Photovoltaic support production equipment

Abstract

The utility model relates to the technical field of photovoltaic supports, in particular to photovoltaic support production equipment. Comprising a supporting table and further comprises moving plates which are symmetrically arranged above the supporting table, and the opposite sides of the two moving plates are fixedly connected with n-shaped frames; the adjusting assemblies are symmetrically arranged on the upper surface of the supporting table. The distance between the two [-shaped frames can be effectively adjusted through the arranged adjusting assembly, materials can be effectively fixed through the arranged fixing assembly, a worker can conveniently disassemble and assemble the cooling fan through the arranged mounting assembly, and the cooling fan is convenient to disassemble and assemble. According to the cooling fan disassembling and assembling device, the disassembling and assembling efficiency of a cooling fan is effectively improved, the overall practicability of the device is improved, waste can be effectively collected and treated through the arranged collecting assembly, manual cleaning by workers is not needed, and the workload of the workers is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic brackets, and in particular to a photovoltaic bracket production device. Background Art

[0002] Photovoltaic bracket production is an important part of the photovoltaic power generation system. It is used to support and fix photovoltaic panels to ensure that they can stably receive sunlight energy. With the rapid development of renewable energy, the demand for photovoltaic bracket production is also increasing. When producing and processing photovoltaic brackets, a photovoltaic bracket production equipment is required.

[0003] In the prior art, the cooling fan inside the production equipment is generally integrated with the equipment body. This results in that when the cooling fan is damaged, the staff cannot easily and effectively disassemble, replace, and repair the damaged cooling fan, thereby reducing the overall practicality of the production equipment. In addition, the production equipment in the prior art does not have an effective collection structure. When punching the material, a large amount of waste will be generated. If the waste is not collected and processed at this time, the staff will need to clean it manually, which not only reduces the waste collection efficiency but also increases the workload of the staff.

[0004] In contrast to the Chinese patent publication number CN221135161U, the present utility model discloses a photovoltaic bracket production device, which relates to the technical field of photovoltaic bracket production equipment, including: a heat dissipation mechanism, wherein the heat dissipation mechanism includes a processing table, four support frames are provided on one side of the top of the processing table, a protective shell is provided on one side of the top of the support frame, a protective cover is connected to one side of the inner wall of the protective shell, an assembly shell is provided on the inner wall of the slot provided in the protective cover, a micro motor is provided on the bottom side of the inner surface of the assembly shell, a rotating rod is provided at the output end of the micro motor, and fan blades are provided on the outer surface of the rotating rod. In the present utility model, the heat dissipation mechanism can dissipate heat and cool down the processed photovoltaic panel bracket, thereby avoiding thermal deformation of the newly produced photovoltaic panel bracket caused by high temperature, and at the same time, reducing failures and damage to the equipment caused by overheating, which helps to extend the service life of the equipment and reduce the maintenance cost and downtime of the equipment.

[0005] The above solution can very conveniently dissipate heat and cool down the newly processed photovoltaic bracket, and can also dissipate heat for the entire equipment. However, the cooling fan and the equipment in the above solution are still integrated, and the staff still cannot easily disassemble, replace and repair the damaged fan. Moreover, the above solution still cannot effectively collect and process waste, and fails to solve the problems raised in the above background technology.

[0006] Therefore, those skilled in the art have provided a photovoltaic bracket production device to solve the problems raised in the above background art. Content of the Utility Model

[0007] The purpose of the present utility model is to provide a photovoltaic bracket production device, including a support table, and further including:

[0008] Moving plates, symmetrically arranged above the support table, and on the relative sides of the two moving plates, there are fixedly connected C-shaped frames;

[0009] Adjusting components, symmetrically arranged on the upper surface of the support table, and used to adjust the distance between the two moving plates;

[0010] Fixing components, respectively arranged inside the two C-shaped frames, and used to fix the material;

[0011] A fixing frame, fixedly connected to the upper surface of the adjusting component, and on the front and rear inner walls of the fixing frame, there are fixedly connected a plurality of fixing frames. Inside each of the plurality of fixing frames, there is an installation plate. Outside each two installation plates, there is a connecting plate fixedly connected through an L-shaped plate. Inside the plurality of connecting plates, there are through openings for installing heat dissipation fans;

