JPH0354207Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an underground water meter housing equipped with a sediment inflow prevention structure that prevents earth and sand from flowing into the water meter housing.

[Conventional technology]

FIG. 5 shows a partially cutaway front view of a conventional water meter casing using a sediment inflow prevention plate, and FIG. 6 shows a side view of the same water meter casing. This water meter housing 30 is a water meter 2
It consists of a pedestal 3 on which the pedestal 3 is placed, a bottom box 5 having a notch 4 into which the pedestal 3 is fitted, and a receiving frame 7 having a lid 6 that can be opened and closed.

At the abutting portions of both sides of the bottom box 5 and the receiving frame 7, cutouts 9 and 31, each having a sleeve-shaped pipe insertion portion 19 and 33 formed on the outer periphery, are provided so as to form an opening 32 when superimposed. . And this opening 3
Pipes 12 and 13 installed underground are inserted through the pipes 2 and connected to the water meter 2 and a water stop valve 15 via a union 14. Note that this opening 32 is the sixth
As shown by the broken line in the figure, it is opened in a substantially rectangular shape, and has pipes 12, 13 and pipe insertion parts 19, 33.
Since there is a gap between the
into the pipes 12 and 13, and insert the pipe insertion part 1.
The inflow of earth and sand was prevented by closing the gaps between 9 and 33.

As shown in detail in FIG. 7, this earth and sand inflow prevention plate 35 has a plurality of annular grooves 36a to 36d of different diameters concentrically formed around a through hole 34 formed approximately in the center. , these annular grooves 36
A to 36d are continuously provided with arc-shaped long holes 37a to 37d in the circumferential direction thereof. The inner diameter of the through hole 34 is increased by cutting out the inner portions of the annular grooves 36a to 36d depending on the outer diameter of the pipes 12 and 13 used.
In addition, the reference numeral 38 in the figure is a reinforcing rib, and the reference numeral 39 is a groove for bending the earth and sand inflow prevention plate 35 as necessary.

Further, FIG. 8 shows that radial grooves 41 are provided around a through hole 40 formed approximately in the center of an elastic plastic plate, and tongue pieces 42 formed between each radial groove 41 have elastic properties. The earth and sand inflow prevention plate 43 is shown as being deformable. This sediment inflow prevention plate 4
3, when the notch 45 continuous with the through hole 40 is widened and the pipes 12 and 13 are inserted into the through hole 40, each elastic tongue piece 42 is pushed out and the pipe 12 is inserted, as shown in FIG. , 13, and can prevent the inflow of earth and sand. In addition,
Reference numeral 44 in the figure is a reinforcing rib.

[The problem that the idea aims to solve]

However, in the conventional water meter case using the sediment inflow prevention plate 35 shown in FIG.
During the installation work, there was a problem in that it took time and effort to cut out the inner diameter of the through hole 34 to match the outer diameter of the pipes 12 and 13 to be used. Also,
Even if the sediment inflow prevention plate 35 has the structure described above, it is impossible to adapt it to all types of pipes with outside diameters, and only pipes with standard outside diameters. For pipes with an outer diameter, the annular grooves 36a to 36d, which have an inner diameter one size larger than the pipe, are cut out for use. Therefore, pipes 12, 13
Sediment inflow from the gap between the earth and earth inflow prevention plate 35 is as follows.
It remains unresolved. Furthermore, since the earth and sand inflow prevention plate 35 has a relatively plurality of structures, there is a problem in that the manufacturing cost becomes high.

Furthermore, in the conventional water meter housing 30 using the other sediment inflow prevention plate 43 shown in FIGS. 8 and 9, when the pipes 12 and 13 are inserted into the through holes 40,
Since each tongue piece 42 is pushed out and the width of each radial groove 41 is expanded, there is a problem that earth and sand still flows into the water meter housing 30 from the gap between each radial groove 41. Further, there were problems in that the manufacturing cost of the earth and sand inflow prevention plate 43 increased and there was a limit to the range of elastic deformation.

Furthermore, since the sediment inflow prevention plates 35 and 43 used in the conventional water meter housing 30 are handled as separate parts from the water meter housing 30,
0, the water meter housing 30 and the sediment inflow prevention plates 35, 43 must be handled and transported separately, and the management and installation work of the sediment inflow prevention plates 35, 43 is said to be time-consuming. There was a problem.

The present invention solves the problems of the conventional method described above, and provides a water meter housing equipped with a sediment inflow prevention structure that can prevent the inflow of sediment at a low cost regardless of the outer diameter of the pipe used. The purpose is to provide

[Means to solve the problem]

In order to solve these problems, the present invention has been developed to form a concave groove along the inner circumference of the pipe insertion part of the underground water meter housing for the pipe insertion of the same volume water meter housing. The present invention is characterized in that a fitting having a shape along which a groove runs is fitted into the groove with a soil inflow prevention film sandwiched between the fitting and the groove.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a partially cutaway front view of a water meter housing equipped with a structure for preventing inflow of earth and sand according to the present invention, Fig. 2 is a side view showing the main parts of the joint frame, and Fig. 3 is a side view of the same joint frame. −
The line sectional view, FIG. 4, is a perspective view of the joint frame shown in FIG. 3, viewed from the direction of arrow P.

In the figure, reference numeral 1 indicates a water meter housing equipped with a structure for preventing inflow of earth and sand according to the present invention. This water meter case 1
consists of a pedestal 3 on which the water meter 2 is placed, a bottom box 5 having a cutout hole 4 into which the pedestal 3 is fitted, a holder frame 7 with a lid 6 that can be opened and closed, and the bottom box 5 and the holder frame. 7 and a joint frame 8 disposed between them.

In the upper edges of both sides of the bottom box 5, a notch 9 is bored, which has a sleeve-shaped pipe insertion part 19 formed on the outer periphery, similar to the bottom box of the conventional water meter case.

On the other hand, the joint frame 8 is composed of an inner wall 16, an outer wall 17, and a connecting member 18 that connects the two, and a U-shaped pipe is provided on the outer periphery of the bottom box 5 at both lower edges aligned with the notch 9. Notch 10 in which insertion portion 20 is formed
is drilled. Note that the notches 9 and 10 form an opening 11 when aligned, through which pipes 12 and 13 installed underground are inserted and connected to the water meter 2 and the water stop valve 15 via the union 14. Ru.

On the outer wall 17 side of the pipe insertion part 20 of the joint frame 8,
As shown in FIG. 4, a groove 21 is formed along the inner circumference of the pipe insertion portion 20.

A sediment inflow prevention film 22 made of a waterproof and flexible material such as polyethylene film is attached to this groove 21 by an elastic, substantially U-shaped fixture 23 made of metal or plastic. . That is, as shown in FIG. 4, a rectangular earth and sand inflow prevention film 22 is arranged on the open side of the pipe insertion part 20 of the joint frame 8, and
The sediment inflow prevention film 22 can be attached to the pipe insertion part 20 by fitting the fitting 23 along the concave groove 21 of the pipe insertion part 20 while pressing one surface of the end side of the sediment inflow prevention film 22 in step 3. can.

In the figure, reference numeral 24 is a reinforcing rib, and 25 is a projection for positioning the receiving frame 7 and the joint frame 8. In addition, in this embodiment, the notch 3 of the receiving frame 7
1 is unnecessary, and by fixing the closing plate 26 to the pipe insertion portion 33, the opening 32 is closed and earth and sand are prevented from flowing in from the outside.

Next, the installation procedure of the water meter housing 1 will be explained.

First, place the bottom box 5 under the water meter 2, and
Install so that the pipes 12 and 13 are located inside. After the bottom box 5 is installed, the joint frame 8 and the receiving frame 7 are connected thereto, and the sediment inflow prevention film 22 attached in advance to the pipe insertion part 20 of the joint frame 8 is connected to the bottom box 5.
After wrapping it around the pipes 12 and 13 as shown in Fig. 1 and fixing it with tape etc. as necessary,
By burying the pipes 12, 13 and the water meter housing 1, earth and sand will not flow into the water meter housing 1.

In the above-described embodiment, the joint frame 8 was disposed between the bottom box 5 and the receiving frame 7, but if the depth of the pipes 12 and 13 is relatively shallow, the bottom box 5 and the receiving frame 7 may be directly joined. Of course, a groove similar to the groove 21 may be formed in the pipe insertion portion 33 of the receiving frame 7, and the earth and sand inflow prevention film 22 may be attached thereto.

[Effect of idea]

As described above, according to the present invention, the following effects can be obtained.

The sediment inflow prevention film can be deformed in any way depending on the outside diameter of the pipe used.
The inflow of earth and sand can be reliably prevented regardless of the outside diameter of the pipe.

Since the sediment inflow prevention film can be attached to the water meter casing in advance, it is possible to save time and effort at the work site, and to prevent the sediment inflow prevention film from being powdered.

When transporting the water meter case with the sediment inflow prevention film still attached to the water meter case,
Since the sediment inflow prevention film can be folded and stored inside the water meter housing, there is no need to increase the volume of the transport container for transporting the water meter housing, and the conventional one can be used as is.

The mounting tool and the soil inflow prevention film can be commercially available products that are extremely simple in structure, inexpensive, and easily available, so that manufacturing costs can be reduced.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of a water meter casing equipped with a structure for preventing the inflow of earth and sand according to the present invention, Figure 2 is a side view showing the main parts of the joint frame, and Figure 3 is a cross section of the joint frame taken along the - line. Figure 4 is a perspective view of the joint frame shown in Figure 3 viewed from the direction of arrow P, Figure 5 is a partially cutaway front section of a conventional water meter casing using a sediment inflow prevention plate, Figure 7 is a side view of the same water meter case, Figure 7 is a front view showing an example of a sediment inflow prevention plate used in a conventional water meter housing, and Figure 8 is another example of the sediment inflow prevention plate. The front view shown in FIG. 9 is a sectional view showing a state in which a pipe is inserted through the earth and sand inflow prevention plate shown in FIG. 1... water meter housing, 2... water meter, 5... bottom box,
6... Lid, 7... Receiving frame, 8... Joint frame, 9, 10...
...notch, 11... opening, 12, 13... pipe,
15... Water stop valve, 19, 20... Pipe insertion part,
21... Concave groove, 22... Sediment inflow prevention film,
23...Mounting tool.

Claims (1)

[Scope of utility model registration request] In an underground type water meter housing, a groove is formed along the inner periphery of the pipe insertion portion of the water meter housing, and a fitting having a shape along the groove is connected to the fitting and the above-mentioned fitting. A water meter housing, characterized in that the housing is fitted into the groove with a sediment inflow prevention film sandwiched between the groove and the groove.