JPS61257348A - Emergency stop method of vehicle on snow covered road - Google Patents

Abstract

PURPOSE:To prevent slip accidents of a vehicle on an icy road, by actuating a main brake pedal and an emergency brake pedal during braking, to actuate a main brake and to make pawls in an emergency stopping device into press- contact with the ground surface. CONSTITUTION:When an emergency brake pedal 29 is depressed during a vehicle running on an icy road surface, a main brake pedal 33 is also depressed. Accordingly, a main brake pedal 33 is also operated. Simultaneously an emergency brake air valve 21 is opened to feed compressed air into an air cylinder 19 which therefore extends to an expandable member 10. A pawl member 15 attached to the front end of the expandable member 10 is made into press- contact with the ground surface. With this arrangement, the occurrence of a slip is prevented upon braking on a snow covered road.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for emergency stopping a vehicle on a snow-capped road.

[Prior Art] Conventionally, on snow-capped roads, chains are wrapped around tires, spiked tires, etc. are used. However, for example, tour buses and the like often travel from warm regions to cold regions in the mountains, and in this case, using spiked tires from the time of departure has the disadvantage of scattering dust.

Therefore, snow tires or radial tires are used and tire chains are wrapped around them, but they often slip on snow-covered roads that are slippery, especially on icy roads. In such cases, the conventional method is to turn the steering wheel in the direction of skidding or apply the brakes again to maintain friction with the road surface, but if the friction cannot be maintained, the vehicle will continue to slide in that state, and eventually This has led to catastrophes such as falls and collisions, and there has been no effective way to prevent them.

[Problem to be Solved by the Invention 1m1] In view of the above drawbacks, the present invention aims to prevent slip accidents on snow-covered roads that are slippery, especially on frozen roads.

[Means for Solving the Problems] In order to achieve the above object, the present invention operates the main brake pedal and the emergency brake pedal in sequence according to operation 1b, and performs an emergency stop using the pressurized fluid supplied by the operation of the emergency brake pedal. An emergency stopping method for a vehicle on a snow-covered road, in particular, an emergency stopping method for a vehicle on a snow-covered road, which is characterized by extending the extensible body of the device, and landing the claw body provided at the tip of the device, and stopping the vehicle in combination with the braking force of the main brake. When pressurized fluid is supplied to the emergency brake air valve activated by the point where the device is kicked +7Q immediately after the front wheels and the emergency brake pedal is pressed, the biloft lamp for preparing the emergency stop device and the trailing device installed at the rear of the vehicle body are activated. When the car warning light is illuminated in one color and the emergency brake pedal is pressed, the emergency stop device is activated.

To provide an emergency stopping method for a vehicle on a snow-covered road, which is characterized in that a playing card and the following vehicle warning light are lit in different colors.

[Example] The drawings show an example of a device implementing the method for emergency stopping of a vehicle on a snow-covered road according to the present invention, and the method for emergency stopping of a vehicle on a snow-covered road according to the present invention will be explained based on this drawing.

A pair of left and right emergency stop devices 1 are attached to the chassis frame 3 immediately behind the front wheels 2 so as to operate on the trajectory of the front wheels 2, thereby increasing the braking effect. That is, a pair of rails 4 are provided in parallel to the chassis frame 3 at the bottom of the vehicle body.
A frame 8 having a pair of rotatable front and rear slide rollers 5b is mounted on the rail 4.
It is placed through. The frame 7 that constitutes the frame body 6 is
A pair of sliding holes 8 are provided parallel to the rail 4, and a pair of elongated sliding holes 8 are provided on the front side thereof. A pair of stoppers 9 are provided at the front end of the sliding hole 8 .

The stopper 9 is movable in the longitudinal direction of the sliding hole 8 in order to adjust the height between the expandable body 10 and the ground. The telescopic weight 0 consists of a pair of parallel arms that are telescopically connected, and the front main shaft 11 is fitted into the slide roller 5a, and the rear sliding shaft 12 is slidably inserted into the sliding hole 8. By being engaged, it hangs down from the frame 7.

The extensible body may be one that is normally stored so as not to protrude on the floor of the vehicle body so as not to impede running, and in addition to the structure described above, it may also be one that is telescopically operated by pressurized fluid such as pressurized air or pressurized oil. , the expandable body IO has a shaft fitted into each pivot portion in order to disperse the impact force upon contact with the road surface. A return spring 14 made of a coil spring is installed between the shaft 13a at the tip and the shaft 13b at the middle of the shaft. A claw body 15 is attached to the distal end portion 13a of the expandable body. The pawl body 15 has four serrated pawls along the direction of travel of the vehicle, that is, in the front-rear direction, and the winds are also provided in the lateral direction at the front and rear ends. The front part of the claw body 15 and the telescopic body l
Between O.

