JPH07247676A - Concrete formwork - Google Patents

Abstract

(57) [Summary] [Purpose] The weir plate 2 can be easily used for constructions in which the attachment positions of the separators 11 are different, and can be used repeatedly. [Structure] A large number of holes 4 are provided in advance in the dam plate 2, and solid plugs 6a are used as plugs for closing the holes 4 and plugs 6c having separator holes 8 through which the separator 11 is inserted are used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete formwork used at a concrete pouring construction site.

[0002]

2. Description of the Related Art In a concrete formwork used for concrete pouring construction, when a concrete formwork is supported and fixed at an appropriate position, a space generally used for pouring concrete is secured by using a separator called a round separator. In order to attach this separator to the dam plate of the concrete formwork, a hole is made in the dam plate, and the separator is held through.

[0003]

Since the mounting position of the separator differs depending on the concrete pouring construction site, and the diameter of the hole provided in the dam plate also differs depending on the separator, when the concrete formwork is repeatedly used, the old hole should be removed. It was necessary to close it with a blind plug and reopen a new hole with a drill or the like.

The blind plug may be made of wood, resin, or the like. When the blind plug is driven into a hole, it is difficult to drive it cleanly so that it is flush with the surface of the weir plate. After casting, the plug marks remain unsightly. If it is repeatedly used several times, old hole marks will be formed in various places, making reuse difficult. For this reason, the number of times of use is limited to some extent, which causes a problem that the construction cost becomes high.

Further, in the above-mentioned conventional one, since the separator is directly inserted into the hole provided in the dam plate, when the same hole is repeatedly used, the diameter of the hole becomes large and the shape is deformed. However, even when trying to close this hole with a blind plug in different usage conditions after that, it was not possible to use a ready-made blind, and there was a problem that a large size plug had to be specially made and used. .

The present invention has been made in consideration of the above, and provides a concrete formwork which can easily use the weir plate for constructions in which the attachment positions of the separators are different and can withstand repeated use. That is the purpose.

[0007]

In order to achieve the above object, in the concrete formwork according to the present invention, a large number of holes 4 are provided in advance in the dam plate 2, and a solid plug 6a is used as a plug for closing each hole 4. And a stopper 6c having a separator hole 8 through which the separator 11 is inserted. In addition to the above-mentioned plugs 6a and 6c, a plug 6d having a water permeation hole 8 or a solid and transparent plug 6b is used.

[0008]

[Operation] A plug 6c having a separator hole 8 is fitted in each hole 4 provided in the barrier plate 2 at a position where a separator is used, and a solid plug 6a and a solid transparent plug at other positions. 6
Further, b is selectively fitted with a plug 6d having a water permeation hole 9 to close each hole 4.

[0009]

EXAMPLES Examples of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 is a concrete formwork, and this concrete formwork 1 is composed of a weir plate 2 that constitutes a concrete placing surface, a reinforcing rib 3 that is provided on the back side of the dam plate 2, and the like.
The dam plate 2 is provided with a plurality of holes 4 in advance. When the barrier plate 2 is thick and has a predetermined strength, the reinforcing rib 3 is not always necessary.

As shown in FIG. 2, this hole 4 has a two-step diameter of a large diameter hole portion 4a and a small diameter hole portion 4b in which the concrete placing surface side of the dam plate 2 has a large diameter, and also has a small diameter hole portion. Groove 5 on 4b
Is provided. The diameter of the small-diameter hole portion 4b of the hole 4 is sufficiently larger than the diameter of the separator penetrating the hole.

Reference numerals 6a, 6b, 6c and 6d are first, second, third and fourth stoppers which are removably fitted in the holes 4. Each of these plugs 6a, 6b, 6c, 6d comprises a large-diameter plug portion 7a that fits into the large-diameter hole portion 4a of the hole 4 and a small-diameter plug portion 7b that fits into the small-diameter hole portion 4b. Groove 5 on 7b
There is provided a ring-shaped ridge 7c that engages with each other, and any of these plugs 6a, 6b, 6c is fitted into the hole 4 of the dam plate 2 so as not to easily come out.

In each of the stoppers 6a, 6b, 6c, 6d, the first and second stoppers 6a, 6b are solid, and the first stopper 6a is opaque, and the second stopper 6a is also opaque.
Is solid and transparent (including translucent). The third plug 6c is provided with a separator hole 8 through which the separator is inserted in the axial direction. The fourth plug 6c is provided with a water permeable hole 9 in the axial direction, and a water permeable sheet 10 for sealing the water permeable hole 9 is attached to the surface on the large diameter plug portion 7a side.

The first, third and fourth stoppers 6a, 6b,
Although 6c is made of wood or resin, the second plug 6b, which is transparent or translucent, is made of transparent resin.

The state of use in the above structure is shown in FIG. A third plug 6c having a separator hole 8 is fitted in the hole 4 at the position where the separator 11 is used, and the other hole 4
The first, second, and fourth plugs 6a, 6b, and 6d are fitted to the holes to close the hole 4. At this time, the opaque first stopper 6a is used for most of the unused holes 4. Then, the transparent plug 6b is used at a position corresponding to a place where a jumper would be a problem when pouring concrete. Further, the fourth plug 6d having the water permeation hole 9 is appropriately used such that one plug is provided per predetermined area.

Then, the two dam plates 2 as described above are arranged so as to face each other, and the separator 11 is inserted into and fixed to the third plugs 6c having the separator holes 8 facing each other. . Needless to say, when the two barrier plates 2 are arranged to face each other, only the third plug 6c must face each other. The assembling of the separator 11 is performed by the vertical flap 12, the lateral flap 13, the rib washer 14, the nut 15 and the like.

By observing the state when the concrete 16 is cast between the two dam plates 2 and 2 with the transparent second plug 6b, the presence or absence of a jumper in this portion can be confirmed. The excess water in the concrete 16 is removed by the fourth stopper 6
The water-permeable sheet 10 of d and the water-permeable hole 9 are discharged to the outside. The fourth plug 6d is used to remove excess water during curing of the concrete 16, and need not be used when there is no excess water. The second plug 6b may not be used if there is no concern that a jumper will be formed.

When the concrete formwork 1 is repeatedly used, the mounting position of the separator 11 naturally changes, but in this case, the third plug 6c is replaced and used. Replacement of this stopper is easily performed by using a hammer. By repeatedly using the third plug 6c, the separator hole 8 may be deformed or the plug 6c may be damaged. In that case, the plug 6c should be discarded and a new one should be used. To use. Therefore, temporal damage due to the separator 10 of the barrier plate 2 is eliminated.

The diameter of the separator may differ depending on the concrete pouring site, but there is no problem if the diameter of the separator hole 8 of the third plug 6c is increased in advance.

[0019]

EFFECTS OF THE INVENTION According to the present invention, for constructions in which the mounting position of the separator 10 is different, the solid plug 6a and the plug 6c having the separator hole 8 can be simply used and can be used repeatedly. The setup work during use can be simplified.

Further, since the outer shapes of the stoppers 6a, 6d used in the respective holes 4 can be made the same, the stoppers 6a, 6d can be driven into the weir plate 2 in a constant posture.
It is possible to finish the concrete with the stopper, without the marks of this plug being unsightly and remaining on the concrete pouring surface.

Further, since the separator 10 is inserted into the stopper 6c and is not directly inserted into the hole 4 of the barrier plate 2,
The barrier plate 2 is prevented from being damaged by the separator 10, and the barrier plate 2 can be repeatedly used. Further, by using the transparent plug 6b, it is possible to confirm the concrete placing condition and prevent the occurrence of squid. Further, by using the plug 6d having the water permeation hole 9, excess water during curing of the concrete 16 can be discharged. Further, since the transparent stopper 6b for checking the jumper is used only in a portion where it is necessary, the number of the relatively expensive transparent stopper 6b can be small, and the cost for checking the presence or absence of the jumper can be reduced. Can be lowered.

[Brief description of drawings]

FIG. 1 is a perspective view showing a concrete formwork in an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main part of a barrier plate.

3A is a sectional view showing a solid stopper, FIG. 3B is a sectional view showing a solid and transparent stopper, and FIG. 3C is a sectional view showing a stopper having a separator hole. d) is a sectional view showing a stopper having a water permeation hole.

FIG. 4 is a cross-sectional view showing a usage state.

[Explanation of symbols]

1 ... Concrete formwork, 2 ... Dam plate, 3 ... Rib, 4 ... Hole,
4a ... Large-diameter hole portion, 4b ... small-diameter hole portion, 5 ... groove, 6a, 6
b, 6c, 6d ... Plug, 7a ... Large diameter hole portion, 7b ... Small diameter plug portion, 7c ... Ridge, 8 ... Separator hole, 9 ... Water permeation hole,
10 ... Water-permeable sheet, 11 ... Separator, 12 ... Standing flap,
13 ... Side flap, 14 ... Rib washer, 15 ... Nut, 16 ...
concrete.

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[Procedure amendment]

[Submission date] July 1, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

3 (a) is a solid plug and a solid, and cross-sectional view showing a transparent plug, (b) is a sectional view showing a plug having a hole for the separator, having (c) is a hole for water permeability It is sectional drawing which shows a stopper.

Claims (3)

[Claims] 1. A weir plate 2 is preliminarily provided with a large number of holes 4, and a solid plug 6a as a plug for closing each hole 4 and a separator 1 are provided.
A concrete formwork using a plug 6c having a separator hole 8 into which 1 is inserted. 2. A plurality of holes 4 are provided in advance in the dam plate 2, a solid plug 6a is used as a plug for closing each hole 4, and a separator 1 is provided.
A concrete formwork using a plug 6c having a separator hole 8 through which 1 is inserted and a plug 6d having a water permeation hole 9. 3. A weir plate 2 is provided with a large number of holes 4 in advance, and a solid plug 6a as a plug for closing each hole 4 and a separator 1 are provided.
1. A concrete formwork using a plug 6c having a separator hole 8 through which 1 is inserted and a solid and transparent plug 6b.