Curtain Wall Unit

Abstract

To prevent vertical frames from being deformed so as to open each other without complicating installation work of a curtain wall.SOLUTION: There is provided a curtain wall unit CU provided with an opening stopper component 40 between two adjacent vertical frames 11 of a curtain wall C arranged side by side. The opening stopper component 40 has an outdoor member 41A and an indoor member 41B which are separate members. The outdoor member 41A can be displaced to the first position and the second position by moving in the prospective direction with respect to the vertical frame 11, and at least engages with the two adjacent vertical frames 11 when arranged at the first position so as to prevent the two vertical frames 11 from moving away from each other. The indoor member 41B engages with the outdoor member 41A arranged at the first position and the vertical frame 11 so as to prevent the movement of the outdoor member 41A to the second position.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a curtain wall unit. [Background technology]

[0002] In a curtain wall unit that constitutes the exterior wall of a building or other structure, airtight materials such as wind barriers are attached to the opposing parts of the vertical frames that constitute the curtain wall, and these airtight materials are installed in a state of being pressed against each other. In such a curtain wall unit, although it is possible to ensure airtightness between the vertical frames, there is a concern that the vertical frames may be deformed to open toward each other due to the repulsive force of the airtight materials. For this reason, in the past, engaging pieces were provided along the projection direction on the inner ribs of adjacent vertical frames, and opening prevention parts were attached across these engaging pieces. The opening prevention parts have, for example, a flat base plate portion and engaging plate portions that extend in the same direction from both side edges of the base plate portion, and are attached between the vertical frames with the engaging pieces abutting against the opposing inner surfaces of the engaging plate portions. In a curtain wall unit equipped with opening prevention parts, the engaging pieces abut against the engaging plate portions, thereby preventing the vertical frames from moving away from each other, and eliminating the risk of the above-mentioned deformation (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-211309 A (Fig. 3) Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the tips of the engagement pieces are bent in a direction away from each other, the tips of the engagement plates provided on the opening prevention parts are bent in a direction approaching each other, and the inner rib of the vertical frame, the bent part of the engagement plate, the bent part of the engagement piece, and the base part are arranged in layers and are in contact with each other without any gaps. Therefore, when attaching the opening prevention parts between the vertical frames, the opening prevention parts must be moved along the length of the vertical frames in a state where the inner rib of the vertical frame and the bent part of the engagement plate, the bent part of the engagement plate and the bent part of the engagement piece, and the bent part of the engagement piece and the base part are in contact with each other, which is not necessarily preferable in terms of workability. Of course, if the engagement pieces and the opening prevention parts are configured to ensure a gap between them, it is possible to solve the above-mentioned problem, but there is a concern that new problems such as the opening prevention parts being loose after being attached to the vertical frames may occur. Furthermore, when attaching anti-opening parts to multiple positions on the vertical frame, it is difficult to pre-install positioning members such as positioning screws in multiple positions prior to attaching the anti-opening parts, which may make the work of installing the curtain wall even more complicated.

[0005] In view of the above-mentioned situation, the present invention aims to provide a curtain wall unit that can prevent the vertical frames from deforming and opening up from each other without complicating the installation work of the curtain wall. [Means for solving the problem]

[0006] In order to achieve the above object, the curtain wall unit of the present invention is a curtain wall unit in which an opening prevention part is provided between two adjacent vertical frames of a curtain wall arranged side by side on the left and right, the opening prevention part has a first member and a second member which are separate from each other, the first member is displaceable to a first position and a second position by moving in a prospective direction relative to the vertical frames, and when placed at least in the first position, engages with the two adjacent vertical frames to prevent the two vertical frames from moving in a direction away from each other, and the second member engages with the first member placed at the first position and the vertical frame to prevent the first member from moving to the second position. When the first member and the second member are arranged side by side in a forward direction with the first member disposed at the first position, they abut against opposing forward surfaces of the vertical frame, thereby preventing the first member from moving to the second position, and when the second member is arranged side by side in a forward direction with respect to the first member, they engage with the two adjacent vertical frames, thereby preventing the two vertical frames from moving in a direction away from each other. It is characterized by: Effect of the Invention

