window shutters

Abstract

To provide a window shutter capable of improving wind pressure resistance.SOLUTION: The window shutter with a shutter curtain 5 for opening / closing a space formed with a shutter storage housing provided to a building frame protruding outdoor, left and right side frames, and a floor FL. The side frames are constituted of a guide rail base frame 3 and a guide rail 4. In the lower part of the guide rail base frame 3, a side frame opening prevention member 7 is provided. The side frame opening prevention member 7 is provided with a bottom portion 70 that closes to or abuts the lower end of the side frame and closes the lower end of the side frame. The bottom portion 70 is provided with a rising piece 75 formed in contact with or close to the lower end portion of the outdoor facing surface of the side frame.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a window shutter. [Background technology]

[0002] A window shutter is a shutter that opens and closes the space on the outdoor side of a window opening, and is equipped with left and right guide rails attached to left and right guide rail base frames that are protruding from the main body, a shutter case that is protruding from the main body, and a shutter curtain that can be wound up on a winding shaft provided within the shutter case, with both widthwise ends of the shutter curtain guided by the left and right guide rails to open and close the space on the outdoor side of the window opening.

[0003] In a typical window shutter, the upper ends of the left and right guide rail base frames are fixed to the underside of the shutter case (inner lintel), and the lower ends are fixed to a drip board (bottom frame) extending in the width direction of the opening (Patent Document 1). This allows the shutter curtain to open and close a four-sided frame-shaped opening. Even when wind pressure acts on the shutter curtain while the opening is closed, the guide rail base frames are prevented from deforming in the opening direction. If the guide rail base frames were to deform in the opening direction, the widthwise ends of the shutter curtain would easily come out of the guide grooves of the guide rail, impairing wind pressure resistance. Furthermore, in addition to the guide rail base frames deforming in the opening direction, if the exterior-facing surface of the guide rail opens, the widthwise ends of the shutter curtain would be even more likely to come out of the guide grooves.

[0004] However, when window shutters are installed on the outdoor side of a French window, for example, the bottom end of the shutter curtain when fully closed rests directly on the floor (ground), and some do not have a drip board connecting the bottom ends of the left and right guide rail base frames. Because the guide rail base frames are provided in a protruding manner from the frame, the absence of a drip board connecting the bottom ends of the guide rail base frames could affect the wind pressure resistance of the window shutter when fully closed. [Patent Document 1] Patent Publication No. 2013-177743 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] The present invention aims to improve the wind pressure resistance of a window shutter that does not have a water drip board at the lower end of the side frame. [Means for solving the problem]

[0006] The technical means adopted by the present invention are: In a window shutter, a shutter curtain opens and closes the space formed by a shutter storage section provided in a cantilevered shape on the main body, the left and right side frames, and the floor. At least the lower portion of each side frame is provided with a side frame opening prevention means. Window shutters. In one embodiment, the side frame opening prevention means is connected only to the side frame (typically the guide rail base frame) by a fixing means (typically a screw or rivet), and the fixing means does not connect the side frame opening prevention means to the main body or floor surface.

[0007] In one embodiment, the side frame comprises: A prospective edge extending in a direction away from the building body; a first visible edge protruding toward the space at a tip end side of the visible edge; a second visible side protruding toward the space at a base end side of the visible side; Equipped with The side frame opening prevention means includes a front piece, a first front piece on the tip side of the front piece, and a second front piece on the base end side of the front piece, The first visible piece of the side frame opening prevention means abuts against and is connected to the first visible edge of the side frame, the second visible piece of the side frame opening prevention means abuts against and is connected to the second visible edge of the side frame, and the visible piece of the side frame opening prevention means extends along the visible edge of the side frame.

[0008] In one embodiment, the projection piece of the side frame opening prevention means faces the projection edge of the side frame at a distance, The upper end of the side frame opening prevention means is provided with an upper surface portion that closes the hollow portion of the side frame opening prevention means, The projected edge of the upper surface portion abuts or is close to the projected side of the side frame. In one embodiment, the projection piece of the side frame opening prevention means may extend close to the projection edge of the side frame.

[0009] In one embodiment, the side frame opening prevention means is connected to the side frame in a state close to or in contact with the floor surface. In one embodiment, the side frame opening prevention means has a bottom surface portion that is close to or abuts against the lower end of the side frame to close the lower end of the side frame, The bottom surface is formed with a rising piece that abuts against or is close to the lower end of the exterior facing surface of the side frame. In one embodiment, the bottom surface portion is integrally formed at the lower end of the projection piece of the side frame opening prevention means. In one aspect, the side frame opening prevention means comprises a first side frame opening prevention member having a projection piece, a first projection piece at the tip end side of the projection piece, and a second projection piece at the base end side of the projection piece, and a second side frame opening prevention member having the bottom surface portion.