A buffer spring 1B made of a coil spring is provided, and the claw body 15 is always kept in a forward upward position to reduce the impact upon landing.

17 is a horizontal adjustment adjuster attached to the claw body 15. 18 is a shock absorber, and 18a is a compression coil spring. The sliding shaft 12 is connected to a piston body 19a of an air cylinder 19. The air cylinder 19 is connected to an air tank 23 by an air supply pipe 20 via an emergency brake air valve 21 and a preparation air valve 22 .

In the emergency brake air valve 21, a compensation member 6 is pushed up from below by a compression coil spring n onto a valve seat 25 provided in the center of the pod 24. The valve stem 28 is projected above the podium 24, and the pressing rod 30 of the emergency brake pedal 29 comes into contact with this valve stem. The upper chamber 24a and the lower chamber 24b of the podium 24 have outflow ports 31, respectively. The inlet 32 is opened. The emergency brake pedal 29 is placed on a connecting plate 34 protruding from the main brake pedal 33, and is connected to the main brake pedal 33.
When only the emergency brake pedal 29 is stepped on, it does not operate, whereas when the emergency brake pedal 29 is depressed, the main brake is operated first, and then the emergency stop device is operated.

This is to eliminate the loss of time needed to press the emergency brake pedal 29 when using the emergency brake pedal 29 in an emergency, and because the resistance will be extremely large during an emergency stop, the brake pedal 29 is used in conjunction with the braking force of the main brake to reduce the emergency brake pedal 29. This is because the main brake pedal 33 is a pedal that is used many times, so it needs to be able to operate independently. 35 is an adjustment nut that adjusts the length of the pressing rod 30, and is connected to the emergency brake pedal 2.
Adjust the pressing timing in step 9. 36 is a compression coil spring that biases the emergency brake pedal 29 upward (in the return direction).

In the preparation air valve 22, a valve body 37 tapered downward is rotatably fitted into a pod 38. An air supply hole 38 and an exhaust hole 40 are perforated in the valve body 37 at right angles to each other. The air supply hole 39 is formed to have a large diameter so that air can be quickly supplied to the air cylinder 19, and the exhaust hole 40 is formed to have a small diameter so that the expandable body 1O can be quietly stored. Air supply hole 39. The exhaust hole 40 is connected to the lever 4 connected to the compensation 7.
When Yoshikawa-7 was rotated by the rotation of 1, Pode 38
The air supply port (not shown) is connected to the air supply port (not shown), and the air exhaust port (not shown) is connected to the air supply port (not shown).
They are connected to an air supply pipe 20 and an exhaust pipe 42, respectively. The preparation air valve 22 is operated by manually opening and closing a cock (not shown) provided in the driver's seat. However, if the preparation air valve is configured with a solenoid valve and is connected to a sensor (not shown) provided at the bottom of the vehicle body via a predetermined control circuit (not shown), the valve body can be opened and closed, that is, the operation can be turned on. (
ON) and OFF (OFF) can also be automated. The preparation air valve 22 is normally kept closed.

43 is a stop switch that operates when the preparation air valve 22 is turned on, and the air supply pipe 20 connects the preparation air valve 22 and the emergency brake air valve 21.
connected to. When this stop switch 43 is turned on, a pilot lamp (not shown) for preparing an emergency stop device installed in the driver's seat lights up in green, and the letters and frame of a following vehicle warning lamp installed at the rear of the vehicle body light up. is lit green. 44 is a stop switch that operates when the emergency brake pedal 28 is pressed and the emergency stop device is activated, and the emergency brake air valve 2! And air cylinder!
Air supply connecting between S? 20. When this stop switch 44 is turned on, a pilot lamp (not shown) for operating an emergency stop device provided in the driver's seat lights up in red, and the red base color of the following vehicle warning light lights up. .

On roads other than snow-capped roads, the preparation air valve is turned off. Therefore, in this state, even if the driver accidentally depresses the emergency brake pedal 29, the emergency stop device 1
doesn't work.

On snow-capped roads, drivers should judge based on the degree of ice on the road surface.
Turn the cock to open the preparation air valve 22. Then, pressurized air is supplied from the air tank 23 to the bottom of the emergency brake air valve 21, and at the same time the stop switch 43 is pressed and turned on, so that the preparation pilot lamp and the following vehicle warning lamp are lit in green. Even in this state, as long as the driver depresses the main brake pedal 33, the emergency stop device 1 does not operate.

