Stable conveying equipment for lighting fixture production

Abstract

The invention provides stable conveying equipment for lighting fixture production, and relates to the technical field of lighting fixture production. Two adjusting frame plates are installed at the top end of the bottom frame in a threaded mode, the two ends of each adjusting frame plate are each provided with a limiting rotating hole, the limiting rotating holes in the two ends of each adjusting frame plate are each rotationally provided with a driving roller shaft, a driving motor is fixedly installed at the outer end of the left side of the bottom frame, and a cleaning brush is fixedly arranged at the inner end of a cleaning block. The distance between the lamp holder grooves between the two sets of conveying belts can be conveniently adjusted according to the specification and size of a lamp holder on a lighting appliance, so that the top end of the lighting appliance can be conveniently placed upwards, and workers in different procedures can conveniently observe and take the lighting appliance; a cleaning brush of the device can automatically brush away dust and dirt on the surface of the conveying belt while the conveying belt is in transmission; the problems that the adjustability of the device is poor, and the conveying effect of the device on the lighting devices is easily affected due to excessive dust on the surface after a conveying belt is used for conveying are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting fixture production, and in particular to a lighting fixture production stable transmission device. Background Art

[0002] The production of lighting fixtures is divided into multiple processes, and during the production process of lighting fixtures, the lighting fixtures need to be transported to the next process to improve the production efficiency of the equipment; as for the currently existing stable transmission equipment for lighting fixture production, the adjustability of the device is poor. When the device is transmitting the lighting fixture, it is not easy for the lighting fixture to be placed with the top of the lighting fixture facing upward under the action of the lamp holder's own gravity to facilitate the observation and picking up of the lighting fixture by personnel in different processes. In addition, too much dust on the surface of the conveyor belt after use can easily affect the transmission effect of the device on the lighting fixture. At the same time, the device is not easy to automatically brush off the dust and dirt on the surface of the conveyor belt while the conveyor belt is transmitting. Summary of the invention

[0003] In view of this, the present invention provides a stable transmission device for the production of lighting fixtures, which has an adjustment frame plate, so that the spacing between the lamp holder grooves between the two groups of conveyor belts thereon can be easily adjusted according to the specifications and dimensions of the lamp holders on the lighting fixtures, so that the top of the lighting fixtures can be placed upwards, which is convenient for personnel in different processes to observe and take the lighting fixtures, improves work efficiency, and the device has better adjustable performance.

[0004] The present invention provides a purpose and effect of a lighting fixture production stable transmission device, specifically including a base frame;

[0005] The top end of the base frame is threadedly installed with two groups of adjusting frame plates, and two groups of limiting rotating holes are respectively opened at two ends of the adjusting frame plates, and a group of driving roller shafts are respectively rotatably installed on the limiting rotating holes at two ends of the adjusting frame plates, and a group of limiting columns are fixedly provided at the outer ends of the driving roller shafts, and a group of conveyor belts are respectively driven and installed on the driving roller shafts at two ends of the adjusting frame plates, a group of driving motors are fixedly installed at the left outer end of the base frame, and a group of transmission rods are also rotatably installed at the front end of the base frame, and a group of vacuum cleaners are also fixedly installed at the left end of the conveyor belt, a group of telescopic tubes are connected to the top of the vacuum cleaner, and a group of dust suction boxes are installed at the outer ends of the telescopic tubes, and a group of movable plates are also slidably installed on the left end of the base frame, and a group of cleaning blocks are clamped and installed on the top of the movable plates, and a cleaning brush is fixedly provided at the inner end of the cleaning blocks.

[0006] Furthermore, partitions are fixedly installed at equal intervals on the outer surface of the conveyor belt, and between the two groups of conveyor belts is a lamp holder groove, and the lamp holder at the bottom end of the lighting fixture is inserted and installed on the lamp holder groove between the two groups of conveyor belts.

[0007] Furthermore, a group of turntables are fixedly installed on the bottom end of the transmission rod, a group of drive shafts are fixedly installed on the outer side of the bottom of the turntable, a group of drive slot plates are fixedly installed on the front end of the bottom of the movable plate, a group of drive slots are opened on the drive slot plates, and the drive shafts on the outer side of the bottom of the turntable are slidably installed on the drive slots opened on the drive slot plates.

