Sliding fire door

Patent metadata

Field	Value
Publication number	US-10619407-B2
Application number	US-201815992687-A
Country	US
Kind code	B2
Filing date	May 30, 2018
Priority date	May 31, 2017
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A sliding fire door is disclosed with an improved tightness of the closure by the door main body. The sliding fire door includes an opening frame, a fire door, and a guiding mechanism. The guiding mechanism includes a guide roller group which includes a plurality of guide rollers arranged one adjacent to another along the slide direction and which is configured to guide the door main body. The guiding mechanism is configured to guide the door main body such that the door main body is moved from an opening position to a closing position. The door main body has a first opposing surface which is oriented toward the wall. The opening frame has a second opposing surface which is oriented toward the first opposing surface of the door main body in the closing position. The guiding mechanism moves the door main body to cause the first opposing surface to be moved closer to the second opposing surface when the door main body is moved from the opening position to the closing position.

First claim

What is claimed is:

1. A sliding fire door provided to a wall which has an opening formed therein, the sliding fire door comprising:
an opening frame at least a portion of which frames the opening;
a fire door comprising a door main body configured to leave open and close the opening;
a guiding mechanism configured to guide the door main body along a slide direction parallel to the wall;
wherein the guiding mechanism includes a plurality of support rollers arranged one adjacent to another along the slide direction,
wherein the guiding mechanism is configured to guide the door main body such that the door main body is allowed to be moved along the slide direction from an opening position for leaving open the opening to a closing position for closing the opening,
wherein the plurality of support rollers support a weight of the door main body with a peripheral surface that surrounds an axis of rotation, and the plurality of support rollers are fixed to the opening frame via the axis of rotation,
wherein the door main body has a first opposing surface which is oriented toward the wall,
wherein the opening frame has a second opposing surface which is oriented toward the first opposing surface of the door main body in the closing position, and
wherein the guiding mechanism includes at least one displacing mechanism configured to move the door main body in such a direction as to cause the first opposing surface to be moved closer to the second opposing surface, when the door main body is moved from the opening position to the closing position.

2. The sliding fire door as defined in claim 1 , wherein the slide direction is a horizontal direction,
wherein the door main body is arranged in such an attitude that the door main body extends along a vertical direction and along the slide direction,
wherein the plurality of the support rollers include one or more opening position support rollers each of which supports a portion of the weight of the door main body when the door main body is in the opening position, and one or more closing position support rollers each of which supports a portion of the weight of the door main body when the door main body is in the closing position,
wherein a shape of a peripheral surface or peripheral surfaces of the one or more opening position support rollers is different from a shape of a peripheral surface or peripheral surfaces of the one or more closing position support rollers,
wherein at least a portion of the peripheral surface of each of the one or more closing position support rollers is a sloped surface whose radius decreases toward an end thereof that is closer to the wall, and
wherein the one or more closing position support rollers function as one of the at least one displacing mechanism.

3. The sliding fire door as defined in claim 2 , wherein a radius of an end portion, on a side closer to the wall, of the peripheral surface of each of the one or more opening position support rollers is greater than a radius of an end portion, on a side closer to the wall, of the peripheral surface of each of the one or more closing position support rollers, and
wherein, one of the plurality of support rollers that is located to an open position side of, and closest to, a rearward end, along the slide direction, of the door main body when the door main body is in the closing position is one of the one or more opening position support rollers.

4. The sliding fire door as defined in claim 2 , wherein one or more relay support rollers, each of which has a peripheral surface of a shape that is intermediate between the shape of the peripheral surface of each of the one or more opening position support rollers and the shape of the peripheral surface of each of the one or more closing position support rollers, are located between the one or more opening position support rollers and the one or more closing position support rollers along the slide direction.

5. The sliding fire door as defined in claim 2 , wherein the peripheral surface of each of the one or more opening position support rollers is formed such that a radius of an intermediate portion of the peripheral surface along an axial direction is less than a radius or radii of two end portions, along the axial direction, of the peripheral surface.

6. A sliding fire door provided to a wall which has an opening formed therein, the sliding fire door comprising:
an opening frame at least a portion of which frames the opening;
a fire door comprising a door main body configured to leave open and close the opening;
a guiding mechanism configured to guide the door main body along a slide direction parallel to the wall;
wherein the guiding mechanism includes a guide roller group which includes a plurality of guide rollers arranged one adjacent to another along the slide direction and which is configured to guide the door main body,
wherein the guiding mechanism is configured to guide the door main body such that the door main body is allowed to be moved along the slide direction from an opening position for leaving open the opening to a closing position for closing the opening,
wherein the door main body has a first opposing surface which is oriented toward the wall,
wherein the opening frame has a second opposing surface which is oriented toward the first opposing surface of the door main body in the closing position, and
wherein the guiding mechanism includes at least one displacing mechanism configured to move the door main body in such a direction as to cause the first opposing surface to be moved closer to the second opposing surface, when the door main body is moved from the opening position to the closing position,
wherein the at least one displacing mechanism includes at least one movable member which is moved by the door main body when the door main body is moved to the closing position, and
wherein each of at least one movable member has a moved portion which is pushed and moved by the door main body being moved to the closing position, and a pressing portion configured to push the door main body toward the wall as the moved portion is moved.

7. The sliding fire door as defined in claim 6 , wherein each of the at least one movable member further includes a connecting portion which connects the moved portion and the pressing portion to each other, and a rotatably supporting portion which supports the connecting portion such that the connecting portion is rotatable with respect to the wall,
wherein the moved portion is connected to a first portion of the connecting portion that is located to one side of the rotatably supporting portion whereas the pressing portion is connected to a second portion of the connecting portion that is located to the other side of the rotatably supporting portion,
wherein the connecting portion is formed to have a shape that is bent such that the first portion extends along a direction that intersects a direction along which the second portion extends, as seen along an opposing direction which is a direction perpendicular to the first opposing surface,
wherein the moved portion is pushed and moved by the door main body being moved to the closing position,
wherein the pressing portion has a pressing surface which is caused to contact an non-opposing surface of the door main body, that is on an opposite side of the door main body from the first opposing surface, by a pivoting movement of the movable member with the rotatably supporting portion located in an area of a center of the pivoting movement that accompanies the movement of the moved portion, and
wherein the pressing surface is a sloped surface that is sloped such that the sloped surface is spaced farther from the wall toward an edge of the pressing surface along a direction of the pivoting movement of

Assignees

• Daifuku Kk

Inventors

• Kawabe Naoki
• Ogawa Nobuo
• Hosaka Yoshihiro
• Yamazaki Takafumi

Classifications

• B61D19/005

  sliding (B61D19/008, B61D19/009 take precedence) · CPC title

• E05D15/0691

  Top guides · CPC title

• E05Y2800/12

  Sealing · CPC title

• E05Y2900/134

  Fire doors · CPC title

• E05D15/0665 Primary

  on wheels with fixed axis · CPC title