Case angle mounting structure

Abstract

To provide a fitting structure of a case angle capable of holding a shutter curtain stably even when a hook fitting deforms due to heat during a fire.SOLUTION: A fitting structure to an intermediate hook fitting 13 of a case angle (a first case angle 63) supporting a shutter case 6 comprises a surface part 130 fixed to the intermediate hook fitting 13 skeleton, a latched piece 131 integrated with an upper end of the surface part 130, and a locked part (a lower edge of an opening 132) situated at a lower part of the latched piece 131 and formed at the surface part 130, and an upper part of the first case angle 63 is latched to the latched piece 131 and its lower part (a support member 14) is locked to the locked part (lower edge of the opening 132).SELECTED DRAWING: Figure 17

Description

Technical Field

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[0001] The present invention relates to an attachment structure for a case angle in a shutter device.

Background Art

[0002] A window shutter is a shutter that opens and closes the outdoor space of a window opening. It includes left and right guide rails attached to left and right guide rail base frames provided in a protruding manner on the housing, a shutter case provided in a protruding manner on the housing, and a shutter curtain that can be wound around a winding shaft provided in the shutter case. Both end portions in the width direction of the shutter curtain are guided by the left and right guide rails to open and close the outdoor space of the window opening.

[0003] In a window shutter, the shutter case includes a framework composed of left and right brackets and a plurality of case angles extending in the width direction of the case so as to span between the left and right brackets. By attaching a case plate to the framework, it is assembled as a shutter case, and both end portions in the length direction of the upper and housing-side case angles are hooked on a hooking fitting fixed to the housing, thereby attaching the shutter case to the housing (Patent Document 1).

[0004] However, the case angle is a long member extending in the width direction of the case. If the middle portion in the length direction of the case angle is bent, it may affect the proper holding of the shutter case. Also, even when considering hooking the middle portion in the length direction of the case angle on a hooking fitting, if the hooking fitting undergoes thermal deformation due to heat during a fire, the hooked state between the hooking fitting and the case angle may be disengaged, leading to the risk of the shutter case falling or toppling.

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] The present invention aims to provide a mounting structure for a case angle that can stably hold a shutter curtain even if the hooking hardware is deformed due to heat during a fire or the like. [Means for solving the problem]

[0006] The technical means employed in this invention are: A mounting structure for a case angle that supports a shutter case, The aforementioned hook fitting comprises a surface portion fixed to the building structure, a hooking piece integrally formed at the upper end of the surface portion, and a locking portion formed on the surface portion located below the hooking piece. The upper side of the case angle is hooked onto the retaining piece, and the lower side is hooked onto the retaining portion. This is the mounting structure for the case angle. In one embodiment, the case angle is supported from the building structure at both ends and in the middle in the longitudinal direction. The intermediate portion of the case angle is attached to the hook fitting.

[0007] In one embodiment, the case angle comprises a rear portion that is spaced apart from the front portion of the hook fitting, an upper piece at the upper end of the rear portion, and a lower piece at the lower end of the rear portion. A support member is fixed to the rear portion, and the support member has a lower portion located below the lower piece of the case angle. The lower portion of the support member is locked to the locking portion.

[0008] In one embodiment, the lower portion of the support member comprises an inclined piece that slopes downward so as to move away from the building structure, and a lower piece that extends toward the building structure from the lower end of the inclined piece. The locking portion is the lower edge of the opening formed on the surface of the hook fitting, The end of the lower piece of the support member on the building structure side is locked to the lower edge.

[0009] In one embodiment, the lower portion of the support member comprises an inclined piece that slopes downward so as to move away from the building structure, and a lower piece that extends toward the building structure from the lower end of the inclined piece. The locking portion is a protruding piece formed in a rising shape on the surface portion, The end of the lower piece of the support member that is furthest from the building structure is supported by the upper end of the protruding piece. In one embodiment, the end of the lower piece of the support member on the building structure side is a bent piece that extends downward, The protruding piece rises from the lower end of the opening formed in the surface, and the bent piece is located within the opening. [Effects of the Invention]

[0010] In the mounting structure for a case angle supporting a shutter case according to the present invention, the case angle is made less likely to come off the hook fitting by hooking the upper side of the case angle to the hooking piece and the lower side to the locking piece of the hook fitting, which has a hooking piece and a locking part. [Brief explanation of the drawing]

[0011] [Figure 1] This is a longitudinal cross-sectional view of the window shutter according to this embodiment. [Figure 2] This is a cross-sectional view of the window shutter according to this embodiment. [Figure 3] This is a vertical cross-sectional view of the shutter storage section of the window shutter (fully open) according to this embodiment. [Figure 4] This is a vertical cross-sectional view of the lower portion of the window shutter according to this embodiment. [Figure 5] This is a magnified view of a portion of Figure 4, showing the slats to which the handles are attached. [Figure 6] This figure shows the lower part of a front view of a window shutter in the fully closed position, as seen from the inside. [Figure 7] This is a diagram showing the handle. [Figure 8] It is a figure showing a seat plate according to the first embodiment. [Figure 9] It is a figure showing a seat plate according to the second embodiment. [Figure 10] It is a figure showing a seat plate according to the third embodiment. [Figure 11] It is a figure showing a support structure of a case angle using an end hooking fitting. [Figure 12] It is a figure showing a support structure of a case angle using an intermediate hooking fitting according to the first embodiment (first embodiment). [Figure 13] It is a front view showing a support structure of a case angle using an end hooking fitting and an intermediate hooking fitting according to the first embodiment (first embodiment). [Figure 14] It is a figure showing an intermediate hooking fitting according to the first embodiment. [Figure 15] The upper figure shows a support member attached to the case angle of the support structure of the case angle according to the first embodiment. The lower figure shows a support member attached to the case angle of the support structure of the case angle according to the second embodiment. [Figure 16] The upper figure shows a case angle assembly of the support structure of the case angle according to the first embodiment. The lower figure shows a case angle assembly of the support structure of the case angle according to the second embodiment. [Figure 17] It is a figure showing a support structure of a case angle using an intermediate hooking fitting according to the second embodiment (second embodiment). [Figure 18] It is a front view showing a support structure of a case angle using an end hooking fitting and an intermediate hooking fitting according to the second embodiment (second embodiment). [Figure 19] It is a figure showing an intermediate hooking fitting according to the first embodiment. [Figure 20] It is a side view of the lower part of the side frame and shows a gap formed in the lower part. [Figure 21] It is a cross-sectional view of the lower part of the side frame and is a view seen from below. [Figure 22]This is a side view of the lower part of the side frame, showing the gap-sealing means (first embodiment) according to the first embodiment. [Figure 23] This is a side view of the lower part of the side frame, showing the gap-sealing means (second embodiment) according to the first embodiment. [Figure 24] This is a cross-sectional view corresponding to Figure 22. [Figure 25] The figure on the right shows the first component, and the figure on the left shows the second component. [Figure 26] The diagram shows a gap-sealing means formed by combining a first member and a second member. The right diagram shows a first embodiment having a first height dimension, and the left diagram shows a second embodiment having a second height dimension that is higher than the first height dimension. [Figure 27] This is a side view of the lower part of the side frame, showing the gap-sealing means (first embodiment) according to the second embodiment. [Figure 28] This is a cross-sectional view corresponding to Figure 27. [Figure 29] This is a side view of the lower part of the side frame, showing the gap-sealing means (second embodiment) according to the second embodiment. [Figure 30] These are cross-sectional views corresponding to Figure 29. The upper view shows the state in which the depth dimension of the gap-sealing means has been determined, while the lower view shows the state in which the depth dimension of the gap-sealing means has been fixed. [Figure 31] The left diagram shows the first component, and the right diagram shows the second component. [Figure 32] The diagram shows a gap-sealing means formed by combining a first member and a second member. The left diagram shows a first embodiment with a first depth dimension, and the right diagram shows a second embodiment with a second depth dimension that is larger than the first depth dimension. [Figure 33] This is a side view of the lower part of the side frame, showing the state before the gap is sealed by the gap-sealing means according to the third embodiment. [Figure 34] This is a cross-sectional view corresponding to Figure 33. [Figure 35] This is a side view of the lower part of the side frame, showing the state in which the gap is sealed by the gap-sealing means according to the third embodiment. [Figure 36]These are cross-sectional views corresponding to Figure 35. The upper view shows the state in which the depth dimension of the gap-sealing means has been determined, while the lower view shows the state in which the depth dimension of the gap-sealing means has been fixed. [Figure 37] (A) shows the first unit (with the second element in an upward position), (B) shows the second unit (with the fourth element in an upward position), and (C) shows a gap-filling means formed by combining the first and second units (with the second and fourth elements in an upward position). [Figure 38] (A) represents the second element of the first unit, (B) represents the first element of the first unit, (C) represents the fourth element of the second unit, and (D) represents the third element of the second unit. [Figure 39] The diagram shows a gap-filling means formed by combining the first and second units. The left diagram shows the state before extension in the height and depth directions, and the right diagram shows the state after extension in the height and depth directions. [Modes for carrying out the invention]

[0012] [A] Overall configuration of window shutters Embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 is a side view of a window shutter in the fully closed position according to this embodiment, and Figure 2 is a cross-sectional view of the same window shutter. The window shutter is a shutter installed on the outdoor side of a window device, and the window device according to this embodiment is a so-called sliding door window. The sliding door window includes, for example, two sliding doors or folding doors that open and close the window opening, and the lower ends of the window opening and doors reach near the lower end of the indoor space. The outdoor side of the window opening is a balcony. The outdoor side of the window opening may be a terrace on the first floor of the building.

[0013] The window shutter comprises left and right brackets 1 located above the window opening and attached to the building structure (exterior wall W) in an overhanging manner, a winding shaft 2 supported between the left and right brackets 1, guide rail base frames 3 attached to the exterior wall W in an overhanging manner in the direction of the opening width, left and right guide rails 4 supported by the guide rail base frames 3 in the direction of the opening width, a shutter curtain 5 whose upper end is connected to the winding shaft 2, and which, when wound up / unwound on the winding shaft 2, moves up and down with both ends in the width direction guided by the guide rails 4 to open and close the outdoor space of the window opening, and a shutter case 6 located above the window opening and attached to the exterior wall W in an overhanging manner, which houses the shutter curtain 5 wound up on the left and right brackets 1 and the winding shaft 2. The window shutter according to this embodiment is manually operated, and the window opening is opened and closed by manually raising and lowering the shutter curtain 5.

