JPH11311022A - Form locking tool and form building-up method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form locking tool facilitating building-up and demolition of a form and provide a form building-up method. SOLUTION: A thread part 5 of a form locking tool 1 is inserted through a through hole 11 formed in a form 2 from the outer surface 2b side of the form 2 toward the inner surface 2a side so that one end thereof is protruded. One end 5a of the thread part 5 is thread-fastened to an internal thread hole (internal thread) 8 formed at the end part 3a (3b) of a separator 3, and an inner surface 7a of a flange part 7 is made to abut the outer surface 2b side of the form 2 to hold the form 2 between the flange part 7 and the end part 3a (3b) of the separator 3. The end part 3a (3b) of the separator 3 is previously fitted with a cone having the internal thread hole (internal thread) 8 to which one end of the thread part 5 of the form locking tool 1 is thread-fastened, and a flange 9 abutting the inner surface 2a side of the form 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separator for holding a pair of concrete casting formwork used when constructing a foundation of a building or a concrete wall, etc., at predetermined intervals and in parallel with each other. And a method of assembling a formwork using the formwork locking tool.

[0002]

2. Description of the Related Art As is well known, when a concrete wall of a building is constructed, for example, (1) As shown in FIG. 6 and FIG. Frame 2
Is a round separator 23 having washers 21 protruding near both ends 3a and 3b thereof, steel pipes 24 as vertical and horizontal materials, and these steel pipes 24 are connected to the outer surface 2 of the formwork 2.
It is assembled using a foam tie 25 and rib washers 26 fixed on the b side.

In this case, the round separator 23 holds the pair of molds 2 in parallel with each other at a predetermined interval.
That is, the steel pipe 24 and the foam tie 25 are used to support the formwork 2 against the side pressure of the concrete wall or the like to be cast. Is done.

That is, as shown in FIG. 6, the round separator 23 is inserted into the insertion hole 11 formed in the mold 2 arranged at a predetermined position from the inner surface 2a of the mold 2 to the outer surface 2b. The end 3 a (3 b) is inserted so as to protrude, and the washer 21 is brought into contact with the inner surface 2 a of the mold 2.

[0005] The foam tie 25 has one end 25a.
Female screw 25c formed on the end portion 3a (3b) of the round separator 23 is screwed into the male screw 3c formed on the end portion 3a (3b) of the round separator 23. Fixed in this way.

On the other end 25b side of the form tie 25 where the male screw 25d is formed, a rib washer 26 and a nut 27 are provided.
By tightening the nut 27, the steel pipe 24 arranged vertically and horizontally on the outer surface 2b side of the formwork 2 is fixed by a rib washer 26 as shown in FIG.

(2) As shown in FIG. 8, when finishing the concrete wall or the like is considered, male screws 3c are formed at both ends 3a and 3b instead of the round separator 23 having the washer 21. And the female screw 34a into which the male screw 3c of the end 3a (3b) of the separator 3 is screwed, and the female screw 2 at one end 25a of the form tie 25 inserted through the insertion hole 11 of the formwork 2.
Cone 34 having a male thread portion 34b screwed into 5c
Is sometimes used.

Further, (3) As shown in FIG.
When the heat insulating material 41 is driven into the inner surface 2a side of
Instead of the cone 34 of (2), a cone 44 having a flange 42 for enlarging the pressure receiving area and preventing biting into the heat insulating material 41 (for example, manufactured by Marui Sangyo Co., Ltd., trade name: KP-con, etc.) Sometimes used.

The cone 44 has a flange 42 abutting on the inner surface 41a of the heat insulating material 41 and an insertion tube 43 inserted into a through hole 41c formed in the heat insulating material 41. And the form tie 25 are tightened by a shaft leg 45 having external threads 45c formed at both ends thereof.

[0010]

However, in the above-mentioned conventional examples (1) to (3), the steel tubing 24 is arranged vertically and horizontally on the outer surface 2b side of the formwork 2 to form the tie 25 or the like. Since it is necessary to fix with the rib washer 26 and the like, there is a problem that it takes time and effort to assemble, put concrete, and disassemble after curing. The steel pipe 24
Is heavy, so that there is a problem that the assembling work and the dismantling work cannot be performed efficiently.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a form-locking tool and a method of assembling a form that can easily assemble and disassemble the form. I do.

