JP2008274573A - Column and beam joint metal and column and beam joint structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a column and beam joint metal, restraining sink deformation, and enabling movement of a column. <P>SOLUTION: This column and beam joint metal fixture 10 is formed by sticking two steel plates to be integrated with each other by fillet welding. The column and beam joint metal fixture 10 is fitted to be held between the end face of the column 2 (2A or 2B) and the top face or the lower face of a beam 3, and a first screw member and a second screw member are screwed into the column 2 and the beam 3 through a through hole provided in the column and beam joint metal fixture 10 to join the column 2 and the beam 3 to each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a column beam joint for joining columns and beams in a wooden building and a column beam joint structure using the same, and in particular, column beam joints that can suppress indentation and can easily change the column position. The present invention relates to a bracket and a column beam connection structure.

  Various proposals have been made for the joint structure of columns and beams in wooden buildings. For example, as shown in FIG. 1, a T-shaped steel plate fitting 1 is attached to the side surface of the joint between the column 2 and the beam 3 and fixed to the side surface of the column 2 and the beam 3 with a fastening member such as a nail, bolt or screw. The column 2 and the beam 3 are joined (attached steel plate joining).

Further, as in Patent Document 1 below, a vertically long through groove is provided in each of the column and the beam, and a metal or resin joint fitting is inserted therein, and a fastening member such as a pin is inserted from the side of the column and the beam. With that, the column and the beam are joined.
JP 2006-312819 A

  However, when the cross section of the column is joined to the side surface of the beam, deformation due to penetration into the side surface of the beam occurs. In the joint structure in which the joint fitting is fixed from the side surface of the pillar or beam with a fastening member such as a nail or a screw, as in the above-described prior art, the indentation deformation is not sufficiently considered. Insufficient penetration strength is borne by fastening members such as nails and bolts, but if the amount of deformation of the beam-column joint is increased due to the generation of secondary stress, cracking of the wood may occur. In particular, when the fastening member is driven (or screwed) from both sides in the weak axis direction of the column or beam, cracks are more likely to occur than when the fastening member is driven (screwed) in the strong axis direction.

  Further, as shown in FIG. 2A, when using the T-shaped steel plate joining member 1 fixed to the side surfaces of the column 2 and the beam 3, the width of the column 2 and the beam 3 is made the same, and the step on the mounting surface 2 (b), the T-type steel plate joining member 1 cannot be used when the width of the column 2 is different from that of the beam and there is a step on the mounting surface. FIG. 2 is a view as seen from the cross-sectional side of the beam 3.

  In addition, after completion of a wooden building, it may be easier to use if the position of the column is changed by changing the application, etc.However, once the column and beam are fixed with existing joint fittings, it is not possible to move the column. Very cumbersome and difficult. In particular, when it is necessary to provide in advance a groove or hole for attaching a joint fitting to a pillar or beam, it is impossible to move the pillar and join it to the beam at another position.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a beam / column joint and a beam / column joint structure using the same, which suppresses indentation deformation and enables the column to move.

  In order to achieve the above object, the first configuration of the beam-to-column fitting according to the present invention is a column-beam fitting for joining an end surface of a column and an upper surface or a lower surface of the beam. A plate-like shape having a beam side surface in contact with each other, a column side surface having a first portion that is opposite to the beam side surface and that contacts the end surface of the column, and a second portion that does not contact the end surface of the column A first through hole penetrating the beam side surface and the first portion of the column side surface, and a second through hole penetrating the beam side surface and the second portion of the column side surface. Is provided, the second portion of the column side surface is brought into contact with the end surface of the column, and the first screw member is screwed from the beam side surface to the end surface of the column through the first through hole, The beam-column joint is fixed to the column and the beam-to-column connection fixed to the column. The beam side surface of the metal fitting is brought into contact with the upper surface or the lower surface of the beam, and a second screw member is screwed into the upper surface or the lower surface of the beam from the second portion of the column side surface through the second through hole. Thus, the column beam joint fitting is fixed to the beam, and the first through hole can be embedded in the first through hole without protruding the head of the first screw member from the side surface of the beam. An opening having a diameter and a depth, and a thickness between the beam side surface and the first portion of the column side surface is thicker than between the beam side surface and the second portion of the column side surface, and the opening The thickness is such that the portion can be drilled.

