JP7409948B2 - Simple seismic attenuation device for power equipment - Google Patents

Description

The present invention relates to a simple seismic attenuation device that protects power equipment such as transformers from seismic motion.

A transformer, also called a transformer or a transformer, is a power device that uses an electromagnetic induction coil to step down the high voltage such as 6600V supplied by an electric power company to 100V or 200V, and is used in buildings, factories, etc. Many are installed.
Conventionally, in order to prevent the propagation of vibrations generated from the transformer, the transformer has been elastically supported using a vibration isolating material such as vibration isolating rubber. (See Patent Documents 1, 2, etc.)
For example, as shown in FIG. 11(a), a transformer 101 is installed on a pedestal 100, and the transformer 101 is elastically supported by a vibration isolating material 102 such as vibration isolating rubber or a spring damper built into the pedestal 100. 100 is installed on the floor 103. With this support structure, the transformer 101 is elastically supported on the floor 103, and as a result of the vibration of the transformer 101 being absorbed by the vibration isolating material 102, the vibration noise of the transformer 101 is not transmitted to the surroundings.

The pedestal 100 with this type of general vibration-proofing function includes an upper pedestal 100a for installing a transformer 101, a lower pedestal 100b for installing on a floor 103, and a barrier interposed between the two pedestals. A vibration damping material 102 is provided, and the vibration generated by the operation of the transformer 101 can be absorbed by the vibration damping material 102.
However, if a large earthquake or the like occurs, there is a risk that the transformer 101 will shake with a greater amplitude than expected. For example, as shown in FIG. 11(b), when the transformer 101 housed inside the cabinet 105 sways with an amplitude greater than expected, the upper part of the transformer 101 hits the side wall of the cabinet 105, causing the cabinet 105 to sway. This may cause damage to the transformer 101 or cause problems with the wiring of the transformer 101.
Therefore, the applicant of the present application previously proposed a seismic attenuation device for a transformer in which the upper part of the transformer is supported by a horizontally extending bolt arm and the bolt arm is supported by an elastic material in the following Patent Documents 3 and 4. is suggesting.

Japanese Patent Application Publication No. 8-8122 Japanese Patent Application Publication No. 2005-251842 JP2013-211510A Unexamined Japanese Patent Publication No. 2016-1656

The seismic attenuation devices described in Patent Documents 3 and 4 house a transformer inside a rectangular seismic frame assembled with steel materials, and provide a plurality of bolt arms inside the seismic frame via elastic materials. The structure is such that the upper part of the transformer is elastically supported by multiple bolt arms.
To provide a seismic attenuation device described in Patent Documents 3 and 4, which can suppress unexpected lateral shaking of the upper part of a transformer and prevent disconnection or short circuit of the upper part of the transformer due to earthquake vibrations. I was able to do that.

However, in the seismic attenuation devices described in Patent Documents 3 and 4, it is necessary to configure an earthquake-resistant frame that houses power equipment such as a transformer, and to elastically support the upper part of the transformer using bolt arms supported by this earthquake-resistant frame. However, there was a problem in that the seismic attenuation device itself required a large-scale structure, increasing equipment costs.

The present invention was created in view of the above problems, and is a simple structure that can reduce equipment costs in a structure that supports power equipment, and can reduce the amount of displacement transmitted to power equipment even when lateral shaking due to an earthquake acts. The purpose is to provide a simple seismic attenuation device for power equipment.

(1) In order to solve the above problems, a simple seismic attenuation device for power equipment according to the present invention is provided with a plurality of legs at the bottom and is applied to power equipment supported on a base member via the legs. A simple seismic attenuation device comprising: a base frame installed on the upper surface of a part of the base member where the legs are attached and fixed to the base member with fixing fittings; a support board integrated into the base frame so as to be arranged horizontally in an installed state; an adjustment plate detachably attached to the upper surface of the support board; and a part of the support board with the adjustment plate. A rod-shaped buffer member is provided that is erected at a distance and comes into contact with a bottom or a leg of the power equipment to support the bottom, and the leg of the power equipment is supported via the support substrate or the adjustment plate. It is characterized by:

The legs of the power equipment are supported by the support board or adjustment plate, and the rod-shaped buffer members support the bottom or legs of the power equipment, so if the power equipment shakes due to earthquakes or other shaking, the buffer members will Suppress shaking caused by earthquakes. Since the position where the legs of the power equipment are fixed on the support board or adjustment plate and the position where the bottom of the power equipment is supported by the buffer member are slightly shifted in the horizontal direction, it is possible to obtain the seismic attenuation effect by the buffer member. .
Since the power equipment can be attenuated, even if the power equipment shakes due to an earthquake, the amount of displacement caused by the shaking can be kept to a small level, and as a result, the wires connected to the power equipment can be prevented from breaking, which can prevent rupture of wiring connections. can be prevented. In addition, the simple seismic attenuation device of this embodiment has a simple structure, so it can be implemented at low cost and is easy to implement.

(2) In the simple seismic attenuation device for power equipment according to the present invention, a plurality of sets of holes each consisting of two through holes formed at a predetermined interval are formed in the adjustment plate, and the plurality of sets of holes are formed in the adjustment plate at predetermined intervals. The intervals between the pairs of through holes in the holes are formed at different intervals for each of the plurality of holes, and the vibration isolating member for the power equipment is provided by a mounting bracket inserted through any of the holes having different intervals. It is preferable that a bottom part of the vibration isolating member is fixed on the adjustment plate, an upper part of the vibration isolating member is fixed to the leg part, and the power equipment is supported via the vibration isolating member.

By supporting the power equipment through the vibration isolating member, the vibration isolating member absorbs vibrations generated by the power equipment while it is energized. Therefore, when power equipment is installed on a base member installed on the floor or the ground, it is possible to create a structure that makes it difficult for the vibrations of the power equipment to be transmitted to the floor or ground. It can provide a structure that is difficult to convey.
In the multiple sets of holes provided in the adjustment plate, the spacing between the through holes is made different, so even if the sizes of the vibration isolating members applied to power equipment are different, any of the multiple sets of holes The vibration isolating member can be attached using the Therefore, it is possible to provide a simple seismic attenuation device that can be applied to a wide variety of transformers equipped with vibration isolating members of different sizes.

(3) In the simple seismic attenuation device for power equipment according to (2) of the present invention, a long hole is formed in the adjustment plate, an insertion hole is formed in the support substrate, and the long hole and the The adjustment plate is detachably attached to the support substrate through a mounting fitting inserted through the insertion hole, and the mounting position of the adjustment plate relative to the support substrate can be changed by changing the insertion position of the mounting fitting with respect to the elongated hole. A configuration configured as follows can be adopted.

