JPS59135060A - Patient stretcher introducing and retracting apparatus of bath tub - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that allows a patient who requires bed rest to lie supine on a stretcher and mechanically enters and exits the bath between a patient carrier and a bathtub. The movement is performed smoothly in one motion without pitching or shaking during the process, and the movement trajectory follows the cam surface provided on the device to eliminate the patient's sense of instability and fear and adapt to the structure of the bathtub. The present invention relates to a device that can move in a traveling shape.

When nurses are assisting patients with burns or extremely weakened conditions by bathing them in hot water, special attention must be paid to peeling the burnt skin and preventing fractures. A conventional device for bathing such a patient in a bathtub is provided with an elevating and lowering mechanism that cantilever-supports a stretcher at one end of the bathtub, moves and places the stretcher on the side of a patient transport vehicle that has been pushed to the outside of the side wall of the bathtub, When a patient is placed on this stretcher, the stretcher is raised vertically above the upper edge of the bathtub side wall and stopped, then moved laterally to a position directly above the hot water in the bathtub using the start switch, and then stopped at a position directly above the bathtub. An elevating and lowering mechanism has been proposed in which the device is vertically lowered into hot water using a starter switch. With this mechanism, the stretcher moves back and forth in a shape of a letter from a position close to the side wall of the bathtub, so that disabled patients who are unable to stand up can bathe comfortably without feeling anxious, and the bathtub has a compact rectangular parallelepiped shape with a small amount of hot water. can. However, the shock caused by rapid speed changes when the stretcher, which is supported by one cantilever and moves, is stopped and started by a switch, is extremely severe for burn patients.

Due to the above situation, a crank mechanism was recently installed on the outside of the end wall of bath 1, and a stretcher was fixed to the end of this crank arm.
By extending the character-shaped support frame horizontally and rotating the crank arm, the stretcher moves in an arcuate trajectory between the position of the transport vehicle and the inside of the bathtub, without having to stop, change direction, or start. Devices have been proposed in which this is done through motion.

However, with such a configuration, the stretcher enters and descends into the bathtub along an arc-shaped trajectory, so a rectangular parallelepiped bathtub not only increases the width and requires a corresponding amount of hot water, but also moves upward in an arc. The moved stretcher rises to a position with a larger vertical distance than the upper edge of the bathtub surrounding wall, causing a sense of anxiety and fear for the patient, and when it descends further and stops on the plywood side of the transport vehicle, it rises to a position with a larger vertical distance than the upper edge of the bathtub side wall. The patient was in a distant position, and the patient was unable to shake off his anxiety.

The device of the present invention eliminates the above-mentioned defects.

The gist of this is that the movement trajectory of the stretcher consists of vertically moving parts on both sides and horizontally in the center, with the corners moving in an arc shape, making the whole move in an inverted U-shape, and the patient feels anxious. In addition, it moves smoothly from the side of the transport vehicle to the inside of the bathtub in one motion, so even burn patients do not have to suffer shock while on a stretcher. The purpose of the present invention is to propose a device that can change the locus of movement of the stretcher into a trapezoid or other shape in response to changes in the shape of the bathtub or when the transport means is changed to a wheelchair. An embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 denotes a substantially rectangular bathtub supported by supporting legs 2. A housing 3 housing a mechanism is disposed outside one end wall of the bathtub 1, and an inverted U-shaped through hole 6 is bored in the front wall 4 of the housing 3 along the surface of the cam 5. It is set up. At the tip of the support shaft 7 protruding from the through hole 6, an arm 9 supporting the stretcher 8 is attached to the straddle member 1.
It is fixed horizontally via o. The stretcher is provided with a foot plate 11 at the front end, a foldable handle 12 at both ends, and a head pillow 13.

As shown in FIGS. 3 to 5, the mechanism inside the housing 3 is equipped with an electric motor 14 equipped with an electromagnetic brake and capable of forward and reverse rotation, and a belt 16 is wound around the output shaft 15 of the electric motor 14. A pulley 17 is provided, and the belt 16 is wound around a pulley 19 fixed to the input shaft of the decelerator 18. Reducer 18
A chain 22 is wound around a chain wheel 21 provided at 2 degrees of the output shaft.

