gas meter

Abstract

To provide a gas meter that makes it hard to put a foot on a return shaft protective cap and can prevent an operation-side end part of a gas meter return shaft from being broken.SOLUTION: A gas meter 1 has a base part 32 where a return shaft protective cap 30 has a fitted part to be fitted to a return shaft box 5 formed at one end, a display view part 33 which is formed at the other end of the base part 32 to an operation display part 4a to be viewed, and a plurality of ribs 34 raised from an outer peripheral surface of the base part 32 in parallel with a virtual center axis X of the base part 32, wherein the ribs 34 are made low on the side of the display view part 33 and high on the side of the fitted part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a gas meter having a return shaft protection cap that covers the operating side end of the gas meter return shaft.

Background Art

[0002] A gas meter is provided with a gas meter return device, and the gas meter return shaft protrudes from the gas meter body (for example, Patent Document 1). A return shaft protection cap is provided on the gas meter return shaft.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When installing the gas meter, construction workers may trip over the gas meter return shaft protruding from the gas meter body.

[0005] Therefore, an object of the present invention is to provide a gas meter that is difficult to step on with the return shaft protection cap and can prevent damage to the operating side end of the gas meter return shaft.

Means for Solving the Problems

[0006] The gas meter 1 of the present invention as described in claim 1 comprises a gas meter body 10 having a gas flow rate measuring unit and a gas flow path shutoff mechanism inside, a gas meter return shaft 4 that returns a shutoff valve that shuts off the gas flow path from a valve closed state to a valve open state, a return shaft box 5 attached to the gas meter body 10 and movably holding the gas meter return shaft 4, and a return shaft protective cap 30 that covers the operating end of the gas meter return shaft 4 protruding from the gas meter body 10, wherein the return shaft protective cap 30 is attached to the return shaft box 5 A gas meter 1 in which the operation indicator section 4a at the operating end can be seen when mounted on the gas meter 5, wherein the return shaft protection cap 30 has a base portion 32 with a mounting portion 31 at one end for attachment to the return shaft box 5, a display viewing portion 33 formed at the other end of the base portion 32 for seeing the operation indicator section 4a, and a plurality of ribs 34 rising from the outer circumferential surface of the base portion 32 parallel to the virtual central axis X of the base portion 32, wherein the ribs 34 are lower on the side of the display viewing portion 33 and higher on the side of the mounting portion 31. The present invention as described in claim 2 is characterized in that, in the gas meter 1 described in claim 1, it has a front cover 20 that covers a control board which is wired and connected to the gas flow rate measuring unit and the gas flow path shutoff mechanism, the front cover 20 is attached to the gas meter body 10, and the top surface 22 of the front cover 20 is an inclined surface which is higher on the gas meter body 10 side. The present invention as described in claim 3 is characterized in that, in the gas meter 1 described in claim 1, the base portion 32 has a first base portion 32a located on the mounting portion 31 side and a second base portion 32b located on the display viewing portion 33 side, and the outer diameter of the second base portion 32b is smaller than the outer diameter of the first base portion 32a. The present invention as described in claim 4 is characterized in that, in the gas meter 1 described in claim 1, the base portion 32 has a first base portion 32a located on the mounting portion 31 side and a second base portion 32b located on the display viewing portion 33 side, and the outer diameter of the second base portion 32b is made smaller from the first base portion 32a side toward the display viewing portion 33 side to form an inclined surface. The present invention as described in claim 5 is characterized in that, in the gas meter 1 described in claim 3 or claim 4, the rib 34 has a first rib 34a located on the first base portion 32a and a second rib 34b located on the second base portion 32b, the first rib 34a is of the same height, and the second rib 34b is lower on the side of the display viewing portion 33. The present invention as described in claim 6 is a gas meter 1 according to any one of claims 1 to 4, characterized in that, in the gas meter 1 according to claim 1, the number of ribs 34 is set to any number from 2 to 8, and a finger can be inserted between the ribs 34. [Effects of the Invention]

