JPS59220008A - Connector with earth terminal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a connector with a ground terminal used for connecting a conduit and a wiring box.

[Background technology]

Conventional connectors with ground terminals are often made of zinc die-casting because they are easy to manufacture, allowing the shape of the ground terminal to be freely selected and the ground terminal being molded at the same time as the main body. but,
Zinc die-cast connectors have the above-mentioned manufacturing advantages, but they also have the drawbacks of high cost (and low strength).Therefore, it was devised to make connectors using steel pipes.Steel pipes By using , an inexpensive and high-strength connector can be obtained.

A steel pipe connector with a ground terminal generally has a structure as shown in FIG. As shown in the figure, this connector has a cylindrical body 1 in which a part is a small diameter part 1a and the rest is a large diameter part 1b, and a male thread 2 for engaging a lock nut is formed on the outer peripheral surface of the small diameter part 1a. On the peripheral wall of the large-diameter portion 1b into which the conduit is inserted, a stopper 3 for fixing the conduit is inserted into a screw hole penetrating the peripheral wall of the cylinder 1, and a stopper 3 is provided that protrudes from the outer peripheral surface. A seat 4 having a round planar shape is provided. The seat 4 is provided with a tapped hole 4a into which a terminal screw 5 serving as a ground terminal is inserted, and grooves 4b, 4b into which a ground terminal 6 is fitted on both sides of the screw hole 4a.

With this conventional connector, the ground wire is connected by inserting the ground wire into the groove of the seat and then tightening the terminal screw. However, when connecting, the ground wire easily comes off from the groove due to the rotation of the terminal screw, making it difficult to connect. There was a problem. Further, there is also a problem in that after connection, the terminal screw naturally loosens due to vibration or the like, and the ground wire often comes off from the terminal screw.

OBJECTS OF THE INVENTION The object of the present invention is to provide a connector with a ground terminal that allows easy connection of a ground wire and reduces the risk of the connected ground wire becoming disconnected.

[Disclosure of the Invention] In order to achieve the above-mentioned object, the present invention provides a cylinder body in which a part is a large diameter part and the remaining part is a small diameter part, and a male thread for screwing a lock nut is formed on the outer circumferential surface of the small diameter part of the cylinder body, The connector is provided with a set screw penetrating the peripheral wall for fixing the conduit in the large diameter part, and a ground terminal for connecting a U-shaped ground wire, the cylindrical body A planar polygonal seat is provided at the location where the ground terminal wall is installed, even if it rises from the outer circumferential surface, and a U-shaped terminal plate that has spring properties and secures the ground wire by sandwiching it at both ends is used as the terminal. It is fixed to the seat with a screw and forms a ground terminal.
At least one side in the width direction of the terminal board is formed with a bent groove into which the ground wire is fitted, and the groove wheel surface portion protruding from the bottom surface of the terminal board is brought into contact with the side of the seat, so that the terminal board is fitted into the seat G. The gist of the present invention is a connector with a ground terminal, which is characterized in that it does not rotate.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 2 (b) and FIG. 3 show a connector with a ground terminal according to the present invention. As shown in the figure, this connector with a ground terminal has a cylindrical body in which a part has a small diameter part 7a, the rest has a large diameter part 7b, and a flange 7C is provided between the small diameter part 7a and the large diameter part 7b. 7, a male thread 8 for fitting a lock nut a is formed on the outer peripheral surface of the small diameter portion 7a, and a set screw 10 for fixing the conduit 9 is formed on the peripheral wall of the large diameter portion 7b into which the conduit 9 is inserted. It is inserted into a perforated hole penetrating the peripheral wall of the body 7.

The connector according to the present invention has a ground terminal 11 made up of a terminal screw lla and a terminal plate 11b, and this ground terminal 11 is provided on a planar rectangular ρ seat 12 that protrudes from the outer peripheral surface of the cylindrical body 7. It is different from the conventional one. As shown in detail in FIG. 3, the terminal plate 11b is formed by bending a metal plate into a U-shape (including a 7-shape), and has spring properties. Then, on both sides of the end portion 13 that is the lower side (seat 12 side) of the terminal plate 11b, a U-shape (
A14 (which may be V-shaped) is bent, and insertion holes 13a and 15a for terminal screws 5 are provided at both ends 13 and 1.5, respectively. The seat 12 is provided with a screw hole 12a into which a terminal screw lla is inserted.

