CN112339340A

CN112339340A - Sealing and edge folding device for corrugated carton processing

Info

Publication number: CN112339340A
Application number: CN202011217306.4A
Authority: CN
Inventors: 匡雪萍
Original assignee: Guangdong Zehe Environmental Protection Technology Co ltd
Current assignee: Guangdong Zehe Environmental Protection Technology Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-02-09

Abstract

This invention discloses a sealing and folding device for corrugated cardboard box processing, comprising a bottom plate, a top plate, and two vertical plates fixedly connected between the bottom plate and the top plate at a front-to-back position. A conveyor belt is horizontally arranged between the two vertical plates, and multiple sets of evenly spaced limiting blocks are fixedly connected to the conveyor belt. Each set of limiting blocks consists of two blocks spaced apart. A first lifting block is movably inserted into the top plate above one set of limiting blocks. A folding plate is fixedly connected to the lower end of the first lifting block, and four rectangularly distributed vertical rods are vertically fixedly connected to the outer side of the lower end of the folding plate. Folding rollers are rotatably connected to the lower ends of the four vertical rods. The advantages are: the sealing, folding, and shaping work are performed simultaneously by a single drive motor, saving costs. The corrugated cardboard box structure produced is stable, preventing tape detachment and incomplete folding.

Description

Sealing and edge folding device for corrugated carton processing

Technical Field

The invention relates to the technical field of carton processing, in particular to a sealing and edge folding device for processing corrugated cartons.

Background

The paper box is a most widely applied packaging product, and comprises a corrugated paper box, a single-layer paper box and the like according to different materials, the paper box has various specifications and models, the paper box is commonly used for three layers and five layers, seven layers are less in use, each layer is divided into inner paper, corrugated paper, core paper and face paper, the inner paper and the face paper comprise tea board paper and kraft paper, the corrugated paper for the core paper is different in color and hand feeling of various kinds of paper, the paper (color and hand feeling) produced by different manufacturers is different, and in the production of the corrugated paper box, a folding device is required to be used for folding the paper box and sealing the paper box.

The existing corrugated carton sealing and edge folding device adopts conveying to treat a conveyed carton, carries out edge moving and edge folding on the carton, and utilizes the moving adhesive tape to seal after the edge folding is finished, although the speed block is adopted in the mode, the sealing effect is poor, if the corrugated carton edge folding is incomplete, the sealing is easy to open during the adhesive tape, and the problem of debonding of the adhesive tape is caused.

In order to solve the problems, a sealing and edge folding device for processing corrugated cartons is provided.

Disclosure of Invention

The invention aims to solve the problems in the background art and provides a sealing and edge folding device for processing corrugated cartons.

In order to achieve the purpose, the invention adopts the following technical scheme: a sealing and edge folding device for processing corrugated cartons comprises a bottom plate, a top plate and two vertical plates fixedly connected between the bottom plate and the top plate at the front and back positions, wherein a conveying belt is transversely arranged between the two vertical plates, a plurality of groups of limiting blocks which are uniformly distributed at intervals are fixedly connected onto the conveying belt, each group of limiting blocks consists of two limiting blocks at intervals, a first lifting block is movably inserted above one group of limiting blocks on the top plate, the lower end of the first lifting block is fixedly connected with a folding plate, four vertical rods which are distributed in a rectangular shape are vertically and fixedly connected to the outer side of the lower end of the folding plate, folding rollers are rotatably connected to the lower ends of the four vertical rods, an adhesive plate is arranged at the lower end of the folding plate and on the inner sides of the four folding rollers, electric telescopic rods are fixedly mounted on the two sides of the transverse axis of the upper end of the folding, an arc-shaped block is fixedly connected with the adhesive plate, a movable cavity is formed in the position where the electric telescopic rod is located in the adhesive plate, the telescopic end of the electric telescopic rod penetrates through the movable cavity, a movable block is fixedly sleeved on the telescopic end of the electric telescopic rod and in the movable cavity, and a first spring is fixedly connected between the movable block and the inner bottom wall of the movable cavity;

