JP5019786B2 - 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 joint structure between a column member and a beam member that has a large holding force in the joined state, reduced the dependence on the seismic strength based on the rigidity of the conventional wall, and the degree of freedom in the 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 the prior art, as illustrated in FIG. 11, the external force acting on the joint Ca and the axis Ca of the external force acting on the fitting A to be joined. 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 the direction in which the joining brackets 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.

As a solution to the technical problem, countermeasures such as increasing the thickness of the cross-sectional defect part by the fixing bolt insertion hole and reinforcing the number of fixing bolts can be considered. This is not only an effective solution to the bending moment caused by eccentricity, but also increases the weight of the metal fitting and impairs the workability. Furthermore, by configuring so that the axial center Ca of the external force acting on the joining bracket A to be joined and the axial center Cb of the external force acting on the joining bracket B are positioned on the same straight line, It is also effective to eliminate the bending moment due to eccentricity without increasing the thickness of the metal fittings, but in order to reduce the thickness of the metal fittings for joining, the meshing connection state of the uneven parts is more accurate and stable. Engineering husband for holding was required.

  The present invention was developed in view of the above-described conventional technical situation, and devised how to dispose the fixtures for maintaining the meshed connection state of the uneven portions in the beam-to-column fittings. The purpose of the present invention is to provide a beam-to-column joining technique that provides a sufficient holding action while suppressing the plate thickness of the joining bracket, and that is also effective for reducing the weight of the joining bracket itself and reducing the material cost. .

In order to solve the above-mentioned problems, in the inventions of claims 1 and 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 for joining them. In the column beam connection structure of a wooden building, in which the column member and the beam member are joined through the meshing and coupling means formed of the uneven portion having three or more inclined portions joined to each other formed on the joint surface of the metal fitting, Flat parts formed by connecting to the inner terminal portions of the inclined parts located at both ends by a fixture that penetrates the range of the joints between the inclined parts located at both ends forming the part. The technical means of maintaining the meshed state of the concavo-convex portions in the joined state was adopted. The inclined portion forming the uneven portion is composed of an inclined portion having an insertion hole for the fixture and an inclined portion not provided, and between the inclined portions having an insertion hole for the fixture, You may make it arrange | position the inclination part which is not provided with the insertion hole whose height is lower than the inclination part provided with the insertion hole (Claim 3). Further, the inclined portion forming the uneven portion is composed of an inclined portion provided with an insertion hole of the fixture and an inclined portion not provided, and the inclined portion not provided with the insertion hole is in the joining axis direction of the joining metal fitting. It is also effective to set the inclination angle with respect to that larger than that of the inclined portion having the insertion hole.

According to the present invention, the following effects can be obtained.
(1) In the present invention, the fixing tool for maintaining the meshing state of the concavo-convex portions is allowed to pass through the range of the joint portion between the inclined portions located at both ends forming the concavo-convex portions, and both the end portions thereof. since it is configured to so that to hold the meshing state of the uneven portion in a state that also is joined to the flat portions formed by connecting the inner end of the inclined portion positioned, their fixture is penetrated It is possible to maintain the resistance function against the external force more accurately without reducing the bonding area for the intermediate inclined portion located between the inclined portions at both ends, and even when the deformation of the bonded portion is advanced by the external force, the bonded portion It is possible to prevent the situation of turning up from the end portion of the sculpture accurately, and to maintain the meshing state of the concavo-convex part more accurately and stably.
(2) Therefore, it is possible to easily cope with a case where the axial centers of both of the joining metal fittings to be joined are positioned on a straight line without increasing the thickness of each joining metal fitting. .
(3) Moreover, since it comprised so that the inclination part which forms an uneven | corrugated part may be penetrated with a fixing tool, the meshing coupling state of the uneven | corrugated | grooved part is hold | maintained directly, and an exact and firm holding state is obtained easily. It is done.
(4) Moreover, since the fixture is disposed in the meshing portion formed of the concavo-convex portion, the length of the joining metal fitting itself is longer than in the case of the prior art in which the fixture is disposed outside the meshing portion. Therefore, the weight can be reduced and the material cost can be reduced.
(5) Further, the inclined portion forming the uneven portion is composed of an inclined portion provided with an insertion hole of the fixture and an inclined portion not provided, and the joining axis of the fitting for the inclined portion not provided with the insertion hole. If the inclination angle with respect to the direction is set to be larger than that of the inclined portion having the insertion hole, the resistance against the external force acting in the axial direction between the metal fittings on both sides can be increased by increasing the inclination angle. it can.

