JP2013200270A - Gas meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas meter which can be easily switched between a posture for connection of a gas inlet tube and a gas outlet tube from the upper side of the gas meter and a posture for connection of them from the lower side, in a state where an integrated flow rate of gas can be properly displayed on a display part.SOLUTION: On an external part of a casing C of the gas meter, an arm 50A supporting a display part H is connected to a turning shaft 50J freely turnably supported by a support part 50S provided in one or both of a pair of side surfaces 10S, in a state of turning integrally with the turning shaft 50J. The gas meter is configured so as to be switchable, according to the rotation of the turning shaft 50J, between a first posture where the display part H is located on the front side of a front surface 10A and a gas inlet-side connection part 21S and a gas outlet-side connection part 22S are located under the casing C and a second posture where the display part H is located on the rear side of a rear surface 10B and the gas inlet-side connection part 21S and the gas outlet-side connection part 22S are located on the casing C.

Description

  The present invention comprises a casing having a front surface located on the front side and a rear surface located on the rear surface side and a pair of side surfaces connecting the front surface and the rear surface in a front view, and a gas inlet pipe is provided on the bottom surface of the casing. The present invention relates to a gas meter having a gas inlet side connecting portion to be connected and a gas outlet side connecting portion to connect a gas outlet pipe, and having a display portion for displaying an integrated flow rate of measured gas.

  A gas meter for measuring the amount of gas supplied to each consumer from a gas company is installed near the wall of the house in each consumer. In such a gas meter, gas is alternately introduced into or discharged from a pair of measuring chambers divided by a diaphragm, and the reciprocating motion of the diaphragm is converted into rotational motion by a crank, and gas is supplied by a mechanical display unit. Measuring the difference in the propagation time of ultrasonic waves that pass from the upstream side to the downstream side and from the downstream side to the upstream side with respect to the gas that passes through the pipe and the gas that passes through the pipe Thus, there is an ultrasonic gas meter that measures the gas flow rate in the pipe.

Among these, the membrane type gas meter used conventionally has a gas inlet side connecting portion 21S and a gas outlet side connecting portion 22S, a display mechanism 200H, a shut-off valve (not shown), etc. as shown in FIG. Since the first casing 210 having the above mechanism needs to be positioned in the upper part of the gas meter and the second casing 220 having the measuring chamber needs to be positioned in the lower part, it is necessary to connect the gas inlet pipe and the gas outlet pipe from above the membrane gas meter 200 was there.
However, since the gas pipe (especially the gas inlet pipe 21 between the main pipe and the gas inlet side connecting portion 21S) is generally buried in the ground, the gas inlet pipe 21 and the gas outlet pipe are disposed above the membrane gas meter 200. If the gas pipe 22 is positioned, it is necessary to raise the gas pipe from the ground up to above the membrane gas meter 200 at the location where the gas meter is installed, and the piping work becomes complicated. In addition, the gas meter connection side end of the gas outlet pipe 22 needs to be folded downward so as to be connected to the membrane gas meter 200. For example, the gas inlet pipe 21 and the gas outlet pipe 22 extend from the back side to the upper side of the membrane gas meter 200. When installed, the membrane gas meter 200 protrudes to the front by the diameter of the gas pipe, and the space required for installing the gas meter is large. There is a problem that that.
Further, since the gas pipe (gas inlet pipe and gas outlet pipe) is disposed around the membrane gas meter 200 in a state having a plurality of bent portions, there is also a problem that the aesthetic appearance is impaired.

  On the other hand, a gas meter that is not a membrane type, for example, the ultrasonic gas meter does not need to include a second casing that includes a measuring chamber like the above-described membrane type gas meter, and even if the gas meter is turned upside down, the gas flow rate is reversed. This will not interfere with the measurement. That is, it can be arbitrarily configured as to whether the gas inlet side connecting portion and the gas outlet side connecting portion are positioned above or below the measuring portion in the gas meter. However, if the gas inlet side connecting part and the gas outlet side connecting part are configured to be positioned at the upper part of the gas meter and those configured to be positioned at the lower part, respectively, it is necessary to manufacture parts for each. Therefore, there are problems such as an increase in manufacturing cost and complicated management of inventory. Therefore, conventionally, there has been one casing configured so that the gas inlet side connecting portion and the gas outlet side connecting portion can be positioned on either the upper side or the lower side of the gas meter (for example, Patent Document 1).

