JP3136136B2 - Gas meter manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a gas meter having a shut-off valve that opens when an abnormality occurs in a housing and shuts off a gas flow path.

[0002]

2. Description of the Related Art FIG. 58 is a sectional view showing a gas meter 704 provided with a conventional one-way shut-off valve 706. Gas meter 7 for measuring gas usage in gas consuming equipment
04, when an earthquake occurs to ensure safety,
Alternatively, a unidirectional shutoff valve 706 is provided to shut off the gas flow path when an abnormality such as an excessive flow rate or excessive pressure of the gas flowing through the gas meter 704 occurs. The unidirectional shutoff valve 706 is driven by the electromagnetic solenoid 730, and the unidirectional shutoff valve control means 725 shuts off the gas flow path in response to a sensor that detects an abnormality. Insertion hole 713
Is inserted in the gas flow path, and the valve body 707 of the unidirectional shut-off valve 706 is seated in the insertion hole 713 to shut off the gas flow path. The gas meter 704 is provided with a return operation means for pushing back the valve body 707 of the unidirectional shutoff valve 706 and opening the gas flow path again.
The return operation means is mounted in a mounting hole 712 formed integrally with the housing 709 of the gas meter 704, and is provided with a return operation button 714 protruding from the housing 709.
And an operating member 716 that fits into the insertion hole 713. The operating member 716 has a short cylindrical shape with a bottom, and has a gas passage hole 719 formed at the bottom thereof.

In order to return the gas meter 704 whose gas flow path has been blocked by the one-way shut-off valve 706, the operator directly pushes the return operation button 714 so that the one-way shut-off valve 706 is operated via the operating member 716. Valve body 707
To open the gas flow path.

A gas meter 804 using a bidirectional shutoff valve 806 is provided separately from a gas meter 704 equipped with such a unidirectional shutoff valve 706, and FIG. 59 is a sectional view thereof. The two-way shut-off valve 706 is the same as the one-way shut-off valve 706 described above.
Unlike this, the electromagnetic solenoid 830 can electrically perform not only the operation of shutting off the gas flow path but also the operation of opening. The opening operation of the two-way shutoff valve 806 is performed by the gas meter 8.
Operation button 81 of the electric switch provided on the power supply
4 is pressed, and the two-way shut-off valve 806 is returned by the electric signal.

A gas meter 804 equipped with such a two-way shut-off valve 806 is used as a gas meter which can be remotely controlled through a communication line, and a monitoring center provided at a remote place collects gas-related information such as gas consumption. In addition to monitoring, when the gas flow path is interrupted such as when an earthquake occurs, control is performed to return the bidirectional shutoff valve 806 and open the gas flow path after confirming safety at the monitoring center. In the gas meter 806 equipped with the bidirectional shutoff valve 806,
Only when the abnormality is eliminated by the built-in bidirectional shutoff valve control means 825, the bidirectional shutoff valve 8 is
Since 06 can be returned, high security can be ensured.

[0006]

Most of the gas meters currently used are equipped with a unidirectional shut-off valve 706, and the gas meter 70 equipped with the unidirectional shut-off valve 706 is overwhelmingly used.
4 to a gas meter 804 equipped with a two-way shut-off valve 806
Is gradually transitioning to. In particular, since the gas meter needs to be extensively inspected and repaired every ten years, it is desirable to replace the gas meter 704 with the unidirectional shutoff valve 706 with the gas meter 804 with the bidirectional shutoff valve 806 at this time. It is rare.

[0007] The unidirectional shutoff valve 706 is replaced with a bidirectional shutoff valve 806.
When replacing the gas meter, there are many reusable members in the gas meter, and it is particularly desired to reuse the housing. However, as can be seen by comparing FIGS. 58 and 59, the gas meter 704 equipped with the one-way shut-off valve 706 and the gas meter 804 equipped with the two-way shut-off valve 806 have different housing shapes. It is difficult to reuse without it.

It is an object of the present invention to provide a method of manufacturing a gas meter having a two-way shut-off valve using an existing gas meter having a one-way shut-off valve.

[0009]

According to the present invention, there is provided a unidirectional shut-off valve having a housing, a valve body provided in the housing, and shutting off a gas flow path in response to an abnormal signal. A partition formed integrally with the housing, interposed in the gas flow path and having an insertion hole, an operating member that is displaceably mounted in the insertion hole of the partition, and mounted in the mounting hole formed in the housing. A gas meter including a return operation button that is provided to protrude and pushes back a valve body through an operation member to open a gas flow path when pressed, and a unidirectional shut-off valve control unit that outputs an abnormal signal. A two-way shut-off valve having a valve body that closes the gas passage by closing the insertion hole of the partition in response to the abnormal signal, and opens the gas passage in response to the return signal; Attached to the mounting hole, Has a work member and the permanent magnet pieces,
An operation means for displacing the permanent magnet piece by a return operation of the operation member by the operator; and a return operation switch mounted in the housing and having a switching element for switching a switching mode by a change in a magnetic field due to the displacement of the permanent magnet piece. , A control means for a two-way shut-off valve for outputting an abnormal signal and a return signal, a one-way shut-off valve, a control means for the one-way shut-off valve and an operating member are removed from the housing, and a return button is removed from the mounting hole of the housing. A two-way shut-off valve and a control means for the two-way shut-off valve are mounted on the housing, the switching element of the return operation switch is electrically connected to the two-way shut-off valve control means, and the operation means for the return operation switch is mounted on the mounting hole of the housing. A method for manufacturing a gas meter, wherein the gas meter is manufactured by attaching a gas meter.

According to the present invention, the one-way shut-off valve, the one-way shut-off control means and the operating member are removed from the existing gas meter housing having the one-way shut-off valve mounted in the housing. By mounting the control means for the two-way shut-off valve and the return operation switch, a two-way shut-off valve which is safer and can be remotely operated is mounted on the existing gas meter housing instead of the one-way shut-off valve. Can be. In this way, a gas meter equipped with a two-way shut-off valve can be manufactured using the existing gas meter housing. Costs can be significantly reduced.

When a two-way shut-off valve is mounted on an existing gas meter housing in place of a one-way shut-off valve, the insertion hole of the partition wall on which the operating member is mounted is used as a valve hole for the two-way shut-off valve. . As a result, it is not necessary to newly form a valve hole closed by the valve body in the housing, and the housing of the existing gas meter can be used as it is without largely modifying the housing.

[0012]

According to the present invention, a mounting hole for mounting a reset operation button for resetting the unidirectional shut-off valve is formed in the housing of the existing gas meter equipped with the unidirectional shut-off valve.

[0014]

According to the present invention, when the two-way shut-off valve is restored, the operator performs a predetermined restoring operation by pressing or angularly displacing the operating member mounted in the mounting hole of the housing, thereby performing the permanent magnet piece. Is displaced. Then, the switching mode of the switching element mounted in the housing is switched according to the displacement of the permanent magnet piece. When the switching mode is switched, the control means for the bidirectional shutoff valve provided in the housing outputs a return signal, and in response to the return signal, the bidirectional shutoff valve opens to open the gas flow path. Return.

Since the one-way shutoff valve is provided facing the gas flow path, a return operation button for pushing back the valve element of the one-way shutoff valve is also disposed facing the gas flow path, and the return operation button is mounted. The mounting hole to be formed is also formed facing the gas flow path.
On the other hand, the control means is disposed in a control chamber communicating with the atmosphere, and is separated from the gas flow path by a partition.

When an operation switch for a two-way valve is provided in the mounting hole of the return operation button, it is necessary to connect the operation switch and the operation means by an electric cable. It is necessary to form a hole and seal the control partition between them. On the other hand, in the present invention, for example, the operating means and the permanent magnet piece are provided on the gas flow path side, and the switching element is provided on the control chamber side, so that the gas flow path and the control chamber do not communicate with each other,
The return operation of the bidirectional shutoff valve can be performed by the operation member mounted in the conventional mounting hole.

According to a second aspect of the present invention, the operating means has an operating member mounted in the mounting hole so as to be displaceable in the axial direction, and the permanent magnet piece is adapted to be displaced in the axial direction of the operating member. In conjunction therewith, the switching element is angularly displaced around the axis of the operation member, and the switching element is mounted in the housing so as to face a movement path when the permanent magnet piece is angularly displaced, and displaces the operation member in the axial direction as the return operation. It is characterized by the following.

According to the present invention, the permanent magnet piece is angularly displaced in conjunction with the axial displacement of the operating member by the operator's return operation, so that the switching of the area where the switching element is provided changes. , The switching mode of the switching element is switched. In order to allow such angular displacement of the permanent magnet pieces, it is not necessary to secure a large space in the depth direction of the gas meter housing, that is, in the axial direction of the operation member. Accordingly, when the bidirectional shutoff valve is mounted on an existing gas meter, it is not necessary to largely change the configuration near the permanent magnet piece disposed in the housing. Thus, without major modification of the existing gas meter,
By mounting the bidirectional shutoff valve on the existing gas meter, the bidirectional shutoff valve that is easily and reliably closed when the occurrence of the abnormality is eliminated can be returned to the open state.

In addition, by linearly displacing the operating member in the axial direction, the permanent magnet piece can be angularly displaced and greatly displaced. Therefore, even if the space occupied by the operating member in the axial direction is small, the area where the switching element is provided can be reduced. The change in the magnetic field can be increased. Therefore, by displacing the operating member in the axial direction as the return operation of the operating means and greatly changing the magnetic field, it is possible to reliably switch the switching mode of the switching element and to reliably output the return signal from the control means to the shut-off valve. Thus, the opening operation of the bidirectional shutoff valve is reliably performed.

According to a third aspect of the present invention, the operating member is mounted on the mounting hole so as to be displaceable in an axial direction, the permanent magnet piece is fixedly mounted on the operating member, and the switching element is The operation member is mounted in the housing facing the moving path of the permanent magnet piece, and the operation member is displaced in the axial direction as the return operation.

According to the present invention, the operating member is displaced in the axial direction by pushing or pulling the operating member, and the permanent magnet piece fixedly attached to the operating member is linearly displaced. The switching mode of the switching element is switched by the linear displacement of the permanent magnet piece, and the bidirectional shutoff valve opens to return. As described above, in the present invention, only the permanent magnet piece is fixedly attached to the operation member, and the configuration of the operation member can be simplified.

According to a fourth aspect of the present invention, the operating member is mounted in the mounting hole so as to be angularly displaceable about an axis.
The permanent magnet piece is fixedly attached to an operation member, and the switching element is attached to a housing facing a movement path of the permanent magnet piece, and the operation member is angularly displaced around its axis as the return operation. Features.

According to the present invention, the bidirectional shut-off valve is opened by switching the switching mode of the switching element by angularly displacing the operating member to angularly displace the permanent magnet piece fixedly attached to the operating member. Then the gas meter returns. As described above, in the present invention, since the permanent magnet piece is configured to be fixedly attached to the operation member, the configuration of the operation means can be simplified.

Further, since the permanent magnet piece can be largely angularly displaced by angularly displacing the operating member, even if the space occupied by the operating member in the axial direction is small, the change in the magnetic field in the area where the switching element is provided is large. can do. Therefore, the operation means can surely change the switching mode of the switching element, and can reliably output the return signal to the control means, so that the opening operation of the bidirectional shutoff valve is reliably performed.

According to a fifth aspect of the present invention, the switching element is surrounded by a magnetic shielding member made of a ferromagnetic material and having an opening at a portion facing the moving path of the permanent magnet piece. .

According to the present invention, the switching element is surrounded by a magnetic shielding member made of a ferromagnetic material, and the magnetic shielding member forms an opening facing a moving path of the permanent magnet piece. The switching element changes its switching mode only in response to a change in the magnetic field on the side facing the movement path of the permanent magnet piece, and thus to a change in the magnetic field due to the displacement of the permanent magnet piece.

When the gas meter is started to be used for the first time, the control means is started by switching the switching mode of the starting switching element provided in the control means by applying a magnetic field by approaching a magnet from the outside. At this time, the shutoff valve is simultaneously opened to open the gas flow path. When the gas meter is not used for a long time, in order to prevent the gas meter from being used unintendedly and to prevent the battery from being consumed, the function of the control means is stopped by operating the magnet in the same manner as when starting to use the gas meter. At this time, the shutoff valve is also closed at the same time. At this time, the indicator light provided on the gas meter is turned on as a signal that the control means has been activated or the function has been stopped,
The light turns off after about 40 seconds. Also, this indicator light blinks so that the shut-off valve is closed and the gas flow path is in the shut-off state so that it can be recognized from the outside. At this time, the indicator light continues to flash until the shut-off valve is restored. Such an indicator light is turned on for about 5 seconds when the shut-off valve is returned by the return operation, and then turned off.

