Shoelace hole punching device for wear-resistant safety shoes

Through the design of the adjustment component and the clamping component, the simultaneous punching of multiple holes at the safety shoe is achieved, solving the problems of low efficiency and uneven hole positions in the prior art, and improving the punching efficiency and aesthetics.

CN223275015UActive Publication Date: 2025-08-29ZHEJIANG BAISU SHOES CO LTD
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Patent Information

Application Number
CN202422116404.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-30
Publication Date
2025-08-29
Estimated Expiration
2034-08-30

AI Technical Summary

Technical Problem

The existing safety shoe hole punching device adopts a single punch, which has low efficiency and uneven hole spacing, which affects the aesthetics.

Method used

Adjustment components are used to adjust the mounting plate spacing, punch holes simultaneously through multiple drill bits, and fix the upper by clamping the assembly and pressing the assembly to ensure drilling accuracy and efficiency.

Benefits of technology

Improves the hole drilling efficiency, ensures the consistent spacing between holes, and improves the aesthetics and applicability of the device.

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Abstract

The utility model discloses a shoelace hole punching device for wear-resistant safety shoes in the technical field of shoelace hole processing, which comprises a mounting seat, vertical plates are connected to two ends of the top of the mounting seat, a top plate is mounted at the tops of the two vertical plates, a second electric push rod is mounted at the bottom of the top plate, and an adjusting component is arranged at the output end of the second electric push rod. Clamping assemblies are arranged at the front end and the rear end of the bottom of the adjusting assembly, locking assemblies are arranged on the right sides of the two clamping assemblies, mounting plates are mounted at the bottoms of the two clamping assemblies, a plurality of drill bits are connected to the bottoms of the two mounting plates, and clamping assemblies are arranged on the two sides of the mounting base. According to the shoelace punching device, the clamping assembly, the mounting plates, the drill bits and the adjusting assembly are arranged in a matched mode, the distance between the mounting plates is adjusted and controlled through the adjusting assembly, the drill bits can be conveniently adjusted to the position, needing to be punched, above a vamp, the device can punch a plurality of shoelace holes at the same time through cooperation of the multiple drill bits, and the punching efficiency of the device is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of shoelace hole processing, in particular to a shoelace hole punching device for wear-resistant safety shoes. Background Art

[0002] Safety shoes are a general term for safety shoes and protective shoes. They generally refer to shoes worn in different work environments that protect the feet and legs from foreseeable injuries. They are widely used in factories and construction sites with complex environments and have good performance. As people's awareness of foot protection increases, the demand for safety shoes is gradually increasing. Safety shoes often contain shoelace holes for tying shoelaces, so a punching device is required in the production process of safety shoes.

[0003] Patent publication number CN215603580U discloses a punching device for processing shoelace holes, comprising a support assembly and a punching assembly. The support assembly comprises a top seat, a base, a mounting plate, and a lifting device. The top seat and the base are both arranged horizontally. The lifting device is arranged between the top seat and the base. The mounting plate is horizontally mounted in the middle of the lifting device. The punching assembly comprises a first motor, a drill bit, and an electric soldering iron. The first motor is mounted on the upper side of the mounting plate, the drill bit is arranged on the lower side of the mounting plate, the output end of the first motor is connected to the drill bit, and the electric soldering iron is arranged on the outside of the upper end of the drill bit. This solution, by arranging the electric soldering iron on the drill bit, can heat-seal the scraps on the perforation, thereby improving the punching quality. However, the above-mentioned punching device uses a single punching method, which not only has low punching efficiency but also has different spacing between each hole position, affecting the appearance. Summary of the Invention

[0004] In order to improve the problem that the punching device mentioned above adopts a single punching method, which not only has low punching efficiency but also has different sizes of spacing between each hole, affecting the appearance, the utility model provides a shoelace hole punching device for wear-resistant safety shoes.

