JP4486809B2 - Bed equipment - Google Patents

Description

  The present invention relates to a bed apparatus including a floor plate body driven by a drive mechanism.

  In general, a bed apparatus has a bed body, and the bed body is provided with a floor plate. A mattress is placed on the upper surface of the floor plate body, and a user lies on the mattress.

  In a bed apparatus used in a hospital or the like, the bed main body is composed of a base frame and a bed frame provided on the base frame so as to be vertically driven by a vertical drive mechanism. I have to. Then, the floor plate body is divided into a plurality of floor portions and is rotatably connected, and at least the floor portion corresponding to the upper half of the user can be driven up and down by a back-up drive mechanism. There is.

  By the way, such a bed apparatus may have, for example, a bag or may be used by an amnestic user. In such a case, in order to ensure the safety of the user, the user uses a mattress. It may be necessary to be able to determine whether or not he is on the floor, i.e. whether he is landing or getting out of bed.

  Technical Document 1 discloses a floor separation detector that detects whether or not a user has left the floor. This floor separation detector has a plurality of pressure-sensitive switches that operate by detecting the pressure of the human body, and when all the pressure-sensitive switches do not detect pressure, a signal is output when the user leaves the floor. It has become.

  In Patent Document 2, it is possible to detect where the user is, and when the user reaches a dangerous position where the user is likely to fall from the bed, an alarm is sounded or a guard is attached to the side of the bed. It has been shown.

In Patent Document 3, it is possible to determine whether or not there is a user on the bed by an infrared sensor attached to the headboard.
Japanese Utility Model Publication No. 1-155406 Japanese Patent No. 2830661 Japanese Patent No. 3389376

  According to the invention disclosed in Patent Document 1, it is possible to detect whether a user is landing or leaving the floor. However, in the hospital bed apparatus described above, when the user who has left the floor returns, before the user rests on the mattress, the user operates the remote controller to activate the vertical drive mechanism and the back-up drive mechanism. The bed frame may be raised or the floor may be raised. In that case, the user may not be able to climb or rest on the bent mattress.

  According to the invention described in Patent Document 2, although it is possible to detect where the user is and to report or warn the user, in the hospital bed apparatus, for example, the floor is raised. Even when the back is raised, the arm of the user who is supine on the bed may be caught between the rising floor and the side frame provided on the side of the bed frame or the bed frame. The rise of the floor is continued without detecting that. As a result, the user may be injured in the arm.

  According to the invention disclosed in Patent Document 3, although it is possible to determine whether there is a user on the bed by an infrared sensor attached to the headboard, the user may get up on the bed, and in that state There are cases where a back-up drive mechanism or a vertical drive mechanism is operated. In that case, there is a possibility that the posture of the user becomes unstable or falls on the bed.

  It is an object of the present invention to provide a bed apparatus that detects whether or not there is a user on a mattress, and that cannot drive a drive mechanism if it is not.

  The present invention relates to a bed apparatus in which the driving of the floor portion is switched from the rising drive to the lowering drive when an object is caught between the floor portion and the bed main body while the floor portion is being driven to rise. Is to provide.

  It is an object of the present invention to provide a bed apparatus that can detect that a user has stood up on a mattress and cannot drive a drive mechanism if the user has detected it.

This invention is a bed apparatus provided with a mattress on which a user lies,
The bed body,
A floor plate body which has a plurality of floor portions and is provided on the bed body and on which the mattress is placed;
A drive mechanism that drives at least one of the up-and-down drive of the floor plate body or the undulation drive of the floor portion corresponding to the upper body of the user among the plurality of floor portions of the floor plate body;
A landing / leaving detection sensor provided on the mattress for detecting whether the user is on the mattress;
A load detection sensor that is provided at both ends of the mattress in the width direction and detects that when a load of a predetermined level or more is applied to the mattress when the floor portion is driven in the raising direction;
A rising detection sensor provided on the bed body for detecting that the user has risen on the mattress;
When the landing / leaving detection sensor detects that the user is no longer on the mattress, the detection signal causes the floor to be raised by the drive mechanism before the user is placed on the mattress. disables the drive to, when the user load on the end of the mattress join the load above the load sensor detects when you are on the mattress, raising direction of the floor portion by the drive mechanism by the detection signal When the rising detection sensor detects that the user has risen in the floor plate body, the operation command signal for controlling the driving mechanism is turned off by the detection signal. And a control device for disabling the driving of the floor board.

  According to the present invention, it is detected whether or not there is a user on the mattress, and if it is not, the drive mechanism cannot be driven. Therefore, the user who has left the floor operates the drive mechanism before landing. It can be prevented that it becomes difficult to return to the mattress.

