CN211684232U - Linkage device in thread binding machine - Google Patents

Abstract

The utility model provides a linkage among line type book-binding machine belongs to binding equipment technical field. It has solved the problem that current line formula book-binding machine structure is complicated, with high costs and the fault rate is high. The linkage device comprises a rotating shaft transversely arranged in the upper shell, a first connecting rod assembly capable of driving the punching device to move up and down when the rotating shaft rotates, a first pull rod and a first electromagnet, wherein the lower end of the first connecting rod assembly is fixed with the asynchronous threading device, the first electromagnet is arranged above the pull rod, the first connecting rod assembly is arranged in the upper shell in the vertical direction, the second connecting rod assembly can drive the first electromagnet to move up and down when the rotating shaft rotates, a metal support in an inverted L shape is fixed at the upper end of the pull rod, a second electromagnet is fixed on the inner side of the upper shell, and the vertical part of the metal support is abutted. It has simple structure, with low costs and fault rate advantage such as low.

Description

Linkage device in thread binding machine

Technical Field

The utility model belongs to the technical field of the binding means, a line formula book-binding machine is related to, especially, relate to aggregate unit in the line formula book-binding machine.

Background

The management of paper materials such as archives, financial certificates, etc. is an essential task in each enterprise and public institution, and the binding of paper materials is a convenient way for arrangement and search. The binding form generally includes plastic thread, seam, iron nail or threading, wherein, the mode of piling up paper article data and regularly drilling and threading and binding is the most accord with the file administration standard, can durably preserve, and firm in connection, can adapt to the paper article file administration of various thickness and materials.

The binding machine is one of the most commonly used tools in offices and printing plants, and generally comprises a binding platform, a drilling mechanism and other parts, and sometimes a threading mechanism. When the binding platform is used, paper materials are orderly stacked on the binding platform, the drilling mechanism is pressed down, an electric drill in the drilling mechanism can drill holes at corresponding positions of the paper materials, and then the threading mechanism completes drilling of the drilling mechanism and lifts the drilling mechanism again to thread a plurality of holes in the paper materials. After threading is finished, the threading mechanism resets, then paper materials are taken down, and then the binding can be finished by binding the thread.

At present, in the existing thread binding machine, a threading mechanism and a drilling mechanism are controlled independently, so that the structure of the whole thread binding machine is complicated, the cost is also high due to a plurality of control mechanisms, and the defect of high failure rate is also accompanied.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a aggregate unit among line type book-binding machine, solved the technical problem that current line type book-binding machine structure is complicated, with high costs and easy trouble.

The purpose of the utility model can be realized by the following technical proposal:

linkage among line book-binding machine, line book-binding machine include casing down and be fixed in the last casing on the casing down, are equipped with perforating device in the last casing, the internal asynchronous threading device that is equipped with of inferior valve, linkage including transversely set up the pivot in the last casing and can drive the link assembly one that perforating device reciprocated when the pivot rotates, its characterized in that, linkage still include along vertical direction locate in the last casing and lower extreme and asynchronous threading device fixed pull rod mutually and locate the electro-magnet one above the pull rod, be equipped with between electro-magnet one and the pivot can drive the link assembly two that electro-magnet one reciprocated when the pivot rotates, the upper end of pull rod is fixed with the metal support that is inversion L type, the inboard of going up the casing is fixed with electro-magnet two, the vertical part and the electro-magnet two of metal support lean on and lean on.

