JPS602846B2 - Earthquake-resistant closed switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an earthquake-resistant closed switchboard with improved screen-proofing properties.

An example of the frame structure of a closed electrical distribution board (hereinafter referred to as MESG) is shown in FIG.

The secondary MESG generally has low earthquake resistance because the frame structure around the drawer part of the housed electrical equipment 4 is difficult to reinforce with respect to other parts. In this case, possible measures to improve earthquake resistance include welding gussets to each corner of the frame, placing angles on diagonals, and making the bones of the frame thicker. However, these require processing on the frame itself, resulting in a large overall size, and the general shape cannot be easily modified. In particular, it is impossible to provide angles diagonally in the storage device loading/unloading section, as this would obstruct the loading and unloading of the storage devices. For this reason, one idea is to tighten the turnbuckle 8 in a sash-like manner as shown in Figure 2 to create a striped effect, and to remove it when pulling out the electrical equipment 4 so as not to obstruct the access. It was done. However, with ordinary turnbuckles, the workability of attaching and dismounting is poor, and the T-buckle portion becomes an obstacle in terms of space. It is also difficult to evenly tighten two diagonal lines. An object of the present invention is to extend a wire or rope diagonally across a square-shaped entrance for pulling out storage equipment, and tighten only one end of the wire or rope. To provide an earthquake-resistant closed power distribution board that has strong earthquake resistance due to the linear effect and does not hinder the taking in and out of storage equipment.

The present invention will be described below with reference to embodiments shown in the drawings. Third
4A to 6, a hook-shaped hook 110 provided at one end of one wire 9 is attached to a hook mounting plate 13 provided at the lower right corner in the drawing of the square-shaped entrance. , b.

This wire 9 is stretched over a round pin 12 which is provided at the upper left corner in the figure diagonally to the corner and has a recess into which the wire is placed. Then, the direction is changed to the right in the figure, and the wire is passed over the same pin 12 at the upper right corner in the figure, and the direction is further changed toward the lower left in the figure, and the wire is passed upward to the pin 12 at the lower left corner in the figure. .

Then, as shown in FIG. 5, it is passed through the hook stopper plate 15 and the cording plate 14 at a position near the corner where it is easy to work. FIG. 7 shows the structure of the hooked wire 9 used in the present invention. A hook-shaped hook 110 is attached to one end of the wire 9, and a hook-shaped hook 110 is attached to the other end, and the hook-shaped hook 110 is made of a screw and a stopper 21 having a square or hexagonal cross section as shown in FIG.
1 is attached. When the wire 9 is attached vertically to give tension, the square-shaped stopper 21 is inserted into the square hole of the stopper plate 15, and the nut 16 is screwed onto the threaded rod 20 that passes through the tightening plate 14 and emerges from the top. You can attach it vertically. In this way, just by turning the nut, you can tighten it with equal tension on the two diagonal corners. After applying tension in this way, if the wire 10 is fixed with the locking fittings 17 shown in FIG. 10 provided near each corner of the upper part, it is possible to install the wire 10 with the same tension in both diagonal directions. Yes, this also improves work efficiency.The wire 9 may also be a rope with sufficient strength.MESG has a frame structure, and the floor plate is bolted to the channel of the base, so transverse waves such as those caused by earthquakes are not transmitted from the outside. If this occurs, the upper part of the board will vibrate greatly, causing it to swing.

Therefore, in order to improve seismic characteristics, it is sufficient to restrain this vibration. If the upper part of the board vibrates, at a certain moment the length of one diagonal of the board's cross section increases, and the length of the other diagonal increases.
It shrinks. Therefore, as in the present invention, by using this wire and restraining the length of one diagonal line, vibrations can be suppressed and the seismic properties of the board as a whole can be improved.

On the other hand, when putting in and taking out the storage device 4, the hook 10 can be removed from the hook mounting plate 13 by simply loosening the tightening part shown in FIG. I won't give anything. As described above, the present invention
Conventionally, it was difficult to install a liner on the closing part of a storage device drawer due to lack of space, but we have installed a liner on the tension of a wire or rope, and while one end is locked, the other end is closed. When tightened, the tension is applied evenly to the diagonal lines that intersect with each other, so good earthquake resistance is achieved due to the uniform tension. Moreover, since it is easily removable, it is possible to It is possible to obtain an earthquake-resistant closed switchboard that does not obstruct access.

[Brief explanation of drawings]

Figure 1 is a side view of MESG in a typical closed switchboard, Figure 2
The figures are a view taken along the line A-A in Fig. 1, Fig. 3 is a front view showing an embodiment of an earthquake-resistant closed switchboard according to the present invention, Figs.
Figures 5 and 6 are partial views showing the appearance of Figure 3, respectively;
Fig. 7 is a front view of the wire used in the present invention, and Fig. 8 is a front view of the wire used in the present invention.
9 is an enlarged view showing a wire locking fitting used in the present invention. Turtle...Stored electrical equipment 9...Wire, 10...Hook 1, 11...Hookuro, 12...Pin, 13...
・Hook mounting plate, Tortoise 4...Vertical plate ~ 15...Hook rotation stopper plate (square hole), 16...Rotation stopper, 17...-Wire loosening prevention metal fitting, 18... ...Loosening bolt. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. In a closed switchboard that stores electrical equipment inside and has an opening for drawing out the electrical equipment on one side, pins provided at each of the three corners of the rectangular opening and the remaining corners of the opening A wire or rope, one end of which is secured to the corner, and which is successively stretched around a pin at the corner diagonal to this corner and pins at the other two corners, and the other end of this wire or rope. This includes a fastener that tightens and fixes the wire or rope near the pin that was last spanned, and a corner that has one end of the wire or rope locked and a corner other than the corner that has the pin that the other end of the wire or rope spans. An earthquake-resistant closed switchboard characterized in that it is provided with locking devices provided near two corners for integrally connecting the wire or rope to the opening structure.