JP3902451B2 - Structure of fastener and its buried setting part - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fastener for connecting a wall material made of precast concrete (hereinafter referred to as “PC”) and a building frame, and a structure of a buried setting portion in which the fastener is embedded in the wall material.
[0002]
[Prior art]
Conventionally, an outer wall material such as a PC curtain wall is connected and fixed to a horizontal member such as a floor of a building frame or a beam using various fasteners.
Hereinafter, a connection fixing portion (hereinafter referred to as “connection fixing portion”) in which two upper and lower PC curtain walls 5 ′ and 6 ′ are connected and fixed to the steel beam 7 ′ using a typical fastener 9 ′. The structure 1 ′ will be described as an example.
[0003]
As shown in FIGS. 4 to 6, the past fastener 9 ′ includes a main body plate 10 ′ provided along the inner wall surface at the joint portion of the upper and lower PC curtain walls 5 ′ and 6 ′, and the main body plate 10. It is embedded in and attached to the lower PC curtain wall 6 'while being inserted into' and is provided with a fixing hardware 30 'joined to a dowel pin 35' planted on the steel beam 7 '.
The main body plate 10 'has a groove 10a' for loosely fitting a connecting bolt 13 'on its upper part, and a push bolt insertion hole 10b' (reference numeral 19 'denotes a push bolt) on the lower part of the groove 10a'. In addition, an insertion hole 10f ′ of the fixing eyebolt 26 ′ with respect to the lower PC curtain wall 6 ′ is provided at the lower end portion, and further, an upper portion of the insertion hole 10f ′ of the eyebolt 26 ′ is provided with the fixing hardware 30 ′. The insertion holes 10c ′ of the embedded portion 31 ′ are respectively drilled.
The fixing hardware 30 ′ is formed of a buried portion 31 ′ embedded in the lower PC curtain wall 6 ′ and a support portion 33 ′ at the tip thereof, and a dowel pin 35 ′ is allowed to play in the support portion 33 ′. A loose fitting hole 33a ′ for fitting is formed.
[0004]
In the conventional connection fixing portion structure 1 ′, the fastener 9 ′ is used, and the connection bolt 13 ′ embedded in the upper PC curtain walls 5 ′ and 6 ′ is passed through the groove portion 10a ′ of the main body plate 10 ′ to adjust the washer. The upper PC curtain wall 5 ′ is fixed by fixing to the main body plate 10 ′ using 14 ′, a sliding material (not shown), a washer 15 ′ and a nut 16 ′. Further, the lower PC curtain wall 6 ′ is fixed by an eyebolt 26 ′ while the embedded portion 31 ′ of the fixing metal 30 ′ is embedded in the lower PC curtain wall 6 ′. Further, the steel beam 7 'is fixed by joining a dowel pin 35' to the lower surface of the support portion 33 'of the fixing metal 30' via a washer 36 'and a nut 38'. The upper and lower PC curtain walls 5 'and 6' and the steel beam 7 'are connected and fixed by the structure 1' of the connecting and fixing part, and the load on the upper and lower PC curtain walls 5 'and 6' is applied to the steel beam 7 '. Can be communicated.
[0005]
[Problems to be solved by the invention]
However, the fastener 9 'and the connecting and fixing part structure 1' have the following problems.
(1) The supporting strength of the fastener 9 'is small, and it is difficult to use it for a large PC curtain wall having a standard weight of about 4t to 5t. Further, since an excessive load is likely to act locally on the support portion 33 ′ of the fixing hardware 30 ′ of the fastener 9 ′, it is difficult to obtain a high support strength.
(2) The embedded portion 31 ′ of the fixing hardware 30 ′ is inserted into the main body plate 10 ′ of the fastener 9 ′, and the fixing degree between the support portion 33 ′ of the fixing hardware 30 ′ and the main body plate 10 ′ is low. Further, since the fixing area of the eyebolt 26 'is small and the sticking force of the eyebolt 26' cannot be expected, a large load cannot be effectively transmitted to the main body plate 10 '.
(3) The dowel bin 35 ′ is not screwed in the support portion 33 ′ of the fixing hardware 30 ′ in the fastener 9 ′.
[0006]
The present invention has been made to solve the above-mentioned problems, and can secure a large support strength, can be easily and reliably attached, and a structure of a buried setting attachment portion in which the fastener is embedded in a wall material. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, a fastener of the present invention is a fastener for connecting a precast concrete wall material and a building frame, and a main body plate fixed to the wall material, A fixing metal projecting on the building housing side, bonded to the building housing, on the wall material side of the main body plate, and fixed in a direction orthogonal to the main body plate; A first fixing bar that is arranged in a direction perpendicular to the fixing plate; and a second fixing bar that extends in the vertical direction of the wall material on the fixing plate, and An end edge portion of the fixing plate on the extension portion side of the second fixing stripe is formed in a shape protruding from an end edge portion of the main body plate on the extension portion side of the second fixing stripe. It is said.
