Feeding machine for ceramic tile production

Abstract

The utility model discloses a feeding machine for ceramic tile production, which comprises a machine tool, a dust removal device is arranged on the machine tool and comprises a dust removal box, a fan and a dust collection bin, the fan is mounted at the top end of the dust removal box, the dust collection bin is mounted in the dust removal box, and the input end of the fan is connected with a connecting device. The connecting device comprises a connecting pipe, a casing pipe, a movable frame, a sliding frame, a sliding sleeve, a sliding groove, an inserting mechanism, a clamping plate, a vertical rod, a passing groove, a rotating groove, a rotating sleeve, a straight groove, a fixed plate and a tension spring, the movable frame is installed in the sliding groove, the sliding frame is arranged in the sliding sleeve, the sliding groove is formed in the sliding frame, the clamping plate is connected to one end of the vertical rod, the vertical rod is connected to one side of the sliding sleeve, and the inserting mechanism is inserted into the inserting mechanism. The straight groove penetrates through the side wall of the sleeve, the fixing plate is connected to the outer side of the sleeve, the two ends of the tension spring are connected with the fixing plate and the sliding sleeve, and the opening and closing mechanisms are arranged on the two sides of the dust removal box. The ceramic tile production technology environment friendliness and operation efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a feeder for producing ceramic tiles, and more specifically, to a feeder for producing ceramic tiles. Background Art

[0002] In the traditional process of tile production, the raw material processing and transportation stage is a particularly critical link. Specifically, this stage includes conveying the raw materials of tiles such as clay, quartz sand, etc. to the ball mill for grinding via a conveyor belt. In the ball mill, these solid raw materials are ground into fine particles to form a mud-like substance. In this process, the fine particles and dust of the raw materials will form dust on the conveyor belt. This dust not only pollutes the working environment, but also may pose a threat to the health of the workers.

[0003] In order to alleviate this environmental pollution and health risks, dust collection devices are installed on some production lines to collect the dust. However, the current dust collection devices are usually simple in design, and most of them are open on both sides. This open design means that although the dust collection device can absorb most of the directly rising dust, some dust still escapes from both sides of the device and cannot be effectively controlled. In this way, the dust can still spread from these unenclosed sides to other areas of the workshop, causing environmental pollution.

[0004] In addition, the existing dust collection system has problems with pipe connection and maintenance. The pipe system usually requires regular inspection and maintenance to ensure the dust removal efficiency and the normal operation of the equipment. However, the existing pipe connection design is often complicated and requires professional tools and technicians to operate. When the pipe is blocked or damaged and needs to be replaced, the complicated disassembly and reconnection process is not only time-consuming but also affects production efficiency. These problems indicate that the existing dust collection system design needs to be improved to facilitate quick disassembly and maintenance, reduce production interruption time, and improve overall work efficiency. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the utility model provides a loading machine for tile production to solve the technical problems mentioned in the background technology.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a feeder for tile production, including a machine tool, characterized in that: a dust removal device is arranged on the machine tool, the dust removal device includes a dust removal box, a fan and a dust suction bin, the dust removal box is installed above the machine tool, the fan is installed on the top of the dust removal box, the dust suction bin is installed in the dust removal box, the fan input end is connected with a connecting device, the connecting device includes a connecting pipe, a sleeve, a movable frame, a sliding frame, a sliding sleeve, a sliding groove, a plug-in mechanism, a card plate, a vertical rod, a through groove, a rotating groove, a rotating sleeve, a straight groove, a fixed plate and a tension spring, and the sleeves are respectively connected At the top of the dust removal box and the input and output ends of the fan, one end of the connecting pipe is inserted into the sleeve, the movable frame can be movably installed in the sliding groove, the sliding frame is fixedly arranged in the sliding sleeve, the sliding groove is opened in the sliding frame, the clamping plate is fixedly connected to one end of the vertical rod, the vertical rod is connected to one side of the sliding sleeve, and the through groove is opened at one end of the rotating groove, the rotating groove is opened on the rotating sleeve, the rotating sleeve can be movably sleeved on the outside of the sleeve, the straight groove runs through the side wall of the sleeve, the fixed plate is fixedly connected to the outside of the sleeve, the two ends of the tension spring are respectively connected to the fixed plate and the sliding sleeve, and an opening and closing mechanism is arranged on both sides of the dust removal box.

