Plastic film unwinding device

Abstract

The utility model discloses a plastic film unwinding device, which relates to the technical field of unwinding devices, and comprises a rack, an unwinding roller, a connecting frame, a hydraulic cylinder, a driving mechanism and a limiting mechanism, the driving mechanism drives a pinch roller to rotate and drives a plastic film on the unwinding roller to be rotated and unwound, and when the pinch roller needs to be replaced, the connecting frame is connected with the hydraulic cylinder. A user only needs to drive the check block to move downwards into the connecting cylinder through a handle, the pressing wheel can be taken down from the connecting cylinder, then a new pressing wheel is installed on the connecting cylinder, the check block moves downwards into the connecting cylinder through an extrusion inclined face on the check block, the spring is compressed, the pressing wheel continues to be moved to make the pressing wheel make contact with the end of the rotating shaft, and at the moment, the check block moves upwards under the elastic force effect of the spring. And in the whole process, the pressing wheel is relatively convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of unwinding devices, in particular to a plastic film unwinding device. Background Art

[0002] When processing plastic film, the rolled plastic film needs to be placed on the unwinding roller of the unwinding device for rotational unwinding. The unwinding roller is driven to rotate by a plastic pressure wheel. After long-term use, the surface of the plastic pressure wheel will be worn and needs to be replaced. The existing pressure wheel is generally installed on the rotating shaft by bolts, and the disassembly and assembly process is cumbersome, time-consuming and labor-intensive. Utility Model Content

[0003] The purpose of the utility model is to provide a plastic film unwinding device to overcome the above-mentioned defects in the prior art.

[0004] A plastic film unwinding device comprises a frame, an unwinding roller, a connecting frame, a hydraulic cylinder, a driving mechanism and a limiting mechanism, wherein two ends of the unwinding roller are respectively placed in mounting grooves on mounting plates on both sides of the frame, one end of the connecting frame is hinged to the frame through a pin shaft, the cylinder body of the hydraulic cylinder is hinged to a fixed plate in the frame through a pin shaft, the piston rod end of the hydraulic cylinder is hinged to the connecting frame through a pin shaft, the driving mechanism is arranged on the connecting frame and is used to drive a rotating shaft installed on the other end of the connecting frame to rotate, the two ends of the rotating shaft are respectively detachably connected with pressure wheels through the limiting mechanisms thereon, and a pressure roller is also provided in the frame.

[0005] Preferably, the driving mechanism comprises a motor, a bevel gear 1 and a bevel gear 2. The motor is mounted on a connecting frame and a bevel gear 1 is provided on an output shaft thereof. The bevel gear 1 is meshed with the bevel gear 2 on the rotating shaft.

[0006] Preferably, the limiting mechanism includes a connecting cylinder, a stopper and a spring, and hollow connecting cylinders are respectively provided at both ends of the rotating shaft. A positioning strip that cooperates with a positioning groove on the pressure wheel is provided on the outer side of the connecting cylinder. The stopper is slidably inserted into the connecting cylinder and an extrusion slope is provided on the outward side thereof. A baffle is provided at the lower end of the stopper, and the baffle is connected to the inner wall of the connecting cylinder through a spring.

[0007] Preferably, there are a plurality of springs.

[0008] Preferably, a handle is provided on the outer side of the baffle.

[0009] The utility model has the following advantages:

[0010] When the utility model is in use, the pressure wheel is driven to rotate by the driving mechanism, and the plastic film on the unwinding roller is driven to be rotated and unwound. When the pressure wheel needs to be replaced, it is only necessary to drive the stopper to move down into the connecting cylinder with the handle, so that the pressure wheel can be removed from the connecting cylinder, and then a new pressure wheel can be installed in the connecting cylinder. The stopper is moved down into the connecting cylinder through the extrusion inclined surface on the stopper, and the spring is compressed. The pressure wheel is continued to be moved to make it contact with the end of the rotating shaft. At this time, the stopper moves up under the action of the spring elastic force, so that the stopper limits the pressure wheel. The whole process of disassembly and assembly of the pressure wheel is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0012] Figure 2 It is a side view of the utility model.

[0013] Figure 3 It is a structural schematic diagram of the connecting frame and the driving mechanism of the utility model.

[0014] Figure 4 It is a structural schematic diagram of the rotating shaft and the limiting mechanism of the utility model.

[0015] Figure 5 It is a side view of the rotating shaft and the limiting mechanism of the utility model.

[0016] Among them: 1. frame; 11. pressure roller; 2. unwinding roller; 3. mounting plate; 31. mounting groove; 4. connecting frame; 5. hydraulic cylinder; 6. driving mechanism; 61. motor; 62. bevel gear one; 63. bevel gear two; 7. rotating shaft; 8. limiting mechanism; 81. connecting cylinder; 82. positioning strip; 83. block; 831. extrusion slope; 84. baffle; 841. handle; 85. spring; 9. pressure wheel. DETAILED DESCRIPTION

[0017] The specific implementation methods of the utility model are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model.