[0010] In one embodiment, the side frame comprises a guide rail base frame provided in a corbel shape on the main body, and a guide rail attached to the tip of the guide rail base frame, The guide rail base frame has the first visible edge, the second visible edge, and the visible edge, and the side frame opening prevention means is connected to the guide rail base frame, The rising piece abuts against or is close to the lower end of the outdoor facing surface of the guide rail.

[0011] In one embodiment, the window shutter is installed on the exterior side of the window sash, The floor surface is located below the window sash, At least the lower portion of the side frame opening prevention means is located below the window sash. [Effects of the Invention]

[0012] The window shutter of the present invention has opening prevention means attached to at least the lower portions of the left and right side frames, thereby improving wind pressure resistance even for window shutters that do not have drip boards at the lower ends of the side frames. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a vertical cross-sectional view of the window shutter according to the present embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the window shutter according to the present embodiment. [Figure 3] FIG. 2 is a partial cross-sectional view of a lower portion (position below the window opening) of the window shutter according to the present embodiment. [Figure 4] 1 is a plan view of a side frame to which a side frame opening prevention member according to the first embodiment is attached. FIG. [Figure 5] The left figure is a view of FIG. 4 from direction A, and the right figure is a view of FIG. 4 from direction B. [Figure 6] FIG. 2 is a plan view of a guide rail base frame to which a side frame opening prevention member according to the first embodiment is attached. [Figure 7] The left figure is a view of FIG. 6 from direction A, and the right figure is a view of FIG. 6 from direction B. [Figure 8] FIG. 2 is a diagram showing a guide rail base frame according to the present embodiment. [Figure 9] 3A and 3B are diagrams showing a side frame opening prevention member according to the first embodiment. [Figure 10] FIG. 2 is a perspective view of a side frame opening prevention member according to the first embodiment. [Figure 11] A diagram showing a side frame to which a side frame opening prevention member related to the second embodiment is attached. [Figure 12] 10 is a diagram showing a first side frame opening prevention member according to a second embodiment. FIG. [Figure 13]A diagram showing a second side frame opening prevention member according to the second embodiment. [Figure 14] A diagram showing a side frame to which a side frame opening prevention member related to the first aspect of the third embodiment is attached. [Figure 15] A diagram showing a side frame opening prevention member related to the first aspect of the third embodiment. [Figure 16] A diagram showing a side frame to which a side frame opening prevention member related to the second aspect of the third embodiment is attached. [Figure 17] A diagram showing a side frame opening prevention member related to the second aspect of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] [A] Overall structure of window shutter An embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a side view of a window shutter in a fully closed position according to this embodiment, and Fig. 2 is a vertical cross-sectional view of the window shutter. The window shutter according to this embodiment is a window shutter device installed on the outdoor side of a window sash S. The window sash S according to this embodiment is a so-called French window, which has, for example, two sliding door bodies or folding doors that open and close the window opening, and the lower ends of the window opening and the door bodies reach near the bottom of the indoor space. The outdoor side of the window opening is a balcony. The outdoor side of the window opening may also be a terrace on the first floor of a building.

[0015] The window shutter is composed of left and right brackets 1 located above the window opening and attached to the main body (exterior wall W) in a corrugated shape, a winding shaft 2 supported between the left and right brackets 1, a guide rail base frame 3 on the left and right sides of the opening width direction attached to the exterior wall W in a corrugated shape, left and right guide rails 4 supported by the guide rail base frames 3 on the left and right sides of the opening width direction, a shutter curtain 5 connected at its upper end to the winding shaft 2, which is wound / unwound onto the winding shaft 2 so that both widthwise ends of the shutter curtain 5 rise and fall while being guided by the guide rails 4, opening and closing the outdoor space of the window opening, a shutter case 6 located above the window opening and attached to the exterior wall W in a corrugated shape, which stores the shutter curtain 5 wound up on the left and right brackets 1 and the winding shaft 2, and an opening / closing mechanism M attached to the drive side bracket 1 and driving the winding shaft 2 to rotate.

