JP2006312819A - Column and beam joint fixture and column and beam joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wooden column and beam joint fixture capable of adjusting height dimension easily with high precision and to provide a column and beam joint structure capable of joining a column and a beam mutually with high precision using the column and beam joint fitting. <P>SOLUTION: In this joint structure of the wooden column 1 and the wooden beam 2 forming a rigid frame body, a protruding part 20 is provided in a horizontal plate part 13a on an upper side of the column and beam joint fitting 13 for joining the column 1 with the beam 2. By polishing an upper face of the protruding part 20, height of the column and beam joint fitting 13 is adjusted with high precision and corresponds to height dimension in the vertical direction of a cut-out part 1b of the column accurately. Consequently, the column 1 and the beam 2 can be mutually and easily joined at accurate height through the column and beam connection fitting 13 to transmit bending moment securely. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joint fitting and joint structure for joining a column and a beam in a wooden building, and in particular, restrains relative deformation at the joint between the column and the beam, and a transmission of a bending moment occurs between the two. As described above, the present invention relates to a joint fitting for joining a column and a beam and a column beam joint structure using the same.

  In a widely used wooden building, a column and a beam are joined by inserting a tenon in which the end of the beam is processed into a tenon provided in the column. Such a joint structure allows deformation between the two and hardly transmits the bending moment. In other words, the shaft assembly that cannot resist the bending moment and is formed of a plurality of columns and a plurality of beams (including members that are installed in the lateral direction such as torso, eaves, and foundations) is deformed. easy. For this reason, braces are arranged in the walls between the columns to resist deformation when a horizontal force is applied during an earthquake or the like.

  Bracing is generally provided at a plurality of positions and is required in two directions in which the directions of inclination are opposite. Therefore, in a conventional wooden building, it is necessary to secure a wall body for providing braces, which may hinder the setting of the opening and the use of the indoor space. Under such circumstances, there has been proposed a so-called rigid connection between the column and the beam, that is, a connection that causes the transmission of a bending moment, and a ramen structure as the shaft.

  As shown in FIG. 8, in the joint structure of the beam and the column described in Patent Document 1, two screw members 111 are screwed in the vertical direction at a predetermined interval on the surface of the beam 102 that contacts the column 101. . A screw hole is formed in the lower end portion of these screw members 111 in the axial direction. On the other hand, a notch 101 a is provided on the end face of the column facing the beam 102, and a column fixing bracket 112 (connection bracket) is joined in the notch, and is provided on the top of the column fixing bracket 112. The bolt 113 is inserted through the bolt insertion hole, and the bolt 113 is screwed into the screw hole of the screw member 111 and tightened. Thereby, the beam 102 and the column 101 are connected via the column fixing bracket 112. Therefore, when a bending moment acts between the column 101 and the beam 102, a tensile force acts on one of the two screw members 111, and a compressive force acts on the other, and these forces extend over the entire length of the screw member 111. The bending moment is transmitted between the column 101 and the beam 102 without a large stress being concentrated locally on the beam 102 from the circumferential surface.

As shown in FIG. 9, in the joint structure of the column and the beam described in Patent Document 2, two bolts 123 (screw members) are embedded in the vertical direction at a predetermined interval on the surface where the beam 122 contacts the column 121. In addition, a screw hole is formed in the end portion of the embedding bolt 123 in the axial direction. Further, a notch 121 a is provided on the end surface of the column 121 facing the beam 122, and an embedded bolt 124 is embedded in the axial direction of the column 121 from the notch. A screw hole is also bored in the axial direction at the end of the embedded bolt 124. And the joining metal fitting 125 is inserted in the notch 121a of the pillar 121, the bolt 126 is inserted from the bolt insertion hole provided in this joining metal fitting 125, and the embedded bolts 123 and 124 embedded in the beam 122 and the pillar 121. The bolts 126 are screwed into the respective screw holes and tightened, whereby the beam 122 and the column 121 are connected via the joint fitting 125.
JP 2004-092149 A Japanese Patent Laid-Open No. 2004-143779

