Lifting/lowering device

Patent metadata

Field	Value
Publication number	US-11618657-B2
Application number	US-202217711035-A
Country	US
Kind code	B2
Filing date	Apr 1, 2022
Priority date	Apr 10, 2019
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

The lifting/lowering device (100) includes: a first plate member (51); a second plate member (52) to which the first plate member (51) is rotatably connected; a first expansion and contraction bag (31) which is disposed between the first plate member (51) and the second plate member (52) and is capable of expanding and contracting by gas supply and exhaust; a third plate member (53) to which the second plate member (52) is rotatably connected; a second expansion and contraction bag which is disposed between the second plate member (52) and the third plate member (53) and is capable of expanding and contracting by gas supply and exhaust. The first plate member (51), the first expansion and contraction bag (31), the second plate member (52), the second expansion and contraction bag (32) and the third plate member (53) are disposed so as to overlap in a plan view.

First claim

What is claimed is:

1. A lifting/lowering device, characterized in that, comprising:
a first plate member which is arranged on a side where an object to be lifted/lowered is disposed;
a second plate member which is disposed below the first plate member and has a first side to which the first plate member is rotatably connected;
a first expansion and contraction bag which is disposed between the first plate member and the second plate member and is capable of expanding and contracting by gas supply and exhaust;
a third plate member which is disposed below the second plate member and to which the second plate member is rotatably connected at a second side different from the first side of the second plate member; and
a second expansion and contraction bag which is disposed between the second plate member and the third plate member and is capable of expanding and contracting by gas supply and exhaust, wherein
the first expansion and contraction bag is fixed at one end thereof by a fixing portion in a manner of being pulled to a side of a rotation axis between the first plate member and the second plate member, and
the second expansion and contraction bag is fixed at one end thereof by a fixing portion in a manner of being pulled to a side of a rotation axis between the second plate member and the third plate member.

2. The lifting/lowering device according to claim 1 , wherein each of the first expansion and contraction bag and the second expansion and contraction bag has an annular part arranged at the one end thereof, and each of the first expansion and contraction bag and the second expansion and contraction bag is fixed at the one end thereof by passing the fixing portion through hole in the annular part and being pulled.

3. The lifting/lowering device according to claim 1 , wherein each of the first expansion and contraction bag and the second expansion and contraction bag is configured by stacking a plurality of bags, and one ends of the plurality of stacked bags are welded or bonded together and fixed by being pulled.

4. The lifting/lowering device according to claim 3 , wherein each of the stacking bags is formed by welding or bonding edges of two sheet-like members and which is substantially flat when contracted.

5. The lifting/lowering device according to claim 1 , wherein the first plate member, the second plate member, and the third plate member are configured to be wrapped by a sheet, and each of the first expansion and contraction bag and the second expansion and contraction bag is fixed to the sheet or a corresponding plate member among the first plate member, the second plate member and the third plate member at the one side by being pulled.

6. The lifting/lowering device according to claim 1 , wherein the first plate member, the first expansion and contraction bag, the second plate member, the second expansion and contraction bag and the third plate member are disposed so as to overlap in a plan view.

7. The lifting/lowering device according to claim 1 , wherein the second plate member has a substantially trapezoidal shape having a long side and a short side parallel to each other in a plan view, and
the first plate member or the second plate member is rotated around a rotation axis along a side intersecting the long side and the short side parallel to each other in the substantially trapezoidal shape of the second plate member.

8. The lifting/lowering device according to claim 1 , further comprising:
a fourth plate member which is disposed below the third plate member and has a fifth side to which the third plate member is rotatably connected at a fourth side different from a third side of the third plate member connected to the second plate member;
a third expansion and contraction bag which is disposed between the third plate member and the fourth plate member and is capable of expanding and contracting by gas supply and exhaust;
a fifth plate member which is disposed below the fourth plate member and to which the fourth plate member is rotatably connected at a sixth side different from the fifth side of the fourth plate member, and
a fourth expansion and contraction bag which is disposed between the fourth plate member and the fifth plate member and is capable of expanding and contracting by gas supply and exhaust, wherein
the first plate member, the first expansion and contraction bag, the second plate member, the second expansion and contraction bag, the third plate member, the third expansion and contraction bag, the fourth plate member, the fourth expansion and contraction bag and the fifth plate member are disposed so as to overlap in a plan view, and
at least two of the rotation axes when the first plate member, the second plate member, the third plate member, the fourth plate member and the fifth plate member are rotated intersect in a plan view.

Assignees

• Funai Electric Co

Inventors

• Wakabayashi Naoyuki
• Tanaka Fuminori
• Sugimoto Jun

Classifications

• B66F7/22

  with tiltable platforms (tilting vehicles for unloading B65G67/34) · CPC title

• B66F7/28

  Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions · CPC title

• B66F3/35 Primary

  Inflatable flexible elements, e.g. bellows (inflatable load-engaging elements B66F3/40; connection of valves to inflatable elastic bodies B60C29/00) · CPC title

• B66F3/42

  with self-contained pumps, e.g. actuated by hand · CPC title

• B66F3/247 Primary

  pneumatically actuated (B66F3/35 takes precedence) · CPC title