Positioning tool for sewing thread bobbins

Abstract

This application provides a positioning fixture for a sewing thread spool, including a core column. One end of the core column has a cavity. The side wall of the cavity has multiple through grooves along the circumference. A slidable sliding block is provided in the cavity. The sliding block has multiple abutment pieces along the circumference. One end of the abutment piece passes through the through groove and extends out to protrude from the outer wall of the core column. A first spring is also provided in the cavity. One end of the first spring abuts against the sliding block. The other end of the core column has multiple end stops that can extend and retract radially along the core column. The end of the end stop away from the abutment piece has a guide slope, and the end of the end stop near the abutment piece has a straight surface. This solves the problem of stable positioning and clamping of cotton sewing thread.

Description

Technical Field

[0001] This utility model relates to the field of positioning cotton sewing thread spools, and in particular to a positioning fixture for sewing thread spools. Background Technology

[0002] Cotton sewing thread is typically wound on a hollow spool to prevent direct contact with the thread during transport and potential damage. For typical automated textile systems, the sewing spool is usually positioned on a cylindrical drive shaft on the system for winding and unwinding. To prevent the spool from falling off, the drive shaft is usually arranged vertically or diagonally, with the spool secured to it by gravity. However, at high winding or unwinding speeds, the spool may bounce up and down, affecting the accuracy of unwinding and winding. This spool positioning method is convenient and low-cost, but due to the lack of a stable clamping function, it cannot be installed horizontally or upside down. Therefore, this type of spool positioning fixture cannot be directly used in robotic arms or some transport mechanisms.

[0003] Another type of positioning device uses clamps, which mainly opens and clamps the inner wall of the hollow spool from the inside, relying on the friction generated by the clamping force to fix the cotton sewing roll in place. However, during rapid movement, the cotton sewing roll can still be thrown out. Utility Model Content

[0004] This invention provides a positioning fixture for sewing thread spools, which solves the problem of stable positioning and clamping of cotton sewing thread.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a positioning fixture for a sewing thread spool, including a core column, a cavity at one end of the core column, a plurality of through grooves along the circumferential direction on the side wall of the cavity, a sliding block in the cavity, a plurality of abutment pieces along the circumferential direction on the sliding block, one end of the abutment piece passing through the through groove and extending out to protrude from the outer wall of the core column, a first spring in the cavity, one end of the first spring abutting against the sliding block, a plurality of end stops that can extend and retract radially along the core column at the other end of the core column, a guide slope at the end of the end stop piece away from the abutment piece, and a straight surface at the end of the end stop piece close to the abutment piece.

[0006] In a preferred embodiment, the end of the core column is provided with a top cap, the top cap is provided with multiple guide grooves along the circumference, a second spring is provided in the guide groove, the second spring abuts against the end of the end stop plate, the end face of the top cap is also provided with multiple strip-shaped through grooves along the circumference, and a paddle part is provided on one side of the end of the end stop plate, the paddle part passes through the strip-shaped through grooves and extends out of the top cap.

[0007] In the preferred embodiment, the end stop plate has external flanges on both sides, the end of the guide groove near the middle of the core column is an open end, and the side walls of the guide groove are provided with lateral grooves, in which the external flanges slide.

[0008] In the preferred embodiment, the other end of the core post is provided with a bottom plug, the other end of the first spring abuts against the bottom plug, and the bottom plug is threadedly connected to the core post.

[0009] In the preferred embodiment, the sliding block is provided with multiple insertion holes along the circumference, and the insertion holes are provided with screw holes. The abutment plate is provided with pin holes, one end of the abutment plate is inserted into the insertion holes, and a locking screw is also provided. The locking screw passes through the pin hole and is threadedly connected to the screw hole.

[0010] The beneficial effects of this utility model are as follows: the positioning core with end stop plates and abutment plates can be sleeved and positioned from inside the spool and clamp both ends of the spool without contact with the outer cotton thread, thus preventing damage to the thread; the end stop plates are provided with guide bevels, allowing the sewing thread spool to be directly inserted and compressed into the end stop plates, and the end stop plates automatically spring up to limit the position when in place, making installation simple; the end stop plates are provided with unlocking paddles, allowing the thread spool to be unlocked from the outside using mechanical or manual means, making removal simple; the clamping mechanism is integrated on the core, allowing it to be installed as a whole on various devices, with a compact design and good portability. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the installation and positioning of the wire reel.

