CN110193861B

CN110193861B - Punching device for binding files

Info

Publication number: CN110193861B
Application number: CN201910386096.2A
Authority: CN
Inventors: 邓敬婧; 张靖唯; 王宏平
Original assignee: Individual
Current assignee: Deng Jingjing
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2021-07-06
Anticipated expiration: 2039-05-09
Also published as: CN110193861A

Abstract

The invention discloses a punching device for binding files, which comprises a placing plate, a rectangular box, a pressing plate, a driving shaft and a shaft lever, wherein the pressing plate is fixedly arranged at two ends of the front side of the bottom of the rectangular box through a manual telescopic rod, a return spring is fixedly arranged at the bottom of the surface of the shaft lever, and the return spring is positioned at the bottom of the rectangular box. The punching device for binding the files is provided with the paper scrap box, a groove is formed in the position, corresponding to the pressing plate, of the top of the placing plate, the paper scrap box is placed in the groove, when the files are punched, the paper scraps can fall into the paper scrap box, the paper scrap box stores the paper scraps in a unified mode, and the situation that the paper scraps fall everywhere is avoided.

Description

Punching device for binding files

Technical Field

The invention relates to the technical field of file binding, in particular to a punching device for file binding.

Background

At present, the academic world has not unified definition of files, generally, files refer to various forms of original records with storage value directly formed by people in various social activities, the original recordability is the essential attribute of the files, the ancient files in China have different names in various dynasties, the trade name is 'book', the times of the generations are 'middle', the Qinhuan is 'book' and the future called 'document', 'file case', 'file book', 'book' and the multipurpose 'files' after the Qing dynasty, the files are unified and called 'files', when the records are too many, people need to bind some recorded files into a book for storage, and when the files are bound, people need to use a punching device to punch the files and then bind the files.

Present archives are bound and are being used perforating device when punching archives, archives can appear removing, lead to punching the position deviation appearing, lead to archives to bind neatly inadequately, the effect is bound in the influence, present archives are bound and are being used perforating device when punching archives, the punching head all need artifical manual pull out the punching head after having punched the hole at every turn, it is convenient inadequately to use, present archives are bound and are being used with perforating device, some wastepapers can appear, it is everywhere to waft, it is more troublesome to clear up.

In addition, the preset position previewing of punching and the burr removal of paper after punching can not be realized in the existing paper punching device, and the paper is adhered after the paper is drilled vigorously, so that the punching rod body can not be directly taken out, and the operation is complex.

Disclosure of Invention

The present invention is directed to a punching device for binding files, which solves the above problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a punching device for binding files, which comprises a placing plate, a rectangular box, a pressing plate, a driving shaft and a shaft lever, the two ends of the front side of the bottom of the rectangular box are fixedly provided with a pressing plate through a manual telescopic rod, the bottom of the surface of the shaft lever is fixedly provided with a return spring, the reset spring is positioned at the bottom of the rectangular box, the rectangular box is fixedly arranged at the two ends of the rear side of the top of the placing plate through the mounting rack, a driving shaft is fixedly arranged at the position close to the rear side in the rectangular box, handles are fixedly arranged at the two ends of the driving shaft, three groups of equidistant first through holes are arranged on the front sides of the top and the bottom of the rectangular box, three groups of equidistant shaft levers are fixedly arranged on the rectangular box through the first through holes, the shaft lever contacts with the driving shaft, a connecting plate is fixedly installed between the tops of the shaft lever, a punching head is fixedly installed at the bottom of the shaft lever, and the punching head is located at the bottom of the rectangular box.

Preferably, the rear side of placing the board top is equipped with the recess, and the inside fixed mounting of recess has the wastepaper box, and the both sides fixed mounting of bottom has the holding rod in the wastepaper box.

Preferably, the top of the reset spring is fixedly provided with a first limiting plate, the central position of the top of the first limiting plate is provided with a first threaded hole, the bottom of the reset spring is fixedly provided with a second limiting plate, and the bottom of the second limiting plate is provided with a second through hole.

