JPH05321270A - Column leg fixing device - Google Patents

Abstract

PURPOSE:To execute works certainly and easily by forming a bolt hole in a base plate with such a large dia. as to absorb the error in the position of an anchor bolt and fixing a projection on the undersurface of the base plate using a binding material provided in a recess in the foundation. CONSTITUTION:A projection 6 consisting of a short square pipe, etc., is provided on the rear surface of a base plate 2, and a mortar flowing hole 7 is formed at the side face of this projection 6. The dia. of each bolt hole 3 in the base plate 2 is as large as capable of absorbing the error in the installed position of each anchor bolt 12. A box-shaped recess 13 is formed between anchor bolts 12 in the foundation 11. Anchor bolts 12 are inserted through the holes 3 in the base plate 2, and a pedestal 1 is installed on the foundation 11 and fastened by nuts 15 through washers 8. The recess 13 is filled with a binding agent 14 such as mortar so as to bind fast the prosecution 6, and thereby a slipping force in the horizontal direction is borne. This allows fixing the pedestal in place easily, for example without bending anchor bolts at the site.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing a column base to an anchor bolt of a foundation.

[0002]

2. Description of the Related Art Conventionally, as a means for fixing a pedestal to an anchor bolt of a foundation, a base plate is welded to the lower end of the pedestal, and an anchor bolt is inserted through a bolt hole formed in the base plate to fix the anchor. It is performed by tightening with a nut screwed into the tip of the bolt. In this case, the hole diameter of the bolt hole of the base plate is set to plus 1.0 mm to the outer diameter of the anchor bolt according to the steel structure standard, so that the resistance to horizontal sliding force does not decrease. There is.

[0003]

Anchor bolts are installed by embedding them in basic concrete before fixing the column base. Of course, this anchor bolt is supposed to be accurately positioned and installed with respect to the predesigned bolt hole position of the column base. However, no matter how carefully the positioning is performed, it is extremely difficult to install it accurately within the allowable range of 1.0 mm. Also,
Even if the anchor bolt is installed at the correct position,
Generally, the upper ends of the pillars are connected to each other in the horizontal direction, and if the distance between the pillars connected by this horizontal member is not accurate, similarly, the anchor bolt cannot be inserted into the bolt hole of the pillar. It will be.

For these reasons, conventionally, the anchor bolt is abnormally bent in accordance with the position of the bolt hole on the column side, or the bolt hole is unduly enlarged on site, and such an error occurs. The reality is that they are being dealt with, which causes problems in structural capacity.

The present invention eliminates such a conventional inconvenience and absorbs the positional deviation between the anchor bolt and the bolt hole of the base plate of the column base, and at the same time, does not cause a problem in structural strength. The purpose of the invention is to provide a leg fixing device.

[0006]

In order to solve the above-mentioned problems, according to the present invention, in a column base whose lower end is fixed by a foundation anchor bolt, a projection provided at the lower end of the column base is a recess formed on the upper surface of the foundation. It is characterized in that it is arranged inside and is solidified via a solidifying material filled in the recess.

[0007]

As described above, as to the sliding force in the horizontal direction,
Since it is supported by the protrusion at the lower end of the column base, the bolt hole of the column base through which the anchor bolt is inserted can be made larger than the allowable range stipulated in the steel structure standard, and thereby the anchor bolt The position error can be dealt with.

[0008]

FIG. 1 showing an embodiment of the present invention,
(1) is a column base consisting of a square pipe, and this column base (1)
A base plate (2) is welded to the lower end of the. Four bolt holes (3) (3) for anchor bolts are formed in the base plate (2) so as to be located at the corners of the virtual square. The base plate (2) is basically square, but its corners are cut off obliquely (4), and semicircular cutouts (5) (5) ... Are formed in the center of the cutout. There is. As shown in FIG. 4, on the back surface of the base plate (2), a short square pipe is welded at one end thereof to form a protruding portion (6) protruding below the column base (1). On the side surface of the protrusion (6), a mortar flow hole (7) described later is formed.

In FIG. 1, (8) is a washer installed corresponding to the bolt hole (3) of the base plate (1), and a bolt hole (9) is formed in the central portion thereof.

Reference numeral (11) is a basic concrete, and a pair of anchor bolts (12) and (12) project upward along the longitudinal direction of the basic concrete (11),
A box-shaped recess (13) is formed on the upper surface of the foundation (11) between the anchor bolts (12) (12). The recess (13) has a larger shape than the protrusion (6) protruding below the column base (1).

In this embodiment, the column base (1) is formed by using two anchor bolts (12) (12) in the longitudinal direction of the foundation (11).
Therefore, the bolt holes (3) of the base plate (2) also have a pair of bolt holes (3) along the arrangement direction of the anchor bolts (12) (12).
(3) is used.

In the above, the bolt hole (3) of the base plate (2) has a steel structure standard so as to absorb an error in the mounting position of the anchor bolt (12) with respect to the outer diameter of the anchor bolt (12). It is considered to be a large diameter hole that exceeds it. On the other hand, the bolt hole (9) of the washer (8) is formed with a diameter that meets its criteria.

Then, as shown in FIGS. 2 and 3, the anchor bolts (12) and (12) are inserted into the bolt holes (3) and (3) of the base plate (2) so that they are placed on the foundation (11). Install a column base (1) and a washer (8) on it
And install the base plate (2) with the nut (15) screwed into the tip of the anchor bolt (12). Thus, the anchor bolt (12) and the nut (15) are reliably supported against the upward pulling force to the column base (1). At that time, as shown in FIG. 3, the protruding portion (6) at the lower end is arranged in the concave portion (13) of the foundation (11), and the mortar or the like filled in the concave portion (13) afterwards is formed. It is solidified by a solidifying material (14), which supports the sliding force in the horizontal direction. In this case, as shown in FIG. 2, the semicircular notch (5) of the base plate (2) is located so as to correspond to each corner of the rectangular recess (13). As a result, four openings for filling the solidifying material are formed in this portion, and the solidifying material (14) is poured and filled from this portion as shown in this figure.

FIG. 4 shows another embodiment of the protrusion (6) in which a cross-shaped iron plate is welded instead of using a short square pipe. When the square pipe is used, it can be configured by penetrating the lower end of the column base (1) below the base plate (2).

[0015]

As described above, according to the present invention, the projecting portion provided at the lower end of the column base is solidly supported by the solidifying material filled in the concave portion of the foundation, whereby the sliding in the horizontal direction is performed. Since the structure is capable of resisting force, the bolt holes of the column bases through which the anchor bolts are inserted do not necessarily have to meet the steel structure standards, and the anchor bolts can be used with respect to their outer diameter. By using a large-diameter hole that can absorb the error in position, there is an effect that the column base can be easily fixed at a predetermined position without bending the anchor bolt.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing a method of fixing a column base.

FIG. 2 is a perspective view of a main part showing a fixed state of a column base.

FIG. 3 is a vertical cross-sectional view of the main part showing a fixed state of the column base.

FIG. 4 is a perspective view showing the lower end of the column base by turning it over.

FIG. 5 is a perspective view in which a lower end portion of a column base is turned upside down, showing another embodiment of the protruding portion.

[Explanation of symbols]

 (1) Column base (3) Bolt hole (6) Projection (12) Anchor bolt (13) Recess (14) Solid material

Claims (2)

[Claims] 1. In a column base whose bottom end is fixed by a foundation anchor bolt, a downward protrusion provided at the lower end of the column base is arranged in a recess formed in the upper surface of the foundation and filled in the recess. A column base fixing device characterized by being solidified via a solidifying material. 2. The bolt hole of the column base into which the anchor bolt is inserted is a large-diameter hole that can correspond to an error in the position of the anchor bolt with respect to the outer diameter of the anchor bolt. Column base fixing device.