Fire door

Patent metadata

Field	Value
Publication number	US-11802438-B2
Application number	US-202117473021-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Sep 16, 2020
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

A fire door includes: an outer frame; a door body; and a center rail, the center rail is provided so as to overlap a target area in a wall orthogonal direction view, and so as to extend in a width direction between a first frame portion and a second frame portion on the side opposite to the wall body with respect to the target area, the center rail and the first frame portion are fixed to each other, the center rail and the second frame portion are engaged with each other with an engaging mechanism interposed therebetween, and the engaging mechanism is configured to allow relative movement of the center rail relative to the second frame portion in the width direction, and to regulate the relative movement thereof in the wall orthogonal direction and a slide direction.

First claim

What is claimed is:

1. A fire door that is to be attached to a wall surface of a wall body that has an opening, the fire door comprising:
an outer frame that is fixed to the wall body;
a door body that is guided by the outer frame so as to move in a slide direction along the wall surface, thereby opening and closing the opening; and
a center rail that is attached to the outer frame,
wherein:
an area in which the door body is located in a state where the opening is closed is defined as a first area, an area in which the door body is located in a state where the opening is open is defined as a second area, a direction that is orthogonal to the wall surface of the wall body is defined as a wall orthogonal direction, a direction that is orthogonal to the slide direction in a wall orthogonal direction view that is a view in the wall orthogonal direction is defined as a width direction, the first area side with respect to the second area in the slide direction is defined as a slide direction first side, and the second area side with respect to the first area in the slide direction is defined as a slide direction second side,
the outer frame includes a first frame portion that is located on a width direction first side that is one side in the width direction with respect to the first area and the second area so as to extend in the slide direction, and a second frame portion that is located on a width direction second side that is the other side in the width direction with respect to the first area and the second area so as to extend in the slide direction,
the center rail is provided so as to overlap a target area in the wall orthogonal direction view, where the target area is an area on the slide direction second side in the first area with respect to the opening in the wall orthogonal direction view, and so as to extend in the width direction between the first frame portion and the second frame portion on the side opposite to the wall body with respect to the target area,
the center rail and the first frame portion are fixed to each other so as to prohibit movement of the center rail relative to the first frame portion in the slide direction, the width direction, and the wall orthogonal direction, and the center rail and the second frame portion are engaged with each other with an engaging mechanism interposed therebetween,
the engaging mechanism is configured to allow relative movement of the center rail relative to the second frame portion in the width direction, and to regulate the relative movement thereof in the wall orthogonal direction and the slide direction,
a portion of the center rail that overlaps the first frame portion in the wall orthogonal direction view, of the center rail, is defined as a first portion, a portion of the center rail that overlaps the second frame portion in the wall orthogonal direction view, of the center rail, is defined as a second portion, the first portion is fixed to the first frame portion, and the second portion is engaged with the second frame portion with the engaging mechanism interposed therebetween,
one side in the wall orthogonal direction on which the center rail is disposed relative to the door body is defined as a wall orthogonal direction first side, and the other side in the wall orthogonal direction on which the wall body is disposed relative to the door body is defined as a wall orthogonal direction second side,
the first frame portion includes a first front-side main body having a portion facing the door body from the wall orthogonal direction first side,
the second frame portion includes a second front-side main body having a portion facing the door body from the wall orthogonal direction first side,
the first portion of the center rail is accommodated in a space in the first front-side main body,
the second portion of the center rail is accommodated in a space in the second front-side main body, and
the center rail is disposed so as not to protrude on the wall orthogonal direction first side from the first frame portion and the second frame portion.

2. The fire door according to claim 1 ,
wherein a moving range of the door body in the slide direction is set so that the first area and the second area partially overlap each other, and
wherein where the first area and the second area overlap each other is defined as an overlapping area, the center rail is located so as to overlap the overlapping area in the wall orthogonal direction view.

3. The fire door according to claim 1 ,
wherein the engaging mechanism includes a surrounding portion that surrounds the center rail from both sides in the slide direction and both sides in the wall orthogonal direction, and
wherein the surrounding portion is provided with a through hole that penetrates therethrough in the width direction and into which the center rail is inserted.

4. The fire door according to claim 1 ,
wherein a surface that faces the door body in the width direction of the first frame portion is defined as a first facing surface, and a surface that faces the door body in the width direction of the second frame portion is defined as a second facing surface, and
wherein a distance between the first facing surface and the second facing surface in the width direction is larger than a dimension obtained by adding an amount of expansion of the door body in the width direction, caused by overheating at the time of fire, to a dimension of the door body in the width direction at room temperature.

5. The fire door according to claim 1 , further comprising:
a back center rail that is provided so as to overlap the target area in the wall orthogonal direction view, and extend in the width direction between the first frame portion and the second frame portion on the wall body side with respect to the target area,
wherein either the first frame portion or the second frame portion is defined as a target frame portion, and the other is defined as a non-target frame portion,
wherein the back center rail and the target frame portion are fixed to each other, and the back center rail and the non-target frame portion are engaged with each other with a back-side engaging mechanism interposed therebetween, and
wherein the back-side engaging mechanism is configured to allow relative movement of the back center rail relative to the non-target frame portion in the width direction, and to regulate the relative movement thereof in the wall orthogonal direction and the slide direction.

6. The fire door according to claim 1 , wherein
the space in the second front-side main body has a dimension which extends from a side edge on the width direction first side of the second front-side main body to a portion of the second-front side main body on the width direction second side relative to a position of an end portion on the width direction second side of the center rail fixed to the first frame portion, and
the space is configured to accommodate a maximum length of the center rail when the center rail has undergone heat expansion.

Assignees

• Daifuku Kk

Inventors

• Yamazaki Takafumi

Classifications

• E06B5/16 Primary

  Fireproof doors or similar closures; Adaptations of fixed constructions therefor · CPC title

• E06B9/04

  of wing type, e.g. revolving or sliding {(trap doors; louvre doors or windows E06B7/08)} · CPC title

• E06B5/167 Primary

  Devices blocking doors or windows inside its frame in case of fire · CPC title

• E06B5/164 Primary

  Sealing arrangements between the door or window and its frame, e.g. intumescent seals specially adapted therefor · CPC title

• E06B3/4407

  Single-hung, i.e. having a single vertical sliding panel · CPC title