JP2007169883A - Structure of column of balloon framing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exhibit the original force transmitting performance of a wooden framework construction method while having excellent proof stress, by positively joining a column of balloon framing and a horizontal member. <P>SOLUTION: This structure 1 of the column of balloon framing comprises the column of balloon framing 10 formed of three column members 11 of square cross section integrated in the mutually abutting state of side faces and formed with mortises 12, 12 corresponding to tenons of girths 2, 2 joined at least from two directions, and a hold-down hardware 20 serving as a connecting implement for fixing the lower part of the column of balloon framing 10 to a foundation. The mortise 12 is formed only in one side face per column member 11. As for the column member 11 formed with the mortise 12, its side face on the opposite side to the side face formed with the mortise 12 abuts on the side face of the other column member 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a through pillar structure in a wooden frame structure (wooden conventional construction method).

  When building a two-story or higher building with a wooden frame structure, it follows the corner pillars and corner pillars that are provided in the frame that supports the structural frame so that the force acting from the upper floor is accurately transmitted to the foundation. The columns are obliged to be through-columns unless the joints are reinforced to have a strength equal to or greater than the through-columns.

  Conventionally, the mortise 112 formed in the through-column 110 is used to join the through-column in the wooden frame structure to the trunk, a beam, or the like (hereinafter sometimes referred to as “cross member”), as shown in FIG. In addition, a tenon 111 formed at the front end of the cross member 120 is inserted, and this is performed by a so-called joint 111.

  However, since the cross member 120 is joined from two to four directions at a position corresponding to the joint 111 of the through pillar 110, the mortise 112 formed for joining to the cross member 120 is effective for the through pillar 110. There was a problem that the cross section was greatly reduced. For this reason, the strength of the through pillar 110 at this portion is weak, and when a large horizontal force due to an earthquake or the like is applied, the through pillar 110 may be bent into a dogleg shape at a position corresponding to the joint 111. Further, the through pillar 110 may be enlarged at a portion where the plurality of mortises 112 are formed due to a strong horizontal force, and the tenon 121 may fall out of the mortise 112.

  For this reason, in Patent Document 1, as shown in FIG. 7A, three column members are provided as a structure for improving the durability of the column by omitting the joint for joining the through column and the cross member. .. Are formed so that the cross-sectional shape is a hook shape, and a column structure 200 that supports the cross member 220 on the upper end surface of each column member 211 of the assembly column 210. Is disclosed.

Further, in Patent Document 2, as shown in FIG. 7 (b), there is formed a through-hole 321 through which a tenon can be inserted, which is a metal fitting 320 that reinforces the through column 310 in which the mortise 312 is formed. A metal joint 320 made of a steel plate that is fixed to the side surface of the pillar 310 through the through hole 321 so as to face the mortise 312 is disclosed. In addition, the code | symbol 322 in FIG.7 (b) is a flange for fixing the edge part of the cross member joined to the through pillar 310 with the volt | bolt penetrated to an up-down direction.
JP 2002-266428 A ([0012]-[0024], FIGS. 1-5) JP 2004-183477 A ([0025]-[0040], FIG. 1 to FIG. 3)

  However, in the column structure 200 described in Patent Document 1, the column member 210 is divided for each layer in order to fix the column member 200 with the cross member 220 mounted on the upper end of the column member 211 in connection with the cross member 220. Therefore, it cannot be used as a through pillar. Therefore, it is necessary to reinforce the assembly pillars 210 disposed on the upper floor and the lower floor and the cross member 220 disposed between them so as to have a strength equal to or greater than that of the through pillar, and a reinforcing member (not shown) for that purpose. It takes a lot of time to install and increases the cost. Further, according to the column structure 200, the cross member 220 is not directly fitted to the assembly column 210, and thus there is a problem that the force transmission performance may be deteriorated.

  Further, although the joint hardware 320 described in Patent Document 2 reinforces the through pillar 310 whose effective cross section is reduced by forming the mortise 312, the joint hardware 320 is interposed between the through pillar 310 and the cross member. As a result, the installation area of the through pillar 310 and the cross member becomes only the tenon of the mortise 312 and the cross member. For this reason, there is a problem that the advantage of the wooden frame assembling method in which the joining strength is increased by directly contacting the through pillar 310 made of wood and the cross member made of wood is reduced. In other words, compared to the case where the conventional joint is formed and joined, the joining strength between the through column and the cross member is lowered, and there is a possibility that the transmission performance to the foundation of the horizontal force and the vertical force acting on the building may be lowered. It was.

