JPS5836153B2 - Positioning bracket for concrete formwork - Google Patents

Description

[Detailed description of the invention] The present invention relates to a positioning fitting for concrete formwork.

Conventionally, foundation work for structures using concrete has been carried out as shown in Fig. 1. Several days after pouring concrete 1, the left side formwork 3 is placed on top of the concrete base 2, and the supporting timbers 4,
4', fix the formwork, and attach the upper strut tree 5 to the left side formwork 3.
The right formwork 6 is placed on the concrete base 2, and the formwork 6 and the upper strut 5 are fixed by nailing, and the lower strut 7 is attached to the left and right formworks 3, 6. The lower end corners of the formworks 3 and 6 and the splints 8 and 8' are fixed by nailing, and the tension metals 9 are inserted into the two insertion holes drilled in the formworks 3 and 6, respectively. Insert it and tighten the tension metal 9.

During this period, the formworks 3 and 6 remain in an unstable state until the final stage, and therefore, forming the formwork using the conventional method requires a lot of time, effort, and effort by repeatedly dropping the water system and checking the verticality of the formwork.
It required skill to assemble.

The present invention eliminates such inconveniences and provides a metal fitting for positioning a mold for efficient mold assembly work.

The embodiments of the present invention will be described in detail below. The metal fittings 10 for positioning the lower ends of the formworks 3 and 6 have shapes as shown in FIGS. It is fixed to the end surface of the enlarged lower end portion 16 (Fig. 6) of 3, 6 with a nailer 14 to position the lower end of the formwork 3, 6, and the metal fitting 11 is as shown in Figs. T to 10. It has a shape, mainly the upper end (bulge part) end face 1 of the formwork 3, 6
3 (FIG. 11) with nails 14.

Each of the metal fittings 10 and 11 has a spacer 12 that protrudes symmetrically in the width direction, bends, and has formwork spacing holding end surfaces 17 and 17' perpendicular to the longitudinal force direction, making it easier to drive the nails 14. It has a nail hole 18 for.

Furthermore, the metal fitting 10 has an insertion hole 20 for a lever rod 19 for wrapping the formwork holding part 15 into the enlarged part 16 at the lower end of the formworks 3 and 6 (Fig. A nail hole 22 for fixing the metal fitting 10 to the base surface 2 by driving a nail 21 thereon is bored inside the central part of the metal fitting in the width direction.

Next, a detailed explanation will be given of how to assemble a formwork for foundation concrete of a structure using the metal fittings of the present invention.

(1) First, several days after pouring concrete 1, ink the center line 23 on the concrete base 2 (12th
), the metal fitting 10 is placed symmetrically on the center line 23 as shown in FIG. 12, and the nailing 21 is performed (FIGS. 12 to 13).

(2) After that, place the metal fitting 10 on the metal fitting 10 with the formwork spacing retaining end surface 17' of the metal fitting 10 in contact with the concrete pouring side wall surface of the right side formwork 6 (Figs. 14 and 6). ), wrap the formwork holding part 15 of the metal fitting 10 into the enlarged part 16 at the lower end of the formwork, and insert the lever bar 19 into the insertion hole 20 of the holding part,
As shown in FIG. 6, the holding portion 15 of the metal fitting 10 is pressed onto the enlarged portion 16 of the formwork using the lever principle and nailed.

For the left side formwork 3, the lower parts of the formworks 3 and 6 are positioned and fixed in the same manner as described above.

Although the accuracy is somewhat inferior when forming metal fittings with a thin plate, it is possible to wrap the holding portion 15 into the large part of the formwork with the operator's fingers.

(3) Next, as shown in Fig. 11, the spacer 12 of the other metal fitting 11 is fitted between the formworks 3 and 6, and the holding part 15 is driven with nails 14, and the retaining barrel 4 (Fig. 15) is inserted. Supporting the formwork 6, the first
The assembly of the formwork is completed as shown in Figures 5 to 17.

(4) After filling, concrete IJ for standing up in formworks 3 and 6
-} 2 4 (Fig. 15), and after the concrete 24 has hardened, the retaining barrel 4 and the nails 14 are pulled out, and the metal fittings 11 and formwork 3, 6 are removed.

At this time, the metal fitting 10 of the present invention is attached to the concrete 24 for erection.
It remains embedded in the bottom of the body and is disposable.

As shown in FIG. 18, if the nail 14 is a temporary nail having two flanges on the head, the nail removal operation becomes easy and the formwork 3, 6 can be removed easily and quickly.

Although the embodiment has been described with reference to the basic formwork, the metal fittings of the present invention are not limited to this, and can be used between formworks assembled in multiple stages even in the construction of walls of structures.

That is, as shown in FIG. 19, the wall formwork is assembled by using the main metal fittings 10 at the positions marked with circles on each of the formworks 3 for wall construction, and using other metal fittings 11 at the positions marked with triangles. It can also be done.

The structure of the present invention is that a nail hole 22 for fixing the metal fitting to the concrete base by nailing is bored in the central part 12' of the metal fitting, and a pair of nail holes 22 are provided at one end in the width direction of the central part 12'. A formwork holding part in which a spacer 12 that is fitted between the concrete formworks 3 and 6 is erected, and the both ends of the metal fitting in the longitudinal force direction are caught in the enlarged part of the lower end of the formwork and fixed by nailing. 15, and the formwork retaining portion 15 is provided with a lever insertion hole 20 for winding the retaining portion.

The metal fitting of the present invention has the above-mentioned configuration, and the formwork holding part 15 is provided with the lever insertion hole 20 for rolling in the holding part. Lever bar 1
9 is inserted, and the formwork retaining portion 15 of the metal fitting can be clamped onto the formworks 3 and 6 using the lever bar 19 as shown in FIG.

Since the nails 14 can be applied to the holding portions in such a pressed state, the lower portions of the formworks 3 and 6 can be easily and firmly fixed.

Thus, the mold is positioned and fixed in a state in which the inner surface of the mold is pressed against the mold gap maintaining end surface 17 of the spacer 12.

Therefore, the spacing between a pair of opposing formworks is set accurately,
Based on this, it is possible to accurately maintain the thickness of concrete, and it also has the effect of making it possible to maintain a good-looking concrete structure.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a conventional concrete formwork, and FIGS. 2 to 5 show positioning fittings for a concrete formwork according to the present invention, respectively.
represents. Figure 6 is an elevational explanatory view showing the assembly of the formwork with this metal fittings;
FIGS. 7 to 10 show other metal fittings 11, and are respectively perspective views and
Represents a plan view, an elevation view, and a mid-section side view. Figure 11 shows the formwork using this metal fitting, and the 12th to 14th
The figure shows an explanatory view of placing and fixing the metal fitting on the base surface 2. 15 to 17 show an elevation view, a plan view, and a left side view of a formwork assembled using the metal fittings of the present invention. FIG. 18 shows temporary nails for fixing the metal fittings. FIG. 19 shows an explanatory diagram of wall construction. 1... Underlay concrete, 2... Concrete base, 3
・・・・・・Formwork, 4・・・・Ball wood, 5・・・・
...Tension wood, 6...Formwork, 7...
・Tension tree, 8...Splint, 9...
Harikin, 10...Metal fittings, 11...Metal fittings,
12...Spacer, 12'...Central part of metal fitting, 13...End face of formwork, 14...Drive nail, 15...Mold Frame holding part, 16... lower end enlarged part, 17... formwork interval holding end surface, 17'
...... Formwork spacing maintenance end surface, 18... Nail hole, 19... Lever bar, 20... Lever rod insertion hole, 21... - Nail, 22... Nail hole,
23...Center line, 24...Concrete for erection.

Claims (1)

[Claims] 1. A nail hole 22 for fixing the metal fitting to the concrete base 2 by nailing is drilled in the central part 12' of the metal fitting.
A spacer 12 that is fitted between the pair of concrete formworks 3 and 6 is erected at the width direction end of the metal fitting, and the spacer 12 is installed at both ends of the metal fitting in the longitudinal force direction so that the nails are caught in the lower end enlarged part 16 of the formwork. A positioning fixture for concrete formwork, which is provided with a formwork holding part 15 to be fixed by hammering, and has a lever insertion hole 20 for rolling the holding part into the formwork holding part 15.