Universal light metal part packaging device

Abstract

The utility model relates to the technical field of light metal part packaging, in particular to a universal light metal part packaging device which comprises a table body. The conveying mechanism is mounted in the table body; the number of the clamping mechanisms is two, and the two clamping mechanisms are matched to clamp the light metal part; the number of the driving mechanisms is two, and the two driving mechanisms are arranged on the two sides of the surface of the table body correspondingly; the number of the film covering assemblies is two, and the two film covering assemblies are connected with one driving mechanism. By using the device, the number of winding turns is controlled by the first motor, the operation of the device is automatically controlled, the number of winding turns on the surface of the light metal part is conveniently controlled, and the winding efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology for lightweight metal parts, and in particular to a general-purpose packaging device for lightweight metal parts. Background Technology

[0002] Packaging for lightweight metal components primarily targets parts made of lightweight metals such as aluminum, magnesium, and titanium. Its purpose is to protect the product during transportation and storage, preventing damage, corrosion, and contamination. Packaging materials are typically lightweight, sturdy, moisture-proof, and rust-proof, such as plastic film, foam, cardboard boxes, and wooden crates. Packaging methods are designed based on the shape, size, and weight of the components. Protective film can be wrapped around the surface of the metal components, or individual packaging, sets, or pallet packaging can be used. For components susceptible to moisture, desiccants or moisture-proof agents should be placed inside the packaging to maintain internal dryness. Simultaneously, to prevent collisions and friction during transportation, cushioning materials such as foam and bubble wrap should be filled inside the packaging. Furthermore, the packaging must be labeled with product name, specifications, quantity, production date, batch number, and other information for identification and management. For exported products, the packaging standards and requirements of the destination country must also be met, such as markings, stacking layers, and rainproof markings. In summary, packaging for lightweight metal components requires comprehensive consideration of product characteristics, transportation methods, and storage environment to select appropriate packaging materials and methods, ensuring the safety and quality of the product during transportation and storage.

[0003] A search of Chinese patent "A Packaging Device for the Production of Rod-shaped Metal Parts" (publication number CN214825157U) reveals that the device includes a box body and a fixing frame disposed inside the box body. The box body has an internal support plate, and the fixing frame is mounted on the upper surface of the support plate and fixed with bolts. An air bladder is located above the fixing frame. The bottom plate of the box body has a dehumidifying plate. The fixing frame includes a fixing component, a fixing groove, and a locking slot. The fixing component engages with the fixing groove, and the bottom of the locking slot is fixed to the fixing component with bolts. This invention relates to a packaging device for the production of rod-shaped metal parts, and by using this device, the purpose of facilitating the production and use of rod-shaped metal parts is achieved.

[0004] In the existing technology, when packaging light metal parts with a film coating, the light metal is usually placed in a packaging device, and the packaging device wraps the film around the surface of the light metal. After the film is wrapped, the operator cuts off the film and removes the wrapped light metal parts. This method of wrapping metal parts makes it difficult to control the number of wrapping turns and the wrapping efficiency is not high. Utility Model Content

[0005] The purpose of this utility model is to provide a universal packaging device for light metal parts in order to solve the above-mentioned problems. It improves the problem that when packaging light metal parts with film, the light metal is usually placed in the packaging device, the packaging device wraps the film around the surface of the light metal, and then the operator cuts off the film and removes the wrapped light metal parts. This method of wrapping metal parts is not easy to control the number of wrapping turns and has low wrapping efficiency.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a general-purpose packaging device for lightweight metal parts, comprising:

[0007] Table body;

[0008] A conveying mechanism, which is installed inside the table;

[0009] The clamping mechanism is provided in two symmetrical sets, and the clamping mechanism includes clamping plates, the two clamping plates being able to move relative to each other;

[0010] The drive mechanism is provided in two sets, with the two sets of drive mechanisms respectively located on both sides of the surface of the table.

[0011] The coating assembly has two sets, upper and lower, each set connected to one of the drive mechanisms. Each coating assembly includes a second electric push rod, a film clamp, a second slide rail, and a sleeve roller. The second slide rail is connected to the drive mechanism, the film clamp is slidably connected to the second slide rail, the second electric push rod is fixedly connected to one end of the second slide rail, and the extended end of the second electric push rod is fixed to the surface of the film clamp. The sleeve roller is installed in the drive mechanism, which can drive the two sets of coating assemblies to move relative to each other.

