Abstract: A cable system A includes a cable 3 for connecting a base device 1 and a travelling body 2, a reel device 10 mounted on the travelling body 2, a motor controller 40 for controlling a motor 15 of the reel device 10, and a rotary encoder 16 (rotation sensor) for detecting rotation of a reel 12. The motor controller 40 basically makes the motor 15 free, when the reel 12 is rotating in an unreeling direction, and basically applies a rotational torque in a reeling direction to the reel 12, when the reel 12 is rotating in the reeling direction. Furthermore, even if the reel 12 is rotating in the unreeling direction, if an unreeling speed of the cable 3 exceeds a travelling speed of the travelling body 2, the rotational torque in the reeling direction is applied to the reel 12. Slackening of the cable 3 is thereby prevented.

Abstract: In the present invention, a crawler belt (10) is provided with: an endless belt main body (11); a plurality of tread lugs (12) formed at the outer periphery of the belt main body (11) with spaces therebetween in the peripheral direction; and a pair of disengagement prevention sections (13) that are formed along the peripheral direction of the belt main body (11) at the inner periphery of the belt main body (11) and are separated in the width direction of the belt main body (11). The disengagement prevention sections (13) are configured from a plurality of rib segments (13a) extending in the peripheral direction and disposed along the peripheral direction with spaces therebetween. Each rib segment (13a) is disposed at a position in the peripheral direction corresponding to a tread lug (12).

Abstract: In the present invention, a crawler belt (10) is provided with: an endless belt main body (11); a plurality of tread lugs (12) formed at the outer periphery of the belt main body (11) with spaces therebetween in the peripheral direction; and a pair of disengagement prevention sections (13) that are formed along the peripheral direction of the belt main body (11) at the inner periphery of the belt main body (11) and are separated in the width direction of the belt main body (11). The disengagement prevention sections (13) are configured from a plurality of rib segments (13a) extending in the peripheral direction and disposed along the peripheral direction with spaces therebetween. Each rib segment (13a) is disposed at a position in the peripheral direction corresponding to a tread lug (12).

Abstract: 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.

Abstract: A cable system A includes a cable 3 for connecting a base device 1 and a travelling body 2, a reel device 10 mounted on the travelling body 2, a motor controller 40 for controlling a motor 15 of the reel device 10, and a rotary encoder 16 (rotation sensor) for detecting rotation of a reel 12. The motor controller 40 basically makes the motor 15 free, when the reel 12 is rotating in an unreeling direction, and basically applies a rotational torque in a reeling direction to the reel 12, when the reel 12 is rotating in the reeling direction. Furthermore, even if the reel 12 is rotating in the unreeling direction, if an unreeling speed of the cable 3 exceeds a travelling speed of the travelling body 2, the rotational torque in the reeling direction is applied to the reel 12. Slackening of the cable 3 is thereby prevented.

Abstract: 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.

Abstract: 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 (1) having main crawlers (20) on its left and right and auxiliary crawlers (30) 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 (30) positioned backward, the controller (65) brings the auxiliary crawler (30) into a preparatory state in which the auxiliary crawler (30) is freely rotatable with respect to the main crawler (20) or the auxiliary crawler (30) is maintained in a position above a line extending longitudinally from the main crawler by a predetermined angle.

Abstract: 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 (1) having main crawlers (20) on its left and right and auxiliary crawlers (30) 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 (30) positioned backward, the controller (65) brings the auxiliary crawler (30) into a preparatory state in which the auxiliary crawler (30) is freely rotatable with respect to the main crawler (20) or the auxiliary crawler (30) is maintained in a position above a line extending longitudinally from the main crawler by a predetermined angle.

Abstract: 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.

Abstract: 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.

Abstract: A cooling fan for an internal combustion engine hydraulically driven by a flow of propellant hydraulic fluid is controlled of its rotational speed by a system which includes a device for sensing a value representing the operating temperature of the engine, a device for sensing the operating temperature of the propellant hydraulic fluid, and a device for controlling the flow of the propellant hydraulic fluid, so as to increase the flow rate of the propellant hydraulic fluid when the operating temperature of the engine increases and also when the operating temperature of the propellant hydraulic fluid increases.

Abstract: In an automotive vehicle wherein the cooling fan for the internal combustion engine is driven hydraulically by a flow of a first propellant hydraulic fluid, while the power steering device for the steering system is driven hydraulically by a flow of a second propellant hydraulic fluid, reservoirs for storing the first and second propellant hydraulic fluids are provided as first and second tank portions, respectively, of a common reservoir tank, so that the first propellant hydraulic fluid which is more apt to be heated up by friction loss is cooled down by the second propellant hydraulic fluid which remains at ambient temperature as effectively cooled through the power steering fluid circulation system.