JP2018183699A - Toilet seat lifting device - Google Patents

Abstract

[Problem] To provide a toilet seat lifting device that is highly maintainable and can detect and deal with malfunctions in the drive units. [Solution] The device includes a plurality of drive units that lift and lower the toilet seat by driving them, a plurality of spindles, a drive source that rotates the plurality of spindles, a measurement unit that measures a variable parameter of at least one of the spindles and the drive source, a malfunction detection unit that detects malfunctions in the plurality of drive units, and a countermeasure unit that takes countermeasures when a malfunction is detected, the plurality of drive units comprise a first drive unit and a second drive unit, the first spindle that drives the first drive unit and the second spindle that drives the second drive unit, and the measurement unit measures the current values flowing to the first motor and the second motor, and detects the malfunction when the current value of one of the first motor and the second motor falls below a predetermined value and the current value of the remaining one of the first motor and the second motor exceeds a predetermined value. [Selected Figure] Figure 9

Description

  The present invention relates to a toilet seat lifting apparatus that is installed in a Western-style toilet and raises and lowers a toilet seat.

  When a disabled person or an elderly person uses a Western-style toilet, the physical burden when sitting on the toilet seat or standing up from the toilet seat is large. Therefore, in order to reduce such a physical burden, a toilet seat lifting and lowering device having a function of lifting and lowering the toilet seat using an electric force has been developed (Patent Document 1).

  In such a conventional toilet seat elevating device, there are a plurality of action points for raising and lowering the toilet seat, and a drive unit that raises and lowers the toilet by driving to each action point, and a rotation with respect to this drive unit Thus, a plurality of electric telescopic members configured with a drive source that drives the drive unit are provided.

JP 2010-184093 A

  If there is a defective drive part among these electric expansion and contraction members, no force is applied to the operating point corresponding to the electric expansion and contraction member having the defective drive part, and the remaining operation is compatible with the electric expansion and contraction member with good operation. Since force is correctly applied to the acting point, the toilet seat may tilt and move up and down. Therefore, it is desirable to find and deal with malfunctioning drive units.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a toilet seat lifting / lowering device that can detect and deal with a failure of a drive unit and has high maintainability.

  In order to achieve the above-described object, the toilet seat lifting / lowering device according to the present invention drives a toilet seat of a toilet bowl by driving to and from a plurality of driving units provided at different positions, and the plurality of driving units. A plurality of spindles that are rotatably connected and rotate to drive the drive unit; a drive source that rotates the spindles; respectively, and when the drive source rotates the spindle, A measurement unit that measures at least one variation parameter of the drive source, a failure detection unit that detects one failure among the plurality of drive units based on the variation parameter measured by the measurement unit, and the failure detection unit A first handling unit that moves up and down one end side of the toilet seat. A second drive unit that raises and lowers the other end of the toilet seat, wherein the plurality of spindles includes a first spindle that drives the first drive unit, and a second spindle that drives the second drive unit. The measurement unit measures the value of current flowing to the first motor and the second motor, and the defect detection unit includes the first motor and the second motor measured by the measurement unit. When the current value flowing to any one of the first motor and the second motor is less than a predetermined value and the current value flowing to the remaining one of the first motor and the second motor is equal to or greater than a predetermined value, It is characterized by detecting defects.

In the present invention configured as described above, the toilet seat lifting / lowering device can detect a failure of the drive unit by measuring at least one variation parameter among the drive unit, the spindle, and the drive source, and can detect the failure of the drive unit. In this case, since a predetermined measure is taken, the user can take some measures immediately when a failure of the drive unit occurs, and a toilet seat lifting device with high maintainability can be provided.
In addition, the failure detection unit detects a failure of the drive unit based on the parameters measured by the measurement unit, and the handling unit stops the operation of the motor that raises and lowers one end side and the other end side of the toilet seat when the failure is detected. It is possible to prevent the toilet seat from being tilted and raised due to the drive of the defective drive unit and the non-defective drive unit.
Further, the defect detection unit has a current value flowing to any one of the first motor and the second motor measured by the measurement unit equal to or less than a predetermined value, and the remaining 1 of the first motor and the second motor. When the value of the current flowing to one of the motors exceeds a predetermined value, it is detected that the drive unit is defective. Therefore, the drive unit is accurately driven by simple control of measuring the current value flowing to each motor. Defects can be detected.

  In order to achieve the above-described object, the toilet seat lifting / lowering device according to the present invention drives a toilet seat of a toilet bowl by driving to and from a plurality of driving units provided at different positions, and the plurality of driving units. A plurality of spindles that are rotatably connected and rotate to drive the drive unit; a drive source that rotates the spindles; respectively, and when the drive source rotates the spindle, A measurement unit that measures at least one variation parameter of the drive source, a failure detection unit that detects one failure among the plurality of drive units based on the variation parameter measured by the measurement unit, and the failure detection unit A first handling unit that moves up and down one end side of the toilet seat. A second drive unit that raises and lowers the other end of the toilet seat, wherein the plurality of spindles includes a first spindle that drives the first drive unit, and a second spindle that drives the second drive unit. The drive source includes a first motor that rotates the first spindle and a second motor that rotates the second spindle, and the measurement unit includes the first motor and the second motor. The failure detection unit is configured to determine in advance at least one of a change amount of the current value flowing to the first motor and a change amount of the current value flowing to the second motor measured by the measurement unit. It is characterized in that the defect is detected when the value exceeds the specified value.

In the present invention configured as described above, the toilet seat lifting / lowering device can detect a failure of the drive unit by measuring at least one variation parameter among the drive unit, the spindle, and the drive source, and can detect the failure of the drive unit. In this case, since a predetermined measure is taken, the user can take some measures immediately when a failure of the drive unit occurs, and a toilet seat lifting device with high maintainability can be provided.
In addition, the failure detection unit detects a failure of the drive unit based on the parameters measured by the measurement unit, and the handling unit stops the operation of the motor that raises and lowers one end side and the other end side of the toilet seat when the failure is detected. It is possible to prevent the toilet seat from being tilted and raised due to the drive of the defective drive unit and the non-defective drive unit.
The defect detection unit is referred to as displacement measurement of the current value flowing to each motor in order to detect a defect when the amount of change in the current value flowing to the first motor measured by the measurement unit is equal to or greater than a predetermined value. By simple control, it is possible to accurately detect the drive failure of the drive unit.

