JPH0230467Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a weft storage device for a weft yarn between a weft feeder and a weft insertion means in a loom.

<Prior art> As a conventional weft storage device, the
There is something shown in the publication.

When storing the weft yarn in a coiled manner between the weft yarn supplying body and the weft insertion means, a plurality of rollers are arranged in a skein frame shape, and the center axis of some or all of the rollers is centered around the skein frame axis. A coil formed continuously on the winding end of a roller frame arranged so as to be parallel to one of the planes and not included in any plane including The weft yarn is advanced toward the unraveling end in the order of formation and independently by the arrangement, and is stored while holding the weft portion stretched from the coil closest to the unwinding end to the weft inserting means in the advancing direction. After that, it is pulled out in a balloon shape while applying rotational resistance.

According to this, the coil of wound weft yarn moves forward toward the unwound end at a constant speed due to the twisting and rotation of the rollers that make up the roller frame, so that the weft yarns that are to be wound one after another are already wound. Not only will the weft threads run on top of the existing weft coils, but they also rarely touch each other, so the weft threads may become tangled, damaged, or
It is possible to prevent an increase in unwinding resistance due to running over, and it is possible to store the weft yarns in an orderly manner.

<Problems to be solved by the invention> However, such conventional weft storage devices are not designed to change the inclination of the rollers with respect to the plane containing the skein frame axis.
The weft winding pitch (pitch between coils) is the same for all yarns, making it difficult to store yarns from thick to thin under suitable conditions.

For example, if you set the inclination of the roller so that the winding pitch is about 1 mm for thin threads, in the case of thick threads or tape-like threads, the newly wound thread may come into contact with or ride over the previously wound thread. A problem occurs.

In addition, when winding is performed while detecting the amount of winding, a non-contact type weft detector (for example, photoelectric type or capacitance type) is used because it does not affect the winding shape and does not damage the yarn itself. is preferred, in which case a finite detection range is required.
When the weft yarns are lined up at the same pitch and the coil progresses, when the pitch of the thick yarn is used as a reference, when the yarn is very thin, the ratio of the projected cross-sectional area of the yarn to the detection range is relatively extremely low. This causes a problem that may cause false detection.

In view of these conventional problems, it is an object of the present invention to make it possible to adjust the winding pitch to match the properties of the yarn.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides an inclination angle adjustment method that allows the inclination angle of at least one rotationally driven roller with respect to a plane including the skein frame axis to be freely adjusted. The system is equipped with a device.

<Function> As a result, the weft yarn wound around the roller frame is continuously sent toward the end on the weft insertion means side by the twisting and rotation of the rollers that make up the roller frame, so that the coils of adjacent weft yarns are Not only will there be no gaps between the wefts and weft insertion errors due to overlapping of the wefts, but at least one of the rotationally driven rollers will not be caused.
Since the two inclination angles can be adjusted by the inclination angle adjustment device, by adjusting the inclination angle, the feed amount of the weft yarn and the winding pitch can be made variable, depending on the thickness of the yarn used, etc. The optimum winding pitch can be set.

<Example> An embodiment of the present invention will be described below.

1 to 4 show a weft storage device according to the present invention, FIG. 5 shows a control circuit thereof, and FIG. 6 shows the overall configuration of a loom.

First, the overall configuration of a loom (in this example, an air injection loom) will be explained.

In Fig. 6, 1A and 1B are the frames of the loom, 2 is the back crawler, 3 is the weft, 4 is the heddle, and 5 is the weft.
is a reed, 6 is a woven fabric, 7 is a woven fabric, and 8 is a breast beam. Further, 9 is a yarn feeding stand, 10 is a yarn feeding body, 11 is a weft, 12 is a bracket fixed to the frame 1A, 13 is a weft storage device attached to the bracket 12, 14 is a weft guide provided on the frame 1A, 15 is a weft insertion nozzle that swings together with the reed 5. Here, the weft yarn 11 pulled out from the yarn supplier 10 is stored in the weft storage device 13, inserted into the weft opening by air jet from the weft insertion nozzle 15, and then beaten by the reed 5. A woven fabric 7 is woven.

Next, the weft storage device 13 according to the present invention will be explained with reference to FIGS. 1 to 4.

A rotating shaft 22 is rotatably supported by a bearing 21 on a support 20 fixed to the bracket 12. A variable speed electric motor 23 is fixed to the end surface of the support body 20 on the side of the yarn supplying body 10 (on the left side in the drawing), so that the rotary shaft 22 can be rotationally driven. This motor 23 does not need to be a variable speed type as long as it can pull out more weft yarns 11 than the consumption amount of the weft yarns 11, but if it is a variable speed type, it is set to the optimum rotation speed according to the consumption amount of the weft yarns 11. There are many advantages to being able to do so.

