JPH03118008A - Bed floor board lifting mechanism - Google Patents

Abstract

PURPOSE:To prevent the operating force from becoming large and to reduce the cost by providing projectingly a pair of direction converting links in the horizontal direction of an operating shaft, connecting them to an operating pin of a moving member, and also, connecting a driving link between the direction converting link of the other side and a push-up arm through spherical bearing parts provided on both ends, respectively. CONSTITUTION:When a crank handle 5a of one side is brought to rotational operation in the prescribed direction and a screw shaft 4a is rotated, a moving member 6a moves upward along the screw shaft 4a, therefore, a direction converting link 8a of one side turns in the width direction of a bed frame 1 since a long groove 10a part is driven by an operating pin 11a. In such a way, by turning of the direction converting link 8a of one side, an operating shaft 7a is turned counter-clockwise, and a direction converting link 9a of the other side turns in the longitudinal direction of the bed frame 1. In such a way, by turning of the direction converting link 9a of the other side, a driving link 13a is driven in the left direction, and by being pushed by the driving link 13a, a push-up arm moves in the left direction. Accordingly, a floorboard 2 turns clockwise around a supporting point 15a supported by the bed frame 1 and ascends.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanism for raising and lowering a bed floor plate, particularly to a crank handle-driven raising and lowering mechanism.

(Prior art) A push-up arm is provided on the underside of a floor board such as a back floor board or a lumbar floor board that is rotatably supported on a bed frame, and the push-up arm is moved by a moving member of a screw shaft type drive device to lift the floor board. In most of the conventional elevator mechanisms for a floor board that rotate and raise the floor board, a screw shaft is supported in the longitudinal direction of the bed frame due to the driving direction of the push-up arm. A crank handle for driving the rotation is provided on the footboard side.

However, depending on the conditions of the hospital room where the bed is installed,
It may be advantageous for the crank handle to be able to be driven laterally. Conventionally, in such cases, the screw shaft is supported in the longitudinal direction of the bed frame, but a crank handle is provided on the side, and a transmission mechanism using gears, chains, etc. is installed between the crank handle and the screw shaft. Connected through.

(Problems to be Solved by the Invention) In such a mechanism, due to the transmission mechanism, the end of the machine as a whole becomes large-scale, efficiency deteriorates, the required force increases, and the cost tends to increase. .

The present invention aims to solve this problem.

(Means for Solving the Problems) The configuration of the present invention for solving the above problems will be explained with reference to FIGS. 1 to 4 showing embodiments. , bed frame 1 and floorboard 2a
, 2b rotatably supports the floor plates 2a, 2b.
A push-up arm 3a, g3b is provided on the lower side of the bed frame 1 to rotatably support screw shafts 4a, 4b in the width direction of the bed frame 1, and crank handles 5a, 5b are fixed to the ends of the screw shafts 4a, 4b. The internal threads of the movable members 6a, 6b are screwed onto the threaded shafts 4a, 4b, and an operating shaft 7a is attached to the bed frame 1 adjacent to the threaded shafts 4a, 4b so as to be rotatable around a vertical axis. ,
7b, and in the lateral direction of the operating shafts 7a, 7b,
A pair of direction change links 8a, 8b; 9a, 9b are provided protrudingly, and one direction change link 8a, 8b is connected to a long groove 10a, 1
The operating pin 11a of the moving members 6a, 6b is connected to the moving member 6a, 6b via the
.

11b, and the direction changing link 9a on the other side.
, 9b and the push-up arms 3a, 3b, drive links 13a, 13b are connected via spherical bearings 12 provided at both ends, respectively.

In the above configuration, the crank handle 5a.

5b can be fixed not only to one side of the screw shafts 4a and 4b, but also to both ends. Also.

The grip portion 14 of the crank handles 5a, 5b can be folded freely.

(Operation and Examples) The operation of the present invention will be explained with reference to FIGS. 1 to 4 showing examples. First, in the state shown in FIGS. 3 and 4 (a) where the floorboard is supported in a horizontal state, for example, when one of the crank handles 5a in the figure is rotated in a predetermined direction to rotate the screw shaft 4a, The moving member 6a moves upward in FIG. 4(a) along the screw shaft 4a.

The other direction changing link 8a is rotated in the width direction of the bed frame 1 by driving the long groove 10a portion by the operating pin lla. The rotation of one direction-changing link 8a causes the operating shaft 7a to rotate counterclockwise, and the other direction-changing link 9a rotates in the longitudinal direction of the bed frame l. Due to the rotation of the direction changing link 9a on the other side, the drive link 13a is driven to the left, and the push-up arm 3a is moved to the left by being pushed by the drive link 13a.

Therefore, the floorboard 2a rotates clockwise around the fulcrum 15a supported by the bed frame 1 and rises. In addition, in the 0 or more movements in which the floor plate 2a can be lowered by rotating the crank handle 5a in the opposite direction, the direction changing link 9a on the other side is connected to the vertical axis, and the push-up arm 3a The drive link 13 connected between these rotates around the horizontal axis.
Since the spherical bearings 12a are provided at both ends, the drive force can be transmitted without any trouble.A is fixed to the end of the screw shaft 4a in the manner shown in 6 or above, and the bed frame 1
By rotating a crank handle 5a provided on the side surface of the floor plate 2a, the floor plate 2a can be rotated and raised. Since the crank handle 5a is thus fixed to the end of the screw shaft 1, no special transmission mechanism is required. Therefore, the crank handle 5a is connected to the screw shaft 1.
In addition to being fixed only on one side, it can also be easily fixed on both ends. Even if the crank handle 5a is provided on the side surface of the bed frame 1 in this way, by setting its position in the space below the floorboard 2a, or by making the grip part 14a freely foldable, it is possible to easily get on and off the floorboard 2a. etc. will not be a hindrance.

(Embodiment) Next, the embodiment shown in the figure will be described. In this embodiment, the floorboards are a back floorboard 2a, a waist floorboard 2b, and a foot floorboard 2.
It consists of c. The back floor plate 2a and the waist floor plate 2b are respectively fulcrums 15a.

It is supported on the bed frame 1 at a position 15b.

Although the specific structure of support at these fulcrums 15a and 15b is omitted in the figure, it goes without saying that they can be supported in any suitable structure. The back floor plate 2a and the lumbar floor plate 2b each constitute the mechanism of the present invention described above, and the foot floor plate 2c is supported by being connected to the lumbar floor plate 2b on one side. In the above operation section, the elevating mechanism for the back floor plate 2a has been described, but the elevating mechanism for the waist floor plate 2b also operates in the same manner. That is, when the crank handle 5b on the other side in FIGS. 3 and 4(b) is rotated in a predetermined direction to rotate the screw shaft 4b, the movable member 6b moves along the screw shaft 4b as shown in FIG. 4(b). ), the -blade side direction change link 8b is driven by the long groove 10b portion by the operating pin llb and rotates in the width direction of the bed frame 1. The rotation causes the actuating shaft 7b to rotate counterclockwise, and the direction changing link 9b on the other side rotates in the longitudinal direction of the bed frame 1. Due to the rotation of the direction changing link 9b on the other side, the drive link 13b is driven to the right, and the push-up arm 3b is moved to the right by being pulled by the drive link 13b.

Therefore, the lumbar floor plate 2b rotates counterclockwise around the fulcrum 15b supported by the bed frame 1 and rises.

As the waist floor plate 2b rotates and rises, one side of the foot floor plate 2c also rises, causing these floor plates 2b to rise.

2c is in a refracted state where the upper side is convex. Furthermore, by rotating the crank handle 5b in the opposite direction, the floor plate 2b can be lowered by performing the opposite operation. As described above, by operating the elevating mechanism for the back floor plate 2a and the waist floor plate 2b.

Only the back floor plate 2a can be raised, or at the same time, the waist floor plate 2b and the foot floor plate 2c can be raised. Of course, the present invention can also be applied only to the back floorboard 2a.