[0013] Figure 2 This is a cross-sectional view of the core column.

[0014] Figure 3 This is a diagram of the external structure of the core pillar.

[0015] Figure 4 This is an exploded view of the internal structure of the core column.

[0016] Figure 5 This is a sectional view of the end stop plate.

[0017] Figure 6 This is a view of the inner side of the top cover.

[0018] In the diagram: Core post 1; Cavity 101; Through groove 102; First spring 103; Fastening screw 104; Abutment piece 2; Pin hole 201; Locking screw 202; End stop plate 3; Guide slope 301; Flat surface 302; Paddle part 303; Outer flange 304; Sliding block 4; Insertion hole 401; Screw hole 402; Bottom cap 5; Top cap 6; Guide groove 601; Second spring 602; Strip through groove 603; Lateral recess 604; Sewing thread spool 7; Sewing thread tube 701. Detailed Implementation

[0019] like Figure 1-6In a positioning fixture for a sewing thread spool, there is a core column 1. One end of the core column 1 is provided with a cavity 101. The side wall of the cavity 101 is provided with a plurality of through grooves 102 along the circumferential direction. A sliding block 4 is provided in the cavity 101. The sliding block 4 is provided with a plurality of abutment pieces 2 along the circumferential direction. One end of the abutment piece 2 passes through the through groove 102 and extends out to protrude from the outer wall of the core column 1. A first spring 103 is also provided in the cavity 101. One end of the first spring 103 abuts against the sliding block 4. The other end of the core column 1 is provided with a plurality of end stop pieces 3 that can be radially extended and retracted along the core column 1. The end of the end stop piece 3 away from the abutment piece 2 is provided with a guide slope 301, and the end of the end stop piece 3 near the abutment piece 2 is provided with a straight surface 302.

[0020] The inner diameter of the sewing thread spool 701 is slightly larger than the outer diameter of the core column 1. The sewing thread spool 701 of the sewing thread roll 7 has a hollow structure. When the sewing thread spool 701 is inserted, the end face of the sewing thread spool 701 presses against the guide slope 301, causing the end stop plate 3 to retract into the core column 1. The sewing thread spool 701 continues to advance, and the end of the sewing thread spool 701 abuts against the abutment plate 2 and gradually compresses the first spring 103 until the other end of the sewing thread spool 701 can no longer cover the end stop plate 3. The end stop plate 3 extends out, and the flat surface 302 abuts against the other end of the sewing thread spool 701. Under the holding force of the first spring 103, the sewing thread spool 701 is always locked to form a stable positioning.

[0021] In a preferred embodiment, the end of the core post 1 is provided with a top cover 6, the top cover 6 is provided with a plurality of guide grooves 601 along the circumference, a second spring 602 is provided in the guide grooves 601, the second spring 602 abuts against the end of the end stop plate 3, the end face of the top cover 6 is also provided with a plurality of strip-shaped through grooves 603 along the circumference, and a prying part 303 is provided on one side of the end of the end stop plate 3, the prying part 303 passes through the strip-shaped through grooves 603 and extends out of the top cover 6.

[0022] The top plug 6 has a central insertion shaft at one end, which can be inserted into the mating hole at the end of the core column 1. The top plug 6 is then locked to the end of the core column 1 using screws.

[0023] The lever part 303 serves as an unlocking device, which can be operated manually or by using a mechanical claw. Simultaneously, the lever part 303 can be moved towards the center of the top cover 6 to cause the end stop plate 3 to retract inward, and the sewing thread spool 701 can be unlocked from the clamped state.

[0024] In the preferred embodiment, the end stop plate 3 has an outer flange 304 on both sides at one end, the guide groove 601 is an open end near the middle of the core column 1, and the guide groove 601 has a lateral sink groove 604 on both sides, and the outer flange 304 slides in the lateral sink groove 604.

[0025] The end stop plate 3 has an overall I-shaped structure and can be directly inserted into the guide groove 601 from the open end of the guide groove 601. Then, the top cover 6 and the end stop plate 3 are fastened to the end face of the core column 1.