[0009] The utility model is further configured that a transmission wheel is provided inside the machine tool, and a conveyor belt is sleeved outside the transmission wheel.

[0010] The utility model is further configured that a partition is provided on the outer side of the conveyor belt, and a plurality of the partitions are fixedly arranged on the outer side of the conveyor belt. The arrangement of the partition facilitates the conveyor belt to transport raw materials.

[0011] The utility model is further configured that a motor is arranged outside the machine tool, a sprocket is arranged at the output end of the motor and one end of the transmission wheel, and a chain is sleeved at the outer side of the sprocket.

[0012] The utility model is further configured as follows: the plug-in mechanism includes a push spring, a plug-in rod and a plug-in slot, the plug-in slot is arranged on the outer side of the connecting pipe, one end of the plug-in rod is engaged in the plug-in slot, the other end of the plug-in rod is fixedly connected to the movable frame, and the push spring can be movably connected to one side of the plug-in rod.

[0013] The utility model is further configured such that a sealing ring is provided on the outer side of the connecting pipe, a sealing groove is provided on the inner side of the sleeve, the sealing ring is inserted into the sealing groove, and the design of the sealing ring and the sealing groove ensures the sealing performance of the pipeline connection.

[0014] The utility model is further configured as follows: the opening and closing mechanism includes an opening and closing plate, a rotating shaft, a torsion spring and a connecting rod; the opening and closing plates are movably mounted on both sides of the dust removal box, and the two opening and closing plates are opened and closed in the same side direction; the torsion spring is movably mounted on the outside of the rotating shaft; the connecting rod is fixedly connected to both ends of the torsion spring; the opening and closing mechanism can effectively reduce the escape of dust.

[0015] The utility model is further configured that bolts are provided on the opening and closing plate and the dust removal box, and the connecting rod is fixed to the opening and closing plate and the dust removal box respectively by bolts.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a feeding machine for tile production, which has the following

[0018] Beneficial effects:

[0019] 1. The dust removal device effectively collects and processes dust through the dust removal box installed on the top of the machine tool, the fan on the top and the internal dust collection bin. Through the action of the fan, the dust is sucked into the dust collection bin and sent to the external storage device through the connecting device, which greatly reduces the dust pollution in the working environment and improves the safety of the working environment.

[0020] 2. The opening and closing mechanism controls the opening and closing of the side of the dust removal box through the side opening and closing plates, the connected rotating shaft, the torsion spring and the connecting rod. This mechanism allows the opening and closing plates to open automatically when the raw materials pass through, and automatically close after the raw materials pass through, thereby optimizing the dust sealing treatment, effectively reducing the escape of dust, and enhancing the environmental performance of the entire equipment.

[0021] 3. The design of the connection device includes components such as movable frames, sliding frames, sliding sleeves and clamps, making the entire pipeline connection system more flexible and easy to maintain. Especially when maintenance or replacement of parts is required, it can be quickly disassembled and reconnected through simple operations, which significantly improves the maintenance efficiency and equipment reliability. In addition, the addition of sealing rings and sealing grooves ensures the sealing of the connection, prevents possible leakage, and further improves the overall efficiency and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a feeder for tile production in the utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0024] Figure 3 for Figure 1 A schematic diagram of the local enlarged structure at B in the middle;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Figure 5 It is a cross-sectional structural diagram of the connecting device part in the utility model;

[0027] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure at C in the middle;

[0028] Figure 7 It is a structural schematic diagram of the sliding sleeve part in the utility model.

