JPH0720855Y2 - Terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a terminal device for electric equipment such as a circuit breaker or an electromagnetic contactor.

[Conventional technology]

In this type of terminal device, as shown in FIG. 4, a terminal screw 6 is attached to a fixed terminal plate 2 extending substantially horizontally from a standing wall 1a provided in a body 1 of an electric device such as a circuit breaker or an electromagnetic contactor. Box-shaped terminal frame 3 in which the upper piece 3e screwed together is connected to the lower piece 3c by both side pieces 3f to form an opening 3g through which the connecting conductor can be inserted in the direction of the standing wall 1a.
Is fixed by screwing a mounting screw 4 loosely inserted in the fixed terminal plate 2 to a lower piece 3c, and further, the upper and lower pieces 3c of the box-shaped terminal frame 3,
The conductor pressing piece 5a of the metal plate 5 in which the terminal screw 6 contacts the upper surface between 3c
In some cases, the retaining piece 5f of the metal plate 5 is interposed between the both side pieces 3f of the terminal frame 3 and the standing wall 1a.

[Problems to be solved by the invention] However, in the above-described terminal device, when the space between the both side pieces 3f of the terminal frame 3 and the standing wall 1a is small, the retaining piece 5f of the dowel 5 is disposed on either side. When the space is large, there is a risk that it will be caught and cannot move up and down smoothly, and rattle of the metal plate 5 will occur, causing it to come off from the box-shaped terminal frame 3.

For this reason, when fixing the lower piece 3c of the box-type terminal frame 3 to the fixed terminal plate 2, it is necessary to perform mutual alignment with the intervening retaining piece 5f of the metal plate 5, and workability is deteriorated. It was

Further, even if the mutual alignment is sufficiently performed, the mutual displacement may occur due to unsatisfactory fixing or deformation of parts at the time of fixing each other or tightening the connection conductor by the terminal screw 6. was there.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a terminal device that can easily fix a box-shaped terminal frame to a fixed terminal plate and can smoothly move a metal plate.

[Means for Solving the Problems]

In order to solve such a problem, the terminal device of the present invention is fixed to at least one of the upper and lower pieces of the terminal frame by fixing screws to the fixed terminal plate by protruding from the retaining piece of the metal plate on the standing wall side with respect to both side pieces. It is formed by forming a positioning protrusion that determines the position.

[Action]

In the terminal device of the present invention, when the box-shaped terminal frame is fixed to the fixed terminal plate, the positioning protrusions of the terminal frame are fixed in contact with the standing wall of the electric device so that both side pieces of the terminal frame and the standing wall are fixed. The space between them can always be a predetermined space, and the mutual positional deviation can be reduced by abutting against the standing wall.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In the body 1 of electrical equipment such as circuit breakers or electromagnetic contactors,
The standing wall 1a, side walls 1b located on both sides of the standing wall 1a, and a terminal seat 1d having a through hole 1c formed under the standing wall 1a and the side wall 1b are formed.

Further, a fixed terminal plate 2 made of a conductive material such as copper or a copper alloy, which is fixed to the body 1, is led out substantially horizontally from the standing wall 1a between the side walls 1b and placed on the terminal seat 1d.

The fixed terminal plate 2 is formed with a protrusion 2b having a screw hole 2a which is inserted into the through hole 1c, and has a screw hole 2b on the upper surface.
A groove 2c that passes through and goes toward the standing wall 1a is formed.

Further, the terminal frame 3 is placed and fixed on the upper surface of the fixed terminal plate 2.

The terminal frame 3 is formed by bending a plate material made of a conductive material such as copper or a copper alloy, polymerizing both pieces 3a and 3b thereof, and facing the lower piece 3c of the superposed portion and the lower piece 3c. The upper side 3e having the screw hole 3b of the same size as the screw hole 2a of the fixed terminal board 2
And the side pieces 3f, 3f on both sides connecting the upper and lower pieces 3e, 3c, an opening 3g for inserting a connecting conductor such as an electric wire or a conductor bar.
It has a box shape.