As described above, the switching mode is switched and returned by the change in the magnetic field of the switching element. For example, when a magnet is externally actuated to stop the function of the gas meter, the function stop provided in the control means is stopped. There is a possibility that the switching mode of the switching element for the shut-off valve is not switched and the switching mode of the switching element for the shut-off valve is switched, so that the function of the control means does not stop and the shut-off valve remains open. That is, when the switching mode of the switching element for the shut-off valve is switched and the indicator light is turned on for about 5 seconds, the operator may mistakenly think that the function of the control means is stopped and the indicator light is turned on. . When the function is stopped, the light turns off after about 40 seconds, so it is possible to confirm that the function is stopped.However, the function stops after the indicator light is turned on without the operator confirming that the function is stopped. If it is determined that the operation has been performed and the user goes to the next work place, the gas meter may be used unexpectedly, and the battery may be significantly consumed.

On the other hand, according to the present invention, the switching element of the two-way shut-off valve is shielded from the magnetism other than the permanent magnet piece of the operating means by the magnetic shielding member. The shut-off valve returns
It is possible to prevent erroneous recognition as described above.

By changing the opening area of such a magnetic shielding member, the intensity of the magnetic field acting on the switching element can be adjusted. For example, when the distance between the moving path of the permanent magnet piece and the switching element is small, such as in a relatively small gas meter, the magnetic force of the permanent magnet piece is too large, and the magnetic field acting on the switching element is changed. Although the problem that the switching mode of the switching element does not change may occur, the switching mode of the switching element can be reliably switched by reducing the opening area and reducing the strength of the magnetic field acting on the switching element.

Further, a change in the magnetic field other than when the operator returns the operation means, for example, a mischief such as intentionally bringing a magnet from the outside, prevents the return operation of the shut-off valve, and the gas flow path is prevented. The open state is prevented.

[0033]

[0034]

Such a gas meter is provided with a shutoff valve that shuts off the gas flow path in response to the abnormal signal and opens the gas flow path in response to the return signal. As a result, only when the abnormal state is resolved, the return signal is output from the control means to the shut-off valve so that the gas flow path can be opened, and high safety can be secured. Further, when such a plurality of gas meters are continuously communicable with a monitoring center provided in a remote place, the gas-related information of each gas meter from the monitoring center can be confirmed, and the operation of opening / closing the shut-off valve can be remotely controlled. Can be done by operation. According to a sixth aspect of the present invention, there is provided a unidirectional shut-off valve having a housing, a valve body provided in the housing, and shutting off a gas flow path in response to an abnormal signal, A partition wall having an insertion hole, and an operating member that is displaceably mounted in the insertion hole of the partition wall,
A return operation button that is provided to protrude from the housing and is pushed back to open the gas flow path by pushing back the valve body through the operating member, and a unidirectional shutoff valve control unit that outputs an abnormal signal. A gas meter, and a bidirectional shutoff valve having a valve element that closes the gas passage by closing the insertion hole of the partition in response to the abnormal signal, and opens the gas passage in response to the return signal, A control means for a bidirectional shutoff valve for outputting an abnormal signal and a return signal, and a switching element whose switching mode is switched by a change in a magnetic field are prepared. Then, the switching element is electrically connected to the control means for the two-way shut-off valve, and the two-way shut-off valve and the control means for the two-way shut-off valve are mounted in the housing to manufacture a gas meter. By displacing the permanent magnet piece outside the housing, the magnetic field in the vicinity of the switching element is changed to switch the switching mode, and a return signal is output from the control means for the bidirectional shutoff valve. This is a method for manufacturing a gas meter. According to the present invention, the switching element whose switching mode is switched by the change of the magnetic field is connected to the control means for the bidirectional shutoff valve, and the control means is mounted in the housing together with the bidirectional shutoff valve. To reset the gas meter,
An operator displaces the permanent magnet outside the housing. Then, the magnetic field near the switching element in the housing changes and the switching mode of the switching element switches,
A return signal is input to the bidirectional shutoff valve, and the gas meter returns. In this manner, a two-way shut-off valve gas meter can be manufactured using the housing of the one-way shut-off valve gas meter. According to a seventh aspect of the present invention, there is provided a one-way shut-off valve having a housing, a valve body provided in the housing, and shutting off a gas flow path in response to an abnormal signal; A partition wall having an insertion hole, an operating member that is displaceably mounted in the insertion hole of the partition wall, and a valve body that is provided so as to protrude from the housing and is operated by being pressed to form a valve body via the operating member. A gas meter including a return operation button for pushing back to open a gas flow path and a control means for a unidirectional shut-off valve for outputting an abnormal signal, and a gas flow by closing an insertion hole of a partition in response to the abnormal signal; A two-way shut-off valve having a valve body for shutting off a passage and opening a gas flow path in response to a return signal, a control means for the two-way shut-off valve for outputting an abnormal signal and a return signal, and for the two-way shut-off valve Electrically connected to the control means , A push button switch for outputting a return signal from the control means for the bidirectional shutoff valve by being pressed is prepared, and the unidirectional shutoff valve, the control means for the unidirectional shutoff valve and the operating member are removed from the housing, and the housing is removed. Mounting the two-way shut-off valve and the control means for the two-way shut-off valve, electrically connecting the push-button switch to the control means for the two-way shut-off valve, mounting the push-button switch on the housing, or incorporating the push-button switch in the housing; And a push button switch capable of operating the push button switch, or a push button switch provided outside the housing to manufacture the gas meter. According to the invention, a push button switch is connected to the control means for the bidirectional shut-off valve, which is attached to the housing for the unidirectional shut-off valve. Therefore, when the operator presses the push button, a return signal is input to the bidirectional shutoff valve, and the gas meter is returned. The present invention according to claim 8 provides a unidirectional shut-off valve having a housing, a valve body provided in the housing, and shutting off a gas flow path in response to an abnormal signal; A partition wall having an insertion hole, an operating member that is displaceably mounted in the insertion hole of the partition wall, and a valve body that is provided so as to protrude from the housing and is operated by being pressed to form a valve body via the operating member. A gas meter including a return operation button for pushing back to open a gas flow path and a control means for a unidirectional shut-off valve for outputting an abnormal signal, and a gas flow by closing an insertion hole of a partition in response to the abnormal signal; A two-way shut-off valve having a valve body for shutting off a passage and opening a gas flow path in response to a return signal, and a switch having a control means and a string for a two-way shut-off valve for outputting an abnormal signal and a return signal; Prepare the house Unidirectional shut-off valve from the grayed,
The control means for the unidirectional shutoff valve and the operating member are removed, the bidirectional shutoff valve and the control means for the bidirectional shutoff valve are mounted on the housing, and the switch is electrically connected to the control means for the bidirectional shutoff valve. A method for manufacturing a gas meter, wherein the string is drawn out of the housing to manufacture a gas meter, and the string is pulled to change a switch to output a return signal from the control means for the bidirectional shutoff valve. is there. According to the present invention, the switch, which switches by pulling the string, is attached to the control means for the bidirectional shutoff valve, and is attached to the housing for the unidirectional shutoff valve. And pull the string out of the housing,
When returning the gas meter, pull the string. Then, the switch is switched, a return signal is input to the bidirectional shutoff valve, and the gas meter returns.

[0036]

FIG. 1 is a sectional view showing a gas meter 4 manufactured by a gas meter manufacturing method according to an embodiment of the present invention. FIG. 2 is a front view of the gas meter 4, and FIG. 3 is a right side view of the gas meter 4 of FIG. FIG. 1 is a horizontal cross-sectional view of the gas meter 4 taken along the line II in FIG. Gas meter 4
Is a gas meter equipped with the bidirectional shutoff valve 6 manufactured using the housing 709 of the existing gas meter 704 equipped with the unidirectional shutoff valve 706 shown in FIG. In such a gas meter 4, a unidirectional shutoff valve 706, a unidirectional shutoff valve control unit 725, a return operation button 714, and an operating member 716 are removed from a housing 709 of an existing gas meter 704, and a two-way shutoff valve is mounted on the housing 709. 6. It is manufactured by mounting the control means 73 for the bidirectional shutoff valve and the return operation switch 45. Thus, the housing 709 of the existing gas meter 706 is provided.
In addition, in place of the unidirectional shut-off valve 706, the safety is higher,
In addition, a bidirectional shut-off valve 6 that can be operated remotely can be mounted, and the housing 709 of the existing gas meter 704 can be mounted.
The gas meter 4 on which the bidirectional shut-off valve is mounted can be manufactured by utilizing the above. Therefore, the manufacturing cost can be significantly reduced as compared with the case where a gas meter on which the bidirectional shutoff valve 6 is mounted is manufactured in advance.

Such a gas meter 4 is interposed in a gas supply pipe for supplying a gas such as natural gas to a gas consuming room provided in a factory or a general house. The quantity is weighed. The housing 709 of the gas meter 4 has a lower case 12 and an upper case 14. In the upper part of the upper case 14, there are provided a supply hole 16 supplied from a gas supply pipe and a discharge hole 18 for discharging the gas flowing through the gas flow path in the gas meter 4 to the gas supply pipe. Lower case 1
2 has a built-in measuring means for measuring an amount of gas supplied to the gas consuming chamber via a gas meter 4 interposed in a gas supply pipe which is a gas usage amount in the gas consuming chamber.
The metering means of the gas meter 4, which is a membrane gas meter, has a metering membrane interposed in the gas flow path between the supply port 16 and the discharge port 18, and the metering membrane flows through the gas flow path. It reciprocates according to the amount of gas passed.

Further, the upper case 14 is provided with an integration display section 20 for displaying, by a counter, the amount of gas flowing through the gas flow path in the gas meter 4, that is, the integrated value of the gas usage, by protruding from the front surface. I have. The reciprocating motion of the measuring membrane is
Rotational motion is converted by a crank mechanism provided in the upper case 14, and the integrated value of gas usage is displayed on the counter of the integrated display unit 20.

A partition 715 is formed in the upper case 14 integrally with the upper case 14 and is interposed in the gas flow path. The partition 715 provides the supply port 16 and the lower case 12. The gas passage communicating with the measuring means is separated into a first inlet gas passage 22 and a second inlet gas passage 24. The partition 715 has an existing gas meter 704.
, An operating member 716 (see FIG. 58) for pushing back the valve body 707 to the one-way shut-off valve 706 to return the valve to the open state is formed, and in the gas meter 4, the Open the hole 713 with the two-way shut-off valve 6
For use as the valve hole 28 of Thus, there is no need to newly form a valve hole in the housing 709, and the housing 709 can be used without any major modification. Further, in the upper case 14, an outlet gas flow path 26 that connects the measuring means and the discharge hole 18 is formed.

The upper case 14 is provided with the bidirectional shutoff valve 6 for shutting off the gas flow path in the gas meter 4 as described above. When an earthquake occurs, the two-way shut-off valve 6
When an abnormality such as when the flowing gas in the gas meter 4 becomes an excessive flow rate or an excessive pressure occurs, the gas flow path is shut off. The two-way shut-off valve 6 is, for example, an electromagnetic solenoid valve, and has a valve body 36. The valve body 36 has a first inlet gas passage 22 and a second inlet gas passage 22 that constitute a part of a gas passage. Valve hole 28 formed in partition wall 715 separating channel 24
The gas flow path is shut off by sitting on a valve seat 34 surrounding the valve seat 34, and is separated from the valve seat 34 to open the gas flow path. The valve body 36 is provided with the electromagnetic solenoid 3 in the coil case 32.
When the valve 3 is excited, it is driven bidirectionally in a valve closing direction in which the valve body 36 is seated on the valve seat 34 and in a valve opening direction in which the valve body 36 is separated from the valve seat 34. As described above, the bidirectional shutoff valve 6 functions as a bidirectional valve that performs the valve closing operation and the valve opening operation by the electromagnetic solenoid 33.

