JP6186153B2 - Fire prevention door gap prevention structure - Google Patents

Description

  In order to prevent the spread or expansion of a fire, the present invention provides a fire door, particularly a hinged door fire door (hereinafter also referred to as a fire door) installed in an opening such as a passage provided in a fire wall of an outer wall or an internal fire prevention area. In general, the gap that occurs when the fire door is closed (closed) into the opening frame (a gap including the fitting tolerance) is effectively sealed by fitting or overlapping structures between the uneven surfaces. It belongs to the technical field of a gap prevention structure for realizing the state.

With respect to a fire door for the purpose of preventing the spread of fire or the spread or propagation of smoke, naturally, the accuracy of a closed or closed structure that prevents the occurrence of a gap through which flame or smoke leaks as much as possible is required. In particular, in the case of a hinged door type fire door, a closing structure that permits opening and closing operations and further prevents the generation of a gap during closing is required.
In that respect, the following patent document 1 as a prior art is a fire prevention door gap prevention technology using a fireproof foaming agent, and the mounting member inserted into the mounting groove formed at the edge of the door is a heated foam material. A gap preventing structure is disclosed that includes a base portion having a concave portion that accommodates and a fin portion extending outward from the base portion.
Also, in Patent Document 2 below, a door butt member is attached to the door butt of the fire door, a gap is left on the surface of the fire door, the polymerization piece is extended to the door end side, and the vertical rail provided on the opening side is also provided. A gap prevention structure is disclosed in which a polymer piece is formed and the two polymer pieces are positioned and closed when the fire door is closed.
Further, in Patent Document 3 below, in an openable / closable fireproof door composed of a door frame having a door stop at the opening and a door stop (slider), a heating expansion material is provided on the four peripheral edges of the door body. There is disclosed a gap prevention technique in which a fireproof packing is provided on the huller.

JP 2007-162271 A Japanese Patent Laid-Open No. 10-99463 Japanese Utility Model Publication No. 5-51365

As mentioned above, regarding the fire door gap prevention technology, which is a facility that prevents the spread of fire or the spread and propagation of smoke, in addition to the technology that uses a fireproof foaming agent, polymer pieces are placed on the door butt and opening side of the fire door. When the fire door is closed, the gap is closed by two overlapping pieces, or in the gap prevention structure consisting of a door frame with a door stop at the opening and the door stop, the four peripheral edges of the door body There have been proposed a gap prevention technique in which a heat expansion material is provided on the pallet and a fireproof packing is provided on the huller. Each can be said to be a unique proposal, but it is still not satisfactory.
This is because the gap prevention structure of the above-mentioned Patent Document 1 is made of a special and expensive material even though the configuration that achieves the purpose of eliminating or closing the gap generated between the fire door frame and the opening frame can be evaluated. Fire doors become expensive because they are used.
The gap prevention structure of Patent Document 2 has a problem that smoke resistance cannot be expected because two polymer pieces are not in contact with each other.
Furthermore, since the gap prevention technology of Patent Document 3 is configured to provide the heat expansion material on the four peripheral edges of the door body and provide the fireproof packing on the huller, the fire door is also expensive. In addition, the heat-expandable material has a property of expanding only when heated by a flame, and does not expand due to smoke generated prior to the flame, and there is a problem that a smoke-proof effect cannot be expected.

The object of the present invention is to make the gap formed between the fire door and the opening frame as close as possible to each other by the so-called concavo-convex surface fitting or overlapping structure, especially when the hinged door type fire door is closed to the opening frame. It is intended to provide a gap prevention structure having a structure that can be subdivided to obtain a high blocking effect and sufficiently expect both a smoke prevention effect and a flame prevention effect at the time of a fire.
More specifically, a thin steel plate (hereinafter referred to as an embossed steel plate) in which small and low (or shallow) irregularities are uniformly formed on both surfaces where the fire door and the opening frame face each other when the fire door is closed. When the fire door is closed into the opening frame, the gap generated between the surfaces facing each other is subdivided by the structure in which the irregularities of the thin steel plates fit or overlap each other. An object of the present invention is to provide a gap prevention structure that realizes a more advanced closed state.
A different object of the present invention is that both sides where the fire door and the opening frame face each other at the time of closing are continuous in one direction by alternately repeating small and low ridges and grooves, which are as small as the unevenness of the embossed steel plate. When the fire door is closed when the fire door is closed into the opening frame, a gap generated between the surfaces facing each other is formed by a corrugated thin steel plate (hereinafter referred to as a corrugated steel plate). It is an object of the present invention to provide a gap prevention structure that realizes a more advanced closed state by subdividing the groove and the ridges of the corrugated steel sheet into a structure in which the grooves and protrusions are fitted or overlap each other.

As a means for solving the problems of the prior art, a gap prevention structure for a fire door according to the invention described in claim 1 is:
When the fire door 2 is closed into the opening frame 4 and closed, the gap generated between the surfaces facing each other is closed, so that at least the surface facing the fire door 2 in the opening frame 4 and the fire door 2 And at least both of the surfaces facing the opening frame 4 are formed with a plurality of small and low convex portions 10a in a uniform arrangement on the entire surface, and valleys between adjacent convex portions 10a and 10a are formed on the convex portions. Consists of an embossed steel plate 10 formed in a recess 10b having the same shape and size as 10a,
In the closed state in which the fire door 2 is confined in the opening frame 4, the convex portions 10a and the concave portions 10b of the embossed steel plates 10 facing each other are fitted or overlapped with each other.

The clearance prevention structure for the fire door according to the invention described in claim 2 is:
When the fire door 2 is closed into the opening frame 4 and closed, the gap generated between the surfaces facing each other is closed, so that at least the surface facing the fire door 2 in the opening frame 4 and the fire door 2 In this example, at least both of the surfaces facing the opening frame 4 are formed with a plurality of small and low protrusions 11a in a uniform arrangement on the entire surface, and the back surface of the protrusions 11a is almost the same as the protrusions 11a. Consists of embossed steel plate 11 formed in shallow recess 11b of the same shape and size,
In the closed state in which the fire door 2 is confined in the opening frame 4, the convex portions 11a and the concave portions 11b of the embossed steel plates 11 facing each other are fitted or overlapped with each other.

The invention described in claim 3 is the gap prevention structure for a fire door described in claim 1 or 2,
Arrangement of a plurality of small and low convex portions 10a of the embossed steel plate 10, and arrangement of concave portions 10b that are valleys between adjacent convex portions 10a and 10a, or arrangement of small and low convex portions 11a of the embossed steel plate 11, and the convex portions The arrangement of the recesses 11b formed on the back surface of 11a is a checkered pattern arrangement.

