JP3322632B2 - Bed apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed apparatus adapted for nursing or nursing a disabled person such as a demented elderly person or a bedridden elderly person.

[0002]

2. Description of the Related Art An example of a conventional bed apparatus will be described with reference to FIG. 10 (see Japanese Patent Publication No. 3-51411). This bed apparatus has four legs 2 provided in a bed (bed) 1.
Are provided with a load detector 3, and each load detector 3 is electrically connected to a weight measuring and monitoring device 4. The alarm unit 5 is electrically connected to the weight measuring and monitoring device 4 via a cord 26.

According to this bed apparatus, when a user such as a patient is placed on the bed 1, the load detector 3 generates a load signal corresponding to the weight of the user, and the load signal is used as the weight measurement and monitoring device 4. To enter. The weight measuring and monitoring device 4 can calculate the total value of the four load signals and display the weight of the user on a display unit (not shown). As described above, since the weight can be measured while the user is on the bed 6 of the bed 1, the weight of the patient or the elderly with dementia can be easily managed.

[0004] The weight measuring and monitoring device 4 calculates the load such as the weight of the user on the bed 1 at appropriate time intervals, stores the load value in the storage unit, and obtains the load obtained by the previous calculation. A load difference between the value and the load value obtained this time is calculated, and it is determined whether the load difference obtained by this calculation is larger than a predetermined load difference. When it is determined that the load difference calculated this time is larger than a predetermined load difference, a warning signal is sent to the warning unit 5 to turn on a warning lamp and output a warning sound. Thus, when the user is, for example, a demented elderly person, the start of wandering can be notified to a caregiver or a nurse, so that accidents or the like of the demented elderly person can be prevented beforehand.

[0005]

However, in the conventional bed apparatus shown in FIG. 10, it is possible to notify a caregiver or the like that a user, for example, an elderly person with dementia, got off the bed 1, However, there is a problem that the abnormality of the user cannot be detected while the user is on the bed 1.
In other words, it is difficult for a demented elderly person or a bedridden elderly person to accurately convey his / her desire to seek care to a caregiver. It is strongly demanded that people, etc. be notified accurately. In particular, at night, a small number of caregivers or nurses need to care for a large number of elderly people or sick people, so that abnormalities of elderly people sleeping on the bed 1 can be promptly reported to the caregivers. Doing so is strongly desired to protect the health and safety of the cared elderly and to reduce the caregiver's labor.

Therefore, there is a method of monitoring a user sleeping on the bed 1 with a monitor camera, but this method violates the privacy of the user and requires a caregiver to continuously monitor one or many monitors. Is a demanding task, and in many cases the monitor camera cannot be used. Note that an abnormality in a state where the user is on the bed 1 includes, for example, a situation in which the user actively moves on the bed 1. If the user is a demented elderly person, the user may erroneously stand on the bed 1 as well as on the futon of his / her home, and move actively on the bed 1 when trying to stand. Since it is very dangerous for a demented elderly to stand on bed 1, the caregiver must go to care for the elderly.

The alarm unit 5 installed in the waiting room where the caregiver waits and the weight measuring and monitoring device 4 installed in the bed 1 are electrically connected via a cord 26. Since the code 26 is derived from the weight measuring and monitoring device 4, the code 26 is easily noticed by a user such as a demented elderly person who uses the bed 1. Therefore, the code 26 is used by a user such as a demented elderly person. The cord 26 may be withdrawn from the wall on which the cord 26 is provided or from the weight measuring and monitoring device 4. If the cord 26 is pulled out of the weight measuring and monitoring device 4 or the wall, there is a problem that the abnormality of the user cannot be notified to the caregiver.

The present invention particularly provides a bed apparatus capable of detecting and reporting an abnormality in a state of being placed on a bed of a user, and a bed apparatus capable of reliably reporting an abnormality of the user. The purpose is to do.

[0009]

According to a first aspect of the present invention, there is provided a bed,
Load detecting means for detecting a load applied to the bed of the couch and generating a load signal; gravity center calculating means for calculating a center of gravity of a user's weight on the bed based on the load signal; The apparatus includes: a center-of-gravity position determining unit that determines whether a center-of-gravity position calculated by the center-of-gravity position calculating unit is within a preset region of the bed, and a region setting unit that sets the region. It is characterized by the following.

According to a second aspect of the present invention, there is provided a bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and a center of gravity of a user's weight on the bed based on the load signal. Center-of-gravity position calculating means for calculating a position; first warning means for generating a warning signal when a center-of-gravity position calculated by the center-of-gravity position calculating means is within a preset area of the bed; It is characterized by comprising transmitting means for converting the alarm signal into a radio signal and transmitting the signal, and receiving means for receiving the radio signal transmitted from the transmitting means.

According to a third aspect of the present invention, there is provided a bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and detecting a weight of a user on the bed based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position, a moving distance calculating means for calculating a moving distance of the center-of-gravity position based on the plurality of center-of-gravity positions obtained by the calculation by the center-of-gravity position calculating means, Upper limit distance determining means for determining whether the calculated moving distance of the center of gravity position or the total moving distance of two or more moving distances is longer than a preset upper limit distance, and an upper limit distance for setting the upper limit distance And setting means.

According to a fourth aspect of the present invention, in the bed apparatus of the third aspect, the moving distance calculating means calculates the moving distance of the center of gravity position or the total moving distance of two or more moving distances a plurality of times. The setting means sets a moving distance obtained based on a longest one of a plurality of moving distances or a plurality of total moving distances as the upper limit distance.

According to a fifth aspect of the present invention, there is provided a bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and detecting a weight of a user on the bed based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position, a moving distance calculating means for calculating a moving distance of the center-of-gravity position based on the plurality of center-of-gravity positions obtained by the calculation by the center-of-gravity position calculating means, Second alarm means for generating an alarm signal when the calculated moving distance of the center of gravity position or the total moving distance of two or more moving distances is longer than a preset upper limit distance; And transmitting means for receiving the wireless signal transmitted from the transmitting means.

According to a sixth aspect of the present invention, there is provided a bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and detecting a weight of a user on the bed based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position; a moving distance calculating means for calculating a moving distance of the center-of-gravity position based on the plurality of center-of-gravity positions obtained by the calculation by the center-of-gravity position calculating means; Is provided with a lower limit distance determining means for determining whether or not is shorter than a preset lower limit distance, and a lower limit distance setting means for setting the lower limit distance.

According to a seventh aspect of the present invention, there is provided a bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and detecting a weight of a user on the bed based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position; a moving distance calculating means for calculating a moving distance of the center-of-gravity position based on the plurality of center-of-gravity positions obtained by the calculation by the center-of-gravity position calculating means; The lower limit distance determining means for determining whether the distance is shorter than a preset lower limit distance, and the lower limit distance determining means determines that the moving distance is shorter than the lower limit distance. If it is longer than the above, the third warning means for generating a warning signal when the time until the lower limit distance determination means makes the determination is longer than the preset upper limit time, and the warning signal is converted into a radio signal and transmitted. Sending Means, is characterized in that it comprises a receiving means for receiving the radio signal transmitted from the transmitting means.

According to an eighth aspect of the present invention, there is provided a bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and detecting a weight of a user on the bed based on the load signal. A center-of-gravity position calculating unit that calculates a center-of-gravity position; a moving-speed calculating unit that calculates a moving speed of the center-of-gravity position based on a plurality of center-of-gravity positions obtained by calculating the center-of-gravity position calculating unit; The moving speed of the position of the center of gravity obtained by the calculation is a speed determining unit that determines whether or not the speed is higher than a preset upper limit speed, and a speed setting unit that sets the upper limit speed. Is what you do.

According to a ninth aspect, in the bed apparatus according to the eighth aspect, the moving speed calculating means calculates the moving speed of the position of the center of gravity a plurality of times, and the speed setting means obtains the moving speed by the plurality of calculations. The moving speed obtained based on the highest speed among the plurality of moving speeds is set as the upper limit speed.

