JPH08134751A - Monitor for watching mechanical operation of weaving machine - Google Patents

Abstract

PURPOSE: To analyze the wave form of the output signal which has detected the tension of the cloth or the warp at a prescribed position on the weaving machine, judge the mechanical operation and carry out effective maintenance. CONSTITUTION: In order to monitor the mechanical operations of a weaving machine, the tensions are detected with sensors 16, 17 on both sides of the cloth fell ends, the outputs signals are amplified with pre-amplifiers 18, 19, respectively. Then, they are digitalized through individual A/D converters in a circumstantial judgment means 20 comprising a wave form-analyzing circuit and the wave forms of both signals are compared. In the case that both of these wave forms do not coincide, the weaving machine is stopped, as it is judged that any defective occurs, to monitor abnormal barre mark, defect in weft insertion and mechanical operations of the weaving machine such as mechanical vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical operating condition monitoring device for a loom.

[0002]

2. Description of the Related Art Generally, a loom generally inserts a weft into the opening of the warp while alternately forming upper and lower warps of the warp in synchronization with the rotation of the main shaft and repeatedly forming the opening of the warp. The fabric is woven by hammering the weft with a reed. This loom has a water jet system in which wefts are inserted into the openings of the warp by a water flow, and an air jet system in which wefts are inserted into the openings of the warp by an air flow.

Further, when the weaving machine is unable to weave the cloth normally when the machine steps such as the main shaft and the weft insertion of the weft become abnormal, for example, when the machine step is fed out and the winding system becomes abnormal. In addition, abnormal horizontal stripes may appear on the cloth, or if the weft insertion failure occurs, the defects of the cloth may increase and the quality of the cloth may deteriorate. Therefore, conventionally, a human visually inspects the machine stage to detect a weft insertion defect of the weft by a weft detection device. Further, there is no one that comprehensively detects the balance of the loom.

[0004]

In the above-mentioned loom, since a human visually inspects the machine step, a lot of manpower is required. Also,
Since weft insertion failure is detected by the weft detection device,
A complicated and expensive weft detection device is required to detect weft insertion defects.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a loom mechanical operating condition monitoring device capable of detecting abnormality of a loom, reducing manpower, and having a simple structure and low cost.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 alternately forms upper and lower warps of a warp yarn having a predetermined tension, and repeatedly forms an opening portion of the warp yarn. On the other hand, in a loom for weaving a cloth by inserting a weft into the opening of the warp and driving it with a reed, a tension detecting means for detecting the tension of the cloth or the warp at a predetermined position and an output of the tension detecting means. And a mechanical operating state determining means for determining the mechanical operating state of the loom from the signal waveform.

According to a second aspect of the present invention, in the mechanical operating state monitoring device for a loom according to the first aspect, the mechanical operating state determining means determines the mechanical vibration in the operating state of the loom from the output signal waveform of the tension detecting means. To determine the mechanical operating state of the loom.

[0008]

According to the invention described in claim 1, the tension of the cloth or warp is detected at a predetermined position by the tension detecting means, and the mechanical operating state determining means determines the mechanical operating state of the loom from the output signal waveform of the tension detecting means. to decide.

According to a second aspect of the present invention, in the mechanical operating state monitoring device for the loom according to the first aspect, the mechanical operating state determining means determines the mechanical vibration in the operating state of the loom from the output signal waveform of the tension detecting means. To determine the mechanical operating state of the loom.

[0010]

1 shows a first embodiment of the present invention, and FIG. 2 shows an example of a loom equipped with the first embodiment. In this loom, the upper yarn and the lower yarn of the warp 11 are alternately replaced and the opening of the warp 11 is repeatedly formed, while the weft 12 is fed to the nozzle 13
From the cloth 1 by jetting with water or air from the weft into the opening of the warp 11 and driving the weft 12 with the reed 14.
Weave 5 This operation is performed in synchronism with the rotation of the main shaft of the loom, and the warp 11 is delivered from the warp delivery device in synchronism with the rotation of the main shaft of the loom and the cloth 15
Is wound in synchronization with the rotation of the main shaft of the loom by the cloth winding device, so that the warp yarn 11 has a predetermined tension.

In this embodiment, the tension on one side or both sides of the cloth 15 near the cloth fell is detected by the tension detecting means 16 and 17 composed of tension sensors. The tension detection signals from the tension sensors 16 and 17 are amplified by the preamplifiers 18 and 19, and the mechanical operating state determination means 20 including a waveform analysis circuit A
After being converted into digital signals by the / D converters 21 and 22, waveform analysis is performed to determine the mechanical operating state of the loom.

