JPH08173479A - Magnetic levitation type vibration proof bed for vehicle - Google Patents

Abstract

PURPOSE: To always maintain the horizontal posture of a bed even when a vehicle is inclined in any direction and to effectively suppress the aberration of a lying person on the bed even when a centrifugal force or a force due to acceleration is applied to the lying person. CONSTITUTION: This magnetic levitation type vibration proof bed 1 for vehicle constituted so as to levitate a bed main body 3 with magnetic repulsion is constituted in such a way that the posture stabilization mechanism 6 of the bed is interposed between a floor F and the bed main body 3, and the posture stabilization mechanism 6 is composed of a substrate 2 which supports the bed main body 3 via a link mechanism and a magnetic levitation mechanism 5, a bowl shape body 61 provided protrudingly on the bottom of the substrate 2 and on the surface of which a spherical surface is formed, and a supporting board 62 provided with a recessed surface provided on the floor F and made to correspond to the spherical surface of a bowl shape body 61. The spherical surface of the bowl shape body 61 is fitted in the recessed surface of the supporting board 2 so as to center around the curvature of the spherical surface turnably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic levitation type anti-vibration bed for a vehicle provided with a posture stabilizing mechanism for stabilizing the posture of a bed body.

[0002]

2. Description of the Related Art Usually, a vehicle such as an emergency car is equipped with a bed for lying an emergency patient or the like. Generally, a vibration absorbing means using an elastic member is provided between the bottom of the bed and the floor, and it is devised so that the vibration of the running vehicle is not directly transmitted to a lying person on the bed. Has been done.

Conventionally, many metal members such as coil springs were used as the elastic members, but in recent years, magnets have been arranged with the magnetic pole surfaces of the same polarity facing the bottom surface of the bed and the floor surface. In addition, the repulsive force of these magnets levitates the bed above the floor, and the elastic force due to the repulsive force of the magnets absorbs vibrations. Came.

[0004]

By the way, in the conventional bed provided with the vibration absorbing means utilizing the repulsive force of the magnet as described above, the vertical vibration of the running vehicle directly causes the bed to vibrate. It is not transmitted to the bed, but is first absorbed by the elasticity of the magnet's repulsive force and then transmitted to the bed.Therefore, vertical vibration on the bed is mitigated, but when the vehicle runs on a slope or the road surface is wide. When traveling on a road that is tilted in a certain direction, the bed may also be tilted according to the tilt of the vehicle body, and the inclining of the bed may cause the lying person to be displaced on the bed.

Further, when the vehicle suddenly starts or stops, or turns a curve, a force on the bed is applied due to acceleration, and in this case as well, the person lying on the bed may be displaced. .

That is, even if the conventional vehicle bed is provided with the vibration absorbing means, it is not possible to deal with the positional deviation as described above, and as a result, the bed is comfortable and comfortable. It had a problem that it was not possible to lie down quietly, and there was a long-awaited solution to this problem.

The present invention has been made in order to solve the above-mentioned problems. Even if the vehicle is tilted in any direction, the horizontal posture of the bed is always maintained and the bed is centrifugally separated by a lying person. It is an object of the present invention to provide a magnetic levitation type vibration-proof bed for a vehicle, which can effectively suppress displacement of a lying person on the bed even if a force resulting from the force or acceleration is applied.

[0008]

According to a first aspect of the present invention, there is provided a magnetic levitation type anti-vibration bed for a vehicle, wherein the bed body is constructed so as to levitate by magnetic repulsive force. In the swing bed, a bed posture stabilizing mechanism is interposed between the floor and the bed body, and the posture stabilizing mechanism includes a substrate that supports the bed body through a link mechanism and a magnetic levitation mechanism, and a substrate for supporting the bed body. The bowl-shaped body is provided on the bottom and has a spherical surface on the surface, and the support table is provided on the floor and has a concave surface corresponding to the spherical surface of the bowl-shaped body. The center of gravity of the anti-vibration bed on the support base, including the load, is fitted into the concave surface of the support base so as to be rotatable about the center of curvature of the spherical surface, and the load is applied to the bed body. Located below the center of curvature It is characterized in that the sea urchin spherical curvature radius is set.

