Material tension adjusting device for flat roller double cutting knife

Abstract

The application relates to a material tension adjusting device for a flat roller double cutter, and relates to the technical field of material tension adjusting devices, which comprises a shell plate and a U-shaped plate, a through hole is formed in the shell plate, an adjusting box is connected to the inside of the through hole, and a movable block is slidably connected to the inside of the adjusting box. The application is provided with a cooperation structure of a rotating rod, a screw rod and a screw cylinder. When the paper guide roller needs to be disassembled, the rotating rod is only needed to be rotated to drive the screw rod to rotate in the screw cylinder, the T-shaped positioning rod slides upwards along the contraction groove, the bottom end is separated from the positioning hole of the mounting block, the mounting block, the U-shaped plate and the paper guide roller can be pulled out from the mounting groove, the paper guide roller assembly can be quickly disassembled, when the mounting block is inserted into the mounting groove, the rotating rod is reversely rotated, the T-shaped positioning rod is lowered to be clamped into the positioning hole, and fixing is completed, the convenience of disassembling and replacing the paper guide roller assembly is effectively improved, and the problem that the existing device is difficult to disassemble due to the complex structure is solved.

Description

Technical Field

[0001] This application relates to a material tension regulating device, and more particularly to a material tension regulating device for a flat roller double cutter. Background Technology

[0002] Currently, the die-cutting industry offers various types of die-cutting equipment, including rotary die-cutting machines, flatbed die-cutting machines, and laser die-cutting machines. Among these, the rotary die-cutting machine, also known as a multi-station rotary die-cutting machine, is a type of die-cutting machine commonly called a circular die-cutting machine, roller die-cutting machine, or simply rotary die-cutting machine. It uses a continuously rotating roller cutter for die-cutting, with the workpiece being fed continuously and uninterruptedly during operation. Its advantages include high efficiency and the ability to process products with complex processes such as multi-layer material composites and waste removal. However, it also suffers from problems such as significant material waste during machine setup, unstable dimensional alignment during startup, expensive cutting tools, and relatively low precision. A flatbed die-cutting machine is a device capable of punching and cutting workpieces. During processing, the workpiece must be stationary relative to the machine. Its advantages include high precision, low tooling cost, and the ability to die-cut special materials. However, it cannot handle complex processes such as multi-layered material lamination, die-cutting, re-lamination, and re-die-cutting. Some products processed by rotary die-cutting machines require the use of a flatbed die. Traditionally, when using a flatbed die to punch and cut a workpiece, the workpiece must be stationary, which conflicts with the continuous feeding process of a rotary die-cutting machine. Therefore, continuous punching and die-cutting can only be achieved through an intermediate material storage mechanism. The overall structure is relatively complex, and the production process is not continuous.

[0003] A current patent (publication number: CN214446938U) discloses a tension adjustment mechanism for a multi-functional composite film cutting machine. This mechanism includes a flatbed die-cutting machine intermittently feeding the processed roll material to a guide roller assembly. A servo motor drives a transmission assembly, which, under the action of the transmission assembly, reciprocates linearly along a sliding assembly in the vertical direction. This compensates for the tension between the flatbed and rotary die-cutting machines, enabling continuous feeding by the rotary die-cutting machine. In this invention, the tension adjustment mechanism ensures continuous operation of the flatbed and rotary die-cutting machines during production, allowing for simultaneous punching and die-cutting operations on the same workpiece, resulting in high production efficiency and a simple structure.

[0004] While the device in the aforementioned comparative document solves the problem of not being able to perform punching and die-cutting operations on the same workpiece simultaneously, it lacks a disassembly function. During use, the guide roller assembly cannot be quickly disassembled and replaced. When the guide roller is worn, contaminated with impurities, or needs to be adapted to materials of different specifications, operators need to spend a lot of time disassembling and installing it, which affects the equipment maintenance efficiency and production continuity. To solve the above problems, a material tension adjustment device for a flat roller double cutter is proposed. Utility Model Content

[0005] The purpose of this application is to provide a material tension adjustment device for a flat roller with double cutters, which has the advantages of easy disassembly and solves the problem that the guide roller assembly in the existing tension adjustment device is difficult to disassemble and replace quickly.

