CN111993808A - An electric three-hole punching, threading and binding machine - Google Patents

Abstract

The invention discloses an electric three-hole punching, threading and binding integrated machine, which relates to the technical fields of paper processing and punching machines. Mechanism and threading mechanism, the threading mechanism is synchronously equipped with a punching pad that can move in parallel, and both ends of the punching pad are fixed on the frame by a linear sliding mechanism; the punching mechanism includes a punching carrier plate and a push punching plate. The punching pusher moves up and down on the punching carrier. There are three punching motors at equal intervals on the punching carrier; the threading mechanism includes the threading carrier and the threading pusher that pushes the threading carrier to move up and down. Threading needles are arranged coaxially at the positions of each hollow drilling tool; a tray is arranged on the frame and above the punching pad. The invention can complete punching, threading and binding at one go, effectively avoid the displacement of paper holes, reduce the difficulty of punching, threading and binding, and greatly improve work efficiency.

Description

An electric three-hole punching, threading and binding machine

technical field

The invention relates to the technical fields of paper processing, filing of archives and documents, conjoined binding of skin rolls and files, and punching machines, in particular to an electric three-hole punching, threading and binding integrated machine.

Background technique

Documents and archives need to be bound and sealed after completion. During the binding process, the paper needs to be punched with a punching machine, and then bound by threading. The thickness of the paper is generally dozens or even hundreds of pages. During the process, the paper needs to be kept flat, the punching holes should be smooth, and there should be no wrinkles. The existing punching machine has a single structure, and the depth of the punching margins is limited. The conjoined binding of the dossier cannot complete the threading and binding, and the roll skin and the dossier need to be punched separately. If the hole is punched, remove the rolled leather file after punching and then thread it for binding. This will undoubtedly cause the movement of the paper, resulting in misplaced punching, affecting threading and binding, and also causing paper folds, affecting binding. At the same time, the work Inefficient and not aesthetically pleasing.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose an electric three-hole punching, threading and binding integrated machine in order to solve the disadvantages of single structure, high binding difficulty and low work efficiency in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions:

An electric three-hole punching, threading and binding machine is designed, which includes a frame, the inner two sides of the frame are vertically provided with a longitudinal axis, and the two ends of the longitudinal axis are fixed on the frame by a first fixing seat, The inside of the frame is coaxially provided with a punching mechanism and a threading mechanism for paper binding. The threading mechanism is provided with a punching pad that can move in parallel. The end is fixed on the frame by a linear sliding mechanism;

The punching mechanism includes a punching carrier plate and a punching push part that pushes the punching carrier plate to move up and down. The hole carrier plate is provided with 3 punching motors at equal intervals along its length, and the 3 punching motors are connected in parallel with travel switches to control the stroke power-on position of the punching motor. The output end of the punching motor is installed with a punching hollow Drill.

The vertical shafts arranged on both sides of the frame and the punching carrier plate form a door-shaped frame; the hollow door-shaped frame structure allows punching materials to pass through the fuselage, realizes arbitrary adjustment of the depth of the punching margins, and achieves various requirements. Binding method.

The threading mechanism includes a threading carrier plate and a threading pushing portion that pushes the threading carrier to move up and down. Threading needles are arranged coaxially at the positions of each hollow drilling tool, and the ends of the three threading needles are arranged on the same side with a thread groove;

A linkage mechanism for synchronous movement is arranged between the punching pad and the threading carrier plate. The fisheye rod end joint bearing is fixed on the threading carrier plate through the first fisheye bearing fixing seat, and the second fisheye rod end joint bearing at the other end is fixed on the punching pad through the second fisheye bearing fixing seat;

Said punching backing plate is located on one side of the longitudinal axis corresponding to the positions of the three punching hollow drills, and is provided with a gasket installation groove, and a gasket is placed in the gasket installation groove;

The frame is provided with a tray for placing paper on the top of the punching pad, the tray is formed by splicing a front supporting plate and a rear supporting plate, and the front supporting plate and the rear supporting plate are located on one side of the splicing There are long slits for the punching pad to move in parallel and the threading needle to pass through.

The lower base of the frame is provided with a power interface and a power switch for supplying power to the electric three-hole punching, threading and binding machine.

