WO2007066638A1

WO2007066638A1 - Lying state detector of bed

Info

Publication number: WO2007066638A1
Application number: PCT/JP2006/324220
Authority: WO
Inventors: Shingo Noguchi; Kazuo Hirose; Masaharu Tochigi
Original assignee: Showa Denko K.K.
Priority date: 2005-12-06
Filing date: 2006-12-05
Publication date: 2007-06-14

Abstract

A lying state detector of a bed in which a work for attaching the load detector of the bed onto the installation surface of the bed can be facilitated. The lying state detector (1A) of a bed comprises a plurality of load detectors (2) each having a portion for mounting each leg (42) of a bed (40), wherein each load detector (2) is mounted on a bed installation surface (45) and detects a load applied to the leg (42) of the bed (40) when the leg (42) of the bed (40) is mounted on the mounting portion, and the lying state of a subject is detected using signals related to the load of the bed (40) outputted from the plurality of load detectors (2). The lying state detector (1A) of a bed further comprises a plurality of noncontact distance sensors for measuring the distance between a master unit (2A) and slave units (2B), respectively, assuming one of the plurality of load detectors (2) is the master unit (2A) and the remaining load detectors (2) are the slave units (2B).

Description

Specification

Bed status detection device

Technical field

[0001] The present invention is used, for example, in medical institutions, nursing care facilities, general homes, etc., and measures the implantation (entering) of a subject on the sleeping area of a bed, leaving the bed, position in bed, intensity of body movements, body This article relates to the installation method of bed presence detection devices and bed load detectors that detect bed presence conditions such as the type of movement.

Background technology

[0002] Method for detecting bed status of subjects such as sick people, elderly people, care recipients, infants, etc., such as being in bed, leaving bed, and position in bed, etc. The following are known as:

[0003] In other words, a load detector detects the loads applied to each leg of the front, rear, left, and right sides of the bed, and based on these loads, the position of the center of gravity of the subject on the bed (in bed) is determined. position). Then, based on this center of gravity position, the subject's movement distance, movement speed, number of movements, etc. on the bed are calculated, and based on the results, the subject's bed status is detected (for example, patented (see references 1 and 2).

[0004] Furthermore, Japanese Patent Application Laid-open No. 2000-105884 discloses a method for detecting whether a subject is in bed or leaving the bed based on the output voltage for load detection from a load detector that detects the load applied to each leg of the bed. A method is disclosed (see Patent Document 3).

[0005] In these methods, in order to use a load detector to detect the loads applied to each of the front, rear, left, and right legs of the bed, first, multiple loads for the front, rear, left, and right legs are placed on the bed installation surface. The detectors are placed at a predetermined distance from each other, and then the corresponding legs of the bed are placed on the placement parts of these load detectors.

Patent Document 1: Patent No. 3098997

Patent Document 2: Patent No. 3529332

Patent document 3: Japanese Patent Application Publication No. 2000-105884

Disclosure of invention Problems that the invention seeks to solve

[0006] Therefore, when installing these load detectors on the bed installation surface, it is necessary to match the distance between each load detector to the pitch of the legs of the bed. Additionally, the pitch of the bed legs varies depending on the type of bed. Conventionally, when installing each load detector, the distance between each load detector was measured with a tape measure to determine the installation position of each load detector, or a positioning sheet was used to determine the location of each load detector. Decided where to install the device. Therefore, the installation work was very troublesome.

[0007] The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a bed occupancy status detection device that can easily install a bed load detector on a bed installation surface. and to provide a method for installing a bed load detector.

Means to solve problems

[0008] The present invention provides the following means.

[0009] [1] A bed having a plurality of legs includes a plurality of load detectors each having a placing part on which each leg of the bed is placed,

Each of the load detectors is installed on the bed installation surface and detects the load applied to the bed leg when the bed leg is placed on the placement part,

In a bed occupancy state detection device that detects a bed occupancy state of a subject using signals related to the bed load output from the plurality of load detectors,

When one load detector among the plurality of load detectors is used as a parent unit and the remaining plurality of load detectors are used as slave units,

A bed occupancy status detection device comprising a plurality of non-contact distance sensors that respectively measure distances between the parent device and each child device.

[0010] [2] The bed occupancy status detection device according to item 1 above, wherein the distance sensor is mounted on the base unit.

[0011] [3] The distance sensor is an infrared distance sensor mounted on the base unit,

The infrared distance sensor emits infrared rays from a light projecting section mounted on the base device toward a reflecting section mounted on the corresponding slave device, and directs the reflected infrared rays from the reflecting section to the base device. Distance is measured by receiving light with a light-receiving unit mounted on the device. Bed status detection device.

[0012] [4] The distance sensor is an ultrasonic distance sensor mounted on the base unit,

The ultrasonic distance sensor transmits ultrasonic waves from a transmitter mounted on the parent unit to a reflecting unit mounted on the corresponding slave unit, and transmits reflected ultrasonic waves from the reflector to the parent unit. The bed occupancy status detection device according to item 1 above, which measures the distance by receiving signals with a receiving unit installed in the aircraft.

[0013] [5] The bed occupancy status detection device according to any one of the preceding clauses 1 to 4, wherein the distance sensor is highly directional.

[0014] [6] A terminal for inputting the pitch of the bed legs,

Comparison means for comparing the pitch input to the terminal and the distance measured by the distance sensor;

Notification means for emitting a notification signal based on the comparison result of the comparison means;

The bed presence detection device according to any one of items 1 to 5 above, comprising:

[0015] [7] A storage means for storing distances between the parent unit and each child unit corresponding to a plurality of bed types, respectively;

A terminal to enter the type of bed,

The distance between the base unit and each slave unit corresponding to the type of bed inputted in the terminal is selected from among the plurality of distances stored in the storage means, and the distance between the selected distance and the distance sensor is calculated. A comparison means for comparing the measured distance,

[0016] [8] The bed occupancy status detection device according to item 6 or 7 above, comprising display means for displaying the comparison result of the comparison means.

[0017] [9] At least one load detector among the plurality of load detectors is attached with a pole extending higher than the sleeping area of the bed and indicating the position of the load detector. 1~

8. The bed status detection device according to any one of 8.

[0018] [10] The bed occupancy status detection device according to claim 9, wherein a lamp that lights up when a leg of the bed is placed on the placement part is provided at the tip of the pole. . [0019] [11] Casters for moving the bed are provided at the lower end of each leg of the bed, and the load detector is configured to detect when the casters of the bed are placed on the placing portion. 11. The bed status detection device according to item 9 or 10, wherein the bed installation surface force passing through the bed also has a slope surface having an upward slope in a direction in which it advances onto the bed placement portion.

[0020] [12] The bed according to any one of Items 9 to L1, wherein the pole also functions as an antenna that transmits the signal output from the load detector as a radio wave signal. Situation detection device.

[0021] [13] The bed occupancy status detection device according to any one of items 9 to 12 above, wherein the load detector is equipped with an operating power source.

[0022] [14] The bed has a left front leg, a right front leg, a left rear leg, and a right rear leg as the plurality of legs,

Among the plurality of load detectors, a load detector for the left front leg and a load detector for the right front leg, which respectively detect the loads applied to the left front leg and the right front leg of the bed, are equipped with the load detectors described above. A bed occupancy status detection device according to any one of items 9 to 13 above, which is equipped with a pole.

[0023] [15] The bed status detection device according to any one of items 9 to 14 above, wherein the pole is extendable and retractable.

[0024] [16] The bed occupancy status detection device according to any one of items 9 to 15 above, wherein the pole is of a collapsible type.

[0025] [17] The bed presence detection device according to any one of items 9 to 16 above, wherein the load detector is also removable from the pole.

[0026] [18] A plurality of devices for detecting the load applied to each leg of the bed when the plurality of legs of the bed are respectively placed on the corresponding placing parts while the bed is installed on the bed installation surface. In the installation method of bed load detectors,

Install the base unit on the bed installation surface,

Next, when installing each slave unit on the bed installation surface, the base unit and each slave unit are connected to each other. A method for installing a bed load detector, characterized in that the distance is measured by a non-contact distance sensor.

[0027] [19] The bed load detector installation method according to item 18 above, wherein the distance sensor is mounted on the base unit.

[0028] [20] The distance sensor is an infrared distance sensor mounted on the base unit, and the distance measurement by the infrared distance sensor is performed from a light projecting unit mounted on the base unit to the corresponding child. Installation of the bed load detector according to the preceding paragraph 18, which is carried out by projecting infrared rays toward a reflecting section mounted on the machine and receiving the reflected infrared rays from the reflecting section with a light receiving section mounted on the main unit. Method.

[0029] [21] The distance sensor is an ultrasonic distance sensor mounted on the base device, and distance measurement by the ultrasonic distance sensor is performed from a transmitter mounted on the base device, The bed load detector according to the preceding item 18, which is performed by transmitting ultrasonic waves toward a reflecting section mounted on a child unit, and receiving reflected ultrasonic waves from the reflecting section at a receiving section mounted on the base unit. How to install.

[0030] [22] The method for installing a bed load detector according to any one of items 18 to 21 above, wherein the distance sensor is highly directional.

[0031] [23] Installed when the distance measured by the distance sensor is equal to a preset distance, using a notification means that issues a notification signal to the operator,

23. The method for installing a bed load detector according to item 1, wherein the installation position of the child unit is determined based on a notification signal emitted by the notification means.

[0032] [24] Using a display means that displays the distance measured by the distance sensor or displays the amount of deviation of the measured distance from a preset distance,

2. The bed load detector installation method according to any one of the preceding items 18 to 2, wherein the installation position of the child unit is determined based on the display by the display means.

[0033] [25] A sound is emitted as a notification signal to the installation worker by changing the tone in stages depending on whether the distance measured by the distance sensor approaches or moves away from a preset distance. Using notification means,

Before determining the installation position of the handset based on the sound emitted by the notification means Any of Items 18 to 22: A method for installing a bed load detector according to Item 1.

Effect of the invention

[0034] The present invention has the following effects.

[0035] In the invention of [1], when the parent device and the child device are installed on the bed installation surface, the distance between the parent device and the child device is measured by a distance sensor, so that the parent device and the child device can be connected. The base unit and slave unit can be installed at a distance that corresponds to the pitch of the bed legs. Therefore, the load detector can be easily installed on the bed installation surface.

[0036] In the invention of [2], since the distance sensor is mounted on the base unit, the distance sensor must be prepared separately from the base unit when installing the base unit and slave unit on the bed installation surface. There's no need to. Therefore, the installation work of the load detector can be performed even more easily.

[0037] In the invention of [3], the distance between the parent device and the slave device can be reliably measured using an infrared distance sensor as a distance sensor.

[0038] In the invention of [4], the distance between the parent device and the slave device can be reliably measured using an ultrasonic distance sensor as a distance sensor.

[0039] In the invention of [5], since the distance sensor is highly directional, the distance sensor is set in the longitudinal direction of the bed, with the installation position of the base unit installed on the bed installation surface as the reference position (origin) of the bed installation surface. It is possible to determine the angular position of the handset with respect to (or transverse direction). Therefore, the installation work of the load detector can be performed even more easily.

[0040] In the invention of [6], for example, when the distance between the base unit and the slave unit becomes a distance corresponding to the pitch of the legs of the bed, a notification signal issued by the notification means indicates that It is possible to notify the workers.

[0041] The invention of [7] provides the same effects as the invention of [6] above. Furthermore, by inputting the bed type into the terminal, the distance between the base unit and each slave unit corresponding to the input bed type is selected from among multiple distances stored in advance in the storage means. There is no need to enter the distance between the base unit and each child unit corresponding to the bed type. Therefore, the installation work of the load detector can be performed even more easily.

