JPH0817795B2 - Lifting mechanism for beds - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting mechanism for a bed or the like in which a floor is vertically movable.

[0002]

2. Description of the Related Art Conventionally, a bed or the like has been provided with a floor undulation adjusting mechanism having various functions so as to be used for the convenience of treatment, medical treatment and nursing. Of the floor undulation adjustment mechanism,
The floor elevating mechanism for vertically elevating the floor has great advantages for patients, doctors, and caregivers in terms of treatment, medical treatment, and nursing.

[0003]

However, if the above-mentioned floor raising / lowering mechanism is provided in addition to the usual floor undulation adjusting mechanism, the space around the floor below is occupied by these mechanisms. And there is almost no extra space. The present invention has been made to solve such problems, and an object of the present invention is to provide a lifting mechanism for a bed or the like that can provide a space below the floor.

[0004]

In order to solve the above-mentioned problems, according to the present invention, in a bed or the like having a base frame and telescopic legs mounted near both ends of the base frame, a drive means is provided at the center of the lower surface of the base frame. And first and second drive arms which are simultaneously displaced in opposite directions by the drive means, and the L-shaped first and second driven members are rotated at positions close to the telescopic legs. The first and second driven members are movably attached to each other, and one of the first and second driven members is connected to the first and second drive arms by an interlocking rod, while the other of the first and second driven members is extended and contracted. It is configured to connect to the legs. In the above-mentioned structure, the drive means is
It has a reduction gear mechanism connected to the motor and the motor output shaft, and a bulk gear mechanism, and this bulk gear mechanism is driven by the output extracted through the reduction gear mechanism, and is driven by the drive bulk gear and is meshed with the drive bulk gear. The first and second driven bulk gears are combined, and the first and second drive arms are connected to the output shafts of the first and second driven bulk gears.

[0005]

When the drive means is activated, the first and second drive arms are
In conjunction with each other, they are simultaneously displaced, and the interlocking rods are interlocked with each other. Then, the first and second driven members are displaced in mutually opposite directions, and the other interlocking arm is displaced. As a result, the telescopic legs can be telescopically operated to raise and lower the base frame.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an elevating mechanism for a bed or the like according to the present invention will be described below with reference to the accompanying drawings with reference to an embodiment. FIG. 1 shows a bed 1, which has a structure in which telescopic legs 3 are attached near both ends of a base frame 2, and an elevating mechanism 4 for driving the telescopic legs 3 to extend and retract is provided. The extendable leg 3 has an outer leg 3a and an inner leg 3b configured to be movable back and forth in the outer leg 3a. The outer leg 3a is a hollow frame body and is directly attached to the base frame 2. Further, the outer leg 3a is formed with a slit 5 along the central axis line, and when the inner leg 3b is driven to move back and forth by an elevating mechanism 4 which will be described later, the connecting portion between the elevating mechanism 4 and the inner leg 3b is the slit 5. To be able to move.

The elevating mechanism 4 is provided with a driving means 6 provided on the lower surface of the base frame 2 and first and second driving arms 7 and 8 which are simultaneously displaced by the driving means 6 in opposite directions.
Have and. Further, the L-shaped first and second driven members 1 are provided on the support member 9 which is provided so as to project at a position close to the telescopic leg 3.
0 and 11 are rotatably attached, and the shorter interlocking arms 10S and 11S of the first and second driven members 10 and 11 and the first and second drive arms 7 and 8 are interlocked with rods 12 and 13. While connecting, the longer interlocking arms 10L and 11L of the first and second driven members 10 and 11 are connected to the inner leg 3b of the telescopic leg 3.
It is configured to be connected to. The interlocking arms 10L, 11L
An elongated hole 14 is formed at the tip end of the elongated hole 14, and a connecting shaft 15 provided on the inner leg 3b allows the elongated hole 14 to move freely. When the first and second driven members 10 and 11 rotate, a support member is formed. This is adapted so that the distance between the attachment position of the inner leg 3b and the connecting shaft 15 of the inner leg 3b changes.

As shown in FIG. 2, the driving means 6 includes a motor 16 and a reduction mechanism 17 connected to an output shaft of the motor 16.
And a bulk gear mechanism 18. The sprocket gear mechanism 18 includes a drive sprocket gear 18 a that is rotationally driven by an output that is taken out through the reduction gear mechanism 17, and a drive sprocket gear 1.
8a, the first and second driven bulk gears 18b, 1
And 8c. The aforementioned first and second drive arms 7 and 8 are connected to the output shafts of the first and second driven bulk gears 18b and 18c.

Next, the operation of the lifting mechanism 4 in the bed 1 as described above will be described. When the motor 16 is started, the drive bulk gear 18a is rotated by the rotational force taken out through the reduction mechanism 17, and the first and second driven bulk gears 18b, 18 are rotated.
Rotate c. At this time, the first and second driven bulk gears 18
Since b and 18c reversely rotate at the same angle, the first and second drive arms 7 and 8 are displaced in the opposite directions and at the same time, and the first and second driven members are moved through the interlocking rods 12 and 13. 1
0 and 11 are displaced in opposite directions, and interlocking arms 10L and 1
1L is displaced to drive the inner leg 3b of the telescopic leg 3 forward and backward from within the outer leg 3a (see FIGS. 3, 4, and 5), and the base frame 2 can be moved up and down. When the first and second driven members 10 and 11 rotate, the interlocking arms 10L and 11L
The connecting shaft 15 which is a connecting point between the inner leg 3b and the inner leg 3b is
The slit 5 of the outer leg 3a is moved while floating in the elongated holes 14 at the ends of 0L and 11L. Therefore, when the first and second driven members 10 and 11 rotate, it is possible to cope with a change in the distance between the attachment position of the support member 9 and the connecting shaft 15 of the inner leg 3b.

As described above, the lifting mechanism 4 in this embodiment
Mounts the drive means 6 on the lower surface of the center of the base frame 2,
It is configured to be dynamically connected to the telescopic legs 3 near both ends of the base frame 2 via the first and second drive arms 7 and 8, the interlocking rods 12 and 13, the first and second driven members 10 and 11. , A space is provided below the base frame 2,
When sideways mounting other treatment equipment or a wheelchair, the leg does not hit the lifting mechanism as in the conventional case. In addition, a cleaning tool or the like can be inserted up to the central floor surface below the base frame 2, which also has the effect of facilitating cleaning.

[0011]

As described above, according to the present invention, since the central space is open, it is easy to use the lift. Since the user can pull out his / her feet when getting out of the bed, the center of gravity is small and the user can stand up relatively easily.

[0012]

[Brief description of drawings]

FIG. 1 is a side view of a bed to which a lifting mechanism according to the present invention is applied.

FIG. 2 is a structural explanatory view showing an example of driving means of the lifting mechanism shown in FIG.

FIG. 3 is an explanatory view showing the operation of the telescopic legs in the bed or the like according to the present invention.

FIG. 4 is an explanatory view showing the operation of the telescopic legs in the bed or the like according to the present invention.

FIG. 5 is an explanatory view showing the operation of the telescopic legs in the bed or the like according to the present invention.

[Explanation of symbols]

 1 bed 2 base frame 3 telescopic leg 3a outer leg 3b inner leg 4 lifting mechanism 5 slit 6 driving means 7 first driving arm 8 second driving arm 9 support member 10 first driven member 11 second driven member 10S, 11S interlocking arm 10L, 11L Interlocking arms 12, 13 Interlocking rod 14 Elongated hole 15 Connecting shaft 16 Motor 17 Reduction gear mechanism 18 Bulk gear mechanism 18a Drive bulk gear 18b, 18c First and second driven bulk gears

Claims (2)

[Claims] 1. In a bed or the like having a base frame and telescopic legs mounted near both ends of the base frame, drive means is provided in the center of the lower surface of the base frame, and the drive means simultaneously displaces in opposite directions at the same time. , A second drive arm is provided, and first and second L-shaped driven members are rotatably attached at positions close to the telescopic legs. One interlocking arm of the first and second driven members is provided. And the first and second drive arms are connected by an interlocking rod, while the other interlocking arm of the first and second driven members is connected to the telescopic leg. 2. The drive means according to claim 1 has a motor and a speed reduction mechanism connected to the motor output shaft, and a bulk gear mechanism, and the bulk gear mechanism outputs the power taken out through the speed reduction mechanism. And a first driven second bulkhead gear meshing with the driven bulkhead gear. The first and second driven arms are attached to the output shafts of the first and second driven bulkhead gears. An elevating mechanism for a bed or the like, which is configured to connect the