JP2007117182A - Elevating/lowering and raising/lowering type motor-driven bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce costs by making main components constituting manual and motor-driven beds in common. <P>SOLUTION: In the elevating/lowering and raising/lowering type bed for which a bottom 6 is supported so as to be raised and brought down by a raising/lowering link 7 on a bed frame 5 supported so as to be elevated and lowered by an elevating/lowering link 4 at the upper part of a truck part 3, a motor-driven actuator 8 is connected respectively between the bed frame and the elevating/lowering link and the bed frame and the raising/lowering link, and the drive side ends of them are separated from the foot side end of the bed frame by a space part 10 and arranged. A control box 11 storing a controller for controlling the motor-driven actuator is arranged on the bed frame corresponding to the space part, a power receiving side member is arranged on the head side of the bed frame, a wiring duct 15 is arranged in the longitudinal direction on the bed frame, and an electric wire 17 is stored and supported. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lifting / lowering electric bed.

  As beds for hospitals and home care, lift-and-relief type beds that can raise and lower the bottom are widely used. The raising / lowering bed is generally composed of a carriage part, a bed frame supported above and below the carriage part by a raising and lowering link, and a bottom supported on the bed frame by a raising and lowering link. The elevating link and the undulating link are driven by an outer cylindrical member that rotatably supports the screw shaft and an inner cylindrical member that is supported by a female screw member that is screwed onto the screw shaft. In addition, actuators configured such that the inner cylinder member can be moved back and forth with respect to the outer cylinder member are widely used. This actuator includes a manual actuator that manually rotates the screw shaft with a crank handle, and an electric actuator that is configured to rotate integrally with an electric motor. A bed that uses the former manual actuator is a manual bed. The bed using the latter electric actuator is called an electric bed. In addition, patent documents 1, patent documents 2, etc. are mentioned as conventional literature regarding an electric actuator.

  It is very effective to reduce the cost to make the main parts composing the manual bed and the electric bed, and the present invention has a major object to make the main parts common. It is.

  First, an example of a manual bed that can be raised and lowered will be described with reference to FIGS. As shown in FIGS. 1 to 3, the manual bed 101 supports a bed frame 105 that can be moved up and down by a lifting link 104 above a carriage unit 103 provided with casters 102. Supports the bottom 106 by the hoisting link 107 so as to be hoistable. The bottom 106 is divided into a back bottom 106a, a waist bottom 106b, a knee bottom 106c, and a foot bottom 106d. The back bottom 106a is supported by the bed frame 105 so as to rotate around the waist bottom 106b, The knee bottom 106c is supported by the bed frame 105 so as to rotate with the back bottom 106a side as a fulcrum, and the knee bottom 106d and the foot bottom 106d are connected to be able to bend. Further, undulation links 107a and 107c are provided below the back bottom 106a and the knee bottom 106c, respectively.

  Manual actuators 108a, 108b, 108c are connected between the bed frame 105 and the hoisting links 107a, 107c and between the bed frame 105 and the lifting link 104, respectively. These manual actuators 108a, 108b, and 108c are composed of an outer cylinder member that rotatably supports a screw shaft as described above, and an inner cylinder member that is supported by a female screw member that is screwed onto the screw shaft. The inner cylinder member is configured to be able to advance and retreat with respect to the outer cylinder member by rotating the shaft. Since this structure is well known, a detailed description of the structure is omitted. The end portions of these manual actuators 108a, 108b, and 108c are arranged at positions spaced from the foot side end portions of the bed frame 105 by the space portion 113, and universal joints 109a, 109b, The operation handles 111a, 111b, and 111c are connected to each other through the connecting rods 110a, 110b, and 110c. The operation handles 111a, 111b, and 111c can be rotated to the outside of the foot side end of the bed frame 105. I support it.

