JP2839239B2 - Object support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel operation for selectively supporting a supported object such as office furniture between a movable state and a stopped state and supporting the object without any lever operation. It relates to a useful object support device.

[0002]

2. Description of the Related Art A device supporting a conference table or the like is known as one of such object supporting devices. This supporting device is provided with a lock mechanism on a moving support such as a caster or a slider, and is selectively provided in a movable state in which the rotating operation of the wheels of the caster and the sliding operation of the slider are permitted and a stopped state in which the operation is locked. To support the conference table as the supported object.

[0003] In another aspect, a supporting member such as an adjuster or the like and a moving supporting member such as the above-mentioned caster or slider are arranged in parallel, and one of them can be moved up and down with respect to the other by a switching mechanism. There is also known a movable state in which only the lower end of the caster is in contact with the ground, and a retractable position in which at least the lower end of the caster can be in contact with the floor at the same time as the lower end of the adjuster.

[0004]

However, since such a lock mechanism is provided on the caster or the slider itself, it must be bent and operated near the base of the conference table, which is a supported object, resulting in extremely operability. Is low. Further, when configuring the switching mechanism, it is necessary to configure the switching mechanism to interlock with an operation lever provided at an appropriate position. Since a complicated transmission mechanism is indispensable, there is a problem that the number of manufacturing steps and costs are increased.

In order to solve such a problem, if there is another switching mechanism for selectively switching between a used state and a non-used state, such as a flap mechanism attached to a folding table, for example, such a mechanism is required. There is also considered a device in which the switching operation is not required by operating the switching mechanism in conjunction with. However, in this way, when the top plate is held in use, the entire table is already fixed,
In order to move it, it is necessary to return the top plate to the non-use position again, so when many tables are to be arranged with the top plate surfaces facing each other, positioning work can not be performed while holding the top plate in use state, There is a disadvantage that work efficiency is extremely poor. In addition, the table must always be kept in use in order to fix the entire table when it is stored, so it is difficult to stably store the table in a non-use state with the table standing up and tightly polymerizing. It has become.

[0006]

In order to solve the above-mentioned problems, the present invention employs a completely new urging mechanism, and the urging mechanism allows the moving support to function effectively at the projecting position. When it is in the position, the moving support is held in that position by overcoming the gravity of the supported object, and a load greater than that is applied to move the moving support to the retreat position where the stopping support functions effectively. In this case, the moving support is held so that it cannot return to the projecting position by itself.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An object supporting apparatus according to the present invention selectively supports a supported object by switching to either a stopped state or a movable state.
A supporting member for supporting the supported object in a stopped state by contacting the supporting end with the supporting surface is provided, and the supporting end of the supported object has at least the supporting surface at the same time as the supporting end of the supporting member for stopping. A movable support that is operable between a retracted position where it can come into contact with the support member and a protruding position that protrudes beyond the support end of the restraining support in the direction of the support surface. Then, the moving support is urged by the urging mechanism in the support surface direction at a projecting position and in the vicinity thereof with a force greater than the gravity acting on the supported object at the protruding position and at the retracted position and in the vicinity thereof. It is configured to be urged toward the support surface with a smaller force than the acting gravity.

In such a configuration, when the moving support is operated to move the support end to the protruding position, this position is closer to the support surface than the support end of the restraining support. The support end of the support for abutment is in contact with the support surface, and the support end of the support for stopping is separated from the support surface and movably supports the supported object through the support for movement. In this position, the moving support is urged in the direction of the support surface by the urging mechanism, and the urging force is larger than the gravitational force acting on the supported object. Even if it receives a reaction force from the user, the operation of immersing in the retreat position direction is prohibited, and the movable state is stably maintained.

On the other hand, when an external force is artificially applied from this position to make the gravity acting on the supported object apparently larger than the force of the moving support urged toward the support surface by the urging mechanism, the moving Due to the reaction force from the support surface corresponding to the gravity, the support member causes a retracting operation in the retreat position direction against the urging force of the urging mechanism. When the support end of the moving support is moved to the retracted position by this immersion operation, the support end at this position abuts on the support surface at least simultaneously with the support end of the restraining support, or the support end of the restraining support. The support member is retracted to the side opposite to the support surface, so that the supporting state by the stopping support becomes dominant, and the supported object is supported in the stopped state. Moreover, at this position, the moving support is still urged toward the support surface by the urging mechanism, but the urging force at this position is different from the above, and is smaller than the gravity acting on the supported object. Therefore, even if the moving support can come into contact with the support surface by the biasing mechanism, it will not move to the protruding position by overcoming the reaction force from the support surface that matches the gravity, and the restrained state will be stable Maintain.

Further, an external force is artificially applied from this position to apply a reaction force from the support surface corresponding to the gravity acting on the supported object to the moving support in the direction of the support surface by the urging mechanism. If it is apparently smaller than that, the moving support causes a protruding operation by the urging force of the urging mechanism. When the supporting end of the moving support moves to the projecting position by this projecting operation, the urging force of the urging mechanism becomes larger than the gravity of the supported object again, so that the movable state is stably maintained.

Therefore, according to the present invention, it is possible to extremely easily switch from the movable state to the restricted state or from the restricted state to the movable state only by applying an external force to the supported object itself.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> In this embodiment, as shown in FIGS. 1 to 3, a folding table 1 serving as a supported object has a floor surface F serving as a support surface.
This is applied to the table supporting device 5 supported above.

The folding table 1 includes left and right main legs 2, a top plate 3, and a shelf plate 4. The top table 3 is supported near the upper ends of the left and right main legs 2 so as to be capable of flap operation. ing. The main leg 2 includes left and right bases 21 supported substantially horizontally with respect to the floor F by the table support device 5, left and right leg posts 22 protruding substantially at the center of the base 21, and left and right leg posts 22.
And a horizontal member 23 for rigidly connecting the members.

The top plate 3 is formed by fixing a frame to the lower surface of a substantially rectangular top plate main body. The top 3 is a standing non-use position 3A shown by imaginary lines in FIG. 2 and a horizontal use position 3B shown by solid lines in FIG. The left and right sides are supported by the vicinity of the upper end of the leg support 22 of the main leg 2 so that a flap operation can be performed. Further, the top plate 3 is locked at the non-use position 3A or the use position 3B by a not-shown top plate lock mechanism having a known configuration.
This lock is released by turning a top plate lock release lever 31 disposed on the side surface of the leg support 22 of the leg 2.

The shelf plate 4 is placed on the side of the main leg 2 so as to be able to flap between an upright non-use position 4A shown by an imaginary line in FIG. 2 and a horizontal use position 4B shown by a solid line in FIG. The left and right sides of the frame 23 are supported by the leg posts 22. The shelf plate 4 and the top plate 3 are connected by a connection link 41, and are configured to perform a flap operation in parallel. The table support device 5 to which the present invention is applied includes a front end 21 of a base 21.
a, and as shown in FIGS. 2 to 7,
The adjuster 6 includes an adjuster 6 serving as a support member for stopping, a caster 7 serving as a support member for movement, and an urging mechanism 80 for urging the caster 7, and is provided in one of a movable state shown in FIG. 2 and a stopped state shown in FIG. The folding table 1 is selectively switched to support the folding table 1.

