JP2020020108A - Fire preventive construction of shutter frame - Google Patents

Abstract

To provide a fire preventive construction of a shutter frame that can suppress dropout of a back plate even if a lower frame is deformed by fire and that can improve fireproof performance.SOLUTION: A fire preventive construction of a shutter frame comprises: a shutter curtain 23 for covering an opening 13 by ascending or descending and having a back plate 37 at the end of descent; a pair of aluminum outer frames 27 for supporting each of a pair of guide rails 45 into which a side part 43 of the shutter curtain 23 is inserted and having an outside plate part 55 vertical to an external wall 15 and a mounting plate part 57 bent in parallel with the external wall 15 from the outside plate part 55; a pair of steel reinforcement members 29 that has a bottom plate part 79 for closing the bottom edges of the guide rail 45 and the outer frame 27 and coming into contact with the ends of the extension direction of the back plate 37 and that has a side piece part 81 in parallel with the outside plate part 55 and a co-fastening piece part 85 in parallel with mounting plate part 57, standing from the bottom plate part 79; a rivet 31 for connecting and fixing the outside plate part 55 and the side piece part 81; and a machine screw 33 for fastening the co-fastening piece part 85 together to the external wall 15 with the mounting plate part 57 sandwiched.SELECTED DRAWING: Figure 4

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 outer frame and the lower frame constitute a shutter frame portion. On the lower frame of the shutter frame, a seat plate provided on the lower end of the shutter curtain is placed.

JP 2014-31635 A

  However, at the time of fire, each part is melted, softened, deformed, etc. by the heat of the flame, and the weight of the shutter curtain is applied to the lower frame. This is because when the shutter receives a flame, the spring in the winding unit loses torque and a load is applied in the descending direction. The lower frame is also easily deformed by heat. For this reason, the weight of the entire shutter curtain cannot be supported by the lower frame, which may cause the shutter curtain to fall off.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a shutter frame including a seat plate from falling off even if a lower frame is deformed by a flame, and to improve a fire prevention performance of a shutter frame portion. It is to provide a fire protection structure.

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 51 according to claim 1 of the present invention includes a shutter curtain 23 that covers the opening 13 that opens to the outer wall 15 by ascending and descending outside the outer wall 15 and has a seat plate 37 at a lower end.
An outer plate portion 55 extending along the guide rails 45 and perpendicular to the outer wall 15 while supporting each of a pair of guide rails 45 for guiding the ascending and descending by inserting the side portion 43 of the shutter curtain 23. A pair of aluminum outer frames 27 having a mounting plate portion 57 bent from the outer plate portion 55 in parallel with the outer wall 15;
A bottom plate portion 79 which closes lower ends of the guide rail 45 and the outer frame 27 and is in contact with an end of the seat plate 37 in an extending direction, and a side piece portion 81 parallel to the outer plate portion 55 from the bottom plate portion 79; A pair of steel reinforcing members 29 formed by erecting a co-fastening piece 85 parallel to the mounting plate 57;
A connector 31 for connecting and fixing the outer plate portion 55 and the side piece portion 81,
A fixing member 33 for jointly fixing the joint fastening portion 85 to the outer wall 15 with the mounting plate portion 57 interposed therebetween;
It is characterized by having.

In the fire prevention structure of the shutter frame portion, a steel reinforcing member 29 is sandwiched between the lower end of the outer frame 27 and the end of the lower frame 39, which are conventionally connected only by aluminum members. In the reinforcing member 29, the bottom plate 79 closes the lower ends of the outer frame 27 and the guide rail 45. The outer frame 27 is formed with a mounting plate portion 57 bent from the outer plate portion 55 in parallel with the outer wall 15. The mounting plate 57 is inside the outer plate 55 and is surrounded by the outer plate 55 and the outer wall 15. Therefore, the mounting plate portion 57 is shielded from direct flame from the outside.
On the bottom plate 79 of the reinforcing member 29 that closes the lower end of the outer frame 27, a co-fastening piece 85 parallel to the mounting plate 57 is formed upright from the bottom plate 79. Accordingly, the co-fastening piece 85 is disposed in the space 77 closed by the outer plate 55, the mounting plate 57, and the bottom plate 79, and fixes the mounting plate 57 to the outer wall 15 together. As described above, in the fire prevention structure of the shutter frame, the co-fastening piece 85 of the reinforcing member 29 receiving the load of the shutter curtain 23 against the outer wall 15 is closed by the outer plate 55, the mounting plate 57, and the bottom plate 79. Since it is arranged in the closed space 77, it is shielded from direct flame from the outside.
In the fire prevention structure of the shutter frame portion, a reinforcing member 29 supporting the seat plate 37 is provided with a co-fastening piece portion 85 disposed in a space 77 closed by the outer plate portion 55, the mounting plate portion 57, and the bottom plate portion 79. Is fixed to the outer wall 15. For this reason, the fixing member 29 is released from being fixed to the outer wall 15 even when the shutter frame portion is exposed to the flame and the outer frame 27 and the lower frame 39 become hot and become soft and easily deformed. It is hard to be done. That is, the pair of reinforcing members 29 can continue to support the seat plate 37 with both ends thereof placed on the bottom plate portion 79. As a result, the fire prevention structure of the shutter frame portion delays the time until the lower frame 39 falls off, compared to the shutter frame structure of the lower end of the outer frame 27 and the end of the lower frame 39, which are connected only by the aluminum members. And the seat plate 37 can be supported.

