JPH11197186A - Chair elevating and lowering device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair elevating and lowering device for a vehicle capable of preventing backlash after stoppage. SOLUTION: In the case that an elevating and lowering switch is operated to an elevating side, an elevating operation is started until the elevating and lowering switch is released or an intermediate switch for deceleration is operated (S3). When a seat is elevated to a position near elevation stoppage and the intermediate switch for the deceleration is operated (S4), the elevating speed of the seat is reduced (S5). Then, when the seat is elevated to an elevation stoppage position and a storage completion limit switch is operated, the measurement of prescribed time is started by operating a timer (S7), and when the measurement of the prescribed time is ended (S8), a stoppage processing is performed (S2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular chair elevating device for moving a disabled person, an elderly person, or the like into a passenger compartment while sitting on a seat.

[0002]

2. Description of the Related Art Conventionally, as a vehicle chair lifting / lowering device for raising a seat from a position outside a vehicle compartment to a vehicle interior, Japanese Patent Publication No. 4-6 / 1994 has been used.
One disclosed in Japanese Patent No. 7458 is known.

[0003] The vehicular chair elevating device includes a lifter provided on a floor of a vehicle body, and a support base supported by an arm of the lifter and supporting a seat. The lifter includes a turning operation switch for turning the arm between a position outside the vehicle compartment and a driver's seat position, and an elevating switch for moving the arm up and down, and operating both switches in an appropriate order. Thus, the seat supported by the support table can be moved from outside the vehicle compartment to the driver's seat.

[0004]

However, the vehicular chair lifting and lowering device does not include a detecting means for detecting that the seat has been raised to the lifting stop position, and the seat reaches the lifting stop position. In such a case, the operation of the lift switch must be stopped to release a great load applied to the arm for moving the seat upward.

[0005] In order to eliminate such complication, a detection switch is provided which is activated when the seat reaches the lifting stop position, and the drive of the arm is stopped based on the operation of the detection switch. Conceivable. in this case,
In order to reliably prevent an overload on the arm, it is common to set the mounting position of the detection switch so that the detection switch is activated immediately before the arm reaches the upper movement limit position. .

However, in this case, the arm must be stopped accurately at the upper movement limit position in order to prevent rattling of the arm after stopping, and the arrangement of the detection switch and the arm A great deal of trouble is required in assembling the lifter, such as the state of attachment.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has as its object to provide a vehicular chair elevating device capable of preventing rattling after stopping. .

[0008]

According to a first aspect of the present invention, there is provided a vehicle chair lifting / lowering apparatus.
When the switch is operated, it is driven in the upward operation direction,
A drive unit having a drive mechanism for raising the sheet to the lifting stop position, and a detection unit installed in the drive unit for detecting a driving state of the drive mechanism and detecting that the sheet has been raised to the lift stop position. And an ascending drive continuation means for continuing to drive the drive mechanism for a predetermined time from the time when the detecting means detects that the sheet has risen to the ascending stop position.

That is, when a switch is operated to drive a drive mechanism in the drive unit and the sheet is raised to the lifting stop position by the drive mechanism, the detecting means provided in the drive unit causes the drive mechanism to drive the drive mechanism. A state is detected to detect that the sheet has been raised to the lift stop position. Then, the ascending drive continuation means continues the drive of the drive mechanism for a predetermined time from the time when the detecting means detects the ascent stop position, so that the drive mechanism moves to the movement limit position in the ascending operation direction. Then, after the drive mechanism is stopped, rattling of the drive mechanism in the upward operation direction is prevented.

According to a second aspect of the present invention, the driving mechanism is constituted by an arm rotatably provided on the driving unit, and the seat is supported at a free end of the arm. Then, the detection means is constituted by a detection switch attached to the drive unit and operated by detecting that the arm has reached the detectable area while raising the sheet with the upright of the arm.

