JP6939295B2 - Board - Google Patents

Description

The present invention relates to a board. More specifically, a panel provided with a box-shaped housing such as a control panel, a distribution board, a power panel, and a distribution board and internal devices housed therein, and suppresses vibration inside the housing of the internal devices. Regarding.

Devices abbreviated as panels such as control boards, switchboards, power boards, and distribution boards are necessary to perform the functions required for the boards, such as inverters, converters, transformers, circuit breakers, capacitors, and coils. Various electric devices are housed in a box-shaped housing. A general housing has a structure in which a frame called a board frame for structurally maintaining its shape is surrounded by sheet metal for the safety of surrounding workers and the protection of internal electrical equipment ( For example, see Patent Document 1).

In order to protect the internal electrical equipment from vibrations caused by earthquakes and transportation, the panel is required to take measures against vibrations such as seismic resistance, vibration control, and seismic isolation. Here, as the vibration damping structure of the board, for example, it is conceivable to change the thickness of a part of the frame of the housing and change the resonance frequency of the part that vibrates greatly. However, steel is often used for the frame, and steel has a small internal damping, and it is difficult to reduce the thickness in order to lower the natural frequency from the viewpoint of strength. Also, increasing the thickness to increase the natural frequency of the frame increases the overall weight and thus the cost. Therefore, as measures against vibration of the board, 1. 2. Have effective vibration control and seismic isolation functions. 2. Have appropriate strength. Low cost, 4. 5. Do not interfere with the layout inside the housing. It is preferable to meet all vibration damping requirements such as easy maintenance.

Further, for example, in Patent Document 2, an inner housing whose upper and lower sides are supported by a viscoelastic body is provided inside the box-shaped outer housing, and the electric device to be protected is provided in the inner housing. Structural boards have been proposed. According to the board of Patent Document 2, by supporting the inner housing via a viscoelastic body, it is possible to efficiently attenuate the vibration transmitted to the electric device inside the inner housing.

Japanese Unexamined Patent Publication No. 2008-148421 Japanese Unexamined Patent Publication No. 2007-21916

However, although the viscoelastic body can improve the vibration damping property, for example, when a transformer or a capacitor is protected, the viscoelastic body is not strong enough to suppress the shaking of these heavy objects, so that peripheral cables may be broken. There is. That is, among the above five damping requirements, 1. And 2. Cannot fully meet the requirements of.

An object of the present invention is to provide a board that meets appropriate vibration damping requirements for protecting electrical equipment inside a housing.

(1) The board (for example, the inverter boards 1 and 1A described later) is attached to a box-shaped housing (for example, the housing 2 described later) and the bottom of the housing (for example, the rail members 26a and 26b described later). An provided pedestal portion (for example, a pedestal portion 27 described later) and an internal device (for example, a lower portion 31 described later) provided inside the housing and having a lower portion (for example, a lower portion 31 described later) fixed to the pedestal portion. The internal device 3), a housing-side fixing member (for example, horizontal frames 7 and 8 described later) which is a part of the frame of the housing and is provided at a position higher than the pedestal portion, and a base end portion thereof (for example). , The base end portions 51b, 52b, 53b described later) are fixed to the upper portion of the internal device (for example, the upper portion 32 described later), and the tip portion (for example, the tip portions 51a, 52a, 53a described later) is on the rod-shaped device side. A cylinder provided with a fixing member (for example, rod members 51, 52, 53, 57 described later), the housing-side fixing member extending parallel to the extending direction of the tip portion and surrounding the outer peripheral surface of the tip portion. A portion (for example, a tubular member 72, 73, 74, 88 described later) is provided, and an elastic member (for example, a viscoelastic member 75, which will be described later) is provided between the outer peripheral surface of the tip portion and the inner peripheral surface of the tubular portion. 76, 77, a first viscoelastic member 571, a second viscoelastic member 84, a third viscoelastic member 86, 87, etc.) are provided.

(2) In this case, the housing includes a plurality of vertical frames extending in a substantially vertical direction (for example, vertical frames 21a, 21b, 21c, 21d described later) and the plurality of vertical frames extending in a substantially horizontal direction. A plurality of horizontal frames (for example, horizontal frames 7 and 8 described later) for connecting two adjacent frames are provided, and the housing-side fixing member is one of the plurality of horizontal frames. Is preferable.

(3) In this case, the internal device has a substantially rectangular shape in a top view, and the internal device includes a short side (for example, a short side portion 33 described later) and a housing-side fixing member in the upper top view. It is preferable that the housing is provided inside the housing so that the two are opposed to each other and substantially parallel to each other, and the tip portion extends in a direction substantially perpendicular to the short side.

