JP7376256B2 - Connection structure of fireproof panels - Google Patents

Description

The present invention relates to the technical field of connection structures for fire-resistant panels used to form sections such as fire-resistant sections provided in structures such as buildings and warehouses.

Generally, fire-resistant panels are sometimes used to form sections such as fire-resistant compartments, fire prevention compartments, smoke exhaust compartments, evacuation compartments, etc. In this case, adjacent fire-resistant panels on the left and right are connected in a series. Fireproof partition walls may be constructed. A known example of a fire-resistant panel used in such cases is one that is formed into a panel shape by filling a core material with fire-resistant and heat-insulating properties between a pair of front and back metal face plates (front and back plates). (For example, see Patent Document 1 and Patent Document 2.).
By the way, when forming a fire-resistant partition wall (partition) using a fire-resistant panel formed by filling a fire-resistant and heat-insulating core material between the pair of face plates, the fire-resistant part at the joint between the fire-resistant panels Performance becomes an issue. In other words, if a fire breaks out in a space on one side divided by such a partition wall, the adhesion between the face plate and the core material will peel off due to high heat, and the face plate will be damaged. As a result, there is a risk that a gap will be created in the joint between the fireproof panels, and that flame, heat, and smoke may move into the space on the non-fire side and cause a fire to spread (similar fire).
Therefore, as in the above-mentioned Patent Documents 1 and 2, a convex part and a concave part are formed in the connection part between adjacent fireproof panels so that the male and female parts fit into each other, and these concave and convex fitting parts are filled with a filler. It is proposed that this filler be made of a fire-resistant and heat-insulating material so that the connecting portion can maintain its fire resistance even in the event of a fire.
However, in Patent Document 1, the uneven fitting parts are filled with a filler material, so the uneven fitting parts are not directly fitted to each other. When the metal surface plate that forms the outer surface (outer shell) of the concave-convex mating area is deformed (particularly deformed to open outward in the front-rear direction), the concave-convex mating structure cannot be maintained. As a result, there is a risk that the fire resistance and insulation properties will be lost early, and heat will be transferred back and forth through the space without filler provided between the front and rear of the concave-convex mating area. There are also factors that impair fire resistance and insulation properties. On the other hand, in Patent Document 2, the filler is provided without any gaps as in Cited Document 1, but in this case too, the surface plate has undergone large thermal expansion due to exposure to high heat during a fire. There is a risk that the male-female mating state of the fire-resistant panels may become disconnected, resulting in a gap between the fire-resistant panels.
Therefore, a gap is formed between adjacent core materials to connect the fire-resistant panels, and a fire-resistant heat insulating material is inserted into the gap with grooves formed on both front and rear sides, and at the bottom of the groove. After fixing the end edges of the pair of surface plates laminated to each other with screws, a cover material is fitted into the groove to cover the groove, thereby ensuring the strength of the connecting portion, A structure has been proposed in which the joints between fire-resistant panels are able to maintain their shape as much as possible when exposed to high heat, thereby preventing the spread of fire from the side where the fire has occurred to the side where the fire has not occurred (e.g. See Patent Document 3 (especially the one in FIG. 7).

Publication No. 6-49727 Japanese Patent Application Publication No. 2011-12435 Patent No. 5721383

By the way, the product of Patent Document 3 has a structure in which the surface plates laminated to each other are integrated with screws at the connection part to increase strength, so it is possible to provide a product that can demonstrate the required fire resistance performance, and it is not suitable for practical use. Although it has been developed as After the edges are fixed with screws, the lid material is inserted into the groove, which not only increases the number of parts but also improves the workability of connecting fireproof panels at the construction site. There are problems such as not only being inferior but also increasing costs, and further improvements are required, and there is a problem to be solved by the present invention.

