JPS6119496Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a bag-shaped rubber stopper that fits into the lead-out part of electrical equipment such as a box-shaped cutout, a cylindrical cutout, a lightning arrester, a switch, etc., and is suitable for connecting electric wires. The purpose is to prevent wire breakage accidents.

This type of device has a wire connection terminal inside the container, an external wire is inserted through a wire insertion hole provided in the corresponding container body, and a core plug is tightened and fixed to the wire connection terminal with a screw or the like.

Therefore, during use, due to vibrations caused by wind pressure, etc., wire breakage accidents may occur due to concentrated unbalanced loads being applied to the wire section at the base end of the terminal, wire breakage accidents caused by damage to the wire when tightening the wire, and wind pressure. There were problems such as loosening of the terminals due to such factors.

The present invention solves the above problems at once by improving the bag-shaped rubber plug for the wire insertion hole, which is conventionally used to prevent electric shock, and by inserting a sleeve into the wire insertion hole of this bag-shaped rubber plug. It is something.

The specific configuration of the present invention will be explained below based on the drawings.

FIG. 1 shows an embodiment of a bag-shaped rubber stopper according to the present invention, in which 1 has a through hole 2 for inserting an electric wire and has a substantially truncated conical bulge 1a; A cylindrical part 1 that tapers slightly from the base end and whose outer peripheral surface can be tightly fitted into the wire insertion hole provided in the vessel body.
The upper end of the bulging portion 1a has a cross-sectional or flattened tip, and a protrusion with a key-shaped cross section is formed inside to tighten the electric wire. Let's call it Hakibe 3. On the other hand, the end of the cylindrical part 1b is
A sleeve 4 made of copper or copper alloy is inserted and fixed, the outer periphery of which is formed into a slightly mortar shape, has a latch-like locking portion 4a that engages with the slope of the mortar, and is provided with vertical slits 4b. .

FIG. 2 shows another example of a bag-shaped rubber stopper, with through-hole 2.
The shape of the wire is changed to strengthen its grip with the electric wire, thereby increasing its anti-fouling effect.

Next, to explain the state of use of the bag-shaped rubber stopper of the present invention, FIG. When the cylindrical part 1b of the bag-shaped rubber stopper 1 is inserted into the side electric wire through hole 6, the locking protrusion 1C is caught on the inner surface of the side part to prevent it from coming off, and the proximal end of the bulged part 1a is is engaged with the outer side surface. On the other hand, the sleeve 4 is inserted into a wire insertion hole 8 of a wire connection terminal 7 fixed inside the cutout body.

In this state, when the electric wire 9 with a predetermined length of the sheath removed from the end is inserted into the through hole 2 of the bag-shaped rubber stopper 1,
The core wire 9a is inserted into the sleeve 4, and the insulating coating portion is locked with the flap-like locking portion 4a of the sleeve 4. In this state, the screw 1 of the wire connection terminal 7 is inserted.
By tightening the wires 0 and 10, the sleeve 4 is flattened at the slit 4b, sandwiching the core wire 9a, and the outer periphery of the lower surface of the sleeve 4 and the inner periphery of the lower surface of the wire insertion hole 8 are pressed together, and are firmly fixed and held. At the same time, a good energization state is ensured.

Since the bag-shaped rubber stopper of this invention has a sleeve,
The sleeve does not damage the core wire when tightening, and the end of the sleeve is made into a wrapper shape to facilitate insertion of the core wire, and it fits and secures inside the bag-shaped rubber stopper so that it can be inserted securely into the wire connection terminal. It's getting old.

Further, the covered portion of the electric wire is supported by a rubber plug consisting of a cylindrical portion supported by the container body, a bulging portion formed in a substantially truncated conical shape, and a holding portion provided on the bulging portion,
Even if it vibrates due to wind pressure, etc., it is buffered by the elasticity of the rubber, reducing the load applied to the wire connection part, and since the base of the core wire is fixed to the rubber stopper by the latch-like locking part of the sleeve 4, it can be directly It is possible to prevent the application of external force and has the effect of completely eliminating disconnection accidents.

In addition, the actual usage condition for the box-shaped cutout is the 4th one.
It will look like the perspective view in the figure.

FIG. 5 shows the present bag-shaped rubber stopper used in a cylindrical cutout, which has an elongated insertion hole 11 inside, and is inserted into the inner top of a cylindrical insulator 12 whose upper end is closed and whose lower end is open. A fixed electrode 13 is fixedly installed. An electric wire connection terminal 14 electrically connected to the fixed electrode 13 is led out and fixed to the upper part of the vessel, so that an electric wire can be inserted from above. Then, an insulating cap 16 having a hole 15 in its upper part is fitted and fixed to the container body so as to cover the connection terminal.

The case of attaching the bag-shaped rubber stopper is the same as the box-shaped cutout, but the only difference is that the cylindrical part of the bag-like rubber stopper is fitted and fixed into the hole of the insulating cap.

The effect is exactly the same as in the case of a box-shaped cutout.

As explained above, the present invention, by internally fixing the sleeve to the bag-shaped rubber stopper, can securely tighten and fix the wire without damaging it.
Even if vibrations such as wind pressure are applied, the wire itself is buffered by the bag-shaped rubber stopper supported by the device, and the sleeve is fixed to the bag-like rubber stopper, so no direct load is applied to the core wire. It has a double disconnection prevention effect. Moreover, it is a useful device in practical use, as it can be easily replaced with existing electrical equipment.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, FIG. 1 is a cross-sectional view of the bag-shaped rubber stopper with a sleeve according to the present invention, FIG. 2 is a cross-sectional view showing another example, and FIG. FIG. 4 is a perspective view of the same, and FIG. 5 is a partial sectional view showing another state of use. 1...Bag-shaped rubber stopper, 1a...Bulging portion, 1b...
Cylindrical part, 4... Sleeve, 4a... Locking part, 4b
...Slit.

Claims (1)

[Scope of utility model registration request] A cylindrical portion 1b whose outer circumferential surface can be tightly fitted into a wire insertion hole provided in an adjacent container body corresponding to a wire connection terminal provided inside the electrical device body, and a cylindrical portion 1b which also protrudes outward from the insertion hole. A bag-shaped rubber stopper 1 is formed with a bulging portion 1a having a substantially truncated conical shape, and an electric wire 9 is placed inside the opening on the wire insertion side of an electric wire through hole 2 provided through the bag-like rubber stopper. At the same time, the inner surface of the electric wire through hole 2 on the opening side of the cylindrical part is formed in a conical shape, and the outer periphery is formed from the opening of the cylindrical part to the conical surface. protrudes from a sleeve 4 having a flap-like locking portion 4a that engages with the sleeve 4 and having a vertically divided slit 4b;
A bag-shaped rubber stopper with a sleeve, characterized in that one end thereof can be inserted into the electric wire connection terminal.