JPS6321955A - Length measuring and storing apparatus of fluid jet type loom - Google Patents

Abstract

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

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a length measuring and storage device for a fluid jet loom, and more specifically, the present invention relates to a length measuring and storage device for a fluid jet loom. This invention relates to an improvement in a weft length measuring and storage device that winds and stores a weft yarn and unwinds it under the control of a locking pin.

(Prior art and its problems) The above-mentioned type of length measuring storage device does not require an auxiliary power source such as a blower to wind the weft yarn around the storage drum, and it has the following advantages: It has been widely used since it has the advantage of low rolling resistance. However, in the case of this type of length measurement storage device,
At the final stage of weft insertion, the weft thread is necessarily brought to a sudden stop from approximately the maximum speed of weft insertion by means of the locking pin, thereby completing the weft insertion. That is, the weft thread flies freely throughout the entire weft insertion process, and is stopped abruptly at the final stage to complete the weft insertion. When this sudden stop occurs, an extremely large tension is instantaneously applied to the weft thread, causing damage to the delicate weft thread and making it easy for the weft thread with low elongation to break.
In either case, it is undesirable because it causes a decrease in the quality of the fabric and a decrease in the operating rate of the m machine.

(Summary of the Invention) An object of the present invention is to improve fabric quality and loom operating rate by avoiding a shocking increase in weft thread tension when the weft thread is locked.

For this reason, in the present invention, a storage drum is constituted by two or more thread pieces arranged concentrically, and the storage drum, a yarn guide for winding, a locking bin, and a yarn thread for winding at a predetermined speed. By cooperating with a length measuring device that continuously feeds the weft yarn to a yarn guide for use in the weft, the weft yarn is moved from free flight to restrained flight in the final stage of weft insertion. It absorbs kinetic energy in two stages.

(Embodiment) Figures 1 to 4 show the length measurement storage device of this invention! An example is shown below. Note that the side facing the main nozzle (not shown) of this device is r.
The front side is called "j", and the side facing the yarn supplying body is called "r".

A main shaft 1 is rotatably supported within a case 3 fixed to a woven frame via a bearing 2.

A pulley 4 is attached to the rear end of the main shaft 1. Further, as shown in FIG. 4, a boot 923 is attached to the main shaft of the loom, and are operatively connected to each other by a belt 24 so as to rotate synchronously with the main shaft of the loom. An arm 5 is fixed near the front end of the main shaft 1, and a yarn guide tube 1o and a yarn guide 6 are supported at the outer end of the arm 5. A yarn guide tube 9 is provided in the main shaft 1 passing through it in the axial direction, and its front end communicates with the yarn guide tube 1o, and its rear end communicates with the yarn guide 8 attached to the rear end of the main shaft. are doing.

Further, in the vicinity of the yarn guide 8, a disk 25 and a roller 26 that is pressed against the disk 25 are provided. disc 2
5 is integrally constructed with a pulley 27 connected to the pulley 23 by a belt 24, and cooperates with a roller 26 to continuously move the weft yarn W from a yarn feeder 28 to a yarn guide 8 at a predetermined speed. It is configured to be sent out.

A disk-shaped holder 1 is attached to the front end of the main shaft 1 via a bearing 15.
6 is rotatably attached, and a plurality of permanent magnets 14 are embedded in the holder 16 on the circumference. Further, a plurality of hanging thread pieces 17 having a specific shape as described later are attached to the front surface thereof, and constitute a storage drum. Note that each of the hanging thread pieces 17 is movable and adjustable in the radial direction.

At the front end of the case 3, there is a cover 1 that surrounds the arm 5 and the holder 16 and diverges in a trumpet shape toward the front.
2 is fixed, and a permanent magnet 13 is embedded in the front end thereof opposite to the permanent magnet 14 on the holder 16.

That is, due to the magnetic attraction between the permanent magnets 13 and 14,
Even if the main shaft 1 rotates, the holder 16 and the thread piece 17 thereon remain stationary.

FIG. 3 shows the shape of the thread piece 17. This hanging thread piece 17 has a cylindrical weft thread storage section 19 at its front end, and a conical section 2o converging toward the front at its rear end.

A long groove 21 is formed toward the front in the storage portion 19 of at least one of the inner hanging pieces 17, and a locking bin 22 is provided opposite to this, and this locking bin 22 is connected to the loom. As the groove 21 rotates, it is driven by a cam or the like to move forward and backward with respect to the long groove 21.

