JP3287892B2 - Terminal block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block for connection between electric wires as a terminal treatment of the electric wire, and more particularly to an improvement of a terminal block having a function of connecting and disconnecting each connection seat.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a terminal block of this type having a simple structure, a bottom plate b protruding from one surface of a substrate a formed of an insulating resin material such as polycarbonate, and an upwardly extending end from both ends of the bottom plate b. The extended portions c and c and the thick portions such as the partition d separating the left and right portions are integrally formed, and the conductive plate e is mounted on the upper end of the support c and c in the left-right direction across the partition d. The left and right portions on the conductive plate e separated by the partition wall d are used as connection seats f, f. On the connection seats f, f, crimp terminals 51, 51 each having a ring shape or the like fixed to the ends of the conductors 50, 50 are placed, respectively, across the insertion holes of the conductive plate e, and fixing bolts g are screwed on. Thus, the crimp terminal 51 is fixed. Then, by this, the left and right connection seats f
f, the conductor 5 fixed by the fixing bolt g
0 and 50 are electrically connected to each other via the conductive plate e.

[0003]

In such a configuration,
A large number of the terminal blocks are connected back and forth, and a protective cover h is mounted on the row of the terminal blocks so as to be fitted to the upper edge of each substrate a. The protective cover h shields the conductive plate e to prevent an electrical accident.

[0004] In such a configuration, when connecting the crimp terminal m, the protective cover h must be removed, which is troublesome. Also, short circuit accidents could occur due to forgetting to attach the protective cover.

Further, when connecting to the terminal plate, the connection is usually made after the current is cut off by the main unit. However, there are cases where the connection is inadvertently made without cutting off the current of the main unit. In case of electric current, it may lead to electric shock accident.

As described above, the means for protecting the connection seat by attaching the protective cover h can be said to be an imperfect one that cannot sufficiently prevent an electrical accident.

An object of the present invention is to provide a terminal block having a configuration capable of eliminating the problems of the conventional configuration.

[0008]

According to the present invention, a substrate formed of an insulating resin material is provided with left and right connection seats each having a conductive plate disposed thereon, and an operation port is formed above each connection seat. In addition, a guide groove in the left and right direction is formed around the operation port, and a hoistway that is opened upward is provided between the two conductive plates provided at the connection seats. An operation knob having a plate and having a flexible tongue suspended from both side surfaces of the main rod portion can slide the flexible tongue from the inside into the guide groove of the operation port. The main rod portion is inserted into the hoistway so as to be able to move up and down, and the contact / separation plate is opposed to the adjacent edge of the conductive plate pair in a spanwise manner. While the operation port is shielded by the flexible tongue,
The contact / separation plate contacts the adjacent edge of the pair of conductive plates in a bridging manner to electrically connect the pair of conductive plates.

[0009]

When the operation knob disposed in the middle portion of the connection seat is pulled upward, the flexible tongue slides in the guide groove of the operation port and moves inward with the rise of the main rod portion. Then, the operation port is opened. At this time, the contact / separation plate held at the lower end of the main rod portion rises, and the conductive plate pair is in an electrically disconnected state. In this state, the operation of connecting the electric wire to the conductive plate of each connection seat is performed using the operation port. Next, when the operation knob is pushed downward, the contact / separation plate comes into contact with the adjacent edges of both conductive plates in a crosswise manner, so that both conductive plates are electrically connected, and the operation port is open. The connection is protected by the flexible tongue, and the connection seat is protected. That is, in this configuration, the opening of the operation port and the electrical separation of the pair of conductive plates are performed in synchronization with each other, and during the wiring work, the conductive plates are in a no-load state, and the safety of the connection work is reduced. Nature is secured.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows a terminal block 1 according to one embodiment of the present invention, and a substrate 2 formed of an insulating resin material such as polycarbonate.
On one surface, thick portions such as partition walls 3 and 3 separating the left and right portions and a bottom plate 4 are integrally formed. The plates 6 and 6 are mounted, and the connection seats 5 and 5 are formed on the conductive plates 6 and 6. The inner ends of the conductive plates 6 and 6 are bent upward at right angles to form adjacent edges 8 and 8, and engaging grooves 9 are formed in the adjacent edges 8 and 8 (see FIG. 3). Female screws 7 are formed on the main plate surfaces of the conductive plates 6 and 6.

