Communication device mounting jig for main unit case

Abstract

We provide a communication device mounting jig for the main body case that can be attached to the meter body, which is a supplier asset. [Solution] The gas meter, including the portion that clamps the flange 3, has two opposing first planar portions and second planar portions that are configured to clamp the flange 3, and a third planar portion that connects the first planar portion and the second planar portion, forming a U-shape with the first planar portion, the second planar portion and the third planar portion, and having a receiving opening for receiving the flange 3 at a position opposite to the third planar portion; a spring plate holding portion 37 that is U-shaped in cross-section and joins with the third planar portion of the spring plates 21 and 22 to hold the spring plates 21 and 22; and a communication device mounting portion 13 that has a communication device mounting hole 16 for mounting a communication device 8 capable of communicating information related to the gas flowing inside the gas meter.

Description

TECHNICAL FIELD

[0001] The present invention relates to a mounting jig used for attaching a communication device to a main body case of a gas meter or the like. BACKGROUND ART

[0002] Some gas meters, water meters, and electricity meters are equipped with communication functions, which enable internal information transmission, alarm call transmission in the event of an abnormality, remote meter operation, and the like via communication. For communication, a separate externally attached communication device provided by a gas, water, or electricity supplier is required, and the communication device is mounted on piping around the meter or the like.

[0003] As a communication device mounting jig for a main body case for mounting such a communication device on various meters, for example, it is conceivable to use a gas meter fixing bracket disclosed in Patent Document 1. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0004] PATENT DOCUMENT 1 Japanese Unexamined Patent Application Publication No. 2024-69880 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] When a communication device is mounted using the gas meter fixing bracket disclosed in Patent Document 1, the communication device is attached to gas piping around the gas meter. However, since the gas piping around the gas meter is customer-owned property, the gas supplier needs to obtain the customer's permission when attaching the communication device to the gas piping.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a communication device mounting jig for a main body case that can be attached to a meter main body which is supplier-owned property. MEANS FOR SOLVING THE PROBLEMS

[0007] To achieve the above objective, the characteristic configuration of the communication device mounting jig for the main body case according to the present invention is as follows: A communication device mounting jig for a gas meter, which has a flange protruding from the main body case, and is attached to the main body case, In a cross-sectional view along the vertical direction of the gas meter, including the clamping portion of the flange, A spring plate having two opposing first and second planar portions that can clamp the flange, and a third planar portion connecting the first and second planar portions, forming a U-shape, and having a receiving opening for receiving the flange at a position opposite the third planar portion, The spring plate holding portion, which is U-shaped in the cross-sectional view, is joined to the third planar portion of the spring plate and holds the spring plate, The distinguishing feature is that it has a communication device mounting section equipped with a communication device mounting hole for attaching a communication device capable of transmitting information related to the gas flowing inside the gas meter.

[0008] According to the above characteristic configuration, the spring plate has a first planar portion, a second planar portion, and a third planar portion connecting the first and second planar portions. In a cross-sectional view along the vertical direction of the gas meter, including the flange clamping portion, the first, second, and third planar portions form a U-shape. Therefore, the spring plate can clamp the flange of the gas meter between the first and second planar portions. The spring plate holder is joined to the third planar portion of the spring plate and is configured to hold at least a portion of each of the first and second planar portions of the spring plate, as well as the third planar portion. By holding the spring plate, the spring plate holder can prevent plastic deformation of the spring plate. The communication device mounting section, which is equipped with a communication device mounting hole, allows the communication device to be attached, for example, by screwing it in. Because of the above configuration, the communication device mounting jig for the main case can be attached to the main case of the gas meter by clamping the flange portion protruding from the main case with the spring plate of the communication device mounting jig for the main case.

[0009] In addition to the above-described feature configuration, the piping communication device mounting jig according to the present invention, In the aforementioned cross-sectional view, It is preferable that the spring plate has a cantilevered extension that swings outward while biased toward the internal space formed between the first and second planar portions, with a point provided on at least one of the first and second planar portions as the pivoting starting point.

[0010] According to the above characteristic configuration, the spring plate has a cantilevered extension portion provided on at least one of the first planar portion and the second planar portion, formed between the first planar portion and the second planar portion, and biased toward the internal space. When the flange is sandwiched between the first planar portion and the second planar portion of the spring plate, the cantilevered extension portion is pushed in the direction opposite to the direction toward the internal space. As a result, a force toward the internal space is applied to at least one of the first planar portion and the second planar portion that has the cantilevered extension portion. As a result, the clamping force between the first and second planar sections of the flange becomes greater, allowing the communication device mounting jig for the main body case to be more securely installed on the main body case of a gas meter or the like.

