JP2000203342A - Boarding/alighting device for cab-over type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply use a step and board or alight a large vehicle with no difficulty by activating a control circuit when a door switch is displaced to the open from closure of a boarding/alighting door, displacing the step to a using position from a storage position, and lifting the step from a lowered position according to the action of an operation switch. SOLUTION: A control circuit is activated when a door switch is displaced to the open from closure of a boarding/alighting door 2, and it displaces a step 3 to a using position from a storage position. The step 3 is lifted from a lowered position according to an operation switch 11. When a seat switch detects seating, the step 3 is displaced to the storage position from the using position. When the seat switch indicates seating and the door switch is displaced to the closure from open of the boarding/alighting door 2, the step 3 is displaced to the storage position from the using position, and its action is rested. When the door switch is displaced to the open from closure of the boarding/alighting door 2 while the seat switch indicates seating, the step 3 is displaced to the using position from the storage position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention is applied to an automobile. INDUSTRIAL APPLICABILITY The present invention is used as an auxiliary device that is particularly convenient for getting on and off a passenger seat of a cab-over type vehicle. The present invention relates to a device suitable for use by women, the elderly and mildly disabled persons.

[0002]

2. Description of the Related Art Hitherto, as a device used for loading and unloading luggage in a large vehicle, a lifting device in which a platform provided at the rear of the vehicle moves up and down by an electric device has been widely known.
There is also known a device that stores a table so that the lifting device does not hinder the traveling of the vehicle. On the other hand, in order to allow a physically handicapped person to get on and off a car, an electric getting on and off device for getting on and off a wheelchair is widely used. Also, a device that stores the steps in a storage position so that the steps for getting on and off does not become an obstacle during traveling of the vehicle is widely known.

[0003] A large-sized vehicle having a sliding door as a sliding door is disclosed, for example, in Japanese Utility Model Publication No. 2-37620. This was designed to prevent the door from opening outside and causing an accident, and to prevent the clothes of passengers and drivers from catching on the sliding part when the sliding door opens and closes. .

[0004]

Generally, when an occupant gets on or off a large cab-over type vehicle, the occupant grips the grip provided at the entrance and exit with his arm and lifts his body to the occupant seat by the force of his arm. Physical movement is required. To do this, you need strength to support your weight, especially suspension.
Further, in order to open a door that opens outward by a hinge and to get into a passenger seat from a step provided on the cab, an operation of twisting the body in accordance with the movement of the feet and arms is necessary.

On the other hand, in recent years, due to traffic accidents and other causes,
There are many drivers with mild disabilities remaining in their arms and lower back, etc., who have become mildly disabled. These people find it difficult to get in and out of the driver's seat of a large vehicle due to minor obstacles, even though they have no physical or technical difficulty in driving a large vehicle. For some reasons, some have been forced to abandon their profession that they have experienced.

[0006] For this purpose, the applicant's company that manufactures and sells large vehicles is required to provide a simple electric elevator at the entrance of the driver's seat, which is used for loading and unloading cargo at the rear of the vehicle. Has often been requested. Such a device is disadvantageous in that the width of the vehicle is substantially increased if the device used for loading and unloading cargo is simply provided sideways at the entrance of the passenger seat.
In addition, a lifting device in which only one person rides may have a simpler structure than that used for loading and unloading luggage. In addition, in the case of a cab-over type vehicle, not only should extra care be taken not to impede the operation when the vehicle is running, and the cab tilting should not cause an obstruction to the elevation step.

The applicant of the present invention has invented a cab-over type vehicle getting-on / off device for this purpose and has filed a patent application (Japanese Patent Application No. Hei 10-1998).
53859, unpublished at the time of filing the present application). When the device according to the invention of the prior application was manufactured and used by monitor users, opinions were heard from the users, and some requests for improvement were received from the users. There was a request that the operation be made as simple as possible and that the steps be automatically raised and lowered with a few operations. There was also a demand that the occupant should not need to continue the operation until the elevating device is retracted in the rain or snow.

