JPS61188255A - Washer solution feeding device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a lag time with which a washer solution is injected from a nozzle after a pump is driven, by a method wherein a device is constituted such that the washer solution can be held in a pipe through which the pump is coupled with the nozzle. CONSTITUTION:A leak flow passage 30 formed with a 3-way joint 18, a drain pipe 19, and a leak valve 20, is located to a lower part in the vicinity of a front nozzle 17. When a washer solution is fed, a flow passage switching valve 13 is energized to drive a pump 12. This causes the washer solution to be fed to the front nozzle through a front pipe 16. In which case, the washer solution flows to the leak valve 20 through the 3-way joint 18 and a drain pipe 19, but since a pressure produced by the action of a pump is exerted on the washer solution, a ball 22 is pressed against a sheet 23 to prevent leak of the washer solution. When injection is stopped, a valve 13 in the front pipe is closed, and this causes the washer solution to be held in the front pipe 16.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a washer fluid supply device for supplying washer fluid for cleaning automobile windows and the like.

"Prior Art" An example of a conventional washer fluid supply device is shown in FIG. This washer fluid supply bag N50 is for injecting washer fluid onto the front window glass F or rear window glass R of the automobile A, and the tank 51. Pump 52.
Flow path switching valve 53. Rear pipe 54. Rear nozzle 55. It basically consists of a front pipe 56 and a front nozzle 57.

When the flow path switching valve 53 is energized, the front side is selected and the rear side washer fluid supply path is cut off.

On the other hand, if the power supply is cut off, the rear side is selected and the front side washer fluid supply path is cut off.

Therefore, if the pump 52 is activated after selecting either the front or the rear with the flow path switching valve 53, the washer fluid is injected only onto the window glass on the selected side.

"Problems with the Prior Art" In the washer fluid supply device 5o shown in No. 31!21, when the washer fluid supply device 50 is stopped, the flow path switching valve 53 is de-energized on the front side. The washer fluid supply path is cut off, and the washer fluid is retained in the front pipe 56.

``The reason why the washer fluid is kept in the front pipe 56 in this way is to eliminate the delay time between when the pump 52 is activated and when the washer fluid is injected from the front nozzle 57. That is, if the front pipe 56 is emptied, the front pipe 56 will be filled with washer fluid after the pump 52 is activated.The washer fluid will not be ejected from the front nozzle 57 until then, causing the aforementioned delay time.
is long, so this delay time also becomes long. By storing washer fluid in the front pipe 56 in advance, this delay time is eliminated.

Further, the reason why the pulp is applied in this way is to prevent washer fluid from being forced out from the front nozzle 57 when sudden acceleration is applied or when the vehicle body is tilted. That is, this is because one side of the flow path switching valve 53 is completely blocked.

By the way, when the front pipe 56 contracts due to a change in temperature, or when air is present in the front pipe 56 and thermally expands due to a rise in temperature, the washer fluid held within the front pipe 56 is pushed out from the front nozzle 57. Sometimes.

However, in this way, the washer fluid flows to the front nozzle 57.
If it is pushed out, there is a problem that it will leave unsightly traces on the front window glass F and the body. .

[Object of the Invention] An object of the present invention is to provide a washer liquid supply device that can hold washer liquid in a pipe connecting a pump and a nozzle and prevent the washer liquid from being forced out from the nozzle at an unintended time. With the goal.

[Structure of the Invention] The washer fluid supply device of the present invention is a washer of a type in which the washer fluid is retained in the washer fluid supply pipe by blocking communication between the washer tank and the washer nozzle with a normally closed valve except when the washer fluid is being supplied. In the liquid supply device, when washer liquid is being supplied, the washer liquid is in a closed state so that washer liquid does not leak from the washer liquid supply pipe, but when the washer liquid is not being supplied, it is in an open state at least temporarily, and the washer liquid in the washer pipe near the washer nozzle is kept open. A feature of the configuration-1 is that a washer fluid leaking means for leaking washer fluid is provided in a portion of the washer fluid supply pipe near and below the washer nozzle.
- "Example" ゛Hereinafter, the present invention will be further explained in detail based on the example shown in the drawings. Here, FIG. 1 is an explanatory diagram of the structure of a washer fluid supply device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a leak valve in the embodiment shown in FIG. Note that this invention is not limited to this.

In the washer fluid supply system $10 shown in FIG. Pump: 12. Flow path switching valve 13゜Rear pipe 1
4. Rear nozzle 15. The front pipe 16 and the front nozzle 17 are the same components as conventionally known components.

The difference from the conventional configuration is that a leak flow path 30 consisting of a three-way joint 18, a drain pipe 19, and a leak valve 20 is provided in a part of the front pipe 16 near and below the front nozzle 17. There are some points.

The leakage pulp 20 has a structure similar to a ball check valve, as shown in FIG. That is, a ball 22 is placed on a seat 23, and a spring 21 is attached to the ball 22. The spring 21 does not press the ball 22 against the seat 23, but functions to prevent the ball 22 from jumping unnecessarily due to vibrations of the automobile A or the like. Therefore, the ball 22 can be slightly separated from the seat 23 due to vibrations of the automobile A or the like. On the other hand, if a certain amount of pressure is applied to push the ball 22 downward in FIG.
The ball 22 is in close contact with the seat 23.

