JP2969760B2 - Patient transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a patient used to transfer an anesthetized patient or a patient who cannot move between a bed and an operating table or from a bed to another bed. It relates to a transfer device.

<Prior Art> The above-described patient transfer device inserts one end of a stage around which a wide belt is wound so as to be rotatable left and right along the outer periphery under a patient lying on a bed or an operating table, After the patient is picked up and transferred to the stage by rotating the belt, it is configured to be transferred to the operating table or bed in the reverse order.In general, a movable frame that can move up and down along each support, A flat plate-shaped stage that is installed between movable frames and that can move horizontally to the left and right, a patient mounting belt that is rotatably wound left and right along this stage, and the front and rear movable frames are synchronized. A vertical driving means for moving the stage horizontally with respect to the movable frame; and a belt driving means for rotating the belt left and right.

<Problems to be Solved by the Invention> In the above-described conventional patient transfer device, a lifting drive motor, a speed reducer, a transmission shaft, and a horizontal drive motor, a speed reducer, and a transmission that form the horizontal drive means constitute the elevation drive means. axis,
In addition, since the belt drive motor, reduction gear, transmission chain, belt drive roller, belt tension mechanism, etc. that make up the belt drive mechanism are all incorporated into the stage holder, the weight of the device that moves up and down is considerably large (several hundred kg).
That is, a high-output lifting drive motor was used.

 As a result, the following problems were found.

(1) Since a high-output motor is used for the lifting drive motor, the motor drive noise is large, the power consumption is large, and the running cost is high.

(2) Even if a balance mechanism is incorporated to reduce the load on the lifting drive motor, it is difficult or large to achieve a sufficient balance because the load weight is large as described above.

(3) Stopping accuracy is poor due to the large weight of the device to be raised and lowered, and there is a possibility that the device may be damaged by strong contact with the bed or the operating table.

(4) Rigidity and strength for holding various driving mechanisms on the movable frame that moves up and down are required, and the movable frame itself and the columns are increased in size and weight.

(5) Since the drive motor is incorporated in the movable frame, the power line also moves, and there is a possibility of disconnection trouble.
Cable treatment for preventing disconnection is required, which contributes to an increase in cost.

(6) The center of gravity of the entire apparatus is high, the stability is low when transported in an assembled state, and the handleability during transport installation is low.

The present invention has been made in view of such circumstances, and an object of the present invention is to solve the above-mentioned conventional problems by improving each part driving means.

<Means for Solving the Problems> The present invention has the following configuration to achieve the above object.

In other words, the patient transfer device of the present invention has a pair of front and rear columns erected on the base frame, a movable frame that can move up and down along each column, and is erected between the two movable frames to be horizontally movable left and right. A flat plate-shaped stage, a patient-mounted belt wound rotatably left and right along the stage, lifting drive means for vertically moving the front and rear movable frames in synchronism, and moving the stage What is claimed is: 1. A patient transfer device comprising: a horizontal drive unit for horizontally moving a frame horizontally, and a belt drive unit for rotating the belt left and right, wherein the elevating unit is fixed on a base frame. A drive motor, a movable frame elevating mechanism provided in the front and rear columns, and a transmission mechanism for linking the lower part of both movable frame elevating mechanisms and the drive motor in an interlocking manner, wherein the horizontal drive means is mounted on the base frame. Fixed horizontal drive module , A horizontal drive mechanism for moving the stage left and right by a rotating body provided in each movable frame, a transmission shaft erected in each column to drive the rotating body, and interlocking each transmission shaft with the driving motor. A belt drive motor fixedly mounted on a base frame, a belt drive roller fixedly supported in a front-rear horizontal manner below a stage, and a belt drive roller. And a transmission mechanism for interlocking the belt drive motor and the belt drive motor, and a tension mechanism acting on the belt wound around the stage and the belt drive roller.

<Operation> According to the above characteristic configuration, the movable frame only needs to have sufficient rigidity and strength to support the stage, and is lightweight.

In addition, the power line for the electric motor of each drive means is fixed wiring.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a longitudinal front view of the patient transfer device 1 according to the present invention.
FIG. 2 shows a longitudinal side view thereof, and FIG. 4 shows an overall appearance and a use form thereof.

This patient transfer device 1 basically moves up and down along a base frame 2 installed on the floor surface, a pair of hollow columns 3 erected on the front and rear ends thereof, and each column 3. A pair of front and rear movable frames 4, a flat plate-shaped stage 5 laid horizontally on both movable frames 4, and supported so as to be horizontally movable left and right, and a patient wound along the stage 5. It is composed of a mounting belt 6, a vertically driving unit for moving the movable frame 4, a horizontal driving unit for the stage 5, and a driving unit for the belt 6.

Then, as shown in FIG. 4, the bed 7 on which the patient P is lying is carried into the side of the apparatus 1 and the height of the stage 5 is adjusted to the height of the bed 7 so that one side of the patient P is placed. The patient P is picked up on the belt 6 by rotating the belt 6 and transferred onto the stage 5. Thereafter, the operating table or another bed is carried to the side of the apparatus, and is used so as to be transferred to the operating table or a bed in the reverse procedure.

 Next, the driving means of each unit will be described.

(Elevation Driving Means) The movable frame 4 is supported and supported by a support 3 in parallel via a guide mechanism (not shown) so as to be able to move up and down, and a spline shaft 8 vertically installed in the support 3 penetrates the movable frame 4. ing.

A chain 9 that rotates up and down as a movable frame elevating mechanism is stretched inside each column 3, and both ends of the chain 9 are connected to the upper and lower sides of the movable frame 4. Also base frame 2
An elevating drive motor 10 and a speed reducer 11 are fixedly mounted on the top, and an output shaft 12 of the speed reducer 11 and a drive shaft 13 wound around the lower end of the chain 9 are interlocked and connected via a chain transmission mechanism 14, The chain 9 in each column 3 is synchronously rotated by the forward or reverse rotation of the lifting drive motor 10, and the front and rear movable frames 4 are raised and lowered in synchronization.

(Horizontal Driving Means) Both front and rear ends of the stage 5 are supported by the movable frame 4 via a guide member 5a so as to be slidable left and right horizontally, and a left and right horizontal rack gear 15 provided on the back surface of the guide member 5a is provided. The spline shaft 8 is rotatably supported by the movable frame 4 and is engaged with a pinion gear (rotary body) 16 which is externally slidable up and down on the spline shaft 8. On the base frame 2, a horizontal drive motor 17 and a speed reducer 18 are installed and fixed, and an output shaft 19 penetrating through the speed reducer 18 and a lower end of each spline shaft 8 are interlocked via a transmission shaft 20 and a bevel gear mechanism 21. When the horizontal drive motor 17 is driven forward or backward, the front and rear spline shafts 8 are driven in opposite directions to each other, and the pinion gear 16 is rotated.
Is driven, whereby the stage 5 is horizontally moved left and right.

(Belt Driving Means) After the belt 6 wound along the stage 5 is wound under the stage via a pair of left and right fixed guide rollers 22 laid between the movable frames 4 as shown in FIG. The zigzag is wound around a pair of left and right tension rollers 23 in a zigzag manner, and is wound around a drive roller 24 horizontally supported over the front and rear columns 3.

A belt drive motor 25 and a reduction gear are mounted on the base frame 2.
The output shaft 27 of the speed reducer 26 and the drive roller 24 are linked and connected by a chain 28.

A total of four left and right wires 30 with the movable frame 4 suspended and connected at one end are wound around left and right pulleys 29 supported on the top plate of each support 3, and the other end of the wires 30 is balanced. The weight 31 is attached to reduce the load on the lifting drive motor 10. Then, a wire 32 having one end connected to the base frame 2 is wound around the moving pulley 33 and the fixed pulley 24 and connected to the lower portion of the balance weight 31, and the moving pulley 33 and the tension roller 23 are connected to the spring 25 by a spring 25. And a tension mechanism 36 that maintains the tension of the belt 6 when the stage 5 moves up and down is kept constant.

That is, when the movable frame 4 is lowered from the state shown in FIG.
The wires 30 and 32 are pulled upward, whereby the moving pulley 33 is lowered by half of the movable frame lowering amount. At this time, the required lowering amount of the tension roller 23 due to the lowering of the stage 5 is 1/2 of the lowering amount of the stage, which coincides with the lowering amount of the moving pulley 33, and the load of the spring 35 does not change regardless of the lowering. A constant tension always acts on the belt 6. Similarly, when the stage is lifted, the tension roller 23 and the moving pulley 33
And the belt tension is kept constant.

A pressing roller 37 presses the belt 6 onto the driving roller 24 in order to prevent the driving roller 24 from slipping between the driving roller 24 and the belt 6, and is always pressed downward by a spring (not shown).

Note that the present invention can be implemented by being modified into the following forms.

(1) As shown in FIG. 3, one of the tension rollers 23a and 23b provided on both sides of the drive roller 24 is fixed in position, and only the other tension roller 23b is lowered via a spring 35 and a wire 32. Tension mechanism 36
May be configured. In this case, the tension roller 23b moves up and down by the same amount as the stage moving up and down to maintain the belt tension constant.

(2) As a mechanism for raising and lowering the movable frame 4, a screw feed mechanism may be used in addition to the above-described use of the chain 9.

(3) A telescopic transmission shaft can be used instead of the spline shaft 8.

(4) As a horizontal drive mechanism of the stage, a screw feed system may be adopted in addition to the rack and pinion system.

(5) The balance weight 31 need not always be provided.

<Effects of the Invention> As described above, the present invention has the following effects.

(1) The movable frame supports only the stage, the belt, and the rotating body for horizontal movement of the stage. The motor driving noise was reduced, and the power consumption was reduced, thereby reducing the running cost.

(2) Since the weight of the elevating device is reduced, not only the incorporation of the balance weight is facilitated, but also the elevating device can be easily raised and lowered without the balance weight.

(3) The inertia is reduced as the weight of the device to be raised and lowered is small, and the stopping accuracy is improved.

(4) The movable frame can be light and small, which is effective in reducing the weight and size of the entire apparatus.

(5) Since the drive motors are fixedly mounted, the power lines are also fixed wirings, so that there is no disconnection trouble caused by moving up and down the stage, and special cable processing is invariable and costs are reduced.

(6) Since the heavy drive motor and its associated through transmission mechanism are located at the lower part of the apparatus, the center of gravity of the apparatus is low, and transport after assembly and handling at the installation site are improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a patient transfer apparatus according to one embodiment of the present invention, FIG. 2 is a longitudinal sectional front view thereof, FIG. 3 is a longitudinal sectional front view showing a modification of the belt tension mechanism, and FIG. FIG. 2 is a perspective view showing the overall appearance and usage of the device. DESCRIPTION OF SYMBOLS 1 ... Patient transfer apparatus, 2 ... Base frame 3 ... Post, 4 ... Movable frame 5 ... Stage, 6 ... Belt 7 ... Bed, 8 ... Spline shaft 9 ... Chain, 10 ... Drive motor 11: Reducer, 12: Output shaft 13: Drive shaft, 14: Chain transmission mechanism 15: Rack gear, 16: Pinion gear 17: Horizontal drive motor, 18: Reducer 19: Output Shaft, 20: Transmission shaft 21: Bevel gear mechanism, 22: Fixed guide roller 23: Tension roller, 24: Drive roller 25: Belt drive motor, 26: Reducer 27: Output shaft, 28 … Chain 29… Pulley, 30… Wire 31… Balance weight, 32… Wire 33… Moving pulley, 34… Fixed pulley 35… Spring, 36… Tension mechanism

Claims (1)

(57) [Claims] 1. A pair of front and rear columns erected on a base frame, a movable frame movable up and down along each column, and a flat plate-like member erected between the movable frames and horizontally movable left and right. A stage, a patient-mounted belt that is rotatably wound left and right along the stage, lifting and lowering driving means for vertically moving the front and rear movable frames in synchronism, and A horizontal drive means for moving the belt horizontally, and a belt drive means for rotating the belt to the left and right, comprising: a lifting drive motor fixedly mounted on a base frame; A movable frame raising / lowering mechanism provided in the column of the above, and a transmission mechanism for interlockingly connecting the lower portions of both movable frame lifting / lowering mechanisms and the driving motor, wherein the horizontal driving means is fixedly mounted on a base frame. Motor and each movable frame A horizontal drive mechanism for moving the stage left and right by the obtained rotator, a transmission mechanism provided in each column to drive the rotator, and a transmission mechanism for interlocking and coupling each transmission mechanism and the drive motor, A belt drive motor fixedly mounted on the base frame, a belt drive roller fixedly mounted in the front-rear direction below the stage, and a transmission mechanism for interlockingly connecting the belt drive roller and the belt drive motor. And a tension mechanism that acts on a stage and a belt wound around a belt driving roller.