JP6360786B2 - Door - Google Patents

Description

  The present invention relates to a door provided with a metal communication frame that forms a communication opening that communicates indoors and outdoors.

  As a door provided with a metal communication frame that forms a communication opening that communicates with the inside and outside of the room, for example, a heat insulating door in which an inner frame for inputting mail or the like is attached in a through-hole that penetrates the inside and outside of the room. It is known (see, for example, Patent Document 1). This inner frame body is configured to include four members, an upper frame, a lower frame, and a left and right frame. The left and right end portions of the upper frame and the upper end portion of the left and right frames are abutted with each other. Are joined.

Japanese Patent No. 3623170

As in the case of the inner frame described above, when the ends of the left and right ends of the upper frame and the upper ends of the left and right frames are abutted and joined together, a gap is likely to occur between the upper frame and the left and right frames. .
Also, as a frame such as an inner frame body, in order to ensure rigidity, it is opposed by using a member that is bent so that both ends of the steel plate are substantially vertical and face each other so as to have a U-shaped cross section. For example, it is conceivable that the part is formed in a rectangular shape so that the part is positioned on the outer peripheral side and surrounds the communication opening. When the U-shaped member is bent into a rectangular shape, cuts are provided in the opposing positions of the opposing wall portions so as to reach the portion that becomes the bottom of the U-shape, and the rigidity is reduced only at the bent portion. For this reason, in the formed frame body, a gap due to the notch reaching the bottom portion remains. When a door equipped with such a frame is heated by a fire, flammable gas generated by, for example, melting of the adhesive in the heated door is discharged from the gap at the corner. There is a problem in that there is a risk of spilling out and igniting.
This invention is made | formed in view of this subject, The place made into the objective is to provide the door which a combustible gas does not leak easily even if it heats with a flame etc.

  To achieve this object, the door of the present invention is a steel plate outdoor surface provided with a metal communication frame that forms a communication opening that communicates indoors and outdoors, and an outdoor opening that faces the outdoors and is connected to the communication opening. And an indoor surface material made of a steel plate having an indoor opening facing the room and connected to the communication opening, wherein the communication frame is an upper frame disposed above the communication opening And a side frame portion disposed on the left and right of the communication opening, and the upper frame portion and the side frame portion are each a prospect plate portion along a prospect direction and a prospect direction of the prospect plate portion. An outdoor plate portion and an indoor plate portion that face each other along the in-plane direction of the door body at both ends, and the outdoor plate portion of the upper frame portion and the side frame portion is the outdoor surface material, The indoor plate parts of the upper frame part and the side frame part are respectively connected to the indoor surface material. The door is fixed, and a heating foam material is provided on an outer peripheral surface of a corner portion formed by the expectation plate portion of the upper frame portion and the expectation plate portion of the side frame portion. Is the body.

According to such a door body, the outdoor plate portion of the upper frame portion and the side frame portion is fixed to the outdoor surface material, and the indoor plate portion of the upper frame portion and the side frame portion are fixed to the indoor surface material, respectively. It is possible to provide a door body in which a gap is hardly generated even in a portion other than the corner portion formed by the expectation plate portion of the upper frame portion and the expectation plate portion of the side frame portion.
In addition, a heating foam material is provided on the outer peripheral surface of the corner formed by the expectation plate portion of the upper frame portion arranged above the communication opening and the expectation plate portions of the side frame portions arranged on the left and right of the communication opening. Therefore, even if a gap occurs at a corner where a gap is likely to occur in the communication frame, the gap can be closed with a foamed heating foam when the door is heated by a fire or the like. For this reason, even if combustible gas is generated in the door when heated, it can be prevented from leaking out of the door. Moreover, since the heating foam is provided on the outer peripheral surface of the prospecting plate portion, it is not exposed to the outside through the communication opening. For this reason, it is possible to provide the door body excellent also in the designability.

  In this door, the communication frame includes the outdoor plate portion of the upper frame portion, the outdoor plate portion of the side frame portion, the indoor plate portion of the upper frame portion, and the indoor plate of the side frame portion. A sheet metal frame member in which the upper frame part and the left and right side frame parts are connected by the flat prospect plate part having a notch part that separates the part is formed by bending the prospect plate part It is desirable to have a frame body.