The loading sections 10 are provided on the left and right partition plates 1.
And the upper and lower edges of the partition plates 11, 1
An operating space 13 is formed between the two. The working space 1
3 is provided with a ridge 14 and a lower end of a U-shaped elevating piece 15, and the urging force of the ridge 14 is applied to the lower side of the elevating piece 15 to urge the elevating piece 15 upward. Further, the lifting piece 15 is supported by inserting a terminal screw 18 into a through hole formed in the upper side thereof. The terminal screw 18 vertically coincides with the female screw 7.

The partition walls 3, 3 and the left and right partition plates 12, 1
Between the two, a hoistway 19 that opens upward is formed.

On the other hand, on the conductive plates 6 and 6, operation ports 20 and 20 which are opened upward are provided. This operation port 2
0 and 20 are formed so as to be surrounded by a thick portion of the peripheral portion. That is, a beak-shaped rising portion 24 having upper and lower sliding holes 25 forming the upper portion of the hoistway 19 is formed at the center above the partition walls 3, 3, and beside the operation ports 20, 20. A thick edge 27 is formed, and the base end of the beak-shaped rising portion 24 and the thick edge 27 surround the operation ports 20, 20.

An operating gap 28 is formed between the upper ends of the partition walls 3 and 3 and the base end of the beak-shaped rising portion 24 so as to widen upward. The sliding groove 29 is formed on the inner side of the wall, and the supporting groove 30 is formed inside the thick edge portion 27. An operating gap 28, a sliding groove 29, and a supporting groove 30 are continuously formed in the left and right direction at the periphery of the operation ports 20, 20, thereby forming a guide groove.

Further, the mounting portions 10, 10 and the thick edge portion 2
Connection ports 32, 32 opened to the sides are formed between 7, 27, so that the electric wires 50, 50 can be electrically connected at the connection seats 5, 5.

Further, a sliding hole 25 of the beak-shaped rising portion 24 is provided.
A moderation locking groove 26 is formed at the upper end of the boss. Upper and lower locking groove surfaces 36, 36 on which the name plates 33, 33 are fitted, are formed on both side surfaces of the beak-shaped rising portion 24. The name plates 33, 33 indicate the electrical role of the connection seats 5, 5, and the like.

An operation knob 40 made of a synthetic resin material is mounted on the hoistway 19. The operation knob 40 is formed mainly of a main rod portion 41 having an operation portion 42 formed at an upper end, and a contact / separation plate 43 made of a conductive metal material is penetrated at the lower end of the main rod portion 41 in the left-right direction. Is held.
Flexible tongues 44, 4 are provided from both sides of the main rod portion 41.
4 is erected. Moderation ridges 45 that fit into the support grooves 30 are formed at the tips of the flexible tongues 44, 44. Further, detent protrusions 46 and 47 are formed on both side surfaces of the main rod portion 41 so as to be fitted into the locking grooves 26 and lock the operation knob 40 at an open position and a closed position, respectively.

The operation knob 40 has a main rod portion 41 fitted in the support groove 30 and flexible tongues 4 in the guide grooves 31, 31.
4 and 44 are slidably mounted, and the operation portion 42 is projected from the beak-shaped rising portion 24. And the contact / separation plate 43
Are vertically and vertically opposed to the engaging grooves 9 of the adjacent edges 8, 8 of the conductive plates 6, 6, respectively.

The operation of the above configuration will be described. When the operation knob 42 is pulled to the raised position as shown in FIG. 2, the moderation projection 47 at the bottom is fitted into the locking groove 26, and is held in the open position. The flexible tongues 44 slide in the guide grooves 31, 31 to open the operation ports 20, 20, and the contact / separation plate 43 is positioned on the adjacent edges 8, 8, so that the conductive plates 6, 6 The pair is electrically disconnected. When the terminal screw 18 is detached from the female screw 7 by operating a driver from the operation ports 20, 20, the lifting piece 15 is raised by the urging force of the sprung 14, and the conductive plates 6, 6 and the mounting section 10, 10 and an insertion gap is generated. Thereafter, an annular or fork-shaped crimp terminal 51 fixed to the tip of the electric wire 50 is inserted through the connection ports 32, 32, and a screwdriver is inserted again through the operation ports 20, 20, so as to resist the protrusion 14. The lifting screw 15 is pressed down, the terminal screw 18 is screwed into the female screw 7 of the conductive plate 6, 6, and the crimping terminal 51 is sandwiched between the conductive plate 6, 6 and the upper side 16 of the lifting plate 15, and the Make a static connection.