  In order to achieve the above-described object, the toilet seat lifting / lowering device according to the present invention drives a toilet seat of a toilet bowl by driving to and from a plurality of driving units provided at different positions, and the plurality of driving units. A plurality of spindles that are rotatably connected and rotate to drive the drive unit; a drive source that rotates the spindles; respectively, and when the drive source rotates the spindle, A measurement unit that measures at least one variation parameter of the drive source, a failure detection unit that detects one failure among the plurality of drive units based on the variation parameter measured by the measurement unit, and the failure detection unit A first handling unit that moves up and down one end side of the toilet seat. A second drive unit that raises and lowers the other end of the toilet seat, wherein the plurality of spindles includes a first spindle that drives the first drive unit, and a second spindle that drives the second drive unit. The drive source comprises a first motor for rotating the first spindle and a second motor for rotating the second spindle, and the plurality of spindles can be rotated together with the plurality of spindles. A plurality of magnets are provided, the measurement unit measures the amount of magnetic flux by the plurality of magnets, and the defect detection unit is a hole that is a period of change of each magnetic flux amount measured by the measurement unit. It is characterized in that the defect is detected when the amount of change in the period becomes equal to or greater than a predetermined value.

In the present invention configured in this way, in the present invention configured in this way, the toilet seat lifting device measures at least one variation parameter of the drive unit, the spindle, and the drive source, thereby When a failure is detected and a drive unit failure is detected, a predetermined action is taken, so that the user can take any action immediately when a drive unit failure occurs, and the toilet seat has high maintainability. A lifting device can be provided.
In addition, the failure detection unit detects a failure of the drive unit based on the parameters measured by the measurement unit, and the handling unit stops the operation of the motor that raises and lowers one end side and the other end side of the toilet seat when the failure is detected. It is possible to prevent the toilet seat from being tilted and raised due to the drive of the defective drive unit and the non-defective drive unit.
Further, the defect detection unit detects that the drive unit is defective when the amount of change in the Hall period of each magnetic flux measured by the measurement unit is equal to or greater than a predetermined value. With a simple control of measuring the amount of change, it is possible to accurately detect the drive failure of the drive unit.

  ADVANTAGE OF THE INVENTION According to this invention, the failure of a drive part can be discovered and dealt with, and the toilet seat raising / lowering apparatus with high maintainability can be provided.

It is a side view which shows the state which attached the toilet seat raising / lowering apparatus which is this embodiment to the toilet bowl. It is a front view of the toilet seat raising / lowering apparatus in FIG. It is a perspective view which shows the drive part which comprises the toilet seat raising / lowering apparatus in FIG. It is the schematic which shows the internal structure of the electrically driven expansion-contraction drive body and controller which comprise the toilet seat raising / lowering apparatus in FIG. It is a figure which shows the operation state of the drive part in FIG. It is a side view which shows the state which raised the toilet seat raising / lowering apparatus in FIG. 1 in the horizontal state. It is a front view of the toilet seat raising / lowering device in FIG. It is a figure which shows the pulse signal output from each Hall element which comprises the toilet seat raising / lowering apparatus in FIG. It is a flowchart which shows the operation | movement which detects the defect of the drive part by 1st embodiment of this invention. 10 is a graph of the amount of current flowing to the motor with respect to the amount of extension of the electric telescopic drive body in FIG. 9. It is a flowchart which shows the operation | movement which detects the defect of the drive part by 2nd embodiment of this invention. 12 is a graph of the amount of change per unit time in the amount of current flowing to the motor with respect to the amount of extension of the electric telescopic drive body in FIG. It is a flowchart which shows the operation | movement which detects the defect of the drive part by 3rd embodiment of this invention. It is a graph of the period of the pulse signal output from a Hall element with respect to the expansion amount of the electric expansion-contraction drive body in FIG.

  Hereinafter, a toilet seat lifting and lowering device according to an embodiment of the present invention will be specifically described with reference to the drawings.

(About the overall structure of the toilet seat lifting device)
FIG. 1 is a side view showing the toilet seat lifting / lowering apparatus according to the present embodiment attached to a toilet, FIG. 2 is a front view of the toilet seat lifting / lowering apparatus in FIG. 1, and FIG. 3 is the toilet seat lifting / lowering in FIG. FIG. 4 is a perspective view showing a drive unit constituting the apparatus, and FIG. 4 is a schematic view showing an internal structure of an electric telescopic drive body and a controller constituting the toilet seat lifting apparatus in FIG.
The outline of the toilet seat lifting / lowering device 10 according to this embodiment will be described first with reference to these drawings.

  As shown in FIG. 1 to FIG. 3, the toilet 11 is provided with a toilet seat 12 for a user to sit on when using the toilet, and is placed on the floor surface F. The toilet seat lifting / lowering device 10 of the present embodiment is used by being attached to the toilet bowl 11 in order to lift and lower the toilet seat 12 of the western style toilet bowl 11 with electric power. The toilet seat lifting / lowering device 10 includes a support member 13 that supports the toilet seat 12 on the toilet 11, and lift members 14 a and 14 b that are provided by hanging from the left and right ends of the support member 13 to the left and right sides of the toilet 11. A gate-shaped toilet seat cradle 15, a fixing member 16 locked so as to be fixed from above the toilet 11, and a side surface provided by hanging from the fixing member 16 to the left and right sides of the toilet 11. And a toilet bowl 18 having members 17a and 17b.

  The upper arm member 19a is fixed below the toilet seat cradle 15 and supports the toilet seat cradle 15 so that it can be raised and lowered between the highest position and the lowest position. By connecting the elevating member 14a (14b) and the side member 17a (17b) via (19b) and the lower arm member 20a (20b), a pair of left and right four-joint links 21a, 21b are formed. The upper arm member 19a (19b) is formed of a semicircular plate material at both ends, and the lower arm member 20a (20b) is formed of a substantially triangular plate material whose corners are arc-shaped.

