JP2592585B2 - Formwork for ventilation holes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation hole form for forming a foundation ventilation hole.

[0002]

2. Description of the Related Art Generally, a ventilation hole for a foundation is formed by inserting a ventilation gallery into a ventilation hole formed at a predetermined position on a concrete foundation, positioning the ventilation gallery, and then attaching an upper edge piece and a lower edge piece of the ventilation gallery to a mortar. The ventilation gallery is attached to the ventilation hole by being fixed from the outside with a fixing member such as. But,
In such a method, when mounting the ventilation gallery, it is difficult to position the ventilation gallery with respect to the ventilation hole, and the installation work is troublesome, and the ventilation gallery may be attached to the ventilation hole at an angle. In particular, the work of installing the ventilation garbage in a narrow place close to a house has become more troublesome.

[0003] Therefore, conventionally, the ventilation hole formwork is divided into an indoor side and an outdoor side, and a ventilation gully is formed between the two ventilation hole forms. After fixing the formwork for both ventilation holes while holding it so that it protrudes,
A method has been adopted in which the foundation formwork on which the two ventilation hole forms are arranged is filled with concrete to form ventilation holes and at the same time install ventilation gallery.

[0004]

However, as shown in FIG. 5, the ventilation holes for the foundation formed by the above-described conventional method of arranging the ventilation holes simultaneously with the formation of the ventilation holes, as shown in FIG. In the embedded portion c in which the lower edge piece b is embedded and fixed, the outdoor lower surface d and the indoor lower surface e of the ventilation gallery a are formed at the same level. It becomes higher than the indoor lower surface e by the thickness of the mortar f. For this reason, rainwater g or the like that has infiltrated into the indoor
As a result, there is a problem that the air is blocked and accumulated, thereby causing corrosion of the ventilation gallery a and the like.

[0005] To solve the above problem,
As shown in Japanese Utility Model Laid-Open No. 57-129853, 2
Provided is a ventilation hole form in which the lower surface of the indoor side form is formed to be higher than the lower surface of the outdoor side form, among the pair of divided left and right forms, and the ventilation hole form is provided. By forming a ventilation hole for foundations, a step is formed in which the outdoor side of the ventilation hole for foundations becomes low, and the above-mentioned inconvenience of infiltration of rainwater and accumulation on the indoor side has been solved.

[0006] However, in the above-mentioned conventional device, the left and right forms are divided into two separate sets, and the left and right forms are separately formed in a dedicated shape. Sometimes, it is necessary to store the left and right parts separately in order to avoid confusion, and it is necessary to assemble while checking the left and right at the site, and there is a problem that workability is poor.

[0007]

The mold for ventilation holes according to the present invention comprises a pair of molds having the same left and right sides, and the mold has an opening at the front surface by an upper plate, a lower plate, a side plate, and a rear plate. The lower plate is formed to be inclined outward and the upper plate is formed substantially horizontal, while the peripheral edge of the rear plate is a protruding piece that clamps the peripheral edge of the ventilation gallery. Is protruding outward,
Further, on the outer surface of the rear plate, bosses are provided at least vertically projecting through the ventilation holes of the ventilation gallery when sandwiching the ventilation gallery between the left and right molds. Are formed, and are arranged so that the center of the through hole of the lower boss is located on a line hanging down from the center of the through hole of the upper boss. Is set to be larger than the distance from the center of the through hole of the upper boss to the upper end of the rear plate.

[0008]

With the same form of the left and right molds, a ventilation gallery is attached to the lower surfaces of the left and right molds with steps using the dimensional difference between the upper and lower bosses formed on the molds. A step lower than the indoor lower surface is formed on the outdoor lower surface of the formed ventilation hole.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 shows the structure of a foundation ventilation hole formed by the ventilation hole formwork of the present invention.

In FIG. 1, reference numeral 1 denotes a concrete foundation, and a ventilation hole 2 is formed at an appropriate position on the concrete foundation 1. The ventilation hole 2 is provided with a ventilation gallery 3 whose peripheral piece is embedded and fixed in the concrete foundation 1.

