JP2512862B2 - Bottom lifting mechanism in bed - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom raising / lowering mechanism for a bed, which has a simplified structure and is particularly applicable to an assembled home bed.

[0002]

2. Description of the Related Art In recent years, the ratio of elderly people in Japan has been increasing steadily, and the necessity of home care has become increasingly prominent. Therefore, the demand for home beds is increasing. Further, even in such a bed for home use, as in the case of an ordinary hospital bed, it has become more multifunctional and electrically operated, and a mechanism for electrically raising the back, raising the legs, and adjusting the elevation of the frame has come to be provided. By the way, since the bed for home use is used in a general household, it is desirable to use an assembly type bed. This is because when assembled, it is easy to pack and the size of the package can be reduced, so that it can be easily carried indoors.

[0003]

On the other hand, in the case of the assembling type, the assembling is troublesome and the assembling is performed while referring to the instruction manual, so that not only is it complicated, but also a tool is required depending on the assembling location. Often become. The time and effort of such assembling are further increased due to the multi-functionalization and electrification, which makes assembling even more difficult. Furthermore, the weight is increased due to the multi-functionalization and electrification, which is not preferable as a home bed. The present invention has been made in view of such a background, and an object of the present invention is to provide a bottom lifting mechanism for a bed, which has a simplified structure and is particularly applicable to an assembly type home bed.

[0004]

In order to solve the above-mentioned problems, the present invention is configured so that a frame in a bed can be divided into at least a head side frame and a leg side frame of the bed, and these head side and leg side frames are provided. , Providing an undulating leg member whose upper end is movably mounted along the frame, and connecting the middle portion of the undulating leg member to the head side and the leg side frame end side by an auxiliary stay to operate the undulating leg member. With the structure that assists in regulation, female screw members are installed near the upper ends of these undulating leg members, and screw shafts are respectively screwed into these female screws to drive the screw shaft to either one of the screw shafts. The means is connected, and these screw shafts are connected so as to be interlocked.

[0005]

Since the undulating leg members on both the head-side and leg-side frames and the auxiliary stay are interlocked by one driving means, the mechanism can be simplified. Further, when the screw shaft is separately formed on the head side and the leg side and the screw shafts are connected to each other in an intermittent manner, the present mechanism is applied to a bed in which the frame is divided into at least the head side and the leg side frames. be able to.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a bottom lifting mechanism in a bed according to the present invention will be described below with reference to the accompanying drawings with reference to an embodiment. FIG. 1 shows an assembling type home bed 1. In this bed 1, the frame 2 is divided into three parts, the headboard 3 and the footboard 4 are detachably attached to the frame 2, and the bottom 5 is divided, and the back raising mechanism and knee raising mechanism (not shown) raise the back and knees. It is configured to raise. The three-divided frame 2 is composed of a head-side frame 2a to which the headboard 3 is attached, a frame 2b located at the center and corresponding to the waist, and a leg-side frame 2c to which the footboard 4 is attached. There is. The frame 2b located in the central portion has a head-side frame 2a and a leg-side frame 2 at both ends.
It is configured so that it is inserted into c and connected (see FIG. 2).

In the frame 2, the head side frame 2a and the leg side frame 2c of the bed 1 are moved at their upper ends via rollers 8 and 9 along guide rails 6 and 7 provided on the frames 2a and 2c, respectively. The undulating leg members 10 and 11 are mounted so that
1 middle part and head side frame 2a and leg side frame 2c
The ends are connected to each other by auxiliary stays 12 and 13, so that the movement of the undulating leg members 10 and 11 is supplementarily restricted.

Screw members 14 and 15 are attached to portions of the undulating leg members 10 and 11 close to the guide rails 6 and 7, respectively, because they are threaded in the opposite directions, and screw shafts 16 and 17 are screwed and mounted, respectively. Has been done. These screw shafts 16 and 17 are connected to the connecting pipes 18 and 19 and the connecting rod 2
By linking 0s, they can be linked. And, at the end of the screw shaft 16 on the head side frame 2a side,
A motor 21 which is a driving means of the screw shafts 16 and 17 is connected.

Next, the connecting rod 20 and the connecting rod 20 which are means for connecting the screw shafts 16 and 17 will be described in more detail. That is, the screw shaft 1
As shown in FIG. 3, the connecting pipes 18 and 19 are fitted into the ends 6 and 17 of the connecting pipes 18 and 19 and fixed by pin members 22 and 23. And these connecting pipes 18, 19
Both ends of the connecting rod 20 are respectively inserted into and are fixed by the retaining means 24. The connecting pipe 1
The inner surfaces of 8 and 19 are hexagonal, while the connecting rod 2
0 has a hexagonal outer periphery. Further, the connecting pipe 18 is formed with a cut groove 25 for locking the retaining means 24. The connecting rod 20 to be inserted into the connecting pipe 18 is provided with a constricted portion 26 whose diameter is smaller than the diameter of the connecting rod 20 at other positions (see FIG. 4). The retaining means 24 is the connecting pipe 1.
It is composed of a stopper shaft 27 that engages with the constricted portion 26 of the connecting rod 20 via 8 and a loop-shaped coil spring 28 connected to both ends of the stopper shaft 27 (see FIG. 5).