Conventionally known joint structures as described above have the following unsolved problems.
In a structure in which a beam is placed so as to be bridged on the upper surface of a column and joined, in a structure in which a part of the column is cut out and a joining metal fitting is arranged in this part, high dimensional accuracy is required for the joining metal fitting. In other words, in order to connect the column and the beam via the joint fitting in the notch and to bring the end face of the column into close contact with the lower surface or upper surface of the beam, the joint fitting must correspond to the notch dimension accurately. is there. In particular, in a structure in which a large-diameter screw member is screwed into the beam and the joining bracket is joined so as to abut against the screw member, the screw member is accurately screwed into the beam or column, and the joining bracket is manufactured with high accuracy. Thus, the wooden member can be assembled with high accuracy.

The joint fitting used as described above can be manufactured by assembling steel plates by welding or by casting, but in order to obtain high accuracy by any method, it is manufactured slightly larger than a predetermined dimension. It is desirable to adjust the dimensions by polishing or the like. In particular, when a joint fitting is manufactured by casting, shrinkage occurs when the cast iron is cooled, and it is necessary to adjust dimensions by polishing or the like in order to finish with high accuracy.
However, it takes a lot of work to adjust the dimensions by polishing the contact surface of the joint fitting with the pillar or the contact surface with the beam, and the production cost of the joint fitting becomes excessive. End up.

  The present invention has been made in view of the circumstances as described above, and an object thereof is a joining metal fitting and a joining structure for joining a wooden column and a beam so that a bending moment can be reliably transmitted. An object of the present invention is to provide a column beam joint that can be finished with high accuracy by a simple process and a column beam connection structure that can accurately join a column and a beam by using this joint.

In order to solve the above-mentioned problem, the invention according to claim 1 is that a large-diameter screw member is screwed into a wooden beam and a wooden column, respectively, and the screw hole provided in the axial direction from the end surface of the screw member. A beam-to-column fitting that is coupled to the column and the beam by screwed bolts, opposite to each other, and an end surface of the screw member screwed into the column and an end surface of the screw member screwed into the beam Two horizontal plate portions that are in contact with each other, and side plate portions that join the edges of these horizontal plate portions to each other, and the two horizontal plate portions are fixed to the column and the beam. A bolt hole through which a bolt for insertion is provided is provided, and one of the horizontal plate portions is provided with a beam-to-column fitting having a protruding portion in a region in contact with an end surface of a screw member screwed into the column or beam.
In addition, the said beam contains the member generally constructed | installed in horizontal directions, such as a trunk difference, eaves, and a foundation.

In this column-beam joining bracket, a protruding portion is provided on one horizontal plate portion, and this protruding portion comes into contact with an end surface of a screw member screwed into the beam or the column. By adjusting the height of the portion, the overall height of the beam-column joint can be adjusted and easily adapted to a desired dimension at the column-beam junction. The projecting portion can be provided in a limited range at the portion that contacts the screw member, and the step of adjusting the height of this portion by polishing or the like is performed by polishing the entire surface of the horizontal plate portion of the joint fitting. It is significantly easier than the process of adjusting the time and the time required is shortened. Therefore, it is possible to efficiently adjust the dimensions of the joint fitting and to manufacture a highly accurate joint fitting at a low cost.
In addition, since the projecting portion adjusted with high accuracy is brought into contact with a screw member screwed into the beam or the column, and the force is transmitted to the beam or the column through the screw member, the column and the beam are While being firmly joined, these are joined at an accurate position, and a highly accurate structural housing can be constructed.

  According to a second aspect of the present invention, in the column beam joint fitting according to the first aspect, the projecting portion is in contact with the entire end surface of the screw member screwed into the column or beam.

  In this beam-to-column fitting, the entire area of the end surface of the screw member screwed into the column or beam is in contact with the protruding portion, so that force is reliably transmitted from the fitting to the screw member, and further to the peripheral surface of the screw member. A force is transmitted to the column or the beam from the provided spiral projecting portion. Therefore, a structure in which the shearing force and the bending moment acting on the joint between the column and the beam can be reliably transmitted between the column and the beam.