In the upper case 14, a control partition 31 formed integrally with the upper case 14 is formed.
1, a control chamber 29 is formed in the upper case 14 and is separated from the flow path and communicates with the atmosphere. A circuit board 30 is provided in the control room 29. This circuit board 30
Is provided in the control room 29 instead of the one-way shut-off valve control means 725, and is electrically connected to the two-way shut-off valve control means 37 composed of, for example, a microcomputer. Electromagnetic solenoid 3 that drives the valve element of bidirectional shutoff valve 6
3 is electrically connected to the circuit board 30 in the control room 29, the excitation state is controlled by the control means 37, and responds to a signal from the control means 37, that is, an abnormal signal described later, and a return operation of the return operation means 45. The valve body 36 is driven in the valve closing direction or the valve opening direction by the output return signal. Thus, the shutoff valve 6 is subjected to the valve closing operation and the valve opening operation by the control means 37.

In the upper case 12, as means for detecting the above-described abnormality, a seismic sensor 38 for detecting an earthquake, a flow detector 40 for detecting an excessive flow path, and a pressure detector 42 for detecting an excessive pressure are provided. Are provided. These devices 38-
Reference numeral 42 is electrically connected to the circuit board 30, and outputs detection signals to and from the control unit 37 via the circuit board 30.
The control means 37 outputs an abnormal signal to the shutoff valve 6 based on the electric signals from the devices 38 to 42 when an abnormality occurs, thereby driving the valve body 36 of the shutoff valve 6 in the valve closing direction. The electromagnetic solenoid 33 is excited in the valve body 3
The valve hole 28 is closed by the seat 6 being seated on the valve seat 34. As described above, when an abnormality occurs, the control means 37 closes the shutoff valve 6 based on the detection signals from the abnormality detectors 38 to 42, and the flow of the gas can be prevented by shutting off the gas flow path. Will be blocked.

The circuit board 30 has a shut-off valve 6 when an abnormality occurs.
An indicator light 39 is provided for indicating that the gas flow path is shut off when the valve is closed.
Is a display hole 35 formed in the front wall 48 of the housing 709.
It is provided facing the outside through. The indicator light 39
When the shut-off valve 6 is closed, it flashes, when the shut-off valve 6 is returned to the open state, and when the gas flow path is opened again, it is turned on for about 5 seconds and then turned off.

The circuit board 30 is provided with a start switching element 41 formed of a start switch adjacent to the indicator light 39. At the start of use of the gas meter 4, a magnet is approached from the outside of the housing 709 to change the magnetic field to change the switching mode of the startup switching element 41, and return the shutoff valve 6 to open the gas flow path. Thus, the control means 37 provided in the gas meter 4 is activated. When the gas meter 4 is not used for a long period of time, in order to prevent the gas meter 4 from being used unintentionally and to prevent the battery 43 provided on the circuit board 30 from being consumed, as in the case of starting use, The function of the control means 37 is stopped by changing the switching mode of the start switch element 41, and the shutoff valve 6 is closed to shut off the gas flow path. When the control means 37 starts or stops functioning in this way,
As a signal, the indicator light 39 is turned on, and is turned off after being turned on for about 40 seconds.

The gas meter 4 is provided with a return operation switch 45 for returning the shut-off state of the gas flow path by the two-way shut-off valve 6 to the open state. Such a return operation switch 45 is the same as the existing gas meter 704 shown in FIG.
After the return operation button 714 for returning the one-way shut-off valve 706 is removed from the mounting hole 712 formed in the front wall 48 of the housing 709, it is mounted in the mounting hole 712. The return operation switch 45 is attached to the mounting hole 7.
The operation means 46 mounted on the circuit board 12 and the circuit board 30 in the upper case 14 of the housing 710
And a switching element 44 electrically connected to the control means 37 through the control element 37. The operating means 46 includes the operating member 5
2 and a permanent magnet piece 50. By performing a predetermined return operation on the operation member 52, the permanent magnet piece 50
Is displaced. The switching element 44 has a configuration in which the switching mode changes according to the displacement of the permanent magnet piece 50 of the operation means 46.

The operating means 46 mounted in the mounting hole 712 of the housing 709 is provided at the upper left of the integrating display unit 20. The operating means 46 is provided so as to partially protrude into the second upper gas flow path 24. In relation to the operating means 46 provided at such a position, the switching element 44 is disposed on the circuit board 30 in the control room 29 at a position close to the operating means 46. Such operating means 46
And the switching element 44 are separated by the control partition 31.

The switching element 44 is, for example, a reed switch, and has a structure in which a pair of reeds made of a ferromagnetic material is sealed in a glass tube together with an inert gas. This switching element 44
The switching mode changes due to the change in the magnetic field in the region where the is provided. In the switching element 44 of the present embodiment, a certain lead piece that is normally separated is magnetized and adhered when the magnet approaches, and is switched from the off state to the on state by conducting electricity. The control means 37 electrically connected to the switching element 44 recognizes the rising of the pulse caused by the switching element 44 being turned on from the off state as a signal for returning the shutoff valve 6, and 6 to output a return signal.

The switching element 44 is surrounded by a magnetic shielding member 47 made of a ferromagnetic material. An opening is formed in such a magnetic shielding member 47 so as to face the movement path of the permanent magnet piece 50. As a result, the switching element 44 changes its switching mode in response to a change in the magnetic field on the side facing the movement path of the permanent magnet piece 50, that is, a change in the magnetic field due to the displacement of the permanent magnet piece, and a change in the magnetic field in other directions. Not affected.

The operating means 46 is provided in the mounting hole 712 of the housing 709 so as to protrude from the front wall 48, and has an operating member 52 whose axial direction is perpendicular to the front wall 48. Is provided so as to be displaceable in the direction of the axis L1. Further, the operating means 46 causes the operating member 52 to be linearly displaced in the axial direction L1.
2 has a permanent magnet piece 50 that is angularly displaced about the axis L1 of the operation member 52 in conjunction with the linear displacement of the operation member 52. By pressing the operating member 52 in the control operation direction A1 which is one of the axial directions as the return operation of the shut-off valve 6 in the operating means 46, the permanent magnet piece 50 is moved in the direction of the axis L1 when viewed from the front of the gas meter 4. It is angularly displaced counterclockwise B1. The switching element 44 is disposed facing the movement path when the permanent magnet piece 50 is angularly displaced as described above, and is turned off by the angular displacement of the permanent magnet piece 50 and proximity to the switching element 44. It turns on.

Gas meter 4 on which bidirectional shutoff valve 6 is mounted
, The operating member 52 of the operating means 46 is pressed in the return operation direction A1 so that the switching element 44 is pressed.
The switching mode changes from the off state to the on state,
The control means 37 outputs a return signal to the shut-off valve 6 based on the change of the switching mode of the switching element 44, and the shut-off valve 6 performs a valve opening operation in response to the return signal to open the gas flow path. Therefore, as a return operation of the shut-off valve 6 when the abnormality is resolved, by pressing the operating member 52 of the operating means 46, the shut-off valve 6 for closing the gas flow path is opened and the gas flow path 5 is opened. can do.

As described above, in the gas meter 4 manufactured using the housing 709 of the existing gas meter 704 shown in FIG. Installing. This eliminates the need to newly form a mounting hole for mounting the return operation switch in the housing 709, so that the return operation button 71
There is no need to close the mounting hole 712 in which the hole 4 has been mounted. As described above, the unidirectional shut-off valve 706 can be easily replaced with the bidirectional shut-off valve 6 without changing the structure of the housing 709 such as making a hole in the housing 709.

FIG. 4 is a sectional view showing the operation means 46 of the return operation switch 45 in the gas meter 4, and FIG. 5 is an exploded perspective view of the operation means 46. The operating means 46 is provided in the gas meter 4 by being mounted in a mounting hole 712 formed in the front wall 48 of the housing 709 above the integrating display unit 20 and at a position on the left side in the width direction of the gas meter 4. Such operating means 46 is covered from the outside by a cap 56, and the operating means 46
It can be prevented that rain, dust, etc. act on the surface and deteriorate. When resetting the shut-off valve 6 when the abnormality is resolved,
After removing the cap 56, the operating member 5 is attached to the operating means 46.
2 is pressed. The operating means 46 includes a housing 709
The mounting member 58 screwed into the mounting hole 712 formed in the front wall 48, the guide tube 60 fitted on the same axis L1 inside the mounting member 58, and the inside of the mounting member 58 and the guide tube 60. And a return shaft 66 that is inserted on the same axis L1. A pair of opposing first guide grooves 62 are formed in the guide cylinder 60 in parallel with the axis L1.
When the guide piece 64 provided on the outer peripheral portion of the operation member 52 inserted into the inside of the guide cylinder 60 is fitted into the guide groove 62, the operation member 52 is guided by the guide groove 60 and moves in the direction of the axis L1. It is provided so as to be displaceable. Further mounting member 5
The holding member 61 is fitted on the same axis L <b> 1 on the outside of 8. A through hole 156 is formed in the holding member 61, and the operation member 52 is inserted through the through hole 63.

One end of the return shaft 66 protrudes from the mounting member 58 to the second inlet gas flow path 24 serving as a gas flow path in the housing 709, and has a holding member 72 for holding the permanent magnet piece 50. Has been fixed. A guide projection 70 that fits into a spiral second guide groove 68 formed on the inner periphery of the operation member 52 is provided on the outer periphery of the other end of the return shaft 66. Such a return shaft 66 is connected to the operation member 52.
Is pressed, and the return operation direction A1 which is one side in the direction of the axis L1.
The guide projection 70 is guided along the second guide groove 68 and is angularly displaced. by this,
When the operation member 52 is pressed in the return operation direction A1, the return shaft 66 is angularly displaced, and the permanent magnet piece 50 held by the holding member 70 is angularly displaced around the axis L1.

Mounting hole 71 formed in housing 709
2 includes a cylindrical peripheral wall 74,
A bottom part 7 formed at one end in the axial direction and connected to the peripheral wall 74.
6. Further, a flange 78 is provided on the peripheral wall 74, and a first external screw 88 is engraved on an outer peripheral portion on one axial end side of the flange 78. The mounting hole 712 of the housing 709 is provided with an internal screw 81,
The mounting member 58 extends from the outside of the housing 709 to the bottom 76.
Is screwed into the housing 709 and fixed. At this time, the flange 78 is
09 against the front wall 48 of the mounting member 58.
Is positioned. Further, a second outer screw 83 is engraved on the other end side of the flange 78 in the axial direction, and the pressing member 61 is screwed thereto. A shaft hole 82 is formed in the bottom portion 76, and the shaft hole 82 has a large diameter portion 84 at the other end in the axial direction of the peripheral wall 74 and a smaller diameter than the large diameter portion 84.
And a small-diameter portion 86 at one end in the axial direction, and a step portion 88 is formed between the large-diameter portion 84 and the small-diameter portion 86. The inner diameter of the peripheral wall 74 of the mounting member 58 is set to D1.

FIG. 6 is a front view showing the guide cylinder 60 of the operating means 46. FIG. 7 is a sectional view taken along the line VII of FIG.
FIG. 8 is a cross-sectional view as viewed from -VII, FIG. 8 is a bottom view of the guide tube of FIG. 6 as viewed from below, and FIG. 9 is an enlarged view of section IX of FIG. The guide cylinder 60 has one end in the axial direction inserted into the peripheral wall 74 of the mounting member 58 from the other end in the axial direction of the mounting member 58, and has one end in the axial direction of the guide cylinder 60 connected to the bottom of the mounting member 58. Abut on 76,
It is positioned and mounted in the axial direction. A pair of first guide grooves 62 extending in parallel to the axial direction are formed on the guide cylinder 60 so as to face each other, that is, are formed to be shifted by 180 ° in the circumferential direction.
The first guide groove 62 is open at the other axial end of the guide cylinder 60. The width of the first guide groove 62 is set to W1.

An annular projection 92 is formed on one end side of the guide cylinder 60 in the axial direction from the first guide groove 62 so as to extend all around the circumferential direction. The annular projection 92 is elastically deformed and fitted by the inner peripheral surface of the mounting member 58, and the guide cylinder 60 is attached to the mounting member 58.
Firmly fixed to

FIG. 10 is a front view of the return shaft 66 of the operating means 46, and FIG. 11 is a sectional view taken along the line XI of FIG.
13 is a cross-sectional view when viewed from XI. FIG. 12 is a plan view when the return shaft 66 in FIG. 10 is viewed from above, and FIG.
FIG. 14 is a cross-sectional view of the return shaft 66 of FIG. 9 when viewed along a section line XIII-XIII, and FIG. 14 is a bottom view of the return shaft 66 of FIG. 10 when viewed from below. The return shaft 66 has a small outer diameter portion 100 closest to one end in the axial direction and a small outer diameter portion 100.
A middle and outer diameter portion 98 larger than the large outer diameter portion 100 formed on the other end side in the axial direction, and a larger diameter than the middle inner diameter portion 98 formed on the other end side in the axial direction of the middle and outer diameter portion 98. Large outside diameter part 96
And At one end of the large outer diameter portion 96, the annular projection 100 is provided to extend in the entire circumferential direction. A pair of cylindrical guide protrusions 70 are provided at the other end in the axial direction of the large outer diameter portion 90 so as to be shifted from each other by 180 ° in the circumferential direction. It protrudes. The outer diameter of such a guide projection 70 is set to D3.

