Raw paper conveying chain plate machine

Abstract

The invention relates to the technical field of paper roll production, and particularly discloses a raw paper conveying chain plate machine which comprises a conveying assembly and an overturning assembly, the conveying assembly is used for transferring raw paper rolls, the overturning assembly comprises a base, a movable table, a supporting seat and a push rod, the movable table is slidably matched on the base, a lifting mechanism is arranged on the movable table, and the supporting seat is arranged on the supporting seat. The supporting seat is rotationally connected to the lifting mechanism and comprises a first plate and a second plate, the first plate and the second plate are perpendicularly distributed, a positioning block is arranged on the first plate, an arc-shaped groove is formed in the positioning block, a buffer pad is further arranged in the positioning block and made of a flexible material, and the arc-shaped groove is matched with the arc-shaped groove. The push rod is obliquely arranged on the movable table; according to the raw paper conveying chain plate machine, overturning of the raw paper roll is achieved through the overturning structure, the pressure of the raw paper roll is evenly distributed on the supporting base in the overturning process, the stress area of the raw paper roll is increased, and therefore the raw paper roll is prevented from deforming.

Description

Technical Field

[0001] The invention relates to the technical field of paper roll production, and in particular to a base paper conveying chain plate machine. Background Art

[0002] Base paper rolls are raw paper rolls produced by paper mills without further processing. After a series of processes, the pulp is processed to form a continuous paper, which is then wound into rolls to form base paper rolls. The base paper rolls are transported to the warehouse by transport devices and stored in the warehouse.

[0003] In the related art, a chain conveyor is generally used to transport the base paper rolls. The chain conveyor drives the reducer through the motor, which in turn drives the active sprocket to rotate, thereby transmitting power to the chain. The chain plates on the chain are horizontal or inclined, and the materials are evenly distributed on the chain plates. As the chain moves, the chain plates carrying the materials move forward along the fixed track. Each section of the chain plate is supported by a number of hinged sheet rollers to ensure the stability and continuity of the materials during transportation. Since the base paper rolls are usually placed horizontally during transportation, after being transferred to the warehouse, it is usually necessary to flip the base paper rolls to a vertical state to improve the stability of the base paper rolls.

[0004] The Chinese patent application document with application publication number CN110239984A discloses a base paper roll transfer and feeding mechanism. The patent application document includes: a material guide bracket, a roll feed bracket, a roll transfer base, a translation bracket, a translation chain, a roll transfer motor, an adjustment support plate, a roll unwinding support plate, an adjustment cylinder, a rotating cylinder and a paper roll clamping plate. The roll feed bracket is connected with multiple roll feed rollers that are rotatable in sequence along the horizontal direction. The translation bracket is horizontally arranged on the upper side of the roll transfer base. The two sides above the translation chain are respectively connected and fixed to the middle parts of the two sides of the roller support. Reciprocating guide blocks are slidably arranged in the translation guide plates on both sides below the adjustment support plate. Adjustment connecting rods are arranged between the translation connecting plates and the rotating connecting rods at the output ends of the adjusting cylinders on both sides above the translation bracket. Paper roll clamping plates with arc-shaped structures are symmetrically arranged on both sides above the middle part of the unwinding support plate. The output end of the pull-roll cylinder is fixedly provided with a pull-roll connecting plate, and the output end of the stop-roll cylinder is provided with a stop-roll connecting plate.

[0005] The above patent application document can conveniently and efficiently clamp and flip the base paper roll. However, in the process of flipping the base paper roll in the above patent application document, the gravity of the base paper roll is entirely borne by its bottom edge, which can easily cause deformation or damage to the edge of the base paper roll. Summary of the invention

[0006] The present invention provides a base paper conveying chain plate machine, aiming to solve the problem in the related art that the bottom edge of the base paper roll is easily compressed, deformed or damaged when the base paper roll is turned over.

