A circuit board placement rack

Abstract

A circuit board placement rack belongs to the technical field of circuit board storage equipment. It includes a rotating portion, a movable portion is provided at the upper end of the rotating portion, and multiple placement portions are provided on the movable portion along its length. The rotating portion is provided with a locking portion, which is connected to the movable portion and is used to lock the movement of the movable portion. The rotating portion facilitates the transfer of the placement portion after placement, and the placement portion provided on the movable portion can accommodate multiple circuit boards. The present invention also limits the position of the circuit board by providing a clamping mechanism that can clamp both sides of the circuit board. When performing glue removal operations on thin circuit boards, the circuit board is prevented from deformation or scratches or wear caused by shaking. The present invention also provides an opening and closing connector to facilitate the placement or removal of the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board storage equipment, and in particular to a circuit board placement rack. Background Art

[0002] In printed circuit board (PCB) processing, drilling and hole metallization are crucial processes, as they connect the various circuit layers of the PCB. The quality of these processes significantly impacts the reliability of the PCB. Whether mechanical or laser drilling, drilling smudges and dust remain in the holes, affecting the quality of the subsequent hole metallization. Plasma cleaning equipment is now commonly used to thoroughly remove these smudges and dust. The PCB rack is a key component of plasma cleaning equipment. The current mainstream rack utilizes a two-tiered structure: a mobile carriage and a sliding frame. The mobile carriage transports the PCBs, while the frame acts as a "dock" for the precisely arranged PCBs. Upper and lower troughs provide a two-sided positioning of the PCBs. The top trough features adjustable rails and screw-locking features, ensuring compatibility with PCBs of varying sizes while providing a rigid constraint after positioning.

[0003] However, this rack structure does have significant drawbacks in actual production. First, when circuit boards are manually inserted into the rack, they are arranged very closely together. This makes it easy for them to collide with each other during placement, causing scratches and resulting in scrapped boards. Second, the fixed gaps in the rack's grooved inner walls provide a tight fit for thick boards, but for thin boards, the boards can easily bend and deform, causing them to overlap, compromising the plasma cleaning process. Summary of the Invention

[0004] The present invention provides a circuit board placement rack to address the deficiencies of the above-mentioned prior art, solve the problem of inconvenience in placing and taking out circuit boards, and the problem of shaking of circuit boards with smaller thicknesses due to poor limiting effect, and ensure the stability of the connection between the transfer vehicle and the rack.

[0005] In order to achieve the purpose of the present invention, the following technologies are proposed:

[0006] A circuit board placement rack includes a rotating portion, a movable portion disposed at its upper end, and multiple placement portions disposed along its length on the movable portion. The rotating portion is provided with a locking portion connected to the movable portion for locking the movable portion. The rotating portion facilitates transfer of the placement portion after placement, while the placement portion disposed on the movable portion can accommodate multiple circuit boards. Furthermore, the movable portion is movably disposed on the rotating portion to facilitate placement and removal before and after transfer. When the movable portion and the rotating portion are connected, the locking portion can lock the movable portion to prevent the movable portion and the placement portions thereon from moving, thereby ensuring safety and stability during transfer.

[0007] The placement portion includes a pair of vertical connectors, each equipped with a pair of clamping mechanisms. The clamping mechanisms are arranged vertically. The clamping mechanism at the upper end is movably mounted on the vertical connector, while the clamping mechanism at the lower end is fixed to the lower end of the vertical connector. The clamping mechanism at the lower end is equipped with an opening and closing connector, which is mounted on the movable portion. The placement portion, formed by these components, can secure both sides of a circuit board via the clamping mechanisms. If the circuit board is thin, the clamping mechanism first clamps the circuit board and then applies a vertical tension force to the circuit board, thereby maintaining a tensioned state and preventing deformation. If the circuit board is thick, the two ends of the circuit board are secured by squeezing the two sides. This arrangement allows the placement portion to accommodate circuit boards of varying thicknesses and prevents deformation of thin circuit boards. The opening and closing connectors connect the lower ends of each placement portion, connecting the placement portion to the movable portion. When a circuit board is placed or removed, the connection can be removed, facilitating removal or placement of the circuit board from the placement portion.

[0008] Furthermore, the turnover part includes a rectangular bottom frame, which is fixed by four aluminum profiles and multiple angle brackets. A pair of end fixing plates are respectively installed at both ends of the rectangular bottom frame by screws, and the end fixing plates also play a role in connecting and fixing the aluminum profiles. Universal wheels are installed on the end fixing plates by bolts, and a pair of vertical rods are respectively installed at both ends of the rectangular bottom frame by screws. A rectangular top frame is installed at the upper end of the vertical rods, and multiple handles are installed on the outer side of the rectangular top frame. The multiple handles are mainly provided to facilitate the transfer operation of the turnover part. A middle rod is installed inside the rectangular top frame by bolts, and a pair of guide rails are installed at the upper end of the rectangular top frame. The length direction of the guide rails is parallel to the length direction of the rectangular top frame.

[0009] Furthermore, the movable part includes a pair of rectangular tubes, the length direction of the rectangular tubes is parallel to the length direction of the rectangular top frame, and end recesses are installed at both ends of the rectangular tubes by bolts, and a plurality of gripping holes are provided on the end recesses. A plurality of protruding shafts are fixed to the outer wall of the rectangular tube. Specifically, an inner disk is welded to the inner end of the protruding shaft, and a plurality of connecting screws are welded to the inner disk. The connecting screws are inserted into the rectangular tube, and a clamping nut is threadedly connected to the inner end of the connecting screw, and the outer end of the clamping nut acts on the inside of the rectangular tube. A pulley is rotatably provided on the protruding shaft, and a pulley limiting ring is fixed to the protruding shaft by pins or threaded connections to ensure the stability of the pulley after connection. An annular groove is provided on the outer periphery of the pulley, and the pulley is slidably provided on the guide rail, and the bottom of the annular groove is tangent to the upper end of the guide rail. The arrangement of the guide rail and the pulley can significantly improve the convenience and flexibility of the movable part during movement.

