CN213226502U

CN213226502U - Book edge cutting device with waste recovery structure

Info

Publication number: CN213226502U
Application number: CN202022129117.3U
Authority: CN
Inventors: 刘厚国
Original assignee: Nanjing Sunchi Color Printing Co ltd
Current assignee: Nanjing Sunchi Color Printing Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-05-18
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a books side cut device with waste recycling structure relates to the field of books printing, include the base and establish the operation panel that is used for placing books on the base, the through-hole that supplies book limit waste material to pass through is all seted up at the three edge that books were treated to cut at the operation panel, lie in the operation panel below on the base and seted up the cavity, be equipped with the recovery mechanism that is used for placing book limit waste material in the cavity, be equipped with the mechanism that cuts that compresses tightly and cut books on the base. This application has the possibility that reduces the book limit waste material and drops to hiding the clearance for the convenient effect of book limit waste material clearance.

Description

Book edge cutting device with waste recovery structure

Technical Field

The application relates to the field of books printing, especially, relate to a books side cut device with waste recovery structure.

Background

The production process of books generally consists of the following steps: typesetting, cutting paper, printing, binding into a book, and the like. The printed sheets that are initially cut are typically larger than the final finished sheets to avoid the entire book falling into rejects due to sheet edge breakage during subsequent processing. Thus requiring cutting of the excess portion of the book edge after binding.

The utility model discloses a chinese utility model patent that publication number is CN207327084U discloses a books bead cutter, including the operation panel, set up conveyer on the operation panel, erect the cutter unit of conveyer one side and the drive arrangement who is connected with the cutter unit, drive arrangement includes driving motor and the connecting rod drive who links to each other with driving motor's output, and the cutter unit is including the slide that can follow perpendicular to conveyer's direction of transfer round trip movement, the level is provided with the tool bit on the slide, and driving motor's output passes through the connecting rod drive and links to each other with the slide of cutter unit.

In view of the above-mentioned related art, the inventor believes that in the actual processing process, the waste left after the book is trimmed is scattered near the edge trimmer and even falls in the concealed gap of the machine, and the defect that the waste is difficult to clean exists.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem of waste material clearance difficulty when books are cut edge, this application provides a books side cut device with waste recycling structure.

The application provides a books side cut device with waste recovery structure adopts following technical scheme:

the utility model provides a books side cut device with waste recycling structure, includes the base and establishes the operation panel that is used for placing books on the base, the through-hole that supplies book limit waste material to pass through is all seted up at the three edge that the operation panel waited to cut at books, it has seted up the cavity to lie in the operation panel below on the base, be equipped with the recovery mechanism that is used for placing book limit waste material in the cavity, be equipped with the mechanism that cuts that compresses tightly and cut books on the base.

Through adopting above-mentioned technical scheme, when books cut the edge, cut the books that the mechanism will push to on the operation panel and compress tightly the back and cut, the book limit that cuts drops to inside retrieving the mechanism from the through-hole department, and the book limit waste material of retrieving can carry out centralized processing, has reduced the book limit waste material and has dropped to the possibility in hiding the clearance for book limit waste material clearance is convenient.

Optionally, retrieve the mechanism and include waste bin, dead lever and axis of rotation, the dead lever sets firmly on the base, the waste bin rotates with the dead lever and is connected, axis of rotation and the coaxial setting of dead lever, and axis of rotation and dead lever relative distribution are on the lateral wall of base, be equipped with servo motor on the base, servo motor's output shaft and axis of rotation fixed connection, servo motor's one end and waste bin fixed connection are kept away from to the axis of rotation.

Through adopting above-mentioned technical scheme, book limit of cutting out drops in the waste bin, when needing to clear up the waste bin, the operator can push away outside shallow with the base butt, servo motor starts, the drive axis of rotation rotates, the axis of rotation drives the waste bin and rotates, it is inside to be greater than 90 degrees and the opening orientation shallow of waste bin until the waste bin upset, the inside books waste material of waste bin landing to the shallow under the drive of self gravity this moment, then drive servo motor reversal, make the waste bin reset, thereby the transfer of waste material has been realized, and is simple in operation.

