Feeding and plate dividing device of double-row drying furnace for roller painting of automobile aluminum interior trim panel
The automated diversion control of sensing devices and lifting mechanisms has solved the problems of insufficient capacity utilization of roller coating machines and product contamination and jamming caused by manual panel separation, thus achieving an efficient and stable drying process for aluminum interior panels.
Patent Information
- Application Number
- CN202423114776.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In the current production process, the production speed of the roller coating machine is much higher than that of the single-row drying oven, resulting in the ineffective utilization of the roller coating machine's capacity. Furthermore, manual panel separation can easily contaminate the wet paint film, leading to product defects. In addition, the unstable separation position can easily cause products to get stuck in the drying oven.
An induction device is used to count the odd and even numbers of the roll-coated aluminum interior panels. The lifting mechanism controlled by the industrial control computer automatically distributes the roll-coated aluminum interior panels to different material output positions of the double-row drying oven, realizing automated diversion and avoiding manual operation and pollution.
It improves the production efficiency of the roller coating machine, makes full use of the capacity, reduces product defects, saves manpower, increases the product qualification rate, and avoids jamming in the drying oven.
Smart Images
Figure CN223547148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum interior panel roller coating paint drying and feeding technology, specifically to a feeding and separating device for a double-row drying oven for automotive aluminum interior panel roller coating paint that can improve the production efficiency of roller coating machines. Background Technology
[0002] In the current production process, after the automotive aluminum interior panels are coated with paint by roller, they are connected to the drying oven for baking. The production speed of the roller coating machine is much higher than that of the single-row drying oven, which leads to the ineffective utilization of the roller coating machine's capacity and low output. Alternatively, the roller-coated products can be manually distributed to the double-row drying oven to avoid wasting the roller coating machine's capacity. However, manual distribution can easily contaminate the wet paint film, causing product defects and waste. Furthermore, the unstable distribution position can easily cause products to get stuck in the drying oven. Utility Model Content
[0003] To address the shortcomings of the aforementioned technologies, this utility model provides a feeding and separating device for a double-row drying oven for roller coating of automotive aluminum interior panels, which can improve the production efficiency of roller coating machines.
[0004] The technical solution adopted by this utility model to achieve the above-mentioned technical effects is:
[0005] A feeding and separating device for a double-row drying oven for roller-coated aluminum interior panels in automobiles includes a feeding roller conveyor line. A separating roller conveyor line is connected to the downstream end of the feeding roller conveyor line. The separating roller conveyor line has at least two parallel and synchronous separating output positions. At the upstream end of one of the separating output positions aligned with the feeding roller conveyor line, a lifting mechanism is provided below its roller, which can be controlled to lift and horizontally transfer the fed roller-coated aluminum interior panels to the other separating output position. A sensing device for odd / even counting of the roller-coated aluminum interior panels is provided in the connection area between the feeding roller conveyor line and the separating roller conveyor line. An industrial control computer is electrically connected to the sensing device and controls the lifting mechanism to release odd-counted roller-coated aluminum interior panels to one of the separating output positions aligned with the feeding roller conveyor line, and to lift and separate even-counted roller-coated aluminum interior panels to the other separating output position.
[0006] Preferably, in the above-mentioned feeding and separating device of the double-row drying oven for automotive aluminum interior panel roller coating, the downstream end of the separating roller conveyor line is connected to the furnace chamber of the double-row drying oven in a one-to-one correspondence.
[0007] Preferably, in the feeding and separating device of the above-mentioned double-row drying oven for roller coating of automotive aluminum interior panels, there are two material output positions.
[0008] Preferably, in the above-mentioned feeding and separating device of the double-row drying oven for roller coating of automotive aluminum interior panels, the sensing device includes an odd-even counting sensor, a tail sensor, and a head sensor arranged along the conveying direction. The odd-even counting sensor and the tail sensor are located at the downstream end of the feeding roller conveyor line. The tail sensor is used to detect the tail end signal of the roller-coated aluminum interior panel to be separated, and the head sensor is located at the upstream end of the separating roller conveyor line to detect the front end signal of the roller-coated aluminum interior panel to be separated.
