JPH07229034A - Automatic stop motion device in warp yarn breakage - Google Patents

Abstract

PURPOSE:To provide an automatic stop motion device in warp yarn breakage, capable of preventing the warp yarns from breaking due to static electricity, improving the warp yarn capturing actions of needlelike units and a brush and preventing a noxious wind from producing. CONSTITUTION:This automatic stop motion device in warp yarn breakage is obtained by arranging an electrically conductive wire 7 in contact with the base part of at least one needlelike unit (6a), earthing one end of the electrically conductive wire 7, constituting the needlelike units (6a) and the brush (6b) of stainless fine wires and forming the tip of each needlelike unit (6b) into a bulged part (6a') having a smoothly rounded tip. The automatic stop motion device is equipped with a rotating roller 6 having the needlelike units (6a) set in the form of a comb and the brush (6b) in which the stainless fine wires are closely set on the outer peripheral surface in close vicinity to a row of shed warp yarns 5 and capable of rotating the rotating roller 6, thrusting the tips of the needlelike units (6a) into the row of the warp yarns 5, drawing out a broken warp yarn to the outside of the row, hooking the broken warp yarn with the brush (6b), stretching the hooked broken warp yarn and automatically stopping a loom utilizing the stretching force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an automatic stop device for cutting a warp in a loom.

[0002]

2. Description of the Related Art Conventionally, various methods such as a dropper method or a photoelectric tube device method have been used as a method of automatically stopping a loom when a warp is cut during weaving of the loom. Since the conventional dropper method uses the same number of droppers as the number of warp yarns, a considerable number of droppers are required,
Not only a great deal of time and labor is required for the preparation work such as the warp threading, but also the dropper is heavily consumed, so that the replacement maintenance cost is large. In the conventional photoelectric tube device type, a photoelectric tube device is installed in the lower part of the warp row, and when the cut warp hangs downward, by blocking the optical path of the photoelectric tube device, the warp cutting is detected and the loom is operated. This photocell device system has been stopped automatically, but there is an advantage that complicated preparatory work such as that of the conventional dropper system can be omitted, but the detection of warp cutting tends to be uncertain. There is.

Therefore, the applicant of the present invention positively rotates in the same direction as the warp transfer direction by contacting only the tips with the upper or lower side of the warp row between the twill bamboo and the heald of the loom. To provide a brush roller for positively pulling the cut warp from the warp row, and to detect the cut warp drawn by the brush roller between the brush roller and the twill bamboo to operate the automatic stop mechanism of the loom. Has been proposed in which the light source and the photoelectric element are arranged on opposite sides of the warp row (see Japanese Patent Publication No. 56-3450). However, it cannot be said that the above-mentioned brush roller has a reliable function of drawing the cut warp from the warp row. In order to improve this point, a rotating roller in which needle-like bodies implanted in a comb shape and brushes densely implanted in a single row or multiple rows are arranged on the outer peripheral surface is used instead of the brush roller. (See Japanese Patent Publication No. 54-36718).

Although the latter proposal described above improves the pulling action of the cut warp yarns generated in the warp yarn row, it has the drawback that it cannot prevent the warp yarns from breaking due to static electricity generated in the warp yarn row. there were. Further, conventionally, the tip of the needle-shaped body is a tapered sharp end, and the action of catching the cut warp is uncertain, so that the action of pulling out the cut warp from the warp row tends to be delayed. Further, conventionally, synthetic fibers or animal hair is used for the brush. These do not have an electrostatic removing action, and when thick hair is used, they impede the entry of cut warp yarns and the catching action deteriorates. Without delaying the automatic stop operation of the loom,
There was a drawback that became uncertain.

[0005]

Therefore, the applicant of the present invention is
A proposal has been made in which a conductive tape is stretched over the entire length of a rotating roller on the base of the needle-shaped body to prevent yarn breakage due to static electricity (Japanese Patent Application No. 4-302797).

However, in the proposed method, when the loom is operated at high speed, the conductive tape serves as a kind of blast source due to the rotation of the roller, which disturbs the warp row to induce a weft insertion error or the warp thread. There are new problems such as inducing breakage, inducing wind-up and floating of the cotton wool, and causing deterioration of product quality and warp cutting due to the generation of nep yarn (knot yarn) due to the adhesion of the cotton wool to the warp row. I knew it would happen.