[0012]

In order to achieve the above-mentioned object, the means of the form-locking device of claim 1 is that a pair of concrete-forming forms are spaced apart from each other at a predetermined interval. A form-locking device for locking the form to an end of a separator held in parallel, wherein one end of the form protrudes from an outer surface side to an inner surface side of an insert hole formed in the form. A screw part that is inserted so as to be screwed into a female screw formed at the end of the separator, a screw head provided on the other end side of the screw part, and one end of the screw part and the screw head There is provided a flange protruding between the flanges and holding the mold frame between the inner surface and the end of the separator.

According to a second aspect of the present invention, a plurality of ribs are provided on the flange portion.

According to a third aspect of the present invention, the flange portion is not fixed between one end of the screw portion and the screw head.

A fourth aspect of the present invention resides in that at least the screw portion is made of plastic.

According to a fifth aspect of the present invention, there is provided a method for assembling a pair of concrete casting molds which are held parallel to each other at a predetermined interval by a separator. 5. Inserting the threaded portion of the form-locking member according to any one of Items 1 to 4 into an insertion hole formed in the form such that one end protrudes from the outer surface to the inner surface of the form. By screwing one end of the screw portion to a female screw formed at the end portion of the separator, and bringing the inner surface of the flange portion into contact with the outer surface side of the mold, the flange portion and the end portion of the separator To hold the formwork.

According to a sixth aspect of the present invention, there is provided a female screw in which one end of a screw portion of the form-locking member is screwed to an end of the separator, and an inner surface of the form. It is to attach a cone having a flange in advance.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. Note that the same components as those of the above-described conventional technology are denoted by the same reference numerals and description thereof is omitted.

As shown in FIGS. 1 to 3, a form-locking device 1 according to this embodiment is a concrete anchoring device 1 used for constructing a rising portion of a heat insulating foundation A of a building. A pair of molds 2 are engaged with, for example, a cone 4 screwed to an end 3a (3b) of a separator 3 that holds them in parallel at a predetermined interval, and includes a screw portion 5, It comprises a screw head 6 and a flange 7.

As shown in FIGS. 2 and 3, the separator 3 has, for example, external threads 3c formed at both ends 3a and 3b, respectively, and has two cones 4 at both ends 3a and 3b as necessary. Are screwed respectively.

The cone 4 has the separator 3 on one side.
A female screw hole (female screw) 8 which is screwed with the male screw 3c of the end 3a (3b) and screwed with the one end 5a of the screw portion 5 of the formwork locking tool 1 on the other side; 2a its outer surface 9
b has a flange 9 with which it abuts. The flange 9 is provided with a plurality of ribs 10 as needed. In this embodiment, the separator 3 and the cone 4 are configured as separate bodies, but the present invention is not limited to this, and the separator 3 and the cone 4 may be integrally configured. In the case where a heat insulating material or the like is not used, the end 3a (3b) of the separator 3 is formed into an appropriate shape having a female screw, and is brought into contact with the inner surface 2a of the mold 2 without attaching the cone 4 as it is. Is also good.

As shown in FIG. 3, the screw portion 5 is formed to be slightly longer than the thickness of the mold 2, and into the insertion hole 11 formed in the mold 2 from the outer surface 2b side of the mold 2 to the inner surface. 2a
One end 5 a of the cone 4 is inserted so as to protrude toward the side, and is screwed into the female screw hole 8 of the cone 4.

The screw head 6 is provided, for example, in a columnar shape on the other end 5b side of the screw portion 5, and has a top portion, for example, in a plan view so that it can be tightened by an electric tool such as an impact wrench. A hexagonal screw head 6a is formed.

The flange portion 7 is, for example, protruded in a disk shape between the other end 5b of the screw portion 5 and the screw head 6, and has an inner surface 7a and an outer surface 9 of the flange 9 of the cone 4, for example.
b and the outer surface 2 of this form 2
b.

The method of assembling the formwork 2 using the formwork locking tool 1 constructed as described above is as follows. The screw portion 5 is inserted into the insertion hole 11 formed in the formwork 2 on the outer surface 2 b side of the formwork 2. One end 5a of the screw portion 5 is inserted into the cone 4 so as to project toward the inner surface 2a.
And the inner surface 7a of the flange portion 7 is brought into contact with the outer surface 2b of the mold frame 2 so that the mold frame is sandwiched between the flange portion 7 and the flange 9 of the cone 4, for example. Things.

As shown in FIG. 4, the mold 2 is formed in a rectangular plate shape having a predetermined thickness from, for example, a foamed plastic heat insulating material (for example, Kanelite Foam, manufactured by Kaneka Chemical Industry Co., Ltd.). The fitting portions 12 are provided alternately at both ends in the longitudinal direction. The insulation foundation A
In such a case, the fitting portions 12 of the adjacent formwork 2 may be overlapped and arranged at a predetermined position so as to be arranged in the lateral direction.

A plurality of insertion holes 11 are formed in the mold 2, and the pitch thereof is appropriately designed according to the lateral pressure of the concrete to be cast, the strength of the mold 2, and the like.
Further, the material of the mold 2 is not limited to the foamed plastic heat insulating material as in this embodiment, and may be plywood, a steel plate, or the like. A heat insulating material may be driven into the inner surface side.

As shown in FIG. 2, after the form-locking member 1 is attached to the cone 4 or the like from the outer surface 2b side of one form 2 as described above, the other form 2 is erected. By attaching the form-locking device 1 from the outer surface 2b side of the opposing formwork 2 by attaching the form-locking device 1 from the outer surface 2b side, the conventional steel pipe, form tie, etc. Since the formwork 2 can be locked without using it, there is an advantage that even a non-skilled worker can easily assemble the formwork 2. Also, when the formwork 2 is dismantled, the formwork locking tool 1 can be removed only by loosening the screw portion 5, so that there is an advantage that no labor is required. Moreover, the form-locking device 1
An electric tool such as an impact wrench can be used for attaching and detaching the mold, and the mold 2 is not required to be dismantled or finished. For example, the mold is placed in a place that is not visible from the outside such as the inside of the heat insulating foundation A. When the frame locking device 1 is attached, it is not necessary to remove it.

If the cone 4 having the flange 9 is previously attached to the end 3a (3b) of the separator 3 as in this embodiment, a foamed plastic heat insulating material is used for the formwork 2 itself. Case or inner surface 2 of formwork 2
Even if a heat insulator is driven into the a side, the cone 4
However, there is an advantage that excessive deformation and breakage of the heat insulating material can be reliably prevented since the heat insulating material does not penetrate. Further, since the form-locking device 1 also has the flange portion 7, when a foamed plastic heat insulating material is used for the formwork 2 itself, the screw head 6 does not bite into the foamed plastic heat insulating material, so that the same advantage is obtained. is there.

The material of the form locking device 1 is as follows.
For example, various materials such as metals such as iron and stainless steel and plastics can be mentioned, but at least the screw portion 5, preferably the screw portion 5 and the flange portion 7, more preferably the screw portion 5, the flange portion 7, and the screw head. If all of No. 6 are composed of plastic having relatively low thermal conductivity, the heat insulating base A
Even when the formwork locking device 1 is left without being removed after construction, there is an advantage that the heat insulating effect of the heat insulating material is not reduced.

When the flange portion 7 is made of a material having a relatively low material strength, such as plastic, if a plurality of ribs 10 are provided as in this embodiment, the reinforcement can be achieved. . The size of the flange 7 is appropriately determined according to the compressive strength of the mold 2.
The thickness of the plate and the presence or absence of the ribs 10 are appropriately determined by the lateral pressure of the concrete to be cast, the material strength of the flange portion 7, and the like.

For example, as shown in FIG. 5, when the flange 7 is made of a steel plate, the rib 10 may not be provided. When the flange portion 7 made of the steel plate is formed as a separate body, the flange portion 7 may be fixed to the screw head 6 of the bolt 13 having the screw portion 5 by spot welding or the like. Here, the shape of the screw head 6a or the screw head 6 shown in FIG. 5 is desirably set to a hexagonal shape or an octagonal shape in plan view so that it can be rotated by an electric tool such as an impact wrench. A cross-shaped groove for an electric screwdriver or the like may be simply formed.

Further, the screw portion 5, the screw head 6, and the flange portion 7 may be integrally formed as in this embodiment, but if necessary, the screw portion 5 and the screw head may be formed. 6 are integrally formed and the flange 7 is not fixed to them and is configured separately, so that the structure becomes simpler.
There is an advantage that the manufacturing cost of the mold locking device 1 can be reduced.

In this embodiment, the case where the rising portion of the heat insulating foundation A is constructed has been described. However, the present invention is not limited to this. For example, a normal foundation of a building, a concrete wall, a concrete floor, concrete It can be used for assembling the formwork 2 used for construction of various structures such as columns.

