JP6091007B2 - Automatic connection device - Google Patents

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.

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 watt-hour installation section in which a watt-hour meter is installed, a first current terminal contact section that contacts one surface of a current terminal of the watt-hour meter, and a current terminal A second current terminal contact portion in contact with the other surface; and a watt hour meter locking mechanism for locking the watt hour meter to the watt hour meter setting portion, wherein the watt hour meter is installed in the watt hour meter. When the current terminal of the watt hour meter is disposed between the first and second current terminal contact portions, and the first current terminal contact portion is lowered, the current terminal is And an automatic connection device that is clamped by the second current terminal contact portion and that supplies a test current to the watt hour meter.

JP 2012-83319 A

However, the automatic connection device described in Patent Document 1 is locked by a watt-hour locking mechanism disposed at a fixed position when the watt-hour meter to be tested is installed in the watt-hour installation section. Since it is a structure, it has the subject that it is difficult to install watt-hour meters other than the watt-hour meter of the dimension adapted to it.

Moreover, the 1st and 2nd current terminal contact part of an automatic connection apparatus contacts the current terminal of a watt-hour meter planarly. Generally, since the arrangement position of the current terminal varies depending on the type of watt hour meter, even if the position of the watt hour meter locking mechanism is adjusted and a different type of watt hour meter can be installed, the first There is a problem that the contact area between the second current terminal contact portion and the current terminal of the watt hour meter deviates from an optimum value with less power transmission loss. Therefore, a malfunction may occur in the scene where test power is sent from the test apparatus to the watt hour meter. Therefore, since it is assumed that the automatic connection device described in Patent Document 1 is performed only for a specific type of watt-hour meter test, there is a problem in terms of work efficiency in the test.

In view of the above problems, the present invention can be adapted to a test of a plurality of types of watt-hour meters and can reduce the working time, and at the time of the test, the test power is sent from the test apparatus to the watt-hour meter without loss. It is an object of the present invention to provide an automatic connection device capable of performing the above.

An automatic connection device according to the present invention for solving the above problems is as follows.
A test power that has a watt hour meter installation section for installing a watt hour meter and a plurality of electrical connection terminals that are connected to external terminals provided in the watt hour meter, and is also connected to a test device that supplies test power to the watt hour meter Including a supply section,
The electrical connection terminal includes a contact portion that contacts an external terminal of the watt-hour meter,
At least one of the electrical connection terminals has a plurality of the contact portions,
A plurality of contact portions provided on one electrical connection terminal are arranged at different positions,
The contact portion that contacts the external terminal is switched according to the type of the watt hour meter installed in the watt hour meter installation portion.

Moreover, the automatic connection device according to the present invention is
Watt-hour meter discriminating means for discriminating the type of watt-hour meter installed in the watt-hour meter installation section;
In accordance with the type of watt hour meter determined by the watt hour meter determining means, conductive terminal selecting means for selecting an electrical connection terminal in a conductive state and an electrical connection terminal in a non-conductive state;
Is preferably further provided.

Furthermore, the automatic connection device according to the present invention is:
A watt-hour meter installation section for installing a watt-hour meter, and a test apparatus that has a plurality of electrical connection terminals provided with contact portions that come into contact with external terminals provided in the watt-hour meter, and that supplies test power to the watt-hour meter Including a test power supply unit to be connected,
Watt-hour meter installation position adjusting means for adjusting the watt-hour meter installation position;
Watt-hour meter discriminating means for discriminating the type of watt-hour meter installed in the watt-hour meter installation section;
In accordance with the type of watt hour meter determined by the watt hour meter determining means, conductive terminal selecting means for selecting an electrical connection terminal in a conductive state and an electrical connection terminal in a non-conductive state;
It is characterized by providing.

According to the present invention, at least one of the electrical connection terminals has a plurality of contact portions that come into contact with each of the external terminals of the watt hour meter arranged at different positions for each type. Therefore, it is possible to provide an automatic connection device that can test a plurality of types of watt-hour meters and can send test power to the watt-hour meter without loss.

Further, according to the present invention, by providing the watt-hour installation position adjusting means, the external terminals can be arranged at substantially the same position regardless of the type of watt-hour meter installed in the watt-hour installation section. . Therefore, it is possible to provide an automatic connection device that can test a plurality of types of watt-hour meters and can send test power to the watt-hour meter without loss.