(4) In this case, the tubular portion extends parallel to the extending direction of the tip portion and has an inner diameter larger than the outer diameter of the tip portion, the elastic member is tubular, and the outer peripheral surface thereof is the cylinder. It is preferable that the tip portion is welded to the inner peripheral surface of the portion and the tip portion is inserted into the inside of the elastic member.

(5) In this case, the housing-side fixing member includes a plate-shaped plate portion (for example, a housing plate portion 71 described later) extending perpendicularly to the extending direction of the tip portion, and the tubular portion is the cylinder portion. It is preferable that the plate portion is joined by welding while being inserted into a through hole formed in the plate portion (for example, a through hole 713 described later).

(6) In this case, a plurality of elastic members having different elastic moduli (for example, first viscoelastic member 571 and second viscoelastic member 571, which will be described later) are located between the outer peripheral surface of the tip portion and the inner peripheral surface of the tubular portion. It is preferable that the elastic member 84 and the third viscoelastic member 86, 87) are provided.

(7) In this case, a tubular device-side elastic member (for example, the first viscoelastic member 571 described later) is provided on the outer peripheral surface of the tip portion, and the device-side elastic member is provided on the inner peripheral surface of the tubular portion. A housing-side elastic member having an inner peripheral surface covering at least a part of the outer peripheral surface of the elastic member and having an elastic coefficient different from that of the device-side elastic member (for example, a second viscoelastic member 84 and a third viscoelastic member described later). Members 86, 87) are provided, and when the internal device is stationary, a gap (for example, a gap 89a, 89b described later) is provided between the inner peripheral surface of the housing-side elastic member and the outer peripheral surface of the device-side elastic member. ) Is preferably provided.

(8) In this case, the tubular portion supports a cover member (for example, a cover member 83 described later) that covers the vertically upper side of the tip portion, and a plate-shaped and elastic member on the device side that extends in the horizontal direction. A plate portion (for example, a housing plate portion 81 to be described later) is provided, and friction between the bottom portion and the plate portion is reduced between the bottom portion of the device-side elastic member and the plate portion. It is preferable that a friction reducing member (for example, a bearing 574 described later) is provided.

(1) According to the board of the present invention, a pedestal portion is provided at the bottom of the box-shaped housing, and the lower portion of the internal device to be protected is fixed to the pedestal portion. Further, on the upper part of the internal device, the base end portion of the device-side fixing member whose tip portion is rod-shaped is fixed, and a housing is provided which is a part of the frame of the housing and is provided at a position higher than the pedestal portion. It is a body-side fixing member. Further, the housing-side fixing member is provided with a cylinder portion that extends parallel to the extending direction of the tip portion of the device-side fixing member and covers the outer peripheral surface of the tip portion, and further, the outer peripheral surface of the tip portion and the inside of the cylinder portion. An elastic member is provided between the peripheral surface and the peripheral surface. Therefore, the upper part of the internal device is restricted from being displaced in all directions by a tubular elastic member. Therefore, when the vibration is transmitted to the internal device inside the housing, the vibration on the upper portion is efficiently suppressed by the tubular elastic member that covers the rod-shaped tip portion from the entire circumference. In particular, in the board of the present invention, a tubular portion is provided on the housing-side fixing member, and an elastic member is provided between the inner peripheral surface of the tubular portion and the outer peripheral surface of the tip portion, so that the elastic member is greatly deformed. Even if the above occurs, the tip portion will not be displaced more than the inner diameter of the tubular portion. Further, in the board of the present invention, a part of the frame of the housing is used as the fixing member on the housing side. Therefore, in the board of the present invention, the internal device is provided with a device-side fixing member, the housing-side fixing member is provided with a tubular portion covering the tip of the device-side fixing member, and the outer peripheral surface of the tip and the inner circumference of the tubular portion. Since it is only necessary to provide an elastic member between the surface and the surface, maintenance is easy, there is no possibility of obstructing the layout inside the housing, and the cost does not increase significantly. As described above, according to the board of the present invention, the vibration of the internal device can be sufficiently suppressed with a simple configuration.

(2) In the board of the present invention, one of a plurality of horizontal frames connecting two adjacent vertical frames constituting the housing is used as a housing-side fixing member. By diverting the horizontal frame provided in the housing of a general board as the housing-side fixing member in this way, the cost can be suppressed. Further, for example, when the entire housing vibrates due to an earthquake, the upper part of the internal equipment inside the housing is displaced along the horizontal direction. The vibration of the equipment can be suppressed efficiently.

(3) When the entire housing vibrates, the upper part of the internal equipment inside the housing is displaced more in the lateral direction than in the longitudinal direction. Therefore, in the board of the present invention, the internal device is provided inside the housing so that the short side thereof and the housing-side fixing member face each other and are substantially parallel to each other. Further, the tip of the device-side fixing member fixed to the upper part of the internal device extends in a direction substantially perpendicular to the short side thereof. As a result, the vibration of the internal device, which is largely displaced along the lateral direction, can be efficiently suppressed by the housing-side fixing member.

