JP5826719B2 - Beam-column connection structure - Google Patents

Description

  The present invention relates to a joint structure between a beam and a column of a building.

As the joint structure between the beam and the column, as shown in Japanese Patent Laid-Open No. 11-193572, an angle metal fitting having a substantially L shape is provided along the inner periphery of the corner of the beam placed on the top of the column. And was fixed with screws. Thereby, the joining state of the beam and the column was maintained.

Japanese Patent Laid-Open No. 11-193572

When the size of the beam increases, the bending moment at the joint with the column increases accordingly, which causes a problem that the beam breaks in the longitudinal direction. Therefore, there was one that used a long metal fitting to penetrate the beam up and down to reach the column and fixed both, but because it was formed long, the cost for the connecting metal fitting increased and the construction was also It became difficult.
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a beam-column connection structure that can prevent breakage of the beam, maintain a robust bonded state between the beam and the column, and can be easily constructed. .

  The present invention includes a beam, a column, a lag screw, a connecting member, a beam outer peripheral side bolt, a column joint side bolt, and a fastener, and the beam penetrates from the beam outer peripheral side to the column joint side. A through hole is provided, and the column is provided with a column side through hole at a position coincident with the beam side through hole when the column is joined to the beam, and the column bottom through hole opens to the outside of the column. The fastener insertion port is provided, and the lag screw has insertion holes for the beam outer peripheral side bolt and the column joint side bolt, and the beam outer side of the beam side through hole and the hole inlet and the column side through of the column joint side. Each of the connecting members is connected to the beam outer periphery side bolt and the column connection side bolt, and is connected to the beam outer side of the beam side through hole and the hole entrance on the column connection side, respectively. In the state located between the screwed lag screws, the beam side through hole can be rotated concentrically with the beam outer periphery side bolt The outer periphery side bolt of the beam has a connecting portion at one end of the bolt in the longitudinal direction, and is inserted into an insertion hole of a lag screw screwed into the beam. Has a connecting portion, is inserted into the insertion hole of the lag screw screwed into the column, and by connecting the connecting portion of the beam outer peripheral side bolt and the column joining side bolt to the connected portion of the connecting material, The beam outer side bolt, the column joint side bolt, and the connecting material are continuous from the beam outer side of the beam to the column fastener insertion port, and the fastener is connected to the beam outer side of the beam outer bolt and the fastener insertion port. It is characterized in that it is inserted and fastened to the connecting portion on the column side of the column joining side bolt.

  According to the present invention, the beam side through hole is provided in the beam, the column side through hole is provided in the column, and the lag screw is screwed into the hole entrance of each of the beam side through hole and the column side through hole. A bolt and a column joining side bolt are connected to a connecting material, and a nut is inserted into a fastener insertion port at a hole bottom portion of the column side through hole to be fastened from both sides of the beam and the column. As a result, even when a large beam is joined to a column, the beam outer-bolt bolt fastener and the column joint-side bolt fastener that are locked to the lag screw draw the connecting material respectively, so that the beam The beam and the column can be firmly joined by being compressed from the outer peripheral side and the column joining side. Furthermore, since it is possible to use a combination of a plurality of relatively short connection fittings used in general buildings, conventionally, it is necessary to use a long and robust connection fitting corresponding to a relatively large building such as an apartment house. Therefore, the cost can be reduced. Moreover, since a relatively short metal fitting is used in combination, the construction labor is greatly facilitated as compared with a conventional fastening method using a long connecting metal fitting.

It is the longitudinal cross-sectional view which expanded the principal part of the joining structure of the beam by this implementation. It is a longitudinal cross-sectional view which expands and shows A in FIG. It is the perspective view which expanded the principal part which shows the state of the pillar by this implementation. It is the perspective view which expanded the principal part which shows the state of the beam by this implementation. It is the simplified principal part expanded sectional view which shows the construction procedure of the joining structure of the pillar and beam by this implementation.

Below, based on drawing, 1st embodiment of the junction structure of the beam and column by this invention is described.
As shown in FIGS. 1 and 2, the joint structure of the beam 1 and the column 2 according to the present embodiment includes the vertical column 2 and the beam 1 placed on the upper end of the column 2. The beam 1 and the column 2 will be described in detail later, but as shown in FIG. 2, a plurality of types of joint fittings (lag screw 3, beam outer peripheral side bolt 4, column joint side bolt 14, connecting material 5, nut (fastening) In addition, it is joined by 9).
In this embodiment, since the beam 1 is mounted on the column 2, the beam outer peripheral side is represented as the upper side, and the column joint side is represented as the lower side.

