JPH0439907Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a waterway in which the joint end faces of a plurality of U-shaped groove blocks for waterways are sealed with a sealing member interposed between them. This invention relates to a joint sealing device for a U-shaped groove block.

(Prior Art) A device for sealing joints of U-shaped groove blocks for waterways, which seals the joint end faces of a plurality of U-shaped groove blocks for waterways forming a waterway with a sealing member interposed between them. Generally, a U-shaped sealing rubber plate made of silicone rubber, urethane rubber, etc. is used to completely cover the joint end surface.

(Problem that the invention aims to solve) However, the U-shaped sealing rubber plate made of silicone rubber or urethane rubber that completely covers the joint end surface is expensive because it uses a large amount of rubber, and the U-shaped sealing rubber plate In order for the sealing effect to be achieved, the U-shaped groove blocks for waterways must be laid against each other so that the U-shaped seal rubber plates are sufficiently crushed between the opposing U-shaped groove blocks for waterways, which requires a lot of work. Further, since the side surfaces of the U-shaped seal rubber plate are exposed to the outside, they have various problems such as being susceptible to aging.

(Means for Solving the Problems) The joint sealing device for U-shaped groove blocks for waterways of the present invention, which attempts to solve the above-mentioned problems, seals the joint end faces of a plurality of U-shaped groove blocks for waterways forming a waterway. In a joint sealing device for a plurality of U-shaped groove blocks for a waterway, the connecting end surfaces of a plurality of U-shaped groove blocks for a waterway are interposed between each other. In a joint sealing device for a U-shaped groove block for a waterway, the upper end is located below the upper end surface of the U-shaped groove block for a waterway. A U-shaped cavity is formed by the opposing U-shaped grooves, and a sealing member made of water-expandable rubber that expands due to water absorption is sealed in the U-shaped cavity. and the U-shaped waterway U facing each other with a sealing member expanded by water absorption in the U-shaped cavity.
This feature is characterized in that the joint end surfaces of the groove block are sealed.

(Embodiments) Next, the present invention will be described in detail with reference to illustrated embodiments.

Reference numerals 1a and 1b are U-shaped groove blocks for water channels that form water channels, and U-shaped grooves 3a and 3b for intervening sealing members are provided at the upper ends 4 of the joint end surfaces 2a and 2b.
a, 4b are formed so as to be located below the upper end surfaces of the U-shaped groove blocks 1a, 1b. Note that the cross-sectional shape of the U-shaped grooves 3a and 3b is not particularly limited, and may be semicircular, square, triangular, or the like. Reference numeral 5 denotes a rod-shaped sealing member made of water-expandable rubber (for example, Adeka Ultra Seal, trade name) that expands upon absorption of water, and the sealing member 5 is formed on the joint end surface 2a of one U-shaped groove block 1a for waterways. Approximately half of the U-shaped groove block 1b is fitted and temporarily held in the U-shaped groove 3a, and the other U-shaped groove block 1b is attached to its joint end surface 2.
U-shaped grooves 3a and 3b are provided on the opposing joint end surfaces 2a and 2b, and are laid in abutting manner so that about half of the remaining seal member 4 is fitted into the U-shaped groove 3b formed in b. It is sealed in the U-shaped cavity 3 formed by The rod-shaped sealing member 5 sealed in this U-shaped cavity 3 is connected to the joining end surfaces 2a and 2.
It absorbs moisture that enters through the gap between b and expands within the U-shaped cavity 3, and exhibits a complete water-stopping effect due to its double locking function. Note that a U-shaped groove block for waterways may be used in which the sealing member 5 is fitted and held in the U-shaped groove 3a in advance, but in this case, it is necessary to prevent the sealing member 5 from absorbing water during transportation and storage. Therefore, the above construction method in which the seal member 5 is fitted and temporarily held in the U-shaped groove 3a at the waterway construction site is preferable.

With this structure, the opposing joint end surfaces 2a and 2b of the U-shaped groove blocks 1a and 1b forming the waterway are sealed with a sealing member 5 interposed between them, thereby achieving a water-stopping effect. The performance is similar to that of the conventional joint sealing device of this type of U-shaped groove block for waterways, but the sealing member 5 of the present invention is not a mere rubber sealing material but a rod-shaped member made of water-expandable rubber that expands due to water absorption. In addition, this sealing member 5 has opposing joining end surfaces 2a,
2b is sealed in a U-shaped cavity 3 formed with U-shaped grooves 3a and 3b, and expands by absorbing water that enters from the outside, and is simply inserted with a conventional sealing member. It exhibits a far superior sealing effect and can completely stop water. Moreover, since the seal member 5 is not exposed to the outside, there is less aging. Furthermore, the seal member 5 completely covers the joint end surfaces 2a and 2b. Since the amount of rubber that can be filled into the U-shaped cavity 3 formed by the narrow U-shaped grooves 3a and 3b is sufficient, the amount of rubber used is small and the sealing effect is sufficiently exerted, making it possible to reduce costs. Become.

(Effect of the invention) As is clear from the above description, the present invention has U-shaped grooves for intervening sealing members on the joint end faces of a plurality of U-shaped groove blocks for waterways forming a waterway. U consisting of opposing U-shaped grooves formed so as to be located below the upper end surface of the groove block.
A sealing member made of water-expandable rubber that expands due to water absorption is inserted into this U-shaped cavity to form a U-shaped cavity, and the joint end surface is completely sealed with the sealing member expanded by water absorption within the U-shaped cavity. Since the upper end of the U-shaped groove does not reach the upper end surface of the U-shaped groove block for waterways, there is no place for the expanding sealing member to escape, and the sealing effect is particularly excellent.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view of the same main part, and FIG. 3 is a partially cutaway perspective view showing an exploded state. 1a, 1b... U-shaped groove block for waterway, 2a,
2b...Joining end surface, 3...U-shaped empty chamber, 3a, 3
b...U-shaped groove, 4a, 4b...upper end, 5...rod-shaped sealing member made of water-expandable rubber.

Claims (1)

[Scope of utility model registration request] In a joint sealing device for a U-shaped groove block for a waterway, the joint end faces of a plurality of U-shaped groove blocks for a waterway are sealed with a sealing member interposed between them. U-shaped grooves for intervening sealing members are provided on the joint end surfaces of the blocks, the upper ends of which are located below the upper end surface of the U-shaped groove blocks, and the opposing U-shaped grooves form a U-shaped cavity. A sealing member made of water-expandable rubber that expands due to water absorption is enclosed in the U-shaped cavity, and the joint end surfaces of the opposing U-shaped groove blocks for waterways are sealed using the sealing member that expands due to water absorption in the U-shaped cavity. A joint sealing device for a U-shaped groove block for waterways.