JP2507776Y2 - Water stop plate for concrete splicing formwork - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a water stop plate for a concrete splicing formwork.

"Problems to be solved by conventional techniques and devices" In the conventional concrete connecting formwork that does not require demolding, which is used in concrete connecting work, it can be used as a net stop material such as expanded metal or steel net. A rod-shaped waterproof material is attached (Japanese Patent Laid-Open No. 62-291367, Japanese Utility Model Publication No. 2-
No. 23654, Japanese Utility Model Publication No. 1-157846).

However, the mortar that leaks from the mesh covers the rod-shaped water blocking material on the other side, and if this is left unattended, a slight gap is created in the part, and the water blocking performance decreases, so it is necessary to wipe it off quickly. This wiping takes a lot of work.

In this regard, a steel plate may be partially welded to the net-shaped stopping member, a rod-shaped water blocking member may be attached to the center of the steel plate, and a sluice bar having an appropriate width may be provided on both sides of the rod-shaped water blocking member. Although it is considered, it is still not enough, such as it is effective when used on walls, but invalid when used on foundation boards.

By the way, the thickness of the net-shaped stopper is usually 0.
6 mm to 1.5 mm is used, but if it is thin, it easily deforms during transportation and installation, and the rod-shaped waterproof material is easily peeled off, and
When precast concrete is poured, it is reinforced with a deformation preventive reinforcement material, but the non-reinforced part swells greatly to the postcasting side due to the pressure of the cast concrete, and as a result, the edge part attracted to this and the concrete is turned up. In some cases, it may not be able to function as a piecing formwork, and it has been considered to form reinforcing ribs on the net-shaped stabbing material to prevent deformation (Japanese Utility Model Laid-Open No. 1-157846, Japanese Patent Publication No. (Kaisho 64-83767), even if reinforcing ribs are formed on the net-shaped stopping material itself, a sufficient reinforcing effect cannot be obtained, and it may swell toward the trailing side, which is not enough. . Also, if it is thick,
There are obstacles such as poor handling during transportation and installation.

The present invention is intended to solve such a problem.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a plurality of tall ribs 2 arranged at appropriate intervals on one side or both sides of a constant steel plate 1 provided for connecting to a net-shaped stopper. A plurality of small through holes 3 are arranged in a row between the ribs in parallel with the ribs, and an expansive water blocking material 4 is watertightly attached and fixed to one or both surfaces of the small through hole row. Is characterized by.

[Operation] With the above-described configuration, in use, a net-shaped stop material 5 such as expanded metal or steel net is welded and connected to one side or both sides of the steel plate 1, and this is used as a concrete joint form A. You can use it. At that time, the rib 2 is projected to the trailing side, and the deformation preventing reinforcing member 6 is combined with the rib to reinforce.

When the net-shaped punching material 5 is joined, ribs may be appropriately provided on the net-shaped punching-out material, and the ribs may be joined together.

The rib 2 during the casting of the precast concrete C maintains the rigidity of the concrete jointing form A in cooperation with the reinforcing material 6, and at the same time, with respect to the mortar leaking from the mesh of the net-shaped stopping material 5, It acts like a bank or eaves and prevents the mortar from adhering to the expansive water blocking material 4.

After the precast concrete C is cast, the postcast concrete is similarly cast, but the concrete jointing form A is buried as it is. The expansive water-stopping material 4 thus embedded expands when it contains water, and closes the minute gaps between it and the cast concrete.
Make sure to stop the water.

[Examples] The drawings show examples of the present invention.

In the illustrated example, two ribs 2 having a U-shaped cross section and having a height of 15 to 20 mm are juxtaposed on one surface of a steel plate V having a thickness of 0.6 mm and having an appropriate interval, and a large number of ribs 2 are provided in the center between both ribs. The small through holes 3 are arranged in a row, and the expandable water blocking material 4 is watertightly attached and fixed to both surfaces of the small through holes 3.

The expansive waterproof material 4 has a width of 10 to 15 mm and a rectangular cross section whose height is equal to or less than the height of the rib 2 and is adhered to the steel plate 1 from both sides with an appropriate adhesive agent.

The expandable water blocking material 4 expands when it contains water, and its raw materials include the following.

Water-swellable urethane resin, mixture of water-swellable urethane resin and rubber, mixture of water-swellable 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 non-crosslinked polyvinyl alcohol, crosslinked or noncrosslinked polyacrylic acid salt, polyvinyl alcohol / acid anhydride copolymer Examples thereof include coalesce, starch / acrylic acid graft copolymer, and a mixture of these polymers and 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.). It is particularly preferable from the viewpoint of water stoppage.

The expandable water blocking member 4 may be provided in a plurality of lines between the ribs or may be provided only on one side.

Then, as shown in FIG. 3 and FIG. 4, for example, a net-shaped stop material 5 such as expanded metal or steel net is welded to both sides of the steel plate 1 to form a concrete joint form A. To do. As shown by the chain double-dashed line in FIG. 4, ribs may be provided on the net-shaped stopper 5, and the ribs may be connected to each other.

This concrete jointing form A is erected at a proper position in the concrete form B so as to traverse the space and with the ribs 2 facing the rear striking side.
And the net-shaped stop material 5 is reinforced by the reinforcement material 6 and is used as a buried form for splicing. At the time of this splicing, the precast concrete C slightly protrudes from the mesh of the net-shaped stop material 5 to make the splicing surface uneven, so that there is no need for roughening. D is a reinforcing bar.

Although FIG. 3 and FIG. 4 show the jointing of walls, the concrete jointing form A is horizontally
If it is turned 90 degrees, it can be used as it is as a foundation board.

[Advantage of the Invention] According to the present invention, a plurality of tall ribs 2 are provided on one or both sides of a steel plate 1 provided for connecting to a net-shaped stopper.
Since the steel sheets 1 are arranged in parallel, the rigidity can be remarkably increased not only as the steel plate 1 but also as the concrete joining formwork A in which the net-like fastening materials 5 are connected, and the thickness of the net-like fastening material 5 can be reduced. Even as a whole, there is little deformation during transportation and installation, and it is possible to prevent exfoliation of the expansive waterproof material 4 that occurs due to deformation, and to prevent bulging deformation during casting of the precast concrete C and the curling of the edge portion due to this. It can be properly prevented, and the overall weight can be lightened, and the handling during work can be improved.

Moreover, since the expansive water blocking material 4 is fixed between the tall ribs 2, the rib 2 acts like a bank or an eaves,
The mortar that leaks from the mesh of the continuous net-like stopping material 5 is prevented from adhering to the expansive water-stopping material 4, and therefore leaks from the mesh regardless of whether it is used for splicing a wall or splicing a foundation board. Since the mortar does not cover the expansive water blocking material 4, a troublesome wiping is not required, and the number of wiping operations can be reduced.

Further, since the ribs 2 have a large rigidity as a whole, the amount of the reinforcing material 6 for preventing deformation at the time of placing concrete can be small, the construction time can be shortened, and the cost can be reduced. Further, by providing the ribs also in the continuous net-shaped stopper 5, the ribs can be easily connected to each other and the joining work can be facilitated.

In addition, since the expansive water blocking material 4 is watertightly fixed by the row of small through holes of the large number of small through holes 3, it does not easily peel off, and the ribs 2 do not easily separate even when the deformation preventing reinforcement member 6 is attached. Because it is mechanically protected by, there is little damage and it is useful in practical use.

[Brief description of drawings]

1 is a perspective view, FIG. 2 is a perspective view of essential parts, FIG. 3 is a cutaway perspective view of a state of use, and FIG. 4 is an essential part of the present invention. It is an enlarged plan view. DESCRIPTION OF SYMBOLS 1 ... Steel plate, 2 ... Rib 3 ... Small through-hole, 4 ... Intumescent water stopping material 5 ... Net stop material, 6 ... Reinforcing material A ... Concrete joint form B ... Concrete form C ... Precast concrete D … Reinforcing bars

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiko Yoshioka 3-1-8 Mokudo, Mihara-cho, Minamikawachi-gun, Osaka Prefecture Takenaka Corporation Technical Research Institute Co., Ltd. Osaka branch (72) Inventor Yoshio Okumura Shinagawa-ku, Tokyo Higashi Oi 6-4-6 (72) Inventor Takuo Fukushima 7-29-2 Katsutadai, Yachiyo-shi, Chiba (72) Inventor Yasumasa Hayashida 3-9-2 Nakatsuma, Ageo-shi, Saitama (72) Inventor Seigo Morita Tokyo 5-7-11 Ueno, Taito-ku, Tokyo (56) Reference JP 62-291367 (JP, A) JP 1-83767 (JP, A) Actually open 2-23654 (JP, U) Actually open Flat 1-157846 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of tall ribs 2 are juxtaposed at appropriate intervals on one or both sides of a steel plate 1 provided for connecting to a net-shaped stopper, and the ribs are arranged in parallel between these ribs. A water blocking plate for a concrete splicing form, characterized in that a large number of small through holes 3 are arranged in a row, and an expansive water blocking material 4 is watertightly attached and fixed to one side or both sides of the row of small through holes.