JPH017897Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The invention includes a first port connected to a negative pressure source,
Improvement of an air filter attached to the third port of a vacuum switching valve comprising a second port connected to a negative pressure actuator and a third port communicating with the atmosphere and configured as an air filter attachment port. Regarding.

(Prior Art) Conventionally, in order to prevent water from entering into an air filter, an air filter as disclosed in, for example, Japanese Utility Model Application Laid-open No. 55-153122 has been devised. In this conventional example, in order to prevent water adhering to the outer wall of the cover member of the air filter and flowing down along the outer wall from reaching the opening of the air intake port, a conical cylindrical opening wall and a lower end inner side of the opening wall are installed. Moreover, a cylindrical opening wall is disposed vertically on the outer periphery of the air intake port, so that the air intake port is disposed perpendicularly to the mounting port of the air filter.

(Problem to be solved by the invention) Therefore, in the conventional technology, the air intake port must be placed vertically below the mounting port of the air filter, which has the disadvantage of being restricted in the mounting direction of the air filter. It was hot.

Therefore, an object of the present invention is to provide an air intake port in a direction parallel to the mounting port in order to eliminate restrictions on the mounting direction of the air filter.

[Structure of the idea]

(Means for Solving the Problems) The technical means used in the present invention to solve the above problems consists of a first port connected to a negative pressure source and a second port connected to a negative pressure actuator. , and a third port communicating with the atmosphere; a cover member that is cylindrical in a parallel direction and that is fitted into the third port; a body member that is press-fitted and fixed to the cover member; and a body member that is formed between the cover member and the body member and that is an air chamber having an inner circumferential wall as part of its wall surface; a filter chamber formed between the cover member and the body member and communicating with the third port; a first air passage formed in the cover member and penetrating the third port in a direction parallel to the third port and communicating with the air intake; the first air passage and the air chamber; an air slit formed between the inner peripheral surface of the cover member constituting the body member and communicating between the first air passage and the air chamber; and an air slit formed in the body member and displaced in the circumferential direction with respect to the air slit. a second air passage formed in the body member and communicating between the air port and the filter chamber; and a second air passage disposed within the filter chamber and communicating with the second air passage The air filter includes a filter member disposed between the air filter and the port.

(Function) According to this technical means, the air intake port can be formed parallel to the third port which is the air filter mounting port. Therefore, the side circumferential direction on the air filter side can be completely waterproof. Water droplets that have entered parallel to the air intake port are discharged from the air intake port on the opposite side in the axial direction or in the same direction via the first air passage. Since the air intake port is formed along the outer periphery of the cylindrical end surface of the cover member, water droplets that have entered the first air passage are easily discharged. Even if water droplets enter the air chamber from the first air passage through the air slit, the air port connected to the filter chamber is displaced from the air slit in the circumferential direction, so the water droplets are unlikely to enter the air port.

(Example) An example of the present invention will be described below based on the drawings.

In FIG. 1, the vacuum switching valve 10 has a first port 11 connected to a negative pressure source.
and a second port 12 connected to a negative pressure actuator.
A third port 13 communicating with the atmosphere is provided, and when the electromagnetic coil 14 is in a non-excited state, a valve member 15 is provided.
is pressed to the left in the figure by a spring 16 to close the inner end of the first port, and the third port communicates with the second port.

Furthermore, when the electromagnetic coil 14 is energized, the valve member 15 moves to the right in the figure against the spring 16, closing the inner end of the third port 13, and the first port communicates with the second port. do.

The third vacuum switching valve 10
The air filter 20 according to the present invention is fitted into the port 13, and the third port 13 functions as an air filter mounting port.

The air filter 20 is composed of a cover member 21, a body member 22, and a filter member 23, and is fitted into the third port 13 of the vacuum switching valve 10 by an elastic tube 24.

At both ends of the outer peripheral wall 25 of the cover member 21, an air intake port 26 is formed along the entire circumference of the outer peripheral wall 25, and the air intake port 26 has a first air passage 27 that penetrates in a direction parallel to the mounting port 13. It is connected by This first air passage 27 is connected to the cover member 21
is formed by an outer circumferential wall 25 and an inner circumferential wall 28,
The outer circumferential wall 25 is connected to the inner circumferential wall 28 by a connecting portion 29 .

The body member 22 is press-fitted into the inner circumferential wall 28 and fixed by a projection 30 provided on the inner circumferential wall 28.
The body member 22 and the cover member 21 form an air chamber 31 and a filter chamber 32, and the filter chamber 32 includes a filter member 23, a protrusion 33 provided on the cover member 21, and a protrusion 34 provided on the body member 22. It is fixed to.

