JPH0527070U - Rapier head - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to prevent the phenomenon of swelling and rising in front of a rapier band without using a weight or the like. [Structure] The center of gravity of the weft carrier and the portion integrated with the weft in the vertical direction is positioned within the thickness range of the rapier band, and the acting force of the center of gravity is directly received by the portion of the rapier band.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rapier head of a rapier loom, and more particularly to a mounting structure for a weft carrier and a rapier band.

[0002]

[Prior Art]

 In a rapier weaving machine, a drive wheel is reciprocally rotated to give a reciprocating motion to a rapier band wound around the drive wheel, and a rapier head attached to the tip of the rapier band is run in the warp shed to carry out weft insertion. I'm doing it. When the rapier head accelerates or decelerates, the inertial force of the rapier head causes a rotational moment around the point of inertia of the rapier head, that is, the center of gravity of the rapier head, causing the rapier band to bend and the rapier head to bend forward or lift up. Or. Therefore, weft insertion cannot be performed stably.

The invention of Japanese Patent Laid-Open No. 58-208438 has been solved by attaching a weight to an appropriate position of a rapier band in order to prevent the above-mentioned phenomenon of leaning and rising. However, when such a correction weight is attached to the rapier band, the weight and inertia become large, and a large force is required to drive the rapier band, which hinders the speeding up of the weft inserting motion.

[0004]

[The purpose of the device]

 Therefore, it is an object of the present invention to prevent the curling phenomenon and the lifting phenomenon in front of a rapier band without using a weight or the like.

[0005]

[Means for solving the problem]

 Generally, the rapier band travels on the upper surface of the rapier guide together with the weft transport body as the rapier head body. For this reason, the mounting position of the rapier band is on the bottom side of the weft carrier, and it is almost impossible to change it due to restrictions such as the warp shed space.

Under these circumstances, the applicant for utility model registration constructed the rapier guide as a Y-shaped guide, and guided the both end edges of the rapier band by a pair of opposing grooves of the rapier guide. Have been put into practical use. According to such a guide type rapier guide, the rapier band does not necessarily need to be attached to the bottom surface of the weft transport body, and can be attached to the intermediate portion in the vertical direction.

The present invention pays attention to this point, and positions the center of gravity of the weft carrier and its integral portion in the vertical direction within the thickness range of the rapier band so that the acting force of the center of gravity is directly applied to the portion of the rapier band. I will try to accept it.

[0008]

【Example】

 1 and 2 show the rapier head 1 on the delivery side. The rapier head 1 is assembled by a weft carrier 2 and a thread presser 3, and these are attached to the tip portion of a rapier band 4. The weft transport body 2 has a dent 5 at the leading end and a gripping groove 6 on the upper surface side facing the dent 5, and a horizontal mounting hole 7 and a mounting hole 7 at the approximately middle portion in the thickness direction of the rear end. The mounting groove 8 is formed.

The rapier band 4 is inserted into the mounting groove 8 and fixed to the weft transport body 2 by a fixing screw 9. Further, the band tip 10 is similarly fixed inside the attachment hole 7 by a fixing screw 9 or the like, has the same width as the rapier band 4, and is connected in a butted state while forming a smooth joint surface.

The thread presser 3 is rotatably supported by the vertical thread pin 11 with respect to the weft carrier 2, with its tip facing the lower part of the grip groove 6 and at the rear end. The holding surface of the tip is pressed against the wall surface of the recess 5 by the spring 12.

Here, the center of gravity 13 in the up-down direction of the weft transport body 2 and the portion integrated with the weft transport body 2 is set within the thickness space of the lepia band 4 or within the thickness of its extension space. Since the position of the center of gravity 13 is preferably in the middle of the thickness of the weft carrier 2, the overall shape design of the weft carrier 2 is designed with the desired position as the target. In this design, a weight-reducing recess 14 is formed on the lower surface side of the intermediate portion of the weft transport body 2, and a storage space is formed in the rear end portion of the weft transport body 2 facing the lower surface side of the rapier band 4. 15 is formed. The storage space 15 is used as a space for storing the adjustment weight 16 when the center of gravity 13 is adjusted in the thickness direction of the rapier band 4 after manufacturing.

On the other hand, FIGS. 3 and 4 show the receiving side rapier head 1. The receiving side rapier head 1 has almost the same structure as the receiving side rapier head 1, but has a hook 17 at a portion corresponding to the recess 5, and the tip portion of the thread presser 3 is inside the hook 17. It is different in that it is facing.

Next, FIG. 5 shows a state in which the rapier head 1 is positioned inside the Y-shaped rapier guide 20, and both side edges of the rapier band 4 are fitted inside the pair of guide grooves 21. The rapier guide 20 is composed of a pair of dogleg shaped rapier guides having guide grooves 21. These doglegged rapier guides are alternately mounted so that the guide grooves 21 face each other and are separated by a predetermined distance in the weft inserting direction, and are arranged in a staggered manner. In the case of this guide system, since the rapier band 4 is guided to the guide groove 21 at both side edge portions, the weft transport body 2 has a structure that does not directly contact the guide portion even on the lower surface side. The rapier guide 20 is fixed to the sleeve 19 together with the reed 18. At the time of weft insertion, the weft yarn 22 enters the inside of the grip groove 6 and is gripped between the wall surface of the weft transport body 2 and the yarn presser 3.

FIG. 6 shows the principle of operation. When the weft carrier 2 is driven by the rapier band 4 to reciprocate, the driving force of the rapier band 4 directly acts on the center of gravity 13 even if it is accelerated or decelerated during the reciprocating linear motion of the rapier band 4. Since there is no moment in the front direction of curving or in the direction of lifting shown by the dotted line around the rapier head 1, the rapier head 1 does not cause the front curling phenomenon or the phenomenon of lifting even during acceleration / deceleration and conveys the weft in a predetermined posture. To do. Therefore, the weft insertion is performed in a very stable state, and the delivery / reception operation between the delivery-side rapier head 1 and the delivery-side rapier head 1 is also reliably performed.

Since the band tip 10 is in a position where it is easily worn, it is configured as a separate body from the rapier band 4, and is replaced with a new one when worn. This partial replacement eliminates the need to replace the rapier band 4.

[0016]

[Other Examples]

 In the above embodiment, the weft carrier 2 is composed of one member, but the weft carrier 2 is composed of separate members for the upper surface side of the rapier band 4 and the lower surface side of the rapier band 4. You can also In this case, the rapier band 4 is attached to the bottom side of the upper weft transport body 2, and another weft transport body 2 is attached to the bottom side of the rapier band 4. Then, the upper and lower weft transport bodies 2 are integrated vertically by using a fixing screw 9 or the like for attaching the rapier band 4. Also in this case, the vertical center of gravity of the integrated weft carrier 2 and the integrated part thereof is set within the thickness range of the rapier band 4.

When the weft transport body 2 is constructed by combining two members as in this embodiment, the position of the center of gravity of the weft transport body 2 above the rapier band 4 in the weft insertion direction and the position below it. It is better to match the position of the center of gravity of the weft transport body 2 in the weft insertion direction as much as possible. This is because if the two centers of gravity are separated from each other, a force that bends the lepia band 4 acts between them.

[0018]

[Effect of the device]

 According to the present invention, when the rapier band is accelerated or decelerated during the weft inserting motion, the rapier head does not generate a moment in the forward leaning direction or the uplifting direction. Can be done.

[Brief description of drawings]

FIG. 1 is a plan view of a rapier head on a delivery side.

FIG. 2 is a vertical sectional view at a center position of a delivery-side rapier head.

FIG. 3 is a plan view of a receiving rapier head.

FIG. 4 is a vertical cross-sectional view at the center position of the receiving rapier head.

FIG. 5 is an explanatory diagram showing a state in which a rapier head is attached to a rapier guide portion.

FIG. 6 is a side view for explaining the operation principle.

[Explanation of symbols]

 1 rapier head 2 weft carrier 3 thread retainer 4 rapier band 13 center of gravity

Claims (2)

[Scope of utility model registration request] 1. A rapier loom for weft insertion by running a flexible rapier band having a weft carrier attached at its tip into the warp shed, wherein a vertical center of gravity of a portion integral with the weft carrier is defined. A rapier head characterized by being positioned within the thickness range of the rapier band. 2. A rapier loom for weft insertion by running a flexible rapier band having a weft carrier attached at its tip into the warp shed, wherein a vertical center of gravity of the portion integral with the weft carrier is defined. A rapier head characterized in that a horizontal mounting groove is formed in the weft transporting body, and a rapier band is fixed in the mounting groove.