JPH0675908U - Automatic stepping device for vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] Easily get on and off the cab by automatically raising and lowering the steps. A movable step 7 located below a door on the side of the vehicle, a cylinder 8 for raising and lowering the movable step 7, a switch 16 for detecting opening / closing of the door 2, a switch 15 for detecting seating on a seat, and a movable step. The switch 18 for detecting that the passenger has moved to the vehicle, the operation switch 17 for the movable step, and the detection result of the seating and the opening / closing of the door are used to judge whether the passenger is getting on or off, and the passenger is on the movable step 7,
Controller 2 for raising or lowering movable step 7
Equipped with 0.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a step device that automatically moves up and down in a large vehicle such as a truck.

[0002]

[Prior art]

 For getting on and off a driver's seat at a high position such as a large truck, a step is attached to the lower side of the cab as disclosed in Japanese Utility Model Laid-Open No. 63-201849.

FIG. 12 shows a case in which two steps are provided, and two steps 3 and 4 are provided at a lower portion of a door 2 on the side surface of the cab 1 and vertically with a predetermined interval. It is being touched.

[0004]

[Problems to be solved by the device]

 However, the driver's seat of a heavy-duty truck is located, for example, at a height of about 1.3 m, and even if there are such steps, it takes a considerable amount of effort to get on and off.

An object of the present invention is to provide a step device for a vehicle, which makes it easier to get in and out of a cab by automatically raising and lowering a step.

[0006]

[Means for Solving the Problems]

 The present invention, as shown in FIG. 13, has a movable step 50 located below a door on the side of a vehicle, a driving means 51 for moving the movable step 50 up and down, a means 52 for detecting opening and closing of the door, and a seating on a seat. An operation switch 55 for moving the movable step 50, a means 56 for determining whether to get on or off the vehicle from the detection results of seating and door opening / closing, On the condition that the user is on the movable step 50 when operating the switch 55, there is provided a control means 57 for raising or lowering the movable step 50 via the driving means 51 according to the judgment result of getting on or off.

Further, the movable step is supported by a parallel link mechanism attached to the vehicle body, and a cylinder for vertically rotating the parallel link mechanism is provided, and the movable step is provided between a horizontal position and a vertical position with respect to the link tip. Provide an auxiliary cylinder that is mounted so as to rotate and that moves the movable step from the horizontal position to the storage position.

Further, the movable step is supported by a parallel link mechanism attached to the vehicle body, and a cylinder for vertically rotating the parallel link mechanism is provided, and the movable step is provided between a horizontal position and a vertical position with respect to the tip of the link. The movable step is provided with a lever so that the movable step is pivoted from the horizontal position to the vertical position at the highest position, and a protrusion that cooperates with the lever is provided on the vehicle body side.

Further, the door opening / closing detecting means detects the opening of the door when the door is opened to a predetermined opening or more.

[0010]

[Action]

 Depending on the opening and closing of the door and the seating condition of the seat, it is judged whether to move in or out of the vehicle, and after confirming that you are actually on the movable step, move according to the judged getting on and off motion. Since the steps are raised and lowered, it is possible to get on and off the vehicle safely and reliably.

Since the movable step is vertically stored at the storage position by the auxiliary cylinder and forms the same surface as the door, the aerodynamic resistance during traveling can be reduced.

The rotation of the movable step to the retracted position can be automatically performed by the cooperation of the lever and the protrusion as the movable step moves upward via the parallel link mechanism.

Since the movable step does not move unless the door is opened more than a predetermined opening, it is possible to prevent interference when there is an obstacle in the vicinity of the movable step.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the base end of the parallel link mechanism 6 is fixed to the vehicle body frame 5 at the lower surface of the door 2 of the cab 1, and the movable step 7 is freely rotatable at the tip. Mounted. The parallel link mechanism 6 is swung out by the cylinder 8 toward the side surface of the vehicle body, and moves the movable step 7 between the ascending position near the fixed step 9 on the lower surface of the door 2 and the descending position near the ground.

