JP3538259B2 - Gas meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas meter provided with a counter for instructing the total flow of gas.

[0002]

2. Description of the Related Art A shut-off valve, a seismic sensor for detecting an earthquake, a pressure sensor for detecting a gas pressure drop, and a control circuit are built in a gas meter main body. In the event of an emergency, a gas meter that operates a shut-off valve to shut off the gas flow is known as a microcomputer meter.

The gas meter main body is provided with a character wheel type counter for instructing the integration of the gas flow rate, and this counter is covered by a counter cover fixed to the gas meter main body by a plurality of fixing screws. The counter cover is provided with a glass window so that the integrated indication value can be read through the glass window at the time of meter reading.

[0004] The gas meter has an expiration date of 7 years or 10 years set by the Measurement Law, and is provided with a sealing tag indicating the expiration date. As shown in FIG. 3, the sealing tag is attached to one of a plurality of fixing screws 3 for fixing the counter cover 1 to the gas meter main body 2 via a bracket 4. Bracket 4
Has a structure in which the metal plate is folded in two, the head 3a of the fixing screw 3 is wrapped by the folded portion 5a, and the vicinity of both ends is fixed by the sealing lead 5.

[0005] According to this sealing tag, since the head 3a of the fixing screw 3 is wrapped by the folded portion 5a of the bracket, it is impossible to loosen the fixing screw 3 carelessly. It is a structure that cannot be done.

[0006]

However, in the gas meter configured as described above, in order to attach a sealing tag,
When the counter cover 1 is fixed to the gas meter main body 2 by the fixing screw 3, the bracket 4 is fixed at the same time,
Next, a laborious work of fixing the sealing lead 5 after folding the bracket 4 in half is required. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a gas meter that can easily and reliably attach a sealing cover.

[0007]

According to the present invention, in order to achieve the above-mentioned object, a first aspect of the present invention is to provide a gas meter body with a counter for instructing integration of a gas flow rate in a part thereof.
In a gas meter in which the counter is covered by a counter cover fixed to the gas meter main body by a fixing screw, a recess is provided in the counter cover for accommodating a head of the fixing screw, and an opening of the recess is formed by the fixing screw. Closed tightly by a sealing lid having an engaging claw engaged and fixed to the head of
When removing the sealing lid from the counter cover,
A notch portion that can be inserted and locked on the back side of the sealing lid is provided .

According to a second aspect of the present invention, the head of the fixing screw is provided with a flange to which the engaging claw is engaged. A third aspect of the present invention is characterized in that the sealing lid is formed of a synthetic resin, and the engaging claw is provided integrally.

According to a fourth aspect of the present invention, the engaging claw of the sealing lid is elastically engaged by pushing the fixing screw against the head, and is broken and removed by a prying operation of the sealing lid.

[0010]

Since the engaging claw is provided integrally with the sealing lid, the engaging claw is positioned on the head of the fixing screw, and when the finger is pushed by a finger or the like, the engaging claw is elastically attached to the head of the fixing screw. Engagement secures the sealing lid with the counter cover. In addition, when the seal expiration date is reached and the seal lid is pryed apart, the engagement claws are broken and the seal lid is removed.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the mounting structure of the sealing lid, and FIG. 2 shows the entire configuration of the gas meter. The gas meter main body 1 includes an upper case 2 and a lower case 3. A gas inlet 4 is provided on one side of the upper case 2, and a gas outlet (not shown) is provided on the other side.

A partition wall 8 is provided in the upper case 2 for partitioning a primary side flow path 6 and a secondary side flow path 7, and the partition wall 8 has a primary side flow path 6 and a secondary side flow path. A communication port 9 that communicates with the communication port 7 is provided. The primary side flow passage 6 communicates with the gas inlet 4, and the secondary side flow passage 7 has a distribution valve mechanism 11 for distributing gas to a measuring chamber 10 provided in the lower case 3, a large elbow metal, A crank mechanism 12 made of a small elbow is provided.

Further, a shutoff valve 13 is provided opposite to the communication port 9 provided in the partition wall 8 so as to shut off the communication port 9 in an emergency. The shutoff valve 13 is
It comprises a valve seat 14 provided around the communication port 9 and a self-holding solenoid 15. The self-holding solenoid 15 is covered by a cover 16 fixed to the upper case 2.

The gas meter main body 1 is formed by, for example, aluminum die-casting. On the front surface of the gas meter main body 1, a character wheel type counter 17 is provided in cooperation with the crank mechanism 12 to accumulate and support a gas flow rate. The counter 17 is covered by a counter cover 19 having a glass window 18. The counter cover 19 is fixed to the gas meter main body 1 by fixing screws 20 provided at four corners on the front surface.

The counter cover 19 is, as shown in FIG.
For example, it is formed by aluminum die-casting, and a concave portion 22 for accommodating the head 21 of the fixing screw 20 is provided in the lower right corner of the front surface. This recess 22 has a head 21
And a rectangular concave portion 24 provided around the circular concave portion 23. The rectangular concave portion 24 is fitted with a rectangular sealing lid 25 to be described later. It has become.