An embossed steel plate 10 in which a plurality of convex portions 10a are formed (raised) in a uniform arrangement on the entire surface, and valley portions between the convex portions 10a and 10a are formed in concave portions 10b having substantially the same shape and the same size as the convex portions. Or the embossed steel plate 11 in which the plurality of convex portions 11a are formed in a uniform arrangement on the entire surface and the back portion of the convex portion 11a is formed in the same shape and the same size in the concave portion 11b, or the small and low convex stripes 12a and the concave grooves 12b Since each of the corrugated steel sheets 12 formed into a corrugated shape having the same shape and the same alternating shape is bent at the time of forming, depending on the degree of processing, the rigidity and bending strength of the steel sheet and Strength is increased. Therefore, as compared with the case where a simple flat steel plate is used, a steel plate having a thin plate thickness can be used. Therefore, each of the above-described forming processes becomes easier as the plate thickness is reduced, and the weight and cost of the steel plate can be reduced, and the fire door can be strengthened.
In the closed state in which the fire door 2 is confined in the opening surface of the opening frame 4, a gap (a gap including a fitting tolerance) generated between the surfaces facing each other is formed in both the embossed steel plates 10 or 11. The formed short convex portion 10a and the concave portion 10b (or the convex portion 11a and the concave portion 11b) are fitted or overlapped with each other, or both are formed on the corrugated steel sheet 12 and the short convex shape 12a is shallow. By the configuration in which the concave grooves 12b fit or overlap each other, as a result of filling the gap at the time of closing and making surface contact, the gap is subdivided, and the sealing effect of the gap is enhanced. Therefore, a gap prevention structure with high blocking performance can be realized, and the effect of preventing the flame and smoke from leaking during a fire and preventing the spread of fire is great.
In addition, the gap prevention structure of the present invention confines the embossed steel plate 10 or 11 or the corrugated steel plate 12 at least the surface where the fire door 2 and the opening frame 4 face each other, that is, the fire door 2 is confined in the opening frame 4. It can be easily implemented regardless of whether the fire door 2 and the opening frame 4 are attached to both sides of the surface where the fire door 2 and the opening frame 4 face each other, regardless of whether it is newly installed or existing fire prevention equipment. Because of its wide application range.
Furthermore, since the embossed steel plate 10 or 11 or the corrugated steel plate 12 is increased in rigidity and strength against the action of bending or twisting by the amount of forming as described above, the embossed steel plate 10 or 11 or As a result of using the corrugated steel sheet 12, an effect of increasing the strength and rigidity of the fire door 2 and the opening frame 4 is also obtained.

It is the horizontal sectional view which showed the structural example of the hinged door type | mold fire door which implements this invention. It is sectional drawing of the II-II line arrow instruct | indicated in FIG. A is a perspective view showing a part of an embossed steel plate in which convex portions are raised in a checkered pattern on one side of the steel plate, and B is a cross-sectional view taken along the line bb indicated in FIG. A is a perspective view showing a part of an embossed steel plate in which convex portions are raised in a checkered pattern on both the front and back surfaces of the steel plate, and the back portion of the convex portion is formed in a concave portion, and B is the b− indicated in FIG. It is sectional drawing of b line arrow. FIGS. 5A and 5B are sectional views conceptually showing main parts of different embodiments of the fire door clearance prevention structure using the embossed steel plate illustrated in FIG. 3 or FIG. 4, and FIG. 5C further shows a smoke prevention fin. The Example of the structure which improved the smoke-proof effect by using together is shown. It is the perspective view which showed a part of corrugated steel plate in which the protruding item | line parallel to one direction and a ditch | groove repeat alternately. A is a cross-sectional view conceptually showing an embodiment of a gap prevention structure for a fire door using the corrugated steel plate shown in FIG. 6 above, and B is a heat resistant and elastic sheet used in the gap portion. It is an Example of the structure which improved smoke prevention performance more.

The gap prevention structure for a fire door according to the present invention provides an opening frame as a means for more effectively closing a gap generated between the surfaces of the fire doors 2 when the fire door 2 is confined in the opening frame 4 and closed. 4, at least the surface facing the fire door 2 and the surface facing the opening frame 4 in the fire door 2 are raised with a plurality of small and low protrusions 10a in a uniform arrangement on one side of the steel plate, The embossed steel plate 10 formed in the concave portion 10b having the same shape and the same size as the valley portion between the adjacent convex portions 10a and 10a, or small and low convex portions 11a are raised on both the front and back surfaces of the steel plate in a uniform arrangement, and the convex portion 11a Is formed of an embossed steel plate 11 formed in the recess 11b.
Therefore, when the fire door 2 is closed into the opening frame 4, the fire door 2 and the opening frame 4 are closely fitted with or overlapped with the uneven portions that are opposed to each other, so that a gap including a fitting tolerance is closely closed. The structure is highly effective for blocking.
As the precondition, a plurality of small and low convex portions 10a raised on one side of the embossed steel plate 10 and the arrangement of the concave portions 10b between the adjacent convex portions 10a and 10a, or the both sides of the embossed steel plate 11 are raised. It is preferable that the arrangement of the plurality of small and low convex portions 11a and the concave portions 11b formed on the back surface of the convex portions 11a is arranged in a checkered pattern suitable for a structure that fits or overlaps each other.

