JP2019158743A - Gas meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas meter capable of reducing assembling man-hours while preventing theft. SOLUTION: This is a gas meter 1 for measuring the flow rate of the gas by flowing the supplied gas into the inside, and forming a gas chamber 15 which is a closed space for measuring the flow rate of the inflowing gas. The 11 and the lid member 21, the resin front case 31 that covers the lid member 21 from the outside, the receiving portion 22 provided on the lid member 21, and the receiving portion 22 provided on the front case 31 and utilizing the elasticity of the material. It is provided with a holding portion 32 that is fitted into and hooked on the gas. [Selection diagram] Fig. 2

Description

  The present invention relates to a gas meter for measuring a gas flow rate.

  The gas meter allows the flow rate to be measured by flowing the supplied gas into the meter body. The meter body is often covered with a resin exterior member. Such a conventional gas meter is disclosed in Patent Document 1, for example.

Japanese Patent No. 6077781

  In the conventional gas meter, it is necessary to use screwing when attaching the exterior member to the meter body. However, when screwing is used in this way, the number of assembly steps increases. Further, when the exterior member is attached using screwing, the exterior component is easily removed and may be stolen.

  This invention solves the said subject, and aims at providing the gas meter which can reduce an assembly man-hour, aiming at theft prevention.

  A gas meter according to the present invention is a gas meter that measures the flow rate of a gas that is supplied by flowing the supplied gas into the inside, and forms a gas chamber that serves as a sealed space for measuring the flow rate of the gas that flows in. A member, a resin-made exterior member that covers the body member from the outside, a receiving portion that is provided on the body member, and a holding portion that is provided on the exterior member and is fitted into and caught by the receiving portion using the elasticity of the material. Is.

  According to this invention, it is possible to reduce assembly man-hours while preventing theft.

It is an external appearance perspective view of the gas meter concerning Embodiment 1 of this invention. It is II-II arrow sectional drawing of FIG. It is a front perspective view of a case body. It is the front perspective view which showed the state which fitted the cover member in the case main body. It is the front perspective view which showed the state which attached the board | substrate to the cover member. It is the front perspective view which showed the state which attached the front case. It is the front perspective view which showed the state which accommodated the battery in the front case. It is a back perspective view of a front case. It is the back perspective view showing the state where the seal member was attached to the front case. It is an enlarged view of the X section in FIG. FIG. 10A is a cross-sectional view illustrating a configuration when the upper side sealing structure between the case main body and the lid member is fitted to the front case. FIG. 10B is a cross-sectional view showing another configuration when the upper side seal structure between the case body and the lid member is fitted to the front case. It is an enlarged view of the XI part in FIG. FIG. 11A is a cross-sectional view showing a configuration when the lower-side seal structure between the case main body and the lid member is fitted to the front case. FIG. 11B is a cross-sectional view showing another configuration when the lower side sealing structure between the case main body and the lid member is fitted to the front case.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 FIG.
As shown in FIGS. 1 and 2, the gas meter 1 includes a case main body 11, a lid member 21, and a front case 31. The case main body 11, the lid member 21, and the front case 31 are arranged in order from the rear side to the front side of the gas meter 1.

  The case main body 11 and the lid member 21 constitute a main body member that partitions and forms a gas chamber 15 to be described later, and are made of metal. The front case 31 constitutes an exterior member that covers the front surface of the main body member, and is made of resin.

  As shown in FIGS. 1 to 3, the case main body 11 has a box shape with an open front, and has an opening 11 a and a flange 11 b. The opening part 11a is opened toward the front side. The flange portion 11 b constitutes a main body side flange portion, and is formed in the entire circumferential direction at the opening end portion of the case main body 11.

  As shown in FIGS. 1 and 3, the case body 11 includes a gas inflow pipe 12 and a gas outflow pipe 13. The gas inflow pipe 12 and the gas outflow pipe 13 have a cylindrical shape, penetrate the upper part of the case body 11, and protrude outward from the upper surface of the case body 11.

