JPS5841458Y2 - Water meter excess usage display device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an excess amount display device used in a measuring instrument such as a water meter.

Generally, measuring instruments such as water meters or gas meters have a guarantee limit such as an effective usage period or an effective usage amount in order to maintain their accuracy.

Of these, the effective period of use can be determined by the approval seal or certification seal.

On the other hand, the effective usage amount is known from the scale display on the scale, but the display on the scale returns to zero when the maximum indication range of the scale is exceeded, that is, when all the digits on the scale display have gone through one cycle. Because of this, it is difficult to know the actual integrated amount just from the scale display, and you have to rely on your memory.

As a result, people overlook the fact that the effective usage amount has been exceeded and neglect to adjust the water meter, which can lead to malfunctions.

In view of the above-mentioned circumstances, this invention aims to provide a device that displays an excess amount of usage for a measuring instrument, which displays a warning when the effective amount of usage is exceeded, and continues to display the warning to call attention to the amount used. be.

Hereinafter, embodiments of this invention will be further explained based on the drawings.

FIG. 1 is a partial vertical sectional view of a water meter, FIG. 2 is a display section of the water meter, and FIG. 3 is a partially enlarged view of a gear train.

A water meter M, which is one of the measuring instruments, has a measuring section M1 and a display section M2 in a lower case 1.

The measuring part M1 is provided with a freely rotatable tangential impeller (not shown) in a flow channel that is continuous with the inlet of the lower case 1.

The flow of water rotates this impeller, and the flow rate is determined by the rotational speed.

The rotation of the impeller is decelerated by the gear train 2 and displayed on the display section M.
2.

Each gear of the gear train 2 is rotatably supported between a bearing plate 3 and a base plate 4.

Seven rotating shafts 5 of this gear train 2 pass through the upper base plate 4 and protrude into a concave space 6 provided at the upper part of the base plate 4.

A scale display plate 7 is provided at the bottom of the concave space 6, and six of the rotary shafts 5 protruding into the concave space 6 are connected to the scale display plate 7. A pointer 8 is fixed to the tip of the pointer 8 so as to protrude from the point.

The other rotating shaft 5 has its tip positioned between the base plate 4 and the scale display plate 7, and fixes the circular movable display plate 9 thereto.

The six rotating shafts 5 pass through the centers of the six circular scales 10 provided on the periphery of the scale display plate 7, and the pointers 8... The scale is indicated by rotating within the circular scale 10, which is divided into ten equal parts.

This circular scale 10 has different digits, and the minimum scale unit of flow rate is 11, and the maximum unit is 1.
00m3.

A display window 11 is provided at an appropriate position on the scale display board 7, and the movable display board 9 is installed so as to overlap this display window 11.

The movable display board 9 is a circular warning display body that rotates along with the rotating shaft 5, and its surface is color-coded into a white part 9a having a larger area than the display window 11, and the remaining part is a red part 9b. do.

One end of the lever 12 is fixed to the middle part of the rotating shaft 51, a coiled spring 13 is spirally wound around the rotating shaft 5□, one end of which is locked to the lever 12, and the other end is locked to the bearing plate 3. A counterclockwise rotational force is constantly applied.

Further, the other end of the lever 12 is pressed against the convex portion 14a of the gear 14.

The gear 14 is coaxial with the pointer 8□ representing the maximum digit of the display section, and an arcuate convex portion 14a is provided on the outer edge of the side surface of the gear 14.

This protrusion 14a is provided at different positions depending on the effective usage amount setting value of the water meter, and the end of the lever 12 is connected to the protrusion 14a.
It is pressed against the outer circumferential surface of a by the rotational force of the spring 13.

A glass 16 is placed on the upper surface of the display section M2 housed in the lower case 1 with a waterproof gasket 15 interposed therebetween.

A packing 17 is further placed on the top surface of the glass 16 and pressed by an upper case 18.

The upper case 18 has a through hole 19 in its center for viewing the scale display plate 7, and supports an upper lid 20 for protecting the glass 16 so as to be openable and closable.

In FIG. 4, the rotational force from the impeller is transmitted to rotate the gear 14, and when the effective usage amount is reached, the lever 12 is removed from the convex portion 14a.

The lever 12 is rotated clockwise by the rotational force of the spring 13 and comes into contact with the stopper 21, and its rotation is prevented.

At this time, the movable display plate 9 also rotates together with the lever 12,
As shown in FIG. 5, the white part 9a of the movable display body 9 that had appeared on the display window 11 has moved and the red part 9b has appeared on the display window 11, indicating that the movable display board 9 has reached its effective usage amount. shows.

After that, the convex portion 14a and the lever 12 do not come into contact with each other, so
Even if the meter is continued to be used as it is, the display window 11 continues to display that the effective usage amount has been exceeded.

In the above embodiment, the convex portion 14a that the lever 12 comes into pressure contact with is provided on the gear 14 provided on the rotation axis 5□ of the maximum unit pointer 8□ of the display scale 10.

This is 10 if the minimum unit of water meter M is 11.
Since all the pointers 8 return to zero at 00 m3, this is the configuration for setting the effective usage amount to, for example, 101 to 999 m. Other gears, for example 10m
Of course, it is possible to provide a convex portion on a gear coaxial with the pointer of unit 3 and press it against the gear.

Further, the convex portion 14a is not limited to an arc shape, but may be cam shaped.

Further, as a warning display when the effective usage amount of the water meter M is exceeded, in the above embodiment, the color-coded circular movable display board 9 is rotated to display the warning, but in addition to the colors, letters etc. may also be attached. You can also do that.

As is clear from the above description, according to this invention, it is possible to determine at a glance whether the effective usage amount of the measuring device is exceeded, and there is no need to memorize the effective usage amount.

Furthermore, since appropriate adjustments and repairs can be made to the measuring instrument, accuracy can be maintained.

In addition, the movable display board that issued the warning will not return to its original state and become in a state of no warning.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a water meter showing an embodiment of this invention, Fig. 2 is a plan view of its display section, Fig. 3 is a partially enlarged view of the gear train, and Fig. 4 is a warning display device. Partial plan view of 5th
The figure shows a state in which the movable display board can be opened from the display window. 2... Gear train, 5... Shaft, 8...
...Pointer, 9...Movable display board, 11...
・Display window, 12...Lever, 13...
Spring, 14... Gear, 14 a... Protrusion.

Claims (1)

[Scope of utility model registration request] In a water meter that displays the usage amount with a pointer fixed to the tip of the shaft of a gear train, a convex part is provided on the side of the gear that is fixed coaxially with the pointer indicating the maximum digit, and the rotation axis of the movable display board that displays a warning on the display. An over-consumption display device for a water meter, in which one end of a lever is fixed to a lever, a spring applies rotational force in one direction to the rotating shaft, and the other end of the lever is pressed against the convex portion.