[0012] An installation component, arranged inside the installation plate, and used to fix the installation plate and the fixing frame;

[0013] A support frame, fixedly connected to the upper surface of the fixing frame, and symmetrically provided with lifting cylinders at the bottom of the support frame. The telescopic ends of the two lifting cylinders are fixedly connected with a lower pressing plate, and a punching head is fixedly connected to the bottom of the lower pressing plate;

[0014] A base, located below the support table, and on the upper surface of the base, there are fixedly connected a plurality of support plates, and the upper surfaces of the plurality of support plates are fixedly connected to the bottom of the support table;

[0015] A collection component, located on the upper surface of the base, and used to collect and process waste materials.

[0016] As a further improvement of the technical solution, the adjusting component includes adjusting plates symmetrically arranged on the upper surface of the support table. A bidirectional threaded rod is rotatably connected to the inner side wall of the adjusting plate. The other end of the bidirectional threaded rod extends to the outside of the adjusting plate and is fixedly connected with a limiting disc. A driving motor is fixedly connected to the outside of one of the adjusting plates. The output shaft of the driving motor is fixedly connected to one end of one of the bidirectional threaded rods through a coupling. The two bidirectional threaded rods are connected by a synchronous belt and pulley drive. Threaded blocks are symmetrically arranged on the outside of the bidirectional threaded rod. Guide grooves for the threaded blocks to move are opened on the opposite sides of the two adjusting plates. The opposite sides of every two threaded blocks are respectively fixedly connected to the outside of the two moving plates.

[0017] As a further improvement of the technical solution, the fixing component includes abutting discs symmetrically arranged inside the U-shaped frame. Screws are fixedly connected to the upper surfaces of the plurality of abutting discs. Knobs are fixedly connected to the tops of the plurality of screws. Threaded holes for the screws to move are penetrated and opened on the upper surfaces of the two U-shaped frames.

[0018] As a further improvement of the technical solution, the mounting component includes a fixing block fixedly connected inside the mounting plate. Expansion rods are symmetrically arranged on the outside of the fixing block. The telescopic ends of the plurality of expansion rods are fixedly connected with insertion rods. Return springs are sleeved on the outside of the plurality of expansion rods. The plurality of return springs abut between the insertion rods and the fixing block. Guide grooves for the insertion rods to move are opened on the outside of the mounting plate and the fixing frame.

[0019] As a further improvement of the technical solution, the collection component includes a collection box arranged on the upper surface of the base. A material guiding hopper is fixedly connected to the bottom of the support table. Positioning frames are symmetrically arranged on the upper surface of the base. Insertion plates are fixedly connected to both sides of the outer wall of the collection box. Guide grooves for the insertion plates to move are opened inside the two positioning frames.

[0020] As a further improvement of the technical solution, fixing sleeves are symmetrically arranged on the upper surfaces of the two positioning frames. Fixing rods are arranged inside the fixing sleeves. Pulling plates are fixedly connected to the tops of every two fixing rods. Fixing discs are fixedly connected to the outside of the fixing rods. Abutting springs are sleeved on the outside of the fixing rods. The abutting springs abut between the fixing discs and the fixing sleeves. Guide grooves for the fixing rods to move are opened on the contact surfaces between the fixing sleeves and the positioning frames. Guide grooves for the fixing rods to move are opened inside the insertion plates.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] In this photovoltaic bracket production equipment, through the set adjustment component, fixing component, installation component and collection component, when the material needs to be punched, it is only necessary to first adjust the distance between the two U-shaped frames through the adjustment component. After the distance between the U-shaped frames is adjusted, the material is placed between the two U-shaped frames, and then the material is effectively fixed through the fixing component. When the material is fixed, the lifting cylinder starts to run. At this time, the lifting cylinder will drive the lower pressure plate and the punching head to move synchronously, so that the material can be effectively punched through the punching head. In the process of punching the material, the cooling fan will also be turned on at the same time. The machine starts running at the first step. At this time, the cooling fan can be used to cool down the newly processed materials. When the cooling fan needs to be disassembled, replaced or repaired, the mounting plate and the fixed frame can be easily disassembled through the mounting assembly, so that the staff can replace and repair the damaged cooling fan, which effectively improves the overall practicality of the device. In the process of punching the material, a large amount of waste will be generated. At this time, the collection assembly can effectively collect and process the waste without the need for manual cleaning by the staff, which effectively improves the waste collection efficiency, reduces the workload of the staff, and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the cutaway three-dimensional structure of the adjustment plate in the present invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the heat dissipation fan of the present invention after being disassembled;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the collection frame after disassembly in the present invention;

