Single-roller type constant tension bracket

Abstract

The utility model relates to a single roller type constant tension bracket, which belongs to the technical field of cloth inspecting machines, and comprises two box bodies, a set of synchronous chain wheel device and a set of single tension roller component, the two box bodies are transversely arranged at an interval, the synchronous chain wheel device comprises two sets of chain wheel components and a synchronous shaft, the two sets of chain wheel components are respectively arranged on the opposite surfaces of the two box bodies, each set of chain wheel assembly comprises an upper chain wheel, a lower chain wheel and a chain, the synchronizing shaft is horizontally arranged between the two box bodies, and the lower chain wheels of the two sets of chain wheel assemblies are fixedly connected to the synchronizing shaft; the single tension roller assembly comprises a tension roller and two roller seats rotationally arranged at the two ends of the tension roller, the tension roller is horizontally and transversely arranged between the two box bodies above the synchronizing shaft, the two roller seats penetrate through longitudinal long holes in the two box bodies respectively and then are connected with the same sides of upper chain wheels of the two chains, and balancing weights are arranged on the other sides of the upper chain wheels of the two chains. The cloth cover stretching device is favorable for improving the cloth cover stretching consistency, the cloth cover uniformity and the operation stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cloth inspecting machine, in particular to a single roller type constant tension frame. BACKGROUND

[0002] The cloth inspecting machine is usually provided with a tension frame for adjusting the tension and uniformity of cloth surface, and the traditional tension frame is composed of a tension roller and a swing arm mechanism movably connecting the two ends of the tension roller to the frame. When working, the cloth around the bottom of the tension roller will drive the tension roller to swing in an arc. Since the gravity of the tension roller is different at different positions of the arc (the gravity is the largest at the top of the arc, and the gravity will decrease after deviating from the top of the arc), the gravity acting on different parts of the cloth passing through the tension roller is also different, resulting in inconsistent stretching degree of different parts of the cloth, thereby affecting the uniformity, running stability, subsequent cloth inspection and cloth winding effect of the cloth. SUMMARY

[0003] The utility model aims at improving the above-mentioned deficiencies of the existing tension frame of the cloth inspecting machine.

[0004] The utility model adopts the following technical scheme:

[0005] The single roller type constant tension frame comprises two boxes, a set of synchronous sprocket devices and a single tension roller assembly. The two boxes are transversely arranged at a distance and fixedly connected to each other as a whole. The synchronous sprocket device comprises two sets of sprocket assemblies and a synchronous shaft. Each set of sprocket assembly is symmetrically arranged on the opposite inner walls of the two boxes and comprises an upper sprocket and a lower sprocket arranged on the inner side walls of the boxes at a distance and a chain connecting the upper sprocket and the lower sprocket. The synchronous shaft is horizontally arranged between the two boxes and rotatably arranged at the opposite faces of the two boxes at both ends. The lower sprockets of the two sets of sprocket assemblies are fixedly connected to the synchronous shaft. The single tension roller assembly comprises a tension roller and two roller seats rotatably arranged at both ends of the tension roller. The tension roller is horizontally arranged between the two boxes above the synchronous shaft. The two roller seats are connected to the same side of the upper sprockets of the two chains after passing through the corresponding longitudinal holes in the opposite faces of the two boxes. The other sides of the upper sprockets of the two chains are symmetrically provided with counterweights for adjusting the gravity of the single tension roller assembly. The sum of the gravity of all counterweights, the friction generated by the synchronous sprocket device and the friction generated by the single tension roller assembly is less than the gravity of the single tension roller assembly. The difference in gravity obtained by the single tension roller assembly is less than the tension of the cloth.

[0006] As a preferred scheme, the single tension roller assembly further comprises two sliding blocks fixedly connected to the two roller seats and slidingly arranged in the longitudinal holes of the two boxes.

[0007] As a preferred solution, the slider is T-shaped and comprises a square plate body, a linear slide rail centrally protruding from one side of the square plate body, and a rectangular through hole penetrating the square plate body and the linear slide rail, the square plate body is attached to the inner side wall of the box, and the linear slide rail is slidably arranged in the longitudinal long hole.