Optionally, the recycling mechanism further comprises a temporary storage box, a cross rod is arranged on the base along the direction parallel to the axis of the rotating shaft, the cross rod is rotatably connected with the base, one end of the temporary storage box is fixed on the cross rod, an opening is formed in one end, far away from the cross rod, of the temporary storage box, the temporary storage box is located above the waste bucket, and a driving assembly for driving the cross rod to rotate is arranged on the base.

By adopting the technical scheme, the temporary storage box is obliquely arranged on the waste barrel downwards during processing, so that the falling waste book edge is blocked, and the possibility that the waste falls out of the waste barrel is reduced; when the book edge in the waste barrel needs to be dumped, the driving assembly is started to drive the cross rod to rotate, the cross rod drives the temporary storage box to rotate to the horizontal position, and then the waste barrel is dumped, so that the waste is treated under the condition that the whole processing production line is not stopped; empty the waste bucket after accomplishing and reset, start drive assembly once more and reset the case of keeping in, the waste material of keeping in the case simultaneously slips to the waste bucket under self action of gravity in, simple structure, convenient operation.

Optionally, the driving assembly comprises a worm wheel and a worm meshed with the worm wheel, a support is arranged on the side wall of the base, the worm is rotatably connected to the support, the worm wheel is fixedly connected with the cross rod in a coaxial mode, and a knob is arranged at one end, away from the worm wheel, of the worm.

Through adopting above-mentioned technical scheme, manual rotation knob, the drive worm rotates, and worm drive worm wheel rotates, and the worm wheel drives the axis of rotation and rotates to realized the rotation of temporary storage case, the worm gear cooperation has the auto-lock ability, makes the temporary storage case can be stable.

Optionally, it includes the support frame to cut the mechanism, be equipped with on the support frame and be used for carrying out the subassembly that compresses tightly that fastens with books, still be equipped with cutting assembly on the support frame, cutting assembly is including driving actuating cylinder, link and tool bit, it establishes on the support frame to drive actuating cylinder, and is located the operation panel directly over, drive actuating cylinder's piston rod and link fixed connection, the link is kept away from the one end and the tool bit fixed connection that drive actuating cylinder.

Through adopting above-mentioned technical scheme, when cutting, compress tightly the subassembly and start to compress tightly books, then drive actuating cylinder and start, drive link moves down, and the tool bit equidirectional removal cuts books completely, drives actuating cylinder at last and drives the tool bit and reset.

Optionally, compress tightly the subassembly including establishing the kickboard on the support frame lateral wall perpendicularly, the kickboard passes from the space of link self, be equipped with no pole cylinder on the support frame, the kickboard is connected with the piston fixed connection of no pole cylinder, the one end that the support frame was kept away from to the kickboard is equipped with the montant perpendicularly, the one end that the kickboard was kept away from to the montant is equipped with the pressure strip, riser and pressure strip all are located inside the link, the pressure strip is located the tool bit inboard.

Through adopting above-mentioned technical scheme, no pole cylinder starts, and the drive sliding plate slides downwards, and the sliding plate moves the montant syntropy and slides, and the montant drives the pressure strip and slides downwards, and until the pressure strip sticiss on books to realized compressing tightly of books, reduced the possibility that books shifted when cutting, improved the precision when books cut.

Optionally, the tool bit is equipped with the guard plate along outward, the recess has been seted up on the guard plate, the recess tank bottom has set firmly a plurality of springs, all the one end that the recess tank bottom was kept away from to the spring is equipped with presses the clamp plate, slide in the recess according to the clamp plate, it is less than the guard plate diapire according to the clamp plate diapire.

Through adopting above-mentioned technical scheme, when cutting, the tool bit at first with the books butt, then the tool bit continues to move down and cuts books, press the clamp plate butt on the books waste material that is cut down after that, the tool bit continues to slide downwards, press the book limit that the clamp plate will be cut down and press down, spring compression simultaneously, the spring of compression promotes downwards and presses the clamp plate, and then orders about the clamp plate and impels the waste material bucket with the book limit waste material, has reduced the book limit adhesion and has been difficult to the possibility that drops on books.