(4) In the board of the present invention, a tubular elastic member is welded to the inner peripheral surface of the tubular portion, and the tip of the device-side fixing member is inserted into the tubular elastic member. In this way, when the internal device is provided inside the housing, it is only necessary to insert the tip portion fixed to the upper portion into the inside of the tubular elastic member, so that the internal device can be vibrated while facilitating maintenance. It can be suppressed efficiently.

(5) According to the board of the present invention, the tubular portion covering the outer peripheral surface of the tip end portion of the device-side fixing member is inserted into the through hole formed in the plate portion of the housing-side fixing member, and is connected to the plate portion. It is joined by welding. According to the board of the present invention, the vibration of the internal device can be efficiently suppressed by a simple configuration.

(6) In the board of the present invention, by providing a plurality of elastic members having different elastic moduli between the outer peripheral surface of the tip portion and the inner peripheral surface of the tubular portion, it is possible to respond to the load of vibration and the magnitude of displacement. Since each elastic member can be deformed step by step, each elastic member can appropriately absorb the vibration energy and efficiently suppress the vibration of the internal device.

(7) According to the board of the present invention, a tubular device-side elastic member is provided on the outer peripheral surface of the tip portion, and a housing-side elastic member having an elastic modulus different from that of the device-side elastic member is provided on the inner peripheral surface of the tubular portion. .. Further, when the internal device is stationary, a gap is provided between the inner peripheral surface of the elastic member on the housing side and the outer peripheral surface of the elastic member on the device side. According to the board of the present invention, a weak vibration having a very small displacement can be suppressed by the above gap. Further, with respect to a vibration in which a load or displacement larger than this weak vibration is generated, the elastic member on the device side and the elastic member on the housing side can be gradually deformed according to the magnitude of the load or displacement. Each elastic member can appropriately absorb the vibration energy and efficiently suppress the vibration of the internal equipment.

(8) According to the board of the present invention, a friction reducing member for reducing friction between both members is provided between the bottom portion of the elastic member on the device side and the plate portion of the fixing member on the housing side supporting the bottom portion. Be done. When vibration is transmitted to the internal device, the internal device may generate a moment centered on the tip of the device-side fixing member. According to the board of the present invention, a tubular device-side elastic member is provided on the outer peripheral surface of the tip portion, and a friction reducing member is further provided between the device-side elastic member and the plate portion. As a result, the above-mentioned moment can be appropriately absorbed by the elastic member on the device side, and the vibration of the internal device can be efficiently suppressed.

It is a breaking perspective view which shows the structure of the inverter board which concerns on 1st Embodiment of this invention. It is a side view of a pedestal part. It is a side view of a pedestal part. It is sectional drawing along the longitudinal direction of a rod member, a tubular member, and a viscoelastic member. It is a breaking perspective view which shows the structure of the inverter board which concerns on 2nd Embodiment of this invention. It is a front view of the device side fixing member. It is sectional drawing along the line BB of FIG. It is a figure which shows the relationship between the magnitude of the displacement of the tip portion along the lateral side when the internal device vibrates, and the region where the 1st to 3rd viscoelastic members and the gap exert their functions.

<First Embodiment>
Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cutaway perspective view showing the configuration of the inverter board 1 according to the present embodiment. The inverter panel 1 is a type of control panel that supplies electric power to a dynamometer (not shown), and includes a box-shaped housing 2 and an internal device 3 provided inside the housing 2. In the following, a case where the present invention is applied to the inverter board 1 will be described, but the present invention is not limited to this. The present invention can be applied not only to the inverter board 1, but also to a control board, a distribution board, a power board, a distribution board, and the like.

The internal device 3 is composed of, for example, a plurality of transformers, and its overall shape is substantially cubic as shown in FIG. 1, and is substantially rectangular when viewed from above. Therefore, when the entire housing 2 vibrates due to an earthquake, movement, or the like, the upper portion 32 of the internal device 3 provided inside the housing 2 is displaced more along the lateral SD than the longitudinal LD in the top view. .. That is, the short side SD is also the vibration direction of the internal device 3 inside the housing 2.

The housing 2 extends along a plurality of columnar vertical frames 21a, 21b, 21c, 21d extending in the vertical direction and a direction perpendicular to the vertical frames 21a to 21d, that is, in the horizontal direction, and the plurality of vertical frames 21a, 21b, 21c, 21d. A plurality of horizontal frames 7 connecting two adjacent frames 21a to 21d, a plurality of plate-shaped sheet metals 25a, 25b, and 25c fixed to the vertical frames 21a to 21d form the bottom of the housing 2. It includes two rail members 26a and 26b and a pedestal portion 27 provided on the rail members 26a and 26b. Note that FIG. 1 shows only the horizontal frame 7 provided at a position higher than the pedestal portion 27 and extending along the short side SD among the plurality of horizontal frames. Further, for these vertical frames 21a to 21d and the horizontal frame 7, for example, a steel material is used.