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,
On the outer frame 27, a step plate portion 59 parallel to the attachment plate portion 57 is formed on the opposite side to the outer plate portion 55 with the attachment plate portion 57 interposed therebetween,
A back piece 89 parallel to the step board 59 is formed upright on the bottom plate 79 of the reinforcing member 29, and the step board 59 and the back piece 89 are connected and fixed by a connector. It is characterized by.

  In the fire prevention structure of the shutter frame portion, the reinforcing member 29 is fixedly fastened to the outer wall 15 together with the outer frame 27. The joint fastening is performed by fixing the attachment plate portion 57 of the outer frame 27 and the joint fastening piece portion 85 of the reinforcing member 29 to the outer wall 15 by the fixture 33. On the outer frame 27, a step plate portion 59 parallel to the mounting plate portion 57 is formed on the opposite side of the outer plate portion 55 with the mounting plate portion 57 therebetween. A back piece 89 parallel to the step board 59 is formed upright on the bottom plate 79 of the reinforcing member 29. Then, the step board portion 59 of the outer frame 27 and the back piece 89 of the reinforcing member 29 are fixed by a coupling tool. The step plate portion 59 and the back piece portion 89 are also arranged in the space 77 closed by the outer plate portion 55, the mounting plate portion 57, and the bottom plate portion 79. Therefore, the connecting portion between the step plate portion 59 and the back piece portion 89 is shielded from direct flame from the outside similarly to the above. As a result, the outer frame 27 and the reinforcing member 29 are further firmly fixed by the stepped plate portion 59 and the back piece portion 89 in addition to the above-mentioned jointed portion. In addition, the shape of the outer frame 27 is maintained by fixing the connecting tool 31 and the fixing tool 33, and deformation of the outer frame 27 due to heat is suppressed.

The fireproof structure of the shutter frame according to claim 3 of the present invention is the fireproof structure of the shutter frame according to claim 1 or 2,
A drain hole 91 is formed in the bottom plate portion 79, and a lower surface of the lower frame 39 disposed below the reinforcing member 29, which corresponds to the bottom plate portion 79, is made of resin to cover an end of the lower frame 39. Is attached.

  In the fire prevention structure of the shutter frame, a drain hole 91 is formed in the bottom plate 79 of the reinforcing member 29. The water that has entered the outer frame 27 or the guide rail 45 and has dropped falls from the drain hole 91 to the lower frame 39, falls from between the lower frame 39 and the cap 93, and is drained. When the outer frame 27 and the lower frame 39 are connected, the lower end of the outer frame 27 or the end of the lower frame 39, which is the cut surface of the metal member, is exposed at the protruding corner. The exposed corner of the shutter frame is covered with a resin cap 93.

  According to the fire prevention structure of the shutter frame portion according to claim 1 of the present invention, even if the lower frame is deformed by the flame, the reinforcing member provided at the lower end of the outer frame supports and prevents the seat plate from falling off. Thus, the fire prevention performance of the shutter device can be improved.

  According to the fire prevention structure of the shutter frame portion according to the second aspect of the present invention, the number of fixing portions between the reinforcing member and the outer frame is increased, so that they can be firmly fixed. It is maintained by fixing the fixture and the fixture, and the deformation of the outer frame due to heat is suppressed. In addition, since the reinforcing member receives the load of the shutter curtain on the lower frame, the time until the lower frame falls off can be further delayed.