When attaching the simple seismic attenuation device of this embodiment to existing power equipment equipped with a vibration isolating member, the size of the vibration isolating member differs depending on the scale of the power equipment. In this case, the adjustment plate has a plurality of holes with different through-hole intervals, and the position of the adjustment plate is adjusted by changing the insertion position of the mounting bracket with respect to the long hole of the adjustment plate. It becomes possible to attach the vibration isolating member by using this. Therefore, it is possible to provide a simple seismic attenuation device that can be applied to various power equipment equipped with a wide variety of vibration isolating members and that can be reliably installed when attached to existing power equipment.

(4) In the simple seismic attenuation device for power equipment according to the present invention, the vibration isolating member includes an elastic member made of rubber or a coil spring, and a protrusion that is attached to the bottom of the elastic member and protrudes to both sides of the elastic member. A bottom plate is provided with a bottom plate having a through hole formed in both of the protrusions, and a through hole formed in both the protrusions is aligned with one of a plurality of holes formed in the adjustment plate. It is preferable that it is freely formed.

When attaching the simple seismic attenuation device of this form to existing power equipment equipped with a vibration isolating member, the size of the vibration isolating member differs depending on the scale of the power equipment, and the through-hole spacing of the bottom plate that supports the vibration isolating member differs. . In this case, the adjustment plate is provided with a plurality of holes having different through-hole intervals, and the position of the adjustment plate can be adjusted and aligned with the hole in the bottom plate using any one of these holes. Therefore, it is possible to provide a simple seismic attenuation device that can be applied to various power equipment equipped with a wide variety of vibration isolating members and that can be easily installed in existing power equipment.

The simple seismic attenuation device for power equipment of the present invention has a structure in which the legs of the power equipment are supported, and the bottom or legs of the power equipment are supported by a buffer member, so that the power equipment can be shaken by large tremors due to earthquakes, etc. , the amount of displacement due to shaking can be kept small. As a result, even when a large earthquake occurs, it is possible to provide a simple seismic attenuation device that can prevent disconnection of wiring connected to power equipment and can prevent rupture of wiring connections.

1 is a perspective view showing a transformer to which a simple seismic attenuation device according to a first embodiment of the present invention is applied. 2(a) is a front view, FIG. 2(b) is a side view, FIG. 2(c) is a plan view, and FIG. 2(d) is a perspective view. FIG. 3 is a perspective view showing the mounting structure of the simple seismic attenuation device when it is applied to a transformer together with a vibration isolating member with the adjustment plate removed. FIG. 3 is a front view showing the main parts of the mounting structure. FIG. 3 is a side view showing the main parts of the mounting structure. FIG. 3 is an exploded perspective view of the same mounting structure. FIG. 3 is a perspective view showing a state after the vibration isolating member and the leg are connected and fixed in the same mounting structure. FIG. 3 is a perspective view showing a first example in which the simple seismic attenuation device is applied to power equipment together with a small vibration isolating member using an adjustment plate. FIG. 7 is a perspective view showing a second example of the simple seismic attenuation device using an adjustment plate and applied to power equipment together with a medium-sized vibration isolating member. FIG. 7 is a perspective view showing a third example in which the simple seismic attenuation device uses an adjustment plate and is applied to power equipment together with a large vibration isolating member. FIG. 2 is a perspective view showing a transformer to which a simple seismic attenuation device according to a second embodiment of the present invention is applied. FIG. 3 is a partially enlarged perspective view showing a mounting structure in which the simple seismic attenuation device is applied to a transformer. A perspective view of the simple seismic attenuation device seen from one side. A perspective view of the simple seismic attenuation device seen from the other side. FIG. 13 is an exploded perspective view of the simple seismic attenuation device applied to the transformer as shown in FIG. 12. 16(a) is a side view, and FIG. 16(b) is a side view showing the shaking of the power equipment during an earthquake.

Hereinafter, a simple seismic attenuation device for power equipment according to a first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10. Note that in the drawings used in the following description, characteristic portions may be shown enlarged for convenience in order to make the characteristics easier to understand.

“First embodiment”
FIG. 1 shows an installation structure of a transformer (power equipment) 1 to which a simple seismic attenuation device A according to a first embodiment of the present invention is applied. Two base members 2 made of channel steel are installed horizontally and parallelly at a predetermined distance on the floor of a building where the transformer 1 is installed or on the floor of a housing such as a cabinet, and the transformer 1 is placed on top of them. is installed.
In the example shown in FIG. 1, the base member 2 is made of channel steel having a predetermined length and a U-shaped cross section, in which flanges 2B are formed on both sides in the width direction of a flat web 2A. The base member 2 is installed on the floor or the ground with the web 2A horizontal and the flanges 2B, 2B facing downward.

Although not shown in Figure 1, the environment in which the transformer 1 is installed can be any floor of a building, the roof floor, or a basement, or it can be transformed by constructing a foundation or floor of concrete on the ground outdoors. It can be used in various ways, such as when configuring a container storage or cabinet.
In any installation environment, the transformer 1 is fixed on a plurality of base members made of steel or the like while being supported by the base members. In FIG. 1, the installation location is not depicted, and only the state in which the transformer 1 is installed on the base members 2, 2 is depicted. Note that the base member 2 is not particularly limited, and may be made of U-shaped steel, L-shaped steel, H-shaped steel, or the like.

Installed on the two base members 2 is a tall transformer 1 in the shape of a substantially rectangular parallelepiped having four side walls 1A, and in the transformer 1 shown in FIG. Wiring portions and the like provided therein are omitted, and only the shape in which the flat ceiling portion 1B is present on the side wall 1A is shown as a schematic diagram. The transformer 1 is a power device that steps down a high voltage such as 6600V supplied from an electric power company to 100V or 200V using an internal electromagnetic induction coil.

The transformer 1 shown in FIG. A leg portion 3 made of steel is attached along the length direction. The leg part 3 is made of L-shaped steel material consisting of a bottom plate 3A and a side plate 3B, and the length of the leg part 3 along the length direction of the base member 2 is equal to the width of the transformer in the same direction. ing. One end 3D of the legs 3, 3 in the length direction is slightly protruded to the side of the transformer 1, and the other end is disposed below the bottom of the other side of the transformer 1. A simple seismic attenuation device A, which will be described below, is attached between the end portions 3D of these legs 3 and the base member 2. In the example of FIG. 1, the simple damping devices A are attached to both ends of the legs 3, 3, so the transformer 1 is supported by the base members 2, 2 via the four simple damping devices A.

The simple seismic attenuation device A consists of a base frame 5 installed on the web 2A of the base member 2, a support board 6 integrated on the base frame 5 by welding, etc., and an end of the support board 6. It has a rod-shaped buffer member 7 erected on the support board 6 and a disc-shaped adjustment plate 8 attached to the upper surface of the support substrate 6.