[0029] In the figure: 1. machine tool; 2. dust removal box; 3. fan; 4. dust suction bin; 5. connecting pipe; 6. sleeve; 7. movable frame; 8. sliding frame; 9. sliding sleeve; 10. sliding groove; 11. clamping plate; 12. vertical rod; 13. through groove; 14. rotating groove; 15. rotating sleeve; 16. straight groove; 17. fixed plate; 18. tension spring; 19. transmission wheel; 20. conveyor belt; 21. partition; 22. motor; 23. sprocket; 24. chain; 25. push spring; 26. plug-in rod; 27. plug-in groove; 28. sealing ring; 29. ​​sealing groove; 30. opening and closing plate; 31. rotating shaft; 32. torsion spring; 33. connecting rod; 34. bolt. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0032] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0033] See also Figure 1-7A feeder for tile production includes a machine tool 1, which is characterized in that: a dust removal device is provided on the machine tool 1, the dust removal device includes a dust removal box 2, a fan 3 and a dust suction bin 4, the dust removal box 2 is installed above the machine tool 1, the fan 3 is installed on the top of the dust removal box 2, the dust suction bin 4 is installed in the dust removal box 2, and the input end of the fan 3 is connected with a connecting device, the connecting device includes a connecting pipe 5, a sleeve 6, a movable frame 7, a sliding frame 8, a sliding sleeve 9, a sliding groove 10, a plug-in mechanism, a card plate 11, a vertical rod 12, a through groove 13, a rotating groove 14, a rotating sleeve 15, a straight groove 16, a fixed plate 17 and a tension spring 18, the sleeve 6 is respectively connected to the top of the dust removal box 2 and the fan 3. The input and output ends of the machine 3, one end of the connecting pipe 5 is inserted into the sleeve 6, the movable frame 7 can be movably installed in the sliding groove 10, the sliding frame 8 is fixedly arranged in the sliding sleeve 9, the sliding groove 10 is opened in the sliding frame 8, the clamping plate 11 is fixedly connected to one end of the vertical rod 12, the vertical rod 12 is connected to one side of the sliding sleeve 9, the through groove 13 is opened at one end of the rotating groove 14, the rotating groove 14 is opened on the rotating sleeve 15, the rotating sleeve 15 can be movably sleeved on the outside of the sleeve 6, the straight groove 16 runs through the side wall of the sleeve 6, the fixed plate 17 is fixedly connected to the outside of the sleeve 6, the two ends of the tension spring 18 are respectively connected to the fixed plate 17 and the sliding sleeve 9, and the dust removal box 2 is provided with an opening and closing mechanism on both sides.

[0034] A transmission wheel 19 is provided inside the machine tool 1 , and a conveyor belt 20 is sleeved outside the transmission wheel 19 .

[0035] A partition plate 21 is provided on the outside of the conveyor belt 20 , and a plurality of partition plates 21 are fixedly arranged on the outside of the conveyor belt 20 .

[0036] A motor 22 is disposed outside the machine tool 1 , a sprocket 23 is disposed at the output end of the motor 22 and one end of the transmission wheel 19 , and a chain 24 is sleeved outside the sprocket 23 .

[0037] The plug-in mechanism includes a push spring 25, a plug-in rod 26 and a plug-in slot 27. The plug-in slot 27 is arranged on the outer side of the connecting pipe 5. One end of the plug-in rod 26 is engaged in the plug-in slot 27. The other end of the plug-in rod 26 is fixedly connected to the movable frame 7. The push spring 25 can be movably connected to one side of the plug-in rod 26.

[0038] A sealing ring 28 is disposed on the outer side of the connecting pipe 5 , a sealing groove 29 is formed on the inner side of the sleeve 6 , and the sealing ring 28 is inserted into the sealing groove 29 .