JP 2005-172479 A

FIG. 7 is a schematic diagram illustrating the configuration of the ultrasonic gas meter disclosed in Patent Document 1. The ultrasonic gas meter 100 includes an inlet side pipe part 101 having a gas inlet side connection part 21S on one end side, an outlet side pipe part 102 having a gas outlet side connection part 22S on one end side, and an inlet side pipe part 101 and an outlet side. A gas flow path portion 100U formed in a substantially U shape by a connecting tube portion 103 that connects the other end sides of the side tube portion 102 is provided inside the casing 100C. The inlet side pipe portion 101 is provided with a shutoff valve 100V that shuts off gas flowing through the inlet side pipe portion 101, and is electrically connected to the control board 100P through a signal conductor. The casing 100C is composed of a casing main body that opens at the front surface during installation, and a casing lid that covers the opening. The casing main body and the casing lid portion are formed in a shape that can be attached even if the upper and lower sides (top and bottom) are reversed.
In the gas meter, since it is dangerous to reversely connect the gas inlet pipe and the gas outlet pipe to the gas inlet side connecting portion and the gas outlet side connecting portion, the gas inlet side connecting portion 21S is positioned on the left side in front view. Since the gas outlet side connecting portion 22S is determined to be located on the right side, the casing body has the inlet side pipe portion 101 on the left side and the outlet side pipe portion 102 on the right side when viewed from the front. Installed as follows.

  The connecting pipe portion 103 is provided with, for example, an ultrasonic flow rate measuring device. Although not shown in the figure, the ultrasonic flow measuring device is provided with an ultrasonic wave transmitting / receiving unit at the upstream end portion and with an ultrasonic wave transmitting / receiving unit at the downstream end portion. The ultrasonic wave transmission / reception unit and the ultrasonic wave transmission / reception unit are electrically connected to the control board 100P with a signal conductor, and transmit ultrasonic waves emitted from the upstream ultrasonic wave transmission / reception unit to the ultrasonic wave transmission / reception unit. The instantaneous flow rate of the gas passing through the connecting pipe portion 103 is calculated from the difference between the time and the propagation time of the ultrasonic wave emitted from the downstream ultrasonic wave receiving / transmitting unit and reaching the ultrasonic wave receiving / transmitting unit. From this, the integrated flow rate of gas is calculated.

  Inside the casing 100 </ b> C, a seismic device 100 </ b> K capable of detecting a vibration in an upright posture is configured to be freely attached. The seismic sensor 100K is electrically connected to the control board 100P through a signal conductor, and when a vibration is detected, a detection signal is input to the control board 100P. Further, the control IC (control unit) mounted on the control board 100P closes the shutoff valve 100V based on the detection signal of the seismic sensor 100K so as to shut off the gas flow in the gas flow path unit 100U. It has become.

On the control board 100P, a display unit 100H such as a liquid crystal that displays the calculated integrated supply amount of gas is mounted and fixedly attached to the inner side of the casing 100C in the casing lid. In addition, a window portion 100W that allows the display content to be visually recognized from the outside of the casing 100C is provided at a position corresponding to the liquid crystal display portion 100H in the casing lid portion. The casing body can be attached to the casing lid portion even when the casing is turned upside down.
Also, one of the upper surface and the lower surface of the casing 100C is provided with a hole portion 100G that communicates the inside and outside of the casing 100C so that the gas inlet side connecting portion 21S and the gas outlet side connecting portion 22S can be extended from the inside of the casing 100C to the outside. It is configured.