A first step portion 104 is formed between the annular projection 102 of the large outer diameter portion 96 and the middle outer diameter portion 98. A second stepped portion 106 is provided between the middle outer diameter portion 98 and the small outer diameter portion 100.
Are formed. An engagement groove 108 that opens outward in the radial direction is formed in a part of the other end in the axial direction of the small outer diameter portion 100 in the circumferential direction. Such an engagement groove 108 is formed by being cut out in a substantially rectangular parallelepiped shape.

The return shaft 66 has a spring hole 1 extending from the other end in the axial direction of the large outer diameter portion 96 to one end in the axial direction.
14 are formed. The spring hole 114 has a large-diameter portion 116 formed at the other axial end of the return shaft 66 and a large-diameter portion 1 formed at one axial end of the large-diameter portion 116.
And a small inner diameter portion 118 having a diameter smaller than 16. Between the large inner diameter portion 116 and the small inner diameter portion 118, a third
A step 122 is formed.

The return shaft 66 is inserted through the mounting member 58 and the guide cylinder 60, and one end in the axial direction is inserted through a shaft hole 82 formed in the bottom 76 of the mounting member 58. Mounting member 58
An O-ring 125 is fitted into the large-diameter portion 84 of the shaft hole 82. To the housing 709
The inside second gas passage 24 is airtightly partitioned from the outside.

A washer 126 is provided in the mounting member 58, and the inner hole of the washer 126 has a middle and outer diameter portion 9 of the return shaft 66.
8 is inserted. The washer 126 is provided on the bottom wall 7 of the mounting member 58.
6 to prevent displacement of the peripheral wall 74 in a direction toward one end in the axial direction. In this washer 126,
By mounting the first step portion 104 of the return shaft 66, the displacement of the return shaft 66 in the return operation direction A1 is prevented, and the return shaft 66 is positioned. Such a return shaft 66 is attached to the mounting member 5.
8 is supported so as to be angularly displaceable about the axis. When the return shaft 66 is angularly displaced, the washer 126 functions as a thrust bearing, preventing axial displacement of the return shaft 66 and smoothing the angular displacement operation of the return shaft 66.

Such a small outer diameter portion 100 of the return shaft 66
Is provided so as to protrude from the bottom portion 76 of the mounting member 58, and is a second part of a gas flow path in the housing 709.
It projects into the inlet gas flow path 24. The return spring 130 is inserted into the spring hole 114 of the return shaft 66, and one end is supported by the third step 122.

FIG. 15 is a front view of the operation member 52 of the operation means 46, FIG. 16 is a side view of the operation member 52 of FIG. 15, and FIG. 17 is a plan view of the operation member 52 of FIG. 18 is a cutting plane line XVIII-X of the operation member 52 of FIG.
FIG. 19 is a cross-sectional view as viewed from VIII, and FIG.
FIG. 20 is an enlarged view of one end in the axial direction of the operation member 52 of FIG. The operation member 52 is a substantially bottomed cylindrical member whose one end in the axial direction is open, and has a bottom wall 134 formed continuously with the cylindrical peripheral wall 130. The outer diameter of the peripheral wall 132 is D1
Selected as 1.

The outer peripheral portion at one end of the peripheral wall 132 is
A fitting portion 136 having an outer diameter D12 smaller than the outer diameter D11 of 32 is formed in which a retaining member 73 described later is fitted. An annular fitting concave groove 138 is formed in the fitting portion 136 in the circumferential direction. A guide surface 140 whose diameter is reduced toward the distal end is formed at the distal end of the fitting portion 136.
Further, the fitting portion 136 is provided at a step portion at one end of the peripheral wall 132.
Two semicircular locking recesses 141 that are 180 ° shifted in the circumferential direction
Is formed.

On the outer peripheral portion of the peripheral wall 132 of the operating member 52 near one end in the axial direction, a guide piece 64 projecting outward in the radial direction is provided at a position shifted by 180 ° in the circumferential direction. The width W10 of the guide piece 64 is equal to the first guide groove 6 of the guide piece 64.
2 is set slightly smaller than the width W1. In the inner peripheral portion of the peripheral wall 132, two helical second guide grooves 68 extending from one axial end to the other axial end are formed symmetrically about the axis. Such a second guide groove 68 is formed in a spiral shape that turns clockwise when viewed from the other end in the axial direction of the peripheral wall 132 toward one end in the axial direction, that is, when viewed in the pressing operation direction A1 of the operating member 52. Is formed. The second guide groove 68 is formed at an angle α with respect to the axial direction of the operation member 52, and the width W2 of the return shaft 66 is set slightly larger than the outer diameter D3 of the guide protrusion 70. .

FIG. 21 is an enlarged sectional view of the retaining member 73, FIG. 22 is a plan view of the retaining member 73 of FIG. 21, and FIG. 23 is a bottom view of the retaining member 73 of FIG. FIG. 24 shows the retaining member 73 of FIG.
It is sectional drawing seen from V-XXIV. The retaining member 73 is a substantially cylindrical member, and the outer diameter D6 is selected to be the same as the outer diameter D11 of the operation member 52. A shaft hole 143 is formed in the inner peripheral portion at one end in the axial direction of the retaining member 73.
The inner diameter D14 of the shaft hole 143 is selected to be slightly larger than the outer diameter of the large outer diameter portion 96 of the return shaft 66. A connecting portion 144 having an inner diameter D15 larger than the inner diameter D14 of the shaft hole 143 is formed in an inner peripheral portion of the shaft hole 143 on the other end side in the axial direction, and the inner diameter D15 of the connecting portion 144 is fitted to the operation member 52. The outer diameter D12 of the joint 136 is slightly larger than the outer diameter D12.
Further, the connecting portion 144 has an annular bulging portion 145 bulging inward in the radial direction formed in the circumferential direction, and an inner diameter D16 of the bulging portion 145 is formed by a fitting recess of the fitting portion 136 of the operation member 52. It is formed smaller than the outer diameter D13 of the portion where the groove 138 is formed.

At the other end of the retaining member 73 in the axial direction, two semicircular engaging projections 146 projecting in the axial direction are formed at positions shifted by 180 ° in the circumferential direction. The protrusions 146 are formed to face each other. In the retaining member 73, an axial guide groove 147 extending in the axial direction is formed at a circumferential position where the locking protrusion 146 is formed, and the width W <b> 3 of the axial guide groove 147 is It is selected to be slightly larger than the outer diameter D3 of the projection 70.

The operating member 52, the return shaft 66 and the return spring 130 are inserted into the guide cylinder 60 in a unitized state by the retaining member 73. Referring to FIG. 5, in order to unitize the operation member 52, the return shaft 66, and the return spring 130, first, the large diameter portion 96 of the return shaft 66 is inserted into the shaft hole 143 of the retaining member 73. At this time, the guide projection 70 provided on the large outer diameter portion 96 is
47 and inserted. The return shaft 6 in such a state
The return spring 130 is inserted into the sixth spring hole 114, and one end of the return spring 130 is supported by the third step 122. Next, the guide projection 70 of the return shaft 66 is connected to the second guide groove 6 of the operation member 52.
The operation member 52 is fitted into the large outer diameter portion 96 of the return shaft 66 so as to fit into the position 8. At this time, the second guide groove 6 of the operation member 52
8 is inclined and screwed into the operation member 52 while rotating the return shaft 66. The other end of the return spring 130 contacts the bottom 134 of the operating member 52, and the return shaft 6
6 and the operating member 52 become the return spring 130, and a spring force acts in a direction away from each other.

In this state, the connecting portion 144 of the retaining member 73 inserted through the large outer diameter portion 96 of the return shaft 66 is fitted into the fitting portion 136 of the operation member 52. At this time, the connecting part 1
44 is resiliently fitted into the fitting concave groove 138 of the fitting part 136, thereby preventing the retaining member 73 from being detached from the operation member 52.
By fitting the locking projection 146 of the retaining member 73 into the locking concave portion 141 of the operating member 52, the retaining member 73 is prevented from being angularly displaced around the axis with respect to the operating member 52. At this time, the second guide groove 6 of the operation member 52 is
8, the guide projection 70 of the return shaft 66 is locked in the shaft guide groove 147 of the retaining member 73.
The operation member 52, the return shaft 66 and the return spring 130 are unitized. The operation member 52, the return shaft 66, and the return spring 130 thus unitized are inserted through the other end of the guide cylinder 60. At this time, the guide piece 64 of the operation member 52 is guided by the first guide groove 62, and the operation member 52 is inserted to be displaceable in the axial direction of the guide cylinder 60.

FIG. 25 is a front view of the pressing member 61 of the operating means 46, FIG. 26 is a cross-sectional view of the pressing member 61 of FIG. It is a bottom view of the member 61. The pressing member 61 is a substantially cylindrical member having a bottom, and has a cylindrical peripheral wall 150 and a bottom 151 having a smaller diameter than the peripheral wall 150 and protruding in the axial direction. An outer screw 154 is engraved on the outer peripheral portion of the peripheral wall 150 near the bottom 151. An inner screw 155 is engraved on the inner peripheral portion of the peripheral wall 150. A through-hole 156 is formed in the bottom 151, and the inner diameter D <b> 17 of the through-hole 151 is slightly larger than the outer diameter D <b> 11 of the operation member 52. Also, two flat portions 1 are provided on the outer peripheral portion of the bottom portion 151 at positions shifted by 180 ° in the circumferential direction.
57 are formed.

The operating member 52 is inserted into the through hole 156 of the bottom 151 in a state where the unitized operating member 52, the return shaft 66 and the return spring 130 are inserted inside the guide cylinder 60. And the inner screw 155 of the holding member 61 is
It is screwed into the outer screw 83 and assembled. In a state in which one end in the axial direction of the pressing member 61 screwed to the mounting member 58 is positioned in contact with the flange 78, the pressing member 6
The other end of the guide cylinder 60 in the axial direction abuts on the bottom 151 of the first guide tube 60. Thereby, the first guide groove 6 formed in the guide cylinder 60 is formed.
The second opening is closed, and the guide piece 64 of the operation member 52 guided by the first guide groove 62 is prevented from being detached from the first guide groove 62.

FIG. 28 is a front view of the holding member 72 of the operating means 46, FIG. 29 is a cross-sectional view of the holding member 72 of FIG. 28 taken along the line VVIX-XXIX, and FIG. FIG. 31 is a left side view of the holding member 112, and FIG. 31 is a right side view of the holding member 72 of FIG. Holding member 72
Has a substantially cylindrical base 161, an arm 162 extending radially outward from the outer periphery of the base 161, and a magnet holding part 163 provided at a tip end of the arm 162 and holding the permanent magnet piece 50. ing. The base 161 is substantially C-shaped, and an engagement claw 164 projecting inward in the radial direction is provided on an inner peripheral portion of the base 161. Such an engagement claw 1
64 is formed in a substantially rectangular parallelepiped shape corresponding to the shape of the engagement groove 108 formed in the small outer diameter portion 100 of the return shaft 66.

The holding member 72 is attached to the small outer diameter portion 100 of the return shaft 66 protruding from the second inlet gas flow passage 24 which is a part of the gas flow passage in the housing 709. The holding member 78 is connected to the return shaft 66 by being fitted in a direction perpendicular to. Specifically, the base 161
The engaging pawl 164 provided on the small outer diameter portion 1 of the return shaft 66 is
00 is pressed against the small outer diameter portion 100 in accordance with the position of the engagement groove 108 formed. Then, the base 161 is pushed outward and elastically fits into the small outer diameter portion 100. The engagement of the engagement claws 164 into the engagement grooves 108 prevents the base 161 from being displaced in the axial direction and around the return shaft 66 with respect to the return shaft 66. When the permanent magnet piece 50 held by the holding member 72 is mounted in the housing 709 of the operating means 46, the angular position of the permanent magnet piece 50 returns to the horizontal direction when the operating member 52 is in a natural state where the returning operation is not performed. The angle is 60 ° downward about the axis of the shaft 66.