  The present invention solves the above-described problems, and ensures that the through pillar and the cross member are joined together, demonstrates the original force transmission performance of the wooden frame construction method, and has a superior proof stress. The problem is to propose a structure.

  In order to solve the above-described problems, a through-column structure of the present invention includes a through-column in which a plurality of column-shaped column members having a rectangular or square cross-section are integrated with each other in contact with each other; A through-column structure comprising a hole-down hardware that is a connector for fixing the lower part to the foundation, and the through-column is formed with a mortise hole corresponding to the tenon of the cross member joined from at least two directions. The mortise is formed only on one side of one column member, and the column member formed with the mortise has a side opposite to the side on which the mortise is formed. It is characterized by being in contact with the side surface of another pillar member.

According to this through pillar structure, since the through pillar is formed by integrating a plurality of pillar members, the strength is strong and the elasticity is increased, and the proof stress of the building is greatly increased. Further, since the joining of the cross members is performed by fitting the tenons of the cross members into the tenon holes formed in the columns, the cross members are reliably joined.
Since the mortise is formed only in one direction with respect to one column member, the effective cross section of the column member does not become extremely small. Further, even if the mortise is formed, the mortise is not reinforced by the other pillar member, so that the mortise is not weakened by the through pillar.
And since the through pillar is being firmly fixed to the foundation by the hole down hardware, it is possible to transmit the stress which acted on the building via the through pillar to the foundation.

In the through-column structure, the through-column is composed of three column members, and the side surfaces of the other column members abut each other on two side surfaces orthogonal to each other, thereby forming a square shape in cross section. Thus, it is preferable that the mortise is formed on the side surface of the other column member opposite to the contact surface with the one column member.
According to this through pillar, the through pillar constructed at the corner or middle part of the building can be configured with high strength, and the through space protrudes to the outside of the room or the building to narrow the indoor space, It is suitable because it does not disturb the scenery.

The hole-down hardware in the through-pillar structure is a polygonal steel plate including at least one right angle, and a bottom plate laid on the upper surface of the foundation, and is erected from two sides perpendicular to the bottom plate and intersects at right angles with each other. And two vertical plates formed in a square shape are integrally formed, the through pillar is erected on the upper surface of the bottom plate, and the bottom plate is fixed integrally with the foundation. In addition, it is preferable that the vertical plate is fixed to a side surface of the through pillar.
According to the hole-down hardware, it is possible to securely hold the through pillar formed in a cross-sectional shape and firmly fix it to the foundation.

Further, in the through-column structure, the through-column is composed of three column members, and the two column members joined to each other and the side surface orthogonal to the joint surface between the two column members straddling the joint surface. And the other column member that is in contact with the side surface in a state where the two side members are in contact with each other, and the two column members are formed with the mortise hole on the side surface opposite to the joint surface. In the other column member, the mortise hole may be formed on the side surface opposite to the contact surface with the two column members.
According to this through pillar structure, the through pillar constructed in the middle part of the building can be constructed with high strength, and the through pillar projects indoors or outside the building to narrow the indoor space or It is suitable because it does not hinder.

  In the through-column structure, the through-column is composed of five column members, and the side surfaces of one column member having a square cross section are in contact with the side surfaces of the other column members having a rectangular cross section or a square shape. Thus, the cross column is formed in a cross shape, and the through-column is formed with a mortise hole corresponding to the tenon of the cross member joined from four directions, and the mortise hole is the other column. The member may be formed only on the side surface opposite to the contact surface with the one column member.

  Such a through-column structure is preferable because, in the center of the building, the through-column to which the cross member is joined from four sides can increase the strength of the through-column and improve the joining property to the cross member.

  Further, in each of the through-column structures, if the through-column is integrated through a plurality of bolts penetrating at least two column members, the through-column composed of the plurality of column members is surely integrated. It is possible and preferable.

  According to the present invention, it is possible to reliably join the through pillar and the cross member, to exhibit the original force transmission performance of the wooden frame assembling method, and to form the through pillar structure having excellent proof stress. .

Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
Here, FIG. 1 is a perspective view showing a part of a building using the through pillar structure according to the present embodiment. FIG. 2 is a perspective view showing details of the through column structure shown in FIG. FIGS. 3A and 3B are plan sectional views showing through-columns of the through-column structure. FIG. 3A shows a case where cross members are joined from two directions, and FIG. 3B shows a case where cross members are joined from three directions. Yes. FIG. 4 is a perspective view showing a hole-down hardware according to the through-column structure.

  In the present embodiment, as shown in FIG. 1, a case where the through pillar structure 1 of the present invention is used when a two-story building A is constructed by a wooden frame structure will be described.

  Building A has a base 4 laid on the top surface of a concrete foundation 3 of a cloth foundation type, and a through pillar 10 is vertically erected through a hole-down hardware 20 fixed to the foundation 3 at a corner. Structure 1 is arranged, and between the adjacent through-pillar structures 1, a frame is constructed by horizontally laying cross members such as a barrel 2, beams (not shown), eaves girder 6, etc. is doing. Pipe columns 5, 5,... Are erected between the through pillars 10 at a predetermined interval, and support the trunk 2 and the beams or eaves girders 6. In addition, reinforcement 7 and 7 are arranged in an X shape on the inner space between the through pillar 10 and the pipe pillar 5 or between the pipe pillars 5 of the building A to reinforce.

  Here, the pipe column 5 is a column erected between the base 4 and the trunk 2 or the beam, or between the trunk 2 or the beam and the eaves girder 6 as shown in FIG. Divided by level, it plays the role of transmitting the force acting on the upper cross member (both 2, beam, eaves 6 etc.) to the lower cross (base 4, case 2, beam etc.) . On the other hand, the through pillar 10 is a pillar that is erected in a state where it passes through from the foundation 3 (base 4) to the eaves (eave girder 6) without any joints. ) Plays the role of transmitting the force transmitted to the foundation 3.

  Here, the form of the foundation 3 is not limited to the cloth foundation, and may be a solid foundation or an independent foundation, for example. Moreover, the braces 7 should just be installed as needed, and the form etc. are not limited. Needless to say, the shape of the foundation 3 and the installation locations and number of the through pillars 10 and the pipe pillars 5 are appropriately set according to the planned shape of the building A. Similarly, the arrangement, the number, etc., of the torso 2, beams, eaves girder 6, etc. may be appropriately set according to the shape of the building A and the like.

  As shown in FIG. 2, the through-pillar structure 1 according to the present embodiment includes a hole-down hardware 20 to which the foundation 3 is fixed, and a through-pillar 10 erected on the foundation 3 through the hole-down hardware 20. Has been.

As shown in FIGS. 2 and 3, the through pillar 10 is integrated with three pillar members 11, 11,... Having the same cross-sectional square shape in contact with each other. The through-column 10 is formed in a substantially square shape in cross-section when the side surfaces of the column members 11b and 11c are in contact with two side surfaces orthogonal to each other of the single column member 11a. And in this embodiment, as shown in FIG. 2, the through-pillar 10 formed in a substantially letter-like shape in cross section is arranged in the same direction as the foundation 3 that intersects the letter-like shape at a right angle.
In the present embodiment, a solid material having a cross section of 4 mm square (120 mm × 120 mm) is used as the column member 11, but the material used for the column member 11 is a seam in the vertical direction in the installed state. There is no limitation as long as the through pillar 10 has a predetermined cross-sectional shape (120 mm × 120 mm or more). For example, each column member may have a rectangular cross section as long as the widths of the side surfaces in contact with each other are the same, or a laminated material may be used instead of a solid material.

  As shown in FIG. 2, the column members 11 are integrated with each other by fastening two column members 11, 11 that are in contact with each other through a plurality of coupling bolts 13, 13 passing through both column members 11, 11. To do. That is, in this embodiment, the column member 11a and the column member 11b are fastened by the coupling bolts 13 and 13 that penetrate both, and the column member 11a and the column member 11c are fastened by the coupling bolts 13 and 13 that penetrate both. The three pillar members 11, 11,... Are integrated by wearing.

