JPS6145741B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a concrete formwork used when pouring a cloth foundation for general residential concrete foundations.

PRIOR ART Foundation concrete F, which is mainly used as a foundation for wooden buildings, is composed of a base part and a cloth foundation part, and has various corner parts as shown in FIG. When pouring the end E of the foundation concrete F, conventionally, as shown in Fig. 2, the end form 1, which has a substantially U-shaped cross section, is attached to two standard panels 2 placed in parallel with a hook. It was used fixed by 3. The thickness of foundation concrete F is often 120mm,
The length may vary between 90 and 150 mm depending on the house. Therefore, in the past, many types of end molds 1 with different dimensions were prepared in advance and used as needed. This required a large storage space, which was inconvenient.

Purpose This invention aims to eliminate the above-mentioned conventional defects and provide a concrete formwork that can be used for pouring foundation concrete of any thickness and that can be used for many other purposes.

Embodiment An embodiment embodying the present invention will be described below with reference to the drawings.The first formwork 4 is constructed by welding a square pipe to the other end of a steel plate whose one end is bent into an L-shape. , a side wall 5 and a support wall 6 are each arranged at right angles to the concrete contact wall 7. A fastener mounting plate 9 is provided on the outside of the support wall 6 in parallel with the support wall 6 so that a loose insertion gap 8 is formed. Nuts 10 are welded at three locations on the inside of the fastener mounting plate 9, and a slide plate 14 (described later), which is inserted into the loose insertion gap 8 by screws 11 screwed into the nuts 10, is inserted against the support wall 6. It is designed to be firmly fastened and fixed. In addition, latching holes 12 are provided at three locations on the side wall: an upper portion, a central portion, and a lower portion.

In the second formwork 13, one end of the slide plate 14 is bent at a right angle, and both side walls 15a and 15b forming a connecting part with another formwork (standard panel 2) are formed at right angles to the bent part. It is welded. Guide holes 16 are formed in the upper, middle, and lower parts of both side walls 15a and 15b, respectively, and guide rods 1
A fastener 1 in which a hook-shaped hook portion 17b is welded to 7a.
7 along the guide hole 16, the both side walls 15a, 1
It is attached so that it can be moved between 5b.

Next, a method of using the concrete form constructed as described above will be explained. When using this concrete formwork, the side wall 5 of the first formwork 4 is brought into contact with one end of the standard panels 2 arranged at predetermined intervals as shown in FIGS. 4 and 5. In this state, the tip of the guide rod 17a of the fastener 17 attached to the standard panel 2 is inserted into the hook hole 12 of the first formwork 4, and the side wall 5 is clamped by the hook-shaped hook portion 17b. , the first formwork 4 and the standard panel 2 are firmly fastened and held.

Next, the slide plate 14 of the second formwork 13 is inserted into the loose insertion gap 8 of the first formwork 4 and adjusted to a position where the side wall 15a abuts the standard panel 2.
Next, the second formwork 13 is fastened and fixed to the standard panel 2 using the fasteners 17 attached to the second formwork 13 . Finally, the slide plate 14 is fastened and fixed to the support wall 6 by the screws 11 attached to the fastener mounting plate 9 of the first formwork 4, thereby completing the assembly of the concrete formwork. After pouring concrete in this state and forming the foundation concrete F, the connection between the forms is released and the foundation concrete F is formed.
Remove and reuse. Conventionally, as shown in Fig. 2, a U-shaped end formwork 1 was used or two outside corner formworks were combined to form a formwork for the ends of the foundation concrete F. In contrast to the conventional method of preparing many types of formwork with various dimensions and selecting one that corresponds to a given thickness from among them, using this formwork,
Even when the thickness of the foundation concrete F is changed in various ways, it can be adjusted to a predetermined thickness by an extremely simple operation of loosening the chimney screws 11 when forming the formwork, adjusting the movement of the slide plate 14, and then tightening the chimney screws 11. A formwork is created.

If the bending direction of the slide plate 14 of the second formwork 13 in this embodiment is reversed,
Even when pouring crank-shaped foundation concrete F as shown in FIG. 6, the concrete formwork can be easily assembled by simply combining it with the standard panel 2. In residential fabric foundations, fabric foundations with crank-shaped parts with such small steps are often constructed, but by using this formwork, changes in the step dimensions can be handled extremely easily. be able to.

In addition, by using a straight slide plate 14 as the second formwork 13, it can be used as a formwork for a right-angled outer corner when pouring the corner part of the foundation concrete F, as shown in Fig. 7. can do.

