JPH0159191B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a vacuum fluid supply device for supplying hydraulic fluid for equipment that uses hydraulic pressure, such as automobile brake fluid, to a container such as a reservoir tank. Regarding.

(Prior Art) As a conventional vacuum liquid supply device (also referred to as a liquid supply filler), for example, one described in Japanese Patent Application Laid-open No. 123300/1983 is known.

This conventional device has a head (liquid supply port, vacuum outlet)
It was equipped with a filler assembly (filler main body) having a filler assembly, a filling circuit, a salvage circuit, and a vacuum circuit provided in communication with the head, and an electromagnetic on-off valve for opening and closing each circuit.

To explain the liquid supply procedure, first, a setting step is performed in which the head is set in the opening of the container. Next, the solenoid valve of the evacuation circuit is opened to perform a vacuum evacuation step in which the container and the air in the circuit connected to the container are sucked through the evacuation circuit and the head to create a vacuum. Then, the solenoid valve of the vacuum suction circuit is closed and the solenoid valve of the filling circuit is opened to perform a liquid supply step of supplying liquid to the container side via the filling circuit. Next, the solenoid valve of the filling circuit is closed and the solenoid valve of the salvage circuit is opened for a short time to perform an initial recovery step of recovering most of the liquid remaining in the filler assembly. Thereafter, the solenoid valve of the salvage circuit is closed, the solenoid valve of the vacuum suction circuit is opened, and a vacuum circuit recovery process is performed in which the remaining small amount of liquid adhering to the filler assembly is sucked out over a sufficient period of time.

In this manner, the residual liquid in the filler assembly was completely recovered, and the residual liquid did not enter the vacuum circuit during the vacuuming process in the next cycle, thereby preventing deterioration of the vacuuming performance.

(Problems to be Solved by the Invention) However, in such conventional devices, since the residual liquid adhering to the filler assembly is collected by vacuuming,
There was a problem in that a long time was required to completely recover the residual liquid, resulting in a longer work cycle.

Note that if compressed air is simply used to collect this residual fluid, the compressed air is injected into the container from the head, and problems may occur if moisture in the air gets mixed in, such as with brake fluid. It was unsuitable for use in supplying the resulting liquid (Japanese Patent Application Laid-Open No. 52-1999 was used to blow away residual liquid with compressed air).
143057).

(Means for Solving the Problems) That is, the present invention provides a vacuum liquid supply device that recovers residual liquid in order to prevent deterioration in vacuuming performance for each liquid supply and eliminate filling defects. This was done for the purpose of shortening the working time and preventing moisture from getting into the air.To achieve this purpose, the present invention includes a fitting part that can fit into the opening of the container on the filler body. A filler opening is formed in the fitting portion and opens toward the inside of the container in a fitted state with the opening, and one end of the liquid supply path is connected to the communication path communicating with the filler opening. The liquid supply port is opened, and the other end of the liquid supply path is connected to the liquid storage tank, and the vacuum suction port at one end of the vacuum path is opened to the communication path, and the other end of the vacuum path is connected to the vacuum suction device. A salvage path that is connected to the liquid supply path and communicates with the atmosphere is branched off, the vacuum path is provided with a first valve that opens when the vacuum is drawn, and the liquid supply path is provided with a first valve that opens when the liquid is supplied. A second valve is provided in the salvage path, and a third valve that is opened during salvage is provided in the vacuum path at a position on the vacuum suction port side near the first valve,
A supply port at one end of the compressed air path is opened, and the other end of the compressed air path is connected to a compressed air supply device, and the compressed air path is provided with a fourth valve that is opened when compressed air is sent. The filler opening is provided with an opening/closing means for opening and closing the filler opening with respect to the container.

(Function) Therefore, when supplying liquid using the vacuum liquid supply device of the present invention, after evacuation is performed using the vacuum path, the liquid is supplied using the liquid supply path, and then the salvage path is used to supply the liquid. Perform salvage to remove excess liquid.

After salvage, the filler opening is first closed by the opening/closing device. In this state, the liquid supply port and the vacuum port are in communication via the communication path, and both ports are closed to the container by the opening/closing means.

Next, open the third valve to open the salvage path to the atmosphere, and open the fourth valve of the compressed air path to supply compressed air from the compressed air path to the vacuum outlet communication path liquid supply port midway through the vacuum path. By passing the liquid through the salvage path, liquid adhering to the vacuum path can be removed by the force of compressed air.

At this time, since the filler opening that opens into the container is closed by the opening/closing means, compressed air is not injected into the container, and this compressed air adds moisture in the air to the liquid in the container. There will be no contamination.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
In explaining the embodiment, an example will be taken of an apparatus for supplying brake fluid to an automobile.