  The invention according to claim 3 is the column beam fitting according to claim 1 or 2, wherein the protruding portion has a height of the column beam fitting by polishing an upper end surface of the protruding portion. Is adjusted to a predetermined dimension.

  In this column-beam joining bracket, the upper end surface of the protruding portion is polished, so that it is accurately adjusted to a height suitable for the column-beam joining portion. Therefore, the beams to be joined above or below the columns are joined with high accuracy. In particular, when the column-beam joint is manufactured by casting, the protruding portion cast slightly larger than the desired height dimension can be easily polished according to the height dimension of the column-beam joint. Therefore, it is possible to obtain a low-cost and highly accurate fitting.

  The invention according to claim 4 is a joining structure of a wooden beam laid in a lateral direction and a wooden column joined with an end face abutting against an upper surface or a lower surface of the beam, and an end portion of the column Is provided with a plurality of notches, and screw members are screwed in the axial direction of the pillars from the notches, and the beams are perpendicular to the screw members screwed into the pillars in the vertical direction. A screw member is screwed into the screw, a bolt is screwed into a screw hole provided in an axial direction from an end surface of the screw member screwed into the column and a screw member screwed into the beam, and the joint disposed in the notch The metal fitting is coupled to both the screw member screwed into the pillar by the bolt and the screw member screwed into the beam, and both screw members are connected via the joint metal fitting, The joint fittings are opposed to each other, two horizontal plate portions that are in contact with each of an end surface of a screw member screwed into the column and an end surface of the screw member screwed into a beam, and And a side plate portion that joins the edges to each other, and one horizontal plate portion provides a column beam connection structure having a protruding portion with which an end face of a screw member screwed into the column or beam abuts. Is.

  In this column beam connection structure, the screw member screwed into the column and the screw member screwed into the beam are firmly bonded via the column beam connecting metal fitting. And since this column beam joining metal fitting can adjust the height of the said protrusion part easily, the height of the whole joining metal fitting can also be adapted to the height of the junction part of a column and a beam easily and correctly. Therefore, the end surface of the column is accurately in contact with the lower surface or the upper surface of the beam. As a result, a vertical load is transmitted between the beam and the column at the end face of the column, and between the screw member screwed into the column and the screw member screwed into the beam at a plurality of positions, the column beam A tensile force and a compressive force are transmitted through the joint fitting, and deformation between the column and the beam is constrained at the joint. Therefore, a strong structure capable of resisting the bending moment is obtained.

  Further, the force transmitted through the screw member and the beam-to-column fitting is dispersed and acts on the wooden column or beam because the screw member is engaged with the wooden member in a wide range. It is possible to suppress the generation of a large stress.

  As described above, in the column beam joint fitting according to the present invention, the height of the protruding portion provided on the horizontal plate portion can be easily adjusted, and the column and the beam are joined accurately and firmly with high accuracy. can do. In addition, by using such a fitting, the end face of the column is brought into close contact with the upper or lower surface of the beam, and the screw member screwed into the column and the screw member screwed into the beam are joined with high accuracy at a plurality of positions. And it can be set as the junction structure where a big vertical force and bending moment are reliably transmitted between a pillar and a beam.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing a structural frame of a wooden building in which the column beam joint structure of the present invention is suitably used.
In this structural housing, the lower layer portion constituting the first floor and the upper layer portion constituting the second floor are each formed by combining a plurality of ramen frame structures, and the entire structural housing is formed by laminating them. . Each ramen frame has a so-called beam-winning structure in which wooden beams 2 and 4 are placed on and joined to the wooden columns 1 and 3, and each of the columns 1 and 3 constituting the ramen frame, respectively. The cross section is a flat member having a large dimension in the axial direction of the beam to be joined and a small dimension in the direction perpendicular thereto. The beams 2 and 4 are also flat members having a large vertical cross-sectional dimension and a small horizontal cross-sectional dimension. Therefore, the joint portion of each frame structure has a structure that resists bending in one direction.