When connecting the gas inlet pipe 21 and the gas outlet pipe 22 from the upper side of the gas meter 100 with respect to the gas meter 100 configured in this way, as shown in FIG. The casing 100C is in a state of being located on the upper surface side, and the gas flow passage portion 100U is placed on the left side in a front view with the gas inlet side connecting portion 21S and the gas outlet side connecting portion 22S at the upper end side. It is attached to the casing body in a state where the side pipe portion 101 is located and the outlet side pipe portion 102 is located on the right side, and is further attached to the casing body in a state where the seismic device 100K is in an upright posture. The part is configured to be attached to the casing body in a state where the display on the display unit 100H is appropriate.
Further, when the gas inlet pipe 21 and the gas outlet pipe 22 are connected from the lower side of the gas meter 100, as shown in FIG. 8B, the casing main body is positioned so that the hole 100G is on the lower surface side of the casing 100C. The gas flow channel portion 100U, the gas inlet side connection portion 21S and the gas outlet side connection portion 22S are the lower end side, and the inlet side pipe portion 101 is located on the left side in a front view, It is attached to the casing body in a state where the outlet side pipe portion 102 is positioned on the right side, and further attached to the casing body in a state where the seismic device 100K is in an upright posture, and the casing lid portion is displayed on the display portion 100H. It is comprised so that it may attach to a casing main body in the state which becomes appropriate.

As described above, according to Patent Document 1, when the gas inlet pipe 21 and the gas outlet pipe 22 are connected from the upper side of the gas meter 100 and when they are connected from the lower side, the upper and lower sides of the display unit are changed. It is possible to display properly in the correct state, and further, the seismic device 100K can normally detect vibrations, but it is not necessary to prepare a different casing body in each case, and the manufacturing cost can be reduced. It becomes possible.
However, in such a configuration, when the gas inlet pipe 21 and the gas outlet pipe 22 are connected from the upper side of the gas meter 100 and when connected from the lower side, the gas meter 100 is disassembled to dispose the casing lid portion from the casing body. After removing the gas flow path unit 100U and the seismic device 100K, the gas flow path unit 100U and the seismic sensor are mounted on the casing body so that the display on the display unit 100H is in an appropriate state with the target posture. 100K and the casing lid part had to be reattached, and it took time and effort to switch the posture of connecting the gas inlet and outlet from the upper side and the posture of connecting from the lower side of the gas meter.

  The present invention has been made in view of the above circumstances, and its purpose is to connect the gas inlet pipe and the gas outlet pipe from the upper side of the gas meter while properly displaying the integrated gas flow rate in the display section. The object is to provide a gas meter that can be easily switched between a posture and a posture connected from the lower side.

In order to achieve the above object, the first characteristic configuration of the gas meter according to the present invention includes, in a front view, a front surface located on the front side and a rear surface located on the back surface side, and a pair of side surfaces connecting the front surface and the rear surface. A gas inlet side connecting portion for connecting a gas inlet pipe and a gas outlet side connecting portion for connecting a gas outlet pipe on the bottom surface of the casing, and a display portion for displaying an integrated flow rate of the measured gas With
One or both of the pair of side surfaces is provided with a fulcrum portion that rotatably supports a rotation shaft provided in a state of penetrating into and out of the casing, and an outer portion of the casing on the rotation shaft, An arm connected to the pivot shaft so as to be rotatable together is provided, the display section is supported by the arm, and the display section is moved to the front side of the front surface according to the rotation of the pivot shaft, or And a first posture in which the display unit is located on the front side of the front surface, and the gas inlet side connection part and the gas outlet side connection part are located on the lower side of the casing. The display portion is positioned on the back side of the rear surface, and the posture can be switched between a second posture in which the gas inlet side connecting portion and the gas outlet side connecting portion are located on the upper side of the casing. It is in.