The front view of the automatic connection apparatus 10 of the state in which the watt-hour meter 21 was installed. The side view of the automatic connection apparatus 10 in the state in which the watt-hour meter 21 was installed. The front view of the automatic connection apparatus 10 in the state in which the watt-hour meter 22 was installed. The side view of the automatic connection apparatus 10 in the state in which the watt-hour meter 22 was installed. The figure which shows the circuit which switches the conduction | electrical_connection state / non-conduction state of the electrical connection terminal 210. FIG. The perspective view which shows the automatic connection apparatus 60 before and after the watt-hour meter 21 is installed. The perspective view which shows the automatic connection apparatus 60 before and after the watt-hour meter 22 is installed.

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.

With reference to FIGS. 1 to 5, an automatic connection device 10 according to a first embodiment of the present invention will be described. FIG. 1 is a front view of the automatic connection device 10 in a state where the watt hour meter 21 is installed, and FIG. 2 is a side view of the automatic connection device 10 in a state where the watt hour meter 21 is also installed. 3 is a front view of the automatic connection device 10 in a state where a watt hour meter 22 of a type different from the watt hour meter 21 shown in FIGS. 1 and 2 is installed, and FIG. It is a side view of automatic connection device 10 in the installed state. FIG. 5 is a diagram showing a circuit that switches between a conductive state and a non-conductive state of an electrical connection terminal that performs electrical connection between the watt-hour meter to be tested and the automatic connection device (details will be described later).

Before describing the details of the automatic connection device according to the present invention, a watt hour meter to be tested will be described. The watt hour meter has a display unit 23 that displays the measured electric energy, and an external terminal 24 that is connected to an external power source (for example, a distribution line) and a load. Current / voltage is input / output between the watt hour meter and the external power source / load via the external terminal 24. However, the number or arrangement position of the external terminals 24 differs depending on the type of watt-hour meter.

The watt-hour meter 21 shown in FIGS. 1 and 2 is a single-phase two-wire (30A) watt-hour meter, and includes three external terminals 24 connected to an external power source or a load. The external terminals 24 of the watt-hour meter 21 are a 1S terminal, 2S / 2L terminal, and 1L terminal from the left in the figure. Inside the watt hour meter 21, the 1S terminal and the 1L terminal are connected via a first current coil (not shown) for current measurement. As a result, a first current circuit (not shown) including the 1S terminal, the 1L terminal, and the first current coil is formed. Further, the 2S / 2L terminal is connected to a contact provided in the above-described first current circuit via a first voltage coil (not shown) for voltage measurement. The power consumption (the test power at the time of the performance test) is calculated based on the current and voltage generated in the first current coil and the first voltage coil. On the other hand, the watt-hour meter 22 shown in FIGS. 3 and 4 is a single-phase three-wire type or three-phase three-wire (60A) watt-hour meter, and includes five external terminals. The external terminals of the watt-hour meter 22 are the 1S terminal, 3S terminal, 3L terminal, 2S / 2L terminal, and 1L terminal from the left in the figure. Inside the watt hour meter 22, the 1S terminal and the 1L terminal are connected via a first current coil (not shown) for current measurement. Thereby, as in the case of the watt-hour meter 21, a first current circuit (not shown) including the 1S terminal, the 1L terminal, and the first current coil is formed. The 3S terminal and the 3L terminal are connected via a second current coil (not shown). As a result, a second current circuit (not shown) including the 3S terminal, the 3L terminal, and the second current coil is formed. Further, the 2S / 2L terminal is connected to the contact provided in the first current circuit through the first voltage coil (not shown), and the second voltage coil is connected to the second voltage coil. It is connected to a contact provided in the current circuit. The power consumption (in the performance test, the test power) is calculated based on the current and voltage generated in the first and second current coils and the first and second voltage coils.

Moreover, the arrangement position of the external terminal 24 of the watt-hour meter when the watt-hour meter is installed in the automatic connection device 10 is different because the watt-hour meter has a different size for each type. Specifically, since the watt hour meter 21 is smaller than the watt hour meter 22, the arrangement position of the external terminal 24 of the watt hour meter 21 is compared with the arrangement position of the external terminal 24 of the watt hour meter 22. The automatic wiring device 10 is disposed below the substrate 110 (details will be described later) and at a position close to the substrate 110 (see FIGS. 2 and 4).
However, the watt-hour meter shown in FIGS. 1 to 4 is merely an example, and is not limited to this.