[0008] Furthermore, a group of first bevel gears are fixedly mounted on the spline shaft, a group of second bevel gears are fixedly mounted on the top of the transmission rod, and the first bevel gears on the spline shaft are meshed and transmission-connected with the second bevel gears on the top of the transmission rod.

[0009] Furthermore, a set of double-headed screws are rotatably installed on the left end of the base frame, a set of threaded holes are opened on the left end of the adjustment frame plate, and the threaded holes opened on the left ends of the two sets of adjustment frame plates are respectively threadedly installed on the two ends of the double-headed screws at the left end of the base frame.

[0010] Furthermore, a group of mounting grooves are opened on the movable plate, a group of dust suction vents are opened at the inner end of the dust collection box, the dust suction vents are placed at the bottom end of the cleaning brush on the cleaning block, and the dust collection box is snap-fitted and installed on the mounting grooves of the movable plate.

[0011] Furthermore, a group of spline shafts are rotatably installed at both ends of the base frame, a group of spline grooves are opened on the driving roller shaft, the outer end of the spline shaft is fixedly installed on the transmission shaft of the driving motor, and the spline grooves opened on the driving roller shaft are slidably installed on the spline shafts at both ends of the base frame.

[0012] Furthermore, a group of positioning grooves are opened at the left end of the cleaning block, a group of positioning blocks are fixedly provided at the top of the movable plate, and the positioning grooves opened at the left end of the cleaning block are clamped and installed on the positioning blocks at the top of the movable plate and fixed together by bolts.

[0013] Furthermore, a group of guide grooves are opened at the left end of the base frame, a group of guide blocks are fixedly installed on the inner side of the bottom of the movable plate, and the guide blocks fixedly installed on the inner side of the bottom of the movable plate are slidably installed on the guide grooves opened at the left end of the base frame.

[0014] Furthermore, a group of guide rods are fixedly installed on the right end of the base frame, a group of guide holes are opened on the right end of the adjustment frame plate, and the guide holes on the right ends of the two groups of adjustment frame plates are respectively slidably installed on the guide rods on the right end of the base frame.

[0015] The lighting fixture production stable transmission device provided by the present invention has the following beneficial effects:

[0016] By rotating the double-headed screw, the spacing between the lamp holder grooves between the two groups of conveyor belts can be easily adjusted according to the specifications of the lamp holders on the lighting fixtures, so that the top of the lighting fixture can be placed upwards, which is convenient for personnel in different processes to observe and take the lighting fixtures, improves work efficiency, and the device has better adjustable performance; and while the conveyor belt of the device is driven, the cleaning brush of the device can automatically brush off dust and dirt on the surface of the conveyor belt to avoid excessive dust on the surface of the conveyor belt after use, which affects the transmission effect of the device on the lighting fixture, and the cleaning block of the device is easy to disassemble and assemble quickly, and cooperates with the dust suction vents opened at the inner end of the dust collection box to further improve the cleaning effect of the device on the dust on the surface of the conveyor belt.

[0017] The two adjusting frames are respectively threadedly installed on the two ends of the double-headed screw rod at the left end of the base frame through the guide holes at the right ends of the two adjustment frames, and the threaded holes at the left ends of the two adjustment frames are respectively threadedly installed on the two ends of the double-headed screw rod at the left end of the base frame. By rotating the double-headed screw rod, the two adjustment frames are threadedly installed on the double-headed screw rod at the same time. The spacing of the lamp holder grooves between the two groups of conveyor belts thereon is convenient for adjustment according to the specifications of the lamp holder on the lighting fixture. The lamp holder at the bottom end of the lighting fixture is plugged and installed on the lamp holder groove between the two groups of conveyor belts, so that the top end of the lighting fixture can be placed upward, which is convenient for personnel in different process steps to observe and take the lighting fixture, and improves work efficiency. The device has better adjustable performance, and the spline grooves on the driving roller shaft are respectively slidably installed on the spline shafts at both ends of the base frame, so that when the two groups of adjustment frames are adjusted, the driving motor can always drive the conveyor belt transmission on the driving roller shaft through the spline shaft.