There is also a hood for covering the outer side of the upper part of the frame, and both sides of the bottom of the hood are provided with long strip-shaped paper feed openings.

Further, the linear sliding mechanism includes a slider, a horizontal shaft and a second fixing seat, the horizontal shaft is arranged in parallel below the punching pad, and both ends of the horizontal shaft are fixed on the second fixing seat through the second fixing seat. On the frame, the slider is fixed on the bottom of the punching pad, and is sleeved on the horizontal shaft in a sliding manner.

Further, the punching pushing part includes a punching handle, an upper pressing arm, an upper connecting rod and an upper connecting pin, two ends of the punching handle are fixedly installed with symmetrical upper pressing arms, and the upper connecting pin is fixed on the punching handle. The two ends of the hole carrier plate, the two sides of the frame are vertically provided with upper limit holes for the upper connecting pin to pass through, and one end of the upper connecting rod is installed on the upper connecting pin in a rotating manner, and the upper The other end of the connecting rod is connected to the upper pressing arm in a rotational manner through the upper movable pin, and the end of the upper pressing arm away from the punching handle is mounted on the frame through the upper fixing pin.

Further, the threading push part includes a threading handle, a lower pressing arm, a lower connecting rod, a lower movable pin, a lower fixing pin, and a lower connecting pin, the upper connecting pin is fixed on one end of the threading carrier plate, and the rack corresponds to One side of the threading push part is vertically provided with a lower limit hole for the lower connecting pin to pass through. In the threading handle, one end of the lower link is fixedly installed on one side of the lower limit hole through the lower fixing pin, and the other end of the lower link is rotatably installed on the lower pressing arm through the lower movable pin.

Further, a limit ring is fixed at the position of the punching pad on the longitudinal axis, and a return spring for supporting the punching plate to reset upward is arranged above the limit ring, and the return spring is sleeved on the longitudinal axis. .

Further, both ends of the punching carrier plate are also provided with punching limit screws for limiting the up and down displacement stroke of the punching carrier plate, and the top end of the punching limit screw is fixed on the first fixing seat, and the punching limit screw is fixed on the first fixing seat. The bottom end of the hole limit screw is provided with a limit block.

Further, a press board is provided above the front support plate, a screw rod is vertically provided at both ends of the front support board, the two ends of the press board are provided with installation holes passing through the screw rod, and the screw rod is located below the press board. There is a buffer spring, the screw rod is located above the pressing board and a locking nut is provided, and the pressing board is provided with an elongated through hole corresponding to the position of the punching hollow drill and the threading needle.

Further, a paper positioning device is provided on the rear support plate, and the paper positioning device includes a paper stop strip that can move forward and backward, and two ends of one side of the paper stop strip away from the front support plate are rotatably connected with adjusting screw rods, The adjusting screw rod is fixed on the edge of the rear support plate by the fixing plate, the adjusting screw rod is threadedly connected with a first internal thread adjusting handwheel, and the end away from the paper stop strip is screwed with a second internal thread adjusting handwheel. .

Further, the punching hollow drill is provided with a paper scrap device, one side of the paper scrap device is provided with a chip discharge reed pipe, and the other end of the chip discharge reed pipe is connected with a paper receiving box. Fixed on the lower part of the punched carrier plate.

The electric three-hole punching, threading and binding integrated machine proposed by the present invention has the beneficial effects of:

(1) The present invention performs punching and binding of paper through the binding method of upper punching and lower threading. During the whole binding process, the paper does not need to be moved, and the binding is completed at one go, effectively avoiding the displacement of paper holes and reducing the cost of punching and binding. Difficulty, improve work efficiency.

(2) The present invention adopts a coaxial arrangement, so that the punching and threading are on the same axis, and the precision of punching and threading is improved.