In the illustrated embodiment, the threaded shafts 4a, 4b are rotatably supported on the bed frame 1 by bearings 16 at both ends, and the threaded shafts 4a, 4b are
Operating shafts 7a and 7b are supported on the bed frame 1 adjacent to the bed frame 1, and the specific structure of these supporting parts is not shown in the drawings.

Of course, an appropriate support mechanism may also be applied.

The crank handles 5a and 5b have a wheel-like configuration, and have a grip portion 14 provided on the outside thereof so as to be bendable, and a storage groove 17 for storing the grip portion 14 when bent. Further, FIG. 2(b) shows the drive links 13a, 13
This figure shows an example of b, and as mentioned above, the spherical bearing portions 12 are provided at both ends. This spherical bearing part 12 includes an inner member 19 provided with a connecting shaft 18 and a drive link main body 20.
an outer member 21 connected to the inner member 19;
are configured to be able to rotate relative to the outer member 21 so that the connecting shafts 19 provided thereon are oriented in directions perpendicular to each other.

(Effects of the Invention) As described above, the present invention provides a pair of push-up arms provided on the operating shaft between the push-up arm provided on the underside of the floor plate rotatably supported on the bed frame and the movable member moved by the screw shaft. Since the direction conversion link and the drive link provided with spherical bearings at both ends are interposed, the screw shaft can be supported in the width direction of the bed frame, and the crank handle can therefore be fixed to the end of the screw shaft. Because of this, it can be easily installed on the side of the bed frame and does not require a transmission mechanism using gears, chains, etc. Therefore, the crank handle can be fixed not only to one side of the screw shaft, but also to both ends. This can be done easily and does not deteriorate efficiency, so the operating force does not increase and costs can be reduced. Furthermore, even if the crank handle is installed on the side of the bed frame in this way, by setting the crank handle in the space below the floorboard, or by making the grip part foldable, it may become a hindrance to getting on and off the floorboard. It has the effect of not being

[Brief explanation of drawings]

All of the figures show embodiments of the present invention, with FIG. 1 being a perspective view schematically illustrating the whole, and FIG. 2(a). (b) is an explanatory perspective view of the main part, and FIG. 3 (a). 4(b) and FIGS. 4(a) and 4(b) show the configuration as well as the operation, in which (a) is an explanatory side view, and FIG.
(b) is an explanatory plan view. Code 1...Bed frame, 2a, 2b, 2c...
Floor plate, 3a, 3b... push upper arm, 4a, 4b... screw shaft, 5a, 5b... crank handle, 6a. 6b... Moving member, 7a, 7b... Operating shaft, 8a,
8b; 9a, 9b one-way conversion link, 10a, 10b・
...Long groove, lla, llb...operating pin, 12...
Spherical bearing portion, 13a, 13b... Drive link, 14.
・Grip part, 15a, 15b...Fully point, 16...
bearing. 17... Storage groove, 18... Connection shaft, 19... Inner member. 20... Drive link body, 21... Outer member 6 Fig. ( ) 8 d 1tsu Fig. 3 ta) Fig. (al Fig. 3 (b) Fig. (b)

Claims (3)

[Claims] (1) A floor plate is rotatably supported on the bed frame, a push-up arm is provided on the underside of the floor plate, a screw shaft is rotatably supported in the width direction of the bed frame, and
fixing a crank handle to the end of the threaded shaft, screwing the female threaded portion of the movable member onto the threaded shaft;
An operating shaft is provided on the bed frame adjacent to the threaded shaft so as to be rotatable around a vertical axis, and a pair of direction changing links is provided protruding in the lateral direction of the operating shaft to change the direction on one side. The link is connected to the operating pin of the movable member via a long groove, and a drive link is connected between the direction conversion link on the other side and the pusher arm via spherical bearings provided at both ends, respectively. Lifting mechanism for the bed floor plate (2) The crank handle described in item 1 is a mechanism for raising and lowering a bed floor plate, characterized in that the crank handle is fixed to both ends of a screw shaft. (3) The crank handle described in item 2 is a bed floor board elevating mechanism characterized in that the grip portion is foldable.