The base frame 5 stands on both sides of the flat plate part 5A in the form of a rectangular plate as shown in FIGS. 1 and 2 in the width direction (both sides in the width direction along the direction orthogonal to the length direction of the flat plate part 5A). It is made of U-shaped channel steel and has a flange-like side plate 5B. A through hole 5a is formed in the center of the flat plate part 5A in the width direction, at a position closer to one end in the length direction of the flat plate part 5A (see FIG. 2(d)). The flat plate part 5A of the base frame 5 is arranged along the center of the upper surface of the web 2A in the width direction with the side plate 5B facing upward, and the flat plate part 5A passes through the through hole 2a formed in the center of the width direction of the web 2A. The holes 5a are aligned (see FIG. 6). The base frame 5 is attached to the base member 2 by a fixing bolt (fixing metal fitting) 9 that passes through the through hole 2a of the web 2A and the through hole 5a of the flat plate part 5A, and a nut (fixing metal fitting) 9A that is screwed onto the fixing bolt 9. (see Figure 4).
4 and 6 are diagrams showing other usage forms of the simple seismic attenuation device A, which will be explained later. However, since the structure of the base frame 5 and other main parts are the same, the figures will be used as appropriate for the following explanation. 4. This will be explained with reference to FIG. 6 and the like.

As shown in FIGS. 2(a), 2(b), and 2(d), the support substrate 6 is made of a steel plate main body 6A that is integrated so as to cover the top of the base frame 5, and the length of the base frame 5. It has a side plate portion 6B extending from one end side of the substrate body 6A so as to cover the other end side in the direction (the left side in FIG. 2(b), the back side in FIG. 2(d)) from the top surface side to the side surface side. The side plate part 6B is formed to have the same thickness as the board main body 6A, and a thick part 6E is formed inside the boundary part between the board main body 6A and the side plate part 6B, and the boundary part is reinforced by the thick part 6E. .
The board main body 6A is made of a substantially rectangular steel plate in plan view and has a width approximately twice that of the base frame 5, and is integrated with the tip side of the side plate 5B in the base frame 5 by a joining means such as welding. has been done. The support substrate 6 is installed substantially horizontally when the base frame 5 is fixed along the upper surface of the web 2A. An insertion hole 6a is formed in the substrate body 6A at a position close to one end in the length direction of the base frame 5 (see FIG. 6). The insertion hole 6a is formed at a position corresponding to the center in the width direction of one end in the length direction of the base frame 5, and the insertion hole 6a has a round hole shape with an inner diameter slightly smaller than the interval between the side plates 5B, 5B in the base frame 5. It is formed.

As shown in FIG. 6, mounting holes 6b, 6b, which are screw holes for screwing in bolts, are formed on both sides of the insertion hole 6a on the upper surface of the board main body 6A. The mounting holes 6b, 6b are formed at positions sandwiching the center of the insertion hole 6a from both sides of the insertion hole 6a, and are formed at positions slightly inward from the corner portions of the board body 6A.
In the board main body 6A, mounting holes 6c, 6c, which are screw holes for screwing in bolts, are formed in a part of the corner side where the side plate part 6B is formed, and at a position inside the corner end of the board main body 6A. A support bolt 7A is threaded into one of the two mounting holes 6c and is threaded into the mounting hole 6c and inserted vertically through the mounting hole 6c. A disk-shaped head portion 7B having an outer diameter approximately 4 to 6 times larger than the shaft diameter of the support bolt 7A is fixed to the upper end of the support bolt 7A, and the head portion 7B is made of an elastic material such as rubber on the upper surface of the head portion 7B. A disk-shaped buffer layer 7C is fixed. Further, a nut 7D is screwed onto the lower end side of the support bolt 7A that passes through the attachment hole 6c and projects downwardly from the board main body 6A.
In this embodiment, the buffer member 7 includes a support bolt 7A, a head portion 7B, a buffer layer 7C, and a nut 7D.

The adjustment plate 8 is made of a disc-shaped steel plate having a diameter slightly smaller than the width of the substrate body 6A (width in the direction orthogonal to the length direction of the base frame 5). In a portion slightly inside the outer peripheral edge of the adjustment plate 8, arcuate long holes 8a, 8a are formed at symmetrical positions sandwiching the center of the adjustment plate 8 from both sides. The elongated hole 8a is formed in the shape of an arc having a circumferential angle of about 20 to 40 degrees on the surface of the disc-shaped adjustment plate 8. A center hole 8b for inserting a bolt is formed in the center of the adjustment plate 8.

In the adjustment plate 8, it is a region where the elongated holes 8a, 8a are not formed, and is a position along the first center line _L1 shown in FIG. 2(c) passing through the center of the adjustment plate 8. A screw hole type fixing hole 8c and a fixing hole 8d are formed at positions spaced apart from the fixing hole 8b by an equal first distance. These fixing holes 8c and 8d constitute a first set of holes 8e consisting of two fixing holes. Further, in the adjustment plate 8, it is a region where the elongated holes 8a, 8a are not formed, and is a position along the second diameter _L2 passing through the center of the adjustment plate 8, and an equal second diameter from the center hole 8b. A screw hole type fixing hole 8f and a fixing hole 8g are formed at positions separated by a distance. These fixing holes 8f and 8g constitute a second set of holes 8h consisting of two fixing holes.
In this embodiment, the second distance between the fixing holes 8f and 8d along the second center line _L2 is longer than the first distance between the fixing holes 8c and 8d along the first center line _L1 . is formed slightly longer. Further, the first center line _L1 and the second center line _L2 both pass through the center of the adjustment plate 8 (the center of the center hole 8b) and intersect at an angle of about 30 degrees. In this embodiment, two sets of assembling holes, including the first assembling hole 8e and the second assembling hole 8h, are provided in the adjustment plate 8.

The adjustment plate 8 is installed on the support substrate 6 with its center aligned with the center of the insertion hole 6a provided in the support substrate 6, and in this state, the length of the adjustment plate 8 is aligned with the attachment holes 6b of the support substrate 6. Holes 8a, 8a are aligned. The adjustment plate 8 is fixed onto the support substrate 6 by mounting bolts (mounting metal fittings) 12 that are inserted through the aligned elongated holes 8a and screwed into the mounting holes 6b.