The gap prevention structure for a fire door according to the present invention also provides an opening frame as a means for effectively closing a gap generated between the surfaces facing each other when the fire door 2 is closed in the opening frame 4 and closed. 4, at least the surface facing the fire door 2 and the surface facing the opening frame 4 of the fire door 2 are configured so that the small and low ridges 12 a and the groove 12 b are almost the same shape and the same size. It is formed by the corrugated steel sheet 12 having a corrugated shape that is alternately continuous in the direction.
In addition, the corrugated steel plate 12 is arranged such that when the fire door 2 is confined in the opening frame 4, the corrugated steel plate 12 is placed in a direction perpendicular to the direction X of the overlap margin (insertion allowance) between the opening frame 4 and the fire door 2. The streaks of the ridges 12a and the grooves 12b of the shaped steel plate 12 are arranged. With this configuration, when the fire door 2 is fitted into the opening frame 4 and closed, both the groove 12b and the protrusion 12a are fitted or overlap each other, thereby effectively closing the gap.
In addition, the height of the convex portions 10a and 11a or the ridge 12a described above is an operation for confining the fire door 2 in the opening frame 4 and closing it on the premise of the fitting tolerance between the fire door 2 and the opening frame 4. The size is not limited.

Next, the present invention will be described based on the illustrated embodiment 1. FIG.
1 and 2 show a structural example of a fire door in which the present invention is implemented. In particular, an embodiment is shown in which the door body 2 (hereinafter referred to as a fire door) is configured as an open door type that can be opened and closed in the direction of arrow 3 (horizontal direction) around the hinge mechanism 1. Reference numeral 4 in the drawing denotes a steel opening frame, which is configured to open and close in a state in which the fire door 2 is closed (fitted) into the surface of the opening 4a. However, it does not mean that the object of the present invention is limited to the hinged door fire door illustrated in FIGS. 1 and 2.
The illustrated opening frame 4 is fitted into the opening of the refractory wall 5 and is installed in an integral structure with the refractory wall 5 in a configuration known to those skilled in the art. Reference numeral 6 denotes a concrete floor.
The illustrated opening frame 4 has a small tolerance gap between the door stop surface 4b for receiving the fire door 2 and the fire door 2 in the closed state in which the fire door 2 is confined in the opening 4a. The opening edge 4c which opposes is provided.

