Bottle body conveying device
By setting a track composed of guide vanes and baffles on the conveying device and adjusting the protrusion of the guide vanes, the problem of bottles rolling off due to dense accumulation of bottles is solved, and the orderly conveying and efficient transmission of bottles are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-04-14
AI Technical Summary
In the cosmetics industry, bottles that are densely packed on a conveyor belt are prone to rolling off from both sides, affecting the normal operation of the production line and increasing production costs.
A conveying track is formed by a guide vane, a first baffle, and a second baffle. The protrusion of the guide vane is adjusted by an adjustment device to ensure that only one bottle passes through at a time. Combined with the guiding effect of the conveying device, this prevents bottles from stacking or falling.
This effectively prevents bottles from stacking and falling during transport, improves transport efficiency, reduces the possibility of blockages and accumulation, and ensures that bottles enter the next process in an orderly manner.
Smart Images
Figure CN224118102U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cosmetic material conveying technology, and in particular to a bottle conveying device. Background Technology
[0002] Conveyor belts, also known as transport belts or transmission belts, are widely used in various industries such as home appliances, electronics, electrical appliances, machinery, tobacco, injection molding, postal services, printing, and food, primarily for material transport. Conveyor belts can transport various bulk materials as well as individual items such as cartons and bags with relatively low weight. Furthermore, conveyor belts offer continuous, high-efficiency, and large-angle transport capabilities, are safe to operate, easy to use and maintain, have low transportation costs, and can shorten transport distances, reduce project costs, and save manpower and resources.
[0003] In the current cosmetics industry, it is often necessary to transport a large number of bottles at the same time. If a large number of bottles are transported at a certain point on the conveyor belt, the dense accumulation of a large number of bottles can easily cause the bottles to roll off the sides of the conveyor belt during the transport process, thereby affecting the normal operation of the production line and ultimately increasing production costs.
[0004] Therefore, how to avoid the phenomenon of bottles falling due to the dense accumulation of a large number of bottles during the conveying process has become an urgent problem to be solved by those skilled in the art. Summary of the Invention
[0005] In view of this, this application proposes a bottle conveying device, including: a mounting frame, a conveying device, a guide vane, an adjusting device, a first baffle and a second baffle;
[0006] The conveying device is mounted on the mounting frame and is suitable for transporting bottles.
[0007] The first baffle and the second baffle are arranged opposite each other on both sides of the conveying device; the length direction of the first baffle and the length direction of the second baffle are parallel to each other and extend along the conveying direction of the conveying device.
[0008] One end of the first baffle is provided with an inclined baffle, and a preset angle is provided between the length direction of the first baffle and the length direction of the inclined baffle.
[0009] A guide vane is provided on the side of the inclined baffle facing the second baffle; one end of the adjusting device passes through the first baffle and abuts against one side of the guide vane, which is suitable for adjusting the protrusion of the guide vane.
[0010] In one possible implementation, the preset angle range is: 165°≦β≦180°.
[0011] In one possible implementation, the adjusting device is a bolt; a threaded hole matching the bolt is provided on the first baffle, and the bolt passes through the threaded hole and is threadedly connected to the ground baffle.
[0012] In one possible implementation, it also includes two or more fixed supports, which are respectively installed on both sides of the mounting frame, and the first baffle and the second baffle are respectively connected to the mounting frame through two or more fixed supports.
[0013] In one possible implementation, the fixed support includes a load-bearing rod and a fixing rod; the load-bearing rod is mounted on a mounting frame, and one end of the fixing rod passes through the load-bearing rod and is connected to the first baffle.
[0014] In one possible implementation, the fixing rod can move along its length to adjust the distance between the first baffle and the second baffle.
[0015] In one possible implementation, there are ten fixed supports.
[0016] In one possible implementation, the conveying device includes a conveyor belt, a driving roller, a driven roller, and a drive motor;
[0017] The driving roller and the driven roller are respectively set at both ends of the mounting frame; the conveyor belt is closed, with one end of the conveyor belt sleeved on the driving roller and the other end of the conveyor belt sleeved on the driven roller; the output end of the drive motor is connected to the driving roller, and the drive motor is suitable for driving the driving roller to rotate.
