JP2014066272A - Vibration isolation frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a vibration generation apparatus from being broken owing to a horizontal shock by improving impact buffering properties for buffering against the horizontal shock when a rod-like member abuts against an inner periphery of an insertion hole.SOLUTION: An upper frame 2 is provided with an upper horizontal plate part 22 which extends in a horizontal direction. A lower frame 3 is provided with a lower horizontal plate part 33 which extends in the horizontal direction opposite the upper horizontal plate part 22 in a vertical direction. A swing stop device 5 has a hexagonal bolt 50 which has its lower end side fixed to the lower horizontal plate part 33 while having an upper end side inserted into the insertion hole 23a provided in the upper horizontal plate part 22, and a swing stop buffer rubber 55 which is provided for the hexagonal bolt 50 to suppress a vertical swing of the upper frame 2. In the insertion hole 23a, cylindrical aluminum metal fittings 26 are fitted, the fittings having an axial length larger than the thickness of the upper horizontal plate part 23.

Description

  The present invention provides an upper frame on which a vibration generating device is placed, a lower frame provided on the lower side of the upper frame, a vibration isolating member provided between the both frames, and a space between the two frames. The present invention relates to an anti-vibration gantry provided with an anti-sway device provided.

  The vibration generated from the vibration generator mounted on the upper base and transmitted to the upper base is insulated and absorbed by the anti-vibration member provided between the upper base and the lower base, and it is not transmitted to the lower base. An anti-vibration stand is known as the prior art.

  Hereinafter, Patent Document 1 will explain a conventional vibration isolation frame. The vibration isolator provided between the upper base and the lower base is composed of an upper side anti-vibration rubber, a lower side anti-vibration rubber, and a partition plate interposed therebetween. Upper and lower restricting plates constituting gantry interval limiting means are attached to the upper gantry and the lower gantry. Bolts are fixed to the lower regulating plate. The bolt extends upward through a through hole formed in the upper regulating plate. The bolt is provided with a stopper plate and an overload prevention plate. The stopper plate comes into contact with the restriction plate when the lower base is in a free state, and is separated from the restriction plate when a load is applied to the vibration isolation unit. The bolt is fitted with a protective sleeve so as to be sandwiched between the stopper plate and the overload prevention plate.

JP 2012-26542 A

  By the way, in the conventional vibration isolator, when the vibration generating device vibrates greatly due to an earthquake or the like, the bolt is brought into contact with the inner periphery of the through hole, thereby suppressing the upper base from shaking in the horizontal direction.

  However, the conventional anti-vibration mount frame lacks shock-absorbing properties to buffer the horizontal shock when the bolt comes into contact with the inner periphery of the through hole, and the vibration generating device is damaged by the shock (for example, its internal structure) There is a problem that there is a risk of damage.

  The present invention has been made in view of such a point, and the object of the present invention is to improve the shock buffering property for buffering the shock in the horizontal direction when the rod-shaped member comes into contact with the inner periphery of the insertion hole. It is to prevent the vibration generating device from being damaged by the impact.

  In order to solve the above problems, the present invention is characterized in that a cylindrical member made of an inelastic material is fitted into the insertion hole.

  Specifically, the present invention provides an upper base on which a vibration generating device is placed, a lower base provided below the upper base, a vibration isolating member provided between the two bases, The following solution was taken for the purpose of providing an anti-sway device provided between the two stands.

  That is, in the first invention, the upper frame is provided with an upper horizontal plate portion that extends in the horizontal direction, and the lower frame has a lower horizontal plate portion that extends in the horizontal direction and the upper horizontal plate portion. The anti-sway device is provided so that one end of the anti-sway device is inserted into an insertion hole provided in one of the two horizontal plate portions, and the other end side of the two horizontal plate portions. A rod-like member fixed on the other side, and a stopper provided on the rod-like member for suppressing vertical shaking of the upper base, and the insertion hole has an axial length of the one side A cylindrical member that is longer than the thickness of the horizontal plate portion and made of an inelastic material is fitted therein.

  Here, the inelastic body includes metal, resin, and the like. Further, the cylindrical member includes not only a cylindrical member but also a rectangular tube member.

