JPH02104744A - Device for diagnosis of picking mechanism - Google Patents

Abstract

PURPOSE:To judge operation states of a pump, nozzle, etc., and the state of adjustment, etc., of timing of the various operations by measuring respective hydraulic pressures of the nozzle and operations of a clamp in plural picking motions and indicating a frequency distribution thereof. CONSTITUTION:The hydraulic pressure of a nozzle during picking motion of a pick is detected by a small-sized pressure sensor equipped at the just fore part of the nozzle 19 and the opening and closing action of a clamp 20 is detected by a contactless switch equipped at the above part of the clamp. The hydraulic pressures of the nozzle and the opening and closing action of the clump in plural picking motions are detected in relation to a crank angle and recorded. A table of frequency distribution about designated inspection items is made up and indicated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention is a water jet loom (hereinafter referred to as rWJLJ).
It is abbreviated as. This invention relates to a diagnostic device used to detect abnormalities, poor adjustment, or poor maintenance in the weft insertion mechanism of (1).

(Conventional technology) WJL speeds are increasing year by year, and even in actual weaving factories, the speed is 8QOr,
In order to efficiently operate such high-speed looms as a group, a loom management system is being introduced.

(Problem to be solved by the invention) However, although conventional loom management systems are effective in obtaining statistical data on the operating rate of looms and the quality of textiles, However, it has been impossible to obtain data regarding the condition of each part of the loom, the quality of adjustment and maintenance, etc., which are the prerequisites for the operating rate and quality.

In WJL, the weft yarn is conveyed by jetting water, and at this time, it must be designed and adjusted so that the necessary and sufficient conveying force is applied to the weft yarn at an appropriate timing. However, at present, more than 60% of WJLO stoppages are due to poor weft flight, such as dead ends and tangled ends.

Poor weft flight occurs due to a complex interaction of weft insertion conditions such as water pressure, water volume, and injection timing. Inconsistency in these weft insertion conditions can be caused by abnormalities or adjustments in the weft insertion mechanism such as the pump or nozzle. This is thought to be caused by a defect. In weaving factories, the weft insertion mechanism is adjusted according to the type of yarn, the reed width of the loom, the rotation speed, etc., but the reality is that these adjustments and the maintenance of mm are done based on experience and intuition. Currently, setup work takes a long time, and it is not possible to objectively judge whether or not adjustments have been made accurately.

Therefore, in the present invention, it is possible to adjust and maintain the loom by objectively determining the operating status of pumps, nozzles, etc., adjustment status of various operation timings, etc., especially for the weft insertion mechanism where the weft stoppage occurs frequently. The task is to make it so that
The objective is to obtain a diagnostic device that can obtain various data necessary for the determination.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a sensor 1 (la, lb) for detecting water pressure of the nozzle 19 and a clamper 20.
and sensors 2 (2a, 2b) for detecting the motion of
means 5 for reading the detected values of the sensors 1 and 2 at a predetermined angle of the crankshaft at each pick, for example every 1 degree of crank angle; and a means 5 for storing the detected values over a plurality of picks sufficient for statistical processing. A diagnostic apparatus for a weft insertion mechanism of a water jet loom is proposed, which comprises means 6 and means 7.8 for creating and displaying a frequency distribution table for specified inspection items from these stored values.

(Function) When the WJL is operated with the diagnostic device installed, changes in nozzle water pressure and clamper operation for multiple picks are detected and recorded in relation to the crank angle. From this detection data, the maximum value Pm of nozzle water pressure, the nozzle water pressure Pco at the time of clamper opening start, the momentum of the jetted water,
That is, the value A obtained by integrating the nozzle water pressure by the crank angle and dividing by the rotation speed, the crank angle θ-3 at the start of water injection, the water injection period θW expressed in crank angle, and the clamper oven starting angle θ.
It is possible to obtain statistical data on inspection items such as co, clamper open angle θC, etc. from multiple picks. The obtained data reflects the condition of the weft insertion mechanism of the WJL, and by analyzing this data, as shown in the example below, abnormalities and maladjusted areas inherent in the weft insertion mechanism of the loom can be found. be able to.