In the connector according to the present invention, for example:

The ground wire is connected as shown below. First, terminal board 1
Terminal board 11b is placed in such a way that the direction of the curved part of 1b is perpendicular to the axial direction of cylindrical body 7, and the back side parts of two i14, 14 that protrude from the bottom surface of the terminal board are in contact with both sides of seat 12. Place it on the seat 12, pass the terminal screw lla through the insertion holes 15a, 13a of the terminal board 11b, and shallowly insert it into the screw hole 12a of the seat 12.

Next, fit the ground wire 6 into the groove 14 and insert the terminal screw 11a.
Tighten firmly. Then, the ground wire 6 is connected to the terminal plate 11b.
It gets caught between both ends 13 and 15 of , and cannot be removed.

With this connector, when connecting the ground wire, the terminal screw lla
Even if the terminal plate 11b is rotated, the terminal plate 11b does not rotate because the back side of the groove 14 is in contact with the side of the seat 12. Moreover,
Since the ground wire 6 is sandwiched between both ends 13.15 of the terminal plate 11b and also fitted into the groove 14, when the terminal screw Ila is rotated, the ground wire 6 is inserted into the terminal plate 11b.
There is very little risk of it coming off. Therefore, connection of the ground wire is easy. Since the terminal plate 11b has spring properties, after tightening the terminal screw lla, the terminal screw l
For the rabbit of la, the end (upper piece) 15 of the terminal board 11b
is constantly applying a force in the direction of moving away from the cylinder body 7. Therefore, there is very little possibility that the terminal screw lla will loosen due to vibration or the like.

Note that the connector with a ground terminal according to the present invention is not limited to one made from a steel pipe. If the width of the middle part is narrower than the width of both ends that sandwich the ground wire, like the terminal board used in the example, the middle part will not touch the ground wire, which is convenient when making connections. good. In the embodiment, the seat is a rectangular plane, but it may be a polygon other than a rectangle. In the embodiment, grooves are provided on both sides of one end of the terminal plate, but grooves may be provided on only one side. When grooves are provided on both sides of one end of the terminal plate, it is sufficient that at least one side can be placed against the seat.

Similar to the conventional connector, the connector with a ground terminal according to the present invention can be attached to the wiring box by passing the small diameter part 7a through the hole 16a provided in the side wall of the wiring box 16 and then inserting a lock nut into the small diameter part 7a. Fixed to the body 16, the large diameter portion 7
The conduit 9 is connected to the conduit 9 by tightening the setscrew 10 after inserting the conduit 9 into the conduit 9 .

〔Effect of the invention〕

Since the connector with a ground terminal according to the present invention includes the above-described ground terminal and seat, it is easy to connect the ground wire and there is little possibility that the connected ground wire will come off.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional connector with a ground terminal, and in FIG.
FIG. 3 is a plan view of the embodiment with electric wires connected to it, FIG. 3 is a longitudinal cross-sectional view of the same state, and FIG. 7...Cylinder body 7a...Small diameter part 7b...Large diameter part
8... Male screw 10... Set screw 11... Earth terminal 11a... Terminal screw Ilb... Terminal board 1
2... Seat 14... Mizo Agent Patent Attorney Takehiko Matsumoto Figure 1 l Figure 3 36-

Claims (1)

[Claims] (1) A male thread for a lock nut screw is formed on the outer circumferential surface of the small diameter part of the cylinder, part of which is the large diameter part and the rest part is the small diameter part, and the large diameter part has a stopper for fixing the conduit. A connector in which a cylindrical body is provided through a peripheral wall and a ground terminal for connecting a ground wire is provided, and the part of the cylindrical body where the ground terminal is installed is raised from the outer circumferential surface. A U-shaped terminal board is provided with a planar polygonal seat, has spring properties, and fixes the ground wire by being sandwiched between both ends, and is fixed to the seat with a terminal screw to form the ground terminal. A groove into which the ground wire is fitted is bent in at least one side in the width direction of the terminal plate, and the groove wheel surface portion protruding from the lower surface of the terminal plate is brought into contact with the side of the seat to prevent the terminal plate from rotating relative to the seat. A connector with a ground terminal characterized by: