JPH08119068A - Window glass foreign matter adhesion preventing device - Google Patents

Abstract

PURPOSE: To operate a car comfortably without interfering the view of a driver and, in addition, without producing noises such as sliding noise, driving noise, etc. CONSTITUTION: A compressor which takes in and compresses fresh air and a jet nozzle 5 which is connected to the delivery port of the compressor 3 and ejects compressed air compressed by the compressor 3 toward the outer surface window glasses are installed on a car body 1.

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 foreign matter from adhering to a window glass for removing rain adhering to the window glass of an automobile.

[0002]

2. Description of the Related Art Conventionally, rain, snow, dust and the like adhering to the front window glass of an automobile are removed by an electric wiper that reciprocates while sliding on the outer surface of the front window glass.

[0003]

However, the wiper, which is one example of the conventional foreign matter adhesion preventing device for a window glass, reciprocates while sliding on the outer surface of the front window glass during operation. Was hindering his visibility and making it difficult to drive.

In addition, since the wiper slides on the outer surface of the window glass, the sliding contact portion of the wiper is damaged by abrasion, and it is necessary to replace the wiper regularly.

The present invention has been made in view of the above-mentioned drawbacks, and it is not necessary to replace the foreign matter and to prevent foreign matter from adhering to the window glass which allows comfortable driving without hindering the driver's view. The purpose is to provide a device.

[0006]

[Means for Solving the Problems] Means adopted by the present invention for achieving the above object are a compressor for taking in and compressing external air, and compressed air which is connected to a discharge port of the compressor and compressed by the compressor. And a jet nozzle for jetting the jet toward the outer surface of the window glass.

[0007]

According to the apparatus for preventing foreign matter from adhering to the window glass according to the present invention, the compressor takes in air from the outside and compresses it. Then, the compressed compressed air is ejected toward the outer surface of the window glass from the ejection nozzle connected to the ejection port. The compressed air jetted from the jet nozzle flows along the outer surface of the window glass and blows off the rain falling toward the window glass.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the device for preventing foreign matter from adhering to a window glass according to the present invention is installed in the hood of a vehicle body 1. It is composed of an air pump unit 3, an air pipe 4, an injection nozzle 5, and an air hose 6.

The air pump unit 3 includes a compressor 3
a, an air tank 3b, a power transmission unit 3c, a pressure control unit 3d, and a box 3e.

The compressor 3a is for compressing air taken in from the outside, and is constructed by providing several stages of rotary vanes (not shown) in a cylindrical casing. Further, air introducing pipes 30a and 31a for introducing air from the outside are formed at one end inside the casing forming the compressor 3a. The air introduction pipe 30a has an introduction port provided near the radiator, and introduces the air warmed by the radiator into the casing. On the other hand, the air introduction pipe 31a is provided at a position apart from the radiator, and guides unheated outside air into the casing.

The air tank 3b is a portion for storing the compressed air from the compressor 3a and is formed of a tubular container. The space in the air tank 3b is connected to the connecting pipe 30.
b communicates with the compression space of the compressor 3a. A discharge hole 31b for discharging compressed air is provided at the other end of the air tank 3b, and the discharge hole 31b is connected to the air hose 6.

The power transmission portion 3c is a portion for transmitting the rotation output of the engine 1a to the compressor 3a, and one of the first belt 30c is wound around the engine 1a.
And a first pulley 31c hung over the other side of the first belt 30c, an electromagnetic clutch 32c attached to the first pulley 31c, and an electromagnetic clutch 32.
A second pulley 33c connected to the first pulley 31c via c, a second belt 34c whose one end is wound around the second pulley 33c, and a second belt 34c.
Centrifugal pulley 35c hung over the other side of the clutch and the clutch 3 mounted on the rotary shaft of the centrifugal pulley 35c.
And 6c.

The pressure sensing unit 30d is provided in the air tank 3b and outputs the pressure in the air tank 3b to the pressure control unit 3d as a pressure conversion voltage converted into a voltage corresponding to the height of the pressure.

The pressure control unit 3d is composed of a comparison circuit (not shown) and an output unit (not shown). The comparison circuit receives the pressure conversion voltage converted by the pressure sensing unit 30d and converts the pressure. The voltage is compared with the voltage corresponding to a preset predetermined pressure. Based on the comparison result, the output unit controls each unit so that the pressure of the air in the air tank 3b becomes a desired pressure.

The box 3e has a rectangular bottom surface, and a compressor 3a, an air tank 3b, a power transmission section 3c, a pressure control section 3d, and a pressure sensing section 30d are housed therein. It is installed in the hood of the automobile body 1.

As shown in FIGS. 3 and 4, the air pipe 4 is
It is composed of a character-shaped pipe 4a, a nozzle mounting pipe 4b, a connecting pipe 4c, and a lid portion 4d. Bearings (not shown) are embedded in the inner peripheral edges of both openings of the T-shaped tube 4a to form a fitting insertion portion 40a. The embedded bearing is urged so that a part of the bearing is projected inward in the radial direction of the air tube.

Further, the nozzle mounting tube 4b has openings at both ends thereof,
The fitting insertion portion 40a of the T-shaped tube 4a or the fitting protrusion 40b to be inserted into the connection fitting portion 40c is formed, and the injection is performed on a part of the peripheral surface of the fitting protrusion 40b. A nozzle mounting protrusion 41b for mounting the nozzle 5 is projected.

The groove 42 is formed on the peripheral surface of the fitting protrusion 40b.
b is formed, and when the fitting protrusion 40b is inserted into the fitting insertion portion 40a of the T-shaped pipe 4a or the connection fitting portion 40c of the connection pipe 4c, the fitting insertion portion is inserted into the groove 42b. Four
The 0a bearing (not shown) fits. On the other hand, a groove 43b that fits with a bearing provided in the nozzle fitting portion 5b of the injection nozzle 5 is also formed on the peripheral surface of the nozzle mounting protrusion 41b.

Further, connection fitting portions 40c having the same construction as the fitting insertion portion 40a are formed at both ends of the connection pipe 4c.

Connection pipes 4 used at both ends of the air pipe 4
A lid portion 4d is attached to one of the connection fitting portions 40c of c so that compressed air does not leak from the opening. The lid portion 4d is formed of a thick cylindrical body, one end surface of which has a protrusion 41d that fits into the connection fitting portion 40c, and the other end surface that penetrates the lid portion 4d. A non-threaded screw hole 40d is formed. A mounting screw is inserted into the screw hole 40d when the air tube 4 is attached to the automobile body 1.

The injection nozzle 5 has a tapered cylindrical body of approximately 70.
It is formed by curving every time. An injection hole 5a is formed at one end thereof, and an intake port is formed at the other end thereof. The nozzle mounting protrusion 4 is provided on the suction port side.
A nozzle fitting portion 5b that rotatably fits with 1b is formed. The structure of the nozzle fitting portion 5b is the fitting insertion portion 40.
same as a.

The assembly of the air tube 4 and the injection nozzle 5 will be further described. First, at both ends of the T-shaped tube 4a,
The nozzle mounting pipe 4b is connected, and the connecting pipe 4c is connected to one end of the nozzle mounting pipe 4b. This connected connection tube 4c
The nozzle mounting pipe 4b is connected to the other end, and the other end, which is not connected, is covered with the cover 4d. This allows the air tube 4
Is assembled. The injection nozzle 5 is attached to the nozzle attachment pipe 4b of the assembled air pipe 4.

As shown in FIGS. 2 and 5, when the engine 1a is started with the switch 1c of the foreign matter adhesion preventing device for the window glass being turned off, the rotation output of the engine 1a is the first. It is transmitted to the first pulley 31c by the belt 30c. However, the electromagnetic clutch 32
Since c is not operating, the transmitted first pulley 31
The rotation output of c is not transmitted to the second pulley 33c, and the compressed air is not jetted from the jet nozzle 5.

Also, after the engine 1a is started, the switch 1
When c is inserted, the rotation output of the engine 1a is transmitted to the first pulley 31c by the first belt 30c. First
The rotational output transmitted to the pulley 31c is transmitted to the second pulley 33c via the electromagnetic clutch 32c that is operating. The rotation output transmitted to the second pulley 33c is the second
The belt 34c is transmitted to the centrifugal pulley 35c. Then, the rotation output of the centrifugal pulley 35c is transmitted to the rotary blades of the compressor 3a via the clutch 36c and rotates the rotary blades. Compressed air is sent into the air tank 3b by the rotating blades. The compressed air in the air tank 3b is the air hose 6 and the air pipe 4.
It passes through the inside and is injected from the injection hole 5a of the injection nozzle 5 to the window glass 1d on the front surface of the automobile body 1.

The pressure sensing unit 30d applies a pressure conversion voltage having a height corresponding to the pressure in the air tank 3b to the pressure control unit 3d.
When the pressure in the air tank 3b becomes equal to or higher than a predetermined height, the pressure sensing unit 30d sends a pressure conversion voltage having a height corresponding to the pressure to the pressure control unit 3d. When the pressure conversion voltage of the corresponding height is higher than the voltage of the height corresponding to the preset pressure, the pressure control unit 3d judges this and opens the valve (not shown) to compress from the exhaust hole 31d. Let air escape. As a result, abnormal pressure increase in the air tank 3b is prevented, and the pressure in the air tank 3b is maintained at a predetermined height.

When the pressure in the air tank 3b becomes lower than a predetermined value, the pressure sensing unit 30d outputs a pressure conversion voltage having a height corresponding to the pressure in the air tank 3b to the pressure control unit 3d. When the pressure control unit 3d determines that the pressure conversion voltage sent from the pressure sensing unit 30d is lower than the voltage of the height corresponding to the predetermined pressure set in advance, the pressure control unit 3d increases the output of the engine 1a to cause the compressor 3a to move to air. To increase the amount of air stored in the air tank 3b. As a result, the pressure in the air tank 3b rises and reaches a predetermined height. That is, compressed air is jetted from the jet nozzle 5 at a predetermined pressure. The air tank 3b
The internal pressure is preferably about 3 atm.