[0008]
Here, it is preferable that the fixing metal is integrally formed.
The fixing hardware includes a fixing portion penetrating the main body plate, a wide-diameter enlarged portion connected to the fixing portion, and a support portion smoothly connected to the enlarged-diameter portion. Then, the fixing property between the fixing metal and the main body plate can be increased, and since the enlarged diameter portion and the support portion are smoothly connected, an excessively large load acts on the support portion locally. Can be prevented. In addition, it is preferable that the diameter-enlarged portion has a cross-sectional shape that decreases from the fixing portion side, and an insertion hole of the support member is formed at the tip of the support portion.
[0009]
According to the present invention, since the main body plate, the fixing plate, and the fixing metal are fixed, the fixing force of each member can be increased, and the fixing metal is effectively resisted by the in-plane horizontal force and the in-plane vertical force. be able to.
Further, since the end edge portion of the fixing plate on the extending portion side of the second fixing stripe is formed in a shape protruding from the end edge portion of the main body plate on the extending portion side of the second fixing stripe, fixing. Even when an excessive load is applied to the hardware, the projection can exert a resistance force, so that it is possible to provide a fastener having a large support strength that can be applied even when the weight of the wall material is large.
In addition, since the fixing plate having the protruding edge portion and the second fixing bar extending and extending in the longitudinal direction of the wall material on the fixing plate, the second fixing bar is provided. The fixing muscle can be a long dimension. Therefore, since the second fixing muscle can exert a resistance, it can be a fastener having a large support strength that can be applied even when the weight of the wall material is large.
[0010]
Note that it is preferable to provide a plurality of fixing plates.
In addition, it is preferable that the first fixing bars are also arranged above and below the fixing plate. In this case, since the distance between the upper and lower first fixing bars can be increased by forming the fixing plate so as to protrude from the edge of the main body plate, an excessive load acts on the fixing hardware. Even so, a large fixing strength can be ensured by the resistance force of the plurality of first fixing muscles.
[0011]
In the fastener setting attachment portion of the present invention, the fixing plate, the first fixing muscles, and the second fixing muscles are embedded in the wall material, and the body plate and the second fixing member are seen in a side view. The reinforcing bars in the longitudinal direction are arranged between the fixing bars.
Here, the reinforcing bars are preferably provided between the first fixing bars and the fixing plate in order to arrange the bars. The length of the reinforcing bar is not particularly limited.
[0012]
According to the present invention, since the fixing strength of the fastener in the buried setting portion can be increased by disposing another reinforcing bar between the main body plate and the second fixing bar, the weight of the wall material is large. It can be set as the structure applicable also to.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail with reference to the drawings.
In the following description, a steel beam 7 (building frame) is joined by a fastener 9 so as to be horizontal with respect to two upper and lower PC curtain walls 5 and 6 (wall materials). The structure 1 of the fixing part will be described as an example. Here, a plurality of horizontal stripes 6a and vertical stripes 6b (only the lower PC curtain wall 6 is shown) are arranged in the upper and lower PC curtain walls 5 and 6 in the horizontal direction and the vertical direction, respectively. The side view refers to the direction shown in FIG.
[0014]
[fastener]
As shown in FIGS. 1 to 3, the fastener 9 includes a main body plate 10, a main body composed of two fixing plates 20 and a fixing hardware 30, a connecting bolt 13, a push bolt 19, a support bolt 35, and the like. It has an accessory part composed.
[0015]
The main body plate 10 is a plate member made of steel for transmitting a load such as its own weight of the upper PC curtain wall 5 to the lower PC curtain wall 6 and the steel beam 7. The upper and lower PC curtain walls 5, 6 Is straddled across the inner wall surface (steel beam 7 side) of the joint portion.
In the center of the upper end portion of the main body plate 10, there is a groove portion 10a whose upper edge is released to insert a connecting bolt 13 as a connecting member, and a lower portion of the groove portion 10a is a push bolt insertion hole 10b. However, a fixing metal insertion hole 10c is formed in the lower portion of the push bolt insertion hole 10b. An air vent hole 10d is formed in the upper part of the fixing metal insertion hole 10c.
