JPH0822649B2 - Interlocking operation mechanism of casters in beds etc. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlocking operation mechanism for casters in a bed or the like.

[0002]

2. Description of the Related Art Recently, a bed or the like is provided with a mechanism capable of lifting and lowering the entire bed or a floor plate and undulating and adjusting, and various accessory parts to complicate the structure and increase the weight.
Therefore, in many cases, casters are provided on the bed legs for easy movement. In addition, such casters are provided with a lock mechanism.When the bed is transported to a predetermined position, the pedal for operating the lock mechanism is depressed to lock the casters so that the bed is fixed so as not to move. ing.

[0003]

However, as described above, as the bed becomes heavier, a large amount of labor is required to move the bed alone. For example, when changing the moving direction of the bed, one of the casters is fixed and the other caster is free, and the end of the bed is grasped and moved. When attempting to change direction by grasping a part, the bed rotates around the caster on the fixed side as the center of rotation and the distance from the fixed caster to the end of the bed to be operated is the radius of rotation, so the force to change the direction is It can be small, but the carrier must make a large turn (see Figure 16). On the other hand, when the caster on the operating side is fixed, the turning radius is small, but a large force is required (see FIG. 17). In view of the above problems, the present invention provides a caster serving as the center of rotation at the center of the bed (position of the center of gravity) (see FIG. 18), so that the radius of rotation and the force for changing the direction are not required so much. It was devised based on the idea that operations would be possible.

[0004]

To solve the problems mentioned above SUMMARY OF THE INVENTION The present invention provides a bed or the like lockable operated simultaneously with the two ends interlocking the locking mechanism built casters provided on the side mechanism of the base frame, wherein One of the base frame
Lock the lock mechanism between the casters on the end side and the other end side.
The base frame is connected so that it can be interlocked by a rotating shaft.
The lock operation means is attached to the rotary shaft of the caster on the one end side.
While the base frame is provided, the caps on both end sides of the base frame are
The rotating shaft of the star is linked by an interlocking rod so that it can be interlocked.
At the center of the frame, cross the interlocking rod.
A rotatable shaft member, and the rotatable arm is attached to the shaft member.
When projecting and connecting to the interlocking rod through the interlocking arm,
On the rotating arm, a steering caster is provided,
Depending on the step, through the rotation axis, interlocking rod, interlocking arm, and pivoting arm
With the casters for steering removed from the floor,
Interlock the lock and remove the steering casters from the floor.
With the casters in place, the casters are allowed to run straight
The steering caster is grounded on the floor surface and the bed etc. can be steered while the lock is released . Further, in the above-described configuration, the steering caster has wheels and wheels.
The supporting piece protruding from the shaft member is connected to the supported wheel support frame.
The wheel support frame is supported on the support piece.
Auxiliary members can be used to bend only in one direction.
In, characterized by comprising a repulsion means to prevent the bending of the pre-Symbol wheel supporting frame. Further, in the above-mentioned configuration, the steering caster can be arranged at the center of gravity of the bed or the like.

[0005]

[Operation] When the lock operation means is operated, the rotation axis is interlocked.
Steering casters can be moved from the floor through the rod, interlocking arm, and rotating arm.
The casters are locked together with the caster being released.
Can and child. Also, unlock the casters and press the key.
When the caster is set to the straight running state , the steering caster is separated from the floor surface, and the bed or the like can be moved linearly. When the lock operation means is operated in the opposite direction to the lock operation, the casters are unlocked.
At the same time, the casters for steering are grounded to the floor. Here, the carrier grips the end of the bed or the like and pushes or pulls it in the lateral direction to move the bed around the steering caster from the steering caster to the end of the bed or the like . Rotate with the distance to the part as the turning radius and change direction
You can The steering casters are wheel-supported.
Since it is flexibly supported by the frame and repulsion means,
Trying to return the bent state to a straight line,
Even if there are irregularities, the wheels can follow the floor
It Furthermore, place the casters for steering at the position of the center of gravity of the bed, etc.
The arrangement makes it easier to change the direction.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a mechanism for interlocking casters in a bed according to the present invention. In FIG. 1, reference numeral 1 indicates a leg portion to which a caster interlocking operation mechanism in a bed or the like according to the present invention is applied. This leg portion 1 has casters 3 with a built-in lock mechanism (described later) attached to a base frame 2.

Of the casters 3, the caster 3 on one end side in the longitudinal direction of the base frame 2 is provided with a lock operating means for operating a lock mechanism, that is, an operation pedal 4, and the casters on one end side thereof are provided. 3 is connected by a rotary shaft 5 of an operation pedal 4. The caster 3 on the other end side is also connected by the interlocking shaft 6. The rotating shaft 5 and the interlocking shaft 6 are connected by an interlocking rod 7 so that they can be interlocked with the operation pedal 4.

At the central portion of the base frame 2, a shaft member 8 is rotatably provided so as to intersect with the interlocking rod 7.
And a steering caster 9 is attached to the shaft member 8. In addition, the pivot member 10 is attached to the shaft member 8.
Is projectingly provided, and is connected to the interlocking rod 7 via the interlocking arm 11 to the rotating arm 10.