[0007] According to the present invention, by raising multiple ribs from the outer surface of the base portion parallel to the virtual central axis of the base portion, with the display viewing portion side lower and the mounting portion side higher, it is possible to make it difficult to place a foot on the return shaft protective cap and prevent damage to the operating end of the gas meter return shaft. [Brief explanation of the drawing]

[0008] [Figure 1] External perspective view of a gas meter according to one embodiment of the present invention [Figure 2] Side view of the gas meter [Figure 3] Front view of the gas meter [Figure 4] A perspective view showing the return shaft box and return shaft protective cap attached to the gas meter according to this embodiment. [Figure 5] Diagram showing the return shaft protection cap of the gas meter according to this embodiment. [Figure 6] A diagram showing a return shaft protection cap for a gas meter according to another embodiment of the present invention. [Figure 7] A diagram showing a gas meter return shaft protection cap according to yet another embodiment of the present invention. [Figure 8] A diagram showing a gas meter return shaft protection cap according to yet another embodiment of the present invention. [Figure 9] A diagram showing a gas meter return shaft protection cap according to yet another embodiment of the present invention. [Modes for carrying out the invention]

[0009] The gas meter according to the first embodiment of the present invention has a return shaft protection cap that includes a base portion with a mounting portion at one end for attachment to the return shaft box, a display viewing portion formed at the other end of the base portion for viewing the operation display portion, and a plurality of ribs rising from the outer circumferential surface of the base portion parallel to the virtual central axis of the base portion, wherein the ribs are lower on the display viewing portion side and higher on the mounting portion side. According to this embodiment, by raising multiple ribs from the outer circumferential surface of the base portion parallel to the virtual central axis of the base portion, with the display viewing portion side lower and the mounting portion side higher, it is possible to make it difficult to place a foot on the return shaft protective cap and prevent damage to the operating end of the gas meter return shaft.

[0010] A second embodiment of the present invention is a gas meter according to the first embodiment, which has a front cover that covers a control board that is wired and connected to a gas flow measurement unit and a gas flow path shutoff mechanism, the front cover is attached to the gas meter body, and the top surface of the front cover is a sloped surface that is higher on the gas meter body side. According to this embodiment, damage to the gas meter can be prevented by making it difficult to place feet on both the return shaft protection cap and the front cover.

[0011] A third embodiment of the present invention is a gas meter according to the first embodiment, wherein the base portion has a first base portion located on the mounting portion side and a second base portion located on the display viewing portion side, and the outer diameter of the second base portion is smaller than the outer diameter of the first base portion. According to this embodiment, by making the outer diameter of the second base portion smaller than the outer diameter of the first base portion, it becomes more difficult to place a foot on the return shaft protective cap, and damage to the operating end of the gas meter return shaft can be prevented.

[0012] In the fourth embodiment of the present invention, in the gas meter according to the first embodiment, the base portion has a first base portion located on the mounting portion side and a second base portion located on the display and visual recognition portion side, and the outer diameter of the second base portion is made smaller from the first base portion side toward the display and visual recognition portion side to form an inclined surface. According to this embodiment, by making the outer diameter of the second base portion an inclined surface, it is difficult to step on the return shaft protection cap, and damage to the operating side end portion of the gas meter return shaft can be prevented.

[0013] In the fifth embodiment of the present invention, in the gas meter according to the third or fourth embodiment, the rib has a first rib located on the first base portion and a second rib located on the second base portion, the first rib has the same height, and the second rib is lower on the display and visual recognition portion side. According to this embodiment, the first rib enhances the detachability of the return shaft protection cap, and the second rib makes it difficult to step on the return shaft protection cap, and damage to the operating side end portion of the gas meter return shaft can be prevented.

[0014] In the sixth embodiment of the present invention, in the gas meter according to any one of the first to fourth embodiments, the rib is any one from two to eight, and a finger can be inserted between the ribs. According to this embodiment, the detachability of the return shaft protection cap can be enhanced.

