JP5937290B2 - Revolving fire door - Google Patents

Description

  The present invention relates to a rotary fire door. In particular, it is a revolving fireproof door that is placed in an opening of a building or the like, and a two-wing door body is rotatable around a rotation axis. When the door body closes the opening, the heating side is not heated. The present invention relates to a structure of a rotary type fire door that eliminates a gap penetrating toward the door.

  The “fire prevention zone” defined in the Japanese Building Standards Law has a role to stop fire locally by providing provisions such as the installation of fire prevention equipment such as fire-resistant floors, fire walls and fire doors. The fire door is normally accessible to people. On the other hand, in the event of a fire, the flame can be blocked by closing the opening with a fire door. And the expansion of the fire from a fire origin can be prevented, or the fire spread from other than a fire origin can be prevented.

  Many of the fire doors installed in the “fire prevention zone” are hinged doors. The hinged door is configured such that one end portion of the door body is rotatably connected by a hinge and the other end portion of the door body is openable and closable. Generally, a single door is provided with a door closer to automatically close the door body.

  For example, in the event of a fire, when a refugee opens a single door with a door closer and attempts to move to an evacuation site, if a strong wind acts on the door body, the wind pressure with the closing force of the door closer added. Against this, it may be difficult to open the door body. In particular, it may be difficult for a weak person such as a child or an elderly person to open the door body.

  On the other hand, when a single door with a door closer is closed, if a strong wind acting against the closing force of the door closer acts on the door body, the closing force of the door closer alone cannot completely close the door body, and the flame It becomes difficult to block.

  For the problems described above, there is a rotary fire door in which a rotary shaft extending in the vertical direction is arranged at the center in the width direction of the fire door main body, and the fire door main body is configured to be rotatable around the rotary shaft. It is disclosed (for example, see Patent Document 1).

  When a strong wind acts in the surface direction of the door body, the rotary fire door according to Patent Document 1 rotates the left half of the door body in one direction and the right half of the door body in the other direction. Since the rotating force is offset, the door body can be easily rotated in the same manner as when there is no wind. The door body can be easily opened even by a weak person such as a child or an elderly person. Further, the door body can be reliably closed by using an appropriate closing mechanism.

  In addition, as an example of installing a single-open fire door at the entrance, the child door can be connected to the parent door so that the child door can be opened and closed, and the child door can be locked from the outside to the parent door at three points. A steel door with a child door configured to automatically return the child door when escaped is disclosed (see, for example, Patent Document 2).

JP-A-4-73194 JP 2013-108344 A

  If a rotary fire door having a rotating shaft extending in the vertical direction as disclosed in Patent Document 1 is installed in a passage of a building or the like, the guide member of the door body except for the bearing that supports the lower end of the rotating shaft Alternatively, since it is not necessary to project the slide member from the floor surface, so-called barrier-free operation is achieved, and the passage of the passage is facilitated.

  In general, a single-opening type fireproof door surrounds three sides of the door main body with a frame body except for the floor surface. And the single-opening type fireproof door is provided with a door stop in these frame bodies and brought into contact with the peripheral edge of the door body, thereby eliminating a gap penetrating from the heating side toward the non-heating side.

  The rotary fireproof door disclosed in Patent Document 1 can provide a door stop on a pair of frames facing both side surfaces of the door body, and eliminate a gap penetrating from the heating side to the non-heating side. .

  However, the rotary fire door disclosed in Patent Document 1 has a door body that rotates about the rotation axis. Therefore, the door contact provided on the frame facing the top surface of the door body is divided into left and right sides, and the heating side It was difficult to eliminate gaps penetrating toward the non-heated side. There is a demand for a structure that eliminates a gap penetrating from a heating side to a non-heating side in a rotary fire door having a rotating shaft extending in the vertical direction.

  Moreover, although the fire door by patent document 2 can open a child door in the direction opposite to the direction which a parent door opens, it cannot open a child door unless it cancels | releases a lock, and evacuation of a person is given priority. Sometimes it is difficult to expect to unlock the child door.

  By installing a rotating child door with a rotating shaft that extends in the horizontal direction on the parent door, which is a fire door, it is an emergency from the child door without unlocking the child door in an emergency where priority is given to evacuating the child. You can escape.

  However, since the child door rotates around the rotation axis extending in the horizontal direction, the door contact provided on the frame facing both side surfaces of the child door is divided into upper and lower parts, and the gap that penetrates from the heating side toward the non-heating side It was difficult to eliminate. In a fire door having a rotary child door having a rotating shaft extending in the horizontal direction, there is a demand for a structure that eliminates a gap penetrating from the heating side toward the non-heating side. The above can be said to be the subject of the present invention.

  This invention is made | formed in view of such a subject, and it aims at providing the rotary fire prevention door which eliminated the clearance gap penetrated toward a non-heating side from a heating side.

  The present inventor includes a door body having a rotation shaft protruding from one thickness surface, and a frame body having an inner wall surface facing the one thickness surface with a predetermined gap, the door centering on the rotation shaft. A rotary fire door in which the body is rotatably connected to the frame, and a cylindrical bearing portion having a bearing hole that receives the rotation shaft and is rotatably connected protrudes from the inner wall surface of the frame. The first door contact portion that contacts the one surface of the body is continued from the first tangential direction of the bearing portion to the bearing portion, and the second door contact portion that contacts the other surface of the door body is the second tangent of the bearing portion. It is thought that the gap that penetrates from the heating side to the non-heating side can be eliminated by making the bearing part continuous from the direction, and based on this, the following new rotary fire doors have been invented. It was.

