JPH0331463B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bed, particularly to a rehabilitation bed suitable for training in standing up and walking, defecation, etc.

(Prior art) Conventionally, when people get up from bed and try to walk on the floor, they have to move their hips to the side of the bed before they can put their feet on the floor. I couldn't do it.

Especially for patients who require rehabilitation training.
The movement of the lower back is not only a great burden, but also
This type of bed was extremely inconvenient for defecation.

In order to eliminate this inconvenience, the leg part of the bed lowers than before, allowing the patient to raise himself up from a sitting position without shifting his body, and then stand up on the lowered part or sit down. A bed that is convenient for defecating in the state has been developed.

(Problem to be solved by the invention) However, even in this type of improved bed, the height of the descending part where the feet are attached is not the same as the floor surface and there is a step, so when trying to practice walking, However, the obstacles caused by this step made it impossible to move forward, and the footing was unstable because the person had to walk on the descending bed at first, so the problem was that it was not useful for walking training.

The present invention was made in order to solve the above-mentioned conventional problems, and it is possible to easily put the feet on the floor while sitting on the bed, and walk forward without any obstacles. I can train,
To provide a bed that allows defecation in a comfortable posture.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention configures a lower mattress that holds the legs of a human body to be divided into two parts in the left and right direction of the bed, and each of the lower mattresses that are divided into two parts. is supported by two descending openings, and the two descending openings are supported by a parallel link mechanism that allows the bed to move up and down while maintaining a horizontal state and at the same time move the bed left and right. It is structured as follows.

(Function) When the parallel link mechanism is operated, the descending portion of the lower mattress descends below the bed. At this time, the parallel link mechanism maintains the descending portion in a horizontal state. As the bed descends below, the opening portion moves toward the side frame of the bed, and as a result, the floor surface below the bed is exposed.

(Example) Next, an example of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 designates a main frame made of, for example, an L-shaped angle member in cross section, and this main frame 1 is disposed on the left and right sides of the bed. The rear end (head side) of the main frame 1 is integrally connected to a headboard 2, and the intermediate part is integrally connected to a connecting frame 3.

An auxiliary frame 4 made of, for example, a square pipe is arranged in parallel below the frame 1. Leg plates 5 are attached to the front ends (leg sides) of the main frame 1 and the auxiliary frame 4.

6 indicates a pine tress, and this pine tress 6 is
It is raised from a horizontal position as shown in the figure by a conventionally known actuating means (not shown), and functions as a backrest when the upper body of a human body (patient) is raised.

The central portion 6' of the upper mattress 6, which supports the patient's lower back, is preferably removed during defecation to accommodate a toilet bowl.

The lower mattress 7 that supports the patient's legs is divided into left and right movable mattresses 7a, 7a.

FIG. 3 is a diagram showing the operating mechanism with the movable mattresses 7a, 7a removed, and basically consists of a parallel link mechanism 8 and a lowering mechanism that opens to the left and right while descending due to the action of the parallel link mechanism 8. It consists of section 9.

As is clear from FIG. 4, the parallel link mechanism 8 is composed of two parallel links 8a and 8b, and an operating piece 8e connected to the tips of these links by pin joints 8c and 8d. The base end of the parallel link 8a is fixed to the rotary drive shaft 10, and the base end of the parallel link 8b is pivotally connected to the main frame 1 etc. by a pivot pin 8f. The rotation drive shaft 10 is also rotatably attached to the main frame 1 or the like. Furthermore, the parallel link 8
The lengths a and 8b, that is, the distance between the pin joint 8c and the rotary drive shaft 10, and the distance between the pin joint 8d and the pivot pin 8f are equal, and the lengths of the rotary drive shaft 10 are equal.
and the distances between both pin joints 8c and 8d are equal, forming a parallelogram link mechanism as a whole.

Therefore, when the rotary drive shaft 10 is rotationally driven, the actuating piece 8e moves from the solid line state to the imaginary line state while maintaining its posture, so that it becomes integral with the actuating piece 8e. The lower opening part 9 also moves to open left and right while descending while maintaining a horizontal state as shown in the figure.

As is clear from FIG. 4, the parallel link 8b is bent into a trapezoidal shape.
It is designed so that it does not interfere with the auxiliary frame 4 when it rotates downward.

FIG. 5 shows the drive mechanism of the rotary drive shaft 10, and shows the output shaft 11a of the electric motor 11.
A left and right screw shaft 12 is connected to the left and right screw shafts 12 via a joint 11b.

The left and right threaded shafts 12 are symmetrically threaded in opposite directions, and the movers 13 are screwed into each shaft. The mover 13 is pin-coupled to an operating piece 15 fixed to the rotary drive shaft 10 via a connecting rod 14 .

Therefore, when the electric motor 11 is operated, the left and right screw shafts 12 rotate, and along with this, the mover 13
move toward or away from each other along the left and right screw shafts 12. When the slider 13 moves, the rotary drive shaft 10 rotates via the connecting rod 14 and the operating rod 15, and as shown in FIG. 4, the parallel link mechanism 8 is activated.

FIG. 6 shows another embodiment for rotationally driving the rotary drive shaft 10, in which, for example, a disc 17 is rotated by a hydraulic jack 16, and the connecting rod 14 is pivotally attached to the disc 17. , the rotary drive shaft 10 is rotationally driven via the operating piece 15.

FIG. 7 shows yet another embodiment for rotationally driving the rotary drive shaft 10, in which a wire 18 is tied to the actuating piece 15, and the wire 18 is passed through an intermediate pulley 19 to a take-up pulley 20. It is designed to be rolled up. The take-up pulley 20 is rotated by a handle 21. Note that in this embodiment, the rotary drive shaft 10 is
is always biased in a rotational direction that pulls the wire 18, so simply by loosening the handle 21, the movable mattress 7a can be lowered and opened left and right.

FIG. 8 shows another embodiment of the parallel link mechanism 8, in which the base end of the parallel link 8a is simply pivotally connected to the main frame 1 by a pivot pin 22, and the base end of the parallel link 8a is simply pivoted to the main frame 1. Attach the engagement pin 23. A push rod 24 is attached to the rotary drive shaft 10 to support the engagement pin 23 so as to press it against it from below.

In the above embodiment, as shown in FIG. 9, the movable mattress 7a is lowered and opened, but the present invention is not limited to this. For example, as shown in FIG. 7
The outer pinerest 7a' of a may remain fixed, and only the inner pinerest 7a'' may be lowered and opened.In this case, each pinetress 7a', 7
The width of a″ can be set freely.

In addition, in Fig. 1, 25 is a handrail,
It protrudes inward from the left and right main frames 1,
When you stand up and start walking, you hold onto this to keep your body stable. This handrail 25 is designed to be removable.

(Effects of the Invention) A lower mattress that holds the legs of a human body is divided into two in the left and right direction of the bed, and each of the lower mattresses that are divided into two is supported by a descending portion,
Since this lowering part is lowered in a horizontal state using a parallel link mechanism, the patient can easily lower the lower part while resting on the lower pine rest on the lowering part without having to lift his/her legs. No burden on the patient. Moreover, at the same time as it descends, the lower pinerest moves to the left and right of the bed, and as a result,
Since the floor surface below the bed is exposed, the patient can put his or her feet on the floor surface under the bed while sitting on the upper mattress, and can easily transition to exercises such as standing up.

Further, since the lowering part is held by a parallel link mechanism, the structure has high structural strength and can be constructed compactly.

[Brief explanation of the drawing]

Fig. 1 is an external view showing an embodiment of the bed of the present invention, Fig. 2 is a plan view showing the main parts of the mechanism, Fig. 3 is a perspective view of the main parts of the mechanism, and Fig. 4 is a parallel link mechanism and lowering/lowering mechanism. FIG. 5 is an explanatory diagram of the operation of the drive mechanism. FIGS. 6 and 7 are explanatory diagrams of the operation of different embodiments of the drive mechanism. FIG. 8 is an explanatory diagram of the parallel link mechanism and the lowering part. An operation explanatory diagram showing another embodiment of
FIG. 9 and FIG. 10 are operation explanatory views showing the movement of the movable mattress, respectively. 1...Main frame, 2...Headboard, 3...
...Connection frame, 4...Auxiliary frame, 5...Legs, 6...Upper pine tress, 6'...Central part, 7
...Lower pine tress, 7a...Movable pine tress,
7a'...Outer pine tress, 7a''...Inner pine tress, 8...Parallel link mechanism, 8a, 8b...
Parallel link, 8c, 8d...Pin joint, 8e...
Actuation piece, 8f... Pivot pin, 9... Lowering part, 10
... Rotation drive shaft, 11 ... Electric motor, 11a
... Output shaft, 11b ... Joint, 12 ... Left and right screw shaft, 13 ... Mover, 14 ... Connection rod, 15 ...
Operating piece, 16... Hydraulic jack, 17... Disk,
18...Wire, 19...Intermediate pulley, 20...
... Take-up pulley, 21 ... Handle, 22 ... Pivot pin, 23 ... Engagement pin, 24 ... Push-up rod, 25
……handrail.

Claims (1)

[Claims] 1. The lower mattress that holds the legs of the human body is divided into two parts in the left and right direction of the bed, and each of the two divided lower mattresses is supported by two lowering parts. A bed characterized in that it is supported by a parallel link mechanism that allows the bed to move up and down as well as move left and right while maintaining a horizontal state.