[0009] Preferably, in the above-mentioned feeding and separating device of the double-row drying oven for automotive aluminum interior panel roller coating, the lifting mechanism includes several lifting plates arranged in a row between the roller gaps of the separating roller conveyor line. A plate seat is provided below the lifting plate, and a sliding plate that can be laterally reciprocated between the two separating output positions is provided below the plate seat. A lifting cylinder is fixed on the sliding plate, and the telescopic rod of the lifting cylinder is fixed to the plate seat. A guide rod is connected between the plate seat and the sliding plate.
[0010] Preferably, in the above-mentioned feeding and separating device of the double-row drying oven for roller coating of automotive aluminum interior panels, a first slide rail seat and a second slide rail seat are provided below the slide plate. The two sides of the slide plate are slidably connected to the slide rails of the first slide rail seat and the second slide rail seat respectively by sliders. The first slide rail seat is provided with an elongated travel groove parallel to the slide rail. A lead screw is provided on the lower surface of the first slide rail seat at the position corresponding to the travel groove. The nut seat on the lead screw is fixedly connected to the slide plate through a linkage plate. Guide rods that slide through the nut seat are provided on both sides of the lead screw.
[0011] Preferably, in the above-mentioned feeding and separating device of the double-row drying oven for roller coating of automotive aluminum interior panels, the lower surface of the first slide rail seat is provided with anti-overtravel sensors at both ends of the travel groove.
[0012] Preferably, in the above-mentioned feeding and separating device of the double-row drying oven for roller coating of automotive aluminum interior panels, the lifting plate is a strip-shaped structure with rubber rims formed at both ends, and the bottom ends of the lifting plate are fixed to the plate base by columns.
[0013] Preferably, in the feeding and separating device of the above-mentioned double-row drying oven for automotive aluminum interior panel roller coating, the roller surfaces of both the feeding roller conveyor line and the separating roller conveyor line are coated with Teflon material.
[0014] Preferably, the feeding and separating device of the above-mentioned double-row drying oven for automotive aluminum interior panel roller coating also includes a dust cover with open front and rear ends, and the feeding roller conveyor line and the separating roller conveyor line are arranged in the dust cover.
[0015] The beneficial effects of this utility model are as follows: This utility model uses a sensing device to count the odd and even numbers of the roller-coated aluminum interior panels passing through the area where the feeding roller conveyor line and the distributing roller conveyor line connect. Based on the odd and even number count, the lifting mechanism automatically distributes the roller-coated aluminum interior panels to two different distributing output positions on the distributing roller conveyor line. This allows the roller-coated aluminum interior panels to enter both sides of the double-row drying oven according to the odd and even number counts, which can fully utilize the capacity of the roller coating machine, increase output, eliminate the need for manual operation, save manpower, and prevent personnel from contacting the roller-coated aluminum interior panels, thus avoiding contamination of the paint film on the roller-coated aluminum interior panels and significantly improving the product qualification rate. Attached Figure Description
[0016] Figure 1 This is a perspective view of the present invention in one state;
[0017] Figure 2 This is a perspective view of the present invention from another angle under one state.
[0018] Figure 3 This is a top view of the present invention in one state;
[0019] Figure 4 This is a schematic diagram of the material distribution output position of the material distribution roller conveyor line described in this utility model;
[0020] Figure 5 This is a perspective view of the lifting mechanism described in this utility model.
