JP5008116B2 - Column beam connection structure in a wooden building and metal fittings for column beam connection used in the column beam connection structure - Google Patents

Description

  The present invention relates to a technique for joining a column material and a beam material used in a wooden building.

  In the conventional wooden frame structure, a structure that ensures seismic strength by the rigidity of the wall that uses bracing as a reinforcing material has been widely adopted. For this reason, since a wall structure that can ensure the desired seismic strength is required, the degree of freedom in layout, the position of the window, the size of the opening area, and the like are limited. In addition, the use of bracing has a problem in that, in addition to the material cost of the bracing and fixing metal fittings, it also takes time and labor to install the bracing. Furthermore, the fact that the wing plate bolt used as a means for joining the column member and the beam member cannot be expected to have a great reinforcing effect in terms of strength.

Therefore, in view of the above-mentioned problems, we developed a method for joining column materials and beam materials with a large holding force in the joined state, reducing the dependence on seismic strength based on the rigidity of the conventional wall, and flexibility in floor plan In addition, there has already been proposed a technique aimed at reducing restrictions on the position of the window, the size of the opening area, etc. (Patent Document 1).
JP 2001-115552 A

  In the column-beam joining method described in Patent Document 1, the upper and lower column-side joining brackets and the beam-side joining brackets, which are respectively installed on the column member and the beam member, are formed in a rack shape. By engaging the rack-shaped uneven portions of the metal fittings for joining, the pillar material and the beam material are joined together, and compared to the case of the conventional battledore bolt, a strong joined state can be obtained, and so on. It was an advantage.

  By the way, in this meshing state of the rack-shaped concavo-convex portions in this prior art, as illustrated in FIG. When the shaft center Cb is in an eccentric state spaced apart by a distance S and, for example, a tensile force is applied via the joining fittings A and B, the joining fitting A and the joining fitting B are meshed. The bending moment M acts on the portion and is added as an external force in a direction in which the metal fittings A and B are separated from each other. Therefore, due to the addition of the bending moment M, there is an effect that bending fracture occurs in the cross-sectional defect portion due to the insertion hole of the fixing bolt, or shear failure occurs in the screwed portion of the fixing bolt. There has been a technical problem that the original performance of the meshing joint between the metal fitting A and the joining metal fitting B is limited.

  Incidentally, as a means for solving the above problem, a countermeasure to increase the thickness of the cross-sectional defect portion by the fixing bolt insertion hole or to increase the number of fixing bolts can be considered. Not only does the shape become excessive and the cost increases, but also the weight of the metal fitting increases, which impairs the workability, and is not an effective solution for bending moments due to eccentricity.

The present invention has been developed in view of the above-described problems of the prior art, and eliminates the problem of bending moment based on the eccentricity between the axial centers of external forces acting on each joining metal fitting. The purpose of the present invention is to more rationally enhance the joint strength of the column beam joints without increasing the shape and reducing the workability due to an increase in weight, and to improve the workability .

In order to solve the above-mentioned problem, in the invention of claim 1, a column-side joining metal fitting connected to the column material side and a beam-side joining metal fitting connected to the beam material side are used. In a column-to-beam joint structure of a wooden building that joins a column member and a beam member through meshing coupling means formed of rack-like uneven portions formed on a joint surface, the column-side joining bracket and the column member connecting axis between the connecting axis between the beam-side joint for fitting and Harizai with is positioned on substantially the same line, consolidated the connection side toward the pillar from meshing coupling means of the pillar-side joining bracket A recess for the working space is formed, and an insertion hole is provided in the vertical wall on the column side forming the recess so as to be aligned with the connecting axis on the column side. line connecting work while positioned on substantially the same line as the connecting axis of the beam side through a provided with through holes Adopted the technology means that. Further, in the invention of claim 2, a column-side joining metal fitting connected to the column material side and a beam-side joining metal fitting connected to the beam material side are used and formed on the joining surface of these joining metal fittings. In a wooden beam-to-column metal fitting for joining a column and a beam to each other via a meshing connecting means comprising rack-like irregularities, the rack-like irregularities formed on the joining surfaces of the respective fittings The center height of the meshing portion composed of the portion is made to substantially coincide with the height of the connecting axis of the joining metal fitting and the column material or the beam material, and the column is made by the meshing coupling means of the column side joining metal fitting. A connection working space recess is formed near the connection side with the material, and the column-side vertical wall forming the recess is connected to the recess in a state of being aligned with the column-side connection axis . The technical means of providing a bolt insertion hole was adopted.