  According to the present invention, when a user's arm or the like is sandwiched between the floor and the bed main body while the floor is being driven in the raising direction, the floor is driven in the raising direction. Therefore, the user can be prevented from being injured in the arm.

  According to the present invention, when it is detected that the user has risen on the mattress, the drive mechanism cannot be driven. The person's posture can be prevented from becoming unstable or falling down.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a bed apparatus used in a hospital or the like, and this bed apparatus includes a bed body 1. This bed main body 1 has a rectangular frame-shaped base frame 3 provided with leg members 2 at four corners. The base frame 3 is provided with a bed frame 4 formed in a rectangular frame shape larger than the base frame 3 so as to be vertically movable by a link 5 so that the bed frame 4 is vertically driven by a vertical drive mechanism 6 constituting a drive mechanism. It has become. That is, when the vertical drive mechanism 6 operates, the link 5 rotates in the direction indicated by the arrow in FIG. 1, and the bed frame 4 is raised.

  A head board 7 is provided at one end of the bed frame 4 in the longitudinal direction, and a foot board 8 is provided at the other end. As shown in FIGS. 1 and 2, side rails 9 are detachably provided on the bed frame 4 on both sides in the width direction of the end portion on the headboard 7 side.

  The bed frame 4 is provided with a floor plate 11. The floor plate body 11 is divided into a plurality of floor portions, in this embodiment, five floor portions 12a to 12e. The fixed floor portion 12 a located at the center in the longitudinal direction is fixed to the bed frame 4. A waist floor portion 12b and a back-up floor portion 12c are connected to one side of the fixed floor portion 12a so as to be sequentially rotatable. A first leg floor portion 12d and a second leg floor portion 12e are connected to the other side of the fixed floor portion 12a so as to be sequentially rotatable.

  A back-up drive mechanism 14 constituting a drive mechanism is provided on the lower surface side of the floor plate body 11 of the bed frame 4. Although not shown, the back raising drive mechanism 14 has arms positioned on the lower surface side of the back raising floor portion 12c and the lower surface side of the first leg floor portion 12d. When the back raising drive mechanism 14 is activated, the arms are driven in the raising direction. As a result, among the floors lying down horizontally as shown by the chain line in FIG. 1, the waist floor 12b and the back-up floor 12c rise, and the first leg floor 12d and the second leg floor 12e rises in a substantially U shape.

  A mattress 15 is placed on the upper surface of the floor plate body 11. The mattress 15 has a structure having a softness that bends as the floor portions of the floor plate 11 are driven and raised.

  As shown in FIG. 2, a landing / leaving detection sensor 21 having a length from the headboard 7 side to the midway in the longitudinal direction is provided inside the center portion in the width direction of the mattress 15. The landing / leaving detection sensor 21 is formed of a piezoelectric element formed in a cord shape, and the cord is bent in a wave shape and provided in the mattress 15.

  Accordingly, whether the user is lying on the mattress 15, that is, whether the user is landing or getting out of bed, is determined by the movement of the user, body movement such as heartbeat vibration or breathing. The landing / leaving detection sensor 21 can detect.

  Tape-shaped load detection sensors 22 are provided along the longitudinal direction at both ends in the width direction of one end of the mattress 15 on the headboard 7 side. The load detection sensor 22 can detect that it is deformed when pressure is applied. Accordingly, when the back raising drive mechanism 14 is operated and the back raising floor portion 12c is driven in the raising direction, the user's arm or the like who is supine on the mattress 15 is sandwiched between the side fences 9 and the like. When a relatively large load is applied to one end of the mattress 15 in the width direction, the load detection sensor 22 detects this.

  A support column 24 is erected on the outer surface of the headboard 7, and a rising detection sensor 25 such as an infrared sensor is provided on the support column 24 so that the height thereof can be adjusted. The rising detection sensor 25 detects the user when the user on the mattress 15 rises from the supine state.

  An illuminator 26 that illuminates the upper surface of the mattress 15 is provided at the upper end of the column 24. The illuminator 26 is turned on at a timing described later.

  As indicated by a chain line in FIG. 2, a control device 27 is provided on the lower surface side of the bed frame 4. A control panel 28 is electrically connected to the control device 27. For example, as shown in FIG. 1, the control panel 28 is provided to be locked to the side fence 9.

  As shown in FIG. 3, the control panel 28 includes a first display operation unit 31 for each of the sensors 21, 22, and 25 constituting the danger prevention device, and a second display operation unit for the illuminator 26. 32 is provided. Further, a speaker 33 and a volume 34 are provided.

