Connector for electrical meter

Abstract

To provide a connector for an electrical meter with which it is possible to increase the substantial contact area of the terminal of the electrical meter and the contactor of the connector.SOLUTION: A connector 10 for an electrical meter carries out performance test by connecting an electrical mater 50 to a testing device. The connector 10 for the electrical meter comprises: a contactor 20 that terminals 52a, 52d of the electrical meter 50 contact; a pressuring member 31 that presses the terminals 52a, 52d toward the contactor 20; and a sliding mechanism 40 that slides the contactor 20 against the terminals 52a, 52d while the contactor 20 is in contact with the terminals 52a, 52d.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a wiring device for an electric meter that performs a performance test by connecting the electric meter to a test device. [Background technology]

[0002] Conventionally, a performance test is conducted using a test device to check whether a watt-hour meter meets a predetermined standard. When conducting such a performance test, it is necessary to connect the connection wires on the power supply side of the test device to each external terminal of the watt-hour meter for each watt-hour meter to be measured. In this case, the connection wires on the power supply side of the test device and each external terminal of the watt-hour meter are connected to each other via a wire connector provided on a certification test stand, for example.

[0003] In addition, automatic wire connectors that automatically perform the wiring work between a watt-hour meter and a test device have been put to practical use in the past. For example, a wire connector that connects a watt-hour meter having a terminal protruding outward from one side of a housing to a test device is known as such a wire connector (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-11022 A Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, the surface of the terminal of an electric meter may have minute irregularities or an oxide coating due to plating or processing. In addition, the contact of a wire terminator may have irregularities due to aging or the like. For this reason, when the contact of the wire terminator is pressed against the terminal of an electric meter to make contact, the effective contact area between the terminal of the electric meter and the contact of the wire terminator may decrease. In this case, when the contact of the wire terminator is pressed against the terminal of the electric meter to pass a current, excessive heat may be generated between the terminal and the contact.

[0006] The present disclosure provides a wire connector for an electric meter that is capable of increasing the effective contact area between a terminal of the electric meter and a contact of the wire connector. [Means for solving the problem]

[0007] The embodiments of the present disclosure relate to the following [1] to [8].

[0008] [1] An electric meter connection device for performing performance tests by connecting an electric meter to a test device, comprising: a contactor with which a terminal of the electric meter comes into contact; a pressing member that presses the terminal toward the contactor; and a sliding mechanism that slides the contactor against the terminal while the contactor is in contact with the terminal.

[0009] [2] The electric meter wiring device according to [1], wherein the terminal is provided with a screw, and the contact has a screw receiving portion that receives the screw.

[0010] [3] The electric meter wire connector according to [1] or [2], wherein the sliding mechanism causes the contactor to slide relative to the terminal by rotating the contactor a predetermined amount relative to the terminal.

[0011] [4] The electric meter wiring device according to [3], wherein the axis of rotation of the contactor is located inside the outer periphery of the terminal in a plan view.

[0012] [5] The electrical instrument wiring device described in [3] or [4], wherein the contactor has a contactor pin portion, the sliding mechanism has a rotating block having a notch portion and a drive mechanism for moving the rotating block, and the contactor pin portion of the contactor is loosely fitted into the notch portion of the rotating block.

[0013] [6] The electrical instrument wiring device described in [3] or [4], wherein the contactor has a contact notch, the sliding mechanism has a rotation block having a rotation block pin portion, and a drive mechanism for moving the rotation block, and the rotation block pin portion of the rotation block is loosely fitted into the contactor notch of the contactor.

[0014] [7] The electric meter wire connection device according to [1], wherein the sliding mechanism causes the contactor to slide relative to the terminal by linearly moving the contactor relative to the terminal.

