Frame unit assembly structure

Abstract

To reduce the number of parts, to simplify the attaching / detaching work of a frame unit to / from an installation frame, and to improve a water cut-off structure when the frame unit such as a sash is detachably assembled to the installation frame installed on a skeleton opening.SOLUTION: Indoor side and outdoor side projecting pieces 13b, 13d projecting toward a sash upper frame 4 are provided on an installation upper frame 13, while indoor side and outdoor side abutting pieces 4b, 4e abutting against the indoor side and outdoor side projecting pieces 13b, 13d are provided on the sash upper frame 4 by incorporating the sash upper frame into the installation upper frame from the outdoor direction, the indoor side projecting piece 13b and the indoor side abutting piece 4b, and the outdoor side projecting piece 13d and the outdoor side abutting pieces 4b, 4e are fastened together with screws 17, 18, a screw 18 fastening section is positioned closer to the indoor side than the outdoor side end sections of the installation upper frame and the sash upper frame, the outdoor side of the screw 18 fastening section is terminated at an opening 19, and a water cut-off member 20 is arranged on the indoor side of the opening 19.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a mounting structure for a frame unit such as a sash when the frame unit is mounted on a building skeleton side.

Background Art

[0002] Conventionally, when a frame unit such as a sash is mounted to an opening of a building skeleton, the frame unit is mounted in a state where the indoor-side half of the frame unit is embedded in the building skeleton such as a wall. For this reason, to remove the frame unit such as a sash, it is necessary to dismantle parts of the building skeleton such as eaves, internal ceilings, floors, and walls, and the frame unit may be damaged during the dismantling work, resulting in a problem that it is difficult to reuse the frame unit. Accordingly, there is conventionally known a technique in which a sash frame has a double-frame structure composed of an outer peripheral frame fixed to the building skeleton side and an inner peripheral frame fixed in the outer peripheral frame by screws or the like, so that the inner peripheral frame can be attached to and detached from the outer peripheral frame while the outer peripheral frame remains fixed to the building skeleton side (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the invention described in Patent Document 1 uses T-shaped or plate-shaped connecting pieces as fixing members to secure the outer frame and the inner frame, which results in an increase in the number of parts. Furthermore, in Patent Document 1, in order to seal the outdoor screw fastening portion between the outer frame and the inner frame, the inner frame is made to protrude further outward than the outer frame, and the space between the protruding portion of the inner frame and the building structure is sealed with caulk. As a result, when removing the inner frame from the outer frame, it is necessary to peel off the caulk from the building structure, which is time-consuming, and this is the problem that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention was created in view of the above circumstances and with the aim of solving these problems, and the invention of claim 1 is for attaching a frame unit, in which an upper frame, a lower frame, and left and right vertical frames are formed as a frame, to an installation frame fixed to the inner circumference of an opening in a building structure, wherein the installation frame comprises an installation upper frame to which the frame unit upper frame is attached, the installation upper frame comprises an installation upper frame main body located above the frame unit upper frame, and indoor and outdoor protruding pieces that protrude downward from the indoor and outdoor portions of the installation upper frame main body, and the frame unit upper frame is assembled into the installation upper frame from the outdoor direction The frame is configured to be detachably fixed on both the indoor and outdoor sides by fastening the indoor and outdoor abutment pieces, respectively, with fastening members to secure the indoor abutment piece to the indoor abutment piece and the outdoor abutment piece to the outdoor abutment piece. The fastening portion between the outdoor abutment piece and the outdoor abutment piece is positioned on the indoor side of the main body of the frame and the outdoor abutment piece, and the outdoor side of the fastening portion is open, allowing fastening between the outdoor abutment piece and the outdoor abutment piece through this opening. A watertight member is provided on the indoor side of the opening to seal the fastening portion. Furthermore, the installation frame includes an installation vertical frame to which either the left or right vertical frame of the frame unit is assembled, and the installation vertical frame includes an installation vertical frame main body located on the left and right outer sides of the frame unit vertical frame, and indoor and outdoor protruding pieces that protrude toward the frame unit vertical frame from the indoor and outdoor sides of the installation vertical frame main body, and the frame unit vertical frame includes indoor and outdoor contact pieces that abut against the indoor and outdoor protruding pieces, respectively, when the frame unit vertical frame is assembled into the installation vertical frame from the outdoor side, and these indoor The installation vertical frame and the frame unit vertical frame are fixed detachably on both the indoor and outdoor sides by fastening the protruding piece to the indoor side contact piece and the outdoor side protruding piece to the outdoor side contact piece with fastening members. On the other hand, the fastening portion between the outdoor side protruding piece and the outdoor side contact piece is positioned on the indoor side of the installation vertical frame main body and the outdoor side end of the frame unit vertical frame, and the outdoor side of the fastening portion is left open so that the outdoor side protruding piece and the outdoor side contact piece can be fastened through this opening, and a water-sealing member is provided on the indoor side of the opening to seal the fastening portion. This is a frame unit assembly structure characterized by the following: The invention of claim 2 is a frame unit assembly structure characterized in that, in claim 1, a water-stopping member is provided between the indoor-side protruding piece of the installation upper frame and the indoor-side contact piece of the frame unit upper frame, which is pressed and stops water flow by bringing the indoor-side protruding piece and the indoor-side contact piece into contact. The invention of claim 3 is, 1 In this frame unit assembly structure, the installation frame comprises an installation lower frame onto which the frame unit lower frame is assembled, the installation lower frame comprises an installation lower frame main body on which the frame unit lower frame is placed, and an indoor projection piece projecting upward from the indoor side of the installation lower frame main body, while the frame unit lower frame comprises an indoor contact piece that abuts against the indoor projection piece from the outdoor side when the frame unit lower frame is assembled into the installation lower frame from the outdoor side, and the installation lower frame and the frame unit lower frame are detachably fixed by fastening these indoor projection piece and indoor contact piece with a fastening member, and a water-stopping member is provided between the indoor projection piece and the indoor contact piece, which is pressed and stops water when the indoor projection piece and the indoor contact piece come into contact. The invention of claim 4 is, 1 The frame unit assembly structure is characterized by having a water-stopping member provided between the indoor-side protruding piece of the installation vertical frame and the indoor-side contact piece of the frame unit vertical frame, which is pressed against the indoor-side protruding piece and the indoor-side contact piece to stop water from leaking. The invention of claim 5 is, In order to detachably assemble a frame unit, in which an upper frame, a lower frame, and left and right vertical frames are formed as a frame, to an installation frame fixed to the inner circumference of the opening in the building structure, the installation frame includes an installation upper frame to which the frame unit upper frame is assembled, the installation upper frame includes an installation upper frame main body located above the frame unit upper frame, and indoor and outdoor protruding pieces that protrude downward from the indoor and outdoor portions of the installation upper frame main body, the frame unit upper frame comes into contact with the indoor and outdoor protruding pieces from the outdoor direction when the frame unit upper frame is assembled into the installation upper frame from the outdoor direction The structure includes inner and outer contact pieces, and fastens these indoor protruding pieces to the indoor contact pieces and the outdoor protruding pieces to the outdoor contact pieces with fastening members, thereby detachably fixing the upper frame and the upper frame unit on both the indoor and outdoor sides. Meanwhile, the fastening portion between the outdoor protruding piece and the outdoor contact piece is positioned on the indoor side of the main body of the upper frame unit and the outdoor end of the upper frame unit, and the outdoor side of the fastening portion is open, allowing fastening between the outdoor protruding piece and the outdoor contact piece through this opening. Furthermore, a watertight member is provided on the indoor side of the opening to seal the fastening portion, and further,This frame unit assembly structure is characterized by the fact that, when assembling multiple frame units adjacent to each other on an installation frame, an outdoor-side protruding piece is provided on the outdoor-side portion of the adjacent frame unit's vertical frame of one adjacent frame unit, projecting toward the adjacent frame unit's vertical frame of the other frame unit, while an outdoor-side contact piece is provided on the adjacent frame unit's vertical frame of the other frame unit, abutting against the outdoor-side protruding piece from the outdoor direction, and the adjacent frame units' vertical frames are detachably connected by fastening these outdoor-side protruding piece and outdoor-side contact piece with a fastening member, while the fastening portion between the outdoor-side protruding piece and the outdoor-side contact piece is positioned on the indoor side of the outdoor-side end of the adjacent frame unit's vertical frame, and the outdoor side of the fastening portion is open, allowing fastening between the outdoor-side protruding piece and the outdoor-side contact piece through the opening, and a water-stopping member is provided on the indoor side of the opening to stop water from entering the fastening portion. The invention of claim 6 is, 5 In this frame unit assembly structure, an indoor-side engaging receiving portion is provided on the indoor-side portion of the adjacent frame unit vertical frame of one adjacent frame unit, projecting toward the adjacent frame unit vertical frame of the other frame unit; an indoor-side engaging portion is provided on the adjacent frame unit vertical frame of the other frame unit, engaging with the indoor-side engaging receiving portion from the outdoor direction; and a water-stopping member is provided between these indoor-side engaging receiving portions and the indoor-side engaging portion, which is pressed and stops water when the indoor-side engaging portion engages with the indoor-side engaging receiving portion. The invention of claim 7 is, In order to detachably assemble a frame unit, in which an upper frame, a lower frame, and left and right vertical frames are formed as a frame, to an installation frame fixed to the inner circumference of the opening in the building structure, the installation frame includes an installation upper frame to which the frame unit upper frame is assembled, the installation upper frame includes an installation upper frame main body located above the frame unit upper frame, and indoor and outdoor protruding pieces that protrude downward from the indoor and outdoor portions of the installation upper frame main body, the frame unit upper frame comes into contact with the indoor and outdoor protruding pieces from the outdoor direction when the frame unit upper frame is assembled into the installation upper frame from the outdoor direction The structure includes inner and outer contact pieces, and fastens these indoor protruding pieces to the indoor contact pieces and the outdoor protruding pieces to the outdoor contact pieces with fastening members, thereby detachably fixing the upper frame and the upper frame unit on both the indoor and outdoor sides. Meanwhile, the fastening portion between the outdoor protruding piece and the outdoor contact piece is positioned on the indoor side of the main body of the upper frame unit and the outdoor end of the upper frame unit, and the outdoor side of the fastening portion is open, allowing fastening between the outdoor protruding piece and the outdoor contact piece through this opening. Furthermore, a watertight member is provided on the indoor side of the opening to seal the fastening portion, and further, This frame unit assembly structure is characterized in that, when assembling a pair of frame units in a corner shape to an installation frame, the vertical frames of the corner-side frame units of the pair of frame units are detachably connected to each other via corner mullions, while the installation frame comprises an upper installation frame and a lower installation frame to which the upper and lower frames of the pair of frame units are assembled, and the upper and lower parts of the corner mullions are detachably fixed to these upper and lower installation frames. The invention of claim 8 is, 7In this frame unit assembly structure, the corner mullion comprises a pair of corner mullion vertical frames to which the corner side frame unit vertical frames of the pair of frame units are detachably connected, and the outdoor side portion of the corner mullion vertical frame is provided with an outdoor side projection piece that protrudes toward the corner side frame unit vertical frame, while the corner side frame unit vertical frame is provided with an outdoor side contact piece that abuts against the outdoor side projection piece from the outdoor direction, and the corner mullion vertical frame and the corner side frame unit vertical frame are detachably connected by fastening these outdoor side projection piece and outdoor side contact piece with a fastening member, while the fastening portion between the outdoor side projection piece and the outdoor side contact piece is located on the indoor side of the outdoor side of the corner mullion vertical frame and the corner side frame unit vertical frame, and the outdoor side of the fastening portion is open, allowing fastening between the outdoor side projection piece and the outdoor side contact piece from the opening, and a water-stopping member is provided on the indoor side of the opening to stop water from entering the fastening portion. [Effects of the Invention]

