Paper core tube automatic push device
By designing an automatic push device that uses the cylinder indirectly to promote the paper core barrel, it solves the problem of high cost, large volume, and complicated control in existing technology, and realizes the effective push and deformation prevention of paper cork. The structure is compact and controlled. Simple.
Patent Information
- Application Number
- CN202411622409.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2044-11-14
AI Technical Summary
The existing automatic pushing device of the paper core barrel cannot effectively use the cylinder to directly push the paper core barrel, resulting in high cost, large volume, complex control, and is not suitable for paper core barrels of different lengths.
Design a type of paper core barrel automatic pushing device that uses the cylinder to indirectly push the paper core, transmits a secondary transmission and chain transmission of the wire rope, transforms the thrust of the cylinder into the forward thrust of the paper crystap, and controls it through the limit block control push push through the limit block control block. The movement distance of the board.
The normal control of the push and the last push process of the paper core barrel is achieved, and the deformation and warning of the paper core barrel are avoided, and the push itinerary does not require in advance. The structure is compact, low in cost, and simple control.
Smart Images
Figure CN119117755B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of film processing equipment, and in particular relates to an automatic paper core tube pushing device. Background Art
[0002] A wide film roll can be cut into several narrow film rolls by a slitting machine. During the slitting process, the wide film roll is gradually unwound and cut by a cutter. Each film after slitting needs to be rewound into a narrow film roll using a corresponding paper core tube. When rewinding, each paper core tube is arranged on the rewinding shaft and close together. The multiple paper core tubes arranged on the rewinding shaft at the same time are called a group of paper core tubes.
[0003] In order to put multiple paper core tubes in a group onto the reel at the same time, each paper core tube must be closely arranged in the longitudinal direction (longitudinal direction refers to the axial direction of the paper core tube) and placed in the long V-shaped groove cavity. For this purpose, an automatic paper core tube pushing device is required. The automatic paper core tube pushing device includes a fixed support, a push plate, a slider, and a longitudinal guide rail. The push plate is used to abut against one side end surface of the paper core tube. The longitudinal projection position of the push plate is aligned with the groove cavity of the V-shaped groove. A stopper is provided at the front end of the groove cavity of the V-shaped groove to block the paper core tube. The push plate is fixedly connected to the slider, and a slider driving mechanism is also provided to drive the slider to move along the longitudinal guide rail. Figure 1 As shown, during use, the paper core tubes 8 are stored on the core storage rack 9, and the paper core tubes 8 are lowered one by one by using the transport mechanism 91, as shown in FIG. Figure 1 As shown by the vertical arrow in the middle, the paper core tubes 8 are successively lowered into the groove cavity of the V-shaped groove 7. At this time, the longitudinal position of the paper core tube 8 in the V-shaped groove cavity is called the initial position; each time a paper core tube 8 reaches the initial position, the push plate 71 pushes the paper core tube 8 forward for a distance, such as Figure 1 As shown by the horizontal arrow in the middle, this process is repeated many times until the front end of the frontmost paper core tube 8 contacts the stopper 72, so that each paper core tube 8 is closely arranged in the longitudinal direction and placed in the groove cavity of the long V-shaped groove 7, forming a group of paper core tubes that can be simultaneously sleeved on the winding shaft. After that, the relative movement of the winding shaft and the V-shaped groove 7 can be used to make the group of paper core tubes 8 simultaneously sleeved on the winding shaft and leave the V-shaped groove 7.
[0004] In this application document, the initial position refers to the position of the paper core tube when it is just transferred from the transport mechanism to the groove cavity of the V-shaped groove. The initial position depends on the longitudinal position of the core storage rack and the transport mechanism. Each group of paper core tubes needs to have multiple pushing processes. Except for the last push, the rest of the pushing processes are called normal pushing processes. The paper core tube that the push plate contacts during the last pushing process is called the last paper core tube.
