JPH0463Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a drive device for a weft insertion carrier in a narrow cloth loom.

(Prior Art) Generally, the reciprocating rocking motion of a weft insertion carrier in a narrow cloth loom is performed by a crank mechanism that is linked to the beating of the reed.

(Problem that the invention aims to solve) Even if an attempt is made to speed up the loom with this conventional crank mechanism linked to beating, the time chart of the crank mechanism is approximately a sine curve, so the stationary time at the turning point is Therefore, when the next weft is inserted, the tip of the carrier collides with the reed, resulting in a weft insertion error. Furthermore, when the speed of operation is increased, rattling occurs between the groove of the slider and the trochanter, which causes the carrier tip to vibrate, which limits the number of rotations, and no improvement in weaving efficiency can be expected.

The present invention provides a drive device for a weft insertion carrier for the purpose of improving weaving efficiency by increasing the speed of a loom.

(Means for solving the problems) The present invention solves the above problems, and includes:
The contents will be explained below using FIG. 1 corresponding to the embodiment.

A circular cam 2 is fixed to the rotating shaft 1, and at least four rotors 4 provided on the fan-shaped portion of the sector-shaped driven body 3 are engaged with the circular cam grooves, and a swing fulcrum 5 of the sector-shaped driven body 3 is connected to the circular cam 2. Install the base of carrier 5.

(Function) As shown in FIG. 1, the carrier 6 is reciprocated by the swinging movement of the fan-shaped follower 3 due to the rotation of the circular cam 2, and the weft Y threaded through the tip of the carrier is inserted into the opening of the warp thread W. After doing this, insert the weft Y
This is the beating of the reed.

(Example) FIG. 1 is a diagram showing an example of the present invention. 1st
In the figure, a rotating shaft 1 is supported so as to rotate in the direction of the arrow by an appropriate drive source (not shown). Reference numeral 2 denotes a circular cam fixed to the rotating shaft, 3 a fan-shaped follower, and this fan-shaped portion is provided with four rotors 4 that engage with grooves of the circular cam. Reference numeral 6 denotes a weft insertion carrier whose base is attached to a shaft 5 which is a swinging fulcrum to which the fan-shaped follower 2 is fixed.

The cam groove of the circular cam is connected to the carrier 6 in FIG.
As shown in curve A, which is a breakdown of the reciprocating motion of the circular cam, the barrel cam is formed with a cam curve having a timing such that the rotation angle of the circular cam stops at approximately 90 degrees (when the weft is inserted). In FIG. 2, curve B indicated by a two-dot chain line is based on a conventional crank mechanism.

The drive device of the present invention configured as described above is linked to the reciprocation of the fan-shaped follower 3 due to the rotation of the circular cam 1, and gives the carrier 6 a rocking motion as shown by the curve A in FIG. Weft yarn Y inserted into
is inserted between the opened warp threads W, and the woven fabric C is weaved in a well-known manner using a beating motion.

(Effects of the invention) As explained above, the present invention is configured to use the circular cam as a power source to give a reciprocating rocking motion to the weft insertion carrier. Since we were able to set a stop timing when the carrier was inserted, it was possible to eliminate the collision between the reed and the carrier during beating the reed, and also eliminate the vibration of the carrier caused by the distortion caused by the drive by the crank mechanism. This has the effect of not only increasing the speed but also allowing the carrier to smoothly swing back and forth.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the device of the present invention, and FIG. 2 is a curved diagram illustrating the movement of the carrier by the drive device of the present invention. 1...rotating shaft, 2...circular cam, 3...fan-shaped follower, 4...trochanter, 6...carrier.

Claims (1)

[Claims for Utility Model Registration] (1) Engaging with the groove of the circular cam 2 fixed to the rotating shaft 1;
At least four detached trochanters 4 are connected to the fan-shaped follower 3
A drive device for carriers in a narrow cloth loom, comprising a carrier 6 provided at regular intervals in a fan-shaped part of the fan-shaped driven body, and a base of a weft insertion carrier 6 attached to a swinging fulcrum of the fan-shaped driven body. (2) A carrier in a narrow cloth loom according to paragraph 1 of the utility model registration request, which uses a barrel cam as a circular cam having a cam curve in which the swinging of the carrier stops at approximately 90 degrees of rotation angle of the circular cam before beating. drive unit.