In the above configuration, the operating handles 111a and 111b are rotated to extend and retract the manual actuators 108a and 108b, respectively, so that the back bottom 106a and the knee bottom 106c are moved up and down by a rotating motion, respectively, from the flat state to the undulating state. The bed frame 105 can be moved up and down with respect to the carriage unit 103 by rotating the operation handle 111c to expand and contract the manual actuator 108c. In the figure, reference numeral 112 denotes a mattress placed on the bottom 106.
JP-A-9-206334 JP 2000-217304 A

  When the electric bed is to be configured by sharing the main parts of the manual bed 101 described above, the manual actuators 108a, 108b, 108c, the operation handles 111a, 111b, 111c and the accompanying universal joints 109a, 109b, 109c In place of the connecting rods 110a, 110b, 110c, a control box storing electric actuators and a controller for controlling them, a power receiving part for connecting to a commercial power outlet, a connecting part for a hand controller, etc. It is necessary to install a large number of electric wires such as power supply lines and control lines that connect them.

At that time, there are the following problems.
1. It is necessary to arrange a relatively large control box so that it does not interfere with the electric actuator, and to be able to insert the handle for power failure operation into the electric actuator without interfering with this control box in the event of a power failure.
2. When wiring a large number of electric wires as power supply lines and control lines, it is necessary to prevent the electric wires from interfering with the links and electric actuators that constitute the raising and lowering mechanism.

  The present invention was devised in view of the above problems, that is, an object of the present invention is to provide an electric bed that can rationally configure an electric bed by sharing a manual bed and main parts. It is what.

  In order to achieve the above object, the present invention comprises a carriage part, a bed frame supported above and below the carriage part by a raising and lowering link, and a bottom that is supported by the bed frame so as to be raised and lowered. In the lifting and lowering bed, electric actuators are connected between the bed frame and the lifting link, and between the bed frame and the lifting link, and the drive side end of these electric actuators is separated from the foot side end of the bed frame by a space. A control box storing a controller for controlling the electric actuator is disposed on the bed frame corresponding to the space, and the power receiving member is disposed on the head side of the bed frame, and the longitudinal direction of the bed frame Elevating and lowering type electric bed that is configured to store and support electric wires by arranging wiring ducts Proposed.

  In the present invention, in the above configuration, the wiring duct arranged in the longitudinal direction of the bed frame is divided into the length direction, and the divided wiring duct is arranged to be shifted in the width direction of the bed frame. .

  In the present invention described above, the control box is disposed in the space portion formed at the drive side end of the electric actuator and the foot side end of the bed frame, so that interference with the electric actuator can be avoided. It is possible to easily design an arrangement in which the operation handle and the control box do not interfere during a power failure.

  In addition, a feed line connecting the control box placed on the foot side of the bed frame and the power receiving side member placed on the head side of the bed frame, or a hand operation placed at the end in the width direction of the intermediate position of the bed frame, for example The control lines and other wires connected between the genital connections and the control box can be stored and supported in a wiring duct arranged in the longitudinal direction of the bed frame, so these wires, electric actuators, links, etc. Interference can be prevented, and wiring work can be performed quickly and easily.

  In the above configuration, the wiring duct and control box are not installed, the electric actuator is changed to a manual actuator, an operation handle is installed on the outside of the foot side end of the bed frame so that it can be rotated, and By connecting the driving side end portions of the handle with a universal joint and a connecting rod corresponding to the space portion, a manual bed can be configured using main components.

