JP2020020202A - Fire preventive construction of shutter frame - Google Patents

Abstract

To provide a fire preventive construction of a shutter frame that can improve fireproof performance of a shutter while securing crime prevention performance in normal use.SOLUTION: A fire preventive construction of a shutter frame comprises: a shutter curtain for ascending or descending in an opening 13 and having a back plate at the end of descent; a pair of aluminum outer frames 23 for supporting each of a pair of guide rails into which a side part of the shutter curtain is inserted to be guided to be elevated and lowered and for extending along the guide rails; an aluminum lower frame 25 formed long over each bottom edge of the pair of outer frames 23 and having a rear edge part 49 supported by an external wall; a connecting fixation member 27 fixed to the inside of an outside plate part 53 at the bottom edge of the outer frame 23; a resin cap 29 fixed to the undersides of both side ends in the longer direction of the lower frame 25; and a fixing screw 31 that is inserted into the connecting fixation member 27 from above to penetrate through the lower frame 25 and that connects the bottom edge of the outer frame 23 with the end of the lower frame 25 by being screwed and fastened to the cap 29.SELECTED DRAWING: Figure 2

Description

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

  The window shutter is attached to the outer wall so as to cover the window opening to the building frame. In a window shutter, a component made of aluminum or an aluminum alloy or a component made of a resin is frequently used in consideration of rust prevention and design. For example, in a window shutter disclosed in Patent Literature 1, a shutter body is mounted above a window, and outer frames are mounted on left and right sides of the shutter body so as to sandwich the window. A guide rail is fixed inside each outer frame. From the shutter body, the shutter curtain is pulled out along the guide rail. The window shutters are connected by a lower frame whose left and right outer frame lower ends are horizontally arranged below the window. The lower frame is fixed to the building frame at a predetermined horizontal interval, and both ends in the horizontal direction are connected and fixed to lower ends of left and right outer frames. The outer frame and the lower frame are constituent members of the shutter frame.

JP 2014-31635 A

  However, when the shutter frame receives a flame, each member expands due to the heat. When both ends of the lower frame are fastened and fixed to the lower ends of the left and right outer frames, when the lower frame expands and extends in the longitudinal extension direction, the outer frame is urged to open outward. . When the outer frame of the shutter curtain opens outward, there is no guide support portion on the side, and the slat may come off. On the other hand, when the lower frame and the outer frame are not fastened to each other, the shutter frame portion is disadvantageous in terms of security such as prying-up during normal use.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fire prevention structure of a shutter frame portion that can improve fire prevention performance of a shutter while securing security performance during normal use. .

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The fire prevention structure of the shutter frame portion according to claim 1 of the present invention, the shutter curtain 21 having an opening 13 opening to the outer wall 15 ascending and descending outside the outer wall 15 and having a seat plate 35 at a lower end,
An outer plate 53 extending along the guide rails 39 and perpendicular to the outer wall 15 while supporting each of a pair of guide rails 39 for guiding the ascending and descending by inserting the side portions 37 of the shutter curtain 21. A pair of aluminum outer frames 23 having a mounting plate portion 55 bent from the outer plate portion 53 in parallel with the outer wall 15,
An aluminum lower frame that is formed in a long shape extending over the lower ends of the pair of outer frames 23 and that has a rear edge 49 on the outer wall side of a pair of longitudinally parallel edges supported by the outer wall 15. 25,
A connection fixing member 27 fixed to the inside of the outer plate portion 53 at the lower end of the outer frame 23;
A resin cap 29 fixed to the lower surface of both ends in the longitudinal direction of the lower frame 25,
A fixing means 31 that is inserted into the connection fixing member 27 from above and penetrates the lower frame 25 and is fixed to the cap 29 to connect a lower end of the outer frame 23 and an end of the lower frame 25;
It is characterized by having.

