JP2004004020A - Water meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water meter for preventing a glass sheet from becoming misty and preventing a defogging seal for preventing the mistiness from peeling off. <P>SOLUTION: An indication unit 26 has a bottomed cylindrical register box 38 with its upper surface opened, an indication mechanism 33 having pointers 34 or digit wheels 35, etc. and housed in the register box 38, the glass sheet 40 rested on a glass-plate-resting step part 42 formed on the periphery of an opening part in the register box 38 so as to close the opening part in an upper surface part of the register box 38, the defogging seal 44 stuck on an under surface of the glass sheet 40, and an O-ring 43 sandwiched between the step part 42 and the defogging seal 44 stuck on the glass sheet 40 for pressing the defogging seal 44 so as to keep water-tight the interior of the indication unit 26 and to prevent the defogging seal 44 from peeling off. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water meter in which an indicating unit is housed in a meter case.
[0002]
[Prior art]
A water meter generally includes a meter case extending cylindrically from an outer surface of a pipe, and an indicating unit housed in the meter case.
The instruction unit detects the rotation of the impeller arranged in the piping in a synthetic resin register box in a non-contact manner by a magnetic coupling or the like, and operates the numeral wheel and hands based on the rotation of the impeller. The indicating mechanism is stored.
The upper surface of the register box is closed by a glass plate. The indicating mechanism is read through the glass plate.
[0003]
As described above, conventionally known water meters have the following problems.
In other words, since the indicating unit was made of synthetic resin, it sometimes came into direct contact with the water flowing in the piping, and water could enter the indicating unit. There was a risk that the lower surface would become cloudy, which would hinder reading of the numeral wheel and the hands.
[0004]
[Problems to be solved by the invention]
In the conventional instruction unit, various methods have been considered to prevent the glass plate from fogging, but it has been difficult to completely eliminate moisture in the instruction unit.
On the other hand, in recent years, anti-fog seals that prevent fogging simply by being attached have become popular. Therefore, the present inventors have come up with the idea that the glass plate should not be clouded even when moisture has entered the indicating unit by attaching an anti-fog seal to the lower surface side of the glass plate.
However, the water meter has been used continuously for many years, and there has been a problem that the anti-fog seal may be peeled off in the indicating unit during use. Once the anti-fog seal has come off in the indicating unit, it is extremely difficult to fix it.
[0005]
Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a water meter that prevents fogging of a glass plate and also prevents peeling of an anti-fog seal that prevents the fogging. .
[0006]
[Means for Solving the Problems]
That is, according to the water meter according to the present invention, in a water meter including a meter case and an indicating unit housed in the meter case, the indicating unit has a bottomed cylindrical register having an open upper surface. A pointing mechanism having a box, a pointer or a numeral wheel, etc., housed in the register box, and a glass plate formed on the periphery of the opening of the register box so as to close the opening on the upper surface of the register box. A glass plate to be placed on the placing step, an anti-fog seal attached to the lower surface of the glass plate, and an inner peripheral side of the placing step on the periphery of the opening on the upper surface of the register box. The anti-fog seal is sandwiched between the formed O-ring mounting step portion and the anti-fog seal so as to make the indication unit watertight and prevent the anti-fog seal from peeling off. It is characterized by comprising the O-ring for pressing.
By adopting this configuration, the anti-fog seal reliably prevents fogging of the glass plate, the O-ring prevents water from flowing from between the glass plate and the register box, and prevents the anti-fog seal from peeling off. Therefore, it is possible to reliably prevent fogging at a low cost and to withstand long-term use.
[0007]
In the O-ring mounting step portion, a storage recess for storing the O-ring is formed, and the O-ring stored in the storage recess is provided on an inner peripheral side and / or an outer peripheral side of the storage concave. The provided abutting portion abuts on the anti-fog seal. Even with such a configuration, the anti-fog seal reliably prevents fogging of the glass plate, the O-ring prevents water from flowing from between the glass plate and the register box, and the O-ring and the contact portion The antifogging seal is pressed so as not to be peeled off, so that fogging can be reliably prevented at low cost, and can withstand long-term use.