  A second configuration of the beam-column joint according to the present invention is the first configuration, wherein the first through hole has a surface area of the beam side surface and includes the opening, and the second penetration. A first plate provided with a hole, and a remaining portion of the first through hole having a surface area of the second portion of the column side surface and connected to a part of the first through hole. The first plate and the second plate are bonded together by fillet welding.

  A third configuration of the beam-column joint according to the present invention is characterized in that, in the first configuration, the beam side surface has a shape that is wider than a cross-sectional area of the column and narrower than the width of the beam. To do.

  According to a fourth configuration of the column beam joint metal according to the present invention, in the first configuration, the first screw member and the second screw member are lag screws.

  The column beam connection structure in the present invention is a column beam connection structure in which an upper surface or a lower surface of a wooden beam and an end surface of a column are bonded to each other, and a column beam connection bracket is provided between the upper surface or the lower surface of the column and the end surface of the column. Are arranged so as to be sandwiched, and the column-beam joint includes a beam side surface that contacts the upper surface or the lower surface of the beam, and a first portion that is opposite to the beam side surface and contacts the end surface of the column. A plate-like member having a column side surface having a second portion that does not come into contact with the end surface of the column, the first through hole penetrating the beam side surface and the first portion of the column side surface And a second through-hole penetrating the beam side surface and the second portion of the column side surface, the second portion of the column side surface abutting against a cross section of the column, and a first screw member Screwing from the side of the beam into the end face of the column through the first through hole The beam-to-column fitting is fixed to the column, the beam side surface of the beam-to-column fitting fixed to the column is brought into contact with an upper surface or a lower surface of the beam, and a second screw member is attached to the column side surface. The second beam portion is fixed to the beam by being screwed into the upper surface or the lower surface of the beam through the second through hole, and the first through hole is fixed to the first through hole. An opening having a diameter and a depth that can be embedded in the first through-hole without protruding the head of the screw member from the side surface of the beam, and between the first part of the beam side surface and the column side surface Is thicker than the second portion of the beam side surface and the column side surface, and is a thickness capable of drilling the opening.

  According to the column beam joint metal fitting of the present invention, since the surface area of the surface in contact with the beam is larger than the surface area of the end surface of the column, the indentation deformation can be suppressed. Moreover, a pillar can be easily moved by setting it as the structure which can remove the screw member screwed into the beam easily.

  Embodiments of the present invention will be described below with reference to the drawings. However, such an embodiment does not limit the technical scope of the present invention.

  FIG. 3 is a diagram showing a column beam joint structure joined by the column beam joint metal according to the embodiment of the present invention. FIG. 3A shows an end of the beam 3 by the column beam joint metal 10 according to the present invention. FIG. 3 (b) shows a state in which the intermediate portion other than the end portion of the beam 3 and the column 2B are bonded by the column beam connecting bracket 10 of the present invention. It is a figure which shows a state. In the following, the column beam joint fitting 10 for the column 2A to be joined at the end of the beam 3 will be described with reference to FIGS. 4 and 5, and the column for the column 2B to be joined at an intermediate portion other than the end of the beam 3. The beam joining bracket will be described with reference to FIGS. In addition, when not distinguishing the pillar 2A and the pillar 2B, it describes only as "the pillar 2".

  FIG. 4 is a view showing a state in which the column 2A and the beam 3 are joined by the column-beam joint 10 for the column 2A joined at the longitudinal direction end of the beam 3. As shown in FIG. FIG. 5 shows a beam side view (a), a front view (b), a column side view (c), and a side view (d) of the column beam joint fitting 10 for the column 2A.

  In the present invention, a beam-to-column fitting 10 is provided in which two steel plates 10A and 10B are bonded together by fillet welding and formed integrally. The beam-to-column fitting 10 is attached so as to be sandwiched between the end surface of the column 2A and the upper surface or the lower surface of the beam 3, and a lag screw 20 is attached to each of the columns 2A and 3 through a through hole provided in the beam-to-column fitting 10. By being screwed in, the pillar 2A and the beam 3 are joined. A lag screw is also called a lag bolt or a coach screw.