The present invention was created for the purpose of solving these problems in view of the above-mentioned circumstances, and the invention of claim 1 is directed to a pair of front and rear metal parts provided with a gap in the front and back direction. To connect the left and right adjacent connecting edges of a fire-resistant panel, which is composed of a face plate and a core material with fire-resistant and heat-insulating properties filled between the two face plates, in a series by abutting against each other. A connecting structure for fire-resistant panels, wherein the core material includes first and second opposing surfaces whose central portions in the front-rear direction are in contact with or substantially in contact with each other in a state in which the fire-resistant panels are connected in a series. , the front and rear face plates include a main body surface portion that constitutes the front and rear surfaces of the fireproof panel, and first and second extension surface portions that extend from the main body surface portion and face each other when the adjacent fireproof panels are connected to each other. , in the front and rear first extension surface parts, an outer piece extends from the main body face part toward the other fireproof panel side, and an inner piece is formed by folding back inward in the front and rear direction from the extending tip edge of the outer piece. and a fitting recessed groove portion in which the piece following the inner piece constitutes an outer side piece in the front-rear direction are provided in a state located on the outer side in the front-rear direction of the first opposing surface portion, and the second extension surface portion in the front and back The external fitting piece part is formed to continue from the main body surface part so that the extending piece part is located on the inside in the front and back direction so that the extending piece part fits outward, and the part that continues from the outer fitting piece part becomes an outer piece in the front and back direction. A fitting convex portion that fits into the fitting groove portion in contact with or substantially in contact with the fitting groove portion is provided on the outer side in the front-rear direction of the second opposing surface portion, and a fitting convex portion that fits in the fitting groove portion in a state of contact or substantially abutment is provided on the front-rear direction outer side of the second opposing surface portion, and The extension surface portion is bent inward in the front and back direction from the tip edge of the inner side piece in the front and rear direction of the fitting concave groove and/or the fitting convex portion, and the first and second opposing surfaces facing each other are bent inward in the front and back direction. A clamping piece portion is provided between the two to be clamped in a range up to an intermediate position that does not reach the central portion in the front-rear direction, and the clamping piece portion is provided only on either one of the first and second extension surface portions. It is a connected structure of fireproof panels that is characterized by
The invention according to claim 2 is configured to include a pair of front and rear metal surface plates provided with a gap in the front and back direction, and a core material having fireproof and heat insulating properties filled between the two surface plates. This is a connecting structure for fire-resistant panels that connects the left and right adjacent connecting edges of fire-resistant panels against each other in a series. The front and rear face plates are provided with first and second facing surfaces that face each other in contact or substantially contact with each other, and the front and rear face plates include a main body surface that constitutes the front and rear surfaces of the fireproof panel, and a main body surface that extends from the main body surface and that is connected to the adjacent surface. front and rear first and second extension surfaces that face each other when the fire-resistant panels are connected, and the front and rear first extension surfaces include an outer piece that extends from the main body surface toward the other fire-resistant panel. an extending piece portion in which the inner piece is formed by folding back inward in the front-rear direction from the extending tip edge of the outer piece; and a fitting recessed groove portion in which a piece following the inner piece constitutes an outer side piece in the front-rear direction. The extension piece is provided so as to be located on the outer side in the front and back direction of the first facing surface part, and the extension piece part is formed on the front and rear second extension surface part so as to be located on the inner side in the front and back direction so as to fit outwardly. a second outer fitting piece, and a fitting convex portion that continues from the outer fitting piece and becomes an outer piece in the front-rear direction and fits into the fitting groove in contact with or substantially in contact with the fitting groove. The front and rear first and second extension surfaces are provided on the outside of the opposing surface in the front and back direction, and the fire-resistant panels are adjacent to each other beyond the first and second opposing surfaces in a state where the fire-resistant panels are connected in a series from side to side. Extending in a front-back symmetrical manner to the panel side, and extending in the left-right direction beyond the first and second opposing surfaces of the front and rear first and second extension surfaces are for joints provided on the first and second opposing surfaces. This is a fireproof panel connection structure characterized in that the connection does not exceed the joint plate material inserted into the groove .
The invention according to claim 3 is characterized in that the width from the outer side of the extending pieces of the first extension surfaces facing each other to the inner side of the fitting groove is set to 1/4 or less of the thickness of the fireproof panel. The fireproof panel connection structure according to claim 1 or 2, characterized in that:
The invention of claim 4 provides that at least one of the first and second extension surfaces has a groove extending in the front-rear direction from the distal end edge of the inner side piece in the front-rear direction of the fitting groove and/or the fitting convex portion. A clamping piece is provided between the first and second opposing surfaces that are bent inward and clamped in a range up to a midway position that does not reach the central part in the front-rear direction. 4. The fireproof panel connection structure according to claim 2 or 3, characterized in that:
The invention according to claim 5 is characterized in that the width from the outer side of the extending piece to the inner end of the holding piece is set to 1/3 or less of the thickness of the fireproof panel. It is a connected structure of fireproof panels.
The invention according to claim 6 is the fireproof panel connection structure according to claim 1, wherein the holding piece portion is provided on the first extension surface portion.
The invention of claim 7 provides that the extension of the front and rear first and second extension surfaces in the left-right direction beyond the first and second opposing surfaces is in a groove for joints provided in the first and second opposing surfaces. The connecting structure of fire-resistant panels according to claim 1, claim 3 referring to claim 1, or claim 6, characterized in that the connection structure does not exceed the joint plate material of the fitting.