Furthermore, at the end of horizontal insertion, the yarn guide 6 locks into the locking bin 22.
The timing of the movement is set so that the position coincides with the axial direction of the main shaft 1.

Next, the operation of the apparatus of the present invention will be explained with reference to FIGS. 5(A) to 5(D).

FIG. 5(A) shows the state immediately after the previous weft insertion is completed, and the yarn guide 6 is in the same position as the locking pin 22 as described above. At this time, the locking pin 22 has entered the long groove 21 of the thread hanging piece 17, and the weft thread W sent out from the disc 25 and the pressure roller 26 is stopped by this and the restrained flight is completed, and the next weft insertion is performed. In preparation for this, winding begins in the storage section 19. The effective diameter of the hanging thread piece 17 and the weft delivery speed of the length measuring device are set so that the length and tension of the weft thread W wound around the hanging thread piece 17 by the yarn guide 6 are appropriate. For example, length measuring devices 25 and 26 can be used to obtain an appropriate winding tension.
The weft feeding speed is set to be slightly slower than the winding speed of the yarn guide 60.

FIG. 5(B) shows a state in which the storage of the weft yarn W in the storage section 19 has further progressed, and the yarn guide 6 is connected to the disk 2.
5 and a pressing roller 26, the thread rotates around the thread piece 17 while being wound around a device section 19 comprising a pressure roller 26.

FIG. 5(C) shows that the locking pin 22 has exited from the long groove 21 of the hanging thread piece l7, and the weft thread W has been wound around the storage part l9.
This is the state in which the paper has been opened to the state where it can be unrolled and the weaving process has started. During this time, the yarn guide 6 continues to wind the black weft yarn W sent out from the length measuring device onto the storage section 19.

As the wefting progresses further and all the weft yarn W wound around the storage section 19 is unwound by the traction force of the main nozzle (not shown), the weft yarn W sent out from the length measuring device is directly from the yarn guide 6 without being wound around the storage section 19. drawn out. That is, the weft yarn W is fed at a speed equal to the speed at which the weft yarn W is fed out by the disk 25 and the pressure roller 26. This results in a so-called restrained flight condition. This restrained flying state is shown in FIG. 5(D). When shifting to this restrained flight, the weft insertion speed is reduced to a certain extent, so that a part of the kinetic energy of the weft yarn W and the weft insertion fluid attached to it is absorbed. The locking pin 22 enters into the long groove 21 of the thread piece l7 again after the yarn guide 6 has passed in order to weft the last one turn of the weft thread W. At the end of the weft insertion, the yarn guide 6 passes the position of the locking bin 22, and the weft yarn W is locked and cannot be fed out any further. When this weft insertion is completed, the remaining kinetic energy of the weft yarn W and the weft insertion fluid attached to it is absorbed.

According to the present invention, the deceleration and stopping of the weft thread W is divided into two stages, so that the peak tension that occurs when the weft thread is locked by the locking pin is relatively small, so that even delicate weft threads are not damaged or damaged. Since there is no cutting, there is no deterioration in the quality of the fabric, and the operating rate of the loom is also improved.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view showing one embodiment of the device of the present invention, Fig. 2 is a perspective view showing the main parts thereof, Fig. 3 is a sectional side view showing the shape of the hanging thread piece, and Fig. 4 The figure is a perspective view showing the entire device of this invention, and Figures 5 (A) to (D)
) is an explanatory diagram explaining the operation. 1... Main shaft 3... Case 5... Arm 6... Yarn guide 16... Holder 17... Thread piece 22... Locking bin
25... Disc 26... Pressure roller

Claims (1)

[Claims] The weft is wound around the storage drum by a yarn guide that continuously rotates around the storage drum in a stationary state, and the weft is movable forward and backward relative to the circumferential surface of the storage drum to lock and unwind the weft. A length measuring storage device of the type using a locking pin is provided with a length measuring device that continuously sends out the weft yarn from the yarn supply source to the yarn guide at a speed approximately equal to the winding speed of the yarn guide. The stop pin moves back to unwind the wound weft at the timing of starting wefting, advances after the yarn guide has passed to make one last rotation before the end of wefting, and at the end of wefting, A length measurement storage device for a fluid jet loom, characterized in that a yarn guide is set to be at the same position as a locking pin.