JP6878158B2 - Terminal device - Google Patents

Description

The present invention is, for example, relates to a terminal equipment to be used for circuit breakers and switches, and the like.

Conventionally, for example, a terminal device for connecting an electric wire or the like is installed at a power supply side terminal or a load side terminal of a circuit breaker. Further, as such a terminal device, a square box-shaped terminal fitting formed by bending a metal plate into a square-shaped cross section that opens on both front and rear sides and having an insertion space into which an electric wire or the like can be inserted, and a square box-shaped terminal fitting. A terminal screw that can be screwed into the insertion space from the upper surface of the metal fitting and a band-shaped terminal seat that can be inserted into the insertion space from one opening of the square box-shaped terminal metal fitting are known. Then, in such a terminal device, when the terminal screw is loosened when attaching / detaching an electric wire or the like, the terminal seat is set to a circuit breaker or the like so that the tip of the terminal seat does not rise in the square box-shaped terminal fitting. It was screwed to the case (for example, Patent Document 1). Further, in order to achieve the same purpose, there is also a case in which a metal fitting dedicated to preventing lifting is separately attached to the tip side of the terminal seat.

Japanese Unexamined Patent Publication No. 2001-155572

However, if a structure in which the terminal seat is screwed to the case or a special metal fitting is attached is adopted, the structure becomes complicated and the number of parts increases, resulting in high cost. There is also a problem that the assembly work of the terminal device is complicated.

The present invention has been made in view of the above problems, it is intended to provide a terminal equipment capable of preventing the floating of the front end portion of the terminal seat in a simpler structure and assembly work.

To achieve the above object, the present onset Ming, top, both sides, and becomes by bending a metal plate so as to surround the lower surface, and the corner box-terminal fitting having an open space in the front-rear direction in the center, the front-rear direction It is formed in a band shape extending to, and can be screwed into the space from the upper surface of the square box-shaped terminal fitting and the terminal seat which is attached with the tip side inserted into the space through the opening. A terminal device including a terminal screw for electrically connecting an electric wire inserted into the space through the opening opposite to the terminal seat and the terminal seat, and is on the tip end side of the terminal seat. both sides of, while engaging protrusions protruding sideways are provided respectively on both sides of the angle box-shaped terminal fitting, the engaging projection is engaged in a state in which the terminal seat is attached It is characterized in that each engagement hole is provided.
A metal plate is bent so as to surround the upper surface, both side surfaces, and the lower surface, and a square box-shaped terminal fitting having a space that opens in the front-rear direction in the center and a band shape extending in the front-rear direction are formed at the tip thereof. A terminal seat that is attached with the side inserted into the space through the opening, and a terminal seat that can be screwed into the space from the upper surface of the square box-shaped terminal fitting and through the opening opposite to the terminal seat. A terminal screw for electrically connecting the electric wire inserted in the space and the terminal seat is provided, and an engaging portion is provided on the side portion on the tip end side of the terminal seat. , a side of the angle box-shaped terminal fitting in the assembly process of the engaging portion is the terminal device engaged portion is provided which engages in a state in which the terminal seat is attached, the terminal seat from the horizontal position The first step is to tilt the front-back direction as an axis, insert the tip end side of the terminal seat into the space while keeping the posture, and apply the engaging portion to the engaged portion, and the front-back direction as the axis. By twisting the terminal seat and returning the terminal seat to the horizontal posture, the engaging portion is engaged with the engaged portion, and the terminal seat and the square box-shaped terminal fitting are integrated. A method of assembling the terminal device such as executing the second step is also conceivable.
By adopting such a terminal device assembly method, the terminal seat and the square box-shaped terminal fitting can be integrated without using a tool or the like, and the terminal device assembly work can be simplified. Can produce the effect of being able to.

