JPH0966704A - Device for preventing automobile slipping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the amount of sand to be used by arranging a spray driving means between an on-vehicle container and the outlet opening of a pipe-like means and causing the sprinkling driving means to use a blower motor having a plurality of fins in its rotary shaft. SOLUTION: A storage tank 22 has an outlet for sand 21 provided in its lower end part so as to drop down the sand 21. A pipe 23 is arranged along a path P rising from a lower point D toward a blower motor 30. A controller 35 drives the blower motor 30 by a signal from a manual switch 36 or a brake sensor 37 provided in a car room. The sand 21 located in the lower side of the storage tank 22 is sucked upward by a negative pressure made by a fin 32, transferred to a rear stage and sprinkled from the outlet opening of the pipe 23 to the front of a tire. Suction and transfer are performed by the rotational negative pressure of the fin 32 and thus, the amount of sprinkling the sand 21 is controlled to be small compared with free falling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing automobiles from slipping by spraying sand.

[0002]

2. Description of the Related Art Various techniques have been proposed for spraying sand toward the front of a tire in order to prevent a vehicle from slipping during the winter when the road surface freezes. The sand to be sprayed is stored in a vehicle tank, and the required amount of sand is sprinkled in front of the tire with an operating switch. At this time, there are roughly two drive systems. One is the method of forced spraying with compressed air, and the other is the method of opening the valve to let the sand fall freely.

FIG. 3 shows a mechanism for forcibly spraying sand by using compressed air (Shokai 61-38202).
issue). In response to a command from the control unit 1, the air opening / closing valve 2 is opened, and compressed air is sent from the pressure air supply pipe 3 to the subsequent stage, while the opening / closing valve 5 provided below the tank 4 is opened to drop the sand and ejector. The sand and air are mixed by 6 and the sand is forcibly sent to the tire side through the transport pipe 7. Reference numeral 8 is a manual switch provided in the vehicle compartment, and 9 is a brake oil pressure sensor.

On the other hand, FIG. 4 shows a type in which the valve 11 provided below the tank 10 is opened to allow the sand 12 to fall freely (Actual Publication No. 2-54703). Valve 11
Is opened by driving the exhaust cylinder 16 via a vacuum device (not shown) and the intake pipe 15. The valve 11 is formed by forming a spray hole in the panel, and by sucking the panel, the spray hole is moved to the position of the sand pipe 17 and the sand is dropped. In addition, 18 is a return spring.

[0005]

The conventional slip prevention device has the following problems. First of all, the forced spraying method using compressed air requires a complicated mechanism such as a compressor and a valve, but a general private car has a limited mounting space and power, so a complicated mechanism is adopted. Difficult to do. Especially in the winter, heaters that consume a lot of electricity are often used, so it is necessary to avoid power consumption as much as possible. Further, as the number of valves increases, the probability of occurrence of failure increases, such as the sprayed sand is caught in the valve's minute mechanism and interferes with normal operation. Further, in the device shown in FIG. 3, since the ejector (6) that mixes air and sand is used, the possibility of causing clogging cannot be denied.

[0006] An automobile requires more complicated maintenance than a general device and requires much time and cost. Therefore, mechanically, it is necessary to reduce the number of parts and further reduce the probability of failure. So, the actual freefall of sand 2-5
Looking at the invention described in No. 4703, since sand can be sprayed with a simple valve mechanism, it seems that the problem of maintenance can be solved for the time being. However, since the valve is driven to drop the sand from the spray hole, the amount of sand used tends to increase. For this reason, it is troublesome to frequently check the remaining amount of sand in the tank, and if the inspection and the replenishment of sand are neglected, the problem that the intended purpose cannot be achieved during an emergency stop where a sudden braking is really required tends to occur. On the other hand, considering the amount of sand used, even on a frozen road surface, it is possible to sufficiently enhance the braking force by spraying a small amount of sand. It takes a little more sand to escape from a rut on a snowy road, but still not enough to allow the sand to fall freely from a storage tank.

Therefore, in view of the peculiarities of an automobile having a small mounting space, an object of the present invention is to reduce the number of parts, downsize the mechanism, and efficiently adjust the amount of sand used for slip prevention. In point.