[0016]
On the PC curtain walls 5 and 6 side of the lower half of the fixing plate body plate 10, two steel fixing plates 20 are spaced apart from each other by a predetermined interval with the fixing metal insertion hole 10c interposed therebetween. Are welded. The fixing plate 20 has a shape obtained by combining two substantially rectangular portions and a substantially rhombus-shaped portion therebetween, and has protrusions 20a and 20b in the vertical direction, and a lower end (end) of the lower protrusion 20b. The edge portion is formed so as to protrude further than the lower end portion 10e (end edge portion) of the main body plate 10. The lower protrusion 20b is provided so as to extend to the inner side (the side opposite to the end) of the lower PC curtain wall 6 in order to increase the fixing strength at the fixing portion of the fastener 9.
[0017]
Each fixing plate 20 is provided with insertion holes 20c for horizontal pinnacles 21A, 21B (first fixing muscles) (two holes each in this embodiment), and penetrates the insertion holes 20c. In the state, the upper and lower hairpins 21A and 21B are arranged in parallel (in a direction perpendicular to the wall surface of the fixing plate 20). Further, a beard bar 22 (second fixing bar) is welded to the outer wall surface of each fixing plate 20 in the vertical direction (in the direction of the vertical bar 6b of the lower PC curtain wall 6). Note that these hairpins 21 and 21B and the whiskers 22 are provided for the purpose of increasing the fixing strength of the fastener 9 and stiffening the main body plate 10.
[0018]
○ Fixing hardware The fixing metal 30 is made of an integrally formed steel provided to transmit the load of the upper and lower PC curtain walls 5 and 6 to the steel beam 7 via the support bolt 35 (support member) described later. It is a bracket.
The fixing hardware 30 includes a fixing portion 31, a diameter-enlarging portion 32 connected to the fixing portion 31 and wide in the vertical direction, and a vertical direction from the diameter-expanding portion 32 toward the steel beam 7 side. And a support portion 33 that is continuously and smoothly narrowed. The fixing portion of the fixing metal 30 is welded in a state of being inserted into the fixing metal insertion hole 10c of the main body plate 10, and the main body plate 10 and the fixing metal 30 are integrated.
Further, the support portion 33 has a substantially block shape, and both side surfaces expand in a taber shape toward the steel beam 7 side in a plan view, and are smoothly joined to an arcuate spherical surface, A vertical screw hole 33a is formed at the tip (see FIG. 3).
[0019]
[Structure of connecting and fixing part]
The structure 1 of the connecting and fixing portion includes a joint portion between the fastener 9 and the upper PC curtain wall 5 (hereinafter referred to as “upper joint portion 2”), a buried setting attachment portion 3 in which the fastener 9 is embedded in the lower PC curtain wall 6, and It is comprised from the junction part (henceforth "the lower junction part 4") of the said fastener 9 and the steel beam 7. FIG. With this structure, the upper and lower PC curtain walls 5 and 6 and the steel beam 7 are connected and fixed, and the load on the upper and lower PC curtain walls 5 and 6 can be transmitted to the steel beam 7. .
[0020]
Upper joint part The upper joint part 2 has a structure in which the connecting bolt 13 embedded in the upper PC curtain wall 5 is screwed to the main body plate 10 of the fastener 9. Hereinafter, the structure will be described in detail.
In the vicinity of the joint with the lower PC curtain wall 6 at the lower end of the upper PC curtain wall 5, a connecting bolt 13 embedded in advance when the upper PC curtain wall 5 is manufactured has a tip end facing the steel beam 7 side. It is provided in a protruding state. The protruding portion of the connecting bolt 13 is loosely inserted into the groove portion 10 a of the main body plate 10, and is screwed and fastened with a nut 16 via an adjustment washer 14, a sliding material (not shown) and a washer 15, thereby The PC curtain wall 5 and the main body plate 10 are fixed. Reference numeral 18 denotes a steel plate provided along the inner wall surface of the upper PC curtain wall 5.
[0021]
A push bolt 19 is inserted through the push bolt insertion hole 10b. The push bolt 19 is provided to adjust the erection of the upper PC curtain wall 5 by contacting the steel plate 18 fixed to the upper PC curtain wall 5.
Further, the adjustment washer 14 is provided with a slot 14a into which the connecting bolt 13 can be loosely inserted so as to be vertically long when corresponding to the locking method and horizontally long when corresponding to the sway method.
[0022]
○ In the buried setting part 3, the fixing part 31 of each fixing plate 20, the hairpins 21A and 21B, the shavings 22 and the fixing hardware 30 of the fastener 9 is embedded in the upper wall of the lower PC curtain wall 6. The lower PC curtain wall 6 and the main body plate 10 are fixed.