Next, the configuration of the automatic connection device 10 according to the first embodiment will be described. The automatic connection device 10 includes a watt-hour meter installation unit 100, a test power supply unit 200, a watt-hour meter determination unit 300, a conduction terminal selection unit 400, and the like. Hereinafter, each component will be described.

The watt hour meter installation unit 100 is for installing and fixing the watt hour meters 21 and 22 to be tested. The substrate 110 on which the watt hour meters 21 and 22 are placed, and the power placed on the substrate 110. It includes a watt hour meter locking portion 120 for locking the watt hour meters 21 and 22 and a guide portion 130 for fixing the position of the watt hour meters 21 and 22 in the width direction.

A recess having a predetermined shape is formed on the back surface 25 of the watt hour meters 21 and 22. Here, the watt hour meter is locked on the base 110 by engaging the watt hour meter locking portion 120. Here, the substrate 110 is provided with both a watt-hour locking portion 121 for locking the watt-hour meter 21 and a watt-hour locking portion 122 for locking the watt-hour meter 22.

In addition, a through hole 111 is provided at the installation position of the electricity meter locking portion 121 on the substrate 110. When the watt-hour meter 22 is placed on the substrate 110, the watt-hour locking portion 121 contacts and is pressed against the back surface 25 of the watt-hour meter 22, but the watt-hour meter is provided by providing the through hole 111. The locking part 121 is inserted through the through hole 111. Thereby, the tip of the watt-hour locking portion 121 protrudes to the back side of the substrate 110.

The guide portion 130 includes a contact portion 131 that contacts the side surfaces of the watt hour meters 21 and 22 placed on the substrate 110, and a support portion (not shown) that supports the contact portion 131 so as to be movable in the width direction. Have. In the present embodiment, a spring that biases in the opposite direction to the pressing direction is used as the support portion. When the side surfaces of the watt-hour meters 21 and 22 come into contact with the contact portion 131 of the guide portion 130, both contact portions 131 are pressed and moved to the outside of the substrate, respectively. On the other hand, a biasing force in the direction opposite to the pressing direction is generated in the support portion. The movement of the contact portion 131 stops at a position where the pressing force and the biasing force are balanced. As described above, by providing the guide unit 130 that is movable in the width direction and urges the watt hour meters 21 and 22, it is possible to fix the width direction positions of the watt hour meters 21 and 22 having different width dimensions. it can.

Next, the test power supply unit 200 is connected to a test apparatus (not shown) to supply test power to the watt hour meters 21 and 22, and is connected to the external terminal 24 of the watt hour meters 21 and 22. The connection terminal 210 and the raising / lowering part 220 for raising / lowering the position of the electrical connection terminal 210 are included. Here, as a test method for the watt hour meters 21 and 22, a voltage source and a current source are separately connected to the watt hour meters 21 and 22, respectively, and a test voltage is supplied from the voltage source and a test current is supplied from the current source. It is preferable to use the imaginary load test method (in the case of the present invention, the watt hour meters 21 and 22 are connected to the current source and the voltage source via the test power supply unit 200). This is because the test power supplied to the watt hour meters 21 and 22 can be greatly reduced as compared with the case where the test is performed with the load connected to the watt hour meters 21 and 22. Therefore, it is preferable that the above-described test apparatus includes a voltage source and a current source connected to the watt hour meters 21 and 22. Therefore, when using the imaginary load test method, the imaginary load test power is supplied from the test apparatus to the watt hour meters 21 and 22. However, the test method of the watt hour meters 21 and 22 is not limited to this (hereinafter referred to as “test power”, without distinguishing the test method, from the test device to the watt hour meter for performance test. Refers to the power supplied to

As shown in FIGS. 1 and 3, in the present embodiment, the test power supply unit 200 includes five electrical connection terminals 210a to 210e. Each electrical connection terminal 210 has a contact portion 230 that contacts the external terminal 24 of the watt hour meter. Here, each of the electrical connection terminals 210a, 210c, and 210d is provided with one contact portion 231 that contacts the external terminal 24 (1S, 2S / 2L, 1L) of the watt hour meter 21, and the electrical connection terminals 210a to 210e. Are provided with one contact portion 232 in contact with the external terminal 24 (1S, 3S, 3L, 2S / 2L, 1L) of the watt-hour meter one above the contact portion 231. That is, two types of contact portions 230 are provided at different positions on the electrical connection terminals 210a, 210c, and 210d.