[0039] In this embodiment, when the device needs to be used, the raw material is first placed on the conveyor belt 20, and then the motor 22 is turned on. The motor 22 drives the chain 24 to run through the sprocket 23 connected to the output end, and then the chain 24 drives another sprocket 23 to rotate, and then the sprocket 23 drives the transmission wheel 19 to rotate, and then the transmission wheel 19 will drive the conveyor belt 20 set on the outside to run, and then the conveyor belt 20 will drive the raw material to move, and the partition 21 will push the raw material to move, and then the raw material will be transported to the dust removal box 2, and then the fan 3 will be turned on, and the fan 3 will suck the dust from the dust collection bin 4 through the connecting pipe 5 connected to the input end, and then transport it through the connecting pipe 5 connected to the output end of the fan 3. To the storage device of the external device, the dust is effectively handled, and then the conveyor belt 20 will transport the raw materials to the next process. When the pipeline needs to be maintained or repaired, the rotating sleeve 15 is rotated, and the rotating sleeve 15 drives the through groove 13 and the rotating groove 14 to move. When the card plate 11 corresponds to the position of the through groove 13, the rotating sleeve 15 stops rotating, and the tension spring 18 pulls the sliding sleeve 9 to move, and then the sliding sleeve 9 drives the inner sliding frame 8 and the sliding groove 10 to move. Due to the special structural design of the sliding groove 10, when the sliding groove 10 moves with the sliding sleeve 9, the movable frame 7 will drive the plug rod 26 to move outward, and one end of the plug rod 26 will gradually detach from the plug groove 27. When the tension spring After 18 is fully reset, the plug-in rod 26 is completely disengaged from the plug-in slot 27, and the push will push the movable frame 7 and the plug-in rod 26 close to the sliding frame 8, and then the connecting pipe 5 is pulled outward to remove one end of the connecting pipe 5 from the sleeve 6. After the maintenance or replacement of the connecting pipe 5 is completed, the connecting pipe 5 is inserted into the sleeve 6, and then the sliding sleeve 9 is pushed. The sliding sleeve 9 pulls the tension spring 18 to open, and then the sliding sleeve 9 will drive the movable frame 7 and the plug-in rod 26 to reset through the cooperation of the sliding frame 8 and the sliding slot 10, and then the plug-in rod 26 will gradually be inserted into the plug-in slot 27, and then the sliding sleeve 9 will continue to be pushed, and the card plate 11 will pass through the slot 13 and be placed on one side of the rotating sleeve 15. At the same time, the sliding sleeve 9 will drive the plug-in rod 26 and the movable frame 7 to move through the sliding frame 8 and the sliding groove 10, so that the plug-in rod 26 squeezes the push spring 25, and at the same time, the plug-in rod 26 drives the connecting pipe 5 to move through the plug-in groove 27, so that the sealing ring 28 arranged on the outside of the connecting pipe 5 is inserted into the sealing groove 29, thereby ensuring the sealing of the connection while realizing rapid docking of the pipelines, and then the rotating sleeve 15 is rotated in the opposite direction, so that the rotating sleeve 15 drives the groove 13 and the rotating groove 14 to move, and then the vertical rod 12 will enter the rotating groove 14, and the clamping plate 11 will be engaged on one side of the rotating sleeve 15, thereby realizing stable limiting of the sliding sleeve 9 and ensuring stable connection between the pipelines.

[0040] See also Figure 1-4As an implementation of the opening and closing mechanism: the opening and closing mechanism includes an opening and closing plate 30, a rotating shaft 31, a torsion spring 32 and a connecting rod 33. The opening and closing plates 30 can be movably installed on both sides of the dust removal box 2, and the two opening and closing plates 30 can be opened and closed in the same side direction. The torsion spring 32 can be movably mounted on the outside of the rotating shaft 31, and the connecting rod 33 is fixedly connected to both ends of the torsion spring 32.

[0041] Bolts 34 are provided on the opening and closing plate 30 and the dust removal box 2 , and the connecting rod 33 is fixed to the opening and closing plate 30 and the dust removal box 2 respectively by the bolts 34 .

