A tile turning machine for tile production

Abstract

The utility model relates to a turning machine technical field, the utility model provides a ceramic tile turning machine for ceramic tile production, the side of rack is provided with the conveying line, the utility model provides a ceramic tile turning machine for ceramic tile production, the mutual cooperation between the conveying cylinder, the spring piece, the foam sponge etc. Component in the turning buffer shock attenuation subassembly, the spring piece, foam sponge and spring telescopic rod collaborative buffer have been realized, can effectively absorb the vibration impact when the ceramic piece is placed, avoid the ceramic tile glaze surface scratch or corner broken, guarantee the appearance of ceramic tile is intact after turning, spring telescopic rod can drive spring piece automatic reset, need not manual intervention just can continuously cope with the follow -up vibration, adapt the assembly line continuous operation, solve the technical problem that a ceramic tile turning machine for ceramic tile production in the prior art cannot effectively absorb the vibration impact when the ceramic piece is placed, avoid the ceramic tile glaze surface scratch or corner broken, guarantee the appearance of ceramic tile is intact after turning.

Description

Technical Field

[0001] This utility model relates to the field of turning machine technology, specifically to a tile turning machine for tile production. Background Technology

[0002] A tile turning machine is a piece of equipment used in the tile production process. Its main function is to flip (or turn) cut tiles 180 degrees to facilitate subsequent processing or packaging. In tile production, after the tiles are cut, they need to be repositioned by the turning machine to ensure that the front of the tile is facing up or arranged in a specific direction.

[0003] According to a public disclosure of a large slab turning machine for ceramic tile production (publication number: CN 216463610 U), it includes a frame, a conveying roller assembly on the frame, a lifting assembly on the frame, a pushing assembly at the top of the lifting assembly for lifting the ceramic tile, a connecting plate fixedly connected to the frame, the connecting plate being located above the conveying roller assembly, a rotating disk connected to the connecting plate via a rotating mechanism, and multiple negative pressure suction cups for fixing the ceramic tile being fixedly connected to the bottom of the rotating disk.

[0004] The aforementioned method, which relies on the cooperation of components such as conveyor rollers and frames, is insufficient to effectively absorb the vibration and impact during the placement of ceramic tiles, prevent scratches on the glaze or chipping at the edges, and ensure the integrity of the tiles after they are turned over. This results in instability in the conveying process after the ceramic tiles are turned over, leading to scratches on the glaze or chipping at the edges, which affects the integrity of the glaze and needs improvement. Utility Model Content

[0005] To overcome the above-mentioned defects, the present invention provides a tile turning machine for tile production, which solves the technical problem in the prior art that cannot effectively absorb the vibration and impact when placing ceramic tiles, avoid scratching the glaze or cracking the edges and corners of the tiles, and ensure the integrity of the tile appearance after turning.

[0006] According to one aspect, at least one embodiment of the present invention provides a tile turning machine for tile production, comprising a frame, a conveyor line disposed on the side of the frame, a robotic arm disposed on the top of the frame, a turning actuator disposed on the side of the conveyor line, a control system disposed on the side of the turning actuator, a photoelectric sensor disposed on the side of the turning actuator, a turning buffer and shock absorption assembly disposed on the side of the conveyor line, the turning buffer and shock absorption assembly comprising a conveyor roller, one end of the conveyor roller disposed on the side of the conveyor line, a spring sheet disposed on the inner wall of the conveyor roller, foam sponge disposed on the inner wall of the conveyor roller, a support rod fixedly connected to the inner wall of the conveyor roller, a spring telescopic rod fixedly connected to the top of the support rod, and the end of the spring telescopic rod away from the support rod fixedly connected to the side of the spring sheet.

[0007] For example, in at least one embodiment of this utility model, a ceramic tile turning machine for ceramic tile production is provided, which further includes: a plurality of conveying rollers are arranged in a linear array on the side of the conveying line, which is beneficial for stable conveying of ceramic tiles.

[0008] For example, in at least one embodiment of this utility model, a tile turning machine for tile production is provided, which further includes: the surface of the foamed sponge is provided with grooves, and a plurality of grooves are provided; two spring pieces are provided and are symmetrical to each other along the vertical central axis of the conveying roller; the design of the foamed sponge helps the spring pieces to rebound, absorb impact, and reduce the impact that may be received by the ceramic.

[0009] For example, in at least one embodiment of this utility model, a tile turning machine for tile production is provided, which further includes: two foamed sponges are provided and are symmetrical to each other along the vertical central axis of the conveying roller. Providing two foamed sponges is beneficial to improving the vibration reduction effect.

