JPS589319Y2 - number car fast forwarding device - Google Patents

Description

[Detailed description of the invention] This invention relates to a fast-forwarding device for a number wheel that displays the consumption of electricity, gas, water, etc., and in particular to a fast-forwarding device for a number wheel that prevents misreading during meter reading. .

FIG. 1 is a perspective view showing a conventional fast-forwarding device for number wheels.

In FIG. 1, gear 1 is connected to a rotating disk shaft (not shown) of a power meter.

The number wheel 2 at the lowest digit displays the amount of power used to the first decimal place, and is rotatably attached to the rotating shaft 3.

The gear 4 is fixed to one side of the number wheel 2 and meshes with the gear 1.

The engagement pin 5 is attached to the other side of the number wheel 2.

The engaging body 6 is rotatably attached to the rotating shaft 3, and has a notch 6a formed in its circumferential surface.

The weight I is attached to the surface of the engaging body 6 facing the number wheel 2 and engages with the engaging pin 5, and due to the weight of the weight I, the engaging body 6 is normally in a state where the weight T is at the lowest position. , that is, it is stationary at a position directly below the axis 3.

In FIG. 1, in order to show the weight T in the drawing, the weight γ is shown at the top (directly above the shaft 3).

The feed wheel 8 has long teeth 8a that engage with the notch 6a and the notch 6a.
Short teeth 8b that do not engage are arranged alternately,
It is rotatably attached to the rotating shaft 9.

The gear 10 is rotatably attached to the rotating shaft 3, and the feed wheel 8
The long tooth 8a and the short tooth 8b mesh with each other.

The number wheel 11 of the second lower digit displays the amount of power used in one digit, and is attached to the gear 10 and rotatably attached to the rotating shaft 3.

Next, this operation will be explained.

When a rotating disk (not shown) of the watt-hour meter rotates in proportion to the power used, the rotation is transmitted to gear 4 via gear 1.

Therefore, the number wheel 2 of the lowest digit rotates in the direction of the arrow in the figure.

The retaining pin 5 rotates in the direction of the arrow as the number wheel 2 rotates, and when the engaging pin 5 rotates to the lowest position (directly below the shaft 3), the engaging pin 5 engages with the weight I. .

When the engagement pin 5 engages with the weight I, the engagement body 6 rotates together with the number wheel 2 of the lowest digit in the direction of the arrow in the figure.

The engaging body 6 rotates in unison with the number wheel 2 until the weight I reaches the top position (directly above the shaft 3), but when the weight 7 reaches the top position (directly above the shaft 3), When it passes, the engaging body 6 rapidly rotates due to the weight of the weight T until the weight T reaches the lowest position (directly below the shaft 3).

That is, the engaging body 6 rapidly rotates by 1/2 turn.

While the engaging body 6 momentarily rotates by half a rotation in this way,
The notch portion 6a is configured to engage the long tooth 8a only once.

Therefore, the feed dog 8 rotates, meshes with the gear 10, and rotates the number wheel 11 by one number.

The number wheels 2 and 11 each have numbers O to 9 printed on their outer peripheral surfaces, and when the number O on the number wheel 2 appears on the measuring window (not shown), the number wheels 2 and 11 are attached to the engaging body 6. The positions of the engagement pin 5 and the weight I are determined so that the position of the weight T passes through the topmost state (directly above the shaft 3).

However, in this conventional number wheel fast-forwarding device, when the number 9 of the lowest digit number wheel 2 appears in the weighing window (not shown), the weight T is positioned on the hinge (directly above the shaft 3). ), the engaging body 6 is in a position on the verge of falling due to the weight of the weight T, and is in an extremely unstable state.

For this reason, if vibration or shock from the outside occurs,
The engaging body 6 rapidly rotates by half a rotation due to the weight of the weight I, causing the number wheel 11 of the second lowest digit to rotate by one digit.

At this time, when you read the electricity consumption meter, the lowest digit number wheel 2
The number 9 is displayed, and the number wheel 11 in the second lower digit is incremented by one number.

Therefore, the integrated calculated value will be read 1 Kwh more than the true value.

For example, if the number of passengers on the weighing device is 1 x 1000, then 100
The measured value corresponding to 0KWhK will be misread, which is an unfavorable result for a metering device that is the basis of fair electricity rate transactions.