The rotating shaft 22 has a yarn guide hole 24 formed in the axis of the yarn feeder 10 side portion thereof, through which the weft 11 from the yarn feeder 10 is drawn, and a yarn guide hole 24 in the intermediate portion.
A winding pipe 25 that communicates with and projects obliquely is fixed with screws 26. A winding guide 27 is fixed to the tip of the winding pipe 25. A balance rod 28 is fixed to the rotating shaft 22 in symmetry with the wrapped pipe 25, and is fixed with a nut 29.

The weft insertion nozzle 15 side of the rotating shaft 22 (left side in the figure)
A flanged cylindrical stationary support 31 is supported through a bearing 30 in such a manner as to be relatively rotatable.
The stationary support 31 has a permanent magnet 32 fixed thereto.
is opposed to a permanent magnet 32 fixed to the support body 20 with a predetermined gap therebetween, and the attraction action of these magnets 32 and 33 keeps it stationary even when the rotating shaft 22 rotates. Incidentally, the wrapped pipe 25 is configured to pass through a gap between the magnets 32 and 33 when rotating.

The stationary support body 31 includes drive rollers 35A, 35B, and 35C that constitute a roller frame 34 and a driven roller 4.
9A, 49B, and 49C are arranged in a frame shape.

The drive rollers 35A to 35C have their shafts 36
A to 36C are rotatably supported by respective support frames 37A to 37C via bearings 38. These support frames 37A to 37C are fixed to a bracket 40 by bolts 39, and this bracket 40
is fixed to the stationary support 31 by bolts 41.

Pulleys 41A to 42C are fixed to the ends of the shafts 36A to 36C by screws 43, respectively, and these pulleys 42A to 42C and the rotating shaft 22
The round belt 4 is connected between the boule 44 formed at the end of the
5 is wrapped around it. Guide rollers 46A and 46B are attached to brackets 48A and 48B fixed to bracket 40 with bolts 47. As a result, the rotation of the rotation shaft 22 causes the drive rollers 35A to 35C to rotate around the shafts 36A to 36C in the same direction.

Here, these drive rollers 35A to 35C
By attaching the support frames 37A to 37C tilted in the same direction with respect to the bracket 40, the axes 36A to 36C are not included in any plane including the axis of the rotating shaft 22, and are included in one of the planes. are made to be parallel.

Further, as shown in FIG. 4, a pair of arc-shaped adjustment holes 80 are formed in the bracket 40 for fixing the support frames 37A to 37C, and the bolts 39 inserted into these adjustment holes 80 are used to fix the support frames 37A to 37C. By fixing roller 37C, the inclination angles of drive rollers 35A to 35C can be adjusted. Afterwards,
Drive rollers 35A to 35A are supported by support frames 37A to 37C, bolts 39, brackets 40, adjustment holes 80, etc.
It constitutes a 35C inclination angle adjustment device.

The driven rollers 49A to 49C are rotatably attached to the respective support shafts 50A to 50C via bearings 51. These support shafts 50A
The ends of ~50C are adjustment holes 52A~5 formed in the stationary support 31 radially with respect to the axis of the rotating shaft 22.
2C and is tightened and fixed with a lock nut 53.

These support shafts 50A to 50C are bent near the ends, and the driven rollers 49A to 49C
are tilted at approximately the same angle in the same direction as the drive rollers 35A to 35C so that their central axes are not included in any plane including the axis of the rotating shaft 22 and are parallel to one of the planes. .

Therefore, the drive rollers 35A to 35C and the driven rollers 49A to 49C are arranged in a frame shape, and their center axes are not included in any plane including the axis of the rotating shaft 22 as the frame axis. The roller frame 34 is arranged in a twisted manner so as to be parallel to one of the planes.

54 is a cover having a through hole 55 arranged to cover the ends of the drive rollers 35A to 35C (including the pulleys 42A to 42C) from the outer circumferential side, and the stay portion is fixed to the bracket 40 with bolts 56. There is.

Reference numeral 57 denotes a rod-shaped locking body, which is supported by a bracket 58 fixed to the support body 20 and is disposed so as to face the outer peripheral surface of the cover 54 from the outside. This locking body 57 is normally attached to the bracket 58 with the bolt 5.
The weft insertion nozzle 15 passes through the through hole 61 of the cover 60 fixed at 9 and further enters the through hole 55 of the cover 54, and the weft insertion nozzle 15 is inserted between the cover 54 and the cover 60 from the unrolled end of the roller frame 34. Weft 1 stretched across
1 is locked.

A cam 62 rotates in synchronization with the main shaft of the loom, and is in contact with a cam follower 65 at the end of a lever 64 pivotally connected to a fixed shaft 63. During weft insertion, the upper part of the cam 62 comes into contact with the cam follower 65, and the lever 64 rotates counterclockwise in the figure, pulling up the locking body 57 connected to the lever 64 by a wire 66, and pulling up the cover 54. 60 through holes 55 and 61.

Reference numeral 67 denotes a photoelectric weft yarn detector, which is equipped with a light projector 68 and a light receiver 69 as shown in FIG. The motor 2
The operation of 3 is controlled.

For details, referring to FIG. 5, the comparison circuit 70 compares the signal from the light receiver 69 with the reference signal from the reference value setting circuit 71, and when the signal from the light receiver 69 is larger, that is, the roller frame Weft 1 on 34
1 is consumed and the resulting diffuse reflection disappears, and a large amount of light from the emitter 68 is reflected from the circumferential surface of the drive roller 35B and enters the light receiver 69, the output of the comparison circuit 70 becomes H. level, and the switching circuit 72 is made conductive (ON). Through this conduction, the DC power supply 73 is connected to the motor 23 via the current control circuit 74 for speed change, so that the motor 23 and therefore the rotating shaft 22 are rotated. The winding pipe 25 is configured to rotate around the roller frame 34.

Next, the action will be explained.

Due to the rotation of the motor 23, the winding pipe 25 together with the rotating shaft 22 rotates in the direction of arrow A in FIG.
wrapped around. Of course, the entire roller frame 34 is held stationary.

Further, due to the rotation of the rotating shaft 22, the drive roller 35A is
.about.35B rotate in the direction of arrow B in FIG. 2, respectively. This rotation causes the weft 11 wound around the roller frame 34 to move around each roller 35A to 35C, 4
Since the weft yarns 11 are sequentially fed to the unwound end side of the roller frame 34 by the inclinations 9A to 49C, the wound weft yarns 11 are spaced apart as shown in FIG. This interval (winding pitch) is the distance between rollers 35A to 35
C, determined by the inclination of 49A to 49C and the rotation speed. Therefore, when changing this interval, the inclination of the support frames 37A to 37C with respect to the bracket 40 may be changed. That is, bolt 3
The inclination angles of the drive rollers 35A to 35C can be adjusted by loosening the bolts 9 and moving them within the arc-shaped adjustment holes 80, and then tightening the bolts 39 at predetermined positions. Note that the inclination angles of the drive rollers 35A to 35C may not be the same.

When the wound weft yarn 11 reaches the weft yarn detector 67, the light from the emitter 68 is diffusely reflected by the weft yarn 11 and the amount of light entering the light receiver 69 is reduced. The switching circuit 72 becomes non-conductive (OFF) due to the L level signal, and the motor 23 stops. This stops the winding.

On the other hand, a cam 62 rotating in relation to the main shaft of the loom
As a result, the locking body 57 moves into and out of the through holes 55 and 61 of the covers 54 and 60 via the lever 64 and the wire 66.

That is, to explain with reference to FIG. 7, air injection from the weft insertion nozzle 15 is started prior to weft insertion. Immediately after that, the locking body 57 is inserted into the through holes 55 and 6.
Exit from 1. As a result, the weft yarn 11 is unwound and pulled out from the unwound end side of the roller frame 34 by the traction force of the weft insertion nozzle 15 while causing ballooning, and is inserted into the opening of the warp yarn 1. still,
A ballooning cover may be provided between the roller frame 34 and the weft guide 14 to control the magnitude of ballooning. During this weft insertion, the weft thread 11 is pulled out while rotating around the roller frame 34, so the timing at which the weft thread 11 reaches the locking body 57 is indicated by T ₁ , T ₂ , and T ₃ in FIG. It is shown.

The locking body 57 passes the weft 11 for the third time (T ₃ )
After that, it immediately rushes into the through holes 55 and 61. Therefore, when the weft yarn 11 arrives for the fourth time, the weft yarn 11 is locked by the locking body 57, and weft insertion is completed. Before this, air injection from the weft insertion nozzle 15 has been stopped.

When weft insertion is performed in this way, the weft detector 6
Since the weft 11 is missing in the part 7, the receiver 69
The amount of light entering the area increases. Therefore, the comparison circuit 70
It is determined that the voltage exceeds the reference level, and the switching circuit 72 is made conductive. As a result, the motor 23
rotates to wrap the weft 11 around the roller frame 34 to maintain a predetermined amount. It is preferable that the winding speed is faster than the consumption speed of the weft yarn 11. Therefore, a current control circuit 74 is provided for speed change so that the rotational speed of the motor 23 can be changed in accordance with the consumption speed of the weft yarn 11.

Next, when changing the weft insertion length of the woven fabric 7, the support shafts 5 of the driven rollers 49A to 49C
Loosen the nuts 53 of 0A to 50C (or at least one of these) and adjust the adjustment holes 52A to 52A.
2C and fixed again in place. This changes the circumferential length of the roller frame 34, so the weft insertion length can be changed. That is, since the weft insertion length is regulated by the locking body 57, the circumference is always adjusted so that the number of unwindings is an integral number.

Next, the effect of adjusting the inclination of the drive rollers 35A to 35C will be explained with reference to FIG.

Reference numeral 91 indicates the axis of the rotating shaft 22 (skelet frame axis), and 92 indicates the central axis of the drive roller 35B, which intersect at an angle α when viewed from directly above.

Here, the weft 11 is wound in a direction perpendicular to the axis 91 and sent in a direction perpendicular to the central axis 92. In other words, the weft yarn 11 is fed with a deviation from the advancing direction line 93 by an angle α, and is moved to the right side in the figure. Since this is done for all the rollers, all parts are wrapped around the roller frame 34 with equal pitch. Therefore, by appropriately adjusting this angle α, the pitch of the thread to be wound can be changed.

For example, in the case of a thick yarn, the inclination angle α is increased and the pitch is wound as shown in FIG. 9A, and in the case of a thin yarn, the pitch is wound as shown in FIG. Since the ratio of the projected cross-sectional area to the range becomes extremely low, the inclination angle α is made small and the winding is performed at a pitch as shown in FIG.

In the above embodiment, all the rollers are tilted in the same way, but the driven rollers 49A to 49C
There is no need to tilt it.

Further, in the above embodiment, the winding amount of the weft yarn 11 on the roller frame 34 is detected and the weft yarn 11 is always wound around the roller frame 34 so that the winding amount is always at least a certain amount. The weft yarn 11 may be rotated an integral number of times per one rotation of the main shaft in conjunction with the main shaft, so that one pick of weft 11 is wound per one rotation of the main shaft.

Furthermore, in the above embodiment, the weft 11 is wound around the roller frame 34 by keeping the roller frame 34 stationary and rotating the wrapping pipe 25 around it, but the wrapping pipe 25 is fixed in position. The winding may be performed by rotating the roller frame 34. In that case, the locking body 57
may be held within the roller frame 34 so as to protrude and retract.

<Effects of the invention> As explained above, according to the invention, not only can the weft yarns be wound and stored in an orderly manner at intervals around the roller frame without overlapping, etc., but the intervals between the weft yarns can be easily adjusted. Since the yarn can be adjusted to the desired condition, it is possible to store the yarn in an optimal condition depending on the yarn used.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention, in which FIG. 1 is a front longitudinal sectional view of the weft storage device, FIG. 2 is a side view of the same, FIG. 3 is a plan view of the same, and FIG. The figure is a bottom view of the inclination angle adjusting device section, FIG. 5 is a schematic diagram of the control circuit section, and FIG. 6 is a plan view of the entire loom. Further, FIG. 7 is an operation timing chart of the main devices in the same embodiment, and FIGS. 8 and 9 are schematic diagrams for explaining the effects of adjusting the inclination of the rollers. 10... Yarn feeder, 11... Weft, 13... Weft storage device, 15... Weft insertion nozzle, 22... Rotating shaft, 23... Motor, 25... Wrapping pipe, 31
... Stationary support, 34 ... Roller frame, 35A-3
5C... Drive roller, 37A-37C... Support frame, 39... Bolt, 40... Bracket, 42
A~42C...Pulley, 45...Belt, 49A
~49C...Followed roller, 57...Locking body, 62
...Cam, 67...Weft detector, 80...Adjustment hole.

Claims (1)

[Scope of utility model registration request] Multiple rollers 35A to 35C, 49A to 49C
The weft yarn 11 from the yarn supplying body 10 is wound around a roller frame 34 which is arranged in a skein frame shape so that some or all of their center axes are not included in any plane including the skein frame axis. , at least one of the inclined rollers 35A to 35C is driven to rotate around its central axis, and the weft 11 is wound around the roller frame 34.
In the weft storage device 13 of the loom, which stores the weft while moving it forward toward the end of the roller frame 34 on the weft insertion means 15 side, the inclination angle of at least one of the rotationally driven rollers 35A to 35C is adjusted. Adjustable tilt angle adjustment devices 37A to 37C,
39, 40, and 80.