Furthermore, the cold outside air is compressed by the compressor 3a in winter.
If the air is taken in and compressed and injected from the injection nozzle 5 to the front window glass 1d, the front window glass 1d may be cooled and may become cloudy. In this case, when the warm air injection signal is sent to the pressure control unit 3d, the pressure control unit 3d closes the air introduction pipe 31a of the compressor 3a and opens only the air introduction pipe 30a. Since the introduction port of the air introduction pipe 30a is provided in the vicinity of the radiator, the air warmed by the radiator is introduced into the compressor 3a from this introduction port.
The warmed air passes through the air tank 3b and the air pipe 4, and is blown from the injection nozzle 5 to the window glass 1d.

As described above, the compressed air jetted from the jet nozzle 5 is blown onto the outer surface of the window glass 1d and flows along the surface of the front window glass 1d. When the rain w falls in this state, the rain w is prevented from adhering to the front window glass due to the flow of the jetted air. Further, the rain w adhering to the front window glass 1d is pushed upward with the flow of air and eliminated.

That is, the device for preventing foreign matter from adhering to the window glass having the above-described structure can remove the rain w adhering to the window glass 1d on the front side in a non-contact manner.
When the front window glass 1d is frozen in winter, the air warmed by the radiator 1a can be blown to melt it. Further, since the wiper is not used, it is possible to drive comfortably without obstructing the visibility.

The air pump unit 3 is the engine 1a.
Although air is compressed by using the rotation output of the engine as a drive source, the rotation output of the engine 1a is not limited to the one using the rotation output of the engine 1a as the drive source, and may be driven by taking electric power from a battery. In this case, the operation of the air pump unit 3 can be electrically controlled, and the operation control becomes simple. In addition, as long as the electric power from the battery can be obtained, it can be installed in a desired space regardless of the position of the engine 1a. For example, it can be mounted under the floor of the automobile body 1.

As shown in FIGS. 3 and 4, the air pipe 4 is T
The character-shaped pipe 4a, the nozzle mounting pipe 4b, the connecting pipe 4c, and the lid portion 4d are assembled by being fitted or inserted into each other. Can be assembled. Further, the injection nozzle 5 can be arranged at a position suitable for the usage state. For example, as shown in FIG. 6, the same number of injection nozzles 5 are provided on the driver's seat side and the passenger's seat side, but the number of injection nozzles 5 provided on the passenger's seat side is reduced to perform injection on the driver's seat side. The number of nozzles 5 can be increased, and the injection nozzle 5 can be arranged at a position suitable for the usage situation.

The above apparatus for preventing foreign matter from adhering to the window glass can be used alone or sufficiently, but may be used together with a wiper. In this case, for example, bird droppings or the like adhere to the window glass 1d. Even if the adhesion is strong and the ejection from the ejection nozzle 5 is not sufficient, it can be removed by driving the wiper.

Further, it may be used together with a water repellent coating agent such as a silicon liquid which can repel rain by applying it to the window glass 1d. In this case, the front window glass 1d repels rain, so that the rain can be removed more effectively. In addition, the device for preventing foreign matter from adhering to the window glass is equipped with a window glass 1 on the front side.
Since it does not slide on the surface of d, the front window glass 1
The water-repellent coating agent applied to d was not scraped off. The effect of the water-repellent coating agent can be maintained for a long time.

[0034]

As described above, the apparatus for preventing foreign matter from adhering to a window glass according to the present invention is capable of non-contactly removing the rain or the like that is trying to adhere to the window glass by blowing air onto the window glass with an injection nozzle. It is possible to drive comfortably without obstructing the visibility because it does not need to be replaced regularly due to wear.

[Brief description of drawings]

FIG. 1 is a fragmentary perspective view showing a foreign substance adhesion preventing device for a window glass according to an embodiment of the present invention.

FIG. 2 is an enlarged schematic cutaway view showing an air pump unit of the foreign matter adhesion preventing device for a window glass according to an embodiment of the present invention.

FIG. 3 is an assembly view showing an ejection nozzle of a foreign matter adhesion preventing device for a window glass according to an embodiment of the present invention.

FIG. 4 is an enlarged view of an essential part showing a jet nozzle of a foreign matter adhesion preventing device for a window glass according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating an example of use of the foreign substance adhesion prevention device on a window glass according to an embodiment of the present invention.

FIG. 6 is a fragmentary perspective view showing an arrangement of injection nozzles.

[Explanation of symbols]

 1 Car Body 1a Engine 1c Switch 1d Window Glass 3 Air Pump Unit 3a Compressor 3b Air Tank 3c Power Transmission Section 3d Pressure Control Section 3e Box 4 Air Pipe 5 Injection Nozzle 6 Air Hose

Claims (1)

[Claims] 1. A compressor comprising: a compressor for taking in and compressing external air; and a jet nozzle connected to a discharge port of the compressor and jetting compressed air compressed by the compressor toward an outer surface of a window glass. A device to prevent foreign matter from sticking to the characteristic window glass.