  Further, in order to cause the lower arm member 20a (20b) of the four-bar link 21a (21b) to move up and down in a vertical direction including a horizontal posture, the left and right arranged in a substantially horizontal state at a rear position from the four-bar link 21a (21b) A pair of electric telescopic drive bodies 22a (22b) is provided. Then, the front fulcrums 19ax (19bx) and 20ax (20bx) of the upper arm member 19a (19b) and the lower arm member 20a (20b) are respectively pivotally supported by the elevating member 14a (14b), and the upper arm member 19a (19b) and The rear fulcrums 19ay (19by) and 20ay (20by) of the lower arm member 20a (20b) are pivotally supported on the side member 17a (17b) and below the rear fulcrum 20ay (20by) of the lower arm member 20a (20b). The driving force point 20az (20bz) of the electric drive body 22a (22b) is disposed.

  Of the elevating member 14a (14b), the side member 17a (17b), the toilet fixing base 18, the upper arm member 19a (19b), the lower arm member 20a (20b), and the four-bar links 21a and 21b described above, the toilet bowl 11 are collectively referred to as the first action part 26a, and those arranged on the left side of the toilet 11 are collectively referred to as the second action part 26b.

  Here, with reference to FIG. 3, the four-bar link 21a (21b) which comprises the toilet seat raising / lowering apparatus 10 is demonstrated. 3 is arranged on the right side surface of the toilet 11, the four-node link 21b arranged on the left side of the toilet 11 is a mirror surface of the four-link 21a. Since it is a symmetrical structure and has the same function, the description thereof is omitted.

  As shown in FIG. 3, the first rod 22c of the electric telescopic drive body 22a arranged in a substantially horizontal state is expanded and contracted in a substantially horizontal direction, and the lower arm member 20a is placed in a horizontal posture (a front fulcrum 20ax and a rear fulcrum 20ay are When the four-joint link 21a is driven by moving up and down including a horizontally aligned posture), the lifting member is pivotally supported by the front fulcrums 19ax and 20ax of the upper arm member 19a and the lower arm member 20a constituting the four-joint link 21a. 14a can be moved up and down.

  As described above, the elevating member 14a is moved up and down by the upper arm member 19a and the lower arm member 20a that are raised and lowered by the first rod 22c of the electric telescopic drive body 22a that expands and contracts in a substantially horizontal direction, and is thus connected above the elevating member 14a. The toilet seat 12 (see FIG. 2) fixed to the provided support member 13 can be raised and lowered.

  Further, since the driving force point 20az of the lower arm member 20a, which is driven by the first rod 22c of the electric telescopic driving body 22a, is disposed at a position away from the front fulcrum 20ax and the rear fulcrum 20ay, the lower arm member 20a. The rotational moment of can be increased. Therefore, the thrust of the electric telescopic drive body 22a may be relatively small.

  As shown in FIG. 4, in the first casing 22d, the electric telescopic drive body 22a is screwed into the first nut 22f and a cylindrical first rod 22c having a first nut 22f at the base end. A first spindle 22e inserted into the first rod 22c, a first magnet 22g provided at the base end of the first spindle 22e, and a first motor 22j as a drive source for rotationally driving the first spindle 22e; And a first Hall element 22k that detects a change in magnetic flux of the first magnet 22g. In addition, the 1st action part 26a, the 1st rod 22c, and the 1st nut 22f are collectively made into the 1st drive part 24a.

  Similarly, the electric telescopic drive body 22b includes a cylindrical second rod 22n having a second nut 22m at the base end in the second casing 22l and a second rod in a state of being screwed to the second nut 22m. A second spindle 22o inserted into 22n, a second magnet 22p provided at the base end of the second spindle 22o, a second motor 22q as a drive source for rotationally driving the second spindle 22o, and a second And a second Hall element 22r that detects a change in magnetic flux of the magnet 22p. In addition, the 2nd action part 26b, the 2nd rod 22n, and the 2nd nut 22m are collectively made into the 2nd drive part 24b, and it is provided in the position different from the 1st drive part 24a.

  The first magnet 22g and the second magnet 22p are circularly arranged on the outer circumference of the first spindle 22e and the second spindle 22o, respectively, so that a plurality of N poles and S poles are adjacent to each other. With such a configuration, when the first spindle 22e or the second spindle 22o rotates, the magnetic flux at a position near the corresponding first spindle 22e or the second spindle 22o changes.

  Based on signals from the first hall element 22k and the second hall element 22r in the pair of left and right electric telescopic drive bodies 22a and 22b, the electric telescopic drive bodies 22a and 22b are operated in synchronization with each other. As shown in FIG. 1, the synchronizing part 25a is provided in the controller 25 comprised with the electronic circuit containing the microcomputer arrange | positioned above the electrically driven expansion-contraction drive body 22b.

  FIG. 8 is a diagram showing pulse signals output from the respective hall elements constituting the toilet seat lifting apparatus in FIG. 8A is a diagram illustrating a pulse signal output from the first Hall element 22k, and FIG. 8B is a diagram illustrating a pulse signal output from the second Hall element 22r. This means that the shorter the period of the pulse signal, the faster the change in magnetic flux, that is, the faster the expansion / contraction speed of the electric expansion / contraction drive. The synchronization unit 25a subdivides the period of each pulse signal into an arbitrary value so that the lift distance of the toilet seat 12 does not shift due to the difference in the expansion / contraction speed of each electric expansion / contraction drive body. Count every time. When a deviation occurs in the count number, the motor corresponding to the Hall element that detects the pulse signal whose count number is advanced is stopped. Thereafter, when the respective count numbers coincide with each other, the stopped motor is driven again. In the present embodiment, as shown in FIG. 8, the synchronization unit 25a sets the period of the pulse signal output from the first Hall element 22k and the period of the pulse signal output from the second Hall element 22r to 10 etc., respectively. Divide and count every 1 minute. At that time, when a deviation of 3 counts occurs, the second motor 22q corresponding to the second Hall element 22r whose count number is advanced is stopped, and when the respective count numbers match, the second motor 22q stopped again. The second motor 22q is driven. With such a configuration, the shift can be corrected more finely and quickly than the method of synchronizing by counting the respective pulse signals. In the present embodiment, the synchronization unit 25a divides the period of the pulse signal output from the first Hall element 22k and the period of the pulse signal output from the second Hall element 22r into 10 equal parts, and performs counting. The configuration is such that the synchronization operation is performed when a deviation of 3 counts occurs. However, the present invention is not limited to this, and any value may be used for the amount of subdivision and the amount of deviation of the count number that triggers the synchronization operation. good.