The present invention has been made in such a background, and an object of the present invention is to provide an electric hoisting device for getting on and off a passenger seat of a large cab-over type vehicle. SUMMARY OF THE INVENTION It is an object of the present invention to provide a device that enables a woman, an elderly person, or a person with a slight disability in their arms and hips to easily use and easily get on and off a cab-over type vehicle. SUMMARY OF THE INVENTION An object of the present invention is to provide an electric lifting device that is easy to operate. That is, an object of the present invention is to provide a device in which the operation of the device itself is extremely simple and the operation is not forgotten or an operation error occurs. SUMMARY OF THE INVENTION An object of the present invention is to minimize operations outside a vehicle in consideration of use during rain or snow. An object of the present invention is to provide a getting-on / off device that does not cause any trouble in a running state. An object of the present invention is to provide a getting-on / off device that does not cause any trouble even when performing cab tilt.

[0009]

SUMMARY OF THE INVENTION The present invention is characterized in that an electric step-up / down mechanism for a driver to get on and off the vehicle is provided, and the step is raised and lowered by operating a switch with the doors for getting on and off. . Then, the occupant outside the door opens the door of the occupant's seat to activate the elevating device, and the occupant goes out of the occupant's seat and closes the occupant door to end the operation of the elevating device. I do.

That is, the present invention provides a door provided at an entrance of an occupant seat, a step provided at the entrance, an electric lifting mechanism provided at the step,
A handrail provided at the entrance and exit which can be grasped by a person standing at the step, a door switch for detecting the open / close state of the entrance / exit door, and an operation switch provided at a position operable by the person standing at the step; A door switch, a control circuit which takes in the state of the operation switch and drives and controls the raising / lowering mechanism, wherein the control circuit is activated when the door switch is displaced from a closed state of the entrance door to an open state and the step Means for displacing the step from the storage position to the use position, and means for raising the step from the lowered position in accordance with the operation of the operation switch.

A seat switch for detecting the seating of the occupant seat, wherein the control circuit shifts the step from the use position when the seat switch indicates seating and the door switch is displaced from an open state to a closed state of the door. Means for displacing to a storage position, wherein the entrance door is a slide door, the storage position is located at a position that does not hinder the traveling of the vehicle, and does not hinder the cab tilt, the control circuit,
Means for starting when the door switch is displaced from a closed state to an open state of the entrance door in a state where the seat switch indicates seating, and displacing the step from the storage position to the use position; and Means for lowering the step from the raised position in accordance with the operation of the operation switch after displacing from the state shown to the state without seating, and opening and closing the door after the step reaches the lowered position. Means for displacing the step to the storage position when displaced from the closed position to the closed position.

Further, an operation detection switch is provided on at least one of the inside door handle and the outside door handle of the entrance door, and the control circuit is configured to control the inside door in a state where the seat switch indicates the seating. Means for inhibiting the operation of displacing the step from the storage position when the door switch is displaced from the closed state to the open state of the entrance door after the handle is not operated or the outside door handle is operated, Mechanical means for restraining the door in an open state during a period in which the control circuit is operable, an obstacle sensor is provided on a lower surface of the step, and the control circuit is responsive to the obstacle sensor. It is preferable that the period includes means for inhibiting the descending operation of the step.

When the passenger gets on and off, the door switch is turned on when the door is opened, and the control circuit is activated by an output indicating the open state of the door. Thus, the storage mechanism is driven to move the step from the storage position to a position where the occupant can stand. Subsequently, the lifting / lowering mechanism is driven to lower the step to the use position.

When an occupant steps on the step lowered to the use position and operates an operation switch provided at a position where the operation can be performed while standing on the step, the control circuit drives a lifting / lowering mechanism to raise the step. . Thereby, the occupant can move to the occupant seat side in a stable state with the handrail held.

When the occupant sits on the seat, the seat switch is turned on, and when the door is closed, the door switch is turned off. The control circuit drives the lifting / lowering mechanism and the storage mechanism by the outputs of the seat switch and the door switch to move the step to the storage position, and stops the operation when the step moves to the storage position. Thereby, even if the operation switch is operated in a state where the entrance door is closed, the movement of the step is prohibited, and safety is ensured.

It is desirable that the entrance door is formed in a sliding manner. The steps are stored in the vehicle body so as not to exceed the vehicle width, and are stored at a position where there is no problem when performing the cab tilt. Thereby, traveling and maintenance / inspection can be performed without being restricted by storing the steps.

When the driver gets off the vehicle and opens the door with the occupant sitting in the seat, the control circuit determines that the door has been displaced from closed to open with the seat switch turned on to indicate seating. Start by the output of the door switch shown,
The storage mechanism and the lifting / lowering mechanism are driven to move the step from the storage position to the use position.

