FR2805988A1 - Tilting bed esp for medical use has mattress supporting frame moved by drive with motor, reduction gear and arm - Google Patents

Abstract

The bed consists of a base frame (112), uprights (114), a mattress supporting frame (115) and a drive mechanism with a motor (118), reduction gear (119), and an output shaft (121) and an arm (122). The upper end of the arm is connected to the output shaft so that it is set vertically when the mattress frame is horizontal, while a guide (124) on the base frame interacts with a roller on the arm's lower end, causing the mattress frame to tilt as the output shaft rotates.

Description

The present invention relates to a rocking bed which allows a rest frame (stretching section) to swing to the right and to the left and, more particularly, to a rocking bed for a medical use which is able to rock according to large angles.

A conventional rocking bed, like that shown in FIG. 13, is of a type of gear drive where a rest frame 4 supported by uprights 2 on a base frame 1 by a tilting shaft 3 can swing upwards. and downward on each side when a worm 12 meshing with a worm wheel which is integrated in the tilting shaft 3 rotates forward and backward.

In addition, a first rotation shaft 13 which is integrated in the auger 12 is rotated by an electric motor 20A installed in a driving section 20. The driving force of the motor 20A is transmitted to the shaft 13 by a reduction and inverter mechanism 20B, an output shaft 20a, a gear coupling 21, a first transmission shaft 15, bevel gear shafts 16 and 18, a second rotation shaft 17 and spur gears 14 and 19 .

In the tilting bed mentioned above, the rest frame 4 is tilted by a transmission mechanism which consists solely of a gear transmission mechanism. This is advantageous from the point of view of cost reduction, but at the same time it causes problems since the gears make a lot of noise during operation and the size of the electric motor, as a power source, is greater. and because of this, the total cost is high.

The present invention has been made to overcome these problems, and its purpose is therefore to provide a rocking bed, where the size of the engine is reduced and the noise is reduced during the operation of a force transmission mechanism. training, where a rest frame, on which will be installed a mattress, can swing to the right and to the left correctly, while being of a simple construction.

This object is achieved according to the invention a rocking bed which comprises a base frame of the uprights erected respectively to the two end portions of the base frame, a rest frame for installing a mattress on it, which is supported on portions of 'upper end of the uprights' a swinging manner to the right and to the left thus a drive mechanism for tilting the frame of rest, where the drive mechanism comprises a motor installed under the rest frame, a coupled gear reducer to a motor rotation shaft an output shaft protruding from the reduction gear in parallel with a tilt axis of the rest frame below the tilt axis, an arm having an upper end portion thereof secured to a distal end of the output shaft to be suspended vertically when the rest frame is in a horizontal position, an element vertical guideway on the base frame for guiding only vertically a guided member on a lower end portion of the arm and a motor control section for rotating the motor forward and backward such that forward and backward rotation of the output shaft allow the rest frame to swing to the right and to the left.

In another aspect, the present invention provides a rocking bed where the element guided on the lower end portion of the arm is constructed by an independent roller rotatably supported on the lower end portion of the arm, and vertical guide member has a pair of guide surfaces for guiding the roller vertically, the guide surfaces closely flanking the roller on both sides of the roller.

In yet another aspect, the present invention provides a rocking bed where the element guided on the lower end portion of the arm comprises a roller support member rotatably supported on the lower end portion of the arm and a pair of rollers rotatably supported on the roll support member, and the vertical guide member is formed as a vertically extending guide bar which is clamped between the pair of rollers.

In yet another aspect, the present invention provides a tilting bed where the engine control section includes a selection switch for reversing the rotation of the engine when the rest frame reaches a predetermined maximum tilt angle based on a signal. detected by an angle sensor to detect an angle at which the rest frame is tilted.

In yet another aspect, the present invention provides a tilting bed where a tilt angle setting device for setting a maximum tilt angle of the rest frame to a desired tilt angle is connected to the tilt section. motor control.

