JPH07194662A - Lift support system - Google Patents

Abstract

PURPOSE:To provide a lift support system of a simple structure at low cost, capable of causing vertical movements by large strokes. CONSTITUTION:A lift support system comprises a first frame 10, a second frame 20 so installed as to overhang the first frame 10, and a third frame 30 so installed as to overhang the second frame 20. Rotatable sprockets 13, 14, and 15 are axially held by the first frame 10 and rotatable sprockets 23 and 24 are axially held by the second frame 20. Respective sprockets are interlocked with each other by a circulating chain 16 so as to be rotated in turn. The third frame 30 is joined with the circulating chain 16 by means of a joining member 32. When the sprocket 14 is driven for rotation by a drive motor 40, the circulating chain is driven, lifting first the third frame 30, and then the second frame 20, followed by the third frame 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and lowering support device for lifting and lowering a bed on which an object such as an operating table and a treatment table is placed.

[0002]

2. Description of the Related Art An operating table is taken as an example of a lifting support device,
A conventional lifting support device for lifting and lowering a bed on which a subject is placed to adjust the height will be described below. Operating table
As shown in FIG. 7, the lifting support device 100 and the bed 120 on which the subject is placed supported by the lifting support device 100.
The height of the subject placed on the bed 120 is adjusted by elevating and lowering the elevating and lowering support device 100 so that the surgery can be easily performed.

The lifting / lowering support device 100 is composed of three cylindrical frames that are axially inserted, and is constructed so as to obtain a large stroke. Inner first frame 1
01 is installed on the floor, etc., and the ball screw 10
2 is erected so as not to rotate. A first gear 103 is screwed onto the first ball screw 102, and a second gear 104 is meshed with the first gear 103. The first gear 103 and the second gear 104 are rotatably supported in the gear frame 106 of the intermediate second frame 105. 2nd gear 1
The second ball screw 107 screwed to 04 is vertically installed on the outer third frame 108 so as not to rotate. Second
A drive motor 109 is provided on the frame 105 and is connected to the second gear 104 via a speed reducer 110.

When the drive motor 109 is driven, the speed reducer 1
The second gear 104 is rotated via the second gear 10
The first gear 103 is also rotated in synchronization with No. 4. First gear 1
When 03 rotates while being screwed onto the first ball screw 102, the first gear 103 moves in the axial direction of the first ball screw 102. Since the second gear 104 rotates while moving in the axial direction in conjunction with the movement of the first gear 103, the second ball screw 107 with which the second gear 104 is screwed moves in the axial direction. That is, while the second frame 105 moves up and down with the first frame 101 as a reference,
The third frame 108 moves up and down, and the bed 120 moves up and down.

[0005]

However, the above-described conventional lifting / lowering support device for an operating table has the following problems. That is, the first gear 103 is attached to the second frame 105.
And the second gear 104 are provided so that the second frame 105 moves up and down outside the first frame 101, the mechanism for supporting the first gear 103 and the second gear 104 becomes complicated. In addition, the first and second ball screws 102,
Since 107 is cantilevered, it is necessary to make the support structure robust. For these reasons, the cost is increased, and the load on the support portion of the first ball screw 102 is large,
It is loose and unreliable during long-term use.

Further, since the transmission is achieved by the engagement between the first gear 103 and the second gear 104, there is a problem that a large amount of gear engagement noise is generated.

The second frame 105 is a speed reducer 110.
Since it is composed of a drive motor 109 and the like and is large in size, a large-scale support mechanism for the first ball screw 102 is required to raise and lower this. Further, the wiring required for the drive motor 109 also needs to be moved up and down as the second frame 105 is moved up and down, which complicates the wiring process.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inexpensive lifting / lowering supporting device which can be lifted / lowered with a large stroke by a simple structure.

[0009]

In order to achieve such an object, the present invention has the following configuration. That is, the first frame fixedly arranged, the second frame slidably supported by the first frame, the third frame slidably supported by the second frame, and the first frame
A first roller and a second roller rotatably supported on both sides of the lower part of the frame, and a third roller rotatably supported at a position substantially above the first roller on the upper part of the first frame.
On the surface of the roller and the second frame facing the roller mounting surface of the first frame, and in the state where the second frame is at the lowest position, the shaft is rotatably positioned above the intermediate position between the first and second rollers. The supported fourth roller and the third roller on the surface of the second frame and in the state where the second frame is most lowered.
A fifth roller rotatably supported at a position substantially opposite to the roller, an endless belt wound around the first to fifth rollers, and an endless belt via a slit formed in the second frame. It is provided with a connecting member for connecting the third frame, and a driving means provided on the first frame and driving the first or second roller.