Here, when the occupant gets on the raised step, the seat switch is turned off from the on state. When the operation switch is operated to the descending side in this state, the control circuit drives the elevating / lowering mechanism according to the operation signal and moves the step from the ascending position to the descending position. When the step reaches the descent position and the occupant gets out of the step and the door is displaced from open to closed and the door switch is turned off, the control circuit drives the ascent / descent mechanism and storage mechanism by the off signal and stores the step in the storage position. Move to When the step is stored in the storage position, the getting on / off operation is paused.

When the occupant is seated, the door is closed and the steps are stored, and the door is opened from outside the vehicle, the seat switch is on and the inside door handle is turned off. Since the door was displaced from closed to open by the operation of the outside door handle without being operated, the control circuit assumed that the door was not opened by the will of the occupant sitting on the seat and took the steps. The operation of displacing from the storage position is prohibited. As a result, even if the door is opened by another person from outside the vehicle while the occupant is in the vehicle, the steps are not lowered and the safety is maintained.

When the occupant gets on the board, the correct operation is to move to the occupant seat when the step reaches the rising end, store the step, and then close the door, but the step is protruding. There is a possibility that an operation to close the door when the vehicle is in the state is performed. When such an operation is performed, the door may interfere with the steps and may be damaged. In order to avoid such an erroneous operation, the door is restricted to the open state by mechanical means during a period in which the door is open and the control circuit is operable.

Thus, even if the door is closed while the step is protruding, the door is mechanically restrained in the open state, so that the door may interfere with the step due to erroneous operation. Can be avoided.

During the step descent operation,
If there is an obstacle such as a convex portion on the road surface or a foreign matter at the descent position of the step, the obstacle sensor detects the state. The control circuit prohibits the step descent operation while the obstacle sensor is sensing the protrusion or the foreign matter. When the occupant notices the condition and the operation switch is operated to the ascending side, the control circuit drives the ascending / descending mechanism to increase the step. This allows the occupant to move the vehicle to a position without obstacles.

As described above, according to the present invention, it is possible to carry on or off the vehicle by simply operating the switch for raising or lowering the step. Therefore, the number of operations outside the vehicle is reduced, and the operation during rain or snow falls. The time can be shortened, and operation mistakes and operation errors can be eliminated. In addition, the operation is simple and it can be used easily without taking an unreasonable posture such as twisting the body when getting on and off, so even women, elderly people or occupants with mild disabilities in their arms and waist can easily do it. You can get on and off the vehicle.
In addition, this structure can be configured so as not to cause any trouble at the time of running or cab tilt.

The applicant of the present application has filed a patent application (Japanese Patent Application No.
53859, not disclosed at the time of filing the present application) In the configuration of the invention of the prior application, the vehicle is provided at a position where the door can be operated from the outside with the door open and closed, and when protruding the step at the time of getting on and storing the step after getting off the vehicle. And a second switch operated when raising or lowering a step while a passenger gets on and off, and when lowering or protruding a step while sitting in a passenger seat. There are three types of switches, a third switch to operate. On the other hand, in the configuration of the present application, only one operation switch operated by one's own intention when raising or lowering the step is provided, and all related operations are automatically performed. Therefore, the complexity is eliminated, and the possibility of erroneous operation can be eliminated.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION

[0026]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial perspective view showing a mechanical configuration of a main part of the embodiment of the present invention, FIG. 2 is a view showing an arrangement position of operation switches in the embodiment of the present invention, and FIG. 3 is an electrical diagram of a main part of the embodiment of the present invention. FIG. 3 is a block diagram illustrating a configuration.

In the embodiment of the present invention, a door 2 provided at the entrance of the passenger seat 1 and a step 3 provided at the entrance are provided.
And the electric lifting and lowering mechanism 4 provided in the step 3
And handrails 5 and 55 provided at the entrance and exit, which can be gripped by a person standing at step 3, a door switch 10 for detecting the open / close state of the entrance door 2, and a position provided at a position where a person standing at step 3 can operate. An operation switch 11, a seat switch 14 for detecting the seating of the passenger seat 1, and a door switch 1.
0, a control circuit 6 for taking in the states of the operation switch 11 and the seat switch 14 and controlling the drive of the raising / lowering mechanism 4.

