JPH05222667A - Production of woven fabric of wide angle and device therefor - Google Patents

Abstract

PURPOSE:To inexpensively produce woven fabric of wide angle by simple facilities by providing fabric for general purpose such as plain weave comprising warp and weft crossing at right angles with difference in speed at longitudinal positions in the longitudinal direction to apply tension to the fabric. CONSTITUTION:Fabric wound in a roll state, such as plain weave comprising warp and weft crossing at 90 degree, is continuously drawn out through a feeder and transported while being coated with a liquid sizing agent by a coater. The transportation speed at the upper stream side is made relatively higher than that at the downstream side at both the sides of the coater in the transportation direction through a tension control device, the fabric is provided with tension and width of the fabric is reduced to make the crossing angle of the warp and the weft larger than 90 degrees. By successively using a tenter, the liquid sizing agent applied to the fabric is dried in a controlled state of the reduced width and the fabric is conducted to a cooler, cooled and wound to give fabric of wide angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a wide-angle woven cloth for use as a canvas loaded in a rubber belt in a laminated manner. The wide-angle woven fabric means a woven fabric in which the warp and the weft intersect at an angle larger than 90 °.

[0002]

2. Description of the Related Art In order to improve the flexibility of a rubber belt, the above-mentioned rubber belt canvas has a wide cross-angle (usually 100 to 120) as shown in FIG.
Woven fabric A ′ of about (°) is generally used.

Conventionally, as a method for producing a wide-angle woven fabric of this type, as described in Japanese Patent Publication No. Sho 49-12153, a woven fabric A in which a warp A1 and a weft A2 intersect at 90 ° (FIG. 4).
While carrying the yarn in parallel with the warp yarn A1, the direction of the weft yarn A2 is changed from the middle while changing the direction of the warp yarn A1 by a predetermined angle, so that the crossing angle of the warp yarn A1 and the weft yarn A2 is 90 degrees.
There has been proposed a method of adhering the intersecting portions of both yarns by heat treatment or resin treatment at an angle (wide angle) larger than °.

Further, as an apparatus for producing a wide-angle woven cloth by the same production method, Japanese Patent Publication Nos. 51-42239, 53-37464 and 57-4865 are available.
The device described in Japanese Patent No. 9 has been proposed.

[0005]

The above-mentioned conventional manufacturing method is very advantageous in that a wide-angle woven cloth can be manufactured from a woven cloth such as a plain weave and a twill weave in which warps and wefts intersect at right angles.
On the other hand, it is necessary to change only the direction of the warp while holding many wefts during the process of conveying the woven fabric so that their directions do not change. There is a problem that the size is increased to require a large installation space and the equipment cost is increased.

The present invention has been made in view of the above points, and a wide-angle woven fabric can be produced from a woven fabric (raw fabric) such as a plain weave in which warp and weft intersect at right angles, and moreover, compared with the above-mentioned conventional production apparatus. Structure is simplified, equipment costs are lower,
It is an object of the present invention to provide a method and an apparatus for manufacturing a wide-angle woven cloth that requires a small installation space.

[0007]

In order to achieve the above-mentioned object, the manufacturing method of the present invention comprises: a) 90 warp yarns and weft yarns.
Deliver the woven cloth intersecting at 0 ° and convey the woven cloth while applying liquid glue such as rubber glue to the woven cloth, and b).
The transport speed of the woven fabric on the downstream side in the transport direction with the coating step sandwiched therebetween is made relatively higher than the transport speed on the upstream side, and tension is applied to the woven fabric in the transport direction, By making the width narrower than the width of the woven cloth at the feeding position, the crossing angle of the weft threads with respect to the warp threads is made larger than 90 °, and then the c) the woven cloth is restricted to the narrowed width, and the liquid paste is applied. Is dried, cooled and wound up.

In order to carry out the above-mentioned manufacturing method, the manufacturing apparatus of the present invention comprises: A) a feeding device for feeding a woven fabric wound into a roll and having warps and wefts intersecting at 90 °, B).
A transport device for transporting the woven fabric fed from the feeding device at a predetermined speed, C) a coating device for dipping or applying liquid glue such as rubber glue on the woven fabric in the middle of transport, and D) this coating. A tension control device which is installed on the upstream side of the device and which controls the conveying speed of the woven fabric to a speed relatively slower than that of the conveying device and applies an arbitrary tension to the woven fabric; It has a tenter that holds both sides of the woven fabric within a width that is narrowed by applying a tension, and a drying device that dries the liquid paste by transporting the tenter together with the tenter.

