JP3862668B2 - Control method for interlocking raising / lowering of bottom in supine table such as bed - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention generally relates to a method for controlling ascending / descending in a supine table such as a bed (hospital bed, ICU bed, home bed, etc.) or a stretcher, and more particularly, a back part of a person who is supine. In a supine table equipped with a back bottom for raising and lowering and a knee bottom for raising and lowering a knee part of a person who is supine, the purpose of the back bottom and the knee bottom is achieved as follows: Therefore, the present invention relates to an interlocking raising / lowering control method for raising and lowering in conjunction with each other.
[0002]
[Prior art]
  In the supine table such as a bed or stretcher, there are a back bottom for raising and lowering the back part of the person who is supine and a knee bottom for raising and lowering the knee part of the person who is supine. In some cases, each bottom is configured to be movable up and down by a lifting mechanism provided to each bottom.
[0003]
  As such a supine table, there are many such as JP-A-2001-37820 (Patent Document 1), US Pat. Nos. 5,469,591, 5,448,789, 5,388,290, and the like. There is an example.
  For example, the bed described in Patent Document 1 is a back bottom for raising and lowering a back part of a person who is supine, a knee bottom for raising and lowering a knee part of a person who is supine, It has other bottoms,SaidWith the back bottomSaidBelow the knee bottom, an elevating arm provided with a roller at the tip is rotatably provided. The elevating arm is configured to be rotated by an electric drive mechanism such as a motor.
[0004]
[Patent Document 1]
  JP 2001-37280 A
[0005]
  In such a configuration, the lifting arm on the back bottom side is rotated and moved by the roller.SaidBy raising the back bottom by tilting and tilting it, the back of the person who is lying on the back can be lifted and the posture can be raised on the bed.
And like thisSaidWhen tilting the back bottom by ascending,SaidBy rotating the lifting arm on the knee bottom side with a rollerSaidBy raising and tilting the knee bottom,SaidIt is possible to effectively prevent the person who is supine from moving forward, which occurs when only the back bottom is raised.
[0006]
  That is, if you want to get up by lifting the back of a person who is lying on the bed,SaidIf only the bottom of the back is raised,SaidSince the back is pushed forward by the back bottom, the body gradually slides forward as it is, and the fulcrum where the body bends easily,SaidThe pivot point of the back bottom shifts. For this reason, the force to bend the part of the lumbar spine that is hard to turnSaidAddition from the back bottom causes uncomfortable feelings such as squeezing the lumbar part and the lower abdomen of a person who is supine.
[0007]
  ThereforeSaidWhen raising the back bottom,SaidRaise the knee bottom and try to push the supine person forwardSaidInclined force from the bottom of the backSaidIt can be supported by the body part located at the knee bottom, i.e. the thigh,SaidIt is possible to prevent the body slipping and discomfort that occurs when the back is lifted only by the back bottom.
[0008]
  in this waySaidAs the back bottom rises,SaidAs a conventional method for performing the operation of raising the knee bottom, for example, there is the following method.
  a. First of all,SaidWith the back bottomSaidEach drive mechanism that raises and lowers the knee bottom can be operated independently, so that the person who is lying or the nurse is using a remote control switch, etc.SaidEach drive mechanism is turned on and off simultaneously or alternately,SaidWith the back bottomSaidThis is a method of bringing each of the knee bottoms to a desired raised position.
  b. The second isSaidWith the back bottomSaidBy configuring the knee bottom drive mechanism to be driven by a common motor using a mechanical interlocking mechanism such as a link mechanism,SaidWith the back bottomSaidOperate the knee bottom drive mechanism mechanicallySaidWith the back bottomSaidThis is a method of bringing the knee bottom to a predetermined raised position.
[0009]
[Problems to be solved by the invention]
  However, these conventional methods have the following problems.
  A. First, in the method a, a person who is lying on the back or a nurse has to operate the back bottom and knee bottom drive mechanisms simultaneously or alternately, and the operation is very complicated and troublesome. As well as necessarySaidWith the back bottomSaidIt is difficult to always reproduce the best lifting form for each of the knee bottoms.
