Ogura Clutch Company, Ltd.

Takashi Ishimaru

Toshio Takahashi

Yasuo Yokoyama

Toshiaki Akashi

A tension device for winding yarn includes a bracket with an inclined face and a braking member accommodated in the bracket. A rotary shaft protrudes from the center of the bracket. A tubular member has a through-hole for the rotary shaft. A forward guide member includes two hub members mounted on the axial end of the rotary shaft with a yarn winding portion joining the hub members.

Magnetic noncontacting tension device for winding yarn

The armature assembly (9 or 17) includes a hub (10 or 19) adapted to be connected to and rotate with an input shaft (8 or 18). The hub (10 or 19) includes a flange (10a or 19a) connected to a composite material armature support plate (12 or 21). Rubber dampers (15 or 23) are molded to rivets (14 or 24) and are pressed into cylindrical peripheral walls (12a or 21b) of damper holder sections (13 or 22). The rivets (14 or 24) are staked to an armature (16 or 25). The rubber dampers (15 or 23) bias the armature (16 or 25) into contact with surface of a stopper (10e or 21g) when an electromagnetic clutch (1) is not energized and a space (G or G.sub.2) is formed that extends axially from the armature (16 or 25) to the armature support plate (12 or 21) and radially outward from the stopper (10e or 21g).

Armature assembly in an electromagnetic coupling device

In an electromagnetic coupling apparatus, an excitation coil constituted by a plurality of turns of a winding member is covered with a resin coil bobbin. The coil bobbin can be divided into at least two members and is formed into a hollow annular shape. The divided mating surfaces of the members constituting the coil bobbin are joined to each other by ultrasonic welding.

Electromagnetic coupling apparatus

A terminal connection structure of an electromagnetic coupling device includes terminal housing unit, an extraction hole, a flat contact portion, a conductive mount member, and a conductive support member connected to a power source lead line. The terminal housing unit is formed integrally with a resin coil bobbin having an electromagnetic coil therein, and projects from a through hole formed in a yoke having an annular groove in which the resin coil bobbin is press-fitted. The extraction hole is formed in the terminal housing unit to extract one end of a winding of the electrogmagnetic coil. The flat contact portion is formed between a pair of grooves formed on two sides thereof in the terminal housing unit, and one end of the winding extracted from the extraction hole is brought into contact with the flat contact portion. The conductive mount member is press-fitted in one groove of the terminal housing unit to hold a portion of the winding brought into contact with the flat contact portion. The conductive support member is press-fitted in the other groove of the terminal housing unit to hold another portion of the winding brought into contact with the flat contact portion, and abuts against the mount member to hold press-fit states of the both.

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Kiryu, Japan

Takashi Ishimaru