JPS59216955A - Weft yarn detector of fluid jet type loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Prior Art) The present invention relates to a weft yarn detection device for detecting the presence or absence of an inserted weft yarn in L12 of a fluid jet loom.

(Prior art) As this type of cotton thread detection device, for example, Japanese Patent Publication No. 57-1
No. 3653 is conventionally known. This is done by setting the gap between the light emitting and receiving parts of the detector to less than 2.0 degrees, and using surface tension to retain water in the gap between the light emitting and receiving parts.
This is to prevent false detection by the weft detection device.

However, since the gap where the light emitting and receiving part of this device is located is open on the reed side and both sides, after the weft caught by the weft end catching thread is cut by the cutter, the weft thread is further cut by the twisting action of the weft end catching thread. When the weft yarn is swung around, the swung weft cut end yarn may enter the gap in the detector, causing false detection.

(Objective) It is an object of the present invention to eliminate false detections caused by the weft cut end thread being swung around by the weft end catching thread entering the gap of the detector.

(m-formation) The present invention has been made to achieve the above-mentioned object, and includes an upper member and a lower member arranged side by side with a predetermined gap in the vertical direction, and a weft thread attached to one or both of these upper and lower members. In a weft detecting device for a fluid jet loom, the weft detecting device is provided with a detecting means, and the weft detecting device is disposed between a woven fabric and a weft end capturing yarn, wherein at least the gap between the upper and lower members is A cover covering the gap is disposed on the weft end catching side with a slight gap from the side surface of the upper and lower members when viewed from the weft end catching side.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a reed of a fluid jet loom, 2 is a water jet nozzle for inserting the weft, 3 is a warp, 4 is a weft, 5 is a loom, 6 is a woven fabric, 7 is a weft end catching thread, 8 (see Figure 2) ) is a spindle for false twisting the weft end catching yarn 7, and 9 is a cutter for cutting the wall yarn. 10 (see Figure 1) is the left and right frame of #1 aircraft (
The temple bar 11 (not shown) is a bracket fixed to the temple bar 10 with a clamping piece 12 and a bolt 13.

Reference numeral 14 denotes a weft yarn detector according to the present invention, which is placed between the weft end catching yarn 7 that goes to the bracket 1 via 11 and the heat cutter 9 that is placed close to the edge of the woven fabric 6; At the same time, as shown in Fig. 3, the ? l reed 1
Arrange it so that it protrudes slightly. Therefore, the liquid state 1a of the formation 1 is detected by the weft yarn detector 1 as shown in FIGS. 1 and 2.
A space S is formed at the opposite position of 4.

As shown in detail in FIGS. 3 to 5, the weft detector 14 connects an upper member 15 made of a rectangular bar-shaped block and a lower member 16 shaped like a rectangular plate at a predetermined gap in the vertical direction. A (approximately 2nd edition) will be placed side by side. That is, upper and lower U 15,1
Insert a spacer 17 into the reed side between holes 1 to 18 to connect the upper and lower members 15 and 16 together, and then
The cutout groove 15a provided on the opposite side of the bracket 15 is inserted into the bracket 1~
11 and screwing the screw 19 into the upper member 15 fixes the detector 14 in a predetermined position.

In addition, the gap A provided on the reed side of the upper and lower members 15 and 16 is set to a level that allows the inserted weft yarn 4 to enter the gap A during the reed beating process, and the gap A through which the weft yarn 4 that has entered the weft passes through.
A weft detection means is provided on the upper and lower opposing surfaces of the weft yarn.

That is, an optical fiber 20 connected to a light emitter (not shown) is attached to the lower member 15, and its end face is exposed on the upper surface of the gap A, and a light receiver (not shown) is attached to the lower member 15.
The optical fiber 21 connected to the optical fiber 21 is attached to the lower member 16, and its end surface is exposed on the lower surface of the gap A facing the end surface of the optical fiber 20. Note 2
2 is a water discharge port formed around the end of the A butical fiber 20, and 23 is a water conduit provided at an angle in the upper member 15 so as to communicate with this discharge port 22; 23 is connected to, for example, a water pipe via a connecting pipe 24 and a garlic pipe 25. Note that the weft yarn detection means may be of any other type, such as one that detects light reflected from the weft yarns.

In addition, as shown by the two-dot chain line in Fig. 3, the reed 1 that has been beaten
A notch 15b is provided in the upper member 15 at the upper part of the upper member 15 at a position where the weft 4 pushed in by the weft stops, and a step part 15c for weft locking that is substantially perpendicular to this optical fiber side is formed.

Further, at the tip of the upper member 15, there is provided a weft thread which is inclined obliquely upward from the open end of the gap Δ toward the reed 1 side shown in FIG.
An upper guide plate 26 is fixedly provided with screws 27, and a vertical plate type lower guide plate has a guide surface 28a that slopes obliquely downward from the base of the upper guide plate 26 toward the reed 1 side shown in FIG. 28 are provided on both left and right sides of the lower member 16,
The horizontal upper edge 28b of this lower guide plate 28 is connected to the upper member 1.
A gap B (see FIGS. 4 and 5) is provided between the upper edge 28b and the side surface of the upper member 15 to allow the weft 4 to enter. A step portion 28b is formed at a position facing the step portion 15c provided on the side member 15. Reference numeral 28c is a connecting plate portion that connects the left and right lower guide plates 28, and 29 is a screw that fixes the connecting plate portion 28c to the lower surface of the lower member 16. Therefore, in this embodiment, the left and right lower guide plates 28 are integrally formed with a cross-sectional shape (see FIG. 5) via a connecting plate portion 28c. However, this lower guide plate 28 does not necessarily need to be provided on both the left and right sides, and may be provided at least on the weft end catching yarn 7 side.

(Operation) Next, the operation of the apparatus of the present invention described above will be explained. The weft 4 is inserted into the warp 6M mouth by the weft insertion injection nozzle 2.
is inserted, and when the reed 1 moves toward the fabric front 5 in the following reed beating process, the end of the weft 4 touches the upper guide plate 2.
6 and into the opening C of the lower guide plate 28, the weft yarn 4 is further pushed out through the gaps A and B to the empty space of the notch 15b in a bent state as shown in FIG. in this case,
While the weft yarn 4 passes through the gap A, it blocks the opposing surfaces of the optical fibers 20 and 21, so weft yarn detection can be performed by detecting this optical path interruption.

After beating the reed, the reed 1 moves back, but the weft 4 in the notch 15b
Even if you try to move backwards, the stepped portion 15c.

Since it is locked by 28b, it will not move backward.

Furthermore, since the weft yarn 4 captured by the weft end capturing yarn 7 is then cut by the heat cutter 9, the cut weft yarn 4 advances together with the woven fabric 6 while being swung around by the twisting action of the capturing yarn 7. In this case, since the detection gap of the conventional weft yarn detection device was open to the reed side and both sides thereof, it was often swung around and the cut yarn 7j entered the detection gap, causing false detection. However, in the present invention, both the reed side of the detection gap A and both sides thereof,
Since it is covered by the lower guide plate 28 and the upper guide plate 26, there is no possibility that the cut thread taken around by the catching thread 7 or the cut thread on the L[ side of the woven fabric 6 will enter the detection gap A. Therefore, according to the device of the present invention, false detection can be reliably prevented. Note that the length of the cut yarn protruding from the edge side of the woven fabric 6 is short, and the end of the cut weft yarn 4 enters into the detection gap A. 13 If there is no such device, it is sufficient to provide the lower guide plate 28 only on the captured thread 7 side.

Further, the angle of the introduction opening C between the upper guide plate 26 and the lower guide plate 28 is preferably formed in accordance with the angle of the warp opening. Further, it is convenient if the upper guide plate 26 is made of a thin plate so that the operator can easily change the angle according to the warp shedding.

(Effects) Since the device of the present invention is as described above, it has the effect that it is possible to prevent false detection caused by the weft cut end yarn being swung around by the weft end capturing yarn entering the detection gap of the detector. is obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a part of a fluid injection type loom equipped with the device of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a longitudinal sectional view of the device of the present invention, and Fig. 4 is a plan view thereof. FIG. 5 is a view taken along arrow D in FIG. 1... Reed 2... Water injection nozzle for weft insertion 3... Warp 4... Weft 5... Woven @ 6... Woven fabric 7... Weft end catching yarn
14... Weft detector 15... Upper member 16
...lower member 26...upper guide plate 28...
Lower guide plates A, B...gap

Claims (1)

[Claims] 1. The upper member 15 and the lower member 16 are arranged side by side with a predetermined gap A in the vertical direction, and one or both of these upper and lower members 15 and 16 is provided with a weft 4 detection means to detect the weft thread detector 14. The weft detector 14 is arranged between the woven fabric 6 and the weft end catching yarn 7 at least on the weft end catching yarn 7 side of the gap A between the upper and lower parts 15.16. , when viewed from the weft end catching yarn 7 side, a lower guide plate 28 is disposed as a cover to cover the gap A between the upper and lower members 15 and 16 with a slight gap B between the side surfaces of the upper and lower members 15 and 16. Weft detection device for Type R machine.