JP4912727B2 - Terminal cover and terminal cover mounting method - Google Patents

Description

The present invention relates to a terminal cover for a circuit breaker, and more particularly to a terminal cover to be mounted on a circuit breaker having a quick connection terminal.

As for the terminal cover in the circuit breaker, various terminal covers in the circuit breaker in which the wire connection is performed by the screw terminal as disclosed in Patent Document 1, for example, are disclosed.

In general, a circuit breaker is often used as a main switch in a distribution board or as a branch switch. There are various types of distribution boards depending on the number of branch circuits required. However, if there is a possibility that the number of branch circuits will increase in the future, it is necessary to reserve in the distribution board beforehand. Since a circuit is provided, a branch switch may be provided in a predetermined position in the distribution board in advance.

Moreover, as a branch switch provided in a distribution board, in JIS C 8370, the interruption | blocking for wiring of a residential distribution board which is mainly defined as a circuit breaker used in the vicinity of a service entrance, a branch circuit, etc. Breaker type circuit breaker such as a leakage breaker for a distribution board for a house, which is defined as a leakage breaker mainly used in the vicinity of a service entrance, a branch circuit, etc. in JIS C 8371 In recent years, a safety breaker having a plug-in connection terminal as a power supply side connection terminal and a quick connection terminal as a load side connection terminal is often used.

JP-A-6-251688 FIG.

However, in a safety breaker having a plug-in type connection terminal as the connection terminal on the power source side and a quick connection terminal as a connection terminal on the load side, the safety breaker is arranged in the distribution board in comparison with the conventional safety breaker. When the work to connect the wires to each safety breaker with the safety breaker installed in the distribution board is performed, the width direction of the container in the direction to be installed is about half the size. Since the space | interval of the width direction of the container body which connects is narrow compared with the conventional safety breaker, the operation | work at the time of an electric wire connection becomes complicated.

Therefore, when a branch switch is provided as a spare circuit at a predetermined position in the distribution board in advance, normally the branch switch as the spare circuit is provided at the end of the branch switch arrangement, When installing the distribution board, it is difficult to determine which branch switch is a spare circuit from the viewpoint of the installer because many wires are exposed. Therefore, there is a problem that an electric wire may be connected to a branch switch provided as a spare circuit.

In addition, when connecting wires to branch switches other than the branch switch provided as a spare circuit, there may be cases where the wires are temporarily not connected to a specific branch switch in terms of work procedure, but the branch is not connected to the wires. There was a problem that it was difficult to distinguish between switches and there was a possibility of connecting wires by mistake.

Therefore, the present invention has been made in view of such problems,
Although it is low-cost, it has a function that can reliably prevent erroneous connection of wires, and can easily prevent incorrect connection of wires. Furthermore, when a new connection is required, The object is to provide a terminal cover that can reduce the number of work steps and is excellent in workability.

To achieve the above object, in the invention of claim 1, fast formation consisting of the inserted terminal plate and chain spring connected crimped retaining the electric wire to the electric wire by inserting the wire into the vessel body In addition to a terminal, a quick connection terminal portion provided with an electric wire insertion hole for inserting an electric wire toward the quick connection terminal in the instrument body, and for electrical inspection for measuring insulation of a load side wiring from outside the instrument body A hole ,
Wire connection indicator hole to confirm that the wire is connected from the outside of the body
A terminal cover to be attached to the quick connection terminal portion of the circuit breaker provided with
A wire insertion hole inserting portion to be press-fitted into the wire insertion hole of the circuit breaker, and electroscopic hole closing part that closes the electroscopic hole portion,
It is formed integrally with a hooking and fastening portion that is hooked on the wire connection display hole .

According to such a configuration, the wire insertion hole can be reliably closed by press-fitting the wire insertion hole insertion portion provided in the terminal cover into the wire insertion hole, and an erroneous connection of the wire to the wire insertion hole can be achieved. Can be easily and reliably prevented.

In addition , when the circuit breaker is installed on the distribution board, the terminal cover is provided so as to block all the charging parts that can be contacted from outside the device body of the circuit breaker, so that incorrect connection of the wires is ensured. In addition, it is possible to prevent an electric shock accident due to inadvertent contact with a charged part, and to provide a terminal cover that is excellent in workability and high in safety while reducing work man-hours.

According to the present invention, it is possible to reliably prevent erroneous connection of electric wires at a low cost, and to easily prevent erroneous connection of electric wires, and further, when connection of electric wires is required again. Can reduce the man-hours for connecting the electric wires, and can provide a terminal cover excellent in workability.

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

FIG. 1 is a perspective view of the terminal cover for explaining the terminal cover according to the first embodiment of the present invention.

In the figure, 1 is a terminal cover of the present invention, and 2 is a wire insertion hole insertion portion.
The terminal cover 1 protrudes from a pressing surface 6 provided so as to be pressed toward the wire insertion hole when the terminal cover 1 is attached to a terminal portion of the circuit breaker, and a surface opposite to the pressing surface 6. It is comprised by the electric wire insertion hole insertion part 2 formed and formed.

