JPH10272958A - Accelerator pedal locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability by providing a lock lever rotatably below an accelerator pedal, and bringing the working end of an actuator into contact with a cam part provided at a rotary shaft of the lock lever, to press the cam part, thereby rotating the lock lever to inhibit depression of the accelerator pedal. SOLUTION: A rotatable lock lever 3 with a rotary shaft 38 pivotally supported to a bracket 7 is provided below an accelerator pedal 1, and a cam part 4 is provided at the rotary shaft 3a fixed in such a way as to be moved integrally with the lock lever 3. This cam part 4 is pressed by the working end 5a of an actuator 5 such as an air cylinder. The lock lever 3 is therefore rotated along with the rotary shaft 3a, and stands up to the lower face of the accelerator pedal 1 so as to be fixed in a lock position R. The lock lever 3 can therefore lock surely without applying depressing force of the accelerator pedal 1 in a stroke direction of the actuator 5, and durability can be improved because of not imposing a burden on the actuator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a route bus operated by a single person, for example, in order to prevent danger, in a state where an entrance door is open, an accelerator pedal is fixed, and even if the accelerator pedal is depressed, The present invention relates to an accelerator pedal lock device that prevents an accelerator pedal from being depressed.

[0002]

2. Description of the Related Art In a route bus operated by a single person, since the entrance is located at the center or rear of the vehicle, it is difficult to confirm the open / closed state of the door. If the driver depresses the accelerator pedal while the deadline is incomplete, the passenger may be in danger.

In order to prevent this danger, when the door is open, the accelerator pedal is mechanically fixed so that the accelerator pedal cannot be depressed even if the accelerator pedal is depressed. Equipment is provided. Such an accelerator pedal lock device prevents departure when the taxi door is about to close,
It is used to prevent starting of various types of work vehicles during work, and a similar lock device is used not only for an accelerator pedal but also for a clutch pedal.

Various modifications have been made to the accelerator pedal lock device, and one of them is shown in FIGS. 8 and 9 which show the structure of an accelerator pedal lock device developed by the present inventors. 8 and 9 are views of the accelerator pedal 1 as viewed from the side. A lock lever 24 having a rotating shaft 24c fitted to a bracket 22 provided in front of the accelerator pedal 1 is attached, and a roller 25 is attached to one end of the lock lever 24. It is provided. The other end of the lock lever 24 is provided with a shaft 26a of the air cylinder 26.
The air cylinder 26 is connected to an air tank 29 via a solenoid valve 27 that opens and closes in synchronization with a door open / close switch.

According to the accelerator pedal lock device,
When the door is in the closed state, as shown in FIG.
Since 27 escapes the compressed air of the air cylinder 26 to the atmosphere,
The shaft 26a of the air cylinder 26 is retracted by the internal return spring. When the shaft 26a is retracted, the lock lever 24 is also returned to the unlocked position shown in FIG. 8 by a return spring (not shown), so that the accelerator pedal 1 can be depressed and normal operation by the accelerator pedal 1 becomes possible.

[0006] When the door is in the open state, FIG.
As shown in the figure, the solenoid valve 27 makes the air tank 29 communicate with the air cylinder 26 by a signal indicating the open state of the door, and the compressed air in the air tank 29 is passed through the air pipe 26 through the air pipe 28.
The shaft 26a of the air cylinder 26 is pushed out, and the end of the lock lever 24 is pushed down until it hits the stopper 23, and at the same time the roller 25 on the opposite side is pushed up to lock the accelerator pedal 1.

At this time, even if the accelerator pedal 1 and the roller 25 come into contact with each other, a large operating force is used as the air cylinder 26 and the roller 25 provided at the tip of the lock lever 24 rotates. The lock lever 24 can be brought to a predetermined lock position. When the accelerator pedal 1 is depressed during this lock, the pushing force of the roller 25 at the tip of the lock lever 24, that is, the pushing force of the shaft 26a of the air cylinder 26 opposes the pushing force, so that the accelerator pedal 1 is depressed. Has been prevented.

By linking the operation of the solenoid valve 27 with the opening / closing switch of the door, the accelerator pedal 1 can be depressed with a predetermined stroke S as shown in FIG. 8 during normal operation with the door closed. When the door is opened and the interlock is effective, the accelerator pedal 1 can be fixed by the lock lever 24 as shown in FIG. 9 so that the accelerator pedal 1 cannot be depressed.

