JPH10152988A - Fixing tool of form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing tool of a form in which a structure is prevented from getting dirty with rusting in separators and from cracking around the part, avoiding water leakage resulting from these troubles and by which forms can be rapidly and easily fixed. SOLUTION: This fixing tool of a form is constituted of a separator 1, a pressing member 2 for setting materials composed of a wing 2a and a pipe 2c supporting batters T, Y, and a separator guide cylinder 2b extended forward, a fixing member 3 of the separator, in which a little larger insertion hole 3a than the separator 1 is formed around the axis, and a camber 4. An expansible and openable chuck 3c provided with a slope on the external wall and splits in the axial direction is arranged in the insertion hole 3a and a pressing-in hole 4a for the camber 4 is formed at the rear part of the insertion hole 3a. And further, a contractible ring 2d contracting the chuck 3c while pressing it when the fixing member 3 of the separator is inserted in the separator guide cylinder 2b, is provided in the pipe 2c to fix the separator 1 by the chuck 3c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork facility which is installed when concrete is poured using a civil engineering or building technique and is placed during a curing period after the casting. More particularly, the present invention relates to an improvement in a separator and a foam tie that play a role in maintaining the shape position of a formwork while opposing a lateral pressure generated during or after placing concrete.

[0002]

2. Description of the Related Art Conventional separators and foam ties of this type include so-called tie rod type fasteners, which are used for cold-worked round steel as separators for holding a formwork at a predetermined interval. A foam tie for fixing to the flutter material is attached via a wooden cone or the like, and the foam tie is fastened and fixed with a washer, a nut or the like. Since the separator and the foam tie are configured to fasten and fix the foam tie with a special washer, nut, or the like, not only can the strength against lateral pressure generated during or after concrete casting be increased, but also the fastening portion can be tightened. This has the advantage that it is unlikely to become loose.

[0003] However, in this type of separator and foam tie, the separator in the hardened concrete rusts and contaminates the concrete surface, or cracks are generated mainly in the separator portion, which deteriorates the quality. From the viewpoint of preventing such a situation, a wooden cone is interposed at 2.5 cm from the concrete surface, that is, at both ends of the separator to form a void, and after removing the form, the wooden cone is removed. In this case, it is necessary to fill the voids after the removal with mortar to perform a water stoppage treatment, and this post-processing work is troublesome, which is inconvenient in improving the workability of the entire formwork.

[0004] Further, in a structure or a water tank having a water level lower than the groundwater level, water is easily formed along the separator portion and water leakage easily occurs. Attach a ring, etc.
Although it is necessary to separately provide an auxiliary construction method to improve water tightness, there is still a problem that water leakage often occurs even if such an auxiliary construction method is applied, and it is inherently impossible to eliminate water leakage.

[0005] Furthermore, the separator and the foam are usually constructed by a worker extending his arm through a gap between temporary materials such as handrails for preventing falling attached to a framed scaffold or the like provided facing the formwork. It is necessary to work in an unreasonable posture in an extremely narrow space, such as placing and installing two or three meters of fluttering material vertically and horizontally, or rotating a rod-like fastening device such as a radiator to tighten the nut. There is a demand for a construction method capable of performing quick and simple operations while avoiding complicated work as much as possible.

SUMMARY OF THE INVENTION Therefore, the present invention
It was made in view of the above-mentioned problems,
The separator part does not rust and stains the surface of the structure, and cracks do not occur around the separator part, so that it can be installed quickly and easily at the site while avoiding water leakage caused by these. It is an object of the present invention to provide a separator and a foam tie that can be used.