[0005] The utility model provides a shoelace hole punching device for wear-resistant safety shoes, which adopts the following technical solutions:

[0006] A shoelace hole punching device for wear-resistant safety shoes includes a mounting seat, both ends of the top of the mounting seat are connected to vertical plates, the tops of two groups of vertical plates are installed with top plates, the bottom of the top plate is installed with a second electric push rod, the output end of the second electric push rod is provided with an adjustment component, the front and rear ends of the bottom of the adjustment component are provided with clamping components, the right sides of the two groups of clamping components are provided with locking components, the bottoms of the two groups of clamping components are installed with mounting plates, the bottoms of the two groups of mounting plates are connected to several drill bits, and clamping components are provided on both sides of the mounting seat.

[0007] By adopting the above technical solution, the shoe upper is fixed by two sets of clamping components, the distance between the two sets of mounting plates is adjusted by the adjusting component, and the mounting plate drives the drill bit to move until several drill bits move to the positions where holes need to be punched on the shoe upper. Then, the second electric push rod is controlled to extend and drive the adjusting component to move downward. The downward movement of the adjusting component drives the mounting plate and the drill bit to move downward through the clamping component to punch holes in the shoe upper, so that the device can punch multiple shoelace holes at the same time, thereby improving the punching efficiency of the device.

[0008] Optionally, a guide assembly is provided between the adjustment assembly and the top plate, and the guide assembly includes two groups of guide rods, which are respectively installed at the two ends of the top of the adjustment assembly, and the tops of the two groups of guide rods extend out of the top plate, and the surface of the top plate is provided with guide holes that match the guide rods.

[0009] By adopting the above technical solution, when the adjusting assembly moves up and down, it can drive the guide rod to slide in the guide hole, thereby supporting the adjusting assembly, making the adjusting assembly more stable when lifting and lowering.

[0010] Optionally, the adjustment component includes a U-shaped seat, which is installed at the output end of the second electric push rod, and a bidirectional screw rod is connected between the U-shaped seats through a bearing, and a servo motor for driving the bidirectional screw rod to rotate is installed on the outer side of the U-shaped seat, and both ends of the outer wall of the bidirectional screw rod are screwed with nuts, and the tops of the two groups of nuts are connected to limit blocks, and both ends of the inner top wall of the U-shaped seat are provided with limit grooves that slide with the limit blocks, and the bottoms of the two groups of nuts are connected to connecting plates.

[0011] By adopting the above technical solution, the servo motor drives the bidirectional screw to rotate when it starts. Under the sliding cooperation of the limit block and the limit groove, the bidirectional screw rotates to drive the two sets of nuts to move left and right. The movement of the nut drives the mounting plate and the drill bit below to move left and right through the connecting plate, thereby adjusting the distance between the two sets of mounting plates, making it convenient to adjust several drill bits to the position that needs to be opened on the shoe upper.

[0012] Optionally, the snap-on assembly includes two groups of groove bodies, which are respectively installed on the bottoms of two groups of connecting plates, and the tops of the two groups of mounting plates are connected with protrusions that are plugged into the groove bodies.

[0013] By adopting the above technical solution, the installation plate can be easily assembled and disassembled through the plug-in cooperation between the groove body and the protrusion.

[0014] Optionally, the locking assembly includes two groups of support plates, which are respectively installed on the right sides of the two groups of groove bodies, and a T-shaped rod is passed through the middle of the two groups of support plates. A movable plate is installed at one end of the two groups of T-shaped rods close to the protrusion, and a positioning spring is sleeved on the outer wall of the two groups of T-shaped rods, and the positioning spring is located between the movable plate and the support plate. The ends of the two groups of movable plates facing away from the T-shaped rod are connected to the insertion rod, and the right side of the two groups of protrusions is provided with a slot that cooperates with the insertion rod.

[0015] By adopting the above technical solution, when it is necessary to release the fixing effect of the insertion rod on the protrusion, pull the T-shaped rod to the right, the T-shaped rod drives the movable plate to move to the right and compresses the positioning spring, and the movable plate moves to the right and drives the insertion rod to move to the right until the insertion rod is separated from the slot.

[0016] Optionally, the clamping assembly includes two sets of frames, the two sets of frames are respectively installed on both sides of the mounting base, the first electric push rods are installed inside the two sets of frames, the output ends of the two sets of first electric push rods are installed with a card seat, the bottoms of the two sets of card seats are connected to movable blocks, and both ends of the inner bottom wall of the mounting base are provided with movable grooves that slide with the movable blocks;

[0017] The tops of the two groups of card seats are both provided with pressing components.

