JPS5848653B2 - Shuttle with rotating piece - Google Patents

Description

[Detailed description of the invention] The present invention relates to a shuttle for a loom.

As shown in Fig. 1, the shuttle of a loom generally has a woodwind chamber 2 inside the shuttle body 1 to house a woodwind 3, and while unwinding the weft thread 4 wound around the woodwind, it moves in the direction of arrow A or arrow B.
Fly repeatedly in alternate directions.

When the shuttle body 1 flies in the direction of arrow A, the weft 4 is let out in the direction of arrow a, and when the shuttle body 1 flies in the direction of arrow B, the weft 4 is let out in the direction of arrow b.

Then, tension is applied to the weft yarn 4 in accordance with the resistance while the weft yarn 4 is being let out as described above.

It is desirable that the above tension is always constant; if a shockingly large tension is applied, there is a risk that the weft threads will break, and if the tension is lost, there is a risk that the weft threads will become loose and weave may become uneven. .

In order to make the above-mentioned tension constant, various kinds of constant tension applying means (shown by imaginary lines) 5, which will be described later, are provided in the shuttle body 1 along the weft feeding path.

Tension pieces, sliding threads, and the like are widely used as the above-mentioned constant tension applying means.

FIG. 2 shows the tension piece 6 mentioned above.

The tension piece 6 has one or more rings 7 fixed thereto, is rotatably supported by a shaft 8, and is biased with rotational force in the direction of arrow C by an elastic body 9 such as a rubber strip.

Adjacent to said ring 7 a needle 10.10 is implanted in the shuttle body.

Tension piece rings 7, 7 and needle 1 having the above structure
When weft thread 4 is inserted so as to alternately sew between 0 and 10,
The weft yarn 4 passes through in a waveform due to the rotational force of the tension piece 6 in the direction of arrow C, thereby providing an appropriate resistance.

Further, when the weft yarn 4 is about to loosen, the tension piece 6 rotates in the direction of arrow C to make the weft yarn 4 meander in a large waveform to absorb the slack.

However, the amount of slack absorption is relatively small.

FIG. 3 shows the sliding thread 11 mentioned above.

The sliding thread opening 11 is a small plate-shaped piece with thread opening holes 11a.

An elongated opening 12 is formed on the side surface of the shuttle body 1, and rail grooves 12a, 12b are provided on the upper and lower edges of the opening, respectively.
12b in a slidable manner.

One end of a rubber strip 13 is fixed to the sliding thread opening 11, the rubber strip 13 is wound around a pulley 14, and the other end is fixed to the shuttle body 1 at a point E.

The weft thread 4 is inserted into the thread opening 11a and folded back, and the weft thread 4 is inserted into the needle 1.
It passes through between 5 and 15 and is rolled out.

As a result, tension is applied to the weft yarn 4 by the rubber strip 13,
The sliding yarn opening 11 is guided by the rail grooves 12a, 12b and freely slides, thereby balancing the elastic urging force of the rubber strip 13 with the tension of the weft yarn 4.

For this reason, when the weft thread 4 is suddenly strongly pulled out in the direction of arrow a or arrow b, the rubber strip 13 stretches to relieve the impact load, and when the weft thread 4 tries to loosen, the rubber strip 13 contracts and the weft thread 4 is pulled in by hand. acts to keep the tension almost constant.

Shuttles that have been commonly used in the past are equipped with the tension pieces, sliding threads, and various other means for applying constant tension as described above, but as customer preferences for mechanical products become more sophisticated and weaving technology becomes more sophisticated, the shuttle The required level of constant tension application performance is also becoming increasingly sophisticated.

For example, when looking at the length of the weft yarn that can absorb slack, by arranging four rows of the above-mentioned sliding thread openings in one shuttle, a considerable length (for example, about 50 CIn) of slack can be absorbed. Demands from the perspective of machine bodies in loom technology require a dramatic increase in the above-mentioned slack absorption capacity.

These demands can no longer be met by combining various types of constant tension applying means that have been commonly used in the past.

In view of the above-mentioned circumstances, the present invention has created a constant tension applying means with a completely new configuration, and can be used alone or in combination with means related to the prior art to maintain the tension of the weft at a constant value while maintaining a long dimension. The purpose is to enable manual weft threading and dramatically increase the ability to absorb slack in the weft threads.

In order to achieve the above object, the present invention provides a rotary piece with an elastic winding force in the shuttle, and uses the rotary piece to wind and absorb the slack of the weft in the middle of the weft unwinding path. The purpose is to maintain the tension of the weft at a constant level, and more specifically, it uses a rotary piece, which is made up of two winding drums with flanges that are connected concentrically, to be freely rotatable in the weft unwinding path. One of the two winding drums has a through hole that communicates its end with the outer periphery, and the other winding drum is wrapped with an elastic wire. One end of the strip is fixed to the shuttle body, an elastic rotational force is applied to the winding drum, and the weft yarn bowed from the woodwind is passed through the through hole and then let out to the outside of the shuttle body. It is characterized in that the weft is wound around the winding drum so that slack in the weft can be absorbed and its tension can be kept constant.