  According to such a door body, the communication frame that forms the communication opening that communicates indoors and outdoors is a frame material in which the prospective plate portion of the upper frame portion and the prospective plate portions of the left and right side frame portions are connected flatly. Since the communication frame main body made of sheet metal is formed by bending the prospecting plate portion, the number of members constituting the communication frame and the number of manufacturing steps can be reduced, and it can be manufactured at low cost. In addition, when the sheet metal is bent and formed, a cut portion must be provided, and the frame member has a configuration in which the sheet metal is bent, and there is no indoor plate portion and outdoor plate portion at the corner. For this reason, when the door body is heated by a fire or the like, the gap between the corner portion and the surface material is foamed by providing the heating foam material at the corner portion where the indoor plate portion and the outdoor plate portion do not exist. It is possible to more reliably block with the heated foam material. For this reason, even if combustible gas is generated in the door when heated, it can be prevented from leaking out of the door.

In this door body, it is preferable that the heating foam material is formed in a sheet shape and provided on each of two outer peripheral surfaces forming the corner portion of the prospecting plate portion.
According to such a door body, since the sheet-like heating foam is provided on each of the two outer peripheral surfaces forming the corners of the prospecting plate portion, for example, one sheet straddling the two outer peripheral surfaces A gap is less likely to occur between the communication frame main body and the heating foam material than when the heating foam material is bent. For this reason, it is possible to block | close a notch part more reliably.

In the door body, the heating foam material provided on each of the outer peripheral surfaces of the heating foam material is arranged along an edge of the corner portion, and an edge of the heating foam material protrudes from the edge of the corner portion. It is desirable to be covered with the other heating foam material arranged.
According to such a door body, the heating foam material provided on each of the two outer peripheral surfaces is such that the edge of one heating foam material arranged along the edge of the corner portion protrudes from the edge of the corner portion. Since it is covered with the other heating foam material arranged, the gap is hardly generated between the heating foam materials provided on the two outer peripheral surfaces. For this reason, it is possible to block | close a notch part more reliably.

In this door body, it is desirable that a closing member for closing a space between the outdoor plate portion and the indoor plate portion is provided below the heating foam material provided in the side frame portion.
According to such a door body, since the closing member for closing the space between the outdoor plate portion and the indoor plate portion is provided below the heating foam material provided in the side frame portion, the heating foam material is heated even if heated. Even if the foam drops due to foaming, it is received by the closing member. For this reason, even if the heated foam material is foamed and dropped, the cut portion can be closed by the heated foam material remaining on the closing member.

The door frame is a metal peripheral frame that overlaps with a peripheral edge portion of the indoor opening provided in the indoor surface material and has a peripheral opening connected to the indoor opening, on the indoor side of the indoor surface material. It is desirable that the indoor surface material is sandwiched together with the communication frame.
According to such a door body, the metal peripheral frame that overlaps the peripheral part of the indoor opening provided in the indoor surface material is provided on the indoor side of the indoor surface material and sandwiches the indoor surface material together with the communication frame. Therefore, when the door is heated, it is possible to prevent a portion overlapping with the peripheral portion in the indoor opening from being deformed. For this reason, it is possible to prevent combustible gas from leaking out of the door body from the periphery of the indoor opening.

  ADVANTAGE OF THE INVENTION According to this invention, even if heated with a flame etc., it is possible to provide the door which a combustible gas cannot leak easily.

It is an external view which shows the entrance door which concerns on this embodiment. It is a disassembled perspective view which shows the structure of the peripheral part of a mailing mouth. It is a longitudinal cross-sectional view of an entrance door. It is a cross-sectional view of an entrance door. It is a perspective view for demonstrating a communication frame, a communication frame main body, and a lower frame member. It is the simplified perspective view which shows the manufacturing method of a communication frame main body.

Hereinafter, a door according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the door of the present embodiment is a front door 1 attached to a building, is rotatably attached to a frame 2 attached to a housing of the building, and posts mails and the like from outside the room. It has a loading port 3a through which an object can be placed and a receiving box 7 (FIG. 3) for accommodating the throwing item on the indoor side.

  In the following description, when the entrance door 1 is attached to a building or the like from the outside of the room, the vertical direction is the vertical direction, the horizontal direction is the horizontal direction, and the depth direction is the indoor / outdoor direction. Shown as prospective direction. Even if it is each part of the entrance door 1 or each member constituting the entrance door 1 is in a single state, it becomes the vertical direction, the left-right direction, and the prospective direction with the entrance door 1 attached. The direction is specified and described.

