JP2007285016A - Anchor bolt device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anchor bolt device easy in installation, capable of easily refastening even after installation, and capable of correcting settlement of a building without restoring a foundation. <P>SOLUTION: This anchor bolt device has a base part 3 embedded in the foundation 11 and composed of a tip screw part 7 of threading a female screw on an inner peripheral surface of a cylindrical body and a storage part 9 storing a spring 8 inside, an anchor bolt 2 of threading a male screw on the outer periphery threadedly engaging with the tip screw part 7, and a support nut 4 fixed to this anchor bolt 2. A lower end part of the anchor bolt 2 has the support nut 4 and a washer 5a, and is threadedly penetrated through the tip screw part 7, and is further inserted into the spring storage part 9, and maintains a state of being energized upward by the spring 8 by engaging with a spring upper end part, and is fixed to the anchor bolt 2 by fastening a sill 12 by the support nut 4 and an installation nut 6. The sill 12 is vertically moved by rotating the support nut 4 or rotating the anchor bolt 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an anchor bolt device that fixes a foundation of a building and its foundation and can easily correct a settlement of a building.

In general, a wooden or steel structure building has a foundation made of concrete or the like on the ground, and the building is placed on the foundation. However, there is a risk that the building will be displaced or detached from the foundation by receiving various forces from the surroundings such as gusty winds such as typhoons and shaking caused by earthquakes. In order to fix the building to its base part, the anchor bolt, which is a joint fitting, is used between the bottom of the building and the foundation to prevent the building from collapsing.
Conventionally, the fixing of the building to the foundation with the anchor bolt is generally completed by one-time fastening at the time of construction or reconstruction. However, after the building is completed, the base tree at the bottom of the building may shrink, deformation due to weathering or corrosion, deformation of the foundation such as concrete, or deformation of the ground on which the foundation is placed. In addition, the entire building may sink due to the settlement of the ground on which the foundation is placed. In particular, problems such as cracks in the walls and pillar beams of the building may occur if the building is tilted as a whole, or if a subsidence occurs where only a certain part of the building sinks, the wall of the building and the column beam may crack. There may be a need for subsidence correction that corrects horizontally.
Conventionally, anchor bolts that can be retightened after installation to correct the settlement of such buildings have been disclosed (Patent Documents 1 and 2).

However, with the above-mentioned anchor bolts, even if retightening is possible, in order to return an inclined building to its original state, not only retightening the anchor bolt but also repairing the foundation on which the building is placed There was a problem that it was difficult for the building to return completely level. Further, retightening the existing anchor bolts has a problem that the work is difficult because the weight of the building is heavily applied to the base on which the anchor bolt device is installed. Further, due to such problems, with the above anchor bolt, the anchor bolt alone cannot complete the settlement correction, and it is necessary to separately support the building using a hydraulic jack or the like.
JP-A-10-266586 JP 2002-371633 A

  The present invention has been made in order to cope with such a problem, is easy to install, can be easily retightened after installation, and fixes the foundation and foundation of the building. An object of the present invention is to provide an anchor bolt device capable of correcting the settlement of a building without repairing the foundation in the case of uneven settlement.

The anchor bolt device of the present invention is embedded in a base, and has a base threaded portion having a threaded end threaded on the inner peripheral surface of the tubular body and a tubular body spring accommodating portion fitted to the bottom of the distal end threaded part. And an anchor bolt device having an external screw threaded on the outer peripheral surface screwed to the tip screw portion and a support nut fixed to the anchor bolt, and a base of a building to be fastened to the foundation. The spring housing portion houses a spring therein, and the anchor bolt has one end of the support bolt and a washer screwed into the tip screw portion, and further inserted into the spring housing portion. Engaging with the upper end of the spring and maintaining the state of being biased upward by the spring, the support nut supports the base from the lower surface of the base, the upper end of the anchor bolt is passed through the base, Secure to the anchor bolt And wherein the vertically moving the base by rotation of has been rotated or anchor bolts of the support nut.
The spring housing portion is filled with a lubricant.

  In the anchor bolt device of the present invention, the lower end of the anchor bolt threaded through the distal end threaded portion of the base part pushes down the spring accommodated in the spring accommodating portion at the lower end of the distal end threaded portion, and maintains the state of being biased upward by the spring. However, in order to tie the foundation and foundation, when the building is tilted due to uneven settlement due to ground subsidence, etc., by rotating the support nut that is provided in the anchor bolt and supports the foundation, or by rotating the anchor bolt itself The foundation can be easily moved up and down, the building foundation can be lifted from the foundation and the building can be returned to the horizontal level, the anchor bolt device alone can fix the building foundation and the foundation, and the building It is possible to perform both settlement correction in the case of uneven settlement.