2 and 4, the contact portion 231 is attached to an extension portion 212 that extends from the base portion 211 of the electrical connection terminal 210 toward the substrate 110, whereas the contact portion 232 has a base portion 211. Attached directly to. That is, the contact portion 231 is disposed at a position closer to the substrate 110 than the contact portion 232. The base portion 211 and the extension portion 212 of the electrical connection terminal 210 are made of a conductive material.

As described above, the external terminal 24 of the watt hour meter 21 and the external terminal 24 of the watt hour meter 22 are different in arrangement position when installed in the automatic wiring device 10. Therefore, by providing two types of contact portions 231 and 232 having different positions on one electrical connection terminal 210 (210a, 210c, and 210d), the watt-hour meters 21 and 22 having different arrangement positions of the external terminals 24 can be automatically operated. Even if it is a case where it installs in the wiring apparatus 10, the external terminal 24 and the contact part 230 (231,232) can be made to contact. That is, the contact portion 230 that contacts the external terminal 24 can be switched according to the type of watt-hour meter installed in the automatic connection device 10. Thereby, the performance test of a plurality of types of watt-hour meters can be performed with one automatic connection device, work efficiency can be improved, and the manufacturing cost of the device can be reduced. Moreover, since all the area | regions of the contact part 230 contact the external terminal 24, test electric power can be supplied to a watt-hour meter without loss. Although FIG. 1 shows the case where the number of contact portions 230 provided in the electrical connection terminals 210a, 210c, and 210d is two, the number may be three or more.

The elevating unit 220 includes a piston 221 that engages with the electrical connection terminal 210 and a drive unit 222 that moves the piston 221 up and down. When the piston 221 is moved up and down by the drive unit 222, the electrical connection terminal 210 is moved up and down in conjunction therewith. Thereby, the contact between the contact part 230 of the electrical connection terminal 210 and the external terminal 24 of the watt-hour meter is controlled or released. In addition, as the drive part 222, an actuator, an air cylinder, etc. can be considered. Further, the control (switching) of the drive unit 222 may be performed manually, or provided with a detection unit (sensor or the like) for detecting that the watt hour meter is installed in the watt hour meter installation unit 100. It may be automatically performed based on the detection information.

Next, the watt-hour meter discriminating means 300 is for discriminating the type of watt-hour meter placed on the substrate 110. In the present embodiment, the watt-hour meter discriminating means 300 is disposed on the back surface of the substrate 110. Further, as the watt-hour meter discriminating means 300, a sensor 310 having infrared light emitting and receiving functions is used.

As shown in FIG. 2, when the watt hour meter 21 is placed on the substrate 110, the watt hour meter locking portion 121 engages with a recess of the watt hour meter 21. Further, since the watt hour meter 21 is smaller in size than the watt hour meter 22, only the watt hour meter locking portion 121 faces the rear surface 25 of the watt hour meter 21. Therefore, the watt-hour locking portion 122 does not contact the watt-hour meter 21 and maintains the position as it is. Therefore, in this case, there is no watt-hour locking portion 120 protruding to the back side of the substrate 110. On the other hand, as shown in FIG. 4, when the watt hour meter 22 is placed on the substrate, it is the watt hour meter locking portion 122 that engages with the recess of the watt hour meter 22. Therefore, the watt-hour locking part 121 located below the watt-hour meter 22 comes into contact with and is pressed. Accordingly, the watt-hour locking portion 121 protrudes to the back side of the substrate 110.

When the watt-hour meter 22 is placed on the substrate 110 and the watt-hour locking portion 121 protrudes on the back side of the substrate 110, the infrared light emitted from the sensor 310 strikes the watt-hour locking portion 121 and is reflected. Then, it returns to the sensor 310 again. The sensor 310 receives the reflected light and detects that there is a protrusion on the back side of the substrate 110. In the present embodiment, the case where there is a protrusion on the back side of the substrate 110 is only when the watt hour meter 22 is placed on the substrate 110. Therefore, when the sensor 310 detects reflected light, it is determined that the watt hour meter 22 is placed on the substrate 110. On the other hand, when the watt-hour meter 21 is placed on the substrate 110, no watt-hour locking portion protrudes from the back surface of the substrate 110. Therefore, when the sensor 310 does not detect reflected light, the substrate 110 It is determined that the watt-hour meter 21 is mounted on. As a result, the type of watt-hour meter placed on the substrate 110 can be specified (discriminated).

