X-ray composite protection plate processing device and method

Abstract

The present invention provides an X-ray composite protective plate processing device and method, the X-ray composite protective plate processing device comprises: a main frame and a conveyor for conveying and transferring the composite protective plate after pressing, the main frame is composed of two vertical plates symmetrical along the horizontal direction and two support frames. The present invention can realize continuous marking and pressing operations on the two sides of the X-ray composite protective plate by setting a conveying mechanism and using it in conjunction with a pressing mechanism. During the processing, the X-ray composite protective plate is placed in the installation part, and the installation part and the X-ray composite protective plate are driven by the conveying part to pass through the two pressing mechanism positions together, and during the movement, the X-ray composite protective plate is flipped synchronously without manual flipping operation, which further simplifies the operation steps, making the marking and pressing operation more convenient and faster.

Description

Technical Field

[0001] The present invention relates to the field of radiation protection plates, and in particular to a device and method for processing an X-ray composite protection plate. Background Art

[0002] X-rays are electromagnetic waves with extremely high frequency, short wavelength and great energy. They are often used in medical diagnosis, mainly by utilizing their strong penetrating ability. When X-rays pass through different tissues of the human body, due to the differences in density and thickness between tissues and different degrees of absorption, different images can be obtained after imaging processing.

[0003] Although X-rays have brought great help to people in medicine, they can also cause certain harm to the human body. Therefore, it is often necessary to install an X-ray composite protection plate in the space where the X-ray equipment is located to effectively block the X-rays and reduce the degree of harm caused by X-rays to the human body.

[0004] At present, the existing production and processing flow of X-ray composite protective plates is raw material mixing, mold forming, plate rough and fine processing, plate mark stamping, and plate mark stamping is specifically: the plate is manually placed on the clamping component of the stamping equipment and fixed, and then the surface of the plate is pressed by the vertically telescopic pressing head, and finally the pressed mark is left on the plate; however, when both sides of the X-ray composite protective plate need to be pressed, the above-mentioned stamping equipment has the following shortcomings in the actual processing process:

[0005] (1) Since the stamping equipment can only press one side of the X-ray composite protection plate at a time, after pressing one side of the X-ray composite protection plate, it needs to be manually turned over and pressed on the other side. After pressing, the X-ray composite protection plate needs to be removed manually. The whole process is cumbersome. If there are a large number of X-ray composite protection plates, the workload of the staff is large, resulting in a slow processing speed.

[0006] (2) Due to the long plate structure of the existing pressing head, only one pressing mark is set at the bottom of the pressing head. If the pressing marks are different, the only way is to replace a different pressing head. Frequent replacement of the pressing head is troublesome and easy to damage the pressing head. Summary of the invention

[0007] The present invention provides an X-ray composite protection plate processing device, which solves the problem of cumbersome manual flipping operation of the X-ray composite protection plate.

[0008] In order to solve the above technical problems, the present invention provides an X-ray composite protective plate processing device, comprising: a main frame and a conveyor for conveying and transferring the composite protective plate after pressing, the main frame is composed of two vertical plates and two support frames symmetrical in the horizontal direction, the inner sides of the two support frames are respectively fixedly connected to the outer sides of the two vertical plates, the conveyor is located at one end of the main frame for unloading, the conveyor is perpendicular to the vertical plates, the main frame is provided with a conveying mechanism for linearly conveying and flipping the composite protective plate, the conveying mechanism comprises a conveying part and a plurality of mounting parts for clamping and fixing the composite protective plate, the plurality of mounting parts are evenly mounted on the conveying part, and the conveying part can drive the plurality of mounting parts to circulate;

[0009] Two pressing mechanisms are provided on the outer side of one of the vertical plates, which are used to press marks on the front and back sides of the composite protective plate respectively. Two support plates are fixedly connected between the opposite sides of the two vertical plates and respectively located directly below the two pressing mechanisms. The support plates are used to provide support for the mounting part.

[0010] Preferably, the conveying part includes two rotating parts and two rotating motors which are respectively rotatably installed at both ends between opposite sides of the two vertical plates. The two rotating motors are symmetrically fixedly installed at both ends of one of the vertical plates. The output ends of the two rotating motors are respectively fixedly connected to one end of the two rotating parts. The rotating part is composed of a rotating shaft and two transmission wheels which are symmetrically fixedly installed at the ends of the two rotating shafts. The two opposite transmission wheels on the two rotating shafts are connected by a transmission belt.