[0009]

According to the manufacturing method of the present invention having the above-mentioned structure, the woven cloth in which the warp and the weft intersect at right angles (see FIG. 4) has a crossing angle of more than 90 ° (for example, 120 °).
°) When manufacturing a wide-angle woven fabric (see Fig. 5), a woven fabric in which the warp and the weft are orthogonal to each other is fed at an angle with respect to the feeding direction. This woven fabric is soaked in the liquid paste or coated with the liquid paste while being conveyed. Due to the difference in transport speed between the upstream side and the downstream side of the coating (gluing) process, tension is applied to the woven fabric, and the woven fabric is stretched in the transport direction, resulting in a narrow width of the woven fabric. As a result, the crossing angle of the weft yarn with respect to the warp yarn becomes larger than 90 °. After that, in the woven fabric, the coated liquid paste is dried and cooled in a state in which the woven fabric is restricted to the narrowed width, so that the liquid paste is solidified. Therefore, the woven cloth is held by the solidified liquid paste in a state in which the weft threads cross the warp threads at an angle larger than 90 °, and a wide-angle woven cloth is obtained.

According to the manufacturing apparatus of the present invention having the above-mentioned structure, the woven fabric fed from the feeding device is fed by the feeding device at a predetermined speed. During this conveyance process, the woven cloth is pasted with a liquid pasting device. Further, the woven cloth is tensioned by the tension control device and the conveying speed of the woven cloth is made different between the upstream side and the downstream side with the coating device sandwiched therebetween, whereby tension is applied to the woven cloth and the width of the woven cloth is increased. Narrowed. As a result, similar to the operation of the above-described manufacturing method, the weft yarn is inclined from the orthogonal state with respect to the warp yarn, and the crossing angle of the weft yarn with respect to the warp yarn is changed to an angle larger than 90 ° (for example, 120 °). After that, the width of the woven fabric is kept narrow by a tenter, and the liquid paste is dried and solidified by passing through the drying device, and the solidified liquid paste causes the crossing angle between the warp and the weft of the woven fabric. A wide-angle woven fabric can be obtained by being fixed at an angle of more than 90 °.

[0011]

Embodiments of a wide-angle woven cloth manufacturing apparatus according to the present invention will be described below with reference to the drawings, and a manufacturing method of the present invention will be described.

FIG. 1 is a plan view showing an embodiment of a wide-angle woven fabric manufacturing apparatus, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG.

As shown in FIGS. 1 and 2, the present manufacturing apparatus comprises a woven fabric feeding device 1, a woven fabric tension control device 2, a liquid glue coating device 4, and a woven fabric conveying device 5. A woven fabric drying device 6, a woven fabric cooling device 7, and a woven fabric winding device 8 are provided in this order from the left side of the drawing.

In the feeding device 1 at the left end, a rotary shaft 11 for detachably supporting a roll-shaped woven fabric (original fabric) A (FIG. 5) in which warp yarns and weft yarns are pivoted on a support frame 12. It consists of freely arranged structures.

The tension control device 2 is installed on the right side of the feeding device 1 and has a pair of upper and lower drive rolls 21 and 22. The drive rolls 21 and 22 are rotatably disposed above the support frame 23, and the rotational force is transmitted from the line drive shaft 31 driven in series by the main motor 3 to the rotary shaft 33 via the transmission mechanism 32. Further, the rotational force is transmitted to each of the drive rolls 21 and 22 via the reduction mechanism 34 which can further adjust the reduction ratio. The rotation speeds of the upper and lower drive rolls 21 and 22 are equal, and their rotation directions are opposite to each other,
The lower roll 21 is counterclockwise and the upper roll 22 is clockwise. The peripheral surfaces of the upper and lower drive rolls 21 and 22 are roughened so that the rotational force is reliably transmitted to the woven fabric A.

The conveying device 5 is provided with a drive roll 51 and is installed at a position away from the tension control device 2 on the downstream side in the conveying direction of the woven fabric A by a predetermined distance. This drive roll 51 is
Rotational force is provided from the line drive shaft 31 driven by the main motor 3 via the speed change mechanism and the transmission mechanism 35, which is rotatably disposed on the L-shaped upper support base 53 erected on the support frame 52. It is transmitted and rotates clockwise. Tension control device 2
The speeds of the upper and lower drive rolls 21 and 22 are adjusted by the reduction mechanism 34 so that the rotation speed becomes slower than that of the drive roll 51, and tension is applied to the woven fabric A by this speed difference. Then, the tension applied to the woven fabric A is controlled by adjusting the reduction ratio of the reduction mechanism 34.

Above the drive roll 51 of the upper support base 53, a coating roll 48 supported by an air cylinder 48a so as to be vertically movable and rotatable as shown in FIG. Rotate counterclockwise. A liquid rubber glue dripping tank 49 is disposed downward at the upper end of the upper support 53, and the rubber glue is coated with a roll 48 and a drive roll 51 via a glue receiving plate 49a.
It is supposed to be supplied during.

Further, a dip coating device 41 is provided in the support frame 52 so as to be able to move in and out. The dip coating device 41 includes a container 42 having an open upper end for containing an RFL (resorcin / formalin / latex) liquid and the like, and a dipping roll 43 which is partially immersed in the RFL liquid or the like in the container 42 to rotate. And a pressing roll 44 rotatably arranged so as to be capable of coming into contact with and separating from the dipping roll 43, and the traveling carriage 4
5 is provided. Therefore, in the present embodiment, the liquid paste coating device 4 is mainly composed of the dip coating device 41, the coating roll 48 and the dropping tank 49.

A support pillar 54 is erected at a predetermined distance in front of the support frame 52, and a winding device 91 for the original polyethylene sheet C is arranged at the upper end of the support pillar 54. A guide roll 56 is provided below the support column 54, a guide roll 57 is provided below the support frame 52 at the same height as the guide roll 56, and a guide roll 5 is provided above the support frame 52.
8.59 are rotatably installed. In addition,
The winding device 91 is rotated by the main motor 3 via the friction clutch 92.

The drying device 6 comprises a drying furnace 61 and a carrying device for carrying the woven fabric A into the drying furnace 61.
This transfer device forms a part of the transfer device 5, and includes a drying furnace 6
1 includes a drive unit 63 installed on the downstream side (downstream side in the conveyance direction of the woven fabric A) and a driven unit 64 installed on the upstream side of the drying oven 61. The drive shaft 63a of the drive unit 63 has a drive shaft 63a. A pair of sprockets 63b is mounted so that the spacing can be adjusted, and a pair of sprockets 64b is also mounted on the driven shaft 64a of the driven portion 64 so that the spacing can be adjusted. An endless tenter chain 65 with tenter pins is stretched between the left and right downstream sprockets 63b and the left and right upstream sprockets 64b. Although not shown, one end of the drive shaft 63a is connected to the line drive shaft 31 via a transmission mechanism and a speed reduction mechanism so that the peripheral speed of the drive roll 51 becomes equal to the traveling speed of the tenter chain 65. It is adjusted by the speed change mechanism.

Further, a pair of guide members 66 are provided between the drying oven 61 and the driving portion 63, and a pair of guide members 67 are provided between the driven portion 64 and the drying oven 61, and the left and right spiral directions are opposite to each other. The distance is adjustable through the spiral rods 66a and 67a. That is, one ends of the left and right guide members 66 are screwed into the spiral rod 66a, and one ends of the left and right guide members 67 are screwed into the spiral rod 67a. The spiral rod 67a is connected to the spiral rod 66a by a chain, and by rotating the spiral rod 66a in one direction, the spacing between the guide members 66 is increased.
It is adjusted in conjunction with the interval of 7. The distance between them is set according to the width of the woven fabric A.

The cooling device 7 comprises a pair of upper and lower cooling rolls 71.
72 is rotatably provided on the support frame 73, and one end of one of the cooling rolls 71 or 72 is connected to a transmission 77 connected to the line drive shaft 31 by a timing belt (not shown) to cool the cooling roll 71. The peripheral speed of 72 is set to be equal to the peripheral speed of the drive roll 51. In addition, the woven fabric A ′ is placed on the support base 74 that is continuously provided in front of the support frame 73.
The ear trimming mechanism 75 is provided, and each roll forming the ear trimming mechanism 75 is connected to the transmission 77 through a transmission mechanism 78 including a pulley and a rotary shaft. Further, a feeding device 93 for the polyethylene sheet C is arranged at the upper end portion of the support column 76 which is provided upright on the front end of the support base 74.