[0007] The base paper conveying chain plate machine of the present invention comprises: a conveying component and a turning component; The conveying assembly is used for transporting the base paper roll; The flip assembly includes a base, a movable platform, a support seat and a push rod. The movable platform is slidably fitted on the base. A lifting mechanism is provided on the movable platform. The support seat is rotatably connected to the lifting mechanism. The support seat includes a first plate and a second plate. The first plate is vertically distributed with the second plate. A positioning block is provided on the first plate. An arc-shaped groove is provided on the positioning block. A buffer pad is also provided in the positioning block. The buffer pad is made of a flexible material and has deformation capability. The push rod is tilted on the movable platform. The push rod is used to push the base paper roll from the side to rotate it to a vertical state.

[0008] Beneficial effect: when the base paper roll moves to the end of the conveying assembly, the first plate and the second plate are stuck at the end of the base paper roll, and the center of gravity of the base paper roll gradually moves until it leaves the conveying assembly. During this process, the lifting mechanism drives the support seat to descend, so that the base paper roll rotates downward and is in an inclined state. When the base paper roll leaves the conveying assembly, the support seat moves to the lowest end. At this time, the push rod and the support seat jointly support the base paper roll, and then the push rod extends and pushes the base paper roll to rotate to a vertical distribution to achieve the flipping of the base paper roll. When the support seat supports the base paper roll, the bottom edge of the base paper roll stops at the buffer pad, and the base paper roll applies pressure to the buffer pad, so that the buffer pad is squeezed and deformed, thereby increasing the force area of ​​the base paper roll and preventing the bottom edge of the base paper roll from being deformed due to pressure during the flipping process.

[0009] Preferably, a positioning plate is provided on the second plate, and a positioning column is provided on the positioning plate. The positioning column can extend into the inner hole of the base paper roll, so as to limit the position of the base paper roll.

[0010] The effect is that the positioning column extends into the inner hole of the base paper roll, which can limit the base paper roll and prevent the base paper roll from detaching from the support seat.

[0011] Preferably, the movable platform is further provided with two conveyor belts distributed at intervals, and a placement groove is formed between the two conveyor belts, and the second plate can be placed in the placement groove.

[0012] The effect is that, after the base paper roll is turned over, its bottom end is supported on two conveyor belts, and the second plate is located in the placement groove, and the base paper roll can be transported out of the movable table through the conveyor belt.

[0013] Preferably, a dial block is provided on the first plate, a socket is provided on the movable platform, a control switch is provided in the socket, the control switch is electrically connected to the conveyor belt, and the dial block can extend into the socket to dial the control switch.

[0014] The effect is that when the support seat moves to the lowermost end, the shift block can be extended into the plug hole. In the process of the push rod pushing the base paper roll to rotate to a vertical state, the support seat and the base paper roll rotate synchronously, so that the shift block gradually approaches the control switch. When the base paper roll is in a vertical state, the shift block and the control switch stop, and the control switch can control the start of the conveyor belt.

[0015] Preferably, a support block is further provided on the conveying assembly, and the support block is rotatably connected to the conveying assembly via a torsion spring, and the upper surface of the support block is a curved surface structure.

[0016] Preferably, an annular baffle is further provided on the support block, the inner wall of the annular baffle can abut against the base paper roll, and the annular baffle is used to prevent the base paper roll from falling.

[0017] Preferably, the conveying assembly is provided with a coating assembly, and the coating assembly includes a coating frame, a gathering rod and a thermoplastic cutter. The coating frame is arranged on the annular baffle, and the coating frame is an annular structure with a protective film installed therein. There are two gathering rods, which are symmetrically distributed on the coating frame up and down. A driving mechanism is provided on the annular baffle, and the driving mechanism is used to drive the gathering rods to move closer to or away from each other. Each of the gathering rods is provided with a thermoplastic cutter.

[0018] The effect is that when the base paper roll passes through the laminating frame, the protective film can cover the surface of the base paper roll. After the base paper roll passes through the laminating frame, the gathering rods approach each other, and the protective film is gathered between two thermoplastic cutters. The thermoplastic cutters perform thermoplastic sealing and cutting on the protective film to achieve lamination of the base paper roll and prevent the outer surface of the base paper roll from being stained.