[0016] The window shutter according to this embodiment does not have a drip board (bottom frame). In other words, the opening that is opened and closed by the window shutter is a space surrounded by the underside (inner lintel 60) of the shutter case 6, the left and right side frames (guide rail base frame 3 + guide rail 4), and the balcony floor FL. In the window shutter according to this embodiment, a side frame opening prevention member 7 is provided below the guide rail base frame 3. The side frame opening prevention member 7 will be described in detail later.

[0017] The shutter curtain 5 is formed by connecting long slats 50 extending in the width direction of the opening at the top and bottom, and the shutter curtain 5 opens and closes the opening by raising and lowering both widthwise ends of the slats 50 guided by the grooves of the guide rails 4, and when the opening is fully closed, the seat plate 51 at the bottom end rests on the floor surface FL. The floor surface FL of the balcony in this embodiment slopes gently downward from the indoor side to the outdoor side.

[0018] As shown in FIGS. 1 and 3, in this embodiment, the height position of the outdoor floor surface FL is located below the lower end of the window opening (window sash S), and a lower wall surface W′ is formed vertically at the indoor end of the floor surface FL. hand In this embodiment, the lower wall surface W' is located closer to the interior than the exterior wall W to which the guide rail base frame 3 and the shutter case 6 are attached. A waterproof layer 10 is formed from the floor surface FL to the lower wall surface W'. A sealing material may be provided in the space between the exterior wall W and the lower wall surface W'.

[0019] [B] Window shutter side frame The side frames of the window shutter according to this embodiment are made up of a guide rail base frame 3 that projects from the exterior wall W, and a guide rail 4 that is connected to the tip end of the guide rail base frame 3. The guide rail base frame 3 and guide rail 4 according to this embodiment are formed from aluminum extrusions, but the materials for the guide rail base frame 3 and guide rail 4 are not limited. The configurations of the guide rail base frame 3 and guide rail 4 according to this embodiment will be described in detail below.

[0020] [B-1] Guide rail base frame The guide rail base frame 3 is a long member that extends perpendicular to the height direction of the opening, and as shown in Fig. 8, has a side edge 30 that extends in the forward direction so as to be away from the outer wall W, and the side edge 30 has an outer surface on the outside (the side farther from the opening) and an inner surface on the inside (the side closer to the opening). A fixed edge 31 that extends outward from the outer surface in the forward direction is integrally formed at the base end of the side edge 30.

[0021] An attachment portion for the guide rail 4 is integrally formed in the tip end portion of the guide rail base frame 3, i.e., the tip end portion 300 of the side edge 30, so that the guide rail 4 is attached to and supported by the attachment portion. The attachment portion comprises the tip end portion 300 of the side edge 30, an engaged portion 32 that is approximately U-shaped in cross section and is integrally formed at the tip of the tip end portion 300, a tip end visible edge 33 that protrudes inward (toward the opening) from the base end of the tip end portion 300 in the visible direction, and a connected edge 34 that extends in the visible direction from the tip of the tip end visible edge 33 to the outdoor side (away from the exterior wall W) facing the tip end portion 300 of the side edge 30.

[0022] A base end side visible edge 35 that protrudes inward from the inner surface in the visible direction is formed on the base end side of the side edge 30 of the guide rail base frame 3. An intermediate visible edge 36 that protrudes inward from the inner surface in the visible direction is formed in a location closer to the base end than the center of the projected dimension of the side edge 30. A bent piece 360 ​​is integrally formed at the tip of the intermediate visible edge 36.

[0023] A fixed edge 31 located at the base end and extending outward in the facing direction protrudes from the outer surface of the side edge 30 of the guide rail base frame 3, and three edges extending parallel to the facing direction protrude from the inner surface of the side edge 30: a tip-side facing edge 33, a base-side facing edge 35, and an intermediate facing edge 36. In this embodiment, the protruding dimensions of the base-side facing edge 35 and the intermediate facing edge 36 are approximately the same, and the tip of the base-side facing edge 35 and the tip of the intermediate facing edge 36 are located on the same vertical plane. The protruding dimension of the tip-side facing edge 33 is slightly larger than the protruding dimensions of the base-side facing edge 35 and the intermediate facing edge 36.

[0024] [B-2] Guide rail The guide rail 4 is a long member that extends perpendicular to the height direction of the opening, and as shown in Figure 4, has a roughly U-shaped shape in a plan view, consisting of a side edge (outdoor side facing) 40 that is farther from the exterior wall W, a side edge (outdoor side facing) 41 that is closer to the exterior wall W, and a bottom edge 42, and a guide groove is formed between the opposing side edges 40, 41 that receives both widthwise ends of the shutter curtain 5 and guides it in the vertical direction.

