JPH028363Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement of a grounding terminal block used for relaying a grounding line.

(Prior Art) The grounding resistance value of electrical equipment is determined by technical standards depending on conditions such as the type of equipment and the installation location. After grounding work or during periodic inspections of equipment, it is necessary to measure and confirm whether the ground resistance value conforms to the standard value. In order to facilitate this measurement, the grounding wires are gathered in one place and connected to the respective terminal blocks, and then grounded.

Terminal blocks used for the above purposes include:
Conventionally, there are devices shown in FIGS. 7 and 8, for example. In this structure, a pair of fixing bars 22 and 23 on the equipment side and the grounding side are arranged facing each other with an interval on a synthetic resin block 21, and a short-circuit is made between the two fixing bars 22 and 23 using a short-circuit bar 24. be.

(Problems to be solved by the invention) In the above-mentioned conventional grounding terminal block, a pair of fixed bars 22 and 23 on both sides and a short bar 2 between the two are provided.
4 are lined up in a row on a plane, making the whole thing long and requiring a large installation space.
Unlike other general terminal blocks, multiple terminal blocks cannot be installed side by side on a rail, so there is a problem in that the installation process is time-consuming.

This invention aims to solve the above-mentioned conventional problems and provide a grounding terminal block that does not require a large installation space and is easy to install.

(Means for Solving the Problems) In this invention, in order to solve the above-mentioned conventional problems, a synthetic resin block 1 having a fitting part 1a in the lower part that can be fitted to the terminal block mounting rail R is provided.
, the bottom sides 2a, 3a extend laterally longer than the top sides 2b, 3b, and each side 2a, 2 is bent in a U-shape.
b, 3a, 3b are made of highly conductive metal plates such as copper, aluminum, brass, etc., having screw holes 2c, 2d, 3c, 3d for screwing terminal fixing bolts, and are placed on the block 1 at intervals from each other. The device side terminal 2 and the ground side terminal 3 are fixed facing each other back to back, and the device side terminal 2 and the ground side terminal 3 can be stretched over the upper sides 2b and 3b of the device side terminal 2 and the ground side terminal 3, and both ends can be bolted. Change the direction by 90 degrees and connect the upper side 2 of the equipment side or ground side terminals 2 and 3 of another adjacent terminal block.
A grounding terminal block is constructed by providing a short bar 10 which can be spanned between the terminals b and 3b and one end of which can be bolted to the short bar 10.

(Function) A grounding terminal block to which this invention is applied is, for example, as shown in Fig. 6, in which multiple rows are installed on the terminal block mounting rail R, and a conductor connected to the device is connected to each terminal 1 on the device side. Then, a ground wire is connected to the ground side terminal 2 for use.

In this case, as shown in Figures 1 to 4, the rail R
In addition, by fitting the fitting portion 1a at the bottom of the block 1, a plurality of grounding terminal blocks can be easily attached in a short time.

In addition, the short bar 10 that shorts the U-shaped device side terminal 2 and the ground side terminal 3 is fixed to the top of the upper sides 2b and 3b of both terminals 2 and 3, so the connection becomes three-dimensional. By reducing the planar length of both ends of each terminal 2, 3, the overall installation space can be reduced.

(Example) The block 1 is made of synthetic resin, and has a fitting part 1a in the lower part that can be fitted to the terminal block mounting rail R, and has an insulating plate 1b in the middle part, and this insulating plate 1b There is an isolation part 1c at the center of the upper part of the
has.

The device side terminal 2 and the ground side terminal 3 are fixed to both sides of the insulating plate 1b back to back with screws 4 and 5, respectively, with the isolation part 1c in between.

The device side terminal 2 and the installation side terminal 3 are each made of a highly conductive metal plate material such as copper, aluminum, or brass bent in a U-shape, and the bottom sides 2a and 3a are longer than the top sides 2b and 3b and extend laterally. It is extending. The bottom sides 2a, 3a have screw holes 2c, 3c for screwing the terminal fixing bolts 6, 7, and the top sides 2b,
3b has screw holes 2d and 3d for screwing together bolts 8 and 9 for fixing the shot bar 10 described later. Then, both terminals 2 and 3 are connected with the bases 2a and 3a placed on the insulating plate 1b of the block 1, and the screws 4 and
It is fixed by 5.