[0011] Preferably, the mounting portion comprises a rectangular frame located between the two vertical plates, the frame is fixedly connected with a rotating rod on both sides close to the two vertical plates, one end of the rotating rod away from the frame is rotatably connected to the transmission belt, and a gear is fixedly mounted on the outer side of the rotating rod.

[0012] Preferably, two tooth plate groups parallel to the transmission belt are fixedly connected between the two vertical plates, and the two tooth plate groups are adapted to the gears. One of the tooth plate groups is composed of two tooth plates symmetrically installed on the inner sides of the two vertical plates, and the teeth of the two tooth plates on one of the tooth plate groups face upward and close to the upper end of the transmission belt, and the teeth of the two tooth plates on the other tooth plate group face downward and close to the lower end of the transmission belt.

[0013] Preferably, a clamping assembly is provided in the middle of each of the four sides of the frame, and the clamping assembly includes two electromagnetic plates arranged opposite to each other, and the two electromagnetic plates generate the same magnetic poles after being energized, one of the electromagnetic plates is fixedly installed in the middle of the inner wall of the frame, and the other electromagnetic plate is slidably connected to the side of the frame through two spring rods.

[0014] Preferably, the pressing mechanism comprises an inverted L-shaped fixing frame, a telescopic component is vertically fixedly installed on a horizontal section of the fixing frame, and a pressing head is fixedly connected to the telescopic end of the telescopic component and located directly above the support plate.

[0015] Preferably, the pressing head includes an inverted U-shaped connecting seat, a polyhedron with different pressing marks is rotatably installed between the two vertical sections of the connecting seat, a plurality of positioning grooves are provided on the two sides of the polyhedron opposite to the connecting seat, an adjusting rotating piece is rotatably installed on the horizontal section of the connecting seat, and two sliding clamps are symmetrically slidably connected to the lower end surface of the horizontal section of the connecting seat, the upper ends of the two sliding clamps are respectively threadedly connected to the two ends of the adjusting rotating piece, and the lower end of the sliding clamp is clamped with one of the positioning grooves.

[0016] Preferably, the processing method of the above-mentioned X-ray composite protection plate comprises the following steps:

[0017] S1, uniformly mixing the raw materials to obtain a coating;

[0018] S2, injecting the prepared coating layer by layer into a mold through an injection molding device;

[0019] S3, the coating is cooled and formed to obtain a composite protective plate, which is then taken out of the mold and the scraps are removed;

[0020] S4. Then, the X-ray composite protective plate processing device is used to press marks on both sides of the composite protective plate.

[0021] Compared with the related art, the X-ray composite shield processing device provided by the embodiment of the present invention has the following beneficial effects:

[0022] (1) By setting a conveying mechanism and a pressing mechanism for use together, the two sides of the X-ray composite protection plate can be continuously marked and pressed. During the processing, the X-ray composite protection plate is placed in the installation part, and the installation part and the X-ray composite protection plate are driven by the conveying part to pass through the two pressing mechanism positions. During the movement, the X-ray composite protection plate is turned over synchronously, and no manual turning operation is required, which further simplifies the operation steps, making the marking and pressing operation more convenient and faster;

[0023] (2) By setting a movable three-dimensional pressing head, the function of quickly adjusting different pressing marks can be realized. Among them, a polyhedron is set as a pressing component that contacts the X-ray composite protective plate, and different pressing marks can be set on different sides of the polyhedron. The polyhedron is rotatably connected to the connecting seat. The different pressing marks can be adjusted by rotating the polyhedron without replacing the pressing head, which is more convenient to use. In addition, by setting the polyhedron and the connecting seat to be detachable, the polyhedron can be quickly disassembled and installed by using an adjusting rotating piece and a sliding clamp, which is convenient for manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the X-ray composite protection plate processing device provided by the present invention.

[0025] Figure 2 for Figure 1 A cross-sectional view of an X-ray composite protective plate processing device is shown.

[0026] Figure 3 for Figure 2 The structural schematic diagram of the conveying mechanism is shown.

[0027] Figure 4 for Figure 1 A top view of the X-ray composite protective plate processing device is shown.

[0028] Figure 5 for Figure 4 A cross-sectional view of plane AA is shown.

[0029] Figure 6 for Figure 4 A cross-sectional view of the BB surface is shown.

