A punching device for automobile parts production

Abstract

The invention discloses a punching device for automobile parts production, which relates to the technical field of punching, comprising a base, a driving device is fixedly installed on the top of the base, a supporting frame is fixedly installed on the output end of the driving device, a drilling machine is fixedly installed on the bottom of the supporting frame, and a leakage groove is provided on the surface of the base; a punching device, the punching device is arranged on the top of the base, the punching device comprises a placing frame, a spiral rod, a fixing frame, a spiral tube, a tooth block, a rotating plate and a limit block, the supporting frame is driven to move downward by the driving device moving downward, and the supporting frame moving downward will drive the drilling machine to move downward, the placing frame is rotatably installed on the top of the base, the bottom of the placing frame is provided with a tooth groove, the spiral rod is fixedly installed on the bottom of the supporting frame, the fixing frame is fixedly installed on the inner wall of the driving device, and the spiral tube is rotatably installed on the inner wall of the fixing frame, there is no need to adjust the position of the drilling machine, and the overall drilling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of punching, in particular to a punching device for producing automobile parts. Background Art

[0002] Auto parts are the various units that constitute the overall processing of auto parts and the products that serve the processing of auto parts. During the production process of auto parts, punching devices are required to punch holes in them to facilitate their assembly.

[0003] The patent with patent announcement number CN217529271U relates to a punching device for automobile parts production, including a support frame, hydraulic cylinders are installed on both sides of the top of the support frame, the bottom end of the hydraulic cylinder is fixedly connected to a slide, a moving frame is slidably connected to the slide, a screw a is installed in the moving frame, the screw a is threadedly connected to the drilling frame, and an adjusting frame is installed at both ends of the drilling frame, and the adjusting frame is slidably connected to a suction cup, a screw b is installed at the bottom end of the support frame, the screw b is connected to the screw c through a belt drive, the screw b and the screw c are both threadedly connected to the bottom end of the clamping frame, an electric push rod is installed at the bottom end of the support frame, and a punching plate is installed on the top of the electric push rod. The clamping frame, the electric push rod and the suction cup cooperate to fix the position of the automobile parts, and the punching effect is good; the hydraulic cylinder, the motor and the screw a cooperate to drive the drill rod on the drilling frame to move up and down, front and back and left and right, so as to facilitate the adjustment of the drilling position.

[0004] In the above patent, the position of automobile parts is fixed by the electric push rod and suction cup, and the drilling effect is good; the hydraulic cylinder, motor and screw a can drive the drill rod on the drilling frame to move up and down, front and back and left and right, which is convenient for adjusting the drilling position, but multiple motors are required to move together to drill automobile parts. The control accuracy of the motor is not high or the synchronization is poor due to mechanical factors, which may cause inaccurate drilling position or misalignment, affecting product quality and assembly accuracy. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a punching device for automobile parts production, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a punching device for automobile parts production, comprising a base, a driving device is fixedly installed on the top of the base, a support frame is fixedly installed on the output end of the driving device, a drilling machine is fixedly installed on the bottom of the support frame, and a leakage groove is opened on the surface of the base; a punching device, the punching device is arranged on the top of the base, and the punching device includes a placement frame, a spiral rod, a fixing frame, a spiral tube, a gear block, a rotating plate and a limit block. The driving device moves downward to drive the support frame to move downward, and the downward movement of the support frame will drive the drilling machine to move downward The placing frame is rotatably mounted on the top of the base, a tooth groove is provided at the bottom of the placing frame, the spiral rod is fixedly mounted on the bottom of the supporting frame, the fixing frame is fixedly mounted on the inner wall of the driving device, the spiral tube is rotatably mounted on the inner wall of the fixing frame, the spiral tube is threadedly mounted on the surface of the spiral rod, the tooth block is rotatably mounted on the bottom of the spiral tube, the tooth block is meshed with the tooth groove surface, the rotating plate is fixedly mounted on the surface of the tooth block, the limit block is fixedly mounted on the inner wall of the spiral tube, the placing frame is pushed to rotate by the tooth block, the rotation of the placing frame will drive the automobile parts to rotate, and the position of the drilling hole is adjusted by the rotation of the placing frame.