  The gas inflow pipe 12 allows gas supplied from a gas supply source to flow into a gas chamber 15 described later. The gas outflow pipe 13 causes the gas whose flow rate is measured in the gas chamber 15 to flow out toward a gas device such as a combustor. In addition, the arrow shown in FIG. 1 represents the flow of gas.

  As shown in FIGS. 2 and 4, the lid member 21 has a box shape with an open front surface, and is fitted in the case body 11 so as to close the opening 11 a of the case body 11. Further, a seal member 14 is interposed between the case main body 11 and the lid member 21, and this seal member 14 seals a gap between them. The seal member 14 constitutes a first seal member.

  Thus, the gas meter 1 has a hollow structure in which the case main body 11 and the lid member 21 are fitted together, and the sealed space serving as the internal space is a gas chamber 15 filled with the gas to be measured. The gas chamber 15 communicates with the gas inflow pipe 12 and the gas outflow pipe 13.

  The gas meter 1 includes a flow rate measuring means in the gas chamber 15. This flow rate measuring means measures the flow rate of the supplied gas in the process of sequentially passing through the gas inflow pipe 12, the gas chamber 15, and the gas outflow pipe 13. As shown in FIG. 5, the flow rate measuring means includes a substrate 40. The substrate 40 performs calculation processing of the gas flow rate, and displays the calculated gas flow rate on the liquid crystal screen 41 as a meter reading value of the gas meter 1.

  As shown in FIGS. 2, 4, and 5, the lid member 21 has an opening 21a, a case storage portion 21b, a flange portion 21c, or a folded portion 21d. The opening 21a opens toward the front side, and houses the substrate 40 therein. The case storage part 21b protrudes into the gas chamber 15 from the bottom part of the opening part 21a. The flange portion 21 c or the folded portion 21 d is formed in the entire circumferential direction at the opening end portion of the lid member 21. The flange portion 21c constitutes a lid side flange portion.

  Further, as shown in FIGS. 4 and 5, the lid member 21 includes a receiving portion 22. The receiving portion 22 is provided on the inner surface of the opening 21a, and has a structure in which a middle portion thereof is bent at a right angle toward the inside of the opening 21a.

  Here, the upper side seal structure between the case main body 11 and the lid member 21 will be described in detail with reference to FIGS. 10A and 10B.

  FIG. 10A shows a seal structure when the lid member 21 has a flange portion 21c. As shown in FIG. 10A, the flange portion 11 b and the flange portion 21 c are arranged so as to overlap in the fitting direction when the lid member 21 is fitted into the opening portion 11 a of the case main body 11. And the sealing member 14 is pinched | interposed between the flange part 11b and the flange part 21c, and has sealed the clearance gap between them.

  Furthermore, a clamp 23 having a rectangular frame shape is fitted into the overlapped portion where the flange portion 11b, the flange portion 21c, and the seal member 14 are overlapped. The clamp 23 has a groove shape in cross section, and is fitted into the overlapping portion so as to cover the overlapping portion from the distal end side to the proximal end side of the flange portions 11b and 21c. As a result, the clamp 23 is fitted to the flange portions 11b and 21c sandwiching the seal member 14 so as to be sandwiched from both sides in the thickness direction of the seal member 14, thereby improving the sealing performance by the seal member 14. Can do.

  In addition, when pinching the said superposition | polymerization part with the clasp 23, first, the clasp 23 in the state which made the cross-section L-shape is matched with the superposition | polymerization part. Next, the clamp 23 in a matched state is pressed so that its cross section becomes a groove shape. As a result, the clamp 23 sandwiches the overlapped portion.

  FIG. 10B shows a seal structure when the lid member 21 has a folded portion 21d. As shown in FIG. 10B, the flange portion 11 b and the folded portion 21 d are disposed so as to overlap in the fitting direction when the lid member 21 is fitted into the opening portion 11 a of the case body 11. And the sealing member 14 is pinched | interposed between the flange part 11b and the folding | returning part 21d, and has sealed the clearance gap between them.