Cloth 1 detected by tension sensors 16 and 17
The tension of both end portions of No. 5 near the cloth fell changes depending on the operation of the loom, mechanical vibration, tension of the warp 11, the weft insertion state of the weft 12, and the like. Therefore, the waveform analysis circuit 20 analyzes the waveforms of the tension detection signals from the tension sensors 16 and 17 according to the operation of the loom (according to the rotation angle of the main shaft), and the loom is operating with good balance. Whether the loom is mechanically operating (abnormal machine stage, defective weft insertion, mechanical vibration, etc.). For example, as shown in FIGS. 9 and 10, the waveform analysis circuit 20 uses the tension sensor 16,
The two tension detection signals from 17 are converted into digital signals and stored in the storage means, and the waveforms of these two stored tension detection signals are analyzed. For example, the waveforms of the two tension detection signals are compared and both are detected. If they do not match, it is determined that a defect has occurred, the machine is stopped, and the content of the defect is displayed on the display means.

When the waveforms of the two tension detection signals match, the waveform analysis circuit 20 stores an angle signal (tension from the tension sensors 16 and 17 during normal operation of the loom) stored in advance in the nonvolatile memory. (Detection signal) is compared with the two tension detection signals stored in the storage means, and if the two do not match, it is determined that a failure has occurred, the machine is stopped, and the content of the failure is displayed on the display means. . The broken line portion of the tension detection signal shown in FIG. 10 is a waveform at the time of abnormality.

The loom is provided with temples (a mechanism for adjusting the cloth cloth width of the cloth 15 to the warp thread 11 passing width of the reed 14) at both end portions near the cloth cloth. 3 to 5 are a perspective view, a partially cutaway side view and a front view showing the one end side temples 23 and 24 and FIG. 6 is a plan view showing a part thereof. One end of the temple 23 is finely attached to the support arm 26 of the temple bracket 25 by a screw 31 via an elastic body 28 made of rubber and a movable member 29 made of a top, and the other end of the temple 23 is attached via a top 29. Are fixed by screws 30.

A ring 3 is attached to the head portions of the temples 23 and 24.
2, 33 are rotatably attached to the ring 32,
33 has a large number of needles 34 protruding. Below the temple 23, a guide member 3 including a temple cover having a U-shaped cross section.
5 are arranged. The cloth 15 is provided near the cloth fell by the upper end of the temple cover 35 and the guide portion 25 of the temple bracket 25.
Although it is taken up by the cloth take-up device via a, it is pressed downward in the temple cover 35 by the temple 23,
The temple 24 presses downward between the temple cover 35 and the guide portion 25a of the temple bracket 25.

The rings 32 and 33 are pressed by the cloth 15 near the ends of the cloth 15 so that the needle 34 sticks into the cloth 15 and is rotated by the winding movement of the cloth 15 so that the needle 34 moves the cloth 15 to the outside. By pulling, the cloth 15 has a cloth fell width of the reed 14
One width is adjusted. A recess is formed on the lower side of the central portion of the top 29, and the tension sensor 16 is provided in this recess.
For the tension sensors 16 and 17, for example, strain gauges are used.
One end of the temple 23 is attached to the support arm 26 of the temple bracket 25 by a screw 31 via an elastic body 28 made of rubber and a piece 29, and the other end is fixed by a screw 30 via the piece 29. Therefore, one end of the temple 23 is deformed in the vertical direction according to the tension of the cloth 15, and accordingly, one end of the top 29 is deformed in the vertical direction and the strain gauge 16 receives the pressure and the strain gauge 16 moves. Detect tension. Further, the pressure detecting means similar to the above is also provided on the other end side of the cloth 15, and the strain gauge 17 receives the pressure and detects the tension of the cloth 15.

In the first embodiment, the tensions of both end portions of the cloth 15 near the cloth fell are detected by the tension sensors 16 and 17, and the waveform of the tension detection signal from the tension sensors 16 and 17 is detected by the waveform analysis circuit 20. Since the mechanical operating state of the loom is analyzed by analyzing according to the operation of the loom (according to the rotation angle of the main shaft), abnormalities of the loom can be easily detected and manpower can be reduced, and the structure is reduced. Easy and cheap to implement.
Further, since the mechanical operating state of the loom is determined by determining the mechanical vibration or the like in the operating state of the loom from the output signal waveforms of the tension sensors 16 and 17, it is possible to check the wear of parts and the abnormality of the drive unit in advance. Can also be effectively maintained. As shown in FIGS. 4 and 8, the temple 23 is provided with grooves 27, 27a on the upper surface or the side surface of the temple 23 in order to greatly deform the temple 23 or to detect various deformations of the temple 23 with a strain gauge. May be formed.