[0006] By adopting the invention of claim 1, the upper frame of the frame unit can be fixed to the installation upper frame without requiring a dedicated fixing member, contributing to a reduction in the number of parts, and the installation and removal of the upper frame of the frame unit to the installation upper frame can be easily performed. Moreover, watertight sealing can be reliably achieved at the fastening portion between the outdoor side protruding piece of the installation upper frame and the outdoor side contact piece of the upper frame of the frame unit, and the design can be improved. Furthermore, the vertical frame of the frame unit can be fixed to the installation vertical frame without the need for special fixing members, contributing to a reduction in the number of parts, and the installation and removal of the vertical frame of the frame unit to the installation vertical frame can be easily performed. In addition, watertight sealing can be reliably achieved at the fastening joint between the outdoor side protruding piece of the installation vertical frame and the outdoor side contact piece of the vertical frame of the frame unit, and it can also contribute to an improved design. By adopting the invention of claim 2, watertight sealing can be reliably achieved between the indoor-side protruding piece of the upper mounting frame and the indoor-side contact piece of the upper frame of the frame unit. By adopting the invention of claim 3, the lower frame of the frame unit can be fixed to the installation lower frame without requiring a dedicated fixing member, contributing to a reduction in the number of parts, and the installation and removal of the lower frame of the frame unit to the installation lower frame can be easily performed. Moreover, watertight sealing can be reliably achieved between the indoor side protruding piece of the installation lower frame and the indoor side contact piece of the lower frame of the frame unit. Claim 4 This invention ensures reliable watertight sealing between the indoor-side protruding piece of the installation vertical frame and the indoor-side contact piece of the frame unit vertical frame. By adopting the invention of claim 5, The upper frame of the frame unit can be fixed to the installation upper frame without the need for special fixing members, contributing to a reduction in the number of parts, and the installation and removal of the upper frame of the frame unit to the installation upper frame can be easily performed. Moreover, it ensures reliable watertightness at the fastening joint between the outdoor side protruding piece of the installation upper frame and the outdoor side contact piece of the upper frame of the frame unit, and contributes to improved aesthetics. Moreover The adjacent vertical frame members of the laterally adjacent frame units can be easily connected to each other. Moreover, water stoppage at the fastening portion between the outdoor-side protruding piece and the outdoor-side abutting piece of the adjacent vertical frame members can be reliably achieved, which also contributes to the improvement of design performance. Claim 6 According to the invention of the present application, water stoppage between the indoor-side engagement receiving portion and the indoor-side engagement portion of the adjacent vertical frame members of the laterally adjacent frame units can be reliably achieved. Claim 7 According to the invention of the present application, The upper frame of the frame unit can be fixed to the installation upper frame without the need for special fixing members, contributing to a reduction in the number of parts, and the installation and removal of the upper frame of the frame unit to the installation upper frame can be easily performed. Moreover, it ensures reliable watertightness at the fastening joint between the outdoor side protruding piece of the installation upper frame and the outdoor side contact piece of the upper frame of the frame unit, and contributes to improved aesthetics. Furthermore, the corner mullion that connects the corner-side vertical frame members of the frame units arranged in a corner shape can be removed from the installation upper frame and the installation lower frame, and reused at other locations. Claim 8 According to the invention of the present application, the corner vertical frame member and the corner-side vertical frame member of the frame unit can be easily connected to each other. Moreover, water stoppage at the fastening portion between the outdoor-side protruding piece of the corner vertical frame member and the corner-side vertical frame member of the frame unit can be reliably achieved, which also contributes to the improvement of design performance. Brief Description of the Drawings

[0007] [Figure 1] It is an expanded front view of the sash device. [Figure 2] It is a cross-sectional view of the sash device. [Figure 3] It is a longitudinal cross-sectional view of the main part of the sash device. [Figure 4] It is a diagram showing the assembly of the sash upper frame to the installation upper frame. [Figure 5] It is a diagram showing the assembly of the sash lower frame to the installation lower frame. [Figure 6] It is a diagram showing the process of assembling the sash to the installation frame. [Figure 7] It is a diagram showing the assembly of the sash provided with a smoke exhaust window to the installation frame. [Figure 8] It is a cross-sectional view of the main part of the sash device. [Figure 9]This is a diagram showing the assembly of a sash vertical frame to an installation vertical frame. [Figure 10] This is a diagram showing the connection between sash vertical frames. [Figure 11] This is a diagram showing the connection of sash vertical frames of a sash provided with an automatic door. [Figure 12] This is a diagram showing the connection between a corner mullion and a sash vertical frame. [Figure 13] This is a diagram showing the connection between a corner mullion and a sash vertical frame of a sash provided with a smoke exhaust window. [Figure 14] This is a diagram showing the removal procedure of the corner mullion. [Figure 15] This is a diagram showing the removal procedure of the door body of the automatic door.

[0008] Hereinafter, embodiments of the present invention will be described based on the drawings. In Figure 1 and Figure 2, reference numeral 1 denotes a sash device installed in an opening of a store or the like, and the sash device 1 is configured using an installation frame 2 fixed to the building skeleton side such as a wall, ceiling, beam, floor, and angle member, and a reusable sash (corresponding to the frame unit of the present invention) 3 (3A to 3G) that is detachably assembled to the installation frame 2. In the present embodiment, the sash device 1 is provided in an L shape in a plan cross-sectional view as shown in Figure 2, and a plurality of sashes 3 are arranged in a state of being adjacent in the left-right direction or in a state of being adjacent in a corner shape.

[0009] The aforementioned sash 3 is formed by a frame structure consisting of an upper sash frame (corresponding to the upper frame of the frame unit of the present invention) 4, a lower sash frame (corresponding to the lower frame of the frame unit of the present invention) 5, and left and right vertical sash frames (corresponding to the vertical frames of the frame unit of the present invention) 6. A flat panel body 8 made of glass or the like is incorporated into the frame formed by the upper sash frame 4, lower sash frame 5, and left and right vertical sash frames 6. In this embodiment, sashes 3A and 3B shown in Figure 1 are arranged adjacent to each other in a corner, and sashes 3B to 3G are arranged adjacent to each other left and right. Furthermore, sashes 3B, 3C, and 3E are partitioned vertically by a transom 10, and the panel body 8 is incorporated into the partitioned upper and lower frames. Furthermore, sash 3D is partitioned vertically by a transom 10, and the panel body 8 is incorporated into the upper frame, while a sliding automatic door 11 is incorporated into the lower frame. Furthermore, the sash 3F is divided vertically by a transom 10, with an openable and closable smoke vent window 12 incorporated into the upper frame and a panel body 8 incorporated into the lower frame. In the following description, when it is not necessary to distinguish between these sashes 3A to 3G, they will simply be referred to as sash 3.

[0010] On the other hand, the installation frame 2 is formed by an upper installation frame 13, a lower installation frame 14, and left and right installation vertical frames 15, to which the upper sash frame 4, lower sash frame 5, and left and right sash vertical frames 6 (in this embodiment, the left sash vertical frame 6 of the leftmost sash 3A in Figure 1, and the right sash vertical frame 6 of the rightmost sash 3G) of the sash 3 are respectively assembled. The multiple sashes 3 are then detachably attached to the inner circumference of the framed installation frame 2. In Figure 1, the left and right outer sash vertical frames 6 of the sashes 3 located at the left and right outer ends of the sash device 1 (the left sash vertical frame 6 of sash 3A and the right sash vertical frame 6 of sash 3G) are assembled to the installation vertical frame 15. However, the sashes 3 located on the left and right inner sides of the sash device 1 (sashes 3B to 3F) are not assembled to the installation vertical frame 15, and adjacent sashes 3 are connected to each other. Furthermore, sashes 3 arranged adjacent to each other in a corner configuration (sashes 3A and sashes 3B) are connected via a corner mullion 9, which will be described later.