[0006] The material tension adjustment device for a flat roller double cutter provided in this application adopts the following technical solution: it includes a shell plate and a U-shaped plate. The shell plate has a through hole inside, and an adjustment box is installed and connected inside the through hole. A movable block is slidably connected inside the adjustment box. A sliding hole is opened on the side of the adjustment box. The movable block is slidably connected to the side of the sliding hole and is fixedly connected to a lifting block. The lifting block has an internal mounting groove, and the top of the mounting groove has a shrinkage groove. A paper guide roller is rotatably connected to the inside of the U-shaped plate via a bearing. An mounting block is fixedly connected to the side of the U-shaped plate. The mounting block is close to the mounting groove and has a positioning hole inside. A rotating rod is tightly nested inside the top of the shrinkage groove via a bearing. A screw is fixedly connected to the bottom of the rotating rod. A T-shaped positioning rod is slidably connected inside the shrinkage groove. The bottom of the T-shaped positioning rod slides through the bottom of the shrinkage groove and is engaged in the positioning hole. A screw cylinder is fixedly connected inside the T-shaped positioning rod, and the bottom of the screw is threaded into the screw cylinder. By adopting the above technical solution and setting up a cooperative structure of rotating rod, screw, and screw barrel, when the guide roller needs to be disassembled, simply rotate the rotating rod to drive the screw to rotate inside the screw barrel, causing the T-shaped positioning rod to slide upward along the shrinkage groove. Its bottom end disengages from the positioning hole of the mounting block, allowing the mounting block, along with the U-shaped plate and the guide roller, to be pulled out of the mounting groove. This enables quick disassembly of the guide roller assembly. During installation, insert the mounting block into the mounting groove and rotate the rotating rod in the opposite direction to move the T-shaped positioning rod downward and engage it in the positioning hole, thus completing the fixation. This effectively improves the convenience of disassembling and replacing the guide roller assembly and solves the problem of difficult disassembly caused by the complex structure in existing devices.

[0007] Preferably, a transmission rod is tightly nested inside the shrinkage groove via a bearing, a second worm is fixedly connected to the surface of the transmission rod, a second worm wheel is fixedly connected to the surface of the rotating rod, the second worm and the second worm wheel mesh with each other, one end of the transmission rod rotates through the side of the shrinkage groove and is fixedly connected to a knob; By adopting the above technical solution and setting up a cooperative structure of transmission rod, second worm, second worm wheel and knob, the position of rotation operation can be transferred from the rotating rod to the knob. This makes it easier and less strenuous for the operator to apply force when rotating. When disassembly or installation is required, simply turn the knob to drive the second worm to rotate through the transmission rod, which in turn drives the meshing second worm wheel and rotating rod to rotate synchronously, ultimately realizing the lifting and lowering action of the T-shaped positioning rod.

[0008] Preferably, a rotary motor is fixedly connected to the side of the adjustment box, the output end of the rotary motor rotates through the side of the adjustment box, and is fixedly connected to a first worm gear; By adopting the above technical solution and setting up a drive structure for a rotary motor and a first worm gear, a power source can be provided for tension adjustment.

[0009] Preferably, a rotating shaft is tightly nested inside the top of the adjustment box via a bearing, a threaded rod is fixedly connected to the bottom of the rotating shaft, a first worm is fixedly connected to the surface of the rotating shaft, the first worm wheel and the first worm mesh with each other, and a threaded cylinder is fixedly connected inside the movable block, the threaded cylinder being threadedly connected to the surface of the threaded rod. By adopting the above technical solution and setting up a transmission structure of rotating shaft, first worm, threaded rod and threaded cylinder, the power of the rotary motor can be converted into the linear motion of the moving block. When the rotary motor starts, its output end drives the first worm wheel to rotate, which in turn drives the first worm and rotating shaft to rotate synchronously. When the threaded rod rotates with the rotating shaft, it can push the threaded cylinder and moving block to move along the axial direction of the threaded rod through the threaded engagement, thereby realizing the position adjustment of the material tension adjustment component and providing a stable displacement basis for tension control.

