JPH033994Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a structure for attaching a ground terminal of a subscriber protector used at an indoor lead-in point of a communication line.

(Prior Art) Since a carbon lightning arrester with a rectangular outer shape has been used in a conventional subscriber protector, the lightning arrester mounting hole has a correspondingly rectangular opening. Therefore, even when a gas-sealed lightning arrester having a button-shaped outer shape is installed, it is installed inside a case having a rectangular outer shape. This lightning arrester has a structure in which an upper electrode and a lower electrode are provided on the upper and lower sides, and a long groove is formed in the upper electrode in the length direction.
Details are disclosed in No. 12287.

The subscriber protector equipped with the above-mentioned lightning arrester was provided with contact plates connected to the upper and lower electrodes, respectively.

(Problems to be Solved by the Invention) However, the distance between the contact plates is long over the top and bottom of the rectangular case, and one of the contact plates is further connected to a separately provided ground terminal. As a result, the subscriber protector cannot be downsized, but the grounding part in particular has become complicated.

Further, Japanese Utility Model Publication No. 47-5770 discloses a structure in which a lightning arrester mounting hole that opens upward is formed in the front surface of the upper half of an insulating base, and left and right terminals and a ground terminal are formed below the lightning arrester mounting hole. However, since the subscriber protector is generally fixed at a high location on the outer wall, it has been pointed out that it is extremely troublesome to pull out the lightning arrester upwardly against the elastic force.

Moreover, as mentioned above, since the lightning arrester installation space extends greatly in the vertical direction, it has been impossible to reduce the size accordingly.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to miniaturize the protector and simplify the work of replacing the lightning arrester in cases where the earth terminal can be easily configured. It is something.

(Means for Solving the Problems) A subscriber protector according to the present invention to achieve the above object consists of an insulating base and a lid body, and the insulating base is a receiving frame portion that protrudes from the lower front surface and is generally approximately It has an L-shape, and has a lightning arrester mounting hole, an earth block, and left and right blocks formed in the insulating base, and by inserting a ground terminal piece into the lightning arrester mounting hole, a ground contact plate is provided on one side of the lightning arrester mounting hole, and a grounding seat is formed. A piece is placed on the earth block,
This invention relates to a ground terminal configured by screwing a set screw into a ground seating piece.

The feature is that the earth block protrudes forward from the upper front of the insulating base at the lower section of the left and right blocks, and the lightning arrester mounting hole is located between the left and right blocks separated by the earth block and the lower receiving frame. The earth terminal piece is comprised of an earth contact plate that has a generally U-shaped flat plate shape as a whole, and an earth seating piece that stands up from between this U-shape, and connects the lightning arrester mounting hole to the receiving frame side. The grounding seat piece is located on the grounding block surface by attachment, and the grounding contact is curved and protrudes from the terminal piece seating part to the lower lightning arrester mounting hole on the left and right blocks. .

(Function) When the U-shaped part of the grounding terminal piece is positioned on the grounding block and the grounding contact plate is inserted horizontally into the lightning arrester mounting hole from the top surface of the receiving frame, the grounding contact plate is attached to the bottom surface of the lightning arrester mounting hole. At the same time, the grounding seating piece is located in front of the grounding block. A ground terminal is constructed by screwing a set screw into the ground seating piece.

The ground contact is curved and protrudes from the seating portion of the terminal piece fixed to the left and right blocks toward the lower lightning arrester mounting hole, so that it is paired with the ground contact plate. As a result, the lightning arrester is installed and removed from the lower front surface of the insulating base.

(Example of the invention) The drawings illustrate one embodiment of the earth terminal structure of a subscriber protector, in which Fig. 1 is an exploded perspective view of the same, Fig. 2 is a perspective view of the installed state, and Fig. 3 is a ground wire. FIG. 4 is an enlarged plan view illustrating the attached state, and FIG. 4 is an enlarged sectional view illustrating the communication line attached state.

