JPS584847A - Pulling gripper for shuttleless 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 relates to a tension gripper for a shuttle-less machine configured to prevent or minimize the possibility that the gripper itself will fail to convey at the center of the shed. It is.

It is known that the movement of the weft from the transport gripper to the tension gripper at the center of the shed is extremely delicate and difficult in all shuttleless m4Ii. The reason for this is that, especially at the currently used high weaving speeds, the precise positioning of the grippers relative to each other at the moment when the thread exchange occurs is insufficient. The various guidance systems that have been studied and adopted in the past, on the one hand, do not give conclusive results, and on the other hand, the said guidance systems are shuttle-centric and quite bulky.
This will cause various inconveniences in the operation of the loom.

The present invention, by virtue of its clever geometry - resulting from careful consideration of the mechanism of thread exchange in the shed center - provides a very satisfactory solution to the above-mentioned melting point.

The gripper of the invention of the type comprising a locking member with a claw end and five movable oscillating elements whose ends cooperate with the paddles for holding the thread is characterized in that the gripper at the end of the catcher member is It is characterized by being placed in a vertical plane and opening downwards.

The invention will now be described in more detail with reference to figures showing preferred embodiments of the 51 tension gripper of the invention.

The illustrated tensile gripper according to the invention has a fixed member l with a hook end 2 and a movable element 8 swinging at a point 4 on this member l.
This movable element is configured to cooperate in a known manner with the interior of the hook end 2 in order to hold the weft thread.

According to the invention, the illustrated gripper hooks 6 are arranged in a vertical plane and open downwards, ie towards the sliding plane of the strip controlling the movement of the gripper 9 and the ripper. This point is clearly illustrated in the figures, especially in FIG.

This configuration of the hook 6 is combined in the gripper of the invention with a unique structure for protecting the warp threads. This structure consists of a simple vertical fin 6 projecting from the member 1 carrying the key 5, which fin is placed on the side of the key 6.

The downwardly open raking arrangement adopted according to the invention eliminates most of the inconveniences occurring at the moment of weft exchange between the conveying gripper and the tension gripper on its side. ejd)
This is caused by the fact that the rotation of the conveying gripper about the longitudinal axis such as lifting it close to . Said rotation causes a lifting of the weft thread section which has to be gripped by the tension gripper. The lock, which opens above the conventional gripper below the weft thread for grasping the weft thread, is just in such a state that if it were lifted, it would not be able to move said thread which would try to escape from the key. On the other hand, the downward opening of the present invention is -1.
With this arrangement, gripping of the weft threads is constant and immediate. This is because the weft thread is gripped when the hook is on the weft thread, so that any lifting of the thread does not cause the thread to escape.

Furthermore, the warp protection vertical fins 6 very effectively prevent the warp threads from entering the hook and at the same time reduce the overall vertical dimension of the burr.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made to the present invention without departing from the scope of the invention.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire gripper of the present invention; Fig. 2 is a perspective view of the entire gripper of the present invention;
Detailed side view of the barbed end of the gripper shown in Figure 5. Figure 8 is a side view of the end piece of the gripper. l... Fixed member 2... Hook end 8... Movable element 5... Key 6... Fin. Patent Applicant Bamatex Socheta Bel Acioni Procedural Amendment August 6, 1981 1. Description of the Case 1980 Patent Application No. 80829 2. Name of the Invention Case of Person Who Amends Tensile Gripper for Shuttle-less Loom Machines Relationship with Patent applicant name: Bamatex Socheta per Acioni 3
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Claims (1)

[Claims]L: A single tension gripper for a shuttleless loom of the type comprising a fixed member having a hook end and a movable rocking element having an end cooperating with the hook for retaining the thread, A tension gripper characterized in that the hooks at the ends of the fixing member are arranged in a vertical plane and open downwards. Turtle Claims ll! 1. The tension gripper according to item 1, further comprising a vertical fin protruding from the holding member and disposed beside the hook for holding the warp threads.