Next, an embodiment of the present invention will be described with reference to FIGS.
First, FIGS. 4 to 7 show a state before wiring of a feeder line and a control line. FIG. 4 is a plan view, FIG. 5 is a front view, FIG. 6 is a side view, and FIG. . FIGS. 9 and 10 show the state after wiring. FIG. 9 is an enlarged view of a main part of the bottom view, and FIG. 10 is a bottom view.
Reference numeral 1 generally indicates an electric bed according to the present invention, and the electric bed 1 is configured in the same manner as the above-described manual bed.
That is, this electric bed 1 supports a bed frame 5 so that it can be moved up and down by a lifting link 4 above a frame-like carriage section 3 provided with casters 2, and a bottom 6 is provided on the bed frame 5. The undulation link 7 supports the undulation. The bed frame 5 has a structure in which a plurality of frame members in the width direction are provided between frame members in the longitudinal direction. The bottom 6 is divided into a back bottom 6a, a waist bottom 6b, a knee bottom 6c, and a foot bottom 6d. The back bottom 6a is supported by the bed frame 5 so as to rotate around the waist bottom 6b. The knee bottom 6c is supported by the bed frame 5 so as to rotate with the back bottom 6a side as a fulcrum, and the knee bottom 6d and the foot bottom 6d are connected so as to be bent. Further, undulation links 7a and 7c are provided below the back bottom 6a and the knee bottom 6c, respectively.

  Electric actuators 8a, 8b and 8c are connected between the bed frame 5 and the hoisting links 7a and 7c and between the bed frame 5 and the elevating link 4, respectively. These electric actuators 8a, 8b, and 8c are composed of the outer cylinder member that rotatably supports the screw shaft as described above, and the inner cylinder member that is supported by the female screw member that is screwed onto the screw shaft. Is configured such that the inner cylinder member can be moved forward and backward with respect to the outer cylinder member, and electric motors 9a, 9b, and 9c that rotate the screw shaft on the drive side are integrally installed. An operation hole (not shown) is formed for fitting the end of the operation shaft of the crank handle for power failure operation described later to enable the screw shaft to be rotated. Since these electric actuators 8a, 8b, and 8c are well known, detailed description thereof will be omitted.

  The drive-side ends of these electric actuators 8a, 8b, 8c are arranged with the space 10 separated from the foot-side ends of the bed frame 5, and a controller for controlling the electric actuators 8a, 8b, 8c is stored. The control box 11 is arranged on the bed frame 5 corresponding to the space 10. On the other hand, reference numeral 12 is a crank handle 12 for power failure operation that is inserted from the foot side end portion of the bed frame 5 at the time of a power failure, and the end portion is fitted into the operation hole described above of the electric actuators 8a, 8b, 8c. The control box 11 is arranged so that the operation shaft 13 of the crank handle 12 for power failure operation does not interfere.

  On the other hand, the receiving side member 14 connected to the commercial power source is arranged on the head side of the bed frame 5 and the bed duct 5 is provided with the wiring duct 15 in the longitudinal direction from the bed installation mode in a hospital or the like. is doing. In this embodiment, the wiring duct 15 is divided into two parts, the head side and the foot side, and the head side wiring duct 15 h and the foot side wiring duct 15 f are arranged so as to be shifted in the width direction of the bed frame 5. . That is, as shown in FIG. 7, the foot-side wiring duct 15f is arranged near the center in the width direction, and the head-side wiring duct 15h is arranged shifted from near the center to the end direction.

  Further, in this embodiment, connecting portions 16 for a hand operating device, which will be described later, are formed at both ends in the width direction of the intermediate position of the bed frame 5.

  In FIG. 5, reference numeral M denotes a mattress placed on the bottom 6 (6a, 6b, 6c, 6d).

  In the above-described configuration, in the electric bed 1 of the present invention, the power supply line 17a that connects the control box 11 disposed on the foot side and the power receiving side member 12 disposed on the head side, and the hand-operator connection portion 16 described above. The control wire 17b connected between the control box 11 and the control box 11 is stored and supported in the wiring ducts 15h and 15f. Therefore, interference between these electric wires 17a and 17b and the electric actuators 8a, 8b and 8c and the links 4 and 7 can be prevented, and wiring work can be performed easily and quickly. A power cord 21 for connecting to a commercial power source is connected to the power receiving side member 12.

