JPH069249Y2 - Mold material for anchor bolt holes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a material for forming an anchor bolt hole provided for implanting an anchor bolt on a foundation.

<Prior Art> Conventionally, as shown in the side sectional view of FIG. 3, anchor bolt holes 2 are provided in the foundation 1 in advance when installing a building, a machine or the like. The anchor bolt 3 is inserted into the anchor bolt hole 2 and the back-filled mortar 4 is filled, and the anchor bolt 3 is inserted.
Is fixed to the foundation 1. A hook H is provided at the tip of the anchor bolt 3 so that the anchor bolt 3 is firmly fixed to the backfilled mortar 4.

As a usual means for forming the anchor bolt hole 2, for example, a cylindrical mold material or pipe material is previously arranged as one of the means.
After pouring the basic concrete, it was removed to form a hole, and as another means, a protrusion or a butterfly was formed on the outer peripheral surface of the above-mentioned mold material to increase the resistance against pulling out.

<Problems to be Solved by the Invention> However, in the anchor bolt hole 2 formed by the first means, the basic concrete and the post-filling mortar 4 are used.
Since the anchor bolts 3 are fixed only by the adhesive force of, the proof strength against the pulling force F cannot be said to be sufficient. That is, since the post-filling mortar 4 shrinks after curing, the adhesive force is generally lower than the calculated value. Therefore, even if the pulling force F is within the calculated value, there is a problem that the anchor bolt 3 is pulled out from the foundation 1 together with the back-filled mortar 4.

On the other hand, the anchor bolt hole 2 formed by the second means using the mold material having the protrusions and the butterfly formed on the outer peripheral surface can resist the pulling force, but since it is a simple protrusion or butterfly shape, it is between the backfilled mortar 4 and the basic concrete. "Backlash" that occurs in
Cannot be prevented. Therefore, it was not possible to obtain a stable fixed state of the anchor bolt in the basic concrete for a long period of time.

<Means for Solving the Problems> Therefore, the present invention is one in which a ridge is spirally and integrally provided on the outer peripheral surface of a cylindrical base body.
An upward surface and a downward surface protruding substantially the same length in a state substantially orthogonal to the outer peripheral surface of the base body are formed in parallel at a predetermined interval, and between the outer peripheral edge portions of the both surfaces, the outer peripheral surface of the base body is in a substantially parallel state. There is provided a mold material having an outer surface formed on.

<Operation> When the above-mentioned mold material is arranged at a predetermined position in the basic formwork and the basic concrete is placed, a lower surface wall corresponding to the upward surface is formed on the peripheral wall of the anchor bolt hole. Similarly, if the upper surface wall and the side surface wall are formed corresponding to the downward surface and the outer surface, respectively, and if the space formed by each of these surface walls, the so-called filling chamber, is filled with the backfilled mortar, the backfilled mortar is in a state free from backlash. Fixed to. Moreover, since the ridges are formed by the parallel upward and downward surfaces and the outer surface orthogonal to these surfaces, the rotation is smooth when the mold material is removed, and the holes can be easily formed in the concrete foundation.

<Examples> The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a mold material according to the present invention, and FIG. 2 is a side sectional view of an anchor bolt hole formed using the mold material.

First, the structure of the mold material will be described. The mold material A is a columnar base 5 made of steel, ceramics or the like. The ridge 6 is spirally and integrally provided on the outer peripheral surface 5a of the base 5. The protrusion 6 is provided in a so-called square screw shape, and a downward surface W ₂ is formed at a predetermined interval and in parallel with the upward surface W ₁ that is substantially orthogonal to the outer peripheral surface 5 a of the base body 5. Moreover, these surfaces W ₁ , W ₂
Have almost the same length and length. Further, an outer surface W ₃ is formed between the outer peripheral line portions W _a and W _{b of the} both surfaces W ₁ and W _{2 in} a state substantially parallel to the outer peripheral surface 5 a of the base body 5.

Next, the procedure for forming the anchor bolt holes in the foundation by using the mold material A will be described. For example, when it is necessary to embed the anchor bolt 3 in three steps of the mold material A in order to counter the pulling force F, first, a release agent is applied to the outer surface of the mold material A. Then, the form A is arranged in the form (not shown) of the base 1 so that the required number of stages is 3 below the top end of the base 1. At the same time, the axis of the mold material A is aligned with the arrangement position of the anchor bolt 3. In such a state, foundation concrete is poured into the formwork to form the foundation 1. After the base 1 is cured, the mold material A is removed from the base 1. At this time, when the base body 5 protruding from the top end of the foundation 1 is rotated in the circumferential direction, since the downward surface W ₁ and the upward surface W ₂ protrude by the same length, the outer side surface W ₃ is further centered on the base body 5. Since it rotates in parallel with, if the initial turning force is sufficient, it will rotate smoothly as it is. Moreover, by interposing a release agent, the adhesion between the mold material A and the basic concrete can be more easily separated, and the screw can be screwed back from the nut as a whole.
Is removed. Further, if the mold material A is formed of a material capable of withstanding the initial rotational force, the mold material A itself will not be broken, and diversion will be easy. Inside the base 1 from which the mold material A has been removed, female screw-shaped anchor bolt holes 7 corresponding to the base body 5 and the ridges 6 of the mold material A are formed.

On the peripheral wall of the anchor bolt hole 7 formed as described above,
A bottom wall W _x corresponding to the upward surface W ₁ of the mold material A, an upper surface wall W _y corresponding to the downward surface W ₂ and a side wall W _z corresponding to the outer surface W _c form a filling chamber W _o having a substantially rectangular cross section. It is formed. When the anchor bolt 3 is inserted into the anchor bolt hole 7 to set the position and then the back-filled mortar material is filled, the back-filled mortar material flows into the filling chamber W _o . As described above, since the filling chamber W _o has a rectangular cross section, when the back-filled mortar is sufficiently filled, there is no gap between the foundation 1 and the lower surface wall W _x , the upper surface wall W _y , and the side surface wall W _z .

In other words, with respect to the base 1, the cured post-filling mortar 4 does not rattle up and down, left and right. Therefore, the post-filling mortar 4 after hardening is firmly fixed to the base 1.

As a result, the anchor bolt 3 itself provided with the hook H is fixed to the foundation 1 without looseness or looseness.

It should be noted that a handle 8 may be provided on the top of the base 5 for rotating and carrying the mold material A.

<Effect of the Invention> When the mold material according to the present invention is used as described above, the filling chamber is formed in the anchor bolt hole by the upper and lower surface walls that are substantially orthogonal to the axis of the hole and the side walls that are substantially parallel to each other. When the filling chamber is filled with post-filling mortar, there is no backlash of the post-filling mortar that hardens to the foundation.Therefore, there is no looseness or looseness in fixing the anchor bolts integrated with the post-filling mortar and the foundation, and there is no accident such as removal. Does not happen.

Moreover, since the base body itself has a cylindrical shape, and the upper and lower surfaces constituting the ridge are substantially orthogonal to the outer peripheral surface of the base body, and the outer side surfaces thereof are also parallel, rotation (extraction) of the mold material is extremely easy.

As a result, the die material can be diverted without being disassembled, which is economically advantageous.

[Brief description of drawings]

FIG. 1 is a perspective view of a mold member according to the present invention, FIG. 2 is a side sectional view of an anchor bolt hole formed using the mold member, and FIG. 3 is a side sectional view showing a conventional anchor bolt fixing state. is there. 1 ... Basic, 3 ... anchor bolt, 5 ... substrate, 6 ... ridges, 7 ... anchor bolt holes, A ... mold material, W 1 _... upward surface, W 2 _... lower surface, W 3 _... outer surface, W o _... filling Room.

Claims (1)

[Scope of utility model registration request] 1. A mold material for forming a hole for an anchor bolt in a foundation, wherein a ridge is spirally and integrally provided on an outer peripheral surface of a cylindrical base body, The ridge is formed such that an upward surface and a downward surface protruding substantially the same length in a state substantially orthogonal to the outer peripheral surface of the base body are formed in parallel at a predetermined interval, and the outer peripheral surface of the base body is provided between the outer peripheral edge portions of the both surfaces. A mold material for an anchor bolt hole, which has an outer surface formed in a state substantially parallel to.