(3) During the punching process of the present invention, the arrangement of the gasket can improve the smoothness of the hole, avoid burrs on the bottom layer of paper, and improve the quality of punching. The fisheye rod end joint bearing linkage rod is used for threading and punching at the same time. The hole pad is moved back so that the threading needle can pass through the punching material smoothly.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is the right side view of the present invention;

4 is a schematic diagram of the internal structure of the present invention (excluding the front support plate and the rear support plate);

Fig. 5 is the internal sectional structure schematic diagram of the present invention;

FIG. 6 is a schematic structural diagram of the punching state in the present invention (excluding the front support plate and the rear support plate);

7 is a schematic diagram of the internal cross-sectional structure of the present invention (excluding the front support plate and the rear support plate) in a state of perforation;

FIG. 8 is a schematic structural diagram of the threading state in the present invention (excluding the front support plate and the rear support plate);

9 is a schematic diagram of the internal cross-sectional structure of the threading state in the present invention (excluding the front support plate and the rear support plate);

10 is a schematic diagram of the split structure of the tray in the present invention;

Fig. 11 is the structural representation about the hood in the present invention;

Marked as: frame 1, upper limit hole 11, lower limit hole 12, power interface 13, power switch 14, hood 15, long paper inlet 16, longitudinal axis 2, first fixing seat 21, limit Position ring 22, upper sleeve 23, lower sleeve 24, return spring 25, drilling limit screw 26, limit block 27, drilling carrier 3, drilling motor 31, travel switch 310, drilling hollow drill 32. Paper scrap device 33, chip reed switch 34, punching pad 4, pad mounting groove 41, pad 42, slider 43, horizontal shaft 44, second fixing seat 45, threading carrier 5, Threading needle 51, thread groove 52, punching handle 6, upper pressing arm 61, upper link 62, upper movable pin 63, upper fixed pin 64, upper connecting pin 65, threading handle 7, lower pressing arm 71, lower link 72. Lower movable pin 73, lower fixed pin 74, lower connecting pin 75, front support plate 81, rear support plate 82, notch 83, platen screw 84, buffer spring 85, platen 86, mounting hole 87, locking screw Cap 88, through hole 89, paper blocking strip 810, screw fixing block 811, first internal thread adjusting handwheel 812, adjusting screw 813, second internal thread adjusting handwheel 814, fisheye rod end joint bearing linkage rod 9. The first fisheye bearing fixing seat 91 , the second fisheye bearing fixing seat 92 , the first fisheye rod end joint bearing 93 , the second fisheye rod end joint bearing 94 , and the paper box 10 .

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. These examples are only intended to illustrate the present invention and not to limit the scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "provided with" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The structural features of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to Figures 1-5, an electric three-hole punching, threading and binding machine includes a frame 1, and longitudinal shafts 2 are vertically arranged on both sides of the inner side of the frame 1, and both ends of the longitudinal shaft 2 pass through the first fixing seat 21. It is fixed on the frame 1. The inside of the frame 1 is provided with a punching mechanism and a threading mechanism for paper binding. The punching mechanism punches the paper vertically from top to bottom, and the threading mechanism punches the holes. The paper is threaded from bottom to top. The electric three-hole punching, threading and binding machine adopts the binding method of upper punching and lower threading to punch and bind the paper. During the whole binding process, the paper does not need to be moved, and the binding is completed in one go Effectively avoid the displacement of paper holes, reduce the difficulty of punching and binding, and improve work efficiency.

The punching mechanism includes a punching carrier plate 3 and a punching push portion that pushes the punching carrier plate 3 to move up and down. The carrier plate 3 will move up and down along the longitudinal axis 2 under the pushing of the punching pushing part.

The punching and pushing part includes a punching handle 6, an upper pressing arm 61, an upper connecting rod 62 and an upper connecting pin 65. The two ends of the punching handle 6 are fixedly installed with symmetrical upper pressing arms 61, and the upper connecting pin 65 is fixed on the punching load. The two ends of the plate 3 and the two sides of the frame 1 are vertically provided with upper limit holes 11 for the upper connecting pin 65 to pass through. The other end of 62 is connected to the upper pressing arm 61 in a rotating manner through the upper movable pin 63, and the end of the upper pressing arm 61 away from the punching handle 6 is installed on the frame 1 through the upper fixing pin 64, and the punching handle 6 is pressed down. , the upper pressing arm 61 will rotate and drive the upper connecting rod 62 under the limit of the upper fixing pin 64 to push the punching carrier plate 3 to move downward, and the punching carrier plate 3 will move vertically downward under the action of the limit of the vertical axis 2 .

Both ends of the punching carrier plate 3 are also provided with a punching limit screw 26 for limiting the up and down displacement stroke of the punching carrier plate 3. The top end of the punching limit screw 26 is fixed on the first fixing seat 21. The bottom end of the position screw 26 is provided with a limit block 27, and the punch limit screw 26 is used to limit the maximum displacement of the punch carrier plate 3 moving downward, and is also the maximum depth of the punch.