According to a second aspect of the present invention, there is provided a magnetic levitation vibration-proof bed for a vehicle according to the first aspect, wherein the spherical surface of the bowl-shaped body and the support base are provided. A plurality of spheres are interposed between the concave surface and the concave surface.

According to a third aspect of the present invention, there is provided a magnetic levitation type vibration damping bed for a vehicle according to the second aspect, wherein the bowl-shaped body is formed to have a uniform thickness. , A circular opening is provided in the bottom of the bowl-shaped body, and a pillar penetrating the opening and having a diameter smaller than the opening is erected from the lowermost part of the concave surface of the support, and the upper end of the pillar is A disk having a diameter larger than that of the opening having a spherical surface corresponding to the concave surface of the back surface of the bowl is fixed to, and a plurality of spheres are interposed between the disk and the back surface of the bowl. It is a feature.

A magnetic levitation type vibration damping bed for a vehicle according to claim 4 of the present invention is the magnetic levitation type vibration damping bed for a vehicle according to any one of claims 1 to 3, wherein the bed body has a center of gravity. A balance weight for adjusting the position is provided.

[0012]

According to the magnetic levitation type anti-vibration bed for a vehicle according to claim 1, the spherical surface of the bowl-shaped body provided on the bottom of the substrate is provided around the curvature center of the spherical surface on the concave surface of the support table provided on the floor. The center of gravity of the anti-vibration bed on the support base including the above-mentioned load is positioned below the center of curvature of the spherical surface when the load is applied to the bed body. Since the radius of curvature of the spherical surface is set, the bowl-shaped body is supported by the support base so as to be rotatable in all directions around the center of curvature, and in the state where no force other than gravity acts on the center of gravity, Since the center of gravity is located at the lowest position in the vertical direction, the horizontal posture of the anti-vibration bed is always maintained.

Therefore, even if the vehicle is on a road shoulder, a slope, or the like, and the floor is tilted, and even if an attempt is made to raise the vertical position of the center of gravity of the anti-vibration bed due to this tilt, the center of gravity is rotated around the spherical center of curvature with respect to the support base. It rotates relatively, so that the horizontal posture of the anti-vibration bed is maintained.

When a centrifugal force is applied to the center of gravity of the anti-vibration bed when the vehicle turns a curve, the center of gravity is rotated by the centrifugal force around the center of curvature of the spherical surface of the bowl. As a result, the anti-vibration bed is inclined in the vehicle width direction, and this inclination cancels the force of the lying person on the bed body in the vehicle width direction, and the lateral displacement of the lying person on the bed body is reliably suppressed.

Further, when a force in the front-rear direction is applied to the center of gravity of the dust-proof bed due to the acceleration generated when the vehicle suddenly starts or stops suddenly, the center of gravity rotates around the center of curvature of the bowl-shaped body due to this force. , This rotation causes the anti-vibration bed to tilt in the vehicle length direction, and this tilt cancels out the force in the vehicle length direction for the lying person on the bed body.
Vertical displacement on the bed body of a lying person is reliably suppressed.

According to the magnetic levitation type anti-vibration bed for a vehicle of the above-mentioned claim 2, since a plurality of spheres are interposed between the spherical surface of the bowl-shaped body and the concave surface of the support base, these spherical bodies are formed. The rolling causes the bowl to smoothly rotate around the center of curvature of the bowl while being supported by the support base.

According to the magnetic levitation type anti-vibration bed for a vehicle of the third aspect, the bowl-shaped body is formed to have a uniform thickness, and a circular opening is provided at the bottom of the bowl-shaped body. A support pillar penetrating this opening and having a diameter smaller than that of the opening is erected from the lowermost part of the concave surface of the support base, and the upper end of the support pillar has a spherical surface corresponding to the concave surface of the back surface of the bowl-shaped body. Since the disk with a diameter larger than the part is fixed, the bowl-shaped body is sandwiched between the spherical surface of this large-diameter disk and the concave surface of the support base, and the support state of the bowl-shaped support base is reliable. become. Since a plurality of spherical bodies are interposed between the spherical surface of the disc and the concave surface of the bowl-shaped body, the bowl-shaped body is rolled around the center of curvature of the bowl-shaped body while being pressed by the disc. It rotates smoothly.

