JP3211934U - Gas meter and gas meter case - Google Patents

Abstract

A gas meter that can be easily maintained is provided. A gas meter (1) has an inlet (12) into which a gas to be measured flows in and an outlet (13) through which the gas flows in, and an upper case body (10) having an opening formed on the front surface, and the flow rate of the gas flowing in. Lower case body 20 in which a device for measurement is accommodated, front cover 40 attached to upper case body 10 so as to cover the opening, and screw that fastens and connects upper case body 10 and lower case body 20 36a-36c. The upper case body 10 is formed with an attachment surface 31 that comes into contact with the front cover 40. The attachment surface 31 is inclined with respect to the traveling direction of the screws 36a to 36c, thereby fastening the screws 36a to 36c. The insertion space for the tool for this is ensured. [Selection] Figure 5

Description

  The present invention relates to a gas meter and a case for a gas meter.

  A gas meter that measures the flow rate of gas is replaced with a new gas meter before a predetermined expiration date has passed. The replaced and removed gas meter is taken out to a factory, where it is inspected and maintained. At that time, the consumable part is replaced with a new part. On the other hand, the case housing each component is cleaned and reused as a new gas meter case.

  The membrane gas meter is the most widely used gas meter among various gas meters. In the future, many membrane gas meters will expire and will need to be replaced. A membrane gas meter is disclosed in Patent Document 1, for example. This membrane gas meter includes a lower case body having a measuring chamber and an upper case body for storing various electronic components. The lower case body and the upper case body are connected by a plurality of screws.

JP 2017-49074 A

  New electronic parts may be installed in accordance with the maintenance of the removed gas meter. In that case, the dimension of the electronic component after replacement | exchange and a board | substrate may become large, and may not be accommodated in the case for existing gas meters. In addition, an electronic component or a substrate having a large size may become an obstacle when screwed, and the upper case body and the lower case body may not be fastened with screws. In this way, problems may occur when the gas meter is serviced.

  The present invention has been made paying attention to such problems, and an object thereof is to provide a gas meter and a case for the gas meter that can be easily maintained.

  In order to achieve the above object, a gas meter of the present invention includes an upper case body having an inlet into which a gas to be measured flows in, an outlet through which the gas that has flowed in is discharged, and an opening formed on the front surface. A lower case body containing a device for measuring the flow rate of the gas, a cover body attached to the upper case body so as to cover the opening, and the upper case body and the lower case body are tightened The upper case body has a mounting surface that contacts the cover body, and the mounting surface is inclined with respect to the advancing direction of the fastening means. An insertion space for a tool for fastening the fastening means is secured.

  The fastening means is arranged in at least a front row and a rear row, and the upper case body has a left wall constituting a left side portion and a right wall constituting a right side portion, and the left wall and the right wall. All of the fastening means arranged in a front row are disposed between the left wall and the right wall, and has a storage chamber for storing the substrate attached from the opening, partly partitioned by Also good.

  A screw hole for attaching the substrate and a screw hole different from the screw hole used when attaching a substrate having a size different from that of the substrate may be formed in the upper case body.

  The mounting surface may be inclined at the same angle in all regions.

  The cover body is attached in a state where an inclined surface formed at the rear part is in contact with the attachment surface of the upper case body, and the inclination angle of the inclined surface is such that the front surface of the cover body faces forward. An angle may be set.

  In order to achieve the above object, a gas meter case according to the present invention is a gas meter case having an inlet into which a gas to be measured flows in and a discharge port through which the introduced gas is discharged, and an opening is formed on the front surface. The gas meter case is attached from the front so as to cover an insertion hole into which a fastening means for connecting to a case body in which a device for measuring a gas flow rate is accommodated is inserted, and the opening. An abutting surface that abuts the cover body, and the abutting surface is inclined with respect to the insertion direction of the fastening means into the insertion hole, thereby fastening the fastening means. The insertion space for the tool is secured.

  ADVANTAGE OF THE INVENTION According to this invention, the gas meter which can perform maintenance easily, and the case for gas meters can be provided.