In the fire prevention structure of the shutter frame portion, a resin cap 29 is fixed to the lower surface of both ends in the longitudinal direction of the lower frame 25. The connection fixing member 27 is fixed inside the outer plate portion 53 of the pair of outer frames 23 each supporting the guide rail 39. A fixing means 31 such as a fixing screw is inserted into the connection fixing member 27 from above. The fixing screw 31 inserted through the connection fixing member 27 penetrates the lower frame 25, and is screwed and fixed to a cap 29 disposed on the opposite side of the lower frame 25 from the connection fixing member 27. That is, the end of the lower frame 25 is fastened by the fixing screw 31 sandwiched between the connection fixing member 27 and the cap 29. Thus, the end of the lower frame 25 is securely fixed to the outer frame 23 and cannot be easily pry open.
When the shutter frame portion 41 is exposed to a flame during a fire, the lower frame 25 expands. Since the lower frame 25 is made of an aluminum member having a larger coefficient of linear expansion than a steel member, both ends in the longitudinal direction are displaced outward on an extension line. Both ends of the lower frame 25 are connected and fixed to lower ends of the outer frames 23 on both sides by fixing screws 31. Therefore, when the lower frame 25 extends, the pair of outer frames 23 tends to open in a direction in which the lower ends are separated from each other. At this time, in the resin cap 29 whose melting temperature is sufficiently lower than that of the aluminum member, the screwed portion with the fixing screw 31 is softened and melted, and the screwing with the fixing screw 31 is released. The lower frame 25 that has lost the support by the fixing screw 31 moves down together with the cap 29 and separates from the fixing screw 31 by its own load. The end of the lower frame 25 detached from the fixing screw 31 becomes a free end, and can extend (displace) outward on an extension line. Since the pair of outer frames 23 is disconnected from the end of the lower frame 25, the outer frames 23 do not open outward even when the lower frame 25 expands. As a result, the slat 33 does not come off.

The fireproof structure of the shutter frame according to claim 2 of the present invention is the fireproof structure of the shutter frame according to claim 1,
The connection fixing member 27 is provided at a protruding end of the outer plate portion 53 opposite to the mounting plate portion 55.

  In the fire prevention structure of the shutter frame portion, the connection fixing members 27 that support both ends in the longitudinal direction of the lower frame 25 are provided at the protruding ends of the outer plate portion 53. That is, in the lower frame 25, the front edge 97, which is the other edge opposite to the outer wall 15 side, is supported by the connection fixing member 27. When the cap 29 is softened and melted by the flame due to the flame and the screwing with the fixing screw 31 as the fixing means is released, the front edge 97 is no longer supported by the connection fixing member 27. For this reason, in the lower frame 25, only the rear edge 49 remains supported by the outer wall 15. In the lower frame 25, only the rear edge 49 in the width direction orthogonal to the longitudinal direction is supported, so that the front edge 97 is lowered around the rear edge 49 as a fulcrum. Thereby, the lower frame 25 is easily detached from the fixing screw 31.

The fire prevention structure of the shutter frame according to claim 3 of the present invention is the fire prevention structure of the shutter frame according to claim 1 or 2,
A bottom plate that is provided between the connection fixing member 27 and the lower frame 25, closes a lower end of the guide rail 39 and the outer frame 23, and is in contact with an end of the seat plate 35 in an extending direction; A pair of steel reinforcing members, the side pieces of which are bent upright from the part and parallel to the outer plate part 53 and are connected and fixed to the outer plate part 53,
The fixing means 31 is fixed to the cap 29 through the bottom plate portion and the lower frame 25.

  In the fire prevention structure of the shutter frame, a fixing means 31 such as a fixing screw is screwed and fixed to the cap 29 through the bottom plate 25 of the reinforcing member and the lower frame 25. Similarly to the above, when the cap 29 is deformed and melted by the flame, the lower frame 25 moves down together with the cap 29 and separates from the fixing screw 31 by its own load. At this time, only the rear edge 49 of the lower frame 25 is supported by the outer wall 15, and the support of the front edge 97 disappears. That is, the lower frame 25 is in an incomplete support state in which the lower frame 25 is inclined forward and downward. On the other hand, the lower ends of the outer frames 23 and the guide rails 39 are closed by the bottom plate of the reinforcing member fixed to the outer frames 23. The end in the extending direction of the seat plate 35 contacts the bottom plate portion of the reinforcing member. Therefore, the reinforcing member can support the load of the shutter curtain 21 by placing both ends in the extending direction of the seat plate 35 on the bottom plate portion even when the lower frame 25 is in an incompletely supported state. it can.