[0011] In addition to the above-described feature configuration, the communication device mounting jig for the main body case according to the present invention, In the aforementioned cross-sectional view, It is preferable that the spring plate is configured to have an engaging portion at the receiving port that protrudes toward the internal space formed between the first planar portion and the second planar portion and engages with the flange.

[0012] According to the above-described configuration, the spring plate is provided with an engaging portion that protrudes toward the internal space and engages with the flange at a position facing the third planar portion. Since this engaging portion engages with grooves, recesses, etc., in the flange, the communication device mounting jig for the main case can be firmly installed by the main case of a gas meter or the like.

[0013] In addition to the above-described feature configuration, the communication device mounting jig for the main body case according to the present invention, The spring plate comprises a first spring plate capable of clamping a first flange having a predetermined thickness in cross-section, and a second spring plate capable of clamping a second flange having a greater thickness in cross-section than the first flange. Preferably, the spring plate holding portion is configured to be able to hold both the first spring plate and the second spring plate.

[0014] According to the above-described configuration, the communication device mounting jig for the main case holds multiple spring plates of different sizes in the spring plate holding section, thereby firmly clamping each flange having a different thickness with the spring plates held in the spring plate holding section of the communication device mounting jig for the main case. Therefore, the communication device mounting jig for the main case of this invention can be firmly installed on the main case of various gas meters.

[0015] In addition to the above-described feature configuration, the communication device mounting jig for the main body case according to the present invention, In the mounting state in which the flange is received into the receiving port of the spring plate, It is preferable to position the spring plate, the spring plate holding portion, and the communication device mounting portion at different locations in orthogonal directions that are perpendicular to both the direction in which the flange is received into the receiving port and the vertical direction.

[0016] According to the above-described configuration, in the mounting state in which the flange is received into the spring plate inlet, the spring plate and spring plate holder and the communication device mounting part are positioned at different locations in orthogonal directions that are perpendicular to both the direction in which the flange is received into the inlet and the vertical direction. Therefore, the mounting positions of the spring plate and spring plate holder to the gas meter and the position of the communication device mounting part can be offset in the orthogonal directions. Accordingly, even in a situation where the mounting positions of the spring plate and the spring plate holding portion to the gas meter must be near the display unit of the gas meter, it is possible to prevent the communication device from overlapping the display unit of the gas meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] [Figure 1] It is a front view showing a state where a communication device is attached to a gas meter using the communication device mounting jig for a main body case. [Figure 2] It is an exploded perspective view when a communication device is attached to a gas meter using the communication device mounting jig for a main body case. [Figure 3] It is a cross-sectional view showing a state where a communication device is attached to a gas meter using the communication device mounting jig for a main body case. [Figure 4] It is a plan view of the first spring plate and the second spring plate. [Figure 5] It is a perspective view of the second spring plate. [Figure 6] It is cross-sectional views before and after clamping the flange of the main body meter with the spring plate of the communication device mounting jig for a main body case. [Figure 7] It is a diagram showing another embodiment of the communication device mounting jig for a main body case. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In the following description, "the cross-sectional view along the vertical direction of the gas meter 1 including the clamping portion of the flange 3" means viewing from the direction of arrow R or arrow L in FIGS. 1 and 2, or from the front side direction or the back side direction of the paper surface in FIGS. 3 and 6.

[0019] A communication device mounting jig 10 for a main body case according to an embodiment of the present invention includes spring plates 21 and 22, a spring plate holding portion 37, and a communication device mounting portion 13, and is used for installing the communication device mounting jig 10 for a main body case to which a communication device 8 is attached on the main body case 2 by clamping the flange 3 protruding from the main body case 2 of the gas meter 1 with the spring plates 21 and 22.

[0020] <Gas meter configuration> Figure 1 shows a gas meter 1 through which, for example, city gas 13A flows, and the gas meter 1 has a main body case 2. The main case 2 houses a diaphragm-type flow measurement unit (not shown). The flow measurement unit comprises a pair of metering chambers (not shown) separated by a diaphragm (not shown), and a link mechanism (not shown) that converts the reciprocating motion of the diaphragm into rotational motion to rotate a rotating body. Gas is alternately supplied to and discharged from the pair of metering chambers, and the reciprocating motion of the diaphragm associated with the supply and discharge of gas is converted into rotational motion of the rotating body (not shown) by the link mechanism. The gas flow rate is measured based on the detection of the rotational motion of the rotating body. Furthermore, the main body case 2 is provided with a gas inlet 6 to which a gas pipe (not shown) is connected, and a gas outlet 7 to which a gas pipe (not shown) is connected, and a display unit 5 is provided on the front part 2c of the main body case 2.

[0021] The gas meter 1 has a flange 3 that protrudes from the main body case 2. As shown in Figure 2, the flange 3 protruding from the main body case 2 has grooves 4 formed along the main body case 2 on the upper and lower sides of the flange 3, on the base end side of the flange 3.

[0022] <Spring plate configuration> The communication device mounting jig 10 for the main case has a first spring plate 21 and a second spring plate 22 as spring plates 21 and 22. The first spring plate 21 and the second spring plate 22 have the same configuration except for the horizontal extension portion 60. For this reason, the configuration of spring plates 21 and 22 will be described using the second spring plate 22 below, and the description of the first spring plate 21 may be omitted. Also, among the configurations of the first spring plate 21, those configurations that the second spring plate 22 also has may be given the same reference numerals as those of the second spring plate 22.

[0023] As shown in Figures 3 to 5, the second spring plate 22 is configured to clamp the flange 3 with two opposing first planar portions 30 and second planar portion 31 in a cross-sectional view along the vertical direction of the gas meter 1, including the portion that clamps the flange 3, and also has a third planar portion 32 connecting the first planar portion 30 and the second planar portion 31, forming a U-shape with the first planar portion 30, the second planar portion 31 and the third planar portion 32, and has a receiving opening 39 for receiving the flange 3 at a position opposite the third planar portion 32.

[0024] The second spring plate 22 includes a cantilevered extension 33a that swings outward while biased toward the internal space 38 formed between the first planar portion 30 and the second planar portion 31, with a point on the first planar portion 30 as the pivoting starting point 35a, and a cantilevered extension 33b that swings outward while biased toward the internal space 38, with a point on the second planar portion 31 as the pivoting starting point 35b.

[0025] Furthermore, the second spring plate 22 has engagement portions 36 on the receiving port 39 side, with the first planar portion 30 and the second planar portion 31 each having engagement portions 36. The engagement portions 36 can engage with the groove 4 on the base end side of the flange 3, and by engaging the engagement portions 36 with the groove 4, the communication device mounting jig 10 for the main case can be firmly installed by the main case 2.

[0026] The second spring plate 22 has a gripping portion 40 on the side opposite to the side of the engaging portion 36 of the first planar portion 30 that is joined to the first planar portion 30. The gripping portion 40 of the first planar portion 30 extends in the direction of arrow U, and by pulling the gripping portion 40 of the first planar portion 30 in the direction that releases the clamping state of the flange 3 by the first planar portion 30 and the second planar portion 31 (in the direction of arrow U), the communication device mounting jig 10 for the main body case can be easily removed from the main body case 2 by pulling the gripping portion 40 of the first planar portion 30 in the direction of arrow F. Furthermore, the second spring plate 22 has a gripping portion 40 on the side of the engaging portion 36 of the second planar portion 31 that is opposite to the side that joins with the second planar portion 31. The gripping portion 40 of the second planar portion 31 extends in the direction of arrow D, and by pulling the gripping portion 40 of the second planar portion 31 in the direction that releases the clamping state of the flange 3 by the first planar portion 30 and the second planar portion 31 (direction of arrow D), and pulling the communication device mounting jig 10 for the main body case in the direction of arrow F, the communication device mounting jig 10 for the main body case can be easily removed from the main body case 2.

[0027] Furthermore, the second spring plate 22 has a pivoting starting point 35c on the third planar portion 32 and has two horizontal extensions 60 that extend pivotably toward the internal space 38 while being biased. The two horizontal extensions 60 are configured to open like double doors, and when the flange 3 is inserted into the internal space 38 of the second spring plate 22, the tip of the flange 3 is pushed back in the opposite direction to the insertion direction of the flange 3 into the second spring plate 22 (direction of arrow B), thereby fixing the position of the flange 3 relative to the communication device mounting jig 10 for the main body case along the insertion direction axis of the flange 3.

[0028] Furthermore, as shown in the cross-sectional view of Figure 3, the distance (L1) between the first planar portion 30 and the second planar portion 31 of the first spring plate 21 is longer than the distance (L2) between the first planar portion 30 and the second planar portion 31 of the second spring plate 22. Furthermore, as shown in the plan view of Figure 4, the length (L3) of the first spring plate 21 along the insertion direction axis of the flange 3 is longer than the length (L4) of the second spring plate 22 along the insertion direction axis of the flange 3.

[0029] Because the first spring plate 21 and the second spring plate 22 have the configuration described above, the internal space 38 of the first spring plate 21 is larger than the internal space 38 of the second spring plate 22. Therefore, the second spring plate 22 can clamp the first flange, which has a predetermined thickness in a cross-sectional view along the vertical direction of the gas meter 1 including the clamping portion of the flange 3, whereas the first spring plate 21 can clamp the second flange, which is thicker than the first flange, in a cross-sectional view along the vertical direction of the gas meter 1 including the clamping portion of the flange 3.

[0030] <Structure of the spring plate holding part> As shown in Figure 3, the spring plate holding portion 37 has a U-shaped portion in a cross-sectional view along the vertical direction of the gas meter 1, including the clamping portion of the flange 3, and is joined to the third planar portion 32 of the first spring plate 21 and the second spring plate 22, respectively. The spring plate holding portion 37 then holds the spring plate 20 in a manner that surrounds at least a part of the first planar portion 30 and the second planar portion 31, as well as the third planar portion 32. Furthermore, in a plan view, the spring plate holding portion 37 has the first spring plate 21 and the second spring plate 22, which are the spring plates 21 and 22, with their respective first planar portions 30 and second planar portions 31 overlapping.

[0031] The spring plate holding portion 37 holds the spring plates 21 and 22, preventing plastic deformation of the spring plates 21 and 22. This prevents the clamping force between the first planar portion 30 and the second planar portion 31 of the spring plates 21 and 22 on the flange 3 from decreasing, thus extending the service life of the communication device mounting jig 10 for the main body case.

[0032] <Configuration of the communication device mounting section> The communication device mounting section 13 has a communication device mounting hole 16 for mounting a communication device 8 capable of transmitting information related to the gas flowing inside the gas meter 1, such as city gas 13A. The communication device mounting section 13 is located at the end of the elongated section 45 (towards the tip in the direction of arrow D) below the spring plate holding section 37 (towards the tip in the direction of arrow D) in the vertical direction of the gas meter 1, including the clamping portion of the flange 3. Then, as shown in Figure 2, the communication device 8 can be attached to the communication device mounting section 13 by inserting a screw through a screw hole (not shown) provided on the communication device 8 and screwing it into the communication device mounting hole 16 and tightening it.

[0033] The first spring plate 21 and the second spring plate 22 have the same configuration except for the horizontal extension portion 60. For this reason, the method of attaching and removing the communication device mounting jig 10 for the main case to the main case 2, and the method of clamping the flange 3 with the second spring plate 22 will be explained below using the second spring plate 22, and a detailed explanation of the case using the first spring plate 21 will be omitted.

[0034] <Method for attaching the communication device mounting jig for the main unit case to the main unit case> Figure 2 is an exploded perspective view showing the installation of the communication device 8 into the main body case 2 of the gas meter 1 by clamping the flange 3 with the second spring plate 22 of the communication device mounting jig 10 for the main body case. By attaching the communication device 8 to the communication device mounting jig 10 for the main case, and with the flange 3 in contact with the receiving opening 39 of the second spring plate 22, the communication device mounting jig 10 for the main case is pushed in the direction from the tip side to the base side of the flange 3 (direction of arrow B), as shown in Figure 3, the flange 3 can be clamped by the second spring plate 22, and the communication device mounting jig 10 for the main case can be attached to the main case 2.

[0035] <How to remove the communication device mounting jig for the main unit case from the main unit case> The communication device mounting jig 10 for the main case, which is attached by clamping the flange 3 of the main case 2 with the second spring plate 22, can be easily removed from the main case 2 by gripping the gripping parts 40 provided on the first planar part 30 and the second planar part 31 and pulling it in the direction that releases the clamping state of the flange 3 between the first planar part 30 and the second planar part 31 (direction of arrow U or arrow D). In this state, the communication device mounting jig 10 for the main case can be easily removed from the main case 2 by pulling it in the direction from the base end to the tip end of the flange 3 (direction of arrow F).

[0036] <Method of clamping a flange with a spring plate> As shown in the upper part of Figure 6, by bringing the flange 3 close to the receiving port 39 of the second spring plate 22 of the main case communication device mounting jig 10, and pushing the main case communication device mounting jig 10 in the direction from the tip side to the base side of the flange 3 (direction of arrow B), the flange 3 can be clamped by the second spring plate 22 of the main case communication device mounting jig 10, as shown in the lower part of Figure 6. The mechanism by which the second spring plate 22 clamps the flange 3 will be described in detail below.

[0037] By pressing the communication device mounting jig 10 for the main case against the flange 3, the flange 3 enters the internal space 38 of the spring plates 21 and 22. As a result, the cantilevered extension 33a, which is attached to the first planar portion 30 and biased toward the internal space 38, is pushed toward the first planar portion 30, and the cantilevered extension 33b, which is attached to the second planar portion 31 and biased toward the internal space 38, is pushed toward the second planar portion 31. Then, as the cantilevered extension 33a of the first planar portion 30 is pushed toward the first planar portion 30, the first planar portion 30 is pushed toward the internal space 38. Also, as the second planar portion 31 is pushed toward the second planar portion 31, the second planar portion 31 is pushed toward the internal space 38. As a result, the force that clamps the flange 3 between the first planar portion 30 and the second planar portion 31 becomes stronger. Furthermore, as the first planar portion 30 and the second planar portion 31 are pushed toward the internal space 38, the engaging portions 36 of the first planar portion 30 and the second planar portion 31 engage more firmly with the groove 4 provided in the flange 3.

[0038] The two horizontal extensions 60, which have a pivoting point 35c on the third planar portion 32 and extend pivotably toward the internal space 38 while biased, push back the tip of the flange 3 in the opposite direction (direction of arrow B) to the insertion direction of the flange 3 into the second spring plate 22 when the flange 3 is inserted into the internal space 38 of the second spring plate 22. This generates a reaction force in the direction of arrow F on the second spring plate 22 having the horizontal extensions 60. As a result, the position of the flange 3 relative to the communication device mounting jig 10 for the main case can be fixed along the insertion axis of the flange 3.

[0039] <Another Embodiment> (1) In this embodiment, the mounting target of the communication device mounting jig 10 for the main body case is the main body case 2 of a gas meter 1 that houses a membrane-type flow measurement unit. However, the mounting target of the communication device mounting jig 10 for the main body case may also be the main body case 2 of a gas meter 1 that houses an ultrasonic-type flow measurement unit.

[0040] (2) In this embodiment, the communication device mounting portion 13 is located below the spring plate holding portion 37 in the vertical direction of the gas meter 1, including the clamping portion of the flange 3 (towards the tip in the direction of arrow D). However, the communication device mounting portion 13 may also be configured to be located above the spring plate holding portion 37 in the vertical direction of the gas meter 1, including the clamping portion of the flange 3 (towards the tip in the direction of arrow U).

[0041] (3) In this embodiment, the spring plate holding portion 37 and the communication device mounting portion 13 are joined via an elongated portion 45, but in another embodiment, the communication device mounting jig 10 for the main body case may be configured without an elongated portion 45.

[0042] (4) In this embodiment, the spring plates 21 and 22 each have a cantilevered extension 33 on the first planar portion 30 and the second planar portion 31. However, in another embodiment, the spring plates may have a cantilevered extension 33 on only one of the first planar portion 30 or the second planar portion 31, or neither the first planar portion 30 nor the second planar portion 31 may have a cantilevered extension 33.

[0043] (5) In this embodiment, the spring plates 21 and 22 have engaging portions 36, but in another embodiment, the spring plate 20 may be configured not to have an engaging portion 36.

[0044] (6) In this embodiment, the communication device mounting jig 10 for the main case has two spring plates, a first spring plate 21 and a second spring plate 22. However, in another embodiment, the communication device mounting jig 10 for the main case may have only one spring plate, or it may have three or more spring plates.

