JP2002164094A - Attachable/detachable terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachable/detachable terminal device allowing connecting or removing of an electric wire in a short time by attaching/ detaching, which sufficiently ensuring current capacity connecting of the electric wire without using a jig such as a screwdriver, and causing no connection error of the electric wire. SOLUTION: This attachable/detachable terminal device is formed in such a way that a conductive guide rod 12 (13) is installed so as to project from each terminal position previously set of a conductive substrate 11 having at least two terminals; an intermediate moving body 15 (16) is installed by integratedly stacking a coil spring 14, a magnetic plate 17 and a conductive plate 19 for engagement with the conductive guide rod 12 (13); an outer terminal piece 30 containing a magnetic body is fit to the conductive guide rod 12 (13) and pushed in through an amplifier terminal 36 connected to a wiring so as to contract the coil spring 14 with the outer terminal piece 30; and the outer terminal piece 30 is fixed at the electrical connection position between the amplifier terminal 36 and the conductive substrate 11 to a housing with an attachable/detachable hook 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable terminal device which facilitates connection and removal of a connection terminal provided with a conductive contact portion at the end of an external lead wire.

[0002]

2. Description of the Related Art As shown in FIG. 18, electric power generated at a power plant 61 is transmitted to a substation 63 at a remote location via a power transmission line 62, and is transformed into a consumption voltage at the substation 63 so as to be consumed by each consumer. Power. A large number of power control housings 64 are arranged in the substation 63 as shown in FIG. 19, and monitor and control the power transmission state. That is, meters 65 for monitoring the power transmission state are arranged in the upper part of the housing 64. In the middle part, a number of relay switchboards 66 to which input lines and output lines of wiring for controlling and monitoring the power transmission state are connected are arranged. In the lower part, a large number of switches (interrupters) 67 for the control system are arranged.
Four switches 68 are provided. The substation 63 constantly monitors the power transmission state, detects an accident such as a lightning strike or a short circuit, and controls the circuit breaker to disconnect the circuit. Wiring for performing such control is also performed via the relay switchboard 66.

[0003] As shown in FIG.
A row of a large number of terminal blocks 72 is accommodated in one plastic container 71, and each terminal block 72 transfers electric signals between the outside of the switchboard and the inside of the switchboard as shown in FIG. The wiring work of the cable to the switchboard 66 is performed by connecting a ring-shaped conductor amplifier terminal, which is attached to the end of the electric wire of each wiring circuit by means of caulking or the like based on a wiring diagram, to each terminal block using a screwdriver. 72 was connected by a screw 73.

[0004]

However, in the above-mentioned wiring work, for all the wirings, the method of screwing is such that the male screw 73 of the terminal block 72 at the connecting point is once removed with a screwdriver, and the removed male screw is removed. Pass the screw through the hole in the amplifier terminal and again use the screwdriver to insert the male screw 73 into the terminal block 7
It had to go through man-hours such as tightening to 2. As described above, the wiring connection work to the terminal block 72 by screwing in the manufacture, remodeling, testing, cable construction, etc. of the switchboard requires a screwdriver, tightens the screw 73 for each cable connection, and removes the screw 73. A lot of time was spent to perform such operations. In addition, this operation can cause the screws to fall,
There was a problem of crushing the screw thread. Further, in the case of modifying the distribution board 66, it is necessary to carefully cure the terminal block 72 with vinyl tape or the like for insulation.

SUMMARY OF THE INVENTION It is an object of the present invention to connect a wire having a sufficient current capacity by simply pushing it in without screwing the connection of the wire to a terminal block, to remove the wire in a short time, and to use a tool such as a screwdriver. An object of the present invention is to provide a detachable terminal block in which no electric wire connection and individual terminal blocks are independently sealed with an insulating material and have high insulation properties and no electric wire connection error occurs.

[0006]

In order to achieve the above object, a detachable terminal device according to the present invention comprises a contact terminal provided with a conductive contact portion at the end of an external lead wire, wherein the surface of the conductive contact portion is provided. A first conductive member having an accommodating portion for accommodating the first conductive member, a second conductive member arranged to face the first conductive member, and a conductive member between the first and second conductive members. The first and the second so as to maintain the contact state.
A locking member for connecting the conductive members, and an elastic member for forcibly releasing a conductive contact state between the first and second conductive members with release of the locked state of the locking member. Characteristic detachable terminal device.

[0007] The conductive contact portion provided at the tip of the external lead wire is formed in an annular shape.

The second conductive member has a conductive rod, and the conductive rod penetrates the annular conductive contact to form an electrical connection between them. .

[0009] The elastic member is a coil spring inserted into the conductive rod.