  As shown in FIG. 2 to FIG. 4, the front door 1 has an outdoor surface material 4 made of a steel plate facing the outside and an indoor surface material 5 made of a steel plate facing the room spaced apart from each other via a core (not shown). They face each other and are each bonded to a core material. The outdoor surface material 4 is provided with a rectangular outdoor opening 41, and covers the peripheral edges 41 a, 41 b, 41 c of the outdoor opening 41 from the outside of the room, and a cover frame 3 provided with a port 3 a smaller than the outdoor opening 41 is provided. It has been.

  The insertion port 3a is closed from the indoor side by a lid body 8 that is rotatable about an axis 8c extending in the left-right direction on the indoor side of the cover frame 3 above the insertion port 3a. The lid body 8 is formed larger than the posting port 3a, and has a closing portion 8a protruding so as to be flush with the outdoor side surface 3b of the cover frame 3 when entering the closing port 3a and closing. On the outer periphery of the closing portion 8a, there is an opposing edge portion 8b that faces the cover frame 3.

  The lid body 8 is urged to the outdoor side by the torsion spring 6 engaged with the shaft 8c so that the opposing edge portion 8b is brought into contact with the cover frame 3. The lid 8 has a lower edge located above the lower edge 41a of the outdoor opening 41 in a state where the posting port 3a is closed. When a thrown object is thrown, the lid 8 is pushed indoors against the urging force of the torsion spring 6 so that the lid 8 is turned indoors about the shaft 8c to open the throwing port 3a. Is opened.

  The indoor surface material 5 is provided with a rectangular indoor opening 51 that has the same width at the same height as the outdoor opening 41 and is formed wider below the outdoor opening 41. That is, the lower edge 51 a of the indoor opening 51 is provided at a position lower than the lower edge 41 a of the outdoor opening 41. A stainless steel post guide 9 as a peripheral frame having a peripheral opening 9a substantially the same as the indoor opening 51 and having a plate shape is attached to the indoor surface material 5 from the indoor side.

  Between the outdoor surface material 4 and the indoor surface material 5, there is provided a communication frame 60 that is formed of a steel plate by forming a communication opening S that communicates indoors and outdoors. The communication frame 60 includes an upper frame portion 61 disposed along the upper edges 41b and 51b of the outdoor opening 41 and the indoor opening 51, and left and right side frame portions 62 disposed along the left and right side edges 41c and 51c. A communication frame main body 63 that surrounds the outdoor opening 41 and the indoor opening 51 from three sides, and a lower frame member 64 that is fixed between the lower end portions of the left and right side frame portions 62.

  As shown in FIG. 5, the communication frame main body 63 includes the upper frame portion 61 and the side frame portion 62 at the opposite ends of the prospective plate portions 611 and 621 along the prospective direction and the prospective plate portions 611 and 621 in the prospective direction. It has the outdoor board parts 612 and 622 and the indoor board parts 613 and 623 which are along the in-plane direction of the entrance door 1 and mutually oppose. The outdoor plate portions 612 and 622 are portions that are in contact with the inner surface of the outdoor surface material 4 so as to surround three sides of the outdoor opening 41 formed in the outdoor surface material 4, and the indoor plate portions 613 and 623 are the indoor surfaces. This is a portion that comes into contact with the inner surface of the indoor surface material 5 so as to surround three sides of the indoor opening 51 formed in the material 5.

  As shown in FIG. 6, the communication frame main body 63 is formed by press working that cuts and folds a steel plate 600 as a sheet metal into a predetermined shape. Specifically, one side 600a corresponding to the combined length of the upper frame portion 61 and the height of the left and right side frame portions 62, the width of the prospective plate portions 611 and 621 in the expected direction, and the outdoor plate portion 612. 622 and the indoor plate portions 613 and 623 are formed of a rectangular steel plate 600 having one side 600b corresponding to the combined length of the finding widths.

  The rectangular steel plate 600 is first formed with a plurality of holes 613a, 622b, 623b for screwing or the like, and recesses 622a, 623a with which a lower frame member 64 described later is brought into contact, and an upper frame portion. A cut portion 63a is formed in a direction orthogonal to the longitudinal direction from both ends along the longitudinal direction at a position serving as a boundary between 61 and the side frame portion 62. The notch 63 a slightly extends beyond the boundary between the prospective plate portions 611 and 621 and the outdoor plate portions 612 and 622 or the indoor plate portions 613 and 623 to reach the prospective plate portions 611 and 621. It forms up to the position where it penetrates slightly. In FIG. 6, illustration of holes and recesses formed in the communication frame main body 63 is omitted.