First, the configuration of the embodiment shown in FIG. 1 will be explained.

Reference numeral 1 denotes a filler body, which has a fitting part 4 that fits into an opening 3 of a container 2 such as a reservoir tank, and various paths are formed inside the filler body 1. The opening 3 is provided in the portion 4 as a sealing material for sealing the opening 3 of the container 2.
An O-ring 5 is provided which contacts the inner surface of the holder.

Reference numeral 6 denotes a vacuum path, which includes a main body side vacuum path 61 opened in the filler main body 1 and a cylindrical base 8.
The main body side vacuum path 61 is provided with a first valve 9 that opens the vacuum path 6 during evacuation.

Incidentally, a vacuum pipe 11 provided with a vacuum suction device 10 is connected to the main body side vacuum path 61.

Reference numeral 7 denotes a liquid supply path, which is formed by a main body side liquid supply path 71 opened in the filler main body 1 and a mouth side liquid supply path 72 opened in the mouthpiece 8. The main body side liquid supply path 71 is provided with a second valve 12 that opens the liquid supply path 7 during liquid supply.

Note that the main body side liquid supply path 71 includes a liquid storage tank 13.
A liquid supply pipe 14 that communicates with is connected.

Reference numeral 15 denotes a salvage path, which is branched from the main body side liquid supply path 71 and opened in the filler main body 1. At the time of salvage, a part of the main body side liquid supply path 71 and the mouth side liquid supply path 72 are opened. The routes are shared, and the routes are shared.

Note that this salvage path 15 is provided with a third valve 16 that opens the salvage path 15 during salvage, and a salvage pipe 17 that is open to the atmosphere is connected to the salvage path 15.

Incidentally, the cap 8 is provided with a vacuum inlet 63 as an opening at the tip of the cap side vacuum path 62, and a liquid supply port 73 as an opening at the tip of the cap side liquid supply path 71. A communication path 10 that communicates the vacuum port 63 and the liquid supply port 73
0 is formed. Further, at a side position of the communication path 100 on the lower end side surface of the cap 8, an opening is formed toward the inside of the container 2 when the fitting portion 4 of the filler main body 1 is fitted into the container 2. A filler opening 19 is provided.

Reference numeral 18 denotes a sliding tube as an opening/closing means, which is provided on the outer periphery of the cap 8 so as to be slidable up and down, and the filler opening 19 is opened and closed by vertical sliding of this sliding tube 18. It is something.

Note that when the sliding tube 18 is in the raised position, the filler opening 19 is open, and the liquid supply port 73 of the liquid supply path 7 and the vacuum suction port 63 of the vacuum path 6 are open to the inside of the container 2. When the sliding tube 18 is in the lowered position, the filler opening 19 is closed and the liquid supply port 73 is closed.
and the vacuum outlet 63 are in communication with each other and are blocked from the container 2.

Reference numeral 20 denotes a compressed air path, which is branched from the main body side vacuum path 61 and opened in the filler main body 1, and its supply port 201 is provided near the first valve 9 at a position on the vacuum suction port 63 side. A fourth valve 21 that opens when compressed air is sent to the compressed air path 20 is provided at the compressed air supply port 201.

Note that the compressed air path 20 includes a compressed air device 22.
A compressed air pipe 23 is connected thereto.

In addition, during air blowing with compressed air, the compressed air path 20, a part of the main body side vacuum path 61, the mouthpiece side vacuum path 62, the communication path 100, the mouthpiece side liquid supply path 72, and the main body side liquid supply path 71 and the salvage path 15 become an air blow path.

Next, the operation of the embodiment will be explained with reference to FIGS. 2 to 5.

(B) When vacuuming (Figure 2) When vacuuming, open the first valve 9, close the other valves 12, 16, and 21, operate the vacuum suction device 10, and remove the container 2 and the container 2.
After sufficient air has been removed from the piping system and equipment, the first valve 9 is closed and the vacuum suction device 10 is stopped.

(b) When supplying liquid (Fig. 3) Next, when supplying liquid, first, only the second valve 12 is opened. Then, the liquid storage tank 13 and the container 2 are in communication, and while the liquid storage tank 13 side is at atmospheric pressure, the inside of the container 2 is under negative pressure.
Due to this pressure difference, the brake fluid L in the fluid storage tank 13
The liquid supply pipe 14 main body side liquid supply path 71 mouth side liquid supply path 72 liquid supply port 73 communication path 100
It is fed into the container 2 via the filler opening 19. After that, the second valve 12 is closed.