At the same time, a limit ring 22 is fixed on the longitudinal axis 2 at the position of the perforated backing plate 4, and a return spring 25 is arranged above the limit ring 22 for supporting the upward reset of the perforated carrier plate 3, and the return spring 25 is sleeved on the vertical axis. On the shaft 2, the punching carrier plate 3 will continuously compress the reset spring 25 during the downward movement. When the hand is released, the reset spring 25 will bounce the punching carrier plate 3 to reset the punching pusher.

The punching carrier plate 3 is provided with three punching motors 31 at equal intervals along its length, and the three punching motors 31 are connected in parallel with a travel switch 310 to control the stroke power-on position of the punching motor 31 and the output end of the punching motor 31 A punching hollow drill 32 is installed, and the punching hollow drill 32 is provided with a paper scrap device 33 for collecting paper scraps. The paper scrap device 33 is fixed on the punching motor 31, and the punching hollow drill 32 penetrates through the hole. Set on the axis line of the paper dust discharge device 33 , the hole for chip removal (not shown in the figure) is provided on the side of the punching hollow drill 32 inside the paper dust discharge device 33 . The side is provided with a chip removal reed 34, and the other end of the chip removal reed 34 is connected with a paper receiving box 10. The paper receiving box 10 is fixed at the lower part of the punching carrier plate 3. confetti.

The vertical shaft 2 set on both sides of the frame 1 and the punching carrier plate 3 form a door-shaped frame; the hollow door-shaped frame structure allows punching materials to pass through the machine body, and the depth of the punching margin can be adjusted arbitrarily to meet various requirements. binding method.

The threading mechanism includes a threading carrier plate 5 and a threading pushing part that pushes the threading carrier plate 5 to move up and down. The threading carrier plate 5 will move up and down along the longitudinal axis 2 under the pushing of the threading pushing part.

The threading push part includes threading handle 7, lower pressing arm 71, lower connecting rod 72, lower movable pin 73, lower fixing pin 74, and lower connecting pin 75. The upper connecting pin 65 is fixed on one end of the threading carrier plate 5, and the rack 1 corresponds to One side of the threading pusher is vertically provided with a lower limit hole 12 for the lower connecting pin 75 to pass through. In the threading handle 7, one end of the lower link 72 is fixedly installed on one side of the lower limit hole 12 through the lower fixing pin 74, and the other end of the lower link 72 is rotatably installed on the lower pressing arm 71 through the lower movable pin 73, By pressing down the threading handle 7 , the lower link 72 will support the pressing arm 71 under the action of the lower fixing pin 74 to drive the threading carrier 5 to move upward, and the threading carrier 5 moves vertically up and down under the limiting action of the longitudinal axis 2 .

A threading needle 51 is coaxially provided on the threading carrier plate 5 at a position corresponding to each hollow punching drill 32, and the threading needle 51 is coaxially arranged with the hollow punching drill 32, so that the threading needle 51 can be vertically passed through the holes of the paper , the ends of the plurality of threading needles 51 are located on the same side with a thread groove 52. When threading, the binding thread is placed in the thread groove 52 in parallel, and is brought into the paper hole by the threading needle 51, and then the thread is knotted Finish binding.

The threading mechanism is provided with a punching pad 4 that can move in parallel, and both ends of the punching pad 4 are fixed on the frame 1 by a linear sliding mechanism. The linear sliding mechanism includes a slider 43 , a horizontal shaft 44 and a second fixing seat 45 . The horizontal shaft 44 is arranged in parallel below the punching pad 4 , and both ends of the horizontal shaft 44 are fixed on the frame 1 through the second fixing seat 45 . , the slider 43 is fixed on the bottom of the punching pad 4, and is sleeved on the horizontal shaft 44 in a sliding manner, and the punching pad 4 can move horizontally under the action of the linear sliding mechanism.

A linkage mechanism for synchronous movement is provided between the punching pad 4 and the threading carrier plate 5. The linkage mechanism includes a fisheye rod end joint bearing linkage rod 9, and a first joint at one end of the fisheye rod end joint bearing linkage rod 9. The fisheye rod end joint bearing 93 is fixed on the threading carrier plate 5 through the first fisheye bearing fixing seat 91 , and the second fisheye rod end joint bearing 94 at the other end is fixedly connected to the punching hole through the second fisheye bearing fixing seat 92 . On the backing plate 4, the punching backing plate 4 is located on the side of the longitudinal axis 2 corresponding to each hole punching hollow drill 32. There is a spacer installation groove 41, and a spacer 42 is placed in the spacer installation groove 41. When punching the paper, the gasket installation groove 41 on the punching pad 4 is located directly below the punching hollow drill 32, the gasket 42 is a rubber gasket, and the punching hollow drill 32 passes through the paper and finally touches the hole. On the gasket 42, the arrangement of the gasket 42 can protect the lowermost paper, make the hole punched by the paper smoother, avoid burrs, and improve the punching quality.

The bottom of one side of the punching pad 4 corresponding to the threading needle 51 is provided with a chamfered portion (not shown in the drawings), which effectively avoids the collision between the threading needle 51 and the punching pad 4 .

As shown in FIG. 10 , a tray for placing paper is provided on the rack 1 and above the punching pad 4 . The tray is formed by splicing a front tray 81 and a rear tray 82 . The front tray 81 and the rear tray 82 is located on the side of the splicing and is provided with an elongated gap 83 for the parallel movement of the punching pad 4 and the threading needle 51 to pass through. The front support plate 81 is provided with a paper fixing device. The cardboard 86 is arranged above the front support plate 81, the two ends of the front support plate 81 are vertically provided with a platen press screw 84, and the two ends of the press plate 86 are provided with mounting holes 87 passing through the platen screw 84. The platen screw 84 A buffer spring 85 is arranged below the pressing board 86 , a locking nut 88 is provided on the pressing board screw 84 above the pressing board 86 , and the pressing board 86 is provided with a long bar corresponding to the position of the punching hollow drill 32 and the threading needle 51 . After the paper is placed on the front support plate 81, it is pressed by the pressing board 86, which can fix the paper, avoid the movement during the punching process, and further improve the precision and quality of the punching. The rear support plate 82 is provided with a paper positioning device. The paper positioning device includes a paper stop strip 810 that can move back and forth. The two ends of one side of the paper stop strip 810 away from the front support plate 81 are rotatably connected with adjusting screw rods 811 and adjusting screw rods 813. The fixing plate 811 is fixed on the edge of the rear support plate 82, the adjusting screw rod 813 is threadedly connected with a first internal thread adjusting handwheel 812, and the end away from the paper blocking strip 810 is threadedly connected with a second internal thread adjusting handwheel 814, The position of the paper stopper 810 can be adjusted synchronously through the adjusting screw rods 813 on both sides of the paper stopper strip 810, and the position of the paper punching can be adjusted. The punching position can be determined by the limit position of the paper stopper 810 and can be set at the end of the paper. the middle or the middle, making the paper punching more accurate.

Referring to FIG. 3 , a power interface 13 and a power switch 14 are provided on the lower base of the frame 1 for supplying power to the electric three-hole punching, threading and binding machine.

Referring to FIG. 11 , a hood 15 for covering the outer side of the upper part of the frame is also provided, and both sides of the bottom of the hood 15 are provided with long strip-shaped paper feed openings 16 therethrough.

In the electric three-hole punching, threading and binding machine of the present invention, the present invention performs punching and binding of paper through the binding method of upper punching and lower threading. The hole shift reduces the difficulty of punching and binding and improves work efficiency. At the same time, the coaxial setting is adopted, so that the punching and threading are on the same axis, and the precision of punching and threading is improved. During the punching process, the smoothness of the punched holes can be improved, the burrs on the bottom layer of paper can be avoided, and the punching quality can be improved.