The lower surface of the ventilation hole 2 located on the outdoor side of the ventilation gallery 3 (hereinafter referred to as the outdoor lower surface 5 of the ventilation hole 2) is formed as a tapered surface inclined downward from the indoor side to the outdoor side. Rainwater or the like that is to enter the indoor side flows out to the outdoor side.

The lower surface of the ventilation hole 2 located on the indoor side of the ventilation gallery 3 (hereinafter referred to as the indoor lower surface 6 of the ventilation hole 2) is formed in a substantially horizontal plane. The lower surface 5 of the outdoor side of the ventilation hole 2 and the lower surface 6 of the indoor side of the ventilation hole 2
In the embedding portion 7 in which the lower edge piece 4 is embedded, the outdoor lower surface 5 of the ventilation hole 2 is formed stepwise so as to be lower than the indoor lower surface 6 of the ventilation hole 2. A finishing mortar 30 is applied to the outer surface of the concrete foundation 1 and the outer peripheral surface of the ventilation hole 2 formed as described above.

As the ventilation gallery 3, for example, a conventionally well-known one having a plurality of vertically long ventilation holes 3a formed in a horizontal direction as shown in FIG. 4 is used. And so on.
The lower edge piece 4 of the ventilation gallery 3 is buried so that the lower end of the ventilation hole 3a is substantially at the same level as the indoor lower surface 6 of the ventilation hole 2 and rainwater or the like that has penetrated more indoors than the ventilation gallery 3 has. Flows out of the room through the ventilation holes 3a.

Next, the structure of the ventilation hole formwork for forming the above-mentioned foundation ventilation hole will be described.

FIGS. 1 and 2 show the structure of a mold for ventilation holes according to the present invention.

The vent hole formwork 10 is composed of a pair of formwork on the left and right sides, and includes an outdoor vent form (form) 10a disposed outside the foundation formwork. , Indoor side ventilation hole formwork (formwork) 10 arranged on the indoor side of foundation formwork
b.

First, the mold 10a for outdoor ventilation holes will be described.
1, a lower plate 12, side plates 13, 13, and a rear plate 15 are formed in a box-like body having an open front surface. The lower plate 12 is formed to be inclined outward, and the upper plate 11 is formed substantially horizontally. In addition, a boss 16 having a through hole 16a is protruded from the outer surface of the rear plate 15.

The boss 16 is provided on the left and right of the upper part of the rear plate 15.
And a total of four at the bottom left and right.
Bosses 16, 16 through holes 16a, 16a of the lower two bosses 16, 16 on a line hanging down from the center of 16a,
It is arranged so that the center of 16a is located.

The two bosses 1 provided on the upper part
6, 16 are located at the rear plate 1 from the center of the through holes 16 a, 16 a.
The distance to the upper end of 5 is set to a dimension L (see FIG. 1),
The two bosses 16 provided at the lower part have through holes 16 formed therein.
The distance from the center of a, 16a to the lower end of the rear plate 15 is set to a dimension M (see FIG. 1), and these dimensions L and M are set so that the distance M is longer.

The diameter of the boss 16 is formed smaller than the width of the ventilation hole 3a so that the ventilation hole 3a of the ventilation gallery 3 can be inserted.
The boss 16 is set so that the ventilation holes 3a of the ventilation gallery 3 can be inserted when the molds 10a and 10b for the ventilation holes clamp the ventilation gallery 3.

Further, a projecting piece 17 projecting outward is formed on the peripheral edge of the rear plate 15, and this projecting piece 17 is formed as a holding portion for holding the peripheral piece of the ventilation gallery 3.

The outdoor ventilation hole form 10a thus formed is molded of, for example, a synthetic resin.
Reference numeral 18 in the drawing is a reinforcing rib.

The number of the bosses 16 is not limited to this example, but may be any number provided that the upper and lower numbers correspond to each other.

The indoor side ventilation hole form 10b is the same as the outdoor side ventilation hole form 10a, except that the outdoor side ventilation hole form 10a is simply turned upside down. is there. Therefore, the code | symbol is the mold 10a for outdoor ventilation holes.
And the description is omitted.