According to the column-beam joining structure and the column-beam joining bracket in the wooden building of the present invention, the coupling axis between the column-side joining bracket and the column member and the coupling axis between the beam-side joining bracket and the beam member are provided. Since they are positioned almost on the same line, it is possible to eliminate the bending moment based on the eccentricity between the axes of the external forces acting on the respective fittings, which was a drawback of the prior art. Therefore, since the bending action on the meshing joint between the joining metal fittings based on the bending moment is also eliminated, the original coupling strength of the meshing joint can be utilized, and the shape of the joining metal fitting itself can be excessive. Further, it is possible to reinforce the joint strength of the column beam joint without causing a decrease in workability due to an increase in weight. In addition, a concrete operation related to the connection work in which a recess for the connection work space is formed closer to the connection side with the column member than the engagement coupling means of the column-side joining metal fitting and the connection work is performed via the recess. Since the technical means are also adopted, it is possible to widely cope with the work mode in which the column side joining bracket is connected later to the column member side connection member such as an anchor member inserted or embedded in the column member in advance. It is extremely effective for improving workability. Furthermore, since the through-hole connected to the concave portion is provided in the vertical wall portion on the column side that forms the concave portion for the connection work space so as to coincide with the connection axis of the column side, the insertion hole of the vertical wall portion It is possible to position the connection axis on the column side and the beam side almost on the same line by connecting and fixing, so that the external force acting on each joint fitting is generated between the axes. The conventional eccentricity problem can be solved easily and accurately.

As a pillar or beam of a wooden building to which the present invention is applied, it is preferable to use a structural laminated material because it can reduce restrictions on the degree of freedom of layout, the position of windows, the size of the opening area, etc. Needless to say, the present invention can also be applied to general wood processed into a predetermined size. Further, it is possible to freely select a specific outer shape of the joining metal fitting and a specific configuration of the meshing coupling portion including the rack-shaped uneven portion. In short, a rack-shaped uneven part formed on the joint surface of the joining metal fittings connected to the pillar material side and the beam side joining metal fittings connected to the beam material side. The beam material and the column material are joined via the meshing and coupling means consisting of: a connection axis between the column side connection fitting and the column material, and a connection axis between the beam side connection fitting and the beam material. Are connected to each other through a recess for a connection work space formed closer to the connection side with the column material than the meshing connection means of the column side connection metal fittings. Anything is acceptable. Furthermore, not only a form in which the column-side joining brackets connected to the column member side and the beam-side joining brackets connected to the beam member side are directly meshed and joined, but also those column-side joining brackets and beams A configuration in which a connecting intermediate fitting is engaged with the side joining fitting is also possible .

1 and 2 an illustration of a structural example for the description of the meshing coupling portion of Beam welding fitting according to the present onset bright, FIG. 1 is a sectional view showing the meshing prior to the coupling FIG. 2 is a cross-sectional view showing a state after meshing connection. In the figure, reference numerals 1 and 2 denote joining fittings, and one of the fittings, for example, the joining fitting 1 is used as a column-side joining fitting connected to the column member side, and the other joining fitting 2 is a beam member. It is used as a beam side joint that is connected to the side. Female screws 3, 4 are formed at the ends of the joining brackets 1, 2, and the male screws 3 formed at the ends of the joining bracket 1 are, for example, male male anchor members installed on the column member side. The threaded portion is screwed, and the male threaded portion of the anchor member installed on the beam member side is threadedly engaged with the female screw 4 formed at the end of the other joining metal fitting 2. Thereby, the joining metal fitting 1 is installed on the column material, and the joining metal fitting 2 is installed on the beam material. Further, rack-shaped uneven portions 5 and 6 that can be engaged with each other are formed on the opposing joining surfaces of the joining metal fittings 1 and 2 to constitute a meshing coupling portion. In the meshed state of these concavo-convex portions 5, 6, the fixing bolts 7, 8 are inserted from the insertion holes 9, 10 formed in the joining metal fitting 2 to the female screws 11, 12 formed in the joining metal fitting 1. By screwing and tightening and fixing with the fixing bolts 7 and 8, the engagement and connection state of the concave and convex portions 5 and 6 is accurately maintained. In the figure, reference numerals 13 and 14 denote washers.