  Since the spring housing is filled with a lubricant such as grease and lubricating oil, not only can the anchor bolt device be fastened during construction, but also when the support nut is rotated after the anchor bolt device is installed. Or, when the anchor bolt is rotated, the operation can be easily performed.

  The anchor bolt device of the present invention will be described with reference to FIGS. 1, 2, and 3. FIG. FIG. 1 is an overall perspective view of the anchor bolt device of the present invention, and FIG. 2 is a cross-sectional view of the anchor bolt device. FIG. 3 is an assembly perspective view of the anchor bolt device.

As shown in FIGS. 1 and 2, the anchor bolt device 1 is installed between a foundation 11 constructed by concrete pavement or the like and a building base 12 placed on the foundation 11.
An anchor bolt device 1 according to the present invention inserts a rod-like anchor bolt 2 into a base 3 embedded in a base 11 by screwing, and further uses a support nut 4 and a mounting nut 6 via a washer 5 to form a base. 12 is fixed to the foundation 11.

As shown in FIG. 3, the structure of the base portion 3 embedded in the foundation 11 includes a tip screw portion 7 having an internal thread cut on the inner peripheral surface of the cylindrical body, and a lower portion fitted into the tip screw portion 7 and penetrating from the tip screw portion 7. It comprises a cylindrical spring accommodating portion 9 in which a spring 8 is accommodated.
Convex portions (7a and 7b) may be provided on the outer peripheral surface of the tip screw portion 7 or the spring storage portion 9, and can be firmly fixed when embedded in the foundation 11.
A spring 8 having an upper lid 10 a mounted therein is accommodated in the spring accommodating portion 9, and a lower portion of the spring 8 is bonded and fixed to a lower lid 10 b covering the spring accommodating portion 9.
As a spring used for the anchor bolt device 1 of the present invention, for example, a compression coil spring or the like can be used. Use springs with a large spring force to support heavy objects such as buildings.
Further, the spring accommodating portion 9 may have a structure filled with a lubricant. The entire inside of the spring housing portion 9 may be filled with a lubricant, or may be filled around the spring 8 that is housed. As the lubricant to be used, commonly used lubricants such as grease and lubricating oil can be used.
When the base 3 is embedded in the foundation 11, it is installed so that the upper surface 7 a of the tip screw portion 7 forms substantially the same surface as the upper surface of the foundation 11.

The rod-shaped anchor bolt 2 used in the anchor bolt device 1 of the present invention has a shape in which male threads are cut on the outer peripheral surfaces of both ends thereof, or a shape in which male threads are cut on the entire outer peripheral surface of the anchor bolt 2. Are used.
It is necessary to fix the support nut 4 for supporting the base 12 to the anchor bolt 2, and the support nut 4 is positioned between the both ends of the male screw of the anchor bolt 2 or at a position 2 a substantially in the middle of the anchor bolt 2. Is fixed.
When correcting the settlement of a building, the anchor bolt device 1 rotates the support nut 4 to move the base 12 up and down, and the anchor bolt 2 rotates on the top of the base 12 to move the base 12 up and down. is there.
In the method of the anchor bolt device 1 in which the settlement of the building is corrected by rotating the support nut 4, the anchor bolt 2 having a shape in which male threads are cut on the outer peripheral surfaces of both ends can be used. The support nut 4 is fixed to the bolt between the male screw cut at both ends, and the winding direction of each male screw may be the same direction or may be the opposite direction.
In the method of the anchor bolt device 1 in which the anchor bolt 2 is rotated on the upper surface of the base 12 to correct the settlement of the building, the male screws cut at both ends or the entire surface of the outer peripheral surface of the anchor bolt 2 are in the same direction. The support bolt 4 is fixed at a position 2a substantially in the middle of the anchor bolt 2. Further, in order to facilitate the rotation of the anchor bolt 2, the upper end portion of the anchor bolt 2 may be polygonal, preferably hexagonal.
As a kind of screw cut into the anchor bolt 2, a rolled screw or a cutting screw can be used.

  Moreover, as a material of each component which comprises the anchor bolt 2 and the anchor bolt apparatus 1, metals, such as iron, stainless steel, or a brass, can be used. It is preferable to use a stainless steel part because of its excellent mechanical strength and rust resistance.

  One end of the anchor bolt 2 is inserted into the tip screw portion 7 of the base portion 3 and is penetrated by screwing. The anchor bolt 2 is supported by the tip screw portion 7. The lower end portion of the anchor bolt 2 is further inserted into the spring accommodating portion 9 below the tip screw portion 7, engages with the upper lid 10 a above the spring 8, and pushes down the spring 8. The fastening of the anchor bolt 2 to the base 3 is fixed while maintaining the state of being biased upward by the spring 8.