[0007] According to the above technical solution, a No. 1 torsion spring is arranged between the tooth block and the spiral tube, and the No. 1 spring drives the tooth block to reset. The limit block contacts the surface of the rotating plate, and the rotating plate is restricted by the limit block so that the rotating plate can only rotate in one direction.

[0008] According to the above technical scheme, it also includes a supporting device and a recovery device, wherein the supporting device includes a push plate, a hollow tube, a sliding plate, an elastic telescopic rod, a hydraulic rod and a supporting plate, and the push plate is driven downward by the support frame moving downward, and the downward movement of the push plate will squeeze the elastic telescopic rod to move downward, and the downward movement of the elastic telescopic rod drives the sliding plate to move downward, the push plate is fixedly installed at the bottom of the supporting frame, the hollow tube is fixedly installed at the top of the placement frame, the sliding plate is slidably installed on the inner wall of the hollow tube, the elastic telescopic rod is fixedly installed on the top of the sliding plate, the hydraulic rod is slidably installed on the inner wall of the hollow tube, and the support plate is fixedly installed at the end of the hydraulic rod away from the hollow tube.

[0009] According to the above technical solution, a trapezoidal block is slidably installed on the inner wall of the placement rack, a collecting groove is opened on the surface of the placement rack, a connecting rod is fixedly installed on the bottom of the trapezoidal block, and a short rod is fixedly installed on the bottom of the connecting rod. The support plate will squeeze the trapezoidal block to move downward, and the downward movement of the trapezoidal block will drive the connecting rod to move downward. The downward movement of the connecting rod will contact the leakage groove, and the support effect is improved by the contact between the connecting rod and the leakage groove.

[0010] According to the above technical solution, liquid is arranged inside the hollow tube, a No. 1 spring is arranged between the hollow tube and the sliding plate, and the sliding plate is driven to reset by the No. 1 spring, a No. 2 spring is arranged between the hydraulic rod and the hollow tube, and the hydraulic rod is driven to reset by the No. 2 spring, and a No. 3 spring is arranged between the placement rack and the trapezoidal block, and the trapezoidal block is driven to reset by the No. 3 spring.

[0011] According to the above technical solution, the recovery device includes a telescopic elastic rod, an L-shaped rod and a push plate. The telescopic elastic rod is driven to move in a direction away from the hollow tube by the hydraulic rod moving in a direction away from the hollow tube. The movement of the telescopic elastic rod in a direction away from the hollow tube will drive the L-shaped rod to move in a direction away from the hollow tube. The telescopic elastic rod is fixedly installed at the bottom of the hydraulic rod, the L-shaped rod is fixedly installed at the free end of the telescopic elastic rod, and the push plate is fixedly installed on the surface of the L-shaped rod.

[0012] According to the above technical solution, a pulley is rotatably installed on the surface of the push plate, a connecting plate is fixedly installed on the inner wall of the placement rack, a rotating plate is rotatably installed on the surface of the connecting plate, and a protrusion is fixedly installed on the top of the rotating plate. When the pulley moves toward the direction close to the hollow tube, it will contact the inclined surface of the rotating plate. The rotating plate will squeeze the pulley to move upward, and the upward movement of the pulley will drive the push plate to move upward.

[0013] According to the above technical solution, the push plate contacts the surface of the placement rack, a brush is provided at the bottom of the push plate, and a No. 2 torsion spring is provided between the connecting plate and the rotating plate.

[0014] The present invention provides a punching device for automobile parts production, which has the following beneficial effects:

[0015] (1) The invention drives the support frame to move downward by the driving device, and the downward movement of the support frame drives the drilling machine to move downward. The drilling machine is used to drill holes in automobile parts. At the same time, the rotating plate is limited by the limit block, so that the tooth block cannot rotate in the direction away from the tooth groove, so that the tooth block pushes the placement frame to rotate. The rotation of the placement frame drives the automobile parts to rotate. The position of the drilling hole is adjusted by the rotation of the placement frame. When the drilling machine moves downward, holes are drilled in other positions of the automobile parts without adjusting the position of the drilling machine, thereby improving the overall drilling efficiency.