[0005] The slider driving mechanism of the existing paper core tube automatic pushing device can only use an electric cylinder with a large stroke and a servo motor as a power mechanism, but is not suitable for using a cylinder to directly push the paper core tube. This is mainly due to the following two reasons:
[0006] On the one hand, the positions of the core storage rack and the transport mechanism are fixed, the initial position of the paper core tube is determined, and the stroke length of the cylinder piston rod each time is also fixed, but the width of the film slitting (equivalent to the length specification of the paper core tube) has multiple possibilities, that is, the length specification of the paper core tube is uncertain. Therefore, if the paper core tube is pushed directly by the cylinder, the distance from the initial position to the final position of the paper core tube is generally not exactly an integer multiple of the stroke of the cylinder piston rod. Furthermore, in each group of paper core tubes, the stroke required for the last push (the stroke required to push the last paper core tube) is generally not exactly equal to the stroke of the cylinder piston rod. This means that in the last push process, when the cylinder piston rod has not yet fully extended, the last paper core tube will be blocked by the paper core tube in front and cannot continue to move forward; and when the last paper core tube is blocked by the paper core tube in front When the paper core tube is blocked and cannot move forward, the cylinder piston rod still maintains the forward thrust on the paper core tube, and the paper core tube is not as hard as the metal tube and has poor deformation resistance. It is easy to deform, warp and arch under the thrust of the cylinder. Therefore, it is not suitable to use the cylinder to directly push the paper core tube; secondly, after each push, the V-groove cavity needs to make enough space to receive another paper core tube transferred by the conveying mechanism. Therefore, if the paper core tube is directly pushed by the cylinder, the stroke of the cylinder piston rod is required to be not less than the length of the paper core tube, so that the moving distance of the paper core tube after each push is not less than the length of the paper core tube; but if the width of the film after slitting specified by the customer is larger, the length of the paper core tube is longer, which may reach more than one meter, which exceeds the stroke of the piston rod of most ordinary cylinders. In this case, it is not suitable to use ordinary cylinders as the power mechanism to directly push the paper core tube.
[0007] Due to the above reasons, the existing automatic paper core tube pushing device generally adopts an electric cylinder with a large stroke and equipped with a servo motor as the power mechanism, but this is costly, bulky, and complex to control. It is necessary to calculate the moving distance of the paper core tube in the last pushing process according to the length of the paper core tube and input the data into the operation control system, which is not only troublesome, but also may cause problems in the pushing process due to calculation errors or input errors. Summary of the invention
[0008] The purpose of the present invention is to overcome the above-mentioned disadvantages and provide an automatic paper core tube pushing device, which can use a cylinder to indirectly push the paper core tube to arrange it longitudinally without squeezing the paper core tube to cause its deformation. In addition, the maximum pushing distance of the cylinder can reach twice the stroke of the cylinder piston rod.
[0009] The purpose can be achieved according to the following scheme: an automatic paper core tube pushing device, comprising a fixed support, a slider, a first guide rail, a push plate for abutting against the end surface of the paper core tube, and a V-shaped groove for storing the paper core tube, the first guide rail extends in the longitudinal direction, the longitudinal projection position of the push plate is aligned with the groove cavity of the V-shaped groove, and the push plate is fixedly connected to the slider; a stopper for blocking the paper core tube is provided at the front end of the groove cavity of the V-shaped groove; a slider driving mechanism for driving the slider to move longitudinally along the first guide rail is also provided, characterized in that: the slider driving mechanism includes a cylinder, a sliding seat, a second guide rail, The wire rope transmission pair and the chain transmission pair, the second guide rail is parallel to the first guide rail, the sliding seat is installed on the second guide rail, and the piston rod of the cylinder drives the sliding seat; the chain transmission pair includes two front and rear sprockets and a chain surrounding the two sprockets, and the slider is fixedly connected to the chain links of the chain; the wire rope transmission pair includes a wire rope, two front and rear guide wheels, and three front, middle and rear tensioning wheels. The wire rope passes around the two guide wheels and the three tensioning wheels. The rotating shafts of the three tensioning wheels are fixedly installed on the fixed support, and the vertical position of the tensioning wheel in the middle is staggered with the vertical positions of the other two tensioning wheels;
[0010] The rotating shafts of the front and rear guide wheels are installed on the sliding seat and move longitudinally with the sliding seat. The rotating shafts of the front and rear sprocket wheels are also installed on the sliding seat and move longitudinally with the sliding seat. The guide wheel on the front side is coaxially fixedly connected with the sprocket on the front side and rotates synchronously. The guide wheel on the rear side is coaxially fixedly connected with the sprocket on the rear side and rotates synchronously. The sum of the rotational friction forces generated during the rotation of the three tensioning wheels is greater than the sum of the rotational friction forces generated during the rotation of the two guide wheels and the two sprocket wheels.
[0011] The total rotational friction force generated during the rotation of the three tension wheels is greater than the friction resistance generated by the V-shaped groove on all paper core tubes in the V-shaped groove cavity during the last pushing process.
