Rope hoist

Patent metadata

Field	Value
Publication number	US-10486948-B2
Application number	US-201615570830-A
Country	US
Kind code	B2
Filing date	Mar 16, 2016
Priority date	May 1, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A rope hoist includes a rope drum mechanism easy to attach to a frame structure and clarified positioning reference. The rope drum is rotatably supported by a first support part on one end side and a second support part on another end side of the rope drum. A pair of supporting ribs having clearances with respect to a first drum support frame is provided with the first support part. A first connection member penetrates the supporting ribs and the first drum support frame in a state of both-end support. A second connection member penetrates a frame attachment portion and a second drum support frame in a state of cantilever. A support shaft couples the first support part and the second support part and is arranged on an axis passing through a position different from positions of the first connection member and the second connection member.

First claim

The invention claimed is:

1. A rope hoist which hoists and lowers a cargo suspended from the rope host via a wire rope by changing a winding length of the wire rope due to rotation of a rope drum, the rope hoist comprising:
a frame structure including a first drum support frame and a second drum support frame which project to the rope drum side, the frame structure supporting parts;
a first support part which rotatably supports the rope drum on one end side in an axial direction of the rope drum;
a second support part which rotatably supports the rope drum on another end side in the axial direction of the rope drum;
a pair of supporting ribs which are provided with the first support part and arranged in a state of having clearances with respect to the first drum support frame and in a state of holding the first drum support frame therebetween;
a first connection member which penetrates the pair of supporting ribs and the first drum support frame and is thereby mechanically connected to the first drum support frame in a state of the pair of supporting ribs being both-end support;
a frame attachment portion which is provided on the second support part and comes, at least a part thereof, into surface contact with the second drum support frame;
a second connection member which penetrates the frame attachment portion and the second drum support frame and is thereby mechanically connected to the second drum support frame in a state of the frame attachment portion being cantilever; and
a support shaft which couples the first support part and the second support part and is arranged on an axis passing through a position different from positions of the first connection member and the second connection member.

2. The rope hoist according to claim 1 , wherein
the first support part is a gear body to which a drum motor configured to apply driving force of rotating the rope drum is attached and which pivotally supports a gear train configured to transmit the driving force of the drum motor to the rope drum.

3. The rope hoist according to claim 1 , wherein:
the second connection member includes a cylindrical connection cylinder, and a coupling bolt being inserted to the connection cylinder; and
the first connection member includes a columnar or cylindrical connection pin, and coming-off preventing members which prevent coming off of the connection pin at projecting portions of the connection pin projecting from the pair of supporting ribs.

4. The rope hoist according to claim 2 , wherein:
the second connection member includes a cylindrical connection cylinder, and a coupling bolt being inserted to the connection cylinder; and
the first connection member includes a columnar or cylindrical connection pin, and coming-off preventing members which prevent coming off of the connection pin at projecting portions of the connection pin projecting from the pair of supporting ribs.

5. The rope hoist according to claim 1 , wherein
the first connection member and the second connection member are arranged on the same axis.

6. The rope hoist according to claim 2 , wherein
the first connection member and the second connection member are arranged on the same axis.

7. The rope hoist according to claim 3 , wherein
the first connection member and the second connection member are arranged on the same axis.

8. The rope hoist according to claim 4 , wherein
the first connection member and the second connection member are arranged on the same axis.

Assignees

• Kito Kk

Inventors

• Kosuga Kosuke
• Yudate Fujito

Classifications

• B66D5/02

  Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes · CPC title

• B66D3/26 Primary

  Other details, e.g. housings · CPC title

• B66C13/50

  Applications of limit circuits or of limit-switch arrangements (for winding mechanisms B66D1/56) · CPC title

• B66D1/56

  Adaptations of limit switches · CPC title

• B66D1/22

  Planetary or differential gearings (for actuating grab buckets B66D1/70 ){, i.e. with planet gears having movable axes of rotation} · CPC title