corrugated cases are placed on the conveying belt and in each group of limiting blocks, two arc blocks are positioned below the two sides of the corrugated cases, the central position of the left side of the lower end of the pasting plate is fixedly connected with an adsorption block, the left side of the adsorption block is vertically and fixedly connected with a cutter, the front end and the rear end of the folding plate are both provided with sliding grooves, two sliding blocks are respectively connected in the sliding grooves in a sliding manner, the bottom of each sliding groove positioned at the front end is provided with a rack, a pinion is meshed on the rack, the front end of the pinion is rotatably connected with the sliding blocks, the front end of each sliding block positioned at the front end is fixedly provided with a small motor, the output end of each small motor is fixedly connected with the pinion, the lower sides of the two sliding blocks, which are far away from one end of the sliding grooves, are respectively and fixedly connected with a connecting rod, the lower ends of the two connecting rods are jointly, a guide roller is arranged on the vertical plate and on the right side of the adhesive tape, and an adsorption plate is arranged on the right side of the guide roller;

a second lifting block is movably inserted into a corresponding position above a group of limit blocks on the left side of a group of limit blocks corresponding to the lower part of the first lifting block on the top plate, a rectangular shaping plate is fixedly connected to the lower end of the second lifting block, a rectangular shaping groove is formed in the lower end of the shaping plate, extrusion plates are vertically and slidably connected to the left side and the right side of the top wall in the shaping groove, the two extrusion plates are parallel to the inner walls of the left side and the right side of the shaping groove, a magnet and an electromagnet are fixedly connected to the opposite sides of the extrusion plates and the inner wall of the shaping groove respectively, and a second spring is fixedly connected between the extrusion plates and the inner wall of the shaping;

the device comprises a top plate, a first lifting block, a second lifting block, a driving motor, a worm gear, a driving rod, a first driving cavity, a second driving cavity, a fixed block, a first toothed plate and a second toothed plate, wherein the driving motor is fixedly arranged at the upper end of the top plate and between the first lifting block and the second lifting block, the output end of the driving motor is fixedly sleeved with the worm, the lower end of the worm is meshed with the worm gear, the center position of the worm gear is transversely and fixedly provided with the driving rod in a penetrating manner, the first lifting block and the second lifting block are respectively internally provided with the first driving cavity and the second driving cavity, both sides of the first driving cavity and the second driving cavity are respectively provided with a sliding hole, two ends of the driving rod are respectively arranged in a penetrating manner through the sliding holes of the first lifting block and the second lifting block and fixedly connected with the fixed block, the two fixed blocks are respectively and fixedly connected at the upper, the first long gear and the second long gear are respectively meshed with the first toothed plate and the second toothed plate.

In the above sealing and flanging device for corrugated case processing, the magnetic poles of the magnet and the electromagnet close to one side are the same.

In the sealing and flanging device for processing the corrugated case, the surfaces of the four folding rollers are smooth surfaces.

In the sealing and edge folding device for processing the corrugated carton, the lower end of the cutter is slightly longer than the adsorption block, and the arc block is higher than the adsorption block.

In the sealing and edge folding device for processing the corrugated carton, the right side of the opposite side of the two vertical plates is fixedly connected with the folding limiting block.

In the sealing and flanging device for corrugated carton processing, the upper end of the bottom plate is provided with the air suction device, and the air suction end of the air suction device is communicated with the adsorption block and the adsorption plate.

Compared with the prior art, this corrugated box processing lies in with sealing hem device's advantage:

1. the first lifting block and the second lifting block are driven by one driving motor to lift, the corrugated case below is sealed, folded and shaped, and manufacturing cost is saved.

2. Sealing the hem to corrugated box, driving through electric telescopic handle and pasting the board and move down, directly pasting the fixed glue and sealing the department, electric telescopic handle continues the extension, and at this moment under the effect of carton supporting force, the movable block moves down in the activity intracavity, the first spring of compression, then accessible arc piece is with the sticky tape adhesion at the edge in the carton both sides, when having avoided removing the adhesion sticky tape in the past, the sticky tape is pasted and is not worried about the condition of leaning on.

3. Through setting up the setting device, will paste the corrugated box of sticky tape and stereotype, make its both sides paste more compactly, make the department of hem keep the shape good simultaneously, prevent that its hem is not in place, improve the quality of sealing the hem.

