JPH0850938A - Connection installation for electrical equipment - Google Patents

Abstract

PURPOSE:To make connection and its removal simple. CONSTITUTION:The connection of a cable 2 from a current source 3 is made, and let four plugs 4 which electrically connect the current source 3 to each watt hour meter 1 be carried by an insulating base 6 by pressing the pole section 8 of each plug section 4 against the inner wall of a terminal section 1a for each corresponding watt hour meter 1. Furthermore, let a presser pin 26 capable of pressing each plug 4 be slid by a link mechanism where its sliding motion is actuated by an air cylinder means 312. The pivot shaft hole for the link mechanism is made a slot, a connection reinforcing member 10 composed of a ring shaped spring is fitted in the pole section 8, and the connection of each watt hour meter 1 to the current source 3 is strengthened by elastically touching the terminal section 1a. Only one end of the presser pin 26 is formed out of an insulating member 29. By this constitution, operating performance can be enhanced when connection and its removal are frequently required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire connecting device for testing a large number of electricity meters, breakers and the like, and more particularly to a wire connecting device suitable when the wire connecting portion forms a large current flow path.

[0002]

2. Description of the Related Art Generally, a large number of watt-hour meters are put together and tested in a state where they are connected to one current source.
Fig. 10 shows the wiring condition when 20 units are tested together, Fig. 1
Reference numeral 1 shows the connection state at the terminal of each watt hour meter. In this figure, 101 is an electric power meter, and its terminal portion 101a has a core wire 101b of a cable 102 and a screw 1
01c is connected to connect the 20 electric energy meters 101 to the single current source 103. After connecting in this way, current is passed through all watt-hour meters for testing. As described above, by collectively performing the operation test on a large number of watt hour meters, the efficiency of the test work can be improved.

[0003]

However, in the above-mentioned conventional method, although a large number of units can be collectively tested, the wiring work in the test is performed by each cable 10
It is indispensable to connect 2 to a predetermined terminal portion without fail. Further, the core wire 101b and the terminal portion 101a have poor contact, and heat is generated particularly when a large current is passed, so tighten the screw 101c. It requires a lot of nerves, and the work of loosening the screws and removing the wires is cumbersome, and there is a demand for the appearance of improvement measures.

This is not limited to watt hour meters, but is frequently required for connection and disconnection of a large number of units, especially when handling electrical equipment that carries a large current, for example, in the breaker testing field. Is.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wire connecting device for an electric device, which improves the workability of wire connecting.

Specifically, an object of the present invention is to enable easy connection and disconnection.

Another object of the present invention is to obtain a good contact state between the terminal portion on the electric device side and the plug on the current source side.

[0008]

In a wire connecting device for an electric device according to the present invention, a plug to which a predetermined cable from a power source is connected is inserted into a terminal portion of the electric device so that the plug electrode portion is A plug unit in which a plurality of plugs that form an electrical connection state between the power source and the electric device by contacting an inner wall of the terminal portion are supported by a plug support, and one end of the plug unit can be pressed against the plug. Direction in which the axial position of one end of the plug pressing member is fixed and the axial position of the other end is slidably supported in the longitudinal direction, and one end of the plug pressing member presses the plug by an intermediate portion thereof. And a drive mechanism having a link mechanism having a drive arm for applying a force of a power source to the other end of the plug pressing member.

The plug may include a ring-shaped spring member fitted into the electrode rod and elastically contacting the inner wall of the terminal portion.

The plug pressing member can be made of an insulating material only at one end.

[0011]

According to the present invention, since the current source is connected to the terminal portion of each electric device through the plug, the connection destination of each cable from the current source to each electric device terminal portion is Since it is determined by the plug, it is possible to prevent the wrong connection of the cable and improve the workability of the connection.

Further, according to the present invention, since power is applied to the plug pressing member by the drive arm which is slidable in the longitudinal direction, even if the amount of protrusion of the plug pressing member varies. All of the plug holding members are surely brought into contact with the drive arm, a good contact state between the electrode portion of the plug and the inner wall of the terminal portion of the electric device can be obtained, and heat generation due to poor contact can be suppressed.