  The first display operation unit 31 is provided with a switch 31a for turning on and off, a bed leaving lamp 31b, a rising lamp 31c, and a sandwiching lamp 31d, and these lamps are turned on by the detection signals of the sensors 21, 22, 25. It has become. The second display / operation unit 32 is provided with a manual on / off switch 32a for the illuminator 26 and a turn-off timer 32b. The timer 32b can adjust the lighting time of the illuminator 26 between 1 and 10 minutes.

  Detection signals from the landing / leaving sensor 21, the load detection sensor 22, and the rising sensor 25 are input to the control device 27. A remote controller 36 is connected to the control device 27. The remote controller 36 is provided with a plurality of operation buttons 37. By operating the operation buttons 37, the vertical drive mechanism 6 is driven to move the bed frame 4 up and down, and the back drive mechanism 14 is operated. The floor portion of the floor plate 11 can be raised and lowered by driving.

  Further, a notification device 38 is connected to the control device 27. The notification device 38 is activated when a predetermined time, for example, 2 seconds or 5 seconds has elapsed since the detection of the absence of a user on the mattress 15 by the landing / leaving detection sensor 21 in the monitor mode described later. The nurse center telephone 39, the caregiver's fixed telephone 40a, the portable telephone 40b, and the like are notified of this.

  FIG. 4 is a flowchart of a control mode by the control device 27. When the power plug 27a (shown in FIG. 3) of the control device 27 is connected to the power source as indicated by S1, the CPU set buzzer built in the control device 27 sounds for 0.5 seconds as indicated by S2, and is indicated by S3. The monitor enters sleep mode.

  By turning on the switch 31a provided in the first display operation unit 31a of the control panel 27 as shown in S4, whether or not the landing / leaving detection sensor 21 is turned on as shown in S5, that is, the mattress 15 It is detected whether there is a user above.

  If the detection in S5 is YES, a buzzer (not shown) built in the control panel 27 sounds for 0.5 seconds in S6 and the monitor mode shown in S7 is set. If the determination in S5 is NO, in S8, a voice message “Please press the switch (31a) again with the user sleeping” flows from the speaker 33, and the process returns to the monitor sleep mode in S3.

  The monitor mode of S7 includes the return mode and the leaving mode based on the detection signal of the landing / leaving sensor 21, the sandwiching mode based on the detection signal of the load detection sensor 22, and the rising mode based on the detection signal of the rising detection sensor 25. There is.

  As shown in S9, when the detection of the user by the landing / bed-off sensor 21 is turned off and 0.5 seconds elapses, the bed leaving mode becomes the bed leaving mode shown in S10. As shown in S11, in the state of leaving the bed, the landing / leaving sensor 21 detects that the user has returned to the floor, and can select either 2 seconds or 5 seconds (in this embodiment, select 5 seconds ) When the time has elapsed, it is determined whether or not the notification device 38 is notified of the user's getting out of bed as shown in S12. If YES, the user returns to the monitor mode S7. If NO, return to monitor mode.

  As shown in S15-1 and S15-2, the pinching mode is the pinching mode shown in S16 when the load detection sensor 22 is turned on while the back-up operation is performed by the switch button of the remote controller 26. In the pinching mode S16, if the switch button of the remote controller 26 is being pressed as shown in S15-1 and S15-2 while the load detection sensor 22 is on, the back-down operation is reversed during that time, and the monitor shown in S3 It returns to the sleep mode or the monitor mode shown in S7. In other words, the monitor mode S7 returns to the monitor mode S16 from the monitor mode S7 state, and the monitor sleep mode S3 returns to the monitor mode S16 from the monitor pause mode S3 state.

  As shown in S17, when the user rises on the mattress 15 and the rise detection sensor 25 continues to detect this for 0.2 seconds or more, the rise mode shown in S18 is set. As shown in S19, when the rising detection sensor 25 is turned off and 2 seconds elapse, the rising mode is canceled and the monitor mode returns to S7.

  5 to 10 are diagrams for explaining the operation in each mode. FIG. 5 shows the monitor pause mode S3. In the monitor pause mode S3, only the operation of the switch 31a of the first display unit 31 is accepted, and the signals for controlling the operations of the vertical drive mechanism 6 and the back drive mechanism 14 are controlled. That is, the operation command signal is in an ON state.

  In the monitor mode S7 shown in FIG. 6, the operation command signal is in an ON state, and the illuminator 26 is in a state in which the lighting time can be set by the extinguishing timer 32c. In the return mode S <b> 13 shown in FIG. 8, a return notification is output from the notification device 38.