[0012] A limit block for limiting the backward movement of the slider is also provided on the sliding seat, and the limit block is located behind the slider.
[0013] The tensioning wheels at the front and rear sides are fixed in position, and the tensioning wheel in the middle is vertically adjustable.
[0014] The present invention has the following advantages and effects:
[0015] 1. During the normal pushing process, the total rotational friction between the three tension wheels and the rotating shaft is greater than the friction resistance encountered by the paper core tube during the pushing process. Therefore, the three tension wheels will not rotate, and the steel wire ropes between the three tension wheels are stationary relative to the three tension wheels. The thrust of the paper core tube cylinder can be converted into a forward thrust on the paper core tube, and the paper core tube can move forward normally.
[0016] 2. During the last push, when the frontmost paper core tube touches the block in front and the whole set of paper core tubes cannot move forward any further, the resistance to the paper core tube increases significantly, and the sum of the rotational friction of the three tensioning wheels is less than the resistance to the paper core tube. Therefore, the three tensioning wheels are forced to rotate, thereby absorbing most of the thrust of the cylinder, so that the longitudinal pressure on the paper core tube is very small, thus preventing the paper core tube from being deformed, warped, or arched due to the greater pressure of the cylinder.
[0017] 3. During the piston rod extension stage of the last pushing process, if the paper core tube is blocked by the paper core tube in front and the actual movement of the push plate is less than twice the movement distance of the cylinder piston rod, then during the piston rod retraction stage, the movement distance of the push plate will also be less than twice the movement distance of the cylinder piston rod due to the action of the limit block, preventing the push plate from returning too far backwards.
[0018] 4. The maximum pushing distance of the paper core tube can reach twice the stroke of the cylinder piston rod, that is, the length of the cylinder piston rod is only equal to half of the maximum pushing distance. Therefore, it is small in size, compact in structure, low in cost, simple to control, and there is no need to calculate in advance the actual moving distance of the paper core tube in the last pushing stroke. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the path of the paper core tube being transferred from the core storage rack to the V-shaped groove through the transport mechanism.
[0020] Figure 2 It is a schematic diagram of the overall structure of a specific embodiment of the present invention.
[0021] Figure 3 yes Figure 2 Schematic diagram of the longitudinal projection structure of the structure shown.
[0022] Figure 4 yes Figure 2 The structure shown is a three-dimensional schematic diagram after the V-shaped groove is hidden.
[0023] Figure 5 yes Figure 4 The structure shown is a schematic diagram of the three-dimensional structure expressed from another angle.
[0024] Figure 6 yes Figure 2 Schematic diagram of the AA cross-sectional structure.
[0025] Figure 7 yes Figure 3 Schematic diagram of the BB cross-section structure.
[0026] Figure 8 It is a schematic diagram of the starting state of the forward phase of the normal push process.
[0027] Fig. 9It is a schematic diagram of the motion state of the guide wheel and wire rope during the forward stage of the normal pushing process.
[0028] Fig.10 It is a schematic diagram of the final state of the forward phase of the normal push process.
[0029] Fig.11 It is a schematic diagram of the motion state of the guide wheel and wire rope during the return phase of the normal pushing process.
[0030] Fig.12 This is a schematic diagram of the starting state of the first sub-stage of the forward phase of the last push process.
[0031] Fig.13 This is a schematic diagram of the starting state of the second sub-stage of the forward phase of the last push process.
[0032] Fig.14 This is a schematic diagram of the final state of the second sub-stage of the forward phase of the last push process.
[0033] Fig.15 This is a schematic diagram of the starting state of the second sub-stage of the return phase of the last push process.
[0034] Fig.16 This is a schematic diagram of the final state of the second sub-stage of the return phase of the last push process. DETAILED DESCRIPTION
[0035] Figure 2 , Figure 3 , Figure 4 , Figure 5 The paper core tube automatic pushing device shown comprises a fixed support 10, a slider 11, a first guide rail 1, a push plate 71 for abutting against the end surface of the paper core tube, and a V-shaped groove 7 for storing the paper core tube. The V-shaped groove 7 is made of metal, and the extension direction of the first guide rail 1 is longitudinal. The longitudinal projection position of the push plate 71 is aligned with the groove cavity of the V-shaped groove 7, and the push plate 71 is fixedly connected to the slider 11; a stopper 72 for blocking the paper core tube is provided at the front end of the groove cavity of the V-shaped groove 7; a slider driving mechanism for driving the slider 11 to move longitudinally along the first guide rail 1 is also provided, and the slider driving mechanism comprises a cylinder 3, a sliding seat 21, a second guide rail 2, a wire rope transmission pair, and a chain transmission pair. The second guide rail 2 is parallel to the first guide rail 1, and the sliding seat 21 is installed on the second guide rail 2. The piston rod 31 of the cylinder drives the connected sliding seat 21; the sliding seat 21 is also provided with a limit block 210 for limiting the backward movement of the slider 11 and the push plate 71, and the limit block 210 is located behind the slider 11.