  B. In the method b, since a mechanical interlocking mechanism is used, the lifting form by interlocking the back bottom and the knee bottom must be simple and cannot be adjusted or changed. It is difficult to efficiently prevent both of such discomfort. Further, the back bottom and the knee bottom cannot be moved up and down independently.
  C. In any of the above methods a and b, when raising the back bottom, if the knee bottom is raised, the waist portion of the person who is supine isSaidIn a state supported by the knee bottomSaidBecause the back rises from the back bottom, the back of the person who is supine,SaidAlthough it tries to slide up against the back bottom and the mattress, there is friction, so this frictional force applies an external force in the sliding direction facing down to the back, andSaidWith the rise of the back bottomSaidWhen the knee bottom rises as it is,SaidWith the back bottomSaidThe angle formed by the knee bottom is gradually narrowed, and the lower abdomen of the person who is lying on the back is gradually bent by them, and at the end, a feeling of pressure is felt.
[0010]
[Means for Solving the Problems]
  The present invention was devised in view of the above points, that is, a back bottom for raising and lowering a back part of a person who is supine, and a knee part of a person who is supine. From the flat state where all the bottoms are lowered in the supine platform such as a bed that can be raised and lowered by the lifting mechanism provided for each,SaidWhen the back bottom is raised by rotation to be in an inclined state, both the body slipping and the uncomfortable feeling such as the pressure can be efficiently prevented.
[0011]
  First, in the first aspect of the present invention described in claim 1, a back bottom for raising and lowering a back part of a person who is supine and a part for raising and lowering a knee part of a person who is supine Knee bottoms are provided, and each bottom is a supine table such as a bed that can be raised and lowered by a lifting mechanism provided for each.SaidOn the back bottom side,SaidWhen the knee bottom is raisedSaidBy installing external force detection means to detect the external force in the sliding direction applied to the back of the person who is lying on the back by raising the back bottom, from the flat state where all the bottoms are descendingSaidWhen making the back bottom rise and tilt,SaidKnee bottomAppropriately before or after the back bottom or simultaneouslyAt this time,SaidThe knee bottom is detected by the external force detection means, and the external force in the sliding direction applied to the back of the person who is lying isProposes a method for controlling the vertical movement of the bottom of a supine stand such as a bed, which is controlled so that it is lowered when it rises to a set value of external force according to the person who is supine that is changed in advance To do.
[0012]
  AlsoClaim 3In the second embodiment of the present invention described in the above, a back bottom for raising and lowering a back part of a person who is supine and a knee bottom for raising and lowering a knee part of a person who is supine are provided. Each bottom has a supine stand such as a bed that can be raised and lowered by an elevating mechanism provided for each.SaidOn the back bottom side,SaidWhen the knee bottom is raisedSaidPosition detection means to detect the position shift of the person who is lying on the back caused by the rise of the back bottom, from the flat state where all the bottom is loweredSaidWhen making the back bottom rise and tilt,SaidKnee bottomAppropriately before or after the back bottom or simultaneouslyAt this time,SaidThe knee bottom is detected by the above-mentioned positional deviation detecting means, and the positional deviation on the upper body side of the person who is supine isA method for controlling the interlocking movement of the bottom of a supine stand such as a bed, which is controlled so as to descend when reaching a set value of a positional deviation corresponding to a person who is supine that is changed in advance. suggest.
[0013]
  In such a method, when the back bottom is raised by turning from the flat state where all the bottoms are lowered, the knee bottom is also raised. The position of the waist of the person who isSaidSupported by knee bottom. So in this stateSaidEven if the back bottom rises and gradually becomes steep, it is possible to prevent a person who is supine from falling down.
[0014]
  in this waySaidAs the back bottom rises,SaidWhen you raise the knee bottom, the waist part of the person who is supineSaidIn a state supported by the knee bottomSaidBecause the back rises from the back bottom, the back of the person who is supine,SaidAlthough it tries to slide up against the back bottom and the mattress, since there is friction, this frictional force applies an external force in a sliding direction facing downward, that is, an external force that presses the back downward. AndSaidWith the rise of the back bottomSaidAssuming that the knee bottom rises as it is,SaidWith the back bottomSaidThe angle formed by the knee bottom is gradually narrowed, and the lower abdomen of the person who is lying on the back is gradually bent by them, and at the end, a feeling of pressure is felt.