[0008]
According to the water meter according to the present invention, in a water meter including a meter case and an indicating unit housed in the meter case, the indicating unit includes a bottomed cylindrical register box having an open upper surface. A pointing mechanism having a pointer, a numeral wheel, etc., and stored in the register box; and a glass plate placed on the periphery of the opening of the register box so as to close the opening on the upper surface of the register box. A glass plate to be placed on the step, an anti-fog seal attached to the lower surface of the glass plate, and stored in a storage recess formed in the glass plate mounting step to abut the glass plate An O-ring and a contact portion provided on the inner peripheral side of the storage recess and in contact with the anti-fog seal so as to prevent peeling of the anti-fog seal.
According to this configuration, the anti-fog seal reliably prevents fogging of the glass plate, the O-ring prevents water from flowing from between the glass plate and the register box, and the contact portion peels off the anti-fog seal. Because it is held down, fogging can be reliably prevented at low cost, and it can withstand long-term use.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(1st Embodiment)
FIG. 1 shows the entire structure of the first embodiment of the present invention, and FIG. 2 shows an enlarged view of a characteristic portion of the first embodiment.
First, the overall structure of the water meter 20 will be described.
The water meter 20 is configured such that an indicating unit 26 is housed in a meter case 25 including an upper case 22 and a lower case 24.
The upper case 22 is provided with a lid 28 that can be opened and closed. Usually, the lid 28 is closed so that the instruction unit 26 is not visible. FIG. 1 shows a state in which the lid 28 is closed.
The lower case 24 is connected to a pipe through which water flows, and a pipe 30 through which water flows is formed. In the lower case 24, an impeller 32 that is rotated by water passing through the pipeline 30 is arranged.
[0010]
The instruction unit 26 will be described.
The instruction unit 26 has a magnet detection unit 37 inside, and can detect the rotation of the magnet rotation unit 31 provided at the tip of the impeller 32 in a non-contact manner. The magnet detecting unit 37 and the magnet rotating unit 31 form a magnet coupling mechanism 41. The instruction unit 26 is a member that displays the amount of water on the numeral wheel 35 and the instruction mechanism 33 having the hands 34 based on the detected rotation speed of the impeller 32.
The indicating unit 26 is formed by storing a indicating wheel 33 and an indicating mechanism 33 having respective hands 34 in a register box 38 made of a synthetic resin having an open upper part.
[0011]
The opening on the upper surface of the register box 38 is closed by a glass plate 40. An antifogging seal 44 for preventing fogging of the glass plate 40 is attached to the lower surface of the glass plate 40 (the surface on the pointing mechanism 33 side). The anti-fog seal 44 has a configuration as described later, but a commercially available anti-fog seal 44 has a sufficient effect.
At the periphery of the opening on the upper surface of the register box 38, a glass plate mounting step 42 formed in a step shape is provided, and the edge of the glass plate 40 is mounted here.
[0012]
FIG. 3 shows an example of the structure of the anti-fog seal 44.
The anti-fog seal 44 is formed in a three-layer structure. A transparent adhesive 54 is applied to the upper surface of a colorless and transparent synthetic resin 52 (PET, PE, acrylic, polycarbonate, etc.), and a surfactant or the like is applied to the lower surface. Is formed by applying a hydrophilic or water-repellent (silicon-based or fluorine-based) anti-fogging agent 56.
For example, by attaching the anti-fog seal 44 coated with the hydrophilic anti-fog agent 56, even if the water in the indicating unit 26 adheres to the anti-fog agent 56, it does not become a fine water droplet, but is uniformly protected. Since it spreads on the surface of the fogging agent 56, fogging of the glass plate 40 can be prevented.
Also, since the anti-fog seal 44 has the anti-fog agent 56 applied to the synthetic resin 52, the anti-fog seal 44 has a heat insulating effect as compared with the case where the anti-fog agent 56 is directly attached to the glass plate 40, and the temperature difference is reduced, so that the anti-fog agent is prevented. The fogging effect increases. Furthermore, the antifogging agent 56 is less likely to be peeled off than when the antifogging agent 56 is directly attached to the glass plate 40, and the antifogging effect is maintained.