[0010] Furthermore, the interlocking portion includes a pair of guide rods threaded onto the center rod. The upper ends of the guide rods are threadedly connected to concave fasteners that are fastened to the center rod. The concave design of the concave fasteners facilitates the connection and securing of the guide rods. A limit ring is pinned to the guide rods, located on the underside of the center rod. The limit ring and the concave fastener cooperate to stabilize the guide rods. The lower ends of the guide rods are provided with end caps. A transverse plate is movably mounted on the guide rods. A first spring is sleeved on the guide rods, positioned between the end caps and the transverse plate. End arms are formed at both ends of the transverse plate, with the length of the end arms perpendicular to the length of the transverse plate. Multiple clamping plates are mounted on the transverse plate, each with a U-shaped slot at its upper end. When the interlocking portion is restraining the movable portion, the extended shaft is retained within the U-shaped slot, and the first spring is naturally extended. This improves the stability of the connection between the circulatory portion and the movable portion, preventing safety hazards during transfer. Disconnection can be achieved by pulling the transverse plate downward.

[0011] Furthermore, a pair of lifting seats are screwed onto the lower wall of the horizontal plate. The lifting seats are provided with oblique holes, with the longitudinal direction of the oblique holes at an angle to the vertical direction. A middle block is movably mounted between the lifting seats. A pressure rod is rotatably mounted at each end of the middle block, and the pressure rod is inserted into the oblique holes. Optionally, a pressure wheel is rotatably mounted on the outer end of the pressure rod. When the pressure wheel moves within the oblique holes, it can reduce the friction between the pressure rod and the oblique holes, thereby facilitating the downward movement of the clamping plate through the movement of the middle block. A pair of connecting rods are threadedly connected to the middle block, and nuts are threadedly connected to the connecting rods. The connecting rods are sleeved with end seats. The upper ends of the end seats are screwed to one end of the rectangular top frame. A pair of guide sleeves are welded to the inner side of the end seats. The connecting rods are inserted into the guide sleeves to constrain and guide the pulling and pulling of the connecting rods. The guide sleeves are threadedly connected to end caps. The connecting rods are inserted into the end caps. The connecting rods are sleeved with a second spring, which is located between the nut and the end cap. During the natural extension of the second spring, the clamping plate is connected to the extended shaft. The outer end of the connecting rod is connected to a concave pull piece through a thread. The concave pull piece is located on the outer side of the end seat. An outer pull rod is rotatably provided on the concave pull piece. The two ends of the outer pull rod are fixed with swing arms through splines. It is known that the outer end of the outer pull rod is connected to a swing arm limit nut through a thread. The swing arm limit nut can improve the connection effect between the outer pull rod and the swing arm. A connecting end rod is provided on the outer side of the other end of the swing arm. A pair of side plates are formed on both sides of the end seat. The upper ends of the side plates are opened with slots. When the extended shaft is disconnected from the U-shaped slot, the connecting end rod is inserted into the slot. When the concave pull piece is in the state of being pulled out, this state is locked by the provided swing arm and the connecting end rod thereon, so that the operator can place or remove the moving part easily. The outer circumference of the outer pull rod is welded or connected by pins to provide a limiting convex plate, and a baffle is welded to the concave pull piece. When the connecting end rod is inserted into the slot, the baffle is used to limit the rotation of the limiting convex plate. This design can limit the rotation angle of the swing arm, and when the connection between the clamping plate and the extended shaft is cancelled, the baffle blocks the limiting convex plate, so that the swing arm assumes a horizontal posture. A pair of L-shaped arms are mounted on the end seat by screws, and the ends of the L-shaped arms are fixed with a holding rod by a pair of nuts. The holding rod and the outer pull rod are located in the same plane. This design makes it easy for the operator to move the outer pull rod closer to the holding rod by gripping and tightening. The design of the holding rod also facilitates the connection and removal operations between the movable part and the rotating part.

[0012] The cam is provided with a plurality of longitudinal axes, and the longitudinal axes are connected with the longitudinal axes of the cam, and the cam is connected with the longitudinal axes of the cam, and the cam is connected with the longitudinal axes of the cam.

[0013] A fixed seat is mounted on the grooved member, and a pair of guide pins are threadedly connected to the fixed seat. The inner ends of the guide pins are equipped with limit caps. A movable plate is mounted on the guide pins, and the limit caps are located inside the movable plate to prevent the guide pins and the movable plate from becoming disconnected. A third spring is mounted on the guide pins and located between the movable plate and the fixed seat. When the outer top wheel and the plane of the expansion plate are tangent, the third spring can move the movable plate inward under the elastic force of the third spring. A concave movable plate is welded on the movable plate, and rotating seats are installed at both ends of the concave movable plate by screws. An inner pressure wheel is rotatably provided at the inner end of the rotating seat, and a push-pull arm is welded on the inner side of the concave movable plate. The connecting shaft is rotatably provided at the inner end of the push-pull arm. A pair of splints are provided in the groove-shaped member, and a pair of outward-extending convex plates are provided on the outer walls of the splints. The outward-extending convex plates are passed through both sides of the groove-shaped member, and the outer end of the outward-extending convex plate is formed with a slope, and the inner end of the slope extends inwardly. The outer periphery of the inner pressure wheel is tangent to the outer end of the outward-extending convex plate, and the design of the slope creates conditions for the outward-extending convex plate to move inward. A compression spring is fixed between the two ends of the clamping plate. When the distance between the outer top wheel and the middle through shaft changes, the inner pressure wheel can move, and the spacing between each pair of inner pressure wheels is constant. Then, when it moves, the outward protruding plate will move inward or outward. When the outward protruding plate moves inward, the two sides of the circuit board can be clamped by the clamping plate. If the inner pressure wheel cancels its effect on the outward protruding plate, the clamping plate can open under the action of the elastic force of the compression spring, thereby facilitating the placement of the circuit board.

[0014] Furthermore, to lock the rotation angle of the spread plate, a spread plate locking nut can be threadedly connected to the outer end of the central through-shaft to secure the spread plate. Alternatively, a ratchet wheel can be provided on the spread plate, and a pawl and torsion spring can be provided on the channel-shaped member. The pawl can limit the rotation angle of the spread plate by limiting the ratchet wheel, thereby ensuring the stability of the clamping plate clamping the circuit board.

[0015] Further optionally, the rotation of the support plate can be limited in the following manner: the through shaft includes an inner shaft welded to the middle position of the groove-shaped member, a spline shaft is formed at the outer end of the inner shaft, a screw is provided at the outer end of the spline shaft, and an end nut is connected to the screw through a thread.