  According to the first invention, in the insertion hole, the tubular member having an axial length longer than the thickness of the one horizontal plate part and made of an inelastic body is internally fitted. When the rod-shaped member comes into contact with the inner periphery of the insertion hole via the cylindrical member, the contact area increases, and the horizontal impact when the rod-shaped member contacts the inner periphery of the insertion hole is effectively buffered. Is done. For this reason, the shock-absorbing property for buffering the shock in the horizontal direction when the rod-shaped member comes into contact with the inner periphery of the insertion hole is improved, and the vibration generating device is damaged by the shock (for example, the internal structure is damaged). ) Is suppressed.

  According to a second aspect, in the first aspect, the stopper is provided on both outer sides in the axial direction of the cylindrical member, and flange portions are provided at both ends in the axial direction of the cylindrical member. Are formed so as to face each other in the vertical direction.

  According to this, since the stopper is provided on each axially outer side of the cylindrical member, and the flange portion is formed on both ends of the cylindrical member so as to face the stopper in the vertical direction, the vibration generating device is When a large vibration is caused by an earthquake or the like, the stopper is brought into contact with the flange portion, so that the upper base is prevented from shaking in the vertical direction. As described above, the use of the tubular member suppresses the upper base from shaking in the vertical direction.

  According to a third invention, in the first or second invention, the rod-like member is elastically fixed to the other horizontal plate portion at the other end side.

  According to this, since the rod-like member is elastically fixed to the other horizontal plate portion with the other end side elastically fixed to the other horizontal plate portion with one end side thereof being inserted into the insertion hole provided in one of the two horizontal plate portions. When the rod-shaped member abuts on the inner periphery of the insertion hole via the cylindrical member by shaking in the horizontal direction, the rod-shaped member is inclined in the horizontal direction, and this inclination causes the rod-shaped member to contact the inner periphery of the insertion hole. The shock buffering stroke and shock buffering time for buffering the shock in the horizontal direction become longer, and the shock is buffered more effectively. For this reason, the shock absorbing property for buffering the shock in the horizontal direction when the rod-shaped member comes into contact with the inner periphery of the insertion hole is further improved, and the vibration generating device is damaged by the shock (for example, the internal structure is (Breakage) is further suppressed.

  According to the present invention, since the tubular member having an axial length longer than the thickness of the one horizontal plate portion and made of an inelastic body is fitted into the insertion hole, the upper base sways in the horizontal direction, and the rod-shaped member When the abuts against the inner periphery of the insertion hole through the cylindrical member, the contact area increases, and the horizontal impact when the rod-shaped member abuts on the inner periphery of the insertion hole is effectively buffered, For this reason, the impact buffering property for buffering the impact in the horizontal direction when the rod-shaped member comes into contact with the inner periphery of the insertion hole is improved, and the vibration generating device is prevented from being damaged by the impact.

It is a front view which shows the vibration isolator stand which concerns on embodiment of this invention. It is a top view which shows a vibration isolator stand. It is sectional drawing which shows a rocking | fluctuation prevention apparatus. (A) is sectional drawing which shows the upper part of an aluminum metal fitting, (b) is a half sectional view which shows the lower part of an aluminum metal fitting.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its application, or its use.

  1 is a front view showing an anti-vibration mount 1 according to an embodiment of the present invention, FIG. 2 is a plan view showing the anti-vibration mount 1, FIG. 3 is a cross-sectional view showing an anti-sway device 5, and FIG. ) Is a cross-sectional view showing the upper part of the aluminum metal fitting, and FIG. 4B is a one-side cross-sectional view showing the lower part of the aluminum metal fitting.

  As shown in FIGS. 1 to 3, the anti-vibration stand 1 is a rectangle on which equipment that generates vibrations (hereinafter referred to as vibration generating equipment) such as an outdoor unit (not shown) of an air conditioner is placed. A frame-shaped upper base 2, and a rectangular frame-shaped lower base 3 that is provided on the lower side of the upper base 2 so as to face the upper base 2 and is installed on an installation surface that extends horizontally, such as a floor surface, An isolator 4 (anti-vibration member) provided between the two racks 2 and 3 and an anti-sway device 5 provided between the two racks 2 and 3 are provided. 1 to 3 show a state in which a vibration generating device is placed on the upper base 2.

  The upper frame 2 has four square steel pipes having a substantially rectangular cross section. These square steel pipes are a pair of long-side square steel pipes 20 and 20 on the long side of the gantry 2 provided so as to face each other, and a pair on the short side provided so as to face each other. Short side square steel pipes 21 and 21.