By making the invention of Claims 1 and 2, as a connection part between fireproof panels, the fireproofing is performed on the outer side in the front and back direction of the part where the core materials are facing each other in a state where they are in contact or substantially in contact with each other in the central part in the front and back direction. The first and second extended surfaces formed as extensions from the main body surface of the face plate, which become the front and rear surfaces of the panel, fit together the extending pieces formed thereon and the external fitting pieces, and the fitting on the inside thereof. Since the connecting structure has a double inner and outer fitting structure by fitting the mating concave groove and the mating convex part, it can withstand high heat and is difficult to deform, and even if it deforms, both extension pieces can As a result, it is possible to maintain the laminated structure as much as possible, and as a result, it is possible to provide a connection structure between fireproof panels with an excellent fireproof insulation structure without the need to fill the opposing surfaces of the core materials with fireproof insulation material. , and can be done without the need for troublesome work such as fixing screws.
Moreover, from the inside piece of the fitting concave groove and/or the fitting convex part of the first and second extension surfaces that fit into each other, the clamping part held between the first and second opposing surfaces is located at the center in the front-rear direction. Because it is provided in a state that does not reach the front and back sides of the fireproof panel, it is possible to maintain the shape of the concave grooves and convex parts that fit together with the clamping pieces, and increase the strength. Since there is no heat bridge where the face plates are connected to each other at the center, it is possible to avoid loss of fire resistance.
Furthermore, in the invention of claim 1, since the holding piece has a single plate structure formed only on one of the first and second extension surfaces, the shape of the fitting groove and the convex portion is as described above. It is possible to reduce the heat conduction from the fire occurrence side while maintaining the structure and increasing the strength, thereby reducing the loss of fire resistance and insulation properties.
Further, by the invention of claim 2, the front and rear first and second extension surfaces are adjacent to each other beyond the first and second facing surfaces in a state in which the fireproof panels 1 are connected in a series from side to side. Since it extends symmetrically from front to back toward the fireproof panel side, it can exhibit excellent fireproofing performance. In addition, a non-combustible joint board material is fitted into the central part of the fireproof panel in the thickness direction, extending beyond the front and rear first and second extension surfaces. This can be achieved while increasing strength.
According to the invention of claim 3, the width from the outer side of the extending pieces of the first extension surfaces facing each other to the inner side of the fitting groove is 1/4 or less of the thickness of the fireproof panel. As a result, the opposing portions of the first and second opposing surfaces of the core material can be secured with a width of 1/2 or more of the panel thickness on the center side of the thickness of the fireproof panel, and are fitted in a state facing each other. Even though there is a matching first extension surface portion , high fire resistance and heat insulation properties can be exhibited.
According to the invention of claim 4, from the inner piece of the fitting concave groove and/or the fitting convex portion of the first and second extended surface portions that fit into each other, between the first and second opposing surface portions. Since the clamping part to be clamped is provided in a state that does not reach the central part in the front-rear direction, the shape of the concave groove part and the convex part for fitting into each other can be maintained by the clamping piece part, and the strength can be increased. Since there is no heat bridge that is separated at the center of the connection between the front and back surface plates provided on both sides of the fireproof panel, it is possible to avoid loss of fire resistance.
According to the invention of claim 5, the width from the surface of the fireproof panel to the formed clamping piece becomes 1/3 or less of the thickness of the fireproof panel. Since the width of the two opposing surface portions can be secured as wide as 1/3 or more of the panel thickness on the thickness center side of the fireproof panel, high fireproof and heat insulating properties can be exhibited.
According to the invention of claim 6, since the holding piece is provided on the first extension surface, it protects the inner open end of the fitting groove of the fitting groove. The fitting convex portion can be reliably fitted to the fitting convex portion, and workability can be improved.
According to the invention of claim 7, the non-combustible joint board material is fitted and incorporated into the thickness direction center portion of the fireproof panel in a state extending beyond the front and rear first and second extension surface portions. As a result, better fire resistance performance can be achieved while increasing strength.

It is a front view of the partition wall which connected the fireproof panel. FIG. 3 is a perspective view of a main part of a partition wall. FIG. 3 is a horizontal cross-sectional view of a partition wall. FIG. 3 is an enlarged horizontal cross-sectional view of a connecting portion of a fireproof panel. FIG. 3 is an enlarged horizontal cross-sectional view of the connecting portion of the fireproof panel in an exploded state. FIG. 3 is an enlarged horizontal sectional view showing the dimensional relationship of the fireproof panel.