[0007] According to the present invention, the opening prevention part is composed of a first member and a second member, and the first member is placed at the first position to prevent the vertical frames from moving away from each other, and then the second member is engaged with the first member and the vertical frame to hold the first member at the first position. Therefore, the first member and the second member can be moved to a desired position while maintaining an appropriate gap between the vertical frame and the first member, and the workability when installing the first member and the second member can be improved. Moreover, since the second member is placed so as to engage with the first member and the vertical frame, there is no concern that the first member and the second member will rattle after installation. Furthermore, since the first member is placed at the desired position while placed at the second position, and then the first member is placed at the first position and then the positioning with the vertical frame is performed, it is possible to place the positioning member on the vertical frame in advance at a place with sufficient facilities such as a factory, and it is possible to facilitate the work at the site where the curtain wall is installed. [Brief description of the drawings]

[0008] [Figure 1] This is a diagram showing the curtain walls that make up the curtain wall unit, which is an embodiment of the present invention, arranged side by side vertically and horizontally, as viewed from the outside of the room. [Diagram 2] FIG. 2 is a vertical cross-sectional view of a main portion of the curtain wall unit shown in FIG. 1. [Diagram 3] FIG. 2 is a cross-sectional view of a main portion of the curtain wall unit shown in FIG. 1. [Figure 4] FIG. 2 is a diagram showing the curtain walls that make up the curtain wall unit shown in FIG. 1 arranged side by side from the indoor space side. [Diagram 5] 2 is an enlarged cross-sectional view showing the vertical frame of the curtain wall shown in FIG. 1. [Figure 6] FIG. 2 is an exploded perspective view of a stopper component used in the curtain wall unit shown in FIG. 1. [Figure 7] This shows the procedure for installing anti-opening parts between the vertical frames of adjacent curtain walls in the curtain wall unit shown in Figure 1, where (a) is a cross-sectional view of the essential parts when the first member is placed in the second position, (b) is a cross-sectional view of the essential parts when the first member is placed in the first position, and (c) is a cross-sectional view of the essential parts when the second member is arranged alongside the first member in the prospective direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A preferred embodiment of the curtain wall unit according to the present invention will be described in detail below with reference to the accompanying drawings. For convenience, the terms "see-through direction" and "finding direction" will be used below. The "see-through direction" is the direction along the depth of the curtain wall unit, as shown by arrow A in the drawing. A surface along the see-through direction may be called a "see-through surface." The "finding direction" is the direction along the top and bottom perpendicular to the see-through direction in the case of an upper frame or lower frame that extends along the horizontal direction. In the case of an upper frame or lower frame that extends along the vertical direction, the direction along the horizontal perpendicular to the see-through direction is called the "finding direction." A surface along the see-through direction may be called a "finding surface."

[0010] 1 to 4 show a building to which a curtain wall unit according to an embodiment of the present invention is applied. In the building exemplified here, a ceiling board material P is provided between an upper floor slab S1 and a lower floor slab S2, thereby forming an indoor space below the ceiling board material P and forming an attic space above the ceiling board material P. A curtain wall unit CU is formed by arranging a plurality of curtain walls C side by side vertically and horizontally on the outdoor side portions of the upper and lower floor slabs S1 and S2. The curtain walls C are prefabricated in a well-equipped manufacturing factory and have the same configuration as each other. In this embodiment, each curtain wall C is formed by disposing a surface material 20 inside a frame body 10.

