This is a left view of the corresponding position of the unwinding shaft of the utility model;

[0019] Figure 3 This is a left sectional view of the corresponding position of the unwinding shaft of the utility model;

[0020] Figure 4 This is the left side view of the positioning plate of the utility model;

[0021] Figure 5 This is a front view of the positioning plate of the utility model;

[0022] Figure 6This is a front cross-sectional view of the limit assembly of the utility model.

[0023] In the figure: 1. Industrial sewing machine; 2. Unwinding bracket; 3. Unwinding shaft; 4. Positioning disk; 401. Disc; 402. Cylinder; 403. Limiting groove; 404. Handwheel groove; 405. Anti-slip rubber strip; 5. Fixing plate; 6. Limiting assembly; 601. Fixing cylinder; 602. Limiting ball; 603. Compression spring; 604. Adjusting bolt; 7. Edging strip reel; 8. Locking nut; 9. Edging strip; 10. Limiting roller group. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1-6 As shown, the utility model provides a technical solution: a hemming strip unwinding mechanism for an industrial sewing machine, comprising an unwinding bracket 2 mounted on one side of an industrial sewing machine 1, a front side of the unwinding bracket 2 being rotatably connected to an unwinding shaft 3, a positioning disk 4 being fixedly sleeved on the unwinding shaft 3, and the positioning disk 4 comprising a coaxially arranged disc 401 and a cylinder 402 located on the back side of the disc 401;

[0026] A handwheel groove 404 is provided on the circumference of the disc 401, which is convenient for holding the positioning disc 4 by hand to prevent the unwinding shaft 3 from rotating and to disassemble and assemble the locking nut 8. An anti-slip rubber strip 405 is fixedly connected to the front of the disc 401 in the radial direction to improve the fixing effect of the edging strip reel 7 and play a role in preventing slipping. A limit assembly 6 supported on the circumference of the cylinder 402 is fixedly connected to the unwinding bracket 2 through a fixing plate 5;

[0027] The limiting assembly 6 includes a fixed cylinder 601 fixedly mounted on the fixed plate 5, a limiting ball 602 is movably embedded in the lower part of the fixed cylinder 601, a compression spring 603 for supporting the limiting ball 602 is provided inside the fixed cylinder 601, the fixed cylinder 601 is located above the cylinder 402 and is vertically arranged, the upper end of the fixed cylinder 601 is connected to an adjusting bolt 604 supported on the upper end of the compression spring 603 through an internal thread, and the adjusting bolt 604 is a plum blossom bolt, which is convenient for twisting the upper adjusting bolt 604 to change the extrusion force received by the limiting ball 602, so as to change the limiting force on the positioning disk 4 and the unwinding shaft 3;

[0028] Limiting grooves 403 are equidistantly provided on the circumference of the cylinder 402, and the limiting balls 602 are movably engaged in the limiting grooves 403. The limiting grooves 403 are spherical grooves with a depth not exceeding 2 mm, so that the limiting balls 602 can squeeze and limit the position, and can also drive the unwinding shaft 3 and the positioning disk 4 to rotate when the edge strip 9 is pulled.

[0029] The edging strip reel 7 is installed on the unwinding shaft 3, and the front end of the unwinding shaft 3 is threadedly installed with a locking nut 8 supported on the front side of the edging strip reel 7. The locking nut 8 is threadedly installed on the surface of the front end of the unwinding shaft 3, and the locking nut 8 is a rubber-coated plum blossom nut, which is convenient for twisting operation. The front side of the unwinding bracket 2 close to the industrial sewing machine 1 is equipped with a limiting roller group 10 above and below the edging strip 9 unwound from the edging strip reel 7.

[0030] Working principle:

[0031] Hold the positioning disc 4 through the hand wheel groove 404 to fix the unwinding shaft 3, twist and remove the locking nut 8, install the hemming strip reel 7 and then install the locking nut 8, the locking nut 8 and the positioning disc 4 clamp the hemming strip reel 7, unwind the hemming strip 9 from the hemming strip reel 7, pass it between the two limiting roller groups 10 and insert it into the folding component of the industrial sewing machine 1, when the industrial sewing machine 1 is working, pull the hemming strip 9 to make the hemming strip reel 7 and the unwinding shaft 3 rotate to unwind, and the limiting ball 60 of the limiting component 6 Under the pressure of the compression spring 603, the limiting ball 602 is movably engaged in the limiting groove 403 on the cylinder 402 of the positioning disk 4. When the positioning disk 4 rotates following the unwinding shaft 3, the limiting ball 602 rolls along the limiting groove 403. When the industrial sewing machine 1 stops and stops pulling the hemming strip 9, the limiting ball 602 is engaged in the nearest limiting groove 403, preventing the hemming strip reel 7 from continuing to rotate due to inertia, thereby achieving the effect of continuous and slow unwinding of the unwinding shaft 3 and the hemming strip reel 7.

[0032] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hemming strip unwinding mechanism for an industrial sewing machine, comprising an unwinding bracket (2) mounted on one side of the industrial sewing machine (1), characterized in that: The front side of the unwinding bracket (2) is rotatably connected to an unwinding shaft (3), a positioning disc (4) is fixedly sleeved on the unwinding shaft (3), the positioning disc (4) comprises a coaxially arranged disc (401) and a cylinder (402) located on the back side of the disc (401), and a limiting component (6) supported on the circumference of the cylinder (402) is fixedly connected to the unwinding bracket (2) via a fixing plate (5); The limiting assembly (6) comprises a fixed cylinder (601) fixedly mounted on the fixed plate (5), a limiting ball (602) being movably embedded in the lower portion of the fixed cylinder (601), a compression spring (603) for supporting the limiting ball (602) being provided inside the fixed cylinder (601), limiting grooves (403) being equidistantly provided on the circumference of the cylinder (402), and the limiting ball (602) being movably engaged in the limiting groove (403); The unwinding shaft (3) is sleeved with an edge strip reel (7), and a locking nut (8) supported on the front of the edge strip reel (7) is threadedly installed on the front end of the unwinding shaft (3). A limiting roller group (10) is installed on the front side of the unwinding bracket (2) close to the industrial sewing machine (1) to clamp the edge strip (9) unwound from the edge strip reel (7) above and below.

2. The hemming strip unwinding mechanism for an industrial sewing machine according to claim 1, characterized in that: A handwheel groove (404) is provided on the circumference of the disc (401).

3. The hemming strip unwinding mechanism for an industrial sewing machine according to claim 2, characterized in that: An anti-slip rubber strip (405) is fixedly connected to the front side of the disc (401) in the radial direction.

4. The hemming strip unwinding mechanism for an industrial sewing machine according to claim 1, characterized in that: The fixed cylinder (601) is located above the cylinder (402) and is arranged vertically.

5. The hemming strip unwinding mechanism for an industrial sewing machine according to claim 4, characterized in that: The upper end of the fixing cylinder (601) is connected to an adjusting bolt (604) supported on the upper end of the compression spring (603) via an internal thread, and the adjusting bolt (604) is a plum blossom bolt.

6. The hemming strip unwinding mechanism for an industrial sewing machine according to claim 1, characterized in that: The locking nut (8) is threadedly sleeved and mounted on the surface of the front end of the unwinding shaft (3), and the locking nut (8) is a rubber-coated plum nut.

7. The hemming strip unwinding mechanism for an industrial sewing machine according to claim 1, characterized in that: The limiting groove (403) is a spherical groove, and the depth does not exceed 2 mm.

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