CN113414724B

CN113414724B - Automatic clamping device is used in bill-board processing

Info

Publication number: CN113414724B
Application number: CN202110661723.6A
Authority: CN
Inventors: 陈纯安; 樊飞燕; 向继刚
Original assignee: Hunan Weida Culture Communication Co ltd
Current assignee: Hunan Weida Culture Communication Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2023-06-02
Anticipated expiration: 2041-06-15
Also published as: CN113414724A

Abstract

The invention discloses an automatic clamping device for processing a billboard, which belongs to the field of billboard processing equipment and is used for clamping and fixing the billboard, and the clamping device comprises a placing platform, a side plate, a clamping mechanism, a Y-axis positioning mechanism, an X-axis positioning mechanism and an air cylinder; a first spring is connected between the side plate and the placing platform, the air cylinder is positioned below the placing platform and used for driving the placing platform to move up and down, the clamping mechanism is positioned above the side plate and arranged on two opposite sides of the placing platform, and the air cylinder drives the placing platform and the advertising board to clamp the advertising board up and down from two sides of the advertising board in the downward moving process; the Y-axis positioning mechanisms are positioned on two opposite sides of the direction of the Y axis of the billboard, and the air cylinder drives the placing platform to clamp the billboard along the direction of the Y axis in the downward moving process; the X-axis positioning mechanism is fixed on the placing platform and is positioned on two opposite sides of the X-axis direction of the billboard. The clamping device solves the problems that the clamping of the existing billboard clamping and fixing device is troublesome and the clamping effect is poor.

Description

Automatic clamping device is used in bill-board processing

Technical Field

The invention relates to the field of billboard processing equipment, in particular to an automatic clamping device for billboard processing.

Background

Billboards generally refer to all outdoor media for transmitting advertisement information, and the size of the media depends on the actual environment. The pictures of the shop sign, the door head and the outer facade can be manually drawn, manufactured by a computer or manufactured by printing on paper. The materials of the advertising board are generally formed by welding square tubes, angle steels and the like, and can be three-dimensional plates, lamp cloths, plastic uptake, automobile baking varnish, buckle plates, aluminum plastic plates and the like.

The application of bill-board is very extensive, in people's life, and in bill-board processing production, in order to conveniently carry out processing to the bill-board, it is fixed to need carry out the centre gripping to the bill-board to prevent that the bill-board from removing in the course of working. However, the general structure of the prior billboard clamping and fixing device is simple, the clamping is troublesome, the clamping effect is poor, the billboard is loose and misplaced in the processing process, the follow-up processing is inconvenient, and the processing efficiency and the processing quality are reduced.

In view of this, the present invention provides a novel automatic clamping device for processing billboards.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an automatic clamping device for processing a billboard, which solves the problems that the clamping of the prior billboard clamping and fixing device is troublesome and the clamping effect is poor.

In order to achieve the above purpose, the present invention provides the following technical solutions:

an automatic clamping device for processing a billboard is used for clamping and fixing the billboard and comprises a placing platform for placing the billboard, side plates supported on two sides of the bottom of the placing platform, a clamping mechanism for clamping the billboard up and down, a Y-axis positioning mechanism for clamping along the Y-axis direction, an X-axis positioning mechanism for clamping along the X-axis direction and an air cylinder for driving the placing platform to move up and down;

the side plate and the placing platform are connected with a first spring, the air cylinder is positioned below the placing platform and used for driving the placing platform to move up and down on the side plate, the clamping mechanism is positioned above the side plate and arranged on two opposite sides of the placing platform, and the air cylinder drives the placing platform and the advertising board to move down, and the clamping mechanism clamps the advertising board up and down from two sides of the advertising board;

the Y-axis positioning mechanisms are positioned on two opposite sides of the billboard in the Y-axis direction, and the air cylinder drives the placing platform and the billboard to clamp the billboard in the Y-axis direction in the downward moving process of the billboard;

the X-axis positioning mechanism is fixed on the placing platform and is positioned on two opposite sides of the X-axis direction of the billboard.