[0018] By adopting the above technical solution, the frame is extended and retracted to drive the card seat to move left and right. When the card seat moves, it drives the movable block to slide in the movable groove, making the card seat more stable when moving. The distance between the two groups of card seats can be adjusted, so that the device can fix shoe uppers of different specifications.

[0019] Optionally, the clamping assembly includes two groups of screws, which are respectively screwed on the tops of the two groups of clamping seats. A turntable is installed on the tops of the two groups of screws, and the bottoms of the two groups of screws are connected to pressure plates through bearings. The two groups of pressure plates are connected to sliders on the side away from the center of the mounting seat, and the inner sides of the two groups of clamping seats are provided with sliding rails that slide with the sliders.

[0020] By adopting the above technical solution, the staff rotates the turntable, and the rotation of the turntable drives the screw to rotate. Under the sliding cooperation of the slider and the slide rail, the screw rotates to drive the pressure plate to move downward until the pressure plate presses and fixes the two ends of the shoe upper, so as to minimize the displacement of the shoe upper during punching.

[0021] In summary, the present invention has at least one of the following beneficial effects:

[0022] By coordinating the clamping assembly, the mounting plate, the drill bit and the adjustment assembly, and adjusting the spacing between the mounting plates through the adjustment assembly, the drill bit can be conveniently adjusted to the position where a hole needs to be punched above the shoe upper. By coordinating several drill bits, the device can punch multiple shoelace holes at the same time, thereby improving the punching efficiency of the device.

[0023] By coordinating the clamping assembly and the pressing assembly, the device can conveniently fix shoe uppers of different specifications, avoid displacement of the shoe uppers during punching, and improve the punching effect of the device.

[0024] Through the coordinated arrangement of the clamping assembly and the locking assembly, when it is necessary to punch a different number of shoelace holes on the safety shoes, the fixing effect of the clamping assembly is released by the locking assembly, thereby facilitating the disassembly and replacement of the mounting plate and the drill bit, so that the device can meet the punching requirements of different safety shoes and improve the universality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic cross-sectional view of the utility model;

[0027] Figure 2 This is a side view of the connection structure of the adjustment assembly and the drill bit of the present invention;

[0028] Figure 3 For the utility model Figure 1 Schematic diagram of the structure at point A in the middle.

[0029] Figure: 1, top plate; 2, vertical plate; 3, clamping assembly; 301, groove body; 302, protrusion; 4, mounting plate; 5, drill bit; 6, mounting seat; 7, clamping assembly; 701, movable block; 702, movable groove; 703, clamping seat; 704, frame; 705, first electric push rod; 8, pressing assembly; 801, slider; 802, pressing plate; 803, slide rail; 804, screw; 805, turntable; 9, adjustment assembly; 90 1. U-shaped seat; 902. Bidirectional lead screw; 903. Servo motor; 904. Nut; 905. Limit block; 906. Limit slot; 907. Connecting plate; 10. Second electric push rod; 11. Guide assembly; 1101. Guide hole; 1102. Guide rod; 12. Locking assembly; 1201. Slot; 1202. Insert rod; 1203. Movable plate; 1204. Positioning spring; 1205. Support plate; 1206. T-bar. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 The utility model is described in further detail.

[0031] Please refer to the attached figure in the instruction manual Figure 1 The present invention provides an embodiment of a shoelace hole punching device for wear-resistant safety shoes, comprising a mounting base 6, with vertical plates 2 vertically connected to both ends of the top of the mounting base 6. A top plate 1 is horizontally mounted on the tops of the two sets of vertical plates 2. A second electric push rod 10 is mounted on the bottom of the top plate 1. An adjustment assembly 9 is provided at the output end of the second electric push rod 10. A guide assembly 11 is provided between the adjustment assembly 9 and the top plate 1. The guide assembly 11 includes two sets of guide rods 1102, which are respectively vertically mounted on both ends of the top of the adjustment assembly 9. The tops of the two sets of guide rods 1102 extend out of the top plate 1, and the surface of the top plate 1 is provided with guide holes 1101 that match the guide rods 1102. When the adjustment assembly 9 moves up and down, it can drive the guide rods 1102 to slide in the guide holes 1101, thereby supporting the adjustment assembly 9 and making the adjustment assembly 9 more stable when raised or lowered.