[0010] Preferably, a fixing plate is fixedly connected inside the adjustment box, and multiple limiting rods are fixedly connected between the bottom of the fixing plate and the bottom of the adjustment box. Multiple sliding cylinders are fixedly connected inside the movable block, and the sliding cylinders are slidably connected to the surface of the limiting rods. By adopting the above technical solution and setting a guide structure of fixed plate, limit rod and slide cylinder, the movement direction of the movable block can be limited. When the movable block moves axially under the drive of the threaded rod, the slide cylinder will slide synchronously along the limit rod, which can prevent the movable block from rotating or deviating during the displacement process and ensure that the movable block always maintains a stable linear motion trajectory.

[0011] Preferably, a herringbone frame is fixedly connected to the front of the adjustment box, the through hole is located inside the herringbone frame, and the lifting block is slidably connected inside the herringbone frame; By adopting the above technical solution and setting up a loop frame, installation space can be provided for the subsequent dustproof structure.

[0012] Preferably, telescopic folding plates are fixedly connected to the top and bottom of the inner side of the spiral frame, and one side of each of the two telescopic folding plates is fixedly connected to the top and bottom of the lifting block, respectively. By adopting the above technical solution and setting a telescopic folding plate, the lifting block can be expanded or retracted simultaneously as it slides up and down along the loop frame, thereby forming a dynamic seal between the loop frame and the lifting block, which can prevent external dust, debris and other impurities from entering the adjustment box through the through hole.

[0013] Preferably, sliding rods are fixedly connected to both sides inside the herringbone frame, and multiple sliding plates are fixedly connected to the side of the telescopic folding plate, with the sliding plates slidably connected to the surface of the sliding rods; By adopting the above technical solution and setting the cooperative structure of the sliding rod and the sliding plate, the unfolding and retraction process of the telescopic folding plate can be guided and limited. When the lifting block moves the telescopic folding plate, the sliding plate will slide smoothly along the sliding rod, thereby ensuring that the telescopic folding plate always maintains a regular folding shape and avoiding deviation or jamming during the movement.

[0014] In summary, this application includes at least one of the following beneficial technical effects: This material tension adjustment device for a flat roller double cutter, through the cooperative structure of a rotating rod, a screw, and a screw barrel, allows for quick disassembly of the guide roller assembly when the rotating rod needs to be removed. Rotating the rotating rod causes the screw to rotate within the screw barrel, causing the T-shaped positioning rod to slide upwards along the shrinkage groove. Its bottom end disengages from the positioning hole of the mounting block, allowing the mounting block, along with the U-shaped plate and the guide roller, to be pulled out of the mounting groove. During installation, the mounting block is inserted into the mounting groove, and the rotating rod is rotated in the opposite direction, causing the T-shaped positioning rod to move downwards and engage with the positioning hole, thus completing the fixation. This effectively improves the convenience of disassembling and replacing the guide roller assembly, solving the problem of difficult disassembly caused by the complex structure of existing devices. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural diagram of this application; Figure 2 This is a side-view perspective three-dimensional structural diagram of this application; Figure 3 This is a structural schematic diagram of the cross-section of the adjustment box in this application; Figure 4 This is a schematic diagram of the positioning groove in this application; Figure 5 This is a schematic diagram of the cross-section of the L-shaped rotating ring in this application.