Optionally, the bottom wall of the operating platform is provided with a closing plate, and when the temporary storage box rotates to a horizontal position, one end of the temporary storage box, which is far away from the cross rod, is abutted against one end of the closing plate, which is far away from the operating platform.

Through adopting above-mentioned technical scheme, when empting the waste material, the case of keeping in rotates to horizontal position, and the waste material bucket upset, and the closing plate is used for sealing the opening of the case of keeping in, has reduced the possibility that the book limit waste material in the case of keeping in dropped from the opening part, then resets the waste material bucket, drives the separation of case of keeping in and closing plate again, and the book limit waste material drops to the waste material bucket in from the opening part in, easy operation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the book is cut by the cutting mechanism, the waste materials are collected by the recovery mechanism, the waste materials are convenient to process subsequently, the possibility that the book edge waste materials fall into hidden gaps is reduced, and the book edge waste materials are convenient to clean;

2. the setting of temporary storage case makes the waste bin need not to stop the production line when empting to whole and the efficiency of course of working has been improved, simple structure.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram for showing a connection relationship between the connection frame and the tool bit in the embodiment of the application.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic structural diagram for showing the positional relationship between the closing plate and the temporary storage box in the embodiment of the present application.

Description of reference numerals: 1. a base; 14. a cavity; 2. an operation table; 21. a through hole; 22. a baffle plate; 23. a closing plate; 3. a cutting mechanism; 31. a support frame; 4. cutting the assembly; 41. a driving cylinder; 42. a connecting frame; 43. a cutter head; 431. a protection plate; 432. a groove; 433. a spring; 434. a pressing plate; 44. a reinforcing plate; 5. a compression assembly; 51. a slide plate; 52. a rodless cylinder; 53. a vertical rod; 54. a compression plate; 55. a guide bar; 6. a recovery mechanism; 61. a waste bin; 62. fixing the rod; 63. a rotating shaft; 64. a servo motor; 65. a temporary storage box; 66. a cross bar; 7. a drive assembly; 71. a worm gear; 72. a worm; 73. a support; 74. a knob.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses books side cut device with waste recovery structure. Referring to fig. 1, books side cut device with waste recovery structure includes base 1 and establishes operation panel 2 on base 1 perpendicularly, vertically seted up three through-hole 21 along on operation panel 2, wherein two through-holes 21 are parallel to each other and all perpendicular to third through-hole 21, three through-hole 21 end to end is integrative, be used for placing the books of treating the shearing between the three through-hole 21, be equipped with on operation panel 2 and compress tightly and cut the mechanism 3 that cuts to books, cavity 14 has been seted up under lieing in operation panel 2 on the base 1, it is equipped with the recovery mechanism 6 that is used for collecting the book limit waste material to lie in cavity 14 on the base 1, recovery mechanism 6 lies in under operation panel 2.

Referring to fig. 1 and 2, the cutting mechanism 3 includes a support frame 31 disposed above the operating table 2, a pressing component 5 for pressing the book is disposed on a side wall of the support frame 31, the pressing component 5 includes a rodless cylinder 52, a sliding plate 51, a plurality of vertical rods 53 and a pressing plate 54, the rodless cylinder 52 is fixedly disposed on an inner side wall of the support frame 31, the sliding plate 51 is vertically disposed on a piston of the rodless cylinder 52, a guide rod 55 is disposed on another inner side wall of the support frame 31, the guide rod 55 is disposed opposite to the rodless cylinder 52, one end of the sliding plate 51, which is far away from the rodless cylinder 52, is connected with the guide rod 55 in a sliding manner, an installation space is saved due to the arrangement of the rodless cylinder 52, and the guide rod 55 has; a plurality of montants 53 all vertical fixation in the bottom of shifting board 51, the one end and the pressure strip 54 vertical fixation that all montants 53 kept away from shifting board 51, cut mechanism 3 still including being used for carrying out the cutting Assembly 4 that cuts with the books after compressing tightly.

Referring to fig. 1 and 2, after a book is pushed to the operating platform 2 from a previous process and is located under the pressing plate 54, the rodless cylinder 52 is started, the piston of the rodless cylinder 52 drives the sliding plate 51 to slide downwards, the sliding plate 51 drives the vertical rod 53 to slide in the same direction, and the vertical rod 53 drives the pressing plate 54 to slide downwards until the pressing plate 54 presses the book, so that the book cannot be easily loosened when being pressed on the operating platform 2.

