An electric three-hole punching, threading and binding machine

Abstract

The present invention discloses an electric three-hole punching and threading binding machine, which relates to the technical field of paper processing and punching machines, and comprises a frame, wherein longitudinal axes are arranged on both sides of the frame, and a punching mechanism and a threading mechanism are arranged coaxially on the longitudinal axes. A punching pad that can move in parallel is synchronously linked on the threading mechanism, and the two ends of the punching pad are fixed on the frame through a linear sliding mechanism; the punching mechanism comprises a punching carrier plate and a punching push part that pushes the punching carrier plate to move up and down, and three punching motors are arranged at equal intervals on the punching carrier plate; the threading mechanism comprises a threading carrier plate and a threading push part that pushes the threading carrier plate to move up and down, and a threading needle is arranged coaxially on the threading carrier plate corresponding to the position of each punching hollow drill; a tray is arranged on the frame and above the punching pad plate. The present invention can complete the punching, threading and binding in one go, effectively avoid the displacement of paper holes, reduce the difficulty of punching, threading and binding, and greatly improve the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of paper processing, archival document filing, roll and file binding, and punching machines, and in particular to an electric three-hole punching, threading and binding all-in-one machine. Background Art

[0002] After completion, documents and files need to be bound and sealed. In the binding process, the paper needs to be punched with a puncher first, and then threaded and bound. The thickness of the paper is generally dozens or even hundreds of pages. In the process of punching the paper, the paper needs to be kept flat, the holes should be smooth and there should be no wrinkles. The existing punching machine has a single structure and the depth of the punching page margins is limited. The file binding cannot be completed by threading. The roll cover and the file need to be punched separately. After the holes are punched, the roll cover and the file are removed and threaded and bound separately. This will undoubtedly cause the movement of the papers, resulting in misalignment of the punching, affecting the threading and binding, and also causing wrinkles in the paper, affecting the binding. At the same time, the work efficiency is low and the appearance is not good. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art, such as single structure, great difficulty in binding and low working efficiency, and to propose an electric three-hole punching and threading binding machine.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An electric three-hole punching and threading binding machine is designed, comprising a frame, longitudinal axes are vertically arranged on both sides of the frame, and the two ends of the longitudinal axes are fixed to the frame through a first fixing seat, and a punching mechanism and a threading mechanism for paper binding are coaxially arranged in the frame from top to bottom, and a punching pad that can move in parallel is synchronously linked on the threading mechanism, and the two ends of the punching pad are fixed to the frame through a linear sliding mechanism;

[0006] 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 two ends of the punching carrier plate are slidably assembled on the longitudinal axis through upper sleeves. Three punching motors are evenly spaced along the length of the punching carrier plate. The three punching motors are connected in parallel with travel switches to control the travel power-on position of the punching motor. A punching hollow drill is installed at the output end of the punching motor.

[0007] The longitudinal axes arranged on both sides of the frame and the punching carrier plate form a door-shaped frame; the hollow door-shaped frame structure allows the punched materials to pass through the machine body, so that the depth of the punched page margins can be adjusted arbitrarily, and a variety of binding methods can be achieved.

[0008] The threading mechanism includes a threading carrier plate and a threading pusher for pushing the threading carrier plate to move up and down. The two ends of the threading carrier plate are slidably mounted on the longitudinal axis through a lower sleeve. The threading carrier plate is coaxially provided with threading needles corresponding to the position of each punching hollow drill. The ends of the three threading needles are located on the same side and provided with thread grooves.

[0009] A synchronously moving linkage mechanism is provided between the punching pad and the threading carrier plate, the linkage mechanism comprises a fisheye rod end joint bearing linkage rod, a first fisheye rod end joint bearing at one end of the fisheye rod end joint bearing linkage rod is fixed to the threading carrier plate through a first fisheye bearing fixing seat, and a second fisheye rod end joint bearing at the other end is fixed to the punching pad through a second fisheye bearing fixing seat;

[0010] The punching pad is located on one side of the longitudinal axis and is provided with gasket installation grooves corresponding to the positions of the three punching hollow drill bits, and gaskets are placed in the gasket installation grooves;

[0011] A tray for placing paper is provided on the frame and above the punching pad. The tray is formed by splicing a front support plate and a rear support plate. A long strip notch is provided on one side of the splicing of the front support plate and the rear support plate for parallel movement of the punching pad and for the threading needle to pass through.

[0012] A power interface and a power switch for supplying power to the electric three-hole punching, threading and binding all-in-one machine are arranged on the lower base of the frame.

[0013] A machine cover is also provided for covering the outer side of the upper part of the frame, and both sides of the bottom of the machine cover are provided with penetrating long strip paper feeding ports.

[0014] Furthermore, the linear sliding mechanism includes a slider, a transverse axis and a second fixed seat. The transverse axis is arranged parallel to the bottom of the punching plate. Both ends of the transverse axis are fixed to the frame through the second fixed seat. The slider is fixed to the bottom of the punching plate and is slidably mounted on the transverse axis.

[0015] Furthermore, the punching pushing part includes a punching handle, an upper pressure arm, an upper connecting rod and an upper connecting pin. The two ends of the punching handle are fixedly installed with symmetrical upper pressure arms. The upper connecting pins are fixed to the two ends of the punching carrier plate. Upper limit holes for the upper connecting pins to pass through are vertically provided on both sides of the frame. One end of the upper connecting rod is rotatably mounted on the upper connecting pin, and the other end of the upper connecting rod is rotatably connected to the upper pressure arm through an upper movable pin. The end of the upper pressure arm away from the punching handle is mounted on the frame through an upper fixed pin.

[0016] Furthermore, the threading pushing part includes a threading handle, a lower pressure arm, a lower connecting rod, a lower movable pin, a lower fixed pin, and a lower connecting pin. The lower connecting pin is fixed to one end of the threading carrier plate, and a lower limit hole for the lower connecting pin to pass through is vertically provided on one side of the frame corresponding to the threading pushing part. One end of the lower pressure arm is rotatably mounted on the lower connecting pin, and the other end of the lower pressure arm is rotatably mounted on the threading handle. One end of the lower connecting rod is fixedly mounted on one side of the lower limit hole through the lower fixed pin, and the other end of the lower connecting rod is rotatably mounted on the lower pressure arm through the lower movable pin.

[0017] Furthermore, a limiting ring is fixedly provided on the longitudinal axis at the position of the punching pad, and a reset spring for supporting the punching carrier plate to reset upward is provided above the limiting ring, and the reset spring is sleeved on the longitudinal axis.

[0018] Furthermore, both ends of the punching carrier plate are penetrated by punching limit screws for limiting the up and down displacement stroke of the punching carrier plate, the top end of the punching limit screw is fixed on the first fixing seat, and the bottom end of the punching limit screw is provided with a limit block.

[0019] Furthermore, a paper pressing plate is provided above the front support plate, screws are vertically provided at both ends of the front support plate, mounting holes for passing the screws are provided at both ends of the paper pressing plate, a buffer spring is provided below the screw, a locking nut is provided above the screw, and the paper pressing plate is provided with long strip-shaped through holes at positions corresponding to the punching hollow drill and the threading needle.

[0020] Furthermore, a paper positioning device is provided on the rear support plate, and the paper positioning device includes a paper stop strip which can be moved forward and backward, and the two ends of the paper stop strip on the side away from the front support plate are rotatably connected to an adjusting screw rod, and the adjusting screw rod is fixed to the edge of the rear support plate through a fixing plate, and a first internally threaded adjusting hand wheel is threadedly connected to the adjusting screw rod, and a second internally threaded adjusting hand wheel is threadedly connected to the end away from the paper stop strip.

[0021] Furthermore, the perforating hollow drill is provided with a paper scrap discharge device, one side of the paper scrap discharge device is provided with a chip discharge reed pipe, the other end of the chip discharge reed pipe is connected to a paper receiving box, and the paper receiving box is fixed to the lower part of the perforated carrier plate.

[0022] The electric three-hole punching, threading and binding machine proposed by the present invention has the following beneficial effects:

[0023] (1) The present invention performs hole punching and binding of paper by a binding method of upper punching and lower threading. During the entire binding process, the paper does not need to be moved and the binding is completed in one go, which effectively avoids the displacement of the paper holes, reduces the difficulty of hole punching and binding, and improves work efficiency.

[0024] (2) The present invention adopts a coaxial setting so that the punching and threading are on the same axis, thereby improving the accuracy of the punching and threading.

