JPS6220668B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a terminal block mounting structure for fixing a terminal block with a ground terminal to a mounting block.

[Background of the Invention] FIG. 1 shows a terminal block with a ground terminal described in Japanese Utility Model Application Publication No. 49-114774. By simply attaching this terminal block A' to the metal mounting base 4a, a ground connection can be made using the ground terminal 3a. Therefore, it is convenient.

In the case shown in FIG. 1, the terminal block A' is fixed to the mounting base 4a using two sets of bolts 8a, washers 8b, and nuts 8c. Therefore, it takes time and effort to install and fix, and its structure is also complicated.

In the one in FIG. 1, the edge 3b of the ground terminal 3a
The connection is completed by simply pressing the metal mount 4a against the plate surface of the metal mount 4a. Therefore, the electrical connection to the plate surface is uncertain. Also, if you force the connection,
The ground terminal 3a or the mounting base 4a is undesirably deformed.

FIG. 2 is the one described in Japanese Utility Model Application Publication No. 103340/1983. This is not a terminal block, but a ground terminal as a single item. This ground terminal 3e has a bolt 8e
Accordingly, the screw hole 7e in the metal mounting base 4e
be installed at the location. With this attachment, the end edge 3f of the ground terminal 3e is inserted into the cut-in hole 10e previously formed in the metal mounting base 4e.

In the one in Figure 2, the edge 3f of the ground terminal 3e
Ensure that the ground connection is secure. This is edge 3
This is because f does not merely abut on the biting hole 10e, but also penetrates further into the hole 10e and bites into it.

In the one shown in FIG. 2, the ground terminal 3e is obliquely applied to the metal mounting base 4e due to the influence of its edge 3f. Therefore, it is difficult to screw in the bolt 8e. Due to some circumstances, bolt 8e
from the bottom of the metal mounting base 4e.
This becomes a particularly difficult task if it is necessary to screw it into the ground terminal 3e via the ground terminal 3e.

In the one shown in FIG. 2, the ground terminal 3e is applied diagonally as described above. In order to make the inclination gentle while keeping the biting allowance by the edge 3f constant, the horizontal dimension of the entire ground terminal 3e may be set large. However, in this case, as the bolt 8e is tightened, the ground terminal 3e
As a result, the entire body is bent in the horizontal direction, and the strong force necessary for biting is not applied to the edge 3f.

[Object of the Invention] The present invention proposes a simple mounting structure for a terminal block with a ground terminal. Furthermore, the present invention proposes a mounting structure that is easy to install and provides reliable ground connection.

[Summary of the Invention] In the present invention, a metal ground terminal is provided on an insulating terminal block. A sloped edge is provided on a part of the tip of the ground terminal, and the tip of the ground terminal projects downward from the lower surface of the terminal block.

On the other hand, a metal plate mounting base on which the terminal block is attached is provided with a cut-in hole into which the tip of the ground terminal fits and a screw insertion hole for a mounting screw.

In the present invention, a single mounting screw is used. Screw the tip of this screw from the bottom of the mount through the screw insertion hole in the mount and into the screw hole on the bottom of the terminal block. As a result, the terminal block is fixed to the mounting base, and the inclined edge of the ground terminal is bitten into the edge of the cut-in hole to establish a ground connection.

If the terminal block is left in contact with the mounting base, the mounting base will tilt. This is because the inclined edge of the ground terminal rises by an amount corresponding to the biting allowance. However, the terminal block has a horizontal extension as a terminal block. Therefore, the above slope of the terminal block is gentle.

The mounting screws are screwed into the slightly slanted terminal block screw holes. As the screws are tightened, a strong force is applied to the sloped edge of the ground terminal via the terminal block.
This results in the beveled edge digging into the edge of the gouge hole. The strong force acting on the inclined edge is due to the rigidity of the terminal block. After tightening the screws, the inclination of the terminal block is almost corrected, and the bottom surface of the terminal block is in stable contact with the mounting surface of the mounting base.

[Embodiments of the Invention] Here, the embodiments shown in FIGS. 3 to 6 will be described. In the figure, 1 is a terminal base, 2 is a bottom plate attached to the base 1, and both constitute an insulating terminal base A. 3 is the ground terminal part 11 of the terminal base 1
A ground terminal is attached to the ground terminal by a ground terminal mounting screw 9. 32 is a connection screw for a ground wire (not shown). The upper surface of the terminal base 1 is provided with a wire insertion hole 12 and a connection release hole 13 for connecting a power supply wire or a load lead wire (not shown). The wire insertion hole 12 and the connection release hole 13 are unique to a so-called quick connection mechanism.

