JPS5943416Y2 - Weft storage device for shuttleless looms - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a weft storage device for a shuttleless loom that uses fluid to temporarily store weft yarns.

The weft yarn is pulled out from the weft supply section installed on the side of the machine base, is carried by the fluid jetted from the intermediate storage fluid injection device, and is temporarily stored in a U-shape, before being inserted into the weft. The method to do this has been generally known.

For example, as shown in the example of the jet loom in FIG. 1, the weft Y pulled out from the weft supply section (not shown) passes through the storage fluid ejecting device 1, and the fluid ejected from the storage plate 2 In order to be fed out to the upper storage section and pulled out through the fixed guide 3, it is stored in a U-shape.

The weft yarn Y leaving the guide 3 passes through a gripper 4 that reciprocates and repeatedly holds and releases the weft yarn, and is inserted by a weft jet nozzle 5.

In such a conventional device, if the machine stops during operation due to a weft insertion error or warp thread breakage, or if the machine is stopped as necessary, the machine will stop before weft insertion starts. Since the weft is set to be in the same state as , the weft remains stored in a U-shape on the storage plate 2.

Therefore, the weft yarn Y1 fed out onto the storage plate 2 is under tension due to the fluid ejected from the storage fluid injection device 1, but the weft yarn Y2 on the drawing side is not subjected to the weft insertion action. Therefore, it is in a tension-free state without any restraints.

As a result, the drawn-out survey line yarn Y2 is strongly untwisted and becomes entangled with the weft yarn Y1 like Y3, causing twisting.

In this way, if the machine is restarted while the stored weft yarn is kinked, the kinked portion Y3 will pass through the gripper 4 and reach the weft injection nozzle 5. This is a major cause of weft insertion errors, such as the twisted part of the weft becoming jammed and making it impossible to insert the weft.

For this reason, in the past, as shown in Fig. 2,
As disclosed in the invention of No. 0542, in addition to the storage fluid ejecting device 1 for applying tension to the weft Y1 on the weeding side, tension is applied to the weft Y2 on the drawer side to transfer it to the weft Y1 on the weeding side. A weft storage device has been proposed in which an auxiliary fluid injection device for separating the weft from Y1 is disposed in the weft storage section.

That is, in this storage device, the auxiliary fluid injection device is linked to the movement of the gripper 4, and when the gripper 4 grips the weft Y, the auxiliary fluid is also injected from the auxiliary nozzle 6 to form the weft Y into a U-shape. The weft yarn Y is stored and held in a certain shape, thereby preventing the weft yarn Y from twisting during storage.

Therefore, with this device, it has become possible to prevent the weft Y from twisting during storage.

However, in this device, when the machine is stopped due to weft breakage, pressure fluid is always injected from the auxiliary nozzle 6 as well.

Therefore, if this weft yarn breakage occurs near the storage ring I, guide 3, gripper 4, or weft injection nozzle 5, the pressure fluid from the auxiliary nozzle 6 will instead interfere with the next weft threading operation. It was something like that.

In other words, if weft breakage occurs as described above,
It is safe to pass the weft Yt through the storage ring I, guide 3, gripper 4, etc. again, but if a jet stream is coming out from the auxiliary nozzle 6 at this time, it will be difficult to pass the weft Y through the guide 3 in particular.C be.

Therefore, in this conventional device, when threading the weft, the operator covers the opening of the auxiliary nozzle 6 with his hand to stop the air flow through the nozzle 6, and threads the weft in this state.

The present invention is equipped with a cock so that the air flow from the auxiliary nozzle can be freely stopped, thereby eliminating the troublesome effort of covering the auxiliary nozzle with two hands. It is an object of the present invention to provide a weft storage device for a shuttleless loom that allows easy weft threading work after breakage.

Hereinafter, the present invention will be explained based on illustrated embodiments.

3 to 7 show an embodiment of the present invention, in which a storage fluid ejecting device 1 is provided on a pedestal 32 constituting a weft storage section, and its nozzle 8 penetrates a frame 9 fixed to the pedestal 32. It opens toward the weft storage section.

The storage fluid ejecting device 1 is connected to a pressure fluid source (not shown) and constantly injects pressure fluid through the nozzle 8 as well.

A distribution hole 10 for fluid distribution is bored in the frame 9, the outer end of which is sealed with a screw 11.

A plurality of auxiliary nozzles 6 that are open to the weft storage section are connected to the distribution hole 10 so as to apply a predetermined tension particularly to the draw-out side weft Y2, thereby forming an auxiliary fluid injection device.