According to a tenth aspect of the present invention, there is provided a bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and detecting a weight of a user on the bed based on the load signal. A center-of-gravity position calculating unit that calculates a center-of-gravity position; a moving-speed calculating unit that calculates a moving speed of the center-of-gravity position based on a plurality of center-of-gravity positions obtained by calculating the center-of-gravity position calculating unit; A fourth warning unit that generates a warning signal when the moving speed of the calculated center of gravity position is faster than a preset upper limit speed, and a transmission unit that converts the warning signal into a wireless signal and transmits the wireless signal. Receiving means for receiving the wireless signal transmitted from the transmitting means,
It is characterized by having.

According to an eleventh aspect of the present invention, a bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and calculating a weight applied to the bed based on the load signal. Weight calculating means, fifth warning means for generating a warning signal when the weight on the bed obtained by calculation by the weight calculating means is smaller than a preset lower limit weight, and A center-of-gravity position calculating means for calculating the center of gravity of the weight of the user on the bed, and a center-of-gravity position obtained by calculation by the center-of-gravity position calculating means is within a preset area of the bed. A first alarm means for generating an alarm signal.
One or both of the alarm means and the fifth alarm means can be selected, and the selected alarm means has a selection means for enabling generation of an alarm signal. It is a feature.

According to a twelfth aspect, a bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and calculating a weight applied to the bed based on the load signal. Weight calculating means, fifth warning means for generating a warning signal when the weight on the bed obtained by calculation by the weight calculating means is smaller than a preset lower limit weight, and Position calculating means for calculating the position of the center of gravity of the user's weight on the bed, and a movement for calculating the moving distance of the position of the center of gravity based on the plurality of positions of the center of gravity obtained by the calculating means. A distance calculating means for generating an alarm signal when a moving distance of the center of gravity position or a total moving distance of two or more moving distances obtained by the moving distance calculating means is longer than a preset upper limit distance; Warning means 2 In bed device having a second
One or both of the alarm means and the fifth alarm means can be selected, and the selected alarm means has a selection means for enabling generation of an alarm signal. It is a feature.

According to a thirteenth aspect, a bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and calculating a weight applied to the bed based on the load signal. Weight calculating means, fifth warning means for generating a warning signal when the weight on the bed obtained by calculation by the weight calculating means is smaller than a preset lower limit weight, and Position calculating means for calculating the position of the center of gravity of the weight of the user on the bed, and movement for calculating the moving distance of the position of the center of gravity based on the plurality of positions of the center of gravity obtained by the means for calculating the position of the center of gravity. Distance calculating means, lower limit distance determining means for determining whether or not the moving distance of the position of the center of gravity is shorter than a predetermined lower limit distance, and determining that the moving distance is shorter than the lower limit distance; When A third alarm means for generating an alarm signal when the time until the lower limit distance determination means determines that the movement distance is longer than the lower limit distance is longer than a preset upper limit time. In the device,
Either one or both of the third alarm means and the fifth alarm means can be selected, and the selection alarm means comprises a selection means enabling the selected alarm means to generate an alarm signal. It is characterized by the following.

According to a fourteenth aspect, the bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and calculating a weight applied to the bed based on the load signal. Weight calculating means, fifth warning means for generating a warning signal when the weight on the bed obtained by calculation by the weight calculating means is smaller than a preset lower limit weight, and Position calculating means for calculating the position of the center of gravity of the weight of the user on the bed, and movement for calculating the moving speed of the position of the center of gravity based on the plurality of positions of the center of gravity obtained by the calculation by the position of the center of gravity. A bed apparatus comprising: a speed calculating unit; and a fourth alarm unit that generates an alarm signal when a moving speed of the center of gravity obtained by the moving speed calculating unit is higher than a preset upper limit speed. In the fourth Either one or both of the warning means and the fifth warning means can be selected, and the selected warning means comprises a selection means for enabling generation of a warning signal. It is assumed that.

According to the first aspect, the load detecting means detects the load applied to the bed of the bed, and based on the load signal corresponding to the load applied to the bed, the center-of-gravity position calculating means operates the user on the bed. The center-of-gravity position of the weight is calculated, and the center-of-gravity position determining means can determine whether or not the center of gravity of the user on the bed is within a preset area of the bed. Then, an appropriate area can be set by the area setting means. According to the second invention, when the position of the center of gravity of the user on the bed is within a preset area of the bed, the first
Alarm means generates an alarm signal. The transmitting means converts the alarm signal into a radio signal and transmits the radio signal, and the receiving means can receive the radio signal.

According to the third aspect, the moving distance calculating means calculates the moving distance of the center of gravity of the user on the bed, and the moving distance or the total moving distance of two or more moving distances is set in advance. The upper limit distance determining means can determine whether or not the distance is longer than the upper limit distance. Then, an appropriate upper limit distance can be set by the upper limit distance setting means.

According to the fourth invention, the moving distance calculating means of the third invention calculates the moving distance of the position of the center of gravity or the total moving distance of two or more moving distances a plurality of times, and the upper limit distance setting means comprises a plurality of moving distance calculating means. A moving distance obtained based on the moving distance or the longest of a plurality of total moving distances can be set as the upper limit distance.

According to the fifth aspect, when the moving distance of the center of gravity or the total moving distance of two or more moving distances calculated by the moving distance calculating means is longer than the preset upper limit distance, the second moving distance is calculated. Alarm means generates an alarm signal. And
The transmitting unit converts the alarm signal into a radio signal and transmits the radio signal, and the receiving unit can receive the radio signal.

According to the sixth aspect, the lower limit distance determining means can determine whether or not the moving distance of the center of gravity of the user on the bed is shorter than a preset lower limit distance.
Then, the lower limit distance can be set by the lower limit distance setting means.

According to the seventh aspect, the moving distance of the position of the center of gravity is longer than the lower limit distance since the lower limit distance determining means determines that the moving distance of the center of gravity of the user on the bed is shorter than the lower limit distance. When the time until the determination by the lower limit distance determination unit is longer than the preset upper limit time, the third warning unit generates a warning signal. The transmitting means converts the alarm signal into a radio signal and transmits the radio signal, and the receiving means can receive the radio signal.

According to the eighth aspect, the moving speed calculating means calculates the moving speed of the center of gravity of the user on the bed, and determines whether the moving speed of the center of gravity is faster than a preset upper limit speed. Can be determined by the speed determining means.
Then, the upper limit speed can be set by the speed setting means.

According to the ninth invention, the moving speed calculating means of the eighth invention calculates the moving speed of the position of the center of gravity a plurality of times, and the speed setting means calculates the plurality of moving speeds obtained by the plurality of calculations. The moving speed obtained based on the fastest one can be set as the upper limit speed.

[0031] According to the tenth aspect, when the moving speed of the position of the center of gravity of the user on the bed is faster than the upper limit speed, the fourth alarm means generates an alarm signal. The transmitting means converts the alarm signal into a radio signal and transmits the radio signal, and the receiving means can receive the radio signal.

The fifth alarm means of each of the eleventh to fourteenth inventions provides an alarm when the weight on the bed becomes lighter than a predetermined lower limit weight, that is, when the user gets off the bed. Generate a signal. According to the eleventh aspect, a desired alarm means can be selected from the fifth alarm means and the first alarm means. According to the twelfth aspect, the fifth alarm means and the second alarm means According to the thirteenth aspect, a desired alarming means can be selected from the fifth alarming means and the third alarming means. According to the fourteenth aspect, a desired alarm unit can be selected from the fifth alarm unit and the fourth alarm unit, and the selected alarm unit can generate an alarm signal.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a bed apparatus according to the present invention will be described with reference to the drawings. The bed apparatus of this embodiment can be installed and used in each room of a geriatric health facility or the like in which a demented elderly person resides or stays, for example. As shown in the block diagram of FIG. 1B, a large number of couch devices installed in each of these rooms generate an alarm signal transmitted from a transmission antenna 28 of a transmission unit 27 provided in each couch device. For example, it can be transmitted to the receiving antenna 30 (receiving unit 29) of the display / alarm unit 7 installed in a waiting room such as a nurse station where a caregiver or a nurse is waiting. 8 shown in each figure is a bed, 9 (9a-9b) is the 1st-4th load detector, 10
Is a controller.

