JPH029722Y2 - - Google Patents

Description

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

(Prior art) A typical conventional floor lifting mechanism using a driving mechanism such as a telescopic rod or a hydraulic cylinder with female and male screws is one side as shown in Fig. 3. A configuration in which a push-up arm c is protruded from the underside of a floor b to be raised and lowered that is rotatably fixed to a floor support frame a, and a drive member d of the drive mechanism is directly connected to the tip of this push-up arm c. There is.

(Problem to be solved by the invention) However, in such a conventional mechanism, the tip of the push-up arm C and the driving member d also move up and down as the floor rotates and goes up and down. Because the drive members protrude downward, it is impractical to pack them with them attached, and it is time-consuming to install them on-site. Since the above-mentioned amount of protrusion changes, there is a drawback that when storage boxes and the like are stored in the space below the floor, problems such as damage to the storage boxes and the like are likely to occur.

The object of the present invention is to eliminate the above-mentioned conventional drawbacks and to minimize the vertical movement of the drive member as the floor rises and falls. The following is a detailed description based on examples.

(Means for Solving the Problems) Reference numeral 1 denotes a floor portion to be raised and lowered, for example, a back portion, and one end of this floor portion 1 is rotatably fixed to a floor portion support frame 2. An operating shaft 3 parallel to the rotation axis l is provided below one end of the floor 1, and both ends of the operating shaft 3 are rotatably fixed to one end 5 of a support link 4, and the support The other end 6 of the link 4 is rotatably fixed to the floor support frame 2 on the side away from the rotation axis l of the floor 1. Further, a push-up arm 7 and a drive arm 8 are protruded from the operating shaft 3, and the tip of the push-up arm 7 is rotatably fixed to the floor 1. A drive member 9 connected to a drive mechanism such as a telescopic rod or a hydraulic cylinder by screwing is connected. In the figure, the push-up arm 7 is provided only on one side of the floor portion 1, but it goes without saying that it may be provided on both sides.

(Function) As shown in FIG. 2a, when the floor portion 1 is in a horizontal state, the drive member 9 is
When the drive arm 8 is moved to the left in the figure, the actuating shaft 3 rises along the rotation locus of one end 5 of the support link 4 and rotates clockwise in the figure with respect to the support link 4. 2b to 2c. At this time, the operating shaft 3 from which the push-up arm 7 and the drive arm 8 are protruded is raised by the support link 4 when the floor section 1 is rotated and raised, so that the drive member 9 and the drive arm 8 The height of the connecting portion 10 increases by the amount of rise of the actuating shaft 3, and therefore the amount of descent of the connecting portion 10 can be effectively reduced. In this way, the present invention allows the floor part 1 to be rotated upward by the push-up arm 7 via the drive arm 8 without moving the drive member 9 up or down, and to be lowered by the reverse operation.

(Effects of the invention) As described above, the present invention reduces the vertical movement of the driving member when the floor is raised and lowered, so when storing storage boxes etc. in the space below the floor, it is difficult to avoid contact with the driving member This has the effect of being able to prevent damage, and since the mechanism can be made thin when the floor is in a horizontal state, it has the effect of being easy to pack, transport, stack, etc.

[Brief explanation of the drawing]

Fig. 1 is a perspective explanatory view of essential parts showing an embodiment of the configuration of the present invention, Figs. 2 a, b, and c are side explanatory views showing the operation of the configuration of Fig. 1, and Fig. 3 is an explanatory view of a conventional example. It is. Reference numerals 1...floor, 2...floor support frame, 3...operating shaft, 4...support link, 5...one end, 6...
Other end, 7... push upper arm, 8... driving arm, 9... driving member, 10... connecting portion, l... rotating shaft.

Claims (1)

[Scope of utility model registration request] One end of the floor to be raised and lowered is rotatably fixed to a floor support frame, and an operating shaft parallel to the rotation axis of the floor is provided below one end of the floor, and the operating shaft is Both ends of the support link are rotatably fixed to one end of the support link, and the other end of the support link is rotatably fixed to the floor support frame on the side away from the rotation axis of the floor, and the operation A bed or the like characterized in that a pushing upper arm and a driving arm are protruded from the shaft rod, the tip of the pushing upper arm is rotatably fixed to the floor, and a driving member is connected to the tip of the driving arm. Floor lifting mechanism.