[0008]

In order to achieve the above object and achieve the object, a vehicle slip prevention device according to the present invention comprises a vehicle-mounted container and tubular means for connecting the vehicle-mounted container and a front position of a tire. As a technical premise, a spray drive means is provided between the on-vehicle container and the discharge opening of the tubular means on the basis of a device provided with a spray drive means for transferring the sprayed sand stored in the on-vehicle container to the tire side in response to the drive switch. On the other hand, the dispersal drive means uses a blower motor having a plurality of fins on its rotary shaft, and the tubular means has a descending part that rises from the vehicle-mounted container and an ascending part that rises from this descending part and communicates with the fins. Equipped with.

[0009]

The anti-slip device according to the present invention transports sand on the air flow generated by the rotation of the blower motor. Do not use the valve. The blower motor is the only mechanism operated by the operation switch in the passenger compartment. The amount of sand sprayed is controlled by the rotation speed or operating time of the blower motor.

In the present invention, the blower motor is arranged between the sand storage tank and the discharge port of the transfer pipe. The negative pressure created by the fins fixed to the motor rotation shaft sucks sand in the front stage of the motor and forcibly conveys it to the discharge opening in the rear stage.
At this time, if a large amount of sand in the storage tank flows into the blower motor rotary shaft (fin) at one time, the rotary shaft may be clogged. Therefore, in the present invention, the sand transfer pipe in the portion from the storage tank to the blower motor is formed in a substantially U shape, and the sand dropped downward from the storage tank is sucked by the negative pressure of the blower motor. The sucked sand always rises with the flow of air and is sent to the latter stage. Since there is a rising part in the movement path of sand,
The sand moves upward in accordance with the rising air flow, and free fall of only the sand is prevented.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an example of a slip prevention device according to the present invention. This anti-slip device 20 uses sand 2
No. 1 storage tank 22, a pipe 23 serving as a movement path of the sand 21, and a blower motor 30 forcibly moving the sand 21.
With. Reference numeral 35 is a controller for controlling the blower motor 30, 36 is a manual switch provided in the vehicle compartment, and 37 is a brake sensor.

The storage tank 22 is housed in an extra space in the front hood 25 as shown in FIG. 2, for example. The volume is not limited, but a volume of about 1 to 2 liters is sufficient for practical use. It is desirable that the storage tank 22 be formed of a resin material that is not deformed by running vibration or engine heat. Further, since it is removable in the summer when it is not used, it is desirable to fix it by a detachable means such as a hook or a bolt (or screw).

The pipe 23, which is the transfer path of the sand 21, is preferably a flexible resin tube and is arranged by freely selecting a path from the engine room 26 to the tires 27 and 28. The rear end of the pipe 23 is connected to the storage tank 22, and the discharge opening at the rear end is guided to the front position of the tire (tires 27 and 28 in this embodiment). Further, since the blower motor 30 is located at the intermediate portion, the motor main body, or at least the outer peripheral portion of the fin 32 fixed to the rotating shaft 31, is covered to prevent the sand from being exposed. The pipe 23 therefore has a slight bulge (24) in the middle. In the figure, the connecting portion between the rear end portion of the pipe 23 and the storage tank 22 is shown as being integrally molded, but this portion is shown as a tank (2
2) It suffices to fit the discharge port provided at the lower end and the end of the separate pipe 23.

The storage tank 22 has a sand discharge port at the lower end. This is because the sand is once dropped. Further, the pipe 23 is arranged so as to follow a path that rises from the descending point D toward the blower motor 30. The part indicated by the symbol P is the ascending path. In order to provide the ascending path P, the inclined surface R is provided in the lower part of the storage tank 22 in this embodiment, and the pipe 23
The wiring distance was short-circuited. In FIG. 1, the pipe (the portion indicated by the reference sign Q) at the rear stage of the blower motor 30 is shown in a descending position, but this is because it is premised that the distance to the front wheel (27) is short, and the sand 21 A horizontal path may be used as long as it is not impossible to transfer.