In yet another aspect, the present invention provides a tilting bed where a motor rotation speed adjusting device for adjusting a cycle to tilt the rest frame to the right and to the left is connected to the motor control section.

When, in the tilting bed described above, the output shaft of the reduction gear coupled to the rotation shaft of the motor rotates smoothly in the drive mechanism which is installed under the rest frame for receiving a mattress, the arm attached to the distal end of the output shaft on its upper end portion at right angles to the output shaft begins to rotate thereby causing the guided member on the lower end portion of the arm to receive a reaction force resulting in its abutment against the vertical guide member, and this further causes the arm to pivot gently to the side thereby allowing the rest frame to tilt slowly while increasing its angle of inclination when the guided element rises along 1 vertical guide element.

Then, since the motor control section controls the motor to turn forwards and backwards, the rest frame begins to swing correctly to each side.

In addition, when the element guided on the lower end portion of the arm is constructed as an independent roller rotatably supported on the lower end portion of the arm, and when the vertical guide member whose pair of surfaces is flanking tightly the roller on both sides of the roller is provided, the lower end portion of the arm can move up and down extremely gently thereby allowing the rest frame, to install a mattress on it, to swing to the right and to the left smoothly and quietly.

On the other hand, when the element guided on the lower end portion of the arm comprises the roller support member rotatably supported on the lower end portion of the arm as well as the pair of rollers supported in a manner. the guide bar serving as a vertical guide member is clamped between these rollers, the lower end portion of the arm moves up and down extremely gently and, during With such movement, the pair of rollers can move vertically while rotating in opposite directions to each other so that they function properly in contact with the guide bar without play at all times. Thus, the rest frame can swing to the right and to the left smoothly and quietly.

furthermore, when the motor control section includes the selection switch for reversing the rotation of the motor when the rest frame reaches a preset maximum inclination angle based on a signal detected by the angle sensor to detect the angle at which the The rest frame is inclined. The front and rear drive of the motor can be controlled in a suitable manner at any time, and thus an excessive inclination of the rest frame can be prevented.

In addition, when the tilt angle setting device which applies a tilt angle setting signal to adjust the maximum tilt angle of the tilt frame to a desired tilt angle is connected to the motor control section, the maximum inclination angle of the rest frame can be adjusted correctly in accordance with the state of a patient who is lying on the bed, a maximum inclination angle of about 60 degrees can even be adjusted, if necessary, after checking the patient is securely retained on the bed.

 When the engine rotational speed adjuster for adjusting the tilt cycle of the idle frame to each side is connected to the engine control section, the tilt cycle of the idle frame can be changed easily and smoothly allowing thus an optimal adjustment of both the maximum angle of inclination of the rest frame and the position of a patient.

The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the following explanatory description made with reference to the accompanying schematic drawings given solely by way of example illustrating Embodiments of the invention and in which - Figure 1 is a plan view showing a tilting bed, which is an embodiment of the present invention, the mattress being removed therefrom; - Figure 2 is a side view taken along a line AA of the bed shown in Figure 1 - Figure 3 is a front view taken along a line BB of the bed shown in Figure 1 - Figure 4 is a front view representing the bed of Figure 3, a control section being removed therefrom; - Figure 5 is a perspective view in bed shown in Figure 4; - Figure 6 is a front view bed shown in Figure 4 which is inclined; - Figure 7 is a perspective view showing the main part of the bed of Figure 6; Fig. 8 is a front view of the bed; Fig. 6 is further inclined to achieve a maximum inclination angle; - Figure 9 is a perspective view showing the main part of the bed of the figure; Figure 10 is a side view, on a larger scale, of a bed driving mechanism shown in Figure 2; - Figure there is a block diagram showing a control system of the bed above; Fig. 12 is a front view showing a modified example of the above tilting bed driving mechanism; and - Figure 13 is a front view showing the main part of a conventional rocking bed.