In this lower piece 3c, a hole 3h is formed in the piece 3b located on the lower side of the lower piece 3c, and the piece 3a located on the upper side of the lower piece 3c is fitted in the hole 3h so that the overlapping of the plate materials does not separate. The protrusion 3i is formed.

Further, the projection 3i is formed with a screw hole 3j having a diameter smaller than that of the screw hole 3d formed in the upper piece 3e.

If the screw hole 3j is formed after the protrusion 3i is fitted into the hole 3h, the fitting force can be strengthened.

Further, on the lower surface of the lower piece 3c, the protrusion 3 is provided on the side of the opening 3g and on the opposite side.
K and 3k are projected, and the terminal frame 3 is placed on the fixed terminal plate 2, and the protrusions 3k and 3k are fitted into the grooves 2c of the fixed terminal plate 2 to prevent the terminal frame 3 from rotating. There is.

Moreover, the upper and lower pieces 3e and 3c of the terminal frame 3 have side pieces 3f on both sides,
Positioning protrusion that protrudes toward the standing wall 1a side of the body 1 with respect to 3f
3 m and 3 m are formed, and in the state of being fixed to the fixed terminal plate 2, the tips of the positioning protrusions 3 m and 3 m contact the standing wall 1 a.

Then, this terminal frame 3 is fixed by the protrusion 3k of the terminal frame 3,
3k is fitted in the groove 2c of the fixed terminal plate 2 and the positioning protrusion 3m,
With 3m in contact with the standing wall 1a, the spring washer 4a is installed through the screw hole 2a formed in the fixed terminal plate 2, and the mounting screw 4 is attached.
Is screwed into the screw hole 3i of the lower piece 3c.

At this time, since the screw hole 2a of the fixed terminal plate 2 is larger than the size of the mounting screw 4, the mounting screw 4 and the screw hole 2a of the fixed terminal plate 2 are not in a threaded relationship.

Further, the conductor pressing piece 5a of the metal plate 5 is interposed between the upper and lower pieces 3e and 3c of the terminal frame 3, and the connection conductor inserted through the opening 3g is sandwiched between the lower and the lower piece 3c of the terminal frame 3.

The conductor pressing piece 5a of the metal plate 5 is formed by bending the opening 3g side into which the connecting conductor 2 is inserted upward and inclining the front portion 5b and the lower piece 1c.
And a rear part 5c which is substantially parallel to the front part 5b.
The insertion of the connection conductor is guided by the inclination of.

Further, downward ear pieces 5d, 5d are formed on both sides of the front portion 5b so as to bring the connecting conductor to the center.

Further, on the metal plate 5, both ends of the conductor pressing piece 5a are bent upward so that the side pieces 3f and 3f of the terminal frame 3 are faced and sandwiched and substantially parallel to the side pieces 3f and 3f. A guide piece 5e on the side of the opening 1g into which is inserted and a retaining piece 5f on the side of the standing wall 1a of the body 1 are formed.

The equipment 5 is mounted on the terminal frame 3 by inserting the housing 5 into the terminal frame 3 with the housing 5 substantially vertical, and rotating the housing 5 when it is inserted. The guide piece 5e and the retaining piece 5f prevent the terminal frame 3 from being detached.

The retaining piece 5f of the metal plate 5 is a positioning protrusion 3m of the terminal frame 3,
Since it is interposed in a predetermined space between the standing wall 1a defined by 3m and the side pieces 3f, 3f of the terminal frame 3, smooth vertical movement can be expected without being caught by any one.

Moreover, the screw portion 6c of the terminal screw 6 equipped with the spring washer 6a and the washer 6b is screwed into the screw hole 3d of the terminal frame 3, and the tip of the screw portion 6c is attached to the conductor pressing piece 5a of the dowel 5. The front portion 5b and the rear portion 5c are in contact with the bent portion in a V shape.