Next, one embodiment of the present invention will be described with reference to FIGS. 4 to 6.

FIG. 4 is a longitudinal cross-sectional view of the vicinity of the weft payout path of a shuttle equipped with a rotary piece according to the present invention, FIG. FIG. 6 is a perspective view of the same.

1 is the shuttle body, 3 is the woodwind stored inside it, 4
is the weft yarn drawn out from the wood pipe mentioned above.

6 is the tension piece explained in Fig. 2, 7 is the same section,
10 is the same needle.

Reference numeral 11 denotes the sliding thread opening described in connection with FIG. 3, 11a the thread opening hole, and 13 a rubber strip attached to the sliding thread opening.

As shown in FIG. 4, a rotating piece chamber 16 is provided in the woodwind body 1, adjacent to the woodwind chamber 2 and on the side in the direction in which the weft 4 is fed out.
A rotary piece 17, which will be described later with reference to FIG. 5, is rotatably supported therein by a shaft 18.

A needle 19 is fixed to the shuttle body 1 above the rotating piece 17.

As shown in FIG.
A large-diameter winding drum 22 provided with 0, 21 and a small-diameter winding drum 24 provided with a flange 23 are integrally molded concentrically, and the flange 21 is used for both winding drums 22 and 24.

However, the above-mentioned large diameter and small diameter refer to the size of the main body portion of the winding drum, not including the flange.

Then, a through hole 25 is bored between the upper end surface of the large-diameter winding drum 22 and the outer peripheral surface of the winding drum.

It is desirable that the position where the through hole 25 opens in the end face of the winding drum be as close to the center as possible.

In order to rotatably support the rotating piece 17 described above, a shaft 18 is implanted in the shuttle body 1 with a shaft hole 26 bored in its center.
However, in this embodiment, in order to prevent the shaft 18 from blocking the opening of the through hole 25, the shaft hole 26 is made into a stepped through hole, and the top 18a of the shaft 18 is fitted into the through hole 25. It is sunk below the opening.

When the present invention is applied, the means for rotatably supporting the rotary piece can be freely selected and used as long as it does not block the periphery of the opening of the through hole.

The small-diameter winding drum 24 has an elastic filament 2 such as a rubber strip.
7 is tied together, the other end is fixed to the shuttle body, and elastic rotational force is applied to the rotary piece 17 by the contraction force of the filament 27.

The above-mentioned filament 27 may be a member whose entire length can be elastically expanded and contracted, and the portion wound around the small-diameter winding drum 24 may be a non-stretchable thread.

In this embodiment, as shown in FIG. 6, the rubber strip 27 wound around the small-diameter winding drum 24 of the rotating piece 17 is wound around a pulley 28 that is pivotally supported on the shuttle body, and the other end is fixed to the shuttle body at a point P. It has been done.

In this way, since a long rubber strip 27 can be used, the rotational biasing force applied to the rotating piece is less likely to change with rotation, and the possible length for absorbing slack can be increased.

In order to use the rotating piece configured as described above, the rubber strip 27
After adjusting the length and applying appropriate tension, the rotating piece 17
is turned by hand to wind the rubber strip 27 into the small-diameter winding drum section 24.

In this state, the rotating piece 17 is held down with a fingertip to stop its rotation, and the weft thread 4 pulled out from the woodwind is wound around the needle 19 and inserted from the end surface side of the through hole 25 of the rotating piece toward the outer circumferential side.

The weft yarn pulled out from the woodwind may be inserted directly into the through hole 25 of the rotating piece 17, but in this embodiment, the weft yarn 4 pulled out from the woodwind is passed through the through hole 25 of the rotating piece via the tension piece 6.
5.

The weft yarn 4 pulled out from the through hole 25 may be fed out of the shirttle main body as it is, but in this embodiment, the weft yarn 4 is
As shown in the figure, the thread opening 11a of the sliding thread opening 11 described above
, pass it between pins i5 and 150, and feed it out of the shuttle body.

After inserting the weft thread 4 through the through hole 25 of the rotating piece as described above, when you release your finger holding the rotating piece 17, the rotating piece 17
is rotated by the contraction force of the rubber strip 27, and this rotation causes the dog-diameter winding drum 22 to wind up the weft yarn 4.

At this time, as can be easily understood from the above-mentioned configuration, the large-diameter winding drum 22 winds up the weft on the side pulled out from the outer opening of the through-hole 25, but it is closer to the woodwind than the through-hole 25. The side weft threads are not rolled up.

The same applies when unwinding the weft yarn. The above winding rotation is
The process continues until the tension of the weft yarn 4 and the tension of the rubber strip 27 are balanced, and then automatically stops when the tension is balanced.

After that, when the tension of the weft yarn 4 is about to decrease, the rubber strip 27
contracts and winds up the weft yarn 4, keeping its tension almost constant.

In this way, slack in the weft yarn 4 is absorbed and constant tension is maintained automatically.

Further, when the tension of the weft yarn 4 is about to increase, the rotating piece 17 stretches the rubber strip 27 and winds it into the winding drum 24, and rotates in a direction in which the weft yarn 4 is unwound from the dog diameter winding drum 22.