The control circuit 6 is activated when the door switch 10 is displaced from the closed state to the open state of the door 2 and displaces the step 3 from the storage position to the use position. Means for raising the position 3 from the lowered position, means for displacing the step 3 from the use position to the storage position when the seat switch 14 detects seating, the seat switch 14 indicating seating, and the door switch 10 for opening and closing the door 2. Means for displacing the step 3 from the use position to the storage position when it is displaced from the closed position to a stop position, and a state in which the seat switch 14 indicates that the seat switch 14 is seated, and Means for starting when displaced and displacing step 3 from the storage position to the use position, and a state in which the seat switch 14 indicates a seated state Means for lowering the step 3 from the raised position in accordance with the operation of the operation switch 11 after being displaced to a state where there is no seat, and the door switch 10 being displaced from the opening of the door 2 to the closing after the step 3 reaches the lowered position. Means for displacing step 3 to the storage position and suspending the operation.

An operation detection switch 20 is provided on the inside door handle of the door, and the control circuit 6 includes
Step 3 is stored when the door switch 10 is displaced from the closed state to the opened state of the entrance door 2 after the outside door handle is operated without operating the inside door handle while the seat switch 14 indicates the seating. Means for inhibiting the operation of displacing from the position is included.

The operation detection switch 20 is connected to the outside
Provided on the door handle side, the inside door handle may be provided with no detection switch, or may be provided on both the inside and the outside. When two operation detection switches are provided, detection of opening / closing operation of the door 2 from outside the vehicle and detection of opening / closing operation of the door 2 from inside the vehicle can be clearly distinguished and performed.

Further, the step 3 is provided with an electric storage mechanism 7 which is displaced between a storage position where the running of the vehicle is not hindered and a use position where a person can stand in the step 3. Means for enabling the raising / lowering mechanism 4 only when the position 3 is in the use position is included.

[0032] The storage position is provided at a position that does not hinder the running of the vehicle and does not hinder the cab tilt.
A door lock actuator 40 is provided as mechanical means for restraining the door 2 in the open state during the period when the control circuit 6 is operable. An obstacle sensor 36 is provided on the lower surface of the step, and the control circuit 6 includes means for inhibiting the descending operation of step 3 during a period when the obstacle sensor 36 is sensitive.

FIG. 4 is a front view showing an external shape of the operation switch according to the embodiment of the present invention, and FIG. 5 is a sectional view of the operation switch taken along the line AA in FIG.

The operation switch 11 comprises an upper button 51, a lower button 52, and a lighting display unit 53. When the upper button 51 is operated, the control circuit 6 drives the ascending / descending mechanism 4 to move the step to the descending position. 3 is moved to the raised position. Also, when the lower button 52 is operated, the control circuit 6 drives the ascending / descending mechanism 4 to move the step 3 at the ascending position to the descending position. The lighting display unit 53 lights when the entrance door 2 is opened to indicate that the door 2 is open.

FIG. 6 is a front view showing a mounted state of the operation switch according to the embodiment of the present invention, and FIG. 7 is a sectional view taken along the line BB of FIG. 6 of the operation switch according to the embodiment of the present invention.

The operation switch 11 is attached to the outer end surface of the instrument panel 38, and is located at a position where the thumb of a hand holding the grip 37 located at a position where a person standing at step 3 can grip can be operated with a thumb. This operation switch 11
Is provided with a protective cover 39 for preventing fingers holding the grip 37 from inadvertently contacting the outer edge of the grip 37.

A part of the side surface of the protective cover 39 is fixed to the core bar 37a of the grip 37 by welding. The operation switch 11 is attached to the protective cover 39, and the outer periphery thereof is covered by a switch cover 54. Since the operation of the operation switch 11 is performed by intentionally putting the thumb inside the protective cover 39, careless contact of the finger with the operation switch 11 due to behavior other than the switch operation is prevented.

As shown in FIG. 3, the ascent / descent mechanism 4 in this embodiment has, as an electrical configuration, an ascending / descending motor 8 for performing the ascending / descending in step 3, and the control circuit 6 Forward / reverse relay 8 that switches according to
a, an upper limit switch 15 that turns off when the step 3 reaches the rising end and stops driving the elevating motor 8, and turns off when the step 3 reaches the falling end and stops driving the elevating motor 8. A lower limit switch 16 which is turned on when step 3 reaches the storage position from the rising end side and a signal indicating the position is sent to the control circuit 6.
And the first position switch 17a which is turned off when transmitted to the control circuit 6 and which is turned on when the storage position is reached from the descending end side in Step 3 to the control circuit 6. A second position switch 17b which is turned off at this time, and a buzzer 21 for notifying that a sound is sounding at the time of ascending and descending of step 3 are being provided.

