JPH0583652B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a device for detecting defects in a row of reed blades in an air-injection loom, and more specifically, a device for detecting defects in a row of reed blades in an air injection loom. The present invention relates to a device for detecting a defective part of the reed blade row, which is attached to a loom which has a groove, guides an airflow ejected from an auxiliary nozzle through the air guide groove, and performs weft insertion using the guided airflow.

(Background Art of the Invention) First, an example of the main parts of the loom will be explained with reference to FIG.

In the drawing, 1 is a reed, 2 and 3 are an upper frame and a lower frame of this reed, respectively, and 4 is a reed blade arranged firmly fixed to these upper and lower frames. Reed feather 4
4a is a straight main body part, 4b is a chevron-shaped part protruding forward from this main body part, 4c is a recess formed at the top of this chevron-shaped part, and 4d is a reed striking surface forming the bottom of this recess. The row of recesses 4c constitutes an air guide groove 6 extending in the weft direction.

This reed 1 is fixed to a reed holder 7 by its lower frame 3, and a T-slot 8 extending in the weft insertion direction is formed in this reed holder, and the position of a plurality of auxiliary nozzles 9 can be adjusted using this T-slot. It is arranged.

The auxiliary nozzle 9 has an injection port disposed near the lower edge of the air guide groove 6 and injects air diagonally upward toward the weft entry side into the guide groove. Part of this jet airflow escapes from between the reed blades 4 to the back of the reed 1, so that the entire airflow is drawn into the air guide groove and guided to the opposite side of the weft entry side. The tips of the weft yarns ejected from the main nozzle are successively blown into the guided airflow and inserted into the weft.

(Problem) However, the above-mentioned loom has a problem in that the guiding effect of the air guiding groove deteriorates with the passage of time of use. The reason for this is as follows.

The main cause of periodic functional deterioration is dirt on the reed blades 4. In other words, although a purifier is installed in the feed path to supply clean air to the auxiliary nozzle 9, some amount of oil and water cannot be avoided, and on the other hand, the jet airflow is contaminated with floating particles such as fluff. Since it is easy to entrain dust, when this jet airflow escapes from the gap between the reed blades at a relatively low speed as described above, these foreign substances mix and cause the air flow to flow into the reed blades, especially the air guide grooves 6. This is because the airflow is attached near the airflow, which increases the escape resistance of the airflow.

Furthermore, the main causes of functional deterioration caused by long-term use are deformation of the reed blades; one is the wear and tear of the reed striking surface 4d that constitutes the bottom of the air guide groove; and the second is the collapse of the reed blades. This is a change in the gap between the reed blades.

When the above-mentioned defects slightly occur, the induction effect is subtly affected, but it is extremely difficult to visually identify these defects. Therefore, in the past, the entire reed was cleaned regularly or replaced based on intuition, but these maintenance tasks required a great deal of time and effort.

Therefore, an object of the present invention is to easily and reliably detect defective locations in the reed blade row.

(Means of the present invention) The means of the present invention that solves the above problems includes a carrier that can run in a direction along an air guide groove, an air injection nozzle carried by this carrier, and a flow rate of the air injected from the air injection nozzle. It has a flow velocity detector that detects the flow rate.

Furthermore, in addition to the above-mentioned structure, the means of the present invention is such that the carrier carries a cleaning means and the cleaning element faces the air guide groove.

(Function) According to the above means, the airflow ejected from the air ejection nozzle is guided by the air guide groove, and its guide area is accompanied by the carrier and moves in the direction along the air guide groove. Further, the flow velocity detector also moves along with the carrier while maintaining a constant relationship with the air jet nozzle to detect the flow velocity of the jetted air. Therefore, if there is a defect in the reed blade during this movement, the guidance function will change and the flow velocity distribution will become abnormal, so the defect can be recognized by looking at the detection results of the flow velocity detector.

Furthermore, in the case where the carrier carries a cleaning means, the air guide groove is cleaned by the cleaning element as the carrier runs, so it is difficult to determine whether the problem is mainly due to dirt or deformation of the reed blades. ,
can make judgments about

(Example) In FIG. 1, numeral 10 is a defect detection device having four rows of reed blades, and the outside is covered with a cover 11. The device 10 has a rail extending in the weft direction attached to the reed 1 or the reed holder 7, etc., and engages with the rail so that it can run, and in this embodiment, the upper frame 2 of the reed 1 is used as the rail. It is. Hereinafter, this upper frame will be referred to as the rail 2.