[0025] An extending edge 43 is integrally formed on the base end side of side edge 41, extending beyond bottom edge 42 in a direction away from the opening, and an inclined edge 44 is integrally formed, extending from bottom edge 42 outward (in the direction away from the opening) toward the main body at an angle in plan view, and the tip of inclined edge 44 and the tip of extending edge 43 (the side farther from the guide groove) are integrally connected to form a corner, and a locking piece 45 that is generally L-shaped in cross section is integrally formed on the corner. A connecting edge 46 is integrally formed on the base end side (the side closer to the guide groove) of extending edge 43, extending in the projection direction toward the main body.

[0026] [B-3] Side frame The guide rail base frame 3 is provided in a protruding manner relative to the exterior wall W by abutting the fixed edge 31 of the side edge 30 against the exterior wall W and fixing it to the frame with multiple screws 310 along the height direction. With the locking piece 45 of the guide rail 4 locked to the locking portion 32 of the guide rail base frame 3, the connecting edge 46 of the guide rail 4 and the connected edge 34 of the guide rail base frame 3 are abutted against each other and connected with multiple screws 47 along the height direction, thereby connecting the guide rail 4 to the guide rail base frame 3. Guide rails 4 connected to and supported by the guide rail base frame 3 are well known to those skilled in the art, and the connection between the guide rail base frame 3 and the guide rail 4 is not limited to the illustrated embodiment. The upper portions of the left and right side frames (upper portions of the side edges 30 of the guide rail base frame 3) are fixed to the inner lintel 60 on the underside of the shutter case 6 with screws (not shown). No drip boards (lower frames) are provided in the lower portions of the left and right side frames (lower portions of the side edges 30 of the guide rail base frame 3).

[0027] As shown in FIG. 2 , the guide rail base frame 3 is attached by fixing the fixed edge 31 to the outer wall W with screws 310 while the fixed edge 31 is in contact with the outer wall W. The base end visible edge 35 extends in the visible direction at a slight distance from the base end of the side edge 30, so that when the guide rail base frame 3 is fixed to the outer wall W, the base end visible edge 35 and the outer wall W are spaced apart. A watertight member 11 extending in the height direction is provided on the back surface of the base end visible edge 35, and closes the gap between the base end visible edge 35 and the outer wall W along the height direction. In this embodiment, the watertight member 11 does not reach the lower portion of the base end visible edge 35, and a side frame opening prevention member 7 is located below the watertight member 11.

[0028] A plurality of mating members 37 are provided along the height direction on the base end side of the outer surface of the side edge 30 of the guide rail base frame 3, and a decorative cover 38 extending along the height direction is attached to the base end side of the side edge 30 of the guide rail base frame 3. The decorative cover 38 comprises a main body 380 having a U-shape in cross section and equipped with a mating portion, a facing piece 381, and a facing piece 382, ​​and when the main body 380 of the decorative cover 38 is mated with the mating member 37 of the guide rail base frame 3, the tip of the facing piece 382 abuts or is close to the tip of the fixed edge 31 of the guide rail base frame 3, and the facing piece 381 faces the outer wall W at a distance, and a watertight member 12 is fitted between the facing piece 381 and the outer wall.

[0029] [C] Side frame opening prevention means [C-1] First embodiment The side frame opening prevention means according to the first embodiment is made up of a side frame opening prevention member 7. As shown in Figures 9 and 10, the side frame opening prevention member 7 is made up of a bottom surface portion 70, a vertical surface portion 71 extending in the projection direction, a tip end flap 72, a base end flap 73, and a top surface portion 74. A slit 742 is formed in the top surface portion 74, positioned closer to the base end than the center in the projection direction, dividing the top surface portion 74 into a first portion 740 on the tip end side and a second portion 741 on the base end side. The lower portion of the tip end flap 72 is a narrow portion 720. The side frame opening prevention member 7 according to this embodiment is obtained by bending a steel plate of a predetermined shape.

[0030] The bottom surface portion 70 of the side frame opening prevention member 7 extends in the projection direction as a whole and consists of a projection portion 70A on which the lower end of the guide rail base frame 3 rests, and a tip portion 70B which extends inward in the projection direction from the tip side of the projection portion (toward the opening) and on which the lower end of the guide rail 4 rests.

[0031] The projection portion 70A of the bottom surface portion 70 includes an outer projection edge 700, an inner projection edge 701, a base-side first projection edge 702, and a base-side second projection edge 703. The base-end side of the outer projection edge 700 of the projection portion 70A has a wide stepped portion shape that corresponds to the cross-sectional shape of the decorative cover 38 provided on the base-end side of the outer surface of the side edge 30 of the guide rail base frame 3.

[0032] The tip end portion 70B of the bottom portion 70 includes an outer visible edge 704, an inner visible edge 705, a projected edge 706 connecting the tips (the side closer to the opening) of the outer visible edge 704 and the inner visible edge 705, and a slanted edge 707 extending from the base end (the side farther from the opening) of the outer visible edge 704 to the tip end (the side farther from the outer wall W) of the outer visible edge 700 of the projected portion 70A of the bottom portion 70. In the tip end portion 70B, a rising piece 75 is integrally formed at the corner between the outer visible edge 704 and the projected edge 706, extending vertically from the tip end portion (the side closer to the opening) of the outer visible edge 704. Note that the rising piece 75 may be formed to rise from the entire length of the outer visible edge 704.

[0033] The side frame opening prevention member 7 is connected to the guide rail base frame 3. As shown in Figures 6 and 7, the tip end end piece 72 of the side frame opening prevention member 7 is connected by a blind rivet 76 while abutting against the tip end end edge 33 of the guide rail base frame 3, and the base end end piece 73 of the side frame opening prevention member 7 is connected by a blind rivet 77 while abutting against the base end end edge 35 of the guide rail base frame 3. The intermediate end edge 36 of the guide rail base frame 3 is inserted through a slit 742 in the top surface portion 74 of the side frame opening prevention member 7. The base end end end piece 73 of the side frame opening prevention member 7 may also be fixed to the intermediate end edge 36.

[0034] In this embodiment, the base end facing piece 73 of the side frame opening prevention member 7 is connected by abutting against the back side (exterior wall W side) of the base end facing edge 35 of the guide rail base frame 3, and the base end facing piece 73 of the side frame opening prevention member 7 is located between the base end facing edge 35 of the guide rail base frame 3 and the exterior wall W. In the space between the base end facing edge 35 of the guide rail base frame 3 and the exterior wall W, the base end facing piece 73 of the side frame opening prevention member 7 is located in the lower part, and a watertight member 11 is provided directly above it across the height direction. Note that the base end facing piece 73 of the side frame opening prevention member 7 may also be connected by abutting against the front side (opposite the exterior wall W) of the base end facing edge 35 of the guide rail base frame 3.

[0035] The vertical surface portion 71 of the side frame opening prevention member 7 faces the inner surface of the side edge 30 of the guide rail base frame 3 at a distance. A hollow portion is formed between the vertical surface portion 71 of the side frame opening prevention member 7, the side edge 30 of the guide rail base frame 3, and the tip-side end piece 72 and base-side end piece 73 of the side frame opening prevention member 7. The upper surface portion 74 is located at the upper end of the hollow portion (the projected edge 7400 of the first portion 740 and the projected edge 7410 of the second portion 741 are close to or abut the side edge 30), minimizing the risk of dust or other foreign matter entering and accumulating in the hollow portion or accidentally inserting a finger. The upper surface portion 74 is an optional element and may not be provided. The vertical surface portion 71 of the side frame opening prevention member 7 is located at approximately the same position as a vertical plane passing through the bottom edge 42 of the guide rail 4 (see FIG. 4). The vertical surface portion 71 of the side frame opening prevention member 7 faces, at a distance, the inner surface of the side edge 30 of the guide rail base frame 3. The side frame opening prevention member 7 may be connected to the guide rail base frame 3 in such a manner that the vertical surface portion 71 of the side frame opening prevention member 7 is close to or abuts against the inner surface of the side edge 30 of the guide rail base frame 3.

[0036] As shown in Figures 4 and 5, when the side frame opening prevention member 7 is connected to the guide rail base frame 3, the bottom surface 70 of the side frame opening prevention member 7 covers the lower end of the side frame (guide rail base frame 3 + guide rail 4) from below, and the rising piece 75 abuts or is close to the tip end portion (the side closer to the opening) of the outer surface (the exterior-facing surface) of the side edge 40 of the guide rail 4. Alternatively, a rising piece extending in the projection direction may be provided on the bottom surface 700, and this rising piece may be abutted against and fixed (with screws, rivets, etc.) to the lower end portion of the side edge 30. As shown in Figure 1, the side frame opening prevention member 7 according to this embodiment is connected to the lower portion of the guide rail base frame 3, and the side frame opening prevention member 7 is located below the lower end of the window sash S (window opening). The side frame opening prevention member 7 may extend above the lower end of the window sash S (window opening), and in this case, the side frame opening prevention member 7 is designed not to come into contact with the window sash S. When the side frame opening prevention member 7 extends upward (when the height dimension is greater than in the illustrated embodiment), the base end visible edge 35 of the guide rail base frame 3 and the base end visible piece 73 of the side frame opening prevention member may be fixed to the exterior wall W with screws (see screws 310 in Figures 1 and 2).

