JPH0340184Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a mechanism for rotating and lowering the floorboard of a bed or the like.

(Prior art and its problems) In a bed or the like, a floor plate, such as a back floor plate, whose one end is rotatably supported on a floor plate support frame, is gradually and continuously moved using a rotational drive source such as an electric motor. In all conventional mechanisms for rotating and raising, it is not possible to reduce the vertical width occupied by the mechanism members as a whole, and the thickness of the bed as a whole becomes thick, making it difficult to use in general homes, etc. It was not suitable for

For example, FIG. 4 shows an example of a conventional mechanism, in which a floor plate support frame b that rotatably supports one end of a back floor plate a is screwed in a direction perpendicular to the axis of rotation of the floor plate a. A shaft c is rotatably provided,
The female screw member d screwed onto the screw shaft c and the floor plate a are connected by a push-up link e, and the screw shaft c is rotated by an electric motor to move the female screw member d in the direction of the rotation axis. As a result, the floor plate a is rotated and raised via the push-up link e. In such a configuration, if the support height of the floor plate a is configured to be low in order to reduce the distance h between the back floor plate a and the female screw member d, the line of action f of the force acting on the floor plate a from the push-up link e and the point of action The angle θ formed by the straight line g connecting the rotation support point and It has been practically impossible to reduce the distance between the female threaded members d.

It is an object of the present invention to make it possible to reduce the angle θ using an extremely rational structure, thereby making it possible to reduce the thickness of the bed as a whole.

(Means for Solving the Problems) The configuration of the present invention will be explained based on FIGS. 1 to 3 corresponding to the embodiments. A screw shaft 4 is attached to the floor plate support frame 2 in a direction perpendicular to the rotation axis 3 of the floor plate 1.
is rotatably provided, and the first and second actuating parts 5 and 6, which are appropriately spaced apart in the longitudinal direction of the screw shaft 4, are movable by the female screw parts 7 and 8 that are screwed into the screw shaft 4. The tilting cam portion 9 for upward operation provided on the lower side of the floor plate 1 and the floor plate 1
It is configured to be operated by the first actuating part 5 on one end side, and the second actuating part 6 on the other end side of the floor plate 1 and the floor plate 1 are connected by a push-up link 10. The push-up link 10 has a play 11 in the operating direction on the floor plate 1 side or the second actuating part 6 side, so that the second actuating part 6 starts operating when the floor plate 1 rotates upward. the point in time,
This is configured to delay the start of the operation by the first actuator 5.

Here, in the illustrated example, the first and second actuating parts 5 and 6 are configured as internally threaded parts 7 and 8, respectively, but they are moved by a common internal threaded part. It may also be used as a configuration. Play again 11
In the configuration of the illustrated example, a connecting member 13 with a guide groove 12 is provided on the lower side of the floor plate 1, and
The guide groove 12 is provided at the end of the push-up link 10 on the floor plate 1 side.
Although the guide protrusion 14 that fits into the guide protrusion 14 is provided on the floor plate 1 side, any other suitable structure may be used, and as described above, the guide protrusion 14 may be provided on the second actuating portion 6 side. Furthermore, the first actuating part 5 may be made of a sliding member, in addition to being made of a roller as shown in the illustrated example, as long as the first actuating part 5 is configured to actuate the ascending inclined cam part 9.

(Function) Therefore, when the screw shaft 4 is rotated in a predetermined direction by an appropriate rotation drive source such as a motor in the state shown in FIG. 2a where the floor plate 1 is supported horizontally, the first The second actuating parts 5 and 6 are moved to the right in the figure by the female screw parts 7 and 8. At the beginning of movement, the push-up link 10 is within the range of the play 11, so it does not apply any force in the push-up direction to the floorboard 1, and only the first operating section 5 acts on the inclined cam section 9. Then, the floor plate 1 is gradually rotated upward.
The force required for such a rotational rise is small due to the slope principle. When the first operating section 5 raises the floor plate 1 to the predetermined angle shown in FIG. ,
As the second operating section 6 moves, the floor plate 1 is gradually rotated and raised. In this case, when the floor plate 1 is rotated and raised by the first actuator 5, the line of action i of the force acting on the floor plate 1 from the push-up link 10 and the straight line l connecting the point of action j and the rotation fulcrum k. The angle θ formed by the angle θ gradually increases. Therefore, when it is assumed that the push-up link 10 applies a force to the floor plate 1 in a state where the floor plate 1 is supported in a horizontal state as shown in FIG. In the state shown in FIG. 2b, as described above, since the angle θ is large, the force required to rotate and raise the floor plate 1 by the push-up link 10 is small. Furthermore, by reducing the angle θ when the floor plate 1 is supported horizontally, the distance between the first and second actuating parts 5, 6 and the floor plate 1 can be narrowed. can. As described above, the push-up link 10 moves the floorboard 1 along with the movement of the second operating section 6.
can be rotated and raised to a desired angle as shown in FIG. 2c.