  The illuminator 26 is turned on in the bed leaving mode S10 shown in FIG. At this time, the illuminator 26 can be turned off by the timer 32 c or the switch 32 a provided in the second display operation unit 32 of the control panel 28. If the landing / leaving detection sensor 21 remains off for 5 seconds or longer (can be switched to 2 seconds or longer), the floor is notified and the operation command signal is off, and the switch button on the remote controller 36 is pressed. The buzzer will sound while you are.

  In the pinching mode S16 shown in FIG. 9, the back raising (raising) operation is automatically reversed to the back lowering (falling down) operation. This inversion operation is continued until the operation of the switch button 37 of the back raising operation of the remote controller 36 is stopped. During the back-lowering operation, the buzzer continues to sound at 4 Hz, for example, until the operation of the switch button 37 is stopped.

  In the startup mode S18 shown in FIG. 10, the illuminator 26 is turned on. At this time, the illuminator 26 can be turned off by the timer 32c or the switch 32a. Also, repeat the message “Dangerous, please do not stand on the bed” from the speaker 33 about 2 to 10 times.

  Further, in the start-up mode S18, the operation command signal is turned off, and the detection by the start-up detection sensor 25 has no recognition off-time (time for detecting no start-up) of 1 second or more and is detected for 2 seconds. Is notified to the telephones 39, 40a, and 40b via the notification device 38 that the user is up. If the switch button of the remote controller 36 is pressed while the rising detection sensor 25 detects that the user has risen, a buzzer is sounded at 4 Hz, for example. That is, the user is warned that the remote controller 36 is being operated while the user is up.

  According to the bed apparatus having such a configuration, when the switch 31a of the first display operation unit 31 of the control panel 28 is turned on while the user is on the mattress 15, the monitor mode S7 shown in FIG. The user's behavior on the mattress 15 will be monitored.

  When the user leaves the floor and the landing / bed-off detection sensor 21 detects this fact and 0.5 seconds have elapsed, the illuminator 26 is turned on to illuminate the bed apparatus. When 5 seconds have elapsed since the landing / leaving detection sensor 21 detects the user's getting out of bed, the informing device 38 issues a getting out notification. At this time, as shown in FIG. 7, since the operation command signal is OFF, the operation of the vertical drive mechanism 6 and the back drive mechanism 14 is disabled by the remote controller 36.

  Therefore, even if the user operates the remote controller 36 before returning to the bed apparatus and placing on the mattress 15 after entering the bed leaving mode, that is, before entering the return mode, the vertical drive mechanism 6 or the back raising mechanism 14 is operated. Cannot be activated. Thereby, before the user gets on the mattress 15, the bed frame 4 does not rise and the floor portions of the floor plate 11 do not rise, so that the user who returns to the bed apparatus can return to the mattress 15. It will be able to be placed on top.

Then, when the user is placed on the mattress 15, the landing / leaving detection sensor 21 detects this, and when the user is in the leaving mode, the floor returning mode is set, as shown in FIG. The notification device 38 outputs a return notification to notify the nurse center or the like that the user has returned to the floor. When the wake-up notification is not issued, the monitor mode is set.

  In the state where the user lies on the mattress 15, when the back-up drive mechanism 14 is operated by the remote controller 36 to perform the back-up, the user who lies on the mattress 15 passes the arm through the side fence 9 and the width of the mattress 15. It may protrude outward from one end of the direction. In this case, the user's arm may be sandwiched between the side fence 9 and the rising mattress 15.

  When the mattress 15 rises while the user's arm protruding outward from the widthwise end of the mattress 15 is sandwiched between the side rails 9, the user's arm presses the upper surface of the widthwise end of the mattress 15. Then, that portion of the mattress 15 is deformed.

  Load detection sensors 22 are provided at both end portions in the width direction of one end portion in the longitudinal direction corresponding to the back-up floor portion 12c of the mattress 15, respectively. Therefore, when a load is applied to the end of the mattress 15 in the width direction and the deformation is detected, this is detected by the load sensor 22 that is deformed together with the mattress 15.

  When the remote controller 36 is raising the back, if the load detection sensor 22 detects that the end of the mattress 15 in the width direction is deformed, the sandwiching mode is set. In the pinching mode, even if the back-up operation is performed by the remote controller 36, the back-down operation is automatically reversed as shown in FIG. 9, and the operation is continued while the remote controller 36 is operated. The

  Therefore, since the back-raised floor 12c does not continue to be driven in the back-up direction with the user's arm sandwiched between the upper surface of the mattress 15 and the side fence 9, the user sandwiched between the side fences. The arm can be prevented from being hurt and hurt.