  According to the fire prevention structure of the shutter frame portion according to claim 3 of the present invention, the shutter frame portion protrudes from the outer wall by a high waist window or the like, and even if a person collides with the lower corner, injury may occur. Safety can be improved.

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. It is a longitudinal cross-sectional view of the storage part shown in FIG. FIG. 3 is an enlarged view of a main part in a connection portion between a lower end of an outer frame and an end of a lower frame shown in FIG. 2. FIG. 4 is a plan sectional view of FIG. 3. It is an exploded perspective view of an outer frame and a reinforcing member. FIG. 4 is an exploded perspective view of an outer frame and a lower frame to which a reinforcing member is fixed.

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. The shutter device 11 is attached outside the sash window 17. 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 the winding device. The winding device has a winding drum 21. The winding drum 21 is rotatably supported by support shafts provided at both ends. A hanging base, which is the rear end of the shutter curtain 23 in the extending direction, is fixed to the winding drum 21. A switch 25 (drive motor) is connected to one end of the winding drum 21 via a reduction gear. When the switch 25 is driven, the rotation of the winding drum 21 is reduced, and the winding drum 21 is driven to rotate in the winding / unwinding direction. The storage section 19 is provided with a spring for urging the shutter curtain 23 in the winding direction. A part of the weight of the shutter curtain 23 suspended and supported with the opening 13 closed is reduced by this spring.

  The fire prevention structure of the shutter frame portion according to the present embodiment includes a shutter curtain 23, an outer frame 27 made of aluminum, a reinforcing member 29 made of steel, a connecting tool (rivet 31), and a fixing tool (screw 33). As a main configuration.

  The shutter curtain 23 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 23 covers the sash window 17 from outside the outer wall 15. The shutter curtain 23 is configured by connecting a plurality of slats 35 made of aluminum or steel.

  The shutter curtain 23 is configured so that a plurality of slats 35 are connected to each other in a rollable plane shape by engaging both ends along adjacent longitudinal directions. The shutter curtain 23 has a seat plate 37 (also referred to as a skirting board) attached to a front end in the extending direction. The seat plate 37 is seated on the lower frame 39 when the shutter curtain 23 is lowered. In the vicinity of the seat plate 37, a stopper 41 (see FIG. 2) for restricting the rolled-up shutter curtain 23 from being drawn into the storage section 19 may be provided.

FIG. 2 is a longitudinal sectional view of the storage section 19 shown in FIG.
The outer frame 27 supports a guide rail 45 for inserting the side portion 43 of the shutter curtain 23 and guiding the ascending and descending.

  A pair of guide rails 45 are provided on the left and right of the opening 13 with the shutter curtain 23 interposed therebetween. The guide rail 45 extends in the vertical direction of the shutter curtain 23 and guides each side 43 (see FIG. 1) of the shutter curtain 23 from both sides.

  A pair of outer frames 27 extend vertically along each of the pair of guide rails 45. The lower ends of the pair of hanging outer frames 27 are connected by an aluminum lower frame 39. The lower frame 39 is provided laterally across the lower ends of the pair of left and right outer frames 27. On the front side of the lower frame 39, an erecting front plate 47 is formed upright over the entire length. The lower frame 39 may be formed integrally with a draining inclined piece 49 extending in the longitudinal direction at a rear edge opposite to the standing front plate 47.

  The outer frame 27, the guide rail 45, and the lower frame 39 constitute a shutter frame 51 shown in FIG.

FIG. 3 is an enlarged view of a main part of a connecting portion between the lower end of the outer frame 27 and the end of the lower frame 39 shown in FIG.
The outer frame 27 is fixed so as to protrude outward (left side in FIG. 3) from the outer wall 15. The outer frame 27 holds the guide rail 45 on this protruding side. That is, the guide rail 45 is held apart from the outer wall 15. Therefore, a gap 53 is formed between the guide rail 45 and the outer wall 15. The width of the lower frame 39 perpendicular to the extending direction (the left and right length in FIG. 3) is substantially equal to the protruding length of the outer frame 27. The lower frame 39 closes the lower end of the gap 53 formed between the shutter curtain 23 and the outer wall 15.

FIG. 4 is a plan sectional view of FIG.
The outer frame 27 has an outer plate portion 55 perpendicular to the outer wall 15. The outer plate portion 55 is formed over the entire length of the outer frame 27. The outer frame 27 has a mounting plate portion 57 that is bent from the outer plate portion 55 in parallel with the outer wall 15. The outer frame 27 has a stepped plate 59 parallel to the mounting plate 57 on the side opposite to the outer plate 55 with the mounting plate 57 interposed therebetween. The mounting plate 57 and the step plate 59 are connected by an inner plate 61 parallel to the outer plate 55. A fixed seat 63 parallel to the inner plate 61 is formed on the stepped plate 59 on the opposite side of the inner plate 61 by bending.