[0011] The frame body 10 is formed into a vertically long rectangular shape by providing an upper frame 12 and a lower frame 13 between the left and right vertical frames 11, and further, a transom 14 is provided between the middle parts of the left and right vertical frames 11 in a portion corresponding to the ceiling panel material P so as to be parallel to the upper frame 12 and the lower frame 13. These vertical frames 11, upper frame 12, lower frame 13, and transom 14 are each extruded shapes formed from metal such as aluminum alloy, and are configured so that the entire length along the longitudinal direction has a substantially uniform cross-sectional shape. The face material 20 is configured separately above and below, with the transom 14 as a boundary. In the illustrated example, a single-layer glass plate is disposed as the upper face material 20 via a batten 15 in the portion surrounded by the left and right vertical frames 11, the upper frame 12, and the transom 14, and a double-layer glass is disposed as the lower face material 20 via a batten 15 in the portion surrounded by the left and right vertical frames 11, the lower frame 13, and the transom 14.

[0012] As is clear from the figure, a primary sealant 31 and a secondary sealant 32 are attached to the left and right vertical frames 11, the upper frame 12, and the lower frame 13 that form the outer hull of the curtain wall C at the same positions on the outer periphery in the projection direction. These sealants 31, 32 are provided so as to be continuous with each other on the outer periphery of the curtain wall C, and come into contact with each other when the curtain walls C are installed side by side up, down, left, and right at the construction site, to ensure airtightness and watertightness inside and outside the room. In particular, the secondary sealant 32 is a so-called wind barrier, and is provided so as to be elastically deformed by being pressed against each other when the curtain walls C are installed side by side.

[0013] Here, in the above-mentioned curtain wall C, when arranged side by side vertically, horizontally, the repulsive force of the secondary seal material 32 acts on the vertical frame 11, the upper frame 12, and the lower frame 13. For the upper frame 12 and the lower frame 13, a hollow portion can be formed on the inner periphery side of the portion where the secondary seal material 32 is provided, and there is no risk of deformation due to the repulsive force of the secondary seal material 32. On the other hand, for the left and right vertical frames 11, there is a demand to secure a large glass area in the indoor space, and in many cases, it is not possible to set the dimension in the viewing direction to be large. For this reason, there is a concern that the vertical frame 11 will be deformed due to the repulsive force of the secondary seal material 32. Therefore, in the curtain wall unit CU of this embodiment, the opening stopper parts 40 are attached to the vertical frames 11 of the curtain walls C adjacent to each other on the left and right to prevent the above-mentioned problem from occurring. Below, the configuration of the vertical frame 11 and the opening stopper parts 40 will be described in detail, and the characteristic parts of the present invention will also be described.

[0014] The vertical frames 11 of the curtain wall C are configured to have the same cross-sectional shape on the left and right. In this embodiment, as shown in Fig. 5, the vertical frame 11 is configured by providing, from the outside of the room, a batten mounting portion 11b, a primary seal receiving portion 11c, a secondary seal receiving portion 11d, and an inner spotting plate portion 11e on a flat vertical frame main body portion 11a extending along the projection direction. These batten mounting portion 11b, primary seal receiving portion 11c, secondary seal receiving portion 11d, and inner spotting plate portion 11e are configured so that there is a gap between them even when the curtain walls C are installed side by side on the left and right.

[0015] The batten attachment portion 11b is bent at a right angle from the edge located on the outside of the vertical frame body portion 11a toward the outer periphery. A batten 15 is attached to the extended edge of the batten attachment portion 11b. The primary seal receiving portion 11c is formed of two plates extending from a portion located on the inside of the batten attachment portion 11b toward the outer periphery on the projection surface 11a1 on the outer periphery side of the vertical frame body portion 11a so as to be almost parallel to each other. A primary seal material 31 is attached to the primary seal receiving portion 11c so as to protrude toward the outer periphery. The primary seal material 31 has two contact pieces 31a protruding toward the outer periphery. This primary seal material 31 ensures watertightness and airtightness between the two primary seal materials 31 of the adjacent curtain wall C by bringing the two contact pieces 31a into contact with the primary seal material 31 of the adjacent curtain wall C in the projection direction.