[0013]
Another example of the structure of the anti-fog seal 44 will be described.
The anti-fog seal 44 as described above is formed by applying the anti-fog agent 56 to the synthetic resin 52, but may be formed so as to modify the surface layer of the synthetic resin 52 (FIG. Not shown). For example, it is known that by modifying the surface layer of an acetate film, hydrophilicity is imparted to the surface layer of the acetate film, and an antifogging effect can be obtained.
As described above, by adopting the anti-fog seal 44 having the anti-fogging effect on the surface layer of the synthetic resin 52 without applying the anti-fogging agent 56, the function of the anti-fogging seal 44 by peeling off the anti-fogging agent 56 is achieved. There is no fear of lowering, and it is possible to sufficiently endure long-term use.
[0014]
Reference numeral 39 denotes a holding member for holding the glass plate 40.
The pressing member 39 is formed in a ring shape so as to press the peripheral portion of the glass plate 40 so that the central portion of the glass plate 40 can be seen. A plurality of hooks 48 are formed around the pressing member 39 so as to be hooked on a concave portion 49 formed on the side surface of the register box 38.
[0015]
A storage recess 46 for storing the O-ring 43 is formed in the glass plate mounting step 42. The storage recess 46 is formed at a peripheral portion of the glass plate 40 and the anti-fog seal 44 attached to the lower surface of the glass plate 40.
The O-ring 43 is housed in the housing recess 46, and is pressed downward so as to be compressed by the glass plate 40. For this reason, the anti-fog seal 44 attached to the lower surface of the glass plate 40 is also in contact with the O-ring 43.
On the inner peripheral side of the storage concave portion 46, a contact portion 50 that contacts the anti-fog seal 44 on the lower surface of the glass plate 40 is provided.
[0016]
Note that the storage recess 46 of the present embodiment is formed by two members, a recess formed in the register box 38 and a case member 51 disposed inside the recess. Therefore, in the present embodiment, the upper end of the case member 51 corresponds to the contact portion 50 that is in contact with the anti-fog seal 44.
As described above, since the O-ring 43 and the contact portion 50 on the inner peripheral side of the storage recess 46 are in contact with the anti-fog seal 44, the anti-fog seal 44 is prevented from peeling off from the peripheral edge.
[0017]
The storage recess 46 of the first embodiment is not limited to the one formed by the two members of the register box 38 and the case member 51, and the end of the storage recess 46 is formed in the register box 38 by the contact portion 50. It may be provided as.
Further, in the present embodiment, the position of the contact portion 50 that presses the anti-fog seal 44 is not limited to the position provided on the inner peripheral side of the storage recess 46, and is provided on the outer peripheral side of the storage recess 46. May be provided on both the inner peripheral side and the outer peripheral side of the storage recess 46.
[0018]
(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. However, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the second embodiment, the storage recess 46 is not formed in the glass plate mounting step 42, and the glass plate 40 is supported only by the O-ring 43 via the anti-fog seal 44. Even by adopting such a configuration, the O-ring 43 is in contact with the anti-fog seal 44, so that the anti-fog seal 44 is prevented from peeling off from the peripheral portion.
[0019]
(Third embodiment)
FIG. 5 shows a third embodiment of the present invention. A storage recess 46 is formed in the glass plate mounting step 42, and the O-ring 43 is stored in the storage recess 46. Here, the position of the O-ring 43 housed in the housing recess 46 is on the outer peripheral side of the part of the glass plate 40 where the anti-fog seal 44 is attached. For this reason, the O-ring 43 is in contact with the lower surface of the glass plate 40 where the anti-fog seal 44 is not provided.
The contact portion 50 of the storage recess 46 is in contact with the anti-fog seal 44 on the lower surface of the glass plate 40. For this reason, in this embodiment, the end of the storage recess 46 is provided as the contact portion 50 so as to prevent the anti-fog seal 44 from peeling off from the peripheral edge.
[0020]
In the third embodiment, the storage recess 46 is illustrated as being formed integrally with the register box 38. However, similarly to the first embodiment, the storage recess 46 is formed by a case member 51 that is separate from the register box 38. 46 may be formed.