Next, the frame member 601 is bent at the boundary between the prospective plate portions 611 and 621 and the outdoor plate portions 612 and 622 and at the boundary between the prospective plate portions 611 and 621 and the indoor plate portions 613 and 623, so that the cross section becomes a U shape. Form.
Next, the boundary between the upper frame portion 61 and the side frame portion 62, that is, the cut portion 63a formed from the outdoor plate portions 612 and 622 and the cut portion 63a formed from the indoor plate portions 613 and 623 are opposed to each other. Then, in the portion 63c where only the prospecting plate portions 611 and 621 are connected, the portion corresponding to the side frame portion 62 is substantially perpendicular to the side opposite to the outdoor plate portions 612 and 622 and the indoor plate portions 613 and 623. Bend like so. Thereby, the communication frame main body 63 in which the upper frame portion 61 and the side frame portion 62 are integrated is formed from one steel plate 600.

  A recessed portion 622a that is recessed toward the indoor side is provided at the lower part of the outdoor plate portion 622 of the side frame portion 62 of the formed communication frame main body 63, and at the lower end of the indoor plate portion 623 of the side frame portion 62, A recessed portion 623a that is recessed to the outdoor side is provided. Further, through holes 622b and 623b for attaching the cover frame 3 are provided in the upper part of the outdoor plate portion 622 and the indoor plate portion 623 of the side frame portion 62, and the indoor plate portion 613 of the upper frame portion 61 is provided in the indoor plate portion 613 of the upper frame portion 61. A burring hole 613a for fixing the post guide 9 provided on the indoor side of the indoor surface material 5 is provided.

  The outer peripheral surface 611a on the opposite side of the communication opening S in the corner portion 63b of the bent plate portions 611 and 621 of the communication frame main body 63, that is, on the end portion side of the plate portions 611 and 621 forming the corner portion 63b. , 621a is provided with thermally expandable graphite 65 as a heating foam material. The heat-expandable graphite 65 has a sheet shape and is provided at both ends of the expectation plate portion 611 of the upper frame portion 61 and the upper end of the expectation plate portion 621 of the side frame portion 62. At this time, all of the heat-expandable graphite 65 is wider than the width W1 in the left-right direction of the notch portions formed in the prospective plate portions 611 and 621 by at least the notch portion 63a and at least in the prospective plate portions 611 and 621. It is provided wider than the width W2 in the prospective direction between the leading notches 63a. In the present embodiment, the heat-expandable graphite 65 is sufficiently wider than the width W1 in the left-right direction of the notch portions formed in the prospecting plate portions 611 and 621 by the notch portion 63a, and the outdoor plate portions 612 and 622 and the indoor space. It is provided over almost the entire area between the plate portions 613 and 623, that is, from the end of the prospective plate portions 611 and 621 on the outdoor plate portion 622 side to the end on the indoor plate portion 623 side.

  The thermally expandable graphite 65 provided at the upper end of the prospective plate portion 621 of the left side frame portion 62 that forms the left corner portion 63b is pasted along the upper edge of the prospective plate portion 621 of the side frame portion 62. The thermally expandable graphite 65 provided at the left end of the prospective plate portion 611 of the upper frame portion 61 is pasted so as to slightly protrude from the left edge of the prospective plate portion 611 of the upper frame portion 61. It is arranged so as to cover the upper edge of the thermally expandable graphite 65 provided on the upper edge of the prospective plate portion 621.

  The thermally expandable graphite 65 provided at the upper end of the expectation plate portion 621 of the right side frame portion 62 that forms the right corner portion 63 b is attached along the upper edge of the expectation plate portion 621 of the side frame portion 62. The thermally expandable graphite 65 provided at the right end of the prospective plate portion 611 of the upper frame portion 61 is pasted so as to slightly protrude from the right edge of the prospective plate portion 611 of the upper frame portion 61. The thermal expansion graphite 65 provided at the upper end of the prospective plate portion 621 is disposed so as to cover the upper edge.