[0015]
  However, in the first embodiment of the present invention, the knee bottom is detected by the sliding direction external force detecting means, and the external force in the sliding direction applied to the back of the person who is supine,Allowance of external force according to the person who is supine that is changed in advanceWhen it rises to the set value, it controls so that it falls.SaidThe rise of the knee bottom does not progress all the time, soSaidWith the back bottomSaidThe angle formed by the knee bottom is never narrower than a certain angle.
[0016]
  Further, in the second aspect of the present invention, a position shift on the upper body side of a person who is supine caused by the external force in the sliding direction is detected by the position shift detection means, and the value isTolerance of misalignment according to the person who is supine that is changed in advanceWhen reaching the set value, control to lower the knee bottom,SaidThe rise of the knee bottom does not progress all the time, soSaidWith the back bottomSaidThe angle formed by the knee bottom is never narrower than a certain angle.
[0017]
  Therefore, in any of the above forms, it is possible to prevent the lower abdomen of a person who is supine from being bent gradually by the back bottom and the knee bottom and feeling a sense of pressure.
[0018]
  The external force detection means in the sliding direction for performing the above-described operation in the first embodiment includes a plate corresponding to the back of a person who is supine as proposed in claim 2, and the plate in the plane direction. A base that is movably supported;SaidPlate andSaidIt can be composed of a strain gauge installed between the substrates.
[0019]
  In addition, the positional deviation detection means for performing the above-described operation in the second embodiment is, for example, according to claim 4, in which the imaging means for imaging the head side of a person who is lying on the back side is installed on the back bottom side The position of the head of a person who is supine,SaidIt is proposed to detect the head image by the imaging means.
[0020]
  In addition, as proposed in claim 5, the misregistration detection means includes a plurality of light beam type object detection units composed of a light emitting unit and a light receiving unit, and the head side of the person whose light beam is supine. Or a distance measuring sensor that detects the change by measuring the distance to the top of the person who is supine as proposed in claim 6 It can be set as the structure installed in the side.
[0021]
  Next, in the methods proposed in claims 1 and 3, the set values of the external force in the sliding direction and the displacement are set corresponding to the person who is lying on the bed when performing the above control operations. Corresponding to the individual difference in which a person who is supine on the bed feels pressure, the knee bottom can be controlled to rise and fall according to each individual.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  Next, embodiments of the present invention will be described with reference to the drawings.
  First, as described above, FIG. 1 is an overall side view showing an example of a bed to which the bottom interlocking raising / lowering control method according to the present invention is applied, and the bed shown in the figure shows a portion of the back of a person who is supine. There are provided a back bottom 1a for raising and lowering, a knee bottom 1b for raising and lowering a knee part of a person who is lying, and a foot bottom 1c corresponding to a leg part of the person who is lying. The back bottom 1a, the knee bottom 1b, and the foot bottom 1c are connected to each other so as to be bendable and are configured as bottoms corresponding to the whole body, and are supported by the bed frame 2. AlsoSaidBack bottom 1a,SaidWith knee bottom 1bSaidA mattress 3 is provided on each of the foot bottoms 1c. Here, a support mechanism for supporting the bottom divided into a plurality of parts on the bed frame 2 and moving up and down is well known, and is not shown.
[0023]
  In the bed of this embodiment, the bottom corresponding to the whole body is configured by connecting the three divided bottoms 1a, 1b, and 1c. However, the number of divisions may be four, and A large number of members are connected so as to be bendable, as described in Japanese Unexamined Patent Publication No. 2001-37280, US Pat. Nos. 5,469,591, 5,448,789, 5,388,290, and the like. Things may be applied as the bottom. In any case, in the bed to which the present invention is applied, a back bottom for raising and lowering the back part of the person who is supine and a knee bottom for raising and lowering the knee part of the person who is supine are provided. It only has to be prepared.