[0006]

More specifically, as shown in FIG. 1, a formwork fixing device according to the present invention comprises a separator 1 for determining the position of a weir S, and a pair of horizontal flaps for holding the weir S. A wing 2a for supporting the Y or vertical fluttering material T from the rear side, and a flutter press comprising a separator guide cylinder 2b extending forward from a substantially central portion of the wing 2a and having a pipe 2c formed around an internal axis. A member 2, a separator fixing member 3 in which an insertion hole 3 a having an inner diameter slightly larger than the outer diameter of the separator 1 is formed around the inner axis from the front end, and the separator fixing member 3 is fixed to the flap holding member 2. And a camber 4 to be stopped, wherein a slope is formed on an outer wall portion of the front end portion of the insertion hole 3a so that an outer diameter increases toward the front,
Further, a chuck 3c having a plurality of cuts 3b in the axial direction and each of the divided pieces can be freely contracted and expanded is provided, and a camber press-fitting hole 4a for press-fitting the camber 4 is provided at a rear portion of the insertion hole 3a. The front end portion of the pipe 2c is provided with a contraction ring 2d that presses and contracts each divided piece of the chuck 3c when the separator fixing member 3 penetrates the separator guide cylinder 2b, The rear end portion of the separator 1 penetrating the camber press-fitting hole 4a and the wing 2 are inserted into the insertion hole 3a.
The chuck 3c is contracted by press-fitting the camber 4 with the rear end of the a, and the separator 1 is fixed.

In such technical means, the separator 1 only needs to be able to withstand the lateral pressure of the concrete generated when the fresh concrete is cast when the chuck 3c is shrunk and the separator 1 is fixed. Although the material, shape and the like are not limited, from the viewpoint of preventing a situation in which the weir S is positioned when the separator 1 is fixed, a wire is connected to the separator 1 in front of the weir S. After arranging the clip and fixing the dam S so as not to move, the chuck 3
It is preferable to perform the tightening of c.

Further, from the viewpoint of preventing the occurrence of rust on the separator 1 and reducing the loss of the separator 1 by adjusting the dimensions on site, the separator 1 is made of a synthetic resin. It is preferable that In this case, from the viewpoint of improving the adhesion to the concrete around the separator 1 and preventing the occurrence of water leakage after the concrete is hardened, the separator 1 made of this synthetic resin may have irregularities. preferable.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the accompanying drawings. FIG. 2 shows Embodiment 1 of a formwork of a concrete structure to which the formwork fixing device according to the present invention is applied, and FIG. 2 (a) is a plan view of the formwork fixing device. (B) is a sectional view of the formwork fixing device. For convenience of explanation, the right side in FIG. 2A and the near side in FIG. 2B will be described as rear.

In FIG. 1, a mold fixing device 11 mainly serves as a separator 1 which plays a role in determining the position of a weir plate 12.
3, a wing 16a that supports a pair of square pipes 15 that are horizontal fluttering members that support the barb 14 that is a vertical fluttering material that directly presses the weir board 12 at a predetermined interval, and a wing 16a that supports from the rear side, and a substantially central portion of the wing 16a. A flap holding member 16 comprising a separator guide cylinder 16b extending forward, a separator fixing member 17 for fixing the separator 13 to the separator guide cylinder 16b, and a separator fixing member 1
A camber 18 for fixing the 7 to the flutter pressing member 16
It is composed of

In such a technical means, the separator 13 according to this embodiment has a rod shape having a substantially circular cross section, and the unevenness is formed evenly over the entire peripheral surface portion thereof. Further, an embossed resin having irregularities on the peripheral surface is employed as the material.

The use of the embossed resin as the material of the separator 13 as described above not only provides the same strength as that of the conventional cold-worked round steel, but also provides the same strength.
This is because the problem caused by rust, which has been a problem with conventional round steel, can be solved. Also, due to the characteristics of resin, it can be easily cut with a cutter knife or the like, and the loss of material (separator) can be reduced. To enable
In addition, the reason why the peripheral surface is provided with irregularities is that adhesion to concrete around the separator 13 is improved, and water leakage after concrete hardening can be prevented.

In the present embodiment, the front end portion of such a separator 13 is fixed by a predetermined method (not shown), and a rear end portion thereof is formed with a hole in the weir plate 12 so as to be fixed from the rear side of the weir plate 12. , And the separator 1 is provided on the front surface of the weir plate 12.
3 is provided with a wire clip 19 for positioning. FIG. 3A is a front view showing details of the shape of the wire clip 19.
The operator can release the gripping force on the separator by pinching the both ends 19a of the operator with his / her fingers, so that it can be freely removed.

Further, the separator fixing member 17 is provided with a separator insertion hole 17a having an inner diameter slightly larger than the outer diameter of the separator 13 around the inner axis from the front end thereof. In the front end portion of FIG. 3, an outer wall portion is formed with a gradient so that the outer diameter increases toward the front, and FIG.
As shown in (b), a chuck 20 having a plurality of cuts 20a in the axial direction and configured so that each divided piece 20b can contract or expand freely is provided.

A camber press-in hole 18a for press-fitting the camber 18 is provided at a rear portion of the separator insertion hole 17a of the separator fixing member 17.

Further, the flutter pressing member 16 has a conduit 16c formed around the internal axis throughout the entire axial direction, and a separator fixing member 17 is provided at the front end of the conduit 16c. When penetrating the guide cylinder 16b, the contraction ring 16 serves to press and simultaneously contract each of the divided pieces 20b of the chuck 20.
d.

The contraction ring 1 according to this embodiment is
6d is provided with a gradient on the inner surface corresponding to the shape of the chuck 20, but by doing so, compared to the case of using a simple cylindrical shape having no gradient,
Since the chuck 20 can be pressed with a large area, the separator 13 fastened by the chuck 20 is more securely fixed.

In such a technical means, after inserting the rear end portion of the separator 13 which has been installed through the weir plate 12 in advance into the separator insertion hole 17a, the separator fixing member 17 into which the separator 13 is inserted is removed. From its rear end, it penetrates into the conduit 16c inside the separator guide cylinder 16b, and further, the rear end of the camber press-in hole 18a and the wing 1
If the camber 18 is press-fitted in the direction of arrow A in the figure between the rear end of the chuck 6a and the contraction ring 1
6d, the chuck 20 contracts, the rear end portion of the separator 13 is fastened, and the separator 13 is fixed.

Next, a fixing process of the formwork apparatus using the formwork fixing device according to the present embodiment will be described with reference to the work procedure explanatory view shown in FIG. This process is composed of (a) installation of a separator, (b) insertion of a separator fixing member, (c) penetration of a flutter pressing member, and (d) fixing by a camber.

(A) Installation of Separator First, the pier 14 which is a vertical fluttering material is nailed and fixed to the weir board 12, and is set up at a predetermined position along the lower end of a formwork panel 21. Separator 1
A hole for disposing a separator having a diameter slightly larger than the outer diameter of the separator 13 is formed in a portion where the separator 3 is to be disposed.

After fixing the front end portion (not shown) of the separator 13 at a predetermined position while passing the separator 13 through the hole, the separator 13 is cut with a cutter knife while leaving the rear end portion of an appropriate length L. On the other hand, a wire clip 19 for positioning the weir plate 12 with respect to the separator 13 is fixed on the front surface of the weir plate 12.

When the separator 13 is cut, since the embossed resin is used as its material, the separator 13 can be easily cut without difficulty with a cutter knife.
This means that the separator 13 is used without waste.

(B) Inserting the separator fixing member Next, the rear end portion of the separator 13 in such a state is inserted into the separator insertion hole 17a of the separator fixing member 17. In this case, the separator insertion hole 17a 13 is bored with an inner diameter slightly larger than the outer diameter, so that it can be easily inserted.

(C) Penetration of the Butter Pressing Member Next, the separator fixing member 17 in such a state is penetrated from its rear end into the conduit 16c formed inside the separator guide cylinder 16b. , The outer ring portion of the chuck 20 communicates with the conduit 16c.
It shall penetrate until it contacts 6d.

Then, a pair of square pipes 15, which are to be used as horizontal fluttering members, are
It is arranged at a predetermined position so as to be pressed by a. In this case, the operator presses the pair of square pipes 15 by hand.

(D) Fixing by camber Finally, the rear end of the camber press-in hole 18a and the wing 16a
The camber 18 is hit with a hammer (not shown) in order to press-fit the camber 18 with the rear end.
Each time the tapping is performed, the chuck 20 is pressed by the contraction ring 16d, so that the chuck 20 contracts and the rear end portion of the separator 13 is fastened. As a result, the separator 13 is securely pressed against the flutter pressing member 16. Will be fixed.