In the detachable terminal device of the present invention, a movable portion receiving port is formed on the front surface, a claw hook is formed on a side surface, and a conductive rod is provided on a conductive substrate behind the movable portion receiving port. A terminal block fixing portion, in which a connecting metal protruding and having a movable conductive plate having a through hole for the conductive bar inserted through the conductive bar through a coil spring is inserted, and a movable portion receiving the terminal block fixing portion; The terminal is formed so as to be insertable into the opening, and the side surface can be engaged with the hook portion of the fixed terminal block by being inserted into the movable portion receiving port of the terminal block fixing portion against the elastic force of the coil spring. A locking claw portion is extended, and a lead wire insertion hole is formed at the base of the locking claw portion. The fixed terminal block is movable on a front surface provided at a position retracted from the lead wire insertion hole. The fixed conductive plate having a hole portion into which the conductive rod can be loosely inserted when inserted into the part receiving port is And a lead wire having an amplifier terminal having a hole that can be inserted from the lead wire insertion hole of the terminal block fixing portion and that can be loosely fitted to the conductive rod of the fixed terminal block. And inserting the amplifier terminal of the lead wire from the lead wire insertion hole of the terminal block movable portion, and holding the hole portion of the amplifier terminal at a position where the conductive rod passes, while holding the terminal block movable portion. The amplifier terminal is inserted into the movable portion receiving opening of the fixed terminal block against the elastic force of the coil spring, and the locking claw portion of the terminal block movable portion is engaged with the claw hook portion of the fixed terminal block. Is pressed between the movable conductive plate and the fixed conductive plate.

In order to improve the electrical connection between the amplifier terminal and the conductive substrate, the detachable terminal device according to the present invention is configured to fix the movable conductive plate of the terminal block fixing portion and the terminal block movable portion. The back surface and / or the side surfaces of each of the conductive plates are provided with a magnet and a magnetic body that are magnetically attracted to each other.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a detachable terminal device according to the present invention will be described with reference to FIGS. An embodiment applied to a detachable terminal block for a distribution board in a substation will be described. A transformer protection circuit, a line protection circuit, a bus protection circuit, a short circuit accident protection circuit due to lightning and snow, a monitoring circuit, a transmission power control circuit, and the like are wired to the detachable terminal block. The voltage handled by these circuits is, for example, 400 V, and the current is about 3 A for DC, and about several mA for AC.

Embodiment 1 FIG. 1 shows the structure of a switchboard incorporating a large number of detachable terminal blocks.
This will be described with reference to FIG. FIG. 1 is a perspective view of a switchboard.
In this switchboard, a plurality of detachable terminal blocks 47 are vertically stacked and integrally formed. For example, 350
mm × 750 mm. Each detachable terminal block 47 is shown in FIG.
The housing 8 includes a fixed housing 8 and an external terminal piece 30 which is detachably pushed into the housing 8 to make electrical connection. The former case 8 has an upper lid 1 and a lower lid 2, and has a rail 4 which is a guide for the external terminal strip 30 on a surface facing the upper lid 1 and the lower lid 2. The latter external terminal piece 30 has a groove 42 that fits into the rail 4 and a hook 44 that engages with a stop hole 6 provided in the side wall 5 of the housing 8 at a position pressed into the housing 8. . This hook 44
Allows the external terminal piece 30 to be removably incorporated. Reference numeral 3 denotes a wall plate provided at the center between the upper lid 1 and the lower lid 2 and having a function as a guide wall for two external terminal pieces 30. 3
Reference numeral 8 denotes a through hole into which the conductive guide rod is inserted. 43 is
It is an insertion hole for inserting an amplifier terminal. Thus, the detachable terminal block 47 is configured.

Next, the structure and electrical connection of the detachable terminal block 8 shown in FIG. 2 will be described with reference to FIGS. FIG.
FIG. 5 is a partially cutaway sectional view for explaining a state before the external terminal piece 30 is pushed in. FIG. 4 is a partially cutaway sectional view for explaining an electrical connection state in which the external terminal piece 30 is pushed. The configuration will be described with reference to FIG. A conductive substrate 11 is fixed to the inner rear plate 7 of the housing 8. A conductive guide rod 12 is implanted on the conductive substrate 11. A spring storage space (groove) 51 is formed annularly in the conductive substrate 11 at the base of the guide rod 12. A spring 14 and an intermediate moving body 15 are sequentially fitted to the guide rod 12. A stop hole 6 is provided in the side wall 5 of the housing 8.
The partition plate 3 is provided at the center of the housing 8. In the intermediate moving body 15, reference numeral 17 denotes an iron plate as a magnetic body, and reference numeral 19 denotes a copper plate for obtaining electrical connection.