Example

[0015] Hereinafter, a gas meter according to an embodiment of the present invention will be described. FIG. 1 is an external perspective view of the gas meter according to this embodiment, FIG. 2 is a side view of the gas meter, and FIG. 3 is a front view of the gas meter.

[0016] The gas meter 1 has a gas flow rate measuring unit and a gas flow path shut-off mechanism inside, and the gas meter body 10 has a gas inlet 2 and a gas outlet 3. A shut-off valve (not shown) is provided in the gas flow path (not shown) from the gas inlet 2 to the gas outlet 3. The shut-off valve shuts off the gas flow path formed inside the gas meter body 10. The gas meter 1 is equipped with a gas meter return shaft 4 that returns the shut-off valve from a closed state to an open state.

[0017] The gas meter body 10 is made of iron, and the front of the gas meter body 10 has an opening 11 for a reset button to which the gas meter reset shaft 4 is attached, and an opening 12 for a control board which is covered by the front cover 20. A reset shaft box 5 is attached to the reset button opening 11. The reset shaft box 5 is attached to the gas meter body 10 and holds the gas meter reset shaft 4 in a movable manner. The return shaft protection cap 30 covers the operating end of the gas meter return shaft 4 that protrudes from the gas meter body 10. A control board (not shown) is placed in the opening 12 for the control board, and is wired and connected to the gas flow measurement unit and the gas flow path shutoff mechanism. The control board is covered by a front cover 20. The front cover 20 is attached to the gas meter body 10. The control board has a display unit 23, and the front cover 20 is provided with a visible section 21 that makes the display unit 23 visible. The top surface 22 of the front cover 20 is sloped so that the gas meter body 10 side is higher. By making the top surface 22 of the front cover 20 sloped, it is made difficult to step on the front cover 20, thereby preventing damage to the gas meter 1.

[0018] Figure 4 is a perspective view showing the return shaft box and return shaft protection cap attached to the gas meter according to this embodiment. Figure 4(a) shows the return shaft protection cap removed from the return shaft box, and Figure 4(b) shows the return shaft protection cap attached to the return shaft box.

[0019] The return shaft protection cap 30 has a mounting portion 31 for attachment to the return shaft box 5, and the return shaft box 5 has a locking portion 5a corresponding to the mounting portion 31. For example, the locking portion 5a is formed with an external thread, and the mounting portion 31 is formed with an internal thread. The return shaft protection cap 30 and the return shaft box 5 are connected by a fall prevention device 6. The anti-detachment device 6 is made of a flexible material, and has a cap ring portion 6a at one end and a box ring portion 6b at the other end.

[0020] Figure 5 shows the return shaft protection cap of the gas meter according to this embodiment. Figure 5(a) is a side view showing the cap attached to the return shaft box, Figure 5(b) is a cross-sectional view of the return shaft protection cap, and Figure 5(c) is an external perspective view of the return shaft protection cap.

[0021] As shown in Figure 5(a), the return shaft box 5 movably holds the gas meter return shaft 4, and an operation indicator unit 4a is provided at the operating end of the gas meter return shaft 4. The operation indicator unit 4a displays the open / closed state of the shut-off valve as the gas meter return shaft 4 moves (see, for example, Japanese Utility Model Publication No. 6-3248). With the return shaft protection cap 30 attached to the return shaft box 5, the operation indicator section 4a at the operating end can be seen.