Next, the conduction terminal selection unit 400 sets the electrical connection terminal 210 connected to the external terminal 24 of the watt-hour meter to the conduction state according to the type of watt-hour meter determined by the watt-hour determination unit 300 described above. The electric connection terminal 210 that is not connected to the external terminal 24 of the watt-hour meter has a function of switching to a non-conductive state. In the present embodiment, a relay circuit 410 connected to the electrical connection terminal 210 is used as the conduction terminal selection unit 400.

Details of the relay circuit 410 are shown in FIG. Relay circuit 410 includes relays K1 to K4 that control ON / OFF by flowing a current through the coil. In addition, the relay circuit 410 is connected to the voltage source 40 and the current source 50 of the test apparatus and also to the electrical connection terminal 210.

First, when the watt-hour meter discriminating means 300 determines that the watt-hour meter 21 is placed on the substrate 110, in the relay circuit 410, K2 and K4 are turned ON, and K1 and K3 are turned OFF. When K2 is turned ON, one end of the voltage source 40a of the test apparatus is connected to the electrical connection terminal 210c. The other end of the voltage source 40a is always connected to the electrical connection terminal 210a. Therefore, 1S and 2S / 2L of the external terminal 24 of the watt hour meter 21 are connected to both ends of the voltage source 40a of the test apparatus via the electrical connection terminals 210a and 210c (respective contact portions 231 thereof). As a result, the test power can be applied to the watt hour meter 21. Further, when K4 is turned ON, one end of the current source 50a of the test apparatus is connected to the electrical connection terminal 210d. Since the other end of the current source 50a is always connected to the electrical connection terminal 210a, 1S and 1L of the external terminal 24 of the watt hour meter 21 are connected to the electrical connection terminals 210a and 210d (respective contact portions 231). To both ends of the current source 50a of the test apparatus. As a result, a test current can be supplied to the watt-hour meter 21. Therefore, the test power can be supplied to the watt hour meter 21 by forming these connection states.

On the other hand, when the watt-hour meter discriminating means 300 determines that the watt-hour meter 22 is placed on the substrate 110, in the relay circuit 410, K1 and K3 are turned ON, and K2 and K4 are turned OFF. Both ends of the current source 50a of the test apparatus are connected to 1S and 1L of the external terminal 24 of the watt hour meter 22 through the electrical connection terminals 210a and 210e (respective contact portions 232). Further, when K1 is turned ON, one end of the current source 50b of the test apparatus is connected to the electrical connection terminal 210c. The other end of the current source 50b is always connected to the electrical connection terminal 210b. Therefore, 3S and 3L of the external terminal 24 of the watt hour meter 22 are connected to both ends of the current source 50b of the test apparatus via the electrical connection terminals 210b and 210c (respective contact portions 232). As a result, a test current can be supplied to the watt-hour meter 22. Further, when K3 is turned ON, one end of the voltage source 40a of the test apparatus is connected to the electrical connection terminal 210d. The other end of the voltage source 40a is always connected to the electrical connection terminal 210a. Therefore, 1S and 2S / 2L of the external terminal 24 of the watt hour meter 22 are connected to both ends of the voltage source 40a of the test apparatus via the electrical connection terminals 210a and 210d (respective contact portions 232). Further, when K3 is turned ON, one end of the voltage source 40b is connected to the electrical connection terminal 210d. Since the other end of the voltage source 40b is always connected to the electrical connection terminal 210b, 3S and 2S / 2L of the external terminal 24 of the watt hour meter 21 are connected to the electrical connection terminals 210b and 210d (respective contact portions thereof). 231) to both ends of the voltage source 40b of the test apparatus. As a result, a test voltage can be applied to the watt hour meter 22. Therefore, the test power can be supplied to the watt-hour meter 22 by forming these connection states.

Note that K1 to K4 have been described as relays that control ON / OFF of the contacts by flowing current through the coil, but the present invention is not limited to this, and even an electronic device having a switching function such as a transistor may be used. Good. Further, switching of the contacts (K1 to K4) of the circuit 410 may be performed manually or automatically based on the watt-hour meter discriminating information of the watt-hour meter discriminating means 300 described above.

Thereby, according to the kind of watt-hour meter mounted in the board | substrate 110, the electrical connection terminal connected with the external terminal of a watt-hour meter can be switched, and one kind of automatic connection apparatus can be used for a plurality of types of power quantities. A total performance test can be performed. Therefore, the work efficiency can be greatly improved as compared with one type of automatic connection device in which a testable watt-hour meter is used.