  Returning to FIG. 4, in the controller 25, in addition to the synchronizing unit 25a, when the first motor 22j or the second motor 22q rotates the first spindle 22e or the second spindle 22o, the first driving unit 24a and the second drive unit 24b, the first spindle 22e and the second spindle 22o, the measurement unit 25c that measures at least one variation parameter among the first motor 22j and the second motor 22q, and the variation measured by the measurement unit 25c A failure detection unit 25b that detects one failure of the first drive unit 24a and the second drive unit 24b based on the parameters, and a handling unit 25d that performs a predetermined response when the failure detection unit 25b detects a failure; , Is provided. In the present embodiment, the synchronization unit 25a, the measurement unit 25c, the defect detection unit 25b, and the handling unit 25d are mounted in the control unit 25 and controlled by a microcomputer having a CPU having a programming function and a memory having a storage function. . The microcomputer may be constituted by a logic circuit. The “defect” of the first drive unit 24a in the present invention is a state in which the first action unit 26a cannot be driven by the force of the rotation of the first spindle 22e, and the second drive unit 24b in the present invention. The “defect” is a state in which the driving force generated by the rotation of the second spindle 22o cannot be driven by the rotating force. The roles of the measurement unit 25c, the defect detection unit 25b, and the handling unit 25d will be described in detail later.

  As shown in FIG. 1 and FIG. 2, when the first rod 22c of the electric telescopic drive body 22a is extended in the toilet seat lifting / lowering device 10 in which the toilet seat cradle 15 is at the lowest position, from FIG. 3 and FIG. 5 (a). As shown in FIG. 5 (b), the lower arm member 20a and the upper arm member 19a get up while rotating clockwise around the rear fulcrums 20ay and 19ay, respectively, and as shown in FIGS. The cradle 15 stops when it reaches the highest position (rise position).

  As shown in FIGS. 6 and 7, when the first rod 22c of the electric telescopic drive body 22a is retracted in the toilet seat lifting / lowering device 10 in which the toilet seat cradle 15 is at the highest position, FIGS. ) To FIG. 5 (a), the lower arm member 20a and the upper arm member 19a fall down while rotating counterclockwise around the rear fulcrums 20ay and 19ay, respectively, as shown in FIGS. Thus, the toilet seat cradle 15 stops when it reaches the lowest position.

  Thus, the toilet seat 12 can be lifted and lowered together with the toilet seat cradle 15 by driving the four-joint links 21a and 21b by expanding and contracting the electric telescopic drive bodies 22a and 22b. For this reason, a user's waist | hip | lumbar part seated on the toilet seat 12 can be raised / lowered with the toilet seat 12, and a user's physical burden can be reduced significantly. Further, since the toilet seat lifting / lowering device 10 uses the electric telescopic drive bodies 22a and 22b that extend and contract in a substantially horizontal direction, as shown in FIGS. 1 and 2, the lowermost parts of the electric telescopic drive bodies 22a and 22b. A wide gap S between the portion and the floor surface F can be ensured, and the cleanability of the floor surface F is also good. Moreover, since the electric expansion / contraction drive bodies 22a and 22b extend and contract in a substantially horizontal direction, the vertical occupation space of the electric expansion / contraction drive bodies 22a and 22b is reduced, so that a storage space for the hot water storage tank can be secured. It can also be used for hot water storage type toilet seats, and the degree of design freedom is also increased.

(About the drive part defect detection operation | movement by 1st embodiment of this invention)
FIG. 9 is a flowchart illustrating an operation of detecting a failure of the drive unit according to the first embodiment of the present invention, and FIG. 10 is a graph of the amount of current flowing to the motor with respect to the amount of expansion of the electric telescopic drive body in FIG. is there.

  In 1st embodiment, the measurement part 25c measures the electric current value which flows into the 1st motor 22j and the 2nd motor 22q. Then, the defect detection unit 25b detects when the current value flowing to one motor measured by the measurement unit 25c is equal to or less than a predetermined value and the current value flowing to the other motor is equal to or greater than a predetermined value. The failure of the drive unit corresponding to the motor whose current value is equal to or less than a predetermined value is detected.

  This specific operation will be described with reference to the flowchart of FIG. When the toilet seat lifting / lowering device 10 is in a standby state (S100), when a toilet seat lifting switch 27 (not shown) provided in the toilet seat lifting / lowering device is pressed (S101yes), the position of the toilet seat 12 is set from a preset maximum position. When it is in a low position (S102no), the seat surface of the toilet seat lifting / lowering device 10 is raised and the toilet seat 12 is raised (S103). When the position of the toilet seat 12 is at the preset maximum position (S102 yes), the seat surface of the toilet seat lifting / lowering device 10 does not rise and returns to the standby state.

  Arbitrary time after the seat surface of the toilet seat lifting / lowering device 10 rises, that is, 1 second to 5 which is the time from when the seat surface of the toilet seat lifting / lowering device 10 rises to before the toilet seat 12 becomes an unexpected tilt of the user After the second time has elapsed, the measurement unit 25c measures the current values Im1 and Im2 flowing to the first motor 22j and the second motor 22q (S104). The defect detection unit 25b compares the current values Im1 and Im2 measured by the measurement unit 25c with Ith2, which is a value different from the threshold values Ith1 and Ith1 preset in the defect detection unit 25b, and Im1> Ith1 and Im2 < When Ith2 is satisfied, a failure of the second drive unit 24b corresponding to the second motor 22q is detected, and when Im1 <Ith1 and Im2> Ith2, the first drive corresponding to the first motor 22j is detected. A defect of the part 24a is detected (S105). The threshold values Ith1 and Ith2 can be freely set by the user.