  Further, as shown in FIG. 3A, mortises 12 for joining to the body insert 2 are formed in the column members 11b and 11c only on the side surface opposite to the contact surface with the column member 11a. Has been. Further, when the mortise 12 is formed in the column member 11a, as shown in FIG. 3B, it is formed only on one side opposite to the contact surface with the column member 11b or the column member 11c. . That is, in the through-column structure 1, the mortise 12 formed for joining the torso 2 or the like is formed only on one side of one column member 11, and the column member in which the mortise 12 is formed. 11 is integrated in a state where the side surface opposite to the side surface where the mortise 12 is formed is in contact with the side surface of the other column member 11.

  As shown in FIG. 4, the hole-down hardware 20 is a pentagonal steel plate including one right angle, and is erected from a bottom plate 21 laid on the upper surface of the foundation and two sides that intersect the right angle of the bottom plate 21. Two vertical plates 22 and 22, which are two pentagonal steel plates that intersect each other at right angles and are formed in a square shape in plan view, are integrally joined by welding. The shapes of the bottom plate 21 and the vertical plate 22 are not limited to pentagons, and may be set as appropriate.

  The hole-down hardware 20 is an anchor formed in advance on the bottom plate 21 by four anchor bolts 24, 24,... Embedded in the foundation 3 so that the head protrudes from the upper surface of the foundation 3 when the foundation 3 is constructed. .. Are fixed to the foundation 3 by being inserted through insertion holes (not shown) formed according to the arrangement of the bolts 24, 24,. Here, it goes without saying that the type and number of anchor bolts for fixing the hole-down hardware 20 are not limited.

  As shown in FIG. 2, the through pillars 10 are erected on the upper surface of the bottom plate 21 (the surface opposite to the contact surface with the foundation 3), and the bolt holes 22 a ( 4) and is fixed to the hole-down hardware 20 by a fixing bolt 23 that penetrates the lower end of the column member 11 (the column member 11b or the column member 11c). Here, a recess that can accommodate the head of the anchor bolt 24 is formed at a position corresponding to the head of the anchor bolt 24 at the lower end of the through pillar 10 and the tip of the base 4. When it is placed on the upper surface of the bottom plate 21, no rattling occurs. Among the anchor bolts 24 for fixing the bottom plate 21, the anchor bolts 24 arranged at the locations corresponding to the tips of the base 4 are in a state where the protruding portion from the base 3 is elongated and protruded from the upper surface of the base 4. It is good also as a structure to fasten.

  The torso 2 is a member that supports the floor (not shown) of the second floor portion of the building A. In the present embodiment, as shown in FIG. It is installed. As shown in FIG. 2, tenons 2 a for joining with the through-column structure 1 are formed at both ends of the trunk 2.

As shown in FIG. 2 and FIG. 3, the through-column structure 1 and the case 2 are joined at the tip of the case 2 in a mortise 12 formed in the column member 11 on the side of the case 2 to be joined. This is done by inserting a tenon 2a.
In the present embodiment, for the purpose of more firmly joining the through column 10 and the body insert 2, as shown in FIG. 3A, the joint bolt is formed with a joint composed of a mortise 2 a and a mortise 12. 14 to fix.

The joining bolt 14 passes through the two column members 11, 11 from a portion corresponding to the mortise 12 on the surface opposite to the joining surface of the through-column 10 with the trunk 2, and then the tip of the trunk 2. It is fastened at. In other words, a tightening hole 2b having a depth corresponding to the position of the joining bolt 14 is formed at the tip of the barrel 2 and penetrates through the column members 11 and 11 and the tip of the barrel 2 to tighten. The joining bolt 14 protruding into the attaching hole 2b is fastened with a nut in the fastening hole 2b.
Note that the joining bolts 14 and 14 corresponding to the plurality of body inserts 2 and 2 joined from different directions are arranged at positions shifted vertically. Further, as shown in FIG. 3B, when the two barrels 2, 2 are joined to the through pillar structure 10 from the direction facing each other, the joining bolt 14 disposed in a state of penetrating the through pillar 10. Are fixed by fastening them in fastening holes 2b and 2b formed in the two barrels 2 and 2, respectively.

