JPH09228194A - Easing unit in loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide easing units responsive to the acceleration of a loom without any problem in lifetime. SOLUTION: The easing units 13 and 26 in the form of pipes are formed by providing abrasion preventing films 39, comprising chromium on the outer peripheral surfaces of the pipes composed of unidirectional fibers 37 and 38 made of carbon fibers impregnated with an epoxy resin. The fiber direction of the unidirectional fibers 37 faces the axial line directions of the pipes and the fiber direction of the unidirectional fibers 38 faces the circumferential directions of the pipes. The chromium plating is carried out on the outer peripheral surfaces of the pipes of the unidirectional fibers 37 and 38 containing the epoxy resin to form the abrasion preventing films 39.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easing body in a loom that guides a warp and performs an easing operation for absorbing fluctuations in the tension of the warp.

[0002]

2. Description of the Related Art As a conventional easing body of this type,
A metal pipe-shaped easing roller has been used as disclosed in JP-A-1-149968. However, as the loom speed increases, the easing speed of the easing body also increases, but increasing the easing speed of the easing body causes bending at the central portion in the longitudinal direction of the easing body. Such bending gives uneven tension to a large number of warp yarns guided by the easing body, which causes problems such as collapse of the woven fabric structure and warp yarn entanglement. The heavier the easing body, the greater the deflection,
The use of the metal easing body is disadvantageous in increasing the speed of the loom.

Japanese Utility Model Laid-Open No. 6-10389 discloses a back roller in which a core body made of fiber reinforced resin is subjected to a diameter reduction processing of a metal surface layer through a polymer layer. With such a configuration, the weight of the entire back roller can be reduced, and the amount of bending can be suppressed by increasing the easing speed.

[0004]

However, the actual Kaihei 6-1.
In the configuration of the back roller disclosed in Japanese Patent No. 0389, relative positions of the fiber-reinforced resin core body and the metal surface layer are repeatedly changed by the easing operation, and the core body and the metal surface layer are formed by the resin adhesive forming the polymer layer. There is a risk that the joint will be destroyed. Such destruction shortens the life of the easing body.

It is an object of the present invention to provide an easing body which can cope with speedup of a loom and has no problem in life.

[0006]

Therefore, according to the invention of claim 1, an easing body is constructed by forming a metal coating on the outer peripheral surface of a pipe in which fibers are hardened with a resin.

The weight of the metal coating is small in total, and most of the weight of the easing body is fiber and resin. Therefore, the easing body is lightweight, and the bending of the easing body itself due to the easing operation is small. The metal coating is formed on the outer peripheral surface of the pipe by a plating method or the like, and the metal coating prevents abrasion of the easing body due to sliding contact between the warp and the easing body. Since the metal coating is firmly attached to the outer peripheral surface of the pipe, the metal coating is not peeled off by repeated bending of the easing body.

Japanese Utility Model Laid-Open No. 2-61871 discloses a technical idea of using a pipe made of fiber reinforced resin whose outer peripheral surface is coated with a metal coating as a functional member that moves left and right in a textile machine. However, no consideration is given to the bending in the direction orthogonal to the central axis of the pipe.

According to the second aspect of the present invention, the easing body is formed by overlapping the unidirectional fibers in a plurality of directions at different positions in at least a part of the pipe in the radial direction. By stacking the unidirectional fibers in different directions, the rigidity of the pipe is improved as compared with the case where the unidirectional fibers are stacked in the same direction.

According to the third aspect of the invention, the easing body is formed by stacking the unidirectional fibers in a plurality of different directions on the inner peripheral surface side of the pipe. By overlapping the unidirectional fibers in a plurality of directions on the circumferential surface of the pipe, damage to the circumferential surface due to repeated bending is prevented.

According to the fourth aspect of the present invention, the easing body is formed by stacking the woven fabric-shaped fibers on at least a part of the pipe in the radial direction. The rigidity of the pipe is improved by overlapping the woven fabric fibers.

According to the fifth aspect of the invention, the easing body is constructed by stacking woven fabric-shaped fibers on the inner peripheral surface side of the pipe. By overlapping the woven fabric-shaped fibers on the peripheral surface of the pipe, damage to the peripheral surface due to repeated bending is prevented.

