JPH0362423B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanism for raising and lowering a floor support frame of a bed, an examination table, a treatment table, etc.

(Prior Art) It is desirable that the height of the floor of a bed, examination table, treatment table, etc. can be adjusted as appropriate during examination, treatment, or treatment such as injection. Furthermore, depending on the type of disease, it may be necessary to incline the floor in order to maintain the patient's head side or foot side higher than the other side as part of the treatment.

A conventional lifting/lowering mechanism for a floor support frame that allows adjustment of the height and inclination of the floor is as follows:
For example, there is one shown in the schematic diagram of FIG. (For example, see Japanese Utility Model Publication No. 53-37515.) In this system, rotating rods b are provided on the head and foot sides of the floor support frame a, and an operating arm is attached to each of the rotating rods b. c, c are provided in a protruding manner, and their tips are rotatably fixed to a base d so as to form a parallel link mechanism. It is supported on a base d.

In this way, by rotating the operating arm c using a suitable rotating means, the floor support frame a is raised, lowered, or tilted. That is, if the operating arms c on the head side and the foot side are rotated in conjunction as parallel links,
The floor support frame a can be raised and lowered in parallel, and if the operating arm c on either the head side or the foot side is rotated as appropriate when the floor support frame a is in the raised state, the floor support The frame a can be tilted at a desired angle. Note that the drive mechanism for rotating the operating arm c is omitted in the figure.

(Problems to be Solved by the Invention) In the conventional mechanism shown in FIG. 4, the locus of movement of the floor support frame a when it goes up and down curves in the longitudinal direction as shown in FIG. 4b. If a wall or the like is adjacent to the protruding side, there is a drawback that it may collide with the wall and cause damage.

The present invention aims to solve such problems.

(Means for Solving the Problems) Means for solving the above-mentioned problems will be explained based on FIGS. 1 to 3 corresponding to the embodiments.
The elevating mechanism of the present invention includes rotating rods 2 (2a, 2b) on the head side and foot side of the floor support frame 1 in the short direction.
and an operating arm 3 (3
a, 3b) are provided protrudingly, and their tips are rotatably supported on the base 4 so as to constitute a parallel link mechanism, so that the floor support frame 1 can be raised/lowered or tilted with respect to the base 4. In the lifting/lowering tilting mechanism, the tip of the operating arm 3 supports the base 4 so as to be movable in the longitudinal direction along with the rotation, and one of the operating arms 3a on the head side or the foot side The first rotation fulcrum 5 is configured at an appropriate location, and the first rotation fulcrum 5
Rather, a second pivot point 6 is configured on the base 4 corresponding to the pivot rod 2a side on which the operating arm 3 is protruded, and a gap is formed between the first and second pivot points 5 and 6. Rotation support arm 7
The second pivot fulcrum 6 is constructed on a vertical line l intersecting the axis of the pivot rod 2a on which the operating arm 3a, which constitutes the first pivot fulcrum 5, is protruded; The distance between the second rotation fulcrum 6 and the first rotation fulcrum 5 is configured to be equal to the distance between the first rotation fulcrum 5 and the rotation rod 2a, and the rotation Each of the rods 2 is provided with rotation drive means 8 (8a, 8b) that can be operated independently of each other.

(Function) The rotation driving means 8 of the rotation rod 2 is driven to similarly rotate the rotation rods 2a, 2b on the head side and the foot side, and the operating arms 3a, 3b protruding from these. When it is moved, the floor support frame 1 rises or falls in parallel depending on the direction of rotation. At this time, the movement of the tip of the actuating arm 3 is restricted by the rotation support arm 7 and the base 4
perform longitudinal movement.

That is, the first rotation fulcrum 5 configured on the operating arm 3a
The movement of this part is regulated on the rotation locus of the rotation support arm 7 that rotates around the second rotation fulcrum 6, and this second rotation fulcrum 6 is located on the rotation rod 2a side. Therefore, the change in length of each actuating arm 3a, 3b due to rotation in the longitudinal direction of the base 4 is absorbed by the movement of the distal end side of the actuating arm 3 in the longitudinal direction. be done. That is, the second rotation fulcrum 6
is constructed on the vertical line l passing through the axis of the rotation rod 2a, and the distance between the second rotation support 6 and the first rotation support 5 is such that the distance between the second rotation support 6 and the rotation support 5 is Moving rod 2
Since the distance between the pivot rod 2a and the pivot rod 2b connected via the parallel link mechanism is equal to the distance between the two and Move up and down.

After raising the floor support frame 1 and adjusting it to a desired height, if at least one of the rotation driving means 8a and 8b of the rotation rod 2 is driven, a rotation support that restricts the movement of the operating arm 3 is created. Since the arm 7 is connected to only one of the operating arms 3a, the floor support frame 1 can be freely tilted in its longitudinal direction. For example, if only one side 8b of the rotating means is driven, the rotating rod 2a
performs only rotational movement at the current position, but the rotational rod 2
Since b moves on a circular arc trajectory centered on the axis of the rotating rod 2a along with its own rotational movement, the rotating rod 2b
The floor support frame 1 on the side can be raised or tilted relative to that on the side of the rotation rod 2a depending on the direction of rotation of the rotation rod 2b. The same applies when the other rotating means 8a is driven, and the floor support frame 1 on the rotating rod 2a side
is raised and lowered relative to that of the rotating rod 2b.

(Embodiment) Next, to explain the illustrated embodiment, in the embodiment shown in FIG. Rod 2a,
It consists of drive arms 9a, 9b protruding from 2b and drive rods 10a, 10b rotatably connected to these, and the drive rods 10a, 10b are moved forward and backward in the longitudinal direction of the floor support frame 1, The rotating rods 2a and 2b are configured to rotate. In this embodiment, such forward and backward movement of the drive rod 10 is achieved by screwing the tip of the drive rod 10 into a female screw portion (not shown) with a threaded shaft (not shown) configured inside the second drive rods 11a, 11b. This screw shaft is connected to the motor 12a,
12b, each drive rod 1
Although the structure is such that each of 1a and 11b can be driven independently, it is also possible to use a telescopic rod such as a hydraulic cylinder.

Further, the operating arm 3 has a pin 14 protruding therefrom.
The actuating arm 3 is supported by being slidably engaged with a groove 13 formed in the longitudinal direction of the base 4. In addition, the operating arm 3 is supported by being slidably engaged with a groove 13 formed in the longitudinal direction of the base 4. If the structure supports this, it can be supported appropriately.

By moving the drive rods 10a and 10b configured as described above simultaneously or independently in the longitudinal direction of the floor support frame 1, the floor support frame 1 can be raised, lowered, or tilted. FIG. 2 shows the state transition.

That is, the floor support frame 1 is normally positioned at its lowering limit as shown in FIG. 2a so that patients and the like can easily move up and down. Floor support frame 1 in this state
To raise the drive rods 10a and 10, the rotation rods 2a and 2b similarly rotate counterclockwise.
b should be moved forward and backward at the same time, and once the floor support frame 1 reaches the desired height as shown in Fig. 2b,
Now, by moving only one of the drive rods forward or backward, the floor support frame 1 can be tilted to a desired angle, as shown in FIG. 2c. Incidentally, the floor support frame 1 can be tilted by moving either one of the drive rods forward or backward from the lowering limit.

The movements of the rotating rod 2a and the operating arm 3a during the raising process of the floor support frame 1 described above are as shown in FIG. When the operating arm 3a is in the state indicated by symbol A, the floor support frame 1 is at its lowering limit, and in this state, when the rotating rod 2a rotates counterclockwise, the operating arm 3
a also rotates counterclockwise, sign B and then sign C.
Finally, the floor support frame 1 reaches a high position. At this time, in the present invention, the actuating arm 3a is not only rotatably supported on the base 4 as described above, but also movably supported in the longitudinal direction of the base 4, and moreover, the actuating arm 3a is Since the rotation support arm 7 is provided between the operating arm 3a and the base 4, the first rotation fulcrum 5 of the rotation support arm 7 formed thereon is connected to the second rotation support arm 7 formed on the base 4. It moves in a circular arc centered on the rotation fulcrum 6.

Therefore, the movement locus of the rotating rod 2a is different from the curved locus X when the supporting end of the operating arm 3 is simply fixed, and is a straight line locus from A to D mentioned above. That is, as described above, the second pivot point 6 is located on the vertical line l passing through the axis of the pivot rod 2a, and the distance between the second pivot point 6 and the first pivot point 5 is Since the distance is equal to the distance between the first rotation fulcrum 5 and the rotation rod 2a, the rotation rods 2a and 2b
As a result, the movement locus of the fixedly supported floor support frame 1 becomes straight in the vertical direction. In this way, the floor support frame 1 does not move in the longitudinal direction when going up and down, so even if there is a wall adjacent to the protruding side, it will not collide with the wall and cause damage. Although the above operation has been explained when the floor support frame 1 is lowered, it goes without saying that it is the same when the floor support frame 1 is raised.

(Effects of the Invention) As described above, in the lifting and tilting mechanism of the present invention, the floor support frame can be freely raised, lowered, and tilted, and the movement locus of the floor support frame is directed outward when going up and down. Since it is straight in the vertical direction without being curved, and does not protrude in the lateral direction at all, the floor support frame will not collide with the wall etc. and be damaged during lifting and lowering, and the lifting and lowering operations can be performed safely. It has the effect of being able to.

[Brief explanation of drawings]

1 to 3 correspond to an embodiment of the present invention. FIG. 1 is an overall perspective view, FIGS. 2 a, b, and c are schematic side views showing the operation, and FIG. 3 is an essential view. FIG. Further, FIGS. 4a and 4b are a schematic side view of a conventional example and a schematic side view showing state transition, respectively. Code 1... Floor support frame, 2 (2a, 2b)...
Rotating rod, 3 (3a, 3b)... Operating arm, 4... Base, 5... First rotating fulcrum, 6... Second rotating fulcrum, 7... Rotating support arm, 8 (8a, 8b)... Rotating means, 9 (9a, 9b)... Drive arm, 10 (1
0a, 10b)...Driving rod, 11 (11a, 11
b)...Second driving rod, 12 (12a, 12b)
...Motor, 13...Slot, 14...Pin.

Claims (1)

[Claims] 1 Rotating rods are provided on the head and foot sides of the floor support frame, and in the lateral direction thereof, and operating arms are provided protruding from each of the rotating rods, so that their tips can form a parallel link mechanism. In the lifting and tilting mechanism that is rotatably supported on a base and raises, lowers, or tilts the floor support frame with respect to the base, the tip of the operating arm is movable in the longitudinal direction of the base along with the rotation. A first rotation fulcrum is formed at an appropriate location on either the head side or the foot side of the operating arm, and the operation arm is provided to protrude beyond the first rotation fulcrum. A second rotation fulcrum is configured on a base corresponding to the rotation rod side, and a rotation support arm is connected between the first and second rotation fulcrums, and the second rotation fulcrum is configured to: The operating arm constituting the first rotation fulcrum is configured on a vertical line intersecting the axis of the protruding rotation rod, and the distance between the second rotation fulcrum and the first rotation fulcrum is The distance between the first rotation fulcrum and the rotation rod is configured to be equal to the distance between the first rotation fulcrum and the rotation rod, and each of the rotation rods is provided with a rotation driving means that can be operated independently of the other. Lifting and tilting mechanism for the floor support frame.