After the above operation is performed on both the connection seats 5 and 5, the operation portion 42 of the operation knob 40 is pushed down to the closed position. As a result, the flexible tongue pieces 44 slide in the guide grooves 31 and the detent protrusions 46 are fitted into the locking grooves 26 of the slide holes 25, and the flexible tongue pieces 4
4 and 44 are held at the positions where the moderation protrusions 46 are fitted in the support grooves 30, and furthermore, the engagement and separation plates 43 at the lower end of the main rod portion 41 are formed on the adjacent edges 8 and 8 of the conductive plates 6 and 6. The conductive plates 6 and 6 of the connection seats 5 and 5 are electrically connected to each other through the contact and separation plate 43.

In such a state, the operation ports 20, 20
Are interrupted by flexible tongues 44, 44,
5 is shielded from the outside to prevent a human electric shock accident and various electrical short-circuits caused by screws or the like falling from the operation ports 20 and 20 to the inside.

As described above, when the operating knob 40 is pushed, the operating ports 20, 20 are actuated by the flexible tongues 44, 44.
Is shielded, and the contact / separation plate 43 comes into contact with the adjacent edges 8, 8 of the pair of conductive plates 6, 6 in a spanwise manner to secure electrical connection. Further, by pulling the operation knob 40, the operation ports 20, 20 are opened and the conductive plates 6, 6 are electrically disconnected from each other at the same time.

It should be noted that a plurality of the terminal blocks 1 having such a configuration are connected in the front-rear direction to form the terminal block 1.

[0024]

As described above, according to the present invention, the lower end of the main rod portion 41 is provided with the contact / separation plate 43, and the flexible tongue pieces 44, 44 are suspended from both side surfaces of the main rod portion 41. Operating knob 40
The flexible tongues 44, 44 are slidably inserted into the guide grooves 31, 31 of the operation ports 20, 20 formed on the connection seats 5, 5, and the contact / separation plate 43 is connected to the connection seats 5, 5. The operation ports 20, 20 are shielded by the flexible tongue pieces 44, 44 when the operation knob 40 is pressed in a state in which the operation ports 20, 20 are placed on the adjacent edges 8, 8 of the conductive plate pairs 6, 6 provided in At the same time, the contact / separation plate 43 is arranged to contact the adjacent edges 8, 8 of the pair of conductive plates 6, 6 in a spanwise manner. Further, by pulling the operation knob 40,
The opening of the operation ports 20 and the electrical disconnection of the conductive plates 6 and 6 are simultaneously performed. Therefore, the electric wire 5
0, the left and right conductive plates 6 and 6 are always electrically separated from each other, so that an inadvertent electrical accident can be eliminated. The conductive plates 6 and 6 are easily connected by the contact / separation plate 43, and in this state, the operation ports 20 and 20 are reliably shut off by the flexible tongue pieces 44 and 44, and the operation port 2
From 0,20, a secondary accident due to a drop of a screw or the like is also prevented, and furthermore, there is an excellent effect that the opening / closing operation of the operation ports 20,20 can be easily performed only by raising / lowering the operation knob 40.

[Brief description of the drawings]

FIG. 1 is a front view of a terminal block 1 according to an embodiment of the present invention, showing a shielding position of an operation knob 40. FIG.

FIG. 2 is a front view of the terminal block 1 according to the embodiment of the present invention, showing an open position of the operation knob 40;

FIG. 3 is a perspective view of an operation knob 40 and conductive plates 6 and 6;

FIG. 4 is a front view showing a terminal block having a conventional configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal block 2 Substrate 5, 5 Connection seat 6, 6 Conductive plate 8, 8 Adjacent edge 15 Elevating piece 18 Terminal screw 19 Hoistway 20, 20 Operation port 31, 31, Guide groove 40 Operation knob 41 Main rod part 43 Contacting / separating plate 44,44 Flexible tongue piece 46 Moderation protrusion 50 Electric wire 51 Crimp terminal

Claims (1)

(57) [Claims] 1. A substrate formed of an insulating resin material,
Left and right connection seats each provided with a conductive plate are provided, an operation port is formed at an upper portion of each connection seat, a left-right guide groove is formed around the operation port, and the connection seat is provided at each of the connection seats. A hoistway that is open upward is provided between the two conductive plates provided, and furthermore, a contact / separation plate is provided at the lower end of the main rod portion, and a flexible tongue is vertically suspended from both side surfaces of the main rod portion. The flexible tongue piece is slidably inserted into the guide groove of the operation port from the inside, and the main rod portion is slidably inserted into the hoistway so as to move up and down. When the operation knob is pushed down, the operation port is shielded by the flexible tongue, and the contact / separation plate is connected to the adjacent edge of the conductive plate pair. A terminal block characterized in that both pairs of conductive plates are electrically connected by contacting with each other.