In the toilet seat lifting / lowering device 10, for example, if a failure occurs in the first drive unit 24a, when the toilet seat lifting switch 27 is pressed to instruct the toilet seat lifting / lowering operation, Only the other electric telescopic drive 22b rises without raising. At this time, since the tilt of the toilet seat 12 occurs, the tilt causes distortion in the fitting of the second rod 22n and the second nut 22m of the electric telescopic drive body 22b and the second spindle 22o, Since the load applied to the second rod 22n and the second nut 22m of the electric telescopic drive 22b is increased, the rotational speed of the second spindle 22o is slower than the rotational speed of the first spindle 22e. When the rotation speed of the motor becomes slow, the magnitude of the counter electromotive force generated in the motor also becomes small. Therefore, as shown in FIG. 10, the current value Im2 flowing through the second motor 22q is the current value Im1 flowing through the first motor 22j. Compared to On the other hand, since the current flowing through the first motor 22j is defective in the first drive unit 24a, the driving force generated by the rotation of the first spindle e driven by the first motor 22j is applied to the first action unit a. Since it is not transmitted, it is in a substantially no-load state. Therefore, the current value of the first motor 22j is the same as that at the time of no load, and the first motor 22j has the lowest current value.
In FIG. 10, the vertical axis represents the value of current flowing through each motor, and the horizontal axis represents the extension amount of each electric telescopic drive body. Im10 is a current value that flows through the first motor 22j when there is no defect in the first drive unit 24a and the second drive unit 24b, and Im20 is in the first drive unit 24a and the second drive unit 24b. This is the value of the current flowing through the second motor 22q when no defect has occurred. In the first embodiment, the defect detection unit 25b uses the above-described principle to detect a defect in the first drive unit 24a corresponding to the first motor 22j when Im1 <Ith1 and Im2> Ith2. It is something to detect. Similarly, when a failure occurs in the second drive unit 24b, the failure detection unit 25b detects the second drive unit 24b corresponding to the second motor 22q when Im1> Ith1 and Im2 <Ith2. This is to detect defects.

  When the defect detection unit 25b detects a defect in the first drive unit 24a or the second drive unit 24b (S105), the handling unit 25d stops energization of the first motor 22j and the second motor 22q. Then, the lifting operation of the toilet seat lifting / lowering device 10 is stopped (S106).

  Further, when the toilet seat lifting / lowering device 10 is in a standby state (S100), the toilet seat lifting switch 27 provided in the toilet seat lifting / lowering device 27 is not pressed (S101no), and the toilet seat lowering switch 28 (not shown) provided in the toilet seat lifting / lowering device is not shown. ) Is pressed (S107yes), when the position of the toilet seat 12 is higher than a preset minimum position (S108no), the seat surface of the toilet seat lifting / lowering device 10 is lowered and the toilet seat 12 is lowered (S109). . When the position of the toilet seat 12 is at the preset minimum position (S108 yes), the seat surface of the toilet seat lifting / lowering device 10 does not descend and returns to the standby state.

  In the first embodiment, when the drive unit failure detection operation is performed with a heavy object such as a user placed on the toilet seat 12, a load is applied to the electric telescopic drive bodies 22a and 22b, and the first motor 22j. Since the difference between the current value Im1 flowing through the second motor 22q and the current value Im2 flowing through the second motor 22q increases, it becomes easy to detect a drive unit failure. In this case, the threshold value Ith1 is the value of the current flowing through the first motor 22j when a heavy load of 20 to 60 kg is placed on the toilet seat 12, and the no-load state where no heavy load is placed on the toilet seat 12. It is preferable to set between the value of the current flowing through the first motor 22j. Similarly, the threshold value Ith2 is the value of the current flowing through the second motor 22q when a heavy load of 20 to 60 kg is placed on the toilet seat 12, and the no-load state where no heavy load is placed on the toilet seat 12. It is preferable to set between the current value flowing through the second motor 22q.

  The threshold value Ith1 is, for example, in the graph of the current value Im1 when the extension amount of the electric extension / contraction drive body 22a is 30 mm in a state where the minimum weight assumed as a user, for example, 20 kg is placed on the toilet seat 12. The current value may be set. Similarly, the threshold value Ith2 is, for example, a current when the extension amount of the electric telescopic drive body 22b is 30 mm in a state in which a weight of 20 kg, which is the average weight of a Japanese 6-year-old child, is placed on the toilet seat 12. You may set to the electric current value in the graph of value Im2. With this configuration, the defect detection unit 25b can detect a defect before the toilet seat 12 is increased in inclination even when a lighter child uses the toilet seat lifting / lowering device 10.

(About the drive part defect detection operation by 2nd embodiment of this invention)
FIG. 11 is a flowchart showing an operation of detecting a failure of the drive unit according to the second embodiment of the present invention, and FIG. 12 is a unit time of the amount of current flowing to the motor with respect to the extension amount of the electric extension / contraction drive body in FIG. It is a graph of the amount of change per hit.

  In 2nd embodiment, the measurement part 25c measures the electric current value which flows into the 1st motor 22j and the 2nd motor 22q. Then, when the amount of change in the current value flowing to one of the motors measured by the measuring unit 25c becomes equal to or greater than a predetermined value, the defect detection unit 25b causes the amount of change in the current value to flow below a predetermined value. Detects a defective drive corresponding to the motor.

  This specific operation will be described with reference to the flowchart of FIG. When the toilet seat lifting / lowering device 10 is in the standby state (S200), when the toilet seat lifting switch 27 provided in the toilet seat lifting / lowering device is pressed (S201yes), the position of the toilet seat 12 is lower than the preset maximum position. In the case (S202no), the seat surface of the toilet seat lifting / lowering device 10 is raised and the toilet seat 12 is raised (S203). When the position of the toilet seat 12 is at the preset maximum position (S202 yes), the seat surface of the toilet seat lifting / lowering device 10 does not rise and returns to the standby state.

