Efficient film coating processing device for manufacturing irregular components of bamboo building

Abstract

The invention relates to the field of laminating, in particular to an efficient laminating processing device for manufacturing irregular components of bamboo buildings, which comprises a laminating machine, a base is arranged on the side of the laminating machine, the top of the base is slidably connected with a moving frame through an electric slider, the moving frame is used for storing components, and the right upper portion of the laminating machine is connected with an air cylinder. The bottom of a telescopic rod of the air cylinder is slidably connected with the flattening piece, and the outer portion of the flattening piece is slidably connected with the cutter. The flattening piece and the cutter are controlled to move downwards through the air cylinder, the flattening piece can move downwards in advance to press film cloth on the edge of a component downwards, in this way, the film cloth on the edge can be attached to the component more tightly, then a first wedge-shaped block is extruded open through an extrusion frame, then the wedge-shaped frame releases the cutter, and the film cloth on the edge can be attached to the component more tightly. And the cutter can quickly move downwards to cut off the film cloth due to the force of the first spring, so that the film cutting efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the field of film coating, in particular to a high-efficiency film coating processing device for manufacturing irregular components of bamboo and wood buildings. Background Art

[0002] In the manufacturing process of bamboo and wood buildings, many irregular components are used. Since irregular bamboo and wood components are prone to moisture and corrosion, they usually need to be coated after they are produced. Coating can effectively prevent the wood boards from getting damp, protect the back of the wood boards from being eaten by insects, extend the service life of the floor, and have certain acid and alkali resistance and corrosion resistance. The coating process for irregular components is very different from that for conventional components. Conventional components are generally square. When coating square components, hot coating or cold coating can be used, and the coating process is relatively simple. However, some irregular components have the special feature of being uneven, so the difficulty of coating will be greatly increased. Hot laminating machines will be used for coating irregular components.

[0003] The component is placed in a movable frame, and then the film cloth is covered on the top of the component, and then the movable frame is moved into a hot laminating machine. The hot laminating machine has vacuuming, hot pressing and compounding mechanisms inside. After starting the hot laminating machine, the component can be laminated. After the laminating is completed, the movable frame drives the component out of the laminating machine, and then a tool is needed to cut the film around the component. The existing film cutting usually uses a blade for manual cutting, which can easily cause the film covered at the incision position to float up during cutting, making it impossible to make the film flat, and the incision is uneven, requiring subsequent processing, which is inefficient. Therefore, a high-efficiency laminating processing device for manufacturing irregular components of bamboo and wood buildings is now developed to overcome the above-mentioned defects. Summary of the Invention

[0004] The technical solution is: an efficient laminating processing device for manufacturing irregular components of bamboo and wood buildings, including a laminating machine, a base is provided on the side of the laminating machine, the top of the base is slidably connected to a movable frame through an electric slider, the movable frame is used to store components, the upper right part of the laminating machine is connected to a cylinder, the bottom of the telescopic rod of the cylinder is slidably connected to a flattening piece, and the outside of the flattening piece is slidably connected to a tool.

[0005] Furthermore, it also includes a first spring, the top of the first spring is connected to the tool, the bottom of the first spring is fixedly connected to the flattening piece, the flattening piece is slidably connected to a symmetrically arranged wedge frame, a second spring is connected between the wedge frame and the flattening piece, the second spring is wound on the wedge frame, the top of the wedge frame is fixedly connected to the first wedge block, a third spring is connected between the top of the flattening piece and the bottom of the telescopic rod of the cylinder, the third spring is wound around the telescopic rod of the cylinder, the telescopic rod of the cylinder is connected to a symmetrically arranged extrusion frame, and the extrusion frame is provided with a symmetrically arranged inclined surface on the side close to the first wedge block, and the inclined surface of the extrusion frame is extruded and fitted with the first wedge block.

[0006] Furthermore, it also includes a pulling frame, which is symmetrically arranged and fixedly connected to the extrusion frame, and the pulling frame and the tool are extrusion-fitted.

[0007] Furthermore, a blocking member is included. The blocking member is arranged on a side of the laminating machine close to the cylinder, and the bottom of the blocking member is squeeze-fitted with the flattening member.

[0008] Furthermore, it also includes a sliding rack, multiple sliding racks are slidably connected to the movable frame, the sliding racks are respectively located on the four sides of the component, and the sides of the sliding racks close to each other are rotatably connected to the rotating rod, the rotating rod is fitted with an adhesive film, and the sliding rack is provided with a driving component for driving the sliding rack to move.

[0009] Furthermore, the driving assembly includes a threaded rod, which is rotatably connected to the side of the moving frame close to the sliding frame, the threaded rod and the adjacent sliding frame are threadedly connected, and the side of the threaded rod away from each other is connected to a first gear, and the first gear is meshed with a first rack, and the first rack is connected to the moving frame through a damping sliding connection.

[0010] Furthermore, it also includes a magnet block, which is connected to the top of the first rack, and L-shaped rods are connected to the four sides of the flattening piece. The L-shaped rod is slidingly connected to an extrusion block on the side away from the flattening piece. The extrusion block and the magnet block are matched through magnetic adsorption, and a fourth spring is connected between the inner bottom of the extrusion block and the bottom of the L-shaped rod.

[0011] Furthermore, it also includes a second gear, which is fixed to the end of the rotating rod. The second gear is engaged with a second rack, and the second rack is fixedly connected to the moving frame.

[0012] Furthermore, it also includes a positioning frame, which is slidably connected to the moving frame, the top of the positioning frame and the bottom of the flattening piece are squeezed together, and a fifth spring is connected between the positioning frame and the bottom of the moving frame.

[0013] Furthermore, it also includes a centering plate, which is slidably connected to the four sides of the positioning frame, a sixth spring is connected between the outer side of the centering plate and the positioning frame, a symmetrically arranged second wedge block is fixed to the bottom of the centering plate, and a third wedge block is connected to the side of the movable frame close to the second wedge block. The third wedge block and the second wedge block are squeezed together, and a damping sleeve is set at the sliding position of the centering plate and the positioning frame.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention controls the flattening part and the tool to move downward through the cylinder. The flattening part will move downward in advance to move the membrane cloth at the edge of the component downward and flatten it, so that the membrane cloth at the edge can be more closely attached to the component. Subsequently, the first wedge block is squeezed open by the extrusion frame, thereby releasing the tool from the wedge frame. The tool will move downward rapidly due to the force of the first spring to cut the membrane cloth, thereby improving the efficiency of film cutting.

[0015] 2. The present invention squeezes the magnet block by lowering the extrusion block, so that the first rack drives the first gear to rotate, and then drives the rotating rod to move and press on the top of the membrane cloth residue through the threaded rod. In this way, the membrane cloth residue is prevented from sticking to the tool and is also prevented from moving upward with the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0018] Figure 3 For the present invention Figure 2 Schematic diagram of the three-dimensional structure at A in the middle.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the L-shaped rod, the extrusion block and the fourth spring of the present invention.

[0020] Figure 5 For the present invention Figure 2 Schematic diagram of the three-dimensional structure at point B in the middle.

[0021] Figure 6 For the present invention Figure 2 Schematic diagram of the three-dimensional structure at C in the middle.

[0022] Figure 7 It is a partial three-dimensional structural cross-sectional view of the present invention.

[0023] Explanation of the accompanying drawings: 1_laminating machine, 2_base, 3_moving frame, 4_component, 5_cylinder, 6_flattening member, 7_tool, 8_first spring, 9_wedge frame, 10_second spring, 11_first wedge block, 12_third spring, 13_extrusion frame, 131_pulling frame, 132_blocking member, 14_L-shaped rod, 15_rotating rod, 16_sliding frame, 17_threaded rod, 18_first gear, 19_first rack, 20_magnet block, 21_extrusion block, 22_fourth spring, 23_second gear, 24_second rack, 25_positioning frame, 26_fifth spring, 27_centering plate, 28_sixth spring, 29_second wedge block, 30_third wedge block, 31_damping sleeve. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] An efficient coating processing device for manufacturing irregular components of bamboo and wood buildings, such as Figure 1As shown, it includes a laminating machine 1, a base 2 is welded to the lower right part of the laminating machine 1, the base 2 is placed on the ground, the top of the base 2 is slidably connected to a movable frame 3 through an electric slider, the movable frame 3 is used to store components 4, the upper right part of the laminating machine 1 is connected to a cylinder 5 through bolts, the bottom of the telescopic rod of the cylinder 5 is slidably connected to a flattening piece 6, and the outside of the flattening piece 6 is slidably connected to a tool 7.

