JPH0583653B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention comprises an air guide groove formed by a row of recesses arranged in the weft direction on the front side of a reed, and an auxiliary nozzle connected to the air guide groove. The present invention is directed to a type of loom that injects air for inserting the weft, and relates to a device that is attached to such a loom and detects the flow velocity distribution state of the jet air flow.

[Background of the Invention] As is known, the above-mentioned type of loom uses a main nozzle to eject the weft yarn, and auxiliary nozzles arranged along the air guide groove to inject air toward the guide groove. Weft insertion is performed by sequentially blowing the tips of the weft yarns toward the side opposite to weft insertion while guiding the ejected airflow through guide grooves.

Although this type of loom is suitable for wide weaving, etc., it has the disadvantage of high air consumption per unit weft length, so when designing and developing it, the guiding function of the air guiding groove was improved. In order to measure air economy, pitot tube type and other current meters are installed to experimentally understand the influence of the jet air flow.

However, since the airflows ejected from a plurality of auxiliary nozzles influence each other within the air guide groove, it has been extremely difficult to linearly analyze the airflow distribution state in the entire guide groove.

On the other hand, in a weaving factory, in order to find the functionally and economically optimal injection conditions according to the weaving conditions, the placement position and injection direction of the auxiliary nozzle, as well as the air supply pressure, etc. are adjusted to achieve the appropriate flow rate throughout the air guide groove. Adjustments are made to obtain this, but the reality is that this work relies on the intuition of experts.

SUMMARY OF THE INVENTION An object of the present invention is to linearly and easily detect the state of flow velocity distribution within the air guide groove for the entire guide groove.

[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, a flow velocity detector and an auxiliary nozzle carried by the carrier to detect the flow velocity of the injected air. and a position detector for detecting the position of.

[Function] According to the above means, the carrier carries the flow velocity detector and travels in the direction along the air guide groove, that is, in the weft insertion direction, so that the flow velocity detector is always at a fixed position with respect to the guide groove. Since the position of the auxiliary nozzle can be detected as the auxiliary nozzle moves in the weft insertion direction, the positional relationship between the auxiliary nozzle and the fixed position is known.
Therefore, it is possible to continuously and comprehensively grasp the state of the airflow at the fixed position in relation to the auxiliary nozzle.

[Example] FIG. 1 shows an example of the main parts of a loom to which the present invention is applied.

In the drawing, 1 is a reed, 2 and 3 are upper and lower frames of this reed, respectively, and 4 is a reed blade that is firmly fixed to these upper and lower frames and arranged closely. This reed blade 4 is called a modified reed blade, etc., and has a mountain-shaped protrusion at the front of the reed blade root body 4, a recess 5 formed at the top, and a row of reed reeds extending in the weft direction. It constitutes an air guide groove 6. Then, the reed 1 is fixed to a reed holder 7 by its lower frame 3, and this reed holder has a T extending in the weft insertion direction.
A groove 8 is formed, and a plurality of auxiliary nozzles 9 are arranged using this T groove so that their positions can be adjusted. The auxiliary nozzle 9 has an injection port disposed near the lower edge of the air guide groove 6 and injects air toward the guide groove obliquely to the weft entry side.

Reference numeral 10 denotes a flow velocity distribution detection device according to an embodiment of the present invention, which is covered with a cover 11 on the outside. In this flow velocity distribution detection device, a rail extending in the weft direction is attached to the reed 1 or the reed holder 7, and the reed is engaged with the rail so that it can travel.In addition, in this embodiment, the upper frame 2 of the reed is used as the rail. It is something. Hereinafter, this upper frame 2 will be referred to as a rail 2.

In FIGS. 2, 3 and 4, reference numeral 20 designates the base of the carrier 21, and the base 21 is formed by an upper plate 21a and a side plate 21b hanging down from the front side of the 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. Further, a pair of side rollers 24, 24 are supported on the upper ends of shafts 25 (FIG. 3) depending 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 erected thereon, and its free end 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.
0 rotates backward, and the press roller 26
distance from.

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, since the center of gravity of the carrier 20 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. 53 is a weight that also serves as a handle, and the traveling wheel 2
It is attached to the upper plate 21a at the rear of the rollers 3 and 23, thereby adjusting the position of the center of gravity of the carrier 20 to prevent large bending loads from being applied from the restraining rollers 51 to the reed blades 4.

6 is also used, 60 is a pitot tube type flow velocity detector, 61 is a pitot tube, 62 is a holder for this pitot tube, 63 is a flow velocity detection section fixed to this holder, and this flow velocity detection section is a flow velocity detector. (Pressure) - Built-in voltage conversion element. Reference numeral 64 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 tip of the pitot tube 61, that is, the flow velocity detection part 61a, is inserted into the air guide groove 6. Place it facing upstream of the jet stream (Fig. 3).