  These frames are joined so that the directions are perpendicular to each other on a plane, that is, the beams 2-1, 2-2, 4-1 and 4-2 of a plurality of frames are perpendicular to each other. Has been. Thus, a plurality of rigid frame structures that resist horizontal forces in different directions are combined with each other to form a structural frame that can resist horizontal forces in all directions. The upper column 3 is erected on the beam 2 of the lower frame structure, and the bending moment is transmitted also at these joints.

FIG. 2 is an exploded perspective view showing an embodiment of the invention according to the present application, which is a joint structure between the beam 2 used in the rigid frame structure shown in FIG. 1 and the column 1 of the lower layer portion. FIG. 3 is a cross-sectional view of the same joint structure, showing a cross section parallel to the axis of the rigid frame structure.
In this joining structure, notches 1 b are provided at both ends in the long side direction on the upper end surface of the pillar 1, and the central portion 1 a is in contact with the lower surface of the beam 2. And the two 1st screw members 11 and 11 are screwed in from the notch 1b of the pillar 1 to the axial direction of this pillar. On the other hand, two second screw members 12 and 12 are also screwed in the corresponding positions of the beam 2 in the vertical direction, and these first and second screw members 11 and 12 are axially extended from the end surfaces. Screw holes 11b and 12b are formed. A headless bolt 15 is screwed into the screw holes 12b of the second screw members 12 and 12 screwed into the beam 2, and a nut 16 is screwed into the headless bolt 15. On the other hand, a bolt 14 is screwed into the screw hole 11 b of the first screw member 11 screwed into the column 1. The beam-to-column fitting 13 disposed in the column notch 1b is coupled to the first screw member 11 by a bolt 14, and is coupled to the second screw member 11 by a headless bolt 15 and a nut 16. Yes. Thereby, the pillar 1 and the beam 2 are joined via the screw members 11 and 12 and the pillar-beam joint fitting 13.

  The first and second screw members 11 and 12 are the same, and as shown in a side view and a front view in FIG. 4, a rod-shaped steel member is provided with spiral projecting portions 11a and 12a. As described above, the screw holes 11b and 12b in the axial direction are provided on both end faces. As shown in FIG. 2, each screw member 11, 12 is formed by providing a vertical hole in the beam 2 or the pillar 1, and further screwing in after cutting a spiral groove.

  As shown in FIG. 5, the headless bolt 15 is a bolt (long screw bolt) in which a male screw is formed over the entire length, and can be tightened using a nut 16. Moreover, the diameter becomes small as it approaches the front-end | tip.

  As shown in FIG. 6, the above-mentioned beam-to-column fitting 13, ie, the beam-to-beam fitting according to an embodiment of the present invention, connects two horizontal plate portions 13a, 13b facing each other vertically and their edges to each other. The upper horizontal plate portion 13a is provided with an upper bolt hole 13d, and the lower horizontal plate portion is provided with a lower bolt hole 13e. Further, the upper horizontal plate portion 13a is provided with a protruding portion 20 in the peripheral region including the upper bolt hole 13d, and the entire lower end surface of the second screw member 12 screwed into the beam 2 is the protruding portion. It comes into contact with the flat upper surface. Then, the headless bolt 15 inserted through the upper bolt hole 13d and the nut 16 are fastened and fixed. The lower horizontal plate portion 13b is brought into contact with the upper end surface of the first screw member 11 screwed into the pillar 1 and is fixed by a bolt 14 inserted through the lower bolt hole 13e.

Moreover, as shown in FIG. 6, the said beam-column joining metal fitting 13 has one side part opened, and the other side of the opened part is a cylindrical curved surface having an axis in the vertical direction. That is, the cross section is uniform in the vertical direction, and the back side of the planar shape is arcuate.
As for the dimensions of the column beam joint fitting 13, the width and depth in the horizontal direction are smaller than the width of the column 1. The height is accurately formed by polishing the protrusion 20 provided on the upper horizontal plate portion 13a so that the height is substantially equal to the vertical dimension of the notch 1b provided at the end of the column 1. Yes.