[0018] like Figure 1-5As shown, the utility model provides a plastic film unwinding device, including a frame 1, an unwinding roller 2, a connecting frame 4, a hydraulic cylinder 5, a driving mechanism 6 and a limiting mechanism 8, the two ends of the unwinding roller 2 are respectively placed in the mounting grooves 31 on the mounting plates 3 on both sides of the frame 1, one end of the connecting frame 4 is hinged to the frame 1 through a pin shaft, the cylinder body of the hydraulic cylinder 5 is hinged to the fixed plate in the frame 1 through a pin shaft, the piston rod end of the hydraulic cylinder 5 is hinged to the connecting frame 4 through a pin shaft, the driving mechanism 6 is arranged on the connecting frame 4 and is used to drive the rotating shaft 7 installed on the other end of the connecting frame 4 to rotate, the two ends of the rotating shaft 7 are respectively detachably connected with the pressure wheel 9 through the limiting mechanisms 8 thereon, and the frame 1 is also provided with a pressure roller 11.

[0019] It should be noted that the driving mechanism 6 includes a motor 61, a bevel gear 1 62 and a bevel gear 2 63. The motor 61 is mounted on the connecting frame 4 and a bevel gear 1 62 is provided on its output shaft. The bevel gear 1 62 is meshed with the bevel gear 2 63 on the rotating shaft 7.

[0020] In addition, the limiting mechanism 8 includes a connecting tube 81, a stopper 83 and a spring 85. The two ends of the rotating shaft 7 are respectively provided with a hollow connecting tube 81. The outer side of the connecting tube 81 is provided with a positioning strip 82 that cooperates with the positioning groove on the pressure wheel 9. The stopper 83 is slidably inserted into the connecting tube 81 and an extrusion slope 831 is provided on the outward side. A baffle 84 is provided at the lower end of the baffle 83. A handle 841 is provided on the outer side of the baffle 84 to facilitate the movement of the baffle 84. The baffle 84 is connected to the inner wall of the connecting tube 81 through a plurality of springs 85.

[0021] Specific implementation and principle:

[0022] In actual application of the utility model, the piston rod of the hydraulic cylinder 5 drives the connecting frame 4 to rotate, so that the two pressing wheels 9 are pressed on the plastic film wound on the unwinding roller 2, the bevel gear 1 62 on the output shaft of the motor 61 drives the bevel gear 2 63 and the rotating shaft 7 to rotate, and the pressing wheel 9 on the rotating shaft 7 drives the unwinding roller 2 to rotate, and the plastic film is rotated and unwound;

[0023] When the pressure wheel 9 needs to be replaced, the handle 841 is used to drive the block 83 to move downward, the spring 85 is compressed, and the pressure wheel 9 is removed from the connecting tube 81. Then the handle 841 is released, and under the elastic force of the spring 85, the block 83 moves upward and extends out of the connecting tube 81. Then the new pressure wheel 9 is installed in the connecting tube 81. Through the extrusion slope 831 on the block 83, the block 83 moves downward into the connecting tube 81, the spring 85 is compressed, and the pressure wheel 9 continues to be moved so that the pressure wheel 9 contacts the end of the rotating shaft 7. At this time, the block 83 moves upward under the elastic force of the spring 85, so that the block 83 limits the pressure wheel 9.

[0024] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A plastic film unwinding device, characterized in that: The invention comprises a frame (1), an unwinding roller (2), a connecting frame (4), a hydraulic cylinder (5), a driving mechanism (6) and a limiting mechanism (8), wherein the two ends of the unwinding roller (2) are respectively placed in mounting grooves (31) on mounting plates (3) on both sides of the frame (1), one end of the connecting frame (4) is hinged to the frame (1) through a pin, the cylinder body of the hydraulic cylinder (5) is hinged to a fixed plate in the frame (1) through a pin, the piston rod end of the hydraulic cylinder (5) is hinged to the connecting frame (4) through a pin, the driving mechanism (6) is arranged on the connecting frame (4) and is used to drive a rotating shaft (7) installed on the other end of the connecting frame (4) to rotate, the two ends of the rotating shaft (7) are respectively detachably connected to a pressing wheel (9) through the limiting mechanism (8) thereon, and a pressing roller (11) is also arranged in the frame (1).

2. A plastic film unwinding device according to claim 1, characterized in that: The driving mechanism (6) comprises a motor (61), a bevel gear 1 (62) and a bevel gear 2 (63); the motor (61) is mounted on a connecting frame (4) and a bevel gear 1 (62) is provided on its output shaft; the bevel gear 1 (62) is meshed with the bevel gear 2 (63) on the rotating shaft (7).

3. A plastic film unwinding device according to claim 1, characterized in that: The limiting mechanism (8) comprises a connecting tube (81), a stopper (83) and a spring (85). A hollow connecting tube (81) is respectively provided at both ends of the rotating shaft (7). A positioning strip (82) is provided on the outer side of the connecting tube (81) to cooperate with a positioning groove on the pressing wheel (9). The stopper (83) is slidably inserted into the connecting tube (81) and an extrusion inclined surface (831) is provided on the outward side thereof. A baffle (84) is provided at the lower end of the stopper (83), and the baffle (84) is connected to the inner wall of the connecting tube (81) through a spring (85).

4. A plastic film unwinding device according to claim 3, characterized in that: The springs (85) are provided in plurality.

5. A plastic film unwinding device according to claim 3, characterized in that: A handle (841) is provided on the outer side of the baffle (84).

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