[0016] The spline shaft is provided with a spline sleeve, the outer end of the spline sleeve is provided with an end plate, the inner wall of the end plate is provided with a plurality of wedge-shaped protrusions in a circumferential array, and an inclined surface is formed on one side of the inner end of the wedge-shaped protrusion. The spline shaft is provided with a fourth spring, which is located between the end nut and the end plate. The outer periphery of the spline sleeve is provided with a positioning rod perpendicular to its axial direction.

[0017] A locking ring is provided on the holding block, and at least a pair of rotationally symmetrical embedded grooves are provided on the locking ring. One side of the embedded groove is a vertical plane, and the other side of the embedded groove is an outer top inclined surface. A plurality of bayonet slots are formed at the outer end of the embedded groove. The outer top inclined surface acts on the inclined surface to move the positioning rod out of the bayonet slot. When the wedge-shaped protrusion passes through the embedded groove, the positioning rod is clamped in the bayonet slot.

[0018] If the above method is used to lock the rotation angle of the support plate, the positioning rod can be clamped in the bayonet to achieve the locking purpose, and the wedge-shaped protrusion and the embedded groove can also be used as limiting components. At the same time, this limiting locking method will not affect the rotation of the support plate, and locking can be achieved during the rotation process.

[0019] Furthermore, the vertical connecting member includes a pair of lower end blocks, which are mounted on the groove-shaped member on the clamping mechanism at the lower end by screws, a vertical plate welded on the lower end block, an upper end block welded on the upper end of the vertical plate, a concave member mounted between the upper end blocks by screws, a sliding sleeve is sleeved on the vertical plate, and the sliding sleeve is mounted on the groove-shaped member on the clamping mechanism at the upper end by screws, a rotating protrusion is formed on the inner side of the sliding sleeve, an inner pressure shaft is rotatably provided on the rotating protrusion, and an eccentric pressure wheel is eccentrically provided at each end of the inner pressure shaft, the outer periphery of the eccentric pressure wheel is pressed against the outer wall of the narrow side of the vertical plate, a holding end rod is welded on the inner pressure shaft perpendicular to its axial direction, and the axial direction of the holding rod is perpendicular to the line connecting the center of the eccentric pressure wheel and the center of the inner pressure shaft. When positioning the clamping mechanism at the upper end, locking can be achieved by simply rotating the eccentric pressure wheel, which has the advantage of convenient operation compared to existing screw locking.

[0020] Furthermore, the opening and closing connecting piece includes a rotating convex plate welded to one of the rectangular tubes, a hinge shaft is provided on the upper end of the rotating convex plate, a rotating recess is rotatably provided on the hinge shaft, and the rotating recess is mounted on one end of the groove-shaped piece on the clamping mechanism at the lower end by a screw, and the placement part and the moving part are connected together by the hinge shaft. When the circuit board is taken out or placed, the placement part can be rotated outward, thereby reducing the difficulty of taking out or placing the circuit board.

[0021] A connecting convex plate is welded on another rectangular tube, and a clamping shaft is provided at the upper end of the connecting convex plate. A concave clamping seat is sleeved on the upper end of the connecting convex plate, and an inner concave arc groove is opened at the lower end of the concave clamping seat. The clamping shaft is passed through the inner concave arc groove. The concave clamping seat is installed on the other end of the groove-shaped part on the clamping mechanism at the lower end by screws. The other end of the placement part can be fixed by the above components.

[0022] The cam is secured to the bottom of the L-shaped slot and is designed to fit over the bottom edge of the L-shaped slot.

[0023] The advantages of the above technical solution are:

[0024] The present invention firstly connects the turnover part and the moving part together by arranging a locking part, thereby ensuring the safety and stability of the circuit board during transfer.

[0025] Secondly, the present invention limits the circuit board by providing a clamping mechanism that can clamp both sides of the circuit board, so as to avoid deformation of the circuit board or scratches or wear of the circuit board due to shaking when performing glue removal operation on a thin circuit board.

[0026] Finally, the present invention provides an opening and closing connector to facilitate placement or removal of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Figure 1 Shown is a three-dimensional structural diagram of a circuit board placement rack.

[0029] Figure 2 A three-dimensional structural diagram of the circulation part is shown.

[0030] Figure 3 A schematic diagram of the connection between the moving part and the locking part is shown.

[0031] Figure 4 A three-dimensional structural diagram of the linkage portion from a first viewing angle is shown.

[0032] Figure 5 A three-dimensional structural diagram of the interlocking portion from a second viewing angle is shown.

[0033] Figure 6 A schematic diagram of the connection between the moving part and the placing part is shown.

[0034] Figure 7 A three-dimensional structural diagram of the placement portion from a first viewing angle is shown.

[0035] Figure 8 Shows the three-dimensional structure of the placement part from the second perspective Figure 4 .

[0036] Figure 9 A schematic diagram of the connection between the support plate and the central through shaft is shown.

[0037] Figure 10 A three-dimensional structural diagram of the expansion plate and its upper components is shown.

[0038] Figure 11 Shown is a three-dimensional structural diagram of the middle through shaft.

[0039] Figure 12 A three-dimensional structural diagram of the vertical connector, the clamping mechanism and the opening and closing connector from a first perspective is shown.

[0040] Figure 13 A three-dimensional structural diagram of the vertical connecting member, the clamping mechanism and the opening and closing connecting member from a second perspective is shown.

[0041] Figure 14 A three-dimensional structural diagram of a vertical connector is shown.

[0042] Description of reference numerals:

[0043] Turnover part 1, interlocking part 2, moving part 3, placement part 4, clamping mechanism 5, vertical connector 6, opening and closing connector 7, rectangular bottom frame 10, universal wheel 11, vertical rod 12, rectangular top frame 13, middle rod 14, handle 15, guide rail 16, end fixing plate 17, guide rod 200, concave fastener 201, limiting ring 202, end cap 203, first spring 204, horizontal plate 205, end arm 206, clamping plate 207, U-shaped slot 208, lifting seat 209, inclined hole 210, pressure rod 211, middle block 212, connecting rod 213, nut 214, second spring 215, end cover 216, end seat 217, L-shaped arm 218, holding rod 219, guide sleeve 220, concave puller 221, outer pull rod 222, swing arm 223, connecting end rod 224, limiting convex plate 225, baffle 226, side plate 227, notch 228, rectangular tube 30, extended shaft 31, pulley 32, annular groove 33, end concave member 34, holding hole 35, grooved member 500, fixed seat 501, guide pin 502, The third spring 503, the movable plate 504, the concave movable plate 505, the rotating seat 506, the inner pressure wheel 507, the push-pull arm 508, the connecting shaft 509, the outer top wheel 510, the inner shaft 511, the opening plate 512, the holding block 513, the locking ring 514, the bayonet 515, the embedded groove 516, the spline shaft 520, the end nut 521, the fourth spring 522, the end plate 523, the wedge-shaped protrusion 524, the spline sleeve 525, the positioning rod 526, the clamping plate 527, the compression spring 528, the outward protruding plate 529, the inclined Surface 530, middle through shaft 540, lower end block 60, vertical plate 61, upper end block 62, middle concave part 63, sliding sleeve 64, rotating convex part 65, inner pressure shaft 66, eccentric pressure wheel 67, holding end rod 68, rotating convex plate 700, hinge shaft 701, rotating recess 702, concave clamping seat 703, connecting convex plate 704, clamping shaft 705, inner vertical plate 706, pull rod 707, end pull plate 708, concave rod 709, inner pull plate 710, guide through rod 711, fifth spring 712, concave clamping part 713. DETAILED DESCRIPTION

