Ogura Clutch Company, Ltd.

Takashi Mitsuhashi

Yoshiyuki Matsumoto

Nobuyuki Shuto

Yoshihiro Kurosu

Haruhiko Ushirode

Takeharu Murakami

Sakae Takakusagi

Tatsuya Hotta

A spindle unit includes a swing mechanism fixed to a fixed frame, a support member swingably supported by the swing mechanism, a spindle main body and an electromagnetic brake supported by the support member. The spindle main body rotates integrally with a bobbin around which a yarn is wound. The electromagnetic brake applies a resistance to the rotating spindle main body. The swing mechanism includes a fixed attachment member fixed to the fixed frame, a swing shaft supported by the fixed attachment member, a spring, and a sensor. The spring applies a spring force to the support member in a direction opposite to a direction in which the support member swings by the tension of the yarn. The sensor detects the tilt amount of the support member when the support member swings.

Spindle unit

A spindle unit includes a support shaft, an electromagnetic air-gap brake, a spindle member, and a coupler. The support shaft is attached to the stationary frame of a creel. The brake is connected to the front end of the support shaft. The spindle member is rotatably supported by the support shaft in a state in which the support shaft and the brake are inserted in the spindle member. The coupler couples the spindle member and the brake shaft.

An electric fuel pump includes a pump unit, motor unit, fuel discharge unit, stator holder, magnet wire, connection terminal, first mold resin, driver board assembly, and second mold resin. The fuel discharge unit includes a discharge port member and discharges fuel supplied from the pump unit through the motor unit. The stator holder is provided to the motor unit and includes a partition which defines the motor unit and the fuel discharge unit. The partition includes a terminal insertion hole and a fuel passage. The connection terminal is connected to the magnet wire. The driver board assembly is stored in a space formed in the discharge port member and electrically connected to the connection terminal. The second mold resin molds the driver board assembly and a connecting portion where the driver board assembly is connected to the connection terminal.

Electric fuel pump

A tension apparatus having a mechanical section, storage unit, output torque calculation section, and exciting current calculation section is disclosed. The mechanical section has an electromagnetic brake driven by an exciting current to generate an output torque and applies a tension to a material in continuous form, which is being wound and stretched, in accordance with the output torque of the electromagnetic brake. The storage unit stores actually measured characteristics between an exciting current value and the output torque of the electromagnetic brake in advance. The output torque calculation section obtains the output torque of the electromagnetic brake in correspondence with an input tension instruction value. The exciting current calculation section obtains an exciting current value of an exciting coil, which is necessary to generate the output torque of the electromagnetic brake, by looking up the storage unit.

Tension apparatus and tension system

A tension apparatus includes a mechanical section, signal output section, smoothing circuit, maximum value holding circuit, constant current driving circuit, and discharge circuit. The mechanical section has an electromagnetic brake driven by an exciting current to generate an output torque and applies a tension to a material in continuous form which is being wounded and stretched by the output torque of the electromagnetic brake. The signal output section repeatedly outputs a PWM (Pulse Width Modulation) signal having a duty ratio corresponding to an input tension instruction value before and after a predetermined stop period. The smoothing circuit smoothes the PWM signal from the signal output section. The maximum value holding circuit holds a maximum voltage value of the smoothed PWM signal. The constant current driving circuit supplies an exciting current corresponding to the held maximum voltage value to the electromagnetic brake. The discharge circuit resets holding operation of the maximum value holding circuit on the basis of a magnitude comparison result between a current tension instruction value and a previous tension instruction value.

Tension apparatus

A magnetic coupling includes a cylindrical housing, a spindle, an adjusting plate, two pairs of permanent magnet discs, two hysteresis material discs, and a screw member. The spindle is rotatably supported at its axial position by the housing. The adjusting plate is rotatably supported by the spindle to partition an interior of the housing into two sections in a direction of the spindle. The two pairs of permanent magnets are provided in the two corresponding sections to respectively oppose each other. One of each pair of permanent magnet discs is fixed in the housing and the other thereof is fixed to the adjusting plate. Each permanent magnet disc has magnetic poles with polarities that alternate in a circumferential direction. The hysteresis material discs are fixed to the spindle and arranged between the corresponding pairs of permanent magnet discs at a predetermined gap. The screw member fixes the adjusting plate to the housing. When the adjusting plate which is released is pivoted, the mutual positional relationships between the respective opposing magnetic poles of the two pairs of permanent magnet discs are adjusted simultaneously.

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Gunma, Japan

Takashi Mitsuhashi