  This column beam joint fitting 13 is manufactured by casting in which cast iron is poured into a mold. In this manufacturing method, there is a high possibility that the size at the time of completion of the column beam fitting 13 is different from the desired size. Therefore, the column beam joint fitting 13 requiring high accuracy is cast with a height dimension slightly larger than a predetermined value. That is, the upper surface of the protruding portion 20 provided on the upper horizontal plate portion 13a is cast slightly higher than the desired height, and is adjusted to the desired height by polishing the excessive height portion of the protruding portion 20. The This projecting portion 20 can be provided only in a range where the region abuts on the screw member, and since the range to be polished is limited, the processing amount is remarkably reduced compared to polishing the entire area of the horizontal plate portion, The dimensions can be adjusted efficiently.

Next, the process of joining the column 1 and the beam 2 will be described.
The pillar 1 is provided with a notch 1b having a predetermined dimension at an end portion at a processing stage in a factory or the like. Then, a hole is cut in the axial direction from the notch 1b, and the first screw member 11 is screwed. A bolt 14 is screwed into a screw hole 11b provided in an end portion of the first screw member 11, and a horizontal plate portion 13b on the lower side of the beam-to-column connecting bracket 13 is cut out to form an end surface in the notch 1b and the first screw. The column beam joint fitting 13 is fixed to the notch 1b in contact with the end face of the member 11. In addition, the second screw member 12 is screwed into the beam 2 at a predetermined position by work in a factory or the like.

  At the site where the column 1 and the beam 2 are assembled, the column 1 is erected at a predetermined position. On the other hand, a headless bolt 15 is screwed into the screw hole 12b of the second screw member 12 embedded in the beam 2 bridged thereon, and the tip protrudes downward. Thereafter, the tip of the headless bolt 15 that is lifted above the pillar 1 that is erected and screwed into the second screw member 12 faces the beam-to-column fitting 13 that is fixed to the pillar 1. Support in position. Then, the headless bolt 15 is inserted from the tip into the upper bolt hole of the beam-to-column fitting 13 fixed to the column 1 while the beam 2 is slowly lowered. At this time, the headless bolt 15 has a small diameter at the tip, and can be easily guided to the upper bolt hole 13d. Then, by further slowly lowering the beam 2, the inclined surface 15 a at the tip of the headless bolt is guided by the inner peripheral surface of the upper bolt hole 13 d and placed at an accurate position on the column 1. Further, the beam-to-column fitting 13 fixed in the notch at the upper end of the column 1 has a protruding portion 20 provided on the upper horizontal plate portion 13a finished to an accurate height by polishing. The lower surface of 2 is in contact with the upper end surface of the column, and the entire end surface of the screw member 12 screwed into the beam 2 is in contact with the protruding portion 20 of the beam-to-column fitting 13, so that the beam 2 has an accurate height. It is supported by.

  After that, the second screw member screwed into the beam 2 by screwing the nut 16 from the open part of the side surface of the beam-to-column fitting 13 fixed to the column 1 to the tip of the headless bolt 15 and tightening firmly. 12 is firmly joined. As a result, the screw members 11 and 12 screwed into the pillar 1 and the beam 2 are connected via the pillar-beam joint fitting 13.

  By joining the column 1 and the beam 2 as described above, the lower surface of the beam 2 is pressed against the center portion 1a of the column 1 and the second screwed into the beam 2 as shown in FIG. The screw members 12, 12 are connected to the first screw members 11, 11 via the column beam joint fitting 13 at both ends in the long side direction of the column cross section. As a result, a vertical load acting on the beam 2 is supported by the column 1, and deformation between both is constrained at the joint between the column 1 and the beam 2, and a bending moment is transmitted. As a result, a rigid frame structure having a large rigidity is formed and can resist a horizontal force.

