JP6466709B2 - Connecting structure and wall material - Google Patents

Description

  The present invention relates to a structure for connecting a precast concrete wall material and a building frame.

  As a method for connecting a precast concrete wall material to a floor or a beam of a building frame, one using a fastener is known. Patent Document 1 discloses a structure in which a fixing plate is fixed to a main body plate and a knurled line extending in a direction orthogonal to the fixing plate is provided.

Japanese Patent No. 3902451

  The fastener supports the weight of the wall material and also acts laterally due to an earthquake or the like. Although it is effective to increase the reinforcing bars in order to prevent the fastener from being pulled out due to the lateral force, the number of reinforcing bars is limited due to the bar arrangement space in the wall material.

  An object of the present invention is to improve the pull-out prevention performance of a fastener against a lateral force.

According to the present invention, for example, a connection structure that connects a wall material made of precast concrete and a building frame with a fastener, the fastener being fixed to the wall material, and the building plate from the body plate A fixing metal projecting on the housing side, joined to the building body, a fixing plate projecting from the main body plate to the wall material side and extending in the vertical direction, and embedded in the wall material; The wall member includes a horizontal bar extending in the width direction of the wall member, and a reinforcing bar extending in the width direction of the wall member at a fixing portion of the fastener, and the fixing plate has the horizontal bar inserted therethrough. A first insertion portion to be inserted, and a second insertion portion through which the reinforcing bar is inserted, wherein the wall material has a region where the fixing portion is included and is thicker than other regions. Is more of the wall material than the transverse bar Are located on the body plate side viewed direction, connecting structure is provided, characterized in that.

  ADVANTAGE OF THE INVENTION According to this invention, the pull-out prevention performance of the fastener with respect to a lateral force can be improved.

The perspective view of the wall material which concerns on one Embodiment of this invention. (A) is an external view of the connection structure which concerns on one Embodiment of this invention, (B) is a figure which shows the example of the edge part shape of a reinforcing bar. II sectional view taken on the line I-I of FIG. II-II sectional view taken on the line of FIG. III-III sectional view taken on the line of FIG.

  FIG. 1 is a perspective view of a wall material 1 according to an embodiment of the present invention. In each drawing including FIG. 1, an arrow Z indicates a vertical direction (vertical direction), and arrows X and Y indicate horizontal directions orthogonal to each other. In particular, the arrow X indicates the thickness direction (normal direction) of the wall material 1, and the arrow Y indicates the left-right direction (plane direction) of the wall material 1.

  The wall material 1 is made of precast concrete, and its appearance has a substantially rectangular parallelepiped shape. The inner surface 1a of the wall material 1 is a surface on the indoor side, and the outer surface 1b is a surface on the outdoor side. Two fasteners 4 are provided on the top of the wall material 1. In the case of FIG. 1, the structure of a part of the fastener 4 is shown. The fastener 4 is provided on the wall material 1 when the wall material 1 is manufactured. One of the two fasteners 4 is provided on one end side in the width direction (Y direction) of the wall material 1, and the remaining one of the two fasteners 4 is in the width direction of the wall material 1 ( (Y direction) is provided on the other end side. For example, the fastener 4 may be disposed within a range of 1/4 of the length in the width direction of the wall material 1 from the end surface in the width direction of the wall material 1 or 1/8 in length. It may be within the range or within the range of 1/16 length.

  In order to improve the fixing force of the fastener 4, it is effective to increase the bar arrangement amount of the wall material 1 at the fixing portion of the fastener 4. In order to increase the amount of reinforcement, it may be necessary to increase the thickness of the wall material concrete in order to secure the cover thickness. However, increasing the thickness over the entire area of the wall material 1 causes an increase in weight. . Therefore, in the present embodiment, the wall material 1 is thicker in the region S including the fixing portion of the fastener 4 than in other regions. The region S has a height H and a width W, and protrudes toward the inner surface 1a. The outer surface 1b is flat over the entire area. By partially increasing the thickness of the wall material concrete in the region S, the amount of bar arrangement can be increased while suppressing an increase in the weight of the wall material 1.