The pedestal portion 27 has two pillar members 271,272 extending along the longitudinal LD and two fixing jigs 273,274 extending along the lateral SD and connecting the two pillar members 271,272. And a plurality of connecting bolts 275a, 275b, 275c for connecting both ends of the fixing jigs 273 and 274 along the short side SD and the pillar members 271,272, and the bottoms of the two pillar members 271,272. A plurality of roller members 279a, 279b, and 279c, which are rotatably provided in the above, are provided.

The lower portion 31 of the internal device 3 is fixed to the fixing jigs 273 and 274 of the pedestal portion 27 by fastening members (not shown) such as bolts and screws. Further, the pedestal portion 27 to which the internal device 3 is fixed is housed inside the housing 2 as shown in FIG. 1 by pushing the roller members 279a to 279c toward the sheet metal 25a side while rolling along the rail members 26a and 26b. Be done. After the pedestal portion 27 is housed inside the housing 2, the pedestal portion 27 is fixed to the rail members 26a and 26b by fastening members (not shown) such as bolts and screws in order to regulate the movement on the rail members 26a and 26b. As a result, the internal device 3 is provided inside the housing 2 so that the device-side fixing member 5 to be described later and the horizontal frame 7 provided on the short side 33 in the top view of the upper portion 32 face each other and are substantially parallel to each other. Be done.

FIG. 2A is a side view of the pedestal portion 27. More specifically, it is a view of the pedestal portion 27 viewed from the vertical frame 21c, 21d side along the longitudinal direction LD, and is a diagram showing a connection structure between the internal device 3 and the pedestal portion 27. As shown in FIG. 2A, the end portion 273a on the side of the pillar member 271 along the short side SD of the fixing jig 273 is inserted with two plate-shaped anti-vibration rubbers 276a and 277a to insert the connecting bolt 275a. By fastening, it is fixed to the pillar member 271. The anti-vibration rubber 276a is inserted between the connecting bolt 275a and the end portion 273a, and the anti-vibration rubber 277a is inserted between the end portion 273a and the column member 271. Further, the end portion 273c on the side of the pillar member 272 along the short side SD of the fixing jig 273 is inserted into the two plate-shaped anti-vibration rubbers 276c and 277c, and the connecting bolt 275c is fastened to fasten the pillar. It is fixed to the member 272. The anti-vibration rubber 276c is inserted between the connecting bolt 275c and the end portion 273c, and the anti-vibration rubber 277c is inserted between the end portion 273c and the column member 272.

Note that FIG. 2A has described a case where the fixing jig 273 and the pillar member 271 are fixed by inserting two anti-vibration rubbers, but the present invention is not limited to this. For example, as shown in FIG. 2B, the fixing jig 273 and the pillar member 271 may be fixed by inserting one anti-vibration rubber. In this case, the anti-vibration rubber 277a is preferably inserted between the end portion 273a and the pillar member 271. Further, the anti-vibration rubber 277c is preferably inserted between the end portion 273c and the pillar member 272.

Returning to FIG. 1, of the upper portion 32 of the internal device 3, the short side portion 33 in the top view is provided with the device-side fixing member 5. The device-side fixing member 5 has a plurality of rod-shaped rod members 51, 52, 53 (three in the example of FIG. 1) and a plate-shaped member 5 to fix these rod members 51 to 53 to the upper portion 32 of the internal device 3. It includes a mounting stay 55. The rod members 51 to 53 extend from the short side portion 33 toward the lateral frame 7 side along the longitudinal direction LD. These rod members 51 to 53 are fixed to the short side portions 33 at substantially equal intervals along the short side SD. The tip portions 51a, 52a, 53a of these rod members 51, 52, 53 are covered in the tubular members 72, 73, 74 described later. Further, the base end portions 51b, 52b, 53b of the rod members 51, 52, 53 are fixed to the short side portion 33 by the mounting stay 55. For the rod members 51 to 53, for example, a steel material is used.

The horizontal frame 7 has a plate shape extending along the horizontal direction, and connects two adjacent vertical frames 21a and 21b. The horizontal frame 7 is provided on a plate-shaped housing plate portion 71 extending perpendicularly to the extending direction of the tip portions 51a to 53a of the three rod members 51 to 53, and rods provided on the housing plate portion 71. Cylindrical tubular members 72, 73, 74 surrounding the tip portions 51a to 53a of the members 51 to 53, and the outer peripheral surfaces of the rod members 51 to 53 and the inner peripheral surfaces of the tubular members 72 to 74 are provided. It includes viscoelastic members 75, 76, 77. For example, a steel material is used for the housing plate portion 71 and the tubular members 72 to 74.