[0014] The shutter curtain 5 of the window shutter is designed to close off the outdoor space of the window device formed in the building's structure. The space opened and closed by the window shutter is the space enclosed by the bottom surface of the shutter case 6, the left and right side frames (guide rail base frame 3 + guide rail 4), and the balcony floor surface FL. In other words, the window shutter according to this embodiment does not have a drip plate (bottom frame).

[0015] The shutter curtain 5 is formed by connecting elongated slats 50 extending in the width direction of the opening, with a base plate 7 at the lower end. The shutter curtain 5 opens and closes the opening by moving up and down as both ends of the slats 50 in the width direction are guided in grooves of the guide rail 4, and when the opening is fully closed, the base plate 7 at the lower end rests on the floor surface FL. The balcony floor surface FL according to this embodiment is gently sloped downward from the indoor side to the outdoor side. When the opening is fully open, the shutter curtain 5 is stored in the shutter case 6 in a wound state, wound on the winding shaft 2 (see Figure 3). The window shutter according to this embodiment is manually operated, and the winding shaft 2 is equipped with a balance spring (not shown).

[0016] As shown in Figure 1, in this embodiment, the lower portions of the balcony floor surface FL and the left and right side frames (guide rail base frame 3 + guide rail 4) are located below the lower end of the window opening, and a lower wall surface W' is formed vertically at the indoor end of the floor surface FL. In this embodiment, the lower wall surface W' is located on the indoor side of the exterior wall W to which the guide rail base frame 3 and shutter case 6 are attached. A waterproof layer 20 is formed in a cross-sectional L shape from the floor surface FL to the lower wall surface W'. A space is formed between the exterior wall W and the lower wall surface W'. This space may be closed by a sealing mechanism, the details of which will be described later.

[0017] In the window device 8, the window sash frame that forms the window opening is made up of an upper frame 80, a lower frame 81, and left and right vertical frames 82 and 83, and the window opening is opened and closed by two sliding door bodies 84 and 85. A screen door 86 is provided on the outdoor side of the window sash frame. As shown in Figure 1, in this embodiment, the outdoor door body 84 is located on the outdoor side of the lower wall surface W', and approximately half of the depth direction of the lower frame 81 is projected outwards from the lower wall surface W'.

[0018] [B] Manual operation mechanism The window shutter according to this embodiment is manually operated, and the shutter curtain 5 is raised and lowered by manual operation to open and close the opening. When the opening is fully open (see Figure 3), the indoor window opening is opened at least partially (the door body 84 is partially opened), and initial force is applied manually to move the base plate 7 downward, pulling the shutter curtain 5 downward. The shutter curtain 5, which is in the retracted state, is unwound with the rotation of the winding shaft 2 and closed manually. When it has descended to near fully closed, the shutter curtain 5 is pushed downward manually, causing the base plate 7 of the shutter curtain 5 to touch the ground and the opening to be in the fully closed position.

[0019] As the shutter curtain 5 descends, the balance spring biases the winding shaft 2 in the direction that winds up the shutter curtain 5 (the upward direction of the shutter curtain 5). When the bottom plate 7 of the shutter curtain 5 touches the ground and the curtain is in the fully closed position, the locking device 11 is activated and the curtain is locked, restricting the upward movement of the shutter curtain 5.

[0020] In the locked state, the shutter curtain 5, which is in the fully closed position, is biased upward (winding direction) (so-called "upward bias"). By pulling the string-like member 114 upward and rotating the lever 113 upward to unlock the locking device 11, the force pulling the string-like member 114 upward applies an initial force (upward direction) to the shutter curtain 5. Due to the biasing force of the balance spring, the shutter curtain 5 is wound onto the winding shaft 2 and rises, and by manually releasing the shutter curtain 5, it reaches the fully open position.

[0021] In this embodiment, since the lower part of the floor surface FL and the side frame (guide rail base frame 3 + guide rail 4) is located below the window opening, the shutter curtain 5 includes an upper part 5A located above the lower end of the window opening and a lower part 5B located below the lower end of the window opening when the window shutter is in the fully closed position (see Figure 1). Furthermore, since the gap between the lower frame 81 of the window sash frame and the shutter core (the vertical plane on which the shutter curtain 5 is located in the raised or fully closed position) is limited, it is difficult to manually push the base plate 7 down to the floor surface FL by inserting a hand into the gap between the slat 50 and the lower frame 81. In other words, if a hand cannot be inserted into the gap between the lower frame 81 of the window sash frame and the slat 50 when the shutter is near fully closed, it becomes difficult to push it to the fully closed position.

[0022] In this embodiment, a handle 9 is provided on the indoor side of a predetermined slat 50 that forms the upper portion 5A of the shutter curtain 5. When the shutter curtain 5 is lowered, the handle 9 can be moved downward by hand from the window opening. When the bottom plate 7 of the shutter curtain 5 is in contact with the floor, the handle 9 and the slat 50 on which the handle 9 is provided are located above the window opening (above the lower frame 81). That is, by placing a hand on the handle, the slat can be pushed downward to fully close the shutter curtain. In this embodiment, the handle 9 is provided on the fourth slat 50 from the bottom (see Figure 4). The handle 9 in this embodiment is made of steel (stainless steel, etc.).

[0023] Figure 3 shows the retracted state of the shutter curtain 5 when the opening is fully open. The shutter curtain 5 is retracted onto the retraction shaft 2 such that when the opening is fully closed, the outdoor side of the slats 50 is closer to the retraction shaft 2 and the indoor side is further away from the retraction shaft 2.

[0024] As shown in Figure 3, the shutter curtain 5, when fully open and retracted, includes the outermost portion 5C that extends from the top (the part closest to the top surface of the shutter case) to the base plate 7 located on the bottom surface of the shutter case 6, and the handle 9 is provided on the indoor side of the slat 50 that forms the upper portion 5A and the outermost portion 5C. By selecting the handle 9 from the slat 50 that forms the outermost portion 5C, the handle 9 does not come into contact with the top plate 60 or front plate 61 of the shutter case 6 when the shutter curtain 5 is retracted, and does not interfere with the retraction of the slat 50.

[0025] The handle 9 is positioned offset towards the widthwise end of the slat 50 relative to its widthwise center (closer to one of the guide rails 4), allowing for manual operation from inside the room when the window opening is partially open (by opening the door body 84). In this embodiment, the handle 9 is located above the lever 113 of the locking device provided on the base plate 7. That is, the lever 113 of the locking device is also positioned offset towards the widthwise end of the slat 50 relative to its widthwise center (closer to one of the guide rails 4).

[0026] The locking device 11 is equipped with locking pieces 11A that can extend and retract from both ends of the base plate 7 in the longitudinal direction. When the opening is fully closed, the locking pieces 11A contact the locking piece 11B in the guide groove from below, thereby locking the device (see Figures 2 and 6). More specifically, the locking device 11 includes left and right latch bars 110 and 111, each equipped with a locking portion 11A at its tip, and an operating section 112 provided at the base ends of the left and right latch bars 110 and 111, which has an operating mechanism that slides the latch bars 110 and 111 between an extended position and a retracted position. The latch bars 110 and 111 are slidable within a latch bar housing section 700 that extends in the visible width direction on the surface of the base plate 7. The locking pieces are biased by a spring to maintain the extended position, and in conjunction with the upward rotation of the lever 113 of the operating section 112, the balance spring is compressed, the locking pieces retract, and the locked state is released.

[0027] The base end of a string-like member 114 is connected to the lever 113, and a gripping portion 115 is provided at the tip of the string-like member 114. The gripping portion 115 is provided with a magnet as a means of attachment. The magnet of the gripping portion 115 is magnetically attached, for example, to a slat 50 on which a handle 9 is provided, adjacent to the handle 9, and when the opening is fully closed, the gripping portion 115 is located above the lower frame 81 of the window opening. The slat 50 to which the gripping portion 115 is magnetically attached is not limited to the slat 50 on which the handle 9 is provided, but may be any other slat 50 that constitute the upper portion 5A located above the lower end of the window opening. When the window shutter is to be opened while the opening is fully closed, grasp the gripping part 115 and pull the string-like member 114 upward. This causes the lever 113 to rotate upward, releasing the lock. Simultaneously, an initial upward force is applied to the shutter curtain 5. The shutter curtain 5 is then wound onto the winding shaft 2 by the biasing force of the balance spring and rises. By holding the bottom plate 7 and lifting the shutter curtain 5, the window shutter is opened.

[0028] The handle 9 is fixed to the indoor side of a predetermined slat 50 by fixing means. The slat 50 according to this embodiment consists of a curved plate-shaped main body 500, an upper interlock portion 501 integrally formed at the upper end of the main body 500, and a lower interlock portion 502 integrally formed at the lower end of the main body 500. The main body 500 has a dish-shaped cross-section and is curved to bulge outwards towards the indoor side. The upper and lower portions of the main body 500 of the slat 50 are located on the outdoor side (farther from the building structure) than the central portion, that is, the central portion is located on the indoor side (closer to the building structure) than the upper and lower portions.

[0029] As shown in Figures 5 and 7, the handle 9 according to this embodiment consists of an upper horizontal piece 90, a lower horizontal piece 91, a vertical surface portion 92, a main body having a U-shape in cross-section, and a handle piece 93 extending horizontally from the vertical surface portion 92 to the side opposite to the upper horizontal piece 90 and the lower horizontal piece 91.

[0030] The handle 9 is fixed to the indoor side of the slat 50 by fixing means, with the upper horizontal piece 90 in contact with or locked to the upper part of the main body 500 (the base end of the upper interlock part), and the lower horizontal piece 91 in contact with or locked to the lower part of the main body 500 (which may be the base end of the lower interlock part), and the vertical surface 92 in contact with the central part of the main body 500.

[0031] The handle 9 contacts the slat 50 at three points: the tip of the upper horizontal piece 90 is locked to the upper part of the main body 500, the tip of the lower horizontal piece 91 is locked to the lower part of the main body 500, and the vertical surface 92 is connected to the central part of the main body 500. When the handle piece 93 of the handle 9 is pushed downward, the downward force is transmitted to the slat 50 well and stably, and no uneven force is applied to the handle 9, resulting in good durability of the handle 9.