[0044] like Figure 1 As shown, a circuit board placement rack includes a circulating part 1, a moving part 3 is provided at the upper end of the circulating part 1, a plurality of placement parts 4 are provided on the moving part 3 along its length direction, and a locking part 2 is provided on the circulating part 1, which is connected to the moving part 3 and is used to lock the movement of the moving part 3.

[0045] Among them, the placement part 4 includes a pair of vertical connecting parts 6, and a pair of clamping mechanisms 5 are provided on the vertical connecting parts 6. The clamping mechanisms 5 are distributed up and down. The clamping mechanism 5 at the upper end is movably provided on the vertical connecting part 6, and the clamping mechanism 5 at the lower end is fixed to the lower end of the vertical connecting part 6. The clamping mechanism 5 at the lower end is provided with an opening and closing connecting part 7, and the opening and closing connecting part 7 is provided on the moving part 3.

[0046] like Figure 2 As shown, the turnover part 1 includes a rectangular bottom frame 10, a pair of end fixing plates 17 are respectively installed at both ends of the rectangular bottom frame 10 by screws, and a universal wheel 11 is installed on the end fixing plate 17 by bolts, a pair of vertical rods 12 are respectively installed at both ends of the rectangular bottom frame 10 by screws, a rectangular top frame 13 is installed at the upper end of the vertical rod 12, a plurality of handles 15 are installed on the outside of the rectangular top frame 13, a middle rod 14 is installed on the inside of the rectangular top frame 13 by bolts, and a pair of guide rails 16 are installed on the upper end of the rectangular top frame 13, and the length direction of the guide rails 16 is parallel to the length direction of the rectangular top frame 13.

[0047] like Figure 3 As shown, the movable part 3 includes a pair of rectangular tubes 30, the length direction of the rectangular tubes 30 is parallel to the length direction of the rectangular top frame 13, and end recesses 34 are installed at both ends of the rectangular tubes 30 by bolts. A plurality of holding holes 35 are provided on the end recesses 34, and a plurality of protruding shafts 31 are fixed to the outer wall of the rectangular tubes 30. A pulley 32 is rotatably provided on the protruding shaft 31, and an annular groove 33 is provided on the outer periphery of the pulley 32. The pulley 32 is slidably provided on the guide rail 16, and the bottom of the annular groove 33 is tangent to the upper end of the guide rail 16.

[0048] like Figure 4 and Figure 5 As shown, the chain part 2 includes a pair of guide rods 200 that are passed through the middle rod 14. The upper ends of the guide rods 200 are connected with a concave fastener 201 by screw threads. The concave fastener 201 is buckled on the middle rod 14. A limit ring 202 is formed on the guide rod 200. The limit ring 202 is located on the lower side of the middle rod 14. An end cap 203 is provided at the lower end of the guide rod 200. A cross plate 205 is movably provided on the guide rod 200. A first spring 204 is provided on the guide rod 200. The first spring 204 is located between the end cap 203 and the cross plate 205. End arms 206 are formed at both ends of the cross plate 205. The length direction of the end arm 206 is perpendicular to the length direction of the cross plate 205. A plurality of clamping plates 207 are installed on the cross plate 205. The upper end of the clamping plate 207 is provided with a U-shaped slot 208. When the chain part 2 limits the movable part 3, the outward shaft 31 is clamped in the U-shaped slot 208.

[0049] When the interlocking part 2 provided in this embodiment locks the position of the movable part 3, the downward pulling force on the horizontal plate 205 is cancelled, so that the horizontal plate 205 moves upward under the action of the first spring 204, thereby clamping the extended shaft 31 in the U-shaped slot 208 of the clamping plate 207. In this way, during the transfer, the movement between the movable part 3 and the turnover part 1 can be avoided.

[0050] When the locking portion 2 provided in this embodiment cancels the locking of the position of the moving portion 3, the connection between the clamping plate 207 and the extended shaft 31 can be cancelled by pulling the horizontal plate 205 downward, and the first spring 204 is compressed at this time to provide power for the reconnection operation to restore the movement.

[0051] In order to facilitate the locking and unlocking operations of the interlocking portion 2 on the moving portion 3 , the following embodiments are provided. A pair of lifting seats 209 are installed on the lower wall of the horizontal plate 205 by screws. An inclined hole 210 is opened on the lifting seat 209. There is an angle between the length direction of the inclined hole 210 and the vertical direction. A middle block 212 is movably provided between the lifting seats 209. Pressure rods 211 are rotatably provided at both ends of the middle block 212. The pressure rod 211 is passed through the inclined hole 210. A pair of connecting rods 213 are connected to the middle block 212 by threads. Nuts 214 are connected to the connecting rods 213 by threads. End seats 217 are sleeved on the connecting rods 213. The upper ends of the end seats 217 are fixed to one end of the rectangular top frame 13 by screws. A pair of guide sleeves 220 are welded to the inner side of the end seat 217. The connecting rod 213 is passed through the guide sleeve 220. An end cover 216 is connected to the guide sleeve 220 by threads. The connecting rod 213 is passed through the end cover 216. The connecting rod 213 is sleeved with a second spring 215, the second spring 215 is located between the nut 214 and the end cover 216, the outer end of the connecting rod 213 is connected to a concave pull piece 221 through a thread, the concave pull piece 221 is located on the outer side of the end seat 217, an outer pull rod 222 is rotatably provided on the concave pull piece 221, and the two ends of the outer pull rod 222 are fixed with a swing arm 223 through a spline, and the other end of the swing arm 223 is provided with a connecting end rod 224 on the outer side. Both sides of the end seat 217 A pair of side plates 227 are formed, and a slot 228 is provided at the upper end of the side plate 227. When the extended shaft 31 is disconnected from the U-shaped slot 208, the connecting end rod 224 is passed through the slot 228. A limiting convex plate 225 is welded to the outer periphery of the outer pull rod 222, and a baffle 226 is welded on the concave pull piece 221. When the connecting end rod 224 is passed through the slot 228, the baffle 226 is used to limit the rotation of the convex plate 225.