[0010] For example, in at least one embodiment of this utility model, a tile turning machine for tile production further includes: the spring telescopic rod is located on the side of the foam sponge and the spring sheet, the spring sheet is set in an arc shape, and the design of the spring telescopic rod is conducive to the automatic reset of the spring sheet when it is not subjected to compression and vibration.

[0011] For example, in at least one embodiment of the present invention, a ceramic tile turning machine for ceramic tile production is provided, which further includes: the robotic arm is located at the top of the conveying roller, and the conveying roller is located on the side of the turning mechanism. This design makes it convenient for the robotic arm to directly clamp the ceramic tile and place it on the conveying roller for conveying.

[0012] According to another aspect, at least one embodiment of the present invention also provides a tile turning machine for tile production, comprising: a rebound damping component provided on the inner wall of the conveying roller, the rebound damping component including a connecting rod, one end of the connecting rod being fixedly connected to the telescopic end of a spring telescopic rod, a deceleration block being fixedly connected to the end of the connecting rod away from the spring telescopic rod, and a blocking block being fixedly connected to the inner wall of the conveying roller. Through the deceleration block and the blocking block, the rebound speed of the spring telescopic rod can be slowed down, preventing the rebound speed from being too fast and causing rebound impact on the conveying roller.

[0013] For example, in a tile turning machine for tile production provided in at least one embodiment of the present invention, the following is also included: the blocking block is located on the displacement trajectory of the deceleration block, and a plurality of the blocking blocks are provided and arranged in a linear array on the inner wall of the conveying roller. The provision of a plurality of blocking blocks is beneficial to improving the efficiency of rebound deceleration.

[0014] For example, in at least one embodiment of the present invention, a tile turning machine for tile production further includes: a limiting rod fixedly connected to the top of the support rod, and the end of the limiting rod away from the support rod passing through the bottom of the connecting rod. The design of the limiting rod is beneficial to restricting the displacement trajectory of the connecting rod and the deceleration block.

[0015] For example, in at least one embodiment of the present invention, a tile turning machine for tile production is provided, which further includes: the side of the deceleration block near the blocking block is set in an arc shape, there are two deceleration blocks, which are symmetrical to each other along the vertical central axis of the conveying roller, and the side of the blocking block is set in an arc shape, which is beneficial to reduce friction during vibration reduction and increase the speed during rebound, thereby reducing the rebound speed.

[0016] The beneficial effects of this utility model are as follows: This invention utilizes the coordinated operation of components such as the conveying roller, spring sheet, and foam sponge within the turning buffer shock absorption assembly. This achieves synergistic buffering with the spring sheet, foam sponge, and spring telescopic rod, effectively absorbing vibrations and impacts during ceramic tile placement. This prevents scratches on the tile glaze or chipping at the edges, ensuring the tile's appearance remains intact after turning. The spring telescopic rod automatically resets the spring sheet, allowing for continuous handling of subsequent vibrations without manual intervention. It is suitable for continuous production line operation, ensuring stable conveying after turning. The buffer assembly is built into the inner wall of the roller, not affecting the normal conveying of ceramic tiles, and specifically addresses vibration issues during turning placement, enhancing the equipment's ability to protect tiles and reducing the defect rate.

[0017] In this invention, the internal components of the spring-loaded damping mechanism, such as the deceleration block, the blocking block, and the connecting rod, work together to achieve contact between the arc surface of the deceleration block and the blocking block during impact. This allows the spring telescopic rod to move downward quickly without obstructing the impact of vibrations from the ceramic tiles, preventing damage and protecting product quality. During reset, the non-arc surface of the deceleration block increases friction, slowing the spring telescopic rod's rebound speed and reducing the impact on the conveyor roller. This reduces wear and tear on equipment components, extends service life, and eliminates the need for additional drive. The structural cooperation between the deceleration block and the blocking block achieves fast shock absorption and slow reset, making it suitable for continuous production line operations, ensuring stable equipment operation, and improving production efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1This is a three-dimensional appearance structure diagram of one embodiment of the present invention; Figure 2 This is a three-dimensional side view structural schematic diagram of the robotic arm in one embodiment of the present invention; Figure 3 This is a three-dimensional enlarged structural diagram of the conveying roller in one embodiment of the present invention; Figure 4 This is a three-dimensional side cross-sectional structural diagram of the foamed sponge in one embodiment of the present invention; Figure 5 This is a three-dimensional side cross-sectional structural diagram of the spring sheet in one embodiment of the present invention.

