Paper roll conveying device

Abstract

The utility model relates to a kind of paper roll conveying devices, including rack, bearing unit, cylinder pressure assembly, power transmission mechanism and auxiliary control component.Bearing unit is symmetrically arranged on rack, and its paper roll support roller is constituted support surface by front roller, rear roller and belt.The piston rod end of cylinder pressure assembly is hinged with the linkage rod of bearing unit, for exerting pressure on paper roll.Power transmission mechanism drives rear roller rotation by motor, planetary gear transmission system, reversing bevel gear set and transmission shaft.Auxiliary control component includes air pressure regulating valve, electromagnetic reversing valve and position sensor, for adjusting pressure, controlling pressure action and monitoring position.The utility model can realize the automatic, stable conveying of paper roll, adapt to the tension control demand of different roll diameter and paper quality, improve conveying efficiency and reliability.

Description

Technical Field

[0001] This utility model belongs to the technical field of papermaking and post-processing machinery and equipment, and specifically relates to a paper roll conveying device. Background Technology

[0002] In the papermaking, printing, and packaging industries, roll paper conveying is a crucial step in the production process. Existing roll paper conveying devices mostly employ fixed roller supports combined with simple friction drives or direct motor drives. These devices often suffer from the following shortcomings: First, they struggle to adapt to tension fluctuations caused by changes in roll diameter during conveying, easily leading to paper that is too loose or too tight, or even breakage. Second, they have poor adjustability and adaptability for rolls of different specifications (such as width, diameter, and paper type), often requiring manual intervention. Third, the drive system has a simple structure, resulting in significant start-stop shocks and unstable transmission, affecting conveying accuracy and paper quality. Fourth, they lack integrated automatic control, making it inconvenient to adjust parameters such as clamping force and position, resulting in low automation. Therefore, there is an urgent need for a roll paper conveying device that can achieve stable, adaptive, and highly controllable performance. Utility Model Content

[0003] To solve the technical problems existing in the prior art and achieve the above objectives, this utility model provides a roll paper conveying device, including a frame, on which at least two sets of bearing units are symmetrically arranged, and a cylinder pressing assembly, a power conveying mechanism and auxiliary control components are provided to cooperate with the bearing units; The bearing unit includes a paper roll support roller, which has two mounting plates arranged in opposite directions. A front roller and a rear roller are arranged in parallel between the two mounting plates. A belt is wound around the front roller and the rear roller. A linkage rod is fixed between the two mounting plates. The cylinder clamping assembly includes a cylinder, a piston rod, and a clamping end located at the end of the piston rod, wherein the clamping end is connected to the linkage rod; The power transmission mechanism includes a motor, a planetary gear transmission system, a reversing bevel gear set, a coupling, and a drive shaft. The motor is connected to the planetary gear transmission system. The output end of the planetary gear transmission system is connected to the reversing bevel gear set. Each of the two output ends of the reversing bevel gear set is provided with a coupling. The coupling is connected to one end of the drive shaft. The drive shaft is mounted on the frame through a first bearing seat. The rear roller of the paper roll support roller is rotatably passed through the drive shaft. The auxiliary control components include a pneumatic regulating valve for adjusting the cylinder pressure, an electromagnetic directional valve for controlling the extension and retraction of the piston rod, and a position sensor for detecting the position of the linkage rod.

[0004] The front and rear rollers are respectively mounted on the two mounting plates via bearings at both ends.

[0005] The clamping end is hinged to the middle of the linkage rod, and the cylinder body is hinged to the frame.

[0006] The reversing bevel gear set has two coaxially arranged output ends, and each output end is connected to a drive shaft through a coupling.

[0007] The rear roller is hinged to the drive shaft.

[0008] The top of both sides of the frame is provided with a second bearing seat, which is used to install the paper roll.

[0009] This invention has the following features and benefits: First, the belt-type support unit provides a soft and evenly frictional support surface, effectively protecting the paper roll surface and reducing wear and indentations. Second, the adjustable pressure applied by the cylinder clamping assembly actively adapts to changes in the paper roll diameter, maintaining stable and appropriate tension throughout the conveying process, preventing paper from loosening or becoming too tight and breaking, thus improving conveying quality and reliability. Third, the power conveying mechanism integrates a planetary gear system and a reversing bevel gear set, resulting in smooth transmission, high torque, and a compact structure. Dual-sided synchronous drive ensures balanced conveying force and smooth start-stop. Fourth, the integration of auxiliary control components enables stepless adjustment of clamping force, automatic action control, and real-time status monitoring, greatly improving the automation level and ease of operation of the device and reducing reliance on manual experience. Finally, the overall symmetrical and modular design makes it highly adaptable, easy to maintain, and widely applicable to efficient and intelligent conveying scenarios for different specifications of paper rolls. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the working structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is a schematic diagram of the paper roll support roller structure of this utility model.

[0011] In the diagram: 1-Frame; 11-Second bearing seat; 2-Bearing unit; 21-Mounting plate; 22-Front roller; 23-Rear roller; 24-Belt; 25-Linkage rod; 3-Cylinder clamping assembly; 31-Cylinder; 32-Piston rod; 33-Clamping end; 4-Power transmission mechanism; 41-Motor; 42-Planetary gear transmission system; 43-Reversing bevel gear set; 44-Coupling; 45-Drive shaft; 46-First bearing seat; 5-Auxiliary control components; 51-Pneumatic regulating valve; 52-Solenoid reversing valve; 53-Position sensor; 6-Paper roll. Detailed Implementation

[0012] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0013] like Figures 1 to 4 As shown, this embodiment provides a paper roll conveying device, which mainly includes a frame 1, two sets of symmetrically arranged bearing units 2, a cylinder pressing assembly 3, a power conveying mechanism 4, and auxiliary control components 5.

[0014] The frame 1, serving as the basic support structure of the entire device, is welded from structural steel and possesses sufficient rigidity and stability. Symmetrically mounted second bearing seats 11 are installed on the top of both sides of the frame 1 to support and mount the mandrels of the paper rolls 6 to be conveyed, forming the feeding station.

[0015] The specific structure of the bearing unit 2 is as follows: The core of each bearing unit 2 is a paper roll support roller, which is framed by two parallel and relatively vertically arranged mounting plates 21. Between the two mounting plates 21, a front roller 22 and a rear roller 23 are mounted in parallel, with both ends of the front roller 22 and the rear roller 23 rotatably supported on the mounting plates 21 via rolling bearings. A closed annular belt 24 is tightly wound around the front roller 22 and the rear roller 23, thus forming a flexible bearing surface. A horizontal linkage rod 25 is fixed between the upper parts of the two mounting plates 21.

[0016] The cylinder clamping assembly 3 provides adjustable downward pressure. This assembly includes a cylinder 31, a piston rod 32, and a clamping end 33 mounted on the free end of the piston rod 32. The tail of the cylinder 31 is hinged to a corresponding support on the frame 1 via a pin, allowing it to swing. The clamping end 33 is hinged to the middle of the linkage rod 25 of the support unit 2 via a pin. This double-hinged structure allows the cylinder 31 to drive the entire support unit 2 to swing within a certain angle range around the axis of its rear roller 23 during extension and retraction, thereby applying or releasing pressure to the paper roll 6 placed on its belt 24.

[0017] The power transmission mechanism 4 provides the driving torque. This mechanism includes a variable frequency speed control motor 41. The output shaft of the motor 41 is connected to the input end of a planetary gear transmission system 42 via a coupling, achieving a single-stage reduction and increasing torque. The output end of the planetary gear transmission system 42 is connected to the input end of a reversing bevel gear set 43. The reversing bevel gear set 43 has two output ends that rotate in the same direction. Each output end is connected to a drive shaft 45 via a flexible coupling 44. The drive shaft 45 is securely supported on the frame 1 by a first bearing seat 46. Crucially, the rear roller 23 of the bearing unit 2 is rotatably "sleeved" onto the corresponding drive shaft 45 via bearings at both ends, meaning the drive shaft 45 passes through the center of the rear roller 23, but the two can rotate freely relative to each other. When the motor 41 starts, power is transmitted to the drive shaft 45 via the planetary gear transmission system 42, the reversing bevel gear set 43, and the coupling 44, causing it to rotate. Since the rear roller 23 is hinged to the drive shaft 45, meaning the rear roller 23 has frictional contact with the paper roll 6 via the belt 24, the rotation of the drive shaft 45 does not directly drive the rear roller 23 to rotate. Instead, when the cylinder 31 is pressed down to generate sufficient friction between the paper roll 6 and the belt 24, the rolling of the paper roll 6 will cause the belt 24 and the rear roller 23 to passively rotate on the stationary drive shaft 45, thereby achieving the conveying of the paper roll. Of course, in another embodiment, the rear roller 23 can also be fixed to the drive shaft 45 by means of a key connection or other means, so that the drive shaft 45 directly drives the rear roller 23 to rotate actively, and the paper roll is driven by friction through the belt 24.

