JP2532929Y2 - Vertical buried hole forming jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention is a jig for forming a hole to be buried in advance when burying a vertical bar such as a handrail installed on a concrete ground such as a veranda or a balcony. It is about.

[Prior Art] Conventionally, a hole for burying a vertical bar such as a handrail installed on a concrete ground such as a veranda or a balcony is newly formed by drilling a hole in a concrete ground into which concrete is hammered, or forming a concrete. When pouring, insert a vertical rod directly into the hole, or insert a jig such as a rod of the same thickness as the vertical rod and pour it into the hole. The child was buried and the surrounding area was reinforced with mortar and the like.

[Problem to be solved by the invention] However, drilling a buried hole in concrete ground into which concrete has been poured not only impairs the strength of the concrete ground at the angle, but also requires time and labor for drilling work, and new renovation work It is not done except when doing. Also, when pouring concrete, directly burying the vertical and pouring concrete is a problem because it is difficult to vertically adjust the vertical and fix the adjusted vertical, and it is not possible to correct it after the concrete has solidified. was there. Furthermore, burying a jig such as a rod having the same thickness as that of a vertical rod and pouring concrete has a problem that it is difficult to pull out the rod when the concrete is solidified. For this reason, a jig having a tapered shape with a smaller diameter in the lower end direction was sometimes used, but the upper portion of the formed hole had a large diameter, so there was a problem with the strength of the vertical piece in the horizontal direction. was there.

The present invention is a jig for forming a hole for loosely inserting a buried portion of a vertical shaft before concrete is poured in when embedding the vertical shaft in concrete, and an upper opening of the formed hole has a wide diameter. In addition, it is an object of the present invention to obtain a vertical burial molding jig that can be easily pulled out after the concrete has solidified.

[Means for Solving the Problems] In the vertical hole embedding hole forming jig according to the present invention, when embedding the vertical member in concrete, the embedding hole for loosely inserting the embedded portion of the vertical member is previously set at the time of concrete driving. In a vertical burial hole forming jig to be formed, the jig is fitted with an outer cylindrical body (1) having an inner hole along a longitudinal direction by being inserted from an upper end of the inner hole of the outer cylindrical body (1) and integrated. The lower end of the outer cylinder (1) is sandwiched by a set of slits (12) divided from the lower end toward the upper end, At least one thick portion (13), which is thicker as it goes, is formed, and a part of the material of the outer cylinder (1) is changed to the inner cylinder (2).
The thick portion (13) can be expanded outwardly when it is inserted, and can withstand concrete pressure.

[Operation] In the present invention, the jig is constituted by an outer cylinder having an inner hole extending in the longitudinal direction, and an inner cylinder which is inserted into and integrated with an upper end of the inner hole of the outer cylinder. At least a part of the lower end of the cylindrical body is made of a flexible material, and the inner hole portion of the lower end made of the flexible material is shaped like a drawer toward the lower end, When the inner cylinder and the outer cylinder are integrated, the throttle-shaped portion at the lower end made of a flexible material is spread outward by the inner cylinder.

When pouring concrete, fix the lower end of the jig with this one part and the lower part of the jig widened, pour the concrete in, and when the jig is pulled out after the concrete has solidified, the integrated inner cylinder The lower end of the outer cylinder that has been pulled out and expanded from the outer cylinder returns to the original cylinder. For this reason, it can be easily pulled out from the solidified concrete ground, and a burying hole in which the upper portion of the opening for burying the vertical members is not wide is formed.

[Embodiment] FIG. 1 is a perspective view showing the configuration of an embodiment of a vertical buried hole forming jig of the present invention, FIG. 2 is a perspective view when the members shown in FIG. 1 are integrated, FIG. 3 is a top view of the outer cylinder shown in FIG. 1, FIG. 4 is a side sectional view of the outer cylinder shown in FIG.
FIG. 5 is a bottom view of the outer cylinder shown in FIG.

In the figure, there is an outer cylindrical body 1 made of resin and having a rectangular cylindrical shape having an inner hole 11 along the longitudinal direction, and an inner cylindrical body 2 having a shape that can be fitted from above the inner hole 11. At the lower end of the outer cylinder 1, there are two slits 12 on each side, and at the inner hole 11 side of the center part divided by the two slits 12, the wall is thickened toward the lower end. There is a thick part 13. Since the thick portion 13 is made of resin, it has flexibility and does not usually protrude to the outer surface of the outer cylinder 1, and has a substantially quadrangular prism shape. The upper end of the inner cylinder 2 has an upper edge portion 21 which is bordered by an outer shape larger than the inner hole 11 in order to prevent the entire inner cylinder 2 from being inserted into the outer cylinder 1 by insertion. There is a groove 14 at the upper part of the outer cylinder 1 for fitting with the jig holding frame 3. The jig holding frame 3 is further combined with an L-shaped jig fixing bracket 4 to fix the outer cylinder 1 to a predetermined position. In place.

When the outer cylindrical body 1 and the inner cylindrical body 2 are fitted and inserted, the inner hole 11 at the lower end of the outer cylindrical body 1 is formed by the thick portion 13 so as to be drawn toward the lower end. 2, the thick portion 13 is expanded outward.

FIG. 6 is a top view when the jig of the present invention is used, and FIG. 7 is a cross-sectional view of FIG.

In the figure, the jig holding frame 3 fitted in the groove 14 of the outer cylinder 1
Are attached to the L-shaped fixture 4 by two bolts 31.

At the time of concrete driving, the outer cylinder 1 and the inner cylinder 2 are inserted and integrated to form a thick portion 13 at the center of each side of the lower end.
As a jig that spreads out, concrete is poured by embedding the lower end of the jig. When the jig is pulled out after the concrete is solidified, the integrated inner cylinder 2 is pulled out of the outer cylinder 1, and the thick portion 13 at the lower end of the expanded outer cylinder 1 is replaced with the original cylinder. Return to For this reason, the outer cylinder 1 can be easily pulled out from the solidified concrete ground, and a burying hole in which the upper part of the opening for burying the vertical members is not wide is easily formed.

In this embodiment, the outer cylindrical body 1 and the inner cylindrical body 2 have a prismatic shape. However, the outer cylindrical body 1 and the inner cylindrical body 2 can take various shapes according to the cross-sectional shape of the embedded vertical bar. Further, the portion made of the flexible material at the lower end portion of the outer cylinder 1 may have any shape as long as it expands by the insertion of the inner cylinder 2, and the material and shape are not limited at all.

[Effects of the Invention] As described above, the present invention includes an outer cylinder body having a jig having an inner hole extending in a longitudinal direction and an inner cylinder body that is fitted and integrated from an upper end of the inner hole of the outer cylinder body. At least a part of the lower end portion of the outer cylindrical body is made of a flexible material, and an inner hole portion of the lower end portion made of the flexible material is formed in a drawing shape toward the lower end portion. Therefore, when the inner cylinder and the outer cylinder are integrated, the narrowed portion at the lower end made of a flexible material is spread outward by the inner cylinder.

When pouring concrete, fix the lower end of the jig with this one part and the lower part of the jig widened, pour the concrete in, and when the jig is pulled out after the concrete has solidified, the integrated inner cylinder The lower end of the outer cylinder that has been pulled out and expanded from the outer cylinder returns to the original cylinder. For this reason, it can be easily extracted from the solidified concrete ground,
There is an effect that a buried hole in which the upper portion of the opening for burying the vertical piece is not large in diameter is easily formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the construction of an embodiment of a vertical buried hole forming jig of the present invention, FIG. 2 is a perspective view showing the members shown in FIG. 1 integrated, and FIG. 1 is a top view of the outer cylinder shown in FIG. 1, FIG. 4 is a side sectional view of the outer cylinder shown in FIG. 1, FIG. 5 is a bottom view of the outer cylinder shown in FIG. The figure is a top view when the jig of the present invention is used, and FIG. 7 is a cross-sectional view of FIG.

Claims (1)

(57) [Scope of request for utility model registration] 1. A vertical burial hole forming jig for forming a burial hole for loosely inserting a buried portion of a vertical bar when concrete is buried in concrete when the vertical bar is buried in concrete. An outer cylindrical body (1) having an inner hole extending in a direction, and an inner cylindrical body (2) fitted and integrated from an upper end of the inner hole of the outer cylindrical body (1); At the lower end of (1), at least one thick portion (13) sandwiched by a set of slits (12) divided from the lower end toward the upper end and having a greater thickness toward the lower end is provided. A part of the material of the outer cylinder (1) is formed so that when the inner cylinder (2) is fitted and inserted, the thick portion (13) can be spread outwardly, and the concrete pressure is increased. A vertical burial hole forming jig, which is made of a material that can withstand the heat.