  At this time, the folded portion 21d is folded so that the flange portion 11b and the seal member 14 are wound from the lid member 21 side toward the case main body 11 side, and the wound flange portion 11b and the seal member 14 are turned to the seal member. 14 is sandwiched from both sides in the thickness direction. Thereby, since the folding | returning part 21d can pinch | interpose the flange part 11b and the sealing member 14, the sealing performance by the sealing member 14 can be improved.

  When the flange portion 11b and the seal member 14 are wound by the folded portion 21d, the folded portion 21d having a L-shaped cross section is matched with the overlapped flange portion 11b and the seal member 14. Next, the clamp 23 in a matched state is pressed so that its cross section becomes a groove shape. As a result, the clamp 23 entrains the flange portion 11 b and the seal member 14.

  As shown in FIGS. 1, 2, and 6 to 9, the front case 31 includes a display window 31a, a battery storage portion 31b, a cover 31c, and a groove portion 31d.

  As shown in FIGS. 1 and 2, the display window 31 a is formed of a transparent member, and the meter reading value displayed on the liquid crystal screen 41 of the substrate 40 can be confirmed from the outside of the gas meter 1.

  As shown in FIGS. 2, 6, 8, and 9, the battery storage unit 31 b is a storage space for storing a plurality of batteries 34. The battery housing portion 31b opens to the front surface of the front case 31, and projects from the front surface to the rear side into the case housing portion 21b of the lid member 21. At this time, the protruding tip of the battery housing part 31 b enters the inside of the gas chamber 15.

  As shown in FIGS. 1 and 2, the cover 31c is detachably attached to the front surface of the front case 31 so as to cover the opening of the battery housing 31b. Further, the cover 31 c includes a seal member 35. The seal member 35 is provided on the back surface of the cover 31c, and seals a gap between the back surface of the cover 31c and the front surface of the front case 31. That is, the seal member 35 protects the battery 34 by preventing entry of foreign matter such as rainwater, dust, and dust into the battery housing 31b.

  As shown in FIGS. 2, 8, and 9, the groove 31 d is formed on the upper side of the front case 31. Further, the front case 31 includes a seal member 36. The seal member 36 is provided along the inner peripheral edge of the back surface of the front case 31 and is disposed in the groove 31d. The seal member 36 constitutes a second seal member.

  And in the groove part 31d, when the front case 31 is attached to the lid member 21, the upper side seal structure that becomes a superposed part in which the flange part 11b, the flange part 21c or the folded part 21d, and the seal member 14 are overlapped. Is fitted together with the seal member 36. Thereby, the sealing member 36 seals the gap between the back surface of the front case 31 and the outer surface of the overlapped portion. In other words, the seal member 36 protects the substrate 40 by preventing intrusion of foreign matters such as rainwater, dust, and dust into the substrate storage portion defined and formed between the lid member 21 and the front case 31. .

  Therefore, a fitting structure between the upper side seal structure and the groove 31d will be described in detail with reference to FIGS. 7A and 7B.

  As shown in FIG. 7A, the groove portion 31d is further fitted on the outer side of the flange portion 11b, the flange portion 21c, and the clamp 23 fitted on the outer side of the overlapped portion where the seal member 14 is overlaid. ing. At this time, the seal member 36 is sandwiched between the groove 31 d and the clamp 23.

  As shown in FIG. 7B, the groove 31d is further fitted on the outer side of the overlapped portion where the flange portion 11b, the folded portion 21d, and the seal member 14 are overlapped. Thereby, the groove part 31d can improve the sealing performance by the sealing member 14. At this time, the seal member 36 is sandwiched between the groove 31d and the folded portion 21d.

  Further, as shown in FIGS. 8 and 9, the front case 31 includes holding portions 32 and 33. The holding parts 32 and 33 are so-called snap fits, and are fitted and caught on the receiver side using the elasticity of the material.