[0019] Preferably, a pressure sensor is further provided at the top of the laminating frame, the pressure sensor can abut against the base paper roll, and the pressure sensor is electrically connected to the driving mechanism.

[0020] By adopting the above technical solution, the beneficial effects of the present invention are: According to the base paper conveying chain plate machine of the present invention, when the base paper roll moves to the end of the conveying assembly, the first plate and the second plate are clamped at the end of the base paper roll, and the center of gravity of the base paper roll gradually moves until it is separated from the conveying assembly. During this process, the lifting mechanism drives the support seat to descend, so that the base paper roll rotates downward and is in an inclined state. When the base paper roll is separated from the conveying assembly, the support seat moves to the lowermost end. At this time, the push rod and the support seat jointly support the base paper roll, and then the push rod extends and pushes the base paper roll to rotate to a vertical distribution to achieve the flipping of the base paper roll. When the support seat supports the base paper roll, the bottom edge of the base paper roll stops against the buffer pad, and the base paper roll applies pressure to the buffer pad, so that the buffer pad is squeezed and deformed, thereby increasing the force area of ​​the base paper roll and preventing the bottom edge of the base paper roll from being deformed due to pressure during the flipping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a base paper conveying chain plate machine according to an embodiment of the present invention.

[0022] Figure 2 Schematic diagram of the support block structure of an embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of a flip assembly according to an embodiment of the present invention.

[0024] Figure 4 It is a schematic diagram of the support base structure of an embodiment of the present invention.

[0025] Figure 5 It is a schematic diagram of the installation of the film covering assembly according to an embodiment of the present invention.

[0026] Figure 6 It is a schematic diagram of the structure of the film covering component according to an embodiment of the present invention.

[0027] Reference numerals: 101. bracket; 102. chain plate; 103. transmission device; 104. guide rail; 201. base; 202. movable table; 2021. socket; 203. lifting mechanism; 204. support seat; 2041. first plate; 2042. second plate; 2043. positioning block; 2044. buffer pad; 2045. positioning plate; 2046. positioning column; 205. push rod; 2051. arc pad; 206. first driving member; 3. supporting block; 4. annular baffle; 5. conveyor belt; 6. shifting block; 701. laminating frame; 702. gathering rod; 703. thermoplastic cutter; 7041. third driving member; 7042. driving gear; 705. pressure sensor. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] like Figures 1 to 6 As shown, the base paper conveying chain machine of the present invention comprises: a conveying component and a turning component.

[0030] Specifically, Figure 1 As shown, the conveying assembly is a chain conveyor in conventional technology, and the turning assembly is arranged beside the conveying assembly. The conveying assembly is used for transferring the base paper roll, and the turning assembly is used for turning the base paper roll.

[0031] like Figure 1 and Figure 2As shown, the conveying assembly includes a bracket 101, a chain, a chain plate 102, a transmission device 103 and a guide rail 104. The chain is rotatably matched on the bracket 101, the chain plate 102 is fixedly connected to the chain, the transmission device 103 is a motor, which is fixedly connected to the bracket 101, and the transmission device 103 is used to drive the chain to circulate on the bracket 101. Guide rails 104 are also provided on both sides of the bracket 101, and the guide rails 104 are used to prevent the base paper roll from deflecting when moving. A support block 3 is provided at the end of the bracket 101, and the support block 3 is rotatably connected to the bracket 101 through a second torsion spring. The upper surface of the support block 3 is an inwardly concave arc surface structure. The support block 3 is also provided with an annular baffle 4, and the inner wall of the annular baffle 4 is abutted against the base paper roll, and the annular baffle 4 is used to prevent the base paper roll from falling.