(Embodiment) The figures are diagrams showing one embodiment of the present invention, in which Fig. 1 is a complaint correspondence diagram, Fig. 2 is a block diagram of the device, Fig. 3 is a flowchart showing the operation of the device, and Fig. 4 is a diagram showing an embodiment of the present invention. FIG. 3 is a diagram showing an outline of a weft insertion mechanism.

In FIG. 4, due to the rotation of the pump cam 11, the plunger 15 is pulled out from the plunger pump 14 via the cam roller 12 and the bell crank 13, and the plunger 15 is pulled out from the water tank 16.
Water is sucked into the pump 14 from the pump spring 1
7 is compressed. At the moment when the cam 11 reaches its maximum lift, the plunger 15 is opened, and the restoring force of the compressed spring 17 forces out the water in the pump 14. The pushed out water passes through the water conduit 18 and is ejected from the nozzle 19, and the clamper 20 is opened and the weft yarn 2 that has been stored is
1 is transported by a jet of water. Then, at a timing after the water injection ends, the clamper 20 closes, and the cam 11 starts pulling out the plunger 15 for the next water injection. The nozzle water pressure during this pick weft insertion operation is:
It is detected by a small strain gauge type pressure sensor 1 installed just before the nozzle 19, and the opening/closing operation of the clamper is detected by the clamper 2.
It is detected by the proximity switch Z switch 2 installed above 0.

As shown in FIG. 2, pressure sensor l and proximity switch 2
Two nozzle looms are provided to enable diagnosis of a two-nozzle loom. Signals from the pressure sensors 1a and 1b pass through amplifiers 31a and 31b and an A/D converter 32, and are sent to the CPU 33 at every timing commanded by the angle controller 4.
is input.

The on/off signals from the proximity switches 2a, 2b are input to the CPU 33 via the interrupt controller 34, and at the same time, the crank angle indicated by the angle controller 4 is read and input to the CPU 33.

When these signals for one pick are input, they are sequentially stored in the data memory 5.

The on/off signal from the timing sensor 3, which operates every revolution of the crankshaft, is input to the CPU 33 via the interrupt controller 34 with priority over other signals, and the contents (crank angle) of the angle controller 4 are cleared by this signal. . When the driving sensor 35 detects the stoppage of the WJL or when the predetermined number of picks is reached, the acquisition of each signal is finished. The timing sensor 3 is WJ
The timing switch for the L feeler can be used, the driving sensor 35 can use the WJL main motor magnet switch, and the angle controller 4 can use the timer interrupt function of the CPU 33.

After completing acquisition of each detection signal, the display 36
The CPU 33 calculates the data stored in the data memory 6 by operating the keypad 37 during interaction with the CPU 33, and the result is sent to the
Display it on the CRT 36 via the RT controller 38, or
It is output to the printer 40 via the input/output interface 39.

In the flowchart of FIG. 3, in the data acquisition condition setting step 51, data acquisition conditions such as the number of picks to be measured and analyzed, the specifications of the pressure sensors la and 1b to be used and the proximity switches 2a and 2b are set through dialogue with the operator. Set. What conditions should be set at this time depends on the contents of the data acquisition program, taking into account the versatility of the device. If two nozzles are specified, synchronization with WJL is performed in steps 52 and 53 to acquire data from the first nozzle.

Next, in steps 54 to 57, data for one pink is captured, but during this time, when a stop command is given (step 55) or when there is a stop (step 5), data for one pink is captured.
In step 6), the process moves to output setting step 60, which will be described later. Data for one pink is captured every 1 degree of crank angle, and in step 58, the number of pinks for which data capture has been completed is counted, and when the set number of picks is reached, the process moves from step 59 to output setting step 60.

In the output setting step 60, inspection items for which a frequency distribution table is to be created are specified through interaction with the operator. Of course, it is also possible to adopt a configuration in which such a designation is not made and a frequency distribution table for all recorded test items is output. Examples of inspection items for creating a frequency distribution table are described in the section on effects above. If the inspection items are specified, step 6
The data tα written in step 1 is extracted and calculated, and the results are output in the form of a graph and calculated values (step 62). The frequency distribution of these inspection items will fall within a small variation range if there are no defective parts on the loom and each part is adjusted accurately.