[0037] In the first embodiment, the leading end facing piece 72 and the base end facing piece 73 of the side frame opening prevention member 7 are connected to the leading end facing edge 33 and the base end facing edge 35 of the side edge 30 of the guide rail base frame 3. The vertical surface portion 71 of the side frame opening prevention member 7 extends parallel to and spaced apart from the side edge 30 of the guide rail base frame 3, restricting the deflection of the side edge 30 of the guide rail base frame 3 and preventing the side frame (side edge 30) from opening. Furthermore, the rising piece 75 of the bottom surface portion 70 of the side frame opening prevention member 7 abuts or is close to the lower end portion of the leading end portion (the side closer to the opening) of the side edge 40 of the guide rail 4. The rising piece 75 resists a force in the direction of opening the side frame, preventing the side frame from opening. The side frame opening prevention member 7 is fixed only to the guide rail base frame 3 and is not fixed at all to the floor surface FL or the lower wall surface W'. Therefore, the installation of the side frame opening prevention member 7 does not affect the waterproof layer 10.

[0038] [C-2] Second embodiment A side frame opening prevention means according to the second embodiment will be described with reference to FIGS. 11 to 13. The side frame opening prevention means according to the second embodiment comprises a first side frame opening prevention member 8 and a second side frame opening prevention member 9. As shown in FIG. 12, the first side frame opening prevention member 8 comprises a vertical surface portion 81 extending in the projection direction, a tip end flap 82, a base end flap 83, and an upper surface portion 84. A slit 842 is formed in the upper surface portion 84 located closer to the base end than the center in the projection direction, dividing the upper surface portion 84 into a first portion 840 on the tip end side and a second portion 841 on the base end side. The lower portion of the tip end flap 82 forms a narrow portion 820. The first side frame opening prevention member 8 essentially has a configuration in which the bottom surface portion 70 of the side frame opening prevention member 7 has been removed.

[0039] The first side frame opening prevention member 8 is connected to the guide rail base frame 3. As shown in FIG. 11 , the tip end end piece 82 of the first side frame opening prevention member 8 is connected by a blind rivet 85 while abutting against the tip end end edge 33 of the guide rail base frame 3, and the base end end piece 83 of the first side frame opening prevention member 8 is connected by a blind rivet 86 while abutting against the base end end edge 35 of the guide rail base frame 3. The middle end edge 36 of the guide rail base frame 3 is inserted through a slit 842 in the top surface portion 84 of the first side frame opening prevention member 8. The vertical surface portion 81 of the first side frame opening prevention member 8 faces the inner surface of the side edge 30 of the guide rail base frame 3 at a distance. In the illustrated embodiment (see Figure 11), the lower end of the first side frame opening prevention member 8 is located slightly above the lower end of the guide rail base frame 3, but it may also extend to the lower end of the guide rail base frame 3.

[0040] 13, the second side frame opening prevention member 9 has a bottom surface portion 90, which extends in the projection direction as a whole and is composed of a projection portion 90A on which the lower end of the guide rail base frame 3 rests, and a tip portion 90B which extends inward in the projection direction from the tip side of the projection portion and on which the lower end of the guide rail 4 rests. The projection portion 90A of the bottom surface portion 90 is composed of a wide portion on the base end side, a wide portion on the tip side, and a narrow portion between the wide portions, with a first raised piece 91 that rises vertically from the inner projection edge of the narrow portion and a second raised piece 92 that rises vertically from the inner projection edge of the wide portion on the tip side, the second raised piece 92 being located on the outside side and inside (the side closer to the opening) of the first raised piece 91. The tip end portion 90B of the bottom surface portion 90 has an outer facing edge, an inner facing edge, and a facing edge, and a rising piece 93 is integrally formed at the corner between the outer facing edge and the facing edge, located at the tip end portion (the side closer to the opening) of the outer facing edge.