Referring to fig. 1 and 2, the cutting assembly 4 includes a driving cylinder 41, a connecting frame 42 and a cutter head 43, the driving cylinder 41 is fixedly arranged at the top of the supporting frame 31, a piston rod of the driving cylinder 41 is arranged perpendicular to the top wall of the supporting frame 31, the piston rod of the driving cylinder 41 is fixedly connected with the connecting frame 42, the cutter head 43 is fixedly connected to one end of the connecting frame 42 far away from the driving cylinder 41, the cross section of the cutter head 43 is U-shaped, the pressing plate 54 is enclosed by the cutter head 43, and the cutter head 43 can simultaneously cut three side walls of the book; the sliding plate 51 penetrates through a gap on the connecting frame 42, and the vertical rod 53 and the pressing plate 54 are enclosed by the tool bit 43; after the pressing plate 54 presses the book, the driving cylinder 41 is started, the connecting frame 42 is driven to slide downwards, the connecting frame 42 drives the cutter head 43 to slide downwards, and the cutter head 43 slides to abut against the book and then cuts the book.

Referring to fig. 2 and 3, a protection plate 431 is arranged on the outer wall of the cutter head 43, a groove 432 is formed in the bottom wall of the protection plate 431, a plurality of springs 433 are arrayed at the bottom of the groove 432 along the edge of the cutter head 43, one end of each spring 433, which is far away from the bottom of the groove 432, is fixedly connected with a pressing plate 434, the bottom wall of the pressing plate 434 is wedge-shaped and is lower than the bottom wall of the protection plate 431, and the pressing plate 434 is in inserted fit; when tool bit 43 slides down and cuts books, press the pressing plate 434 diapire and the book limit butt that cuts down, spring 433 compresses, and spring 433 has a decurrent effort to pressing the pressing plate 434 simultaneously, and wedge-shaped pressing plate 434 pushes down the book limit for the book limit waste material drops smoothly to waste bin 61 in, has reduced the book limit waste material because of cutting the possibility on the incomplete book of adhesion.

Referring to fig. 1 and 2, each vertical rod 53 is fixedly connected with a reinforcing plate 44, each reinforcing plate 44 is connected with the connecting frame 42 in a sliding manner, and the reinforcing plates 44 reinforce the structural stability of the pressing plate 54 and the cutter head 43, so that the pressing plate 54 is always located in the center of the inside of the cutter head 43, the stability of the vertical rod 53 in the vertical sliding manner is improved, and the book edge cutting precision is increased.

Referring to fig. 4, the recycling mechanism 6 includes a temporary storage box 65 fixed on the base 1 and a waste bucket 61 disposed right below the temporary storage box 65, the temporary storage box 65 is located between the waste bucket 61 and the console 2, and the temporary storage box 65 and the waste bucket 61 are both located in the cavity 14 on the base 1; the base 1 is connected with a cross rod 66 in a rotating mode, the cross rod 66 is fixedly connected with the temporary storage box 65, an opening is formed in one end, away from the cross rod 66, of the temporary storage box 65, the closing plate 23 is arranged at the bottom of the operating platform 2 relative to the temporary storage box 65, the closing plate 23 is arranged in an inclined mode, when the temporary storage box 65 is driven by the cross rod 66 to rotate to the horizontal position, one end, away from the cross rod 66, of the temporary storage box 65 is abutted to the closing plate 23, and therefore the opening in the temporary storage box 65 is closed.

Referring to fig. 1 and 4, the bottom wall of the operating platform 2 is provided with two baffles 22 below two parallel through holes 21, the two baffles 22 are distributed on two sides of the closing plate 23, the two baffles 22 are obliquely arranged, and the baffles 22 limit the book edge waste falling from the through holes 21, so that the book edge waste is accurately recovered by the waste barrel 61; the base 1 is provided with a driving component 7 for driving the cross rod 66 to rotate.