[0026] After the film is formed, the film is formed on the film base 1 and the film is formed on the film base 1. When the film is formed, the film is formed on the film base 1 and the film is formed on the film base 1. When the film is formed, the film is formed on the film base 1 and the film is formed on the film base 1.

[0027] like Figure 2-Figure 3 As shown, it also includes a first spring 8, the top of the first spring 8 is connected to the tool 7, the bottom of the first spring 8 is fixedly connected to the flattening piece 6, and two front-to-back symmetrical wedge frames 9 are slidably connected to the left and right sides of the flattening piece 6. A second spring 10 is connected between the wedge frame 9 and the flattening piece 6, and the second spring 10 is wound around the wedge frame 9. The top of the wedge frame 9 is fixedly connected to a first wedge block 11, and a third spring 12 is connected between the top of the flattening piece 6 and the bottom of the telescopic rod of the cylinder 5. The third spring 12 is wound around the telescopic rod of the cylinder 5, and the left and right sides of the telescopic rod of the cylinder 5 are connected to an extrusion frame 13, and the lower part of the extrusion frame 13 is provided with a front-to-back symmetrical inclined surface, and the inclined surface of the extrusion frame 13 is squeezed and fitted with the first wedge block 11.

[0028] like Figure 3 As shown, it also includes a pulling frame 131, which is fixedly connected to the front and rear sides of the extrusion frame 13, and the lower part of the pulling frame 131 is extruded and matched with the tool 7.

[0029] like Figure 1 As shown, a blocking member 132 is also included. The blocking member 132 is arranged at the upper right part of the laminating machine 1, and the bottom of the blocking member 132 is squeezed and fitted with the flattening member 6.

[0030] In the foregoing, it is explained that the cutter 7 will descend as the flattening member 6 descends. However, since the cylinder 5 will drive the flattening member 6 to descend at a uniform speed when it moves, and it is difficult for the cutter 7 to cut the film cloth when it descends at a uniform speed, this embodiment solves this problem by accelerating the cutter 7. When the flattening member 6 moves downward, the flattening member 6 will drive the extrusion frame 13, the cutter 7, the extrusion frame 13, the first wedge block 11, the wedge frame 9 and other components to move downward. After the flattening member 6 moves downward to flatten the film cloth on the four side edges of the component 4, the bottom of the flattening member 6 rests on the moving frame 3, and the flattening member 6 The movement stops, and the telescopic rod of the cylinder 5 continues to extend. At this time, the third spring 12 is compressed, and the telescopic rod of the cylinder 5 continues to extend, driving the extrusion frame 13 to move downward. When the inclined surface of the extrusion frame 13 contacts the first wedge block 11, the first wedge block 11 will be moved to the side away from each other, and the first wedge block 11 drives the wedge frame 9 to move to the side away from each other. The second spring 10 is compressed. When the wedge frame 9 moves to release the tool 7, the first spring 8 in the stretched state contracts, and the first spring 8 drives the tool 7 to move downward rapidly. The cutter 7 moves downward quickly to cut the diaphragm quickly, so that the diaphragm can be cut conveniently. Afterwards, when the telescopic rod of the cylinder 5 contracts, it drives the flattening member 6 and the extrusion frame 13 to move upward. When the flattening member 6 moves upward to the initial state, the top of the flattening member 6 is held against by the blocking member 132, and the flattening member 6 stops moving. At this time, the telescopic rod of the cylinder 5 continues to contract, and the telescopic rod of the cylinder 5 drives the extrusion frame 13 and the pulling frame 131 to move upward. When the extrusion frame 13 is separated from the first wedge block 11, under the action of the second spring 10, the flattening member 6 is pressed against the first wedge block 11. When the upper portion of the tool 7 contacts the wedge-shaped surface of the wedge-shaped frame 9, the wedge-shaped frame 9 and the first wedge-shaped block 11 are pushed away from each other. When the upper portion of the tool 7 is separated from the wedge-shaped surface of the wedge-shaped frame 9, the second spring 10 drives the wedge-shaped frame 9 and the first wedge-shaped block 11 to move and reset, and the wedge-shaped frame 9 locks the position of the tool 7 again.