[0015] [8] An electric meter connection device for performing performance tests by connecting an electric meter to a test device, the electric meter connection device comprising: a contactor with which a terminal of the electric meter comes into contact; a pressing mechanism for pressing the contactor toward the terminal; and a sliding mechanism for sliding the contactor against the terminal while the contactor is in contact with the terminal. Effect of the Invention

[0016] According to the present disclosure, it is possible to increase the substantial contact area between the terminal of the electric meter and the contact of the wire connection device. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing an entire electric instrument connection device according to a first embodiment. FIG. [Diagram 2] FIG. 2 is a perspective view showing the electric instrument connector according to the first embodiment, with some members removed for convenience. [Diagram 3] FIG. 3 is an enlarged perspective view of the contact. [Figure 4] FIG. 4 is a simplified perspective view of the electric instrument connector according to the first embodiment, in which a pressing member is in a raised position and a sliding mechanism is in a reference position. [Diagram 5] FIG. 5 is a simplified perspective view of the electric instrument connector according to the first embodiment, in which the pressing member is in a lowered position and the sliding mechanism is in a reference position. [Figure 6] FIG. 6 is a simplified perspective view of the electric instrument connector according to the first embodiment, in which a pressing member is in a lowered position and a sliding mechanism is in a sliding position. [Figure 7] FIG. 7 is a schematic cross-sectional view showing a contact state between a contact and a terminal. [Figure 8] FIG. 8 is a perspective view showing a part of an electric instrument connection device according to a first modified example of the first embodiment. [Figure 9] FIG. 9 is a perspective view showing a contact and a sliding mechanism according to a second modified example of the first embodiment. [Figure 10] FIG. 10 is a simplified perspective view of the electric instrument wiring device according to the second embodiment, in which the pressing mechanism is in a lowered position and the sliding mechanism is in a reference position. [Figure 11] FIG. 11 is a simplified perspective view of an electric instrument connector according to a second embodiment, in which a pressing mechanism is in a raised position and a sliding mechanism is in a reference position. [Figure 12] FIG. 12 is a simplified perspective view of the electric instrument wiring device according to the second embodiment, in which the pressing mechanism is in a raised position and the sliding mechanism is in a sliding position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] (First embodiment) A first embodiment will be described below with reference to Figs. 1 to 9. In each of the drawings shown below, the same parts are given the same reference numerals, and some detailed description may be omitted. The numerical values ​​such as dimensions of each member and the names of materials described in this specification are examples of the embodiment, and are not limited thereto, and may be appropriately selected and used. In this specification, terms specifying shapes and geometric conditions, such as parallel, orthogonal, and perpendicular, are intended to include substantially the same state in addition to their strict meanings.

[0019] FIG. 1 is a perspective view showing an entire electric meter connection device 10 according to the present embodiment. An electric meter 50 is attached to the electric meter connection device 10. The electric meter 50 is connected to a test device (not shown) to perform a performance test of the electric meter 50. The electric meter connection device 10 includes a contact 20, a pressing member 31, and a sliding mechanism 40. The contact 20 contacts terminals 52a, 52d of the electric meter 50. The pressing member 31 presses the terminals 52a, 52d of the electric meter 50 toward the contact 20. The sliding mechanism 40 slides the contact 20 relative to the terminals 52a, 52d in a state in which the contact 20 is in contact with the terminals 52a, 52d.

[0020] The electric meter 50 attached to the electric meter wiring device 10 may be a watt-hour meter that integrates and measures electric power. Specifically, the electric meter 50 may be a single-phase two-wire watt-hour meter.

[0021] In this specification, the "X direction" refers to a direction perpendicular to the extension direction of the terminals 52a to 52d within the main plane of the terminals 52a to 52d. The "Y direction" refers to a direction parallel to the extension direction of the terminals 52a to 52d. The "Z direction" refers to a normal direction to the main plane of the terminals 52a to 52d and perpendicular to both the X direction and the Y direction. The "Z direction" may be parallel to the vertical direction.

[0022] The electric meter 50 has a case 51 and four plate-shaped terminals 52a to 52d. The terminals 52a to 52d each protrude outward from one surface 51a of the case 51. The four terminals 52a to 52d are each composed of a 1S terminal 52a, a 2S terminal 52b, a 2L terminal 52c, and a 1L terminal 52d. The four terminals 52a to 52d are arranged side by side in the horizontal direction (X direction). The terminals 52a to 52d each have a screw 53. Specifically, the terminals 52a to 52d each have an opening for the screw 53, and the screw 53 is loosely inserted into each opening. The screw 53 prevents the terminals 52a to 52d from falling off from the terminal when the terminals 52a to 52d are attached to the terminals on the consumer side. The terminals 52a to 52d do not necessarily have to have the screw 53.

[0023] As shown in Fig. 1, an electric meter connector 10 according to this embodiment has a connector body 11 on which an electric meter 50 is attached. A pair of guide parts 12 are attached to the connector body 11. The pair of guide parts 12 guide the side surfaces of the electric meter connector 10 when the electric meter 50 is attached to the electric meter connector 10. A base 15 is fixed to the connector body 11. A first cylinder 42, a second cylinder 36, a guide pin 45, etc., which will be described later, are also fixed to the connector body 11.

[0024] FIG. 2 is a perspective view of the electric meter connector 10, with some members such as the connector body 11 and the guide portion 12 removed for convenience. FIG. 3 is an enlarged perspective view of the contact 20. FIG. 4 is a further simplified perspective view of the electric meter connector 10. In FIGS. 2 and 4, an electric meter 50 is attached to the electric meter connector 10. At this time, the pressing member 31 is in a raised position (non-pressing position), and the pressing member 31 is separated from the terminals 52a, 52d. The sliding mechanism 40 is in a state (reference position) before the contact 20 is slid relative to the terminals 52a, 52d.

[0025] As shown in FIG. 2 and FIG. 3, a pair of contacts 20 are provided, and each of them corresponds to the 1S terminal 52a and the 1L terminal 52d. Each contact 20 is made of a conductive material that is L-shaped in a side view. The contact 20 has an arm 21, an axis forming portion 22, and a contact pin portion 23. The arm 21 is made of a rod-shaped member. The axis forming portion 22 extends downward from the tip of the arm 21. A rotating shaft member 24 that constitutes a rotating shaft when the contact 20 rotates is located below the axis forming portion 22. The rotating shaft member 24 is rotatably held in a base opening 15a provided in the base 15. The contact 20 can rotate around the rotating shaft member 24. The rotating shaft when the contact 20 rotates is located inside the outer periphery of the terminals 52a and 52d in a plan view. This rotating shaft may overlap the screw 53 in a plan view. In this specification, the term "plan view" refers to a state seen from the normal direction of the main surfaces of the terminals 52a, 52d.

[0026] The contact pin portion 23 extends downward from the base end of the arm 21. The contact pin portion 23 is fixed to the arm 21. The contact pin portion 23 is loosely fitted into a cutout portion 43 of a rotation block 41, which will be described later. When the rotation block 41 slides in the X direction, the contact pin portion 23 moves in the X direction, guided by the rotation block 41. This allows the contact 20 to rotate about the rotating shaft member 24 and move from the reference position (FIGS. 4 and 5) to the sliding position (FIG. 6).

[0027] As shown in FIG. 3, the contact 20 has a screw receiving portion 25 at its tip for receiving a screw 53. The screw receiving portion 25 is formed on the upper surface side of the shaft forming portion 22. The tip of the contact 20 has a U-shape in plan view. The screw receiving portion 25 is a recess, but may be an opening. When the electric meter 50 is attached to the electric meter wiring device 10, the screw 53 is received in the screw receiving portion 25 so as not to come into contact with the contact 20. This prevents the screw 53 and the contact 20 from interfering with each other when the contact 20 rotates.

[0028] As shown in Fig. 2, a pair of pressing members 31 are provided. The pair of pressing members 31 correspond to the 1S terminal 52a and the 1L terminal 52d, respectively. Each pressing member 31 is made of an elongated conductive member. The pressing member 31 is located above the contact 20, and rises and falls relative to the contact 20 and the terminals 52a, 52d. The pressing member 31 has a head accommodating recess 37 on its lower surface for accommodating the head of the screw 53.

[0029] The pressing member 31 is supported by a pressing member support block 32. Both ends of the pressing member support block 32 in the X direction are fixed to the upper ends of the shafts 33. The shafts 33 are inserted into linear bushes 34 and can slide up and down (Z direction) in the linear bushes 34. The linear bushes 34 are fixed to the wire splicer body 11 (see FIG. 1). The lower ends of the shafts 33 are fixed to the longitudinal ends of the support bars 35. Furthermore, the support bars 35 are fixed to the rods of the second cylinders 36 (second drive mechanism) at their longitudinal centers. When the rods of the second cylinders 36 are extended and retracted, the support bars 35, the shafts 33, and the pressing member support block 32 rise and fall together. As a result, the pressing member 31 supported by the pressing member support block 32 rises and falls, and can take an elevated position (non-pressing position, see FIG. 4) and a lowered position (pressing position, see FIGS. 5 and 6). When the pressing member 31 is in the raised position, the pressing member 31 is separated from the terminals 52a, 52d. When the pressing member 31 is in the lowered position, the pressing member 31 comes into contact with the terminals 52a, 52d and presses the terminals 52a, 52d against the contacts 20.