[0036] Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The chain transmission pair shown includes two front and rear sprockets and a chain 51 wrapped around the two sprockets, and the slider 11 is fixedly connected to the links of the chain 51; the wire rope transmission pair includes a wire rope 61, two front and rear guide wheels 6, and three front, middle and rear tensioning wheels 4, and the rotating shafts 40 of the three tensioning wheels 4 are fixedly installed on the fixed support 10, wherein the vertical position of the tensioning wheel 4 in the middle is higher than the other two tensioning wheels 4 on the front and rear sides, and the positions of the tensioning wheels 4 on the front and rear sides are fixed, while the vertical position of the tensioning wheel 4 in the middle is adjustable. The wire rope 61 passes around two guide wheels 6 and three tensioning wheels 4; the rotating shafts 60 of the front and rear guide wheels are installed on the sliding seat 21 and move longitudinally with the sliding seat 21, and the rotating shafts 50 of the front and rear sprocket wheels are also installed on the sliding seat 21 and move longitudinally with the sliding seat. The guide wheel 6 on the front side is coaxially fixedly connected with the sprocket 5 on the front side and rotates synchronously, and the guide wheel 6 on the rear side is coaxially fixedly connected with the sprocket 5 on the rear side and rotates synchronously; the sum of the rotational friction forces generated during the rotation of the three tensioning wheels 4 is greater than the sum of the rotational friction forces generated during the rotation of the two guide wheels 6 and the two sprocket wheels 5.
[0037] The use principle and use process of the above embodiment are as follows:
[0038] Since the weight of the paper core tube 8 is not large and the friction between the surface of the paper core tube 8 and the surface of the metal V-groove 7 is not large, before operation, the tension of the wire rope 61 can be adjusted by adjusting the vertical position of the tensioning wheel 4 in the middle, so that the sum of the rotational friction generated during the rotation of the three tensioning wheels 4 (i.e., the rotational friction between the wheel body of the tensioning wheel 4 and the rotating shaft 40) is greater than the friction resistance generated by the surface of the V-groove 7 to all the paper core tubes in the V-groove cavity during the last pushing process. The purpose is to make the friction resistance generated by all the paper core tubes in the V-groove cavity (equivalent to the backward resistance to the slider 11) not large enough to rotate the three tensioning wheels 4 through the chain, chain shaft, guide wheel and wire rope.
[0039] Each round of paper core tube pushing process in the above embodiment includes multiple normal pushing processes and the last pushing process, and each pushing process includes a forward phase and a return phase, in which the cylinder piston rod 31 extends forward and in which the cylinder piston rod 31 retracts backward. Before each pushing process starts, the transport mechanism transports a paper core tube 8 to the initial position in the V-shaped groove 7.