  The upper end of the anchor bolt 2 fastened to the base 3 by screwing is inserted into the anchor bolt 2 hole formed in the base 12, and the base 12 is placed on the foundation 11. At this time, what fixes the support nut 4 to the position 2 a that supports the base 12 of each anchor bolt 2 is installed between the foundation 11 and the base 12. While supporting the base 12 via the washer 5a on the upper surface of the support nut 4, the support nut 4 is rotated to fasten and fix the anchor bolt 2 to the base 3. Finally, the upper end portion of the anchor bolt 2 protruding from the upper surface of the base 12 is locked by the mounting nut 6 via the washer 5 b, the anchor bolt 2 is fixed to the base 12, and the base 12 is fastened to the foundation 11.

  When the foundation 11 is constructed by concrete pavement or the like, the position where the anchor bolt device 1 is installed is determined, and the base 3 is embedded in the foundation 11 so that the screw traveling direction of the tip screw portion 7 of the base 3 becomes the vertical direction. At this time, it is preferable that the upper surface of the tip screw portion 7 of the base portion 3 is substantially flush with the surface of the base 11. Anchor bolts 2 are installed on the base 3. The lower end portion of the anchor bolt 2 to which the support nut 4 is fixed at the position 2 a that supports the base 12 is screwed into the tip screw portion 7 of the base portion 3. Here, the washer 5a is screwed so that it is on the base 12 side. The lower end of the anchor bolt 2 inserted into the tip screw portion 7 further reaches the inside of the spring accommodating portion 9 below the tip screw portion 7 and maintains the state where the upper cover 10a of the spring 8 is pushed down and biased upward by the spring 8. Conclude while.

A hole through which the anchor bolt 2 is inserted is drilled in the base 12 at a position corresponding to the position where the base 3 is embedded in the base 12 placed on the foundation 11. The upper ends of the anchor bolts 2 are inserted into the holes drilled in the base 12 and the base 12 is placed on the foundation 11. The anchor bolt 6 protruding from the upper surface of the base 12 is fastened with a mounting nut 6 via a washer 5b.
Further, the support nut 4 fixed to the anchor bolt 2 between the foundation 11 and the base 12 is rotated and fastened, and finally the base 12 is fixed to the anchor bolt 2 with the mounting nut 6 to thereby fix the anchor bolt device 1. Is completed, and the base 12 is tightly coupled to the foundation 11.
Here, the base 12 is installed horizontally with respect to the ground on which the building is placed.

  As another example of installing the anchor bolt device 1 of the present invention, an anchor bolt in which a support nut 4 is fixed to a position 2a that supports a base 12 at a substantially intermediate portion, which is externally threaded on the outer peripheral surface in the same direction. 2 In the same manner as described above, the lower end of the anchor bolt 2 is inserted into the distal end threaded portion 7 and the spring accommodating portion 9 by screwing and fastened, and the upper end of the anchor bolt 2 is inserted into the hole drilled in the base 12. The anchor bolt device 1 is installed by placing the base 12 on the foundation 11, and further fastening the anchor bolt 2 on the upper surface of the base 12 and locking it with the mounting nut 6 to fix the base 12 to the anchor bolt 2. The foundation 12 is tightly coupled to the foundation 11 when completed.

  The number of anchor bolt devices 1 installed depends on the size of the building and the environment in which the building is placed. The location of the anchor bolt device 1 is close to the pillar of the building base, and the place before and after the foundation constructed of concrete is interrupted. An appropriate number is arranged at an appropriate interval according to the situation. In addition, the anchor bolt device of the present invention corrects subsidence so that the entire building becomes horizontal when, for example, the building undergoes subsidence due to ground subsidence or the like. It is necessary to arrange them in a well-balanced manner throughout the foundation.

  In the case where the building has undergone uneven settlement, the anchor bolt device 1 in the vicinity of the portion where the uneven settlement has occurred is corrected. The mounting nut 6 that fixes the base 12 to the anchor bolt 2 of the anchor bolt device 1 is loosened, and the support nut 4 is rotated upward. Alternatively, the anchor bolt 2 itself is rotated and loosened. Since the fastening of the anchor bolt 2 to the base portion 3 is always maintained in a state of being urged upward by the spring 8, the support nut 4 or the anchor bolt 2 can be easily rotated. The base 12 supported by the support bolt 4 fixed to 2 is pulled upward from the foundation 11. A plurality of anchor bolt devices 1 installed on the building base 12 are respectively corrected, and the entire building base 12 is corrected horizontally with respect to the ground.