[0020] In the diagram: 1. Frame; 2. Conveyor line; 3. Robotic arm; 4. Control system; 5. Turning mechanism; 6. Photoelectric sensor; 7. Turning buffer and shock absorption assembly; 71. Conveyor roller; 72. Spring sheet; 73. Foam sponge; 74. Spring telescopic rod; 75. Support rod; 8. Rebound reduction assembly; 81. Connecting rod; 82. Deceleration block; 83. Blocking block; 84. Limiting rod. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0022] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0023] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0026] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] like Figures 1-5 As shown, this invention illustrates a tile turning machine for tile production according to one embodiment of the present invention. It includes a frame 1, a conveyor line 2 on the side of the frame 1, a robotic arm 3 on the top of the frame 1, a turning actuator 5 on the side of the conveyor line 2, a control system 4 on the side of the turning actuator 5, a photoelectric sensor 6 on the side of the turning actuator 5, and a turning buffer and shock absorption assembly 7 on the side of the conveyor line 2. The turning buffer and shock absorption assembly 7 includes a conveyor roller 71, one end of which is located on the side of the conveyor line 2. A spring sheet 72 and a foam sponge 73 are provided on the inner wall of the conveyor roller 71. A support rod 75 is fixedly connected to the inner wall of the conveyor roller 71, and a spring telescopic rod 74 is fixedly connected to the top of the support rod 75. The end of the spring telescopic rod 74 away from the support rod 75 is fixedly connected to the side of the spring sheet 72.

[0028] For example, in at least one embodiment of the present invention, a ceramic tile turning machine for ceramic tile production is provided, which further includes: a plurality of conveying rollers 71 are provided and arranged in a linear array on the side of the conveying line 2, which is beneficial for stable conveying of ceramic tiles.

[0029] For example, in at least one embodiment of the present invention, a tile turning machine for tile production is provided, which further includes: a foamed sponge 73 with grooves on its surface, a plurality of grooves, and two spring pieces 72, which are symmetrical to each other along the vertical central axis of the conveying roller 71. The design of the foamed sponge 73 is conducive to helping the spring pieces 72 to rebound, absorb impact, and reduce the impact that may be received by the ceramic.

[0030] For example, in at least one embodiment of the present invention, a tile turning machine for tile production is provided, which further includes: two foamed sponges 73 are provided and are symmetrical to each other along the vertical central axis of the conveying roller 71. Providing two foamed sponges 73 is beneficial to improving the vibration reduction effect.

[0031] For example, in at least one embodiment of the present invention, a tile turning machine for tile production is provided, which further includes: a spring telescopic rod 74 located on the side of the foam sponge 73 and the spring piece 72, the spring piece 72 being set in an arc shape, and the design of the spring telescopic rod 74 being advantageous so that the spring piece 72 can automatically reset when it is not subjected to compression or vibration.

[0032] For example, in at least one embodiment of the present invention, a ceramic tile turning machine for ceramic tile production is provided, which further includes: a robotic arm 3 located on top of a conveying roller 71, and the conveying roller 71 located on the side of the turning mechanism 5. This design makes it convenient for the robotic arm 3 to directly clamp the ceramic tile and place it on the conveying roller 71 for conveying.

[0033] This embodiment provides a tile turning machine for tile production. Through the cooperation of components such as the conveying roller 71, spring sheet 72, and foam sponge 73 inside the turning buffer shock absorption assembly 7, the spring sheet 72, foam sponge 73, and spring telescopic rod 74 work together to buffer the vibration and impact when the ceramic tile is placed, preventing scratches on the tile glaze or chipping of the edges and corners, and ensuring the tile's appearance is intact after turning. The spring telescopic rod 74 can drive the spring sheet 72 to automatically reset, continuously coping with subsequent vibrations without manual intervention. It is suitable for continuous operation on the production line, ensuring the stability of the conveying process after turning. The buffer assembly is built into the inner wall of the roller, so it does not affect the normal conveying of the ceramic tile, and specifically solves the vibration problem of turning placement, improving the equipment's ability to protect the tiles and reducing the defect rate.