[0016] (2) This invention drives the push plate downward by moving the support frame downward. The downward movement of the push plate squeezes the elastic telescopic rod downward. The downward movement of the elastic telescopic rod drives the sliding plate downward, thereby preventing the automobile parts from shaking during the drilling process, which may cause the drilling hole to shift. At the same time, the supporting effect is improved by the contact between the connecting rod and the drain groove, thereby preventing the placement frame from rotating during the drilling process, thereby affecting the drilling accuracy. At the same time, the downward movement of the connecting rod drives the short rod downward, thereby clearing the drain groove, thereby preventing the iron filings generated by the drilling from being stuck in the drain groove, thereby affecting the collection effect.

[0017] (3) The invention pushes the iron filings that have entered the support device into the drain groove by moving the push plate away from the hollow tube, thereby preventing the iron filings from accumulating on the movement trajectory of the support device and affecting the support of the automobile parts. At the same time, the push plate moves upward to prevent the iron filings from being pushed into the hollow tube during the resetting process, thereby preventing the iron filings from accumulating. At the same time, when the pulley moves upward along the inclined surface of the rotating plate, it contacts the protrusion, and the contact between the pulley and the protrusion generates vibration, thereby shaking off the iron filings attached to the brush and preventing the cleaning effect of the brush from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the spiral tube structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the hollow tube of the present invention;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the placement rack of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the hydraulic rod and the telescopic elastic rod of the present invention;

[0024] Figure 7 It is a schematic diagram of the rotating plate and the protrusion structure of the present invention.

[0025] In the figure: 1, base; 2, driving device; 3, support frame; 4, drilling machine; 5, placement frame; 6, spiral rod; 7, fixed frame; 8, spiral tube; 9, tooth block; 10, rotating plate; 11, limit block; 121, push plate; 122, hollow tube; 123, sliding plate; 124, elastic telescopic rod; 125, hydraulic rod; 126, support plate; 127, trapezoidal block; 128, connecting rod; 129, short rod; 131, telescopic elastic rod; 132, L-shaped rod; 133, push plate; 134, pulley; 135, connecting plate; 136, rotating plate; 137, bump. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 3 One embodiment of the present invention is: a punching device for automobile parts production, comprising a base 1, a driving device 2 is fixedly installed on the top of the base 1, a support frame 3 is fixedly installed on the output end of the driving device 2, a drilling machine 4 is fixedly installed on the bottom of the support frame 3, and a leakage groove is opened on the surface of the base 1; a punching device, the punching device is arranged on the top of the base 1, the punching device includes a placing frame 5, a spiral rod 6, a fixing frame 7, a spiral tube 8, a gear block 9, a rotating plate 10 and a limit block 11, and the automobile parts are drilled by the drilling machine 4, and the placing frame 5 is rotatably installed on the top of the base 1, A tooth groove is provided at the bottom of the placement frame 5, the spiral rod 6 is fixedly installed at the bottom of the support frame 3, the fixing frame 7 is fixedly installed on the inner wall of the driving device 2, the spiral tube 8 is rotatably installed on the inner wall of the fixing frame 7, the spiral tube 8 is threadedly installed on the surface of the spiral rod 6, the tooth block 9 is rotatably installed at the bottom of the spiral tube 8, the tooth block 9 is meshed with the tooth groove surface, the rotating plate 10 is fixedly installed on the surface of the tooth block 9, and the limit block 11 is fixedly installed on the inner wall of the spiral tube 8. When the drilling machine 4 moves downward, holes are drilled at other positions of the automobile parts without adjusting the position of the drilling machine 4, thereby improving the overall drilling efficiency.

[0028] A torsion spring No. 1 is arranged between the tooth block 9 and the spiral tube 8, and the tooth block 9 is reset by the spring No. 1. The limit block 11 contacts the surface of the rotating plate 10, and the rotating plate 10 is restricted by the limit block 11, so that the rotating plate 10 can only rotate in one direction.

