JPS5848991B2 - Conductor tightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tightening device for a conductor connection, and particularly to a tightening device used in an environment where vibrations are easily applied.

Conventional conductor connection clamping structures have various drawbacks.

1 to 3 illustrate a conventional tightening structure.

In the figure, a bolt 4 passes through an insulating plate 1, and a lock nut 8 clamps the insulating plate and fixes the insulating plate to the head of the bolt.

Reference number 11.10 is a washer, and 9 is a spring washer.

The bolt 4 further passes through the conductor 2, and this conductor 2
A nut 5 clamps and fixes the conductor to a lock nut 8.

Reference number 3 is a crimp terminal, 7 is a washer, and 6 is a spring washer.

In such a tightening structure, the lock nut 8 may become loose and the conductor 2
There is a drawback that poor contact of the crimp terminal 3 is likely to occur.

Poor contact due to loose lock nuts is often caused by the material of the insulating plate.

Insulating plates generally expand and contract repeatedly due to temperature changes.

If the insulating board is a laminate board based on thermosetting resin,
As the material gradually withers, the thickness of the board becomes thinner.

FIG. 3 illustrates this state, in which the insulating plate has shrunk by a width t, creating a gap.

If vibrations are added to this, the lock nut 8 will loosen, and when the conductor is energized, poor contact between the crimp terminal 3 and the conductor 2 will likely cause severe sparks between the two.

Therefore, frequent maintenance and inspection is essential for disaster prevention.

However, with the conventional structure described above, even if it is possible to discover loosening of the nut 5 during inspection and retighten it, retightening the lock nut 8 to the bolt 4 is difficult only when working in a closed space.

Therefore, in general, the nut 5 has been loosened, the crimp terminal 3 and the conductor 2 have been removed, the lock nut 8 has been fully tightened, and reassembly has been performed.

Such maintenance work requires a great deal of effort and is highly dangerous for the workers.

SUMMARY OF THE INVENTION The object of the present invention is to provide a conductor clamping device which eliminates the drawbacks of the prior art described above.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In each of the embodiments shown in FIGS. 4 to 6 and 7 to 9, a tightening iron and a rotation stopper plate 14 that engages with the tightening iron are used in place of the conventional bolt and nut tightening structure. .

This tightening process is as shown in Figures 12 and 13.
A bolt head 15 is provided in the center, from which stud screws 16 and 17 protrude from the left and right sides.

The width W of the bolt head is substantially equal to or slightly smaller than the width W of the recess 18 of the rotation stopper plate 14 shown in FIGS. 10-11.

Therefore, the bolt head 15 enters the recess 18, and the wall of the recess engages with the bolt head to restrain it.

In the configuration examples shown in FIGS. 4 to 9, the rotation stopper plate 14 is interposed between the insulating plate 1 and the bolt head 15.

The engagement relationship between the rotation stopper plate and the bolt head of the tightening iron is performed at at least two locations on the rotation stopper plate.

Therefore, first insert the rotation stopper plate 14 into the stud screw 17 on the right side of the tightening iron, then insert the insulating plate 1, then position the washer 11 and spring washer 12, and tighten with the nut 13. The rotation stopper plate 14 does not rotate relative to the insulating plate.

Even if the insulating plate shrinks in the thickness direction, the bolt head 15
is maintained in its posture while being restrained by the recess 18 of the rotation stopper plate 14.

On the other hand, the conductor 2, crimp terminal 3, washer 7, and spring washer 6 attached to the screw 16 on the left side of the tightening rod are tightened and fixed by the nut 5 toward the bolt head 15.

Therefore, even if the nut 13 on the right side of the bolt head loosens, the nut 5 itself will not loosen due to this loosening, and each of the nuts 5 and 13 can function independently from each other.

Further, retightening of these nuts can be done from both sides of the main body of the connecting device, which is very convenient.

Note that the embodiments according to the present invention are not limited to the embodiments described above.

For example, instead of interposing the rotation stopper plate 14 between the insulating plate and the bolt head, it may be arranged between the conductor 2 and the bolt head.

Further, the recesses formed in the rotation stopper plate are not limited to those shown in the drawings, and the contour shape of the recesses can be freely selected.

According to the present invention, the contraction effect of the insulating plate does not have an adverse effect on the nut holding the conductor.

Fire accidents caused by poor contact can be reliably prevented, and maintenance and inspection can be easily performed.

[Brief explanation of drawings]

1 to 3 are a plan view, a side view, and a front view, respectively, showing a conventional conductor clamping structure. 4 to 6 are a plan view, a side view, and a front view showing an embodiment of the tightening device according to the present invention. 7 to 9 are a plan view, a side view, and a front view showing other embodiments. FIGS. 10 and 11 are a plan view and a side view illustrating an example of the rotation stopper plate. Moreover, FIGS. 12 to 13 are a front view and a side view showing an example of the tightening iron. 1...Insulating plate, 2...Conductor, 3...
...Crimp terminal, 14... Rotation stopper plate, 15.
...Bolt head, 16, 17... Stud screw, 5, 13... Nut, 18...
・Concavity.

Claims (1)

[Scope of Claims] 1. A tightening rod with stud screws protruding from the bolt head to the left and right, and a tightening nut through which one of the stud screws of the tightening rod penetrates and is screwed onto the stud screw. A conductor is tightened and fixed toward the bolt head, an insulating plate is tightened and fixed toward the bolt head by a tightening nut through which the other stud screw of the tightening iron is screwed, and the insulating plate is tightened and fixed toward the bolt head. A rotation stopper plate for the tightening iron is provided with a recess that engages with the bolt head, and another adjacent tightening iron passes through a part of the rotation stopper plate, and the rotation is stopped by the tightening irons together. A conductor tightening device configured to restrict the movement of the plates. 2. The conductor tightening device G according to claim 1, wherein the recess of the rotation stopper plate is a groove having a width approximately equal to or slightly larger than the width of the bolt head. Tightening device. 3. The conductor tightening device according to claim 1 or 2, wherein the rotation stopper plate is interposed between the insulating plate and the bolt head. 4. The conductor tightening device according to claim 1 or 2, wherein the rotation stopper plate is interposed between the conductor and the bolt head.