JPH022337Y2 - - Google Patents

Description

[Detailed description of the invention] This invention allows the patient to be scooped from one side to the other, transported to the patient transfer window, operating room stretcher, or operating table, and lowered onto those tables, or transferred in the reverse order. In a patient transfer device intended for patient transfer, the speed of these two operations is to slide the upper plate on which the patient is placed from side to side, and to rotate the endless patient transfer belt that wraps around the upper plate. By converting
patient transfer equipment for loading, unloading, and moving patients;
This invention relates to improvements in drive devices.

In the conventional power transmission of this type of patient transfer belt, the drive shaft for driving the full-surface drive belt was thick and long to withstand bending stress, but in the present invention, two narrow drive belts are used. By providing it on both sides of the inside of the upper frame of the stretcher, about 1/4 of the length in the longitudinal direction, the patient's weight received by the patient transfer belt is concentratedly received, increasing the frictional force of close contact between the drive belt and the transfer belt. In this way, power can be transmitted even if the contact area becomes small when the transfer belt protrudes to one side.

To explain the patient transfer stretcher using the present invention with reference to the drawings, as shown in FIG. It is connected to the upper frame block 3 with a pin. The upper frame block 3 is integrated with the upper frame 4, and chain blocks 5 are fixed to both sides of the upper frame 4 in the longitudinal direction. An upper plate 7 is supported by the plate support rollers 6 of the chain block, and belt rotating rollers 8 are attached to both ends of the upper plate in the width direction, as shown in FIG. A single patient transfer belt 9 that covers the entire upper plate 7 is stretched, and on this plate,
As shown in FIG. 3, chains 10 are connected at diagonal positions, and by pulling this chain, the upper plate 7 slides. At two places on the upper frame 4, the third
A drive belt block 11 is provided as shown in the figure, and a drive belt roller 1 is provided as shown in FIG.
The drive belt 18 is tensioned by four rollers: 2 and a belt tension roller 13. Two motors 14 and 19 with reduction gears are attached to the upper frame 4, and the power of the motors 14 is transmitted to the drive belt roller 12 via a sprocket 15, a chain 16, and a transmission shaft 17, Rotate. This drive belt 18 and the upper plate belt 9
are in close contact with each other, and the friction causes the upper plate belt 9
rotates. As shown in FIG. 3, the motor 19 rotates a transmission shaft 21 in conjunction with a chain 20, and the transmission is transmitted to a worm gear 22 at the tip of the shaft. A worm wheel 23 meshing with the worm gear 22 is coaxially fixed to a sprocket 24, as shown in FIG. Upper plate 7
Since the chain 10 connected to the sprocket 24 meshes with the sprocket 24, when the first motor 19 rotates, the upper plate 7 slides. Depending on the rotation direction of the motor 19, this upper plate 7 is moved relative to the upper frame 4.
In FIG. 5, drive belts 18 are provided on both sides of the upper frame 4 in the longitudinal direction, so that when a patient rides on the transfer belt 9, The weight is intended to further strengthen the close contact between the transfer belt 9 and the drive belt 18, thereby increasing the frictional force. If the weight of the patient increases, the rotational driving force of the transfer belt must be increased, but with friction transmission, slipping is likely to occur, but with this mechanism, the friction force increases due to the increased weight, so it is reliable. It is possible to rotate the transfer belt 9. This type of conventional patient transfer/stretcher structure has two upper plates (corresponding to item 7 of the present invention).
A transfer belt (corresponding to item 9 of the present invention) was wrapped around each of them and rotated. For this reason, the front and back surfaces of the two upper plates were in frictional contact with each other, receiving the weight of the human body. In addition, since the upper plate bends under the weight, the upper frame (4 of the present invention)
Since the surface of the transfer belt came into contact with the belt (which corresponds to

In the present invention, since the upper plate 7 has a single-piece structure and the drive belt 18 protrudes above the table base portion by a certain distance, the upper plate 7
The transfer belt 9 wrapped around the drive belt 18 is in direct contact with the drive belt 18 and does not touch the upper frame 4, so the friction caused by the rotation of the transfer belt 9 is on the upper plate 7. Since only the front side and the back side are in contact with the two narrow drive belts 18, the frictional contact surface is reduced by about 2/5 compared to the conventional structure. Therefore, the load on the drive motor is greatly reduced, and it is possible to use a small and lightweight motor. When used as a stretcher, this reduces the labor required to transport a patient from the operating room to the recovery room or from the hospital room to the operating room, reducing the burden on nurses.
Furthermore, since the load on the motor is reduced, the consumption of the battery, which is the power source for the stretcher, is reduced, and the battery charging period is extended several times, making maintenance easier.

In addition, a resin plate with a small friction coefficient is attached to the entire upper side of the upper plate 7, and the resin plate is attached only to the lower side where the drive belt 18 contacts, thereby reducing the rotational frictional resistance of the transfer belt 9. are doing. In addition, if a carbon plate consisting of four layers is pasted on top and bottom with foamed resin as a core material to form a single plate for the upper plate 7, the tensile and compressive loads that occur during deflection can be reduced. Since the carbon fiber absorbs the deflection, the amount of deflection is extremely small compared to other materials in terms of weight ratio, and there is a significant difference, and the amount of deflection of the plate when the transfer belt 9 starts to protrude with a heavy patient on it. Since the number of patients is small, the distance between the bed and stretcher to which the patient is transferred is small, and the patient can be transferred with less anxiety and pain. Furthermore, even when placed on a patient, it does not bend and come into contact with the bed, etc., so the patient can be scooped up or lowered with a single transfer belt plate. In addition, with the conventional two-panel structure, when lowering a patient, the upper belt wraps sheets and the patient's nightgown from the top to the inside, and the lower belt wraps the patient's nightgown from the bottom to the inside. This was often dangerous and required re-operation.
With the single upper plate system of the present invention, there is no lower belt plate for sheets etc. to be caught in, so there is no chance of cloth etc. being caught in the frame. Even when the sheets are brought together, the frame does not lift the sheets up and roll them in, so they sag under the weight of the sheets and other fabrics and do not get caught.
In addition, the belt tension roller 13 that adjusts the frictional force between the drive belt 18 and the drive belt roller 12 can be used to cope with changes in the belt over time.Furthermore, mechanical complexity can be avoided, and power transmission by a chain can be used. Since the power is transmitted by friction between belts, it is extremely lightweight and has great features as a patient transfer device or a patient transfer stretcher.

In the device of the present invention configured as described above,
By converting the speed of these two operations: sliding the upper plate 7 on which the patient is placed left and right and rotating the patient transfer belt 9 wrapped around the upper plate 7, loading and moving the patient from both sides, The lowering operation will be explained with reference to FIG. 6, A, B, C, D, and E.

When the upper plate 7 is slid in the direction of the arrow at a speed of, for example, 1 cm/s as shown in Figure A, the lower surface of the patient transfer belt 9 is slid in the direction of the arrow at a speed of 2 cm/s. When the belt is rotated, the upper surface of the belt does not move, and the upper plate 7 around which the belt 9 is wrapped goes under the body of the patient P. When the body of the patient P is on the belt 9, as shown in Figure B, By rotating only the belt 9, the patient P is moved to the opposite side of the upper plate 7.
Then, as shown in Figure C, if the protruding upper plate 7 is slid to the opposite side at a speed of 1 cm/s and the lower surface of the belt 9 is rotated at the same speed of 1 cm/s, the patient P is placed in the same position. The upper plate 7 will protrude to the opposite side while being placed on the holder. From this state, as shown in Figure D, while sliding the upper plate 7 back to its original side at a speed of 1 cm/s, the lower part of the belt 9 is rotated in the same direction at a speed of 2 cm/s, and the patient P is placed on the spot. Only the belt 9 integrated with the upper plate 7 returns to its original position on the stretcher.

As described above, in the present invention, the drive shaft is thick and long to withstand bending stress because the conventional power transmission drives a full-plane drive belt. By providing two belts at a distance from each other on both sides of the upper plate 4 in the longitudinal direction, the drive belt 18 receives the patient's weight received by the transfer belt 9 intensively.
By increasing the close friction force between the transfer belt 9 and the transfer belt 9, power can be transmitted even if the contact area becomes small when the transfer belt 9 is pushed out to one side. The shaft is thin and lightweight, and mechanically it has a very simple structure that avoids complex mechanisms, has a small number of parts, and has great practical effects such as being lightweight and easy to use.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a patient transfer stretcher using the present invention, Fig. 2 is an explanatory view of the patient transfer belt and drive belt portion installed on the upper frame of the stretcher, and Fig. 3 is a plan view of Fig. 2. Figure 4 is an explanatory diagram of the structure of power transmission for sliding the upper plate. Figure 5 is an explanatory diagram of the relationship between the patient transfer belt installed on the upper frame and the belt that frictionally drives it. Figures A, B, C, D, and E are explanatory views of the operation of loading and unloading a patient on the patient transfer belt wound around the upper plate. DESCRIPTION OF SYMBOLS 1... Cart, 2... Elevating link, 4... Upper frame of the cart, 5... Chain block, 7... Upper plate installed on the upper frame, 8... Belt rotating roller,
9... Transfer belt, 10... Chain, 11...
Drive belt block, 12...Belt roller, 1
3... Belt tension roller, 14... First motor for rotating the drive belt, 15... Sprocket, 16... Chain, 17... Transmission shaft, 18...
... Drive belt, 19 ... Second motor that interlocks and drives the upper plate, 20 ... Chain, 21 ... Transmission shaft, 22 ... Worm gear, 23 ... Worm wheel, 24, 25 ... Sprocket.

Claims (1)

[Scope of utility model registration request] A rotatable endless patient transfer belt 9 is placed over the entire upper plate 7 on which the patient lies supine, and driving roller blocks 11, 11 are provided on both sides of the upper frame 4 in the longitudinal direction as means for rotating this belt. , These drive roller blocks are provided with drive rollers 12 at the front and rear, and an idle roller 13 in the middle, and a drive belt 18 is applied to these. The drive belt 18 is rotated by the power of the upper frame 4 through the chain 16 and the transmission shaft 17.
2 spaced apart on both sides about 1/4 of the length of the
The two drive belts 18 and the upper moving belt 9 are brought into close contact with each other, and the friction causes the power to be transmitted and rotated to the transfer belt 9. The power of the second motor 19 causes the chain 20 and the transmission shaft 21 to
The sprocket 24 fixed to the worm wheel 23 meshing with the worm gear 22 at the tip of the shaft is rotated through the worm gear 22, and the chain 10 connected to the upper plate 7 is pulled by the rotation of the sprocket 24. A patient transfer device in which the upper plate 7 is made to protrude to any side on both sides.