JPH035320Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a bed that is optimal for Japanese-style rooms.

BACKGROUND TECHNOLOGY Conventionally, there is a stationary bed with supporting legs that has a function of raising the upper body in a lying position by rotating the back frame that supports the upper body.

This type of bed works in conjunction with the standing rotation of the back frame, because when the upper body side rises due to the standing rotation of the back frame, the body is pushed forward and the position of the buttocks moves forward. It has a device that raises the cushion frame side and prevents the butt from shifting. For such known examples, please refer to Utility Model Application Publication No. 193826/1982 and Publication No. 61233 of 1988.

The functional bed with this structure is of an interlocking type in which the front end of the cushion frame side rises in conjunction with the upright rotation of the back frame, so either the back frame or the cushion frame can be selected and moved. In addition, the structure becomes complicated because it is linked, and
Once a malfunction occurs, the entire device must be inspected, and when the above-mentioned fixed-type bed is used in a general home, it is difficult to get in the way when not in use, since it is a Japanese-style room that can be used for multiple purposes. It is not suitable for sitting next to the patient, and the lying position is higher than the eye level of the family sitting on the tatami, making it difficult for the sick person to feel secure.

Purpose of the invention Therefore, this invention has the function of preventing buttocks from shifting, provides independent movement of the cushion frame and back frame, and improves maintenance. The present invention provides a bed that can be used in the room and can be folded when not in use.

Structure of the invention In order to achieve the above object, in this invention, a cushion frame on the lower body side and a back frame on the upper body side are rotatably supported with respect to a fixed frame, and the cushion frame on the lower body side and the cushion frame are supported rotatably with respect to a fixed frame. A back frame drive device and a cushion frame drive device for independently raising and rotating the frame sides are respectively disposed on both sides of the fixed frame, and a rotating hinge portion on the back frame side that can rotate only forward. The configuration includes the following.

Embodiment Hereinafter, an embodiment of this invention will be described in detail with reference to the drawings of FIGS. 1 to 7.

In the figure, reference numeral 1 indicates a fixed frame that can be placed directly on the tatami mat, and the fixed frame 1 includes a back frame 3 on the upper body side rotatably supported via brackets 7, 7; A cushion frame 5 is mounted, which is supported by the fixed frame 1 by a connecting shaft 21 and whose distal end 5a rises about the bent portion 8 as a fulcrum.

The bracket 7 consists of a fixed bracket 7a and a movable bracket 7b, with the fixed bracket 7a fixed to the side of the fixed frame 1, and the movable bracket 7b fixed to the back frame 3, respectively. The rotation shafts 9, 9 of the bracket 7 extend through the fixed frame 1 and are fixed to the proximal end of the cushion frame 5.

The fixed frame 1 is set to have almost the same length as the cushion frame 5, and on both sides of the fixed frame 1 there are back frame drives for independently raising and rotating the back frame 3 side and the cushion frame 5 side. A device 11 and a cushion frame drive device 13 are provided.

The back frame drive device 11 is fixed to one fixed bracket 7a and presses a push button _S1 of a hand switch S.
For example, a motor M that can rotate forward in one press and reverse in two presses, a reducer 15 that decelerates and extracts the rotational power of the motor M, and transmits the power from the reducer 15 to the movable bracket 7b. The first gear _T1 of the small gear of the transmission gear group T is fixed to the mounting shaft 17 of the reducer 15, and this first gear
A second gear T ₂ of a large gear meshing with T ₁ is fixed to the connecting shaft 9 . Further, the fourth gear _T4 is composed of an internal gear formed on the fixed bracket 7a and a third gear _T3 formed on the movable bracket _7b , which is an external gear that meshes with a part of the internal gear T4. There is. The number of teeth of the _third gear T3 is at least one less than the number of teeth of the fourth gear _T4 , and its cutting edge circle diameter is smaller than the cutting edge circle diameter of the fourth gear _T4 by at least the total tooth height. ing. And these third gears
A concentric shaft portion 9a and an eccentric shaft portion 9a formed on the connecting shaft 9 are rotatably inserted through the centers of the fourth gear T ₃ and the fourth gear T ₄ . The first gear T ₁ is attached to the take-out shaft 17 of the reduction gear 15, and the second gear T ₂ and the third gear T ₃ are attached to the connecting shaft 9, respectively. Therefore, these transmission gear groups also form a speed reduction mechanism. This allows the back frame 3 to stand up and rotate with the power of the motor M, but the maximum upright angle θ of the back frame 3 at this time is set to about 80 degrees. Further, the motor M is controlled by a motor circuit which is turned off by a micro switch or the like when the back frame 3 stands up and rotates about 80 degrees. The connecting shaft 9 on the motor M side also serves as the rotation shaft 9 of the bracket 7.

The cushion frame drive device 13 includes a motor _M1 which is fixed to the other fixed bracket 7a and can rotate forward or reverse depending on the number of times a push button _S2 of a hand switch S is pressed.
It consists of a reducer 25 that decelerates and extracts the rotational power of the motor _M1 , and a transmission gear group that transmits the power from the reducer 25 to the movable bracket 19, and the first gear _W1 of the pinion of the transmission gear group W. is fixed to the take-out shaft 27 of the reduction gear 25, and the second gear _W2 meshing with the first gear _W1 is fixed to the connecting shaft 21.
Further, the fourth gear _W4 is composed of an internal gear formed on the fixed bracket 23 and _a third gear _W3 formed on the movable bracket 19, which is an external gear that meshes with a part of the internal gear W4. There is. The number of teeth of the _third gear W3 is at least one tooth less than the number of teeth of the fourth gear _W4 , and its cutting edge circle diameter is smaller than the cutting edge circle diameter of the fourth gear _W4 by at least the total tooth height. There is. A concentric shaft portion 21a formed on the connecting shaft 21 is located at the center of the third gear _W3 and the fourth gear _W4 .
The eccentric shaft portion 9b is rotatably inserted therethrough. The first gear W ₁ is attached to the take-out shaft 27 of the reducer 25, and the second gear W ₂ and the third gear W ₃ are attached to the connecting shaft 21, respectively. Therefore, these transmission gear groups also form a speed reduction mechanism. As a result, the cushion frame 5 can be erected and rotated by the power of the motor _M1 , but the maximum erected angle of the cushioned frame 5 at this time is a desired erected angle α that can prevent hip displacement.
The rising angle α is set so that when the cushion frame 5 reaches a desired rising angle, a positioning micro switch or the like operates to turn off the motor _M1 .

On the other hand, an air bag 29 is arranged in the width direction of the cushion frame 5. air bag 29
is in communication with an air pump P controlled by a push button _S4 of a hand switch S via a control valve 31, and the air pump P and control valve 31 are mounted on the fixed frame 1. As a result, air from the air pump P is supplied into the air bag 29 by switching the control valve 31, and the mat 33 expands as shown in FIG.
It is possible to take a standing posture with the upper body side bent through the knees.

Further, the back frame 3 is provided with a pivot hinge portion 35 that can pivot only forward. The reference numeral 37 is a fall prevention member that moves the pivot point backward when the back frame 3 is rotated to stand up, thereby preventing it from falling backward, and is extendable and retractable with respect to the storage cylinder 39. Further, 41 indicates a wire mesh.

The bed constructed in this manner can be used as a normal bed when the cushion frame 5 and back frame 3 are in a horizontal state. In this case, since the bed can be placed directly on the tatami mat, the bed can be placed at the eye level of the family member when seated.

Next, by selecting push buttons S ₁ and S ₂ of the hand switch S, the motor M is rotated forward, for example, and the back frame 3 is rotated upright. As a result, the upper body is maintained in the desired standing posture (see FIG. 4), and the back frame 3 returns to its original horizontal state by reversing the rotation of the motor M. Next, the front end side 5a of the cushion frame ₅ is raised by a predetermined amount as shown in FIG. back frame 3
By rotating the torso to the maximum standing angle θ, the upper body can be maintained in an upright position without shifting the buttocks.
Thereafter, by reversing the motors M and _M1 , the cushion frame 5 and the back frame 3 return to their original horizontal state. On the other hand, if a failure occurs, repair can be completed by inspecting only the drive unit on the side where the failure occurred.
Further, when not in use, the back frame 3 can be folded into two by pivoting about the pivot hinge portion 35 as shown in FIG.

Note that the motor _M1 of the cushion frame drive device 13 and the motor M of the back frame drive device 11
can also be driven at the same time by push button _S3 of the hand switch S. In this case, the motor circuit is such that the motor _M1 of the cushion frame drive device 13 operates first, and at the same time the rotation of the cushion frame 5 is completed, the motor M of the back frame drive device 11 operates subsequently. is desirable.

Effects of the invention As explained above, according to this invention, the cushion frame and the back frame can be operated independently, so that the desired posture can be set.
Further, since the cushion frame drive device and the back frame drive device only have a single function of raising and rotating the cushion frame and the back frame, the structure is simple and failures are less likely to occur. In addition, when lying down, the height is the same as that of a normal pinerest, giving a sense of security even to elderly people who are not used to the bed. What's more, when not in use, you can fold it in half and store it in a room for multiple purposes. Since the back frame is structured so that it is placed separately, when the back frame is rotated upright and folded, the overall shape of the frame becomes approximately U-shaped, and it can be folded with the cushion pad still placed on the bed. You can carry it around.

Further, the back frame drive device is disposed between the side of the fixed frame and the side of the back frame, and the cushion frame drive device is disposed between the side of the fixed frame and the side of the cushion frame. Since the structure is such that there are no protrusions above or within the frame, the user does not feel a foreign body sensation in his or her body.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the bed of this invention, Fig. 2 is a partially cutaway plan view of the back frame drive device, Fig. 3 is a partially cutaway plan view of the cushion frame drive device, Figs. 5, 6, and 7 are operation explanatory diagrams showing the movements of the back frame and the cushion frame. Explanation of the symbols representing the main parts of the drawing, 1...
Fixed frame, 3...Back frame, 5...Cushion frame, 11...Back frame drive device, 13...Cushion frame drive device, 3
5...Rotating hinge part.

Claims (1)

[Scope of utility model registration request] A cushion frame on the lower body side and a back frame on the upper body side are rotatably supported with respect to a fixed frame, and a first fixed bracket is fixed to the fixed frame, and a first movable bracket is fixed to the back frame. and a power transmission device for rotating the first movable bracket, which is disposed between the fixed frame side and the back frame side, and a second fixed frame fixed to the fixed frame. A cushion frame drive device consisting of a bracket, a second movable bracket fixed to the cushion frame, and a power transmission device for rotating the second movable bracket is mounted on the side of the fixed frame and on the side of the cushion frame. The back frame drive device and the cushion frame drive device can be operated independently or simultaneously. The bed is rotatable in the opposite direction, and the bed is restricted at the rear by contact between the back frame and the lower plate.