On the other hand, the storage fluid ejecting device 1 has a slit 12 with respect to the opening of the nozzle 8.
The draw-out side weft Y2, which forms a storage section for the weft Y1 which is fixed to and drawn out by steam, and which reaches the guide 3 through the slit 12 of the storage ring 7, exists in the air.

The gripper 4, which grips the weft yarn that passes through the guide 3 provided near the weft storage device and continues to the weft injection nozzle 5, which is the weft insertion mechanism, has a structure shown in FIG. 6 and FIG.

That is, the T-shaped main body 14 is attached to the frame 13 with the screw 14.
Fixed by 1.

A defined weft holding member 15 is placed on the upper surface of the main body 14 and is fixed by a screw member 16.

Further, a rod 17 is slidably passed through approximately the center of the main body 14, and a movable weft holding member 18 is fixed to the upper end of the rod 17.

The rod 17 is urged downward by a spring 19 at the lower end, and the f-most surface is moved upward for a predetermined period of time by a suitable push-up mechanism such as a cam (not shown) in synchronization with the weft insertion action. There is.

Further, the rod 17 is partially cut out around the periphery, and a space 20 is formed between the rod 17 and the inner circumferential direction of the main body 14.

A supply port 21 connected to a pressure fluid source and a fluid discharge port 22 are attached to the main body 14 side, and communicate with the space 20 through through holes 23 and 24, respectively.

Among these, the supply port 21 is always in communication with the space 20, and the discharge port 22 is cut off from communicating with the space 20 when the rod 17 moves upward, that is, when the weft is released, and when the rod 17 moves downward, that is, when the weft is clamped. It is arranged so as to communicate with the space 20.

The gripper 4 thus constitutes a fluid switching valve.

The inner end of the distribution hole 10 of the auxiliary fluid injection device is connected to the outlet 22 of the gripper 4 through a pipe 25, and the fluid flowing out from the outlet 22 is injected from the auxiliary nozzle 6 through the distribution hole 10. .

A cock C is provided at the inner end of the distribution hole 10 to stop the fluid sent from the outlet 22 of the gripper 4 to the auxiliary nozzle 6.

A valve hole 26 constituting this cock C is bored so as to extend rearward from the front surface (lower surface in FIG. 3a) of the frame 9, and intersects with the distribution hole 1o.

A cylindrical cock body 27 is inserted into the valve hole 26 from the front.
is inserted and is rotatable within the valve hole 26.

The side part of the cock body 21 becomes a reduced diameter part 28 and the frame 9 force 1
・Protrudes forward.

Further, a communication hole 29 is formed at the inner end of the cock body 27 and passes through the cock body 27 in the diametrical direction.
The vibrator 25 side portion of No. 0 is communicated with the auxiliary nozzle 6 side portion.

When the cock body 2γ is rotated as shown in FIG. 3, the distribution hole 10 is blocked by the cock body 27 portion.

Further, a seal ring 30 is provided on the outer periphery of the outer end of the cock body 27.
is wrapped around the cock body 27 to seal between the cock body 27 and the valve hole 26.

A disk-shaped lid 31 is fixed to the front of the frame 9 corresponding to the cock body 27, and prevents the cock body 27 from coming off forward.

In particular, the cap body 31 has two bolts 33 as shown in FIG.
The cock body 2T is fixed to the frame 9 with a diameter reducing portion 28 rotatably protruding forward from the center thereof.

At the proximal end of the protruding portion of the reduced diameter portion 28, a Stohar ring 3 is provided.
4 is attached, and a lever 35 for rotating the cock body 27 is attached to the protruding end of the reduced diameter portion 28.

In the above configuration, when weft insertion by the weft injection nozzle 5 is completed during operation, the rod 17 of the gripper 4 is moved downward, and the movable weft pinching member 18 pinches the weft Y between it and the fixed weft pinching member 15. .

Therefore, the weft yarn Y being let out from the fixed weft supply member passes through the nozzle 8 by the fluid jetted by the storage fluid jetting device 1, and is jetted out to the storage section on the pedestal 32. It is stored sequentially in the shape of a letter.

At the same time, the downward movement of the rod 17 causes the through hole 2 of the discharge port 22 to
4 communicates with the space 20, the pressure fluid on the supply port 21 side passes through the through hole 23, the space 20, the through hole 24, the discharge port 22, and the pipe 25, and passes through the cock C and the distribution hole 10 to the auxiliary nozzle 6. Injected.

Then, this fluid acts on the draw-out side weft Y2 so as to apply tension in the direction of separating it from the pay-out side weft Yl.

Subsequently, when a predetermined amount of weft yarn has been stored, the rod 17 of the gripper 4 is moved upward by an appropriate drive mechanism, and the movable weft holding member 18 releases the weft Y, as shown in FIG.
Weft insertion is performed by the weft jet nozzle 5.

At the same time, the through hole 24 of the outlet 22 of the gripper 4 opens into the space 2.
o, and fluid injection from the auxiliary nozzle 6 is stopped.

Therefore, during weft insertion, the influence of the fluid on the draw-out side weft Y2 is eliminated.

Furthermore, when the machine is stopped, the machine is set to stop before weft insertion starts, so the weft is stored in the weft storage section on the pedestal 32 in an approximately U-shape. As shown in FIG. 7, the gripper 4 is in a state in which the movable weft clamping member 18 moves downward to clamp the weft.

Therefore, since the supply port 21 and the discharge port 22 are in communication, fluid bq is ejected from the auxiliary nozzle 6, and the draw-out side weft Y2 is under tension in the direction of separation from the pay-out side weft Y1, and is stopped. Twisting of the weft threads in the storage section inside is prevented.

Note that when the fluid is ejected from the auxiliary nozzle 6 in this manner, the fluff on the pedestal 32 is removed.

By the way, if the stoppage of the machine is caused by a weft breakage occurring near the storage ring 7, the guide 3 gripper 4, or the weft injection nozzle 5, the weft yarn Y should be moved to the storage ring 7, the guide 3 again. It is necessary to pass it through etc.

Therefore, at this time, the lever 35 of the cock C is turned to the position indicated by the two-dot chain line in FIG. 4, and the communication hole 29 of the cock body 27 is moved to a position where it does not communicate with the distribution hole 10, as shown in FIG.

Then, the pipe 25 side portion of the distribution hole 10 and the auxiliary nozzle 6
The side portions are separated from each other.

Therefore, the injection of pressure fluid from the auxiliary nozzle 6 is stopped.

Therefore, if the weft thread threading is carried out in this state, this work can be carried out easily without being hindered by the auxiliary air flow.

In this case, of course, there is no need to cover the opening of the auxiliary nozzle 6 with your hand.

After threading the weft thread, return the lever 35 of the cock C to its original position and use the communication hole 29 to connect the vibrator 25 of the distribution hole 10.
The side portion and the auxiliary nozzle 6 side portion are communicated again.

It should be noted that the cock C in the above embodiment may be of any type as long as it can stop the passage of the fluid flowing from the gripper 4 to the auxiliary nozzle 6, so it may be replaced with ordinary pulp.

As described in detail above, the present invention provides a cock to stop the passage of fluid in the middle of the fluid passage from the gripper to the auxiliary fluid injection device, so that when the machine stops due to weft breakage, the auxiliary fluid can be This is a practically preferable device for a weft storage device in a shuttleless loom because it has the effect of easily stopping the flow and facilitating the weft thread threading operation.

[Brief explanation of the drawing]

Figures 1 and 2 are road body plan views of a conventional weft storage device;
Fig. 3a is a road body plan view of a weft storage device embodying the present invention, b is a partial plan view showing the cock in a closed state, Fig. 4 is a front view of the cock portion, and Fig. 5 is a side view of FIG. 3a, and FIGS. 6 and 7 are sectional views of the gripper when the weft is released and when the weft is clamped, respectively.

Claims (1)

[Scope of Claim for Utility Model Registration] l A weft storage section that temporarily stores the weft fed from the weft supply section using fluid, and a weft storage section that is arranged between the storage section and the weft insertion mechanism to intermittently pinch the weft. an auxiliary fluid injection device having a gripper, a fluid injection device for weft storage provided in the weft storage section, an auxiliary nozzle that opens toward a draw-out side portion of the stored weft, and a distribution hole interlocked with the nozzle; In a shuttleless loom in which the auxiliary fluid injection device is configured to interlock with the operation of the gripper and inject fluid during the weft clamping operation of the gripper, a part of the distribution hole has the above-mentioned A weft storage device characterized by being provided with a loop for stopping the passage of fluid flowing from the grippani to the auxiliary nozzle. 2. The auxiliary fluid ejecting device is composed of a distribution hole formed in the frame, a plurality of auxiliary nozzles opened from the distribution hole toward the weft storage section, and a pipe connecting the distribution hole and the gripper. Scope of utility model registration claims stated in paragraph 1 □
Weft storage device. 3. The valve is a cock installed between the pipe side part and the auxiliary nozzle side part of the distribution hole, and the cock has a communication hole that communicates with the distribution hole and a rotatable cock body. , and a lever for rotating the cock body. The weft storage device according to claim 2, which is a registered utility model.