If the electrical connection terminal 210 is automatically moved up and down, or switching between the electrical connection terminal 210 in the conduction state and the electrical connection terminal 210 in the non-conduction state in the conduction terminal selection means 400, etc. The control part which receives the information regarding this, the information regarding the kind of installed watt-hour meter, etc., and performs these control based on the received information may be provided separately.

Next, the operation of the automatic connection device 10 according to the first embodiment will be described. First, when the watt hour meter is manually or automatically placed on the substrate 110 of the watt hour meter setting unit 100, the elevating unit 220 according to the test power supply unit 200 is connected by a switch (not shown) or the like that is externally connected. Is driven, and the piston 221 and the electrical connection terminal 210 are lowered (moved in the direction of arrow A in FIGS. 2 and 4). Thereby, when the watt-hour meter 21 is mounted on the substrate 110, the electrical connection terminal 210 having the contact portion 231 (three terminals 210a, 210c, and 210d) and the external terminal 24 of the watt-hour meter 21 (1S, 2S) / 2L, 1L). On the other hand, when the watt-hour meter 22 is mounted on the substrate 110, the electrical connection terminals 210 (5 pieces 210a to 210e) having the contact portion 232 and the external terminals 24 (1S, 3S, 3L) of the watt-hour meter 22 are provided. 2S / 2L, 1L). When the connection between the electrical connection terminal 210 and the external terminal 24 of the watt hour meter is released, the piston 221 and the electrical connection terminal 210 are lifted (moved in the direction opposite to the arrow A) by the drive unit 222. Good.

Next, the watt hour meter discriminating means 300 discriminates the type of the watt hour meter placed on the substrate 110 (either the watt hour meter 21 or the watt hour meter 22). Based on the information on the type of watt hour meter discriminated by the watt hour meter discriminating means 300 (sensor 310), the electrical connection terminal 210 is elected by the conduction terminal selecting means 400 (in this embodiment, the relay circuit 410 shown in FIG. 5). Among them, the electrical connection terminal 210 to be in a conductive state and the electrical connection terminal 210 to be in a non-conductive state are selected. Finally, when the power of the test apparatus is turned on, test power is supplied to the watt-hour meter.

In the above description, after the electrical connection terminal 210 is moved downward, the type of the watt hour meter is determined and the electrical connection terminal 210 to be in the conductive state or the non-conductive state is selected. After the determination of the type of meter and selection of the electrical connection terminal 210 in the conductive state, the electrical connection terminal 210 may be moved downward.

Next, an automatic connection device 60 according to the second embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a perspective view (FIG. 6A) showing the state before and after the watt hour meter 21 to be tested is installed in the automatic connection device 60 according to the second embodiment. FIG. 6B is a diagram before the watt hour meter 21 is installed), and FIG. 7 shows the watt hour meter to be tested in the automatic connection device 60 according to the second embodiment. FIG. 7A is a perspective view before and after the installation of the watt hour meter 22, and FIG. 7B is a view after the watt hour meter 22 is installed. ).

The automatic connection device 60 according to the present embodiment includes a watt-hour installation position adjusting unit 500 that is not provided in the automatic connection device 10 according to the first embodiment. In the present embodiment, the watt hour meter installation position adjusting unit 500 is disposed on the substrate 110 of the watt hour meter installation unit 100.

The watt-hour meter installation position adjusting means 500 adjusts the installation position according to the type of watt-hour meter installed. In the present embodiment, a frame 510 having a groove 511 at the center is used as the watt-hour installation position adjusting means 500. The watt-hour meter to be tested is fitted into the groove 511. In the present embodiment, when only the test of the watt hour meter 21 is performed, the watt hour meter installation position adjusting unit 500 is disposed on the substrate 110, but is not limited thereto.

The width of the groove 511 is molded to be substantially the same as the width of the watt hour meter 21. When the watt hour meter 21 is fitted into the groove portion 511, the side surface of the watt hour meter 21 and the side wall 512 of the groove portion 511 come into contact with each other, and the position of the watt hour meter 21 is fixed. Thereby, when the watt hour meter 21 is installed and when the watt hour meter 22 is installed, the positions of the external terminals 24 in the width direction and the height direction are substantially the same (FIG. 6B). FIG. 7B).

