JPS5838760Y2 - Bus duct connection device - Google Patents

Description

[Detailed description of the invention] The connection between the transformer and the bus duct is as shown in Figs. 1 and 2.
A was attached with screws.

However, in reality, there are variations in the height of the tank 1, so the height h of the bus duct 3 is not constant, and the other end of the bus duct 3
This makes it difficult to connect b to a control panel (not shown) connected thereto.

Conventionally, in order to adjust this height, a vertical long hole was provided in either the mounting seat 2 or the bus duct end 3a, and both were screwed together so that the height could be adjusted within the range of this long hole. was.

However, the bus duct 3 is relatively heavy, and when used for a long period of time, vertical gravity is applied to the tightening screw due to the vibration of the transformer, so the tightening screw descends in the elongated hole, causing the bus duct 3 to tilt. There was a risk of damage.

The present invention eliminates the above-mentioned drawbacks and provides a bus duct connection device that is less likely to be misaligned.

To explain the embodiment, in FIGS. 3 to 5, 4
2 is a cover for the tank of the transformer, and 2 is a plate-shaped mounting seat protruding from the cover 4 by welding, and has a rectangular shape to match the shape of the end of the duct 3.

The mounting seat 2 is provided with a round hole 2a larger than the mounting hole 3b so as to face the bolt insertion hole 3b at the end of the duct.

As shown in FIG. 6, 5 is an adjustment disk having the same shape as this round hole 2a, and is rotatably fitted into this round hole 2a.

The adjustment disc 5 is provided with an eccentric hole 5a for bolt insertion at a position g apart from its center, and by turning the adjustment disc 5 in the round hole 2a, the eccentric hole 5a is aligned with the disc 5. Draw concentric circles with radius g.

As shown in FIG. 5, the hole I/insertion hole 3b of the duct end 3a is a long hole that extends horizontally, and has a width that is sufficient to cover the lateral movement range of the eccentric hole 5a due to the rotation of the disk. has.

6 is a bolt 1 that communicates with the bolt passage hole 3b and the eccentric hole 2a, 7 is a tightening fitting (Nara l-) into which the bolt 6 is screwed;
8 is a washer having an outer diameter sufficient to cover the elongated hole 3b.

When installing the duct 3 on the mounting seat 2, determine the height of the duct 3 according to the height of the local control panel, and turn the adjustment disc 5 fitted into the end 3a of the duct to this height. The eccentric hole 5a is aligned with the elongated hole 3b at the end of the duct.

Next, the bolt 6 is connected to the elongated hole 3b and the eccentric hole 5a,
Screw the fastener 7 on the opposite side and attach the adjustment disc 5 to the duct end 3.
It is supported under pressure between a and the fastener 7.

In this case, the weight of the duct is applied to the eccentric hole 5a, and if the position of the eccentric hole 5a is other than directly above or below the disk, the disk 5 tends to rotate due to the weight of the duct.

In the present invention, as described above, the disc 5 is fitted into the round hole at the end of the duct and is supported with pressure from both sides, so that the contact area between the disc 5 and other members is on the circumferential surface of the disc 5. and both sides, increasing the contact area.

Furthermore, since the weight of the duct is applied to the contact surface between the lower part of the outer peripheral end surface of the disk and the lower part of the inner peripheral surface of the round hole, the contact pressure increases, and the resistance of this contact surface increases accordingly.

As shown in Figure 6, if the height of the disc 5 is adjusted so that the surface that contacts the fastener 7 rotates counterclockwise, the disc 5 will be tightened when it tries to rotate due to the weight of the duct. Since it rotates clockwise together with the metal fitting 7, the clamping pressure of the fastener increases, further increasing the crushing resistance of the disc.

As explained below, according to the present invention, with a simple configuration,
It is possible to provide a duct support device whose position is unlikely to shift.

[Brief explanation of drawings]

Fig. 1 is a front view of the embodiment of the present invention, Fig. 2 is a side view showing a part of it in cross section, Fig. 3 is a front view of the main part, Fig. 4 is a longitudinal sectional view thereof, and Fig. 5 is The rear view, FIG. 6, is a perspective view of the adjustment disc. 1; Electric equipment tank, 2; Mounting seat, 2a; Round hole, 3; Bus duct, 3b; Long hole, 5; Adjustment disc, 5a; Eccentric hole,
6; Bolt, 7; Fastener.

Claims (1)

[Scope of utility model registration request] In a bus duct connection device for screwing the end of a bus duct to a mounting seat in an electrical equipment tank, the mounting seat is provided with a round hole, has a circular shape with an outer diameter that is approximately the same as the inner diameter of the round hole, and has an eccentric hole. An adjustment disc is rotatably fitted into the round hole, and a long hole extending horizontally is provided at the end of the bus duct, and the eccentric hole of the adjustment disc and the long hole at the end of the bus duct are aligned and screwed. A bus duct connecting device characterized in that the adjustment disc is clamped between an end of the bus duct and a fastener by being stopped.