JP2003213803A - Column base structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize column base structure enhancing durability by preventing the deterioration of a column member caused by dew condensation of column base hardware in view of the possibility of impairing the durability of the column base structure and the earthquake resistance of a building due to decay fungi easily breeding in the column member containing moisture in the occurrence of such a phenomenon as to suck up moisture and to get stuffy at the lower end part of the column member close to the column base hardware by dew condensation on the surface of the column base hardware bound to a foundation. <P>SOLUTION: A heat insulating layer 2 formed of a plate member made of PVC or nylon resin with heat insulating property, waterproofness and high compressive strength is interposed between the bottom face of the column member 6 and the column base hardware 3 receiving the bottom face. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a column base structure of a wooden building.

[0002]

2. Description of the Related Art Conventionally, in a wooden building, a column base structure is generally used in which a base made of wood is mounted on a foundation such as reinforced concrete, and a pillar made of wood is erected on the base. Was adopted. However, in the previous Great Hanshin Earthquake, there were many reports of damage caused by columns pulling out from the base, and a stronger column base joint structure was required.

In order to solve such a problem, the applicant of the present invention has conducted extensive research on a column base structure in which a base material is erected directly on the foundation through a column base metal fitting without interposing a foundation between the foundation and the column. , Is trying to put it into practical use.

In this column base structure, the column base metal member 3 is fixed to a foundation 73 as shown in FIGS.
The column member 6 is joined via the. FIG. 4 is a vertical sectional view of the column base metal 3, and FIG. 5 is a vertical sectional view in a sectional direction orthogonal to FIG.

The column base metal fitting 3 comprises a pedestal portion 4 and an upright piece 5 which are integrally formed of steel.

The pedestal portion 4 is an upper bottom plate 4 having a predetermined thickness.
1 and the lower bottom plate 42, the upper bottom plate 41 and the lower bottom plate 42 are joined at a certain distance in the vertical direction via a connecting portion 43 joined in a cross shape in a top view. Upper bottom plate 41
Is formed in such a size that it can come into contact with the entire lower end surface of the pillar member 6 and support it, and the lower end surface of the pillar member 6 is received on the upper surface thereof. On the other hand, the lower bottom plate 42 is formed in substantially the same shape as the upper bottom plate 41, and has a plurality of bolt fixing holes 42b into which the upper end portions of the anchor bolts 74 embedded in the foundation 73 can be inserted. Further, the upper bottom plate 41 is appropriately provided with a notch portion 41a immediately above the bolt fixing hole 42b so as to facilitate the fastening of the anchor bolt 74 and the nut 75 inserted through the bolt fixing hole 42b. .

The upright piece 5 is erected on the upper surface side of the upper bottom plate 41 of the pedestal portion 4. The upright piece 5 is a plate-like body having a lateral width corresponding to the width of the pillar 6, and is fitted into a slit 61 provided at the lower end of the pillar 6. Further, the upright piece 5 is provided with a plurality of mounting holes 51.

Such a column base metal fitting 3 is tightly connected to the foundation 73 by placing the pedestal portion 4 on the foundation 73 and fastening a nut 75 to the anchor bolt 74 inserted through the bolt fixing hole 42b. .

The column member 6 is erected on the column base metal member 3 by inserting the upright piece 5 of the column base metal member 3 tightly connected to the foundation 73 into the slit 61. At this time, the bottom surface of the pillar material 6 is
It contacts the upper surface of the upper bottom plate 41. Further, a pin insertion hole 62 and a bolt insertion hole 63 are provided in advance on the side surface of the pillar member 6. These pin insertion hole 62 and bolt insertion hole 63
Are formed at positions that respectively match the mounting holes 51 of the upright pieces 5 fitted in the slits 61 when the pillar member 6 is erected on the pillar leg metal member 3. Then, from the side surface of the pillar member 6,
By fitting the drift pin 71 into the pin insertion hole 62 and fitting and fixing a fastening tool such as a bolt 72 into the bolt insertion hole 63, the column member 6 is tightly connected to the column base metal piece 3.

