JPS6218015Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention involves mounting electrical equipment such as a transformer on the installation surface via a vibration isolating member, and attaching a gap adjustment ring to the external thread of the part of the foundation bolt extending from the installation surface. The present invention relates to a vibration-proof device for electrical equipment that is screwed together and that allows a predetermined gap to be easily secured between the equipment base and gap adjustment ring of the electrical equipment depending on the installation state of the equipment.

As shown in FIG. 1, a conventional vibration-proofing device for electrical equipment includes a vibration-proofing member 3 made of rubber on an embedded base 2 buried in a device installation surface 1, and a vibration-proofing device 3 made of rubber, which is attached to a transformer, a shunt reactor, etc. An electrical device 4 is mounted on the embedded base 2 via a vibration isolating member 3, and vibration transmission to the installation surface 1 of the electrical device 4 is suppressed. Also, equipment base 5 of electrical equipment 4
A bolt insertion hole 6 is transparently provided at the end of the bolt insertion hole 6, and a foundation bolt 7 buried in the ground is located below the bolt insertion hole 6, and an internal thread 8 is formed at the upper end of the foundation bolt 7. At the same time, the fixing bolt 11 is formed so that its upper end surface is flush with the installation surface 1, and is inserted into the bolt insertion hole 6 from above the device base 5 via the vibration-proof bushing 9 and the bushing retainer 10.
is screwed onto the internal screw 8 to fix the electrical equipment 4. Furthermore, a predetermined gap A is provided between the upper surface of the embedded base 2 and the equipment base 5 according to the compression state of the vibration isolating member 3. In order to achieve this, a liner 12 consisting of several plates of different thickness is welded and fixed, and this gap A absorbs small vibrations of the electrical equipment 4, suppresses large vibrations of the electrical equipment 4, and achieves a predetermined vibration resistance strength. I'm trying to get it. In addition, 13 is a main body installation metal fitting of the electrical equipment 4.

However, according to the conventional vibration-proofing device, due to variations in the vibration-proofing member 3, the installation surface 1 and the equipment base 5
Since it is difficult to maintain a constant gap B between the bottom surface of the Moreover, the gap A due to this liner 12
The adjustment cannot be carried out until after the equipment assembly is completed, and there is a drawback that a large number of equipment is required until the end. Further, after the installation of the electrical equipment 4 is completed, the vibration isolating member 3 is subjected to a phenomenon of sagging due to the operation of the equipment, but in this case, it is extremely difficult to secure a predetermined gap A. In addition, since the exposed portion of the fixing bolt 11 corresponding to the gap B between the installation surface 1 and the equipment base 5 becomes longer, the bending moment applied to the fixing bolt 11 increases.
There is a drawback that the diameter of the bushing 1 must be increased, and the anti-vibration bushing 9 and the bushing holder 10 also become larger.

This invention has been made with the above-mentioned points in mind, and next, this invention will be explained in detail with reference to FIG. 2 showing one embodiment thereof.

In Fig. 2, the same symbols as in Fig. 1 indicate the same things, and the difference is that the upper end of the foundation bolt 7' is led out from the installation surface 1, and the fixing bolt 11 is screwed into the led out part. An inner thread 8' and an outer thread 14 are formed, and a gap adjustment ring 15 is screwed onto the outer thread 14 so as to be adjustable in position, and a predetermined position is formed between the lower surface of the equipment base 5 and the upper end surface of the gap adjustment ring 15. This is because a gap A′ was formed. The gap adjustment ring 15 has several inward female threads formed on its peripheral wall, and by screwing the set screws 16 into these female threads, the gap adjustment ring 15 is fixed in position on the outer thread 14. It is a thing,
Moreover, this can be easily done from around the device.

Therefore, according to the embodiment, the gap between the equipment base 5 and the gap adjustment ring 15 can be freely adjusted by adjusting the position of the gap adjustment ring 15 with respect to the external screw 14, so that after the equipment installation is completed, Gap easily without using special equipment
A' can be secured, and even if the vibration isolating member 3 is sagging due to equipment operation, the gap A' can be easily adjusted according to the sagging, and the gap A' can be adjusted according to the equipment installation state. This prevents locking. In addition, since the upper end of the foundation bolt 7' is led out from the installation surface 1, the exposed part corresponding to the gap between the installation surface 1 and the equipment base 5 becomes the foundation bolt 7', and the bending moment to the fixing bolt 11 is reduced. Therefore, the diameter of the fixing bolt 11 can be reduced, and the anti-vibration bushing 9,
It is possible to downsize the bushing foot 10 and the like.

As described above, with the vibration-proof device for electrical equipment of this invention, electrical equipment is placed on the installation surface via the vibration-isolating member, and the transmission of vibration to the installation surface of the electrical equipment is suppressed, and an internal thread and an external thread are formed on the lead-out portion of the foundation bolt from the installation surface, and a fixing bolt is inserted into the equipment base and screwed onto the internal thread, and a gap adjustment ring is screwed onto the external thread so that its position can be freely adjusted, so that the gap between the equipment base and the gap adjustment ring can be adjusted by the gap adjustment ring, and a specified gap can be easily secured, and this gap can be easily adjusted according to the wear of the vibration-isolating member, preventing locking according to the installation state of the equipment.
Since the upper end of the foundation bolt is extended beyond the installation surface, the bending moment on the fixing bolt can be kept small, and the diameter of the fixing bolt can be reduced.

[Brief explanation of the drawing]

The drawings each show a cross-sectional view of a vibration-proof device for an electrical device, with FIG. 1 showing a part of a conventional example and FIG. 2 showing a main part of an embodiment of this invention. 1... Installation surface, 3... Vibration isolation member, 4... Electrical equipment, 5... Equipment base, 7'... Foundation bolt,
8'...Inner screw, 11...Fixing bolt, 14...
External thread, 15...Gap adjustment ring, A'...Specified gap.

Claims (1)

[Scope of utility model registration request] The electrical equipment is mounted on the installation surface via the vibration isolating member, the upper end of the foundation bolt is led out from the installation surface, an internal thread and an external thread are formed in the lead-out part, and a fixing bolt is attached to the internal thread. is inserted into and screwed into the equipment base of the electrical equipment, and a gap adjustment ring is screwed onto the external thread so that the position can be adjusted freely, and a predetermined gap is formed between the equipment base and the gap adjustment ring. Anti-vibration equipment for equipment.