[0032] The fixing means according to this embodiment consists of a flat screw 94 and a cap nut 95, and by keeping the depth of the fixing means to a minimum, the fixing means does not interfere with the winding up and down of the shutter curtain 5 and the lintel portion (in Figure 3, the opening formed between the lower plate 62 of the shutter case 6 and the lower plate 67 on the building structure side). In a side view of the slat 50 to which the handle 9 is attached, the flat screw 94 is contained within the thickness of the main body portion 500, and the cap nut 95 is contained inside the handle piece 93 of the handle 9.

[0033] In the manual closing mechanism configured as described above, when opening the window shutter from a fully closed state, the door body 84 of the window device 8 is opened, and the gripping part 115 is grasped from the window opening and the string-like member 114 is pulled upward. This causes the lever 113 to rotate upward, releasing the lock state. Simultaneously, an initial upward force is applied to the shutter curtain 5, and the shutter curtain 5 rises as it is wound onto the winding shaft 2 by the biasing force of the balance spring. By applying an upward force to lift the base plate 7 upward as appropriate, the window shutter is opened. To close the window shutter from a fully open position, open the door body 84 of the window device 8, place your hand on the indoor side of the flat portion 71 of the base plate 7 from the window opening, and manually lower the base plate 7 and slats 50 by applying initial force to pull them downward. After the base plate 7 has lowered below the lower frame 81 of the window opening, place your hand on the handle 9 from the window opening and push the slats 50 downward to fully close the shutter.

[0034] [C] Seat structure [C-1] First Embodiment As shown in Figure 8, the seat plate 7 according to the first embodiment is a long member extending in the opening width direction, and consists of a vertical portion 70 and a flat portion 71 integrally formed at the lower end of the vertical portion 70, and has a cross-sectional shape that is generally inverted T-shaped. The vertical portion 70 has a thickness smaller than the groove width of the guide rail 4 and has a visible width dimension (length dimension) in which both ends in the longitudinal direction are located within the groove of the guide rail 4. The flat portion 71 has a predetermined depth width extending in the indoor-outdoor direction, and both ends in the visible width direction are located outside the guide rail 4. The vertical portion 70 of the seat plate 7 is located on the shutter core, and the flat portion 71 is divided into an outdoor side portion and an indoor side portion with the shutter core in between, and in the illustrated embodiment, the depth dimension of the outdoor side portion is larger than the depth dimension of the indoor side portion.

[0035] On the indoor side of the vertical section 70, a latch bar housing section 700 is formed extending in the visible width direction (length direction) of the base plate 7, and the housing section 700 houses left and right latch bars 110 and 111, each having a locking portion 11A at its tip. An operating section 112 is provided on the side of the housing section 700 that is closer to one of the guide rails 4. On the outdoor side of the vertical section 70, stoppers 701 are provided on the left and right sides in the width direction, each having a horizontal contact surface (upper surface), and when the opening is fully open, the contact surface of the stopper 701 contacts the lower surface (lower plate 62) of the shutter case 6 (Figure 3).

[0036] The flat section 71 consists of a horizontal upper surface 710, thick outdoor hanging pieces 711 and indoor hanging pieces 712 that hang integrally from the outdoor and indoor ends of the upper surface 710, respectively, and a mounting section (pocket section) 713 for a cushioning member 714 formed midway along the width direction (front-to-back direction) of the upper surface. The upper end portion of the fin-shaped cushioning member 714, which extends in the width direction (length direction of the seat plate 7), is mounted in the mounting section 713. The cushioning member 714 has a relatively large height dimension so that it can deform to follow the slope of the floor surface FL. A cover member 715 is attached to the longitudinal end of the flat section 71 of the seat plate 7.

[0037] [C-2] Second Embodiment As shown in Figure 9, the seat plate 7 according to the second embodiment is a long member extending in the opening width direction, and consists of a vertical portion 70 and a flat portion 72 integrally formed at the lower end of the vertical portion 70, and has a cross-sectional shape that is generally inverted T-shaped. The vertical portion 70 has a thickness smaller than the groove width of the guide rail 4 and has a visible width dimension (length dimension) in which both ends in the length direction are located within the groove of the guide rail 4. The flat portion 72 has a predetermined depth extending in the indoor-outdoor direction, and both ends in the visible width direction are located outside the guide rail 4. The vertical portion 70 of the seat plate 7 is located on the shutter core, and the flat portion 72 is divided into an outdoor side portion and an indoor side portion with the shutter core in between, and in the illustrated embodiment, the depth dimension of the outdoor side portion is larger than the depth dimension of the indoor side portion.

[0038] On the indoor side of the vertical section 70, a latch bar housing section 700 is formed along the length direction (opening width direction) of the base plate 7, and the housing section 700 houses left and right latch bars 110 and 111, each having a locking portion 11A at its tip. An operating section 112 is provided on the side of the housing section 700 that is closer to one of the guide rails 4. On the outdoor side of the vertical section 70, stoppers 701 are provided on the left and right sides in the width direction, each having a horizontal contact surface (upper surface), and when the opening is fully open, the contact surface of the stopper 701 contacts the lower surface (lower plate 62) of the shutter case 6 (Figure 3).

[0039] The flat section 72 has a hollow section extending in the visible width direction (length direction) of the base plate 7, and a long reinforcing member 73 extending in the visible width direction of the flat section 72 is provided in the hollow section. The reinforcing member 73 has a U-shape in cross-section, consisting of an upper surface section 730 and an outdoor hanging piece 731 and an indoor hanging piece 732 that hang integrally from the outdoor and indoor ends of the upper surface section. The cross-sectional shape of the reinforcing member 73 is not limited and may be, for example, a long plate of a predetermined thickness. The central part of the reinforcing member 73 in the depth direction is located on the shutter core.

[0040] In this embodiment, the seat plate 7 is made of aluminum, and the reinforcing material 73 is made of a metal with a higher melting point than aluminum (for example, steel). By providing the reinforcing material 73 on the flat portion 72 of the seat plate 7, even if the seat plate 7 attempts to deform due to the heat of a fire, the reinforcing material 73 suppresses thermal deformation (warping), thereby preventing as much as possible the formation of a gap between the seat plate and the floor surface FL that would be disadvantageous from a fire prevention standpoint.

[0041] The flat section 72 comprises a horizontal upper section 720, thick outdoor hanging pieces 721 and indoor hanging pieces 722 that hang integrally from the outdoor and indoor ends of the upper section 720, respectively, an intermediate hanging piece 723 that hangs from the upper section 720 spaced apart from the outdoor hanging piece 721, and a lower section 724 that horizontally connects the intermediate vertical piece 723 and the indoor hanging piece 712. A hollow section is formed from the upper section 720, the intermediate hanging piece 723, the indoor hanging piece 722, and the lower section 724, and a reinforcing member 73 is provided in the hollow section. By housing the reinforcing member 73 in the hollow section, it can be installed on the seat plate 7 without fixing the reinforcing member 73.

[0042] In the illustrated embodiment, the hanging dimension of the intermediate hanging piece 723 is shorter than that of the outdoor hanging piece 721 and the indoor hanging piece 722. The lower end of the intermediate hanging piece 723 is located slightly above the lower ends of the outdoor hanging piece 721 and the indoor hanging piece 722, and the lower surface portion 724 is also located slightly above the lower end of the indoor hanging piece 722. The method of forming the hollow portion is not limited to the illustrated embodiment.

[0043] A mounting portion (pocket portion) 725 for the cushioning member is formed midway along the depth direction (front-to-back direction) of the lower surface portion 724 of the flat portion 72, and the upper end portion of a fin-shaped cushioning member 726 extending in the width direction (length direction of the seat plate 7) is mounted on the mounting portion 725. In the illustrated embodiment, the cushioning member 726 is smaller in dimensions than the cushioning member 714, but the shape and dimensions of the cushioning member 726 are not limited and may be as long as the cushioning member 714. A cover member 727 is attached to the end of the flat portion 72 of the seat plate 7 in the length direction, closing the end of the hollow portion in the width direction.

[0044] [C-3] Third Embodiment As shown in Figure 10, the seat plate 7 according to the third embodiment is a long member extending in the opening width direction, and consists of a vertical portion 70 and a flat portion 74 integrally formed at the lower end of the vertical portion 70, and has a cross-sectional shape that is generally inverted T-shaped. The vertical portion 70 has a thickness smaller than the groove width of the guide rail 4 and has a visible width dimension (length dimension) in which both ends in the length direction are located within the groove of the guide rail 4. The flat portion 74 has a predetermined depth width extending in the indoor-outdoor direction, and both ends in the visible width direction are located outside the guide rail 4. The vertical portion 70 of the seat plate 7 is located on the shutter core, and the flat portion 74 is divided into an outdoor side portion and an indoor side portion with the shutter core in between, and in the illustrated embodiment, the depth dimension of the outdoor side portion is smaller than the depth dimension of the indoor side portion. Alternatively, the vertical portion 70 may rise from the central part of the depth width of the flat portion 74.

[0045] On the indoor side of the vertical section 70, a latch bar housing section 700 is formed along the length direction (opening width direction) of the base plate 7, and the housing section 700 houses left and right latch bars 110 and 111, each having a locking portion 11A at its tip. An operating section 112 is provided on the side of the housing section 700 that is closer to one of the guide rails 4. On the outdoor side of the vertical section 70, stoppers 701 are provided on the left and right sides in the width direction, each having a horizontal contact surface (upper surface), and when the opening is fully open, the contact surface of the stopper 701 contacts the lower surface (lower plate 62) of the shutter case 6 (Figure 3).

[0046] The flat section 74 has a hollow section extending in the visible width direction (length direction) of the seat plate 7, and a long reinforcing member 75 extending in the visible width direction of the flat section 74 is provided in the hollow section. The reinforcing member 75 has a U-shape in cross-section, consisting of an upper surface section 750 and an outdoor hanging piece 751 and an indoor hanging piece 752 that hang integrally from the outdoor and indoor ends of the upper surface section 750. The cross-sectional shape of the reinforcing member 75 is not limited, and may be, for example, a long plate of a predetermined thickness.