[0030] As shown in FIG. 2 to FIG. 4, the sliding mechanism 40 has a rotating block 41 and a first cylinder 42 (first drive mechanism) that moves the rotating block 41. The rotating block 41 is made of a long and thin member extending in the X direction. The rotating block 41 has a pair of notches 43 and a slide guide 44. The contact pins 23 of the contacts 20 are loosely fitted into the pair of notches 43, respectively. Note that through holes may be used instead of the notches 43. The slide guide 44 is made of a groove that penetrates the rotating block 41 in the thickness direction. A guide pin 45 is inserted into the slide guide 44, and the guide pin 45 is fixed to the wire connector body 11 (see FIG. 1). The slide guide 44 and the guide pin 45 regulate the rotating block 41 not to move in the Y direction and the Z direction when the rotating block 41 moves in the X direction. Moreover, by adjusting the length of the slide guide 44 or the amount of movement of the rod of the first cylinder 42, the movement distance of the rotation block 41 in the X direction can be adjusted.

[0031] The rotation block 41 is fixed to a rod of a first cylinder 42 (first drive mechanism). The first cylinder 42 is fixed to the wire connector body 11 (see FIG. 1). The rod of the first cylinder 42 extends and retracts, causing the rotation block 41 to move along the X direction. This causes the contact pin portion 23 of the contact 20 to move in the X direction due to the notch portion 43 of the rotation block 41. This allows the contact 20 to rotate around the rotating shaft member 24 and take a reference position (FIGS. 4 and 5) and a sliding position (FIG. 6). When the contact 20 is in the reference position, the contact 20 extends parallel to the Y direction in a plan view. When the contact 20 is in the sliding position, the contact 20 extends at an angle to the Y direction in a plan view.

[0032] In the present embodiment, the contact 20 is in contact with and slides on the 1S terminal 52a and the 1L terminal 52d through which a large current flows among the terminals 52a to 52d. However, the present invention is not limited to this, and the contact 20 may be in contact with and slides on any one or more of the multiple terminals through which a current flows.

[0033] Next, the operation of this embodiment will be described with reference to FIGS.

[0034] First, as shown in FIG. 4, the electric meter 50 is attached to the electric meter wiring tool 10. At this time, the electric meter 50 is moved along the guide portion 12 (see FIG. 1) in a direction approaching the base 15. As a result, the terminals 52a, 52d of the electric meter 50 are arranged at a position overlapping the contactor 20 in a plan view. At this time, the terminals 52a, 52d do not need to be in contact with the contactor 20. Furthermore, the screws 53 provided on the terminals 52a, 52d are accommodated in the screw accommodating portions 25. In FIG. 4, the pressing member 31 is in a raised position (non-pressing position), and the pressing member 31 is separated from the terminals 52a, 52d. Furthermore, the sliding mechanism 40 is in a state (reference position) before the contactor 20 is slid relative to the terminals 52a, 52d.

[0035] Next, as shown in FIG. 5, the pressing member 31 is lowered to press the terminals 52a, 52d of the electric meter 50 against the contact 20. At this time, the rod of the second cylinder 36 (see FIG. 1) is extended, so that the support bar 35, the shaft 33, and the pressing member support block 32 are lowered together. As a result, the pressing member 31 supported by the pressing member support block 32 is lowered and moves to the lowered position (pressing position). As the pressing member 31 moves to the lowered position, the pressing member 31 comes into contact with the terminals 52a, 52d and presses the terminals 52a, 52d against the contact 20. As a result, the contact 20 comes into contact with the terminals 52a, 52d and is in close contact with them. The head of the screw 53 is accommodated in the head accommodation recess 37 of the pressing member 31, so that the head of the screw 53 does not interfere with the pressing member 31.