The simple seismic attenuation device A configured as described above is assembled between the end 3D of the leg 3 and the base member 2, as shown in FIG. It is supported by base members 2, 2 via a seismic attenuation device A.
More specifically, as also shown in FIG. 6, the base frame 5 is screwed into a fixing bolt 9 that passes through the through hole 2a of the web 2A and the through hole 5a of the flat plate part 5A. It is fixed to the base member 2 with a nut 9A (see FIG. 4). Furthermore, the end 3D of the leg 3 of the transformer 1 is placed on the center of the upper surface of the adjustment plate 8 as shown in FIG. 1, and the through hole 3e formed in the end 3D and the center hole of the adjustment plate 8 The transformer 1 is supported and fixed to the base member 2 by a fixing bolt 10 passing through the fixing bolt 8b and a fixing nut (not shown) screwed onto the fixing bolt 10. Further, the buffer member 7 of the simple seismic attenuation device A elastically supports the transformer 1 with its upper end buffer layer 7C in contact with the bottom surface of the transformer 1.

The transformer 1 is a power device that steps down a high voltage such as 6600V supplied from an electric power company to a voltage such as 100V or 200V using an internal electromagnetic induction coil.
When the transformer 1 is about to undergo a large lateral shake due to earthquake vibrations, the base members 2, 2 support the transformer 1, and at the same time, the buffer member 7 elastically supports the bottom 1D of the transformer 1 via the buffer layer 7C. Therefore, the horizontal shaking of the transformer 1 can be suppressed.

Because the ground, building, floor, storage, cabinet, etc. on which the transformer 1 is installed also shake due to the vibrations of the earthquake, the base members 2, 2 that support the transformer 1 are also shaken in response to the earthquake vibrations. However, twisting may also occur. As a result, even if the transformer 1 is bolted to the base members 2, 2 via the four simple seismic attenuation devices A, each bolted part does not swing uniformly in the same direction, and the bolted parts do not swing uniformly in the same direction. It moves unevenly vertically or horizontally, causing twisting and bending. Here, each buffer member 7 elastically supports a portion of the transformer 1 that is horizontally displaced from a portion where the transformer 1 is bolted. Therefore, each buffer member 7 elastically supports the transformer 1 through the buffer layer 7C while being slightly out of phase with the bolted portion of the transformer 1 and shaking or twisting due to earthquake motion. Therefore, horizontal shaking of the transformer 1 due to earthquake motion can be suppressed.

3 to 7 show an embodiment in which the simple seismic attenuation device A described above is applied to the transformer 1 together with the vibration isolating member 13. The vibration isolating member 13 is provided to prevent vibrations associated with normal operation of the transformer 1 from being transmitted to the outside. A step-down electromagnetic induction transformer (not shown) is provided inside the transformer 1, and vibrations are generated in the transformer 1 when the electromagnetic induction transformer is energized.
In the configurations shown in FIGS. 3 to 7, the configuration for fixing the base frame 5 to the base member 2 is the same as in the previous embodiment. In the embodiment shown in FIGS. 3 to 7, the adjustment plate 8 on the support substrate 6 is removed by removing the mounting bolts 12, and instead, a vibration isolating member 13 for a transformer is attached on the support substrate 6. Since the adjustment plate 8 is attached to the support substrate 6 by the attachment bolts 12 as described above, it can be easily removed from the support substrate 6 by unscrewing the attachment bolts 12.
The vibration isolating member 13 includes an elastic member 13A such as a thick ring-shaped rubber, a bottom plate 13B integrated with the bottom of the elastic member 13A, a top plate 13C integrated with the top of the elastic member 13A, and a top plate 13B integrated with the bottom of the elastic member 13A. It has a bolt-shaped connecting shaft 13D that projects upward from the center of the upper surface of the plate 13C.

The bottom plate 13B is made of a metal plate having an oval shape in a plan view, and both ends of the bottom plate 13B protrude by a predetermined length to the sides of the elastic member 13A. Insertion holes 13f for inserting bolts are formed in the protrusions 13e at both ends of the bottom plate 13B. The distance between the centers of the insertion holes 13f, 13f formed at both ends of the bottom plate 13B is the same as the distance between the centers of the attachment holes 6b, 6b in the support substrate 6. The bottom plate 13B and the top plate 13C are attached to the lower and upper surfaces of the elastic member 13A, and are fixed by bonding means such as adhesive.
Note that in this embodiment, the elastic member 13A made of ring-shaped rubber is illustrated as an example, but the elastic member 13A may be made of another elastic body such as a coil spring. For example, the bottom plate 13B and the top plate 13C can be integrated by welding the lower and upper surfaces of the coil spring.

The vibration isolating member 13 is installed by installing the bottom plate 13B on the upper surface of the support substrate 6, aligning the insertion holes 13f, 13f of the bottom plate 13B with the mounting holes 6b, 6b of the support substrate 6, and installing the vibration isolation member 13 through the aligned insertion holes 13f. It is fixed onto the support substrate 6 by screwing a mounting bolt 12 into the hole 6b. The insertion hole 13f has an inner diameter that allows the mounting bolt 12 to be loosely inserted therein, and the mounting hole 6b has an inner diameter that allows the mounting bolt 12 to be screwed into it.
Further, the connecting shaft 13D of the vibration isolating member 13 is inserted into the through hole 3e formed in the upper leg 3, and by screwing the nut 16 onto the upper end side of the connecting shaft 13D, as shown in FIG. It is connected to the leg 3 of the transformer 1. With these structures, the legs 3 of the transformer 1 are supported by the base member 2 via the simple seismic attenuation device A.
Further, a tall nut 17 is screwed onto a support bolt 7A provided upright on the support board 6. The tall nut 17 is screwed onto the support bolt 7A so as to be in contact with the upper surface of the support substrate 6, and reinforces the joint portion of the support bolt 7A with the support substrate 6.

In the embodiment shown in FIGS. 3 to 7, the vibration isolating member 13 is installed on the support substrate 6, so that the distance between the bottom plate 3A of the leg part 3 and the support substrate 6 is has been enlarged. Therefore, in the configurations shown in FIGS. 3 to 7, the length of the support bolt 7A protruding above the support substrate 6 is longer than in the configurations shown in FIGS. 1 and 2.
When the transformer 1 shakes greatly due to earthquake vibrations, the bottom of the transformer 1 may apply considerable pressure to the upper ends of the support bolts 7A depending on the state of the shaking, and in some cases, the upper ends of the support bolts 7A may There is a risk that the bottom portion 1D of the device may be repeatedly subjected to large loads. For this reason, it is desirable to screw the tall nut 17 onto the lower end side of the support bolt 7A to reinforce the joint portion of the support bolt 7A. By providing the tall nuts 17, the support bolts 7A can be reinforced, and buckling or bending of the support bolts 7A due to loads applied during a large earthquake can be suppressed.

