JPH109976A - Load detection mechanism and bed detection device - Google Patents

Abstract

(57) [Summary] A load detecting mechanism capable of responding to a change in the initial value of a compressive load with a mechanical structure and capable of reliably detecting that the compressive load has reached a set value. When,
An on-bed detection device configured using the load detection mechanism is provided. A load detection mechanism according to the present invention detects that an applied compressive load has exceeded a default value and has reached a set value, and can relatively move along a direction in which the compressive load is applied. The vehicle includes an inner shaft member 1 and an outer shaft member 2, and a detecting means 3 interposed between the shaft members 1 and 2 and detecting that the compression load has reached a set value. Also,
The on-bed detection device according to the present invention includes a load detection mechanism 21 incorporated in a support 23 of a bed 22 and a load detection mechanism 21.
And a transmitting unit 25 for transmitting the confirmation result output from the confirming unit 24 to confirm that the compression load has reached the set value when a detection signal is output from the unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load detecting mechanism and an on-bed detecting device, and more particularly, to a load detecting mechanism for detecting that an applied compressive load has reached a set value beyond an initial value. The present invention relates to a bed detection device configured using a load detection mechanism.

[0002]

2. Description of the Related Art Conventionally, in accommodation facilities such as hospitals and hotels used by a large number of people, for example, in hospitals, whether patients are present on beds placed in respective hospital rooms or not.
In particular, at night, it is necessary to know whether the inpatient is sleeping on the bed or has left the bed, and nurses are watching around the bed. However,
Since it is impossible to continuously look around the bed of all the inpatients, a load detecting mechanism for detecting the applied compressive load is provided inside the bed frame, as disclosed in JP-A-6-125828. The in-bed detection device is incorporated into the device, and the in-patient is detected by determining whether or not the compression load indicated by the detection signal from the load detection mechanism has increased to the weight of the person. It is intended to ascertain whether or not it is.

[0003]

As the load detecting mechanism according to the above-mentioned prior art, there is a load detecting mechanism which uses a sliding resistor or a load cell which outputs a change over time of the compression load as a detection signal. General. for that reason,
In an on-bed detection device configured using such a load detection mechanism, it is necessary to determine whether or not a detection signal output from detection means such as a sliding resistor indicates a compression load commensurate with the weight of a person. The compression load indicated by the detection signal from the detection means is compared with a separately specified reference value, and if the compression load exceeds the reference value, it is determined that a person is present on the bed. This requires a determination unit having a function, that is, a signal processing circuit configured using various electronic components and the like.

Further, on a bed in which a load detection mechanism constituting a bed detection device is incorporated, beddings having different weights are placed according to the season, and personal items such as trunks of hospitalized patients are placed. May be placed, but in order to make a reliable determination of whether or not a person is present, it is necessary to take into account the weight change caused by placing bedding and personal belongings. You need to reset the value again,
There is also a disadvantage that these operations require troublesome work.

The present invention has been made in view of these inconveniences, and can cope with a change in the initial value of the compression load with a mechanical structure, and the compression load has reached a set value. It is an object of the present invention to provide a load detection mechanism capable of reliably detecting the above-mentioned situation, and a bed detection device configured using the load detection mechanism.

[0006]

SUMMARY OF THE INVENTION A load detecting mechanism according to the present invention detects that an applied compressive load has reached a set value beyond an initial value. An inner shaft member and an outer shaft member which can be relatively moved,
Detecting means is provided between these two shaft members to detect that the compression load has reached a set value. According to the present invention, one of the inner shaft member and the outer shaft member is displaced with respect to the other as the initial value of the compressive load is applied, and the shaft member is further applied with the application of the further compressive load. Will continue to be displaced, and that the shaft member has been displaced until it reaches the set value of the compressive load will be detected by the detecting means.

An on-bed detection device according to the present invention detects whether or not a person is present on a bed, and detects a load detection mechanism incorporated in a frame of the bed and a load detection mechanism. When a signal is output, a confirmation unit for confirming that the compression load has reached a set value, and a transmission unit for transmitting a confirmation result output from the confirmation unit are provided. According to the present invention, since the load detection mechanism itself detects that the compression load has reached the set value due to the presence of a person on the bed, the confirmation means determines the presence of the person. There is no necessity, and it is only necessary to have a function of confirming, and an extremely simple configuration is sufficient. In addition, centralized management via transmission means can be performed.

