Tensioning mechanism

Abstract

The tensioning mechanism comprises a bottom plate, clamping roller assemblies are arranged at the left end and the right end of the top end of the bottom plate, a supporting plate is fixedly connected to the rear end of the bottom plate, a sliding groove block is fixedly connected to the middle of the rear end of the supporting plate, a sliding groove is formed in the middle of the front end of the supporting plate, and a sliding block is connected to the sliding groove in a sliding mode. According to the plastic film tensioning device, a plastic film on the rolling wheels can be extruded and clamped through stretching and retracting of the spring, deviation in the tensioning process is avoided, and then the plastic film on the rolling wheels is prevented from falling off in the moving process through the limiting rings on the two sides of the first rolling wheel; a rotating handle drives a threaded rod to enable a second roller assembly on a sliding block of the threaded rod to move up and down so as to adjust the tensioning degree of a plastic film, then a servo motor is started to drive a second roller in the second roller assembly on a supporting block to rotate, and then the plastic film is driven to move forwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of tensioning mechanism technical field, especially a kind of tensioning mechanism. BACKGROUND

[0002] Plastic film is a kind of thin and soft plastic products, in our daily life and many industrial fields are widely used.

[0003] From material, common polyethylene (PE) plastic film, it has good flexibility, low temperature resistance, is often used in food packaging, preservative film etc. field. Polyvinyl chloride (PVC) plastic film is often used in building materials, for example, some pipe wrapping protection. Polypropylene (PP) plastic film transparency is high, strength is better, is widely used in printing, label making etc.

[0004] The existing tensioning device cannot adjust the force when tensioning, and may be too loose or too tight when tensioning, resulting in problems such as wrinkles or rupture of plastic film. In order to overcome these disadvantages, the utility model provides a kind of tensioning mechanism. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the shortcomings in the prior art, and provides a kind of tensioning mechanism.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme: a kind of tensioning mechanism, including bottom plate, the left and right ends of the top of the bottom plate are provided with clamping roller assembly, the rear end of the bottom plate is fixedly connected with support plate, the rear end of the support plate is fixedly connected with sliding groove block in the middle, the front end of the support plate is provided with sliding groove in the middle, the sliding groove is slidably connected with sliding block, the front end of the sliding block is provided with second roller assembly, the front end of the left side of the support plate is fixedly connected with fixed frame, the front end of the fixed frame is provided with second roller assembly.

[0007] Further, the clamping roller assembly includes a second fixed plate fixedly connected with the left and right ends of the top of the bottom plate, a plurality of telescopic rods are fixedly connected with the top of the second fixed plate, springs are fixedly connected with the top of the second fixed plate and around the telescopic rods, the output end of the telescopic rod is provided with a first roller assembly.

[0008] Further, the first roller assembly includes a first rotating plate fixedly connected with the output end of the telescopic rod, a first rotating rod is rotatably connected with the first rotating plate, a first roller is fixedly connected with the first rotating rod, and a limiting ring is arranged on both sides of the first roller.

[0009] Further, the second roller assembly includes a second rotating plate arranged at the front end of the sliding block, a second rotating rod is rotatably connected with the second rotating plate, and a second roller is fixedly connected with the second rotating rod.

[0010] Further, the sliding block top end is provided with a threaded hole, the sliding groove bottom end is fixedly connected with a first fixed plate, the first fixed plate top end is rotationally connected with a threaded rod, one end of the threaded rod penetrates through the sliding groove and is fixedly connected with a handle, and the threaded rod and the threaded hole are in threaded connection.

[0011] Further, the support plate rear end is provided with a driven gear, the driven gear is fixedly connected with a transmission rod on the side close to the support plate, a plurality of support blocks are fixedly connected with the support plate front end and located around the transmission rod, the support blocks front end is provided with a second roller assembly, one end of the transmission rod is rotationally connected between the support plate and the second rotation plate and the second rotation rod, the support plate rear end bottom is fixedly connected with a motor support plate, the motor support plate top end is fixedly connected with a servo motor, the servo motor output end is fixedly connected with a driving gear, and the driving gear and the driven gear are in chain transmission.