In FIGS. 2, 3, and 4, 20 is a carrier, 24 is a base of this carrier, and base 21 is formed of an upper plate 21a and a side plate 21b hanging down from the front side of this upper plate. 22, 22 are a pair of brackets attached to the lower surface of the upper plate 21a;
3 and 23 are running wheels, and 24 and 24 are side rollers. A pair of running wheels 23 and 23 are disposed behind each bracket 22 and supported by the bracket, and these are mounted on the upper surface of the rail 2. It is engaged. A pair of side rollers 24, 24 are supported on the upper ends of support shafts 25 (FIG. 3) hanging from each bracket 22 and engaged with the front surface of the rail 2. A press roller 26 is elastically engaged with the rear surface of the rail 2 and is disposed between the side rollers 24, 24, and its support structure is as follows.

Mainly uses Fig. 5 as well as Fig. 3, and 27 is the upper plate 2.
A bracket erected on the upper surface of 1a, 28 an arm extending rearward from this bracket, 29 a ball joint constructed at the tip of this arm, 3
Reference numeral 0 denotes a swing shaft that hangs down from the arm 28 to the lower part of the upper plate 21a via this ball joint.The press roller 26 is supported at the lower end of this swing shaft, and the shaft 30 is By applying the force forward, the press roller 26 is pressed against the rail 2. Reference numeral 32 denotes a bar for releasing this engagement, and as shown in FIG.
The proximal end is supported by a stud 33 hanging down from the shaft, and the free end thereof is opposed to the front side of the swing shaft 30. Further, in FIG. 4, reference numeral 34 denotes an operating lever, the middle part of which is supported on a stud 35 projecting downward from the top plate 21a, the rear end of which is bent as shown in FIG. It is placed close to the front side of 32. Therefore, when the operating lever 34 is rotated counterclockwise in FIG. 4, the swing shaft 30 is rotated rearward via the bar 32, and the press roller 26 is separated from the rail 2.

Mainly using FIG. 3, 40 is a traveling drive means of the carrier 20, 41 is a reversible geared motor fixed on the upper plate 21a, 41a is its output shaft, and 42 is fixed to this output shaft. cutlet spring,
43 is a drive roller fastened to this coupling. The drive roller consists of a hub 43a and a tire 43b made of an elastic material such as rubber, which is arranged between the side rollers 24 and 24 to apply an appropriate elastic contact force to the front surface of the rail 2 as shown in FIG. Twist and engage.

As is clear from the above configuration, the carrier 20
Since the center of gravity of the carrier is located in front of the traveling wheel 23, the carrier tends to tilt forward.
Mainly, reference numerals 50 and 50 in FIG. 3 are posture holding means for suppressing this tilting and keeping the above-mentioned engaged posture of the carrier 20 constant. In these means, reference numeral 51 denotes a restraining roller, the peripheral portion of which is formed of a tire 51a made of an elastic material such as rubber, and the restraining roller is connected to the lower end of the support shafts 25, 25 of the pair of side rollers 24, 24. It is supported through sleeves 52, 52, and, as shown in FIG. 2, is engaged with the front surfaces of four rows of reed blades to suppress the above-mentioned tilting movement.

Mainly using FIGS. 2 and 3, 55 is an air jet nozzle structure, 56 is its base, 57 is an air jet nozzle attached to this base, 57a is its jet port, and 58 is an air jet nozzle 57. This is an air hose for supplying pressurized air. Then, the weft-side end of the side plate 21b of the carrier base is bent and extended downward, and the base body 56 is attached to this extended part 21b' so that the tip of the air jet nozzle 57 faces the front side of the air guide groove 6. The ejection port 57a at the tip is directed toward the inside of the air guide groove and diagonally to the weft entry side. As a result, the airflow ejected from the ejection port 57a is guided to the air guide groove 6 and guided to the opposite side of weft entry.

Using Figure 6 in addition to Figures 2 to 4, 60
is a pitot tube type flow rate detector, 61 is a pitot tube, 62 is a holder for this pitot tube, 63 is a flow rate detection unit fixed to this holder, and this flow rate detection unit converts flow rate (pressure) to electric quantity. Built-in element. 6
Reference numeral 4 denotes a clamper that holds the holder 62. This clamper is attached to the side plate 21b of the carrier base via an L-shaped bracket 65, and in this state, the end of the pitot tube 61, that is, the flow velocity detection part 61a, is attached to the side plate 21b of the carrier base.
are placed in the air guide groove 6 as shown in FIG.
Moreover, as shown in FIG. 3, it is directed toward the jet port 57a of the air jet nozzle 57. As a result, the flow velocity of the ejected airflow from the ejection port 57a guided as described above is detected by the flow velocity detection section 61a, and the flow velocity detection section 63 outputs an electric quantity signal according to the detected value.

Using Figures 3 and 7, 70 is the carrier 2.
This is a position detector for detecting the running position of 0. In the detector 70, reference numeral 71 denotes a light emitting/receiving coaxial type optical fiber. This optical fiber is housed in a sleeve 72 and clamped by a clumper 73, and the clumper is connected to the carrier base 21 via an L-shaped bracket 74.
The light emitting/receiving part 71a at the tip of the optical fiber 71 is arranged in a part that can face the auxiliary nozzle 9, and as shown in FIG. be. Thereby, when the flow velocity detection section 61a passes the auxiliary nozzle 9, the position detector 70 can detect the presence of the nozzle 9 based on the change in the amount of received light.

3 and 8, 80 is a cleaning means. In the means 80, 81 is a rotating brush as a cleaning element, 82 is a motor for driving the rotation, and the motor 82 is connected to the opposite end surface of the cover 11 of the carrier 20 through an L-shaped bracket 83. It is installed. The lower part of the rotating brush 81 faces the air guide groove 6 and can be engaged therein, and the upper part thereof is formed in the shape of a groove wheel as a whole so that it can also engage with the upper half of the row of chevron portions 4b of the reed blade 4. Due to this shape, it is possible to clean not only the inside of the air guide groove 6 but also the dirt on the upper half of the chevron-shaped portion caused by the jet air flow directed diagonally upward and toward the opposite weft entry side of the auxiliary nozzle 9. Note that this cleaning means may be replaced by an air injection type blow-off type or the like.

In FIGS. 2 to 4, reference numeral 53 denotes a weight that also serves as a handle, and is attached to the upper plate 21a of the carrier base behind the traveling wheels 23, 23. This weight includes an air jet nozzle 55, a flow velocity detector 70,
This adjusts the center of gravity of the carrier 20 by offsetting the weight of the cleaning means 80, etc., and the hoses, cables, etc. connected thereto, and thereby prevents excessive bending loads from the holding rollers 51 to the reed blades 4. I try not to add.

The embodiment is as described above, and the running wheels 23, 23 are placed on the rail 2, and the operating lever 34 is
When the press roller 26 is pressed against the rail, the carrier 20 engages with the rail 2 via these foils, rollers, and side rollers 24, 24, and presses the press roller 5 with the assistance of the weight 53.
1 and 51 keep this engaged posture constant. When air is ejected from the air ejection nozzle 57 and the reversible geared motor 41 is started to rotate the drive roller 43 in the forward or reverse direction, the carrier 20 runs in the desired direction in the weft insertion direction, and the flow speed increases. The detector 60 moves while detecting the flow velocity of the ejected airflow, and the position detector 70 detects the presence of the detection portion 61a each time the detection portion 61a passes the auxiliary nozzle 9.

FIG. 9 shows an example of the above-mentioned malfunction location recognition device. In this recognition device 90, 91
92 is an amplifier for amplifying the electric quantity signal of the flow velocity detection section 63 in the flow velocity detector 60; 92 is a converter for converting the change in the amount of light received by the optical fiber 71 in the position detector 70 into a change in the quantity of electricity; 93; 94 is an analog recorder that records the outputs of these amplifiers 91 and 93.

FIG. 10 shows an example of the record of the analog recorder 94, where V is the output of the amplifier 91, that is, a flow velocity curve showing changes in flow velocity, and _P1 to Pn are the outputs of the amplifier 93, that is, the auxiliary This is a position mark indicating the arrangement position of the nozzle 9 or the position on the movement path of the flow velocity detection section 61a.