[0027]

As described above, according to the form fixing device of the present invention, a separator, a wing for supporting a flutter material, and a separator guide extending forward with a conduit inside. A flutter pressing member formed of a cylinder, a separator fixing member in which an insertion hole having a slightly larger inner diameter than the separator is formed around an inner axis, and a camber, and an outer wall portion is provided at a front end portion of the insertion hole. And a chuck that has a plurality of cuts in the axial direction and is capable of contracting and expanding.A camber press-fitting hole is provided at a rear portion of the insertion hole, and a separator is provided at a front end portion of the pipeline. When the securing member is penetrated into the separator guide cylinder, a shrink ring is provided to compress the chuck while pressing the chuck. The separator securing member penetrates the separator guide cylinder, and the rear end of the camber press-in hole and the rear end of the wing. When the camber is pressed into the chuck, the chuck shrinks and secures the separator, so that the separator does not rust and stains the surface of the structure, and cracks do not occur around the separator. Thus, it is possible to quickly and easily fix the formwork on site while avoiding a situation in which water leakage occurs due to the above.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an outline of a mold fixing device according to the present invention.

FIG. 2 is a plan view and a cross-sectional view showing an embodiment of a mold fixing device according to the present invention.

FIG. 3 is a detailed explanatory view showing a wire clip and a chuck constituting one embodiment of the formwork fixing device according to the present invention.

FIG. 4 is a process diagram showing a fixing process of the formwork apparatus to which the embodiment of the formwork fixing device according to the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Separator 2 ... Flap holding member 2a ... Wing 2b ... Separator guide cylinder 2c ... Pipe line 2d ... Shrink ring 3 ... Separator fixing member 3a ... Insertion hole 3b ... Cut 3c ... Chuck 4 ... Camber 4a ... Camber press-fitting hole 11 ... Formwork fixing device 12 ... Weir board 13 ... Separator 14 ... Girder 15 ... Square pipe 16 ... Flap holding member 17 ... Separator fixing member 18 ... Camber 19 ... Wire clip 20 ... Cleaving S ... Weir board T ... Vertical fluttering material Y ... Horizontal flap wood

Claims (4)

[Claims] 1. A wing for supporting a separator (1) for determining the position of a weir plate (S) and a pair of horizontal flutter materials (Y) or vertical flutter materials (T) for holding said weir plate (S) from the rear side. (2a) and a flap holding member (2) extending forward from a substantially central portion of the wing (2a) and comprising a separator guide cylinder (2b) having a pipe (2c) formed around an internal axis. A separator fixing member (3) having an insertion hole (3a) having an inner diameter slightly larger than the outer diameter of the separator (1) around the inner axis from the front end; A formwork fixing tool comprising a camber (4) fixed to a holding member (2), wherein a front end portion of the insertion hole (3a) has an outer diameter dimension increasing toward the front. Form a gradient on the outer wall,
Further, a chuck (3c) having a plurality of cuts (3b) in the axial direction so that each divided piece can be contracted and opened is provided, and a camber (4) is press-fitted into the rear portion of the insertion hole (3a). While a camber press-fitting hole (4a) is provided, each of the chucks (3c) is provided at a front end portion of the pipe (2c) when the separator fixing member (3) penetrates the separator guide cylinder (2b). A shrink ring (2d) for shrinking while pressing the divided piece is provided. The rear end portion of the separator (1) provided through the weir plate (S) is inserted into the insertion hole (3a), and the camber is press-fitted. Rear end of hole (4a) and wing (2a)
A chuck (3c) contracts by press-fitting a camber (4) between the rear end and the rear end of the mold to fix the separator (1). 2. The mold fixing device according to claim 1, wherein a wire clip is disposed on the separator (1) on the front surface of the weir plate (S). 3. The mold fixing device according to claim 1, wherein the separator (1) is made of a synthetic resin. 4. The mold fixing device according to claim 2, wherein the separator (1) made of the synthetic resin has irregularities on its peripheral surface.