JP6128889B2 - Fire protection structure of window shutter bottom frame - Google Patents

Description

The present invention relates to a fire prevention structure for a lower frame of a window shutter.

The window shutter device is attached to the outer wall W of the building so as to open and close the space outside the window device. When the window opening is closed by the shutter, the window shutter device is made of metal in the left and right metal guide rails. Both ends of the shutter curtain in the width direction are received, and the metal seat plate at the lower end of the shutter curtain is not in contact with the metal lower frame in a manner that does not form a linear through gap in the indoor / outdoor direction. They are close to each other and inherently have a predetermined fire prevention performance.

However, in order to ensure a longer evacuation time and to prevent the spread of fire as much as possible, it is desirable to maintain the fireproof performance for a longer time. The present inventors have considered improving the fire prevention performance of the window shutter by improving the fire prevention performance of the lower part of the window opening portion closed by the window shutter, particularly the lower frame (draining plate).

Although what provided the reinforcing material and the structural material in the draining board of the window shutter is described in patent documents 1-3, there is no viewpoint of improving the fire prevention performance of the draining board.
Japanese Utility Model 05-52009 JP2007-146537 JP2008-75293

The object of the present invention is to improve the fireproof performance of the lower frame of the window shutter.

The technical means adopted by the present invention is that the lower frame of the window shutter includes a recess for receiving a lower part of the seat plate at the lower end of the shutter curtain in a fully closed state of the window curtain, a draining surface located on the indoor side of the recess, A lower side that is spaced apart below the surface,
The lower frame is provided with a reinforcing plate material made of a material having a melting point higher than that of the material forming the lower frame, and the reinforcing plate material has a rising edge along the rising edge on the outdoor side of the recess, A bottom side along the bottom side and a lower side along the lower surface of the lower side of the lower frame, and in the fully closed state of the window opening, facing the outdoor side of the lower part of the seat plate, And the rising edge of the reinforcing plate is located,
The lower ends of the left and right side frames of the window shutter are close to the draining surface, and the lower side of the reinforcing plate is connected to the lower end portion of the side frame by a screw penetrating the draining surface and the lower side of the lower frame. Yes,
It is a fire prevention structure of the lower frame of the window shutter.

In one aspect, a connection plate material formed of a material having a melting point higher than that of the material forming the lower frame is fixed to a lower end portion of the side frame, and the lower frame and the reinforcing plate material are the connection plate material. It is connected to the lower end part of the side frame via.
In one aspect, the connecting member includes a vertical piece fixed to the side frame, and a horizontal piece extending close to the upper side of the draining surface, and the screw includes the horizontal piece of the connecting member and the reinforcement. The lower side of the member is connected, and the draining surface and the lower side of the lower frame, which are located between the horizontal piece and the lower side of the reinforcing member, are penetrated.

In one aspect, the bottom side and the lower side of the reinforcing plate member are formed from a common element (for example, the bottom side 90 in an embodiment described later). In this case, the bottom side of the recess of the lower frame and the lower side spaced below the draining surface extend horizontally at substantially the same height.
For example, if the height position of the lower side of the lower frame is located above the bottom side of the recess, the reinforcing plate material should be designed to have a lower side that follows the lower surface of the lower side of the lower frame. Will be understood by those skilled in the art. In this case, the bottom side and the bottom side of the reinforcing plate are formed from different sides.
In one aspect, the said side frame consists of a guide rail and a guide rail base frame, and the said lower frame and the said reinforcement board | plate material are connected with the lower end part of the said guide rail base frame.
In one aspect, the lower frame includes an indoor side surface portion (first vertical portion 650 in the embodiment described later) located on the indoor side of the draining surface,
The reinforcing plate member includes an indoor rising edge (in an embodiment described later, an indoor vertical side 92) that comes into contact with the indoor side surface portion,
The reinforcing plate members are connected by screws (screws 93 in the embodiment described later) with the indoor side rising side abutting against the indoor side surface portion.