  In the above configuration, in the electric bed 1 of this embodiment, the connector (not shown) of the hand operating device 18 is connected to the hand operating device connecting portion 16 for use. FIG. 11 is a system diagram showing the configuration of the electrical system when the hand operating device 18 is connected to the hand operating device connecting portion 16.

As shown in the system diagram of FIG. 11, commercial power is supplied from the power cord 21 to the controller in the control box 11 via the power receiving member 14 and the power supply line 17 a, and is connected to the hand controller connection portion 16. The electric motors 9a, 9b, and 9c of the electric actuators 8a, 8b, and 8c are driven through the power supply lines 22a, 22b, and 22c by the control signal supplied from the hand controller 18 through the control line 17b. In FIG. 11, the wiring duct 15 is indicated by a two-dot chain line.

  FIG. 12 shows an example of the external appearance of the hand controller 18. The hand controller 18 includes switches SW 1 to SW 8 for operating the raising and lowering of the bottom and a display unit for graphically displaying the undulation state of the bottom. 19 and a display unit 20 for numerically displaying the inclination angle of the back bottom 6a.

  Next, the function of each of the switches SW1 to SW8 will be described. First, the switches SW1 and SW2 are automatic operation switches for performing the undulation operation of the bottom by interlockingly controlling the back bottom 6a and the knee bottom 6c according to a preset sequence. Yes, the switch SW1 is for raising and the switch SW2 is for lowering. The switches SW3 and SW4 are switches for raising and lowering the back bottom 6a, respectively. Switches SW5 and SW6 are switches for raising and lowering the knee bottom 6c, respectively. Further, the switches SW7 and SW8 are switches for raising and lowering the bed frame 5.

Next, a specific example is described in which the switches SW1 and SW2 are used to interlock control the back bottom 6a and knee bottom 6c according to a preset sequence.
First, FIG. 13 is an explanatory diagram showing an operation pattern when the back bottom 6a and the knee bottom 6c in the planar state are raised by the switch SW1, in which the horizontal axis is the angle from the horizontal state of the back bottom 6a, and the vertical axis is The angle from the horizontal state of the knee bottom 6c is shown. In addition, the line segment with an arrow in the figure shows the transition of the angle between the back bottom 6a and the knee bottom 6c, and a black point is shown at the position where the motion pattern changes, and the coordinates (X, Y) at that position are The angle between the back bottom 6a and the knee bottom 6c at that time is shown.

First, at coordinates (0, 0), both the back bottom 6a and the knee bottom 6c are in a horizontal state, that is, the bottoms 6a to 6d are in the state shown in FIG.
When the switch SW1 is turned on in this state, only the knee bottom 6c is raised first, and the state changes along the line segment L1.
Thus, when the knee bottom 6c reaches an angle of 25 °, that is, as shown in FIG. 15, the coordinate (0, 25) is reached, the rise of the knee bottom 6c stops and the rise of the back bottom 6a starts, and the line segment L2 is reached. It moves along. That is, the angle of the knee bottom 6c does not change, and only the angle of the back bottom 6a rises.
When the back bottom 6a reaches an angle of 40 °, that is, the coordinates (40, 25) as shown in FIG. 16, the back bottom 6a continues to rise and this time the knee bottom 6c starts to fall, Transition along L3.
Thus, when the back bottom 6a reaches an angle of 47 ° and the knee bottom 6c reaches an angle of 15 °, that is, the coordinates (47, 15) as shown in FIG. 17, the back bottom 6a continues to rise and the knee bottom 6c descends. Stops and moves along line segment L4. That is, the angle of the knee bottom 6c does not change, and only the angle of the back bottom 6a rises.
When the back bottom 6a reaches an angle of 60 °, that is, as shown in FIG. 18, the coordinates (60, 15) are reached, the back bottom 6a continues to rise and this time the knee bottom 6c starts to fall, It changes along the minute L5. Thus, when the back bottom 6a reaches the preset upper limit angle of 75 °, the back bottom 6a stops rising, and at this time, the knee bottom 6c reaches the horizontal position, that is, as shown in FIG. The bottom raising operation by the interlock control is completed at the position of (75, 0).