When the fire door 2 having the above configuration is confined in the opening edge 4c of the opening frame 4, a minute gap (a gap including a fitting tolerance) is always generated between the surfaces of the two facing each other. As means for effectively closing the gap, two types of embossed steel plates 10 and 11 shown in FIGS. 3 and 4 or a corrugated steel plate 12 illustrated in FIG. 6 is used in the present invention.
First, the structure of each embossed steel plate 10 and 11 is demonstrated based on the Example of FIG. 3 and FIG.
The embossed steel plate 10 shown in FIG. 3 is convex only on one side of a thin steel plate made of a flat plate (only on the upper surface side in FIG. 3B) so that the basic form of the forming method of the convex portion 10a and the concave portion 10b can be understood in FIG. 3B. The part 10a is struck out (raised) in the same shape and size in a certain arrangement which will be described in detail later. The valley portions between at least two or four adjacent convex portions 10a and 10a are formed as concave portions 10b having substantially the same shape and the same size as the convex portions 10a. In addition, the concave portions formed on the back side of each convex portion 10a are also formed as concave portions 10b having substantially the same shape and size as the respective convex portions 10a. The convex portions 10a and the concave portions 10b are formed in a uniform arrangement on the entire surface of the thin steel plate.
In addition, when the arrangement relationship between the convex portions 10a and the concave portions 10b is viewed in plan, it is formed in a so-called checkered pattern arrangement alternately in the vertical and horizontal directions as can be understood from FIG. 3A. Therefore, when the two embossed steel plates 10 and 10 having the above-described configuration are overlapped in an arrangement in which the convex portions 10a and the concave portions 10b are aligned, the two embossed steel plates 10 and 10 are fitted into the concave portions 10b. Almost overlap each other.
In addition, although the planar shape of each convex part 10a and each recessed part 10b of the Example shown to FIG. 3A is square shape, it is not this limitation.
In short, the convex portion 10a of the embossed steel sheet 10 and the concave portion 10b, which is a valley between two adjacent convex portions 10a, are connected to each other with a common peripheral side wall. In addition, each peripheral side wall is formed as an inclined surface having the same gradient angle in common, and the convex portion 10a and the concave portion 10b are the same shape, the same trapezoidal shape (or truncated pyramid shape) in which the peripheral side walls are connected in a series. ). Therefore, when the positions of the convex portions 10a and the concave portions 10b coincide with each other and overlap each other, they are fitted to each other to a certain depth according to the magnitude of the pressure to be overlapped, and are closely overlapped.
Therefore, when the embossed steel plate 10 having the above-described configuration is applied to the fire door 2 and the opening frame 4 for closing the fire door 2 as illustrated in FIG. It is subdivided by the fitting state of the convex portion 10a and the concave portion 10b or an overlapping configuration to realize a close gap preventing structure and exhibit the effect of enhancing the gap closing effect.
From a strict viewpoint, the embossed steel plate 10 shown in FIGS. 3A and 3B has a convex portion 10a punched out only on one side of the thin steel plate. Therefore, there is a so-called front / back distinction in the steel sheet, and when the surfaces to be relatively wrinkled are configured to have a surface-to-surface or front-to-back relationship, they have a relationship of fitting or overlapping each other. However, it is inevitable that the configuration in which the back surfaces are made to face each other is inconvenient in that they can be fitted with each other or cannot be overlapped with each other.

Next, the embossed steel plate 11 shown in FIG. 4 is slightly different from the embodiment shown in FIG. 3 in the basic method of forming the convex portions 11a and the concave portions 11b. That is, the convex portions 11a are projected (raised) in a staggered arrangement toward the upper and lower surfaces of a thin steel plate made of a flat plate. And the back part of each convex part 11a is reversely formed as the recessed part 11b of substantially the same shape and the same size as the said convex part 11a. Not only the portions corresponding to the valleys of two or four adjacent convex portions 11a are also formed as concave portions 11b having substantially the same shape and size as the convex portions 11a.
Also in the case of the present embodiment, the arrangement of the convex portions 11a is formed in a so-called checkered pattern arrangement alternately in the vertical and horizontal directions. And the peripheral side wall formed in the shape which connected the convex part 11a and the recessed part 11b in series is formed in the trapezoid shape (or truncated pyramid shape) by the inclined surface which is respectively common by the same large gradient angle.
Therefore, also in the case of the present embodiment, when the two embossed steel plates 11 are overlapped with the positions of the convex portions 11a and the concave portions 11b being aligned with each other up and down, the two embossed steel plates 11 are mutually reciprocated to a certain depth according to the magnitude of the overlapping pressure. It will be in a state of fitting or overlapping.
As a result, the minute tolerance gap generated (or allowed) between the fire door 2 and the opening frame 4 that closes the fire door 2 is subdivided by a configuration in which the convex portion 11a and the concave portion 11b are fitted or overlapped. It realizes the gap prevention structure and demonstrates its effects.