According to the invention of claim 6, the easing body of claims 1 to 5 is used as an easing body of a pile loom. It is preferable to apply the easing body according to any one of claims 1 to 5 to an easing body that performs a large easing operation for absorbing the tension fluctuation of the pile warp while guiding the pile warp.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment in which the present invention is embodied as an easing body used in a pile loom will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows a side view of the entire pile loom.
Is a warp beam for weaving. Warp beam 11 for plain weave
Is driven to rotate by a delivery motor Mg. The ground warp T fed from the warp beam 11 for weaving by the operation of the feed motor Mg is passed through the heddle 14 and the reed 15 through the back roller 12 and the pipe-shaped easing body 13. The towel woven cloth W is wound around the cross roller 20 via the expansion bar 16, the surface roller 17, and the guide rollers 18 and 19.

The easing body 13 is an easing lever 21.
It is supported by the roller shaft 121 of the back roller 12 via the so as to be easable. The spring force of the spring 22 acts on the easing lever 21, and the tension fluctuation of the ground warp T is absorbed by the spring 22. The tension of the ground warp T is detected by the load cell 23 via the easing body 13 and the easing lever 21. The delivery motor Mg is controlled by the delivery control device C1. Sending control device C1
Controls the delivery speed of the delivery motor Mg based on preset reference tension and tension detection information obtained from the load cell 23. Both ends of the easing body 13 are non-rotatably held by the easing lever 21, and the ground warp T rubs the peripheral surface of the easing body 13.

A pile warp beam 24 is supported above the ground warp beam 11. The pile warp beam 24 is rotationally driven by a feed motor Mp. The pile warp yarn Tp delivered from the pile warp beam 24 by the operation of the delivery motor Mp is passed through the heddle 14 and the reed 15 through the back roller 25 and the pipe-shaped easing body 26.

The easing body 26 is an easing lever 27.
It is supported by a support shaft 28 via an easing mechanism.
The spring force of the spring 29 acts on the easing lever 27, and the tension fluctuation of the pile warp thread Tp is absorbed by the spring 22. The tension of the pile warp thread Tp is the easing body 2.
6 and the easing lever 27 to detect the load cell 30. The delivery motor Mp is controlled by the delivery control device C2. The delivery control device C2 controls the delivery speed of the delivery motor Mp based on preset reference tension and tension detection information obtained from the load cell 30. Both ends of the easing body 26 are non-rotatably held by the easing lever 27, and the pile warp threads T rub the peripheral surface of the easing body 26.

The towel weaving mechanism 3 above the intermediate lever 34
1 is driven and controlled by a patterning control device (not shown). A pattern pattern for a towel is input and set in the patterning control device, and the patterning control device controls driving of the towel weaving mechanism 31 based on this pattern pattern. When the pile is formed, the drive lever 32 of the towel weaving mechanism 31 swings,
The swing of the drive lever 32 causes the rod 33, the intermediate lever 31,
It is transmitted to the expansion bar 16 via the rod 35 and the support lever 36. Due to this displacement transmission, the expansion bar 16 is rotationally displaced about the support shaft 361. At the time of beating in the fast pick state, the expansion bar 16 is arranged at the terry amount zero position shown by the solid line in FIG. At the time of beating in the loose pick state, the expansion bar 16 is arranged at a position having a terry amount shown by a chain line in FIG. Drive lever 3 when no pile is formed
2 does not swing, and the expansion bar 16 is held at the position indicated by the solid line in FIG.

As shown in FIG. 2, the pipe-shaped easing bodies 13 and 26 are provided with a wear preventing coating 39 made of chromium on the outer peripheral surface of the pipe made of carbon fiber unidirectional fibers 37 and 38 impregnated with epoxy resin. It is formed by applying.
The fiber direction of the unidirectional fiber 37 is oriented in the axial direction of the pipe, and the fiber direction of the unidirectional fiber 38 is oriented in the circumferential direction of the pipe. The unidirectional fibers 37 and 38 are heated while being wound in multiple layers around a cylindrical core material. Unidirectional fiber 38
Are lapped together only on the winding start portion of the unidirectional fiber 37 and wound around the core together. The heating cures the epoxy resin. After this heating and curing, the core material is removed, and copper is welded to the outer peripheral surfaces of the pipes of the unidirectional fibers 37 and 38 containing epoxy resin. After the copper is welded, chrome plating is applied to the outer peripheral surfaces of the pipes of the unidirectional fibers 37 and 38 containing the epoxy resin to form the wear prevention coating 39.