  The holding portion 32 has a structure having a hook shape at the tip of the thin plate, and extends from the back surface of the front case 31 into the opening 21 a of the lid member 21. The receiving side of the holding portion 32 is the receiving portion 22 of the lid member 21 shown in FIGS. 4 and 5. That is, when the front case 31 is attached to the lid member 21, the holding portion 32 gets over the receiving portion 22 by elastic deformation, and is then fitted into and caught by the receiving portion 22.

  The holding portion 33 has a structure that protrudes from the lower side of the back surface of the front case 31 toward the inside of the front case 31. The holder side of the holding portion 33 is a clamp 23 or a folded portion 21d. That is, the holding part 33 is fitted and hooked into the flange 11b, the flange part 21c or the folded part 21d, and the lower side seal structure that is an overlapped part where the seal member 14 is overlapped.

  Specifically, as shown in FIGS. 11A and 11B, when the front case 31 is attached to the lid member 21, the holding portion 33 gets over the clasp 23 or the folded portion 21d by elastic deformation, and then the clasp 23 or the folded portion 21d is hooked.

  Therefore, when the gas flow rate is measured using the gas meter 1, first, the gas supplied from the gas supply source flows into the gas chamber 15 from the gas inflow pipe 12. Next, the gas that has flowed into the gas chamber 15 flows out of the gas outflow pipe 13 toward the gas device after the flow rate is measured by the flow rate measuring means. The gas flow rate measured by the flow rate measuring means is displayed on the liquid crystal screen 41 of the substrate 40 as a meter reading value, and is confirmed through the display window 31a of the front case 31.

  As described above, the gas meter 1 according to the first embodiment of the present invention is fitted into the overlapping portion where the holding portion 32 fitted into the receiving portion 22 and hooked, the case main body 11, the lid member 21, and the seal member 14 are overlapped. And a holding portion 33 to be caught. Thereby, the gas meter 1 can be attached to the main body member composed of the case main body 11 and the lid member 21 without using screwing, while being removed by a retaining action by catching. I can't. As a result, the gas meter 1 can reduce the number of assembling steps while preventing theft.

  In addition, the gas meter 1 according to Embodiment 1 includes a groove portion 31d in which the overlapped portion where the case main body 11, the lid member 21, and the seal member 14 are overlapped, and the seal member 36 are fitted to the front case 31. Yes. Thereby, since the sealing member 36 is inserted | pinched between the superposition | polymerization part and the groove part 31d, the gas meter 1 can improve the waterproofness with respect to the board | substrate 40. FIG.

  In the present invention, within the scope of the invention, a free combination of each embodiment, a modification of an arbitrary component in each embodiment, or an omission of an arbitrary component in each embodiment is possible. Is possible.

DESCRIPTION OF SYMBOLS 1 Gas meter 11 Case main body 11a Opening part 11b Flange part 12 Gas inflow pipe 13 Gas outflow pipe 14 Seal member 15 Gas chamber 21 Lid member 21a Opening part 21b Case accommodating part 21c Flange part 21d Folding part 22 Receiving part 23 Clamp 31 Front case 31a Display window 31b Battery storage part 31c Cover 31d Groove part 32 Holding part 33 Holding part 34 Battery 35 Seal member 36 Seal member 40 Substrate 41 Liquid crystal screen

Claims (3)

A gas meter for flowing a supplied gas into the interior and measuring the flow rate of the gas,
A main body member that forms a gas chamber serving as a sealed space for measuring the flow rate of the gas flowing in;
A resin exterior member covering the main body member from the outside;
A receiving portion provided on the body member;
A gas meter, comprising: a holding portion that is provided on the exterior member and is fitted into and caught by the receiving portion using elasticity of a material. The body member is
A case body into which the supplied gas flows, and
A lid member that forms the gas chamber between the case main body and
A first seal member provided between the case body and the lid member;
The receiving portion is a superposed portion in which the case main body, the lid member, and the first seal member are overlapped,
The gas meter according to claim 1, wherein the holding portion is fitted and caught with respect to the overlapping portion. A second seal member provided between the exterior member and the overlapping portion;
The exterior member is
The gas meter according to claim 2, further comprising a groove portion into which the overlapping portion and the second seal member are fitted.

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