[0040] The starting state of each normal push process is as follows Figure 8As shown, the piston rod 31 of the air cylinder is in a fully retracted state, the sliding seat 21 is at the rear end of its sliding track, the slider 11 is in front of the limit block 210 and contacts the limit block 210, the push plate 71 is located behind the paper core tube 8, and the paper core tube 8 just transported from the transport mechanism is at the initial position. In the forward stage of each normal pushing process, the piston rod 31 of the air cylinder extends forward at a speed v, driving the sliding seat 21 to slide forward along the second guide rail 2, and the front and rear guide wheels 6 and the front and rear sprocket wheels 5 move forward with the sliding seat 21 at a speed v. The three tensioning wheels 4 will not rotate due to the large friction between them and the rotating shaft 40, and the positions of the three tensioning wheels 4 are fixed, so the wire rope 61 section between the three tensioning wheels 4 (as shown in FIG. Fig. 9 The DE paragraphs in the middle are stationary relative to the three tension wheels 4, while the front and rear guide wheels 6 and the front and rear sprocket wheels 5 rotate counterclockwise at a linear velocity v, and the wire rope between the lower end points of the front and rear guide wheels 6 (i.e., the lower section of the wire rope) moves forward at a velocity 2v. Fig. 9 As shown, the chain 51 (i.e., the lower section of the chain) located between the lower ends of the front and rear sprockets 5 also moves forward at a speed of 2v, driving the slider 11 and the push plate 71 to move forward at a speed of 2v. The push plate 71 pushes the paper core tube 8 originally located at the initial position to move forward. The moving distance of the paper core tube 8 is twice the moving distance of the cylinder piston rod 31. The paper core tube 8 pushes the other paper core tubes 8 located in the front of the V-shaped groove 7 forward (except for the first normal pushing process); the final state of the forward stage of the normal pushing process is shown in FIG. Fig.10 As shown, Fig.10 The state shown is also the starting state of the return phase of the normal push process;
[0041] In the return phase of the normal pushing process, the piston rod 31 of the cylinder moves backward at a speed a, driving the sliding seat 21 to slide backward along the second guide rail 2, and the front and rear guide wheels 6 and the front and rear sprocket wheels 5 move backward at a speed a along with the sliding seat. The three tensioning wheels 4 do not rotate due to the large friction between them and the rotating shaft 40. The wire rope 61 (for example, Fig.11 The front and rear guide wheels 6 and the front and rear sprocket wheels 5 rotate clockwise at a linear velocity a, and the wire rope 61 between the lower end points of the front and rear guide wheels 6 moves backward at a velocity 2a. Fig.11 As shown, the chain 51 located between the lower ends of the front and rear sprockets moves backward at a speed of 2a, driving the slider 11 and the push plate 71 to move backward at a speed of 2a. The moving distance of the push plate 71 is twice the moving distance of the cylinder piston rod 31. The final state of the return stage of the normal pushing process is as shown in FIG. Figure 2 , Figure 7 As shown,
[0042] The starting state of the forward phase of the last push process is as follows Fig.12As shown, the last paper core tube 8 is located at the initial position, there are other paper core tubes 8 in front of the last paper core tube 8, the front paper core tube 8 has not yet contacted the stopper 72, but the longitudinal distance between the front paper core tube 8 and the stopper 72 is less than the length of the paper core tube 8, the piston rod 31 of the cylinder is in a fully retracted state, the sliding seat 21 is located at the rear end of its sliding track, the slider 11 is located in front of the limit block 210 and contacts the limit block 210, and the push plate 71 is located behind the last paper core tube 8. In the forward stage of the last pushing process, it is divided into two sub-stages. The first sub-stage is similar to the forward stage of the normal pushing process. The movement of each component is exactly the same as the forward stage of the normal pushing process. The piston rod 31 of the cylinder moves forward at a speed v and drives the last paper core tube 8 to move forward at a speed 2v. The last paper core tube 8 pushes all the paper core tubes 8 in front of it to move forward. When the frontmost paper core tube touches the stopper 72 and the whole group of paper core tubes cannot move forward, the first sub-stage of the forward stage ends and enters the second sub-stage of the forward stage. Fig.13 As shown; in the second sub-stage, the slider 11 and the push plate 71 are stationary, the chain 51 (i.e., the lower section of the chain) between the lower ends of the front and rear sprockets 5 is stationary, the wire rope 61 (i.e., the lower section of the wire rope) between the lower ends of the front and rear guide wheels 6 is stationary, and the sliding seat 21 continues to drive the front and rear guide wheels 6 and the front and rear sprockets 5 to move forward at a speed v, the front and rear guide wheels 6 and the front and rear sprockets 5 rotate clockwise at a linear speed v, the chain 51 (i.e., the upper section of the chain) between the upper ends of the front and rear sprockets 5 moves forward at a speed of 2v, the wire rope 61 (i.e., the upper section of the wire rope) between the upper ends of the front and rear guide wheels 6 moves forward at a speed of 2v, and the wire rope 61 rubs the three tensioning wheels to rotate at a linear speed of 2v, thereby absorbing the thrust of the cylinder 3 and preventing the thrust of the cylinder 3 from acting entirely on the paper core tube 8 and causing the paper core tube 8 to deform; when the piston rod of the cylinder 3 is fully extended, the second sub-stage of the forward stage ends, and the final state of the second sub-stage is as follows: Fig.14 As shown, Fig.14 The state shown is also the starting state of the return phase of the last push process;