[0012] The hot pressing assembly has two sets, upper and lower, each connected to another driving mechanism. Each hot pressing assembly includes a third slide rail, a first hot pressing plate, a second hot pressing plate, and a third electric push rod. The third slide rail is slidably connected to the driving mechanism, the second hot pressing plate is slidably connected to the third slide rail, the first hot pressing plate is fixedly connected to one end of the third slide rail, and the third electric push rod is fixedly connected to the third slide rail. The extended end of the third electric push rod is fixedly connected to the surface of the second hot pressing plate. The driving mechanism can drive the two sets of hot pressing assemblies to move relative to each other.

[0013] Preferably, each clamping mechanism further includes a lifting frame, a first electric push rod, a first cylinder, and a first motor. The lifting frames of the two clamping mechanisms are fixedly connected to the upper sides of the table body. The first cylinder is slidably connected inside the lifting frame. The first electric push rod is fixedly connected to the upper end of the lifting frame. The extended end of the first electric push rod is fixed to the upper end of the first cylinder. The first motor is fixedly connected to the extended end of the first cylinder. The clamping plate is fixedly connected to the output end of the first motor.

[0014] Preferably, each drive mechanism includes an adjustment frame, a second motor, a lifting plate, a bidirectional screw, a mounting frame, a first slide rail, and a fourth electric push rod. Two lifting plates, mounting frames, fourth electric push rods, and first slide rails are provided. Two adjustment frames are fixedly connected to the upper sides of the table body. The bidirectional screw is rotatably connected inside the adjustment frame. The second motor is fixedly connected to the upper end of the adjustment frame, and its output end is fixed to one end of the bidirectional screw. Both lifting plates are slidably connected inside the adjustment frame. The two lifting plates are respectively threaded to two opposite threads of the bidirectional screw. The two mounting frames are respectively fixedly connected to the surfaces of the two lifting plates. The two first slide rails are respectively fixedly connected inside the two mounting frames. The two second slide rails are respectively slidably connected inside the two first slide rails. The two fourth electric push rods are respectively fixedly connected to the surfaces of the two first slide rails, and their extended ends are respectively fixed to the surfaces of the two second slide rails.

[0015] Preferably, both first hot press plates have cutting edges on their surfaces.

[0016] Preferably, the conveying mechanism includes a conveying frame, a conveyor belt, rotating rollers, and a transmission motor. There are two rotating rollers. The conveying frame is fixedly connected to the table body. Both rotating rollers are rotatably connected to the conveying frame. The conveyor belt is driven to the circumferential surfaces of the two rotating rollers. The transmission motor is fixedly connected to the table body. The output end of the transmission motor movably passes through the conveying frame and is fixed to the surface of one of the rotating rollers.

[0017] Preferably, the two rollers are rotatably connected to the surfaces of the two mounting brackets respectively.

[0018] Preferably, both of the first slide rails are fixedly connected with guide rods.

[0019] Preferably, rubber pads are fixedly connected to the surfaces of both clamping plates.

[0020] The beneficial effects of this utility model are:

[0021] 1. In this solution, by using this device, the number of winding turns is controlled by the first motor and the automatic control device is in operation, which makes it easy to control the number of winding turns on the surface of light metal parts and effectively improves the winding efficiency.

[0022] 2. In this solution, rubber pads are fixedly connected to the surfaces of both clamping plates. The rubber pads are used to improve the stability of the two clamping plates when clamping light metal parts. Attached Figure Description

[0023] Figure 1 This is a first-view perspective perspective view of the present invention;

[0024] Figure 2 This is a second-view perspective perspective view of the present invention;

[0025] Figure 3 This utility model Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a partial perspective view of the present invention;

[0027] Figure 5 This utility model Figure 4 A magnified view of a section at point B in the middle.