[0024]
  Also,SaidWith the back bottom 1aSaidAn elevating mechanism for elevating the knee bottom 1b is also described in JP-A-2001-37280, US Pat. Nos. 5,469,591, 5,448,789, 5,388,290, and the like. In other words, the lifting arm with a roller at the tip is rotated by an electric drive mechanism such as a motor so that each bottom can be lifted and supported by the roller. A configuration in which a linear motion member of a rotation-linear motion conversion mechanism composed of a screw shaft and a female screw screwed to the arm is connected to the arm attached to is suitable.
[0025]
  And the raising / lowering mechanism for raising / lowering these back bottom 1a and knee bottom 1b is controlled to operate | move interlock | cooperating so that it may mention later, In addition to such a control mode, as needed Thus, it can be configured to have a control mode in which each bottom is operated independently.
[0026]
  That is, an example of a bed control mechanism to which the bottom interlocking raising / lowering control method according to the present invention is applied will be described with reference to FIGS. 1 and 2. Reference numeral 4 denotes a bed footboard. An operation panel 5 is configured, and the operation switches and the like shown in FIG.
[0027]
  In the operation panel 5, there are provided the raising and lowering switches SW1 and SW1 of the back bottom 1a and the raising and lowering switches SW3 and SW4 of the knee bottom 1b.SaidBack bottom1aWhenSaidKnee bottom1bCan be controlled independently.
[0028]
  The operation panel 5 also hasAscending and descending switches SW1 and SW1 of the back bottom 1a and ascending and descending switches SW3 and SW4 of the knee bottom 1bIn addition, switches for raising and lowering the back bottom 1a and knee bottom 1b in conjunction with each other, that is, raising and lowering switches SW5 and SW6 are provided.
[0029]
  on the other hand,SaidOn the back bottom 1a side, in this case, the mattress 3 is provided with an external force detecting means 8 in the sliding direction for detecting an external force in the sliding direction applied to the back of the person who is lying on the back. As schematically shown in FIG. 1, the external force detecting means 7 in the sliding direction includes a plate 9 corresponding to the back of a person who is lying on the back, and a base body that supports the plate 9 so as to be movable in a plane direction. 10 andSaidWith plate 9SaidIt consists of a strain gauge 11 installed between the substrates 10. In addition to such a configuration, the external force detection means 7 in the sliding direction is appropriately configured, for example, using a pressure-sensitive sensor as long as the external force in the sliding direction applied to the back of a person who is lying on the back is detected. can do.
[0030]
  Reference numeral 6 denotes a controller 6.SaidWith the back bottom 1aSaidThe motors M1 and M2 that move the knee bottom 1b up and down are controlled to be turned on and off, and the controller 6 is configured to receive the output signal of the external force detecting means 7 in the sliding direction.
[0031]
  On the other hand, in the operation panel 5, the controller 6 determines whether or not the value of the external force in the sliding direction input from the external force detecting means 7 in the sliding direction is a set value. An external force setting unit Sf is provided.
[0032]
  In the above configuration, the control operation of the present invention isWhen the back bottom and knee bottom are interlockedWill be described.
  First, FIG. 3 shows a state in which all the bottoms 1a, 1b, and 1c are lowered and are supported flatly. In this state, a person such as a patient lies in a normal posture. In this state, in order to raise the back of a person who is supine and get up, the switch SW5 is turned on and a command is issued to the controller 6.
[0033]
  Upon receiving this command, the controller 6 first starts the raising of only the knee bottom 1b by operating the lifting mechanism of the knee bottom 1b as shown in FIGS. The start point of the rise of the knee bottom 1b is a time point t = 0 in FIG.
[0034]
  Next, the controller 6 receives the command and at a time (t = T1) appropriately delayed from the time when the knee bottom 1b starts to rise.SaidThe back bottom 1a starts to rise, and thereafter, as shown in FIG.SaidWith the back bottom 1aSaidBoth knee bottoms 1b rise.