  According to the fire prevention structure of the shutter frame portion according to claim 1 of the present invention, the cap is melted in the event of a fire while securing the security performance during normal use by fixing the outer frame and the lower frame with fixing screws. It will soften and release the fastening with the fixing means, release the fixed state between the outer frame and the lower frame, the end of the lower frame will be a free end, and the lower frame will expand due to heat This also prevents the slats from slipping out of the outer frame and the outside, thereby improving the fire protection performance of the shutter.

  According to the fire prevention structure of the shutter frame portion according to the second aspect of the present invention, when the cap is melted by the flame, the cap can be easily fixed and released from the fixing means.

  According to the fire prevention structure of the shutter frame portion according to the third aspect of the present invention, it is possible to prevent the seat plate from falling off the guide rail when the aluminum member is softened by the flame.

It is a perspective view showing appearance of a shutter device provided with a fire prevention structure of a shutter frame part concerning an embodiment of the invention. FIG. 2 is an exploded perspective view of a fixed portion between one outer frame and a lower frame shown in FIG. 1. FIG. 3 is a front view in which a part of a lower end of the outer frame shown in FIG. 2 is cut away. FIG. 3 is a plan sectional view of a lower end of the outer frame shown in FIG. 2. It is operation | movement explanatory drawing of the cap which is fixed with respect to a fixing screw.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view illustrating an appearance of a shutter device 11 having a fire protection structure for a shutter frame portion according to an embodiment of the present invention.
The fire prevention structure of the shutter frame portion according to the present embodiment can be suitably used for, for example, a shutter device 11 that covers an opening 13 of a house. An opening 13 is provided on the outer wall 15 of the house. A sash window 17 is attached to the opening 13. Above the opening 13 to which the sash window 17 is attached, a storage portion 19 of the shutter device 11 is attached.

  The storage unit 19 stores a winding device (not shown). The winding device has a winding drum. A suspension base, which is the rear end of the shutter curtain 21 in the feeding direction, is fixed to the winding drum. The storage section 19 is provided with a spring (not shown) for urging the winding drum in the winding direction. A part of the weight of the shutter curtain 21 suspended and supported with the opening 13 closed is reduced by the spring.

  The fire prevention structure of the shutter frame portion according to this embodiment includes a shutter curtain 21, an aluminum outer frame 23, an aluminum lower frame 25, a connection fixing member 27, a resin cap 29, and fixing means. And a fixing screw 31 as a main configuration.

  The shutter curtain 21 covers the opening 13 opening to the outer wall 15 by moving up and down outside the outer wall 15. That is, the shutter curtain 21 covers the sash window 17 from outside the outer wall 15. The shutter curtain 21 is configured by connecting a plurality of slats 33 made of aluminum or steel.

  The shutter curtain 21 is configured so that a plurality of slats 33 are connected to each other in a rollable plane shape by engaging both ends along adjacent longitudinal directions. The shutter curtain 21 has a seat plate 35 (also referred to as a skirting board) attached to the front end in the feeding direction. The seat plate 35 is seated on the lower frame 25 when the shutter curtain 21 is lowered. In the vicinity of the seat plate 35, a stopper (not shown) for restricting the rolled-up shutter curtain 21 from being drawn into the storage portion 19 may be provided.

FIG. 2 is an exploded perspective view of a fixed portion between one outer frame 23 and the lower frame 25 shown in FIG.
The outer frame 23 supports a guide rail 39 (see FIG. 4) for inserting the side portion 37 (see FIG. 4) of the shutter curtain 21 and guiding up and down.

  The outer frame 23 extends up and down along each of the pair of guide rails 39. The lower ends of the pair of hanging outer frames 23 are connected by an aluminum lower frame 25.

  The outer frame 23 and the lower frame 25 are components of the shutter frame 41.

  The lower frame 25 is provided laterally across the lower ends of the pair of left and right outer frames. On the front side of the lower frame 25, an erecting front plate 43 is formed upright over the entire length. In the lower frame 25, a draining inclined piece 45 extending in the longitudinal direction is integrally formed on the rear edge opposite to the standing front plate 43. The lower frame 25 is formed on the outer wall side of the draining inclined piece 45 by raising a standing plate 47 over the entire length. In the lower frame 25, the raised plate 47 is fixed to the outer wall 15 with screws at predetermined intervals. Accordingly, the lower frame 25 is formed to be long extending over the respective lower ends of the pair of outer frames 23, and the rear edge 49 on the outer wall side of the pair of longitudinally parallel edges is supported by the outer wall 15. .

FIG. 3 is a front view of the outer frame 23 shown in FIG.
The outer frame 23 is fixed by protruding outward from the outer wall 15. The outer frame 23 holds the guide rail 39 (see FIG. 4) on this protruding side. That is, the guide rail 39 is held apart from the outer wall 15. A gap 51 is formed between the guide rail 39 and the outer wall 15. The width of the lower frame 25 perpendicular to the extending direction (the length in the vertical direction in FIG. 4) substantially matches the length of the protrusion of the outer frame 23. The lower frame 25 closes a lower end of the gap 51 formed between the shutter curtain 21 and the outer wall 15.

FIG. 4 is a plan sectional view of the lower end of the outer frame 23 shown in FIG.
The outer frame 23 has an outer plate portion 53 perpendicular to the outer wall 15. The outer plate portion 53 is formed over the entire height of the outer frame 23. The outer frame 23 has a mounting plate 55 that bends from the outer plate 53 in parallel with the outer wall 15. The outer frame 23 has a stepped plate portion 57 parallel to the mounting plate portion 55 on the side opposite to the outer plate portion 53 with the mounting plate portion 55 interposed therebetween. The mounting plate 55 and the step plate 57 are connected by an inner plate 59 parallel to the outer plate 53. A fixed seat 61 parallel to the inner plate 59 is formed by bending the step plate 57 on the opposite side of the inner plate 59.

  Each of the guide rails 39 is formed in a substantially U-shape in a planar cross section that guides up and down by inserting the side portion 37 of the shutter curtain 21 into the slit 63. Inside the slit 63, a retaining piece 67 that protrudes from the opposing inner wall and forms a locking gap 65 is provided. A neck portion 71 of a T-shaped retaining member 69 fixed to the end of the side portion 37 of the shutter curtain 21 is engaged with the locking gap 65 of the retaining piece 67. Thereby, the shutter curtain 21 can be moved up and down while the removal of the side portion 37 from the slit 63 is restricted.

  More specifically, the guide rail 39 has an inner fixing piece 73 that vertically projects from the slit opening side toward the outer wall 15 and an outer engagement piece that projects parallel to the outer wall 15 from the back side opposite to the slit opening side. The piece 75 forms a substantially h-shape when viewed in plan.

  The connection screw 77 can penetrate the inner fixing piece 73 of the guide rail 39. The fixed seat portion 61 bent from the stepped plate portion 57 is fixed to the inner fixing piece 73 by a connecting screw 77. The outer engagement piece 75 of the guide rail 39 has an engagement groove 79 at a protruding tip. An engagement claw 81 formed on the outer plate 53 of the outer frame 23 is engaged with the engagement groove 79.

  In the outer frame 23, an outer plate portion 53 and an inner plate portion 59 parallel to each other with the mounting plate portion 55 interposed therebetween project vertically from the outer wall 15, and a space portion 83 is formed therebetween. The space 83 is closed by attaching the guide rail 39 to the engaging claw 81 and the fixed seat 61.

  Therefore, a pair of guide rails 39 for guiding the side portions 37 on both sides of the shutter curtain 21 are fixed to the outer wall 15 via the outer frame 23 made of aluminum. Since the outer frame 23 is made of aluminum, the design and rust prevention of the guide rail for the shutter are enhanced, and the outer frame 23 can be reduced in weight.

  The shutter curtain 21 covers the opening 13 by being lowered by the side portions 37 on both sides being guided by the guide rail 39. Thereby, the shutter curtain 21 covers the sash window 17 provided in the opening 13 of the building from the outdoor side.

  As shown in FIG. 2, the connection fixing member 27 is fixed inside the outer plate portion 53 at the lower end of the outer frame 23. The connection fixing member 27 can be made of stainless steel or steel. The connection fixing member 27 is formed in a U-shape in which lower ends of a pair of parallel side pieces 85 are connected by a bottom piece 87. In the connection fixing member 27, one parallel side portion 85 is fixed to the outer plate portion 53 of the outer frame 23 by a plurality of rivets 89. With a plurality of rivets 89, the connection fixing member 27 does not rotate with respect to the outer plate portion 53. A fixing screw insertion hole 91 through which the fixing screw 31 is inserted is formed in the bottom piece 87 of the connection fixing member 27.

  The connection fixing member 27 has a mounting position with respect to the outer frame 23 on a protruding end side of the outer plate portion 53 opposite to the mounting plate portion 55 (the lower side in FIG. 4).

  The cap 29 is integrally formed with the front wall 93 and the side wall 95 into an L-shape in plan view. The cap 29 has an L-shaped bottom wall portion 99 in plan view over the front wall portion 93 and the side wall portion 95. The front wall portion 93 and the side wall portion 95 are each formed in an L-shape in a sectional view. The front wall 93 covers the front edge 97 of the lower frame 25 from the front side. The side wall 95 covers the lower end of the outer frame 23 and the end of the lower frame 25 from outside.

  The cap 29 has a total of three fixing screw screw portions 101 formed on the bottom wall portion 99 of the front wall portion 93 and two on the bottom wall portion 99 of the side wall portion 95. The fixing screw threaded portion 101 is formed in a cylindrical shape hanging down from the bottom wall portion 99. Three fixing screw through holes 103 are formed in the lower frame 25 in accordance with the fixing screw screwing portions 101. The cap 29 has a lower frame 25 in which the fixing screws 31 are inserted into the two fixing screw through holes 103 on both sides of the lower frame 25 from above, and the fixing screws 31 are screwed into the fixing screw screwing portions 101. 25 are fixed in advance to the lower surfaces on both sides in the longitudinal direction.

  The lower frame 25 to which the caps 29 are fixed on both sides is arranged at the lower end of the outer frame 23. A fixing screw 31 is inserted into the connection fixing member 27 fixed to the outer frame 23 from above. The fixing screw 31 inserted into the connection fixing member 27 passes through the fixing screw through hole 103 of the lower frame 25 and is screwed to the fixing screw screwing portion 101 of the cap 29. As a result, the fixing screw 31 is inserted into the connection fixing member 27 from above, penetrates the lower frame 25, and is screwed into the cap 29 to connect the lower end of the outer frame 23 to the end of the lower frame 25. The fixing screw 31, which is a fixing means, may be a rivet, a pin, or the like. The lower frame 25 is sandwiched between the connection fixing member 27 and the cap 29, and the outer frame 23 and the lower frame 25 are connected and fixed in a fixed state. Should be fine.

  Although a fire prevention structure of the shutter frame portion is not shown, a steel reinforcing member may be provided between the connection fixing member 27 and the lower frame 25. This reinforcing member has a bottom plate portion that closes the lower ends of the guide rail 39 and the outer frame 23 and that the end in the extending direction of the seat plate 35 contacts. The bottom plate portion is formed in an L-shape in plan view whose outer shape is surrounded by the outer frame 23 and the guide rail 39 shown in FIG. The side part of the reinforcing member, which is bent from the bottom plate portion in parallel with the outer plate portion 53 and stands up, is connected and fixed to the outer plate portion 53. The reinforcing member may be co-fastened to the outer wall 15 together with the mounting plate 55 together with the mounting plate 55 in parallel with the mounting plate 55 formed upright on the bottom plate. In the fire prevention structure of the shutter frame portion provided with the reinforcing member, the fixing screw 31 passes through the bottom plate portion and the lower frame 25 and is screwed to the cap 29.