A brake sensor 37 for controlling the controller 35 detects sudden braking. This is because it is not necessary to sprinkle sand even during normal traffic light stopping and braking at intersections. That is, the brake sensor 3
No. 7 needs to be activated when the brake pedal is stepped on abnormally strongly, and at this time, there is a high probability that slippage will occur on a frozen road surface, so sand is sprinkled to increase the braking force. More specifically, a detection switch (sensor) that operates when the brake pedal is stepped on more strongly than a predetermined threshold value is provided.
Since the detection sensor can be configured to judge ON / OFF of the strength of the stepping force in the simplest manner by the repulsive force of the spring,
For example, it can be configured so that it does not turn on with a stepping force such as a brake confirmation operation when the intersection is stopped. Further, by detecting the stepping speed of the brake pedal, it is possible to distinguish between a normal brake operation and an emergency stop brake operation. The emergency braking may be detected by the brake hydraulic pressure (flow rate).

Therefore, according to such a slip prevention device,
The controller 35 drives the blower motor 30 by a signal from the manual switch 36 or the brake sensor 37 provided in the vehicle compartment. Then, due to the negative pressure created by the fins 32, the sand 21 located below the storage tank 30 is sucked upward, transferred to the subsequent stage, and sprayed from the discharge opening of the pipe 23 toward the front of the tires 27 and 28. .

Since the suction transfer is performed by the negative pressure of the rotation of the fins 32, the amount of the sand 21 sprayed can be controlled to be smaller than that in the free fall. In addition, the response speed in an emergency is superior to the free fall from the spray hole. If it is necessary to increase the amount of sand used as in a rut on a snowy road, the blower motor 30 can be operated at a desired timing by the manual switch 36 to spray a required amount of sand 21.

Since this device does not use a valve mechanism,
In winter, for example, even under an outside temperature condition such as -10 ° C to 20 ° C, a non-operation accident due to freezing of members does not occur. The motor rotating shaft 31 operates normally even if ice and snow adhere under low temperature conditions, and sprays the sand 21 reliably.

Although the discharge opening of the pipe 23 is basically designed so that the sand 21 is sprayed in front of the tires (27, 28), the tires (27, 28) are wet on a snowy road. Therefore, the sand 21 can be attached even if the sand 21 is directly blown below the front middle portion of the tire, and the braking force can be increased. It is also conceivable that a slight misalignment between the sand spraying position and the tire advancing direction may occur due to steering wheel operation in an emergency, but if an expansion nozzle is provided at the discharge port to spread the sand, the sand will be scattered. The initial objective of improving braking is certainly achieved. In addition, a moisture absorbent such as charcoal powder may be mixed in order to prevent the sprayed sand from freezing.

[0020]

As described above, according to the slip prevention device of the present invention, the failure probability of the device can be reduced by a small number of parts, the mechanism can be downsized, and the amount of sand used can be efficiently adjusted. Can be

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a slip prevention device according to the present invention.

FIG. 2 is a diagram illustrating a state in which the device of FIG. 1 is installed in a private vehicle.

FIG. 3 is a diagram showing a conventional slip prevention device.

FIG. 4 is a diagram showing another example of the mechanism of a conventional slip prevention device.

[Explanation of symbols]

 20 Anti-slip device 21 Sand 22 Storage tank 23 Pipe 25 Front hood 26 Engine room 27, 28 Tire 30 Blower motor 35 Controller 36 Manual switch 37 Brake sensor P Pipe ascending part D Pipe descending part Q Pipe descending part

Claims (1)

[Claims] 1. An on-vehicle container, a tubular means for connecting the on-vehicle container to a front position of a tire, and a spray driving means for transferring the sprayed sand stored in the on-vehicle container to the tire side in response to a drive switch. In a vehicle slip prevention device comprising, while the spray drive means is arranged between the vehicle-mounted container and the discharge opening of the tubular means, the spray drive means uses a blower motor provided with a plurality of fins on the rotating shaft, and the tubular means, An anti-slip device for a vehicle, comprising: a descending part that descends from a vehicle-mounted container, and an ascending part that rises from this descending part and communicates with the fins.