However, in this device, when the force generated by the air cylinder 26 becomes weak due to insufficient air pressure at the time of locking or air leakage which is likely to occur due to the use of a long air pipe, the air cylinder 26 However, there is a risk that the accelerator pedal 1 will be depressed and the vehicle will start. As an improvement to this, as shown in FIG. 10, the angle formed by the accelerator pedal 1 and a line connecting the contact point of the roller 25 with the accelerator pedal 1 and the center of the rotation shaft 24c is inclined forward by θ with respect to a right angle. Then, when the depressing force is applied to the accelerator pedal 1,
A rotational force is generated in the front of the lock lever 24 (direction A in the figure), that is, on the side to be locked, and this rotational force is received by the stopper 23 on the floor surface 10 to prevent the lock lever 24 from being pushed back during locking. There is a device.

[0010]

However, in these accelerator pedal lock devices, the stroke of the accelerator pedal 1, that is, the rotation shaft 24c of the lock lever 24, is required.
In order to secure the distance between the
It is necessary to form c with a small diameter. However, this rotary shaft 24c has a stepping force applied via the roller 25 and the lock lever 24, and dust easily adheres under bad conditions of the feet. There is a problem in that the rotating shaft 24c is easily damaged by dust, and looseness due to bitterness and abrasion occurs to cause malfunction.

Further, with respect to the air cylinder 26, the roller 25 is slid on the back surface of the accelerator pedal 1 to attach the lock lever 24 to a predetermined position in order to generate a force opposing the stepping force. However, since a large operating force is required, and a long stroke is required for the stroke to hit the end of the lock lever 24 to the stopper 23 of the floor surface 10, the air cylinder 26 becomes large, and in a small floor space, However, there is a problem that the arrangement of the components becomes difficult.

Further, the roller 25 is slid to the back of the accelerator pedal 1 to fix the lock lever 24 at a predetermined position.
There is also a problem that the durability of the 25 needs to be improved.
Further, in the case of the improved device of FIG.
However, if the lock lever 24 rotates too much, a gap beyond the play of the accelerator pedal 1 is formed between the accelerator pedal 1 and the engine, and when the pedal is depressed, the rotation of the engine increases. Coordination becomes very important. This adjustment is performed using the accelerator pedal 1 shown in FIG.
In addition, since it is necessary to perform the operation on a narrow floor where the brake pedal 52 and the clutch pedal 53 are provided, there is a problem that it is difficult and troublesome.

In addition, it is necessary to stroke the shaft of the air cylinder until the lock lever 24 stops at the stopper 23. Even if the stroke is finely adjusted, the operating force and operating speed of the air cylinder are large. There is a problem that the shaft collides with the stopper 23 and wears the cushion rubber provided on the stopper 23. SUMMARY OF THE INVENTION It is an object of the present invention to securely lock an accelerator pedal, and furthermore, it is easy to adjust a device and can be easily installed even in a narrow space between pedals. It is an object of the present invention to provide an inexpensive accelerator pedal lock device with noise.

[0014]

An accelerator pedal lock device according to the present invention is provided with a lock lever rotatably supported at one end under an accelerator pedal supported at one end.
A cam portion is formed on the rotation shaft of the lock lever,
An actuator having an operating end that abuts on the cam portion is provided, and by operating the operating end of the actuator on the cam portion, the lock lever is rotated to stand on the lower surface of the accelerator pedal, The accelerator pedal is inhibited from being depressed.

Further, a support member for supporting a load applied to the working end is provided below the working end of the actuator. In addition, a cam portion having a plurality of flat surfaces that are parallel to each other in a stepwise manner in the direction of movement of the working end of the actuator with the rotation is provided on the rotation shaft of the lock lever, and the working end of the actuator is If it is formed in a step shape so as to sequentially contact the flat surface, the rotation of the lock lever can be locked in multiple steps.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a rotatable lock lever 3 having a rotating shaft 3 a pivotally supported by a bracket 7 is provided under an accelerator pedal 1 that swings up and down.
Further, a cam portion 4 is provided on a rotating shaft 3a fixed so as to move integrally with the lock lever 3. The cam portion 4 is formed by, for example, an inclined surface obtained by cutting off a part of the rotating shaft 3a while leaving the shaft center 3c as shown in FIGS. 1, 3, and 4, or as shown in FIG. The cam portion 4 is fitted to 3a.