Note that this fluid supply is carried out until the pressure difference is almost eliminated, which generally leads to excessive fluid supply, and the brake fluid L is filled up to the mouth-side liquid supply path 72 and the mouth-side vacuum path 62, as shown in FIG. be done.

(c) At the time of salvage (Fig. 4) At the time of salvage, first, only the third valve 16 is opened and a pump (not shown) connected to the salvage pipe 17 is driven. Then, the excess brake fluid L passes through the mouthpiece side liquid supply path 72, the partial salvage path 15 of the main body side liquid supply path 71, and the salvage pipe 17, and is drained to a liquid tank (not shown). Then, after a predetermined period of time has elapsed, the third valve 1
6 and stop the pump not shown.

This salvage can prevent dripping and adjust the fluid level, but since the brake fluid L is simply drained, the brake fluid remains attached.

(d) During air blowing (FIG. 5) As described above, after salvage is performed, first move the sliding tube 18 downward to close the filler opening 19. In this state, the liquid supply port 73 of the cap side liquid supply path 72 and the vacuum outlet 63 of the cap side vacuum path 62 are in communication via the communication path 100, and both ports 63, 73 are connected to the container 2. It is cut off from the inside.

Subsequently, the fourth valve 21 is opened, the compressed air device 22 is operated, and the compressed air is supplied to the compressed air pipe 23, compressed air path 20, part of the main body side vacuum path 61, and to the base side vacuum path 62.
Vacuum intake port 63 communication path 100 liquid supply port 73
Mouth side liquid supply path 72 Part of main body side liquid supply path 71 Salvage path 15 Salvage pipe 1
7, and the brake fluid L adhering to the inner surface of the mouthpiece-side vacuum path 62 and the like can be removed by the force of compressed air.

Removal of residual liquid by air blowing can be done in a short time, and at this time, the filler opening 1
9 is closed by the sliding tube 18, air is not injected into the container 2, and moisture in the air does not mix with the brake fluid L in the container 2 and cause a drop in boiling point. .

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

(Effects of the Invention) As explained above, according to the vacuum liquid supply device of the present invention, compressed air is sent into the vacuum path and the liquid supply path, and the air blowing is possible. can be removed in a short time using the forced force of compressed air, preventing deterioration of vacuuming performance due to this adhered liquid, and the work cycle is also shorter than when removing adhered liquid by vacuuming. The effect is that the work efficiency can be improved.

Furthermore, since the injected air does not enter the container during the air blowing, it is possible to apply the present invention to liquids such as brake fluid, which are disadvantageous when they come into contact with air, without any inconvenience.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a vacuum liquid supply device according to an embodiment of the present invention, FIG. 2 is a diagram showing the vacuum liquid supply device according to the embodiment, FIG. 3 is a diagram showing the liquid supply by the embodiment device, and FIG. The figure shows the salvage operation using the embodiment device, and FIG. 5 shows the air blow operation using the embodiment device. 2... Container, 3... Opening, 4... Fitting part, 6
...Vacuum path, 7...Liquid supply path, 9...First valve, 10...Vacuum suction device, 12...Second valve, 13...Liquid storage tank, 15...Salvage path,
16... Third valve, 18... Sliding tube (opening/closing means), 19... Filler opening, 20... Compressed air path, 21... Fourth valve, 63... Vacuum intake port,
73...Liquid supply port, 100...Communication path, 201...
Supply port.

Claims (1)

[Scope of Claims] 1. A fitting part that can fit into the opening of the container is formed in the filler main body, and the fitting part has a filler opening that opens toward the inside of the container in a fitted state with the opening. a liquid supply port at one end of the liquid supply path is opened to the communication path communicating with the filler opening, and the other end of the liquid supply path is connected to a liquid storage tank; A vacuum outlet at one end of the vacuum path is opened, and the other end of the vacuum path is connected to a vacuum suction device, and a salvage path communicating with the atmosphere is branched from the liquid supply path, and the vacuum path is connected to the vacuum path. A first valve that opens when vacuuming is provided; a second valve that opens when liquid is supplied is provided in the liquid supply path; a third valve that opens during salvage is provided in the salvage path; A supply port at one end of the compressed air path is opened near the first valve of the vacuum path and at a position on the vacuum suction port side, and the other end of the compressed air path is connected to a compressed air supply device, and the compressed air path A vacuum liquid supply device characterized in that a fourth valve is provided which opens when compressed air is sent, and the filler opening is provided with an opening/closing means for opening and closing the filler opening with respect to the container.