By the way, the center heights Ha and Hb of the meshing portions made up of the rack-shaped uneven portions 5 and 6 of the joining metal fittings 1 and 2 are the axial centers of the female threads 3 and 4 of the joining metal fittings 1 and 2, respectively. The heights ha and hb, that is, the height of the connecting shaft center between the joining metal fittings 1 and 2 and the column material or the beam material are made to coincide with each other. Therefore, as shown in FIG. 2, in the meshed connection state of the concavo-convex portions 5, 6, the center of the meshing portion composed of the concavo-convex portions 5, 6 of the joining metal fittings 1, 2 and their joining metal fittings 1 2 and the connecting shaft center of the column member or the beam member are all located on a straight line. As a result, the eccentricity between the connecting shaft center of the joining metal fitting 1 and the column material and the connecting shaft center of the joining metal fitting 2 and the beam material is eliminated. The problem of the conventional bending moment caused by this is also solved .

FIG. 3 is a cross-sectional view showing a meshing connection state of another structural example , and FIG. 4 is a plan view showing the column beam joining bracket. In the figure, reference numerals 15 and 16 denote joining metal fittings. One of the fittings, for example, the joining metal fitting 15 is used as a column-side joining metal fitting installed on the column material side, and the other joining metal fitting 16 is a beam material. Used as a beam-side joint fitting installed on the side. Further, female screws 17 and 18 are formed at the end portions of the joining metal fittings 15 and 16, and the female screw 17 formed at the end portion of the joining metal fitting 15 is, for example, an anchor member installed on the column member side. The male screw portion of the anchor member installed on the beam material side is screwed into the female screw 18 formed at the end of the other joining metal fitting 16.

In the case of the metal fittings 15, 16, meshing irregularities formed by inclined surfaces 19, 20 on both sides and an intermediate inclined surface 21 lower than the inclined surfaces 19, 20 are provided on the opposing bonding surfaces. The part is formed. Then, corresponding to the intermediate positions of the inclined surfaces 19 and 20, the through holes 22 and 23 are formed on the side of the joining metal fitting 16 so that the inclined surfaces 19 and 20 can be tightened and fixed in a state of being penetrated by the fixing bolts. The female screws 24 and 25 are formed on the side of the joining metal fitting 15 with the inclined surfaces 19 and 20 interposed therebetween.

FIG. 5 is a cross-sectional view showing an interlocking connection state of the beam-column joining bracket according to the embodiment of the present invention. In this embodiment, an insertion hole 28 for the connecting bolt 27 is formed at the end of the joining metal fitting 26 connected and installed on the column member side, and a recess 29 for the working space is formed inside thereof. That is, as shown in the figure, an insertion hole 28 that is continuous with the recess 29 is provided in the vertical wall portion on the column side that forms the recess 29 for the work space. As a result, when the joining metal fitting 26 is installed on the column member, a work form in which the connecting bolt 27 is inserted into the insertion hole 28 from the recess 29 and connected to the connecting member on the column member side as shown in the drawing is possible. become. The joining metal fitting 30 connected and installed on the beam member side has the same configuration as the joining metal fitting 16.

  Thus, when the column member and the beam member are joined using the joining metal fittings 26 and 30 according to the present embodiment, the lower anchor member 32 embedded in the pillar member 31 as shown in FIG. The connecting bolt 27 is screwed into a female screw formed on the end face, and the lower column-side joining metal fitting 26 is installed on the column member 31 by tightening and fixing. Further, a female screw formed at the end of the beam-side joining metal fitting 30 is screwed into each male screw formed at the end of the upper and lower anchor members 34 and 35 embedded in the beam member 33. By tightening and fixing, the upper and lower beam-side joining metal fittings 30 are installed on the beam member 33 in the opposite directions. Incidentally, the latter installation work of the upper and lower beam-side joining fittings 30 to the beam member 33 can be performed in advance in a factory or the like, and a simple and accurate work is possible.

Thereafter, as shown in FIG. 7, the lower beam-side joining metal fittings 30 installed on the beam members 33 are placed on the lower column-side joining metal fittings 26 installed on the column members 31. Tighten and fix with the fixing bolt while engaging the irregularities formed on the joint surface. Thereafter, the upper column-side joining metal fitting 26 is placed on the upper beam-side joining metal fitting 30 installed at the end of the beam member 33, and formed on the joining surfaces of these joining metal fittings 26, 30. Tighten and fix with the fixing bolt while meshing the uneven parts. Before and after this, the connection bolt 27 was inserted into the insertion hole 28 using the working space formed by the recess 29 formed in the column-side joining metal fitting 26 and embedded in the column member 31. The upper column-side joining fitting 26 is connected and installed to the column member 31 by being screwed into a female screw formed on the end surface of the upper anchor member 36 and fastened and fixed. Through the above-described joining operation, the column material 31 and the beam material 33 are accurately joined through the meshing and coupling action of the concavo-convex portions between the upper and lower column-side joining metal fittings 26 and the upper and lower beam-side joining metal fittings 30. Will be .