[0042] More specifically, when the raw materials are transported by the conveyor belt 20, the partition 21 will push the raw materials to move, and then the raw material pile will push the opening and closing plate 30 open, so that the opening and closing plate 30 drives the torsion spring 32 to rotate on the outside of the rotating shaft 31 through the connecting rod 33. When the raw materials pass through, the torsion spring 32 will drive the opening and closing plate 30 to reset, so that the opening and closing plate 30 is closed again, thereby improving the traditional double-open structure and being able to effectively suppress the escape of dust.

[0043] In summary, when the overall equipment is in use or running: when the equipment needs to be used, first put the raw material on the conveyor belt 20, then turn on the motor 22, the motor 22 drives the chain 24 to run through the sprocket 23 connected to the output end, and then the chain 24 drives another sprocket 23 to rotate, and then the sprocket 23 drives the transmission wheel 19 to rotate, and then the transmission wheel 19 will drive the conveyor belt 20 set on the outside to run, and then the conveyor belt 20 will drive the raw material to move, and make the partition 21 push the raw material to move, and then the raw material will be transported to the dust removal box 2, and then turn on the fan 3, the fan 3 will suck the dust from the dust collection bin 4 through the connecting pipe 5 connected to the input end, and then connect the output end of the fan 3. The connecting pipe 5 is transported to the storage device of the external device to achieve effective treatment of dust, and then the conveyor belt 20 will transport the raw materials to the next process. When the pipeline needs to be maintained or repaired, the rotating sleeve 15 is rotated, and the rotating sleeve 15 drives the through groove 13 and the rotating groove 14 to move. When the card plate 11 corresponds to the position of the through groove 13, the rotating sleeve 15 stops rotating, and the tension spring 18 pulls the sliding sleeve 9 to move, and then the sliding sleeve 9 drives the inner sliding frame 8 and the sliding groove 10 to move. Due to the special structural design of the sliding groove 10, when the sliding groove 10 moves with the sliding sleeve 9, the movable frame 7 drives the plug rod 26 to move outward, and one end of the plug rod 26 will gradually disengage from the plug groove 27 When the tension spring 18 is fully reset, the plug rod 26 is completely disengaged from the plug slot 27, and the push will push the movable frame 7 and the plug rod 26 close to the sliding frame 8, and then the connecting pipe 5 is pulled outward, so that one end of the connecting pipe 5 can be removed from the sleeve 6, and then the connecting pipe 5 is maintained, repaired or replaced, The connecting pipe 5 is inserted into the sleeve 6, and then the sliding sleeve 9 is pushed, and the sliding sleeve 9 pulls the tension spring 18 to open, and then the sliding sleeve 9 will drive the movable frame 7 and the plug rod 26 to reset through the cooperation of the sliding frame 8 and the sliding groove 10, and then the plug rod 26 will gradually be inserted into the plug slot 27, and then the sliding sleeve 9 will continue to be pushed, and the card plate 11 will pass through the slot 13 and be placed on the rotating sleeve 15. On the other hand, the sliding sleeve 9 will drive the plug-in rod 26 and the movable frame 7 to move through the sliding frame 8 and the sliding groove 10, so that the plug-in rod 26 squeezes the push spring 25, and at the same time, the plug-in rod 26 drives the connecting pipe 5 to move through the plug-in groove 27, so that the sealing ring 28 arranged on the outside of the connecting pipe 5 is inserted into the sealing groove 29, thereby ensuring the sealing of the connection while realizing rapid docking of the pipelines, and then the rotating sleeve 15 is rotated in the opposite direction, so that the rotating sleeve 15 drives the movement through the groove 13 and the rotating groove 14, and then the vertical rod 12 will enter the rotating groove 14, and the clamping plate 11 will be engaged on one side of the rotating sleeve 15, thereby realizing stable limiting of the sliding sleeve 9 and ensuring stable connection between the pipelines.