  The long side and short side square steel pipes 20, 21 adjacent to each other are connected and connected by a metal upper seismic bracket 22. Each upper seismic bracket 22 includes a substantially square upper horizontal plate portion 23 (one of both horizontal plate portions (one horizontal plate portion)) extending in the horizontal direction, and a long side square steel pipe 20 of the upper horizontal plate portion 23. A rectangular long-side vertical plate 24 provided to extend upward at the end on the side, and an end on the short-side square steel pipe 21 side of the upper horizontal plate 23 so as to extend upward. It is comprised with the rectangular-shaped short side vertical board part 25. FIG. The long side vertical plate part 24 has the end of the long side square steel pipe 20 joined to the surface on the long side square steel pipe 20 side. The short side vertical plate portion 25 has an end on the long side square steel pipe 20 side connected to the long side vertical plate portion 24, and the short side square steel tube 21 side surface has a short side square steel pipe 21 side surface. The ends are joined. The upper horizontal plate portion 23 connects the lower end portions of the long-side and short-side vertical plate portions 24 and 25 to each other. A circular insertion hole 23 a penetrating in the thickness direction is formed in the central portion of the upper horizontal plate portion 23.

  As shown in FIGS. 3 and 4, a cylindrical aluminum die-cast aluminum fitting 26 (cylindrical member) whose axial length is longer than the thickness of the upper horizontal plate portion 23 is fitted in the insertion hole 23a. Has been. The aluminum fitting 26 is composed of an annular upper portion 27 and a lower portion 28. Here, the upper portion 27 corresponds to a flange portion formed so as to extend radially outward at the upper end portion of the lower portion 28 when the aluminum fitting 26 is viewed as a whole. On the inner peripheral surface of the upper portion 27, a convex portion 27a is formed over the entire circumference. The lower portion 28 has a cylindrical main body portion 28a and an annular flange portion 28b formed at the lower end portion of the main body portion 28a so as to extend radially outward. A concave portion 28c is formed on the outer peripheral surface of the main body portion 28a so as to face the convex portion 27a. The flange portion 28 b is thinner than the upper portion 27. Then, in a state where the main body portion 28a of the lower portion 28 is inserted into the insertion hole 23a, the convex portion 27a of the upper portion 27 is fitted into the concave portion 28c of the lower portion 28. The upper horizontal plate portion 23 is sandwiched from both sides in the vertical direction via an annular rubber sheet 29 by the flange portion 28b of the side portion 28. Thereby, the aluminum metal fitting 26 is inserted and fixed in the insertion hole 23a. The main body 28a is also formed with a plurality of slits 28d extending in the axial direction at predetermined intervals. The slit 28d makes it easy for the main body portion 28a to bend and facilitates fitting to the lower portion 28 of the upper portion 27. In FIG. 3, the aluminum fitting 26 is shown in a simplified manner.

  As shown in FIGS. 1 to 3, the undercarriage 3 has four square steel pipes having a substantially rectangular cross section. These square steel pipes are a pair of long side square steel pipes 30, 30 on the long side of the undercarriage 3 provided so as to face each other, and a pair on the short side provided so as to face each other. Short side square steel pipes 31 and 31.

  The long-side and short-side square steel pipes 30 and 31 that are adjacent to each other are connected and connected by a metal lower seismic bracket 32. Each lower seismic bracket 32 includes a substantially square lower horizontal plate portion 33 (the other of the horizontal plate portions (the other horizontal plate portion)) extending in the horizontal direction and the long side of the lower horizontal plate portion 33. A rectangular long-side vertical plate 34 provided so as to extend downward at the end on the square steel pipe 30 side, and an end on the short-side square steel pipe 31 side of the lower horizontal plate 33 on the lower side. It is comprised by the rectangular-shaped short side vertical board part 35 provided so that it might extend. In the long side vertical plate portion 34, the end of the long side square steel pipe 30 is joined to the surface on the long side square steel pipe 30 side. The short side vertical plate portion 35 has an end on the long side square steel pipe 30 side connected to the long side vertical plate portion 34, and a surface of the short side square steel tube 31 on the surface on the short side square steel tube 31 side. The ends are joined. The lower horizontal plate portion 33 is provided so as to face the upper horizontal plate portion 23 in the vertical direction, and connects the upper end portions of the long side and short side vertical plate portions 34 and 35 to each other. A circular fixing hole 33a penetrating in the thickness direction is formed at the center of the lower horizontal plate portion 33. The fixing hole 33a is provided so as to face the insertion hole 23a in the vertical direction.