Next, when the driver depresses the emergency brake pedal 29,
The main brake pedal 33 is first pressed via the connecting plate 34, so after the vehicle speed is braked,
Emergency stop device l is activated. That is, since the pressing rod 30 presses the valve stem 4, the emergency brake air valve 21 is opened, and pressurized air is supplied from the lower valve 4b to the air cylinder 19 via the upper chamber 24a. Then, since the piston body 19a of the air cylinder 19 moves in the direction of arrow A, the sliding shaft 12 is moved forward by being pressed by the piston body 19a. Therefore, the elastic body 10 resists the biasing force of the return spring 14, extends downward, and the claw body 15 lands. When the pawl body 15 lands on the ground, the serrated pawl bites into the frozen road surface, resulting in extremely high ground resistance, which, combined with the braking force of the main brake, prevents the vehicle from slipping dangerously. When the claw body 15 lands, the buffer spring 16 causes the claw body 15 to land from the rear, so that the sudden impact applied to the claw body 15 due to an emergency stop is alleviated. (See Figure 9 (a) to (c))
. The sudden shock that the occupant receives when landing is alleviated by the frame body 6 sliding backward (2) in the direction of arrow B in Figure 2) on the rail 4, and the shock absorber 18 and compression coil spring 18a receiving this shock. be done. Emergency brake pedal 2θ
When the stop switch 44 is pressed, the stop switch 44 is activated, so that the operating pilot lamp and the following vehicle warning lamp are lit in red. When the emergency stop is completed, the pressure on the emergency brake pedal 29 is released. Next, when the preparation air valve 22 is closed, the pressurized air is exhausted from the air cylinder 19 through the exhaust pipe 42, so that the elastic body 10 returns to its original position by the biasing force of the return spring 14. In this case, by depressing the emergency brake pedal again, the air pressure between the preparation air valve 22 and the emergency brake air valve 21 is discharged.

[Effects of the Invention] As described above, according to the method for emergency stopping of a vehicle on a snow-capped road according to the present invention, it is possible to effectively prevent slip accidents on a snow-capped road on a slippery road surface, especially on a frozen road surface. can. Moreover, the activation of the emergency stop device starts with a single action, similar to pressing the normal brake pedal.
It is extremely effective in emergencies because it allows immediate response.

[Brief explanation of the drawing]

The drawings show an embodiment of an emergency stop device used in the method for emergency stopping a vehicle on a snow-capped road according to the present invention, in which FIG. 1 is a pneumatic circuit diagram and FIG. 2 is a partially cutaway perspective view of the emergency stop device. ,
Fig. 3 is a sectional view of the emergency brake air valve, Fig. 4 is a side view of the emergency brake pedal section, Fig. 5 is a plan view of the same, Fig. 6 is a sectional view of the preparation air valve, and Fig. 7 is a plan view of the same. ,
FIG. 8 is a schematic side view showing the position of the emergency stop device, and FIGS. 9(a) to (c) are schematic side views showing the operating state of the emergency stop device. ■... Emergency stop device 2... Front wheel 3... Chassis frame 4... Rails 5d, 5b... Slide roller 8... Frame 7... Frame 8.
・・Sliding hole 9・・Stopper 10・Shocking abbreviation 11・・Main shaft 12・・Grain shaft 13a, 1
3b...Shaft 14...Return spring 15...Claw body 16...1 impact spring 17...Adjuster 18...Shock absorber 18a...
Compression coil spring 18... Air cylinder 20... Air supply pipe 21... Emergency brake air valve 22.
・Preparation air valve 23 ・Air tank 24 ・・
・E7”-25...Valve seat 26...Valve body
27... Compression coil spring 28... Valve shaft
29...Emergency brake pedal 30...
Pressing rod 31... Outlet port 32... Inlet port 33... Main brake pedal 34...
Connecting plate 35...Asia toner/ )3
6...Compression coil spring 37...-fn38...
Pode 39... Negative air hole 40... Exhaust hole
41...Lever 42...Exhaust pipe
43... Stop switch 44... Stop switch Fig. 1 Fig. 5 j Fig. 8 Fig. 9

Claims (3)

[Claims] (1) With one action, the main brake pedal and the emergency brake pedal are activated in sequence, and the extensible body of the emergency stop device is extended by the pressurized fluid supplied by the activation of the emergency brake pedal, and the claw body provided at the tip of the extensible body lands on the ground. A method for emergency stopping a vehicle on a snow-capped road, characterized by stopping the vehicle in combination with the braking force of a main brake. (2) The method for emergency stopping a vehicle on a snow-capped road according to claim 1, wherein the emergency stopping device is provided immediately behind the front wheels. (3) When pressurized fluid is supplied to the emergency brake air valve activated by pressing the emergency brake pedal, the pilot lamp for preparing the emergency stop device and the following vehicle warning light provided at the rear of the vehicle light up in one color. On a snow-capped road according to claim 1 or 2, the pilot lamp for operating the emergency stop device and the following vehicle warning lamp are lit in another color when the emergency brake pedal is pressed. How to stop a vehicle in an emergency.