JPH0240842Y2 - - Google Patents

Description

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

(Prior art) One end of a rotary support arm is rotatably fixed to both sides of the foot side and head side of the base, and the other end of the rotary support arm is attached to a floor support frame. The lifting mechanism is rotatably fixed to a provided support arm, and the rotating support arm is rotated by a drive arm driven by a screw shaft type telescoping rod operated by a crank handle to raise and lower the floor support frame. Conventionally, for example, as in the bed disclosed in Japanese Utility Model Publication No. 54-33531,
The crank handle and screw shaft type telescoping rod are installed on the floor support frame.

(Problem to be solved by the invention) Since the screw shaft type telescoping rod is relatively heavy, the force required to raise the floor support frame increases accordingly.To prevent this, the crank handle and screw shaft type telescoping rod are If it is provided on the base side, the operating position will be at the bottom, which poses a problem in that it will be very difficult to operate.

The present invention aims to solve such problems.

(Means for Solving the Problems) Means for solving the above problems will be explained with reference to the drawings corresponding to the embodiments. One end of the rotary support arms 3, 3' is rotatably fixed to both sides of the foot side and the head side in the width direction, and the other end of the rotary support arm 3, 3' is fixed to the floor support frame 1. Support arm 4 provided on
4', and the rotary support arms 3, 3'
In the elevating mechanism for raising and lowering the floor support frame 1 by rotating a drive arm 8 driven by a screw shaft telescopic rod 9 operated by a crank handle, the screw shaft telescopic rod 9 is a screw shaft. An outer cylinder member 17 that rotatably supports 10 is supported on the base 2 so as to be rotatable in the vertical direction,
The other end of the actuating pipe 11 is configured to be extendable and retractable with respect to the outer cylinder member 17 and has a female thread screwed onto the screw shaft 10 at one end.
A crank handle 12 is supported on the floor support frame 1, and the screw shaft 10 and the crank shaft 13 of the crank handle 12 are connected in turn to a universal joint 14, which is telescopic and transmits rotational force. They are connected via a freely movable drive rod 15.

(Function) In the above configuration, when the crankshaft 13 is rotated by operating the crank handle 12, this rotational force is transmitted from the drive rod 15 to the screw shaft 10 via the universal joint 14, and the screw shaft 10 Rotate. The outer cylindrical member 17 that rotatably supports the screw shaft 10 is supported on the base 2, so when the screw shaft 10 rotates, the female thread
Moving along this screw shaft 10, the operating pipe 11 moves and rotates the rotation support arms 3, 3' via the drive arm 8, so that the floor support frame 1 rises and lowers with this rotation. .

When the floor support frame 1 goes up and down, the screw shaft 10
Although the distance and relative position of the crankshaft 13 change, this change can be absorbed by the expansion and contraction of the drive rod 15 and the universal joint 14, so that no problem occurs in the above-mentioned lifting and lowering.

In this way, since the screw shaft type telescopic rod 9 is supported on the base 2, this screw shaft type telescopic rod 9
It is possible to reduce the weight of the floor support frame 1 which should be raised by the weight of the floor support frame 1, and since the crank handle 12 for operating the crank handle 12 is supported on the floor support frame 1, operability is good.

(Example) Next, an example of the present invention will be described with reference to FIGS. 1 to 3.

In the figure, numeral 1 is a floor support frame, and 2 is a base. One end of the rotary support arms 3, 3' is rotatably fixed to both sides of the foot side and the head side of the base 2 in the width direction, and the other end of the rotary support arms 3, 3' is rotatably fixed. are rotatably fixed to support arms 4, 4' provided on the floor support frame 1. These rotation support arms 3, 3' on both sides
are connected by interlocking support rods 5, 5', and a drive arm 8 is provided protruding from the connection support rods 5, 5' corresponding to the rotational support arms 3, 3' on the foot side or the head side.
Interlocking arms 6, 6' are provided protruding from connecting support rods 5, 5' corresponding to the rotating support arms 3, 3' on both sides, and an interlocking rod 7 is connected between these interlocking arms 6, 6'. There is.

Reference numeral 9 denotes a screw shaft type telescoping rod, and this screw shaft type telescoping rod 9 is supported on the base 2 so that an outer cylindrical member 17 that rotatably supports the screw shaft 10 can be rotated in the vertical direction. The other end of the actuating pipe 11 is configured to be extendable and retractable with respect to the outer cylindrical member, and has a female thread (not shown) screwed onto the threaded shaft 10 at one end, and is connected to the drive arm 8. . Reference numeral 16 denotes a support member that supports the outer cylinder member 17, and the support member 16 supports the outer cylinder member 17 via a gimbal-shaped support member 18 with its support arms 4 and 4'. Note that this support member 16 may also include a support arm portion for supporting an electric motor or a hydraulic cylinder.

Reference numeral 12 denotes a crank handle, and the crank handle 12 rotatably supports a crankshaft 13 on the floor support frame 1. The reference numeral 14 is a universal joint, and the reference numeral 15 is a drive rod that is extendable and capable of transmitting rotational force. The drive rod 15 may be constructed by fitting inner and outer square pipes together, or may be constructed by providing concave and convex portions at corresponding positions of the fitted round pipes, as appropriate.