  When the seat surface of the toilet seat lifting / lowering device 10 starts to rise, the measurement unit 25c measures the current values flowing through the first motor 22j and the second motor 22q, and measures the changes ΔIm1 and ΔIm2 for each ΔT of the current values. (S204). The defect detection unit 25b compares the changes ΔIm1 and ΔIm2 for each ΔT of the current value measured by the measurement unit 25c with ΔIth4, which is a value different from the thresholds ΔIth3 and ΔIth3 set in advance in the defect detection unit 25b, and compares ΔIm1> When ΔIth3, the failure of the second drive unit 24b corresponding to the second motor 22q is detected, and when ΔIm2> ΔIth4, the failure of the first drive unit 24a corresponding to the first motor 22j is detected. (S205). The thresholds ΔIth3 and ΔIth4 can be freely set by the user.

  In the toilet seat lifting / lowering device 10, for example, if a failure occurs in the first drive unit 24a, when the toilet seat lifting switch 27 is pressed to instruct the toilet seat lifting / lowering operation, Only the other electric telescopic drive 22b rises without raising. At this time, since the tilt of the toilet seat 12 occurs, the tilt causes distortion in the fitting of the second rod 22n and the second nut 22m of the electric telescopic drive body 22b and the second spindle 22o, Since the load applied to the second rod 22n and the second nut 22m of the electric telescopic drive 22b is increased, the rotational speed of the second spindle 22o is slower than the rotational speed of the first spindle 22e. When the rotation speed of the motor becomes slow, the magnitude of the counter electromotive force generated in the motor also becomes small, so that the current value Im2 flowing through the second motor 22q increases in accordance with the extension amount of the electric telescopic drive body 22b. As a result, as shown in FIG. 12, the amount of change ΔIm2 for each ΔT of the current value flowing to the second motor 22q is larger than the amount of change ΔIm1 for each ΔT of the current value flowing to the first motor 22j. In FIG. 12, the vertical axis represents the amount of change in current value flowing through each motor for each ΔT, and the horizontal axis represents the amount of expansion of each electric telescopic drive. ΔIm10 is the amount of change for each ΔT of the current value flowing through the first motor 22j when there is no failure in the first drive unit 24a and the second drive unit 24b, and ΔIm20 is the first drive unit 24a and This is the amount of change for each ΔT of the value of the current flowing through the second motor 22q when no defect has occurred in the second drive unit 24b. In the second embodiment, the defect detection unit 25b detects the defect of the second drive unit 24b corresponding to the second motor 22q when ΔIm1> ΔIth3 is satisfied by using the principle described above. Similarly, the defect detection unit 25b detects a defect of the first drive unit 24a corresponding to the first motor 22j when ΔIm2> ΔIth4.

  When the defect detection unit 25b detects a defect in the first drive unit 24a or the second drive unit 24b (S205), the handling unit 25d stops energization of the first motor 22j and the second motor 22q. Then, the lifting operation of the toilet seat lifting / lowering device 10 is stopped (S206).

  Further, when the toilet seat lifting / lowering device 10 is in a standby state (S200), the toilet seat lifting switch 27 provided in the toilet seat lifting / lowering device is not pressed (S201no), and the toilet seat lowering switch 28 (not shown) provided in the toilet seat lifting / lowering device is not shown. ) Is pressed (S207yes), when the position of the toilet seat 12 is higher than a preset minimum position (S208no), the seat surface of the toilet seat lifting device 10 is lowered and the toilet seat 12 is lowered (S209). . When the position of the toilet seat 12 is at the preset minimum position (S208 yes), the seat surface of the toilet seat lifting / lowering device 10 does not descend and returns to the standby state.

  In the second embodiment, when a failure occurs in the first drive unit 24a or the second drive unit 24b, the amount of change ΔIm1 for each ΔT of the current value flowing through the first motor 22j and the current value flowing through the second motor 22q. Since the change amount ΔIm2 for each ΔT basically does not depend on the weight and does not change, the threshold value ΔIth3 and the threshold value ΔIth4 are set with a standard weight (for example, 60 kg) on the toilet seat 12, Either the first drive unit 24a or the second drive unit 24b is simply set in a defective state, and the amount of change in current value flowing through the first motor 22j or the second motor 22q at that time is checked for each ΔT. The threshold value may be determined based on the amount of change.

(About the drive part defect detection operation by 3rd embodiment of this invention)
FIG. 13 is a flowchart showing an operation of detecting a failure of the drive unit according to the third embodiment of the present invention, and FIG. 14 is a pulse signal output from the Hall element with respect to the extension amount of the electric extension / contraction drive body in FIG. It is a graph of the period.

  In the third embodiment, the measurement unit 25c measures the amount of magnetic flux generated by the first magnet 22g and the second magnet 22p. Then, when the change amount of the hole period, which is the change period of each magnetic flux amount measured by the measurement unit 25c, is equal to or greater than a predetermined value, the defect detection unit 25b sets one of the drive units 24a, 24b to one of the drive units 24a, 24b. Detect that a defect has occurred.

  This specific operation will be described with reference to the flowchart of FIG. When the toilet seat lifting / lowering device 10 is in a standby state (S300), when the toilet seat lifting switch 27 provided in the toilet seat lifting / lowering device is pressed (S301yes), the position of the toilet seat 12 is lower than a preset maximum position. In the case (S302no), the seat surface of the toilet seat lifting / lowering device 10 is raised and the toilet seat 12 is raised (S303). When the position of the toilet seat 12 is at the preset maximum position (S302 yes), the seat surface of the toilet seat lifting / lowering device 10 does not rise and returns to the standby state.

  When the seat surface of the toilet seat lifting / lowering device 10 starts to rise, the measuring unit 25c measures the amount of magnetic flux generated by the first magnet 22g and the second magnet 22p detected by the first Hall element 22k and the second Hall element 22r. Then, change amounts ΔT1 and ΔT2 for each ΔT of the period in which each magnetic flux changes are measured (S304). The defect detection unit 25b compares the change amounts ΔT1 and ΔT2 of the magnetic flux amount for each ΔT measured by the measurement unit 25c with a threshold value ΔTth preset in the defect detection unit 25b, and when ΔT1> ΔTth and ΔT2> ΔTth are satisfied. Next, a failure of the second drive unit 24b corresponding to the first motor 22j and the second motor 22q is detected (S305). The threshold ΔTth can be freely set by the user.

  In the toilet seat lifting / lowering device 10, if a failure occurs in the drive unit 24a, when the toilet seat lifting / lowering switch 27 is pressed and the toilet seat lifting / lowering operation is instructed, the electric telescopic drive body 22a that has failed does not rise. Only the other electric telescopic drive 22b is raised. At this time, since the tilt of the toilet seat 12 occurs, the tilt causes distortion in the fitting of the second rod 22n and the second nut 22m of the electric telescopic drive body 22b and the second spindle 22o, Since the load on the second rod 22n and the second nut 22m increases, the rotational speed of the second spindle 22o becomes slower than the rotational speed of the first spindle 22e. As a result, a deviation occurs in the number of counts of the cycle of the pulse signals output from the first Hall element 22k and the second Hall element 22r. Therefore, as shown in FIG. The first motor 22j corresponding to the detected first hall element 22k is stopped, and when the respective count numbers match, the stopped first motor 22j is driven again. As a result, as shown in FIG. 14, the changes ΔT1 and ΔT2 for each ΔT of the periods T1 and T2 in which the magnetic fluxes generated by the first magnet 22g and the second magnet 22p change are increased. In FIG. 14, the vertical axis represents a cycle in which the magnetic flux generated by each magnet changes, and the horizontal axis represents the extension amount of each electric telescopic drive body. T10 is the period of the magnetic flux generated by the first magnet 22g when no defect has occurred in the first drive unit 24a and the second drive unit 24b, and T20 is the first drive unit 24a and the second drive unit. This is the period of magnetic flux generated by the second magnet 22p when no defect occurs in 24b. In the third embodiment, the defect detection unit 25b uses the principle described above, and when ΔT1> ΔTth and ΔT2> ΔTth, either the first drive unit 24a or the second drive unit 24b It detects that it is defective.

  When the defect detection unit 25b detects a defect in the first drive unit 24a or the second drive unit 24b (S305), the handling unit 25d stops energization of the first motor 22j and the second motor 22q. Then, the lifting operation of the toilet seat lifting / lowering device 10 is stopped (S306).

  When the toilet seat lifting / lowering device 10 is in a standby state (S300), the toilet seat lifting switch 27 provided on the toilet seat lifting / lowering device 27 is not pressed (S301no), and the toilet seat lowering switch 28 (not shown) provided on the toilet seat lifting / lowering device is not shown. ) Is pressed (S307yes), when the position of the toilet seat 12 is higher than a preset minimum position (S308no), the seat surface of the toilet seat lifting device 10 is lowered and the toilet seat 12 is lowered (S309). . When the position of the toilet seat 12 is at the preset minimum position (S308 yes), the seat surface of the toilet seat lifting / lowering device 10 does not descend and returns to the standby state.

  In the third embodiment, when a failure occurs in the first drive unit 24a or the second drive unit 24b, the change amount ΔT1 for each ΔT of the cycle in which the magnetic flux generated by the first magnet 22g and the second magnet 22p changes and Since ΔT2 basically does not depend on the weight and does not change, the threshold value ΔTth is the first drive unit 24a or the second drive in a state where a standard weight (for example, 60 kg) is placed on the toilet seat 12. One of the parts 24b is simply set to a defective state, the amount of change of the current value flowing through the first motor 22j or the second motor 22q at that time is confirmed for each ΔT, and the threshold is determined based on the amount of change at that time And good.

  As described above, in the present invention, the toilet seat lifting / lowering device 10 includes at least one of the first drive unit 24a and the second drive unit 24b, the first spindle 22e and the second spindle 22o, and the first motor 22j and the second motor 22q. By measuring the fluctuation parameter, a failure of the drive unit 24a or 24b can be detected, and when a failure of the drive unit 24a or 24b is detected, the user performs a predetermined countermeasure, and the user performs a failure of the drive unit 24a or 24b. In the event that a failure occurs, some measures can be taken immediately and maintenance is high, that is, when a failure occurs in the drive unit 24a or 24b, the drive unit 24a or 24b in which the failure occurs is inspected and replaced. Thus, the toilet seat lifting / lowering device 10 that can perform the above-described operation can be provided.

(Modification)
As mentioned above, although embodiment of the technique which this application discloses was described, the technique which this application discloses is not limited above.

  For example, in the present embodiment, the first action part 26a and the second action part 26b act to move the toilet seat 12 up and down depending on the extension amount of the first rod 22c and the second rod 22n. The first rod 22c and the second rod 22n may be configured to raise and lower the toilet seat 12 directly.

  In the present embodiment, two drive units, spindles, and drive motors are provided. However, the present invention is not limited to this, and three or more motors may be provided. If three or more are provided, costs such as material costs are required, so two are preferably provided.

  In the present embodiment, the first rod 22c and the second rod 22n, or the first nut 22f and the second nut 22m are preferably formed of resin. By being formed of resin, each spindle can rotate, so that it is possible to reduce the impact sound generated when each rod and nut collide. On the other hand, when the first rod 22c and the second rod 22n, or the first nut 22f and the second nut 22m are formed of resin, the first nut 22f and the second nut 22m are used when the toilet seat lifting device 10 is continuously used. However, the toilet seat lifting / lowering device 10 of the present invention can detect the failure of the drive units 24a and 24b, and the drive unit 24a and 24b are defective. When this is detected, a predetermined countermeasure can be taken.

  In the present embodiment, the handling unit 25d is configured to stop the lifting operation of the toilet seat lifting device 10 by stopping the energization of the first motor 22j and the second motor 22q. 10, the notification unit is newly provided, and the handling unit 25d notifies the user of the failure of the first drive unit 24a and the second drive unit 24b by transmitting a signal so as to emit sound or light from the notification unit. It may be a configuration.