An embodiment of the present invention will now be described with reference to the drawings. As shown in FIGS. 1 to 5 and FIG. 10, uprights 113 and 114 are raised at the two end portions of a base frame 112 which has wheels 111. A rest frame 115 on which a mattress must be installed, is supported on the upper end portions of the uprights 113 and 114 so that it can tilt to each side about a pivot 116 (see Figure 4). It should be noted that the mattress on which a patient can lie is removed from the rest frame 115 in these figures. In addition, expansion cylinders 111a are provided to adjust the height of the bed by driving wheel support members 111, respectively.

A drive mechanism G for tilting the rest frame 115 (see FIGS. 2 and 10) comprises an electric motor 118 which is installed under the rest frame 115 by a support member 117, a planetary reduction gear 119 (whose ratio reduction gear is from 1 to 10) serving as a first reduction gear coupled to a rotation shaft of the motor 118, and a worm gear reduction gear 120 (whose reduction ratio is 1 to 150) serving as a second reduction gear coupled to the reduction gear 119. Thus, the two reduction gears achieve a total reduction ratio of 1 to 1500.

An output shaft 121 of the worm gear reducer 120 protrudes parallel to a tilting axis 115a (see FIG. 5) of the rest frame 115 below the same axis 115a and has an arm 122 provided at its end. distal. The arm 122 is securely attached to the distal end of the output shaft 121 on an upper end portion thereof at right angles to the shaft 121, and thus the arm 122 is suspended vertically when the rest frame 115 is held in a horizontal position.

The arm 122 also has an independent roll 123 at its lower end portion. The roller 123 which functions as a guided member, can be guided only vertically by a vertical guide member arranged on the base frame 112. The guide member comprises a pair of parallel guide surfaces 124a closely flanking the roller 123 on both It should be noted that the roll diameter 123 is 0.2 mm smaller than the distance between the pair of guide surfaces 124a, whereby a very large gap is made between the roll 123 and each surface 124a opposite to that roll. this.

The drive mechanism G which causes the rest frame 115 to swing to the right and to the left, a construction above.

More particularly, when the motor 118 mounted on the drive mechanism G rotates, the output shaft 121 whose speed is adequately reduced by the planetary reduction gear 119 'worm gear reducer 120 begins to rotate slowly together with the arm 122 which is fixed to the shaft 121 at its upper end.

Then, as shown in FIGS. 6 and 7, the rest frame 115 swings around the pivot 116 when the roll 123 provided on the lower end portion 122 is lifted up along the vertical guide element 124 while being guided by the element 124.

Further, to swing the rest frame to the right and to the left by forward rotations of the output shaft 121, a motor control section 125 (see Fig. 11) is made to rotate the motor. 118 forward and backward. The motor control section 125 has a selection switch which causes the motor 118 to reverse its rotation when the rest frame 115 reaches a maximum inclination angle (e.g., 62 degrees, see FIGS. 8 and 9) based on a signal detected by the angle sensor 126 which detects the angle at which the rest frame 115 is inclined with respect to its horizontal position.

Further, a tilt angle setting device 127 which adjusts the maximum tilt angle of the rest frame 115 to a desired angle is connected to the motor control section 125 so that a signal detected by the angle sensor 126 is applied to the motor control section 125 by the inclination angle setting device 127 in this embodiment.

In addition, an adjustment device 130 of the rotational speed of the motor (see FIG. 11) which regulates the tilting cycle of the rest frame 115 to the right and to the left (partial rotation) is also connected to the control section of the motor. motor 125 and applies a speed control signal to control section 125.

When, in the tilting bed according to the embodiment described above, the output shaft 121 of the reduction gears 119 and 120 coupled to the rotation shaft of the motor 118 rotates smoothly in the drive mechanism G which is installed under the rest frame 115 provided for the installation of a mattress, the arm 122 is securely attached to the distal end of the output shaft 121 on its upper end portion at right angles to the shaft 121 begins to rotate as so that the roller 123 on the lower end portion of the guide arm 122 abuts the vertical guide member 124 and thereby receives a reaction force therefrom. This causes the arm 122 to pivot gently to the side allowing the roller 123 to move up the vertical guide member 124. When the roller 123 rises, the rest frame 115 tilts without making noise, increasing its angle of inclination.