The storage mechanism 7 has, as an electrical configuration, a storage motor 9 for performing protrusion and storage in step 3, a forward / reverse rotation relay 9 a for switching the rotation direction of the storage motor 9 under the control of the control circuit 6, A protruding limit switch 18 that is turned off when the 3 protrudes and stops driving the storage motor 9, and a storage limit switch 19 that is turned off when the step 3 is stored and stops driving the storage motor 9. .

The control circuit 6 comprises a computer and interface circuits corresponding to a plurality of switches and relays. Software for controlling the operation described below is mounted on the computer. This software can be created by a person having ordinary knowledge based on the following operation description, and detailed disclosure thereof will be omitted.

Next, the operation of the embodiment of the present invention configured as described above will be described.

First, the operation during boarding will be described with reference to FIG. When the door 2 shown in FIG. 9 is opened from the closed state, the door switch 10 is turned on. The control circuit 6 is activated by this ON signal and restrains the door 2. As a result, when the door 2 is in the open state, the door 2 is not closed unless step 3 is stored, and it is avoided that the door 2 interferes with the step 3 protruding. When the door switch 10 is turned on, the lighting indicator 53 of the operation switch 11 is turned on, and the door 2 is turned on.
Indicates that is open. Here, the control circuit 6
Drives the storage motor 9 by switching the forward / reverse rotation relay 9a to the side where the storage motor 9 projects step 3.

When the step 3 protrudes to the use position, the protruding limit switch 18 is turned off,
The control circuit 6 stops the driving of the storage motor 9 in response to the OFF signal, switches the forward / reverse rotation relay 8a to the side where the step 3 descends, and drives the elevating motor 8. The lower limit switch 16 is turned off when the step 3 reaches the descending position by driving the lift motor 8, and the control circuit 6 stops driving the lift motor 8 based on this signal. FIG. 10 shows the position of step 3 at that time. The protruding operation and the descending operation in step 3 can be performed simultaneously in parallel.

When the occupant steps on step 3, the operation switch 11
When the upper button 51 is operated, the control circuit 6 switches the forward / reverse rotation relay 8a to the side where the step 3 is raised, and drives the lift motor 8. The step 3 is raised by the drive of the lifting motor 8. At the time of the ascent in step 3, the first position switch 17a is temporarily turned on, and the second position switch 17b is temporarily turned on at short intervals, but the door switch 10 is turned on. Since the sheet switch 14 is in the OFF state and the storage condition of step 3 is not satisfied, the control circuit 6 ignores this and raises step 3.

When the step 3 reaches the ascending position, the upper limit switch 15 is turned off, and the control circuit 6 stops driving the elevating motor 8 by this off signal. FIG.
Reference numeral 1 denotes the position of step 3 at that time.

The occupant moves to the occupant's seat 1 from step 3 when the occupant reaches the ascending position, and when the occupant is seated in the occupant's seat 1, the seat switch 14 is turned on. With this output, the control circuit 6
Releases the restraint on the door,
Is invalidated. Here, when the door 2 is closed by the inside door handle, the operation detection switch 20 is temporarily turned on, and the control circuit 6 outputs
The forward / reverse rotation relay 8a is switched to the side where step 3 descends, and the elevation motor 8 is driven.

Step 3 is performed by driving the lift motor 8.
Is lowered to reach the storage position, the second position switch 17b is temporarily turned on, and then the first position switch 17a is temporarily turned on. At this time, since the door switch 10 and the seat switch 14 are in the ON state and the condition for storing the step 3 is satisfied, the control circuit 6 stops the driving of the elevating motor 8,
The forward / reverse rotation relay 9a is switched to the side where the step 3 is stored, and the storage motor 9 is driven.

By driving the storage motor 9, step 3 is performed.
Is drawn into the storage position as shown in FIG. When step 3 reaches the storage position, the storage limit switch 19 is turned off. The control circuit 6 stops driving the storage motor 9 in response to the OFF signal. When the storage limit switch 19 is turned off, the control circuit 6 stops its operation. Therefore, in the state where the entrance door 2 is closed, even if the operation switch 11 is operated, the moving operation in step 3 is not performed. At this time, the lighting display section 53 of the operation switch 11 goes out.