A flange 21a is provided integrally with the head 21 of the fixing screw 20, and an engagement receiving portion 21b is formed. Further, the sealing lid 25 is formed of a synthetic resin material, and a pair of upper and lower engaging claws 26 are integrally provided on the back surface thereof. The engaging claw 26 includes an arcuate leg 26a facing each other and a claw 26b protruding from the tip of the leg 26a in a direction facing each other. And the claw portion 26b is
The elastic receiving portion 21b is elastically engaged with the engaging receiving portion 21b. Then, the claw portion 26b is engaged with the engagement receiving portion 21 of the flange portion 21a.
b, the sealing lid 25 is fitted tightly into the rectangular recess 24 of the recess 23 so as to close the recess 23.

A notch 27 is provided on the front surface of the counter cover 19 facing the upper edge of the sealing lid 25,
The tool 28 can be inserted when the sealing lid 25 is torn open. In addition, on the surface of the sealing lid 25, characters 29 indicating the expiration date (for example, February 2005)
Is engraved.

Next, the operation of the gas meter configured as described above will be described. The counter cover 19 is fixed to the gas meter main body 1 by fixing screws 20 provided at the four corners.
The head 21 of the lower right fixing screw 20 on the front surface of the counter cover 19 is housed in the recess 22.

When the sealing lid 25 is positioned in the recess 22 and the sealing lid 25 is pushed toward the head 21, the claw 26 b of the engaging claw 26 rides over the flange 21 a of the head 21 to receive the engagement. The sealing lid 25 is elastically engaged with the portion 21b, and the sealing lid 25 is tightly fitted to the rectangular concave portion 24 of the concave portion 23 to close the concave portion 23.

Therefore, the sealing cover 25 can be easily attached to the counter cover 19, and in the attached state, the sealing cover 25 can be integrated with the counter cover 19. Further, when the seal expiration date is reached and the sealing lid 25 is to be removed, a tool 28 is inserted into the notch 27 and the sealing lid 25 is removed.
When the upper edge portion is pulled apart toward the user, the claw portion 26b of the engagement claw 26 is broken, the engagement with the fixing screw 20 is released, and the sealing cover 25 can be removed from the counter cover 19. Therefore, the sealing lid 25 can be easily removed.

In the embodiment, the sealing cover 2 is used.
Although the case of engraving the year / month character 29 indicating the test expiration date on 5 has been described, the present invention can also be used for engraving a standard conformity inscription.

[0022]

As described above, according to the present invention, since the engaging claw is provided integrally with the sealing lid, the engaging claw is positioned on the head of the fixing screw and is pushed in by a finger or the like. Then, the engaging claw is elastically engaged with the head of the fixing screw, and the sealing cover is fixed by the counter cover. In addition, when the seal expiration date is reached and the seal lid is pryed apart, the engagement claws are broken, and the seal lid is removed.

Therefore, the sealing lid can be easily and securely attached to the counter cover, and in the state where the sealing lid is mounted, the sealing lid can be integrated with the counter cover. In addition, when the sealing lid is removed after the expiration of the certification , inserting a tool into the notch and prying it will break the engaging claw and release the engagement with the fixing screw, making it easy to remove the sealing lid. There is an effect that can be performed.

[Brief description of the drawings]

FIGS. 1A and 1B are a front view and a cross-sectional view showing a mounting structure of a sealing lid according to an embodiment of the present invention.

FIG. 2 is a vertical side view of the gas meter of the embodiment.

FIG. 3 is a front view and a side view showing a conventional sealing lead mounting structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Gas meter main body, 17 ... Counter, 19 ... Counter cover, 20 ... Fixing screw, 21 ... Head, 22 ... Concave part,
25: sealing lid, 26: engaging claw.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yasunobu Sato 4-26-17-305, Tokumaru, Itabashi-ku, Tokyo (56) References JP-A-6-258116 (JP, A) JP-A-3-94575 ( JP, U) JP 7-7688 (JP, U) JP 56-42501 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01F 1/00-9/02

Claims (4)

(57) [Claims] 1. A gas meter in which a counter for instructing the integration of a gas flow rate is provided in a part of a gas meter main body and the counter is covered by a counter cover fixed to the gas meter main body by fixing screws, provided recessed portion of the head is housed, as well as tightly closed by sealing lid openings having engaging claws that are engaging fixed relative to the head of the fixing screw of the recessed portion, the recessed The counsel near the part
Insert the tool when prying the sealing lid
A gask meter, wherein a notch that can be locked is provided on the back side of the sealing lid . 2. The gas meter according to claim 1, wherein a head portion of the fixing screw is provided with a flange portion with which the engaging claw is engaged. 3. The gas meter according to claim 1, wherein the sealing cover is formed of a synthetic resin, and the engaging claw is provided integrally. 4. The gas meter according to claim 1, wherein the engaging claw of the sealing lid is elastically engaged by pushing the fixing screw against the head, and is broken and removed by a prying operation of the sealing lid. .