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. With respect to the inclined portions that form the concavo-convex portions, a configuration in which inclined surfaces having the same inclination angle are combined may be used, or an inclined surface having different inclination angles may be combined. In those cases, a specific inclination angle can be freely set. In addition, the basic configuration is such that one or a plurality of inclined portions that are not penetrated by a fixture having a low height are disposed between the inclined portions positioned at both ends, and the fixing tools are not penetrated therebetween. . That is, the concavo-convex portion is composed of an inclined portion at both ends and an intermediate inclined portion, and has a form having three or more inclined portions joined to each other.

FIG. 1 is a cross-sectional view showing a meshing connection state of a beam-to-column fitting according to a first embodiment of the present invention. 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 connected to the column material, the joining metal fitting 2 is connected to the beam material, and the column material and the beam material are joined via the joining metal fittings 1 and 2. The opposing joining surfaces of the joining metal fittings 1, 2 are inclined portions 5, 6 on both sides, an intermediate inclined portion 7 having a height lower than those inclined portions 5, 6, and the inclined portions 5-7. Intermeshable concave and convex portions formed between the flat portions 8 and 9 are formed. Further, as shown in the drawing, in the middle position of the inclined portions 5 and 6 on both sides, tightening is performed with the fixing bolts 10 and 11 passing through the range of the joint portion of the inclined portions 5 and 6. Insertion holes 12 and 13 are formed on the joining metal fitting 2 side, and female screws 14 and 15 are formed on the joining metal fitting 1 side so that the inclined portions 5 and 6 are sandwiched so as to be fixed. As described above, in the case of the inclined portion that forms the uneven portion in the present embodiment, it is composed of the inclined portions 5 and 6 through which the fixing bolts 10 and 11 are penetrated as the fixture and the inclined portion 7 that is not penetrated, Between the inclined parts 5 and 6 positioned at both ends through which the fixing bolts 10 and 11 are penetrated, there is an inclined part 7 that is lower than the inclined parts 5 and 6 and through which the fixing bolts 10 and 11 are not penetrated. It is arranged. In addition, it is possible to change the installation number and arrangement | positioning of an inclination part.

Thus, when joining the metal fittings 1, 2, the concave and convex portions having the inclined portions 5 to 7 formed on the joint surfaces of the metal fittings 1, 2 are meshed as shown in FIG. 1. In this state, by tightening and fixing to the female screws 14 and 15 using the fixing bolts 10 and 11, the engagement and connection state of the concave and convex portions can be accurately maintained, and the joining state of the joining brackets 1 and 2 Is stably maintained. That is, by fixing the fixing bolts 10 and 11, the inclined portions 5 and 6 positioned at both ends of the concavo-convex portion are joined as shown in the figure, and are connected to the inner end portions of the inclined portions 5 and 6 respectively. As a result, the flat portions 8 and 9 formed on the respective joining metal fittings 1 and 2 are also simultaneously joined, so that the engagement state of the concave and convex portions is more accurate under the joined state of the flat portions 8 and 9. And it is held stably. Incidentally, when the fixing bolts 10 and 11 are fastened and fixed to the female screws 14 and 15, the concave and convex portions are engaged accurately and stably by being guided by the inclined portions 5 to 7 themselves. FIG. 2 is an explanatory view showing the relationship between the inclination angles of the inclined portions 5 and 6 and the inclined portion 7. As shown in the drawing, the inclination angle of the inclined portions 5 and 6 provided with the insertion holes for the fixing bolts 10 and 11 is θa with respect to the direction of the joining axis L of the joining metal fittings 1 and 2, and penetrates the fixing bolt. The inclination angle of the inclined portion 7 not provided with the insertion hole is θb. In this embodiment, the inclination angle θb of the inclined portion 7 through which the latter fixing bolt is not penetrated is changed to the inclined portion 5 through which the fixing bolt is penetrated. 6 is set to be larger than the inclination angle θa. As shown in the figure, when an external force, for example, a tensile force F in the direction of the joining axis L, acts on the inclined portion 7 via the joining fittings 1 and 2, the pressing force on the uneven portion in the direction perpendicular to the inclined portion 7. Since it can be disassembled into Fa and a separation force Fb in the direction of separating the joining brackets 1 and 2 along the inclined portion 7, it slides along the inclined portion 7 by setting the inclination angle θb of the inclined portion 7 large. The direction separation force Fb can be suppressed and the pressing force Fa against the concavo-convex portion can be increased, so that the drag state against the tensile force F can be more stably ensured.