According to the magnetic levitation type anti-vibration bed for a vehicle of the fourth aspect, since the bed body is provided with the balance weight for adjusting the position of the center of gravity, the position adjustment of the balance weight prevents the vibration. By adjusting the position of the center of gravity of the vibration bed, the vibration prevention bed can be placed in a horizontal position.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially cutaway perspective view showing an example of a magnetic levitation type vibration damping bed for a vehicle according to the present invention. Also,
2 is a sectional view taken along the line AA of FIG. 1, and FIG.
It is a B sectional view. As shown in these drawings, the anti-vibration bed 1 is basically composed of a substrate 2 provided on the floor F and a bed body 3 provided on the substrate.
A pair of vehicle-widthwise link mechanisms 4 are interposed between the board 2 and the bed body 3, and the link mechanism 4 maintains a horizontal posture even when the bed body 3 moves up and down with respect to the board 2. It is like this. Moreover, a magnetic levitation mechanism 5 is interposed between the substrate 2 and the bed body 3, and the magnetic levitation mechanism 5 causes the bed body 3 to levitate on the substrate 2.

The bed body 3 is formed by pressing a metal flat plate, and the upper surface of the bed body 3 is shown in FIG.
A pair of guide grooves 31 in the vehicle width direction for guiding the wheels S1 of the stretcher S as shown in FIG.

The link mechanism 4 is, as shown in FIG.
It is composed of a front link arm 41 and a rear link arm 42 that are obliquely provided in parallel with each other between the board 2 and the bed body 3.

The front link arm 41 is rotatably supported around a horizontal shaft 21a extending in the vehicle width direction of a bracket 21 provided on the front side portion of the base plate 2, and the bracket of the bed body 3 is also supported. A horizontal shaft 32 extending in the vehicle width direction of a bracket 32 provided behind the position 21.
It is rotatably supported around a. Further, the rear link arm 42 is rotatably supported around a horizontal shaft 22a extending in the vehicle width direction of a bracket 22 provided on the rear side portion of the board 2, and the bracket 22 of the bed body 3 is also supported. 32 provided behind the position
Is rotatably supported around a horizontal shaft 33a extending in the vehicle width direction.

The front and rear link arms 41 and 42 are parallel to the side edge of the base plate 2 between the front and rear horizontal shafts 21a and 22a and the side edge of the bed body 3 between the front and rear horizontal shafts 32a and 33a. A quadrilateral link structure is formed. Therefore, such a link mechanism 4 allows the bed body 3 to move up and down with respect to the substrate 2 while maintaining a horizontal posture.

The magnetic levitation mechanism 5 comprises a lower permanent magnet 51 provided on the central upper surface of the substrate 2 and an upper permanent magnet 52 provided on the bottom surface of the bed body 3 so as to face the lower permanent magnet 51. It is configured. The lower permanent magnet 51 and the upper permanent magnet 52 are provided so that the same poles face each other, and the bed body 3 floats above the substrate 2 by the repulsive force of the magnetic force.

The posture stabilizing mechanism 6 of the present invention is provided between the upper surface of the substrate 2 and the bottom surface of the main body 2, and the floor F
The vibration-isolating bed 1 acts so as to always maintain a horizontal posture even when tilted, and when centrifugal force or acceleration is applied to the vibration-isolating bed 1, the vibration-isolating bed 1 is appropriately adjusted according to those forces. It is supposed to lean.

Such a posture stabilizing mechanism 6 is shown in FIGS.
As shown in FIG. 3, a bowl-shaped body 61 which is provided on the bottom of the substrate 2 so as to project downward and has a spherical surface 61a formed on the surface thereof,
It is basically configured by a support base 62 provided on the floor F and having a concave surface 62a corresponding to the spherical surface 61a of the bowl-shaped body 61. The spherical surface 61a of the bowl-shaped body 61 is fitted into the concave surface 62a of the support base 62, and in this state, the bowl-shaped body 61 is formed.
Is rotatable about the center of curvature O of the spherical surface 61a in all directions.

In the present embodiment, the thickness of the bowl-shaped body 61 is set to have a uniform thickness, and a circular opening 61b is opened at the bottom. On the other hand, at the lower part of the support base 62, a support column 63 having a vertical line lowered from the center of curvature of the spherical surface 61a as an axis center in a state where the floor F and the vibration-proof bed 1 are maintained in a horizontal posture is a concave surface 62a of the support base 62. And the opening 61 of the bowl-shaped body 61.
It is erected up through b.

Specifically, a male screw portion 63a having a male screw is provided at the lower end of the column 63, and a flange portion 63b is provided above the male screw portion 63a. The male screw portion 63a protruding from the upper surface of the floor F to the lower portion of the floor F through the through hole F1 in a state of being inserted from the upper surface of the floor F into the through hole F1 formed in the floor F.
A nut N is screwed onto the shaft and the nut N is firmly fastened, so that the pillar 63 is erected at the center of the support base 62.

In addition, on the upper part of the pillar 63, the pillar 63
A male screw portion 63c having a diameter smaller than the diameter is formed, and the disc 64 is fixed to the male screw portion 63c.
The disk 64 has a spherical surface 64a corresponding to the concave surface 61c on the back surface of the bowl-shaped body 61, and the opening 61 is formed.
The size is set larger than b. Such a disc 6
An insertion hole 64b is formed in the center portion of the column 4 so as to be externally fitted to the male screw portion 63c on the upper portion of the support column 63, and the male screw portion 63c is inserted into the insertion hole 64b to insert the male screw portion 63c into the insertion hole 64b.
The disk 64 is fixed to the upper part of the support column 63 in a state in which the nut N is screwed and fastened to the portion protruding from the upper part.

In this embodiment, the bowl-shaped body 6 is used.
A plurality of spheres 65 are interposed between the spherical surface 61a of No. 1 and the concave surface 62a of the support base 62, and a disk 64 is provided.
A plurality of spheres 65 are also interposed between the spherical surface 64a of the bowl 61 and the concave surface 61c of the bowl 61, and the rolling of these spheres 65 causes the inner peripheral edge of the opening 61b of the bowl 61 to collide with the column 63. Within this range, the bowl-shaped body 61 can smoothly rotate around the center of curvature O.

Further, annular guide grooves 65a are provided in the concave surfaces 62a and 61c of the support base 62 and the bowl-shaped body 61, respectively, in plan view, and a plurality of spheres 65 are arranged above the guide grooves 65a. It is loaded in a state of being projected outward, and prevents the spherical body 65 from rolling down along the slopes of the concave surfaces 62a and 61c. In this embodiment, the position of the sphere 65 is stabilized by providing the guide groove 65a, but a known annular flat bearing is used instead of providing the guide groove 65a and loading the sphere 65 therein. You may do it.

In this embodiment, balance weights 7 for adjusting the center of gravity of the vibration-proof bed 1 are provided on both sides of the bed body 3 in the vehicle width direction. In order to mount the balance weight 7, a pair of front-rear brackets 71 are provided on the sides of the bed body 3, and a support rod 72 is bridged between the brackets 71. The balance weight 7 is slidably attached to the support rod 72.

FIG. 4 is a partially cutaway side view showing how the balance weight is attached to the support rod. As shown in this figure, the balance weight 7 is a solid cylindrical weight formed of a metal having a large specific gravity such as lead, and has a mounting hole 7a for external fitting on the support rod 72 which is formed in the longitudinal direction. It is set up. A screw hole 7b is formed so as to extend from the peripheral surface of the balance weight 7 toward the mounting hole 7a. A moderation ball 7c is fitted into the screw hole 7b from the surface, and a coil spring 7d for pressing the moderation ball 7c.
Is attached, and finally the set screw 7e is screwed into the screw hole 7b. By screwing the set screw 7e, the moderation ball 7c presses the outer peripheral surface of the support rod 72 via the coil spring 7d.

On the other hand, the outer peripheral surface of the support rod 72 is provided with a plurality of annular locking grooves 72a at equal pitches, and the moderation balls 7c are fitted in any of these annular locking grooves 72a. Thus, the position of the balance weight 7 is stably maintained. When changing the position of the balance weight 7 once set, a force may be applied to the balance weight 7 in the direction along the support rod 72. Then, the moderation ball 7c moves over the edge of the annular locking groove 72a against the biasing force of the coil spring 7d, so that the balance weight 7 can be easily moved.

Since the moderation balls 7c reach the adjacent annular locking grooves 72a, the moderation balls 7c are fitted into the annular locking grooves 72a by the urging force of the coil spring 7d. It is recognized that the balance weight 7 has moved horizontally on the support rod 72 by one pitch.

Further, according to the present invention, in a state where the floor F and the vibration-proof bed 1 are maintained in the horizontal posture, on the extension line (indicated by a one-dot chain line in FIG. 2) above the axial center of the pillar 63. Therefore, the bowl-shaped body 61 is arranged so that the center of gravity M of the vibration-proof bed 1 is located below the center of curvature O of the bowl-shaped body 61.
And the weight balance of the anti-vibration bed 1 are set. To adjust the position of the center of gravity, the position of the balance weight 7 on the support rod 72 is adjusted.

5A and 5B are explanatory views for explaining the posture restoring force of the anti-vibration bed. FIG. 5A is a state where the anti-vibration bed is in a horizontal posture, and FIG. 5B is a state where the anti-vibration bed is tilted. (C)
Shows the state in which the support base 62 is tilted. It should be noted that these figures show a state in which the centrifugal force or acceleration generated by the driving state of the vehicle is not applied to the vibration-proof bed 1.

First, in the state shown in FIG. 5A, the spherical surface 61 a of the vibration-proof bed 1 is the concave surface 62 a of the support base 62.
Is supported by a support 62 along the center of curvature O
Since it can be rotated around, the object having the weight W is in the same state as being suspended from the center of curvature O, and thus the horizontal posture of the vibration isolation bed 1 is stably maintained. Has become.

Next, as shown in FIG. 5B, for example, when the anti-vibration bed 1 is rotated about the center of curvature O counterclockwise by a predetermined angle, the weight W is equal to the center of curvature O and anti-vibration. Component force Wy toward the extension of the line connecting the center of gravity M of the bed 1,
This component force Wy is decomposed into a component force Wx in a direction perpendicular to this component force Wy.
The movement of the center of gravity due to the force in the component force Wy direction is caused by the support 6
In the state of being blocked by 2, the center of gravity M is rotated clockwise around the center of curvature O by the component force Wx, and the tilt of the vibration-proof bed 1 is restored to the original horizontal posture.

As shown in (b), the anti-vibration bed 1
When the weight of the recumbent 100 lying on the anti-vibration bed 1 is w in an inclined state, the component force wy in the direction perpendicular to the bed surface and the component force wx parallel to the bed surface are decomposed. This component force wx exerts a force on the lying person 100 to shift the position to the left in the drawing.
Rapidly returns to the horizontal posture, so that the positional deviation is effectively suppressed.

Further, as shown in FIG. 5C, when the support base 62 is tilted, the support base 62 rotates around the center of curvature O, so that the horizontal posture of the vibration-proof bed 1 is maintained. Leave.

As described above, in the present invention, the center of gravity M of the anti-vibration bed 1 is positioned below the center of curvature O of the bowl-shaped body 61. Even if the floor F tilts as a result, the anti-vibration bed 1 can maintain the horizontal posture, and the bed body 3
A situation in which a person lying on the bed is displaced due to the inclination of the bed body 3 is surely avoided, and as a result, the lying position becomes stable.

Further, as shown in FIG. 7, when a centrifugal force Wz is applied to the anti-vibration bed 1 by the turning of the vehicle, the resultant force of the centrifugal force Wz and the gravity (weight W) of the center of gravity M is calculated. Since the anti-vibration bed 1 is inclined so that the direction thereof coincides with the extension line of the straight line connecting the center of curvature O and the center of gravity M, the anti-vibration bed 1 rotates around the center of curvature O, and the bed body by this rotation is rotated. The inclination of 3 in the vehicle width direction cancels the influence of the centrifugal force on the lying person on the bed body 3 and effectively prevents the lying person from being displaced.

Although not shown, when the vehicle suddenly starts, a backward force acts on the center of gravity M of the anti-vibration bed 1. This force causes the anti-vibration bed 1 to rotate about the center of curvature O so that the rear end of the anti-vibration bed 1 rises. Therefore, the tilt of the anti-vibration bed 1 due to this rotation raises the influence of acceleration. The rearward displacement of the lying person on the bed body 3 in the vehicle length direction is effectively suppressed.

Similarly, when the vehicle suddenly stops, a forward force acts on the center of gravity of the anti-vibration bed 1, and the force causes the bed body 3 to incline forward, and this inclination causes the bed body 3 to recline. The displacement of the vehicle frontward in the vehicle length direction is effectively suppressed.

In the above embodiment, the spherical body 65 is interposed between the spherical surface 61a of the bowl-shaped body 61 and the concave surface 62a of the support base 62, and the spherical surface 64a of the disk 64 and the concave surface 61c of the bowl-shaped body 61 are provided. However, the present invention is not limited to the interposition of the sphere 65 between them, and in particular, the lubrication oil may be provided between the contact surfaces without interposing the sphere 65. May be applied.

Further, in the above embodiment, the support base 62
The column 63 is provided upright in the center of the column 63, and a disc 64 is provided at the tip of the column 63. The disc 64 presses the concave surface 61c of the bowl-shaped body 61.
It is not limited to the provision of the disc 64 and the disc 64, and they may not be provided.

[0048]

As described in detail above, the magnetic levitation type vibration damping bed for a vehicle according to claim 1 of the present invention includes a substrate for supporting the bed main body via a link mechanism and a magnetic levitation mechanism, and this substrate. A posture stabilizing mechanism is provided, which comprises a bowl-shaped body that is convexly provided on the bottom part of the bowl and has a spherical surface formed on the surface, and a support table that is provided on the floor and has a concave surface corresponding to the spherical surface of the bowl-shaped body. Yes, the spherical surface of the bowl-shaped body is fitted into the concave surface of the support table so as to be rotatable around the center of curvature of the spherical surface, and on the support table including the above-mentioned load when a load is applied on the bed body. The radius of curvature of the spherical surface is set so that the center of gravity of the vibration isolating bed is located below the center of curvature of the spherical surface.

Therefore, even if the vehicle is on a road shoulder or a slope and the floor is tilted, and the inclination is used to raise the vertical position of the center of gravity of the anti-vibration bed, the position of the center of gravity is about the center of curvature of the spherical surface with respect to the support base. It rotates relatively, so that the horizontal posture of the anti-vibration bed is maintained.

When a centrifugal force is applied to the center of gravity of the anti-vibration bed as the vehicle turns a curve, this center of gravity causes the center of gravity to rotate about the center of curvature of the spherical surface of the bowl. As a result, the anti-vibration bed is inclined in the vehicle width direction, and this inclination cancels the force of the lying person on the bed body in the vehicle width direction, and the lateral displacement of the lying person on the bed body is reliably suppressed.

Further, when a force in the front-rear direction is applied to the center of gravity of the dust-proof bed due to the acceleration generated when the vehicle suddenly starts or stops suddenly, the center of gravity rotates around the center of curvature of the bowl-shaped body due to this force. , This rotation causes the anti-vibration bed to tilt in the vehicle length direction, and this tilt cancels out the force in the vehicle length direction for the lying person on the bed body.
Vertical displacement on the bed body of a lying person is reliably suppressed.

As described above, the anti-vibration bed inclines relative to the floor in a direction in which the recumbent does not shift the position of the recumbent lying on the bed body. The lying position of the lying person becomes stable. Therefore, the anti-vibration bed can be suitably used especially for an ambulance vehicle in which a lying person needs to rest.

According to the magnetic levitation type anti-vibration bed for a vehicle according to claim 2 of the present invention, a plurality of spheres are interposed between the spherical surface of the bowl-shaped body and the concave surface of the support base. The rolling of the sphere allows the bowl to rotate smoothly around the center of curvature of the bowl while being supported by the support table, and the anti-vibration bed moves around the center of curvature of the bowl relative to the floor. This is convenient for good relative rotation.

According to the magnetic levitation type anti-vibration bed for a vehicle of claim 3 of the present invention, the bowl-shaped body is formed with a uniform thickness, and a circular opening is provided at the bottom of the bowl-shaped body. A pillar that penetrates the opening and has a diameter smaller than that of the opening is erected from the lowermost part of the concave surface of the support, and the upper end of the pillar has a spherical surface corresponding to the concave surface of the back surface of the bowl-shaped body. Since the disk having a diameter larger than that of the opening is fixed, the bowl-shaped body is sandwiched between the spherical surface of this large-diameter disk and the concave surface of the support base 62, and is supported by the support body of the bowl-shaped body. The state becomes certain. Since a plurality of spherical bodies are interposed between the spherical surface of the disc and the concave surface of the bowl-shaped body, the bowl-shaped body is rolled around the center of curvature of the bowl-shaped body while being pressed by the disc. It rotates smoothly.

According to the magnetic levitation type anti-vibration bed for a vehicle according to claim 4 of the present invention, since the bed body is provided with a balance weight for adjusting the position of the center of gravity, the position adjustment of the balance weight is performed. By adjusting the position of the center of gravity of the anti-vibration bed, the anti-vibration bed can be placed in a horizontal posture, which is convenient.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of a magnetic levitation type vibration damping bed for a vehicle according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a partially cutaway side view showing an example of a balance weight.

FIG. 5 is an explanatory diagram for explaining the posture restoring force of the anti-vibration bed, in which (a) is a state in which the anti-vibration bed is in a horizontal posture,
(B) is the state where the anti-vibration bed is tilted, and (c) is the support base 62.
Shows the tilted state.

6 is a cross-sectional view taken along the line BB in FIG. 1, showing a state where the floor of the vehicle body is inclined in the vehicle width direction.

FIG. 7 is a cross-sectional view taken along the line BB of FIG. 1, showing a state in which the anti-vibration bed is inclined in the vehicle width direction.

[Explanation of symbols]

 1 Anti-vibration Bed 2 Substrate 21, 22, 32, 33 Bracket 21a, 22a Horizontal Axis 3 Bed Main Body 31 Guide Groove 32a, 33a Horizontal Axis 4 Link Mechanism 5 Magnetic Levitation Mechanism 51 Lower Permanent Magnet 52 Upper Permanent Magnet 6 Posture Stabilization Mechanism 61 Bowl-shaped body 61a Spherical surface 61b Opening 61c Concave surface 62 Support base 62a Concave surface 63 Strut 63a Male screw portion 63b Flange portion 63c Male screw portion 64 Disc 64a Spherical 64b Insertion hole 7 Balance weight 7a Screw hole 7c Screw hole 7c 7d Coil spring 71 Bracket 72 Support rod 72a Annular locking groove F Floor F1 insertion hole O Curvature center M Center of gravity S Stretcher S1 Wheel S1

Claims (4)

[Claims] 1. A magnetic levitation type anti-vibration bed for a vehicle, the bed body of which is configured to levitate by magnetic repulsive force, wherein a bed posture stabilizing mechanism is interposed between the floor and the bed body. This posture stabilizing mechanism includes a substrate that supports the bed body via a link mechanism and a magnetic levitation mechanism,
The bowl-shaped body is provided on the bottom of the substrate so as to project and a spherical surface is formed on the surface, and the support table is provided on the floor and has a concave surface corresponding to the spherical surface of the bowl-shaped body. The spherical surface is fitted into the concave surface of the support table so as to be rotatable about the center of curvature of the spherical surface, and the center of gravity of the vibration-proof bed on the support table including the load is applied when the load is applied on the bed body. A magnetic levitation type anti-vibration bed for a vehicle, wherein a radius of curvature of the spherical surface is set so as to be located below a center of curvature of the spherical surface. 2. The magnetic levitation vibration-proof bed for a vehicle according to claim 1, wherein a plurality of spheres are interposed between the spherical surface of the bowl-shaped body and the concave surface of the support base. 3. The bowl-shaped body is formed to have a uniform thickness, a circular opening is provided at the bottom of the bowl-shaped body, and a column having a diameter smaller than that of the opening penetrates the opening. Standing from the bottom of the concave surface of the support base, a disk with a diameter larger than the above-mentioned opening having a spherical surface corresponding to the concave surface of the back surface of the bowl-shaped body is fixed to the upper end of this pillar, and this disk and bowl-shaped The magnetic levitation type vibration damping bed for a vehicle according to claim 2, wherein a plurality of spheres are interposed between the sphere and the back surface of the body. 4. The magnetic levitation vibration-proof bed for a vehicle according to claim 1, wherein the bed body is provided with a balance weight for adjusting the position of the center of gravity.