Here, the dimensional specifications suitable for the embossed steel plates 10 and 11 illustrated in FIGS. 3 and 4 will be described.
In short, the fire door 2 is closed by an operation of closing the inside of the opening edge 4c of the opening frame 4 as illustrated in FIGS. Therefore, the height of the convex portions 10a and 11a of the embossed steel plates 10 and 11 is within the range of the fitting tolerance allowed for the operation of closing the fire door 2 to the inside of the opening edge 4c of the opening frame 4, It is necessary to have a dimensional specification that does not hinder the opening and closing operation of 2.
Specifically, the shape of the convex portions 10a and 11a of the embossed steel plates 10 and 11 and the dimensional specifications of the concave portions 10b and 11b naturally do not hinder the operation of closing the fire door 2 into the opening frame 4. Thus, it is necessary to design the respective dimensions of the concave and convex portions within the range of the fitting tolerance so as to contribute to the realization of the target gap prevention structure. Examples of dimensional specifications that meet such conditions are as follows.
First, the thickness of the steel plate as the raw material is preferably in the range of about 0.3 to 1.6 mm from the viewpoint of ease of forming and weight reduction. More strictly speaking, a plate thickness range of about 0.5 to 1.0 mm is preferable. And the height of the back (bump height) from the steel plate surface to the top of the projections 10a and 11a shown in FIGS. 3 and 4 or, conversely, the depth of the recess 11b formed on the back of the projection shown in FIG. 4B The thickness is preferably approximately equal to the plate thickness or about twice the plate thickness. If the raised height is larger than the above, when the fire door 2 is closed to the inside of the opening edge 4c of the opening frame 4, a harmful catching action or a slip resistance action is caused, and the usability of the fire door 2 is damaged. Because.
In addition, regarding the planar shapes of the convex portions 10a and 11a, and hence the concave portions 10b and 11b, the squares or rectangles shown in FIGS. 3A and 4A are preferable. However, it can also be implemented with a circle, ellipse, triangle, hexagon or other polygon.

Next, FIGS. 5A and 5B conceptually show an example of a gap prevention structure in which the embossed steel plate 10 or 11 having the above configuration is applied to the fire door 2 illustrated in FIGS. 1 and 2. First, the embodiment of FIGS. 5A and 5B will be described.
When the fire door 2 is closed into the opening frame 4 and closed, the structure for preventing the gap of the fire door shown in FIG. Is applied, and either of the embossed steel plates 10 or 11 is attached in a flat shape and integrated. In this case, the ceramic adhesive 13 is applied in a thick layer shape about the height of the convex portion 10a or 11a of the embossed steel plate 10 or 11, and the convex portion 10a or 11a is buried in the adhesive layer to be flattened. It is preferable to adhere to the shape.
Similarly, when the fire door 2 is closed to the opening frame 4, the ceramic adhesive 13 is also applied to the surface facing the door contact surface 4 b of the opening frame 4 and the embossed steel plate 10 or It implements by the structure which affixed any 11 and integrated.
Note that the adhesive is not limited to the ceramic adhesive. Any fire-resistant adhesive can be used without particular attention. Welding can also be performed. As long as it is an adhesive or a technique that can tightly seal the gap when affixing, it can be similarly employed.
In the case of the embodiment shown in FIG. 5A, as far as possible, the positional relationship between the door contact surface 4b of the opening frame 4 and the embossed steel plates 10 or 11 attached to the facing surfaces of the fire door 2 respectively. It is important that the embossed steel plate 10 or 11 is accurately positioned so that the convex portion of the embossed steel plate 10 or 11 fits into the concave portion on the counterpart side.
When implemented in the above configuration, when the fire door 2 is closed to the opening frame 4 and pressed against the door contact surface 4b, the convex portions of the embossed steel plates 10 or 11 that are in contact with each other are just the concave portions 10b of the other party. Or it becomes the relationship which fits and fits exactly into 11b, and implement | achieves the state which both embossed steel plates 10 or 11 fit or overlap. Therefore, it becomes the structure which subdivides and closes the space | gap permitted between both the fire door 2 and the opening frame 4, and there exists an effect of gap prevention.