  FIG. 3 is a cross-sectional view showing a beam-to-column fitting according to a second embodiment of the present invention. This embodiment is a modification of the first embodiment, in which improvements are made to the through portions of the fixing bolts with respect to the inclined portions 18 to 21 of the joining hardware 16 and 17. That is, in this embodiment, as shown in the figure, the lower end portions of the fixing bolt insertion holes 22 and 23 formed in the joining bracket 17 and the upper end portions of the female screws 24 and 25 formed in the joining bracket 18 are The semi-cylindrical convex fitting portions 26 and 27 and the concave fitting portions 28 and 29 that can be fitted to each other are formed, and by fitting them, the engagement fitting state between the joining metal fittings 16 and 17 is determined. In this way, the joining state is strengthened against the external force acting on the joining fittings 16 and 17.

  FIG. 4 is a cross-sectional view showing a meshing connection state of a column beam joining bracket according to a third embodiment of the present invention. In this embodiment, an insertion hole 32 for a connecting bolt 31 is formed at an end of a joining metal fitting 30 that is connected and installed on the column material side, and a recess 33 for a work space is formed inside the insertion hole 32. When the joining metal fitting 30 is installed on the pillar material, the connecting bolt 31 is inserted from the recess 33 into the insertion hole 32 and connected and fixed to the pillar material side as shown in the figure. Note that the joining metal fitting 34 connected and installed on the beam member side has the same configuration as that of the above embodiment.

  Thus, when the column member and the beam member are joined using the joining brackets 30 and 34 according to the present embodiment, the lower anchor member 36 embedded in the pillar member 35 as shown in FIG. The connecting bolt 31 is screwed into a female screw formed on the end face, and is fixed by tightening, so that the lower column-side joining metal fitting 30 is connected to the column member 35. Further, a female screw formed at the end of the beam-side joining metal fitting 34 is screwed into each male screw formed at the end of the upper and lower anchor members 38 and 39 embedded in the beam member 37. By tightening and fixing, the upper and lower beam-side joining metal fittings 34 are installed in the upside down direction with respect to the beam material 37. Incidentally, the latter installation work of the upper and lower beam-side joining fittings 34 to the beam member 37 can be performed in advance in a factory or the like, and simple and accurate work is possible.

  Thereafter, as shown in FIG. 6, the lower beam-side joining brackets 34 installed on the beam members 37 are placed on the lower column-side joining brackets 30 installed on the column members 35. Tighten and fix with the fixing bolt while engaging the irregularities formed on the joint surface. Thereafter, the upper column-side joining metal fitting 30 is placed on the upper beam-side joining metal fitting 34 installed at the end of the beam member 37, and formed on the joining surfaces of these joining metal fittings 30,34. Tighten and fix with the fixing bolt while meshing the uneven parts. Before and after this, the connection bolt 31 was inserted into the insertion hole 32 using the working space formed by the recess 33 formed in the column-side joining metal fitting 30 and embedded in the column member 35. The upper column-side joining metal fitting 30 is connected and installed to the column member 35 by being screwed and fixed to a female screw formed on the end face of the upper anchor member 40. Through the above-described joining operation, the column member 35 and the beam member 37 are accurately joined through the meshing and coupling action of the concavo-convex portions between the upper and lower column-side joining fittings 30 and the upper and lower beam-side joining fittings 34. Will be.