Next, the procedure for mounting the operating means 46 in the mounting hole 712 formed in the housing 709 will be described. Mounting hole 712 formed in upper case 14 of housing 709 separated into upper case 14 and lower case 12
A mounting member 58 is screwed from the bottom 76 to the inside of the mounting member 58, and one end of the guide cylinder 60 in the axial direction is mounted on the mounting member 58.
The guide tube 60 is fixed to the mounting member 58 by inserting the guide tube 60 until the guide tube 60 comes into contact with the bottom portion 76. Next, a unitized operation member 5
2. With respect to the return shaft 66 and the return spring 130, the return shaft 6
The washer 126 and the O-ring 124 are attached to the small diameter portion 100 of No. 6. Next, each of the unitized members is referred to as an operation member 52.
The guide piece 64 is inserted from the opening of the first guide groove 62 of the guide tube 60 and inserted into the guide tube 60, and the small outer diameter portion 100 of the return shaft 66 is inserted through the shaft hole 82 of the mounting member 50 into the second inlet gas. It protrudes into the path 24. Thereafter, the holding member 61 is inserted into the mounting member 58 in a state where the operation member 58 is inserted through the through hole 156.
Screw. Thereby, the first guide groove 6 of the guide cylinder 60 is formed.
The guide piece 64 of the operation member 52 fitted in the second member 2 is prevented from coming off.

When the operating member 52, the return shaft 66, and the return spring 130 are not unitized, the operating member 52 is attached to the guide projection 70 of the return shaft 66 against the spring force of the return spring 130. The guide piece 64 of the operation member 52 must be fitted into the first guide groove 52 of the guide cylinder 60 while the second guide groove 68 is fitted, and the pressing member 61 is screwed onto the mounting member 52 from above. This is a difficult installation work. On the other hand, as described above, in the present embodiment, the operation member 52, the return shaft 66, and the return spring 130 are assembled in advance to form a unit, so that the workability is very good and the assembly can be performed quickly.

Next, a holding member 72 for holding the permanent magnet piece 50 is inserted into the second inlet gas flow path 24 from below the upper case 14, and the inside of the second inlet gas flow path 24 is inserted from the bottom of the mounting member 58. The holding member 7 is attached to the small outer diameter portion 100 of the return shaft 66 projecting to
The 2 C-shaped base 161 is also resiliently fitted into the small outer diameter portion 100 of the return shaft 66. As a result, the holding member 72 is held by the return shaft 66 in a state where the displacement of the return shaft 66 in the axial direction and the angular displacement of the return shaft 66 around the axis are prevented.
As described above, since the holding member 72 is fitted from a direction perpendicular to the axial direction of the return shaft 66, even if the work is performed in the second inlet gas flow path 24 having a small work space, the work is performed from below the upper case 14. The holding member 72 can be inserted and fitted, and the holding member 72 can be easily inserted into the return shaft 66 in the upper case 14.
Can be connected.

The holding member 72 has a C-shaped base 161.
Is resiliently fitted into the small outer diameter portion 100 of the return shaft 66, so that the holding member 72 can be detached from the return shaft 66 without being damaged. For example, when the holding member 72 is connected by snap fitting from the axial direction of the return shaft 66, it is extremely difficult to separate the holding member 72 and the return shaft 66 without damaging them in the small working space of the upper case 14. Although it is difficult, in the present embodiment, the holding member 72 can be detached easily and without damage by pulling the holding member 72 downward from the return shaft 66. This makes it possible to remove the holding member 72 when collecting the gas meter and reuse it.

FIG. 32 is a front view showing a magnetic shielding member 47 surrounding the switching element 44, and FIG.
5 is a left side view of the magnetic shielding member 47 of FIG. Magnetic shielding member 4
Reference numeral 7 denotes a box-shaped member whose front and bottom surfaces are open, and is made of a ferromagnetic material such as iron. The magnetic shielding member 47 surrounds the switching element 44 and the circuit board 30.
Mounted on top. At this time, the front opening 177 of the magnetic shielding member 47 faces the control partition 31. That is, the opening 17
7 faces the moving path of the permanent magnet piece 50 of the operating means 46.

As a result, the switching mode of the switching element 44 changes in response to a change in the magnetic field due to the displacement of the permanent magnet piece 50 when the operating means 46 is returned. Thus, when the gas meter 4 is started to be used or when the gas meter 4 is not used for a long period of time, an erroneous recognition is prevented when the control unit 37 is activated or stopped by bringing the magnet close to the activation switching element 41 provided on the circuit board 30. And mischief can be prevented.

FIG. 3 shows the structure of such a magnetic shielding member 47.
An auxiliary shielding plate 180 is provided to partially cover the opening 177 as indicated by the imaginary lines in the reference numerals 2 and 33, and the magnetic force acting on the switching element 44 can be adjusted by changing the opening area of the opening 177. . This allows the permanent magnet piece 5 to be used in a relatively small gas meter.
When the distance between the zero movement path and the switching element 44 is short, it is possible to prevent the problem that the magnetic force of the permanent magnet piece 50 is too large and the switching mode of the switching element 44 does not change.

FIG. 34 is a sectional view showing a state in which the operating member 52 of the operating means 46 is displaced in the axial direction in FIG. 1, FIG. 35 is a sectional view showing the operating means 46 of FIG. 34, and FIG. The operation means 46 shown in FIG.
It is a rear view which shows the state seen from the inside of 09 in a simplified manner. 34 and 35 do not show the cap 56 provided on the operation means 46. Housing 709
When the operating member 52 is pressed in the return operation direction A1 by the operation means 46 mounted on the front wall 48 of the, the operation member 52 is linearly displaced toward the inside of the housing 709 in the return operation direction A1. At this time, since the guide piece 64 of the operation member 52 is guided by the first guide groove 62 of the guide cylinder 60, the operation member 52 is allowed to displace only in the axial direction in a state where the displacement around the axis L1 is prevented. Is done. At this time, the guide projection 70 of the return shaft 66 is
2 is guided by the helical second guide groove 68 and the second guide groove 5
8, the return shaft 66 is angularly displaced in the direction of the arrow B1 by being pressed against the surface facing the upstream side of the operation member 52 in the return operation direction A1 in FIG. Accordingly, the holding member 72 fixed to the return shaft 66 is also angularly displaced in the direction of the arrow B1, and is angularly displaced from the initial position 170 shown by the broken line in FIG. I do. When the permanent magnet piece 50 held by the magnet holding member 148 of the holding member 72 approaches the switching element 44 and approaches the switching element 44, the control unit 37 responds to the ON state of the switching element 44, and And the shut-off valve 6 is opened.

As described above, as a return operation for opening the shut-off valve 6 when the abnormality is resolved, the operating member 52 of the operating means 46 is pressed to open the shut-off valve 6 as described above. The gas flow path in the closed state can be returned to the open state again.

When the operating member 52 releases the pressing force,
The operation member 52 is returned by the spring force of the return spring 130 in a direction opposite to the return operation direction A1, that is, in a return operation direction A1 toward the outside of the housing 709 in the axial direction of the operation member 52.
Is pressed. At this time, the guide projection 70 of the return shaft 66 is guided by the second guide groove 68 of the operation member 52, so that the return shaft 66 is angularly displaced in the direction of the arrow B2. This return shaft 6
The holding member 72 fixed to the return shaft 66 is also angularly displaced in the direction of the arrow B2 in conjunction with the angular displacement of No. 6 and returns from the working position 172 to the initial position 170.

Gas meter 4 equipped with bidirectional shut-off valve 6
In, the permanent magnet piece 50 is angularly displaced in conjunction with the linear displacement of the operating member 52 in the direction A1 due to the pressing of the operating member 52 of the operating means 46, whereby the shut-off valve 6 is opened. Arrow B of such a permanent magnet piece 50
In order to allow angular displacement in one direction, the housing 70
It is not necessary to secure a large space in the depth direction of 9, ie, in the axial direction of the operation member 52. As a result, FIG.
When the bidirectional shutoff valve 6 is mounted on the housing 709 of the existing gas meter 704 on which the unidirectional shutoff valve 706 shown in FIG. 1 is mounted, there is no need to change the configuration of the housing 709. As described above, the bidirectional shutoff valve 6 can be easily mounted without largely modifying the existing gas meter.

Further, since the permanent magnet piece 50 can be angularly displaced and the permanent magnet piece 50 can be largely displaced in conjunction with the linear displacement of the operation member 52 of the operation means 46, the space in the axial direction of the operation member 52 can be increased. Is small, the change in the magnetic field in the region where the switching element 44 is provided can be increased. Therefore, by pressing the operating member 56 of the operating means 40 to perform a linear displacement in the axial direction as the return operation, the switching mode of the switching element 44 can be reliably switched, and the control means 37 controls the valve opening operation of the shut-off valve 6. Is performed reliably.

The initial position 170 of the permanent magnet piece 50 in the operating means 46 is set at an angle of 60 ° clockwise with respect to the horizontal when viewed from the outside of the housing 709 in the axial direction of the operating member 52. However, as another embodiment, the initial position of the permanent magnet piece 50 may be set at the lowest position in the vertical direction. In such a case, since the torque due to the weight of the permanent magnet piece 50 is not applied to the return shaft 66, the permanent magnet piece 50 can be kept in the initial position in a stable state.

In the present embodiment, the switching element 44 is constituted by a reed switch, and is configured to change from the off state to the on state when the permanent magnet piece 50 approaches, but as another form, the switching element The element 44 may be configured to change from the off state to the on state when the permanent magnet piece separates. In such a case, the operating unit 46 sets the initial position of the permanent magnet piece 50 to a position close to the switching element 44 and presses the operating member 50 to displace the permanent magnet piece 5.
0 is angularly displaced and separated from the switching element 44.

FIG. 37 is a sectional view showing a part of a gas meter 204 on which a two-way shut-off valve 206 manufactured by a gas meter manufacturing method according to another embodiment of the present invention is mounted. The gas meter 204 according to the present embodiment is similar to the gas meter 4 shown in FIG. 1, and the corresponding portions are denoted by the same reference numerals and description thereof will be omitted. The gas meter 204 has a gas flow path through which a gas with a larger flow rate can flow than the gas meter 4 shown in FIG. Housing 21 of gas meter 204
0 indicates that the front wall 248 is formed to bulge forward to form a gas flow path through which a large flow rate of gas flows. Therefore, the position of the operating means 246 provided on the housing 210 is different from that of the gas meter 4 shown in FIG.
More distant.

FIG. 38 shows the gas meter 204 shown in FIG.
FIG. 14 is a cross-sectional view showing the operation means 246 of the return operation switch 245 of FIG. In the operating means 246, the length of the mounting member 258 in the axial direction is set to be larger than that of the mounting member 58 in the above-described embodiment, and is provided so as to protrude to a position deep in the gas flow path. When the guide tube 60 is inserted and provided inside such a mounting member 258, the guide tube 60 is inserted to a position deeper than the guide tube 60. Therefore, when the operation means 246 is mounted, the guide cylinder 60
Has a gap between the guide cylinder 60 and the pressing member 61.
By interposing the spacer member 220 between the holding member 61 and the pressing member 61, the guide tube 60 used in the above-described embodiment can be used, and there is no need to separately manufacture a guide tube.

In the operating means 246, the return shaft 66
The permanent magnet piece 50 is attached to the return shaft 66 by fitting the holding member 272 into the small outer diameter portion 100 protruding into the gas flow path in the housing 210 of the housing 210. On the holding member 272, an arm 362 for supporting the magnet holding portion 363 extends from the outer peripheral portion of the base 144. The arm 362 is longer than the arm 162 of the holding member 72 in the above-described embodiment, and the permanent magnet piece 50 is
Kept away from.

FIG. 39 is a sectional view showing a state where the operating member 52 of the operating means 246 in FIG. 37 is displaced in the axial direction, and FIG. 40 is a sectional view showing the operating means 246 in FIG.
FIG. 41 is a sectional view showing the operation means 246 of FIG.
FIG. 7 is a simplified rear view showing a state viewed from the inside of a housing 709. 39 and FIG. 40 do not show the cap 56 provided on the operation means 246. By pressing the operation member 52 of the operation means 246 in the return operation direction A1, the operation member 52 is linearly displaced in the insertion operation direction A1 toward the inside of the housing 709, and is held by the magnet holding portion 348 of the holding member 272. Permanent magnet piece 50
Is angularly displaced from an initial position 380 shown by a broken line in FIG. 41 to an operation position 372 shown by a solid line. Further, as described above, the mounting member 258 is provided so as to protrude to a position deep in the gas flow path, and the length of the arm 346 of the holding member 272 is set to be large. In the position deeper in the gas flow path compared to the form,
A position apart from the return shaft 66 in a direction perpendicular to the axial direction of the return shaft 66 is defined as a movement path. Thus, by pressing the operation member 52, the permanent magnet piece 50 can be reliably brought close to the switching element 44 and reliably switched on. As a result, the control means 37 outputs a return signal to the shutoff valve 206, the shutoff valve 206 is opened, and the gas flow path can be returned to the open state.