The bottom raising operation by the interlock control described above has the following advantages.
a. When the back bottom 6a is raised by turning from the flat state in which all the bottoms are lowered, the knee bottom 6c starts to rise first. The position of the waist of the person who is doing is supported by the knee bottom 6c. Accordingly, even if the back bottom 6a starts to rise and gradually becomes steep in this state, the person who is lying on the back is prevented from slipping down.
b. Assuming that the rise of the back bottom 6a and the rise of the knee bottom 6c continue to proceed as they are, the angle formed by the back bottom 6a and the knee bottom 6c gradually narrows, and the lower abdomen of a person who is lying on their back Is gradually bent, and at the end, for example, it becomes 90 ° or less, so that a feeling of pressure is felt. However, in the above-described ascending operation, the rise of the knee bottom 6c is continuously advanced. However, the angle is limited to a preset ascending position, i.e., an angle, and thereafter is maintained at that position and then descends. Therefore, the angle formed between the back bottom 6a and the knee bottom 6c is an angle, for example, It will not be narrower than 90 °. Therefore, it is possible to prevent the lower abdomen of a person who is supine from being gradually bent by them and feeling a pressure.

  Next, FIG. 20 is an explanatory diagram showing an operation pattern when the back bottom 6a is lowered by the switch SW2 in the ascending position shown in FIG. 19, and the content of FIG. , Which is the same as FIG. 13 except that it goes to the right.

First, as shown in FIG. 19, when the switch SW2 is turned on in the state of the coordinates (75, 0), the back bottom 6a is lowered and the knee bottom 6c is raised and moves along the line segment L6.
The knee bottom 6c stops rising when the angle reaches 10 °, and the back bottom 6a continues to descend.
That is, as shown in FIG. 21, after reaching the coordinates (64, 10), the angle of the knee bottom 6c does not change, only the back bottom 6a continues to descend, and changes along the line segment L7. As shown in FIG. 22, when reaching the coordinates (50, 10), the knee bottom 6c starts to rise again and moves along the line segment L8.
Then, after the knee bottom 6c has an angle of 25 degrees and reaches the coordinates (40, 25) as shown in FIG. 23, the rise of the knee bottom 6c stops and only the back bottom 6a continues to descend, Transition along line L9.
When only the back bottom 6a descends along the line segment L9 and reaches an angle of 19 °, ie, coordinates (19, 25) as shown in FIG. 24, the knee bottom 6c also begins to descend, and this time, Both knee bottoms 6c move down along the line segment L10.
Thus, when the back bottom 6a becomes horizontal, the knee bottom 6c has an angle of 10 °, that is, after reaching the coordinates (0, 10) as shown in FIG. When the knee bottom 6c becomes horizontal, that is, when the coordinate (0, 0) is reached, the descending operation is finished.

  As described above, in this embodiment, even in the lowering operation of the bottom by the interlocking control, the position of the waist of the person who is supine by appropriately raising the knee bottom 6c together with the lowering of the back bottom 6a. Is supported by the knee bottom 6c, so that the position of the person who is supine is prevented from shifting, and the angle formed between the knee bottom 6c and the back bottom 6a is not less than a predetermined value. , It can also prevent the lower abdomen of a person who is lying down from feeling pressure.

  Since the operation when the other switches SW3 to SW8 are turned on is self-explanatory, the description is omitted.