[0052] A pair of L-shaped arms 218 are mounted on the end seat 217 by screws, and a holding rod 219 is fixed to the end of the L-shaped arm 218 by a pair of nuts.

[0053] As a supplementary embodiment, when the interlocking portion 2 is used to lock and unlock the movable portion 3 using the above-described embodiment, the following method is employed. An operator grasps the gripping rod 219 and the outer pull rod 222. The operator then pulls the outer pull rod 222 outward using the gripping rod 219. The outward movement of the outer pull rod 222 causes the entire connecting rod 213 to move outward, compressing the second spring 215. The movement of the connecting rod 213 also pulls the middle block 212 and its pressure rods 211 at both ends. The movement of the pressure rods 211 acts on the inclined hole 210, thereby causing the lifting seat 209, its horizontal plate 205, and the retaining plate 207 to move downward. During this movement, the first spring 204 is compressed. The downward movement of the retaining plate 207 releases its positional restraint on the extended shaft 31. Subsequently, the operator rotates the swing arm 223 to lock the connecting end rod 224 in the notch 228, while the swing arm 223 is in a horizontal state. The operator then pulls the movable part 3 onto the rotating part 1 or removes it from the rotating part 1.

[0054] like Figures 7 to 11 As shown, the clamping mechanism 5 includes a groove-shaped member 500, a central through shaft 540 is welded at the middle position of the groove-shaped member 500, and a support plate 512 is rotatably provided on the central through shaft 540. The support plate 512 is a long strip structure, and the two sides of the support plate 512 along its width direction are flat, and the two ends of the support plate 512 along its length direction are arc surfaces. The arc surfaces at both ends of the support plate 512 are rotationally symmetrical, and the center of the arc surface deviates from the geometric center position of the support plate 512, so that the two ends of the support plate 512 are wedge-shaped structures, and a holding block 513 is formed at the outer end of the support plate 512. The outer periphery of the support plate 512 is tangent to a pair of outer top wheels 510. The outer top wheels 510 are located on both sides of the support plate 512, and a connecting shaft 509 is provided on the outer top wheels 510.

[0055] A fixed seat 501 is installed on the groove-shaped member 500, and a pair of guide pins 502 are connected to the fixed seat 501 by threads. A limit cap is provided on the inner end of the guide pin 502, and a movable plate 504 is sleeved on the guide pin 502. A third spring 503 is sleeved on the guide pin 502, and the third spring 503 is located between the movable plate 504 and the fixed seat 501. A concave movable plate 505 is welded on the movable plate 504, and a rotating seat 506 is installed at both ends of the concave movable plate 505 by screws. An inner pressure wheel 507 is rotatably provided on the inner end of the rotating seat 506, and a push-pull arm 508 is welded on the inner side of the concave movable plate 505. The connecting shaft 509 is rotatably provided on the inner end of the push-pull arm 508.

[0056] A pair of clamps 527 are provided in the groove-shaped member 500, and a pair of protruding protrusions 529 are provided on the outer walls of the clamps 527. The protruding protrusions 529 are passed through both sides of the groove-shaped member 500. The outer ends of the protruding protrusions 529 are formed with inclined surfaces 530, and the inner ends of the inclined surfaces 530 extend inwardly. The outer periphery of the inner pressure wheel 507 is tangent to the outer ends of the protruding protrusions 529, and a compression spring 528 is fixed between the two ends of the clamps 527.

[0057] When the clamping mechanism 5 limits the two sides of the circuit board, the operator rotates the support plate 512 by holding the block 513. When the support plate 512 rotates, the outer top wheel 510 will gradually move from the plane tangent to the support plate 512 to the arc surface. When the outer top wheel 510 contacts the arc surface, it will gradually move outward. The outward movement of the outer top wheel 510 will cause the concave movable plate 505 to move outward. At the same time, the third spring 503 is compressed. As the concave movable plate 505 moves outward, the inner pressure wheel 507 will act on the inclined surface 530 of the protruding convex plate 529, so that the protruding convex plate 529 and the clamping plate 527 at its inner end move to the two sides of the circuit board, and the purpose of limiting the circuit board by the clamping plate 527 is achieved. At this time, the compression spring 528 is also in a compressed state.

[0058] In a first optional embodiment, a ratchet is fixed on the support plate 512, and the ratchet and the inner shaft 540 are coaxially arranged, and the ratchet is arranged on the inner end of the support plate 512, and a pawl is connected to the ratchet, and the inner end of the pawl is clamped in the ratchet groove of the ratchet, and the outer end of the pawl is rotatably provided with a pawl rotating pin, and the pawl rotating pin is fixed on the groove-shaped member 500, and in order to ensure that the pawl is always connected to the ratchet, a torsion spring is also provided on the pawl rotating pin, and the rotation angle of the support plate 512 can be locked at any time through the arrangement of the ratchet and the pawl to ensure the clamping effect of the clamping plate 527 on the circuit board.

[0059] A second optional embodiment can be achieved by threading a holding block 513 to tighten a nut at the outer end of the middle through shaft 540, and performing a locking operation on the rotational orientation of the support plate 512 through the nut.

[0060] In a third optional embodiment, the middle through shaft 540 includes an inner shaft 511 welded to the middle position of the grooved member 500, a spline shaft 520 is formed on the outer end of the inner shaft 511, a screw is provided on the outer end of the spline shaft 520, and an end nut 521 is connected to the screw by a thread.

[0061] A spline sleeve 525 is sleeved on the spline shaft 520, and an end plate 523 is provided at the outer end of the spline sleeve 525. The inner wall of the end plate 523 is provided with a plurality of wedge-shaped protrusions 524 in a circular array, and an inclined surface is formed on one side of the inner end of the wedge-shaped protrusion 524. A fourth spring 522 is sleeved on the spline shaft 520, and the fourth spring 522 is located between the end nut 521 and the end plate 523. A positioning rod 526 is provided on the outer periphery of the spline sleeve 525 perpendicular to its axial direction.