FIG. 11 is a partially cutaway side view showing the vicinity of the temple 23 on one end side in the second embodiment of the present invention. In the second embodiment, a concave portion is formed on the lower side of the top 29 in the first embodiment, and the strain gauge 16 is fixed to the concave portion. The second embodiment operates in the same manner as the first embodiment. And similar effects can be obtained.

FIG. 7 is a side view showing the vicinity of the temple 23 on one end side in the third embodiment of the present invention. In the third embodiment, the strain gauge 16 is directly fixed in the groove 27 of the temple 23 in the first embodiment, and the same operation as in the first embodiment is performed. Is obtained.

FIG. 12 is a partially cutaway side view showing the vicinity of the temple 23 on one end side in the fourth embodiment of the present invention. The fourth embodiment is such that, in the first embodiment, a concave portion is formed on the upper side of the top 29 and the strain gauge 16 is fixed thereto, and the same operation as in the first embodiment is performed. Similar effects are obtained.

In each of the above embodiments, the two tops 23 and 24 on both ends of the cloth 15 may be one top, and the tension sensors 16 and 17 may be provided on the top 24 side. Further, the tension sensors 16 and 17 may not be provided on the top, and one tension sensor may detect the tension of an appropriate portion on the cloth fell side of the cloth 15. Further, the tension sensors 16 and 17 may detect the tension of the warp.

[0022]

As described above, according to the invention of claim 1, the upper thread and the lower thread of the warp threads having a predetermined tension are alternately replaced with each other to repeatedly form the openings of the warp threads, In a weaving machine for weaving a cloth by inserting a weft into the opening and driving it with a reed, a tension detecting means for detecting the tension of the cloth or the warp at a predetermined position, and an output signal waveform of the tension detecting means from the loom Since the mechanical operating state determining means for determining the mechanical operating state is provided, it is possible to detect an abnormality of the loom and reduce manpower, and the configuration is simple and can be realized at low cost.

According to a second aspect of the present invention, in the mechanical operating state monitoring device for a loom according to the first aspect, the mechanical operating state determining means determines the operating state of the loom based on the output signal waveform of the tension detecting means. Since the mechanical operation state of the loom is determined by judging the mechanical vibration, wear of parts and abnormality of the drive unit can be checked in advance, and maintenance of the machine can be effectively performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a plan view showing an example of a loom including the first embodiment.

FIG. 3 is a perspective view showing the vicinity of a temple on one end side of the first embodiment.

FIG. 4 is a partially cutaway side view showing the vicinity of a temple on the same end side.

FIG. 5 is a front view showing the vicinity of a temple on the same end side.

FIG. 6 is a plan view showing the vicinity of a temple on the same end side.

FIG. 7 is a back view showing the vicinity of the temple on one end side in the third embodiment of the present invention.

FIG. 8 is a side view showing a temple according to another embodiment of the present invention.

FIG. 9 is a flowchart showing a part of the processing flow of the waveform analysis circuit in the above embodiment.

FIG. 10 is a timing chart showing signal waveforms of the above-described embodiment.

FIG. 11 is a partially cutaway side view showing the vicinity of the temple on one end side in the second embodiment of the present invention.

FIG. 12 is a partially cutaway side view showing the vicinity of a temple on one end side in a fourth embodiment of the present invention.

[Explanation of symbols]

 11 warp 15 cloth 16 and 17 tension sensor 20 waveform analysis circuit

Claims (2)

[Claims] Claims: 1. By alternately replacing the upper thread and the lower thread of the warp having a predetermined tension and repeatedly forming the opening of the warp, weft is inserted into the opening of the warp and driven by a reed. In a loom for weaving cloth, tension detecting means for detecting the tension of the cloth or warp at a predetermined position, and mechanical operating state determining means for determining the mechanical operating state of the loom from the output signal waveform of the tension detecting means. A mechanical operating condition monitoring device for a loom, comprising: 2. The loom mechanical operating condition monitoring apparatus according to claim 1, wherein the mechanical operating condition judging means judges mechanical vibration in the operating condition of the loom from the output signal waveform of the tension detecting means. A mechanical operating condition monitoring device for a loom characterized by determining a mechanical operating condition.