[0034] See in some examples Figures 1-5Conveyor line 2 transports the tiles to the designated position. Photoelectric sensor 6 detects the tile and triggers a signal. Control system 4 receives the signal and instructs robotic arm 3 and the turning mechanism 5 to precisely clamp the tile and rotate it 90 or 180 degrees. After rotation, robotic arm 3 returns the tile to conveyor line 2, which then continues to transport the tile to the next process. Throughout the process, frame 1 provides structural support, and all components, coordinated by control system 4, achieve automated turning, ensuring the tile orientation meets production process requirements. Ceramic sheets are transported on conveyor line 2 via conveyor roller 71. After robotic arm 3 clamps and turns the ceramic sheet, it needs to be placed on conveyor roller 71 for further transport. To prevent vibration when the ceramic sheet is placed on conveyor roller 71, a turning buffer and shock absorption component 7 is installed on the inner wall of conveyor roller 71. When the ceramic sheet is vibrated on conveyor roller 71, the spring 72 and foam sponge 73 inside conveyor roller 71 are impacted, causing the spring 72 to move downwards. When the spring 72 moves downwards, it compresses the telescopic end of the spring telescopic rod 74, causing it to move downwards as well. Utilizing the elasticity of the spring 72 and the high density of the foam 73, the impact on the ceramic tile surface is reduced, preventing vibration after the tile has been turned. When the spring 72 is no longer subjected to pressure or impact, it will stop compressing the spring telescopic rod 74 downwards, and the spring telescopic rod 74 will automatically reset the spring 72. This allows for further vibration damping when the tile is impacted again. The spring 72, foam 73, and spring telescopic rod 74 work together to effectively absorb the vibration and impact during the placement of the ceramic tile, preventing scratches on the glaze or chipping at the edges, ensuring the tile's appearance remains intact after the turn. The spring telescopic rod 74 can automatically reset the spring 72, allowing for continuous handling of subsequent vibrations without manual intervention. This is suitable for continuous operation on production lines, ensuring stable conveying after the turn. The buffer component is built into the inner wall of the roller, not affecting the normal conveying of the ceramic tile, and specifically addresses the vibration problem during the turn, improving the equipment's ability to protect the tile and reducing the defect rate.

[0035] refer to Figures 1-5 In some embodiments, a tile turning machine for tile production further includes a rebound damping component 8 provided on the inner wall of the conveying roller 71. The rebound damping component 8 includes a connecting rod 81, one end of which is fixedly connected to the telescopic end of the spring telescopic rod 74, and a deceleration block 82 is fixedly connected to the end of the connecting rod 81 away from the spring telescopic rod 74. A blocking block 83 is fixedly connected to the inner wall of the conveying roller 71. Through the deceleration block 82 and the blocking block 83, the rebound speed of the spring telescopic rod 74 can be slowed down, preventing the rebound speed from being too fast and causing rebound impact on the conveying roller 71.

[0036] For example, in a tile turning machine for tile production provided in at least one embodiment of the present invention, there is also a blocking block 83 located on the displacement trajectory of the deceleration block 82. Several blocking blocks 83 are provided and are arranged in a linear array on the inner wall of the conveying roller 71. Providing several blocking blocks 83 is beneficial to improving the efficiency of rebound deceleration.

[0037] For example, in at least one embodiment of the present invention, a tile turning machine for tile production is provided, which further includes: a limiting rod 84 fixedly connected to the top of the support rod 75, and the end of the limiting rod 84 away from the support rod 75 passing through the bottom of the connecting rod 81. The design of the limiting rod 84 is beneficial to restricting the displacement trajectory of the connecting rod 81 and the deceleration block 82.

[0038] For example, in at least one embodiment of the present invention, a tile turning machine for tile production is provided, which further includes: the side of the deceleration block 82 near the blocking block 83 is set in an arc shape, there are two deceleration blocks 82, and they are symmetrical to each other along the vertical central axis of the conveying roller 71. The side of the blocking block 83 is set in an arc shape, which is beneficial to reduce friction during vibration reduction and increase the speed during rebound, thereby reducing the rebound speed.

[0039] In this embodiment, the components such as the deceleration block 82, the blocking block 83, and the connecting rod 81 inside the rebound damping component 8 cooperate with each other to achieve contact between the arc surface of the deceleration block 82 and the blocking block 83 during impact. This does not hinder the rapid downward movement of the spring telescopic rod 74, and can absorb the vibration impact of the ceramic tile placement in time, avoiding damage to the ceramic tile due to impact and protecting product quality. During reset, the non-arc surface of the deceleration block 82 increases the friction force, slows down the rebound speed of the spring telescopic rod 74, reduces the impact of the rebound on the conveyor roller 71, reduces the wear of equipment components, and extends service life. No additional drive is required. The structural cooperation between the deceleration block 82 and the blocking block 83 achieves fast shock absorption and slow reset, which is suitable for continuous operation of the production line, ensures stable operation of the equipment, and improves production efficiency.

