JP2000119940A - Yarn-handling unit in loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a yarn-handling unit made of an acrylonitrile-butadiene- styrene resin from cracking. SOLUTION: The yarn bobbin piece 14 comprises a holder 16 and a plurality of contact bodies 17. The holder 16 is made of an acrylonitrile-butadiene-styrene resin, while the contact bodies 17 are made of ceramic. The yarn bobbin piece 14 is coated all over the surface with the contact inhibitory layer 19, and the contact inhibitory layer 19 is formed by coating the surface of the bobbin piece 14 with a mixed solution of an acrylic resin solution and a urethane resin solution and drying the coated layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn handling device for a loom in which a contact member that contacts a yarn or a group of yarns is supported by a holder.

[0002]

2. Description of the Related Art In a weft measuring and storing device of a winding type as disclosed in Japanese Patent Application Laid-Open No. 62-299551, a weft engaging surface on a plurality of yarn winding pieces for winding a weft is made of a wear-resistant material. Is formed. The use of a wear-resistant material is effective in preventing abrasion of the weft engaging surface due to contact with the moving weft. As the wear resistant material, for example, ceramic or chrome plating is used. In many cases, a synthetic resin is used as the base material of the yarn winding piece provided with the weft locking surface from the viewpoint of cost and workability. In particular, acrylonitrile-butadiene-styrene resin is excellent in cost and processability.

[0003]

However, when the oil agent and the pigment contained in the weft spill on the acrylnitrile-butadiene-styrene resin base material of the thread-wound piece, cracks are early formed in the thread-wound piece. The thread winding piece is molded,
Cracks occur due to the relationship between internal stress after molding and absorption of oils and pigments into the base material. If a crack occurs, the wound piece must be replaced.

An object of the present invention is to prevent the above-mentioned cracks from occurring when acrylonitrile-butadiene-styrene resin is used in a yarn handling device such as a weft length measuring and storing device.

[0005]

SUMMARY OF THE INVENTION To this end, the present invention is directed to a yarn handling device in which a contact member that comes into contact with a yarn or a group of yarns is supported by a holder. The protective layer was made of acrylonitrile-butadiene-styrene resin, and a protective layer was provided on the surface of the support to prevent the damage-inducing substance contained in the thread or thread aggregate from contacting the surface of the support.

[0006] The protective layer prevents contact between the support made of acrylonitrile-butadiene-styrene resin and the damage-inducing substance contained in the yarn or the assembly of yarns, and the support caused by contact with the damage-inducing substance. Damage is prevented.

According to a second aspect of the present invention, in the first aspect,
The contact body and the holding body constitute a yarn winding portion of a winding type weft measuring and storing device. A part of the damage inducing substance contained in the weft wound around the yarn winding part is separated from the weft as the weft moves, and the separated damage inducing substance spills over the yarn winding part. However, the damage-inducing substance separated from the weft is prevented from contacting the support made of acrylonitrile-butadiene-styrene resin due to the presence of the protective layer.

According to a third aspect of the present invention, in the second aspect,
The thread winding portion is composed of a plurality of thread winding pieces arranged in an annular shape, and the thread winding piece includes the holding body and a plurality of contact bodies embedded and supported at intervals in the holding body. Configured.

[0009] The weft is wound around the yarn winding portion in contact with the contact body without contacting the holding body. Since the moving weft does not contact the holder, the holder made of acrylonitrile-butadiene-styrene resin is not damaged due to the contact with the weft.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the protective layer is a layer of a mixture of an acrylic resin and urethane. Layers of such a mixture have excellent solvent resistance.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the contact body is made of ceramic. Ceramic has excellent abrasion resistance to contact with a thread or a collection of threads.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is embodied in a winding type weft length measuring and storing apparatus will be described below with reference to FIGS.