Drawings

Fig. 1 is a front perspective view of a sealing and edge-folding device for corrugated carton processing according to the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1;

FIG. 4 is an enlarged view of the structure at C in FIG. 1;

fig. 5 is a schematic view of a bottom view of a folding plate of the sealing and edge-folding device for corrugated carton processing according to the present invention;

fig. 6 is a schematic view of a part of the structure on the right side of the sealing and folding device for corrugated carton processing according to the present invention.

In the figure: 1, 2 vertical plates, 3 top plates, 4 conveyor belts, 5 limit blocks, 6 first lifting blocks, 7 folding plates, 8 folding rollers, 9 electric telescopic rods, 10 pasting plates, 11 movable cavities, 12 movable blocks, 13 first springs, 14 arc-shaped blocks, 15 adsorption blocks, 16 cutters, 17 sliding grooves, 18 racks, 19 small motors, 20 connecting rods, 21 pneumatic clamps, 22 films, 23 guide rollers, 24 adsorption plates, 25 second lifting blocks, 26 shaping plates, 27 shaping grooves, 28 extrusion plates, 29 magnets, 30 electromagnets, 31 second springs, 32 driving motors, 33 worms, 34, 35 driving rods, 36 first toothed plates, 37 second toothed plates, 38 first long gears, 39 second long gears, 40 fixed blocks, 41 folding limit blocks and 42 suction devices.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

Referring to fig. 1-6, a sealing and edge folding device for corrugated carton processing comprises a bottom plate 1, a top plate 3 and two vertical plates 2 fixedly connected at the front and rear positions between the bottom plate 1 and the top plate 3, wherein a conveyor belt 4 is transversely arranged between the two vertical plates 2, the conveyor belt 4 is a stepping conveyor belt (the stepping conveyor belt is a prior art and is not described herein), a plurality of groups of stoppers 5 uniformly distributed at intervals are fixedly connected to the conveyor belt 4, each group of stoppers 5 consists of two stoppers 5 at intervals, the unit moving distance of the conveyor belt 4 is the distance between the two groups of stoppers 5, a first lifting block 6 is movably inserted at the top plate 3 above one group of stoppers 5, the lower end of the first lifting block 6 is fixedly connected to a folding plate 7, four vertical rods distributed in a rectangular shape are vertically and fixedly connected to the outer side of the lower end of the folding plate 7, when the folding plate 7 descends, the folding roller 8 can be driven to move downwards to carry out edge folding operation on the corrugated case, the lower end of the folding plate 7 and the inner sides of the four folding rollers 8 are provided with the pasting plate 10, the two sides of the transverse axis of the upper end of the folding plate 7 are both fixedly provided with the electric telescopic rods 9, the telescopic ends of the electric telescopic rods 9 sequentially penetrate through the folding plate 7 and the pasting plate 10 and are fixedly connected with arc-shaped blocks 14, the movable cavities 11 are arranged in the pasting plate 10 and begin from the positions of the electric telescopic rods 9, the telescopic ends of the electric telescopic rods 9 penetrate through the movable cavities 11, the movable blocks 12 are fixedly sleeved on the telescopic ends of the electric telescopic rods 9 and are arranged in the movable cavities 11, the first springs 13 are fixedly connected between the movable blocks 12 and the inner bottom wall of the movable cavities 11 together, the electric telescopic rods 9 can drive the pasting plate 10 to move downwards when extending until the pasting plate 10 and the upper end of the corrugated case are connected, the, the arcuate block 14 continues to descend.