[0030] Figure 7 for Figure 6 A partial enlarged view of area a is shown.

[0031] Figure 8 It is a structural schematic diagram of the installation part in the present invention.

[0032] Fig. 9 It is an exploded view of the press-fit head in the present invention.

[0033] Numbers in the figure: 1. main frame; 2. conveying mechanism; 21. conveying part; 211. rotating part; 212. rotating motor; 213. transmission belt; 22. mounting part; 221. frame; 222. rotating rod; 223. gear; 224. clamping assembly; 2241. electromagnetic plate; 2242. spring rod; 3. pressing mechanism; 31. fixing frame; 32. telescopic part; 33. pressing head; 331. connecting seat; 332. polyhedron; 333. adjusting rotating part; 334. sliding splint; 4. supporting plate; 5. tooth plate group; 6. conveyor. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described below with reference to the accompanying drawings. In the process, in order to ensure the clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0035] In addition, the terms used below are defined based on the functions in the present invention and may differ depending on the intention or custom of the operator; therefore, these terms are defined based on the entire contents of this specification.

[0036] Please refer to Figure 1 , Figure 2 and Figure 3 A processing device for an X-ray composite protective plate comprises: a main frame 1 and a conveyor 6 for conveying and transferring the composite protective plate after pressing, the main frame 1 is composed of two vertical plates and two support frames symmetrical in the horizontal direction, the inner sides of the two support frames are respectively fixedly connected to the outer sides of the two vertical plates, the conveyor 6 is located at one end of the main frame 1 for unloading, the conveyor 6 is perpendicular to the vertical plates, and a conveying mechanism 2 for linearly conveying and flipping the composite protective plate is arranged on the main frame 1, the conveying mechanism 2 comprises a conveying part 21 and six mounting parts 22 for clamping and fixing the composite protective plate, and the six mounting parts 22 are evenly mounted on the conveying part 21, the conveying part 21 can drive the six mounting parts 22 to circulate, and the number of the mounting parts 22 is not limited to six, and can be adjusted according to actual usage requirements; two pressing mechanisms 3 are provided on the outer side of one of the vertical plates for pressing marks on the front and back sides of the composite protective plate respectively, and two supporting plates 4 are fixedly connected between the opposite sides of the two vertical plates and respectively located directly below the two pressing mechanisms 3, and the X-ray composite protective plate is directly below the pressing mechanism 3 and mounted on the mounting part 22, and the support plate 4 is used to provide support for the mounting part 22 to prevent the pressure generated by the pressing mechanism 3 from directly acting on the conveying part 21.

[0037] Please refer to Figure 3The conveying part 21 includes two rotating parts 211 and two rotating motors 212 which are respectively rotatably installed at both ends between the opposite sides of the two vertical plates. The two rotating motors 212 are symmetrically fixedly installed at both ends of the outer side of one of the vertical plates. The output ends of the two rotating motors 212 are respectively fixedly connected to one end of the two rotating parts 211. The rotating part 211 is composed of a rotating shaft and two transmission wheels symmetrically fixedly installed at the ends of the two rotating shafts. The two opposite transmission wheels on the two rotating shafts are connected by a transmission belt 213. When the conveying part 21 is in use, the two rotating motors 212 rotate at the same time, but the two rotating parts 211 rotate synchronously on the vertical plates and drive the two transmission belts 213 to circulate respectively, and the six mounting parts 22 follow the two transmission belts 213 to move synchronously and cyclically on the main frame 1, so that the X-ray composite protective plate can be continuously transferred on the main frame 1.

