JP2015011022A - Automatic wiring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic wiring apparatus that is adaptable to multiple types of watt-hour meters and can be used for performance testing of many watt-hour meters without inviting power transmission loss.SOLUTION: An automatic wiring apparatus has two conducting terminals arranged in mutually opposing positions and conducting terminal shifting means that shifts one or both of the conducting terminals in the widthwise direction. When the apparatus is used for testing, current terminals of watt-hour meters, the current terminals being arranged between the two conducting terminals, are brought into a state of being held between the conducting terminals by the shifting of one or both of the conducting terminals by the conducting terminal shifting means, and the conducting terminals and the current terminals are brought into contact with each other. Also, in order to prevent the automatic wiring apparatus from becoming open when no watt-hour meter is set, the apparatus is provided with a conducting part for short-circuiting use.

Description

The present invention relates to an automatic connection device for electrically connecting a watt hour meter and a test device for supplying test power to the watt hour meter in order to perform a performance test of the watt hour meter, particularly an electronic watt hour meter. .

Electricity meters that measure power consumption are installed in buildings such as ordinary houses, stores, factories, etc., and electricity charges charged by power companies are calculated based on the power consumption information measured by the electricity meters. Is done. For this reason, if the power consumption is not accurately measured in the watt hour meter, the calculation of the power charge will be incorrect. In order to avoid such a situation, a performance test is performed to confirm whether or not an accurate operation is ensured for the watt-hour meter before distribution.

Here, the outline of the watt-hour meter 30 will be described with reference to FIG. 7 (however, in addition to the watt-hour meter shown in FIG. 7, there are watt-hour meter types having different shapes and structures. The watt-hour meter 30 shown in FIG. 7 will be described as an example.) FIG. 7A is a front perspective view of the watt hour meter 30, and FIG. 7B is a rear view of the watt hour meter 30. The watt-hour meter 30 has a box shape, a display unit 30a for displaying the measured power amount is provided on the front surface, and a plurality of current terminals engaged with an external power transmission cable on the back surface. 31 and a voltage terminal 32 are provided. When a test current and a test voltage are supplied to the watt hour meter 30 through the current terminal 31 and the voltage terminal 32, the amount of power used is calculated by a calculation means (not shown) provided therein, and the display The power consumption is displayed in the section. Even with the same shape and structure, the dimensions of the watt hour meter 30, the current terminal 31, and the voltage terminal 32 may differ depending on the rating.

On the other hand, in the performance test of the watt-hour meter described above, an automatic connection device that electrically connects a test device that is a supply source of test power to the watt-hour meter and the watt-hour meter is used. Techniques related to the automatic connection device are disclosed in, for example, the following patent documents.

The automatic connection device described in Patent Document 1 includes a current measurement terminal connected to a current terminal of a watt hour meter, and a device main body including a movable body that is movably provided with respect to the device main body. The moving body has a pair of spring bodies arranged outside the pair of terminal plates of the current measuring terminal. When the current terminal of the watt-hour meter is fitted between the pair of terminal plates of the current measuring terminal, it is pressed from the terminal plate by the action of the spring body of the movable body arranged outward. As a result, the current terminal and the current measurement terminal come into contact with each other, and the test current can be supplied from the automatic connection device to the watt hour meter.

JP 2010-38767 A

However, the automatic connection device described in Patent Document 1 is configured such that both of the terminal plates of the current measurement terminal are installed in a fixed state and the spring body is disposed adjacent to the outside thereof. Therefore, depending on the dimensions (thickness, length, etc.) of the current terminal, it may occur that the current terminal cannot be fitted between the terminal plates. That is, it is not assumed that different types of watt-hour meters are tested with the same automatic connection device. Therefore, in such a case, there is a problem that measures such as adjusting the distance between the terminal plates of the current measuring terminal or changing the position of the spring body are required.

Further, when the current terminal of the watt hour meter is fitted between the terminal plates of the current measuring terminal, the current terminal is pushed into the back side in a state where the current terminal and the terminal plate are in contact with each other. Therefore, the automatic wire connection device described in Patent Document 1 has a possibility that the current measurement terminal is worn during the test.

In view of the above problems, the present invention is adaptable to a plurality of types of watt-hour meter tests, and has problems such as wear on the current terminals of the watt-hour meter and other components during the test. An object of the present invention is to provide an automatic connection device that does not cause the occurrence.