Preferably, the bottom of the pressing plate is fixedly provided with a rectangular non-slip mat, and the bottom of the rectangular non-slip mat and the top of the pressing plate are provided with three groups of third through holes with equal intervals.

Preferably, manual telescopic link includes flexible mobile jib, spacing bolt, flexible branch and spacing screw, and the bottom fixed mounting on flexible mobile jib surface has two sets of spacing bolts, and the inside fixed mounting of flexible mobile jib has flexible branch, and the surface of flexible branch is equipped with spacing screw.

Preferably, the surface of the shaft lever is provided with a latch, the surface of the shaft lever close to the bottom is provided with a mounting thread, and the bottom of the shaft lever is provided with a second threaded hole.

Preferably, a screwing nut is fixedly mounted at the top of the punching head, and a threaded head is fixedly mounted at the top of the screwing nut.

Preferably, the surface of the driving shaft is provided with a gear, and the two ends of the driving shaft are fixedly provided with mounting rods through couplers.

Preferably, the rubber sleeve is sleeved at the handheld part of the handle, and the surface of the rubber sleeve is provided with anti-skid grains.

Preferably, four corners of the bottom of the placing plate are fixedly provided with fixed supports, and the bottom of each fixed support is fixedly provided with a round non-slip mat.

Compared with the prior art, the invention has the beneficial effects that: 1. the punching device for binding the files is provided with the pressing plate, when the files are placed at the top of the placing plate, the height of the pressing plate is adjusted through the manual telescopic rod, the pressing plate is pressed on the files to fix the files, the situation that the punching position deviates due to the fact that the files move when the files are punched is avoided, and therefore the binding effect of the files is influenced, the punching device for binding the files is provided with the reset spring, the files are punched through pressing down of the punching head, the reset spring can be in a compression state, after the punching is completed, the reset spring can automatically eject the punching head out of the files, so that the punching head can automatically return to the original position, the punching is convenient to continue to punch next time, the convenience of the punching device for binding the files is greatly improved, the punching device for binding the files is provided with the paper scrap box, a groove is formed in the position, corresponding to the pressing plate, at the top of the, inside the wastepaper box can fall into to the wastepaper, the wastepaper box unified the storage to the wastepaper, avoided the wastepaper to waft everywhere all be. 2. The paper punching position preview and the anti-adhesion design are realized by means of a movable magnetic ring body.

Drawings

FIG. 1 is a schematic plan view of the present invention;

FIG. 2 is a perspective view of the drive shaft of the present invention within a rectangular box;

FIG. 3 is a schematic drawing of a flat cut-away view of the interior of a rectangular box of the present invention;

FIG. 4 is a bottom schematic view of a rectangular box of the present invention;

FIG. 5 is a view of the drive shaft and shaft position of the present invention;

FIG. 6 is a top view of the placement board of the present invention;

FIG. 7 is a view of the return spring structure of the present invention;

FIG. 8 is a side view of the platen of the present invention;

FIG. 9 is a structural view of the hand operated telescopic rod of the present invention;

FIG. 10 is a shaft construction of the present invention;

FIG. 11 is a block diagram of the punch head of the present invention;

fig. 12 is a structural view of a drive shaft of the present invention.

