JP2007198069A - Joint structure of column and beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of a column and a beam by which the beam can be joined firmly and in a well-settled manner to a side face of the column having a rear split by the intermediary of a joist hanger. <P>SOLUTION: A steel fastening member 5 having a plate width larger than a groove width of the rear split 11 is brought into contact with the side face of the column 10 having the rear split 11 in a manner of straddling the rear split 11. The fastening member 5 is fastened to the column 10 on both sides of the rear split 11 by bolts 46 penetrating substantially parallel to the rear split, and nuts 47. The joist hanger 3 is fastened by the nuts 47 to connecting bolts 53 protruding from the fastening member 5. The column 10 and the beam 2 are joined to each other by the intermediary of the joist hanger 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joint structure between a pillar and a beam in a wooden structure, and more particularly, to a structure that joins a pillar and a beam to which a spine is applied via a hardware.

  A support material used as a structural material for a wooden building is often used with a back split in advance in order to prevent cracks due to drying. When joining such a column with a back split and a beam or other horizontal member, it may interfere with the fitting hardware.

  FIG. 4 is an example of a typical beam receiver 3 used for joining the end of the beam 2 to the side surface of the column 1 and a joining structure thereby. The beam receiver 3 is formed in a U-shape as viewed from above by extending a pair of beam receiving plates 32 on both side edges of the column mounting piece 31. The column mounting piece 31 is fastened to the side surface of the column 1 by bolts 41 and nuts 42 penetrating the column 1, and the beam receiving plate 32 is inserted into two slits 21 formed at the end of the beam 2, and the beam 2 Are connected to the beam by bolts 43, nuts 44, drift pins 45, and the like penetrating them. Such a beam receiver 3 is also disclosed in, for example, Patent Document 1.

  As shown in FIG. 5, when the beam receiver 3 is attached to the side surface of the column 10 to which the spine 11 is applied, the bolt 41 for fastening the column attachment piece 31 to the column 10 is Overlap, the fastening force of the bolt 41 and nut 42 acts in the direction of pushing the spine 11 open, so that sufficient mounting strength is not exhibited.

However, within the scope investigated by the present applicant, only Patent Documents 2 and 3 have been found with respect to the technology for attaching the joint metal to the structural material that has been split apart, and the fitting and strength are satisfied with respect to the column beam joint. It is thought that the hardware and joining technology to be obtained have not been proposed yet.
JP 2001-271426 A Japanese Utility Model Publication No. 2-13601 JP 2002-188213 A

  In view of the circumstances as described above, the present invention provides a beam-to-column connection structure in which a beam can be firmly and well connected to a side surface of a column that has been split back via a beam receiver. In the present invention, all the upright structural materials are generically referred to as “columns”, and the overall structural materials laid substantially horizontally between the columns are collectively referred to as “beams”.

  In order to achieve the above-described object, the beam-to-column connection structure of the present invention is configured such that a steel fastener member having a plate width larger than the groove width of the back split is straddled across the back split on the side face of the post-split pillar. The fastener member is fastened to the column with bolts and nuts that pass through both sides of the spine substantially parallel to the spine, and the beam receiver is fastened to the connecting bolt protruding from the fastener member. It is characterized in that a column and a beam are joined through a receiving object.

  Furthermore, the column beam connection structure of the present invention is characterized in that a notch is formed on the side surface of the column on which the spine is formed, and a fastener member is embedded in the notch.

  Further, in the beam-column joint structure of the present invention, the fastener member has a substantially rectangular back plate and a reverse T-shaped front plate in front view, which are superposed and fixed together, and a plurality of fastener members are provided on both sides of the back plate. The bolt holes are formed in two rows in the vertical direction, and a plurality of connecting bolts are fixed to the back plate or the front plate and protruded at the center.

  According to the column beam connection structure of the present invention configured as described above, the fastener member that is mounted across the spine is fastened to the column by bolts and nuts that penetrate both sides of the spine, and restrains the opening and closing of the spine. To firmly hold the joint area. Then, since the beam receiver is fastened to the connecting bolt protruding from the fastener member, the beam receiver can be well accommodated in the same manner as the pillar without the back, and the strength of the joint portion is sufficiently secured.

  If such a column beam connection structure is employed, for example, in a large-span wooden building mainly composed of laminated timber, it is possible to perform the construction of the large black pillar made of cypress and zelkova lumber.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view showing a column beam connection structure of the present invention. A back split 11 is applied to the column 10, and the beam 2 is joined to the side surface to which the back split 11 is applied via a fastener member 5 and a beam receiver 3.

  The fastener member 5 is a steel member having a substantially plate shape, and is configured by integrating a back plate 51, a front plate 52, and a plurality (five in the illustrated embodiment) of connecting bolts 53.

  The back plate 51 is substantially rectangular when viewed from the front, has a plate width sufficiently larger than the groove width of the spine 11, and has a plurality of bolt holes 54 formed in two rows in the vertical direction on both sides thereof.