[0010]

In the column base structure as described above, since the column base metal member made of steel has a large heat capacity like concrete, it has a characteristic that it is hard to heat and hard to cool. As is well known, the ground shows a stable temperature throughout the year as compared with the temperature fluctuation of the outside air. Due to this effect, the space under the floor is cool in summer and warm in winter. For this reason, in the early spring season or the rainy season, when the outside air, which is hotter and more humid than the underfloor temperature and humidity, enters the underfloor space, dew condensation may occur on the surface of the column pedestal having a low temperature due to the influence of the ground.

A particular problem is in the vicinity of the contact portion between the column base metal member and the column member. Since the pillars are made of wood, they have high hygroscopicity. Therefore, when dew condensation occurs on the surface of the column base metal, the column material may absorb the moisture, or the lower end portion of the column base may be peeled due to the moisture on the surface of the column base metal. In any case, decay fungi are likely to propagate at the lower end of the column material containing moisture, and if it deteriorates, the durability of the column base structure and the earthquake resistance of the building may be impaired.

The present invention has been made in view of the above points, and an object of the present invention is to prevent the pillar material from decaying due to the surface dew condensation on the pillar pedestal, thereby improving durability and earthquake resistance. It is to realize an excellent high-strength column base structure.

[0013]

In order to achieve the above-mentioned object, the present invention has a heat insulating layer interposed between the bottom surface of a column made of wood and a column pedestal fixed to a foundation. Is characterized by.

According to the present invention, thermal insulation between the bottom surface of the column member and the column pedestal can be achieved. Here, the wood material
In addition to general wood, it includes general materials such as laminated wood and composite materials of wood and other materials with wood or its processed products as the main material.

The heat insulating layer is particularly preferably a plate material made of vinyl chloride or nylon resin.

In this case, thermal insulation between the column base metal member and the column member can be achieved, and it is possible to prevent the column member from absorbing moisture and humidity from the lower end portion thereof.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a column base structure according to the present invention will be described below with reference to the drawings. In addition,
Since the structure and the tight connection structure with the foundation of the pillar pedestal are almost the same as those described in the above-mentioned conventional technique,
The detailed description is omitted here. Further, the same components as those in the conventional technique will be described using the same reference numerals.

1 and 2 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view in a sectional direction parallel to an upright piece 5 of a column base metal piece 3, and FIG. 2 is a sectional direction orthogonal to FIG. Each of the vertical sectional views is shown.

In the column base structure 1 of the present invention, the heat insulating layer 2 is interposed between the bottom surface of the column member 6 made of wood and the column base metal member 3 fixed to the foundation 73. As described above, the column base metal fitting 3 is provided with the upright pieces 5 on the upper surface side of the upper bottom plate 41, and the upright pieces 5 are fitted into the slits 61 formed in the column member 6. In the present embodiment, the heat insulating layer 2 is provided on the upper surface of the upper bottom plate 41 with which the bottom surface of the upright pillar member 6 abuts.

The heat insulating layer 2 is formed by sticking a plate material having a predetermined thickness on the upper surface of the upper bottom plate 41 of the column base metal piece 3. Here, a plate material made of vinyl chloride resin (PVC) is used for the heat insulating layer 2. The heat insulating layer 2 made of this vinyl chloride resin has excellent heat insulating properties and waterproof properties, and has a large compressive strength. Therefore, even if dew condensation occurs on the surface of the column base metal article 3, it is possible to prevent the column material 6 from sucking up moisture or humidity from the bottom surface. The material used for the heat insulation layer 2 is not limited to vinyl chloride resin, and has excellent heat insulation and waterproof properties,
Other materials having high compressive strength, for example, plate material or foam such as nylon, polypropylene, polyethylene, synthetic rubber, or wood impregnated with a preservative may be used.

With the above structure, in the column base structure 1, the bottom surface of the column member 6 and the column base metal fitting 3 tightly bound to the foundation 73 are thermally insulated, and the dew condensation water generated on the surface of the column base metal fitting 3 is provided. It is possible to prevent the pillar material 6 from sucking up the above. As a result, it is possible to prevent the lower end portion of the column member 6 from decaying and to provide a column base structure in which the durability of the column member 6 is improved.

Incidentally, the column base metal fitting 3 shown in the present embodiment
4 has mounting holes 51 evenly arranged at four locations above the upright piece 5 and a mounting hole 51 for inserting a bolt, which is arranged at the center, like the one shown in FIG. The form of the pedestal metal fitting 3 constituting the present invention is not limited to this. Alternatively, as shown in FIG. 3 (a), the column base metal fitting 3 may have mounting holes 51 evenly arranged at four locations above the upright piece 5. Further, as shown in FIGS. 3B and 3C, the mounting holes 51 may be formed in the upright piece 5 at two positions or only one position, respectively. The number of such mounting holes 51 is appropriately determined according to the cross-sectional shape, size, required strength, and the like of the pillar member 6. Further, as shown in FIG. 3C, the upright piece 5 may be one in which two pieces are provided on the upper surface of the upper bottom plate 41 in parallel with each other at a predetermined interval. Further, the upper bottom plate 41 and the lower bottom plate 42 of the pedestal portion 4 are not limited to substantially square plate-like bodies, and may be rectangular or other shaped plate-like bodies having a predetermined thickness. Is selected according to the cross-sectional shape of. Further, the shape of the connecting portion 43 may be a cross shape in a top view as shown in FIG. 3A, or an X shape in a top view as shown in FIGS. 3B and 3C. It may be a shape.

[0023]

As described above, the column base structure according to the present invention has the thermal insulation layer interposed between the bottom surface of the column member and the column base metal member fixed to the foundation. It is possible to achieve heat insulation between the column material and the column material, and prevent moisture from being sucked up from the mouth of the column material. As a result, even when dew condensation occurs between the column material and the column pedestal, it is possible to prevent the column material from decaying due to dew condensation, and a high-strength rational column base structure can be obtained, and the column material, As a result, the durability of the wooden construction using the column base structure of the present invention can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a column base structure according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a column base structure according to the present invention.

FIG. 3 is a perspective view showing another example of the configuration of the column base metal member.

FIG. 4 is a vertical cross-sectional view showing a conventional column base structure.

FIG. 5 is a vertical cross-sectional view showing a conventional column base structure.

[Explanation of symbols]

1 column base structure 2 Thermal insulation layer 3 pillar leg hardware 4 pedestal 41 Upper and lower plate 41a Notch 42 Lower bottom plate 42b bolt fixing hole 43 Connection 5 Upright piece 51 mounting holes 6 pillar materials 61 slits 62 pin insertion hole 63 bolt insertion hole 71 Drift Pin 72 volts 73 Basic 74 anchor bolt 75 nuts

Continued front page    (72) Inventor Atsushi Iwamae             Sekisui Ha 1-88 Oyodo Naka 1-chome, Kita-ku, Osaka City             Inside Us Co., Ltd. F term (reference) 2E001 DB05 DD01 DH11 DH25 DH39                       FA02 FA21 FA71 GA12 HD11                       KA04 LA09                 2E125 AA03 AA45 AB12 AC01 AC23                       AG03 AG12 AG16 AG60 BB09                       BB16 BB22 BB36 BC09 BD01                       BD03 BE04 BE08 BF06 CA05                       CA14 CA79 EA22 EA25 EA26

Claims (2)

[Claims] 1. A column base structure, characterized in that a heat insulating layer is interposed between a bottom surface of a column member made of wood and a column base metal member fixed to a foundation. 2. The column base structure according to claim 1, wherein the heat insulating layer is a plate material made of vinyl chloride or nylon resin.