JPS61296145A - Weft yarn length-measuring and storing apparatus of 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 (Field of Industrial Application) The present invention relates to a weft length measurement and storage device for m-machines that measures and stores weft yarns by winding them around a rotating drum.

(Prior art) As a conventional device of this type, for example, Japanese Patent Application Laid-Open No. 54-777
There is one disclosed in Publication No. 62. That is, in this conventional device, one locking body protrudes from the circumferential surface of a rotating drum rotating at a predetermined speed at a predetermined timing to lock the weft yarn, and the weft yarn from the yarn feeder is transferred onto the rotating drum. By retracting the locking body into the drum at a predetermined timing, the weft is released and weft insertion is performed.

(Problem that the invention seeks to solve).

However, in the above-mentioned conventional device, the length of the weft is always measured at a constant speed. Since the locking body must be protruded and locked, the timing of the locking body's protrusion must be adjusted to an appropriate timing, which poses a problem in that this adjustment is difficult. In addition, if the measured length is changed, the timing of the locking time changes, so the adjustment must be made each time.
There is a problem that the work is complicated.

The present invention has been made to solve these problems, and an object of the present invention is to provide a weft length measurement and storage device in which the protrusion timing of the locking body can be easily adjusted.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes a structure in which a locking portion of a locking body is projected at a predetermined timing onto the circumferential surface of a rotating drum that rotates at a predetermined speed. The weft is locked, the weft from the yarn feeder is stored in this rotating drum, and the locking part of the locking body is pulled into the rotating drum at a predetermined timing to release the weft and insert the weft. In the weft length measurement and storage device for a fia machine, a plurality of locking portions of the locking body are provided at approximately equal intervals on the circumference of the rotating drum to constitute the weft length measurement and storage device for a loom.

(Function) As described above, in the present invention, since a plurality of locking bodies are provided, any time when the weft is locked immediately after the locking part of the locking body protrudes onto the circumferential surface of the drum. Since the weft yarn is wound around the drum by the locking portion of one of the locking bodies, it is only necessary to adjust the protrusion timing of the locking portion regardless of the position of the locking portion. Further, even if the measured length of the weft yarn is changed, there is almost no need to adjust the protrusion timing of the locking portion of the locking body, so the adjustment work is extremely easy with the device of the present invention.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In the figure, 1 is the frame of the loom, 2 is a stand installed on the frame 1, 3 is a fixed guide fixed to the stand 2, 4
5 is a roller guide, and 5 is a yarn feeder supported by a stand 6 fixed to the frame 1. The weft 7 pulled out from the yarn feeder 5 is pulled out via the roller guide 4 and the fixed guide 3, and then It is wound around the length measurement storage device 10 of the present invention via a fixed guide 9 fixed to a bracket 8 fixed to the length measurement storage device 10 of the present invention. Reference numeral 11 denotes an L-shaped guide for guiding the weft yarn 7 pulled out from the length measurement storage device 10, and is fixed to the frame 1.

Reference numeral 12 represents a weft guide provided upright on the bracket 8, and reference numeral 13 represents a nozzle for inserting the weft, which swings together with the reed (not shown). The length measurement storage device 10 is configured as follows. That is, a hollow rotating shaft 17 is rotatably supported via a bearing 16 on a cylindrical support 15 (see FIG. 4) fixed to the bracket 8. This rotating shaft 17
A driven roller 18 is integrally fixed to the end of the drive roller 18 by a key 19. The small diameter portion 17a at the tip of the rotating shaft 17 has a
The weft winding is carried out by fitting the boss 20a of the rotary drum 20 and tightening the lock nut 22 screwed onto the tip of the rotary shaft 17 via the spacer 21.
7b and fixed. This drum 20 is rotated at a predetermined speed by the rotation of the driven roller 18. On the circumferential surface of the drum 20, there is a length measuring section 20d on the side opposite to the weft insertion nozzle with the large diameter section 20c as a boundary, and a storage section 20 on the side of the weft insertion nozzle.
e is formed. It is preferable that the storage section 20e has a slightly larger diameter than the length measuring section 20d.

The end plate portion 20f of the drum 20 on the weft insertion nozzle side includes:
A plurality of studs 23 (eight in this embodiment) are installed at equal positions on the circumference, and a bell crank-shaped locking body 24 is rotatably attached to each stud 23. It is. Then, the disc-shaped stop plate 25 is applied from the outside and fixed by screwing the naso 146. The outer periphery of this stop plate 25 has approximately the same diameter as the storage portion 20e to guide the weft yarn 7.

The locking body 24 has a bell crank shape, and one free end thereof is formed as a locking portion 27 so as to protrude radially outward from the circumferential surface of the drum 20, and the other free end is formed as a locking portion 27. A notched groove 28 is formed in a bifurcated shape that opens inward. A cam follower 31 is fitted into the cutout groove 28, which is pivotally supported by a screw 30 screwed onto a rotating plate 29 rotatably fitted to the boss portion 20a of the drum 20. One end of the coil spring 33 is attached to this rotating plate 29 with a screw 3.
4, and the other end is fixed by being locked to a locking body 35 fastened to the spacer 21. The coil spring 33 biases the rotary plate 29 clockwise in FIG. 6. This rotation of the rotating plate 29 causes the locking body 24 to rotate counterclockwise around the stud 23, so that the locking portion connects the outer periphery of the storage portion 20e of the drum 20 and the outer periphery of the disc 25. It is set so that it protrudes outward beyond the connected line.

Further, a rotary plate 38 is rotatably fitted to the middle body portion 17c of the rotary shaft 17, and a plurality of (three in this embodiment) connecting bodies 39 protruding from the rotary plate 38 are connected to the rotary plate 29. It is fixed with screws 40.

These connecting bodies 39 are connected to the end plate portion 20f of the drum 20.
It passes through an arc-shaped elongated hole 41 (see FIG. 4) formed in the hole. A notch 42 is formed in the rotating plate 38, and the rotating shaft 1
A cam follower 45 is fitted into the notch 42 and protrudes from an arm 44 which is held and fixed to one end of a swing shaft 43 having an axis perpendicular to the axis of the swing shaft 43 . Also, this swing shaft 4
A cam follower 47 is pivotally supported by a pin 46 (see FIG. 7) protruding from an eccentric position on the other end of the cam follower 47, and a cylindrical drive body 50 is rotatably fitted into the support 15. It is. As shown in FIG. 5, an oblique cam groove 51 is formed on the circumferential surface of the support body 15. As shown in FIG. This cam groove 5
A cam follower 52 fixed to the drive body 50 is fitted into the drive body 50 , and the end surface of the drive body 50 on the swing shaft 43 side forms a flat cam surface 53 .
It should be in contact with the. A stud 54 is protruded from the driver 50 and is connected to a swing lever 56 (see FIG. 2) via a turnbuckle 55. This swing lever 56 is rotatably supported on a shaft 57 protruding from the frame 1, and a cam follower 59 at the tip of an arm 58 integrated with this swing lever 56 rotates in synchronization with the main shaft of the loom (not shown). A spring 62 abuts against a cam 61 fixed to a shaft 60. The cam 61 is formed with a high portion 6111 and a low portion 61L, and the cam follower 59 is connected to the high portion 6111 and a low portion 61L.
111, the lever 56 is pulled down and the driver 50 is rotated in the direction of arrow A in FIG. 2, and therefore in the clockwise direction of arrow A in FIG. 50 slides toward the drum 20 side by the grooved cam 51, the cam follower 47 is pushed by the cam surface 53, and as a result, the swing shaft 43 rotates in the direction of arrow B in FIG. As the moving plate 38 rotates, the rotating plate 29 is rotated counterclockwise from the state shown in FIG. 6 to the state shown in FIG. 8. As a result, each locking body 24 rotates clockwise around the stud 23, so that the locking portion 27 is recessed further than the outer periphery of the storage portion 20e.

Conversely, when the lower portion 61L and the cam follower 59 come into contact, the locking portion 27 is made to protrude beyond the outer periphery of the storage portion 20e as shown in FIG.

It is set so that when the weft yarn 7 extends straight from the guides 9 to 11, it is located within the rotation locus of the protruding position of the locking portion 27 (see FIG. 1). The driven roller 8 is rotationally driven via an idler roller 66 from a drive roller 65 that rotates in synchronization with the main shaft.

This idler roller 66 is attached to the bracket 8. Note that the weft thread 7 is drawn through the guide 9, then wound approximately once around the length measuring section 20d, drawn through the guide 9 again, and then guided to the guide 11.

Therefore, the weft 7 is moved to the length measuring section 20 by the rotation of the drum 20.
d to the storage section 20e.

Next, the operation of the device will be explained with reference to the timing chart of FIG.

During operation of the loom, the driven roller 8 is rotated from the drive roller 65 via the idle roller 66. Therefore, the drum 20, the swing shaft 43, etc. are rotating via the rotating shaft 17. This rotational speed is set to correspond to one pick of weft insertion in 360 degrees.

Starting from the end of weft insertion (180'), the cam follower 59 moves from the high part 61H of the cam 61 to the low part 6.
Since the contact position changes to 1 and L, the drive body 50 is moved to a position away from the drum 20 by the grooved cam 51, so the swing shaft 43 is rotated in the direction opposite to the arrow B in FIG. Since the rotating plate 38 rotates via the cam follower 45 and the rotating plate 29 rotates clockwise from the position shown in FIG. 8, each locking body 24 is rotated counterclockwise around the stud 23. 6 to cause each locking portion 27 to protrude beyond the outer periphery of the storage portion 20e, as shown in FIG. The weft yarn 7 stretched between the guides 9 and 11 due to the protrusion of the locking portion 27 is locked by one of the locking portions 27, and is then wound up in the storage portion 20e. The guide 9 is positioned so that the weft yarn 7 first contacts the inclined surface 20g of the large diameter portion 20c on the storage portion 2Oe side. therefore,
The weft yarn 7 wound around the inclined surface 20g
0 g and moves to the cylindrical storage section 20e, so the weft yarns 7 are stored in the storage section 20e in the order in which they are wound. That state continued and after beating the reed it was 90 degrees.
When the phase is reached, the cam follower 59 moves to the top 6 of the cam 61.
111, the rotating plate 29 rotates counterclockwise as described above, and each locking body 24 rotates clockwise so that the locking portion 27 is moved from the outer periphery of the storage portion 20e. Also immersed. Then, weft insertion is performed by jetting fluid from the weft insertion nozzle 13, which starts jetting immediately before the weft insertion. In this weft insertion, the weft thread 7 wrapped around the storage section 20e in the first half is inserted during free running, and when this free running ends, that is, the weft thread 7 wrapped around the storage section 20e in the first half is inserted into the weft. After that, the weft thread 7 extends straight from the guide 9 to the guide 11, and the weft insertion is carried out at the speed at which it is sent out from the length measuring section 20d. In the course of this length measurement flight, the aforementioned 1806 phase is reached, so the locking portion 27 protrudes to lock the weft yarn 7, and starts winding it around the storage portion 20e.

When changing the length measurement due to changing the weaving width, change the diameter of the driving roller 65 and/or driven roller 18,
This is done by changing the rotational speed of the drum 20 for length measurement. Also,
The weft insertion start timing is adjusted by changing the contact timing between the cam follower 59 and the high portion 61H of the cam 61, so it is preferable to make it possible to change the phase of the cam 61 with respect to the shaft 60. Furthermore, it is preferable that the cam 61 is also a matching cam so that the protrusion timing of the locking portion 27 can be changed.

Note that the guide 11 may be a ring-shaped guide.

Further, the guide 9 may be formed into a sawtooth shape so that the weft yarn from the guide 3 and the weft yarn after being wound around the circumference are engaged with different troughs, respectively. Furthermore, a press roller may be pressed against the weft portion wound around the length measuring section 20d of the drum 20 to prevent slippage between the weft and the drum.

It is preferable that a clutch be interposed in the transmission system between the drive roller 65 and the main shaft, and the clutch be disengaged when the loom is reversed to prevent troubles associated with the reverse rotation of the drum.

(Effects of the Invention) As described above, in the present invention, since a plurality of locking bodies 24 are provided, the weft yarn 7 immediately after the locking part 27 of the locking body 24 protrudes onto the circumferential surface of the drum 20. Since the weft thread 7 is wound around the drum 20 by the locking part 27 of any one of the locking bodies 24, the weft thread 7 can be wound on the drum 20 regardless of the position of the locking part 27 of the locking body 24. It is only necessary to adjust the timing at which the portion 27 protrudes. Further, even if the measured length of the weft thread 7 is changed, there is almost no need to adjust the protrusion timing of the locking part 27 of the locking body 24, so according to the present invention, the adjustment work is extremely easy. Excellent results can be obtained.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view of a loom equipped with the device of the present invention, Fig. 2 is a perspective view showing the rear side of the loom, Fig. 3(a) is a front view of the main parts of Fig. 1, and Fig. 3(b) is a perspective view of the loom. 4 is a longitudinal cross-sectional view of the device of the present invention; FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4; and FIG. 6 is a VI-VI view in FIG. 4. A cross-sectional view along the line, Fig. 7 is the 4th
FIG. 8 is a diagram illustrating the operation of FIG. 6, and FIG. 9 is a timing chart.

Claims (1)

[Claims] 1. At a predetermined timing, the locking part 27 of the locking body 24 is protruded from the circumferential surface of the rotating drum 20 rotating at a predetermined speed to lock the weft yarn 7, and the weft yarn 7 from the yarn supplying body 5 is rotated by this rotation. A weft length measuring storage for a loom, in which the weft yarn 7 is stored on a drum 20 and is inserted by releasing the weft yarn 7 by retracting the locking part 27 of the locking body 24 into the rotating drum 20 at a predetermined timing. A weft length measuring and storage device for a loom, characterized in that a plurality of locking portions 27 of the locking body 24 are provided at approximately equal intervals on the circumference of the rotating drum 20.