[0042] In the invention of [8], as the comparison result of the comparison means, for example, the amount of deviation between the distance measured by the distance sensor and the preset distance can be displayed by the display means. Therefore , the installation work of the load detector can be performed more easily.

[0043] In the invention of [9], at least one of the plurality of load detectors is provided with a pole extending higher than the sleeping area of the bed and indicating the position of the load detector. Te, Ru. Therefore, even if the load detector is hidden under the bed during bed installation and it is difficult for the bed moving operator to know its position, the bed moving operator will be able to extend it higher than the sleeping area of the bed. The position of the load detector can be determined by the pole. Therefore, by moving the bed using this pole as a guide, the legs of the bed can be reliably moved to the vicinity of the load detector. It can be easily placed on the table.

[0044] In the invention of [10], it is possible to notify the bed moving operator that the bed leg has been placed on the load detector placement part by lighting the lamp.

[0045] In the invention of [11], each load detector has a slope surface, so when placing the casters of the bed legs on the loading portion of the load detector, By passing (traveling) over the bed, the casters of the bed legs can be more easily placed on the load detector placement part.

[0046] In the invention of [12], the pole also functions as an antenna that transmits the signal output from the load detector as a radio signal, thereby making the transmission of the signal to the load detector cordless. As a result, the input signal line to the load detector and the output signal line from the load detector will not get in the way when the bed is moved. Therefore, the legs of the bed can be more easily placed on the placement part of the load detector. Also, if a signal line is connected to the load detector from the outside, there is a risk that the casters of the bed legs will climb over this signal line, causing the signal line to break. However, with the present invention, such problems do not occur.

[0047] In the invention of [13], the load detector is equipped with its operating power supply, so that the power supply to the load detector can be made cordless. This ensures that the power supply line from the external power source to the load detector does not get in the way when the bed is moved. Therefore, the legs of the bed can be more easily placed on the placement part of the load detector. Furthermore, if an external power supply line is connected to the load detector, the caster at the foot of the bed Although there is a risk that the power supply line may be disconnected due to the power supply line being crossed over by the power supply, such a problem does not occur in the present invention.

[0048] The invention of [14] has the following effects. That is, in general, in medical institutions, nursing care facilities, etc., certain equipment such as nurse call buttons and lighting switches are installed near the walls of the room. Therefore, the bed is often set up with the front side of the bed (i.e., the side of the subject's head) against a wall. Furthermore, since the work of moving the bed is usually carried out by one person, when setting up the bed, the person moving the bed pushes the bed from the rear side of the bed (i.e., from the subject's feet). Therefore, among the multiple load detectors, poles were attached to the load detector for the left front leg and the load detector for the right front leg, which respectively detect the loads applied to the left front leg and right front leg of the bed. By attaching the pole, even if both load detectors are hidden under the bed when one person is setting up the bed, the position of each of these load detectors can be known by the pole. Therefore, it is possible to reliably move the left front caster and right front caster of the bed to the vicinity of their respective load detectors, and even if there is only one person moving the bed, the bed casters can be moved close to the load detectors. It can be easily placed on the mounting section.

[0049] In the invention of [15], the pole can be retracted when the pole is not needed. By doing this, when the subject gets on and off the bed (i.e., when getting on and off the bed), doctors, nurses, caregivers, etc. can perform treatments, examinations, tests, nursing care, etc. for the subject on the bed. This prevents the problem of the pole getting in the way when doing so.

[0050] In the invention of [16], since the pole can be folded down when the pole is not needed, the above-mentioned problem can be reliably prevented.

[0051] In the invention of [17], since the pole can be removed when the pole is not needed, the above-mentioned problem can be reliably prevented.

[0052] In the invention of [18], it is possible to easily install the load detector on the bed installation surface.

[0053] In the invention of [19], since the distance sensor is mounted on the base unit, there is no need to prepare the distance sensor separately from the base unit when installing the load detector. Therefore, the installation work of the load detector can be performed even more easily. [0054] In the invention of [20], the distance between the parent device and the slave device can be reliably measured using an infrared distance sensor as a distance sensor.

[0055] In the invention of [21], the distance between the parent device and the slave device can be reliably measured using an ultrasonic distance sensor as a distance sensor.

[0056] In the invention of [22], since the distance sensor is highly directional, it is possible to not only measure the distance between the base unit and the slave unit, but also to measure the installation position of the base unit on the bed installation surface. It is possible to determine the angular position of the handset with respect to the longitudinal direction (or lateral direction) of the bed, which is the reference position (origin) of the installation surface. Therefore, the installation work of the load detector can be performed even more easily.

[0057] In the invention of [23], by determining the installation position of the handset based on the notification signal emitted by the notification means, the handset can be installed at an accurate position.

[0058] In the invention of [24], by determining the installation position of the handset based on the display by the display means, the handset can be installed at an accurate position.

[0059] In the invention of [25], by determining the installation position of the handset based on the sound emitted by the notification means, the handset can be installed at an accurate position.

Brief description of the drawing

[0060] FIG. 1 is a schematic diagram showing a bed occupancy status detection device according to a first embodiment of the present invention in a used state.

[Figure 2] Figure 2 is a plan view of the bed situation detection device with the load detector installed on the bed installation surface.

[Figure 3] Figure 3 is a block diagram of the bed occupancy situation detection device.

[Figure 4] Figure 4 is a schematic diagram showing the configuration of each infrared distance sensor.

[Fig. 5] Fig. 5 is a flowchart showing the installation procedure of the load detector of the bed presence detection device.

[Fig. 6] Fig. 6 is a block diagram of a bed occupancy status detection device according to a second embodiment of the present invention.

[Figure 7] Figure 7 is a schematic diagram showing the configuration of each ultrasonic distance sensor.

[Figure 8] Figure 8 is a flowchart showing the installation procedure of the load detector of the same bed situation detection device. It is a diagram.

[Fig. 9] Fig. 9 is a schematic diagram showing a bed occupancy status detection device according to a third embodiment of the present invention in a used state.

[Figure 10] Figure 10 is a plan view of the bed situation detection device in which the load detector is installed on the bed installation surface.

[Fig. 11] Fig. 11 is a perspective view of a load detector of the bed presence detection device.

[Fig. 12] Fig. 12 is a perspective view of the bed presence detection device in which the pole of the load detector is retracted.

[Figure 13] Figure 13 is a perspective view of the bed presence detection device with the load detector pole removed.

[Fig. 14] Fig. 14 is a perspective view showing a modified example of the load detector of the bed occupancy state detection device of the first embodiment.

[Fig. 15] Fig. 15 is a diagram showing another modification of the load detector of the bed presence detection device of the first embodiment, in which the load detector is placed on the mounting portion of the bed leg. FIG. 2 is a partially cutaway schematic side view showing the device in a state where the device is placed thereon.

[Fig. 16] Fig. 16 is a partially cutaway schematic side view showing the same load detector with the bed leg placed on its placing part.

Explanation of symbols

1A, IB… Bed occupancy status detection device

2…Bed load detector

2A…Main unit

2Β···Slave unit

3…Placement part

4…Non-contact distance sensor

5…Infrared distance sensor

6…Ultrasonic distance sensor

9…Distortion detection sensor

10... Control means 16…Notification means

17...Wireless communication means

18...Power supply

20…Terminal

21...Input means

22...Display means

23…Notification means

24...Wireless communication means

30...Arithmetic unit

40" bed

42...legs

42a…Casters

50...Substrate part

50b…Slope surface

55...Antenna

56...Ponore

57·" lamp

60…Ground surface

61...Concavity

62...Non-slip member

H…Subject

BEST MODE FOR CARRYING OUT THE INVENTION

[0062] Next, some embodiments of the present invention will be described below with reference to the drawings.

[0063] In FIG. 1, (1A) is a bed occupancy status detection device according to the first embodiment of the present invention;

40) is a bed.

[0064] Bed (40) is used in medical facilities (e.g. hospitals), nursing facilities (including nursing facilities; the same applies hereinafter), elderly facilities, general households, etc. 41) is formed into a rectangular shape in plan view (more specifically, a rectangular shape). And this bed (40) can be used in a hospital room, examination room, It is installed on the bed installation surface (45) consisting of the floor surface in examination rooms, nursing rooms, bedrooms, etc.

[0065] Here, in this specification, for convenience of explanation, the subject (H) is placed in a state where the subject (H) sleeps in a supine position on the sleeping area (41) of the bed (40), as shown in FIGS. 1 and 2. , the head side of the subject (H) is the front side of the bed (40), the foot side of the subject (H) is the back side of the bed (40), the left side of the subject (H) is the left side of the bed (40), and the subject The right side of (H) is the right side of bed (40)!/, U.

[0066] The bed (40) has four legs (42, 42, 42, 42) on the front, back, left and right sides that support the bed (41) at a predetermined height position in a substantially horizontal manner. . Rotatable bed movement casters (42a) are provided at the lower ends of these four legs (42, 42, 42, 42), respectively.

[0067] On the sleeping area (41) of this bed (40), there are subjects (H) such as sick people, dementia patients, elderly people, care recipients (including cared people), healthy people, infants, etc. , lying in bed in a supine position for sleeping, resting, recuperation, medical examinations, tests, etc.

[0068] As shown in FIG. 1, the bed presence status detection device (1A) of this embodiment

It is equipped with four load detectors (2, 2, 2, 2) installed on (45), an external calculator (30), and a terminal (20). 2, 2, 2, 2) is used to detect the condition of the subject (H) in bed using the signal related to the load on the bed (40).

[0069] The bed status of the subject (H) detected by this bed status detection device (1A) includes the subject's (H) implantation (entering the bed) on the bed sleeping area (41) and leaving the bed. , position in bed, intensity of body movements, turning over, type of body movements, frequency of body movements, posture in bed, etc.

[0070] The computing unit (30) also functions as a computer, and calculates the test subject ( This is to calculate the bed occupancy status of H).

[0071] This calculator (30) is usually installed in a different location from the four load detectors (2, 2, 2, 2), for example, in a nurse center or monitoring room. It is something that The result calculated by this calculator (30) (that is, the bed availability status) is displayed in real time on a display unit (not shown).

[0072] The terminal (20) is used to input the pitch of the legs of the bed (40), etc. The configuration of this terminal (20) will be described later. [0073] As shown in FIG. 2, each load detector (2) has a placing part (3) on which the corresponding leg (42) of the bed (40) is placed. In this embodiment, as described above, the casters (42a) are provided at the lower end of each leg (42), so that the casters (42a) are provided on the mounting part (3) of each load detector (2). As part (42), casters (42a) can be placed with force.

[0074] Here, in this specification, among the four load detectors (2, 2, 2, 2), the load detector for the right front leg of the bed (40) is referred to as the main unit (2A), and the remaining The three load detectors, namely the load detector for the left leg, the load detector for the right hind leg, and the load detector for the left hind leg, are respectively referred to as child units (2B, 2B, 2B). The base unit (2A) is equipped with a non-contact distance sensor (4) as described later. On the other hand, the slave unit (2B) is not equipped with a distance sensor.

[0075] As shown in Figures 2 and 3, the master unit (2A) and each slave unit (2B) each include a distortion detection sensor (9), a control means (10), and a communication means (17). It is equipped with In this embodiment, the communication means (17) is a wireless communication means. However, in the present invention, this communication means (17) is not limited to being a wireless communication means, but may also be, for example, a wired communication means.

[0076] The strain detection sensor (9) detects the strain of the mounting part (3) of the load detector (2) and its temporal fluctuations, and for example, the strain detection sensor (9) detects the force of one or more strain gauges. It is mounted at a position where it can detect distortion of the mounting part (3) and its temporal fluctuations.