Next, the operation will be explained.

First, on the rear side, if the pump 12 is operated without energizing the flow path switching valve 13, washer fluid is injected from the rear nozzle 5 toward the rear window glass R. When the pump 12 is turned down, the injection stops, and the washer fluid in the rear pipe 14 flows back into the °ζ tank 11. As a result, the inside of the rear pipe 14 becomes empty, and when the washer fluid is supplied next time, there is a delay time required for the inside of the rear pipe 14 to be filled with the washer fluid. However, rear pipe 1
4 is short, so this waiting time is hardly a problem. Also, since the rear pipe 14 becomes empty, the rear nozzle 1
The washer fluid will not be pushed out naturally from 5.
There are no problems such as traces on the rear body.

Next, on the front side, the flow path switching valve 13 is energized and the pump 12 is operated. As a result, washer fluid is supplied to the front nozzle 17 via the front pipe 16, and the washer fluid is supplied from the front nozzle 17 to the front windshield F.
is sprayed towards.

At this time, the washer fluid flows into the three-way joint 18. The washer fluid flows into the leaked pulp 20 via the drain pipe 19, but since the washer fluid is under pressure due to the operation of the pump 12, the ball 22 is pressed against the sheet 23 by that pressure, blocking the flow. Therefore, washer fluid leakage means 3
No washer fluid leaks through the 0.

When stopping the injection, the pump 12 is stopped, and then the flow path switching valve 13 is de-energized. As a result, front pipe 1
Since the end of the pipe 6 on the flow path switching valve 13 side is closed, the washer fluid is retained within the front pipe 16.

By the way, at this time, no pressure is applied to the washer fluid in the front pipe 16, so the leak valve 20
The ball 22 is lifted from the seat 23 by vibrations of the automobile A, etc., allowing the washer fluid to flow. Therefore, the washer fluid in the front pipe 16 can flow out to the outside through the washer fluid leaking means 30.

However, the washer liquid in the pipe section from the flow path switching valve 13 to the three-way joint 18 cannot flow out because the end of the flow path switching valve 13 is sealed, and remains retained. On the other hand, the washer fluid in the area from the front nozzle 17 to the three-way joint 18 is
Since air enters through the front nozzle 17, it flows out to the outside of the city through the washer fluid leaking means 30.

As a result, the pipe portion between the front nozzle 17 and the three-way joint 1B becomes empty, and the washer fluid is no longer forced out from the front nozzle 17 due to temperature changes or the like. In other words, traces of the odor fluid are prevented from sticking to the front window glass F or the body.

On the other hand, since washer fluid is held in the pipe section from the flow path switching valve 13 to the three-way joint 18, which occupies most of the front pipe 16, there is a long delay time when the washer fluid is supplied next time. There is none.

Another example is one in which the washer fluid that has flowed out from the washer fluid leaking means 30 is returned to the tank 11.

"Effects of the Invention" According to the present invention, the washer fluid supply device is of a type in which the washer fluid is retained in the washer fluid supply pipe by blocking the communication between the washer tank and the washer nozzle with the normally closed pulp except when the washer fluid is being supplied. When the washer fluid is supplied, the pipe is closed and the washer fluid does not leak from the washer fluid supply pipe, but when the washer fluid is not being supplied, it is at least temporarily open and the washer fluid in the washer pipe near the washer nozzle leaks. A washer fluid supply device is provided, characterized in that a washer fluid leakage means is provided in a portion of the washer fluid supply pipe near and below the washer nozzle, whereby the washer fluid leakage means is provided in the washer fluid supply pipe section below the washer nozzle. This eliminates the delay time and prevents washer fluid from naturally flowing out of the nozzle and leaving unsightly traces.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of a washer fluid supply device according to an embodiment of the present invention, FIG. 2 is a sectional view of a leak valve in the embodiment shown in FIG. 1, and FIG. 3 is an example of a conventional washer fluid supply device. FIG. (Explanation of symbols) 10... Washer fluid supply device 11... Tank 12... Pump 13.
...Flow path switching valve 14...Rear pipe 15...
Rear nozzle 16...Front pipe 17...
Front nozzle 18... Three-way joint 19...
Drain pipe 20...Leaking pulp 21...Spring 22...Ball 23...Seat 30...Washer fluid leaking means.

Claims (1)

[Scope of Claims] 1. A washer fluid supply device of a type in which a normally closed valve shuts off communication between a washer tank and a washer nozzle and holds washer fluid in a washer fluid supply pipe except when washer fluid is being supplied. When fluid is being supplied, the washer fluid is closed and the washer fluid does not leak from the washer fluid supply pipe, but when the fluid is not being supplied, it is at least temporarily open and the washer fluid in the washer pipe near the washer nozzle leaks. A washer fluid supply device characterized in that the means is provided in a portion of the washer fluid supply pipe near the washer nozzle and below the washer nozzle.