JPH061983Y2 - Formwork for underfloor ventilation holes - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to basic concrete, which is a base generally called a cloth concrete, in the construction of a house, especially a wooden house.
The present invention relates to a formwork for forming openings for ventilation under the floor and a lattice or a mesh for the ventilation holes supported by the formwork.

[Prior Art] Conventionally, as a foundation concrete foundation found in a wooden house, a concrete wall-shaped concrete foundation that is constructed according to the floor plan of the building is used. An anchor bolt is embedded in the foundation wall-shaped foundation in advance. Using anchor bolts,
The timber is fixed horizontally and it is set up in the right place. In this case, in order to maintain ventilation under the floor and prevent corrosion due to moisture in the house, a ventilation window is provided at an appropriate place on the concrete foundation.
In order to prevent mice and other small animals from creeping under the floor, it has been fitted with a vertical lattice-like frame or a net-like frame.

However, when placing the concrete foundation, since reinforcing bars were arranged to increase the strength of the foundation, this reinforcing bar frame arranged in a grid pattern is used for ventilation windows. On the other hand, it has been an obstacle in fitting and fixing a vertical lattice-shaped frame or a net-shaped component frame at the same time when concrete is driven. If this is described by a figure, as shown in FIG. 5, reinforcing bars 1, 1 ... for reinforcing the concrete wall as a base are arranged vertically and horizontally, and their intersections are connected by a wire or the like. A type of grid-like frame is formed, and weir plates (usually called panels) are placed in the center of this frame, and concrete is poured between these weir plates. It is often difficult to hold the lattice-shaped frame or net-shaped frame at the same position at the same time when pouring concrete, and therefore, the lattice-shaped frame or net-shaped frame that serves as ventilation holes is poured after pouring concrete. , The method of setting these frames separately was adopted. As a result, a part of the reinforcing bar lattice was cut out only in the area shown by the upper chain line in Fig. 5, another form was fitted in this part, and concrete was poured between the dam plates, after hardening of the concrete,
By removing the weir board and this formwork, a concrete foundation as shown in Fig. 6 is formed, and on the other hand, a laborious construction by a two-step construction method such as attaching a grid-like frame or a net-like frame to be ventilation holes is carried out. It was needed.

Construction by such a two-step process not only takes a long time in itself, but also requires labor, and it has been desired to somehow reduce the construction labor by a simple construction method.

[Problems to be Solved by the Invention] In the present invention, the inconvenience in the above-mentioned process is eliminated, and a frame for a ventilation hole which is already required at the time of concrete pouring is provided without using the two-step process. By setting them at the same time, it is intended to carry out efficient and economical construction.

[Means for Solving the Problems] In the present invention, a lattice-shaped reinforcing bar structure for reinforcing a concrete wall as a base is not cut off at all and is used as it is for ventilation. A formwork forming a hole,
A lattice or mesh for ventilation holes supported by this form is attached, and at the same time, the lattice or mesh is embedded and fixed in the foundation concrete by pouring concrete between the dam plates. For this reason, the mold for forming the ventilation holes is made of a fragile material such as Styrofoam, and is used to support a vertical lattice-shaped frame or mesh frame to be fitted into the ventilation holes in advance. , The formwork that forms the ventilation holes is divided into two parts with the vertical surface as the boundary so that they can be tyed to each other, and the existing rebar lattice is sandwiched by the abutment surface that should be tyed together. At the time of jamming, only the part facing the rebar grid was destroyed, enabling close tying with the rebar grid sandwiched.

[Operation] By doing so, when the concrete frame between the dam plates is poured by the normal construction method into the formwork of the present invention in which the rebar lattice is sandwiched in advance, the holes for the ventilation holes are all at once. A vertical grid-like frame or a net-like frame that should be fixed can be fixed together by pouring concrete, and construction can be done in one step. It is possible to prevent deterioration of strength.

[Embodiment] The present invention will be described in detail with reference to a preferred embodiment shown in the drawings.

1 is a rear view of the mold of the present invention, FIG. 2 is a plan view thereof,
FIGS. 3A and 3B are views showing the formwork of the present invention, in which two pieces are set as one set, on the respective slopes, and FIG.
FIG. 4 is a cross-sectional view taken along line IV-IV.