[0077] The control means (10) controls the operation of the load detector (2), and includes an amplification means (11) for amplifying the strain detection sensor (9) and the force output signal (eg, output voltage). , and AZD conversion means (analog Z-digital conversion means) (12) for converting the analog signal power of the signal amplified by the amplification means (11) into a digital signal. Note that the digital signal output from the AZD conversion means (12) corresponds to a signal related to the load applied to the legs (42) of the bed (40).

[0078] The wireless communication means (17) transmits the digital signal etc. output from the AZD conversion means (12) of the control means (10) as a radio signal from an antenna (not shown) to the computing unit (30). It's something.

[0079] The signal transmitted by the wireless communication means (17) is received by the antenna (31) of the wireless communication means mounted on the arithmetic unit (30) (see FIG. 1). And based on this received signal The calculation unit (30) calculates the bed status of the subject (H).

[0080] Furthermore, as shown in FIG. Equipped with a distance sensor (4)!/,ru. Each distance sensor (4) measures distance using the time fob flight method. In the first embodiment, each distance sensor (4) is an infrared distance sensor (5). Therefore, as shown in Figure 3, the base unit (2A) has three pairs of light emitters (5a) and light receivers (5b) that emit and receive infrared (R) light (i.e., the first to third emitters). light receiving part) is installed. On the other hand, each child unit (2B) transmits infrared rays (R) emitted from the corresponding light emitter (5a) of the base unit (2A) to the corresponding light receiver (5b) of the base unit (2A). It is equipped with a reflector (5c) that reflects light towards the target.

[0081] Each infrared distance sensor (5) having a pair of light emitter (5a) and light receiver (5b) is fixedly arranged on a protrusion (8) formed on the top surface of the base unit (2A). has been done. Similarly, the reflective part (5c) is fixedly arranged on the protrusion (8) formed on the top surface of the handset (2B).

[0082] As shown in Figure 4, each infrared distance sensor (5) emits infrared light from the emitter (5a) of the base unit (2A) toward the reflector (5c) of the corresponding slave unit (2B). (R), and the reflected infrared rays from the reflecting section (5c) are received by the corresponding light-receiving section (5b) of the main unit (2A). ) is configured to measure the distance to This distance calculation is performed by a calculation means (13) which will be described later.

[0083] Each infrared distance sensor (5) is highly directional, and is configured as shown in FIG. 4, for example. That is, a pair of corresponding light projecting parts (5a) and light receiving parts (5b) of each infrared distance sensor (5) of the base unit (2A) are arranged adjacent to each other. Shielding plates (7) for increasing directivity are attached to the left and right sides of the light projecting section (5a) and the light receiving section (5b), respectively. In addition, the reflective part (5c) of the same slave unit (2B) is equipped with shielding plates (7) on both the left and right sides to increase directivity. As a result, the infrared rays (R) emitted from the light emitting part (5a) of the base unit (2A) do not spread and travel straight toward the reflection part (5c) of the slave unit (2B). The reflecting part (5c) reflects only the infrared rays (R) that have been traveling straight towards the reflecting part (5c) so that it does not spread towards the light receiving part (5b) of the base unit (2A). Furthermore, the light receiving section (5b) receives only the reflected infrared rays (R) that are heading straight toward the light receiving section (5b). In this way, the directivity of each infrared distance sensor (5) is enhanced.

[0084] Furthermore, as shown in FIG. 3, the control means (10) of the base unit (2A) further includes a calculation means (13), a storage means (15), and a comparison means (14). are doing.

[0085] The calculating means (13) calculates the distance measured by each infrared distance sensor (5) using the time fob flight method. That is, in this calculation means (13), infrared rays (R) are emitted from the emitter part (5a) of the base unit (2A) and received by the light receiver (5b) at the speed of infrared rays (R). Multiply the value by half of the time required to calculate the distance between the base unit (2A) and slave unit (2B). Furthermore, this calculation means (13) performs various predetermined calculations in addition to such distance calculations.

[0086] The storage means (15) stores information such as the pitch of the legs of the bed (40) that is input to the terminal (20).

[0087] The comparison means (14) compares the pitch of the legs of the bed (40) input into the storage means (15) and the distance measured by the infrared distance sensor (5). .

[0088] Furthermore, the calculation means (13) calculates the pitch of the legs of the bed (40) inputted into the terminal (20) (that is, the preset distance) of the distance measured by the infrared distance sensor (5). The amount of deviation relative to is also calculated. Note that the calculation means (13) and the comparison means (14) can also be computers or the like.

[0089] Furthermore, the base unit (2A) has a notification means (16). The notifying means (16) issues a notifying signal to the bed installation worker based on the comparison result of the comparing means (14). Specifically, this notification means (16) determines that the pitch of the legs of the bed (40) input to the terminal (20) and the distance measured by the infrared distance sensor (5) are equal according to the comparison means (14). If it is determined, a notification signal is sent to the bed installation worker. As the notification signal of this notification means (16), notification sound, light, etc. are used. Therefore, the notification means (16) includes a notification speaker (16a) that emits notification sound, a notification lamp (not shown) that emits notification light, and the like. Furthermore, this notification means (16) also emits a notification signal when preparations for installation of the slave unit (2B) are completed and when installation of all units is completed.

[0090] As mentioned above, the wireless communication means (17) of the base unit (2A) transmits the digital signal output from the AZD conversion means (12) to the computing unit (30) as a radio signal. , Furthermore, the comparison result of the comparison means (14) and the calculation result of the calculation means (13) are sent to the terminal (20) as a radio signal. It is used to transmit and receive transmitted data.

[0091] The base unit (2A) also includes power supplies necessary for its operation, including a distortion detection sensor (9), an infrared distance sensor (5), a control means (10), a wireless communication means (17), It is equipped with (built-in) the power supply (18) (operating power supply) necessary for the operation of the notification means (16), etc.

[0092] Each child unit (2B) also has a power supply necessary for its operation, that is, a distortion detection sensor (9

), control means (10), wireless communication means (17), etc. The power supply (18) (operating power supply) necessary for operation is installed (built-in).

[0093] As the power source (18) for the master unit (2A) and slave unit (2B), batteries such as dry batteries, storage batteries, and secondary batteries are used, for example.

[0094] As mentioned above, the terminal (20) is used to input the pitch of the legs of the bed (40), etc., and includes an input means (21), a display means (22), and a notification means (23). and a communication means (24). In this embodiment, the communication means (24) is a wireless communication means. However, in the present invention, the communication means (24) is not limited to being a wireless communication means, but may also be, for example, a wired communication means.

[0095] The input means (21) has a plurality of push buttons such as number keys (see Figure 1), and the center force of these push buttons corresponds to the pitch of the legs of the bed (40). The pitch of the legs of the bed (40) can be input by selecting and pressing the push button. The data regarding the pitch, which has also been inputted by the input means (21), is sent to the display means (22) and is also transmitted as a radio wave signal to the base unit (2A) by the wireless communication means (24). The data sent to the base unit (2A) is received by the antenna (not shown) of the wireless communication means (17) of the base unit (2A), and then sent to the storage means (15) and stored. Ru.

[0096] The display means (22) has, for example, a liquid crystal display or an organic EL display (see Figure 1), and the input means (21) shows the input pitch of the legs of the bed (40) and the infrared distance. It displays the distance measured by the sensor (5) and the amount of deviation of the distance measured by the infrared distance sensor (5) from a preset distance. In addition, examples of the preset distance include the pitch of the legs of the bed (40) to which the input means (21) force is input. This terminal (20) can also be regarded as a display device equipped with display means (22).

[0097] The notification means (23) of the terminal (20) is the same as the notification means (16) of the base unit (2A). Based on the comparison result of the comparison means (14), a notification signal is issued to the bed installation worker. Specifically, this notification means (23) determines that the pitch of the legs of the bed (40) input to the terminal (20) and the distance measured by the infrared distance sensor (5) are equal by the comparison means (14). This system issues a notification signal to the bed installation worker when the bed is installed. As the notification signal of this notification means (23), notification sound, light, etc. are used. Therefore, the notification means (23) includes a notification speaker (23a) that emits notification sound, a notification lamp (23b) that emits notification light, etc. (see FIG. 1). Furthermore, this notification means (23) also emits a notification signal when preparations for installation of the slave unit (2B) are completed and when installation of all units is completed. This terminal (20) can also be regarded as a notification device equipped with notification means (23).

[0098] The wireless communication means (24) of the terminal (20) sends the input means (21) force data (i.e., the pitch of the legs of the bed (40), etc.) to the base unit (2A) using radio waves. It transmits as a signal, and receives the comparison result of the comparison means (14) transmitted by the wireless communication means (17) of the base unit (2A) and the calculation result of the calculation means (13) as a radio wave signal. be.

[0099] The terminal (20) also has a power supply necessary for its operation, that is, an input means (21), a display means (22), a wireless communication means (24), a notification means (23), etc. Equipped with (built-in) power supply (25) (operating power supply).

[0100] As the power source (25) of the terminal (20), a battery such as a dry battery, a storage battery, or a secondary battery is used, for example.

[0101] Next, the method for installing the load detectors (2, 2, 2, 2) in the bed presence detection device (1A) of the first embodiment will be as follows based on the flowchart shown in Figure 5. Explain. Note that each installation procedure is called a step.

[0102] First, among the four load detectors (2, 2, 2, 2), the base unit (2A) is installed at a preset position on the bed installation surface (45) (Step S1). . The installation position of this base unit (2A) is the reference position (origin) of the bed installation surface (45). Note that this main unit (2A) is a load detector for the right front leg of the bed (40) as described above.

[0103] Next, all pitches of the legs of the bed (40) are input into the terminal (20). That is, the distance between the right front leg and the left front leg of the bed (40), the distance between the right front leg and the right rear leg, and the distance between the right front leg and the left rear leg are input to the terminal (20). Input each (Step S2). [0104] Then, these data input to the terminal (20) are transmitted to the base unit (2A) by the wireless communication means (24) of the terminal (20). The transmitted data is received by the wireless communication means (17) of the base unit (2A), and then sent to the storage means (15) and stored as the leg pitch of the bed (40).

[0105] Furthermore, by sending the data to the storage means (15) in this way, or by pressing a reset switch (not shown) provided on the base unit (2A) or the terminal (20), the calculation means (13) ), the values of counter variables N and K are each set to 0 (step S3).

[0106] Next, the calculation means (13) performs the calculation of N=N+K (step S4).

[0107] Next, in the comparison means (14), a determination is made as to whether N = 3 (step S5).

[0108] In this judgment, if N≠ 3, it is judged as "No" and it is judged that the preliminary preparations for installing the slave unit (2B) have been completed, and a signal such as an audible sound or light is emitted to indicate this. It is issued to the bed installation worker by the notification means (16) of the base unit (2A) or the notification means (23) of Z and the terminal (20). On the other hand, if N = 3, it is determined as "Yes" and the installation of all machines is completed. This case will be discussed later.

[0109] When the preparations for installing the handset (2B) are completed, place one of the three handsets (2B, 2B, 2B) on the bed installation surface (45). The bed is temporarily installed at the position estimated by visual measurement by the bed installation worker (Step S6).

[0110] Next, based on the distance between the base unit (2A) and this slave unit (2B), the corresponding infrared distance sensor (5) provided on the base unit (2A) or the terminal (20) is determined. By turning on the operation switch (not shown), the distance is measured by the corresponding infrared distance sensor (5) (step S7). The distance measured by the infrared distance sensor (5) is calculated by the calculating means (13). In addition, the distance measured by this infrared distance sensor (5) is transmitted to the terminal (20) by the wireless communication means (17) of the base unit (2A), and displayed in real time on the display means (22) of the terminal (20). will be displayed.