An automatic connection device according to the present invention for solving the above problems is as follows.
A watt-hour installation section for installing a watt-hour meter, and a test power supply section that has a pair of conduction terminals arranged opposite to each other and also connects to a test device that supplies test power to the watt-hour meter,
Conductive terminal moving means for moving one or both of the conductive terminals in the width direction,
During the test, the current terminal of the watt hour meter is disposed between the pair of conduction terminals, and when the one or both conduction terminals are moved in the width direction by the conduction terminal moving means, the current terminal is The current terminal of the watt-hour meter and the test apparatus are electrically connected to each other by being held between conductive terminals.

In addition, the automatic connection device according to the present invention preferably further includes a watt-hour height adjusting means for adjusting a height of the watt-hour meter when installed in the watt-hour installation section. Or it is preferable that the elastic body which consists of an electroconductive material is arrange | positioned at the inner surface of both the said conduction | electrical_connection terminals. Furthermore, it is preferable to provide a short-circuit conductive portion for enabling electrical connection to another automatic connection device when the conduction terminal and the current terminal of the watt-hour meter are in a non-contact state. In addition, it is preferable that the said short-circuiting electroconductive part is arrange | positioned in the movable range of the said conduction | electrical_connection terminal, ie, the vicinity of the said conduction | electrical_connection terminal.

According to the present invention, after the current terminal of the watt-hour meter is disposed between both conductive terminals, one or both conductive terminals are moved by the conductive terminal moving means, and the current terminal and both conductive terminals are Due to the contact structure, problems such as damage to the current terminal and wear of the conductive terminal can be prevented during the test. Further, by providing the watt-hour height adjusting means, it is possible to test a plurality of types of watt-hour meters having different dimensions, and it is possible to provide an automatic connection device that improves work efficiency.

Schematic which concerns on apparatus arrangement | positioning at the time of performing the performance test of a watt-hour meter. The perspective view and front view of the automatic connection apparatus 10 which concern on this invention before the watt-hour meter is set. The figure which shows the detail of a test electric power supply part. The front view of the automatic connection apparatus 10 provided with measured electric energy information receiving means. The figure which shows the automatic connection apparatus 10 provided with a watt-hour meter height adjustment means. The figure which shows the automatic connection apparatus 10 provided with the electroconductive part for short circuit. The front side perspective view and back view of an watt-hour meter.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention can be implemented in many different modes and should not be construed as being limited to the description of the embodiments described below.

First, with reference to FIG.1 and FIG.2, the whole structure of the automatic connection apparatus which concerns on one Embodiment of this invention is demonstrated. FIG. 1 is a schematic diagram relating to the device arrangement when performing a performance test of the watt hour meter 30, and FIG. 2 is a perspective view of the automatic connection device 10 according to the present invention before the watt hour meter 30 is set (FIG. 2). It is (a)) and a front view (FIG.2 (b)).

As shown in FIG. 1, a plurality of automatic connection devices 10 are connected in series, and one automatic connection device 10 and a test device 20 are electrically connected. Here, the test apparatus 20 is an apparatus that supplies test power to the automatic connection device 10.

The automatic connection device 10 directly connected to the test device 20 is one unit, but since the other automatic connection devices 10 are connected in series with the automatic connection device 10, all automatic connection devices 10 are automatically connected to the test device 20. Test power is supplied to the connection device 10. However, the connection arrangement of the automatic wire connection device 10 is not limited to this.

Next, with reference to FIG. 2, a schematic configuration of the automatic connection device 10 according to the present embodiment will be described. The automatic connection device 10 includes a watt-hour installation unit 100, a test power supply unit 200, a conduction terminal moving unit 300, and the like.

The watt-hour meter installation unit 100 includes a watt-hour meter installation frame 110 having an air space 111 for installing the watt-hour meter 30 inside, a watt-hour meter bottom support portion 120 that supports the bottom surface of the watt-hour meter 30, And a watt-hour meter side support 130 that supports the side of the meter 30. The watt hour meter 30 is inserted into the air space 111 of the watt hour meter installation frame 110 from the back side. The watt hour meter 30 inserted into the airspace 111 is supported by the watt hour meter bottom surface support portion 120 and the watt hour meter side surface support portion 130 while maintaining the same posture. However, the watt-hour meter installation unit 100 is not limited to this as long as the watt-hour meter 30 for testing can be installed and supported.

Next, the test power supply unit 200 will be described with reference to FIGS. The test power supply unit 200 is electrically connected to the test apparatus 20 that supplies test power to the watt hour meter 30 and is also electrically connected to the watt hour meter 30 during the test, so that the test current and the test voltage are supplied. To supply. In the present embodiment, the test power supply unit 200 is arranged on the back side of the watt-hour installation unit 100 as shown in FIG.