As shown in FIG. 1A, the bed 8 is a conventionally known bed and has a bed 11 having a rectangular planar shape. The bed 11 is supported by four legs 12 each formed of a caster. The four legs 12 are arranged two by two along the longer edge parallel to the bed 11 and provided at four positions corresponding to the vertices of a rectangle in a plane parallel to the bed 11. . Further, in the four legs 12, the intersection (0) of the two diagonals of the bed 11 coincides with the intersection (0) of the two diagonals of the four legs 12 when viewed from above. It is arranged as follows. Further, four fences 13 (13a to 13d) are provided along each of the four edges of the bed portion 11, and the bed portion 11 is provided.
The upper user is prevented from falling off the bed 11.
However, the two fences 13a and 13b provided on each of the two longer edges parallel to each other are formed to have a length that is approximately half the length of the longer edge of the bed 11. The user 8 can get on and off the bed 8 from two opposing entrance / exit sections 14 and 15 on both sides of the bed 11 where the fence 13 is not provided.

Each of the load detectors 9 (9a to 9b) has a disk shape and a concave upper surface at the center. And FIG.
As shown in (a), it is laid under each of four legs 12, and supports the load of this bed 8 via each leg 12. Each of the four load detectors 9 generates a load signal corresponding to a load supported by each of the load detectors 9 and outputs each of these load signals to a controller 10 that is electrically connected to each of the load detectors 9.

Although not shown in the figure, the controller 10
A central processing unit (CPU) and a storage unit 31 are provided. The storage unit 31 stores various programs for causing the CPU to perform the arithmetic processing shown in the flowcharts of FIGS. 5 to 8 and various data, and can store desired data and programs. is there. The controller 10 includes a center-of-gravity position calculating unit, a weight calculating unit, a moving distance calculating unit, an activity level calculating unit, a moving speed calculating unit (activity speed calculating unit), a weight determining unit, a fifth warning unit, a center-of-gravity position determining unit, The first alarm means, the upper limit distance determining means, the second alarm means, the lower limit distance determining means, the timing means, the time determining means, the third alarm means, the speed determining means, and the fourth alarm means are provided.

Also, on the upper surface of the controller 10, FIG.
As shown in the plan view of FIG.
N switch 16 and OFF switch 17, first to fifth function selection switches 18 (18a to 18e), load detector 9
, And a span adjustment switch 20 (20a to 20d) of each load detector 9 is provided. First to fifth function selection switches 18 (18a to 18e)
The (selection means) includes a corresponding weight determination function (switch 18a), upper limit distance determination function (switch 18b), speed determination function (switch 18c), center of gravity position determination function (switch 18d), and It is provided for each lower limit distance determination function (switch 18e), and is a selection switch for operating a desired function among the functions.

The first to fifth function selection switches 18 (18
According to a) to 18e), a desired alarm signal can be generated by selecting a desired function among the above five functions provided in the bed apparatus, and the user of the bed apparatus can use the selected function. This bed apparatus can be properly used according to, for example, symptoms and medical conditions. As a result, it is possible to prevent a false report by the alarm unit.

Switch 20 for adjusting span of load detector 9
Are provided for each of the corresponding load detectors 9 to adjust the span of each load detector 9. By adjusting the span of each load detector 9, FIG.
When the center of gravity of the user is located at the center O of the bed 11 shown in (a), the center of gravity of the weight calculated by the center-of-gravity position calculating means can be matched with the center O.

As shown in FIG. 2B, four receptacles 21 (21a to 21d) to which the four load detectors 9 are connected are provided on the front of the controller 10. FIG. 2C shows a side view of the controller 10.
As shown in the figure, a receptacle 24 to which a threshold setting device 23 is connected is provided. Further, the controller 10 includes a transmission unit 27 as shown in FIG. The transmission unit 27 includes a storage unit 31 in which data of an individual ID determined for each bed apparatus is stored, and a transmission antenna 28. The transmitting unit 27 converts a multiplexed signal obtained by multiplexing the alarm signal generated by each of the first to fifth alarm units and the data of the individual ID stored in the storage unit 31 into a radio wave and transmits the radio wave from the transmitting antenna 28. is there. Note that the controller 1
0, which is not shown in the figure, includes a battery, and the controller 10 and the load detector 9 are operated by the power of the battery. Therefore, the bed apparatus does not include a power supply cord. Configuration.

The display / alarm unit 7 is installed in, for example, a nurse station (standby room) where a caregiver or a nurse stands by, and includes a receiving unit 29 as shown in FIG. The receiving unit 29 includes a receiving antenna 30. The receiving unit 30 receives a radio wave transmitted from the transmitting antenna 28, and the electromotive force induced in the receiving antenna 30 is amplified and detected by the receiving unit 29, and is individually detected. The ID data is decoded. As a result, the display / alarm unit 7 sets the individual I
It is possible to obtain individual information such as the number of the bed apparatus that generated the alarm signal and the room number from the data of D, display the individual information such as the number, generate an alarm sound, and display the displayed bed apparatus. It is possible to notify the caregiver that the user using the device is in an abnormal state.

The receptacle 24 is connected to a threshold setting device 23 via an RS232C cable 25. The threshold value setting device 23 includes a personal computer, a predetermined program, and input keys (not shown), and includes a weight determining unit, a center of gravity position determining unit, an upper limit distance determining unit, a lower limit distance determining unit, a speed determining unit, and a device for setting the threshold value and the lower limit distance d ₂ as a reference for each of the determination are shown in Table 1 of the time determination means. The threshold setting device 23 can manually set a desired value as each of the thresholds w ₁ , ad ₁ , av ₁ ,..., And the upper limit distance ad of the threshold which is the criterion of the upper limit determining means. _1, and in which the threshold limit speed av ₁ which is a criterion of the speed determining means can be set automatically. The upper limit distance setting means for automatically setting the upper limit distance ad _1, a speed setting means for automatically setting the upper limit speed av _1. The upper limit distance setting means and the speed setting means are means for the CPU of the threshold value setting device 23 to calculate and set the threshold values ad ₁ and av ₁ according to a program stored in the storage unit of the threshold value setting device 23.

As shown in the flowchart of FIG. 5, the upper limit distance setting means calculates the moving distance D of the position of the center of gravity moved by the user on the bed 11 a plurality of times.
It is to set automatically as the longest ones D _max limit the movement distance obtained based on the distance ad 1 _(threshold) among the plurality of moving distance D obtained by calculation of the multiple times. As shown in the flowchart of FIG. 6, the speed setting means calculates the moving speed AV of the position of the center of gravity at which the user has moved on the bed 11 by the moving speed calculating means a plurality of times, and the speed setting means is obtained by the plurality of calculations. The moving speed obtained based on the fastest AV _max among the plurality of moving speeds AV is automatically set as the upper limit speed av ₁ (threshold).

The threshold setting device 23 is used by connecting to the controller 10 when setting a threshold, and is detached from the controller 10 when using the bed device. However, the threshold setting device 23 may be integrated into the controller 10 to form an integrated configuration. The center-of-gravity position calculating means calculates the center-of-gravity position of the user's weight on the bed 11 based on these four load signals at predetermined time intervals when the four load signals generated by the four load detectors 9 are input. Means. In other words, the center-of-gravity position calculating means uses the multiplexer provided in the controller 10
The position of the center of gravity of the weight is calculated based on the four load signals input to the PU. The coordinates of the center of gravity (X, Y) of the weight (hereinafter, referred to as “center of gravity coordinates (X, Y)”)
Is represented by the X and Y orthogonal coordinates shown in FIG. 1A and FIG. The X and Y coordinates are such that the center O on the bed 11 is the origin of the X and Y coordinates, the X axis is parallel to the length of the bed 11, and the Y axis is parallel to the width of the bed 11. ing.

