JPH0219230Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a grain straightening machine to be attached to a fabric stretching machine, cloth feeding device, etc. for a printing table. More specifically, the present invention uses a pair of pin wheels that are arranged in a widening direction and can freely rotate independently of each other to pin the edges of both sides of the running cloth, thereby reducing the diagonal strain of the weft grain in the cloth. This invention relates to a grain straightening machine for straightening.

Conventionally, as seen in, for example, Japanese Utility Model Application No. 55-15056, a pair of pin wheels that can freely rotate independently of each other are arranged in the width direction of the cloth along both side edges of the running cloth. By pinning the ends of both sides of the cloth with a group of pins protruding from the outer periphery,
A grain straightening machine is known in which the diagonal strain of the weft grain in the cloth is corrected by the difference in rotational speed between both pin wheels, and therefore by the difference in the overfeed rate of the cloth.

Furthermore, as an example of a significantly improved pinwheel operating mechanism, Japanese Utility Model Application No. 58-4700 discloses a pair of pinwheel stands disposed in the width direction of the cloth along the edges of both sides of the running cloth; A rotatable pin wheel is attached to each pin wheel stand so that the angle can be changed around the tangent line at the pinning start position on the outer periphery or a line near it.The degree of spread at the end of the pin wheel is set by adjusting the inclination angle of each pin wheel. A grain straightening machine is shown that is equipped with an inclination angle adjusting means. In this example, no matter how the inclination angle of each pinwheel is adjusted, the pinning start position of the fabric at its outer periphery is substantially not displaced. There is no need to change the cloth or adjust the position of brush rolls or other attached equipment when resetting the degree of spread at the end of the wheel. In addition, since each pinwheel is supported by each pinwheel stand, it is possible to easily adopt a mechanism that moves each pinwheel along with the pinwheel stand in the width direction of the fabric, and it is possible to adjust the width of the fabric to be straightened. It is also possible to easily adjust the distance between the two pinwheels and to introduce an automatic tracking system for each pinwheel to each edge of the running cloth.

However, in conventional pinwheel-type grain straightening machines, including the above-mentioned improved example, the running fabric is subjected to abnormal tension in the width direction of the fabric when pinning by a pair of pinwheels arranged to spread out. Sometimes no means of relieving this tension is included, leading to fabric deformation or breakage; otherwise, the device must be stopped before such deformation or breakage occurs, and the pin removed. It was necessary to perform operations such as reducing the degree of spread at the end of the wheel. The purpose of this invention is to create a fabric that protects the fabric from deformation and breakage by automatically reducing the degree of spread at the end of the pin wheel when the running fabric is subjected to a predetermined tension or more in the width direction of the fabric during pinning. Our goal is to provide straightening machines.

That is, in the texture straightening machine according to the present invention, which is equipped with a pinwheel stand, a pinwheel, and an inclination angle adjusting means as described above, each pinwheel whose inclination angle has been adjusted is adjusted to the extent of the pinwheel end spread. It is characterized in that it is mounted on a pinwheel stand so that the angle can be changed in the direction of reducing the degree of spread at the end of the pinwheel via a spring mechanism that applies pressure in the direction of expansion of the pinwheel.

In the above, each pinwheel stand is slid and screwed onto each guide shaft and each feed screw shaft arranged in the cloth width direction, and is moved in the cloth width direction by forward and reverse rotation of each feed screw shaft. If possible, it would be possible to not only adjust the interval between both pinwheels according to the cloth width, but also automatically follow each pinwheel to each edge of the running cloth while maintaining the pinwheel end spread as specified. The system can be easily adopted.

Although there is no particular restriction on the mechanism for adjusting the inclination angle of each pinwheel, for example, an arm that rotatably supports each pinwheel may be connected to an angle-changing shaft located on the above-mentioned tangent to the outer periphery, and the angle may be varied. A shaft is rotatably mounted on a pin wheel stand, a worm wheel is attached to the angle changing shaft, a worm is meshed with the worm wheel, and the worm is mounted on the pin wheel stand so that its rotation angle can be adjusted. In this case, by adjusting the rotation angle of the worm, it is possible to change the angle of the pin wheel via the worm wheel and adjust the degree of spread of the pin wheel to a predetermined degree. In addition, a common worm shaft is attached to each worm so that it can slide freely and rotate in conjunction with each other in the cloth width direction, and by rotating the worm shaft forward and backward, each pin wheel can be moved in opposite directions with the same amount of displacement. If the pinwheel is configured to be angular, each pinwheel can always be angled symmetrically, and when each pinwheel base is moved in the cloth width direction, each worm will also move along the worm axis. This is preferable because it can be slid.