[0035]
  As described above, when the back bottom 1a is raised by the rotation from the flat state where all the bottoms are lowered, the knee bottom 1b is first lifted, so that the knee bottom 1b is lifted. Because of the position of the waist of the person who is supineSaidSupported by the knee bottom 1b, so in this stateSaidBack bottom1aEven if the person starts to ascend and gradually becomes a steep slope, a person who is lying on the back is prevented from being pushed forward and sliding down.
[0036]
  still,SaidIn addition to the above, the rise start of the knee bottom 1b is as described above.SaidIt can be at the same time as or after the rise of the back bottom 1a.
[0037]
  As described above, when the knee bottom 1b rises when the back bottom 1a is raised, the waist portion of the person who is supine isSaidIn a state supported by the knee bottom 1bSaidSince the back is raised by the dorsal bottom 1a, the back of the person who is supine isSaidAlthough it tries to slide up against the mattress 3 placed on the back bottom 1a, there is friction, and this frictional force causes the external force in the sliding direction facing downward, that is, the back or the like is pressed downward. Such external force is applied. AndSaidAscending the back bottom 1aSaidIf the rise of the knee bottom 1b continues from the state of FIG.SaidWith the back bottom 1aSaidSince the angle formed by the knee bottom 1b is gradually narrowed, the lower abdomen of a person who is supine is gradually bent by them, and at the end, a feeling of pressure is felt.
[0038]
  However, in the present invention, the controller 6 always monitors the external force signal in the sliding direction from the external force detecting means 7 in the sliding direction indicated by the broken line in FIG. 9, and the external force in the sliding direction is set as the external force in the sliding direction. When the pressure set by the means Sf is reached, the controller 6 controls the back bottom 1a to continue to rise, but changes the operation of the raising / lowering mechanism of the knee bottom 1b to control it to descend.
[0039]
  ThusSaidBy lowering the knee bottom 1b,SaidEven if the back bottom 1a rises further and becomes a steep angle,SaidSince the angle of the knee bottom 1b gradually decreases,SaidWith the back bottom 1aSaidThe angle formed by the knee bottom 1b is not narrow, so the external force in the sliding direction is not increased, and the lower abdomen of the person who is lying on the backSaidWith the back bottom 1aSaidIt can be prevented that the knee bottom 1b is gradually bent and a feeling of pressure is felt.
[0040]
  If the configuration value of the external force in the sliding direction can be changed when performing the above control operation, it corresponds to each individual corresponding to the individual difference that feels the pressure of the person who is lying on the bed It is possible to control the raising and lowering of the knee bottom.
[0041]
  Next, in order for the controller 6 to perform the control operation as described above in the raising operation of the knee bottom 1b and the back bottom 1a,SaidDelayed from the rise start time (t = 0) of the knee bottom 1b,SaidAs a method for detecting the time point when the back bottom 1a starts to rise (t = T1) and / or the time point when the knee bottom 1b reaches the highest raised position (t = T2), the first method is as follows. ,SaidIt can be detected and determined by the elapsed time from the time when the knee bottom 1b starts to rise.
[0042]
  The ability of the drive source such as an electric motor for operating the raising / lowering mechanism of the back bottom 1a and the knee bottom 1b is more than the force necessary for raising the back bottom 1a and the knee bottom 1b to which the external force of the person who is lying is applied. If the force is sufficiently large or the external force is constant, there is a one-to-one correspondence between the elapsed time from when the lifting mechanism is operated and the positions of the raised bottoms 1a and 1b. Control operations as described above corresponding to the raised positions of the bottoms 1a and 1b can be performed using an easy elapsed time.
[0043]
  In this case, by making it possible to change the set times of T1 and T2 in the controller 6, an appropriate control operation can be performed according to various conditions such as a person lying on the bottom. .
[0044]
  next,SaidIn order for the controller 6 to perform the control operation as described above,SaidDelayed from the rise start time (t = 0) of the knee bottom 1b,SaidWhen the back bottom la starts to rise (t = T1) and / orSaidAs a second method for detecting the time (t = T2) when the knee bottom 1b reaches the highest ascending position,SaidIt is possible to apply a method of providing position detection means such as an angle sensor on the knee bottom 1b and detecting the position by this position detection means. AndSaidThe position detection means of the knee bottom 1b can be provided at an appropriate place such as the knee bottom itself, an elevating mechanism or an electric motor as a drive source.