In the figure: 1. placing the plate; 101. a groove; 102. a paper scrap box; 103. a holding rod; 2. a mounting frame; 3. A rectangular box; 4. a manual telescopic rod; 401. a telescopic main rod; 402. a limit bolt; 403. a telescopic strut; 404. a limiting screw hole; 5. pressing a plate; 501. a rectangular non-slip mat; 502. a third through hole; 6. a punching head; 601. screwing the nut; 602. a screw head; 7. a drive shaft; 701. a gear; 702. a coupling; 703. Mounting a rod; 8. a first through hole; 9. a handle; 10. a shaft lever; 1001. clamping teeth; 1002. installing threads; 1003. a second threaded hole; 11. a connecting plate; 12. a return spring; 1201. a first limit plate; 1202. A first threaded hole; 1203. a second limiting plate; 1204. a second through hole; 13. a rubber sleeve; 14. anti-skid lines; 15. a fixed support; 16. a round non-slip mat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment: referring to fig. 1-12, an embodiment of the present invention is shown: a punching device for binding files comprises a placing plate 1, a rectangular box 3, a pressing plate 5, a driving shaft 7 and a shaft rod 10, wherein the rectangular box 3 is fixedly arranged at two ends of the rear side of the top of the placing plate 1 through an installing frame 2, the bottom of the installing frame 2 is fixedly connected with the placing plate 1 through bolts, the top end of the installing frame 2 is fixedly connected with the rectangular box 3 through bolts, the pressing plate 5 is fixedly arranged at two ends of the front side of the bottom of the rectangular box 3 through a manual telescopic rod 4, when files are placed on the top of the placing plate 1, the pressing plate 5 is adjusted through the manual telescopic rod 4 to enable the pressing plate 5 to be pressed on the top of the files, the pressing plate 5 fixes the files, the driving shaft 7 is fixedly arranged at the position close to the rear side inside the rectangular box 3 through a bearing, handles 9 are welded at two ends of the driving shaft 7, the driving shaft, three groups of equidistant first through holes 8 are arranged on the front sides of the top and the bottom of the rectangular box 3, three groups of equidistant shaft levers 10 are inserted into the rectangular box 3 through the first through holes 8, the shaft levers 10 are contacted with a driving shaft 7, the shaft levers 10 drive the punching heads 6 to move downwards, connecting plates 11 are welded between the tops of the shaft levers 10, the three groups of shaft levers 10 are fixedly connected through the connecting plates 11 to ensure the synchronism and the stability of the shaft levers 10, reset springs 12 are fixedly arranged at the bottoms of the surfaces of the shaft levers 10 through thread structures, the reset springs 12 are positioned at the bottoms of the rectangular box 3, when the punching heads 6 move downwards to punch files through the pressing plates 5, the bottoms of the reset springs 12 are pressed against the tops of the pressing plates 5 to be in a compression state, after the punching heads 6 punch holes on the files, the reset springs 12 are unfolded to drive the punching heads 6 to be separated from the files, the positions before punching are automatically returned to, the punching head 6 is positioned at the bottom of the rectangular box 3, and the punching head 6 punches the files.

Further, the rear side of placing board 1 top is equipped with recess 101, and wastepaper box 102 has been placed to the inside of recess 101, and the head of punching a hole 6 can produce many wastepapers when punching archives, and the wastepaper falls into wastepaper box 102 inside, and wastepaper box 102 is unified to the wastepaper and is deposited, and there is a holding rod 103 in wastepaper box 102 both sides of bottom through bolt fixed mounting, is convenient for take out the inside wastepaper box 102 of recess 101 through holding rod 103.

Further, a first limiting plate 1201 is welded to the top of the return spring 12, a first threaded hole 1202 is formed in the central position of the top of the first limiting plate 1201, the first limiting plate 1201 is fixedly installed at the bottom of the surface of the shaft rod 10 through the first threaded hole 1202, a second limiting plate 1203 is welded to the bottom of the return spring 12, a second through hole 1204 is formed in the bottom of the second limiting plate 1203, when the punching head 6 punches the archive, the punching head 6 moves downwards through the second through hole 1204, and the second limiting plate 1203 is opened at the top of the pressing plate 5.

Further, the bottom of clamp plate 5 is pasted rectangle slipmat 501, and rectangle slipmat 501 increases the frictional force between clamp plate 5 and the baffle, prevents that clamp plate 5 from when fixed to archives, and the archives appear sliding, and rectangle slipmat 501's bottom and clamp plate 5's top are equipped with the third through-hole 502 of three equidistance of group, and third through-hole 502 is convenient for punch head 6 and punches through archives.

