JP5452354B2 - Curtain wall and curtain wall fasteners - Google Patents

Description

  The present invention relates to a curtain wall made of precast concrete and a fastener for a curtain wall.

  Patent Document 1 discloses a precast concrete curtain wall having a fastener. The fastener F ′ disclosed in Patent Document 1 connects the lower curtain wall A ′ to the building frame while connecting the curtain walls A ′ and B ′ arranged vertically as shown in FIG. A flat main body plate 101 disposed so as to straddle the boundary between the curtain walls A ′ and B ′, a fixing member 102 embedded in the upper end portion of the lower curtain wall A ′, and a structural housing. The connecting member 103 is provided.

  In Patent Document 1, a convex portion 104 is formed on the upper end portion of the lower curtain wall A ′ so that the upper half of the main body plate 101 extends along the back surface of the upper curtain wall B ′. The lower half of the main body plate 101 is embedded in the convex portion 104.

JP 2003-147891 A

  A clearance of about several tens of millimeters is provided between the curtain wall and the building frame so as to absorb construction errors and the like. This clear lath is closed (interlayer blocking) by a material excellent in fire resistance and heat resistance such as mortar and rock wool, but when the curtain wall A ′ of Patent Document 1 is used, as shown in FIG. Since there is a difference in the size of the clearance C between the portion where the convex portion 104 is present and the portion where the convex portion 104 is not present, there is a possibility that it takes time for the interlayer closing work.

  From such a viewpoint, an object of the present invention is to provide a curtain wall made of precast concrete and a fastener for a curtain wall that can easily perform an interlayer closing work.

The present invention for solving the above-mentioned problems is a curtain wall made of precast concrete comprising a wall body formed by flatly forming the back surface of the upper end portion, and a fastener for connecting the wall body to a building frame, The fastener includes a lower plate portion fixed to an upper end portion of the wall body, an upper plate portion provided on the upper side of the lower plate portion, and a housing projecting from a side surface of the lower plate portion on the building housing side. A connecting portion, and the lower plate portion is embedded in the wall body so that the side surface is substantially flush with the back surface of the wall body, and the upper plate portion is formed from the lower plate portion. Is also located on the building frame side, and is arranged along the back surface of another curtain wall arranged on the upper side of the wall body.
In addition, while projecting the said housing connection part on the side of the flat plate-like part of the lower plate part on the building housing side, an bulging part that bulges to the building body side may be formed at the upper end of the lower plate part. . In this case, the upper plate portion may be positioned on the building skeleton side with respect to the flat plate-like portion of the lower plate portion by rising from the bulging portion.

  If the back surface of the upper end of the wall (surface on the building frame side) is molded into a flat surface without unevenness, and the side surface of the lower plate of the fastener is approximately flush with the back surface of the wall, the curtain wall and the building frame Since the curtain wall can be installed in a state in which the clearance (separation distance) between them is maintained at a uniform size, it is possible to easily perform the interlayer closing work.

  The curtain wall of the present invention is connected to the lower side of the other curtain wall, and the fastener provided in the curtain wall of the present invention connects the curtain walls arranged vertically to each other on the lower side. The curtain wall (that is, the curtain wall of the present invention) is connected to the building frame. The upper plate part of the fastener is arranged along the back surface of the other curtain wall (upper curtain wall), but it is not flush with the lower plate part, but is shifted to the building frame side. Even when another curtain wall of the same thickness as this is disposed on the upper side of the curtain wall of the present invention, the upper plate portion does not interfere with the other curtain wall.

  The fastener may be provided with an anchor embedded in the wall body. If it does in this way, the yield strength of a fastener will improve. The anchor has a shaft portion extending in a direction orthogonal to the lower plate portion, and a male screw formed on the shaft portion is screwed to a female screw provided on the lower plate portion. Good. When the male screw part is used as the anchor, the anchor can be fixed to the lower plate portion without performing labor and costly welding.