The configuration of the test power supply unit 200 includes a first conduction terminal 210 that can contact the current terminal 31 of the watt hour meter 30 installed in the watt hour meter installation unit 100, as shown in FIG. The second conduction terminal 220, which is disposed so as to face the first conduction terminal 210 and can be brought into contact with the current terminal 31 of the watt hour meter 30, and the voltage terminal 32 of the watt hour meter 30, is contacted during the test. And a voltage application unit 230 that applies a test voltage to the watt-hour meter 30. In the present embodiment, the test power supply unit 200 further includes an insulating block 240 to which the second conduction terminal 220 is attached.

Here, the 1st conduction | electrical_connection terminal 210 is connected with the test apparatus 20 via electrical connection means, such as conducting wire. That is, a test current is supplied from the test apparatus 20 to the first conduction terminal 210. Moreover, as shown to Fig.3 (a), it is preferable that the 1st conduction | electrical_connection terminal 210 is fixed in the state standing on the watt-hour bottom face support part 120. As shown in FIG.

Similar to the first conduction terminal 210, the second conduction terminal 220 is connected to the test apparatus 20 via an electrical connection means such as a conducting wire. That is, like the first conduction terminal 210, a test current is supplied from the test apparatus 20 to the second conduction terminal 220. Moreover, the 2nd conduction | electrical_connection terminal 220 is installed in the state movable in the width direction with the insulation block 240 to which self is attached by the conduction | electrical_connection terminal moving means 300 mentioned later. Details of the operation of the second conduction terminal 220 and the like will be described later. Hereinafter, the first conduction terminal 210 and the second conduction terminal 220 may be referred to as a pair of conduction terminals.

At the time of the test, the current terminal 31 of the watt-hour meter 30 is disposed in a region between the first conduction terminal 210 and the second conduction terminal 220. Thereafter, the second conductive terminal 220 moves in the width direction (moves in the direction of narrowing the region between the first conductive terminal 210 and the second conductive terminal 220 that was originally provided). As a result, the current terminal 31 is sandwiched between the first conduction terminal 210 and the second conduction terminal 220, that is, both the conduction terminals are in contact with the current terminal 31 (see FIG. 3B). ), The test power can be supplied from the test power supply unit 200 to the watt hour meter 30.

Thereby, when the watt-hour meter 30 is inserted into the automatic connection device 10 (the state before the movement of the second conduction terminal 220), the first and second conduction terminals 210 and 220 are in contact with the current terminal 31. In addition, since it is not pressed, problems such as damage to the current terminal 31 are not caused. Further, even if the test is performed many times, the first and second conductive terminals 210 and 220 are not worn.

Further, as shown in FIG. 3A, one or both of the first and second conductive terminals 210 and 220 are electrically conductive at the contact point with the current terminal 31 (inner side surface of each conductive terminal). It is preferable to include an elastic member 250 made of When the elastic member 250 comes into contact with the current terminal 31 of the watt hour meter 30, the elastic member 250 is deformed so as to increase the contact area with the current terminal 31. At that time, it is biased in the direction opposite to the direction pressed by the current terminal 31. Therefore, it is possible to almost eliminate the non-contact portion with the current terminal 31 and maintain a good contact state. Therefore, current can be supplied from the first and second conduction terminals 210 and 220 to the current terminal 31 without loss, and accordingly, heat generation at the contact location can be suppressed.

Next, the conduction terminal moving means 300 shown in FIG. 2 includes the second conduction terminal mounting portion 310 on which the second conduction terminal 220 and the insulating block 240 for installing and supporting the second conduction terminal 220 are placed, and this in the width direction. And a second conduction terminal moving part 320 to be moved to the position. The second conductive terminal moving unit 320 may be an air cylinder, an actuator, or the like that can move the second conductive terminal mounting unit 310 by applying a predetermined force. However, the present invention is not limited to this as long as it has the same function.

In the above description, the conductive terminal moving unit 300 moves only the second conductive terminal 220. However, the present invention is not limited to this. For example, after further providing another conduction terminal moving means for moving the first conduction terminal 210 and the current terminal 31 of the watt hour meter 30 is disposed between the first and second conduction terminals 210 and 220, A structure in which both of the conductive terminals move in the directions approaching each other and sandwich the current terminal 31 is also conceivable.

Furthermore, as shown in FIG. 4, the automatic connection device 10 according to the present embodiment may include a measured power amount information receiving unit 400 of the watt hour meter 30. The watt-hour meter 30 normally includes a power amount information transmission unit 30b that transmits information about the measured power amount to the outside as a pulsed light beam. The measured power amount information receiving unit 400 has a function of receiving the test power amount information transmitted from the power amount information transmitting unit 30b of the watt hour meter 30.