That is, when the switch is operated,
An arm rotatably provided on the drive unit is driven in the upright direction, and the sheet supported by the free end of the arm is raised. Eventually, the sheet is raised to the lifting stop position, and reaches a detectable area of a detection switch provided in the drive unit. Then, when the detection switch is operated, the ascending drive continuation means continues the rotation of the arm for a predetermined time from the time when the detecting means detects the ascent stop position. Is moved to the movement limit position. This prevents the arm from rattling toward the rising direction after the arm is stopped, as described above.

Furthermore, in the vehicle chair elevating device according to the third aspect, a position near the ascending stop is set near the ascending and stopping position and on a passage of the sheet ascending to the ascending and stopping position. When the sheet to be lifted reaches the position near the lifting stop, a speed reducing means for reducing the speed of lifting the sheet is provided.

That is, the sheet lifted by the switch operation reaches the position near the lifting stop before reaching the lifting stop position, and its rising speed is reduced by the speed reduction means. Therefore, the sheet reaches the rising stop position,
When the drive of the drive mechanism is continued for a predetermined time by the ascending drive continuation means, an impact when the drive mechanism reaches the movement limit position is suppressed.

In addition, in the vehicle chair elevating device according to the fourth aspect, the seat lifting operation based on the switch operation is invalidated when the seat to be raised reaches the position near the lifting stop. Means for ascending continuation.

That is, from the time when the sheet raised by the switch operation reaches the position near the lifting stop to the time when the predetermined time elapses after the sheet reaches the lifting stop position, the sheet of the sheet based on the switch operation is moved. Since the rising stop operation is invalidated by the rising continuation means, the stop operation of the seat by the switch becomes impossible. Therefore, the sheet is prevented from being stopped between the position near the lifting stop and the position near the lifting stop position.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a vehicular chair lifting / lowering device 1 according to the present embodiment. The vehicular chair lifting / lowering device 1 is disposed near a doorway on a side portion of a vehicle body and has a seat 2.
In the vehicle interior I in the vehicle running direction, the turning state in which the vehicle is turned in the direction of the entrance and exit, and the vehicle is projected out of the vehicle interior O through the entrance and exit, and as shown in the figure, to the vicinity of the ground E It is configured to be able to form a lowered state that is lowered.

That is, the chair lifting device 1 for a vehicle includes:
A base bracket 6 fixed to the floor panel 5, a turning device 7 provided on the base bracket 6, and a pair of right and left slide rails provided on the turning device 7 and extending in the vehicle longitudinal direction in the normal state. 8 and an elevating unit 9 as a drive unit supported on both slide rails 8 via sliders. The elevating unit 9 includes a pair of left and right arm mount brackets 11 supported on the slide rail 8 via the slider, and a pair as a drive mechanism rotatably provided on a side portion of the both arm mount brackets 11. The upper arm 12 and the lower arm 13 to be formed, and the left and right lower arms 1
3, a lower arm cross member 15 bridging the plate 14 provided on each of the three, a pair of side links 16 one end of which is pivotally supported by the plate 14, and both side links 16 and both the arm mount brackets 11. And a front arm cross member 18 bridged to the facing front arm 17.

The front arm cross member 18 includes
One end of a hydraulic actuator 21 for rotating the upper arm 12 and the lower arm 13 is fixed, and a piston rod 22 that is extended and contracted by the actuator 21 is connected to the lower arm cross member 15. A free end of the upper arm 12;
At the free end of the lower arm 13, a sheet holder 23 is provided.
The sheet 2 is placed and fixed on the sheet holder 23.

By operating the actuator 21, the upper arm 12 and the lower arm 13, which are tilted sideways and maintained at the tilt position L,
As shown by a dashed line in the drawing, the seat holder 2 is rotated to the standing position H in the vehicle interior I, and is
The seat 2 fixed to 3 is configured to be able to rise from a descent stop position near the ground E shown in FIG. 1 to an ascent stop position above the floor 5 (see FIG. 3).

As shown in FIG. 2, the lower arm 13 is provided with an intermediate switch 31 for deceleration. The intermediate switch 31 for deceleration protrudes forward and backward.
Projector 32 operating in contact with upper arm 12
Are fixed so as to protrude toward the upper arm 12 side. As shown in FIG. 3, a storage completion limit switch 33 is attached to the plate 14, and the storage completion limit switch 33 protrudes so as to be able to advance and retreat, and operates by contacting the upper arm 12. Is fixed so as to project toward the upper arm 12 side.

