JPH0242523Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a step device for entering and exiting a tiltable cab.

BACKGROUND OF THE INVENTION It has been well known in the art to provide a step on the cab of a vehicle on which the occupant can place his/her feet in order to facilitate the rider's getting on and off the cab of a vehicle. In this case, it is desirable that the width of the step in the direction of vehicle travel be wide and the height of the step not be too high so that the passenger can easily put his or her feet on the step. However, when the cab is tiltably supported relative to the vehicle frame, the steps have traditionally been made too wide in order to prevent the steps from interfering with tires located near the steps when the cab is tilted. or its height could not be lowered very much.

This invention was made based on the above recognition,
The object is to provide a step device in which the height of the step and its width in the direction of vehicle travel can be set more freely than in the past.

Hereinafter, advantageous embodiments of the present invention will be described in detail with reference to the drawings, in comparison with conventional step configurations.

In FIG. 1, 1 indicates the cab of the vehicle, 2 indicates a door provided in the cab 1, 3 indicates a loading platform supported by the frame 4 of the vehicle, and 5 indicates a tire (front wheel) located below the cab 1. . cab 1
is supported by the frame 4 so as to be tiltable in the direction of arrow A around a tilt center indicated by symbol C. When the cab 1 is in the illustrated position, that is, the normal operable position, its rear part is supported by a cab abutment 6 fixed to the frame 4,
It is locked by a locking device 7. To tilt the cab 1, the locking device 7 is unlocked and the cab 1 is tilted in the direction of arrow A by a drive device (not shown).

A step device 8 according to the present invention is attached to the lower part of the cab 1, but for the purpose of understanding the present invention, before explaining the details of this device 8, the structure of a conventional step will be explained. Conventional step 10
9 is immovably fixed to the bottom surface of the cab 1 as shown by the broken line in FIG. 1, and the passenger can step into and out of the cab 1 by placing his or her feet on the step surface 110. By the way, when the cab 1 is tilted in the direction of arrow A as described above, step 1
09 also rotates along with the cab 1 while drawing a locus shown by an arc B around the tail center C, but since the tire 5 is located near the step 109, when the step 109 operates as described above,
Step 10 to prevent this from interfering with tire 5.
The position and shape of 9 must be determined. In other words, in order to make it easier to step on the step 109, the step 109 may be placed lower than the position shown in FIG. It is not allowed to expand the width w.

Therefore, in the step device 8 according to the present invention, the step 9 is supported by a support 10 fixed to the bottom of the cab 1 by a pivot 11 so as to be rotatable in the direction of arrow D. This step 9 is rotatably driven by a drive means consisting of a solenoid device 12 between a use position shown by a solid line and a storage position shown by a chain line. The solenoid device 12 has a plunger 13 whose tip is attached to the pin 1 at the end of the step 9.
4, and the case 15 of the device is also pivotally connected to the cab 1 by pins 16. In this case, the column 10 and solenoid device 12 of the step device 8 and the step 9 rotated to the retracted position
These are the tires 5 when the cab 1 tilts.
It is positioned in advance so that it will not interfere with the

Normally, solenoid device 12 is deenergized and its plunger 13 is held in the retracted position, shown in solid lines in FIG. 1, by a spring, not shown. At this time, the step 9 occupies the use position shown by the solid line, and the support tongue piece 10a protruding from the column 10
The underside of the step is supported by a step, on which the rider can rest his or her feet, similar to a conventional step. When the cab 1 is to be tilted, the solenoid device 12 is energized and its plunger 13 projects downwards against the action of the spring described above. This causes the step 9 to pivot about the pivot 11 in the direction of arrow D and is brought into the retracted position shown by the chain line.
Next, the cab 1 tilts in the direction of the arrow A together with the step device 8, but at this time, as described above, the entire step device 8 occupies a position where it does not interfere with the tire 5, so that it is prevented from hitting the tire 5. . The same applies when the cab 1 is operated to return it to the operable position. In this way, when the cab 1 is tilted, the step 9 can be placed in the retracted position and interference between the step 9 and the tire 5 can be prevented, so the height of the step 9 when in the use position is lower than that of the conventional step 109. In addition, it is possible to move closer to the tire 5 than before and make the width W larger so that the passenger can get in and out of the cab 1 in a comfortable posture.