In one aspect, the upper end of the rising edge of the lower frame is formed with a locking piece formed in a folded shape inside,
The rising side of the reinforcing member extends along the inner surface of the rising side of the lower frame, and a locking piece at the upper end of the rising side of the lower frame is locked to the upper end portion of the rising side of the reinforcing member. Has been.
By doing so, the rising side of the reinforcing member regulates thermal deformation such that the rising side of the lower frame falls to the outdoor side.
In the case where the upper edge of the rising edge of the lower frame is locked to the upper edge of the rising edge of the reinforcing plate, the rising edge of the lower frame is reinforced against deformation outside the room without connecting the rising edges. The rising edge of the plate material is regulated. The rising edge of the reinforcing plate is located on the inner surface of the rising edge outside the outdoor portion of the recess, and it is not necessary to connect the rising edges with screws or the like, so that the appearance of the lower frame is not impaired.
Alternatively, in another aspect, by connecting the rising edge of the reinforcing member to the rising edge of the lower frame, the rising edge of the reinforcing member regulates deformation that falls to the outdoor side of the rising edge of the lower frame. Also good.
Alternatively, by providing the reinforcing plate so that the rising side of the reinforcing member comes into contact with the outer surface of the rising side of the lower frame, the rising side of the reinforcing member regulates deformation that falls to the outside of the rising side of the lower frame. You may do it.
In one aspect, the bottom side of the reinforcing plate extends horizontally along the lower surface of the bottom side of the recess of the lower frame,
The rising side of the reinforcing plate extends perpendicularly along the inner surface of the rising side of the lower frame through the outdoor side end of the bottom side of the lower frame.
In this case, an opening groove is formed on the bottom side of the lower frame, the rising side of the reinforcing plate material is inserted into the opening groove from the lower side of the lower frame, and the upper end of the rising side is inserted into the groove part formed by the locking piece. In addition, since the bottoms only need to be brought into contact with each other, it is easy to attach the reinforcing plate to the lower frame.
In one aspect, the dimension of the reinforcing plate member in the opening width direction is shorter than the dimension of the lower frame in the opening width direction, and a plurality of reinforcing plate members are spaced from each other in the opening width direction in the lower frame. It is provided. In this case, in the fully closed state of the window opening, the rising side of the reinforcing plate member is located across the length of the seat plate, facing the outside of the lower part of the seat plate.
In the case where the rising side of the reinforcing plate penetrates the outdoor side end of the bottom side, an opening groove is formed in advance in the opening width direction on the bottom side of the lower frame.
The rising side of the reinforcing plate material may be formed from a long portion extending over substantially the entire width of the opening.

In the present invention, since the rising side of the reinforcing plate material is located facing the outdoor side of the lower portion of the seat plate, the seat plate is thermally deformed by the heat at the time of the fire in the fully closed state of the window opening, Although there is a risk of displacement so as to be lifted to the outside of the room, displacement of the lower part of the seat plate toward the outdoor side is restricted by the lower part of the seat plate that is about to be displaced to the outer side coming into contact with the rising edge of the reinforcing plate. Thus, it is possible to prevent a disadvantageous fire prevention from occurring between the rising edge of the lower frame and the lower part of the seat plate due to thermal deformation of the seat plate.
In the present invention, the rising edge of the lower frame, which is easily deformed so as to fall to the outside of the room due to the influence of heat at the time of the fire, is reinforced by the reinforcing plate material that has better fire resistance than the rising edge, so the heat at the time of the fire This prevents the rising edge of the lower frame from falling outside the room and forming a disadvantageous space for fire and smoke prevention that penetrates the interior and exterior between the rising edge and the lower part of the seat plate.
In the present invention, the lower side of the reinforcing plate material is connected to the lower end portion of the side frame of the window shutter by a screw extending through the draining surface and the lower side of the lower frame, and by connecting the reinforcing plate material and the side frame, The lower frame in the meantime is supported or suspended by the side frame to prevent thermal deformation of the lower frame due to heat during a fire (for example, thermal deformation and drooping outside or falling down). Further, by connecting the reinforcing plate member and the side frame, the side frame (for example, the guide rail base frame) is prevented from being lifted by thermal deformation as much as possible.

It is the schematic front view and side view of a window shutter apparatus. It is a longitudinal cross-sectional view of a window shutter apparatus. FIG. 5 is a partially omitted cross-sectional view of the window shutter device. It is the elements on larger scale of the lower part of FIG. It is a figure which shows a lower frame single-piece | unit, and is a side view, a top view, the figure seen from the room inner side, and a bottom view in order from the top. It is a figure which shows a lower frame assembly, and is a side view, a top view, the figure seen from the indoor side, and a bottom view in order from the top. In addition, in the top view and the figure seen from the indoor side, the reinforcement board material located in the inside of a lower frame is shown as the continuous line for convenience. It is a figure which shows the reinforcement member of a lower frame. It is a partial side view which shows the attachment structure of a lower frame. It is a fragmentary top view which shows the attachment structure of a lower frame. It is a figure which shows the structure of a latch hook.