[0022] As shown in Figures 5(b) and 5(c), the return shaft protection cap 30 has a base portion 32 with a mounting portion 31 for attachment to the return shaft box 5 at one end, a display viewing portion 33 formed at the other end of the base portion 32 that allows the operation display portion 4a to be viewed, and a plurality of ribs 34 that rise from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32. The return shaft protection cap 30 is made of resin material, and at least the display visibility portion 33 is visible. The rib 34 is lower on the side of the display / visibility section 33 and higher on the side of the mounting section 31. The base portion 32 has a first base portion 32a located on the mounting portion 31 side and a second base portion 32b located on the display viewing portion 33 side, with the outer diameter of the second base portion 32b being smaller than the outer diameter of the first base portion 32a. The rib 34 has a first rib 34a located on the first base portion 32a and a second rib 34b located on the second base portion 32b. The first rib 34a is at the same height as the first rib 34a, while the second rib 34b has the mounting portion 31 side at the same height as the first rib 34a and the display viewing portion 33 side is lowered to be the same as the outer diameter of the second base portion 32b. In this embodiment, there are six ribs 34, and fingers can be inserted between the ribs 34.

[0023] According to this embodiment, by raising the multiple ribs 34 that extend from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32, with the display viewing portion 33 side lower and the mounting portion 31 side higher, it is difficult to place a foot on the return shaft protection cap 30, and damage to the operating end of the gas meter return shaft 4 can be prevented. Furthermore, according to this embodiment, by making the outer diameter of the second base portion 32b smaller than the outer diameter of the first base portion 32a, it becomes more difficult to place a foot on the return shaft protection cap 30, thereby preventing damage to the operating end of the gas meter return shaft 4. Furthermore, according to this embodiment, the first rib 34a improves the ease of attaching and detaching the return shaft protection cap 30, and the second rib 34b makes it difficult to place a foot on the return shaft protection cap 30, thereby preventing damage to the operating end of the gas meter return shaft 4. Furthermore, according to this embodiment, the return shaft protection cap 30 can be attached and detached more easily because it is equipped with six ribs 34, and fingers can be inserted between the ribs 34.

[0024] Figure 6 shows a return shaft protection cap for a gas meter according to another embodiment of the present invention, where Figure 6(a) is a side view showing the cap attached to the return shaft box, Figure 6(b) is a cross-sectional view of the return shaft protection cap, and Figure 6(c) is an external perspective view of the return shaft protection cap.

[0025] As shown in Figure 6(a), the return shaft box 5 movably holds the gas meter return shaft 4, and an operation indicator unit 4a is provided at the operating end of the gas meter return shaft 4. The operation indicator unit 4a displays the open / closed state of the shut-off valve as the gas meter return shaft 4 moves (see, for example, Japanese Utility Model Publication No. 6-3248). With the return shaft protection cap 30 attached to the return shaft box 5, the operation indicator section 4a at the operating end can be seen.

[0026] As shown in Figures 6(b) and 6(c), the return shaft protection cap 30 has a base portion 32 with a mounting portion 31 for attachment to the return shaft box 5 at one end, a display / visibility portion 33 formed at the other end of the base portion 32 that allows the operation indicator portion 4a to be seen, and a plurality of ribs 34 rising from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32. The return shaft protection cap 30 is made of resin material, and at least the display visibility portion 33 is visible. The rib 34 is lower on the side of the display / visibility section 33 and higher on the side of the mounting section 31. The base portion 32 is formed with an outer diameter that is the same as or slightly larger than that of the display / visibility portion 33. The rib 34 has a first rib 34a located on the mounting portion 31 side and a second rib 34b located on the display viewing portion 33 side. The first rib 34a is at the same height, while the second rib 34b has the same height as the first rib 34a on the mounting portion 31 side and is lower on the display viewing portion 33 side so that it is the same as the outer diameter of the base portion 32. In this embodiment, there are six ribs 34, and fingers can be inserted between the ribs 34.

[0027] According to this embodiment, by raising the multiple ribs 34 that extend from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32, with the display viewing portion 33 side lower and the mounting portion 31 side higher, it is difficult to place a foot on the return shaft protection cap 30, and damage to the operating end of the gas meter return shaft 4 can be prevented. Furthermore, according to this embodiment, the first rib 34a improves the ease of attaching and detaching the return shaft protection cap 30, and the second rib 34b makes it difficult to place a foot on the return shaft protection cap 30, thereby preventing damage to the operating end of the gas meter return shaft 4. Furthermore, according to this embodiment, the return shaft protection cap 30 can be attached and detached more easily because it is equipped with six ribs 34, and fingers can be inserted between the ribs 34.