[0044] When the raw materials are transported by the conveyor belt 20, the partition 21 will push the raw materials to move, and then the raw material pile will push the opening and closing plate 30 open, so that the opening and closing plate 30 drives the torsion spring 32 to rotate on the outside of the rotating shaft 31 through the connecting rod 33. When the raw materials pass through, the torsion spring 32 will drive the opening and closing plate 30 to reset, so that the opening and closing plate 30 is closed again, thereby improving the traditional double-open structure and being able to effectively suppress the escape of dust.

[0045] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A loading machine for producing tiles, comprising a machine tool (1), characterized in that: The machine tool (1) is provided with a dust removal device, the dust removal device comprising a dust removal box (2), a fan (3) and a dust collection bin (4), the fan (3) being installed at the top of the dust removal box (2), the dust collection bin (4) being installed in the dust removal box (2), the input end of the fan (3) being connected with a connecting device, the connecting device comprising a connecting pipe (5), a sleeve (6), a movable frame (7), a sliding frame (8), a sliding sleeve (9), a sliding groove (10), a plug-in mechanism, a card plate (11), a vertical rod (12), a through groove (13), a rotating groove (14), a rotating sleeve (15), a straight groove (16), a fixed plate (17) and a tension spring (1 8), the movable frame (7) is installed in the sliding groove (10), the sliding frame (8) is arranged in the sliding sleeve (9), the sliding groove (10) is opened in the sliding frame (8), the clamping plate (11) is connected to one end of the vertical rod (12), the vertical rod (12) is connected to one side of the sliding sleeve (9), the through groove (13) is opened at one end of the rotating groove (14), the rotating groove (14) is opened on the rotating sleeve (15), the straight groove (16) passes through the side wall of the sleeve (6), the fixed plate (17) is connected to the outside of the sleeve (6), the two ends of the tension spring (18) are connected to the fixed plate (17) and the sliding sleeve (9), and the dust removal box (2) is provided with an opening and closing mechanism on both sides.

2. A tile production feeding machine according to claim 1, characterized in that: A transmission wheel (19) is provided on the inner side of the machine tool (1), and a conveyor belt (20) is sleeved on the outer side of the transmission wheel (19).

3. A tile production feeding machine according to claim 2, characterized in that: A partition plate (21) is provided on the outside of the conveyor belt (20), and a plurality of the partition plates (21) are fixedly arranged on the outside of the conveyor belt (20).

4. A tile production feeding machine according to claim 3, characterized in that: A motor (22) is provided on the outside of the machine tool (1), a sprocket (23) is provided at the output end of the motor (22) and one end of the transmission wheel (19), and a chain (24) is sleeved on the outside of the sprocket (23).

5. The tile production feeding machine according to claim 1 is characterized by: The plug-in mechanism comprises a push spring (25), a plug-in rod (26) and a plug-in slot (27); the plug-in slot (27) is arranged on the outer side of the connecting pipe (5); one end of the plug-in rod (26) is engaged in the plug-in slot (27); the other end of the plug-in rod (26) is fixedly connected to the movable frame (7); and the push spring (25) can be movably connected to one side of the plug-in rod (26).

6. A feeding machine for tile production according to claim 5, characterized in that: A sealing ring (28) is provided on the outside of the connecting pipe (5), a sealing groove (29) is provided on the inside of the sleeve (6), and the sealing ring (28) is inserted into the sealing groove (29).

7. A tile production feeding machine according to any one of claims 1 to 6, characterized in that: The opening and closing mechanism comprises an opening and closing plate (30), a rotating shaft (31), a torsion spring (32) and a connecting rod (33); the opening and closing plate (30) can be movably mounted on both sides of the dust removal box (2), and the two opening and closing plates (30) can be opened and closed in the same side direction; the torsion spring (32) can be movably sleeved on the outside of the rotating shaft (31), and the connecting rod (33) is fixedly connected to both ends of the torsion spring (32).

8. A tile production feeding machine according to claim 7, characterized in that: The opening and closing plate (30) and the dust removal box (2) are both provided with bolts (34), and the connecting rod (33) is fixed to the opening and closing plate (30) and the dust removal box (2) respectively by means of the bolts (34).

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