In FIG. 1, the left figure is a front view of the window shutter device viewed from the outdoor side, and the right figure is a side view of the window shutter device. FIG. 2 is a longitudinal sectional view of the window shutter device, and the window shutter device is provided on the outdoor side of the window device installed in the window opening of the building. The window shutter device is located above the window opening and is attached to the outer wall W in a take-out manner, and is located on both sides in the width direction of the window opening and attached to the window device in a take-out manner. The left and right guide rail base frames 2, the left and right guide rails 3 supported by the left and right guide rail base frames 2, the winding shaft 4 provided in the shutter case 1, and the upper end are connected to the winding shaft 4. And a shutter curtain 5 that opens and closes the outdoor portion of the window opening by being wound up / rolled out by the winding shaft 4 while being guided by the guide rail 3 at both ends in the width direction, and the window opening And a lower frame (draining plate) 6 attached to the window device in a take-out shape. The window shutter device may be a so-called sash-integrated window shutter. In this case, the frame of the window sash constitutes the guide rail base frame, and the outdoor portion of the lower frame of the window sash constitutes the lower frame (draining plate) of the window shutter. In the present specification, the expressions “outside of room” and “inside of room” mean not only the actual outside of room and inside of room but also used to specify the relative position of components. Please note that.

The guide rail 3 is a long member extending perpendicularly to the height direction of the window opening, and is seen in plan view from the side 30, the side 31 positioned on the outdoor side with respect to the side 30, and the bottom 32. It has a substantially U-shape. A guide groove is formed between the opposing sides 30 and 31 to receive both ends in the width direction of the shutter curtain 5 and guide it in the vertical direction. The guide rail 3 has a height corresponding to the overall height of the opening, and extends vertically from the upper side 60 of the lower frame 6 until reaching the shutter case 1. The upper end portion of the guide rail 3 is formed in an expanded shape and extends into the lower portion of the shutter case 1. As shown in FIG. 9, a mounting piece 33 extends from the side 30 of the guide rail 3 toward the indoor side, and the bottom of the side 31 extends beyond the bottom 32 and extends. An attachment piece 34 is formed on a bent side 310 formed by bending the leading end of the protruding portion toward the indoor side.

The guide rail base frame 2 is formed of an aluminum mold, is a long member extending perpendicularly to the height direction of the window opening, has a height corresponding to the entire height of the opening, and has an upper side 60 of the lower frame 6. To the shutter case 1 to extend vertically. As shown in FIG. 9, the guide rail base frame 2 includes a base 20 on the indoor side, a side 21 extending from one end of the base 20 (side close to the opening) toward the outdoor side, and the other end of the base 20 ( And a side 22 extending from the side far from the opening) toward the outdoor side. Mounting pieces 23 and 24 to be attached to the mounting pieces 33 and 34 of the guide rail 3 are formed at the tip portions of the side sides 21 and 22. The mounting pieces 33 and 34 of the guide rail 3 are respectively connected to the guide rails. The guide rail 3 is attached to the distal end side of the guide rail base frame 2 by being attached to the mounting pieces 23 and 24 of the base frame 2. In the illustrated embodiment, the mounting piece 34 of the guide rail 3 and the mounting piece 34 of the guide rail 3 are attached in a state where the mounting piece 34 of the guide rail 3 is slidably locked to the mounting piece 24 of the guide rail base frame 2 from the length direction. The pieces 23 are brought into contact with each other and overlapped and fixed with screws 35.

As shown in FIGS. 3 and 10, a reinforcing plate 7 is provided along the inner wall in the internal space of the guide rail 3 to improve the fire resistance performance of the guide rail 3 formed of an aluminum mold. The reinforcing plate 7 is a long member that is formed of a metal plate having a higher melting point than aluminum, such as a steel plate, and extends perpendicularly to the height direction of the window opening. As shown in FIG. 3, the inner surface of the side 30 of the guide rail 3 may accommodate a flame-retardant thermal expansion refractory member 8 that is positioned on the opening side of the internal space and extends in the height direction.