The adjuster 6 is attached to the front end 21a of the base 21. The upper end 61a of the shaft 61 is fixed to the lower surface of the upper wall of the base 21, and the support end 6a provided at the lower end is fixed to the lower end. The height can be adjusted by appropriate means, and this support end 6a is brought into contact with the floor surface F as a support surface,
The folding table 1 is supported in a restrained state.
The caster 7 is formed by rotatably holding a wheel 71 by an axle holding portion 72. The caster 7 has a hole 70 a penetrating in the vertical direction in the axle holding portion 72, and the hole 70 a is formed in the shaft portion 61 of the adjuster 6. Is arranged at a position where it is fitted to the outside, and a guide portion 70 for guiding the caster 7 so as to be able to move toward and away from the floor surface F by the adjuster shaft portion 61 and the hole 70a is formed. Then, the caster 7 is moved along the adjuster shaft portion 61, and the retracted position A (see FIGS. 3 and 5) where the support end 7a can contact the floor surface F at least at the same time as the support end 6a of the adjuster 6, and the support end of the adjuster 6. Floor F than 6a
It is operable between a protruding position B (see FIGS. 2 and 5) that protrudes in the direction.

The biasing mechanism 80 includes a pair of link members 80A provided between the caster 7 and the base 21 and a pair of tension coil springs 80B serving as elastic members for biasing the link members 80A. It becomes. A pair of link members 80A has a pin 802 between its one ends 801.
And the other end 8 of the link member 80A is slidably engaged with both ends of the pin 802 in a substantially longitudinally extending elongated hole 210 provided in the side wall of the base 21.
03 on the axle holding portion 72 of the caster 7
04. The positional relationship between the pin 802 and the support shaft 804 and the separation distance are as follows.
When the support end 7a of the caster 7 is located at one end 210a of the adjuster 6, the support end 7a of the adjuster 6 is held at the same time as the support end 6a at the retreat position A where the support end 7a comes into contact with the floor surface F at least.
When the position 2 is located at the other end 210 b of the elongated hole 210, the support end 7 a of the caster 7 is held at a protruding position B which protrudes more toward the floor surface F than the support end 6 a of the adjuster 6.

The spring 80B has one end 805 connected to the pin 80.
2 and the other end 806 is connected to a spring hook portion 807 provided between the side walls of the base 21 in front of the pin 802. The pin 802 is connected to one end 2 of the long hole 210.
It is elastically biased from 10a toward the other end 210b.
The urging force is converted into an urging force for urging the caster 7 toward the projecting position B via the pin 802, the elongated hole 210, the link member 80A, and the guide portion 70, and the urging force is converted to the pin 802 and the support shaft 804. The larger the angle between the straight line connecting the spring line and the straight line that connects
It increases as it approaches the other end 210b of 0. The support mechanism 7 of the caster 7 is
When a is in the protruding position B and in the vicinity thereof, the caster 7 is urged in the direction of the floor F with a force greater than the gravity acting on the folding table 1 so that the support end 7a of the caster 7 is moved to the retracted position A.
Also, the elastic force of the spring 80B and the like are defined so as to urge the caster 7 in the direction of the floor surface F with a smaller force than the gravity acting on the folding table 1 when the caster 7 is in the vicinity thereof.

A caster 9 having a normal structure is attached to a position where the rear end 21b of the base 21 can be supported. The support end 9a of the caster 9 is set so as to horizontally support the base 21 when it is grounded on the floor F at the same time as the support end 6a of the adjuster 6. next,
The operation of this embodiment will be described. When the support end 7a of the caster 7 is at the protruding position B shown in FIG. 5, the support end 7a of the caster 7 protrudes to the floor surface F side from the support end 6a of the adjuster 6, so that the support end 7a of the caster 7 contacts the floor surface F. The support end 6a of the adjuster 6 is separated from the floor surface F, and movably supports the folding table 1 through the casters 7, 9 as shown in FIG. In this position, the caster 7 is urged in the direction of the floor F by the urging mechanism 80, and the urging force is larger than the gravitational force acting on the folding table 1, so that the caster 7 is moved to the floor F corresponding to the gravitational force. Even if it receives a reaction force from, the operation of the support end 7a to enter the retreat position A is prohibited, and the movable state is stably maintained.

On the other hand, from this position, a load is applied to the top plate 3 of the folding table 1 artificially by applying a hand in the direction indicated by the arrow U in FIG. When the caster 7 is apparently larger than the force urged in the direction of the surface F, the caster 7 moves in the retreat position A direction against the urging force of the urging mechanism 80 due to the reaction force from the floor surface F corresponding to the gravity. Cause. When the support end 7a of the caster 7 moves to the retracted position A shown in FIG. 3 by this immersion operation, the support end 7a at this position comes into contact with the floor surface F at least at the same time as the support end 6a of the adjuster 6, so that the adjuster 6 The supporting state becomes dominant, and the folding table 1 is supported in a stopped state. In addition, at this position, although the caster 7 is still urged in the direction of the floor F by the urging mechanism 80, the urging force at this position is different from the above, and is effectively converted to a force for projecting the caster 7. However, since it becomes smaller than the gravitational force acting on the folding table 1, even if the caster 7 can come into contact with the floor surface F by the urging mechanism 80, the caster 7 can overcome the reaction force from the floor surface F that matches the gravitational force. It does not move to the protruding position B, and its stopped state is stably maintained.

Further, from this position, the user manually raises the top plate 3 of the folding table 1 in the direction of the arrow V in the figure by, for example, putting his hand on the top plate 3 so that the folding table 1 is lifted from the floor F corresponding to the gravity acting on the folding table 1. The caster 7 applies the reaction force of
When the caster 7 is apparently smaller than the force biased in the direction, the caster 7 causes the projecting operation by the biasing force of the biasing mechanism 80. By this protruding operation, the support end 7a of the caster 7 is
Moves to the protruding position B shown in FIG.
Since the urging force of 0 is superior to the gravity of the folding table 1, the folding table 1 stably maintains the movable state.

As described above, the table support device 5 of the present embodiment can be moved from the movable state only by performing an operation of applying weight to the top plate 3 and the base 21 of the folding table 1. The state can be switched to the stopped state, and the operation can be switched from the stopped state to the movable state only by slightly lifting the top plate 3 and the like of the folding table 1. Therefore, the lever operation is not required at all, and the switching operation can be performed by a series of operations following the flap operation of the top plate 3, so that the usability is significantly improved as compared with the conventional lock mechanism or the like. be able to. Moreover, since the table supporting device 5 is mechanically constructed completely independently of the mechanism for flap-operating the top plate 3, the structure is significantly different from that of the conventional one in which the mechanisms are interlocked. This simplifies the process and leads to a reduction in the number of manufacturing steps and costs. In addition, in such a case, the table support device 5 can be made movable while the top plate 3 is held at the use position 3B, so that a large number of top plates 3 need to be arranged side by side. In this case, the positioning work can be performed while the top plate 3 is held at the use position 3B. Also, when the folding table 1 is stored, the top plate 3 can be locked even when it is raised to the non-use position 3A. Thus, an advantage that a stable storage state can be realized can be obtained. <Second Embodiment> FIGS. 8 to 13 show a case in which a caster 7 as a moving support is attached to a folding table 1 as a supported object via a rotating arm 73. In order to support the folding table 1 by switching it to a restrained state or a movable state via the adjuster 6, the rotating arm 73 is biased by a biasing mechanism 8 having a structure different from that of the above-described embodiment. In the following description, the same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