  The left and right side frame portions 62 of the communication frame main body 63 close the space between the outdoor plate portion 622 and the indoor plate portion 623 below the thermally expandable graphite 65 provided at the upper end, and are heated and expanded. A receiving member 66 is provided as a closing member for receiving the expandable graphite 65 when it falls. The receiving member 66 is formed by bending a steel plate having substantially the same width as the interval between the outdoor plate portion 622 and the indoor plate portion 623 into an L shape, and one plate portion 66 a forming an L shape is connected to the outdoor plate portion 622. The other plate portion 66 b is fixed to the prospective plate portion 621 of the side frame portion 62 so as to form a substantially horizontal surface with the indoor plate portion 623.

  The lower frame member 64 includes an inclined portion 64 a that has substantially the same inclination as the inclination connecting the lower edge 41 a of the outdoor opening 41 and the lower edge 51 a of the indoor opening 51 between the outdoor surface material 4 and the indoor surface material 5. The indoor facing wall portion 64b that is suspended from the lower edge of the inclined portion 64a and faces the indoor surface material 5, and the outdoor facing wall portion that is suspended from the outdoor edge of the inclined portion 64a and faces the outdoor surface material 4 64c. The width of the inclined portion 64a in the left-right direction is substantially the same as the interval between the prospecting plate portions 621 of the left and right side frame portions 62, and the indoor facing wall portion 64b and the outdoor facing wall portion 64c are more lateral than the inclined portion 64a. An outdoor extension piece 64d and an indoor extension piece 64e are provided respectively. The indoor facing wall 64b is provided with a burring hole (not shown) for fixing the post guide 9 provided on the indoor side of the indoor surface material 5.

  When the lower frame member 64 is attached to the communication frame main body 63, the outdoor extension piece 64d is disposed outside the concave portion 622a provided in the outdoor plate portion 622 of the communication frame main body 63, and the indoor extension piece 64e is provided. A communication frame 60 is formed by being spot-welded on the indoor side of a recess 623 a provided in the indoor plate portion 623 of the communication frame main body 63.

  The lower frame member 64 has an outdoor extension piece 64d disposed in a recess 622a provided in the outdoor plate portion 622, and the outdoor facing wall portion 64c and the outdoor extension piece 64d form the same surface as the outdoor plate portion 622. The extending piece 64e is disposed in a recess 623a provided in the indoor plate portion 623, and the indoor facing wall portion 64b and the indoor extending piece 64e form the same surface as the indoor plate portion 623. For this reason, the communication frame 60 has the outdoor plate portions 622 and 622, the outdoor facing wall portion 64c and the outdoor extension piece 64d fixed to the inner surface of the outdoor surface material 4 by adhesion, screwing, or the like, and the indoor plate portions 613 and 623, The indoor facing wall portion 64b and the indoor extension piece 64e are fixedly attached to the inner surface of the indoor surface material 5 by adhesion, screwing, or the like.

  The post guide 9 is disposed on the indoor side of the indoor surface material 5 so as to overlap the peripheral edge portion 5a of the indoor opening 51, and is screwed to the indoor plate portions 613 and 623 and the indoor extending piece 64e. That is, a portion of the indoor surface material 5 that overlaps the post guide 9 that becomes the peripheral edge 5 a of the indoor opening 51 is sandwiched between the communication frame 60 and the post guide 9.

  According to the entrance door 1 of the present embodiment, the outdoor plate portions 612 and 622 of the upper frame portion 61 and the side frame portion 62 are fixed to the outdoor surface material 4, and the indoor plate portions 613 of the upper frame portion 61 and the side frame portion 62. , 623 are fixed to the interior surface material 5, a gap is also generated in a portion other than the corner portion 63 b formed by the prospective plate portion 611 of the upper frame portion 61 and the prospective plate portion 621 of the side frame portion 62. It is possible to provide a difficult entrance door 1.

  Moreover, the outer peripheral surface of the corner | angular part 63b formed by the prospective board part 611 of the upper frame part 61 arrange | positioned above the communication opening S, and the prospective board part 621 of the side frame part 62 arrange | positioned at the right and left of the communication opening S Since the thermally expandable graphite 65 is provided in 611a and 621a, even when a gap is generated in the corner 63b where a gap is likely to be generated in the communication frame 60, when the entrance door 1 is heated by a fire or the like, It is possible to close the gap with the expanded thermally expandable graphite 65. For this reason, even if combustible gas is generated in the entrance door 1 when heated, it can be prevented from leaking out of the entrance door 1. Further, since the heat-expandable graphite 65 is provided on the outer peripheral surfaces 611a and 621a of the prospecting plate portions 611 and 621, it is not exposed to the outside through the communication opening S or the like. For this reason, it is possible to provide the entrance door 1 excellent also in the design property.