[0016] In the diagram: 1. Shell plate; 101. Through hole; 2. Adjustment box; 201. Rotary motor; 202. First worm gear; 203. Rotating shaft; 204. First worm; 205. Threaded rod; 206. Threaded cylinder; 207. Movable block; 208. Sliding hole; 209. Fixed plate; 2010. Limiting rod; 2011. Sliding cylinder; 3. Lifting block; 301. Mounting groove; 302. Shrinking groove; 303. Rotating rod; 304. Screw; 305. T-shaped positioning rod; 306. Screw cylinder; 307. Second worm gear; 308. Transmission rod; 309. Second worm; 3010. Knob; 4. U-shaped plate; 401. Guide roller; 402. Mounting block; 403. Positioning hole; 5. Recurve frame; 501. Telescopic folding plate; 502. Sliding rod; 503. Slide plate. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0018] Example 1: A material tension regulating device for a flat roller double cutter, referring to... Figure 1 , Figure 2 , Figure 3 and Figure 5 It includes a shell plate 1 and a U-shaped plate 4. The shell plate 1 has a through hole 101 inside. An adjustment box 2 is installed and connected inside the through hole 101. A movable block 207 is slidably connected inside the adjustment box 2. A sliding hole 208 is opened on the side of the adjustment box 2. The movable block 207 is slidably connected to the sliding hole 208 on the side and is fixedly connected to a lifting block 3. The lifting block 3 has an installation groove 301 inside, and a shrinkage groove 302 is formed at the top of the installation groove 301. A paper guide roller 401 is rotatably connected to the inside of the U-shaped plate 4 via a bearing. An installation block 402 is fixedly connected to the side of the U-shaped plate 4, and the installation block 402 is close to the installation groove 301. A positioning hole 403 is formed inside the installation block 402. A rotating rod 303 is tightly nested at the top of the shrinkage groove 302 via a bearing. A screw 304 is fixedly connected to the bottom of the rotating rod 303. A T-shaped positioning rod 305 is slidably connected inside the shrinkage groove 302. The bottom of the T-shaped positioning rod 305 slides through the bottom of the shrinkage groove 302 and is engaged with the... Inside the positioning hole 403, a screw cylinder 306 is fixedly connected to the T-shaped positioning rod 305. The bottom end of the screw 304 is threaded into the screw cylinder 306. By setting up the cooperative structure of the rotating rod 303, the screw 304, and the screw cylinder 306, when it is necessary to disassemble the paper guide roller 401, simply rotate the rotating rod 303 to drive the screw 304 to rotate inside the screw cylinder 306, causing the T-shaped positioning rod 305 to slide upward along the shrink groove 302. Its bottom end disengages from the positioning hole 403 of the mounting block 402, allowing the mounting block 402, along with the U-shaped plate 4 and the paper guide roller 401, to be pulled out from the mounting groove 301. This enables quick disassembly of the paper guide roller 401 assembly. For quick disassembly and installation, insert the mounting block 402 into the mounting slot 301, rotate the rotating rod 303 in the opposite direction to move the T-shaped positioning rod 305 down and engage it with the positioning hole 403, thus completing the fixation. This effectively improves the ease of disassembly and replacement of the guide roller 401 assembly and solves the problem of difficult disassembly caused by the complex structure in existing devices. The inner side of the shrink groove 302 is tightly nested with a transmission rod 308 through bearings. A second worm gear 309 is fixedly connected to the surface of the transmission rod 308, and a second worm wheel 307 is fixedly connected to the surface of the rotating rod 303. The second worm gear 309 and the second worm wheel 307 mesh with each other. One end of the transmission rod 308 rotates through the shrink groove 302. A knob 3010 is fixedly connected to the side of the groove 302. By setting up a cooperative structure of transmission rod 308, second worm 309, second worm wheel 307 and knob 3010, the position of rotation operation can be transferred from the rotating rod 303 to the knob 3010. This makes it easier and less strenuous for the operator to apply force when rotating. When disassembly or installation is required, simply turn the knob 3010, and the transmission rod 308 will drive the second worm 309 to rotate, thereby driving the second worm wheel 307 and the rotating rod 303 to rotate synchronously. Finally, the lifting and lowering action of the T-shaped positioning rod 305 can be realized.

[0019] Please see Figure 5A rotary motor 201 is fixedly connected to the side of the adjustment box 2. The output end of the rotary motor 201 rotates through the side of the adjustment box 2 and is fixedly connected to a first worm gear 202. By setting the drive structure of the rotary motor 201 and the first worm gear 202, a power source can be provided for tension adjustment. A rotating shaft 203 is tightly nested inside the top of the adjustment box 2 via a bearing. A threaded rod 205 is fixedly connected to the bottom of the rotating shaft 203. A first worm 204 is fixedly connected to the surface of the rotating shaft 203. The first worm gear 202 and the first worm 204 mesh with each other. A threaded cylinder 206 is fixedly connected inside the movable block 207. The threaded cylinder 206 is threadedly connected to the threaded rod 205. 5. By setting a transmission structure of rotating shaft 203, first worm 204, threaded rod 205 and threaded cylinder 206, the power of rotary motor 201 can be converted into linear motion of movable block 207. When rotary motor 201 starts, its output end drives first worm wheel 202 to rotate, which in turn drives first worm 204 and rotating shaft 203 to rotate synchronously. When threaded rod 205 rotates with rotating shaft 203, it can push threaded cylinder 206 and movable block 207 to move axially along threaded rod 205 through threaded engagement, thereby realizing the position adjustment of material tension adjustment component, which can provide a stable displacement basis for tension control.