[0029] When the embodiment is working, the driving device 2 moves downward to drive the support frame 3 to move downward, and the support frame 3 moves downward to drive the drilling machine 4 to move downward, and the drilling machine 4 is used to drill holes in automobile parts. At the same time, when the driving device 2 drives the drilling machine 4 to move downward, the spiral rod 6 moves downward, and the spiral rod 6 moves downward to squeeze the spiral tube 8 to rotate. The rotation of the spiral tube 8 drives the tooth block 9 to rotate. When the tooth block 9 contacts the tooth groove, the reverse force pushes the tooth block 9 to rotate in the direction away from the tooth groove. When the driving device 2 drives the spiral rod 6 to move upward, the spiral rod 6 drives The spiral tube 8 rotates in the opposite direction, which will drive the tooth block 9 to rotate in the opposite direction. The tooth block 9 will contact the tooth groove during the reverse rotation. The rotation of the tooth block 9 will drive the rotating plate 10 to rotate. The rotating plate 10 will be limited by the limit block 11, so that the tooth block 9 cannot rotate in the direction away from the tooth groove, so that the tooth block 9 pushes the placement rack 5 to rotate, and the rotation of the placement rack 5 will drive the automobile parts to rotate. The position of the drilling hole can be adjusted by the rotation of the placement rack 5. When the drilling machine 4 moves downward, holes can be drilled in other positions of the automobile parts. There is no need to adjust the position of the drilling machine 4, thereby improving the overall drilling efficiency.

[0030] See also Figure 1-Figure 7On the basis of the above embodiment, another embodiment of the present invention further includes a supporting device and a recovery device, the supporting device includes a push plate 121, a hollow tube 122, a sliding plate 123, an elastic telescopic rod 124, a hydraulic rod 125 and a supporting plate 126, the push plate 121 is fixedly installed at the bottom of the supporting frame 3, the hollow tube 122 is fixedly installed on the top of the placement frame 5, the sliding plate 123 is slidably installed on the inner wall of the hollow tube 122, the elastic telescopic rod 124 is fixedly installed on the top of the sliding plate 123, the hydraulic rod 125 is slidably installed on the inner wall of the hollow tube 122, and the supporting plate 126 is fixedly installed on the end of the hydraulic rod 125 away from the hollow tube 122 to prevent the automobile parts from shaking during the drilling process, causing the drilling to deviate.

[0031] A trapezoidal block 127 is slidably installed on the inner wall of the placement rack 5, and a collecting groove is opened on the surface of the placement rack 5. A connecting rod 128 is fixedly installed at the bottom of the trapezoidal block 127, and a short rod 129 is fixedly installed at the bottom of the connecting rod 128 to prevent the placement rack 5 from rotating during the drilling process, which affects the accuracy of the drilling. At the same time, the downward movement of the connecting rod 128 will drive the short rod 129 to move downward. The downward movement of the short rod 129 will dredge the leakage groove to prevent iron filings generated by drilling from being stuck in the leakage groove and affecting the collection effect.

[0032] Liquid is arranged inside the hollow tube 122, and a No. 1 spring is arranged between the hollow tube 122 and the sliding plate 123, and the sliding plate 123 is reset by the No. 1 spring. A No. 2 spring is arranged between the hydraulic rod 125 and the hollow tube 122, and the hydraulic rod 125 is reset by the No. 2 spring. A No. 3 spring is arranged between the placement frame 5 and the trapezoidal block 127, and the trapezoidal block 127 is reset by the No. 3 spring.

[0033] The recovery device includes a telescopic elastic rod 131, an L-shaped rod 132 and a push plate 133. The telescopic elastic rod 131 is fixedly installed at the bottom of the hydraulic rod 125, the L-shaped rod 132 is fixedly installed at the free end of the telescopic elastic rod 131, and the push plate 133 is fixedly installed on the surface of the L-shaped rod 132. The push plate 133 moves in a direction away from the hollow tube 122 to push the iron filings entering the supporting device into the leakage groove, thereby preventing the iron filings from accumulating on the movement trajectory of the supporting device and affecting the support of automobile parts.

