JPH0548152U - Reset device for fluidic gas meter - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a reset device that does not allow rainwater or dust to enter, has a small amount of protrusion, and has a small pushing force. [Structure] Instead of an O-ring, the mounting hole 12 and the reset button 14 are covered with a seal cover 15 to eliminate the return spring. [Effect] Since the mounting hole 12 and the reset button 14 are covered with the seal cover 15, rainwater and dust do not enter and the reset spring is eliminated, so that the reset button 14 has a small protruding amount and a small pushing force. ..

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reset device in a fluidic gas meter.

[0002]

[Prior Art]

 In the fluidic gas meter, a shutoff valve is attached to the gas inlet path to the fluidic element, and this shutoff valve is configured to close based on a signal from a gas safety circuit using a microcomputer and an earthquake detector. .. After shutting off the shut-off valve, it is necessary to return it manually after the safety check is completed. For this reason, a reset button is attached to the front or side of the meter. As shown in FIG. 5, this reset button is provided with a mounting hole 02 with an O-ring 03 in the casing 01, the shaft 05 of the reset button 04 is inserted into the mounting hole 02, and the reset button 04 and the casing 01 are returned. It has a structure in which a reset spring 06 is incorporated and the reset button 04 once pushed by the reset spring 06 is restored.

[0003]

[Problems to be solved by the device]

 Therefore, there are the following problems.

A. Since the O-ring 03 is attached to prevent the entry of rainwater and dust, the slide resistance increases accordingly.

B. When the return spring 06 is incorporated, the reset button 04 protrudes from the casing 01 by this amount and the appearance is deteriorated, and the object is easily hit.

C. When the reset button 04 is pressed, the elastic pressing force of the return spring 06 increases.

An object of the present invention is to provide a reset device in a fluidic gas meter which requires a small amount of protrusion of the reset button and a small pressing force.

[0008]

[Means for Solving the Problems]

 The structure of the reset device according to the present invention is as follows.

The reset shaft of the shutoff valve is extended to the vicinity of the inner wall surface of the casing, the casing facing the reset shaft is provided with a reset button mounting hole, and the reset button is installed in the mounting hole so that the reset button can move freely in and out. A reset device for fluidic gas meters, characterized in that the part side is covered with a rubber seal cover attached to the outer wall of the casing.

[0010]

[Action]

 When the shut-off valve operates and resets, the operator pushes the reset button head from above the seal cover with his finger. In this way, the reset shaft of the shutoff valve is pushed in to perform resetting, and the resetting force of the reset shaft also resets the reset button to the original position. The seal cover is self-recovering due to rubber elasticity.

[0011]

【Example】

 Reference numeral 1 denotes a meter casing, in which a fluidic element 2, various electric circuits 3, and a shutoff valve 4 are incorporated. Reference numeral 5 is a gas inlet, and 6 is a gas outlet. 7 is a valve seat formed in a part of the gas inlet passage 5, and the valve 8 of the shut-off valve 4 is in close contact with the valve seat 7 to stop gas. Reference numeral 9 is a spring for pushing the valve 8 toward the valve seat 7, and 10 is a valve shaft.

Reference numeral 11 is a reset shaft incorporated to push in the valve shaft 10.

Reference numeral 12 denotes a reset button mounting hole provided in the casing 1 facing the reset shaft 11.

A reset button 14 includes two legs 14 b which are installed so as to reach the inside of the casing 1 through the mounting hole 12 and have a small play with the reset shaft 11. The periphery of the casing 1 is fixed to the casing 1 by screws 16 and a presser foot 17, and is a rubber seal cover that covers the mounting hole 12 and the reset button 14 (the head 14a of the reset button 14) from the outside.

In the reset device described above, when the head 14a of the reset button 14 is pushed with a finger from the outside of the seal cover 15 at the time of reset, the seal cover 15 is deformed inward, and at the same time, the two tip legs 14b of the reset button 14 are moved. The head 11a of the reset shaft 11 is pushed in to reset. The reset button 14 is returned by the returning force of the reset shaft 11, and the seal cover 15 is self-recovered by rubber elasticity.

[0016]

[Effect of the device]

 As described above, in the present invention, since the mounting hole and the reset button are covered with the seal cover instead of the O-ring, there is no fear that rainwater or dust will enter the meter through the mounting hole portion of the reset button. As a result, the accuracy can be maintained for a long time in a gas meter that is often installed outdoors.

Next, since a spring is not incorporated for returning the reset button, there is an advantage that the protrusion amount of the reset button is reduced by this spring, an object is hard to hit, the appearance is improved, and the pushing force is small.

[Brief description of drawings]

FIG. 1 is a front view showing the inside of a fluidic gas meter.

FIG. 2 is a sectional view taken along line AA.

FIG. 3 is a sectional view of a reset device.

FIG. 4 is a front view of the reset device.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Casing 2 Fluidic element 4 Shut-off valve 7 Valve seat 8 Valve 10 Valve shaft 11 Reset shaft 12 Mounting hole 14 Reset button 15 Seal cover

Claims (1)

[Scope of utility model registration request] 1. A reset shaft of a shutoff valve is extended to near an inner wall surface of a casing, a reset button mounting hole is provided on a side of the casing facing the reset shaft, and a reset button is freely installed in and out of the mounting hole and reset. A reset device for a fluidic gas meter, characterized in that the head side of the button is covered with a rubber seal cover attached to the outer wall of the casing.