[0025] (3) During the punching process of the present invention, the setting of the gasket can improve the smoothness of the hole, avoid the appearance of burrs on the bottom layer of paper, and improve the quality of the punching. When the fisheye rod end joint bearing is used to connect the rod to thread the thread, the punching pad is moved backward so that the threading needle can smoothly pass through the punching material. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 is a front view of the present invention;

[0029] Figure 3 It is a right side view of the present invention;

[0030] Figure 4 It is a schematic diagram of the internal structure of the present invention (excluding the front support plate and the rear support plate);

[0031] Figure 5 It is a schematic diagram of the internal cross-sectional structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the punching state in the present invention (excluding the front support plate and the rear support plate);

[0033] Figure 7 It is a schematic diagram of the internal cross-sectional structure in the punching state of the present invention (excluding the front support plate and the rear support plate);

[0034] Figure 8 It is a structural schematic diagram of the threading state in the present invention (excluding the front support plate and the rear support plate);

[0035] Fig. 9 It 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);

[0036] Fig.10 It is a schematic diagram of the split structure of the tray in the present invention;

[0037] Fig.11 It is a schematic diagram of the structure of the machine cover in the present invention;

[0038] Marked in the figure: frame 1, upper limit hole 11, lower limit hole 12, power interface 13, power switch 14, machine cover 15, long strip paper inlet 16, longitudinal axis 2, first fixed seat 21, limit ring 22, upper sleeve 23, lower sleeve 24, return spring 25, punching limit screw 26, limit block 27, punching carrier 3, punching motor 31, travel switch 310, punching hollow drill 32, paper scrap discharge device 33, chip discharge spring switch 34, punching pad 4, gasket installation groove 41, gasket 42, slider 43, horizontal axis 44, second fixed seat 45, threading carrier 5, threading needle 51, wire groove 52, punching handle 6, upper pressure arm 61, upper connecting rod 62, upper movable pin 63 , upper fixing pin 64, upper connecting pin 65, threading handle 7, lower pressure arm 71, lower connecting rod 72, lower movable pin 73, lower fixing pin 74, lower connecting pin 75, front support plate 81, rear support plate 82, notch 83, paper pressing screw 84, buffer spring 85, paper pressing board 86, mounting hole 87, locking nut 88, through hole 89, paper stop strip 810, screw fixing block 811, first internal thread adjusting hand wheel 812, adjusting screw 813, second internal thread adjusting hand wheel 814, fisheye rod end joint bearing linkage rod 9, first fisheye bearing fixing seat 91, second fisheye bearing fixing seat 92, first fisheye rod end joint bearing 93, second fisheye rod end joint bearing 94, paper receiving box 10. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with specific embodiments. These embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The structural features of the present invention are now described in detail with reference to the accompanying drawings.

[0041] See also Figure 1-5An electric three-hole punching and threading binding machine comprises a frame 1, longitudinal axes 2 are vertically arranged on both sides of the frame 1, and both ends of the longitudinal axes 2 are fixed to the frame 1 through a first fixing seat 21. A punching mechanism and a threading mechanism for paper binding are coaxially arranged in the frame 1 from top to bottom. The punching mechanism vertically punches holes in the paper from top to bottom, and the threading mechanism threads the punched paper from bottom to top. The electric three-hole punching and threading 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, which effectively avoids the displacement of the paper holes, reduces the difficulty of punching and binding, and improves the work efficiency.

[0042] The punching mechanism includes a punching carrier plate 3 and a punching push part that pushes the punching carrier plate 3 to move up and down. Both ends of the punching carrier plate 3 are slidably assembled on the longitudinal axis 2 through an upper sleeve 23. The punching carrier plate 3 moves up and down along the longitudinal axis 2 under the push of the punching push part.

[0043] The punching pushing part includes a punching handle 6, an upper pressure 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 pressure arms 61, and the upper connecting pin 65 is fixed to the two ends of the punching carrier 3. Upper limit holes 11 for the upper connecting pin 65 to pass through are vertically provided on both sides of the frame 1. One end of the upper connecting rod 62 is rotatably mounted on the upper connecting pin 65, and the other end of the upper connecting rod 62 is rotatably connected to the upper pressure arm 61 through an upper movable pin 63. The end of the upper pressure arm 61 away from the punching handle 6 is mounted on the frame 1 through an upper fixed pin 64. By pressing the punching handle 6 downward, the upper pressure arm 61 will rotate and drive the upper connecting rod 62 under the limit of the upper fixed pin 64 to push the punching carrier 3 to move downward, and the punching carrier 3 moves vertically downward under the action of the limit of the longitudinal axis 2.