[0045] (7) As shown in Figure 7, in addition to the above-described characteristic configuration, the communication device mounting jig 10 for the main case may also be configured such that, in the mounting state in which the flange 3 is received into the receiving openings 39 of the spring plates 21 and 22 (not shown in Figure 7), the spring plates 21 and 22 and the spring plate holding portion 37 and the communication device mounting portion 13 are provided at different positions in an orthogonal direction (direction along the arrow RL in Figure 7) that is perpendicular to both the direction in which the flange 3 is received into the receiving openings 39 (not shown in Figure 7, direction along the arrow BF in Figure 2) and the vertical direction (direction along the arrow UD in Figure 2). As a result, even when the spring plates 21, 22 and the spring plate holder 37 need to be located on the side closer to the display unit 5 in the orthogonal direction, as shown in Figure 7, it is possible to achieve a state in which the display unit 5 and the communication device 8 do not overlap when viewed in the direction perpendicular to the surface of the gas meter 1 (the direction shown in Figure 7). Incidentally, in Figure 7, the communication device 8, the communication device mounting jig 10 for the main case, and the gas meter 1 are positioned in the order described, starting from the front of the page, in a direction perpendicular to the front of the gas meter 1. Furthermore, in the main unit case communication device mounting jig 10, with the flange 3 received into the receiving ports 39 of the spring plates 21 and 22 (not shown in Figure 7), the communication device mounting portion 13 may be provided on either one side of the spring plates 21 and 22 and the spring plate holding portion 37 (the side in the direction of arrow R) or the other side of the spring plates 21 and 22 and the spring plate holding portion 37 (the side in the direction of arrow L) in the direction along the front of the gas meter 1 (the direction along the arrows R and L in the orthogonal direction mentioned above). The amount of misalignment can be arbitrarily set by the shape of the elongated portion 45. Furthermore, it is preferable that the communication device mounting jig 10 for the main case is superimposed on the gas meter 1 when viewed in a direction perpendicular to the front of the gas meter 1.

[0046] Furthermore, with the communication device mounting jig 10 for the main case, the communication device 8 can be installed in a configuration where it is located above the spring plate holding portion 37 in the vertical direction, as shown in Figure 7, or it can be installed in a configuration where it is located below the spring plate holding portion 37 in the vertical direction, as shown in Figure 1.

[0047] (8) The communication device mounting jig 10 for the main body case according to this embodiment can be used to mount a communication device to a meter regardless of the type or size of the meter, and is well applicable to diaphragm gas meters and ultrasonic meters.

[0048] Furthermore, the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. Moreover, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the object of the present invention. [Industrial applicability]

[0049] This invention can be applied as a mounting jig for a communication device to a meter body, which is a supplier asset. [Explanation of symbols]

[0050] 1. Gas meter 2. Main unit case 3 flanges 8. Communication device 10. Communication device mounting jig for main unit case 13. Communication equipment mounting section 16 Communication device mounting holes 21. First spring plate (spring plate) 22. Second spring plate (spring plate) 30 1st plane part 31. Second Plane Section 32. Third plane section 33 pieces of beam-shaped extension 35 The starting point of the movement 36 department 37. Baneta Holder 38 interior space 39. Entrance

Claims

1. A communication device mounting jig for a gas meter, which has a flange protruding from the main body case, and is attached to the main body case, In a cross-sectional view along the vertical direction of the gas meter, including the clamping portion of the flange, A spring plate having two opposing first and second planar portions that can clamp the flange, and a third planar portion connecting the first and second planar portions, forming a U-shape, and having a receiving opening for receiving the flange at a position opposite the third planar portion, The spring plate holding portion, which is U-shaped in the cross-sectional view, is joined to the third planar portion of the spring plate and holds the spring plate, A communication device mounting jig for a main body case, having a communication device mounting section with a communication device mounting hole for mounting a communication device capable of transmitting information related to the gas flowing inside the gas meter.

2. In the aforementioned cross-sectional view, The communication device mounting jig for a main body case according to claim 1, wherein the spring plate is provided with a cantilevered extension that swings outward while biased toward the internal space formed between the first planar portion and the second planar portion, with a point provided on at least one of the first planar portion and the second planar portion as the pivoting starting point.

3. In the aforementioned cross-sectional view, The communication device mounting jig for a main body case according to claim 1 or 2, wherein the spring plate has an engaging portion at the receiving port that protrudes toward the side of the internal space formed between the first planar portion and the second planar portion and engages with the flange.

4. The spring plate comprises a first spring plate capable of clamping a first flange having a predetermined thickness in cross-section, and a second spring plate capable of clamping a second flange having a greater thickness in cross-section than the first flange. The communication device mounting jig for a main body case according to claim 1 or 2, wherein the spring plate holding portion is configured to hold both the first spring plate and the second spring plate.

5. In the mounting state in which the flange is received into the receiving port of the spring plate, The communication device mounting jig for a main body case according to claim 1 or 2, wherein the spring plate, the spring plate holding portion, and the communication device mounting portion are provided at different positions in orthogonal directions perpendicular to both the direction in which the flange is received into the receiving opening and the vertical direction.

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