Abstract: A lifting table includes a top plate height adjustment device that performs a height adjustment of all support columns in a synchronized manner. The top plate is supported on the floor by of a leg structure provided with multiple support columns arranged in parallel. Top plate receiving structures attach a column to the top plate and change the length of the support columns. Push valves exposed on the inside of the top plate receiving structures are actuated, changing the length of gas springs provided inside of the support columns. By extending an operation rod unit into the top plate receiving structures from a single handle of an operation lever via a connection fitting, the push valves are operated the same amount and at the same time in all of the columns with a single operation, so that it is possible to smoothly raise and lower the top plate.

Abstract: Each of a plurality of leg units (U1 to U4) for supporting a top plate (2) have a support column (5) and a foot section (6). The plurality of leg units (U1 to U4) are divided into a first leg unit group (G1) along one long side edge “a” of the top plate (2) and a second leg unit group (G2) along the other long side edge “a”. The first operation units (301) corresponding to the first leg unit group (G1) and the second operation units (302) corresponding to the second leg unit group (G2) are operated individually, to change the lengths of the support columns (5) belonging to the leg unit set (G1) and the second leg unit set (G2) to the different lengths, so that the top plate (2) is tilted.

Abstract: A lifting table includes a top plate height adjustment device that performs a height adjustment of all support columns in a synchronized manner. The top plate is supported on the floor by of a leg structure provided with multiple support columns arranged in parallel. Top plate receiving structures attach a column to the top plate and change the length of the support columns. Push valves exposed on the inside of the top plate receiving structures are actuated, changing the length of gas springs provided inside of the support columns. By extending an operation rod unit into the top plate receiving structures from a single handle of an operation lever via a connection fitting, the push valves are operated the same amount and at the same time in all of the columns with a single operation, so that it is possible to smoothly raise and lower the top plate.

Abstract: A lifting table includes a top plate height adjustment device that performs a height adjustment of all support columns in a synchronized manner. The top plate is supported on the floor by of a leg structure provided with multiple support columns arranged in parallel. Top plate receiving structures attach a column to the top plate and change the length of the support columns. Push valves exposed on the inside of the top plate receiving structures are actuated, changing the length of gas springs provided inside of the support columns. By extending an operation rod unit into the top plate receiving structures from a single handle of an operation lever via a connection fitting, the push valves are operated the same amount and at the same time in all of the columns with a single operation, so that it is possible to smoothly raise and lower the top plate.

Abstract: A lifting table is provided which is provided with a top plate height adjustment device which, by performing a height adjustment operation in all of the support columns in a synchronized manner by a single operation, makes it possible to smoothly and reliably adjust the height of the top plate. The top plate 2 of this lifting table 1 is supported on the floor by means of a leg structure 3 provided with multiple support columns 5 arranged in parallel. Top plate receiving structures 20 are for attaching a column 5 to the top plate 2, and to change the length of the support columns 5, push valves 16 exposed on the inside of the top plate receiving structures 20 are actuated, changing the length of gas springs provided inside of the support columns 5.

Abstract: A chair frame structure and method for making the same that allows efficient assembly without dependence on welding, provides reliable strength, and allows production costs to be reduced. The chair frame structure includes a gas spring receiving base into which an end of a gas spring is inserted and abutted is joined to a seat support base of a main seat support unit. The gas spring receiving base is joined to the seat support base using blind rivets applied at a plurality of positions by the operation performed from outside. Since the gas spring receiving base is joined using blind rivets without reliance on welding, it is possible to achieve an efficient, low-cost seat structure that provides adequate strength with a simple structure.