  (1) A rotary fire door according to the present invention includes a door body having a cylindrical rotating shaft protruding from at least one thickness surface, and an inner wall surface facing the one thickness surface with a predetermined gap. A rotary fire door in which the door body is rotatably connected to the frame body around the rotation axis, the frame body protruding from an inner wall surface of the frame body, A cylindrical bearing portion that has a bearing hole that receives a rotation shaft and is rotatably connected, and a gap between the one wing of the door body and the frame body in contact with one surface of the door body. A first door contact portion that is continuous with the bearing portion from a first tangential direction of the outer periphery of the bearing portion; and the other one wing of the door body and the frame body in contact with the other surface of the door body A second door stop portion continuous from the second tangential direction of the outer periphery of the bearing portion to the bearing portion. The door body forms a circular arc wall that continues to the outer periphery of the rotating shaft, and has a pair of groove portions that are recessed from the thickness surface of the door body. An arc groove having a bottom surface and having a partial arc wall facing the arc wall, and a second bottom surface recessed from the first bottom surface of the arc groove, and facing the arc wall; A deformed groove having a flat wall continuous with the partial arc wall, and the flat wall of the deformed groove is in contact with the outer wall of the first door contact portion or the outer wall of the second door contact portion. The pivot angle of the door body relative to the frame body is defined, and the pair of arc grooves are closed by the bearing portion so that there is no gap penetrating from one surface of the door body to the other surface, The door body is detoured from one surface to the other surface.

  (2) The rotating shaft may be a vertical axis whose rotation center extends in the vertical direction, and the door body may be a two-wing fire door body that can open and close an opening of a building.

  (3) The rotating shaft is composed of a pair of horizontal shafts whose center of rotation extends in the horizontal direction, and the door body is connected by a pair of the horizontal shafts so that an opening provided in a main door as a fire door can be opened and closed. It may consist of a child door.

  (4) The rotating shaft includes a pair of horizontal shafts whose center of rotation extends in a horizontal direction, and the door body includes a lid body that is connected to the opening provided on the floor surface by the pair of horizontal shafts so as to be freely opened and closed. It may be.

  (5) It is preferable that the opening provided in the main door is opened to such an extent that a person can pass therethrough.

  The rotary fireproof door according to the present invention is provided with a cylindrical bearing portion having a bearing hole that rotatably connects a rotating shaft protruding from a thickness surface of the door body, on one side of the door body or Since the 1st door contact part and 2nd door contact part which can be contact | abutted on the other surface are made to continue to the bearing part, the clearance gap penetrated from one surface of the door body to the other surface can be eliminated.

It is a front view which shows the structure of the rotary type fire door by 1st Embodiment of this invention. It is a cross-sectional view which shows the structure of the rotary fireproof door by 1st Embodiment. It is a figure which shows the structure of the rotating shaft with which the rotary fire prevention door by 1st Embodiment is equipped, FIG. 3 (A) is a front view of a rotating shaft, FIG.3 (B) is A- of FIG. 3A is a cross-sectional view taken along line BB in FIG. 3A, and FIG. 3D is a cross-sectional view taken along line CC in FIG. 3A. It is a perspective view which shows the structure of the rotating shaft with which the rotary fire prevention door by 1st Embodiment is equipped, and is the state figure which arrange | positioned the shaft part provided in the door body side, and the bearing part provided in the frame side. It is a perspective view which shows the structure of the rotating shaft with which the rotary fire prevention door by 1st Embodiment is equipped, and is the state figure which arrange | positioned the shaft part provided in the door body side, and the bearing part provided in the frame side. It is a figure which shows the structure of the rotating shaft with which the rotary fire prevention door by 1st Embodiment is equipped, FIG. 6 (A) is the rotation shown in the state rotated relatively so that a door body might orthogonally cross with respect to a frame. 6B is a cross-sectional view taken along the line AA in FIG. 6A, FIG. 6C is a cross-sectional view taken along the line BB in FIG. 6A, and FIG. FIG. 6D is a cross-sectional view taken along the line CC in FIG. It is a top view which shows the state which has arrange | positioned the rotary fire prevention door by 1st Embodiment in the cross | intersection part of a pair of channel | paths which cross | intersected so that it might mutually orthogonally cross. It is a front view which shows the structure of the rotary type fireproof door by 2nd Embodiment of this invention. It is a cross-sectional view which shows the structure of the rotary fireproof door by 2nd Embodiment. It is a longitudinal cross-sectional view which shows the structure of the rotary fire prevention door by 2nd Embodiment, and is a state figure which the child door closed the opening part provided in the main door. It is a longitudinal cross-sectional view which shows the structure of the rotation-type fire prevention door by 2nd Embodiment, and is a state figure which the child door rotated in one direction with respect to the main door. It is a figure which shows the structure of the rotating shaft with which the rotary fire prevention door by 2nd Embodiment is equipped, FIG. 12 (A) is a front view of a rotating shaft, FIG.12 (B) is A- of FIG. 12A is a cross-sectional view taken along line BB in FIG. 12A, and FIG. 12D is a cross-sectional view taken along line CC in FIG. 12A. It is a perspective view which shows the structure of the rotating shaft with which the rotary fire prevention door by 2nd Embodiment is equipped, and is the state figure which arrange | positioned the axial part provided in the child door side, and the bearing part provided in the parent door side. It is a perspective view which shows the structure of the rotating shaft with which the rotary fire prevention door by 2nd Embodiment is equipped, and is the state figure which arrange | positioned the axial part provided in the child door side, and the bearing part provided in the parent door side. It is a figure which shows the structure of the rotating shaft with which the rotary fire prevention door by 2nd Embodiment is equipped, FIG.15 (A) is a front view of the rotating shaft shown in the state which inclined the child door at right angle with respect to the main door, 15 (B) is a cross-sectional view taken along the line AA in FIG. 15 (A), FIG. 15 (C) is a cross-sectional view taken along the line BB in FIG. 15 (A), and FIG. It is CC sectional view taken on the line of 15 (A).