Furthermore, as shown in FIG. 8, by configuring the slide plate 14 to be bendable with a hinge 18,
As shown in FIG. 9, it can be used as a formwork for an outside corner when pouring a modified foundation concrete F.

Another Embodiment Next, another embodiment in which the present invention is embodied in a concrete formwork for civil engineering will be described with reference to FIGS. 10 to 13.

In this embodiment, the first formwork 19 and the second formwork 20 are made of a steel material that is thicker than the formwork for the foundation concrete, and the fastening hooks 21 for connecting the formworks are used. The points that an insertion hole 22 for insertion is provided in the peripheral wall, that a non-slip member 24 is formed on the side opposite to the concrete contact surface of the slide plate 23, and that a reinforcing member 25 is welded. This is different from the previous embodiment.

As shown in FIG. 12, this civil engineering concrete formwork is fastened using a fastening hook 21 having a clamping portion 21b extending in an arc shape from one end of a hooking portion 21a formed in a substantially L-shape. The concrete formwork for civil engineering of this embodiment is used by assembling a large number of concrete formworks in a stacked state as shown in FIG. 13. Therefore, unlike the case of pouring the foundation concrete F described in the previous embodiment, since the height of the concrete to be poured is high, the pressure applied to the formwork assembled at the lower part becomes very large. However, the slide plate 23 is provided with a non-slip member 24,
Since the slide plate 23 is firmly fastened to the first formwork 19 by the screws 11, there is no risk that the slide plate 23 will move under the pressure of concrete and the assembled formwork will be deformed. In this case, by making only the parts forming the free insertion gap strong, there is no risk of deformation even when the slide plate 23 is strongly tightened with the screws 11.

Note that it is also possible to change the shape of the slide plate 23 of the second formwork 20 as shown in FIGS. 14 and 15. If a second formwork with the shape shown in Figure 14 is used, it can be used as a formwork for right-angled outer corners in the same way as explained in Figure 7, and if a second formwork with the shape shown in Figure 15 is used, A crank-shaped formwork can be easily formed in the same way as explained in Fig. 6. When constructing a retaining wall in civil engineering work, it is common practice to use formwork on only one side and pour concrete with the other side in direct contact with the soil.
In this case, the shape of the formwork is often crank-shaped or right-angled. Therefore, these molds can be formed very easily by using the molds described above.

Effects This invention includes a first formwork in which a free insertion gap is formed at one end thereof at right angles to the concrete contact wall, and a slide plate that is inserted into the free insertion gap so as to be movably adjustable. A second formwork is provided with a connecting part to the formwork, and a fastener for fixing the inserted slide plate at an arbitrary position is provided on the first formwork, so that the desired thickness can be achieved. There is no need to prepare a large number of formworks in advance for pouring foundation concrete, and storage space is also small. Also,
By simply changing the attachment state of the slide plate and the connecting portion of the second formwork, it can be used as a formwork for the end of foundation concrete, a crank-shaped formwork, or an outside corner formwork.

[Brief explanation of the drawing]

FIG. 1 is a plan view of foundation concrete, FIG. 2 is a perspective view showing a conventional concrete formwork, and FIG. 3 is a partially broken exploded perspective view showing an embodiment of a concrete formwork embodying the present invention. Fig. 4 is a partially cutaway perspective view showing the state of use, Fig. 5 is a plan view,
Figures 6, 7, and 9 are plan views showing how the modified concrete formwork is used, Figure 8 is a perspective view showing a modified example of the second formwork, and Figures 10 and 11 are views of another example. FIG. 12 is a perspective view showing the fastening hook, FIG. 13 is a partially cutaway perspective view showing the state of use, and FIG.
4 and 15 are perspective views showing modified examples. First formwork 4, 19, second formwork 13, 20,
Concrete contact wall 7, free insertion gap 8, chisel screw 11, slide plates 14, 23.

Claims (1)

[Claims] 1. A loose insertion gap 8 is provided at one end of the concrete contact wall 7.
a first formwork 4, 19 formed at right angles to the
It consists of a second formwork 13, 20 which has a connecting part with another formwork at one end of the slide plate 14, 23 which is inserted into the loose insertion gap 8 so that its movement can be adjusted. A concrete formwork characterized in that the first formworks 4, 19 are provided with fasteners for fixing the first formworks 14, 23 at arbitrary positions. 2. The concrete formwork according to claim 1, wherein the slide plate 14 is formed to be bendable.