  When using a male threaded part as an anchor, the wall body is arranged with an incisor that extends in the vertical direction while intersecting with the shaft portion, and a spiral muscle that surrounds the incisor, or It is desirable to arrange a vertical U-shaped line extending in the vertical direction while intersecting with the anchor and a horizontal U-shaped line extending in the left-right direction while intersecting with the anchor. If it does in this way, the cone-shaped destruction which may generate | occur | produce around an anchor is suppressed, and the proof stress of a fastener comes to improve.

  The lower plate portion, the upper plate portion, and the housing connecting portion may be integrally formed by forging. This eliminates the need for a welding operation, so that quality control is facilitated as compared with the case where a plurality of parts are integrated by welding to form a fastener.

  According to the present invention, the curtain wall can be installed in a state in which the clearance (separation distance) between the curtain wall and the building frame is kept uniform, so that the interlayer sealing work is easily performed. It becomes possible.

It is a perspective view which shows the curtain wall which concerns on embodiment of this invention. It is a figure which shows the structure of a fastener, Comprising: (a) is sectional drawing, (b) is a side view. It is sectional drawing (bar arrangement) of the curtain wall which concerns on embodiment of this invention. It is the X1-X1 sectional view taken on the line of FIG. (A) And (b) is sectional drawing for demonstrating the assembly method of a curtain wall. (A) is sectional drawing which shows the mode of interlayer blockage, (b) is X2-X2 sectional view taken on the line of (a). (A) is sectional drawing which shows the modification of a fastener, (b) is the X3-X3 sectional view taken on the line of (a). (A) is sectional drawing which shows the other modification of a fastener, (b) is the X4-X4 sectional view taken on the line of (a). It is a bar arrangement for explaining the modification of the curtain wall concerning the embodiment of the present invention. X6-X6 cross section of FIG. FIG. 10 is a view on arrow X7-X7 in FIG. 9. It is sectional drawing of the curtain wall which concerns on a prior art. It is the X5-X5 sectional view taken on the line of FIG.

  The curtain wall A according to the embodiment of the present invention is a precast concrete member, and is continuously provided below the other curtain wall B as shown in FIG.

  The curtain wall A includes a wall body W having a reinforced concrete structure and a fastener F for connecting the wall body W to the building frame T.

(fastener)
The fastener F connects the curtain walls A and B arranged in the vertical direction to connect the lower curtain wall A to the building frame T. As shown in FIG. The fastener main body 1 arrange | positioned so that a boundary part (joint) may be straddled, and the some (four in this embodiment) anchor 2, 2, ... embed | buried under the wall W of the curtain wall A is provided.

  The fastener body 1 includes a lower plate portion 11 fixed to the upper end portion of the wall body W, an upper plate portion 12 provided on the upper side of the lower plate portion 11, and a side surface of the lower plate portion 11 on the side of the building frame T (hereinafter referred to as the lower plate portion 11). , Referred to as an “exposed side surface”). The fastener body 1 is a forged product obtained by forging a general structural steel material (SS material), and the lower plate portion 11, the upper plate portion 12, and the housing connecting portion 13 are integrally formed. Note that the material and manufacturing method of the fastener body 1 may be changed as appropriate.

  The lower plate portion 11 is embedded in the wall body W so that the exposed side surface is flush with the back surface 3a of the wall body W. Although the lower plate portion 11 has a flat plate shape (see FIG. 2B), the upper end portion of the lower plate portion 11 bulges toward the building frame T side.

  The lower plate part 11 is formed with a plurality of female screws 11a, 11a,. The female screw 11a is opened on the side surface on the wall W side. In the illustrated lower plate portion 11, female screws 11a, 11a,... Are formed at a total of four locations, two on the left and right sides of the lower end portion and two on the left and right sides of the housing connecting portion 13. It is not intended to limit the position and number of screws 11a.

  The upper plate portion 12 is located on the building skeleton T side with respect to the exposed side surface of the lower plate portion 11, and is disposed along the back surface 4 a of the other curtain wall B disposed on the upper side of the wall body W. That is, the upper plate part 12 is located on the building skeleton T side with respect to the vertical surface including the back surface 3a of the wall body W, and faces the back surface 4a of the other curtain wall B with a gap.