Thus, the screw shaft 10 and the crankshaft 13 of the crank handle 12 are sequentially connected to the universal joint 14.
and is connected via the drive rod 15. As shown in the figure, the crankshaft 13 can be supported rotatably in the vertical direction, or can be supported parallel to the floor support frame 1. In this case, the crankshaft 13 and the drive rod It is sufficient to connect another universal joint between 15 and 15.

In the above configuration, when the crankshaft 13 is rotated by operating the crank handle 12, this rotational force is transmitted from the drive rod 15 to the screw shaft 10 via the universal joint 14, and the screw shaft 10 rotates. The outer cylindrical member 17 that rotatably supports this screw shaft 10 is supported on the base 2, so when this screw shaft 10 rotates, the female thread moves along this screw shaft 10, and the working pipe 11 moves and rotates the rotary support arm 3 via the drive arm 8, so that the corresponding portion of the floor support frame 1 moves up and down along with this rotation. Further, when the rotational support arm 3 on the drive arm 8 side rotates, the interlocking arm 6' on the other side is driven from the interlocking arm 6 on this side via the interlocking rod 7, and thus the rotational support arm 3 on this side ' are also rotated in conjunction with each other, and the corresponding portions of the floor support frame 1 are accordingly raised and lowered in conjunction with each other.

That is, in the state shown in FIGS. 1 and 2, when the screw shaft 10 rotates in a predetermined direction and the actuating pipe 11 moves in a direction in which it extends from the outer cylinder member 17 due to the movement of the female thread, the drive arm 8 is driven to the left in the figure, the rotation support arm 3 rotates clockwise around the rotation support point with the base 2, so the floor support frame 1 rises and the screw shaft 10 moves upward. When rotated in the opposite direction, it descends. As described above, when the rotation support arm 3 on the driving arm 8 side rotates, the interlocking arm 6' on the other side is driven from the interlocking arm 6 on this side via the interlocking rod 7, and thus the rotation on this side. The dynamic support arm 3' also rotates in conjunction, and the corresponding portion of the floor support frame 1 accordingly moves up and down in conjunction.

When the floor support frame 1 moves up and down in this way, the distance and relative position between the screw shaft 10 and the crankshaft 13 change, but this change can be absorbed by the expansion and contraction of the drive rod 15 and the universal joint 14. Yes, there will be no inconvenience when going up and down.

In this way, since the screw shaft type telescopic rod 9 is supported on the base 2, this screw shaft type telescopic rod 9
It is possible to reduce the weight of the floor support frame 1 which should be raised by the weight of , and since the crank handle 12 for operating the crank handle is supported on the floor support frame 1, operability is good.

In the above embodiment, the foot side and head side of the floor support frame 1 are moved up and down in conjunction with the interlocking arms 6, 6' and the interlocking rod 7; First, it is also possible to configure the lifting mechanism of the present invention for each of the parts so that they can be raised and lowered separately.

(Effects of the invention) As described above, the present invention supports the screw shaft type telescoping rod on the base, reducing the weight of the floor support frame that should be raised by the weight of the screw shaft type telescoping rod. Moreover, since the crank handle used for the operation is supported on the floor support frame, it has the advantage of good operability.

[Brief explanation of the drawing]

All the figures show an embodiment of the present invention, and FIG. 1 is an explanatory side view showing the overall configuration, FIG. 2 is an explanatory side view with enlarged main parts, and FIG. 3 is an explanatory perspective view showing the overall configuration. It is. Code, 1...floor support frame, 2...base, 3,
3'...Rotation support arm, 4, 4'...Support arm, 5,
5'...Connection support rod, 6,6'...Interlocking arm, 7...
Interlocking rod, 8... Drive arm, 9... Screw shaft telescopic rod, 10... Screw shaft, 11... Working pulp, 12... Crank handle, 13... Crank shaft, 14... Universal joint, 15... ...driving rod, 16
... Support member, 17 ... Outer cylinder member, 18 ... Gimbal-shaped support member.

Claims (1)

[Scope of utility model registration request] One end of the rotary support arm is rotatably fixed to both sides of the foot side and the head side of the base in the width direction, and the other end of the rotary support arm is attached to the support arm provided on the floor support frame. In the elevating mechanism for raising and lowering the floor support frame by rotating the rotatable support arm by a drive arm driven by a screw shaft telescopic rod operated by a crank handle, the screw The shaft-type telescoping rod has an outer cylindrical member that rotatably supports a screw shaft supported on the base so as to be vertically rotatable, and is configured to be extendable and retractable with respect to the outer cylindrical member, and has one end attached to the outer cylindrical member. The other end of an operating pipe having a female thread screwed onto the screw shaft is connected to the drive arm, and the floor support frame supports a crank handle, and the screw shaft and the crank shaft of the crank handle are connected to the floor support frame. A drive mechanism for lifting and lowering a floor support frame, characterized in that these are successively connected via a universal joint and a drive rod that is expandable and capable of freely transmitting rotational force.