[0021] Figure 6 This is an assembly diagram of the lifting mechanism and the material distribution roller conveyor line described in this utility model;
[0022] Figure 7 This is a diagram showing the lifting mechanism described in this utility model below the material distribution roller conveyor line;
[0023] Figure 8 This is a near-ground perspective view of the lifting mechanism described in this utility model;
[0024] Figure 9 This is a front view of the lifting mechanism described in this utility model;
[0025] Figure 10 This is a side view of the lifting mechanism described in this utility model;
[0026] Figure 11 This is a perspective view of an embodiment of the present utility model. Detailed Implementation
[0027] To provide a further understanding of this utility model, the following description, with reference to the accompanying drawings and specific embodiments, will further illustrate the utility model:
[0028] In the description of this utility model, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the figure, an embodiment of this utility model proposes a feeding and separating device for a double-row drying oven for automotive aluminum interior trim panels coated with paint by a roller coater. This feeding and separating device is used to feed the aluminum interior trim panels coated with paint by the roller coater into the double-row drying oven for baking. This allows the roller coater, with its higher production speed, to feed the coated aluminum interior trim panels into the double-row drying oven in an orderly and uninterrupted manner for drying, so that the production efficiency of the roller coater is not limited by the relatively lower drying efficiency of the single-row drying oven. Specifically, the feeding and separating device includes a feeding roller conveyor line 1, and a separating roller conveyor line 2 is connected to the downstream end of the feeding roller conveyor line 1. Wherein, as... Figure 4 As shown, the material distribution roller conveyor line 2 has at least two parallel and synchronous material distribution output positions A and B. Material distribution output position A is aligned with the feeding roller conveyor line 1 on a single transmission path, while material distribution output position B deviates from the transmission path of the feeding roller conveyor line 1. The aluminum interior trim panels conveyed downwards from material distribution output positions A and B respectively enter the corresponding furnace chambers of the double-row drying oven connected to them. Specifically, at the upstream end of one of the material distribution output positions A aligned with the feeding roller conveyor line 1, a controllable lifting mechanism 3 is provided below the rollers of the material distribution roller conveyor line 2 to lift and horizontally transfer the roll-coated aluminum interior trim panels fed from the feeding roller conveyor line 1 to the material distribution roller conveyor line 2 to the other material distribution output position B. It should be noted that... Figure 1 , Figure 2 and Figure 3The position of the lifting mechanism 3 shown is its state after it has been horizontally transferred from the material output position A to the material output position B. In the initial state, the lifting mechanism 3 is located on one side of the material output position A.
[0031] like Figure 4 As shown, in order to control the paint splitting of the roller-coated aluminum interior panels conveyed downward by the feeding roller conveyor line 1, a sensing device is provided in the connection area between the feeding roller conveyor line 1 and the distributing roller conveyor line 2. This sensing device is used to count the odd and even numbers of the roller-coated aluminum interior panels. The roller-coated aluminum interior panels with odd numbers enter the distributing output position A of the distributing roller conveyor line 2, and the roller-coated aluminum interior panels with even numbers enter the distributing output position B of the distributing roller conveyor line 2. The orderly and uninterrupted splitting paint control is achieved by counting the odd and even numbers of the roller-coated aluminum interior panels.
[0032] Specifically, in a preferred embodiment of this invention, the sensing device is electrically connected to an industrial control computer. The sensing device sends the odd / even counting signal of the roller-coated aluminum interior panel to the industrial control computer. Based on the received odd / even counting signal, the industrial control computer controls the lifting mechanism 3 to perform a diversion action on the roller-coated aluminum interior panel currently passing above it. Specifically, when the industrial control computer receives the odd-count signal sent by the sensing device, it controls the lifting mechanism 3 to release the passing odd-count roller-coated aluminum interior panel to one of the material output positions A aligned with the feed roller conveyor line 1; when the industrial control computer receives the even-count signal sent by the sensing device, it controls the lifting mechanism 3 to lift and divert the passing even-count roller-coated aluminum interior panel to another material output position B. Through the above-mentioned odd / even counting diversion painting, the roller-coated aluminum interior panels produced by the roller coating machine can be orderly and continuously diverted and fed into the downstream double-row drying oven to complete the painting.
[0033] Furthermore, in a preferred embodiment of this utility model, the downstream end of the material distribution output position of the material distribution roller conveyor line 2 is connected one-to-one with the furnace chamber of the double-row drying oven. As a preferred embodiment of this utility model, there are two material distribution output positions, namely... Figure 4 The material output positions A and B are shown.
[0034] In some other embodiments, the material distribution output position of the material distribution roller conveyor line 2 can also be three. Correspondingly, three rows of drying ovens are connected to the downstream end of the material distribution roller conveyor line 2, with each material distribution output position corresponding to one drying oven.
[0035] Furthermore, in a preferred embodiment of this utility model, such as Figure 4As shown, the sensing device includes an odd / even counting sensor 4, a tail sensor 41, and a head sensor 42 arranged along the conveying direction. The odd / even counting sensor 4 and the tail sensor 41 are located at the downstream end of the feed roller conveyor line 1. The tail sensor 41 detects the tail end signal of the roll-coated aluminum interior panel to be separated. The head sensor 42 is located at the upstream end of the separating roller conveyor line 2 and detects the front end signal of the roll-coated aluminum interior panel to be separated. During the conveying process of the roll-coated aluminum interior panel on the feed roller conveyor line 1, when the front end of the roll-coated aluminum interior panel, i.e., the head, passes the odd / even counting sensor 4 (at this time, the head obstructs the odd / even counting sensor 4), the odd / even counting sensor 4 can determine whether the currently passing roll-coated aluminum interior panel is counted as an even or odd number based on the system count. This odd / even counting signal is uploaded by the odd / even counting sensor 4 to the industrial control computer, which records the current odd / even counting signal of the roll-coated aluminum interior panel. As the roll-coated aluminum interior trim panel continues to be conveyed forward, when its tail leaves the tail sensor 41 and its head is in the state of blocking the head sensor 42, if the number of roll-coated aluminum interior trim panels is odd, the industrial control computer controls the lifting mechanism 3 not to lift it. At this time, the odd-numbered roll-coated aluminum interior trim panel enters the material distribution output position A of the material distribution roller conveyor line 2. If the number of roll-coated aluminum interior trim panels is even, the industrial control computer controls the lifting mechanism 3 to lift it upward. At this time, the even-numbered roll-coated aluminum interior trim panel enters the material distribution output position B of the material distribution roller conveyor line 2.
[0036] Furthermore, in a preferred embodiment of this utility model, such as Figures 5 to 10 As shown, the lifting mechanism 3 includes several lifting plates 31 arranged in a straight line between the roller gaps of the material distribution roller conveyor line 2. The lifting plates 31 can freely pass through the roller gaps of the material distribution roller conveyor line 2. When raised, the lifting plates 31 are located above the upper surface of the rollers of the material distribution roller conveyor line 2; when lowered and reset, the lifting plates 31 are located below the lower surface of the rollers of the material distribution roller conveyor line 2. Specifically, as shown... Figure 5 and Figure 8 As shown, a plate base 32 is provided below the lifting plate 31, and a sliding plate 33 is provided below the plate base 32, which can laterally reciprocate between the two material output positions. With the lateral sliding of the sliding plate 33, the entire lifting plate 31 and its plate base 32 move between material output position A and material output position B. To control the upward lifting and downward resetting of the lifting plate 31, as shown... Figure 8 , Figure 9 and Figure 10As shown, a lifting cylinder 34 is fixed on the slide plate 33. The telescopic rod of the lifting cylinder 34 is fixed to the plate base 32, and a guide rod 321 connects the plate base 32 and the slide plate 33. When the telescopic rod of the lifting cylinder 34 extends, it drives the plate base 32 and the entire lifting plate 31 to move upward to a preset height until the entire lifting plate 31 is above the upper surface of the roller of the material distribution roller conveyor line 2, so as to lift the roller-coated aluminum interior panel located on the upper surface of the roller and detach it from the roller (at this time, it is located at the material distribution output position A). When the even-numbered roller-coated aluminum interior panel is transferred to the area above the material distribution output position B, the telescopic rod of the lifting cylinder 34 retracts by one stroke until the entire lifting plate 31 is above the lower surface of the roller of the material distribution roller conveyor line 2, thereby causing the roller-coated aluminum interior panel to detach from the entire lifting plate 31 and fall onto the roller (at this time, it is located at the material distribution output position B).