  At this time, while the back raising floor portion 12c is being driven in the downward direction, the buzzer sounds to inform the surroundings, so that it can be recognized by the surroundings that an abnormality has occurred when raising the back. Then, when the back-raised floor 12c is lowered to a predetermined position and the pinching mode is canceled, the monitor pause mode or the monitor mode is entered as shown in FIG.

  When the user rises on the mattress 15 and the rise detection sensor 25 detects this, 0.2 seconds or more elapses and the rise mode is set. In the start-up mode, as shown in FIG. 10, the illuminator 26 is turned on to illuminate the user who has stood up on the mattress 15 and at the same time, the message “Dangerous. Shed from.

  Further, when the rising detection sensor 25 outputs a detection signal, the operation command signal for controlling the vertical drive mechanism 6 and the back drive mechanism 14 is turned off. However, even if the remote controller 36 is operated, the bed frame 4 does not move up and down and the floor portions of the floor plate 11 are not driven up and down. Therefore, it is possible to prevent the user's posture rising on the mattress 15 from becoming unstable and falling down.

  When the detection of the rising detection sensor 25 has no recognition off-time of 1 second or more and is detected for 2 seconds, the notification device 38 notifies the nurse center, caregiver or the like of this by telephone. Furthermore, if the user operates the remote controller 36 with the user up, a buzzer will sound during that time.

  Therefore, by these things, the user can be surely recognized that the user has risen on the mattress 15, and the bed frame 4 is driven up and down while the floor plate 11 is lifted up. Since it is not driven up and down, it is possible to prevent the posture of the rising user from becoming unstable and falling down.

The side view of the bed apparatus which shows one embodiment of this invention. The top view of the bed apparatus shown in FIG. The schematic block diagram of the control system of a bed apparatus. The flowchart which shows monitor sleep mode and monitor mode. Operation | movement explanatory drawing at the time of monitor sleep mode. Operation | movement explanatory drawing at the time of monitor mode. Operation | movement explanatory drawing at the time of a bed leaving mode. Operation | movement explanatory drawing at the time of return mode. Operation | movement explanatory drawing at the time of pinching mode. Operation | movement explanatory drawing at the time of startup mode.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Bed main body, 4 ... Bed frame, 6 ... Vertical drive mechanism, 11 ... Floor board body, 12a-12e ... Floor part, 14 ... Back raising drive mechanism, 15 ... Mattress, 21 ... Landing / leaving detection sensor, 22 ... Load detection sensor, 25 ... rising detection sensor, 27 ... control device, 28 ... control panel, 36 ... remote controller, 38 ... calling device.

Claims (2)

A bed apparatus having a mattress on which a user lies,
The bed body,
A floor plate body which has a plurality of floor portions and is provided on the bed body and on which the mattress is placed;
A drive mechanism that drives at least one of the up-and-down drive of the floor plate body or the undulation drive of the floor portion corresponding to the upper body of the user among the plurality of floor portions of the floor plate body;
A landing / leaving detection sensor provided on the mattress for detecting whether the user is on the mattress;
A load detection sensor that is provided at both ends of the mattress in the width direction and detects that when a load of a predetermined level or more is applied to the mattress when the floor portion is driven in the raising direction;
A rising detection sensor provided on the bed body for detecting that the user has risen on the mattress;
When the landing / leaving detection sensor detects that the user is no longer on the mattress, the detection signal causes the floor to be raised by the drive mechanism before the user is placed on the mattress. disables the drive to, when the user load on the end of the mattress join the load above the load sensor detects when you are on the mattress, raising direction of the floor portion by the drive mechanism by the detection signal When the rising detection sensor detects that the user has risen in the floor plate body, the operation command signal for controlling the driving mechanism is turned off by the detection signal. A bed device comprising: a control device that disables driving of the floor plate body. The control device includes: a monitor sleep mode in which monitoring by the landing / leaving detection sensor and the rising detection sensor is stopped and monitoring by the load sensor; the landing / leaving detection sensor; the rising detection sensor; A monitor mode for monitoring with a load sensor is provided.
The monitor mode is a return / leave mode that monitors whether the user is on the mattress by the landing / leaving detection sensor, and the width direction of the mattress when the floor portion is driven in the rising direction. When the user's arm protruding from the end of the bed is sandwiched between the side rail provided on the bed body and the mattress, the pinching mode for detecting the load applied to the mattress by the load detection sensor and the rising The bed apparatus according to claim 1, further comprising a rising mode in which a detection sensor detects that a user has risen on the mattress.

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