[0044] Both ends of the punching carrier 3 are also penetrated by punching limit screws 26 for limiting the up and down displacement stroke of the punching carrier 3. The top end of the punching limit screw 26 is fixed on the first fixed seat 21, and the bottom end of the punching limit screw 26 is provided with a limit block 27. The punching limit screw 26 is used to limit the maximum downward displacement of the punching carrier 3, which is also the maximum depth of the punching.

[0045] At the same time, a limit ring 22 is fixedly provided on the longitudinal axis 2 at the position of the punching pad 4, and a return spring 25 for supporting the punching carrier 3 to return upward is provided above the limit ring 22. The return spring 25 is sleeved on the longitudinal axis 2. The punching carrier 3 will continuously compress the return spring 25 during the downward movement. When the hand is released, the return spring 25 will bounce the punching carrier 3 up, so that the punching push part is reset.

[0046] Three punching motors 31 are arranged at equal intervals along the length of the punching carrier 3. The three punching motors 31 are connected in parallel with a travel switch 310 for controlling the travel power-on position of the punching motor 31. A punching hollow drill 32 is installed at the output end of the punching motor 31, and a paper scrap discharge device 33 for collecting paper scraps is provided on the punching hollow drill 32. The paper scrap discharge device 33 is fixed on the punching motor 31. The punching hollow drill 32 passes through the axis of the paper scrap discharge device 33. A hole for chip discharge (not marked in the figure) is provided on one side of the punching hollow drill 32 located inside the paper scrap discharge device 33. A chip discharge reed pipe 34 is provided on one side of the paper scrap discharge device 33. The other end of the chip discharge reed pipe 34 is connected to a paper receiving box 10. The paper receiving box 10 is fixed to the lower part of the punching carrier 3. The paper receiving box 10 is used to hold paper scraps generated by punching.

[0047] The longitudinal axes 2 and the perforated carrier plates 3 arranged on both sides of the frame 1 form a door-shaped frame; the hollow door-shaped frame structure allows the perforated materials to pass through the machine body, so that the perforated page margins can be adjusted arbitrarily, and various binding methods can be realized.

[0048] The threading mechanism includes a threading carrier plate 5 and a threading pusher for pushing the threading carrier plate 5 up and down. Both ends of the threading carrier plate 5 are slidably mounted on the longitudinal axis 2 through a lower sleeve 24. The threading carrier plate 5 moves up and down along the longitudinal axis 2 under the push of the threading pusher.

[0049] The threading pushing portion includes a threading handle 7, a lower pressure arm 71, a lower connecting rod 72, a lower movable pin 73, a lower fixed pin 74, and a lower connecting pin 75. The lower connecting pin 75 is fixed to one end of the threading carrier plate 5. A lower limit hole 12 for the lower connecting pin 75 to pass through is vertically provided on one side of the frame 1 corresponding to the threading pushing portion. One end of the lower pressure arm 71 is rotatably mounted on the lower connecting pin 75, and the other end of the lower pressure arm 71 is rotatably mounted on the threading handle 7. One end of the lower connecting rod 72 is fixedly mounted on one side of the lower limit hole 12 through the lower fixed pin 74, and the other end of the lower connecting rod 72 is rotatably mounted on the lower pressure arm 71 through the lower movable pin 73. By pressing down the threading handle 7, the lower connecting rod 72 will support the lower pressure arm 71 under the action of the lower fixed pin 74 to drive the threading carrier plate 5 to move upward, and the threading carrier plate 5 moves vertically up and down under the limiting action of the longitudinal axis 2.

[0050] A threading needle 51 is coaxially provided on the threading carrier 5 corresponding to the position of each punching hollow drill 32. The threading needle 51 is coaxially arranged with the punching hollow drill 32, so that the threading needle 51 can vertically pass through the hole in the paper. The ends of multiple threading needles 51 are located on the same side and a wire groove 52 is provided. When threading, the binding wire is placed in parallel in the wire groove 52, and is brought by the threading needle 51 to pass through the hole in the paper, and then the wire is knotted to complete the binding.

[0051] The threading mechanism is synchronously linked with a punching pad 4 that can move in parallel, and both ends of the punching pad 4 are fixed to the frame 1 through a linear sliding mechanism. The linear sliding mechanism includes a slider 43, a transverse axis 44 and a second fixed seat 45. The transverse axis 44 is arranged parallel to the bottom of the punching pad 4, and both ends of the transverse axis 44 are fixed to the frame 1 through the second fixed seat 45. The slider 43 is fixed to the bottom of the punching pad 4 and is slidably sleeved on the transverse axis 44. The punching pad 4 can move horizontally under the action of the linear sliding mechanism.

[0052] A synchronously moving linkage mechanism is provided between the punching pad 4 and the threading carrier 5, and the linkage mechanism includes a fisheye rod end joint bearing linkage rod 9. A first fisheye rod end joint bearing 93 at one end of the fisheye rod end joint bearing linkage rod 9 is fixed to the threading carrier 5 through a first fisheye bearing fixing seat 91, and a second fisheye rod end joint bearing 94 at the other end is fixedly connected to the punching pad 4 through a second fisheye bearing fixing seat 92. The punching pad 4 is located on one side of the longitudinal axis 2 and a gasket mounting groove 41 is provided at a position corresponding to each punching hollow drill 32. A gasket 42 is placed in the gasket mounting groove 41. When punching paper, the gasket mounting groove 41 on the punching pad 4 is located directly below the punching hollow drill 32. The gasket 42 is a rubber gasket. The punching hollow drill 32 passes through the paper and finally rests on the gasket 42. The setting of the gasket 42 can protect the bottom paper, make the holes punched in the paper smoother, avoid burrs, and improve the punching quality.

[0053] A chamfered portion (not shown in the drawings) is provided at the bottom of one side of the punching plate 4 corresponding to the threading needle 51 , which effectively prevents the threading needle 51 from colliding with the punching plate 4 .

[0054] like Fig.10As shown, a tray for placing paper is provided on the frame 1 and above the punching pad 4. The tray is formed by splicing a front support plate 81 and a rear support plate 82. The front support plate 81 and the rear support plate 82 are provided with a long strip-shaped notch 83 on one side of the splicing for the punching pad 4 to move parallel and the threading needle 51 to pass through. A paper fixing device is provided on the front support plate 81. The paper fixing device includes a paper pressing board 86. The paper pressing board 86 is arranged above the front support plate 81. Paper pressing board screws 84 are vertically provided at both ends of the front support plate 81. Both ends of the plate 86 are provided with mounting holes 87 for passing the paper pressing screw 84, a buffer spring 85 is provided below the paper pressing screw 84 and a locking nut 88 is provided above the paper pressing screw 84. The paper pressing 86 is provided with a long through hole 89 corresponding to the position of the hollow drill 32 and the threading needle 51. After the paper is placed on the front support plate 81, it is pressed by the paper pressing 86 to fix the paper and prevent it from moving during the punching process, thereby further improving the accuracy and quality of the punching. A paper positioning device is provided on the rear support plate 82, and the paper positioning device includes a paper stop strip 810 that can be moved forward and backward. The two ends of the side of the paper stop strip 810 away from the front support plate 81 are rotatably connected with an adjusting screw rod 811. The adjusting screw rod 813 is fixed to the edge of the rear support plate 82 through a fixing plate 811. The adjusting screw rod 813 is threadedly connected with a first internal thread adjusting hand wheel 812, and the end away from the paper stop strip 810 is threadedly connected with a second internal thread adjusting hand wheel 814. The position of the paper stop strip 810 is synchronously adjusted by the adjusting screw rods 813 on both sides of the paper stop strip 810, so the position of the paper punching can be adjusted. The punching position can be determined by the limit position of the paper stop strip 810, and can be set at the end or the middle of the paper, so that the paper punching is more accurate.

[0055] See also Figure 3 A power interface 13 and a power switch 14 for supplying power to the electric three-hole punching and threading binding machine are provided on the lower base of the frame 1.

[0056] See also Fig.11 A machine cover 15 is also provided for covering the outer side of the upper part of the frame, and both sides of the bottom of the machine cover 15 are provided with a through long strip paper feed port 16.

[0057] The electric three-hole punching and threading binding machine of the present invention performs punching and binding of paper by a binding method of upper punching and lower threading. During the entire binding process, the paper does not need to be moved, and the binding is completed in one go, effectively avoiding the displacement of the paper holes, reducing the difficulty of punching and binding, and improving work efficiency. At the same time, a coaxial setting is adopted, so that the punching and threading are on the same axis, thereby improving the accuracy of the punching and threading. During the punching process, the smoothness of the hole can be improved, and the burrs on the bottom layer of paper can be avoided, thereby improving the quality of the punching.

[0058] Specifically, when using, refer to Figure 6-7As shown, when punching a paper (paper is not shown 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. In the next step, the threading pusher is kept stationary. At this time, the threading needle 51 on the threading carrier plate 5 is located below the punching pad 4. The punching handle 6 is pressed down by hand to punch the paper. After the punching is completed, the punching carrier plate 3 is raised and reset again under the action of the reset spring 25, and then the binding wire is placed in the wire groove 52. Figure 8-9 As shown, the threading handle 7 is then pressed down, and the threading push part pushes the threading carrier 5 to move upward. At the same time, the fisheye rod end joint bearing linkage rod 9 synchronously links the punching pad 4 on the horizontal axis 44 to move backward, and the threading needle 51 passes through the holes punched by the three coaxially arranged hollow drills 32 from the notch 83 position upward. The threading needle 51 rises and the punching pad 4 moves backward. The threading needle 51 can smoothly pass through the punched holes, so that the punching pad 4 avoids the threading needle 51 moving upward. After the threading needle 51 passes through the hole in the paper, the binding thread is passed through the hole, and finally the knot is manually tied to complete the binding work of the document paper. After completion, the threading carrier 5 will be reset under the action of gravity.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric three-hole punching and threading binding machine, comprising a frame (1), characterized in that: A longitudinal axis (2) is vertically arranged on both sides of the interior of the frame (1), and the two ends of the longitudinal axis (2) are fixed to the frame (1) via a first fixing seat (21). A punching mechanism and a threading mechanism for paper binding are coaxially arranged in the upper and lower parts of the frame (1), and a punching pad (4) that can move in parallel is synchronously and linked to the threading mechanism, and the two ends of the punching pad (4) are fixed to the frame (1) via a linear sliding mechanism. The punching mechanism comprises a punching carrier plate (3) and a punching push part for pushing the punching carrier plate (3) to move up and down, the two ends of the punching carrier plate (3) are slidably mounted on the longitudinal axis (2) via an upper shaft sleeve (23), three punching motors (31) are arranged at equal intervals along the length of the punching carrier plate (3), the three punching motors (31) are connected in parallel with a travel switch (310) for controlling the travel power-on position of the punching motor (31), and a punching hollow drill (32) is installed at the output end of the punching motor (31); The longitudinal axes (2) arranged on both sides of the frame (1) and the perforated carrier plate (3) form a door-shaped frame; The threading mechanism comprises a threading carrier plate (5) and a threading pusher for pushing the threading carrier plate (5) to move up and down, the two ends of the threading carrier plate (5) are slidably mounted on the longitudinal axis (2) via a lower sleeve (24), a threading needle (51) is coaxially arranged on the threading carrier plate (5) corresponding to the position of each hollow drilling tool (32), and the ends of the three threading needles (51) are located on the same side and are provided with a thread groove (52); A synchronously moving linkage mechanism is provided between the punching pad (4) and the threading carrier (5), the linkage mechanism comprising a fisheye rod end joint bearing linkage rod (9), a first fisheye rod end joint bearing (93) at one end of the fisheye rod end joint bearing linkage rod (9) being fixed to the threading carrier (5) via a first fisheye bearing fixing seat (91), and a second fisheye rod end joint bearing (94) at the other end being fixed to the punching pad (4) via a second fisheye bearing fixing seat (92); The punching pad (4) is provided with gasket installation grooves (41) at positions corresponding to the three punching hollow drill bits (32) on one side of the longitudinal axis (2), and gaskets (42) are placed in the gasket installation grooves (41); A tray for placing paper is provided on the frame (1) and above the punching pad (4), the tray being formed by splicing a front support plate (81) and a rear support plate (82), and a long strip-shaped notch (83) is provided on one side of the splicing of the front support plate (81) and the rear support plate (82) for the punching pad (4) to move parallel to and for