Reference numeral 11 denotes a motor built-in portion, and a thread winding tube 12 orbits around the motor built-in portion 11 by operation of a motor (not shown) in the motor built-in portion 11. Motor built-in part 11
A disk-shaped substrate 13 is fixed to the front surface of.

A plurality of thread winding pieces 14 are provided on the front surface of the substrate 13.
(Four in the present embodiment) are fastened and fixed by screws 15. The thread winding piece 14 includes a holding body 16 and a plurality of contact bodies 17. The plurality of thread winding pieces 14 are arranged annularly in the circumferential direction of the substrate 13, and the plurality of contact bodies 17 of each thread winding piece 14 form a substantially circular shape. An attachment position adjustment hole 161 is formed in the holder 16 in the radial direction of the substrate 13. The screw 15 is inserted into the mounting position adjusting hole 161 and tightened. Accordingly, the position of the thread winding piece 14 constituting the yarn winding portion can be adjusted in the radial direction of the substrate 13.

An electromagnetic solenoid 18 is disposed near the uppermost thread winding piece 14, and the weft locking member 181 is driven by the excitation and demagnetization of the electromagnetic solenoid 18. A hole 162 is formed in the holding body 16 of the uppermost thread winding piece 14, and the weft locking body 181 can enter and exit the hole 162.
The weft Y unwound from the yarn winding tube 12 is wound and stored around the entire contact body 17 by the locking action of the weft locking body 181 protruding into the hole 162. The weft Y wound around the entire contact body 17 contacts only the contact body 17 without contacting the holding body 16. The weft locking member 181 has the hole 1
If it is detached from 62, the wound weft can be pulled out.

The support 16 is made of acrylonitrile-butadiene-styrene resin, and the contact 17 is made of ceramic. A protective layer 19 is provided on the entire surface of the thread winding piece 14. The protective layer 19 is formed by applying a mixture of an acrylic resin solution and a urethane solution to the surface of the thread winding piece 14 and then drying the mixture.

In the first embodiment, the following effects can be obtained. (1-1) The oil agent and the pigment contained in the weft Y moving around the plurality of yarn winding pieces 14 are separated from the weft Y, and
On the surface of. Oils and pigments contain damage-causing substances that cause cracks in acrylonitrile-butadiene-styrene resin.If oils and pigments adhere to acrylonitrile-butadiene-styrene resin, acrylonitrile-butadiene-styrene resin becomes Cracks occur between them. The protective layer 19 provided on the surface of the thread winding piece 14 prevents contact between the support 16 made of acrylonitrile-butadiene-styrene resin and the damage-inducing substance. Therefore, the holder 16 made of acrylonitrile-butadiene-styrene resin does not have cracks caused by contact with the damage-inducing substance. The mixture of acrylic resin and urethane is not damaged by the adhesion of the damage-inducing substance. (1-2) The weft Y is wound around the yarn winding piece 14 by contacting the contact body 17 without contacting the holding body 16. Therefore, the holder 16 made of acrylonitrile-butadiene-styrene resin is not damaged by the contact with the weft Y. (1-3) The weft Y slides on the protective layer 19 on the contact body 17, but the protective layer 19 made of a mixture of acrylic resin and urethane smoothly slides the weft Y, which is inconvenient for inserting the weft Y. Does not occur. (1-4) The ceramic material of the contact body 17 is a weft yarn Y
Excellent wear resistance against contact with steel. Therefore, even if the protective layer 19 applied to the surface of the contact body 17 is worn or peeled off, the winding and pulling out of the weft Y is performed smoothly. Further, since the contact body 17 protrudes from the surface of the holder 16, even if the protective layer 19 applied to the surface of the contact body 17 is worn or peeled, the surface of the holder 16 is still covered by the protective layer 19. . Therefore, the holder 16
Is prevented from contacting with the damage-inducing substance for a long time by the protective layer 19.