[0018] Auxiliary control component 5 is used to achieve automated control: This component includes a precision air pressure regulating valve 51, connected between the air source and the cylinder 31, used to precisely set and adjust the working pressure of the cylinder 31, thereby controlling the clamping force on the paper roll. A two-position five-way solenoid directional valve 52 is used to control the direction of compressed air entering the cylinder 31, thereby controlling the extension (clamping) and retraction (releasing) actions of the piston rod 32. A position sensor 53 (such as an angle sensor or a linear displacement sensor) is mounted on the frame 1 to detect the real-time position or swing angle of the linkage rod 25. The sensor signal can be fed back to the control system (such as a PLC) to monitor the status of the carrying unit 2 or participate in the formation of closed-loop control logic.

[0019] Working principle and operation process: Initially, the piston rod 32 of cylinder 31 is in the retracted state, and the bearing surface of the belt 24 of bearing unit 2 is in a low position. The operator uses a hoisting device to place the large-diameter paper roll 6 onto the second bearing seat 11 at the top of the frame to complete the feeding.

[0020] When the device is started, the control system issues a command, and the electromagnetic reversing valve 52 actuates, causing the piston rod 32 of the cylinder 31 to extend and push the bearing unit 2 to swing upward around the rear roller axis until the surface of its belt 24 reliably contacts the bottom of the paper roll 6 and applies a preset pressure. This pressure is preset by the air pressure regulating valve 51 to ensure that sufficient frictional driving force is generated without damaging the paper roll.

[0021] When paper rolls need to be conveyed, the variable frequency speed control motor 41 is started. Power is transmitted through the transmission system, ultimately causing the drive shaft 45 to rotate at a stable speed. Under the pressure of the cylinder, static friction is generated between the paper roll 6 and the belt 24, thereby driving the paper roll 6 to roll forward on the belt 24, realizing conveying. The position sensor 53 monitors the posture of the carrying unit 2 in real time. As the diameter of the paper roll gradually decreases during the conveying process, the carrying unit 2 will continuously follow and maintain contact pressure under the thrust of the cylinder, maintaining a basically stable tension.

[0022] After the conveying task is completed, motor 41 stops. Electromagnetic reversing valve 52 reverses, piston rod 32 of cylinder 31 retracts, and carrying unit 2 descends, disengaging from the paper roll 6. Subsequent operations or replacement of the paper roll can then proceed.

[0023] This embodiment achieves automation, stability, and high adaptability in roll paper conveying through the above structure, and is particularly suitable for continuous production and conveying of large and heavy roll paper.

Claims

1. A roll paper conveying device, comprising a frame (1), characterized in that: At least two sets of bearing units (2) are symmetrically arranged on the frame (1), and a cylinder clamping assembly (3), a power transmission mechanism (4) and an auxiliary control component (5) are provided to cooperate with the bearing unit (2). The bearing unit (2) includes a paper roll support roller, which has two mounting plates (21) arranged opposite to each other. A front roller (22) and a rear roller (23) are arranged in parallel between the two mounting plates (21). A belt (24) is wrapped around the front roller (22) and the rear roller (23). A linkage rod (25) is fixed between the two mounting plates (21). The cylinder clamping assembly (3) includes a cylinder (31), a piston rod (32) and a clamping end (33) located at the end of the piston rod (32), and the clamping end (33) is connected to the linkage rod (25). The power transmission mechanism (4) includes a motor (41), a planetary gear transmission system (42), a reversing bevel gear set (43), a coupling (44), and a drive shaft (45). The motor (41) is connected to the planetary gear transmission system (42). The output end of the planetary gear transmission system (42) is connected to the reversing bevel gear set (43). Each of the two output ends of the reversing bevel gear set (43) is provided with a coupling (44). The coupling (44) is connected to one end of the drive shaft (45). The drive shaft (45) is mounted on the frame (1) through a first bearing seat (46). The rear roller (23) of the paper roll support roller is rotatably passed through the drive shaft (45). The auxiliary control component (5) includes a pneumatic regulating valve (51) for adjusting the pressure of the cylinder (31), an electromagnetic reversing valve (52) for controlling the extension and retraction of the piston rod (32), and a position sensor (53) for detecting the position of the linkage rod (25).

2. The paper roll conveying device according to claim 1, characterized in that: The front roller (22) and the rear roller (23) are respectively mounted on the two mounting plates (21) by bearings at both ends.

3. The roll paper conveying device according to claim 1, characterized in that: The clamping end (33) is hinged to the middle of the linkage rod (25), and the cylinder body of the cylinder (31) is hinged to the frame (1).

4. The paper roll conveying device according to claim 1, characterized in that: The reversing bevel gear set (43) has two coaxially arranged output ends, each of which is connected to a drive shaft (45) via a coupling (44).

5. The roll paper conveying device according to claim 1, characterized in that: The rear roller (23) is hinged to the drive shaft (45).

6. The roll paper conveying device according to any one of claims 1-5, characterized in that: The top of both sides of the frame is provided with a second bearing seat (11), which is used to install the paper roll (6).

Images