  The size (surface area) of the steel plate 10A and the steel plate 10B is different. Specifically, the steel plate 10A has a larger surface area than the cross-sectional area of the pillar 2A, and the steel plate 10B has a smaller surface area than the steel plate 10A. By attaching the steel plate 10A and the steel plate 10B having a smaller surface area, a thick portion and a thin portion are formed in the column beam joint fitting 10 as illustrated. That is, the portion where the steel plate 10A and the steel plate 10B are bonded is thicker than the portion of only the steel plate 10A, and the thick portion where the steel plate 10A and the steel plate 10B are bonded contacts the column 2A. The reason why the surface areas of the steel plate 10A and the steel plate 10B are made different is to integrate the steel plate 10A and the steel plate 10B by fillet welding, and by configuring the steel plate 10A and the steel plate 10B to be bonded, as described later. In addition, an opening for embedding the head of the lag screw 20 </ b> A to be screwed into the column 2 </ b> A in the through hole of the column beam joint fitting 10 can be easily formed. In addition, in the column beam joint metal 10, the surface on the steel plate 10A side and abutting on the beam 3 is a beam side surface, and the surface on the steel plate 10B side and abutting on the column 2A is a column side surface.

  The through hole 11A for the lag screw 20A screwed into the column 2A is provided in a thick portion where the steel plate 10A and the steel plate 10B are bonded together. On the other hand, the through hole 11B for the lag screw 20B screwed into the beam 3 is provided in a portion (thin portion) of the steel plate 10A where the steel plate 10B is not bonded. Moreover, the through-hole 11B has a diameter that is smaller than the diameter of the head of the lag screw 20B and through which the body portion and the screw portion of the lag screw 20B can pass.

  The through-hole 11A has a first portion (opening) 11A-1 having a diameter larger than the diameter of the head of the lag screw 20A, a diameter smaller than the diameter of the head of the lag screw 20A, and a body portion and a screw portion of the lag screw 20A. It consists of 2nd part 11A-2 which has a diameter which can penetrate. The first portion (opening) 11A-1 of the through hole 11A is provided on the steel plate 10A (beam side surface), the second portion 11A-2 is provided on the steel plate 10B (column side surface), and the first portion 11A-1 and the first portion The steel plate 10A and the steel plate 10B are bonded together so that the central axes of the two portions 11A-2 coincide. When the steel plate 10A thicker than the head of the lag screw 20A is used and the hole corresponding to the first portion 11A-1 of the through hole 11A is provided in the steel plate 10A, the lag screw 20A is screwed into the column 2A from the through hole 11A. In addition, the head of the lag screw 20A is embedded in the opening of the through hole 11A. That is, since the lag screw 20A does not protrude on the surface (beam side surface) on the side where the beam-to-column fitting 10 contacts the beam 3, the beam 3 is placed on the beam-to-column fitting 10 fixed to the column 2A by the lag screw 20A. Can be placed as is.

  A tip hole into which the lag screw 20A is screwed is provided in advance on the end surface of the column 2A on which the beam-to-column fitting 10 abuts, and the beam-to-column fitting is aligned with the through hole 11A of the beam-to-column fitting 10. The column side joint 10 is fixed to the column 2A by bringing the column side surface 10 into contact with the end surface of the column 2A and screwing the lag screw 20A into the column 2A from the beam side side through the through hole 11A. Note that a plurality of through holes 11A are preferably provided, and an example in which two through holes 11A are provided is shown in the figure.

  The column-beam joint fitting 10 fixed to the column 2A is subsequently fixed to the beam 3. A tip hole into which the lag screw 20B is screwed in a predetermined position on the upper surface or the lower surface of the beam 3 is provided in advance, and the beam side surface of the beam-to-column fitting 10 is aligned with the through-hole 11B of the beam-to-column fitting 10. The beam-to-column fitting 10 is fixed to the beam 3 by abutting the upper surface or the lower surface of the beam and screwing the lag screw 20B into the beam 3 from the column side surface through the through hole 11B. A plurality of through holes 11B are preferably provided, and an example in which two through holes 11B are provided is shown in the figure.

  Since the beam 3 is placed on the head of the lag screw 20A in the state in which the column 2A and the beam 3 are joined by the column-beam joining bracket 10, the lag screw 20A cannot be seen, but the lag screw 20B The head is exposed from the column side surface of the column beam joint fitting 10.