In addition to the configuration of the above embodiment, in addition to the door contact surface 4b of the opening frame 4, the above-described embossed steel plate 10 or 11 is also provided on the opening edge portion 4c and the surface facing the opening edge portion 4c in the fire door 2. When any one of the above is attached and the gap prevention structure is implemented with the same configuration, a configuration in which the effect of preventing gaps is further enhanced can be realized.
Furthermore, the embossed steel plate 10 or 11 is not limited to the configuration in which the embossed steel plate 10 or 11 is attached with the adhesive 13 as described above, but the door contact surface 4b and the opening edge 4c of the opening frame 4 and the door contact surface 4b in the fire door 2. It is also preferable that the configuration of the surface facing the opening edge 4c is formed from the embossed steel plate 10 or 11 from the beginning.
Incidentally, the embodiment shown in FIGS. 5B and 5C shows a configuration example in which the entire surface plate which is the outer surface of the fire door 2 is formed of the embossed steel plate 10 or 11.

Next, FIG. 6 shows an example of the corrugated steel sheet 12. FIG. 7 shows a second embodiment of the gap prevention structure for a fire door using the corrugated steel sheet 12 described above.
The corrugated steel sheet 12 shown in FIG. 6 is a constituent material that closes as much as possible a gap formed between the surfaces of the two facing each other when the fire door 2 is confined and closed in the opening frame 4. Convex ridges 12a and concave grooves 12b having dimensional specifications comparable to the convex portions and concave portions in FIGS. 3A and 4A are configured in a wave shape that alternately and continuously repeats in one direction.
As for the dimensional specifications of the corrugated steel sheet 12, the sheet thickness of the steel sheet is about 0.3 mm to 1.6 mm, more specifically 0.5 mm to 1.0 mm, similarly to the embossed steel sheet 10 or 11 of Example 1 described above. The degree is preferred.
And as for the height (bump height) of the protruding item | line 12a shown in FIG. 6 from the steel plate surface, and the depth of the ditch | groove 12b, plate thickness equivalent or about twice as much as plate thickness is preferable. If the protruding height (back height) of the ridges 12a is larger than the above, unnecessary catching or slipping resistance is generated during the operation of closing (fitting) the fire door 2 into the opening edge 4c of the opening frame 4. This is because the usability of the fire door 2 is harmed.
Regarding the cross-sectional shapes of the ridges 12a and the grooves 12b, in addition to the rectangular wave shape shown in FIG. 6, a trapezoidal wave shape with a slight gradient angle on the side wall, or an arc shape having a rounded shape as a whole. An elliptical waveform or a triangular waveform can be similarly applied.

Next, the gap prevention structure of the fire door shown in FIG. 7A is formed on the surface of the door contact surface 4b that receives the fire door 2 in the opening frame 4 when the fire door 2 is closed in the opening frame 4 first. Again, the ceramic adhesive 13 is thickly applied, and the corrugated steel sheet 12 is attached and integrated. In this case as well, the ceramic adhesive 13 is applied in a thick layer equivalent to the height of the ridges 12a of the corrugated steel sheet 12, and the ridges 12a are tightly embedded in the adhesive layer to stabilize it flat. It is preferable to adhere and fix to the shape.
On the other hand, regarding the fire door 2 shown in FIGS. 7A and 7B, in the case of the present embodiment, the surface plates on both the front and back surfaces are formed of the corrugated steel plate 12 described above. However, as shown in FIGS. 5A and 5B described above, the present invention can be similarly implemented with a configuration in which the corrugated steel plate 12 is pasted by limiting only to a certain region of each surface of the region facing the door contact surface 4b. . Furthermore, it is also preferable that the corrugated steel plate 12 is attached to the opening edge 4c of the opening frame 4 and the surface of the fire door 2 facing the opening edge 4c.