FIG. 8 is a cross-sectional view showing a meshing coupling state of another structural example . This structural example includes a column-side joining bracket 37 connected and installed on the column material side, a beam-side joining bracket 38 connected and installed on the beam material side, and the column-side joining bracket 37 and the beam-side joining. This is an example of a configuration constituted by three metal fittings, ie, an intermediate metal fitting 39 for connecting the metal fitting 38. Thus, in the state where the three metal fittings of the column side joining metal fitting 37, the beam side joining metal fitting 38, and the connecting intermediate metal fitting 39 are engaged with each other by engaging the concave and convex portions formed on the joining surfaces thereof, The axial center of the insertion hole 40 of the connecting bolt formed in the column-side joining metal fitting 37 and the axial center of the female screw 41 of the beam-side joining metal fitting 38 are set so as to be in a straight line. configured bending moment does not occur based on the eccentricity between the heart and resulting Rukoto course.

It is sectional drawing of the structural example which illustrated the state before meshing coupling | bonding. It is sectional drawing which showed the state after the meshing coupling | bonding of the structural example . It is sectional drawing of the other structural example which illustrated the meshing coupling state. It is the top view which showed the example of the structure . It is a cross-sectional view showing a meshing coupling state Beam welding fitting according to actual施例of the present invention. It is explanatory drawing which showed the column beam joining operation | work using the same metal beam joining bracket. It is explanatory drawing which showed the same column beam joining operation | work. It is sectional drawing of the other structural example which illustrated the meshing coupling state. It is sectional drawing which illustrated the meshing coupling | bonding state of the rack-shaped uneven | corrugated | grooved part in a prior art.

  DESCRIPTION OF SYMBOLS 1, 2 ... Joining metal fittings, 3, 4 ... Female screw, 5, 6 ... Uneven part, 7, 8 ... Fixing bolt, 9, 10 ... Insertion hole, 11, 12 ... Female screw, 13, 14 ... Washer, DESCRIPTION OF SYMBOLS 15,16 ... Joining metal fitting, 17, 18 ... Female screw, 19-21 ... Inclined surface, 22, 23 ... Insertion hole, 24, 25 ... Female screw, 26 ... Joining metal fitting, 27 ... Connecting bolt, 28 ... Insertion hole, 29 ... concave portion, 30 ... joining metal fitting, 31 ... pillar material, 32 ... anchor member, 33 ... beam material, 34, 35 ... anchor member, 36 ... anchor member, 37 ... column side joining metal fitting, 38 ... Beam side joining bracket, 39... Intermediate bracket for connection, 40 .. Insertion hole, 41.

Claims (2)

A column-side fitting that is connected to the column member side and a beam-side fitting that is connected to the beam member side are used, and a bite made up of a rack-like uneven portion formed on the joining surface of these joining members. In a column beam connection structure of a wooden building that joins a column member and a beam member via a mating connection means, a connection axis between the column side connection bracket and the column member, the beam side connection bracket and the beam member, with a coupling axis of is configured to be located approximately on the same line, a recess for consolidation work space the connecting side closer to the pillar than the meshing coupling means of the pillar-side joining bracket, and An insertion hole that continues to the recess is provided in the column-side vertical wall portion that forms the recess in a state of being aligned with the connection axis of the column side, and the beam side is inserted through the insertion hole provided in the vertical wall portion. It is characterized by being configured to allow the connecting operation in a state positioned on substantially the same line as the connecting axis of Beam-column joint structure in wooden buildings. A column-side fitting that is connected to the column member side and a beam-side fitting that is connected to the beam member side are used, and a bite made up of a rack-like uneven portion formed on the joining surface of these joining members. A beam-to-column metal fitting for a wooden building that joins a column material and a beam material through a mating and coupling means, and a meshing portion made up of rack-shaped uneven portions formed on the joint surface of each metal fitting The center height is made to substantially coincide with the height of the connecting shaft center between the joining bracket and the column member or the beam member, and closer to the connection side with the column member than the engagement coupling means of the column side joining bracket. A recess for the connection work space is formed, and an insertion hole for a connection bolt connected to the recess is provided in the vertical wall portion on the column side forming the recess in a state of being aligned with the connection axis of the column side . This is a column-to-column fitting for a wooden building.

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