[0037] Furthermore, in a preferred embodiment of this utility model, such as Figure 5 and Figure 8 As shown, a first slide rail seat 35 and a second slide rail seat 36 are provided below the slide plate 33. The two sides of the slide plate 33 are slidably connected to the slide rails of the first slide rail seat 35 and the second slide rail seat 36 via sliders, respectively. To drive the slide plate 33 to move laterally between the material output position A and the material output position B, as shown... Figure 8 As shown, the first slide rail seat 35 has a long, narrow travel groove 351 parallel to the slide rail. A lead screw 37 is located on the lower surface of the first slide rail seat 35 at the position corresponding to the travel groove 351. A nut seat 371 on the lead screw 37 is fixedly connected to the slide plate 33 via a linkage plate 331. Guide rods 372 are slidably connected to the nut seat 371 on both sides of the lead screw 37. When the lead screw 37 rotates, it drives the nut seat 371 to move the linkage plate 331, the slide plate 33, its plate seat 32, and the entire lifting plate 31 laterally between the material output position A and the material output position B. To avoid overtravel, such as... Figure 8 and Figure 9 As shown, the lower surface of the first slide rail seat 35 is provided with anti-overtravel sensors 38 at both ends of the travel groove 351.
[0038] Furthermore, in a preferred embodiment of this utility model, such as Figure 5As shown, the support plate 31 is a strip-shaped structure with rubber ridges 311 formed at both ends. The rubber ridges 311 flexibly contact the front (lower surface) of the roll-coated aluminum interior panel, avoiding surface scratches caused by rigid contact and contamination of the back (upper surface) of the roll-coated aluminum interior panel. The bottom ends of the support plate 31 are fixed to the plate base 32 by columns 312. The roller surfaces of both the feeding roller conveyor line 1 and the distributing roller conveyor line 2 are coated with Teflon material. In the embodiment of this utility model, the feeding roller conveyor line 1 is a short roller 11, and the distributing roller conveyor line 2 is a long roller 21. As a preferred embodiment of this utility model, the length of the short roller 11 is half the length of the long roller 21, that is, the distributing roller conveyor line 2 has a distributing output position. To avoid dust contamination, such as Figure 11 As shown, the feeding and separating plate device of this utility model also includes a dust cover 5 with open front and rear ends, wherein the feeding roller conveyor line 1 and the separating roller conveyor line 2 are arranged in the dust cover 5.
[0039] This utility model's feeding and sorting device can automatically sort roll-coated aluminum interior panels to both sides of a double-row drying oven according to odd and even numbers, eliminating the need for manual operation, saving manpower, and significantly reducing product defects. It can sort aluminum plates of various sizes within the range of 0.5mm to 1mm thickness, 510mm to 610mm width, and 530mm to 1500mm length. The sorting speed can meet the production capacity requirements of double-row drying ovens with a plate spacing of less than 150mm. After the previous aluminum plate is sorted, the support fixture returns to its original position from below the aluminum plate without affecting the normal conveying of the next aluminum plate. The sorting effect is stable and does not easily cause aluminum plates to jam in the drying oven. The rollers are coated with Teflon, which is resistant to corrosion from roller-coated paint solvents, wear-resistant, and easy to clean. The sorting uses a lifting method, preventing contamination of the back of the aluminum plates throughout the process.