[0038] Please refer to Figure 3 , Figure 4 and Figure 8The mounting portion 22 includes a rectangular frame 221 located between the two vertical plates. A rectangular placement groove is provided on the top of the frame 221 for placing the X-ray composite protection plate, and a bottom groove is provided at the bottom of the frame 221. The bottom groove is smaller than the placement groove, and the two are connected, so that after the frame 221 and the X-ray composite protection plate are turned over 180 degrees, the back of the X-ray composite protection plate will not be wrapped by the frame 221, which is convenient for pressing the back side; the frame 221 is fixedly connected with two sides close to the two vertical plates The rotating rod 222 has one end away from the frame 221 and is rotatably connected to the transmission belt 213. A gear 223 is fixedly sleeved on the outer side of the rotating rod 222. Since the rotating rod 222 and the transmission belt 213 are rotatably connected, when the transmission belt 213 moves, the frame 221 can always move in a horizontal upward state under the action of gravity. Two toothed plate groups 5 parallel to the transmission belt 213 are fixedly connected between the two vertical plates. Both toothed plate groups 5 are adapted to the gear 223, and one of the toothed plate groups 5 is adapted to the gear 223. It is composed of two toothed plates symmetrically installed on the inner sides of the two vertical plates, wherein the teeth of the two toothed plates of one toothed plate group 5 face upward and are close to the upper end of the transmission belt 213, and the teeth of the two toothed plates of the other toothed plate group 5 face downward and are close to the lower end of the transmission belt 213. After the pressing mechanism 3 completes the pressing operation on one side of the X-ray composite protective plate, the transmission belt 213 continues to drive the mounting part 22 to move. When the gear 223 moves to the position of the toothed plate group 5 above the vertical plate, the two gears 223 on the frame 221 are respectively at the positions of the two toothed plates. Engagement, as the frame 221 continues to move, the gear 223 can be synchronously rotated and horizontally moved on the tooth plate, and the rotating rod 222 and the frame 221 can be driven to rotate synchronously until the gear 223 is separated from the tooth plate. At this time, the frame 221 and the X-ray composite protective plate thereon are flipped exactly one hundred and eighty degrees until they move to the upper position of the second support plate 4, and the back side of the X-ray composite protective plate is pressed by another pressing mechanism 3, completing the continuous and automatic pressing operation on both sides of the X-ray composite protective plate.

[0039] Please refer to Figure 8A clamping assembly 224 is provided in the middle of each of the four sides of the frame 221. The clamping assembly 224 includes two electromagnetic plates 2241 arranged opposite to each other. The two electromagnetic plates 2241 have the same magnetic poles when energized. When no X-ray composite protection plate is installed in the frame 221, the two electromagnetic plates 2241 remain in close contact, so that the rectangular groove on the frame 221 is in the maximum state, which is convenient for placing the X-ray composite protection plate. One of the electromagnetic plates 2241 is fixedly installed in the middle of the inner wall of the frame 221, and the other electromagnetic plate 2241 is slidably connected to the side of the frame 221 through two spring rods 2242, and can slide horizontally on the frame 221. The spring rods 2242 are made of The sliding rod is composed of a spring sleeved on the outside of the sliding rod, and the spring is located on the outside of the frame 221. After the two electromagnetic plates 2241 are energized to generate the same magnetic poles, the electromagnetic plate 2241 connected to the spring extends toward the inside of the frame 221, and the spring is squeezed until one side of the electromagnetic plate 2241 contacts the X-ray composite protective plate. The four X-ray composite protective plates are respectively in contact with the four sides of the X-ray composite protective plate, so that the X-ray composite protective plate can be stably installed in the frame 221. When taking out the X-ray composite protective plate, it is only necessary to control the two electromagnetic plates 2241 to be powered off. Under the elastic force of the spring rod 2242, the electromagnetic plate 2241 can be separated from the X-ray composite protective plate.

