JP7232013B2 - Fireproof structure of sliding door device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire prevention structure for a sliding door device having a door body that slides horizontally to open and close an opening.

In general, there is a door body that slides in the left-right direction to open and close an opening, and a door body that is erected on either the left or right side of the opening, and is projected into the door tail side stile of the door body in a state in which the door body closes the opening. Sliding door systems with directional overlapping meeting mullions are known. In such a sliding door device, as a fire prevention structure between the door tail side frame and the meeting block, the door tail side frame and the meeting block are inconsistent with each other when the door body is closed. Conventionally, there has been known one provided with smoke return pieces that overlap in the viewing direction (see, for example, Patent Document 1).
By the way, aluminum is widely used as a material for stiles of door frames and meeting mullions. Also, if the smoke return pieces provided on the stiles on the side of the door and on the meeting mullion are also made of an aluminum material, there is a risk that the fire prevention function will be impaired due to deformation due to heat. In addition, in Patent Document 1, a technique is disclosed in which the gap in the smoke return portion is filled with a heated foam material that expands when heated in the event of a fire or the like, but the smoke return itself seems to have been deformed by heat. In some cases, such a thermally foamed material alone may not be sufficient.
Therefore, conventionally, a technique is known in which a reinforcing material made of stainless steel having a higher melting point than that of aluminum material is provided in the rear end portion of the door body, which is formed on the stile of the door body (see, for example, Patent Document 2).

Japanese Patent No. 6154341 Japanese Patent No. 6325230

However, in Patent Document 2, although the stainless steel reinforcing material is provided to reinforce the smoke return piece (flexion piece) of the door tail side stile of the door, It is not provided to reinforce the strip (flexion strip). For this reason, if the smoke return piece of the meeting square is deformed by heat in the event of a fire or the like, the smoke and heat cannot be reliably cut off only by the smoke return piece of the stile on the door end side of the door. However, there is a problem that the fire prevention function is impaired.
In addition, the stainless steel reinforcing plate may be required to be provided so that it cannot be visually recognized from the outside in order to improve the design. ), a stainless steel reinforcing member is incorporated in the inner side, so that the stainless steel reinforcing member cannot be visually recognized from the outside. However, in Patent Document 2, in order to incorporate the stainless steel reinforcing material into the inside of the door tail side frame (joint frame), it is necessary to use a joint auxiliary material that is separate from the door tail side frame. The door trailing frame itself is also formed using two members in order to cover the fastening portion with the stainless reinforcing material. For this reason, there is also the problem that the number of parts is large and the construction takes time and effort, and these are the problems to be solved by the present invention.

SUMMARY OF THE INVENTION The present invention has been created with the aim of solving these problems in view of the actual situation as described above. 1. A sliding door device comprising a meeting bracket which is erected on either the left or right side of an opening and overlaps with a frame on the trailing edge of the door body in a prospective direction when the door body closes the opening, The door tail side stile and the meeting mullion of the body are formed of a steel material having a higher melting point than the material of the door tail side stile and the meeting mullion, and the door body smoke return member and the mullion smoke return member are provided in the door tail side stile When installing over the entire length of the banquette mullion in the vertical direction, the banquet mullion supports a wall surface that overlaps the door body in the prospective direction with the door body opening the opening on the opposite half of the opening side. A main body portion having a wall support portion is formed, and a hollow electrical component storage portion having a protruding portion protruding toward the door body than the main body portion is formed in the opening side half portion, while the electrical component storage portion is formed. The fire prevention structure of the sliding door device is characterized in that a mullioned smoke return member is attached to the projecting portion on the opposite side of the opening .
The invention of claim 2 is based on claim 1 , wherein the cubic smoke returner member faces the prospective direction, and is an attachment piece portion attached to the opposite opening side prospective surface portion of the projecting portion of the electric component storage part of the meeting mullion. and a smoke-returning piece that is bent in the viewing direction from the tip of the mounting piece, and is L-shaped.
The invention according to claim 3 is based on claim 2 , wherein the door body smoke return member faces the prospective direction, and includes an attachment piece attached to the prospective surface portion of the door tail side frame, and It is characterized by being an L-shaped one composed of a folded smoke return piece part of the cubic smoke return member and a smoke return piece part overlapping each other in the prospective direction in a state of being inconsistent with each other when the door body is closed. This is the fireproof structure of the sliding door device.
According to the invention of claim 4, in claim 3 , the inside of the door tail side stile and the meeting mullion overlap the smoke return pieces of the door body smoke return member and the mullion smoke return member in the prospective direction, The fireproof structure of the sliding door device is characterized in that a reinforcing member made of steel is provided.
The invention according to claim 5 is the invention according to any one of claims 2 to 4 , wherein a decorative plate covering the mullion smoke return member is provided, and the mullion smoke return member and the decorative plate cover the smoke return pieces of the mullion smoke return member. In a state in which the smoke return piece covering lid portion of the plate is flush with the facing surface portion of the projecting portion of the electrical component housing portion, the installation piece portion of the mullion smoke return member and the installation piece cover portion of the decorative plate covering the installation piece portion are attached to the electrical component. The fireproof structure of the sliding door device is characterized in that the sliding door device is attached to the protruded portion of the storage portion on the opposite side of the opening.