The adjuster 6 is provided at the front end 21 of the base 21.
The position of the support end 6a provided at the lower end can be adjusted through the operation of the nut portion 62 provided at the intermediate portion, and the support end 6a is brought into contact with the floor surface F serving as a support surface. Thus, the folding table 1 is supported in a stopped state. The turning arm 73 has a base end 73b pivotally connected to a vicinity of the front end 21a of the base 21 via a horizontal shaft 73a, and the axle holding portion 72 of the caster 7 is connected to the turning end 7 of the turning arm 73.
3c is supported via a support shaft 74 so as to be able to turn horizontally. With the pivoting operation of the pivot arm 73, the retractable position A (see FIGS. 10 and 12) where the support end 7a can contact the floor surface F at least simultaneously with the support end 6a of the adjuster 6 and the support of the adjuster 6 It is operable between a protruding position B (see FIGS. 9 and 12) that protrudes from the end 6a in the direction of the floor surface F. In order to bias the rotation arm 73, a relatively weak torsion coil spring 7 is attached to the horizontal shaft 73a.
5 is provided, one end of which is engaged with the upper edge of the rotating arm 73 and the other end is engaged with the upper wall of the base 21 to urge the rotating arm 73 in the direction in which the casters 7 protrude. ing.
Note that a stopper 21c is provided on the bottom wall of the base 21 to prohibit the rotation arm 73 from rotating beyond the operation area in the protruding direction.

The urging mechanism 8 has a first cam surface 81 and a second cam surface 82 formed on the upper edge of the rotating arm 73, and a pair of cam surfaces 81, 82 provided at positions where they can be in contact with the cam surfaces 81, 82. It comprises an urging arm 83 and a torsion coil spring 84 as an elastic body for urging the urging arm 83. The biasing arm 83 has a base end 83 via a horizontal shaft 83a provided on the front end side of the horizontal shaft 73a of the rotation arm 73.
b is pivotally mounted, and a column-shaped rotating portion 83c is attached between the rotating ends extending rearward and downward. The rotating portion 83c is disposed at a position where the rotating portion 83c is engaged with the cam surfaces 81 and 82 on the upper edge of the arm 73. Specifically, when the support end 7a of the caster 7 is at or near the protruding position B shown in FIGS.
3c is formed at a position where the upper edge of the rotating arm 73 is slightly inclined so as to be able to contact the second cam surface 82.
When the caster 7 is in the retracted position A shown in FIGS. 10 and 12 and in the vicinity thereof, the upper edge of the rotating arm 73 is recessed in a substantially U-shape so that the rotating portion 83c can be attached. Formed at the position. The boundary between the first cam surface 81 and the second cam surface 82 is continuous. In such a configuration, when the caster 7 moves toward the protruding position B, the rotating portion 8
3c, a straight line connecting the contact point with the first cam surface 81 and the horizontal axis 83a gradually approaches a right angle to the first cam surface 81, and the spring force of the torsion coil spring 84 is toggled to the rotating arm 73. When the caster 7 moves from the projecting position B to the retracted position A, the caster 7 is set to urge the caster 7 in the projecting direction with a force larger than the gravity applied to the folding table 1. Is the first cam surface 8
At the stage where the transition from 1 to the second cam surface 82 is made, the angle between the straight line and the cam surfaces 81 and 82 is sharply changed, and most of the spring force of the torsion coil spring 84 is changed by the strength of the member in the longitudinal direction of the rotating arm 73. Counteract, substantially pivot arm 73
Is set so that the biasing force acting on the caster 7 in the protruding direction via the folding table 1 is smaller than the gravity acting on the folding table 1.

A caster 9 having an ordinary structure is attached to a position where the rear end 21b of the base 21 can be supported. The support end 9a of the caster 9 is set so as to horizontally support the base 21 when it is grounded on the floor F at the same time as the support end 6a of the adjuster 6. next,
The operation of this embodiment will be described. When the support end 7a of the caster 7 is at the protruding position B shown in FIG. 12, the support end 7a of the caster 7 protrudes toward the floor surface F from the support end 6a of the adjuster 6, so that the support end 7a of the caster 7 contacts the floor surface F. The support end 6a of the adjuster 6 is separated from the floor surface F, and movably supports the folding table 1 through the casters 7, 9 in a slightly inclined state as shown in FIG. In this position, the casters 7 are urged in the direction of the floor F by the urging mechanism 8, and the urging force is greater than the gravitational force acting on the folding table 1. Even if it receives a reaction force from, the operation of the support end 7a to enter the retreat position A is prohibited, and the movable state is stably maintained.

On the other hand, from this position, the load is applied by manually touching the top plate 3 of the folding table 1 and the gravity is urged in the direction of the floor F by the urging mechanism 8. When the caster 7 is apparently larger than the force, the caster 7 causes the immersion operation in the retreat position A direction shown in FIG. 10 against the urging force of the urging mechanism 8 due to the reaction force from the floor surface F corresponding to the gravity. . By this immersion operation, the support end 7 of the caster 7 is
When a moves to the retreat position A, the support end 7a at this position abuts on the floor F at least simultaneously with the support end 6a of the adjuster 6, so that the support state of the adjuster 6 becomes dominant and the folding table 1 is stopped. Support in the state. Moreover, in this position, the casters 7 are still in the biasing mechanism 8
Although it is urged in the direction of the floor F by this, the urging force at this position is different from the above, and the folding table 1
Is smaller than the gravitational force acting on the floor surface F even if the caster 7 can contact the floor surface F by the urging mechanism 8, and further moves to the protruding position B by overcoming the reaction force from the floor surface F corresponding to the gravity. And keep the restrained state stable.

Further, from this position, by manually raising the top plate 3 of the folding table 1 with a hand, the reaction force from the floor F corresponding to the gravity acting on the folding table 1 is caster 7. Is apparently smaller than the force urged in the direction of the floor F by the urging mechanism 8, the caster 7 causes the projecting operation by the urging force of the urging mechanism 8. When the supporting end 7a of the caster 7 moves to the protruding position B by this protruding operation, the urging force of the urging mechanism 8 exceeds the gravity of the folding table 1 again, so that the folding table 1 can stably move. maintain.

