JPH08154782A - Stopper structure of magnetic floating type vibration proof bed - Google Patents

Abstract

PURPOSE: To prevent the collision of magnetic pole surfaces by setting the mutual shapes of upper and lower stoppers so that a head body abuts on a height of an upper limit and a top end face abuts on a height of a lower limit. CONSTITUTION: The repulsive force of magnets is excessive in the absent state of load of a stretcher, etc., on the bed body 3 and, therefore, the bed body 3 rises up to the upper limit position of a permissible range. Consequently, a buffer material 7 of the upper stopper 62 abuts on the side part of the lower stopper 61 and the upper stopper 62 is put into the state of pressing the lower stopper 61. Then, the vibration of the bed 3 by the vibration of a vehicle is effectively prevented. Next, the bed body 3 tends to descend beyond the permissible range when the stretcher is placed on the bed body 3, but the base of the bed body 3 abuts on the peak part of the lower stopper 62 and does not descend any more. The magnetic pole surface of the lower permanent magnet 51a and the magnetic pole surface of the upper permanent magnet 52a do not come into collision against each other and the failure of the magnets is effectively prevented.

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 stopper structure constructed such that a bed body is levitated on a floor by utilizing magnetic repulsive force.

[0002]

2. Description of the Related Art Conventionally, a vibration-proof bed as shown in FIG. 5 is known. The anti-vibration bed B includes a pair of front and rear support rods R rotatably provided on a floor F around a support shaft, and a bed body B1 pivotally supported by the support shaft at the tip of the support rod R. It is basically composed of Then, the pair of front and rear support rods R and the bed body B1
And the floor F form a parallelogram link structure,
The bed body B1 can move up and down while being restricted by this link structure.

Magnets M having the same poles facing each other are provided on the bottom surface of the bed body B1 and the floor F.
With the repulsive force of the magnet M and the weight of the bed body B1 being balanced, the bed body B1 is magnetically levitated on the floor F, as shown in FIG. When such an anti-vibration bed B is installed in, for example, an ambulance and the stretcher S carrying a patient is placed on the bed body B1, their weight is also added to the bed body B1 and the repulsive force of the magnet M is added. Against this, the bed body B1 descends, and as shown in FIG.
As shown in, the repulsive force of the magnet M and the added weight are properly balanced. In this state, the vibration of the vehicle body is absorbed by the elastic force caused by the repulsive force of the magnet M, so that the vibration of the vehicle body is not directly transmitted to the bed body B1.

Therefore, since the vibration of the running vehicle is not directly transmitted to the patient lying on the stretcher S through the anti-vibration bed B, the lying state is stable. Since such a magnetic levitation type vibration damping structure is superior in vibration absorption efficiency to the spring type and has a simple structure, many vibration proof structures will be replaced by the magnetic levitation type in the future. There is a situation.

[0005]

By the way, in the conventional vibration-proof bed B as described above, the weight and magnet of the bed body B1 under the load of the stretcher S or the like carrying an emergency patient are applied. Since it is designed so that the repulsive force of M is properly balanced and the vibration is reliably absorbed, as shown in (a) of FIG. 5 when the load is not applied on the bed body B1. The bed body B1 is in a state of jumping up.

Therefore, when the vehicle is run with no load on the bed body B1, the light bed body B1 vibrates rattling due to the vibration of the floor F, which causes the passenger to feel uncomfortable. It was

On the contrary, when the load on the bed body B1 is excessive, the bed body B caused by the vibration of the floor F is generated.
There is a problem that the magnetic pole surfaces of the upper and lower magnets M may collide with each other due to the vertical movement of the No. 1 floor F, and the magnet M will be damaged if such a collision occurs.

The present invention has been made to solve the above-mentioned problems, and the bed body can be maintained within a proper allowable range of vertical movement, and as a result, the bed body can jump up and fall. It is an object of the present invention to provide a stopper structure for a magnetic levitation type vibration damping bed capable of preventing collision between magnetic pole surfaces of a magnet.

[0009]

In the stopper structure for a magnetic levitation type anti-vibration bed according to claim 1 of the present invention, a bed body is provided on a floor of a vehicle so as to be vertically movable in a horizontal posture via a link mechanism. And a stopper structure for a magnetically levitated vibration damping bed for a vehicle, which is configured to levitate by a magnetic repulsive force, wherein one or both of the bottom surface of the bed main body and the top surface of the floor is a bed. It is characterized in that a stopper is provided to prevent the main body from moving out of the allowable range of vertical movement with respect to the floor.

According to the stopper structure of the magnetic levitation type anti-vibration bed according to claim 2 of the present invention, the bed body is provided on the floor of the vehicle so as to be vertically movable in a horizontal posture via a link mechanism,
Further, the stopper structure of the magnetic levitation type anti-vibration bed for vehicles configured to levitate by magnetic repulsion force, in which an upper stopper is hung from the bed body, and a lower stopper corresponding to the upper stopper is hung on the floor. The upper stopper and the lower stopper are set up so that the upper stopper and the lower stopper come into contact with each other when the bed is positioned at the upper limit of the allowable range of vertical movement of the bed with respect to the floor. The upper stopper or the lower stopper is dimensioned so that the tip surface of the upper stopper or the lower stopper comes into contact with the floor or the bed body when the bed body is positioned at the lower limit of the above allowable range. It is what

The stopper structure of the magnetic levitation type vibration damping bed according to claim 3 of the present invention is the stopper structure of the magnetic levitation type vibration damping bed according to claim 2, wherein the link mechanism is a parallelogram link mechanism. , The upper stopper and the lower stopper are formed in a columnar shape, and these stoppers are
It is characterized in that the bed main body is positioned so that one side portion of the bed main body comes into contact with the bed main body at a maximum height of an allowable range of vertical movement with respect to the floor.

A stopper structure for a magnetic levitation type vibration proof bed according to a fourth aspect of the present invention is the stopper structure for a magnetic levitation type vibration proof bed according to the second aspect, wherein the upper stopper and the lower stopper are provided with a tip portion to each other. An upper protrusion and a lower protrusion extending in opposite directions are provided, and the upper protrusion and the lower protrusion stop each other in a state where the bed main body is positioned at the upper limit height of the allowable range of vertical movement of the bed main body with respect to the floor, It is characterized in that the upper and lower projections are unlocked when the bed main body is positioned lower than the upper limit height.

According to a fifth aspect of the present invention, there is provided a stopper structure for a magnetic levitation type vibration proof bed according to any one of the second to fourth aspects, in which the upper stopper and the lower stopper are provided. Cushioning materials are provided on the end surfaces of the upper stopper and the lower stopper that stop against each other and the floor or the bed body.

[0014]

According to the stopper structure of the magnetic levitation type anti-vibration bed described in claim 1, the bed main body is allowed to move up and down with respect to the floor on either or both of the bottom surface of the bed main body and the upper surface of the floor. Since there is a stopper that prevents the bed body from falling out of the range, when there is no load on the bed body, the bed body is pushed up by the magnetic repulsive force, but at the upper limit of the allowable range The bed body will not rise above the upper limit of the allowable range.

Also, since the bed body does not descend below the lower limit height of the above allowable range due to the action of the stopper, the collision of the upper and lower magnetic pole surfaces is prevented.

According to the stopper structure of the magnetic levitation type vibration-proof bed according to claim 2, the upper stopper hung from the side portion of the bed main body in the vehicle width direction and the lower stopper erected on the floor are: Since the bed body is set so that it stops against each other when the bed body is positioned at the upper limit of the allowable vertical movement range with respect to the floor, when there is no load on the bed body, magnetic repulsion force Although the bed body is pushed up, the upper stopper and the lower stopper come into contact with each other at the upper limit height of the allowable range, and this stopped state becomes strong by the magnetic repulsive force. Therefore, the bed body does not rattle due to the vibration of the vehicle.

Further, the upper stopper or the lower stopper is dimensioned so that the tip surface of the upper stopper or the lower stopper comes into contact with the floor or the bed body when the bed body is positioned at the lower limit height of the above-mentioned allowable range. Therefore, the collision prevents the upper and lower magnetic pole surfaces from colliding.

According to the stopper structure of the magnetic levitation type vibration damping bed according to the third aspect, when the bed body reaches the upper limit height, the mutually facing side surfaces of the upper stopper and the lower stopper come into contact with each other. , Further raising of the bed body is prevented.

According to the magnetic levitation type vibration-proof bed stopper structure of the above-mentioned claim 4, when the bed body reaches the upper limit height, the upper protrusion and the lower protrusion stop against each other,
Further raising of the bed body is prevented.

According to the stopper structure of the magnetic levitation type anti-vibration bed of the fifth aspect, the portions of the upper stopper and the lower stopper that are in contact with each other and the tips of the upper stopper or the lower stopper that are in contact with the floor or bed body. The cushioning material provided on each of the surfaces reduces the impact between the stoppers and the impact at the time of the collision between the tip surface of any one of the stoppers and the floor or the bed body.

[0021]

FIG. 1 is a perspective view showing an example of a vibration-proof bed to which a stopper structure according to the present invention is applied. First, the anti-vibration bed 1 will be described with reference to this drawing. Anti-vibration bed 1
The frame 2 is disposed on the floor F of the vehicle in parallel with the vehicle length direction, the bed main body 3 is provided on the upper portion of the frame 2 with a predetermined gap, the bed main body 3 and the frame 2 And a magnetic levitation mechanism 5 for levitating the bed main body on the floor F.

A pair of lower bearings 21 in the vehicle length direction are provided on the upper surface of the frame 2, and upper bearings 31 corresponding to the lower bearings 21 are provided on the bottom surfaces of the bed body 3 on both sides in the vehicle width direction. Is provided. This upper bearing 3
1 is provided at a position slightly rearward (rightward in FIG. 1) from a position directly above the lower bearing 21.

The bed body 3 is formed into a rectangular parallelepiped having an opening at the bottom by pressing a flat plate made of metal. A guide recess 32 extending in the vehicle length direction is provided on the upper surface of the bed body 3, and the guide recess 32 guides the wheel S1 of the stretcher S on the bed body 3.

The link rod 4 includes a lower bearing 21 on the front side (left side in FIG. 1) and an upper bearing 3 on the front side of the bed body 3.
A pair of front link arms 4 extending in the vehicle length direction between the front link arms 4 and
1 and a rear link arm 42. The front link arm 41 is axially supported by a link shaft 41a supported by the front lower bearing 21 and extending in the vehicle width direction, and a link shaft 41b supported by the front upper bearing 31 and extending in the vehicle width direction. It is rotatable about both link shafts 41a and 41b.

The rear link arm 42 has a link shaft 42 supported by a rear lower bearing 21 and extending in the vehicle width direction.
a and a link shaft 42b supported by the rear upper bearing 31
And link shafts 42a, 42b.
It can be rotated around.

The effective length of the front link arm 41 (the distance between the link shafts) and the effective length of the rear link arm 42 are set to the same length and are arranged in parallel with each other. Therefore, both link arms 41 and 42 and the link shaft 4
Frame 2 between 1a and 42a and link shafts 41b and 42
A parallelogrammatic link mechanism is formed between the b and the bed body 3.

On the other hand, the magnetic levitation mechanism 5 includes an upper magnet housing box 52 provided on the back surface of the bed body 3, a lower magnet housing box 51 provided between the pair of frames 2, and the upper magnet housing box. Upper permanent magnet 5 housed and fixed in 52
2a and a lower permanent magnet 51a housed and fixed in the lower magnet housing box 51. The upper magnet housing box 52 has an opening in the lower surface thereof, and the lower magnet housing box 51 has an opening in the upper surface thereof, and the openings are positioned so as to face each other. In addition, the lower permanent magnet 51a and the upper permanent magnet 52a housed in the magnet housing boxes 51 and 52 have the same poles facing each other, and the bed body 3 floats above the floor F by their repulsive force. It has become.

Therefore, when the vibration of the vehicle in the vertical direction occurs and the floor F moves up and down, the up and down movement is caused by the magnetic levitation mechanism 5.
Is transmitted to the bed body 3 via the magnetic repulsive force acting between the lower permanent magnet 51a and the upper permanent magnet 52a of
The magnetic repulsive force has a function as an elastic member, and since the bed body 3 tries to maintain the current position due to inertia, the floor F moves up and down with respect to the bed body 3 via the link rod 4. As a result, the vibration of the floor F is prevented from being directly transmitted to the bed body 3, and the bed body 3 is reliably vibration-proofed.

In the present invention, the bed body 3 is provided at the center of both sides in the vehicle width direction of the vibration-proof bed 1 as described above.
A stopper structure 6 is provided for suppressing the vertical movement of the device within an allowable range. In this embodiment, the stopper structure 6 is used.
Is a plate-like upper stopper 62 that is hung from both sides of the bed body 3 in the vehicle width direction, and a lower stopper 61 that is erected on the frame 2 so as to correspond to the upper stopper 62.
It consists of and.

The upper stopper 62 and the lower stopper 62 are so arranged that the upper stopper 62 and the lower stopper 61 come into contact with each other in a state where the bed body 3 is positioned at the upper limit of the allowable range of vertical movement of the bed body 3 with respect to the floor F. Stopper 6
1 mutual shapes and dimensions are set. In this embodiment, an L-shaped member is used as the upper stopper 62, one side portion of this L-shaped member is fixed to the back surface of the bed body 3 by welding or the like, and the other side portion is suspended. Further, the lower stopper 61 is formed in a columnar shape, and the columnar body is erected on the frame 2 with the rear side surface corresponding to the front side surface of the upper stopper 62.

Further, in this embodiment, the length of the lower stopper 61 in the vertical direction is set to be longer than the length of the upper stopper 62 in the vertical direction, and the bed body 3 reaches the lower limit height of the allowable range. Then, the top of the lower stopper 61 comes into contact with the back surface of the bed body 3.

Regarding the allowable range of vertical movement of the bed main body 3, the lower limit value is such that the magnetic pole surface of the lower permanent magnet 51a and the magnetic pole surface of the upper permanent magnet 52a do not come into contact with each other even when the bed main body 3 descends. The height dimension is set, and the upper limit value is set to the height dimension before reaching the top dead center of the bed main body 3 which is not loaded by the magnetic repulsive force.

The present invention is not limited to setting the length of the lower stopper 61 longer than the length of the upper stopper 62, but setting the lower stopper 61 longer than the upper stopper 62. The lower end of the upper stopper 62 may be stopped by the frame 2 when the bed body 3 reaches the lower limit of the allowable range.

In the present embodiment, the cushioning material 7 having elasticity such as rubber is provided on the surface of the lower stopper 61 facing the upper stopper 62 and on the upper end surface of the lower stopper 61.
The shock absorber 7 is attached to the lower stopper 61 and the upper stopper 62 at the time of collision,
The impact at the time of a collision between the back surface of the bed body 3 and the top of the lower stopper 61 is mitigated.

The operation of this embodiment will be described below with reference to FIGS. 2 and 3 are explanatory views of a side view of the anti-vibration bed. FIG. 2 shows a state in which the bed body is at the upper limit position of the allowable range, and FIG. 3 shows a state in which the bed body is at the lower limit position of the allowable range. Each state is shown.

First, as shown in FIG. 2, when there is no load such as the stretcher S on the bed body 3, the magnetic repulsive force of the magnetic levitation mechanism 5 is excessive compared to the weight of the bed body 3, The bed body 3 is lifted to the upper limit position of the allowable range, and as a result, the cushioning material 7 of the upper stopper 62 is abutted against the side portion of the lower stopper 61, and the upper stopper 62 presses the lower stopper 61. Therefore, the vibration of the bed body 3 due to the vibration of the vehicle is effectively suppressed.

Next, when the stretcher S on which the emergency patient is placed is placed on the bed body 3, the weight of the stretcher S is added to the bed body 3, and the bed body 3 is lowered by the weight increase amount. Normally, at a height position within the allowable range, when the floor F vibrates due to the action of the magnetic levitation mechanism 5, the floor F moves up and down within the allowable range.

When the floor F greatly moves up and down due to the vehicle bouncing or the like, the amplitude of the vertical movement of the bed body 3 with respect to the floor F increases, and the bed body 3 tries to descend beyond the allowable range. As shown in FIG.
Since the bottom surface of the bed main body 3 stops at the top of the lower stopper 61 and does not descend further, the magnetic pole surfaces of the lower permanent magnet 51a and the upper permanent magnet 52a do not collide with each other and the magnet is damaged. Is effectively prevented.

FIG. 4 is a perspective view showing a vibration-proof bed to which a stopper structure of another example is applied. The structure of the anti-vibration bed 1a except for the stopper structure 6a of the present embodiment is exactly the same as the anti-vibration bed 1 of the previous example. And in this embodiment,
The stopper structure 6a includes a lower stopper 63, which is fixed to the upper center of the frame 2 and has a U-shaped cross section, and a cross section provided on the bottom surface of the bed main body 3 in the vehicle width direction corresponding to the lower stopper 63. The upper stopper 64 has a U-shape when viewed from the outside.

The lower stopper 63 is fixed to the frame 2 with the U-shaped opening facing the magnetic levitation mechanism 5. A lower protrusion 63a extending in the vehicle length direction is formed above the lower stopper 63.
On the other hand, the upper stopper 64 is fixed to the bottom surface of the bed body 3 with the U-shaped opening facing outward.
An upper protrusion 64a extending in the vehicle length direction is formed below the upper stopper 64.

The lower protrusion 63a is positioned above the upper protrusion 64a so that the upper portion of the lower stopper 63 and the lower portion of the upper stopper 64 face each other.

In the case of the present embodiment, the height of the lower stopper 63 is set so that the bottom portion of the bed body 3 comes in contact with the lower protrusion 63a at the lower limit height of the bed body 3, and the upper stopper 64 is provided. The height of the bed body 3
Lower projection 63a and upper projection 64a at the upper limit height of
And are dimensioned so that they stop against each other.

Therefore, in the anti-vibration bed 1a of this embodiment, when there is no load on the bed body 3, the magnetic repulsive force of the magnetic levitation mechanism 5 causes the bed body 3 to rise upward, but at the top dead center. Before reaching, the upper protrusion 64a has the lower protrusion 6
Even when the bed body 3 is stopped, the bottom surface of the bed body 3 contacts the lower protrusion 63a and does not descend further even if the bed body 3 is lowered due to an excessive load on the bed body 3.

Therefore, when the bed body 3 in the unloaded state is shaken by the vibration of the vehicle or the bed body 3 is lowered due to excessive load, the upper and lower magnetic pole surfaces of the magnetic levitation mechanism 5 collide with each other and the magnets are damaged. Such inconvenience can be effectively avoided.

In the above embodiment, the upper stopper and the lower stopper are provided on both sides of the vibration isolating bed 1 in the vehicle width direction, but in the present invention, the upper stopper and the lower stopper are the vibration isolating bed 1. It is not limited to being provided on both sides in the vehicle width direction, but only one set may be provided at the center of either side in the vehicle length direction.

Further, in the above embodiments, the bed body 3 and the frame 2 are provided with a lower stopper and an upper stopper, respectively, and mutual interference between them and interference between these and the bed body 3 or the floor F are utilized. Although the bed main body 3 is prevented from exceeding the allowable range of vertical movement, the present invention is not limited to providing the bed main body 3 and the frame 2 with the upper stopper and the lower stopper, respectively. By properly setting and setting the dimensions, it is possible to regulate the range of vertical movement of the bed body 3 within an allowable range by a stopper provided only on the bed body 3 or the floor F.

[0047]

According to the magnetic levitation type anti-vibration bed stopper structure of the present invention, the bed main body is attached to the floor on either or both of the bottom surface of the bed main body and the upper surface of the floor. Since there is a stopper that prevents the bed body from moving out of the allowable range of vertical movement, when there is no load on the bed body, the bed body is pushed up by the magnetic repulsive force, but at the upper limit of the allowable range. The bed does not rise above the upper limit of the allowable range due to the action of the stopper, and even if the load on the bed becomes excessive, the action of the stopper lowers the bed below the lower limit of the above allowable range. Therefore, the collision of the upper and lower magnetic pole surfaces is prevented, and the rattling of the bed body and the damage of the magnet are effectively prevented.

According to the stopper structure of the magnetic levitation type anti-vibration bed of the second aspect of the present invention, the upper stopper hung from the side portion of the bed main body in the vehicle width direction and the lower stopper erected on the floor. Are set so that they stop each other when the bed is positioned at the upper limit of the allowable range of vertical movement of the bed, so if there is no load on the bed, the magnetic repulsion will occur. Although the bed body is pushed upward by the force, the upper stopper and the lower stopper come into abutment with each other at the upper limit height of the allowable range, and the abutment state becomes strong by the magnetic repulsive force. Therefore, the bed body does not rattle due to the vibration of the vehicle.

Further, the upper stopper or the lower stopper is dimensioned so that the tip surface of the upper stopper or the lower stopper abuts on the floor or the bed body in a state where the bed body is positioned at the lower limit height of the above allowable range. Therefore, the collision prevents the upper and lower magnetic pole surfaces from colliding with each other.

Therefore, the bed main body can be maintained within an appropriate allowable range of vertical movement, and it is possible to prevent the bed main body from jumping up and the magnetic pole surfaces of the magnets from colliding with each other. This is advantageous in that it is possible to effectively suppress the occurrence of the occurrence of magnetism and effectively prevent damage to the magnet.

According to the stopper structure of the magnetic levitation type vibration-proof bed according to claim 3 of the present invention, the parallelogram link mechanism is used as the link mechanism, and the upper stopper and the lower stopper are formed in a columnar shape. Are positioned so that one side of each bed stops while the bed body is positioned at the upper limit height of the allowable range of vertical movement of the bed body relative to the floor, so the bed body reaches the upper limit height. In this case, the side surfaces of the upper stopper and the lower stopper facing each other come into contact with each other, and the bed body is prevented from further rising.

According to the stopper structure of the magnetic levitation type anti-vibration bed of the fourth aspect of the present invention, the upper and lower stoppers are provided at their tips with upper and lower protrusions extending in directions opposite to each other. The upper protrusion and the lower protrusion stop against each other when the bed body is positioned at the upper limit of the allowable range of vertical movement of the body relative to the floor, and the upper part is positioned when the bed body is positioned lower than the upper limit height. Since the projections and the lower projections are unlocked, when the bed body reaches the upper limit height, the upper projections and the lower projections come into contact with each other,
Further raising of the bed body is prevented.

According to the stopper structure of the magnetic levitation type anti-vibration bed of the fifth aspect of the present invention, the upper stopper and the lower stopper are in contact with each other, and the upper stopper or the lower stopper is in contact with the floor or the bed body. Since the cushioning material is provided on the tip surface of the, the cushioning material reduces the impact when the stoppers collide with each other and between the tip surface of one of the stoppers and the floor or bed body. This is effective for comfortable driving such as suppressing noise.

[Brief description of drawings]

FIG. 1 is a perspective view showing a vibration-proof bed to which an example of a stopper structure according to the present invention is applied.

FIG. 2 is an explanatory side view for explaining the operation of the stopper structure shown in FIG. 1, showing a state in which a lower stopper and an upper stopper are in abutment with each other.

FIG. 3 is an explanatory view in side view for explaining the operation of the stopper structure shown in FIG. 1, showing a state in which the top portion of the lower stopper and the bed body are in contact with each other.

FIG. 4 is a perspective view showing a vibration-proof bed to which another example of the stopper structure according to the present invention is applied.

FIG. 5 is an explanatory view of a side view of a conventional magnetic levitation type anti-vibration bed, (a) showing a state in which there is no load on the bed body,
(B) shows a state where there is a load on the bed body.

[Explanation of symbols]

 1 Vibration-Proof Bed 2 Frame 21 Lower Bearing 3 Bed Main Body 31 Upper Bearing 32 Guide Recess 4 Link Rod 41 Front Link Arm 42 Rear Link Arm 41a, 41b, 42a, 42b Link Shaft 5 Magnetic Levitation Mechanism 51 Lower Permanent Magnet Storage Box 51a Lower Permanent magnet 52 Upper magnet housing box 52a Upper permanent magnet 6 Stopper structure 61,63 Lower stopper 62,64 Upper stopper 63a Lower protrusion 64a Upper protrusion F Floor S Stretcher S1 Wheel

Claims (5)

[Claims] 1. A magnetic levitation type anti-vibration bed for a vehicle, wherein a bed main body is provided on a floor of a vehicle so as to be vertically movable in a horizontal posture via a link mechanism and is floated by a magnetic repulsive force. A stopper structure for preventing the bed body from moving out of an allowable range of vertical movement with respect to the floor is provided on either or both of the bottom surface of the bed body and the top surface of the floor. Stopper structure of the characteristic magnetic levitation type anti-vibration bed. 2. A magnetic levitation type anti-vibration bed for a vehicle, wherein a bed main body is provided on a floor of a vehicle so as to be vertically movable in a horizontal posture via a link mechanism, and is configured to levitate by a magnetic repulsive force. The upper stopper hangs down from the bed main body, and the lower stopper corresponding to the upper stopper is erected on the floor, and the bed main body is set to the upper limit of the allowable vertical movement range of the bed main body with respect to the floor. The mutual shapes of the upper stopper and the lower stopper are set so that the upper stopper and the lower stopper come into contact with each other when they are positioned, and the upper stopper or the lower stopper is positioned when the bed body is positioned at the lower limit of the above allowable range. The upper stopper or the lower stopper is dimensioned so that the front end surface of the stopper contacts the floor or bed body. A magnetic levitation type anti-vibration bed stopper structure. 3. A parallelogram link mechanism is used as the link mechanism, and the upper stopper and the lower stopper are formed in a columnar shape, and these stoppers have an upper limit of an allowable range of vertical movement of the bed body with respect to the floor. The stopper structure for a magnetic levitation type vibration damping bed according to claim 2, wherein the bed main body is positioned such that one side portion of each of the side portions stops when the bed main body is positioned. 4. The upper and lower stoppers are provided at their tip ends with upper and lower protrusions extending in directions opposite to each other, and the bed body is positioned at an upper limit of an allowable range of vertical movement of the bed body with respect to the floor. In this state, the upper and lower protrusions come into contact with each other,
3. The magnetic levitation type vibration damping bed according to claim 2, wherein the upper and lower projections are unlocked when the bed body is positioned lower than the upper limit height. Stopper structure. 5. A cushioning material is provided on portions of the upper stopper and the lower stopper that come into contact with each other, and tip surfaces of the upper stopper and the lower stopper that come into contact with the floor or bed body. Item 5. A magnetic levitation type vibration-proof bed stopper structure according to any one of items 2 to 4.