According to the invention of claim 1, high fireproof performance can be exhibited, and the mullion smoke return member can be attached using the protruding portion of the electrical component storage provided in the mullion.
According to the invention of claim 2 , the shape and structure of the cubic smoke return member are simple, and workability is excellent.
According to the invention of claim 3, the shape and structure of the door body smoke return member are simple, and workability is excellent.
By setting it as invention of Claim 4, it can contribute to the improvement of the further fireproof performance.
According to the invention of claim 5 , the mullion smoke return member and the decorative plate covering the mullion smoke return member are arranged in an excellent design by utilizing the protruding portion of the electrical component storage part provided in the meeting mullion. can be installed.

It is a front view of a sliding door apparatus. FIG. 2 is a cross-sectional view taken along the line XX of FIG. 1; FIG. 2 is a cross-sectional view taken along line YY of FIG. 1; FIG. 4 is an enlarged view of a main portion of FIG. 3;

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 denotes a sliding door device in which the fire prevention structure of the present invention is implemented. Between the meeting stand 3 erected in the middle part of the direction and either the left or right vertical frame (in this embodiment, the vertical frame on the right side in FIGS. 1 and 3) 2c The opening S provided, the door body 4 which is incorporated in the frame 2 and slides to the left and right to open and close the opening S, the meeting bracket 3 and the vertical frame on either the left or the right (in this embodiment, 1 and 3, the door body 4 is provided between the vertical frame 2b on the left side in FIGS. One of the left and right vertical frames is a vertical frame located on the door tip side of the door body 4, and the other of the left and right vertical frames is a vertical frame located on the door bottom side of the door body 4. Therefore, hereinafter, one of the left and right vertical frames will be referred to as the leading edge side vertical frame 2c, and the other left or right vertical frame will be referred to as the door trailing edge side vertical frame 2b. In the present embodiment, the door body 4 is provided so as to be positioned on the indoor side of the FIX section 5. Hereinafter, the side on which the door body 4 is positioned is the indoor side, and the FIX section 5 is positioned. Although the explanation is given assuming that the side of the vehicle is the outdoor side, it is for the sake of convenience and is not limited to this. Further, the indoor/outdoor direction in the description of the present embodiment corresponds to the perspective direction of the present invention. Further, the side of the opening S of the meeting block 3 is the front end side of the door body 4, and the opposite side of the opening S of the meeting block 3 is the bottom side of the door body 4. In the description, for the sake of convenience, the side of the opening S and the side opposite to the opening S of the meeting joist 3 are referred to as the front end side and the rear end side, respectively.

The door body 4 is an automatic hanging door, and heat-resistant glass is placed in a frame formed by an upper frame 6, a lower frame 7, a door front side frame 8, and a door bottom side frame 9 made of aluminum material. It is formed by fitting a panel body 10 (in the present embodiment, formed of wired transparent glass) made of such as. The upper edge of the panel body 10 is fixed to the lower portion of the upper frame 6 by sealing, while the upper portion of the upper frame 6 supports a hanger roller 13 via a door hanger 12 . The hanger roller 13 is guided by a horizontally elongated hanger rail 14 disposed within the upper frame 2a so as to be freely rollable in the horizontal direction. A driving device 15 is provided for laterally moving the . The door body 4 is hung from the hanger rail 14 and slides in the left-right direction based on the drive of the driving device 15 to open and close the opening S. As shown in FIG.