[0027] Figure 5 for Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0028] Figure 6 for Figure 3 Schematic diagram of the enlarged structure of the middle B area;

[0029] Figure 7 for Figure 4 Schematic diagram of the enlarged structure of the C area in the middle.

[0030] The meaning of each number in the figure is:

[0031] 1. Support platform; 2. Adjusting plate; 3. Fixed frame; 4. Support frame; 5. Lifting cylinder; 6. Moving plate; 7. C-shaped frame; 8. Support plate; 9. Base; 10. Driving motor; 11. Bidirectional threaded rod; 12. Threaded block; 13. Limiting disc; 14. Synchronous belt; 15. Lower pressing plate; 16. Punching head; 17. Fixed frame; 18. Connecting plate; 19. Cooling fan; 20. Feeding hopper; 21. Collection box; 22. Insertion plate; 23. Positioning frame; 24. Fixed sleeve; 25. Screw; 26. Contact disc; 27. Knob; 28. Mounting plate; 29. L-shaped plate; 30. Fixed block; 31. Telescopic rod; 32. Insertion rod; 33. Return spring; 34. Fixed rod; 35. Fixed disc; 36. Contact spring. Specific implementation manner

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figure 1 - Figure 7 As shown in the figure, this embodiment provides a photovoltaic bracket production device, including a support platform 1, and further including:

[0034] Moving plates 6, symmetrically arranged above the support platform 1, and fixed connections are provided on the opposite sides of the two moving plates 6 with C-shaped frames 7;

[0035] Adjusting components, symmetrically arranged on the upper surface of the support platform 1, and used for adjusting the distance between the two moving plates 6;

[0036] Fixing components, respectively arranged inside the two C-shaped frames 7, and used for fixing the materials;

[0037] Fixed frames 3, fixedly connected to the upper surface of the adjusting components, and a plurality of fixed frames 17 are fixedly connected to the front and rear inner walls of the fixed frames 3. Mounting plates 28 are provided inside the plurality of fixed frames 17. The outside of each two mounting plates 28 is fixedly connected with connecting plates 18 through L-shaped plates 29. Mounting holes for installing cooling fans 19 are penetrated and opened inside the plurality of connecting plates 18;

[0038] Mounting components, arranged inside the mounting plates 28, and used for fixing between the mounting plates 28 and the fixed frames 17;

[0039] The support frame 4 is fixedly connected to the upper surface of the fixed frame 3. The bottom of the support frame 4 is symmetrically provided with lifting cylinders 5. The telescopic ends of the two lifting cylinders 5 are fixedly connected with a lower pressing plate 15, and the bottom of the lower pressing plate 15 is fixedly connected with a punching head 16;

[0040] The base 9 is located below the support table 1. The upper surface of the base 9 is fixedly connected with a plurality of support plates 8, and the upper surfaces of the plurality of support plates 8 are all fixedly connected with the bottom of the support table 1;

[0041] The collection component is located on the upper surface of the base 9 and is used for collecting and processing waste materials.