Embodiments of the present invention will be described below based on the drawings. In the drawings, reference numeral 1 denotes a fireproof panel, and the fireproof panel 1 includes a pair of front and back (front and back) surface plates 2 made of non-combustible metal materials such as steel or stainless steel, and a space between the two surface plates 2. A fire-resistant and insulating material such as rock wool or ceramic wool is used for filling (insertion) (the material used in this embodiment is a high-density type, and is made of compressible wool fiber-based material). The fire-resistant panel 1 includes a core material 3 formed of a material (formed from a material made of a material), and the fire-resistant panel 1 is constructed of a core material 3 formed of a material made of By connecting the left and right connecting edges facing each other in a series, a partition wall Z is formed which is used to partition the indoor space of buildings, warehouses, factories, etc. into sections such as fireproof sections and fire prevention sections. It is set up so that it can be done.
In the present embodiment, the partition wall Z constructed by connecting the fireproof panels 1 (1a, 1b) in this way is connected vertically by rail materials 4 and 5 provided on the ceiling surface H and floor surface F of the indoor space, respectively. It is designed to be assembled with the end edges being clamped from the front and back directions. Incidentally, the space between the front and rear rail materials 4 and 5 is set to be filled with a filler 6 made of a fire-resistant and heat-insulating hair fiber material such as rock wool or ceramic wool. Furthermore, in this embodiment, the rail materials 4 and 5 are fixed to the ceiling surface H, the floor surface F, and the fireproof panel 1 through appropriately selected fixing materials 7 such as screws. There is.

As described above, adjacent fire-resistant panels 1, that is, one fire-resistant panel 1a and the other fire-resistant panel 1b, are arranged in a series on the inner side of the left and right edges of the core material 3 in the front-rear direction (thickness direction). When connected, the connecting portion The first and second opposing surface portions 3a and 3b are set to directly face each other in a planar state. In other words, the first and second opposing surface parts 3a and 3b are opposed to each other in a state where they are in contact with each other with no gap or almost in contact with each other with a small gap, and between the first and second opposing surface parts 3a and 3b. The setting is such that something like the filler 6 does not exist (is not provided).
In the first and second opposing surface portions 3a and 3b, groove portions 3c for joints are formed in the left-right direction so as to be parallel to the surface of the top plate 2, with the fireproof panel 1 located at the center in the front-rear direction. When the adjacent fireproof panels 1a and 1b are connected, the joint grooves 3c facing each other are filled with noncombustible material such as calcium silicate or calcium carbonate. A joint board material 8 formed of a hard material is fitted and incorporated in a bridging shape (so as to span both joint grooves 3c), and the assembled joint board material 8 connects the first and second opposing surfaces 3a, 3b is configured to be partitioned into front and back.
In addition, in the figure, 9 is a sealing material filled in the gap on the surface side between the tip 2k of the extending piece 2e and the external piece 2n, but the sealing material 9 is not provided as necessary. Its presence or absence does not affect fire resistance.

The front and rear surfaces (front and back) of the surface plate 2 are each formed of a single plate, and include a main body surface portion 2a that is the front and rear surfaces (front and back surfaces) of the fireproof panel 1, and a main body surface portion 2a that extends from the main body surface portion 2a in the left and right direction. first and second extended surface portions 2b that extend outward and face each other at the connecting portion 2m, and these configurations will be described in detail below.

First, the first extension surface portion 2b is formed on one side of the fireproof panel 1a in the connecting portion ) An extending piece portion 2e formed with an outer piece 2c, an inner piece 2d folded back inward in the front-rear direction from an extending tip 2k of the outer piece 2c, and one fireproof member from the inner piece 2d. A groove side piece 2f on the outer side in the front and back direction continuing toward the panel 1a side, a groove bottom piece 2g bent from the tip (rear end of the groove) of the groove side piece 2f toward the inside in the front and rear direction, and a tip of the groove bottom piece 2g. A fitting concave groove portion 2i constituted by a groove side piece 2h on the inside in the front and back direction bent from the inner end in the front and back direction toward the other fireproof panel 1b side is the outside in the front and back direction of the first opposing surface portion 3a. , and the position in the left-right direction of the opening end of the fitting groove 2i (in this embodiment, the opening end of the inner piece 2h) is substantially opposite to the first and second facing surfaces 3a and 3b. It is set to be.

Further, in this case, between the tip of the inner groove side piece 2h of the fitting groove part 2i (the opening end on the inside of the fitting groove part 2i in the front and rear direction) and the first and second opposing surfaces 3a and 3b (opposing By fitting between the two opposing surfaces 3a and 3b, a clamping piece 2j is formed which is clamped between the opposing surfaces 3a and 3b. As a result, the first and second opposing surface portions 3a and 3b are configured to directly oppose each other in a portion where the clamping piece portion 2j is not provided.
The inner piece 2d of the extending piece 2e extends from the arc-shaped tip 2k of the extending piece 2e to the opposing position (abutting position) of the first and second opposing surfaces 3a and 3b. However, the inner piece 2d of the extending piece 2e is opposed to the outer piece 2c with a gap S therebetween, and toward one fireproof panel 1a side (fitting groove 2i side). It is slanted so that the interval is wide.