  2-5 has shown the connection structure A which concerns on one Embodiment of this invention. The connection structure A is a structure in which the wall material 1 and the building frame 3 are connected by the fastener 4. 2A is an external view of the connection structure A, and shows the structure around the fastener 4 when viewed in the direction of the line of sight d1 in FIG. 1 (when viewed from the indoor side). 3 is a cross-sectional view taken along line II in FIG. 2A, FIG. 4 is a cross-sectional view taken along line II-II in FIG. 3, and FIG. 5 is a cross-sectional view taken along line III-III in FIG.

  In the case of the present embodiment, it is assumed that the wall material 2 is arranged side by side above the wall material 1. In the case of the present embodiment, the wall material 2 is assumed to have the same configuration as the wall material 1, but may have a different configuration. Among the configurations of the wall material 2, the same reference numerals as those of the wall material 1 are assigned to the same configurations as the wall material 1. In the case of this embodiment, the building frame 3 is a steel beam.

  In the wall material concrete of the wall material 1, a plurality of vertical bars 11 and horizontal bars 12 are arranged throughout. The reinforcing bar 11 is a vertical bar extending in the Z direction. The reinforcing bar 12 is a horizontal bar extending in the Y direction.

  The fastener 4 includes a main body plate 41, a fixing hardware 42, a fixing plate 43, and fixing bars 44 and 45.

  The main body plate 41 is a plate-shaped steel material fixed to the wall material 1 in a vertical posture, and is embedded in the inner surface 1a side of the wall material 1 so that the inner surface 41a on the indoor side is exposed. In the center of the upper end portion of the main body plate 41, a groove portion 411 opened upward is formed. The connecting bolt 13 embedded in the wall material 2 is inserted into the groove 411. The head of the connecting bolt 13 is embedded in the wall material concrete of the wall material 2, and the screw rod portion protrudes horizontally from the inner surface 1a to the indoor side. A steel plate 1 c is fixed to the inner surface 1 a around the connecting bolt 13.

  The groove 411, the long hole of the adjustment washer 46a, and the hole of the washer 46b are inserted through the threaded rod portion of the connecting bolt 13 in this order, and the nut 46c is screwed. The wall material 2 and the main body plate 41 are fixed by fastening the nut 46c. A sliding material may be provided between the adjustment washer 46a and the washer 46b.

  The main body plate 41 includes a screw hole 412 formed below the groove 411. A push bolt 47 is screwed into the screw hole 412. By bringing the tip of the push bolt 47 into contact with the steel plate 21, the erection of the wall material 2 can be adjusted.

  Thus, the wall material 2 is connected to the main body plate 41, and a load such as the weight of the wall material 2 can be transmitted to the wall material 1 and the building frame 3 via the main body plate 41.

  Next, the body plate 41 has an air vent hole 413 formed below the screw hole 412. A fixing metal 42 is joined further below the air vent hole 413.

  The fixing hardware 42 protrudes from the inner surface 41a of the main body plate 41 toward the building housing 3 side. The fixing hardware 42 includes a plate portion 421 and a boss portion 422. The plate portion 421 has a plate shape, and an end portion thereof is fixed to the main body plate 41 by welding or the like, thereby projecting horizontally from the inner surface 41a. A reinforcing rib 48a is fixed between the upper surface of the plate portion 421 and the inner surface 41a by welding or the like, and a reinforcing rib 48b is fixed between the lower surface of the plate portion 421 and the inner surface 41a by welding or the like. Yes. The boss portion 422 is integrally formed on the lower surface of the plate portion 421. The boss portion 422 is formed with a screw hole h that penetrates these in the Z direction. A support bolt 31 is screwed into the screw hole.

  An adjustment base 32 made of channel steel or the like is fixed to the building housing 3, and an opening 32 a into which the support bolt 31 is loosely inserted is formed on the top plate portion. On the adjustment base 32, a mounting base 33 in which a hole having substantially the same diameter as the outer diameter of the support bolt 31 is formed is fixed. The support bolt 31 can be positioned by the fixing position of the mounting base 33.