In this way, excessive tension in the weft yarn 4 is relieved and a constant tension is maintained.

Since the rotary piece according to the present invention winds up the weft yarn through the rotational operation as described above, it is possible to wind up the weft yarn several tens of times longer than the diameter D1 of the large diameter portion of the rotary piece.

For this reason, it is possible to obtain a much larger slack absorbing capacity than the conventional device without taking up a large space for installing the rotary piece.

As in the above embodiment, the small diameter winding drum 24 winds up the rubber strip.
The diameter D1 of the large-diameter winding drum 22 that winds the weft is larger than the diameter D2 of the
Then, the expansion and contraction dimension of the rubber strip is D2/D
Enlarged to 1x, you can wind in and unwind the weft.

Furthermore, when the sliding thread 11 is used in combination as in this example, the slack absorbing ability of the rotary piece according to the present invention and the slack absorbing ability of the sliding thread 11 act in an additive manner, resulting in an even greater slack absorbing ability. can get.

Further, by using the tension piece 6 in combination, when the weft wound by the dog-diameter winding drum 22 is completely unwound, an appropriate tension can be applied to the weft unwinding from the woodwind 3.

Since the rotary piece according to the present invention is a member that has a rotary piece chamber provided in the shuttle body and is arranged to be pivoted therein, it does not interfere with the installation of a sliding thread provided on the side surface of the shuttle body. .

For this reason, the device of the present invention can be easily installed together with a sliding yarn head, and by installing it in conjunction with the device, the performance of keeping the tension of the weft yarn constant can be further improved.

As explained above, the present invention rotatably supports a rotary piece formed by two winding drums each having a flange connected concentrically in the weft unwinding path in the shuttle body. One of the two winding drums has a through hole that communicates its end surface with the outer circumferential surface, and an elastic filament is wound around the other winding drum, and the other end of the filament is wound around the other winding drum. It is fixed to the shuttle body to apply an elastic rotational force to the rotary piece of the penal code, and applies a constant force to the weft thread so that the weft thread inserted through the through hole can be wound around the one winding drum, and Excessive tension can be alleviated and the slack absorption capacity of the weft can be dramatically increased.

Further, by adding a sliding thread to the rotary piece configured as described above, its performance can be further improved.

[Brief explanation of the drawing]

Figures 1 to 3 show shuttles commonly used in the past. Figure 1 is a perspective view, Figure 2 is a perspective view of a tension piece extracted, and Figure 3 is a shuttle with a sliding thread. FIG. Figures 4 to 6 show one embodiment of the shuttle according to the present invention, Figure 4 is a longitudinal cross-sectional view of the vicinity of the weft thread payout section, and Figure 5 is a cross-sectional view of the rotating piece with its auxiliary members added. The explanatory drawing, FIG. 6, is a perspective view showing the arrangement of the constituent members. 1... Shuttle body, 4... Weft,
6...Tension piece, 10,15.19...
...Needle, 11...Sliding thread, 16...
・Rotating piece room, 17...Rotating piece, 18...
・Same room, 20, 21, 23...Flange, 22
......Large diameter winding drum, 24...Small diameter winding drum, 25......Through hole drilled in large diameter winding drum, 26...
...A shaft hole of a rotating piece, 27. River...An elastic line such as a rubber strip +128...A pulley.

Claims (1)

[Scope of Claims] 1. A rotating piece in which two winding drums each having a flange are integrally and concentrically connected is rotatably supported in the weft feeding path in the shuttle main body, One of the winding drums has a through hole that communicates its end face with the outer peripheral surface, and an elastic filament is wound around the other winding drum, and the other end of the filament is fixed to the shuttle body. Said one of the rotary pieces is biased with an elastic rotational force by applying an elastic rotational force to the rotational piece, and the weft thread pulled out from the woodwind is passed through the through hole and then fed out of the shuttle body. A shuttle equipped with a rotating piece, characterized in that the weft is wound around the winding drum to absorb slack in the weft and to apply appropriate tension to the weft. 2. In a shuttle in which a sliding thread is supported so as to be slidable in the longitudinal direction of the shuttle, and an elastic sliding force is applied to the sliding thread, during the weft thread pay-out path in the shuttle body,
A rotary piece which is made up of two concentrically integrated winding drums each having a flange is rotatably supported. A hole is bored, an elastic filament is wound around the other winding drum, and one end of the filament is fixed to the shuttle body to apply an elastic rotational force to the winding drum, and the weft yarn pulled out from the woodwind. is sequentially inserted into the through hole and the sliding thread opening and then fed out of the shuttle body, thereby winding the weft into the one winding drum of the rotating piece to which the elastic rotational force is applied, thereby absorbing the slack of the weft. A chanotre equipped with a rotating piece, characterized in that it is capable of applying appropriate tension to the weft yarn. 3 Of the two winding drums, the diameter of the winding part of the winding drum with a through hole through which the weft is inserted is set to be smaller than the diameter of the winding part of the winding drum around which the elastic filament is wound. A shuttle equipped with a rotary piece according to claim 2.