When the upper arm 12 and the lower arm 13 are rotated to the upright position H, and the seat 2 reaches the raising / stopping position shown in FIG. The storage position of the storage completion limit switch 33 is set so that the storage switch 34 comes into contact with the upper arm 12 to operate. In addition, the intermediate switch 31 for deceleration is rotated to a position M near the standing position H where the upper arm 12 and the lower arm 13 are located before the standing position H, and the seat 2 is stopped at the rising position. The deceleration intermediate position is set so that the projecting element 32 comes into contact with the upper arm 12 when it reaches the position near the ascending stop position shown in FIG. The mounting position of the switch 31 is set.

FIG. 4 is a block diagram of a control device 41 for controlling the lifting unit 9.

The control device 41 controls the first and second motors 42 and 43 for controlling the hydraulic pressure in the actuator 21 when the lifting and lowering unit 9 is operated by extending and retracting the piston rod 22 from the actuator 21. A first and second motors 42 and 43 for controlling power distribution;
And a power supply 44 for supplying electric power to both motors 42 and 43, a motor drive block 45 for controlling energization and an energizing direction to both motors 42 and 43, and first and second motors 42 and 43. And a series / parallel switching block 46 for switching the connection state of the two in series or in parallel.

The storage completion limit switch 33 is connected to the motor drive block 45 via a timer block 51 for measuring a predetermined time. , 43 are cut off after a predetermined time has passed. The timer block 51 is connected to an up / down switch 53 and a deceleration intermediate switch 31 via a switch holding block 52. From the time when the deceleration intermediate switch 31 is activated, measurement by the timer block 51 is started. Until the operation is completed, the stop operation of the two motors 42 and 43 based on the operation of the elevation switch 53 is invalidated.

The deceleration intermediate switch 31 is connected to the series / parallel switching block 46. The motor is used for a period from when the deceleration intermediate switch 31 is actuated to when the measurement by the timer block 51 is completed. First motor 42 controlled by drive block 45
And the second motor 43 are connected in series.

That is, the first and second motors 42, 4
The motor drive block 45 for controlling the state of current supply to the motor 3
As shown in the circuit diagram of FIG.
The first and second members that are turned on when the is operated on the ascending side
Lifting control relays 61 and 62 and the lifting switch 53
The first and second switches that are turned on when the button is operated on the descending side
Lowering control relays 63 and 64 are provided. The first
Ascending control relay 61 and first descending control relay 63
Is configured to control the state of energization of the first motor 42, and to rotate the first motor 42 forward / reversely and stop. The second raising control relay 62 and the second lowering control relay 64 are configured to control the state of energization of the second motor 43, and to rotate the second motor 43 forward / reverse. And stop.

The series / parallel switching block 46 includes a first switching relay 71 and a second switching relay 72 that are turned on when the intermediate switch 31 for deceleration is activated. Is configured to control the connection state of the terminal of the first motor 42, and the second switching relay 72 is configured to control the connection state of the terminal of the second motor 43. Thus, the first and second motors 42 and 43 connected in parallel to the power supply in normal times are configured to be connected in series when the intermediate switch 31 for deceleration is operated.

The switch holding block 52 includes an energization holding relay 81 that is turned on when the intermediate switch 31 for deceleration is operated.
Are turned on, the first raising control relay 61 for controlling the power supply to the first motor 42 and the second for controlling the power supply to the second motor 43 irrespective of the state of the lift switch 53. And the ascending control relay 62 are forcibly turned on.

The timer block 51 comprises a timer switch 85 for starting the measurement of a predetermined time when the storage completion limit switch 33 is operated. Is
While the ON operation of the first and second lift control relays 61 and 62 is forcibly continued, when the measurement of the predetermined time is completed, the first and second lift control relays 61 and 6 are stopped.
2 is turned off, and the first and second motors 42 and 43 are turned off.
Is stopped, and a brake state is set.