When the cam portion 4 is pressed by the operating end 5a of the actuator 5 such as an air cylinder, the lock lever 3 is rotated together with the rotating shaft 3a to be raised on the lower surface of the accelerator pedal 1 and is indicated by a two-dot chain line. To the lock position R shown. As shown in FIG. 3, when a portion of the cam portion 4 at a position away from the axis of the rotary shaft 3 a is pressed in the direction A, a rotation moment is generated around the rotary shaft 3 a, and the lock is generated. The lever 3 is turned in the direction of arrow C. Then, when the working end 5a pushes the cam portion 4 completely, and the working end 5a and the cam portion 4 are parallel to each other, as shown in FIG.
The configuration is such that the roller 2 provided at the end of the abutment comes into contact with the accelerator pedal 1.

The force required for this rotation is a small force because it is a force opposing the force for lifting the own weight of the lock lever 3 and the urging force of a return spring (not shown) provided as necessary. When the large diameter cam portion 4 is provided as shown in FIG. 2, the operating force of the actuator 5 can be reduced. When a depressing force is applied to the accelerator pedal 1 in this locked state, most of the load is applied to the bracket 7,
The accelerator pedal 1 can be locked by the bracket 7.
When a rotational moment for rotating the lock lever 3 in the direction of arrow D is generated, a bending moment is generated at the operating end 5a via the cam portion 4, so that the operating end 5a itself supports the bending moment. As shown in FIG. 1, a support member 8 is provided below the working end 5a.
This bending moment is supported to reduce the force and moment applied to the working end 5a of the actuator 5. The rotational moment and the bending moment can be made almost zero by making the angle between the lock lever 3 and the accelerator pedal 1 substantially a right angle.

When the working end 5a is moved in the direction of arrow B, the lock lever 3 is rotated in the direction of arrow D by its own weight or a spring force (not shown), and hits the stopper 9 formed of the cushioning material. The position returns to the lock release position U of FIG.
In this state, the accelerator pedal can be depressed, so that normal accelerator operation can be performed. Next, a mechanism for locking the lock lever 3 in multiple stages will be described.

As shown in FIG. 5, the rotation end 3a of the actuator 5 is
A plurality of flat surfaces 4a, which are parallel to the moving direction of the
There is provided a cam portion 4 having 4b. Further, the end of the actuator 5 is formed in a stepped shape with a small diameter so that the operating end 5a of the actuator 5 is sequentially brought into contact with the flat surfaces 4a and 4b. Further, the actuator 5 is formed so as to be able to stroke in multiple stages.

With this configuration, the rotation of the lock lever 3 can be locked in two stages, and the accelerator pedal 1 is
Not only can it be locked in a stopped state, it can also be locked in an intermediate opening state, so it can be used for applications such as preventing sudden acceleration. FIG. 5 shows the operation state. First, the state is changed from the state before locking in the first stage in FIG. 5A to the locked state in the second stage in FIG. Thus, the locking of the rotation of the lock lever 3 can be controlled in two stages. Note that M in the figure is a mark for clearly indicating the rotation state.

The two-stage locking actuator 3 is formed by an air cylinder as shown in FIGS. 6 and 7, for example. In FIG. 6, the air supply / exhaust ports Pa,
Pb and Pc are provided, and when compressed air enters from the air supply / exhaust port Pa by operation of a solenoid valve or the like (not shown), the small-diameter portion 35a strokes until the small-diameter pressure receiving portion 36a reaches the large-diameter portion 35b. When reaching the portion 35b, the air supply / exhaust port Pb is open to the discharge side, and the compressed air is discharged, so that the piston 36 stops at this position. This position is the end position of the first stage rotation.

Next, when the compressed air is supplied also from the air supply / exhaust port Pb by switching the solenoid valve, the large-diameter pressure receiving portion 36b is pushed out to the position of the stopper 37, and the second stroke is completed. The two-stage rotation ends. Regarding the return, these operations can be performed in reverse by the urging force of the return spring 38 and the opening / closing of the air supply / exhaust ports Pa, Pb, Pc, and the return can be operated in two stages.