Referring to fig. 4, the driving assembly 7 includes a worm wheel 71, a worm 72 and a support 73, the worm wheel 71 is fixedly connected with one end of the cross bar 66, the worm wheel 71 is meshed with the worm 72, one end of the worm 72, which is far away from the worm wheel 71, is provided with a knob 74, the worm 72 is fixedly connected with the support 73, and the support 73 is fixedly arranged on the base 1; the knob 74 is rotated manually, the worm 72 is driven to rotate, the worm 72 drives the worm wheel 71 to rotate, the worm wheel 71 drives the cross rod 66 to rotate, the cross rod 66 drives the temporary storage box 65 to rotate, until the temporary storage box 65 rotates to abut against the sealing plate 23, the waste materials at the edge of a book drop into the temporary storage box 65 at the moment, the waste material barrel 61 can be cleaned, the waste material barrel 61 is cleaned completely, the temporary storage box 65 is reset by rotating the knob 74, the waste materials at the edge of a book in the temporary storage box 65 slide into the waste material barrel 61, the waste materials are cleaned under the condition that a production line is not stopped, and the cleaning machine is simple and convenient.

Referring to fig. 2, both sides that lie in waste bin 61 on base 1 are equipped with dead lever 62 and axis of rotation 63 respectively, dead lever 62 and the coaxial setting of axis of rotation 63, dead lever 62 one end and base 1 fixed connection, the other end rotates with waste bin 61 to be connected, axis of rotation 63 passes a base 1 lateral wall perpendicularly and rotates with base 1 to be connected, the both ends of axis of rotation 63 all stretch out from the both sides of base 1 lateral wall, axis of rotation 63 is towards the one end and the waste bin 61 fixed connection of dead lever 62, still be fixed with servo motor 64 on the base 1, servo motor 64's motor shaft and the one end fixed connection that axis of rotation 63 deviates from dead lever 62.

Referring to fig. 2, when empting the waste material, the operator can with outside shallow to with base 1 lateral wall butt, servo motor 64 starts, drive axis of rotation 63 rotates, axis of rotation 63 drives waste bucket 61 and rotates, it is downward until the opening upset of waste bucket 61 to the slope, the opening of waste bucket 61 is inside the shallow this moment, the book limit waste material in waste bucket 61 slides down to the shallow inside under self action of gravity simultaneously, finish, push away the shallow from base 1, servo motor 64 reverses, order about waste bucket 61 and reset, moreover, the steam generator is simple in structure, and convenient for operation.

The implementation principle of books side cut device with waste recovery structure of the embodiment of this application is: after the book is pushed to the operating platform 2 from the previous process and is positioned under the pressing plate 54, the rodless cylinder 52 is started to drive the sliding plate 51 to slide downwards, the sliding plate 51 drives the vertical rod 53 to slide downwards, and the vertical rod 53 drives the pressing plate 54 to slide downwards until the pressing plate 54 fastens the book; at this moment, the driving cylinder 41 is started, the driving connecting frame 42 slides downwards, the connecting frame 42 drives the cutter head 43 to slide downwards, the cutter head 43 cuts books, and the cut book edge waste materials enter the waste barrel 61.

When the full waste bucket 61 needs to be cleaned, firstly, an operator manually rotates the knob 74 to drive the worm 72 to rotate, the worm 72 drives the worm wheel 71 to rotate, and the worm wheel 71, the cross bar 66 and the temporary storage box 65 rotate in the same direction until the temporary storage box 65 rotates to abut against the closing plate 23; then the operator pushes away the shallow with base 1 lateral wall butt, servo motor 64 starts, the opening upset of drive waste bin 61 is to the slope downwards, the opening of waste bin 61 is inside towards the shallow this moment, the book limit waste material is inside landing to the shallow simultaneously, the processing finishes, the operator pushes away the shallow from base 1, servo motor 64 reverses, order about waste bin 61 and reset, rotate knob 74 this moment, order about to keep in case 65 and reset, the book limit waste material in keeping in case 65 is emptyd to waste bin 61 in, waste bin 61's setting has reduced the possibility that the book limit waste material drops to hiding the clearance, the waste material of collection can carry out centralized processing, safety ring protects.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a books side cut device with waste recovery structure which characterized in that: including base (1) and establish operation panel (2) that are used for placing books on base (1), through-hole (21) that supply book limit waste material to pass through are all seted up at three edge that operation panel (2) treat to cut at books, lie in operation panel (2) below on base (1) and seted up cavity (14), be equipped with recovery mechanism (6) that are used for placing book limit waste material in cavity (14), be equipped with on base (1) and compress tightly and cut mechanism (3) that cuts that cut that cuts to books.