[0008] As a preferred solution, the roller seat is a rectangular strip and is fixedly inserted into the rectangular through hole on the slider, the roller seat is rotationally connected with the tension roller through the shaft hole on the inner end surface thereof, and the corresponding two sides of the chain are clamped by the U-shaped opening on the outer end portion of the roller seat, the outer end of the roller seat is further provided with a pin hole intersecting the U-shaped opening, a pin is arranged in the pin hole, and the pin connects the roller seat to the chain after stringing a chain link of the chain.

[0009] As a preferred solution, the counterweight is cylindrical, the side portion is provided with a clamping groove penetrating the center of the cylinder, the outer wall and the two end surfaces, the two side groove walls of the clamping groove are correspondingly provided with grooves, the counterweight clamps the outer chain plates on the two sides of the chain through the clamping groove thereof, and is fixed to the two ends of a chain shaft of the chain through the grooves.

[0010] As a preferred solution, the longitudinal long hole is arranged between the upper sprocket and the lower sprocket.

[0011] As a preferred solution, a first cloth guide roller and a second cloth guide roller are further horizontally arranged between the two boxes, the first cloth guide roller is arranged on the cloth outlet side of the tension roller, the second cloth guide roller is arranged on the cloth inlet side of the tension roller, the first cloth guide roller and the second cloth guide roller are arranged at a position higher than the length midpoint of the longitudinal long hole and are rotationally arranged on the opposite faces of the two boxes.

[0012] As a preferred solution, the first cloth guide roller is connected with a driving motor, and any one end of the synchronous shaft is connected with a speed regulating potentiometer.

[0013] The tension roller of the utility model can only move up and down in the vertical direction, so that the gravity is always constant, the gravity (tension) on the cloth surface passing through the bottom of the tension roller is always consistent, and the consistency of cloth surface stretching, the uniformity of cloth surface, the stability of cloth surface running and the subsequent cloth inspection and cloth winding effects are improved. In addition, the tension can be adjusted by the counterweight, and the utility model is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a general structure schematic view of the embodiment of the utility model

[0015] Figure 2 It is one of the single roller tension assembly connection structure schematic views of the embodiment of the utility model

[0016] Figure 3 It is the second single roller tension assembly connection structure schematic view of the embodiment of the utility model

[0017] Figure 4A schematic diagram of a sliding block structure of an embodiment of the present utility model

[0018] Figure 5 A schematic diagram of a roller seat structure of an embodiment of the present utility model

[0019] Figure 6 A schematic diagram of cloth threading of an embodiment of the present utility model Specific embodiments

[0020] The present utility model will be described below in combination with the drawings and specific embodiments.

[0021] As Figures 1-5 The single-roller constant tension frame shown in the figure comprises two box bodies 1, a set of synchronous sprocket devices 2 and a set of single-tension roller assemblies 3.

[0022] Both of the box bodies 1 are rectangular box bodies and are laterally spaced apart on opposite sides, and the bottoms thereof are fixedly connected to each other as a whole through connecting rods.

[0023] The synchronous sprocket device 2 comprises two sets of sprocket assemblies 2.1 and a synchronous shaft 2.2, the two sets of sprocket assemblies 2.1 are symmetrically arranged on the inner walls of the opposite sides of the two box bodies 1, each set of sprocket assemblies 2.1 comprises an upper sprocket 2.11 and a lower sprocket 2.12 which are spaced apart on the inner wall of the box body 1 and a chain 2.13 which connects the upper sprocket 2.11 and the lower sprocket 2.12, the synchronous shaft 2.2 is horizontally arranged between the two box bodies 1 and rotatably arranged on the opposite sides of the two box bodies 1 at both ends, and the lower sprocket 2.12 of each set of sprocket assemblies 2.1 is fixedly connected to the synchronous shaft 2.2.

[0024] The single-tension roller assembly 3 comprises a tension roller 3.1 and two roller seats 3.2 which are rotatably arranged at both ends of the tension roller 3.1, the tension roller 3.1 is horizontally arranged between the two box bodies 1 above the synchronous shaft 2.2, the two roller seats 3.2 are connected to the same side of the upper sprocket 2.11 of the two chains 2.13 after passing through the corresponding longitudinal long holes 1.1 arranged on the opposite sides of the two box bodies 1, and the longitudinal long holes 1.1 are arranged between the upper sprocket 2.11 and the lower sprocket 2.12.

[0025] The single-tension roller assembly 3 further comprises two sliding blocks 3.3 which are fixedly connected to the two roller seats 3.2 and slidably arranged in the longitudinal long holes 1.1 of the two box bodies 1.