[0047] The seat plate 7, including the flat portion 74, is made of aluminum, and the reinforcing material 75 is made of a metal with a higher melting point than aluminum (for example, steel). By providing the reinforcing material 75 on the flat portion 74 of the seat plate 7, even if the seat plate 7 attempts to deform due to the heat of a fire, the reinforcing material 75 suppresses thermal deformation (warping), thereby preventing as much as possible the formation of a gap between the seat plate and the floor surface FL that would be disadvantageous from a fire prevention standpoint.

[0048] In the illustrated embodiment, the height dimension of the flat portion 74 according to the third embodiment is greater than the height dimension of the flat portion 72 according to the second embodiment, and the depth dimension is smaller than the depth dimension of the flat portion 72.

[0049] The flat section 74 comprises a horizontal upper surface 740, thick outdoor hanging pieces 741 and indoor hanging pieces 742 that hang integrally from the outdoor and indoor ends of the upper surface 740, respectively, and a lower surface 743 that horizontally connects the lower part of the outdoor hanging piece 741 and the lower part of the indoor hanging piece 742. A hollow section is formed from the upper surface 740, the outdoor hanging piece 741, the indoor hanging piece 742, and the lower surface 743, and a reinforcing member 75 is provided in the hollow section. By housing the reinforcing member 75 in the hollow section, it can be installed on the seat plate 7 without fixing the reinforcing member 75. Note that the way the hollow section is formed is not limited to the illustrated configuration.

[0050] The lower portion 743 is located slightly above the lower ends of the outdoor hanging piece 741 and the indoor hanging piece 742, and three pocket portions are formed on the underside of the lower portion 743 in the depth direction. A cushioning member mounting portion (pocket portion) 744 is provided, located midway along the depth dimension (front-to-back direction) of the lower portion 743 of the flat portion 74, and the upper end portion of a fin-shaped cushioning member 745 extending in the opening width direction is attached to the mounting portion 744. In the illustrated embodiment, the cushioning member 745 is smaller in dimensions than the cushioning member 714, but the shape and dimensions of the cushioning member 745 are not limited and may be as long as the cushioning member 714.

[0051] In the lower portion 743, an outdoor pocket portion is formed on the outdoor side of the mounting portion 744, and an indoor pocket portion is formed on the indoor side. An outdoor thermal expansion fire-resistant member 746 is provided in the outdoor pocket portion, and an indoor thermal expansion fire-resistant member 747 is provided in the indoor pocket portion. A cover member 748 is attached to the longitudinal end of the flat portion 74 of the seat plate 7, closing the end in the visible width direction of the hollow portion.

[0052] A buffer member 745 is provided on the lower surface 743 of the hollow portion of the flat portion 74 of the seat plate 7, positioned in the middle of the depth direction and extending in the visible width direction (length direction of the seat plate 7). The outdoor side thermal expansion fire-resistant member 746 is located on the outdoor side of the buffer member 745, and the indoor side thermal expansion fire-resistant member 747 is located on the indoor side of the buffer member 745, and is provided so as to sandwich the buffer member 745 from the front and rear directions. The outdoor side thermal expansion fire-resistant member 746 is located on the outdoor side relative to the shutter core, and the indoor side thermal expansion fire-resistant member 747 is located on the indoor side relative to the shutter core.

[0053] By providing thermally expanding fire-resistant members 746 and 747 adjacent to the cushioning member 745 on the lower surface 743 of the seat plate 7, even if the seat plate 7 undergoes thermal deformation (warping) (note that in this embodiment, warping is suppressed by the reinforcing member 75), the thermally expanding fire-resistant members 746 and 747 will expand, sealing the gap between the lower surface 743 of the seat plate 7 and the floor surface FL, thereby preventing, as much as possible, the formation of a gap between the seat plate 7 and the floor surface FL that is unfavorable from a fire prevention standpoint.

[0054] Furthermore, in the event of a fire, the heat-expandable fire-resistant members 746 and 747 expand to sandwich the buffer member 745 from both the inside and outside, sealing the gap between the lower surface 743 of the seat plate 7 and the floor surface FL, thereby preventing as much as possible the formation of a gap that is unfavorable from a fire-prevention standpoint between them and the floor surface FL. Even if the buffer member 745 melts due to the heat of the fire, it is prevented as much as possible from igniting the melted buffer member 745. Note that the arrangement of the heat-expandable fire-resistant members is not limited; for example, even if only one of the heat-expandable fire-resistant members 746 and 747, which are laid flat in the width direction, is provided, it will still have the effect of sealing gaps in the event of a fire.

[0055] [D] Case support structure [D-1] Shutter Case The shutter case 6 comprises a top plate 60, a front plate 61, a bottom plate 62, and left and right side plates (not shown), and is formed into a box shape by being supported and connected to a frame fixed to the building structure (exterior wall W). The components of the shutter case 6 according to this embodiment are made of steel (steel, stainless steel, etc.). As shown in Figure 3, a winding shaft 2 is provided inside the shutter case 6, and when the window shutter is fully open, the shutter curtain 5 is wound around the winding shaft 2 and housed inside the shutter case 6. An opening is formed on the building structure side of the bottom plate 62 through which the shutter curtain 5 moves up and down, and when the window shutter is fully open, the bottom plate 7 at the lower end of the shutter curtain 5 is positioned in this opening.

[0056] [D-2] Framework The framework of the shutter case 6 consists of left and right brackets 1 and a plurality of case angles connected so as to span between the left and right brackets 1. Each bracket 1 consists of a roughly trapezoidal surface 10 having a shape and dimensions corresponding to the cross-sectional shape and dimensions of the shutter case 6, and a rear piece 100, an upper piece 101, a front piece 102, and a lower piece 103 formed by bending and rising relative to the surface 10 at its periphery.

[0057] As shown in Figure 3, the multiple case angles according to this embodiment include, in a cross-sectional view, a first case angle 63 extending horizontally in the longitudinal direction of the winding shaft 2 on the upper, indoor side (side closer to the exterior wall W) of the shutter case 6, a second case angle 64 extending horizontally in the longitudinal direction of the winding shaft 2 on the upper, outdoor side (side further from the exterior wall W) of the shutter case 6, a third case angle 65 extending horizontally in the longitudinal direction of the winding shaft 2 on the lower, indoor side (side closer to the exterior wall W) of the shutter case 6, and a fourth case angle 66 extending horizontally in the longitudinal direction of the winding shaft 2 on the lower, outdoor side (side further from the exterior wall W) of the shutter case 6.

[0058] The longitudinal end of the first case angle 63 is connected to the upper end of the rear piece 100 of the left and right brackets 1, the longitudinal end of the second case angle 64 is connected to the upper end of the front piece 102 of the left and right brackets 1, the longitudinal end of the third case angle 65 is connected to the indoor side of the lower piece 103, and the longitudinal end of the fourth case angle 66 is connected to the lower end of the front piece 102.

[0059] The framework, assembled from the left and right brackets 1 and the first case angle 63, second case angle 64, third case angle 65, and fourth case angle 66, is connected via the first case angle 63 to a plurality of hook fittings fixed to predetermined parts of the exterior wall W of the building structure at intervals in the width direction.

[0060] [D-3] Case Angle 1 The first case angle 63 is a long member extending in the visible width direction of the shutter case 6, and is formed from a vertically extending back portion 630, an upper piece 631 extending from the upper end of the back portion 630 toward the outside (away from the exterior wall W), a hanging piece 632 hanging downward from the tip of the upper piece 631, and a lower piece 633 extending from the lower end of the back portion 630 toward the outside (away from the exterior wall W). The first case angle 63 is a so-called C-shaped case angle.

[0061] The upper piece 631 of the first case angle 63 is designed to support the tip portion 600 (the portion closest to the outer wall W) of the top plate 60 of the shutter case 6. A notch 634 (see Figure 16) is formed at the base end portion (the corner with the back portion 630) of the upper piece 631 of the first case angle 63, corresponding to a hook fitting, and serves as the upper hooking portion of the first case angle 63.

[0062] As shown in Figures 13 and 18, the multiple hook fittings according to this embodiment consist of left and right end hook fittings 12 and an intermediate hook fitting 13. Both ends of the first case angle 63 in the longitudinal direction are hooked onto the left and right end hook fittings 12, and the central portion in the longitudinal direction is hooked onto the intermediate hook fitting 13.

[0063] As shown in Figure 16, a support member 14 is fixed to the longitudinal center portion of the rear portion 630 of the first case angle 63, and the first case angle 63 and the support member 14 are integrated. The support member 14 has a lower portion located below the lower piece 633 of the first case angle 63, and the lower portion of the support member 14 is engaged with the lower locking portion of the intermediate hook fitting 13.

[0064] [D-4] End hook fitting The end hook fitting 12 comprises a surface portion 120 fixed to the building structure (exterior wall W), a hooking piece 121 integrally formed in a folded manner at the upper end of the surface portion 120, and an upwardly inclined piece 122 folded at the lower part of the surface portion 120. The upper side of the first case angle 63 is hooked onto the hooking piece 121, the rear piece 100 of the bracket 1 is brought into contact with or close to the surface portion 120, and the upwardly inclined piece 1000 at the lower end of the rear piece 100 is brought into contact with the inclined piece 122 and fixed with screws. Such end hook fittings 12 are known, and for the configuration of the end hook fitting, refer to Japanese Patent Application Publication No. 2017-31597.

[0065] Since the tip portion 600 (the portion closest to the outer wall W) of the top plate 60 of the shutter case 6 rests on the upper piece 631 of the first case angle 63, the load of the shutter case 6 acts on it. If the central portion in the longitudinal direction of the first case angle 63 is displaced away from the building structure, it may cause the shutter case 6 to tip over. In this embodiment, the holding force of the shutter case 6 is improved by supporting the first case angle 63, on which the load of the shutter case 6 acts, with hook fittings at both ends in the longitudinal direction and in the central portion.

[0066] [D-5] Support structure for the first case angle using intermediate hook fittings The intermediate hook fitting 13 comprises a surface portion 130 fixed to the building structure (exterior wall W), a hooking piece 131 integrally formed in a folded manner at the upper end of the surface portion 130, and a locking portion formed on the surface portion 130 located below the hooking piece 131. The upper side of the first case angle 63 is hooked onto the hooking piece 131, and the lower side is locked to the locking portion. As described above, a support member 14 is fixed to the longitudinal central portion of the back portion 630 of the first case angle 63. The support member 14 has a lower portion located below the lower piece 633 of the first case angle 63, and the lower portion of the support member 14 is locked to the lower locking portion of the intermediate hook fitting 13 (see Figure 16).