This invention was made to improve the drawbacks of the conventional device, and in particular, to prevent misreading of measured values without adding any extra parts or devices to the conventional device.

This invention will be explained below with reference to the drawings.

FIG. 2 is a perspective view showing an embodiment of a fast-forwarding device for number wheels according to this invention.

FIG. 8 is a plan view showing the relationship between the number display position of the number wheel of the lowest digit and the number display position of the engaging body.

In the figure, the same parts as in FIG. 1 are given the same reference numerals.

The difference between the device of this invention shown in FIG. 2 and the conventional device shown in FIG. 1 is that the number 9 is printed on the outer peripheral surface of the engaging body 6, and other components are different from the conventional device. Since they are exactly the same and their operations are also exactly the same, a description of the overall configuration and operation of the device will be omitted.

Now, in the state shown in FIG. 2, the weight T of the engaging body 6 is
is near the top state (directly above axis 3) and is in an extremely unstable state.

At this time, when the engaging body 6 rapidly rotates due to external vibration or impact and drops the weight, the number on the number wheel 11 in the lower second digit is momentarily rotated by one number.

However, at this time, the number 9 of the engaging body 6 does not appear on the measurement window.

Therefore, if the meter is read at this time, even if the number wheel 2 of the lowest digit is displaying 9, in this case, it is determined that the number wheel 11 of the second lower digit has already rotated by one digit and processing is performed. There is no fear of misreading.

Further, as shown in FIG. 3, the position of the number 9 printed on the outer peripheral surface of the engaging body 6 is changed between the number 9 and the number O on the number wheel 2 of the lowest digit just before the engaging body 6 falls and rotates. Near the center,
If the end of the number 9 overlaps the beginning of the number O, the rotating disk of the electricity meter will rotate at a low speed, and the number wheel of the lowest digit will appear in the measurement window as shown in Figure 2. Even when both the number 9 of 2 and the number O are displayed, the number wheel 11 of the lower second digit is determined by determining whether or not the number 9 of the engaging body 6 is displayed on the measuring window. Can read numbers accurately.

In the above embodiment, the case of a power meter is shown, but the present invention can be applied to various devices using numeric wheels, such as a gas meter, a water meter, and an integrated hour meter.

As described above, according to this invention, the value of the number wheel can be read accurately by simply attaching the number 9 to the engaging body 6, without adding any extra parts or devices to the conventional device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional fast-forwarding device for number wheels. FIG. 2 is a perspective view showing an embodiment of a fast-forwarding device for number wheels according to this invention. FIG. 3 is a plan view showing the relationship between the number display position of the number wheel of the lowest digit and the number display position of the engaging body. In the figures, the same parts are given the same reference numerals, 2 is the number wheel of the lowest digit, 3 is the rotating shaft, 5 is the engagement pin, 6 is the engagement body, 6a is the notch, T is weight, 8
is a feed wheel, 8a is a long tooth, 8b is a short tooth, 9 is a rotating shaft, 10
is the gear, and 11 is the number wheel for the second lower digit.

Claims (1)

[Scope of utility model registration request] a number wheel for the lowest digit that rotates in accordance with the quantity to be measured; an engaging body that is attached to the same rotating shaft as the number wheel for the lowest digit and has a notch formed on its circumferential surface; and the least significant digit of the engaging body. A weight attached to a surface facing the number wheel of the lowest digit, a retaining pin attached to the number wheel of the lowest digit and engaging the weight, and a retaining pin rotatably attached to a rotation axis different from the rotation axis of the engaging body. A feed wheel that alternately has long teeth that engage with the notches of the engaging body and short teeth that do not engage, the front = U wheel that meshes with the long teeth and short teeth and is installed on the same rotation shaft as the engaging body. gear,
and a lower second digit number wheel coupled to the gear,
Every time the number wheel for the lowest digit rotates by a predetermined angle in a predetermined direction, the weight of the weight momentarily rotates the number wheel for the second lower digit by one digit, and the number wheel for the lowest digit is rotated by one number. A fast-forwarding device for a number wheel, characterized in that the number 9 is attached to the circumferential surface of the engaging body so as to be located between 9 and O.