[0016] The secondary seal receiving portion 11d is formed of two plates extending from a portion of the projected surface 11a1 on the outer periphery side of the vertical frame main body portion 11a that is closer to the room than the primary seal receiving portion 11c toward the periphery so as to be substantially parallel to each other. A secondary seal material 32 is attached to the secondary seal receiving portion 11d so as to protrude toward the outer periphery. The secondary seal material 32 has a hollow contact portion 32a that protrudes toward the periphery. The secondary seal material 32 is maintained in an elastically deformed state by pressing the contact portion 32a against the secondary seal material 32 of the adjacent curtain wall C, thereby ensuring watertightness and airtightness between them.

[0017] The inner sight plate 11e is bent at a right angle from the edge located on the indoor side of the vertical frame main body 11a toward the outer periphery. A sight plate 11f is provided between the extended edge of the inner sight plate 11e and the extended edge of the part located on the indoor side of the secondary seal receiving part 11d. The sight plate 11f extends along the sight direction and has an outer engagement piece 11g and an inner engagement piece 11h on the sight surface on the outer periphery side. The outer engagement piece 11g has an outer abutment rib part (abutment rib part) 11g1 that extends from the part of the sight plate 11f that is the outdoor side toward the outer periphery in an almost perpendicular direction, and an outer engagement rib part (engagement rib part) 11g2 that is bent at a right angle from the extended edge of the outer abutment rib part 11g1 toward the indoor side. The inner engagement piece 11h has an inner abutment rib portion (second abutment rib portion) 11h1 that extends from a portion of the projection plate portion 11f that is an extension of the inner sight plate portion 11e toward the outer periphery in a direction substantially perpendicular to the inner engagement rib portion (second engagement rib portion) 11h2 that is bent from the extended edge of the inner abutment rib portion 11h1 toward the outside of the room at a substantially right angle. The outer engagement piece 11g and the inner engagement piece 11h have substantially the same protruding dimensions of the outer engagement rib portion 11g2 and the inner engagement rib portion 11h2, and the outer abutment rib portion 11g1 and the inner abutment rib portion 11h1 face each other.

[0018] 2 and 4, an insertion notch 16 is provided in the inner sight plate portion 11e at a position above the transom 14, that is, at a position that is not exposed to the indoor space because it is covered by the ceiling plate material P. The insertion notch 16 is a notch that opens to the outer periphery and is formed by cutting away the inner engagement piece 11h that protrudes from the sight plate portion 11f to the outer periphery, and is configured to have a dimension larger than the dimension along the longitudinal direction of the opening stopper part 40 described later.

[0019] The opening prevention component 40 provided between the vertical frames 11 described above is configured to have an outdoor side member (first member) 41A and an indoor side member (second member) 41B which are separate from each other. The outdoor side member 41A and the indoor side member 41B are formed from a metal, for example, an aluminum alloy. In this embodiment, as shown in Fig. 6, the outdoor side member 41A and the indoor side member 41B are formed integrally with a rectangular flat plate-like base portion 41a and two engagement plate portions 41b extending from both side edges of the base portion 41a in the same direction at approximately right angles to each other, and have the same shape.

[0020] The dimension along the short side of the base plate portion 41a is formed so as to almost match the mutual spacing of the projection plate portions 11f provided on the vertical frame 11 when the curtain walls C are arranged side by side on the left and right. The dimension along the long side of the base plate portion 41a is set so that multiple pieces can be arranged along the long side of the vertical frame 11. Two screw holes 41c are provided along the long side of the base plate portion 41a of the outdoor side member 41A, and two screw insertion holes 41d are provided along the long side of the base plate portion 41a of the indoor side member 41B. These screw holes 41c and screw insertion holes 41d are formed so that their axes coincide with each other when the base plate portion 41a of the outdoor side member 41A and the base plate portion 41a of the indoor side member 41B are overlapped. Therefore, by screwing the connecting screw 42 into the screw hole 41c through the screw insertion hole 41d, the outdoor member 41A and the indoor member 41B can be connected and integrated with each other with the base plate portions 41a abutting each other. The plate thickness of the engagement plate portion 41b is set to a dimension that is approximately equal to the distance between the projection plate portion 11f and the outer engagement rib portion 11g2. The distance from the surface of the base plate portion 41a to the tip surface of the engagement plate portion 41b is set to a dimension that is 1 / 2 or less of the mutual distance between the outer abutment rib portion 11g1 and the inner abutment rib portion 11h1.