As described above, the table support device 5 of the present embodiment can be moved from the movable state only by performing an operation of applying weight to the top plate 3 and the base 21 of the folding table 1. The state can be switched to the stopped state, and the operation can be switched from the stopped state to the movable state only by slightly lifting the top plate 3 and the like of the folding table 1. Therefore, the lever operation is not required at all like the above-described embodiment, and the usability can be remarkably improved as compared with the conventional lock mechanism or the like. In addition, since the table support device 5 is configured completely independently of the mechanism for performing the flap operation of the top plate 3, the structure is significantly simplified as compared with the conventional one in which the mechanisms are interlocked, and the manufacturing is simplified. This will also lead to reductions in man-hours and costs. In addition, in such a case, the table support device 5 can be made movable while the top plate 3 is held at the use position 3B, so that a large number of top plates 3 need to be arranged side by side. In this case, the positioning work can be performed while the top plate 3 is held in the use position 3B, and the folding table 1 can be locked even when the top plate 3 is set up when the folding table 1 is stored. Can be achieved. <Third Embodiment> FIG. 14 shows a case where a caster 7 serving as a moving support is attached to a folding table 1 which is a supported object via a lifting rod 107.
In order to support the folding table 1 by switching it to a restrained state or a movable state via the caster 7 and the caster 7, an urging mechanism 108 different from that of the above embodiment is employed.

The lifting rod 107 is guided and held so as to move up and down on a fixed straight line with respect to the base 21. The urging mechanism 108 includes a column-shaped cam body 181 attached to the upper end of the elevating rod 107 with its axis centered in the horizontal direction,
The urging member 18 pivotally attached to the base 21 of the folding table 1 by the support shaft 182b so that the tip portion 182a enters the moving path of the cam body 181 when the 07 moves up and down.
2, a spring 183 as an elastic body for urging the urging member 182 clockwise in the figure, and a stopper 184 for regulating the rotation range of the urging member 182.

That is, the biasing member 182 partially has a sheath 182c for accommodating the distal end 182a, and the sheath 182c pivots the base end of the distal end 182a around a support shaft 183d. It is a knife-shaped one that is worn and housed. The tip 182a is resiliently contacted with the back wall of the sheath 182c by a spring 182e in a state where no external force is applied. In this position, the tip of the tip 182a is positioned on the moving path of the cam body 181 described above. ing.

When the supporting end 7a of the caster 7 is located at the protruding position B closer to the floor F than the supporting end 6a of the adjuster 6 and near the same, the front end 182a of the biasing member 182 causes the cam body 181 to move downward. In this position, the spring 183 biases the caster 7 in the direction of the floor F via the distal end portion 182a of the biasing member 182 and the cam body 181 at this position. Is set to be larger than the gravity acting on the folding table 1. Further, when the support end 7a of the caster 7 is at least at the retreat position A where the support end 7a of the caster 7 comes into contact with the floor surface F at the same time as the support end 6a of the adjuster 6, the biasing member 1
82, the caster 7 is held at a position where it is not biased.
Direction, that is, the caster 7 and the lifting rod 107
, Or the sum of the forces applied by an appropriate spring (not shown) is set to be smaller than the gravity acting on the folding table 1. further,
When the support end 7a moves from the retreat position A to the projecting position B due to its own weight or the like without the influence of the gravity acting on the folding table 1, the cam body 181 causes the biasing member 182 to move. 182a, the spring 182e is relatively weak, and the
a is temporarily retracted to a position where it does not interfere with the cam body 181 to allow the cam body 181 to pass therethrough.

Even in such a configuration, when the support end 7a of the caster 7 is at the protruding position B, the urging member 182 overcomes the reaction force from the floor F to stably move the folding table 1 to a movable state. When an artificial load is applied in the direction in which the reaction force increases from this position,
When the cam body 181 moves upward while rotating the entire urging member 182 counterclockwise around the support shaft 182b against the spring 183, and the movement of the support end 7a of the caster 7 to the retreat position A is permitted. Becomes After the cam 181 passes, the entire urging member 182 is urged by the spring 183 and returns to the position where it is locked by the stopper 184 again. At this position, no strong external force acts on the casters 7 to overcome the reaction force from the floor F, so that the casters 7 do not cause the projecting operation, and the folding table 1 stably maintains its stopped state. I do. Further, when the folding table 1 is lifted at this position to reduce the reaction force from the floor surface F, the weight of the caster 7 causes the leading end 182 to move.
The support end 7a is moved to the protruding position B again while pushing a.

Therefore, even with such a structure,
The folding table 1 can be selectively switched between the restrained state and the movable state without performing any lever operation in the same manner as in the above-described embodiment. Can be dramatically improved as compared with. <Fourth Embodiment> FIG. 15 shows a case where a caster 7 serving as a moving support is mounted on a folding table 1 serving as a supported object and a swing frame 2 is provided.
In order to support the folding table 1 by switching to a restrained state or a movable state via the swing frame 207 and the casters 7,
An urging mechanism 208 different from that of the above embodiment is employed.

The swing frame 207 has a long hole 271a extending in the longitudinal direction near the upper end.
The engaging portion 71a is engaged with a fixed shaft 271b provided horizontally on the base 21 of the folding table 1 to form an engaging portion 271. The engaging portion 271 allows the base 21 to move between a standing position and a tilting position. It is mounted so that it can swing. Biasing mechanism 20
8 is a shaft 282a at a position where the caster 7 can be in contact with the biasing surface 281 when the caster 7 is at or near the protruding position B.
And a biasing slider 282 slidably disposed through the elongated hole 282b, a spring 283 as an elastic body for biasing the biasing slider 282, and the swing frame 20.
7 and a spring 284 for applying a force in a direction opposite to the tilting direction. When the support end 7a of the caster 7 is at or near the protruding position B where the support end 6a of the adjuster 6 protrudes in the direction of the floor surface F, the urging slider 282 moves the urging surface 281 of the swing frame 207. Is set so that the force for urging the caster 7 in the direction of the floor surface F through the above is greater than the gravitational force acting on the folding table 1, and the support end 7 a of the caster 7 is at least the support end 6 a of the adjuster 6.
At the same time, when the swing frame 207 is in the retracted position A in contact with the floor F and in the vicinity thereof, the swing frame 207 is tilted and
Moves to a position where it cannot be biased by the biasing slider 282, and the force of biasing the caster 7 in the direction of the floor F by its own weight and the spring 284 is smaller than the gravity acting on the folding table 1. Is set to Further, when the caster 7 performs the operation from the retreat position B to the protruding position A without being affected by the gravity acting on the folding table 1, the force of the spring 284 works effectively, and the swing frame 207 is attached. The swing frame 207 can be rotated to a standing position where the biasing surface 281 can be biased by the biasing slider 282. Note that the biasing surface 281 of the swing frame 207 is slightly inclined, and when an external force that increases the reaction force from the floor F is applied, the swing frame 20
7, a tilting operation about the shaft 271b as a fulcrum is caused. 285 and 286 are swing frames 20
7 is a stopper that regulates the swing range of 7.

Even in such a configuration, when the support end 7a of the caster 7 is at the protruding position B, the biasing slider 2
82 stably holds the folding table 1 in a movable state by overcoming the reaction force from the floor F. When an artificial load is applied from this position in the direction in which the reaction force increases, the swing The biasing surface 281 of the moving frame 207 has a spring 283
While the swinging frame 207 is tilted by the guide action of the urging surface 281, and at the same time, the swinging frame 207 moves while the shaft 271 b moves relatively to the lower end with respect to the elongated hole 271 a. Displaced in the longitudinal direction,
This allows the support end 7a of the caster 7 to move to the retracted position A. At this position, the main force for projecting the caster 7 is only the spring 284, but since the urging force is not strong enough to overcome the reaction force from the floor F, the caster 7 performs the projecting operation. Will not cause
The folding table 1 stably maintains its stopped state. Further, when the folding table 1 is lifted at this position to reduce the reaction force from the floor surface F, the weight of the caster 7 and the action of the spring 284 cause the swing frame 20 to move.
7 again moves the support end 7a to the protruding position B while gradually pushing the urging slider 282 again.

Therefore, even with such a structure,
The folding table 1 can be selectively switched between the restrained state and the movable state without performing any lever operation at all in the same manner as in each of the above-described embodiments. It can be dramatically improved as compared with the related art. <Fifth Embodiment> FIG. 16 shows a caster 7 serving as a moving support, with one end 371a and 372a pivotally connected to each other at a pivot point 373 and the other end 371b and 372b provided on the base 21 of the folding table 1. A pair of link members 37, each of which is slidably supported by the elongated holes 21f and is configured to be able to move the pivot point 373 toward and away from the floor surface F.
1, 372 via the pivot point 373. Further, an urging mechanism 308 different from that of the above-described embodiment is employed in order to support the folding table 1 by switching to a restrained state or a movable state via these link members 371 and 372 and the casters 7.

The urging mechanism 308 includes a first spring 381 as a first elastic body for urging the pivot point 373 in the direction of the floor F,
A second elastic body, which is a second elastic body, biases both link members 371 and 372 in a direction in which the intersection angle at the pivot point 373 increases.
And a spring 382. When the support end 7a of the caster 7 is at or near the protruding position B protruding from the support end 6a of the adjuster 6 toward the floor surface F,
The sum of the urging forces of the second springs 371 and 372 is set so that the force for urging the caster 7 in the direction of the floor F is greater than the gravitational force acting on the folding table 1, and the support end 7a of the caster 7 is At least the support end 6a of the adjuster 6
At the same time, when the caster 7 is at the retracted position A in contact with the floor surface F and at the vicinity thereof, the caster 7 is moved to the floor surface F by the remaining urging force obtained by subtracting the urging force of the second spring 382 from the urging force of the first spring 381.
The force urging in the direction is set to be smaller than the gravity acting on the folding table 1.

Even in such a configuration, when the support end 7a of the caster 7 is at the projecting position B, the first and second springs 3
81 and 382 can overcome the reaction force from the floor F and stably hold the folding table 1 in a movable state.
When an artificial load is applied from this position in the direction in which the reaction force increases, the pivot point 373 is lifted against the urging force of the springs 381, 382, and both link members 371, 3
The operation in which the support end 7a of the caster 7 reaches the retreat position A through the thought point where 72 is aligned is allowed. In this position, since the second spring 382 acts in a direction to reduce the urging force of the first spring 381, even if the remaining urging force of the first spring 381 acts on the caster 7 in the protruding direction, the second spring 382 exerts its force. Since the force is not a strong force that overcomes the reaction force, the caster 7 does not cause the projecting operation, and the folding table 1 stably maintains its stopped state. Further, when the folding table 1 is lifted at this position to reduce the reaction force from the floor surface F, the link members 371 and 372 are moved by the weight of the caster 7 and the biasing force remaining on the spring 381. The caster 7 is moved to the projecting position B again after passing through the point.

Therefore, even with such a structure,
The folding table 1 can be selectively switched between the restrained state and the movable state without performing any lever operation at all in the same manner as in each of the above-described embodiments. It can be dramatically improved as compared with the related art. <Sixth Embodiment> A table support device 1005 shown in FIGS. 17 to 25 supports a folding table 1 having the same structure as that of each of the above embodiments. The same reference numerals are given and the description is omitted.

This table support device 1005 is similar to that shown in FIG.
As shown in FIG. 7, the cartridge has a cartridge structure incorporated in a channel member 1000 having a downward U-shape as a whole, and an adjuster 6 serving as a support member for stopping, a caster 7 serving as a support member for movement, and a caster 7. Urging mechanism 100 for urging
20 and 21, and is fixed by mounting the channel member 1000 near the front end 21a of the base 21 along the longitudinal direction as shown in FIGS. Then, the folding table 1 is selectively switched between the movable state shown in FIGS. 18, 20, 21 and 23 and the restrained state shown in FIGS. 19, 21 and 22, and is supported. ing.

In the adjuster 6, the upper end 61a of the shaft portion 61 is fixed to the lower surface of the upper wall of the channel member 1000, and the support end 6a provided at the lower end is adjustable in height by appropriate means. 6a is brought into contact with the floor surface F, which is a support surface, to support the folding table 1 in a stopped state. The casters 7 connect the wheels 71 to the axle holding portions 72.
The axle holding portion 7
2, a hole 70a penetrating in the vertical direction is formed.
a is disposed at a position where the shaft portion 61 of the adjuster 6 is fitted to the outside, and a guide portion 70 for guiding the caster 7 to be able to move toward and away from the floor surface F by the adjuster shaft portion 61 and the hole 70a is formed. ing. And the adjuster shaft 61
The retractable position A (see FIGS. 19 and 21) where the support end 7a can contact at least the support end 6a of the adjuster 6 at the same time as the support end 6a of the adjuster 6 and the floor surface F The protruding and retracting operation can be performed between a protruding position B (see FIGS. 18 and 21) protruding in the direction.

The biasing mechanism 1008 includes a pair of link members 1080 disposed between the casters 7 and the base 21.
A first compression coil spring 1010 which is an elastic body for urging one end 1081 of these link members 1080 in a direction in which the caster 7 approaches the floor surface F, and a first compression coil spring 1010 of the caster 7 in a direction in which the caster 7 approaches the floor surface F. A second compression coil spring 1020 is provided as an auxiliary elastic body for urging the upper end 72a of the axle holding portion 72. The second compression coil spring 1020 constitutes an urging means of the present invention for urging the caster 7 in the direction of the floor F along the guide portion 70 together with the gravity acting on the caster 7.

One end 1081 of the pair of link members 1080 is connected to each other via a pin 1082, and the other end 1083 is connected to the axle holder 72 of the caster 7.
Is pivotally connected via a support shaft 1084 in the vicinity of the upper part of the camera. A kick spring (not shown) is built in between the support shaft 1084 and the axle holding portion 72, and a downward guide surface 1030 is formed on the lower surface of the upper wall of the channel member 1000. Member 1
One end 1081 of the 080 is pressed against the downward guide surface 1030 via the pin 1082. The stopper 1031 hangs down from the tip of the downward guide surface 1030, and the pin 1082 is slidable along the downward guide surface 1030 to a position where it comes into contact with the stopper 1031. Is set so that the support end 7a of the caster 7 is held at the protruding position B closer to the floor surface F than the support end 6a of the adjuster 6 at or near the contact position of the pin 1082 with the stopper 1031. . Also, one end 1081 of the link member 1080
Is a free end, and basically does not restrict the moving range of the caster 7.
At least simultaneously with the support end 6a of the adjuster 6 and the floor surface F.
Can be immersed in the evacuation position A which can be brought into contact with the vehicle. When the caster 7 moves from the protruding position B to the immersing position A and the pin 1082 slides along the downward guide surface 1030 in the direction indicated by the arrow in FIG. 21, the pin 1082 is gradually guided downward. 1030
a is provided on a part of the downward guide surface 1030.