Next, a second embodiment shown in FIG. 3 will be described. In this embodiment, a yarn guide 2 for guiding the weft Y
0 is a holding ring 201 made of acrylonitrile-butadiene-styrene resin and a guide ring 20 made of ceramic.
Consists of two. The holding ring 201 becomes a holding body, and the guide ring 202 becomes a contacting body. The entire surface of the yarn guide 20 is covered with the same protective layer 19 as in the first embodiment. The protective layer 19 is made of acrylonitrile-butadiene-
The contact between the styrene resin holding ring 201 and the damage-inducing substance is prevented. Therefore, the retaining ring 201 made of acrylonitrile-butadiene-styrene resin does not crack due to contact with the damage-inducing substance.

Next, a second embodiment shown in FIG. 4 will be described. The guide roller 21 that guides the ears We separated from the woven fabric W includes a holding member 212 rotatably supported by a roller shaft 211, and a ceramic contact member 213 coupled to a peripheral surface of the holding member 212. Consists of The ears We, which are a group of yarns, are guided along the peripheral surface of the contact body 213. The entire surface of the guide roller 21 is covered with the same protective layer 19 as in the first embodiment. The ears We guided by the guide rollers 21 are guided to a dust box (not shown) by the guide rollers 22. Guide roller 2
2 has the same configuration as the guide roller 21.

The protective layer 19 prevents contact between the support 212 made of acrylonitrile-butadiene-styrene resin and the damage-inducing substance. Therefore, the holder 212 made of acrylonitrile-butadiene-styrene resin does not crack due to the contact with the damage-inducing substance.

In the present invention, the following embodiments are also possible. (1) As a material of the protective layer, a synthetic resin having excellent solvent resistance, such as polyoxymethylene, polypropylene, and polybutylene terephthalate, is used. (2) Other than ceramic, chrome,
Use of a wear-resistant material such as TiN or TiC. (3) As the material of the contact body, a material having excellent slipperiness such as alumite, Teflon or the like is used. (4) The present invention is applied to a tensor that mechanically grips a weft in order to apply tension to the weft.

[0022]

As described in detail above, in the present invention, since the protective layer is provided on the surface made of acrylonitrile-butadiene-styrene resin, damage to the holder caused by contact with the damage-inducing substance can be prevented. It has an excellent effect of obtaining.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view showing a first embodiment and incorporating a main part enlarged side cross-sectional view.

FIG. 2 is a front view incorporating a main part enlarged front sectional view.

FIG. 3 is a side sectional view showing a second embodiment.

FIG. 4 is a plan view showing the third embodiment and incorporating an enlarged plan view of a partly broken main part;

[Explanation of symbols]

Reference numeral 16: holding body, 17: contact body, 19: protective layer, 20: thread guide serving as a thread handling device, 201: holding ring serving as a holding body, 202: guide ring serving as a contact body, 21: thread handling device Guide rollers, 212 ... Holder, 213 ...
A contact body, Y: a weft thread, We: an earpiece that is an assembly of threads.

Claims (5)

[Claims] 1. A yarn handling device in a loom in which a contact member that contacts a thread or a group of threads is supported by a retainer, wherein the retainer is made of acrylonitrile-butadiene-styrene resin, and the surface of the retainer is A yarn handling device in a loom provided with a protective layer on the surface for preventing a damage-inducing substance contained in the yarn or the aggregate of yarns from coming into contact with the surface. 2. The yarn handling device according to claim 1, wherein the contact body and the holding member constitute a yarn winding portion of a winding type weft length measuring and storing device. 3. The yarn winding section comprises a plurality of yarn winding pieces arranged in an annular shape, wherein the yarn winding piece comprises:
3. The yarn handling apparatus according to claim 2, comprising a plurality of contact bodies embedded and supported in said holding body at intervals. 4. The yarn handling device according to claim 1, wherein the protective layer is a layer of a mixture of an acrylic resin and urethane. 5. The contact body according to claim 1, wherein said contact body is made of ceramic.
A yarn handling device in a loom according to any one of claims 4 to 4.