[0042] The above working principle: When it is necessary to perform punching processing on materials, first adjust the distance between the two U-shaped frames 7 through the adjustment component. After the distance between the U-shaped frames 7 is adjusted, place the material between the two U-shaped frames 7, and then effectively fix the material through the fixing component. When the material is fixed, the lifting cylinder 5 starts to operate. At this time, the lifting cylinder 5 will drive the lower pressing plate 15 and the punching head 16 to move synchronously, so that the material can be effectively punched through the punching head 16. During the punching process of the material, the cooling fan 19 will also start to operate synchronously. At this time, the cooling fan 19 can be used to cool the just-processed material. When it is necessary to disassemble, replace and repair the cooling fan 19, simply through the installation component, the mounting plate 28 can be conveniently disassembled from the fixed frame 17, which is convenient for the staff to replace and repair the damaged cooling fan 19, effectively improving the overall practicality of the device. During the punching process of the material, a large amount of waste materials will be generated. At this time, the collection component can effectively collect and process the waste materials, without the need for manual cleaning by the staff, effectively improving the waste collection efficiency and reducing the work burden of the staff, saving time and effort.

[0043] In order to conveniently and effectively adjust the distance between the two U-shaped frames 7, the adjusting component includes adjusting plates 2 symmetrically arranged on the upper surface of the support table 1. The inner side wall of the adjusting plate 2 is rotatably connected with a bidirectional threaded rod 11. The other end of the bidirectional threaded rod 11 extends to the outside of the adjusting plate 2 and is fixedly connected with a limiting disk 13. A driving motor 10 is fixedly connected to the outside of one of the adjusting plates 2. The output shaft of the driving motor 10 is fixedly connected with one end of one of the bidirectional threaded rods 11 through a coupling. The two bidirectional threaded rods 11 are connected by a synchronous belt 14 and pulley drive. Threaded blocks 12 are symmetrically arranged on the outside of the bidirectional threaded rod 11. Guide grooves for the threaded blocks 12 to move are opened on the opposite sides of the two adjusting plates 2. The opposite sides of every two threaded blocks 12 are respectively fixedly connected to the outside of the two moving plates 6. When it is necessary to adjust the distance between the two U-shaped frames 7, the driving motor 10 starts to operate. At this time, the driving motor 10 will drive one of the bidirectional threaded rods 11 to rotate synchronously. Since the two bidirectional threaded rods 11 are connected by a synchronous belt 14 and pulley drive, the two bidirectional threaded rods 11 will rotate synchronously at this time. The threaded blocks 12 will move synchronously on the outside of the bidirectional threaded rod 11,带动 the moving plates 6 to move synchronously, and the moving plates 6 will then带动 the U-shaped frames 7 to move synchronously. At this time, the distance between the two U-shaped frames 7 can be adjusted according to the different specifications and sizes of the materials.

[0044] Considering that when punching the material, it is necessary to fix the material first, the fixing component includes abutting disks 26 symmetrically arranged inside the U-shaped frames 7. Screw rods 25 are fixedly connected to the upper surfaces of the plurality of abutting disks 26. Knobs 27 are fixedly connected to the tops of the plurality of screw rods 25. Threaded holes for the screw rods 25 to move are respectively opened through the upper surfaces of the two U-shaped frames 7. When it is necessary to fix the material, just place the material between the two U-shaped frames 7 first, and then rotate the knob 27. At this time, the knob 27 will drive the screw rod 25 to rotate synchronously in the threaded hole on the upper surface of the U-shaped frame 7, and the screw rod 25 will then drive the abutting disk 26 to move synchronously. When the abutting disk 26 abuts against the upper surface of the material, the material can be effectively fixed and clamped, so as to facilitate the device to punch the material.