[0032] like Figure 1 , Figure 3 and Figure 4 As shown, the flip assembly includes a base 201, a movable platform 202, a support seat 204 and a push rod 205. The base 201 is located next to the end of the bracket 101. The movable platform 202 is slidably fitted on the base 201. A first driving member 206 is provided on the base 201. The first driving member 206 is a hydraulic cylinder. The output end of the first driving member 206 is fixedly connected to the movable platform 202. The first driving member 206 is used to drive the movable platform 202 to slide on the base 201. The movable platform 202 is provided with a lifting mechanism 203, which is a hydraulic cylinder. The support seat 204 is provided at the top of the lifting mechanism 203. The support seat 204 includes a first plate 2041 and a second plate 2042. The first plate 2041 and the second plate 2042 are vertically distributed. The first plate 2041 is rotatably connected to the lifting mechanism 203 through a first torsion spring. The second plate 2042 is fixedly connected to the first plate 2041. A positioning block 2043 is fixedly connected to the first plate 2041. The positioning block 2043 is provided with an arc groove. The positioning block 2043 is also provided with a buffer pad 2044. The buffer pad 2044 is abutted against the second plate 2042. The buffer pad 2044 is made of flexible rubber and has good deformation ability. The second plate 2042 is provided with a positioning plate 2045. The positioning plate 2045 is provided with a positioning column 2046. The positioning column 2046 is a truncated cone structure, which can extend into the inner hole of the base paper roll. The push rod 205 is obliquely distributed on the movable platform 202. A second driving member is provided inside the push rod 205. The second driving member is used to drive the push rod 205 to extend or shorten. An arc-shaped cushion block 2051 is provided at the top of the push rod 205. Two conveyor belts 5 are also provided on the movable platform 202. A placement groove is formed between the two conveyor belts 5. The second plate 2042 can be placed in the placement groove. A shift block 6 is provided on the first plate 2041. A socket 2021 is provided on the movable platform 202. A control switch is provided in the socket 2021. The control switch is electrically connected to the conveyor belt 5 and can control the start and stop of the conveyor belt 5. The shift block 6 can extend into the socket 2021 to touch the control switch.

[0033] In the initial state, the arc groove of the positioning block 2043 is flush with the arc surface structure of the support block 3. When the base paper roll moves to the end of the bracket 101, the base paper roll moves to the support block 3 and the positioning block 2043 driven by the chain plate 102. The front end of the base paper roll stops at the second plate 2042, and the positioning column 2046 extends into the inner hole of the base paper roll. The chain plate 102 continues to drive the base paper roll to move forward. The first driving member 206 drives the movable platform 202 to move synchronously with the base paper roll. The center of gravity of the base paper roll gradually moves forward and separates from the support block 3. During this process, the lifting mechanism 203 drives the support seat 204 to slowly descend, and the front end of the base paper roll gradually rotates downward and tilts. The support seat 204 rotates synchronously with the base paper roll, so that the first torsion spring accumulates force, and the base paper roll applies an inclined downward pressure on the support block 3, so that the support block 3 and The base paper roll rotates synchronously, the second torsion spring stores force, and the annular baffle 4 is always coaxially distributed with the base paper roll. When the base paper roll completely leaves the support block 3, the second torsion spring releases its elastic force, the support block 3 is reset, and the side wall of the base paper roll stops against the arc-shaped pad 2051 of the push rod 205. The push rod 205 and the support seat 204 jointly support the base paper roll. The second driving member drives the push rod 205 to extend and pushes the rear end of the base paper roll to rotate upward until the base paper roll is pushed to a vertical state. When the lifting mechanism 203 drives the support seat 204 to move to the lowermost end, the shift block 6 can be extended into the insertion hole 2021. In the process of the push rod 205 pushing the base paper roll to rotate to a vertical state, the support seat 204 rotates synchronously with the base paper roll, and the shift block 6 rotates in the insertion hole 2021. When the base paper roll rotates to a vertical state, the shift block 6 stops against the control switch. When the support seat 204 supports the base paper roll, the bottom edge of the base paper roll abuts against the buffer pad 2044, and the base paper roll applies pressure to the buffer pad 2044, so that the buffer pad 2044 is squeezed and deformed, thereby increasing the force-bearing area of ​​the base paper roll and preventing the bottom edge of the base paper roll from being deformed due to pressure during the flipping process.

