JPH0546983U - Inserting rapier for shuttleless loom - Google Patents

Abstract

(57) [Abstract] [Purpose] In a rapier loom, when the weft is not cut when the weft is inserted, the weft is released from the weft gripping portion to prevent the warp cutting trouble caused by the weft cutting mistake. [Structure] In an insertion rapier of a rapier loom, a stopper provided at the rear of the weft gripping portion is provided with a movable stopper that releases this stopper function when the weft exceeds a certain tension and discharges the weft into a space. did.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an insertion rapier for a shuttleless loom, which is obtained by improving the insertion rapier for a shuttleless loom for high-strength fibers.

[0002]

[Prior Art]

 Generally, in a rapier loom, wefts are driven as follows. As shown in FIG. 5 (a), an insertion rapier 1 and a drawing rapier 30 are provided opposite to each other on both sides of the warp string 1 and are supplied from a cone 4 hung on a creel (not shown) on the outer right side. The weft yarn W 1 to be inserted is inserted across the warp yarn row V in the following procedure. That is, first, as shown in (b) of the figure, the weft W is held at the tip of the insertion rapier 1, and in this state the insertion rapier 1 advances toward the warp row V side (<< c >> in the figure). At this time, the pull-out rapier 30 also advances toward the warp row W side from the opposite side, and the weft W is transferred between the two at the substantially central portion of the warp row W. Then, as shown in FIG. 3D, the weft W gripped by the draw-out rapier 30 is pulled to the left outer side of the warp row V as the draw-out rapier 30 moves backward (<< e >> in the same figure), and finally. , Is cut by the cutter 6 arranged on the outer right side of the warp row V (<< f >> in the figure shows a state just before cutting). The weft insertion is performed in this way.

In general, the insertion rapier for a shuttleless loom has a U-shaped cross section in which the tip portion is continuous in the longitudinal direction, and the tip of the weft yarn is grasped and carried near the tip portion. A scissor-like spring-biased weft gripping portion for feeding, and a position where it is easy to enter the hook portion of the draw-out rapier 30 when the weft thread is transferred to the draw-out rapier at the center of the loom in cooperation with the weft gripping portion. A guide groove 3 for positioning the weft W is provided oppositely.

As shown in the plan view of FIG. 6 and the front view of FIG. 7, the weft grip portion 5 has a stopper to prevent the weft W gripped at the rear end thereof from coming off the grip portion 5. -20 is provided so as to project in a straight direction with respect to the grip surface. As a result, the weft yarns W delivered from the cone 4 are held as a bundle at the position of the stopper 20, and even when two or more weft yarns W are driven in, they are reliably delivered to the pull-out rapier 30 without being scattered. You can

[0005]

[Problems to be solved by the device]

 However, since the stopper 20 of the prior art described above is fixed, when the thick yarn or the weft of the high tension fiber is inserted and the weft W is not cut by the yarn feeding cutter 6, as shown in FIG. In addition, since the stopper 20 of the insertion rapier is fixed, it is passed to the drawer rapier 30 as it is, and the weft thread does not come off from the insertion rapier 1 due to the loop shape, and when the next thread insertion operation is started, as shown in FIG. The warp V on the left ear is cut off. Such an accident is due to the stopper provided on the grip 5 of the insertion rapier 1 being fixed.

The present invention has been made in view of the above-mentioned drawbacks of the conventional insertion rapier. When the weft insertion of the insertion rapier is performed and the weft is not cut from the yarn feeding cutter, the stopper is released. Therefore, it is an object of the present invention to provide an insertion rapier for a shuttleless loom, which eliminates a trouble caused when a weft thread is mistakenly cut.

[0007]

[Means for Solving the Problems]

 For the above-mentioned purpose, a weft guide groove is formed in the upper plate portion of the tip portion of the insertion rapier, and a scissor-shaped spring-biased weft grip portion having a predetermined width is provided in the lower plate portion. A weft thread that is hooked between the guide groove and the weft thread grip section is provided behind it so that it does not come off from the weft thread grip section, and when the weft thread reaches a certain tension or more, a stopper that retracts to a position that is disengaged from the weft thread grip section is installed. This is achieved by an insertion rapier for a shuttleless loom characterized by being provided.

[0008]

[Action]

 That is, according to the insertion rapier for a shuttleless loom of the present invention, the stopper for bundling and holding the wefts at a fixed position when gripping the wefts is a movable stopper that retracts when the wefts reach a certain tension or more. If the weft is not broken, the high tension of the weft causes the stopper to retract and the weft is disengaged from the weft grip portion. As a result, the yarn is not delivered to the draw-out rapier, but the weft yarn loosens at the same time as the insertion rapier retracts, so an abnormality is detected by the tension sensor provided on the road yarn that is fed from the cone, and warp cutting trouble occurs. You can stop the loom before.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. 1 and 2 show the insertion rapier of the first embodiment. This weft insertion rapier 1 has a U-shaped transverse surface continuous in the longitudinal direction at its tip, and its tip portion is sharpened. A weft guide groove 3 is formed at the tip of the upper plate portion 11 of the insertion rapier 1 so that the weft thread can be easily inserted, and the weft guide groove 3 is formed at a predetermined position of the lower plate portion 14 of the insertion rapier 1. A scissors-like spring-biased weft gripping portion 5 for gripping the tip and conveying the weft is provided.

The weft grip portion 5 is composed of scissor pieces 5a and 5b having a constant width, one scissor piece 5b is fixed, and the other scissor piece 5a is constantly stretched by a spring 13 stretched at its end. The gripping surface 60 is biased. A space 12 is provided at the rear end of the weft grip surface 60 so that the weft W separated from the weft grip portion 5 becomes free. Then, between the weft guide groove 3 formed in the upper plate portion 11 and the weft grip portion 5 provided in the lower plate portion 14, the weft W hung vertically is held so as not to be displaced backward. There is provided a movable stopper 15a having a shape of "he". The movable stopper 15a is made of a spring material, and is urged in a direction perpendicular to the weft gripping surface 6.

Therefore, when the tension of the weft yarn W is normal, the weft yarn W is urged by the movable stopper 15a, held at the position shown in FIG. 1, and the weft insertion is performed. However, if the weft W is not cut by the yarn feeding cutter, when the weft insertion rapier inserts the weft, the weft pulls forcibly and becomes a high tension, and the movable stopper 15a cannot support it and the substrate stops. The weft yarn W is pushed down to the 17 side and guided to the space 12 to be in a free state. As a result, the yarn is not delivered to the draw-out rapier, and when the insertion rapier retreats, the weft is loosened at the same time, and the tension guide 50 provided on the weft feeding path yarn detects this change in tension and stops the loom. It is possible to prevent troubles.

FIG. 3 is an external view showing the insertion rapier of the second embodiment, showing another aspect of the movable stopper, and the other portions are the same and the description thereof will be omitted. The movable stopper 15b is composed of a single coil-shaped spring, and is provided so that its tip portion cuts the weft grip portion 5 at a right angle. Therefore, when the tension of the weft thread W applied to the weft thread insertion rapier 1 rises, the movable stopper 15b bends, and when the tension exceeds a certain level, the weft thread W escapes into the space 12 to prevent the above-mentioned problems of the prior art. You can

FIG. 4 is an external view of the insertion rapier of the third embodiment, which is the same as the embodiment described above except for the movable stopper 15c, and the description thereof will be omitted. The movable stopper 15c is a so-called piston-type movable stopper that urges the weft path toward the weft from behind, and compresses the coil spring 19b and the coil spring 19b in accordance with the tension of the weft W. It is composed of a piston rod 19a provided with a topper plate for abutting the weft. This movable stopper 15c also acts as a holding stopper for the weft when the tension of the weft W is normal as in the case of the above-mentioned stopper, but when the weft is above a certain tension, the stopper function is released and this weft is released. It opens up to space.

[0015]

[Effect of the device]

 As described above in detail, the insertion rapier according to the present invention grips the weft at a predetermined position of the weft grip portion, and releases the stopper function when the stopper for holding the weft in a bundle exceeds a certain tension. Since it is a movable stopper that discharges the weft yarns to the rear space, it is possible to prevent the trouble of cutting the warp due to the cutting error of the yarn feeding cutter of the loom. In particular, when a thick high-strength fiber is used, a cutting mistake may occur due to wear of the yarn feeding cutter, which is effective in such a case.

[Brief description of drawings]

FIG. 1 is an external view of an insertion rapier showing a first embodiment of the present invention.

FIG. 2 is a front view of the insertion rapier of the first embodiment.

FIG. 3 is an external view of an insertion rapier showing a second embodiment of the present invention.

FIG. 4 is an external view of an insertion rapier showing a third embodiment of the present invention.

FIG. 5 is a weft insertion operation diagram of the rapier loom.

FIG. 6 is a plan view of a conventional insertion rapier.

FIG. 7 is a front view of a conventional insertion rapier.

FIG. 8 is a trouble state diagram of a conventional insertion rapier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weft insertion rapier 3 Guide groove 4 Cone 5 Weft gripping part 6 Weft cutter 11 Upper plate part 12 Space 14 Lower plate part 15a, 15b, 15c Movable stopper 20 Fixed stopper 30 Drawer rapier W Weft V Warp 60 Weft gripping surface

Claims (1)

[Scope of utility model registration request] 1. A weft guide groove is formed in an upper plate portion of a tip portion of an insertion rapier, and a scissor-shaped spring-biased weft grip portion having a predetermined width is provided in a lower plate portion, A weft thread, which is hooked between the guide groove and the weft grip section, is provided behind it so that it does not come off the weft grip section. An insertion rapier for a shuttleless loom characterized by being provided.