[0026] The sliding block 3.3 is T-shaped and comprises a square plate body 3.31, a straight sliding rail 3.32 which is centrally protrudingly arranged on one side of the square plate body 3.31 and a rectangular through hole 3.33 which penetrates through the square plate body 3.31 and the straight sliding rail 3.32, the square plate body 3.31 is attached to the inner wall of the box body 1, and the straight sliding rail 3.32 is slidably arranged in the longitudinal long hole 1.1.

[0027] The roller seat 3.2 is a rectangular bar and is inserted into a rectangular through hole 3.33 fixed on the slider 3.3. The roller seat 3.2 is rotatably connected to the tension roller 3.1 through the shaft hole provided on its inner end face, and clamps the corresponding two sides of the chain 2.13 through the U-shaped opening 3.21 provided on its outer end. The outer end of the roller seat 3.2 is also provided with a pin hole that crosses through the U-shaped opening 3.21. A pin 3.4 is provided in the pin hole. After the pin 3.4 is connected to one link of the chain 2.13, the roller seat 3.2 is connected to the chain 2.13.

[0028] On the other side of the upper sprockets 2.11 of the two chains 2.13, there are symmetrical counterweights 4 for adjusting the gravity of the single tension roller assembly 3. The counterweights 4 are cylindrical, and their sides are provided with clamping grooves 4.1 that penetrate through their core, outer wall and two end faces. The two sides of the clamping grooves 4.1 are provided with grooves 4.11. The counterweights 4 clamp the outer chain plates on both sides of the chain 2.13 through their clamping grooves 4.1, and are fixed to both ends of one chain shaft of the chain 2.13 through their grooves 4.11.

[0029] The sum of the weight of all counterweights 4, the friction generated by the synchronous sprocket device 2, and the friction generated by the single tension roller assembly 3 is less than the weight of the single tension roller assembly 3, so that the tension roller 3.1 can fall freely onto the fabric surface below it by the obtained gravity difference; the gravity difference obtained by the single tension roller assembly 3 is less than the tension of the fabric surface, so that the tension roller 3.1 will not break free from the constraint of the fabric surface tension and fall freely to the bottom of the longitudinal long hole 1.1 and fail.

[0030] A first guide roller 5 and a second guide roller 6 are horizontally arranged between the two boxes 1. The first guide roller 5 is located on the fabric outlet side of the tension roller 3.1, and the second guide roller 6 is located on the fabric inlet side of the tension roller 3.1. Both the first guide roller 5 and the second guide roller 6 are located at a position higher than the midpoint of the length of the longitudinal long hole 1.1, and both ends are rotatably located on the opposite surfaces of the two boxes 1.

[0031] The first guide roller 5 is connected to a drive motor, and a speed regulating potentiometer 8 for controlling the speed of the drive motor is connected to either end of the synchronous shaft 2.2. The speed regulating potentiometer 8 is fixedly installed on the housing 1 and connected to the synchronous shaft 2.2 through the gear transmission mechanism 7.

[0032] like Figure 6 As shown, in use, the fabric 9 is passed sequentially over the second guide roller 6, below the tension roller 3.1, and over the first guide roller 5, ensuring that the tension of the fabric surface is greater than the gravitational difference obtained by the single tension roller assembly 3, so that the fabric 9 suspends and supports the tension roller 3.1. The fabric surface tension can be adjusted by measuring the resistance value of the synchronous shaft 2.2 using the speed regulating potentiometer 8 to adjust the speed of the drive motor. The tension can be adjusted by changing the weight of the counterweight 4 according to the different fabrics 9.

[0033] In operation, the cloth 9 can drive the tension roller 3.1 to rotate and move up and down, the tension roller 3.1 is limited by the synchronous chain wheel mechanism 2, and the two ends always move up and down synchronously, so that the gravity is always constant, thereby uniformly and smoothly stretching the passing cloth 9.