[0045] In order to facilitate the staff to install the cooling fan 19, the installation assembly includes a fixed block 30 fixedly connected to the inside of the mounting plate 28, and a telescopic rod 31 is symmetrically provided on the outside of the fixed block 30. The telescopic ends of the multiple telescopic rods 31 are fixedly connected to the insertion rod 32, and the outsides of the multiple telescopic rods 31 are sleeved with reset springs 33. The multiple reset springs 33 are in contact between the insertion rod 32 and the fixed block 30. The outsides of the mounting plate 28 and the fixed frame 17 are provided with guide grooves for the movement of the insertion rod 32. When the cooling fan 19 needs to be installed, it is only necessary to press the insertion rod 32 first. At this time, the insertion rod 32 will press the telescopic rod 31 and the reset spring 33. The spring 33 is squeezed synchronously, and then the mounting plate 28 is inserted into the interior of the fixed frame 17. At this time, the mounting plate 28 will drive the insertion rod 32 to move synchronously. When the mounting plate 28 drives the insertion rod 32 to move into the guide groove outside the fixed frame 17, the reset spring 33 is reset, driving the insertion rod 32 to move synchronously. When the insertion rod 32 is inserted into the guide groove outside the fixed frame 17, the mounting plate 28 and the fixed frame 17 can be fixed. At this time, the connecting plate 18 and the cooling fan 19 can be installed, and it can also be convenient for the staff to disassemble, replace and repair the cooling fan 19, effectively improving the overall practicality of the device.

[0046] In order to effectively collect and process waste, the collection component includes a collection frame 21 arranged on the upper surface of the base 9, a guide hopper 20 is fixedly connected to the bottom of the support table 1, and a positioning frame 23 is symmetrically provided on the upper surface of the base 9. Insert plates 22 are fixedly connected on both sides of the outer wall of the collection frame 21, and guide grooves for the movement of the insert plates 22 are provided inside the two positioning frames 23. When the material punching is completed, the waste will naturally fall into the inside of the collection frame 21. At this time, the waste can be collected and processed by the collection frame 21 without the need for manual cleaning by the staff. Through the setting of the guide hopper 20, the waste can be effectively guided and processed, thereby preventing the waste from falling to the ground.

[0047] In addition, in order to effectively fix the collection frame 21 and avoid displacement of the collection frame 21 during use, the upper surfaces of the two positioning frames 23 are symmetrically provided with fixing sleeves 24, and the interior of the fixing sleeves 24 is provided with fixing rods 34. The tops of the two fixing rods 34 are fixedly connected with pull plates, and the exteriors of the fixing rods 34 are fixedly connected with fixing disks 35. The exteriors of the fixing rods 34 are sleeved with interference springs 36, which interfere with the fixing disks 35 and the fixing sleeves 24. The contact surfaces of the fixing sleeves 24 and the positioning frame 23 are provided with guide grooves for the movement of the fixing rods 34, and the interior of the inserting plate 22 is provided with guide grooves for the movement of the fixing rods 34. When the collection frame 21 needs to be fixed, the fixing sleeves 24 are symmetrically provided with fixing sleeves 24, and the interior of the inserting plate 22 is provided with guide grooves for the movement of the fixing rods 34. When fixing the plate 21, it is only necessary to pull the pull plate first. At this time, the pull plate will drive the fixing rod 34 to move synchronously, and the fixing rod 34 will drive the fixing plate 35 to move synchronously. During the movement of the fixing plate 35, the resistance spring 36 will be squeezed. At this time, the insert plate 22 is inserted into the interior of the positioning frame 23, and the pull plate is released. At this time, the resistance spring 36 is reset, driving the fixing plate 35 and the fixing rod 34 to move synchronously. When the fixing rod 34 is inserted into the guide groove inside the insert plate 22, the positioning frame 23 and the insert plate 22 can be fixed. At this time, the collection frame 21 can be fixed, thereby avoiding displacement of the collection frame 21 during use, which affects the collection effect of the waste.

[0048] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic support production device, comprising a support platform (1), characterized in that: It further includes: Moving plates (6), symmetrically arranged above the support table (1), and C-shaped frames (7) are fixedly connected to the opposite sides of the two moving plates (6); Adjusting components, symmetrically arranged on the upper surface of the support table (1) and used to adjust the distance between the two moving plates (6); Fixing components, respectively arranged inside the two C-shaped frames (7) and used to fix the material; A fixing frame (3), fixedly connected to the upper surface of the adjusting component. Both the front and rear inner walls of the fixing frame (3) are fixedly connected with a plurality of fixing frames (17). Installation plates (28) are arranged inside the plurality of fixing frames (17). Connecting plates (18) are fixedly connected to the outside of every two installation plates (28) through L-shaped plates (29). Installation holes for installing cooling fans (19) are penetratingly opened inside the plurality of connecting plates (18); An installation component, arranged inside the installation plate (28) and used to fix the installation plate (28) and the fixing frame (17); A support frame (4), fixedly connected to the upper surface of the fixing frame (3). Lifting cylinders (5) are symmetrically arranged at the bottom of the support frame (4). The telescopic ends of the two lifting cylinders (5) are fixedly connected with a lower pressing plate (15). A punching head (16) is fixedly connected to the bottom of the lower pressing plate (15); A base (9), located below the support table (1). A plurality of support plates (8) are fixedly connected to the upper surface of the base (9). The upper surfaces of the plurality of support plates (8) are fixedly connected to the bottom of the support table (1); A collection component, located on the upper surface of the base (9) and used to collect waste materials.