[0111] When measuring distance using this infrared distance sensor (5), the installation position of the base unit (2A) installed on the bed installation surface (45) is the reference position (origin) of the bed installation surface (45). If the angular position of the child unit (2B) with respect to the longitudinal direction (or lateral direction) of the bed (40) deviates from the predetermined position, the highly directional infrared distance sensor (5) will not be able to measure the distance. to do The distance cannot be measured. Therefore, the distance between the base unit (2A) and the slave unit (2B) is measured by placing the slave unit (2B) at an angular position that does not make it impossible to measure the distance. In this way, when the distance can be measured by the infrared distance sensor (5), it is determined that the handset (2B) is placed at a predetermined angular position, while on the other hand, when the distance cannot be measured, , it can be determined that the handset (2B) is placed at a predetermined angular position.

[0112] Next, in the comparison means (14), the distance measured by the infrared distance sensor (5) and the corresponding pitch of the legs of the bed (40) stored in the storage means (15), that is, the preset distance The distance is compared and a determination is made as to whether the distance measured by the infrared distance sensor (5) is equal to a preset distance (step S8).

[0113] In this determination, if it is determined that they are not equal, the answer is "NO" and the slave unit (2B) is temporarily installed again (step S6). Then, the temporary installation of the slave unit (2B) and the measurement of the distance between the base unit (2A) and the slave unit (2B) are repeated until it is determined that they are equal.

[0114] On the other hand, if it is determined that they are equal, the notification means (16) of the base unit (2A) or the notification means (23) of the Z and terminal (20) will issue a notification sound, light, etc. A signal is issued to the bed installation worker (step S9). By this notification signal, the bed installation worker knows that the distance between the base unit (2A) and the child unit (2B) has become equal to the preset distance, and the notification signal is sent to the child unit (2B). Install it in the same position as when it was installed. In this way, the installation position of the slave unit (2B) is determined.

[0115] Also, the comparison result of this comparison means (14) is that the wireless communication means (17) of the base unit (2A)

(20), and displayed on the display means (22) of the terminal (20) as the amount of deviation of the distance measured by the infrared distance sensor (5) from the preset distance.

[0116] Here, in the present invention, the installation position of the slave unit (2B) may be determined based on the display by the display means (22), that is, the amount of deviation. In other words, while viewing the amount of deviation displayed on the display means (22), the bed installation worker changes the installation position of the slave unit (2B) so that this amount of deviation becomes smaller, and the amount of deviation becomes 0. You can also decide where to install the slave unit (2B).

[0117] When the notification signal is issued by the notification means (16, 23), the counter variable K is set to K=l in the calculation means (13) (step S10). Then, return to step S4. Then, by sequentially performing steps S4 to S10 for the remaining two handsets (2B, 2B), Determine the installation positions for the remaining two slave units (2B, 2B).

[0118] In the judgment (Step S5), if N= 3, it is judged as "Yes" and the installation of all machines is completed (Step S11), and a signal such as audible sound or light is sent to the bed. It is issued to the installation worker by the notification means (16) of the base unit (2A) or the notification means (23) of Z and the terminal (20).

[0119] Next, installation of the bed (40) is started (Step S 12). That is, the corresponding leg (42) of the bed (40) is placed on the placement part (3) of each load detector (2). This completes the installation of bed (4 0).

[0120]The bed occupancy status detection device (1A) of the first embodiment has the following advantages.

[0121] In other words, this bed status detection device (1A) has three distance sensors (4, 4, 4) that measure the distance between the parent device (2A) and each child device (2B). It is equipped with Therefore, when installing the base unit (2A) and slave unit (2B) on the bed installation surface (45), the distance between the base unit (2A) and slave unit (2B) is measured by the distance sensor (4). By doing so, the base unit (2A) and the slave unit (2B) can be installed so that the distance between the base unit (2A) and the slave unit (2B) corresponds to the pitch of the legs of the bed (40). Therefore, the load detector (2) can be easily installed on the bed installation surface (45).

[0122] Furthermore, since the distance sensor (4) is mounted on the base unit (2A), when installing the base unit (2A) and slave unit (2B) on the bed installation surface (45), There is no need to prepare the distance sensor (4) separately from the base unit (2A). Therefore, the installation work of load detector (2) can be done even more easily.

[0123] Further, the distance sensor (4) is an infrared distance sensor (5) mounted on the base unit (2A), and the infrared distance sensor (5) is an infrared distance sensor (5) mounted on the base unit (2A). (5a) emits infrared rays (R) toward the reflecting section (5c) mounted on the corresponding child unit (2 B), and the reflected infrared rays (R) from the reflecting section (5c) are reflected from the main unit ( Distance is measured by receiving light with the light receiving unit (5b) mounted on 2A). Therefore, the distance between the base unit (2A) and the slave unit (2B) can be reliably measured by the infrared distance sensor (5).

[0124] Furthermore, since the infrared distance sensor (5) is highly directional, the installation position of the base unit (2A) installed on the bed installation surface (45) can be changed to the reference position of the bed installation surface (45) ( origin), bed (40) The angular position of the handset (2B) relative to the longitudinal direction (or transverse direction) can be determined. Therefore, the installation work of the load detector (2) can be performed even more easily.

[0125] Furthermore, this bed status detection device (1A) is a terminal for inputting the pitch of the legs of the bed (40).

(20), a comparison means (14) that compares the pitch of the legs of the bed (40) input into the terminal (20) and the distance measured by the infrared distance sensor (5), and the comparison means (14). Based on the comparison results, the device is equipped with a notification means (16, 23) that emits a notification signal such as a notification sound or light. Therefore, when the distance between the base unit (2A) and the slave unit (2B) becomes a distance corresponding to the pitch of the legs of the bed (40), the notification means (16, 23) A notification signal can be used to notify the bed installation worker. Therefore, by determining the installation position of the handset (2B) based on this notification signal, the handset (2B) can be installed at an accurate position.

[0126] Further, the terminal (20) is provided with a display means (22) for displaying the comparison result of the comparison means (14) of the base unit (2A). Therefore, as a comparison result of the comparison means (14), the amount of deviation between the distance measured by the infrared distance sensor (5) and the preset distance can be displayed on the display means (22). Therefore, by determining the installation position of the slave unit based on this amount of deviation, it is possible to install the slave unit (2B) in an accurate position, which further facilitates the installation work of the load detector (2). can be done.

[0127] FIG. 6 is a block diagram of a bed occupancy status detection device (1B) according to the second embodiment of the present invention. The configuration of the bed occupancy status detection device (1B) of the second embodiment will be explained below, focusing on the differences from the bed occupancy status detection device (1A) of the first embodiment.

[0128] In this bed presence detection device (1B), the base unit (2A) is equipped with three ultrasonic distance sensors (6) as non-contact distance sensors (4). Therefore, the base unit (2A) is equipped with three pairs of transmitting parts (6a) and receiving parts (6b) that emit and receive ultrasonic waves (U) (i.e., the first to third transmitting and receiving parts). . On the other hand, each handset (2B) transmits the ultrasound waves (U) emitted from the corresponding transmitter (6a) of the base unit (2A) to the corresponding receiver (6b) of the base unit (2A). It is equipped with a reflector (6c) that reflects the light toward the target.

[0129] As shown in Figure 7, each ultrasonic distance sensor (6) transmits an ultrasonic wave from the transmitting part (6a) of the base unit (2A) to the reflecting part (6c) of the corresponding slave unit (2B). A sound wave (U) is emitted, and the reflection part (6c) reacts with force. It is configured to measure the distance between the base unit (2A) and each child unit (2B) by receiving the emitted ultrasonic waves (U) at the corresponding receiving unit (6b) of the base unit (2A)! ,ru.

[0130] The calculation means (13) calculates the distance measured by each ultrasonic distance sensor (6) using the time fob flight method. That is, in the calculation means (13), the ultrasonic wave (U) is transmitted from the transmitter (6a) of the base unit (2 A) at the speed of the ultrasonic wave (U) and is received by the receiver (6b). Multiply the value by half of the time required to calculate the distance between the base unit (2A) and slave unit (2B).

[0131] Each ultrasonic distance sensor (6) is highly directional, and is configured as shown in FIG. 7, for example. That is, a pair of corresponding transmitting parts (6a) and receiving parts (6b) of each ultrasonic distance sensor (6) of the base unit (2A) are arranged adjacent to each other. Shielding plates (7) for increasing directivity are attached to the left and right sides of the transmitter (6a) and the receiver (6b), respectively. In addition, the reflective part (6c) of the same slave unit (2B) is equipped with shielding plates (7) on both the left and right sides to increase directivity. As a result, the ultrasonic waves (U) emitted from the transmitter (6a) of the base unit (2A) do not spread, but go straight toward the reflector (6c) of the slave unit (2B), and are reflected. The part (6c) reflects only the ultrasonic waves (U) that have gone straight towards the reflecting part (6c) so that they do not spread towards the receiving part (6b) of the base unit (2A). Furthermore, the receiving section (6b) receives only the reflected ultrasound (U) that has gone straight toward the receiving section (6b). In this way, the directivity of each ultrasonic distance sensor (6) is enhanced!/,ru.

[0132] Furthermore, the storage means (15) of the base unit (2A) stores the distances between the base unit (2A) and each slave unit (2B) as a database, corresponding to the types of multiple beds (40). It is something to do. For example, in this storage means (15), the distances between the base unit (2A) and each slave unit (2B) corresponding to the five types of bed model numbers A to E assigned by bed manufacturers are stored in advance as a database. be remembered.

[0133] Furthermore, the terminal (20) is used to input the type of bed (40) to be installed (to be installed). For example, if the type of bed (40) you are trying to install is bed model number A out of five types of bed model numbers A to E, press the push button of the input means (21) corresponding to bed model number A. , or by selecting the one corresponding to bed model number A using a selection switch (not shown), the type of bed (40) can be entered. The input data regarding the type of bed (40) is sent to the display means (22) and is also sent as a radio signal to the base unit (2A) by the wireless communication means (24). Data sent to base unit (2A) is received by the antenna (not shown) of the wireless communication means (17) of the base unit (2A), and then transmitted to the base unit (2A).

Sent to comparison means (14) in 2A).

[0134] The comparison means (14) of the base unit (2A) is the distance between the base unit (2A) and each child unit (2B) that corresponds to the type of bed (40) entered in the terminal (20). is selected from a plurality of distances (i.e., a database) stored in the storage means (15), and the selected distance is compared with the distance measured by the ultrasonic distance sensor (6). .

[0135] The other configuration of the bed presence detection device (1B) of the second embodiment is the same as the bed presence detection device (1A) of the first embodiment.

[0136] Therefore, the load detector (2

) will be described below based on the flowchart shown in FIG. 8, focusing on the differences from the first embodiment.

[0137] In the second embodiment, in step S2', the type of bed (40) to be installed is input to the terminal (20).

[0138] Then, the input data regarding the type of bed (40) is transmitted to the wireless communication means of the terminal (20).

(24) is sent to the base unit (2A). The transmitted data is received by the wireless communication means (17) of the base unit (2A) and then sent to the comparison means (14).

[0139] In addition, by sending the data to the comparison means (14) in this way, or by pressing a reset switch (not shown) provided on the base unit (2A) or the terminal (20), the calculation means (13) ), the values of counter variables N and K are each set to 0 (step S3).

[0140] In step S7', regarding the distance between the base unit (2A) and the slave unit (2B), the operation of the corresponding ultrasonic distance sensor (6) provided on the base unit (2A) or the terminal (20) is performed. By turning on a switch (not shown), the distance is measured by the corresponding ultrasonic distance sensor (6). The distance measured by this ultrasonic distance sensor (6) is calculated by the calculation means (13). The distance measured by this ultrasonic distance sensor (6) is transmitted to the terminal (20) by the wireless communication means (17) of the base unit (2A) and displayed in real time on the display means (22) of the terminal (20). be done.

