Abstract: The present invention relates to an improvement in caster swivel restriction structure. The present invention is characterized in that a swivel brake plate has a body piece having a plurality of through holes arranged therein and latch pieces bent downward from the body piece, a support base has latch hole portions for fitting the latch pieces in a vertical slidable manner, a gap portion provided at a location corresponding to below the group of through holes formed in the swivel brake plate, and cushioning members or biasing members which are disposed in the gap portion and supports the swivel brake plate aloft and which is repulsively compressed when downward force is applied to the swivel brake plate.

Abstract: The present invention relates to a novel trolley coupling structure that allows coupling of base parts of trolleys aligned in the vertical or horizontal direction. The present invention provides a trolley coupling structure in which a first receiving recess part is provided in a base part of one trolley, a second receiving recess part is provided in a base part of another trolley, a locking member is pivotally attached to the first receiving recess part, a recess part body and a bent section are formed in the respective first and second receiving recess parts, and retaining of the locking member is achieved by constraining and locking a constraining piece part of the locking member at the bent section.

Abstract: The present invention relates to an improvement in caster swivel restriction structure. The present invention is characterized in that a swivel brake plate has a body piece having a plurality of through holes arranged therein and latch pieces bent downward from the body piece, a support base has latch hole portions for fitting the latch pieces in a vertical slidable manner, a gap portion provided at a location corresponding to below the group of through holes formed in the swivel brake plate, and cushioning members or biasing members which are disposed in the gap portion and supports the swivel brake plate aloft and which is repulsively compressed when downward force is applied to the swivel brake plate.

Abstract: The present invention relates to a novel trolley coupling structure that allows coupling of base parts of trolleys aligned in the vertical or horizontal direction. The present invention provides a trolley coupling structure in which a first receiving recess part is provided in a base part of one trolley, a second receiving recess part is provided in a base part of another trolley, a locking member is pivotally attached to the first receiving recess part, a recess part body and a bent section are formed in the respective first and second receiving recess parts, and retaining of the locking member is achieved by constraining and locking a constraining piece part of the locking member at the bent section.

Abstract: [Problem] Related to a caster structure in which a sign groove for indicating a tire replacement timing of a caster including a wheel braked by a brake shoe is provided. [Solution] A caster structure in which a mark groove is provided in a tire of a wheel of a caster in which rotation of the wheel is braked by pressing a brake shoe onto the tire, characterized in that the mark groove in which a groove bottom portion is set to a predetermined depth is provided in an outer peripheral surface of the tire annularly along an outer periphery of the tire, and projecting portions for alarm each having an upper surface connecting right and left side walls forming the groove and closing the groove are provided in plural at predetermined intervals along an extending direction of the mark groove at a middle position of the depth between the groove bottom portion and a groove opening portion in the mark groove.

Abstract: A caster mounting portion has a mounting member housing portion which houses the mounting member, the mounting member has a rotary shaft portion which is pivotally supported in a bearing recessed portion in the mounting member housing portion, an abutment body in which the rotary shaft portion is provided at an eccentric position and which is displaced by rotation to be widened to close the inside of the mounting member housing portion, an upper locking piece which engages with a locking receiving portion of an opposed wall, a lower locking piece which abuts against the bottom face of a latching portion, and a locking stepped portion which is urged by a leading end of an elastic arm, climbing over the aforementioned latching portion, and engages with the latching portion.

Abstract: An electrical brake mechanism for a caster can reliably brake a caster. A switch is mounted on a target to which a caster is attached and outputting an instruction signal to a brake device, a detector is provided on a rotating shaft of the cam and arranged in correspondence with each of positions of a plurality of cam surfaces, a sensor is provided for detecting abutment between each of the cam surfaces and an operation shaft by the detector, a motor is provided for rotating by an input of the switch and for stopping if the sensor detects the position of the predetermined cam surface, and a gear train is provided for transmitting rotation of the motor to the rotating shaft of the cam.

Abstract: An operating shaft rises and falls by abutting against a cam surface of a cam rotatably built into the upper part of a stem. A swivel-preventing plate part is fixed to the lower end of the operating shaft. An engagement member is fixed to a support yoke and regulates the swiveling by engaging with the swivel-preventing plate part. A brake shoe part is fixed to the lower part of the swivel-preventing plate part and brakes by abutting against a treat surface of a wheel when the operating shaft falls. A link cam causes a link cam to pivot and causes a brake plate to rise and fall by connected to the brake shoe part. A protruding part for braking, by displacement of the brake plate, is capable of engaging with and disengaging from an annular engagement receiving part formed in the inner periphery of the wheel.

Abstract: A caster mounting portion has a mounting member housing portion which houses the mounting member, the mounting member has a rotary shaft portion which is pivotally supported in a bearing recessed portion in the mounting member housing portion, an abutment body in which the rotary shaft portion is provided at an eccentric position and which is displaced by rotation to be widened to close the inside of the mounting member housing portion, an upper locking piece which engages with a locking receiving portion of an opposed wall, a lower locking piece which abuts against the bottom face of the aforementioned latching portion, and a locking stepped portion which is urged by a leading end of an elastic arm, climbing over the aforementioned latching portion, and engages with the lathing portion.

Abstract: Art operating shall rises and fails by abutting against a cam surface of a cam rotatably built into the upper part of a stem. A swivel-preventing plate part is fixed to the lower end of the operating shaft. An engagement member is fixed to a support yoke and regulates the swiveling by engaging with the swivel-preventing plate part. A brake shoe part is fixed to the lower part of the swivel-preventing plate pail and brakes by abutting against a treat surface of a wheel when the operating shaft falls. A link cam causes a link cam to pivot and causes a brake plate to rise and fall by connected to the brake shoe part. A protruding part for braking, by displacement of the brake plate, is capable of engaging with and disengaging from an annular engagement receiving part formed in the inner periphery of the wheel.

Abstract: An electrical brake mechanism for a caster can reliably brake a caster. A switch is mounted on a target to which a caster is attached and outputting an instruction signal to a brake device, a detector is provided on a rotating shaft of the cam and arranged in correspondence with each of positions of a plurality of cam surfaces, a sensor is provided for detecting abutment between each of the cam surfaces and an operation shaft by the detector, a motor is provided for rotating by an input of the switch and for stopping if the sensor detects the position of the predetermined cam surface, and a gear train is provided for transmitting rotation of the motor to the rotating shaft of the cam.

Abstract: A push handle comprises a pair of column support portions provided on left and right sides and extendable/contractible in a vertical direction, a holding rod portion integrally interposed between upper ends of the pair of column support portions and extends toward left and right outer sides of the column support portions, and column support lock locking an extended posture of the column support portion. A entire length of the column support portion when contracted is set to be shorter than one of longitudinal and lateral lengths of the loading platform surface, an entire length of the holding rod portion is set to be shorter than the other of the longitudinal and lateral lengths of the loading platform surface to allow fitting in an accommodating groove portion when the push handle is folded.

Abstract: A push handle comprises a pair of column support portions provided on left and right sides and extendable/contractible in a vertical direction, a holding rod portion integrally interposed between upper ends of the pair of column support portions and extends toward left and right outer sides of the column support portions, and column support lock locking an extended posture of the column support portion. A entire length of the column support portion when contracted is set to be shorter than one of longitudinal and lateral lengths of the loading platform surface, an entire length of the holding rod portion is set to be shorter than the other of the longitudinal and lateral lengths of the loading platform surface to allow fitting in an accommodating groove portion when the push handle is folded.