An external terminal strip 30 is provided so as to be fitted to the guide rod 12. That is, the external terminal piece 30 has a through hole 21 into which the guide rod 12 can be inserted.
38 are provided. In the external terminal piece 30, 34
Is a terminal plate for obtaining electrical connection, 43 is an amplifier terminal insertion hole, 44 is a hook for temporarily fixing the external terminal piece 30 to the housing 8, 45 is a protrusion, and 46 is a magnetically attracted connection with the iron plate 17. Are permanent magnets. An annular groove 37 for rough positioning of the amplifier terminal 36 connected to the electric wire (wiring) 49 is formed in the terminal plate 34 of the external terminal strip 30. Thus, the detachable terminal block 47 is configured. The configuration of the amplifier terminal 36 is such that a circular hole 36b through which the guide rod 12 penetrates is formed in an annular copper plate 36a and an electric wire 49 is connected, as shown in FIG.

Next, a procedure for wiring the amplifier terminals 36 by the detachable terminal block 47 will be described. First, a state before the external terminal piece 30 is pushed in will be described with reference to FIG. The operator inserts the amplifier terminal 36 of a predetermined wiring from the amplifier terminal insertion hole 43 and roughly positions the through hole 38 of the terminal plate 34 with the annular groove 37 shown in FIG. FIG. 6 is a plan view of the external terminal strip 30 on the terminal plate 34 side. 32 is a guide part, 41 and 42 are guide grooves. In this way, with the amplifier terminal 36 set, the guide grooves 41 and 42 of the external terminal piece 30 are aligned with the rail 4 of the movable portion receiving opening of the housing 8, and the external terminal piece 30 is slid along the rail 4 and pushed in. . In this sliding process, the through-hole of the amplifier terminal 36 and the through-hole 38 of the external terminal strip 30 are aligned with and fitted to the protruding conductive guide rod 12, and the external terminal strip 30 is slid while the rail 4 is slid. Insert This inserted state is shown in FIG.

In this sliding process, the external terminal piece 30 is slid along the rail 4, and the intermediate moving body 15 is inserted and pressed against the conductive substrate 11 against the elastic force of the spring 14. As a result, the spring 14 contracts, and the surface of the intermediate moving body 19 facing the iron plate 17 comes into firm contact with the exposed surface of the conductive substrate 11 and stops. The conductive substrate 11 and the iron plate 17
In order to make the opposing surfaces firmly contact each other, when the spring 14 contracts to the shortest, a storage space 51 for storing the spring 14 is required in this embodiment. Note that the storage space 51 may be provided on the facing surface of the iron plate 17. The amplifier terminal 36
It is pinched between the copper plate 19 and the terminal plate 34. In FIG. 4, an amplifier terminal 36 for wiring and the conductive substrate 11 are electrically connected via the copper plate 19, the coated copper wall 50, the conductive guide rod 12, and the terminal plate 34.

In order to maintain the electrical connection state, the projection 45 of the hook 44, which is a locking claw, is inserted into the stop hole 6 of the housing 8 and is removably fixed (temporarily fixed). The contact force between the amplifier terminal 36 and the terminal plate 34 and the copper plate 19 is determined by the fixing means of the external terminal piece 30, the pressing force of the coil spring 14, and the magnetic attraction (magnetic attraction) of the permanent magnet 46 and the iron plate 17. It is determined. The spring 14 is a spring in an expanded state without pressure. The electrical connection is made by contracting the spring, and when the amplifier terminal 36 is re-wired, the external terminal piece 30 or the amplifier terminal 36 It pushes out. Further, when the contact is fixed by the fixing means, the contact may be loosened somewhat, but in order to prevent the electric connection state from changing over time, in this embodiment, the pressing force by the spring 14 and the permanent magnet 46 are used. Further, the electrical connection state is continuously maintained by utilizing the magnetic attraction force (magnetic attraction force) of the iron plate 17.

When changing the wiring (or eliminating the wiring), the electrical connection state can be released by pulling out the projection 45 of the hook 44 from the stop hole 6 (electric wire lift). By the operation of releasing the projection 45, the contracted spring 14 expands to the state shown in FIG. In this state, the external terminal strip 30 is held on the rail 4 by an operator's finger.
Can be pulled out from the conductive guide rod 12 while sliding. By extracting the amplifier terminal 36 engaged with the external terminal piece 30 extracted from the conductive guide rod 12 (13) from the amplifier terminal insertion hole 43, it can be replaced with another amplifier terminal 36. A new wiring amplifier terminal 36 is inserted from the amplifier terminal insertion hole 43 of the external terminal piece 30 and the external terminal piece 30 is inserted toward the conductive guide rod 12 in the above-described procedure, thereby making contact and replacement of the wiring. be able to.

As described above, the amplifier terminal 36 can be wired by a one-touch operation simply by pushing the external terminal piece 30, and the amplifier terminal 36 can be removed and replaced with another wiring simply by removing the fixing means. This is a possible configuration. Further, the electric wire connection at the terminal block 47 is performed by the external terminal strip 3.
It can be completed only by attaching and detaching 0, eliminating the need to remove the screw of the terminal block using a screwdriver and tightening the screw, so that the wire connection work time that secured sufficient current capacity at the terminal block can be shortened There is. In addition, since the outer surface of each external terminal piece 30 is a box 35 formed of an insulating material, the short circuit of the charging circuit at the terminal block 47, the ground fault, and the prevention of the electric shock of the operator can be prevented during the operation. is there. The individual conductive substrates 11 are independently provided on the housing 8 made of an insulating material, so that the detachable terminal block 8 having high insulation properties can be configured.