the threading needle (51) to pass through; A power interface (13) and a power switch (14) for supplying power to the electric three-hole punching, threading and binding machine are provided on the lower base of the frame (1); A machine cover (15) is also provided for covering the outer side of the upper part of the frame (1), and two sides of the bottom of the machine cover (15) are provided with long strip-shaped paper feed openings (16) extending therethrough; The linear sliding mechanism comprises a slider (43), a transverse axis (44) and a second fixing seat (45); the transverse axis (44) is arranged parallel to the bottom of the punching pad (4); both ends of the transverse axis (44) are fixed to the frame (1) through the second fixing seat (45); the slider (43) is fixed to the bottom of the punching pad (4) and is sleeved on the transverse axis (44) in a sliding manner; The punching push part comprises a punching handle (6), an upper pressure arm (61), an upper connecting rod (62) and an upper connecting pin (65); symmetrical upper pressure arms (61) are fixedly mounted at both ends of the punching handle (6); the upper connecting pin (65) is fixedly mounted at both ends of the punching carrier plate (3); upper limit holes (11) for the upper connecting pin (65) to pass through are vertically arranged on both sides of the frame (1); one end of the upper connecting rod (62) is rotatably mounted on the upper connecting pin (65); the other end of the upper connecting rod (62) is rotatably connected to the upper pressure arm (61) via an upper movable pin (63); and one end of the upper pressure arm (61) away from the punching handle (6) is mounted on the frame (1) via an upper fixed pin (64); The threading pushing portion comprises a threading handle (7), a lower pressure arm (71), a lower connecting rod (72), a lower movable pin (73), a lower fixed pin (74), and a lower connecting pin (75); the lower connecting pin (75) is fixed to one end of the threading carrier plate (5); a lower limit hole (12) for the lower connecting pin (75) to pass through is vertically provided on one side of the frame (1) corresponding to the threading pushing portion; one end of the lower pressure arm (71) is rotatably mounted on the lower connecting pin (75); the other end of the lower pressure arm (71) is fixedly mounted on the threading handle (7); one end of the lower connecting rod (72) is fixedly mounted on one side of the lower limit hole (12) via the lower fixed pin (74); the other end of the lower connecting rod (72) is rotatably mounted on the lower pressure arm (71) via the lower movable pin (73); The front support plate (81) is provided with a paper fixing device, the paper fixing device comprising a paper pressing plate (86), the paper pressing plate (86) is arranged above the front support plate (81), and paper pressing plate screws (84) are vertically provided at both ends of the front support plate (81), and mounting holes (87) are provided at both ends of the paper pressing plate (86) for passing through the paper pressing plate screw (84), the paper pressing plate screw (84) is provided with a buffer spring (85) below the paper pressing plate (86), and the paper pressing plate screw (84) is provided with a locking nut (88) above the paper pressing plate (86), and the paper pressing plate (86) is provided with a long strip through hole (89) at the position corresponding to the punching hollow drill (32) and the threading needle (51); The rear support plate (82) is provided with a paper positioning device, the paper positioning device comprising a paper stop strip (810) that can be moved forwards and backwards, the two ends of the paper stop strip (810) on a side away from the front support plate (81) are rotatably connected to an adjusting screw rod (813), the adjusting screw rod (813) is fixed to the edge of the rear support plate (82) through a fixing plate (811), a first internally threaded adjusting hand wheel (812) is threadedly connected to the adjusting screw rod (813), and a second internally threaded adjusting hand wheel (814) is threadedly connected to the end away from the paper stop strip (810).

2. The electric three-hole punching and threading binding machine according to claim 1, characterized in that: A limiting ring (22) is fixedly provided on the longitudinal axis (2) at the position of the punching pad (4), and a return spring (25) for supporting the punching carrier (3) to return upward is provided above the limiting ring (22), and the return spring (25) is sleeved on the longitudinal axis (2).

3. The electric three-hole punching and threading binding machine according to claim 1, characterized in that: Both ends of the punching carrier plate (3) are also penetrated by punching limit screws (26) for limiting the vertical 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), and the bottom end of the punching limit screw (26) is provided with a limit block (27).

4. The electric three-hole punching and threading binding machine according to claim 1, characterized in that: The perforating hollow drill (32) is provided with a paper scrap discharge device (33), one side of the paper scrap discharge device (33) is provided with a chip discharge reed pipe (34), the other end of the chip discharge reed pipe (34) is connected to a paper receiving box (10), and the paper receiving box (10) is fixed to the lower part of the perforated carrier plate (3).

Images