JP2017181471A - Gas meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas meter capable of improving durability in such a manner that no ant may trespass a terminal block chamber.SOLUTION: A gas meter includes: an exterior member 8 covering an external surface of a meter main body 7 in a state that a terminal block opening part 81 for making a terminal block 5 exposed is provided and the terminal block 5 is exposed through the terminal block opening part 81; and a terminal block cover 9 that can be disposed in a state of covering the terminal block 5 and is disposed in a state of covering the terminal block 5, thereby forming a terminal block chamber 10 into which the terminal block 5 is exposed. The terminal block chamber 10 is provided with a lead wire pull-out hole 12 for pulling out a lead wire 4 connected to the terminal block 5 from the terminal block chamber 10 to the outside. At least part in the terminal block cover 9 is constituted by light transmissive material capable of transmitting at least visible light.SELECTED DRAWING: Figure 5

Description

  The present invention comprises a meter main body provided with a flow rate measuring means for measuring a flow rate of gas and exposed in a state in which a terminal block for connecting a lead wire for connection to an external device is exposed, and a terminal block for exposing the terminal block. An opening is provided, and the terminal block is exposed through the terminal block opening, and can be disposed in a state of covering the outer surface of the meter body and in a state of covering the terminal block, and in a state of covering the terminal block. And a terminal block cover that forms a terminal block chamber in which the terminal block is exposed to the interior by the exterior member, and the terminal block cover is detachable from the exterior member or can be opened and closed. It is related with the gas meter by which the lead wire extraction hole for pulling out the lead wire connected to the terminal block room from the terminal block room outside was provided in the terminal block room.

Such a gas meter is provided in the middle of a gas supply pipe that supplies gas to a gas demand destination such as a house, and measures the flow rate of the gas flowing through the gas supply pipe.
In such a gas meter, a terminal block for connecting a lead wire for connection to an external device is provided in the meter body, and the external device is connected to the terminal block by a lead wire so that data can be transferred between the meter and the external device. Can be transmitted and received. Incidentally, examples of the external device include a communication terminal that transmits data via a public communication network and a gas leak alarm.

Then, to connect the external device to the terminal block with the lead wire, either remove the terminal block cover from the exterior member, or position the terminal block cover so as to open the terminal block chamber, so that the terminal block is brought outside. Expose and connect the lead wire to the terminal block. Next, with the lead wire connected to the terminal block pulled out to the outside through the lead wire lead-out hole, attach the terminal block cover to the exterior member, or position the terminal block cover to close the terminal block chamber (For example, refer to Patent Document 1).
Although not explicitly described in Patent Document 1, both the exterior member and the terminal block cover are made of a resin material that does not transmit light.

JP 2014-37968 A

By the way, the terminal block chamber is opened to the outside by the lead wire lead hole, and even if the lead wire is passed through the lead wire lead hole, the inner peripheral portion of the lead wire lead hole and the outer peripheral portion of the lead wire There is a gap between them.
On the other hand, in the conventional gas meter, since the terminal block cover is made of a resin material that does not transmit light, the terminal block chamber is always in a dark state where almost no light enters.

The gas meter is usually installed outdoors. And since ants have the habit of entering into a dark and narrow place, in the conventional gas meter, there are cases where ants enter the terminal block chamber through the lead wire lead-out hole. In order to prevent the entry of ants into the terminal block chamber, even if the gap between the lead wire lead holes is filled with sealing material, the ants may break through the sealing material and enter the terminal block chamber. Ants could not be prevented from entering the room.
When the ants enter the terminal block room, the ant excrement and the eggs laid cause an insulation failure between the lead wires and the terminals provided on the terminal block, and the control unit that controls the operation of the gas meter breaks down. There was a fear, and it was a factor that lowered the durability of the gas meter.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a gas meter that can improve durability by making it difficult for ants to enter the terminal block chamber.

In order to achieve the above object, a gas meter according to the present invention comprises a flow rate measuring means for measuring a flow rate of gas, and a meter main body provided with a terminal block for connecting a lead wire for connection to an external device being exposed. When,
An exterior member for covering the outer surface of the meter body in a state in which the terminal block is exposed through the terminal block opening, the terminal block being exposed through the terminal block opening;
A terminal block cover that can be disposed in a state of covering the terminal block and forms a terminal block chamber in which the terminal block is exposed to the room by the exterior member by being disposed in a state of covering the terminal block. ,
The terminal block cover is attached to the exterior member so as to be detachable or open / close the terminal block chamber,
The terminal block chamber is a gas meter provided with a lead wire lead-out hole for pulling out the lead wire connected to the terminal block from the terminal block chamber to the outside.
At least a portion of the terminal block cover is formed of a light transmissive material capable of transmitting at least visible light.