[0031] like Figure 2 and Figure 5As shown, it also includes a sliding frame 16, four sliding frames 16 are slidably connected to the moving frame 3, and the sliding frames 16 are respectively located at the left, right, front and back sides of the component 4. The sides of the sliding frames 16 that are close to each other are rotatably connected to the rotating rod 15, and the rotating rod 15 is fitted with an adhesive film. A driving assembly is provided on the sliding frame 16, and the driving assembly is used to drive the sliding frame 16 to move; the driving assembly includes a threaded rod 17, and the threaded rod 17 is rotatably connected to the side of the moving frame 3 close to the sliding frame 16. The threaded rod 17 is threadedly connected to the adjacent sliding frame 16, and a first gear 18 is welded to the side of the threaded rod 17 that is away from each other. A first rack 19 is meshed with the first gear 18, and the first rack 19 is connected to the moving frame 3 through a damping sliding type.

[0032] like Figure 4 As shown, it also includes a magnet block 20, which is connected to the top of the first rack 19. The four sides of the flattening member 6 are fixedly connected to the L-shaped rod 14. The lower part of the L-shaped rod 14 is slidably connected to the extrusion block 21. The extrusion block 21 and the magnet block 20 are matched by magnetic adsorption, and a fourth spring 22 is connected between the inner bottom of the extrusion block 21 and the bottom of the L-shaped rod 14.

[0033] When the cutter 7 moves downward to cut the membrane cloth, the cutter 7 will move upward. Since the membrane cloth often has adhesion, the membrane cloth residue is easy to adhere to the cutter 7 and is pulled upward as the cutter 7 moves upward. In this way, the membrane cloth on the cutter 7 needs to be cleaned off later. For this purpose, the present embodiment adopts the following measures: when the flattening member 6 moves downward, it will drive the L-shaped rod 14, the fourth spring 22 and the extrusion block 21 to move downward as well. Before the cutter 7 contacts the membrane cloth, the bottom of the extrusion block 21 contacts the top of the magnet block 20 and pushes the magnet block 2 0 moves downward, the downward movement of the magnet block 20 will drive the first rack 19 to move downward, the downward movement of the first rack 19 will drive the first gear 18 to rotate, the rotation of the first gear 18 will drive the threaded rod 17 to rotate, the rotation of the threaded rod 17 will drive the sliding frame 16, the rotating rod 15 and the adhesive film to move closer to each other, the rotating rod 15 is pressed on the film cloth, and then, after the tool 7 moves downward to cut the film cloth, it moves upward. At this time, the rotating rod 15 can press the film cloth residue to prevent the film cloth residue from sticking to the tool 7, and also prevent the film cloth residue from moving with The tool 7 moves upward and stops moving after the first rack 19 moves to the bottom. At this time, the extrusion block 21 also stops moving, and then the L-shaped rod 14 continues to move downward. At this time, the fourth spring 22 is compressed to play a buffering role. When the flattening member 6 moves upward to drive the L-shaped rod 14, the fourth spring 22 and the extrusion block 21 to move upward, the extrusion block 21 and the magnet block 20 are magnetically attracted to each other. Therefore, when the extrusion block 21 moves upward, it will pull the magnet block 20 to move upward, and the upward movement of the magnet block 20 will drive the first rack 19 to move upward. , the first rack 19 moves upward to drive the first gear 18 and the threaded rod 17 to reverse, and the threaded rod 17 drives the sliding frame 16 and the rotating rod 15 to move away from each other. The rotating rod 15 can pull the film cloth outward through the adhesive film to clean the film cloth on the movable frame 3. When the first rack 19 moves upward to the uppermost position, the first rack 19 stops moving, and the magnet block 20 also stops moving. Then, the extrusion block 21 continues to move upward and separates from the magnet block 20. At this time, the first rack 19 will maintain the uppermost state due to damping.