The winding device 8 at the right end has a pair of rotation drive shafts 81 for detachably mounting and rotating the winding roll B.
82 is rotatably provided on the support frame 83. The rotary drive shafts 81 and 82 rotate clockwise in FIG. 2 via a ring cone continuously variable transmission 84 and a transmission mechanism (not shown) that are connected to the line drive shaft 31 by a timing belt (not shown) or the like. To do. Then, by rotating the take-up roll B in the counterclockwise direction by the rotary drive shafts 81 and 82, the woven fabric A fed from the feeding device 1
Is finally wound around the winding roll B.

Reference numerals 85 and 86 in the figure denote guide rollers rotatably arranged between the cooling device 7 and the winding device 8.

Next, a mode (method) for manufacturing a wide-angle woven cloth by the manufacturing apparatus of the above-mentioned embodiment will be described with reference to FIG.

First, a roll-shaped woven fabric A made of a plain weave or the like in which the warp and the weft are orthogonal to the rotary shaft 11 of the feeding device 1.
(Fig. 4) is attached, and one end of the woven fabric A is driven by the drive roll 21.
22 through the S-shape, and as shown in FIG.
After passing through 58, it is guided between the dipping roll 43 and the pressing roll 44, through the guide roll 59 to the driving roll 51, and the both side edges of the woven fabric A are attached to the tenter pins of the left and right tenter chains 65. At this time,
Distance between the left and right tenter chains 65 and the guide member 6
The spacing between 6.66 and 67.67 is adjusted according to the planned reduction width of the woven fabric A (corresponding to the width of the wide-angle woven fabric A ′).
One end of the polyethylene sheet C derived from the woven (original) fabric A is attached to the winding device 91.

The line drive shaft 31 is rotated by the main motor 3, and the drive roll 51, the drive rolls 21 and 22, and the drive shaft 63a are simultaneously rotated in a predetermined direction (clockwise except the drive roll 22). Further, the winding motor 91 is rotated by the main motor 3 via the friction clutch 92.

As a result, the woven fabric A is fed out at an angle to the feeding (feeding) direction of the warp yarn A1 as shown in FIG. 4, and is fed while being immersed (dipping) in the RFL liquid in the container 42. It The speed reducing mechanism 34 (FIG. 1) adjusts the peripheral speed of the drive rolls 21 and 22 on the opposite side of the RFL liquid treatment step to be lower than the peripheral speed of the drive roll 51 on the transport direction side. Therefore, tension acts on the woven fabric A due to the difference in the transport speed between the front and rear, and the woven fabric A
Are stretched in the transport direction. Therefore, the width of the woven fabric A on the conveying direction side from the drive roll 51 becomes narrow, and the weft intersects with the warp at an angle (for example, 105 °) larger than 90 °. This crossing angle is determined by the tension acting on the woven fabric A. Since this tension is proportional to the width of the woven fabric A'in front of the drive roll 51, the width of the woven fabric A'is measured at the position M in FIG. Then, the peripheral speed of the drive rolls 21 and 22 is controlled by the reduction mechanism 34 so that a predetermined reduction width can be obtained.

Next, the woven fabric A'is conveyed in the drying furnace 61 while being regulated by the left and right tenter chains 65 in the narrowed width, and the RFL liquid is dried and solidified.
After that, the woven fabric A ′ is cooled by the cooling rolls 71 and 72, and the wide-angle woven fabric A ′ as shown in FIG. 5 is obtained.

This wide-angle woven fabric A'is passed through the selvage trimming mechanism 75, then guided to the winding roll B via the guide rolls 85 and 86, and together with the polyethylene sheet C fed from the feeding device 93, the rotary drive shaft. The 81 and 82 are rotated to be wound around the winding roll B.

Wide-angle woven fabric A'produced as described above
After being taken up by the take-up roll B, the take-up roll B is attached to the feeding device 1 and is taken up by another take-up roll by substantially the same operations as above. At the time of this second winding, the wide-angle woven fabric A ′ is passed over the drive roll 51 without passing through the dipping roll 43 in the container 42, the coating roll 48 is brought into contact with the wide-angle woven fabric A ′, and the drip tank 4
Liquid rubber paste is supplied onto roll 48 from No. 9 and applied to wide-angle woven fabric A ′. Further, since the crossing angle of the wide-angle woven fabric A'where the weft yarns intersect with the warp yarns at an angle larger than 90 ° (for example, 105 °) is further increased, if the increasing angle is small, The deceleration mechanism 34 adjusts the peripheral speeds of the drive rolls 21 and 22 so as to be slightly higher than the previous time, and the tension acting on the wide-angle woven fabric A ′ is made slightly smaller.