[0141] When measuring distance using this ultrasonic distance sensor (6), the installation position of the base unit (2A) installed on the bed installation surface (45) is set to the reference position (origin) of the bed installation surface (45). ), and the angular position of the handset (2B) with respect to the longitudinal direction (or transverse direction) of the bed (40) is at the specified position. If it is misplaced, the highly directional ultrasonic distance sensor (6) will not be able to measure the distance, making it impossible to measure the distance. Therefore, the distance between the base unit (2A) and the slave unit (2B) is measured by placing the slave unit (2B) at an angular position that does not make it impossible to measure the distance. In this way, when the distance can be measured by the ultrasonic distance sensor (6), it is determined that the handset (2B) is placed at a predetermined angular position, while on the other hand, when the distance cannot be measured, It can be determined that the handset (2B) is placed at a predetermined angular position.

[0142] In step S8', the comparison means (14) calculates the distance between the base unit (2A) and each child unit (2B) corresponding to the type of bed (40) input to the terminal (20). The selected distance is selected from a plurality of distances (that is, a database) stored in advance in the storage means (15), and the selected distance is compared with the distance measured by the ultrasonic distance sensor (6). A determination is made as to whether the measured distance according to 6) is equal to the selected distance (that is, a preset distance).

[0143] If it is determined that they are not equal, the answer is "NO" and the handset (2B) is temporarily installed again (step S6). Then, the temporary installation of the slave unit (2B) and the measurement of the distance between the base unit (2A) and the slave unit (2B) are repeated until it is determined that they are equal.

[0144] On the other hand, if it is determined that they are equal, the notification means (16) of the base unit (2A) or the notification means (23) of the Z and terminal (20) will issue a notification sound, light, etc. A signal is issued to the bed installation worker (step S9). By this notification signal, the bed installation worker knows that the distance between the base unit (2A) and the child unit (2B) has become equal to the preset distance, and the notification signal is sent to the child unit (2B). Install it in the same position as when it was installed. In this way, the installation position of the slave unit (2B) is determined.

[0145] Furthermore, the comparison result of this comparison means (14) is that the wireless communication means (17) of the base unit (2A)

(20), and displayed on the display means (22) of the terminal (20) as the amount of deviation of the distance measured by the ultrasonic distance sensor (6) from the preset distance.

[0146] The other steps of the method for installing the load detector (2) in the second embodiment are the same as in the first embodiment.

[0147] Thus, the bed occupancy status detection device (1B) of the second embodiment has the following advantages.

[0148] That is, this bed status detection device (1B) corresponds to each of the plurality of bed types (40). a storage means (15) for storing the distance between the base unit (2A) and each slave unit (2B), a terminal (20) for inputting the type of bed (40) to be installed, and the terminal ( The distance between the base unit (2A) and each child unit (2B) corresponding to the type of bed (40) input in step 20) is selected from among the multiple distances stored in advance in the storage means (15). In addition, it is provided with comparison means (14) for comparing the selected distance and the distance measured by the ultrasonic distance sensor (6). Therefore, by inputting the type of bed (40) to be installed on the terminal (20), the distance between the base unit (2A) and each slave unit (2B) corresponding to the input type of bed (40) can be determined. is selected from multiple distances pre-stored in the storage means (15), so you have to take the trouble to enter the distance between the base unit (2A) and each child unit (2B) that corresponds to the type of bed (40). There's no need to. Therefore, the installation work of the load detector (2) can be performed even more easily.

[0149] Other advantages of the bed presence detection device (1B) of the second embodiment are the same as those of the first embodiment.

[0150] Several embodiments of the present invention have been described above, but the present invention is not limited to those shown in the above embodiments and can be changed in various settings.

[0151] For example, in the present invention, the base unit (2A) or Z and the terminal (20) are different from each other when the distance measured by the distance sensor (4) approaches a preset distance and when it moves away from the preset distance. It may also be provided with a notification means (e.g., a speaker) that changes the tone in stages and emits a sound as a notification signal to the person installing the bed. Alternatively, a separate notification device having such notification means may be provided. In these cases, by determining the installation position of the handset (2B) based on the sound emitted by the notification means, the handset (2B) can be installed at an accurate position.

[0152] Furthermore, the notification means may be provided in at least one of the base unit (A2), the terminal (20), and the slave unit (2B).

[0153] Furthermore, in the present invention, the bed presence detection device (1A) of the first embodiment may be configured as follows. In other words, the storage means (15) of the master unit (2A), like the storage means (15) of the second embodiment, stores the master unit (2A) and each slave unit corresponding to the types of the plurality of beds (40), respectively. The terminal (20) is used to input the type of bed (40), which is the same as the terminal (20) in the second embodiment, and the terminal (2B) is used to input the type of bed (40). The comparison means (14) of 2A) is the same as the comparison means (14) of the second embodiment described above, which is the same as the comparison means (14) of the second embodiment. The distance between the base unit (2A) and each slave unit (2B) corresponding to the type of code (40) is selected from among the multiple distances stored in the storage means (15), and the selected distance and infrared rays are The distance measured by the distance sensor (5) may be compared.

[0154] Further, in the present invention, in the bed presence status detection device (1A) of the first embodiment, the distance sensor (4) may be the ultrasonic distance sensor (6) adopted in the second embodiment above. good ,.

[0155] Further, in the present invention, the bed presence detection device (1B) of the second embodiment may be configured as follows. That is, the terminal (20), like the terminal (20) of the first embodiment, is used to input the pitch of the legs of the bed (40), and also the storage means (15) of the base unit (2A). The storage means (15) of the first embodiment stores the pitch of the legs of the bed (40) that is input to the terminal (20), and also the comparison means (2A) of the base unit (2A) 14) may be one that compares the pitch input to the terminal (20) and the distance measured by the ultrasonic distance sensor (6).

[0156] Further, in the present invention, in the bed presence detection device (1B) of the second embodiment, the distance sensor (4) may be the infrared distance sensor (5) employed in the second embodiment.ヽ.

[0157] Further, in the present invention, the number of legs of the bed (40) is not limited to four, but may be three or more, for example. Further, the number of load detectors (2) is not limited to four, and may be three or more, for example.

[0158] Furthermore, in the present invention, the bed moving casters (42a) do not necessarily need to be provided at the lower ends of the legs (42) of the bed (40).

[0159] FIGS. 9 to 13 are diagrams for explaining a bed occupancy state detection device (1C) according to the third embodiment of the present invention. The configuration of the device (1C) of the third embodiment will be described below, focusing on the differences from the device (1A) of the first embodiment.

[0160] This bed situation detection device (1C) has four load detectors (2, 2, 2,

Of 2), a left front leg load detector (2F) and a right front leg load detector detect the loads applied to the left front leg (42) and right front leg (42) of the bed (40), respectively. (2F) is equipped with a metal pole (56) that indicates the position of the load detector (2) and extends higher than the sleeping area (41) of the bed (40).

[0161] This pole (56) is telescopically extendable as shown in Figures 11 and 12. It is.

[0162] Furthermore, this pole (56) has a removable load detector (2F) as shown in FIG. That is, a pole mounting hole with a circular cross section is provided in the side frame portion of the base plate (50) of the load detector (2F) (i.e., the frame portion of the base plate (50) facing outward from the bed (40)). (5 0a) is provided. On the other hand, the lower end (56a) of the pole (56) is bent into a substantially L-shape. Then, the tip of the bent lower end (56a) of this pole (56) is firmly inserted into the pole mounting hole (50a) so that it can be pulled out and rotated, so that the pole (56) can detect the load. It is removably attached to the side frame of the base plate (50) of the container (2F). When removing this pole (5 6) from the load detector (2F), grasp the lower end (56a) of the pole (56) with your hand and insert the tip of the lower end (56a) of the pole (56) into the pole. The pole (56) is removed by forcibly pulling it out from within the mounting hole (50a).

[0163] In addition, in the present invention, the tip of the lower end (56a) of the pole (56) is connected to the tip of the lower end (56a) of the pole (56) to prevent the force inside the pole mounting hole (50a) from being inadvertently extracted. The load detector (2F) may be equipped with a locking mechanism to lock the lower end (56a) of the pole (56), and the tip of the lower end (56a) of the pole (56) may be fitted with a fastening member such as a screw (not shown). ) may be removably fixed to the load detector (2F).

[0164] Furthermore, this pole (56) is of a collapsible type. In other words, as shown in Fig. 12, this pole (56) extends from an upward position to a position where it falls horizontally along the front-rear direction (i.e., length direction) of the load detector (2F). It is attached to the side frame of the board (50) of the load detector (2F). In this embodiment, as described above, since the tip of the bent lower end (56a) of the pole (56) is rotatably inserted into the pole attachment hole (50a), the pole (56) If you want to knock down the pole (56), grab the pole (56) with your hand and apply force in the direction of the pole (56). Then, the pole (56) rotates within the pole mounting hole (50a) using its lower end (56a) as the rotation axis, and the pole (56) is configured to fall down! ,ru.

[0165] Also, as shown in Figure 9, the load applied to the left rear leg and right rear leg of the bed (40) among the four load detectors (2, 2, 2, 2) is The load detector for left hind leg (2R) and the load detector for right hind leg (2R) that respectively detect the above-mentioned load detector for left front leg (2F) and load detector for right front leg, respectively. The pole (56) has the same structure as the pole (56) of the container (2F). It is set up. That is, this pole (56) is extendable and removable, and is also collapsible. However, this pole (56) does not extend higher than the sleeping area (41) of the bed (40). In other words, this pole (56) is in a shortened state.

[0166] The detailed configuration of the four load detectors (2, 2, 2, 2) is as follows.

[0167] The mounting portion (3) of each load detector (2) is supported approximately horizontally in a cantilevered manner by the front frame portion of the substrate portion (50). In this supported state, the distal end (that is, the free end) of the placing portion (3) is located near the rear frame portion of the substrate portion (50). On the other hand, as shown in Fig. 11, the upper surface of the rear frame of the base plate (50) is such that the casters (42a) of the legs (42) of the bed (40) are connected from the bed installation surface (45) to the placing part (3). ) is formed into a slope surface (50b) with an upward slope in the direction from the bed installation surface (45) to the top of the placing section (3), which the bed passes when being placed on the bed (50b).

[0168] Furthermore, each pole (56) of the four load detectors (2, 2, 2, 2) is used not only to indicate the position of each load detector (2), but also to indicate the load. It also functions as a wireless communication antenna (55) that transmits the signal output from the detector (2) as a radio signal. Signals output from the load detector (2) include signals related to the load on the bed (40), signals related to the distance between the parent unit (2A) and the child unit (2B), and the like. Furthermore, this pole (56) also functions as an antenna for receiving signals transmitted from the terminal (20) and the load detector (2).

[0169] To be more specific, the signals output from the three slave units (2B, 2B, 2B) among the four load detectors (2, 2, 2, 2) are The power of the pole (56) acting as the antenna (55) of 2B) is also transmitted towards the base unit (2A) or the computing unit (30). This transmitted signal is then received by the pole (56) serving as the antenna (55) of the base unit (2A) or by the antenna (31) of the arithmetic unit (30).

[0170] The signal output from the base unit (2A) is transmitted from the pole (56) serving as the antenna (55) of the base unit (2A) toward the terminal (20) or the computing unit (30). This transmitted signal is then received by an antenna (not shown) of the terminal (20) or an antenna (31) of the computing unit (30).

[0171] As shown in Figure 9, among the four load detectors (2, 2, 2, 2), the load detector for the left front leg (2F) and the load detector for the right front leg (2F) are The poles (56) are respectively connected to the load detector (2F). To indicate the position, it is used when the bed (40) is extended higher than the sleeping area (41). On the other hand, the poles (56) of the left hind leg load detector (2R) and the right hind leg load detector (2R) are used in a retracted state.