[0036] 6, in a state where the contact 20 is in contact with the terminals 52a, 52d, the sliding mechanism 40 slides the contact 20 relative to the terminals 52a, 52d. During this, the rod of the first cylinder 42 is retracted, so that the rotation block 41 moves in the X direction. As a result, the contact pin portion 23 housed in the notch portion 43 of the rotation block 41 moves in the X direction, and the contact 20 rotates a predetermined amount around the rotation shaft member 24. That is, the sliding mechanism 40 moves the contact 20 to a state (sliding position) where the contact 20 slides relative to the terminals 52a, 52d. The amount of rotation of the contact 20 can be adjusted by appropriately adjusting the length of the slide guide 44 or the amount of movement of the rod of the first cylinder 42. The amount of rotation (rotation angle) of the contact 20 may be, for example, 3° or more and 30° or less.

[0037] Thereafter, the electric meter 50 is connected to the power supply side of a test device (not shown) via the electric meter wiring device 10. Thereafter, a performance test of the electric meter 50 is performed by passing a current from the test device to the electric meter 50 via the contactor 20.

[0038] As described above, according to this embodiment, when the contactor 20 is in contact with the terminals 52a and 52d, the contactor 20 moves from the reference position to the sliding position, so that the contact surfaces of the contactor 20 and the terminals 52a and 52d rub against each other. As a result, minute irregularities formed on the contact surfaces of the contactor 20 and the terminals 52a and 52d are scraped off, and the contact surfaces of the contactor 20 and the terminals 52a and 52d come into contact over a substantially wide area. In other words, while the terminals 52a and 52d are pressed against the contactor 20 (applying a vertical force), the contactor 20 is slid against the terminals 52a and 52d (applying a horizontal force). As a result, the surfaces of the terminals 52a and 52d and the contactor 20 are deformed flat to make multipoint contact with each other, and the contact area can be increased.

[0039] Fig. 7(a) is a schematic cross-sectional view showing a contact state between the contactor 20 and the terminals 52a, 52d, and shows a state in which the terminals 52a, 52d are pressed against the contactor 20 (see Fig. 5). As shown in Fig. 7(a), minute irregularities are generated on the contact surface between the contactor 20 and the terminals 52a, 52d due to scratches on the surfaces of the terminals 52a, 52d and aged deformation of the contactor 20. In this case, there is a risk that the substantial contact area between the contactor 20 and the terminals 52a, 52d will be narrowed.

[0040] FIG. 7(b) is a schematic cross-sectional view showing a contact state between the contactor 20 and the terminals 52a, 52d, and shows a state in which the contactor 20 is slid against the terminals 52a, 52d while the terminals 52a, 52d are pressed against the contactor 20 (see FIG. 6). As shown in FIG. 7(b), the contact surfaces of the contactor 20 and the terminals 52a, 52d rub against each other, so that minute irregularities formed on the contact surfaces of the contactor 20 and the terminals 52a, 52d are scraped off, and the substantial contact area between the contactor 20 and the terminals 52a, 52d can be increased. As a result, even if a large current flows between the contactor 20 and the terminals 52a, 52d when a performance test of the electric meter 50 is performed, an increase in electrical resistance between the contact surfaces of the contactor 20 and the terminals 52a, 52d is suppressed. Therefore, excessive heat generation between the contact surfaces of the contactor 20 and the terminals 52a, 52d can be suppressed.

[0041] Furthermore, according to this embodiment, as described above, the contacts 20 and the terminals 52a, 52d are slid in abutting contact with each other, which makes it possible to flatten the contact surfaces and increase the contact area with a weaker force than when the contacts 20 and the terminals 52a, 52d are simply pressed against each other to flatten the contact surfaces.

[0042] Furthermore, according to this embodiment, the screws 53 are provided on the terminals 52a, 52d, and the contactor 20 has the screw accommodating portion 25 that accommodates the screws 53. As a result, even in the case of the terminals 52a, 52d on which the screws 53 are provided, the contactor 20 and the terminals 52a, 52d can be brought into contact with each other, and further, in this state, the contactor 20 can be slid relative to the terminals 52a, 52d.