  FIG. 6 is a diagram showing a state in which the column 2B and the beam 3 are joined by the column-beam joining bracket 10 for the column 2B that is joined at an intermediate portion other than the longitudinal end portion of the beam 3. FIG. 7 shows a beam side view (a), a front view (b), a column side view (c), and a side view (d) of the column beam joint fitting 10 for the column 2B.

  The column beam joint 10 for the column 2B has substantially the same configuration as the column beam joint 10 for the column 2A shown in FIGS. 4 and 5, and the through hole 11B for the lag screw 20B screwed into the beam 3. Is different in that it is provided on both sides of the through hole 11A for the lag screw 20A screwed into the column 2B. Unlike the column 2A located at the end portion of the beam 3, the column 2B is joined at an intermediate portion other than the end portion in the longitudinal direction of the beam 3, so that the column beam joint metal 10 penetrates both sides of the through hole 11A. It has a hole 11B and is joined to the beam 3. The positions and the diameters of the through holes 11A and 11B are the same as those of the column beam joint fitting 10 for the column 2A described above. The point formed by the steel plate 10A and the steel plate 10B is also the same.

  The number of through-holes 11A and 11B (that is, the number of lag screws to be driven) is appropriately determined based on the structural calculation, but it is preferable to reduce the number as much as possible in consideration of cracks in wood. That is, it is preferable to use a screw member having an allowable yield strength as large as possible. In this respect, the lag screw is the optimum screw member, but the use of screw members other than the lag screw is not excluded.

  As described above, by connecting the column 2 and the beam 3 in such a manner that the column beam connecting bracket 10 is sandwiched between the end surface of the column 2 and the upper surface or the lower surface of the beam 3 and the lag screw is screwed up and down, This produces the effect. That is, in the column-beam joint 10, the steel plate 10A that contacts the upper surface or the lower surface of the beam 3 has a surface area larger than the cross-sectional area of the column 2A, so that the end surface of the column 2A directly contacts the upper surface or the lower surface of the beam 3 As compared with the above, the compression area is enlarged, and it is possible to suppress the indentation deformation.

  Moreover, since the head of the lag screw screwed into the column is embedded in the column beam joint fitting 10, it is not necessary to perform a process of providing a recess for storing the head on the beam 3 side. In addition, it is necessary to provide a tip hole beforehand in the position which screws in a lag screw.

  Furthermore, the column beam joint metal fitting 10 is disposed so as to be sandwiched between the column and the beam, and a lag screw is screwed downward (or upward) with respect to the end surface of the column instead of the side surface of the column, and the upper surface or the lower surface of the beam. On the other hand, the lag screw is screwed upward (or downward). Thereby, the column beam connection by the column beam bonding metal fitting 10 becomes pin connection, and generation of secondary stress can be reduced.

  Since the lag screw is screwed into the strong shaft on the side surface of the beam, cracking of the beam is less likely to occur compared to the case where the lag screw is screwed into the weak shaft.

  Further, since the lag screw screwed into the beam is exposed, the column can be easily removed from the beam by removing the lag screw screwed into the beam. Thereby, when it is desired to change the position of the column due to a change in the situation such as a change in the usage of the room, the column can be easily moved within a range allowable by the structural calculation. In addition, the column can be easily attached to the beam.

  FIG. 8 is a diagram illustrating an example of column transfer. For example, as shown in FIG. 8 (a), when it is desired to change the position of the column joined to the joint portion 100 of the beam, the joint portion 100 is removed within the range allowable by structural calculation by removing the pillar joined to the joint portion 100. Shift to one of the left and right sides of the, and add another pillar on the opposite side. In addition, as shown in FIG. 8B, when a column is joined to a long beam without a joint, it can be moved within a range allowed by structural calculation.

  In the above-described embodiment, the beam-to-column fitting 10 of the present invention is formed by bonding the steel plates 10A and 10B, but is formed by processing a single steel plate into the shape shown in FIGS. Also good. However, by attaching the steel plates 10A and 10B to form the column beam joint fitting 10 of the present invention, the column beam joint fitting 10 can be easily and inexpensively formed.

