JPH0333324A - Fixing structure for ground sill - Google Patents

Abstract

PURPOSE:To prevent falling in of a washer when strong tightening of a nut applied thereto by laying, at the inside of a clearance hole whereto an anchor bolt is inserted, a spacer provided with an eccentric hole over the anchor bolt so that the spacer can make free rotation. CONSTITUTION:A spacer 4 is put into a clearance hole 3 of a ground sill 2 whereto an anchor bolt 1 erected on a footing or the like is inserted, and an eccentric hole 5 bored to the spacer 4 is placed over the anchor bolt 1 so that the spacer can make free rotation around the bolt. The inside of the clearance hole 3 excepting the space occupied by the anchor bolt 1 is filled with the spacer 4. With existence of this spacer 4, bending deformation will not occur to a washer and the washer will not fall into the clearance hole 3 even by strong tightening of a nut applied to the anchor bolt 1. Thereby falling in of the washer can be prevented by simple structure and the ground sill can be fixed firm to the footing with right positioning.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention relates to a base mounting structure.

[Prior Art] Conventionally, foundations installed on top of foundations, etc., are fixed by inserting anchor bolts into bolt insertion holes provided in the foundation and tightening nuts screwed into the anchor bolts. there were.

In this case, the port insertion hole is generally formed into a hollow hole so that the port can be inserted while corresponding to the position of the 7-car port.

[Problem to be solved by the invention 1] However, in the conventional example described above, when tightening the nut, there is a problem that sometimes when the nut is tightened through the washer, the washer bends and deforms and falls into the hole. was there.

The present invention is an attempt to solve the above-mentioned problems, and its purpose is that even if the hole in the base for joining the anchor bolt is a blank hole, the washer will bend due to tightening of the nut. To provide a base mounting structure in which a base can be mounted without being deformed and falling into a hole.

[Means for Solving the Problems 1] In order to achieve the above object, the foundation mounting structure of the present invention includes a hole 3 in the foundation 2 into which the anchor bolt 1 is inserted.
A spacer 4 is disposed inside, and an eccentric hole 5 provided in the spacer 4 is rotatably inserted into the anchor pole 1.

[Operation] The spacer 4 is installed in the hole 3 provided in the base 2 so that the anchor bolt 1 is inserted through the eccentric hole 5. By positioning the anchor bolt 1 in the eccentric hole 5 and installing the spacer 4 in the hole 3 in this way, the portion of the hole 3 other than the anchor bolt 1 is filled with the spacer 4. becomes.

[Embodiment] FIG. 1 is an exploded perspective view showing an embodiment of the present invention, in which a base 2 is connected via a nut 6 to an anchor bolt 1 protruding from a foundation or the like. In the illustrated embodiment, the upper stand 2 has an abbreviated cross-sectional shape with a vertical piece 2a and a horizontal piece 2b, and a bolt is inserted into the horizontal piece 2b placed on the upper surface of the foundation. A hole 3' is provided. When inserting the anchor bolt 1 into this bolt insertion hole 3',
The diameter of the hole 3 is larger than that of the anchor bolt 1 so that the anchor bolt 1 can be inserted while adjusting the position I4 of the anchor bolt 1. Then, the base 2 has an anchor bolt 1 in the hole 3.
is inserted and fixed with a nut 6 via a washer 7 and a spring washer 8. At this time, a spacer 4 is placed in the hole 3 to close off the empty space except for the anchor bolt 1. It is. This spacer 4
In the embodiment illustrated in accordance with the shape of the hollow hole 3, it is formed into a disk shape, and an eccentric hole 5 into which the anchor bolt 1 is inserted in an eccentric state is provided near the end. be. The anchor bolt 1 is inserted into the eccentric hole 5 and installed in the hole 3 so as to be rotatable relative to the anchor bolt 1. At this time, the spacer 4 is installed in the hole 3 so that its upper surface is flush with the upper surface of the opening edge of the hole 3, that is, the upper surface of the horizontal piece 2b. As described above, the spacer 4 is rotatably inserted into the anchor bolt 1 through the eccentric hole 5, so that the anchor in the upper hole 3 shown in FIGS. 2, 3, and 4 By rotating it according to the position of bolt 1,
It is designed so that the installation state can be changed freely.
By bringing the end face of the spacer 4 into contact with the inner surface of the hole 3, the base 2 can be restrained in a positioned state.

Therefore, when installing the base 2, the base 2 is installed by inserting the anchor bolt 1 into the hole 3, the eccentric hole 5 is inserted through the anchor bolt 1, and the spacer 4 is installed inside the hole 3. do. Then, the anchor bolt 1 is inserted into the through hole 7a, the washer 7 is installed on the bottom hole 3 so as to cover the bottom hole 3, and the nut 6 is inserted through the spring washer 8.
is screwed onto the anchor bolt 1 and tightened, and the base 2 is fixed by tightening the nut 6.

At this time, tighten the nut 6 strongly and attach the washer 7 to the base 2.
When fixing, the presence of the spacer 4 in the portion of the hole 3 other than the anchor bolt 1 prevents the washer 7 from bending and deforming and falling into the hole 3 even if the nut 6 is strongly tightened. This allows the base 2 to be securely fixed without any problems.

In the illustrated embodiment, the spacer 4 is disk-shaped in accordance with the shape of the hole 3, but the spacer 4 is not limited to the disk shape, and may be in the shape of a pond.

[Effect of the invention 1] As described above, the present invention places a spacer in the hole in the base into which the anchor bolt is inserted, and the anchor bolt is rotatably inserted through the eccentric hole provided in the spacer. By installing a spacer in the blank hole so that the anchor bolt is positioned in the eccentric hole, the part of the blank hole except for the anchor bolt is filled with the spacer, and the anchor bolt can be screwed through the washer. Even if the assembled nuts are strongly tightened, the presence of the spacer prevents the washer from bending and deforming and falling into the hole. Since the spacer is rotatable and installed eccentrically, it is possible to fill as much of the hole as possible, and the end surface can be brought into contact with the inner surface of the hole to restrain the base in a positioned state. It is possible.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention, @ Fig. 2, Fig. 3
4 are plan views showing the installation state of spacers in each embodiment, in which 1 is an anchor bolt, 2 is a base, and 3 is a plan view showing the installation state of the spacer in each embodiment.
4 is a spacer, and 5 is an eccentric hole.

Claims (1)

[Claims] [1] A base mounting structure characterized in that a spacer is placed in a hole in the base into which an anchor bolt is inserted, and the anchor bolt is rotatably inserted through an eccentric hole provided in the spacer.