[0062] A locking ring 514 is provided on the holding block 513, and at least a pair of rotationally symmetrical embedded grooves 516 are provided on the locking ring 514. One side of the embedded groove 516 is a vertical plane, and the other side of the embedded groove 516 is an outer top inclined surface. The outer end of the embedded groove 516 is opened to form a plurality of bayonet holes 515. The outer top inclined surface acts on the inclined surface to move the positioning rod 526 out of the bayonet hole 515. When the wedge-shaped protrusion 524 passes through the embedded groove 516, the positioning rod 526 is clamped in the bayonet hole 515.

[0063] When this embodiment locks the rotational state of the support plate 512, when the support plate 512 rotates, the outer top inclined surface of the embedded groove 516 will act on the inclined surface of the wedge-shaped protrusion 524, so that the wedge-shaped protrusion 524, the spline sleeve 525 and the positioning rod 526 move outward under the action of the outer top inclined surface, and the fourth spring 522 is compressed, and the positioning rod 526 moves out of one of the pairs of bayonet holes 515, so that the rotation lock of the support plate 512 will be cancelled. When the support plate 512 completes its rotation, that is, the clamping plate 527 completes clamping the circuit board, the wedge-shaped protrusion 524 is reinserted into the embedded groove 516, and the positioning rod 526 is also inserted into the bayonet hole 515. At this time, it can be ensured that the support plate 512 will not rotate spontaneously, thereby ensuring the stability of the clamping of the clamping plate 527.

[0064] like Figure 12 and Figure 14 As shown, the vertical connecting member 6 includes a pair of lower end blocks 60, which are installed on the groove-shaped member 500 on the clamping mechanism 5 at the lower end by screws, and a vertical plate 61 is welded on the lower end block 60. The upper end of the vertical plate 61 is welded with an upper end block 62, and a concave member 63 is installed between the upper end blocks 62 by screws. A sliding sleeve 64 is provided on the vertical plate 61, and the sliding sleeve 64 is installed on the groove-shaped member 500 on the clamping mechanism 5 at the upper end by screws. A rotating protrusion 65 is formed on the inner side of the sliding sleeve 64, and an inner pressure shaft 66 is rotatably provided on the rotating protrusion 65. Eccentric pressure wheels 67 are eccentrically provided at both ends of the inner pressure shaft 66, and the outer periphery of the eccentric pressure wheel 67 is pressed tightly against the outer wall of the vertical plate 61. A holding end rod 68 is welded on the inner pressure shaft 66 perpendicular to its axial direction.

[0065] When the vertical connecting member 6 adjusts the position of the clamping mechanism 5 at the upper end, the operator rotates the eccentric pressure wheel 67 outward by holding the end rod 68 to disengage the eccentric pressure wheel 67 from the outer wall of the vertical plate 61, and then adjusts the position of the clamping mechanism 5 at the upper end. After adjustment, the eccentric pressure wheel 67 is rotated inward by holding the end rod 68 to tighten the outer periphery of the eccentric pressure wheel 67 to the outer wall of the vertical plate 61, and finally completes the locking of the position of the clamping mechanism 5 at the upper end.

[0066] like Figure 6 、 Figure 12 and Figure 13 As shown, the opening and closing connecting member 7 includes a rotating protrusion 700 welded to one of the rectangular tubes 30, and a hinge shaft 701 is provided at the upper end of the rotating protrusion 700. A rotating recess 702 is rotatably provided on the hinge shaft 701, and the rotating recess 702 is installed on one end of the groove-shaped member 500 on the clamping mechanism 5 at the lower end by a screw.

[0067] A connecting convex plate 704 is welded to another rectangular tube 30, and a clamping shaft 705 is provided at the upper end of the connecting convex plate 704. A concave clamping seat 703 is sleeved on the upper end of the connecting convex plate 704, and an inner concave arc groove is opened at the lower end of the concave clamping seat 703. The clamping shaft 705 is passed through the inner concave arc groove, and the concave clamping seat 703 is installed on the other end of the groove-shaped part 500 on the clamping mechanism 5 at the lower end by screws.

[0068] The lower end of the connecting convex plate 704 is provided with a concave clamping piece 713, the upper wall of the concave clamping piece 713 is provided with an L-shaped groove, the clamping shaft 705 is located in the L-shaped groove, the inner end of the concave clamping piece 713 is fixed with an inner pull plate 710 by screws, the upper end of the inner pull plate 710 is connected with a pair of guide rods 711 by threads, the inner end of the guide rods 711 is provided with an inner end cap, the guide rods 711 are provided with an inner vertical plate 706, the inner end cap is located in the inner On the inner side of the vertical plate 706, the inner vertical plate 706 is installed on the grooved member 500 on the clamping mechanism 5 at the lower end by screws, and the fifth spring 712 is sleeved on the guide through rod 711. The fifth spring 712 is located between the inner vertical plate 706 and the inner pull plate 710. The inner pull plate 710 is connected to the pull rod 707 by a thread, and the other end of the pull rod 707 is welded to the end pull plate 708, and the end pull plate 708 is welded to the concave rod 709.

[0069] When placing or removing a circuit board, the operator pulls outward the concave rod 709 on the corresponding placement portion 4. When the concave rod 709 is pulled outward, the pull rod 707 pulls the concave clamping member 713 inward and cancels its limit on the lower side of the clamping shaft 705. Thereafter, the placement portion 4 is rotated axially around the hinge shaft 701 to expose the placement portion 4 from the other placement portions 4, thereby facilitating the placement or removal of the circuit board.

[0070] Generally speaking, the following methods are used to place, transfer, and remove circuit boards.

[0071] In step 1, the operator disconnects one of the empty placement portions 4 from the moving portion 3 and rotates the placement portion 4 outward so as to rotate the placement portion 4 from above the moving portion 3 to one side thereof.

[0072] In step 2, the operator places one or more circuit boards to be debonded on the movable clamping mechanism 5 .

[0073] In step 3, the operator rotates the support plate 512 by the holding block 513 and clamps the circuit board by the clamping plate 527 on the clamping mechanism 5 .

[0074] In step 4, the operator moves the clamping mechanism 5 in step 2 upward, and places the other end of the circuit board in another clamping mechanism 5, and locks the clamping mechanism 5 in step 2 by rotating the eccentric pressure wheel 67. After that, the other end of the circuit board is clamped by the method described in step 3.