When assembling the bed 1 having the bottom elevating mechanism having the above-described structure, first, both ends of the frame 2b located at the center are respectively attached to the head side frame 2a.
, And is inserted and connected to the leg side frame 2c. Next, a screw shaft 16 for driving the undulating leg members 10 and 11 on the head side frame 2a and the leg side frame 2c side,
17 are connected by a connecting rod 20. At this time, both ends of the connecting rod 20 are inserted into the connecting pipes 18 and 19 at opposite ends of the screw shafts 16 and 17, respectively, and fixed by the retaining means 24. That is, the connecting rod 20 inserted in the connecting pipe 18 is connected to the connecting pipe 1.
It can be fixed by engaging with the constricted portion 26 of the connecting rod 20 via the stopper shaft 27 by the spring force of the loop-shaped coil spring 28 via 8. Then, the headboard 3, the footboard 4, and the bottom 5 are mounted, and the assembly is completed. Since the bed 1 can be assembled in this way, no tools are required.

Next, the operation of the bottom lifting mechanism will be described.
When the motor 21 is activated, the screw shaft 16 of the head-side frame 2a rotates, and this rotational force is transmitted via the connecting rod 20.
It is transmitted to the screw shaft 17 of the leg side frame 2c and rotates in the same direction. Since the screw shafts 16 and 17 employ reverse threads to each other, the female screw members 14 and 15 move on the screw shafts 16 and 17 so as to move away from each other or approach each other. As a result, the undulating leg members 10, 11
The upper ends of the guide rails 6 and 7 of the frames 2a and 2c.
Along with the rollers 8 and 9 to move away from each other or to approach each other, and by the auxiliary restricting action of the auxiliary stays 12 and 13, the hoisting leg members 10 and 11 perform hoisting motion and the bottom 5
Can be raised and lowered (see FIGS. 1 and 6).

As described above, the bottom lifting mechanism is
The hoisting leg members 10 and 11 and the auxiliary stays 12 and 13 on both the head-side and leg-side frames 2a and 2c are connected to one motor 2
Since it is configured to be linked by 1, the mechanism can be simplified. Further, when the screw shafts 16 and 17 for driving the undulating leg members 10 and 11 on the head-side frame 2a and the leg-side frame 2c side are connected by the connecting rod 20, it is also applicable to an assembling type home bed. can do. Further, no tools are required for assembling, which facilitates the assembling work.

[0013]

As described above, according to the present invention, since the undulating leg members on both the head-side and leg-side frames and the auxiliary stay are interlocked by one driving means, the mechanism can be simplified. Is. Further, since the screw shafts constituting the bottom elevating mechanism are separately formed on the head side and the leg side, and the screw shafts are respectively connected so as to be able to be intermittently connected, the frame is divided into at least the head side and the leg side frames. Since this mechanism can be applied to a bed, the mechanism is particularly suitable for a home bed.

[0014]

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a bed to which a bottom lifting mechanism according to the present invention is applied.

FIG. 2 is an exploded side view showing the structure of the bed shown in FIG.

FIG. 3 is an enlarged cross-sectional explanatory view showing a connecting structure of a screw shaft that constitutes the bottom lifting mechanism shown in FIGS. 1 and 2.

FIG. 4 is an explanatory perspective view of a main part configuration showing details of the connection structure shown in FIG. 3;

FIG. 5 is an exploded view of an essential part of the connection structure shown in FIG.

FIG. 6 is a schematic side view showing a state in which the bottom lifting mechanism according to the present invention is activated to lower the bottom.

[Explanation of symbols]

1 Bed 2, 2a-2c Frame 3 Headboard 4 Footboard 5 Bottom 6, 7 Guide rails 8, 9 Rollers 10, 11 Elevating leg members 12, 13 Auxiliary stays 14, 15 Female screw members 16, 17 Screw shafts 18, 19 Connection pipe 20 Connection rod 21 Motor 22, 23 Pin member 24 Stopping means 25 Cut groove 26 Constricted portion 27 Stopper shaft 28 Loop coil spring

Claims (1)

(57) [Claims] 1. A frame in a bed is configured to be divided into at least head-side and leg-side frames of the bed,
These head-side and leg-side frames are provided with undulating leg members whose upper ends are movably mounted along the frame,
The intermediate portion of the undulating leg member is connected to the head side and the leg side frame end side by an auxiliary stay to restrict and assist the movement of the undulating leg member. It is characterized in that a screw member is mounted, screw shafts are respectively screwed into these female screws, one of the screw shafts is connected to a drive means of the screw shaft, and the screw shafts are connected so as to be interlockable. Bottom lifting mechanism in the bed.