[0067] [D-5-1] First Embodiment As shown in Figure 14, the intermediate hook fitting 13 according to the first embodiment comprises a vertically rectangular surface portion 130, a hooking piece 131 integrally formed in a folded manner at the upper end of the surface portion 130, an opening 132 formed in the surface portion 130 located below the hooking piece 131, and a protruding piece 133 located below the opening 132 and extending upward from the surface portion 130. The protruding piece 133, which is formed to protrude upward from the surface portion 130 of the intermediate hook fitting 13, serves as the lower locking portion.

[0068] As shown in the upper part of Figure 15, the support member 14 according to the first embodiment is formed from a horizontally rectangular surface portion 140, an inclined piece 141 that slopes downward and away from the building structure (exterior wall W) at the lower end of the surface portion 140, a lower piece 142 that extends toward the building structure (exterior wall W) from the lower end of the inclined piece 141, and a bent piece 143 that extends downward from the tip of the lower piece 142.

[0069] As shown in the upper part of Figure 16, the front surface 140 of the support member 14 is fixed in contact with and overlapping the longitudinal central portion of the back surface 630 of the first case angle 63 (in the illustrated embodiment, it is fixed with rivets, but other means, such as welding, may also be used). The lower portion of the support member 14 (inclined piece 141, lower piece 142, bent piece 143) is located below the lower piece 633 of the first case angle 63.

[0070] As shown in Figure 12, in the first embodiment, the lower end of the bent piece 143 at the tip of the lower piece 142 of the support member 14 is located within the opening 132 formed in the surface portion 130 of the intermediate hook fitting 13, and the base end portion of the lower piece 142 (the side furthest from the building structure, the side closer to the inclined piece 141) is supported by the upper end of the protruding piece 133 of the intermediate hook fitting 13, thereby supporting the load of the shutter case 6 acting on the first case angle 63. Furthermore, the downward surface of the bent piece 143 of the support member 14 comes into contact with the outer wall W, resulting in a more stable support state.

[0071] The first case angle 63 is hooked onto the hooked piece 131 at the upper notch 634, and the upper end of the protruding piece 133 is locked or in contact with the base end of the lower piece 142 of the support member 14, which is integrated with the first case angle 63, from below. Even if the upper hooked piece 131 deforms to open (for example, due to thermal deformation caused by heat during a fire), causing the first case angle 63 and the support member 14 to displace in a direction away from the building structure, the locked state between the lower piece 142 and the protruding piece 133 is maintained, and the lower locking state is not released. Furthermore, if the lower part of the first case angle 63 (the lower part of the support member 14) separates from the building structure, the bent piece 143 of the lower part of the support member 14 is designed to catch on the protruding piece 133.

[0072] [D-5-2] Second Embodiment As shown in Figure 19, the intermediate hook fitting 13 according to the second embodiment comprises a vertically rectangular surface portion 130, a hooking piece 131 integrally formed in a folded manner at the upper end of the surface portion 130, and an opening 132 formed in the surface portion 130 located below the hooking piece 131. The lower hooking portion consists of the lower edge of the opening 132 formed in the surface portion 130 of the intermediate hook fitting 13.

[0073] As shown in the lower part of Figure 15, the support member 14 according to the second embodiment consists of a horizontally rectangular surface portion 140, an inclined piece 141 at the lower end of the surface portion 140 that slopes downward so as to move away from the building structure, and a lower piece 142 extending toward the building structure from the lower end of the inclined piece 141.

[0074] As shown in the lower part of Figure 16, the front surface 140 of the support member 14 is fixed in contact with and overlapping the longitudinal central portion of the back surface 630 of the first case angle 63 (in the illustrated embodiment, it is fixed with rivets, but other means, such as welding, may also be used). The lower portion of the support member 14 (inclined piece 141, lower piece 142) is located below the lower piece 633 of the first case angle 63.

[0075] As shown in Figure 17, in the second embodiment, the tip portion of the lower piece 142 of the support member 14 (the side closer to the building structure, the side further from the inclined piece 141) is locked and supported by the lower edge of the opening 132 formed in the surface portion 130 of the intermediate hook fitting 13, thereby supporting the load of the shutter case 6 acting on the first case angle 63.

[0076] The first case angle 63 is hooked onto the retaining piece 131 at the upper notch 634, and the tip of the lower piece 142 of the support member 14, which is integrated with the first case angle 63, is locked or in contact with the lower edge of the opening 132 from above.

[0077] [E] Side frame of window shutter The side frame of the window shutter according to this embodiment consists of a guide rail base frame 3 that cantilevers out from the exterior wall W, and a guide rail 4 connected to the tip of the guide rail base frame 3. Although the guide rail base frame 3 and guide rail 4 according to this embodiment are formed from aluminum profiles, the material of the guide rail base frame 3 and guide rail 4 is not limited. The configuration of the guide rail base frame 3 and guide rail 4 according to this embodiment will be described in detail below.

[0078] [E-1] Guide rail base frame The guide rail base frame 3 is a long member that extends perpendicularly in the height direction of the opening, and as shown in Figure 21, it consists of a base end facing surface 30 fixed to the outer wall W, an outer facing edge 31 extending in the depth direction away from the outer wall W from the outside of the base end facing surface 30, an inner facing edge 32 extending in the depth direction away from the outer wall W from the inside of the base end facing surface 30, an intermediate facing edge 33 extending in the direction away from the outer facing edge 31 from the tip of the inner facing edge 32, and a tip facing piece 34 extending in the depth direction away from the outer wall W from the tip of the intermediate facing edge 33. The outer facing edge 31 forms the facing surface of the side frame, and a locking piece 310 is integrally formed at the tip of the outer facing edge 31. The tip facing piece 34 is a connecting piece to the guide rail 4.

[0079] A reinforcing member 15, which has a U-shape in cross-section, is fixed inside the lower part of the guide rail base frame 3. The reinforcing member 15 has a visible edge 150, an outer depth edge 151 extending in the depth direction, and an inner depth edge 152. The visible edge 150 is in contact with the inner surface of the base end visible surface 30 of the guide rail base frame 3, the outer depth edge 151 is in contact with or close to the inner surface of the outer depth edge 31 of the guide rail base frame 3, and the inner depth edge 152 is in contact with the inner surface of the inner depth edge 32 of the guide rail base frame 3, and the reinforcing member 15 is fixed with screws.

[0080] [E-2] Guide rail The guide rail 4 is a long member that extends vertically in the height direction of the opening. As shown in Figure 21, it has a roughly U-shape in plan view, with a side edge 40 on the side furthest from the outer wall W (outdoor side facing edge), a side edge 41 on the side closer to the outer wall W (outdoor side facing edge), and a base edge 42. Guide grooves are formed between the opposing side edges 40 and 41 to receive both ends of the shutter curtain 5 in the width direction and guide it in the vertical direction.

[0081] An extension edge 400 is integrally formed on the base end side of the side edge 40, extending beyond the bottom edge 42 in a direction away from the opening, and the visible surface of the side frame is formed from the side edge 40 and the extension edge 400. The end of the extension edge 400 is bent inward to form an engaging piece 401 integrally. An extension piece 410 is integrally formed on the side edge 41, extending toward the interior, and the extension piece 410 serves as a connecting piece to the guide rail base frame 3.

[0082] [E-3] Side frame The side frame is formed from the guide rail base frame 3 and the guide rail 4. The guide rail base frame 3 is installed in a cantilevered manner relative to the exterior wall W by fixing it to the structure (exterior wall W) with multiple screws 300 along the height direction, with the base end facing surface 30 abutting against the exterior wall W. The height dimension of the reinforcing member 15 is greater than the height dimension of the rising portion of the waterproof layer 20 (the height position L of the upper end is shown in Figure 20), and it has an upper portion located above the rising portion. The facing edge 150 of the upper portion abuts against the base end facing surface 30, and the base end facing surface 30 and the facing edge 150 are fixed together to the structure (exterior wall W) using screws 301. The engaging piece 401 of the guide rail 4 is locked to the locking piece 310 on the outer edge 31 of the guide rail base frame 3, and the extended piece 410 (connecting piece) of the guide rail 4 is brought into contact with the tip edge piece 34 (connecting piece) of the guide rail base frame 3 and fixed together with a screw 340 to form a single unit.

[0083] The side frame, consisting of a guide rail base frame 3 and a guide rail 4, is well known to those skilled in the art, and the shape and connection configuration of the guide rail base frame 3 and the guide rail 4 are not limited to the illustrated configuration. The upper portions of the left and right side frames abut against the lower portions of the shutter case 6 (building frame side bottom plate 67). No drip plates (bottom frames) are provided on the lower portions of the left and right side frames. The lower ends of the side frames abut (including partial abutment) or are close to (including partial proximity) the floor surface FL.

[0084] In the window shutter according to this embodiment, a bottom sealing member 16 is provided at the lower part of the side frame. As shown in Figure 24, the bottom sealing member 16 has a bottom surface portion 160, which has substantially the same shape and dimensions as the cross-sectional shape and dimensions of the side frame and is designed to cover the lower end of the side frame. Two rising pieces 161 and 162 are formed on the bottom surface portion 160. The rising piece 161 is fixed to the lower end of the visible surface (outer visible edge 31) of the side frame from the outside with a rivet (or screw), and the rising piece 162 is fixed to the lower end of the visible edge (intermediate visible edge 33) of the side frame from the outside with a rivet (or screw). The bottom sealing member 16 according to this embodiment is made of steel (or stainless steel, etc.).

[0085] [F] Gap sealing method for the lower part of the side frame of a window shutter In this embodiment, the lower wall surface W' is located on the indoor side of the exterior wall W to which the guide rail base frame 3 and shutter case 6 are attached. The lower portion of the side frame in this embodiment is located below the window device 8, and this lower portion is spaced apart from the lower wall surface W' on the outdoor side, creating a gap between the lower portions of the left and right side frames and the lower wall surface W'. More specifically, an intermediate lower surface W'' of the building structure is formed from the upper end of the lower wall surface W' to the outer wall W, and a vertical rectangular gap in side view is formed in the lower parts of the left and right side frames, formed from the base end facing surface of the side frame (base end facing surface 30 of the guide rail base frame 3), the lower wall surface W', the floor surface FL, and the intermediate lower surface W'' of the building structure. The outdoor side of the gap is defined by the base end facing surface 30, the indoor side of the gap is defined by the lower wall surface W', the lower side of the gap is defined by the floor surface FL, and the upper side of the gap is defined by the intermediate lower surface W'' of the building structure (see Figure 20). The formation of such a gap can lead to problems such as light leakage and a decrease in aesthetic appeal due to the gap being visible from the outside. Therefore, it is desirable to close this gap with a gap-closing means. In this embodiment, three types of gap-closing means are disclosed: the first embodiment, the second embodiment, and the third embodiment.

[0086] [F-1] First Embodiment A first embodiment of the gap-filling means will be described with reference to Figures 22 to 26. The gap-filling means according to the first embodiment consists of a first member 17 fixed to the lower part of the base end facing surface 30 of the guide rail base frame 3, and a second member 18 whose height position is adjustable relative to the first member 17. Because the height dimension of the gap-filling means according to the first embodiment is variable, it can effectively address situations where the height dimension of the gap differs depending on the site, or where the height dimensions of the left and right gaps differ due to the inclination of the floor surface FL in the opening width direction.

[0087] As shown in the right diagram of Figure 25, the first member 17 is a long member extending in the height direction and consists of a visible edge 170, a first depth edge 171 extending from one end of the visible edge 170, an intermediate visible edge 172 extending in the visible direction from the tip of the first depth edge 171 so as to face the visible edge 170, and a second depth edge 173 extending in the depth direction from the tip of the intermediate visible edge 172 in a direction away from the visible edge 170, and is provided with an upper edge 174 and a lower edge 175. Two holes 1700 are formed in the visible edge 170, spaced apart in the height direction, and are provided for inserting the bolt of the fixing means 176 (bolt and nut).

[0088] The visible width of the visible edge 170 of the first member 17 is approximately the same as the visible width of the visible surface 30 on the base end side of the guide rail base frame 3, and the visible width of the intermediate visible edge 172 is shorter than the visible width of the visible edge 170. The first visible edge 171, the intermediate visible edge 172, and the second visible edge 173 form the visible portion of the first member 17 (the first visible portion of the gap-filling means), and the sum of the visible dimensions of the first visible edge 171 and the second visible edge 173 is the visible dimension of the first member 17.

[0089] As shown in the left diagram of Figure 25, the second member 18 is a long member that extends in the height direction and extends in the depth direction as a whole, and consists of a first depth edge 180, an intermediate facing edge 181 that extends in the depth direction from the end of the first depth edge 180, and a second depth edge 182 that extends in the depth direction from the end of the intermediate facing edge 181 on the opposite side from the first depth edge 180 (the entire second member 18 is the second depth portion of the gap-filling means), and is provided with an upper edge 183 and a lower edge 184. Two holes 1800 are formed in the first depth edge 180 with a gap in the height direction, and a screw 185 is inserted through them. The depth dimension of the second member 18 is the sum of the depth dimension of the first depth edge 180 and the depth dimension of the second depth edge 182.

[0090] In this embodiment, the height dimensions of the first member 17 and the second member 18 are substantially the same, the depth portion of the first member 17 (first depth edge 171, intermediate depth edge 172, and second depth edge 173) and the second member 18 have substantially the same cross-sectional shape and dimensions, and the depth dimensions of the first member 17 and the second member 18 are substantially the same. The height dimensions of the first member 17 and the second member 18 are lower than the height dimension of the assumed gap, and the depth dimensions of the first member 17 and the second member 18 are smaller than the depth width of the assumed gap.

[0091] The first visible edge 171 of the first member 17 and the first visible edge 180 of the second member 18, the intermediate visible edge 172 of the first member 17 and the intermediate visible edge 181 of the second member 18, and the second visible edge 173 of the first member 17 and the second visible edge 182 of the second member 18 are all approximately the same width, and a gap-filling means is formed when the second member 18 overlaps the outer surface of the visible portion of the first member 17, and the second member 18 is slidable in the height direction relative to the first member 17.

[0092] The right-hand diagram of Figure 26 shows a first configuration in which the projection of the first member 17 and the second member 18 overlap over their entire height, with the upper edge 174 of the first member 17 and the upper edge 183 of the second member 18 coinciding, and the lower edge 175 of the first member 17 and the lower edge 184 of the second member 18 coinciding.

[0093] The left diagram of Figure 26 shows a second configuration in which the second member 18 slides upward relative to the projection of the first member 17, as shown in the right diagram, with the projection of the first member 17 and the second member 18 partially overlapping in the height direction. The upper edge 183 of the second member 18 is higher than the upper edge 174 of the first member 178, and the lower edge 175 of the first member 17 is lower than the lower edge 184 of the second member 18.

[0094] In the right diagram of Figure 26, the gap-sealing means is in the first embodiment and has a first height dimension, and in the left diagram of Figure 26, the gap-sealing means is in the second embodiment and has a second height dimension that is higher than the first height dimension, and the depth of the gap-sealing means is the same in the first and second embodiments. In Figure 22, the gap-sealing means is in the first embodiment, and in Figure 23, the gap-sealing means is in the second embodiment.

[0095] As shown in Figure 24, the first member 17 is fixed by fixing means 176 (bolts and nuts) with its visible edge 170 in contact with the outer surface of the base end visible surface 30 of the guide rail base frame 3. In the illustrated configuration, the visible edge 150 of the reinforcing member 15 is in contact with the inner surface of the base end visible surface 30, and the visible edge 150, the base end visible surface 30, and the visible edge 170 are fixed together by the fixing means 176. The first visible edge 171 of the first member 17 is approximately flush with the outer visible edge 31 of the guide rail base frame 3 (located inward by the thickness of the first visible edge 180 of the second member 18) and extends toward the lower wall surface W', while the tip of the second visible edge 173 is spaced apart from the lower wall surface W'. The second member 18 is superimposed on the projection of the first member 17, which is fixed to the base end facing surface 30 of the guide rail base frame 3. The first projection edge 180 of the second member 18 is flush with the outer projection edge 31 of the guide rail base frame 3, and the tip of the second projection edge 182 of the second member 18 coincides with the tip of the second projection edge 173 and is spaced apart from the lower wall surface W'. Alternatively, the first projection edge 180 of the second member 18 may extend along the outer projection edge 31 of the guide rail base frame 3 instead of being flush with it.

[0096] Figure 22 shows the state in which the second member 18 is superimposed over the entire height of the recess of the first member 17 fixed to the base end surface 30 of the guide rail base frame 3 (corresponding to the first embodiment in the right diagram of Figure 26), and a gap is formed between the upper edges 174 and 183 of the first member 17 and the second member 18 and the upper end of the gap (the lower surface W'' of the middle of the structure).

[0097] Figure 23 shows the state in which the second member 18 has been slid upward relative to the projection of the first member 17 from the state in Figure 22 (corresponding to the second embodiment in the left diagram of Figure 26), and the upper edge 183 of the second member 18 is close to or in contact with the upper end of the gap (intermediate lower surface W'' of the building structure). With the height position of the second member 18 determined, the first projection edge 180 of the second member 18 is fixed to the first projection edge 171 of the first member 17 with a screw 185. After adjusting the height dimension of the gap-sealing means according to the first embodiment, the gap-sealing means (ends of the second projection edges 173 and 182) and the lower wall surface W'' are further sealed in the height direction with an airtight member 19. Alternatively, a sealing material may be provided to seal the gap between the upper end of the gap-sealing means and the intermediate lower surface W'' of the building structure, and between the lower end of the gap-sealing means and the floor surface FL.

[0098] [F-2] Second Embodiment A second embodiment of the gap-filling means will be described with reference to Figures 27 to 32. The gap-filling means according to the second embodiment consists of a first member 27 fixed to the lower part of the base end side facing surface 30 of the guide rail base frame 3, and a second member 28 whose position in the depth direction is adjustable relative to the first member 27. Since the depth dimension of the gap-filling means according to the second embodiment is variable, it can be particularly effective in cases where the depth dimension of the gap differs depending on the site.

[0099] As shown in the left diagram of Figure 31, the first member 27 is a long member extending in the height direction, and has a U-shape in cross-section, with a visible edge 270 and left and right recessed edges 271 and 272. On the visible edge 270 of the first member 27, a first hole 2700, a second hole 2701, and a third hole 2702 are formed on the upper side at intervals in the height direction, and a third hole 2702, a second hole 2701, and a first hole 2700 are formed on the lower side at intervals in the height direction. The recessed edges 271 and 272 of the first member 27 serve as the first recessed portion of the gap-filling means.

[0100] As shown in the right-hand figure of Figure 31, the second member 28 is a long member extending in the height direction, and has a cross-sectional shape of H-shape with a visible edge 280 and left and right recessed edges 281 and 282. Screw holes 2800 are formed in the visible edge 280 of the second member 28 with vertical spacing between them. The recessed edges 281 and 282 of the second member 28 serve as the second recessed portion of the gap-filling means.

[0101] The first member 27 and the second member 28 have the same height dimension, which is approximately the same as the height dimension of the gap. The dimension between the outer surfaces of the depth edges 281 and 282 of the second member 28 is approximately the same as (slightly smaller than) the dimension between the inner surfaces of the depth edges 271 and 272 of the first member 27. The first member 27 and the second member 28 constitute the gap-closing means according to the second embodiment, with the outer surfaces of the depth edges 281 and 282 of the second member 28 overlapping the inner surfaces of the depth edges 271 and 272 of the first member 27 in a slidable manner in the depth direction. The depth dimension of the gap-closing means is variable as the second member 28 slides relative to the first member 27 in the depth direction.

[0102] In the gap-sealing means according to the second embodiment, which is formed by combining a first member 27 and a second member 28, the left diagram of Figure 32 shows the first embodiment, in which the depth dimension is smallest (the distance between the visible edge 270 of the first member 27 and the visible edge 280 of the second member 28 is shortest). In this embodiment, as the visible edge 280 of the second member 28 moves away from the visible edge 270 of the first member 27, the depth dimension of the gap-sealing means increases, resulting in the second embodiment shown in the right diagram of Figure 32. In Figures 27 and 28, the gap-sealing means is in the first embodiment, and in Figures 29 and 30, the gap-sealing means is in the second embodiment.