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 clamper 73. The clamper 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. Since the embodiment is as described above, when the traveling wheels 23, 23 are placed on the rail 2 and the operating lever 34 is operated to press the press roller 26 against the rail, the carrier 20 is moved between these wheels and rollers. It engages with the rail 2 via the side rollers 24, 24, and this engaged posture is maintained by the restraining rollers 51, 51. Here, when the reversible geared motor 41 is started and the drive roller 43 is rotated forward or reverse, the carrier 20 travels in a desired direction in the weft insertion direction, and the pitot tube type flow velocity detector carried by this carrier is detected. The detection part 61a is held at a predetermined position in the cross section of the air guide groove 6 and detects the air flow velocity in the part while moving. Then, the flow velocity detection section 63 converts this detected flow velocity value into a voltage and outputs it.
Further, the position detector 70 also moves along with the carrier, and the light emitting/receiving part 71a of the optical fiber is connected to the auxiliary nozzle 9.
Each time the nozzle 9 passes, the detector 70 detects the presence of the nozzle 9 based on the change in the amount of received light. Sho Carrier 2
Experimentally, it is appropriate that the traveling speed of 0 is approximately 80 cm per minute.

FIG. 8 shows an example of a recording device for recording the output of the flow velocity detection section 63 and the signal of the position detector 70. In this recording 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. 9 shows an example of the record of the recorder 94, in which the vertical axis shows the value obtained by converting the flow velocity into water head pressure, the arrow shows the downstream side (anti-weft entry side) of the jet air flow, and the carrier 20 was run in the direction of the arrow. V is amplifier 9
1 output, that is, a flow velocity curve showing the flow velocity change,
P1 to Pn are the output of the amplifier 93, that is, the arrangement position of the auxiliary nozzle 9, or the flow velocity detection part 61a
This is a position mark that indicates the position on the movement path of .

FIG. 10 shows another embodiment of the flow velocity detector 80, in which a plurality of pitot tubes 81, nine in this example, are housed in a sleeve tube 82 and a clamper 83 is installed.
In this state, the flow velocity detection part 81a at the tip of each pitot tube is arranged flush within the air guide path 6, and at the other end of each pitot tube, a connector having a built-in ultra-small flow velocity-voltage conversion element is connected. A dual flow rate detection section 84 is connected thereto.

According to this embodiment, the flow velocity distribution within one cross section of the air guide groove 6 can be grasped.

[Effect] As explained above, according to the present invention, the flow velocity distribution of the jet airflow can be grasped for the entire guide groove in correlation with the auxiliary nozzle, so the analysis results can be used as effective design materials, etc. Alternatively, spray conditions and the like can be appropriately and easily set for improving weaving.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view illustrating the main parts of a loom in which the present invention is implemented and the equipment of the present invention, and FIGS. 2 to 7 are drawings showing details of one embodiment of the present invention, Fig. 2 is a partially sectional end view of Fig. 1, Fig. 3 is a partially sectional side view of Fig. 2, Fig. 4 is a bottom view of Fig. 3, and Fig. 5 is a partially sectional end view of Fig. 3. 6 is a sectional view taken along the - line of FIG. 3, FIG. 7 is a sectional view taken along the - line of FIG. 3, and FIG. A block diagram of the recording apparatus, FIG. 9 is a graph illustrating the recording obtained with the apparatus of FIG. 8, and FIG. 10 is an end view of a main part showing another embodiment. 1... Reed, 2... Rail (upper frame of the reed), 4... Reed blade,
5... recess, 6... air guide groove, 9... auxiliary nozzle, 1
0...Flow velocity distribution detection device, 20...Carrier, 23,
24, 26... Traveling foil side roller press roller as engagement means, 40... Traveling drive means, 5
0... Attitude holding means, 51... Holding roller, 53... Weight, 60, 80... Flow velocity detector, 61, 81... Pitot tube, 61a, 81a... Flow velocity detection section, 70... Position detector.

Claims (1)

[Claims] 1. An air guide groove is formed by a row of recesses arranged in the weft insertion direction on the front side of the reed, and air is injected from an auxiliary nozzle toward the air guide groove along the air guide groove of a loom that performs weft insertion. Flow velocity distribution detection of injected air flow in an air injection loom equipped with a carrier that can run in the vertical direction, a flow velocity detector carried by the carrier to detect the flow velocity of the injected air, and a position detector to detect the position of the auxiliary nozzle. Device.