JPS6220538Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field of the invention The invention relates to a water meter case for use in cold regions.

Technical background of the idea and its problems In cold regions, water meters need to be buried at least 1 meter deep underground to prevent them from freezing during the winter.
For this reason, conventionally, hollow casings were buried in layers stacked one on top of the other, but in this case, if the casings have constricted recesses or protrusions such as ribs due to freezing of water in the soil, they will be pushed upward and stacked. There was a risk that parts would come off.

Purpose of the invention In order to solve these problems, the present invention is made by stacking hollow cylindrical bodies that are blow-molded into a downwardly tapered shape and have no narrow recesses or protrusions, so that the entire body is tapered downwardly. An expanded layered body is formed so that the frozen soil slides upward on the circumferential wall of the hollow cylindrical body so that the upward force when the soil freezes does not act on the hollow cylindrical body, and an inner lid is further fitted into the layered body. The purpose of the present invention is to provide a water meter housing which is designed to shut off outside air.

Summary of the invention This invention is a stack of hollow cylindrical bodies formed by blow molding that taper downwardly and have a concave part on the outer circumferential surface and no part protruding beyond the lower outer circumferential surface. It is characterized by forming a stacked body that tapers downward as a whole, and an inner lid is fitted in the middle of this stacked body, allowing frozen soil to slide upward along the circumferential wall of the hollow cylindrical body. This prevents the upward force caused by frozen soil from acting on the structure, and the inner lid blocks outside air.

Embodiments of the invention Next, embodiments of the invention will be described with reference to the accompanying drawings.

1 and 2 are blow-molded upper and lower hollow cylindrical bodies made of synthetic resin, which are tapered downward and have no concave part on the outer circumferential surface and no part that protrudes beyond the lower outer circumferential surface. , furthermore, there is no step part in the middle. The outer diameter of the lower end of the upper hollow cylindrical body 1 is smaller than the outer diameter of the upper end of the lower hollow cylindrical body 2, so that the entire laminate 4 has a tapered shape expanding downward. There is. Further, a synthetic resin frame 5 is fitted and fixed to the upper opening edge of the upper hollow cylindrical body 1, and a synthetic resin outer cover 6 is fitted to this frame 5. Further, the lower end opening edge is bent inward and further bent downward to form the engagement step portion 7. Further, the lower hollow cylindrical body 2 has an upper end opening edge bent inward to form an engagement edge 8 having a larger outer diameter than the outer diameter of the engagement step 7. The engagement step 7 of the upper hollow cylindrical body 1 is engaged, and the flexible synthetic resin inner lid 9 is engaged with the engagement step 4. Further, water pipe inlets 10, 10 are opened on both sides of the lower end of the lower hollow cylindrical body 2, and the lower end edge forms a bent edge 11 bent inward. A bottom plate 12 is provided at the bottom of the lower hollow cylindrical body 2.

Next, the operation of this embodiment will be explained.

The upper hollow cylindrical body 1 is stacked on the lower hollow cylindrical body 2 housing the water meter, and the inner lid 9 is engaged with the engagement step 7. The inner lid 9 has a larger diameter than the opening of the upper hollow cylindrical body 1, but is flexible, so it is folded and inserted through the opening. Next, the outer cover 6 is fitted into the upper opening. In this way, the upper and lower hollow cylindrical bodies 1 and 2 are buried in the soil. The outside air is doubly blocked by the outer cover 6 and the inner cover 9, and the water meter is housed at the bottom of the lower hollow cylindrical body 2 and is buried deep underground, so there is no risk of freezing. In addition, when the soil rises due to freezing of underground moisture, the upper and lower hollow cylinders 1 and 2 expand downward in a tapered shape,
Furthermore, since there is no constricted recess on the outer circumferential surface or any part protruding from the lower outer circumferential surface, the upward force due to freezing does not act on this circumferential wall, so that the upper and lower hollow cylindrical bodies 1 and 2 are pushed up by this freezing. Nothing happens. Rather, the soil that has risen due to freezing of underground water is pushed up while sliding down the tapered peripheral wall surface toward the ground due to the drag generated by pressing the tapered peripheral wall.

Effects of the invention According to the invention, the hollow cylindrical body on which the laminate is formed is expanded downward in a tapered shape, and the concave part narrowed on the outer circumferential surface and the part protruding from the lower outer circumferential surface are eliminated, Furthermore, since these hollow cylindrical bodies were stacked to form a laminate that expanded downward in a tapered shape, when buried underground,
Even if the moisture in the soil freezes and upward force is generated in the soil, there are no constricted recesses or protrusions on the outer circumferential surface of the hollow cylindrical body or the stacked parts of the laminate, where upward force in the soil acts. In addition, due to the tapered shape, the frozen soil slides upward on the outer circumferential surface of the hollow cylindrical body, and no upward force is applied to the wall surface, so the hollow cylindrical body is not pushed up. There is no possibility of separation and dirt getting inside, or incomplete stacking. moreover,
Since it is a laminated body, the water meter can be buried deep underground to prevent freezing, and since the inner lid is fitted to the laminated body, it is possible to prevent outside air from entering and further improve the anti-freezing effect. Furthermore, since the hollow cylindrical body is formed by blow molding, the manufacturing cost can be reduced, and since the hollow cylindrical body is made into a laminated body, the mold can be small. It is also possible to reduce the size by fitting the cylindrical body into a hollow cylindrical body below.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a water meter case showing an example of the implementation of the present invention, and FIG. 2 is a plan view of the same. 1, 2...Hollow cylindrical body, 4...Laminated body, 9...
Inner lid.

Claims (1)

[Scope of utility model registration request] Formed by blow molding, the hollow cylindrical bodies are stacked and tapered downward and have a concave part on the outer circumferential surface and no part that protrudes beyond the lower outer circumferential surface, and the entire body tapers downward. A water meter casing characterized by forming a laminate that expands into a shape, and having an inner lid fitted in the middle of the laminate.