[0008]

DETAILED DESCRIPTION OF THE INVENTION A load detecting mechanism according to a first aspect of the present invention is a load detecting mechanism for detecting that an applied compressive load has reached a set value beyond an initial value. An inner shaft member and an outer shaft member that are relatively movable along the application direction of the shaft member, and a detection unit that is interposed between these shaft members and detects that the compression load has reached a set value. I have.

According to a second aspect of the present invention, the detecting means in the load detecting mechanism according to the first aspect outputs a detection signal by detecting a sensor dog that relatively moves in response to application of a compressive load and an end of operation of the sensor dog. And a detection sensor that performs the detection.

According to a third aspect of the present invention, the load detecting mechanism according to the second aspect includes an intermediate shaft member interposed between the inner shaft member and the outer shaft member.
While either the inner shaft member or the outer shaft member is supported so as to be displaceable and restrainable with one of the sensor dog and the detection sensor, the other of the inner shaft member or the outer shaft member is , A sensor dog or the other of the detection sensors is provided.

According to a fourth aspect of the present invention, in the load detecting mechanism according to the third aspect, either one of the sensor dog or the detection sensor is provided on one of the inner shaft member and the outer shaft member via an intermediate shaft member. A position regulating member is provided to make one face the other, and an initial height of one of the sensor dog and the detection sensor relative to the other is set between one of the sensor dog and the detection sensor and the position regulating member. A height setting member is provided.

According to a fifth aspect of the present invention, in the load detecting mechanism according to the fourth aspect, the height setting member is a coil spring externally fitted to the intermediate shaft member, and the coil spring is either a sensor dog or a detection sensor. It has a free length in which one is positioned at an initial height facing the other.

According to the load detecting mechanisms of the first to fifth aspects, one of the inner shaft member and the outer shaft member is moved to the other as the initial value of the compression load is applied. In contrast, the shaft member continues to be displaced with the application of a further compressive load, and the displacement is detected by the detecting means until the shaft member reaches the set value of the compressive load. Become.

According to a sixth aspect of the present invention, an on-bed detection device detects whether or not a person is present on a bed, and is incorporated in a frame of the bed.
A load detecting mechanism according to any one of claims 5 to 6, a checking means for checking that the compression load has reached a set value when a detection signal is output from the load detecting mechanism, and a checking result output from the checking means. And transmission means for transmitting the information.

According to a seventh aspect of the present invention, in the occupancy detecting device according to the sixth aspect, the confirmation means outputs a confirmation result by a digital signal, and the transmission means uses a telephone line or a dedicated digital line. It is characterized by being constituted.

According to an eighth aspect of the present invention, the confirmation means in the on-bed detection device according to the sixth aspect outputs a confirmation result by a digital signal, and the transmission means is installed in a frame of the bed. It is characterized by comprising an electromagnetic wave transmitter and an electromagnetic wave receiver installed outside the frame of the bed.

According to the present invention, the load detecting mechanism detects that the compression load has reached the set value in accordance with the presence of a person on the bed. Since the detection is performed by itself, the determination means only needs to have an extremely simple configuration, and it is also possible to perform intensive management via the transmission means.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a longitudinal sectional view showing a configuration of a load detecting mechanism according to the present embodiment, FIG. 2 is a transverse sectional view taken along line AA in FIG. 1, and FIG. 1 is a cross-sectional view along the line BB in FIG. 1, and FIG. 4 is a cross-sectional view along the line CC in FIG.

This load detecting mechanism detects that the applied compressive load has exceeded the initial value and has reached the set value. The load detecting mechanism is arranged on the same axis and applies the compressive load. An inner shaft member 1 and an outer shaft member 2 which are relatively movable along a direction, and a detecting means 3 interposed between these two shaft members 1 and 2 for detecting that a compressive load has reached a set value.
And an intermediate shaft member 4 interposed between the inner shaft member 1 and the outer shaft member 2 like the detecting means 3. In the following description, it is assumed that the compressive load is applied along the vertical direction. However, even when the compressive load is applied along the horizontal direction or the diagonal direction, the present embodiment is not limited to this. Of course, such a load detection mechanism can be used.

Here, the inner shaft member 1 is fixedly positioned and supported, and the outer shaft member 2 moves downward, that is, moves downward with the application of a compressive load along the vertical direction. On the other hand, the detecting means 3 includes a sensor dog 5 which relatively moves with the application of a compressive load, and a detection sensor 6 such as a photocoupler which detects the end of operation of the sensor dog 5 and outputs a detection signal. The intermediate shaft member 4 has a long round bar shape having a required length, and a flat plate-shaped sensor dog 5 is disposed at an upper end thereof. At this time, the sensor dog 5 is formed with a detection opening 5a whose passage is detected by the detection sensor 6, and the height of the detection opening 5a is determined by the compression load to be detected. It is determined corresponding to the set value. Here, it goes without saying that the detection sensor 6 may use a limit switch or a magnetic field change.