On the other hand, the second extension surface portion 2m is formed on the other fireproof panel 1b side in the connecting portion The outer fitting piece 2n is bent so that it is located on the inside in the front-rear direction, and the side piece 2o that continues from the outer fitting piece 2n to one fireproof panel 1a side is the outer side piece 2o in the front-rear direction. A tip piece 2p is bent inward in the front-rear direction from the tip (left-right tip) of the piece 2o, and a tip piece 2p is bent toward the other fireproof panel 1 side from the tip (inner end in the front-rear direction) of the tip piece 2p. A fitting convex portion 2r, which is constituted by a side piece 2q on the inside in the front-rear direction and fits in the fitting groove portion 2i in a state of contacting or substantially abutting, is located on the outside in the front-rear direction of the second opposing surface portion 3b. It is located at

In this case, the external fitting piece 2n is bent inward in the front-rear direction from the main body surface 2a at a stage before reaching the position of the second opposing surface 3b in the left-right direction. It is bent parallel to the outer side piece 2o of the fitting convex portion 2r and is formed to continue flush with the outer side piece 2o.
Moreover, when the fitting convex part 2r is internally fitted into the fitting groove part 2i, the inner side piece 2q of the fitting convex part 2r has a length until its tip is located at the open end position of the fitting groove part 2i. The first extended surface portion 2b is provided with no clamping piece portion 2j.

In this way, the first and second extended surface portions 2b and 2m are formed on the surface plate 2, but in this embodiment, the core material 3 on one fireproof panel 1a side has the first opposing surface portion 3a. It is formed from the joint groove part 3c to the fitting groove part 2i, and the part corresponding to the fitting groove part 2i and the extending piece part 2e is a position that abuts the groove bottom piece 2h of the fitting groove part 2i. The first cutout surface portion 3d is cut out in a stepped shape and extends to the main body surface portion 2a. For this reason, in this embodiment, the core material 3 does not fit into the gap S formed in the extending piece portion 2e, which improves workability such as workability and assemblage of the core material 3. Improvements can now be made.
Moreover, as is clear from FIG. 4, the front and rear first and second extension surfaces 2b and 2m are made of non-combustible joint board material that fits into the joint grooves 3c provided on the first and second facing surfaces 3a and 3b. 8 is fitted and incorporated in a state extending beyond the front and rear first and second extension surface portions 2b, 2m, thereby achieving better fire resistance performance while increasing strength.
On the other hand, the core material 3 on the other fireproof panel 1b side extends outward in the front-rear direction from the second opposing surface portion 2b that extends from the joint groove portion 3c to the inner side piece 2q of the fitting convex portion 2r. The part extending to the outer side piece 2o of the fitting convex part 2r is cut out approximately along the outer fitting part 2n, and the second cutout part 3e extends to the main body part 2a. . Therefore, in this embodiment, the core material 3 is not inserted into the mating convex portion 2r, and this also improves workability such as workability and assemblage of the core material 3. It is now possible to plan.

Next, the dimensional relationship between the first and second extended surface portions 2b and 2m will be explained.
Now, when the thickness of the fireproof panel 1 is defined as A (panel thickness: e.g. 91 mm), the joint groove 3c is located at the thickness center O position, but the groove width B (e.g. 12 mm) is set to be 1/10 or more and 1/5 or less of the panel thickness A, so that the first and second opposing surface portions 3a and 3b of the core material 3 face each other in direct contact with each other. It is equipped with a surface part that
In addition, when the fireproof panels 1a and 1b are connected, the width C (for example, 15.5 mm) from the outer side piece 2c of the first extension surface part 2b to the inner groove side piece 2h of the fitting groove part 2i is the panel thickness. A is set to 1/4 or less of , the width including the joint plate material 8 of the opposing parts of 2 m (width between the inner groove side pieces 2h of the front and rear fitting grooves 2i) is thicker than 1/2 of the panel thickness A, so the core The structure is such that the fireproof insulation performance of Material 3 can be fully demonstrated.

