JPH06330658A - Joint of concrete pillar body - Google Patents

Abstract

PURPOSE:To carry out the joint operation for the upper and lower concrete pillar bodies easily and speedily and secure the contribution to cost reduction. CONSTITUTION:At least a block-shaped half keyway 2a is formed on the surface of a joint metal fitting 3 which is integrally fixed at the edge part of a concrete pillar body 1. The half keyway forms a keyway 2 in opposed state, when the upper and lower concrete pillar bodies are joined, Then, a key 8 is tapping- inserted into the keyway, and the upper and lower concrete pillar bodies are joined firmly through integration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining concrete pillars, and more particularly to a method for joining concrete pillars so that upper and lower concrete pillars can be joined easily and quickly.

[0002]

2. Description of the Related Art Conventionally, a method for jointing concrete columns is formed by forming a groove on the outer peripheral end surface of a joint fitting fixed to the concrete columns, and stacking the upper and lower concrete columns to be joined together. The groove parts are welded to join the upper and lower concrete columns.

[0003]

In the above-mentioned conventional method of jointing a concrete pillar, the joint metal fitting fixed to the end of the concrete pillar must be welded to the groove over the entire circumference thereof. Therefore, a welder is required, a relatively long working time is required for welding, and further, it is affected by the weather,
Particularly, in rainy weather, it is difficult to perform the welding work, and there are often defects such as a delay in the construction period, which further causes a cost increase.

Therefore, there arises a technical problem to be solved in order to easily and quickly join the concrete pillars and to contribute to cost reduction, and the present invention aims to solve the problem. To do.

[0005]

The present invention has been proposed in order to achieve the above-mentioned object, and at least two or more pieces are provided on the surface of the joint fitting integrally fixed to the end of the concrete column. The block-shaped half key groove of
When stacking the upper and lower concrete pillars to be joined together, the key to be fitted in the key groove is inserted into the key groove formed by facing the half key groove provided in the joint metal fitting, and the concrete pillar is inserted. The present invention provides a method for joining concrete columns to join bodies.

[0006]

[Function] The upper and lower concrete columns to be joined have the joint fittings stacked on the joint surfaces. At this time,
By making the block-shaped half key grooves provided in the respective fittings face each other, the key grooves are formed by the two half key grooves. Therefore, a key corresponding to this key groove is tapped from the outer side surface of the key groove. In that case, the upper and lower concrete pillars are firmly joined by the key driven into the key groove. Moreover, since the keyway is formed at least in two or more places, the connection between the upper and lower concrete columns becomes extremely strong.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a partially cutaway front view showing the joining portions of the upper and lower concrete columns 1 and 1 to be joined. In FIG. 1, 2 is a key groove. The keyway 2 is bored on the respective inner and outer surfaces of the respective joint fittings 3, 3 that are integrally fixed to the concrete pillars 1, 1 at the respective end surfaces of the concrete pillars 1, 1. The half-key grooves 2a, 2a forming one half of the formed drum shape are formed to face each other. Thus, the keyway 2 is formed in a drum shape, but the shape thereof should not be particularly limited.

FIG. 2 is a plan view of the concrete columnar body 1, and FIG. 3 is a partially cutaway sectional view showing the joint portion of the concrete columnar body 1 taken along the line AB in FIG. Thus, in FIG. 1, the lower concrete pillar 1 to be joined is shown.
The fitting 3 of is shown. The fittings 3 are provided with holes 4 for hanging bolts for connecting to a plate (not shown) at 6 places, and further, PC steel materials 5 are provided at 6 places near the holes 4 for hanging bolts. Locking hole 6 for locking ...
... has been opened.

In the example shown in FIG. 2, the half key groove 2a is provided with 6 hanging bolt holes 4 ...
It is provided in each of the six places between ..., but the number should not be particularly limited as long as it is two or more. However, for example, in the case of two pieces, the points facing each other on the diameter of the fitting 3 or, in the case of three pieces, the apex portions of the equilateral triangle, in the case of four pieces, the square portions, and in the case of six pieces, the apex portions of the regular hexagons. It can be installed in

In FIG. 3, reference numeral 7 is an auxiliary band,
The auxiliary band 7 is made of a metal plate and fixed to the end of the concrete pillar 1. In addition, the locking hole 6 has a PC
The steel material 5 is inserted, and its head is locked in the locking hole 6 and tensioned. Further, in the figure, the half key groove 2a is
It can be seen that the surface of the fitting 3 is linearly formed from the outer surface to the inner surface. However, it should not be limited to this.

FIG. 4 is a front view of portion P in FIG. As shown in the figure, the half key groove 2a is provided in a shape corresponding to the lower half of the key groove 2. Therefore, the half key groove 2a provided in the joint fitting 3 of the concrete pillar 1 at the top is the key groove 2a. It is natural that the key groove 2 is formed in the shape of the upper half of 2, and the key groove 2 is formed when the two half key grooves 2a, 2a are joined together.

The key 8 fitted in the key groove 2 is formed symmetrically with the key groove 2 and is struck from the outer surface of the key groove 2 to form the upper and lower concrete pillars 1, 1. Those capable of firmly binding 1 are selected. Further, the key 8 can be fitted over the entire length of the key groove 2 and is formed in a taper shape with its longitudinal surface toward one end. In such a case, when the key groove 2 is tapped into the key groove 2 with the end face formed to have a slightly smaller diameter as the front, the end portion of the key 8 is first easily inserted into the end portion of the key groove 2. Is
After that, by hitting the key 8 into the key groove 2 with a hammer or the like, the upper and lower concrete columns 1 and 1 are integrally and firmly joined together.

The present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention extends to such modifications.

[0014]

As described in detail in the above-mentioned embodiment, the present invention has a block-shaped metal fitting that is fixed to the joint end faces of the upper and lower concrete columns to be joined. Since the half key groove is provided, the key is tapped into the key groove formed by facing the half key groove. Since at least two or more key grooves are provided, the upper and lower concrete columns are integrally and firmly joined together by the keys that are hit.

As described above, since the joining surfaces of the upper and lower concrete pillars do not require welding means as in the conventional case, the joining work is extremely easy, quick and reliable, and no welding is required. Since the invention is not affected by this, the invention does not have a delay in the construction period and contributes to cost reduction.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a joint between upper and lower concrete columns.

FIG. 2 is a plan view of a concrete pillar.

FIG. 3 is a partially cutaway cross-sectional view taken along the line AB of FIG.

FIG. 4 is a partially cutaway front view of a P portion of FIG.

FIG. 5 is a perspective view of a key.

[Explanation of symbols]

 1 Concrete pillar 2 Key groove 2a Half key groove 3 Fitting 8 Key

Claims (1)

[Claims] 1. An upper and lower concrete pillar body to be joined by forming at least two block-shaped half-key grooves on the surface of a joint fitting integrally fixed to an end portion of the concrete pillar body. When superimposing, on the key groove formed by facing the half key groove provided on the fitting,
A method for joining concrete columns, characterized in that a key to be fitted into the key groove is inserted to join the concrete columns.