When the occupant is seated in the occupant seat 1 and the door 2 is closed by the inside door handle, the door 2 may be opened from outside the vehicle. At this time, since the seat switch 14 is in the ON state and the door switch 10 is in the OFF state, even if the door switch 10 is changed to the ON signal, the control circuit does not mean that the occupant's door 2 was opened by the occupant's intention. Then, the operation pause state of Step 3 at the storage position is continued. As a result, the door 2
Is opened, the descent of step 3 is suppressed and the safe state is maintained.

Next, the operation at the time of getting off the vehicle will be described with reference to FIG. When the occupant is fully seated in the occupant seat 1 and the door 2 is fully opened manually, the door switch 10 is turned on and the operation detection switch 20 is temporarily turned on. As a result, the control circuit 6 is activated to restrain the door 2. At this time, the lighting display section 53 of the operation switch 11 lights up.

Here, the control circuit 6 switches the forward / reverse rotation relay 9a to the side where step 3 is protruded, and drives the storage motor 9. Step 3 is protruded by the driving of the storage motor 9. When step 3 reaches the protruding position, the protruding limit switch 18 is turned off. The control circuit 6 stops the driving of the storage motor 9 in response to the OFF signal, switches the forward / reverse rotation relay 8a to the side where the step 3 is raised, and drives the lifting motor 8. The protruding operation and the ascending operation in step 3 can be performed simultaneously in parallel.

The step 3 is raised by the drive of the lifting motor 8, and when the upper position is reached, the upper limit switch 1
5 is turned off, and the drive of the elevating motor 8 stops. When the occupant rides on step 3, the seat switch 14 is turned off, and when the lower button 52 of the operation switch 11 is operated by the occupant, the control circuit 6 switches the forward / reverse relay 8a to the side where step 3 descends, and the elevating motor 8 And step 3 is lowered.

When step 3 descends, the second position switch 17b is temporarily turned on, and then the first position switch 17b is temporarily turned on. And door switch 10
Is in the ON state, the storage condition of step 3 is not satisfied, so the control circuit 6 ignores this and drops step 3. When step 3 reaches the lowered position, the lower limit switch 16 is turned off, and the control circuit 6
Stops the drive of the elevating motor 8 in response to the OFF signal, and releases the restraint of the door 2.

When the occupant gets out of step 3
When the door 2 is closed by the door switch, the door switch 10
Is turned off. The control circuit 6 switches the forward / reverse rotation relay 8a to the side where step 3 is raised by this signal, and drives the lifting motor 8. The step 3 is raised by the drive of the elevation motor 8, and when the storage position is reached, the first position switch 17a is temporarily turned on, and then the second position switch 17b is temporarily turned off. .

At this time, since the door switch 10 is in the OFF state and the storage condition of step 3 is satisfied, the control circuit 6 stops the drive of the lifting / lowering motor 8 and the forward / reverse rotation relay 9a
Is switched to the side where step 3 is stored, and the storage motor 9 is driven. When the storage motor 9 is driven, step 3 is pulled in, and when the storage limit switch 19 comes into contact with the storage limit switch 19 to be turned off, the drive of the storage motor 9 is stopped. Thereby, step 3 is stored in the vehicle body as shown in FIG. The control circuit 6 ends the operation. At this time, the lighting display section 53 of the operation switch 11 goes out.

At the time of ascending or descending, and at the time of protruding or storing at step 3, the buzzer 21 is sounded to notify that it is in operation.

When step 3 is lowered, if there is an obstacle under the road, such as a bump on the road surface or a foreign matter, the obstacle sensor 36 contacts the obstacle and an ON signal is sent to the control circuit 6. Sent out. Upon receiving the output of the obstacle sensor 36, the control circuit 6 immediately prohibits the descending operation of step 3. When the operation switch 11 is operated upward in this state, the control circuit 6 drives the elevating motor 8 to execute step 3.
To rise. Thus, the vehicle can be stopped at a position away from the obstacle.

In the present embodiment, an example in which both the raising and lowering mechanism 4 and the storage mechanism 7 are provided has been described. However, in the case of a vehicle type which does not hinder running even if the storage in step 3 is not performed, the storage mechanism 7 is used. It can be a structure that does not have.

In this embodiment, the sliding door has been described as an example. However, the present invention can be mounted on a vehicle having a door that is opened outward by a hinge, and the same effect can be obtained.

