JPH0726506Y2 - Concrete splicing formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a concrete jointing formwork.

“Problems to be Solved by Conventional Techniques and Inventions” Conventionally, concrete jointing formwork that does not require demolding has been used for jointing construction in concrete structures.

This kind of concrete splicing formwork these days is made by adhering a rod-shaped waterproofing material to the proper place of a net-shaped stopping material.
It is manufactured at a factory in advance according to the shape of the jointing point at the construction site, carried into the construction site, built, and used as a formwork for burying. Then, the rod-shaped water stop material stops the splice joint.

However, this splicing formwork with waterproofing material is extremely bulky for transportation because the waterproofing material protrudes on both sides at the middle part of the sealing material, and in the best sense, most of it is air transportation. It has the disadvantages of poor transportation efficiency and high transportation costs. Of course, it is possible to attach the waterproofing material directly to the required net-shaped stopping material at the construction site by gluing it, but at the construction site, it is difficult to perform precise and accurate gluing, so it is appropriate. The quality cannot be maintained uniformly, and there is a risk that the water-stopping performance will be deteriorated. On the other hand, if a precise and accurate adhesion is attempted, the construction period will be delayed. Therefore, installation of waterproofing material at the construction site should be avoided.

In addition, when the design is changed, there is a drawback that it needs to be modified at the construction site, which is not easy.

The present invention seeks to eliminate such conventional drawbacks.

[Means for Solving the Problem] In order to achieve the above object, the device according to claim 1 has rod-shaped expansive waterproof rubbers 2 and 3 attached to both front and back surfaces of a belt-shaped support member 1,
Both side edges of the support material 1 are linked to a net-shaped stopper material 4.

Further, the invention of claim 2 is the structure of claim 1 described above, in which a slag guard 15 is provided at an appropriate position of the support material 1.

Because of the above-mentioned constitution in "action", in both cases of claim 1 and claim 2, the support material 1 to which the rod-shaped expansive waterproof rubbers 2, 3 are attached
Then, the net-shaped stopping material 4 may be produced at the factory and individually carried to the construction site, and may be joined and built in at the construction site.

Therefore, in the case of claim 2, the support member 1 is further protected against slag 15
Prevents the mortar from leaking along with the pouring of the precast concrete C and prevents the mortar from adhering to the expansive waterproof rubber 3 on the other side.

“Example” First Example As shown in FIGS. 1 and 2, stick-shaped expansive waterproof rubbers 2 and 3 are adhered to both front and back surfaces of a strip-shaped support material 1 made of a flat steel plate 11 to support it. Both side edges of the material are joined to the stop materials 4, 4 such as expanded metal or steel net to form a joint form A.

The piecing form A is erected at a proper position in the concrete form B so as to cross the space, and is used as a burying form for piecing. At the time of this splicing, precast concrete C
Does not need to be roughened because it slightly swells out from the mesh of the stop members 4 and 4 and the connecting surface becomes uneven. D is a reinforcing bar.

It should be noted that FIG. 1 relates to jointing of walls, and therefore the expansive waterproof rubbers 2 and 3 are in the vertical direction. In the case of splicing the foundation, the expansive waterproof rubbers 2 and 3 are horizontal.

Second Example As shown in FIG. 3 in the above first example, both side edges of the strip-shaped support member 1 made of the steel plate 11 are formed as the engaging edges 12 and 12, and the joining edges of the stop members 4 and 4 are also the same. Are formed on the engaging edges 41, 41 corresponding to, and are engaged with each other.

Third Example As shown in FIG. 4 in the above first example, the strip-shaped support material 1 is a net-shaped member 13 such as expanded metal or steel net, and a rib 14 is formed in the longitudinal direction at the center thereof. Become.

Fourth Example As shown in FIG. 5, in the above third example, both side edges of the belt-shaped support member 1 made of the net-shaped member 13 are formed as the engaging edges 12,12, and the joining edges of the stop members 4,4 are formed. The corresponding engaging edge 41,
41 and are engaged with each other.

Fifth Example As shown in FIG. 6 in the first example, a rib 14 is formed in the longitudinal direction at the center of the strip-shaped support member 1 made of steel plate 11, and in the vicinity of both engaging edges 12, 12. , It is formed by forming ridges 15 and 15 by ridges.

In addition, this FIG. 6 has shown the case where it applies to a wall.
When this is applied to the basis, it becomes as shown in FIG.

Sixth Example As shown in FIG. 7, in the fifth example, the net-shaped stopping material 4 is integrally connected to one side portion of the belt-shaped support material 1 without providing an engaging edge or a slag guard. Consists of

In this case, it will be used exclusively for the foundation, and when installing it, the scepter will be positioned above.

