JP-7854648-B2 - gas meter

Inventors

• 佐藤 真一
• 各務 亮
• 浅野 博昭
• 能登 雅弘
• 飯田 雄太
• 佐藤 薫
• 中村 政則
• 森井 良浩
• 中田 圭祐
• 金澤 一弘
• 齋藤 孝憲
• 浅田 昭治
• 村中 一郎
• 西口 一弘
• 松井 彰
• 石橋 卓也
• 酒向 正義

Assignees

• 東京瓦斯株式会社
• 大阪瓦斯株式会社
• 東邦瓦斯株式会社
• 愛知時計電機株式会社
• 株式会社竹中製作所
• パナソニック株式会社

Dates

Publication Date

20260507

Application Date

20220531

Claims (7)

1. A gas meter body made of iron material, having a gas flow measurement unit and a gas flow path shutoff mechanism inside, A control board that is wired and connected to the gas flow measurement unit and the gas flow path shutoff mechanism, A gas meter having a front cover attached to the gas meter body and covering the control board, The control board includes a display unit, a terminal unit connected to external wiring, and a shut-off button unit for manually shutting off the gas flow path. The aforementioned front cover is A front cover body that covers the control board except for the terminal portion and the shut-off button portion, A terminal cover portion that covers the terminal portion and is screwed to the front cover body, It has a shut-off button cover portion that covers the shut-off button portion and is attached to the front cover body so as to be openable and closable, The terminal cover portion can be attached to and detached from the front cover body by attaching and detaching the terminal cover screws. The gas meter is characterized in that the shut-off button cover can be opened and closed relative to the front cover body by removing the screw for the shut-off button, and cannot be opened and closed relative to the front cover body by installing the screw for the shut-off button.
2. The control board includes: The terminal section is located below the display section. The terminal portion is located on one of the aforementioned shut-off button portions. The front cover body includes, A first screw hole for attaching the terminal cover screw is provided on one of the terminal portions. A second screw hole for attaching the terminal cover screw is provided on the other side of the terminal portion, below the cutoff button portion. A third screw hole for attaching the screw for the shut-off button is provided on the other side of the shut-off button portion. A mounting base for the shut-off button is positioned to the side of the third screw hole. The terminal cover portion includes: It has a fourth screw hole corresponding to the first screw hole and a fifth screw hole corresponding to the second screw hole, The aforementioned shut-off button cover portion includes: A sixth screw hole corresponding to the third screw hole, A hinge part that rotates on the shaft, It has a mounting portion for the shut-off button to which the hinge portion is attached, The gas meter according to claim 1, characterized in that the shut-off button mounting part is attached to the shut-off button mounting base.
3. The mounting base for the shut-off button has a seventh screw hole. The aforementioned cut-off button mounting portion has an eighth screw hole, The gas meter according to claim 2, characterized in that the shut-off button mounting portion is attached to the shut-off button mounting base by attaching fastening screws to the seventh screw hole and the eighth screw hole.
4. The mounting base for the shut-off button has a positioning hole, The gas meter according to claim 3, characterized in that the projection formed on the shut-off button mounting portion is fitted into the positioning hole.
5. The front cover body includes, Ribs are formed to stand above and to the side of the terminal portion. On the back of the terminal cover portion, The gas meter according to claim 1, characterized in that a sponge packing is provided at a position in contact with the rib.
6. Grooves are formed on the upper and outer surfaces of the ribs. The gas meter according to claim 5, characterized in that a wiring opening is formed on the lower surface of the terminal cover portion.
7. The gas meter according to claim 2, characterized in that the shaft portion is made of metal and the front cover other than the shaft portion is made of resin.

Description

This invention relates to a gas meter having a gas flow measurement unit and a gas flow path shutoff mechanism inside. A large diaphragm-type microcomputer meter, installed and used in factories and other facilities, and equipped with a shut-off valve to block gas flow, consists of a controller case unit equipped with a control board that controls safety functions and communicates with the outside, a main unit that performs measurement by driving a diaphragm, and a display unit that displays the indicated value using a mechanical counter (for example, Patent Document 1). The controller case has a cover that houses the terminal wires for communication with the outside world. When installing a gas meter, it is necessary to connect it to other equipment, so the contractor opens the cover and performs the wiring work. The controller case is equipped with a manual shut-off switch, and a switch cover is fitted to protect the switch. In emergencies or when gas use needs to be stopped for an extended period, the user can operate the manual shut-off switch to close the shut-off valve inside the gas meter, preventing dangers such as gas leaks. For the protection of the switch and to prevent tampering, the switch cover is normally secured with screws and cannot be opened or closed. To operate the switch, the screws must be removed and the switch cover opened, allowing the manual shut-off switch to be pressed. In order to make such large membrane-type microcomputer gas meters lighter and more compact, if an ultrasonic type is adopted, the measurement principle becomes electronic, making the use of a mechanical counter undesirable. Therefore, a method is used in which a liquid crystal display unit is provided on the control board to display the pointer value (for example, Patent Document 2). When a liquid crystal display is installed on the control board, it is necessary to place the control board on the front of the gas meter to ensure visibility. Furthermore, to avoid increasing the component mounting surface on the control board, it is desirable to place the components mounted on the control board on the same side as the liquid crystal display. Design Registration No. 1088204 GazetteDesign Registration No. 1537126 Gazette External perspective view of a gas meter according to one embodiment of the present inventionFront view of the gas meter with the front cover removed.External perspective view showing the front cover of the gas meter according to this embodiment.A perspective view of the main part showing the front cover of the gas meter according to this embodiment.Diagram showing the terminal cover portion of the gas meter according to this embodiment.This diagram shows the front cover with the terminal cover and the cutoff button cover attached and the cutoff button cover closed.This diagram shows the front cover with the terminal cover and the cutoff button cover attached, and with the cutoff button cover in the open position.This diagram shows the front cover with the terminal cover removed, the shut-off button cover attached, and the shut-off button cover in the open position. The gas meter according to the first embodiment of the present invention includes a control board comprising a display unit, a terminal unit connected to external wiring, and a shut-off button unit for manually shutting off the gas flow path. The front cover comprises a front cover body that covers the control board except for the terminal unit and the shut-off button unit, a terminal cover unit that covers the terminal unit and is screwed to the front cover body, and a shut-off button cover unit that covers the shut-off button unit and is attached to the front cover body in an openable and closable manner. The terminal cover unit can be attached to and detached from the front cover body by attaching and detaching terminal cover screws, and the shut-off button cover unit can be opened and closed from the front cover body by removing the shut-off button screws, and cannot be opened and closed from the front cover body by attaching the shut-off button screws. According to this embodiment, when a contractor installing a gas meter connects wiring for another device to the terminal, they can remove only the terminal cover without opening the shut-off button cover. When a consumer operates the shut-off button, they can open and close the shut-off button cover by removing the screw for the shut-off button without opening the terminal cover. Therefore, when a contractor opens the terminal cover to run wiring, they will not accidentally operate the shut-off button and shut off the gas meter. Furthermore, since consumers will not open the terminal cover by operating the shut-off button, the waterproofness of the terminal can be ensured. A second embodiment of the present invention is a gas meter according to the first embodiment, wherein the control board has a terminal section located below the display section and a terminal section located on on