FIG. 7A shows an air supply / exhaust port P
When the compressed air is supplied from a, it passes through the passage 49 provided in the first pressure receiving portion 46a, enters the closed chamber 45a, and presses the first pressure receiving portion 46b. At this time, the air supply / exhaust port Pb is closed. When the piston 46 further moves and the air supply / exhaust port Pa is closed as shown in FIG. 7B, the supply of air is cut off, so that the piston 46 stops at this position and the first stage rotation Ends.

Further, when air is supplied from the air supply / exhaust port Pb, the stroke further proceeds, stops at the stopper 47, ends the second stroke, and ends the second rotation. In return, the return spring 48
Air supply / exhaust port Pa
When the air supply / exhaust port Pb is opened, the stroke returns to the end position of the first stage until the air supply / exhaust port Pa is closed, and returns to the initial position when the air supply / exhaust port Pb is further opened.

According to the accelerator pedal lock device having the above structure, the lock lever 3 is rotatably provided with the one end pivotally supported under the accelerator pedal 1 whose one end is pivotally supported. A cam portion 4 is formed on the rotating shaft 3a of the actuator, and an operating end 5a of an actuator 5 is brought into contact with the cam portion 4 and pressed, and the lock lever 3 is rotated to stand on the lower surface of the accelerator pedal 1 so that the accelerator Since the depression of the pedal 1 is prohibited, the accelerator pedal 1
The stepping force is not applied in the stroke direction of the actuator 3, the locking can be reliably performed, and no load is applied to the actuator 3.

Further, the stroke of the working end 5a of the actuator 5 may be longer than the distance for rotating the rotating shaft 3a of the lock lever 3, and even if it is large, there is no trouble, so that the stroke adjustment is unnecessary. In addition, the actuator 3 can be reduced in size, the operating force can be reduced, and the operating speed of the abutting portion can be reduced, so that the operating noise is reduced and the working end 5a itself acts as a stopper, so that the elastic stopper has a simple structure and is worn. Is also unnecessary.

In these devices, since the lock lever 3 does not extend beyond the rotating shaft 3a, the space between the rotating shaft 3a and the floor 10 can be reduced, so that the rotating shaft 3a and the accelerator Since a large space between the pedal 1 and the rotary shaft 3a can be formed,
The problems of wear and malfunction of the rotating shaft 3a can be solved. Further, by providing a support member 8 for supporting the load applied to the working end 5a below the working end 5a of the actuator 5, the force applied to the actuator 5 can be further reduced, so that failures can be reduced and durability can be reduced. Performance can be improved.

Furthermore, at least two flat surfaces 4a and 4b are formed on the cam portion 4, and the actuator 5 is formed so as to be able to stroke in multiple stages, and the working end 5a is engaged with the flat surfaces 4a and 4b. By providing a step, the rotation of the lock lever 3 can be locked in multiple steps, so that the accelerator pedal can be locked at an arbitrary position of the accelerator opening, and sudden acceleration can be prevented.

[0030]

According to the accelerator pedal lock device of the present invention described above, the lock lever is provided rotatably below the accelerator pedal, and the working end of the actuator is attached to the cam provided on the rotary shaft. It is configured so that the accelerator pedal is depressed by contacting and pressing and rotating the lock lever to prevent the accelerator pedal from being depressed, and the accelerator pedal depressing force is not applied in the stroke direction of the actuator. In addition, it is possible to prevent a failure of the actuator without imposing a load on the actuator.

Further, it is not necessary to adjust the stroke of the operating end of the actuator, and since the operating end itself has a function as a rotation stopper of the lock lever, an elastic stopper can be eliminated and a simple structure can be obtained. In addition, the lock lever has a shape that does not extend backward from the rotary shaft, so the distance between the rotary shaft and the floor can be reduced, and the clearance between the rotary shaft and the accelerator pedal can be increased. It is possible to prevent looseness and malfunction due to wear of the rotating shaft.