[0011] Next, regarding the assembly of the sash upper frame 4 to the installation upper frame 13, we will explain using Figures 3 and 4 as an example, in which the sash upper frame 4 with the panel body 8 incorporated is assembled to the installation upper frame 13. The upper frame 13 is fixed to the building structure and comprises an upper frame body 13a that is located above the upper frame 4 of the sash and extends in the left-right direction, an indoor protruding piece 13b that is formed to protrude downward from the indoor end of the upper frame body 13a, an outdoor visible surface 13c that is formed to protrude upward from the outdoor end of the upper frame body 13a, and an outdoor protruding piece 13d that is located on the indoor side of the outdoor visible surface 13c but on the outdoor side of the center position of the upper frame body 13a in the indoor-outdoor direction. On the other hand, the sash upper frame 4 is configured to include a lower visible surface portion 4a into which the upper end of the panel body 8 is fitted and supported, an indoor visible surface portion 4b (corresponding to the indoor contact piece of the frame unit upper frame of the present invention) which is the indoor end surface of the sash upper frame 4 and abuts against the indoor protruding piece 13b of the installation upper frame 13 from the outdoor direction, an outdoor visible surface portion 4c which is the outdoor end surface of the sash upper frame 4, an upper visible surface portion 4d which is bent inward from the upper part of the outdoor visible surface portion 4c and whose indoor end is located on the outdoor side of the indoor-outdoor center position of the sash upper frame 4, and an outdoor contact piece 4e which is formed to protrude upward from the indoor end of the upper visible surface portion 4d and abuts against the outdoor protruding piece 13d of the installation upper frame 13 from the outdoor direction. Then, the sash upper frame 4 is assembled from the outside to the inner circumference (lower side) of the installation upper frame 13, and the indoor protruding piece 13b of the installation upper frame 13 is brought into contact with the indoor visible surface portion 4b of the sash upper frame 4, and the outdoor protruding piece 13d of the installation upper frame 13 is brought into contact with the outdoor contact piece 4e of the sash upper frame 4. The indoor protruding piece 13b and the indoor visible surface portion 4b are fastened with a screw (corresponding to the fastening member of the present invention) 17 that is screwed in from the indoor direction, and the outdoor protruding piece 13d and the outdoor contact piece 4e are fastened with a screw (corresponding to the fastening member of the present invention) 18 that is screwed in from the outdoor direction, thereby so that the sash upper frame 4 is detachably fixed to the installation upper frame 13 from both the indoor and outdoor sides. Furthermore, when attaching the sash upper frame 4 to the installation upper frame 13, as shown in Figure 6, with the sash lower frame 5 placed on the installation lower frame 14, the sash 3 is pushed in from the outside and fitted into the inner circumference of the installation upper frame 13, thereby allowing the indoor side protruding piece 13b and the indoor side visible surface 4b, and the outdoor side protruding piece 13d and the outdoor side contact piece 4e to come into contact.

[0012] Furthermore, the outdoor protruding piece 13d of the installation upper frame 13 and the outdoor contact piece 4e of the sash upper frame 4 are located on the indoor side of the outdoor visible surfaces 13c and 4c, which are the outdoor end faces of the installation upper frame 13 and the sash upper frame 4, respectively. The outdoor visible surfaces 13c and 4c of the installation upper frame 13 and the sash upper frame 4 are spaced apart in the vertical direction. As a result, the outdoor side of the screw 18 fastening portion between the outdoor protruding piece 13d of the installation upper frame 13 and the outdoor contact piece 4e of the sash upper frame 4 is open 19. The screw 18 fastening between the outdoor protruding piece 13d and the outdoor contact piece 4e can be performed through this opening 19, and a dry water-stopping member 20 made of an elastic material such as fin-shaped rubber is provided on the indoor side of the opening 19. The water-stopping member 20 is positioned midway between the outdoor-side visible surface portion 13c and the outdoor-side protruding piece 13d in the indoor-outdoor direction, with its upper end fitted and supported in the outdoor-side mounting groove 13e formed in the upper frame body portion 13a. The water-stopping member 20 covers the outdoor side of the screw fastening portion 18, thereby sealing the screw fastening portion 18 and preventing it from being visible from the outdoor side.

[0013] On the other hand, as mentioned above, the indoor-side protruding piece 13b of the installation upper frame 13 is formed to protrude downward from the indoor-side end of the installation upper frame main body 13a, and the indoor-side visible surface 4b of the sash upper frame 4 is fastened to the indoor-side protruding piece 13b with a screw 17 in contact with it from the outdoor direction. On the outdoor side of the protruding tip (lower part) of the indoor-side protruding piece 13b, a screw insertion groove 13f into which the screw 17 is inserted and an indoor-side mounting groove 13g are formed, and a dry-type water-stopping member 21 made of an elastic material such as rubber is fitted into the indoor-side mounting groove 13g. The water-stopping member 21 is pressed against the indoor-side protruding piece 13b by pressing the indoor-side visible surface 4b against the indoor-side protruding piece 13b from the outdoor direction and fastening with the screw 17, thereby stopping water from entering between the indoor-side visible surface 4b and the indoor-side protruding piece 13b. Figure 7 shows the sash upper frame 4, into which the smoke exhaust window 12 is incorporated, assembled to the installation upper frame 13. The sash upper frame 4 into which the smoke exhaust window 12 is incorporated has a different shape from the sash upper frame 4 into which the panel body 8 is incorporated, as described above. However, it similarly has an indoor side protruding piece 13b, an outdoor side protruding piece 13d, an indoor side contact piece (indoor side visible surface) 4b, and an outdoor side contact piece 4e that abut against the outdoor side protruding piece 13b and outdoor side protruding piece 13d from the outdoor direction. Furthermore, the outdoor side of the screw 18 fastening portion between the outdoor side protruding piece 13d and the outdoor side contact piece 4e is open 19, and a dry-type water-stopping member 20 that covers the screw 18 fastening portion and stops water is provided on the indoor side of the opening 19. In addition, a water-stopping member 21 that is pressed by the screw 17 fastening and stops water is also provided between the indoor side protruding piece 13b and the indoor side contact piece 4b.

[0014] Next, regarding the assembly of the sash lower frame 5 to the installation lower frame 14, we will explain using Figures 3 and 5 as an example, showing the case where the sash lower frame 5 with the panel body 8 incorporated is assembled to the installation lower frame 14. The installation lower frame 14 is fixed to the building structure via anchors or the like, and comprises an installation lower frame main body 14a that extends in the left-right direction and on which the sash lower frame 4 is placed, and an indoor protruding piece 14b that is formed to protrude upward from the indoor end of the installation lower frame main body 14a. On the other hand, the sash lower frame 5 is configured to include an upper visible surface portion 5a into which the lower end of the panel body 8 is fitted and supported, an indoor visible surface portion 5b (corresponding to the indoor contact piece of the frame unit lower frame of the present invention) which is the indoor end surface of the sash lower frame 5 and contacts the indoor protruding piece 14b of the installation lower frame 14 from the outdoor direction, an outdoor visible surface portion 5c which is the outdoor end surface of the sash lower frame 5, and a lower visible surface portion 5d which contacts the upper surface of the installation lower frame body portion 14a. Then, the sash lower frame 5 is assembled from the outdoor side onto the inner circumference (upper side) of the installation lower frame 14, bringing the indoor side protruding piece 14b of the installation lower frame 14 into contact with the indoor side visible surface portion 5b of the sash lower frame 5. These indoor side protruding piece 14b and indoor side visible surface portion 5b are fastened together with screws (corresponding to the fastening member of the present invention) 22 that are screwed in from the indoor side, thereby detachably fixing the sash lower frame 5 to the installation lower frame 14.

[0015] Furthermore, as mentioned above, the indoor-side protruding piece 14b of the installation lower frame 14 is formed to protrude upward from the indoor-side end of the installation lower frame body 14a, and the indoor-side visible surface 5b of the sash lower frame 5 is fastened to the indoor-side protruding piece 14b with screws 22 while in contact with it from the outdoor direction. On the outdoor side of the protruding tip (upper part) of the indoor-side protruding piece 14b, a screw insertion groove 14c into which the screws 22 are inserted and an indoor-side mounting groove 14d are formed, and a dry-type water-stopping member 21 made of an elastic material such as rubber is fitted into the indoor-side mounting groove 14d. The water-stopping member 21 is pressed against the indoor-side protruding piece 14b by pressing the indoor-side visible surface 5b against the indoor-side protruding piece 14b from the outdoor direction and fastening with screws 22, thereby stopping water from entering between the indoor-side visible surface 5b and the indoor-side protruding piece 14b.

[0016] Next, regarding the assembly of the sash vertical frame 6 to the installation vertical frame 15, we will explain using Figure 9 as an example, where the right sash vertical frame 6 of the sash 3 located at the right end of the sash device 1 is assembled to the right installation vertical frame 15. In this explanation and in Figure 9, the sash vertical frame 6 assembled to the installation vertical frame 15 will be referred to as sash vertical frame 6A. The installation vertical frame 15 is fixed to the building structure and comprises an installation vertical frame main body 15a that extends vertically and is located to the left and right outward (to the right in Figure 9) of the sash vertical frame 6A; an indoor protruding piece 15b that is formed to protrude inward to the left and right (to the left in Figure 9, towards the sash vertical frame 6A) from the indoor end of the installation vertical frame main body 15a; an outdoor visible surface 15c that is formed to protrude outward to the left and right (to the right in Figure 9, away from the sash vertical frame 6A) from the outdoor end of the installation vertical frame main body 15a; and an outdoor protruding piece 15d that is located on the indoor side of the outdoor visible surface 15c but is located on the outdoor side of the center position of the installation vertical frame main body 15a in the indoor-outdoor direction, and protrudes inward to the left and right (to the left in Figure 9, towards the sash vertical frame 6). On the other hand, the sash vertical frame 6A is configured to include left and right inward-facing surface portions 6a into which the left and right ends (right end in Figure 9) of the panel body 8 are fitted and supported; an indoor-facing surface portion 6b (corresponding to the indoor-facing contact piece of the frame unit vertical frame of the present invention) which becomes the indoor-facing end surface of the sash vertical frame 6A and abuts against the indoor-facing projection piece 15b of the installation vertical frame 15 from the outdoor direction; an outdoor-facing surface portion 6c which becomes the outdoor-facing end surface of the sash vertical frame 6; left and right outward-facing surface portions 6d which connect the left and right outward-facing ends (right end in Figure 9) of the indoor-facing surface portion 6b and the outdoor-facing surface portion 6c; and an outdoor-facing contact piece 6e which protrudes outward from the left and right outward-facing surface portions 6d, while being located on the indoor side of the outdoor-facing surface portion 6c, but on the outdoor side of the indoor-outdoor center position of the sash vertical frame 6A, and abuts against the outdoor-facing projection piece 15d of the installation vertical frame 15 from the outdoor direction. Then, the sash vertical frame 6A is assembled from the outside to the inner circumference (left and right inward sides) of the installation vertical frame 15, and the indoor protruding piece 15b of the installation vertical frame 15 is brought into contact with the indoor visible surface portion 6b of the sash vertical frame 6A, and the outdoor protruding piece 15d of the installation vertical frame 15 is brought into contact with the outdoor contact piece 6e of the sash vertical frame 6A, and the indoor protruding piece 15b and the indoor visible surface portion 6b are fastened with a screw (corresponding to the fastening member of the present invention) 25 that is screwed in from the indoor direction, and the outdoor protruding piece 15d and the outdoor contact piece 6e are fastened with a screw (corresponding to the fastening member of the present invention) 26 that is screwed in from the outdoor direction, thereby so that the sash vertical frame 6A is fixed to the installation vertical frame 15 so as to be detachable from both the indoor and outdoor sides.

