JPH0638131Y2 - Reed fixing device for shuttleless loom - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) In a conventional air-jet type shuttleless loom, a weft insertion guide is provided in front of the reed wing, and the air flow passage of the weft insertion guide is woven at once from the main nozzle. A method in which wefts fly to the end, a method in which a main nozzle and a sub-nozzle are provided, and the wefts sent by the main nozzles are successively jetted to the cloth end by air injection from the sub-nozzles Transformed to have a flight path of
There is a method in which the weft insertion path is made to approach as close as possible before weaving and the weft insertion path is made to fly.

(Prior Art) Conventionally, in such a weft-insertion type reed-wing fixing device as disclosed in, for example, JP-A-57-143544 and JP-B-60-97785, the weft thread correctly passes through the weft flight path. In order to detect whether or not the reed is detected, a detector such as a photoelectric tube is provided on the front surface of the reed, and the light is projected from this to the weft flight path of the reed deformed by the light projecting device, and is projected onto this reed. The light receiving device receives the reflection of the emitted light beam, and the light emitting and receiving device using a photoelectric tube detects whether or not the weft has passed, as a pulse signal, and when the weft does not pass, the loom base is stopped.

(Problems to be solved by the invention) In a weft detecting device that receives reflected light by a light emitting and receiving device using a photoelectric tube of a weft inserting device having such a deformed reed wing, the reflection on the reed surface is detected. The light is similar to the reflected light generated when the weft is present due to the vibration of the reed, and the weaving operation may be continued because the weft is present even though the weft is not present. Such a phenomenon similarly occurs in the transmission type weft detecting device.

(Means for Solving Problems) Therefore, in the present invention, a sub-member that presses the reed wing near the weft flying path at the weft detection position is fixed to the reed stopper and is provided. The wing pressing portion is made of an elastic material.

(Operation) As described above, the present invention is provided with a sub-member for pressing the reed wing near the weft flying passage at the weft detection position where the light emitting and receiving device is arranged, fixed to the reed stopper metal or the reed frame. Since the reed pressing portion of the feeding member is formed of an elastic material, the vibration that has conventionally been generated in the reed itself is mitigated to the extent that it does not affect weft detection,
The certainty of the weft detection action is ensured.

(Example) FIG.1, FIG.2, and FIG.3 which implemented this plan are demonstrated. (1) is a modified reed wing, (2) is a reed frame, (3) is a reed stopper, (4) is a reed frame, and the modified reed wing (1) group is a reed frame (4)
The reed frame (4) is arranged between them, and the upper and lower parts thereof are pressed by the reed stopper metal fittings (3) to form a reed, and the reed frame (4) is placed through the positioning metal fittings (9).
It is fixed to.

In addition, the modified reed wing (1) has two chevrons in the middle of its shape, a weft flight passage (5) is provided between the chevrons, a main nozzle (6) is provided at the end of the loom, and a reed sley is also provided. A sub-nozzle (7) is provided at a predetermined position of (2), the weft (8) is wefted into the weft flight passage (5) by the main nozzle (6), and is sequentially moved to the selvage side by the sub-nozzle (7). Let it fly. In such a reed wing (1), in order to detect whether or not the weft (8) is flying in the weft flying path (5), a light emitting / receiving device (10) by a photoelectric tube and a main nozzle (6) and the opposite side weave It is provided at any point on the edge.

Although the present invention has a configuration using such a photoelectric tube, the weft detecting device using the light emitting and receiving device (10) is likely to be greatly affected by the vibration of the deformed reed wing (1). For example, as shown in FIG. Since the signal wave due to the presence of the weft yarn is combined with the pulse signal due to the vibration of No. 1 to cause noise generation and lack of certainty in the detection of the weft yarn, this problem of the conventional device is solved.

In the present invention, as shown in FIG. 2 and FIG. 3, at the position where the light emitting and receiving device (10) is arranged, the secondary reed member (11) made of an elastic member or a combination of a rigid body and an elastic body is deformed. The wing (1) is fixed to the reed stopper metal fitting (3) at the upper end with a bolt, and the auxiliary member (11) is configured to press the deformed reed wing (1) near the weft flight passage (5), The generation of noise in the detection pulse signal due to the vibration of the modified reed blade (1) is prevented.

The sub-member (11) may be arranged on the cloth fell side as shown in FIGS. 3, 6, and 8 or may be arranged on the heddle frame side as shown in FIG. . Further, the fixing method of the sub-member (11) is not limited to the one fixed with bolts as shown in FIG. 3, but as shown in FIGS. It may be configured to be fastened together with the stopper (3). Further, the light emitting and receiving device (10) and the auxiliary member (11)
If and are connected and integrated, it becomes easy to move and adjust the light emitting and receiving device (10) depending on the weave width and the kind of the fabric.

In addition, if the part where the light from the light emitting and receiving device (10) hits is made the weft and the target color, the change in the reflected light amount of the light by the weft increases, so the malfunction prevention function of the weft detection device should be further improved. You can

(Effect of the Invention) Since the present invention is configured as described above, as shown in FIG. 5, it is possible to suppress the vibration of the reed blades near the weft detection position during the operation of the loom and obtain an accurate weft detection signal. Therefore, it is possible to eliminate the malfunction of the weft yarn detection device due to the influence of the reed wing vibration and improve the weft yarn detection function.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of the device of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a front view of a light emitting and receiving device, and FIG. 4 is a weft detection that appears when vibration of reed wing is not suppressed. FIG. 5 is a diagram showing a train of pulse signals, and FIG. 5 is a diagram showing a train of pulse signals that appear when the vibration of the reed is suppressed. Further, FIG. 6 is a side view in the case where the auxiliary member is provided on the weave front side of the modified reed wing, and FIG. 7 is a side view in which the auxiliary member is provided on the heddle frame side of the modified reed wing, and FIG. Shows a side view in the case where the light emitting and receiving device is connected to the auxiliary member to be integrated. 1 ... Deformed reed wing 3 ... Reed stopper metal 4 ... Reed frame 5 ... Weft flying path 8 ... Weft 10 ... Emitter / receiver 11 ... Sub-member

Claims (4)

[Scope of utility model registration request] 1. A shuttleless loom in which a light projecting and receiving device is arranged in the vicinity of a weft flight passage formed by deformation of a reed wing, and the weft is detected by projecting light into the same weft flight passage. A reed blade fixing device in a shuttleless loom, in which a sub-recess member for pressing reed blades near the weft detection passage at the weft detection position is fixed to a reed stopper and a reed pressing portion of the sub-recess member is formed of an elastic material. . 2. The reed fixing device for a shuttleless loom according to claim 1, wherein the sub-member is fixed by being fastened together with the reed. 3. A reed fixing device for a shuttleless loom according to claim 1, wherein sub-members are provided on the front side of the reed above and below the weft flight passage. 4. A reed fixing device for a shuttleless loom according to claim 1, wherein the auxiliary member is provided on the heald frame side of the reed wing.