[0018] Beneficial effects of this application
[0019] This application utilizes a guide vane, a first baffle, a second baffle, and a conveying device to form a conveying track. The first and second baffles confine the bottle to the conveying device, preventing it from falling off during transport. An adjusting device can adjust the protrusion of the guide vane, thereby adjusting the distance between the guide vane and the second baffle according to the diameter of a single bottle, ensuring that only one bottle can pass between the guide vane and the second baffle at a time. When the conveying device moves the bottle on it, it is guided by the guide vane, causing the bottle to move along a preset trajectory. When the bottle reaches... When the bottles reach the end of the guide vane, the distance between the guide vane and the second baffle can only support one bottle to pass through smoothly. Therefore, under the guidance, standardization, and limiting effect of the guide vane, all bottles pass through the space between the guide vane and the second baffle in sequence. Finally, the multiple bottles that are piled up together are straightened into a row and transported after passing through the guide vane. This makes it easier for multiple bottles to enter the next process through the conveying device. It avoids the phenomenon of bottles stacking and tipping over during the conveying process. It also reduces the possibility of bottles getting blocked and piled up when entering the conveying device, thus improving the transmission efficiency.
[0020] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0021] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.
[0022] Figure 1 This diagram shows the main structure of the bottle conveying device of this application;
[0023] Figure 2 This diagram shows the structure of the bottle body as it passes the guide vane.
[0024] Figure 3 Show Figure 1 A magnified view of a portion of the image;
[0025] Figure 4 A top view of the bottle conveying device of this application is shown. Detailed Implementation
[0026] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.
[0027] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or 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.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.
[0031] This application proposes a bottle conveying device, such as... Figures 1 to 4 As shown, the device includes: a mounting frame 100, a conveying device 200, a guide vane 330, an adjusting device, a first baffle 310, and a second baffle 320. The conveying device 200 is mounted on the mounting frame 100 and is suitable for conveying bottles 500. The first baffle 310 and the second baffle 320 are arranged opposite each other on both sides of the conveying device 200. The length directions of the first baffle 310 and the second baffle 320 are parallel to each other and extend along the conveying direction of the conveying device 200. One end of the first baffle 310 is provided with an inclined baffle 311. A first preset angle β is provided between the length directions of the first baffle 310 and the length directions of the inclined baffle 311. The side of the inclined baffle 311 facing the second baffle 320 is provided with a guide vane 330. One end of the adjusting device passes through the first baffle 310 and abuts against one side of the guide vane 330, and is suitable for adjusting the protrusion degree of the guide vane 330.
[0032] It should be noted that the mounting frame 100 is used to provide a complete mounting base for the conveying device 200. The conveying device 200 is mounted on the mounting frame 100 and is used to transport bottles 500. The first baffle 310 and the second baffle 320 are arranged opposite each other on both sides of the conveying device 200. The first baffle 310 and the second baffle 320 can limit the movement of the bottles 500 and prevent them from rolling off the sides of the conveying device 200 during transport. The inclined baffle 311 is fixedly connected to the feed end of the first baffle 310. Furthermore, the inclined baffle 311 is located at the feed end of the first baffle 310, one end of the guide vane 330 is connected to the inclined baffle 311, and the other end of the guide vane 330 extends towards the second baffle 320; the guide vane 330 is suitable for guiding the bottle 500 to flow along a predetermined path and direction. After being guided by the guide vane 330, the bottle 500 is distributed sequentially on the conveying device 200, avoiding the bottle 500 from being scattered or accumulating in large quantities on the conveying device 200, ensuring that the conveying device 200 can transport the bottle 500 in an orderly and efficient manner. Figure 4 As shown, one end of the inclined baffle 311 is fixedly connected to the first baffle 310, and the other end of the inclined baffle 311 is suitable for connection with the previous process. By setting the inclined baffle, more bottles 500 can enter the conveying device 200, thus improving the conveying efficiency of the bottles 500. Figure 4As shown, by setting a preset angle β, the bottle 500 can enter the conveying device 200 faster without causing the bottle 500 to block the conveying device 200.
[0033] The adjusting device penetrates the first baffle 310 and abuts against the surface of the guide vane 330 facing the first baffle 310. It is used to adjust the protrusion of the guide vane (i.e., adjust the distance between the end of the guide vane 330 away from the inclined baffle and the second baffle), thereby accommodating bottles 500 of different sizes and ensuring that only one bottle can pass between the guide vane 330 and the second baffle 320. After multiple bottles 500 pass smoothly through the guide vane 330, they are arranged in sequence and pass through the conveying device 200 to enter the next process. Specifically, the abutment between the adjusting device and the guide vane 330 means that the end of the adjusting device after penetrating the first baffle 310 contacts the guide vane 330, thereby enabling the adjusting device to push the guide vane 330 to move.