[0018] The transmission gear of the present invention is a gear that is engaged with the first gear of the driving member and the gear of the driving member is engaged with the gear of the driving member, and the gear of the driving member is engaged with the gear of the driving member, thereby the gear of the driving member is engaged with the gear of the driving member, and the gear of the driving member is engaged with the gear of the driving member, thereby the gear of the driving member is engaged with the gear of the driving member, and the gear of the driving member is engaged with the gear of the driving member, BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture:

[0022] Figure 1 It is a front axial schematic diagram of a lighting fixture production stable transmission device of the present invention.

[0023] Figure 2 It is a schematic diagram of disassembly and assembly of a conveyor belt of a lighting fixture production stable transmission device of the present invention.

[0024] Figure 3 It is a schematic diagram of disassembling and assembling an adjustment frame plate of a lighting fixture production stable transmission device of the present invention.

[0025] Figure 4 It is a schematic diagram of the split outer end of the adjustment frame plate of the lighting fixture production stable transmission equipment of the present invention.

[0026] Figure 5 It is a schematic diagram of the installation of the dust collection box of the lighting fixture production stable transmission equipment of the present invention.

[0027] Figure 6 It is a schematic diagram of the installation of the transmission rod of the lighting fixture production stable transmission equipment of the present invention.

[0028] Figure 7 It is a schematic diagram of the installation of a mobile plate of a lighting fixture production stable transmission device of the present invention.

[0029] Figure 8 It is a schematic diagram of disassembling and assembling a cleaning block of a lighting fixture production stable transmission device of the present invention.

[0030] Reference numerals list

[0031] 1. Base frame; 101. Guide rod; 102. Double-headed screw; 103. Spline shaft; 1031. First bevel gear; 1032. Drive motor; 104. Guide groove; 105. Transmission rod; 1051. Second bevel gear; 1052. Turntable; 1053. Drive shaft; 2. Adjustment frame plate; 201. Guide hole; 202. Threaded hole; 203. Limiting rotating hole; 204. Drive roller shaft; 2041. Limiting column; 2042. Spline groove; 3. Conveyor belt; 301. Partition plate; 4. Vacuum cleaner; 401. Telescopic tube; 402. Dust box; 4021. Dust suction vent; 5. Moving plate; 501. Mounting groove; 502. Guide block; 503. Positioning block; 504. Drive groove plate; 6. Cleaning block; 601. Cleaning brush; 602. Positioning groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0033] Please refer to Figures 1 to 8 As shown:

[0034] Embodiment 1: The present invention provides a lighting fixture production stable transmission device, including a base frame 1;

[0035] Two groups of adjusting frames 2 are threadedly installed on the top of the base frame 1, and a group of limiting rotating holes 203 are respectively opened at both ends of the adjusting frames 2. A group of driving roller shafts 204 are rotatably installed on the limiting rotating holes 203 at both ends of the adjusting frames 2, and a group of limiting columns 2041 are fixedly installed on the outer ends of the driving roller shafts 204, and a group of conveyor belts 3 are driven and installed on the driving roller shafts 204 at both ends of the adjusting frames 2. A group of driving motors 1032 are fixedly installed on the left outer end of the base frame 1, and a group of transmission rods 105 are also rotatably installed on the front end of the base frame 1. A group of vacuum cleaners 4 are also fixedly installed on the left end of the conveyor belt 3, and a group of telescopic tubes 401 are connected to the top of the vacuum cleaner 4, and a group of dust boxes 402 are installed on the outer ends of the telescopic tubes 401. A group of moving plates 5 are also slidably installed on the left end of the base frame 1, and a group of cleaning blocks 6 are clamped and installed on the top of the moving plates 5, and a cleaning brush 601 is fixedly provided at the inner end of the cleaning blocks 6.