The embodiment described above is a joint structure of the column 1 of the lower layer portion and the beam 2 supported on the lower portion, but the joint portion of the beam 2 and the column 3 of the upper layer portion erected thereon. In addition, the same configuration can be adopted by inverting the top and bottom. At this time, the headless bolt 15 is screwed to the second screw member screwed into the beam 2, and the column 3 to which the column-beam joining bracket 13 is fixed is lifted and the head is inserted into the bolt hole of the column-beam joining bracket 13. The column is slowly lowered so that the none bolt 15 is inserted.
When the upper column 3 is erected at the same position after the lower column 1 and the beam 2 are joined by the above structure, the second screw member 12 screwed into the beam 2 is connected to the upper column 3. 3 and the beam 2 can be used in common. As a result, the lower column 1 and the upper column 3 are coupled by the first screw member 11 and the column-beam joint metal 13, and both the columns 1 and 3 have rigidity close to that of the through column.

It is a schematic perspective view which shows the structural frame of the wooden building in which the column beam junction structure of this invention is used suitably. It is a disassembled perspective view which shows the column beam junction structure which is one Embodiment of the invention which concerns on this application. It is sectional drawing of the column beam junction structure shown in FIG. 1, and shows a cross section parallel to the axis line of a rigid frame structure. FIG. 4 is a plan view and a front view of a screw member used in the column beam joining structure shown in FIGS. 2 and 3. FIG. 4 is a schematic perspective view and a bottom view of a headless bolt used in the beam-column joint structure shown in FIGS. 2 and 3. It is a schematic perspective view of the joining metal fitting used with the column beam joining structure shown in FIG.2 and FIG.3. FIG. 4 is a schematic perspective view showing the column beam connection structure shown in FIGS. 2 and 3, as viewed obliquely from below. It is a schematic perspective view which shows the conventional column beam junction structure. It is a schematic perspective view which shows the other example of the conventional column beam junction structure.

Explanation of symbols

1,3: pillar, 1a: central part of pillar end face, 1b: notch,
2, 4: Beam
11: 1st screw member, 11b: Screw hole, 12: 2nd screw member, 12b: Screw hole, 13: Column beam joint metal fitting, 13a: Upper horizontal plate part, 13b: Lower horizontal plate part, 13c: side plate portion, 13d: upper bolt hole, 13e: lower bolt hole 14: bolt, 15: headless bolt, 16: nut 20: protrusion

Claims (4)

A large-diameter screw member is screwed into each of the wooden beam and the wooden column, and the column and the beam are coupled to each other by a bolt screwed into an axially provided screw hole from the end surface of the screw member. Column beam joint fitting
Two horizontal plate portions that are opposed to each other and are respectively brought into contact with an end surface of a screw member screwed into the column and an end surface of the screw member screwed into the beam, and edges of these horizontal plate portions are connected to each other. A side plate portion to be joined,
The two horizontal plate portions are provided with bolt holes through which bolts for fixing to the pillar and the beam are inserted,
One horizontal plate part has a protrusion part in the area | region which contact | abuts the end surface of the screw member screwed in the said pillar or beam, The column beam joining bracket characterized by the above-mentioned.   2. The beam-column joining bracket according to claim 1, wherein the protruding portion is in contact with the entire region of an end surface of a screw member screwed into the column or the beam.   3. The projection according to claim 1, wherein a height of the column beam joint is adjusted to a predetermined dimension by polishing an upper end surface of the projection. Column beam joint. It is a joining structure of a wooden beam erected in the lateral direction and a wooden pillar joined with its end face abutting against the upper or lower surface of this beam,
A plurality of notches are provided at the end of the pillar,
A screw member is screwed in the axial direction of the pillar from the notch,
In the beam, a screw member is screwed in a vertical direction at a position facing the screw member screwed into the column,
A bolt is screwed into a screw hole provided in an axial direction from an end surface of the screw member screwed into the column and the screw member screwed into the beam,
The joint fitting arranged in the notch is coupled to both the screw member screwed into the column by the bolt and the screw member screwed into the beam, and both screw members are connected via the joint fitting. And
The joint fittings are opposed to each other, two horizontal plate portions that are in contact with each of an end surface of a screw member screwed into the column and an end surface of the screw member screwed into a beam, and A side plate portion that joins the edges to each other,
One horizontal plate portion has a projecting portion with which an end face of a screw member screwed into the column or beam abuts.

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