JP2859104B2 - Embedded cone of formwork separator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an embedded cone of a form separator used in a concrete exposed finish form.

[0002]

2. Description of the Related Art As is well known, a round separator and a thick end are fixed for setting a formwork for bare concrete finishing.
Connect the clamp bolt with a cone. The cone has a frusto-conical outer shape and has a rod connection hole that penetrates the center, and the inner peripheral surface of the hole has a male thread at the tip of the round separator and a male thread at the tip of the bolt for fixing the thick end. A female screw into which is screwed is formed.

[0003] There are a method of removing the cone exposed on the surface of the cast concrete when removing the formwork, and a method of leaving the cone on the surface layer of the cast concrete even after removing the formwork. A cone having a configuration premised on being used in the latter method is an embedded cone, for example, Japanese Utility Model Laid-Open No. 62-118844 and Japanese Patent Laid-Open No. 2-54066.
Japanese Patent Application Laid-Open Publication No. HEI 10-125131 discloses a conventional representative embedded cone.

[0004] The detachable cone is arranged such that its large-diameter end face abuts against the inner surface of the formwork to facilitate removal of the cone from the concrete. On the other hand, the embedded cone is arranged such that the small-diameter side end surface is in contact with the inner surface of the formwork so that the cone does not fall out of the concrete.

[0005]

The conventional buried cone has a truncated conical shape like a removable cone, and has a circular cross-sectional shape. Therefore, when removing the formwork,
Rotate the fixing clamp bolt to remove it from the internal thread of the cone and remove it.
The cone may rotate with the g. When the embedded cone rotates in this way, there is a problem that the cone moves in the axial direction due to the screw connection with the separator, and as a result, the cone easily comes out of the concrete. As described above, setting the cone so that the small-diameter end surface of the embedded cone abuts on the inner surface of the formwork is effective in making the cone hard to come out of the concrete. However, even in such a case, there is a possibility that a gap with concrete or a crack may be caused by an axial moving force caused by the co-rotation. In order to prevent this co-rotation, it is known that the cross section is rectangular as in the above-mentioned Japanese Utility Model Application Laid-Open No. 62-118844, but since the protruding corner is a right angle, cracks are formed in the surrounding concrete. There was a risk of causing it. Further, when the small-diameter end face of the above-mentioned cone abuts on the inner surface of the formwork, the space between the outer periphery of the small-diameter end of the cone and the formwork becomes a bottleneck at the time of concrete casting, and the concrete in that part becomes narrow. The filling property becomes worse,
A gap is likely to be formed around the small-diameter end of the cone due to poor filling.

When the mold is removed, the end surface of the buried cone is exposed on the exposed surface of the concrete. However, conventionally, the material and color of the cone are selected so that the exposed surface of the cone is as unobtrusive as possible. There was no aggressive intention to add decorative patterns to the exposed concrete surface on the exposed surface.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object the purpose of removing a form when removing a formwork.
It is an object of the present invention to provide an embedded cone in which when the clamping bolt is rotated and removed from the cone, the cone does not rotate and the surrounding concrete does not crack. Yet another object is to utilize an embedded cone as a means of adding decoration to a bare concrete finish.

[0008]

SUMMARY OF THE INVENTION Therefore, the embedded cone according to the first aspect of the present invention is applied to a concrete exposed finishing form.
Embedded cone of the formwork separator used,
A female screw is formed on the inner periphery of the rod coupling hole that penetrates the central portion, and a cross-sectional shape orthogonal to the central axis of the coupling hole is formed into a non-circular irregular shape having a convex portion at an obtuse angle , The irregular shape extends over the entire length along the central axis direction.
Configuration . Further, in the second invention, in addition to the above configuration, at least the outer end face portion of the cone exposed on the surface of the cast concrete is colored positively different from the color of the finished concrete finished surface. Further, in the third invention, the outer diameter of the cross section is made constant along the central axis direction.

[0009]

[Action] the buried cone according to the first invention among them
Since the cross section is formed in a non-circular shape having an obtuse-angled convex portion along the entire length along the central axis, the cone and the cast concrete are firmly connected in a state of meshing with each other, so that the ends are fixed. never cone on rotation of the clamp bolt is <br/> Ri co times. Since the convex portion of the cross section of the cone is obtuse, there is no danger of cracking the surrounding concrete.
Further, since the edge shapes of the cone that is exposed to the concrete Uchihanashi finished surface is also non-circular irregular shape with an obtuse angle of the convex portion, without the bonding mortar coating and tiles after mold removal co
Various patterns such as , for example, petal patterns can be drawn on the end face of the cone.
Also, like the embedded cone according to the second invention,
If the cone end face is colored in an appropriate color, the decorative effect is further improved. Further, the embedding according to the third aspect of the present invention.
As the cone, the outer diameter of the cross section, if constant along the central axis direction, a possibility does not damage the filling of the concrete.

[0010]

FIG. 1 shows the configuration of an embedding cone according to an embodiment of the present invention. The cone 1 has a configuration in which a metal joint nut 1b is embedded in a rod coupling hole that passes through the center of a ceramic main body 1a. Body 1
The cross-sectional shape orthogonal to the central axis of the joint nut 1b is a non-circular variant having a four-petal petal-shaped obtuse convex portion.
It is formed into a shape, and its outer diameter with respect to the longitudinal direction of the joint nut 1b are equal, yet its variants
The shape is formed over the entire length and has a straight rod-like outer shape. The main body 1a is manufactured by applying an appropriate glaze to at least one end surface of the main body 1a, and one end surface is appropriately colored and finished like a tile.

The method of using the embedded cone 1 of this embodiment is basically not different from the conventional one. That is, as shown in FIG. 2, the male screw portion of the tip end of the round separator 4 for determining the interval between the molds 3 is screwed into the joint nut 1b of the cone 1 almost to the middle, and one end surface of the cone 1 is used as a positioning surface. Is set. Then, the thick fixing clamp bolt 2 is inserted through the hole of the mold 3, and the male screw portion at the tip is screwed into the joint nut 1 b of the cone 1 from the opposite side. After that, the crosspiece 6 and the end brace 7 are set on the outside of the formwork 3, and these are fastened and fixed by the clamp 8 attached to the tip of the end brace fixing clamp bolt 2. Then, concrete 9 is cast inside the formwork 3.

After the concrete 9 has hardened, the form 3 is removed. Since the cone 1 of the present invention is an embedded cone,
The cone 1 is left in the concrete 9 even after removing the formwork.
When removing the formwork, the bolt 2 for fixing the thick end is removed from the joint nut 1b of the cone 1. At this time, the thick fixing clamp bolt 2 is rotated in the direction opposite to the screwing direction. However, since the outer shape of the cone body 1a is not a circular shape but a four-petal petal-shaped irregular shape, the cone 1 and the concrete 9 mesh with each other. So that the cone 1 does not rotate together with the foam tie 2.

When the mold 3 is removed, one end of the cone 1
After the removal of the formwork , the exposed surface of the concrete crete 9 which is not mortared or tiled is exposed. The exposed surface is colored as described above, and the petal pattern and the color of the petals add decoration to the exposed concrete surface. FIG. 3 shows some other examples of the cross-sectional shape (end face shape) of the cone 1. By using the embedded cone 1 having such end faces of various shapes and colors, it is possible to add a variety of decorative patterns to the bare concrete finish surface.

In this embodiment, the dimensions of the cross section of the cone are made constant, but the cross section on the inner surface side of the mold may be made smaller instead of making it constant.

[0015]

As described in detail above, in the embedding cone according to the first aspect of the present invention , the cross-sectional shape of the embedding cone is formed by forming an obtuse convex portion along its central axis over the entire length. since the non-circular having, tightly bound in a state such as the corresponding cone and pouring concrete meshes, thus cone on rotation of the form tie at mold removal is not able to Ri co times. Since the convex portion of the cross section of the cone is obtuse, there is no danger of cracking the surrounding concrete. In addition, the end face shape of the cone exposed on the exposed concrete finish surface
Since even a non-circular irregular shape with an obtuse angle of the convex portion, the mold removal
Concrete not to be mortared or tiled after leaving
On the exposed surface, various patterns such as petals can be drawn on the end face of the cone. Also, the second
If the end face of the cone is colored in an appropriate color as in the embedded cone according to the invention of the present invention , the decorative effect is further improved. Further, as in the embedded cone according to the third invention,
The outer diameter of the cross section should be constant along the center axis direction.
Therefore, there is no danger of impairing the filling property of the concrete.

[Brief description of the drawings]

FIG. 1 is a plan view (A), a longitudinal sectional view (B), and a perspective view (C) of an embedding cone according to an embodiment of the present invention.

FIG. 2 is a schematic view of a usage state of the embedding cone.

FIG. 3 is a diagram showing another example of the cross-sectional shape of the embedded cone according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 embedded cone 1a body 1b joint nut 2 form tie 3 formwork 4 round separator 8 clamp 9 concrete

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masato Sugano 7-20-8 Nishio Hisashi, Arakawa-ku, Tokyo Limited company inside Hokuto Metal Industry (56) References Jitsukai Sho 49-68232 (JP, U) 62-176314 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 17/06 101 E04C 5/20

Claims (3)

(57) [Claims] (1) Used as a formwork for bare concrete finishing
Embedded cone of a form separator to be formed, wherein a female screw is formed on the inner periphery of a rod coupling hole penetrating the center part, and a cross-sectional shape orthogonal to the central axis of the coupling hole is an obtuse convex part. is formed in a non-circular irregular shape having,
The embedding cone of the form separator, wherein the irregular shape extends over the entire length along the central axis direction . 2. The mold according to claim 1, wherein at least an outer end surface portion of the cone exposed on the surface of the cast concrete is colored positively different from the color of the exposed concrete finish surface. Embedded cone for frame separator. 3. The embedded cone of a form separator according to claim 1, wherein the outer diameter of the cross section is constant along the central axis direction.