[0017] Furthermore, the outdoor protruding piece 15d of the installation vertical frame 15 and the outdoor contact piece 6e of the sash vertical frame 6A are located on the indoor side of the outdoor visible surfaces 15c and 6c, which are the outdoor end faces of the installation vertical frame 15 and the sash vertical frame 6A, respectively. The outdoor visible surfaces 15c and 6c of the installation vertical frame 15 and the sash vertical frame 6 are spaced apart in the left-right direction. As a result, the outdoor side of the screw 26 fastening portion between the outdoor protruding piece 15d of the installation vertical frame 15 and the outdoor contact piece 6e of the sash vertical frame 6A is open 27. The screw 26 fastening between the outdoor protruding piece 15d and the outdoor contact piece 6e can be performed through this opening 27, and a pair of dry water-stopping members 20 made of an elastic material such as fin-shaped rubber are provided on the indoor side of the opening 27. Furthermore, the outdoor side of the screw 26 fastening portion is covered by this pair of water-stopping members 20, thereby sealing the screw 26 fastening portion and preventing it from being visible from the outside. Here, one of the pair of water-stopping members 20 is installed with its base end fitted and supported in an outdoor mounting groove 15e formed in the main body 15a of the vertical frame 15, positioned midway between the outdoor visible surface 15c and the outdoor protruding piece 15d of the vertical frame 15 in the indoor-outdoor direction. The other water-stopping member 20 is installed with its base end fitted and supported in an outdoor mounting groove 6f formed in the left and right outer visible surface 6d of the vertical frame 6A, positioned midway between the outdoor visible surface 6c and the outdoor contact piece 6e of the vertical frame 6A. The tips of these pair of fin-shaped water-stopping members 20 are arranged to overlap, thereby ensuring reliable water-stopping of the screw fastening portion 26 even if the left-right width of the opening 27 increases or decreases due to dimensional errors or the like.

[0018] On the other hand, as mentioned above, the indoor-side protruding piece 15b of the installation vertical frame 15 is formed to protrude from the indoor-side end of the installation vertical frame body 15a toward the sash vertical frame 6A, and the indoor-side visible surface 6b of the sash vertical frame 6A is fastened to the indoor-side protruding piece 15b with a screw 25 while in contact with it from the outdoor direction. On the outdoor side of the protruding tip of the indoor-side protruding piece 15b, a screw insertion groove 15f into which the screw 25 is inserted and an indoor-side mounting groove 15g are formed, and a dry-type water-stopping member 21 made of an elastic material such as rubber is fitted into the indoor-side mounting groove 15g. The water-stopping member 21 is pressed when the indoor-side visible surface 6b is pressed against the indoor-side protruding piece 15b from the outdoor direction and fastened with a screw 25, thereby stopping water from entering between the indoor-side visible surface 6b and the indoor-side protruding piece 15b.

[0019] Next, the connection of sashes 3 arranged adjacent to each other on the left and right will be explained with reference to Figure 10. This connection of adjacent sashes 3 is achieved by connecting the adjacent vertical frames 6 of these sashes 3. In this explanation and in Figure 10, the adjacent vertical frame 6 of one of the adjacent sashes 3 will be referred to as the one-side sash vertical frame (corresponding to the adjacent frame unit vertical frame of one frame unit in the present invention) 6B, and the adjacent vertical frame of the other sash 3 will be referred to as the other-side sash vertical frame (corresponding to the adjacent frame unit vertical frame of the other frame unit in the present invention) 6C. The vertical sash frame 6B on one side (the left vertical sash frame 6B in Figure 10) has left and right inward projection surfaces 6a to which the left and right ends (right end in Figure 10) of the panel body 8 are fitted and supported, an indoor facing surface 6b which is the indoor end surface of the vertical sash frame 6B on one side, an outdoor facing surface 6c which is the outdoor end surface of the vertical sash frame 6B on one side, left and right outward projection surfaces 6d which connect the left and right outward ends (right end in Figure 10) of the indoor facing surface 6b and the outdoor facing surface 6c, and one side which is on the indoor side of the outdoor facing surface 6c. The structure comprises an outdoor protruding piece 6i that protrudes from the left and right outer surface portions 6d toward the other side sash vertical frame 6C, positioned on the outdoor side of the indoor-outdoor center position of the side sash vertical frame 6B; an indoor protruding piece 6g that extends flush with the indoor surface portion 6b and protrudes toward the other side sash vertical frame 6C; and a U-shaped indoor engaging groove portion 6h (forming the indoor engaging receiving portion of the present invention) formed at the protruding tip portion of the indoor protruding piece 6g (the end portion on the other side sash vertical frame 6C) with an open outdoor side. Furthermore, the other side sash vertical frame 6C (the right side sash vertical frame 6C in Figure 10) is formed to have left and right inward facing surfaces 6a, an indoor facing surface 6b, an outdoor facing surface 6c, and left and right outward facing surfaces 6d, similar to the one side sash vertical frame 6B. It also includes an outdoor contact piece 6e that protrudes from the left and right outward facing surfaces 6d toward the one side sash vertical frame 6B, while being located on the indoor side of the other side sash vertical frame 6C's center position in the indoor-outdoor direction, and contacts the outdoor side projecting piece 6i of the one side sash vertical frame 6B from the outdoor direction, and an engagement projection 6k (forming the indoor side engagement portion of the present invention) formed at the indoor end of the left and right outward facing surfaces 6d that engages with the indoor side engagement groove 6h of the one side sash vertical frame 6B from the outdoor side. Furthermore, the connection between the vertical frames 6B and 6C of adjacent sashes 3 is achieved by assembling the other vertical frame 6C onto the one vertical frame 6B from the outside, engaging the engaging projection 6k of the other vertical frame 6C with the indoor engaging groove 6h of the one vertical frame 6B, and bringing the outdoor protruding piece 6i of the one vertical frame 6B into contact with the outdoor contact piece 6e of the other vertical frame 6C. The connection is then fastened with a screw (corresponding to the fastening member of the present invention) 30 that is screwed in from the outside, thereby enabling the adjacent vertical frames 6 (one side and the other vertical frames 6B and 6C) to be detachably connected and fixed from the outside.

[0020] Furthermore, the outdoor protruding piece 6i of the vertical frame 6B on one side and the outdoor contact piece 6e of the vertical frame 6C on the other side are located on the indoor side of the outdoor visible surfaces 6c, 6c which are the outdoor end faces of the vertical frames 6B, 6C on the one side and the other side, respectively. The outdoor visible surfaces 6c of the vertical frames 6B, 6C on the one side and the other side are spaced apart in the left-right direction. As a result, the outdoor side of the screw 30 fastening portion between the outdoor protruding piece 6i and the outdoor contact piece 6e is open 31. The screw 30 fastening between the outdoor protruding piece 6i and the outdoor contact piece 6e can be performed through this opening 31, and a dry water-stopping member 20 made of an elastic material such as a fin-shaped rubber material is provided on the indoor side of the opening 31. The water-stopping member 20 is positioned midway between the outdoor-facing surface 6c and the outdoor-projecting piece 6i of one side sash vertical frame 6B in the indoor-outdoor direction, with its base end fitted and supported in the outdoor-side mounting groove 6f formed on the left and right outer-side projection surface 6d, and its tip is positioned midway between the outdoor-facing surface 6c and the outdoor-contacting piece 6e of the other side sash vertical frame 6C, with its tip supported in the outdoor-side mounting groove 6f formed on the left and right outer-side projection surface 6d. The water-stopping member 20 covers the outdoor side of the screw fastening portion 30, thereby sealing the screw fastening portion 30 and preventing it from being visible from the outside.