As shown in FIG. 1, the shutter curtain 5 is formed by connecting long plate-like slats 50 having a predetermined height and extending in the opening width direction so as to be rotatable in the height direction. . An upper end of the shutter curtain 5 is connected to the winding shaft 4, and a seat plate 51 is provided at the lower end portion of the shutter curtain 5. In FIG. 2, the upper seat plate 51 indicates the height position when the window opening is fully opened, and the lower seat plate 51 indicates the height position when the window opening is fully closed. When the window opening is fully open, the shutter curtain 5 is wound around the winding shaft 4. A stopper 515 provided on the outdoor side of the seat plate 51 contacts the lintel 515A above the opening. When the window opening is fully closed, the lower end of the seat plate 51 contacts the bottom 62 of the recess 600 of the lower frame 6 (see FIG. 4). The slat 50 has a width dimension such that both ends in the length direction extend into the internal space of the guide rail 3, and when the shutter curtain 5 is raised and lowered and when the window opening is fully closed, both end portions in the width direction of the slat 50 are provided. Is received in the internal space of the guide rail 3.

As shown in FIG. 10, a latch hook 15 is provided at a lower portion on the bottom side of the inner space of the guide rail 3 so that a latch L protruding from both ends in the length direction of the seat plate 51 contacts from below. The latch hook 15 is formed by bending a steel plate, and includes a contact piece 150 positioned immediately above the latch L in a locked state and a cover piece 151 positioned below the latch L, and includes a rivet 152. Is fixed to the side 30 of the guide rail 3. The cover piece 151 improves crime prevention by countering attacks from below in the window opening portion closed state, and suppresses blowing of hot air and flame from below during a fire.

As shown in FIG. 4, the seat plate 51 includes a long and vertical plate-like portion 510 extending in the width direction of the window opening, and the upper end of the plate-like portion 510 is engaged with the lower end of the slat 50 directly above. A mating engaging portion 511 is integrally formed, and a lower end portion of the plate-like portion 510 is curved inward to form an abutting portion 512. An indoor side piece 513 extending in the width direction of the plate-like portion 510 is formed in the lower half portion of the plate-like portion 510 of the guide rail 51. The indoor side piece 513 has an L shape in side view from a first piece 5130 that extends horizontally from the indoor side surface toward the indoor side and a second piece 5131 that hangs down from the tip of the first piece 5130. The lower end of the second piece 5131 is thicker than other portions of the indoor side piece 513 and has a curved surface as a whole. Both ends of the indoor side piece 513 in the length direction (width direction of the plate-like portion 510) are cut out so as to be received in the internal space of the guide rail 3. A pocket portion is formed in the indoor side surface portion of the plate-like portion 510 so as to be positioned below the indoor side piece 513. In one aspect, the pocket part accommodates a flame-retardant thermal expansion fire-resistant member (not shown) extending in the length direction of the seat plate 51.

A latch bar accommodating portion 514 is formed on the indoor side surface portion of the plate-like portion 510 and is positioned above the indoor-side piece 513 and extends horizontally over the length direction of the seat plate 51 (plate-like portion 510). The two latch bars are accommodated in the latch bar accommodating portion 514 so as to be movable in the length direction. FIG. 10 shows the latch L at the tip of the latch bar in the protruding posture. A stopper 515 is provided on the outdoor side surface portion of the plate-like portion 510 at both ends in the width direction and outside the guide rail 3, and when the opening is opened, the horizontal upper surface of the stopper 515 is above the opening. It abuts on the head portion 515A.

The lower frame 6 of the window shutter is a long frame extending horizontally in the width direction of the opening, and extends below the guide rail base frame 2 and the guide rail 3 beyond the entire width of the window opening. . As shown in FIG. 5, the lower frame 6 includes a hollow indoor side portion having an upper side 60 that forms a draining surface, and a recessed portion 600 formed on the outdoor side with respect to the hollow indoor side portion. Have. The recess 600 is located immediately below the lifting path of the shutter curtain 5 and reaches the lower part of the guide rail 3 beyond the entire width of the window opening. In the recess 600, the lower part of the seat plate 51 at the lower end of the shutter curtain 5 is received when the window opening is fully closed. As shown in FIG. 4, a portion of the plate-like portion 510 of the seat plate 51 that is lower than the indoor side piece 513 extends into the recess 600 when the window opening is fully closed. Since the lower part of the seat plate 51 is received in the recess 600, even if a gap is formed between the lower end of the seat plate 51 and the bottom surface of the recess 600, a space that linearly communicates with the indoor side is formed. Not.