[0041] The second side frame opening prevention member 9 is connected to the guide rail base frame 3. As shown in Fig. 11, the second side frame opening prevention member 9 has a first rising piece 91 abutting against the inner surface of the side edge 30 of the guide rail base frame 3 and fixed with a screw 910, and a second rising piece 92 which is fastened together with the connecting edge 46 of the guide rail 4 and the connected edge 34 of the guide rail base frame 3, which are in abutting state, by a screw 47.

[0042] The wide and narrow portions at the base end of the projection portion 90A of the bottom portion 90 of the second side frame opening prevention member 9 cover the lower end of the guide rail base frame 3, the wide portion at the tip end of the projection portion 90A covers the lower end of the connection between the guide rail base frame 3 and the guide rail 4, the tip end portion 90B of the bottom portion 90 covers the lower end of the guide rail 4, and the raised piece 93 abuts or is close to the tip end portion (the side closer to the opening) of the outer surface of the side edge 40 of the guide rail 4.

[0043] In the second embodiment, the tip end facing piece 82 and base end facing piece 83 of the first side frame opening prevention member 8 are connected to the tip end facing edge 33 and base end facing edge 35 of the side edge 30 of the guide rail base frame 3, the vertical surface portion 81 of the first side frame opening prevention member 8 extends parallel to and spaced apart from the side edge 30 of the guide rail base frame 3, and the first raised piece 91 of the second side frame opening prevention member 9 is connected in abutting contact with the side edge 30 of the guide rail base frame 3, thereby restricting the bending of the side edge 30 of the guide rail base frame 3 and preventing the side frames from opening. Furthermore, the rising piece 93 on the bottom surface portion 90 of the second side frame opening prevention member 9 fixed to the guide rail base frame 3 abuts or is close to the lower end portion of the tip side portion (the side closer to the opening) of the side edge 40 of the guide rail 4, so the rising piece 93 resists the force in the direction of opening the side frame, preventing the side frame (side edge 30) from opening. The first side frame opening prevention member 8 and the second side frame opening prevention member 9 are fixed only to the guide rail base frame 3, and are not fixed at all to the floor surface FL or the lower wall surface W'. Therefore, the installation of the first side frame opening prevention member 8 and the second side frame opening prevention member 9 does not affect the waterproof layer 10.

[0044] [D] Third embodiment [D-1] First aspect A first aspect of the third embodiment of the side frame opening prevention means will be described with reference to Figures 14 and 15. As shown in Figure 15, the side frame opening prevention member 13 comprises a triangular bottom surface portion 130, a first rising piece 131 rising from the projected edge of the bottom surface portion 130, and a second rising piece 132 rising from the base edge of the bottom surface portion 130. The side frame opening prevention member 13 is fixed to the lower end portion of the guide rail base frame 3 and to the outer wall W. More specifically, the side frame opening prevention member 13 is fixed by a screw 1310 with the first rising piece 131 abutting the outer surface of the side edge 30, and is fastened to the outer wall W by a screw 1320 with the second rising piece 132 abutting the fixed edge 31. In the first aspect, no waterproof layer is provided in the lower portion of the outer wall W.

[0045] [D-2] Second mode A second aspect of the third embodiment of the side frame opening prevention means will be described with reference to Figures 16 and 17. The second aspect comprises a first side frame opening prevention member 14 and a second side frame opening prevention member 15. As shown in Figure 17, the first side frame opening prevention member 14 comprises a triangular bottom surface portion 140, a first rising piece 141 rising from the projected edge of the bottom surface portion 140, and a second rising piece 142 rising from the base end edge of the bottom surface portion 140. As shown in Figure 16, the second side frame opening prevention member 15 comprises a bottom surface portion 150 and a rising piece 151 rising from the bottom surface portion 150 and extending in the projected direction. The first side frame opening prevention member 14 is fixed to the lower end portion of the guide rail base frame 3 and the outer wall W. The second side frame opening prevention member 15 is fixed to the lower end portion of the guide rail base frame 3. More specifically, a raised piece 151 abuts against the inner surface of the side edge 30, and the first side frame opening prevention member 14 is fixed by a screw 1410 with the first raised piece 141 abutting against the raised piece 151 abutting against the inner surface of the side edge 30, and is fixed by a screw 1420 with the second raised piece 142 abutting against the outer wall W. [Explanation of symbols]

[0046] 3 Guide rail base frame (side frame) 30 Side (prospective side) 31 Fixed Edge 33 Tip side edge (first edge) 35 Base end side (second side) 4 Guide rail (side frame) 40 Side (outdoor facing surface) 5. Shutter Curtain 6 Shutter case (shutter storage section) 60 Inner lintel 7 Side frame opening prevention member (side frame opening prevention means) 70 Bottom part 71 Vertical surface part (expected piece) 72 Tip end piece (first end piece) 73 Base end end piece (second end piece) 74 Top part 7400 First section prospective edge (prospective edge) 7410 Second section of the prospective edge (prospective edge) 75 Rising piece 8. First side frame opening prevention member (side frame opening prevention means) 81 Vertical surface section 82 Tip end piece 83 Base end piece 84 Top part 9 Second side frame opening prevention member (side frame opening prevention means) 90 Bottom part 93 Rising piece 10 waterproof layer FL floor (ground) W External wall (framework) W´ Lower wall S window sash

Claims

1. A window shutter in which a shutter curtain opens and closes a space formed by a shutter storage section provided in a cantilevered shape on the main body, the left and right side frames, and the floor, Each side frame is provided with a side frame opening prevention means at least at the lower portion thereof, The side frame is A prospective edge extending in a direction away from the building body; a first visible edge protruding toward the space at a tip end side of the visible edge; a second visible side protruding toward the space at a base end side of the visible side; Equipped with The side frame opening prevention means includes a front edge piece, a first front edge piece on the tip end side of the front edge piece, and a second front edge piece on the base end side of the front edge piece, The first facing piece of the side frame opening prevention means is abutted against and connected to the first facing edge of the side frame, the second facing piece of the side frame opening prevention means is abutted against and connected to the second facing edge of the side frame, and the facing piece of the side frame opening prevention means extends along the facing edge of the side frame. Window shutters.

2. A window shutter in which a shutter curtain opens and closes a space formed by a shutter storage section provided in a cantilevered manner on the main body, the left and right side frames, and the floor, Each side frame is provided with a side frame opening prevention means at least at the lower portion thereof, The projection piece of the side frame opening prevention means faces the projection edge of the side frame at a distance, The upper end of the side frame opening prevention means is provided with an upper surface portion that closes the hollow portion of the side frame opening prevention means, The projected edge of the upper surface portion abuts or is close to the projected side of the side frame. Window shutters.

3. The side frame opening prevention means is connected to the side frame in a state close to or in contact with the floor surface.

3. A window shutter according to claim 1 or 2.

4. the side frame opening prevention means has a bottom surface portion that is close to or abuts against the lower end of the side frame to close the lower end of the side frame, The bottom surface has a raised piece formed thereon that abuts against or is close to the lower end of the exterior facing surface of the side frame. A window shutter according to any one of claims 1 to 3.

5. The bottom surface portion is integrally formed at the lower end of the projection piece of the side frame opening prevention means.

5. A window shutter according to claim 4.

6. The side frame comprises a guide rail base frame provided in a corrugated shape on the main body, and a guide rail attached to the tip of the guide rail base frame, The guide rail base frame has the first visible edge, the second visible edge, and the visible edge, and the side frame opening prevention means is connected to the guide rail base frame, The rising piece abuts or is close to the lower end of the outdoor facing surface of the guide rail. A window shutter according to any one of claims 4 and 5 (limited to claims dependent on claim 1).

7. The window shutter is installed on the outdoor side of the window sash, The floor surface is located below the window sash, At least a lower portion of the side frame opening prevention means is located lower than the window sash. A window shutter according to any one of claims 1 to 6.

8. A window shutter in which a shutter curtain opens and closes a space formed by a shutter storage section provided in a cantilevered shape on the main body, the left and right side frames, and the floor, Each side frame is provided with a side frame opening prevention means at least at the lower portion thereof, the side frame opening prevention means has a bottom surface portion that is close to or abuts against the lower end of the side frame to close the lower end of the side frame, The bottom surface has a raised piece formed thereon that abuts against or is close to the lower end of the exterior facing surface of the side frame. Window shutters.

9. A window shutter in which a shutter curtain opens and closes a space formed by a shutter storage section provided in a cantilevered shape on the main body, the left and right side frames, and the floor, The side frame comprises a guide rail base frame provided in a corrugated shape on the main body, and a guide rail attached to the tip of the guide rail base frame, A side frame opening prevention means is provided at the lower portion of the guide rail base frame, The projection piece of the side frame opening prevention means faces the projection edge of the guide rail base frame at a distance. Window shutters.

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