[0026] The outer flange 304 serves as a limiting structure for the end stop plate 3, and is locked in the strip-shaped through channel 603 to prevent the end stop plate 3 from coming out.

[0027] The top cap 6 has a chamfered structure for guidance.

[0028] To prevent accidental locking, the outer end of the top cover 6 is provided with a recessed groove, and the protrusion of the lever part 303 does not exceed the upper end surface of the recessed groove.

[0029] In the preferred embodiment, the other end of the core post 1 is provided with a bottom plug 5, the other end of the first spring 103 abuts against the bottom plug 5, and the bottom plug 5 is threadedly connected to the core post 1.

[0030] The bottom cover 5 has a flange with mounting holes at its outer end, which facilitates connection with other mechanisms.

[0031] The side wall of the core column 1 is provided with multiple fastening screws 104 along the circumference. The fastening screws 104 abut against the bottom plug 5 to prevent the bottom plug 5 from loosening.

[0032] It can be seen that the middle section of the core column 1 is a hollow structure, with detachable top cap 6 and bottom cap 5 at both ends, which facilitates the installation of structures such as the abutment plate 2, sliding block 4 and end stop plate 3.

[0033] In a preferred embodiment, the sliding block 4 is provided with a plurality of insertion holes 401 along the circumference, and a screw hole 402 is provided at the insertion hole 401. The abutment plate 2 is provided with a pin hole 201, one end of the abutment plate 2 is inserted into the insertion hole 401, and a locking screw 202 is also provided, which passes through the pin hole 201 and is threadedly connected to the screw hole 402.

[0034] During installation, first insert the sliding block 4 into the cavity 101, and insert the well abutment 2 into the insertion hole 401 through the through groove 102. From the opening end of the cavity 101, use a long screwdriver to install the locking screw 202 to lock the abutment 2. Then, insert the first spring 103, screw the bottom plug 5 into the cavity 101, and tighten the top screw 104.

[0035] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A positioning tool for a sewing bobbin, characterized by: The device includes a core column (1), one end of which is provided with a cavity (101). The side wall of the cavity (101) is provided with multiple through grooves (102) along the circumferential direction. A sliding block (4) is provided in the cavity (101). Multiple abutment pieces (2) are provided in the circumferential direction of the sliding block (4). One end of the abutment piece (2) passes through the through groove (102) and extends out to protrude from the outer wall of the core column (1). A first spring (103) is also provided in the cavity (101). One end of the first spring (103) abuts against the sliding block (4). The other end of the core column (1) is provided with multiple end stop pieces (3) that can be radially extended and retracted along the core column (1). The end of the end stop piece (3) away from the abutment piece (2) is provided with a guide slope (301). The end of the end stop piece (3) close to the abutment piece (2) is provided with a flat surface (302).

2. The positioning tool for a sewing bobbin according to claim 1, characterized in that: The end of the core column (1) is provided with a top cover (6), the top cover (6) is provided with multiple guide grooves (601) along the circumference, the guide grooves (601) are provided with a second spring (602), the second spring (602) abuts against the end of the end stop plate (3), the end face of the top cover (6) is also provided with multiple strip-shaped through grooves (603) along the circumference, and the end of the end stop plate (3) is provided with a paddle part (303) on one side, the paddle part (303) passes through the strip-shaped through grooves (603) and extends out of the top cover (6).

3. The positioning tool for a bobbin of sewing thread according to claim 2, characterized in that: The end stop plate (3) has an outer flange (304) on both sides. The guide groove (601) is open at one end near the middle of the core column (1). The guide groove (601) has a lateral sink groove (604) on both sides. The outer flange (304) slides in the lateral sink groove (604).

4. The positioning tool for a sewing bobbin according to claim 1, wherein: The other end of the core column (1) is provided with a bottom plug (5), and the other end of the first spring (103) abuts against the bottom plug (5). The bottom plug (5) is threadedly connected to the core column (1).

5. The positioning fixture for the sewing thread spool according to claim 1, characterized in that: The sliding block (4) has multiple insertion holes (401) along the circumference. The insertion holes (401) are provided with screw holes (402). The abutment plate (2) is provided with pin holes (201). One end of the abutment plate (2) is inserted into the insertion hole (401). It is also provided with a locking screw (202). The locking screw (202) passes through the pin hole (201) and is threadedly connected to the screw hole (402).

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