  As shown in FIG. 2B, the upper plate portion 12 is formed with a receiving recess 12a and a screw hole 12b. The receiving recessed part 12a is formed in the upper end part of the upper plate part 12, and is opened upwards. As shown in FIG. 2A, the latching portion 41 of the curtain wall B is inserted into the receiving recess 12a. The screw hole 12 b is formed below the receiving recess 12 a and penetrates the upper plate portion 12. A positioning push bolt 42 is screwed into the screw hole 12b. In addition, the latching | locking part 41 consists of the anchor bolt planted by the curtain wall B, and the external thread is formed in the axial part which protruded from the back surface 4a of the curtain wall B. As shown in FIG.

  The housing connection part 13 protrudes from the exposed side surface of the lower plate part 11 toward the side. The front end portion of the frame connection part 13 is located above the building frame T. A screw hole 13 a is formed at the distal end of the housing connection portion 13. The screw hole 13a penetrates the housing connecting part 13 in the vertical direction. A load receiving bolt 51 is screwed into the screw hole 13a. The load receiving bolt 51 is erected on the upper surface of the building housing T, and is inserted into the insertion hole of the lid plate 52 and is screwed into the screw hole 13a from the lower side of the housing connecting portion 13. The load (including its own weight) applied to the curtain wall A is transmitted to the building frame T via the load receiving bolt 51.

  The anchor 2 improves the pull-out strength of the fastener F, and is embedded in the wall body W in a state where a predetermined covering is secured. The anchor 2 is made of a male screw part, and includes a shaft portion 21 extending in a direction orthogonal to the lower plate portion 11 and a head portion 22 formed integrally with the shaft portion 21.

  A male screw is formed at the end of the shaft portion 21. The male screw is screwed onto the female screw 11 a of the lower plate portion 11. The head 22 is a forged part and has a truncated cone shape. The anchor 2 disposed on the upper side and the anchor 2 disposed on the lower side have the same configuration, but the shaft portion 21 and the head portion 22 of the lower anchor 2 are those of the upper anchor 2. It is thicker than. Of course, the same diameter may be used.

  Note that the shape of the head 22 may be changed as appropriate. Further, although not shown, the anchor 2 may be formed by friction welding or welding a screw rod serving as a shaft to a steel plate serving as a head.

  In order to fix the anchor 2 to the fastener body 1, after the male screw of the shaft portion 21 is screwed to the female screw 11 a of the lower plate portion 11, a loosening nut (not shown) screwed to the male screw is attached. Tighten.

(Wall body)
As shown in FIG. 1, the wall body W has a flat plate shape. Of the back surface 3a of the wall W, at least the upper end (portion facing the side surface of the building skeleton T) is formed flat.

  As shown in FIGS. 3 and 4, the wall body W includes wall bars 31, 31 arranged in two rows on the front and back sides, and an insertion line extending in the vertical direction while intersecting the shaft portion 21 of the anchor 2. 32, a spiral line 33 that surrounds the insertion line 32, and a width stop line 34 that holds the space between the wall lines 31 and 31 are arranged. In FIGS. 3 and 4, hatching to be attached to the wall body W is omitted.

  The wall bars 31 are a combination of a plurality of vertical bars 31a, 31a,... And a plurality of horizontal bars 31b, 31b,.

  The insertion line 32 three-dimensionally intersects with the anchors 2 and 2 arranged in the vertical direction and extends to the lower side of the lower anchor 2. The insertion bar 32 is located between the wall bars 31 and 31 and is arranged so as to be in contact with the horizontal bars 31b, 31b, ... of the wall bars 31 on the fastener F side. In the present embodiment, as shown in FIG. 4, reinforcing bars 32 and 32 are arranged on the left and right sides of the shaft portion 21 of the anchor 2.

