JPH07259336A - Jig for forming column-burying hole in concrete structure - Google Patents

Abstract

PURPOSE:To improve workability by covering the surface of a shape retaining jig, to which an element hole, into which a column, etc., are disposed in upright, is formed, with a disposable sheet with a plurality of projections, in which air is sealed, and removing the sheet after the solidification of concrete. CONSTITUTION:The surface of a shape retaining material 2, to which element holes are formed at the time of the placing of concrete, is covered with a shape retaining sheet (such as a cushion sheet), with a large number of projectins 6, in which air is sealed, thus constituting an element-hole forming jig 1. The jig l is fixed onto forms by a locating plate 3, concrete is placed, and the jig 1 is removed after the solidificaion of concrete. A column 13, etc., are disposed in upright into a burying hole 11, the burying hole 11 is filled with mortar 14, and a concrete structure 10 and the column 13 are fastened. Accordingly, the jig l is removed easily, and workability is improved while the sheet 5 is brought to a disposable state, and cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for forming a buried hole for burying a pillar in a concrete structure when the pillar is erected in a concrete structure such as a hand training.

[0002]

2. Description of the Related Art Generally, in order to erect a pillar such as a training or a roof, a buried hole having a predetermined size is formed in a concrete structure, and the base of the pillar is inserted into the buried hole to be buried. The pillar is firmly fixed in the buried hole by pouring a fixing material such as mortar into the hole to solidify it.

To form the buried hole, a dedicated forming jig that can be repeatedly used is used. As such a thing, for example, those disclosed in Japanese Patent Application No. 4-51106 and Japanese Utility Model Publication No. 5-4499 are conventionally known.

The forming jig disclosed in the above publication has a cylindrical shape-retaining member formed on a tapered surface slightly tapering toward a closed tip, and a shape-retaining member provided at the base end of the shape-retaining member. A positioning plate for fixing the member at a predetermined position, a bag-shaped molding member that removably covers the outer periphery of the shape-retaining member, and a ridge portion of a predetermined length or a band that is provided on the molding member and extends in the circumferential direction. Was equipped with.

Then, when a buried hole for erection of a pillar is provided in a concrete structure, a shape-retaining member is covered with a molding member, and the shape-retaining member is installed at a predetermined position and fixed by a mounting plate. Place concrete around the shape-retaining member.
Furthermore, when the concrete solidifies, the shape retention member is removed,
After that, by taking out the forming member, an embedded hole is formed in the concrete structure, and a concave portion along the circumferential direction is formed on the peripheral surface in the embedded hole in accordance with the protrusion of the forming member. After that, by inserting the base of the pillar into the buried hole and placing mortar etc. around the base of the pillar to solidify it, the pillar is fixed in the buried hole of the concrete structure, and the peripheral surface in the buried hole Due to the concave portion provided along the circumferential direction,
Mortar etc. placed around the pillar is securely locked,
The pillar body is firmly erected so that the shape retaining member and the molding member can be repeatedly used.

[0006]

However, in the above-mentioned conventional forming jig, the shape-retaining member and the molding member coated on the outer periphery of the shape-retaining member can be repeatedly used when forming the pillar-embedding hole. However, in particular, in the case of a molded member, since the molded member is formed by molding a rubber or a rigid member into a predetermined shape, the cost per piece is high,
Due to the change of material and the deformation of shape, there is a limit even if it is used repeatedly, and there is a problem that the cost increases as a whole.

Further, since the ridges provided on the molding member are provided along the circumferential direction orthogonal to the inserting direction of the shape-retaining member for a predetermined length or over the circumferential direction, the solidified concrete structure. When the molded member is taken out from the ridge, since the length of the ridge portion is a predetermined length, the degree of engagement between the ridge portion and the concave portion formed corresponding thereto becomes too large, and However, there is an inconvenience that it takes time to take out the molded member.

Therefore, according to the present invention, by forming a molded member from a disposable sheet member, the cost of the molded member can be reduced and the pillar member of a concrete structure can be easily removed from the buried hole. It is intended to provide a hole forming jig.

[0009]

A jig for forming a concrete pillar embedded hole according to the present invention is a shape-retaining member having an outer shape corresponding to an embedding hole having a predetermined size and having a closed front end. A forming jig, comprising: a positioning plate attached to a base end portion; and a molding member that covers the outer periphery of the shape-retaining member and is detachably mounted on the shape-retaining member. Is formed by a sheet member provided with a small protrusion.

Further, preferably, the plurality of projections are formed in a fine hemispherical shape, the molding member is formed of a sheet member in which air is sealed in the projections, and the molding member is sealed in air in the projections. And a sheet member made of the foamed brazing material.

[0011]

In order to form the pillar burying hole in the concrete structure with such a forming jig, the shape-retaining member of the forming jig is covered with the forming member, and it is placed at a predetermined position in the mold for forming the concrete structure. The forming jig is installed, and the mounting plate of the forming jig is fixed to the fixing portion of the mold with bolts or the like to position the forming jig at a predetermined depth. Then, concrete is poured into the formwork to solidify the concrete, and after the concrete has solidified, the formwork and positioning plate are removed, and the shape-retaining member is taken out from the solidified concrete structure, and the embedded hole in the concrete structure is removed. Remove the molded part from.

Thereafter, the base of the pillar is inserted into the buried hole, and mortar or the like is cast between the base of the pillar and the buried hole to solidify, and the pillar is fixed to the buried hole of the concrete structure. A large number of recesses provided on the inner peripheral surface of the burial hole securely locks mortar or the like that is cast around the column, and the column is firmly erected on the concrete structure.

Therefore, since the molding member is formed by using the sheet member having the projection, the molding of the projection of the molding member becomes unnecessary, and the sheet member is extremely inexpensive, so that the molding member is made disposable. However, it is possible to reduce the cost of the forming jig.

Further, when the projection provided on the molding member is formed in a small projection shape, when the molding member is taken out from the buried hole, the recess of the buried hole and the projection of the molding member are appropriately engaged with each other. Since it weakens, it becomes easy to take out the molded member from the embedded hole, and the workability is improved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings.

In FIG. 1, a jig 1 for forming a pillar-embedded hole of the present embodiment has a cylindrical shape-retaining member 2 having a closed end.
A positioning plate 3 integrally attached to the base end of the shape-retaining member 2, a bag-shaped molding member 5 that detachably covers the outer periphery of the shape-retaining member 2, and a large number of protrusions formed on the molding member 5. And the projecting portion 6 thereof.

As shown in FIG. 2, the shape-retaining member 2 is formed in the shape of a rectangular tube with its tip (lower end) closed by bending a rigid metal plate, and its cross-section is substantially square. It is formed in a shape. Further, the shape-retaining member 2 has a peripheral surface formed into a tapered surface so that the shape-retaining member 2 is tapered toward the front end. The positioning plate 3 is integrally formed at the base end of the shape-retaining member 2 by welding or the like. Installed on.

A bolt insertion hole 4 is provided at a required position of the positioning plate 3, and the insertion hole 4 of the positioning plate 3 is provided.
Is fixed to a predetermined fixing portion 8 to be described later with a bolt 9, whereby the shape-retaining member 2 is positioned.

As shown in FIG. 2, the molding member 5 can be inserted from the front end of the shape-retaining member 2 to cover the front end and the peripheral surface thereof. The shape-retaining member 2 is detachably attached to the shape-retaining member 2. Also,
A large number of hemispherical protrusions 6 are provided on the molded member 5.

In this embodiment, the molding member 5 is formed by a so-called cushion sheet having a large number of protrusions 6 in which air is sealed. That is, the molding member 5
Is a transparent and extremely thin sheet made of foam material.
Multiple sheets are stacked, one sheet has a large number of hemispherical small projections 6 having a space inside, and air is introduced into the projections 6,
The sheet member is formed by sealing the protrusion 6 with the other sheet, and the sheet member is formed in a shape corresponding to the shape retaining member 2. Therefore, by forming the molded member using the sheet member having the protrusion, the molded member used does not require molding of the protrusion and the like, and the sheet member is extremely inexpensive, so the molded member is disposable. However, it is possible to reduce the cost.

Next, a description will be given of how to form the pillar-burying holes in the concrete structure 10 by the forming jig 1 of this embodiment.

As shown in FIG. 2, when the buried hole 11 for standing the pillar is provided in the concrete structure 10, as shown in FIG.
The shape-retaining member 2 of the forming jig 1 is covered with the forming member 5, and as shown in FIG. 3, the forming jig 1 is installed at a predetermined position in the form frame 7 forming the concrete structure. The positioning jig 3 is positioned at a predetermined depth by fixing the positioning plate 3 to the fixing portion 8 provided on the form frame 7 and fixing the positioning plate 3 to the fixing portion 8 with the bolt 9 through the insertion hole 4. To be done.

Then, concrete is poured into the mold 7, and when the concrete is solidified, a buried hole 11 is formed around the molding member 5. As shown in FIG. 4, the mold 7 is removed and the bolt 9 is attached. The shape retention member 2 is removed together with the positioning plate 3
Is removed from the solidified concrete structure 10. next,
As shown in FIG. 5, by removing the molding member 5 from the embedded hole 11 in the concrete structure 10, the embedded hole 11 is formed in the concrete structure 10. A large number of hemispherical concave portions 12 corresponding to the large number of protrusions 6 of the molding member 5 are formed on the inner peripheral surface of the buried hole 11 from which the molding member 5 is taken out.

After that, as shown in FIG. 6, by inserting the base of the pillar 13 into the buried hole 11 and setting the mortar 14 between the base of the pillar 13 and the buried hole 11 to solidify it. The pillar 13 is fixed to the buried hole 11 of the concrete structure 10, and the mortar 14 is cast around the pillar 13 by the large number of recesses 12 provided on the inner peripheral surface of the buried hole 11.
Is securely locked, and the pillar 13 is fixed to the concrete structure 10.
Firmly set up.

Therefore, by forming the molding member using a sheet member having a large number of protrusions, it is not necessary to mold the protrusions of the molding member and the sheet member is extremely inexpensive, so the molding member is disposable. However, it is possible to reduce the cost of the forming jig.

Further, since the projection provided on the molding member is formed into a small projection shape, when the molding member is taken out from the buried hole, the recess of the buried hole and the projection of the molding member are appropriately engaged with each other. Since it is weakened, it becomes easy to take out the molded member from the buried hole, and the workability is improved.

In this embodiment, the case where a commercially available cushion sheet is used as the material of the molding member has been described, but the material is not limited to this, and may be made of flexible plastic or other members. You may Further, each protrusion is not limited to a hemispherical shape, but may be any shape such as an ellipse.

[0028]

As described above, according to the present invention,
By configuring the molding member using a sheet member having a large number of small protrusions, the molding of the protrusions of the molding member is unnecessary, and since the sheet member is extremely inexpensive, even if the molding member is disposable, It is possible to reduce the cost of the forming jig.

Further, when the projection provided on the molding member is formed in a small projection shape, when the molding member is taken out from the buried hole, the recess of the buried hole and the projection of the molding member are appropriately engaged. Since it weakens, it becomes easy to take out the molded member from the embedded hole, and the workability is improved.

[Brief description of drawings]

FIG. 1 is a front view showing a jig for forming a pillar embedded hole according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a forming jig.

FIG. 3 is a front view showing a forming jig in a cast concrete structure.

FIG. 4 is a front view showing a shape-retaining member of a forming jig taken out from a solidified concrete structure.

FIG. 5 is a front view showing a molded member taken out from an embedding hole of a solidified concrete structure.

FIG. 6 is a perspective view showing a columnar body that is erected in a buried hole of a concrete structure.

[Explanation of symbols]

 1 Forming Jig 2 Shape-Retaining Member 3 Positioning Plate 5 Molding Member 6 Projection 10 Concrete Structure 11 Buried Hole

Claims (4)

[Claims] 1. A shape-retaining member having an outer shape corresponding to an embedding hole having a predetermined size and a closed end, a positioning plate attached to the base end of the shape-retaining member, and an outer periphery of the shape-retaining member. A pillar-shaped hole for embedding a concrete structure, comprising a forming member detachably attached to the shape-retaining member, and the forming member is formed of a sheet member provided with a large number of small protrusions. Forming jig. 2. The jig for forming a pillar embedded hole in a concrete structure according to claim 1, wherein the plurality of protrusions are formed in a fine hemispherical shape. 3. The jig for forming a pillar embedded hole in a concrete structure according to claim 1, wherein the molding member is formed of a flexible sheet member in which air is sealed in the protrusion. 4. The jig for forming a pillar embedded hole in a concrete structure according to claim 1, 2 or 3, wherein the molding member is formed of a sheet member made of a foam material in which air is sealed in the protrusion.