This chain 22 is wound around a chain wheel 25 at the rear end of a transmission shaft 24 mounted on a pair of bearings 23. A drive chain wheel 26 is provided at the tip of the transmission shaft 24. This drive chain wheel 26 is arranged close to one side of the inner surface of the front wall 4.

A driven chain wheel 27 is disposed on the other side corresponding to this. Chain measurement Jt26. ．． A rotating shaft 29 mounted on a pair of bearings 28 is provided at the center of the rotating shaft 27, and the base end of an operating rod 30 is fixed to the distal end side of the rotating shaft 29. on the other hand.

A guide plate 31, which is formed in a semicircular shape with the rotation axis as the center and the outer peripheral edge of the chain wheel 26 or 27 as a radius, is erected along the same plane as the chain wheel 26, 27. And these chain wheels 26.27
, the roller chain 32 is wound around the guide plate 31. The operating rod 30, which is reciprocated by the roller chain 32, has a mounting member 33 protruding from its tip side in front of the device, and a pair of pawls 34 extending from the mounting member in the direction of the rotating shaft 29. .

The pair of pawls 34 are engaged with the roller gap of the chain 32, and are driven by the reciprocating drive of the chain 32 to achieve stable reciprocating rocking without pitching. The operating rod 30 is formed into a tubular shape, and a column 35 is inserted therein via a bearing so that it can be expanded and contracted.

A support shaft 7 integral with the stretcher arm 9 is inserted into the head 36 of the column 35 . The head portion 36 of the column 35 is structured so that it will not be damaged by a spherical bearing 37 even if the support shaft 7 is bent due to the load of the stretcher.

On the same surface as the guide plate 31 and on the outside in the radial direction, the above-mentioned inverted U-shaped cam 5 is erected via a holding table 38,
When the operating rod 30 is swung by the chain 32, the support shaft 7 inserted into the column head 36 moves along the cam 5. Upright members 39 provided at intervals on both rows of the cam 5
is for guiding the support shaft 7 in the vertical direction along the outer edges of the vertical portions 5a-, 5c of the cam 5.

To explain the mechanism for holding the support shaft 7 so as to be able to move vertically and horizontally, a pair of beam members 41 are mounted on both side walls of the casing 3 with a space between them above and below.

A mounting frame portion 4 is inserted into both girders 41 so as to be movable in the horizontal direction.
2 is provided with a rectangular horizontal moving frame 44 having guide grooves 43 made of channel steel on both sides.

A substantially rectangular lifting frame 45 is fitted into the horizontal movement frame 44 with rows 246 at its four corners so as to be vertically movable in the guide groove 43 . The above-mentioned support shaft 7 is fixedly provided on the front surface of the elevating frame 45 so as to face forward.

A chain 4 is attached to a chain wheel 48 provided at the rear end of the rotating shaft 29.
9 is wound, and this chain 49 is wound around a chain wheel 52 of a support shaft 51 which is supported by a pair of bearings 5o. A brake pan (53) is wound around a brake P ram (52) provided on this support shaft, and the tension can be adjusted at both ends of the brake pan (P) with coil springs (55) on a support base (54). The structure is designed to tighten.

The present invention configured as described above will be explained in detail.

The patient on the hospital room pet is pushed to the side of the stretcher 8 placed on the outside of the bathtub 1 at the transport stop 56.

Then, with the help of a nurse, he was transferred onto a stretcher.

The patient lying supine on the stretcher 8 is bathed using a bathing switch (not shown) provided at an appropriate position on the housing 3.

The position of the operating rod 3o shown in FIG. 4 shows a state in which the stretcher 8 with the patient lying on its back is lowered to the bottom wall of the bathtub 1, and the effect of the mechanism for leaving the bath from this position will be explained. do. When the electric motor 14 is reversely rotated and the chain 32 is rotated to the left using the exit switch provided at an appropriate location, 1 actuating rod 3
0 swings upward while the column 35 extends, and the support shaft 7 is pushed upward along the outside of the vertical portion 5a of the cam 5 by the collar 58 which includes a bearing.

At this time, the right side of the claw 34 of the operating rod 30 is connected to the chain 3.
It engages with the left peripheral surface of roller No. 2 and is pushed up.

The chain 3 runs along the periphery of the semicircular guide plate 31.
The point of force (claw position) at which 2 drives the operating rod 30 is approximately three times farther from the rotation axis than the point of force in a case where a chain wheel with a small diameter is directly connected to the rotation axis 29 and driven by a chain, so it is small. Even when driven by an electric motor with a driving power factor, the running movement of the chain can smoothly and quietly push up the support shaft 7 without causing any pitch. During this time, the elevating frame 45, which is integral with the support shaft 7, only rises. When the support shaft 7 passes through the curved part 40 from the vertical part 5a of the cam and reaches the horizontal part 5b, the horizontal movement frame 44 moves to the left.

In Fig. 3, when the swinging actuating rod 30 tilts to the left from the upright position, the claws 3 of the actuating rod 30 tilt due to the load of the stretcher on which the patient is placed.
4 has its left side surface pressed into engagement with the right circumferential surface of the roller of the chain 32. However, even when changing the pressure engagement force with the cam, the main load of the support shaft 7 is held on the horizontal part 5a of the cam, and the brake P ram 52 always tensions the running chain 32 so that it does not loosen. Therefore, no pitching phenomenon occurs when the operating rod moves.

When the operating rod moves and the support shaft 7 descends along the curved portion 40' of the cam 5, the load of the stretcher is applied in the running direction of the chain 32, causing the chain to rapidly accelerate and descend, causing a chopping phenomenon. However, the support shaft 7 slowly descends due to the running chain resistance/resistance force of the brake P ram 52, and the patient lying supine on the stretcher is not subjected to any shock to the body. This also ensures that even if the chain 32 breaks due to aging, there is no danger as the stretcher will descend slowly as well.

The above-mentioned effects of the stretcher during the bathing process have exactly the same effects during the bathing process.

In the apparatus of the present invention, a transport vehicle is used to transport the patient from the hospital room to the side of the bathroom bathtub, but the present invention is not limited to this, and a patient with upper body burns may use a wheelchair. In the case of a wheelchair, the seat plate is usually at a lower position than the plywood of the transport vehicle, but the stop position of the stretcher that lowers the vertical cam portion 5c outside the bathtub may be placed slightly lower. The stopping means is a limit switch or the like to slowly stop the motor.

Further, although the cam used in the device of the present invention has an inverted U-shape, the shape may be modified as long as it is within the extendable range of the column of the operating rod. For example, if stairs, handrails, etc. are provided on the inside and outside of the side wall of the bathtub, the corners may be curved to form a ladder shape.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of the device of the present invention, FIG. 2 is a front view of FIG. 5 is a partially cutaway side view of FIG. 3, and FIG. 6 is a partially enlarged front view showing a state in which the pawl provided on the operating rod is engaged with the drive chain. 1... Bathtub, 3... Housing% 5... Cam, 7...
・Support shaft, 8...Stretcher, 9...Arm, 10...
Hakama member, 14... electric motor, 18... decelerator, 26.
... Drive chain wheel, 27... Driven silver! , 29... Rotating shaft, 30... Operating rod, 31... Guide plate, 32... Roller chain, 34... Claw, 35... Column, 36
... Column head, 41 ... Girder material, 44 ... Horizontal movement frame, 45 ... Lifting frame, 52 ... P ram for brake.

Claims (1)

[Scope of Claims] An apparatus for entering and exiting a bath by drawing a desired movement trajectory while holding a stretcher patient supine between the inside of a bathtub and a patient to be transported outside the bathtub. The casing provided outside one end of the bathtub is equipped with an elevating frame interposed in a horizontal moving frame, and a horizontal support shaft supporting the stretcher on the shore is fixed to the front of the elevating frame. Inside, a driving chain wheel and a driven chain wheel connected to a forward and reverse rotation drive source are disposed at a distance in the lateral direction. A semicircular guide plate whose radius is the outer periphery of the chain wheel is erected perpendicularly along the surface of the thumbtack wheel from the center position between the thumbtack wheels, and a drive chain that runs back and forth is connected between the thumbtack wheels and the guide plate. A working rod fixed to the front end of a rotating shaft arranged in the center between the thumbtack wheels has a protruding pawl that engages with the drive chain, and the head of the column is telescopically inserted into the working rod. The stretcher support shaft is interposed in the part, and a cam is provided for guiding the support shaft along the desired movement trajectory by the reciprocating swing of the operating rod, and a cam is provided at the rear end of the rotary shaft. A bathing device for a patient stretcher, characterized in that it is equipped with an adjustable brake mechanism that controls the swinging of an operating rod.