Further preferred are: the side plates comprise a base part and a supporting part, the supporting part is fixed above the base part and used for supporting the placing platform upwards, two side plates are arranged, the two side plates are symmetrically arranged on two opposite sides of the placing platform, and the air cylinder is positioned between the two side plates;

the utility model discloses a support, including placing platform, lower recess, first spring, upper end, lower recess, upper end, lower recess, place the platform with be provided with the interval between the supporting part, place the platform bottom has seted up the upper recess, the lower recess has been seted up on the supporting part, the upper recess with the lower recess is located respectively the upper and lower both sides of interval, first spring is located in the interval and upper end is fixed in the upper recess, the lower extreme is fixed in the lower recess.

Further preferred are: the clamping mechanism comprises a clamping block, a rotating shaft and a second spring;

the rotating shaft penetrates through the clamping block, two ends of the rotating shaft are respectively fixed on the placing platform, the axial direction of the rotating shaft is the X-axis direction, the second spring is positioned above the rotating shaft, one end of the second spring is fixed with the surface of the placing platform, the other end of the second spring is fixed with the inner side of the clamping block, and the second spring is positioned below the advertising board;

the clamping block comprises a block body, the upper end of the block body is provided with a gripping part for clamping the advertising board from the two sides of the advertising board up and down, and the inner side of the lower end of the block body is provided with an inclined part;

the top of the supporting part is provided with an inclined plane which is used for being in contact with the inclined part of the block body, the inclined plane is inclined from bottom to top in the direction close to the placing platform, and the top of the supporting part is inserted between the inclined part and the placing platform.

Further preferred are: the clamping mechanism further comprises a balancing weight, and the balancing weight is fixed on the outer side of the lower end of the block body.

Further preferred are: the Y-axis positioning mechanism comprises a fixed part and a movable part, and the fixed part and the movable part are respectively positioned at two opposite sides of the billboard along the Y-axis direction;

the fixing piece comprises a baffle and a cushion block, the baffle is positioned at the outer side of the billboard and fixed on the placing platform, the cushion block is fixed at one side of the baffle, which is close to the billboard, and the cushion block is used for contacting with the side part of the billboard;

the movable piece comprises a movable block, a screw and a cam, wherein the screw is vertically arranged, the lower end of the screw is inserted into the supporting part, the movable block is fixed on the surface of the placement platform, the movable block is sleeved on the screw and is in threaded fit with the screw, the movable table is positioned between the supporting part and the cam, the cam is positioned above the movable table, the cam is fixed on the screw, the circumferential surface of the cam is used for contacting with the side part of the billboard, the cylinder drives the placement platform and the movable table to move downwards, and the screw and the cam synchronously rotate around the central shaft of the screw so that the billboard is abutted against between the cam and the cushion block in the Y-axis direction.

Further preferred are: the fixing piece and the movable piece are respectively located on the same side of the advertising board with the clamping blocks, two clamping mechanisms are arranged along the X-axis direction, and the Y-axis positioning mechanism is located between the two clamping mechanisms.

Further preferred are: the X-axis positioning mechanism comprises a fixed plate, a third spring and a movable plate;

the fixed plate is fixed at the top of the placement platform and is positioned at two opposite sides of the billboard along the X-axis direction, the movable plate is positioned between the fixed plate and the billboard, the third spring is connected between the fixed plate and the movable plate, the movable plate is slidably connected on the placement platform along the X-axis direction, one side of the movable plate is connected with the third spring, and the other side of the movable plate is in contact with the side part of the billboard.

Further preferred are: the top surface of the placement platform is provided with a transverse chute, and the movable plate is embedded in the transverse chute and is in sliding fit with the transverse chute;

one side of the movable plate, which is close to the billboard, is inclined from bottom to top in the direction close to the billboard.

