JPH03100230A - Coil-shaped mold frame and attitude holding tool - Google Patents

Abstract

PURPOSE:To facilitate transportation and laying by bending an iron reinforcement into a proper shape and winding it into sprial form. CONSTITUTION:A coil-shaped mold frame 10 which can be extended and contracted in the longitudinal direction is formed by bending an iron reinforcement 11 into square shape and winding it into spiral form.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a coiled formwork used for constructing a concrete structure on a slope or an artificial slope, and a posture support for the same.

Conventional technology and its problems When constructing a concrete structure on a slope or artificial slope, 1. Usually, first, a net structure is laid, reinforcing bars are placed on top of it in a lattice pattern, and concrete is poured on top of the reinforcing bars. The structure is then molded.

In recent years, due to the aging of the workers involved in such work and the shortage of skilled workers, it has become difficult to work mainly with long reinforcing bars. . Furthermore, since concrete is simply placed on top of the reinforcing bars, there is also the problem that the scenery is likely to be spoiled.

Means to solve problems The present invention consists of fi + spirally wound reinforcing bars.

a coiled formwork that is freely expandable and contractable in the longitudinal direction; (2) a formwork posture holder comprising a main reinforcement extending in the longitudinal direction; and a gripping arm that is fixed to the main reinforcement and grips the formwork; and (3) The above-mentioned problem has been solved by a formwork posture holding tool having a main reinforcement having a plurality of notches and extending in the longitudinal direction, and a gripping arm that is fitted into the notches and grips the formwork.

Function The coiled formwork is hollow, and may be, for example, circularly wound, squarely wound, or triangularly wound. These formworks are expandable and retractable from a contracted position to an extended position. It is transported from the manufacturing factory to the workshop in a contracted position, and at the site where it will actually be laid, it is stretched and actually laid by workers.

The stretched coiled formwork functions as a formwork by maintaining a constant narrow spacing. That is, the spirally stretched reinforcing bars prevent the concrete placed in the formwork between the respective lines from flowing out, and function as a concrete formwork.

The formwork posture holding tool maintains the coiled formwork in a spiral shape and keeps the direction in which the spiral extends substantially straight by holding reinforcing bars at predetermined intervals with a gripping arm.

Example Hereinafter, the present invention will be described in detail with reference to the drawings.

Figures 1 to 3 are examples of coiled formwork, Figures 4 to 10 are examples of formwork posture holders, and Figures 11 to 1.
Figure 3 shows an example of a concrete structure.

Figure t51 is a perspective view of the rectangular coiled formwork 10. This coiled formwork 10 is made of reinforcing bars 11, which are bent into a rectangular shape and wound spirally. This formwork 10 can be expanded and contracted in the longitudinal direction.

FIG. 2 is a perspective view of the coiled formwork 12 wound into a triangular shape, and FIG. 3 is a perspective view of the coiled formwork 14 wound into a circular shape. Another structure is the coiled formwork 10 in FIG.
is the same as

Such coiled formworks 10, 12, 14 can assume both a contracted state and an expanded state. It is transported in a contracted state, and then stretched out on the slope or artificial slope where it will actually be laid.

At the construction site, the coiled formwork can move in the direction perpendicular to the longitudinal direction when stretched, so even if there is a ridge on the slope or artificial slope on which it is being laid, the coiled formwork will not erect the ridge on its own. You can follow the shape.

Furthermore, since the coiled formwork is formed from -1 reinforcing bars, it is not necessary to assemble a plurality of reinforcing bars, etc., and construction is simple. In the coiled formwork that has been laid, the reinforcing bars form a so-called sling 1-, which prevents the poured concrete from flowing out. Note that although the present invention is not limited to the following,
The spacing between the slits is typically 5 to ioam.

When it is necessary to accurately maintain the posture of the coiled formwork described above, the formwork posture holding tool described below is useful.

FIG. 4 and FIG. 5 are examples of the formwork posture holding tool. The formwork posture holder 20 includes a flat plate-shaped main bar 22 extending in the longitudinal direction and a gripping arm 24 that grips the reinforcing bar 11.

The gripping arm 24 is fixed to the flat surface 23 of the main reinforcement 22 with screws or the like, and has an opening 26 in a direction perpendicular to the longitudinal direction. opening 2
6 grips the reinforcing bars 11 of the coiled formwork 10 by elasticity.

Therefore, it is desirable that the material of the gripping arm 24 is made of resin. Further, for convenience of transportation, it is desirable that the main reinforcement 22 is also made of resin. Furthermore, by incorporating glass fibers into the resin, their strength can be increased, and the function of maintaining the coiled formwork 10 in a helical manner can also be improved.

Next, FIG. 6 shows a formwork posture holding tool 30 with a modified structure for attaching the above-mentioned gripping arms. This gripping arm 34
It has a structure in which the end portion is buried inside the 2.

Next, FIGS. 7 and 8 show modified examples of the formwork posture holder shown in FIG. 4. In other words, this is a formwork posture holding tool 40 having a structure in which reinforcing bars are used as the main reinforcements 42. The other configurations are the same as those in FIG.

Next, FIGS. 9 and 10 show another formwork posture holding tool 50. In this formwork posture holder 50, the main reinforcing bars 52 and the gripping arms 54 are constructed from different members. Main reinforcement 52
A plurality of notches 53 are formed at intervals in the longitudinal direction. The gripping arm 54 is fitted into this notch 53. In the formwork posture holding tool 50 having this configuration,
The gripping arm 54 can be selectively present only in the portion where the posture of the coiled formwork is desired to be adjusted.

FIG. 11 shows a state in which the above-described coiled formwork and formwork posture holder are assembled. The coiled formwork shown in Fig. 1 and the formwork posture holder shown in Fig. 4 are used. However, it goes without saying that the present invention is not limited to these, and that other coiled molds and other mold posture retainers can be used.

As illustrated, the gripping arm 24 grips the reinforcing bar 11 of the coiled formwork 10. At this time, the main reinforcing bars 22 to which the gripping arms 24 are fixed maintain the coiled formwork 1o in a straight line and form a straight edge at the upper part. Figure 12 shows a concrete structure 60 where concrete is poured.
The main reinforcing bars 22 serve as a reference for the external shape of the concrete structure 60.

In this way, the main reinforcing bars 22 function to trim the top and side edges of the concrete structure 60.

Note that returning to FIG. 11, inside the coiled formwork 10,
Straight reinforcing bars 18 may be placed before concrete placement to adjust the posture.

FIG. 13 shows the entire concrete structure 60 constructed in this manner. Concrete structure 60
is at the vertical and horizontal intersection 64.

Concrete structures can be placed without interfering with each other. In other words, in the past, one of the concrete structures had to be cut off, but
According to the concrete structure 60 of the present invention, since the coiled formwork 10 (12, 14) can be arranged continuously both vertically and horizontally, a concrete structure with high strength can be constructed.

Effect of the invention Since the present invention has the above configuration, it has the following effects.

(1) The coiled formwork according to claim 1 is easy to transport, does not require the conventional mesh formwork, and can be laid along the ridges of slopes and artificial slopes.

(2) The formwork posture holder according to claim 2 is capable of maintaining the above-mentioned coiled formwork in a substantially straight shape, and
By determining the outline of the external shape of a concrete structure, a structure with good scenery can be obtained.

(3) In the formwork posture holder according to claim 3, the position at which the coiled formwork needs to be held can be set freely, so that the formwork can be easily assembled.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a coiled formwork, Fig. 2 is a perspective view of another coiled formwork, Fig. 3 is a perspective view of yet another coiled formwork, and Fig. 4 is a formwork posture holding device. FIG. 5 is a partial enlarged view of the formwork posture holding device shown in FIG. 4, FIG. 6 is an enlarged perspective view of another formwork posture holding device, and FIG. 7 is another formwork posture holding device. , FIG. 8 is a partially enlarged view of the formwork posture holder shown in FIG. 7, and FIG. 9 is an exploded perspective view of another formwork posture holder,
Fig. 10 is a new view of the formwork posture holding device shown in Fig. 9, Fig. 11 is a front view when the coiled formwork shown in Fig. 1 and the formwork posture holding device shown in Fig. 4 are assembled, and Fig. 12 The figure is a new view of the concrete structure, and FIG. 13 is an overall plan view of the concrete structure (however, the spacing between adjacent lines of coils is exaggerated). 11 ・ 20゜22゜24゜60 ...Reinforcement bar 30.40,50...Formwork posture holder 32.42.5
2... Main reinforcement 34. 44, 54... Gripping arm... Concrete structure 10.12.14... Coiled formwork Fig. 11

Claims (3)

[Claims] (1) A coiled formwork made of spirally wound reinforcing bars that can be expanded and contracted in the longitudinal direction. (2) A formwork posture holding device comprising a main reinforcement extending in the longitudinal direction and a gripping arm fixed to the main reinforcement and gripping the formwork according to claim 1. (3) A main reinforcement having a plurality of notches and extending in the longitudinal direction;
A formwork posture holding tool comprising a gripping arm that is fitted into the notch and grips the formwork according to claim 1.