  An embodiment of an anchor bolt device of the present invention will be described with reference to the drawings. 4 and 5 are cross-sectional views illustrating an embodiment of the anchor bolt device of the present invention.

  FIG. 4 is a cross-sectional view illustrating an example in which the anchor bolt device 1 is installed. FIG. 4 illustrates a case where the anchor bolt device 1 is installed in order to fix the base 12 of the wooden building to the foundation 11. The anchor bolt device 1 is assembled by the method described above, and fixes a building base 12 placed on a foundation 11 via a packing 15 or the like. A plurality of anchor bolt devices 1 are installed on the entire foundation 12 of the building. As shown in FIG. 4, it is preferable to install the anchor bolt device 1 particularly near the pillar 13 of the foundation 12. When the settlement of the building is corrected, the mounting nut 6 is loosened, the support nut 4 fixed to the anchor bolt 2 is rotated, and the base 12 is pulled upward.

  FIG. 5 is a diagram for explaining another example in which the anchor bolt device 1 is installed. FIG. 5 illustrates a case where the anchor bolt device 1 is installed to fix the foundation 12 of the steel building to the foundation 11. The anchor bolt device 1 is assembled by the above-described method, and fixes the foundation 12 of the building placed on the foundation 11 via the foundation stone 14 or the like. A plurality of anchor bolt devices 1 are installed on the entire base 12 of the building. As shown in FIG. 5, it is preferable that the anchor bolt device 1 be installed on the base 12 near the steel column 13 where the load of the entire building is concentrated. In this case, it is preferable to install a plurality of anchor bolt devices 1 near the steel column 13. When the settlement of the building is to be corrected, the mounting nut 6 is loosened, the anchor bolt 2 is further rotated and loosened, and the base 12 supported by the support nut 4 fixed to the anchor bolt 2 is pulled upward.

  The anchor bolt device according to the present invention can keep the foundation and the foundation tightly connected regardless of the type and form of the foundation of the building, and always maintains the state of being biased upward by the spring housed in the base. Therefore, the anchor bolt device can be easily installed and modified, and can be suitably used as an anchor bolt device for subsidence correction in general wooden and steel buildings including ordinary houses.

It is a whole perspective view of the anchor bolt device of the present invention. It is sectional drawing of the anchor bolt apparatus of this invention. It is an assembly perspective view of the anchor bolt device of the present invention. It is sectional drawing explaining embodiment of the anchor bolt apparatus of this invention. It is sectional drawing explaining embodiment of the anchor bolt apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anchor bolt apparatus 2 Anchor bolt 3 Base part 4 Support nut 5 Washer 6 Mounting nut 7 Tip screw part 8 Spring 9 Spring accommodating part 10 Lid 11 Foundation 12 Base 13 Pillar 14 Foundation stone 15 Packing

Claims (3)

A base portion embedded in a foundation and having a tip threaded portion in which an internal thread is cut on an inner peripheral surface of the cylindrical body, and a spring housing portion of the cylindrical body that fits in a lower portion of the leading end thread portion; An anchor bolt having a male screw cut on the outer peripheral surface of both ends to be joined, and a support nut fixed to the anchor bolt between both ends of the male screw of the anchor bolt. An anchor bolt device that binds the foundation,
The spring storage portion stores a spring therein,
One end of the anchor bolt has the support nut and a washer, and is screwed into the tip threaded portion. Further, the anchor bolt is inserted into the spring accommodating portion, engaged with the upper end of the spring, and urged upward by the spring. Maintain the state
The support nut supports the base from the bottom surface of the base,
An anchor bolt device, wherein an upper end of the anchor bolt is passed through the base, and the base is moved up and down by rotation of the support nut. A base portion embedded in a foundation and having a tip threaded portion in which an internal thread is cut on an inner peripheral surface of the cylindrical body, and a spring housing portion of the cylindrical body that fits in a lower portion of the leading end thread portion; An anchor bolt device for fastening a foundation of a building to a foundation, comprising an anchor bolt having a male thread on the outer peripheral surface to be joined, and a support nut at a substantially middle portion of the anchor bolt,
The spring storage portion stores a spring therein,
One end of the anchor bolt has the support nut and a washer, and is screwed into the tip threaded portion. Further, the anchor bolt is inserted into the spring accommodating portion, engaged with the upper end of the spring, and urged upward by the spring. Maintain the state
The support nut supports the base from the bottom surface of the base,
An anchor bolt device, wherein an upper end of the anchor bolt is passed through the base, and the base is moved up and down by rotation of the anchor bolt.   The anchor bolt device according to claim 1 or 2, wherein the spring accommodating portion is filled with a lubricant.

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