JP7075798B2 - Molded case circuit breaker - Google Patents

Description

The present invention relates to a molded case circuit breaker installed in, for example, a distribution board.

Conventionally, as a molded case circuit breaker aiming at thinning, a notch portion constituting a power supply side terminal is provided on the rear surface of the main body case, and a quick connecting terminal constituting a load side terminal is provided on the front surface in a row above and below. be. In addition, an insertion hole for inserting the measurement terminal for carrying out the insulation resistance measurement test shall be provided on the front surface of the main body case of such a molded case circuit breaker and at a position near each quick connection terminal. Some of them have been made even thinner (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2007-287581

However, in the molded case circuit breaker as described in Patent Document 1, when the load wiring is connected to the quick connection terminal, there is a problem that the insertion hole is difficult to see and it is difficult to carry out the insulation resistance measurement test. rice field.

Therefore, the present invention has been made in view of the above problems, and provides a molded case circuit breaker capable of easily performing an insulation resistance measurement test even when a load wiring is connected to a quick connection terminal. It is something to try.

In order to achieve the above object, in the invention according to claim 1 of the present invention, a power supply side terminal is provided on the back surface of the main body case, a load side terminal is provided on the front surface, and the load side terminal is provided. , It consists of a plurality of quick-connect terminals arranged in a row in the vertical direction along the front surface of the main body case, and further, adjacent to either the top or bottom of each quick-connect terminal, there is an insertion hole into which a measurement terminal can be inserted. It is a molded case circuit breaker that is provided with a support wall that protrudes forward along the left and right side edges of the front surface of the main body case, and the insertion hole and / Alternatively, the cover member that covers / exposes the quick-connect terminal is slidably attached in the vertical direction along the front surface of the main body case, while at least one of the left and right support walls of each of the insertion holes. It is characterized in that notches are provided at the positions on the sides.
Further, in the invention according to claim 2, in the invention according to claim 1, a guide step portion is provided on the front surface of the main body case so as to step backward from the notch toward the inside of the insertion hole. It is characterized by being.
In the present invention, "arranging a plurality of quick-connect terminals in a row in the vertical direction along the front surface of the main body case" means that when the front surface of the main body case is formed on an inclined surface, it is in the inclined direction. It also includes arranging in a row along parallel diagonal directions. Further, "a support wall protruding forward is provided along the left and right side edges of the front surface of the main body case" means that when the front surface of the main body case is formed into an inclined surface, it is orthogonal to the inclined surface. It also includes providing a support wall so as to project diagonally forward in the direction of the sill.

According to the present invention, notches are provided at least one of the support walls provided along the left and right side edges of the front surface of the main body case at positions lateral to each insertion hole. Therefore, even when the load wiring is connected to the quick connection terminal and the position of the insertion hole is difficult to see directly, the position of the insertion hole can be easily grasped from the position of the notch. Further, the measurement terminal can be positioned in front of the insertion hole only by moving the tip of the measurement terminal in the left-right direction from the position where the notch is provided. Therefore, various tests such as an insulation resistance measurement test can be easily performed.
Further, according to the second aspect of the present invention, a guide step portion is provided on the front surface of the main body case so as to step backward from the notch toward the inside of the insertion hole. Therefore, the measurement terminal can be brought into contact with the power supply seat by simply moving the measurement terminal in the left-right direction while the tip of the measurement terminal is in contact with the guide stage, and various tests can be performed very easily. In addition, a sufficient insulation distance can be secured from the inside of the insertion hole to the notch.

It is a perspective explanatory view which showed the appearance of the molded case circuit breaker from the front side and the left side. It is explanatory drawing which showed the molded case circuit breaker from the right side. It is explanatory drawing which showed the molded case circuit breaker from the front side. It is a perspective explanatory view which showed the internal structure of the load side terminal part in a molded case circuit breaker.

Hereinafter, a molded case circuit breaker (hereinafter, simply referred to as a circuit breaker) according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective explanatory view showing the appearance of the circuit breaker 1 from the front side and the left side. FIG. 2 is an explanatory view showing the circuit breaker 1 from the right side. FIG. 3 is an explanatory view showing the circuit breaker 1 from the front side. FIG. 4 is a perspective explanatory view showing the internal structure of the load side terminal 3 portion in the circuit breaker 1. The load side terminal 3 side of the circuit breaker 1 is the front side of the circuit breaker 1. Further, in FIG. 4, the cutoff mechanism portion and the electric line for electrically connecting the load side terminal 3 and the power supply side terminal 2 are omitted.

The circuit breaker 1 has a main body case 4 formed by assembling a pair of left and right case members made of synthetic resin, and a handle 7 is provided on the upper surface of the main body case 4 so as to be rotatable in the front-rear direction. .. Then, by rotating the handle 7, a cutoff mechanism unit (not shown) incorporated in the main body case 4 is activated, and an electric line for electrically connecting the power supply side terminal 2 and the load side terminal 3 described later is connected. / It is designed to be opened. Further, a set of hooking pieces (front hooking piece 8 and rear hooking piece 9) for hooking to a mounting panel (not shown) are provided on the bottom of the main body case 4, and the hooking piece 9 is provided on the mounting panel. A lock member 10 for locking while in the hooked state is also provided. An overcurrent detection mechanism (not shown) is also provided in the main body case 4, and when an overcurrent is detected, the cutoff mechanism portion is opened.

Further, on the rear surface of the main body case 4, a power supply side terminal 2 having plug-in type terminals P1, P2, and P3 provided in a row in the vertical direction is arranged. Each terminal P1 to P3 is formed by cutting out a U-shape penetrating the main body case 4 in the left-right direction, and is a conductor bar (not shown) which is a power supply line arranged in a distribution board or the like. A branch bar (not shown) branched from the conductor bar can be easily inserted and connected.

On the other hand, the front surface of the main body case 4 is formed on an inclined surface that inclines downward toward the front side, and three terminals L1, L2, and L3 into which load wiring (not shown) can be inserted and connected to the inclined surface. The load side terminals 3 are arranged in a row along the inclined surface. Further, each of the terminals L1 to L3 is provided with a terminal hole 11 formed on an inclined surface, and the load wiring can be inserted into the main body case 4 in a direction orthogonal to the inclined surface via the terminal hole 11. There is. Further, a quick-connecting terminal fitting 15 that comes into contact with the inserted load wiring is installed at a position inside the terminal hole 11 in the main body case 4, and each terminal L1 to L3 functions as a so-called quick-connecting terminal. It is designed to do.

Further, below each terminal L1 to L3, an insertion hole 16 into which a measurement terminal of various instruments for performing an insulation resistance measurement test or the like can be inserted is provided. In each of the insertion holes 16, the power supply seats 17 in contact with the quick-connect terminal fittings 15 of the terminals L1, L2, and L3 located directly above the insertion holes 16 are exposed. Then, by inserting the measurement terminals of various instruments through the insertion holes 16 and bringing them into contact with the power supply seat 17, it is possible to carry out an insulation resistance measurement test or the like.

Further, on the front surface of the main body case 4, support walls 5 and 5 are provided along the left and right edges thereof and standing upright in the direction perpendicular to the inclined surface. Further, an engaging groove 6 is extended along the inclined direction on the inner surface of the base end of the support walls 5 and 5. A cover member 12 for covering / exposing the insertion holes 16, 16 ... Is slidably supported in the engaging groove 6 in the inclined direction. Reference numeral 21 is a knob for the cover member 12, and reference numeral 22 is a guide protrusion provided on the cover member 12. Further, on the side surface of the main body case 4, a guide slit 23 extending along the inclination direction of the front surface of the main body case 4 is provided. The guide projection 22 is inserted into the guide slit 23 to guide the cover member 12 when the cover member 12 is slid.

In addition, notches 31 are provided in one of the support walls 5 (here, the support wall 5 on the right side when viewed from the front) at positions on the sides of the insertion holes 16. Further, from each notch 31 toward the power supply seat 17 exposed in each insertion hole 16, a guide step portion 32 formed in a step shape that descends rearward is provided.