Next, each component of the detachable terminal block 8 will be described. First, the configuration of the housing 8 will be described with reference to FIGS. FIG. 7 is a perspective view for explaining the configuration of the housing of FIG. An upper lid 1 and a lower lid 2 are provided so as to face the upper and lower surfaces, and a partition plate 3 is provided at a central portion between the upper and lower lids 1 and 2 so as to partition between two terminals. The partition plate 3 supports the upper lid and the lower lid and has a function as a guide for the external terminal pieces 30. Further, projecting rails 4 are provided on the left and right side edges between the peripheral edge facing surfaces of the upper and lower lids 1 and 2, respectively. The rail 4 is for coupling with a guide groove of the external terminal piece 30 described later (the rail and the guide groove mounting member may be reversed).

That is, a pair of rails 4 are formed on the upper and lower lids for one external terminal piece 30. A side wall 5 for strengthening the container as a terminal block 47 is provided at the end of each of the rails 4 on the periphery of the upper and lower lids 1 and 2 at the end thereof. One or a plurality of stop holes 6 for temporarily fixing the electrical connection positions of the terminal pieces 30 are formed. In this embodiment, one stop hole 6 is provided. A back plate 7 is integrally provided between the upper and lower lids 1 and 2 on the rear side of the space formed by the upper and lower lids 1 and 2 to form a housing 8. This housing 8
For all the components constituting the above, an insulating material such as a heat-resistant plastic is optimal. In the case of large power, this can sufficiently cope with a temperature rise due to heat generated by the flow of current.

Next, an electrical connection mechanism incorporated in the housing 8 will be described with reference to FIG. FIG. 8 shows the housing 8 of FIG.
It is a perspective view which expands and shows the structure of the electrical connection mechanism incorporated in it. A rectangular conductive substrate 11 made of a copper plate shown in FIG. 8 is incorporated in the housing 8 and fixed to the rear plate 7 of the housing 8. This fixing means may be screwed or fitted. At a predetermined terminal position of the conductive substrate 11,
A plurality of, for example, two left and right copper guide rods 12, 13 are fixedly provided integrally. The fixing means is a conductive substrate 1
It may be formed integrally from one, or may be joined separately. The conductive substrate 11 provided with such conductive guide rods 12 and 13 protruding is incorporated in the housing 8.

The conductive guide rods 12 and 13 of the conductive board 11 incorporated in this manner are fitted with coil springs 14 which are extended when there is no pressure. Each of the conductive guide rods 12,
13. Each such conductive guide rod 1
In order to facilitate the work of fitting the conductive guide rods 2 and 13, it is desirable that the tips of the conductive guide rods 12 and 13 be processed into a conical shape as shown in FIG. Further, as shown in FIG. 8C, it may be processed into a slightly sharpened conical shape. By making the tip of the conductive guide rod 12 (13) round, it becomes difficult for the conductive guide rod 12 (13) to be caught by the edge of the hole when it is inserted into the hole of the amplifier terminal 36 as shown in FIG.
Since the connection of the housing 2 and the housing 8 to the rail 4 can be performed smoothly, there is an effect that the wire connection work time can be reduced.

The spring 14 is provided with intermediate moving bodies 15, 16-
A desired electrical contact force between the amplifier terminal 36 and the external terminal piece 30 is obtained, and the external terminal piece 30 is released when the hook 44 is released.
It works to drive out the front. The intermediate moving bodies 15 and 16 are configured as follows. An electrically good conductor such as a square copper plate 19 or 20 is integrally attached as a movable conductive plate to a magnetic body such as a square iron plate 17 or 18. The iron plates 17 and 18 and the copper plates 19 and 20
Are concentrically integrated in the same shape. The means for integrating may be bonded by an adhesive or screwed. Providing the iron plates 17 and 18 is equivalent to the amplifier terminal 3
Reference numeral 6 denotes that the conductive substrate 11 is magnetically attracted (attracted) between the conductive substrate 11 and the permanent magnet 46 so as to obtain a good electrical contact pressure. Therefore, a suction force that satisfies this purpose is required.

Further, the integrated iron plates 17, 18
And the conductive guide rod 1 at the center of the copper plates 19 and 20.
Intermediate moving bodies 15 and 16 are formed by penetrating through holes 21 and 22 through which 2 and 13 penetrate. The through hole 21,
The diameter of 22 is effective in terms of electrical connection because it slides and fits with the conductive guide rods 12 and 13. In order to make this good electrical connection, the conductive guide rods 12, 13 and the copper plate 1 are required.
The purpose is to increase the area of electrical contact with 9 and 20.
To increase the electrical contact area, copper plates 19, 20
Is processed so as to cover the inner wall surfaces of the through holes 21 and 22 of the iron plates 17 and 18 in the through holes 21 and 22,
0 is formed. This intermediate moving body 1
FIG. 8 is a side view for understanding the state in which 5, 5 are inserted.
(D).

Next, a description will be given of a state in which the electric connection mechanism configured as described above is incorporated in the housing 8 with reference to FIG. FIG. 9 is a perspective view showing a state where the electrical connection mechanism is incorporated in the housing 8 of FIG. FIG. 9 shows a state of a terminal fixing portion in which the conductive substrate 11 and the intermediate moving bodies 15 and 16 of FIG. 6 are incorporated in the housing 8 of FIG. Intermediate moving bodies 15, 16
Is provided at an intermediate portion in the housing 8. Next, the configuration of the terminal block movable portion, for example, the external terminal piece 30 will be described with reference to FIGS. FIG. 10 is a perspective view of the external terminal piece 30. FIG. 11 is a front view of the external terminal piece 30 of FIG.
FIG. 12 is a top view of the external terminal piece 30 of FIG. The external terminal piece 30 has a terminal portion 31 having the same size and outer shape as the outer shape of the intermediate moving bodies 15 and 16, and a rail provided on the side edge of the upper and lower lids 1 and 2 of the housing 8. 4 comprises a guide part 32 having a structure conforming to No. 4, and a magnet part 33 for magnetically attracting the iron plates 17 and 18.

The external terminal strip 30 enables electrical contact with the amplifier terminal 36 irrespective of the magnitude of the current capacity, and can be removably wired without requiring screws or the like when wiring or changing wiring. It is a structure aimed at. The terminal portion 31 is formed of a thick rectangular terminal plate 34 made of an electrically conductive material such as a copper plate. A rectangular box 35 made of plastic is provided integrally with the terminal plate 34. An annular groove 37 for installing an amplifier terminal 36 shown in FIG. 6 may be provided on the contact surface of the terminal plate 34 with the copper plates 19 and 20 as necessary. The annular groove 37 is used for roughly positioning and supporting the external terminal strip 30 on the terminal plate 34. The depth of the groove 37 is shallower than the thickness of the amplifier terminal 36, and is a depth at which the surface of the amplifier terminal 36 protrudes from the terminal plate 34. A through-hole 38 into which the conductive guide rods 12 and 13 are loosely fitted is formed in the center of the box 35 and the terminal plate 34 of the external terminal piece 30.

Further, the guide portion 32 is provided integrally on the side surface of the box 35. The guide portion 32 has a structure that can be integrally processed when the box 35 is formed of a synthetic resin. That is, guide grooves 41 and 42 that engage with the rail 4 are provided on the upper and lower surfaces. An insertion hole 43 for inserting the amplifier terminal 36 is formed in a side wall surface of the guide portion 32.

The position of the insertion hole 43 is
And the inserted amplifier terminal 36 is provided so as to be located on the surface of the terminal plate 34 as shown in FIG. The insertion depth of the amplifier terminal 36 is determined according to the annular groove 37 or the through hole 38 provided in the terminal plate 34. As shown in FIG. 10 (A), the guide portion 32 further includes a detachable fixing means for fixing the external terminal piece 30 to the housing 8 at an electrical connection position between the amplifier terminal 36 and the conductive substrate 11. A hook 44 is provided. The hook 44 is an elastic plate-like body having a projection 45 formed at the tip.

The hook 44 is preferably made of a hard plastic that can be removed by bending. Protrusion 4
Reference numeral 5 denotes a configuration that is inserted into and fixed to a stop hole 6 provided in the side wall surface 5 of the housing 8. The release of the fixing is to pull out the projection 45 from the stop hole 6. As means for facilitating the extraction, a finger hook 52 may be provided at the tip of the hook 44 as shown in FIG. The magnet section 33 is provided with a permanent magnet 46 provided in the box 35 and fixedly incorporated therein. When the size of the permanent magnet 46 is substantially equal to the inner volume of the box 35,
A through hole 38 through which 2 and 13 penetrate is formed to penetrate the permanent magnet 46 as well. The external terminal strip 30 having such a configuration is inserted and assembled from the movable portion receiving port of the housing 8 shown in FIG. 9 to form a detachable terminal block 47 as shown in FIG. A state in which the detachable terminal blocks 47 are stacked and assembled is a switchboard 48 in FIG. The detachable fixing means is
Other locking structure of the hook, for example, a fixing structure with a button may be used.

As described above, the detachable terminal block is provided with at least two of the conductive substrates 11 fixed in the insulating casing 8.
Guide rods 12, 13 protruding from three terminal positions
The intermediate moving bodies 15 and 16 having the springs 14 and the magnet portions 33 in a non-pressurized and expanded state are fitted to the amplifiers 36 and the amplifier terminals 36 connected to the wiring of the electric circuit are supported by the intermediate moving bodies 15 and 16. Then, by fitting the external terminal piece 30 containing the magnet part 33 to the guide rods 12 and 13 and pushing it into the housing 8, the amplifier terminal 36 and the conductive substrate 11 are connected by the magnetic attraction action and the spring 14. This is a configuration for continuous electrical connection.

The conductive guide rod 12 (13) and the copper plate 19 (2)
0) If the electrical connection state of the amplifier terminal 36, the terminal plate 34 as an external terminal piece, and the like, that is, the electrical contact area can be obtained to a predetermined value, the magnetic attraction (adsorption) function may not be required.

Embodiment 2 Another embodiment for making an electrical connection between the amplifier terminal 36 and the conductive substrate 11 will be described with reference to FIGS. Parts common to the drawings of the first embodiment will be described with reference to the drawings of the first embodiment. This embodiment is a case where a plurality of stop holes 6 are formed. In FIG. 3, the storage space for the spring 14 may not be provided. The connection state in this case is as shown in FIG. That is, the electrical connection between the amplifier terminal 36 and the conductive substrate 11 is an electrical connection via the conductive guide rod 12 (13). In FIG. 13, the conductive guide rod 12 (1
Means for ensuring an electrical contact area between 3) and the copper plate 19 (20), the iron plate 17 (18), the amplifier terminal 36, the terminal plate 34 as an external terminal piece, and the like are as follows. Copper plate 19
(20) is the iron plate 17 in the through hole 21 (22).
(18) The coated copper wall 50 is formed by processing so as to cover the inner wall surface of the through hole 21 (22).

Further, the area of electrical contact between the coated copper wall 50 and the conductive guide rods 12 (13) satisfies the current capacity of the wiring circuit. In order to satisfy this condition, a sliding relationship is required between the coated copper wall 50 and the conductive guide rod 12 (13).

The fitting of the intermediate moving body 15 (16) by the sliding requires a large working force when the external terminal piece 30 is pushed in during the wiring work. Workability is somewhat affected. In particular, when the hooks 44 are released at the time of wiring replacement work, the spring 14 has a resilient effect on the protrusion of the external terminal pieces 30, so that the spring 14 needs to have a high elastic modulus. In addition, if the structure is loosely fitted, a non-contact portion may partially occur, the current capacity is insufficient, and the portion may be heated and burnt.

Further, the amplifier terminal 36 is in surface contact with the copper plate 19 and the terminal plate 34, and the contact force of these is continuous by the contact force of the fixing means of the external terminal piece 30 and further by the pressing force of the elasticity of the spring 14. Can be secured. FIG.
Indicates that normal electrical connection between the amplifier terminal 36 and the conductive substrate 11 is obtained when the contraction of the spring 14 is intermediate. In the switchboard 78 constructed by stacking the detachable terminal blocks 47 configured as above, the projections 45 of the external terminal pieces 30 are hooked to the outside of the holes 6 as shown in FIG. It contracts by the length of the interval between the holes 6. The conductive guide rod 12 (1
In 3), the conductive guide rods 12 (13) protrude as shown in FIG.

As described above, the hook 4 of the detachable terminal block 47
When the position of 4 is changed and the measurement of the electric signal and the input of the signal for measurement are performed on the terminal block 47 in the test of the switchboard 48 or the like, the alligator clip wire is attached to the protruding conductive guide rod 12 (13). Can be easily connected, which has the effect of shortening the test time. After the exam is over,
Since the conductive guide rod 12 (13) to which the voltage is applied is in a protruding state, which may cause an electric shock or a short circuit accident, which is dangerous, the projection 45 of the external terminal piece 30 is returned to the original position inside the hole 6. To use. As described above, a plurality of positions for fixing the external terminal pieces 30 are provided on the terminal block 47 at predetermined intervals, and by selecting the fixing positions of the external terminal pieces 30, the conductive guide rods 12 (13) are connected to the external terminal pieces 30. It can be fixed by protruding from the surface. This fixation can be tested by clipping on the clip-like terminals of the tester.

Embodiment 3 In the switchboard 48, the electrical contents handled for each terminal block 47 are different. For example, the contents of the voltage, current, control signal, and the like are different. Preventing erroneous insertion of various amplifier terminals 36 according to this difference is practically useful when a large amount of wiring work is performed. This embodiment will be described next. The common parts with the drawing of Embodiment 1 of the detachable terminal block are as follows.
A description will be given with reference to the drawings of the first embodiment. Same relay conductive plate 1
The external terminal strips 30 in 1 have the same structure, and have different contents electrically between different conductive substrates 11, so that a structure for preventing erroneous insertion (erroneous wiring) is adopted.

