# US 8,464,470 B2 · Railway platform door device

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- Number: US 8,464,470 B2
- Document ID: US8464470B2
- Status: Granted
- Kind: B2
- Application number: 13/201,493
- Filed: 2010-02-19
- Published: 2012-02-09
- Granted: 2013-06-18
- Earliest claimed: 2009-02-19
- Assignees: Nabtesco Corporation
- Applicants: Satoshi Katagata; Kota Iwasaki; Masanori Furukawa; Takeshi Fuse; Hiromasa Tsutsumi
- Inventors: Satoshi Katagata; Kota Iwasaki; Masanori Furukawa; Takeshi Fuse; Hiromasa Tsutsumi
- Web page: https://patentgrep.com/patent/US8464470B2

## CPC

- B61B 1/02: General arrangement of stations and platforms including protection devices for the passengers {(B61B1/005 takes precedence)}
- E05D 15/0617: {of cantilever type}
- E05F 15/643: operated by flexible elongated pulling elements, e.g. belts, chains or cables (by flexible elongated push-pull mechanisms E05F15/635)
- E05Y 2201/652: Belts
- E05Y 2900/402: for cantilever gates
- E05Y 2900/404: for railway platform gates
- E06B 11/045: {exclusively for horizontally sliding gates}
- B61B: RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR (lifts or hoists, elevators, escalators, moving walkways B66B)
- E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00)
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)

## Abstract

Provided is a platform door device which makes it possible to reduce the length of time for a replacement operation when a panel-shaped portion of a door is damaged. The platform door device comprises a door, and a driving mechanism for moving the door forwardly and backwardly to close and open a gate on a platform. The driving mechanism includes a motor, a rotation body adapted to be rotated by the motor, and a driven body adapted to be driven according to the rotation of the rotation body so as to move the door, and the door has a panel-shaped main body, and a base segment detachably joined to the main body and attached to the driven body.

## Claims

### Claim 1

A platform door device comprising a guide body installed on a platform, a door, a driving mechanism for moving the door forwardly and backwardly to close and open a gate on the platform, and a guiding mechanism for guiding the door being moved forwardly or backwardly, wherein:
the driving mechanism includes a motor, a rotation body adapted to be rotated by the motor, and a driven body adapted to be driven according to the rotation of the rotation body so as to move the door; and
the door moves forwardly or backwardly with at least a part of the door being located inside the guide body, and includes a panel-shaped main body, and a base segment, the base segment being detachably joined to the main body and to which the driven body is attached;
the guiding mechanism includes a linear rail extending in a direction of the movement of the door, and a guide block adapted to be slidingly moved with respect to the linear rail;
the main body includes a frame assembly that is formed in a frame shape by assembling a plurality of frame members together;
the base segment is joined to the frame assembly so that at least a part of the guide block is located within a thickness range of the frame assembly and includes a mounting portion and an extension portion, the mounting portion having a lower section, the extension portion extending downward from the lower section of the mounting portion and having a thickness less than a thickness of the frame assembly;
the lower section of the mounting portion having a portion that is located within the thickness range of the frame assembly and is mounted with one of the linear rail and the guide block; and
the driven body being located within the thickness range of the frame assembly at a position lower than one of the linear rail and the guide block and being joined to a lower end portion of the extension portion.

### Claim 2 (depends on 1)

The platform door device according to claim 1, wherein the driving mechanism includes a pair of pulleys separately arranged on respective ones of opposite sides of the rotation body, and wherein:
the rotation body has teeth;
the driven body consists of a belt member which is wound over the pair of pulleys and meshed with the teeth of the rotation body at a position between the pulleys; and
the lower end portion of the extension portion is provided with a first belt joining portion joined to one end of the belt member, and a second belt joining portion joined to the other end of the belt member while allowing the belt member to be tightened with a given tension.

### Claim 3 (depends on 2)

The platform door device according to claim 2, wherein a remaining one of the linear rail and the guide block is fixed to the guide body.

### Claim 4 (depends on 3)

The platform door device according to claim 3, wherein the extension portion is located on a side opposite to a track with respect to the linear rail and the guide block, and formed with a cutout for exposing at least a part of the linear rail and the guide block.

### Claim 5 (depends on 4)

The platform door device according to claim 4, which comprises a cover, for covering the cutout, that is detachably attached to the base segment.

### Claim 6 (depends on 1)

The platform door device according to claim 1, wherein a remaining one of the linear rail and the guide block is fixed to the guide body.

### Claim 7 (depends on 6)

The platform door device according to claim 6, wherein the extension portion is located on a side opposite to a track with respect to the linear rail and the guide block, and formed with a cutout for exposing at least a part of the linear rail and the guide block.

### Claim 8 (depends on 7)

The platform door device according to claim 7, which comprises a cover, for covering the cutout, that is detachably attached to the base segment.