  The isolator 4 is for insulating and absorbing the vibration generated from the vibration generating device and transmitted to the upper frame 2 so as not to transmit it to the lower frame 3. Two are provided between the side square steel pipes 20 and 30 so as to extend in the vertical direction. Here, detailed description of the configuration of the isolator 4 is omitted, but as the isolator 4, for example, a conventionally known one is used.

  The anti-sway device 5 is for stopping the upper base 2 from shaking in the vertical direction and the horizontal direction due to the vibration of the vibration generating device, and between the upper and lower seismic brackets 22 and 32 of the upper and lower pairs. Are provided so as to extend in the vertical direction. The anti-sway device 5 has its upper end side (one end side) inserted into the insertion hole 23a of the upper horizontal plate part 23 in addition to the insertion hole 23a and the fixing hole 33a, and its lower end side (the other end side). Are respectively provided on both outer sides in the axial direction of the aluminum fitting 26 in the metal hexagon bolt 50 (bar-shaped member) elastically fixed to the lower horizontal plate portion 33, and in the vertical direction of the upper platform 2. An anti-sway cushioning rubber 55 (stopper) for suppressing the oscillation is provided.

  The hexagon bolt 50 is arranged so as to extend in the vertical direction and its head 50a is located on the lower side. A cylindrical metal upper inner insertion tube 51 is fitted on the upper end side of the hexagon bolt 50. A cylindrical rubber bush 52 is externally fitted to the axially central portion of the upper internal insertion tube 51. The rubber bush 52 is provided so as to face the main body portion 28a of the lower part 28 of the aluminum metal fitting in the horizontal direction (radial direction), and a gap is formed between the rubber bush 52 and the main body portion 28a. The rubber bush 52 has an axial length shorter than that of the upper internal insertion tube 51. The upper inner insertion tube 51 has both axial end portions protruding outward in the axial direction from the rubber bush 52. On the outer periphery of the rubber bush 52, a plurality of grooves (not shown) extending in the axial direction are formed at predetermined intervals.

  Further, a metal round washer 53 and a metal anti-shock buffer washer 54 are provided on the upper end side of the hexagon bolt 50 so that the round washer 53 is positioned above the anti-sway buffer washer 54. The anti-sway buffer washer 54 has a dodecagonal shape with an internal thread and is screwed into the hexagon bolt 50.

  Further, a pair of upper and lower circular anti-sway cushioning rubbers 55 are provided on the upper end side of the hexagon bolt 50 so as to contact the inner surface in the axial direction of the round washer 53 and the anti-sway buffer washer 54, respectively. . The inner peripheral surface of the anti-sway cushioning rubber 55 is in close contact with the outer peripheral surface of the upper internal insertion tube 51. This close contact prevents the anti-sway cushioning rubber 55 from shifting in the horizontal direction (radial direction). The axially inner end surface of the anti-sway cushioning rubber 55 is in contact with the axial end surface of the rubber bushing 52. The upper anti-shock cushioning rubber 55 is provided so as to face the upper portion 27 of the aluminum metal fitting 26 in the vertical direction, and a gap is formed between the upper portion 27 and the upper portion 27. The lower anti-sway cushioning rubber 55 is provided so as to face the flange portion 28b of the lower portion 28 of the aluminum metal fitting in the vertical direction, and a gap is formed between the flange portion 28b.

  Further, a metal U nut 56 is screwed onto the upper end side of the hexagon bolt 50 so as to contact the upper surface of the round washer 53. The U nut 56 is positioned so that the rubber bushing 52 faces the main body portion 28a of the lower portion 28 of the aluminum fitting in the horizontal direction (radial direction) in a state where the vibration generating device is placed on the upper base 2. Yes. The U nut 56 is also positioned by the upper internal insertion tube 51 so as to be spaced from the anti-sway buffer washer 54 by a predetermined distance.

  On the other hand, a cylindrical metal lower inner insertion tube 57 is fitted on the lower end side of the hexagon bolt 50. A pair of upper and lower annular seismic bolt fixing portion cushioning rubbers (hereinafter simply referred to as cushioning rubbers) 58 and 58 are fitted on both ends of the lower inner insertion tube 57 in the axial direction. A gap is formed between the axially central portion of the lower inner insertion tube 57 and the inner periphery of the fixing hole 33a. Further, a pair of upper and lower metal round washers 59, 59 are provided on the lower end side of the hexagon bolt 50 so as to contact the outer surface in the axial direction of the buffer rubber 58, respectively. These round washers 59, 59 are positioned so as to be spaced apart from each other by the lower internal insertion tube 57. Then, in a state where the lower end side of the hexagon bolt 50 is inserted into the fixing hole 33a, the metal nut 60 screwed into the hexagon bolt 50 and the head 50a of the hexagon bolt 50 are interposed via the round washer 59 and the buffer rubber 58. The lower horizontal plate portion 33 is sandwiched from both sides in the vertical direction. As a result, the lower end side of the hexagon bolt 50 is elastically fixed and supported by the lower horizontal plate portion 33.

  According to the vibration isolator 1 constructed as described above, when the vibration generating device is operated, the vibration generated from the vibration generating device and transmitted to the upper stand 2 is insulated and absorbed by the isolator 4, which is absorbed by the lower stand 3. It is suppressed that it is transmitted to.

  In addition, when the vibration generating device vibrates greatly due to an earthquake or the like, the anti-sway cushioning rubber 55 comes into contact with the upper portion 27 and the flange portion 28b of the aluminum metal fitting 26, thereby suppressing the upper base 2 from shaking in the vertical direction. . In this way, the use of the aluminum fitting 26 suppresses the upper base 2 from swinging in the vertical direction.

  Further, when the vibration generating device vibrates greatly due to an earthquake or the like, the rubber bush 52 of the hexagon bolt 50 abuts the inner periphery of the insertion hole 23a through the aluminum fitting 26, so that the upper base 2 may shake in the horizontal direction. It is suppressed. This suppression will be described in detail below.

  Since the aluminum fitting 26 whose axial length is longer than the thickness of the upper horizontal plate portion 23 is fitted in the insertion hole 23a, the upper base 2 is shaken in the horizontal direction, and the rubber bushing 52 of the hexagon bolt 50 is formed. When abutting against the inner periphery of the insertion hole 23a via the aluminum fitting 26, compared to the case where the aluminum fitting is not fitted in the insertion hole 23, the abutting area is increased, and the hexagon bolt 50 is inserted into the insertion hole 23a. The impact in the horizontal direction when it comes into contact with the inner circumference is effectively buffered.

  Further, since the lower end side of the hexagon bolt 50 is elastically fixed to the lower horizontal plate portion 33 in a state where the upper end side is inserted into the insertion hole 23a, the upper frame 2 is shaken in the horizontal direction, When the rubber bushing 52 of the bolt 50 contacts the inner periphery of the insertion hole 23a via the aluminum fitting 26, the hexagon bolt 50 tilts in the horizontal direction, and this inclination causes the hexagon bolt 50 to contact the inner periphery of the insertion hole 23a. The shock buffer stroke and shock buffer time for buffering the horizontal shock at the time become longer, and the shock is buffered more effectively.

  Further, since the rubber bushing 52 is a damping material, the impact in the horizontal direction when the hexagon bolt 50 contacts the inner periphery of the insertion hole 23a is more effectively buffered.

  Therefore, the impact buffering property for buffering the impact in the horizontal direction when the hexagon bolt 50 contacts the inner periphery of the insertion hole 23a is improved, and the vibration generating device is damaged by the impact (for example, the internal structure is damaged). To be suppressed).

(Other embodiments)
In the above-described embodiment, the upper frame 2 and the lower frame 3 have a rectangular frame shape. However, the shape is not limited to this, and for example, a square frame shape or a shape other than the frame shape may be formed. .

  In the above embodiment, the upper horizontal plate portion 23 constitutes a part of the upper seismic bracket 22 of the upper base 2, and the lower horizontal plate portion 33 constitutes a part of the lower seismic bracket 32 of the lower base 3. However, the present invention is not limited to this, and for example, the upper horizontal plate portion may be provided integrally with the upper base 2 main body, and the lower horizontal plate portion may be provided integrally with the lower base 3 main body.

