JPS6119744B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a grip for wefting driven by a flexible wefting band and a grip located above the wefting band in an area connected to the grip. The present invention relates to a grip type loom having a reinforcing member.

In known grip looms of this type, one band wheel is arranged on each side of the loom, and one end of the weft band is fixed onto each of these band wheels. There is. A grip for wefting the weft yarn is attached to the other end of each wefting band. These wefting bands are driven oscillatingly by a band wheel, in which case the band is continuously and alternately wound up and unwound onto and from the band wheel. In that case, especially
In the vicinity of the attachment point of the grip onto the weft band, bending stresses occur, caused by the flapping movement of the head of the grip, which can lead to breakage of the band.

In order to avoid this risk of breakage and to stabilize the running of the grips, it has been proposed to provide the weft band with reinforcement at the end supporting the grips. One known solution consists in that the wefting band is provided with transverse projections in the end region, and in another known solution, the wefting band is reinforced in the end region. It is to be uniformly connected to the strip.

Practical tests of these solutions have shown that with them the flapping movements of the grips cannot be completely avoided and that the above-mentioned failures still occur. Furthermore, it has been found that as the number of wefts increases, the grip is deflected from its horizontal trajectory at its turning point. At the outer turning point, and thus at the beginning of weaving, the grip is lifted obliquely upwards from its path, and at the inner turning point, the grip is pushed downwards. This means that in the first case the grips come into contact with the warp threads at the top end, damaging them and penetrating these warp threads and coming out of the shed, while in the latter case the grips contact the warp threads at the upper end and cause damage, and in the latter case both mutually The result is that the grips that are forced into the can be mutually damaged.

In known grip looms, the grips are attached to the weft bands in most cases by brazing, and only in a few cases by screws. Brazing is a very complex process and requires the highest level of skill on the part of the operator. Moreover, the local heating caused by the brazing process of the gripping and wefting bands often causes distortion of the wefting bands, which cannot be removed by subsequent straightening. Or it can only be removed by difficult operations.

Screwing the grip onto the weft band is not practicable. This is because, on the one hand, such a screwed connection does not have the necessary stability, and on the other hand, the weft band has a slight
This is because the screw attachment points, which are usually only two at most, are subject to excessive wear.

By means of the invention, the known wefting bands with grips fixed thereto are, on the one hand, such that both the risk of breakage of the grips and the tendency of the grips to depart from the horizontal trajectory at their point of movement reversal are reduced; Must be improved. On the other hand, it must be ensured that the grip is easily fixed to the wefting band without the stability of this fastening being impaired due to the sticking or the wefting band being overloaded.

According to the invention, this problem is solved by the fact that, on the one hand, the reinforcing member is removably connected to the wefting band, and on the other hand, the grip is connected to the reinforcing member and/or the wefting band, respectively. resolved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings showing one embodiment thereof.

The grip 1, shown in FIGS. 1-4, is driven by a flexible steel band 2, with its front and rear side walls 4 folded at its rear end.
a substantially square cross-section base body 3 having from 5 to 5;
It is established from The side walls 4 and 5 are connected at the upper part by a ceiling surface 6 having many holes.
A long clamping tongue 8 is fixed to the base body 3 by two screws 7, and a thread turning surface 9 is machined in the rear side wall 5, which projects into the interior of the grip. As a result, the weft yarn S fed almost horizontally to the grip 1 by the yarn guide 10 is
It is guided approximately vertically away from the clamping area of the clamping tongue 8. Note that the weft thread S passes through a guide slit 13 between the tips 11 and 12 of the grip 1.
, and from there it reaches the yarn turning surface 9.

The side walls 4 and 5 are led oppositely in the region of the rear end of the grip 1 and delimit the gap by their inner corners. In this gap,
The front end portion 14 of the rail-shaped reinforcing member 155 protrudes. The side walls 4 and 5 are secured to the front end 14 of the reinforcing member 15 by screws 16. The reinforcing member 15 is screwed onto the weft band 2 by screws 17 and nuts 18, the band 2 having an upwardly arched recess 19 in the screwed area. A nut 18 is inserted into it from below. As can be seen from FIG. 5, in the region of the recess 19, on the one hand, the lower corner of the reinforcing element 15;
A band-shaped washer 20 is arranged between the weft band 2 and the head of the nut 18, and on the other hand, between the weft band 2 and the head of the nut 18. The reinforcing member 15 is arranged along the central axis of the wefting band 2, and is placed upright on the recess 19 with the edge facing down. The length of the reinforcing member 15 is
At least the length of grip 1 should be approximately equal to or 80% or more.

In addition to the fastening by the screw 16 at the front end 14 of the reinforcing element 15, the grip 1 is additionally screwed to the weft band 2. This means that the screw 7 serving for the fixing of the clamping tongue 8 and the nut 21 inserted in a recess 22 provided at the front end of the weft band 2
It is carried out by. Within the area of the depression 22,
A washer 20 is similarly placed between the weft band 2 and the head of the nut 21 on the one hand, and between the weft band 2 and the bottom of the base 3 on the other hand.
are arranged (Figure 4).

A detailed description of the grips is omitted here as the details of the structure of the grips are not critical to the present invention, but for this purpose reference is made to U.S. Pat. No. 4,071,055. sea bream. The grip described in this US patent corresponds to the illustrated grip 1 except for its rear part in the area of attachment of the grip onto the weft band. Of course,
Each of the other known grips can also be modified so that the fixing means described above can be applied. In particular, this fastening means is not limited to conveying grips, ie grips that weft the weft yarn into half of the thread, but can also be applied to receiving grips. Regarding receivers, reference is made in this connection to US Pat. No. 4,062,382.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the weft band together with the grips and reinforcing members fixed thereon;
The figure is a partial front view seen in the direction of the arrow in Figure 1, Figure 3 is a partial plan view seen in the direction of Figure 2, and Figure 4 is a partial front view seen in the direction of the arrow in Figure 2.
The figure is an enlarged sectional view taken along the - line in FIG. 2, and FIG. 5 is an enlarged sectional view taken along the - line in FIG. 2. 1...grasp, 2...horizontal band, 4,5
... Side wall, 7, 17 ... Screw, 8 ... Tightening tongue,
14... Front end portion, 15... Reinforcing member, 18, 21
...Natsuto, 19, 22...Reinforcement hollow.

Claims (1)

[Scope of Claims] 1. A grip for wefting driven by a flexible wefting band, and a reinforcing member arranged on the wefting band in an area connected to the grip. In the grip type loom having the following, on the one hand, the reinforcing member 15 is removably connected to the weft band 2, and on the other hand, the grip 1 is removably connected to the reinforcing member 15 and/or the weft band 2. A grip-type loom characterized by: 2 The reinforcing member 15 is attached to the weft band 2, and
The grip 1 attaches to the reinforcing member 15 and/or the weft band 2 with screws 17, 18 or 16, 7, 2.
1. A loom according to claim 1, which is connected by a loom. 3. The reinforcing member 15 has a long rail shape, stands upright on the weft band 2 with its edge facing down, and is screwed along its central axis. loom. 4 The screws 17 between the reinforcing member 15 and the wefting band 2 are led vertically through the reinforcing member 15 from above, and the wefting band 2 is arched upward in the area of these screws 17. 4. Weaving machine according to claim 3, characterized in that the weaving machine is provided with reinforced recesses (19) into which nuts (18) pointing towards the screw are inserted from below. 5. The grip 1 has front and rear side walls 4, 5 which are led oppositely in the region of the rear end of the grip 1 and bound a gap by their inner surfaces. This gap is the reinforcing member 15
Claim 3 surrounding the front end 14 of the
The loom mentioned in section. 6. A loom according to claim 5, wherein the grip 1 and the reinforcing member 15 are screwed together in the region of the gap. 7 The grip 1 is connected to the weft band 2 by screws 7 led vertically through the grip 1 from above, and the weft band 2 is arched upward in the area of these screws 7. A reinforcing recess 22 is provided, into which a screw 7 is inserted from below.
The loom according to claim 2, wherein a nut 21 attached to the loom is inserted. 8. A loom according to claim 7, wherein the grip 1 is provided with a clamping tongue 8, which clamping tongue 8 is fixed to the grip 1 by the screw 7. 9. The loom according to any one of claims 1 to 8, wherein the length of the reinforcing member 15 is at least 80% of the length of the grip 1. 10. The loom according to any one of claims 1 to 8, wherein the reinforcing member 15 has at least the same length as the grip 1.