[0043] In the return phase of the last push process, it is also divided into two sub-phases; the first sub-phase is similar to the return phase of the normal push process, and the movement speed and direction of each component are the same as those in the return phase of the normal push process. The piston rod 31 of the cylinder moves backward at a speed a, driving the sliding seat 21 (including the limit block 210) to slide backward along the second guide rail 2 at a speed a, thereby driving the slider 11 and the push plate 71 to move backward at a speed 2a. The moving distance of the push plate 71 and the slider 11 is twice the moving distance of the cylinder piston rod 31 and twice the moving distance of the limit block 210. When the slider 11 catches up with and touches the limit block 210, the first sub-phase of the return phase ends and enters the second sub-phase of the return phase, as shown in FIG. Fig.15 As shown; in the second sub-stage, the slider 11 and the push plate 71 are stationary relative to the sliding seat 21, the front and rear sprockets 5 and the front and rear guide wheels 6 stop rotating, and the sliding seat 21 continues to drive the front and rear guide wheels 6, the front and rear sprockets 5, the chain 51, and the wire rope 61 to translate backward at a speed a, and the slider 11 and the push plate 71 move backward at a speed a, and the wire rope 61 rubs the three tensioning wheels 4 to rotate at a linear speed a until the piston rod 31 of the cylinder is completely retracted, as shown in FIG. Fig.16 As shown; when the piston rod 31 of the cylinder is fully retracted, the sliding seat 21, the front and rear guide wheels 6, the front and rear sprocket wheels 5, and the push plate 71 return to their respective starting positions, thus completing the entire process of pushing a group of paper core tubes 8 into the V-shaped groove 7. Afterwards, the relative movement of the reel and the V-shaped groove 7 can be utilized to make the group of paper core tubes 8 simultaneously insert into the reel and leave the V-shaped groove 7, and then a new round of paper core tube pushing process can be started.
Claims
1. An automatic paper core tube pushing device, comprising a fixed support, a slider, a first guide rail, a push plate for abutting against the end surface of the paper core tube, and a V-shaped groove for storing the paper core tube, wherein the first guide rail extends in a longitudinal direction, the longitudinal projection position of the push plate is aligned with the groove cavity of the V-shaped groove, and the push plate is fixedly connected to the slider; a stopper for blocking the paper core tube is provided at the front end of the groove cavity of the V-shaped groove; and a slider driving mechanism for driving the slider to move longitudinally along the first guide rail is also provided, characterized in that: The slider driving mechanism includes a cylinder, a sliding seat, a second guide rail, a wire rope transmission pair, and a chain transmission pair. The second guide rail is parallel to the first guide rail, and the sliding seat is installed on the second guide rail. The piston rod of the cylinder drives the sliding seat; the chain transmission pair includes two front and rear sprockets and a chain wrapped around the two sprockets, and the slider is fixedly connected to the chain links of the chain; the wire rope transmission pair includes a wire rope, two front and rear guide wheels, and three front, middle and rear tensioning wheels. The wire rope passes around the two guide wheels and the three tensioning wheels. The rotating shafts of the three tensioning wheels are fixedly installed on the fixed support and are located in the middle The vertical position of the tensioning wheel in the middle is staggered with the vertical positions of the other two tensioning wheels; the rotating shafts of the front and rear guide wheels are installed on the sliding seat and move longitudinally with the sliding seat, the rotating shafts of the front and rear sprocket wheels are also installed on the sliding seat and move longitudinally with the sliding seat, the guide wheel on the front side is coaxially fixedly connected with the sprocket on the front side and rotates synchronously, and the guide wheel on the rear side is coaxially fixedly connected with the sprocket on the rear side and rotates synchronously; the sum of the rotational friction forces generated during the rotation of the three tensioning wheels is greater than the sum of the rotational friction forces generated during the rotation of the two guide wheels and the two sprocket wheels.
2. The automatic paper core tube pushing device according to claim 1, characterized in that: The total rotational friction force generated during the rotation of the three tension wheels is greater than the friction resistance generated by the V-shaped groove on all paper core tubes in the V-shaped groove cavity during the last pushing process.
3. The automatic paper core tube pushing device according to claim 1 or 2, characterized in that: A limit block for limiting the backward movement of the slider is also provided on the sliding seat, and the limit block is located behind the slider.
4. The automatic paper core tube pushing device according to claim 1 or 2, characterized in that: The tensioning wheels at the front and rear sides are fixed in position, and the tensioning wheel in the middle is vertically adjustable.
Citation Information
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