The first compression coil spring 1010 is housed in a case 1011 fixed in the channel member 1000. Specifically, this case 1011 corresponds to FIG.
As shown in FIG. 7, the front wall 1 is formed integrally with the stopper 1031 and the downward guide surface 1030 by resin.
011a, a rear wall 1011b, and a side wall 1011c have a spring accommodating portion 1011d at a position surrounded by the first compression coil spring 1010a.
Are arranged to be able to expand and contract along the longitudinal direction of the base 21. 20, 24 and 25 are provided between the front end of the first compression coil spring 1010 and the front wall 1011a.
As shown in FIG. 7, an operating body 1012 having a U-shape in plan view is provided, and a pressing rod 1013 protruding from the center of the operating body 1012 is attached to a front wall 1011 of a case 1011.
a one end 1081 of the link member 1080
It is in elastic contact with a pin 1082 that connects between them.

The second compression coil spring 1020 is wound around the shaft portion 61 of the adjuster 6, the upper end of which is in contact with the lower surface of the upper wall of the channel member 1000, and the lower end of which is the upper end of the axle holding portion 72 of the caster 7. The caster 7 is elastically urged downward.
Thus, in this embodiment, the support end 7 of the caster 7
When “a” is at the protruding position B and its vicinity, the casters 7 mainly move from the first compression coil spring 1010 to the pressing rod 1013, the pin 1082, and the link member 108.
0, and the caster 7 is urged in the direction of the floor F by the elastic urging force transmitted to the caster 7 through the first compression coil spring 10 and the elastic urging force acting directly on the caster 7 from the second compression coil spring 1020. However, in this embodiment, the sum of the urging forces is set to be larger than the gravity acting on the folding table 1. Also, the support end 7a of the caster 7
Is in the retracted position A and its vicinity, the inclined surface 10
The pin 1082 is released from the elastic biasing force of the first compression coil spring 1010 by guiding the pin 1082 below the pressing rod 1013 along the 30a, and the elastic biasing force directly acting mainly from the second compression coil spring 1020 Accordingly, the casters 7 are urged in the direction of the floor surface F. The urging force is set to be smaller than the gravity acting on the folding table 1. The relative force relationship between the elastic urging force and the load applied to the folding table 1 is basically the first compression coil spring 10.
This can be realized by setting the spring force of the second compression coil spring 1020 relatively small and setting the spring force of the second compression coil spring 1020 relatively small. Of course, the reaction force from the kick spring actually functions as an urging force for projecting the caster 7, and it goes without saying that the above setting is made in consideration of various other force relationships.

In this embodiment, the case 101
1, the operating body 1012 formed by advancing the operating body 1012 toward the caster 7 and the rear wall 10
11 and FIG. 25 in the gap S (see FIG. 25) with respect to FIG.
The stopper 1040 shown in FIG. 7 is configured to be detachable, and the stopper 1040 inhibits the retreating operation of the operating body 1012, so that the caster 7 can be fixed at the projecting position B. Also in this embodiment, as shown in FIGS. 18 and 19, a caster 9 having a normal structure is provided at a position where the rear end 21b of the base 21 can be supported.
Is attached. The support end 9a of the caster 9 is set so as to horizontally support the base 21 when it is grounded on the floor F at the same time as the support end 6a of the adjuster 6.

Next, the operation of this embodiment will be described. When the support end 7a of the caster 7 is at the protruding position B shown in FIG. 21, the support end 7a of the caster 7 projects more toward the floor surface F than the support end 6a of the adjuster 6, so that the caster 7
The support end 7a of the adjuster 6 is in contact with the floor surface F, and the support end 6a of the adjuster 6 is separated from the floor surface F and can be moved with the folding table 1 slightly inclined backward through the casters 7, 9 as shown in FIG. To support. In this position, the caster 7 is urged in the direction of the floor F by the urging mechanism 1008,
Since the biasing force is greater than the gravitational force acting on the folding table 1, even when the caster 7 receives a reaction force from the floor surface F corresponding to the gravitational force, the operation of the support end 7a to enter the retreat position A is prohibited. And the movable state is stably maintained.

On the other hand, from this position, a load in the direction of arrow U in the figure is applied by manually touching the top plate 3 of the folding table 1 or the like, and the gravitational force is applied by the caster 7 to the floor by the urging mechanism 1008. When the caster 7 is apparently greater than the force urged in the direction of the surface F, the caster 7 is retreated to the retracted position A against the urging force of the urging mechanism 1008 due to the reaction force from the floor F corresponding to the gravity.
The immersion operation is caused in the direction, and the link member 1 is accordingly caused.
The pin 1082 connecting one end 1081 of the 080 moves in the direction of the arrow in FIG. 21, and the first and second compression coil springs 1010 and 1020 are compressed by the pin 1082 or the upper end 72 a of the axle holder 72. On this occasion,
The pressing rod 1013 that transmits the elastic force of the first compression coil spring 1010 comes off from the pin 1082 shortly before the end of operation, and the pin 1082 is located below the pressing rod 1013, and the pressing rod 1013 extends to its original length. At this time, the operating body 1012 is brought into contact with a backing plate 1012a provided in the case 1011 to thereby make the pressing rod 101
3 is stopped at the protruding position. When the support end 7a of the caster 7 moves to the retreat position A shown in FIG. 21 by such a immersion operation, the support end 7a at this position contacts the floor surface F at least simultaneously with the support end 6a of the adjuster 6, so that the adjuster 6 is dominant, and the folding table 1 is supported in a stopped state as shown in FIG. Moreover, at this position, the caster 7 is still urged in the direction of the floor F by the urging mechanism 1008, but the urging force at this position is smaller than the gravity acting on the folding table 1 as described above. Therefore, even if the caster 7 can come into contact with the floor F by the urging mechanism 1008, the caster 7 does not move to the projecting position B by overcoming the reaction force from the floor F that matches the gravitational force. Maintain a stable state.

Further, from this position, the user manually raises the top plate 3 of the folding table 1 in the direction indicated by the arrow V in FIG. When the reaction force of the caster 7 is apparently smaller than the force of the caster 7 being biased in the direction of the floor F by the biasing mechanism 1008,
The caster 7 causes a projecting operation by the urging force of the urging mechanism 1008, and accordingly, the pin 1082 moves in the direction opposite to the direction of the arrow in FIG. This pin 108
The trajectory 2 is different from that when the caster 7 is immersed, and after sliding on the lower surface of the pressing rod 1013, finally the pressing rod 101
3 will fall to the front end side. When the support end 7a of the caster 7 moves to the protruding position B by this protruding operation, the urging force of the urging mechanism 1008 exceeds the gravity of the folding table 1 again, so that the folding table 1 can stably move in a movable state. maintain.