[0034] This application utilizes a guide vane 330, which, along with a first baffle 310, a second baffle 320, and a conveying device 200, forms a conveying track. The first baffle 310 and the second baffle 320 confine the bottle 500 to the conveying device 200, preventing the bottle 500 from falling off either side of the conveying device 200 during transport. An adjusting device can adjust the protrusion of the guide vane 330, thereby adjusting the distance between the guide vane 330 and the second baffle 320 according to the diameter of a single bottle 500. This ensures that only one bottle 500 can pass between the guide vane 330 and the second baffle 320 at a time. When the conveying device 200 moves the bottle 500 on it, it is guided by the guide vane 330, causing the bottle 500 to follow a preset trajectory. As the bottle 500 moves, when it reaches the end of the guide plate 330, the distance between the guide plate 330 and the second baffle 320 only allows one bottle 500 to pass smoothly. Therefore, under the regulating, guiding, and limiting effect of the guide plate 330, all bottles 500 pass between the guide plate 330 and the second baffle 320 in sequence. Finally, the multiple bottles 500 that are piled up are arranged into a row after passing through the guide plate 330 and conveyed. This makes it easier for multiple bottles 500 to enter the next process through the conveying device 200. This avoids the phenomenon of bottles 500 stacking and tipping over during the conveying process. It also reduces the possibility of bottles 500 getting blocked and piled up when entering the conveying device 200, and improves the transmission efficiency.
[0035] In one possible implementation, the preset angle β has a value range of 165°≦β≦180°; preferably, the preset angle β has a value of 165°.
[0036] Furthermore, such as Figure 3As shown, it also includes two fixing parts 331. Both fixing parts 331 pass through the guide plate 330 and are fixedly connected to the inclined baffle 311. The two fixing parts 331 are arranged opposite to each other along the width direction of the guide plate 330. By setting the fixing parts 331, the guide plate 330 is ensured to maintain a relatively fixed position during the transmission of the bottle 500, ensuring that the guide plate 330 can perform its guiding function normally, and thus ensuring that the bottle 500 can move along a predetermined path and direction when it is transmitted on the conveying device 200.
[0037] Preferably, the fixing part 331 is a rivet or a set screw.
[0038] In one possible implementation, the main body of the guide vane 330 is a rectangular sheet structure. It should be noted that the rectangular sheet structure can more gently change the direction of movement of the bottle 500, reducing the impact on the bottle 500 during the flow guiding process and lowering the risk of damage to the bottle 500. At the same time, the guide vane 330 provides a clear movement trajectory for the bottle 500, ensuring that the bottle 500 can move accurately along the predetermined route, thereby allowing the bottles to pass smoothly through the conveyor 200 in sequence.
[0039] Furthermore, the guide vane 330 has elastic deformation capability, such as... Figure 1 , Figure 2 As shown, when the bottle 500 contacts the guide vane 330, the guide vane 330, due to its elasticity, can act as a buffer, reducing damage to the bottle 500 caused by collisions during transportation. Simultaneously, during the manufacturing process, due to different production batches, the diameter of different batches of bottles 500 has a certain error. Because the guide vane 330 has elastic deformation capability, it will press against the guide vane 330 and deform when the bottle 500 passes its end. After the bottle 500 passes the guide vane 330, the bottle... When bottle 500 moves with conveyor 200 and comes into contact with guide plate 330, guide plate 330 uses its elastic deformation capability to buffer bottle 500 and guide bottle 500 to smoothly change its direction of movement along the inclined surface of guide plate 330, gradually moving towards the side of second baffle 320. Since the shortest distance between guide plate 330 and second baffle 320 is equal to the maximum diameter of bottle 500, bottle 500 is conveyed to the next process one by one under the flexible guidance of guide plate 300, thus improving the transmission efficiency.
[0040] Preferably, the guide vane 330 can be made of plastic, resin or metal.
[0041] In one possible implementation, the first baffle 310, the second baffle 320, and the inclined baffle 311 are all rectangular plate structures.
[0042] In one possible implementation, the adjusting device is a bolt 340, and the first baffle 310 has a threaded hole that matches the bolt 340. The bolt 340 is threadedly connected to the first baffle 310 through the threaded hole.
[0043] It should be noted here that, as Figures 1 to 3 As shown, the first baffle 310 has a threaded hole, which is a through hole. The bolt 340 is threadedly connected to the first baffle 310 through the threaded hole, and the bolt 340 can be screwed in and out of the threaded hole. After the bolt 340 passes through the first baffle 310 through the threaded hole, it contacts the side of the guide vane 330 facing the first baffle 310. By screwing the bolt 340 in and out of the threaded hole, the protrusion degree of the guide vane 330 can be adjusted to ensure that the guide vane 330 and the second baffle 320 maintain an appropriate distance. When the size of the bottle 500 to be conveyed changes, the protrusion degree of the guide vane 330 can be adjusted by the bolt 340 so that the shortest distance between the guide vane 330 and the second baffle 320 is equal to the maximum diameter of the bottle 500 after the size change. The bolt 340 makes it easier to adjust the guide vane 330, thereby adapting to the conveying of bottles 500 of different sizes and improving the adaptability of the bottle 500 conveying device 200.
[0044] Specifically, when it is necessary to increase the protrusion of the guide vane 330, the bolt 340 is rotated clockwise so that it is unscrewed from the threaded hole. The end of the bolt 340 protrudes from the first baffle 310 and contacts the guide vane 330. At this time, the bolt 340 will generate a thrust on the guide vane 330 away from the first baffle 310. Under the action of this thrust, the guide vane 330 moves in an arc around the connection point with the inclined baffle 311 in a direction away from the first baffle 310. At the same time, since the bolt 340 is in contact with the guide vane 330, the contact point formed between the bolt 340 and the guide vane 330 moves along the end of the guide vane 330 away from the inclined baffle 311, thus ultimately increasing the protrusion of the guide vane 330. Conversely, when it is necessary to reduce the protrusion of the guide vane 330, the bolt 340 is rotated counterclockwise so that the bolt 340 is screwed into the threaded hole of the first baffle 310. At this time, the thrust of the bolt 340 on the guide vane 330 is reduced. Under the action of its own elastic restoring force, the guide vane 330 moves in an arc around the connection point with the inclined baffle 311 toward the direction closer to the first baffle 310. At the same time, the contact point formed between the bolt 340 and the guide vane 330 moves along the end of the guide vane 330 closer to the inclined baffle 311, thereby reducing the protrusion of the guide vane 330.
[0045] In one possible implementation, such as Figure 2 , Figure 4As shown, it also includes two or more fixed supports 400, which are respectively installed on both sides of the mounting frame 100. The first baffle 310 and the second baffle 320 are respectively connected to the mounting frame 100 through two or more fixed supports 400. It should be noted that the fixed supports 400 are used to provide stable support for the first baffle 310 and the second baffle 320, thereby ensuring that the first baffle 310 and the second baffle 320 maintain a relatively stable position during the transfer of the bottle body 500. Two or more fixed supports 400 are respectively installed on both sides of the mounting frame 100, and the two or more fixed supports 400 are arranged sequentially along the conveying direction of the conveying device 200. Multiple fixed supports 400 can effectively distribute and bear the weight of the first baffle 310 and the second baffle. The number and position of the fixed supports 400 can be adjusted according to actual needs to flexibly adapt to the first baffle 310 and the second baffle 320 of different lengths and widths.
[0046] In one possible implementation, the fixed support 400 includes a support rod 410 and a fixing rod 420; the support rod 410 is mounted on the mounting bracket 100, and one end of the fixing rod 420 passes through the support rod 410 and is connected to the first baffle 310.
[0047] It should be noted here that, as Figure 1 , Figure 4 As shown, a slide groove 110 is provided along the length of the mounting frame 100, and the slide groove 110 is located on both sides of the conveying device 200. One end of the bearing rod 410 extends into the slide groove 110 and is slidably connected to the slide groove 110. The distance between multiple bearing rods 410 can be adjusted by adjusting the position of the bearing rod 410 in the slide groove 110. A through hole is provided on the side wall of the bearing rod 410, and a fixing rod 420 is connected to the bearing rod 410 through the through hole. The length direction of the fixing rod 420 is perpendicular to the length direction of the bearing rod 410. A slot 312 is provided on the side of the first baffle 310 away from the guide plate 330. One end of the fixing rod 420 passes through the through hole of the bearing rod 410 and is inserted into the slot 312. By providing the slot 312 on the first baffle 310, the fixing rod 420 and the first baffle 310 are detachably connected. The bearing rod 410 and the fixing rod 420 cooperate with each other to provide a stable support structure for the first baffle 310. The mounting frame 100 transmits the supporting force to the fixing rod 420 through the bearing rod 410, and then to the first baffle 310 through the fixing rod 420, thus preventing the first baffle 310 from shaking or shifting during operation, thereby ensuring the stability of the bottle 500 conveying process.
[0048] In one possible implementation, the fixing rod 420 is movable along its length to adjust the distance between the first baffle 310 and the second baffle 320. It should be noted that the fixing rod 420 is movably connected to the supporting rod 410, and the outer contour of the fixing rod 420 matches the through hole on the supporting rod 410. The fixing rod 420 is inserted into the through hole of the supporting rod 410 and can move along its length within the through hole. Through the insertion and removal of the fixing rod 420 in the through hole of the supporting rod 410, the distance between the first baffle 310 and the second baffle 320 can be easily adjusted, thereby adapting to the conveying needs of different bottle bodies 500.
