JP3871549B2 - Hole down position adjustment hardware - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint for a wooden building, and more particularly, to a hall down position adjusting hardware that allows a pillar and a foundation to be easily and securely connected via a base in a wooden building having two or more stories.
[0002]
[Prior art]
Conventionally, in wooden houses, when a horizontal load such as an earthquake or typhoon acts, a large pulling force (axial tensile force) is applied to one of the column bases of the column as a frame material that supports a rigid wall such as a seismic wall. Occurs (rocking phenomenon, etc.). In addition, a vertical force is generated in a pitching earthquake, and a pulling force is generated in the column base. For this reason, in order to prevent the phenomenon that the pillars are lifted and pulled out, an L-shaped steel plate attached plate (2000 Ministry of Construction Notification No. 1460, Table 3 (RO)), a V-shaped steel plate attached plate (2000 Ministry of Construction Notification No. 1460, Table 3 (ha)), attracted hardware (2000 Ministry of Construction Notification No. 1460, Table 3 (he) (and) (chi)), etc. are used.
[0003]
In addition, utility model registration No. 3022169 has been filed as a hardware similar to the present invention.
[0004]
As an example, the case where an attracting hardware is used will be described with reference to the drawings.
[0005]
FIG. 6 is a partial perspective view showing an example of pull-out prevention provided with the attracting metal 24. The base 21 is placed on a foundation 22 and an embedded anchor bolt 23 is drilled at a predetermined position. The column base 20 is fixed on the base, and a pulling metal fitting 24 is provided along the column base 20 and the base 21 at a fixed portion between the base 21 and the column base 20. The pulling metal fitting 24 is fixed to the column base 20 with a bolt 28, and is fixed to the base 21 and the foundation 22 using a nut 26 via an embedded anchor bolt 23.
[0006]
Accordingly, the base 21, the foundation 22, and the column base 20 are reinforced by the drawing metal fitting 24 to prevent the column base 20 from being pulled out from the base 21.
[0007]
In the case of utility model registration No. 3022169, the foundation is placed on the foundation, and the buried anchor bolt is drilled at a predetermined position. The column base is fixed on the base. A hole-down hardware is installed on the side surface of the column base, and the wooden building joint hardware according to the present invention is connected between the buried anchor bolt and the hole-down hardware. The embedded anchor bolt must be accurately embedded at a position 31 mm from the surface of the column, and high construction accuracy is required. For this reason, the buried anchor bolt may be displaced, and the position is corrected by using two pulling anchor bolts.
[0008]
[Problems to be solved by the invention]
As mentioned above, the L-shaped steel plate and V-shaped steel plate are not installed with the embedded anchor bolts embedded in the foundation, and only the column base and base are fixed, so they are strong. When a pulling force is applied to the column base, if a pulling force of about 1 ton is applied (when using an attachment plate or hole down hardware with a strength of 1.5 t or more), the base is fixed to the foundation. There is a risk that the foundation will shear in relation to other buried anchor bolts.
[0009]
When using an attracting metal, there is no risk of shearing, but the embedded anchor bolt is embedded during foundation work, and the base is placed on the foundation, causing a shift as described above. May end up. In that case, in the case of an attracting metal that has already been perforated, it is inconvenient to make an attracting object that matches the embedded anchor bolt (deformation using acetylene gas, etc.) when connecting to the embedded anchor bolt. Occurs.
[0010]
In the case of a wooden construction joint metal in utility model registration No. 3022169, it is designed so that the position correction with respect to the displacement of the buried anchor bolt is effective. In addition, it can be expected to be very strong compared to the above-mentioned hardware, but it is very expensive compared to other hardware because it uses two pulling anchor bolts, and the weight and installation during transportation. The volume of time increases (the inner wall capacity increases).
[0011]
The present invention has been made under the circumstances as described above, and the object of the present invention is to be fixed to a hole-down hardware and a base installed on the column base in order to counter the pulling force to extract the column base from the base. An object of the present invention is to provide a hole-down position adjusting hardware that can correct the position of the installation portion of the embedded anchor bolt and the hole-down hardware, and further reduce the cost, weight, and volume.
