JP4564643B2 - Single-phase three-wire distribution board voltage switching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single-phase three-wire distribution board, and more particularly to a voltage switching device for the branch breaker.
[0002]
[Prior art]
Conventionally, there has been a voltage switching device for a branch breaker as shown in FIG. In FIG. 1, 11 is a first voltage phase conductor, 12 is a neutral phase conductor, and 13 is a second voltage phase conductor. 14 and 15 are branch breakers, 16 and 20 are feed plates, 17 is a screw, 18 is a cylindrical conductor, and 19 is a female screw member. Reference numeral 1101 denotes a connection portion extending from the first voltage phase conductor 11 and connected to the terminal 1402 of the branch breaker 14. Note that the terminals of the branch breaker in the figure are set as plug-ins that connect the conductors by elastic pinching. The sixteen feed plates have a connection portion 1601 and a long hole 1602, and the connection portion 1601 is connected to the terminal 1401 of the branch breaker 14. Reference numerals 1202 and 1303 denote U-shaped notches of the neutral phase conductor and the second voltage phase conductor, respectively including cylindrical conductor connecting surface portions like 1201 and 1302, and the ends of the long holes 1602 of the feed plate 16. The U-shaped opening of each U-shaped notch is arranged so as to face inward. The screw 17 and the female screw member 19 select the cylindrical conductor 18 between the feed plate 16 and the U-shaped notch 1202 or 1303 and fasten it in a pressure contact manner. When 1202 is selected, a voltage is supplied to the branch breaker 14 from the first voltage phase conductor 11 and the neutral phase conductor 12 to 100V. When 1303 is selected, a voltage is supplied from the first voltage phase conductor 11 and the second voltage phase conductor 13 to 200V. The 15 branch breakers are also supplied with voltages from the connection portions 1301 and 2001, and the voltage switching is the same as in the case of the 14 breakers.
[0003]
FIG. 2 is a diagram showing the state in section, and shows the feed plate 20 connected to the branch breaker 15 of FIG. In FIG. 2, reference numeral 21 denotes an insulating member, which is not shown in FIG. 1, but ensures the support of the feed plate, the cylindrical conductor, and other constituent members of FIG. In FIG. 1, the breaker 15 is connected to a connection part 2001 of the feed plate 20 and a connection part 1301 of the second voltage phase conductor 13 and supplied with a voltage. FIG. 2 shows a state in which the feed plate 20 is connected to the U-shaped notch 1204 of the neutral phase conductor 12 by the cylindrical conductor 18.
[0004]
[Problems to be solved by the invention]
In the voltage switching device of the conventional single-phase three-wire distribution board as described above, when the voltage is switched, the screw 17 is loosened and the cylindrical conductor 18 and the female screw member 19 are moved from one end to the other in the long hole. The voltage can be easily switched by simply tightening the screw again.
[0005]
However, since the distribution board is usually mounted so that the bottom of the breaker of FIG. If the tip of the driver is moved away from the screw when moved, the screw, the cylindrical conductor, and the female screw member easily fall below the long hole. In addition, since the screw can move freely in the long hole of the feed plate, the positioning when tightening the screw is not clear, and the screw is placed with the cylindrical conductor and the female screw member in contact with the U-shaped notch at the halfway end. There was a possibility that the contact by screw tightening could be incomplete.
[0006]
In the voltage switching device of the conventional example as shown in FIG. 1, the screw is moved when the screw is moved above the slot and the tip of the driver is separated from the screw with the distribution board attached to the wall. The cylindrical conductor and female screw member do not easily fall below the long hole, the positioning when tightening the screw is clear, and the cylindrical conductor and female screw member are in contact with the U-shaped notch halfway The object is to provide a voltage switching device that can be completely contacted by screw tightening.
[0007]
[Means for Solving the Problems]
Accordingly, the present invention provides a branch breaker of a single-phase three-wire distribution board including a main breaker, a plurality of two-pole branch breakers, and a conductor device that electrically connects the main breaker to a plurality of two-pole branch breakers. In the voltage switching device for switching the supply voltage to the branch breaker by switching the conductor phase connected to one of the poles to the neutral phase and the voltage phase, the voltage switching device is connected to the terminal of the one pole of the branch breaker. A feed plate having a long hole, a neutral phase, first and second voltage phase conductors, a cylindrical conductor, and a long hole and a cylindrical conductor formed in the feed plate , a screw for selectively connecting the connecting portions of the conductors of the neutral phase or voltage phase Dotaiko, a female screw member to which the screw is connected and made of Nde containing, neutral phase voltage phase of the voltage switching unit The connecting portion of the conductor to the cylindrical conductor includes the cylindrical conductor connecting surface portion. A-shaped cut-out portion,
U-shaped openings of U-shaped cutouts are arranged inwardly at the ends of the long holes, respectively,
While the screw and the female screw member fasten the cylindrical conductor between the feed plate and each U-shaped notch at the end of the long hole of the feed plate,
When the screw is loosened, it is moved along with the cylindrical conductor and female screw in the long hole of the feed plate.
In the center of the feed plate slot,
When switching the U-shaped notch, it is possible to get over with the screw loosened,
When the distribution board is attached to the wall, a convex part is formed to prevent the screws and female screw members from falling off.
The present invention provides a voltage switching device for a single-phase three-wire distribution board characterized in that a position regulating portion is formed in which a position over the convex portion is a tightening position . As a result, the screw in the slot is moved over the obstacle in the center of the slot, so that the screw does not move easily. Is held in that position. Moreover, since the screw can be tightened in a state where the position is regulated by the obstacle in the end of the long hole, the contact does not become incomplete.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described below with reference to the drawings. 3 and 4 are explanatory diagrams of the voltage switching device according to the present invention and the first embodiment.
[0009]
In the figure, reference numerals 1603 and 2003 denote convex portions formed at substantially central portions of the long holes 1602 and 2002 of the feed plates 16 and 20. Portions indicated by reference numerals other than 1603 and 2003 are the same as those shown in FIGS. In FIG. 4, when the screw 17 is loosened and the connection of the cylindrical conductor 18 is switched to the U-shaped notch 1102 side, it is necessary to get over the convex part 2003, but it is possible if the screw is loosened moderately. . Once the screw 17 gets over the convex part 2003, even if the bottom face of the figure is vertical so that the first voltage phase conductor 11 of FIG. And does not fall easily. Further, since the position of the screw 17 is regulated at one end of the long hole 2002 by the convex portion 2003, the screw enters the U-shaped notch to the full depth, and the cylindrical conductor 18 and the U-shaped notched portion The screw can be tightened in a state in which the contact is reliable.
[0010]
FIGS. 5 and 6 show a second embodiment of the present invention in which the convex portions 1603 and 2003 in FIGS. 3 and 4 are replaced with the convex portions 1604 and 2004 which are inverted. 3 and the first example shown in FIG.
[0011]
【effect】
As described above, according to the present invention, in the conventional voltage switching device as shown in FIG. 1, when the screw is moved above the elongated hole and the tip of the driver is separated from the screw, the screw and the cylindrical conductor The female screw member does not easily fall below the long hole, the positioning when tightening the screw is clear, the cylindrical conductor and the female screw member do not contact the U-shaped notch partway, Therefore, it is possible to provide a voltage switching device that can complete the contact by.
[Brief description of the drawings]
FIG. 1 is a diagram of a voltage switching device of a conventional branch breaker.
FIG. 2 is a cross-sectional view of a conventional voltage switching device for a branch breaker.
FIG. 3 is a diagram of a voltage switching device according to a first embodiment of the present invention.
FIG. 4 is a cross-sectional view of a voltage switching device according to a first embodiment of the present invention.
FIG. 5 is a diagram of a voltage switching device according to a second embodiment of the present invention;
FIG. 6 is a cross-sectional view of a voltage switching device according to a second embodiment of the present invention.
[Explanation of symbols]
11 First Voltage Phase Conductor 12 Neutral Phase Conductor 13 Second Voltage Phase Conductor 16, 20 Feed Plate 1602, 2002 Long Hole 1603, 2003 Convex 1604, 2004 Convex 17 Screw 18 Cylindrical Conductor 19 Female thread member 21 Insulating member