In addition, a plurality (four in this embodiment) of reinforcing bars 25 (other reinforcing bars) formed in a hook shape in a side view are formed on the upper surface portion of the upper pusher bar 21 </ b> A in the lower PC curtain wall 6. The bars are arranged at predetermined intervals in the direction of the vertical bars 6b of the PC curtain wall 6. The reinforcing bars 25 are arranged along the upper surface and side surfaces of the upper hairpin 21A and the side surfaces of the lower hairpin 21B, and the hook portion 25a at the tip is a horizontal wire 6a (hairpin) of the lower PC curtain wall 6. Reinforcing bars arranged parallel to the bars 21A and 21B).
[0023]
○ Lower fixing part The lower fixing part 4 is adjusted by a support bolt 35 for receiving the load of the upper and lower PC curtain walls 5 and 6 in the screw hole 33a in the support part 33 of the fixing hardware 30 and transmitting it to the steel beam 7. It is screwed via a mounting seat plate 36 placed on the channel steel 37, and has a structure in which the upper and lower PC curtain walls 5 and 6 and the steel beam 7 are connected and fixed.
The adjustment groove-shaped steel 37 is welded downward so that the opening 37a is in the upper surface direction of the steel beam 7, and a loose fitting hole 37b for inserting the support bolt 35 is formed in the center of the bottom surface. It has been drilled. The size of the loose fitting hole 37b is determined in advance so as to be able to follow the interlayer displacement between the upper and lower PC curtain walls 5 and 6.
The lower end of the support bolt 35 is placed on the upper flange 7 a of the steel beam 7.
[0024]
A rotation adjustment nut 38 is attached to the upper end of the support bolt 35, and the height of the upper and lower PC curtain walls 5, 6 with respect to the steel beam 7 can be adjusted by turning the rotation adjustment nut 38. ing.
Further, a through hole 36a having substantially the same size as the outer diameter of the support bolt 35 is formed in the mounting seat plate 36, and the positioning and temporary fixing of the support bolt 35 are performed via the mounting seat plate 36. And can be done.
[0025]
The structure 1 of the connecting and fixing portion by the locking method has a clearance that allows the support bolt 35 to move up and down without interposing the mounting seat plate 36 or in the through hole 36a of the mounting seat plate 36. The connecting bolt 13 embedded in the upper PC curtain wall 5 is loosely inserted into the groove 10a of the main body plate 10, and the connecting bolt 13 is loosely inserted with the groove 14a of the adjustment washer 14 in the vertical direction. This is done by screwing and fastening the nut 16 through a material (not shown). Thereby, relative movement in the vertical direction is allowed between the upper and lower PC curtain walls 5 and 6 and the support bolts 35 of the steel beam 7, and between the upper PC curtain wall 5 and the main body plate 10, and the building at the time of the earthquake It is possible to prevent the upper and lower PC curtain walls 5 and 6 from being damaged with respect to the behavior.
[0026]
Further, in the structure 1 of the connecting and fixing portion by the sway method, the support bolt 35 is loosely fitted in the loose fitting hole 37a of the adjustment grooved steel 37 without the mounting seat plate 36 interposed, and is free in the horizontal direction. The connecting bolt 13 embedded in the upper PC curtain wall 5 was loosely fitted in the groove 10a of the main body plate 10, and the connecting bolt 13 was loosely inserted with the groove 14a of the adjustment washer 14 in the horizontal direction. Later, the nut 16 is screwed and fastened through the sliding member and the washer 15.
Thereby, relative movement in the horizontal direction of the lower PC curtain wall 6 joined to the steel beam 7 via the support bolt 35 and the upper PC curtain wall 5 in which the connecting bolt 13 is loosely inserted in the main body plate 10 is allowed. Will be. Accordingly, it is possible to prevent the upper and lower PC curtain walls 5 and 6 from being damaged due to the building behavior during the earthquake.
[0027]
According to the fastener 9, the lower end of the lower protrusion 20 b of the fixing plate 20 embedded in the lower PC curtain wall 6 is formed in a shape protruding from the lower end 10 e of the main body plate 10, thereby fixing metal. Even when an excessive load is applied to 30, since the protrusion can exert a resistance force, the fastener 9 having a large supporting strength that can be applied even when the upper and lower PC curtain walls 5 and 6 are heavy, can do.
Further, since the beard muscles 22 are extended and arranged on the fixing plate 10 from which the lower end portion protrudes, the beard muscles 22 can have a long dimension. Therefore, since the beard muscle 22 can exhibit the resistance, the fastener 9 having a large support strength that can be applied even when the weights of the upper and lower PC curtain walls 5 and 6 are large can be obtained.