As described above, in the present embodiment, the shape of the arm of the holding member in the operating means is changed, and the spacer 220
It is possible to cope with various gas meters having different shapes only by interposing the gas meter.

FIG. 42 is a sectional view showing a gas meter 404 on which a two-way shut-off valve 402 manufactured by a gas meter manufacturing method according to still another embodiment of the present invention is mounted. The gas meter 404 is a gas meter 4 shown in FIG.
, The same parts are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, unlike the above-described embodiment, the permanent magnet piece is linearly displaced by the pressing operation of the operating means 405, and the switching mode of the switching element 44 is switched. The operation means 405 mounted on the gas meter 404 is provided on the front wall 48 of the housing 709 of the gas meter 404 at the upper left of the integrating display unit 20.
Mounting hole 712 formed in front wall 48 of housing 709
The mounting member 406 of the operation means 405 is screwed to the, as in the above-described embodiment. Cylindrical mounting member 4 with bottom
A guide cylinder 408 having a cylindrical shape with a bottom is fitted inside the housing 06 with the bottom part facing out of the housing 709.
A return spring 414 as a compression coil spring is interposed between the bottom of the mounting member 406 and the bottom of the mounting member 406, whereby the guide cylinder 408 is spring-biased in a direction protruding from the housing 709. The mounting member 406 and the guide cylinder 40
A substantially cylindrical operating member 410 is provided so as to be able to be displaced in the axial direction, penetrating the bottom of the base member 8. A disc-shaped pressing portion 41 is provided at one axial end of the operation member 410 that protrudes outward.
2 are provided and fixed to the bottom of the guide tube 408.

The other end of the operating member 410 in the axial direction, that is, the inner end of the housing 709 is attached to the permanent magnet piece 41.
8 is fixed. The permanent magnet piece 418 of the holding member 416 is arranged facing the switching element 44 with the control partition 31 of the housing 709 interposed therebetween.

FIG. 43 is a sectional view showing a state when the operating member 410 of the operating means 405 in FIG. 42 is displaced in the axial direction. In the operation means 405, an operation member 410
Is pressed in the direction of arrow C1 against the spring force of the return spring 414, the operating member 410 and the permanent magnet piece 418 attached to the operating member 410 are also linearly displaced in the direction of arrow C1. The switching element 44 provided in the housing 709 is disposed facing the movement path of the permanent magnet piece 418, and in a natural state where the operating member 410 is not pressed, the permanent magnet piece 418 is located at a position separated from the switching element 44. When the operating member 410 is pressed, the permanent magnet piece 418 approaches the switching element 44. As a result, the switching mode of the switching element 44 is switched, and the switching element 44 is turned on,
The control unit 37 outputs a return signal to the shutoff valve 402, and the control unit 37 causes the shutoff valve 402 to open. Therefore, when the abnormality is resolved, by pressing the pressing portion 412 of the operation member 410 as a return operation, the shutoff valve 402 is opened, and the gas flow path is returned to the open state.

Since the operating means 405 can displace the permanent magnet piece 418 with a simple configuration, it is not necessary to largely change the configuration of the housing 709 of the existing gas meter.

When the pressing of the operating member 412 is released,
The operation member 412 is displaced in the direction of arrow C2 by the spring force of the return spring 414, and the permanent magnet piece 418 is similarly displaced and returns to the initial position.

FIG. 44 is a sectional view showing a gas meter 504 equipped with a two-way shut-off valve 502 manufactured by a gas meter manufacturing method according to still another embodiment of the present invention. FIG. 45 is a gas meter shown in FIG. FIG. 5 is a diagram of the operation unit 505 mounted on the 504 as viewed from the front of the gas meter 504. The gas meter 504 is the gas meter 4 shown in FIG.
, And the same portions are denoted by the same reference characters and description thereof will be omitted. In the present embodiment, unlike the above-described embodiments, when returning the shut-off valve 502, the operator angularly displaces the operation member 510 of the operation means 505.

The operating means 505 is provided on the front wall 48 of the housing 709 of the gas meter 504 at the upper left of the integrating display unit 20. A mounting member 5 having a bottomed cylindrical shape is provided in a mounting hole 712 formed in the front wall 48 of the housing 709.
Reference numeral 06 is screwed into the mounting member 506, and a bottomed cylindrical guide tube 508 is fitted inside the mounting member 506. The guide tube 5 extends through the mounting member 506 and the bottom of the guide tube 508.
08, a substantially cylindrical operating member 510 is inserted therethrough.
The operation member 510 is provided so as to be angularly displaceable about its axis. A return spring 514, which is a torsion spring, is interposed between the inner circumference of the guide cylinder 508 and the outer circumference of the operation member 510.

An operation section 512 is provided at one end in the axial direction of the operation member 510, that is, outside the housing 709. The operation unit 512 extends in a direction perpendicular to the axial direction of the operation member 510, and hangs downward from the operation member 510 in a natural state. A holding member 516 is fixed to the other end of the operation member 510, that is, inside the housing 709. The holding member 516 extends in a direction perpendicular to the axis of the operation member 510, and is formed to stand up from the operation member 510 above the gas meter 504 in a natural state, and a permanent magnet piece 518 is held at an end portion.

FIG. 46 is a sectional view showing a state in which the operating member 510 of the operating means 505 of the gas meter 504 in FIG. 44 is angularly displaced around the axis. FIG. 47 is a sectional view showing the operating means 505 in FIG. It is the figure seen from the front of. The operating member 505 is angularly displaced in the clockwise arrow E1 direction as viewed from the front side of the gas meter 504 against the spring force of the return spring 514 of the operating portion 512 of the operating member 510 to rotate the operating member 510 around the axis. When the angular displacement in the direction of arrow E1 is made, the permanent magnet piece 518 held by the holding member 516 also moves around the axis of the operating member 510 by arrow E1.
Angular displacement in the direction. At this time, the permanent magnet piece 518 is provided in the housing 709 and is close to the switching element 44 arranged facing the movement path of the permanent magnet piece 518. As a result, the switching element 44 is turned on, the control means 37 outputs a return signal to the shutoff valve 502,
The control means 37 operates to open the shut-off valve 502. Therefore, when the abnormality is resolved, the operation section 512 of the operation member 510 is angularly displaced as the return operation, and the operation member 510 is angularly displaced around the axis, whereby the shut-off valve 6 is opened and the gas flow path of the gas meter 504 is opened. The state is restored.

In this manner, in the gas meter 504, the permanent magnet piece 518 is fixedly attached to the operating member 510 of the operating means 505.
5 can be simplified. Also, the mounting member 51
By angularly displacing 0, the permanent magnet piece 518 can be angularly displaced and greatly displaced. Therefore, even if the space in the axial direction of the operation means 505 is small, the change in the magnetic field in the area where the switching element 44 is provided is large. can do.

The gas meter 504 includes an operating member 510
When the angular displacement operation is released, the permanent magnet piece 518 of the operation member 510 is displaced by the spring force of the return spring 514 in the direction of the arrow E2 opposite to the direction of the arrow E1, and returns to the initial position.

FIG. 46 is a sectional view showing a gas meter 604 equipped with a two-way shut-off valve 602 manufactured by a gas meter manufacturing method according to still another embodiment of the present invention. The gas meter 604 is similar to the gas meter 4 shown in FIG.

The operation means 605 of the gas meter 604 is provided on the front wall 48 of the housing 709 of the gas meter 604 at the upper left of the integrating display unit 20. Housing 7
A mounting member 606 having a cylindrical shape with a bottom is screwed into a mounting hole 712 formed in 09. A spiral guide groove is formed on the inner periphery of the mounting member 606. Mounting member 60
A guide cylinder 408 having a tangible cylindrical shape is fitted into the inside of the housing 6 with the bottom part facing outward of the housing 709. A guide protrusion is provided on an outer peripheral portion of the guide cylinder 608 so as to protrude outward in the radial direction, and the guide protrusion is fitted into a guide groove on an inner periphery of the mounting member 606. A return spring 614, which is a compression coil spring, is interposed between the bottom of the mounting member 606 and the bottom of the guide tube 408. A substantially cylindrical operating member 610 is provided so as to be angularly displaceable around the axis with respect to the mounting member 606 by passing through the inside of the mounting member 606 and the guide cylinder 408. A pressing portion 612 is provided at the other end of the operation member 610 in the axial direction, that is, at an end outside the housing 709, and the pressing portion 612 is fixed to the bottom of the guide cylinder 608. The holding member 61 is provided at the other end in the axial direction of the operation member 610, that is, at the end inside the housing 709.
6 is fixed. The holding member 616 includes the operating member 61.
It extends in a direction perpendicular to the axis 0 and rises above the gas meter 604 from the operating member 610. In the holding member 616, a permanent magnet piece 618 is held at an end opposite to the end fixed to the operation member 610.

FIG. 49 shows the operation means 605 in FIG.
FIG. 10 is a cross-sectional view showing a state when the operation member 610 is angularly displaced around an axis. By pressing the pressing portion 612 of the operating member 610 in the direction of arrow F1 against the spring force of the return spring 614 in the operating means 605, the operating member 6
The guide projection of the guide cylinder 608 fixed to the mounting member 6
06 is guided along the guide groove. Therefore, the operating member 610 moves in the direction of the arrow F inward of the housing 710.
The permanent magnet piece of the holding member 616 is interlocked with the linear displacement in one direction and the angular displacement in the direction of arrow G1 in the counterclockwise direction when viewed from the front, that is, the spiral displacement. Reference numeral 618 is angularly displaced in the axial direction F1 of the operation member 610 and in the direction G1 around the axis, and is displaced helically. At this time, the permanent magnet piece 618 approaches the switching element 44 provided facing the movement path of the permanent magnet piece 618 with the control partition 31 provided in the housing 709 interposed therebetween. Thereby, the switching element 44
Is turned on, and the control means 37 causes the shutoff valve 602 to open. Therefore, when the abnormality is resolved, the return operation is performed to press the pressing portion 612 of the operation member 610, and the operation member 610 is pressed.
Is displaced in the axial direction to open the shutoff valve 602 to return the gas flow path to the open state.

As described above, the operating member 61 of the operating means 605
Since the permanent magnet piece 618 is angularly displaced in conjunction with the displacement in the axial direction of 0, the same operation and effect as in the embodiment shown in FIG. 1 can be obtained.

FIGS. 50 to 57 are views showing gas meters manufactured by various gas meter manufacturing methods according to still another embodiment of the present invention. The gas meter shown in FIGS. 50 to 57 uses a gas meter housing on which a unidirectional shutoff valve is mounted, and is equipped with a bidirectional shutoff valve instead of the unidirectional shutoff valve. An operation switch is provided.

The gas meter 4a shown in FIG.
The switching element 44a, which is a reed switch, is provided on the housing 0a near the upper wall of the housing 709a.
In such a gas meter 4a, when the operator brings the magnet 50a close to the switching element 44a from outside, the switching mode of the switching element 44a can be changed and the bidirectional shutoff valve can be returned. Such a gas meter 4a does not require drilling,
It can be realized at relatively low cost.

The gas meter 4b shown in FIG.
A switching element 44b, which is a reed switch provided near the upper wall of the housing on
A slide switch 46b having a permanent magnet piece 50b adhered to the upper wall of 9b is provided. The slide switch 46b is attached to a hole formed in the housing by snap fitting from above. Slide switch 46b
Sideways to slide the permanent magnet piece 50
b is displaced linearly. In such a gas meter 4b, the two-way shutoff valve can be returned by bringing the permanent magnet piece 50b close to the switching element 44b.

The gas meter 4c shown in FIG.
A push button switch 44c is provided on the top of the housing 709c, and a push button 46c as a return button is mounted on the upper wall of the housing 709c. In such a gas meter 4c, when the push button 46c is pressed, the push button switch 44c below the push button 46c is pressed to be turned on, and the bidirectional shutoff valve is returned.