The inner shaft member 1 is connected to a caster provided at the lower part of a column constituting the bed, or is fixed by being mounted on the floor. A long rod-shaped shaft body 9 having a required length and erected on the axial center position of the inner block body 8, and a lower end of the shaft body 9 from below with respect to the inner block body 8. It is fixed by screwing. A detection sensor 6 constituting the detection means 3 is fixed to the upper end of the shaft body 9 with a screw via a support tool 10, while a block piece 11 is provided in a middle part along the longitudinal direction. As shown in FIG. 2, a through hole 11 a through which the intermediate shaft member 4 supported by the outer shaft member 2 and capable of being vertically displaced and restrained by the outer shaft member 2 is inserted. An opening 11b through which the lower end of the sensor dog 5 disposed on the intermediate shaft member 4 is inserted is formed. In addition, the support tool 10 here may be capable of changing the position using a long hole or the like. In such a configuration, the height position of the detection sensor 6 is changed. This has the advantage that the set value of the compression load to be detected can be changed.

At this time, between the sensor dog 5 disposed at the upper end of the intermediate shaft member 4 and the block piece 11,
A coil spring 12 having a compressive force of about Kgf is externally fitted to the intermediate shaft member 4 and interposed therebetween.
The free length of the coil spring 12 when no compressive load is applied is such that the sensor dog 5 is positioned at an initial height facing the detection sensor 6. In addition,
Reference numeral 13 in FIG. 1 denotes a washer.
Is provided to prevent the intermediate shaft member 4 from coming off.

That is, the block piece 11 here restricts the insertion position of the intermediate shaft member 4 and the sensor dog 5 in the horizontal direction with respect to the shaft body 9, and as a result, the detection sensor disposed at the upper end of the shaft body 9. 6 functions as a position regulating member that faces the sensor dog 5 and
The coil spring 12 functions as a height setting member for causing the initial height of the sensor dog 5 to face the detection sensor 6. As a result of adopting such a configuration, as shown in FIG. 3, the sensor dog 5 provided on the intermediate shaft member 4 has the light emitting element 6 a of the photocoupler, which is the detection sensor 6 provided on the shaft 9, and Since the light-receiving elements 6b are inserted between the light-receiving elements 6b, the detection by the detection sensor 6 accompanying the passage of the opening 5a of the sensor dog 5 is performed.

The outer shaft member 2 includes a cylindrical body 14 fitted externally to the inner shaft member 1 and a short round bar-shaped outer block body 15 fixed to the lower end of the cylindrical body 14 with screws. The outer block body 15 externally fitted to the shaft body 9 of the inner shaft member 1 via the bush 16
The through hole 1 through which the lower end of the intermediate shaft member 4 whose position is regulated by the block piece 11 provided in the inner shaft member 1 is inserted.
5a, that is, a through hole 15a for supporting the intermediate shaft member 4 with the outer shaft member 2 so as to be vertically displaceable and restrainable.
Are formed after alignment. Then, the outer block body 15 and the inner block body 8 of the inner shaft member 1 are formed.
Between the lower shaft member 2 and the inner shaft member 1
The coil spring 17 to receive is 40Kgf
It has a degree of compressive force and is interposed. The two block members 8 and 15 have a fitting structure that allows the outer shaft member 2 to smoothly move down in the vertical direction, and between the opposing surfaces of the two block members 8 and 15. Are secured so as not to hinder the lowering operation of the outer shaft member 2.

In this case, notches 14a and 15b as shown in FIG. 4 are formed in each of the cylindrical body 14 and the outer block body 15, while the notches 15b of the outer block body 15 are formed. Is provided with a restraining piece 18 for restraining the intermediate shaft member 4 by sandwiching the through hole 15a and the interrupting portion 15c, and the restraining piece 18 is penetrated by a fastening tool such as a fastening screw 19 or a lever. The lower end of the intermediate shaft member 4 inserted through the hole 15a is restrained. When the lower end of the intermediate shaft member 4 is constrained by such means, the position of the intermediate shaft member 4 in the vertical direction is specified, and the height position of the sensor dog 5 with respect to the detection sensor 6 is specified. Would be.