[0012]
The present invention relates to a hole down position adjusting hardware, and is fixed to a buried anchor bolt that is directly anchored to a building foundation, and whose upper end penetrates the base and protrudes on the base, and a column base that is erected at a predetermined position of the base. A metal fitting for wooden construction, which is interposed between
The wooden building joint metal is eccentric at a predetermined degree, and an upper end is attached to the hole-down hardware, a pulling anchor bolt, an annular eccentric adjustment hardware that is a means for loosely fitting the embedded anchor bolt, and attracted consists eccentric adjustment hardware annular is means for loosely anchor bolts, also has a parallel twin structure side surfaces are welded eccentric adjustment hardware of the two annular,
The distance between the center points of the two annular eccentric adjustment hardware and the eccentric distance of the pulling anchor bolt are the same;
An axial tension force is transmitted between the anchor bolt and the hole-down hardware by interposing and connecting between the embedded anchor bolt in an eccentric position on the plane and the bracket of the hole-down hardware. Is achieved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a hole-down position adjusting hardware in which an embedded anchor bolt and a column base are installed on a foundation via a base. The embedded anchor bolt installed on the foundation must be accurately embedded in the center of the base and at a position 31 mm from the pillar, and high construction accuracy is required. However, since the foundation is placed after the foundation is completed, the buried anchor bolt that satisfies the above conditions often shifts. At that time, using the embedded anchor bolt, it is possible to correct the position of both the eccentric positions on the plane in order to easily fix them to the column base, and to provide a hole-down position adjusting hardware which is inexpensive and has a small volume and weight.
[0015]
Hereinafter, a hole down position adjusting hardware according to the present invention will be described with reference to the drawings.
[0016]
1 and 2 are a perspective view and a side view showing an embodiment of a hole-down position adjusting hardware according to the present invention.
[0017]
The hole down position adjusting hardware 4 includes a known embedded anchor bolt 11 embedded in the foundation 5, a hole down hardware 2 fixed to the column base 1, a pulling anchor bolt 6 attached to the hole down hardware 2, and an embedded anchor. It is comprised from the eccentric adjustment metal fittings 7 and 8 which connect the volt | bolt 11 freely.
[0018]
Among these, the embedded anchor bolt 11 is a steel bar anchor having a diameter of φ16 mm and having a U-shaped hook formed at the lower end as shown in FIG. 1, and is threaded in a predetermined range at the upper end. In the form of the present embodiment, known dimensions and materials are used as certified standard products of the Japan Housing and Wood Technology Center. It goes without saying that the shape of the embedded portion can be any of various known shapes. The hole-down hardware 2 is also made of a known shape and satisfies the dimensions and materials as the above-mentioned standard equivalent products.
[0019]
As shown in FIGS. 5a and 5b, the hole down position adjusting hardware 4 includes eccentricity adjusting hardware 7 and 8 and a pulling anchor bolt. The eccentricity adjusting hardwares 7 and 8 have a parallel double structure in which the side surfaces of a thick steel pipe pipe having a predetermined length are welded together. Further, the pulling anchor bolt 6 is loosely fitted in one hole of the eccentric adjustment metal fittings 7 and 8, and the eccentric adjustment metal fittings 7 and 8 can be freely rotated around the pulling anchor bolt 6. The pulling anchor bolt 6 is eccentric in the horizontal direction, and rotates to correct the position of the joint portion between the buried anchor bolt 11 and the hole-down hardware 2, and the hole-down hardware 2 and the buried anchor bolt 11 are interposed. .
[0020]
Further, the hold-down position adjustment hardware 4, and the distance between the centers of the respective thickness steel pipe of the eccentric adjustment hardware 7,8, the same and an eccentric distance of the anchor bolt 6 drawn, embedded anchor bolt while maintaining as much as possible strength It is devised so that the position can be reliably corrected within a certain range with respect to 11 deviations. That is, when the distance between the pipe centers of the eccentricity adjusting hardware 7 and 8 is P, it is devised so that the position can be reliably corrected as long as it is a positional deviation within a circle having a maximum radius of 2P. A threaded pulling anchor bolt 6 is used at the rod end, and the separation of the eccentricity adjusting hardware can be arbitrarily adjusted by adjusting the tightening degree of the nuts 10a and 10b. Therefore, the inner diameters of the pipes of the eccentric adjustment hardware 7 and 8 are Φ17 mm, and the embedded anchor bolts 11 of Φ16 mm can be inserted with a slight gap, and there is almost no play when inserted. Further, by setting the diameter of the pulling anchor bolt 6 to Φ16 mm, it is possible to unify the parts of the eccentricity adjusting hardware 7 and 8 and to realize cost reduction of the parts.
[0021]
A pulling anchor bolt 6 is loosely fitted to the thick steel pipe pipe portions of the eccentric adjustment hardware 7 and 8, and the upper end of the pulling anchor bolt 6 is fixed to the bolt hole of the bracket of the hole-down hardware 2 by a nut 9. The In addition, a brace is attached to the column base foundation joint through a bracing plate. Since the volume of the hole-down position adjusting hardware 4 is small, even if the embedded anchor bolt 11 and the pulling anchor bolt 6 are in the eccentric position, as long as they are within a predetermined eccentric distance, the strut and the hole-down position adjusting hardware 4 Can be attached at the same time, and the foundation 5 and the column base 1 can be tightly coupled together.