By the way, in general, the scale and shape of the transformer 1 vary, and a plurality of types of vibration isolating members are applied depending on the scale and shape of the transformer 1. 8, 9, and 10 show examples of application of the simple seismic attenuation device A when applied to vibration isolating members of different sizes.
FIG. 8 shows a configuration example in which a small-sized vibration isolating member 18 is applied, FIG. 9 shows a configuration example in which a medium-sized vibration isolating member 19 is applied, and FIG. 10 shows a configuration example in which a large-sized vibration isolating member 13 is applied. An example configuration is shown below. FIG. 10 shows an example of the structure in which the adjustment plate 8 is removed and the large vibration isolating member 13 is directly fixed to the support substrate 6, which has the same structure as the embodiment shown earlier based on FIGS. 3 to 7. ing. The structure shown in FIG. 10 differs only in that a short nut 21 is screwed onto the support bolt 7A instead of the tall nut 17.
When installing a large vibration isolating member 13 as shown in FIG. 10, the distance a between the insertion holes 13f and 13f in the bottom plate 13B is the same as the distance between the mounting holes 6b and 6b of the support board 6, so the adjustment plate 8 is removed. The vibration isolating member 13 can be directly attached to the supporting substrate 6.

On the other hand, the small vibration isolating member 18 shown in FIG. 8 and the medium sized vibration isolating member 19 shown in FIG. 9 are similar in structure to the large vibration isolating member 13, but each part is formed smaller in size. .
The vibration isolating member 18 includes an elastic member 18A, a bottom plate 18B, a top plate 18C, and a connecting shaft 13D. The elastic member 18A has the same wall thickness as the elastic member 13A of the vibration isolating member 13, but its outer diameter is approximately half that of the elastic member 13A of the vibration isolating member 13. The bottom plate 18B and the top plate 18C of the vibration isolating member 18 are formed smaller than the bottom plate 13B and the top plate 13C of the vibration isolating member 13, respectively. However, the length and diameter of the connecting shaft 18D of the vibration isolating member 18 are the same as the connecting shaft 13D of the vibration isolating member 13.
The vibration isolating member 19 includes an elastic member 19A, a bottom plate 19B, a top plate 19C, and a connecting shaft 19D. The elastic member 19A has the same wall thickness as the elastic member 13A of the vibration isolating member 13, but has an outer diameter of about 70%. The bottom plate 19B and the top plate 19C of the vibration isolating member 19 are formed to be slightly smaller than the bottom plate 13B and the top plate 13C of the vibration isolating member 13, respectively. However, the length and diameter of the connecting shaft 19D are the same as those of the connecting shaft 13D.

Due to the above-described configuration, the center distance b between the through holes 19f and 19f in the medium-sized vibration isolating member 19 is smaller than the center distance a between the insertion holes 13f and 13f in the large vibration isolating member 13. Further, in the small-sized vibration isolating member 18, the center distance c between the through holes 18f, 18f is smaller than the center distance b of the medium-sized vibration isolating member 19.
In this way, the simple seismic attenuation device A can be applied to any of the vibration isolating members 13, 18, and 19 of different sizes.

When attaching a large vibration isolator 13 to the simple seismic attenuation device A, the adjustment plate 8 is removed and the vibration isolator 13 is installed using the mounting holes 6b and 6b as shown in FIGS. 3 to 7 or 10. Attach.
When attaching the medium-sized vibration isolating member 19, the simple seismic attenuation device A fixes the adjustment plate 8 on the support substrate 6 as shown in FIG. The vibration isolating member 19 can be fixed using the fixing hole 8f and the fixing hole 8g. That is, by aligning the through holes 19f, 19f formed in the bottom plate 19B of the vibration isolating member 19 with the fixing holes 8f, 8g, and screwing the mounting bolts 12, 12 into these fixing holes 8f, 8g, vibration isolation is achieved. The member 19 can be fixed to the adjustment plate 8.

When applying the small-sized vibration isolating member 18, the simple seismic attenuation device A fixes the adjustment plate 8 on the support substrate 6 as shown in FIG. The vibration isolating member 18 can be fixed using the hole 8c and the fixing hole 8d. That is, by aligning the through holes 18f, 18f formed in the bottom plate 18B of the vibration isolating member 18 with the fixing holes 8c and 8d, and screwing the mounting bolts 12, 12 into these fixing holes 8c, 8d, vibration isolation is achieved. The member 18 can be fixed to the adjustment plate 8.

The base frame 5 installed below the adjustment plate 8 is made of channel steel and has a flat plate portion 5A and side plates 5B, 5B. Therefore, when the mounting bolt 12 is screwed into any of the fixing holes 8c, 8d, 8f, and 8g of the adjustment plate 8 and the tip of the mounting bolt 12 protrudes below the adjustment plate 8, the mounting bolt 12 It is necessary to avoid interference between the side plates 5B and 5B. The adjustment plate 8 is fixed onto the support substrate 6 via a mounting bolt 12 that is inserted through an arcuate long hole 8a and screwed into the mounting hole 6b. By loosening these mounting bolts 12, the adjustment plate 8 can be rotated by a predetermined angle on the support substrate 6.

By adjusting the rotation angle of the adjustment plate 8 as shown in FIG. 8, the fixing holes 8c and 8d of the first set of holes 8e can be aligned to the intermediate position between the side plates 5B, 5B of the base frame 5. I can do it. In this state, the vibration isolating member 18 can be fixed using the fixing holes 8c and 8d of the first set of holes 8e formed in the adjustment plate 8. In the structure of FIG. 8, the lower ends of the mounting bolts 12 pass through the fixing holes 8c and 8d and protrude below the support board 6, but the lower ends of the mounting bolts 12 pass through the insertion holes 6a of the support board 6 and are attached to the base. It is located between the side plates 5B and 5B of the stand frame 5.

By adjusting the rotation angle of the adjustment plate 8 as shown in FIG. 9, the fixing holes 8f and 8g of the second set of holes 8h can be aligned to the intermediate position between the side plates 5B, 5B of the base frame 5. I can do it. In this state, the vibration isolating member 18 can be fixed using the fixing holes 8f and 8g of the second set of holes 8h formed in the adjustment plate 8. In the structure of FIG. 9, the lower ends of the mounting bolts 12 pass through the fixing holes 8f and 8g and protrude below the support board 6, but the lower ends of the mounting bolts 12 pass through the insertion holes 6a of the support board 6 and are inserted into the base plate 6. It is located between the side plates 5B and 5B of the stand frame 5.
The mounting position of the adjustment plate 8 shown in FIG. 8 and the mounting position of the adjustment plate 9 shown in FIG. 9 can be easily changed by rotating the adjustment plate 8 to change the position of the mounting bolt 12 with respect to the elongated hole 8a. can do.

As shown in FIG. 8, the mounting bolts 12 on the near side are located on the back side of the long holes 8a on the near side, and the mounting bolts 12 on the back side are located on the near side of the long holes 8a on the back side. When the adjustment plate 8 is arranged, the fixing holes 8c and 8d of the first set of holes 8e are aligned at the center position between the side plates 5B and 5B of the base frame 5, as shown in FIGS. 2(c) and 2(d). It looks like this.
As shown in FIG. 9, the mounting bolts 12 on the near side are located on the front side of the long holes 8a on the front side, and the mounting bolts 12 on the back side are located on the back side of the long holes 8a on the back side. When the adjustment plate 8 is arranged, the fixing holes 8f and 8g of the second set hole 8h are lined up at the center position between the side plates 5B and 5B of the base frame 5.
Therefore, even if a small-sized vibration isolating member 18 is installed as shown in FIG. 8, or a medium-sized vibration isolating member 19 is installed as shown in FIG. The length direction of the base frame 5 can be aligned with the length direction of the base frame 5, and the base frame 5 can be accurately attached.

The simple seismic attenuation device A of this embodiment can be applied to any of three types of vibration isolating members 18, 19, and 13 of different sizes as shown in FIGS. 8 to 10. Therefore, the simple seismic attenuation device A can be reused to match transformers of various sizes with different sizes of vibration isolating members, and thus has a feature of excellent versatility.
Note that the first assembly hole 8e and the second assembly hole 8h shown in the embodiments described so far are just one example, and the number of assembly holes provided in the adjustment plate 8 is arbitrary. Although it depends on the size of the adjustment plate 8, a third assembly hole and a fourth assembly hole may be further provided.
When the number of holes to be provided in the adjustment plate 8 is increased, the long arc-shaped holes 8a are formed longer so that the adjustment plate 8 can be rotated by a larger angle, and the number of holes in the adjustment plate 8 is increased according to the number of holes. The configuration may be such that the positions of the through holes can be aligned by changing the rotation angle.

"Load calculation"
As an example, oil-immersed transformers with a rated capacity of 75 kVA to 500 kVA are widely used. Considering a 500 kVA oil-immersed transformer among these, it can be estimated that the external dimensions are 1150 mm (X) x 680 mm (Y) x 1290 mm (Z) and the mass is approximately 1810 kg. Consider the case where an earthquake with a horizontal seismic intensity of 2G acts on this transformer. In the case of this transformer, the installation dimensions of the transformer shown in FIG. 11(a) are assumed to be Xs: 600 mm and Ys: 600 mm.

The load Ma acting on the center of gravity G of the transformer can be calculated as follows.
F=Ma=1810kg×2G=3620kg
The load T acting on the transformer leg due to the overturning moment F can be calculated as follows, assuming that the height of the center of gravity G is _hG .
T=(F× _hG )/Xs={3620kg×(1290mm/2)}/600mm
≒3900kg
When the transformer is supported by legs at four locations as shown in FIG. 1, the load is received at two locations on one side, so the load T acting on one leg can be calculated as shown in the following equation.
T=(3900kg/2)=1950kg

Considering the safety margin, it can be estimated to be 2000 kg. From this calculation result, in the simple seismic attenuation device A, if a load of 2000 kg is applied to the corner part of the board main body 6A near the side plate 6B, if no problem occurs to the board main body 6A, the board main body 6A will have a It turns out that there is no problem.
In the plan view shown in Fig. 2(c), the steel support substrate is 185 mm wide x 170 mm deep, and 55 mm high, and a 3D model calculation is performed using 3D/CAD software for mechanical design provided by Dassault Systemes SolidWorks Corporation. A static analysis was performed.

As a result of static analysis, it was found that a maximum stress of 192 N/mm ² acts on the corner portion of the substrate main body 6A near the side plate portion 6B, and the maximum value of the corner portion displacement is 0.07 mm. From the results of this static analysis, it can be seen that when the support board 6 of the simple seismic attenuation device A is applied to a 500 kVA oil-immersed transformer, there will be no problem even if a horizontal seismic intensity of 2 G is applied.

"First seismic response calculation"
For the above-mentioned 500kVA transformer, the case where no seismic attenuation is performed, the case where the applicant of this application has previously applied for a patent in JP-A-2013-211510, a seismic attenuation device (TTR device), and the case shown in Figs. 3 to 7 Earthquake response calculations were performed for a simple seismic attenuation device with the structure shown.
In JMA Kobe (Nakayamate strong motion waveform in Kobe Chuo Ward during the 1995 Southern Hyogo Prefecture Earthquake), the acceleration of the EW component is 617 Gal, and the acceleration of the UD component is 332 Gal. When this seismic wave acts on the transformer, a dynamic analysis was performed using MathWorks' numerical analysis software regarding the displacement at the secondary terminal provided on the transformer ceiling.
As a result, when a simple seismic attenuation device is not installed, the EW component displacement in the longitudinal direction of the transformer: 43.8 mm, the UD component displacement in the longitudinal direction 9.9 mm, the EW component displacement in the lateral direction of the transformer: 63.3 mm, the short The manual direction UD component displacement is 11.9 mm.

On the other hand, when a seismic attenuation device (TTR device) for which a patent application has been filed in JP-A No. 2013-211510 is provided, the longitudinal EW component displacement of the transformer is 7.6 mm, and the longitudinal UD component displacement is 2.6 mm. 0 mm, EW component displacement in the lateral direction of the transformer: 7.6 mm, and UD component displacement in the lateral direction 1.9 mm. It can be seen that the simple seismic attenuation device of the present invention can exhibit about 50% of the seismic attenuation effect of a seismic attenuation device (TTR device).

On the other hand, when a simple seismic attenuation device with the configuration shown in Figs. 3 to 7 is installed, the longitudinal direction EW component displacement of the transformer: 21.0 mm, the longitudinal direction UD component displacement 9.9 mm, and the transverse direction of the transformer. EW component displacement: 29.3 mm, longitudinal direction UD component displacement 9.9 mm, and transverse direction UD component displacement 8.6 mm.

When the simple seismic attenuation device according to the present invention was provided, the amount of displacement at the secondary terminal portion could be suppressed to about 50% compared to the case where no seismic attenuation device was provided. The seismic attenuation device (TTR device) for which a patent application has been filed in Japanese Patent Application Laid-Open No. 2013-211510 exhibits excellent performance that can suppress the amount of displacement at the secondary terminal to about 10%, but it is much simpler. It can be seen that even with the simple seismic attenuation device according to the present invention having a simple structure, a reliable seismic attenuation effect can be obtained.