[0045]
  Also in this case, by making each of the above positions settable, an appropriate control operation can be performed according to various conditions such as a person who is supine on the bottom.
[0046]
  In addition, the above is the control operation of the back bottom 1a and the knee bottom 1b to which the present invention is applied.SaidBack bottom1aIs described as an operation in the case of tilting by raising by turning,SaidBack bottom1aSince the operation in the case where all the bottoms are lowered and flattened from the most inclined state due to the rotation by the rotation, the process follows exactly the reverse of the case where the bottoms are raised, this description is omitted.
[0047]
  Even during this downward movement,SaidKnee bottom1bSince the action of rising to a certain position or rising to the highest position and then descending is performed, even when descendingSaidKnee bottom1bThis action prevents the person who is lying on the bottom from shifting, and the caregiver is able to control the person who is lying when the entire bottom is flat. It is possible to save the trouble of returning the supine position to the original position.
[0048]
  In the present invention, depending on the case, the back bottom 1a and the knee bottom 1b are in a state where all the bottoms are lowered and are flat,SaidBack bottom1aIt is also possible to move down to a flat state by an interlocking operation different from the operation in the case of raising by turning and making it inclined. For example,SaidBack bottom1aWhen loweringSaidBack bottom1aPrior to the descent ofSaidKnee bottom1bCan be raised.
[0049]
  In the first embodiment of the present invention described above, the waist portion of the person who is supine is the knee bottom.1bWhen the back is raised by the back bottom 1a while being supported by the external force, an external force applied to the back of the person who is lying on the back, that is, an external force that presses the back downward is applied.SaidDetected by the external force detection means 8 installed on the mattress 3 on the back bottom 1a side,SaidAlthough the rise of the knee bottom 1b is suppressed, in the embodiment described below, a person who is supine is caused by the external force.SaidDetect misalignment caused to the back bottom 1a sideSaidThe knee bottom 1b is controlled.
[0050]
  Specifically, FIG. 10 is a side view showing the whole of another example of the bed to which the bottom interlocking raising / lowering control method according to the present invention is applied, and FIG. 11 shows the back bottom and knee bottom raised in the bed of FIG. It is a side view which shows a state. Since the general structure of the bed shown in these figures is the same as that shown in FIG. 1, the corresponding components are given the same reference numerals and redundant description is omitted.
[0051]
  In the beds shown in FIGS. 10 and 11, a displacement detection means 7 is provided instead of the external force detection means 8. The positional deviation detection means 7 includes a plurality of light beam type object detection units 7a each including a light emitting unit and a light receiving unit (only one side is shown for the side view, but the other side is formed on the back side of the drawing). , 7b, 7c, 7d,..., 7b, 7c, 7d,..., 7b, 7c, 7d,... Installed on the side rail 12 installed on the back bottom 1a side, in this case on the back bottom 1a. It is.
[0052]
  In this configuration, among the plurality of light beam type object detection units 7a, 7b, 7c, 7d,..., The light beam can be detected by the signals from the light receiving units. It is possible to detect the position of the head side of the person who is doing. And by detecting this position every moment, it is possible to detect a positional deviation on the head side of a person who is lying on his / her back.
[0053]
  Thus, in this embodiment, when the position deviation detection means 7 detects a position deviation on the upper body side of a person who is lying on the back due to the external force in the sliding direction, and the value reaches a set value. Is controlled so that the knee bottom 1b is lowered.SaidThe rise of the knee bottom 1b does not progress all the time, so the back bottom 1aSaidThe angle formed by the knee bottom 1b is never narrower than a certain angle.
[0054]
  Next, FIG. 12 is a plan view showing the whole of still another example of the bed to which the bottom interlocking raising / lowering control method according to the present invention is applied. In FIG. is doing.
[0055]
  That is, reference numeral 13 denotes an image pickup means for picking up the head side of a person who is supine from the side, for example, a CCD camera. The CCD camera 13 is installed on the side rail 12 installed on the back bottom 1a, and is positioned. A deviation detecting means 7 is configured.