FIG. 3 is a cross-sectional view of the rod member 51, the tubular member 72, and the viscoelastic member 75 along the longitudinal LD. Since the other rod members 52, 53, the tubular members 73, 74, and the viscoelastic members 76, 77 have substantially the same configurations as the rod member 51, the tubular member 72, and the viscoelastic member 75, the cross-sectional view is shown. And detailed description will be omitted.

The tubular member 72 has a cylindrical shape extending parallel to the extending direction (that is, the longitudinal direction LD) of the tip portion 51a of the rod member 51. Further, the tubular member 72 has an inner diameter larger than the outer diameter of the tip portion 51a of the rod member 51. Further, as shown in FIG. 3, the tubular member 72 surrounds the outer peripheral surface of the tip portion 51a of the rod member 51 fixed to the internal device 3.

Further, as shown in FIG. 3, the total length of the tubular member 72 along the longitudinal LD is larger than the thickness of the housing plate portion 71. Such a tubular member 72 is inserted into a through hole 713 formed in advance in the housing plate portion 71, and the edge of the through hole 713 and the outer peripheral surface of the tubular member 72 are joined by welding to form a housing. It is fixed to the plate portion 71.

The viscoelastic member 75 has a tubular shape extending parallel to the tubular member 72 and has an outer diameter substantially equal to the inner diameter of the tubular member 72. The viscoelastic member 75 is made of a viscous and elastic material (eg, rubber). The viscoelastic member 75 is provided inside the tubular member 72. More specifically, the viscoelastic member 75 is fixed to the inside of the tubular member 72 by welding the outer peripheral surface thereof to the inner peripheral surface of the tubular member 72. The inner diameter of the viscoelastic member 75 is substantially equal to the outer diameter of the tip portion 51a of the rod member 51. Further, when the internal device 3 is installed inside the housing 2, the tip portion 51a of the rod member 51 is inserted into the viscoelastic member 75.

According to the inverter board 1 of the present embodiment, the following effects are obtained.
(1) According to the inverter board 1, a pedestal portion 27 is provided at the bottom of the housing 2, and the lower portion 31 of the internal device 3 to be protected is fixed to the pedestal portion 27. Further, the base end portions 51b to 53b of the rod members 51 to 53 whose tip portions 51a to 53a are rod-shaped are fixed to the upper portion 32 of the internal device 3. Further, the horizontal frame 7 which is a part of the frame of the housing 2 and is provided at a position higher than the pedestal portion 27 extends in parallel with the extending direction of the tip portions 51a to 53a of the rod members 51 to 53. Cylindrical members 72 to 74 covering the outer peripheral surfaces of the tip portions 51a to 53a are provided, and viscoelastic members 75 to 77 are further provided between the outer peripheral surfaces of the tip portions 51a to 53a and the inner peripheral surfaces of the tubular members 72 to 74. Is provided. Therefore, the upper portion 32 of the internal device 3 is restricted from being displaced in all directions by the tubular viscoelastic members 75 to 77. Therefore, when vibration is transmitted to the internal device 3 inside the housing 2, the vibration of the upper portion 32 is efficiently suppressed by the tubular viscoelastic members 75 to 77 that cover the rod-shaped tip portions 51a to 53a from the entire circumference. NS. In particular, in the inverter board 1, tubular members 72 to 74 are provided on the horizontal frame 7, and viscoelastic members 75 to 77 are provided between the inner peripheral surfaces of the tubular members 72 to 74 and the outer peripheral surfaces of the tip portions 51a to 53a, respectively. As a result, even when vibrations that cause the viscoelastic members 75 to 77 to be significantly deformed occur, the tip portions 51a to 53a are not displaced more than the inner diameters of the tubular members 72 to 74. Further, the inverter board 1 uses a horizontal frame 7, which is one of a plurality of frames constituting the housing 2. Therefore, in the inverter board 1, the internal devices 3 are provided with rod members 51 to 53, the horizontal frame 7 is provided with tubular members 72 to 74 covering the tip portions 51a to 53a of the rod members 51 to 53, and these tip portions 51a to 51a are further provided. Since it is only necessary to provide an elastic member between the outer peripheral surface of 53a and the inner peripheral surface of the tubular members 72 to 74, maintenance is easy, there is no risk of hindering the layout inside the housing 2, and the cost is high. Does not increase significantly. As described above, according to the inverter board 1, the vibration of the internal device can be sufficiently suppressed with a simple configuration.

(2) In the inverter board 1, the bar member is diverted from the horizontal frame 7, which is one of the plurality of frames connecting two adjacent vertical frames 21a to 21d constituting the housing 2. The vibrations of 51 to 53 are suppressed. By diverting the horizontal frame 7 provided in the housing 2 of the general inverter board 1 in this way, the cost can be suppressed. Further, for example, when the entire housing 2 vibrates due to an earthquake, the upper portion 32 of the internal device 3 inside the housing 2 is displaced along the horizontal direction. The vibration of the device 3 can be suppressed efficiently.