By the way, the expansive waterproof rubber in each of the above examples 2, 3
Swells when it contains water, and its raw materials are as follows.

Water-swelling urethane resin, mixture of water-swelling urethane resin and rubber, mixture of water-swelling urethane resin and rubber and hydraulic material (hydraulic cement, gypsum, etc.), olefin / maleic acid copolymer, polyvinyl alcohol / isobutylene / Maleic acid copolymer, polyvinyl alcohol / acrylic acid copolymer, crosslinked or crosslinked polyvinyl alcohol, crosslinked or non-crosslinked polypolyvinyl alcohol, crosslinked or crosslinked polyvinyl alcohol crosslinked or noncrosslinked polyacrylic acid salt, polyvinyl alcohol / acid anhydride Examples thereof include copolymers, starch / acrylic acid graft copolymers, and mixtures of these polymers with rubber. Among the above, it is preferable to use a flexible water-swelling urethane resin, a mixture of water-swelling urethane resin and rubber, a mixture of water-swelling urethane resin and rubber and a hydraulic substance (hydraulic cement, gypsum, etc.). Particularly preferred from the viewpoint of water stoppage.

"Effect of the Invention" According to the inventions of claims 1 and 2, the expansive water-stop rubber
The support material 1 provided with 2, 3 and the net-shaped stopper material 4 can be individually factory-manufactured and can be individually brought into the construction site, therefore, the handling is good and the production is easy, and Further, the transportation is not bulky, the transportation efficiency can be improved, and the transportation cost can be reduced. Of course, since the expansive waterproof rubbers 2 and 3 are attached to the support material 1 at the factory, precise and accurate waterproof performance can be secured, high quality can be maintained uniformly, and waterproof material can be used at the construction site. There is no reduction in water-stopping performance or delay in the construction period as in the case of directly attaching to the stop material.

In addition, the support material 1 provided with expansive waterproof rubbers 2 and 3 and the net-shaped stop material 4 may be joined at the construction site in accordance with the shape of the splicing point, and the response at the construction site is flexible. Therefore, design changes can be easily accommodated.

According to the invention of claim 2, since the support material 1 provided with the expansive water-stop rubbers 2 and 3 is further provided with the slag protector 15, when the precast concrete C is poured, the expansive water-stop on the other side is placed. It is possible to prevent the mortar from leaking through the rubber 3, and it is possible to prevent a decrease in the water blocking effect due to the adhesion of the leaked mortar. Therefore, it is not necessary to wipe off the adhered mortar.

[Brief description of drawings]

1 is a cutaway perspective view of the first example, FIG. 2 is an enlarged cutaway plan view of an essential part of the same example, and FIG. 3 is an essential part of the second example. FIG. 4 is an enlarged sectional plan view of an essential part of the third example, FIG. 5 is an enlarged sectional plan view of an essential part of the fourth example, and FIG. 6 is a sectional plan view of the fifth example. Figure and Figure 7
FIG. 8 is a cross sectional plan view of the sixth example, and FIG. 8 is a cross sectional plan view showing another usage mode of the fifth example. A ... Pourting form, B ... Concrete form C ... Precast concrete, D ... Reinforcing bar 1 ... Supporting material, 2,3 ... Expandable waterproof rubber 4 ... Stopping material, 11 ... … Steel plate 12 …… Engagement edge, 13 …… Net-shaped member 14 …… Rib, 15 …… Except for slag 41 …… Engagement edge

Front page continuation (72) Creator Takuo Fukushima 7-29-2 Katsutadai, Yachiyo-shi, Chiba (72) Creator Yasushi Hayashida 3-9-2 Nakatsuma, Ageo-shi, Saitama (56) References: 62-291367 (JP, U) A microfilm (JP, U) which is a photograph of the contents of the specification and drawings attached to the application for JP-A-59-149545 (JP-A-61-65154)

Claims (2)

[Scope of utility model registration request] 1. A concrete comprising rod-shaped expansive waterproof rubbers 2, 3 attached to both front and back surfaces of a belt-shaped support member 1, and both side edges of the support member 1 linked to a net-shaped stop member 4. Punching formwork. 2. A strip-shaped support material 1 is provided with rod-shaped expansive water-stopping rubbers 2, 3 on both front and back surfaces, and both side edges of the support material 1 are linked to a net-shaped stop material 4, and A concrete splicing formwork in which a scepter 15 is provided at an appropriate position on the support material 1.