Specifically, the measured power amount information receiving unit 400 includes an arm unit 410, a power amount information receiving unit 420, and a shaft unit 430. A power amount information receiving unit 420 is provided at the tip 410 </ b> A of the arm unit 410. The arm portion 410 is pivotally supported by the shaft portion 430 and attached to the watt-hour installation frame 110. Furthermore, the shaft portion 430 is connected to a driving member (not shown) such as a motor. Therefore, when the shaft portion 430 rotates, the arm portion 410 rotates (arrow R in FIG. 4). Accordingly, the power amount information receiving unit 420 attached to the tip 410A of the arm unit 410 moves to a position facing the power amount information transmitting unit 30b of the watt hour meter 30, and the test power amount can be transmitted and received. The power amount information receiving unit 420 may be a photodiode or the like that can receive a pulsed beam emitted from the power amount information transmitting unit 30b. However, when the test power amount information is transmitted via a medium other than the pulsed light, any device or element that can receive the test power information may be used.

In the above description, the configuration of the automatic connection device 10 according to the present embodiment has been described. However, the watt-hour installation unit 100 adjusts the installation height of the watt-hour meter 30 illustrated in FIG. May be further provided. In the present embodiment, the watt-hour height adjusting means 500 is a plate-like member having a size that fits between the two watt-hour side support portions 130. This plate-like member is placed on the watt-hour bottom support 120. Thereby, even if it is a case where the height dimension of the watt-hour meter 30 changes with ratings, the watt-hour meter 30 can be supported, maintaining a predetermined attitude | position. Therefore, the automatic connection device 10 according to the present embodiment can test the plurality of watt-hour meters 30 having different dimensions by providing the watt-hour height adjusting means 500.

However, the form of the watt-hour height adjusting means 500 is not limited to this. For example, a mechanical element or the like that can lift the watt-hour bottom support portion 120 is disposed at the bottom of the watt-hour bottom support section 120. Further, a mechanism that adjusts the height position of the watt-hour meter bottom surface support portion 120 may be used.

Next, the operation of the automatic connection device 10 according to the present embodiment will be described. First, the watt hour meter 30 is inserted into the watt hour meter installation frame 110 (air region 111) of the watt hour meter installation unit 100 manually or automatically. At that time, the current terminal 31 of the watt-hour meter 30 is disposed between the first and second conduction terminals 210 and 220 of the test power supply unit 200.

Thereafter, the second conduction terminal moving part 320 of the conduction terminal moving means 300 is driven, and the second conduction terminal mounting part 310 is moved. Since the second conductive terminal 220 is fixed to the insulating block 240 installed on the second conductive terminal mounting part 310, the second conductive terminal mounting part 310 moves, so that the second The conductive terminal 220 moves in the direction approaching the first conductive terminal 210. As a result, the current terminal 31 of the watt-hour meter 30 is sandwiched between the first and second conduction terminals 210 and 220. As a result, the test current (test power) supplied from the test apparatus 20 can be supplied to the watt hour meter 30 via the first and second conduction terminals 210 and 220 that are in contact with the current terminal 31. .

On the other hand, when the contact state between the current terminal 31 and the first and second conduction terminals 210 and 220 is released, the second conduction terminal moving unit 320 is driven, and the second conduction terminal mounting unit 310 is moved to the above-described state. Move in the opposite direction.

In the above, operation | movement of the automatic wiring apparatus 10 at the time of the test of the watt-hour meter 30 was demonstrated. On the other hand, as shown in FIG. 1, when a plurality of automatic connection devices 10 are connected in series, as shown in FIG. 6A, the second conduction terminal 220 a is connected to the other through the conductor 40 </ b> A. The automatic connection device 10 (hereinafter referred to as “the automatic connection device on the left” for convenience of explanation) is electrically connected. Similarly, the second conduction terminal 220b is connected to the automatic connection device 10 on the left side via the conductor 40B. On the other hand, the second conduction terminal 220c is electrically connected to another automatic connection device 10 (hereinafter referred to as “automatic connection device on the right” for convenience of explanation) via the conductive wire 40C. Similarly, the second conduction terminal 220d is connected to the automatic connection device 10 on the right side via the conductor 40D.

Assuming that the watt hour meter 30 is a three-wire type, in the watt hour meter 30, the current terminals 31a and 31d are connected, and the current terminals 31b and 31c are connected. For this reason, when the watt-hour meter 30 is set and the second conduction terminal 220 is in contact with the current terminal 31, the current supplied from the automatic connection device on the left is the second conduction terminal 220a, Power is transmitted in the order of the current terminal 31a, the current terminal 31d, and the second conduction terminal 220d, and flows to the right automatic connection device 10 (similarly, the current supplied from the left automatic connection device is the second conduction terminal. 220b, current terminal 31b, current terminal 31c, and second conduction terminal 220c are transmitted in this order and flow to the automatic connection device 10 on the right).

On the other hand, if there is even one automatic connection device 10 in which the watt-hour meter 30 is not set, it is in an open state, and power cannot be supplied to all automatic connection devices. Therefore, as shown in FIG. 6A, the short-circuit conductive portions 600a to 600d are arranged in the movable ranges A (regions surrounded by dotted lines) of the second conductive terminals 220a to 220d. Moreover, the 2nd conduction | electrical_connection terminal 220a and 220d are connected via the conducting wire 40E, and the 2nd conduction | electrical_connection terminal 220b and 220c are connected via the conducting wire 40F.

As shown in FIG. 6B, when the conduction terminal 220 is moved in the direction in which the contact with the current terminal 31 is released by the conduction terminal moving means 300, it is within the movable range of the second conduction terminal 220. The short-circuited conductive part 600 and the second conductive terminal 220 are in contact with each other. Thus, even when the second conduction terminal 220 and the current terminal 31 are not in contact with each other, the current supplied from the automatic connection device on the left is the second conduction terminal 220a and the short-circuiting conductive portion 600a. , Power is transmitted in the order of the short-circuiting conductive portion 600d and the second conduction terminal 220d, and flows to the automatic connection device 10 on the right side (similarly, the current supplied from the automatic connection device on the left side is the second conduction terminal 220b. , Power is transmitted in the order of the short-circuiting conductive portion 600b, the short-circuiting conductive portion 600c, and the second conduction terminal 220c, and flows to the automatic connection device 10 on the right side). Therefore, regardless of whether or not the watt-hour meter 30 is set in the automatic wiring device 10, it is possible to flow current from the adjacent automatic wiring device on the left side to the automatic wiring device on the right side without any delay. Efficiency can be improved.

Note that the elastic member 250 described above may be provided at a location where the second conductive terminal 220 is in contact with the short-circuit conductive portion 600 (in contrast, the second conductive terminal of the short-circuit conductive portion 600 is provided. The elastic member 250 may be provided at a contact point with 220. However, in FIG. 6A, only the case where the elastic member 250 is provided on the second conduction terminal 220 side is illustrated. Thereby, the contact state of the 2nd conduction | electrical_connection terminal 220 and the electroconductive part 600 for short circuit can be made more favorable, and the loss in the case of power transmission can be reduced.

10 automatic connection device 20 test device 30 watt-hour meter 31 current terminal 32 voltage terminal 100 watt-hour meter installation section 110 watt-hour meter installation frame 120 watt-hour meter bottom support section 130 watt-hour meter side support section 200 test power supply section 210 One conducting terminal 220 Second conducting terminal 230 Voltage application unit 240 Insulating block 250 Conductive elastic member 300 Conducting terminal moving means 310 Second conducting terminal placement unit 320 Second conducting terminal moving unit 400 Measured energy information Receiving means 410 Arm section 420 Power amount information receiving section 430 Shaft section 500 Power meter height adjusting means 600 Short-circuit conducting section

Claims (4)

A watt-hour installation section for installing a watt-hour meter, and a test power supply section having a pair of conduction terminals arranged at positions facing each other and also connected to a test device for supplying test power to the watt-hour meter. An automatic connection device including:
Conductive terminal moving means for moving one or both of the conductive terminals in the width direction,
During the test, the current terminal of the watt hour meter is disposed between the pair of conduction terminals, and when the one or both conduction terminals are moved in the width direction by the conduction terminal moving means, the current terminal is An automatic wire connection device, wherein the current terminal of the watt-hour meter and the test device are electrically connected to each other by being held between conductive terminals. The automatic connection device according to claim 1, further comprising a watt-hour height adjusting means for adjusting a height of the watt-hour meter when installed in the watt-hour installation section. The automatic connection device according to claim 1 or 2, wherein an elastic body made of a conductive material is disposed on an inner surface of one or both of the conductive terminals. When the conduction terminal and the current terminal of the watt-hour meter are in a non-contact state, further comprising a short-circuiting conductive part for enabling electrical connection with another automatic connection device,
The short-circuiting conductive portion is disposed in the vicinity of the conduction terminal,
The automatic according to any one of claims 1 to 3, wherein when the conducting terminal is moved by the conducting terminal moving means in a direction to release the contact with the current terminal, the conducting terminal is in contact with the short-circuit conducting unit. Termination device.

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