Further, manual telescopic link 4 includes flexible mobile jib 401, limit bolt 402, telescopic branch 403 and spacing screw 404, there are two sets of limit bolt 402 in the bottom on flexible mobile jib 401 surface through helicitic texture fixed mounting, telescopic branch 403 has been inserted to the inside of flexible mobile jib 401, telescopic branch 403's surface is equipped with spacing screw 404, the length of manual telescopic link 4 is adjusted to the telescopic branch 403 of the inside flexible mobile jib 401 of pull, make clamp plate 5 remove down and push down archives, then fix telescopic branch 403 inside screwing in limit screw 404 to limiting bolt 402, thereby reach clamp plate 5 and carry out the purpose fixed to archives.

Further, the surface of axostylus axostyle 10 is equipped with latch 1001, and latch 1001 cooperates gear 701 to work, and the position department that the bottom is close to on the surface of axostylus axostyle 10 is equipped with mounting thread 1002, and first limiting plate 1201 is fixed on axostylus axostyle 10 through mounting thread 1002, and the bottom of axostylus axostyle 10 is equipped with second screw hole 1003, and the fixed connection of thread head 602 is convenient for to second screw hole 1003.

Further, a screwing nut 601 is welded on the top of the punching head 6, a threaded head 602 is welded on the top of the screwing nut 601, and the punching head 6 is conveniently rotated by screwing the nut 601, so that the threaded head 602 is screwed into the second threaded hole 1003, and the punching head 6 is fixed on the bottom of the shaft rod 10.

Further, the surface of drive shaft 7 is equipped with gear 701, and when drive shaft 7 rotated, gear 701 blocked latch 1001 to drive axostylus axostyle 10 and reciprocate, the both ends of drive shaft 7 had installation pole 703 through shaft coupling 702 fixed mounting, and installation pole 703 passes through bearing and rectangle box 3 fixed connection, and installation pole 703 extends the outside of rectangle box 3, installation pole 703 and the both ends fixed connection of handle 9.

Further, the rubber sleeve 13 is sleeved at the handheld position of the handle 9, the rubber sleeve 13 plays a role in protecting the palm, bubbles are prevented from being ground when the palm rotates the handle 9, the anti-slip lines 14 are arranged on the surface of the rubber sleeve 13, and the anti-slip lines 14 prevent people from slipping when the user holds the rubber sleeve 13 to rotate the handle 9.

Further, four angles of placing board 1 bottom have fixing support 15 through bolt fixed mounting, and fixing support 15 carries out the fixed stay to placing board 1, and fixing support 15's bottom bonds and has circular slipmat 16, and circular slipmat 16 increases fixing support 15's frictional force, prevents that fixing support 15 from appearing moving at the in-process that supports.

The working principle is as follows: when the device is used, firstly, the archives are placed at the top of the placing plate 1, then the height of the pressing plate 5 is adjusted through the manual telescopic rod 4, the archives are pressed by the pressing plate 5, the archives are fixed, then the handle 9 is held to rotate, the shaft rod 10 is driven to move downwards, the punching head 6 moves downwards along with the shaft rod 10, in the process of moving downwards of the punching head 6, the second limiting plate 1203 is clamped at the top of the pressing plate 5, then the punching head 6 continues to move downwards through the third through hole 502 to punch the archives, in the process, the reset spring 12 is in a compression state, after the punching head 6 punches a hole in the archives, the handle 9 is loosened, the reset spring 12 extends to drive the punching head 6 to move upwards to separate the archives, then the paper scrap box 102 is taken out of the groove 101 through the holding rod 103, and then the paper scraps in the paper scrap box 102 are poured into.

