To efficiently suppressing pressure pulsation of high-pressure water, which is ejected from a weft inserting pump using a coil spring, in a water-jet loom.
A coil spring 22, a movable spring receptacle 23 and plural disc springs 24 are put between a spring receiver 192 of a spring sheet 19 and spring receiver 202 of a spring cap 20. The spring constant of an assistant spring 25 formed of a plurality of disc springs 24 is larger than that of the coil spring 22. The movable spring receptacle 23 has a ring plate-shaped movable spring receiver 231 and a cylindrical part 33 monolithically formed on the periphery of the movable spring receiver 231. The cylindrical part 33 as a cylindrical member is slidably inserted into a cylinder of a cylindrical part 201 of the spring cap 20. A groove 34 is formed in the inner peripheral surface 203 of the cylindrical part 201 to travel around and a viscus fluid Q is filled in the groove 34.
YOSHIDA KAZUNORI
SUZUKI FUJIO
TOYOTA CENTRAL RES & DEV
Makoto Onda