The wire insertion hole insertion portion 2 is formed to be slightly larger than the inner diameter of the wire insertion hole so that it can be press-fitted into the wire insertion hole provided in the body of the circuit breaker. For this reason, by press-fitting into the electric wire insertion hole, the terminal cover 1 itself is held in the electric wire insertion hole, and the mounting is completed.

When the terminal cover 1 is to be removed, a tool is inserted between the end of the pressing surface 6 and the surface of the container on which the wire insertion hole is provided, so that the end of the pressing surface 11 and the wire A gap is formed between the insertion hole and the hole can be removed by pulling. In addition, by providing a knob for removal at the pressing surface 6 of the terminal cover 1 or at the end of the pressing surface 6, it is possible to facilitate removal by pulling the knob.

FIG. 2 is a perspective view of the terminal cover for explaining the terminal cover of the second embodiment of the present invention.

In the present embodiment, an example of a terminal cover that assumes a case where the number of poles of a circuit breaker is two is shown. In the figure, 12 is a terminal cover, 22 is a wire insertion hole insertion portion inserted into the first pole, and 221 is a wire insertion hole insertion portion inserted into the second pole.
The terminal cover 12 is formed integrally with wire insertion hole insertion portions provided as many as the number of poles of the circuit breaker. In the present embodiment, the terminal cover 12 has the terminal cover 1 as a unit. Two covers 1 are arranged side by side through the dividing means 52.

The dividing means 52 connects the terminal covers 1 as one unit, and when dividing, the dividing means is used by cutting or breaking. Note that the terminal cover 1 may be configured such that the terminal covers 1 serving as one unit are provided without providing a gap, and a slit for folding is provided at a substantially central portion.

FIG. 3 is a perspective view of the terminal cover for explaining the terminal cover of the third embodiment of the present invention.

In the figure, 13 is a terminal cover, 23 is a wire insertion hole insertion portion to be inserted into the wire insertion hole, and 33 is a detection hole closing portion for closing the detection hole. Reference numeral 43 denotes a hooking and fastening portion that is hooked or inserted into a wire connection display hole (described later) provided in the circuit breaker.
The terminal cover 13 protrudes into a pressing surface 63 provided so as to be pressed toward the wire insertion hole when the terminal cover 13 is mounted on the terminal portion of the circuit breaker, and a surface opposite to the pressing surface 63. The electric wire insertion hole insertion portion 23, the voltage detection hole closing portion 33, and the hooking portion 43 that are formed are integrally formed.

FIG. 8 shows an example of a circuit breaker having two poles. The circuit breaker 100 includes a body 1 constituting an outline of the circuit breaker, a power terminal portion 101 at one end in the longitudinal direction of the body 1 and a load terminal portion 102 at the other end, The load terminal portion 102 is provided with a quick-connecting terminal formed of a terminal plate and a chain spring that are crimped and held by inserting an electric wire into the container and connected to the electric wire. The wire body is provided with an electric wire insertion hole 103 for inserting an electric wire toward the quick connection terminal, and an electric wire connection display hole provided for confirming that the electric wire is connected from the outside of the device body 1 105, and the body 1 is provided with a detection hole 104 for measuring the insulation of the load side wiring of the circuit breaker from the outside of the body 1.

The terminal cover 13 is provided with a substantially stepped outer shape from the pressing portion 63 to the hooking and stopping portion 43 at the end, and the stepped portion is the load terminal portion 102 of the circuit breaker 100. The shape is matched to the shape of the step from the wire insertion hole 103 to the wire connection display hole 105.

FIG. 4 is a perspective view of the terminal cover for explaining the terminal cover of the fourth embodiment of the present invention.

In the present embodiment, as in the second embodiment described above, an example of a terminal cover that assumes a case where the number of poles of the circuit breaker is two is shown. In the figure, 14 is a terminal cover, 24 is a wire insertion hole insertion portion inserted into the first pole, 241 is a wire insertion hole insertion portion inserted into the second pole, and 34 is the same as the first pole. A detection hole blocking portion for closing the detection hole on the side, 341 is a detection hole blocking portion for closing the detection hole on the same side as the second pole, and 44 is on the same side as the first pole. A hook stopper 441 hooked or inserted into the wire connection display hole, 441 is a hook stopper hooked or inserted into the wire connection display hole on the same side as the second pole.

The terminal cover 14 is formed by integrally forming a wire insertion hole insertion portion, a detection hole closing portion, and a hooking portion provided as many as the number of poles of the circuit breaker. When the terminal cover 13 is a unit, the two terminal covers 13 are arranged side by side through a dividing means.

The dividing means 54 connects the terminal covers 13 as one unit. When dividing, the dividing means is used by cutting or breaking the dividing means. Note that the terminal cover 14 may be configured by arranging the terminal covers 13 as one unit without providing a gap and providing a slit for folding at a substantially central portion.