According to the present invention, the distal end side of the terminal seat, while the engaging projection projecting laterally is provided respectively engaging projection on both sides of the corner box type terminal fittings, in a state where the pin seat is attached There for engaging hole to be engaged are provided respectively, by engaging the engaging projections into the engaging holes, or screwed to the terminal seat on the case, without or mounting a special bracket, terminal It is possible to prevent the tip of the seat from rising. Therefore, the structure can be simplified, the number of parts can be reduced, and the cost can be reduced.

It is explanatory drawing which showed the upper case and the lower case of a circuit breaker. It is a perspective explanatory view which showed the terminal device. It is a perspective explanatory view which showed the terminal seat.

Hereinafter, a circuit breaker including a terminal device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory view showing an upper case 16 and a lower case 17 of a circuit breaker. FIG. 2 is a perspective explanatory view showing the terminal device 1, and FIG. 3 is a perspective explanatory view showing the terminal seat 4.
The circuit breaker has a main body case in which an upper case 16 and a lower case 17 made of synthetic resin are assembled, and terminal installation portions 18 and 18 constituting power supply side terminals are rear portions in the front portion of the lower case 17. The terminal installation portions 19 and 19 constituting the load-side terminals are provided on the above, respectively. Further, in the main body case, an electric path (not shown) for electrically connecting the terminal device 1 installed in the terminal installation unit 18 and the terminal device 1 installed in the terminal installation unit 19 can be arranged. It has become. Reference numeral 20 denotes an operation window for exposing a handle (not shown) for operating the electric path on / off.

Here, the terminal device 1 installed in the terminal installation portions 18 and 19, which is the main part of the present invention, and the method of assembling the terminal device 1 will be described.
The terminal device 1 has a square box-shaped terminal fitting 2 into which an electric wire or the like can be inserted, a terminal screw 3 that can be screwed into the square box-shaped terminal fitting 2, and a terminal seat that is inserted and attached to the square box-shaped terminal fitting 2. It is equipped with 4. The square box-shaped terminal fitting 2 is formed by bending a metal plate into a square shape including an upper surface, left and right side surfaces, and a lower surface. The space that opens on both the front and rear sides in the center of the square box-shaped terminal fitting 2 functions as an insertion space S into which the electric wire and the terminal seat 4 can be inserted from the front and back. Further, on the left and right side surfaces of the square box-shaped terminal fitting 2, an engaging hole 5 penetrating from the surface to the inner surface is provided at a position substantially centered in the front-rear direction and at the same level as the inner surface of the lower surface in the vertical direction. Each is pierced. On the other hand, the terminal seat 4 is a strip-shaped metal plate extending in the front-rear direction, and a set of cut-up portions 6a and 6b are provided in the front portions of the left and right side edges at predetermined intervals in the front-rear direction. When connecting the electric wires, the electric wires are stably positioned in the center in the left-right direction of the terminal seat 4. Further, on the left and right side edges of the terminal seat 4, engaging projections 7 projecting outward to the left and right are provided at positions between the front and rear of the raised portions 6a and 6b, respectively. A screw hole 8 for screwing the terminal screw 3 is provided on the upper surface of the square box-shaped terminal fitting 2.

When assembling the terminal device 1, the terminal seat 4 is tilted left and right with respect to the front-rear direction from the horizontal posture, and the tip side of the terminal seat 4 is inserted into the square box-shaped terminal fitting 2 in that posture. It is inserted into S, and either the left or right engaging protrusion 7 is applied to the corresponding engaging hole 5. After that, the terminal seat 4 may be twisted around the front-rear direction to return to the horizontal posture, so that the other engaging projection 7 is also made into the engaging hole 5. Then, with the lower surface of the terminal seat 4 in contact with the inner surface of the lower surface of the square box-shaped terminal fitting 2, the terminal seat 4 is fixed to the square box-shaped terminal fitting 2, and is pressed by the terminal screw 3, even if it is pressed by the terminal screw 3. Even in the absence state, the tip of the terminal seat 4 does not rise. The terminal screw 3 may be attached to the square box-shaped terminal fitting 2 before or after the terminal seat 4 is attached to the square box-shaped terminal fitting 2.