  As shown in FIG. 1, the through column structure 1 and the eaves beam 6 are joined by fixing the eaves beam 6 on the upper end of the through column structure 1. At this time, the eaves beams 6 and 6 extending from the two directions are fixed at the upper end of the through pillar structure 1 in a state where the tip of the other eave beam 6 is in contact with the side surface of one eave beam 6.

  Further, a beam member (not shown) is joined to the through-pillar structure 1 as necessary via a joint (a tenon 2a and a tenon hole 12) in the same manner as the case 2.

The configuration of the through pillar 10 may be appropriately changed according to the installation location of the through pillar structure 1 and the direction and number of cross members (such as the barrel 2 and beams) connected to the through pillar structure 1.
For example, in the case where the through pillar structure 1 is arranged not in the corner of the building A but in the middle part, the case guides 2 and 2 are joined from two opposite directions, and the direction perpendicular to these case guides 2 and 2 In the case where the beam 2 'is joined to each other, as shown in FIG. 5 (a), the arrangement of the column members 11, 11,... Two column members 11b and 11c, and one column member 11a having a side surface in contact with the side surface orthogonal to the joint surface between the two column members 11b and 11c in a state of straddling the joint surface, May be formed in a convex shape in sectional view. In this case, mortise holes 12 and 12 are formed on the side surfaces opposite to the joint surfaces of the column members 11b and 11c, corresponding to the mortises 2a and 2a formed at the ends of the barrels 2 and 2, respectively. Further, a mortise 12 is formed on the side surface of the column member 11a opposite to the contact surface with the two column members 11b and 11c, corresponding to the tenon 2a 'formed at the tip of the beam 2'. Has been.

  Further, when the through pillar structure 1 is formed as a so-called large black pillar in the center portion of the building A and the beams 2 ′, 2 ′,... Are joined from four directions, as shown in FIG. The through pillar 10 may be constituted by five pillar members 11a to 11e. That is, the side surfaces of the column members 11a having the same cross-sectional shape are in contact with the side surfaces of the column member 11a having a square cross section at the center, and are integrated into a cross shape in a cross-sectional view. Thus, mortises 12, 12,... Corresponding to the beams 2 ', 2', ... are formed on the side surfaces of the column members 11b, 11c, 11d, 11e opposite to the contact surfaces with the column member 11a. . Thereby, in the through column structure 1 to which the cross member is connected from four directions, the mortise 12 is formed only on the side surface in one direction with respect to one column member. Never become.

  As described above, according to the through-column structure 1 of the present embodiment, the through-column 10 is constituted by the three column members 11, 11,..., So that it is stronger and more elastic than the conventional through-column. Therefore, it is excellent in earthquake resistance.

In addition, since the mortise for joining with the cross member (body insert 2) formed in the through column 10 is formed only on one surface with respect to one column member 11, the column member 11 is effective. The reduction in the cross-sectional area is small, and each column member 11 maintains the strength as the through column 10.
Moreover, since the column member 11 in which the mortise 12 is formed is reinforced by the other column member 11 from the opposite side surface in which the mortise 12 is formed, the formation location of the mortise 12 may be a weak point. In addition, the tenon 2a does not fall out of the mortise 12 due to the bending of the through column 10 in this portion.

  In addition, since the through column 10 and the cross member (body insert 2) are joined through the tenon 2a and the tenon hole 12, the joining property is excellent and the force transmission as a shaft assembly is excellent. Furthermore, since the joining bolt 14 reinforces the joining of the through column 10 and the cross member, a stronger joining is achieved.

  The through-column 10 constituted by the three column members 11, 11,... Can be firmly fixed to the foundation 3 by the hole-down hardware 20.

Heretofore, an example of a preferred embodiment has been described for the present invention. However, the present invention is not limited to the above-described embodiment, and the design of each of the above-described components can be appropriately changed without departing from the spirit of the present invention.
For example, in the above-described embodiment, a two-story building has been described. However, the application of the through-column structure according to the present invention is not limited to the two-story building, but any through-columns such as a three-story and four-story building. It is applicable to a wooden frame structure constructed using

  Moreover, in the said embodiment, although integration of column members (through columns) was performed via a bolt, it goes without saying that integration of a column member is not limited to fastening with a bolt. What is necessary is just to select suitably from a well-known fixing method, such as performing with a material.