Next, the operation of the load detecting mechanism according to this embodiment will be described.

In this load detecting mechanism, a set value for detecting the opening height of the detecting opening 5a of the sensor dog 5 provided in the intermediate shaft member 4, for example, when the compression load is 10 kg.
In the case of f, the opening height corresponding to the compressive load of 10 kgf is set, and the outer block member 15 provided with the outer shaft member 2 that moves downward in response to the application of the compressive load.
Of the intermediate shaft member 4 is released in advance. Here, the opening height of the detection opening 5a is fixed, and the size of the sensor dog 5 is adjusted to change the position of the detection opening 5a with respect to the intermediate shaft member 4, thereby setting the compression load. Is also changed.

Therefore, when an initial value of the compressive load, for example, an initial value of 1 kgf is applied to the outer shaft member 2 under such a state, the outer shaft member 2 becomes the initial value of the applied compressive load. In this case, since the intermediate shaft member 4 is supported by the block piece 11 of the inner shaft member 1 fixed via the coil spring 12, the lowering operation of the outer shaft member 2 is performed. Irrespective of the above, the sensor dog 5 maintains the height position facing the detection sensor 6. In addition, as long as the restraint of the intermediate shaft member 4 is released, the positional relationship between the sensor dog 5 and the detection sensor 6 is maintained even if the initial value of the compression load is, for example, 2 kgf. In other words, in this load detection mechanism, the initial value of the compression load can be arbitrarily changed by releasing the constraint of the intermediate shaft member 4, so that a so-called reset operation can be easily performed.

Further, after the lower end of the intermediate shaft member 4 is restrained by the outer block 15 provided on the outer shaft member 2 which has moved downward in accordance with the initial value of the compression load, the compression load is applied. As a result, when the outer shaft member 2 moves downward, the intermediate shaft member 4 whose lower end is restrained by the outer shaft member 2 also moves downward against the coil spring 12 together with the outer shaft member 2. Then, when the compression load applied to the outer shaft member 2 after the application of the initial value reaches the set value of 10 kgf, the detection opening 5a of the sensor dog 5 disposed on the intermediate shaft member 4 becomes the detection sensor. 6, and the detection sensor 6 detects that the compression load has reached the set value. That is, in this load detecting mechanism, the outer shaft member 2 is displaced with respect to the inner shaft member 1 as the initial value of the compressive load is applied, and the outer shaft member 2 is displaced with the application of the further compressive load. The displacement of the sensor dog 5 accompanying the displacement of the outer shaft member 2 is detected by the detection sensor 6 constituting the detection means 3.
As a result, it is detected that the compression load has reached the set value.

In the above description, the load detecting mechanism according to the present embodiment includes the inner shaft member 1, the outer shaft member 2, the detecting means 3, and the intermediate shaft member 4, and the outer shaft member 2 Is moved, but it is a matter of course that the present invention is not limited to such a configuration, and the outer shaft member 2 may be fixedly supported while the inner shaft member 1 moves. The intermediate shaft member 4 may be supported by the inner shaft member 1 so as to be displaceable and restrainable. Further, in the present embodiment, the sensor dog 5 of the detecting means 3 is arranged on the intermediate shaft member 4 and the detection sensor 6 is arranged on the inner shaft member 1. 5 while the intermediate shaft member 4
It is also possible to dispose the detection sensor 6 in advance. Further, the load detecting mechanism does not include the intermediate shaft member 4, and the sensor dog 5 and the detection sensor 6 are directly disposed on the inner shaft member 1 and the outer shaft member 2, respectively. It is also possible.

Subsequently, the presence detection device according to the present embodiment will be described.

(Embodiment 2) FIG. 5 is a simplified perspective view showing the configuration of a bed detection device according to the present embodiment, FIG. 6 is a perspective view showing a modification thereof, and FIG. FIG. 8 is a block diagram showing a schematic configuration of a bed detection system using a bed detection device. In these figures, reference numeral 21 denotes
Shows the load detection mechanism described in the first embodiment.

The occupancy detection device is for detecting whether or not a person is present on the bed. The occupancy detection device here is configured using a load detection mechanism 21. That is, as shown in FIG. 5, the bed detection device includes a load detection mechanism 21 incorporated in a frame of the bed 22, for example, a column 23, and a compression mechanism when a detection signal is output from the load detection mechanism 21. It has a sensor output processing circuit 24 as confirmation means for confirming that the load has reached the set value, and a signal transmission circuit 25 as transmission means for transmitting the confirmation result output from the sensor output processing circuit 24. In this case, the sensor output processing circuit 24 outputs the confirmation result as a digital signal, while the signal transmission circuit 2
Numeral 5 is constituted by using a telephone line or a dedicated digital line 26.