[0075] In step 5, the operator rotates the placement portion 4 so that it is located above the moving portion 3 and positions the clamping shaft 705 through the concave clamping piece 713 thereon.

[0076] Step 6: Place the circuit board to be debonded on the placement portion 4 in sequence according to steps 1 to 5 described above.

[0077] In step 7, the operator transfers the movable part 3 carrying multiple circuit boards to the turnover part 1. During the transfer, the card plate 207 must be moved downward first, and then the movable part 3 is transferred to the turnover part 1. After the transfer is in place, the extended shaft 31 is limited and locked by the card plate 207.

[0078] In step 8, the operator transfers the circuit board to the plasma degumming device through the turnover part 1, then cancels the connection between the turnover part 1 and the moving part 3, and pushes the moving part 3 and the circuit board thereon into the plasma degumming device to perform the degumming operation.

[0079] Step 9: Transfer the cleaned circuit boards to the turnover part 1 again, and take out the circuit boards one by one. The operation is completed.

[0080] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It is apparent that various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the present invention. Thus, the present invention is intended to encompass such modifications and variations as long as they fall within the scope of the claims and their equivalents.

Claims

1. A circuit board placement rack, characterized in that: The utility model comprises a rotating part (1), a moving part (3) is provided at the upper end of the rotating part (1), a plurality of placement parts (4) are provided on the moving part (3) along its length direction, a locking part (2) is provided on the rotating part (1), and the locking part (2) is connected to the moving part (3) and is used for locking the movement of the moving part (3); The placement portion (4) includes a pair of vertical connecting members (6), and a pair of clamping mechanisms (5) are provided on the vertical connecting members (6). The clamping mechanisms (5) are distributed up and down, and the clamping mechanism (5) at the upper end is movably provided on the vertical connecting member (6). The clamping mechanism (5) at the lower end is fixed to the lower end of the vertical connecting member (6). The clamping mechanism (5) at the lower end is provided with an opening and closing connecting member (7), and the opening and closing connecting member (7) is provided on the moving portion (3); The turnover portion (1) includes a rectangular bottom frame (10), a pair of end fixing plates (17) are respectively installed at both ends of the rectangular bottom frame (10) by screws, a universal wheel (11) is installed on the end fixing plate (17) by bolts, a pair of vertical rods (12) are respectively installed at both ends of the rectangular bottom frame (10) by screws, a rectangular top frame (13) is installed at the upper end of the vertical rod (12), a plurality of handles (15) are installed on the outer side of the rectangular top frame (13), a middle rod (14) is installed inside the rectangular top frame (13) by bolts, and a pair of guide rails (16) are installed at the upper end of the rectangular top frame (13), and the length direction of the guide rails (16) is parallel to the length direction of the rectangular top frame (13); The moving part (3) includes a pair of rectangular tubes (30), the length direction of the rectangular tubes (30) is parallel to the length direction of the rectangular top frame (13), end recesses (34) are installed at both ends of the rectangular tubes (30) by bolts, and a plurality of gripping holes (35) are provided on the end recesses (34), and a plurality of outward-extending shafts (31) are fixed to the outer wall of the rectangular tubes (30), and pulleys (32) are rotatably provided on the outward-extending shafts (31), and an annular groove (33) is provided on the outer periphery of the pulley (32), and the pulley (32) is slidably provided on the guide rail (16), and the bottom of the annular groove (33) is tangent to the upper end of the guide rail (16); The interlocking portion (2) includes a pair of guide rods (200) that are threaded onto the middle rod (14). The upper ends of the guide rods (200) are connected to concave fasteners (201) by threads. The concave fasteners (201) are fastened to the middle rod (14). A limiting ring (202) is formed on the guide rod (200). The limiting ring (202) is located on the lower side of the middle rod (14). An end cap (203) is provided at the lower end of the guide rod (200). A horizontal plate (205) is movably provided on the guide rod (200). A first elastic member is sleeved on the guide rod (200). Spring (204), the first spring (204) is located between the end cap (203) and the transverse plate (205), end arms (206) are formed at both ends of the transverse plate (205), the length direction of the end arms (206) is perpendicular to the length direction of the transverse plate (205), a plurality of clamping plates (207) are installed on the end arms (206), and a U-shaped clamping groove (208) is opened at the upper end of the clamping plate (207), and when the interlocking part (2) limits the movable part (3), the extended shaft (31) is clamped in the U-shaped clamping groove (208); A pair of lifting seats (209) are mounted on the lower wall of the horizontal plate (205) by screws, and an inclined hole (210) is opened on the lifting seat. There is an angle between the length direction of the inclined hole (210) and the vertical direction. A middle block (212) is movably provided between the lifting seats (209). The two ends of the middle block (212) are rotatably provided with a pressure rod (211) passing through the inclined hole (210). A pair of connecting rods (213) are connected to the middle block (212) by threads, and nuts (213) are connected to the connecting rods (213) by threads. 214), an end seat (217) is sleeved on the connecting rod (213), the upper end of the end seat (217) is mounted on one end of the rectangular top frame (13) by screws, a pair of guide sleeves (220) are welded on the inner side of the end seat (217), the connecting rod (213) is inserted into the guide sleeve (220), and the guide sleeve (220) is connected to the end cover (216) by a thread, the connecting rod (213) is inserted into the end cover (216), and the connecting rod (213) is sleeved with a second spring (215), The second spring (215) is located between the nut (214) and the end cover (216). The outer end of the connecting rod (213) is connected to a concave pull piece (221) through a thread. The concave pull piece (221) is located on the outer side of the end seat (217) and is rotatably provided with an outer pull rod (222). The two ends of the outer pull rod (222) are fixed with a swing arm (223) through a spline. The other end of the swing arm (223) is provided with a connecting end rod (224) on the outer side. A pair of side The plate (227) is provided with a slot (228) at the upper end of the side plate (227). When the extended shaft (31) is disconnected from the U-shaped slot (208), the connecting end rod (224) is inserted into the slot (228). The outer periphery of the outer pull rod (222) is welded with a limiting convex plate (225). A baffle (226) is welded on the concave pull piece (221). When the connecting end rod (224) is inserted into the slot (228), the baffle (226) is used to limit the rotation of the convex plate (225). A pair of L-shaped arms (218) are mounted on the end seat (217) by screws, and a holding