Topy Kogyo Kabushiki Kaisha

Nippon Valqua Industries, Ltd.

Seiji Oomura

Shingo Tsukui

Hidekazu Iwaki

Takashi Konno

Akira Muramatsu

Kenichi Takahashi

Masaki Ohara

Takuma Akazawa

Akiyoshi Kurihara

Hiromasa Muraki

Shunsuke Tanaka

Kouji Toriyama

Noriyuki Andou

A cable system A includes a cablefor connecting a base deviceand a travelling body, a reel devicemounted on the travelling body, a motor controllerfor controlling a motorof the reel device, and a rotary encoder(rotation sensor) for detecting rotation of a reel. The motor controllerbasically makes the motorfree, when the reelis rotating in an unreeling direction, and basically applies a rotational torque in a reeling direction to the reel, when the reelis rotating in the reeling direction. Furthermore, even if the reelis rotating in the unreeling direction, if an unreeling speed of the cableexceeds a travelling speed of the travelling body, the rotational torque in the reeling direction is applied to the reel. Slackening of the cableis thereby prevented.

Cable system

In the present invention, a crawler belt () is provided with: an endless belt main body (); a plurality of tread lugs () formed at the outer periphery of the belt main body () with spaces therebetween in the peripheral direction; and a pair of disengagement prevention sections () that are formed along the peripheral direction of the belt main body () at the inner periphery of the belt main body () and are separated in the width direction of the belt main body (). The disengagement prevention sections () are configured from a plurality of rib segments () extending in the peripheral direction and disposed along the peripheral direction with spaces therebetween. Each rib segment () is disposed at a position in the peripheral direction corresponding to a tread lug ().

Crawler device

A cable system has a cable connecting a base device and a travelling body, functions of the cable at least including transmission of signals, a reel device disposed on the travelling body, the reel device having a reel onto which the cable is to be wound, a motor that drives the reel and a rotation sensor that detects a rotation of the reel, a motor controller that controls the motor of the reel device; and an acceleration sensor that is disposed in the traveling body and detects an acceleration in a vertical direction, the motor controller basically opening a motor drive circuit for driving the motor or bringing a supply current to the motor to zero when it is determined that the reel is rotated in an unreeling direction for unreeling the cable based on sensed information from the rotation sensor.

Theme To provide a small-sized crawler device that can stably ride over bumps or steps or stairs. Means to Solve The crawler device includes a device body () having main crawlers () on its left and right and auxiliary crawlers () provided as auxiliary members at one end portion of the device body. Before the crawler device ascends a step or stairs with the auxiliary crawler () positioned backward, the controller () brings the auxiliary crawler () into a preparatory state in which the auxiliary crawler () is freely rotatable with respect to the main crawler () or the auxiliary crawler () is maintained in a position above a line extending longitudinally from the main crawler by a predetermined angle. After the main crawler () starts ascending the step or stairs and when a tilt angle of the device body () detected by a tilt sensor () reaches or exceeds a threshold angle, the controller () controls the auxiliary crawler () to be rotated downward to reduce the tilt angle of the device body (), thereby preventing the crawler device from toppling backward.

Crawler device and automatic attitude control of the same

A seal for an endless track has a cross section having a centerline parallel to an axis of the seal and a configuration symmetric with respect to the centerline of the cross section. The seal can include an elastically deformably configured portion having a cross section like alphabetical letter X, and a protrusion extending from an intersection of legs of letter X in a bushing-side direction further than a plane connecting bushing-side end portions of the legs of letter X. The protrusion has an end surface where the protrusion contacts the bushing. The seal can further include an embedding portion embedded in a space between legs of letter X, on a bushing-side of the intersection of the legs of letter X.

Growing community of inventors

Tokyo, Japan

Seiji Oomura