Incidentally, the load detecting mechanism 2 at this time is
1 need not be incorporated in the column 23, but the load detection mechanism 21 only needs to be incorporated in the place on the bed 22 where the weight of the person is added.
Reference numeral 27 in the figure indicates a power supply wiring for supplying power to the sensor output processing circuit 24.

The load detecting mechanism 21 mechanically detects that the applied compressive load has exceeded the initial value and has reached the set value, and detects that the compressive load has reached the set value. A signal is output to the sensor output processing circuit 24, and the four columns 23 of the bed 22 are provided.
Two pillars 2 located at least on the head side of the bed
3 is incorporated. In each of these load detecting mechanisms 21, no person is present on the bed 22, and only the initial value of the compressive load due to the weight of the bed 22, bedding, etc. is applied to the outer shaft member 2 under the condition. Thus, the intermediate shaft member 4 is restrained. Therefore, when a person is present on the bed 22, the weight of the person is passed through the support 23 and the load detection mechanism 2
1 is applied to the outer shaft member 2, and a detection signal indicating that the applied compression load has reached the set value is output from the detection sensor 6 provided in the load detection mechanism 21 to the sensor output processing circuit 24. Will be output.

In this case, the load detecting mechanism 2
Although it is possible to incorporate 1 into all of the columns 23 or into only one column 23, the load detection mechanism 21 is incorporated into the two columns 23 located on the bed head side. Thus, it is sufficient to detect the presence or absence of being in the bed, and it is needless to say that the detection signal from either one can be used for reliable detection. At this time, it is conceivable that a person is present on the bed 22 at a position deviated to the left or right, but in such a case, the load detection mechanism 21 may be incorporated into the two columns 23. It will surely be able to deal with it. In FIG. 5, the load detection mechanism 21 is incorporated into the upright support 23. However, in the case of a nursing care bed or the like, the bed body on which a person is sleeping is moved up and down and bent. It has been practiced to incorporate the load detecting mechanism 21 into an operating mechanism that operates and directly receives and supports the applied load.

By the way, in the occupancy detection device according to the present embodiment, the signal transmission circuit 25 as the transmission means includes the telephone line or the dedicated digital line 26, but it is not limited to such a configuration. Instead, it is also possible to adopt a non-contact type configuration as shown in FIG. That is, at this time, the signal transmission circuit 25 which is a transmission means provided in the bed detection device includes an IR (infrared) signal transmission circuit 28 which is an electromagnetic wave transmitter installed in the frame of the bed 22 and an outside of the frame of the bed 22 , For example, the bed 22
And an IR signal receiving circuit 29 which is an electromagnetic wave receiver installed in the room where the camera is mounted or behind the ceiling, and the compression load reaches a set value based on a detection signal from the load detection mechanism 21. A confirmation result is to be output to the IR signal transmission circuit 28 from the sensor output processing circuit 24 as confirmation means for confirming that the arrival has been reached. Here, the electromagnetic wave transmitter and the electromagnetic wave receiver do not necessarily need to use IR, and it is a matter of course that weak electromagnetic waves may be used.

When the wireless transmission means as shown in this modification is employed, as shown in FIG.
It is also possible to integrate the sensor output processing circuit 24 and the IR signal transmission circuit 28 and incorporate a portable power source 30 such as a secondary battery. In such a configuration, a telephone line or a dedicated digital line As a result, there is no need to provide the power supply wiring 26 and the power supply wiring 27 around the bed 22. As a result, there is an advantage that the mounting position of the bed 22 in the room can be freely changed.

Further, depending on the occupancy detection device configured by adopting the wireless transmission means, it is also possible to configure an occupancy detection system as schematically shown in FIG. That is, a large number of beds 22 placed in each hospital room
The presence / absence of the hospitalized patient on the bed 22 is wirelessly transmitted from the IR signal transmitting circuit 28 of the transmitting means incorporated in each of them to the IR signal receiving circuit 29, and connected to these IR signal receiving circuits 29. The interface units (IFUs) 31 connected to each other by the Ethernet 32 already installed in the hospital, and connected to each Ethernet 32 via the repeater 33, and the presence / absence of presence on the monitor screen 34 is checked. It is a system to grasp.