In the movable step 7, the stay 10 is rotatably connected coaxially with a part of the support shaft 11 of the parallel link mechanism 6, and the auxiliary cylinder 12 connected to the tip of the stay 10 moves the stay 10 to a horizontal position and a vertical position. Rotate between and. When the movable step 7 is in the vertical storage position, the movable step 7 is inverted to cover the fixed step 9 above it, forming a flat surface below the door 2.

On the other hand, inside the cab 1, a seat switch 15 for detecting that an occupant is seated on the seat 14 and a door switch 16 for detecting opening / closing of the door 2 are provided. An operation switch 17 for instructing the up and down movement of the movable step 7 is attached near the seat 14. As shown in FIG. 4, the movable step 7 is provided with a step switch 18 which senses that a person is riding on the movable step 7 in a part of the parallel link mechanism 6 on the back surface of the movable step 7.

A controller (not shown) for controlling the driving of the cylinder 8 to raise and lower the movable step 7 is provided based on signals from the respective switches 15 to 18 and signals (not shown) from a vehicle speed sensor and a parking brake switch. . The control operation executed by this controller will be described with reference to the flowchart of FIG.

First, in step 1, the door 2 is opened by a signal from the door switch 16, and then in step 2, when it is determined that the vehicle speed is zero and the parking brake is in an operating state, that is, the vehicle is completely stopped, In step 3, it is determined from the signal from the seat switch 15 whether or not the occupant is seated in the seat 14.

If a person is not seated in the seat 14, it is determined that the operation is to get on the cab 1, and the process proceeds to steps 4 to 9. The auxiliary cylinder 12 deploys the movable step 7 from a vertically stored position to a horizontal position (see FIG. 2), and then operates a cylinder 8 to a predetermined lower position of FIG. 3 via a parallel link mechanism 6. Lower movable step 7 to stop.

When the occupant operates the operation switch 17 in steps 5 and 6 to move up and moves on the movable step 7 based on the signal from the step switch 18, the cylinder 8 is moved up while being retracted. Enter (step 7). In this case, the movable step 7 rises while maintaining the horizontal state by the horizontal link mechanism 6, and eventually reaches the raised position in FIG. 2 and stops. In this state, move to cab 1 from fixed step 9, close door 2 and judge again whether or not a person is on movable step 7, and if it is confirmed at step 9 that there is no person, move to step 17 to assist The cylinder 12 is operated to rotate the movable step 7 to the vertical position as shown in FIG.

On the other hand, when the occupant is sitting on the seat 14 in step 3, it is determined that the operation is to get out of the cab 1, and the process proceeds from step 10 to 16. First, the auxiliary cylinder 12 is activated to horizontally deploy the movable step 7 as shown in FIG.

When it is determined that the occupant has stepped on the movable step 7 at this position, the cylinder 8 is operated to lower the movable step 7 while keeping it horizontal. When it reaches a predetermined lowered position, the cylinder 8 is stopped. Then, when it is detected that the door 2 is closed, it is determined that a person descends from the movable step 7, and the movable step 7 is raised to a predetermined rising position (steps 14 to 16). Then, after this, in step 17, the auxiliary cylinder 12 is operated to rotate the movable step 7 to the storage position.

In this way, the movable step 7 is automatically raised or lowered after determining whether to get into or out of the cab 1, and after confirming that the movable step 7 is surely got on. It is safe and easy to get in and out of 1.

Next, in the embodiment shown in FIGS. 8 and 9, when the movable step 7 is rotated to the retracted position, the tip of the stay 10 of the movable step 7 is bent at a substantially right angle without using the auxiliary cylinder 12. While the lever 22 is formed, a protrusion 23 that comes into contact with the lever 22 is provided on the lower surface of the fixed step 9, and the lever 22 protrudes when the cylinder 8 is further contracted from the raised position of the movable step 7. In this case, the movable step 7 is rotated to the vertical position.

Accordingly, after the person descends at the raised position of the movable step 7, the movable step 7 is further slightly raised, so that the movable step 7 can be automatically placed in the vertical storage position.

In the embodiment shown in FIGS. 10 and 11, when the door 2 is not opened more than a predetermined opening degree, the opening of the door 2 is not detected and an obstacle is present below the door 2. For example, the movable step 7 is not expanded.