(3) When the entire housing 2 vibrates, the upper portion 32 of the internal device 3 inside the housing 2 is displaced more along the lateral SD than the longitudinal LD. Therefore, in the inverter board 1, the internal device 3 is installed inside the housing 2 so that the short side portion 33 and the horizontal frame 7 face each other and are substantially parallel to each other. Further, the tip portions 51a to 53a of the rod members 51 to 53 fixed to the upper portion 32 of the internal device 3 extend in a direction substantially perpendicular to the short side portion 33 of the internal device 3. As a result, the vibration of the internal device 3 that is largely displaced along the SD in the lateral direction can be efficiently suppressed by the horizontal frame 7.

(4) In the inverter board 1, tubular viscoelastic members 75 to 77 are welded to the inner peripheral surfaces of the tubular members 72 to 74, and the tip portions 51a to 53a of the rod members 51 to 53 are further welded to the tubular viscoelastic members 75. Insert into the inside of ~ 77. In this way, when the internal device 3 is provided inside the housing 2, it is only necessary to insert the tip portions 51a to 53a fixed to the upper portion 32 into the tubular viscoelastic members 75 to 77. Vibration of the internal device 3 can be efficiently suppressed while facilitating maintenance.

(5) According to the inverter board 1, the tubular members 72 to 74 covering the outer peripheral surfaces of the tip portions 51a to 53a of the rod members 51 to 53 are formed in the through holes 713 formed in the housing plate portion 71 of the horizontal frame 7. In the inserted state, it is joined to the housing plate portion 71 by welding. According to the inverter board 1, the vibration of the internal device 3 can be efficiently suppressed by a simple configuration.

In the above embodiment, the case where the three rod members 51 to 53 are provided on the upper portion 32 of the internal device 3 has been described, but the present invention is not limited to this. The number of rod members may be less than or greater than three. The number of rod members may be at least one.

<Second Embodiment>
Next, the second embodiment of the present invention will be described with reference to the drawings.
FIG. 4 is a cutaway perspective view showing the configuration of the inverter board 1A according to the present embodiment. In the following description of the inverter board 1A, the same reference numerals are given to the same configurations as those of the inverter board 1 according to the first embodiment, and detailed description thereof will be omitted. The inverter board 1A of the present embodiment is different from the inverter board 1 of the first embodiment mainly in the configuration of the device-side fixing member 5A and the horizontal frame 8.

Of the upper portion 32 of the internal device 3, the short side portion 33 in the top view is provided with the device side fixing member 5A. The device-side fixing member 5A includes a single rod-shaped rod member 57 and a plate-shaped mounting stay 58 that fixes the rod-shaped member 57 to the upper portion 32 of the internal device 3. The rod member 57 extends from the short side portion 33 toward the horizontal frame 8 side along the longitudinal direction LD. The base end portion 57b of the rod member 57 is fixed to the short side portion 33 by the mounting stay 58. For the rod member 57, for example, a steel material is used.

FIG. 5 is a front view of the device-side fixing member 5A. More specifically, FIG. 5 is a view of the tip end portion 57a of the rod member 57 of the device side fixing member 5A viewed from the base end portion 57b side along the longitudinal LD. FIG. 6 is a cross-sectional view taken along the line BB of FIG.

A cylindrical first viscoelastic member 571 extending along the extending direction of the tip portion 57a is provided on the outer peripheral surface of the tip portion 57a of the rod member 57. The first viscoelastic member 571 is made of a viscous and elastic material (eg, rubber). Further, the bottom portion 572 of the first viscoelastic member 571 is provided with a plurality of bearings 574 that reduce friction between the first viscoelastic member 571 and the housing plate portion 81 described later.

The horizontal frame 8 has a plate shape extending along the horizontal direction, and connects two adjacent vertical frames 21a and 21b. The horizontal frame 8 is provided on a plate-shaped housing plate portion 81 that extends parallel to the extending direction of the tip portion 57a of the rod member 57 and covers the vertically lower side of the tip portion 57a, and the housing plate portion 81. A second viscoelastic member 84 provided between a cover member 83 that covers the vertically upper side of the tip portion 57a of the rod member 57, and an inner peripheral surface of the cover member 83 and an outer peripheral surface of the tip portion 57a of the rod member 57. And the third viscoelastic members 86, 87.

The cover member 83 has an arch shape that covers the upper side of the tip portion 57a of the rod member 57 in the vertical direction, and has a plate-shaped cover left side portion 831 extending along the vertical direction on the left side of the tip portion 57a in FIG. 5 and a tip portion. A plate-shaped cover right side portion 832 extending in the vertical direction on the right side in FIG. 5 of 57a and a plate-shaped cover upper portion 833 extending in the horizontal direction on the upper side in FIG. 5 of the tip portion 57a are combined. Will be done.