"Second seismic response calculation"
For the 500 kVA transformer of the size mentioned above, the case where no vibration attenuation is performed, the case where the applicant of the present application has previously applied for a patent in JP 2013-211510 specification (TTR device), and Fig. 3 ~ Earthquake response calculations were performed for the seismic attenuation device with the structure shown in Figure 7.
For the 3.11 Haga wave caused by the 2011 Tohoku Pacific Earthquake, the acceleration of the EW component is 1197 Gal, and the acceleration of the UD component is 808 Gal. When this seismic wave acts on the transformer, we dynamically analyzed the displacement at the two-figure terminal provided on the transformer ceiling using numerical analysis software from MathWorks.

As a result, when a simple seismic attenuation device is not installed, the longitudinal direction EW component displacement of the transformer: 55.6 mm, the longitudinal direction UD component acceleration: 9065 Gal, the displacement 14.6 mm, and the transverse direction EW component acceleration of the transformer: 12659 Gal. , displacement: 82.7 mm, lateral direction UD component acceleration: 5855 Gal, displacement 16.9 mm.

On the other hand, when a seismic attenuation device (TTR device) for which a patent application has been filed in JP-A No. 2013-211510 is provided, the longitudinal EW component displacement of the transformer is 15.0 mm, and the longitudinal UD component displacement is 3.0 mm. 7 mm, EW component displacement in the lateral direction of the transformer: 15.0 mm, and UD component displacement in the lateral direction 3.7 mm. It can be seen that when a seismic attenuation device (TTR device) is installed, a large seismic attenuation effect can be achieved.

On the other hand, when a simple seismic attenuation device with the configuration shown in Figs. 3 to 7 is installed, the longitudinal direction EW component displacement of the transformer: 34.0 mm, the longitudinal direction UD component displacement 17.6 mm, and the transverse direction of the transformer. EW component displacement: 69.8 mm, lateral direction UD component displacement: 19.4 mm.
When the simple seismic attenuation device according to the present invention was provided, the amount of displacement at the secondary terminal portion could be suppressed to about 30 to 40% compared to the case where no seismic attenuation device was provided.

The seismic attenuation device (TTR device) for which a patent application has been filed in JP-A No. 2013-211510 shows excellent performance in suppressing the amount of displacement at the secondary terminal to about 10%, but it is much simpler. It can be seen that even with the simple seismic attenuation device according to the present invention having a simple structure, a reliable seismic attenuation effect can be obtained.

“Second embodiment”
FIG. 11 shows an installation structure of a transformer (power equipment) 1 to which a simple seismic attenuation device B according to a second embodiment of the present invention is applied. Two base members 2 made of channel steel are installed horizontally and parallelly at a predetermined distance on the floor of a building where the transformer 1 is installed or on the floor of a housing such as a cabinet, and the transformer 1 is placed on top of these two base members 2 made of channel steel. is installed. As explained in the first embodiment, the transformer 1 is a power device that steps down a high voltage such as 6600V supplied from a power company to 100V or 200V using an internal electromagnetic induction coil. It is.
In the embodiment shown in FIG. 11, simple vibration damping devices B are attached to both ends of the legs 3, 3, and the transformer 1 is supported by the base members 2, 2 via four simple damping devices B.

The simple seismic attenuation device B consists of a base frame 25 installed on the web 2A of the base member 2, a support board 26 integrated on the base frame 25 by welding, etc., and an end of the support board 26. It has a rod-shaped buffer member 27 erected on the support board 26 , and a rectangular plate-shaped adjustment plate 28 attached to the upper surface of the support substrate 26 .

The base frame 25 is made of U-shaped channel steel consisting of a rectangular plate-shaped flat plate part 25A and flange-shaped side plates 25B erected on both sides of the flat plate part 25A in the width direction, as shown in FIGS. 11 to 15. Become. A slit portion 25a is formed at a position closer to one end in the length direction of the flat plate portion 25A and at the center in the width direction of the flat plate portion 25A (see FIGS. 12 and 13). The flat plate part 25A of the base frame 25 is arranged along the center of the upper surface of the web 2A in the width direction with the side plate 25B facing upward, and the through hole 2a formed in the center of the width direction of the web 2A and the slit of the flat plate part 25A. The portion 25a is aligned. The base frame 25 is attached to the base by fixing bolts (fixing metal fittings) 29 that pass through the through holes 2a of the web 2A and the slits 25a of the flat plate part 25A, and nuts (fixing metal fittings) not shown that are screwed into the fixing bolts 29. It is fixed to member 2 (see FIGS. 12 and 15).

With the side plates 25B and 25B of the base frame 25 facing upward as shown in FIGS. 12 to 15, a support substrate 26 is integrated with the tip sides of the side plates 25B and 25B by a joining method such as welding. An extension frame 25D made of an L-shaped steel piece is provided to extend one end of the base frame 25 in the length direction, and the extension frame 25D connects the end of the base frame 25 and the end of the support board 26. They are integrated by joining methods such as welding along the lines. As shown in FIGS. 12 to 14, the bottom surface of the extension frame 25D is flush with the bottom surface of the flat plate portion 25A, so when the base frame 25 is installed on the top surface of the web 2A as shown in FIG. The bottom surface of the extension frame 25D also contacts the top surface of the web 2A. This improves the mounting stability of the base frame 25.
The length of the support substrate 26 along the width direction of the base frame 25 is slightly longer than the width of the base frame 25 and approximately the same length as the width of the base member 2.

An adjustment plate 28 having the same shape as the support substrate 26 in plan view is installed on the support substrate 26, and the support substrate 26 and adjustment plate 28 are integrated by bolts 30 passing through their four corner portions. There is. Screw holes 28a are formed in the corners of the adjustment plate 28, and bolts 30 passing through the through holes 26a in the corner parts of the support substrate 26 are screwed into these screw holes 28a, so that the support substrate 26 and the adjustment plate 28 are connected. They are integrated in an overlapping state. A through hole 26b is formed in the center of the support substrate 26, and the fixing bolt 29 is inserted through the through hole 26b into the through hole 2a of the web 2A.

Screw holes 28c for attaching any of the vibration isolating members 13, 18, and 19 used in the first embodiment are formed at both lengthwise ends of the adjustment plate 28 and at the widthwise center of the adjustment plate 28. There is. When attaching the vibration isolating member 13, the vibration isolating member 13 is attached by passing through the through hole 13f formed in the bottom plate 13B of the vibration isolating member 13 and screwing the mounting bolt 12 into the screw hole 28c. When attaching the vibration isolating member 18, the vibration isolating member 18 is attached by inserting the through hole 18f formed in the bottom plate 18B and screwing the mounting bolt 12 into the screw hole 28c. When attaching the vibration isolating member 19, the vibration isolating member 19 is attached by inserting the through hole 19f formed in the bottom plate 19B and screwing the mounting bolt 12 into the screw hole 28c.
Since the sizes between the through holes of the vibration isolating members 13, 18, and 19 are different, the adjustment plate 28 can be adjusted by preparing an adjustment plate 28 with a length (width) that matches the vibration isolating members 13, 18, and 19, and replacing it. Any size of the vibration isolating members 13, 18, 19 can be accommodated by replacing them.