Claims (1)

Connected to one pole of a branch breaker of a single-phase three-wire distribution board including a main breaker, a plurality of two-pole branch breakers, and a conductor device that electrically connects the main breaker and a plurality of two-pole branch breakers In the voltage switching device that switches the supply phase voltage to the branch breaker by switching the conductor phase to neutral phase and voltage phase,
The voltage switching device includes a feed plate connected to one terminal of the branch breaker and having a long hole, a neutral phase, first and second voltage phase conductors, a cylindrical conductor, and the feed A screw that penetrates the long hole formed in the plate and the cylindrical conductor, selectively connects the cylindrical conductor to the connection portion of the neutral phase or voltage phase conductor , and a female screw member to which the screw is connected It is made of Nde including,
The connection portion of the neutral phase and voltage phase conductor of the voltage switching portion to the cylindrical conductor is a U-shaped notch including the cylindrical conductor connection surface portion,
U-shaped openings of U-shaped cutouts are arranged inwardly at the ends of the long holes, respectively,
While the screw and the female screw member fasten the cylindrical conductor between the feed plate and each U-shaped notch at the end of the long hole of the feed plate,
When the screw is loosened, it is moved along with the cylindrical conductor and female screw in the long hole of the feed plate.
In the center of the feed plate slot,
When switching the U-shaped notch, it is possible to get over with the screw loosened,
When the distribution board is attached to the wall, a convex part is formed to prevent the screws and female screw members from falling off.
A voltage switching device for a single-phase three-wire distribution board characterized in that a position regulating portion is formed in which a position over the convex portion is a tightening position .

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