Claims

1. Single roll constant tension stand, characterized in that: The utility model provides a single tension roller assembly, including two box (1), a set of synchronous sprocket device (2) and a set of single tension roller assembly (3), two box (1) transverse apart and fixedly connected as a whole, synchronous sprocket device (2) includes two sets of sprocket assembly (2.1) and a synchronous shaft (2.2), two sets of sprocket assembly (2.1) are symmetrically arranged on the opposite inner wall of two box (1), and each sprocket assembly (2.1) includes upper chain wheel (2.11) and lower chain wheel (2.12) that are apart from each other and are arranged on the inner wall of box (1) and chain (2.13) that is connected with upper chain wheel (2.11) and lower chain wheel (2.12), and synchronous shaft (2.2) is horizontally arranged between two box (1) and is rotatably arranged on the opposite surface of two box (1) at both ends, and the lower chain wheel (2.12) of two sets of sprocket assembly (2.1) is fixedly connected with the synchronous shaft (2.2); Single tension roller assembly (3) includes a tension roller (3.1) and two roller seats (3.2) rotatably arranged at both ends of the tension roller (3.1), the tension roller (3.1) is horizontally arranged between two box (1) above the synchronous shaft (2.2), two roller seats (3.2) are connected with the upper chain wheel (2.11) on the same side of two chains (2.13) after passing through the corresponding longitudinal long hole (1.1) on the opposite surface of two box (1), and the other side of the upper chain wheel (2.11) of two chains (2.13) is symmetrically provided with a counterweight (4) for adjusting the gravity of single tension roller assembly (3), the sum of the gravity of all counterweights (4) and the friction generated by synchronous sprocket device (2) and the friction generated by single tension roller assembly (3) is less than the gravity of single tension roller assembly (3), and the gravity difference obtained by single tension roller assembly (3) is less than the tension of the cloth.

2. The single roll constant tension stand of claim 1, wherein: Single tension roller assembly (3) further includes two sliding blocks (3.3), and the two sliding blocks (3.3) are fixedly connected with the two roller seats (3.2) and slidably arranged in the longitudinal long hole (1.1) on two box (1).

3. The single roll constant tension stand of claim 2, wherein: The sliding block (3.3) is T-shaped and includes a square plate body (3.31), a straight line sliding rail (3.32) centrally protruding from one side of the square plate body (3.31), and a rectangular through hole (3.33) penetrating through the square plate body (3.31) and the straight line sliding rail (3.32), the square plate body (3.31) is attached to the inner wall of the box (1), and the straight line sliding rail (3.32) is slidably arranged in the longitudinal long hole (1.1).

4. The single roll constant tension stand of claim 3, wherein: The roller seat (3.2) is a long strip and is inserted and fixed in the rectangular through hole (3.33) on the sliding block (3.3), the roller seat (3.2) is rotatably connected with the tension roller (3.1) through the shaft hole provided on the inner end face thereof, clamps the corresponding two sides of the chain (2.13) through the U-shaped opening (3.21) provided on the outer end portion thereof, and the outer end of the roller seat (3.2) is further provided with a pin hole intersecting the U-shaped opening (3.21), a latch (3.4) is arranged in the pin hole, the latch (3.4) connects the roller seat (3.2) with the chain (2.13) after stringing a chain link of the chain (2.13).

5. The single roll constant tension stand of claim 1, wherein: The counterweight (4) is in a cylindrical shape, and a clamping groove (4.1) is arranged through the center, the outer wall and the two end faces of the counterweight (4), and the two side walls of the clamping groove (4.1) are correspondingly provided with a groove (4.11), the counterweight (4) clamps the outer chain plates on both sides of the chain (2.13) through the clamping groove (4.1) and is fixed to the two ends of a chain shaft of the chain (2.13) through the groove (4.11).

6. The single roll constant tension stand of claim 1, wherein: The longitudinal long hole (1.1) is arranged between the upper chain wheel (2.11) and the lower chain wheel (2.12).

7. The single roll constant tension stand of claim 1, wherein: The two box bodies (1) are also horizontally provided with a first cloth guide roller (5) and a second cloth guide roller (6), the first cloth guide roller (5) is arranged on the cloth outlet side of the tension roller (3.1), the second cloth guide roller (6) is arranged on the cloth inlet side of the tension roller (3.1), the first cloth guide roller (5) and the second cloth guide roller (6) are both arranged at a position higher than the middle point of the length of the longitudinal long hole (1.1) and the two ends are respectively rotatably arranged on the opposite faces of the two box bodies (1).

8. The single roll constant tension stand of claim 7, wherein: The first cloth guide roller (5) is connected with a driving motor, and the synchronous shaft (2.2) is connected with a speed regulating potentiometer (8).

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