Therefore, as the door switch 16 for detecting the opening of the door 2, a rotary switch 26 interlocking with the wire 25 connected to the door 2 is provided, and the contact point of the rotary switch 26 when the wire 25 extends a certain amount or more. 26a and the contact 26b are brought into contact with each other to be turned on. The rotary switch 26 is rotated to an initial position by a coil spring (not shown) that automatically winds the wire 25 when the door 2 is closed.

Therefore, in this case, when the door 2 is not opened to a certain extent when getting off the cab 1, the rotary switch 26 is not turned on, the cylinder 8 does not operate, and the movable step 7 does not deploy horizontally. Therefore, depending on the position where the vehicle is stopped, there is an obstacle near the door 2 and you do not notice it. When you try to get out of the cab 1 and open the door 2 for the first time, you will not notice it. , Even if the distance to the adjacent vehicle is small and the movable step 7 may damage the adjacent vehicle, the movable step 7 will not deploy immediately unless the door 2 is opened until the rotary switch 26 is turned on. Therefore, interference with obstacles can be avoided.

[0030]

[Effect of device]

 As described above, according to the present invention, it is possible to automatically determine whether to get in or out of the cab, and to automatically move the movable step up and down after confirming that a person has stepped on the movable step. Vehicles with a high ground clearance up to the cab can be safely and easily loaded and unloaded, and the movable step can be kept in the retracted position while driving, which reduces aerodynamic drag and allows the vehicle to move when it is snowing. There is no snow on the steps.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing an operating state of the same.

FIG. 3 is a sectional view showing another operating state of the same.

FIG. 4 is an enlarged view of a movable step portion.

FIG. 5 is a perspective view showing a state where a movable step is expanded.

FIG. 6 is a perspective view showing a state where a movable step is stored.

FIG. 7 is a flowchart showing a control operation of a movable step.

FIG. 8 is an enlarged view of a movable step portion of another embodiment.

FIG. 9 is an enlarged view showing the operating state of the same.

FIG. 10 is a plan view of another embodiment.

FIG. 11 is a control circuit diagram of the same.

FIG. 12 is a perspective view of a conventional example.

FIG. 13 is a diagram corresponding to the claims of the present invention.

[Explanation of symbols]

 1 Cab 2 Door 6 Parallel Link Mechanism 7 Movable Step 8 Cylinder 9 Fixed Step 12 Auxiliary Cylinder 15 Seat Switch 16 Door Switch 17 Operation Switch 18 Step Switch 22 Lever 23 Protrusion 26 Rotary Switch

Claims (4)

[Scope of utility model registration request] 1. A movable step located below a door on a side surface of a vehicle, and drive means for moving the movable step up and down.
A means for detecting the opening / closing of the door, a means for detecting seating on the seat, a means for detecting that the user has moved to a movable step, an operation switch for the movable step, and the detection result of seating and opening / closing of the door, whether the passenger is getting on or off And a control means for raising or lowering the movable step via the driving means on the condition that the user is on the movable step at the time of operating the operation switch, depending on the determination result of getting on or off the vehicle. Characterized vehicle automatic stepping device. 2. A movable step is supported by a parallel link mechanism attached to a vehicle body, and a cylinder for rotating the parallel link mechanism up and down is provided, and the movable step is rotated between a horizontal position and a vertical position with respect to the link tip. The automatic step device for a vehicle according to claim 1, further comprising an auxiliary cylinder that is movably mounted and that rotates a movable step from a horizontal position to a storage position. 3. A cylinder, which supports the movable step on a parallel link mechanism attached to a vehicle body, and pivots the parallel link mechanism up and down, and rotates the movable step between a horizontal position and a vertical position with respect to the link tip. The lever according to claim 1, wherein the movable step is provided with a lever so that the movable step is pivotally moved from a horizontal position to a vertical position at the highest position, and a protrusion cooperating with the lever is provided on the vehicle body side. Automatic step device for vehicles. 4. The door opening / closing detecting means detects the opening of the door when the door is opened to a predetermined opening or more.
An automatic step device for a vehicle according to any one of 1.