[0021] 7 shows the procedure for attaching the stopper parts 40 between the vertical frames 11 of adjacent curtain walls C. Below, the procedure for attaching the stopper parts 40 to the curtain wall C will be described with reference to this figure as appropriate.

[0022] First, when the opening stopper part 40 is to be attached, the outdoor member 41A and the indoor member 41B are prepared in a separated state. In the vertical frame 11 of the curtain wall C, a positioning screw 43 is screwed into at least one of the projection plate parts 11f. The positioning screw 43 determines the mounting position of the outdoor member 41A in the longitudinal direction of the vertical frame 11 by abutting against the lower surface of the base plate part 41a. When multiple opening stopper parts 40 are to be attached to the vertical frame 11, the positioning screw 43 is screwed into the vertical frame 11 in the number of the opening stopper parts 40 (four places in the example of FIG. 2). The timing for screwing the positioning screw 43 may be when the curtain wall C is constructed in the manufacturing factory. In the illustrated example, the multiple positioning screws 43 are screwed into the outer periphery of the projection plate part 11f so that the head 43a of the positioning screw 43 is positioned only on the outdoor side from the intermediate position between the outer abutment rib part 11g1 and the inner abutment rib part 11h1. At this time, it is preferable to set the dimensions of the head 43a of the positioning screw 43 in advance so that a gap is secured between the head 43a of the positioning screw 43 and the inner engagement rib portion 11h2 that is greater than the distance from the surface of the base plate portion 41a to the tip surface of the engagement plate portion 41b.

[0023] After the curtain walls C are installed side by side on the floor slab S1, the exterior member 41A of the stopper part 40 is placed between the adjacent vertical frames 11. Here, a gap smaller than the width of the exterior member 41A and the interior member 41B is secured between the adjacent vertical frames 11. However, as described above, the vertical frames 11 have an insertion notch 16 in a portion above the lattice 14. Therefore, as shown in FIG. 7(a), two insertion notches 16 are disposed opposite each other between the adjacent vertical frames 11, and before the ceiling panel material P is attached, the exterior member 41A and the interior member 41B can be inserted between the vertical frames 11 through the insertion notches 16. Moreover, a gap larger than the distance from the surface of the base plate portion 41a to the tip surface of the engagement plate portion 41b is secured between the head 43a of the positioning screw 43 and the inner engagement rib portion 11h2. For this reason, if the outdoor member 41A is disposed at a position (second position) offset toward the indoor side so that the base plate portion 41a abuts against the inner engagement rib portion 11h2, it becomes possible to move the outdoor member 41A to any position along the longitudinal direction of the vertical frame 11 without interfering with the head portion 43a of the positioning screw 43 previously screwed in. Moreover, when the outdoor member 41A is moved, the engagement plate portion 41b is not inserted between the outer engagement rib portion 11g2 and the projection plate portion 11f, so there is no risk of the vertical frame 11 and the outdoor member 41A rubbing against each other and causing resistance during movement, which is advantageous in terms of workability.

[0024] After the outdoor member 41A has moved to the desired position, as shown in Fig. 7(b), the outdoor member 41A is moved to the outdoor side relative to the vertical frame 11, and the lower end of the engagement plate portion 41b is brought into contact with the head portion 43a of the positioning screw 43, thereby positioning the outdoor member 41A in the longitudinal direction of the vertical frame 11. At this time, the engagement plate portion 41b of the outdoor member 41A is inserted between the projection plate portion 11f and the outer engagement rib portion 11g2, and the mutually opposing inner surfaces of the engagement plate portion 41b come into contact with or face closely to the outer engagement rib portion 11g2 (first position).