Further, according to the principle of leverage, the smaller the distance from the fulcrum of the drive arm to the point of action is, the larger the force acting on the pressing member is. However, according to the present invention, the fulcrum of the drive arm with respect to the plug pressing member is the point of action. The smaller the distance to the plug arm, the larger the angle of the drive arm, and the smaller the component of the force in the plug pressing direction that acts on the plug pressing member is adjusted by sliding the driving arm. The drive arm slide absorbs mechanical errors such as an error in the distance between the plug and the plug and variation in the amount of protrusion at the other end of the plug holding member, and the connection between the terminal on the electrical device side and the terminal on the current source side is connected. A uniform contact state can be obtained in all parts.

Further, according to the present invention, since the ring-shaped spring member is provided in the plug electrode portion, it is possible to form a better contact state by elastically contacting the inner wall of the socket.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a connection state of one lot when the wiring device according to one embodiment of the present invention is used for a test of a watt hour meter. This figure shows a case where 20 electric energy meters 1 are tested in one lot. A current source 3 common to each of the watt hour meters 1-1 to 1-20 by the wiring devices 2-1 to 2-20 according to the present invention functioning as a connector.
Is connected. The connection is made by sliding each watt hour meter 1 in the direction of the arrow as shown in FIG. 2 and inserting the terminal portion 1a into the plug 4 of each wire connection device 2.

FIG. 3 shows the overall construction of each wire connection device, and FIG.
Shows the structure of the plug, FIG. 5 shows the structure of the connection strengthening member used at its tip, and FIG. 6 shows the structure of the plug adapter. First, in FIG. 3, the wiring device 2
Is generally composed of a plug 4, a plug cradle 5, an insulating base 6 and a plug adapter 7. The plug 4 is shown in FIG.
As shown in FIG. 1, one end side thereof is an electrode portion 8, and a tip end portion of the electrode portion 8 is a connecting portion 9 to the electric equipment terminal portion. The connecting reinforcing member 10 is attached to the connecting portion 9. There is. This connection strengthening member 10 is a ring-shaped member, as shown in FIG.
As shown in FIG. 2, base portions 10a and 10b are provided at both ends thereof, and these base portions 10a and 10b are provided with a large number of leaf spring portions 10c and 1c.
They are connected by 0, .... Returning to FIG. 4, the rear end portion of the plug 4 serves as a hollow lead wire connecting portion 11, and the gap between the electrode portion 8 and the lead wire connecting portion 11 serves as a retaining portion 12. Both end portions of the retaining portion 12 are Outward flange part 1
3, 14 are formed.

Plug insertion holes 15 are formed in the pedestal portion of the plug receiving base 5 at three positions. The plug insertion hole 15 has a diameter larger than that of the lead connection portion 11. Adapter positioning pins 16 and 16 are vertically provided at both ends of the front edge of the plug receiving base 5.

The insulating base 6 has two blocks 17, 18
The plug 4 is configured to be inserted and held in a plug holding hole between the blocks 17 and 18. Block 1
A long pin insertion hole 19 is formed at both ends of 7, and an adapter positioning pin 16 is inserted into this pin insertion hole 19.

An adapter positioning hole 20 is formed in each of the plug adapters 7 at both ends thereof.
The plug positioning hole 21 is formed in accordance with the position of the terminal portion of the watt-hour meter to be connected. FIG. 6 shows the state, and the solid line, the alternate long and short dash line, and the alternate long and two short dashes line show the power meter plug positioning holes 21 of different specifications. An adapter positioning pin 19 is inserted through the adapter positioning hole 20, whereby the adapter 7 is fixed. The plug 4 is inserted into the plug positioning hole 21 and thereby positioned with respect to the terminal portion that meets the specifications of the watt-hour meter of each company. The plug positioning hole 21 is composed of a positioning portion 22 and a guide portion 23, and the guide portion 23 has a tapered shape in which the diameter gradually decreases from the plug inlet portion having a larger diameter than the positioning portion 22 to the positioning portion 22. The guide portion 23 of the plug 4 causes the positioning portion 2 to
2. The plug adapter 7 can be easily attached to the insulating base 6 by being guided by 2.

FIGS. 7 and 8 show the construction of the driving means of the wire connection device. In these figures, the drive means is generally composed of an air cylinder, a link mechanism, and a clamp mechanism. Reference numerals 311 and 312 are air cylinder devices thereof, and reference numerals 321 and 322 are output shafts. The air cylinders 311 and 312 are attached to the front surface of the plug receiving base 5 with the shafts 321 and 322 facing rearward. Link mechanism is 331,332,34
~ 37 are provided. The middle part of the arm 331 is pivotally attached to the tip of the output shaft 321 of the air cylinder device 311. 49 is a pivot shaft fixed to the shaft 321, and 40 is a shaft hole. The shaft hole 40 is formed as an elongated hole, and can be slid or rotated in the longitudinal direction by using the pivot shaft 49 as a guide. The arm 332 is attached to the output shaft 322 of the air cylinder device 312 in the same manner as the arm 331. 53 is the pivot shaft and 44 is a shaft hole formed as an elongated hole. One end of the arm 34 is pivotally attached to the plug receiving base 5, 47 is a pivot shaft fixed to the plug receiving base 5, and 38 is a shaft hole. The other end of the arm 34 is pivotally attached to one end of the arm 331. Reference numeral 48 is a pivot shaft fixed to the arm 331, 39 is a shaft hole formed as an elongated hole in the arm 34, and the pivot shaft 48 serves as a guide for the shaft hole 39.
It is slidable and rotatable in the longitudinal direction. Arm 3
One end of 5 is pivotally attached to the other end of arm 331.
Reference numeral 50 is a pivot shaft fixed to the arm 331, and 41 is a shaft hole formed as an elongated hole in the arm 35, which is slidable in the longitudinal direction of the shaft hole 41 using the pivot shaft 50 as a guide. The other end of the arm 35 and the arm 36
One end of is attached to the plug receiving base 5. Reference numeral 51 is a pivot shaft fixed to the plug receiving base 5, and 42 is a shaft hole. The other end of the arm 36 is pivotally attached to one end of the arm 332. 52 is a pivot shaft fixed to the arm 332, 43 is a shaft hole formed as an elongated hole in the arm 36, and the pivot shaft 52 is used as a guide for the shaft hole 43.
It is slidable and rotatable in the longitudinal direction. Arm 3
One end of 7 is pivotally attached to the other end of arm 332.
Reference numeral 54 denotes a pivot shaft fixed to the arm 332, 45 denotes a shaft hole formed as an elongated hole in the arm 37, which is slidable and rotatable in the longitudinal direction of the shaft hole 45 using the pivot shaft 54 as a guide. There is. The other end of the arm 37 is pivotally attached to the plug receiving base 5, 55 is a pivot shaft fixed to the plug receiving base 5, and 46 is a shaft hole. 24, 24, ...
Is a plug holding hole through which each plug 4 of the insulating base block 18 is inserted.
7 is formed with a guide hole 25 corresponding to each plug holding hole 24, one end of which communicates with the plug holding hole 24, and the other end of which opens toward the arms 34 to 37. 26 is slidably inserted. Presser pin 2
One end of 6 protrudes from the other end of the guide hole 25, and the tip ends thereof are in contact with the corresponding arms 34 (35, 36 or 37). The pressing pin 26 is made of metal in order to suppress the wear of the pressing pin 26, and an insulating member 29 is fixed to the other end. The insulating member 29 is made of resin, for example. An outward flange 27 is formed at an intermediate portion of the presser pin 26, and a portion of the guide hole 25 on which the insulating member 29 slides is formed as an inward flange 171 with a reduced diameter as compared with other portions. An elastic coil spring 28 is mounted between the flanges 27 and 171, and the pressing pin 26 is urged by the spring 28 in a direction projecting from the guide hole 25. The urging force of the pressing pin 26 causes the pressing pin 26 to have a tip end portion. But the corresponding arm 34
(35, 36 or 37) is rotationally biased.

FIG. 9 shows a connection state when the above connection device is used. In this figure, 1a is the terminal portion of the watthour meter 1 and 1b is the same recess. The tip of the plug 4 is inserted into the recess 1b. When the air cylinder devices 311 and 312 are operated in that state, the shaft 32
1, 322 move in the direction of the arrow A, that is, project in the direction of arrow A, and the motive power is generated via the arms 331, 332.
Is rotated in the direction of arrow B, and the arms 35 and 37 are rotated in the direction of arrow B ', and the pressing pin 26 is rotated by the arms 34 to 37.
Is moved toward the plug 12 against the spring 28. Then, the insulating member 2 attached to the other end of the presser pin 26
9 is pressed against the flat surface of the plug 12, and the surface opposite to the flat surface is pressed against the inner wall of the plug holding hole 24, the plug 4 is connected to the terminal portion via the connection reinforcing member 10 of the plug electrode portion 8. It is pressed against the inner wall of the recess 1b.

According to this embodiment, the current source 3 is connected to the terminal portion 1a of each watt hour meter 1 via the connection reinforcing member 10 of the plug 4, and the current source 3 is connected by the plug adapter. The plug 4 is positioned to the terminal portion 1a of each watt-hour meter 1 of each cable 2 according to the specifications of each watt-hour meter of each company, and is connected all at once by the air cylinder, so that the workability of connection can be improved. it can.

Further, according to the present embodiment, the arm 3 is capable of applying power to the pressing pin 26 and sliding the pressing pin 26 in its longitudinal direction.
4 to 37, even if there are variations in the protrusion amount of the presser pin 26, all presser pin 26
Reliably contacts the arms 34 to 37, a good contact state between the electrode portion 8 of the plug 4 and the inner wall of the terminal portion 1a of the watt-hour meter 1 can be obtained, and heat generation due to poor contact can be suppressed.

Further, according to the principle of leverage, the arms 34 to 37 are
The smaller the distance from the fulcrum to the point of action on the presser pin 26, the force acting on the presser pin 26 (however, in this case, the force is not limited to the direction in which the presser pin 26 presses the plug 4;
The force acting in the direction perpendicular to 37
The total component of the force generated from the action point of 37) is increased. For example, the operation of pressing the plug 11 against the inner wall of the terminal portion 1a by pressing the holding pin 26 by the arm 34 is completed before the operation of pressing the plug 11 against the inner wall of the terminal portion by the other plug 11 pressed by the arm 35. Even in this case, the arm 331 rotates about the pivot shaft 48. Further, the arm 35 also rotates and the other plug 11 can be pressed against the inner wall of the terminal portion. This is because the holes 39, 40, and 41 are elongated holes, so that the error in the distance between the plug 4 and the tip of the insulating member 29 that constitutes one end of the pressing pin 26, and the protrusion at the other end of the pressing pin 26. Even if there is a mechanical error such as variation in quantity, a reliable contact state can be obtained.

Further, according to this embodiment, since the connection reinforcing member 10 is provided on the electrode portion 8 of the plug 4, the socket 1a thereof is provided.
The elastic contact with the inner wall makes it possible to form a better contact state.

In the embodiment described above, the air cylinder devices 311 and 312 are arranged on the front surface of the plug receiving base 5, but in FIG. 7, they are arranged on the back surface of the plug receiving base 5 as indicated by the one-dot chain line. May be. By doing so, the air cylinder devices 311 and 312 can be excluded from the working space, and the workability can be improved.

[0027]

As described above, according to the present invention, by simply sliding the current source and the electric device, the current source and the electric device can be surely connected to the terminal portion thereof, so that it is possible to prevent the wrong connection of the cable. It is possible to improve the connection workability.

Further, according to the present invention, by applying power to the plug pressing member by the link mechanism and by making the pivot shaft of the arm a long hole, even if the projection amount of the plug pressing member varies. All of the plug holding members are surely brought into contact with the drive arm, a good contact state between the electrode portion of the plug and the inner wall of the terminal portion of the electric device can be obtained, and heat generation due to poor contact can be suppressed.

Further, according to the principle of leverage, the smaller the distance from the fulcrum of the drive arm to the point of action is, the larger the force acting on the pressing member is. Therefore, the object can be achieved with a small air cylinder. Furthermore, according to the present invention, since the ring-shaped spring member is provided in the plug electrode portion, it is possible to form a better contact state by elastically contacting the inner wall of the socket.

[Brief description of drawings]

FIG. 1 is a connection diagram showing a connection state between a power meter and a current source using a connection device according to an embodiment of the present invention.

FIG. 2 is a front view (a) and a side view (b) showing a schematic configuration of a wire connection device according to an embodiment of the present invention together with an electric energy meter.

FIG. 3 is an exploded perspective view showing the configuration of the wire connection device.

FIG. 4 is a front view showing a configuration of a plug of the wire connection device (a).
And an end view (b).

FIG. 5 is a front view (a) and an end view (b) showing the configuration of a connection reinforcing member (multi-ram band) at the tip of the plug electrode rod of the same connection device.

FIG. 6 is a plan view showing a configuration of a plug adapter of the wire connection device.

FIG. 7 is a partial cross-sectional front view showing the configuration of the entire wire connecting device of the present invention including the wire connecting device.

FIG. 8 is a side view of the wire connection device.

FIG. 9 is a cross-sectional view showing a configuration of a connection portion between the terminal portion on the watt-hour meter side and the terminal portion on the current source side by the connection device.

FIG. 10 is a connection diagram showing a connection state between a watt hour meter using a conventional connection method and a current source.

FIG. 11 is a cross-sectional view showing a configuration of a connection portion between a terminal portion on the watt hour meter side and a terminal portion on the current source side by the same connection method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electricity meter 2 Wiring device 3 Current source 4 Plug 5 Plug cradle 6 Insulating base 7 Plug adapter 10 Connection strengthening member 26 Holding pin 29 Insulating member 311, 312 Air cylinder device 331, 332, 34-37 Arm 38-46 Shaft Hole 47-55 Pivot shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kyonobu Watanabe 2-1036 Fujimi, Chiyoda-ku, Tokyo (72) Inventor Yukiko Togashi 3-21-5 Minamimaioka, Totsuka-ku, Yokohama, Kanagawa

Claims (4)

[Claims] 1. A plug to which a predetermined cable from a power source is connected, and an electrode portion of the plug which is inserted into a corresponding terminal portion of an electric device to contact the inner wall of the terminal portion, thereby providing the electric power. A plug unit in which a plurality of plugs forming an electrical connection state between a power source and the electric device are supported by a plug support, a plug pressing member whose one end can be pressed against the plug, and The axial position is fixed, and the axial position of the other end is supported so as to be slidable in the longitudinal direction, and one end of the plug pressing member is attached to the other end of the plug pressing member in the direction of pressing the plug by an intermediate portion thereof. A wire connection device for an electric device, comprising: a drive mechanism including a link mechanism having a drive arm that applies a force of a power source. 2. The wire connecting device for an electric device according to claim 1, wherein the plug includes a ring-shaped spring member that is fitted into the electrode portion and elastically contacts the inner wall of the terminal portion. 3. The wire connecting device for an electric device according to claim 1, wherein the plug pressing member is formed of an insulating material only at one end. 4. A plug adapter that corresponds to a position of a hole of a terminal portion of the electric device is provided.
Wiring device for the electric equipment described.