[0026] The form 10 for both ventilation holes thus configured.
a, 10b are arranged at predetermined positions of the foundation formwork 20 by the leg pieces 21.

The leg piece 21 is formed in a hook shape so that the upper part 22 can be hooked on the upper surface 20a of the foundation formwork 20.
A screw hole 24 is formed in the lower portion 23 that is bent stepwise. The material of the leg piece 21 is preferably a metal having high strength and durability, but is not limited to this. Note that the leg piece 21 is not limited to this example, and for example, one in which these two leg pieces 21 are integrated may be used. Also, the shape is not limited to this example.

Next, the procedure for forming a ventilation hole for a foundation using the ventilation hole formwork of the present invention configured as described above will be described.

First, the rear plate 1 of the outdoor ventilation hole form 10a.
The ventilation gallery 3 is sandwiched between the outer side ventilation hole form 10a and the rear plate 15 of the indoor side ventilation hole form 10b, which is obtained by turning the mold 10a upside down. That is, the projecting portions 17, 17 of both the ventilating hole frames 10a, 10b hold the ventilation louver 3 so that the peripheral edge pieces protrude outward by an appropriate length, and at the same time, both the ventilating hole frames 10a, 10b. The opposing bosses 16 are passed through the ventilation holes 3a of the ventilation gallery 3 so that the bosses 16 contact each other so that the through holes 16a of the bosses 16 coincide with each other.

At this time, the ventilation gallery 3 is set such that the lower end of the ventilation hole 3a substantially coincides with the outer surface of the upper plate 11 of the indoor ventilation hole form 10b.

The screw holes 24 of the leg pieces 21 are aligned with the through holes 16a of the boss 16 above the indoor ventilation hole form 10b from the inside of the rear plate 15 of the indoor ventilation hole form 10b. So that the wing bolts 25 are moved from the outdoor-side ventilation hole form 10a side to the through holes 16 of these bosses 16, 16.
a, 16a and screwed into the screw hole 24 of the leg piece 21.
As a result, the outdoor-side ventilation hole form 10a and the indoor-side ventilation hole form 10b are fixed with the ventilation gallery 3 sandwiched therebetween.

If the lower bosses 16, 16 are screwed with wing bolts 25 and nuts as necessary, the ventilation hole frames 10a, 10b can be more firmly fixed.

When the ventilation gallery 3 is clamped by the above-described outdoor-side ventilation hole form 10a and the indoor-side ventilation hole form 10b, the outdoor-side ventilation hole form 10a and the indoor-side ventilation hole form 10b Is formed in the holding portion of the boss 16 corresponding to the dimensional difference (ML) between the upper and lower bosses 16. The step is equal to or greater than the thickness of the finishing mortar 30 applied to the outdoor lower surface 5 of the ventilation hole 2 described above.

Then, the upper portion 22 of the leg piece 21 is hooked on the upper surface 20a of the foundation form 20 so that the ventilation
The molds 10a and 10b for ventilation holes, which hold the base, are arranged at predetermined positions on the mold 20 for the foundation.

After the arrangement, the foundation form 2
After the concrete is filled into the inside and solidified, the foundation formwork 20 is removed, and the wing bolts 25 are removed to remove the ventilation hole forms 10a and 10b indoors and outdoors, respectively. Thereby, the ventilation hole 2 in which the peripheral piece of the ventilation gallery 3 is embedded and fixed in the concrete foundation 1 is formed. On the indoor lower surface 6 and the outdoor lower surface 5 of the ventilation hole 2, a step corresponding to the step between the outdoor ventilation hole mold 10a and the indoor ventilation hole mold 10b, that is, the outdoor lower surface 5 is provided. A step lower than the indoor lower surface 6 is formed.

Subsequently, a finishing mortar 30 is applied to the outer side surface of the concrete foundation 1 and to the peripheral side surface of the ventilation hole 2 located outside the ventilation gallery 3 on the outdoor side. In particular, by applying a finishing mortar 30 to the outdoor lower surface 5 of the ventilation hole 2 so as to be substantially the same level as the indoor lower surface 6 of the ventilation hole 2 or lower than the indoor lower surface 6, as shown in FIG. Foundation ventilation holes can be formed.

As described above, when the concrete is poured, the peripheral pieces of the ventilation gallery 3 are buried in the concrete foundation 1 and fixed to the ventilation holes 2. Therefore, it can be reliably and easily arranged at a predetermined position of the ventilation hole 2. In addition, since the outdoor lower surface 5 is formed with a step lower than the indoor lower surface 6 in the ventilation hole 2, the finishing mortar 30 is applied to the outdoor lower surface 5 smaller than the step, thereby finishing the mortar. Since the coating 30 is not applied higher than the indoor lower surface 6 of the ventilation hole 2, rainwater or the like that has entered the indoor side of the ventilation gallery 3 is not blocked by the finishing mortar 30.

Moreover, since the two ventilation hole forms 10a and 10b forming the foundation ventilation holes are the same, mass production becomes possible and the cost can be reduced. There is no need to distinguish 10b for outdoor use or indoor use, and portability and construction are convenient.

[0039]

As described above, according to the mold for ventilation holes according to the present invention, the pair of molds for ventilation holes which are the same on the left and right sides are lower than the indoor lower surface on the outdoor lower surface of the ventilation holes. Since the step is formed, mass production of the ventilation hole formwork is possible, and the cost can be reduced. Further, it is not necessary to distinguish the left and right ventilation hole formwork from the outside or indoor side. Very convenient to carry and construction.
In addition, since the peripheral edge of the ventilation gallery is clamped by the protruding piece protruding from the peripheral edge of the rear plate, even if the ventilation gallery has a warp or other deformation, compared to the one that clamps the entire surface of the ventilation gallery, the ventilation It is possible to suppress the generation of a gap between the rattle and the mold. In particular, when the through hole at the center of the ventilation gallery is formed by punching, deformation is likely to occur around the through hole, and even in this case, the ventilation gallery is formed by the protruding piece protruding from the peripheral edge of the rear plate. Can be fixed without forming a gap between the mold and the ventilation gallery.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration when a ventilation hole formwork of the present invention holding a ventilation gallery is disposed on a foundation formwork.

FIG. 2 is a perspective view showing a mold for ventilation holes and leg pieces.

FIG. 3 is a cross-sectional view showing a structure of a ventilation hole for a foundation formed by a mold for a ventilation hole.

FIG. 4 is a front view showing a ventilation gallery.

FIG. 5 is a sectional view showing a structure of a conventional ventilation hole for foundation.

[Explanation of symbols]

 3 Ventilation gallery 10 Ventilation hole formwork 10a Outdoor ventilation hole formwork (formwork) 10b Indoor side ventilation hole formwork (formwork) 11 Upper plate 12 Lower plate 13 Side plate 15 Rear plate 16 Boss 16a Boss passage Hole 17 Projection L Distance from the center of the upper boss through hole to the upper end of the rear plate M Distance from the center of the lower boss through hole to the lower end of the rear plate

Claims (1)

(57) [Claims] 1. A left and right same form set comprising a set of molds, the form being formed in a box-like body having a front surface opened by an upper plate, a lower plate, a side plate, and a rear plate, and the lower plate being an outer side. The upper plate is formed substantially horizontally, while the rear plate is formed
The outer edge of the rim has a protruding piece that sandwiches the rim of the ventilation gallery.
Further, bosses are provided on the outer surface of the rear plate, at least vertically, through which ventilation holes of the ventilation gallery can be inserted when the ventilation gallery is sandwiched between the left and right molds. Is formed so that the center of the through hole of the lower boss is located on a line that hangs from the center of the through hole of the upper boss, and furthermore, from the center of the through hole of the lower boss. A mold for a ventilation hole, wherein a distance to a lower end of the rear plate is set to be larger than a distance from a center of a through hole of an upper boss to an upper end of the rear plate.