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[First Embodiment]
(Configuration of revolving fire door)
First, the configuration of the rotary fire door according to the first embodiment of the present invention will be described. FIG. 1 is a front view showing a configuration of a rotary fire door according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the configuration of the rotary fire door according to the first embodiment.

  FIG. 3 is a diagram illustrating a configuration of a rotary shaft provided in the rotary fire door according to the first embodiment. FIG. 3 (A) is a front view of the rotary shaft, and FIG. 3 (B) is FIG. 3A is a cross-sectional view taken along the arrow AA in FIG. 3, FIG. 3C is a cross-sectional view taken along the line B-B in FIG. 3A, and FIG. 3D is a cross-sectional view taken along the line CC in FIG. FIG.

  FIG. 4 is a perspective view showing a configuration of a rotary shaft provided in the rotary fireproof door according to the first embodiment, and is a state diagram in which a shaft portion provided on the door body side and a bearing portion provided on the frame body side are arranged to face each other. . FIG. 5 is a perspective view showing a configuration of a rotary shaft provided in the rotary fire prevention door according to the first embodiment, and is a state diagram in which a shaft portion provided on the door body side and a bearing portion provided on the frame body side are arranged to face each other. .

  FIG. 6 is a diagram illustrating a configuration of a rotating shaft provided in the rotary fireproof door according to the first embodiment, and FIG. 6A is rotated relatively so that the door body is orthogonal to the frame body. 6B is a cross-sectional view taken along the line AA in FIG. 6A, and FIG. 6C is a cross-sectional view taken along the line BB in FIG. 6A. FIG. 6D is a cross-sectional view taken along the line CC in FIG.

(overall structure)
Referring to FIG. 1 or FIG. 2, a rotary fire door (hereinafter abbreviated as fire door) 10 according to a first embodiment of the present invention is a two-wing fire door body 1 and a frame body 2 which are door bodies. It has. The fire door main body 1 can open and close the opening 1h provided in the building. The frame 2 surrounds three sides except the bottom surface of the fire door main body 1. The frame body 2 includes a frame body 21f extending in the horizontal direction and a pair of frame bodies 22f and 22f extending in the vertical direction. The pair of frames 22f and 22f are fixed to the fire wall W (see FIG. 2).

  1 or 2, the fire door 10 includes a pair of rotating shafts 3 and 4. The set of rotating shafts 3 and 4 is composed of a vertical axis whose virtual rotation center Q extends in the vertical direction. The upper rotating shaft 3 is rotatably connected to the frame body 21f. The lower rotating shaft 4 is rotatably connected to a bearing member 41 embedded in the floor surface FL.

  Referring to FIG. 2, the fire door main body 1 closes the passage G. In the state shown in FIG. 2, when a fire occurs on one passage G side, it is possible to prevent a flame from entering the other passage G side. By rotating the fire door main body 1 counterclockwise around the rotation center Q, the passage G can be moved.

(Structure of door body)
Next, the structure of the fire door main body used as a door body is demonstrated. Referring to FIG. 1 or FIG. 2, the fire door main body 1 is formed into a bag shape having a hollow inside so as to have a predetermined thickness by bending and welding a steel plate. It is preferable that a heat insulating material is accommodated inside the fire door main body 1.

  Referring to FIG. 1 or FIG. 2, the fire door main body 1 includes a pair of rectangular columnar vertical frame members 11 and 11. The pair of vertical frame members 11 and 11 are fixed to both side surfaces of the fire door main body 1. Further, the fire door main body 1 includes a square columnar intermediate horizontal frame member 30 and a pair of square columnar horizontal frame members 13f and 13f (see FIG. 3). The intermediate horizontal frame member 30 and the pair of horizontal frame members 13f and 13f are fixed to the upper surface of the fire door main body 1.

  Referring to FIG. 2, the vertical frame member 11 fixed to the right half 1Rh side of the fire door main body 1 abuts the vertical frame 21v of the first door stop 21s, so that the inner wall of the opening 1h and the fire door main body The gap d with the right half 1Rh of 1 can be closed. The vertical frame member 11 fixed to the left half 1Lh side of the fire door main body 1 abuts on the vertical frame 22v of the second door contact portion 22s, so that the inner wall of the opening 1h and the left half 1Lh of the fire door main body 1 The gap d can be closed.

  Referring to FIG. 3, the intermediate horizontal frame member 30 has convex portions at both ends thereof. On the other hand, the horizontal frame member 13f has a concave portion at its end. By disposing on the upper surface of the fire door main body 1 so that the convex portion of the intermediate horizontal frame member 30 and the concave portion of the horizontal frame member 13f are fitted, it penetrates from one surface of the fire door main body 1 to the other surface. It is configured so that there is no gap.

  Referring to FIG. 1, the fire door main body 1 has a door knob 14 disposed in the right half 1Rh. By rotating the door knob 14, a latch bolt (not shown) connecting the fire door main body 1 and the frame body 22f is released, and the fire door main body 1 can be opened. When the fire door main body 1 is closed, a latch bolt (not shown) is automatically restored so that the fire door main body 1 cannot be easily opened by wind pressure or the like. A door knob 15 is also arranged in the left half 1Lh of the fire door main body 1.