Even in this case, the case member 51 as the contact portion 50 provided on the inner peripheral side of the storage recess 46 contacts the lower surface of the anti-fog seal 44 to prevent the anti-fog seal 44 from peeling off.
[0021]
Although various preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it is a matter of course that many modifications can be made without departing from the spirit of the invention. .
[0022]
【The invention's effect】
According to the water meter according to the present invention, by adopting this configuration, the anti-fog seal surely prevents the glass plate from fogging, and the O-ring prevents water from flowing from between the glass plate and the register box. Since it is prevented and the antifogging seal is pressed so as not to be peeled off, fogging can be surely prevented at low cost, and the antifogging seal can be used for a long time without peeling.
[0023]
According to the water meter according to claim 2, the anti-fog seal surely prevents fogging of the glass plate, the O-ring prevents water from flowing from between the glass plate and the register box, and Since the anti-fog seal is pressed against the abutting portion so as not to be peeled off, fogging can be reliably prevented at low cost, and the anti-fog seal does not come off and can be used for a long time.
[0024]
According to the water meter according to claim 3, the anti-fog seal reliably prevents fogging of the glass plate, the O-ring prevents water from flowing from between the glass plate and the register box, and Since the antifogging seal is pressed so as not to be peeled off, fogging can be surely prevented at low cost, and the antifogging seal can be used for a long time without peeling.
[Brief description of the drawings]
FIG. 1 is a sectional view showing the entire structure of a water meter according to the present invention.
FIG. 2 is an enlarged view in which a mounting portion of a glass plate of the water meter shown in FIG. 1 is enlarged.
FIG. 3 is a sectional view of an anti-fog seal.
FIG. 4 is an enlarged view of a water meter showing a second embodiment of the present invention in which a glass plate mounting portion is enlarged.
FIG. 5 is an enlarged view of a water meter according to a third embodiment of the present invention, in which a glass plate mounting portion is enlarged.
[Explanation of symbols]
Reference Signs List 20 water meter 22 upper case 24 lower case 25 meter case 26 indicating unit 28 cover 30 conduit 31 magnet rotating unit 32 impeller 33 indicating mechanism 34 each hand 35 numeral wheel 37 magnet detecting unit 38 register box 39 pressing member 40 glass plate 41 Magnet coupling mechanism 42 Glass plate mounting step 43 O-ring 44 Anti-fog seal 46 Storage recess 48 Hook 49 Recess 50 Contact portion 51 Case member 52 Synthetic resin 54 Adhesive 56 Anti-fog

Claims (3)

A meter case,
A water meter comprising an indicator unit housed in the meter case,
The indicating unit includes:
A bottomed cylindrical register box with an open top,
An indicating mechanism having a pointer or a numeral wheel, etc., and stored in the register box;
A glass plate placed on a glass plate placement step formed on the periphery of the opening of the register box so as to close the opening on the upper surface of the register box,
An anti-fog seal attached to the lower surface of the glass plate,
O which is sandwiched between the glass plate mounting step and the anti-fog seal attached to the glass plate, presses the anti-fog seal so as to achieve watertightness in the indicating unit and to prevent peeling of the anti-fog seal. A water meter comprising a ring. A storage recess for storing the O-ring is formed in the glass plate mounting step,
The O-ring stored in the storage recess and a contact portion provided on an inner peripheral side and / or an outer peripheral side of the storage concave portion abut on the anti-fog seal. Water meter. A meter case,
A water meter comprising an indicator unit housed in the meter case,
The indicating unit includes:
A bottomed cylindrical register box with an open top,
An indicating mechanism having a pointer or a numeral wheel, etc., and stored in the register box;
A glass plate placed on a glass plate placement step formed on the periphery of the opening of the register box so as to close the opening on the upper surface of the register box,
An anti-fog seal attached to the lower surface of the glass plate,
An O-ring that is stored in a storage recess formed in the glass plate mounting step portion and abuts on the glass plate;
A water meter provided on the inner peripheral side of the storage recess, the contact portion being in contact with the anti-fog seal so as to prevent the anti-fog seal from peeling off.

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