As described above, a wide-angle woven fabric having a desired crossing angle can be obtained. However, the above-mentioned steps (1) to (2) are not limited to repeating twice, but the type of the dipping liquid or the coating liquid can be changed. It may be repeated three times or more, or only once.

In FIG. 1, the woven cloth A shows almost no change in the state shown in FIG. 4 in the X section, and the width of the woven cloth A is narrowed in the Y section, resulting in the state shown in FIGS. 4 to 5. Gradually changes to a so-called wide-angle woven fabric A ′ in the state shown in FIG.

By the way, in the above embodiment, the tension is applied to the woven fabric A by making the conveying speed of the woven fabric A on the upstream side of the coating device 4 slower than that on the downstream side by the tension control device 2. Woven fabric A on the downstream side of the coating device 4
Even if the tension is applied to the woven cloth A by increasing the conveying speed of the above than that of the upstream side, the same operation can be performed.

[0035]

As is clear from the above description,
The method and apparatus for manufacturing a wide-angle woven fabric of the present invention have the following effects.

(1) In the production method of the present invention, a wide-angle woven fabric can be produced from an inexpensive general-purpose woven fabric such as a plain weave in which warp yarns and weft yarns intersect at right angles. Since it is not always necessary to keep the parallel to each other, the manufacturing process is simplified, the production efficiency is high, and the wide-angle woven fabric can be obtained at low cost. Further, in the manufacturing method of the present invention, by applying tension to the woven cloth, the width of the woven cloth to be narrowed (width reduction degree) is proportional to the intersection angle (wide angle) of the weft threads with respect to the warp threads. The wide angle of the woven fabric can be easily determined based on the width. Further, since the tension applied to the woven fabric can be adjusted by controlling the speed difference between the front and rear positions in the transport direction of the woven fabric, the wide angle of the woven fabric can be set accurately and easily.

(2) The manufacturing apparatus of the present invention has a simpler structure than the conventional apparatus described above, the equipment cost is low, and the installation space is small. In particular, by adjusting the tension applied to the woven fabric with the tension control device, the wide angle of the woven fabric can be arbitrarily changed, so wide-angle woven fabrics with different warp and weft crossing angles can be manufactured, and can be used for a wide range of applications. ..

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a wide-angle woven fabric manufacturing apparatus according to the present invention.

FIG. 2 is a side view showing the manufacturing apparatus of FIG.

3 is a partially enlarged view of the manufacturing apparatus of FIG.

FIG. 4 is a plan view showing a woven fabric such as a plain weave in which warps and wefts are orthogonal to each other.

FIG. 5 is a plan view showing a wide-angle woven fabric in which the warp and the weft produced by the production method of the present invention intersect at an angle larger than 90 °.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Feeding device 2 Tension control device 4 Gluing device 5 Conveying device 6 Drying device 7 Cooling device 8 Winding device 21/22/51 Drive roll 34 Reduction mechanism 61 Drying furnace A Woven fabric A'Wide angle woven fabric

Claims (2)

[Claims] 1. A woven cloth in which a warp and a weft intersect with each other at 90 ° is fed out, and while the liquid cloth such as a rubber paste is applied to the woven cloth, the woven cloth is conveyed and the coating step is sandwiched therebetween. The conveying speed of the woven cloth on the downstream side in the conveying direction is made relatively faster than the conveying speed on the upstream side, and tension is applied to the woven cloth in the conveying direction, so that the width of the woven cloth at the feeding position is increased. By narrowing the width of the cloth so that the crossing angle of the weft threads with respect to the warp is larger than 90 °, the woven cloth is restricted to the narrow width to dry the liquid glue, and the wound cloth is cooled and wound up. A method for producing a wide-angle woven fabric, which is characterized by the above. 2. A feeding device for feeding a woven fabric wound into a roll and having warps and wefts intersecting at 90 °, and a conveying device for conveying the woven fabric fed from the feeding device at a predetermined speed. A coating device for immersing or applying liquid glue such as rubber paste on a woven fabric in the middle of transportation, and a woven fabric transportation speed which is installed upstream of the coating device and is relatively slower than that of the transportation device. It has a tension control device that controls the speed and applies an arbitrary tension to the woven fabric, and a tenter that holds both sides of the woven fabric within a width narrowed by applying a tension by the tension control device. A wide-angle woven fabric manufacturing apparatus, comprising: a drying device that dries liquid paste by transporting it.