2. The book edge trimming apparatus with scrap recycling structure in accordance with claim 1 wherein: retrieve mechanism (6) and include waste bin (61), dead lever (62) and axis of rotation (63), dead lever (62) set firmly on base (1), waste bin (61) rotate with dead lever (62) and are connected, axis of rotation (63) and dead lever (62) coaxial setting, just axis of rotation (63) and dead lever (62) relative distribution are on the lateral wall of base (1), be equipped with servo motor (64) on base (1), the output shaft and axis of rotation (63) fixed connection of servo motor (64), servo motor (64) was kept away from in axis of rotation (63) one end and waste bin (61) fixed connection.

3. The book edge trimming apparatus with scrap recycling structure in accordance with claim 2 wherein: retrieve mechanism (6) and still include temporary storage case (65), be equipped with horizontal pole (66) along being on a parallel with axis of rotation (63) axis direction on base (1), horizontal pole (66) rotate with base (1) and be connected, temporary storage case (65) one end is fixed on horizontal pole (66), the opening has been seted up to the one end of keeping away from horizontal pole (66) on temporary storage case (65), temporary storage case (65) are located waste bucket (61) top, be equipped with drive horizontal pole (66) pivoted drive assembly (7) on base (1).

4. The book edge trimming apparatus with scrap recycling structure in accordance with claim 3 wherein: drive assembly (7) include worm wheel (71) and worm (72) with worm wheel (71) meshing, be equipped with on base (1) lateral wall support (73), worm (72) rotate to be connected on support (73), worm wheel (71) and horizontal pole (66) coaxial fixed connection, the one end that worm wheel (71) were kept away from in worm (72) is equipped with knob (74).

5. The book edge trimming apparatus with scrap recycling structure in accordance with claim 1 wherein: cutting mechanism (3) including support frame (31), be equipped with on support frame (31) and be used for carrying out the subassembly (5) that compresses tightly that fastens with books, still be equipped with cutting assembly (4) on support frame (31), cutting assembly (4) are including driving actuating cylinder (41), link (42) and tool bit (43), it establishes on support frame (31) to drive actuating cylinder (41), and is located operation panel (2) directly over, drive the piston rod and link (42) fixed connection of actuating cylinder (41), link (42) are kept away from the one end and the tool bit (43) fixed connection that drive actuating cylinder (41).

6. The book edge trimming apparatus with scrap recycling structure in accordance with claim 5 wherein: compress tightly subassembly (5) and pass from link (42) self space including establishing slide plate (51) on support frame (31) lateral wall perpendicularly, be equipped with rodless cylinder (52) on support frame (31), slide plate (51) and the piston fixed connection of rodless cylinder (52), the one end that support frame (31) were kept away from in slide plate (51) is equipped with montant (53) perpendicularly, the one end that slide plate (51) were kept away from in montant (53) is equipped with pressure strip (54), montant (53) and pressure strip (54) all are located link (42) inside, pressure strip (54) are located tool bit (43) inboard.

7. The book edge trimming apparatus with scrap recycling structure in accordance with claim 5 wherein: tool bit (43) outer edge is equipped with guard plate (431), recess (432) have been seted up on guard plate (431), a plurality of springs (433) have set firmly at recess (432) tank bottom, all the one end that recess (432) tank bottom was kept away from in spring (433) is equipped with presses clamp plate (434), it slides in recess (432) to press clamp plate (434), it is less than guard plate (431) diapire to press clamp plate (434) diapire.

8. The book edge trimming apparatus with scrap recycling structure in accordance with claim 3 wherein: the bottom wall of the operating platform (2) is provided with a closing plate (23), and when the temporary storage box (65) rotates to a horizontal position, one end of the temporary storage box (65), which is far away from the cross rod (66), is abutted against one end of the closing plate (23), which is far away from the operating platform (2).