The subscriber protector consists of an insulating base 1 and a lid 2, and the insulating base 1 is provided with a line terminal 3 and a ground terminal 4 as communication terminals.
Each terminal 3, 4 is provided with a detent mounting part 5 and a locking part 6, 7 on the insulating base 1, and when a nut 8 is dropped into the detent mounting part 5 from one direction, the locking part 6 , 7, the insertion pieces 11, 12 of the terminal pieces 9, 10 are inserted and engaged. Furthermore, the washer 14 is stacked as required, and the set screw 13 is screwed into the nut 8 through each of these through holes 15, 16, 17.

To be more specific, on the front surface of the insulating base 1, there are blocks 20, 20, 21 between the upper left and right and the lower parts.
are arranged in a protruding manner, and a pair of lightning arrester mounting holes 23, 23 separated by the earth block 21 are formed between the pair of left and right blocks 20, 20 and the lower receiving frame portion 22. The blocks 20 and 21 have the locking portions 5 formed in the shape of hexagonal grooves in the center surrounded by frames 24 and 25, respectively, and the left and right blocks 20 have the locking portions on both upper and lower sides of the locking portions 5. 6 are formed in the shape of punched holes, and the upper and lower frames 24 of these locking portions 6 are provided with notches 26 and 27.

In addition, the earth block 21 has left and right frames 25, 25.
The upper surface surrounded by is formed up to the surface between the left and right blocks 20, 20, and communicates with the ground wire insertion hole 28 of the receiving frame portion 22 at different levels. Left and right frame 25
A relief portion 25a is formed around the set screw. The locking portion 7 is provided in the shape of a hole in the receiving frame portion 22 near the ground wire insertion hole 28 . In the figure, 30 is a communication line insertion port that opens upward between the left and right blocks 20, 20 from below the receiving frame 22 through the back side of the earth block, 31 is a mounting plate to the wall, and 32 is a mounting plate for mounting the mounting plate 31. It's a hole.
Further, 33 and 34 are protrusions at the center of the upper edge of the insulating base 1, and 35 is a protrusion on the inside of the lid body 2.

Further, the terminal piece 9 has a substantially rectangular seating portion 40.
and a pair of insertion pieces 11 that are bent downward from both sides of the seating portion 40 to have spring properties, and a ground contact that is curved and formed between one of the insertion pieces 11 to have spring properties. It consists of 41.

Further, the ground terminal piece 10 is composed of a ground contact plate 42 having a U-shaped flat plate shape as a whole, and a ground seating portion 43 raised from between the U-shapes.

To assemble the line terminal 3 based on the above configuration, place the insulating base with the front surface facing upward, drop the nuts 8 into the detent mounting part 5 from above, and then insert them into the locking part 6 from above. When the pieces 11, 11 are pushed in, the insertion pieces 11, 11 engage in male and female engagement within the hole of the locking portion 8. Therefore, the terminal piece 9 is attached with the nut 8 being prevented from rotating, and the seating portion 40 is located inside the frame 24 of the left and right blocks 20 in this state. Thereafter, if necessary, the washer 14 is placed from above, and the set screw 13 is screwed into the nut through the square through holes 14 and 16. In the installed state, the ground contact 41 faces the lightning arrester mounting hole 23 from the notch 27 of the frame 20.

The ground terminal 4 is connected to the U-shaped ground contact plate 42 after dropping the nut 8 onto the detent mounting part 5 from above.
When the insertion piece 12 is inserted downward into the locking groove 29 of the lightning arrester mounting hole 23, the insertion piece 12 is locked and attached to the locking portion 7. In the installed state, the seating part 10 is attached to the nut 8.
Since it is located on the upper surface of the nut 8, it is only necessary to screw the set screw 13 into the nut 8. In the installed state, the thickness of the ground contact plate 42 allows the ground wire insertion hole 28 to be on the same plane as the ground contact plate 42, and at the same time, the ground contact plate 42 is located below the lightning arrester mounting hole 23.

According to the above configuration, the mounting plate part 31 is brought into contact with a wall surface or the like and fixed with screws or the like through the mounting hole 32, and the communication line C is inserted through the communication line insertion port 30 and pulled out from above the left and right blocks 20, 20. . Insert the communication core wire into the lower surface of the washer 14 of the set screw 13 that has been loosened in advance, and tighten the set screw 13.

If the ground wire is inserted through the ground wire insertion port 28, it will come into contact with the seating portion 43 on the same surface, so it is only necessary to tighten the set screw 13. Furthermore, the work is completed by installing the lightning arrester A into the lightning arrester mounting hole 23.

