JP3080200B2 - Cloth roll replacement time detection device for loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth roll replacement timing detecting device for detecting the replacement timing of a cloth roll for winding a woven cloth by detecting a predetermined detection mark formed on a warp in a loom. About.

[0002]

2. Description of the Related Art In general, when a predetermined amount of woven fabric is wound on a wrapping roll during weaving and becomes full, a series of cutting of woven fabric, lowering of the wrapping roll, mounting of an empty wrapping roll, and wrapping a cloth end. Work of replacing the cloth roll is required. Here, in order to perform this replacement work, it must be detected that a predetermined amount of the woven cloth has been wound on the cloth roll. Conventionally, as this detecting means, for example, as disclosed in Japanese Patent Application Laid-Open No. 3-279443,
Marking a predetermined portion of the warp with a magnetic material paint or the like, a magnetic sensor for detecting the magnetic material is provided, and based on an output signal of the magnetic sensor, a time for replacing the cloth roll is determined,
There has been proposed a cloth roll replacement time detecting device that turns on a loom or emits a warning or the like.

Further, Japanese Utility Model Laid-Open No. 48-5062 and Japanese Utility Model Laid-Open No. 48-5063 disclose a technique for changing the weaving method in the case of continuously weaving a woven fabric having a pattern that appears repeatedly at a fixed length. A stop device for temporarily stopping a loom for each portion that is a boundary of a pattern is disclosed. Also in this case, in order to stop the loom at an accurate position, a conductor or magnetic mark is formed at a predetermined position of the warp so that the loom is reliably stopped at a predetermined position of the fabric.

[0004]

In the above prior art, as disclosed in Japanese Utility Model Laid-Open Publication No. 48-5063, when an electrolyte such as saline is used as a conductor, the loom through which the warp passes. However, there is also a problem that the components such as dropper pins, healds, reeds and the like are easily oxidized, and the rust of the components adheres to the warp yarns to cause defective products. It is also conceivable to use other conductive paints.However, in general, conductive paints are obtained by mixing metal particles in the paint, and there is a problem that the conductivity decreases when the metal particles are oxidized. Rust, which is an oxide produced by the above, may adhere to the woven fabric and result in a defective product. Also, Japanese Unexamined Patent Publication (Kokai) No. Hei 3-279443 and Japanese Utility Model Laid-Open Publication No.
As disclosed in Japanese Unexamined Patent Publication, when a magnetic material paint is applied to a warp to detect magnetism, a magnetizing device that magnetizes the magnetic material is required to detect the applied magnetic material,
There is a problem that the configuration increases. Further, the magnetic paint is a mixture of particles of a magnetic metal oxide in the paint, and has a problem that the metal oxide adversely affects the fabric similarly to the above.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to reliably detect a mark attached to a warp with a simple structure, and has no adverse effect on a woven fabric. It is an object of the present invention to provide a cloth roll replacement time detecting device capable of accurately performing roll replacement.

[0006]

According to the present invention, there is provided a mark for detecting a non-metallic material attached to a warp wound around a delivery beam in advance, a capacitance change detecting means for detecting the mark for detection, A cloth roll replacement time of a loom provided with cloth roll replacement time determination means for determining a replacement time of a cloth roll wound around a woven cloth by detecting the detection mark by the capacitance change detecting means. It is a detection device.

[0007]

According to the cloth roll change detection device for a loom of the present invention, the output of the capacitance change detecting means changes when the detection mark provided on the warp passes near the capacitance change detecting means. Then, based on the change in the output, the cloth roll replacement time determining means determines the cloth roll replacement time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in the loom provided with the cloth roll replacement time detecting device of this embodiment, the warp 12 wound around the delivery beam 10
4. It is sent to the weft insertion unit 18 via the heald 16. At a portion where the warp 12 is stretched between the tension roll 14 and the heald 16, a capacitance type proximity sensor 20 for detecting a change in capacitance is provided near the warp 12.
The output of the proximity sensor 20 is connected to a control device 22 which is a cloth roll replacement time determination unit.

In order to insert the weft yarn 24 into the weft insertion portion 18 by a weft insertion device (not shown), an opening 26
Are formed, and a reed 28 is provided to be swingable. The woven fabric 30 which is wefted and beaten and woven is wound around a winding roller 34 via a guide roll 32,
A predetermined amount is wound around the cloth roll 36.

The warp 12 has a detection mark 40 made of carbon paint or black ink at a predetermined winding amount in a warping process. The detection mark 40 attached to the warp 12 is, as shown in FIG.
Is formed only on the warp 12 at the end of the warp sheet at the portion traveling and facing. Note that the mounting position of the proximity sensor 20 is as follows.
In addition to the position just before the weft insertion portion 18 and during the process after the woven fabric 30 is formed, for example, as shown by a two-dot chain line in FIG. They may be provided facing each other. Further, as the detection mark 40,
The warp yarns 12 and the weft yarns 24 have different dielectric constants, and may be made of a non-metallic material such as ceramics or glass powder, rubber or resin, or a mixture thereof. In addition. Instead of mixing these powders in the liquid paint and attaching them to the warp, the powder itself may be spread on the warp without using the liquid paint. For example, powdered carbon may be applied to the warp or the core made of a carbon body may be directly applied to the warp with a pencil.