Then, when the motor control section 125 commands the motor 118 to reverse its rotation, the rest frame 115 begins to swing to the right and to the left.

In addition, the guided element provided on the lower end portion of the arm 122 is the roller <B> 123 </ B> which an independent element rotatably supported on such an end portion arm 122, the Vertical guide member 124 having the pair of guide surfaces closely flanking roll 123 on both sides of roll 123 is also provided. Because of this construction, the lower end portion of the arm 122 can move up and down extremely gently thereby allowing the rest frame 115, for receiving mattresses, to tilt to each side smoothly and quietly.

On the other hand, the motor control section 118 includes the selection switch which reverses the rotation of the motor 118 when the rest frame 115 reaches a pre-established maximum inclination angle based on a signal received from the sensor. angle 126 which detects the angle at which the rest frame 115 is inclined. Therefore, the motor is controlled to rotate appropriately both forward and backward at all times thereby preventing excessive inclination of the rest frame 115.

Further, the tilt angle setting device 127 which applies tilt angle setting signal to adjust the maximum tilt angle of the rest frame 115 to a desired angle, is connected to the section 8. As a result, the maximum angle of inclination of the rest frame 115 can be set correctly in accordance with the state of a patient lying on it and it can even be set at a desired angle. maximum inclination that is around 60 degrees, after checking the patient is safely holding the bed. Further, when the engine speed setting device 130 for adjusting the tilt cycle of the idle frame 115 to the right and to the left is connected to the control section 125 of the engine, the tilt cycle of the engine The rest frame 115 can be changed easily and smoothly so that not only the maximum angle of inclination of the rest frame 115 can be appropriately adjusted, but also the position of the patient can be changed optimally.

It should be noted that it is possible to adopt a modified example shown in FIG. 12, which is a guided element which is arranged on the lower end portion of the arm. That is to say, the guided element attached to the portion the lower end of the arm 122 which is securely attached to the output shaft 121 on its upper end portion may consist of a roll support member 128 rotatably supported on the lower end portion of the arm 122 by a pivot 128a, and a pair of rollers 3a and 123a rotatably supported on the roll support member 128. A guide bar 124 functions as a vertical guide member extending vertically while being tightened. between these rollers 123a and 123a can be raised on the base frame 112.

In the construction wherein 1 member guided on the lower end portion of the arm 122 includes a roller support member 128 rotatably supported on the lower end portion of the arm 122 and the supported pair of rollers 123a. in a rotational manner on the roller support member 128 where the guide bar 124 as the vertical guide member is clamped between these rollers 123a, the lower end portion of the arm 122 is movable up and down as well. an extremely gentle way. In addition, during a movement of the arm 122, the pair of rollers 123a can move up and down while rotating in opposite directions, and this allows the rollers 123a to function properly in contact with the guide bar 124 without there being a game with the guide bar at any time, and the rest frame 115 can therefore swing to the right and to the left gently and calmly.

As described in detail above, the rocking bed of the present invention achieves the following advantages.

(1) when the output gear gear output shaft coupled to the motor rotation shaft rotates smoothly in the drive mechanism which is installed under the rest frame, to receive the mattress, the arm firmly attached to the distal end of the output shaft on its upper end at right angles to the output shaft begins to rotate thereby causing the guided element on the lower end portion of the arm to receive a reaction force resulting from its stop against the vertical guide member, and this further causes the arm to pivot gently to the side thereby allowing the rest frame to tilt calmly while increasing its tilt angle by the vertical movement of 1 guided member the along the vertical guide element. Then, when the motor control section commands the motor to reverse its rotation the rest frame begins to swing to the right and to the left properly. Thus, as a result of this construction, the size of the motor can be decreased and noise can be reduced, and furthermore the rocking bed structure can be remarkably simplified in comparison with the conventional all-gear bed.