The following effects are obtained in the first embodiment. (1) The easing amount of the easing body 26 that guides the pile warp threads Tp is large, and the easing operation of the easing body 26 is faster than that of the easing body 13. Therefore, the bending of the easing body 26 tends to increase. However, the pipe-shaped easing bodies 13 and 26 obtained as described above are lightweight, and the easing bodies 13 and 26 are less likely to bend due to a high-speed easing operation. (2) Anti-wear coating 39 formed by electroplating
Is firmly attached to the outer peripheral surface of the pipe and is not peeled off due to the bending of the easing bodies 13 and 26. (3) The wear preventing coating 39 firmly attached to the outer peripheral surface of the pipe prevents wear due to sliding contact with the warp yarns, and the easing bodies 13 and 26 have a long life. (4) Since the fiber direction of the unidirectional fiber 37 is oriented in the axial direction of the pipe, the rigidity against bending in the direction orthogonal to the axial direction of the pipe becomes high. (5) The stress against the load that causes the bending is concentrated on the peripheral surface of the pipe, and there is a possibility that the peripheral surface of the pipe is damaged such as cracks. According to the structure in which the unidirectional fibers 37 and the unidirectional fibers 38 are laminated on the peripheral surface side of the pipe with their fiber directions being different from each other, the above-described damage on the peripheral surface of the pipe does not occur.

The unidirectional fiber 38 may be used at a portion other than the inner peripheral surface of the pipe in the radial direction of the pipe. According to the structure in which the unidirectional fibers 37 and the unidirectional fibers 38 are overlapped with each other in a part of the radial direction of the pipe with their fiber directions being different, the rigidity of the easing bodies 13, 26 is such that the unidirectional fibers are in the same direction. Improves when compared to aligning and stacking. Of course, a configuration in which the unidirectional fibers 37 and the unidirectional fibers 38 are overlapped in different fiber directions over the entire radius of the pipe may be used.

As the fiber, aramid fiber, polyester fiber, glass fiber, high strength polyethylene fiber or the like may be used. As the metal coating, a metal having high wear resistance other than nickel may be used.

Next, a second embodiment shown in FIG. 3 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a carbon fiber woven cloth 40 is used on the inner peripheral surface of a fiber pipe fixed with an epoxy resin. In this embodiment, the same effect as the effect (5) of the first embodiment can be obtained.

The woven fabric 40 may be used at a portion other than the inner peripheral surface of the pipe in the radial direction of the pipe. According to the structure in which the woven cloth 40 is used at a part of the pipe in the radial direction, the rigidity of the easing bodies 13 and 26 is improved as compared with the case where the unidirectional fibers are aligned and stacked in the same direction. Of course, the fiber pipe may be configured only by the woven cloth 40 impregnated with the epoxy resin.

Next, a third embodiment shown in FIG. 4 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. The easing bodies 41 and 4 in this embodiment
The pipe cross-sectional shape of No. 2 is a flat pipe shape long in the easing direction. Such a pipe shape is advantageous in preventing bending in the easing direction.

In the case of the easing body which does not rotate in each of the above-mentioned embodiments, the wear preventing film may be formed only on the peripheral surface portion of the easing body which is in sliding contact with the warp. The present invention can also be applied to a rotating easing body.

[0028]

As described above in detail, according to the present invention, since the easing body is formed by forming the metal coating on the outer peripheral surface of the pipe in which the fiber is hardened with the resin, it is possible to cope with the speedup of the loom and the service life. It also has an excellent effect that there is no problem.

[Brief description of drawings]

FIG. 1 is a side view of the entire loom showing a first embodiment.

FIG. 2A is an enlarged side sectional view of the easing body with a part thereof omitted. (B) is the sectional view on the AA line of (a).

FIG. 3 is a partially omitted enlarged side sectional view showing a second embodiment.

FIG. 4 is a sectional side view of a main part showing a third embodiment.

[Explanation of symbols]

13, 26, 41, 42 ... Easing body, 37, 38 ...
Unidirectional fibers, 39 ... Abrasion resistant coating, 40 ... Woven fabric.

Claims (6)

[Claims] 1. An easing body for a weaving machine that guides the warp and absorbs fluctuations in the tension of the warp, and a metal coating is formed on the outer peripheral surface of a pipe in which fibers are fixed with a resin. body. 2. The easing body for a loom according to claim 1, wherein the unidirectional fibers are stacked in different directions in at least a part of the pipe in the radial direction. 3. An easing body for a loom according to claim 2, wherein the unidirectional fibers are stacked in different directions on the inner peripheral surface side of the pipe. 4. The easing body for a loom according to claim 1, wherein the woven fabric-shaped fibers are superposed on at least a part of the pipe in the radial direction. 5. An easing body for a loom according to claim 4, wherein woven fabric-shaped fibers are laminated on the inner peripheral surface side of the pipe. 6. An easing body for a loom, wherein the easing body according to claim 1 is used as an easing body for a pile loom.