Specifically, when using, referring to Figures 6-7, when the paper is punched (the paper is not drawn in the figure), the paper punching position is determined by the paper positioning device, and then the paper to be punched is fixed by the paper fixing device. Keep the threading pusher still in one step. At this time, the threading needle 51 on the threading carrier plate 5 is located below the punching pad 4. Press down the punching handle 6 to punch the paper. The plate 3 is raised and reset again under the action of the return spring 25, and then the binding line is placed in the thread groove 52, as shown in Fig. 8-9, and then the threading handle 7 is pressed down, and the threading push part pushes the threading carrier plate 5 to move up at the same time. The connecting rod 9 of the fisheye rod end joint bearing synchronously moves the punching pad 4 on the horizontal shaft 44 to move backward, and the threading needle 51 moves upward from the position of the notch 83 corresponding to the three punching hollow drills 32 provided on the same axis. When the threading needle 51 rises and the punching pad 4 moves backward, the threading needle 51 can pass through the punched hole smoothly, so that the punching pad 4 avoids the upwardly moving threading needle 51, and the threading needle 51 passes through the hole. After passing through the hole in the paper, pass the binding line through the hole, and finally manually tie the knot to complete the binding of the document paper. After completion, the threading carrier plate 5 will be reset under the action of gravity.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still understand the foregoing embodiments. The technical solutions described are modified, or some technical features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. An all-in-one electric three-hole punching, threading and binding machine, comprising a frame (1), characterized in that a longitudinal axis (2) is vertically provided on both sides of the inner side of the frame (1), and the longitudinal axis The two ends of (2) are fixed on the frame (1) through the first fixing seat (21), and the inside of the frame (1) is coaxially provided with a punching mechanism and a threading mechanism for paper binding. The threading mechanism is provided with a punching pad (4) that can move in parallel, and both ends of the punching pad (4) are fixed on the frame (1) by a linear sliding mechanism; The punching mechanism includes a punching carrier plate (3) and a punching pusher that pushes the punching carrier plate (3) to move up and down, and both ends of the punching carrier plate (3) pass through the upper shaft sleeve (23) to move the punching plate (3). It is assembled on the longitudinal axis (2) in a sliding manner, and three punching motors (31) are arranged on the punching carrier plate (3) at equal intervals along its length, and the three punching motors (31) are connected in parallel with travel switches ( 310), used to control the stroke power-on position of the punching motor (31), and the output end of the punching motor (31) is provided with a punching hollow drill (32); The longitudinal axis (2) provided on both sides of the frame (1) and the punching carrier plate (3) form a door-shaped frame; The threading mechanism includes a threading carrier plate (5) and a threading pushing portion that pushes the threading carrier plate (5) to move up and down, and both ends of the threading carrier plate (5) are assembled on the lower bushings (24) in a sliding manner. On the longitudinal axis (2), a threading needle (51) is coaxially provided on the threading carrier plate (5) at a position corresponding to each hole punching hollow drill (32), and the ends of the three threading needles (51) are located at A wire slot (52) is provided on the same side; A linkage mechanism for synchronous movement is arranged between the punching pad (4) and the threading carrier plate (5), and the linkage mechanism includes a fisheye rod end joint bearing linkage rod (9). The first fisheye rod end joint bearing (93) at one end of the rod end joint bearing linkage rod (9) is fixed on the threading carrier plate (5) through the first fisheye bearing fixing seat (91), and the second fisheye at the other end is fixed on the threading carrier plate (5). The eye rod end joint bearing (94) is fixed on the punching pad (4) through the second fisheye bearing fixing seat (92); Said punching backing plate (4) is located on one side of the longitudinal axis (2) corresponding to the positions of the three punching hollow drills (32) and is provided with a gasket installation groove (41), and the gasket installation groove (41) is provided with a gasket installation groove (41). A spacer (42) is placed; A tray for placing paper is arranged on the frame (1) and above the punching pad (4), and the tray is formed by splicing a front supporting plate (81) and a rear supporting plate (82). The front support plate (81) and the rear support plate (82) are located on the side of the splicing and are provided with an elongated gap (83) for the parallel movement of the punching pad (4) and the threading needle (51) passing through; The lower base of the frame (1) is provided with a power interface (13) and a power switch (14) for supplying power to the electric three-hole punching, threading and binding machine; A hood (15) for covering the outer side of the upper part of the frame (1) is also provided, and two sides of the bottom of the hood (15) are provided with long strip-shaped paper inlets (16). 