Furthermore, in this case, the clamping piece 2j extends from the tip of the inner groove side piece 2h of the fitting groove 2i (the open end of the fitting groove 2i) toward the inside in the front-rear direction of the fireproof panel 1 (thickness center O side). The extending width (for example, 7.5 mm) D of the clamping piece 2j is equal to the width E of the first opposing surface 3a (width including the clamping piece 2j: for example, 23.5 mm). (1/3 or less of the width J (for example, 30 mm) from the thickness center O to the inner groove side piece 2h of the fitting groove 2i), thereby making the fitting groove 2i When the fitting convex part 2r is fitted into the fitting convex part 2r, the corner part of the tip piece 2p and the inner side piece 2q of the fitting convex part 2r is prevented from getting caught in the inner groove side piece 2h of the fitting concave groove part 2i. The first and second facing surfaces 3a and 3b have a thickness of the surface portions (including 8 portions of the joint plate material in this embodiment) that are directly opposite to each other and do not have the clamping piece portions 2j, while allowing smooth insertion. Since a wide area can be secured on the center O side, it is possible to effectively suppress loss of fire resistance and heat insulation properties even though the clamping piece portion 2j is provided.
Furthermore, in this case, the width (for example, 23.5 mm) G from the outer piece 2c of the extending piece 2e to the inner end of the clamping piece 2j is set to 1/3 or less of the panel thickness A. The thickness of the part without metal in the connection part X of the fireproof panel 1 can be secured to be 1/3 or more of the panel thickness A at the central part of the fireproof panel 1 in the front-rear direction, and the fireproof insulation properties are impaired. This means that it can be effectively suppressed.

In the present embodiment configured as described above, the fireproof panel 1 includes a pair of front and rear metal face plates 2 and a core material 3 having fireproof and heat insulating properties filled between the two face plates 2. By abutting the adjacent connecting edges and connecting them in a series, it is possible to provide a partition wall with excellent fire-resistant and heat-insulating properties.In this case, the core material 3 is a fire-resistant panel. The front and back sides of the fireproof panel 1 have first and second opposing surface parts 3a and 3b that face each other in contact or substantially contact with each other in the front-rear direction central part in a state where the panels 1 are connected in a series. It has a vertical structure including a main body surface part 2a constituting a surface, and first and second extension surface parts 2b and 2m extending from the main body surface part 2a and facing each other when the adjacent fireproof panels 1 are connected. There is.
In this case, the extending piece 2e provided on the outer side of the first extension surface 2b in the front-rear direction includes the outer piece 2c extending from the main body surface 2a toward the other fireproof panel 1b, and the outer piece 2c extending from the main body surface 2a toward the other fireproof panel 1b. The fitting groove portion 2 is formed with an inner piece 2d folded back and formed inward in the front-rear direction from the extending tip edge 2k, and is provided on the inner side in the front-rear direction with respect to the extending piece portion 2e. It is composed of an outer groove side piece 2f extending from the piece 2d toward one fireproof panel 1a side, a groove bottom piece 2g continuing from the outer groove side piece 2f, and an inner groove side piece 2h. The fitting groove portion 2i is provided so as to be located on the outer side of the first opposing surface portion 3a in the front-rear direction.

On the other hand, on the second extension surface section 2m, an external fitting section 2n, which is formed so as to continue from the main body surface section 2a so that the extension section 2e is externally fitted, is located on the outside in the front-rear direction, and the external fitting section 2n What follows is the front-rear outer piece 2o, and the fitting convex part 2r that fits in the fitting groove part 2i in contact or in a substantially abutting state is located on the front-rear inner side. It is configured to be provided on the outer side of the two opposing surface portions 3b in the front-rear direction.
As a result, in the connecting portion X between the fireproof panels 1 (1a, 1b), the first and second opposing surface portions 3a, in which the core members 3 face each other in a state in which they are in contact or substantially in contact with each other at the central portion in the front-rear direction, The first and second extended surface portions 2b and 2m extending from the main body surface portion 2a of the surface plate 2, which becomes the front and rear surfaces of the fireproof panel 1, on the front and rear sides of the portion 3b are extended piece portions formed thereon. 2e and the outer fitting piece 2n, and the fitting concave groove 2i and the fitting convex part 2r on the inside create a connection structure with a double inner and outer fitting structure, making it fireproof. The connecting and fitting parts of the surface plate 2 of the panel 1 can withstand high heat well and are not easily deformed, and even if deformed, the laminated structure between both extension pieces can be maintained as much as possible, which is an excellent result. A connection structure between fireproof panels 1 having a fireproof insulation structure can be provided, and there is no need to fill the space between the opposing surfaces of the core materials 3 with a fireproof insulation material as in the conventional method, and there is no need for the troublesome fixing with screws. This can be done without any work required.

Moreover, in this case, the width C from the outer piece 2c of the first and second extension surfaces 2b and the 2m extending piece facing each other to the inner piece 2h of the fitting groove 2i is equal to the thickness A of the fireproof panel 1. Since the width is set to 1/4 or less, the width between the facing parts including the joint plate material 8 between the first and second facing surface parts 3a and 3b of the core material 3 is the same as the width between the front and rear of the fireproof panel 1. It is possible to secure a width of 1/2 or more of the panel thickness A on the direction thickness center O side (inside in the front-rear direction), and the first panel is fitted facing each other and can withstand deformation at high temperatures. Although the second extension surface portions 2b and 2m are provided on both the front and rear sides, high fire resistance and heat insulation properties can be exhibited.