Then, when the insulation resistance measurement test or the like is carried out in the circuit breaker 1 as described above, the side of the insertion hole 16 corresponding to the terminals L1 to L3 to which the test is to be executed is used as a mark of the notches 31, 31 ... Position the tip of the measurement terminal toward you. Then, the tip of the measurement terminal is moved to the left side, moved on the front surface of the main body case 4 (in front of the insertion hole 16) through the notch 31, and the tip of the measurement terminal is brought into contact with the guide step portion 32. If it is further moved to the left side while being moved, it can be brought into contact with the power supply seat 17, and various tests can be carried out.

According to the circuit breaker 1 having the above configuration, the support walls 5 and 5 that stand upright in the direction perpendicular to the inclined surface are provided along the left and right side edges of the front surface of the main body case 4, and the right side is provided. Notches 31 are provided on the support wall 5 and at positions on the right side of each insertion hole 16, respectively. Therefore, when conducting an insulation resistance measurement test or the like, even if the load wiring is connected to the terminals L1 to L3 and the positions of the insertion holes 16, 16 ... Are difficult to directly see, the notch 31 is used. , 31 ... Can be easily grasped as a mark of the insertion hole 16. Further, if the tip of the measuring terminal is positioned on the side of the insertion hole 16 corresponding to the terminals L1 to L3 to be tested and moved to the left as it is, the tip of the measuring terminal is positioned in front of the insertion hole 16. Can be made to. Therefore, various tests such as an insulation resistance measurement test can be easily performed.

Further, from each notch 31 toward the power supply seat 17 exposed in each insertion hole 16, a guide step portion 32 formed in a staircase shape that descends rearward is provided. Therefore, the tip of the measurement terminal moved to the front side of the main body case 4 through the notch 31 can be brought into contact with the power supply seat 17 only by moving it to the left side while making it abut on the guide step portion 32. As a result, various tests can be carried out. Therefore, various tests such as an insulation resistance measurement test can be performed very easily, and a sufficient insulation distance can be secured from the power supply seat 17 to the notch 31.

The configuration of the circuit breaker of the present invention is not limited to the embodiment of the above embodiment, and the present invention includes not only the overall configuration of the circuit breaker but also the configuration of the notch, the guide step portion, and the like. It can be changed as necessary without departing from the spirit of the invention.

For example, in the above embodiment, the notch is provided on the right support wall, but the notch may be provided on the left support wall, and the upper and lower insertion holes may be provided on the right support wall and the inside. For the holes, it is also possible to adopt a configuration in which notches are provided on both the left and right support walls, such as the support wall on the left side.
Further, in the above embodiment, the insertion hole is provided below each quick-connect terminal, but there is no problem even if the insertion hole is provided above.
Further, in the above embodiment, the cover member that covers / exposes the insertion hole is provided, but instead, it is possible to provide a cover member that covers the unused quick-connect terminal. There is no problem even if both the cover member for the insertion hole and the cover member for the quick connection terminal are provided.

1 ... Circuit breaker, 2 ... Power supply side terminal, 3 ... Load side terminal, 4 ... Main body case, 5 ... Support wall, 11 ... Terminal hole (quick connection terminal), 12 ... Cover member, 15・ ・ Quick connection terminal metal fittings (quick connection terminal), 16 ・ ・ Insert hole, 17 ・ ・ Power seat, 31 ・ ・ Notch, 32 ・ ・ Guide stage.

Claims (2)

A power supply side terminal is arranged on the back surface of the main body case, and a load side terminal is arranged on the front surface, and the load side terminals are arranged in a row in the vertical direction along the front surface of the main body case. A molded case circuit breaker that consists of terminals and has an insertion hole to which a measurement terminal can be inserted, adjacent to either the top or bottom of each quick-connect terminal.
A support wall protruding forward is provided along the left and right side edges of the front surface of the main body case, and the support wall is provided.
A cover member that covers / exposes the insertion hole and / or the quick-connect terminal is slidably attached in the vertical direction along the front surface of the main body case between the support walls.
A molded case circuit breaker characterized in that notches are provided on at least one of the left and right support walls at positions on the sides of the insertion holes. The molded case circuit breaker according to claim 1, wherein a guide step portion is provided on the front surface of the main body case so as to step backward from the notch toward the inside of the insertion hole.

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