[0103] The gap-filling means according to the second embodiment includes three types of screws extending in the depth direction. The first screw 21 is a screw that fixes the first member 27 to the side frame (the base end side visible surface 30 of the guide rail base frame 3), the second screw 22 is a screw that adjusts the position of the second member 28 in the depth direction relative to the first member 27, and the third screw 23 is a screw that fixes the first member 27 (base end side visible surface 30) and the second member 28 which has been adjusted in position.

[0104] On the base end facing surface 30 of the guide rail base frame 3 (and, in the illustrated embodiment, the facing edge 150 of the reinforcing member 15), the first, second, and third holes are formed, corresponding to the first hole 2700, second hole 2701, and third hole 2702 formed on the upper side of the facing edge 270 of the first member 27, and the third hole 2702, second hole 2701, and first hole 2700 formed on the lower side, respectively.

[0105] The first member 27 is fixed with a first screw 21 with its visible edge 270 in contact with the base end visible surface 30 of the guide rail base frame 3, and the first screw 21 is screwed into the first hole 2700 of the visible edge 270. The first hole 2700 is a screw hole, and the first hole in the base end visible surface 30 (and the visible edge 150 of the reinforcing member 15) corresponding to the first hole 2700 is a through hole. The first screw 21 integrates the base end visible surface 30 of the guide rail base frame 3, the visible edge 150 that is in contact with the inner surface of the base end visible surface 30, and the visible edge 270 that is in contact with the outer surface of the base end visible surface 30 (see Figure 28). One of the visible edges 271 of the first member 27 is flush with the outer visible edge 31 of the guide rail base frame 3. Note that while Figure 28 shows the guide rail 4 attached to the guide rail base frame 3, in the actual installation procedure, the guide rail 4 is attached after the gap-filling means is installed.

[0106] The second hole 2701 formed in the visible edge 270 of the first member 27 is a screw hole, and the second hole in the base end visible surface 30 (and the visible edge 150 of the reinforcing member 15) corresponding to the second hole 2701 is a through hole. The second screw 22 is inserted through the second hole in the base end visible surface 30 and screwed into the second hole 2701, and the tip of the shaft portion of the second screw 22 abuts against the visible edge of the second member 28. In the state of the first embodiment shown in Figure 32, the gap-filling means tightens the second screw 22 so that the shaft portion of the second screw 22 pushes against the visible edge of the second member 28, causing the second member 28 to slide in the depth direction relative to the first member 27 fixed to the base end visible surface 30, thereby increasing the depth dimension (upper part of Figure 30).

[0107] The third hole 2702 formed in the visible edge 270 of the first member 27 is a through hole, and the third hole in the base end visible surface 30 (and the visible edge 150 of the reinforcing member 15) corresponding to the third hole 2702 is also a through hole. The third hole 2702 of the first member 27 and the screw hole 2800 of the second member 28 coincide, and by inserting the third screw 23 through the third hole in the base end visible surface 30 (and the visible edge 150 of the reinforcing member 15) and the third hole 2702 formed in the visible edge 270, the tip portion of the shaft is screwed into the screw hole 2800 of the second member 28, thereby fixing the position of the second member 28 relative to the first member 27 (in the illustrated embodiment, the head of the third screw 23 is in contact with the visible edge 150), and determining the depth of the gap-filling means (Figure 30, lower diagram). The third screw 23 is an optional element, and the position of the gap-sealing means is maintained even without the third screw 23.

[0108] A sealant 29 is fitted into the U-shaped space in cross-section, enclosed by the half of the second member 28's facing edges 281 and 282 that is furthest from the first member 27, and the facing edge 280, extending over its entire height. When external pressure is applied, the sealant 29 partially protrudes beyond the ends of the facing edges 281 and 282 of the second member 28 (Figures 28 and 32). By pushing the second member 28 with the second screw 22, the sealant 29 is made to adhere tightly to the lower wall surface W' (Figure 30). Alternatively, a sealant may be provided to seal the gap between the upper end of the gap-sealing means and the lower intermediate surface W'' of the structure, and between the lower end of the gap-sealing means and the floor surface FL. In the illustrated embodiment, the depth dimensions of the front edges 271 and 272 of the first member 27 and the front edges 281 and 282 of the second member 28 are the same, but the front dimension of either the first member 27 or the second member 28 may be larger than the front dimension of the other. In the illustrated embodiment, the front edge 80 of the second member 8 is located in the center of the front width of the front edges 281 and 282, but it may be offset to either the outdoor side or the indoor side.

[0109] [F-3] Third Embodiment A third embodiment of the gap-sealing means will be described with reference to Figures 33 to 39. The gap-sealing means according to the third embodiment has variable height and depth dimensions, and can effectively address all cases where the height dimension of the gap differs from site to site, where the height dimensions of the left and right gaps differ due to the inclination of the floor surface FL in the opening width direction, and where the depth dimension of the gap differs from site to site.

[0110] The gap-sealing means according to the third embodiment comprises a first unit 37 and a second unit 38 whose position in the depth direction is adjustable relative to the first unit 37. The first unit 37 comprises a first element 43 and a second element 44 whose position in the height direction is adjustable relative to the first element 43. The second unit 38 comprises a third element 45 and a fourth element 46 whose position in the height direction is adjustable relative to the third element 45. The fourth element 46 of the second unit 38 moves upward in accordance with the upward movement of the second element 44 of the first unit 37. In this embodiment, the first element 43, the second element 44, the third element 45, and the fourth element 46 all have the same height dimension, which is lower than the height dimension of the gap.

[0111] As shown in Figure 38(B), the first element 43 is a long member extending in the height direction, and has a U-shape in cross-section, with a visible edge 430 and left and right visible edges 431 and 432, and also has an upper edge 433 and a lower edge 434. On the visible edge 430 of the first element 43, a first hole 4300, a second hole 4301, and a third hole 4302 are formed on the upper side at intervals in the height direction, and a third hole 4302, a second hole 2301, and a first hole 4300 are formed on the lower side at intervals in the height direction.

[0112] As shown in Figure 38(A), the second element 44 is a long member extending in the height direction, and has a U-shape in cross-section, with a visible edge 440 and left and right visible edges 441 and 442, and also has an upper edge 443 and a lower edge 444. Vertical elongated holes 4400 are formed at the top and bottom of the visible edge 440 of the second element 44.

[0113] The first element 43 and the second element 44 have the same height dimension. The dimension between the outer surfaces of the depth edges 431 and 432 of the first element 43 is approximately the same as (slightly smaller than) the dimension between the outer surfaces of the depth edges 441 and 442 of the second element 44. By overlapping the outer surface of the first element 43, which has a U-shaped cross-section, with the inner surface of the second element 44, a first unit 37 with a U-shaped cross-section is formed. The first hole 4300, second hole 4301, and third hole 4302 formed in the facing edge 430 of the first element 43 coincide with the elongated hole 4400 formed in the facing edge 440 of the second element 44. The second element 44 is slidable in the height direction relative to the first element 43 with the outer surfaces of the depth edges 441 and 442 of the second element 44 overlapping with the inner surfaces of the depth edges 431 and 432 of the first element 43. Figure 37(A) shows the state in which the second element 44 has slid upward relative to the first element 43.

[0114] As shown in Figure 38(D), the third element 45 is a long member extending in the height direction, and has a visible edge 450 and left and right visible edges 451 and 452, forming an H-shape in cross-section, and also has an upper edge 453 and a lower edge 454. Two screw holes 4500 are formed in the visible edge 450 of the third element 45, spaced apart in the height direction.

[0115] As shown in Figure 38(C), the fourth element 46 is a long member extending in the height direction, and has a U-shape in cross-section, with a visible edge 460 and left and right depth edges 461 and 462. Horizontal bent pieces 4610 and 4620 are formed at the upper ends of the depth edges 461 and 462. The upper and lower ends of the fourth element 46 are the upper edge 463 and the lower edge 464, respectively.

[0116] The third element 45 and the fourth element 46 have the same height dimension. The dimension between the outer surfaces of the depth edges 451 and 452 of the third element 45 is approximately the same as (slightly smaller than) the dimension between the outer surfaces of the depth edges 461 and 462 of the fourth element 46. The second unit 38 is formed by overlapping the H-shaped outer surface of the third element 45 with the U-shaped inner surface of the fourth element 46. The fourth element 46 is slidable in the height direction relative to the third element 45, with the inner surfaces of the depth edges 461 and 462 of the fourth element 46 overlapping the outer surfaces of the depth edges 451 and 452 of the third element 45. Figure 37(B) shows the state in which the fourth element 46 has slid upward relative to the third element 45.

[0117] When the first unit 37 and the second unit 38 are combined and the upper edges 433, 443, 453, 463 and lower edges 434, 444, 454, 464 of the first element 43, second element 44, third element 45, and fourth element 46 are aligned, the folded pieces 4610 and 4620 of the fourth element 46 of the second unit 38 are placed on the upper edge 433 of the first element 43 of the first unit 37 and the upper edge 443 of the second element 44 (Figure 39, left). In this state, when the second element 44 of the first unit 37 is lifted, the folded pieces 4610 and 4620 of the fourth element 46 of the second unit 38 are pushed up, causing the second element 44 and the fourth element 46 to move upward as a single unit (Figure 37(C)).

[0118] The gap-filling means according to the third embodiment includes three types of screws extending in the depth direction. The first screw 21 is a screw that fixes the first unit 37 (first element 43) to the side frame (the base end side visible surface 30 of the guide rail base frame 3), the second screw 22 is a screw that adjusts the position of the second unit 38 (third element 45) in the depth direction relative to the first unit 37, and the third screw 23 is a screw that fixes the first unit 37 (base end side visible surface 30) and the second unit 38 (third element 45) which has been adjusted in position.

[0119] On the base end facing surface 30 of the guide rail base frame 3 (and, in the illustrated embodiment, the facing edge 150 of the reinforcing member 15), the first, second, and third holes are formed, corresponding to the first hole 4300, second hole 4301, and third hole 4302 formed on the upper side of the facing edge 430 of the first element 43 of the first unit 37, and the third hole 4302, second hole 4301, and first hole 4300 formed on the lower side.