In the present embodiment having the above-described structure, as shown in FIG. 1, the seat 2 at the descent stop position near the ground E is moved upward from the floor 5 as shown in FIG. The operation of the vehicular chair lifting / lowering device 1 at the time of ascent will be described with reference to a flowchart shown in FIG. 6 and a timing chart shown in FIG.

That is, when the elevating switch 53 is not operated in step S1, the actuator 21
While the first and second motors 42 and 43 are in the brake state (S2), if the up / down switch 53 is operated to the up side, the up / down switch 53 is released or the deceleration intermediate switch is turned on. The ascent operation is started until 31 operates (S3). Specifically, as shown at a timing T1 in the timing chart of FIG. 7, when the elevation switch 53 is operated to the ascending side, the first and second elevation control relays 61 and 62 are turned on, The first and second motors 42 and 43 are connected in parallel to the power supply and rotate at high speed. Thereby, the upper arm 12 and the lower arm 13 of the elevating unit 9 are rotated in the upright direction, and the seat 2 supported by the two arms 12, 13 is raised.

Then, the seat 2 is raised to the position near the lifting stop shown in FIG. 2, the arms 12 and 13 supporting the sheet 2 reach the standing position M, and the deceleration intermediate switch 31 is activated. In this case (S4), the ascending speed of the seat 2 is reduced (S5). That is, as shown at timing T2 in the timing chart of FIG. 7, when the intermediate switch for deceleration 31 is operated, the first and second switching relays 71 and 72 are turned on, and the first and second switching relays 71 and 72 are turned on. The two motors 42 and 43 are connected in series to the power supply, and both motors 42 and 43 are rotated at a low speed. Then, the rotation speed of the upper and lower arms 12 and 13 by the actuator 21 decreases, and the lifting speed of the seat 2 decreases.

At this time, when the intermediate switch 31 for deceleration is turned on, the energization holding relay 81 is turned on to form a closed circuit that bypasses the up / down switch 53. , Or more specifically, as shown at timing T3, even if the elevating switch 53 is turned off, energization to the first and second ascending control relays 61 and 62 is continued. At the same time, the rotation of the first and second motors 42 and 43 is continued, and the rotation of the arms 12 and 13 and the lifting of the seat 2 are continued.

Next, the seat 2 is raised to the lifting stop position shown in FIG. 3, the arms 12, 13 supporting the seat 2 reach the upright position H, and the storage completion limit switch 33 is operated. In this case, the timer is operated to start measurement of a predetermined time (S7), and when the measurement of the predetermined time is completed (S8), a stop process is performed (S2). That is, as shown at timing T4 in the timing chart of FIG. 7, when the storage completion limit switch 33 is activated, the timer 85a of the timer switch 85 starts measuring a predetermined time, and the timer switch 8
5 keeps the ON state of the interlock switches 85b and 85c of the timer switch 85 until the measurement of the predetermined time is completed, and continues the driving by the first and second motors 42 and 43 for the predetermined time.

When the timer switch 85 finishes measuring the predetermined time, the timer switch 85 turns off the interlock switches 85b and 85c as shown at timing T5. Then, the power supply to the first and second ascending control relays 61 and 62 is cut off, the first and second motors 42 and 43 are stopped, and the brake state is maintained. Thus, the rotation of the upper arm 12 and the lower arm 13 of the lifting unit 9 is stopped, and the lifting of the sheet 2 supported by the two arms 12, 13 is also stopped. Also, at this time, since the power supply to the power supply holding relay 81 is also cut off, the power supply to the first and second switching relays 71 and 72 is cut off when the power supply holding relay 81 is turned off. A normal connection state is established in which the second motors 42 and 43 are connected in parallel to the power supply.

As described above, in the vehicle chair lifting device 1, the seat 2 reaches the lifting stop position,
Upper and lower arms 12, which raise the seat 2,
13 reaches the standing position H and the storage completion limit switch 3
3 is operated, the first and second motors 42 and 43 of the actuator 21 that drives the arms 12 and 13 are driven for the predetermined time, and the two arms 12 and 13 are driven.
The rotation of the 13 in the upright direction can be continued for a predetermined time. Thereby, the arms 12 and 13 can be moved to the movement limit position in the rising direction, and the both arms 12 and 13 rattle toward the rising direction and are driven by the arms 12 and 13. It is possible to prevent rattling of the seat 2 at the rising stop position.

Therefore, after the elevating unit 9 is stopped, it is possible to prevent rattling between the arms 12, 13 and the seat 2 which may occur due to an assembly error of the arms 12, 13 and the like. 9 Adjustment work after assembly can be simplified. After the storage completion limit switch 33 for detecting that the seat 2 has reached the lifting stop position is activated, the two arms 1
Since the rotations of the storage switches 2 and 13 are continued for a predetermined time, even if the mounting position of the storage completion limit switch 33 is misaligned, it can be absorbed. Therefore, the adjustment of the mounting position of the storage completion limit switch 33 can be simplified.

Further, from the point in time when the sheet 2 reaches the position near the lifting stop shown in FIG. As shown at timing T5 from T2, the rotation speed of both arms 12, 13 is reduced, and after the arms 12, 13 reach the upright position H, the rotation is continued for the predetermined time. By doing
Even when the arms 12 and 13 collide with a stopper or the like of the elevating unit 9, the impact can be suppressed. Therefore, as in the case where the arms 12 and 13 collide with the stopper of the elevating unit 9 without being decelerated, excessive reinforcement measures for the elevating unit 9 and the stopper are not required.

Further, as shown at a timing T3 in FIG. 7, the arms 12 and 13 are
From the time when the position of the seat 2 is reached, until the predetermined time elapses after reaching the standing position H, the raising and lowering operation of the seat 2 based on the operation of the raising and lowering switch 53 is invalidated. The stop operation of the seat 2 due to the above becomes impossible. As a result, the section from the vicinity of the ascending stop to the ascending stop position where the seat 2 may move to the ascending stop position due to inertia and the arms 12, 13 may reach the upright position H. Inadvertent stop of the sheet 2 in the above can be prevented beforehand.

Further, it is possible to prevent a problem that the operator who operates the lifting / lowering switch 53 stops the seat 2 by mistake before reaching the lifting stop position, and cannot move to the next operation.

In this embodiment, after detecting the operation of the storage completion limit switch 33, the rotation of each of the arms 12 and 13 is continued for a predetermined time, and
The rattle of both arms 12 and 13 was prevented.
By stopping the motors 42, 43 when the current, voltage, or brush noise to each of the motors 42, 43 for driving the motor is detected, the storage completion limit switch 33 can be eliminated.

Also, by eliminating the brakes when the motors 42 and 43 are stopped, the two arms 1
The rotations of the arms 2 and 13 can be continued by inertia, and thus the rattling of the arms 12 and 13 can be reduced.

Further, in deceleration of each of the motors 12, 13, not only switching between the serial connection or the parallel connection of both motors 12, 13 but also adopting PWM control, the rotational speed has a degree of freedom. Can be made.

In this embodiment, each of the arms 12, 13 is provided by using a hydraulic actuator 21.
Although the case where the arm 12 is rotated has been described as an example, the invention is not limited to the hydraulic type, and the arms 12 and 13 may be rotated by another type of actuator 21.

[0045]

As described above, in the vehicle chair elevating device according to the first aspect of the present invention, the driving mechanism which is driven in the elevating operation direction and elevates the seat to the elevating stop position includes:
Since the drive is continued for a predetermined time by the ascending drive continuation means, the drive mechanism can be moved to the movement limit position in the ascending operation direction. Thus, it is possible to prevent rattling of the driving mechanism in the upward operation direction after stopping, and to prevent rattling of the sheet driven by the driving mechanism. Therefore, when the driving mechanism is stopped, the rattling of the driving mechanism and the seat, which may occur due to an assembling error of the driving unit, can be prevented, so that adjustment work after assembling the driving unit is simplified. can do.