More specifically, as shown in FIG. 5, the lower frame 6 includes an upper side 60 that extends gently downward toward the outdoor side, an indoor vertical side 61 that hangs down from the tip of the upper side 60, and an indoor side A bottom 62 extending gently downward and downward from the lower end of the vertical side 61 toward the outdoor side, an outdoor vertical side 63 rising vertically from the outdoor front end of the base 62, and an indoor side from the lower end of the indoor vertical side 61 A lower side 64 extending horizontally, a rear side 65 connecting the upper side 60 and the indoor side ends of the lower side 64, and a mounting piece 66 formed extending from the rear side 65 to the indoor side. In the present embodiment, the outdoor vertical side 63 forms a rising side of the concave portion 600 on the outdoor side. The rear side 65 is formed in a stepped shape from a first vertical portion 650 on the outdoor side and a second vertical portion 651 on the indoor side. Both ends of the mounting piece 66 in the length direction do not reach the end in the length direction of the lower frame 6, and do not extend to a portion located below the guide rail base frame 2. Holes 60 </ b> A and 64 </ b> A for the screw 13 are formed on both ends of the upper side 60 and the lower side 64 in the length direction.

The upper part of the space between the indoor vertical side 61 and the outdoor vertical side 63 is open, and a recess 600 is formed from the outdoor vertical side 63, the indoor vertical side 61, and the bottom 62. ing. A hollow indoor side portion is formed from the upper side 60, the indoor side vertical side 61, the lower side 64, and the rear side 65. The rising dimension of the outdoor vertical side 63 is larger than the rising dimension of the indoor vertical side 61, that is, the height position of the upper side 60 of the indoor hollow portion is higher than the height position of the upper end of the outdoor vertical side 63. It is in a low position.

A reinforcing plate 9 is provided on the lower frame 6. The reinforcing plate 9 is made of a metal plate having a higher melting point than aluminum, for example, a steel plate. In the illustrated embodiment, as shown in FIG. 6, a plurality of reinforcing plate members 9 are arranged at intervals along the length direction (opening width direction) of the lower frame 6. You may provide a reinforcement board material over the whole length.

As shown in FIGS. 6 and 7, the reinforcing plate 9 includes a bottom 90 extending horizontally along the bottom surface 62 of the lower frame 6 and the lower surface of the lower side 64 in the expected direction (inside and outside) of the lower frame 6, and the bottom 90 From the outdoor end of the bottom frame 6 vertically extending along the outdoor vertical side 63 of the lower frame 6, from the outdoor vertical side 91 located on the indoor side of the outdoor vertical side, and from the indoor side end of the bottom 90 And a room-side vertical side 92 extending in a rising manner along the first vertical portion 650 of the rear side 65 of the lower frame 6. In the present embodiment, the outdoor vertical side 91 forms a rising side along the outdoor rising side (outdoor vertical side 63) of the recess 600. The height dimension of the outdoor vertical side 91 is larger than the height dimension of the indoor vertical side 92. The indoor side half of the bottom side 90 of the reinforcing plate 9 is in contact with the lower surface of the lower side 64 of the lower frame 6. A hole 920 for a screw 93 is formed in the indoor vertical side 92, and the indoor vertical side 92 abuts on the indoor side surface of the first vertical portion 650 of the rear side 65 of the lower frame 6, It is connected. Thus, by fastening the lower frame 6 and the reinforcing plate 9 with the screw 93 from the indoor side on the opposite side (indoor side) of the flame, the connecting portion of the lower frame 6 and the reinforcing plate 9 is not easily affected by the flame. Moreover, since the screw 93 is in an inconspicuous position, the design is good. In addition, the connection part of the lower frame 6 and the reinforcement board | plate material 9 is not limited to this, For example, you may connect the base 90 of the reinforcement board | plate material 9 and the lower side 64 of the lower frame 6 with a screw from the lower side.