2. The photovoltaic bracket production equipment according to claim 1, characterized in that: The adjusting component includes adjusting plates (2) symmetrically arranged on the upper surface of the support table (1). A bidirectional threaded rod (11) is rotatably connected to the inner side wall of the adjusting plate (2). The other end of the bidirectional threaded rod (11) extends outside the adjusting plate (2) and is fixedly connected with a limiting disk (13). A driving motor (10) is fixedly connected to the outside of one of the adjusting plates (2). The output shaft of the driving motor (10) is fixedly connected to one end of one of the bidirectional threaded rods (11) through a coupling. The two bidirectional threaded rods (11) are connected by a synchronous belt (14) and pulley drive. Threaded blocks (12) are symmetrically arranged on the outside of the bidirectional threaded rod (11). Guide grooves for the threaded blocks (12) to move are opened on the opposite sides of the two adjusting plates (2). The opposite sides of every two threaded blocks (12) are respectively fixedly connected to the outside of the two moving plates (6).

3. The photovoltaic bracket production equipment according to claim 1, characterized in that: The fixing component includes abutting disks (26) symmetrically arranged inside the C-shaped frames (7). Screws (25) are fixedly connected to the upper surfaces of the plurality of abutting disks (26). Knobs (27) are fixedly connected to the tops of the plurality of screws (25). Threaded holes for the screws (25) to move are penetratingly opened on the upper surfaces of the two C-shaped frames (7).

4. The photovoltaic bracket production equipment according to claim 1, characterized in that: The mounting assembly includes a fixed block (30) fixedly connected to the inside of the mounting plate (28), telescopic rods (31) are symmetrically provided on the outside of the fixed block (30), the telescopic ends of the plurality of telescopic rods (31) are fixedly connected to the insertion rods (32), the outsides of the plurality of telescopic rods (31) are sleeved with reset springs (33), the plurality of reset springs (33) are in contact between the insertion rods (32) and the fixed block (30), and the outsides of the mounting plate (28) and the fixed frame (17) are provided with guide grooves for the movement of the insertion rods (32).

5. The photovoltaic bracket production equipment according to claim 1, characterized in that: The collecting assembly comprises a collecting frame (21) arranged on the upper surface of the base (9); a guide hopper (20) is fixedly connected to the bottom of the supporting platform (1); positioning frames (23) are symmetrically provided on the upper surface of the base (9); plug-in plates (22) are fixedly connected to both sides of the outer wall of the collecting frame (21); and guide grooves for the plug-in plates (22) to move are provided inside the two positioning frames (23).

6. The photovoltaic bracket production equipment according to claim 5, characterized in that: The upper surfaces of the two positioning frames (23) are symmetrically provided with fixed sleeves (24), the interior of the fixed sleeves (24) is provided with fixed rods (34), the top ends of the two fixed rods (34) are fixedly connected with pull plates, the exterior of the fixed rods (34) is fixedly connected with fixed disks (35), the exterior of the fixed rods (34) is sleeved with a resisting spring (36), the resisting spring (36) resists between the fixed disk (35) and the fixed sleeves (24), the contact surfaces of the fixed sleeves (24) and the positioning frames (23) are provided with guide grooves for the movement of the fixed rods (34), and the interior of the plug plate (22) is provided with guide grooves for the movement of the fixed rods (34).

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