  In addition, the communication frame 60 that forms the communication opening S that communicates indoors and outdoors has a frame member 601 in which the prospective plate portion 611 of the upper frame portion 61 and the prospective plate portion 621 of the left and right side frame portions 62 are connected flatly. Since the communication frame main body 63 made of sheet metal is formed by bending the prospecting plate portions 611 and 621, the number of members constituting the communication frame 60 and the number of manufacturing steps can be reduced and the manufacturing can be performed at low cost. It is.

  In addition, when the sheet metal is bent and formed, the cut portion 63a must be provided, and the frame member 601 is formed by the outdoor plate portion 612 of the upper frame portion 61, the outdoor plate portion 622 of the side frame portion 62, and the upper frame portion 61. Since the indoor plate portion 613 and the indoor plate portion 623 of the side frame portion 62 are separated by the cut portion 63a, when the frame member 601 is bent at the cut plate portions 621 and 622, the corner portion 63b has an outdoor plate. The parts 612 and 622 and the indoor plate parts 613 and 623 do not exist. For this reason, when the door 63 is heated by a fire or the like by providing the thermally expandable graphite 65 in the corner 63b where the outdoor plates 612 and 622 and the indoor plates 613 and 623 are not present, the corner 63b. It is possible to more reliably close the gap between the outer surface material 4 and the indoor surface material 5 with the foamed thermally expandable graphite 65. For this reason, even if combustible gas is generated in the entrance door 1 when heated, it can be prevented from leaking out of the entrance door 1, even if the pressing force of the heated torsion spring 6 is increased. Even if the lid 8 is weakened and the flame opens and the flame enters the receiving box 7, there is no risk of ignition.

  Further, since the sheet-like thermally expandable graphite 65 is provided on each of the two outer peripheral surfaces 611a and 621a forming the corner portion 63b of the prospective plate portions 611 and 621, for example, straddling the two outer peripheral surfaces. A gap is less likely to be generated between the communication frame main body 63 and the heating foam material than when the heating foam material such as the thermally expandable graphite 65 is provided by bending. In particular, when the heat-foaming material has low toughness and is brittle, it is difficult to bend. Therefore, when the sheet-like thermally expandable graphite 65 is provided on each of the outer peripheral surfaces 611a and 621a, the thermally expandable graphite 65 is connected to the communication frame main body 63. It is possible to close the cut portion 63a more securely by close contact.

  In addition, the thermally expandable graphite 65 provided on each of the two outer peripheral surfaces 611a and 621a of each corner portion 63b is a portion of the thermally expandable graphite 65 disposed along the upper edge of the prospective plate portion 621 of the side frame portion 62. Since the upper end edge is covered with the thermal expansive graphite 65 provided on the prospective plate portion 611 of the upper frame portion 61 that is disposed so as to protrude from the left and right edges of the corner portion 63b, the two outer peripheral surfaces 611a and 621a are covered. It is difficult for a gap to be formed between the thermally expandable graphite 65 provided on the surface. For this reason, it is possible to more reliably close the cut portion 63a with the expanded thermally expandable graphite 65. Further, as described above, the upper frame portion 61 and the left and right side frame portions 62 are not integrally formed, and the separately formed upper frame member and the left and right side frame members are connected to each other at their end portions. Even if they are joined together, heating foam materials are provided on the outer peripheral surfaces of the upper frame material and the side frame material, respectively, and one heating foam material is provided so as to cover the edge of the other heating foam material. Then, even if heated by a flame or the like, it is possible to prevent the combustible gas from leaking from between the upper frame material and the side frame material.

  In addition, a receiving member 66 that closes the space between the outdoor plate portions 612 and 622 and the indoor plate portions 613 and 623 is provided below the thermally expandable graphite 65 provided in the prospective plate portion 621 of the side frame portion 62. Even if the heated thermally expandable graphite 65 foams and falls, it is received by the receiving member 66. For this reason, even if the thermally expandable graphite 65 is foamed and dropped, the notched portion 63a can be blocked by the expanded thermally expandable graphite 65 remaining on the receiving member 66.