[0036] Among them, Figures 2 to 4As shown, a group of guide rods 101 are fixedly installed on the right end of the base frame 1, a group of guide holes 201 are opened at the right end of the adjustment frame plate 2, and the guide holes 201 at the right ends of the two groups of adjustment frame plates 2 are respectively slidably installed on the guide rods 101 at the right end of the base frame 1, a group of double-headed screws 102 are rotatably installed on the left end of the base frame 1, a group of threaded holes 202 are opened at the left end of the adjustment frame plate 2, and the threaded holes 202 opened at the left ends of the two groups of adjustment frame plates 2 are respectively threadedly installed on the two ends of the double-headed screw 102 at the left end of the base frame 1, and the two ends of the base frame 1 are also A group of spline shafts 103 are rotatably installed respectively, a group of spline grooves 2042 are opened on the driving roller shaft 204, the outer end of the spline shaft 103 is fixedly installed on the transmission shaft of the driving motor 1032, and the spline grooves 2042 opened on the driving roller shaft 204 are slidably installed on the spline shafts 103 at both ends of the bottom frame 1, and the outer surface of the conveyor belt 3 is equidistantly fixed with partitions 301, and there is a lamp holder groove between the two groups of conveyor belts 3, and the lamp holder at the bottom of the lighting fixture is plugged and installed on the lamp holder groove between the two groups of conveyor belts 3; Specific function The guide holes 201 at the right ends of the two adjustment frame plates 2 are respectively slidably mounted on the guide rod 101 at the right end of the bottom frame 1, and the threaded holes 202 opened at the left ends of the two adjustment frame plates 2 are respectively threadedly mounted on the two ends of the double-headed screw 102 at the left end of the bottom frame 1. The double-headed screw 102 is rotated so that the two adjustment frame plates 2 threadedly mounted on the double-headed screw 102 can move inward or outward at the same time, so that the spacing between the lamp holder grooves of the two conveyor belts 3 on it is convenient to adjust according to the specifications of the lamp holder on the lighting fixture, and the bottom of the lighting fixture The lamp holder is plugged and installed on the lamp holder groove between the two groups of conveyor belts 3, so that the top of the lighting fixture can be placed upward, which is convenient for personnel in different processes to observe and take the lighting fixture, and improves work efficiency. The device has better adjustable performance, and the spline grooves 2042 opened on the driving roller shaft 204 are respectively slidably installed on the spline shafts 103 at both ends of the base frame 1, so that when the two groups of adjustment frame plates 2 are adjusted, the driving motor 1032 can always drive the conveyor belt 3 on the driving roller shaft 204 to transmit through the spline shaft 103.

[0037] Embodiment 2: Based on Embodiment 1, Figures 5 to 8As shown, a group of guide grooves 104 are provided at the left end of the base frame 1, a group of guide blocks 502 are fixedly provided on the inner side of the bottom of the movable plate 5, and the guide blocks 502 fixedly provided on the inner side of the bottom of the movable plate 5 are slidably installed on the guide grooves 104 provided on the left end of the base frame 1, a group of first bevel gears 1031 are fixedly provided on the spline shaft 103, a group of second bevel gears 1051 are fixedly provided on the top of the transmission rod 105, and the first bevel gears 1031 on the spline shaft 103 are meshed and connected with the second bevel gears 1051 on the top of the transmission rod 105, and a group of rotating disks 1052 are fixedly provided on the bottom end of the transmission rod 105, and the outer side of the bottom of the rotating disk 1052 is fixedly provided. A group of driving shafts 1053 are installed, a group of driving slot plates 504 are fixedly installed at the bottom front end of the moving plate 5, a group of driving slots are opened on the driving slot plates 504, and the driving shafts 1053 on the outer side of the bottom of the turntable 1052 are slidably installed on the driving slots opened on the driving slot plates 504, a group of mounting slots 501 are opened on the moving plate 5, a group of dust suction vents 4021 are opened at the inner end of the dust suction box 402, the dust suction vents 4021 are placed at the bottom end of the cleaning brush 601 on the cleaning block 6, and the dust suction box 402 is snap-fitted and installed on the mounting slots 501 of the moving plate 5, a group of positioning slots 602 are opened at the left end of the cleaning block 6, and a group of positioning slots 602 are fixedly provided at the top of the moving plate 5 The positioning block 503 is assembled, and the positioning groove 602 provided at the left end of the cleaning block 6 is snap-fitted and installed on the positioning block 503 at the top of the moving plate 5 and fixed together by bolts; specifically, the guide block 502 fixedly provided on the inner side of the bottom of the moving plate 5 is slidably installed on the guide groove 104 provided on the left end of the base frame 1. When the driving motor 1032 drives the spline shaft 103 to rotate, the first bevel gear 1031 on the spline shaft 103 is meshed and connected with the second bevel gear 1051 at the top of the transmission rod 105 to drive the transmission rod 105 to rotate, and the driving shaft 1053 on the outer side of the bottom of the turntable 1052 is slidably installed on the driving groove plate 504. The cleaning block 6 of the present invention is convenient for quick disassembly and assembly, and cooperates with the dust suction vent 4021 provided at the inner end of the dust suction box 402 to further improve the cleaning effect of the device on the dust on the surface of the conveyor belt 3.