[0032] Please refer to the attached figure in the instruction manual Figure 1 and Figure 2, the front and rear ends of the bottom of the adjusting component 9 are provided with a clamping component 3, the right side of the two groups of clamping components 3 are provided with a locking component 12, the bottom of the two groups of clamping components 3 are installed with a mounting plate 4, and the bottom of the two groups of mounting plates 4 are fixedly connected to several drill bits 5. The adjusting component 9 includes a U-shaped seat 901, which is installed at the output end of the second electric push rod 10. A bidirectional screw rod 902 is rotatably connected between the U-shaped seats 901 through a bearing, and a servo motor 903 for driving the bidirectional screw rod 902 to rotate is installed on the outside of the U-shaped seat 901. Both ends of the outer wall of the bidirectional screw rod 902 are screwed with a screw nut 904, and the top of the two groups of screw nuts 904 are fixedly connected to the limit block 905. Both ends of the inner top wall of the U-shaped seat 901 are provided with a limit groove 906 that slides with the limit block 905, and the bottom of the two groups of screw nuts 904 are fixedly connected with a connecting plate 907. When the servo motor 903 is started, it drives the bidirectional screw rod 902 to rotate. Under the sliding cooperation of the limit block 905 and the limit groove 906, the bidirectional screw rod 902 rotates to drive the two sets of nuts 904 to move left and right. The movement of the nut 904 drives the lower mounting plate 4 and the drill bit 5 to move left and right through the connecting plate 907, thereby adjusting the distance between the two sets of mounting plates 4, making it convenient to adjust several drill bits 5 to the position that needs to be opened on the shoe upper.

[0033] Please refer to the attached figure in the instruction manual Figure 1 and Figure 3 The clamping assembly 3 includes two sets of groove bodies 301, which are fixedly mounted on the bottom of the two sets of connecting plates 907. The tops of the two sets of mounting plates 4 are connected with protrusions 302 that plug into the groove bodies 301. The plug-in fit between the groove bodies 301 and the protrusions 302 facilitates the assembly and disassembly of the mounting plates 4.

[0034] Please refer to the attached figure in the instruction manual Figure 1 and Figure 3 The locking assembly 12 includes two groups of support plates 1205, which are respectively installed on the right sides of the two groups of groove bodies 301. A T-shaped rod 1206 is slidably passed through the middle of the two groups of support plates 1205. The two groups of T-shaped rods 1206 are fixedly installed with a movable plate 1203 on one end close to the protrusion 302. The outer walls of the two groups of T-shaped rods 1206 are sleeved with positioning springs 1204, and the positioning springs 1204 are located between the movable plate 1203 and the support plate 1205. The ends of the two groups of movable plates 1203 facing away from the T-shaped rod 1206 are connected to the insertion rod 1202, and the right sides of the two groups of protrusions 302 are provided with a slot 1201 for plugging with the insertion rod 1202. When it is necessary to release the fixing effect of the insertion rod 1202 on the protrusion 302, pull the T-shaped rod 1206 to the right, the T-shaped rod 1206 drives the movable plate 1203 to move to the right and compresses the positioning spring 1204. The movable plate 1203 moves to the right and drives the insertion rod 1202 to move to the right until the insertion rod 1202 is separated from the slot 1201.

[0035] Please refer to the attached figure in the instruction manual Figure 1 A clamping assembly 7 is provided on both sides of the mounting base 6. The clamping assembly 7 includes two sets of frames 704, which are respectively mounted on both sides of the mounting base 6. A first electric push rod 705 is installed inside each set of frames 704. The output ends of the two sets of first electric push rods 705 are mounted on the clamping base 703. The bottoms of the two sets of clamping bases 703 are fixedly connected to movable blocks 701. Both ends of the inner bottom wall of the mounting base 6 are provided with movable grooves 702 that slide with the movable blocks 701. The tops of the two sets of clamping bases 703 are provided with a clamping assembly 8. The frames 704 extend and retract to drive the clamping base 703 to move left and right. When the clamping base 703 moves, it drives the movable block 701 to slide within the movable groove 702, making the clamping base 703 more stable during movement. In addition, the spacing between the two sets of clamping bases 703 can be adjusted, so that the device can fix shoe uppers of different specifications.