Second embodiment: a punching device for file binding comprises a placing plate 1, a rectangular box 3, a pressing plate 5, a driving shaft 7 and shaft levers 10, wherein the pressing plate 5 is fixedly installed at two ends of the front side of the bottom of the rectangular box 3 through manual telescopic rods 4, a return spring 12 is fixedly installed at the bottom of the surface of the shaft lever 10, the return spring 12 is located at the bottom of the rectangular box 3, the rectangular box 3 is fixedly installed at two ends of the rear side of the top of the placing plate 1 through an installation frame 2, the driving shaft 7 is fixedly installed at a position, close to the rear side, inside the rectangular box 3, the two ends of the driving shaft 7 are fixedly provided with handles 9, three groups of equidistant first through holes 8 are arranged at the front sides of the top and the bottom of the rectangular box 3, three groups of equidistant shaft levers 10 are fixedly installed on the rectangular box 3 through the first through holes 8, the shaft levers 10 are in contact with the driving shaft 7, and a magnetic ring body capable of, a connecting plate 11 is attached to the top of each shaft lever 10, a second magnetic block is embedded in the connecting plate 11, a punching head 6 is fixedly mounted at the bottom of each shaft lever 10, the punching head 6 is positioned at the bottom of the rectangular box 3, and the punching head 6 consists of a rod body and a conical head;

a first limiting plate 1201 is fixedly mounted at the top of the reset spring 12, a first threaded hole 1202 is formed in the center of the top of the first limiting plate 1201, a second limiting plate 1203 is fixedly mounted at the bottom of the reset spring 12, a second through hole 1204 is formed in the bottom of the second limiting plate 1203, a rectangular non-slip mat 501 is fixedly mounted at the bottom of the pressing plate 5, three groups of equidistant third through holes 502 are formed in the bottom of the rectangular non-slip mat 501 and the top of the pressing plate 5, the manual telescopic rod 4 comprises a telescopic main rod 401, a limiting bolt 402, a telescopic strut 403 and a limiting threaded hole 404, two groups of limiting bolts 402 are fixedly mounted at the bottom of the surface of the telescopic main rod 401, the telescopic strut 403 is fixedly mounted inside the telescopic main rod 401, and the limiting threaded hole 404 is formed;

the top of the box body of the rectangular box 3 is made of magnetic conductive materials, the depth of the third through hole 502 is smaller than the length of the conical head of the punching head 6, and the length of the conical head is the vertical height of the conical tip and the conical bottom surface.

The working process of the embodiment is as follows: firstly, the magnetic ring body slides upwards on the shaft lever 10 until being magnetically adsorbed with the connecting plate 11, then the handle 9 is held to rotate, the shaft lever 10 is driven to move downwards until the conical head of the punching head 6 penetrates through the third through hole 502 on the pressing plate 5 and slightly extrudes paper, so that an indentation is reserved on the paper, then the magnetic ring body slides downwards on the shaft lever 10 until being separated from the connecting plate 11 and adsorbed on the lever body, at the moment, the handle 9 is rotated reversely, so that the conical head of the punching head 6 upwards penetrates through the third through hole 502 on the pressing plate 5, a user can intuitively preview the punching position of the paper, secondary adjustment of the position of the paper is carried out according to requirements, after the fixed position of the paper is adjusted, the magnetic ring body slides upwards on the shaft lever 10 until being magnetically adsorbed with the connecting plate 11, then the handle 9 is held to rotate, the shaft lever 10 is driven to move downwards, and the paper is punched, after the punching on the paper is finished, the magnetic ring body slides downwards on the shaft lever 10 until the magnetic ring body is magnetically adsorbed with the top of the rectangular box 3, at the moment, the compression force of the reset spring 12 is counteracted by the adsorption force of the magnetic ring body and the top of the rectangular box 3, the whole punching head 6 is clamped and is static, the handle 9 is loosened, at the moment, the magnetic adsorption force lost between the connecting plate 11 and the top of the shaft lever 10 is only simply attached, at the moment, the connecting plate 11 is taken down and the shaft lever 10 body is manually rotated in sequence to enable the connecting plate to rotate in the third through hole 502, the first through hole 8 and the hole of the paper, so that the paper can be removed from adhesion, the friction force between the paper and the rod body is reduced, at last, the handle 9 is held by hands, the magnetic ring body slides upwards on the shaft lever 10 to be close to the top of the rod body, at the moment, the connecting plate, the reset spring 12 is extended to drive the punching head 6 to move upwards to separate from the file, then the paper scrap box 102 is taken out from the inside of the groove 101 through the holding rod 103, and then the paper scrap in the paper scrap box 102 is poured into the garbage can.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a perforating device is used in archives binding, is including placing board (1), rectangle box (3), clamp plate (5), drive shaft (7) and axostylus axostyle (10), its characterized in that: the magnetic bearing is characterized in that pressing plates (5) are fixedly mounted at two ends of the front side of the bottom of the rectangular box (3) through manual telescopic rods (4), a reset spring (12) is fixedly mounted at the bottom of the surface of the shaft rod (10), the reset spring (12) is located at the bottom of the rectangular box (3), the rectangular box (3) is fixedly mounted at two ends of the rear side of the top of the placing plate (1) through a mounting frame (2), a driving shaft (7) is fixedly mounted at a position close to the rear side in the rectangular box (3), handles (9) are fixedly mounted at two ends of the driving shaft (7), three groups of equidistant first through holes (8) are formed in the front sides of the top and the bottom of the rectangular box (3), three groups of equidistant shaft rods (10) are fixedly mounted on the rectangular box (3) through the first through holes (8), the shaft rods (10) are in contact with the driving shaft (7), and a magnet capable of sliding along the shaft rods (10) is sleeved on, a connecting plate (11) is attached to the top of each shaft lever (10), a second magnetic block is embedded in the connecting plate (11), a punching head (6) is fixedly mounted at the bottom of each shaft lever (10), the punching head (6) is positioned at the bottom of the rectangular box (3), and the punching head (6) consists of a rod body and a conical head;