The ground terminal 3 has an inclined edge 33 formed at a part of its tip, and is configured such that the tip protrudes downward from the bottom surface of the terminal block A.

On the other hand, 4 is a mounting base made of a metal plate. An example of this mounting base 4 is a thin iron plate corresponding to the main body of the lighting equipment. 7 is a screw insertion hole formed in the mounting base 4. The screw insertion hole 7 is not a screw hole. Reference numeral 10 indicates a hole formed in the mounting base 4. The bite hole 10 corresponds to the ground terminal 3.

8 is one mounting screw. The mounting screws 8 are arranged from the bottom of the mounting base 4. The tip of the mounting screw 8 passes through the screw insertion hole 7 of the mounting base 4 and is screwed into a screw hole (not shown) on the lower surface of the terminal block. Attach the terminal block A to the mounting base 4 with this single mounting screw 8,
Tighten up.

As shown in FIG. 5, when the terminal block A is placed on the mounting base 4, the terminal block A tilts. Under this situation, one end P of the terminal block A contacts the plate surface of the mounting base 4, and the tip of the ground terminal 3 of the terminal block A contacts the bit hole 10. The longer the distance from one end P to the tip of ground terminal 3, the more terminal block A
The slope of becomes smaller. This distance varies depending on the arrangement of the tip of the ground terminal 3, but at least terminal block A
It is half the length of the bottom.

The mounting screw 8 is screwed into the terminal block A, which is inclined as shown in FIG. 5, through the mounting base 4. When the mounting screw 8 is tightened, the terminal block A functions as a beam with one end P as a fulcrum, and the inclined edge 33 of the ground terminal 3 is bitten into the edge of the biting hole 10. As a result, the situation shown in FIG. 6 results. Under this situation, the ground terminal 3 is reliably electrically connected to the mounting base 4. Further, the inclination of the terminal block A is corrected, and the lower surface of the terminal block A stably contacts the mounting surface of the mounting base 4.
Terminal block A has mounting screw 8 and ground terminal 3
It is connected without loosening at two places.

[Effects of the Invention] In the present invention, one mounting screw is arranged below the mounting base made of a metal plate, and the tip of this screw is screwed into the screw hole on the lower surface of the terminal block through the mounting base. Therefore, the mounting structure is simple and short mounting screws can be used.

The ground terminal of the present invention is provided on a terminal block. For this reason, the inclination when this is placed on the mounting base is gentler than that in the case of a single ground terminal. Therefore, it becomes easy to screw the mounting screw into the terminal block via the mounting base.

The present invention utilizes the rigidity of the terminal block to apply a strong force to the ground terminal, thereby causing the tip of the ground terminal to bite into the bite hole of the mounting block. Therefore, the ground connection to the mounting base is ensured.

A single mounting screw is used to attach the terminal block of the present invention. However, the terminal blocks are connected not only at the mounting screws but also indirectly through the ground terminal with a recessed tip. For this reason,
The result is almost the same as stopping in two places, and the terminal block is firmly connected to the mounting base without loosening.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the conventional terminal block mounting structure;
Fig. 2 is a perspective view showing a conventional ground terminal mounting structure, Fig. 3 is a side view showing a terminal block mounting structure according to the present invention, Fig. 4 is an exploded perspective view thereof, and Fig. 5 is a state during its installation. FIG. 6 is an enlarged side view of the main part showing the state after installation. 1... Terminal base, 2... Bottom plate, 3... Earth terminal, 4... Mounting base, 7... Screw insertion hole, 8... Mounting screw, 10... Biting hole.

Claims (1)

[Claims] 1. An insulating terminal block consisting of a terminal base and a bottom plate, a metal earth terminal provided on the terminal block, a mounting base made of a metal plate to which the terminal block is attached, and a bottom surface of the terminal block attached to the mounting base. and a single mounting screw for fixing the terminal block to the mounting base so as to come into contact with the mounting surface of the base, and a sloped edge is provided at a part of the tip of the ground terminal. protrudes downward from the bottom surface of the terminal block, and the mounting base is provided with a recessed hole into which the tip of the ground terminal fits and a screw insertion hole for the mounting screw, and the tip of the mounting screw is inserted through the screw insertion hole into the terminal. A terminal block with a ground terminal, characterized in that the terminal block is screwed into a screw hole on the bottom surface of the base to fix the terminal block to the mounting base, and the inclined edge of the ground terminal is bitten into the edge of the cut-in hole. Mounting structure.