2. An electric three-hole punching, threading and binding machine according to claim 1, wherein the linear sliding mechanism comprises a slider (43), a horizontal shaft (44) and a second fixing seat (45) , the horizontal shaft (44) is arranged in parallel below the punching pad (4), and both ends of the horizontal shaft (44) are fixed on the frame (1) through the second fixing seat (45), The slider (43) is fixed on the bottom of the punching pad (4), and is sleeved on the horizontal shaft (44) in a sliding manner. 3. An electric three-hole punching, threading and binding machine according to claim 1, wherein the punching push part comprises a punching handle (6), an upper pressing arm (61), an upper connecting rod (6). 62) and an upper connecting pin (65), the two ends of the punching handle (6) are fixedly installed with symmetrical upper pressing arms (61), and the upper connecting pin (65) is fixed on the punching carrier plate (3). Both ends, the two sides of the frame (1) are vertically provided with upper limit holes (11) for the upper connecting pin (65) to pass through, and one end of the upper connecting rod (62) is rotatably installed on the On the upper connecting pin (65), the other end of the upper connecting rod (62) is rotationally connected to the upper pressing arm (61) through the upper movable pin (63), and the upper pressing arm (61) is far away from the punching hole One end of the handle (6) is mounted on the frame (1) through an upper fixing pin (64). 4. An electric three-hole punching, threading and binding machine according to claim 1, wherein the threading pusher comprises a threading handle (7), a pressing arm (71), a lower connecting rod (72) , a lower movable pin (73), a lower fixing pin (74), and a lower connecting pin (75), the upper connecting pin (65) is fixed on one end of the threading carrier plate (5), and the rack (1) corresponds to threading One side of the push portion is vertically provided with a lower limit hole (12) for the lower connecting pin (75) to pass through, and one end of the lower pressing arm (71) is rotatably mounted on the lower connecting pin (75) , the other end of the pressing arm (71) is fixedly installed on the threading handle (7), one end of the lower connecting rod (72) is fixedly installed on one side of the lower limit hole (12) through the lower fixing pin (74), The other end of the connecting rod (72) is rotatably mounted on the lower pressing arm (71) through the lower movable pin (73). 5. An electric three-hole punching, threading and binding machine according to claim 1, characterized in that a limit ring (22) is fixed at the position of the punching pad (4) on the longitudinal axis (2). ), a return spring (25) for supporting the punching carrier plate (3) to return upward is arranged above the limit ring (22), and the return spring (25) is sleeved on the longitudinal shaft (2). 6. An electric three-hole punching, threading and binding machine according to claim 1, characterized in that, both ends of the punching carrier plate (3) are also provided with a punching carrier plate (3) for limiting the punching carrier plate (3). The punching limit screw (26) for the up and down displacement stroke, the top end of the punching limit screw (26) is fixed on the first fixing seat (21), and the bottom end of the punching limit screw (26) is provided with a limit Block (27). 7. The electric three-hole punching, threading and binding machine according to claim 1, wherein a paper fixing device is provided on the front support plate (81), and the paper fixing device comprises a pressing board (86). ), the press board (86) is arranged above the front support plate (81), the two ends of the front support board (81) are vertically provided with press board screws (84), and the two ends of the press board (86) There is a mounting hole (87) passing through the platen screw (84), the platen screw (84) is located below the platen (86) and a buffer spring (85) is provided, and the platen screw (84) is located in the platen (86). ) is provided with a locking nut (88), and the pressing board (86) is provided with an elongated through hole (89) at the position corresponding to the hollow drill (32) and the threading needle (51). 8. An electric three-hole punching, threading and binding machine according to claim 1, characterized in that, a paper positioning device is provided on the rear support plate (82), and the paper positioning device comprises a front and rear movable A paper blocking strip (810), two ends of one side of the paper blocking strip (810) away from the front support plate (81) are rotatably connected with adjusting screw rods (813), and the adjusting screw rods (813) pass through the fixing plate (811) ) is fixed on the edge of the rear support plate (82), the adjusting screw (813) is threadedly connected with a first internal thread adjusting handwheel (812), and the end away from the paper stop strip (810) is threadedly connected with a second Female adjustment handwheel (814). 9 . The electric three-hole punching, threading and binding machine according to claim 1, characterized in that, a paper scrap device (33) is provided on the punching hollow drill (32), and the paper discharging device (33) One side of the chip device (33) is provided with a chip removal reed pipe (34), the other end of the chip removal reed pipe (34) is connected with a paper receiving box (10), and the paper receiving box (10) is fixed on the punching carrier. The lower part of the plate (3).

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