  Furthermore, in the said embodiment, although the rod-shaped member which concerns on this invention was comprised with the hexagon bolt 50, you may comprise not only this but a long screw bolt, for example.

  The means for elastically fixing the lower end side of the hexagon bolt 50 to the lower horizontal plate portion 33 is not limited to that of the above embodiment.

  Furthermore, in the said embodiment, although the stopper which concerns on this invention was comprised with the rocking | fluctuation prevention rubber | gum 55, you may comprise not only this but the plate-shaped member provided in the outer periphery of the hexagon bolt 50, for example.

  Moreover, in the said embodiment, although the metal fitting 26 was made from the aluminum die-casting, as long as it was a thing made from an inelastic body, it is not limited to this, For example, the thing made from metals other than aluminum, such as an iron thing Or it may be made of resin.

  Furthermore, in the said embodiment, although the aluminum metal fitting 26 was made into the cylindrical member, as long as the contact area with the hexagon bolt 50 becomes large, it is not limited to this, For example, as square tube members, such as a square tube member Also good.

  Further, in the above embodiment, the aluminum metal fitting 26 is of a crisp type in which the convex portion 27a of the upper portion 27 is fitted to the concave portion 28c of the lower portion 28. However, the present invention is not limited to this, and the lower portion 28 is not limited thereto. It is good also as a screwed type thing which screwed the upper part 27 into.

  Furthermore, in the said embodiment, although the lower end side of the hexagon bolt 50 was elastically fixed to the lower side horizontal board part 33, you may fix rigidly. However, elastic fixation is preferable in terms of impact buffering properties.

  In the above embodiment, the hexagon bolt 50 is elastically fixed to the lower horizontal plate portion 33 with its lower end side being elastically fixed with its upper end side being inserted into the insertion hole 23a of the upper horizontal plate portion 23. The upper end side of the bolt 50 may be elastically fixed to the upper horizontal plate portion 23 in a state where the lower end side of the bolt 50 is inserted into the insertion hole provided in the lower horizontal plate portion 33.

  As described above, the vibration isolator according to the present invention improves the shock-absorbing property for buffering the shock in the horizontal direction when the rod-shaped member comes into contact with the inner periphery of the insertion hole, and the vibration generating device is caused by the shock. It can be applied to applications where it is necessary to suppress damage to the surface.

DESCRIPTION OF SYMBOLS 1 Anti-vibration stand 2 Upper stand 22 Upper seismic bracket 23 Upper horizontal board part (One of both horizontal board parts (one horizontal board part))
23a Insertion hole 26 Aluminum fitting (tubular member)
27 Upper part (flange)
28 Lower part 28a Main body part 28b Flange part 3 Lower stand 32 Lower seismic bracket 33 Lower horizontal plate part (the other horizontal plate part (the other horizontal plate part))
4 Isolator (vibration isolation member)
5 Anti-sway device 50 Hexagon bolt (bar-shaped member)
55 Anti-sway cushion rubber (stopper)

Claims (3)

An upper base on which the vibration generating device is placed, a lower base provided below the upper base, a vibration isolating member provided between the two bases, and a vibration provided between the two bases An anti-vibration stand comprising a stop device,
The upper frame is provided with an upper horizontal plate extending in the horizontal direction,
The lower frame is provided with a lower horizontal plate portion extending in the horizontal direction so as to face the upper horizontal plate portion in the vertical direction,
The anti-sway device has a rod-like member having one end side inserted into an insertion hole provided in one of the horizontal plate portions and the other end side fixed to the other of the horizontal plate portions, and the rod-like member. Provided with a stopper for suppressing the vertical shaking of the above-mentioned upper frame,
The anti-vibration stand according to claim 1, wherein a cylindrical member having an axial length longer than the thickness of the one horizontal plate portion and an inelastic body is fitted into the insertion hole. The vibration isolator according to claim 1,
The stoppers are respectively provided on both axial sides of the cylindrical member,
The anti-vibration stand according to claim 1, wherein flange portions are formed on both ends of the cylindrical member in the axial direction so as to face the stopper in the vertical direction. In the vibration isolator according to claim 1 or 2,
The anti-vibration stand according to claim 1, wherein the other end of the rod-like member is elastically fixed to the other horizontal plate portion.

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