  In the first embodiment, an arbitrary time after the seat surface of the toilet seat lifting / lowering device 10 rises, that is, the time from when the seat surface of the toilet seat lifting / lowering device 10 rises to before the toilet seat 12 becomes an unexpected inclination of the user. After the time of 1 second to 5 seconds elapses, the measurement unit 25c is configured to measure the current values Im1 and Im2 flowing to the first motor 22j and the second motor 22q. Anytime during the climb.

  In the first embodiment, the threshold values Ith1 and Ith2 may be set to the same threshold value IthA. However, since the characteristics of the flowing current value differ depending on the motor, it is possible to perform a more accurate drive unit failure detection operation by setting a threshold value for each.

  In the second embodiment, the threshold values ΔIth3 and ΔIth4 may be set to the same threshold value ΔIthB. However, since the characteristics of the flowing current value differ depending on the motor, it is possible to perform a more accurate drive unit failure detection operation by setting a threshold value for each.

  In the present embodiment, the measuring unit 25c measures the current value flowing from the first motor 22j and the second motor 22q, or the magnetic flux generated by the first magnet 22g and the second magnet 22p provided with the first spindle 22e and the second spindle 22o. However, the present invention is not limited to this, and may be configured to measure a plurality of variation parameters.

  The elements included in each of the embodiments described above can be combined as much as technically possible, and combinations thereof are also included in the scope of the present invention as long as they include the features of the present invention.

10 Toilet seat lifting device
11 Toilet bowl
12 Toilet seat
13 Support member
14a, 14b Lifting member
15 Toilet seat cradle
16 Fixing member
17a, 17b Side member
18 Toilet bowl
19a, 19b Upper arm member
19ax, 19bx, 20ax, 20bx Front fulcrum
19ay, 19by, 20ay, 20by Back fulcrum
20a, 20b Lower arm member
21a, 21b Four-bar link
22a, 22b Electric telescopic drive
22c first rod
22d first casing
22e 1st spindle
22f first nut
22g first magnet
22j 1st motor
22k first hall element
22l second casing
22m second nut
22n second rod
22o 2nd spindle
22p second magnet
22q second motor
22r Second Hall element
24a First drive unit
24b Second drive unit
25 Controller
25a Synchronization unit
25b Defect detection unit
25c Measuring unit
25d handling section
26a first action part
26b Second action part
27 Toilet seat lift switch
28 Toilet seat lowering switch
F Floor
S clearance

Claims (3)

A plurality of driving units provided at different positions, which raise and lower the toilet seat of the toilet bowl by driving,
A plurality of spindles that are rotatably connected to the plurality of driving units and that rotate to drive the driving unit;
A drive source for rotating each of the plurality of spindles;
A measurement unit that measures at least one variation parameter of the spindle and the drive source when the drive source rotates the spindle;
A defect detection unit that detects one of the plurality of drive units based on the variation parameter measured by the measurement unit;
When the defect detection unit detects a defect, a coping unit that performs a predetermined countermeasure,
With
The plurality of driving units include a first driving unit that moves up and down one end side of the toilet seat, and a second driving unit that moves up and down the other end side of the toilet seat,
The plurality of spindles includes a first spindle that drives the first driving unit and a second spindle that drives the second driving unit,
The measurement unit measures a current value flowing to the first motor and the second motor,
In the defect detection unit, a value of a current flowing to any one of the first motor and the second motor measured by the measurement unit is equal to or less than a predetermined value, and the first motor and the second motor When the value of the current flowing to the remaining one becomes equal to or greater than a predetermined value, the defect is detected.
Toilet seat lifting device. A plurality of driving units provided at different positions, which raise and lower the toilet seat of the toilet bowl by driving,
A plurality of spindles that are rotatably connected to the plurality of driving units and that rotate to drive the driving unit;
A drive source for rotating each of the plurality of spindles;
A measurement unit that measures at least one variation parameter of the spindle and the drive source when the drive source rotates the spindle;
A defect detection unit that detects one of the plurality of drive units based on the variation parameter measured by the measurement unit;
When the defect detection unit detects a defect, a coping unit that performs a predetermined countermeasure,
With
The plurality of driving units include a first driving unit that moves up and down one end side of the toilet seat, and a second driving unit that moves up and down the other end side of the toilet seat,
The plurality of spindles includes a first spindle that drives the first driving unit and a second spindle that drives the second driving unit,
The drive source comprises a first motor that rotates the first spindle and a second motor that rotates the second spindle,
The measurement unit measures a current value flowing to the first motor and the second motor,
The defect detection unit is configured such that when at least one of a change amount of the current value flowing to the first motor or a change amount of the current value flowing to the second motor measured by the measurement unit becomes equal to or greater than a predetermined value. , Detecting the defect,
Toilet seat lifting device. A plurality of driving units provided at different positions, which raise and lower the toilet seat of the toilet bowl by driving,
A plurality of spindles that are rotatably connected to the plurality of driving units and that rotate to drive the driving unit;
A drive source for rotating each of the plurality of spindles;
A measurement unit that measures at least one variation parameter of the spindle and the drive source when the drive source rotates the spindle;
A defect detection unit that detects one of the plurality of drive units based on the variation parameter measured by the measurement unit;
When the defect detection unit detects a defect, a coping unit that performs a predetermined countermeasure,
With
The plurality of driving units include a first driving unit that moves up and down one end side of the toilet seat, and a second driving unit that moves up and down the other end side of the toilet seat,
The plurality of spindles includes a first spindle that drives the first driving unit and a second spindle that drives the second driving unit,
The drive source comprises a first motor that rotates the first spindle and a second motor that rotates the second spindle,
The plurality of spindles are provided with a plurality of magnets that can rotate together with the plurality of spindles,
The measurement unit measures the amount of magnetic flux by the plurality of magnets,
The defect detection unit detects the defect when a change amount of a hole period, which is a change period of each magnetic flux amount measured by the measurement unit, is equal to or greater than a predetermined value.
Toilet seat lifting device.