  That is, one or both of the pair of side surfaces of the casing is provided with a rotation shaft that is rotatably supported by the fulcrum portion, and an arm that is connected to the rotation shaft so as to be integrally rotatable is provided on the outer portion of the casing. Since the display unit is supported by the arm, the gas meter with the gas inlet side connecting portion positioned on the left side in front view and the gas outlet side connecting portion positioned on the right side in front view. When the gas inlet side connection part and the gas outlet side connection part are switched between the attitude where the gas inlet side connection part and the gas outlet side connection part are located on the lower side of the casing and the attitude where the gas inlet side connection part and the gas outlet side connection part are located on the upper side of the casing. However, it is possible to easily switch to a state where the display unit is located on the front side by a simple operation of rotating the arm around the rotation axis.

  In addition, in a gas meter, it is dangerous to reversely connect the gas inlet pipe and the gas outlet pipe to the gas inlet side connection part and gas outlet side connection part. The gas outlet side connecting portion is positioned on the right side. For this reason, with the gas inlet side connecting portion positioned on the left side in front view and the gas outlet side connecting portion positioned on the right side in front view, the orientation of the gas meter is changed to the gas inlet side connecting portion and the gas outlet side. When switching between a posture where the connecting portion is located on the lower side of the casing and a posture where the gas inlet side connecting portion and the gas outlet side connecting portion are located on the upper side of the casing, the front surface and the rear surface are interchanged. Since the display unit is positioned on the front side of the front face so that it can be viewed in front view before switching the posture, the gas inlet side connecting part and the gas outlet side connecting part are located on the lower side of the casing as described above. The display unit is positioned on the back side when viewed from the front, only by switching between the positioned posture and the posture where the gas inlet side connecting portion and the gas outlet side connecting portion are located on the upper side of the casing. Become.

  According to the first characteristic configuration, as described above, the posture in which the gas inlet side connecting portion and the gas outlet side connecting portion are located on the lower side of the casing, and the gas inlet side connecting portion and the gas outlet side connecting portion are located on the upper side of the casing. When switching between postures, the display unit can be easily switched between the state of being located on the front side of the front surface and the state of being located on the back side of the rear surface by rotating the arm around the rotation axis. Therefore, when the gas inlet pipe 21 and the gas outlet pipe 22 are connected from the lower side of the gas meter, the display unit is located on the front side of the front surface, and the gas inlet connecting part and the gas outlet connecting part are located on the lower side of the casing. By setting it as the 1st attitude | position located in this, a display part can be made into the state which can be visually recognized by front view. When the gas inlet pipe 21 and the gas outlet pipe 22 are connected from the upper side of the gas meter, the display part is located on the rear side of the rear surface, and the gas inlet connection part and the gas outlet connection part are located on the upper side of the casing. By setting it as the 2nd attitude | position to perform, a display part can be made into the state which can be visually recognized by front view. Then, the first posture and the second posture can be easily switched by a simple operation of turning the arm around the turning shaft.

  In short, according to the first characteristic configuration, it is easy to connect the gas inlet pipe and the gas outlet pipe from the upper side of the gas meter and the posture of connecting from the lower side while properly displaying the gas flow rate in the display unit. The gas meter which can be switched to can be provided.

  A gas meter according to the present invention has a second characteristic configuration in addition to the first characteristic configuration described above, wherein a seismic device capable of sensing a vibration in an upright posture is provided in a state of rotating integrally with the rotary shaft, When the seismoscope senses a vibration, it is configured to block the gas flow from the gas inlet pipe to the gas outlet pipe.

  That is, since the seismoscope capable of detecting vibrations in the upright posture rotates integrally with the rotation shaft, the display unit and the display unit can be used even when the gas meter is switched between the first posture and the second posture. The seismic device can be put in an upright posture in conjunction with it. Therefore, even when the posture of the gas meter is switched, the first posture and the second posture can be changed without requiring a special operation for setting the seismoscope capable of detecting vibration in the upright posture to the upright posture. It is possible to put the seismic device in an appropriate posture simply by rotating the arm to switch.

  According to a third characteristic configuration of the gas meter according to the present invention, in addition to the first or second characteristic configuration, a wall surface of the casing that faces the bottom surface is formed in a semi-cylindrical shape along a rotation locus of the display unit. There is in point.

  That is, by making the wall surface facing the bottom surface of the casing into a semi-cylindrical shape along the rotation trajectory of the display unit supported by the arm, the display unit is located on the front side of the front surface, and the gas inlet side connection unit and the gas Between the 1st attitude | position in which an exit side connection part is located in the casing lower side, and the 2nd attitude | position in which a display part is located in the back surface side of a rear surface, and a gas inlet side connection part and a gas outlet side connection part are located in the casing upper side Thus, the volume of the casing can be maximized in a state where the arm and the display portion supported by the arm can be rotated.

  The fourth characteristic configuration of the gas meter according to the present invention is, in addition to any of the first to third characteristic configurations, a locking portion that holds the display unit in either the first posture or the second posture. Is in the point provided.

  That is, since the display unit can be held in either the first posture or the second posture, the display unit is held in an appropriate posture even when the first posture and the second posture are switched. It is possible to keep.

Front view of ultrasonic gas meter Side view of ultrasonic gas meter Diagram showing the internal configuration of an ultrasonic gas meter The figure which shows the 1st attitude | position of an ultrasonic gas meter The figure which shows the 2nd attitude | position of an ultrasonic gas meter Diagram showing membrane gas meter The figure which shows the internal structure of the conventional ultrasonic gas meter The figure which shows the attachment form of the conventional ultrasonic gas meter

Next, an embodiment when the present invention is applied to an ultrasonic gas meter will be described with reference to the drawings. FIG. 1 is a front view of an ultrasonic gas meter, and FIG. 2 is a side view thereof.
The ultrasonic gas meter 10 includes a casing C having a front surface 10A located on the front side in a front view, a rear surface 10B located on the back surface side, and a pair of side surfaces 10S connecting the front surface 10A and the rear surface 10B. . The bottom surface 10 </ b> T of the casing C includes a gas inlet side connection portion 21 </ b> S that connects the gas inlet pipe 21 and a gas outlet side connection portion 22 </ b> S that connects the gas outlet pipe 22.

  As shown in FIG. 3, inside the casing C, an inlet side pipe part 31 provided with a gas inlet side connection part 21S on one end side, an outlet side pipe part 32 provided with a gas outlet side connection part 22S on one end side, and A gas flow path portion 30U formed in a substantially U shape is provided by a connecting pipe portion 33 that connects the other end sides of the inlet side pipe portion 31 and the outlet side pipe portion 32 to each other. The gas inlet side connecting portion 21S and the gas outlet side connecting portion 22S are fixedly attached to through holes provided in the bottom surface 10T of the casing C, and the gas inlet pipe 21 is screwed to the gas inlet side connecting portion 21S with a fitting nut. The gas outlet pipe 22 is similarly connected to the gas outlet side connecting portion 22S by screwing a joint nut.

  The inlet side pipe portion 31 is provided with a shutoff valve 41 that shuts off the flow of gas therein. In addition, an ultrasonic wave transmitting / receiving unit S1 is provided at the upstream end in the connecting pipe portion 33, and an ultrasonic wave transmitting / receiving unit S2 is provided at the downstream end.

  As shown in FIGS. 1 to 3, a pair of side surfaces 10 </ b> S is provided with a fulcrum portion 50 </ b> S that rotatably supports a rotation shaft 50 </ b> J provided in a state of penetrating inside and outside of the casing C, and the rotation shaft 50 </ b> J. A pair of left and right arms 50 </ b> A connected to the rotation shaft 50 </ b> J so as to be rotatable together is provided on the outer portion of the casing C of FIG. The ends opposite to the fulcrum 50S of the pair of left and right arms 50A are connected by a long plate-like connection member 50B. Thus, the rotation shaft 50J, the pair of left and right arms 50A, and the connection member 50B rotate integrally with respect to the casing C with the fulcrum portion 50S as the rotation fulcrum.

A liquid crystal type display unit H is provided to display the accumulated flow rate of the measured gas while being supported by the connecting member 50B. As shown in FIG. 1, the display unit H is configured by a liquid crystal display device provided with, for example, a 7-segment display unit, and is configured to display 4 digits after the decimal point and 3 digits after the decimal point. And it is comprised so that an appropriate display (namely, the display which does not reverse top and bottom) can be performed by the erect posture which upper part Hu of the display part H is located in an upper end side, and the lower part Hd is located in a lower end side.
Further, the liquid crystal display device is electrically connected to the control board S by a signal cable. The rotating shaft 50J and the arm 50A are formed in a hollow shape, and the signal cable from the control board S to the display unit H is disposed so as to pass through the inside of the rotating shaft 50J and the arm 50A. Yes.

As shown in FIG. 3, the seismic device K is provided so as to rotate integrally with the rotation shaft 50 </ b> J in a state of being located inside the casing C. The seismic sensor K is configured to be able to detect vibrations in an upright posture in which the upper Ku is located at the upper end and the lower Kd is located at the lower end.
The display unit H and the seismic device K are configured to have the same phase with respect to the rotation of the rotation shaft 50J. In the display unit H, the upper Hu is positioned at the upper end and the lower Hd is positioned at the lower end. The seismic device K is also configured such that the upper Ku is located at the upper end and the lower Kd is located at the lower end.

  A stopper magnet Hst as a locking portion is attached to the surface of the display portion H facing the casing C. Further, a stopper magnet 10Ast provided in a state of being attracted to the stopper magnet Hst is attached to a portion where the display portion H on the front surface 10A of the casing C is to be located, and a portion where the display portion H is to be located on the rear surface 10B is attached. A stopper magnet 10Bst provided so as to be attracted to the stopper magnet Hst is attached. Thereby, even if the display part H is moved to either the front surface 10A side or the rear surface 10B side of the casing C in accordance with the turning operation of the arm 50A, the display part H can be held at a position where the display part H should be positioned. In addition, the seismic device K can be held in an upright posture.

The ultrasonic transmission / reception units S1 and S2 are electrically connected to a control board S attached inside the casing C. The control board S has an ultrasonic wave propagation time from the ultrasonic wave receiving / transmitting unit S1 to the ultrasonic wave transmitting / receiving unit S2, and an ultrasonic wave emitted from the ultrasonic wave receiving / transmitting unit S2 to the ultrasonic wave receiving / transmitting unit S1. The instantaneous flow rate of the gas passing through the connecting pipe portion 103 is calculated from the difference from the propagation time of the gas, and the integrated gas flow rate is calculated from the instantaneous flow rate.
In addition, the control board S is configured to transmit a signal to the display unit H so that the measured integrated flow rate of the gas is displayed on the display unit H described above.

The control board S is electrically connected to the shutoff valve 41 by a valve control cable, and is configured to supply electric power for opening and closing the shutoff valve 41.
When the seismic device K detects vibration, the control board S is configured to close the shutoff valve 41 based on the detection signal.

  A wall surface 10R facing the bottom surface 10T in the casing C is formed in a semi-cylindrical shape along the rotation trajectory of the arm 50A and the display portion H supported by the arm 50A. Therefore, the display unit H can be arranged on the front surface side of the front surface 10A or the back surface side of the rear surface 10B along the wall surface 10R formed in a semi-cylindrical shape according to the rotation of the rotation shaft 50J.

(Usage mode of ultrasonic gas meter according to the present invention)
A usage mode of the ultrasonic gas meter according to the present invention configured as described above will be described with reference to FIGS.
When the gas inlet pipe 21 and the gas outlet pipe 22 are connected from the lower side of the ultrasonic gas meter 10, as shown in FIGS. 4 (a) and 4 (b), the casing C and the bottom face 10T are the lower ends of the casing 10C. It is in a state located on the side. Then, as shown in FIG. 4B, the arm 50A is positioned on the front surface 10A side, and the display portion is placed at a predetermined position on the front surface 10A by the action of the stopper magnet Hst on the display portion H side and the stopper magnet 10Ast on the casing C side. Let H stand still. Thus, in the state where the display unit H is positioned on the front side of the front surface 10A and the gas inlet side connection unit 21S and the gas outlet side connection unit 22S are in the first posture positioned below the casing C, the display unit H and the feeling The seismic device K has an upright posture in which the upper Hu in the display unit H and the upper Ku in the seismic device K are positioned at the upper end, and the lower Hd in the display unit H and the lower Kd in the seismic device K are positioned at the lower end. Can do.

  Further, when the gas inlet pipe 21 and the gas outlet pipe 22 are connected from the upper side of the ultrasonic gas meter 10, as shown in FIGS. 5 (a) and 5 (b), the casing C and the bottom face 10T are the casing 10C. It is in a state located on the upper end side. Then, as shown in FIG. 5 (b), the arm 50A is positioned on the rear surface 10B side, and the display portion is placed at a predetermined position on the rear surface 10B by the action of the stopper magnet Hst on the display portion H side and the stopper magnet 10Bst on the casing C side. Let H stand still. Accordingly, in the state where the display unit H is positioned on the rear surface side of the rear surface 10B and the gas inlet side connection unit 21S and the gas outlet side connection unit 22S are positioned on the upper side of the casing C, the display unit H and the vibration sensing The device K may have an upright posture in which the upper Hu in the display unit H and the upper Ku in the seismic device K are positioned at the upper end, and the lower Hd in the display unit H and the lower Kd in the seismic device K are positioned at the lower end. it can.

  Further, the switching between the first posture and the second posture can be performed only by a simple operation of simply rotating the arm 50A between the front surface 10A and the rear surface 10B as described above. Accordingly, the display unit H is positioned on the front side of the front surface 10A, the gas inlet side connection unit 21S and the gas outlet side connection unit 22S are positioned below the casing C, and the display unit H is the rear surface of the rear surface 10B. The display part H and the seismic device K are located at the upper part of the display part H in any case of the second posture in which the gas inlet side connection part 21S and the gas outlet side connection part 22S are located on the upper side of the casing C. It is possible to have an upright posture in which the upper Ku of the Hu and the seismic device K is positioned at the upper end, and the lower Hd of the display unit H and the lower Kd of the seismic device K are positioned at the lower end. In addition, the action of the stopper magnets Hst, 10Ast, and 10Bst as the locking portions that hold the display portion H in either the first posture or the second posture makes the display portion H and the seismic device K upright properly. It can be held.

[Another embodiment]
(1) In the above embodiment, the fulcrum portion 50S that rotatably supports the rotation shaft 50J is provided on the pair of left and right side surfaces 10S, and the rotation shaft 50J and the rotation shaft 50J are provided on the outer portion of the casing C of the rotation shaft 50J. The pair of left and right arms 50A connected to be integrally rotatable is provided. However, the present invention is not limited to such a configuration. For example, the fulcrum part 50S and the arm 50A are provided only on one side of the pair of left and right side surfaces 10S. The display unit H may be supported in a cantilever manner.

(2) In the above-described embodiment, the configuration using the seismic device K capable of detecting vibrations in an upright posture is not limited to such a configuration. You may use what can detect a vibration in such a posture.

(3) In the above embodiment, the configuration in which the wall surface 10R facing the bottom surface 10T in the casing C is formed in a semi-cylindrical shape along the rotation trajectory of the display unit H is exemplified, but the configuration is limited to such a configuration. Instead, the fulcrum part 50S may be positioned at the upper end or the lower end of the casing C, and the semi-cylindrical wall surface 10R may not be provided, and the wall surface 10R does not protrude outward from the turning locus of the display unit H. What is necessary is just to be comprised.

(4) In the above embodiment, the stopper magnet Hst is provided on the display portion H side as the locking portion for holding the display portion H in either the first posture or the second posture, and the stopper magnet 10 Ast on the casing C side and Although the structure which provides the stopper magnet 10Bst was illustrated, it is not limited to such a structure, For example, the metal piece which can adsorb | suck one side of the stopper magnet Hst or the stopper magnet 10Ast, or the stopper magnet 10Bst to a stopper magnet You may comprise as follows. Moreover, various locking structures can be employed, such as a configuration in which the display portion H is held in either the first posture or the second posture by the engagement of the locking pieces biased by the elastic pieces. .

(5) In the above embodiment, the case where the present invention is applied to an ultrasonic gas meter has been described. However, the present invention is not limited to such a configuration, and a thermal flow sensor is used in addition to the ultrasonic gas meter. The present invention can be applied to various gas meters other than a gas meter that cannot be used upside down, such as a conventional gas meter.
Moreover, although the said embodiment demonstrated the case where this invention was applied to a gas meter, it is not limited to a gas meter, You may apply to the flow meter which measures the flow volume of various fluids other than gas.

(6) In the above embodiment, the casing C is configured by integrating all of the front surface 10A, the rear surface 10B, and the pair of side surfaces 10S. However, for example, one side surface 10S may be integrated with the front surface 10A, the other side surface 10S may be integrated with the rear surface 10B, and these members may be combined to form the casing C. Furthermore, the front surface 10A, the rear surface 10B, and the pair of side surfaces 10S may all be separate bodies, and these may be combined to form the casing C. That is, in the description of the present application, “casing C having front surface 10A located on the front side in front view, rear surface 10B located on the back side, and a pair of side surfaces 10S connecting front surface 10A and rear surface 10B”. In the description of “connection” regarding the front surface 10A, the rear surface 10B, and the pair of side surfaces 10S, an arbitrary part (or combination of parts) is separately formed in addition to a configuration in which all of these are integrated. The structure which combined is included.

  According to the present invention, it is easy to connect the gas inlet pipe 21 and the gas outlet pipe 22 from the upper side of the gas meter and the attitude of connecting from the lower side in a state where the display of the integrated gas flow rate can be appropriately performed on the display unit H. The gas meter which can be switched to can be provided.

DESCRIPTION OF SYMBOLS 10 Ultrasonic gas meter 10A Front surface 10B Rear surface 10C Casing 10R Wall surface 10S Side surface 10T Bottom surface 21 Gas inlet pipe 21S Gas inlet side connection part 22 Gas outlet pipe 22S Gas outlet side connection part 50A Arm 50J Rotating shaft 50S Supporting point C Casing H Display part K seismoscope

Claims (4)

In front view, comprising a casing having a front surface located on the front side and a rear surface located on the back surface side, and a pair of side surfaces connecting the front surface and the rear surface;
On the bottom surface of the casing, it has a gas inlet side connecting part for connecting a gas inlet pipe and a gas outlet side connecting part for connecting a gas outlet pipe,
A gas meter having a display unit for displaying the accumulated flow rate of the measured gas,
One or both of the pair of side surfaces is provided with a fulcrum portion that rotatably supports a rotation shaft provided in a state of penetrating into and out of the casing, and an outer portion of the casing on the rotation shaft, An arm connected to the rotation shaft so as to be rotatable together;
The display unit is configured to be supported by the arm, and the display unit is configured to be arranged on the front side of the front surface or the back side of the back surface according to the rotation of the rotation shaft.
A first posture in which the display unit is located on a front side of the front surface, and the gas inlet side connecting part and the gas outlet side connecting part are located on a lower side of the casing;
A gas meter configured to be switchable between a second posture in which the display unit is located on the rear surface side of the rear surface and the gas inlet side connecting portion and the gas outlet side connecting portion are located on the upper side of the casing. A seismoscope capable of detecting vibrations in an upright posture is provided in a state of rotating integrally with the rotating shaft,
The gas meter according to claim 1, wherein the gas meter is configured to cut off a gas flow from the gas inlet pipe to the gas outlet pipe when the seismic device senses a vibration.   The gas meter according to claim 1 or 2, wherein a wall surface of the casing facing the bottom surface is formed in a semi-cylindrical shape along a rotation locus of the display unit.   The gas meter according to any one of claims 1 to 3, further comprising a locking portion that holds the display unit in either the first posture or the second posture.

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