[0043] Furthermore, according to this embodiment, the sliding mechanism 40 rotates the contacts 20 a predetermined amount relative to the terminals 52a, 52d, thereby causing the contacts 20 to slide relative to the terminals 52a, 52d. This allows the contacts 20 to slide relative to the terminals 52a, 52d while maintaining contact over a wide area between the contacts 20 and the terminals 52a, 52d.

[0044] Furthermore, according to this embodiment, the axis of rotation of the contact 20 is located inside the outer periphery of the terminals 52a, 52d in plan view. This allows the contact 20 to slide a small distance against the terminals 52a, 52d while in contact with the terminals 52a, 52d, making it easy to flatten the contact surfaces of the contact 20 and the terminals 52a, 52d.

[0045] [Example] Next, a specific example of this embodiment will be described.

[0046] First, the electric meter connection tool shown in Figs. 1 to 6 was fabricated. Next, an electric meter was attached to the electric meter connection tool. Next, the pressing member of the electric meter connection tool was lowered, and the terminal of the electric meter was pressed against the contact by the pressing member. At this time, the electrical resistance between the terminal and the contact was measured in mΩ (before sliding [mΩ]). Next, with the contact abutting against the terminal, the contact was slid against the terminal by the sliding mechanism. At this time, the electrical resistance between the terminal and the contact was measured in mΩ (after sliding [mΩ]).

[0047] The above measurements were carried out on the terminals of five different electric meters, and the results are shown below.

[0048] [Table 1]

[0049] In this manner, with the contactor in contact with the terminal, the sliding mechanism is used to slide the contactor relative to the terminal, thereby making it possible to reduce the electrical resistance between the terminal and the contactor.

[0050] (First Modification) Next, a first modified example of this embodiment will be described with reference to Fig. 8. Fig. 8 is a diagram showing a first modified example of this embodiment. The first modified example shown in Fig. 8 is different in that the contact 20 moves linearly instead of rotating, and other aspects are substantially the same as the embodiment shown in Figs. 1 to 7. In Fig. 8, the same parts as those in the embodiment shown in Figs. 1 to 7 are given the same reference numerals and detailed description will be omitted.

[0051] 8, the sliding mechanism 40 linearly moves the contacts 20 relative to the terminals 52a, 52d in a state in which the contacts 20 are in contact with the terminals 52a, 52d, thereby causing the contacts 20 to slide relative to the terminals 52a, 52d.

[0052] In FIG. 8, the sliding mechanism 40 has a linear motion mechanism 48 that moves the base 15 and the contact 20 linearly. The linear motion mechanism 48 may be a slide rail. The linear motion mechanism 48 is fixed to the lower surface of the base 15. The linear motion mechanism 48 serves as a guide when the base 15 moves along the Y direction. The contact 20 is fixed to the upper surface of the base 15. The base 15 may be fixed to a rod of a cylinder (not shown) of the sliding mechanism 40. By extending and retracting the rod of the cylinder, the contact 20 moves in the Y direction together with the base 15. The base 15 and the contact 20 may be linearly moved by a sliding mechanism including, for example, a link slider mechanism.

[0053] In this modification, the sliding mechanism 40 slides the contact 20 relative to the terminals 52a, 52d while the contact 20 is in contact with the terminals 52a, 52d. In this case, the base 15 moves in the Y direction by extending or retracting the rod of the cylinder (not shown). As a result, the base 15 and the contact 20 move in the Y direction by a predetermined distance. The direction in which the contact 20 moves may be a direction in which the contact 20 approaches the case 51 of the electric meter 50, or a direction in which the contact 20 moves away from the case 51 of the electric meter 50. The amount of movement of the contact 20 can be adjusted by appropriately adjusting the amount of movement of the rod of the cylinder. The amount of movement of the contact 20 may be, for example, 0.1 mm or more and 10 mm or less.

[0054] (Second Modification) Next, a second modified example of the present embodiment will be described with reference to Fig. 9. Fig. 9 is a diagram showing the second modified example of the present embodiment. The second modified example shown in Fig. 9 differs in the configurations of the contact 20 and the sliding mechanism 40, and other aspects are substantially the same as the embodiment shown in Figs. 1 to 7. In Fig. 9, the same parts as those in the embodiment shown in Figs. 1 to 7 are given the same reference numerals and detailed description will be omitted.