[0022]
FIG. 3 shows an example in which the embedded anchor bolt 11 and the pulling anchor bolt 6 are in different eccentric states. The embedded anchor bolt 11 and the pulling anchor bolt 6 are connected by using eccentric position adjusting hardware 7 and 8, whereby the column base 1 is directly coupled to the foundation 5. It is preferable to set the mounting position of the hole-down hardware 2 so that the streak and the mounting position of the hole-down hardware 2 do not interfere with each other. When the hole-down hardware 2 is at a high position, it is preferable to appropriately change the positions of the eccentric position adjusting hardware 7 and 8 in which the pulling anchor bolt 6 and the embedded anchor bolt 11 are loosely fitted as necessary.
[0023]
FIG. 4 is an explanatory view schematically showing the positional relationship between the embedded anchor bolt 11 and the pulling anchor bolt 6. As shown in the figure, when the distance between the pipe centers of the eccentricity adjusting hardware 7 and 8 is P, the eccentric distance between the embedded anchor bolt 11 and the hole-down hardware 2 can cover a range up to 2P. For example, since the hatched portion is a position where it interferes with the column base 1, when the embedded anchor bolt 11 is located in this range, the actual anchor cannot be attached. It is necessary to deal with it by mounting.
[0024]
5a and 5b are partially enlarged views of the hole down position adjusting hardware. In FIG. 5b, eccentricity adjusting hardware 7 and 8 are manufactured using a steel pipe pipe (inner diameter φ23.2 mm) having a thickness of 2 mm. One of the steel pipes is loosely fitted with an eccentric pulling anchor bolt 6. The upper and lower ends of the pulling anchor bolt 6 are threaded, one is fitted to the hole-down hardware 2, and the other is adjustable to give flexibility and is loosely fitted to the eccentric adjustment hardware 7. When the embedded anchor bolt 11 having a diameter of 16 mm is loosely fitted in the bolt hole, the gap between the hole inner surface and the play is removed.
[0025]
In consideration of cost, strength, and viscosity, when iron (SS400, JIS-G3101) was used as a steel material, a strength of about 58.9 kN (about 6 t) was obtained even in the maximum eccentric state. This represents the same strength as the wooden building joint described in Utility Model Registration No. 3022169, and succeeded in cost saving, volume reduction, and load reduction.
[0026]
In addition, the numerical value described in a present Example is an index generally used, and will not be limited if it has the same effect.
[0027]
【The invention's effect】
As described above, according to the hole down position adjusting hardware according to the present invention, even when the construction accuracy of the anchor bolt embedded in the foundation is low, it is easily and securely connected to the hole down hardware, Can be tied. Further, the brace mounting position can be secured and the brace mounting can be easily performed.
[0028]
Furthermore, by reducing the number of parts compared to the conventional case, it has succeeded in cost saving, capacity reduction, and weight reduction, and problems such as thickening the wall after construction have been solved. However, the strength remains the same as before, and a hole down position adjustment hardware superior to the conventional one is provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of implementation of a hole-down position adjusting hardware according to the present invention.
FIG. 2 is a side view showing an example of implementation of a hole-down position adjusting hardware according to the present invention.
FIG. 3 is a schematic plan view showing an example of position correction by a hole-down position adjusting hardware according to the present invention.
FIG. 4 is a schematic plan view schematically showing position correction by a hole down position adjusting hardware according to the present invention.
FIGS. 5A and 5B are a side view and a front view of a hole down position adjusting hardware according to the present invention. FIGS.
FIG. 6 is a perspective view showing an example of implementation of a conventional attracting hardware.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Column base 2 Hole down hardware 3 Base 4 Hole down position adjustment metal 5 Foundation 6 Pulling anchor bolt 7 Eccentric adjustment hardware 8 Eccentric adjustment hardware 9 Nut 10 Nut 11 Embedded anchor bolt 12 Screw 20 Column base 21 Base 22 Foundation 23 Embedded anchor bolt 24 Withdrawal hardware 26 Nut 28 Screw

Claims (1)

A wooden structure that is anchored directly to the foundation of the building and has an upper end penetrating the base and protruding above the base, and a hole-down hardware fixed to a column base that is erected at a predetermined position on the base. A joint fitting for construction,
The wooden building joint metal is eccentric at a predetermined degree, and an upper end is attached to the hole-down hardware, a pulling anchor bolt, an annular eccentric adjustment hardware that is a means for loosely fitting the embedded anchor bolt, and attracted consists eccentric adjustment hardware annular is means for loosely anchor bolts, also has a parallel twin structure side surfaces are welded eccentric adjustment hardware of the two annular,
The distance between the center points of the two annular eccentric adjustment hardware and the eccentric distance of the pulling anchor bolt are the same;
An axial tension force is transmitted between the anchor bolt and the hole-down hardware by interposing and connecting between the embedded anchor bolt in an eccentric position on the plane and the bracket of the hole-down hardware. Hole down position adjustment hardware characterized by that.

Images