Next, when lowering the floor plate 1 in the state shown in FIG. , while being supported by the push-up link 10. However, when it descends to the state shown in Figure 2 b,
When the first actuating part 5 comes into contact with the inclined cam part 9, the floor plate 1
, and the push-up link 10 reaches within the range of the play 11. In this way, the floor plate 1 is gradually lowered while being supported by the first actuating part 5 to the position shown in FIG. 2a.
It can be lowered to the horizontal position shown below.
At this time, the push-up link 10 moves within the range of play 11, so that no excessive force is applied from the floor plate 1.

(Embodiment) In the embodiment, the floor plate 1 is configured to exist almost within the space surrounded by the floor plate support frame 2 in a horizontal state, and a sprocket 15 is provided on one side of the screw shaft 4. A motor 16 is provided outside the floor plate support frame 2, and a chain 18 is constructed between a sprocket 17 on the side of the motor 16 and the sprocket 15 to constitute a drive mechanism. In addition, the drive mechanism may be configured to be driven by a manual crank handle or the like, and its installation location may be appropriate. Furthermore, in the embodiment, the floor plate 1 is a back floor plate, and only this back floor plate constitutes a bed that can be rotated up and down, but by a similar mechanism,
It goes without saying that other floorboards, such as a lumbar floorboard, can also be used to form a bed that can be rotated up and down. In the figure, reference numeral 19 is a cover of the drive mechanism, and 20 is a divided portion of the floor plate support frame 2. Further, reference numeral 21 indicates the guide projection 1.
Reference numeral 4 denotes a concave portion formed as necessary to prevent the floor plate 1 from moving inadvertently along the guide groove 12 in the rotating upward state, for example, in the state shown in FIG. 2c.

(Effects of the invention) As described above, when the present invention rotates and raises the floorboard from a horizontal state, initially only by causing the first actuating section to act on the inclined cam part, the floorboard is rotated and raised; The push-up link is configured to rotate and raise the floorboard only when the force required for the push-up link to rotate and raise the floorboard is reduced, so that the floorboard, floorboard support frame, and The overall thickness of the floorboard, including the lifting and lowering mechanism components, can be made significantly thinner than before.For example, it can be made to the same thickness as the urethane pine mattresses used in ordinary homes, and can be used as is. It is also possible to configure it so that it can be used, and it is very easy to install as it fits the current housing situation in general households, and it is also easily accepted by elderly people who tend to dislike the use of beds. There is an effect. Of course, the bed to which the elevating mechanism of the present invention is applied may have legs attached to the floor plate support frame.

[Brief explanation of drawings]

1 to 3 correspond to an embodiment of the present invention, FIG. 1 is an explanatory perspective view of the main part configuration, FIGS. 2 a, b, and c are explanatory diagrams of the main part structure and operation, FIG. 3 is an explanatory perspective view of the entire bed to which the mechanism of the present invention is applied, and FIG. 4 is an explanatory view of a conventional example. Symbol 1...Floor plate, 2...Floor plate support frame, 3...Rotation axis, 4...Screw shaft, 5, 6...First,
Second operating part, 7, 8...Female screw part, 9...Incline cam part, 10...Push-up link, 11...Play, 1
2... Guide groove, 13... Connection member, 14... Guide projection, 15, 17... Sprocket, 16... Motor, 18... Chain, 19... Drive mechanism cover, 20... Divided part, 21 ...Concavity.

Claims (1)

[Scope of utility model registration request] A floor plate support frame rotatably supports one end of the floor plate, and a screw shaft is rotatably provided in a direction perpendicular to the rotation axis of the floor plate, and a first screw shaft is provided at an appropriate interval in the length direction of the screw shaft. and a second actuating part is configured to be movable by a female threaded part screwed into the screw shaft, and an inclined cam part for upward operation provided on the lower side of the floor plate is configured to be movable by a female screw part screwed into the screw shaft, and a tilted cam part for upward operation provided on the lower side of the floor plate is connected to the first actuating part on one end side of the floor plate. The second actuating part on the other end side of the floor plate and the floor plate are connected by a push-up link, and the push-up link is connected to the floor plate side or the second actuating part side. By creating play in the operating direction, the second actuating section starts operating later than the first actuating section when the floor plate rotates and rises. A rotating lifting mechanism for the floorboard.