Next, a method of calculating the position of the center of gravity of the weight by the center of gravity position calculating means will be described. Four of the first to the load signal the fourth load detector 9 (9a to 9d) is generated is input to the controller 10, the load signal W ₁₀ ~ in a state where the user is not listed in bed section 11 It is corrected zero by the controller 10 as W ₄₀ becomes zero. Here, when the user is placed on the bed 11, the increase amounts of the load signals generated by the first to fourth load detectors 9 a to 9 d according to the weight of the user are denoted by W _{1 to} W ₄ . The coordinates (X, Y) of the center of gravity of the user on the bed 11 can be calculated by the following equations (1) and (2).

X = (W₁+ W₂-W₃-W₄) ・ (1 / W_T) · (BX / 2) · · (1) Y = (W₁+ W₃-W₂-W₄) ・ (1 / W_T) · (BY / 2) ·· (2) where: X; shown in FIG. 3 with the center O of the bed 11 as the origin 0
Coordinates in the X-axis direction Y; coordinates in the Y-axis direction shown in FIG. 3 with the origin set to 0 BX; spacing in the X-axis direction between the legs 12 of the couch 8 BY; spacing in the Y-axis direction of the legs 12 in the couch 8_TThe weight of the user on the bed 11. The weight W of the user_TIs W_T= W₁
+ W₂+ W₃+ W₄ And this weight W_TIs heavy
The quantity calculating means calculates.

The user's center of gravity coordinates (X, Y) and weight W
_T is the load signal _W 1 to _W-4 of the first to fourth load detector 9a~9d is calculated each time the input to the controller 10. That is, the load signals W _{1 to} W ₄ input to the multiplexer of the controller 10 are sequentially input to the CPU every 0.15 seconds by switching the channels of the multiplexer, and are obtained in 0.15 seconds × 4 = 0.6 seconds. the input to the four CPU load signal _W 1 to _W-4 is completed.
Therefore, the center-of-gravity position calculating means calculates the center-of-gravity coordinates (X, Y) every 0.6 seconds, and the center-of-gravity coordinates (X, Y) obtained by this calculation are stored in the storage unit (X) connected to the CPU of the controller 10. (Not shown). The weight calculation means calculates the weight W _T of the user, with the body weight W _T also stored in the storage unit, is displayed on the display unit of the controller 10 (not shown).

The moving distance calculating means calculates the previous barycentric coordinates ( _XK-1 and YK) obtained by calculating the barycentric position calculating means.
_K-1) and the current center coordinates _(X K, a linear distance (means for calculating a moving distance) D between the _{Y K).} Travel distance D is calculated by from the Pythagorean theorem, calculates the ^{_{D = {(X K -X K}} -1) 2 + (Y K -Y K-1) 2} 1/2 ··· (3) Can be Where K is 1,
2,... Are numbers assigned to the barycentric coordinates calculated by the moving distance calculating means. The activity level calculating means calculates the latest five moving distances D among the moving distances D obtained by sequentially calculating every 0.6 seconds by the moving distance calculating means.
Means for sequentially calculating the sum AD (total moving distance) of
It is included in the moving distance calculation means. Therefore, AD is updated every 0.6 seconds. This AD is called an activity level. Activity level AD is the sum of three seconds of the center of gravity movement distance D of the body weight W _T, it represents the amount of activity of a user on the bed section 11 every 0.6 seconds. However, the activity level calculating means calculates the sum AD of the latest five moving distances D, and sets this AD as the activity level. Instead, the activity level calculating means calculates the sum AD other than the latest five. For example, the sum AD of the moving distances D for four or six of the above may be calculated, and this AD may be set as the activity level. Further, the movement distance D may be set as the activity level AD.

The moving speed calculating means (activity speed calculating means) calculates the moving speed AV of the position of the center of gravity on the basis of the two latest coordinates of the center of gravity (X, Y) obtained by sequentially calculating the center of gravity position calculating means. It is. This moving speed AV
Represents the activity of the user on the bed 11 every 0.6 seconds, and can detect a sudden movement of the user,
It is called activity speed AV. Activity speed A
V is represented by a moving distance D of the center of gravity per 0.6 seconds.
Of course, the speed obtained by calculating the moving distance D / 0.6 seconds may be used as the activity speed.

The weight determining means determines whether or not the user's weight W _T obtained by the weight calculating means, that is, whether the weight on the bed 11 is smaller than a predetermined lower limit weight w _1. It is means for determining. Lower weight w ₁ that is the previously set is set as shown in Table 1, as the threshold of 30kg. The weight on the bed 11 is the lower limit weight w ₁
If the weight determining means determines that the user is lighter, it can be determined that the user is getting off the bed 11. If this determination is made, the fifth warning means generates a warning signal, The display / alarm unit 7 installed in the room where the caregiver is waiting operates. The caregiver recognizes the leaving of the user by the display of the display / alarm unit 7 and the alarm sound, and can go to the user. This makes it possible to prevent wandering when the user is an elderly with dementia.

[0051]

[Table 1]

The center-of-gravity position determining means is such that the center-of-gravity position calculating means is
The center-of-gravity coordinates (X, Y) obtained by the calculation are shown in FIG.
A preset area R near the edge of the floor 11 and its vicinity
₁Or R₂Means for determining whether the
You. This area R₁And R₂ As shown in Table 1,
Period setting value 20cm <X <70cm and | Y |> 20
cm. Area of gravity (X, Y)
R₁Or R₂(The boarding and alighting section 14 of the bed 11,
15) When the center-of-gravity position determination means determines that it is in
The user wakes up and, for example,
Can be determined to be in the state before leaving the bed.
Is determined, the first alarm means generates an alarm signal.
Then, the display / alarm unit 7 operates. The caregiver displays and alerts
Recognize the user's behavior by the display 7 and the alarm sound
To help the user get out of bed.
Can be Conversely, when the user attempts to land
Also, the coordinates (X, Y) of the center of gravity₁Or R₂Range
The caregiver assists the user in getting into the
Can go to the user.

In the upper limit distance determining means, the activity level (moving distance) AD obtained by the calculation by the activity level calculating means is higher (longer) than a preset upper limit level (upper limit distance) ad ₁ = 100 cm.
This is a means for determining whether or not the above is true. Activity level A
When the upper limit distance determination means determines that D exceeds ad ₁ = 100 cm, it can be determined that the user is actively moving on the bed 11 and taking an abnormal action,
When this determination is made, the second alarm means generates an alarm signal and the display / alarm unit 7 operates. This allows the caregiver to go to the user.

The lower limit distance judging means, the timing means, the time judging means, and the third alarm means prevent the user of the bed apparatus from staying on the bed 11 for a long time to prevent the floor from rubbing. It is for. The lower limit distance determining means determines that the moving distance D of the center of gravity obtained by the moving distance calculating means is a lower limit distance d _{2 of} a preset threshold value.
It is means for determining whether or not it is shorter. When the movement distance D of the center of gravity position is determined is shorter the lower limit distance determining means than the lower distance d _2, thereby measured by the time measuring means time the user is not the to motionless regarded as not stuck on the bed portion 11 be able to.

The time measuring means is calculated by the moving distance calculating means.
The moving distance D of the center of gravity position is a preset lower limit distance d.
₂Is shorter than the lower limit distance determination means,
The moving distance D of the center of gravity is the lower limit distance d.₂Longer than and below
A means for measuring the time until the limit distance determination means determines
is there. The time determining means determines in advance the time measured by the timing means.
Set upper limit time h₁ = Longer than 2h (hours)
This is a means for determining whether or not the condition is satisfied. The user is on the bed 11
The time when you are not moving is the upper limit time h₁Exceeding the floor
The time measured by the timekeeping means may be
Time h₁When the time judgment means judges that it is longer than
In the meantime, the third alarm means generates an alarm signal and displays the alarm signal.
Operates. This allows the caregiver to
To turn the user over to prevent floor rubbing
Can be.

The speed determining means determines that the moving speed (activity speed) AV at the position of the center of gravity obtained by the moving speed calculating means is a predetermined upper limit speed av ₁ = 2.
This is a means for determining whether or not it is faster than 5 cm / 0.6 seconds. Since when the user took suddenly quick action such as for example upright in the bed portion 11 is very dangerous, moving speed AV of the center of gravity position, is fast and the speed determination unit than the upper limit speed av ₁ When the determination is made, the fourth alarm means generates an alarm signal and the display / alarm unit 7 operates. This allows the caregiver to go to and care for the user.

According to the bed apparatus configured as described above, the input keys provided on the threshold value setting device 23 are operated to cause the controller 10 to control the threshold values w ₁ and ad shown in Table 1 respectively.
_{1, av} 1, can be set., And the lower limit distance _{d 2.} Note that the controller 10, but the thresholds and the lower the distance d ₂ shown in Table 1 has been set in advance, the user's weight and conditions, the shape of the bed 8, the size, the appropriate threshold according to the structure or the like Can be set.

Next, the threshold setting device 23 sets the upper limit distance ad.
A procedure for automatically setting ₁ and the upper limit speed av ₁ in the controller 10 will be described with reference to FIGS. The reason that the upper limit distance ad ₁ and the upper limit speed av ₁ can be automatically set is that the moving distance (activity level) AD and the moving speed (activity speed) AV of the center of gravity are abnormal for each user. The thresholds ad ₁ and av ₁ differ in degree and are appropriate for each user.
It is troublesome to manually set each time, and it is necessary to set and try a threshold close to it several times before it is possible to determine appropriate thresholds ad ₁ and av ₁ . This is to save these troubles.

The thresholds of both the upper limit distance ad ₁ and the upper limit speed av ₁ are calculated and set in a single operation according to the procedures shown in FIGS. First, before the bed apparatus is operated, a mode switch (not shown) of the controller 10 is switched from the operation mode to the threshold setting mode. Next, the user goes up to the bed 11 to perform a normal turnover or the like. Then, as shown in the flowchart of FIG. 5, the moving distance calculating means calculates the moving distance D, and the threshold setting device 23 calculates the moving distance D as the maximum moving distance D.
_It is stored in the storage unit as _max (S300). Then, the threshold setting device 23 fetches the moving distance D obtained by the moving distance calculating means calculating next (S302), and _{Dm
a x} is equal to or greater than D (S30
4). And D is equal to D _max or D is D
When it is determined to be larger than _max and NO, the moving distance D obtained by the current calculation is set to the maximum moving distance D _max
Is stored in the storage unit (S306). Next, a time T from the time when the first moving distance D is captured by the threshold setting device 23 to the present time is a predetermined threshold capturing time t.
₁ (= 10 minutes) is determined (S30).
8), when it is determined that NO does not exceed the time t _1, it is repeatedly performed the process returns to step S302. However, when it is determined in step S304 that D _max is larger than D and the result is YES, the processing of step S308 is performed without storing the moving distance D obtained by the current calculation as the maximum moving distance D _max .

[0060] Then, in step S308, when the time T up to the present is judged YES exceeds the threshold acquisition time t ₁ from when the first travel distance D is taken to the threshold setting unit 23, the storage unit Memorized D
by calculating the _{(D max + α 1) ×} m against _max sets this calculated value as an upper limit distance ad ₁ (S31
0), this setting of the threshold ad ₁ is completed. Note that α
₁ is a preset constant that can be changed (= 2 cm)
And m is a preset constant that can be changed (= 5
Times).

On the other hand, as shown in the flowchart of FIG. 6, the moving speed calculating means calculates the moving speed (activity speed) AV, and the threshold setting device 23 sets the moving speed A to
V is stored in the storage unit as the maximum moving speed AV _max (S400). Then, the threshold value setting device 23 takes in the moving speed AV obtained by the moving speed calculating means next calculated (S402), and determines whether or not AV _max is larger than AV (S404). And AV is AV
_If it is determined that it is equal to _max or AV is larger than AV _max and NO, the moving speed AV obtained by the current calculation is stored as the maximum moving speed AV _max in the storage unit (S406). Next, a time T from the time when the first moving speed AV is taken into the threshold setting device 23 to the present time is a preset threshold taking time t ₁ (= 1).
0 minutes) (S408), and the time t
_If it does not exceed ₁ and is determined to be NO, step S
Returning to step 402, the above processing is repeated. However, in step _S404, when _{the AV max} is determined largely YES than AV, without storing the moving speed AV obtained by the current calculation as the maximum moving speed _{AV ma x,} the process of step S408.

[0062] Then, in step S408, when the time T from when the first moving speed AV is taken to the threshold setting unit 23 until the current is determined to YES exceeds the threshold acquisition time t ₁ is in the storage unit against the stored _{AV max} and calculates the _{(AV m ax} + α ₂₎ set the calculated value as an upper limit speed av ₁ (S4
10), which set the threshold av ₁ is completed. In addition,
alpha ₂ is a mutable constant set in advance (5 cm in the moving distance per 0.6 seconds).

Next, the operation of the bed apparatus configured as described above and having the threshold set will be described with reference to the flowcharts shown in FIGS. First, the power ON switch 16 is operated. Then, a function required according to the caregiver user is selected from a weight determination function, an upper limit distance determination function, a speed determination function, a center of gravity position determination function, and a lower limit distance determination function, and the selected function is selected. The corresponding switches from the first to fifth function selection switches 18a to 18e are turned on in order to operate (S100). When the zero point correction switch 19 is turned on in a state where the user is not on the bed 11 (S102), the controller 10
Performs zero correction of the first to fourth load detectors 9 (S104). Thereafter, when measuring the weight of the user, when the user is placed on the bed 11, the CPU operates the multiplexer to switch the channel to which the first to fourth load detectors 9 are connected. It is allowed to sequentially measure the load signal _W 1 to _W-4 for each load detector 9 generates (S106). The CPU determines that the number n of the input load signals is four.
Is determined (S108), and when the number n of the input load signals is four or more and the determination is YES, the weight W _T of the user (weight on the bed 11) and the coordinates of the center of gravity are determined. (X, Y), activity level AD, and activity speed AV are calculated (S110). However,
The activity level AD is obtained after being obtained by calculating data of five moving distances D. User weight W
_T is displayed on a display unit (not shown) of the controller 10.

Next, it is determined whether or not the first function selection switch 18a for selecting the weight determination function is ON (S1).
12) If it is ON and YES is determined, the weight W _T obtained by calculation, that is, the weight W _T on the bed 11
There determines whether lighter than the lower weight w ₁ that is set in advance (S114), when the weight W _T of the bed portion 11 has determined that lighter YES than the lower limit weight w _1, the fifth
Alarm means generates an alarm signal, and the display / alarm unit 7 installed in the room where the caregiver is waiting is activated (S22).
0). Thus, it is possible to notify the caregiver that the user has got off the bed 11 and the bed apparatus.

However, in step S112, the first
When the function select switch 18a of is determined to be NO is OFF, and in step S114, the weight W _T of the bed portion 11 has a lower limit weight w ₁ or user has determined that rests on the bed 11 At this time, it is determined whether or not the next second function selection switch 18b is ON (S116). Step S114 is a weight determination unit.

Next, a second method for selecting the upper limit distance determination function is described.
It is determined whether the function selection switch 18b is ON or not.
(S116) If it is ON and determined to be YES,
The activity level AD obtained by calculation is set in advance.
Upper limit distance ad₁To determine if it is longer than
(S200), activity level AD is upper limit distance a
d₁ If the judgment is longer than YES, the second alarm
The stage generates an alarm signal and the display / alarm unit 7 operates (S2).
20). As a result, the user actively moves on the bed 11.
To notify the caregiver
it can.

However, in step S116, the second
When the function selecting switch 18b in is determined to be NO is OFF, and in step S200, when the activity level AD by the user at the upper limit distance ad ₁ less length is determined to be resting on the bed 11 Then, it is determined whether or not the next third function selection switch 18c is ON (S202). Step S200 is the upper limit distance determination means.

Next, it is determined whether or not the third function selection switch 18c for selecting the speed determination function is ON (S2).
02), when it is determined that an ON YES, it is determined whether the fast or not than the upper limit speed av ₁ the activity rate AV obtained by the operation is set in advance (S20
4), when the activity rate AV is determined to YES faster than the upper limit speed av ₁ includes a fourth display alarm unit 7 alarm means generates an alarm signal is activated (S220).
Thus, it is possible to notify the caregiver that the user is performing a sudden action such as standing up on the bed 11 and the bed apparatus.

However, in step S202, the third
When the function select switch 18c of is determined to be NO is OFF, and in step S204, the activity rate AV is the maximum speed av ₁ less speed, determines that the user is at rest on the bed portion 11 when,
It is determined whether or not the next fourth function selection switch 18d is ON (S206). Step S204 is the speed determination means.

Next, it is determined whether or not the fourth function selection switch 18d for selecting the center-of-gravity position determination function is ON (S206). When it is ON and YES, it is obtained by calculation. barycentric coordinates (X, Y) it is determined whether there is a pre have been set region R ₁ or R within ₂ (S2
08), the center coordinates (X, Y) is when it is determined that YES is within the region _{R 1} or _{R 2,} a first alarm means is display alarm unit 7 generates an alarm signal is activated (S220).
Thereby, the user can get on and off the bed part 11 or 15 of the bed part 11.
To the caregiver, for example, that they are sitting on the floor or are about to get off the bed 11 and that bed apparatus.

However, in step S206, the fourth
When the function selecting switch 18d in is determined to be NO is OFF, and in step S208, when the center coordinates (X, Y) is determined to be outside the region _{R 1} or _{R 2,} following the fifth feature of It is determined whether or not the selection switch 18e is ON (S210). Step S208
Is a center-of-gravity position determining means.

Next, it is determined whether or not the fifth function selection switch 18e for selecting the lower limit distance determination function is ON (S210). If it is ON and YES, it is obtained by calculation. moving distance D of the center of gravity, to determine longer or than the lower distance d ₂ which is set in advance (S2
12), when the moving distance D of the center-of-gravity position is determined to lower the distance d ₂ less in length NO, bed user portion 11
Assuming that the user has not moved, the time H during which the user does not move is counted by the timer (S216). The timekeeping means is to count the time H the user is not stuck on the bed portion 11 until the movement distance D of the center-of-gravity position is determined to YES longer than the lower distance d ₂ in step S212, the
When the moving distance D is determined as YES longer than the lower distance d ₂ is timed from zero original time H. Then, in step S218, whether the user determines whether motionless and have no time H is shorter than the upper limit time h ₁ which is set in advance on the bed portion 11, the time H is equal to the upper limit time h ₁ or when it is determined that longer NO than the upper limit time h ₁ is the fourth display alarm unit 7 alarm means generates an alarm signal is activated (S220). This allows the caregiver
It is possible to prevent the floor from rubbing by going to the user and turning the user over. Then, in step S218, when H is determined to YES shorter than the upper limit time h ₁ time, the time counting means continues counting the time H, the process returns to step S104, is repeated in the same manner as described above arithmetic processing.

As described above, according to the bed apparatus of the above embodiment, the user receiving the care does not need to notify the caregiver himself when he / she needs the care, and automatically detects the situation of the user. Thus, it is possible to specifically and automatically notify the caregiver of the situation of the user, for example, that the user is about to get off the bed 11 or the floor is about to be rubbed. As a result, it is possible to improve the service for the person receiving the care, and to reduce the labor of the caregiver for monitoring the person receiving the care.

The transmitting section 27 converts a multiplexed signal obtained by multiplexing the alarm signal generated by each of the first to fifth alarm means and the data of the individual ID stored in the storage section 31 into a radio wave, and converts the multiplexed signal into a radio wave. From the receiving unit 2 of the display alarm unit 7
Numeral 9 receives the transmitted radio wave by the receiving antenna 30, obtains the individual information such as the number of the bed apparatus and the room number which generated the alarm signal from the data of the individual ID, and displays the individual information such as the number. In addition, an alarm sound can be generated. As a result, the weight measuring and monitoring device 4
26 that connects the alarm and the alarm unit 5 to transmit an alarm signal
However, the user such as a demented elderly person is not pulled out of the wall on which the code 26 is provided or the weight measuring / monitoring device 4, and the abnormality of the user can be reliably reported to the caregiver.

In the above embodiment, the transmitting unit 27
The alarm signal generated by each of the first to fifth alarm means and the individual I
The configuration is such that the multiplexed signal obtained by multiplexing the data of D is converted into a radio wave and transmitted from the transmission antenna 28, and the radio wave is received by the reception antenna 30 of the reception unit 29. When each alarm generates an alarm signal,
The transmitting unit transmits infrared light, and the transmitted infrared light is received by the receiving unit provided on the wall or ceiling of the room where the bed apparatus is installed in correspondence with the transmitting unit, and the received signal is received. A configuration is possible in which the display / warning unit 7 transmits the signal to the display / warning unit 7 electrically connected to the receiving unit, displays the individual information such as the number thereof, and generates a warning sound.

Further, this bed apparatus comprises a first to fourth load detectors 9 under each leg 12 of a conventional bed 8, for example.
The existing bed 8 can be used, which is economical.

However, in the above embodiment, the center of gravity position calculating means, the moving distance calculating means, the moving speed calculating means, the weight determining means, the center of gravity position determining means, the upper limit distance determining means, the lower limit distance determining means, the speed determining means, and the time The determining means includes first to first
Each calculation and determination was performed every 0.6 seconds required to complete the input of the load signal of the fourth load detector 9, but instead of this, 0.6 seconds × 2 = 1.2 seconds , Or 0.6 seconds × 3 = 1.8 seconds,..., Or a predetermined time, such as an irregular time, and the respective calculations and determinations may be performed. In the above embodiment, the weight determination function (weight determination means), the upper limit distance determination function (upper limit distance determination means), the speed determination function (speed determination means), the center of gravity position determination function (center of gravity position determination means), and the lower limit distance Although the configuration is provided with the five functions of the determination function (lower limit distance determination means and time determination means), a configuration in which desired functions among the five functions are combined may be employed.

Then, the threshold value setting device 23 of the above embodiment
Is (D) in step S310 shown in FIG.
_max+ Α₁) × m and calculate the calculated value as the upper limit distance.
Leaving ad₁(Threshold)
Instead, in step S310, (D_max× k
₁) × m and calculate the calculated value as the upper limit distance ad.
₁(Threshold) may be set. In addition,
k₁Is a preset changeable coefficient of 1.2.
You. Similarly, the threshold setting device 23 performs the steps shown in FIG.
In S410, (AV_max+ Α₂)
Lever calculation value is converted to upper limit speed av₁Set as (threshold)
However, instead of this, in step S410
And (AV_max× k₂ ) And calculate this calculated value.
Upper limit speed av₁(Threshold)
Good. Note that k₂Is a preset changeable member
Equation 1.2.

Further, the threshold setting device 23 of the above embodiment
Is the upper limit of the activity level AD in the procedure shown in FIG.
Distance ad₁(Threshold) is set, but this
Instead, the upper limit distance a is determined by the procedure shown in the flowchart of FIG.
d₁(Threshold) may be set. First,
Before operating the couch device of the
0 mode changeover switch to threshold setting mode
In addition, the user goes up to the bed portion 11 to perform a normal turnover or the like.
Do. Then the activity level calculation means is activated.
The threshold level setting device 23 calculates the level AD.
Activity level AD to maximum activity level A
D_maxIs stored in the storage unit (S500). Soshi
In addition, the threshold setting device 23
The stage calculates the activity level AD obtained by the next operation.
Import (S502), AD_maxIs larger than AD
It is determined whether or not it is (S504). And AD is AD
_maxIs equal to or AD is AD_maxthan
If it is determined to be NO, it is obtained by the current calculation.
Activity level AD to the maximum activity level
Le AD_maxIs stored in the storage unit (S506).
Next, the first activity level AD is a threshold setting device.
The time T from the time when the data was imported to 23 to the present is preset
Threshold acquisition time t₁(= 10 minutes)
Is determined (S508), and the time t₁ Beyond
If NO is determined, the process returns to step S502.
Repeat the process. However, in step S504,
And AD_maxIs larger than AD and
The activity level obtained by this calculation
Bell AD to maximum activity level AD_maxage
Instead, the process of step S508 is performed.

In step S508, the time T from the time when the first activity level AD is captured by the threshold setting device 23 to the present time is the threshold capturing time t.
₁ , and when it is determined as YES, the value of AD _max stored in the storage unit is (AD _max + α
₃₎ to compute the set of the calculated value as an upper limit distance ad ₁ (S510), this setting of the threshold ad ₁ is completed. Incidentally, alpha ₃ are mutable constant set in advance (= 10 cm).

[0081]

According to the first aspect of the present invention, the center-of-gravity position calculating means can calculate the position of the center of gravity of the user's weight on the bed, so that the caregiver can determine which position the user is on the bed. Can be recognized. When the position on the bed of the user can be recognized, it is possible to determine whether or not the user is awake, and to predict the next action such as whether or not the user is going down from the bed. . The center-of-gravity position determining means can determine whether or not the position of the center of gravity of the user on the bed is within a predetermined area of the bed. In a bed provided with a fence other than the bed, the caretaker can reliably recognize that the user is getting off or going to the bed by setting the boarding area of the bed as a predetermined area. Can be. In addition, for example, an appropriate area determined by the center-of-gravity position determination means in accordance with a difference in the size of the bed or the width of the boarding / alighting section and a change in the position of the boarding / alighting section when the bed is installed along a wall, for example. Since the setting can be made by the area setting means, the bed apparatus of the first invention can be applied without being limited by the shape, size, and installation location of the bed.

Therefore, the position of the user who needs care on the bed and the determination result of the area where the user is on the bed can be recognized at a place away from the bed apparatus, so that the caregiver can be recognized. Is able to go to the user and provide care when the care is needed, and can reliably meet the needs of the user who needs care each time,
It is not necessary for the caregiver to accompany the user continuously, so that the labor of the caregiver can be reduced.

In the second invention, the alarm signal generated by the first alarm means is generated, in the fifth invention, the alarm signal generated by the second alarm means is generated, and in the seventh invention, the third alarm signal is generated. In the tenth invention, the alarm signal generated by the alarm unit is converted into a wireless signal by the transmitting unit, and the wireless signal is received by the receiving unit. Therefore, as in the prior art, the code 2 for connecting the weight measuring / monitoring device 4 and the alarm unit 5 to transmit an alarm signal
6 can be reliably notified to the caregiver of the user's abnormality without being pulled out by the user such as a demented elderly person from the wall on which the code 26 is provided or the weight measuring and monitoring device 4. This has the effect. In addition, the first to fourth
Each of the alarm means generates an alarm signal, so that the caregiver does not need to continuously monitor the position of the center of gravity of the user on the bed, and thus can reduce the labor of the caregiver. Therefore, in a hospital, a facility, or a nursing home that uses a large number of bed devices, a relatively small number of caregivers can efficiently provide care for a large number of elderly or other users.

According to the third aspect, the moving distance calculating means can calculate the moving distance of the position of the center of gravity of the user on the bed, so that the caregiver recognizes the distance the user has moved on the bed. can do. Then, when the upper limit distance determining means determines that the user's travel distance or the total travel distance is longer than the upper limit distance, the user is awake, trying to move away from the bed, or standing on the bed. The caregiver can recognize what he is trying to do, etc., and the caregiver can go to the user and care for him before the user is at risk. As described above, the upper limit distance determination unit automatically determines whether the moving distance or the total moving distance of the center of gravity of the user on the bed is longer than a predetermined upper limit distance. It is not necessary to determine whether or not the user needs to be cared based on the moving distance, and the car can be properly cared for. Also, for example, when caring for a large number of elderly people, since the degree of movement on the bed differs for each elderly person, an appropriate upper limit distance should be set by the upper limit distance setting means according to the degree of movement of each elderly person. Thus, many elderly people can be cared for very effectively.

According to the fourth aspect of the present invention, according to each user such as a demented elderly person using the bed apparatus,
The moving distance or the total moving distance determined to be abnormal on the bed is automatically calculated, and the moving distance can be set as the upper limit distance. In other words, it is necessary to set the upper limit distance so that the user can accurately determine whether or not the user is abnormal. Can be set automatically without multiplying.

According to the sixth aspect, the lower limit distance determining means automatically determines whether or not the moving distance of the center of gravity of the user on the bed is shorter than a preset lower limit distance. There is no need for the caregiver to determine whether or not the user needs to turn over based on the travel distance, and the caregiver can turn over at an appropriate time. In other words, the caregiver
It is difficult to immediately judge whether or not it is necessary to turn over just by looking at the person being cared for, but according to the judgment result of the lower limit distance judgment means, whether or not the user needs to turn over Can be reliably determined, and a user who needs to turn over can be turned over. This prevents a user who does not need to be turned over from turning over, so that sleep is not hindered, and the caregiver's labor for turning over can be reduced. The lower limit distance of the user on the bed can be set by the lower limit distance setting means in accordance with the user's age, medical condition, and the like, whereby an appropriate determination according to the user can be made. The lower limit distance determination means can make the determination.

According to the seventh aspect, whether or not the user on the bed is moving so that the floor is not rubbed can be monitored based on both the moving distance and the time.

According to the eighth aspect, since the moving speed calculating means can calculate the moving speed of the position of the center of gravity of the user on the bed, it is possible to recognize the moving speed of the user moving on the bed. it can. When the moving speed of the user is higher than the upper limit speed, the caregiver can predict that the user is awake, is going to stand on the bed, or is going to leave the bed, etc. In this case, the caregiver can go to the user and care for him, thereby preventing the user from danger. Then, since the speed determining means automatically determines whether or not the moving speed of the center of gravity of the user on the bed is faster than a preset upper limit speed, the caregiver can use the moving speed based on the moving speed. There is no need to determine whether or not the user needs to be cared for, and care can be appropriately provided. Further, since an appropriate upper limit speed can be set by the speed setting means in accordance with the moving speed of the various users on the bed, the user can be cared for very effectively.

According to the ninth invention, the bed apparatus is used in accordance with each user such as a demented elderly person.
The moving speed determined to be abnormal on the bed is automatically calculated, and the moving speed can be set as the upper limit speed. In other words, it is necessary to set the upper limit speed so that the user can accurately determine whether or not the user has an abnormality. Can be set automatically without multiplying.

According to each of the eleventh to fourteenth aspects, a desired alarm means can be selected from the two alarm means provided in the bed apparatus, and the selected alarm means can generate an alarm signal. The couch device can be properly used according to, for example, symptoms and medical conditions of the user of the couch device.

[Brief description of the drawings]

FIG. 1 shows a bed apparatus according to an embodiment of the present invention,
(A) is an external perspective view, (b) is a block diagram showing an electric circuit.

FIG. 2 shows a controller of the bed apparatus according to the embodiment, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 3 shows X and Y on the bed of the bed apparatus according to the embodiment.
It is a figure showing a coordinate.

FIG. 4 is a perspective view showing an area where a first alarm means on the bed of the bed apparatus according to the embodiment generates an alarm signal.

5 is a flowchart showing a procedure for setting thresholds ad ₁ activity level AD of the bed apparatus according to the embodiment.

6 is a flowchart showing a procedure for setting the threshold av ₁ activity rate AV of the bed apparatus according to the embodiment.

FIG. 7 is a flowchart showing an operation procedure of the bed apparatus according to the embodiment.

FIG. 8 is a flowchart showing an operation procedure of the bed apparatus according to the embodiment.

9 is a flowchart showing another example of a procedure for setting a threshold value ad ₁ activity level AD of the bed apparatus according to the embodiment.

FIG. 10 is a perspective view showing a conventional bed apparatus.

[Explanation of symbols]

7 display alarm section 8 bed 9 (9a to 9d) load detector 10 the controller 11 bed unit 23 threshold value setting device R _1, the region of _{R 2} landing section

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-327653 (JP, A) JP-A-6-165770 (JP, A) JP-A 8-280758 (JP, A) JP-A 8- 80286 (JP, A) JP-A-11-223546 (JP, A) JP-B3-51411 (JP, B2) JP-B61-18684 (JP, B2) JP-B-59-45085 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) A61G 7/043

Claims (14)

(57) [Claims] 1. A bed, load detecting means for generating a load signal by detecting a load applied to a bed of the bed, and calculating a center of gravity of a user's weight on the bed based on the load signal. Center-of-gravity position calculating means, a center-of-gravity position determining means for determining whether or not the center of gravity calculated by the center-of-gravity position calculating means is within a preset area of the bed, and setting the area And a region setting means. 2. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and calculating a center of gravity of the weight of the user on the bed based on the load signal. Center-of-gravity position calculating means, first warning means for generating a warning signal when the center-of-gravity position calculated by the center-of-gravity position calculating means is within a preset area of the bed, and A bed apparatus comprising: a transmitting unit that converts the signal into a wireless signal and transmits the signal; and a receiving unit that receives the wireless signal transmitted from the transmitting unit. 3. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and calculating a center of gravity of a user's weight on the bed based on the load signal. A moving distance calculating means for calculating a moving distance of the position of the center of gravity based on a plurality of positions of the center of gravity obtained by the calculating means. Upper limit distance determining means for determining whether the moving distance of the determined center of gravity position or the total moving distance of two or more moving distances is longer than a preset upper limit distance,
A couch device comprising: an upper limit distance setting means for setting the upper limit distance. 4. The bed apparatus according to claim 3, wherein the moving distance calculating means is configured to calculate the moving distance or the moving distance of the position of the center of gravity.
The upper limit distance setting means calculates the total moving distance of the above moving distances a plurality of times, and sets the moving distance obtained based on the longest one of the plurality of moving distances or the plurality of total moving distances as the upper limit distance. A bed apparatus characterized by performing. 5. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and calculating a center of gravity of a user's weight on the bed based on the load signal. A moving distance calculating means for calculating a moving distance of the position of the center of gravity based on a plurality of positions of the center of gravity obtained by the calculating means. A second alarm unit that generates an alarm signal when the moving distance of the determined center of gravity position or the total moving distance of two or more moving distances is longer than a preset upper limit distance, and converting the alarm signal into a wireless signal A bed apparatus comprising: transmitting means for transmitting; and receiving means for receiving the wireless signal transmitted from the transmitting means. 6. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and calculating a center of gravity of a user's weight on the bed based on the load signal. Center-of-gravity position calculating means, moving distance calculating means for calculating the moving distance of the center of gravity based on the plurality of center-of-gravity positions obtained by the calculation by the center-of-gravity position calculating means, and the moving distance of the center of gravity position is preset. A bed apparatus comprising: a lower limit distance determining unit that determines whether the distance is shorter than the lower limit distance; and a lower limit distance setting unit that sets the lower limit distance. 7. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and calculating a center of gravity of a user's weight on the bed based on the load signal. Center-of-gravity position calculating means, moving distance calculating means for calculating the moving distance of the center of gravity based on the plurality of center-of-gravity positions obtained by the calculation by the center-of-gravity position calculating means, and the moving distance of the center of gravity position is preset. The lower limit distance determining means for determining whether or not the moving distance is shorter than the lower limit distance, and when the moving distance is shorter than the lower limit distance and the lower limit distance determining means determines that the moving distance is longer than the lower limit distance. A third warning unit that generates a warning signal when the time until the lower limit distance determination unit determines is longer than a preset upper limit time, and a transmission unit that converts the warning signal into a wireless signal and transmits the signal. this A receiving device for receiving the wireless signal transmitted from the transmitting device. 8. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and calculating a center of gravity of a user's weight on the bed based on the load signal. A center-of-gravity position calculating means, a moving-speed calculating means for calculating a moving speed of the center-of-gravity position based on the plurality of center-of-gravity positions calculated by the center-of-gravity position calculating means, A bed apparatus comprising: speed determination means for determining whether a moving speed of the determined center of gravity position is higher than a preset upper limit speed; and speed setting means for setting the upper limit speed. 9. The bed apparatus according to claim 8, wherein the moving speed calculating means calculates the moving speed of the position of the center of gravity a plurality of times, and the speed setting means calculates the plurality of moving speeds obtained by the plurality of calculations. A moving speed obtained based on the highest moving speed among the moving speeds set as the upper limit speed. 10. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and calculating a center of gravity of a user's weight on the bed based on the load signal. A center-of-gravity position calculating means, a moving-speed calculating means for calculating a moving speed of the center-of-gravity position based on the plurality of center-of-gravity positions calculated by the center-of-gravity position calculating means, A fourth alarm unit for generating an alarm signal when the moving speed of the determined center of gravity is faster than a preset upper limit speed, a transmitting unit for converting the alarm signal into a radio signal and transmitting the radio signal, and the transmitting unit And receiving means for receiving the wireless signal transmitted from the couch. 11. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and weight calculating means for calculating a weight applied to the bed based on the load signal. Fifth alarm means for generating an alarm signal when the weight on the bed obtained by the weight calculation means is smaller than a preset lower limit weight; and the bed section based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position of the weight of the user, and an alarm signal is generated when the center-of-gravity position calculated by the center-of-gravity position calculating means is within a predetermined area of the bed. And the first alarm means, wherein one or both of the first alarm means and the fifth alarm means can be selected, and the selected alarm means outputs an alarm. Generating a signal Bed apparatus characterized by comprising a selection means for allowing. 12. A bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and weight calculating means for calculating a weight applied to the bed based on the load signal. Fifth alarm means for generating an alarm signal when the weight on the bed obtained by the weight calculation means is smaller than a preset lower limit weight; and the bed section based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position of the weight of the user, and a moving distance calculating means for calculating a moving distance of the center-of-gravity position based on the plurality of center-of-gravity positions obtained by calculating the center-of-gravity position calculating means; A second alarming means for generating an alarm signal when the moving distance of the position of the center of gravity or the total moving distance of two or more moving distances calculated by the moving distance calculating means is longer than a preset upper limit distance. And sleeping with In the platform apparatus, one or both of the second alarm means and the fifth alarm means can be selected, and the selection enables the selected alarm means to generate an alarm signal. A bed apparatus comprising means. 13. A bed, load detecting means for detecting a load applied to the bed of the bed and generating a load signal, and weight calculating means for calculating a weight applied to the bed based on the load signal. Fifth alarm means for generating an alarm signal when the weight on the bed obtained by the weight calculation means is smaller than a preset lower limit weight; and the bed section based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position of the weight of the user, and a moving distance calculating means for calculating a moving distance of the center-of-gravity position based on the plurality of center-of-gravity positions obtained by calculating the center-of-gravity position calculating means; A lower limit distance determining unit that determines whether the moving distance of the center of gravity position is shorter than a preset lower limit distance, and when the lower limit distance determining unit determines that the moving distance is shorter than the lower limit distance, Move above A third alarm unit that generates an alarm signal when the time until the lower limit distance determination unit determines that the distance is longer than the lower limit distance is longer than a preset upper limit time; One or both of the third alarm means and the fifth alarm means can be selected, and the selected alarm means has a selection means for generating an alarm signal. A bed apparatus characterized by the above-mentioned. 14. A bed, load detecting means for detecting a load applied to the bed of the bed to generate a load signal, and weight calculating means for calculating a weight applied to the bed based on the load signal. Fifth alarm means for generating an alarm signal when the weight on the bed obtained by the weight calculation means is smaller than a preset lower limit weight; and the bed section based on the load signal. A center-of-gravity position calculating means for calculating a center-of-gravity position of the weight of the user, and a moving speed calculating means for calculating a moving speed of the center-of-gravity position based on a plurality of center-of-gravity positions obtained by calculating the center-of-gravity position calculating means; A fourth alarm unit that generates an alarm signal when the moving speed of the position of the center of gravity obtained by the moving speed calculating unit is higher than a preset upper limit speed. Alarm means 5. A bed apparatus comprising a selection means for selecting any one or both of the five warning means, and enabling the selected warning means to generate a warning signal. .