By the way, the solenoid device 12 can be energized or deenergized by manually operating a switch (not shown).
This can be done by turning the switch ON and OFF, but if the cab 1 is tilted without turning this switch ON, the step 9 may collide with the tire 5, potentially damaging the step device 8. . Therefore, in the configuration according to the present invention, the cab 1
When the locking device 7 mentioned above is unlocked, the solenoid device 12 is automatically switched on.
It is configured to turn on, thereby preventing the above-mentioned dangers from occurring. That is, when tilting the cab 1, the locking device 7 must be unlocked, so if the solenoid device 12 is turned on at the same time as the unlocking, the step 9 can be left protruding into the operating position. It is possible to completely prevent the cab 1 from tilting. Various configurations can be appropriately adopted to obtain such an operation. For example, the lock device 7 is unlocked or locked by manually operating a control lever (not shown); A switch (not shown) for the solenoid device 12 may be provided, which is turned on when the lock device 7 is locked and turned off when the lock device 7 is locked by operating the operating lever. When the operating lever is operated to tilt cab 1,
The switch is turned on, and the solenoid of the solenoid device 12 is connected to a power source (not shown) via the switch. By energizing the solenoid device 12 in this manner, the plunger 13 of the solenoid device 12 projects downward, and the step 9 is rotated to the retracted position and fixed. When the cab 1 is returned to the operable position shown in FIG. 1 and the locking device 7 is locked by operating the operating lever, the solenoid device 12
is de-energized and the spring of the device pulls the plunger 13 back upwards, returning the step 9 to the position of use and fixing it.

In addition, for further safety, the solenoid device 12 should be configured so that the solenoid device 12 is not energized unless the vehicle's power switch (not shown) is turned off using the vehicle's starter key (not shown). is also advantageous. In this case, the step 9 will only rotate to its retracted position when the power switch of the vehicle is turned off and the locking device 7 is unlocked.

In the above embodiment, as a driving means for the step,
Although a solenoid device is used, it will be appreciated that other suitable drive means may be used, such as a hydraulically actuated cylinder, such as an air or hydraulic cylinder, or an electric motor. Second
3 and 3 show an embodiment of a step device using a reversible motor as the drive means.

2 and 3, two pillars 10 spaced apart from each other are rigidly supported in the lower part of the cab, for example the floor 1a of the cab, and a pivot 1 is attached to the lower end of the pillars 10.
1 is rotatably supported. On the other hand, cab 1
A reversible motor 18 is fixedly supported on the floor 1a by a support bracket 17, and its output shaft 19
A worm 20 is fixed to the worm 20 . A worm gear 21 meshes with the worm 20, and the worm gear 21 is firmly fixed to the aforementioned pivot shaft 11. Further, an end 9a of the step 9 is fixedly connected to the pivot 11, and supporting tongues 10a are respectively protruded from the lower end of the pillar 10 described above, and the step 9 is in the operating position shown by the solid line. It is placed on both support tongues 10a.

As in the previous embodiment, when the locking device 7 (see FIG. 1) is unlocked to tilt the cab 1, the switch (not shown) of the reversible motor 18 is turned on and the motor is turned on. 18 starts operating. This causes the output shaft 19 to rotate by a predetermined angle, for example, about 180 degrees, and then the switch is turned off.
The motor 18 is turned off and stops operating. As the output shaft 19 rotates in this manner, the worm 20 also rotates, and the worm gear 21 meshed with the worm gear 21 rotates together with the axis of the pivot shaft 11 in the direction of the arrow (FIG. 2). Therefore, the step 9 rotates in the direction of arrow B' and stops at the storage position shown by the chain line. The cab 1 is then tilted, but, as in the previous embodiment, the step device 8, in particular its step 9, does not strike the tire 5 (FIG. 1).

When the cab 1 is returned to its operable position and the locking device 7 (Fig. 1) is locked, the reversible motor 1
The switch 8 is turned on again, and the motor rotates by the same angle in the opposite direction to the previously described rotation, thereby returning the step 9 to the use position shown by the solid line. In this way, also in this example, the width of step 9 is increased when it is in the use position.
Moreover, it is possible to reduce the height.

In this embodiment as well, if the motor 18 is configured to start operating only when the power switch of the vehicle is turned off using the starter key and the lock device 7 is unlocked, safety can be particularly improved. It is advantageous to be able to increase Further, as shown in FIGS. 2 and 3, in order to prevent the worm 20 and the worm gear 21 from being soiled by mud or the like, they are supported by a casing 2 supported by a support bracket 17.
It is desirable to surround it with 2. In that case, the opening on the right side of the casing 22 is closed by a telescopic spring member 23 through which the step 9 passes, so that the operation of the step 9 is not obstructed.

As described above, according to the present invention, since the step can be automatically placed in the retracted position when the cab is tilted, it is possible to prevent the step from interfering with the tire. Therefore, the step can be set at a preferable height position, and the width of the step in the vehicle running direction can be expanded, allowing the passenger to easily put his or her feet on the step and get on and off the vehicle.

[Brief explanation of the drawing]

Fig. 1 is a partial side view of a vehicle equipped with a step device according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. - line sectional view. 1... Cab, 7... Lock device, 8... Step device, 9... Step.

Claims (1)

[Scope of utility model registration request] A step is supported on the cab so that it can rotate between a use position used for getting on and off the passenger and a storage position that does not interfere with the tires when the cab is tilted, and a locking device that locks the cab in the drivable position. A tiltable step device for getting on and off a cab, comprising a step driving means for rotating said step to a storage position in conjunction with a lock.