  Each of the guide rails 45 is formed in a substantially U-shape in a planar cross section that guides up and down by inserting the side portion 43 of the shutter curtain 23 into the slit 65. More specifically, the guide rail 45 having a substantially U-shape in plan cross section includes an inner fixing piece 67 that projects vertically from the slit opening side toward the outer wall 15, and an outer wall 15 from the back side opposite to the slit opening side. And an outer engaging piece 69 protruding in parallel with each other, so that the outer engaging piece 69 is formed in a substantially h-shape when viewed in a plane cross section.

  The connection screw 71 can pass through the inner fixing piece 67 of the guide rail 45. The fixed seat 63 bent from the step board 59 is fixed to the inner fixing piece 67 by the connecting screw 71. The outer engaging piece 69 of the guide rail 45 has an engaging groove 73 at the protruding tip. An engaging claw 75 formed on the outer plate portion 55 of the outer frame 27 engages with the engaging groove 73.

  The outer plate portion 55 is formed so as to be bent at a right angle at the outer end of the mounting plate portion 57 so as to project perpendicularly from the outer wall 15, and has a substantially linear shape in plan cross-sectional view. The inner plate portion 61 is bent at the inner end of the mounting plate portion 57, becomes vertical, protrudes from the outer wall 15, is further bent, and is formed into a substantially Z-bend shape in plan sectional view. Both the outer plate portion 55 and the inner plate portion 61 project perpendicularly from the outer wall 15 with the mounting plate portion 57 interposed therebetween, and a space 77 is formed therebetween. The space 77 is a space closed by attaching the guide rail 45 to the tip of the outer plate portion 55 (engaging claw portion 75) and the tip of the inner plate portion 61 (fixed seat portion 63).

  That is, a pair of guide rails 45 for guiding the side portions 43 on both sides of the shutter curtain 23 are fixed to the outer wall 15 via the outer frame 27 made of aluminum. Since the outer frame 27 is made of aluminum, the design and rust prevention of the guide rail for the shutter are enhanced, and the outer frame 27 can be reduced in weight.

  The shutter curtain 23 is covered by the guide rail 45 supported on the outer wall 15 via the outer frame 27 with the side portions 43 on both sides, so that the shutter curtain 23 covers the opening 13 by descending. Thereby, the shutter curtain 23 can cover the sash window 17 provided in the opening 13 of the building from the outdoor side. In the outer frame 27, the outer plate portion 55 is exposed to the outside. On the other hand, the mounting plate portion 57, the inner plate portion 61, the stepped plate portion 59, and the fixed seat portion 63 are cut off through the space portion 77, which is inside the shutter curtain 23 and serves as an air layer from outside.

  A space 77 surrounded by the outer frame 27 and the guide rail 45 has an open lower end portion closed by a reinforcing member 29 made of steel. The reinforcing member 29 covers the lower end of the space 77 with a bottom plate 79 formed in a substantially flat cross-sectional shape of the space 77.

FIG. 5 is an exploded perspective view of the outer frame 27 and the reinforcing member 29.
The reinforcing member 29 closes the lower ends of the guide rail 45 and the outer frame 27. In other words, the guide rail 45 is placed on the bottom plate 79 of the reinforcing member 29. As described above, the guide rail 45 guides the vertical movement by inserting the side portion 43 of the shutter curtain 23 into the slit 65. As shown in FIG. 4, the lower end of the slit 65 is closed by the bottom plate 79 of the reinforcing member 29. Therefore, both ends of the seat plate 37 of the shutter curtain 23 descending the slit 65 in the extending direction land on the bottom plate portion 79 of the reinforcing member 29, that is, both ends of the seat plate 37 are supported by the bottom plate portion 79.

  In the reinforcing member 29, a side piece 81 parallel to the outer plate 55 is formed upright from the bottom plate 79. The side piece portion 81 is connected and fixed to the outer plate portion 55 by a connecting tool. As the connecting tool, for example, a rivet 31 can be suitably used. In the outer plate portion 55 and the side piece portion 81, a plurality of (two in the illustrated example, two each) rivet holes 83 for inserting the rivets 31 are formed.

  Further, a co-fastening piece 85 parallel to the mounting plate 57 is formed on the reinforcing member 29 so as to rise from the bottom plate 79. A screw insertion hole 87 through which the screw 33 is inserted is formed in the co-fastening piece 85 and the mounting plate 57. The co-fastening piece 85 is co-fastened to the outer wall 15 by the fixture with the mounting plate 57 interposed therebetween. As the fixing tool, a screw 33, a wood screw or the like is preferably used.

  Further, a back piece 89 parallel to the step board 59 of the outer frame 27 is formed on the reinforcing member 29 so as to stand up from the bottom plate 79. A rivet hole 83 for inserting the rivet 31 is formed in the step plate portion 59 and the back piece portion 89. The back piece 89 is connected and fixed to the step board 59 of the outer frame 27 by the rivets 31.

  A drain hole 91 is formed in the bottom plate 79 of the reinforcing member 29.

  The fire-prevention structure of the shutter frame portion is made of a resin material shown in FIG. 3 that covers an end in the extending direction of the lower frame 39 on the lower surface corresponding to the bottom plate portion 79 of the lower frame 39 disposed below the reinforcing member 29. The cap 93 is attached.

FIG. 6 is an exploded perspective view of the outer frame 27 and the lower frame 39 to which the reinforcing member 29 is fixed.
In the reinforcing member 29, the side piece 81 and the back piece 89 are fixed to the outer plate 55 and the stepped plate 59 of the outer frame 27 in advance by rivets 31. The lower frame 39 is attached to the lower surface of the outer frame 27 with the reinforcing member 29 attached. The cap 93 is attached to the lower surface of the lower frame 39 on both sides in the extending direction. The assembly of the shutter frame 51 is thus completed.

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 steel reinforcing member 29 is sandwiched between the lower end of the outer frame 27 and the end of the lower frame 39, which were conventionally connected only by aluminum members. You. In the reinforcing member 29, the bottom plate 79 closes the lower ends of the outer frame 27 and the guide rail 45 in a lid shape. The outer frame 27 is formed with a mounting plate portion 57 bent from the outer plate portion 55 in parallel with the outer wall 15. The mounting plate 57 is inside the outer plate 55 and is surrounded by the outer plate 55 and the outer wall 15. Therefore, the mounting plate portion 57 is shielded from direct flame from the outside.

  On the bottom plate 79 of the reinforcing member 29 that closes the lower end of the outer frame 27, a co-fastening piece 85 parallel to the mounting plate 57 is formed upright from the bottom plate 79. Accordingly, the co-fastening piece 85 is disposed in the space 77 closed by the outer plate 55, the mounting plate 57, and the bottom plate 79, and fixes the mounting plate 57 to the outer wall 15 together. As described above, in the fire prevention structure of the shutter frame, the co-fastening piece 85 of the reinforcing member 29 receiving the load of the shutter curtain 23 against the outer wall 15 is closed by the outer plate 55, the mounting plate 57, and the bottom plate 79. Since it is arranged in the closed space 77, it is shielded from direct flame from the outside.

  In the fire prevention structure of the shutter frame, when the temperature of the aluminum lower frame 39 becomes high due to a fire, the aluminum lower frame 39 is softened and easily deformed. The lower frame 39 is in contact with a seat plate 37 provided at the lower end of the shutter curtain 23. The lower frame 39 supports the weight of the shutter curtain 23 via the seat plate 37.

  In the conventional connection structure between the lower end of the outer frame 27 and the end of the lower frame 39, which has been a connection only between aluminum members, the lower frame 39 that has been easily deformed has a sudden decrease in load resistance and the seat plate 37 The weight of the shutter curtain 23 cannot be supported, and the shutter curtain 23 may fall off together with the seat plate 37.

  Further, a spring for urging the shutter curtain 23 in the winding direction is provided in the storage section 19 of the shutter curtain 23. A part of the weight of the shutter curtain 23 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 39 than in a normal state, and the lower frame 39 is more easily dropped.

  On the other hand, in the fire prevention structure of the shutter frame portion, the reinforcing member 29 supporting the seat plate 37 is disposed in the space 77 closed by the outer plate portion 55, the mounting plate portion 57, and the bottom plate portion 79. It is fixed to the outer wall 15 by the fastening piece 85. For this reason, the reinforcing member 29 can be fixed to the outer wall 15 even when the shutter frame 51 is exposed to the flame and the outer frame 27 and the lower frame 39 become hot and become soft and easily deformed. It is difficult to release. That is, the pair of reinforcing members 29 can continue to support the seat plate 37 with both ends thereof placed on the bottom plate portion 79. As a result, the fire prevention structure of the shutter frame portion delays the time until the lower frame 39 falls off, compared to the shutter frame structure of the lower end of the outer frame 27 and the end of the lower frame 39, which are connected only by the aluminum members. Can be done.

  Further, in the fire prevention structure of the shutter frame portion, the reinforcing member 29 is fixedly fastened to the outer wall 15 together with the outer frame 27. The joint fastening is performed by fixing the attachment plate portion 57 of the outer frame 27 and the joint fastening piece portion 85 of the reinforcing member 29 to the outer wall 15 with a fixing tool (screw) 33. On the outer frame 27, a step plate portion 59 parallel to the mounting plate portion 57 is formed on the opposite side of the outer plate portion 55 with the mounting plate portion 57 therebetween. A back piece 89 parallel to the step board 59 is formed upright on the bottom plate 79 of the reinforcing member 29.

  Then, the stepped plate portion 59 of the outer frame 27 and the back piece portion 89 of the reinforcing member 29 are fixed by the connecting tool (rivet) 31. The step plate portion 59 and the back piece portion 89 are also arranged in the space 77 closed by the outer plate portion 55, the mounting plate portion 57, and the bottom plate portion 79. Therefore, the connecting portion between the step plate portion 59 and the back piece portion 89 is shielded from direct flame from the outside similarly to the above. As a result, the outer frame 27 and the reinforcing member 29 are further firmly fixed by the stepped plate portion 59 and the back piece portion 89 in addition to the above-mentioned jointed portion. As a result, the time until the lower frame 39 falls off can be further delayed.

  Further, in the fire prevention structure of the shutter frame portion, a drain hole 91 is formed in the bottom plate portion 79 of the reinforcing member 29. The water that has entered the outer frame 27 or the guide rail 45 and has dropped falls from the drain hole 91 to the lower frame 39, falls from between the lower frame 39 and the cap 93, and is drained.

  When the outer frame 27 and the lower frame 39 are connected, the lower end of the outer frame 27 or the end of the lower frame 39, which is the cut surface of the metal member, is exposed at the protruding corner. The exposed corner of the shutter frame 51 is covered with a cap 93 made of resin. As a result, the shutter frame portion 51 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, no injury is caused and safety can be improved.

  Therefore, according to the fire prevention structure of the shutter frame portion according to the present embodiment, even if the lower frame 39 is deformed by the flame, the falling off of the shutter curtain 23 including the seat plate 37 can be suppressed, and the fire prevention performance can be improved.

DESCRIPTION OF SYMBOLS 13 ... Opening 15 ... Outer wall 23 ... Shutter curtain 27 ... Outer frame 29 ... Reinforcement member 31 ... Connecting tool (rivet)
33… Fixture (screw)
37 ... seat plate 39 ... lower frame 43 ... side portion 45 ... guide rail 51 ... shutter frame portion 55 ... outer plate portion 57 ... mounting plate portion 59 ... step plate portion 79 ... bottom plate portion 81 ... side piece portion 85 ... joint fastening piece Part 89 ... Spine part 91 ... Drain hole 93 ... Cap

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 descending end;
While supporting each of a pair of guide rails that guide 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,
A bottom plate portion that closes a lower end of the guide rail and the outer frame and is in contact with an end in the extending direction of the seat plate. From the bottom plate portion, a side piece portion parallel to the outer plate portion and a parallel to the mounting plate portion. A pair of steel reinforcing members formed with the co-fastening pieces standing up,
A connecting tool for connecting and fixing the outer plate portion and the side piece portion,
A fixture for fixing the co-fastening piece to the outer wall with the mounting plate portion interposed therebetween,
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:
On the outer frame, a step plate portion parallel to the mounting plate portion is formed on a side opposite to the outer plate portion with respect to the mounting plate portion,
A spine portion parallel to the step plate portion is formed upright on the bottom plate portion of the reinforcing member,
The step frame portion and the back piece portion are connected and fixed by a connecting tool. It is a fire prevention structure of a shutter frame part of Claim 1 or 2, Comprising:
A drain hole is drilled in the bottom plate portion,
A fire protection structure for a shutter frame portion, wherein a resin cap for covering an end of the lower frame is attached to a lower surface corresponding to the bottom plate portion of a lower frame disposed below the reinforcing member.

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