[0021] On the other hand, as mentioned above, an indoor-side engaging groove 6h is formed at the tip of the indoor-side protruding piece 6g of the indoor-side vertical frame 6B of one side sash, and the engaging projection 6k of the other side sash vertical frame 6C engages with the indoor-side engaging groove 6h from the outdoor side, and a dry-type water-stopping member 32 made of an elastic material such as rubber is fitted into the indoor-side engaging groove 6h. The water-stopping member 32 is pressed when the engaging projection 6k engages with it from the outdoor side, and it stops water from entering the engagement portion between the indoor-side engaging groove 6h and the engaging projection 6k. Figure 11 shows a diagram in which the sash vertical frame 6F of the sash 3D into which the automatic door 11 is incorporated is connected to the sash vertical frame 6B on one side. The sash vertical frame 6F of the sash 3D into which the automatic door 11 is incorporated has left and right inward facing surfaces 6a, indoor facing surfaces 6b, outdoor facing surfaces 6c, and left and right outward facing surfaces 6d. In addition, similar to the other sash vertical frame 6C, it has an outdoor facing surface 6e that abuts against the outdoor facing surface 6i of the sash vertical frame 6B from the outdoor direction, and an engaging projection 6k that engages with the indoor engaging groove 6h of the sash vertical frame 6B from the outdoor direction. The outdoor side of the screw 30 fastening portion between the outdoor facing surface 6i and the outdoor facing surface 6e is open 31, and a dry-type water-stopping member 20 that covers the screw 30 fastening portion and stops water from entering is provided on the indoor side of the opening 31. Furthermore, a water-stopping member 32 is also provided between the indoor-side engaging groove 6h and the engaging projection 6k. The left and right inward-facing projection surfaces 6a of the sash vertical frame 6F of the sash 3D into which the automatic door 11 is incorporated are formed flush with the surface, forming the left and right inward end surfaces of the sash vertical frame 6F.

[0022] Next, the connection between sashes 3 arranged adjacent to each other in a corner configuration will be explained based on Figure 12. These corner-adjacent sashes 3 are connected via corner mullions 9, as described above. In this explanation and in Figure 12, the corner-side sash vertical frame 6 of one of the corner-adjacent sashes 3 will be referred to as the first corner-side sash vertical frame 6D, and the corner-side sash vertical frame 6 of the other sash 3 will be referred to as the other corner-side sash vertical frame 6E. The corner mullion 9 is integrally formed such that the one-sided vertical mullion frame 33A, which is connected to the one-sided sash vertical frame 6D, and the other-sided vertical mullion frame 33B, which is connected to the other-sided sash vertical frame 6E, are at a right angle. The one-sided vertical mullion frame 33A and the other-sided vertical mullion frame 33B correspond to the pair of corner vertical mullions of the present invention. Furthermore, in the following description, the side of the one-sided and other-sided vertical mullions 33A and 33B that is connected to the one-sided and other-sided sash vertical frames 6D and 6E will be referred to as the outer corner, and the opposite side as the inner corner. In addition, in this embodiment, the one-sided vertical mullion frame 33A and the other-sided vertical mullion frame 33B are provided at a right angle, but the invention is not limited to this, and they may be provided at an acute angle or an obtuse angle. The aforementioned one-sided vertical frame 33A comprises an outdoor-side visible surface portion 33a which is the outdoor-side end face of the one-sided vertical frame 33A, an indoor-side visible surface portion 33b which is the indoor-side end face of the one-sided vertical frame 33A and whose position of the inner corner end is located further out of the corner than the position of the inner corner end of the outdoor-side visible surface portion 33a, a connecting piece 33c which extends inclined from the inner corner end of the indoor-side visible surface portion 33b toward the outdoors and toward the corner, an outer corner visible surface portion 33d which connects the outer corner ends of the outdoor-side visible surface portion 33a and the indoor-side visible surface portion 33b, an inner corner visible surface portion 33e which connects the inner corner ends of the outdoor-side visible surface portion 33a and the connecting piece 33c, and the outdoor-side visible The structure comprises an outdoor projection piece 33f that protrudes from the corner outer side facing surface 33d toward the corner sash vertical frame 6D, located on the indoor side of the surface 33a but on the outdoor side of the center position of the one side vertical frame 33A in the indoor-outdoor direction; an indoor projection piece 33g that extends flush with the indoor side facing surface 33b and protrudes toward the corner sash vertical frame 6D; a U-shaped indoor engagement groove 33h formed at the protruding tip of the indoor projection piece 33g (the end on the corner sash vertical frame 6D side) with an open outdoor side; and a nut plate groove 33i formed on the corner outer side of the corner inner side facing surface 33e, into which the nut plate 34 described later engages. Similarly, the other side vertical frame 33B is configured to include an outdoor-facing surface 33a, an indoor-facing surface 33b, a connecting piece 33c, a corner outer-facing surface 33d, a corner inner-facing surface 33e, an outdoor-facing protruding piece 33f, an indoor-facing protruding piece 33g, an indoor-facing engagement groove 33h, and a groove for a nut plate 33i. The one side vertical frame 33A and the other side vertical frame 33B are integrally formed such that the corner outer-facing surfaces 33d, 33d and the corner inner-facing surfaces 33e, 33e are at right angles to each other, and the connecting piece 33c is shared between the one side vertical frame 33A and the other side vertical frame 33B. On the other hand, the vertical sash frame 6D on one corner side and the vertical sash frame 6E on the other corner side have the same shape as, or a symmetrical shape to, the other side vertical sash frame 6C described above. To put it simply, they are formed to have left and right inward-facing surface portions 6a, indoor-facing surface portion 6b, outdoor-facing surface portion 6c, and left and right outward-facing surface portions 6d, similar to the other side vertical sash frame 6C. They are also formed to have an outdoor-side contact piece 6e that abuts against the outdoor-side protruding piece 33f of the one side and the other side vertical sash frames 33A and 33B from the outdoor direction, and an engaging projection 6k that engages with the indoor-side engaging groove portion 33h of the one side and the other side vertical sash frames 33A and 33B from the outdoor side. The connection between one side vertical frame 33A and one corner sash vertical frame 6D, and between the other side vertical frame 33B and the other corner sash vertical frame 6E, is performed with the corner mullion 6 fixed to the upper and lower installation frames 13 and 14, respectively, as will be described later. The one and the other corner sash vertical frames 6D and 6E are then assembled from the outdoor side to the one and the other side vertical frames 33A and 33B of the fixed corner mullion 9, and the one and the other side sash vertical frames 6D and 6E are then fitted into the indoor side engagement grooves 33h of the one and the other side vertical frames 33A and 33B. The engaging projections 6k of the corner-side sash vertical frames 6D and 6E are engaged, and the outdoor-side contact pieces 6e of the one and the other corner-side sash vertical frames 6D and 6E are brought into contact with the outdoor-side protruding pieces 33f of the one and the other side vertical vertical frames 33A and 33B, and fastened with screws (corresponding to the fastening member of the present invention) 40 that are screwed in from the outside, thereby enabling the one and the other side vertical vertical frames 33A and 33B and the one and the other corner-side sash vertical frames 6D and 6E to be detachably connected and fixed from the outside.

[0023] Furthermore, similar to the case of connecting the adjacent left and right sash vertical frames 6B and 6C described above, the outdoor side of the screw 40 fastening portion between the outdoor protruding piece 33f of the one and the other side vertical frame 33A and 33B and the outdoor contact piece 6e of the one and the other corner sash vertical frame 6D and 6E is left open 41. This allows the screw 40 to be fastened through the opening 41, and a dry-type water-stopping member 20 installed on the indoor side of the opening 41 seals the screw 40 fastening portion, preventing it from being visible from the outside. Additionally, a dry-type water-stopping member 32 installed at the engagement portion between the indoor-side engagement groove 33h of the one and the other side vertical frame 33A and 33B and the engagement projection 6k of the one and the other corner sash vertical frame 6D and 6E seals the engagement portion. Figure 13 shows how the sash vertical frames 6G and 6H, into which the smoke exhaust window 12 is incorporated, are assembled to the vertical frames 33A and 33B on one and the other side of the corner mullion 9. Although the shape of the sash vertical frames 6G and 6H into which the smoke exhaust window 12 is incorporated differs from the corner sash vertical frames 6D and 6E shown in Figure 12, similarly, the outdoor protruding pieces 33f of the outdoor vertical frames 33A and 33B are attached to the outdoor side The sash is equipped with an outdoor contact piece 6e that abuts from the opposite direction, and an engaging projection 6k that engages from the outdoor side with the indoor engaging groove 33h of the vertical mullions 33A and 33B on one side and the other side. The outdoor side of the screw (corresponding to the fastening member of the present invention) 43 fastening portion between the outdoor protruding piece 33f and the outdoor contact piece 6e has an opening 44, and a dry-type water-stopping member 20 is provided on the indoor side of the opening 44 to cover the screw 43 fastening portion and stop water from leaking. Furthermore, a water-stopping member 32 is also provided between the indoor engaging groove 33h of the vertical mullions 33A and 33B on one side and the other side and the engaging projection 6k of the vertical sash frames 6G and 6H.

[0024] As described above, the corner mullion 9 is fixed to the upper mounting frame 13 and the lower mounting frame 14. In this case, the upper mounting frame body 13a of the upper mounting frame 13 and the lower mounting frame body 14a of the lower mounting frame 14 extend to the location where the corner mullion 9 is installed. The upper and lower parts of the corner mullion 9 are detachably fixed to these extended upper mounting frame body 13a and lower mounting frame body 14a from the outdoor side via fixing brackets 35, respectively (the fixing brackets 35 that fix the upper part of the corner mullion 9 are not shown). Regarding the fixing bracket 35, let us take as an example a fixing bracket 35 that fixes the lower part of the corner member 9 to the main body of the installation frame 14a. The fixing bracket 35 is formed by bending a first mounting piece 35a and a second mounting piece 35b into an L shape. The first mounting piece 35a is detachably fixed to the main body of the installation frame 14a via a screw 36, and the second mounting piece 35b is detachably fixed to the inner corner projection surface 33e of the one-sided and other-sided vertical frame 33A and 33B via a screw 37. In this case, the screw 37 is screwed into a nut plate 34 that engages with a groove 33i for a nut plate formed on the inner corner projection surface 33e. In the figure, 38 is a cover body that covers the inner corner of the corner mullion 9. Furthermore, the reference numerals 13h and 14e shown in Figures 4 and 5 indicate grooves for nut plates (not shown) into which screws 36 and 37 are engaged, in the extended portions of the upper and lower mounting frame body 13a and 14a, respectively, which extend to the location where the corner mullions 9 are installed.