[0028] In the diagram: 1. Table body; 2. Conveyor frame; 3. Conveyor belt; 4. Lifting frame; 5. First electric push rod; 6. First cylinder; 7. First motor; 8. Clamping plate; 9. Adjusting frame; 10. Second motor; 11. Lifting plate; 12. Mounting frame; 13. First slide rail; 14. Second slide rail; 15. Second electric push rod; 16. Film clamping clamp; 17. Guide rod; 18. First hot press plate; 19. Second hot press plate; 20. Third slide rail; 21. Roller sleeve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In practical implementation: such as Figures 1-5 As shown, a general-purpose packaging device for lightweight metal parts includes:

[0031] The table body 1 comprises a conveying mechanism, a clamping mechanism, a driving mechanism, a film coating assembly, and a hot pressing assembly. The conveying mechanism is installed inside the table body 1. Two clamping mechanisms are provided, each including a clamping plate 8. The two clamping plates 8 are movable relative to each other, and the two sets of clamping mechanisms cooperate to clamp lightweight metal parts. Two driving mechanisms are provided, with each set located on one side of the surface of the table body 1.

[0032] The coating assembly has two sets, upper and lower, each connected to one of the drive mechanisms. The two sets of coating mechanisms cooperate to coat the upper and lower surfaces of the light metal. Each set of coating assemblies includes a second electric push rod 15, a film clamping clamp 16, a second slide rail 14, and a sleeve roller 21. The second slide rail 14 is connected to the drive mechanism, the film clamping clamp 16 is slidably connected to the second slide rail 14, the second electric push rod 15 is fixedly connected to one end of the second slide rail 14, and the extended end of the second electric push rod 15 moves through the second slide rail 14 and is fixed to the surface of the film clamping clamp 16, controlling the film clamping clamp 16 to slide within the second slide rail 14. The sleeve roller 21 is installed in the drive mechanism, which can drive the two sets of coating assemblies to move relative to each other.

[0033] The hot pressing assembly has two sets, upper and lower, and each set of hot pressing assemblies is connected to another set of driving mechanisms. The driving mechanism can drive the two sets of hot pressing assemblies to move relative to each other. The two sets of hot pressing assemblies cooperate to hot press the film onto the surface of a light metal. Each set of hot pressing assemblies includes a third slide rail 20, a first hot pressing plate 18, a second hot pressing plate 19, and a third electric push rod. The third slide rail 20 is slidably connected to the driving mechanism, the second hot pressing plate 19 is slidably connected to the third slide rail 20, the first hot pressing plate 18 is fixedly connected to one end of the third slide rail 20, the third electric push rod is fixedly connected to the third slide rail 20, and the extended end of the third electric push rod is fixedly connected to the surface of the second hot pressing plate 19.

[0034] In this embodiment: the conveying mechanism is installed inside the table 1. The conveying mechanism is used to convey the light metal parts to be coated. Two sets of clamping mechanisms cooperate to lift the light metal parts to a certain height. The coating assembly is divided into upper and lower sets. The surface of the roller 21 is covered with a rolled film. The film is pulled out by the film clamp 16. The upper and lower film clamps 16 pull the film to the upper and lower sides of the light metal parts. The film clamp 16 consists of a slider that slides on the second slide rail 14, two movable hinged clamps and a controller. The slider is connected to the second electric push rod 15. The two movable hinged clamps are located on the surface of the slider and are used to clamp the film. The controller controls the rotation of the clamps to achieve the clamping effect. After the film is located on the upper and lower sides of the light metal parts, the two sets of hot pressing assemblies operate.

[0035] The hot pressing assembly is also divided into upper and lower groups. The first hot pressing plate 18 and the second hot pressing plate 19 on the upper and lower sides are controlled by the drive mechanism to move towards each other. The two first hot pressing plates 18 and the second hot pressing plate 19 on the upper and lower sides generate heat and hot press the film onto the surface of the light metal parts. The hot pressing temperature is controlled so that the film will not break after hot pressing. Then the hot pressing assembly is removed and the first motor 7 is controlled to run. The output end of the first motor 7 drives the light metal parts to rotate through the clamping plate 8, and wraps the film around the surface of the light metal parts. During the winding process, the two first cylinders 6 are controlled to run. The two first cylinders 6 cooperate to indirectly drive the movement of the light metal parts, so that the film is evenly wrapped on the surface of the light metal parts. The number of winding turns is controlled by the first motor 7. The operation of the automatic control device makes it easy to control the number of winding turns on the surface of the light metal parts and effectively improves the winding efficiency. The clamping mechanism can clamp light metal parts of different specifications during operation and has universality.

