JP2005009165A - Meter box cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meter box cover for holding its consistent heat retaining effect by preventing the separation of a heat retaining plate material of a styrene foam or the like except when manually removing it. <P>SOLUTION: The cover comprises a protrusion integrally provided on the reverse, which is in an inverted conical shape and which has supporting holes formed inside, the heat retaining plate material fitted to the protrusion, and anchoring members inserted through the outer face of the heat retaining plate material into the supporting holes of the protrusion. The cover is made of cast metal. The heat retaining plate material uses the styrene foam, the anchoring members are pin materials each having a slanting annular protruded strip, and the supporting holes are each in an inverted conical shape along the outer peripheral face of the protrusion. The used anchoring members are split pins whose leg portions are unfolded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in the structure of a lid for opening and closing the upper surface opening of a meter box (meter meter) that uses a meter (flow meter) in a water supply facility, in particular.
[0002]
[Patent Literature]
The applicant has searched the prior technical literature, but has not found anything that seems to be similar to the present invention.
[0003]
BACKGROUND OF THE INVENTION
In general, a meter box in a water supply facility is formed in the soil and has a structure with an open upper surface. In this meter box, a meter connected to a pipe, a gate valve, and a short pipe are expropriated. A lid is pivotally attached to the upper opening so as to be freely opened and closed.
[0004]
Further, the above-mentioned lid body is usually formed by casting, and in particular in cold districts or the like, in order to prevent freezing of circulating water, this lid body is provided with a heat insulating material, which is also provided with a plate-shaped heat insulating material. Has been done.
[0005]
As this heat insulating material, a polystyrene foam is often used, and conventionally, a foamed polystyrene foamed in a plate shape is adhered to the back surface of the lid with an adhesive.
[0006]
[Problems to be solved by the invention]
However, the structure in which the foamed polystyrene is pasted to the back of the lid using an adhesive is easily peeled off due to moisture, drying, other external shocks, vibrations, etc. In addition to being forced, if you don't know the peeled state, you won't get any warming effect.
[0007]
OBJECT OF THE INVENTION
Therefore, the present invention has been made by paying attention to the above-mentioned conventional actual situation and problems, and such problems are resolved, and the thermal insulation plate material including foamed polystyrene is peeled off except for being removed artificially. The object of the present invention is to provide a lid for a meter box that can maintain a constant heat-retaining effect.
[0008]
[Means for Solving the Problems]
In order to achieve this object, the lid of the meter box according to the present invention has an inverted conical shape on the back surface, and a protrusion having a receiving hole formed therein is integrally formed, and a heat retaining plate material is fitted to the protrusion. The fixing member is inserted from the outer surface of the heat insulating plate material into the receiving hole of the protrusion, the lid body is made of cast metal, and the heat insulating plate material is made of foamed polystyrene. The fixing member described above is characterized in that it is a pin member provided with an oblique annular ridge.
[0009]
Further, the lid of the meter box according to the present invention is characterized in that the above-mentioned receiving hole has an inverted conical shape along the outer peripheral surface of the protrusion, and a split pin whose leg portion is expanded is used as a fastening member. It is said.
[0010]
[Action]
By adopting the above-described configuration, the protrusions protruding on the back surface of the lid body are bitten and fitted into the heat insulating plate material such as polystyrene foam, and further, the receiving member penetrates the heat insulating plate material by the fastening member. Therefore, unless the heat insulation plate material is intentionally removed, the heat insulation plate material is stably held on the back surface of the lid body, and the heat insulation effect can always be maintained.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the present invention will be described with reference to the drawings. 1 is a sectional view showing a lid of a meter box according to the present invention separately, FIG. 2 is a front view of the fastening pin material, FIG. 3 is a partial sectional view showing another fastening structure, and FIG. It is a back view of a lid similarly.