Since the present invention is as described above, there are the following advantages in industrial use.
1. By arranging the control box in the space formed on the drive side end of the electric actuator and the foot side end of the bed frame, interference with the electric actuator can be avoided, An arrangement in which the control box does not interfere can be easily designed.
2. A power supply line that connects the control box arranged on the foot side of the bed frame and the power receiving side member arranged on the head side of the bed frame, for example, a connection part for the hand controller at the widthwise end of the intermediate position of the bed frame Since control wires and other wires connected between the control box and the control box can be stored and supported in a wiring duct arranged in the longitudinal direction of the bed frame, these wires can interfere with electric actuators and links. Can be prevented, and wiring work can be performed easily and quickly.
3. In the above configuration, the wiring duct and control box are not installed, the electric actuator is changed to a manual actuator, an operation handle is installed on the outside of the foot side end of the bed frame so that it can be rotated, and By connecting the driving side end portions of the handle with a universal joint and a connecting rod corresponding to the space portion, a manual bed can be configured using main parts.
4). Therefore, the manufacturing cost of the bed can be reduced.

It is a front view of a manual bed whose bottom can be raised and lowered. It is a top view of a manual bed whose bottom can be raised and lowered. It is a bottom view of a manual bed whose bottom can be raised and lowered. It is a top view before the wiring of the electric bed of this invention. It is a front view before wiring of the electric bed of the present invention. It is a side view before wiring of the electric bed of the present invention. It is a bottom view before wiring of the electric bed of the present invention. It is a longitudinal cross-sectional view before the wiring of the electric bed of this invention. It is a principal part expanded bottom view after the wiring of the electric bed of this invention. It is a bottom view after wiring of the electric bed of the present invention. It is a bottom view after wiring of the electric bed of the present invention. In the electric bed of this invention, it is a systematic diagram which shows the structure of the electric system at the time of connecting a hand operating device to the connection part. In the electric bed of this invention, an example of the operation | movement pattern in the case of raising by carrying out interlocking control according to the sequence which preset the back bottom and the knee bottom is shown. FIG. 14 shows an initial state of the bottom when interlocking control is performed according to the operation pattern of FIG. 13. It shows the bottom state of the next phase. Furthermore, the bottom state of the next situation is shown. Furthermore, the bottom state of the next situation is shown. Furthermore, the bottom state of the next situation is shown. It shows the most raised state. In the electric bed of the present invention, an example of an operation pattern in the case of lowering the back bottom and the knee bottom by interlocking control according to a preset sequence is shown. It shows the state of the bottom of a certain aspect in descending. It shows the bottom state of the next phase in the descent. The bottom state of the further next phase in the descent is shown. The bottom state of the further next phase in the descent is shown. It shows the state of the bottom that has fallen most.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric bed 2 Caster 3 Carriage part 4 Lifting link 5 Bed frame 6 Bottom 6a Back bottom 6b Waist bottom 6c Knee bottom 6d Foot bottom 7 Lifting link 8a, 8b, 8c Electric actuator 9a, 9b, 9c Operation handle 10 Space part 11 Control box 12 Crank handle 13 Operation shaft 14 Power receiving side member 15 (15h, 15f) Wiring duct 16 Hand operating device connection portion 17 (17a, 17b) Electric wire 18 Battery

19 Graphical display unit 20 Numerical display unit 21 Power cords 22a, 22b, 22c Feed line M Mattress

Claims (2)

A bed frame, an elevating link, and a bed, comprising: a cart unit; a bed frame supported above and below the cart unit by an elevating link; and a bottom raised and lowered bed supported by the bed frame by an elevating link. Electric actuators are connected between the frame and the hoisting link, and the driving side end portions of these electric actuators are arranged with a space portion separated from the foot side end portions of the bed frame, and a controller for controlling the electric actuators is provided. The stored control box is placed on the bed frame corresponding to the space, the power receiving side member is placed on the head side of the bed frame, and the wiring duct is placed in the longitudinal direction on the bed frame to store and support the wires. Elevating and undulating electric bed characterized by the configuration The lifting and lowering type according to claim 1, wherein the wiring duct arranged in the longitudinal direction of the bed frame is divided in the length direction, and the divided wiring duct is shifted in the width direction of the bed frame. Electric bed

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