[0172] In addition, as shown in Figure 10, each load detector (2) is equipped with a power source necessary for its operation, that is, a strain detection sensor (9), an infrared distance sensor (5), and a control means ( 10), wireless communication means (17), notification means (not shown), etc. The power supply (operating power supply) (18) necessary for operation is installed (built-in). As this power source (18), for example, a battery such as a dry battery, a storage battery, or a secondary battery is used. Thereby, power supply to each load detector (2) is made cordless. In other words, the power supply line that supplies power from an external power source is not connected to each load detector (2), and each load detector (2) is powered by the power supply (18) mounted on each load detector (2). ) is configured to work.

[0173] Here, as mentioned above, not only is the signal transmission to each load detector (2) cordless, but also the power supply to each load detector (2) is cordless. , each load detector (2) is fully cordless with no external connection wires.

[0174] Also, at the tip of each pole (56), the casters (42a) of the corresponding legs (42) of the bed (40) are placed on the mounting part (3) of the load detector (2). A lamp (57) is provided that lights up (including flashing) when the device is placed (see Figure 11). In other words, each load detector (2) switches the power supply from the power source (18) to the lamp (57) using a switch ( (not shown). The casters (42a) of the corresponding legs (42) of the bed (40) are placed on the placing part (3), and each load detector (2) is placed in a predetermined position on the placing part (3). For example, when a load of 147N (15kgf) or more is applied, the switch turns ON and the lamp (57) lights up, while the upper force of the mounting section (3) also lowers the casters (42a). When the load applied to the mounting portion (3) becomes less than the above-mentioned predetermined load, the switch is turned OFF and the lamp (57) is turned off. ,ru.

[0175] Next, the bed (40) is placed on the bed installation surface ( 45) How to install the bed (40) on top is explained below. [0176] First, as shown in FIGS. 9 and 10, four load detectors (2, 2, 2, 2) are installed at predetermined positions on the bed installation surface (45). At this time, the distance between the base unit (2A) and each slave unit (2B) is measured by the infrared distance sensor (5) according to the same procedure as in the first embodiment. As a result, the distance between the base unit (2A) and each slave unit (2B) is made to correspond to the pitch of the legs (42) of the bed (40).

[0177] In addition, the antenna/pole (56) of the left front leg load detector (2F) and the right front leg load detector (2F) was extended higher than the sleeping area (41) of the bed (40) in advance. I'll keep it. Meanwhile, the antenna and poles (56, 56) of the remaining two load detectors (2R, 2R) are shortened in advance.

[0178] Next, the bed moving worker stands on the back side of the bed (40) (that is, on the foot side of the subject (H)) and pushes the bed (40) forward from the back side of the bed (40), moving the four Move it towards the load detector (2, 2, 2, 2). During this process, the four load detectors (2, 2, 2, 2) are hidden under the bed (40) and are no longer visible to the bed moving worker. At this time, among the four load detectors (2, 2, 2, 2), the load detector for the left hind leg (2R) and the load detector for the right hind leg (2R) are Since it is located near the mobile worker, it can be easily seen by bending the upper body of the bed mobile worker, and its position can be known. On the other hand, the load detector for the left front leg (2F) and the load detector for the right front leg (2F) are located far away from the bed moving worker's force, so the bed moving worker's upper body must be bent. However, it is difficult to see them, and it is extremely difficult to know their location.

[0179] However, since the poles (56, 56) of both load detectors (2F, 2F) extend higher than the sleeping area (41) of the bed (40), both poles (56, 56) Don't hide in bed (40). Therefore, move the bed (40) using these two poles (56, 56) as landmarks. By doing this, each caster (42a) of the bed (40) can be reliably moved to the vicinity of the corresponding load detector (2).

[0180] After each caster (42a) of the bed (40) is moved to the vicinity of the corresponding load detector (2), each caster (42a) is moved from the bed installation surface (45) to the corresponding load detector. Pass (run) over the slope surface (50b) of the container (2) and place it on the mounting section (3). Then, the lamp (57) at the tip of the pole (56) lights up, and the person moving the bed knows that the caster (42a) has been accurately placed on the placement part (3). Can be done. [0181] The above operations complete the installation of the bed (40).

[0182] The bed occupancy status detection device (1C) of the third embodiment has the following advantages in addition to the advantages of the first and second embodiments.

[0183] That is, among the four load detectors (2, 2, 2, 2), the load detector for the left front leg (2F) and the load detector for the right front leg (2F) each have a load detection A pole (56) extending higher than the sleeping area (41) of the bed (40) is attached to indicate the position of the vessel (2F). Therefore, even if both load detectors (2F, 2F) are hidden under the bed (40) when the bed (40) is installed, and it is difficult for the bed moving worker to know their positions, the bed Mobile workers can know the positions of both load detectors (2F, 2F) using the poles (5 6, 56). Therefore, by moving the bed (40) using these poles (56, 56) as a guide, the casters (42a) of each leg (42) of the bed (40) can be moved to the corresponding load detector (2). Therefore, the casters (42a) of each leg (42) of the bed (40) can be easily placed on the mounting part (3) of the corresponding load detector (2). can be placed.

[0184] In the present invention, it is desirable that the height of the bed section (41) of the pole (56) is set within a range of, for example, 100 to 8 OOmm (particularly preferably 250 to 650 mm). However, in the present invention, the height of the bed portion (41) of the pole (56) is not limited to this range.

[0185] Furthermore, a lamp (57) that lights up when the caster (42a) of the leg (42) of the bed (40) is placed on the placement part (3) is attached to the tip of the pole (56). This lamp (57) indicates that the casters (42a) of the legs (42) of the bed (40) are placed on the mounting part (3) of the load detector (2). By lighting up, you can notify the bed moving worker. At this time, the pole (56) extends higher than the sleeping area (41) of the bed (40), so that the lamp (57) at the tip of the pole (56) reaches the sleeping area of the bed (40). There is no danger that it will be hidden from view by part (41)!/. Therefore, it is possible to reliably notify the bed moving worker.

[0186] Furthermore, in each load detector (2), the upper surface of the rear frame of the base plate (50) is formed into a slope surface (50 b), so that the legs of the bed (40) ( When placing the casters (42a) of 42) on the placing part (3), the casters (42a) must pass (run) on the slope surface (50b). 42) on the mounting part (3) of the load detector (2). It can be easily mounted.

[0187] Furthermore, since the pole (56) also functions as an antenna (55) that transmits the signal output from each load detector (2) as a radio signal, each load detector (2) The transmission of signals to and from is now cordless. This ensures that the input signal lines to each load detector (2) and the output signal lines from each load detector (2) do not get in the way when the bed (40) is moved!/. Therefore, the casters (42a) of the bed (40) can be more easily placed on the placement part (3) of the load detector (2). Also, if a signal line is connected to the load detector (2) from the outside, the casters (42a) of the bed (40) will climb over this signal line, causing the signal line to break. However, in this embodiment, such a problem does not occur.

[0188] Further, each load detector (2) is equipped with its operating power supply (18), so that power supply to each load detector (2) is made cordless. As a result, the power supply lines to each load detector (2) do not get in the way when the bed (40) is moved. Therefore, the casters (42a) of the bed (40) can be more easily placed on the placement part (3) of the load detector (2). Moreover, if an external power supply line is connected to the load detector (2), the casters (42a) of the bed (40) will climb over this power supply line, causing the power supply line to become disconnected. Although there is a possibility that a problem of wire breakage may occur, such a problem does not occur in this embodiment.

[0189] Furthermore, among the four load detectors (2, 2, 2, 2), the load detector for the left front leg (2F) and the load detector for the right front leg (2F) are equipped with a Since it is equipped with a pole (56) that extends higher than (41), it has the following advantages. That is, in general, in medical institutions and nursing care facilities, certain equipment such as nurse call buttons and lighting switches are installed near the walls of the room. Therefore, the bed (40) is often installed with the front side (that is, the head side of the subject (H)) facing the wall. Additionally, since the work of moving the bed (40) is usually done by one person, when setting up the bed (40), the person working on the bed (40) must be on the back side of the bed (40) (i.e. on the foot side of subject (H)). ) Force Push and move the bed (40). Therefore, by attaching poles (56) to the load detector for the left front leg (2F) and the load detector for the right front leg (2F), it is possible to use both load detectors when setting up the bed (40) by one person. (2F, 2 Even if F) is hidden under the bed (40), the positions of both load detectors (2F, 2F) can be known through the poles (56, 56), respectively. Therefore, the casters (42a) of each leg (42) of the bed (40) can be reliably moved to the vicinity of the corresponding load detector (2), making it possible for only one person to move the bed. Even if there is, the casters (42a) of the bed (40) can be easily placed on the placement part (3) of the load detector (2).

[0190] Furthermore, since the pole (56) is expandable and retractable, the pole (56) can be retracted when the pole (56) is not needed. By doing this, when the subject (H) gets on and off the bed (41) (i.e., when landing or leaving the bed), doctors, nurses, caregivers, etc. This prevents the problem of the pole (56) getting in the way when treating, examining, testing, nursing, etc. for (H).

[0191] Furthermore, since the pole (56) is collapsible, it can be folded down when the pole (56) is not needed. By doing so, the above-mentioned problems can be reliably prevented.

[0192] Furthermore, since the pole (56) is removable, the pole (56) can be removed from the load detector (2) when the pole (56) is not needed. By doing so, the above-mentioned problems can be more reliably prevented.

[0193] Therefore, in the third embodiment, among the four load detectors (2, 2, 2, 2), the load detector for the left front leg (2F) and the load detector for the right front leg ( 2nd floor) is equipped with a pole (56) that extends higher than the sleeping area (41) of the bed (40). However, in the present invention, only one of the four load detectors (2, 2, 2, 2) is provided with such a pole (56). It is also possible for two or three load detectors to each have a pole (56) like this attached, or for all load detectors to have a pole like this (56) attached to each one. It's good to see!

[0194] Further, in the present invention, the non-contact distance sensor (4) may be an infrared distance sensor (5), or may be, for example, an ultrasonic distance sensor (6).

[0195] FIG. 14 is a perspective view showing a modified example of the load detector of the bed occupancy state detection device of the first embodiment. In addition, the load detector (2) shown in the figure is, in detail, the load detector (2F) for the left front leg of the child unit (2B) among the four load detectors.

[0196] The configuration of this load detector (2) is different from that of the load detector of the first embodiment. The main points will be explained below.

[0197] The substrate part (50) of this load detector (2) is made of, for example, an extruded material of aluminum (including its alloys; the same shall apply hereinafter), and is installed on the bed installation surface (45). It is something that

[0198] However, in the present invention, the substrate portion (50) is not limited to being formed from an extruded material, but may also be formed from, for example, a cast material or a die-cast material.

[0199] This board part (50) has a frame-like shape, such as a substantially rectangular shape in plan view, and has an opening on the inside thereof, and has a pair of left and right side frames facing each other and spaced apart from each other. (51, 51) and the both side frame portions (51, 51) are arranged facing each other at a distance from each other, and the front ends and the rear ends of the both side frame portions (51, 51) are connected to each other, respectively. It has a front and rear pair of connected front and rear frame parts (52).

[0200] In addition, on the surface (bottom surface) of the base plate (50) that is in contact with the bed installation surface (45), a plurality of (for example, three) sheet-like anti-slip members (for example, 3 pieces) are attached to the bed installation surface (4 5). (not shown) is attached with adhesive or the like. The anti-slip member can also be a piece of rubber sheet, for example.

[0201] The placing part (3) is plate-shaped and is integrally formed at the tip of the cantilever part (54).

Further, the placing part (3) is disposed substantially horizontally within the opening of the substrate part (50) so as to be able to move downward.

[0202] The placing part (3) and the cantilever part (54) are made of, for example, extruded aluminum, have a predetermined length, and are elastically bendable strain bodies. It functions as a

[0203] The base end (fixed end) of the cantilever section (54) is fixed onto the front frame section of the base plate section (50) with a plurality of fixing screws (59).

[0204] When the load detector (2) is installed on the bed installation surface (45), the upper surface force of the placement section (3) (3a) is higher than that of the bed installation surface (45). placed in a high position. Furthermore, in this state, the mounting surface (3a) is formed on a slope that is slightly downward in the running direction (R) of the casters with respect to the horizontal surface (that is, the bed installation surface (45)). The slope of this placement surface (3a), that is, the inclination angle of this placement surface (3a) with respect to the horizontal plane (bed installation surface (45)) is 0.1 to 2° (particularly preferably 0.5 to 1°). It is desirable to set it within the range of . However, in the present invention, the slope of the mounting surface (3a) is not limited to being within the above range. [0205] In this load detector (2), the left and right edges of the mounting surface (3a) of the mounting section (3) are provided with a guard against the fall of the caster (42a) from above the mounting section (3). The force of the pair of left and right caster fall prevention walls (3b, 3b), which are arranged approximately opposite each other, to prevent the casters from falling in the opposite direction to the running direction (R). , the distance between the casters gradually narrows in the running direction (R) of the casters), and is integrally provided in a rising shape with respect to the mounting surface (3a) of the mounting section (3). Further, the caster fall prevention walls (3b, 3b) extend straight along both left and right edges of the mounting section (3) and are provided on the mounting surface (3a).

[0206] The running direction (R) of the casters refers to the running direction of the casters (42a) when the casters (42a) are placed from the bed installation surface (45) onto the placement part (3)! cormorant. The same applies below.

[0207] Furthermore, at the front end of the mounting surface (3a) of the mounting section (3), there is a regular load detection position (specifically, a regular load detection area) on the mounting surface (3a) (S). The stopper wall (3c) force stops the caster (42a) from moving when it reaches the stopper wall (3c). The cross-sectional shape of the wall surface of this stop flange wall portion (3c) is approximately arcuate.

[0208] Both caster fall prevention walls (3b, 3b) and the stopper wall (3c) are arranged in a substantially U-shape (U-shape) in plan view. Further, the space between the rear ends of both caster fall prevention walls (3b, 3b) above the leading edge of the mounting surface (3a) is defined as a caster inlet.

[0209] The distance between the front ends of both caster fall prevention walls (3b, 3b) is set to, for example, 70~: LOOmm. On the other hand, the distance between the rear ends of both caster fall prevention walls (3b, 3b) is set to, for example, 20 to 200 mm.

[0210] The slope of the slope surface (50b) of the upper surface of the rear frame portion (52) of the base plate portion (50), that is, the angle of inclination of the slope surface (50b) with respect to the bed installation surface (45) is 10° or less (particularly preferably It is desirable that the angle is set within a range of 5° or less. However, in the present invention, the slope of the slope surface (50b) is not limited to being within the above range.

[0211] Further, on the left and right edges of the slope surface (50b), there are a pair of left and right wheels that guide the casters (42a) from the bed installation surface (45) to the top of the mounting section (3). The caster guide walls (50c, 50c) are in a state in which the distance between them gradually narrows in the direction of caster travel (R) (in other words, the distance between them gradually becomes wider in the opposite direction to the direction of travel of the casters (R)). ), and the front ends of both caster guide walls (50c, 50c) are connected to both caster fall prevention walls (3 b, 3b), and is integrally provided in a rising shape with respect to the slope surface (50b). Furthermore, in this embodiment, these two caster guide walls (50c, 50c) are connected to an imaginary line extending forward along both caster fall prevention walls (3b, 3b) in a plan view (in detail, an imaginary line) Provided on a straight line)! /, Ru.

[0212] In addition, the distal end edge of the placing surface (3a) of the placing part (3) has a cross section that is approximately mountain-shaped (mountain-shaped) or approximately inverted V-shaped (inverted V-shaped) that the casters (42a) can ride over. A protruding strip (3d) in the shape of a letter is integrally provided along the tip edge. The caster (42a) is configured to ride over the protruding portion (3d) so that the caster (42a) is placed at the proper load detection position (S) on the placement surface (3a). There is.

[0213] It is desirable that the height of the protrusion of the protruding strip (3d) on the mounting surface (3a) is set within a range of 2 to 6 mm. However, in the present invention, the protruding height of the protruding portion (3d) is not limited to being within the above range.

[0214] This protruding portion (3d) also plays the role of a beam to suppress the radial bending of the placing portion (3), thereby improving the load detection accuracy and further , it becomes possible to reduce the thickness of the mounting part (3), thereby making it possible to reduce the weight of the load detector (2).

[0215] The strain detection sensor (9) is one or more strain gauges (9a) mounted on the top surface of the cantilever section (54). In this modification, the number of strain gauges (9a) is four. These four strain gauges (9a) are electrically connected to each other to form a bridge circuit (more specifically, a Whitstone bridge circuit). The output signal from this bridge circuit is then transmitted to the control means (10) mounted on the load detector (2) as an output signal from the strain detection sensor (9).

[0216] The other configuration of this load detector (2) is the same as the load detector of the first embodiment.

[0217] Therefore, this bed load detector (2) has the following advantages.

[0218] That is, in this load detector (2), a pair of left and right caster fall prevention walls (3b, 3b) are provided on both left and right edges of the mounting surface (3a) of the mounting section (3). Therefore, when placing the casters (42a) of each leg (42) of the bed (40) from the bed installation surface (45) onto the placing part (3), (3) Falling from above can be prevented by both caster fall prevention walls (3b, 3b). [0219] Furthermore, both caster fall prevention walls (3b, 3b) are arranged such that the distance between them becomes wider in the opposite direction to the running direction (R) of the casters. Therefore, when placing the casters (42a) from the bed installation surface (45) onto the placing part (3), the casters (42a) must be placed on both the caster fall prevention walls (3b, 3) on the placing part (3). 3b), thereby making it easier to place the casters (42a). Moreover, even if the casters (42a) come into contact with the caster fall prevention wall (3b) during the operation of placing the casters (42a) on the placement part (3), the stopper wall The casters (42a) can be guided along the caster fall prevention wall (3b) in the direction toward the part (3c).

[0220] Furthermore, the caster (42a) that has reached the regular load detection position (area) (S) on the mounting surface (3a) is shown at the front end of the mounting surface (3a) of the mounting section (3). Since the stopper wall (3c) is provided to stop the caster from moving, the caster (42a) can be reliably placed at the proper load detection position (S) on the placement surface (3a). Therefore, it is possible to prevent the load detection accuracy from decreasing due to the caster (42a) being placed on the placement surface (3a) at a position deviated from the regular load detection position (S).

[0221] Further, the mounting surface (3a) of the mounting portion (3) is formed on a slope with a downward slope in the running direction (R) of the casters. Therefore, when the casters (42a) are placed on this placement surface (3a), the casters (42a) move toward the stopper wall (3c) due to the action of gravity and move toward the stopper wall (3c). It comes into contact with (contact). Therefore, the casters (42a) can be reliably placed at the regular load detection position (S) on the placement surface (3a).

[0222] Furthermore, this load detector (2) has a slope surface (50b) with an upward slope in the running direction (R) of the casters. Therefore, the force required to place the casters (42a) from the bed installation surface (45) onto the placing part (3) can be reduced, thereby making it easier to place the casters (42a). can.

[0223] Furthermore, a pair of left and right caster guide walls (50c, 50c) are arranged on the left and right edges of the slope surface (50b) so that the distance between them becomes narrow in the running direction (R) of the casters, and The front end portions of both caster guide wall portions (50c, 50c) are arranged at positions corresponding to the rear end portions of both caster fall prevention wall portions (3b, 3b). Therefore, even if the casters (42a) come into contact with the caster guide wall (50c) when the casters (42a) travel on the slope surface (50b), the casters (42a) may (50c) towards the top of the mounting section (3) Since the casters (42a) are guided in the same direction, the work of placing the casters (42a) can be performed more easily.

[0224] Furthermore, a protruding strip (3d) is provided along the distal edge of the mounting surface (3a) of the mounting portion (3), and the caster (42a) is attached to the protruding strip. The caster (42a) is configured to be placed at a regular load detection position (S) on the placement surface (3a) by climbing over the portion (3d). Therefore, the casters (42a) can be reliably placed at the proper load detection position (S) on the placement surface (3a). Further, the protruding portion (3d) can prevent the caster (42a) placed on the placement surface (3a) from accidentally falling due to the force of the tip edge of the placement surface (3a).

[0225] Furthermore, this protruding portion (3d) also plays the role of a beam to suppress the radial curvature of the mounting portion (3), thereby improving the load detection accuracy. Furthermore, it becomes possible to reduce the thickness of the mounting portion (3).

[0226] Further, in the present invention, the non-contact distance sensor (4) may be an infrared distance sensor (5), or may be, for example, an ultrasonic distance sensor (6).

[0227] FIGS. 15 and 16 are diagrams showing another modification of the load detector of the bed occupancy state detection device of the first embodiment. Note that the non-contact distance sensor (4) is not shown.

[0228] The configuration of this load detector (2) will be described below, focusing on its differences from the load detector of the first embodiment.

[0229] The mounting surface of the mounting portion (3) of the load detector (2) is recessed with an arcuate cross section.

[0230] Furthermore, the surface (60) (bottom surface) of the load detector (2) that is in contact with the bed installation surface (45) has rigidity. Furthermore, a recess (61) having a rectangular shape when viewed from the bottom is provided at a plurality of locations (e.g., 3 locations) surrounding the position immediately below the placing portion (3) on the ground contact surface (60). Ru. Further, the surface of this ground contact surface (60) other than the recessed portion (61) is formed flat.

[0231] Furthermore, as shown in Fig. 15, inside each recess (61), a rubber sheet is provided with an anti-slip member (62) having elasticity that protrudes below the ground contact surface (60). It is located in the state. In this modification, the anti-slip member (62) is disposed within the recess (61) and is fixed to the approximate center (center) of the top surface (61a) of the recess (61) with an adhesive or the like.

[0232] The anti-slip member (62) is made of rubber such as natural rubber or silicone rubber, and has a rectangular shape when viewed from the bottom. It also takes a piece of rubber sheet.

[0233] Then, as shown in Figure 15, the load detector (2) is installed on the bed installation surface (45), and the load detector (2) is placed on the bed (40) on the placement part (3). If the legs (42) (more specifically, the casters (42a)) are placed on the floor, the ground contact surface (60) is supported by the anti-slip member (62), thereby preventing the floor from contacting the ground. The surface (60) is configured to be slightly spaced upward from the bed installation surface (45). In this state, it is desirable that the gap between the ground contact surface (60) and the bed installation surface (45) be set within a range of, for example, 0.2 to 2 mm. However, in the present invention, this gap is not limited to being within the above range.

[0234] Furthermore, as shown in Fig. 16, the load detector (2) is placed on the bed (40) on the bed (3) while it is installed on the bed installation surface (45). When the leg (42) (more specifically, its caster (42a)) is placed, the anti-slip member (62) collapses into the recess (61) due to the force of the leg (42) of the bed (40). ) is vertically compressed between the top surface (61a) and the bed installation surface (45) and its thickness becomes thinner, resulting in the contact surface (60) coming into contact with the bed installation surface (45) (details). In other words, it is configured to perform pressure welding.

[0235] The size of the anti-slip member (62) is, for example, length 10 to 40 mm (details: 28 mm, etc.), width 5 to 30 mm (details: 8 mm, etc.), thickness 0.5 to 6 mm (details: 8 mm, etc.). It is desirable to set it within a range of 2mm, etc.). However, in the present invention, the size of the anti-slip member (62) is not limited to being within the above range.

[0236] The size of the recess (61) is, for example, a length of 12 to 42 mm (in detail, 30 mm, etc.), a width of 7 to 32 mm (in detail, 10 mm, etc.), and a depth of 0.3 to 4 mm (in detail, 30 mm, etc.). It is desirable to set it within a range of 1.8 mm, etc.). However, in the present invention, the size of the recess (61) is not limited to being within the above range.

[0237] Furthermore, the size of the recess (61) is such that the anti-slip member (62) is compressed between the top surface (61a) of the recess (61) and the bed installation surface (45), as shown in Figure 16. The size is set such that the entire non-slip member (62) can be accommodated in the closed state.

[0238] This load detector (2) has the following advantages.

[0239] That is, this load detector (2) has an elastic non-slip member (62) in contact with the recess (61) provided in the surface (60) that is in contact with the bed installation surface (45). Extrudes below the floor (60) The legs (42) of the bed (40) are placed on the placement part (3) while the bed is placed on the bed installation surface (45). In this case, the floor contact surface (60) is supported by a non-slip member (62), and the floor contact surface (60) is configured to be spaced upward from the bed installation surface (45). Therefore, when placing the legs (42) (casters (42a)) of the bed (40) on the placement part (3) of the load detector (2), if the legs (42) (casters (42a)) of the bed (40) 42) is applied to the load detector (2) with its lateral force, the anti-slip member (62) prevents the load detector (2) from slipping on the bed installation surface (45). can do. Therefore, the leg portion (42) of the bed (40) can be easily placed on the placement portion (3) of the load detector (2).

[0240] Further, in this load detector (2), when the legs (42) of the bed (40) are placed on the placement part (3), the anti-slip member (62) The legs (42) of 40) are compressed between the top surface (61a) of the recess (61) and the bed installation surface (45) due to the force, and the contact surface (60) is pressed against the bed installation surface (45). are configured to abut. Therefore, it is possible to prevent the load detection accuracy from decreasing due to the influence of the anti-slip member (62). Furthermore, since the pressing force of the non-slip member (62) against the bed installation surface (45) due to the load of the legs (42) of the bed (40) is reduced, the non-slip member (62) is made of rubber. Even in this case, sticking of the anti-slip member (62) to the bed installation surface (45) can be suppressed. Therefore, the load detector (2) can be easily removed from the bed installation surface (4 5).

[0241] Furthermore, recesses (61) are provided at multiple locations surrounding the position immediately below the mounting portion (3) on the ground surface (60) of the load detector (2), and each recess (61) ) is provided with an anti-slip member (62). Therefore, with the legs (42) of the bed (40) placed on the placement part (3) of the load detector (2), the stability of the load detector (2) is improved.

[0242] Furthermore, the size of the recess (61) is such that the non-slip member (62) is compressed between the top surface (61a) of the recess (61) and the bed installation surface (45). (62)It is set to a size that can accommodate the entire building. Therefore, when the anti-slip member (62) is compressed, the anti-slip member (62) is reliably accommodated in the recess (61). As a result, when the legs (42) of the bed (40) are placed on the placement part (3) of the load detector (2), the contact surface of the load detector (2) ( 60) can be reliably brought into contact with the bed installation surface (45). [0243] Furthermore, since the anti-slip member (62) is made of rubber, it can be obtained at low cost. Therefore, the manufacturing cost of the load detector (2) can be reduced.

[0244] Therefore, in this modification, the legs (42) of the bed (40) are provided with casters (42a). Casters (42a) may not necessarily be provided.

[0245] Further, in the present invention, the non-contact distance sensor (4) may be an infrared distance sensor (5), or may be, for example, an ultrasonic distance sensor (6).

[0246] Although several embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to what is shown in the above embodiments and can be modified in various ways.

[0247] This application is filed in Japanese Patent Application No. 2005-3614 No. 62 filed on December 15, 2005, and Japanese Patent Application No. 2005-351867 filed on December 6, 2005. , claims priority to Japanese Patent Application No. 2005-371482 filed on December 26, 2005, and Japanese Patent Application No. 2005-367633 filed on December 21, 2005. The disclosure content thereof constitutes a part of the present application as is.

[0248] The terms and expressions used herein are for descriptive purposes only and are not to be interpreted as limiting. It must be recognized that this does not exclude equivalents, but also allows various modifications within the claimed scope of this invention.

[0249] Although this invention may be embodied in many different forms, this disclosure is to be considered as providing examples of the principles of the invention, which embodiments include: A number of illustrated embodiments have been described herein, with the understanding that the invention is not intended to be limited to the preferred embodiments described and illustrated.

[0250] The present invention is not limited to the various preferred embodiments described herein, but is based on this disclosure. Any and all embodiments having equivalent elements, modifications, deletions, combinations (e.g., combinations of features across various embodiments), improvements and changes that may be recognized by a person skilled in the art. It also includes the state of affairs. Claim limitations should be interpreted broadly based on the terms used in the claims and should not be limited to the examples set forth herein or in the proceedings of this application. Examples should be construed as non-exclusive. For example, in this disclosure, the term "preferably" is non-exclusive and means "preferably, but not limited to." In this disclosure and in the prosecution of this application, a means 'plus' function is a step or a 'step for' limitation is clearly stated as a) 'means for' or 'step for' with respect to a particular claim limitation. and b) the corresponding functionality is clearly stated, and c) the structure, materials, or acts that support its construction are mentioned, and all of the conditions for which the limitation applies are: Applicable only if present in the matter. Throughout this disclosure and the prosecution of this application, the terms "present invention" or "invention" may be used to refer to one or more aspects within the scope of this disclosure. The terms present invention or invention should not be improperly construed as identifying criticality, but should not be improperly construed as applying to all aspects or embodiments. (i.e., the invention is to be understood to have many aspects and embodiments) and should not be improperly construed to limit the scope of the present application or claims. In this disclosure and in the proceedings of this application, the term "embodiment" is also used to describe any aspect, feature, process or step, any combination thereof, and Z or any part thereof. It's annoying. In some examples, various embodiments may include overlapping features. Throughout this disclosure and the proceedings of this application, the abbreviations "eg," and "NB" may be used to mean "for example" and "note," respectively.

Industrial applicability

The present invention is used, for example, in medical institutions, nursing care facilities, general homes, etc., and can be used to monitor the subject's arrival on the bed, leaving the bed, position on the bed, intensity of body movements, type of body movements, etc. It can be used for a bed occupancy detection device that detects the situation, and a method for installing a bed load detector used in the device.

Claims

The scope of the claims

[1] A bed having a plurality of legs includes a plurality of load detectors each having a mounting portion on which each leg of the bed is placed;

[2] The bed occupancy status detection device according to claim 1, wherein the distance sensor is mounted on the base unit.

[3] The distance sensor is an infrared distance sensor mounted on the base unit,

The infrared distance sensor emits infrared rays from a light projecting section mounted on the base device toward a reflecting section mounted on the corresponding slave device, and directs the reflected infrared rays from the reflecting section to the base device. 2. The bed occupancy status detection device according to claim 1, which measures the distance by receiving light with a light receiving section mounted on the bed.

[4] The distance sensor is an ultrasonic distance sensor mounted on the base unit,

The ultrasonic distance sensor transmits ultrasonic waves from a transmitter mounted on the parent unit to a reflecting unit mounted on the corresponding slave unit, and transmits reflected ultrasonic waves from the reflector to the parent unit. 2. The bed occupancy status detection device according to claim 1, wherein the device measures the distance by receiving data with a receiving unit mounted on the bed.

[5] The bed occupancy status detection device according to claim 1, wherein the distance sensor is highly directional.

[6] A terminal for inputting the pitch of the bed legs,

Comparison means for comparing the pitch input to the terminal and the distance measured by the distance sensor; 2. The bed occupancy status detection device according to claim 1, further comprising: a notification device that issues a notification signal based on a comparison result of the comparison device.

[7] Storage means for storing the distance between the parent unit and each slave unit corresponding to each of the plurality of bed types;

A terminal to enter the type of bed,

2. The bed occupancy status detection device according to claim 1, further comprising: a notification device that issues a notification signal based on a comparison result of the comparison device.

[8] The bed occupancy status detection device according to claim 6 or 7, further comprising display means for displaying the comparison result of the comparison means.

[9] At least one of the plurality of load detectors is provided with a pole extending higher than the sleeping area of the bed and indicating the position of the load detector!Claim 1. Bed status detection device described in .

[10] The bed occupancy status detection device according to claim 9, wherein a lamp that lights up when a leg of the bed is placed on the placement part is provided at the tip of the pole.

[11] Casters for moving the bed are provided at the lower end of each leg of the bed,

The load detector has a slope surface having an upward slope in a direction in which the bed installation surface force, which is passed when the casters of the bed are placed on the placement part, also advances onto the placement part. 10. The bed status detection device according to claim 9.

[12] The bed occupancy status detection device according to claim 9, wherein the pole also functions as an antenna that transmits the signal output from the load detector as a radio signal.

[13] The bed occupancy status detection device according to claim 9, wherein the load detector is equipped with an operating power source.

[14] The bed has a left front leg, a right front leg, a left rear leg, and a right rear leg as the plurality of legs,

Among the plurality of load detectors, the load applied to the left front leg and right front leg of the bed 10. The bed occupancy status detection device according to claim 9, wherein the pole is attached to each of the left front leg load detector and the right front leg load detector that respectively detect the weight of the bed.

[15] The bed presence detection device according to claim 9, wherein the pole is extendable and retractable.

[16] The bed occupancy status detection device according to claim 9, wherein the pole is of a collapsible type.

[17] The bed occupancy status detection device according to claim 9, wherein the pole is removable from the load detector.

[18] When installed on the bed installation surface, the multiple legs of the bed correspond to each other. In the installation method of the bed load detector,

Install the base unit on the bed installation surface,

Next, installing a bed load detector, which measures the distance between the base unit and each slave unit using a non-contact distance sensor when each slave unit is installed on the bed installation surface. Method.

[19] The bed load detector installation method according to claim 18, wherein the distance sensor is mounted on the base device.

[20] The distance sensor is an infrared distance sensor mounted on the base unit,

The distance measurement by the infrared distance sensor includes: emitting infrared rays from a light projecting section mounted on the base device toward a reflecting section mounted on the corresponding slave device; and emitting infrared rays reflected from the reflecting section. 20. The bed load detector installation method according to claim 18, wherein the method is performed by receiving light with a light receiving section mounted on the base unit.

[21] The distance sensor is an ultrasonic distance sensor mounted on the base unit,

Distance measurement by the ultrasonic distance sensor includes: transmitting ultrasonic waves from a transmitter mounted on the base unit toward a reflecting unit mounted on the corresponding slave unit, and receiving reflected ultrasonic waves from the reflecting unit. 20. The bed load detector installation method according to claim 18, wherein the bed load detector is received by a receiving unit mounted on the base device.

[22] The bed load detector according to claim 18, wherein the distance sensor is highly directional. Installation method.

[23] Using a notification means that issues a notification signal to the installation worker when the distance measured by the distance sensor is equal to a preset distance,

20. The bed load detector installation method according to claim 18, wherein the installation position of the slave device is determined based on a notification signal emitted by the notification means.

[24] using a display means that displays the distance measured by the distance sensor or the amount of deviation of the measured distance from a preset distance;

20. The bed load detector installation method according to claim 18, wherein the installation position of the child unit is determined based on the display by the display means.

[25] A notification means that emits a sound as a notification signal to an installation worker by changing the tone in stages depending on whether the distance measured by the distance sensor approaches or moves away from a preset distance. use,

19. The bed load detector installation method according to claim 18, wherein the installation position of the child unit is determined based on the sound emitted by the notification means.