Further, the lower edge of the panel body 10 is fixed to the upper portion of the lower frame 7 of the door body 4 by sealing, while the lower portion of the lower frame 7 is provided with an anti-vibration body 16 protruding downward. The anti-vibration body 16 is movably guided in a guide groove 17a formed in a guide rail 17 laid between the lower ends of the left and right vertical frames 2b, 2c, thereby allowing the vibration-resting body 16 to slide. The vibration of the lower portion of the door body 4 in the indoor and outdoor directions can be suppressed.

In addition, the door tip side frame 8 of the door body 4 is provided with indoor-side and outdoor-side ridges 18 and 19 for fixing the right edge of the panel body 10 by sealing at the end on the door tail side. A door tip side adapter 20 is attached to the door tip side end portion of the door tip side frame 8 . The leading edge side adapter 20 has a tapered trapezoidal shape on the leading end side, and protrudes in the door leading direction beyond the leading edge of the door leading edge side frame 8 to which it is attached. On the other hand, the door tip side vertical frame 2c is formed with a groove portion 2f extending in the vertical direction. It has a fireproof structure in which no gap is formed between the end portion on the door tip side and the door tip side vertical frame 2c. In the drawing, reference numeral 20a denotes a cushioning material attached to the door tip side adapter 20, and 21 denotes a reinforcing member made of steel material internally mounted in the door tip side frame 8. As shown in FIG.

The trailing edge stile 9 of the door body 4 has a rectangular hollow main body 22 formed by a leading edge side projection surface portion 22a, an trailing edge side projection surface portion 22b, an indoor facing surface portion 22c, and an outdoor facing facing surface portion 22d. and a smoke return support portion 23 extending from the projected surface portion 22b on the door bottom side of the main body portion 22 toward the outside of the room (towards the side of the counter 3). On the front end surface portion 22a of the main body portion 22, rims 24 and 25 on the indoor side and the outdoor side for fixing the left edge portion of the panel body 10 by sealing are attached. Further, an engagement receiving portion 22e is formed at the interior side end portion of the door trailing edge side protruded surface portion 22b of the main body portion 22, to which a decorative plate 28, which will be described later, is engaged.

The smoke return support portion 23 of the door trailing stile 9 includes a mounting piece supporting portion 23a extending linearly toward the outdoor side from the door trailing side prospective surface portion 22b of the main body portion 22, and a tip portion of the mounting piece supporting portion 23a. A chamfered portion 23b extending obliquely from the outside toward the door edge, and a smoke return piece support portion 23c extending from the tip of the chamfered portion 23b in the door edge direction.

On the other hand, reference numeral 26 denotes a door body smoke return member made of steel. The door body smoke return member 26 faces the projection direction and is attached to the door trailing edge side projection surface portion 22b of the main body portion 22 of the door trailing edge stile 9. An L-shape consisting of a piece 26a and a smoke return piece 26b which is formed by bending from the tip of the mounting piece 26a (the end on the side of the banqueting stand 3) toward the front of the door and extending in the viewing direction. , which is provided over substantially the entire length of the door trailing stile 9 in the vertical direction. In this case, in the door body smoke return member 26, the attachment piece portion 26a faces the door bottom side projection surface portion 22b of the main body portion 22 of the door bottom side frame 9 and the attachment piece support portion 23a of the smoke return support portion 23 from the outside. The body portion is inserted from the mounting piece portion 26a in a state where the smoke return piece portion 26b contacts the smoke return piece support portion 23c of the smoke return support portion 23 in a surface contact state from the outside side. 22 is fastened to the trailing edge side stile 9 via a screw 27 screwed into the trailing edge side projection surface portion 22b of the door trailing edge side.

