JPH0235827Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a receiving gripper for a shuttleless loom. As shown in Fig. 1, a receiving gripper of a conventional shuttleless loom has a gripper head 1 having a hook 1a whose tip end is opened toward the fabric front side, and a gripper head 1 that elastically engages the hook opening 1b of the head from the vertically lower part to collect the weft yarn. At the center of the warp opening, the yarn is engaged with a conveying gripper (not shown) that has drawn out and conveyed the yarn from the weft supply source on the opposite side, and the conveying gripper grips the yarn. The weft yarn Y that was holding the hook part 1a and the gripping member 2
It was designed to receive the material by gripping it with the machine and transport it to the end of the machine for weft insertion. In this case, the gripping state of the weft yarn by the hook portion 1a and the gripping member 2 is as shown in FIGS.
As shown in the figure, the weft is nipped between the inner bottom surface and inner wall of the hook 1a of the gripper head and the surface of the gripping member 2, and one end Ya of the weft Y is connected to the weft supply source, while the other end Yb is bent. It has become a free end from the state. However, depending on the type of cloth being woven, if the weft is a lame cloth thread such as gold thread or silver thread, monofilament, glass fiber, carbon fiber, etc., the thread itself has stiffness compared to cotton thread, etc., making it difficult to bend. If the stiffness is large, the weft yarn Yb on the free end side will try to restore its original state using the nipped point as a fulcrum as shown in Figure 3, and at this time the yarn will tend to come off from the nipped point, causing As a result, there was a drawback that it caused mistakes in receiving the weft threads.

Therefore, the present invention aims to solve the above-mentioned drawbacks, and its purpose is to provide a receiving gripper that can reliably grip the weft yarn even if the weft yarn has high bending rigidity. According to the present invention, a leaf spring whose tip end is a free end is fixed along the longitudinal direction of the lower surface of the gripping member, and the leaf spring is made to protrude somewhat from the lower surface of the gripping member toward the fabric front side, and at least The weft yarn Y is connected to a first nip point consisting of the inner bottom surface of the upper wall of the hook of the gripper head and the upper surface of the gripping member, and a second nip point consisting of the upper surface of the protruding portion of the leaf spring and the inner bottom surface of the side wall of the hook. The device is characterized in that it is configured to be gripped between two nip points.

Next, an example of a receiving gripper that implements the present invention will be explained in detail with reference to the drawings. In Fig. 1, a gripper head 1 whose tip is opened toward the fabric front side and a gripper head 1 that receives pressure from the vertically lower part of the hook opening 1b of the head are shown. The gripping member 2 that grips the weft by engaging with the weft is exactly the same as the conventional one, and for example,
Since it is publicly known from No. 40659, detailed explanation thereof will be omitted. A leaf spring 3 having a shape slightly projecting toward the front side of the fabric compared to the shape of the tip of the gripping member 2 is fixed to the lower surface of the gripping member 2, with the tip in the longitudinal direction thereof serving as a free end. Therefore, the leaf spring 3 is the sixth
As shown in the figure, since it is formed to protrude from the outer shape of the gripping member 2, the weft yarn Y is connected to the inner bottom surface 1a' of the gripper head 1 and the gripping member 2 as shown in FIG.
It is configured to be gripped between two points: a first nip point between the top surface and a second nip point between the top surface of the protruding portion of the leaf spring 3 and the inner bottom surface 1a of the side wall of the hook 1a. has been done.

Note that the means for fixing the leaf spring 3 to the gripping member 2 may be any of welding, brazing, adhesion, and screwing.
In the case of screwing, the strength of the leaf spring can be selected as appropriate depending on the type of weft.

An example of the receiving gripper implementing the present invention is constructed as described above. Next, its operation will be described. In FIG. It is nipped on the upper surface of the gripping member 2, then nipped on the inner surface 1a'' of the side wall of the hook 1a and the side surface of the gripping member 2, further nipped on the inner bottom surface 1a of the side wall of the hook and the upper surface of the protruding portion of the leaf spring 3, and then After separating from the rear gripper 1, the weft yarn Y becomes free.At this time, due to the elastic force of the leaf spring 3, the weft yarn Y touches the upper surface of the protruding part of the leaf spring 3 and the inner bottom surface 1a of the side wall of the hook 1a just before the yarn is separated. Even if the weft yarn Y is a stiff and highly rigid yarn, it will not come off the gripper 1.As described above, the present invention When the weft is received from the conveying gripper, a leaf spring having a shape larger than the shape of the tip of the gripping member is fixed to the lower surface of the gripping member on the fabric front side, and when the weft is separated from the gripper,
Since the weft thread is gripped again between the leaf spring and the underside of the hook of the gripper head, compared to the conventional method where the weft thread is simply gripped between the hook part of the head and the gripping member, it is possible to handle gold, silver thread, glass fiber, carbon fiber, etc. Even if the yarn has a high bending rigidity, receiving errors will not occur and the weft can be inserted reliably.

[Brief explanation of the drawing]

Figure 1 shows a conventional shuttleless loom receiving gripper.
FIG. 2 is an enlarged plan view of the main part of FIG. 1, FIG. 3 is a side view of FIG. 2, FIG. 4 is a sectional view taken along line AA of FIG. 1, and FIG. 6 is an enlarged side view of the main part of the receiving gripper of the present invention, FIG. 6 is a plan view of the main part of the gripping member of the receiving gripper of the present invention, and FIG.
It is a sectional view corresponding to A sectional view. 1...Gripper head, 1a...Hook, 1
a'... Inner bottom surface of the hook, 1a... Inner bottom surface of the side wall of the hook, 1b... Opening, 2... Gripping member, 3... Leaf spring.

Claims (1)

[Scope of utility model registration request] A shuttleless loom comprising a gripper head 1 having a hook 1a whose tip is opened toward the fabric front side, and a gripping member 2 that grips a weft yarn by engaging elastically with the hook opening 1b of the head from the bottom in the vertical direction. In the receiving gripper, a leaf spring 3 whose tip end is a free end is fixed along the longitudinal direction of the lower surface of the gripping member 2, and the leaf spring 3 is moved from the lower surface of the gripping member 2 to the front side. The first nip point, which is made up of the inner bottom surface 1a' of the upper wall of the hook 1a of the gripper head 1 and the upper surface of the gripping member 2, and the upper surface of the protruding portion of the leaf spring 3, A receiving gripper for a shuttleless loom, characterized in that it is configured to grip between two points, including a second nip point formed by an inner bottom surface 1a of a side wall of the hook 1a.