[0036] like Figures 1-5 As shown, each clamping mechanism includes a lifting frame 4, a first electric push rod 5, a first cylinder 6, a first motor 7, and a clamping plate 8. The lifting frames 4 of the two clamping mechanisms are fixedly connected to the upper sides of the table body 1. The first cylinder 6 is slidably connected inside the lifting frame 4. The first electric push rod 5 is fixedly connected to the upper end of the lifting frame 4. The extended end of the first electric push rod 5 moves through the lifting frame 4 and is fixed to the upper end of the first cylinder 6. The first motor 7 is fixedly connected to the extended end of the first cylinder 6. The clamping plate 8 is fixedly connected to the output end of the first motor 7.

[0037] In this embodiment: the first electric push rod 5 in the clamping mechanism drives the first cylinder 6 connected to its extended end to rise and fall during operation, which is used to control the height adjustment of the light metal parts clamped by the clamping plate 8 to a height that is convenient for film coating. The first cylinder 6 indirectly drives the light metal parts clamped by the clamping plate 8 to move horizontally during operation. The first motor 7 drives the light metal parts clamped by the clamping plate 8 to rotate during operation.

[0038] like Figures 1-5As shown, each drive mechanism includes an adjustment frame 9, a second motor 10, a lifting plate 11, a bidirectional screw, a mounting frame 12, a first slide rail 13, and a fourth electric push rod. There are two lifting plates 11, two mounting frames 12, two electric push rods, and two first slide rails 13. The adjustment frames 9 of the two drive mechanisms are fixedly connected to the upper two sides of the table body 1. The bidirectional screw is rotatably connected inside the adjustment frame 9. The second motor 10 is fixedly connected to the upper end of the adjustment frame 9. The output end of the second motor 10 movably passes through the adjustment frame 9 and is fixed to one end of the bidirectional screw. The two lifting plates 11 are slidably connected inside the adjustment frame 9. The two lifting plates 11 are respectively threaded to the two opposite threads of the bidirectional screw. The two mounting frames 12 are respectively fixedly connected to the surfaces of the two lifting plates 11. The two first slide rails 13 are respectively fixedly connected inside the two mounting frames 12. Two second slide rails 14 are slidably connected to two first slide rails 13 of one set of drive mechanisms, and two fourth electric push rods are fixedly connected to the surfaces of the two first slide rails 13. The extended ends of the two fourth electric push rods pass through the two first slide rails 13 and are fixed to the surfaces of the two second slide rails 14. Two third slide rails 20 are slidably connected to two first slide rails 13 of another set of drive mechanisms and are also driven by fourth electric push rods.

[0039] In this embodiment: The second motor 10 in one of the drive mechanisms drives the bidirectional screw connected to its output end to rotate during operation. As the bidirectional screw rotates, it drives two lifting plates 11 to move. The two lifting plates 11 move simultaneously in opposite directions, indirectly moving the film to the upper and lower surfaces of the lightweight metal component. Subsequently, another drive mechanism drives the hot-pressing assembly to move towards each other in the same manner.

[0040] like Figures 1-5 As shown, the surfaces of the two first hot press plates 18 are provided with knife edges.

[0041] In this embodiment, two first hot press plates with 18 cutting edges are used to cut the thin film on the surface of the wound light metal parts.

[0042] like Figures 1-5 As shown, the conveying mechanism includes a conveyor frame 2, a conveyor belt 3, rotating rollers, and a transmission motor. There are two rotating rollers. The conveyor frame 2 is fixedly connected inside the table body 1. Both rotating rollers are rotatably connected inside the conveyor frame 2. The conveyor belt 3 is driven to the circumferential surface of the two rotating rollers. The transmission motor is fixedly connected inside the table body 1. The output end of the transmission motor movably passes through the conveyor frame 2 and is fixed to the surface of one of the rotating rollers.