  FIGS. 7 to 9 show a beam-to-column fitting according to a fourth embodiment of the present invention. FIG. 7 is a sectional view, FIG. 8 is a plan view, and FIG. 9 is a left side view. This embodiment is a modification of the third embodiment, and is characterized by the configuration of the recess 42 formed in the joining metal fitting 41. That is, in the case of the joining metal fitting 41 of the present embodiment, an opening 43 is formed in the lower part of the recess 42 as shown in the figure, and a horseshoe shape in which the lower side is opened to the opening 43 as shown in FIG. This is characterized in that the insertion portion 44 is formed. As shown in FIG. 10, when the main fitting 41 is installed between the upper beam-side fitting 46 installed at the end of the beam 45 and the column 47, the column 47 side A connecting bolt 49 is screwed into a female screw formed at the end of the anchor member 48, and the connecting bolt 49 is formed at the lower part of the horseshoe-shaped insertion part 44 formed at the side of the recess 42. The fitting 41 for joining can be easily connected and fixed to the column member 47 side by being inserted into the recess 42 through the opening 43 and then being fastened and fixed.

It is sectional drawing which showed the meshing coupling | bonding state of the column beam joining metal fitting which concerns on 1st Example of this invention. It is explanatory drawing which showed the relationship of the inclination angle of each inclination part. It is sectional drawing which showed the column beam joining metal fitting which concerns on 2nd Example of this invention. It is sectional drawing which showed the meshing coupling | bonding state of the column beam joining metal fitting which concerns on 3rd Example of this 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 which showed the column beam joining metal fitting which concerns on 4th Example of this invention. It is the top view which showed the same metal beam joining bracket. It is the left view which showed the same metal beam joining bracket. It is the elements on larger scale which showed the column beam joining operation | work. It is sectional drawing which illustrated the meshing coupling | bonding state of the uneven | corrugated | grooved part in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 ... Joining metal fittings, 3, 4 ... Female screw, 5-7 ... Inclined part, 8, 9 ... Flat part, 10, 11 ... Fixing bolt, 12, 13 ... Insertion hole, 14, 15 ... Female screw , 16, 17 ... joining metal fittings, 18 to 21 ... inclined parts, 22 and 23 ... insertion holes, 24 and 25 ... female screws, 26 to 29 ... fitting parts, 30 ... joining metal fittings, 31 ... connecting bolts, 32 ... Insertion hole, 33 ... Recess, 34 ... Joining metal fitting, 35 ... Column material, 36 ... Anchor member, 37 ... Beam material, 38-40 ... Anchor member, 41 ... Joining metal fitting, 42 ... Recess, 43 ... Opening , 44 ... Insertion part, 45 ... Beam material, 46 ... Beam side joint fitting, 47 ... Column material, 48 ... Anchor member, 49 ... Connection bolt

Claims (4)

Three or more inclined portions that are joined to each other and formed on the joining surface of the joining metal fittings that are connected to the pillar material side and the beam side joining metal fittings connected to the beam material side. In the column beam connection structure of a wooden building in which the column member and the beam member are joined through the meshing and coupling means including the uneven portions having the uneven portions, the connecting portions of the inclined portions located at both ends forming the uneven portions The fitting state of the concavo-convex portions is maintained in a state where the flat portions formed by connecting the inner end portions of the inclined portions located at both ends thereof are joined by the fixing tool penetrating the range. The column beam connection structure in the wooden building characterized by comprising. Three or more inclined portions that are joined to each other and formed on the joining surface of the joining metal fittings that are connected to the pillar material side and the beam side joining metal fittings connected to the beam material side. A column-to-beam joint for a wooden building that joins a column member and a beam member via a meshing and coupling means comprising an uneven portion, and a range of inclined portions located at both ends forming the uneven portion An insertion hole for the fixture is formed in the inside, and the fixture is passed through the joint portion between the inclined portions through the insertion hole, and is connected to the inner terminal portion of each inclined portion located at both ends thereof. A pillar-beam joining metal fitting in a wooden building, characterized in that the engagement state of the concavo-convex portions is maintained in a state where the flat portions are joined to each other .   The inclined portion forming the uneven portion is composed of an inclined portion having an insertion hole for the fixture and an inclined portion not provided, and between the inclined portions having an insertion hole for the fixture, 3. The column beam joining bracket in a wooden building according to claim 2, wherein an inclined portion not provided with an insertion hole having a height lower than that of the inclined portion provided with the insertion hole is provided.   The inclined portion forming the uneven portion is composed of an inclined portion having an insertion hole for the fixture and an inclined portion not having the insertion hole, and the inclined portion not having the insertion hole is relative to the bonding axis direction of the bonding hardware. 4. The column beam joining bracket in a wooden building according to claim 2 or 3, wherein an inclination angle is set larger than that of an inclined portion provided with an insertion hole.

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