a first limit plate (1201) is fixedly arranged at the top of the return spring (12), a first threaded hole (1202) is formed in the center of the top of the first limit plate (1201), a second limit plate (1203) is fixedly arranged at the bottom of the return spring (12), a second through hole (1204) is formed in the bottom of the second limit plate (1203), a rectangular non-slip mat (501) is fixedly arranged at the bottom of the pressing plate (5), three groups of third through holes (502) with equal distance are arranged at the bottom of the rectangular non-slip mat (501) and the top of the pressing plate (5), the manual telescopic rod (4) comprises a telescopic main rod (401), limiting bolts (402), telescopic struts (403) and limiting screw holes (404), wherein two groups of limiting bolts (402) are fixedly installed at the bottom of the surface of the telescopic main rod (401), the telescopic struts (403) are fixedly installed inside the telescopic main rod (401), and the limiting screw holes (404) are formed in the surface of the telescopic struts (403);

the top of the box body of the rectangular box (3) is made of magnetic materials, the depth of the third through hole (502) is smaller than the length of the conical head of the punching head (6), and the length of the conical head is the vertical height of the conical tip and the conical bottom surface.

2. The punching device for binding files according to claim 1, wherein: the rear side of the top of the placing plate (1) is provided with a groove (101), a wastepaper box (102) is fixedly installed in the groove (101), and holding rods (103) are fixedly installed on two sides of the bottom in the wastepaper box (102).

3. The punching device for binding files according to claim 1, wherein: the surface of the shaft lever (10) is provided with a latch (1001), the surface of the shaft lever (10) is provided with a mounting thread (1002) at a position close to the bottom, and the bottom of the shaft lever (10) is provided with a second threaded hole (1003).

4. The punching device for binding files according to claim 1, wherein: the top of the punching head (6) is fixedly provided with a screwing nut (601), and the top of the screwing nut (601) is fixedly provided with a thread head (602).

5. The punching device for binding files according to claim 1, wherein: the surface of drive shaft (7) is equipped with gear (701), the both ends of drive shaft (7) are through shaft coupling (702) fixed mounting have installation pole (703).

6. The punching device for binding files according to claim 1, wherein: the rubber sleeve (13) is sleeved at the handheld part of the handle (9), and anti-skid grains (14) are arranged on the surface of the rubber sleeve (13).

7. The punching device for binding files according to claim 1, wherein: four corners of the bottom of the placing plate (1) are fixedly provided with fixed supports (15), and the bottom of each fixed support (15) is fixedly provided with a round non-slip mat (16).