[0036] Please refer to the attached figure in the instruction manual Figure 1 The clamping assembly 8 includes two sets of screws 804, which are respectively screwed to the tops of the two sets of clamping seats 703. A turntable 805 is fixedly installed on the top of each set of screws 804, which is convenient for the staff to hold and rotate the turntable 805. The bottoms of the two sets of screws 804 are rotatably connected to the pressure plate 802 through bearings. The sides of the two sets of pressure plates 802 away from the center of the mounting seat 6 are fixedly connected to the slider 801. The inner sides of the two sets of clamping seats 703 are provided with a slide rail 803 that slidably cooperates with the slider 801. When the staff rotates the turntable 805, the rotation of the turntable 805 drives the screws 804 to rotate. Under the sliding cooperation between the slider 801 and the slide rail 803, the screws 804 rotate to drive the pressure plate 802 to move downward until the pressure plate 802 presses and fixes the two ends of the shoe upper, thereby minimizing the displacement of the shoe upper during punching.

[0037] Working principle: When in use, the first electric push rod 705 is controlled to extend and retract according to the length specification of the shoe upper. The extension and retraction of the first electric push rod 705 drives the holder 703 to move left and right, so that the distance between the two groups of holders 703 can be adjusted. When the holder 703 is adjusted to the required distance, the shoe upper is placed between the two groups of holders 703. Then the staff rotates the turntable 805, and the rotation of the turntable 805 drives the screw 804 to rotate. Under the sliding cooperation of the slider 801 and the slide rail 803, the screw 804 rotates to drive the pressure plate 802 to move downward until the two groups of pressure plates 802 press the two ends of the shoe upper, which is convenient for fixing the shoe upper and trying to avoid displacement of the shoe upper during punching.

[0038] Then, the servo motor 903 is started. When the servo motor 903 works, it drives the bidirectional screw rod 902 to rotate. The bidirectional screw rod 902 rotates to drive the two sets of screw nuts 904 to move left and right. When the screw nut 904 moves, it drives the limit block 905 to slide in the limit slot 906, so that the screw nut 904 can be limited. The screw nut 904 moves through the connecting plate 907 to drive the clamping assembly 3 to move left and right, thereby adjusting the distance between the two sets of mounting plates 4 until several drill bits 5 are adjusted to the position where holes need to be punched above the shoe upper. At this time, the second electric push rod 10 is controlled to extend, and the second electric push rod 10 extends to drive the U-shaped seat 901 to move downward, thereby driving the mounting plate 4 and the drill bit 5 to move downward to punch holes in the shoe upper, so that the device can punch multiple shoelace holes at the same time, thereby improving the punching efficiency of the device.

[0039] When it is necessary to punch other numbers of shoelace holes on the shoe upper, first pull the T-bar 1206 to the right. The T-bar 1206 drives the movable plate 1203 to move to the right to compress the positioning spring 1204. The movable plate 1203 moves to the right, driving the insertion rod 1202 to move to the right until the insertion rod 1202 is separated from the slot 1201, releasing the fixing effect of the insertion rod 1202 on the protrusion 302. Then pull the mounting plate 4 downward. The mounting plate 4 drives the protrusion 302 to move downward, so that the protrusion 302 is separated from the groove body 301, so that the mounting plate 4 and the drill bit 5 can be disassembled and replaced, so that the device can meet the needs of punching shoelace holes for different safety shoes, thereby improving the universality of the device.

[0040] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shoelace hole punching device for wear-resistant safety shoes, comprising a mounting seat (6), characterized in that: Both ends of the top of the mounting seat (6) are connected to vertical plates (2), the tops of the two groups of vertical plates (2) are installed with top plates (1), the bottom of the top plate (1) is installed with a second electric push rod (10), the output end of the second electric push rod (10) is provided with an adjustment component (9), the front and rear ends of the bottom of the adjustment component (9) are provided with a clamping component (3), the right sides of the two groups of the clamping components (3) are provided with a locking component (12), the bottoms of the two groups of the clamping components (3) are installed with a mounting plate (4), the bottoms of the two groups of the mounting plates (4) are connected to a plurality of drill bits (5), and both sides of the mounting seat (6) are provided with a clamping component (7).