[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.
Claims
1. A feeding and separating device for a double-row drying oven for roller coating of automotive aluminum interior panels, comprising a feeding roller conveyor line (1), characterized in that, The downstream end of the feeding roller conveyor line (1) is connected to the distributing roller conveyor line (2). The distributing roller conveyor line (2) has at least two parallel and synchronous distributing output positions. At the upstream end of one of the distributing output positions aligned with the feeding roller conveyor line (1), a lifting mechanism (3) is provided below its roller that can be controlled to lift up the fed roller-coated aluminum interior panels and transfer them horizontally to the other distributing output position. A sensing device for counting odd and even numbers of roller-coated aluminum interior panels is provided in the connection area between the feeding roller conveyor line (1) and the distributing roller conveyor line (2). The industrial control computer is electrically connected to the sensing device and is used to control the lifting mechanism (3) to release the odd-numbered roller-coated aluminum interior panels to one of the distributing output positions aligned with the feeding roller conveyor line (1) and to lift and distribute the even-numbered roller-coated aluminum interior panels to the other distributing output position.
2. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 1, characterized in that, The downstream end of the material distribution output position of the material distribution roller conveyor line (2) is connected to the furnace chamber of the double-row drying oven in a one-to-one correspondence.
3. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 1, characterized in that, There are two material dispensing output positions.
4. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 1, characterized in that, The sensing device includes an odd / even counting sensor (4), a tail plate sensor (41), and a head plate sensor (42) arranged along the conveying direction. The odd / even counting sensor (4) and the tail plate sensor (41) are located at the downstream end of the feed roller conveyor line (1). The tail plate sensor (41) is used to detect the tail end signal of the aluminum interior trim panel to be rolled and coated. The head plate sensor (42) is located at the upstream end of the sorting roller conveyor line (2) and is used to detect the front end signal of the aluminum interior trim panel to be rolled and coated.
5. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 1, characterized in that, The lifting mechanism (3) includes several lifting plates (31) arranged in a row between the roller gaps of the material distribution roller conveyor line (2). A plate base (32) is provided below the lifting plate (31). A sliding plate (33) that can be laterally reciprocated between the two material distribution output positions is provided below the plate base (32). A lifting cylinder (34) is fixed on the sliding plate (33). The telescopic rod of the lifting cylinder (34) is fixed to the plate base (32). A guide rod (321) is connected between the plate base (32) and the sliding plate (33).
6. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 5, characterized in that, The slide plate (33) is provided with a first slide rail seat (35) and a second slide rail seat (36) below it. The two sides of the slide plate (33) are slidably connected to the slide rails of the first slide rail seat (35) and the second slide rail seat (36) respectively by sliders. The first slide rail seat (35) is provided with a long strip-shaped travel groove (351) parallel to the slide rail. The lower surface of the first slide rail seat (35) is provided with a lead screw (37) at the position corresponding to the travel groove (351). The nut seat (371) on the lead screw (37) is fixedly connected to the slide plate (33) through a linkage plate (331). The two sides of the lead screw (37) are provided with guide rods (372) that slide through the nut seat (371).
7. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 6, characterized in that, The lower surface of the first slide rail seat (35) is provided with anti-overtravel sensors (38) at both ends of the travel slot (351).
8. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 5, characterized in that, The lifting plate (31) is a strip-shaped structure with rubber rims (311) formed at both ends. The bottom ends of the lifting plate (31) are fixed to the plate base (32) by columns (312).
9. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 1, characterized in that, The roller surfaces of both the feeding roller conveyor line (1) and the distributing roller conveyor line (2) are coated with Teflon material.
10. The feeding and separating device for the double-row drying oven for roller coating of automotive aluminum interior panels according to claim 1, characterized in that, It also includes a dust cover (5) with open front and rear ends, and the feeding roller conveyor line (1) and the distributing roller conveyor line (2) are located in the dust cover (5).