JP2522194Y2 - Connection structure of main line bars in the panel - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application field] The present invention relates to a main bar of a neutral wire,
The present invention relates to a connection structure of a main line bar in a panel for connecting a branch bar in which a plurality of switches for neutral wires are arranged.

[0002]

2. Description of the Related Art Conventionally, in a panel such as a distribution board used for an electric circuit having a neutral wire such as a single-phase three-wire wire, a neutral wire switch is connected to the neutral wire. For example, in the distribution board 20, FIG.
As shown in FIG. 2, a pair of left and right mounting angles 21 is provided, and between both mounting angles 21, a mounting plate 23 to which a main breaker 22 is mounted, and a plurality of branch breakers 2.
4 and a mounting plate 26 to which a neutral wire switch 25 is mounted. Main breaker 22 is single phase 3
For the wire, the load side terminal of the main breaker 22 has 3
The main bars 27a to 27c of the book are connected. Branch breakers 24 are connected to the main trunk bars 27a and 27c at important points via branch bars 28. A branch bar 29 (see FIG. 1) is connected to the lower end of the main trunk bar 27b, which is a neutral wire.
Are arranged. Accordingly, if the load is connected between the branch breaker 24 and the neutral switch 25 as appropriate, the power can be supplied to the load via the branch breaker 24.

[0003] By the way, the branch bar 29 is a main bar 27b.
After the main bar 27b is superimposed on the branch bar 29, the main bar 2
7b and the branch bar 29 are electrically and mechanically coupled to each other. Further, since a plurality of neutral wire switches 25 are arranged on the branch bar 29, the spacer 1 is attached to the branch bar 29 in order to secure a space for connecting the main bar 27b to the branch bar 29. . That is, the neutral wire switch 25 is slidably mounted in the longitudinal direction of the branch bar 29,
The neutral wire switch 25 is fixed between the fixture 9 arranged at both ends of the branch bar 29 and fixed to the mounting plate 26 and the spacer 1 fixed to the center of the branch bar 29. It is done.

[0004]

In the above construction, the main bars 27a to 27c and the branch bars 28, 29 are usually made of copper because a large current flows, and the spacer 1 secures strength. Therefore, it is usually formed of iron or the like. Therefore, at the connecting portion between the main bar 27b and the branch bar 29, the main bar 27b and the spacer 1 are connected so as to sandwich the main bar 27b between them so that the main bar 27b and the branch bar 29 are in direct contact. There must be.

However, the conventional spacer 1 has no means for inhibiting the main bar 27b from being located on the side opposite to the branch bar 29, so that the space between the main bar 27b and the branch bar 29 is not provided. In some cases, such an erroneous construction causes a problem that the electrical resistance at the connection between the main bar 27b and the branch bar 29 increases to generate heat.

An object of the present invention is to solve the above-mentioned problem, and a spacer arranged at a connecting portion between a main bar and a branch bar of a neutral wire is interposed between the main bar and the branch bar. It is an object of the present invention to provide a connection structure of a main line bar in a panel which can prevent such erroneous construction.

[0007]

According to the present invention, in order to achieve the above-mentioned object, an electric power is provided in such a manner that one end of the main bar is overlapped with a branch bar arranged substantially perpendicular to the main bar of the neutral wire. And a plurality of switches for neutral wires are arranged in the longitudinal direction of the branch bar, and a spacer is inserted between a pair of switches for neutral wires adjacent to each other at a connection portion of the main bar to the branch bar. In the connection structure of the main line bar in the panel in which the spacer is fixed to the branch bar with the main bar sandwiched between the branch bar and the spacer, the spacer comes into contact with the side surface of each neutral wire switch and It has a pair of abutment surfaces that keep the distance between the switches for the neutral conductor so that the main bar can be inserted,
A mounting prohibition piece is provided on the surface of the spacer to prevent the main bar from overlapping the branch bar on the side opposite to the spacer.

[0008]

According to the above construction, the mounting bar is provided upright on the surface of the spacer to prevent the main bar from overlapping the branch bar on the opposite side, so that the main bar is sandwiched by the spacer. When it is located on the opposite side of the branch bar, it is in a state of being lifted up from the spacer by the placement prohibiting piece, and it is immediately known that such construction is inconvenient. As a result, it is possible to prevent erroneous construction such as performing construction with a spacer interposed between the main bar and the branch bar.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
The spacer 1 is provided at the connection between the and the branch bar 29.
The main bar 27b is sandwiched between the branch bar 29 and the spacer 1. The spacer 1, the main bar 27b, and the branch bar 29 are connected by a fixing screw 8 inserted through the spacer 1. A plurality of neutral wire switches 25 are arranged on the branch bar 29.
The neutral wire switch 25 arranged at the center of the switch 9 at the position where the main bar 27b is connected is spaced apart via the spacer 1. That is, the spacer 1 is interposed between the adjacent neutral conductor switches 25 in order to secure a gap for introducing the main bar 27b.