FIG. 5 is a perspective view of the terminal cover for explaining the terminal cover of the fifth embodiment of the present invention.

In the figure, reference numeral 15 denotes a terminal cover, but the terminal cover 15 shown in the present embodiment connects the tip end portion of the wire insertion hole insertion portion 23 in the terminal cover 13 shown in FIG. The quick connection terminal connection part 75 extended to such an extent is provided.

When the quick connection terminal connection portion 75 is inserted into the wire insertion hole 103, the quick connection terminal connection portion 75 is inserted so as to push down the chain spring, and is crimped to the terminal plate by the chain spring. Retained.

FIG. 6 is a perspective view of the terminal cover for explaining the terminal cover of the sixth embodiment of the present invention. FIG. 7 is a perspective view of the terminal cover of the sixth embodiment viewed from the pressing surface 66 side.

In the figure, reference numeral 16 denotes a terminal cover. However, the terminal cover 16 shown in the present embodiment is configured so that the tip ends of the wire insertion hole insertion portions 24 and 241 in the terminal cover 14 shown in FIG. The quick connection terminal connection portions 76 and 761 extended to the extent that they are connected to the terminal are provided.

When the quick connection terminal connecting portions 76 and 761 are respectively inserted into the corresponding wire insertion holes, the quick connection terminal connecting portions 76 and 761 are inserted so as to push down the chain spring, and the terminal is held by the chain spring. It is connected and held so as to be crimped to the plate.

Further, a dividing unit 56 is provided. Like the dividing unit 54 described above, when dividing, the dividing unit is cut or broken. Note that the terminal cover 15 may be configured by arranging the terminal covers 15 as one unit without providing a gap and by providing a slit for folding at a substantially central portion. In particular, the mass productivity can be further improved, for example, when a terminal cover is prepared for multiple poles at once by providing a dividing means.

FIG. 9 shows a view in which the terminal cover 16 is attached to the circuit breaker 10.

First, when attaching the terminal cover 16 to the circuit breaker 10, the terminal cover 16 is first inserted into the wire insertion hole 103 of the circuit breaker 10 by inserting the wire insertion hole insertion portion 26 into the circuit breaker 10. 16 is roughly held and positioned. Subsequently, the terminal cover can be attached to the circuit breaker in a snap manner by disposing the detection hole closing portion 46 so as to close the detection hole 104 of the circuit breaker.

When removing the terminal cover 16 from the circuit breaker 10, the vicinity of the detection hole closing portion 36 of the terminal cover 16 is first lifted, and then the wire insertion hole insertion portion is quickly pulled out from the wire insertion hole. It can be removed.

As described above, since the terminal cover of the present invention has a wire insertion hole insertion portion that is press-fitted into or inserted into the wire insertion hole, the terminal of the circuit breaker having a quick connection terminal structure In addition to use as a cover, the load-side terminal of the circuit breaker is temporarily provided by providing the quick-connection terminal connection portions 75, 76, and 761 with the same thickness as the wires that are originally connected to the quick-connection terminal. When it is attached to the part, it cannot be pulled out easily unless the release button is operated, so that there is a possibility that it can be used as a wire insertion prevention cover that makes it difficult to remove.

It is the external view which showed the terminal cover of 1st embodiment of this invention. It is the external view which showed the terminal cover of 2nd embodiment of this invention. It is the external view which showed the terminal cover of 3rd embodiment of this invention. It is the external view which showed the terminal cover of 4th embodiment of this invention. It is the external view which showed the terminal cover of 5th embodiment of this invention. It is the external view which showed the terminal cover of 6th embodiment of this invention. It is the external view which showed the terminal cover of 6th embodiment. It is the external view which showed the circuit breaker. It is the figure which showed attachment of the terminal cover to a circuit breaker. It is a figure explaining background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal cover 2 Electric wire insertion hole insertion part 33 Electric detection hole blockage part 43 Hook-and-hold part 52 Dividing means 10 Circuit breaker 100 Body 101 Power supply terminal part 102 Load terminal part 103 Electric wire insertion hole 104 Electric detection hole part 105 Wire connection display hole

Claims (1)

A quick-connecting terminal comprising a terminal plate and a chain spring connected to the electric wire by crimping and holding the inserted electric wire by inserting the electric wire into the body, and
A quick connection terminal portion provided with an electric wire insertion hole for inserting an electric wire into the container body toward the quick connection terminal;
A hole for electric detection for measuring insulation of the load side wiring from the outside of the body ,
Wire connection indicator hole to confirm that the wire is connected from the outside of the body
A terminal cover to be attached to the quick connection terminal portion of the circuit breaker provided with
A wire insertion hole inserting portion to be press-fitted into the wire insertion hole of the circuit breaker,
A detection hole closing portion for closing the detection hole portion ;
Terminal cover, characterized in that formed integrally includes <br/> a hooking catch, which is hooked to the wire connecting display aperture.

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