(2) When the guided member on the lower end portion of the arm is formed into an independent roller rotatably supported at the lower end of the arm and the vertical guide member having two flanking guide surfaces. tightly the roller on both sides of the roller is provided, the lower end portion of the arm can move up and down extremely gently thereby allowing the rest frame, intended for the reception of the mattress, to tilt to each side smoothly and calmly.

(3) When the guided member on the lower end portion of the arm includes the roller support member rotatably supported on the lower end portion of the arm and the rotatably supported pair of rollers. on the roll support member, and when the guide bar functioning as a vertical guide member is arranged to be clamped between these rollers, the lower end portion of the arm moves up and down extremely gently. In addition, during such a movement, the pair of rollers can move up and down while rotating in opposite directions so that the rollers work properly, at all times, in contact with the guide bar without play. rest can swing to the right and to the left smoothly and calmly.

(4) When the motor control section includes the selector switch to reverse the rotation of the motor when the rest frame reaches a preset maximum inclination angle based on a detected signal from the angle sensor which detects the angle according to the rest frame is inclined, the front and rear drive of the engine can be controlled properly at any time, thus preventing excessive inclination of the frame.

(5) When the tilt angle setting device that applies a tilt angle setting signal to adjust the maximum tilt angle of the tilt frame to a desired tilt angle is connected to the motor control section, the maximum angle of inclination of the rest frame can be adjusted correctly in accordance with the patient's 1 state lying on the bed, and a maximum inclination angle of about 60 degrees can even be adjusted, if necessary, after checking that the bottle is safely supported on the bed.

(6) When the engine rotatation speed adjuster intended to adjust the left and right frame tilting cycle is connected to the engine control section, the tilting cycle of the frame rest can be changed easily and smoothly by optimally adjusting the maximum inclination angle of the rest frame and correctly changing the position of a patient.

Claims (6)

<U> CLAIMS </ U> A rocking bed, characterized in that 'comprises a base frame (112); uprights (113, 114) respectively erect two end portions of said base frame (112); a rest frame (115) provided for the installation of a mattress, which is supported on the upper end portions of said uprights in a rocking manner to the right and to the left; and drive mechanism G for tilting said rest frame (115); wherein said drive mechanism comprises a motor (118) installed beneath said reduction gear reduction frame (119) coupled to a rotational shaft of said motor; an output shaft (121) projecting from said reduction gear, in parallel with a tilt axis of said rest frame, below said tilt axis (115a); an arm (122) having an upper end portion attached to a distal end of said fist shaft (121) to be suspended vertically when said rest frame is in a horizontal position; vertical guide member (124) provided said base frame (112) for guiding a guided member provided on a lower end portion of said arm only vertically; and a motor control section (125) for rotating said motor forward and rearward such that forward and reverse rotations of said output shaft allow said rest frame (115) to swing to the right and to the left. Tilting bed according to claim 1, characterized in that said element guided on said lower end portion of said arm is constituted by an independent roller (123) rotatably supporting said lower end portion of said arm, and said vertical guide member (124) has a pair of guide surfaces (124a) for guiding said roller vertically, said guide surfaces closely flanking said roller (12) on both sides of said roller. Tilting bed according to claim 1, characterized in that said element guided on said lower end portion of said arm comprises a roller support member rotatably supported on said lower end portion of said arm (122) as well as a pair of rollers rotatably supported on said roll support member, and said vertical guide member is constructed as a vertically extending guide bar which is clamped between said pair of rollers. The rocking bed according to claim 1, characterized in that said motor control section (125) comprises a selection switch for reversing the rotation of said motor (118) when said rest frame reaches a pre-established maximum inclination angle on the base of a signal detected by an angle sensor provided to detect an angle in which said rest frame is inclined. A rocking bed according to claim 4, characterized in that a tilt angle setting device (127) for setting a maximum tilt angle of said rest frame (115) to a desired tilt angle is connected to said motor control section. The rocking bed according to claim 5, characterized in that a motor rotation speed adjusting device (130) for setting a tilt cycle of said rest frame to the right and to the left is connected to said motor control (125).