[0020] Please see Figure 4 A fixed plate 209 is fixedly connected inside the adjustment box 2. Multiple limiting rods 2010 are fixedly connected between the bottom of the fixed plate 209 and the bottom of the adjustment box 2. Multiple sliding cylinders 2011 are fixedly connected inside the movable block 207. The sliding cylinders 2011 are slidably connected to the surface of the limiting rods 2010. By setting the guide structure of the fixed plate 209, the limiting rods 2010 and the sliding cylinders 2011, the movement direction of the movable block 207 can be limited. When the movable block 207 moves axially under the drive of the threaded rod 205, the sliding cylinders 2011 will slide synchronously along the limiting rods 2010. This can prevent the movable block 207 from rotating or deviating during the displacement process and ensure that the movable block 207 always maintains a stable linear motion trajectory.

[0021] Please see Figure 3 and Figure 4The front of the adjustment box 2 is fixedly connected to a U-shaped frame 5, and the through hole 101 is located inside the U-shaped frame 5. The lifting block 3 is slidably connected inside the U-shaped frame 5. By setting the U-shaped frame 5, installation space can be provided for the subsequent dustproof structure. The top and bottom of the inside of the U-shaped frame 5 are fixedly connected to telescopic folding plates 501. One side of each of the two telescopic folding plates 501 is fixedly connected to the top and bottom of the lifting block 3, respectively. By setting the telescopic folding plates 501, the lifting block 3 can be simultaneously expanded or retracted when it slides up and down along the U-shaped frame 5, thereby forming a dynamic seal between the U-shaped frame 5 and the lifting block 3, which can prevent external dust, debris and other impurities from passing through the through hole 101. 01. Entering the interior of the adjustment box 2, slide rods 502 are fixedly connected to both sides of the inner side of the U-shaped frame 5. Multiple slide plates 503 are fixedly connected to the side of the telescopic folding plate 501. The slide plates 503 are slidably connected to the surface of the slide rods 502. By setting the cooperative structure of the slide rods 502 and the slide plates 503, the telescopic folding plate 501 can be guided and limited in its unfolding and retraction process. When the lifting block 3 moves the telescopic folding plate 501, the slide plates 503 will slide smoothly along the slide rods 502, thereby ensuring that the telescopic folding plate 501 always maintains a regular folded shape and can avoid deviation or jamming during movement.

[0022] The implementation principle of this application embodiment is as follows: In actual application, the device is first installed in the material conveying path of the flat roller double cutter equipment so that the material bypasses the surface of the guide roller 401. When it is necessary to adjust the material tension, the rotary motor 201 is started, and its output end can drive the first worm gear 202 to rotate. Through the meshing transmission between the first worm gear 202 and the first worm 204, the rotating shaft 203 and the threaded rod 205 can be driven to rotate synchronously. The threaded rod 205, through the threaded engagement with the threaded cylinder 206 and the limiting rod 2010 and the sliding cylinder 2011, can drive the movable block 207 to move linearly along the inside of the adjusting box 2, which can drive the lifting block 3 to move up and down, thereby changing the position and height of the guide roller 401, thereby adjusting the tension of the material. During this process, the telescopic folding plate 501 inside the loop frame 5 unfolds or retracts as the lifting block 3 moves, and the slide plate 503 slides along the slide rod 502, which can ensure that the telescopic folding plate 501 stably seals the gap between the loop frame 5 and the lifting block 3, and can prevent impurities from entering the interior of the adjustment box 2. When the guide roller 401 needs maintenance or replacement, the operator turns the knob 3010 to rotate the transmission rod 308 and the second worm gear 309. Through the engagement of the second worm gear 309 and the second worm wheel 307, the rotating rod 303 and the screw 304 can be rotated. The screw 304 rotates in the screw barrel 306, which can drive the T-shaped positioning rod 305 to move upward along the shrink groove 302. Its bottom end disengages from the positioning hole 403 of the mounting block 402. Then, the mounting block 402, along with the U-shaped plate 4 and the guide roller 401, can be pulled out from the mounting groove 301 to complete the disassembly. The installation is done in reverse. After inserting the mounting block 402 into the mounting groove 301, the knob 3010 is turned to move the T-shaped positioning rod 305 downward and lock it into the positioning hole 403 to achieve fixation. The whole process is quick and convenient, which can improve the efficiency of equipment maintenance.