[0012] The utility model discloses a beneficial effect:

[0013] The utility model discloses in using, a kind of tensioning mechanism, by spring telescopic make it can extrude and hold the plastic film on gyro wheel, avoid in the process of tensioning, shift occurs, again by the limiting ring of first gyro wheel two sides, to prevent the plastic film on gyro wheel from falling off in the moving process, by handle driving threaded rod makes the second roller assembly on the sliding block up and down movement to adjust the tensioning degree of plastic film, then start servo motor drives the second roller of second roller assembly on support block rotates, and then drives plastic film to move forward. ACCURACY

[0014] In order to more clearly illustrate the technical scheme of the utility model, the following will be to the specific implementation mode description needed to use the drawing briefly introduced, obviously, the following description in the drawing only some embodiments of the utility model, for the person skilled in the art comes, without paying creative labor, according to these drawings, other drawings can also be obtained.

[0015] Figure 1 The right front perspective view of the utility model;

[0016] Figure 2 The tensioning structure schematic view of the utility model;

[0017] Figure 3 The left rear perspective view of the utility model;

[0018] Figure 4 The right view of the utility model;

[0019] Figure 5 The clamping gyro wheel assembly structure schematic view of the utility model.

[0020] Reference signs are as follows:

[0021] 1, bottom plate; 2, motor support plate; 3, servo motor; 4, driving gear; 5, driven gear; 6, chain; 7, transmission rod; 8, support block; 9, support plate; 10, sliding block; 11, sliding groove; 12, threaded rod; 13, sliding block; 14, threaded hole; 15, first fixed plate; 16, handlebar; 17, second fixed plate; 18, telescopic rod; 19, spring; 20, first rotating plate; 21, first rotating rod; 22, first roller; 23, limiting ring; 24, second rotating plate; 25, second rotating rod; 26, second roller; 27, fixed frame. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] As shown in Figures 1-5 , it relates to a tensioning mechanism, including bottom plate 1, the left and right ends of the top end of bottom plate 1 are provided with clamping roller assembly, bottom plate 1 rear end is fixedly connected with support plate 9, support plate 9 rear end is fixedly connected with sliding block 10 in the middle, support plate 9 front end is provided with sliding groove 11 in the middle, sliding groove 11 is slidably connected with sliding block 13, sliding block 13 front end is provided with second roller assembly, support plate 9 front end left side is fixedly connected with fixed frame 27, and fixed frame 27 front end is provided with second roller assembly.

[0024] As shown in Figures 1-5 , the clamping roller assembly includes the second fixed plate 17 fixedly connected with the left and right ends of the top end of the bottom plate 1, the second fixed plate 17 top end is fixedly connected with a plurality of telescopic rods 18, the second fixed plate 17 top end and the telescopic rod 18 around are fixedly connected with the spring 19, and the telescopic rod 18 output end is provided with the first roller assembly. The plastic film is clamped.

[0025] As shown in Figures 1-5 , the first roller assembly includes the first rotating plate 20 fixedly connected with the output end of the telescopic rod 18, the first rotating plate 20 is rotatably connected with the first rotating rod 21, the first rotating rod 21 is fixedly connected with the first roller 22, the first roller 22 both sides are provided with the limiting ring 23, and the plastic film is guided to move forward.

[0026] As shown in Figures 1-5As shown in the second roller assembly includes a second rotating plate 24 is arranged in the front end of the slider 13, the second rotating plate 24 is rotatably connected with the second rotating rod 25, the second rotating rod 25 is fixedly connected with the second roller 26, for guiding the plastic film to move forward.

[0027] As Figures 1-5 The top end of the slider 13 is provided with a threaded hole 14, the bottom end of the sliding groove 11 is fixedly connected with a first fixed plate 15, the top end of the first fixed plate 15 is rotatably connected with a threaded rod 12, one end of the threaded rod 12 penetrates through the sliding groove 11 and is fixedly connected with a handle 16, the threaded rod 12 is threadedly connected with the threaded hole 14, by moving the slider 13 up and down, the second roller assembly is moved up and down, the plastic film is tensioned.