[0034] like Figure 6 As shown, second gears 23 are also included. The second gears 23 are fixedly connected to both ends of the rotating rod 15. The second gears 23 are meshed with second racks 24, and the second racks 24 are fixedly connected to the moving frame 3.

[0035] In order to collect the film cloth residues, the second gear 23 is also moved when the rotating rod 15 moves to the side away from each other. Under the action of the second rack 24, the second gear 23 is driven to rotate, and the second gear 23 drives the rotating rod 15 to rotate. The rotating rod 15 will roll up the film cloth residues, so that the film cloth residues can be collected conveniently.

[0036] like Figure 7 As shown, it also includes a positioning frame 25, which is slidably connected to the moving frame 3, the top of the positioning frame 25 and the bottom of the flattening member 6 are squeezed together, and a fifth spring 26 is connected between the left and right sides of the lower part of the positioning frame 25 and the bottom of the moving frame 3.

[0037] As described above, component 4 is placed in the movable frame 3, but there is no component to restrict component 4, so a positioning frame 25 is set, and component 4 can be placed in the positioning frame 25, and component 4 is restricted by the positioning frame 25. When cutting the film, the flattening member 6 moves downward to contact the positioning frame 25, which will squeeze the positioning frame 25 downward, and the fifth spring 26 is stretched. The positioning frame 25 moves downward, which will cause the cutting position of the tool 7 to be concave. In this way, when the tool 7 moves down to the concave position, the film cloth can be broken more quickly, which is conducive to film cutting. When the flattening member 6 moves upward and separates from the positioning frame 25, the positioning frame 25 is driven to move upward and reset under the action of the fifth spring 26.

[0038] like Figure 7 As shown, if the edge size of component 4 is consistent with the size inside the positioning frame 25, although the positioning frame 25 can position the component 4, after the film cutting is completed, when the positioning frame 25 moves upward to reset, the positioning frame 25 may scrape off the film cloth pasted on the edge of the component 4, which is not conducive to lamination. For this reason, this embodiment provides a centering plate 27, which is slidably connected to the four sides of the positioning frame 25. The position of the component 4 is centered by the centering plate 27, and the positioning of the component 4 is restricted by the centering plate 27. A sixth spring 28 is connected between the outer side of the centering plate 27 and the positioning frame 25. Two second wedge blocks 29 are fixedly connected to the bottom of the centering plate 27. A third wedge block 30 is connected to the side of the movable frame 3 close to the second wedge block 29. The third wedge block 30 and the second wedge block 29 are squeezed together. A damping sleeve 31 is provided at the sliding position of the centering plate 27 and the positioning frame 25. The damping sleeve 31 can reduce the speed of the centering plate 27 moving and resetting.

[0039] When the positioning frame 25 moves downward, it will drive the center plate 27 and the second wedge block 29 to move downward. After the second wedge block 29 contacts the third wedge block 30, the second wedge block 29 will move outward, the sixth spring 28 will be compressed, and the second wedge block 29 will drive the center plate 27 to move outward, and the center plate 27 will be separated from the component 4. Afterwards, when the positioning frame 25 drives the center plate 27 and the second wedge block 29 to move upward, after the second wedge block 29 and the third wedge block 30 are separated, under the action of the sixth spring 28 and the damping sleeve 31, the speed of the center plate 27 moving inward will be reduced. In this way, the center plate 27 will not slide upward close to the side wall of the component 4, nor will it cause the membrane cloth to be lifted.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An efficient laminating processing device for manufacturing irregular components of bamboo and wood buildings, comprising a laminating machine (1), a base (2) provided on the side of the laminating machine (1), a movable frame (3) slidably connected to the top of the base (2) via an electric slider, and a component (4) stored in the movable frame (3), characterized in that: The upper right part of the laminating machine (1) is connected to a cylinder (5), the bottom of the telescopic rod of the cylinder (5) is slidably connected to a flattening member (6), and the outside of the flattening member (6) is slidably connected to a cutter (7); The invention also includes a first spring (8), the top of the first spring (8) is connected to the tool (7), the bottom of the first spring (8) is fixedly connected to the flattening member (6), the flattening member (6) is slidably connected to a symmetrically arranged wedge frame (9), a second spring (10) is connected between the wedge frame (9) and the flattening member (6), the second spring (10) is wound around the wedge frame (9), the top of the wedge frame (9) is fixedly connected to a first wedge block (11), a third spring (12) is connected between the top of the flattening member (6) and the bottom of the telescopic rod of the cylinder (5), the third spring (12) is wound around the telescopic rod of the cylinder (5), the telescopic rod of the cylinder (5) is connected to a symmetrically arranged extrusion frame (13), the extrusion frame (13) is provided with a symmetrically arranged inclined surface on one side close to the first wedge block (11), and the inclined surface of the extrusion frame (13) is extruded and matched with the first wedge block (11).