The first electromagnet is electrified and is attracted with the horizontal part of the metal support together. And then, the rotating shaft is controlled to rotate reversely, the punching device moves upwards to reset, and simultaneously the electromagnet moves upwards to lift the asynchronous threading device through the pull rod so as to thread the punched paper. After threading is finished, controlling the first electromagnet to lose power, so that the first electromagnet is separated from the metal support. Meanwhile, the second electromagnet starts to receive pulse signals, and the vertical part of the metal support abuts against the second electromagnet, so that the metal support can slowly descend in a mode of being adsorbed, separated, re-adsorbed and re-separated with the second electromagnet to reset the asynchronous threading device, the phenomenon that the asynchronous threading device directly falls down under the action of gravity is avoided, impact is reduced, other related parts in the asynchronous threading device and the thread binding machine are prevented from being damaged, and the failure rate is reduced. In addition, through the cooperation of the rotating shaft, the first connecting rod assembly and the second connecting rod assembly, the synchronous driving of the punching device and the asynchronous threading device by the rotation of one rotating shaft is realized, and the actions of the punching device and the asynchronous threading device are not interfered with each other, so that the structure is simplified well, and the production cost is reduced.

In the linkage device in the thread binding machine, a first micro switch is fixed on the inner side of the upper shell, a trigger rod is fixed on the vertical part of the metal bracket, and when the metal bracket moves upwards, the trigger rod can trigger the first micro switch to enable the first electromagnet to lose power and the second electromagnet to receive pulse signals.

In the linkage device in the thread binding machine, a guide rod penetrates through the pull rod, the upper end of the guide rod extends out of the pull rod, the first electromagnet is fixed on the guide rod, the second connecting rod assembly comprises a second connecting rod and a connecting frame, the lower end of the second connecting rod is fixed on the rotating shaft, the connecting frame is fixed at the upper end of the guide rod, a strip-shaped chute is arranged on the connecting frame, and a sliding pin penetrating through the strip-shaped chute is fixed at the upper end of the second connecting rod.

The rotating shaft drives the second connecting rod to swing around the axis of the rotating shaft, the rotating shaft slides along the strip-shaped sliding groove through the sliding pin to apply downward pressure to the connecting frame, so that the guide rod drives the first electromagnet to move downwards, and the first electromagnet can suck the horizontal part of the metal support, so that the thread binding machine can drive the asynchronous threading device and the punching device to work simultaneously.

In the linkage device in the thread binding machine, the punching device comprises a sliding support arranged in the upper shell in a sliding mode and a plurality of electric drills fixed on the sliding support, two protruding pieces are fixed to the upper end of the sliding support, a supporting shaft is arranged between the two protruding pieces, a first connecting rod assembly comprises two lower ends, the two lower ends of the first connecting rod assembly are fixed on the rotating shaft, the two lower ends of the first connecting rod assembly are respectively sleeved on swing arms at two ends of the supporting shaft, and the upper ends of the two swing arms are respectively hinged to the upper ends of.

The first connecting rod can be driven to swing around the axis of the rotating shaft during the rotating shaft, and the first connecting rod exerts downward acting force on the sliding support through the hinging with the swing arm, so that the sliding support drives the electric drill to synchronously move downwards to complete the punching work.

In the linkage device in the thread binding machine, the inner side of the upper shell is fixed with two first sliding rails which are arranged in parallel, the two first sliding rails are connected with a paper pressing box in a sliding way, the upper surface of the lower shell is provided with a binding plane, the upper shell is provided with an opening towards the binding plane, the lower end of the paper pressing box is positioned at the opening and is higher than the binding plane, the inner side of the paper pressing box is fixed with two second sliding rails which are arranged in parallel, a sliding support is connected on the two second sliding rails in a sliding way, the bottom of the paper pressing box is provided with a through hole for a drill bit of an electric drill to pass through in a penetrating way, the inner bottom wall of the paper pressing box is fixedly connected with a support column, a guide column is sleeved outside the support column, the sliding support is sleeved at the upper end of the guide column, an upper plug for preventing the sliding support from being separated from the guide column is fixed at the upper end, the support column penetrates through the lower plug, a limiting nut is fixed at the upper end of the support column, a second spring with two ends respectively acting on the lower plug and the limiting nut is sleeved outside the support column, and the paper pressing box always has the trend of moving upwards under the elastic action of the second spring.

When the electric drill does not work, the sliding support enables the electric drill to be kept at a higher position under the action of the first spring, and the paper pressing box is upwards pushed under the action of the elastic force of the second spring, so that the top wall of the inner side of the paper pressing box is abutted against the lower plug. When the rotating shaft is controlled to rotate to enable the sliding support to move downwards for punching, the sliding support pushes the paper pressing box to move downwards together under the action of the first spring, so that the paper pressing box is pressed on paper, then the sliding support continues to move downwards in a state of compressing the first spring, and drill bits of the electric drills extend out of through holes in the paper pressing box to punch holes in the paper. After punching is finished, the rotating shaft is controlled to rotate reversely, so that the sliding support is not stressed downwards, the sliding support is reset under the elastic force of the first spring, and finally the paper pressing box is reset under the elastic force of the second spring.

In the linkage device in the thread binding machine, the inner side of the upper shell is fixed with the rectangular and vertically arranged positioning plate, the back surface of the paper pressing box is fixed with the third electromagnet, the third electromagnet abuts against the positioning plate, and when the paper pressing box slides downwards to the lowest position, the third electromagnet can be electrified and adsorbed on the positioning plate.

When the threading device works, the threading is carried out after punching, namely, the punching device moves downwards to punch holes on the paper, then the punching device moves upwards, and meanwhile, the asynchronous threading device is lifted upwards to thread the thread through the punched holes on the paper. Therefore, the positioning plate is fixed on the inner side of the upper shell, the electromagnet III is fixed on the back surface of the paper pressing box, the electromagnet III is controlled to be electrically adsorbed on the positioning plate after the paper pressing box slides downwards to the lowest position to press the paper, and the purpose is that when the punching device resets upwards to enable the asynchronous threading device to thread, the paper pressing box can still keep the state of pressing the paper so as to ensure that the paper cannot fall off during threading.

In the linkage device in the thread binding machine, the inner side of the upper shell is also fixed with a second micro switch which can control the third electromagnet to lose power when being triggered, the second micro switch is positioned above the first micro switch, the guide rod is fixed with a triggering piece, and the triggering piece is convexly provided with a triggering arm which can trigger the second micro switch when the guide rod moves upwards.

When the micro switch is triggered, the electromagnet loses power to enable the asynchronous threading device to fall back, threading work is completed at the moment, and the paper pressing box is still pressed on paper due to the fact that the electromagnet is adsorbed on the positioning plate. Therefore, a second microswitch is arranged above the first microswitch, and when the guide rod continues to move upwards, the second microswitch is triggered by the trigger arm to control the third electromagnet to lose power, so that the third electromagnet is separated from the positioning plate, the paper pressing box can reset under the elastic force of the second spring, and paper can be taken down.

Compared with the prior art, the linkage device in the thread binding machine realizes the synchronous driving of the punching device and the asynchronous threading device by the rotation of one rotating shaft through the matching of the rotating shaft, the first connecting rod assembly and the second connecting rod assembly, and the actions of the punching device and the asynchronous threading device can not interfere with each other, thereby simplifying the structure and reducing the production cost well.

In addition, the electromagnet II is used for receiving pulse signals to realize the gentle descending of the asynchronous threading device, the phenomenon that the asynchronous threading device directly falls down under the action of gravity is avoided, the impact is reduced, other related parts in the asynchronous threading device and the thread binding machine are prevented from being damaged, and the failure rate is reduced.

Drawings

Fig. 1 is a schematic view of a linkage in the present wire stitcher.

Fig. 2 is a longitudinal sectional view of the linkage device of the present thread binding machine between the punching device and the platen.

Fig. 3 is a schematic view of the linkage device in the present wire binding machine when the punching device is reset and the paper pressing cassette is held to press the paper.

Fig. 4 is a longitudinal sectional view between the upper case and the platen when the platen is held pressing the paper.

Fig. 5 is a schematic view showing the connection between the rotary shaft and the asynchronous threading device in the linkage device of the present thread binding machine.

Fig. 6 is a schematic view of another angular connection between the shaft and the asynchronous threading device in the linkage of the present thread binding machine.

In the figure, 1, an upper shell; 2. a punching device; 2a, a sliding bracket; 2b, electric drilling; 3. an asynchronous threading device; 4. a rotating shaft; 5. a first connecting rod component; 5a, a first connecting rod; 5b, swinging arms; 6. a pull rod; 7. an electromagnet I; 8. a connecting rod component II; 8a, a second connecting rod; 8b, a connecting frame; 8c, a sliding pin; 9. a metal bracket; 10. an electromagnet II; 11. a first microswitch; 12. a trigger lever; 13. a guide bar; 14. a tab; 15. a support shaft; 16. pressing the paper box; 17. a support pillar; 18. a guide post; 19. an upper plug; 20. a lower plug; 21. a first spring; 22. a limit nut; 23. a second spring; 24. positioning a plate; 25. an electromagnet III; 26. a second microswitch; 27. a trigger piece; 27a, a trigger arm; 28. an operating handle; 29. binding a plane; 30. mounting a plate; 31. a first slide rail; 32. and a second sliding rail.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 3, a linkage device in a thread binding machine, the thread binding machine includes a lower casing and an upper casing 1 fixed on the lower casing, a punching device 2 is arranged in the upper casing 1, the linkage device includes a rotating shaft 4 transversely arranged in the upper casing 1 and a connecting rod assembly 5 capable of driving the punching device 2 to move up and down when the rotating shaft 4 rotates. The upper surface of the upper case 1 has a binding plane 29, and the upper case 1 where the punching unit 2 is located above the binding plane 29. One end of the rotating shaft 4 extends out of one side of the upper shell 1 and is vertically and fixedly connected with an operating handle 28.

As shown in fig. 1, 2 and 3, the upper housing 1 has an opening facing the binding plane 29, the opening of the upper housing 1 is provided with a paper pressing box 16, the lower end of the paper pressing box 16 is higher than the binding plane 29, two parallel sliding rails 31 are fixed on the inner wall of the upper housing 1 at the opening, and the paper pressing box 16 is slidably connected to the two sliding rails 31. The upper side opening of paper pressing box 16, the opening part inner wall of paper pressing box 16 is fixed with two parallel arrangement's slide rail two 32, perforating device 2 includes sliding support 2a and a plurality of electric drill 2b that are fixed in on sliding support 2a of sliding connection on two slide rails two 32, and the bottom of paper pressing box 16 runs through the through-hole that is provided with the drill bit of a plurality of confession electric drills 2b and passes, and binding plane 29 department runs through and is provided with a plurality of dodging holes with the same central line setting of through-hole.

As shown in fig. 2, 3 and 4, two protruding pieces 14 are fixed at the upper end of the sliding support 2a, a supporting shaft 15 is arranged between the two protruding pieces 14, the first connecting rod assembly 5 comprises two first connecting rods 5a of which the lower ends are fixed on the rotating shaft 4 and two swing arms 5b of which the lower ends are respectively sleeved at the two ends of the supporting shaft 15, and the upper ends of the two swing arms 5b are respectively hinged with the upper ends of the two first connecting rods 5 a. The inner side bottom wall of the paper pressing box 16 is fixedly connected with a support column 17, a guide column 18 is sleeved outside the support column 17, the sliding support 2a is sleeved at the upper end of the guide column 18, an upper plug 19 for preventing the sliding support 2a from being separated from the guide column 18 is fixed at the upper end of the guide column 18, a lower plug 20 is fixed at the lower end of the guide column 18, and a first spring 21 with two ends respectively acting on the inner side wall of the upper end of the sliding support 2a and the lower plug 20 is sleeved outside the guide column 18. The support column 17 penetrates through the lower plug 20, the limit nut 22 is fixed at the upper end of the support column 17, a second spring 23 is sleeved outside the support column 17, two ends of the second spring 23 respectively act on the lower plug 20 and the limit nut 22, and the paper pressing box 16 always has the tendency of moving upwards under the elastic force of the second spring 23. A rectangular and vertically arranged positioning plate 24 is fixed on the inner side of the upper shell 1, a third electromagnet 25 is fixed on the back surface of the paper pressing box 16, the third electromagnet 25 abuts against the positioning plate 24, and when the paper pressing box 16 slides downwards to the lowest position, the third electromagnet 25 can be electrified and adsorbed on the positioning plate 24. Wherein, a third microswitch is fixed on the sliding bracket 2a, and the upper plug 19 is pressed on the third microswitch to make the microswitch in a normally closed state to control the drill bit of the electric drill 2b not to rotate. When the sliding support 2a moves downwards, the microswitch III moves downwards synchronously with the sliding support 2a, and when the paper pressing box 16 presses the paper surface, the upper plug 19 is kept still, so that the microswitch III is released, and the drill bit of the electric drill 2b is controlled to rotate.

As shown in fig. 1, 5 and 6, an asynchronous threading device 3 is disposed in the lower housing, wherein the asynchronous threading device 3 may refer to an asynchronous threading mechanism of a bookbinding machine of application No. 201820926218.3 that has been proposed by the applicant, the linkage device further includes a pull rod 6 disposed in the upper housing 1 along the vertical direction and an electromagnet 7 disposed above the pull rod 6, the lower end of the pull rod 6 extends into the lower housing and is fixed with the asynchronous threading device 3, and a link assembly two 8 is disposed between the electromagnet 7 and the rotating shaft 4 and can drive the electromagnet 7 to move up and down when the rotating shaft 4 rotates. An inverted L-shaped metal bracket 9 is fixed at the upper end part of the pull rod 6, a second electromagnet 10 is fixed at the inner side of the upper shell 1, and the vertical part of the metal bracket 9 is abutted against the second electromagnet 10.

As shown in fig. 5 and 6, a first microswitch 11 is fixed on the inner side of the upper shell 1, a trigger rod 12 is fixed on the vertical portion of the metal bracket 9, the trigger rod 12 may be a screw, and when the metal bracket 9 moves upward, the trigger rod 12 can trigger the first microswitch 11 to power off the first electromagnet 7 and the second electromagnet 10 to receive a pulse signal. Furthermore, a guide rod 13 penetrates through the pull rod 6, the upper end of the guide rod 13 extends out of the pull rod 6, the first electromagnet 7 is fixed on the guide rod 13, the second connecting rod assembly 8 comprises a second connecting rod 8a and a connecting frame 8b, the lower end of the second connecting rod 8a is fixed on the rotating shaft 4, the connecting frame 8b is fixed at the upper end of the guide rod 13, a strip-shaped sliding groove is formed in the connecting frame 8b, and a sliding pin 8c penetrating through the strip-shaped sliding groove is fixed at the upper end of the second.

As shown in fig. 5 and 6, a second micro switch 26 capable of controlling the third electromagnet 25 to lose power when triggered is further fixed on the inner side of the upper housing 1, the second micro switch 26 is located above the first micro switch 11, a trigger piece 27 is fixed on the guide rod 13, and a trigger arm 27a capable of triggering the second micro switch 26 when the guide rod 13 moves upwards is convexly arranged on the trigger piece 27. Wherein, the inner side of the upper shell 1 is fixed with a mounting plate 30, and the first microswitch 11, the second microswitch 26 and the second electromagnet 10 are all fixed on the mounting plate 30.

In stapling, the sheets are placed on the stapling plane 29, and then the operating handle 28 is pulled to swing downward to rotate the rotary shaft 4. The rotating shaft 4 drives the two first connecting rods 5a to swing downwards, and the first connecting rods 5a apply downward acting force to the sliding support 2a through the hinge joint with the swing arms 5b, so that the sliding support 2a drives the electric drills 2b to move downwards. The sliding bracket 2a is firstly pushed against the paper pressing box 16 by the action of the first spring 21 to move downwards together, so that the paper pressing box 16 presses the paper, and then the sliding bracket 2a continues to move downwards in a state of compressing the first spring 21, so that the drill bits of the electric drills 2b extend out of the through holes on the paper pressing box 16 to punch holes on the paper.

When the rotating shaft 4 drives the first connecting rod 5a to swing, the second connecting rod 8a also swings together, the rotating shaft 4 applies downward pressure to the connecting frame 8b through the sliding of the sliding pin 8c along the strip-shaped sliding groove, namely, when the sliding support 2a moves downwards, the guide rod 13 also moves downwards along with the first electromagnet 7, and the first electromagnet 7 is electrified and adsorbed on the horizontal part of the metal support 9 fixed at the upper end part of the pull rod 6.

After threading is finished, the operating handle 28 is pulled reversely, the rotating shaft 4 is rotated reversely, the sliding support 2a is reset under the action of the first spring 21, and meanwhile, the electromagnet three 25 fixed on the back surface of the paper pressing box 16 is electrified to suck the positioning plate 24, so that the paper pressing box 16 is kept in a state of pressing paper. The rotation of the shaft 4 causes the electromagnet to move upwards together with the metal bracket 9, so that the asynchronous threading device 3 is lifted upwards and the thread can pass through the hole drilled by the drill bit on the paper. When the metal bracket 9 moves up to the trigger rod 12 to trigger the first microswitch 11, the first electromagnet 7 is de-energized, so that the metal bracket 9 is separated from the first electromagnet 7. Meanwhile, the second electromagnet 10 starts to receive pulse signals, and the vertical part of the metal support 9 abuts against the second electromagnet 10, so that the metal support 9 can slowly descend in a mode of being adsorbed, separated, re-adsorbed and re-separated with the second electromagnet 10 to reset the asynchronous threading device 3, the phenomenon that the asynchronous threading device 3 directly falls down under the action of gravity is avoided, impact is reduced, other related parts in the asynchronous threading device 3 and the thread binding machine are prevented from being damaged, and the failure rate is reduced.

After the electromagnet I7 is separated from the metal bracket 9, the guide rod 13 continues to move upwards. When the guide rod 13 moves up to the trigger arm 27a to trigger the second microswitch 26, the second microswitch 26 controls the third electromagnet 25 to lose power, so that the paper pressing box 16 is separated from the positioning plate 24, and the paper pressing box 16 is reset to the initial state under the action of the elastic force of the second spring 23, so that the paper which is threaded is not pressed any more and can be taken away.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. Linkage device in the thread binding machine, the thread binding machine includes the lower casing and the upper casing (1) fixed on the lower casing, the upper casing (1) is equipped with the perforating device (2), the lower casing is equipped with the asynchronous threading device (3), the linkage device include transversely set up in the upper casing (1) the pivot (4) and can drive the link assembly one (5) that the perforating device (2) reciprocated when the pivot (4) rotates, its characteristic is, the linkage device also include along vertical direction locate in the upper casing (1) and the lower extreme with asynchronous threading device (3) fixed pull rod (6) and locate the pull rod (6) above the electromagnet one (7), can drive the electromagnet one (7) to reciprocate when the pivot (4) rotates between the electromagnet one (7) and the pivot (4) link assembly two (8), an inverted L-shaped metal bracket (9) is fixed at the upper end part of the pull rod (6), a second electromagnet (10) is fixed on the inner side of the upper shell (1), and the vertical part of the metal bracket (9) is abutted against the second electromagnet (10).

2. The linkage device in the thread binding machine according to claim 1, wherein a first micro switch (11) is fixed on the inner side of the upper shell (1), a trigger rod (12) is fixed on the vertical part of the metal bracket (9), and when the metal bracket (9) moves upwards, the trigger rod (12) can trigger the first micro switch (11) to power off the first electromagnet (7) and the second electromagnet (10) to receive a pulse signal.

3. The linkage device in the thread binding machine according to claim 2, wherein a guide rod (13) is arranged in the pull rod (6) in a penetrating manner, the upper end of the guide rod (13) extends out of the pull rod (6), the electromagnet I (7) is fixed on the guide rod (13), the connecting rod assembly II (8) comprises a connecting rod II (8a) and a connecting frame (8b), the lower end of the connecting rod II is fixed on the rotating shaft (4), the connecting frame (8b) is provided with a strip-shaped sliding groove, and the upper end of the connecting rod II (8a) is fixed with a sliding pin (8c) penetrating through the strip-shaped sliding groove.

4. The linkage device in the thread binding machine according to claim 3, wherein the punching device (2) comprises a sliding support (2a) slidably disposed in the upper housing (1) and a plurality of electric drills (2b) fixed on the sliding support (2a), two protruding pieces (14) are fixed on the upper end of the sliding support (2a), a supporting shaft (15) is disposed between the two protruding pieces (14), the first connecting rod assembly (5) comprises a first connecting rod (5a) with two lower ends fixed on the rotating shaft (4) and swing arms (5b) with two lower ends respectively sleeved on two ends of the supporting shaft (15), and the upper ends of the two swing arms (5b) are respectively hinged with the upper ends of the first connecting rod (5 a).

5. The linkage device in the thread binding machine according to claim 4, wherein two parallel slide rails (31) are fixed on the inner side of the upper housing (1), a paper pressing box (16) is slidably connected on the two slide rails (31), the upper surface of the lower housing is provided with a binding plane (29), the upper housing (1) is provided with an opening facing the binding plane (29), the lower end of the paper pressing box (16) is positioned at the opening and is higher than the binding plane (29), two parallel slide rails (32) are fixed on the inner side of the paper pressing box (16), a sliding support (2a) is slidably connected on the two slide rails (32), a through hole for a drill bit of the electric drill (2b) to pass through is arranged at the bottom of the paper pressing box (16), a support column (17) is fixedly connected to the inner bottom wall of the paper pressing box (16), a guide column (18) is sleeved outside the support column (17), the sliding support (2a) is sleeved at the upper end of the guide column (18), and the upper end of the guide column (18) is The upper plug (19) is disengaged from the guide column (18) through the sliding support (2a), the lower end of the guide column (18) is fixed with the lower plug (20), a first spring (21) with two ends respectively acting on the inner side wall of the upper end of the sliding support (2a) and the lower plug (20) is sleeved outside the guide column (18), the support column (17) penetrates through the lower plug (20), a limiting nut (22) is fixed at the upper end of the support column (17), a second spring (23) with two ends respectively acting on the lower plug (20) and the limiting nut (22) is sleeved outside the support column (17), and the paper pressing box (16) always has the upward movement trend under the elastic force action of the second spring (23).

6. The linkage device in the thread binding machine according to claim 5, characterized in that a rectangular and vertically arranged positioning plate (24) is fixed on the inner side of the upper shell (1), a third electromagnet (25) is fixed on the back surface of the paper pressing box (16), the third electromagnet (25) is abutted against the positioning plate (24), and when the paper pressing box (16) slides downwards to the lowest position, the third electromagnet (25) can be electrified and adsorbed on the positioning plate (24).

7. The linkage device in the thread binding machine according to claim 6, characterized in that a second micro switch (26) which can control the electromagnet three (25) to lose power when being triggered is further fixed on the inner side of the upper shell (1), the second micro switch (26) is positioned above the first micro switch (11), a trigger piece (27) is fixed on the guide rod (13), and a trigger arm (27a) which can trigger the second micro switch (26) when the guide rod (13) moves upwards is convexly arranged on the trigger piece (27).

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