[0028] Figure 7 shows a return shaft protection cap for a gas meter according to yet another embodiment of the present invention, where Figure 7(a) is a side view showing the cap attached to the return shaft box, Figure 7(b) is a cross-sectional view of the return shaft protection cap, and Figure 7(c) is an external perspective view of the return shaft protection cap.

[0029] As shown in Figure 7(a), the return shaft box 5 movably holds the gas meter return shaft 4, and an operation indicator unit 4a is provided at the operating end of the gas meter return shaft 4. The operation indicator unit 4a displays the open / closed state of the shut-off valve as the gas meter return shaft 4 moves (see, for example, Japanese Utility Model Publication No. 6-3248). With the return shaft protection cap 30 attached to the return shaft box 5, the operation indicator section 4a at the operating end can be seen.

[0030] As shown in Figures 7(b) and 7(c), the return shaft protection cap 30 has a base portion 32 with a mounting portion 31 for attachment to the return shaft box 5 at one end, a display / visibility portion 33 formed at the other end of the base portion 32 that allows the operation indicator portion 4a to be seen, and a plurality of ribs 34 that rise from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32. The return shaft protection cap 30 is made of resin material, and at least the display visibility portion 33 is visible. The rib 34 is lower on the side of the display / visibility section 33 and higher on the side of the mounting section 31. The base portion 32 has a first base portion 32a located on the mounting portion 31 side and a second base portion 32b located on the display viewing portion 33 side, and the outer diameter of the second base portion 32b is made smaller from the first base portion 32a side toward the display viewing portion 33 side to form an inclined surface. The rib 34 has a first rib 34a located on the first base portion 32a and a second rib 34b located on the second base portion 32b. The first rib 34a is at the same height as the first rib 34a, while the second rib 34b has the mounting portion 31 side at the same height as the first rib 34a and the display viewing portion 33 side is lowered to be the same as the outer diameter of the second base portion 32b. In this embodiment, four ribs 34 are provided, and fingers can be inserted between the ribs 34.

[0031] According to this embodiment, by raising the multiple ribs 34 that extend from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32, with the display viewing portion 33 side lower and the mounting portion 31 side higher, it is difficult to place a foot on the return shaft protection cap 30, and damage to the operating end of the gas meter return shaft 4 can be prevented. Furthermore, according to this embodiment, by making the outer diameter of the second base portion 32b an inclined surface, it becomes difficult to place a foot on the return shaft protection cap 30, and damage to the operating end of the gas meter return shaft 4 can be prevented. Furthermore, according to this embodiment, the first rib 34a improves the ease of attaching and detaching the return shaft protection cap 30, and the second rib 34b makes it difficult to place a foot on the return shaft protection cap 30, thereby preventing damage to the operating end of the gas meter return shaft 4. Furthermore, according to this embodiment, the return shaft protection cap 30 can be attached and detached more easily because it is equipped with six ribs 34, and fingers can be inserted between the ribs 34.

[0032] Figure 8 shows a return shaft protection cap for a gas meter according to yet another embodiment of the present invention, where Figure 8(a) is a side view showing the cap attached to the return shaft box, Figure 8(b) is a cross-sectional view of the return shaft protection cap, and Figure 8(c) is an external perspective view of the return shaft protection cap.

[0033] As shown in Figure 8(a), the return shaft box 5 movably holds the gas meter return shaft 4, and an operation indicator unit 4a is provided at the operating end of the gas meter return shaft 4. The operation indicator unit 4a displays the open / closed state of the shut-off valve as the gas meter return shaft 4 moves (see, for example, Japanese Utility Model Publication No. 6-3248). With the return shaft protection cap 30 attached to the return shaft box 5, the operation indicator section 4a at the operating end can be seen.