[0025] Here, the procedure for removing the corner mullion 9 from the upper mounting frame 13 and the lower mounting frame 14 will be explained based on Figure 14. First, to remove the corner mullion 9, the cover body 38 is removed, and then the screws 40 fastening between the outdoor protruding pieces 33f of the vertical mullion frames 33A and 33B on one side and the other side and the outdoor contact pieces 6e of the vertical sash frames 6D and 6E on the one side and the other side are released, and the sash 3 on which the vertical sash frames 6D and 6E on the one side and the other side are installed is removed from the corner mullion 9. In this state, the corner mullion 9 is removed from the upper mounting frame 13 and the lower mounting frame 14 by removing the screws 36 and 37 for the fixing bracket 35 that fixes the vertical mullion frames 33A and 33B of the corner mullion 9 to the upper mounting frame 13 and the lower mounting frame 14. Furthermore, the removed corner mullions 9, fixing brackets 35, and sashes 3 are reusable.

[0026] Furthermore, in this embodiment, the automatic door 11 can also be removed from the sash 3D. The automatic door 11 is composed of a door body 45 that can slide freely in the left-right direction, a suspension roller 47 attached to the upper end of the door body 45 via a roller support member 46, a guide rail 48 that guides the suspension roller 47 to roll freely in the left-right direction, a retaining body 49 fixed to the roller support member 46 via a bolt 49a to prevent the suspension roller 47 from coming off the guide rail 48, a sway-stopping body 50 attached to the lower end of the door body 45, a guide groove 51 laid on the floor surface to guide the sway-stopping body 50 to move freely in the left-right direction, an opening and closing mechanism 52 that is linked to the roller support member 46 and drives the door body 45 to slide left and right, a cover body 53 that covers the opening and closing mechanism 52, and the like. To remove the door body 45 from the sash 3D, as shown in Figure 15, the cover body 53 is removed, and the bolt 49a is loosened to remove the retaining body 49 from the roller support member 46. Then, the door body 45 is lifted and tilted inward with the suspension roller 47 lifted off the guide rail 48, thereby allowing the door body 45 to be removed from the sash 3D. The removed door body 45 and the sash 3C from which the door body 45 has been removed are reusable.

[0027] In this embodiment, configured as described above, the sash device 1 is constructed by detachably assembling a plurality of sashes 3, each consisting of a sash upper frame 4, a sash lower frame 5, and left and right sash vertical frames 6, to an installation frame 2 fixed to the inner circumference of the opening in the building structure. The installation frame 2 is constructed by an installation upper frame 13, an installation lower frame 14, and an installation vertical frame 15, to which the sash upper frame 4, sash lower frame 5, and sash vertical frames 6 are respectively assembled. The upper mounting frame 13 comprises an upper mounting frame body portion 13a located above the upper sash frame 4, and indoor and outdoor protruding pieces 13b and 13d that protrude downward from the indoor and outdoor portions of the upper mounting frame body portion 13a, respectively. The upper sash frame 4 comprises an indoor contact piece (indoor visible surface portion) 4b and an outdoor contact piece 4e that come into contact with the indoor and outdoor protruding pieces 13b and 13d from the outdoor direction when the upper sash frame 4 is assembled into the upper mounting frame 13 from the outdoor direction. Then, by fastening the indoor protruding piece 13b and the indoor contact piece 4b, and the outdoor protruding piece 13d and the outdoor contact piece 4e with screws 17 and 18, respectively, the installation upper frame 13 and the sash upper frame 4 are fixed together so that they can be detachably attached on both the indoor and outdoor sides. In this case, the screw 18 fastening portion between the outdoor protruding piece 13d and the outdoor contact piece 4e is located on the indoor side of the installation upper frame body 13a and the outdoor end of the sash upper frame 4, and the outdoor side of the screw 18 fastening portion is open 19, allowing the screw 18 fastening between the outdoor protruding piece 13d and the outdoor contact piece 4e to be performed through the opening 19, and a water-stopping member 20 is provided on the indoor side of the opening 19 to stop water from entering the screw 18 fastening portion.

[0028] As described above, in this embodiment, by assembling the sash upper frame 4 into the installation upper frame 13 from the outdoor side, the indoor side protruding piece 13b and the indoor side contact piece 4b, and the outdoor side protruding piece 13d and the outdoor side contact piece 4e are fastened together with screws 17 and 18, respectively, thereby detachably fixing the sash upper frame 4 to the installation upper frame 13. This allows the sash upper frame 4 to be fixed to the installation upper frame 13 without requiring a dedicated fixing member, contributing to a reduction in the number of parts, and also makes it easy to attach and detach the sash upper frame 4 to the installation upper frame 13. As a result, the workability can be greatly improved when removing the sash 3 from the installation frame 2 and reusing the sash 3 elsewhere, or when replacing only the sash 3 while leaving the installation frame 2 as is.

[0029] Furthermore, the screw 18 fastening portion between the outdoor protruding piece 13d of the installation upper frame 13 and the outdoor contact piece 4e of the sash upper frame 4 is located on the indoor side of the outdoor ends of the installation upper frame 13 and the sash upper frame 4, and the outdoor side of the screw 18 fastening portion is open 19. Therefore, the screw 18 can be fastened through the opening 19, and space can be secured on the indoor side of the opening 19 to install a water-stopping member 20. The water-stopping member 20 installed in this space ensures reliable water sealing of the screw 18 fastening portion, and the screw 18 fastening portion is covered from the outdoor side by the water-stopping member 20 and is not visible from the indoor side, thus improving the aesthetic appearance. Furthermore, when removing the sash upper frame 4 from the installation upper frame 13, there is no need to remove the wet seal, such as caulking, from the building structure side, as would be the case if a wet seal such as caulking were provided between the sash upper frame and the building structure side to stop water from entering the screw fastening area. This significantly contributes to simplifying the removal process.

[0030] Furthermore, in this embodiment, the water-stopping member 20 that seals the outdoor protruding piece 13d, the outdoor contact piece 4e, and the screw 18 fastening portion is a dry type formed from an elastic material such as fin-shaped rubber material. Therefore, even if the water-stopping member 20 remains attached to the installation upper frame 13 or the sash upper frame 4, the sash upper frame 4 can be attached to and removed from the installation upper frame 13 without any problems.

[0031] Furthermore, in this design, a water-stopping member 21 is provided between the indoor-side protruding piece 13b of the installation upper frame 13 and the indoor-side contact piece (indoor-side visible surface portion) 4b of the sash upper frame 4. This member is pressed against the indoor-side protruding piece 13b and the indoor-side contact piece 4b to stop water leakage. Thus, by assembling the sash upper frame 4 into the installation upper frame 13 from the outdoor direction and bringing the indoor-side contact piece 4b into contact with the indoor-side protruding piece 13b, water leakage between the indoor-side protruding piece 13b of the installation upper frame 13 and the indoor-side contact piece 4b of the sash upper frame 4 can be reliably stopped.

[0032] Furthermore, in this configuration, the installation lower frame 14 comprises an installation lower frame main body 14a on which the sash lower frame 5 is placed, and an indoor protruding piece 14b that protrudes upward from the indoor side of the installation lower frame main body 14a, while the sash lower frame 5 comprises an indoor contact piece (indoor visible surface portion) 5b that abuts against the indoor protruding piece 14b from the outdoor side when the sash lower frame 5 is assembled onto the installation lower frame 14 from the outdoor side. The installation lower frame 14 and the sash lower frame 5 are detachably fixed by fastening the indoor protruding piece 14b and the indoor contact piece 5b with screws 22. In this case, a water-stopping member 21 is provided between the indoor protruding piece 14b and the indoor contact piece 5b, which is pressed against the indoor contact piece 5b when it abuts against the indoor protruding piece 14b to stop water from entering. However, by assembling the sash lower frame 5 into the installation upper frame 14 from the outdoor side, the indoor side protruding piece 14b and the indoor side contact piece 5b that come into contact with each other are fastened with screws 22, thereby fixing the installation lower frame 5 to the sash lower frame 14 in a detachable manner. This contributes to reducing the number of parts, similar to the case where the sash upper frame 4 is fixed to the installation upper frame 13 as described above, and also makes it easy to attach and detach the sash lower frame 5 to the installation lower frame 14. Thus, it is possible to significantly improve work efficiency when removing the sash 3 from the installation frame 2 and reusing the sash 3 elsewhere, or when replacing the sash 3. Furthermore, a water-stopping member 21 is provided between the indoor-side protruding piece 14b of the installation lower frame 14 and the indoor-side contact piece (indoor-side visible surface portion) 5b of the sash lower frame 5, which is pressed against the indoor-side protruding piece 14b and the indoor-side contact piece 5b to stop water leakage. Therefore, as with the case of the sash upper frame 4 described above, by assembling the sash lower frame 5 into the installation lower frame 14 from the outdoor direction and bringing the indoor-side contact piece 5b into contact with the indoor-side protruding piece 14b, water leakage between these indoor-side protruding piece 14b and indoor-side contact piece 5b can be reliably stopped.