Furthermore, reference numeral 28 denotes a decorative plate covering the door body smoke return member 26 from the outside. It is L-shaped, which is the same shape as the door body smoke return member 26, provided with a mounting piece cover portion 28a and a smoke return piece cover portion 28b that respectively cover from the outside. An engaging portion 28c is formed at the indoor side end portion of the attachment piece cover portion 28a to engage with the engaging portion 22e formed on the door trailing end side prospective surface portion 22b of the main body portion of the door trailing end side frame 9. A tip cover portion 28d that covers the tip portion of the smoke return piece portion 26b of the door body smoke return member 26 is formed at the tip portion of the smoke return piece cover portion 28b. In the decorative plate 28, the attachment piece cover portion 28a and the smoke return piece cover portion 28b cover the attachment piece portion 26a and the smoke return piece portion 26b of the door body smoke return member 26 from the outside, respectively, and the locking portion The smoke return piece is inserted from the side of the smoke return piece cover portion 28b in a state where the 28c is engaged with the lock receiving portion 22e of the door tail side frame 9 and the tip end cover portion 28d covers the end portion of the smoke return piece portion 26b. It is fastened to the door body smoke return member 26 and the door trailing edge stile 9 via a screw 29 that passes through the portion 26b and is screwed into the smoke return piece support portion 23c of the smoke return support portion 23. there is

Further, reference numeral 30 denotes a reinforcing member made of a steel material that is internally installed in the main body portion 22 of the door trailing side frame 9. It is U-shaped and has a door end side projection surface portion 30a, an interior interior projection surface portion 30b, and an outdoor exterior projection surface portion 30c, which face the outer projection surface portion 22d from the inside. However, the indoor side face portion 30b and the outdoor side face portion 30c of the reinforcing member 30 are provided so as to overlap the smoke return piece portion 26b of the door body smoke return member 26 in the projection direction. It is The reinforcing member 30 inside the door tail side frame 9 and the reinforcing member 21 inside the door end side frame 8 are formed by attaching the upper frame 6 and the lower frame 7 to the door tail side frame 9 and the door end side frame 8. It is fixed to the upper frame 6 and the lower frame 7 via screws 31 for assembly.

On the other hand, the above-mentioned meeting joist 3 is made of an aluminum material, and a FIX panel (a wall surface of the present invention) constituting a FIX part 5 is provided on the door trailing side half (the opposite side of the opening S). , but in this embodiment, the panel support portion 32a (which corresponds to the wall support portion of the present invention) is fitted with the right edge portion of the panel support portion 32a (which is formed of wired transparent glass) and is fixed by sealing. ) is formed, and electrical components 34 such as a sensor for detecting obstacles in the opening S are installed in the door tip side half (opening S side half). 33 are formed. The main body portion 32 includes a door trailing side projected surface portion (opposite side projected surface portion) 32b, an intermediate projected surface portion 32c that separates the main body portion 32 from the electrical component housing portion 33, an indoor facing surface portion 32d, and an outdoor facing facing surface portion 32e. In addition, the panel support portion 32a is formed in a state extending from the door trailing side projected surface portion 32b to the interior side facing surface portion 32d. Further, the electrical component storage portion 33 has a protruding portion 33a that protrudes in a stepped manner toward the door body 4 from the main body portion 32. 33b (corresponding to the anti-opening side projected surface portion of the projecting portion of the electrical component of the present invention) 33b and the door tip side projected surface portion (opening side projected surface portion) 33c extending toward the , a protruding portion facing surface portion (corresponding to the facing surface portion of the protruding portion of the electrical component storage portion of the present invention) 33d that protrudes toward the door body 4 from the indoor side facing surface portion 32d of the main body portion 32; A rectangular hollow shape is formed by the surface portion 32e and the flush exterior surface portion 33e. An opening 33f to which the electrical component 34 is attached is formed in the door leading side projected surface portion 33c of the electric component housing portion 33, and a gap between the intermediate projected surface portion 32c and the projecting portion door trailing side projected surface portion 33b is formed. A pocket-like locking groove 33g is formed in the housing 33g for locking a hoisting smoke return member 35 and a decorative plate 36 covering the hoisting smoke return member 35, which will be described later.

The mullion smoke return member 35 is made of a steel material, faces the direction of projection, and is attached to the protruding part door trailing side projection surface 33b of the electrical component storage part 33 of the mullion 3, and the mounting piece 35a. The L-shaped one consists of a smoke return piece 35b that is bent toward the door bottom direction from the tip (the end on the side of the door body 4) and extends in the facing direction. It is provided over the entire length in the vertical direction. The smoke return piece 35b of the mullion smoke return member 35 is positioned at an intermediate position in the prospective direction between the main body outdoor facing surface portion 22d of the door tail side frame 9 and the smoke return piece 26b of the door body smoke return member 26, and The smoke return piece 26b of the door body smoke return member 26 is designed so as to be positioned at an intermediate position in the prospective direction between the main body indoor facing surface portion 32d of the meeting square 3 and the smoke return piece portion 35b of the smoke return member 35. As a result, when the door body 4 is closed, the smoke return pieces 26b and 35b of the door body smoke return member 26 and the mullion smoke return member 35 are inconsistent with each other and overlap in the prospective direction to form a curved path. configured to form

Further, reference numeral 36 denotes a decorative plate that covers the smoke return member 35 from the outside. It has the same L-shape as the mullion smoke return member 35 and has a mounting piece cover portion 36a and a smoke return piece cover portion 36b that cover from the side. A tip cover portion 36c that covers the tip portion of the smoke return piece portion 35b of the cubic smoke return member 35 is formed at the tip portion of the smoke return piece cover portion 36b. The smoke return member 35 and the decorative plate 36 are arranged such that the mounting piece cover portion 36a and the smoke return piece cover portion 36b of the decorative plate 36 cover the mounting piece portion 35a and the smoke return piece portion 35b of the smoke return member 35, respectively, from the outside. In a state in which the tip cover portion 36c of the decorative plate 36 covers the tip portion of the smoke return piece portion 35b, the mounting piece cover portion 36a of the decorative plate 36 is attached to the protruding portion of the electrical component storage portion 33 of the assembly rack 3. While abutting on the door trailing side projected surface portion 33b, the outdoor end of the mounting piece cover portion 36a of the decorative plate 36 and the mounting piece portion 35a of the mullion smoke return member 35 protrude from the intermediate projected surface portion 32c of the meeting mullion 3. In this state, it is inserted from the mounting piece portion 35a side of the mullion smoke return member 35 and penetrates the mounting piece cover portion 36a of the decorative plate 36. It is fixed to the meeting bracket 3 by means of a screw 37 screwed into the projecting part of the meeting bracket 3 on the side of the door bottom side projection surface 33b. In a state in which the mullion smoke return member 35 and the decorative plate 36 are fixed to the meeting mullion 3, the smoke return piece cover portion 36b of the decorative plate 36 is flush with the protruding portion fitting surface portion 33d of the electrical component housing portion 33. It is configured to have the shape of

Further, reference numeral 38 denotes a reinforcing member made of steel to be installed inside the main body portion 32 of the banquette 3. The reinforcing member 38 comprises the intermediate projected surface portion 32c, the indoor facing surface portion 32d, and the outdoor facing surface portion 32d of the main body portion 32. It is U-shaped and has a front end surface portion 38a, an interior surface portion 38b, and an exterior surface portion 38c facing the surface portion 32e. The indoor-side facing surface portion 38b and the outdoor-side facing surface portion 38c of the reinforcing member 38 are provided so as to overlap the smoke return piece portion 35b of the cubic smoke return member 35 in the projection direction. As a result, the reinforcing material 38 to be installed in the meeting block 3, the smoke return piece 35b of the block smoke return member 35, the smoke return piece 26b of the door body smoke return member 26 described above, and the door tail side stile 9 are provided. All the reinforcing members 30 to be attached are in a state of overlapping each other in the prospective direction. In addition, the reinforcement member 38 to be installed in the meeting side 3 is inserted into the electrical component storage portion 33 through an opening 33f formed in the front end surface portion 33c of the electrical component storage portion 33. It is designed to be fixed to the intermediate prospective surface portion 32c.

In the embodiment of the present invention constructed as described above, the door trailing frame 9 and the meeting bracket 3 of the door body 4 are made of the material (aluminum material) of the door trailing bracket 9 and the meeting bracket 3. The door body smoke return member 26 and the mullion smoke return member 35 formed of a steel material having a higher melting point than the door are attached over the entire length of the door trailing stile 9 and the meeting mullion 3 in the vertical direction. The body smoke return member 26 and the mullion smoke return member 35 face the direction of projection, and the projection side of the door tail side frame 9 and the meeting block 3 (the door tail side projection side face portion 22b of the main body portion 22 of the door tail side frame 9, Mounting piece portions 26a and 35a attached to the protruding portion door trailing side projected surface portion 33b) of the electrical component storage portion 33 of the fitting block 3, and the tip portions of the mounting piece portions 26a and 35a are bent in the viewing direction, When the door body 4 is closed, the smoke return pieces 26b and 35b are inconsistent with each other and overlap in the prospective direction. 35 is covered from the outside by decorative plates 28 and 36 having the same shape as the door body smoke return member 26 and the mullion smoke return member 35 .

Thus, in the present embodiment, the door smoke return member 26 and the mullion smoke return member 35 made of steel are attached over the entire length in the vertical direction of the door trailing stile 9 and the meeting mullion 3. As a result, even when exposed to high temperatures in the event of a fire or the like, the door body smoke return member 26 and the cubic smoke return member 35 can block smoke and heat in the indoor and outdoor directions in the meeting part. In this case, the door body smoke return member 26 and the cubic smoke return member 35 have an L-shape consisting of mounting pieces 26a and 35a and smoke return pieces 26b and 35b. It has a simple shape and a simple structure, and furthermore, it can be installed by a simple construction process of simply attaching the mounting pieces 26a and 35a to the stiles 9 on the side of the door and the projected surfaces of the stiles 3. . Moreover, the door body smoke return member 26 and the mullion smoke return member 35 are covered from the outside by the decorative plates 28 and 36, thereby improving the design. , the door body smoke return member 26 and the mullion smoke return member 35 have the same L-shape, the shape and structure are simple, and since they have the same shape, the door body smoke return member 26 and the mullion smoke return member 35 have the same shape. It is also easy to attach to 35 and can contribute to the improvement of workability.

Furthermore, in this device, inside the door tail side stile 9 and the meeting mullion 3, in a state in which the smoke return pieces 26a and 35a of the door body smoke return member 26 and the mullion smoke return member 35 overlap in the projection direction, Reinforcements 30, 38 of steel are provided. As a result, in the joint portion between the door trailing stile 9 and the meeting mullion 3, the smoke return pieces 26a and 35a of the door body smoke return member 26 and the mullion smoke return member 35, and the door trailing stile are made of steel. 9 and the reinforcing members 30 and 38 inside the meeting block 3 are all arranged in a state of being overlapped in the prospective direction, which contributes to further improvement of the fireproof performance.

Furthermore, in this apparatus, the FIX panel 5a which overlaps the door body 4 in the prospective direction with the door body 4 opening the opening S is provided on the door trailing side half (half on the opposite side of the opening). A body portion 32 provided with a panel support portion 32a for supporting is formed, and a protruding portion 33a that protrudes toward the door body 4 side from the body portion 32 on the door tip side half (opening side half). While the electrical component storage portion 33 is formed in the shape of a rectangular shape, a mullion smoke return member 35 is attached to the protruding portion of the electrical component storage portion 33 on the side of the door trailing edge side projection surface portion 33b. Moreover, in this case, the smoke return member 35 and the decorative plate 36 covering the smoke return member 35 are arranged such that the smoke return piece cover portion 36b of the decorative plate covering the smoke return piece portion 35b of the smoke return member 35 is the electrical component storage portion 33. The mounting piece portion 35a of the hoist smoke return member 35 and the mounting piece cover portion 36a of the decorative plate 36 covering the mounting piece portion 35a are flush with the protruding portion facing surface portion 33d. It is attached to the door trailing side projection surface portion 33b. As a result, the mulch smoke return member 35 and the decorative plate 36 are mounted using the protruding portion 33a of the electric component housing portion 33 provided in the mullion 3, and the attachment piece portion 35a of the mulch smoke return member 35 and the decorative plate 36 are attached. The fixing member (screw 37) for fixing the piece cover portion 36b to the side sill 3 is not exposed to the opening S side, and the smoke return piece cover portion 36b of the decorative plate 36 is not exposed to the electrical equipment. It is flush with the protruding portion fitting surface portion 33d of the product storage portion 33, and can be attached in a state of excellent design.

Of course, the present invention is not limited to the above-described embodiment. In the above-described embodiment, the single-opening type sliding door device provided with only one door body was exemplified, but the present invention is not limited to this. It goes without saying that the present invention can be practiced even in a sliding door device provided with a plurality of door bodies, such as a double-opening type. Further, in this embodiment, the heat foaming material that expands when heated is not provided in the smoke return portion of the door tail side stile and the meeting stile of the door body, but the heat foaming material may be appropriately disposed as necessary. may

INDUSTRIAL APPLICATION This invention can be utilized for the fireproof structure of a sliding door apparatus.

1 sliding door device 3 meeting square 4 door body 5a FIX panel 9 door bottom side frame 22b door bottom side projection surface portion 26 door body smoke return member 26a mounting piece portion 26b smoke return piece portion 28 veneer 30 reinforcing member 32 main body portion 32a Panel support portion 33 Electrical component storage portion 33a Protruding portion 33b Protruding portion door tail side projection surface portion 33d Protruding portion facing surface portion 35 Smoke return member 35a Mounting piece 35b Smoke return piece 36 Decorative plate 36a Mounting piece covering lid 36b Smoke return piece covering lid Part 38 Reinforcing material

Claims (5)

A door body that slides in the left-right direction to open and close the opening, and a door body that stands on either the left or right side of the opening and is aligned with the door bottom side frame of the door body in a state where the door body closes the opening. In a sliding door device with overlapping meeting blocks,
The door tail side stile and the meeting mullion of the door body are provided with a door body smoke return member and a mullion smoke return member formed of a steel material having a higher melting point than the material of the door tail side stile and the meeting mullion. When installing over the entire length of the vertical direction of the stile and meeting square,
The above-mentioned banquette joist is formed with a body portion provided with a wall surface support portion for supporting a wall surface which overlaps with the door body in the direction of projection when the door body opens the opening, in the half portion on the opposite side of the opening. The side half portion is formed with a hollow electrical component storage portion having a protruding portion that protrudes toward the door side from the main body portion, while a mullion smoke return member is provided on the projected surface of the electrical component storage portion protruding portion on the opposite side of the opening. A fireproof structure for a sliding door device, characterized in that it is installed. In claim 1, the mullion smoke return member is directed in the prospective direction, and includes a mounting piece attached to a prospective surface portion opposite the opening side of the projecting portion of the electric component storage section of the mulching mullion, and the mounting piece. 1. A fire prevention structure for a sliding door device, characterized in that the fire prevention structure is L-shaped and has a smoke return piece portion that is formed by bending from the front end portion toward the viewing direction. In claim 2 , the door body smoke return member is formed by bending a mounting piece portion that faces the projection direction and is attached to the projection surface portion of the door tail side frame, and the tip end portion of the mounting piece portion in the projection direction. 1. A fire prevention structure for a sliding door device, characterized in that it is an L-shaped one comprising a smoke return piece portion of a cubic smoke return member and a smoke return piece portion overlapping each other in a prospective direction in a state of being inconsistent with each other in the closed state of (1). In claim 3 , a reinforcing member made of steel is provided in the inside of the door tail side frame and the meeting mullion so as to overlap the smoke return pieces of the door body smoke return member and the mullion smoke return member in the projection direction. A fireproof structure for a sliding door device, characterized in that: 5. A method according to any one of claims 2 to 4 , wherein a decorative plate covering the mullion smoke return member is provided, and the mulch smoke return member and the decorative plate are a smoke return cover lid portion of the decorative plate covering the smoke return portion of the mulch smoke return member. is flush with the facing surface of the protruding portion of the electrical component storage portion, the mounting piece portion of the cubic smoke return member and the mounting piece cover portion of the decorative plate covering the mounting piece portion are opposite to the opening of the protruding portion of the electrical component storage portion. A fireproof structure for a sliding door device, characterized in that it is attached to a part-side prospective surface part.

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