The present invention has been proposed in view of these problems, and an object thereof is to prevent the warp cutting due to static electricity and improve the warp catching action of needles and brushes. Another object of the present invention is to provide an automatic stop device for cutting warp yarns, which can prevent generation of harmful wind.

[0008]

In order to achieve the above-mentioned object, the present invention provides a rotary roller having on an outer peripheral surface thereof a needle roller which is planted in a comb shape and a brush which is densely planted on an outer peripheral surface. Installed close to each other, rotate the above-mentioned rotating roller to thrust the tip of the needle-like body into the warp row, pull out the cut warp from the row, hook it on the brush to make it tense, and use this tension to loom the loom. In a device for automatically stopping the warp when automatically cutting, the conductive wire is placed in contact with the base of the needle-shaped body that is planted in a comb shape, one end of this conductive wire is grounded, and the needle-shaped body and the brush Is made of stainless steel fine wire, and the tip of the needle-like body is an enormous part with a smooth roundness.

[0009]

[Function] During operation of the loom, the rotating roller also rotates and the tip of the needle-shaped body enters the warp row. Therefore, the static electricity generated in the warp-thread is transferred from the needle-shaped body to the conductive wire arranged in contact with the base thereof. It is guided to the ground via and is removed. As a result, electrostatic charging does not occur between the warp rows, and yarn breakage such as pulling of the warp threads due to this charging is prevented. When the warp is cut, the needle-shaped body of the rotating roller pulls the cut warp out of the warp row, and the brush hooks the pulled cut warp to make it tense. Since the needle-shaped body and the brush are made of stainless steel thin wire, the removal of static electricity is further promoted. In this case, since the tip of the needle-shaped body is an enlarged portion having a smoothly rounded shape, the needle is smoothly entered into the warp row, and when the needle-shaped body exits the warp row, the interval between the adjacent needle-shaped bodies is If there is a cut warp in the warp row because the parts are close to each other and are constricted, the cut warp loses its tension as compared with a normal warp, causing looseness. The needle-like bodies are easily locked at the tip narrowed portions and reliably pulled out from the warp string. on the other hand,
Since a certain amount of tension is applied to the normal warp as compared with the cut warp, and the enlarged distal end of the needle-shaped body is smoothly rounded, the normal warp is removed from the warp row. It is not pulled out, and the needle-like body smoothly escapes from the warp row. As a result, the cut warp threads are reliably pulled out of the warp row. Then, it is captured by the brush.
Since this brush uses a stainless steel thin wire, it does not have the defect that it is too thick like animal hair, and it does not have the defect that it is too thin and its waist is weak. As a result, the tension force is reliably applied to the cut warp yarns, and the response speed and reliability of the automatic stop operation of the loom when the warp yarns are cut are improved.

[0010]

1 is a schematic side view of a weaving portion of a loom to which an embodiment of the present invention is applied, FIG. 2A is an enlarged side view of a rotary roller, and FIG. FIG. 3 is an enlarged view of the tip of the needle-shaped body, and FIG. 3 is a perspective view of the rotating roller.

In FIG. 1, (1) is a breast beam,
As is well known, (2) is a heald, (3) is a bamboo, and (4) is a back beam, and these are a part of the weaving portion of the loom. The warp yarn (5) is sent from the back beam (4) in the direction of the breast beam (1) and undergoes an opening movement by the heald (2) during that time, and a weft insertion mechanism (not shown) is provided between the opened warp yarn rows. Is inserted, and the beating is performed by the beating mechanism (not shown), and the woven fabric is woven.

Reference numeral (6) is a rotary roller provided between the heald (2) and the twill bamboo (3) on the upper surface of the outer side of the warp opening in the vicinity of the warp row. The rotary roller (6) is
It may be installed on the outer lower surface of the warp opening portion, or of course on both the upper and lower surfaces.