When the connecting conductor is tightened and connected by abutting the bent part on the bent part, force is applied only to the part corresponding to the tip of the screw part 6c of the terminal screw 6, and the conductor pressing piece 5a is deformed. However, since the conductor pressing piece 5a of the dowel 5 is bent in a V shape between the front portion 5b and the rear portion 5c in advance, the front portion 5b and the rear portion
Although the conductor pressing piece 5a is slightly inclined due to the balance of the inclination with the 5c, the bending of the conductor pressing piece 5a is reduced, and it is possible to suppress the inclination of the guide piece 5e and the retaining piece 5f due to this bending. Become.

This makes it possible to expect a smooth vertical movement of the metal plate 5 without providing an extra space between the partition wall 1a and the side pieces 3f, 3f of the terminal frame 3.

Then, by tightening the terminal screw 6, the conductor pressing piece 5a of the metal plate 5 is connected by pressing the connection conductor against the upper surface of the lower piece 3c of the terminal frame 3.

When the connection conductor is a crimp terminal, the crimp terminal is interposed between the washer 6b of the terminal screw 6 and the upper piece 1c of the terminal frame 1, and the connection screw is tightened to connect the connection conductor to the terminal frame 3
Connect by pressing on the upper surface of the upper piece 3c.

The terminal screw 6 can also be screwed into the screw hole 2a of the fixed terminal plate 2 having the same diameter as the screw hole 3d of the terminal frame 3, and when the terminal frame 3 is not used, this fixing It is also possible to connect the connection conductor by being screwed into the screw hole 3a of the terminal plate 2.

In the above-described embodiment, the positioning protrusions 3m, 3m are formed on the upper and lower pieces 3e, 3c of the terminal frame 1, but they may be formed on at least one of them.

[Effect of device]

As described above, in the terminal device of the present invention, at least one of the upper and lower pieces of the terminal frame is projected toward the standing wall side with respect to the both side pieces more than the retaining piece of the metal plate, and the fixing position to the fixed terminal plate by the mounting screw is determined. Since the positioning protrusions are formed, when fixing the box-shaped terminal frame to the fixed terminal plate, by fixing the positioning protrusions of the terminal frame in contact with the standing wall of the electric device, both side pieces of the terminal frame and the standing wall are fixed. Can always be a predetermined space, and the box-shaped terminal frame can be easily fixed.

In addition, since the positioning protrusions are in contact with the standing wall, mutual positional deviation due to insufficient fixing or deformation of parts when fixing or tightening the connecting conductor with the terminal screw can be reduced. The terminal device can easily fix the box-shaped terminal frame to the fixed terminal plate and can smoothly move the metal plate.

[Brief description of drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention, FIG. 2 is a perspective view of an essential part of FIG. 1, FIG. 3 is an exploded perspective view of FIG. 2 in different directions, and FIG. [FIG. 4] is a sectional front view of a conventional technique. 1 ... Body, 1a ... Standing wall, 2 ... Fixed terminal board, 2a ... Screw hole, 3 ... Terminal frame, 3c ... Lower piece, 3d ... Screw hole, 3e ...
… Upper piece, 3f …… Side piece, 3g …… Opening, 3j …… Screw hole, 3m…
… Positioning protrusion, 4… Mounting screw, 5 …… Payment, 5a ……
Conductor push piece, 5e …… Guide piece, 5f …… Prevention piece, 6 …… Terminal screw, 6c …… Screw part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuru Tomita 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References: 1-127171 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A fixed terminal plate having an electric device in which a fixed terminal plate is drawn out substantially horizontally from a standing wall of a body and a screw hole into which a mounting screw loosely inserted in the fixed terminal plate of the electric device is screwed. Between the lower piece to be fixed and the upper piece to which the terminal screw is screwed, the box-shaped terminal frame with the opening formed to connect the connecting conductor in the vertical wall direction by connecting the both side pieces, and between the upper and lower pieces of this terminal frame. A terminal device comprising: a conductor pressing piece in which the terminal screw abuts on the upper surface and both side pieces of the terminal frame; and a metal plate which is a retaining piece interposed between the standing wall of the electric device body, At least one of the upper and lower pieces of the terminal frame is formed with a positioning protrusion that protrudes more than the retaining piece of the metal plate on the side of the standing wall with respect to the both side pieces and determines a fixing position to the fixed terminal plate by the mounting screw. And terminal device.