[0010]

According to the lifting and lowering support device of the present invention, when raising from the lowered state, the first or second roller is rotated by the driving means provided on the first frame and wound around the first to fifth rollers. The endless belt is moved. Then, the third frame rises via the connecting member connected to the endless belt. At the time when the connecting member reaches the upper end of the slit formed in the second frame, further, in the state where the connecting member acts on the slit by the movement of the endless belt,
The second frame is pushed up. That is, the third frame rises with respect to the first frame, and the second frame
The frame and the third frame are raised.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Also in this embodiment, as in the conventional example, an elevating and lowering support device for an operating table will be described as an example. FIG. 1 is a schematic perspective view of a lift support device according to an embodiment, FIG. 2 is a vertical cross-sectional view of the lift support device, and FIG. 3 is a cross-sectional view taken along the line AA. Note that FIG.
Shows a raised state, and FIG. 2 shows a lowered state.

As shown in FIGS. 1 and 3, the elevating and lowering support device is a rectangular tubular first frame 10 provided inside and serving as a base, and a rectangular tubular shape provided so as to cover the first frame 10. The second frame 20 and a third cylindrical frame 30 provided so as to cover the second frame 20. The foot stand 11 is attached to the first frame 10 and placed on the floor or the like. The first frame 10 is
As shown in FIG. 3, it is formed in a substantially rectangular shape in a plan view, and a pair of guide rails 12 are provided on both side surfaces thereof. A pair of guide members 21 slidably fitted to the guide rails 12 are fixedly installed on the inner surface of the second frame 20.
The frame 20 is supported by the first frame 10 so as to be vertically movable. Further, as with the first frame 10, a pair of guide rails 22 are provided on both side surfaces of the second frame 20. A pair of guide members 31 slidably fitted to the guide rails 22 are fixed to the inner surface of the third frame 30, and the third frame 30 is supported by the second frame 20 so as to be able to move up and down.

A bed 50 for mounting a subject is attached to the upper part of the third frame 30. By placing the subject on the bed 50 and moving the second frame 20 and the third frame 30 up and down, a doctor or the like adjusts the height position of the subject to easily perform the surgery.

A first sprocket 13 and a second sprocket 14 are rotatably supported on the lower part of one side surface of the first frame 10, and a third sprocket 15 is rotatably supported above the second sprocket 14. . The first sprocket 13 and the second sprocket 14 are the same as the first sprocket of the present invention.
It corresponds to a roller and a second roller, and the third sprocket 15 corresponds to a third roller.

As shown in FIG. 2, the inner surface of the second frame 20 has the first sprocket 13 in the most contracted state.
And the second sprocket 14 between the fourth sprocket 23 and the first sprocket 13 and the fifth sprocket 23 above.
A sprocket 24 and a sprocket 24 are rotatably supported. The fourth sprocket 23 corresponds to the fourth roller of the present invention, and the fifth sprocket 24 corresponds to the fifth roller.

The first sprocket 13 to the fifth sprocket 24 are provided on the substantially same plane between the first frame 10 and the second frame 20, and the endless chain 16 corresponding to the endless belt of the present invention. Are linked so that they are interlocked with each other. The third frame 30 is attached to the chain 16 via a frame connecting member 32 corresponding to the connecting member of the present invention. A slit 25 is formed in the second frame 20 so that the frame connecting member 32 can be moved up and down, and the up and down movement of the third frame 30 is restricted.

A drive motor 40 corresponding to the drive means of the present invention is provided on the foot 11 of the first frame 10, and the second sprocket 14 is connected to the output shaft of the drive motor 40 via a speed reducer 41. There is.

Next, the operation of the apparatus of this embodiment will be described with reference to FIGS. 2, 4 and 5. FIG. 4 shows a state where the frame connecting member 32 acts on the upper portion of the slit 25, and FIG. 5 shows a most raised state. As shown in FIG. 2, when the drive motor 40 is driven to raise it from the most lowered state, the second sprocket 14 starts rotating counterclockwise via the reduction gear 41. Second sprocket 1
As shown in FIG. 4, the counterclockwise rotation of 4 causes the first and third sprockets 13 and 15 of the first frame 10 to rotate counterclockwise via the chain 16. further,
The fourth sprocket 23 of the second frame 20 is rotated clockwise via the chain 16 and the fifth sprocket 24 is rotated.
Is rotated counterclockwise. As a result, the chain 16 moves while the second frame 20 is stopped, and the third frame 30 is lifted via the frame connecting member 32.

When the frame connecting member 32 reaches the upper end of the slit 25 of the second frame 20, the second frame 20 is moved while the frame connecting member 32 acts on the slit 25 by the movement of the chain 16. Pushed up. The fourth sprocket 23 and the fifth sprocket 24 ascend together with the second frame 20 so that the chain 1
No. 6 on each sprocket and the third frame 3
0 is increased. The fourth sprocket 23 is pulled up by the chain 16 while being rotated. As a result, the second frame 20 is raised.

In the above embodiment, the first frame 1
The second frame 20 outside the 0, and the second frame 20
Although the third frame 30 is provided on the outer side of the first frame 70, the present invention is not limited to this. For example, as shown in FIG. 7
1, and the third frame 72 inside the second frame 71.
May be deployed. First and second sprockets 73 and 74 are rotatably supported on the lower part of one inner side surface of the first frame 70, and a third sprocket 75 is rotatably supported above the second sprocket 74. On one side surface of the second frame 70, in the most raised state, the first sprocket 7
4th located above between 3 and the 2nd sprocket 74
A sprocket 76 and a fifth sprocket 77 are rotatably supported above the first sprocket 73. The first sprocket 73 to the fifth sprocket 77 are the first
The frame 70 and the second frame 71 are provided on substantially the same plane, and are connected so as to interlock with each other by an endless chain 78. The third frame 72 is attached to the chain 78 via a frame connecting member 79. A slit 80 is formed in the second frame 71 so that the frame connecting member 79 can be moved up and down, and the up and down movement of the third frame 72 is restricted.

In the above embodiment, each frame has a rectangular tube shape, but the present invention is not limited to this. For example, the second frame and the third frame are slidably supported on the basis of the first frame. If so, each frame may have a plate shape.

Further, although the endless chain is used in the above embodiment, the present invention is not limited to this, and for example, a connecting structure of a toothed roller and an endless toothed belt may be used.

[0023]

As is apparent from the above description, according to the lifting / lowering support device of the present invention, the second frame and the third frame have the first to fifth rollers and the endless belt with respect to the first frame. Since it is moved up and down by and, a large stroke can be obtained with a simple structure. Moreover, since the heavy drive means is provided in the first frame that is placed on the floor or the like and the second frame and the third frame that are made lighter are moved up and down, it is not necessary to make the support structure robust, and the cost is reduced. It

Further, since the lifting is performed by the rotation transmission of the first to fifth rollers and the endless belt, the noise during the lifting can be reduced. When the lifting / lowering support device of the present invention is used in an operating table or the like, it is possible to perform an operation or the like without causing discomfort to a doctor or a subject.

Further, since the driving means is provided in the first frame, the wiring process required for the driving means is facilitated and the cost is reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a lift support device according to the present invention.

FIG. 2 is a vertical cross-sectional view of a lift support device.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a view showing a state in which a frame connecting member acts on an upper end of a slit.

FIG. 5 is a vertical cross-sectional view in a state in which the lift is maximized.

FIG. 6 is a vertical cross-sectional view showing a modified example of the embodiment apparatus.

FIG. 7 is a vertical cross-sectional view of a conventional device.

[Explanation of symbols]

 10 ... 1st frame 13 ... 1st sprocket (1st roller) 14 ... 2nd sprocket (2nd roller) 15 ... 3rd sprocket (3rd roller) 16 ... Chain (endless belt) 20 ... 2nd frame 23 ... Fourth sprocket (fourth roller) 24 ... Fifth sprocket (fifth roller) 25 ... Slit 30 ... Third frame 32 ... Frame connecting member (connecting member) 40 ... Drive motor (driving means) 50 ... Bed

Claims (1)

[Claims] 1. A first frame fixedly arranged, and a second frame slidably supported with respect to the first frame,
A third frame slidably supported with respect to the second frame, a first roller and a second roller rotatably supported on both lower sides of the first frame, and a first roller above the first frame. On the surface of the third roller rotatably supported at a position substantially above the roller and the second frame facing the roller mounting surface of the first frame, and in the state where the second frame descends most, The fourth roller rotatably supported above the intermediate position of the second roller and the third roller on the surface of the second frame and in the most lowered state of the second frame substantially oppose the third roller. A fifth roller rotatably supported at a position, an endless belt wound around the first to fifth rollers, and an endless belt and a third frame through a slit formed in the second frame. Connect the connecting member and the first frame Is Bei, vertical movement support apparatus characterized by comprising driving means for driving the first or second roller, the.