A threaded cylinder 35 is integrated into the center of the upper surface of the extension frame 25D, and a support bolt 7A similar to the first embodiment is screwed into a threaded hole formed on the inner circumference of the threaded cylinder 35. has been done. The support bolt 7A includes a head portion 7B and a buffer layer 7C, and projects upward from the threaded cylinder 35. Further, a reinforcing nut 36 is screwed onto the support bolt 7A.
In the second embodiment, the buffer member 7 includes a threaded cylinder 35, a support bolt 7A, a head portion 7B, and a buffer layer 7C. Moreover, two reinforcing ribs 37 are integrated by welding or the like on the upper surface of the extension frame 25D at positions sandwiching the threaded cylinder 35, thereby reinforcing the extension frame.

The simple seismic attenuation device B configured as described above is attached between the end 3D of the leg 3 and the base member 2, as shown in FIG. It is supported by base members 2, 2 via a seismic attenuation device B.
More specifically, as shown in FIGS. 12 and 15, the base frame 25 is screwed into the fixing bolt 9 that passes through the through hole 2a of the web 2A and the slit portion 25a of the flat plate portion 25A. It is fixed to the base member 2 by a nut (not shown). Further, the end portion 3D of the leg portion 3 of the transformer 1 is supported at the center of the upper surface of the adjustment plate 28 via a vibration isolating member 13, as shown in FIG. The vibration isolating member 13 has a connecting shaft 13D formed on the bottom plate 3A of the leg portion 3. By inserting it into the through hole 3e and screwing the nut 16 onto the connecting shaft 13D, it is connected to the leg portion 3 of the transformer 1 as shown in FIGS. 11 and 12.
Further, the buffer member 7 of the simple seismic attenuation device B elastically supports the transformer 1 with its upper end buffer layer 7C in contact with the bottom surface of the bottom plate 3A of the leg portion 3.

In a structure provided with a simple seismic attenuation device B, if a large lateral vibration is to be caused in the transformer 1 due to earthquake vibration, the base members 2, 2 support the transformer 1, and at the same time, the buffer member 7 supports the buffer layer 7C. Since the bottom portion 1D of the transformer 1 is elastically supported through the bottom portion 1D, horizontal shaking of the transformer 1 can be suppressed similarly to the structure of the first embodiment.

Because the ground, building, floor, storage, cabinet, etc. on which the transformer 1 is installed also shake due to the vibrations of the earthquake, the base members 2, 2 that support the transformer 1 are also shaken in response to the earthquake vibrations. However, twisting may also occur. As a result, even if the transformer 1 is bolted to the base members 2, 2 through four simple seismic attenuation devices B, each bolted part does not swing uniformly in the same direction, and the bolted parts do not swing uniformly in the same direction. It moves unevenly vertically or horizontally, causing twisting and bending. Here, the buffer member 7 of each simple seismic attenuation device B elastically supports a portion that is horizontally displaced along the leg portion 3 from the portion where the transformer 1 is bolted. Therefore, each buffer member 7 elastically supports the transformer 1 through the buffer layer 7C while being slightly out of phase with the bolted portion of the transformer 1 and shaking or twisting due to earthquake motion. Therefore, horizontal shaking of the transformer 1 due to earthquake motion can be suppressed.

In the simple seismic attenuation device B having the structure shown in FIGS. 11 to 15, a plurality of adjusting plates 28 of different lengths are prepared, and if the adjusting plates 28 are to be used properly, vibration isolating members 18, 19 of different sizes are prepared. It can be applied to any of the following.

A, B...Simple seismic attenuation device, 1...Transformer (power equipment), 2...Base member, 3...Legs, 3A...Bottom plate, 3B...Side plate, 3e...Through hole, 5...Base frame, 6...Support Substrate, 7...Buffer member, 7A...Support bolt, 7B...Head portion, 7C...Buffer layer, 7D...Nut, 8...Adjustment plate, 8a...Elongated hole, 8c, 8d...Fixing hole, 8e...First set hole , 8f, 8g...Fixing hole, 8h...Second assembly hole, 9...Fixing bolt (fixing metal fitting), 9A...Nut (fixing metal fitting), 12...Mounting bolt (mounting metal fitting), 13...Vibration isolating member, 13A... Elastic member, 13B...bottom plate, 13C...top plate, 13D...connection shaft.

Claims (4)

A simple seismic attenuation device that has a plurality of legs on the bottom and is applied to power equipment that is supported on a base member via the legs,
A base frame installed on the upper surface of a part of the base member where the legs are attached and fixed to the base member by a fixing fitting, and a base frame arranged horizontally when the base frame is attached to the base member. a support board integrated into the base frame; an adjustment plate detachably attached to the upper surface of the support board; and a part of the support board erected apart from the adjustment plate; For power equipment, comprising a rod-shaped buffer member that comes into contact with the bottom or legs of the equipment to support the bottom, and the legs of the power equipment are supported via the support substrate or the adjustment plate. A simple seismic attenuation device. A plurality of sets of holes are formed in the adjustment plate, each set of two through holes being formed at a predetermined interval, and the distance between the sets of two through holes in the plurality of holes is equal to The bottom part of the vibration isolating member for power equipment is fixed on the adjustment plate by a mounting bracket that is formed at different intervals for each set of holes, and is inserted through one of the set holes having the different intervals, and the bottom part of the vibration isolating member for the power equipment is fixed on the adjustment plate. The simple seismic attenuation device for power equipment according to claim 1, wherein an upper portion is fixed to the leg portion and the power equipment is supported via the vibration isolating member. An elongated hole is formed in the adjustment plate, and an insertion hole is formed in the support substrate, and the adjustment plate is detachably attached to the support substrate via a mounting fitting inserted through the elongation hole and the insertion hole. 3. The simple seismic attenuation device for power equipment according to claim 2, wherein the mounting position of the adjustment plate relative to the support substrate can be changed by changing the insertion position of the mounting bracket into the elongated hole. The vibration isolating member includes an elastic member made of rubber or a coil spring, and a bottom plate that is attached to the bottom of the elastic member and has protrusions that protrude to both sides of the elastic member, and both of the protrusions have through holes. 4. The power source according to claim 3, wherein the through hole formed in both of the protrusions is formed in one of the plurality of holes formed in the adjustment plate so as to be freely aligned. Simple seismic attenuation device for equipment.

Images