[0040] Please refer to Figure 6 , Figure 7 and Fig. 9The pressing mechanism 3 includes an inverted L-shaped fixing frame 31, a telescopic component 32 is vertically fixedly installed on the horizontal section of the fixing frame 31, and the telescopic component 32 is a hydraulic cylinder. The telescopic end of the telescopic component 32 is located directly above the support plate 4 and is fixedly connected with a pressing head 33. The pressing head 33 includes an inverted U-shaped connecting seat 331, and a polyhedron 332 with different pressing marks is rotatably installed between two vertical sections of the connecting seat 331. The polyhedron 332 is set as a rectangular parallelepiped structure, and different pressing marks are respectively arranged on the four faces of its circumference, which are used to press the side of the X-ray composite protective plate. The polyhedron 332 is not limited to a rectangular parallelepiped structure, but can also be other structures. The more side surfaces the polyhedron 332 has, the more pressing marks can be installed. L-shaped mounting grooves are provided on the two vertical sections of the connecting seat 331, and the two ends of the polyhedron 332 are rotatably connected to the two mounting grooves through connecting shafts, so that the polyhedron 332 can be disassembled as a whole. A knob is connected to one end of one of the connecting shafts. The position and number of the side surfaces of the knob are consistent with those of the side surfaces of the polyhedron 332. When adjusting the rotation of the polyhedron 332, the polyhedron 332 can be judged. The polyhedron 332 is rotated into place, and the knob can be directly observed to be rotated into place; four positioning grooves are provided on both sides of the polyhedron 332 opposite to the connecting seat 331, and the number of the positioning grooves is consistent with the number of the sides of the polyhedron 332, and each positioning groove corresponds to a side of the polyhedron 332. The horizontal section of the connecting seat 331 is rotatably installed with an adjusting rotating member 333, and the lower end surface of the horizontal section of the connecting seat 331 is symmetrically slidably connected with two sliding clamps 334, and the upper ends of the two sliding clamps 334 are respectively threadedly connected to the two ends of the adjusting rotating member 333, and the sliding clamps 334 The lower end is engaged with one of the positioning grooves, and two sliding clamps 334 are respectively engaged with the two opposite positioning grooves at both ends of the polyhedron 332, which can lock the polyhedron 332 and prevent it from rotating. When the pressing mechanism 3 is in use, the telescopic part 32 extends downward, which can drive the connecting seat 331 and the polyhedron 332 to move downward together. When the pressing mark on the side of the polyhedron 332 contacts the upper surface of the X-ray composite protective plate, the telescopic part 32 continues to move downward, and finally leaves a mark on the upper surface of the polyhedron 332, and then the telescopic part 32 moves up and resets.

[0041] In addition, the present invention also provides a method for processing an X-ray composite protective plate, comprising the following steps:

[0042] S1, uniformly mixing the raw materials to obtain a coating;

[0043] S2, injecting the prepared coating layer by layer into a mold through an injection molding device;

[0044] S3, the coating is cooled and formed to obtain a composite protective plate, which is then taken out of the mold and the scraps are removed;

[0045] S4. Then, the X-ray composite protective plate processing device is used to press the marks on both sides of the composite protective plate. The specific steps are as follows:

[0046] First, place the first X-ray composite shield plate horizontally on the first mounting portion 22 at the upper position closest to the feeding end of the main frame 1, and then fix the four sides of the first X-ray composite shield plate respectively by the clamping assembly 224 thereon, so that the first X-ray composite shield plate is stably mounted on the first mounting portion 22;

[0047] Then, the conveying part 21 operates to drive the first mounting part 22 and the first X-ray composite protection plate to move horizontally. When the first mounting part 22 moves to a position directly below the first pressing mechanism 3, the conveying part 21 stops operating, and the first pressing mechanism 3 starts to perform marking pressing processing on the upper end surface of the first X-ray composite protection plate.

[0048] After the label pressing is completed, the conveying part 21 continues to operate, which can drive the first mounting part 22 to continue to move. When the second mounting part 22 moves to the loading end position of the main frame 1, the staff puts the second X-ray composite protection plate on the second mounting part 22;

[0049] When the first mounting portion 22 moves to the position of the first tooth plate group 5, the first mounting portion 22 and the first X-ray composite protective plate can be rotated together through the meshing action between the gear 223 and the tooth plate, until the gear 223 is separated from the tooth plate, so that the first mounting portion 22 and the first X-ray composite protective plate can be rotated exactly 180 degrees, and in this process, the second X-ray composite protective plate also synchronously completes a marking pressing operation;

[0050] Next, the first X-ray composite shielding plate and the first mounting portion 22 continue to move to a position directly below the second pressing mechanism 3, the conveying portion 21 stops operating, and the second pressing mechanism 3 performs a marking pressing process on the other surface of the first X-ray composite shielding plate. After the second marking pressing process is completed, the conveying portion 21 starts operating;

[0051] Until the first mounting portion 22 moves to the position just above the conveyor 6. At this time, since the opening of the first mounting portion 22 faces downward, the clamping assembly 224 thereon is controlled to release the clamping effect on the first X-ray composite protection plate, so that the first X-ray composite protection plate can fall directly downward onto the conveyor 6, and then the X-ray composite protection plate that has completed the two marking presses is conveyed out of the main frame 1 through the conveyor 6, completing the separation operation of the first mounting portion 22 and the first X-ray composite protection plate;

[0052] When the first mounting part 22 moves to the position below the conveying part 21, and then moves to the position of the second tooth plate group 5, the meshing action between the gear 223 and the tooth plate causes the first mounting part 22 to flip one hundred and eighty degrees again, so that it rotates to its initial state, so as to facilitate the subsequent placement of the next X-ray composite protective plate. As the conveying part 21 continues to operate, the six mounting parts 22 continuously repeat the above-mentioned actions, and can automatically and continuously complete the marking pressing operations on the second X-ray composite protective plate, the third X-ray composite protective plate, etc.