  With reference to FIG. 1, the fire door body 1 can be opened by holding the door knob 14 of the right half 1 </ b> Rh and pressing the door knob 14. Similarly, when the door knob 15 of the left half 1Lh is gripped and the door knob 14 is pulled, the fire door main body 1 can be opened. Door knobs 14 and 15 are also provided on the side opposite to the paper surface of FIG. 1, and the fire door main body 1 can be rotated by gripping one of these door knobs 14 and 15.

(Configuration of rotating shaft)
Next, the configuration of the rotating shaft will be described while supplementing the configuration of the frame. Referring to FIGS. 3 to 6, the rotating shaft 3 is constituted by a cylindrical bearing portion 31 and a columnar boss 32. The bearing portion 31 protrudes from the inner wall of the frame body 21 f provided on the frame body 2. Moreover, the bearing part 31 has opened the circular bearing hole 31h which receives the boss | hub 32 and connects rotatably.

  Referring to FIGS. 6 to 9, the boss 32 protrudes from one surface of the intermediate horizontal frame member 30. The intermediate horizontal frame member 30 is disposed between the pair of horizontal frame members 13 f and 13 f disposed on the upper surface of the fire door main body 1. The intermediate horizontal frame member 30 is provided with a pair of female screw portions 30s and 30s. The intermediate horizontal frame member 30 can be fixed to the upper surface of the fire door main body 1 by screwing into the female screw portion 30s from the inside of the child door 6 using the bolt member 30b (see FIG. 3D).

  Referring to FIG. 3B or FIG. 4 and FIG. 6B, the bearing portion 31 has an annular thick portion 31w continuous from the first tangential direction to the horizontal frame 21h of the first door stop portion 21s. ing. The horizontal frame 21h of the first door contact portion 21s is in contact with one surface of the intermediate horizontal frame member 30 and the horizontal frame member 13f, and can close the gap between the right half 1Rh of the fire door main body 1 and the frame body 21f. (See FIG. 1).

  Further, referring to FIG. 3B or FIG. 4 and FIG. 6B, the bearing portion 31 has an annular thick portion 31w from the second tangential direction to the horizontal frame 22h of the second door contact portion 22s. It is continuous. The horizontal frame 22h of the second door contact portion 22s can abut against the other surfaces of the intermediate horizontal frame member 30 and the horizontal frame member 13f to close the gap between the left half 1Lh of the fire door main body 1 and the frame body 21f. (See FIG. 1).

  Thus, the bearing 31 is shielded by the first door contact portion 21s and the second door contact portion 22s so that there is no gap penetrating from one surface of the fire door main body 1 toward the other surface. .

  Referring to FIG. 3C or FIG. 5 and FIG. 6C, the intermediate horizontal frame member 30 forms a pair of grooves 30d and 30d that are recessed from the outer periphery of the boss 32. The arc wall formed in the groove 30 d is continuous with the outer periphery of the boss 32. The pair of groove portions 30 d and 30 d can guide the outer periphery of the bearing portion 31.

  Referring to FIG. 3 (C) or FIG. 5 and FIG. 6 (C), the groove portion 30d is constituted by an arc groove 31d and a deformed groove 32d. The arc groove 31d has a first bottom surface with which the front end surface of the bearing portion 31 abuts. The arc groove 31d has a partial arc wall that faces the arc wall of the groove 30d. The irregular groove 32d has a second bottom surface that is recessed from the first bottom surface of the arc groove 31d by providing a step. The deformed groove 32d has a flat wall 32w facing the arc wall of the groove 30d and continuing to the partial arc wall of the arc groove 31d (see FIG. 3C).

  Referring to FIG. 6B, the flat wall 32w formed in the deformed groove 32d abuts against the horizontal frame 21h and the horizontal frame 22h, so that the rotation angle of the fire door main body 1 relative to the frame body 2 can be defined ( (See FIG. 2).

  Further, referring to FIG. 3C or FIG. 5 and FIG. 6C, the pair of arcuate grooves 31d and 31d does not allow a gap to penetrate from one surface of the fire door body 1 to the other surface. The bearing portion 31 is closed. Further, the pair of arc grooves 31d and 31d detour from one surface of the intermediate horizontal frame member 30 to the other surface so that there is no gap penetrating from one surface of the fire door main body 1 to the other surface. ing.

(Operation of the rotary fire door)
Next, the operation and effect of the fire door 10 according to the first embodiment will be described. 1 to 6, the fire door 10 is provided with a boss 32 that protrudes from the upper surface (thickness surface) of the fire door body 1. Further, the fire door 10 is provided with a cylindrical bearing portion 31 rotatably connected to the boss 32 on a frame body 21f arranged in the horizontal direction. The fire door 10 has the first door contact portion 21 s and the second door contact portion 22 s that can come into contact with one surface or the other surface of the fire door main body 1, and the bearing portion 31. A gap penetrating from one surface of one to the other surface can be eliminated.

  Referring to FIG. 4, the horizontal frame 21 h of the first door contact portion 21 s and the horizontal frame 22 h of the second door contact portion 22 s protrude slightly from the tip surface of the bearing portion 31 with a step. The horizontal frame 21h and the horizontal frame 22h are disconnected in the extending direction thereof. However, as shown in FIG. 3, by inserting the boss 32 into the bearing portion 31, the gap between the horizontal frame 21 h and the horizontal frame 22 h can be shielded by the boss 32. Thereby, the clearance gap penetrated from one surface of the fire door main body 1 toward the other surface can be eliminated.