As described above, the table supporting device 1005 of the present embodiment is similar to the above-described embodiments, and the folding table 1
It is possible to switch from the movable state to the stopped state by merely performing an operation of applying weight to the top plate 3 or the base 21 of the folding table 1, and to lift the top plate 3 of the folding table 1 slightly. It is possible to switch from the suspension state to the movable state only by performing an operation. Therefore, the lever operation is not required at all, and the switching operation is not required.
Can be performed by a series of operations following the flap operation, and the usability can be remarkably improved as compared with a conventional lock mechanism or the like. In addition, since the table supporting device 1005 is mechanically configured completely independently of the mechanism for flap-operating the top plate 3, the structure is significantly different from that of the conventional one in which the mechanisms are interlocked. This simplifies the process and leads to a reduction in the number of manufacturing steps and costs.
In addition, in such a case, the top plate 3 is moved to the use position 3
B, the table support device 1005 can be made movable so that a large number of top plates 3 need to be aligned with each other. It can be carried out, and even when the folding table 1 is stored, it can be locked even when the top plate 3 is raised in the non-use position 3A, so that a compact and stable storage state can be realized. Becomes

In particular, in this embodiment, the urging mechanism 10
08 is composed of two compression coil springs 1010 and 1020, and the biasing force when the caster 7 is at the protruding position B is mainly a first compression coil spring 101 having a strong spring force.
0, and the biasing force when the caster 7 is in the retracted position is mainly delegated to the second compression coil spring 1020 having a weak spring force, so that the setting in configuring the above function is extremely easy, Also those springs 101
Since 0 and 1020 can be used in an appropriate posture, accurate operation and long-term reliability can be secured.

Further, in this embodiment, when the caster 7 is immersed, the pin 1082 is moved to the pressing rod 10 when the one end 1081 of the link member 1080 is moved to some extent.
13 and the operating body 1012 is brought into contact with the abutment plate 1012a to return to the original position. Therefore, when an operation of pressing down on the top plate 3 is performed, the detachment of the pin 1082 is performed. The immersion can be clearly felt by the touch of the hand together with the sound and the contact sound of the operating body 1012. Conversely, when the top plate 3 is lifted when the caster 7 is protruded, the pin 1082 is pushed by the pressing rod 1013.
This is clearly noticed by the mounting sound at the time of falling into the front end of the camera, so that an accurate operation can be performed with a good operational feeling.

Further, if necessary, the caster 7 can be locked at that position by inserting the stopper 1040 when the caster 7 is at the protruding position B. It is possible to effectively improve operability and safety when performing the operation. Furthermore, in this embodiment, the table support device 1
Since the adjuster 6, the caster 7, and the urging mechanism 1008 constituting the 005 are integrally incorporated into the channel member 1000 to form a cartridge, the entire configuration of the table support device 1005 can be made compact, and Can be effectively improved,
Furthermore, even if there is any adjustment, failure, or the like, it can be easily removed.

The specific configuration of each section is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the sixth
In the embodiment, the casters 7 are moved along the guide portions 70 to the floor surface F.
The urging means for urging in the direction is constituted by using the second compression coil spring 1020 as an auxiliary elastic body in addition to the gravity acting on the caster 7 itself, but depending on the design, this second compression coil spring 1020 is used.
It is also possible to eliminate the need for the compression coil spring 1020 and operate the same operation as in the above embodiment only by gravity. Further, in the above embodiment, the rear end 21 of the base 21 is used.
A caster 9 having a normal structure was attached to the b side,
Of course, the base rear end 21b may be supported by the table support device 1005 according to the present invention, similarly to the front end 21a.

[0055]

The present invention is embodied in the form described above and has the following effects. That is, the object support device of the present invention holds the position by urging the moving support by overcoming the gravitational force of the supported object through the urging mechanism when the moving support is at the protruding position at which the moving support effectively functions. When the moving support is moved to the retreat position where the restraining support effectively functions by applying a load exceeding that, the urging force by the urging mechanism is reduced and the moving support is moved by itself. It is impossible to return to the protruding position.

Therefore, troublesome lever operation is not required at all when switching the supported object between the restrained state and the movable state, and the usability can be remarkably improved as compared with the conventional case. In addition, since the object support device is configured independently of itself, the structure is much simpler than that of a conventional mechanism that functions in conjunction with, for example, a top plate capable of flap operation. When it is necessary to align the top plates of a large number of tables, for example, it is possible to perform positioning work while holding the top plate in the use position, and then apply weight to lock the table. When storing or storing the whole unit, it is possible to operate or handle objects such as a folding table, etc. It is possible to dramatically improve compared to the related art.

[Brief description of the drawings]

FIG. 1 is a front view of a folding table to which a first embodiment of the present invention is applied.

FIG. 2 is a side view of the folding table in a movable state.

FIG. 3 is a side view of the folding table in a stopped state.

FIG. 4 is a partially omitted perspective view showing the table support device of the embodiment.

FIG. 5 is a side view with the same part broken.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII in FIG. 5;

FIG. 8 is a front view of a folding table to which the second embodiment of the present invention is applied.

FIG. 9 is a side view of the folding table in a movable state.

FIG. 10 is a side view of the folding table in a stopped state.

FIG. 11 is a partially omitted perspective view showing the table support device of the embodiment.

FIG. 12 is a side view with the same part broken.

FIG. 13 is a front sectional view of the same.

FIG. 14 is a partially broken side view showing a third embodiment of the present invention.

FIG. 15 is a partially broken side view showing a fourth embodiment of the present invention.

FIG. 16 is a partially cutaway side view showing a fifth embodiment of the present invention.

FIG. 17 is a front view of a folding table to which a sixth embodiment of the present invention has been applied.

FIG. 18 is a side view of the folding table in a movable state.

FIG. 19 is a side view of the folding table in a stopped state.

FIG. 20 is a partially-omitted perspective view showing the table support device of the embodiment.

FIG. 21 is a side view with the same part broken.

FIG. 22 is an enlarged front view of the main part.

FIG. 23 is an enlarged front view of the essential parts showing the operation of the embodiment.

FIG. 24 is an exploded perspective view of a main part of the embodiment.

FIG. 25 is a perspective view showing a main part of the embodiment.

[Explanation of symbols]

 A: Evacuation position B: Projection position F: Support surface (floor surface) 1: Supported object (folding table) 5: Object support device (table support device) 6: Stopping support (adjuster) 6a: Support end 7 ··· Moving support (caster) 7a ··· Support end 8 ··· Urging mechanism 70 ··· Guide part 73 ··· Rotating arm 80 ··· Urging mechanism 80A ··· Link member 80B ··· Elastic body (tension coil spring) 81 ··· First cam surface 82 ··· Second cam surface 83 ··· urging arm 83c ··· rotating part 84 ··· elastic body (torsion coil spring) 107 ··· lifting rod 108 · urging mechanism 181 · · cam body 182 · urging member 182a · tip section 183 · · Spring 207 oscillating frame 208 urging mechanism 281 urging surface 282 urging slider 283 elastic body (spring) 308 urging mechanism 371, 372 link member 371a, 3 2a ... One end 371b, 372b ... Other end 373 ... Pivot point 381 ... First elastic body (first spring) 382 ... Second elastic body (second spring) 1005 ... Table support device 1008 ... Biasing mechanism 1010 ... Elastic body (First compression coil spring) 1020: auxiliary elastic body (second compression coil spring) 1030: downward guide surface 1030a: inclined surface 1080: link member 1081 ... one end 1082 ... other end

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) A47B 91/00 A47B 3/08 B60B 33/00 B60B 33/06

Claims (14)

(57) [Claims] An object support device for selectively switching and supporting a supported object between a restrained state and a movable state, wherein the supporting end provided on the supported object is brought into contact with a supporting surface. A supporting member for supporting the object to be supported in a stopped state, and a supporting member supported from the supported object from a retreat position where its supporting end can contact at least the supporting end of the supporting member at the same time as the supporting surface. A transfer support operable up to a protruding position protruding in the support surface direction from the support end of the body,
The moving support is urged toward the support surface with a force greater than the gravity acting on the supported object at and near the projecting position, and a force smaller than the gravity acting on the supported object at the retracted position and near the retracted position. And an urging mechanism for urging in the direction of the support surface. 2. A moving support is engaged with an object to be supported via a guide portion, and the guide portion guides the moving support toward and away from a support surface, and a biasing mechanism. A link member rotatably and slidably supported at one end to the supported object and pivotally connected at the other end to the moving support so as to hold the moving support movably between the projecting position and the retracted position; and An elastic body that biases one end of the link member in a direction in which the moving support approaches the support surface, and when the moving support is at the protruding position and in the vicinity thereof, the elastic body passes through the link member. The force for urging the moving support in the direction of the support surface is greater than the gravity acting on the supported object, and when the moving support is in the retracted position and in the vicinity thereof, the elastic body is moved via the link member. The force that urges the support in the direction of the support surface acts on the supported object. Object support device according to claim 1, characterized by being set to be smaller than gravity. 3. The moving support is held by a rotating arm pivotally attached to a supported object, and a biasing mechanism is provided by first and second cam surfaces formed on the rotating arm; Is located at or near the protruding position, the first cam surface is contacted with a rotating portion, and when at or near the retracted position, the second cam surface is rotated.
An urging arm pivotally attached to the supported object so that the rotating portion can contact the cam surface, and an elastic body for urging the urging arm, wherein the first cam surface is an urging arm. The force for urging the moving support body in the direction of the support surface via the rotating arm when the second cam surface is urged by the rotating portion is greater than the gravitational force acting on the supported object. The first and second moving members are urged in the direction of the support surface via the turning arm when the force is urged from the turning portion of the urging arm so that the force is smaller than the gravity acting on the supported object. The object support device according to claim 1, wherein the angle of the second cam surface is different. 4. A cam body formed on a part of said elevating rod, wherein said moving support is held by an elevating rod provided on a supported object, and a cam body formed when said elevating rod moves up and down. An urging member pivotally pivotally attached to the supported object by moving the distal end thereof on the moving system path, and an elastic body for urging the urging member. When the cam body is in the vicinity, the cam body is held at a position urged by the tip of the urging member, and a force for urging the moving support in the support surface direction via the cam body acts on the supported object. It is set so as to be larger than the gravity, and when the moving support is in the retracted position and in the vicinity thereof, the cam body is held at a position where the cam body is not biased by the tip of the biasing member, and the moving support is supported by the supporting surface. Set so that the biasing force in the direction is smaller than the gravity acting on the supported object In addition, the urging member receives the urging force of the distal end of the urging member from the cam body as the moving support moves from the retracted position to the protruding position without being affected by gravity acting on the supported object. 2. The object supporting device according to claim 1, wherein the device is configured such that only the tip portion can be temporarily retracted from the moving path of the cam body. 5. A moving support is held on a swing frame attached to a supported object via an engaging portion comprising a long hole and a shaft, and a biasing mechanism is formed on a part of the swing frame. Biasing surface, a biasing slider disposed at a position where the moving support can come into contact with the biasing surface when it is at or near the protruding position, and an elastic body for biasing the biasing slider When the support for movement is at or near the protruding position, a force for biasing the support for movement in the direction of the support surface by the biasing slider via the biasing surface acts on the supported object. It is set to be larger than the gravity, and when the moving support is in the retracted position and in the vicinity thereof, the urging surface is held at a position not urged by the urging slider, and the moving support is oriented in the supporting surface direction. The force acting on the object is smaller than the gravity acting on the supported object In addition, the urging surface of the swing frame is urged by the urging slider with the movement of the moving support from the retracted position to the projecting position without being affected by gravity acting on the supported object. 2. The object supporting device according to claim 1, wherein the object supporting device is configured to return to a position where the object is obtained. 6. The moving support is constructed such that one end is pivotally connected to each other and the other end is slidably supported by the supported object, so that the pivot point can be moved toward and away from the support surface. A first elastic body for holding the pair of link members at the pivot point and urging the urging mechanism in the direction of the support surface, and increasing the crossing angle of both link members at the pivot point. And a second elastic body that urges in a direction in which the moving support is located at and near the projecting position.
The sum of the urging forces of the second elastic body is made to act on the moving support as an urging force in the direction of the support surface, and the urging force is set to be larger than the gravity acting on the supported object. When the body is in the retracted position and its vicinity, the difference between the urging forces of the first and second elastic bodies acts on the moving support as an urging force toward the support surface, and the urging force acts on the supported object. 2. The object support device according to claim 1, wherein the object support device is set to be smaller than gravity. 7. A moving support is engaged with an object to be supported via a guide portion, and the guide portion guides the moving support so as to be able to move toward and away from the support surface, and further includes an urging mechanism. A link member, one end of which is slidably attached along a downward guide surface provided on the supported object and the other end of which is pivotally connected to the moving support, in a direction in which the moving support approaches the supporting surface. An elastic body for urging one end of the link member, and urging means for urging the moving support along the guide portion in a direction in which the moving support approaches the support surface, wherein the moving support is When the elastic body and the urging means urge the moving support through the link member in the direction of the support surface when the elastic body and the urging means are at the projecting position or in the vicinity thereof, the force is larger than the gravity acting on the supported object, and When the body is at or near the retracted position, the elastic body and Object support device according to claim 1, wherein the force that urges the moving support supporting surface direction through the member and characterized by being set smaller than the gravity acting on the supported object. 8. The object supporting apparatus according to claim 7, wherein the urging means includes an auxiliary elastic body for urging the upper end of the moving support along the guide portion. 9. A downwardly directed guide surface is provided with an inclined surface for retracting one end of the link member in a direction in which the biasing force of the elastic body does not reach in accordance with the movement of the moving support from the projecting position to the retracted position. The object support device according to claim 7 or 8, wherein: 10. A kick spring for pressing one end of a link member toward a downward guide surface is provided at a pivot position between the other end of the link member and the support for movement. Or the object support device according to 9. 11. A cartridge structure in which the stopping support, the moving support, and the biasing mechanism have a cartridge structure that can be integrally mounted on the supported object together with the guide portion. The object support device according to 8, 9, or 10. 12. The apparatus according to claim 1, wherein the moving support is a caster supported on a supported object.
The object support device according to 4, 5, 6, 7, 8, 9, 10, or 11. 13. The apparatus according to claim 1, wherein said stopping support is an adjuster for supporting a supported object in a height-adjustable manner. 13. The object support device according to 10, 11, or 12. 14. The apparatus according to claim 1, wherein the supported object is a folding table having a top plate capable of flap operation. , 11, 1
14. The object support device according to 2 or 13.