As shown in FIG. 1, the spacer 1 is formed by bending a sheet metal, and includes a pair of contact pieces 2 that contact the side surfaces of the respective neutral wire switches 25 to be separated. The outer surface of the contact piece 2 becomes the contact surface. Further, the spacer 1 corresponding to the distal end side in the longitudinal direction of the main bar 27b.
The terminal strip 3 is extended through the step 5 at the edge of the terminal piece 3. A terminal screw 6 is screwed into the terminal strip 3, and an open phase detection wire 7 for detecting an open phase is connected to the terminal strip 3. The other end of the phase loss detection line 7 is connected to a phase loss detection circuit of the main breaker 22 and the like. By the way, the spacer 1 has a placement preventing piece 4 erected at an end edge of the main trunk bar 27b opposite to the terminal piece 3 in the longitudinal direction. By providing such a placement preventing piece 4, when the main bar 27b is placed on the placement preventing piece 4, the main bar 27b rises from the spacer 1 and the positional relationship of the main bar 27b is incorrect. This can be easily understood, and the main bar 27b can be prevented from being positioned on the opposite side of the branch bar 29 with respect to the spacer 1. Here, if the sheet metal forming the spacer 1 is made thicker, the peripheral surface of the spacer 1 can be used as the contact surface without providing the contact piece 2.

By the way, the switch for neutral conductor 25 is configured as follows. That is, as shown in FIGS. 3 and 4, the body 10 has a body 10 formed of an insulating material such as a thermosetting synthetic resin. And a flat cover 12 that covers the opening surface. Body 11 and cover 12
Is fixed by a pair of fixing studs 13.

A recess 14 is formed in a rear portion (right portion in FIG. 3) of the body 10 and is open on the rear surface and both side surfaces. The rear surface of the recess 14 is integral with the body 10. Cover plate 15
Covered with. The connecting portion of the cover plate 15 with the body 10 is formed relatively thin so that the cover plate 15 can be easily removed from the body 10. A branch bar 29 is inserted into the recess 14, and the branch bar 29 is connected to the bottom surface of the recess 14 and the cover plate 15.
Is sandwiched between. On both sides of the recess 14 in the width direction (vertical direction in FIG. 3) of the branch bar 29, there are formed introduction grooves 16 which are opened on the rear surface of the body 11, and each introduction groove 16 is branched. Each pair of engagement grooves 17
a and 17b are formed.

A handle insertion window 18 through which a lever portion 31 of a handle 30 is exposed is formed on the front surface of the body 10, and an upper peripheral surface of the handle insertion window 18 projects forward from the handle insertion window 18 and has a leading edge. It has a projection 18a. The upper peripheral surface of the handle insertion window 18 is inclined upward and rearward. The front surface of the container body 1 above the handle insertion window 18 forms an inclined surface 19 that is inclined rearward toward the top, and the inclined surface 19 has a nameplate receiver 19a on which a nameplate can be mounted. I have.

The handle 30 has a lever portion 31 protruding from the handle insertion window 18 and a cam portion 32 continuous with the lever portion 31 and is formed in a substantially J-shape. A shaft hole 33 is formed at the connecting point of. A turning shaft 34 protruding from the inner peripheral surface of the body 11 is inserted into the shaft hole 33, and the handle 3 is connected to the turning shaft 34.
Around the center. That is, the lever part 31 is
Is vertically movable between a state of projecting substantially perpendicular to the front surface of the body 10 and a state of falling down along the front surface of the body 10. On the outer surface of the connecting portion between the lever portion 31 and the cam portion 32, a locking protrusion 35 is provided so as to protrude. When the lever portion 31 is in a collapsed state, the locking protrusion 35 is provided on the upper peripheral surface of the handle insertion window 18. Engages with the locking recess 36 formed in the
The handle 3 is locked. Handle 3
The 0 cam portion 32 presses the operation piece 41 of the movable contact 40 when the lever portion 31 is raised. In addition, lever part 3
On the outer surface of the device 1 and on the part which enters the handle insertion window 18 when the lever portion 31 is raised, a character 37 indicating an ON state is written. Is to be exposed. The character 38 indicating the OFF state is the front surface of the body 10 and the lever 3
1 is exposed when the user raises 1 and is covered by the lever 31 when the lever 31 is tilted.

The movable contact 4 has a substantially rectangular shape in which an operation piece 41 and a contact piece 42 separated from and brought into contact with the branch bar 29 are formed, and a pivot hole 43 is formed near the vertex. The contact piece 42 is urged toward the conductive bar 2 by a contact pressure spring 44 mounted between the contact piece 42 and the inner peripheral surface of the body 10. A fulcrum projection 5 protruding from the tip of a terminal piece 51 extending from the terminal 50 is provided in the pivot hole 43 of the movable contact 4.
2 is inserted, and the movable contact 40 swings around the fulcrum projection 52. Therefore, when the cam portion 32 of the handle 30 is not in contact with the operation piece 41,
When the tip of the contact piece 42 comes into contact with the branch bar 29 by the spring force of the contact pressure spring 44 and the operation piece 41 is pressed by the cam portion 32 of the handle 30, the contact piece 42 is moved to the branch bar 2.
Move away from 9. The switch mechanism is configured in this manner. The terminal 50 has a terminal fitting 53 continuous with the base of the terminal piece 51 and a terminal screw 5 screwed to the terminal fitting 53.
4, and the terminal screw 54 faces a jig insertion hole 55 opened on the front surface of the body 10. Also, the terminal 50
An electric wire introduction port 56 is opened in the body 10 below the container. Therefore, when an external electric wire is introduced through the electric wire introduction port 56, a driver is inserted from the jig insertion hole 55, and the terminal screw 54 is tightened, the external electric wire connected to the load side can be connected to the terminal 50. It is. Here, the jig insertion hole 55 is set to have a positional relationship such that the jig insertion hole 55 is covered by the lever portion 31 when the lever portion 31 of the handle 30 is tilted, so that foreign matter does not touch the terminal 50 when the jig insertion hole 55 is turned on. .

According to the above configuration, the body 10 can be attached to the branch bar 29 by inserting the branch bar 29 between the recess 14 and the cover plate 15. Further, by making the movable contact 40 pivotally supported by the terminal 50 and moving toward and away from the branch bar 29, a contact portion is formed between the branch bar 29 and the movable contact 40, and the branch bar 29 and the terminal 50 are connected to each other. Since the contact portion is formed only at one point between the contact pressures, the contact pressure is stably determined only by the spring force of the contact pressure spring 44, and the variation in operating characteristics among products is prevented. is there.

[0017]

According to the present invention, as described above, the mounting bar is provided upright on the surface of the spacer to prevent the main bar from overlapping the opposite side of the branch bar with respect to the spacer. When it is located on the opposite side of the branch bar with the spacer interposed therebetween, the placement prohibiting piece is in a state of being lifted from the spacer, so that it is immediately known that such construction is inconvenient. As a result, there is an advantage that erroneous construction, such as construction in which a spacer is interposed between the main bar and the branch bar, can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment.

FIG. 2 is a front view showing the embodiment.

FIG. 3 is a side view showing a state in which a cover of a neutral switch used in the embodiment is opened.

FIG. 4 is an exploded perspective view of a neutral wire switch used in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spacer 2 Contact piece 3 Terminal piece 4 Placement prohibition piece 25 Neutral wire switch 27b Main trunk bar 29 Branch bar

Claims (1)

(57) [Scope of request for utility model registration] 1. A branch bar arranged substantially perpendicular to a main bar of a neutral line and electrically connected to one another by overlapping one end of the main bar with a plurality of neutral bars in the longitudinal direction of the branch bar. Along with arranging the line switches, a spacer is inserted between a pair of neutral line switches adjacent to each other at the connection portion of the main bar to the branch bar, and the main bar is sandwiched between the branch bar and the spacer. In the connection structure of the main line bar in the panel where the spacer is fixed to the branch bar, the spacer comes into contact with the side surface of each neutral line switch so that the main bar can be inserted between both neutral line switches. A pair of abutting surfaces for maintaining the main bar, and a mounting prohibition piece for preventing a main bar from overlapping the opposite side of the branch bar with respect to the spacer is provided upright on the surface of the spacer. Connection structure for main bar.