[0025] Next, from this state, the indoor member 41B is inserted between the vertical frames 11 through the insertion notches 16, and moved along the longitudinal direction of the vertical frames 11 to a position where the base plate portions 41a face each other. At this time, the engagement plate portion (second engagement plate portion) 41b of the indoor member 41B does not necessarily need to be moved while inserted between the inner engagement rib portion 11h2 and the projection plate portion 11f. As shown in FIG. 7(c), in a state where the base plate portion 41a of the outdoor member 41A and the base plate portion 41a of the indoor member 41B face each other and abut against each other, the engagement plate portion 41b of the indoor member 41B is inserted between the inner engagement rib portion 11h2 and the projection plate portion 11f, and further, the engagement plate portion 41b of the outdoor member 41A abuts against the outer abutment rib portion 11g1, and the engagement plate portion 41b of the indoor member 41B abuts against the inner abutment rib portion 11h1. Therefore, if the connecting screw 42 is screwed into the screw hole 41c through the screw insertion hole 41d from this state, the above-mentioned state is maintained. That is, the exterior member 41A and the interior member 41B of the opening stopper part 40 are prevented from moving in the forward direction relative to the vertical frame 11, and the inner surfaces of the respective engagement plate portions 41b come into contact with the outer engagement rib portion 11g2 and the inner engagement rib portion 11h2.

[0026] Thereafter, by repeating the above-mentioned work, it becomes possible to attach the stopper parts 40 to multiple locations between adjacent vertical frames 11. According to the curtain wall unit CU in which the stopper parts 40 are attached between adjacent vertical frames 11 as described above, even if the repulsive force of the secondary sealing material 32 acts on the vertical frames 11, the stopper parts 40 prevent the vertical frames 11 from moving in directions away from each other, eliminating the risk of causing deformation of the vertical frames 11.

[0027] In the above-described embodiment, a primary sealant 31 and a secondary sealant 32 are provided between adjacent curtain walls, but the number and types of sealants are not limited to those in the example.

[0028] In the above-described embodiment, the opening stopper part 40 is exemplified in which the indoor side member 41B prevents the outdoor side member 41A from moving in the projection direction when the outdoor side member 41A, which is the first member, and the indoor side member 41B, which is the second member, abut against the facing surfaces (the outer abutment rib portion 11g1 and the inner abutment rib portion 11h1) of the outdoor side member 41B, which is the second member, are abutted against each other. However, the present invention is not necessarily limited to this. For example, it is also possible to configure the indoor side member 41B so that the outdoor side member 41A is sandwiched between the outer engagement piece 11g of the vertical frame 11. In addition, in the above-described embodiment, when the second member prevents the first member from moving in the projection direction by abutting the first member and the second member against the facing surfaces of the first member and the second member, the outdoor side member 41A and the indoor side member 41B are configured to have the same shape, but they do not necessarily have to have the same shape. Also, the indoor side member 41B is provided so as to be movable in the front direction relative to the vertical frames 11, but the movement of the indoor side member 41B in the front direction may be restricted so long as it is movable along the longitudinal direction relative to the vertical frames 11. Furthermore, the outdoor side member 41A may be configured so that the movement of two adjacent vertical frames 11 in directions away from each other can be restricted even when the outdoor side member 41A is disposed in the second position.