  On the other hand, referring to FIG. 4, since the horizontal frame 21h and the horizontal frame 22h are slightly protruded from the front end surface of the bearing portion 31 with a step, the fire door main body 1 is rotated by 90 degrees with respect to the frame body 21f. Attempts to make contact with the protruding portions of the horizontal frame 21h and the horizontal frame 22h make rotation difficult. Therefore, a pair of irregularly shaped grooves 32d and 32d are provided (see FIG. 3C) to escape the protruding portions of the horizontal frame 21h and the horizontal frame 22h. Thus, the fire door 10 according to the first embodiment eliminates a gap penetrating from one surface of the fire door main body 1 to the other surface by devising the shapes of the boss 32 and the bearing portion 31, The fire door body 1 is rotatable.

(Application example of a rotating fire door)
Next, an application example of the fire door 10 according to the first embodiment will be described. FIG. 7 is a plan view showing a state in which the rotary fire doors according to the first embodiment are arranged at intersections of a set of passages intersecting so as to be orthogonal to each other.

  Referring to FIG. 7, the fire door 10 has a first state in which a path from the passage Ga to the passage Gc or the passage Gd is blocked, and a second state in which a path from the passage Ga to the passage Gc or the passage Gb is blocked. Can be switched. In the first state of the fire door 10, the path from the path Gb to the path Gc or the path Gd is blocked, but the path Ga and the path Gb can be moved back and forth. On the other hand, in the second state of the fire door 10, the path from the path Gd to the path Gc or the path Gb is blocked, but the path Ga and the path Gd can be moved back and forth.

  Referring to FIG. 7, for example, when the first state of the fire door 10 is set to a normal passage route and the fire occurs on the passage Gb side or the passage Gc side, the fire door body 1 is turned counterclockwise. By rotating 90 degrees at a time, the route from the passage Ga to the passage Gd can be used as an evacuation route. Further, the route from the passage Gd to the passage Ga can be an evacuation route. As described above, the fire door 10 according to the first embodiment can easily switch between a normal passage route and an evacuation route.

[Second Embodiment]
(Configuration of revolving fire door)
Next, the structure of the rotary fire door according to the second embodiment of the present invention will be described. FIG. 8 is a front view showing a configuration of a rotary fire door according to the second embodiment of the present invention. FIG. 9 is a cross-sectional view showing a configuration of a rotary fire door according to the second embodiment.

  FIG. 10 is a longitudinal sectional view showing the configuration of the rotary fire door according to the second embodiment, and is a state diagram in which the child door is closed at the opening provided in the parent door. FIG. 11 is a longitudinal sectional view showing the configuration of the rotary fire door according to the second embodiment, and is a state diagram in which the child door is rotated in one direction with respect to the parent door.

(overall structure)
Referring to FIGS. 8 to 10, the fire door 20 according to the second embodiment of the present invention includes a single-opening type main door 5 and a two-wing rotary child door 6 serving as a door body. The main door 5 is installed difficult to open from the inside of the room Rm toward the hallway Ha side (see FIG. 9 or FIG. 10). Hereinafter, the interior of the room Rm is referred to as “indoor”, and the hallway Ha side is referred to as “outdoor”.

  Referring to FIGS. 8 to 11, the child door 6 closes the opening 5 h provided at the center of the parent door 5. Further, the child door 6 is rotatably connected to the main door 5 so that when the upper half 6sh is opened from the outdoor side to the indoor side, the lower half part 6ih is opened from the indoor side to the outdoor side. And it is also possible to escape from the lower half 6ih of the child door 6 (see FIG. 8).

  8 to 11, the fire door 20 includes a pair of rotating shafts 7 and 7 and a weight 8. The pair of rotation shafts 7 and 7 are horizontal shafts arranged so that their rotation centers Q extend in the horizontal direction. The rotary shaft 7 rotatably connects the inner wall of the opening 5h and the side surface of the child door 6.

  Referring to FIGS. 8 to 11, the weight 8 is disposed at the lower end of the child door 6. The weight 8 urges the force that the lower half 6ih of the child door 6 rotates from the outside to the room from the state where the lower half 6ih of the child door 6 opens from the room to the outside (see FIG. 11).

  8 or 9, the main door 5 has a rectangular opening 5h formed at the center. As will be described later, the opening 5h can be closed by the child door 6. Then, by opening the opening 5h to a size that allows a person to pass, the child door 6 can be opened and an emergency escape can be made from the lower portion of the opening 5h in the event of a disaster.

(Structure of the main door)
Next, the configuration of the main door will be described. Referring to FIGS. 8 to 11, the main door 5 is formed in a bag shape having a hollow inside so as to have a predetermined thickness by bending and welding a steel plate. It is preferable to accommodate a heat insulating material inside the main door 5. It is preferable that the outer shape of the main door 5 is a standard size, and can be 1818 mm × 764 mm (height × width), or 1818 mm × 812 mm (height × width).

  Referring to FIG. 8 or FIG. 9, the main door 5 is surrounded by a door frame 51f on three sides except the bottom surface. These door frames 51f are fixed to the fire wall W. One door frame 51f extending in the vertical direction and one side surface of the main door 5 are rotatably connected by a plurality of hinges 51b, whereby the single door type main door 5 can be obtained.

  Referring to FIGS. 9 to 11, the door frame 51 f is provided with a step 511 serving as a door stop. When the main door 5 comes into contact with the step 511, the room can be closed. By projecting the step 511 with respect to the gap d between the inner wall of the door frame 51f and the side surface of the main door 5, it is possible to prevent the flame generated in the room from entering the room. A buffer member 51d is attached to the step 511. The buffer member 51d alleviates the impact when the main door 5 is closed and hermetically seals the gap d. Further, a flat lower frame 52f on which the bottom surface of the main door 5 is slidable is attached to the floor surface FL (see FIG. 10 or FIG. 11).

  Referring to FIG. 8, the main door 5 has a door knob 52 arranged on the side opposite to the plurality of hinges 51b. By rotating the door knob 52, a latch bolt (not shown) connecting the main door 5 and the door frame 51f is released, and the main door 5 can be opened. When the main door 5 is closed, a latch bolt (not shown) is automatically restored so that the main door 5 cannot be easily opened by wind pressure or the like. It is preferable to use a door knob 52 having a locking function.

  Referring to FIG. 7, the main door 5 has a door closer 53 attached to the upper hinge 51b. The door closer 53 has a function of automatically closing the main door 5 that has been artificially opened. Further, the door closer 53 prevents the main door 5 from abruptly closing due to the action of the buffer oil and the damper mechanism filled in the main body, or the main door 5 from being suddenly opened by wind pressure or the like. Thus, it has the function to slow down the rotation speed of the main door 5.

  The main door 5 configured as described above is arranged in the opening of the room Rm, and when the fire occurs, the opening can be closed by the main door 5 to block the flame. And the expansion of the fire from the room can be prevented or the spread of fire from the outside can be prevented.

(Structure of child door)
Next, the structure of the child door will be described. 2 to 5, the child door 6 is formed into a bag shape having a hollow inside so as to have a predetermined thickness by bending and welding a steel plate. It is preferable to accommodate a heat insulating material in the child door 6. The child door 6 is normally disposed so as to block the rectangular opening 1 h formed at the center of the parent door 5.

  8 to 11, the main door 5 includes a first door contact portion 51s and a second door contact portion 52s. The first door contact portion 51s includes an upper frame 51u and a pair of vertical frames 51v and 51v. The upper frame 51u protrudes from the upper side of the opening 5h. The pair of vertical frames 51v and 51v protrude from both side surfaces of the opening 5h.

  From the state shown in FIG. 11, when the child door 6 is rotated clockwise (in the direction of arrow R) around the virtual rotation center Q, the upper frame member 61f fixed to the upper surface of the child door 6 contacts the upper frame 51u. When the vertical frame member 63f fixed to the side surface of the child door 6 comes into contact with the vertical frame 51v, the rotation of the child door 6 can be stopped (see FIG. 10). In the state illustrated in FIG. 10, the first door contact portion 51 s closes the gap between the inner wall of the opening 6 h and the upper half 6 sh of the child door 6.

  Referring to FIGS. 8 to 11, the second door contact portion 52s includes a lower frame 52d and a pair of vertical frames 52v and 52v. The lower frame 52d protrudes from the lower side of the opening 5h. The pair of vertical frames 52v and 52v protrude from both side surfaces of the opening 5h.

  From the state shown in FIG. 11, when the child door 6 is rotated clockwise (in the direction of the arrow R) around the virtual rotation center Q, the lower frame member 62f fixed to the lower surface of the child door 6 contacts the lower frame 52d. When the vertical frame member 23f fixed to the side surface of the child door 6 comes into contact with the vertical frame 52v, the rotation of the child door 6 can be stopped (see FIG. 10). In the state shown in FIG. 10, the second door contact portion 52s closes the gap between the inner wall of the opening 5h and the lower half 6ih of the child door 6.

  Referring to FIG. 8, the child door 6 has a door knob 62n disposed in the upper half 6sh. When holding the door knob 62n of the upper half 6sh and pulling the door knob 62n from the room side, the upper half 6sh opens from the outside to the room and the lower half 6ih opens from the room to the room. The door 6 can be rotated (see FIG. 11).

  Similarly, referring to FIG. 8, the child door 6 has a door knob 62n disposed in the lower half 6ih. When the door knob 62n of the lower half 6ih is grasped and the door knob 62n is pushed from the room side, the upper half 6sh opens from the outside to the room and the lower half 6ih opens from the room to the room. The door 6 can be rotated (see FIG. 11). A door knob 62n is also provided on the side opposite to the paper surface of FIG. 8, and the child door 6 can be rotated from the outdoor side by grasping the door knob 62n. The door knob 62n is not limited to the illustrated cylinder type, and may be a lever type.

  Referring to FIG. 8 or FIG. 10 and FIG. 11, the child door 6 has a pair of magnet catches 64 and 64 arranged at the top. As shown in FIG. 4, when the upper half 6sh of the child door 6 is in contact with the upper frame 51u, the pair of magnet catches 64 and 64 adsorb the upper frame 51u. The pair of magnet catches 64 and 64 can maintain the closed state of the child door 6 with respect to the parent door 5 against wind pressure and the like.

(Configuration of weight)
Next, the configuration of the weight will be described. Referring to FIG. 8 or FIG. 10 and FIG. 11, the child door 6 has a band plate-like weight 8 attached to the lower end portion thereof. The weight 8 may be divided and arranged in the horizontal direction. By attaching the weight 8 to the lower end portion of the child door 6, the child door 6 can be self-closed.

  As shown in FIG. 11, in the state where the lower half 6ih of the child door 6 is opened from the room to the outside, the weight of the upper half 6sh and the weight of the lower half 6ih are balanced if there is no weight 8. Therefore, the child door 6 can be easily rotated clockwise (arrow R direction) or counterclockwise (arrow L direction). Therefore, a weight 8 is provided at the lower end of the child door 6 so that the child door 6 is rotated in the clockwise direction so that the lower half 6ih of the child door 6 closes the opening 5h from the outside to the room. (See FIG. 10).

(Configuration of rotating shaft)
Next, the configuration of the rotating shaft will be described. FIG. 12 is a diagram illustrating a configuration of a rotary shaft provided in a rotary fireproof door according to the second embodiment. FIG. 12 (A) is a front view of the rotary shaft, and FIG. 12 (B) is FIG. ) Of FIG. 12A is a cross-sectional view taken along the line AA of FIG. 12A, FIG. 12C is a cross-sectional view taken along the line B-B of FIG. FIG.

  FIG. 13 is a perspective view showing a configuration of a rotating shaft provided in a rotary fireproof door according to the second embodiment, and is a state diagram in which a shaft portion provided on the child door side and a bearing portion provided on the parent door side are arranged to face each other. It is.

  FIG. 14 is a perspective view showing a configuration of a rotating shaft provided in a rotary fireproof door according to the second embodiment, and is a state diagram in which a shaft portion provided on the child door side and a bearing portion provided on the parent door side are arranged to face each other. It is.

  FIG. 15 is a diagram illustrating a configuration of a rotating shaft provided in a rotary fireproof door according to the second embodiment, and FIG. 15A illustrates a rotating shaft that is shown in a state where the child door is tilted at a right angle with respect to the parent door. 15B is a cross-sectional view taken along the line AA of FIG. 15A, FIG. 15C is a cross-sectional view taken along the line BB of FIG. 15A, and FIG. ) Is a cross-sectional view taken along the line CC in FIG.

  Referring to FIG. 8, the pair of rotary shafts 7 and 7 are arranged in line symmetry on the left and right sides of the child door 6, so that the configuration of the rotary shaft 7 will be described below as a representative of the right rotary shaft 7. .

  Referring to FIGS. 12 to 15, the rotating shaft 7 is constituted by a cylindrical bearing portion 71 and a columnar boss 72. The bearing portion 71 protrudes from the inner wall on the side surface of the opening 5 h provided in the main door 5. Further, the bearing portion 71 opens a circular bearing hole 71h that receives the boss 72 and is rotatably connected thereto.

  Referring to FIGS. 12 to 15, the boss 72 protrudes from one surface of the square columnar intermediate vertical frame member 70. The intermediate vertical frame member 70 is disposed at an intermediate portion of the vertical frame member 63 f disposed on the side surface of the child door 6. Further, the intermediate vertical frame member 70 is provided with a pair of female screw portions 70s and 70s. The intermediate vertical frame member 70 can be fixed to the side surface of the child door 6 by screwing into the female screw portion 70s from the inside of the child door 6 using the bolt member 70b (see FIG. 12D).

  Referring to FIG. 12B or FIG. 13 and FIG. 15B, the bearing portion 71 has an annular thick portion 71w continuous from the first tangential direction to the vertical frame 51v of the first door stop portion 51s. ing. The vertical frame 51v of the first door contact portion 51s is in contact with one surface of the intermediate vertical frame member 70 and the vertical frame member 63f, and the gap between the side surface of the upper half 6sh of the child door 6 and the inner wall of the opening 5h. Can be closed (see FIG. 8).

  Also, referring to FIG. 12B or FIG. 13 and FIG. 15B, the bearing portion 71 has an annular thick portion 31w from the second tangential direction to the vertical frame 52v of the second door stop portion 52s. It is continuous. The vertical frame 52v of the second door contact portion 52s is in contact with the other surface of the intermediate vertical frame member 70 and the vertical frame member 63f, and the gap between the side surface of the lower half 6ih of the child door 6 and the inner wall of the opening 5h. Can be closed (see FIG. 8).

  Thus, the bearing portion 71 is shielded by the first door contact portion 51s and the second door contact portion 52s so that there is no gap penetrating from one surface of the main door 5 toward the other surface.

  Referring to FIG. 12C or FIG. 14 and FIG. 15C, the intermediate vertical frame member 70 forms a pair of grooves 70d and 70d that are recessed from the outer periphery of the boss 72. The arc wall formed in the groove 70 d is continuous with the outer periphery of the boss 72. The pair of groove portions 70 d and 70 d can guide the outer periphery of the bearing portion 71.

  Referring to FIG. 12 (C) or FIG. 14 and FIG. 15 (C), the groove part 70d is constituted by an arc groove 71d and a deformed groove 72d. The arc groove 71d has a first bottom surface with which the tip surface of the bearing portion 71 abuts. The arc groove 71d has a partial arc wall that faces the arc wall of the groove 70d. The irregularly shaped groove 72d has a second bottom surface that is recessed by providing a step from the first bottom surface of the circular arc groove 71d. The deformed groove 72d has a flat wall 72w that faces the arc wall of the groove 70d and continues to the partial arc wall of the arc groove 71d (see FIG. 12C).

  Referring to FIG. 15B, the rotation angle of the child door 6 with respect to the main door 5 can be defined by the flat wall 72w formed in the deformed groove 72d coming into contact with the vertical frame 51v and the vertical frame 52v (FIG. 15B). 11).

  Also, referring to FIG. 12C or FIG. 14 and FIG. 15C, the pair of arc grooves 71d and 71d are bearings so that there is no gap penetrating from one surface of the child door 6 to the other surface. Blocked by the portion 71. Further, the pair of arc grooves 71d and 71d are detoured from one surface of the intermediate vertical frame member 70 to the other surface so that there is no gap penetrating from one surface of the child door 6 to the other surface. Yes.

(Operation of the rotary fire door)
Next, the operation and effect of the fire door 20 according to the second embodiment will be described. 8 to 15, the fire door 20 is provided with a boss 72 protruding from the side surface (thickness surface) of the child door 6. In addition, the fire door 20 is provided with a cylindrical bearing portion 71 rotatably connected to the boss 72 at an intermediate portion between the vertical frame 51v and the vertical frame 52v arranged in the vertical direction. Since the fire door 20 has the first door contact portion 51 s and the second door contact portion 52 s which can be in contact with one surface or the other surface of the child door 6 connected to the bearing portion 71, A gap penetrating from one surface to the other surface can be eliminated.

  Referring to FIG. 13, the vertical frame 51 v of the first door contact portion 51 s and the vertical frame 52 v of the second door contact portion 25 s slightly protrude with a step from the tip surface of the bearing portion 71. The vertical frame 51v and the vertical frame 52v are disconnected in the extending direction thereof. However, as shown in FIG. 12, the gap between the vertical frame 51 v and the vertical frame 52 v can be blocked by the boss 72 by inserting the boss 72 into the bearing portion 71. Thereby, the clearance gap penetrated from one side of child door 6 toward the other side can be eliminated.

  On the other hand, referring to FIG. 13, the vertical frame 51v and the vertical frame 52v are slightly protruded from the front end surface of the bearing portion 71 with a step, so that the child door 6 is rotated 90 degrees with respect to the main door 5. Then, it comes into contact with the protruding portions of the vertical frame 51v and the vertical frame 52v, and rotation becomes difficult. Therefore, a pair of irregularly shaped grooves 72d and 72d are provided (see FIG. 12C) to escape the protruding portions of the vertical frame 51v and the vertical frame 52v. Thus, the fire door 20 according to the second embodiment eliminates a gap penetrating from one surface of the child door 6 to the other surface by devising the shapes of the boss 72 and the bearing portion 71, and The door 6 was made rotatable.

  Referring to FIGS. 8 to 15, the fire door 20 according to the second embodiment can urgently escape from the lower portion of the opening 5 h by opening the child door 6 in the event of a disaster. 8 to 11, the fire door 20 is connected to the door closer 53 by a pair of rotary shafts 7 and 7 so that the child door 6 does not protrude in the thickness direction of the parent door 5. It can be removed and applied to sliding door fire doors.

  The fire door 20 according to the second embodiment can be replaced with an existing fire door and is expected to reduce the cost of remodeling work.

  The rotary fire door according to the present invention has disclosed the first embodiment including a vertical axis whose rotation center extends in the vertical direction and the second embodiment including a pair of horizontal axes whose rotation center extends in the horizontal direction. It can also be set as the rotation-type fire door which consists of a cover body which connected the opening part provided in the surface by a pair of horizontal axis so that opening and closing is possible.

  The rotary fire door according to the present invention has conventionally been difficult to eliminate a gap penetrating from the heating side to the non-heating side in the vicinity of the rotary shaft, but the shape of the rotary shaft and the bearing portion is devised. That solved the problem. It is expected that the application range of the rotary fire door according to the present invention will be expanded.

1 Fire door body (door body)
1Rh right half (one wing)
1Lh left half (the other wing)
2 Frame 3 Rotating shaft 10 Fire door (rotary fire door)
21s 1st door contact portion 22s 2nd door contact portion 30d / 30d A pair of groove portions 31 Bearing portion 31d Arc groove 31h Bearing hole 32d Deformed groove

Claims (5)

A door body having a cylindrical rotation shaft protruding from at least one thickness surface, and a frame body having an inner wall face facing the one thickness surface with a predetermined gap, with the rotation shaft as a center. The door body is a rotary fireproof door rotatably connected to the frame body,
The frame is
A cylindrical bearing portion that protrudes from the inner wall surface of the frame body and that has a bearing hole that receives the rotating shaft and is rotatably connected;
A first door that is in contact with one surface of the door body and can close a gap between one wing of the door body and the frame body, and is continuous to the bearing portion from a first tangential direction of the outer periphery of the bearing portion. Hitting part,
A second door which is in contact with the other surface of the door body and can close the gap between the other wing of the door body and the frame body, and is continuous to the bearing portion from the second tangential direction of the outer periphery of the bearing portion. A contact portion,
The door body forms a circular arc wall continuous on the outer periphery of the rotating shaft, and has a pair of grooves recessed from the thickness surface of the door body,
The groove is
An arc groove having a first bottom surface against which the front end surface of the bearing portion abuts, and having a partial arc wall facing the arc wall;
A deformed groove having a second bottom surface recessed from the first bottom surface of the arc groove and having a flat wall facing the arc wall and continuing to the partial arc wall;
The flat wall of the deformed groove is in contact with the outer wall of the first door contact portion or the outer wall of the second door contact portion to define the rotation angle of the door body with respect to the frame body,
The pair of circular arc grooves are closed by the bearing portion so that there is no gap penetrating from one surface of the door body to the other surface, and from one surface of the door body toward the other surface. A revolving fire door that bypasses. The rotation axis is composed of a vertical axis whose center of rotation extends in the vertical direction,
2. The rotary fire door according to claim 1, wherein the door body is a two-wing fire door body that can freely open and close an opening of a building. The rotation axis is composed of a pair of horizontal axes whose rotation centers extend in the horizontal direction,
2. The rotary fire door according to claim 1, wherein the door body includes a child door in which an opening provided in a main door which is a fire door is connected by a pair of the horizontal shafts so as to be freely opened and closed. The rotation axis is composed of a pair of horizontal axes whose rotation centers extend in the horizontal direction,
The rotary door according to claim 1, wherein the door body is formed of a lid body in which an opening provided on a floor surface is connected by a pair of the horizontal shafts so as to be opened and closed.   The rotary fire door according to claim 3, wherein the opening provided in the main door is opened to such an extent that a person can pass therethrough.

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