[0041]

As described above, in the load detecting mechanism according to the present invention, one of the inner shaft member and the outer shaft member moves relative to the other as the initial value of the compressive load is applied. Displacement, the mechanical structure that detects by the detection means that the shaft member that has continued to be displaced with the application of a further compressive load until it reaches the set value of the compressive load is adopted, Even if the initial value changes, it is possible to easily cope with it, and it is possible to obtain an effect that it is possible to reliably detect that the compression load has reached the set value.

According to the on-bed detection device of the present invention, the load detection mechanism itself detects that the compression load has reached the set value due to the presence of a person on the bed. It is not necessary to determine the presence or absence of the floor, and it is only necessary to have a function to confirm the presence of a person based on the detection signal output from the load detection mechanism. Become. In addition, as a result of being able to perform intensive management via the transmission means, it is possible to obtain an effect that it is possible to grasp whether or not an inpatient is in bed at a nurse station or the like without interruption. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating a configuration of a load detection mechanism according to the present embodiment.

FIG. 2 is a transverse sectional view taken along the line AA in FIG.

FIG. 3 is a cross-sectional view taken along line BB in FIG.

FIG. 4 is a cross-sectional view taken along the line CC in FIG.

FIG. 5 is a simplified perspective view showing a configuration of the presence detection device according to the present embodiment.

FIG. 6 is a perspective view showing a modified example thereof.

FIG. 7 is a block diagram showing a schematic configuration of a checking means.

FIG. 8 is a block diagram illustrating a schematic configuration of a bed detection system using the bed detection device.

[Explanation of symbols]

 Reference Signs List 1 inner shaft member 2 outer shaft member 3 detecting means 4 intermediate shaft member 5 sensor dog 6 detection sensor 11 block piece (position regulating member) 12 coil spring (height setting member) 21 load detecting mechanism 22 bed 23 frame 24 sensor output processing circuit (Confirmation means) 25 Signal transmission circuit (transmission means) 28 IR signal transmission circuit (electromagnetic wave transmitter) 29 IR signal reception circuit (electromagnetic wave receiver)

Claims (8)

[Claims] 1. A load detecting mechanism for detecting that an applied compressive load has exceeded an initial value and has reached a set value, wherein the inner shaft member and the outer shaft member are relatively movable along a direction in which the compressive load is applied. A load detecting mechanism, comprising: a shaft member; and a detecting means interposed between the shaft members and detecting that a compressive load has reached a set value. 2. A load detecting mechanism according to claim 1, wherein said detecting means comprises: a sensor dog which relatively moves in response to application of a compressive load; and a detection sensor which detects the end of operation of said sensor dog and outputs a detection signal. A load detecting mechanism comprising: 3. The load detecting mechanism according to claim 2, further comprising an intermediate shaft member interposed between the inner shaft member and the outer shaft member, wherein the intermediate shaft member is an inner shaft member or an outer shaft. One of the members is displaceably and restrainably supported, and one of a sensor dog and a detection sensor is provided. The other of the inner shaft member or the outer shaft member is the other of the sensor dog or the detection sensor. A load detecting mechanism, wherein the load detecting mechanism is provided. 4. The load detecting mechanism according to claim 3, wherein one of the inner shaft member and the outer shaft member has one of a sensor dog and a detection sensor connected to the other through an intermediate shaft member. A position regulating member to be opposed is provided, and between one of the sensor dog or the detection sensor and the position regulating member, a height setting for setting an initial height for one of the sensor dog and the other of the detection sensor A load detection mechanism, wherein a member is provided. 5. The load detecting mechanism according to claim 4, wherein the height setting member is a coil spring externally fitted to the intermediate shaft member, and the coil spring has one of a sensor dog and a detection sensor connected to the other. A load detecting mechanism having a free length positioned at an opposing initial height. 6. A load detecting device according to claim 1, wherein said detecting device detects whether or not a person is present on the bed, and is incorporated in a frame of the bed. A mechanism for confirming that the compression load has reached a set value when a detection signal is output from the load detection mechanism, and a transmission unit for transmitting a confirmation result output from the confirmation unit. Characterized presence detection device. 7. The on-bed detection device according to claim 6, wherein the confirmation means outputs a confirmation result by a digital signal, and the transmission means is constituted by using a telephone line or a dedicated digital line. An on-bed detection device, characterized in that 8. The on-bed detection device according to claim 6, wherein the confirmation means outputs a confirmation result by a digital signal, and the transmission means includes an electromagnetic wave transmitter installed in a frame of the bed. And an electromagnetic wave receiver installed outside the frame of the bed.