Claims

1. A material tension adjusting device for a flat roller double cutter, comprising a shell plate (1) and a U-shaped plate (4), characterized in that: The shell plate (1) has a through hole (101) inside, and an adjustment box (2) is installed and connected inside the through hole (101). A movable block (207) is slidably connected inside the adjustment box (2). A sliding hole (208) is opened on the side of the adjustment box (2). The movable block (207) is slidably connected to the sliding hole (208) on the side and is fixedly connected to a lifting block (3). The lifting block (3) has an installation groove (301) inside, and a shrinkage groove (302) is provided at the top of the installation groove (301). A paper guide roller (401) is rotatably connected to the inside of the U-shaped plate (4) through a bearing. An installation block (402) is fixedly connected to the side of the U-shaped plate (4). The installation block (402) is close to the installation groove (301). A positioning hole (403) is provided inside the installation block (402). The top of the shrinkage groove (302) is connected to a shaft. A rotating rod (303) is tightly nested inside the shrinkage groove (302), and a screw (304) is fixedly connected to the bottom end of the rotating rod (303). A T-shaped positioning rod (305) is slidably connected inside the shrinkage groove (302). The bottom end of the T-shaped positioning rod (305) slides through the bottom of the shrinkage groove (302) and is engaged in the positioning hole (403). A screw cylinder (306) is fixedly connected inside the T-shaped positioning rod (305), and the bottom end of the screw (304) is threadedly connected inside the screw cylinder (306).

2. The material tension adjusting device for a flat roller double cutter according to claim 1, characterized in that: The inner side of the shrinkage groove (302) is tightly nested with a transmission rod (308) via a bearing. A second worm (309) is fixedly connected to the surface of the transmission rod (308). A second worm wheel (307) is fixedly connected to the surface of the rotating rod (303). The second worm (309) and the second worm wheel (307) mesh with each other. One end of the transmission rod (308) rotates through the side of the shrinkage groove (302) and is fixedly connected to a knob (3010).

3. The material tension adjusting device for a flat roller double cutter according to claim 1, characterized in that: A rotary motor (201) is fixedly connected to the side of the adjustment box (2). The output end of the rotary motor (201) rotates through the side of the adjustment box (2) and is fixedly connected to a first worm gear (202).

4. The material tension adjusting device for a flat roller double cutter according to claim 3, characterized in that: The top of the adjustment box (2) is tightly nested with a rotating shaft (203) through a bearing. The bottom of the rotating shaft (203) is fixedly connected to a threaded rod (205). The surface of the rotating shaft (203) is fixedly connected to a first worm (204). The first worm wheel (202) meshes with the first worm (204). The movable block (207) is fixedly connected to a threaded cylinder (206), which is threadedly connected to the surface of the threaded rod (205).

5. The material tension adjusting device for a flat roller double cutter according to claim 1, characterized in that: The adjustment box (2) is fixedly connected to a fixing plate (209). Multiple limiting rods (2010) are fixedly connected between the bottom of the fixing plate (209) and the bottom of the adjustment box (2). Multiple sliding cylinders (2011) are fixedly connected inside the movable block (207). The sliding cylinders (2011) are slidably connected to the surface of the limiting rods (2010).

6. The material tension adjusting device for a flat roller double cutter according to claim 1, characterized in that: The front of the adjustment box (2) is fixedly connected to a spiral frame (5), the through hole (101) is located inside the spiral frame (5), and the lifting block (3) is slidably connected inside the spiral frame (5).

7. The material tension adjusting device for a flat roller double cutter according to claim 6, characterized in that: The top and bottom of the inner edge of the spiral frame (5) are fixedly connected to telescopic folding plates (501), and one side of each of the two telescopic folding plates (501) is fixedly connected to the top and bottom of the lifting block (3).

8. The material tension adjusting device for a flat roller double cutter according to claim 7, characterized in that: The inside of the spiral frame (5) is fixedly connected to sliding rods (502) on both sides, and multiple sliding plates (503) are fixedly connected to the side of the telescopic folding plate (501). The sliding plates (503) are slidably connected to the surface of the sliding rods (502).

Images