  The pillar 2 is made of laminated material. Referring to FIG. 2 and FIG. 3, pillar side through holes 6 are provided at four positions spaced apart in the upper end 2a. Moreover, the hole bottom part of the pillar side through-hole 6 is open | released to the side part outer peripheral side of the pillar 2, and the fastener insertion port 7 is provided in this side part outer peripheral side.

  2 and 4, the beam 1 has a substantially flat joining surface 1a that joins the upper end 2a of the column 2 and is further inclined upward in a direction away from the joining surface 1a. It grows. Further, the beam 1 according to the present embodiment is a large-sized beam whose vertical dimension on the side surface of the beam 1 exceeds 1200 mm. Further, the beam-side through-holes 8 penetrating vertically are provided at four positions spaced apart on the joint surface 1a of the beam 1 with the column 2 and the beam-side through-holes 8 connect the beam 1 and the column 2 to each other. It is provided at a position coinciding with the column side through hole 6 when abutting.

  As shown in FIG. 2, each of the fittings for joining the beam 1 and the column 2 includes the lag screw 3, the beam outer peripheral side bolt 4, the column outer side bolt 14, the connecting member 5, and a nut (fastener). 9. The lag screw 3 has a cylindrical shape having an insertion hole 3a into which the beam outer peripheral side bolt 4 and the column joining side bolt 14 are inserted, and a screw-like thread is cut on the outer peripheral side of the cylinder. Further, the lag screw 3 in the present embodiment has a beam inlet 8a on the beam outer side and a column inlet 8b on the column connection side of the beam side through-hole 8 provided at four positions of the beam 1, and in the present embodiment. Screwed into pillar side through holes 6 provided at four locations of the pillar 2. The column-joining bolt 14 has male screws 4a, 14a, 14b cut at both ends in the bolt longitudinal direction. The beam outer peripheral side bolt 4 has a bolt head (fastener) 15 at one end portion in the bolt longitudinal direction and a male screw (connecting portion) 4a at the other end portion. Further, the beam outer peripheral side bolt 4 is inserted into all the beam side through holes 8 of the beam 1, and the bolt head 15 of the beam outer peripheral side bolt 4 and the male screw 14 b of the column connection side bolt 14 are respectively connected to the beam 1. Exposed outside the pillar 2. The connecting member 5 has a cylindrical shape, and female screws (connected portions) 5a and 5b are cut at both end portions in the cylinder longitudinal direction. The female screws 5a and 5b of the connecting member 5 are formed so as to be connected to the male screws 4a of the beam outer peripheral side bolt 4 and the male screws 14a and 14b of the column joint side bolt 14 by screwing.

The construction procedure of the joint structure of the beam 1 and the column 2 according to the present embodiment configured as described above is performed as follows.
As a first procedure, as shown in FIG. 5A, a lag screw 3 is screwed into a hole entrance 8b on the column joint side of the beam side through hole 8 of the beam 1, and the column joint side is blocked by the lag screw 3. The connecting member 5 is inserted above the side through hole 8. Further, the lag screw 3 is screwed into the hole entrance 8 a on the beam outer peripheral side of the beam side through hole 8.
As a second procedure, as shown in FIG. 5B, the lag screw 3 is screwed into the pillar side through hole 6 provided in the top 2 a of the pillar 2. Further, the column joining side bolt 14 is inserted into the insertion hole 3 a of the lag screw 3 screwed into the column side through hole 6 of the column 2, and the joining surface 1 a of the beam 1 is placed on the tree mouth 2 a of the column 2. A nut 9 is inserted into the fastener insertion port 7 that communicates with the bottom of the column-side through hole 8, and is temporarily tightened to the nut 9 on a male screw 14 b below the column-joining bolt 14. Further, the beam outer peripheral side bolt 4 is inserted into the insertion hole 3 a of the lag screw 3 screwed into the beam outer peripheral side surface of the beam 1, and the male screw 4 a of the beam outer peripheral side bolt 4 is screwed into the female screw 5 a of the connecting member 5. .
As a third procedure, as shown in FIG. 5C, by tightening the bolt head 15 of the beam outer periphery side bolt 4, the beam outer periphery side bolt 4 and the nut 9 inserted into the fastener insertion port 7 All of the connecting material 5 is tightened. As a result, the beam outer peripheral side bolt 4 and the connecting member 5 are connected in series, so that the beam outer peripheral side bolt 4 is pulled toward the beam outer peripheral side and the column joint side bolt 14 is pulled toward the column joint side. The column 2 is fixed in a compressed state between the bolt head 15 and the nut 9.