Further, in the present invention, there is no particular limitation on the cloth tension relaxation mechanism using a spring mechanism. usually,
During pinning, which involves widening the running cloth, each pinwheel is constantly pressurized in the direction of reducing the degree of spread at the end of the pinwheel due to the tension in the width direction of the cloth. The pinwheel is always pressurized in the direction of expanding the degree of spread at the end of the pinwheel, and when the tension of the cloth is within a predetermined value, the initial elasticity of the spring mechanism is greater.
The degree of spread of the pinwheel at its end does not change and is maintained at a predetermined angle. However, when the tension in the fabric increases beyond a predetermined value and exceeds the initial elasticity of the spring mechanism, the spring mechanism contracts or stretches until it develops an elasticity that balances the tension in the fabric, and at the same time each pinwheel also The angle is changed according to the degree of contraction or expansion to reduce the degree of spread at the end of the pinwheel, effectively preventing an abnormal increase in the tension of the cloth. Note that the elasticity of the spring mechanism is preferably adjustable depending on the type of cloth and other circumstances.

For example, when the above-mentioned worm/worm wheel mechanism is adopted as the fabric tension relaxation mechanism, each pinwheel is angled in the direction of reducing the extent of pinwheel end spread after adjusting the rotation angle of the worm. In some cases, a configuration may be adopted in which the worm is mounted on a pinwheel stand so that it can be displaced in the axial direction of the worm against the elasticity of a spring mechanism. In this case, the worm is fixed so that it cannot rotate after its rotation angle is adjusted, and can be displaced only in the axial direction so that it can move back and forth against the elasticity of the spring mechanism. This involves movement of the worm in the axial direction through rotation of the worm wheel.

In addition, as a modification of the above, the worm rotates against the elasticity of the spring mechanism when each pinwheel changes its angle in the direction of reducing the degree of spread at the end of the pinwheel after adjusting the rotation angle, and the rotation angle changes. It is also possible to adopt a configuration in which the pinwheel is mounted on a pinwheel stand so as to change the angle. In this case, the worm is fixed via the spring mechanism after adjusting its rotation angle, and is able to rotate in a reciprocating manner against the elasticity of the spring mechanism, and is prevented from displacing in the axial direction. The angle change of each pin wheel is accompanied by the rotation of the worm through the rotation of the worm wheel.

Next, the present invention will be explained based on the drawings. Fig. 1 is a front view of a pinwheel mechanism in an embodiment of the invention, Fig. 2 is an enlarged cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a view similar to that shown in Fig. 1. The - line cross section in is an enlarged longitudinal cross-sectional view passing through the worm at right angles, and between the left and right fixed frames 1, there are left and right feed screw shafts 3, which can be rotated individually via an intermediate fixed piece 2.
3. Parallel 2 that is pivoted or loosely penetrated by the intermediate fixed piece 2
A worm shaft 6 which is pivoted or loosely passed through the book guide shafts 4 and 5 and the intermediate fixed piece 2 and whose rotation angle is adjustable.
are each bridged, and the pinwheel stand 7,
7 are installed on the left and right in a screwed state with the feed screw shafts 3, 3 and slidably on the guide shafts 4, 5.

Note that, since the left and right pinwheel mechanisms in this embodiment have the same configuration, one of the pinwheel mechanisms will be described below regarding the inside of the pinwheel mechanism.

A pinwheel swing shaft 8 is mounted on the pinwheel stand 7 via bearings 9 and 10, and a worm wheel 11 is mounted in the middle of the pinwheel swing shaft 8.
However, a bifurcated arm 13 that rotatably supports the pin wheel 12 is attached to each end thereof. At this time, the extension axis of the pinwheel swing shaft 8 is adjusted so as to be tangent to the outer peripheral portion 14 of the pinwheel 12 at the pinning start position P. Note that even if the above-mentioned extension axis is a line near the above-mentioned tangent line, it is substantially not affected by the adjustment of the inclination angle of the pinwheel 12. It is preferable that such a neighborhood line is parallel to the tangent line and close to an interval within the range of the length of the group of pins 15 protruding from the outer circumference 14 of the pin wheel 12.

A worm 16 is meshed with the worm wheel 11, and the worm 16 is fitted into the worm shaft 6 so as to be slidable in the axial direction and rotatable in conjunction with the worm shaft 6. It is attached to the pinwheel stand 7 via a compression coil spring 17 extending therethrough. Also,
An adjustment bolt 18 is screwed into the pinwheel base 7 so as to loosely pass through the worm shaft 6, and its end abuts against the compression coil spring 17 via a bearing 19, and the elasticity of the compression coil spring can be adjusted by twisting the bolt. is possible.

In the above configuration, when adjusting the inclination angle of the pin wheel 12, the worm shaft 6 is adjusted as necessary by rotating a handle (not shown) connected to one end of the worm shaft 6 via a gear mechanism (not shown). The rotation is sequentially transmitted to the worm 16, worm wheel 11, pin wheel swing shaft 8, and arm 13, and the pin wheel 12 is rotated around the pin wheel swing shaft 8. change the angle. At this time, the left and right pin wheels 12, 12 are simultaneously deflected by the same amount of deflection in opposite directions by the above-mentioned handle operation.

When moving the pinwheel 12 in the cloth width direction, the feed screw shaft 3 screwed onto the pinwheel base 7 is connected to a gear mechanism (not shown) at one end thereof.
It is sufficient to rotate it by the required amount in the required direction by operating a handle or a motor (both not shown) connected via the .