[0029] As described above, the curtain wall unit of the present invention is a curtain wall unit in which an anti-opening part is provided between two adjacent vertical frames of a curtain wall arranged side by side on the left and right, and the anti-opening part has a first member and a second member which are separate from each other, and the first member is displaceable to a first position and a second position by moving in a projecting direction relative to the vertical frames, and when positioned at least at the first position, engages with the two adjacent vertical frames to prevent the two vertical frames from moving in a direction away from each other, and the second member prevents the first member from moving to the second position by engaging with the first member positioned at the first position and the vertical frame. According to this invention, the opening stopper part is composed of a first member and a second member, and the first member is placed at the first position to prevent the vertical frames from moving away from each other, and then the second member is engaged with the first member and the vertical frame to hold the first member at the first position. Therefore, the first member and the second member can be moved to a desired position while an appropriate gap is secured between the vertical frame and the first member, and the workability when attaching the first member and the second member can be improved. Moreover, since the second member is placed so as to engage with the first member and the vertical frame, there is no concern that the first member and the second member will rattle after attachment. Furthermore, since the first member is placed at the desired position while placed at the second position, and then the first member is positioned with respect to the vertical frame when placed at the first position, it is possible to place the positioning member on the vertical frame in advance at a place with sufficient equipment, such as a factory, and it is possible to facilitate the work at the site where the curtain wall is installed. The first member may be configured to be able to prevent the vertical frames from moving away from each other even at the first position. Furthermore, the second member may be movable in the front direction relative to the vertical frame, or may be in a state in which its movement is restricted.

[0030] The present invention is also characterized in that, in the above-mentioned curtain wall unit, when the first member and the second member are arranged side by side in the forward direction with the first member disposed at the first position, they abut against opposing forward facing surfaces of the vertical frames, thereby preventing movement of the first member to the second position. According to this invention, by arranging the first member and the second member between the opposing viewing surfaces of the vertical frame, movement along each of the viewing directions can be prevented, thereby improving workability when installing the first member and the second member.

[0031] The present invention is also characterized in that, in the above-mentioned curtain wall unit, the second member engages with the two adjacent vertical frames when arranged side by side in the projecting direction relative to the first member, thereby preventing the two vertical frames from moving away from each other. According to this invention, since both the first member and the second member can prevent the vertical frames from moving in a direction away from each other, it is possible to more reliably prevent deformation of the vertical frames.

[0032] The present invention is also characterized in that, in the above-mentioned curtain wall unit, at least one of the vertical frames is provided with positioning members at a plurality of spaced positions which abut against a first member arranged at the first position to restrict relative movement along the longitudinal direction with respect to the vertical frame, while allowing relative movement of the first member along the longitudinal direction with respect to the vertical frame when the first member is arranged at the second position. According to this invention, the first members can be provided at multiple positions on the vertical frame, which makes it possible to more reliably prevent deformation of the vertical frame. Moreover, even in a situation where a positioning member is provided in advance on the vertical frame, the first member can be placed at any position by disposing it at the second position. This makes it possible to dispose positioning members in advance at multiple positions on the vertical frame in a well-equipped location such as a factory, which makes it possible to facilitate work at the site where the curtain wall is installed. When the first members are provided in multiple positions, the second member can also be shared by multiple first members.

[0033] The present invention is also characterized in that, in the above-mentioned curtain wall unit, the opposing portions of the two adjacent vertical frames are provided with abutment rib portions extending vertically along the front direction and engagement rib portions extending vertically along the front direction facing each other from the tip edges of the abutment rib portions, and the first member has a base and two engagement plate portions extending in the same direction on both side edges of the base, and when arranged in the first position, the engagement plate portions abut against the abutment rib portions and the opposing inner surfaces of the engagement plate portions abut against the engagement rib portions, thereby preventing movement of the vertical frames away from each other. According to this invention, since the first member has a simplified shape, the work of attaching it between the vertical frames can be facilitated.