The operation and operation of the cloth roll replacement time detecting device of this embodiment will be described below. Delivery beam 10
As is well known, the warp 12 drawn out of the weft insertion portion 1
The woven fabric 30 is formed by interlacing with the weft yarn 24 inserted in step 8 and wound around the cloth winding roll 36. Cloth roll 36
Must be replaced when the predetermined winding amount is reached, the predetermined winding amount is detected by the length of the warp yarn 12. The length of the woven warp yarn 12 is determined by the detection mark 40 applied over time, and when the detection mark 40 approaches below the proximity sensor 20, the proximity sensor 20 moves the detection mark 40. To detect. by this,
The fact that the warp yarn 12 has been sent out by the predetermined length is output to the control device 22, and the control device 22 determines that it is time to replace the cloth roll 36, and performs control such as stopping the loom. The detection mechanism of the detection mark 40 by the proximity sensor 20 is such that when the detection mark 40 made of a conductor such as carbon or ceramics approaches, the surface of the detection mark 40 is compared with the case where the warp 12 has passed. Then, a polarization phenomenon occurs between the electrode and the electrode surface of the proximity sensor 20, and the phenomenon that the capacitance increases as compared with the case where the warp 12 has passed therethrough is detected. Then, upon detection of the detection mark 40 attached to the warp 12, the loom is stopped and the cloth winding roll 36 is replaced. Then, the loom is started again, and weaving is performed until the next detection mark 40 is detected. The cloth winding roll 36 may be automatically changed without stopping the loom by providing a known cloth winding roll automatic changing device.

According to the cloth winding roll replacement time detecting device of this embodiment, since the detection mark 40 is formed of carbon, ceramics, resin, or the like, the warp yarn 12 and the woven fabric 3 are formed.
No rust is attached to the zero, and the detection accuracy is high. In addition, the material of the detection mark may be inexpensive, easy to store and clean, and can be implemented at low cost. Further, by using ceramics as the detection mark, friction with a heald or a reed can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. Here, the description of the same members as those in the above embodiment is omitted. In this embodiment, the electrodes 41 and 42 of the sensor 20 are provided to face each other with the woven fabric 30 interposed therebetween. Here, the electrode 41 is a detection electrode, and the electrode 42 is a ground electrode. The sensor 20 is also connected via a sensor circuit 44 including a detection circuit, an amplification circuit, and the like, to a control device that determines the timing of replacing the cloth roll by detecting the detection mark. This embodiment has the same operation as the first embodiment, and has the same effect.

Next, a third embodiment of the present invention will be described with reference to FIG. Here, the description of the same members as those in the above embodiment is omitted. In this embodiment, in order to detect the detection mark 40, the first sensor 20 and the second sensor 2
1 is provided. The first sensor 20 and the second sensor 21 are connected to sensor circuits 46 and 47 each including a detection circuit and an amplification circuit, and the sensor circuits 46 and 47 are connected to an AND circuit 48.

In this embodiment, when both the output of the first sensor 20 and the output of the second sensor 21 detect the detection mark 40, a detection signal of the detection mark is sent to the control device. The detection mark detection signal is not erroneously transmitted to the control device by detecting a stain or the like, so that the detection accuracy can be improved. Further, the number of sensors may be further increased to increase the detection accuracy.

It should be noted that the cloth roll replacement time detecting device of the present invention is not limited to the above-described embodiment, and the sensor can be mounted at a position where only the warp is running or a portion where a woven fabric is formed. Either may be used. Further, the detection mark is a material that can detect a change in capacitance, and is a nonmetallic material that does not adversely affect warp or woven fabric due to rust by itself or a chemical change such as oxidation. good. Also,
The detection marks are used to avoid interference with parts of the loom, such as heddles and reeds, through which the warp passes and comes in contact with each other.
It is preferable to attach to the warp with a thickness that does not interfere with these components.

[0017]

According to the cloth roll replacement time detecting device of the present invention, the warp is provided with a mark for detecting a non-metallic material.
It has no adverse effect such as the attachment of rust due to the detection mark on the warp or woven fabric. Further, the detection mark is detected by the capacitance change detecting means, and the timing of replacing the cloth roll is determined based on a detection signal from the capacitance change detecting means. The detection accuracy is high, and the cloth roll can be accurately replaced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a main part of a cloth roll replacement timing detecting device of a loom according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a sensor unit of the cloth roll replacement time detecting device of the loom of the first embodiment.

FIG. 3 is a perspective view showing a sensor unit of a cloth roll replacement timing detecting device of a loom according to a second embodiment of the present invention.

FIG. 4 is a schematic block diagram showing a sensor unit of a cloth roll replacement timing detecting device of a loom according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sending beam 12 Warp 20 Sensor 22 Control device 30 Woven cloth 36 Cloth roll

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-89670 (JP, A) JP-A-50-12368 (JP, A) JP-A-3-279443 (JP, A) JP-A 62-1987 149950 (JP, A) JP-A-62-206063 (JP, A) JP-A-5-59661 (JP, A) JP-A-3-119171 (JP, A) Japanese Utility Model Laid-Open No. 48-5062 (JP, U) Japanese Utility Model Showa 48-5063 (JP, U) Japanese Patent Publication No. 41-14622 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) D03D 51/18 D03D 49/20 D03J 1/20 D06H 1/00-1/04

Claims (2)

(57) [Claims] 1. A detection mark for a non-metallic material attached to a warp wound around a delivery beam in advance, capacitance change detection means for detecting the detection mark, and capacitance change detection means. A cloth roll replacement time detecting device for a weaving machine, comprising: a cloth roll replacement time determining means for determining a replacement time of a cloth roll that has taken up a woven cloth by detecting the detection mark. 2. The apparatus according to claim 1, wherein the detection mark is made of carbon or a high dielectric material.