2. The high-efficiency coating processing device for manufacturing irregular components of bamboo and wood buildings according to claim 1 is characterized in that: It also includes a pulling frame (131), which is symmetrically arranged and fixedly connected to the extrusion frame (13), and the pulling frame (131) and the tool (7) are extrusion-fitted.

3. The high-efficiency coating processing device for manufacturing irregular components of bamboo and wood buildings according to claim 2 is characterized in that: It also includes a blocking member (132), which is arranged on a side of the laminating machine (1) close to the cylinder (5), and the bottom of the blocking member (132) is squeeze-fitted with the flattening member (6).

4. The high-efficiency coating processing device for manufacturing irregular components of bamboo and wood buildings according to claim 3 is characterized in that: The invention also includes a sliding frame (16), wherein a plurality of sliding frames (16) are slidably connected to the movable frame (3), and the sliding frames (16) are respectively located on four sides of the component (4). The sides of the sliding frames (16) close to each other are rotatably connected to the rotating rod (15), and the rotating rod (15) is provided with an adhesive film. The sliding frame (16) is provided with a driving assembly for driving the sliding frame (16) to move.

5. The high-efficiency film coating processing device for manufacturing irregular components of bamboo and wood buildings according to claim 4 is characterized in that: The driving assembly includes a threaded rod (17), the threaded rod (17) is rotatably connected to a side of the moving frame (3) close to the sliding frame (16), the threaded rod (17) and the adjacent sliding frame (16) are threadedly connected, and a first gear (18) is connected to the side of the threaded rod (17) away from each other, and a first rack (19) is meshed with the first gear (18), and the first rack (19) is connected to the moving frame (3) through a damping sliding manner.

6. The high-efficiency film coating processing device for manufacturing irregular components of bamboo and wood buildings according to claim 5 is characterized in that: The invention also includes a magnet block (20), the magnet block (20) is connected to the top of the first rack (19), the four sides of the flattening member (6) are connected to L-shaped rods (14), the side of the L-shaped rod (14) away from the flattening member (6) is slidably connected to an extrusion block (21), the extrusion block (21) and the magnet block (20) are matched by magnetic adsorption, and a fourth spring (22) is connected between the inner bottom of the extrusion block (21) and the bottom of the L-shaped rod (14).

7. The high-efficiency film coating processing device for manufacturing irregular components of bamboo and wood buildings according to claim 6 is characterized in that: It also includes a second gear (23), which is fixed to the end of the rotating rod (15). The second gear (23) is engaged with a second rack (24), and the second rack (24) is fixedly connected to the moving frame (3).

8. The high-efficiency film coating processing device for manufacturing irregular bamboo and wood building components according to claim 7 is characterized in that: It also includes a positioning frame (25), which is slidably connected to the moving frame (3), the top of the positioning frame (25) and the bottom of the flattening member (6) are squeezed together, and a fifth spring (26) is connected between the positioning frame (25) and the bottom of the moving frame (3).

9. The high-efficiency film coating processing device for manufacturing irregular bamboo and wood building components according to claim 8, characterized in that: The movable frame (3) further comprises a centering plate (27), the centering plate (27) being slidably connected to the four sides of the positioning frame (25), a sixth spring (28) being connected between the outer side of the centering plate (27) and the positioning frame (25), a second wedge block (29) being symmetrically arranged being fixed to the bottom of the centering plate (27), a third wedge block (30) being connected to one side of the movable frame (3) close to the second wedge block (29), the third wedge block (30) and the second wedge block (29) being extruded and fitted, and a damping sleeve (31) being provided at the sliding position of the centering plate (27) and the positioning frame (25).

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