[0060]

As described above, according to the present invention, it is possible to carry out getting on or off by simply operating the switch for raising or lowering the step. In this case, the operation time can be shortened, and operation mistakes and operation errors can be eliminated. In addition, since the operation is simple and it can be used easily without taking an unreasonable posture such as twisting the body at the time of getting on and off, even a driver with a slight obstacle in his arms and waist can get on and off the vehicle without difficulty be able to. This structure can be realized so as not to hinder running or cab tilting.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a mechanical configuration of a main part of an embodiment of the present invention.

FIG. 2 is a view showing an arrangement position of operation switches in the embodiment of the present invention.

FIG. 3 is a block diagram showing an electrical configuration of a main part of the embodiment of the present invention.

FIG. 4 is a front view showing the external shape of the operation switch according to the embodiment of the present invention.

FIG. 5 is a sectional view of the operation switch according to the embodiment of the present invention, taken along the line AA in FIG. 5;

FIG. 6 is a front view showing a mounted state of the operation switch according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view of the operation switch according to the embodiment of the present invention taken along line BB shown in FIG. 6;

FIG. 8 is a view for explaining the flow of operations and operations during boarding in the embodiment of the present invention.

FIG. 9 is a view showing a state in which the doors of the embodiment of the present invention are closed.

FIG. 10 is a diagram showing a state in which a step is lowered in the embodiment of the present invention.

FIG. 11 is a view showing a state in which the steps in the embodiment of the present invention have risen.

FIG. 12 is a diagram showing a flow of operations and operations at the time of getting off in the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 passenger seat 2 door 3 door 4 step up / down mechanism 5, 55 handrail 6 control circuit 7 storage mechanism 8 elevating motor 8 a, 9 a forward / reverse relay 9 storage motor 10 door switch 11 operation switch 14 seat switch 15 upper limit switch 16 lower limit Switch 17a First position switch 17b Second position switch 18 Protrusion limit switch 19 Storage limit switch 20 Operation detection switch 21 Buzzer 36 Obstacle sensor 37 Grip 37a Core bar 38 Instrument panel 39 Protective cover 40 Door lock actuator 51 Up button 52 Down button 53 Lighting indicator 54 Switch cover

Claims (8)

[Claims] An entrance door provided at an entrance of a passenger seat;
Detecting a step provided at the entrance, an electric lifting mechanism provided at the step, a handrail provided at the entrance which can be grasped by a person standing at the step, and an open / close state of the entrance door. A door switch to be operated, an operation switch provided at a position that can be operated by a person standing in the step, and a control circuit that takes in the state of the door switch and the operation switch and controls the drive of the ascent / descent mechanism. Means for activating when the door switch is displaced from a closed state to an open state of the door, and displacing the step from a storage position to a use position, and raising the step from a lowered position according to an operation of the operation switch. Means for getting on and off the cab-over type vehicle. 2. The vehicle according to claim 1, further comprising a seat switch configured to detect a seat of the occupant seat, wherein the control circuit uses the step when the seat switch indicates a seat and the door switch is displaced from an open state to a closed state of the door. The cab-over type vehicle getting-on / off device according to claim 1, further comprising means for displacing the vehicle from the position to the storage position. 3. The cab-over type vehicle getting-on / off device according to claim 1, wherein the doors are sliding doors. 4. The cab-over type vehicle getting-on / off device according to claim 1, wherein the storage position is a position that does not hinder running of the vehicle and does not hinder cab tilt. 5. The control circuit is activated when the door switch is displaced from a closed state to an open state of the door in a state where the seat switch is in a seated state, and displaces the step from a storage position to a use position. Means for causing the step to descend from the raised position in accordance with the operation of the operation switch after the seat switch is displaced from the state indicating seating to the state without seating; and Means for displacing the step to the retracted position when the door switch is displaced from open to closed of the entrance door. 6. An operation detection switch is provided on at least one of an inside door handle and an outside door handle of the entrance door, and the control circuit is configured to control the inside door handle in a state where the seat switch indicates a seat.
Means for prohibiting an operation of displacing the step from the storage position when the door switch is displaced from a closed state to an open state of the entrance door after the door handle is not operated or the outside door handle is operated. Item 6. A cab-over type vehicle getting-on / off device according to Item 5. 7. The cab-over type vehicle getting-on / off device according to claim 1, further comprising mechanical means for restraining the doors in an open state during a period in which the control circuit is operable. 8. The method according to claim 1, wherein an obstacle sensor is provided on a lower surface of the step, and the control circuit includes means for inhibiting the descending operation of the step while the obstacle sensor is sensitive. A cab-over type vehicle getting on and off device.