According to the above characteristic configuration, at least a part of the terminal block cover is made of a light transmitting material capable of transmitting at least visible light, so that at least visible light passes through the terminal block cover and enters the terminal block chamber.
On the other hand, ants have the habit of intruding into dark and narrow places. By making at least visible light enter the terminal block room, it becomes possible to make it difficult for the ants to enter the terminal block room. It is possible to prevent poor insulation between the terminals provided on the lead wire or the terminal block due to excrement or eggs.
Therefore, it has become possible to provide a gas meter that can improve durability by making it difficult for ants to enter the terminal block chamber.

A further characteristic configuration of the gas meter according to the present invention is that the exterior member protrudes toward the terminal block cover, and the terminal block chamber, the main chamber exposing the terminal block, and the lead wire extraction hole are opened. A ridge that divides into the front chamber is provided,
A notch-like or hole-like lead wire insertion portion for inserting the lead wire connected to the terminal block is provided in the protruding portion,
The part which covers at least the said front chamber in the said terminal block cover exists in the point comprised with the said light transmissive material.

According to the above characteristic configuration, the terminal block chamber is partitioned by the protrusions into a main chamber exposing the terminal block and a front chamber in which the lead wire lead hole is opened, and a portion covering at least the front chamber in the terminal block cover However, since it is made of a light-transmitting material, at least visible light can enter the front chamber while preventing light from entering the main chamber.
In other words, by preventing light from entering the main room where the electrical components such as the terminal block are exposed, deterioration of the electrical components in the terminal block room due to light can be suppressed. By making the front room as bright as possible and making the front room as bright as possible, it makes it harder for ants to enter the front room and prevents ants from entering the main room where electrical parts such as terminal blocks are exposed. Can be.
Therefore, the durability of the gas meter can be further improved by making it difficult for the ants to enter the terminal block chamber while suppressing the deterioration of the electrical components exposed in the terminal block chamber due to light.

  A further characteristic configuration of the gas meter according to the present invention is that the exterior member and the terminal are disposed at a location closer to the front chamber than the terminal block in the terminal block chamber, over the entire region in the direction along the longitudinal direction of the protrusion. The sealing member is provided so as to seal between the base cover.

According to the above-described characteristic configuration, the sealing member extends over the entire region in the direction along the longitudinal direction of the protruding portion between the exterior member and the terminal block cover at a location closer to the front chamber than the terminal block in the terminal block chamber. Therefore, the sealing member can block the ant entry path from the front chamber toward the terminal block in the main chamber.
In other words, at least visible light enters the front chamber, making it difficult for ants to enter the front chamber, but in the unlikely event that an ant enters the front chamber, the entry path toward the terminal block is a sealing member. Therefore, it is possible to further suppress the entry of ants from the front chamber to the terminal block in the main chamber.
Accordingly, it is possible to make it more difficult for the ants to penetrate into the terminal block in the terminal block chamber, so that the durability of the gas meter can be further improved.

  A further characteristic configuration of the gas meter according to the present invention is that the entire terminal block cover is made of a resin material that transmits at least visible light as the light transmitting material.

According to the above characteristic configuration, since the entire terminal block cover can be manufactured by molding with a resin material capable of transmitting at least visible light, the terminal block cover component can be simplified by simplifying the manufacturing process of the terminal block cover. Cost can be reduced.
Therefore, it is possible to provide a gas meter capable of improving durability while reducing the price.

  The gas meter which concerns on this invention has the further characteristic structure in the point whose visible light transmittance | permeability of the said light transmissive material is 12 to 15%.

  The inventors of the present invention have intensively studied to suppress the entry of ants into the terminal block chamber, and set the visible light transmittance of the light transmitting material constituting the terminal block cover to be between 12 and 15%. Thus, it has been found that the entry of ants into the terminal block chamber can be effectively suppressed while suppressing deterioration of the electrical components in the terminal block chamber by light as much as possible.

In other words, the higher the visible light transmittance of the light transmissive material, the easier it is for light to enter the terminal block chamber, and the deterioration of the electrical component due to the light becomes stronger, but the visible light transmittance of the light transmissive material is 15% or less. By doing so, it was found that deterioration of the electrical components in the terminal block room due to light can be sufficiently suppressed.
On the other hand, the lower the visible light transmittance of the light transmissive material, the more difficult it is for light to enter the terminal block chamber and the darker the terminal block chamber, so that ants easily enter the terminal block chamber. It has been found that by making the light transmittance 12% or more, ant intrusion into the terminal block chamber can be sufficiently suppressed.

In short, in order to reduce the component cost of the terminal block cover, even if the entire terminal block cover is manufactured by molding with a resin material capable of transmitting at least visible light, the visible light transmittance is between 12 and 15%. It has been found that by setting, it is possible to prevent the ants from entering the terminal block room while sufficiently suppressing deterioration of the electrical components exposed in the terminal block room due to light.
Therefore, by setting the visible light transmittance of the light transmissive material constituting the terminal block cover between 12 and 15%, it is possible to further improve the durability while reducing the price of the gas meter.

  A further characteristic configuration of the gas meter according to the present invention is that the flow rate measuring means includes a measurement flow path for flowing a gas to be flow-measured, and the flow rate of the gas flowing through the measurement flow path is measured by ultrasonic waves. It is in the point comprised by the ultrasonic type which measures using.

According to the above characteristic configuration, the flow rate measurement target gas flows through the measurement flow channel, and the flow rate of the gas flowing through the measurement flow channel is measured using ultrasonic waves.
That is, in the ultrasonic gas meter provided with the ultrasonic flow rate measuring means, it is possible to improve the durability by making it difficult for the ants to enter the terminal block chamber.

Front view of ultrasonic gas meter according to embodiment Right side view of an ultrasonic gas meter according to an embodiment The front view in the state where the terminal block cover of the ultrasonic type gas meter concerning an embodiment was removed Longitudinal right side view of an ultrasonic gas meter according to an embodiment Longitudinal right side view of a main part showing a terminal base room of an ultrasonic gas meter according to an embodiment Bottom view of the main part of the ultrasonic gas meter according to the embodiment The perspective view of the terminal block cover and front panel of the ultrasonic type gas meter which concerns on embodiment Front view of a membrane gas meter according to another embodiment Right side view of a membrane gas meter according to another embodiment The front view of the principal part in the state which removed the terminal block cover of the film | membrane type gas meter which concerns on another embodiment

Hereinafter, an embodiment when the present invention is applied to an ultrasonic gas meter will be described with reference to the drawings.
First, an overall schematic configuration of an ultrasonic gas meter (hereinafter sometimes simply referred to as a gas meter) will be described. 1 is a front view of the gas meter, FIG. 2 is a right side view of the gas meter, FIG. 3 is a front view of the gas meter with the terminal block cover removed, and FIG. 4 is a gas meter. FIG. 5 is a vertical right side view of the main part of the gas meter showing the terminal block chamber, FIG. 6 is a bottom view of the main part of the gas meter, and FIG. 7 is a perspective view of the terminal block cover as viewed from the rear side. FIG. 5 is a perspective view of the front panel as viewed from the front side.

  As shown in FIGS. 1 to 3, the gas meter includes a gas inlet 1, a gas outlet 2, a display unit 3, a terminal block 5 for connecting a lead wire 4 for connection to an external device (not shown), and the like. The gas inlet 1 and the gas outlet 2 are connected in the middle of a gas supply pipe (not shown) for supplying gas to a gas demand destination such as a house. The flow rate of the gas is measured and the measured value is displayed on the display unit 3, and data can be transmitted / received to / from an external device connected via the lead wire 4. Incidentally, examples of the external device include a communication terminal that transmits data via a public communication network and a gas leak alarm.

As shown in FIGS. 1 to 4, the gas meter includes a gas inlet 1, a gas outlet 2, a flow rate measuring means 6 for measuring a gas flow rate, and the like, and a lead wire 4 for connecting to an external device. Meter body 7 provided with terminal block 5 exposed to the front surface, terminal block opening 81 exposing terminal block 5, and terminal block 5 being exposed through terminal block opening 81. The front panel 8 (an example of the exterior member) that covers the front surface portion (an example of the outer surface) of the meter body 7 can be disposed in a state of covering the terminal block 5, and is disposed in a state of covering the terminal block 5. The panel 8 includes a terminal block cover 9 that forms a terminal block chamber 10 in which the terminal block 5 is exposed to the room.
The terminal block cover 9 is detachably attached to the front panel 8 by two terminal block cover mounting screws 11, and the lead wire 4 connected to the terminal block 5 is connected to the terminal block chamber 10. Lead wire lead-out holes 12 are provided for drawing out from the outside.

  Further, a rear panel 13 covering the rear surface portion of the meter body 7 and a lower surface panel 14 covering the lower surface portion of the meter body 7 are attached to and detached from the gas meter by a plurality of rear panel mounting screws 15 and a plurality of lower surface panel mounting screws 16, respectively. It is provided freely.

  In the present invention, at least a part of the terminal block cover 9 is made of a light transmissive material capable of transmitting at least visible light.

Next, explanation will be given for each part of the gas meter.
First, the meter body 7 will be described.
As shown in FIG. 4, in this embodiment, the flow rate measuring means 6 includes a measurement flow path 61 for flowing a gas to be flow-measured, and the flow rate of the gas flowing through the measurement flow path 61 is exceeded. It is configured as an ultrasonic type that measures using sound waves.
Since the ultrasonic flow rate measuring means 6 can be of various known configurations, a detailed description and illustration thereof will be omitted and will be briefly described.
As shown in FIG. 4, the ultrasonic flow rate measuring means 6 includes a flow rate measuring tube 62 having a rectangular cross section and forming a measurement flow channel 61 therein, and an upstream side and a downstream side of the measurement flow channel 17. And a pair of ultrasonic transmission / reception means (not shown) that are arranged at predetermined intervals and alternately transmit ultrasonic waves, and the gas flow rate is determined based on the reception signal of each ultrasonic transmission / reception means. It is comprised so that it may calculate.
The flow rate measuring pipe 62 is assembled to the lower part of the meter body 7 in a posture in which the longitudinal direction is along the left-right direction, and a gas inlet is connected to one end of the flow rate measuring pipe 62 via a connecting pipe (not shown). 1 is connected in communication, and a gas outlet 2 is connected to the other end via a connecting pipe (not shown).

Although not shown in the drawings, the meter main body 7 is cut off to shut off an internal flow path formed by a connecting pipe connecting the gas inlet 1 and the flow rate measuring pipe 62 when an abnormality such as gas leakage occurs. A valve is provided.
As shown in FIGS. 4 and 5, the meter body 7 includes a control unit (not shown) configured by a microcomputer to control the operation of the gas meter, the display unit 3 and the terminal block 5 described above. The control board 17 is assembled with the display unit 3 and the terminal block 5 exposed on the front surface, and as shown in FIGS. 1 and 3, a manually operated return button 18 for releasing the shut-off state of the shutoff valve. Is also assembled in a state exposed to the front.

As shown in FIGS. 3 and 5, the terminal block 5 includes a terminal 51 to which the lead wire 4 can be connected. In this embodiment, six terminals 51 are provided.
As shown in FIGS. 1 and 3, the display unit 3 is configured by, for example, a liquid crystal display device (LCD).

As shown in FIGS. 3, 4, 5, and 7, the front panel 8 is provided with a display unit opening 82 that is positioned in the center above the front panel 8 and exposes the display unit 3. A return button opening 83 that exposes the return button 18 is provided on the right side of the opening 82 and is positioned below the display opening 82 so as to have a substantially rectangular shape in front view. A terminal block chamber recess 84 for forming the chamber 10 is provided, and the terminal block opening 81 described above is provided at an upper position in the terminal block chamber recess 84.
Further, as shown in FIGS. 1, 3, and 7, screws through which front panel mounting screws 19 for mounting the front panel 8 to the front surface of the meter body 7 are inserted into the four corners of the front panel 8. An insertion hole 85 is provided.

As shown in FIGS. 3, 5, 6, and 7, the terminal block chamber recess 84 is provided in the front panel 8 in a form lacking a part of the lower end surface of the front panel 8, and is used for the terminal block chamber. The recessed portion 84 is provided with a cover fitting step 86 for fitting the terminal block cover 9 in a state of being continuously connected over the left opening edge, the upper opening edge, and the right opening edge.
The left and right sides 86a, 86b of the cover fitting step 86 are provided so as to stop at a position above the lower end of the front panel 8.
The left and right sides 86a and 86b of the cover fitting step 86 are provided with screw holes 87 for screwing terminal block cover mounting screws 11 for detachably attaching the terminal block cover 9 to the front panel. ing.

As shown in FIGS. 1 and 4 to 7, the terminal block cover 9 has a rectangular shape that can be fitted into the terminal block chamber recess 84 when viewed from the front, and has a terminal block on the lower end surface of the front panel 8 at the lower end edge. It is configured in a shape having a rearward bending portion 91 that closes a portion lacking in the chamber recess 84.
A lead wire outlet hole notch 92 is provided in the rearward bent portion 91 of the terminal block cover 9 so as to open to the rear edge. In this embodiment, four lead wire lead-out holes 92 are provided.
As shown in FIG. 7, screw insertion holes 93 for inserting the terminal block cover mounting screws 11 are provided on the left and right sides of the terminal block cover 9.

  That is, as shown in FIG. 1 to FIG. 4, the front panel 8 is placed against the front surface of the meter body 7, and the four front panel mounting screws 19 are inserted into each of the four corners of the front panel 8. The front panel 8 exposes the display unit 3 to the front surface through the display unit opening 82 by being inserted into the hole 85 and screwed into a screw hole (not shown) of the meter body 7, and the return button opening The return button 20 is exposed to the front surface through 83, and the terminal block 5 is exposed to the front surface through the terminal block opening 81, and is detachably attached to the front surface of the meter body 7.

  Also, as shown in FIGS. 1 and 4 to 6, the terminal block cover 9 is disposed in a state where the terminal block cover 9 is fitted in the cover fitting step portion 86 of the terminal block chamber recess 84 of the front panel 8. The terminal block cover 9 is inserted into the screw insertion holes 93 and screwed into the screw holes 87 of the left and right sides 86a and 86b of the cover fitting step 86, whereby the terminal block cover 9 is The front panel 8 is detachably attached.

  Although the detailed description and illustration are omitted, the rear panel 13 is also detachably attached to the rear surface portion of the meter body 7 by a plurality of rear panel mounting screws 15, and the lower panel 14 is also attached to the lower surface portion of the meter body 7. It is configured to be detachably attached by a lower panel attaching screw 16.

As shown in FIGS. 4 to 6, when the terminal block cover 9 is attached to the front panel 8 as described above, the terminal block 5 is placed indoors by the terminal block chamber recess 84 of the front panel 8 and the terminal block cover 9. The terminal block chamber 10 exposed to is formed.
Further, the lead wire lead-out hole 12 is formed by the lead wire lead-out hole notch 92 and the front surface portion of the front panel 8 in the backward bent portion 91 of the terminal block cover 9. In this embodiment, four lead wire extraction holes 12 are provided.

As shown in FIG. 3 to FIG. 5 and FIG. 7, in a state extending in the left-right direction across the lower end portion of the left side portion 86 a and the lower end portion of the right side portion 86 b in the terminal block chamber recess 84 of the front panel 8. , A projecting ridge that projects to the front side (terminal block cover 9 side) and divides the terminal block chamber 10 into a main chamber 101 that exposes the terminal block 5 and a front chamber 102 that opens the lead wire lead-out hole 12. A portion (an example of a ridge portion) 88 is provided.
The partitioning ridge 88 is provided with a notch-shaped lead wire insertion portion 88a opened on the front side through which the lead wire 4 connected to the terminal 51 of the terminal block 5 is inserted. Four lead wire insertion portions 88a are also provided in a state corresponding to the four lead wire lead-out holes 12 respectively.

  Furthermore, between the terminal block opening 81 and the partitioning protrusion 88 in the terminal block chamber recess 84 of the front panel 8, it protrudes forward (terminal block cover 9 side) while extending in the left-right direction. A lead wire fixing protrusion 89 is provided, and the lead wire fixing protrusion 89 is provided with a lead wire fixing notch 89a in a state of opening to the front side. Four lead wire fixing notches 89a are also provided in a state corresponding to the four lead wire lead-out holes 12 respectively.

  In attaching the terminal block cover 9 to the front surface portion of the front panel 8, the frame-shaped sealing member 20 having the same shape as the frame-shaped portion formed of the cover fitting step 86 and the partitioning ridge 88 is attached to the front panel. 8, the terminal block cover 9 is attached to the front panel 8 as described above in a state where the terminal block cover 9 is interposed at a position corresponding to the above-described frame-shaped portion. That is, as shown in FIG. 5, the front panel 8 and the terminal block are disposed in the terminal block chamber 10 at a position closer to the front chamber 102 than the terminal block 5 over the entire region in the direction along the longitudinal direction of the partition protrusion 88. The sealing member 20 is provided so as to seal between the cover 9.

The front panel 8, the terminal block cover 9, the rear panel 13 and the lower panel 14 are all manufactured by molding a resin material.
The resin material that molds the front panel 8, the rear panel 13, and the lower panel 14 is a resin material that does not transmit light with a light transmittance of 0, and the resin material that molds the terminal block cover 9 transmits visible light. It is a possible resin material.
That is, the entire terminal block cover 9 is made of a light-transmitting resin material that can transmit at least visible light as a light-transmitting material.
The visible light transmittance of the light-transmitting resin material constituting the terminal block cover 9 is, for example, in the range of 12 to 15%, and in this embodiment is 13.6%.
Incidentally, as the light transmitting resin material constituting the terminal block cover 9, for example, AES (acrylonitrile / ethylene / propylene / diene / styrene) resin can be used.

In the gas meter configured as described above, at least visible light passes through the terminal block cover 9 and enters the terminal block chamber 10, so that the terminal block chamber 10 becomes brighter, so that ants do not easily enter the terminal block chamber 10. Become. Therefore, it is possible to prevent insulation failure from occurring between the lead wires 4 and the terminals 51 provided on the terminal block 5 due to ant eggs and excrement, so that the durability of the gas meter can be improved.
In addition, by manufacturing the terminal block cover 9 by molding with a light-transmitting resin material, the manufacturing process of the terminal block cover 9 that can transmit at least visible light is simplified, and the component cost of the terminal block cover 9 is reduced. Therefore, the price of the gas meter can be reduced.

  Moreover, even if the entire terminal block cover 9 is made of a light-transmitting resin material, the visible light transmittance of the light-transmitting resin material is set between 12 and 15%, so While the deterioration of the electrical component due to light is suppressed as much as possible, the entry of ants into the terminal base chamber 10 can be effectively suppressed.

[Another embodiment]
(A) In the above embodiment, the case where the present invention is applied to an ultrasonic gas meter provided with the ultrasonic flow rate measuring means 6 has been described. However, the present invention, as shown in FIGS. The present invention can also be applied to a membrane gas meter equipped with a membrane flow rate measuring means (not shown).
Since the membrane type flow rate measuring means is well known, detailed description and illustration are omitted, and will be briefly described.
The membrane-type flow rate measuring means includes a pair of measuring chambers partitioned by a diaphragm, a link mechanism that rotates the rotating body by converting the reciprocating motion of the diaphragm into a rotational motion, and the like. Then, the gas is alternately supplied to and discharged from the pair of measuring chambers, the reciprocating motion of the diaphragm accompanying the gas is converted by the link mechanism to rotate the rotating body, and the rotation of the rotating body is detected. It is configured to measure the flow rate.

As shown in FIGS. 8 to 10, this membrane gas meter includes a membrane type flow rate measuring means (not shown) and a terminal block 5 for connecting a lead wire 4 for connection to an external device (not shown). Meter body 7 provided in a state where the terminal block 5 is exposed, and a terminal block opening 81 for exposing the terminal block 5, and the terminal block 5 is exposed through the terminal block opening 81, so that the front surface of the meter body 7 is exposed. A front panel 8 (an example of an exterior member) that covers a portion (an example of an outer surface) and a terminal panel 5 that can be disposed in a state of covering the terminal block 5. The terminal block 5 includes a terminal block cover 9 that forms a terminal block chamber 10 exposed to the room.
The terminal block cover 9 is detachably attached to the front panel 8 with terminal block cover mounting screws 11, and the lead wire 4 connected to the terminal block 5 is connected to the terminal block chamber 10 from the terminal block chamber 10 to the outside. A lead wire extraction hole (not shown) for drawing out is provided.
And the terminal block cover 9 is comprised with the resin material which can permeate | transmit at least visible light as a light transmissive material similarly to said embodiment.

As shown in FIG. 9, the terminal block cover 9 is configured to have a rearward bent portion 91 as in the above embodiment.
8 to 10, reference numerals 1 and 2 denote a gas inlet and a gas outlet, respectively. Reference numeral 3 indicates a display unit, and reference numeral 18 indicates a return button.

(B) In the above embodiment, the case where the terminal block cover 9 is detachably attached to the front panel 8 with the terminal block cover mounting screw 11 is illustrated, but the terminal block cover 9 is attached to the front panel 8. The terminal block chamber 10 may be attached so as to be openable and closable.
In this case, for example, the left side edge of the terminal block cover 9 is supported on the left side edge of the terminal block chamber recess 84 of the front panel 8 so as to be rotatable around the vertical axis. That is, the terminal block chamber 10 can be opened and closed by swinging the terminal block cover 9 with the left edge thereof as the swing axis along the vertical direction.

(C) In the above embodiment, the case where the entire terminal block cover 9 is made of a light transmissive material has been exemplified. However, the portion of the terminal block cover 9 that covers the front chamber 102 of the terminal block chamber 10 is replaced with a light transmissive material. The remaining portion may be made of a material that does not transmit light.

(D) In the above embodiment, the terminal block chamber 10 is partitioned into the main chamber 101 and the front chamber 102, but it is not necessary to partition it.

  Note that the configuration disclosed in the above embodiment (including another embodiment, the same applies hereinafter) can be applied in combination with the configuration disclosed in the other embodiment as long as no contradiction occurs. The embodiments disclosed in this specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

  As described above, it is possible to provide a gas meter that can improve durability by making it difficult for ants to enter the terminal block chamber.

4 Lead wire 5 Terminal block 6 Flow rate measuring means 7 Meter body 8 Front panel (exterior member)
DESCRIPTION OF SYMBOLS 9 Terminal block cover 10 Terminal block chamber 12 Lead wire extraction hole 20 Sealing member 61 Measurement flow path 81 Terminal block opening 88 Division protrusion (protrusion)
88a Lead wire insertion part 101 Main room 102 Front room

Claims (6)

A meter body provided with a flow rate measuring means for measuring the flow rate of gas, and in a state where a terminal block for connecting a lead wire for connecting to an external device is exposed,
An exterior member for covering the outer surface of the meter body in a state in which the terminal block is exposed through the terminal block opening, the terminal block being exposed through the terminal block opening;
A terminal block cover that can be disposed in a state of covering the terminal block and forms a terminal block chamber in which the terminal block is exposed to the room by the exterior member by being disposed in a state of covering the terminal block. ,
The terminal block cover is attached to the exterior member so as to be detachable or open / close the terminal block chamber,
A gas meter provided with a lead wire extraction hole for pulling out the lead wire connected to the terminal block to the outside from the terminal block chamber in the terminal block chamber,
A gas meter in which at least a part of the terminal block cover is made of a light transmitting material capable of transmitting at least visible light. The exterior member is provided with a protrusion that protrudes toward the terminal block cover and divides the terminal block chamber into a main chamber that exposes the terminal block and a front chamber that opens the lead wire lead-out hole. ,
A notch-like or hole-like lead wire insertion portion for inserting the lead wire connected to the terminal block is provided in the protruding portion,
The gas meter according to claim 1, wherein at least a portion of the terminal block cover that covers the front chamber is formed of the light transmitting material.   To seal the gap between the exterior member and the terminal block cover over the entire area in the direction along the longitudinal direction of the protruding portion, at a location closer to the front chamber than the terminal block in the terminal block chamber, The gas meter according to claim 2, wherein a sealing member is provided.   The gas meter according to any one of claims 1 to 3, wherein the entire terminal block cover is made of a resin material capable of transmitting at least visible light as the light transmitting material.   The gas meter according to claim 1, wherein the light transmissive material has a visible light transmittance of 12 to 15%.   The flow rate measuring means includes a measurement flow path for flowing a gas to be flow-measured, and is configured to be an ultrasonic type that measures the flow rate of the gas flowing through the measurement flow path using ultrasonic waves. The gas meter according to any one of claims 1 to 5.

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