Corrugated cases are placed on the conveyor belt 4 and in each group of limiting blocks 5, two arc blocks 14 are positioned below and correspond to the two sides of the corrugated cases, when the arc blocks 14 descend, so that adhesive tapes can be adhered to the two sides of the cases, an adsorption block 15 is fixedly connected to the central position of the left side of the lower end of the adhering plate 10 and is used for adsorbing the adhesive tapes, a cutter 16 is vertically and fixedly connected to the left side of the adsorption block 15 and is used for cutting the adhesive tapes, sliding grooves 17 are formed in the front and rear ends of the folding plate 7, sliding blocks are connected in the two sliding grooves 17 in a sliding manner, a rack 18 is arranged at the bottom of the sliding groove 17 at the front end, a pinion is meshed on the rack 18, the front end of the pinion is rotatably connected with the sliding blocks, a small motor 19 is fixedly installed at the front end of the sliding block at the front end, the output end of the small motor 19 is fixedly connected with the pinion, connecting rods 20 are fixedly, lie in 2 front ends of riser of rear side and be equipped with film 22 in 7 left side positions of folded sheet, riser 2 is last and be equipped with deflector roll 23 on the right side of film 22, deflector roll 23 right side is equipped with adsorption plate 24, the sticky tape is walked around deflector roll 23 in advance and will be pasted the face and place down on adsorption plate 24 that the surface is not stained with, fix its position through the negative pressure, remove to spout 17 left end through small-size motor 19 drive air jig 21, with the sticky tape centre gripping on the adsorption plate 24, and draw to the right-hand member, then when folded sheet 7 moves down, accessible cutter 16 cuts off the sticky tape and adsorbs by adsorption block 15, conveniently paste work.

A second lifting block 25 is movably inserted at a corresponding position above a group of limiting blocks 5 on the left side of a group of limiting blocks 5 corresponding to the lower part of the first lifting block 6 on the top plate 3, a rectangular shaping plate 26 is fixedly connected to the lower end of the second lifting block 25, a rectangular shaping groove 27 is formed in the lower end of the shaping plate 26, extrusion plates 28 are vertically and slidably connected to the left and right sides of the top wall in the shaping groove 27, the two extrusion plates 28 are parallel to the inner walls of the left and right sides of the shaping groove 27, a magnet 29 and an electromagnet 30 are respectively fixedly connected to the opposite sides of the extrusion plates 28 and the inner wall of the shaping groove 27, a second spring 31 is commonly and fixedly connected between the extrusion plates 28 and the inner wall of the shaping groove 27, the magnetic poles of the magnet 29 and the electromagnet 30 close to one side are the same, when the shaping plate 26 moves down, the sealing edge folding position of the carton can be positioned, the pressing plate 28 presses the adhesive tape on the side of the carton to make it adhere.

A driving motor 32 is fixedly arranged at the upper end of the top plate 3 and between the first lifting block 6 and the second lifting block 25, a worm 33 is fixedly sleeved at the output end of the driving motor 32, a worm wheel 34 is meshed at the lower end of the worm 33, a driving rod 35 is transversely and fixedly arranged at the center position of the worm wheel 34 in a penetrating manner, a first driving cavity and a second driving cavity are respectively arranged in the first lifting block 6 and the second lifting block 25, sliding holes are respectively arranged at the two sides of the first driving cavity and the second driving cavity, fixing blocks 40 are respectively arranged at the two ends of the driving rod 35 in a penetrating manner and fixedly connected with the sliding holes of the first lifting block 6 and the second lifting block 25, the two fixing blocks 40 are respectively and fixedly connected at the upper end of the top plate 3, a first toothed plate 36 and a second toothed plate 37 are respectively and fixedly connected on the inner walls at the rear sides of the first driving cavity and the second driving cavity, a first long gear 38 and a second long gear 39 are respectively and fixedly connected on the, the first long gear 38 and the second long gear 39 are respectively meshed with the first toothed plate 36 and the second toothed plate 37, so that when one driving motor 32 rotates, the device can simultaneously perform sealing, edge folding and positioning work, can stably stop under the self-locking effect of the worm and gear, and reduces the manufacturing cost.

The surfaces of the four folding rollers 8 are smooth surfaces, so that the surfaces of the cartons are not abraded when the folding rollers are folded conveniently.

The lower end of the cutter 16 is slightly longer than the adsorption block 15, the arc block 14 is higher than the adsorption block 15, and the cutter is firstly cut off and then is adsorbed.

The right side positions of the opposite sides of the two vertical plates 2 are fixedly connected with folding limiting blocks 41, so that the carton can keep a state of waiting for folding when entering the device.

The upper end of the bottom plate 1 is provided with an air suction device 42, and the air suction end of the air suction device 42 is communicated with the adsorption block 15 and the adsorption plate 24 to provide the adsorption force of the device.