Further preferred are: the top of the placing platform is provided with a jacking mechanism, and the jacking mechanism comprises a jacking bead, a blind hole and a fourth spring;

the blind hole is formed in the top of the placement platform, the fourth spring is located in the blind hole, the upper end of the fourth spring is fixed with the upper top bead, the lower end of the fourth spring is fixed with the bottom of the blind hole, a flange is fixed on the upper top bead, a limiting part for limiting the flange to be separated from the blind hole is arranged at the opening of the blind hole, and the upper top bead is used for being in contact with the bottom of the advertising board.

Further preferred are: the inner wall of the blind hole is provided with a vertical chute, and the flange is embedded in the vertical chute and is in sliding fit with the vertical chute.

In summary, the invention has the following beneficial effects: because the supporting part top is inserted and is established between tilting part and place the platform, and inclined plane and tilting part contact, consequently when cylinder drove place platform, chucking piece downwardly moving, the supporting part will be close to the pivot gradually, and the chucking piece rotates gradually this moment until the gripping portion presss from both sides tight bill-board from both sides from top to bottom to the upper and lower clamp of bill-board has been realized. When the billboard is required to be loosened, the air cylinder drives the placing platform and the clamping block to move upwards, and at the moment, the clamping block reversely rotates on the rotating shaft until the gripping part is separated from the billboard.

When the billboard is clamped, firstly the billboard is placed on the placing platform, the billboard is positioned and clamped through the movable plates on the two sides of the billboard, then the air cylinder is started, so that the placing platform drives the billboard to move downwards until the clamping block clamps the billboard downwards from top to bottom, and at the moment, the billboard is also abutted between the cushion block and the cam, so that a good clamping and fixing effect can be achieved, and the billboard is processed. The automatic clamping and fixing device has the advantages of automatic clamping and fixing effects, high automation degree and poor clamping effect, and solves the problems that the clamping and fixing device of the existing advertising board is troublesome in clamping.

Drawings

FIG. 1 is a schematic top view of an embodiment, primarily for embodying the structure of an automated clamping device;

FIG. 2 is a schematic cross-sectional view of an embodiment, primarily for embodying the structure of the clamping mechanism;

FIG. 3 is an enlarged view of the structure A of FIG. 2, primarily for use in embodying the structure of the topping mechanism;

FIG. 4 is a schematic cross-sectional view of an embodiment, primarily for use in embodying the structure of a Y-axis positioning mechanism;

FIG. 5 is a schematic partial cross-sectional view of an embodiment, primarily for use in embodying the structure of the X-axis positioning mechanism.

In the figure, 101, a base portion; 102. a support part; 21. a fixing plate; 22. a third spring; 23. a movable plate; 24. a transverse chute; 31. a clamping block; 311. a block; 312. a grip portion; 313. an inclined portion; 32. balancing weight; 33. a rotating shaft; 34. a second spring; 411. a baffle; 412. a cushion block; 421. a moving block; 422. a screw; 423. a cam; 5. a billboard; 6. a cylinder; 7. spacing; 8. an inclined plane; 9. a jacking mechanism; 91. top bead; 92. a blind hole; 93. a vertical chute; 94. a fourth spring; 95. a flange; 96. a limit part; 10. placing a platform; 11. a first spring; 12. a lower groove; 13. and an upper groove.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Examples: an automatic clamping device for processing billboards is used for clamping and fixing billboards 5, and comprises a placing platform 10 for placing the billboards 5, side plates supported on two sides of the bottom of the placing platform 10, a clamping mechanism for clamping the billboards 5 up and down, a Y-axis positioning mechanism for clamping along the Y-axis direction, an X-axis positioning mechanism for clamping along the X-axis direction and an air cylinder 6 for driving the placing platform 10 to move up and down, as shown in figures 1-5. A first spring 11 is connected between the side plate and the placing platform 10, and the air cylinder 6 is positioned below the placing platform 10 and is used for driving the placing platform 10 to move up and down on the side plate. Preferably, the side plate includes a base portion 101 and a support portion 102, and the support portion 102 is fixed above the base portion 101 and serves to support the placement platform 10 upward. The curb plate is provided with two, and two curb plate symmetry set up in place the opposite both sides of platform 10, and cylinder 6 is located between two curb plates, and cylinder 6 is fixed with place platform 10 bottom center. A space 7 is arranged between the placement platform 10 and the supporting part 102, an upper groove 13 is formed in the bottom of the placement platform 10, a lower groove 12 is formed in the supporting part 102, and the upper groove 13 and the lower groove 12 are respectively located on the upper side and the lower side of the space 7. The first springs 11 are located in the space 7, the upper ends of the first springs 11 are fixed in the upper grooves 13, the lower ends of the first springs 11 are fixed in the lower grooves 12, and the first springs 11 are vertically arranged, so that the placement platform 10 is supported on the supporting portion 102 through the first springs 11. The billboard 5 is intended to be placed on top of the placement platform 10.