As shown in FIG. 5, the cover member 83 is fixed to the housing plate portion 81 by a fastening member (not shown) in a state where the front end portion 57a is covered by the cover left side portion 831, the cover right side portion 832, and the cover upper portion 833. .. Therefore, by combining these cover members 83 and the housing plate portion 81, a tubular member 88 that surrounds the outer peripheral surface of the tip portion 57a of the rod member 57 over the entire circumference is formed.

The second viscoelastic member 84 has an arch shape that covers the upper end portion 57a of the rod member 57 in the vertical direction. The second viscoelastic member 84 is made of a viscous and elastic material (for example, rubber). The elastic modulus of the second viscoelastic member 84 is lower than the elastic modulus of the first viscoelastic member 571 described above. That is, the second viscoelastic member 84 is softer than the first viscoelastic member 571. The second viscoelastic member 84 is welded to the inner peripheral surface of the cover member 83.

The two third viscoelastic members 86 and 87 are plate-shaped, respectively. These third viscoelastic members 86 and 87 are made of a viscous and elastic material (for example, rubber). The elastic modulus of these third viscoelastic members 86 and 87 is lower than the elastic modulus of the second viscoelastic member 84 described above. That is, the third viscoelastic members 86 and 87 are softer than the second viscoelastic member 84. These third viscoelastic members 86 and 87 are the inner peripheral surface of the second viscoelastic member 84, more specifically, the left inner peripheral surface 841 on the left side in FIG. 5 and the right side in FIG. 5 of the second viscoelastic member 84. It is welded to the right inner peripheral surface 842, respectively. Further, as shown in FIG. 5, when the internal device 3 is stationary inside the housing 2, it is between the outer peripheral surface of the first viscoelastic member 571 and the surfaces of the third viscoelastic members 86 and 87. Is provided with gaps 89a and 89b.

According to the inverter board 1A of the present embodiment, the following effects are obtained.
(6) In the inverter board 1A, the first viscoelastic member 571, the second viscoelastic member 84, and the third viscoelastic member have different elastic ratios between the outer peripheral surface of the tip portion 57a and the inner peripheral surface of the tubular member 88, respectively. By providing the elastic members 86 and 87, each viscoelastic member can be deformed stepwise according to the load of vibration and the magnitude of displacement, so that each viscoelastic member appropriately absorbs the energy of shaking. Vibration of internal equipment can be suppressed efficiently.

(7) According to the inverter board 1A, a tubular first viscoelastic member 571 is provided on the outer peripheral surface of the tip portion 57a, and the inner peripheral surface of the tubular member 88 has an elastic modulus different from that of the first viscoelastic member 571. Two viscoelastic members 84 and third viscoelastic members 86, 87 are provided. Further, when the internal device 3 is stationary, gaps 89a and 89b are provided between the inner peripheral surfaces of the third viscoelastic members 86 and 87 and the outer peripheral surface 573 of the first viscoelastic member 571.

FIG. 7 shows the magnitude of displacement of the tip portion 57a of the rod member 57 along the lateral SD when the internal device 3 vibrates, and the first viscoelastic member 571, the second viscoelastic member 84, and the third viscoelastic member. It is a figure which shows the relationship with the region where the members 86, 87, and the gap 89a, 89b exert a function.

As shown in FIG. 7, for example, when a weak shaking occurs, the tip portion 57a is displaced only between the gaps 89a and 89b, so that the first viscoelastic member 571 provided in the tip portion 57a is the first. 3 Since they do not come into contact with the viscoelastic members 86 and 87, none of the viscoelastic members 571, 84, 86 and 87 function.

As described above, the third viscoelastic members 86 and 87 have the lowest elastic modulus and are soft among the three types of viscoelastic members. Therefore, when the first viscoelastic member 571 is shaken to the extent that it comes into contact with the third viscoelastic members 86,87, the third viscoelastic member 86,87, which has the lowest elastic coefficient among the three types of viscoelastic members, is generated. Is elastically deformed, so that the vibration of the rod member 57 and the internal device 3 to which the rod member 57 is fixed is suppressed.

The second viscoelastic member 84 has the second lowest elastic modulus among the three types of viscoelastic members. Therefore, when strong shaking occurs, the third viscoelastic members 86 and 87 and the second viscoelastic member 84 are elastically deformed, so that the vibration of the internal device 3 is suppressed.

The first viscoelastic member 571 has the highest elastic modulus among the three types of viscoelastic members. Therefore, when a very strong vibration occurs, the third viscoelastic member 86, 87, the second viscoelastic member 84, and the first viscoelastic member 571 are elastically deformed, so that the vibration of the internal device 3 is suppressed. NS.