In the invention, a processing person puts a corrugated case to be sealed and folded into a group of limit blocks 5 on a conveyor belt 4, manually turns four sealed edges of the case inwards to enable the case to enter the device through a folding limit block 41 and move to the lower part of a folding roller 8 in a pre-folding state, the sealed edges at the front side and the rear side are contacted with the folding roller 8, at the moment, a pneumatic clamp 21 is driven to move to the left end of a chute 17 under the driving of a small motor 19 to clamp an adhesive tape adsorbed on an adsorption plate 24 and pull the adhesive tape to the right side, a driving motor 32 drives a driving rod 35 to rotate through the transmission of a worm 33 and a worm wheel 34, a first long gear 38 rotates, the first lifting block 6 is driven to move downwards under the state that the first long gear 38 is meshed with a first toothed plate 36, then the folding plate 7 moves downwards, the four folded edges are closed through the folding roller 8, a cutter 16 cuts off the adhesive tape at the left side in the downward moving process, the adhesive tape is kept unchanged under the clamping of the adsorption block 15 and the pneumatic clamp 21 by the adsorption block 15, the two electric telescopic rods 9 extend to drive the adhesive plate 10 to move downwards to enable the adhesive tape to be adhered to the sealing position and to be firmly adhered under the downward pressure of the adhesive plate 10, meanwhile, the pneumatic clamp 21 and the adsorption block 15 stop clamping and adsorption, the electric telescopic rods 9 continue to extend, at the moment, under the action of the supporting force of the carton, the movable block 12 moves downwards in the movable cavity 11 to compress the first spring 13, then the adhesive tape at the edge can be adhered to two sides of the carton through the arc-shaped block 14, meanwhile, the second lifting block 25 drives the shaping plate 26 to move downwards through the meshing of the second long gear 39 and the second toothed plate 37 when the driving rod 35 rotates, so that the upper end of the carton after the adhesive tape is adhered to the shaping groove 27, the folding edge of the carton is shaped through the shaping groove 27, and the electromagnet 30 is electrified, the magnetic repulsion with the magnet 29 causes the extrusion plate 28 to extrude the adhesive tapes at the two sides of the carton, so that the adhesive tapes are tightly adhered, the sealing and folding edges of the carton are finished with high quality, and the conditions of untidy adhesion and non-in-place folding edges are avoided. The hem seals and the design goes on simultaneously, and the two is accomplished the back and is passed through driving motor 32's reversal, drives first elevator 6 and second elevator 25 simultaneously and rises to reset, and conveyer belt 4 drives the unit distance that the carton removed a set of stopper 5, carries out next circulation afterwards and seals hem and location work.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A sealing and hemming device for corrugated box processing, comprising a bottom plate (1), a top plate (3) and two vertical plates (2) fixedly connected in front and rear positions between the bottom plate (1) and the top plate (3), which It is characterized in that a conveyor belt (4) is laterally arranged between the two vertical plates (2), and a plurality of sets of evenly spaced limit blocks (5) are fixedly connected to the conveyor belt (4), and each set of the limit blocks (5) is provided. The position blocks (5) are each composed of two limit blocks (5) at intervals, and a first lifting block (6) is movably inserted on the top plate (3) and above a set of limit blocks (5), so A folding plate (7) is fixedly connected to the lower end of the first lifting block (6), and four vertical rods distributed in a rectangular shape are vertically fixed and connected to the outer side of the lower end of the folding board (7), and the lower ends of the four vertical rods are all rotated. A folding roller (8) is connected, the lower end of the folding plate (7) is provided with a sticking plate (10) inside the four folding rollers (8), the upper end of the folding plate (7) is on both sides of the transverse axis An electric telescopic rod (9) is fixedly installed, the telescopic ends of the electric telescopic rod (9) are arranged through the folding plate (7) and the sticking plate (10) in sequence, and an arc block (14) is fixedly connected, and the sticking plate (14) is fixedly connected. Inside the plate (10) and at the position of the electric telescopic rod (9), there is a movable cavity (11), the telescopic end of the electric telescopic rod (9) is arranged through the movable cavity (11), and the electric telescopic rod (9) ) A movable block (12) is fixedly sleeved on the telescopic end and in the movable cavity (11), and a first spring (13) is fixedly connected between the movable block (12) and the inner bottom wall of the movable cavity (11). ;

Corrugated carton boxes are placed on the conveyor belt (4) and in each set of limit blocks (5), the two arc-shaped blocks (14) are located below corresponding to both sides of the corrugated carton box, and the stickers (10) ), an adsorption block (15) is fixedly connected at the center of the left side of the lower end, a cutter (16) is vertically and fixedly connected to the left side of the adsorption block (15), and a chute is provided at the front and rear ends of the folding plate (7). (17), a sliding block is slidably connected in the two sliding grooves (17), and a rack (18) is arranged at the inner bottom of the sliding groove (17) at the front end, and the rack (18) is engaged with There is a pinion, the front end of the pinion is rotatably connected to the slider, a small motor (19) is fixedly installed at the front end of the slider at the front end, and the output end of the small motor (19) is fixedly connected with the pinion, and the two said A connecting rod (20) is fixedly connected to the lower side of one end of the slider away from the chute (17), and a pneumatic clamp (21) is fixedly connected to the lower ends of the two connecting rods (20) and at a position below the arc-shaped block (14). ), the front end of the vertical plate (2) located on the rear side and a film (22) is provided on the left side of the folding plate (7), and a guide film (22) is provided on the vertical plate (2) and on the right side of the film (22). a roller (23), an adsorption plate (24) is provided on the right side of the guide roller (23);

A second lift is movably inserted on the top plate (3) and above a set of limit blocks (5) on the left side of the corresponding set of limit blocks (5) below the first lift block (6). block (25), the lower end of the second lifting block (25) is fixedly connected with a rectangular shaping plate (26), the lower end of the shaping plate (26) is provided with a rectangular shaping groove (27), the shaping slot (27) ) The left and right sides of the inner top wall are vertically slidably connected with extruding plates (28), the two extruding plates (28) are parallel to the inner walls of the left and right sides of the shaping groove (27), and the extruding plates (28) A magnet (29) and an electromagnet (30) are fixedly connected to the side opposite to the inner wall of the shaping groove (27), respectively, and a second spring ( 31);

A driving motor (32) is fixedly installed on the upper end of the top plate (3) and between the first lifting block (6) and the second lifting block (25), and the output end of the driving motor (32) is fixedly sleeved with a A worm (33), a worm wheel (34) is engaged with the lower end of the worm (33), a drive rod (35) is laterally fixed and arranged in the center of the worm wheel (34), the first lifting block (6) and the second A first driving cavity and a second driving cavity are respectively opened in the lifting block (25), sliding holes are opened on both sides of the first driving cavity and the second driving cavity, and both ends of the driving rod (35) respectively penetrate through the first driving cavity and the second driving cavity. The sliding holes of the first lifting block (6) and the second lifting block (25) are provided with fixing blocks (40) and fixedly connected, and the two fixing blocks (40) are fixedly connected to the upper end of the top plate (3). A first toothed plate (36) and a second toothed plate (37) are fixedly connected to the rear inner walls of a driving cavity and a second driving cavity, respectively, and the driving rod (35) is on the first driving cavity and the second driving cavity. A first long gear (38) and a second long gear (39) are fixed and sleeved in the cavity respectively, and the first long gear (38) and the second long gear (39) are respectively connected with the first tooth plate (36) and the second long gear (39). The second tooth plate (37) is engaged.

2 . The sealing and hemming device for corrugated box processing according to claim 1 , characterized in that the magnet ( 29 ) and the electromagnet ( 30 ) have the same magnetic poles on the adjacent side. 3 .

3 . The sealing and hemming device for corrugated box processing according to claim 1 , wherein the surfaces of the four folding rollers ( 8 ) are smooth surfaces. 4 .

4 . The sealing and hemming device for corrugated box processing according to claim 1 , wherein the lower end of the cutter ( 16 ) is slightly longer than the suction block ( 15 ), and the position of the arc block ( 14 ) higher than the suction block (15).

5 . The sealing and hemming device for corrugated box processing according to claim 1 , wherein a folding limit block ( 41 ) is fixedly connected to the right side of the two vertical plates ( 2 ). 6 .

6 . The sealing and hemming device for corrugated box processing according to claim 1 , wherein the upper end of the bottom plate ( 1 ) is provided with a suction device ( 42 ), and the suction end of the suction device is connected to the upper end of the suction device. 7 . The adsorption block (15) and the adsorption plate (24) are communicated.