[0053] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An X-ray composite shield processing device, comprising: A main frame (1) and a conveyor (6) for conveying and transferring the composite protective plates after pressing, wherein the main frame (1) is composed of two vertical plates and two support frames which are symmetrical in the horizontal direction, the inner sides of the two support frames are respectively fixedly connected to the outer sides of the two vertical plates, the conveyor (6) is located at one end of the main frame (1) for unloading, and the conveyor (6) is perpendicular to the vertical plates, and is characterized in that: a conveying mechanism (2) for linearly conveying and flipping the composite protective plates is arranged on the main frame (1), and the conveying mechanism (2) includes a conveying part (21) and a plurality of mounting parts (22) for clamping and fixing the composite protective plates, and the plurality of mounting parts (22) are evenly mounted on the conveying part (21), and the conveying part (21) drives the plurality of mounting parts (22) to circulate; Two pressing mechanisms (3) are arranged on the outer side of one of the vertical plates, respectively used for pressing marks on the front and back sides of the composite protective plate; two support plates (4) are fixedly connected between opposite sides of the two vertical plates and respectively located directly below the two pressing mechanisms (3); the support plates (4) are used to provide support for the mounting portion (22); The pressing mechanism (3) comprises an inverted L-shaped fixing frame (31), a telescopic component (32) being vertically fixedly mounted on a horizontal section of the fixing frame (31), and a pressing head (33) being fixedly connected to the telescopic end of the telescopic component (32) and located directly above the support plate (4); The pressing head (33) comprises an inverted U-shaped connecting seat (331), a polyhedron (332) with different pressing marks is rotatably installed between two vertical sections of the connecting seat (331), a plurality of positioning grooves are provided on both sides of the polyhedron (332) opposite to the connecting seat (331), an adjusting rotating member (333) is rotatably installed on the horizontal section of the connecting seat (331), and two sliding clamps (334) are symmetrically slidably connected to the lower end surface of the horizontal section of the connecting seat (331), the upper ends of the two sliding clamps (334) are respectively threadedly connected to the two ends of the adjusting rotating member (333), and the lower end of the sliding clamp (334) is clamped with one of the positioning grooves; The conveying part (21) comprises two rotating members (211) and two rotating motors (212) which are respectively rotatably mounted at two ends between opposite sides of the two vertical plates. The two rotating motors (212) are symmetrically fixedly mounted at two ends of one of the vertical plates. The output ends of the two rotating motors (212) are respectively fixedly connected to one end of the two rotating members (211). The rotating member (211) is composed of a rotating shaft and two transmission wheels which are symmetrically fixedly mounted at the ends of the two rotating shafts. The two opposite transmission wheels on the two rotating shafts are connected in transmission via a transmission belt (213). The mounting portion (22) comprises a rectangular frame (221) located between the two vertical plates, and the frame (221) is fixedly connected to two sides close to the two vertical plates with rotating rods (222), one end of the rotating rod (222) away from the frame (221) is rotatably connected to the transmission belt (213), and a gear (223) is fixedly sleeved on the outer side of the rotating rod (222); Two toothed plate groups (5) parallel to the transmission belt (213) are respectively fixedly connected between the two vertical plates, and the two toothed plate groups (5) are both adapted to the gear (223), wherein one of the toothed plate groups (5) is composed of two toothed plates symmetrically mounted on the inner sides of the two vertical plates, wherein the teeth of the two toothed plates of one toothed plate group (5) face upward and are close to the upper end of the transmission belt (213), and the teeth of the two toothed plates of the other toothed plate group (5) face downward and are close to the lower end of the transmission belt (213); A clamping assembly (224) is provided in the middle of each of the four sides of the frame (221), and the clamping assembly (224) comprises two electromagnetic plates (2241) arranged opposite to each other, and the two electromagnetic plates (2241) generate the same magnetic poles after being energized, wherein one of the electromagnetic plates (2241) is fixedly mounted in the middle of the inner wall of the frame (221), and the other electromagnetic plate (2241) is slidably connected to the side of the frame (221) via two spring rods (2242).

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