[0038] Specific usage and function of this embodiment: In the present invention, the guide holes 201 at the right ends of the two sets of adjustment frame plates 2 are respectively slidably mounted on the guide rod 101 at the right end of the base frame 1, and the threaded holes 202 opened at the left ends of the two sets of adjustment frame plates 2 are respectively threadedly mounted on the two ends of the double-headed screw 102 at the left end of the base frame 1. The double-headed screw 102 is rotated so that the two sets of adjustment frame plates 2 threadedly mounted on the double-headed screw 102 can move inward or outward at the same time, so that the spacing between the lamp holder grooves of the two sets of conveyor belts 3 thereon can be easily adjusted according to the specifications and dimensions of the lamp holders on the lighting fixture. The lamp holder at the bottom of the lighting fixture is plugged and installed on the lamp holder groove between the two groups of conveyor belts 3, so that the top of the lighting fixture can be placed upward, which is convenient for personnel in different processes to observe and take the lighting fixture, and improves work efficiency. The device has better adjustable performance, and the spline grooves 2042 provided on the driving roller shaft 204 are slidably installed on the spline shafts 103 at both ends of the bottom frame 1, so that when the two groups of adjustment frame plates 2 are adjusted, the driving motor 1032 can always drive the conveyor belt 3 on the driving roller shaft 204 through the spline shaft 103 to transmit; move The guide block 502 fixed on the inner side of the bottom of the plate 5 is slidably installed on the guide groove 104 provided at the left end of the base frame 1. When the driving motor 1032 drives the spline shaft 103 to rotate, the first bevel gear 1031 on the spline shaft 103 is meshed and connected with the second bevel gear 1051 at the top of the transmission rod 105 to drive the transmission rod 105 to rotate. The driving shaft 1053 on the outer side of the bottom of the turntable 1052 is slidably installed on the driving groove provided on the driving groove plate 504, thereby driving the moving plate 5 and the cleaning block 6 thereon to reciprocate back and forth, so that The cleaning brush 601 at the inner end of the cleaning block 6 of the device can automatically brush off the dust and dirt on the surface of the conveyor belt 3 to prevent excessive dust on the surface of the conveyor belt 3 after use and affect the transmission effect of the device on the lighting fixture. The positioning groove 602 at the left end of the cleaning block 6 is snap-fitted and installed on the positioning block 503 at the top of the movable plate 5 and fixed together by bolts, so that the cleaning block 6 of the device is easy to disassemble and assemble quickly, and cooperates with the dust suction vent 4021 at the inner end of the dust suction box 402 to further improve the cleaning effect of the device on the dust on the surface of the conveyor belt 3.

Claims

1. A lighting fixture production stable transmission device, characterized in that: comprising a base frame (1); Two sets of adjustment frames (2) are threadedly mounted on the top of the bottom frame (1), and a set of limit rotation holes (203) are respectively opened at both ends of the adjustment frame plate (2). A set of driving rollers (204) are rotatably mounted on the limit rotation holes (203) at both ends of the adjustment frame plate (2), and a set of limit columns (2041) are fixedly mounted on the outer ends of the driving rollers (204). A set of conveyor belts (3) are respectively driven and mounted on the driving rollers (204) at both ends of the adjustment frame plate (2). A set of driving rollers (204) are fixedly mounted on the left outer end of the bottom frame (1). The motor (1032) is provided on the front end of the base frame (1) and is rotatably mounted with a transmission rod (105). The left end of the conveyor belt (3) is fixedly mounted with a vacuum cleaner (4). The top end of the vacuum cleaner (4) is connected with a telescopic tube (401). The outer end of the telescopic tube (401) is mounted with a vacuum box (402). The left end of the base frame (1) is slidably mounted with a movable plate (5). The top end of the movable plate (5) is clamped with a cleaning block (6). The inner end of the cleaning block (6) is fixedly provided with a cleaning brush (601).