[0035]

As described above, according to the invention of the formwork fixing device of claim 1 and the invention of the method of assembling the formwork of claim 5, the formwork fixing device comprises the screw portion and the screw head. Since it is provided with the flange portion, the formwork can be locked without using a conventional steel pipe, form tie, or the like. Therefore, there is an advantage that a non-skilled person can easily assemble the formwork. Also, when dismantling the formwork, the formwork locking device can be removed only by loosening the screw portion. In addition, an electric tool such as an impact wrench can be used to attach and remove the form-locking member, and when the form-locking member is attached to a place where dismantling or finishing work of the form is not necessary, The removal may not be necessary. In addition, since the form-locking member has a flange portion, there is an advantage that when a foamed plastic heat insulating material or the like is used for the form itself, the screw head does not bite into the foamed plastic heat insulating material.

According to the second aspect of the present invention, since a plurality of ribs are provided on the flange portion, even if the flange portion is made of a material having relatively low material strength such as plastic, the reinforcement is provided. There is an advantage that it can be achieved.

According to the third aspect of the present invention, since the flange portion is formed as a separate body and is not fixed between one end of the screw portion and the screw head, the structure of the form-locking member is simpler. become. Therefore, there is an advantage that the manufacturing cost of the form-locking member can be reduced.

According to the fourth aspect of the present invention, at least the screw portion is made of plastic having a relatively low thermal conductivity, so that the form-locking member is left without being removed after construction of the heat insulating foundation or the like. Even in this case, there is an advantage that the heat insulating effect of the heat insulating material is not reduced.

According to the invention of claim 6, a female screw into which one end of the threaded portion of the form-locking member is screwed to the end of the separator, and a flange abutting on the inner surface side of the form. Since the cone having the following is attached in advance, the cone does not bite into the heat insulating material even when the foamed plastic heat insulating material is used for the mold itself or when the heat insulating material is driven into the inner surface of the mold. Therefore, there is an advantage that excessive deformation and breakage of the heat insulating material can be reliably prevented.

[Brief description of the drawings]

FIG. 1A is a plan view of a form locking device according to an embodiment,
(b) is a side view.

FIG. 2 is a longitudinal sectional view showing a state in which a mold for a rising portion of a heat insulating foundation is assembled using the mold locking device of FIG. 1;

FIG. 3 is an enlarged longitudinal sectional view of a main part showing a locked state of the formwork of FIG. 2;

4A is a cross-sectional view and FIG. 4B is a front view of the mold shown in FIG.

5A is a plan view and FIG. 5B is a side view of another example of the form locking device.

FIG. 6 is a longitudinal sectional view showing a state in which a separator and a foam tie are fixed to a mold in a conventional example (1).

FIG. 7 is a perspective view showing a part of a conventional example (1) in cross section.

FIG. 8 is an enlarged longitudinal sectional view of a main part of a conventional example (2).

FIG. 9 is an enlarged longitudinal sectional view of a main part of a conventional example (3).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Formwork locking device 2 Formwork 2a Inner surface 2b Outer surface 3 Separator 3a (3b) End 4 Cone 5 Screw 5a One end 5b Other end 6 Screw head 7 Flange 7a Inner surface 8 Female screw hole (female screw) 9 Flange 10 Rib 11 insertion hole

Claims (6)

[Claims] 1. A form-locking device for locking a form to an end of a separator for holding a pair of forms for concrete casting at a predetermined interval in parallel with each other, wherein the form A threaded portion which is inserted into the insertion hole formed in the mold so that one end thereof protrudes from the outer surface side to the inner surface side, and is screwed to a female screw formed at an end of the separator; and A screw head provided on the other end side, and a flange portion protruding between one end of the screw portion and the screw head and holding the mold by its inner surface and the end of the separator. Formwork locking tool characterized by the above-mentioned. 2. The form-locking device according to claim 1, wherein a plurality of ribs are provided on the flange portion. 3. The form-locking tool according to claim 1, wherein the flange portion is not fixed between one end of the screw portion and the screw head. 4. The form-locking tool according to claim 1, wherein at least the screw portion is made of plastic. 5. A method for assembling a pair of formwork for concrete placing, which are held in parallel by a separator at a predetermined interval from each other, as set forth in claim 1, wherein: Part is inserted into an insertion hole formed in the mold so that one end thereof protrudes from the outer surface side to the inner surface side of the mold, and a female screw formed with one end of the screw portion at the end of the separator Wherein the inner surface of the flange portion is brought into contact with the outer surface of the mold so that the flange is sandwiched between the flange portion and the end of the separator. 6. A cone having a female screw into which one end of a screw portion of the formwork is screwed and a flange abutting on an inner surface side of the formwork is attached to an end of the separator in advance. 6. The method of assembling a formwork according to claim 5, wherein: