JPH0133658Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a fluff removal device for a weft gripper of a fragmentary loom.

A weft gripping device used in a piece loom generally includes a fixed disk and a movable disk attached to a reciprocating rod that passes through the fixed disk, and moves a pair of disks closer to each other or away from each other by reciprocating movement of the reciprocating rod. The discs are designed to grip or release the weft threads that are drawn between the discs, but if fly fluff accumulates between the discs, the fly fluff that has gathered up in a ball may adhere to the weft yarns, resulting in a decrease in the quality of the fabric. If you only press down on the fluff when gripping, you will not be able to reliably grip the weft.

(Prior art) For this reason, as shown in Japanese Patent Application Laid-Open No. 53-78364, an air passage is provided that opens around the reciprocating rod facing the space between the pair of disks, and air is pumped through the opening. Some are designed to remove fly fluff by squirting or suctioning.

However, such a fluff removal device requires equipment such as a blower or compressor to obtain air for fluff removal, which not only increases the cost of the device, but also increases the cost of the device. The problem was that running costs were also high.

(Purpose of the invention) The present invention was made in view of the shortcomings of the conventional devices, and is a fluff removal device that does not require an air generator such as a blower, that is, does not use air. The purpose is to provide

(Structure and operation of the device) For this reason, the present invention forms a side wall surface on the fixed disk constituting the weft gripper, starting from the center and gradually moving away from the center toward the rear side after the rotation of the movable disk. As the movable disk rotates, the fluff is moved along the side wall surface in the circumferential direction of the fixed disk and discharged from between the disks.

(Example) An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a weft gripper according to the present invention.

On the bracket 3 fixed to the frame 1 of the loom with bolts 2, there is a main body 4, a fixed disk 5 fixed on the main body 4, and a bolt that passes through the bracket 3, the main body 4 and the fixed disk 5, and is connected to the fixed disk 5. A weft gripper 8 consisting of a reciprocating rod 7 to which a movable disk 6 is rotatably attached
are fixed thereto, and yarn guide plates 10, 10 provided with yarn guides 9, 9 for passing the weft W through both disks 5, 6 are also fixed. Reference numeral 11 denotes a cam fixed to a fixed shaft 12 that rotates in synchronization with the rotation of the loom, and is configured to come into contact with a cam follower 15 provided at one end of a cam lever 14 that is pivotably mounted on a support shaft 13. It's summery. The cam lever 14 is biased by a spring (not shown) in a direction that brings the cam follower 15 and cam 11 into pressure contact. The other end of the cam lever 14 is in contact with the lower end of the reciprocating rod 7. When the cam 11 rotates in synchronization with the rotation of the loom, the reciprocating rod 7 reciprocates up and down, and the weft is gripped or released by the disks 5 and 6. The configuration up to this point is the same as that shown in Japanese Patent Publication No. 57-10214, in which the weft is weakly gripped during beating.

Next, the form of the fixed disk 5 according to the present invention will be explained in conjunction with FIGS. 2A and 2B.

The fixed disk 5 has a recess 5' formed on the side opposite to the weft passing side, and a hole 5d into which the reciprocating rod 7 is inserted. This recess 5' is composed of a bottom surface 5a and side wall surfaces 5b and 5c. Of these, the side wall surface 5b on the weft traveling direction (arrow A) side is located in the weft insertion direction A from the center of the fixed disk.
It extends almost straight to the other side wall surface 5c.
is formed from the central part toward the anti-weft insertion side, which is the rearward side of rotation of the movable disk 6, and its tangent line l is formed toward the center P of the disk 5, i.e., so that it gradually moves away from the center toward the rearward rotational side. , reciprocating rod 7
The curved surface is formed so as to intersect with a line K in the weft insertion direction passing through the center at a point Q on the weft insertion side from the center P. Incidentally, as shown by the dotted line in the figure, the extension line may be formed in a straight line that does not face the center,
A curved surface is preferred.

Next, the effect will be explained.

When the weft insertion is finished using the weft insertion nozzle, the weft W
is held between both disks 5 and 6. Then, when the wefting process is performed, the weft yarn W is carried by a reed from the position where the weft is inserted to the front of the fabric. That is, during weft insertion and beating, there is a difference in the weft path length between the weft gripper 8, more precisely, the yarn guide 9 on the right side in the figure, and the warp row (not shown) closest to the weft gripper.
In order to make up for the difference, the weft W is pulled out during beating. As a result, the movable disk 6 rotates in the direction of the arrow (clockwise), and the fly fluff generated on the weft passing side of the movable disk 5 is brought to the recess 5', and by the continued rotation of the movable disk 6. It moves along the side wall surface 5c without accumulating and is finally discharged outside between the two disks 5 and 6. In addition, since the movement of the reciprocating rod 7 moves the movable disk 6 up and down about 8 times per second (at 480 rpm), a small airflow is generated from the center of the disk toward the outside. The fluff will also be blown outside.
In this way, by these two actions, the fluff is removed and no fluff remains on the gripping surface of the weft yarn.

(Effects of the Invention) As described above, the present invention has an excellent effect of being able to provide a fluff removal device with low device cost and low running cost.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a weft gripper related to the present invention;
2A and 2B are a plan view and a side view of the fixed disk. 4... Main body, 5... Fixed disk, 6... Movable disk, 8... Weft gripper. 5'... recess,
5a...bottom surface, 5b, 5c...side wall surface, W...weft.

Claims (1)

[Scope of utility model registration request] A fixed disk 5 is fixed on the main body 4, and a movable disk 6 is attached to a reciprocating rod 7 that passes through the main body 4 and the fixed disk 5 and is rotatable with respect to the fixed disk. In a weft gripper of a fragmentary loom, which moves a pair of disks 5 and 6 closer to or apart from each other by reciprocating motion, and grips or releases a weft W passed between these disks,
A fluff removing device for a weft gripper, characterized in that a side wall surface 5c is formed on the fixed disk 5, starting from the center of the disk and gradually moving away from the center toward the rear side of rotation of the movable disk.