[0033] Furthermore, in this configuration, the installation vertical frame 15 comprises an installation vertical frame main body portion 15a located on the left and right outer sides of the sash vertical frame 6, and indoor and outdoor protruding pieces 15b and 15d that protrude toward the sash vertical frame 6 from the indoor and outdoor portions of the installation vertical frame main body portion 15a, respectively. On the other hand, the sash vertical frame 6 comprises an indoor contact piece (indoor visible surface portion) 6b and an outdoor contact piece 6e that come into contact with the indoor and outdoor protruding pieces 15b and 15d from the outdoor direction when the sash vertical frame 6 is assembled into the installation vertical frame 15 from the outdoor direction. Then, by fastening the indoor protruding piece 15b and the indoor contact piece 6b, and the outdoor protruding piece 15d and the outdoor contact piece 6e with screws 25 and 26, respectively, the installation vertical frame 15 and the sash vertical frame 6 are fixed together so that they can be detachably attached on both the indoor and outdoor sides. In this case, the screw 26 fastening portion between the outdoor protruding piece 15d and the outdoor contact piece 6e is located on the indoor side of the installation vertical frame body 15a and the outdoor end of the sash vertical frame 6, and the outdoor side of the screw 26 fastening portion is open 27, allowing the screw 26 fastening between the outdoor protruding piece 15d and the outdoor contact piece 6e to be performed from this opening 27, and a water-stopping member 20 is provided on the indoor side of the opening 27 to stop water from entering the screw 26 fastening portion. However, by assembling the sash vertical frame 6 into the installation vertical frame 15 from the outdoor side, the indoor side protruding piece 15b and the indoor side contact piece 6b, and the outdoor side protruding piece 15d and the outdoor side contact piece 6e are fastened together with screws 25 and 26, respectively, thereby detachably fixing the sash vertical frame 6 to the installation vertical frame 15. This contributes to reducing the number of parts, similar to the case where the sash upper frame 4 is fixed to the installation upper frame 13 as described above, and also allows for easy attachment and removal of the sash vertical frame 6 to the installation vertical frame 15. Thus, it is possible to significantly improve work efficiency when removing the sash 3 from the installation frame 2 and reusing the sash 3 elsewhere, or when replacing the sash 3. Furthermore, the screw 26 fastening portion between the outdoor protruding piece 15d of the installation vertical frame 15 and the outdoor contact piece 6e of the sash vertical frame 6 is located on the indoor side of the outdoor ends of the installation vertical frame 15 and the sash vertical frame 6, and the outdoor side of the screw 26 fastening portion is open 27. Therefore, the screw 26 fastening can be performed from the opening 27, and space can be secured on the indoor side of the opening 27 for installing a water-stopping member 20. As a result, water-stopping of the screw 26 fastening portion can be reliably achieved, similar to the screw 18 fastening portion between the outdoor protruding piece 13d of the installation upper frame 13 and the outdoor contact piece 4e of the sash upper frame 4, while also improving the aesthetic appearance and significantly simplifying the removal work of the sash vertical frame 6 from the installation vertical frame 15.

[0034] Furthermore, a water-stopping member 21 is provided between the indoor-side protruding piece 15b of the installation vertical frame 15 and the indoor-side contact piece (indoor-side visible surface portion) 6b of the sash vertical frame 6, which is pressed against the indoor-side protruding piece 15b and the indoor-side contact piece 6b to stop water leakage. Therefore, as with the sash upper frame 4 and sash lower frame 5 described above, by assembling the sash vertical frame 6 into the installation vertical frame 15 from the outdoor direction and bringing the indoor-side contact piece 5b into contact with the indoor-side protruding piece 15b, water leakage between these indoor-side protruding piece 15b and indoor-side contact piece 6b can be reliably stopped.

[0035] Furthermore, in this system, when assembling multiple sashes 3 adjacent to each other on the installation frame 2, the outdoor-facing portion of the adjacent sash vertical frame 6 (one-side sash vertical frame 6B) of one adjacent sash 3 is provided with an outdoor-side protruding piece 6i that protrudes toward the adjacent sash vertical frame 6 (the other-side sash vertical frame 6C) of the other sash 3, while the adjacent sash vertical frame 6 of the other sash 3 is provided with an outdoor-side contact piece 6e that abuts against the outdoor-side protruding piece 6i from the outdoor direction. The adjacent sash vertical frames 6 are detachably connected by fastening the outdoor protruding piece 6i and the outdoor contact piece 6e with screws 30. In this case, the screw 30 fastening portion between the outdoor protruding piece 6i and the outdoor contact piece 6e is located on the indoor side of the outdoor end of the adjacent sash vertical frame 6, and the outdoor side of the screw 30 fastening portion is open 31. The screw 30 fastening between the outdoor protruding piece 6i and the outdoor contact piece 6e can be performed from this opening 31, and a water-stopping member 20 is provided on the indoor side of the opening 31 to stop water from entering the screw 30 fastening portion. However, by fastening the outdoor protruding piece 6i and the outdoor inner contact piece 6e, which are assembled from the outdoor side and brought into contact with the adjacent sash vertical frame 6 of one adjacent sash 3 on the left and right, using screws 30, the adjacent sash vertical frames 6 of the left and right adjacent sashes 3 are detachably fixed to each other, thereby making it easy to connect the adjacent sash vertical frames 6 of the left and right adjacent sashes 3. As a result, even in a sash device 1 constructed by assembling multiple sashes 3 adjacent to each other on the left and right of an installation frame 2, the workability when removing the sashes 3 from the installation frame 2 and reusing them elsewhere, or when replacing the sashes 3, can be greatly improved. Furthermore, the screw 30 fastening portion between the outdoor protruding piece 6i and the outdoor contact piece 6e is located on the indoor side of the outdoor end of the sash vertical frame 6, and the outdoor side of the screw 30 fastening portion is open 31. Therefore, the screw 30 can be fastened from the opening 31, and space can be secured on the indoor side of the opening 31 for the installation of a water-stopping member 20. This ensures reliable water-stopping of the screw 30 fastening portion, similar to the screw 18 fastening portion between the outdoor protruding piece 13d of the installation upper frame 13 and the outdoor contact piece 4e of the sash upper frame 4, and also improves the aesthetic appearance.

[0036] Furthermore, the indoor portion of the adjacent sash vertical frame 6 (one-side sash vertical frame 6B) of one of the adjacent sashes 3 is provided with an indoor-side engaging groove (indoor-side engaging receiving portion) 6h that protrudes toward the adjacent sash vertical frame 6 (other-side sash vertical frame 6C) of the other sash 3, while the adjacent sash vertical frame 6 of the other sash 3 is provided with an engaging projection (indoor-side engaging portion) 6k that engages with the indoor-side engaging groove 6h from the outdoor direction. Between these indoor-side engaging grooves 6h and engaging projections 6k, a water-stopping member 32 is provided that is pressed and stops water when the engaging projections 6k are engaged with the indoor-side engaging grooves 6h. As a result, by assembling the other sash 3 into the one sash 3 from the outdoor direction and engaging the engaging projections 6k with the indoor-side engaging grooves 6h, water-stopping between these indoor-side engaging grooves 6h and engaging projections 6k can be reliably achieved.

[0037] Furthermore, in this design, when a pair of sashes 3 are assembled in a corner shape to the installation frame 2, the vertical frames 6 of the corner-side sashes 3 are detachably connected to each other via a corner mullion 9, while the upper and lower parts of the corner mullion 9 are detachably fixed to the upper installation frame 13 and lower installation frame 14 that constitute the installation frame 2. As a result, when a pair of sashes 3 are assembled in a corner shape to the installation frame 2, the corner mullion 9 that connects the vertical frames 6 of the corner-side sashes 3 can also be removed from the installation frame 2 and reused elsewhere.

[0038] Furthermore, the corner mullion 9 is provided with a pair of vertical mullion frames 33A and 33B to which the corner-side sash vertical frames 6 of the pair of sashes 3 are detachably connected. The outdoor-side portions of the vertical mullion frames 33A and 33B are provided with outdoor-side protruding pieces 33f that project toward the corner-side sash vertical frames 6, while the corner-side sash vertical frames 6 are provided with outdoor-side contact pieces 6e that abut against the outdoor-side protruding pieces 33f from the outdoor direction. Then, by fastening the outdoor protruding piece 33f and the outdoor contact piece 6e with screws 40, the mullion vertical frames 33A and 33B and the corner sash vertical frame 6 are detachably connected. In this case, the screw 40 fastening portion between the outdoor protruding piece 33f and the outdoor contact piece 6e is located on the indoor side of the outdoor ends of the mullion vertical frames 33A and 33B and the corner sash vertical frame 6, and the outdoor side of the screw 40 fastening portion is open 41, allowing the screw 40 fastening between the outdoor protruding piece 33f and the outdoor contact piece 6e to be performed from this opening 41, and a water-stopping member 20 is provided on the indoor side of the opening 41 to stop water from entering the screw 40 fastening portion. However, by fastening the outdoor protruding piece 33f and the outdoor inner contact piece 6e, which are brought into contact with the corner sash 3's corner-shaped sash vertical frame 6 by assembling it from the outdoor side and bringing them into contact with the mullion vertical frames 33A and 33B that constitute the corner mullion 9, the mullion vertical frames 33A and 33B and the corner sash vertical frame 6 are detachably fixed, thereby making it easy to connect the mullion vertical frames 33A and 33B and the corner sash vertical frame 6. As a result, even in a sash device 1 in which a pair of sashes 3 are assembled in a corner shape on the installation frame 2, the workability when removing the sash 3 and corner mullion 9 and reusing them elsewhere, or when replacing the sash 3 or corner mullion 9, can be greatly improved. Furthermore, the screw 40 fastening portion between the outdoor protruding piece 33f and the outdoor contact piece 6e is located on the indoor side of the corner mullions 33A and 33B and the outdoor end of the corner sash vertical frame 6, and the outdoor side of the screw 40 fastening portion is open 41. Therefore, the screw 40 can be fastened from the opening 41, and space can be secured on the indoor side of the opening 41 for installing the water-stopping member 20. This ensures reliable water-stopping of the screw 40 fastening portion, similar to the screw 18 fastening portion between the outdoor protruding piece 13d of the installation upper frame 13 and the outdoor contact piece 4e of the sash upper frame 4, and also improves the aesthetic appearance. [Industrial applicability]

[0039] This invention can be used when you want to reuse frame units such as window sashes. [Explanation of symbols]