Further, in the above configuration, when the left and right pin wheels 12, 12 are pressed in the direction of reducing the degree of spread at the end of the pin wheels by a tension in the width direction of the running cloth, the worm 16 At the same time as the compression coil spring 17 is displaced in the contraction direction, the left and right pin wheels 12, 12 are deformed in the direction of reducing the degree of spread at the end of the pin wheels, thereby protecting the running cloth from deformation and breakage.

Next, FIG. 4 is a side view of the main parts of the embodiment of the present invention, in which the cloth 20 includes an expander roll 21, a centering roll 22, an edge detector 23, feed rolls 24 and 25, a dancer roll 26, an edge edge The paper passes through detectors 27, 27, brush rolls 28, 28, pin wheels 12, 12, bar expander 29, etc. in this order, and is fed to, for example, an endless belt (not shown) of an autoscreen textile printing apparatus.

In the above configuration, the cloth 20 is widened by the expander roll 21, and its edge is detected by the edge detector 23, and the edge is detected by the centering roll 22.
The running will be corrected. The dancer roll 26 is oscillatedly displaced according to the difference between the feed amount of the cloth 20 by the feed rolls 24 and 25 and the amount of pull out by the pin wheels 12 and 12, and the dancer roll 26 is oscillated to move the cloth 20 to the pin wheels 12 and 12 with a constant low tension. supply to.

Further, the cloth 20 is attached to the left and right pin wheels 12,1.
While being pressed by the brush rolls 28, 28 brought into contact with each other at the pinning start position of 2, the material is fed to the pin wheels 12, 12, and is sequentially pinned in an overfeed state by a group of pins 15, and after the grain is straightened, It is expanded in width by the bar expander 29 and pulled out of the system. Further, the pin wheels 12, 12 can be moved individually in the cloth width direction, and edge edge detectors 27, 2 are attached to interlock with these pin wheels 12, 12.
7 to detect each selvage end of the cloth 20, and cause each pinwheel 12, 12 to automatically follow each selvage end.
This enables reliable grain correction accompanied by a widening effect.

In the above, the brush rolls 28, 28 are
The pinwheel 1 is rotated by the running of the pinwheel 1.
The overfeed state of the cloth 20 to the cloths 2 and 12 is more effectively maintained and promoted, and more excellent grain correction is possible. Further, the brush rolls 28, 28 described above have a circular cross-sectional periphery, but as shown in the cross-sectional views of FIGS. 5A and 5B, for example,
Square wave shapes, triangular wave shapes, and other wave shapes made of peaks and valleys formed by brushes with long and short cross-sectional circumferences can provide a more stable overfeed state to the pin wheel and more effective grain correction. Note that the brush roll can also be actively rotated by power.

[Brief explanation of the drawing]

Figures 1 and 2 are a front view and an enlarged sectional view taken along the - line of the pinwheel mechanism according to an embodiment of the present invention, and Figure 3 is an enlarged longitudinal section passing through the worm at right angles to the - line cross section in Figure 1. Figure 4 is a side view of the main part of the embodiment of the present invention, and Figure 5A,
B is a sectional view of a brush roll that can be used in the present invention. 1...Fixed frame, 3...Feed screw shaft, 6...
... Worm shaft, 7 ... Pin wheel stand, 8 ... Pin wheel swing axis, 11 ... Worm wheel,
12...pin wheel, 16...worm, 17
... Compression coil spring, 18 ... Adjustment bolt, 20 ... Cloth, 27 ... Ear end detector, 28 ...
brush roll.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of pinwheel stands arranged in the width direction of the fabric along both edge ends of the running fabric, and a tangent to each pinwheel stand at or near the pinning start position of the outer periphery. A grain straightening machine is equipped with a rotatable pinwheel mounted so as to be able to change its angle around a line, and an inclination angle adjustment means that adjusts the inclination angle of each pinwheel to set the degree of spread at the end of the pinwheel. A grain straightening machine characterized in that each adjusted pinwheel is mounted on a pinwheel stand so that the angle can be changed in the direction of reducing the degree of end spread of the pin wheels via a spring mechanism that applies pressure in the direction of increasing the degree of end spread of the pin wheels. 2. The grain straightening machine according to claim 1, wherein each pin wheel base is slidably and threadably engaged with a guide shaft and a feed screw shaft arranged in the width direction of the cloth. 3. An arm that rotatably supports each pinwheel is rotatably mounted on a pinwheel stand via a variable-angle shaft placed on a tangent to the outer circumference or a line in the vicinity thereof, and a worm wheel is attached to the variable-angle shaft. A utility model according to claim 1, which comprises a worm wheel meshing with a worm, the worm being slidably and interlockingly attached to a worm shaft and pressurized in the axial direction by a spring mechanism. Texture straightening machine. 4. The grain straightening machine according to claim 3, wherein the spring mechanism is a compression coil spring. 5 Utility model registration in which each worm is attached to a common worm shaft arranged in the cloth width direction, and each pin wheel is deflected by the same amount in opposite directions by rotating the worm shaft in forward and reverse directions. A grain straightening machine according to claim 3. 6. The grain straightening machine according to claim 1, 3, or 4, wherein the elasticity of the spring mechanism is adjustable.