rod (219) is fixed to the end of the L-shaped arms by a pair of nuts; The clamping mechanism (5) includes a groove-shaped member (500), a middle through-shaft (540) is welded at its middle position, and a long strip-shaped support plate (512) is rotatably provided on the middle through-shaft (540), the two sides of which in the width direction are planes, and the two ends in the length direction are arc surfaces, the arc surfaces at the two ends of the support plate (512) are rotationally symmetrical, and the center of the arc surface deviates from the geometric center position of the support plate (512) so that the two ends of the support plate (512) are wedge-shaped structures, and a gripping block (513) is formed at the outer end of the support plate (512), and the outer periphery of the support plate (512) is tangent to a pair of outer top wheels (510), the outer top wheels (510) are located on both sides of the support plate (512), and a connecting shaft (509) is provided on the outer top wheels (510); A fixed seat (501) is installed on the groove member (500), and a pair of guide pins (502) are connected to the fixed seat by threads. The inner end of the guide pin (502) is provided with a limit cap. A movable plate (504) is sleeved on the guide pin (502). A third spring (503) is sleeved on the guide pin (502). The third spring (503) is located between the movable plate (504) and the fixed seat (501). A concave movable plate (505) is welded on the movable plate (504). Rotating seats (506) are installed at both ends of the concave movable plate (505) by screws. An inner pressure wheel (507) is rotatably provided on the inner side of the rotating seat (506). A push-pull arm (508) is welded on the inner side of the concave movable plate (505). A connecting shaft (509) is rotatably provided on the inner end of the push-pull arm (508). A pair of clamping plates (527) are provided in the groove-shaped member (500), and a pair of outwardly extending convex plates (529) are provided on the outer walls of the clamping plates (527). The outwardly extending convex plates (529) are passed through both sides of the groove-shaped member (500). An inclined surface (530) is formed on the outer end of the outwardly extending convex plate (529), and an inner end of the inclined surface (530) extends inwardly. The outer periphery of the inner pressure wheel (507) is tangent to the outer end of the outwardly extending convex plate (529), and a compression spring (528) is fixed between the two ends of the clamping plate (527); The middle through shaft (540) includes an inner shaft (511) welded to the middle position of the groove-shaped member (500), a spline shaft (520) is formed on the outer end of the inner shaft (511), a screw is provided on the outer end of the spline shaft (520), and an end nut (521) is connected to the screw by a thread, a spline sleeve (525) is sleeved on the spline shaft (520), an end plate (523) is provided on the outer end of the spline sleeve (525), a plurality of wedge-shaped protrusions (524) are provided on the inner wall of the end plate (523) in a circumferential array, an inclined surface is formed on one side of the inner end of the wedge-shaped protrusion (524), a fourth spring (522) is sleeved on the spline shaft (520), the fourth spring (522) is located between the end nut (521) and the end plate (523), and a positioning rod (526) is provided on the outer periphery of the spline sleeve (525) perpendicular to its axial direction; A locking ring (514) is provided on the gripping block (513), and at least one pair of rotationally symmetrical embedded grooves (516) are provided on the locking ring (514), one side of the embedded groove (516) is a vertical plane, and the other side of the embedded groove (516) is an outer top inclined surface, and a plurality of bayonet holes (515) are formed at the outer end of the embedded groove (516), and the outer top inclined surface acts on the inclined surface to move the positioning rod (526) out of the bayonet hole (515), and when the wedge-shaped protrusion (524) passes through the embedded groove (516), the positioning rod (526) is locked in the bayonet hole (515); The opening and closing connecting member (7) includes a rotating convex plate (700) welded to one of the rectangular tubes (30), a hinge shaft (701) is provided at the upper end of the rotating convex plate (700), a rotating recess (702) is rotatably provided on the hinge shaft (701), and the rotating recess (702) is mounted on one end of a groove-shaped member (500) on the clamping mechanism (5) at the lower end by screws; A connecting convex plate (704) is welded to another rectangular tube (30), a clamping shaft (705) is provided at the upper end of the connecting convex plate (704), a concave clamping seat (703) is sleeved on the upper end of the connecting convex plate (704), an inner concave arc groove is opened at the lower end of the concave clamping seat (703), the clamping shaft (705) is passed through the inner concave arc groove, and the concave clamping seat (703) is mounted on the other end of the groove-shaped member (500) on the clamping mechanism (5) at the lower end by screws; The lower end of the connecting convex plate (704) is provided with a concave clamping piece (713), the upper wall of the concave clamping piece (713) is provided with an L-shaped groove, the clamping shaft (705) is located in the L-shaped groove, the inner end of the concave clamping piece (713) is installed with an inner pull plate (710) by screws, the upper end of the inner pull plate (710) is connected to a pair of guide rods (711) by threads, the inner end of the guide rods (711) is provided with an inner end cap, the guide rods (711) are provided with an inner vertical plate (706), the inner end cap is located on the inner vertical plate (706), and the inner end cap is located on the inner vertical plate (706). 06), the inner vertical plate (706) is mounted on the grooved member (500) on the clamping mechanism (5) at the lower end by screws, the guide rod (711) is provided with a fifth spring (712), the fifth spring (712) is located between the inner vertical plate (706) and the inner pull plate (710), the inner pull plate (710) is connected to a pull rod (707) by a thread, the other end of the pull rod (707) is welded to an end pull plate (708), and the end pull plate (708) is welded to a concave rod (709).

2. The circuit board placement rack according to claim 1, characterized in that: The vertical connecting member (6) includes a pair of lower end blocks (60), the lower end blocks (60) are mounted on the grooved member (500) on the clamping mechanism (5) at the lower end by screws, a vertical plate (61) is welded to the lower end block (60), an upper end block (62) is welded to the upper end of the vertical plate (61), a concave member (63) is mounted between the upper end blocks (62) by screws, a sliding sleeve (64) is sleeved on the vertical plate (61), and the sliding sleeve (64) is screwed. A grooved member (500) is mounted on the clamping mechanism (5) at the upper end, and a rotating protrusion (65) is formed on the inner side of the sliding sleeve (64). An inner pressure shaft (66) is rotatably provided on the rotating protrusion (65). Eccentric pressure wheels (67) are eccentrically provided at both ends of the inner pressure shaft (66). The outer periphery of the eccentric pressure wheel (67) is pressed tightly against the outer wall of the vertical plate (61). A holding end rod (68) is welded to the inner pressure shaft (66) perpendicular to its axial direction.

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