Further, in this case, the first extension surface portion 2b is bent inward in the front-rear direction from the tip edge (the edge on the other fireproof panel 1b side) of the inner groove side piece 2h of the fitting groove portion 2i, and A clamping piece 2j is provided which is clamped between the first and second opposing surface parts 3a and 3b, which are opposed to each other, but the clamping piece 2j does not reach the joint plate material 8 provided at the central part in the front-rear direction. Since it is held between the front and rear of the fireproof panel 1, it is possible to maintain the shape and increase the strength of the fitting groove part 2i and the convex part 2r by the holding piece part 2j. The connections between the surface plates 3 provided on both sides in the direction are separated at the center, and there is no heat bridge, which makes it possible to avoid loss of fire resistance and heat insulation.

Moreover, the clamping surface portion 2j is provided only in the first extension surface portion 2b in a state of being extended from the inner groove side piece 2h of the fitting groove portion 2i, and is not provided in the second extension surface portion 2m. Since it has a single plate structure, heat conduction to the sandwiching surface portion 2j (inner side in the thickness direction of the fireproof panel 1) is improved, and shape retention of the fitting groove portion 2i when fitting the fitting convex portion 2r is facilitated. However, this is more suppressed than in the case where the portion has a two-plate structure, contributing to an improvement in fire resistance and heat insulation properties. Moreover, since the clamping surface portion 2j has a flat plate shape that is simply clamped by the first and second opposing surfaces 3a and 3b, for example, the fitting groove portion 2i and the fitting convex portion 2r As in the case where a male and female mating structure in opposite directions is added to the inside of the mating area, the mutual mating structure becomes complicated, making it difficult to connect the fireproof panels 1 together on site. There are no defects that would make it difficult to remove, and in the early stages of a fire, heat is transmitted not only to the outer male and female mating parts that are directly exposed to heat, but also to the inner male and female mating parts. Accordingly, loss of fire resistance and heat insulation properties is also avoided.
In this case, by providing the clamping piece 2j on the first extended surface portion 2b side, the shape of the corner portion of the fitting groove portion 2i on the first opposing surface portion 3a side is maintained, and the fitting convex portion 2r is The width G from the outer side piece 2c of the extension part to the inner end of the holding piece part 2j is 1 of the thickness A of the fireproof panel 1, while facilitating the fitting work to the fitting groove part 2i and increasing the strength. /3 or less, the width of the core material 3 including the joint plate material 8 of the mutually opposing first and second opposing surface portions 2a and 2b is equal to the panel thickness A on the thickness center side of the fireproof panel 1. This means that high fire resistance and heat insulation properties can be achieved.
In this embodiment, the holding piece 2j is provided only on the first extended surface portion 2b side, but in the present invention, it may be provided on both of the second extended surface portions 2m. The two extension surface portions 2 may also be provided only on the sides. Furthermore, in this embodiment, the joint plate material 8 is provided at the center of the panel thickness A, but a structure in which the joint board material 8 is not provided may also be used. Since the core material 3 is configured without the concave groove portion 3c, the first and second opposing surface portions 3a and 3b are widely opposed to each other across the front and rear fitting grooves 2i, and the fire resistance and heat insulation properties are impaired. There isn't.

Further, in this product, joint grooves 3c facing each other are formed at the thickness center O portion of the first and second facing surfaces 3a and 3b of the core material 3, and the joint grooves 3c are non-combustible, Since the hard joint plate material 8 is fitted and incorporated, superior fire resistance performance can be achieved while increasing strength.
Moreover, in this case, since the width D in the front-rear direction of the clamping piece 2j is set to 1/4 or less of the width E of the first opposing surface 3a, the joint plate material 8 is incorporated in the center of the panel thickness A. However, since the width of the directly opposing surfaces of the first and second opposing surfaces 3a and 3b can be ensured wide, high fire resistance and heat insulation properties can be maintained.

INDUSTRIAL APPLICATION This invention can be utilized as a connection structure of the fireproof panel used for forming divisions, such as a fireproof division.

