JPH0342128Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an inner lid device for a water meter casing, and relates to a structure for preventing freezing of water meters, water stop valves, and the like.

[Conventional technology]

Conventionally, in order to prevent this type of water meter from freezing,
A structure was adopted in which a heat insulating material was applied to the back side of the outer cover of the water meter housing in which the water meter was housed, and to the inner circumferential wall of the water meter body.

[Problem that the invention attempts to solve]

In the above conventional structure, if a pebble or the like gets caught in the fitting part between the outer cover and the water meter body, a gap is created between the outer cover and the water meter body, and cold air infiltrates through this gap.
On the other hand, since the air at the bottom of the water meter housing is kept warm by geothermal heat, the air inside the housing causes vertical convection,
This has the disadvantage that the temperature inside the casing drops and the water meter freezes.

In order to prevent this phenomenon, the middle part of the water meter housing is partitioned almost horizontally with a removable inner lid to block air convection within the housing, and the lower part of the inner lid where the water meter is located is is known to have a structure that prevents cold air from entering. However, this structure has the disadvantage that it takes time to remove and attach the inner cover during meter reading, and that a support part must be formed on the inner wall of the casing in order to attach the inner cover. In addition, since water pipes are buried below the freezing depth of the area where they are installed, the depth of the water meter is not constant. The problem is that it creates extra space above the vessel, making it impossible to utilize geothermal heat effectively.

The purpose of this invention is to seal the elongated hole of the frame placed in the middle of the water meter housing with an inner lid that can be opened and closed, thereby reliably separating the convection of cold air and warm air within the housing. To provide an inner lid device for a water meter casing that prevents the water meter from freezing by increasing the heat retention effect inside the casing and also allows easy meter reading.

[Means for solving problems]

The present invention is made of a foamed resin that is formed approximately equal to or slightly larger than the inner periphery of the water meter housing body, and is placed approximately horizontally in the middle of the body, and is molded from a flexible foamed resin with low shrinkage. A long hole is formed in the approximate center of a heat-insulating, generally rectangular plate-shaped frame, and a flange that protrudes upward is formed along the inner periphery of the long hole, and the long hole is formed in the frame. The present invention is characterized in that an inner cover made of a heat insulating material that can be opened and closed is rotatably attached, and an engagement recess that engages with the flange edge is formed near the outer periphery of the lower surface of the inner cover.

[Effect]

This invention has an insulating frame molded from a flexible foamed resin with little shrinkage disposed approximately horizontally in the middle of the inner periphery of the water meter casing, and is rotatably attached to this frame. When the inner lid made of a heat insulating material that opens and closes the elongated hole of the frame is closed, the engagement between the flange and the engaging recess seals and interrupts the water flow, interrupting the convection inside the water meter housing and closing the water meter. In addition to preventing freezing, the frame body can be attached to the housing body using its flexibility without forming a support part on the inner circumferential wall of the housing body, and the meter reading of the water meter can be done using the inner lid. The event will be held in public.

〔Example〕

The configuration of an embodiment of the present invention will be explained with reference to FIGS. 1 to 3. FIG.

Reference numeral 1 denotes a water meter housing body, which is composed of a cylindrical body 2 with a generally rectangular top surface and a box-like bottom portion 3 with a generally rectangular top surface bent upward at the periphery. An outer lid 6 is fitted into an engaging step 5 provided inwardly protruding from the portion 4 so as to be openable and closable. Further, recesses 7, 7 are provided at the lower portions of the opposing sides of the body 2, and recesses 8, 8 are provided at the upper portions of the corresponding bottom 3, which protrude from the lower edge of the body 2. Fixed edge 9
When the fixing edge 10 protruding from the upper edge of the bottom part 3 is engaged with the recesses 7, 7, 8, 8, the recesses 7, 7, 8, 8 form insertion holes 11, 11 through which water pipes (not shown) are inserted. Further, a water meter and a water stop valve (not shown) connected to a water pipe are housed above the bottom portion 3 in the water meter housing body 1.

Reference numeral 12 denotes an inner lid device, which is formed approximately equal to or slightly larger than the inner periphery of the housing body 1, and has a frame 14 having a generally rectangular upper surface and a long hole 13 in the center, which is fitted to the inner periphery by elastic force. , an inner lid 16 is rotatably attached to the frame 14 via support shafts 15, 15 to open and close the elongated hole 13 of the frame 14, and the frame 14 and the inner lid 16 are made of foamed foam. It is molded from a foamed resin with low shrinkage and flexibility, such as polypropylene or foamed polyethylene.

Further, a stepped portion 17 is formed in the intermediate portion of the frame 14, and the inner circumferential portion of the stepped portion 17 is formed to be thicker than the outer circumferential portion.
A flange 18 that protrudes upward along the inner peripheral edge of the inner lid 16 is formed around the entire circumference, and an engagement recess 19 is formed on the lower surface of the inner lid 16 to be engaged with the flange 18 of the frame 14. It's becoming like that. Further, on one long side of the stepped portion 17 of the frame 14, a support shaft 15 of the inner lid 16,
A pair of bearing parts 20, 20 for pivotally supporting 15 are formed.