  In any of the above-described embodiments, the corrugated directionality (streaks) of the corrugated steel sheet 12 is arranged such that the grooves 12b of the corrugated steel sheet 12 and the streaks of the ridges 12a are connected to the opening frame 4. In the closed state where 2 is closed, the overlapping direction of both, specifically, the door contact surface 4b is pasted with the corrugated streak directed in the direction perpendicular to the X arrow direction added in FIG. Similarly, with respect to the opening edge 4c, it is effective to install the groove 12b and the protrusion 12a in the direction perpendicular to the X arrow direction in FIG. It is important to secure.

Although the present invention has been described based on the illustrated embodiments, the present invention is not limited to the configuration and operation of each embodiment. I would like to mention that the technical idea includes the scope of modifications and applications similar to the design changes made by those skilled in the art as necessary.
For example, based on the embodiment illustrated above, the application of the embossed steel plate 10 or 11 or the corrugated steel plate 12 has been illustrated and described, and the entire surface of the fire door is the embossed steel plate 10 or 11 or the corrugated steel plate 12. In addition to the case where it is formed or pasted only on a necessary part of the surface, in addition to the embodiment of the above configuration, it can also be carried out as follows.
For example, as shown in FIG. 5C as a representative example, one end of a fin 15 for smoke prevention having heat resistance and elasticity is attached to either one of the surfaces that form a gap between the fire door 2 and the opening frame 4. The other end can be elastically brought into contact with the mating surface to implement a configuration that further enhances the effect of blocking and smoke prevention. This point can be similarly applied to the embodiments of FIGS. 5A, 7A, and B.
Alternatively, as representatively shown in FIG. 7B, a corrugated steel sheet that is relatively wrinkled by attaching a heat-resistant and elastic packing sheet 16 to either one of the faces of the fire door 2 and the opening frame 4 that face each other. 12 or the structure which block | closes the clearance gap with the other party side surface of the embossed steel plates 10 and 11 more effectively can be implemented similarly. This point can be similarly applied to the embodiments of FIGS. 7A and 5A to 5C.

2 Fire door 4 Opening frame 10a, 11a Convex part 10b, 11b Concave part 10, 11 Embossed steel plate 12a Convex strip 12b Concave groove 12 Corrugated steel plate

Claims (3)

When the fire door is closed into the opening frame and closed, the gap generated between the surfaces facing each other is closed, so that at least the surface facing the fire door in the opening frame and at least the opening frame in the fire door A plurality of small and low convex portions are formed in a uniform arrangement on the entire surface, and a valley portion between adjacent convex portions is formed in a concave portion having substantially the same shape and the same size as the convex portion. Made of embossed steel plate,
A structure for preventing a gap in a fire door, wherein the recesses and the protrusions of both embossed steel plates facing each other are fitted or overlapped with each other in a closed state in which the fire door is confined in an opening frame. When the fire door is closed into the opening frame and closed, the gap generated between the surfaces facing each other is closed, so that at least the surface facing the fire door in the opening frame and at least the opening frame in the fire door A plurality of small and low convex portions are formed in a uniform arrangement on the entire surface, and the rear surface of the convex portion is formed in a shallow concave portion having the same shape and the same size as the convex portion. Made of embossed steel plate,
A structure for preventing a gap in a fire door, wherein the recesses and the protrusions of both embossed steel plates facing each other are fitted or overlapped with each other in a closed state in which the fire door is confined in an opening frame.   Arrangement of a plurality of small and low convex portions of an embossed steel plate, and arrangement of a concave portion that is a valley between adjacent convex portions, or arrangement of small and low convex portions of an embossed steel plate, and a concave portion formed on the back surface of the convex portion The fire prevention door gap prevention structure according to claim 1 or 2, characterized in that each of the arrangements is a checkered pattern arrangement.

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