  The lower end of the support bolt 31 is in contact with the upper surface of the building case 3, and the height of the wall materials 1 and 2 with respect to the building case 3 can be adjusted by turning the support bolt 31. Thus, the fastener 4 can connect the wall materials 1 and 2 and the building housing 3 and transmit the load of the wall materials 1 and 2 to the building housing 3.

  Next, the fixing plate 43 protrudes from the main body plate 41 toward the wall material 1 and is embedded in the wall material 1. In the present embodiment, the fixing plate 43 is fixed to the outer surface 41b of the main body plate 41 in a vertical posture by welding or the like. The fixing plate 43 protrudes obliquely downward from the outer surface 41a to the outer surface 1b side of the wall material 1. In the present embodiment, two fixing plates 43 are provided apart from each other in the Y direction, but may be one or three or more.

  The fixing bars 44 and 45 are reinforcing bars extending in the Z direction. In the case of the present embodiment, the fixing bar 44 is linear, and the upper part thereof is fixed to the fixing plate 43 by welding or the like and extends downward from the fixing plate 43. The fixing stripe 44 is fixed to the end of the fixing plate 43 in the X direction on the outer surface 1 b side of the wall material 1. A plurality of fixing muscles 44 are provided (here, two). The fixing stripes 44 are fixed to the outer surfaces of the two fixing plates 43.

  In the case of the present embodiment, the fixing muscle 45 has a U-shape, the upper part thereof is vertical, the upper part is bent and the lower part extends obliquely. The upper part of the fixing bar 45 is fixed to the outer surface 41a of the main body plate 41 by welding or the like. The lower part of the fixing bar 45 extends obliquely downward from the outer surface 41a to the outer surface 1b side of the wall material 1 and reaches between the vertical bars 11 spaced in the X direction. A plurality of fixing muscles 45 are provided (here, three). The fixing muscle 45 is located inside the two fixing plates 43.

  Each fixing plate 43 is formed with insertion portions 431 to 433. In the case of the present embodiment, the insertion portions 431 to 433 are through holes, and the periphery of the hole is closed, but a cutout or the like may be used instead of the through hole.

  The horizontal stripes 12 of the wall material 1 are inserted through the insertion portion 431. In the present embodiment, for each fixing plate 43, one horizontal bar 12 passes through one insertion part 431, but a plurality of horizontal bars 12 may pass through one insertion part 431. Further, in the present embodiment, one insertion portion 431 through which the transverse stripe 12 is inserted is provided for each fixing plate 43, but a plurality of insertion portions 431 may be provided. By inserting the horizontal stripes 12 through the fixing plate 43, it is possible to improve the stress transmission of the lateral force between the fastener 4 and the wall material concrete of the wall material 1.

  The reinforcing bars 5 are inserted through the insertion portions 432 and 433, respectively. The reinforcing bar 5 is a horizontal reinforcing bar that extends in the width direction of the wall material 1 at the fixing portion of the fastener 4. In the present embodiment, a plurality of reinforcing bars 5 are arranged in the Z direction, two of which are inserted through the insertion portions 432 and 433. The number of reinforcing bars 5 may be one. By providing the reinforcing bars 5, it is possible to improve the lateral force stress transmission between the fastener 4 and the wall material concrete of the wall material 1. By inserting the reinforcing bars 5 through the fixing plate 43, it is possible to further improve the stress transmission of the lateral force between the fastener 4 and the wall material concrete of the wall material 1.

  In the case of this embodiment, for each fixing plate 43, one reinforcing bar 5 is inserted through one insertion part 432 or 433, but a plurality of reinforcing bars 5 are inserted through one insertion part 432 or 433. Also good. In the present embodiment, two insertion portions 432 and 433 through which the reinforcing bars 5 are inserted are provided for each fixing plate 43, but one or three or more may be used. A configuration in which the reinforcing bar 5 does not pass through the fixing plate 43 can also be adopted.

  The reinforcing bars 5 are located closer to the main body plate 41 than the center in the thickness direction (X direction) of the wall material 1. This means that the reinforcing bar 5 passes through a position closer to the fastener 4 than when the reinforcing bar 5 is arranged on the outer surface 1b side, and the lateral force stress transmission between the fastener 4 and the wall material concrete of the wall material 1 is achieved. Can be further improved. In particular, in the case of the present embodiment, the plurality of reinforcing bars 5 are extended on the main body plate 41 side with respect to the vertical bars 11, and the stress transmission of the lateral force can be further improved. In addition, all the reinforcing bars 5 may be extended on the main body plate 41 side from the vertical bars 11.

  The reinforcing bar 5 includes a linear portion 51 that extends horizontally, an end 51, and an end 52. The end portion 51 is an end portion on the center side in the width direction of the wall material 1, and is an end portion of the linear portion 51. The end portion 52 is an end portion on the side in the width direction of the wall material 1, and is an end portion that is bent and extends from the straight portion 51.

  In the case of the present embodiment, the fixing site is difficult to secure on the end 52 side because the site where the fastener 4 is disposed is on the end side in the width direction of the wall material 1. Therefore, by fixing the reinforcing bar 5 on the end portion 52 side, the fixing property is improved in a narrow space. In the case of this embodiment, the end 52 reaches the vertical stripes 11 and the horizontal stripes 12 on the outer surface 1b side.

  In the case of the example of FIG. 4, the end 52 side is bent in an L shape toward the outer surface 1b with respect to the straight portion 51, but may be bent downward or upward, and the shape of the bend is also L-shaped. For example, it may be bent into a U shape as shown in FIG.

  The reinforcing bar 5 has a length L (FIG. 4) from the fixing plate 43 to the end portion 51 that is 20 times or more, preferably 30 times or more the diameter of the reinforcing bar 5. The fixing force can be secured by setting the length L to 20 times or more the diameter of the reinforcing bar 5, and the fixing force can be sufficiently secured by setting the length L to 30 times or more. Since the end 51 side is located on the center side in the width direction of the wall material 1, the length L can be easily secured longer.

  A plurality of restraint bars 6 are arranged on the wall material 1. The restraint bars 6 are hoop bars surrounding all the reinforcing bars 5 and the lateral bars 12 on the outer surface 1b side, and a plurality of the binding bars 6 are arranged in the Y direction. When the restraint bars 6 are arranged, stress transmission in the out-of-plane direction around the fastener 4 and adhesion and fixing of the reinforcing bars 5 can be improved, and cracking of the wall material concrete occurs and the wall material 1 is peeled off from the fastener 4. Can be suppressed.

  The wall material 1 is also embedded with reinforcing bars 7, reinforcing bars 8, and reinforcing bars 9A and 9B. The reinforcing bars 7 have an inverted U shape as a whole, and are arranged for each fixing plate 43 so as to sandwich the fixing plate 43 therebetween. The reinforcing bar 7 assists in the transmission of shearing and bending stress between the wall material concrete and the fastener 4 in the upper part of the fixing plate 43, and can further suppress the generation of bending stress around the main body plate 41.

  The reinforcing bar 8 has a U-shape that is open downward as a whole, and is arranged so as to straddle the inner horizontal bar 12 and the outer horizontal bar 12. In the present embodiment, two reinforcing bars 8 are provided, and are located on the outer sides of the two fixing plates 43. The reinforcing bar 8 can improve stress transmission between the fastener 4 and the wall material concrete in the out-of-plane direction or the vertical direction.

  The reinforcing bars 9A and 9B are horizontal reinforcing bars. The reinforcing bars 9A and 9B pass above the fixing plate 43 in the Y direction. The reinforcing bars 9A are arranged on the indoor side relatively on the upper side, and the reinforcing bars 9B are arranged on the outdoor side relatively on the lower side. . The reinforcing bars 9A and 9B improve the stress transmission between the fastener 4 and the wall material concrete in the upper part of the fixing plate 43.

  Next, the relationship between the region S and the reinforcing bars will be described. Since the region S is a portion that is thicker than the other regions, the region S is preferably a narrow region. In the case of the present embodiment, the width W and the height H of the region S are set so as to include the reinforcing bar 5 region. The height H of the region S is also set so as to include the intersection of a 45-degree imaginary line passing through the center in the height direction of the fixing plate 43 on the center side and the end face of the wall material 1 in consideration of suppression of cracks. be able to. The thickness of the wall material 1 in the region S can be set on the basis of the cover thickness of the restraining bar 6.

  In the connection structure A having the above-described configuration, since the horizontal streak 12 passes through the fixing plate 43, it is possible to improve the lateral force stress transmission between the fastener 4 and the wall material concrete of the wall material 1. As a result, the yield strength of the fastener 4 against bending and shearing force due to lateral force can be improved, and the pull-out prevention performance thereof can be improved. Since the horizontal bar 12 can be used as a fixing bar for the fastener 4 with respect to the lateral force, the amount of additional bar arrangement can be reduced. Further, since the horizontal bar 12 extends in the entire width direction of the wall material 1, the maximum fixing length can be secured.

  Further, by providing the reinforcing bars 5, the horizontal bars (5, 12) have a two-stage structure around the fastener 4, and the stress transmission of the lateral force between the fastener 4 and the wall material concrete of the wall material 1 is performed. This can be further improved. Since a part of the reinforcing bar 5 is inserted through the fixing plate 43, the stress transmission of the lateral force is further improved.

  Moreover, the upper and lower horizontal bars (5, 12) are restrained by the restraint bars 6 and the wall material 1 can be prevented from being broken off from the fastener 4.

  Further, the fixing bars 44 and 45 are extended downward from the fixing plate 43 or the main body plate 41, so that the fixing force of the fastener 4 to the wall material 1 can be improved, and the supporting strength can be improved.

  The main body plate 41, the fixing bracket 42, the fixing plate 43, and the ribs 48a and 48b are based on plate materials. Therefore, when these are joined by welding, it is possible to reduce the cost by assembling by partial penetration welding and fillet welding. It becomes easy to ensure the quality of welding while aiming.

  In addition, although the case where the upper and lower wall materials 1 and 2 and the building frame 3 were connected was demonstrated in the said embodiment, the fastener 4 can also be used for the connection of one wall material and the building frame 3. FIG. . In this case, for example, in the configuration of the fastener 4, a configuration for connecting the upper wall material (the wall material 2 in the above embodiment) is unnecessary.

A connection structure, 1 wall material, 4 fastener, 41 body plate, 42 fixing hardware, 43 fixing plate, insertion portion 431, lateral stripe 12

Claims (3)

A connecting structure for connecting a precast concrete wall material and a building frame with a fastener,
The fastener is
A body plate fixed to the wall material;
A fixing hardware projecting from the main body plate to the building skeleton side and joined to the building skeleton;
And a fixing plate that protrudes from the main body plate to the wall material side and extends in the vertical direction, and is embedded in the wall material,
The wall material is
A transverse line extending in the width direction of the wall material;
In the fixing portion of the fastener, comprising reinforcing bars extending in the width direction of the wall material,
The fixing plate is
A first insertion portion through which the transverse muscle is inserted ;
A second insertion part through which the reinforcing bar is inserted,
In the wall material, the region including the fixing part is thicker than other regions,
The reinforcing bars are located closer to the main body plate in the thickness direction of the wall material than the lateral bars,
A connecting structure characterized by that. The connection structure according to claim 1 ,
And further comprising a plurality of restraining bars surrounding the reinforcing bars and the horizontal bars of the wall material,
A connecting structure characterized by that. A wall material made of precast concrete with a fastener,
A transverse line extending in the width direction of the wall material;
In the fixing portion of the fastener, comprising reinforcing bars extending in the width direction of the wall material,
The fastener is
A body plate fixed to the wall material;
Projecting from the main body plate on the opposite side to the wall material, a fixing hardware to be joined to the building frame,
Projecting from the main body plate to the wall material side, and including a fixing plate embedded in the wall material,
The fixing plate is
A first insertion portion through which the transverse muscle is inserted ;
A second insertion part through which the reinforcing bar is inserted,
In the wall material, the region including the fixing part is thicker than other regions,
The reinforcing bars are located closer to the main body plate in the thickness direction of the wall material than the lateral bars,
A wall material characterized by that.

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