[0043] In this embodiment: the transmission motor in the conveying mechanism drives the rotating roller connected to its output end to rotate when it is running. The rotating roller drives the conveyor belt 3 to rotate, and the conveyor belt 3 drives the light metal parts to be coated to move.

[0044] like Figures 1-5 As shown, two rollers 21 are rotatably connected to the surfaces of two mounting brackets 12.

[0045] In this embodiment: the sleeve roller 21 is used to mount the rolled film.

[0046] like Figures 1-5 As shown, both first slide rails 13 are fixedly connected to guide rods 17.

[0047] In this embodiment, the film passes through the surface of the guide rod 17 when pulled by the film clamp 16.

[0048] like Figures 1-5 As shown, rubber pads are fixedly connected to the surfaces of both clamping plates 8.

[0049] In this embodiment, the rubber pad is used to improve the stability of the two clamping plates 8 when clamping the light metal parts.

[0050] It should be noted that the first electric push rod 5, the first cylinder 6, the first motor 7, the second motor 10, the second electric push rod 15, the first hot press plate 18, the second hot press plate 19, the third electric push rod, the transmission motor, and the fourth electric push rod used in this device are all existing technologies. The specific models of the first electric push rod 5, the first cylinder 6, the first motor 7, the second motor 10, the second electric push rod 15, the first hot press plate 18, the second hot press plate 19, the third electric push rod, the transmission motor, and the fourth electric push rod can be selected according to actual needs, and will not be elaborated on here.

[0051] In use, this device first controls the conveying mechanism to transport the light metal parts to be coated. Then, through the cooperation of two sets of clamping mechanisms, the light metal parts are lifted to a certain height. The coating assembly is divided into upper and lower groups. A rolled film is sleeved on the surface of the roller 21. The second slide rail 14 is driven by the drive mechanism to slide out from the first slide rail 13, and then the film clamping clamp 16 pulls the film out. The upper and lower clamping clamps 16 pull the film to the upper and lower sides of the light metal parts. The clamping clamp 16 consists of a slider that slides on the second slide rail 14, two movable hinged clamping plates, and a controller. The slider is connected to the second electric push rod 15. The two movable hinged clamping plates are located on the surface of the slider and are used to clamp the film. The controller controls the rotation of the clamping plates to achieve the clamping effect. After the film is located on the upper and lower sides of the light metal parts, the two sets of hot pressing assemblies are operated. The hot pressing assemblies are also divided into upper and lower groups. The third slide rail 20 slides out from the first slide rail 13 and is driven by the drive mechanism. The first hot press plate 18 and the second hot press plate 19 on the upper and lower sides move towards each other. The two first hot press plates 18 and the second hot press plate 19 on the upper and lower sides generate heat and hot press the film onto the surface of the light metal parts. The hot pressing temperature is controlled so that the film will not break after hot pressing. Then the hot pressing assembly is removed and the first motor 7 is controlled to run. The output end of the first motor 7 drives the light metal parts to rotate through the clamping plate 8 and wraps the film around the surface of the light metal parts. During the winding process, the two first cylinders 6 are controlled to run. The two first cylinders 6 cooperate to indirectly drive the movement of the light metal parts, so that the film is evenly wrapped on the surface of the light metal parts. By using this device, the number of winding turns is controlled by the first motor 7 and the automatic control device is running, which makes it easy to control the number of winding turns on the surface of the light metal parts and effectively improves the winding efficiency.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A general-purpose packaging device for lightweight metal parts, characterized in that, include: Table body (1); A conveying mechanism, which is installed inside the table body (1); The clamping mechanism is provided in two symmetrical sets, and the clamping mechanism includes clamping plates (8), which can move relative to each other; The driving mechanism is provided in two sets, and the two sets of driving mechanisms are respectively located on both sides of the surface of the table body (1); The coating assembly has two sets, upper and lower, and each set of coating assemblies is connected to one of the drive mechanisms. Each coating assembly includes a second electric push rod (15), a film clamp (16), a second slide rail (14), and a sleeve roller (21). The second slide rail (14) is connected to the drive mechanism. The film clamp (16) is slidably connected to the second slide rail (14). The second electric push rod (15) is fixedly connected to one end of the second slide rail (14). The extended end of the second electric push rod (15) is fixed to the surface of the film clamp (16). The sleeve roller (21) is installed in the drive mechanism, which can drive the two sets of coating assemblies to move relative to each other. The hot pressing assembly has two sets, upper and lower, and each set of hot pressing assemblies is connected to another set of driving mechanisms. Each hot pressing assembly includes a third slide rail (20), a first hot pressing plate (18), a second hot pressing plate (19), and a third electric push rod. The third slide rail (20) is slidably connected to the driving mechanism, the second hot pressing plate (19) is slidably connected to the third slide rail (20), the first hot pressing plate (18) is fixedly connected to one end of the third slide rail (20), the third electric push rod is fixedly connected to the third slide rail (20), and the extended end of the third electric push rod is fixedly connected to the surface of the second hot pressing plate (19). The driving mechanism can drive the two sets of hot pressing assemblies to move relative to each other.