[0049] Furthermore, such as Figure 1 As shown, it also includes a locking member 430. The top end of the support rod 410 is provided with a locking hole, which is connected to the through hole. The locking member 430 is set on the top of the support rod 410 through the locking hole and can be screwed in and out of the locking hole of the support rod 410. The locking member 430 is suitable for locking the fixed rod 420. When the fixed rod 420 is in the required position, by tightening the locking member 430, the locking member 430 presses the fixed rod 420, thereby fixing the fixed rod 420 on the support rod 410, ensuring the stability of the fixed rod 420 on the support rod 410, thereby preventing the first baffle 310 from shifting during use.
[0050] Furthermore, the second baffle 320 is connected to the mounting bracket 100 via the fixed support 400 in the same way as the first baffle 310, as described in detail above, and will not be repeated here.
[0051] In one possible implementation, such as Figure 2 , Figure 4 As shown, there are a total of 10 fixing seats, five of which are located on one side of the first baffle 310 and the other five are located on one side of the second baffle 320. The distance between each pair of adjacent fixing seats 400 is the same. The equidistantly distributed fixing seats provide uniform support for the first baffle 310 and the second baffle 320, avoiding the sagging or twisting of the first baffle 310 and the second baffle 320 due to uneven support, and ensuring that the positions of the first baffle 310 and the second baffle 320 are more stable.
[0052] In one possible implementation, the conveying device 200 includes a conveyor belt 210, a drive roller 230, a driven roller 220, and a drive motor. The drive roller 230 and the driven roller 220 are respectively disposed at both ends of the mounting frame 100. The conveyor belt 210 is closed, with one end of the conveyor belt 210 sleeved on the drive roller 230 and the other end of the conveyor belt 210 sleeved on the driven roller 220. The conveyor belt 210 is meshed with the drive roller 230 and the driven roller 220. The output end of the drive motor is connected to the central shaft of the drive roller 230 for transmission. The drive motor is suitable for driving the drive roller 230 to rotate, thereby driving the conveyor belt 210 to move. By setting up the conveying device 200, the conveying device 200 can smoothly and quickly convey the bottle 500, reducing the workload of the workers and improving work efficiency.
[0053] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A bottle conveying device, characterized in that, include: Mounting frame, conveying device, guide vanes, adjusting device, first baffle and second baffle; The conveying device is mounted on the mounting frame and is suitable for conveying bottles. The first baffle and the second baffle are disposed opposite to each other on both sides of the conveying device; the length direction of the first baffle and the length direction of the second baffle are parallel to each other and extend along the conveying direction of the conveying device; One end of the first baffle is provided with an inclined baffle, and a preset angle is provided between the length direction of the first baffle and the length direction of the inclined baffle. The guide vane is provided on the side of the inclined baffle facing the second baffle; one end of the adjustment device passes through the first baffle and abuts against one side of the guide vane, and is suitable for adjusting the protrusion degree of the guide vane; The adjusting device is a bolt; The first baffle has a threaded hole that matches the bolt, and the threaded hole is a through hole, through which the bolt is threadedly connected to the first baffle; The protrusion of the guide vane is adjusted by the bolt so that the shortest distance between the guide vane and the second baffle is equal to the maximum diameter of the bottle body after the size change.
2. The bottle conveying device according to claim 1, characterized in that, The preset angle has a range of values: 165°≦β≦180°.
3. The bottle conveying device according to claim 1, characterized in that, It also includes two or more fixed supports. Two or more fixed supports are respectively installed on both sides of the mounting frame, and the first baffle and the second baffle are respectively connected to the mounting frame through two or more fixed supports.
4. The bottle conveying device according to claim 3, characterized in that, The fixed support includes a load-bearing rod and a fixing rod; The support rod is mounted on the mounting bracket, and one end of the fixing rod passes through the support rod and is connected to the first baffle.
5. The bottle conveying device according to claim 4, characterized in that, The fixing rod can move along its length to adjust the distance between the first baffle and the second baffle.
6. The bottle conveying device according to claim 5, characterized in that, There are ten fixed supports.
7. The bottle conveying device according to claim 1, characterized in that, The conveying device includes a conveyor belt, a drive roller, a driven roller, and a drive motor; The driving roller and the driven roller are respectively disposed at both ends of the mounting frame; The conveyor belt is arranged in a closed configuration, with one end of the conveyor belt sleeved on the drive roller and the other end of the conveyor belt sleeved on the driven roller; The output end of the drive motor is connected to the active roller, and the drive motor is suitable for driving the active roller to rotate.