As described above, according to the inverter board 1A, three types of viscoelastic members can be made to function step by step according to the magnitude of load and displacement, so that the energy of vibration is appropriately absorbed by the various viscoelastic members. However, the vibration of the internal device 3 can be efficiently suppressed.

(8) According to the inverter board 1A, a bearing 574 that reduces friction between the two members is provided between the bottom portion 572 of the first viscoelastic member 571 and the housing plate portion 81 that supports the bottom portion 572. Be done. When the vibration is transmitted to the internal device 3, the internal device 3 may generate a moment centered on the tip portion 57a of the rod member 57. According to the inverter board 1A, a tubular first viscoelastic member 571 is provided on the outer peripheral surface of the tip portion 57a, and a bearing 574 is further provided between the first viscoelastic member 571 and the housing plate portion 81. As a result, the above moment can be appropriately absorbed by the first viscoelastic member 571, and the vibration of the internal device 3 can be efficiently suppressed.

1,1A ... Inverter board (board)
2 ... Housing (housing)
21a, 21b, 21c, 21d ... Vertical frame 7,8 ... Horizontal frame 71,81 ... Housing plate part (plate part)
713 ... Through holes 72, 73, 74, 88 ... Cylinder member (cylinder part)
75, 76, 77 ... Viscoelastic member (elastic member)
26a, 26b ... Rail member (bottom)
27 ... Pedestal 3 ... Internal equipment 31 ... Lower 32 ... Upper 33 ... Short side (short side)
5,5A ... Equipment side fixing member 51, 52, 53, 57 ... Rod member (equipment side fixing member)
51a, 52a, 53a, 57a ... Tip portion 51b, 52b, 53b, 57b ... Base end portion 571 ... First viscoelastic member (elastic member, device-side elastic member)
574 ... Bearing (friction reduction member)
83 ... Cover member 84 ... Second viscoelastic member (elastic member, housing-side elastic member)
86, 87 ... Third viscoelastic member (elastic member, housing-side elastic member)

Claims (8)

With a box-shaped housing
A pedestal provided at the bottom of the housing and
A board including an internal device provided inside the housing and having a lower portion fixed to the pedestal portion.
A housing-side fixing member that is a part of the frame of the housing and is provided at a position higher than the pedestal portion.
Its base end is fixed to the upper part of the internal device, and its tip is provided with a rod-shaped device-side fixing member.
The housing-side fixing member includes a tubular portion that extends parallel to the extending direction of the tip portion and surrounds the outer peripheral surface of the tip portion.
A plate characterized in that an elastic member is provided between the outer peripheral surface of the tip portion and the inner peripheral surface of the tubular portion. The housing includes a plurality of vertical frames extending along a substantially vertical direction and a plurality of horizontal frames extending along a substantially horizontal direction and connecting two adjacent vertical frames.
The board according to claim 1, wherein the housing-side fixing member is one of the plurality of horizontal frames. The internal device has a substantially rectangular shape when viewed from above, and has a substantially rectangular shape.
The internal device is provided inside the housing so that the short side of the upper portion in a top view and the housing-side fixing member face each other and are substantially parallel to each other.
The board according to claim 2, wherein the tip portion extends in a direction substantially perpendicular to the short side. The tubular portion extends parallel to the extending direction of the tip portion and has an inner diameter larger than the outer diameter of the tip portion.
The elastic member is tubular, and its outer peripheral surface is welded to the inner peripheral surface of the tubular portion.
The board according to any one of claims 1 to 3, wherein the tip portion is inserted into the inside of the elastic member. The housing-side fixing member includes a plate-shaped plate portion extending perpendicular to the extending direction of the tip portion.
The board according to claim 4, wherein the tubular portion is joined to the plate portion by welding while being inserted into a through hole formed in the plate portion. The board according to any one of claims 1 to 3, wherein a plurality of elastic members having different elastic moduli are provided between the outer peripheral surface of the tip portion and the inner peripheral surface of the tubular portion. A cylindrical device-side elastic member is provided on the outer peripheral surface of the tip portion.
On the inner peripheral surface of the tubular portion, a housing-side elastic member having an inner peripheral surface covering at least a part of the outer peripheral surface of the device-side elastic member and having an elastic modulus different from that of the device-side elastic member is provided.
The board according to claim 6, wherein when the internal device is stationary, a gap is provided between the inner peripheral surface of the housing-side elastic member and the outer peripheral surface of the device-side elastic member. The tubular portion is provided with a cover member for covering the vertically upper side of the distal end portion, and a plate portion for supporting the plate-like and is and the device-side elastic member extending in the horizontal direction, and
The board according to claim 7, wherein a friction reducing member for reducing friction between the bottom portion and the plate portion is provided between the bottom portion of the elastic member on the device side and the plate portion.

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