[0055] As shown in Fig. 9, the contact 20 has an arm 21, a shaft accommodating portion 26, and a contact notch 27. The shaft accommodating portion 26 is a recess formed on the back surface of the arm 21 on the tip side. A base protrusion 15b provided on the base 15 is rotatably accommodated in the shaft accommodating portion 26. The contact 20 is rotatable around the shaft accommodating portion 26. The contact notch 27 is formed on the back surface of the arm 21 on the base end side.

[0056] The rotation block 41 of the sliding mechanism 40 has a rotation block pin portion 49. The rotation block pin portion 49 is loosely fitted into the contact cutout portion 27 of the contactor 20. When the rotation block 41 slides in the X direction, the rotation block pin portion 49 moves in the X direction while being guided by the rotation block 41, and at the same time, the contactor cutout portion 27 of the contactor 20 moves in the X direction. This allows the contactor 20 to rotate about the shaft housing portion 26 as the center and move from the reference position to the sliding position.

[0057] (Second embodiment) Next, a second embodiment will be described with reference to Figs. 10 to 12. Figs. 10 to 12 are diagrams showing the second embodiment. The second embodiment shown in Figs. 10 to 12 differs mainly in the pressing mechanism for pressing the contacts 20 toward the terminals, and other configurations are substantially the same as those of the first embodiment described above. In Figs. 10 to 12, the same parts as those in the first embodiment shown in Figs. 1 to 9 are given the same reference numerals and detailed description will be omitted. Note that in Figs. 10 to 12, the illustrations of some members, such as the wire connector body 11, are omitted.

[0058] 10 to 12, the electric meter wiring device 10 according to this embodiment includes a contact 20, a pressing mechanism 60, and a sliding mechanism 40. The contact 20 contacts the terminals 52a to 52d of the electric meter 50. The pressing mechanism 60 presses the contact 20 toward the terminals 52a to 52d of the electric meter 50. The sliding mechanism 40 slides the contact 20 relative to the terminals 52a to 52d while the contact 20 is in contact with the terminals 52a to 52d.

[0059] In this embodiment, the pressing mechanism 60 has a third cylinder 61 (third drive mechanism) and a support 62. The support 62 is fixed to the rod of the third cylinder 61. The base 15 is fixed to the upper part of the support 62. The contact 20 is supported by the base 15. When the rod of the third cylinder 61 appears and disappears, the support 62, the base 15, and the contact 20 rise and fall together. This causes the contact 20 to rise and fall, and it can take an upper position (pressing position, see Figs. 11 and 12) and a lower position (non-pressing position, see Fig. 10). When the contact 20 is in the upper position, the contact 20 comes into contact with the terminals 52a to 52d and is pressed against the terminals 52a to 52d. When the contact 20 is in the lower position, the contact 20 is separated from the terminals 52a to 52d.

[0060] A receiving block 63 is fixed above the contacts 20. The receiving block 63 is provided with a plurality of receiving portions 64. The receiving portions 64 are located at positions corresponding to the contacts 20. The receiving portions 64 are members that receive pressure from the contacts 20 when the contacts 20 are in the raised position.

[0061] Next, the operation of this embodiment will be described with reference to FIGS.

[0062] First, as shown in Fig. 10, the electric meter 50 is attached to the electric meter wiring device 10. At this time, the electric meter 50 is moved in a direction approaching the base 15. As a result, the terminals 52a to 52d of the electric meter 50 are arranged at positions overlapping the contacts 20 in a plan view. At this time, the terminals 52a to 52d do not need to be in contact with the contacts 20. In Fig. 10, the pressing mechanism 60 is in a lowered position (non-pressing position), and the contacts 20 are separated from the terminals 52a to 52d. Also, the sliding mechanism 40 is in a state (reference position) before the contacts 20 are slid relative to the terminals 52a to 52d.

[0063] 11, the contact 20 is raised by the pressing mechanism 60, and the contact 20 presses the terminals 52a to 52d of the electric meter 50. At this time, the rod of the third cylinder 61 is extended, so that the support body 62 and the base 15 rise together. As a result, the contact 20 supported by the base 15 rises and moves to the raised position (pressing position). As the contact 20 moves to the raised position, the contact 20 comes into contact with the terminals 52a to 52d and is pressed against the terminals 52a to 52d. As a result, the contact 20 comes into contact with the terminals 52a to 52d and is in close contact with them.

[0064] 12, in a state where the contact 20 is in contact with the terminals 52a to 52d, the sliding mechanism 40 slides the contact 20 relative to the terminals 52a to 52d. During this, the rod of the first cylinder 42 is retracted, so that the rotation block 41 moves in the X direction. As a result, the contact pin portion 23 housed in the cutout portion 43 of the rotation block 41 moves in the X direction, and the contact 20 rotates a predetermined amount around the rotating shaft member 24. That is, the sliding mechanism 40 transitions to a state (sliding position) where the contact 20 is slid relative to the terminals 52a to 52d.

[0065] Thereafter, the electric meter 50 is connected to the power supply side of a test device (not shown) via the electric meter wiring device 10. Thereafter, a performance test of the electric meter 50 is performed by passing a current from the test device to the electric meter 50 via the contactor 20.

[0066] According to this embodiment, when the contactor 20 is in contact with the terminals 52a to 52d, the contactor 20 moves from the reference position to the sliding position, so that the contact surfaces of the contactor 20 and the terminals 52a to 52d rub against each other. This causes the surfaces of the terminals 52a to 52d and the contactor 20 to deform flatly to make multiple contacts with each other, thereby increasing the contact area. As a result, even if a large current flows between the contactor 20 and the terminals 52a to 52d, an increase in electrical resistance between the contact surfaces of the contactor 20 and the terminals 52a to 52d is suppressed.

[0067] It is also possible to combine the multiple components disclosed in each of the above embodiments and modifications as necessary. Alternatively, some components may be deleted from all the components shown in each of the above embodiments and modifications. [Explanation of symbols]

[0068] 10 Electrical instrument wiring 20 Contact 21 Arm 22 Shaft forming part 23 Contact pin part 24 Rotating shaft member 25 Screw holder 31 Pressing member 32 Pressing member support block 36 No. 2 cylinder 40 Sliding mechanism 41 Rotation block 42 No. 1 cylinder 43 Notch 44 Slide Guide 45 Guide pin 50 Electrical Meter 52a~52d Terminals 53 Screw 60 Pressing mechanism

Claims

1. In a wiring device for an electric meter for performing a performance test by connecting the electric meter to a test device, A contactor that comes into contact with a terminal of the electric meter; a pressing member for pressing the terminal toward the contact; a sliding mechanism for sliding the contactor relative to the terminal in a state in which the contactor is in contact with the terminal.

2. 2. The electric meter wire connector according to claim 1, wherein the terminal is provided with a screw, and the contact has a screw receiving portion for receiving the screw.

3. 2. The electric meter wire connector according to claim 1, wherein the sliding mechanism rotates the contactor a predetermined amount relative to the terminal, thereby causing the contactor to slide relative to the terminal.

4. 4. The electric instrument connection device according to claim 3, wherein the contacts rotate about an axis of rotation that is located inside an outer periphery of the terminal in a plan view.

5. The contact has a contact pin portion, the sliding mechanism includes a rotation block having a notch and a drive mechanism that moves the rotation block, 4. The electric meter wire connector according to claim 3, wherein the contact pin portion of the contact is loosely fitted in the notch portion of the rotation block.

6. The contact has a contact notch, the sliding mechanism includes a rotation block having a rotation block pin portion and a drive mechanism that moves the rotation block, 4. The electric meter wire connector according to claim 3, wherein the rotation block pin portion of the rotation block is loosely fitted into the contact cutout portion of the contact.

7. 2. The electric meter wire connector according to claim 1, wherein the sliding mechanism causes the contactor to slide relative to the terminal by linearly moving the contactor relative to the terminal.

8. In a wiring device for an electric meter for performing a performance test by connecting the electric meter to a test device, A contactor that comes into contact with a terminal of the electric meter; a pressing mechanism that presses the contact toward the terminal; a sliding mechanism for sliding the contactor relative to the terminal in a state in which the contactor is in contact with the terminal.

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