Figures 5 to 11 show a very well-managed one nozzle W that continuously woven nylon taffeta with a warp and weft of 70 denier for 20 days, stopped four times, and had an operating rate of over 99.9%.
Maximum nozzle water pressure Pm (Fig. 5) at JL (fluency 145 cm, rotation speed 505 r, p-Month), nozzle water pressure Pco at the start of the clamper oven (Fig. 6), movement tA of the jetted water
(Fig. 7), water injection start angle θws (Fig. 8), water injection angle θW (Fig. 9), clamper oven start angle θ
Fig. 10 shows actual measured values of histograms of co (Fig. 10) and clamper oven angle θC (Fig. 11).

The frequency in each figure is 15 times the data for 2000 picks.
It is classified into 0 classes and shown by the frequency of appearance for each class.

On the other hand, FIG. 12 is an example of a histogram of the maximum nozzle water pressure Pm of a loom in which the pump drive system is worn, and a considerable variation is observed. Also, Fig. 13 (a), (b
) is an example of a histogram when there is a misadjustment of the clamper mechanism in WJL over two nozzles. From this histogram, it is easy to see that the clamper open start angles θco on the first nozzle side and the second nozzle side do not match. It is estimated that Furthermore, the example in Figure 14 shows the maximum nozzle water pressure P in a two-nozzle loom in which nozzle bodies with different structures are mistakenly attached to the first and second nozzles of the two-nozzle loom.
m (7) This shows an example of histogram output.

(Effects of the Invention) As described above, by measuring the nozzle water pressure and clamper operation at multiple picks using the diagnostic device of the present invention and examining the frequency distribution, WJ
It is possible to predict the presence of abnormalities or poorly adjusted parts in the weft insertion mechanism of the L, and by taking appropriate measures, it is possible to operate the WJL more stably and efficiently, and also to check whether the adjustment during operation is correct or not. This also makes it possible to objectively understand the situation, which has the effect of allowing group management of high-speed looms to be performed more accurately and in a shorter time.

[Brief explanation of drawings]

The figures are diagrams showing one embodiment of the present invention, in which Fig. 1 is a diagram corresponding to claims, Fig. 2 is a block diagram of the device of the present invention, Fig. 3 is an operation flowchart, and Fig. 4 is a schematic diagram of the weft insertion mechanism. Figures 5 to 14 are diagrams showing examples of frequency distribution tables output from the device of the present invention. Figure 14 is an example of a loom with abnormalities or maladjusted parts. In the figure, 1 (la, lb): Pressure sensor 2 (2a, 2b)
: Proximity switch 3: Timing sensor 4: Angle controller 6: Data memory 19: Nozzle 20: Clamper 33: CPUPm: Maximum value of nozzle water pressure Pco: Nozzle water pressure at the start of clamper opening A: Momentum of jetted water θ-3: Water Crank angle at the start of injection θW: Water injection period expressed in crank angle θCO: Clamper open start angle θC: Clamber oven angle Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Book 8 Figure 9 Figure 10 Figure 11 No changes to the contents of the drawings) Figure 12 Figure 13 (a) Figure 131zζ (b) Figure 14 Indication: Japanese Patent Application No. 63-258105 2, Title of the Invention Diagnosis Device for Weft Insertion Mechanism 3, Relationship with the case of the person making the amendment Patent Applicant Address: O1-4, Tomi-cho, Kanazawa City, Ishikawa Prefecture Date of Amendment Order: Showa January 6, 1964 (Shipped on January 31, 1999) 5. Subject of amendment Figure 12 of the drawing 6. Details of the amendment As shown in the engraving and attached sheet of the drawing originally attached to the application (no change in content)

Claims (1)

[Claims] It is equipped with a sensor (1) for detecting the water pressure of the weft insertion nozzle (19) and a sensor (2) for detecting the operation of the clamper (20), and detects the detected values of the sensors (1) and (2) on the crankshaft at each pick. Means (5), (6) for reading at each predetermined angle and storing the detected values over a plurality of picks, and means (7), (7) for creating and displaying a frequency distribution table for specified inspection items from these stored values. 8) A diagnostic device for a weft insertion mechanism of a water jet loom, comprising: