JPH0340897Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to the joint structure of rubber waterway members.
More specifically, the present invention relates to a joint structure of a rubber water channel member installed in a U-shaped drainage channel formed in open space development, farmland development, or roadside ditch.

(Prior Art) Conventionally, concrete waterways have been continuously laid in drainage channels created when creating vacant land or farmland. In addition, recently, materials made of hard synthetic resin, which are much lighter than concrete waterway members, have been used.

When such waterway members are installed in a drainage channel, each of the waterway members is joined by interposing mortar or applying an adhesive to each end face thereof.

(Problem that the invention aims to solve) However, when conventional concrete or hard synthetic resin waterway members are used in particularly cold regions, the water contained in the surrounding soil that comes into contact with the waterway members freezes and Lifting the channel members by different amounts imparts shear strain to the joints between each member, which can result in premature cracking and failure of the joints of the channel members. In addition, conventional water channel members are rigid bodies with a predetermined shape, and if they do not conform to the groove shape of the drainage channel, it is necessary to re-dig and correct the groove of the drainage channel.

The present invention aims to improve these problems, and has a joint structure using a deformable rubber channel member that can be freely fitted to the groove surface of the drainage channel during construction. An object of the present invention is to provide a joint structure for rubber waterway members that prevents cracks or damage at the joints of waterway members in the ground.

(Means for Solving the Problems) That is, the feature of the present invention is that at the joints of rubber channel members each having a U-shaped cross section, in which a core material made of a plastically deformable metal member is embedded in rubber. , an adhesive layer and a retaining plate are sequentially laminated in a groove formed by abutting a thin stepped portion formed at the end of the water channel member and a stepped portion of another water channel member to form another area. The rubber water channel member has a joint structure in which the area is in the same plane as the area and is mechanically fixed with a tightening material at a substantially constant pitch.

(Function) According to this joint structure of the rubber water channel member, the inner side of the joint part is on the same level as other areas without any difference in level, and the flow of water is improved. Furthermore, since the adhesive layer is interposed in the groove formed by butting each step, water leakage will not occur. Furthermore, even if the joint structure of the rubber waterway member of the present invention is used in drainage canals in cold regions, the joint has relatively high elasticity in three axes, so there is no risk of early breakage due to freezing of water. Hard to happen.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view of a rubber water channel member used in the present invention, and FIG. 2 is a perspective view of a joint portion of the rubber water channel member according to the present invention. is natural rubber, isoprene rubber, chloroprene rubber, or ethylene with good weather resistance.
A core material 3 made of a metal wire mesh or a flat metal plate is embedded in a rubber material 2 made of propyline terpolymer, butyl rubber, or a blend thereof, and has a roughly U-shaped cross section and a length of about 50 to 200 cm. It has a relatively elongated shape. and,
Inside at least one end 5 of the water channel member 1, there is a stepped portion 4 with a reduced wall thickness, which serves as a joint to another water channel member.

As mentioned above, the core material 3 is a metal member made of a metal wire mesh or a metal flat plate, and this member has the function of retaining the shape of the rubber waterway member 1 and at the same time, the function of freely changing the shape of this waterway member 1. is in charge of Therefore, this metal member has a porosity R={a/
(a+d)} ² ×100 (a: opening, d: wire diameter) 30 to 95
Plain weave, twill weave, creep weave, rhombus wire mesh, hexagonal wire mesh, etc. can be used. In addition, the metal flat plate is about 0.02 to 1 mm thick and has a complex number of round and square through holes, and the ratio of through holes is (area of through holes / flat plate area x 100).
is also about 10-70%.

The rubber water channel member 1 having the above configuration has a joint structure as shown in FIGS. 2 and 3.
That is, the step portions 4, 4 provided on the inside of each end portion 5, 5 of the rubber water channel member are butted against each other, and the adhesive layer 7 and the retaining plate 8 are sequentially laminated within the groove portion 6 formed thereby. and is almost flush with the area other than the joint. This joint portion 9 is mechanically fixed with a tightening material 10 at a substantially constant pitch.

Note that the groove portion 6 in the joint member is relatively shallow and the core material 3 is present up to the end portion 5 of the water channel member.
There is no need to particularly reinforce the outside of the joint.

The adhesive layer 7 is composed of a non-vulcanized rubber composition, a naturally vulcanizable rubber composition, or a composition in which a bituminous material such as asphalt is mixed with rubber or a synthetic resin.

Further, as the fastening material 10, screws, bolts, cages, rivets, etc. are used.

As a result, the inner side of the joint portion of the rubber water channel member becomes substantially the same plane without any difference in level, allowing good flow of water and preventing sand from accumulating in this portion. Furthermore, the joining member has a sufficiently reinforced structure and can withstand earth pressure. Furthermore, when installing a rubber waterway member bonded in this way in a drainage channel provided in a vacant lot, etc., even if the size of this waterway member is larger than the drainage channel, the vicinity of the top of the waterway member may be pressed. This also makes it possible to deform the lower corner so that it follows the drainage channel. Also,
Since this channel member has a certain degree of flexibility, it can easily follow the uneven surface of the foundation of the drainage channel and does not require base treatment.

(Effects) As described above, according to the joint structure of the rubber water channel member of the present invention, the inside of the joint is formed on almost the same plane as other areas without any difference in level, so water flow is improved. Not only that, sand and the like will not accumulate, and furthermore, since the adhesive layer is interposed in the groove formed by abutting the stepped portions of the end surfaces of the channel members, there will be no leakage of water. In addition, even if the joint structure of this rubber waterway member is used in drainage channels in cold regions, the joint part has excellent elasticity in three axes, so the stress applied to this part can be sufficiently absorbed, allowing water to absorb moisture. This has an excellent effect of avoiding damage caused by freezing, that is, damage such as cracks caused by stress concentration at joints.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the rubber water channel member used in the present invention, Fig. 2 is a perspective view of the joint structure of the rubber water channel member according to the present invention, and Fig. 3 is A of Fig. 2. -A sectional view. 1... Rubber water channel member, 4... Step portion, 5...
End portion, 7... Adhesive layer, 8... Holding plate, 10... Tightening material.

Claims (1)

[Scope of utility model registration request] At the joining part of the rubber water channel members each having a U-shaped cross section in which a core material made of a plastically deformable metal material is embedded in the rubber, a thin step part provided at the inner end of the water channel member and another An adhesive layer and a retaining plate are sequentially installed in the groove formed by butting the stepped portions of the water channel members to make it flush with other areas, and this area is further tightened with a tightening material at a substantially constant pitch. A joint structure of rubber waterway members characterized by being mechanically fixed.