[0034] The present invention is also characterized in that, in the above-mentioned curtain wall unit, the opposing portions of the two adjacent vertical frames are provided with a second abutment rib portion extending vertically along the front direction and opposing the abutment rib portion, and a second engagement rib portion extending vertically along the front direction facing each other from the tip edges of the second abutment rib portion, and the second member has a second base and two second engagement plate portions extending in the same direction from both side edges of the second base, and when the second base abuts against the base of the first member arranged at the first position, the second engagement plate portions abut against the second abutment rib portions, thereby preventing movement of the first member to the second position, and the opposing inner surfaces of the second engagement plate portions abut against the second engagement rib portions, thereby preventing movement of the vertical frames in a direction away from each other. According to this invention, since the first member and the second member are disposed between the contact rib portion and the second contact rib portion, it becomes difficult to see from the outside, which is advantageous in terms of appearance quality. [Explanation of symbols]

[0035] 11 vertical frame, 11g outer engagement piece, 11g1 outer abutment rib portion, 11g2 outer engagement rib portion, 11h inner engagement piece, 11h1 inner abutment rib portion, 11h2 inner engagement rib portion, 16 insertion notch, 40 opening stopper part, 41A outdoor component, 41B indoor component, 41a base plate portion, 41b engagement plate portion, 42 connecting screw, 43 positioning screw, 43a head, C curtain wall, CU curtain wall unit

Claims

1. A curtain wall unit in which an opening stopper is provided between two adjacent vertical frames of curtain walls arranged side by side, The opening prevention component has a first member and a second member that are separate from each other, the first member is displaceable to a first position and a second position by moving in a prospective direction relative to the vertical frame, and when disposed at least in the first position, engages with the two adjacent vertical frames to prevent the two vertical frames from moving in directions away from each other; the second member prevents the first member from moving to the second position by engaging with the first member disposed at the first position and the vertical frame; When the first member and the second member are arranged side by side in a prospective direction with the first member disposed at the first position, the first member and the second member abut against the prospective surfaces of the vertical frame facing each other to prevent the first member from moving to the second position, A curtain wall unit characterized in that the second member, when arranged in parallel with the first member in the prospective direction, engages with the two adjacent vertical frames, thereby preventing the two vertical frames from moving away from each other.

2. A curtain wall unit in which an opening stopper is provided between two adjacent vertical frames of a curtain wall arranged side by side, The opening prevention component has a first member and a second member that are separate from each other, the first member is displaceable to a first position and a second position by moving in a prospective direction relative to the vertical frame, and when disposed at least in the first position, engages with the two adjacent vertical frames to prevent the two vertical frames from moving in directions away from each other; the second member prevents the first member from moving to the second position by engaging with the first member disposed at the first position and the vertical frame; A curtain wall unit characterized in that at least one of the vertical frames is provided with positioning members at multiple spaced positions which abut against a first member arranged at the first position to restrict relative movement along the longitudinal direction of the vertical frame, while allowing relative movement of the first member along the longitudinal direction of the vertical frame when the first member is arranged at the second position.

3. A curtain wall unit in which an opening stopper is provided between two adjacent vertical frames of a curtain wall arranged side by side, The opening prevention component has a first member and a second member that are separate from each other, the first member is displaceable to a first position and a second position by moving in a prospective direction relative to the vertical frame, and when disposed at least in the first position, engages with the two adjacent vertical frames to prevent the two vertical frames from moving in directions away from each other; The opposing portions of the two adjacent vertical frames are provided with an abutment rib portion extending vertically along the front direction, an engagement rib portion extending vertically along the front direction from the tip edge of the abutment rib portion while facing each other, a second abutment rib portion extending vertically along the front direction and facing the abutment rib portion, and a second engagement rib portion extending vertically along the front direction while facing each other from the tip edge of the second abutment rib portion, The first member has a base and two engaging plate portions extending in the same direction from both side edges of the base, and when the first member is disposed at the first position, the engaging plate portions each abut against the abutment rib portion, and the opposing inner surfaces of the engaging plate portions each abut against the engaging rib portion, thereby preventing the vertical frames from moving in directions away from each other; The second member has a second base and two second engaging plate portions extending in the same direction from both side edges of the second base, and when the second base abuts against the base of the first member arranged at the first position, the second engaging plate portions abut against the second abutment rib portions, thereby preventing movement of the first member to the second position, and the opposing inner surfaces of the second engaging plate portions abut against the second engaging rib portions, thereby preventing movement of the vertical frames in the direction away from each other.

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