Further, in the vehicle chair elevating device according to the second aspect, the arm which is driven in the erecting direction and raises the seat to the lifting stop position is continuously driven for a predetermined time by the raising drive continuation means. The arm can be driven to the movement limit position in the upward operation direction. Thus, it is possible to prevent the arm from rattling in the erecting operation direction after stopping, and it is possible to prevent the seat driven by the arm from rattling. Also,
When the arm is stopped, rattling of the arm and the seat, which may occur due to an error in assembling the drive unit, can be prevented as in the case of the first aspect.

After the detection switch for detecting that the sheet has reached the lifting stop position is operated, the driving of the arm is continued for a predetermined time, so that the mounting position of the detection switch is shifted. However, this can be absorbed. Therefore, adjustment of the mounting position of the detection switch can be simplified.

Furthermore, in the vehicle chair elevating device according to the third aspect, the seat raised by the switch operation reaches the position near the ascending stop before reaching the ascending stop position, and the ascending speed is reduced by the speed reduction means. Therefore, when the sheet reaches the lift stop position and the drive of the drive mechanism is continued for a predetermined time by the lift drive continuation unit, it is possible to suppress an impact when the drive mechanism reaches the movement limit position. Therefore, as in the case where the drive mechanism reaches the movement limit position without being decelerated, excessive reinforcement measures for the drive mechanism are not required.

In addition, in the vehicle chair elevating device according to the fourth aspect, the seat raised by the switch operation reaches the lift stop position from the time when the seat reaches the lift stop vicinity position, and then moves to the predetermined position. Until the passage of time, the lifting operation of the seat based on the switch operation is invalidated by the lifting continuation means, so that the operation of stopping the seat by the switch becomes impossible. Thus, it is possible to prevent the sheet from being inadvertently stopped in a section from the vicinity of the ascending stop position to the ascending stop position side where the drive mechanism may reach the ascending stop position due to inertia.

Further, it is possible to prevent a situation in which the operator who operates the switch stops the sheet by mistake before reaching the ascent stop position, and cannot move to the next operation.

[0051]

[Brief description of the drawings]

FIG. 1 is a side view showing the present embodiment.

FIG. 2 is a side view showing a state in which the sheet has been raised to a position near a lifting stop in the embodiment.

FIG. 3 is a side view showing a state in which the sheet is raised to a lifting stop position in the embodiment.

FIG. 4 is a block diagram showing a control device of the embodiment.

FIG. 5 is a circuit diagram showing a control device of the embodiment.

FIG. 6 is a flowchart showing an operation of the embodiment.

FIG. 7 is a timing chart showing the operation of the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle chair lifting device 2 seat 9 lifting unit 12 upper arm (drive mechanism) 13 lower arm (drive mechanism) 21 actuator 31 deceleration intermediate switch 33 storage completion limit switch (detection switch) 46 series / parallel switching block 51 timer block 52 switch Holding block

Claims (4)

[Claims] 1. A driving unit having a driving mechanism that is driven in a raising operation direction when a switch is operated to raise a sheet to a lifting stop position, and is installed in the driving unit and the driving state of the driving mechanism. Detecting means for detecting that the sheet has risen to the ascending stop position, and driving the drive mechanism for a predetermined time from when the detecting means detects that the sheet has risen to the ascending stop position. A vehicle chair lifting / lowering device comprising: a rising drive continuation unit for continuing the driving. 2. The driving mechanism is constituted by an arm rotatably provided on the driving unit, the sheet is supported on a free end of the arm, and the sheet is raised as the arm stands. 2. The vehicle chair lift according to claim 1, wherein the detection unit is configured by a detection switch attached to the drive unit and operated by detecting that the arm has reached a detectable area. apparatus. 3. In the vicinity of the lifting stop position, on a passage path of the sheet that is raised to the lifting stop position,
3. A deceleration means for setting a position near the ascending stop and providing a decelerating means for reducing a rising speed of the sheet when the sheet to be lifted reaches the position near the ascending stop. Vehicle chair lifting device. 4. A lifting continuation means for invalidating the lifting stop operation of the sheet based on the switch operation from the time when the sheet to be raised reaches the position near the lifting stop. 4. The vehicle chair lifting / lowering device according to 1, 2, or 3.