[0120] The first unit 37 is fixed to the base end surface 30 of the guide rail base frame 3 by fixing the visible edge 430 of the first element 43 to the base end surface 30 of the guide rail base frame 3 with the first screw 21, with the visible edge 440 of the second element 44 in contact with the base end surface 30 of the guide rail base frame 3. One of the visible surfaces of the first unit 37 (one visible edge 441 of the second element 44) is flush with the outer visible edge 31 of the guide rail base frame 3. The first hole 4300 is a screw hole, and the first hole in the base end surface 30 (and the visible edge 150 of the reinforcing member 15) corresponding to the first hole 4300 is a through hole, and the first hole 4300 coincides with the elongated hole 4400 in the visible edge 440 of the second element 44 of the first unit 37. The first screw 21 is inserted through the first hole in the base end facing surface 30 (and the facing edge 150 of the reinforcing member 15) and the elongated hole 4400 formed in the facing edge 440 of the second element 44, and is screwed into the first hole 4300 of the facing edge 430.

[0121] By tightening the first screw 21, the base end facing surface 30 of the guide rail base frame 3, the facing edge 150 that abuts the inner surface of the base end facing surface 30, and the facing edge (facing edge 440 + facing edge 430) of the first unit 37 that abuts the outer surface of the base end facing surface 30 are integrated (see Figure 34). Note that although Figure 34 shows the guide rail 4 attached to the guide rail base frame 3, in the actual installation procedure, the guide rail 4 is attached after the gap-filling means is installed.

[0122] Note that the first screw 21 is tightened after the height position of the second element 44 relative to the first element 43 is determined. With the first element 43 temporarily held in place by the first screw 21, the second element 44 is slid upward relative to the first element 43, and the second element 44 and the fourth element 46 are moved upward together to determine the height dimension of the gap-filling means. By tightening the first screw 21, the visible edge 440 of the second element 44 is sandwiched between the visible surface 30 on the base side of the guide rail base frame 3 and the visible edge 430 of the first element 43, thereby fixing the height position of the second element 44, and simultaneously fixing the height position of the fourth element 46.

[0123] The second hole 4301 formed in the visible edge 430 of the first element 43 of the first unit 37 is a screw hole, and the second hole in the base end visible surface 30 (and the visible edge 150 of the reinforcing member 15) corresponding to the second hole 4301 is a through hole, and the second hole 4301 coincides with the elongated hole 4400 in the visible edge 440 of the second element 44 of the first unit 37. The second screw 22 is inserted through the second hole in the base end visible surface 30, and the shaft portion of the second screw 22 is screwed into the elongated hole 4400 and the second hole 4301, with its tip in contact with the visible edge 450 of the third element 45 of the second unit 38.

[0124] In the gap-sealing means according to the third embodiment, when the depth dimension is small (Figures 33, 34, and left of Figure 39), tightening the second screw 22 causes the shaft of the second screw 22 to press against the visible edge 450 of the third element 45 of the second unit 38. This causes the second unit 38 (third element 45) to slide in the depth direction relative to the first unit 37 fixed to the base end visible surface 30, increasing the depth dimension and causing the visible edge 460 of the fourth element 46 of the second unit 38 to come into contact with the lower wall surface W' (upper of Figure 36). A sealant may be provided on the visible edge 460 of the fourth element 36.

[0125] The third hole 4302 formed in the visible edge 430 of the first element 43 of the first unit 37 is a through hole, and the third hole in the base end visible surface 30 (and the visible edge 150 of the reinforcing member 15) corresponding to the third hole 4302 is a through hole, and the third hole 4302 coincides with the elongated hole 4400 in the visible edge 440 of the second element 44 of the first unit 37. The third hole 4302 formed in the visible edge 430 of the first element 43 of the first unit 37 and the screw hole 4500 formed in the visible edge 45 of the third element 45 of the second unit 38 coincide. The third screw 23 is inserted through the third hole in the base end visible surface 30 (and the visible edge 150 of the reinforcing member 15), the elongated hole 4400 formed in the visible edge 440 of the second element 44 of the first unit 37, and the third hole 4302 formed in the visible edge 430 of the first element 43, and the shaft portion is screwed into the screw hole 4500 in the visible edge 450 of the third element 45 of the second unit 38, thereby fixing the position of the second unit 38 relative to the first unit 37, and the gap is sealed by the gap-sealing means (Figure 36, lower diagram). Furthermore, a sealing material may be provided to seal the gaps between the visible surface (visible edge 460) of the gap-sealing means and the lower wall surface W', between the upper end of the gap-sealing means and the intermediate lower surface W'' of the structure, and between the lower end of the gap-sealing means and the floor surface FL. The visible edges 431 and 432 of the first element 43 and the visible edges 441 and 442 of the second element 44 are designated as the first visible parts of the gap-sealing means, and the visible edges 451 and 452 of the third element 45 and the visible edges 461 and 462 of the fourth element 46 are designated as the second visible parts of the gap-sealing means. In the illustrated embodiment, the depth dimensions of the depth portion of the first unit 37 (depth edges 431, 432 of the first element 43) and the depth dimensions of the depth portion of the second unit 38 (depth edges 451, 452 of the third element 45) are the same, but the depth dimension of either the depth portion of the first unit 37 (depth edges 431, 432 of the first element 43) or the depth portion of the second unit 38 (depth edges 451, 452 of the third element 45) may be larger than the depth dimension of the other. In the illustrated embodiment, the depth edge 450 of the third element 45 is located in the center of the depth width of the depth edges 451, 452, but it may be offset to either the outdoor side or the indoor side. [Explanation of Symbols]

[0126] 1 Bracket 2. Winding shaft 3 Guide rail base frame (side frame) 30 Base end side visible surface 4 Guide rails (side frames) 5. Shutter Curtain 5A upper part 5B Lower part 5C Outermost part 50 slats 500 Main Unit 501 Upper interlock section 502 Lower interlock section 6. Shutter case (shutter storage compartment) 60 Top plate 63 Case Angle 1 630 Rear part 631 Top piece 633 Lower piece 7 Seat board 70 Vertical section 71 Flat section 72 Flat section 724 Bottom part 73 Reinforcement material 74 Flat section 743 Bottom part 745 Cushioning material 746 Outdoor side thermal expansion fire-resistant material 747 Indoor thermal expansion fire-resistant material 75 Reinforcement material 8 Window device 81 Bottom frame 9 Handle 90 Upper horizontal piece 91 Lower horizontal piece 92 Vertical surface section 93 Handle piece 11 Locking device 112 Operating part (lever lock) 113 Lever (Lever Lock) 114 String-like member 115 Grip part 12 End hook fittings 13 Intermediate hook fittings 130 area 131 Hooked piece 132 Aperture 133 Projecting piece 14 Support Member 140 area 141 Inclined piece 142 Lower piece 143 Bent piece 20 waterproof layer 17. First component (gap sealing means) 18. Second component (gap sealing means) 19. Airtight components (sealants) 27. First component (gap sealing means) 28. Second component (gap sealing means) 29. Airtight components (sealants) 37. Unit 1 (Gap-sealing means) 38. Second unit (gap sealing means) 43. First element 44. Second element 45. Third Element 46. ​​Fourth Element FL floor surface W External wall (framework) W' Lower wall W´´ Middle lower surface of the frame

Claims

1. A mounting structure for a case angle that supports a shutter case, The aforementioned hook fitting comprises a surface portion fixed to the building structure, a hooking piece integrally formed at the upper end of the surface portion, and a locking portion formed on the surface portion located below the hooking piece. The case angle comprises a rear portion that is spaced apart from the surface portion of the hook fitting, an upper piece at the upper end of the rear portion, and a lower piece at the lower end of the rear portion. A support member is fixed to the rear portion, and the support member has a lower portion located below the lower piece of the case angle. The lower portion of the support member comprises an inclined piece that slopes downward so as to move away from the building structure, and a lower piece that extends toward the building structure from the lower end of the inclined piece. The locking portion is the lower edge of the opening formed on the surface of the hook fitting, The upper part of the case angle is hooked onto the retaining piece, and the end of the lower piece of the support member on the building structure side is locked to the lower edge. Mounting structure for case angles.

2. A mounting structure for a case angle that supports a shutter case, The aforementioned hook fitting comprises a surface portion fixed to the building structure, a hooking piece integrally formed at the upper end of the surface portion, and a locking portion formed on the surface portion located below the hooking piece. The case angle comprises a rear portion that is spaced apart from the surface portion of the hook fitting, an upper piece at the upper end of the rear portion, and a lower piece at the lower end of the rear portion. A support member is fixed to the rear portion, and the support member has a lower portion located below the lower piece of the case angle. The lower portion of the support member comprises an inclined piece that slopes downward so as to move away from the building structure, and a lower piece that extends toward the building structure from the lower end of the inclined piece. The locking portion is a protruding piece formed in a rising shape on the surface portion, The upper side of the case angle is hooked onto the retaining piece, and the end of the lower piece of the support member furthest from the frame is supported by the upper end of the protruding piece. Mounting structure for case angles.

3. The end of the lower piece of the support member on the building structure side is a bent piece that extends downward. The protruding piece rises from the lower end of the opening formed in the surface, and the bent piece is located within the opening. The mounting structure for the case angle according to claim 2.

4. The case angle supporting the shutter case is supported by the main body at both ends and in the middle along its length. The aforementioned intermediate portion of the case angle is attached to a hook fitting provided on the building structure. The aforementioned hook fitting comprises a surface portion fixed to the frame corresponding to the intermediate portion of the case angle, a retaining piece integrally formed at the upper end of the surface portion, and a locking portion formed on the surface portion located below the retaining piece. The case angle has a rear portion that is spaced apart from the front portion of the hook fitting, and a support member is fixed to the rear portion so that the case angle and the support member are integrated, and the support member has a lower portion that is located below the lower piece of the lower end of the rear portion of the case angle. The upper part of the case angle is hooked onto the retaining piece, and the lower part of the support member is engaged with the retaining portion, thereby supporting the case angle from below. Mounting structure for case angles.

5. The locked portion is the lower edge of the opening formed on the surface of the hook fitting, The mounting structure for the case angle according to claim 4.

6. The locking portion is a protruding piece formed to protrude in a rising manner on the surface of the hook fitting. The mounting structure for the case angle according to claim 4.

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