2. The universal packaging device for lightweight metal parts according to claim 1, characterized in that: The clamping mechanism also includes a lifting frame (4), a first electric push rod (5), a first cylinder (6) and a first motor (7). The lifting frame (4) of the two clamping mechanisms is fixedly connected to the upper two sides of the table body (1). The first cylinder (6) is slidably connected inside the lifting frame (4). The first electric push rod (5) is fixedly connected to the upper end of the lifting frame (4). The extended end of the first electric push rod (5) is fixed to the upper end of the first cylinder (6). The first motor (7) is fixedly connected to the extended end of the first cylinder (6). The clamping plate (8) is fixedly connected to the output end of the first motor (7).

3. The universal packaging device for lightweight metal parts according to claim 2, characterized in that: Each set of drive mechanisms includes an adjustment frame (9), a second motor (10), a lifting plate (11), a bidirectional screw, a mounting frame (12), a first slide rail (13), and a fourth electric push rod. Two lifting plates (11), two mounting frames (12), two electric push rods, and two first slide rails (13) are provided. Two adjustment frames (9) are fixedly connected to the upper sides of the table body (1). The bidirectional screw is rotatably connected inside the adjustment frame (9). The second motor (10) is fixedly connected to the upper end of the adjustment frame (9). The output end of the second motor (10) is fixed to one end of the bidirectional screw. The two lifting plates (9) are... The lowering plates (11) are slidably connected to the adjusting frame (9). The two lifting plates (11) are respectively connected to the two opposite threads of the bidirectional screw. The two mounting frames (12) are respectively fixedly connected to the surfaces of the two lifting plates (11). The two first slide rails (13) are respectively fixedly connected to the two mounting frames (12). The two second slide rails (14) are respectively slidably connected to the two first slide rails (13). The two fourth electric push rods are respectively fixedly connected to the surfaces of the two first slide rails (13). The extended ends of the two fourth electric push rods are respectively fixed to the surfaces of the two second slide rails (14).

4. A general-purpose packaging device for lightweight metal parts according to claim 3, characterized in that: Both of the first hot press plates (18) have knife edges on their surfaces.

5. A general-purpose packaging device for lightweight metal parts according to claim 4, characterized in that: The conveying mechanism includes a conveyor frame (2), a conveyor belt (3), rotating rollers and a transmission motor. There are two rotating rollers. The conveyor frame (2) is fixedly connected to the table body (1). Both rotating rollers are rotatably connected to the conveyor frame (2). The conveyor belt (3) is driven to the circumferential surface of the two rotating rollers. The transmission motor is fixedly connected to the table body (1). The output end of the transmission motor moves through the conveyor frame (2) and is fixed to the surface of one of the rotating rollers.

6. A general-purpose packaging device for lightweight metal parts according to claim 5, characterized in that: The two rollers (21) are rotatably connected to the surfaces of the two mounting brackets (12).

7. A general-purpose packaging device for lightweight metal parts according to claim 6, characterized in that: Both of the first slide rails (13) are fixedly connected to guide rods (17).

8. A general-purpose packaging device for lightweight metal parts according to claim 7, characterized in that: Rubber pads are fixedly connected to the surfaces of both clamping plates (8).

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