Furthermore, due to the thickness of the back wall 513 of the groove portion 511, the distance from the substrate 110 to the external terminal 24 of the watt hour meter 21 is such that the watt hour meter 21 is placed directly on the substrate 110 (that is, the frame 510 is As compared to the case where the substrate 110 is not provided). Therefore, the position of the external terminal 24 in the depth direction is almost the same between the case where the watt hour meter 21 is installed and the case where the watt hour meter 22 is installed (FIGS. 6B and 7B). reference).

In the first embodiment described above, the position of the contact portion 230 of the electrical connection terminal 210 is changed according to the type of watt-hour meter installed. On the other hand, in this embodiment, by providing the watt-hour meter installation position adjusting means 500, the case where the watt-hour meter 21 is installed and the case where the watt-hour meter 22 is installed are externally located at substantially the same position. Even when the terminal 24 is disposed and the type of watt hour meter installed is different, the contact portion 230 of the electrical connection terminal 210 and the external terminal 24 of the watt hour meter can be brought into contact with each other. Therefore, in the first embodiment, some of the electrical connection terminals 210 are provided with different types of contact portions 230 (231, 232) one by one, but in this embodiment, in all the electrical connection terminals 210, One contact portion 230 may be provided. Thereby, the component of the electrical connection terminal 210 can be simplified and it becomes possible to reduce manufacturing cost. Moreover, since all the area | regions of the contact part 230 contact the external terminal 24, it becomes possible to supply test electric power to a watt-hour meter without loss.

In this embodiment, the watt hour meter 21 (or the watt hour meter) is used as the watt hour meter discriminating means 300 for discriminating the type of the installed watt hour meter by using the distance sensor 320 provided on the side of the substrate 110. A mechanism that measures the distance to the installation position adjusting means 500) or the watt hour meter 22 and determines the type of the watt hour meter based on the difference in the distance is preferable. However, the present invention is not limited to this as long as the type of watt-hour meter can be identified.

In addition, since it is the same as that of the automatic connection apparatus 10 which concerns on 1st embodiment about the other component which is not demonstrated in the automatic connection apparatus 60 which concerns on the above-mentioned 2nd embodiment, it abbreviate | omits.

DESCRIPTION OF SYMBOLS 10 Automatic connection apparatus 21, 22 Wattometer 24 External terminal 40 Voltage source 50 of test apparatus Current source 60 of test apparatus Automatic connection apparatus 100 Wattmeter installation part 110 Substrate 120 Wattmeter locking part 130 Guide part 200 Test power Supply unit 210 Electrical connection terminal 220 Lifting unit 230 Contact unit 300 Wattmeter discriminating means 400 Conducting terminal selection means 410 Relay circuit 500 Wattmeter installation position adjusting means

Claims (3)

A test power that has a watt hour meter installation section for installing a watt hour meter and a plurality of electrical connection terminals that are connected to external terminals provided in the watt hour meter, and is also connected to a test device that supplies test power to the watt hour meter An automatic connection device including a supply unit,
The electrical connection terminal includes a contact portion that contacts an external terminal of the watt-hour meter,
At least one of the electrical connection terminals has a plurality of the contact portions,
A plurality of contact portions provided on one electrical connection terminal are arranged at different positions,
An automatic connection device, wherein a contact portion that contacts an external terminal is switched according to a type of the watt hour meter installed in the watt hour meter installation portion. Watt-hour meter discriminating means for discriminating the type of watt-hour meter installed in the watt-hour meter installation section;
In accordance with the type of watt hour meter determined by the watt hour meter determining means, conductive terminal selecting means for selecting an electrical connection terminal in a conductive state and an electrical connection terminal in a non-conductive state;
The automatic connection device according to claim 1, further comprising: A watt-hour meter installation section for installing a watt-hour meter, and a test apparatus that has a plurality of electrical connection terminals provided with contact portions that come into contact with external terminals provided in the watt-hour meter, and that supplies test power to the watt-hour meter An automatic connection device including a test power supply unit to be connected,
Watt-hour meter installation position adjusting means for adjusting the watt-hour meter installation position;
Watt-hour meter discriminating means for discriminating the type of watt-hour meter installed in the watt-hour meter installation section;
In accordance with the type of watt hour meter determined by the watt hour meter determining means, conductive terminal selecting means for selecting an electrical connection terminal in a conductive state and an electrical connection terminal in a non-conductive state;
An automatic connection device comprising:

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