[0056]
  This CCD camera 13 is connected to image processing means (not shown), and processes the image of the head side of a person who is lying on his / her side captured from the side. That is, the image processing means can detect the positional deviation on the head side by comparing the image on the head side at a certain time point with the image on the head side at the previous time point. Since the method of detecting misregistration based on such an image is well known, detailed description thereof is omitted.
[0057]
  Reference numeral 14 denotes a distance measuring sensor using an ultrasonic beam or the like. The distance measuring sensor 14 is placed on the top of the head of the person who is supine, in this case, above the back bottom 1a on the headboard 15 side. The misalignment detecting means 7 is installed.
[0058]
  The positional deviation detection means 7 using the distance measuring sensor 14 can detect the positional deviation of a person who is lying on the back due to a change in distance.
[0059]
  Thus, also in these misregistration detection means 7, the misregistration detection means 7 detects the misregistration on the upper body side of the person who is supine due to the external force in the sliding direction, and the value reaches the set value. When it reaches, it controls to lower the knee bottom 1b.SaidThe rise of the knee bottom 1b does not progress all the time, so the back bottom 1aSaidThe angle formed by the knee bottom 1b is never narrower than a certain angle.
[0060]
【The invention's effect】
  As described above, the present invention includes a back bottom for raising and lowering a back part of a person who is supine and a knee bottom for raising and lowering a knee part of a person who is supine, The bottom is a sloping base such as a bed or stretcher that can be moved up and down by a lifting mechanism provided on each, and the back bottom is tilted upward from the flat state where all the bottoms are lowered. When setting the state,SaidSince the knee bottom is also raised appropriately, from the flat state where all the bottoms are lowered,SaidWhen the back bottom is raised by turning,SaidTo raise the knee bottom,SaidThe position of the waist of a person who is supine by raising the knee bottomSaidSupported by knee bottom. So in this stateSaidEven if the back bottom rises and gradually becomes steep, it is possible to prevent a person who is supine from falling down.
[0061]
  In this way, when raising the back bottom, if the knee bottom is raised, the waist part of the person who is supine isSaidIn a state supported by the knee bottomSaidBecause the back rises from the back bottom, the back of the person who is supine,SaidAlthough it tries to slide up against the back bottom and the mattress, since there is friction, this frictional force applies an external force in a sliding direction facing downward, that is, an external force that presses the back downward. AndSaidWith the rise of the back bottomSaidAssuming that the knee bottom rises as it is,SaidWith the back bottomSaidThe angle formed by the knee bottom is gradually narrowed, and the lower abdomen of the person who is lying on the back is gradually bent by them, and at the end, a feeling of pressure is felt.
[0062]
  However, in the present invention, the external force in the sliding direction is detected by the external force detecting means, or the positional deviation of the person who is lying due to the external force is detected by the positional deviation detecting means, When it rises, it controls to lower the knee bottom,SaidThe rise of the knee bottom does not progress all the time, soSaidThe angle formed by the knee bottom is never narrower than a certain angle.
  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.
[Brief description of the drawings]
FIG. 1 is an overall side view showing an example of a bed to which a bottom interlocking raising / lowering control method according to the present invention is applied.
FIG. 2 is an explanatory diagram showing an example of a bed control mechanism to which the bottom interlocking movement control method according to the present invention is applied.
FIG. 3 is a side view showing the overall shape of the bottom when the bottom interlocking raising / lowering control method according to the present invention is applied to a bed, and shows a state where all the bottoms are lowered and are flat.
FIG. 4 is a side view showing the overall shape of the bottom of another aspect in the lifting operation when the bottom interlocking lifting control method according to the present invention is applied to a bed.
FIG. 5 is a side view showing the overall shape of the bottom of yet another aspect of the lifting operation when the bottom interlocking lifting control method according to the present invention is applied to a bed.
FIG. 6 is a side view showing the overall shape of the bottom of still another aspect in the lifting operation when the bottom interlocking lifting control method according to the present invention is applied to a bed.