  The spiral muscles 33 are arranged at two places on the left and right sides, and surround the pair of insertion bars 32, 32, respectively. That is, one spiral line 33 is arranged for a pair of insertion bars 32 and 32 that sandwich the shaft portion 21 of the anchor 2 from the left and right. The spiral muscle 33 of the present embodiment also surrounds the head 22 of the anchor 2. The spiral muscles 32 may be arranged so as to include a range in which cone-like fracture is assumed (a frustoconical range extending from 45 to 60 degrees from the periphery of the head 22). In the present embodiment, FIG. As shown, the upper and lower anchors 2 and 2 are included and extend to the lower side of the lower anchor 2.

  As shown in FIG. 4, the width stop bars 34 are arranged on both the left and right sides with the two spiral bars 33 interposed therebetween. As shown in FIG. 3, the width stop line 34 of the present embodiment has an inverted U shape, and restrains the top horizontal bars 31 b and 31 b and the second horizontal bars 31 b and 31 b from the top. .

Next, a method for assembling the curtain walls A and B will be described with reference to FIG.
As shown in FIG. 5A, first, a cover member 53 having a groove shape that opens downward is fixed to the upper surface of the building frame T (for example, the upper surface of a flange of a steel frame). The cover member 53 is made of, for example, channel steel (see FIG. 1).

  If the cover member 53 is installed, the curtain wall A is installed. Specifically, the load receiving bolt 51 screwed to the frame connecting portion 13 of the curtain wall A is loosely inserted into the opening provided on the upper surface of the cover member 53, and the load receiving bolt 51 is inserted into the upper surface of the building frame T. May be placed (see FIG. 5B). The opening of the cover member 53 is closed with a cover plate 52 attached to the shaft portion of the load receiving bolt 51. The lid plate 52 is fixed to the upper surface of the cover member 53 by means such as welding. In the case of the locking method, a through hole having substantially the same size as the outer diameter of the bolt 51 (the outer diameter of the bolt 51 plus about 1 mm) is formed in the lid plate 52. In the case of the sway system, although not shown in the drawings, a long hole (in a lateral direction) is formed in the lid plate 52 corresponding to one of the two fasteners attached to one curtain wall. Loose hole) is formed.

  When the curtain wall A is installed at a predetermined position, as shown in FIG. 5B, another curtain wall B is built above the curtain wall A. Specifically, a fastener (not shown) provided at the upper end of the curtain wall B is inserted into the receiving recess 12a of the lower curtain wall A while the locking portion 41 provided at the lower end of the curtain wall B is loosely inserted. What is necessary is just to connect to the building frame (not shown) of an upper floor. Since the upper plate portion 12 of the fastener F is not flush with the lower plate portion 11 and is shifted to the building frame T side, another curtain wall B of the same thickness as this is placed above the curtain wall A. Even if they are arranged flush, the upper plate portion 12 does not interfere with other curtain walls B.

  When the curtain wall B is built, the lower end portion of the curtain wall B is positioned by screwing the push bolt 42 into the screw hole 12b of the lower curtain wall A and adjusting the screwing amount. Thereafter, as shown in FIG. 1, the adjustment plate 43 is disposed so as to cover the receiving recess 12a, and the nut 45 is screwed into the locking portion 41 with the washer 44 interposed therebetween. Wear a stop. The adjustment plate 43 is fixed to the upper plate portion 12 by means such as welding. Since the present embodiment is a locking system, the adjustment plate 43 is formed with a vertically long loose hole. In the case of the sway method, a horizontally long loose hole is formed.

Next, with reference to FIG. 6, the procedure of the interlayer blocking work will be described.
As shown to (a) of FIG. 6, the steel plate 61 is first installed in the clearance formed between the upper end part of the curtain wall A, and a building frame. The steel plate 61 is installed below the housing connecting portion 13 of the fastener F. The thickness of the steel plate 61 is desirably 1.6 mm or more. In the present embodiment, the back surface 3a of the wall body W is formed into a flat surface without unevenness, and the exposed side surface of the lower plate portion 11 is flush with the back surface 3a of the wall body W. It becomes possible to install.

  If the steel plate 61 is installed, the steel plate 61 is filled with a filler 62 made of a material excellent in fire resistance and heat resistance (for example, mortar, concrete, rock wool, etc.) to close the clearance.

  According to the curtain wall A according to the present embodiment described above, as shown in FIG. 6B, the back surface 3a of the wall body W is formed into a flat surface without unevenness, and the lower plate portion 11 of the fastener F is formed. Since the exposed side surface of the wall body W is flush with the back surface 3a of the wall body W, the curtain wall A is installed in a state where the clearance (separation distance) between the curtain wall A and the building frame T is kept uniform. It becomes possible. That is, when the curtain wall A is used, the interlayer closing work can be easily performed.

  Further, in the present embodiment, the fastener body 1 is a forged product and the anchor 2 is a male screw part. Therefore, the quality control of the fastener F is facilitated, and the fastener F can be attached without welding that is laborious and expensive. Can be obtained.

  Further, in the present embodiment, since the insertion bar 32 and the spiral bar 33 are arranged on the wall W, the cone-like breakage that may occur around the anchor 2 is suppressed, and the pull-out strength of the fastener F is increased. high.

Note that the configuration of the fastener F may be changed as appropriate.
For example, in the above-described embodiment, the case where the side surface of the lower plate portion on the wall body W side is formed into a flat surface without unevenness is illustrated. However, a cotter (concave portion) is provided on the side surface of the lower plate portion 11 on the wall body W side. It may be provided. There are no restrictions on the position and number of the cotters, and for example, as shown in FIGS. 7A and 7B, a pair of left and right cotters (recesses) 11b and 11b may be provided, or FIG. ) And (b), cotters 11b, 11b,... That are continuous in the left-right direction may be provided side by side. When the cotter 11b is provided, a vertical force acting on the curtain wall A can be transmitted to the fastener F.

  Further, as shown in FIG. 10, an air hole 11 c may be provided in the fastener body 1. If it does in this way, it will become difficult to form an air pocket in the back of fastener main part 1.

  In the above-described embodiment, the case where the incisor bar 32 and the spiral bar 33 are arranged is illustrated, but instead of these, as shown in the wall body W ′ shown in FIG. 9, the vertical U-shaped bar 36 and the horizontal U-shaped bar. 37 may be arranged. FIG. 9 is a bar arrangement diagram of the wall body W ′ viewed from the back side (building housing side). In FIG. 9, the U-shaped bars 36 and 37 are lightly shaded or hatched so that the U-shaped bars 36 and 37 are easily distinguished from other reinforcing bars, and the fastener body 1 is not shown.

The bar arrangement of the wall body W ′ will be described in more detail.
The wall body W ′ includes wall bars (vertical bars 31a, horizontal bars 31b) and width stop bars 34, a J-shaped bar 35 extending in the vertical direction, a vertical U-shaped bar 36 extending in the vertical direction, and left and right A horizontal U-shaped line 37 extending in the direction is arranged. The configuration of the wall bars and the width stop bars 34 is the same as described above. In FIG. 10, the J-shaped streak 35 is also lightly inked.

  As shown in FIG. 10, the J-shaped streak 35 is a reinforcing bar having a reverse J-shape when viewed from the side. The upper U-shaped portion is used to form the uppermost horizontal streaks 31 b and 31 b and the second step from the top. The horizontal stripes 31b and 31b are constrained. Among the J-shaped bars 35, a straight line portion 35a along the front side (outside) wall bars (vertical bars 31a) extends to an intermediate position between the upper and lower anchors 2 and 2, and the back side (inner side) wall bars (vertical bars) The straight portion 35b along the line 31a) extends to the lower side of the lower anchor 2. As shown in FIG. 11, two J-shaped bars 35 are arranged on both sides of the fastener F (left and right vertical U-shaped bars 36, 36). Note that the position and number of the J-shaped streaks 35 may be changed as appropriate.

  As shown in FIG. 9, the vertical U-shaped line 36 is a reinforcing bar having a reverse U-shape when viewed from the front, and is arranged so as to surround the anchors 2, 2 arranged vertically. That is, the vertical U-shaped line 36 is arranged corresponding to a pair of anchors 2 and 2 arranged vertically. Of the vertical U-shaped line 36, the left and right straight portions 36 a and 36 a are arranged so as to sandwich the shaft portion 21 of the anchor 2. The straight portion 36a extends to the lower side of the lower anchor 2 and three-dimensionally intersects with the shaft portions 21 and 21 of the anchors 2 and 2 arranged in the vertical direction, and is three-dimensional with a plurality of horizontal stripes 31b, 31b,. Crossed. Of the vertical U-shaped line 36, an arc-shaped portion (bending end) 36 b that connects the left and right straight portions 36 a and 36 a is disposed so as to straddle the upper anchor 2 at a position close to the upper anchor 2.

  As shown in FIG. 10, two vertical U-shaped bars 36 are arranged for each pair of anchors 2 and 2 arranged vertically. Since the fastener F has a pair of upper and lower anchors 2 and 2 arranged in two rows on the left and right, as shown in FIG. 11, four vertical U-shaped bars 36, 36,. Will be. Note that the vertical U-shaped line 36 is arranged between the front side wall line and the back side wall line.

  The front side vertical U-shaped line 36 is arranged for the purpose of preventing cone-like destruction around the head of the anchor 2, and is arranged on the back side of the maximum diameter part of the anchor 2. That is, the vertical U-shaped bar 36 on the front side is arranged close to the head of the anchor 2 and resists a tensile force (out-of-plane force) acting via the anchor 2. As shown in FIG. 10, the top of the vertical U-shaped bar 36 on the front side is located at the same height as the top of the J-shaped bar 35, but when it interferes with other reinforcing bars, It is possible to dispose them appropriately.

  The vertical U-shaped bar 36 on the back side is arranged for the purpose of preventing splitting of the concrete and fracture of bearing pressure, and is arranged so as to intersect the central portion in the axial direction of the anchor 2. That is, the vertical U-shaped bar 36 on the back side is arranged along the back surface (the side surface on the wall body W ′ side) of the fastener body 1, and against the shearing force (in-plane force) in the direction of the end of the anchor 2. Resist. The top of the vertical U-shaped bar 36 on the back side is located below the top of the vertical U-shaped bar 36 on the front side. However, if it interferes with other reinforcing bars, etc. It can be placed.

  As shown in FIG. 9, the horizontal U-shaped line 37 is a reinforcing bar that has a horizontal U-shape when viewed from the front, and is arranged so as to surround the anchors 2, 2 arranged side by side. That is, the horizontal U-shaped line 37 is arranged so as to intersect the vertical U-shaped line 36.

  Of the horizontal U-shaped line 37, the upper and lower straight portions 37a and 37a are arranged so as to sandwich the shaft portion 21 of the anchor 2, and each of them intersects with the anchors 2 and 2 arranged on the left and right in a three-dimensional manner. Are three-dimensionally intersected with the vertical bars 31a, 31a,. Of the horizontal U-shaped line 37, an arcuate portion (bending end) 37b that connects the upper and lower straight portions 37a, 37a is located at the side edge of the wall W '.

  The horizontal U-shaped bars 37 are arranged for the purpose of preventing the splitting of the concrete and the bearing failure, and are arranged so as to intersect with the axial center of the anchor 2 as shown in FIG. Yes. That is, the horizontal U-shaped bar 37 is arranged along the back surface of the fastener body 1 and resists a shearing force (in-plane force) in the end-to-end direction of the anchor 2. The horizontal U-shaped line 37 is located between the vertical U-shaped line 36 on the front side and the vertical U-shaped line 36 on the back side, and is arranged so as to be in contact with the vertical U-shaped line 36 on the back side. In the case of interference with other reinforcing bars, etc., they may be shifted appropriately.

  As described above, when the vertical U-shaped bar 36 is arranged in the vertical direction and the horizontal U-shaped line 37 is arranged in the left-right direction, resistance to cone-shaped fracture, split fracture, bearing fracture, and the like increases. Further, when the J-shaped bar 35 is arranged, the resistance to bending of the PCa plate is increased. In addition, the J-shaped bar 35, the vertical U-shaped bar 36, and the horizontal U-shaped bar 37 can be inserted from above or from the side even after the wall bars and the anchor 2 have been arranged, so that the arrangement work is easy. Become. In addition, since the J-shaped line 35, the vertical U-shaped line 36, and the horizontal U-shaped line 37 are arranged at an appropriate interval, the filling property of the concrete is not impaired.

A Curtain wall F Fastener 1 Fastener body 11 Lower plate part 12 Upper plate part 13 Body connection part 2 Anchor 21 Shaft part 22 Head W Wall body 32 Insertion bar 33 Spiral line 34 Width stop line 35 J-shaped line 36 Vertical U-shaped line 37 Horizontal U-shaped B Other curtain wall T Building frame

Claims (6)

A wall body in which the back surface of the upper end portion is formed flat;
A fastener wall for connecting the wall body to the building frame, and a curtain wall made of precast concrete,
The fastener protrudes from the lower plate portion fixed to the upper end portion of the wall body, the upper plate portion provided on the upper side of the lower plate portion, and the side of the flat plate portion of the lower plate portion on the side of the building frame. A housing connecting portion provided,
The flat plate portion of the lower plate portion is embedded in the wall body so that the side surface is substantially flush with the back surface of the wall body,
A bulging portion that bulges toward the building body side is formed at the upper end of the lower plate portion,
The upper plate portion rises from the bulging portion and is located on the building housing side with respect to the flat plate-like portion of the lower plate portion , and the back surface of another curtain wall disposed on the upper side of the wall body A curtain wall characterized by being arranged along. A wall body in which the back surface of the upper end portion is formed flat;
A fastener wall for connecting the wall body to the building frame, and a curtain wall made of precast concrete,
The fastener includes a lower plate portion fixed to an upper end portion of the wall body, an upper plate portion provided on the upper side of the lower plate portion, and a housing projecting from a side surface of the lower plate portion on the building housing side. Having a connection part and an anchor embedded in the wall ,
The lower plate portion is embedded in the wall body so that the side surface is substantially flush with the back surface of the wall body,
The upper plate portion is located on the building housing side from the lower plate portion, and is disposed along the back surface of another curtain wall disposed on the upper side of the wall body ,
The anchor has a shaft portion extending in a direction orthogonal to the lower plate portion, and a male screw formed on the shaft portion is screwed to a female screw provided on the lower plate portion. And curtain wall.   The curtain according to claim 2, wherein an incision bar that extends in a vertical direction while intersecting the shaft portion and a spiral line that surrounds the incision line are arranged on the wall body. Wall.   A vertical U-shaped line extending in the vertical direction while intersecting with the anchor and a horizontal U-shaped line extending in the left-right direction while intersecting with the anchor are arranged in the wall body. The curtain wall according to claim 2.   The curtain wall according to claim 3 or 4, wherein the lower plate portion, the upper plate portion, and the housing connecting portion are integrally formed by forging. A curtain wall fastener for connecting the lower curtain wall to the building frame while connecting the curtain walls arranged vertically,
A lower plate portion embedded in the wall of the lower curtain wall, an upper plate portion provided on the upper side of the lower plate portion, and a housing connection portion protruding on one side surface of the lower plate portion, An anchor projecting from the other side of the lower plate part,
The anchor has a shaft portion extending in a direction orthogonal to the lower plate portion, and a male screw formed on the shaft portion is screwed to a female screw provided on the lower plate portion,
The upper plate part is located on the side of the building frame from one side surface of the lower plate part, and is arranged along the back surface of the upper curtain wall.

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