As shown in FIG. 5, a predetermined width dimension corresponding to the width dimension and the sheet thickness dimension of the reinforcing plate 9 is received at the outdoor end of the base 62 so that the outdoor vertical side 91 of the reinforcing plate 9 can be received. An opening groove 620 having a groove width is formed, and the outdoor vertical side 91 of the reinforcing plate 9 extends upward along the inner surface of the outdoor vertical side 63 of the lower frame 6 through the opening groove 620. The upper end of the reinforcing plate 9 is received in a downwardly open groove formed by an upper portion of the outdoor vertical side 63 and a folded piece (consisting of a horizontal piece 630 and a vertical piece 631).

As shown in FIG. 4, in the fully closed state of the window opening, the outdoor vertical side 91 of the reinforcing plate 9 is positioned facing the outdoor side of the lower portion of the plate-like portion 510 of the seat plate 51. In the present embodiment, the plurality of reinforcing plate members 9 are provided at intervals in the opening width direction, and the plurality of outdoor vertical sides 91 are equally spaced over the length direction of the plate-like portion 510 of the seat plate 51. It comes to oppose at.

As shown in FIG. 6, covers 10 are attached to both ends in the length direction of the lower frame 6. The cover 10 includes a surface portion 100 corresponding to the side surface shape of the lower frame 6, an upper edge 101 and an outdoor edge portion 101 of the surface portion 100, and a fitting piece 102 extending into a hollow portion of the lower frame 6. The fitting piece 102 is fixed to the upper side 60 of the lower frame 6.

As shown in FIG. 4, the lower frame 6 is connected to the lower end portion of the guide rail base frame 2 and the lower frame 16 of the window device. This will be described more specifically. On the lower frame 16 of the window device, a locked portion 160 of the mounting piece 66 of the lower frame 6 is formed, and the mounting piece 66 of the lower frame 6 is engaged with the locked portion 160 of the lower frame 16 of the window device. The mounting piece 66 and the lower frame 16 of the window device are connected by the screw 14 in a stopped state. Here, the configuration in which the lower frame 6 is connected to the lower frame 16 of the window device is shown, but depending on the fit of the lower frame, it may be fixed to the outer wall with screws. Alternatively, the lower frame 6 may be formed integrally with the lower frame 16 of the window device. It should be noted that the elements of the lower frame 6 of the window shutter device and the elements of the lower frame 16 of the window device may be brought into contact with each other without being engaged or engaged with each other and screwed together.

As shown in FIGS. 4, 8, and 9, in the illustrated embodiment, the lower frame 6 is connected to the lower end portion of the guide rail base frame 2 via a connecting plate 11 fixed to the lower end portion of the guide rail base frame 2. It is connected to. The connecting plate material 11 is made of, for example, a steel plate. The connecting plate member 11 has an L shape in a side view from the vertical piece 110 and the horizontal piece 111, and is fixed to the inner surface of the bottom side 20 of the guide rail base frame 2 with the rivet 12 via the vertical piece 110. The horizontal side 111 of the connecting plate member 11 extends to the outdoor side in the vicinity of the upper side 60 of the lower frame 6, and the horizontal side 111 of the connecting plate member 11 is connected to both ends in the length direction of the upper side 60 of the lower frame 6 by the screws 13. The holes 60A of the lower part 64 and the holes 64A at both ends in the length direction of the lower side 64 are inserted and fixed to the screw holes 900 on the bottom side 90 of the reinforcing plate 9 arranged at both ends in the length direction of the lower frame 6. By connecting both ends in the length direction of the lower frame 6 (upper side 60, lower side 64) together with the reinforcing plate material 9 (bottom side 90) to the lower end portion of the guide rail base frame 2 by the connecting plate material 11, the heat of the lower frame 6 is obtained. Deformation (for example, thermal deformation and drooping to the outdoor side) is prevented.

As shown in FIGS. 4 and 8, the side frames of the window shutter, that is, the lower ends of the guide rail base frame 2 and the guide rail 3 extend below the upper end of the outdoor vertical side 63 and reach the upper side 60. Has reached. The outdoor side of the side frame (side 31 of the guide rail 3) is in contact with or close to the outdoor vertical side 63 of the lower frame 6, and the indoor side of the side frame (bottom side 20 of the guide rail base frame 2) is the bottom side. 20 is in contact with the lower frame 16 of the window device via an abutment projection 200 projecting from the side of the room. That is, the lower end portion of the side frame is only inserted into the lower frame 6 and is accommodated so as to be sandwiched from the inside and outside of the room. By comprising in this way, the clearance gap between the lower end part of a side frame and the lower frame 6 is lose | eliminated, crime prevention and design property improve, and it suppresses that the groove part of the guide rail 3 opens by the heating at the time of a fire.

As shown in FIG. 4, the reinforcing plate 9 faces the outdoor side of the lower portion of the plate-like portion 510 of the seat plate 51 and extends in the length direction of the seat plate 51 in the fully closed state of the window opening. The outdoor vertical side 91 is located. When the window opening is fully closed, the seat plate 51 may be thermally deformed by heat at the time of a fire and may be displaced so as to be lifted to the outside of the room. By abutting on the outdoor vertical side 91 of the plate member 9, the displacement of the lower part of the seat plate 51 to the outdoor side is restricted, and due to the thermal deformation of the seat plate 51, it is between the concave part 600 and the lower part of the seat plate 51. Preventing disadvantageous gaps in fire prevention.

When a fire occurs on the outdoor side with the window opening fully closed, the outdoor vertical side 63 of the lower frame 6 may be drooped and deformed so as to fall down to the outdoor side due to heat. In the present embodiment, the outdoor vertical side 91 of the L-shaped reinforcing plate 9 in side view extends along the entire height of the outdoor vertical side 63 of the lower frame 6, and the outdoor vertical side 63 of the lower frame 6 extends. The upper end is locked to the upper end of the outdoor vertical side 91 by folded pieces (horizontal piece 630 and vertical piece 631). Accordingly, even when the outdoor vertical side 63 of the lower frame 6 is deformed so as to hang down to the outdoor side due to heat, such deformation is restricted by the outdoor vertical side 91 of the reinforcing plate 9.

The screw 13 connecting the lower frame 6 and the lower end portion of the guide rail base frame 2 passes through the upper side 60 and the lower side 64 of the lower frame 6 and is fixed to the bottom side 90 of the reinforcing plate 9. The screw 13 connects the horizontal piece 111 of the connecting plate member 11 and the bottom side 90 of the reinforcing plate member 9, and is held so that the upper side 60 and the lower side 64 of the lower frame 6 are sandwiched therebetween. By adopting such a connection structure, thermal deformation of the lower frame 6 (particularly, the end in the opening width direction) due to heat at the time of a fire (for example, thermal deformation and drooping outside or falling down) To prevent. Moreover, the floating etc. by the thermal deformation of the guide rail base frame 2 are prevented as much as possible.

2 Guide rail base frame 3 Guide rail 6 Lower frame 60 Upper side 61 Indoor side vertical side 62 Bottom side 63 Outdoor side vertical side 64 Bottom side 9 Reinforcement plate material 90 Bottom side 91 Outdoor side vertical side 92 Indoor side vertical side 11 Connecting plate material 13 Screw

Claims (2)

The lower frame of the window shutter is located in a state where the window opening is in a fully closed state, a recess that receives a lower portion of the seat plate at the lower end of the shutter curtain, a draining surface that is located on the indoor side of the recess, and a space below the draining surface. A lower side, and
The lower frame is provided with a reinforcing plate material made of a material having a melting point higher than that of the material forming the lower frame, and the reinforcing plate material has a rising edge along the rising edge on the outdoor side of the recess, A bottom side along the bottom side and a lower side along the lower surface of the lower side of the lower frame, and in the fully closed state of the window opening, facing the outdoor side of the lower part of the seat plate, And the rising edge of the reinforcing plate is located,
The lower ends of the left and right side frames of the window shutter are close to the draining surface, and a connecting plate material made of a material having a higher melting point than the material forming the lower frame is fixed to the lower end portion of the side frame. And the lower side of the reinforcing plate is connected to the connecting plate by a screw that penetrates the draining surface and the lower side of the lower frame,
Fireproof structure of the lower frame of the window shutter. The connecting member includes a vertical piece fixed to the side frame, and a horizontal piece extending close to the upper side of the draining surface, and the screw includes the horizontal piece of the connecting member and the lower side of the reinforcing member. ligated and fire retarding structures windowsill shutters according to the draining surface and lower sides of the lower frame are formed through, in claim 1 which is located between the lower side of the reinforcing member and the horizontal plate.

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