Next, an example of the casters 3 is shown in FIG. 2 and will be described in detail. That is, in this caster 3, a wheel support frame 13 that supports the wheels 12 is rotatably fixed under a support shaft 14, and the tip ends of the wheel support frame 13 are fixed to the wheels 12.
The brake bar 15 which is brought into contact with the above is fixed so as to be movable up and down, and the operating rod 1 is provided in the support shaft 14 so as to be movable up and down.
A lock member 17 for pressing the upper side of the brake piece 15 is provided at the lower end of 6. The actuating rod 16 is biased upward by a spring 18 and a cam 19 for moving the actuating rod 16 downward is provided on the support shaft 14. The cam 19 rotates the rotating shaft 5 across the support shaft 14. Actuating rod 16 by movement
First, the lock piece 17 is moved to press the brake piece 15 against the wheel 12 to lock the wheel 12.
The second position where the brake piece 15 is brought into contact with the upper side of the wheel support frame 13 so that only straight running is possible, and the third position where both straight running and direction change are possible Is.

As shown in FIG. 3, the steering caster 9 is constructed by connecting a wheel 20 and a wheel support frame 21 supporting the wheel 20 to a support piece 22 projecting from the shaft member 8. The wheel support frame 21 is bendable in only one direction with respect to the support piece 22 by the support auxiliary member 23. Although not shown, the wheel support frame 21 has a repulsion means on the side where it bends. The steering caster 9 can be arranged according to the center of gravity of a bed or the like.

Since the caster interlocking operation mechanism in the bed or the like according to the present invention is constructed as described above,
When the operation pedal 4 is depressed , the cast on one end side
The interlocking rod 7 is interlocked by the pivoting of the pivot shaft 5 of the switch 3,
The caster 3 on the end side is held at the first position for locking the wheel 12, and the interlocking shaft 6 of the caster 3 on the other end turns to rotate the caster 3 on the other end also to the first position. Held in position. At this time, the interlocking arm 11 is pulled to the left in the figure by the interlocking of the interlocking rod 7, so that the rotating arm 10 rotates counterclockwise and the shaft member 8 rotates, and the steering caster 9 moves from the floor surface. Detach (see Figure 4).

Next, the operation pedal 4 is reversed from the above-mentioned state.
When the pedal 3 is stepped to the horizontal position , the wheel 12 is held at the second position in the caster 3 on the one end side so that the brake piece 15 is brought into contact with the upper side of the wheel support frame 13 to allow only straight traveling. that when both associated rod 7 returns, interlocking arm 11 and the steering caster 9 via the rotational arm 10
Rotates slightly clockwise. In this situation,
The steering caster 9 is in a state of being separated from the floor surface. In this state, the operator can linearly move and transport the bed or the like (see FIG. 5).

Then, the operation pedal 4 is reversed from the lock operation.
When the pedal is further depressed , the interlocking rod 7 is displaced to the right in the figure, and the caster 3 is held in the third position where it is in a state where it is possible to run straight and change direction. The interlocking arm 11 is displaced rightward together with the interlocking rod 7, and the rotating arm 10 rotates clockwise, so that the steering caster 9 is grounded on the floor surface (FIG. 6).
reference). At this time, the caster 9 for steering is supported by the support assisting member 23.
Since it is configured to be bendable only in one direction and the rebound means tries to restore the bent state to the straight state, the wheels 12 follow the floor surface even if there is some unevenness on the floor surface. (See FIGS. 7 and 8).

Here, the carrier grabs the edge of the bed and moves sideways.
When you push it in or pull it out, caster 3
Since the bed is in a free state, the bed has steering casters 9
With the distance from the caster 9 for steering to the end of the bed as the radius of rotation, the direction can be easily changed.
it can. In addition, if the position of the caster 9 for steering is made to correspond to the center of gravity of the bed, the bed can be turned without difficulty.

Next, another embodiment of the interlocking operation mechanism of casters in a bed or the like according to the present invention will be described. In this case, components that are substantially the same as those of the interlocking operation mechanism in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. That is, as shown in FIG. 9, in the leg portion 30 in this embodiment, the shaft member 8 in the central portion of the base frame 2 is provided.
Are arranged so as to cross over the interlocking rod 7, and are connected via an interlocking arm 11. The steering caster 31 includes the wheels 20 and the wheel support frame 2 that supports the wheels 20.
1, a support piece 22 protruding from the shaft member 8 is connected, and the wheel support frame 21 can be bent in only one direction with respect to the support piece 22 by a support auxiliary member 23. A support means 32 is provided on the shaft member 8 in a direction opposite to the bending direction of the wheel support frame 21, and the wheel support frame 21 is provided between the support means 32 and the wheel support frame 21. And a spring member 33 for holding the support piece 22 in line with each other (see FIG. 10).

According to the caster interlocking operation mechanism described above, when the caster 3 is held at the first position for locking the wheels 12 by depressing the operation pedal 4, the interlocking rod 7 interlocks. The rudder caster 31 rotates clockwise and is in a state of being separated from the floor surface (see FIG. 11).