FIG. 7 is a side view showing the overall shape of the bottom of still another aspect in the lifting operation when the bottom interlocking lifting control method according to the present invention is applied to a bed.
FIG. 8 is a side view showing the overall shape of the bottom of still another aspect in the lifting operation when the bottom interlocking lifting control method according to the present invention is applied to a bed.
FIG. 9 is an explanatory diagram showing an example of changes in the inclination angles of the back bottom and the knee bottom over time when the bottom continuous control method according to the present invention is applied;
FIG. 10 is an overall side view showing another example of a bed to which the bottom interlocking movement control method according to the present invention is applied.
11 is a side view of the main part showing a state in which the back bottom and the knee bottom are raised in the bed of FIG. 10;
FIG. 12 is an overall plan view showing still another two examples of a bed to which the bottom interlocking lifting control method according to the present invention is applied.
[Explanation of symbols]
1a Back bottom
1b Knee bottom
1c foot bottom
2 Bed frame
3 Mattress
4 Footboard
5 Operation panel
6 Controller
7 Misalignment detection means
7a, 7b, 7c, 7d Light beam type object detector
8 External force detection means
9 plates
10 Substrate
11 Strain gauge
12 Side rail
13 Imaging means (CCD camera)
14 Ranging sensor
M1, M2 electric motor
SW1 to SW6 switch
Sf External force setting part

Claims (6)

It has a back bottom for raising and lowering the back part of the person who is supine and a knee bottom for raising and lowering the knee part of the person who is supine, and each bottom is provided for each in supine board such beds are vertically movable structure by the lifting mechanism, the back to the bottom side, the increase of the back bottom at elevated state of the knee bottom, sliding direction acting on the back of the person supine established the external force detecting means for detecting the external force, when the said back bottom from a flat state where all the bottom are lowered and tilted state of being raised by the rotation, the knee bottom is also the back bottom after appropriate or time later to, or together with assumed to increase at the same time, this time, the knee bottom is where the detection by the external force detecting means, the external force in the sliding direction acting on the back of the person supine is , the pre When increased to the set value of the external force corresponding to a person the supine to be changed, the bottom of interlocking elevator control method in supine stand bed etc. and controls so as to descend The external force detecting means, a plate corresponding to the back of the person supine, that the base for movably supporting the plate in a plane direction, was constructed from the strain gauges installed between the plate and the substrate A method for controlling the ascending / descending of the bottom of a supine table such as a bed according to claim 1. It has a back bottom for raising and lowering the back part of the person who is supine and a knee bottom for raising and lowering the knee part of the person who is supine, and each bottom is provided for each in supine board such beds are vertically movable structure by the lifting mechanism, the back to the bottom side is caused by the increase of the back bottom at elevated state of the knee bottom, detects the positional deviation of the person supine position deviation detecting means installed, when the said back bottom from a flat state where all the bottom are lowered and tilted state of being raised by the rotation, the knee bottom as appropriate time later with respect to the back bottom to or after, or together at the same time assumed to increase, the this case, the knee bottom is where the detection by the position deviation detecting means, the positional deviation of the upper body side of the person supine, is changed in advance Back The in upon reaching to the set value of the displacement in response to a person is, the bottom of interlocking elevator control method in supine stand bed etc. and controls so as to descend The positional shift detecting means installed with imaging means for imaging the head of the person supine from the lateral side to the back bottom side, the positional deviation of the human head, which has a supine captured, the 4. The method for controlling the interlocking raising / lowering of the bottom of a supine table such as a bed according to claim 3, wherein detection is performed based on a deviation of a head image by an imaging means. The positional deviation detection means, installing a plurality of light-beam object detector comprising a light emitting portion and a light receiving portion, their light beams, the back bottom side across the head side of the person supine 4. A method for controlling the interlocking movement of the bottom of a supine table such as a bed according to claim 3, The positional deviation detection means, claims to measure the distance to the top of the head of the person supine, characterized in that the installed configuration of the distance measuring sensor which detects the change in the back bottom side The interlocking raising / lowering control method of the bottom in the supine stand of the bed etc. of 3

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