  The front plate 52 has an inverted T-shape when viewed from the front, the plate width of the vertically long central portion 55 is about 1/3 of the plate width of the back plate 51, and the plate width of the lower portion 56 is about the same as the plate width of the back plate 51. And is overlaid on the back plate 51. As shown in FIG. 2, the front plate 52 is formed so as to be slightly higher in height than the back plate 51, and when the front plate 52 is overlapped with the back plate 51, a portion protruding upward and downward is filleted from the back side. The back plate 51 is fixed by welding (W1). The thicknesses of the back plate 51 and the front plate 52 according to the exemplary embodiment are 6 mm and 9 mm, respectively.

  The connecting bolt 53 is formed of a cutting bolt of about M16. As shown in FIG. 2, the connecting bolt 53 is inserted into a through hole 57 formed in the central portion 55 of the front plate 52 and into a female screw hole 58 formed in the back plate 51. It is screwed and fixed to the back plate 51 by flare welding (W2) from the back side of the back plate 51. The exemplary embodiment is such that the welds are not exposed on the front and back surfaces of the fastener member 5 by such a welding technique, but the welding technique for fixing the members together is not necessarily limited thereto. It is not a thing.

  The beam receiver 3 is the same as the conventional general one shown in FIG. 4, and has a column mounting piece 31 having a rectangular shape in front view and a pair of beam receiving plates 32 extending from both side edges. . A through hole (not shown) for inserting the connecting bolt 53 of the fastener member 5 is formed in the column attachment piece 31.

  As shown in FIG. 3, the fastener member 5 is applied to the side surface of the pillar 10 on which the spine 11 is applied so as to straddle the spine 11 and penetrates both sides of the spine 11 substantially parallel to the spine 11. 46 and the nut 47 are fastened to the column 10. Thereby, opening and closing of the spine 11 is restrained, and the column beam joint part is firmly held. In the illustrated embodiment, a frontal rectangular notch 12 that matches the fastener member 5 is formed on the side surface of the column 10 on which the spine 11 is formed, and the fastener member 5 is embedded and attached to the notch 12. Thus, consideration is given so that the fastener member 5 is not exposed to the outside. Also, a counterbore 13 is formed on the side surface opposite to the fastener member 5 to embed the head of the bolt 46.

  In this way, the beam receiver 3 is coupled to the fastener member 5 fixed to the column 10. This connection is an operation of inserting the through hole formed in the column attachment piece 31 of the beam receiver 3 into the connecting bolt 53 of the fastener member 5 and fastening the nut 48 between the beam receiving plates 32. This is the same as the attachment of the conventional beam receiver 3 and there is no special difficulty. The beam receiving plate 32 of the beam receiver 3 is inserted into two slits 21 formed at the end of the beam 2, and bolts 43 and nuts penetrating the beam 2 in the same manner as the conventional form shown in FIG. 4. 44, the drift pin 45, and the like.

  In addition, the end surface of the beam 2 shown in FIG. 1 is processed so that the lower part slightly protrudes to the column 10 side. The protrusion 22 ensures escape when the beam 2 is coupled to the beam receiver 3 so that the end surface of the beam 2 does not hit the bolt 46 and nut 47 that fasten the fastener member 5 to the column 10. When a load is applied to the beam 2, it comes into contact with the lower portion 56 of the front plate 52 of the fastener member 5 and acts to bear a bearing pressure on the lower portion 56 of the front plate 52.

  The present invention is not limited to the illustrated form, and can be implemented with some modifications to the form without departing from the function and action of the fastener member 5. For example, the back plate 51 and the front plate 52 may be processed with one member, or appropriate reinforcing ribs may be provided as long as they do not interfere with the joint surface between the column 10 and the beam 2. Further, the arrangement of the bolt holes 54 and the connecting bolts 53 may be changed according to the form of the beam receiver 3 used together, or the connecting bolts 53 may be fixed by welding to the front plate 52 instead of the back plate 51.

It is a disassembled perspective view which shows the beam-column joining structure which concerns on embodiment of this invention. It is a partial cross section side view of the fastener member which makes the principal part of this invention. It is a cross-sectional view of the joining location by the column beam joining structure of FIG. It is a disassembled perspective view which shows the column beam junction structure using the conventional beam receiver. It is explanatory drawing which shows the problem at the time of constructing the conventional beam receiving object to the pillar to which the back split was given.

Explanation of symbols

10 Pillar 11 Back split 12 Notch 2 Beam 3 Beam receiver 46 Bolt 47 Nut 48 Nut 5 Fastener member 51 Back plate 52 Front plate 53 Connecting bolt 54 Bolt hole

Claims (3)

  A steel fastener member with a plate width larger than the groove width of the back split is applied to the side of the pillar with the back split so as to straddle the back split, and bolts that penetrate both sides of the back split substantially parallel to the back split The fastener member is fastened to the column with a nut, the beam receiver is fastened with a nut to the connection bolt protruding from the fastener member, and the column and the beam are joined via the beam receiver. Column beam connection structure.   The column beam connection structure according to claim 1, wherein a notch is formed on a side surface of the column on which the spine is formed, and a fastener member is embedded in the notch.   The fastener member has a substantially rectangular back plate in front view and a front T-shaped front plate overlapped and fixed integrally, and a plurality of bolt holes are formed in two rows in the vertical direction on both sides of the back plate. The column beam connection structure according to claim 1, wherein a plurality of connecting bolts are fixed to and protruded from the back plate or the front plate at the center.

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