To explain an example of the use of the embodiment, first, a flow velocity curve V is recorded for a well-maintained reed, and this is saved as a normal curve. Thereafter, the flow velocity curve V is recorded at appropriate times while the loom is in operation.
In this recording, for example, if an abnormal curve V' as shown by a chain double-dashed line is observed in the section between position marks P ₃ to _{P 5} , it can be seen that there is a problem in this section. Therefore, the section is inspected intensively and measures such as cleaning are taken, or the records are re-collected while the cleaning means 80 is operated. In this latter case, if the abnormal curve V' approaches the normal curve V, it can be determined that the cause of the abnormality was dirt, so more careful cleaning is performed, and if the abnormality still appears, the cause is determined. Since we can determine that the blade is deformed, we will repair or replace the reed.

Returning to FIG. 9, 95 is an A/D converter that digitally converts the output of the amplifier 91, and 96 is an integrator that integrates the output of this A/D converter.
6 has, for example, _a flip-flop circuit and an integrating circuit, and integrates the output corresponding to a range of water head pressure of 300 mmAg or more (Fig. 10) for each section such as P _{1 to} P ₂ , P 2 to P 3 , etc. and inputs this to the comparison circuit 97.
Reference numeral 98 denotes a reference value generator that stores the integrated value corresponding to the above range for the reference curve V, and inputs the value to the comparator 97 every time the above interval ends. The comparator 97 compares the input value from the integrator 97 and the input value from the reference value generator 98, and issues an abnormal signal when the difference exceeds a predetermined value.

Reference numeral 99 indicates warning means such as a warning light or a buzzer that lights up or sounds in response to the abnormal signal, and the inspection worker marks the section where this warning means is activated on the reed frame or the like. Further, 100 is a normally closed relay circuit which is activated in response to the abnormality signal, and this relay circuit cuts off the power to the geared motor 41 and stops the carrier 20. Therefore, it can be recognized that there is a problem with this stopping position.

Recognizing the location of a malfunction using the warning means or carrier stop means is convenient for on-site work.
Also in each of the above cases, by using the cleaning means 80 in combination, the treatment can be carried out appropriately.

(Effects) As explained above, according to the present invention, it is possible to objectively grasp the defective location or cause of the defect in the reed blade row, thereby improving the efficiency of maintenance work such as inspection, repair, and replacement of the reed. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the main parts of a reed in which the present invention is implemented and the equipment of the present invention, and FIGS. 2 to 8 are drawings showing details of one embodiment of the present invention, Figure 2 is a partial cross-sectional end view of Figure 1;
The figure is a partially sectional side view of Figure 2, and Figure 4 is a side view of Figure 3.
5 is a sectional view taken along the - line in FIG. 3, FIG. 6 is a sectional view taken along the - line in FIG. 3, and FIG.
The figure is a cross-sectional view taken along the line shown in FIG. 3, FIG. 8 is an end view of FIG. 3, FIG. 3 is a graph illustrating records obtained with the device shown in the figure. 1... Reed, 2... Rail (upper frame of the reed), 4... Reed blade,
4c... recess, 6... air guide groove, 9... auxiliary nozzle,
10... Trouble point detection device, 20... Carrier, 2
3, 24 and 26... a traveling wheel, a side roller, and a press roller that engage with the rail 2, 4
0... Travel drive means, 60... Flow velocity detector, 61... Pitot tube, 61a... Flow velocity detection unit, 70... Position detector, 80... Cleaning means, 81... Cleaning element (rotating brush), 90... Malfunction location recognition device.

Claims (1)

[Scope of Claims] 1. An air guide groove is formed by a row of recesses formed on the front side of the reed blade, and while the air flow jetted from the auxiliary nozzle is guided by the air guide groove, the guided air flow is used to infuse the weft. An air injection system comprising: a carrier capable of traveling in a direction along the air guide groove of a loom; an air jet nozzle carried by the carrier; and a flow velocity detector that detects the flow velocity of the air jetted from the air jet nozzle. A defect detection device for reed blade rows in type looms. 2. The above-mentioned loom in which an air guide groove is formed by a row of recesses formed on the front side of the reed blade, and the jetted airflow of the auxiliary nozzle is guided by the air guide groove, and weft insertion is performed by the guided airflow. A carrier capable of traveling in a direction along an air guide groove, an air jet nozzle carried by the carrier, a flow velocity detector for detecting the flow velocity of the jet air from the air jet nozzle, and a cleaning means, the cleaning means A device for detecting defects in a row of reed blades in an air-injection type loom, which is configured with a cleaning element facing an air guide groove.