Next, the operation of the above configuration will be described.
In the fire prevention structure of the shutter frame portion according to the present embodiment, a resin cap 29 is fixed to the lower surface of both ends in the longitudinal direction of the lower frame 25. The connection fixing member 27 is fixed inside the outer plate portion 53 of the pair of outer frames 23 each supporting the guide rail 39. The fixing screw 31 is inserted into the connection fixing member 27 from above. The fixing screw 31 inserted into the connection fixing member 27 penetrates the lower frame 25, and is screwed and fixed to a cap 29 disposed on the opposite side of the connection fixing member 27 across the lower frame 25. That is, the end of the lower frame 25 is fastened by the fixing screw 31 sandwiched between the connection fixing member 27 and the cap 29. As a result, the end of the lower frame 25 is securely fixed to the outer frame 23 and cannot be easily pryed open during normal use, so that the security is not reduced.

  In the fire prevention structure of the shutter frame portion, when the outer frame 23 and the lower frame 25 are connected, the lower end of the outer frame 23 or the end of the lower frame 25, which is the cut surface of the metal member, is exposed at the protruding corner. The exposed corner portion of the shutter frame portion 41 is covered with the cap 29 made of resin. As a result, the shutter frame portion 41 protrudes from the outer wall 15 with a high-tall window or the like, so that even if a person collides with the lower corner, injury is not caused and safety can be improved.

  Then, when the shutter frame portion 41 is exposed to a flame during a fire, the lower frame 25 expands. Since the lower frame 25 is made of an aluminum member having a larger coefficient of linear expansion than a steel member, both ends in the longitudinal direction are displaced outward on an extension line. Both ends of the lower frame 25 are connected and fixed to lower ends of the outer frames 23 on both sides by fixing screws 31. Therefore, when the lower frame 25 extends, the pair of outer frames 23 tends to open in a direction in which the lower ends are separated from each other.

FIG. 5 is a diagram illustrating the operation of the cap 29 that is released from being fixed to the fixing screw 31.
At this time, in the resin cap 29 whose melting temperature is sufficiently lower than that of the aluminum member, the screwed portion with the fixing screw 31 is softened and melted, and the screwing with the fixing screw 31 is released. As shown in FIG. 5, the lower frame 25 that has lost the support by the fixing screw 31 moves down together with the cap 29 and separates from the fixing screw 31 due to its own load. The cap 29 may be dropped as it is. The end of the lower frame 25 detached from the fixing screw 31 becomes a free end, and can extend (displace) outward on an extension line. Since the pair of outer frames 23 is disconnected from the end of the lower frame 25, the outer frames 23 do not open outward even when the lower frame 25 expands. As a result, the slat 33 does not come off.

  Further, in the fire prevention structure of the shutter frame portion, the connection fixing members 27 that support both ends in the longitudinal direction of the lower frame 25 are provided on the protruding end side of the outer plate portion 53. That is, in the lower frame 25, the front edge portion 97, which is the other edge portion on the side opposite to the outer wall side, is supported by the connection fixing member 27 at two locations on both sides in the longitudinal direction. When the cap 29 is softened and melted by the flame due to the flame and the screw engagement with the fixing screw 31 is released, the front edge 97 is no longer supported by the connection fixing member 27. For this reason, in the lower frame 25, only the rear edge 49 remains supported by the outer wall 15. In the lower frame 25, only the rear edge 49 in the width direction orthogonal to the longitudinal direction is supported, so that the front edge 97 is lowered around the rear edge 49 as a fulcrum. Thereby, in the lower frame 25, the fixing screw through hole 103 is easily pulled out from the fixing screw 31. As a result, when the cap 29 is melted by the flame, the cap 29 can be easily released from the fixing screw 31.

  In the event of a fire, the connection structure between the lower end of the outer frame 23 and the end of the lower frame 25, which is a connection of only the aluminum members, has a reduced load resistance due to the lower frame 25 that is easily deformed. In this case, the lower frame 25 may not be able to support the weight of the shutter curtain 21 including the seat plate 35.

  Further, a spring for urging the shutter curtain 21 in the winding direction is provided in the storage portion 19 of the shutter curtain 21. A part of the weight of the shutter curtain 21 suspended and supported in the closed state is reduced by the spring. However, when the spring is exposed to the flame, the elastic restoring force decreases. For this reason, a larger load is applied to the lower frame 25 than usual.

  In the fire prevention structure of the shutter frame portion provided with the reinforcing member, the fixing screw 31 is screwed into the cap 29 through the bottom plate portion of the reinforcing member and the lower frame 25. Similarly to the above, when the cap 29 is deformed and melted by the flame, the lower frame 25 is lowered together with the cap 29 and detached from the fixing screw 31 by its own load. At this time, only the rear edge 49 of the lower frame 25 is supported by the outer wall 15, and the support of the front edge 97 disappears. That is, the lower frame 25 is in an incomplete support state in which the lower frame 25 is inclined forward and downward. On the other hand, the lower ends of the outer frames 23 and the guide rails 39 are closed by the bottom plate of the reinforcing member fixed to the outer frames 23. The end in the extending direction of the seat plate 35 contacts the bottom plate portion of the reinforcing member. Therefore, the reinforcing member can support the load of the shutter curtain 21 by placing both ends in the extending direction of the seat plate 35 on the bottom plate portion even when the lower frame 25 is in an incompletely supported state. it can. As a result, it is possible to prevent the seat plate 35 from falling off the guide rail 39 when the aluminum member is softened by the flame.

  Therefore, according to the fire prevention structure of the shutter frame portion according to the present embodiment, the fire prevention performance of the shutter can be improved while ensuring the security performance during normal use.

DESCRIPTION OF SYMBOLS 13 ... Opening part 15 ... Outer wall 21 ... Shutter curtain 23 ... Outer frame 25 ... Lower frame 27 ... Connection fixing member 29 ... Cap 31 ... Fixing means (fixing screw)
35 ... seat plate 37 ... side portion 39 ... guide rail 41 ... shutter frame portion 49 ... rear edge portion 53 ... outer plate portion 55 ... mounting plate portion

Claims (3)

A shutter curtain that covers an opening that opens to the outer wall by ascending and descending outside the outer wall, and has a seat plate at a lower end;
While supporting each of a pair of guide rails for guiding the ascending and descending by inserting the side portion of the shutter curtain, extending along the guide rails, the outer plate portion perpendicular to the outer wall and the outer plate portion, A pair of aluminum outer frames having a mounting plate portion bent in parallel with the outer wall,
An aluminum lower frame that is formed in a long shape and extends across the lower ends of the pair of outer frames and a rear edge of the outer wall side of the pair of longitudinally parallel edges supported by the outer wall,
A connection fixing member fixed to the inside of the outer plate portion at the lower end of the outer frame,
A resin cap fixed to the lower surface of both ends in the longitudinal direction of the lower frame,
A fixing unit that is inserted from above into the connection fixing member, penetrates the lower frame, and connects the lower end of the outer frame and the end of the lower frame by being fixed to the cap,
A fire protection structure for a shutter frame portion, comprising: It is a fire prevention structure of the shutter frame part of Claim 1, Comprising:
The fire prevention structure for a shutter frame portion, wherein the connection fixing member is provided at a protruding end of the outer plate portion opposite to the mounting plate portion. It is a fire prevention structure of the shutter frame part according to claim 1 or 2,
A bottom plate portion is provided between the connection fixing member and the lower frame, closes a lower end of the guide rail and the outer frame, and an end in an extending direction of the seat plate is in contact with the bottom plate portion. A pair of steel reinforcing members that are connected and fixed to the outer side plate portion of the side piece that is bent and raised in parallel with the portion,
The fire prevention structure for a shutter frame portion, wherein the fixing means penetrates the bottom plate portion and the lower frame and is fixed to the cap.

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