JPS61215741A - Storage apparatus for yarn material in 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 The present invention comprises an essentially cylindrical winding body and a material supply tube, wherein one of the winding body and the material supply tube is A thread-like material in a loom, such as thread, wire, etc., which is configured to rotate relative to another
This relates to a device for storing belts, etc. (In the following, it is assumed, for example, that the non-rotatable winding is a body, a material supply tube that rotates relative to it, and a thread as wefting material.) Prior art of this kind device (German patent no. 211167)
No. 1 or corresponding U.S. Pat. No. 3,759.3
In the case of (No. o o), a ring is provided which surrounds the side end of the winding body with a slight gap, so that the weft thread to be wound can be
The wrapping is prevented from arriving behind the body in an undesirable manner (so-called "back wrapping"), allowing it to be wound onto its axis. In this case, the wrapping creates a gap between the body and the ring which avoids back wrapping, especially when particularly delicate and thin threads are to be processed.
Keeping it small enough is not at all easy. The rotational speed of the thread supply tube and therefore of the protective ring rotating therewith is usually abnormally high, for example 5,0OOR0P,
M, and therefore the clearance cannot be less than some small minimum amount, for example 0°51m. In the case of thin threads, undesirable back wrapping can therefore nevertheless occur.

In the case of this known storage device, - times, when a portion of the thread reaches the back of the body in an undesirable manner, during subsequent wrappings, the winding towards the front is It is not considered that it will be restored on top of the . Rather, the following pieces of thread are
The rear wrap stays in space and the wrap wraps further over the body axis. This fault is discovered only when the loom is stopped, due to a break in the weft thread, and can only be removed at additional cost. This is because a large number of loops are wrapped around the body multiple times.

Problem to be Solved by the Invention The present invention is based on the problem of obtaining an improved storage device in view of this.

The present invention is designed to prevent windings directed towards the material supply tube into the end of the body, while this winding inadvertently winds the part of the material wrapped behind the end of the body. It is characterized by at least one hook-shaped recess lying thereon for the purpose of turning it back up.

This ensures that once, for some reason, the part of the weft thread to be wrapped has reached the back of the body, this thread connection will be removed during subsequent rotations of the feed tube.
Immediately the wrapping is again brought back onto the body.

Therefore, at most some loops, usually only partial loops of the coil, can only reach behind the body and in the region of its axis. Therefore, repair of such faults is facilitated.

During subsequent wefting, the part of the weft thread wound at the back can be automatically pulled forward again. Operation of the storage device and operation of the loom can continue without disturbance. The weft thread does not break due to this minimal back wrapping. Therefore, the loom is not stopped.

Furthermore, the winding also eliminates the creation of the smallest possible clearance between the body and the protective ring installed in the known device, which prevents back winding. Even back winding, which is a problem in the case of the thinnest threads, can thus be avoided.

Furthermore, the avoidance of back-wrapping that the present invention incorporates does not require the installation of additional elements such as protective rings in known storage devices. The hook-shaped recess is attached to the body itself.

The weight and inertia of the thread supply tube and the parts rotating therewith remain unchanged.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Other features of the present invention will become apparent from the following description of the embodiments based on the accompanying drawings.

A conical element 6 is fixed onto a stationary base disk 1 having an axis 2, the axis of which is marked 4. The axis 2 and the axis 4 do not coincide with each other, so that the conical member 3 is arranged eccentrically above the disc 1. In FIG. 1, the conical member 3
A yoke 5 is arranged in the lower half of the yoke. Together with the upper part of the conical member 3, these yokes 5 form a convolution, generally designated 6. Around these yokes 5, during operation, a weft thread 9 is wound onto the body 6 through a thread feed tube 8 which continuously rotates as indicated by the arrow 7. Supply pipe 8
The end 60 of the winding body 6 facing towards the base disk 1
is formed by. This end 60 is shown in FIG.
It is surrounded by a cover-like, conically shaped member 50, which is shown only schematically. The supply pipe 8 is connected to the member 1
and 50. Such a weft yarn storage device is described in DE 2751580 or corresponding US Pat. No. 4,132,370.

During operation, several thread loops 9a are in each case moved to the right between two pins 12 which are moved in the direction of the axis 2.4 indicated by the arrow 11 and thus to the right in FIG. After the lowering of the frontmost pin 12a, it is freed, as indicated by the arrow 16, for wefting, and the winding is pulled away from the body 6.

For example, when the feed tube 8 has to be rotated in the opposite direction according to the arrow 14, as shown in FIG. , and then reaches position 8b shown in FIG.
Also shown in FIG. 3 is the stationary yoke 16, which captures the top of the pin 12 and whose wrap prevents rotation of the body.

The position 8b shown in FIG. 3 is the turning position of the tube 8; from this position 8b the tube 8 is again moved forward, as indicated by the arrow 7, after which the weft section is removed. removed. In this case, the weft thread 9 forms a downwardly hanging loop 91) (FIG. 2) which, when the tube 8 advances further (position 8c in FIG. 4), hangs particularly widely downwards. This produces a thread loop 9C.

When the yarn supply tube 8 reaches the position 8d shown in FIG. 5, the weft yarn section 10, which is indicated by a dashed line in FIG. After rotation of the supply tube 8 to the position 8e shown in FIG.
Portion 9 inside the recess 21 provided around the base disk 1
f and is therefore returned again onto the front side of the base disk 1.

The recess 21 has a progressively inwardly extending entry channel 22 through which the thread section 10 can be connected to the supply tube 8
is gradually lowered during rotation in the direction of arrow 7. Finally, at the bottom or deepest point 23 of the recess 21, a sharp outwardly directed belly 24 is formed for the capture of the thread section 10. The recess 21 therefore has the shape of a hook with a tip 40, in which case in the direction of rotation 7 the thread first reaches above the entry belly 22 and is then captured. From the layer 24 it is returned onto the front side of the base disk 1, which is shown diagrammatically on the right in FIG.

Upon subsequent rotation of the feed tube 8, the winding again results in a normal thread loop on the body 6.

After repair of the thread during the next wefting, the group of windings containing the first, back-wound thread section 10 is removed so that when the winding is removed from the body 6, the thread section 10 is also aligned. I am drawn to various things. Naturally, therefore, the back-wound weft thread section, and thus the weft thread section 10 which is behind the base disk 1 in FIGS. 1 to 6, can be removed from the storage device. Therefore, the defective back wrap is automatically removed and operation continues in a normal manner.

For other reasons, during operation, when the thread section 10 in FIGS. is slid over the front side of the disc 1 again, and immediately the thread supply tube 8 passes over the depression 21. Therefore, a longer piece of weft can never reach above the side of the back disc 1 on the left in FIGS. 1 to 6, but on that side the weft thread is Now you can wrap it around 2 or 4. At the latest, after several loops, the weft thread reaches again on the front side of the disk 1 and the winding is carried out further in the desired manner. The operation of the loom is thus only slightly disturbed or not totally thermally disturbed.

According to other structures, for example, three depressions 21° 21a
, 21b (see FIG. 1) are provided on the base disk 1. In this case, the back-wrapped thread portion 10 is
It merely extends over a relatively short arc section of, for example, 120°. Repair or automatic return of the thread 10 is then made easier.

In the construction according to FIGS. 7 and 8, on the shaft 2 a coaxial, non-rotatable winding drum 28 is arranged. This drum 28 has a ridge 29 on its front end 50. In this protuberance 29, a recess 21 is provided, corresponding to FIGS. 1-6. The weft thread 9 is drawn off over the head of the L drum 28 in this embodiment.

In a variant embodiment, the thread supply tube 8 is stationary and the drum 2
8 relative to the tube 8. In the structure according to FIG. 9, the capture membrane 24a and the slit of the recess 21 extend in the circumferential direction. The distal end portion 40 is curved slightly to the left in FIG. The capture effect is therefore improved.

The present invention, having the above-described structure and operation, provides a storage device for filamentous material in a loom, which eliminates the drawbacks of conventionally known devices.

[Brief explanation of drawings]

1 is a schematic perspective view of a weft storage device formed according to the invention; FIGS. 2-6 are perspective views of the device shown in FIG. 1 in various positions; FIG. FIG. 8 is a partial perspective view of the apparatus shown in FIG. 7, and FIG. 9 is a detailed view of a modified embodiment. 6. Winding body: 8. Thread supply tube; 10. Thread part; 21. Indentation; 22. Entry membrane; 24. Capture membrane;
30...end; 40...tip 0

Claims (1)

[Claims] 1. An essentially cylindrical winding body (6) and a material supply pipe (
8), in which one of the winding body (6) and the material supply pipe (8) is formed to rotate relative to the other. material,
For example, in storage devices for wefts, wires, strips, etc., the end (30) of the wrapping (6) facing towards the material supply pipe (8) may be accidentally End (30)
Wrap the part (10) of material wrapped behind the body (
6) Storage device, characterized in that at least one hook-shaped recess (21) is arranged for returning to the top. 2. An entry belly (22) in which the recess (21) gradually extends inward in the direction of relative rotation of the material supply pipe (8);
2. A storage device according to claim 1, further comprising a catch ring (24) for a portion (10) of incorrectly wrapped material which is successively directed sharply outwards. 3. The capture belly (24) has a material supply pipe (8) at its outer end.
3. Storage device according to claim 1 or 2, terminating in a tip (40) oriented opposite to the direction of relative rotation of the storage device.