[0034] A pulley 134 is rotatably mounted on the surface of the push plate 133, a connecting plate 135 is fixedly mounted on the inner wall of the placement frame 5, a rotating plate 136 is rotatably mounted on the surface of the connecting plate 135, and a protrusion 137 is fixedly mounted on the top of the rotating plate 136 to prevent the push plate 133 from pushing the iron filings in the direction of getting stuck in the hollow tube 122 during the resetting process, causing the iron filings to accumulate.

[0035] The push plate 133 contacts the surface of the placement rack 5, and a brush is provided at the bottom of the push plate 133 to push impurities into the inside of the drain groove. A second torsion spring is provided between the connecting plate 135 and the rotating plate 136, and the elastic force of the torsion spring will drive the connecting plate 135 to reset.

[0036] When the present embodiment is working, the support frame 3 moves downward to drive the push plate 121 to move downward, and the push plate 121 moves downward to squeeze the elastic telescopic rod 124 to move downward, and the elastic telescopic rod 124 moves downward to drive the sliding plate 123 to move downward, and the sliding plate 123 moves downward to squeeze the liquid inside the hollow tube 122, and the sliding plate 123 moves downward to push the liquid to squeeze the hydraulic rod 125 to move away from the hollow tube 122, and the hydraulic rod 125 moves away from the hollow tube 122 to drive the support plate 126 to move away from the hollow tube 122, and the support plate 126 moves away from the hollow tube 122 to support the automobile parts to prevent drilling. During the process, the automobile parts shake, causing the drilling to deviate. At the same time, when the support plate 126 moves away from the hollow tube 122, it will contact the trapezoidal block 127. The support plate 126 will squeeze the trapezoidal block 127 to move downward. The downward movement of the trapezoidal block 127 will drive the connecting rod 128 to move downward. The connecting rod 128 moves downward and contacts the drain groove. The contact between the connecting rod 128 and the drain groove improves the support effect, preventing the placement frame 5 from rotating during the drilling process and affecting the accuracy of the drilling. At the same time, the downward movement of the connecting rod 128 will drive the short rod 129 to move downward. The downward movement of the short rod 129 will dredge the drain groove to prevent iron filings generated by the drilling from being stuck in the drain groove and affecting the collection effect.

[0037] The movement of the hydraulic rod 125 in the direction away from the hollow tube 122 drives the telescopic elastic rod 131 to move in the direction away from the hollow tube 122. The movement of the telescopic elastic rod 131 in the direction away from the hollow tube 122 drives the L-shaped rod 132 to move in the direction away from the hollow tube 122. The movement of the L-shaped rod 132 in the direction away from the hollow tube 122 drives the push plate 133 to move in the direction away from the hollow tube 122. The movement of the push plate 133 in the direction away from the hollow tube 122 pushes the iron filings entering the supporting device into the leakage groove to prevent the iron filings from accumulating on the movement trajectory of the supporting device and affecting the support of the automobile parts. At the same time, when the push plate 133 moves in the direction away from the hollow tube 122, it will contact the rotating plate 136. The push plate 133 will push the rotating plate 136 to rotate upward. When the push plate 133 is disengaged from the rotating plate 136, the No. 4 spring will drive the rotating plate 136 to reset. When the drilling is completed The hydraulic rod 125 will be reset by the No. 3 spring, and the reset of the hydraulic rod 125 will drive the push plate 133 to move in the direction close to the hollow tube 122. The push plate 133 moving in the direction close to the hollow tube 122 will drive the pulley 134 to move in the direction close to the hollow tube 122. The pulley 134 moving in the direction close to the hollow tube 122 will contact the inclined surface of the rotating plate 136, and the rotating plate 136 will squeeze the pulley 134 to move upward. The upward movement of the pulley 134 will drive the push plate 133 to move upward, and the push plate 133 will move upward to prevent the push plate 133 from pushing the iron filings in the direction of getting stuck in the hollow tube 122 during the reset process, resulting in the accumulation of iron filings. At the same time, when the pulley 134 moves upward along the inclined surface of the rotating plate 136, it will contact the protrusion 137, and the pulley 134 will vibrate through the contact between the protrusion 137 to shake off the iron filings attached to the brush to prevent affecting the cleaning effect of the brush.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A punching device for automobile parts production, characterized in that: include: A base (1), a driving device (2) is fixedly mounted on the top of the base (1), a support frame (3) is fixedly mounted on the output end of the driving device (2), a drilling machine (4) is fixedly mounted on the bottom of the support frame (3), and a drain groove is provided on the surface of the base (1); A punching device, the punching device is arranged on the top of the base (1), the punching device comprises a placing frame (5), a spiral rod (6), a fixing frame (7), a spiral tube (8), a tooth block (9), a rotating plate (10) and a limit block (11), the placing frame (5) is rotatably mounted on the top of the base (1), a tooth groove is provided at the bottom of the placing frame (5), the spiral rod (6) is fixedly mounted on the bottom of the support frame (3), the fixing frame (7) is fixedly mounted on the inner wall of the driving device (2), the spiral tube (8) is rotatably mounted on the inner wall of the fixing frame (7), the spiral tube (8) is threadedly mounted on the surface of the spiral rod (6), the tooth block (9) is rotatably mounted on the bottom of the spiral tube (8), the tooth block (9) is meshed with the tooth groove surface, the rotating plate (10) is fixedly mounted on the surface of the tooth block (9), and the limit block (11) is fixedly mounted on the inner wall of the spiral tube (8); Wherein, a supporting device for supporting automobile parts is arranged on the placement rack (5), and a recovery device is arranged at the bottom of the supporting device; A first torsion spring is arranged between the tooth block (9) and the spiral tube (8), and the limit block (11) is in contact with the surface of the rotating plate (10); The support device comprises a push plate (121), a hollow tube (122), a sliding plate (123), an elastic telescopic rod (124), a hydraulic rod (125) and a support plate (126), wherein the push plate (121) is fixedly mounted on the bottom of the support frame (3), the hollow tube (122) is fixedly mounted on the top of the placement frame (5), the sliding plate (123) is slidably mounted on the inner wall of the hollow tube (122), the elastic telescopic rod (124) is fixedly mounted on the top of the sliding plate (123), the hydraulic rod (125) is slidably mounted on the inner wall of the hollow tube (122), and the support plate (126) is fixedly mounted on an end of the hydraulic rod (125) away from the hollow tube (122); A trapezoidal block (127) is slidably mounted on the inner wall of the placement rack (5), a collecting groove is provided on the surface of the placement rack (5), a connecting rod (128) is fixedly mounted on the bottom of the trapezoidal block (127), and a short rod (129) is fixedly mounted on the bottom of the connecting rod (128); Liquid is provided inside the hollow tube (122), a No. 1 spring is provided between the hollow tube (122) and the sliding plate (123), a No. 2 spring is provided between the hydraulic rod (125) and the hollow tube (122), and a No. 3 spring is provided between the placement frame (5) and the trapezoidal block (127); The recovery device comprises a telescopic elastic rod (131), an L-shaped rod (132) and a push plate (133); the telescopic elastic rod (131) is fixedly mounted on the bottom of the hydraulic rod (125); A pulley (134) is rotatably mounted on the surface of the push plate (133), and a connecting plate (135) is fixedly mounted on the inner wall of the placement rack (5).

2. A punching device for automobile parts production according to claim 1, characterized in that: The L-shaped rod (132) is fixedly mounted on the free end of the telescopic elastic rod (131), and the push plate (133) is fixedly mounted on the surface of the L-shaped rod (132).

3. A punching device for automobile parts production according to claim 1, characterized in that: A rotating plate (136) is rotatably mounted on the surface of the connecting plate (135), and a protrusion (137) is fixedly mounted on the top of the rotating plate (136).

4. A punching device for automobile parts production according to claim 3, characterized in that: The push plate (133) is in contact with the surface of the placement rack (5), a brush is provided at the bottom of the push plate (133), and a No. 2 torsion spring is provided between the connecting plate (135) and the rotating plate (136).

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