2. The shoelace hole punching device for wear-resistant safety shoes according to claim 1, characterized in that: A guide assembly (11) is provided between the adjustment assembly (9) and the top plate (1), and the guide assembly (11) comprises two groups of guide rods (1102). The two groups of guide rods (1102) are respectively mounted at two ends of the top of the adjustment assembly (9), and the tops of the two groups of guide rods (1102) extend out of the top plate (1). The surface of the top plate (1) is provided with guide holes (1101) that match the guide rods (1102).

3. The shoelace hole punching device for wear-resistant safety shoes according to claim 1, characterized in that: The adjustment assembly (9) includes a U-shaped seat (901), the U-shaped seat (901) is installed at the output end of the second electric push rod (10), a bidirectional screw rod (902) is connected between the U-shaped seat (901) through a bearing, a servo motor (903) for driving the bidirectional screw rod (902) to rotate is installed on the outer side of the U-shaped seat (901), both ends of the outer wall of the bidirectional screw rod (902) are screwed with a nut (904), the tops of the two groups of the nut (904) are connected to a limit block (905), both ends of the inner top wall of the U-shaped seat (901) are provided with a limit groove (906) that is slidably matched with the limit block (905), and the bottoms of the two groups of the nut (904) are connected to a connecting plate (907).

4. The shoelace hole punching device for wear-resistant safety shoes according to claim 3, characterized in that: The snap-fit ​​assembly (3) comprises two groups of groove bodies (301), the two groups of groove bodies (301) being respectively mounted on the bottoms of two groups of connecting plates (907), and the tops of the two groups of mounting plates (4) are both connected with protrusions (302) that are plugged into and engaged with the groove bodies (301).

5. The shoelace hole punching device for wear-resistant safety shoes according to claim 4, characterized in that: The locking assembly (12) comprises two groups of support plates (1205), the two groups of support plates (1205) being respectively mounted on the right sides of the two groups of groove bodies (301), the middle mounting plates (1203) of the two groups of support plates (1205) being provided with a T-shaped rod (1206), the ends of the two groups of T-shaped rods (1206) close to the protrusions (302) being provided with a movable plate (1203), the outer walls of the two groups of T-shaped rods (1206) being provided with a positioning spring (1204), and the positioning spring (1204) being located between the movable plate (1203) and the support plate (1205), the ends of the two groups of movable plates (1203) facing away from the T-shaped rod (1206) being connected with an insertion rod (1202), and the right sides of the two groups of protrusions (302) being provided with a slot (1201) for plugging with the insertion rod (1202).

6. The shoelace hole punching device for wear-resistant safety shoes according to claim 1, characterized in that: The clamping assembly (7) includes two groups of frames (704), the two groups of frames (704) are respectively installed on both sides of the mounting seat (6), the interiors of the two groups of frames (704) are both installed with first electric push rods (705), the output ends of the two groups of first electric push rods (705) are both installed with clamping seats (703), the bottoms of the two groups of clamping seats (703) are both connected to movable blocks (701), and both ends of the inner bottom wall of the mounting seat (6) are provided with movable grooves (702) that slide with the movable blocks (701); A pressing assembly (8) is provided on the top of both groups of the card holders (703).

7. The shoelace hole punching device for wear-resistant safety shoes according to claim 6, characterized in that: The clamping assembly (8) includes two groups of screw rods (804), the two groups of screw rods (804) are respectively screwed on the tops of the two groups of clamping seats (703), the tops of the two groups of screw rods (804) are both installed with turntables (805), the bottoms of the two groups of screw rods (804) are both connected to pressure plates (802) through bearings, the sides of the two groups of pressure plates (802) away from the center of the mounting seat (6) are both connected to sliders (801), and the inner sides of the two groups of clamping seats (703) are provided with slide rails (803) that slide with the sliders (801).

Citation Information

Patent Citations

  • Perforating device for shoelace hole processing

    CN215603580U