The formwork of the present invention not only has a three-dimensional shape for forming holes for ventilation, but also one of the two structures formed together with one set is fixed to the foundation together with concrete pouring. A fitting member for a ventilation hole having a vertical lattice shape or a mesh shape is attached and held. In the figure, 11 and 12 are a pair of formwork elements, and one of the formwork elements 12 is fitted with a fitting member N formed in a vertical lattice shape or a net shape.
The member N is usually made of a steel plate, a casting, or a metal net. The other formwork element 11 has a large recessed portion 15 formed on its tie-opposing surface, leaving a peripheral edge portion 13, and each formwork element 11 and 12 has a fragile property such as styrofoam. Made of material. Therefore, the peripheral edge portion 13 is so designed that when the reinforcing bar lattice is clamped on the facing tying surfaces of the respective formwork elements, only the portion facing the peripheral edge portion 13 is cut off with a cutter knife, a light-hand saw or a fingertip. . 16
Is a wedge-shaped projecting portion that is made to project in a part of the formwork element 12, and the other formwork element 11 corresponding to its outer shape is pierced with a recess 17 of the same shape to form each formwork element 11 and 12. They are fitted to each other and fixed to each other so that they can be carried as a set without being easily separated during transportation. 18 and 19 are
It is a reinforcing material such as a veneer plate laminated from the outer surface in order to use each element integrally as a mold, but these are not always necessary.

The formwork including the fitting member N of the present invention is placed in the foundation concrete to be set up as follows, and the required ventilation holes are formed simultaneously with the construction of the foundation wall W by the concrete placement.

As shown in FIG. 7, at the work site, the reinforcing bars 1, 1 ...
One formwork element 11 is applied to the lattice body constituted by, and the other formwork element 12 is applied from the opposite side so that the lattice body is sandwiched. Perimeter 13 of 11
However, the portion that abuts the reinforcing bar 1 may be cut off with an appropriate blade, such as a cutter knife or a light-hand saw, and in some cases, it may be peeled off with the fingertip. In FIG. 7, the portion indicated by the symbol M indicates the portion that has been cut or destroyed. In this way, the other formwork element 12 is applied from the other surface of the lattice-shaped composition of the reinforcing bar 1 with the peripheral portion 13 partially broken, and the lattice-shaped composition is attached. However, even at the time of this clamping, by fitting the wedge-shaped protrusion 16 into the recess 17 having the same shape, the respective formwork elements 11 and 12 can be fixed while the lattice-shaped composition made of the reinforcing bar 1 is sandwiched. In this way, after fixing the formwork of the present invention to the required ventilation holes, the weir plates are positioned on both sides according to the usual construction method, and concrete is poured between the weir plates to form the foundation wall W. To form. When the dam plate is removed after the concrete is solidified, if the mold of the present invention is collapsed by an external force, the vertical lattice-like or net-like fitting member N is projected in advance from the mold and is supported in the mold. Therefore, as shown in FIG. 9, it is fixed in the foundation wall W made of concrete.

[Advantages of the Invention] In the formwork of the present invention, the fitting member N is fixed to the foundation wall W at the same time as concrete pouring because the side and the lower part thereof are projected outward in advance. The work of cutting or bending a part of the grid-shaped structure by the reinforcing bar 1 prior to installation is omitted, and the strength of the foundation itself is not impaired by cutting or bending,
There is an advantage that construction can be performed very simply and efficiently in one step. Moreover, since the mold itself uses an easily fragile material such as inexpensive polystyrene foam, the material cost is small and it is extremely useful for practical use.

[Brief description of drawings]

FIG. 1 is a rear view of the mold of the present invention, FIG. 2 is a plan view thereof, and FIGS. 3A and 3B are perspective views of mold elements each consisting of two sets. The figure is a cross-sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a front view of a reinforcing bar lattice-like composition, and a diagram showing a rebar resection part by a conventional method with a dashed line encircling it, and FIG. , A front view showing a part of a foundation having ventilation holes formed by a conventional method, Fig. 7 is a front view showing a mode in which one of the formwork elements of the present invention is closely attached to a reinforcing bar lattice-like composition, FIG. 8 is a perspective view showing a state immediately before placing concrete using the formwork of the present invention, and FIG. 9 is a rear view of a ventilation hole completed using the formwork of the present invention. is there. 11, 12 ... Formwork element, 13 ... Peripheral part 16 ... Wedge-shaped protrusion, 17 ... Wedge-shaped recess N ... Vertical lattice or net-like fitting member M ... Damaged part

Claims (1)

[Scope of utility model registration request] 1. A fragile mold element 11 and a fragile mold element 12, wherein one mold element 11 has a peripheral edge on a surface facing the other mold element 12. A recessed portion 15 is formed by leaving the portion 13 and an inner expanded dovetail wedge-shaped recessed portion 17 is formed above the peripheral edge portion 13, and the other formwork element 12 has a vertical lattice that projects laterally and downwardly in advance. A mesh-shaped or net-shaped fitting member N is held, and a dovetail wedge-shaped protrusion 16 is formed on the surface facing the formwork element 11 so as to be slidably engaged with the recess 17, and one set of these is formed. A formwork for an underfloor ventilation hole, characterized in that an existing rebar lattice can be sandwiched by an abutting surface that is bounded by a vertical surface that divides the formwork elements 11 and 12 into two.