  Further, the metal post guide 9 that overlaps the peripheral edge 5 a of the indoor opening 51 provided in the indoor surface material 5 is provided on the indoor side of the indoor surface material 5 and sandwiches the indoor surface material 5 together with the communication frame 60. Therefore, when the entrance door 1 is heated, it is possible to prevent the portion of the indoor opening 51 that overlaps the post guide 9 from being deformed. For this reason, it is possible to prevent combustible gas from leaking out of the entrance door 1 from the periphery of the indoor opening 51.

  In the above embodiment, an example in which the sheet-like thermally expandable graphite 65 is attached to the corner 63b and the two outer peripheral surfaces 611a and 621a forming the corner 63b has been described. For example, you may affix so that it may straddle a side frame part from an upper frame part.

  Moreover, in the said embodiment, the upper end edge of the thermally expansible graphite 65 arrange | positioned along the upper edge of the prospective board part 621 of the side frame part 62 is protruded and arrange | positioned from the right and left edges of the corner | angular part 63b. Although the example covered with the thermally expansible graphite 65 provided in the prospective plate part 611 of the upper frame part 61 was demonstrated, the side of the thermally expansible graphite arrange | positioned along the right and left edges of the prospective plate part of the upper frame part The end edge may be covered with thermally expansible graphite provided on the prospecting plate portion of the side frame portion arranged so as to protrude upward. In addition, the edges of the thermally expandable graphite provided in the upper frame part and the side frame part are not covered by the other and are adjacent to each other, and are arranged with a slight gap. Alternatively, any configuration may be used as long as the cut portion is covered with the foamed heated foam material.

  Moreover, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

1 entrance door, 3a loading port, 4 outdoor surface material, 5 indoor surface material, 5a peripheral edge,
9 post guide, 9a peripheral opening, 51 indoor opening, 60 communication frame, 61 upper frame part,
62 side frame part, 63 communication frame body, 63a notch part, 63b corner part,
65 thermally expandable graphite, 66 receiving member, 600 steel plate, 601 frame material,
611 prospecting plate portion, 611a outer peripheral surface, 612 outdoor plate portion, 613 indoor plate portion,
621 prospecting plate portion, 621a outer peripheral surface, 622 outdoor plate portion, 623 indoor plate portion,
S communication opening,

Claims (6)

A metal communication frame that forms a communication opening that communicates indoors and outdoors;
An outdoor surface material made of a steel plate that has an outdoor opening that faces the outdoor and connects to the communication opening,
An indoor surface material made of a steel plate having an indoor opening facing the room and connected to the communication opening,
A door body with
The communication frame has an upper frame portion disposed above the communication opening, and side frame portions disposed on the left and right of the communication opening,
Each of the upper frame part and the side frame part includes a prospecting plate part along the prospective direction, and an outdoor plate part and an indoor board that face each other along the in-plane direction of the door body at both ends in the prospective direction of the prospective plate part. And
Have
The outdoor plate portions of the upper frame portion and the side frame portion are fixed to the outdoor surface material, and the indoor plate portions of the upper frame portion and the side frame portion are fixed to the indoor surface material, respectively.
A door body, wherein a heating foam material is provided on an outer peripheral surface of a corner portion formed by the expectation plate portion of the upper frame portion and the expectation plate portion of the side frame portion. The door body according to claim 1,
The communication frame includes a cut portion that separates the outdoor plate portion of the upper frame portion, the outdoor plate portion of the side frame portion, the indoor plate portion of the upper frame portion, and the indoor plate portion of the side frame portion. A sheet metal frame member in which the upper frame portion and the left and right side frame portions are connected by the flat expectation plate portion is provided with a communication frame body formed by bending the expectation plate portion. A door body characterized by that. The door body according to claim 1 or 2,
The heating foam material has a sheet shape,
A door body provided on each of the outer peripheral surfaces forming the corner portion of the prospect plate portion. The door body according to claim 3,
The heating foam material provided on each of the outer peripheral surfaces is arranged in such a manner that the edge of one heating foam material arranged along the edge of the corner portion projects from the edge of the corner portion. A door body covered with the heating foam material. The door body according to any one of claims 1 to 4,
A door body, wherein a closing member for closing a space between the outdoor plate portion and the indoor plate portion is provided below the heating foam material provided in the side frame portion. The door body according to any one of claims 1 to 5,
A metal peripheral frame that overlaps with a peripheral edge portion of the indoor opening provided in the indoor surface material and has a peripheral opening connected to the indoor opening is provided on the indoor side of the indoor surface material together with the communication frame. A door body characterized by sandwiching the indoor surface material.

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