As shown in FIG. 2A, the rotating roller (6) includes a needle-like body (6a) which is planted in a comb shape on the outer peripheral surface,
A brush (6b) densely planted, and further, by rotating the rotating roller (6), the tip of the needle-like body (6a) is thrust into the warp row and the cut warp is pulled out of the row. Is installed on the brush (6b) to make it tense, and a mechanism for automatically stopping the loom using this tension is installed. For example, as shown in FIGS. 2 (A) and 3, this mechanism has a plurality of support pins (6c) on the outer peripheral surface of the rotating roller (6) arranged in a row in parallel with the shaft at appropriate intervals. It is installed, the micro switch (6d) is attached to the shaft end, and the other end of the strip (6e) whose one end is attached to its operating piece (not shown) is installed at the other end of the rotating roller (6). The brush is attached to the tip of the pin (6c), and the middle of the strip (6e) is inserted into and supported by the small hole of the support pin (6c) installed in the middle of the rotary roller (6) to be tensioned. The tension force of the cut warp yarn (5 ') caught by (6b) and stretched reaches the ridge (6e) and presses it at the contact point to pull it, actuating the operating piece to activate the micro switch (6d). ) Is closed and the automatic stop mechanism is activated to stop the loom. Be done. The above micro switch (6d)
A proximity switch may be used instead of, and a phototube device may be used.

In the embodiment shown in the drawings, the needle-like body (6a) planted in a comb shape is 180 ° on the outer peripheral surface of the rotating roller (6).
Although the case where two sets are installed at an interval of 2 is shown, it is not limited to this, and only one set or three sets may be provided. 2A along the base of the row of at least one set of needles (6a) installed on the rotating roller (6).
And, as shown in FIG. 3, a conductive wire (7) such as a copper wire is wound around each needle-like body (6a) or arranged in contact by soldering, and one end of the conductive wire (7) is grounded to prevent static electricity. Try to escape. Grounding method is rotating roller (6)
It is electrically connected to the ground through shafts, bearings, conductive brushes, etc.

On the other hand, the brush (6) of the rotary roller (6) is
b) is made of stainless steel thin wire (thickness 0.1 mm),
Further, the needle-shaped body (6a) is composed of a stainless thin wire thicker than the brush (6b) (thickness 1.0 mm), and the tip of the needle-shaped body (6a) is shown in FIG. 2 (B). like,
An enlarged portion (6a ') having a smooth roundness is formed.
The method for forming the enlarging portion (6a ') is, for example, bending into two using an appropriate tool and curling or crimping to form a loop-shaped enlarging portion with less smooth thread catching, but other methods. But it's okay.

[0016]

According to the present invention, the cut warp can be reliably pulled out, and the drawn cut warp can be surely caught by the brush and tensioned to improve the operation accuracy of the automatic stop mechanism of the loom. In addition, it is possible to remove static electricity generated in the warp row, further, it is possible to prevent the generation of harmful wind during the rotation of the rotating roller, it is possible to prevent warp breakage due to disturbance of the warp row, etc., High quality fabrics can be provided.

[Brief description of drawings]

FIG. 1 is a schematic side view of a weaving section of a loom to which an embodiment of the present invention is applied.

FIG. 2A is an enlarged side view of a rotating roller, and FIG. 2B is an enlarged view of a tip of a needle-shaped body attached to the rotating roller.

FIG. 3 is a perspective view of a rotating roller.

[Explanation of symbols]

 5 Warp 6 Rotating Roller 6a Needle 6a 'Enlarged Part 6b Brush 7 Conductive Wire

Claims (1)

[Claims] 1. A rotary roller having a comb-like needle-shaped body and a closely-filled brush on the outer peripheral surface is installed close to the open warp row, and the rotary roller is rotated to rotate the needle. In the automatic stopping device at the time of warp cutting, the tip of the shaped body is thrust into the warp row, the cut warp is pulled out of the row, hooked on the brush to make it tense, and the tension is used to automatically stop the loom. , A conductive wire is placed in contact with the base of the needle-shaped body that is planted in a comb shape, one end of this conductive wire is grounded, and the needle-shaped body and the brush are made of stainless thin wire, and the tip of the needle-shaped body An automatic stop device for cutting warp, characterized in that the part is an enormous part with smooth roundness.