[0028] As Figures 1-5 The rear end of the support plate 9 is provided with a driven gear 5, the driven gear 5 is fixedly connected with a transmission rod 7 near the side of the support plate 9, the front end of the support plate 9 and around the transmission rod 7 is fixedly connected with a plurality of support blocks 8, the support blocks 8 are provided with a second roller assembly at the front end, one end of the transmission rod 7 is rotatably connected between the support plate 9, the second rotating plate 24 and the second rotating rod 25, the rear end of the support plate 9 is fixedly connected with a motor support plate 2, the top end of the motor support plate 2 is fixedly connected with a servo motor 3, the output end of the servo motor 3 is fixedly connected with a driving gear 4, the driving gear 4 and the driven gear 5 are driven by a chain 6, and the device is provided with kinetic energy.

[0029] Working principle: in use, first check whether the device is intact, after the completion of the inspection, the plastic film is passed through the rollers, the spring 19 in the clamping roller assembly is stretched to clamp the plastic film, the plastic film is prevented from deviating during movement by the limiting ring 23 on the first roller 22, when the plastic film is loose on the roller, the handle 16 is rotated to drive the threaded rod 12 to rotate, and then the second roller assembly on the slider 13 is moved up and down, and the plastic film is tensioned, when the plastic film needs to move forward, the servo motor 3 is started to drive the driving gear 4 to rotate, the driving gear 4 drives the driven gear 5 to rotate through the chain 6, and then the second roller assembly on the support block 8 is rotated through the transmission rod 7, and then the plastic film is moved forward.

[0030] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific implementation. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents.

Claims

1. A tensioning mechanism comprising a base plate (1), characterised in that: The bottom plate (1) top end left and right ends are provided with clamping roller assembly, the bottom plate (1) rear end is fixedly connected with support plate (9), the support plate (9) rear end middle is fixedly connected with sliding groove block (10), the support plate (9) front end middle is provided with sliding slot (11), the sliding slot (11) is slidably connected with sliding block (13), the sliding block (13) front end is provided with second roller assembly, the support plate (9) front end left side is fixedly connected with fixed frame (27), the fixed frame (27) front end is provided with second roller assembly.

2. A tensioning mechanism according to claim 1, characterised in that: The clamping roller assembly includes the second fixed plate (17) fixedly connected with the bottom plate (1) top end left and right ends, the second fixed plate (17) top end is fixedly connected with a plurality of telescopic rods (18), the second fixed plate (17) top end and around telescopic rod (18) is fixedly connected with spring (19), the telescopic rod (18) output end is provided with first roller assembly.

3. A tensioning mechanism according to claim 2, wherein: The first roller assembly includes the first rotating plate (20) fixedly connected with the telescopic rod (18) output end, the first rotating plate (20) is rotatably connected with the first rotating rod (21), the first rotating rod (21) is fixedly connected with the first roller (22), and the first roller (22) is provided with the limiting ring (23) on both sides.

4. A tensioning mechanism according to claim 1, characterized in that: The second roller assembly includes the second rotating plate (24) provided at the front end of the sliding block (13), the second rotating plate (24) is rotatably connected with the second rotating rod (25), and the second rotating rod (25) is fixedly connected with the second roller (26).

5. A tensioning mechanism according to claim 1, characterized in that: The sliding block (13) top end is provided with threaded hole (14), the sliding slot (11) bottom end is fixedly connected with first fixed plate (15), the first fixed plate (15) top end is rotatably connected with threaded rod (12), one end of threaded rod (12) penetrates through sliding slot (11) and is fixedly connected with handle (16), and threaded rod (12) and threaded hole (14) are screw connected.

6. A tensioning mechanism according to claim 4, wherein: The support plate (9) rear end is provided with driven gear (5), the driven gear (5) is fixedly connected with transmission rod (7) on the side close to support plate (9), a plurality of support blocks (8) are fixedly connected with support plate (9) front end and around transmission rod (7), the support block (8) front end is provided with second roller assembly, one end of transmission rod (7) penetrates through support plate (9) and is rotatably connected between second rotating plate (24) and second rotating rod (25), the support plate (9) rear end bottom is fixedly connected with motor support plate (2), the motor support plate (2) top end is fixedly connected with servo motor (3), the output end of servo motor (3) is fixedly connected with driving gear (4), and the driving gear (4) and driven gear (5) are driven by chain (6).

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