[0040] In this embodiment, when the spring piece 72 is impacted, it compresses the telescopic end of the spring telescopic rod 74 and moves downward, which in turn drives the connecting rod 81 and the deceleration block 82 to move downward. The side of the deceleration block 82 near the blocking block 83 is set in an arc shape. When the deceleration block 82 moves downward and contacts the blocking block 83, it moves downward at a relatively fast speed, allowing the spring telescopic rod 74 to move downward quickly with the spring piece 72 and absorb the impact in time. When the spring piece 72 is no longer impacted, it automatically returns to its original position as the telescopic end of the spring telescopic rod 74 returns to its original position, which drives the connecting rod 81 and the deceleration block 82 to move upward and return to its original position. When the deceleration block 82 moves upward with the connecting rod 81, the side of the deceleration block 82 that contacts the blocking block 83 is the non-arc surface. The non-arc surface moves in conjunction with the blocking block 83. When in contact, the friction increases, slowing down the upward movement of the deceleration block 82. This reduces the impact of the spring telescopic rod 74 rebounding onto the conveyor roller 71 when it is not impacted. During impact, the arc surface of the deceleration block 82 contacts the blocking block 83, not hindering the rapid downward movement of the spring telescopic rod 74. This allows for timely absorption of the vibration impact from the placement of ceramic tiles, preventing damage to the tiles and protecting product quality. During reset, the non-arc surface of the deceleration block 82 increases the friction, slowing down the rebound speed of the spring telescopic rod 74 and reducing the impact on the conveyor roller 71. This reduces wear and tear on equipment components and extends service life. No additional drive is required. The structure of the deceleration block 82 and the blocking block 83 works together to achieve fast shock absorption and slow reset, making it suitable for continuous operation on assembly lines, ensuring stable equipment operation, and improving production efficiency.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tile turning machine for tile production, characterized in that, Includes a frame (1), a conveyor line (2) is provided on the side of the frame (1), a robotic arm (3) is provided on the top of the frame (1), a turning actuator (5) is provided on the side of the conveyor line (2), a control system (4) is provided on the side of the turning actuator (5), a photoelectric sensor (6) is provided on the side of the turning actuator (5), and a turning buffer and shock absorption assembly (7) is provided on the side of the conveyor line (2). The turning buffer shock absorption assembly (7) includes a conveyor roller (71), one end of which is located on the side of the conveyor line (2). A spring sheet (72) is provided on the inner wall of the conveyor roller (71), and a foam sponge (73) is provided on the inner wall of the conveyor roller (71). A support rod (75) is fixedly connected to the inner wall of the conveyor roller (71), and a spring telescopic rod (74) is fixedly connected to the top of the support rod (75). The end of the spring telescopic rod (74) away from the support rod (75) is fixedly connected to the side of the spring sheet (72).

2. A tile turning machine for tile production according to claim 1, characterized in that, Several conveying rollers (71) are provided and are arranged in a linear array on the side of the conveying line (2).

3. A tile turning machine for tile production according to claim 2, characterized in that, The surface of the foamed sponge (73) is provided with grooves, and there are several grooves. There are two spring pieces (72), which are symmetrical to each other along the vertical central axis of the conveying roller (71).

4. A tile turning machine for tile production according to claim 3, characterized in that, Two foamed sponges (73) are provided and are symmetrical to each other along the vertical central axis of the conveying roller (71).

5. A tile turning machine for tile production according to claim 4, characterized in that, The spring telescopic rod (74) is located on the side of the foam sponge (73) and the spring piece (72), which is set in an arc shape.

6. A tile turning machine for tile production according to claim 5, characterized in that, The robotic arm (3) is located on top of the conveying roller (71), which is located on the side of the turning actuator (5).

7. A tile turning machine for tile production according to claim 6, characterized in that, The inner wall of the conveying roller (71) is provided with a rebound damping component (8), which includes a connecting rod (81). One end of the connecting rod (81) is fixedly connected to the telescopic end of the spring telescopic rod (74). The end of the connecting rod (81) away from the spring telescopic rod (74) is fixedly connected to a deceleration block (82). A blocking block (83) is fixedly connected to the inner wall of the conveying roller (71).

8. A tile turning machine for tile production according to claim 7, characterized in that, The blocking block (83) is located on the displacement trajectory of the deceleration block (82). Several blocking blocks (83) are provided and are arranged in a linear array on the inner wall of the conveying roller (71).

9. A tile turning machine for tile production according to claim 8, characterized in that, A limiting rod (84) is fixedly connected to the top of the support rod (75), and the end of the limiting rod (84) away from the support rod (75) passes through the bottom of the connecting rod (81).

10. A tile turning machine for tile production according to claim 9, characterized in that, The deceleration block (82) is arc-shaped on the side near the blocking block (83). There are two deceleration blocks (82), which are symmetrical to each other along the vertical central axis of the conveying roller (71).

Images