[0028]
Further, since the knurled bars 21A and 21B are provided on the upper and lower sides of the fixing plate 10 projecting from the lower end portion, and the distance between the upper and lower pinched bars 21A and 21B can be increased, an excessive load is applied to the fixing hardware 30. Even if it acts, a large fixing strength can be ensured by the resistance force of the plurality of spine muscles 21A and 21B.
Further, the reinforcing bar 25 is disposed between the hairpins 21A and 21B and the main body plate 10 to improve the fixing strength of the fixing unit, so that the upper and lower PC curtain walls 5 and 6 are heavy. Can be matched.
[0029]
Further, since the fixing metal 30 includes the wide diameter expanding portion 32, the fixing property between the fixing metal 30 and the main body plate 10 can be increased, and the diameter expanding portion 32 and the support portion 33 are smoothly formed. Since the shape is tied, it is possible to prevent an excessive load from acting on the support portion 33 locally.
[0030]
Further, according to the structure 1 of the connecting and fixing portion, the fixing plate 20 fixed to the main body plate 10 is embedded in the lower PC curtain wall 6 and the fixing metal 33 protruding from the main body plate 10 has a screw in the fixing portion 33. The fixing bolt of each member can be increased by screwing the support bolt 35 erected on the steel beam 7 into the hole 33a, and the fixing hardware 30 is effectively resisted by the in-plane horizontal force and the in-plane vertical force. be able to.
Further, since the steel beam 7 and the fixing hardware 30 are screwed together with the support bolts 35 in the screw holes 33a of the support portion 33, the loads of the upper and lower PC curtain walls 5 and 6 can be reliably transmitted to the support bolts 35. In addition, it can be easily built.
[0031]
In the above description, the case where the upper and lower PC curtain walls 5, 6 (wall material) and the steel beam 7 (building frame) are connected has been described. You may apply when connecting a curtain wall (wall material) and a steel beam. And the fastener in that case should just have the structure of only the site | part below the push bolt 19 in the said fastener 9 at least.
[0032]
As mentioned above, although an example about a suitable embodiment was explained about the present invention, the present invention is not restricted to the embodiment concerned, and a design change is possible suitably in the range which does not deviate from the meaning of the present invention. Needless to say, the members that form the wall material and the building frame are not limited to PC curtain walls and steel beams. Furthermore, the material, shape, dimensions, and the like of each component can be changed as appropriate.
[0033]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the structure of the embedding setting part which can ensure large support strength and can perform attachment easily and reliably and the embedding setting part which embed | buried the said fastener in the wall material can be provided.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing the structure of a fastener and a connecting and fixing part of the present invention.
FIG. 2 is a front view showing a structure of a fastener and a connecting and fixing part of the present invention.
3 is a cross-sectional view taken along line XX in FIG.
FIG. 4 is a side sectional view showing a structure of a conventional connecting and fixing part.
FIG. 5 is a front view showing a structure of a conventional connection fixing portion.
6 is a cross-sectional view taken along line YY in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Structure of connection fixing | fixed part 2 Upper junction part 3 Burial setting part 4 Lower junction part 5, 6 PC curtain wall (wall material)
6b Longitudinal 7 Steel beam (building frame)
9 Fastener 10 Body plate 10a Groove 10c Fixing hardware insertion hole 10e Lower end (edge)
13 Connecting bolt 20 Fixing plates 20a, 20b Protruding portions 21A, 21B Shark muscle (first fixing muscle)
22 Beard muscle (second fixing muscle)
25 Reinforcing Bar 30 Fixing Hardware 31 Adhering Portion 32 Expanding Portion 33 Supporting Portion 35 Support Bolt (Supporting Member)

Claims (2)

A fastener for connecting a precast concrete wall material and a building frame,
A body plate fixed to the wall material;
A fixing hardware projecting on the building frame side of the main body plate and joined to the building frame;
A fixing plate that is on the wall material side of the main body plate, and is fixed in a direction orthogonal to the main body plate;
First fixing bars arranged in a direction perpendicular to the fixing plate;
A second fixing bar that extends in the vertical direction of the wall material in the fixing plate and is arranged.
An end edge portion of the fixing plate on the extension portion side of the second fixing stripe is formed in a shape protruding from an end edge portion of the main body plate on the extension portion side of the second fixing stripe. Features a fastener. It is the structure of the embedding setting part of the fastener according to claim 1,
While burying the fixing plate, the first fixing muscle and the second fixing muscle in the wall material,
The structure of the embedding setting part characterized in that reinforcing bars in the longitudinal direction are arranged between the main body plate and the second fixing muscles in a side view.

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