JPH0136303Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electric line branching device used in a switchboard, a control panel, etc.

(Prior Art) A conventional electrical circuit branching device includes a conductive bar 3 whose both ends are attached to bar holders 31, 31, as shown in FIG.
A bolt 3 is inserted from the back side into a through hole 33 provided in the conductive bar 32, and then a nut 35 is screwed together.A terminal such as an electric wire is held between the surface of the conductive bar 32 and the seat surface of the nut 35. By tightening the bolt 34 and nut 35, the conductive bar and the electric wire etc. are connected and fixed.

(Problem that the invention attempts to solve) However, in the case of such conventional ones,
To thread together a bolt and nut, the bolt must be held by hand or with a tool, which is a cumbersome task when many bolts and nuts are threaded together. If it is necessary to completely remove the nut from the bolt when connecting and fixing electric wires, etc., if you do not hold the bolt with your fingers, there will be problems such as the bolt falling as shown on the right side of Figure 3. be.

(Means for Solving the Problems) The present invention is intended to solve the above-mentioned problems, and consists of providing a plurality of through holes in a conductive bar attached between a pair of bar holders, and A bolt is fitted into the hole from the back side, and the head of the bolt is held in contact with a support plate attached to the back side of the conductive bar, and a rotation prevention part of the bolt is placed between the conductive bar or support plate and the bolt. The invention is characterized in that a nut for connecting an electric wire is screwed onto the bolt.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. In the first embodiment shown in FIG.
Reference numerals 1 and 1 denote a pair of bar holders disposed on the base 2 at a required interval, that is, at substantially the same interval as the length of a conductive bar 11 to be described later. The front part 5 of the base part 4 is formed to be inclined with respect to the mounting plate part 3, and bolts 6 are vertically provided on this front part 5, and a conductive bar 11 and a support plate 16, which will be described later, are connected to the base plate 3. To facilitate the screwing work of a bolt 14 and a nut 20, which will be described later as being inclined relative to each other. The bolt 6 is held in the bar holder 1 by fitting its head 7 into a recess 8 provided on the back side of the support base 4 and by screwing a locking nut 10 onto the shaft 9. 11 attaches both ends to bar holder 1, 1 with bolt 6
A conductive bar made of a copper plate is attached with a nut 12. A plurality of through holes 13 are provided in the conductive bar 11, and bolts 14 inserted from the back side of the conductive bar 11 are inserted into the through holes 13. It is fitted. Reference numeral 15 denotes a rotation preventing portion of the bolt 14 provided between the conductive bar 11 and the bolt 14. In this first embodiment, the through hole 13 provided in the conductive bar 11 is formed into a non-circular shape such as a square. The shaft end of the bolt 14 that fits into the through hole 13 is provided with a non-circular shape. Reference numeral 16 denotes a support plate for holding the head 17 of the bolt 14 in contact to prevent the bolt 14 from falling out of the through hole 13 of the conductive bar 11;
Attachment pieces 19, 19 are attached to the back surface of both ends of the conductive bar 11, which are bent at both ends through upright plate parts 18, 18 having approximately the same length as the height of the head 17 of the bolt 14. The conductive bar 11 is mounted on the bar holders 1, 1 with bolts 6 and nuts 12 in the same manner as the conductive bar 11. Reference numeral 20 denotes a nut for connecting electric wires which is screwed onto the bolt 14. The nut 20 is used to connect and fix the electric wires etc. to the conductive bar 11 by tightening the electric wires etc. held between the bearing surface and the surface of the conductive bar 11. . Reference numeral 21 denotes a circular through-hole provided in the support plate 16 in order to fit the top of the bolt 14 when the head 17 is round, thereby making the bolt 14 more securely held. Next, in the second embodiment shown in FIG.
This is provided between the bolt 14 and the bolt 14.
The head 17 of the head 17 is made non-circular, and a flange 17a is stretched around the front periphery of the head 17, and the back surface of the flange 17a is held in contact with the support plate 16, so that the bolt 17 is fitted into the support plate 16. A matching non-circular through hole 21 is formed, and the other configurations are the same as in the first embodiment.

(Function) With this structure, the terminal portion of the electric wire, etc. is held between the surface of the conductive bar 11 and the bearing surface of the nut 20, and the nut 20 is tightly screwed onto the bolt 6, so that a large number of electric wires, etc. The branching of the electric circuit by joining the conductive bar 11 to the conductive bar 11 is similar to the conventional electric circuit branching device of this type, but in the present invention, a pair of bar holders 1,
The bolt 14, which is fitted from the back side into the through hole 13 of the conductive bar 11 attached between 1 and 1, has its head 17 held in contact with the support plate 16 attached to the back side of the conductive bar 11, so that the electric wire Even if the nut 20 is completely removed from the bolt 14 when joining terminal parts such as The shaft end is also non-circular and the conductive bar 11
Since the rotation prevention part 15 of the bolt 14 is provided between the bolt 14 and the bolt 14, the rotation of the bolt 14 is prevented.
There is also the advantage that the tightening work can be easily performed since there is no need to use tools to fix the parts. Moreover,
When attaching both ends of the conductive bar 11 to the bar holders 1, 1, this kind of thing is done by fitting the bolts 14 into the through holes 13 provided in the conductive bar 11 with the back side of the conductive bar 11 facing upward. If the support plate 16 with the back side facing upward is attached, the bolt 14
is held by the support plate 16 and will not come off even if the direction of the conductive bar 11 is changed, so it can be assembled extremely easily even if a large number of bolts 14 are required. .

(Effects of the invention) As is clear from the above explanation, the invention has the following effects:
The wire connection bolt fitted into the through hole of the conductive bar does not separate from the conductive bar even when the nut is removed, and the bolt does not rotate relative to the conductive bar, making it easy to screw the nut together. This made it extremely easy to connect wires, etc. to the conductive bar. Therefore, the present invention has extremely great practical value as it eliminates the problems of conventional electrical circuit branching devices.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing the first embodiment of the present invention, Fig. 2 is a partially cutaway side view showing the main parts of the second embodiment, and Fig. 3 is a conventional electrical circuit branching device. It is a partially cutaway plan view showing a representative example. 1... Bar holder, 11... Conductive bar, 13
... Through hole, 14 ... Bolt, 15 ... Rotation prevention part, 16 ... Support plate, 17 ... Head, 20 ... Nut.

Claims (1)

[Scope of utility model registration request] A plurality of through holes 13 are arranged in the conductive bar 11 attached between a pair of bar holders 1, 1, and the through holes 13
Fit the bolt 14 from the back side, and then
4 is held in contact with the support plate 16 attached to the back surface of the conductive bar 11, and the bolt 14 is held between the conductive bar 11 or the support plate 16 and the bolt 14.
An electrical circuit branching device characterized in that a rotation blocking portion 15 is provided, and a nut 20 for connecting an electric wire is screwed onto the bolt 14.