Further, the frame body 14 is attached to one long side of the inner lid 16.
A pair of support shafts 15, 15 supported by a bearing portion 20 of
are provided protrudingly, and furthermore, these support shafts 15, 1
A handle 21 is provided protruding from the center of the long side opposite to the long side from which the numeral 5 is protruded.

Next, the operation of this embodiment will be explained.

Remove the outer lid 6 of the water meter housing and insert the frame 14 into the housing body 1 through the opening surface of the housing body 1, so that the outer peripheral edge of the frame body 14 is approximately horizontal to the inner peripheral wall of the housing body 1. When press-fitted like this, this frame body 14 is attached to the housing body 1.
The middle lid 16 is supported by the elastic force of the frame 14 on the inner circumferential wall of the water meter housing, and when the elongated hole 13 is closed, the engagement recess 19 is engaged with the flange 18 of the frame 14, and the inner lid 16 is closed. The inside of the main body 1 is reliably divided into a bottom space where water pipes, a water meter, and a water stop valve are housed, and an upper space. By attaching the frame 14 inside the water meter housing body 1 in this way, the convection of air inside the housing can be interrupted, and even if cold air enters from the gap between the outer lid 6 and the housing body 1, the water meter The bottom of the case where the water meter is stored is kept warm by geothermal heat, which prevents the water meter from freezing.

Furthermore, the outer circumferential portion of the frame 14 is made relatively thin in order to be press-fitted to the inner circumferential wall of the housing body 1;
Since the inner peripheral portion of the frame body 14 is made thicker by forming a vertical or inclined step portion 17, it has sufficient strength to fit the inner lid 16.

When reading the meter, the handle 21 protruding from the inner cover 16 is used to open and close the inner cover 16, thereby making it easy to read the meter.

Further, the frame 14 can also be supported by a support portion formed within the main body 1.

Furthermore, since the frame body 14 and the inner lid 16 are formed from a foamed resin such as foamed polypropylene or foamed polyethylene, which has little shrinkage over time and has appropriate flexibility, when they are formed from foamed polystyrene. It does not shrink over time and fall into the casing, as in the case of foamed urethane, and it does not break easily due to its hardness, as in the case of urethane foam.

Further, in the above embodiment, the engagement recess 19 of the inner lid 16 that is engaged with the flange 18 of the frame body 14 is a concave groove, but the engagement stepped portion is opened toward the outer edge and has an inverted L-shaped cross section. You can also use it as

Further, in the above embodiment, the outer circumferential portion of the frame 14 is made thinner and the inner circumferential portion is thickened, so that the stepped portion 17 is formed. It may also be a sloped structure in which the wall thickness gradually increases.

[Effect of idea]

According to the present invention, a foamed resin insulation material with low shrinkage and flexibility is placed horizontally within the main body of the water dispenser housing, in which the outer lid is fitted into the top opening and the water dispenser is housed at the bottom. Since a frame body made of aluminum is provided and an inner lid made of a heat insulating material is provided to open and close the elongated holes of this frame, even if cold air enters through the gap between the outer lid and the water dispenser housing, the water dispenser housing will remain intact. Since the inside of the main body is divided into upper and lower parts by the frame and the inner lid, the convection of air inside the case is divided, and therefore the heat retention effect of the geothermal heat on the bottom of the water meter case where the water meter is housed is reduced. Moreover, the elongated hole of the inner lid is sealed by the engagement of the engagement recess with the flange of the frame body, and the shutoff is reliable and the water meter can be prevented from freezing. The frame can be supported by its flexibility even without forming a support part on the container case, and furthermore, since the inner lid is rotatably attached to the frame, the amount of water can be increased. The meter of the device can be easily read.

[Brief explanation of drawings]

Fig. 1 is a front cross-sectional view showing how an inner lid device according to an embodiment of the present invention is attached to the water meter case; Figure 3 is a top view of the same as above. 1... Water meter housing body, 12... Inner lid device, 13
... Long hole, 14 ... Frame body, 16 ... Inner lid, 18 ...
...Brim edge, 19... Engagement recess.

Claims (1)

[Scope of utility model registration request] A heat-insulating abbreviation formed from a foamed resin with low shrinkage and flexibility, which is formed approximately equal to or slightly larger than the inner periphery of the water meter housing body, and placed approximately horizontally in the middle of the body. A long hole is formed in the approximate center of a rectangular plate-shaped frame body, a flange is formed along the inner peripheral edge of the long hole that protrudes upward, and the frame body has a heat insulating structure that opens and closes the long hole. 1. An inner lid device for a water dispenser casing, characterized in that an inner lid made of material is rotatably attached, and an engagement recess that engages with the flange is formed near the outer periphery of the lower surface of the inner lid.