Legged furniture, and leg adjuster and leg adjuster set for use in same
AssigneeShikumi Co., Ltd.
InventorToshiyuki Kato
Life of this patent
Estimating the term…
Abstract
In legged furniture having four or more legs and a load-receiving stage supported directly or indirectly by these legs, this legged furniture includes three main legs defining a triangular shape in a plurality of the legs and, assuming that the legged furniture is placed by using only the main legs, enabling a stable stationary attitude of the load-receiving stage, and a leg adjuster forming an extension portion of a sub leg other than the main legs and capable of expansion/contraction in a vertical direction and providing an expansion/contraction leg in cooperation with the sub leg and autonomously allows expansion or contraction of the expansion/contraction leg on the basis of a length of the main leg in accordance with the stationary attitude of the load-receiving stage.
Claims10
Legged furniture having four or more legs and a load-receiving plate supported directly or indirectly by said legs, comprising:
- three main legs among the legs defining a triangular shape, the three main legs enabling a stable stationary attitude of the load-receiving plate assuming that the legged furniture is placed by using only the main legs;
- and
- a leg adjuster forming an extension portion of a sub leg other than the main legs and capable of expansion and contraction in a vertical direction and providing an expansion and contraction leg in cooperation with the sub leg and autonomously allowing expansion or contraction of the expansion and contraction leg on the basis of a length of the main leg in accordance with the stationary attitude of the load-receiving plate, wherein
- the leg adjuster includes:
- an adjuster body attached to a lower end of the sub leg and capable of vertical expansion and contraction;
- urging means for urging the adjuster body in an expanding direction;
- and
- regulating means for regulating an expansion speed of the adjuster body having received an urging force of the urging means and a contraction speed of the adjuster body against the urging force;
- the adjuster body in the form of a hydraulic cylinder, comprising an outer cylinder being a leg end of the expansion and contraction leg and having an opening hole and a bottom part, a piston accommodated in the outer cylinder, a piston rod protruding from the outer cylinder through the opening hole, and a threaded portion provided at a distal end of the piston rod and screwed into a lower end portion of the sub leg;
- the urging means has a compression coil spring accommodated in the outer cylinder and extended between a lower part of the piston and the bottom part of the outer cylinder;
- the regulating means has two liquid chambers partitioned by the piston in the outer cylinder and a first micro clearance ensured between an inner circumferential surface of the outer cylinder and an outer circumferential surface of the piston in order to regulate flowing of a liquid between these liquid chambers;
- and
- the leg adjuster has leakage preventing means for preventing leakage of the liquid from the opening hole.
A leg adjuster used for legged furniture having four or more legs and a load-receiving plate supported directly or indirectly by these legs, wherein
- the legged furniture has three main legs among the legs defining a triangular shape and, assuming that the legged furniture is placed by using only the main legs, enabling a stable stationary attitude of the load-receiving plate;
- and a sub leg other than the main legs;
- the leg adjuster is detachably attached to the sub leg in order to form an extension portion of the sub leg and is capable of expansion and contraction in a vertical direction and provides an expansion and contraction leg in cooperation with the sub leg and autonomously allows expansion or contraction of the expansion and contraction leg on the basis of a length of the main leg in accordance with the stationary attitude of the load-receiving plate;
- and
- the leg adjuster comprises:
- an adjuster body in the form of a hydraulic cylinder, comprising an outer cylinder having an opening hole and a bottom part, a piston accommodated in the outer cylinder, a piston rod protruding from the outer cylinder through the opening hole, and a threaded portion provided at a distal end of the piston rod and screwed into a lower end portion of the sub leg;
- urging means having a compression coil spring accommodated in the outer cylinder and extended between a lower part of the piston and the bottom part of the outer cylinder;
- and
- regulating means having two liquid chambers partitioned by the piston in the outer cylinder and a first micro clearance ensured between an inner circumferential surface of the outer cylinder and an outer circumferential surface of the piston in order to regulate flowing of a liquid between these liquid chambers;
- and
- leakage preventing means for preventing leakage of the liquid from the opening hole.
Dependencies are inferred from the claim text.