According to the above embodiment, the following effects are achieved.

When the ground wire is inserted through the ground wire insertion hole 28, it passes through the lower surface of the screw head of the set screw 13 and the upper surface of the seating part, and the ground wire is regulated by the left and right frames 25 and the relief portion 25a, so it can be inserted very easily and reliably. You can wire the ground wire. Moreover, since the ground wire insertion port 28 and the seat portion 43 are flush with each other by attaching the seat portion 43, the ground wire can be drawn in without bending the ground wire.

Since the insertion direction of the ground terminal piece 10 is the same as that of the other terminal pieces, workability is good and automation is easy.

The present invention is not limited to the one embodiment described above, and various design changes are possible.

(Effects of the Invention) According to the earth terminal structure of the subscriber protector having a simple plug-in assembly structure according to the present invention, the following effects are achieved.

The earthing block is projected forward from the upper front of the insulating base at the lower middle of the left and right blocks that are projected forward, and the lightning arrester mounting hole is configured horizontally between the left and right blocks separated by the earthing block and the lower receiving frame. In contrast, the ground terminal piece is equipped with an earth contact plate that has a generally U-shaped flat plate shape as a whole, and an earth seating piece that stands up from between this U-shape, and is connected to the receiving frame side of the lightning arrester mounting hole. The ground seating piece is positioned on the earth block surface by attaching a terminal piece, and the ground insertion hole is communicated with the receiving frame on the front side of the ground seating piece. Since the ground contact is curved and protrudes toward the lightning arrester mounting hole, the lightning arrester can be mounted horizontally using the space between the left and right base blocks of the insulation base and the receiving frame, eliminating the conventional vertical mounting space. We were able to reduce the size of the subscriber protector to about half. As a result, we were able to eliminate complaints from subscribers that the outer walls were too large.

The lightning arrester can be easily extracted and inserted from the front and rear directions into the lightning arrester mounting hole between the left and right base blocks and the receiving frame, simplifying the replacement work.

[Brief explanation of the drawing]

The drawings illustrate one embodiment of the earth terminal structure of a subscriber protector, in which Figure 1 is an exploded perspective view of the same, Figure 2 is a perspective view of the installed state, and Figure 3 is an enlarged view illustrating the installed state of the ground wire. The plan view and FIG. 4 are enlarged sectional views illustrating the state in which the communication lines are attached. 1...Base, 2...Lid, 3...Line terminal,
4...Earth terminal, 10...Earth terminal piece, 12
... Insert piece, 13 ... Set screw, 21 ... Earth block, 23 ... Lightning arrester mounting hole, 25 ... Frame,
28...Ground wire insertion port, 43...Seating part, A...
...Lightning arrester.

Claims (1)

[Scope of Claim for Utility Model Registration] Consisting of an insulating base and a lid body, the insulating base has an approximately L-shape as a whole with a receiving frame protruding from the lower front, and the insulating base has a lightning arrester mounting hole, an earth block, and left and right blocks. A ground contact plate is provided on one side of the lightning arrester mounting hole by inserting the ground terminal piece into the lightning arrester mounting hole, and a grounding contact plate is positioned on the grounding block, and the earthing contact plate is placed on one side of the lightning arrester mounting hole by inserting the grounding terminal piece into the lightning arrester mounting hole. In the grounding terminal structure of the subscriber protector, the grounding terminal is configured to have a grounding terminal, and the grounding block projects forward from the upper front surface of the insulating base at the lower middle of the left and right blocks, and the lightning arrester mounting hole is connected to the grounding block. The grounding terminal piece is constructed horizontally between the left and right blocks divided by the left and right blocks and the lower receiving frame part, and the grounding terminal piece is a grounding contact plate having a generally U-shaped flat plate shape as a whole, and a grounding seating piece raised from between this U-shaped grounding contact plate. By attaching the lightning arrester mounting hole to the receiver frame side, the grounding seating piece is positioned on the grounding block surface, and furthermore, the left and right blocks have ground contact from the terminal piece seating area to the lower lightning arrester mounting hole. A ground terminal structure of a subscriber protector characterized by a curved protruding terminal.