[0040] 2 Installation frame 3 sash 4. Upper frame of the window sash 4b Indoor side finding surface part (indoor side contact piece) 4e Outdoor side contact piece 5. Window frame bottom 5b Indoor side finding surface part (indoor side contact piece) 6. Window frame (vertical frame) 6b Indoor side finding surface part (indoor side contact piece) 6e Outdoor side contact piece 6i Outdoor side protruding piece 6h Indoor side engagement groove 6k engaging protrusion 13 Installation upper frame 13a Installation upper frame main body 13b Indoor side protruding piece 13d Outdoor side protruding piece 14 Installation bottom frame 14a Installation lower frame main body 14b Indoor side protruding piece 15 Installation vertical frame 15a Installation vertical frame main body 15b Indoor side protruding piece 15d Outdoor side protruding piece 17, 18, 22, 30, 25, 26, 30, 40, 43 screws 19, 27, 31, 41, 44 opening 20 Water-stopping member 21 Water-stopping member 32 Water-stopping member 33A One-sided vertical frame 33B Other side vertical frame 33f Outdoor side protruding piece 33h Indoor side engagement groove

Claims

1. When attaching a frame unit, in which an upper frame, lower frame, and left and right vertical frames are formed as a frame, to an installation frame fixed to the inner circumference of the opening in the building structure, The aforementioned mounting frame includes an mounting upper frame to which the frame unit upper frame is assembled, The installation upper frame comprises an installation upper frame main body located above the frame unit upper frame, and indoor and outdoor protruding pieces that protrude downward from the indoor and outdoor portions of the installation upper frame main body, The upper frame of the frame unit is equipped with indoor and outdoor contact pieces that abut against the indoor and outdoor protruding pieces, respectively, when the upper frame of the frame unit is assembled into the installation upper frame from the outdoor direction. These indoor protruding pieces and indoor contact pieces, and outdoor protruding pieces and outdoor contact pieces, are fastened together with fastening members to create a configuration that allows the upper frame of the installation unit and the upper frame of the frame unit to be detachably fixed on both the indoor and outdoor sides. The fastening portion between the outdoor protruding piece and the outdoor contact piece is positioned on the indoor side of the outdoor end of the upper frame body and the upper frame unit, and the outdoor side of the fastening portion is open, allowing the outdoor protruding piece and the outdoor contact piece to be fastened through this opening. A water-sealing member is installed on the indoor side of the opening to seal the fastening, and further, The aforementioned mounting frame includes a mounting vertical frame to which either the left or right vertical frame of the frame unit is assembled. The installation vertical frame comprises an installation vertical frame main body located on the left and right outer sides of the frame unit vertical frame, and indoor and outdoor protruding pieces that project toward the frame unit vertical frame from the indoor and outdoor portions of the installation vertical frame main body. The frame unit vertical frame is equipped with indoor and outdoor contact pieces that abut against the indoor and outdoor protruding pieces from the outdoor direction, respectively, when the frame unit vertical frame is assembled into the installation vertical frame from the outdoor direction. These indoor protruding pieces and indoor contact pieces, and outdoor protruding pieces and outdoor contact pieces, are fastened together with fastening members to create a configuration that allows the installation vertical frame and the frame unit vertical frame to be detachably fixed on both the indoor and outdoor sides, The fastening portion between the outdoor protruding piece and the outdoor contact piece is positioned on the indoor side of the outdoor end of the installation vertical frame body and the frame unit vertical frame, and the outdoor side of the fastening portion is open, so that the outdoor protruding piece and the outdoor contact piece can be fastened through the opening. A frame unit assembly structure characterized by having a water-sealing member installed on the indoor side of the opening to stop water from entering the fastening portion.

2. The assembly structure for a frame unit according to claim 1, characterized in that a water-stopping member is provided between the indoor-side protruding piece of the installation upper frame and the indoor-side contact piece of the frame unit upper frame, which is pressed against the indoor-side protruding piece and the indoor-side contact piece to stop water from leaking.

3. In claim 1, the installation frame comprises an installation lower frame to which the lower frame of the frame unit is assembled, The installation lower frame comprises an installation lower frame main body on which the frame unit lower frame is placed, and an indoor protruding piece that protrudes upward from the indoor side portion of the installation lower frame main body, The lower frame of the frame unit is equipped with an indoor contact piece that abuts against the indoor protruding piece from the outdoor direction when the lower frame of the frame unit is assembled into the installation lower frame from the outdoor direction. The lower frame and the lower frame unit are detachably fixed by fastening these indoor-side protruding pieces and indoor-side contact pieces with fastening members, A frame unit assembly structure characterized by having a water-stopping member provided between an indoor-side protruding piece and an indoor-side contact piece, which is pressed against the indoor-side protruding piece and the indoor-side contact piece to stop water from leaking.

4. The assembly structure for a frame unit according to claim 1, characterized in that a water-stopping member is provided between the indoor-side protruding piece of the installation vertical frame and the indoor-side contact piece of the frame unit vertical frame, which is pressed against the indoor-side protruding piece and the indoor-side contact piece to stop water from leaking.

5. When attaching a frame unit, in which an upper frame, a lower frame, and left and right vertical frames are formed as a frame, to an installation frame fixed to the inner circumference of an opening in the building structure, The aforementioned mounting frame includes an mounting upper frame to which the frame unit upper frame is assembled, The installation upper frame comprises an installation upper frame main body located above the frame unit upper frame, and indoor and outdoor protruding pieces that protrude downward from the indoor and outdoor portions of the installation upper frame main body, The upper frame of the frame unit is equipped with indoor and outdoor contact pieces that abut against the indoor and outdoor protruding pieces, respectively, when the upper frame of the frame unit is assembled into the installation upper frame from the outdoor direction. These indoor protruding pieces and indoor contact pieces, and outdoor protruding pieces and outdoor contact pieces, are fastened together with fastening members to create a configuration that allows the upper frame of the installation unit and the upper frame of the frame unit to be detachably fixed on both the indoor and outdoor sides. The fastening portion between the outdoor protruding piece and the outdoor contact piece is positioned on the indoor side of the outdoor end of the upper frame body and the upper frame unit, and the outdoor side of the fastening portion is open, allowing the outdoor protruding piece and the outdoor contact piece to be fastened through this opening. A water-sealing member is installed on the indoor side of the opening to seal the fastening, and further, When assembling multiple frame units adjacent to each other on the installation frame, an outdoor-side protruding piece is provided on the outdoor-side portion of the vertical frame of one adjacent frame unit, projecting toward the vertical frame of the other adjacent frame unit. An outdoor contact piece is provided on the vertical frame of the adjacent frame unit of the other frame unit, which contacts the outdoor side protruding piece from the outdoor direction. These outdoor protruding pieces and outdoor contact pieces are fastened together with fastening members to create a configuration that allows adjacent frame units to be detachably connected to each other. The fastening portion between the outdoor protruding piece and the outdoor contact piece is positioned on the indoor side of the outdoor end of the adjacent frame unit's vertical frame, and the outdoor side of the fastening portion is open, allowing the outdoor protruding piece and the outdoor contact piece to be fastened through this opening. A frame unit assembly structure characterized by having a water-sealing member installed on the indoor side of the opening to stop water from entering the fastening portion.

6. The frame unit assembly structure according to claim 5, characterized in that an indoor-side engaging receiving portion is provided on the indoor-side portion of the adjacent frame unit vertical frame of one adjacent frame unit, projecting toward the adjacent frame unit vertical frame of the other frame unit, while an indoor-side engaging portion is provided on the adjacent frame unit vertical frame of the other frame unit, engaging with the indoor-side engaging receiving portion from the outdoor direction, and a water-stopping member is provided between these indoor-side engaging receiving portions and the indoor-side engaging portion, which is pressed and stops water when the indoor-side engaging portion engages with the indoor-side engaging receiving portion.

7. When attaching a frame unit, in which an upper frame, a lower frame, and left and right vertical frames are formed as a frame, to an installation frame fixed to the inner circumference of an opening in the building structure, The aforementioned mounting frame includes an mounting upper frame to which the frame unit upper frame is assembled, The installation upper frame comprises an installation upper frame main body located above the frame unit upper frame, and indoor and outdoor protruding pieces that protrude downward from the indoor and outdoor portions of the installation upper frame main body, The upper frame of the frame unit is equipped with indoor and outdoor contact pieces that abut against the indoor and outdoor protruding pieces, respectively, when the upper frame of the frame unit is assembled into the installation upper frame from the outdoor direction. These indoor protruding pieces and indoor contact pieces, and outdoor protruding pieces and outdoor contact pieces, are fastened together with fastening members to create a configuration that allows the upper frame of the installation unit and the upper frame of the frame unit to be detachably fixed on both the indoor and outdoor sides. The fastening portion between the outdoor protruding piece and the outdoor contact piece is positioned on the indoor side of the outdoor end of the upper frame body and the upper frame unit, and the outdoor side of the fastening portion is open, allowing the outdoor protruding piece and the outdoor contact piece to be fastened through this opening. A water-sealing member is installed on the indoor side of the opening to seal the fastening, and further, When assembling a pair of frame units in a corner shape onto the installation frame, The vertical frames of the corner sections of a pair of frame units are detachably connected via corner mullions, The frame unit assembly structure is characterized by comprising an upper mounting frame and a lower mounting frame to which a pair of frame units are assembled, and the upper and lower parts of the corner mullions are detachably fixed to these upper and lower mounting frames.

8. The frame unit assembly structure according to claim 7 is characterized in that the corner mullion comprises a pair of corner mullion vertical frames to which the corner side frame unit vertical frames of the pair of frame units are detachably connected, the outdoor side portion of the corner mullion vertical frame is provided with an outdoor side projection piece that projects toward the corner side frame unit vertical frame, and the corner side frame unit vertical frame is provided with an outdoor side contact piece that abuts against the outdoor side projection piece from the outdoor direction, and the corner mullion vertical frame and the corner side frame unit vertical frame are detachably connected by fastening these outdoor side projection piece and outdoor side contact piece with a fastening member, the fastening portion between the outdoor side projection piece and the outdoor side contact piece is located on the indoor side of the outdoor side of the corner mullion vertical frame and the corner side frame unit vertical frame, the outdoor side of the fastening portion is open, and the fastening portion between the outdoor side projection piece and the outdoor side contact piece can be fastened from the opening, and a water-stopping member is provided on the indoor side of the opening to stop water from entering the fastening portion.

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