As shown in FIG. 5, the shot bar 10 is made of a highly conductive metal plate, and has an oval hole 10a at one end.
On the other end side, cutouts 10b are formed from the sides in a direction perpendicular to the length direction. This shot bar 10 is placed so as to span over the upper sides 2b and 3b of the device side terminal 2 and the ground side terminal 3, and the oval hole 10a and notch 10b are aligned with the screw holes 2d and 3d, respectively, and the bolts are inserted. It is fixed at 8 and 9. This shoot bar 10
As shown by the imaginary line in Figure 2, the direction is changed by 90 degrees from the above case, and the device side of the other adjacent terminal block,
Alternatively, it can also be placed between the upper sides 2b and 3b of the ground side terminals 2 and 3.

A plurality of grounding terminal blocks configured as described above are mounted on the rail R in a row. A crimp terminal (not shown) at the end of a conductor connected to the device is connected to the device side terminal 2 with a bolt 6, and a crimp terminal (not shown) at the end of the ground wire is connected to the ground side terminal 3 with a bolt 7.

For example, a plurality of terminal blocks that are grounded in parallel are
As shown in Figure A, they can be arranged in parallel,
Connection can be made by appropriately changing the orientation of the shot bar 10 as shown in FIG. 6B.

Equipment side terminal 2 and ground side terminal 3 bent in a U-shape
The short bar 10 short-circuits both terminals 2 and 3.
Since it is fixed to the upper part of the upper sides 2b and 3b, the connection becomes three-dimensional, and the length of each terminal on the plane can be reduced, and the installation space as a whole can be reduced.

(Effects of the invention) As explained above, in this invention, the synthetic resin block 1 has a fitting part 1a at the lower part that can be fitted to the terminal block mounting rail R;
Each is bent in a U-shape, with the bottom sides 2a and 3a being the top side 2.
b, extends laterally longer than 3b, and each side 2a, 2
b, 3a, 3b are made of highly conductive metal plates such as copper, aluminum, brass, etc., having screw holes 2c, 2d, 3c, 3d for screwing terminal fixing bolts, and are placed on the block 1 at intervals from each other. The device side terminal 2 and the ground side terminal 3 are fixed facing each other back to back, and the device side terminal 2 and the ground side terminal 3 can be stretched over the upper sides 2b and 3b of the device side terminal 2 and the ground side terminal 3, and both ends can be bolted. Change the direction by 90 degrees and connect the upper side 2 of the equipment side or ground side terminals 2 and 3 of another adjacent terminal block.
Since the grounding terminal block is constructed by providing a short bar 10 which can be spanned between blocks 1 and 3b and bolted to one end thereof, block 1 can be connected to rail R.
By fitting the fitting part 1a at the bottom of the , multiple grounding terminal blocks can be easily installed in a short time.
and a short-circuit bar 10 that short-circuits the terminal 3 and the ground terminal 3.
is fixed to the top of the upper sides 2b, 3b of both terminals 2, 3, so the connection becomes three-dimensional, and each terminal 2, 3
This has the effect of reducing the length of both ends on a plane, thereby reducing the installation space as a whole.

[Brief explanation of the drawing]

Figures 1 to 6 show an example of the implementation of the present invention, where Figure 1 is an exploded perspective view, Figure 2 is a plan view, Figure 3 is a cross-sectional view of Figure 2, and Figure 4. 5 is a side view, FIG. 5 is a plan view of the shot bar, FIG. 6 is a wiring diagram showing a connection example, FIG. 7 is a front view showing a conventional grounding terminal block, and FIG. 8 is a plan view thereof. 1...Block, 1a...Mating part, 2...Device side terminal, 2a...Bottom side, 2b...Top side, 2c, 2
d...screw hole, 3...ground side terminal, 3a...bottom side, 3b...top side, 3c, 3d...screw hole, 6,
7, 8, 9...Bolt, 10...Shot bar,
R...Rail.

Claims (1)

[Scope of claim for utility model registration] A synthetic resin block having a fitting part at the bottom that can be fitted to a terminal block mounting rail, each bent in a U-shape so that the bottom side extends laterally longer than the top side, Each side is made of a highly conductive metal plate having a screw hole for screwing a terminal fixing bolt, and an equipment side terminal and a grounding side terminal are fixed on the block facing each other back to back with a distance between them. , It is possible to span over the top edge of the device side terminal and the ground side terminal and bolt both ends, and change the direction by 90 degrees and connect it between the top side of the device side or ground side terminal of another adjacent terminal block. A grounding terminal block equipped with a short bar that can be spanned over the ground and one end can be bolted to it.