The gas meter 4d shown in FIG. 53 is provided with a push button switch 46d, which is a return button after drilling a hole in the upper wall of the housing.
And the circuit board 30d are directly connected by a lead wire 54d instead of a reed switch. In such a gas meter 4d, the bidirectional shutoff valve can be returned by pressing the push button switch 46d.

The gas meter 4e shown in FIG. 54 is provided with a push button switch 46e attached to a mounting hole 712e of the housing 709e.
e, the circuit board 30e through the front of the gas meter 4e.
It has a first lead wire 54e1 to be connected and a second lead wire 54e2 provided from the back surface of the gas meter 4e and connected to the circuit board 30e through an extraction groove for connection to a telephone line and an alarm device. Such a gas meter 4e
In this case, the bidirectional blocking surface can be restored by pressing the push button switch 46e.

The gas meter 4f shown in FIG. 55 includes a lead wire 54f connected to a circuit board from a lead-out groove of a telephone line and a line for connection to an alarm device, and a push button switch 46f attached to the tip of the lead wire 54f. And The push button switch 46f can be attached to the side surface of the gas meter 4f by snap fitting as shown in FIG. Further, as shown in FIG. 55 (b), the push button switch 46f is made to hang downward or to be mounted on a wall depending on the situation of the installation place of the gas meter 4e. Even in such a gas meter 4f, the bidirectional shutoff valve can be returned by pressing the push button switch 46f.

The gas meter 4g shown in FIG. 56 includes a switch connected to the circuit board, and a string 4 attached to the switch and pulled out of the housing to hang down.
6 g. With respect to such a gas meter 4g, the switch can be switched by pulling the string 46g to return the bidirectional shutoff valve.

The gas meter 4h in FIG. 57 includes, for example, an NCU capable of transmitting gas-related information of the gas meter 4h to a monitoring center located at a remote place via a telephone line, and remotely controlling a bidirectional shutoff valve. Communication device 5 called
5h is connected. The communication device 55h is provided with a push button switch 46h for returning the shut-off valve. In such a gas meter 4h, by pressing the push button switch 46h, the bidirectional shutoff valve can be returned via the communication device 55h.

[0118]

[0119]

According to the first aspect of the present invention, the unidirectional shutoff valve, the unidirectional shutoff control means, and the operating member are removed from the existing gas meter housing having the unidirectional shutoff valve mounted in the housing, By mounting the two-way shut-off valve, the control means for the two-way shut-off valve and the return operation switch on the housing, both the existing gas meter housing and the one-way shut-off valve can be replaced with a more secure and remote operation. A direction shutoff valve can be mounted. In this way, a gas meter equipped with a two-way shut-off valve can be manufactured using the existing gas meter housing. Costs can be significantly reduced.

When a two-way shut-off valve is installed in the existing gas meter housing instead of the one-way shut-off valve, the insertion hole of the partition wall on which the operating member is mounted is used as a valve hole for the two-way shut-off valve. . As a result, it is not necessary to newly form a valve hole closed by the valve body in the housing, and the housing of the existing gas meter can be used as it is without largely modifying the housing.

According to the present invention, a mounting hole for mounting a reset operation button for resetting the unidirectional shut-off valve is formed in the housing of the existing gas meter equipped with the unidirectional shut-off valve. According to the present invention, when replacing a unidirectional shutoff valve provided in an existing gas meter with a bidirectional shutoff valve, a return operation switch for resetting the bidirectional shutoff valve is mounted in this mounting hole. This eliminates the need to newly form a mounting hole for mounting the return operation switch in the existing gas meter housing, and eliminates the need to close the mounting hole where the return operation button was mounted. Therefore, there is no need to make holes or other processing on the existing gas meter housing. Can be.

According to the present invention, when the two-way shut-off valve is returned, the operator performs a predetermined return operation by pressing or angularly displacing the operation member mounted in the mounting hole of the housing, thereby performing the permanent magnet piece. Is displaced. Then, the switching mode of the switching element mounted in the housing is switched according to the displacement of the permanent magnet piece. When the switching mode is switched, the control means for the bidirectional shutoff valve provided in the housing outputs a return signal, and in response to the return signal, the bidirectional shutoff valve opens to open the gas flow path. Return.

Since the one-way shut-off valve is provided facing the gas flow path, a return operation button for pushing back the valve element of the one-way shut-off valve is also provided facing the gas flow path, and the return operation button is mounted. The mounting hole to be formed is also formed facing the gas flow path.
On the other hand, the control means is disposed in a control chamber communicating with the atmosphere, and is separated from the gas flow path by a partition.

When an operation switch for a two-way valve is provided in the mounting hole of the return operation button, it is necessary to connect the operation switch and the operation means by an electric cable. It is necessary to perform a perforating process and a sealing process on the control partition between them. On the other hand, in the present invention, for example, the operating means and the permanent magnet piece are provided on the gas flow path side, and the switching element is provided on the control chamber side, so that the gas flow path and the control chamber do not communicate with each other,
The return operation of the bidirectional shutoff valve can be performed by the operation member mounted in the conventional mounting hole.

According to the second aspect of the present invention, the permanent magnet piece is angularly displaced in conjunction with the axial displacement of the operating member due to the operator's return operation, so that the area where the switching element is provided is provided. The switching changes, and the switching mode of the switching element switches. In order to allow such angular displacement of the permanent magnet pieces, it is not necessary to secure a large space in the depth direction of the gas meter housing, that is, in the axial direction of the operation member. Accordingly, when the bidirectional shutoff valve is mounted on an existing gas meter, it is not necessary to largely change the configuration near the permanent magnet piece disposed in the housing. By mounting the bidirectional shutoff valve on the existing gas meter without making major modifications to the existing gas meter in this way, the bidirectional shutoff valve that can be easily and reliably closed when the occurrence of an abnormality is resolved is opened. Can be restored.

Also, by linearly displacing the operating member in the axial direction, the permanent magnet piece can be angularly displaced and greatly displaced. Therefore, even if the space occupied by the operating member in the axial direction is small, the area where the switching element is provided can be reduced. The change in the magnetic field can be increased. Therefore, by displacing the operating member in the axial direction as the return operation of the operating means and greatly changing the magnetic field, it is possible to reliably switch the switching mode of the switching element and to reliably output the return signal from the control means to the shut-off valve. Thus, the opening operation of the bidirectional shutoff valve is reliably performed.

According to the third aspect of the present invention, the operating member is displaced in the axial direction by pushing or pulling the operating member, and the permanent magnet piece fixedly attached to the operating member is linearly displaced. The switching mode of the switching element is switched by the linear displacement of the permanent magnet piece, and the bidirectional shutoff valve opens to return. Thus, in the present invention, only the permanent magnet piece is fixedly attached to the operating member,
The configuration of the operation member can be simplified.

According to the present invention, the operation member is angularly displaced and the permanent magnet piece fixedly attached to the operation member is angularly displaced, thereby switching the switching mode of the switching element and bidirectionally interrupting. The valve opens and the gas meter returns. As described above, in the present invention, since the permanent magnet piece is configured to be fixedly attached to the operation member, the configuration of the operation means can be simplified.

Further, since the permanent magnet piece can be largely angularly displaced by angularly displacing the operation member, even if the space occupied by the operation member in the axial direction is small, the change in the magnetic field in the area where the switching element is provided is large. can do. Therefore, the operation means can surely change the switching mode of the switching element, and can reliably output the return signal to the control means, so that the opening operation of the bidirectional shutoff valve is reliably performed.

According to the fifth aspect of the present invention, the switching element is surrounded by a magnetic shielding member made of a ferromagnetic material, and the magnetic shielding member has an opening facing the moving path of the permanent magnet piece. By forming the switching element, the switching mode of the switching element changes only in response to a change in the magnetic field on the side facing the movement path of the permanent magnet piece, and thus only a change in the magnetic field due to the displacement of the permanent magnet piece.

When the gas meter is used for the first time, the control means is started by switching the switching mode of the start switching element provided in the control means by applying a magnetic field by approaching a magnet from the outside. At this time, the shutoff valve is simultaneously opened to open the gas flow path. When the gas meter is not used for a long time, the function of the control means is stopped by operating the magnet in the same manner as when starting use, in order to prevent battery consumption. At this time, the shutoff valve is also closed at the same time. At this time, the indicator light provided on the gas meter is turned on as a signal that the control means has been activated or the function has been stopped,
The light turns off after about 40 seconds. Also, this indicator light is lit so that the shut-off valve is closed and the gas flow path is shut off so that it can be recognized from the outside even when the gas flow path is shut off.

As described above, the switching mode is switched and restored by the change in the magnetic field of the switching element. The switching mode of the switching element for the shut-off valve is not switched, and the switching mode of the switching element for the shut-off valve is switched, so that the shut-off valve may be closed without stopping the function of the control means. That is, when the shut-off valve is closed and the indicator light is turned on, the operator may erroneously recognize that the function of the control means is stopped and the indicator light is turned on. 4 if the function stops
The light turns off after about 0 seconds, so it is possible to confirm that the function has stopped.However, the operator determines that the function has stopped from turning on the indicator light without confirming that the function has turned off, and the next When the user goes to the work place, the indicator light keeps on, and the battery is significantly consumed.

On the other hand, in the present invention, the switching element of the two-way shut-off valve is shielded from the magnetism other than the permanent magnet piece of the operating means by the magnetic shielding member, so that only the returning operation of the operating member by the operator is supported. The shut-off valve returns,
It is possible to prevent erroneous recognition as described above.

By changing the opening area of such a magnetic shielding member, the intensity of the magnetic field acting on the switching element can be adjusted. For example, when the distance between the moving path of the permanent magnet piece and the switching element is small, such as in a relatively small gas meter, the magnetic force of the permanent magnet piece is too large, and the magnetic field acting on the switching element is changed. Although the problem that the switching mode of the switching element does not change may occur, the switching mode of the switching element can be reliably switched by reducing the opening area and reducing the strength of the magnetic field acting on the switching element.

The return operation of the shut-off valve is prevented by a change in the magnetic field other than when the operator causes the operating means to return, for example, a mischief such as intentionally bringing a magnet from the outside. The open state is prevented.

[0136]

Such a gas meter is provided with a shutoff valve that shuts off the gas flow path in response to the abnormal signal and opens the gas flow path in response to the return signal. As a result, only when the abnormal state is resolved, the return signal is output from the control means to the shut-off valve so that the gas flow path can be opened, and high safety can be secured. Further, when such a plurality of gas meters are continuously communicable with a monitoring center provided in a remote place, the gas-related information of each gas meter from the monitoring center can be confirmed, and the operation of opening / closing the shut-off valve can be remotely controlled. Can be done by operation. According to the present invention, the switching element whose switching mode is switched by the change of the magnetic field is connected to the control means for the bidirectional shutoff valve, and this control means is mounted in the housing together with the bidirectional shutoff valve. To return the gas meter, the operator displaces the permanent magnet outside the housing. Then, the magnetic field near the switching element in the housing changes and the switching mode of the switching element is switched, a return signal is input to the bidirectional shutoff valve, and the gas meter returns. In this manner, a two-way shut-off valve gas meter can be manufactured using the housing of the one-way shut-off valve gas meter. According to the present invention, a push button switch is connected to the control means for the two-way shut-off valve, and this is attached to the housing for the one-way shut-off valve. Therefore, when the operator presses the push button, a return signal is input to the bidirectional shutoff valve, and the gas meter is returned. According to the present invention, the switch that switches by pulling the cord is attached to the control means for the bidirectional shutoff valve and attached to the housing for the unidirectional shutoff valve. Then, when the string is taken out of the housing and the gas meter is returned, the string is pulled. Then, the switch is switched, a return signal is input to the bidirectional shutoff valve, and the gas meter returns.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a gas meter 4 manufactured by a method for manufacturing a gas meter according to an embodiment of the present invention.

FIG. 2 is a front view of the gas meter 4 of FIG.

FIG. 3 is a right side view of the gas meter 4 of FIG. 2 as viewed from the right side.

FIG. 4 is a sectional view showing an operation means 46 of the gas meter 4 of FIG.

5 is an exploded perspective view of the operation means 46. FIG.

6 is a front view showing a guide cylinder 60 of the operation means 46. FIG.

FIG. 7 is a sectional view of the guide cylinder 60 of FIG. 6 as viewed from a section line VII-VII.