Further, the terminal device 1 may be housed in the terminal installation portions 18 and 19 in such a posture that the terminal seat 4 extends inward of the main body case. Then, after inserting the electric wire into the insertion space S of the square box-shaped terminal fitting 2 from the outside of the main body case into the terminal device 1 installed in this way, the tip of the terminal screw 3 is screwed into the insertion space S. When the electric wire is pressed against the terminal seat 4 of the square box-shaped terminal fitting 2, the electric wire and the electric circuit in the circuit breaker connected to the base end of the terminal seat 4 are electrically connected.

According to the terminal device 1 having the above configuration, the engaging projections 7 and 7 protruding outward in the left-right direction are provided on the tip end side of the terminal seat 4, while the square box-shaped terminal fitting 2 Engagement holes 5 and 5 with which the engagement protrusions 7 and 7 are engaged are provided on the side surface in a state where the terminal seat 4 is attached. Therefore, by engaging the engaging protrusions 7 and 7 with the engaging holes 5 and 5, the terminal seat 4 does not need to be screwed to the main body case or a special metal fitting is attached to the tip of the terminal seat 4. It is possible to prevent lifting. Therefore, the structure can be simplified, the number of parts can be reduced, and the cost can be reduced.

Further, when attaching the terminal seat 4 to the square box-shaped terminal fitting 2, the terminal seat 4 is tilted from the horizontal posture with respect to the front-rear direction, and the tip side of the terminal seat 4 is inserted into the insertion space S in that posture. Insert and apply either the left or right engaging protrusion 7 to the corresponding engaging hole 5. After that, the terminal seat 4 may be twisted around the front-rear direction to return to the horizontal posture, so that the other engaging projection 7 is also made into the engaging hole 5. Therefore, the terminal seat 4 and the square box-shaped terminal fitting 2 can be integrated without using a tool or the like, and the assembly work of the terminal device 1 can be simplified.

The terminal device and the method of assembling the terminal device according to the present invention are not limited to the embodiment of the above embodiment, and the configuration of the square box-shaped terminal fitting, the terminal seat, and the like also deviates from the gist of the present invention. It can be changed as needed to the extent that it does not.

For example, in the above embodiment, the engaging hole is provided on the side surface of the square box-shaped terminal fitting as the engaged portion, but instead of the hole, a recess is provided in the insertion space and the recess is also used as the engaged portion. Good.
Further, it is also possible to provide a concave engaging portion on the side portion of the terminal seat and a protruding engaged portion on the inner surface side of the side surface of the square box-shaped terminal fitting.
Further, although the engaging portions are provided on both the left and right side portions of the terminal seat, it may be provided only on one of the left and right side portions, and in that case, the engaged portion is also provided on only one of the left and right side surfaces corresponding to each other. It may be provided in.
In addition, although the terminal device installed in the circuit breaker is described in the above embodiment, the terminal device according to the present invention can be suitably used as a terminal of another electric device such as a switch. ..

1 ... Terminal device, 2 ... Square box-shaped terminal bracket, 3 ... Terminal screw, 4 ... Terminal seat, 5 ... Engagement hole (engaged part), 7 ... Engagement protrusion (engagement part) ), S ... Insert space.

Claims (1)

A square box-shaped terminal fitting that is made by bending a metal plate so as to surround the upper surface, both side surfaces, and the lower surface, and has a space that opens in the front-rear direction in the center.
A terminal seat that is formed in a strip shape that extends in the front-rear direction and is attached with its tip side inserted into the space through the opening.
A terminal that can be screwed into the space from the upper surface of the square box-shaped terminal fitting and electrically connects the electric wire inserted in the space and the terminal seat through the opening opposite to the terminal seat. It is a terminal device equipped with screws.
Both sides of the front end side of the terminal seat, while the engaging projection projecting laterally is provided respectively,
On both sides of the angle box-shaped terminal fitting engagement hole in which the engaging projection is engaged in a state in which the terminal seat is attached a terminal device, characterized in that provided respectively.

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