In the above technical scheme, the placing platform 10 is propped tightly through the side plates at the two sides, so that a good fixing effect can be achieved, meanwhile, the placing platform 10 is conveniently driven to move up and down between the side plates at the two sides through the air cylinder 6, and the device is simple and convenient to use and high in reliability.

Referring to fig. 1-5, the clamping mechanisms are located above the side plates and are arranged on two opposite sides of the placement platform 10 in the Y-axis direction, and the air cylinders 6 drive the placement platform 10 and the advertising board 5 to clamp the advertising board 5 up and down from two sides of the advertising board 5 in the downward moving process. Preferably, the clamping mechanism comprises a clamping block 31, a balancing weight 32, a rotating shaft 33 and a second spring 34. The rotating shaft 33 passes through the clamping block 31, and the two ends of the rotating shaft 33 are respectively fixed on the placing platform 10, and the axial direction of the rotating shaft 33 is the X-axis direction. The second spring 34 is located above the rotating shaft 33, one end of the second spring is fixed with the surface of the placing platform 10, the other end of the second spring is fixed with the inner side of the clamping block 31, and the second spring 34 is located below the advertising board 5. The clamping block 31 comprises a block body 311, a gripping part 312 for gripping the billboard 5 from the two sides of the billboard 5 is arranged at the upper end of the block body 311, an inclined part 313 is arranged at the inner side of the lower end of the block body 311, and the balancing weight 32 is fixed at the outer side of the lower end of the block body 311. The top of the supporting part 102 is provided with a slope 8 for contacting with the inclined part 313 of the block 311, the slope 8 is inclined from bottom to top in a direction approaching the placing platform 10, and the inclined direction of the slope 8 is the same as the inclined direction of the inclined part 313. The top of the support 102 is interposed between the inclined portion 313 and the placement platform 10.

In the above technical solution, since the top of the supporting portion 102 is inserted between the inclined portion 313 and the placement platform 10, and the inclined surface 8 contacts with the inclined portion 313, when the air cylinder 6 drives the placement platform 10 and the clamping block 31 to move downward, the supporting portion 102 gradually approaches the rotating shaft 33, and at this time, the clamping block 31 gradually rotates until the gripping portions 312 clamp the billboard 5 up and down from both sides of the billboard 5, thereby realizing up and down clamping of the billboard 5. When the billboard 5 needs to be loosened, the air cylinder 6 drives the placing platform 10 and the clamping block 31 to move upwards, and at the moment, the clamping block 31 reversely rotates on the rotating shaft 33 until the gripping part 312 is separated from the billboard 5.

Referring to fig. 1-5, the Y-axis positioning mechanisms are located at two opposite sides of the direction of the Y-axis of the billboard 5, and the air cylinder 6 drives the placement platform 10 and the billboard 5 to clamp the billboard 5 along the direction of the Y-axis in the process of moving down the billboard 5. The Y-axis positioning mechanism comprises a fixed part and a movable part, and the fixed part and the movable part are respectively positioned on two opposite sides of the billboard 5 along the Y-axis direction. The fixing piece comprises a baffle 411 and a cushion block 412, wherein the baffle 411 is positioned on the outer side of the billboard 5 and is fixed on the top of the placement platform 10, and the cushion block 412 is fixed on one side of the baffle 411 close to the billboard 5. The cushion block 412 is used for contacting with the side part of the billboard 5, and the cushion block 412 is made of silica gel or rubber. The movable member includes a moving block 421, a screw 422, and a cam 423, the screw 422 being vertically disposed with a lower end inserted into the supporting portion 102. The movable block 421 is fixed on the surface of the placement platform 10, the movable block 421 is sleeved on the screw 422 and is in threaded fit with the screw 422, the movable platform is located between the supporting portion 102 and the cam 423, and the cam 423 is located above the movable platform. The cam 423 is located outside the billboard 5 and is fixed to the screw 422, and the circumferential surface of the cam 423 is used to contact the side of the billboard 5. In the process of driving the placing platform 10 and the moving platform to move downwards by the air cylinder 6, the screw 422 and the cam 423 synchronously rotate around the central shaft of the screw 422, so that the billboard 5 is abutted between the cam 423 and the cushion block 412 in the Y-axis direction. Specifically, when the grip 312 grips the billboard 5 up and down just from both sides of the billboard 5, the side of the circumferential surface of the cam 423 farthest from the screw 422 is just in contact with the side of the billboard 5. The fixed part and the movable part are respectively positioned on the same side of the billboard 5 as the clamping blocks 31, two clamping mechanisms are arranged along the X-axis direction, and the Y-axis positioning mechanism is positioned between the two clamping mechanisms.

In the above technical solution, when the air cylinder 6 drives the placement platform 10 and the moving block 421 to move downward, the screw 422 will rotate, so as to drive the cam 423 to rotate, so that the billboard 5 is driven by the cam 423 to slightly move toward the cushion block 412, so that the billboard 5 is abutted between the cam 423 and the cushion block 412.

Referring to fig. 1-5, the X-axis positioning mechanism is fixed to the placement platform 10 on opposite sides of the billboard 5 in the X-axis direction. The X-axis positioning mechanism includes a fixed plate 21, a third spring 22, and a movable plate 23. The fixed plate 21 is fixed on the top of the placement platform 10 and is positioned on two opposite sides of the billboard 5 along the X-axis direction, and the movable plate 23 is positioned between the fixed plate 21 and the billboard 5. The third spring 22 is connected between the fixed plate 21 and the movable plate 23, and the movable plate 23 is slidably connected to the placement platform 10 along the X-axis direction. Preferably, the top surface of the placement platform 10 is provided with a transverse chute 24, the movable plate 23 is embedded in the transverse chute 24 and is in sliding fit with the transverse chute 24, and the length direction of the transverse chute 24 is the X-axis direction. One side of the movable plate 23 is connected with the third spring 22, and the other side is contacted with the side of the billboard 5. The movable plate 23 is inclined from bottom to top in the direction of approaching the billboard 5 at one side of the billboard 5, so as to play a role in limiting the billboard 5 from being separated from the placement platform 10 upwards.

In the above technical scheme, when the billboard 5 is placed, firstly, the billboard 5 is placed on the placing platform 10, and the billboard 5 is clamped by the X-axis positioning mechanism, so that the billboard 5 is flexible and convenient to use, and the billboard 5 with different sizes can be flexibly clamped.

Referring to fig. 1-5, the top of the placement platform 10 is provided with an upper ejection mechanism 9, and the upper ejection mechanism 9 includes an upper ejection bead 91, a blind hole 92, and a fourth spring 94. The blind hole 92 is formed at the top of the placement platform 10, the fourth spring 94 is located in the blind hole 92, the upper end of the fourth spring is fixed with the upper top bead 91, and the lower end of the fourth spring is fixed with the bottom of the blind hole 92. The upper top bead 91 is elliptic and spherical and has an upward outer cambered surface, a flange 95 is fixed on the upper top bead 91, and a limiting part 96 for limiting the flange 95 to be separated from the blind hole 92 is arranged at the opening of the blind hole 92. The upper top bead 91 is used to contact the bottom of the billboard 5, so that the billboard 5 is tightly held between the clamping block 31 and the upper top bead 91. The inner wall of the blind hole 92 is provided with vertical sliding grooves 93, flanges 95 are embedded in the vertical sliding grooves 93 and are in sliding fit with the vertical sliding grooves 93, the vertical sliding grooves 93 are provided with two, and the two vertical sliding grooves 93 are symmetrically arranged on two sides inside the blind hole 92. The four jacking mechanisms 9 are arranged on the placement platform 10 in a square shape, so that the advertising board 5 is uniformly stressed.

In the above technical solution, when the billboard 5 is placed on the placement platform 10, the positioning beads will tightly abut against the bottom of the billboard 5, so when the clamping block 31 clamps the billboard 5 from top to bottom, the billboard 5 at this time will tightly abut against between the clamping block 31 and the upper top bead 91.

The use process and principle are as follows: when the billboard 5 is clamped, firstly the billboard 5 is placed on the placing platform 10, the billboard 5 is positioned and clamped through the movable plates 23 on two sides of the billboard 5, then the air cylinder 6 is started, so that the placing platform 10 drives the billboard 5 to move downwards until the clamping block 31 clamps the billboard 5 downwards from top to bottom, and at the moment, the billboard 5 is also abutted between the cushion block 412 and the cam 423, so that a good clamping and fixing effect can be achieved, and the billboard 5 is processed.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that numerous improvements and modifications can be made by those skilled in the art without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.

Claims

1. Automatic clamping device is used in bill-board processing for fixed bill-board (5) of centre gripping, its characterized in that: the advertising board comprises a placing platform (10) for placing the advertising board (5), side plates supported on two sides of the bottom of the placing platform (10), a clamping mechanism for clamping the advertising board (5) up and down, a Y-axis positioning mechanism for clamping along the Y-axis direction, an X-axis positioning mechanism for clamping along the X-axis direction and a cylinder (6) for driving the placing platform (10) to move up and down;

a first spring (11) is connected between the side plate and the placing platform (10), the air cylinder (6) is positioned below the placing platform (10) and used for driving the placing platform (10) to move up and down on the side plate, the clamping mechanism is positioned above the side plate and arranged on two opposite sides of the placing platform (10), and the air cylinder (6) drives the placing platform (10) and the advertising board (5) to move down, and the clamping mechanism clamps the advertising board (5) up and down from two sides of the advertising board (5);

the Y-axis positioning mechanisms are positioned on two opposite sides of the billboard (5) in the Y-axis direction, and the air cylinder (6) drives the placing platform (10) and the billboard (5) to clamp the billboard (5) along the Y-axis direction in the downward moving process of the billboard (5);

the X-axis positioning mechanism is fixed on the placing platform (10) and is positioned at two opposite sides of the billboard (5) in the X-axis direction;

the side plates comprise a base part (101) and a supporting part (102), the supporting part (102) is fixed above the base part (101) and is used for supporting the placing platform (10) upwards, two side plates are arranged, the two side plates are symmetrically arranged on two opposite sides of the placing platform (10), and the air cylinder (6) is positioned between the two side plates;

a space (7) is arranged between the placement platform (10) and the supporting part (102), an upper groove (13) is formed in the bottom of the placement platform (10), a lower groove (12) is formed in the supporting part (102), the upper groove (13) and the lower groove (12) are respectively positioned on the upper side and the lower side of the space (7), a first spring (11) is positioned in the space (7), the upper end of the first spring is fixed in the upper groove (13), and the lower end of the first spring is fixed in the lower groove (12);

the clamping mechanism comprises a clamping block (31), a rotating shaft (33) and a second spring (34);

the rotating shaft (33) penetrates through the clamping block (31) and two ends of the rotating shaft are respectively fixed on the placing platform (10), the axial direction of the rotating shaft (33) is the X-axis direction, the second spring (34) is positioned above the rotating shaft (33) and one end of the second spring is fixed with the surface of the placing platform (10), the other end of the second spring is fixed with the inner side of the clamping block (31), and the second spring (34) is positioned below the advertising board (5);

the clamping block (31) comprises a block body (311), a gripping part (312) for clamping the advertising board (5) from the upper side and the lower side of the advertising board (5) is arranged at the upper end of the block body (311), and an inclined part (313) is arranged at the inner side of the lower end of the block body (311);

the top of the supporting part (102) is provided with an inclined surface (8) for contacting with the inclined part (313) of the block (311), the inclined surface (8) is inclined from bottom to top in the direction approaching to the placing platform (10), and the top of the supporting part (102) is inserted between the inclined part (313) and the placing platform (10);

the Y-axis positioning mechanism comprises a fixed part and a movable part, and the fixed part and the movable part are respectively positioned at two opposite sides of the billboard (5) along the Y-axis direction;

the fixing piece comprises a baffle plate (411) and a cushion block (412), the baffle plate (411) is positioned on the outer side of the billboard (5) and is fixed on the placing platform (10), the cushion block (412) is fixed on one side, close to the billboard (5), of the baffle plate (411), and the cushion block (412) is used for being in contact with the side part of the billboard (5);

the movable piece comprises a movable block (421), a screw (422) and a cam (423), wherein the screw (422) is vertically arranged, the lower end of the screw is inserted into the supporting part (102), the movable block (421) is fixed on the surface of the placement platform (10), the movable block (421) is sleeved on the screw (422) and is in threaded fit with the screw (422), the movable block is positioned between the supporting part (102) and the cam (423), the cam (423) is positioned above the movable block, the cam (423) is fixed on the screw (422), the circumferential surface of the cam (423) is used for being in contact with the side part of the advertising board (5), and in the process of driving the placement platform (10) and the downward movement of the movable block, the screw (422) and the cam (423) synchronously rotate around the central shaft of the screw (422) so that the advertising board (5) is abutted between the cam (423) and the cushion block (412) in the Y-axis direction; the clamping mechanism further comprises a balancing weight (32), and the balancing weight (32) is fixed on the outer side of the lower end of the block body (311); the fixing piece and the movable piece are respectively positioned on the same side of the advertising board (5) as the clamping blocks (31), two clamping mechanisms are arranged along the X-axis direction, and the Y-axis positioning mechanism is positioned between the two clamping mechanisms; the X-axis positioning mechanism comprises a fixed plate (21), a third spring (22) and a movable plate (23);

the fixed plate (21) is fixed at the top of the placing platform (10) and is positioned at two opposite sides of the advertising board (5) along the X-axis direction, the movable plate (23) is positioned between the fixed plate (21) and the advertising board (5), the third spring (22) is connected between the fixed plate (21) and the movable plate (23), the movable plate (23) is slidably connected on the placing platform (10) along the X-axis direction, one side of the movable plate (23) is connected with the third spring (22), and the other side of the movable plate is contacted with the side part of the advertising board (5); a transverse sliding groove (24) is formed in the top surface of the placement platform (10), and the movable plate (23) is embedded in the transverse sliding groove (24) and is in sliding fit with the transverse sliding groove (24);

one side of the movable plate (23) close to the billboard (5) is inclined from bottom to top in the direction close to the billboard (5).

2. The automatic clamping device for processing billboards of claim 1, wherein: the top of the placement platform (10) is provided with an upper jacking mechanism (9), and the upper jacking mechanism (9) comprises an upper jacking bead (91), a blind hole (92) and a fourth spring (94);

the utility model discloses a place platform, including place platform (10) and bill-board (5), including blind hole (92) and bill-board (5) and bill-board, place platform (10) top is offered to blind hole (92), fourth spring (94) are located in blind hole (92) and upper end with it is fixed to go up top pearl (91), the lower extreme with blind hole (92) bottom is fixed, go up top pearl (91) and be fixed with flange (95), blind hole (92) opening part is provided with and is used for the restriction flange (95) break away from spacing portion (96) of blind hole (92), go up top pearl (91) be used for with bill-board (5) bottom contact.

3. The automatic clamping device for processing billboards according to claim 2, wherein: the inner wall of the blind hole (92) is provided with a vertical chute (93), and the flange (95) is embedded in the vertical chute (93) and is in sliding fit with the vertical chute (93).