JPH02154760A - Ascending/descending and inclining mechanism for bed supporting frame - Google Patents

Abstract

PURPOSE:To freely execute operations for ascending/descending and inclining a bed and to safely execute ascending/descending operations by connecting the rotation supporting arm between the first and second rotation supporting points and further providing separately operable rotation driving means for respective rotating rods. CONSTITUTION:When rotation driving means 8a and 8b of rotating rods 2a and 2b are driven, and the head side and foot side rotating rods 2a and 2b and actuating arms 3a and 3b projectingly provided for the rods 2a and 2b are respectively rotated in the same manner, a bed supporting frame 1 is ascended/descended in parallel according to the rotational direction. At this time, since the tips of the actuating arms 3a and 3b are supported on a pedestal 4 under a movable state in the longitudinal direction of the pedestal 4, the actuating arms 3a and 3b move in the longitudinal direction of the pedestal 4 accompanying the rotation, and since a rotation supporting arm 7 is connected to one actuating arm 3a, the movement of both the actuating arms 3a and 3b are regulated. Consequently, when the bed supporting frame 1 is ascended/ descended, the sides of the rotating rods 2a and 2b of the actuating arms 3a and 3b never move in the longitudinal direction but move vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanism for lifting and lowering a floor support frame.

(Prior Art) It is desirable that the height of the floor of an examination table, treatment table, bed, 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 tilt the floor section in order to maintain the patient's head side or foot side higher than the other side as part of the treatment.

An example of a conventional lifting/lowering mechanism for a floor support frame that allows adjustment of the height and inclination of the floor is shown in the schematic diagram of FIG. 6. (Refer to Utility Model Publication No. 53-37515.) In this system, pivoting rods are provided on the head and foot sides of the floor support frame a in the short direction, and operating arms C and C are attached to each of the pivoting rods. are provided protrudingly, and their tips are rotatably fixed to the base d so as to form a parallel link mechanism.
At this time, one of the operating arms C is supported on the base d via the floating support arm e. In this manner, by rotating the actuating arm C using a suitable rotating means, the floor support frame a is raised, lowered, and tilted. That is, if the operating arms C on the head side and the foot side are connected and rotated as a parallel link, the floor support frame a can be raised and lowered in parallel, and the raised state of the floor support frame a can be adjusted. In this case, if the operating arm C on either the head side or the foot side is rotated appropriately, the floor support frame a
can be tilted to a desired angle. Note that the drive means for rotating the operating arm C is omitted in the figure.

(Problems to be Solved by the Present 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. 4(b). , if there is a wall e etc. adjacent to it, there is a drawback that it may come into contact with the wall and cause damage.

The present invention aims to solve such problems.

(Means for Solving the Problems) The configuration of the present invention will be explained based on FIGS. 1 to 3 corresponding to embodiments.

First, the mechanism recited in claim 1 comprises a floor support frame 1
Rotating rod 2 (2a
, 2b), and each of the rotating rods 2 is provided with an actuating arm 3 (
3a, 3b), and create 1jJ I! In the elevating and inclining mechanism for elevating or inclining the floor support frame 1 with respect to the base 4, the tip of the 1it3 is rotatably supported on the base 4 so as to constitute a parallel link mechanism. The tip of the actuating arm 3 supports the base 4 so as to be movable in the longitudinal direction along with the rotation, and a first actuating arm 3a is provided at an appropriate position on either the head side or the foot side of the actuating arm 3. Constructing a rotation fulcrum 5, and configuring a second rotation fulcrum 6 on the base 4 corresponding to the side of the rotation rod 2a on which the operating arm 3a is protruded from the first rotation fulcrum 5, A rotation support arm 7 is connected between the first rotation fulcrum 5 and the second rotation fulcrum 6, and each rotation rod 2 has a rotation drive means 8 that can be operated independently of the other. (8a,
8b).

Next, in the mechanism described in item 2, in the mechanism described in item 1, the second rotation fulcrum 6 is a rotation rod 2a on which an actuating arm 3a, which constitutes the first co-movement fulcrum 5, is protruded. It is constructed on a vertical line O that intersects the axis of It is composed of

The mechanism described in item 3 is the mechanism described in item 1 above, in which the driving means 8 for rotating the rotation rod 2 is.

Drive arms 9 (9a, 9b) protruding from the rotation rod 2, and a drive rod 10 (10a) rotatably connected to the drive arms 9 and movable in the longitudinal direction of the floor support frame 1. , 10
b).

(Function) The rotation driving means 8 of the rotation rod 2 is driven to similarly rotate each of the rotation rods 2a, 2b on the head side and the foot side, and the actuating arms 3a, 3b protruding therefrom. When it is moved, the floor support frame 1 rises or falls in parallel depending on the direction of rotation. At this time, since the tip of the actuating arm 3 is supported by the base 4 so as to be movable in the longitudinal direction, the actuating arm 3 moves in the longitudinal direction of the base 4 along with the rotation. Since the rotation support arm 7 is connected to one side 3a of the arms 3, the movement of both the operating arms 3a and 3b is regulated by the rotation support arm 7.

That is, the five tenth rotation fulcrums formed on the operating arm 3a are restricted from interlocking with each other on the rotation locus of the rotation support arm 7 around the second rotation fulcrum 6, and Since the fulcrum 6 is configured on the rotating rod 2a side, the change in length of the operating arm 3 (3a, 3b) due to rotation in the longitudinal direction of the base 4 is caused by the change in the length of the operating arm 3 (3a, 3b) in the longitudinal direction. This is absorbed by the movement of the distal end of the arm 3, and therefore, when the floor support frame 1 is raised and lowered as described above, the rotating rod 2 side of the working arm 3 moves up and down without moving in the longitudinal direction. In particular, the second rotation fulcrum 6 is configured on a vertical line (above) that intersects the axis of the rotation rod 2a, and the distance between this and the first rotation fulcrum 5 is the same as that of the first rotation If the distance between the pivoting fulcrum 5 and the pivoting rod 2a is configured to be equal to the distance between the pivoting rod 5 and the pivoting rod 2a, the pivoting levers 2a and 2b will not move at all in the longitudinal direction, but will move up and down on the vertical axis 1. do.

After raising the floor support frame 1 and adjusting it to a desired height, if at least one of the rotation means 8a and 8b of the rotation rod 2 is driven, the rotation support arm that restricts the movement of the operating arm 3 is activated. Since 7 is connected only to one side 3a of the operating arm 3, the floor support rod 1 can be freely tilted in its longitudinal direction. For example, when only one side 8b of the rotating means 8 is driven, the rotating rod 2a only rotates at the current position;
Since b moves on an arcuate trajectory centered on the axis of the rotating rod 2a along with its own rotation, the floor support rod 1 on the rotating rod 2b side moves according to the direction of rotation of the rotating rod 2b. Rotating rod 2
It can be raised or tilted relative to that on the a side. The same applies when the other rotating means 8 8a is driven, and the floor support frame 1 on the rotating rod 2a side moves up and down relative to that on the rotating rod 2b.

〔Example〕

In the embodiment shown in FIG. 1, the rotation means 8a, 8b of the rotation rods 2a, 2b on the head side and foot side of the floor support frame 1 are provided with drive arms 9a protruding from the rotation rods 2a, 2b, respectively. , 9b, and drive rods 10a, 1ob rotatably connected to the drive rods 10a, 9b.

10b is moved forward and backward in the longitudinal direction of the floor support frame 1 to rotate the rotation rod 2. In this embodiment, such forward and backward movement of the drive rod 10 is achieved by a screw shaft (not shown) constructed inside the second drive rod 11 (11a, 11b>) at the female threaded portion (not shown) at the tip. This screw shaft is connected to the motor 12 (12a, 12b) by screwing it together.
By rotating each drive rod 10a by
.

Although the configuration is such that it can be performed independently for each 10b, other suitable methods may be used, such as using a hydraulic cylinder.

The support frame 1 can be raised, lowered or tilted by moving the drive rods 10a and 10b having such a configuration simultaneously or independently in the longitudinal direction of the floor support frame 1. ! ! FIG. 2 shows the transition. The floor support frame 1 is normally positioned at its lowering limit as shown in FIG. 2(a) so that patients and the like can easily get off the floor. In order to raise the floor support frame 1 in this state, it is sufficient to move the drive rods 10a and 10b back and forth at the same time so that the rotation rods 2a and 2b similarly rotate counterclockwise. Once the frame 1 has reached the desired height as shown in Figure 2(b), by moving only one of the drive rods 10a, 10b forward or backward, the height will be as shown in Figure 2(C). Additionally, the floor support frame 1 can be tilted at a desired angle. Incidentally, the floor support frame 1 can be tilted by moving either one of the drive rods forward or backward from the lowering limit.

Rotating rods 2a, t during the first raising process of the floor support frame 1
3 and the movement of the operating arm 3a are as shown in FIG. When the actuating arm 3a is in the state indicated by symbol A, the floor support frame 1 is in the lowering range, and when the rotating rod 2a rotates counterclockwise in this state, the actuating arm 3a is moved to the base 4. Since it is rotatably supported, the actuating arm 3a also rotates counterclockwise.
It moves from reference numeral B to reference numeral C, and finally reaches the position indicated by reference numeral 1, bringing the floor support frame 1 to 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 Base 4
Since the rotation support arm 7 is provided in the garden, the first rotation fulcrum 5 of the rotation support arm 7 configured therein in the operating arm 3a is the second rotation fulcrum configured on the base 4. It moves in an arc centered at 6.

Therefore, the movement trajectory of the rotating rod 2a is different from the curved trajectory X when the supporting end of the operating arm 3a is simply fixed.
It becomes a linear trajectory from one sign to another. Especially the second
A vertical line A intersects the rotation fulcrum 6 with the axis of the rotation rod 2a.
In the case where the distance between the first rotation fulcrum 5 and the rotation rod 2a is equal to the distance between the first rotation fulcrum 5 and the second rotation fulcrum 6, The movement locus of the rotation rod 2a and the floor support frame 1 fixed thereto is straight.

In this way, the floor support frame 1 is not moved in the longitudinal direction when going up and down, so even if there is an adjacent wall, it will not come into contact with the wall and cause damage.

The above description has been made regarding the time when the floor support frame 1 is raised, but it goes without saying that the same applies when the floor support frame 1 is lowered.

In addition, the method of supporting the actuator@3a on the base 4 is, for example, by forming a groove 13 in the longitudinal direction on the base 4, and protruding a bottle 14 on the actuating arm 3, so that the bottle 14 can be moved freely in the groove 13. This may be done as appropriate.

(Effects of the Invention) As described above, in the lifting and tilting mechanism of the present invention, the floor can be freely raised and lowered and tilted as a floor support frame. The locus of movement is vertical without curving outward, and does not protrude sideways, so there is no chance of it hitting a wall or the like and damaging it, thus making it possible to safely perform lifting and lowering operations. .

[Brief explanation of the drawing]

1 to 3 correspond to embodiments of the present invention,
Figure 1 is an overall perspective view, Figure 2 (a), (b), (C)
3 is a schematic side view showing the operation, FIG. 3 is a schematic side view showing the state transition of the main parts, and FIGS. 4(a) and (b)
These are a schematic perspective view and a schematic side view showing state transition of a conventional example, respectively. Code 1: Floor support frame, 2 (2a, 2b): Rotating rod, 3 (3a, 3b): Operating arm, 4: Base, 5: First rotation Dynamic fulcrum, 6... second rotation fulcrum,
7... Rotating support arm, 8 (8a, 8b)... Rotating means, 9 (9a, 9 b),... Drive arm, 10 (10a, 10b)
) - drive rod, 11 (11a, 1lb)
- Second drive rod, 12 (12a, 12b) - motor, 13 - groove, 14 - bottle. Figure 2 (b) Figure 2 (C) Figure 2

Claims (3)

[Claims] (1) Rotating rods are provided in the lateral direction on the head and foot sides of the floor support frame, and operating arms are provided protruding from each of the rotating rods,
In the elevating and inclining mechanism for elevating or tilting the floor support frame with respect to the base, the tips of the actuating arms are rotatably supported on a base so as to constitute a parallel link mechanism, and the tips of the actuating arms are Along with the rotation, the base is supported so as to be movable in the longitudinal direction, and a first rotation fulcrum is formed at an appropriate position on either the head side or the foot side of the operating arm. A second rotation fulcrum is constructed on a base corresponding to the side of the rotation rod on which the operating arm is protruded from the rotation fulcrum, and a rotation support arm is provided between the first and second rotation fulcrums. A lifting and lowering tilting mechanism for a floor support frame, characterized in that the rotation rods are connected to each other and each of the rotation rods is provided with a rotation driving means that can be operated independently of the other. (2) In the mechanism described in paragraph 1, the second pivot point is
The operating arm that constitutes the first rotation fulcrum is arranged 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 1. A lifting and lowering tilting mechanism for a floor support frame, characterized in that the distance between one rotation fulcrum and the rotation rod is equal to the distance between the rotation fulcrum and the rotation rod. (3) In the mechanism described in item 1, the driving means for rotating the rotating rod is rotatably connected to the driving arms protruding from each of the rotating rods, and is rotatably connected to the respective driving arms. What is claimed is: 1. An elevating and lowering tilting mechanism for a floor support frame, comprising a drive rod configured to be movable in the longitudinal direction of the floor support frame.