[0012]
In these drawings, reference numeral 1 denotes a lid body of a meter box (meter), and this lid body 1 is formed by casting in the present embodiment, but is particularly limited to casting. For example, it is also possible to mold with a plastic such as another metal, ceramic or reinforced plastic.
[0013]
A plurality of protrusions 2, 2 are integrally projected on the back side of the lid body 1. The projections 2 and 2 have an inverted cone shape, particularly an inverted cone shape, and the head portion thereof is a truncated type.
[0014]
In addition, receiving holes 3 and 3 having one end opened are provided in the projections 2 and 2 described above. A fixing member, which will be described later, is inserted and fitted into the receiving holes 3 and 3.
[0015]
On the other hand, reference numeral 4 in the figure indicates styrene foam as a heat retaining plate material. In the present embodiment, the foamed polystyrene 4 is used as the heat insulating plate material, but the present invention is not limited to this, and if there is a shape retaining property at a certain end edge, a layer, a rasha, a knitted fabric, etc. are used by being laminated. Is also possible.
[0016]
This foamed polystyrene 4 is pressed against the back surface of the lid body 1, and the protrusions 2 and 2 are bitten into the foamed polystyrene 4 to be polymerized. In other words, the protrusions 2 and 2 are embedded in the expanded polystyrene 4. Even when the protrusions 2 and 2 bite into the polystyrene foam 4, a certain amount of mounting force can be obtained by the frictional force.
[0017]
After the foamed polystyrene 4 is mounted, the fastening member, in this embodiment, the fastening pins 5 and 5 are inserted into the receiving holes 3 and 3 of the projections 2 and 2 from the outside of the foamed polystyrene 4.
[0018]
The fixing pins 5 and 5 have a substantially disc-shaped head 6 serving as a presser, and an insertion shaft 7 is integrally projected at the center of the head 6. A plurality of slanted annular ridges 8, 8... Are integrally formed at a predetermined pitch on the insertion shaft 7, and the fastening pins 5, 5 are inserted into the foamed polystyrene 4 and penetrated to receive holes. When it is received at 3.3, this annular ridge 8, 8,.
[0019]
Further, FIG. 3 shows another embodiment of the present invention. In this case, the receiving hole 3 a formed in the protrusion 2 is formed in an inverted conical shape along the outer surface of the protrusion 2.
[0020]
Further, the fastening pin 5a used here is a split pin having insertion portions 9 and 9 each having a spring property. The insertion parts 9 and 9 are made of spring material having an urging force in the expanding direction, and are inserted into the foamed polystyrene 4 in a squeezed state. It has become.
[0021]
Specifically, although the fastening pins 5 and 5a are illustrated as the fastening members, it is needless to say that other known screws and anchors can be applied and used.
[0022]
【The invention's effect】
The lid of the meter box according to the present invention is configured as described above. Therefore, heat insulation plate materials such as Styrofoam are not exfoliated and dropped off except for a deliberate case, and the heat insulation plate material can be maintained constantly at all times. Troublesome work such as re-sticking can be made unnecessary.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a lid of a meter box embodying the present invention separately.
FIG. 2 is a front view of a fastening pin material.
FIG. 3 is a partial cross-sectional view showing another fastening structure.
FIG. 4 is a rear view of the lid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover body 2 Protrusion 3 Receiving hole 3a Receiving hole 4 Styrofoam 5 Fastening pin 5a Fastening pin 6 Head 7 Insertion shaft 8 Annular protrusion 9 Insertion part

Claims (4)

A protrusion with an inverted conical shape on the back surface and a receiving hole formed inside is integrally provided, and a heat insulating plate material is fitted to the protrusion, and is fixed to the receiving hole of the protrusion from the outer surface of the heat insulating plate material. A lid for a meter box, wherein a member is inserted. 2. The meter box lid according to claim 1, wherein the lid is made of a casting, and the insulating plate material is made of polystyrene foam. The lid of the meter box according to claim 1 or 2, wherein the fastening member is a pin member provided with an oblique annular protrusion. The said receiving hole was made into the shape of an inverted cone along the outer peripheral surface of a processus | protrusion, and the split pin which a leg part expands was used as a fastening member. Meter box lid.

Images