JPH06322845A - Water stop connector - Google Patents

Abstract

PURPOSE: To prevent leakage of water from occurring at a joint interconnection part by forming an open end and constituting. CONSTITUTION: A concrete wall 11 is provided with an expandable joint interconnection 12 and water stop plates 13, 14 of a water-swellable polyurethane elastomer is fixed on an upper face of the wall 11. A flexible polyvinyl chloride water stop plate 15 having four valve-like ribs 16 and a center smooth top box 17, providing a locator for supporting a joint filling material in the joint in response to variation, is installed vertically rearward of the wall 11. Water stop plate connectors 19, 20, made of the flexible water swellable urethane elastomer, are connected to the water stop plates 15 by sandwiching the ribs 16 between inner side faces comprising pawls 3, 4 and a notch. Closed ends 21, 22 of the connectors 19, 20 are connected through adhesion-bonding by the water stop plates 13, 14. The connectors 19, 20 swells with absorption of water and constitutes waterproof seal around the ribs 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stop plate connector for connecting a water stop plate made of a non-water swellable material such as soft vinyl chloride and a water stop plate made of a water swellable material.

[0002]

Water stop plates are used in joints of concrete structures to prevent the passage of water. In the early days, the water stop plate was made of iron or copper cords, and in the case of copper, it was sometimes pleated to give it flexibility. A composite of rubber and mild steel plate protruding from the rubber was also used. Flexibility with two or more key ribs extended along the tape to wedge the tape into the concrete on both sides of the joint to be recently sealed and protruding from the tape Tape-shaped products made of waterproof material have been used. Such waterproof plates are usually made of rubber or plastic materials, and the most widely used at present is soft PVC. More recently, hydrophilic or water-swellable water stop plates have been commercialized and used. These water stop plates utilize the expansion ability of the material upon contact with water to prevent the passage of water at joints or discontinuities in concrete structures. Examples of the material used for the water-swellable water blocking plate include water-swellable polyurethane elastomer, a mixture of butyl rubber and bentonite soda, and rubber containing a water-absorbent resin.

[0003]

Since the speed and magnitude of joint fluctuation of the structure exceed the performance of the water-swellable or hydrophilic material, the water-swellable or hydrophilic water stop plate is used for the concrete wall or floor structure. It is not suitable for use in expansion joints. Even when a water swellable or hydrophilic material is mainly used as the water blocking plate, it is necessary to use a non-water swellable material such as soft vinyl chloride or rubber for the expansion joint. When a water-swellable or hydrophilic water-stop plate and a non-water-swellable water stop plate are used at appropriate locations and used together, the current situation is that water leakage from the joints cannot be prevented. And it is therefore essential to provide some way of connecting the two types of water stop plates to prevent water leakage at the joint connections.

[0004]

As a result of intensive studies to solve the above problems, the present inventors have found that water leakage can be prevented by using a specific connector for a joint connecting portion. That is, it is a connector for connecting a water-swellable or hydrophilic water-stop plate and a non-water-swellable water stop plate which has a specific shape and is made of a water-swellable material.

There are two types of water stop plates made of a non-water swellable material such as rubber or soft vinyl chloride. One is called an external water stop plate having a protrusion such as a rib on only one side of the water stop plate or a rear installed water stop plate. The other is called an internal water stop plate or a centrally installed water stop plate that has protrusions such as ribs on the upper and lower surfaces of the water stop plate. The present invention relates to connectors for both external or rear waterstops and internal or central waterstops.

An object of the present invention is to provide a connector for connecting two types of water blocking plates, one of which is made of a non-water swellable material and the other of which is made of a water swellable material, the connector having an open end. The present invention also provides a water-stop plate connector, which is made of a flexible water-expandable material composed of a claw portion and a curved portion that sandwich a rib of a water-stop plate made of a non-water-expandable material.

As an indispensable constitution of the waterproof connector of the present invention, the inner side surface is composed of a claw portion which is a flat surface or a substantially convex curved surface, a notch portion adjacent to the claw portion, and the notch. A curved portion that is adjacent to the portion and that increases the opening ability of the claw portion is provided.

As a preferred construction of the water blocking plate connector of the present invention, the inner side surface comprises a claw portion which is a flat surface or a substantially convex curved surface, a portion formed by a notch adjacent to the claw portion, and the notch. An example is a part having four flat inner side surfaces adjacent to the part, and four continuous parts each having a curved part adjacent to the part having the flat surface.

The preferred embodiment of the connector of the present invention is suitable for connection to both external or rear waterstops and internal or central waterstops. Waterstops typically have a flange at each end of the waterstop to prevent tearing when secured to concrete with a hammered nail that passes through the waterstop just inside the flange. In the case of an externally installed water stop plate, as shown in Fig. 3,
The inner side surface of the portion formed by the claw portion and the notch of the water blocking plate connector can be used so as to contact the rib of the water blocking plate and sandwich the rib. On the other hand, in the case of the internal water stop plate, as shown in FIG. 4, the inner side surfaces of all parts of the water stop plate connector are in contact with the two ribs on the surface facing the flange end of the water stop plate. It can be used to sandwich the flange end and the two ribs.

The inner side surface of the claw portion of the water blocking plate connector in the present invention may be a flat surface or a convex curved surface, but a convex curved surface is preferable. When the inner side of the pawl is flat, its two surfaces may be parallel to each other or the gap between them may widen towards the open end of the waterstop connector.

The inner side surface of the notch portion of the water blocking plate connector may be V-shaped or substantially U-shaped.

The notch portion of the water stop plate connector and the portion having a flat inner side surface between the curved portion are preferably located parallel to each other.

The inner side surface of the curved portion of the water blocking plate connector is a curved curved surface, preferably an arcuate curved surface.

Examples of the water-swellable material used for making the water blocking plate connector include, for example, rubber containing a water-absorbent resin, flexible plastic, or water-swellable polyurethane elastomer. Examples of the water absorbent resin include acrylic acid-based resins such as sodium polyacrylate, carboxymethyl cellulose, polyethylene glycol modified products (urethane modified, epoxy modified, etc.), bentonite soda and the like. Examples of the rubber that serves as the matrix and the flexible plastic include natural rubber, butyl rubber, chloroprene rubber, styrene-butadiene copolymer rubber, and soft vinyl chloride. When a water-swellable polyurethane elastomer is used as a water-swellable material, it is not necessary to use a water-absorbing resin. For example, an aliphatic or alicyclic polyisocyanate is used as an isocyanate, and the presence of a hydrophilic segment (for example, an oxyethylene group) in the chemical structure. As a result, a polyurethane elastomer exhibiting water swelling property can be used. Such a polyurethane elastomer exhibits a stable coefficient of water expansion even in water containing metal ions, and since the rate does not decrease even after long-term immersion, it exhibits an excellent water blocking effect. Examples of such a polyurethane elastomer include Aquaprene (manufactured by Sanyo Chemical Industries). Among such water-swellable polyurethane elastomers, those having a water expansion coefficient of 1.2 to 2.5 times are preferable.

The water-stop plate connector made of a flexible water-expandable material has an elastic steel wire in order to enhance the performance of sandwiching the ribs of the connector when connecting with the water-stop plate made of a non-water-expandable material. You may embed it. Or similar effect,
It is also achieved by forming the tape-like article as a laminate of two water-swellable materials, one of which is harder than the other.

When the connector of the present invention is installed, the claw portion is connected to the non-water-swellable material, while the sealing end of the connector opposite to the claw portion is sealed with a water-swellable material by an adhesive. Can be connected to. And the connector can be fixed to the concrete with nails or glue. When the connector comes into contact with water, it swells due to water absorption, forming a waterproof seal around the ribs.

[0017]

Embodiments will be described in more detail below with reference to the examples of FIGS. FIG. 1 is a plan view of a water stop plate connector showing an embodiment of the present invention, and FIG. 2 is a schematic view of a cross section of the water stop plate connector of FIG. FIG. 3 is a typical example of a concrete wall expansion joint joint showing an example of use of the water blocking plate connector of FIGS. 1 and 2 in which a water blocking plate made of water-expandable polyurethane is connected to a soft PVC water blocking plate installed at a rear portion. FIG. 4 is a typical view of an expansion joint of a concrete wall showing an example of use of the water stop plate connector of FIGS. 1 and 2 in which a water-swellable water stop plate is connected to a PVC water stop plate.

1 and 2, the water stop plate connector 1
Is made of a flexible water-swellable urethane elastomer having claw portions 3 and 4 forming the open end 2 and a portion 5 formed of a curved portion. The inner side surface 6 has a convex curved surface 7 for the claw portion, a U-shaped curved surface 8 for the notch portion, a flat surface 9 for the portion between the notch portion and the curved portion, and an arc-shaped portion for the curved portion. The curved surface 10.

In FIG. 3, a concrete wall 11 has expansion joints 12 filled with a closed-cell filling joint material which is leak-proof with an elastic sealant. The two parts of the water-swellable polyurethane elastomeric waterstops 13, 14 are on opposite sides of each joint 12 and are located on the upper surface of the wall 11,
It is fixed by adhesive bonding or nailing. Four valve-shaped ribs 16, a central smooth top box 1 that adapts to variations at joints and provides positioning for supporting joint filler.
7. The soft PVC water blocking plate 15 with the end flange 18 is the wall 1
Located vertically behind 1. Fig. 1 and FIG. The two water stop plate connectors 19 and 20 of the type shown in FIG. 2 are located on the upper surface of the wall 11, and the side surfaces on the inner side of the portions formed by the claws and notches allow the valve-shaped ribs 16 of the PVC water stop plate 15.
, And is connected to the water stop plate 15. On the other hand, the sealed ends 21 and 22 of the water stop plate connectors 19 and 20 are the water stop plates 13 and 1, respectively.
4 by adhesive bonding.

In FIG. 4, the soft PVC water blocking plate 23 is placed in the center of the concrete wall 25 through the expansion joint 24 which is filled with the closed filling joint material which is leak-proof with the elastic sealant. The water stop plate 23 has a hexagonal central valve 26, a terminal flange 27 and four ribs 28 on a surface 29 on the water stop plate 23. A water stop plate connector 30, 31 of the type illustrated in FIGS. 1 and 2 is located on the wall 25 and has end flanges 27 and ribs 28 sandwiched on all its inner sides.
It is connected to the water stop plate 23. On the other hand, the closed ends 32, 33 of the water stop plate connector are connected to the ends 34, 35 of the water stop plate of water-swellable polyurethane elastomer by adhesive bonding.

[0021]

When the water-swellable water-stop plate and the non-expandable water-stop plate are connected using the water-stop plate connector of the present invention, leakage of water can be significantly reduced including the connecting points.

[Brief description of drawings]

FIG. 1 is a plan view of a water stop plate connector according to the present invention.

FIG. 2 is a schematic view of a cross section of a water blocking plate connector according to the present invention.

FIG. 3 is an embodiment of a water-stop plate connector of the present invention in which a water-stop plate made of water-swellable polyurethane and a soft PVC water-stop plate installed at the rear are connected.

FIG. 4 is an embodiment of a water-stop plate connector of the present invention in which a water-stop plate made of water-expandable polyurethane and a soft PVC water-stop plate installed in the center are connected.

[Explanation of symbols]

1 Water stop plate connector 2 Open end 3, 4 Water stop plate connector claws 5 Water stop plate connector curved portion 6 Inner side surface of water stop plate connector 7 Claw convex curved surface 8 U-shaped part consisting of notches Curved surface 9 Plane of a portion between a portion formed by a notch and a curved portion 10 Arc-shaped curved surface of the curved portion 11 Concrete wall 12 Expansion joints 13, 14 Water-swellable polyurethane elastomer water stop plate 15 Soft PVC water stop plate 16 Valve-shaped rib of soft PVC water stop plate 17 Central smooth top box of soft PVC water stop plate 18 End flange of soft PVC water stop plate 19, 20 Water stop plate connector 21, 22 Sealed end of water stop plate connector 23 Soft PVC Water stop plate 24 Expansion joint 25 Concrete wall 26 Central valve of soft PVC water stop plate 27 End flange of soft PVC water stop plate 28 Rib of soft PVC water stop plate 29 Soft Surface of PVC water blocking plate 30, 31 Water blocking plate connector 32, 33 Sealed end of water blocking plate connector 34, 35 Water blocking end of water-swellable polyurethane elastomer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ian Giems Moffat, UK Buckinghamshire, Gills Shallfonte Street, Elwood Rice, 21 (72) Inventor Yutaka Kawahara 11-1 No. 1 Hitotsubashi-honcho, Higashiyama-ku, Kyoto Sanyo Kasei Industry Co., Ltd.

Claims (12)

[Claims] 1. A water stop plate connector for connecting two kinds of water stop plates, one of which is made of a non-water-swellable material and the other of which is made of a water-swellable material, the connector having an open end. A water-stop board connector comprising a flexible water-swellable material composed of a claw portion and a curved portion that sandwich a rib of a water-stop plate made of a non-water-expandable material. 2. The water stop plate according to claim 1, wherein the watertight plate is composed of a claw portion having a flat inner side surface, a portion including a notch adjacent to the claw portion, and a curved portion adjacent to the portion including the notch. connector. 3. The stop according to claim 1, wherein the inner side surface includes a claw portion having a convex curved surface, a notch portion adjacent to the claw portion, and a curved portion adjacent to the notch portion. Water plate connector. 4. The water stop plate connector according to claim 2, further comprising a portion having a flat inner side surface between the notched portion and the curved portion. 5. The water blocking board connector according to claim 2, wherein the inner side surfaces of the claw portions are flat surfaces and are parallel to each other. 6. The inner side surface of the claw portion is a flat surface and extends toward the open end.
Alternatively, the water stop plate connector according to item 4. 7. The water-stop plate connector according to claim 4, wherein the notch portion and the portion having a flat inner side surface provided between the curved portion are parallel to each other. 8. The waterstop plate connector according to claim 1, which is made of rubber or plastic containing a water-absorbent resin. 9. The water stop plate connector according to claim 1, which is made of a polyurethane elastomer having a hydrophilic segment in its chemical structure. 10. The water blocking plate connector according to claim 9, wherein the polyurethane elastomer has a water swelling ratio in water of 1.2 to 2.5 times. 11. The waterstop plate connector according to claim 1, wherein an elastic steel wire is embedded in the waterstop plate connector. 12. The water stop plate connector according to claim 1, which is formed by stacking two kinds of water-swellable materials having different hardnesses.