Means 1 The cross-sectional shape of the guide grooves 41 and 42 provided on the external terminal strip 30 and the rail 4 provided on the housing 8 (terminal block 47) differs for each desired type, for example, for each terminal block 47. Form into shape. The structure is such that the cross-sectional shape of the rail 4 that engages with the changed guide grooves 41 and 42 also matches.

Means 2 The terminal block 47 can be distinguished by changing the installation position of the rail 4 (the distance between the wall plate 3 and the rail 4). Only the external terminal strip 30 suitable for the terminal block 47 can be connected.

Means 3 Upper and lower guide grooves 41, 42 provided on the external terminal piece 30.
FIG. 15 shows a case in which the depth of the pattern is changed. FIG. 15 is a front view for explaining another embodiment of FIG. This FIG.
Are the external terminal pieces 30 in which the depths of the guide grooves 41 and 42 are changed.
Is indicated by a dotted line, and indicates that the terminal block 47 can be specified and designated by changing the height of the rail 4 so as to couple in response to this change. The pushing of the external terminal piece is such that a guide groove is provided in the external terminal piece, and the rail is slid by coupling the guide groove with a rail provided on the terminal block. The connection shape is made different for each terminal block, so that only suitable external terminal pieces can be pushed into the terminal block and wired.

Means 4 The hook 74 can be specified by changing the length as shown by the dotted line in FIG. Further, the size of the protrusion 45 may be changed.

Means 5 The sectional shapes of the conductive guide rod 38 and the through holes 21, 22, 38 may be changed. For example, as shown by the dotted line in FIG.
The terminal block 47 can be specified by changing the thickness and the like. Such a configuration that the external terminal piece 30 is not erroneously inserted into a predetermined terminal block is required.
The work of wiring is divided into tasks, and the work of inserting the amplifier terminal 36 into each of the external terminal pieces 30 and the work of assembling the external terminal pieces 30 can be shared and executed, and wiring can be performed efficiently.
Even if the person in charge is different in each work, it can be mounted without wire connection mistake (wrong insertion).

In the above embodiment, one external terminal piece 30
Although the example of one rail 4 has been described, two rails 4 may be provided. The conductive substrate has an effect of relaying, dividing, and distributing a plurality of wirings, and can be used for distributing a plurality of wirings such as three wirings and four wirings as well as two wirings. In particular, the configuration of the present invention can easily increase the number of wires in one detachable terminal block only by partitioning by the partition wall of the housing to increase the number of wires. This can be realized by increasing the size of the conductive substrate as necessary. In addition, since the switchboard is merely provided with an additional detachable terminal block, the extension panel can be easily changed. Although the intermediate moving body and the external terminal piece are provided by being fitted to the conductive guide rod provided on the conductive substrate, the electrical contact state with the conductive guide rod by the above-mentioned fitting is such that the current capacity is sufficiently secured. If possible, the magnetic attraction means may not be required. It is preferable that the input / output terminal is a mounting bracket provided at an end of the wiring and called an amplifier terminal. In addition, what is called an egg-shaped lug may be a conductive plate.

The fixing means for the external terminal piece may be any fixing means that can be detached and detached. In addition to the hook, after the external terminal piece is pushed in, the electrical connection position between the amplifier terminal and the conductive substrate, that is, the stop position is set. Then, the external terminal may be rotated so as to be hooked and fixed to the fixing piece. It is desirable from the viewpoint of safety that the external terminal strip is integrally provided with an insulating holder on the outside to prevent the external terminal strip to which a voltage is applied from being exposed. The material of the insulating holder is desirably plastic, especially synthetic resin. If the tip surface of the conductive guide bar is exposed and is not desirable from the viewpoint of safety, it is desirable to cover the conductive guide bar with an insulating member.

[0047]

As described above, the detachable terminal block according to the present invention allows the terminal block to be detachably connected to the external terminal strip without using a screw to connect the electric wire to the terminal block. It has the effects of shortening the working time, reducing the number of jigs, preventing short circuits and ground faults in electric circuits, preventing electric shocks to workers, and preventing mistakes in connection of electric wires in connection work and wiring replacement work.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining a switchboard using a detachable terminal block according to the present invention.

FIG. 2 is a perspective view illustrating the detachable terminal block of FIG. 1;

FIG. 3 is a cross-sectional view for explaining a state in which an external terminal is inserted into a conductive guide rod in a housing of FIG. 2;

FIG. 4 is a cross-sectional view for explaining a wiring state by further inserting an external terminal into a conductive guide bar from the step of FIG. 3;

5 is a front view of an amplifier terminal inserted into the external terminal piece of FIG. 3;

FIG. 6 is a plan view for explaining a state in which the amplifier terminal of FIG. 5 is mounted on the external terminal piece of FIG. 3;

FIG. 7 is an exemplary perspective view for explaining the housing of FIG. 2;

FIG. 8 is a perspective view for explaining a configuration of a conductive substrate and an intermediate moving body in FIG. 3;

9 is a perspective view showing a state where the electrode mechanism of FIG. 8 is mounted on the housing of FIG. 7;

FIG. 10 is a perspective view for explaining the configuration of the external terminal strip of FIG.