[0034] like Figure 1 , Figure 5 and Figure 6As shown, a coating assembly is also provided at the end of the bracket 101, and the coating assembly includes a coating frame 701, a retracting rod 702 and a thermoplastic cutter 703. The coating frame 701 is an annular structure, which is fixedly connected to the annular baffle 4. A protective film is installed in the coating frame 701. There are two retracting rods 702, which are symmetrically distributed at the upper and lower ends of the coating frame 701. Both retracting rods 702 are arc-shaped rods. The annular baffle 4 is provided with a driving mechanism, which includes a third driving member 7041 and a driving gear 7042. The third driving member 7041 is a hydraulic cylinder, which is fixedly connected to the top of the annular baffle 4. The output end of the third driving member 7041 is fixedly connected to the folding rod 702 located at the upper end of the laminating frame 701. The driving gear 7042 is rotatably matched on the laminating frame 701. The two folding rods 702 are provided with driving teeth and grooves. The driving gear 7042 meshes with the two folding rods 702 through the driving teeth and grooves. Each folding rod 702 is provided with a thermoplastic cutter 703, and the thermoplastic cutter 703 is located at the midpoint of the corresponding folding rod 702. A pressure sensor 705 is also provided at the top of the laminating frame 701. A control board is provided in the third driving member 7041, and the pressure sensor 705 is electrically connected to the control board.

[0035] When the base paper roll passes through the film coating frame 701 and moves onto the support block 3 under the drive of the chain plate 102, the protective film will cover the base paper roll. At this time, the pressure sensor 705 stops contacting the base paper roll covered with the protective film. When the base paper roll moves forward and breaks away from the pressure sensor 705, the pressure sensor 705 transmits an electrical signal to the control board, and the control board controls the third driving member 7041 to drive. The third driving member 7041 drives the retracting rod 702 above the film coating frame 701 to move The two retracting rods 702 move closer to each other, thereby gradually gathering the protective film on the side of the base paper roll to the thermoplastic cutter 703. When the two thermoplastic cutters 703 overlap, the thermoplastic cutter 703 starts to seal and cut the protective film with thermoplastics, thus completing the lamination of the base paper roll.

[0036] According to the base paper conveying chain plate machine of the embodiment of the present invention, in the initial state, the arc groove of the positioning block 2043 is flush with the arc surface structure of the support block 3. When the base paper roll moves to the end of the bracket 101, the base paper roll moves to the support block 3 and the positioning block 2043 under the drive of the chain plate 102. The front end of the base paper roll stops against the second plate 2042, and the positioning column 2046 extends into the inner hole of the base paper roll. The chain plate 102 continues to drive the base paper roll to move forward. The first driving member 206 drives the movable platform 202 to move synchronously with the base paper roll. The center of gravity of the base paper roll gradually moves forward and separates from the support block 3. During this process, the lifting mechanism 203 drives the support seat 204 to slowly descend, and the front end of the base paper roll gradually rotates downward and tilts. The support seat 204 rotates synchronously with the base paper roll, so that the first torsion spring accumulates force, and the base paper roll applies an inclined downward pressure on the support block 3, so that the support block 3 rotates synchronously with the base paper roll. The second torsion spring accumulates force, and the annular baffle 4 is always with the base paper roll The pressure sensor 705 stops against the base paper roll covered with the protective film. When the base paper roll moves forward and is out of contact with the pressure sensor 705, the pressure sensor 705 transmits an electrical signal to the control board. The control board controls the third driving member 7041 to drive. The third driving member 7041 drives the gathering rod 702 above the laminating frame 701 to move downward. The gathering rod 702 above the laminating frame 701 drives the driving gear 7042 to rotate when moving downward. The driving gear 7042 drives the gathering rod 702 below the laminating frame 701 to move upward. The two gathering rods 702 approach each other, thereby gradually gathering the protective film on the side of the base paper roll to the thermoplastic cutter 703. When the two thermoplastic cutters 703 overlap, the thermoplastic cutter 703 starts, thereby thermoplastically sealing and cutting the protective film, thereby completing the lamination of the base paper roll.

[0037] After the lamination is completed, the base paper roll is separated from the support block 3, and the side wall of the base paper roll is stopped against the arc-shaped pad 2051 of the push rod 205. The push rod 205 and the support seat 204 jointly support the base paper roll. The second driving member drives the push rod 205 to extend and pushes the rear end of the base paper roll to rotate upward until the base paper roll is pushed to a vertical state. When the support seat 204 supports the base paper roll, the bottom edge of the base paper roll is stopped against the buffer pad 2044. The base paper roll applies pressure to the buffer pad 2044, so that the buffer pad 2044 is squeezed and deformed, thereby increasing the force area of ​​the base paper roll and preventing the bottom edge of the base paper roll from being deformed due to pressure during the flipping process. When the lifting mechanism 203 drives the support seat 204 to move to the lowermost end, the shift block 6 can extend into the insertion hole 2021. When the push rod 205 pushes the base paper roll to rotate to a vertical state, the support seat 204 rotates synchronously with the base paper roll. The shift block 6 rotates in the insertion hole 2021. When the base paper roll rotates to a vertical state, the shift block 6 stops at the control switch. The control switch starts the conveyor belt 5, and the conveyor belt 5 transports the flipped base paper roll out of the movable table 202.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A base paper conveying chain plate machine, comprising: A conveying assembly, the conveying assembly is used to transport the base paper roll; It is characterized in that a flipping assembly is also provided, which includes a base, a movable platform, a support seat and a push rod, the movable platform is slidably fitted on the base, a lifting mechanism is provided on the movable platform, the support seat is rotatably connected to the lifting mechanism, the support seat includes a first plate and a second plate, the first plate and the second plate are vertically distributed, a positioning block is provided on the first plate, an arc-shaped groove is provided on the positioning block, a buffer pad is also provided in the positioning block, the buffer pad is made of a flexible material and has deformation ability, the push rod is obliquely arranged on the movable platform, and the push rod is used to push the base paper roll from the side to rotate it to a vertical state.

2. The base paper conveyor chain conveyor according to claim 1, characterized in that: The second plate is provided with a positioning plate, and the positioning plate is provided with a positioning post, and the positioning post can extend into the inner hole of the base paper roll, so as to limit the base paper roll.

3. The base paper conveyor chain conveyor according to claim 1, characterized in that: The movable platform is also provided with two conveyor belts which are spaced apart from each other, and a placement groove is formed between the two conveyor belts, and the second plate can be placed in the placement groove.

4. The base paper conveyor chain conveyor according to claim 3, characterized in that: The first plate is provided with a dial block, the movable platform is provided with a socket, a control switch is provided in the socket, the control switch is electrically connected to the conveyor belt, and the dial block can extend into the socket to dial the control switch.

5. The base paper conveyor chain conveyor according to claim 1, characterized in that: The conveying assembly is also provided with a support block, which is rotatably connected to the conveying assembly via a torsion spring, and the upper surface of the support block is a curved surface structure.

6. The base paper conveyor chain conveyor according to claim 5, characterized in that: The support block is also provided with an annular baffle, the inner wall of which can abut against the base paper roll, and the annular baffle is used to prevent the base paper roll from falling.

7. The base paper conveyor chain conveyor according to claim 6, characterized in that: The conveying assembly is provided with a coating assembly, and the coating assembly includes a coating frame, a gathering rod and a thermoplastic cutter. The coating frame is arranged on the annular baffle, and the coating frame is an annular structure with a protective film installed therein. There are two gathering rods, which are symmetrically distributed on the coating frame up and down. A driving mechanism is provided on the annular baffle, and the driving mechanism is used to drive the gathering rods to move closer to or away from each other. Each of the gathering rods is provided with a thermoplastic cutter.

8. The base paper conveyor chain conveyor according to claim 7, characterized in that: A pressure sensor is also provided at the top of the laminating frame. The pressure sensor can abut against the base paper roll, and the pressure sensor is electrically connected to the driving mechanism.

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