2. The lighting fixture production stable transmission device according to claim 1, characterized in that: A group of guide rods (101) are fixedly mounted on the right end of the base frame (1), a group of guide holes (201) are opened on the right end of the adjustment frame plate (2), and the guide holes (201) on the right ends of the two groups of adjustment frame plates (2) are respectively slidably mounted on the guide rods (101) on the right end of the base frame (1).

3. The lighting fixture production stable transmission device according to claim 1, characterized in that: A group of double-headed screws (102) are rotatably mounted on the left end of the base frame (1), a group of threaded holes (202) are opened on the left end of the adjustment frame plate (2), and the threaded holes (202) opened on the left ends of the two groups of adjustment frame plates (2) are respectively threadedly mounted on the two ends of the double-headed screws (102) at the left end of the base frame (1).

4. The lighting fixture production stable transmission device according to claim 1, characterized in that: A group of spline shafts (103) are rotatably mounted at both ends of the base frame (1), a group of spline grooves (2042) are provided on the driving roller shaft (204), the outer ends of the spline shafts (103) are fixedly mounted on the transmission shaft of the driving motor (1032), and the spline grooves (2042) provided on the driving roller shaft (204) are slidably mounted on the spline shafts (103) at both ends of the base frame (1).

5. The lighting fixture production stable transmission device according to claim 1, characterized in that: The outer surface of the conveyor belt (3) is fixedly provided with partitions (301) at equal intervals, a lamp holder groove is provided between the two groups of conveyor belts (3), and a lamp holder at the bottom end of the lighting fixture is inserted and installed on the lamp holder groove between the two groups of conveyor belts (3).

6. The lighting fixture production stable transmission device according to claim 1, characterized in that: A group of guide grooves (104) are provided at the left end of the base frame (1), a group of guide blocks (502) are fixedly provided on the inner side of the bottom of the movable plate (5), and the guide blocks (502) fixedly provided on the inner side of the bottom of the movable plate (5) are slidably mounted on the guide grooves (104) provided at the left end of the base frame (1).

7. The lighting fixture production stable transmission device according to claim 4, characterized in that: A group of first bevel gears (1031) are fixedly mounted on the spline shaft (103), a group of second bevel gears (1051) are fixedly mounted on the top of the transmission rod (105), and the first bevel gears (1031) on the spline shaft (103) are meshed and transmission-connected with the second bevel gears (1051) on the top of the transmission rod (105).

8. The lighting fixture production stable transmission device according to claim 1, characterized in that: A set of rotating disks (1052) are fixedly mounted on the bottom end of the transmission rod (105), a set of driving shafts (1053) are fixedly mounted on the outer side of the bottom of the rotating disk (1052), a set of driving slot plates (504) are fixedly mounted on the front end of the bottom of the movable plate (5), a set of driving slots are formed on the driving slot plates (504), and the driving shafts (1053) on the outer side of the bottom of the rotating disk (1052) are slidably mounted on the driving slots formed on the driving slot plates (504).

9. The lighting fixture production stable transmission device according to claim 1, characterized in that: The movable plate (5) is provided with a group of mounting grooves (501), the inner end of the dust collection box (402) is provided with a group of dust collection air outlets (4021), the dust collection air outlets (4021) are placed at the bottom ends of the cleaning brushes (601) on the cleaning block (6), and the dust collection box (402) is mounted on the mounting grooves (501) of the movable plate (5) by snap-fitting.

10. The lighting fixture production stable transmission device according to claim 1, characterized in that: A group of positioning grooves (602) are provided at the left end of the cleaning block (6), and a group of positioning blocks (503) are fixedly provided at the top of the movable plate (5), and the positioning grooves (602) provided at the left end of the cleaning block (6) are snap-fitted and mounted on the positioning blocks (503) at the top of the movable plate (5) and are fixedly connected together by bolts.

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