It is a figure which shows the example of the conventional column beam joining metal fitting. It is a figure explaining the case where the width | variety of a pillar and the width of a beam differ. It is a figure which shows the beam-column joining structure joined by the beam-column joining metal fitting in embodiment of this invention. It is a figure which shows the state by which the pillar 2A and the beam 3 are joined by the column beam joining metal fitting 10 for the pillar 2A joined at the longitudinal direction edge part of the beam 3. FIG. They are a beam side view (a), a front view (b), a column side view (c), and a side view (d) of the column beam joint fitting 10 for the column 2A. It is a figure which shows the state by which the column 2B and the beam 3 are joined by the column beam joining metal fitting 10 for the columns 2B joined in the intermediate part other than the longitudinal direction edge part of the beam 3. FIG. FIG. 7 is a beam side view (a), a front view (b), a column side view (c), and a side view (d) of the column beam joint 10 for the column 2B. It is a figure which shows the example of transfer of a pillar.

Explanation of symbols

  2: Column, 3: Beam, 10: Column beam joint metal, 10A: Steel plate, 10B: Steel plate, 11A: Through hole, 11B: Through hole, 20A: Lug screw, 20B: Lug screw

Claims (5)

In the column beam joint for joining the end face of the column and the upper surface or the lower surface of the beam,
A beam side surface that contacts the upper surface or the lower surface of the beam; a first portion that is opposite to the beam side surface and contacts the end surface of the column; and a second portion that does not contact the end surface of the column A plate-like member having a column side surface,
A first through hole penetrating the beam side surface and the first portion of the column side surface and a second through hole penetrating the beam side surface and the second portion of the column side surface are provided,
The second portion of the column side surface is brought into contact with the end surface of the column, and the first screw member is screwed into the end surface of the column from the beam side surface through the first through hole. The bracket is fixed to the column, the beam side surface of the column beam joint bracket fixed to the column is brought into contact with the upper surface or the lower surface of the beam, and the second screw member is moved from the second portion of the column side surface. By screwing into the upper surface or the lower surface of the beam through the second through hole, the column beam joint bracket is fixed to the beam,
The first through-hole has an opening having a diameter and a depth that can be embedded in the first through-hole without protruding the head of the first screw member from the beam side surface, A thickness between the beam side surface and the first portion of the column side surface is thicker than a portion between the beam side surface and the second portion of the column side surface, and is a thickness capable of drilling the opening. Column beam joint fitting. In claim 1,
The first plate having the surface area of the beam side surface and including the opening, the first plate provided with the second through hole, and the surface area of the second portion of the column side surface And a second plate provided with a remaining portion of the first through hole connected to a part of the first through hole, and the first plate and the A beam-to-column fitting, wherein the second plate is bonded by fillet welding. In claim 1,
The beam-beam joint fitting according to claim 1, wherein the beam side surface has a shape that is wider than a cross-sectional area of the column and narrower than a width of the beam. In claim 1,
The first and second screw members and the second screw member are lag screws. In the column beam joint structure that joins the upper or lower surface of the wooden beam and the end surface of the column,
It is arranged so that a column beam joint fitting is sandwiched between the upper surface or the lower surface of the column and the end surface of the column,
The beam-to-column fittings are not in contact with the end surface of the column and the beam side surface that contacts the upper surface or the lower surface of the beam, the first surface that is the opposite surface of the beam side surface and that contacts the end surface of the column. A plate-like member having a column side surface having a second portion,
A first through hole penetrating the beam side surface and the first portion of the column side surface and a second through hole penetrating the beam side surface and the second portion of the column side surface are provided,
The second portion of the column side surface is brought into contact with the cross section of the column, and the first screw member is screwed from the beam side surface to the end surface of the column through the first through hole, thereby the column beam connection. The bracket is fixed to the column, the beam side surface of the column beam joint bracket fixed to the column is brought into contact with the upper surface or the lower surface of the beam, and the second screw member is moved from the second portion of the column side surface. By screwing into the upper surface or the lower surface of the beam through the second through hole, the column beam joint bracket is fixed to the beam,
The first through-hole has an opening having a diameter and a depth that can be embedded in the first through-hole without protruding the head of the first screw member from the beam side surface, A thickness between the beam side surface and the first portion of the column side surface is thicker than a portion between the beam side surface and the second portion of the column side surface, and is a thickness capable of drilling the opening. Column beam connection structure.

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