  By joining the beam 1 and the column 2 according to the present embodiment as described above, when joining a column 2 with a large size in which the vertical dimension of the beam 1 exceeds 1200 mm as in the embodiment In addition, it is possible to prevent the beam 1 from cracking in the longitudinal direction and to join the beam 1 and the column 2 robustly without using a long connecting fitting that reaches the predetermined position of the column 2 from the upper end of the beam 1. become. Specifically, the pulling strength is obtained by embedding the lag screw 3 in a state where the beam 1 and the column 2 are abutted against each other at a position where they are joined. Further, the male screw 5a of the beam outer peripheral side bolt 4 is connected to the female screw 5a on the upper side of the connecting member 5 which is disposed between the lag screws 3 screwed up and down the beam 1 and inserted into the bolt outer peripheral side bolt through hole 8. Screw 4a is screwed in and connected. Further, the male screw 4a of the column joining side bolt 14 is screwed into and connected to the lower female screw 5b of the connecting member 5. Then, a nut 9 is inserted into the fastener insertion port 7 of the column 2 and temporarily tightened to the male screw 14 b provided on the column side of the column joining side bolt 14. Finally, by turning the bolt head 15 and tightening the nut 9, the beam outer peripheral side bolt 4 connected to the connecting member 5 is drawn toward the beam outer peripheral side, and the column joining side bolt 14 also connected to the connecting member 5 is It is drawn to the column joint side. Therefore, the beam 1 and the column 2 are joined in a compressed state, and the longitudinal cracking of the beam is prevented.

  The joint structure of the beam 1 and the column 2 of the present invention is not limited to that of the above embodiment. In the above embodiment, the beam 2 is placed on the column 2. However, the beam 1 may be bonded to the side surface of the column 2. The side is either left or right. Further, the dimensions of the beam 1 to which the joining structure of the main beam 1 and the column 2 is applied are variously changed by changing the lengths of the beam outer periphery side bolt 4, the column connection side bolt 14, and the connecting material 5. Can handle differences in dimensions. Furthermore, the lag screw 3 can be used in common for both the beam 1 and the column 2 because all the lengths used for the joining structure of the main beam 1 and the column 2 have substantially the same dimensions. Moreover, about the fasteners 9 and 15 which can be removed from the connecting portions 14a and 14b with separate members for fastening to the column joining side bolts 14, the fasteners 9 and 15 which are fastened to the beam outer periphery side bolts 4 are used. The beam outer peripheral side bolt 4 may be either integral or separate.

1 beam 2 column 3 lag screw 4 beam outer peripheral side bolt 4a, 14a, 14b male thread (connection part)
5 Connecting material 5a, 5b Female thread (connected part)
6 Column side through hole 7 Fastener insertion port 8 Beam side through hole 8a, 8b Hole entrance 9 Nut (fastener)
14 Column connection side bolt 15 Bolt head (fastener)

Claims (1)

Beam (1), column (2), lag screw (3), connecting material (5), beam outer peripheral side bolt (4), column joining side bolt (14), and fasteners (9, 15) )
The beam (1) is provided with a beam side through hole (8) penetrating from the beam outer peripheral side to the column joint side,
The column (2) is provided with a column side through hole (6) at a position coincident with the beam side through hole (8) when joined to the beam (1), and is formed at the bottom of the column side through hole (6). Is provided with a fastener insertion opening (7) that opens to the outside of the pillar (2),
The lag screw (3) has an insertion hole (3a) for the beam outer periphery side bolt (4) and the column connection side bolt (14), and is provided on the beam outer periphery side and the column connection side of the beam side through hole (8). Screwed into the hole entrance (8a, 8b) and the column side through hole (6),
The connecting member (5) has connected portions (5a, 5b) to which the beam outer peripheral side bolt 4 and the column connection side bolt (14) are connected, respectively, and the beam outer side of the beam side through hole (8) and the column connection. Inserted into the beam-side through hole (8) in a concentric manner with the beam outer periphery side bolt (4) in a state of being positioned between the lag screws (3) screwed into the side hole inlets (8a, 8b). Yes,
The beam outer peripheral side bolt (4) has a connecting portion (4a) at one end portion in the bolt longitudinal direction, and is inserted into the insertion hole (3a) of the lag screw (3) screwed into the beam (1). And
The column joining side bolt (14) has connecting portions (14a, 14b) on both sides and is inserted into the insertion hole (3a) of the lag screw (3) screwed into the column (2). By connecting the connecting portions (4a, 14a) of the side bolt (4) and the column joining side bolt (14) to the connected portions (5a, 5b) of the connecting member (5), the beam outer peripheral side bolt (4) And the column joint side bolt (14) and the connecting member (5) are continuous from the beam outer peripheral side of the beam (1) to the fastener insertion port (7) of the column (2).
The fasteners (9, 15) are inserted at the beam outer peripheral side end of the beam outer peripheral side bolt (4) and the connecting part (the column side of the column connecting side bolt (14) inserted from the fastener insertion port (7)). 14b) A beam-column joint structure characterized by being fastened to 14b).

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