It is a front view of the gas meter concerning an embodiment of the invention. It is the perspective view which decomposed | disassembled the upper case body and lower case body of the gas meter which concerns on embodiment of this invention. It is a side view of the upper case body seen from the arrow III in FIG. It is a top view of the upper case body seen from the arrow IV in FIG. 1 is an exploded perspective view of a gas meter according to an embodiment of the present invention. It is a decomposition | disassembly side view of the gas meter seen from the arrow VI in FIG. It is explanatory drawing which showed a mode that the tool was inserted in the screw provided in the upper case body of the gas meter which concerns on embodiment of this invention, (a) is a perspective view, (b) is in (a). It is sectional drawing cut | disconnected by sectional line BB. It is a perspective view for demonstrating the modification ((a), (b)) of the upper case body of the gas meter which concerns on embodiment of this invention. It is a figure for demonstrating the modification of the upper case body of the gas meter which concerns on embodiment of this invention, (a) is a perspective view, (b) is the side view seen from the arrow b in (a).

  A gas meter and a gas meter case according to the present invention will be described below with reference to the drawings. In the following description, in order to facilitate understanding, the front direction in FIG. The description will be made in the vertical and horizontal directions.

(Schematic configuration of gas meter)
FIG. 1 is a front view of a gas meter 1 according to an embodiment of the present invention. The gas meter 1 is a membrane gas meter that measures the flow rate of city gas, which is an example of a fluid to be measured. The gas meter 1 includes a case 100 and various mechanical parts and electronic parts described later in the case 100. The case 100 includes an upper case body 10, a lower case body 20 that is screwed to the upper case body 10, a front cover 40 that is a cover body that covers the front surface of the upper case body 10, and terminals that are exposed from the front cover 40. And a terminal cover 50 to be covered. Connected to the upper part of the upper case body 10 are an inflow pipe 2 into which a gas flows and a discharge pipe 3 for discharging the inflowed gas. The flow rate of the gas flowing in through the inflow pipe 2 is measured by the gas meter 1 and supplied to a supply destination such as a home through the discharge pipe 3. The measured gas flow rates are integrated, and the integrated amount can be viewed through a display window 41 formed in the front cover 40.

(Details of gas meter structure)
Next, the detailed structure of the gas meter 1 will be described with reference to FIGS. FIG. 2 is an exploded perspective view of the upper case body 10 and the lower case body 20 of the gas meter according to the embodiment of the present invention. FIG. 3 is a side view of the upper case body 10 as viewed from the arrow III in FIG. FIG. 4 is a top view of the upper case body 10 as viewed from the arrow IV in FIG. FIG. 5 is an exploded perspective view of the gas meter 1 according to the embodiment of the present invention. FIG. 6 is an exploded side view of the gas meter 1 as viewed from the arrow VI in FIG. In the following description, the structural details of the lower case body 20 and the upper case body 10 will be described first, and then the structure of the substrate 60, the front cover 40, and the terminal cover 50 attached to the upper case body 10 from the front. Details will be described.

  The lower case body 20 is manufactured, for example, by filling an aluminum alloy into a mold and molding, that is, aluminum die casting. A housing chamber 21 for housing various components is formed in the lower case body 20. A flange portion 22 that contacts the lower end of the upper case body 10 is formed at the upper end of the lower case body 20. Six screw holes 23 a to 23 f are formed in the flange portion 22.

  The structure of the lower case body 20 and various parts accommodated in the lower case body 20 are the same as those of the conventional membrane gas meter. Although illustration of each component is omitted, the storage chamber 21 of the lower case body 20 is provided with two weighing chambers separated by a movable film. Due to the inflow of gas from the inflow pipe 2 shown in FIG. 1 and the discharge of gas from the exhaust pipe 3 shown in FIG. 1, a pressure difference is generated in the two measuring chambers, and the movable membrane moves. The movement of the movable film is detected to calculate the gas flow rate.

  Similarly to the lower case body 20, the upper case body 10 is manufactured, for example, by filling an aluminum alloy into a mold and molding, that is, aluminum die casting. On the upper surface of the upper case body 10, an inflow port 12 and a discharge port 13 projecting upward are formed. The inflow pipe 2 shown in FIG. 1 is connected to the inflow port 12, and the discharge pipe 3 shown in FIG. 1 is connected to the discharge port 13. A handle 14 for carrying the gas meter 1 is provided on the upper surface of the upper case body 10.

  The upper case body 10 is formed with a storage chamber 11 for storing various electronic components. Note that there is no wall on the front side of the upper case body 10, and the front of the storage chamber 11 is open. The front end portion of the upper case body 10 has a rectangular frame shape, and forms an attachment surface (contact surface) 31 that comes into contact with the front cover 40 shown in FIG. The mounting surface 31 is formed by a continuous end surface in front of the left wall 33, the right wall 34, the bottom plate 37, and the upper plate 71. Four screw holes 32 for attaching the front cover 40 are formed in the attachment surface 31. In the storage chamber 11 of the upper case body 10, a pressure sensor 15 that detects the pressure of the gas supplied from the gas pipe, and a shutoff valve 16 that shuts off the supply of gas when an earthquake occurs or an abnormality occurs in the gas pressure. Is provided. Further, three screw holes 17, 18, 19 for attaching a substrate 60 (described later) shown in FIG. 5 are formed in the storage chamber 11.

  As shown in FIG. 3, the attachment surface 31 with which the upper case body 10 contacts the front cover 40 is an inclined surface that is inclined by an angle θ with respect to the vertical direction. Here, the vertical direction is the direction with respect to the gas meter 1, and the traveling direction Y of the screws 36a to 36f when the screws 36a to 36f connecting the upper case body 10 and the lower case body 20 are tightened or loosened. Matches. Furthermore, the advancing direction Y coincides with the insertion direction of the screws 36a to 36f with respect to the screw insertion holes 35a to 35f formed in the upper case body 10 shown in FIG. The mounting surface 31 formed in this way faces obliquely upward. In the present embodiment, the angle θ is set to approximately 10 °. As described above, the front end surface of the upper case body 10 is an inclined surface facing obliquely upward, whereby the left wall 33 and the right wall 34 shown in FIG. 2 constituting the side surface of the upper case body 10 are substantially trapezoidal. Make.

  As shown in FIG. 4, six screw insertion holes 35 a to 35 f corresponding to the six screw holes 23 a to 23 f shown in FIG. 2 formed in the lower case body 20 are formed in the bottom plate 37 of the upper case body 10. ing. Among these, the screw insertion holes 35 a to 35 c provided in the front row are arranged along the front side of the bottom plate 37 and are located in a region sandwiched between the left wall 33 and the right wall 34. Therefore, when the front cover 40 is attached to the upper case body 10, the screw insertion holes 35a to 35c cannot be visually recognized from the outside.

  On the other hand, the screw insertion holes 35 d to 35 f provided in the rear row are arranged along the rear side of the bottom plate 37. The screw insertion holes 35 d to 35 f are formed outside the wall body that constructs the storage chamber 11. Therefore, the screw insertion holes 35d to 35f in the rear row can always be visually recognized from the outside. Around the screw insertion holes 35 d to 35 f of the upper case body 10, recessed portions 55 and corner dropping portions 38 and 39 are formed. Thereby, the space for inserting the tool for screw fastening is ensured.

  As shown in FIG. 5, the substrate 60 includes a liquid crystal panel 61 for displaying various information, a return switch 62 for starting the supply of the gas that has been stopped, a seismic sensor 63 for detecting the shaking of the earthquake, a pressure sensor 15 and the like. This is a printed circuit board provided with a connector 64 for connecting to an internal device, a connection terminal 65 for connecting to an external device, and various circuits. The liquid crystal panel 61 displays the accumulated amount of gas used and the state of the gas meter such as whether or not the gas is being supplied. One screw insertion hole 60 a is formed in the substrate 60. The board 60 is attached to the upper case body 10 by tightening the screws 66 inserted into the screw insertion holes 60 a into the screw holes 18 formed in the upper case body 10.

  The front cover 40 is a cover body that is attached to the upper case body 10 from the front and protects each component housed inside. The front cover 40 is formed with a transparent display window 41 for visually recognizing the display content of the liquid crystal panel 61 and an opening 42 for the connection terminal 65. The display window 41 is made of, for example, a transparent synthetic resin, and is disposed in front of the liquid crystal panel 61. The opening 42 is an opening for exposing the connection terminal 65 to the front surface when the front cover 40 is attached to the upper case body 10. Since the connection terminal 65 is exposed to the front surface, the connection between the external device and the connection terminal 65 is facilitated. Further, the front cover 40 is provided with a return button 43 for restarting the supply of gas that has been stopped due to occurrence of an earthquake or detection of an abnormality in the gas pressure. The return button 43 and the return switch 62 are interlocked, and gas supply is started when the return button 43 is pressed.

  As shown in FIG. 6, the front cover 40 has an attachment surface 46 formed of an inclined surface inclined by an angle θ with respect to the vertical direction in accordance with the inclination of the attachment surface 31 of the upper case body 10. On the other hand, the front surface of the front cover 40 is configured by a plane parallel to the vertical direction in consideration of visibility from the display window 41 shown in FIG. 5 and connectivity between the external device and the connection terminal 65. Therefore, the front cover 40 becomes thinner from the upper part toward the lower part. In other words, the mounting surface 46 is an inclined surface that is inclined at an angle that allows the front surface of the front cover 40 to face forward without being inclined. When attaching the front cover 40 to the upper case body 10, as shown in FIG. 5, the screws 45 inserted through the four screw insertion holes 44 are tightened into the screw holes 32 formed in the upper case body 10.

  As shown in FIG. 5, the terminal cover 50 is screwed to the front cover 40 with screws 51. The terminal cover 50 covers and protects the connection terminals 65 exposed from the front cover 40.

(Replacement and maintenance of the gas meter 1 that has expired)
Next, a procedure for exchanging and maintaining the gas meter 1 that has reached the expiration date will be described. The gas meter 1 that has reached its expiration date is removed from the inflow pipe 2 and the exhaust pipe 3 shown in FIG. 1 and replaced with a new gas meter. Transport the removed gas meter 1 to a maintenance shop or the like for maintenance. The removed gas meter 1 is disassembled and inspected, and parts that need replacement are replaced with new parts. The gas meter 1 continues to be used for a long period until the expiration date is reached. In the meantime, various new technologies are developed. New parts incorporating the technology thus developed are incorporated into the gas meter 1 under maintenance as necessary. On the other hand, the upper case body 10 and the lower case body 20 are reused as a case body of a new gas meter after being cleaned. When the replacement of parts and the cleaning of the case body are completed, the gas meter 1 is assembled. When integrating the separated upper case body 10 and lower case body 20, first, as shown in FIG. 2, the corresponding screw holes 23 a to 23 f and the screw insertion holes 35 a to 35 f are matched. And screw 36a-36f is inserted and it tightens using a tool. Thereby, the upper case body 10 and the lower case body 20 are integrated. Then, the board | substrate 60, the front cover 40, and the terminal cover 50 which are shown in FIG. 5 are attached. In this way, the gas meter 1 is serviced. The serviced gas meter 1 is replaced with a gas meter that has reached its expiration date, and is used until the newly set expiration date is reached.

  In addition, even if it is going to incorporate a new part with a big dimension according to maintenance of a gas meter, sufficient accommodation space may not be ensured in the upper case body of the removed gas meter. In this case, the upper case body can be replaced with the upper case body 10 of the gas meter 1 while the lower case body of the removed gas meter is used as it is. A new board or component is attached to the upper case body 10 to be replaced, and the upper case body 10 and the existing lower case body of the gas meter are combined. Thus, the arrangement | positioning of the screw insertion holes 35a-35f of the upper case body 10 replaced | exchanged needs to be the same arrangement | positioning as what was formed in the existing gas meter to remove.

(Effects of embodiments to which the present invention is applied)
The effect of the embodiment to which the present invention is applied will be described with reference to FIG. FIG. 7 is an explanatory view showing a state in which the tool 72 is inserted into a screw provided in the upper case body 10 of the gas meter according to the embodiment of the present invention, (a) is a perspective view, (b). FIG. 3 is a cross-sectional view taken along a cross-sectional line BB in FIG. In order to facilitate understanding of the effects of the present invention, a simplified upper case body 10 is shown in FIG. In the gas meter 1, the front end surface 33 a of the left wall 33 constituting a part of the mounting surface 31 is positioned outside the screw 36 a and is positioned at the left end portion of the upper case body 10. Similarly, the front end surface 34 a of the right wall 34 constituting a part of the mounting surface 31 is positioned outside the screw 36 c and is positioned at the right end portion of the upper case body 10. In this way, the left wall 33 and the right wall 34 are separated to a position where the three screws 36a, 36b, 36c arranged in the front row are sandwiched from the outside. Thereby, the lateral width W of the entrance of the storage chamber 11 that stores the substrate 60 and the like can be made larger. Thus, by making the entrance of the storage chamber 11 large, it is possible to easily attach and detach components housed therein, and to easily maintain the gas meter 1.

  In addition, a part incorporating a newly developed technology when the gas meter 1 is used may be introduced into the gas meter 1 under maintenance. At this time, the dimensions of new parts and substrates to be introduced are larger than those before replacement, and it may be difficult to install or difficult to install on the gas meter under maintenance. However, since the gas meter 1 according to the present invention can have a large inlet dimension of the storage chamber 11, it is easy to install even if it is a component having a large dimension.

  Further, the front end surface 33 a of the left wall 33 is brought close to the left end portion of the upper case body 10, and the front end surface 34 a of the right wall 34 is brought close to the right end portion of the upper case body 10. Therefore, it is possible to prevent interference with the screws 36a and 36c without forming notches or depressions in the left wall 33 and the right wall 34. Thereby, the structure of the upper case body 10 can be simplified.

  7B, the front end surface 71a of the upper plate 71 is disposed at a position retracted by a distance L with respect to the front end surface 37a of the bottom plate 37 by inclining the mounting surface 31. be able to. Thereby, the insertion space of the tool 72 for screw fastening inserted from the upper direction of the screws 36a-36c is securable. Thereby, it is possible to easily tighten or loosen the screws 36a to 36c using the tool 72, and to easily maintain the gas meter 1.

  Further, the attachment surface 31 of the upper case body 10 and the attachment surface 46 of the front cover 40 shown in FIG. 6 are inclined at the same inclination angle θ in all regions. Therefore, the adhesion when the front cover 40 is attached to the upper case body 10 can be enhanced, and the entry of dust and water can be suppressed.

  The upper case body 10 has two screw holes 17 and 19 in addition to the screw holes 18 for attaching the substrate 60. This makes it possible to stabilize the installed board by appropriately setting the position and number of screw holes to be screwed, even when changing the dimensions and weight of the newly installed board during maintenance. Can do. For example, when mounting a large and heavy board, it may be screwed using two screw holes 17 and 19 that are separated from each other, or all three screw holes 17, 18, and 19 may be used. It may be screwed. Further, when a substrate having a medium size and weight is attached, it may be screwed using screw holes 18 and 19 that are appropriately separated. Moreover, when attaching a light board | substrate with a small dimension, you may screw using any one of the three screw holes 17, 18, and 19.

  Moreover, the arrangement | positioning of the screw insertion holes 35a-35f of the upper case body 10 is made into the same arrangement | positioning as what was formed in the existing gas meter to remove, and the upper case body 10 which concerns on this invention, and the existing gas meter below Can be combined with the case body. For example, such a measure can be taken when a new board or component cannot be attached to the upper case body of an existing gas meter, or when the installation work is difficult. In this case, a new board or component may be attached to the upper case body 10 and the upper case body 10 may be combined with the lower case body of the existing gas meter. Thereby, maintenance of gas meter 1 can be performed easily.

(About other forms)
The present invention is not limited to the above embodiment, and various modifications and applications are possible. Although the membrane gas meter has been exemplified as the above embodiment, the present invention can be applied to other types of gas meters. For example, it can be applied to an ultrasonic gas meter. In addition to measuring the gas supplied to the home, the present invention can also be applied to a gas meter that measures business gas supplied to an office, factory, or the like. The gas to be measured is not limited to city gas, and may be a gas meter that measures propane gas.

  In addition, the inclination angle θ of the mounting surface formed on the upper case body is not particularly limited in order to ensure a space for inserting a tool and a space for fastening work, for example, 5 ° or more, It is set to less than 45 °. As a tool used for fastening work, a manual tool or a power tool is assumed.

  Moreover, although the screw has been described as an example of the fastening means for connecting the upper case body and the lower case body, for example, bolts such as hexagon bolts may be adopted as the fastening means.

  Further, a rubber packing may be sandwiched between the upper case body 10 and the front cover 40 to further improve the water tightness.

  Next, modified examples of the gas meter and the gas meter case will be described. In the modification described below, only the configuration of the upper case body is different from the configuration of the above embodiment. Therefore, in each drawing, only the upper case body is illustrated. Moreover, the structure different from the said form among the structures of an upper case body shall be demonstrated below. FIG. 8 is a perspective view for explaining modifications ((a) and (b)) of the upper case bodies 110 and 210 of the gas meter according to the embodiment of the present invention. FIG. 9 is a view for explaining a modification of the upper case body 310 of the gas meter according to the embodiment of the present invention, where (a) is a perspective view and (b) is an arrow b in (a). It is the side view seen.

(Modification 1)
In the upper case body 110 shown in FIG. 8A, the screw 136a on the left side of the front row is located outside the left wall 133, and the screw 136c on the right side of the front row is located outside the right wall 134. It differs from the upper case body 10 in the form. The left wall 133 and the right wall 134 have a bent shape so as to avoid interference with the screws 136a and 136c. Thereby, the insertion space of the tool 72 which fastens the screws 136a and 136c is ensured. Further, the attachment surface 131 that is the front end surface of the upper case body 110 is an inclined surface that is inclined with respect to the vertical direction. Thereby, the insertion space of the tool 72 for fastening can be ensured above the screw 136b. Thereby, it is possible to easily tighten or loosen the screws 136a to 136c using the tool 72, and to easily maintain the gas meter 1.

(Modification 2)
The upper case body 210 shown in FIG. 8B is different from the upper case body 10 in the above-described form, and the mounting surface 231 of the upper case body 210 is not inclined and faces forward. On the other hand, the upper case body 210 has a height capable of accommodating the screw fastening tool 72 therein. Thus, by increasing the height of the upper case body 210, the screws 236a to 236c can be easily tightened or loosened using the tool 72 inserted into the upper case body 210. Further, since the left wall 233 is positioned at the left end of the upper case body 210 and the right wall 234 is positioned at the right end of the upper case body 210, the entrance of the storage chamber for storing various parts is greatly increased. Can take. Thereby, maintenance of a gas meter can be performed easily.

(Modification 3)
As shown in FIGS. 9A and 9B, the upper case body 310 is formed with a stepped stepped portion 370 at the front end. The screws 336a to 336c are disposed on the stepped bottom plate 371. Therefore, a space for inserting the tool 72 is formed above the screws 336a to 336c. Thereby, it is possible to easily tighten or loosen the screws 336a to 336c using the tool 72. Further, since the left wall 333 is positioned at the left end of the upper case body 310 and the right wall 334 is positioned at the right end of the upper case body 310, the entrance of the storage chamber for storing various components is greatly increased. Can take. Thereby, maintenance of a gas meter can be performed easily.

  Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but the scope of the invention described in the claims of the utility model registration and the equivalent scope thereof including.

DESCRIPTION OF SYMBOLS 1 Gas meter 10 Upper case body 11 Storage chamber 12 Inflow port 13 Outlet port 17, 18, 19 Screw hole 20 Lower case body 23a-23f Screw hole 31 Mounting surface (contact surface)
33 Left wall 34 Right wall 35a-35f Screw insertion hole 36a-36f Screw (fastening means)
40 Front cover (cover body)
60 Substrate 61 LCD panel 72 Tool

Claims (6)

An upper case body having an inflow port through which a gas to be measured flows in and an exhaust port through which the inflowed gas is discharged, and an opening formed on the front surface;
A lower case body containing a device for measuring the flow rate of the gas flowing in;
A cover body attached to the upper case body so as to cover the opening;
Fastening means for fastening and connecting the upper case body and the lower case body,
The upper case body is formed with a mounting surface that comes into contact with the cover body,
Since the mounting surface is inclined with respect to the traveling direction of the fastening means, a space for inserting a tool for fastening the fastening means is secured.
A gas meter characterized by that. The fastening means are arranged at least in the front row and the rear row,
The upper case body has a left wall that constitutes a left side portion and a right wall that constitutes a right side portion, and a substrate attached from the opening, partly partitioned by the left wall and the right wall. Has a storage room for storage,
All the fastening means arranged in the front row are arranged between the left wall and the right wall,
The gas meter according to claim 1. The upper case body is formed with a screw hole for attaching the substrate and a screw hole different from the screw hole used when attaching a substrate having a size different from that of the substrate.
The gas meter according to claim 2. The mounting surface is inclined at the same angle in all regions,
The gas meter according to any one of claims 1 to 3, wherein: The cover body is attached in a state where an inclined surface formed at the rear part is in contact with the attachment surface of the upper case body,
The inclination angle of the inclined surface is set to an angle at which the front surface of the cover body faces forward.
The gas meter according to any one of claims 1 to 4, wherein the gas meter is provided. A gas meter case having an inlet into which a gas to be measured flows in and an outlet through which the gas that has flowed in is discharged, wherein an opening is formed on the front surface,
The gas meter case includes an insertion hole into which a fastening means for connecting to a case body in which a device for measuring a gas flow rate is accommodated, and a cover body attached from the front so as to cover the opening. An abutting surface that abuts, and
Since the contact surface is inclined with respect to the insertion direction of the fastening means into the insertion hole, a space for inserting a tool for fastening the fastening means is secured.
This is a gas meter case.

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