Next, when the operation pedal 4 is depressed in the opposite manner to the above, and the casters 3 are held in the second position where the wheels 12 can only travel straight ahead, the interlocking rod 7 is moved. After returning, the steering caster 31 slightly rotates counterclockwise, but the steering caster 31 is in a state of being separated from the floor surface. In this state, the operator can move and transport the bed or the like on a straight line (see FIG. 12).

When the operation pedal 4 is operated in the opposite direction to the lock operation, the interlocking rod 7 is displaced to the right in the figure, and the caster 3 is moved to the third position where it is in a state where it can run straight and change direction. Retained. As a result, the steering caster 31 is grounded to the floor surface (see FIG. 13). At this time, the steering caster 31 can cause the wheel 12 to follow the floor surface by the spring member 33 even if the floor surface has some irregularities (FIG. 1).
4, FIG. 15). In this state, the carrier grabs the end of the bed and pushes it in or pulls it in to pull the bed around the steering caster 31 and the steering caster 3.
Rotate with the distance from 1 to the edge of the bed as the radius of rotation,
You can change the direction. The steering casters 3
If the position of 1 corresponds to the center of gravity of the bed, the bed can be turned around without fail.

[0019]

As described above, according to the present invention, the casters such as the bed are locked by the lock operation means, the casters and the casters for steering are released, and the beds and the like can be transported, and the casters are released. At the same time, the casters for steering are grounded on the floor so that the bed and the like can be steered, so that the handling of the bed is significantly improved.

[0020]

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of legs of a bed or the like to which a caster interlocking operation mechanism according to the present invention is applied.

FIG. 2 is a cross-sectional explanatory view of essential parts showing an example of casters of the legs shown in FIG.

FIG. 3 is a side view illustrating an example of a steering caster.

FIG. 4 is a side view for explaining the function of the interlocking operation mechanism of the caster according to the present invention.

FIG. 5 is a side view illustrating the function of the interlocking operation mechanism of the caster according to the present invention.

FIG. 6 is a side view illustrating the function of the interlocking operation mechanism of the caster according to the present invention.

FIG. 7 is a side view illustrating the function of a steering caster.

FIG. 8 is a side view illustrating the function of a steering caster.

FIG. 9 is a perspective explanatory view showing another embodiment of the leg portion of the bed or the like to which the caster interlocking operation mechanism according to the present invention is applied.

FIG. 10 is a side view showing an example of the caster for steering the leg shown in FIG. 9.

FIG. 11 is a side view for explaining the function of the interlocking operation mechanism of the caster according to the present invention.

FIG. 12 is a side view for explaining the function of the interlocking operation mechanism of the caster according to the present invention.

FIG. 13 is a side view for explaining the function of the interlocking operation mechanism of the caster according to the present invention.

FIG. 14 is a side view illustrating the function of a steering caster.

FIG. 15 is a side view illustrating the function of a steering caster.

FIG. 16 is a diagram illustrating the function of a conventional bed.

FIG. 17 is a diagram illustrating a function of a conventional bed.

FIG. 18 is a diagram illustrating the concept of bed functions in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg 2 Base frame 3 Castor 4 Operating pedal 5 Rotating shaft 6 Interlocking shaft 7 Interlocking rod 8 Shaft member 9 Steering caster 10 Rotating arm 11 Interlocking arm 12 Wheel 13 Wheel support frame 14 Support shaft 15 Brake piece 16 Actuation rod 17 Lock Member 18 Spring 19 Cam 20 Wheel 21 Wheel Support Frame 22 Support Piece 23 Support Aid Member 30 Leg 31 Steering Castor 32 Support Means 33 Spring Member

Claims (3)

[Claims] 1. A bed or the like in which casters having lock mechanisms built in at both ends of the base frame can be simultaneously locked by an interlocking mechanism , and one end of the base frame is provided.
Rotate the lock mechanism between casters on the
One of the base frame is connected so that it can be interlocked by a moving shaft.
Attach the lock operation means to the rotary shaft of the caster on the end side.
While providing, the casing on both sides of the base frame
The rotary shaft of the
At the center of the rame, cross the interlocking rod.
A rotatable shaft member, and the rotatable arm is attached to the shaft member.
When projecting and connecting to the interlocking rod through the interlocking arm,
On the rotating arm, a steering caster is provided,
Depending on the step, through the rotation axis, interlocking rod, interlocking arm, and pivoting arm
With the casters for steering removed from the floor,
Interlock the lock and remove the steering casters from the floor.
With the casters in place, the casters are allowed to run straight
And unlock the steering wheel with the caster for steering.
Interlock operating mechanism of the caster in the bed or the like, characterized in that the steering state was allowed to ground beds de etc.. 2. The steering caster comprises wheels and wheels.
The support piece protruding from the shaft member is connected to the wheel support frame that supports the
The wheel support frame is supported on the support piece.
If it is configured to be bendable in only one direction by the holding aid member
Both interlock operating mechanism of the caster in the bed or the like according to claim 1, further comprising a repulsion means to prevent the bending of the vehicle wheel support frame. 3. The caster interlocking operation mechanism for a bed or the like according to claim 1, wherein the steering caster is arranged at a center of gravity of the bed or the like.