Further, by providing a support member for supporting the load below the working end of the actuator, the force applied to the actuator can be further reduced, so that the failure of the actuator can be reduced and the durability can be improved.
In addition, a cam portion having a plurality of flat surfaces that are stepwise parallel to the moving direction of the working end of the actuator with the rotation is provided on the rotation shaft of the lock lever, and the working end of the actuator is sequentially applied to the flat surface. When formed so as to be in contact with each other in a stepped manner, the rotation of the lock lever can be locked in multiple steps, so that the accelerator pedal can be locked at an arbitrary position of the accelerator opening, and locking for preventing sudden acceleration can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of an accelerator pedal lock device showing an embodiment of the present invention.

FIG. 2 is a perspective view of an accelerator pedal lock device showing another embodiment of the present invention.

FIGS. 3A and 3B are partial views of a rotation shaft of a lock lever when the accelerator pedal lock device is unlocked, FIG. 3A is a side view, and FIG. 3B is a cross-sectional view along XX.

FIGS. 4A and 4B are partial views of a rotation shaft of a lock lever when the accelerator pedal lock device is locked, where FIG. 4A is a side view and FIG. 4B is a cross-sectional view along XX.

FIG. 5 is a view showing the operation of a two-stage rotation lever,
(A) shows the middle of the first stage rotation, (b) shows the end of the first stage rotation, and (c) shows the end of the second stage rotation.

FIG. 6 is a sectional view showing an example of an air cylinder for two-stage rotation.

FIG. 7 is a cross-sectional view showing another example of an air cylinder for two-stage rotation, in which (a) shows a halfway rotation of a first stage,
(B) shows the middle of the rotation in the second stage.

FIG. 8 is a side view of a prior art accelerator pedal lock device when the lock is released.

FIG. 9 is a side view of a prior art accelerator pedal lock device when locked.

FIG. 10 is an explanatory view of a locking method of a prior art improved accelerator pedal locking device.

FIG. 11 is a plan view showing an example of arrangement of an accelerator pedal and the like.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Accelerator pedal 2 ... Roller 3 ... Lock lever 3a ... Rotating shaft 4 ... Cam part 4a, 4b ... Flat surface 5 ... Actuator 5a ... Working end 7 ... Bracket 8 ... Support member 9 ... Stopper 10 ... Floor surface R ... Lock position U… unlock position

Continuing from the front page (72) Inventor Akio Saito 3-25-1, Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Kawasaki Plant of Isuzu Motor Co., Ltd. (72) Inventor Masanobu Morino 3- 25-1, Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture No. Isuzu Motors Corporation Kawasaki Plant (72) Inventor Toru Okubo 3-25-1, Tonomachi, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Isuzu Motors Corporation Kawasaki Plant (72) Inventor Shuji Wakisaka 8 Fujisawa City, Fujisawa City, Kanagawa Prefecture Isuzu Motors Co., Ltd. Fujisawa Plant (72) Inventor Tsuguo Fujita 8th floor of Tsurana, Fujisawa City, Kanagawa Prefecture Isuzu Motors Co., Ltd. Fujisawa Plant (72) Inventor Michiyo Tokumoto 3-25-1, Tonomachi, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Isuzu Motors Corporation Kawasaki Plant (72) Inventor Kazuyuki Kuroda 3-25-1, Tonomachi, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Isuzu Motors Corporation Kawasaki Plant (72) Inventor Takehisa Iwamoto Kamizayabe, Totsuka-ku, Yokohama, Kanagawa Prefecture Town character Fujii 320 Hashimoto Forming Industry Co., Ltd.

Claims (3)

[Claims] 1. A lock lever is pivotally provided at one end under an accelerator pedal pivotally supported at one end, and is provided rotatably.
A cam portion is formed on the rotation shaft of the lock lever,
An actuator having an operating end that abuts the cam portion is provided, and by operating the operating end of the actuator on the cam portion, the lock lever is rotated to stand on the lower surface of the accelerator pedal. An accelerator pedal lock device that prohibits depression of the accelerator pedal. 2. The accelerator pedal lock device according to claim 1, wherein a support member for supporting a load applied to the working end is provided below the working end of the actuator. 3. A cam portion having a plurality of flat surfaces parallel to each other in a stepwise manner in a direction of movement of the working end of the actuator with rotation on the rotation shaft of the lock lever. 3. The accelerator pedal lock device according to claim 1, wherein the working end is formed in a step shape so as to sequentially contact the flat surface.