  In the above embodiment, the through column 20 is fixed to the foundation 3 through the hole-down hardware including the bottom plate and the two vertical plates. However, the configuration of the hole-down hardware is not limited to the above. Needless to say, it may be appropriately fixed using a known hole-down hardware.

  Moreover, in the said embodiment, in the junction part of a through column and a cross member, it was assumed that it joined more firmly using a joining bolt, but a joining bolt should just be used as needed and does not necessarily use it. Also good. Further, it goes without saying that other well-known reinforcing members such as a beam receiver and a plate material may be used instead of the joining bolt.

It is a perspective view which shows a part of building using the through pillar structure of this invention. It is a perspective view which shows the detail of the through pillar structure of this invention. It is a plane sectional view showing the through pillar concerning the through pillar structure of the present invention, and (a) shows the case where a cross member is joined from two directions, and (b) shows the case where a cross member is joined from three directions. . It is a perspective view which shows the hole down metal fitting concerning the through pillar structure of this invention. (A), (b) is a plane sectional view which shows the modification of the through pillar concerning the through pillar structure of this invention. It is a perspective view which shows the conventional through-pillar structure. (A) is a perspective view which shows the prior art example of the junction part of a pillar and a horizontal member, (b) is a perspective view which shows the other prior art example of the junction part of a pillar and a cross member.

Explanation of symbols

A building 1 through pillar structure 2 torso (cross member)
2 'beam (cross member)
2a mortise 3 foundation 10 through pillar 11 pillar member 12 mortise 13 coupling bolt 20 hole down hardware 21 bottom plate 22 vertical plate

Claims (6)

A through column formed by integrating a plurality of columnar members having a rectangular or square cross section in a state in which the side surfaces are in contact with each other;
A through pillar structure comprising a hole down hardware that is a connector for fixing the lower part of the through pillar to the foundation,
A mortise is formed in the through-pillar corresponding to the tenon of the cross member joined from at least two directions,
The mortise is formed only on one side of one column member,
A through-column structure in which the column member in which the mortise is formed has a side surface opposite to the side surface in which the mortise is formed in contact with a side surface of another column member. The through-column is composed of three column members, and the side surfaces of the other column members are in contact with the two side surfaces orthogonal to each other of the one column member, so that the cross-sectional shape is formed in a letter shape.
2. The through-column structure according to claim 1, wherein the mortise hole is formed on a side surface of the other column member opposite to a contact surface with the one column member. The hole down hardware is
A polygonal steel plate including at least one right angle, and a bottom plate laid on the upper surface of the foundation;
Two vertical plates that are erected from two sides that intersect at right angles of the bottom plate and that intersect each other at right angles and are formed in a square shape in plan view are integrally formed,
The through pillar is erected on an upper surface of the bottom plate, the bottom plate is fixed integrally with the foundation, and the vertical plate is fixed to a side surface of the through pillar. The through-pillar structure according to claim 2. The through-column is composed of three column members, and the two column members joined to each other, and the side surface abuts on the side surface orthogonal to the joint surface between the two column members while straddling the joint surface The other pillar members are formed in a convex shape in cross-sectional view,
In the two column members, the mortise is formed on the side surface opposite to the joint surface,
The through-column structure according to claim 1, wherein the mortise hole is formed in the other column member on a side surface opposite to a contact surface with the two column members. The through pillar is composed of five pillar members,
Each side surface of one column member having a square cross section is formed in a cross-sectional cross shape by contacting the side surfaces of other column members having a rectangular cross section or a square shape.
A mortise is formed in the through-pillar corresponding to the tenon of the cross member joined from four directions,
The through-column structure according to claim 1, wherein the mortise is formed only on a side surface of the other column member opposite to a contact surface with the one column member.   The through-column structure according to any one of claims 1 to 5, wherein the through-column is integrated through a plurality of bolts penetrating at least two column members.

Images