An air slit 35 is provided in the inner circumferential wall 28 of the cover member 21 to communicate the first air passage 27 and the air chamber 31.

A recess 36 is formed in the body member 22 to increase the volume of the air chamber 31, and an air port 37 is formed in the recess 36 in a direction perpendicular to the mounting port 13.

Here, the cross-sections of the cover member 21 and the body member 22 shown in FIG. 1 are respectively negative cross-sectional views in FIG. 2.

As is clear from this, the air ports 37 and the air slits 35 of the inner circumferential wall 28 are arranged alternately in the circumferential direction.

With the above configuration, water droplets that enter the air chamber 31 from the air intake port 26 through the air slit 35 flow downward along the recess 36 or the inner circumferential wall 28, and are located below the air intake port 26 where they first entered. The air is quickly discharged from the air intake port 26. At this time, since the air ports 37 and the air slits 35 are arranged alternately in the circumferential direction, water droplets do not directly enter the air ports 37, and water droplets can be prevented from entering the vacuum switching valve 10.

[Effect of idea]

As explained above, according to the present invention, the air filter has an outer peripheral wall and an inner peripheral wall, has a cylindrical shape parallel to the third port of the vacuum switching valve, and has a cylindrical shape parallel to the third port of the vacuum switching valve. A cover member 21 to be fitted, a body member 22 to be press-fitted and fixed to the cover member, an air chamber 31 formed between the cover member and the body member and having an inner circumferential wall of the cover member as part of its wall surface; a filter chamber 32 formed between the cover member and the body member and communicating with the third port; and an air intake port 2 formed along the outer periphery of the cylindrical end surface of the cover member.
6. A first air passage 27 formed in the cover member and penetrating the third port in a direction parallel to the air intake port, the cover member forming the first air passage and the air chamber; an air slit 35 formed between the inner circumferential surface and communicating between the first air passage and the air chamber; formed in the body member and disposed at a position displaced in the circumferential direction with respect to the air slit; an air port 37, a second air passage 38 formed in the body member and communicating between the air port and the filter chamber, and a second air passage 38 disposed within the filter chamber between the second air passage and the third port. Arranged filter member 2
It consists of 3.

Therefore, water droplets do not enter from the outer peripheral surface of the cover member. Even if water droplets enter the air intake port formed on the end face of the cover member, the water droplets are also discharged from the air intake port. Even if water droplets enter the air chamber from the air intake port through the air slit, they are unlikely to enter the air port. In this way, no matter which side of the air filter the water droplets try to enter, the water droplets are removed, so even if the air filter is installed parallel to the mounting port, the function of the air filter will not deteriorate due to the water droplets.

[Brief explanation of the drawing]

Figure 1 is a sectional view of an embodiment of the waterproof air filter according to the present invention when it is inserted into a vacuum switching valve. 3 is a right side view of the air filter, FIG. 3 is a left side view of the waterproof air filter according to the present invention, and FIG. 4 is a longitudinal sectional view of the body member of the waterproof air filter according to the present invention. 10... Vacuum switching valve, 11...
1st port, 12...2nd port, 13...3rd port (air filter mounting port), 20...air filter, 21...cover member, 22...body member, 2
3... Filter member, 25... Outer peripheral part, 26... Air intake port, 27... First air passage, 28... Inner peripheral wall, 31
...air chamber, 32...filter chamber, 35...air slit, 37...airport, 38...second air passage.

Claims (1)

[Claims for Utility Model Registration] A first port connected to a negative pressure source, a second port connected to a negative pressure actuator, and a third port connected to the atmosphere.
The air filter is attached to the third port of the vacuum switching valve, the air filter having an outer circumferential wall and an inner circumferential wall, and having a cylindrical shape in a direction parallel to the third port of the vacuum switching valve. a cover member fitted into the third port; a body member press-fitted and fixed to the cover member; formed between the cover member and the body member;
an air chamber having an inner circumferential wall of the cover member as a part of the wall surface; an air chamber formed between the cover member and the body member;
a filter chamber communicating with the third port; an air intake port formed along the outer periphery of the cylindrical end surface of the cover member; an air intake port formed in the cover member and penetrating in a direction parallel to the third port; a first air passage communicating with the air intake; a first air passage formed between the first air passage and an inner circumferential surface of a cover member constituting the air chamber; a first air passage communicating with the air chamber; a communicating air slit; an air port formed in the body member and disposed at a position circumferentially displaced with respect to the air slit; a second air port formed in the body member and communicating between the air port and the filter chamber; An air filter comprising: a passage; and a filter member disposed within the filter chamber and between the second air passage and a third port.