[0034] As shown in Figures 8(b) and 8(c), the return shaft protection cap 30 has a base portion 32 with a mounting portion 31 for attachment to the return shaft box 5 at one end, a display / visibility portion 33 formed at the other end of the base portion 32 that allows the operation indicator portion 4a to be seen, and a plurality of ribs 34 that rise from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32. The return shaft protection cap 30 is made of resin material, and at least the display visibility portion 33 is visible. The rib 34 is lower on the side of the display / visibility section 33 and higher on the side of the mounting section 31. The base portion 32 has a first base portion 32a located on the mounting portion 31 side and a second base portion 32b located on the display viewing portion 33 side, and the outer diameter of the second base portion 32b is made smaller from the first base portion 32a side toward the display viewing portion 33 side to form an inclined surface. The rib 34 has a first rib 34a located on the first base portion 32a and a second rib 34b located on the second base portion 32b. The first rib 34a is at the same height as the first rib 34a, while the second rib 34b has the mounting portion 31 side at the same height as the first rib 34a and the display viewing portion 33 side is lowered to be the same as the outer diameter of the second base portion 32b. In this embodiment, a number of ribs 34 are provided.

[0035] According to this embodiment, by raising the multiple ribs 34 that extend from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32, with the display viewing portion 33 side lower and the mounting portion 31 side higher, it is difficult to place a foot on the return shaft protection cap 30, and damage to the operating end of the gas meter return shaft 4 can be prevented. Furthermore, according to this embodiment, by making the outer diameter of the second base portion 32b an inclined surface, it becomes difficult to place a foot on the return shaft protection cap 30, and damage to the operating end of the gas meter return shaft 4 can be prevented. Furthermore, according to this embodiment, the first rib 34a improves the ease of attaching and detaching the return shaft protection cap 30, and the second rib 34b makes it difficult to place a foot on the return shaft protection cap 30, thereby preventing damage to the operating end of the gas meter return shaft 4.

[0036] Figure 9 shows a return shaft protection cap for a gas meter according to yet another embodiment of the present invention, where Figure 9(a) is a side view showing the cap attached to the return shaft box, Figure 9(b) is a cross-sectional view of the return shaft protection cap, and Figure 9(c) is an external perspective view of the return shaft protection cap.

[0037] As shown in Figure 9(a), the return shaft box 5 movably holds the gas meter return shaft 4, and an operation indicator unit 4a is provided at the operating end of the gas meter return shaft 4. The operation indicator unit 4a displays the open / closed state of the shut-off valve as the gas meter return shaft 4 moves (see, for example, Japanese Utility Model Publication No. 6-3248). With the return shaft protection cap 30 attached to the return shaft box 5, the operation indicator section 4a at the operating end can be seen.

[0038] As shown in Figures 9(b) and 9(c), the return shaft protection cap 30 has a base portion 32 with a mounting portion 31 for attachment to the return shaft box 5 at one end, a display / visibility portion 33 formed at the other end of the base portion 32 for viewing the operation indicator portion 4a, and a plurality of ribs 34 rising from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32. The return shaft protection cap 30 is made of resin material, and at least the display visibility portion 33 is visible. The rib 34 is lower on the side of the display / visibility section 33 and higher on the side of the mounting section 31. The base portion 32 has a first base portion 32a located on the mounting portion 31 side and a second base portion 32b located on the display viewing portion 33 side, with the outer diameter of the second base portion 32b being smaller than the outer diameter of the first base portion 32a. The rib 34 has a first rib 34a located on the first base portion 32a and a second rib 34b located on the second base portion 32b. The first rib 34a is at the same height as the first rib 34a, while the second rib 34b has the mounting portion 31 side at the same height as the first rib 34a and the display viewing portion 33 side is lowered to be the same as the outer diameter of the second base portion 32b. In this embodiment, eight ribs 34 are provided, and fingers can be inserted between the ribs 34.

[0039] According to this embodiment, by raising the multiple ribs 34 that extend from the outer circumferential surface of the base portion 32 parallel to the virtual central axis 32X of the base portion 32, with the display viewing portion 33 side lower and the mounting portion 31 side higher, it is difficult to place a foot on the return shaft protection cap 30, and damage to the operating end of the gas meter return shaft 4 can be prevented. Furthermore, according to this embodiment, by making the outer diameter of the second base portion 32b smaller than the outer diameter of the first base portion 32a, it becomes more difficult to place a foot on the return shaft protection cap 30, thereby preventing damage to the operating end of the gas meter return shaft 4. Furthermore, according to this embodiment, the first rib 34a improves the ease of attaching and detaching the return shaft protection cap 30, and the second rib 34b makes it difficult to place a foot on the return shaft protection cap 30, thereby preventing damage to the operating end of the gas meter return shaft 4. Furthermore, according to this embodiment, since it is equipped with eight ribs 34 and fingers can be inserted between the ribs 34, the ease of attaching and detaching the return shaft protection cap 30 can be improved. In this embodiment, four, six, and eight ribs 34 are shown, but if the return shaft protection cap 30 is of a typical size, it is possible to insert a finger between two or more ribs and eight or fewer ribs 34, which improves the ease of attaching and detaching the return shaft protection cap 30 compared to ribs that are merely for anti-slip purposes. [Industrial applicability]

[0040] This invention is particularly suitable for commercial ultrasonic gas meters. [Explanation of Symbols]

[0041] 1. Gas meter 2 Gas inlet 3. Gas outlet 4. Gas meter reset shaft 4a Operation display section 5. Return shaft box 5a Locking part 6 Fall prevention device 6a Ring part for cap 6b Ring section for box 10. Gas meter unit 11. Opening for the reset button 12. Aperture for control board 20 Front cover 21 Visible part 22 Top surface 23 Display section 30. Return shaft protection cap 31 Mounting part 32 Base 32a 1st base part 32b 2nd base part 32X Virtual Central Axis 33 Display Visibility Section 34 Ribs 34a First Rib 34b Second Rib

Claims

1. A gas meter body having a gas flow measurement unit and a gas flow path shutoff mechanism inside, A gas meter return shaft that returns a shut-off valve that blocks the gas flow path from a closed state to an open state, A return shaft box attached to the gas meter body and movably holding the gas meter return shaft, A return shaft protective cap covers the operating end of the gas meter return shaft protruding from the gas meter body, and It has, A gas meter in which the operation indicator at the operating end can be viewed with the return shaft protection cap attached to the return shaft box, The aforementioned return shaft protection cap, A base portion having a mounting portion at one end for attachment to the return shaft box, A display viewing section is formed at the other end of the base portion, allowing the operation display section to be viewed, Multiple ribs are raised from the outer surface of the base portion parallel to the virtual central axis of the base portion. It has, The rib is made lower on the side of the display / visibility area and higher on the side of the mounting area. A gas meter characterized by the following features.

2. It has a front cover that covers the control board which is wired and connected to the gas flow measurement unit and the gas flow path shutoff mechanism, The front cover is attached to the gas meter body. The top surface of the front cover is designed to be a sloped surface with the gas meter body side being higher. The gas meter according to feature 1.

3. The base portion is, The first base portion located on the mounting portion side, The second base portion located on the side of the display viewing section and It has, The outer diameter of the second base portion is made smaller than the outer diameter of the first base portion. The gas meter according to feature 1.

4. The base portion is, The first base portion located on the mounting portion side, The second base portion located on the side of the display viewing section and It has, The outer diameter of the second base portion is made smaller from the first base portion side toward the display viewing portion side to form an inclined surface. The gas meter according to feature 1.

5. The aforementioned rib, The first rib located on the first base portion, The second rib located on the second base portion and It has, The first ribs are set to the same height. The second rib is lower on the side of the display viewing area. The gas meter according to claim 3 or 4.

6. The aforementioned ribs may be numbered from two to eight. (The aforementioned rib). A finger can fit inside. A gas meter according to any one of claims 1 to 4.

Images