1 Fireproof panel 2 Surface plate 2a Main body surface part 2b First extension surface part 2c Outer piece 2d Inner piece 2e Extending piece part 2f Outer groove side piece 2g Groove bottom piece 2h Inner groove side piece 2i Fitting groove part 2j Clamping piece part 2m Second Extension surface portion 2n Outer fitting piece portion 2o Outer side piece 2q Inner side piece 2r Fitting convex portion 3 Core material 3a, 3b First and second opposing surface portions 3c Groove for joint 8 Joint plate material

Claims (7)

Adjacent to the left and right sides of a fire-resistant panel consisting of a pair of front and rear metal face plates with a gap in the front-rear direction, and a fire-resistant and heat-insulating core material filled between the two face plates. A connection structure of fireproof panels for connecting the connecting edges in a series by butting together the connecting edges,
The core material includes first and second opposing surface portions whose central portions in the front and back direction face each other in contact or substantially contact with each other in a state where the fireproof panels are connected in a series,
The front and rear surface plates include a main body surface portion that constitutes the front and rear surfaces of the fireproof panel, and first and second extension surface portions that extend from the main body surface portion and face each other when the adjacent fireproof panels are connected,
The front and rear first extension surface portions include an extension piece portion in which an outer piece extends from the main body surface portion toward the other fireproof panel side, and an inner piece is formed by folding back inward in the front-rear direction from the extending tip edge of the outer piece. and a fitting groove portion, in which a piece following the inner piece constitutes an outer side piece in the front-rear direction, is provided so as to be located on the outer side in the front-rear direction of the first opposing surface portion,
The front and rear second extension surface portions include an external fitting piece portion that is formed so as to continue from the main body surface portion so as to be located on the inside in the front and back direction so that the extension piece portion fits externally, and a portion that continues from the external fitting piece portion. a fitting convex portion that becomes an outer piece in the front-rear direction and fits in the fitting groove portion in contact with or substantially in contact with the fitting groove portion;
At least one of the first and second extension surfaces is bent inward in the front-rear direction from the tip edge of the inner piece in the front-rear direction of the fitting groove and/or the fitting convex portion. and a clamping piece is provided between the first and second opposing surface parts that are clamped in a range up to a midway position that does not reach the central part in the front-rear direction,
A connecting structure for fireproof panels, characterized in that the clamping piece is provided only on either one of the first and second extension surfaces. Adjacent to the left and right sides of a fire-resistant panel consisting of a pair of front and rear metal face plates with a gap in the front-rear direction, and a fire-resistant and heat-insulating core material filled between the two face plates. A connection structure of fireproof panels for connecting the connecting edges in a series by butting together the connecting edges,
The core material includes first and second opposing surface portions whose central portions in the front and back direction face each other in contact or substantially contact with each other in a state where the fireproof panels are connected in a series,
The front and rear face plates include a main body surface portion that constitutes the front and rear surfaces of the fireproof panel, and front and rear first and second extension surface portions that extend from the main body surface portion and face each other when the adjacent fireproof panels are connected. Prepare,
The front and rear first extension surface portions include an extension piece portion in which an outer piece extends from the main body surface portion toward the other fireproof panel side, and an inner piece is formed by folding back inward in the front-rear direction from the extending tip edge of the outer piece. and a fitting groove portion, in which a piece following the inner piece constitutes an outer side piece in the front-rear direction, is provided so as to be located on the outer side in the front-rear direction of the first opposing surface portion,
The front and rear second extension surface portions include an external fitting piece portion that is formed so as to continue from the main body surface portion so as to be located on the inside in the front and back direction so that the extension piece portion fits externally, and a portion that continues from the external fitting piece portion. a fitting convex portion that becomes an outer piece in the front-rear direction and fits in the fitting groove portion in contact with or substantially in contact with the fitting groove portion;
The front and rear first and second extension surfaces extend in a front-rear symmetrical manner beyond the first and second opposing surfaces to the adjacent fireproof panels in a state in which the fireproof panels are connected in a series from side to side ,
The extension of the front and rear first and second extension surfaces in the left-right direction beyond the first and second opposing surfaces does not extend beyond the joint plate material fitted into the joint grooves provided on the first and second opposing surfaces. A connected structure of fireproof panels characterized by: Claim 1, characterized in that the width from the outer side of the extending piece of the mutually opposing first extension surface parts to the inner side of the fitting groove is set to 1/4 or less of the thickness of the fireproof panel. Or the connection structure of fireproof panels according to 2. At least one of the first and second extension surfaces is bent inward in the front-rear direction from the tip edge of the inner piece in the front-rear direction of the fitting groove and/or the fitting convex portion. A clamping piece is provided between the first and second facing surfaces facing each other in a range that does not reach the central part in the front-rear direction but extends to an intermediate position. Connection structure of fireproof panels according to item 2 or 3. 5. The fire-resistant panel connection structure according to claim 4, wherein the width from the outer side of the extending piece to the inner end of the holding piece is set to 1/3 or less of the thickness of the fire-resistant panel. 2. The fireproof panel connection structure according to claim 1, wherein the holding piece is provided on the first extension surface. The extension of the front and rear first and second extension surfaces in the left-right direction beyond the first and second opposing surfaces does not extend beyond the joint plate material fitted into the joint grooves provided on the first and second opposing surfaces. The fireproof panel connection structure according to claim 1, claim 3 referring to claim 1, or claim 6, characterized in that:

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