FIG. 11 is a front view of the external terminal strip of FIG. 10;

FIG. 12 is a top view of the external terminal strip of FIG. 10;

FIG. 13 is a sectional view for explaining another embodiment of FIG. 3;

FIG. 14 is a sectional view for explaining another embodiment of FIG. 4;

FIG. 15 is a front view of an external terminal block for explaining another embodiment of FIG. 11;

FIG. 16 is a top view of an external terminal block for explaining another embodiment of FIG. 12;

FIG. 17 is a front view of an external terminal block for explaining another embodiment of FIG. 15;

FIG. 18 is a configuration diagram of a power transmission system for explaining a usage mode of a conventional switchboard.

FIG. 19 is an explanatory diagram of a power control housing for explaining an arrangement state of switchboards used in a large number in the substation of FIG. 18;

FIG. 20 is a perspective view illustrating the structure of a conventional switchboard.

FIG. 21 is an explanatory diagram for explaining a configuration of the switchboard of FIG. 20;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper lid, 2 ... Lower lid, 3 ... Wall plate, 4 ... Rail, 5 ... Side wall, 6 ... Stop hole, 7 ... Back plate,
Reference Signs List 8 housing, 11 conductive substrate, 12, 13 conductive guide rod, 14 spring, 15, 16 intermediate moving body, 17, 18 iron plate, 19, 20 copper plate, 2
1, 22, 38: through-hole, 30: external terminal piece, 31
... terminal part, 32 ... guide part, 33 ... magnet part,
34 terminal board, 35 box, 36 amplifier terminal, 37 annular groove, 41, 42 guide groove,
43 ... insertion hole, 44 ... hook, 45 ... projection,
46 ... permanent magnet, 47 ... detachable terminal block, 48 ...
Switchboard, 49: electric wire (wiring), 50: coated copper wall, 51: spring storage space, 52: finger hook.

Claims (6)

[Claims] A first conductive member having a storage portion for storing a contact terminal provided with a conductive contact portion at a tip of an external lead wire so that a surface of the conductive contact portion is conductively exposed; A second conductive member disposed so as to face the first conductive member, and a locking member connecting the first and second conductive members so as to maintain a conductive contact state between the first and second conductive members. An elastic member for forcibly releasing a conductive contact state between the first and second conductive members in accordance with release of the locked state of the locking member. 2. The detachable terminal device according to claim 1, wherein the conductive contact portion provided at the tip of the external lead wire is formed in an annular shape. 3. The second conductive member has a conductive rod, and the conductive rod penetrates the annular conductive contact to form an electrical connection between them. The detachable terminal device according to claim 2. 4. The detachable terminal device according to claim 2, wherein said elastic member is a coil spring inserted into said conductive rod. 5. A movable part receiving opening is formed on the front surface, and a hook portion is formed on a side surface. A conductive rod is protruded from a conductive substrate behind the movable part receiving opening. A terminal block fixing portion in which a connection metal in which a movable conductive plate having an insertion hole for the conductive bar is inserted through a coil spring is inserted; and a terminal block fixing portion formed to be insertable into a movable portion receiving port of the terminal block fixing portion. On the side surface, a locking claw portion that can be engaged with the claw hook portion of the fixed terminal block by being inserted into the movable portion receiving port of the terminal block fixing portion against the elastic force of the coil spring is extended. Further, a lead wire insertion hole is formed at the base of the locking claw portion, and a front surface provided at a position retracted from the lead wire insertion hole has a front surface which is inserted into the movable portion receiving opening of the fixed terminal block. A movable terminal block in which a fixed conductive plate having a hole portion into which the conductive rod can be loosely inserted is inserted. And a lead wire mounted with an amplifier terminal having a hole that can be inserted from a lead wire insertion opening of the terminal block fixing portion and that can be loosely fitted to the conductive rod of the fixed terminal block, An amplifier terminal is inserted through a lead wire insertion hole of the terminal block movable section, and the terminal block movable section is moved into the movable section receiving port of the fixed terminal block while holding the hole section of the amplifier terminal at a position where the conductive rod passes. The amplifier terminal is fixed to the movable conductive plate by inserting the locking claw of the movable terminal block into the claw hook of the fixed terminal block. A detachable terminal device characterized by being sandwiched between conductive plates. 6. A magnet and a magnetic material that are attracted to each other are attached to the back surface and / or the side surfaces of the movable conductive plate of the terminal block fixed portion and the fixed conductive plate of the terminal block movable portion. The detachable terminal device according to claim 5, wherein: