JPS6363655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn guide device in a drum-type weft storage device for a shuttleless loom.

Conventional drum-type weft storage devices either rotate the drum itself or hold the drum stationary and rotate a yarn guide around it to wrap the weft around the drum and store it. 1st
A device has been proposed in which the weft is stored between the second locking body and the weft insertion length (Japanese Patent Application No. 1983-
101174 and patent application No. 55-86497).

By the way, in this kind of drum-type weft storage device, when the weft is long-wrapped around the drum, the weft is separated from the weft that will be wound around the drum thereafter by the first locking body. , the operation timing of the first locking body is set in relation to the rotational phase of the drum or thread guide, but at high speeds, the movement of the cam roller provided in the drive system of the locking body causes the timing of the operation of the first locking body to be set according to the rotational phase of the drum or thread guide. For example, in a fixed drum type weft storage device, the yarn guide is the first
When passing through the position of the first locking body, the first locking body may not be activated. In such a case, adjustments must be made within the allowable range, that is, the timing at which the thread guide passes the position of the first locking body will be delayed. This is done by removing the toothed belt that is wound between them and changing the meshing part, which has the disadvantage that the work is complicated.

The present invention was made with the aim of solving these drawbacks, and the present invention is one in which the thread guide is attached to its mounting body so that its position can be adjusted in the rotational direction (the rotational direction of the drum or the thread guide). be.

The present invention will be explained below based on the drawings. 1st
A first embodiment of the present invention is shown in FIG.

In the figure, 1 is the frame of the loom, 2 is a weft insertion air injection nozzle held in a nozzle holder 3 installed upright on the frame 1, and 4 is attached to a stay 5 fixed to the nozzle holder 3, and 4 is attached to a stay 5 fixed to the nozzle holder 3. The guide 4 is a guide arranged at the rear (left side in the figure), and the weft 6 guided from the weft storage device, which will be described later, is a guide 4.
The weft is inserted into the opening of the warp (not shown) by the air jetted from the nozzle 2 during weft insertion.

To explain the weft storage device according to the present invention, the upper end is attached to a bearing portion 9a on a bracket 8 which is fixed to the outer surface of the frame 1 with bolts 7 and arranged horizontally.
Attach the lower end of the bracket 9 formed as
0, and the axis of the bearing part 9a is aligned with the guide 4.
It is aligned with the axis of

A ball bearing (not shown) is provided in the bearing portion 9a.
A rotating shaft 12 is rotatably supported through the rotating shaft 12, and a toothed belt 13a is connected between a toothed pulley 13 fixed to the rear end of the rotating shaft 12 and a drive pulley (not shown) of the loom. is wound so that the rotating shaft 12 is rotated in relation to the loom. Hereinafter, it is assumed that the transmission ratio is 3:1 and that the rotating shaft 12 rotates three times for each rotation of the loom.

A holder 16 is supported at the front end of the rotating shaft 12 via a ball bearing (not shown) so as to be relatively rotatable, and a drum 18 is fixed to the holder 16 by bolts 17. And drum 1
A weight (not shown) is provided in a part of the drum 8 and is fastened together with a bolt 17, and the drum 18 is fixed with this weight positioned at the lowest position. On the circumferential surface of the drum 18, there are formed a tapered part 18a whose outer diameter gradually decreases from the rear end side to the front end side, and a straight part 18b continuous with the minimum diameter part and having approximately the same diameter. Here, the diameter of the straight part 18b is set so that the length of the weft thread 6 wound three times around the straight part 18b becomes the length of one weft insertion.

Further, a thread guiding hole 20 that opens to the rear end surface is formed in the axis of the rotating shaft 12, and a pipe 21 is screwed onto the circumferential surface of the rotating shaft 12. are communicated. 22 is a lock nut. The tapered portion 18 of the drum 18 is bent obliquely to the tip of the pipe 21 .
A thread guide mounting body 23 facing a is fixed.

A yarn guide 70 having a weft insertion hole 71 and an elongated hole 72 as a yarn guide portion is fixed to the tip of the yarn guide attachment body 23 by a screw 73 inserted into the elongated hole 72. Therefore, by loosening the screw 73, the position of the thread guide 70 can be adjusted by the length of the elongated hole 72 in the direction of rotation (direction of arrow A). Here, the position adjustment mechanism is composed of a long hole 72 provided in the thread guide 70 and a screw 73.

Here, the weft yarn 6 pulled out from the yarn supplying body (not shown) is attached to the stay 26 fixed to the bracket 9 and sent to an air injection nozzle 27 for drawing the weft yarn disposed behind the axis of the rotating shaft 12. After pulling it through, the thread guide hole 20 of the rotating shaft 12 and the pipe 21 are
Then, after passing through the weft insertion hole 71 of the thread guide 70, the thread is wound around the tapered part 18a and the straight part 18b of the drum 18, and at least one of the first and second locking bodies 31 and 32, which will be described later. The guide 4 is threaded through the guide 4.

The first and second locking bodies 31 and 32 are fixed shafts 35
Holes 33, which are rotatably pivotally connected to the drum 18, and have locking parts 31a and 32a formed at their tips are drilled in the vicinity of the boundary between the tapered part 18a and the straight part 18b of the drum 18, and in the straight part 18b. 3
It is opposite to 4. Further, swing levers 37 and 38 are rotatably attached to the fixed shaft 36, and the tips of these levers and intermediate parts of the first and second locking bodies 31 and 32 are connected via rods 39 and 40. connected.
The fixed shafts 35 and 36 are supported by a pair of support plates 42a and 42b fixed to studs 41 protruding from the outer surface of the frame 1.

The swing levers 37 and 38 are connected to these and the fixed pin 4.
Cam rollers 47 and 48, which are biased by springs 45 and 46 stretched between the cams 3 and 3, and which are attached to the intermediate portions of the cams 49 and 50, are in contact with the cams 49 and 50.
The cams 49, 50 are provided with the pair of support plates 42a, 4.
The rotary shaft 51 is fixed to a rotary shaft 51 rotatably supported between 2b, and this rotary shaft 51 receives power from a drive pulley (not shown) of the loom via a toothed belt 52a to a toothed pulley 52 fixed to the rotary shaft 51. Loom 1
It is designed to rotate once per rotation.

The cams 49 and 50 are each formed with a high portion and a low portion, and when the high portions of the cams 49 and 50 and the cam rollers 47 and 48 come into contact with each other, the swing levers 37 and 38 and the rods 39 and 40 The locking parts 31a, 32a of the locking bodies 31, 32 enter the holes 33, 34 of the drum 18 through the cams 49, 50.
When the lower parts of the drum 18 come into contact with the cam rollers 47 and 48, the locking parts 31a and 32a engage the holes 33 and 48 of the drum 18, respectively.
34 is starting to leave.

Next, the action will be explained.

During operation of the loom, the rotary shaft 12 rotates three times per revolution of the loom, and the drum 18 is held stationary without rotating due to gravity due to the weight. Therefore, as the rotating shaft 12 rotates, the pipe 21 and therefore the yarn guide 70 rotate around the drum 18, and the weft 6
is wound around the tapered portion 18a of the drum 18.
The weft thread 6 wound around the tapered part 18a of the drum 18 slides down the tapered part 18a due to its own tension, and moves to the straight part 18b while pushing away the previous one.

If we explain from the point just before weft insertion, at this time the locking portions 3 of the first and second locking bodies 31 and 32
1a and 32a are inserted into the holes 33 and 34 of the drum 18. In this state, the weft yarn 6 is locked to the locking part 31a of the first locking body 31, and then the drum 1
After being wound three times around the straight part 18b of No. 8, the second
It is locked by the locking part 32a of the locking body 32.

When the loom rotates from this state, the locking part 32a of the second locking body 32 exits from the hole 34 of the drum 18, the locking on the weft yarn 6 is released, and the air flow of the nozzle 2, which starts immediately before this, is released. The weft yarn 6 is inserted by the injection. Due to this weft insertion, drum 1
When the winding amount of the straight portion 18b of No. 8 becomes 0, the weft 6 is locked to the locking portion 31a of the first locking body 31, and weft insertion is completed.
rotates approximately once, so the weft thread 6 rotates approximately once toward the tapered portion 18a side from the locking portion 31a of the first locking body 31.
wrapped around.

Immediately after this, first, the locking portion 3 of the second locking body 32 is
2a enters the hole 34 of the drum 18 again, and then the locking part 31a of the first locking body 31 exits from the hole 33 of the drum 18. Then, the weft yarn 6 wound around the tapered part 18a slides down and moves to the straight part 18b, and the locking part 32 of the second locking body 32
It comes to be locked in a.

Then, when the weft yarn 6 is wound around the straight portion 18b nearly three times, the locking portion 3 of the first locking body 31
1a enters between the weft part being wound around the tapered part 18a and the weft part being wound around the straight part 18b, and separates them. Immediately after this, weft insertion is performed as described above.

Here, if you want to change the positional relationship between the locking part 31a and the weft yarn 6 for the above-mentioned reason, for example, if you want to slow down the passage of the weft yarn 6 through the first locking part 31a, loosen the screw 73. Then, the thread guide 70 may be fixed by moving it relative to the thread guide mounting body 23 in a direction opposite to its rotational direction (direction of arrow A), that is, downward in FIG. On the other hand, if it is desired to speed up the passage, the thread guide 70 can be moved in the direction of rotation, that is, upward in FIG. 2, and fixed. Therefore, the thread guide 70
phase adjustment can be performed extremely easily.

FIG. 3 shows a second embodiment.

In this embodiment, an arc-shaped elongated hole 75 is provided in the thread guide mounting body 23' having a fan-shaped tip, and a stud bolt 77 is installed in the thread guide 76 having a weft insertion hole 77 in the elongated hole 75. It is designed so that it can be inserted and fixed at any position, and the same effect can be obtained in this way.

In the first and second embodiments, a fixed drum type weft storage device is shown, but in the case of a rotating drum type weft storage device in which the drum is rotated without rotating the yarn guide, a plurality of yarn guides are generally used. Although a bar-shaped thread guide having striped grooves is used, the same effect can be obtained if the thread guide is attached to the mounting body so that its position can be adjusted in the direction of rotation of the drum.

That is, as in the third embodiment shown in FIGS. 4 and 5, the drum 18 is rotated by attaching the drum 18 to the front end of the rotating shaft 12 via a drum holder 81 with a fastener 80. A rod-shaped yarn guide 83 having a plurality of grooves 83a, 83b is attached to a stay 82 attached to a bracket 9b protruding from a bearing 9a of the shaft 12, and a weft 6 is inserted between the rotating drum 18 and the yarn guide 83. In the case of a fixed drum type weft storage device in which the weft yarn is wound around, an arc-shaped long hole 84 is provided in the bracket 9b.
A bolt 85 for fixing the stay 82 may be inserted into the stay 82, and the stay 82 may be fixed at an arbitrary position with a nut 86. Note that 87 and 88 are locking bodies that protrude and retract from inside the drum 18.

As explained above, according to the present invention, it is possible to obtain the effect that the phase of thread guide can be adjusted extremely easily.

[Brief explanation of drawings]

FIG. 1 is a front view of a weft storage device showing a first embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a plan view of a second embodiment, and FIG. FIG. 5 is a front view showing an embodiment of the present invention, and FIG. 5 is a view taken along the arrow V in FIG. 6... Weft, 9b... Bracket, 12... Rotating shaft,
18...Drum, 23, 23'...Thread guide mounting body, 7
0, 76... Yarn guide, 71, 77... Weft insertion hole, 7
2, 75... Long hole, 73... Screw, 77... Stud bolt, 82... Stay, 83... Thread guide, 83a, 8
3b...Groove, 84...Elongated hole, 85...Bolt.

Claims (1)

[Claims] 1 A yarn guide is provided outside the drum by disposing a yarn guide section that guides the weft yarn from the weft yarn supply source, and by rotating either the drum or the yarn guide, the weft yarn is wound around the drum and stored. A drum-type weft storage device for a shuttleless loom as described above, wherein the yarn guide portion of the yarn guide is provided so as to be adjustable in position with respect to the rotational direction.