FIG. 8 is a plan view of the guide cylinder 60 of FIG. 6 as viewed from above.

FIG. 9 is an enlarged view showing a section IX of the guide cylinder 60 of FIG. 7;

10 is a front view showing a return shaft 66 of the operation means 46. FIG.

11 is a cross-sectional view of the return shaft 66 of FIG. 10 as viewed from a section line XI-XI.

12 is a plan view of the return shaft 66 of FIG. 10 as viewed from above.

13 is a sectional view taken along a line XIII-X of the return shaft 66 of FIG. 10;
It is sectional drawing seen from III.

14 is a bottom view of the return shaft 66 of FIG. 10 as viewed from below.

FIG. 15 is a front view showing an operation member 52 of the operation means 46.

FIG. 16 is a side view of the operation member 52 of FIG.

17 is a plan view of the operation member 52 of FIG. 15 as viewed from above.

18 is a sectional view taken along a line XVIII of the operation member 52 of FIG.
It is sectional drawing seen from -XVIII.

FIG. 19 is a view showing an inner circumference of the operation member 52 of FIG.

20 is an enlarged view showing a fitting portion 136 of the operation member 52 in FIG.

FIG. 21 is a sectional view showing a retaining member 73 of the operation means 46.

FIG. 22 is a plan view of the retaining member 73 of FIG. 21 as viewed from above.

23 is a bottom view of the retaining member 73 of FIG. 21 as viewed from below.

24 is a sectional view taken along the line XXIV of the retaining member 33 shown in FIG. 21;
It is sectional drawing seen from -XXIV.

FIG. 25 is a front view showing a pressing member 61 of the operation means 46.

26 is a sectional view taken along line XXVI- of the pressing member 61 of FIG. 25;
It is sectional drawing seen from XXVI.

FIG. 27 is a bottom view of the pressing member 61 of FIG. 25 viewed from below.

FIG. 28 is a front view showing a holding member 72 of the operation means 46.

FIG. 29 is a sectional view taken along line XXIX- of the holding member 72 of FIG. 28;
It is sectional drawing seen from XXIX.

30 is a left side view of the holding member 72 of FIG. 28 as viewed from the left side.

31 is a right side view of the holding member 72 of FIG. 28 as viewed from the right side.

32 is a front view showing the magnetic shielding member 47. FIG.

FIG. 33 is a left side view of the magnetic shielding member 47 of FIG. 32 as viewed from the left side.

FIG. 34 is a cross-sectional view showing a state when the operation member 52 of the operation means 46 is displaced in the axial direction in the gas meter 4 of FIG.

FIG. 35 is a sectional view showing the operation means 46 of FIG. 34;

36 is a rear view of the operation unit 46 of FIG. 34 as viewed from inside a housing 709. FIG.

FIG. 37 is a cross-sectional view showing a part of a gas meter 204 manufactured by a method of manufacturing a gas meter according to another embodiment of the present invention.

FIG. 38 shows operation means 246 of the gas meter 204 shown in FIG.
FIG.

FIG. 39 shows operation means 246 of the gas meter 204 shown in FIG.
FIG. 7 is a cross-sectional view showing a state when the operation member 52 is displaced in the axial direction.

40 is a sectional view showing the operation means 246 of FIG. 39.

FIG. 41 shows the operation means 246 of FIG.
FIG. 2 is a rear view as viewed from the inside.

FIG. 42 is a cross-sectional view showing a gas meter 404 manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

43 is a cross-sectional view showing a state when the operation member 410 of the operation means 405 in the gas meter 404 in FIG. 42 is displaced in the axial direction.

FIG. 44 is a cross-sectional view showing a gas meter 504 manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 45 is a view of the operation means 505 mounted on the gas meter 504 of FIG. 44 as viewed from the front of the gas meter 504.

46 is a cross-sectional view showing a state when the operation member 515 of the operation means 505 in the gas meter 504 of FIG. 44 is angularly displaced.

FIG. 47 is a view of the operation means 505 mounted on the gas meter 504 of FIG. 46 when the upper part of the gas meter 504 is viewed from the front.

FIG. 48 is a cross-sectional view showing a gas meter 604 manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 49 is a cross-sectional view showing a state when the operation member 615 of the operation means 605 in the gas meter 604 in FIG. 48 is displaced in the axial direction.

FIG. 50 is a view showing a gas meter 4a manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 51 is a diagram showing a gas meter 4b manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 52 is a view showing a gas meter 4c manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 53 is a view showing a gas meter 4d manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 54 is a view showing a gas meter 4e manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 55 is a cross-sectional view showing a gas meter 4f manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 56 is a cross-sectional view showing a gas meter 4g manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 57 is a cross-sectional view showing a gas meter 4h manufactured by a gas meter manufacturing method according to still another embodiment of the present invention.

FIG. 58: Gas meter 7 equipped with a unidirectional shutoff valve 706
It is sectional drawing which shows 04.

FIG. 59: Gas meter 8 equipped with a two-way shut-off valve 806
It is sectional drawing which shows 04.

[Explanation of symbols]

4,204,404,504,604,4a, 4b, 4
c, 4d, 4e, 4f, 4g, 4h Gas meter 6, 206 402, 502, 602 Bidirectional shutoff valve 37 Bidirectional shutoff valve control means 44 Switching element 45, 245 Return operation switch 46, 246, 405, 505, 605 Operation Means 47 Magnetic shielding member 50, 418, 518, 618 Permanent magnet piece 52, 410, 510, 610 Operating member

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000142425 Kinmon Manufacturing Co., Ltd. 13-1, Oharacho, Itabashi-ku, Tokyo (72) Inventor Megumi Iwakawa 4-1-2, Hiranocho, Chuo-ku, Osaka-shi, Osaka Osaka Within Gas Co., Ltd. (72) Shuichi Okada, Inventor 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Inside Gas Co., Ltd. (72) Norihiro Fujimoto 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka No. Osaka Gas Co., Ltd. No. 16 Kansai Gas Meter Co., Ltd. (72) Inventor Tatsuya Minami 2-10-16 Higashi Kobashi, Higashi-Nari Ward, Osaka City, Osaka Prefecture Kansai Gas Meter Co., Ltd. (72) Invention Toru Matsuyama 13-1 Ohara-cho, Itabashi-ku, Tokyo Inside Kinmon Manufacturing Co., Ltd. (56) References JP-A-11-271129 (JP, A) JP-A 8-11055 (JP, A) JP-A 8-42729 (JP, A) JP-A-5-118457 (JP, A) JP-A-2-27741 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 35/00 F16K 27 / 00 F16K 17/36 G01F 3/22

Claims (8)

(57) [Claims] 1. A one-way shut-off valve having a housing, a valve body provided in the housing, and shutting off a gas flow path in response to an abnormal signal, and formed integrally with the housing and interposed in the gas flow path. A partition having an insertion hole, an operating member displaceably mounted in the insertion hole of the partition, and an operating member mounted in a mounting hole formed in the housing, protruding from the housing, and being pressed to operate. A gas meter including a return operation button for pushing back the valve body through the valve to open the gas flow path, and a control means for a one-way shut-off valve for outputting an abnormal signal, and A two-way shut-off valve having a valve body that closes to shut off the gas flow path and opens the gas flow path in response to the return signal; and an operation member and a permanent magnet piece mounted on the mounting hole of the housing. Operator An operating means for displacing the permanent magnet piece by the return operation of the operating member by the operating member; Preparing a control means for a two-way shut-off valve for outputting a signal and a return signal, removing the one-way shut-off valve, the control means for the one-way shut-off valve and the operating member from the housing, and removing the return operation button from the mounting hole of the housing; The two-way shut-off valve and the control means for the two-way shut-off valve are mounted on the housing, the switching element of the return operation switch is electrically connected to the two-way shut-off valve control means, and the operation means of the return operation switch is mounted on the mounting hole of the housing. A method for manufacturing a gas meter, wherein the gas meter is mounted and manufactured. 2. The operating means has an operating member mounted in the mounting hole so as to be displaceable in the axial direction, and the permanent magnet piece is rotated about the axis of the operating member in conjunction with the axial displacement of the operating member. The switching element is mounted in a housing facing a movement path when the permanent magnet piece is angularly displaced, and displaces the operation member in the axial direction as the return operation. The manufacturing method of the gas meter described in the above. 3. The operation member is mounted on the mounting hole so as to be displaceable in an axial direction, the permanent magnet piece is fixedly mounted on the operation member, and the switching element faces a moving path of the permanent magnet piece. The method according to claim 1, wherein the operation member is displaced in the axial direction as the return operation. 4. The operating member is mounted on the mounting hole so as to be angularly displaceable about an axis, the permanent magnet piece is fixedly mounted on the operating member, and the switching element faces a moving path of the permanent magnet piece. The method for manufacturing a gas meter according to claim 1, wherein the operation member is angularly displaced around its axis as the return operation. 5. A magnetic shielding member made of a ferromagnetic material and having an opening at a portion facing a moving path of the permanent magnet piece.
The method for manufacturing a gas meter according to claim 1, wherein the switching element is surrounded. 6. A one-way shut-off valve having a housing, a valve body provided in the housing, and shutting off a gas flow path in response to an abnormal signal, and formed integrally with the housing and interposed in the gas flow path. A partition having an insertion hole, an operating member that is displaceably mounted in the insertion hole of the partition, and a projection that is provided to protrude from the housing. A return operation button for opening the flow path, a gas meter including a unidirectional shut-off valve control means for outputting an abnormal signal, and a gas flow path by closing the insertion hole of the partition in response to the abnormal signal, A bidirectional shutoff valve having a valve element for opening a gas flow path in response to a return signal, a bidirectional shutoff valve control means for outputting an abnormal signal and a return signal, and a switching mode is switched by a change in a magnetic field. Switch Preparing a one-way shut-off valve, a one-way shut-off valve control means and an operating member from the housing, electrically connecting the switching element to a two-way shut-off valve control means; A gas meter is manufactured by mounting the control means for the shut-off valve and the bidirectional shut-off valve, and by displacing the permanent magnet piece outside the housing, the magnetic field near the switching element is changed to switch the switching mode. A method for manufacturing a gas meter, wherein the control means is configured to output a return signal. 7. A one-way shut-off valve having a housing, a valve body provided in the housing, and shutting off a gas flow path in response to an abnormal signal, and formed integrally with the housing and interposed in the gas flow path. A partition having an insertion hole, an operating member that is displaceably mounted in the insertion hole of the partition, and a projection that is provided to protrude from the housing. A return operation button for opening the flow path, a gas meter including a unidirectional shut-off valve control means for outputting an abnormal signal, and a gas flow path by closing the insertion hole of the partition in response to the abnormal signal, A two-way shut-off valve having a valve element for opening a gas flow path in response to a return signal, a control means for the two-way cut-off valve for outputting an abnormal signal and a return signal, and a control means for the two-way cut-off valve. Connected to the press operation By preparing a push button switch for outputting a return signal from the control means for the bidirectional shutoff valve, the unidirectional shutoff valve, the control means for the unidirectional shutoff valve and the operating member are removed from the housing, and the bidirectional shutoff valve is mounted on the housing. And a control means for the two-way shut-off valve is mounted, the push-button switch is electrically connected to the control means for the two-way shut-off valve, and the push-button switch is mounted on or incorporated in the housing. A method for manufacturing a gas meter, comprising: mounting a push button capable of pressing a switch, or providing a push button switch outside a housing. 8. A one-way shut-off valve having a housing, a valve provided in the housing, and shutting off a gas flow path in response to an abnormal signal, and formed integrally with the housing and interposed in the gas flow path. A partition having an insertion hole, an operating member that is displaceably mounted in the insertion hole of the partition, and a projection that is provided to protrude from the housing. A return operation button for opening the flow path, a gas meter including a unidirectional shut-off valve control means for outputting an abnormal signal, and a gas flow path by closing the insertion hole of the partition in response to the abnormal signal, And a bidirectional shutoff valve having a valve body for opening a gas flow path in response to a return signal, a bidirectional shutoff valve control means for outputting an abnormal signal and a return signal, and a switch having a string. From unidirectional Removing the shut-off valve, the control means for the one-way shut-off valve and the operating member, mounting the two-way shut-off valve and the control means for the two-way shut-off valve on the housing, and electrically connecting the switch to the control means for the two-way shut-off valve. A gas meter manufactured by pulling out a string of the switch to the outside of the housing, and switching the switch by pulling the string to output a return signal from the control means for the bidirectional shutoff valve. Production method.