JP4204276B2 - Air blow device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air blowing device for removing foreign matter from a workpiece having a complicated shape such as an AT mission case of an automobile.
[0002]
[Prior art]
Conventionally, as a technique for cleaning a vehicle part having a complicated shape or removing foreign matter adhering to the part, for example, as disclosed in JP 2000-157939A, a cleaning liquid or compressed air is used as a pulse pressure to enhance a cleaning effect and the like. Such techniques are known.
[0003]
[Problems to be solved by the invention]
However, most of the conventional pulse pressure generation methods including the above-described technique are, for example, as shown in FIG. 7A, a method of repeatedly switching the flow path using the solenoid valve 51 or the like. As shown in FIG. 7 (b), the pulse pressure blown out from the spraying part 52 by a simple method is repeated only when the fluid pressure becomes zero and when the fluid pressure returns to the primary pressure. There was a problem of being weak.
Further, in the switching method using the solenoid valve 51, there is a problem that a signal circuit is required and the apparatus tends to be large, and the durability of the solenoid valve is poor, so that the service life of the apparatus is low.
[0004]
Therefore, an object of the present invention is to enhance the removal effect when removing foreign matter by air blow, and to make it possible to simply configure a device having good durability.
[0005]
[Means for Solving the Problems]
To achieve the above object, the present invention provides an air blowing device for removing foreign matter adhering to a workpiece, a pressurized air source for supplying pressurized air as a primary pressure, and an air sent from the pressurized air source. And a pressure increasing valve for generating pulsating secondary pressure air by pulsating the pressure and a blowing part for blowing the generated secondary pressure air.
[0006]
Here, the pulsating secondary pressure air is air that pulsates between the primary pressure and the secondary pressure with the minimum pressure being the primary pressure and the maximum pressure being higher than that, Such pulsating secondary pressure air does not drop from the primary pressure at all points in time, and can enhance the spraying effect and improve the foreign substance removal action. Such pulsating secondary pressure air can be easily increased by a general pressure increasing valve.
[0007]
Further, in the present invention, an air volume amplification type air nozzle that increases the secondary pressure air to generate the pulsating tertiary pressure air is provided in the blowing portion.
Here, as the air volume amplification type air nozzle, for example, an air nozzle such as a transvector can be applied. By further increasing the pressure from the secondary pressure, the action of removing foreign matters can be further enhanced.
[0008]
Moreover, in this invention, the said spraying part was made swingable by the swing mechanism.
If the spraying portion is swung by the swing mechanism in this way, for example, air can be sprayed over a wide range without leaking, and the foreign matter removing action can be further enhanced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is a schematic diagram showing the basic configuration of an air blowing device according to the present invention, FIG. 2 is an explanatory diagram of the structure of a pressure increasing valve, FIG. 3 is an explanatory diagram of the structure of an air volume amplification type air nozzle, and FIG. FIG. 5 is an explanatory diagram showing an example of a specific device configuration, and FIG. 6 is an explanatory diagram of an example of a swing mechanism.
[0010]
The air blow device according to the present invention enhances the effect of removing foreign substances and at the same time allows the device to be configured simply, and is characterized by blowing pulsatingly increased air using a pressure increasing valve.
[0011]
That is, as shown in FIG. 1, the basic configuration of the air blowing device 1 is a pulsation of a pressurized air source 2 for supplying pressurized air as primary pressure air and the pressurized air sent from the pressurized air source 2. The pressure increasing valve 3 that increases the pressure to generate pulsating secondary pressure air and the blowing unit 4 that blows the generated pulsating secondary pressure air toward the workpiece are provided.
[0012]
As shown in FIG. 2, the pressure increasing valve 3 has a large cross-sectional area with the left internal space as a large space and a small cross-sectional area with the right internal space as a small space with the center of the case 5 as a boundary. In addition, each internal space is divided into two chambers A, B, C, and D by the respective pistons 6 and 7, and both the pistons 6 and 7 are integrally coupled by the connecting rod 8.
An input circuit x for directly feeding primary pressure air is connected to the chambers C and D in the small space on the right side, and a switching valve 9 is connected to the chambers A and B in the large space on the left side. An input circuit y capable of sending primary pressure air is connected. Further, an output circuit z for sending out secondary pressure air is connected from the chambers C and D in the small space on the right side.
[0013]
In such a pressure increasing valve 3, when primary pressure air enters the C, D and B chambers, the pistons 6 and 7 are moved to the left by the air pressure in the B chamber, and the air in the C chamber is increased. Secondary pressure air is output from the output circuit z.
Next, when the switching valve 9 is operated and primary pressure air is introduced into the A, C, and D chambers, the pistons 6 and 7 are moved to the right by the air pressure in the A chamber. For this reason, the air in the D chamber is increased in pressure to become secondary pressure air, which is output from the output circuit z.
[0014]
By repeating as described above, the air pressure is obtained as shown in FIG. 4A, and pulsating secondary pressure air pulsating between the primary pressure and the secondary pressure is obtained. The pressure of the output circuit z at the end is the same value as the primary pressure.
[0015]
And by blowing such pulsating secondary pressure air from the blowing part 4, a foreign material can be removed with the effect higher than the solenoid specification pulsation pressure.
[0016]
By the way, although the spraying part 4 may be composed of a simple nozzle, it is possible to further increase the pressure by using an air volume amplification type air nozzle.
Here, FIG. 3 is a structural example diagram of the air volume amplification type air nozzle 11. The air nozzle 11 has a plurality of sub passages s for allowing the outside air to flow in the middle of the main passage p through which the pulsating secondary pressure air flows. As a result of the air inflow effect from the sub-passage s, an effect of increasing pressure by about 10% of the air source pressure from the main passage p can be expected.
[0017]
The air pressure at this time is as shown in FIG. 4B, and the air blowing pressure is increased, and the foreign matter removing action can be further enhanced.
[0018]
By the way, since the spraying part 4 as described above is more effective for removing foreign matter when spraying while shaking the nozzle, it is preferable to provide a swinging mechanism in the spraying part 4. Hereinafter, a specific example of the configuration of the air blowing device of FIGS. 5 and 6 will be described as an example.
[0019]
This air blow device 1A is a device for removing foreign matter adhering to a transmission case of an automobile, and is positioned by covering the recess 13d on the upper portion of the recess 13d formed on the table 13 so as to cover the recess 13d, Air blow is applied to the inner surface of the mission case W. At this time, an oil path surface blow nozzle 14 for blowing the oil path surface is disposed in the recess 13d of the table 13, and on the side surface of the mission case W, A hydraulic extraction hole blow member 15 that blows air from the side opening of the mission case W and blows the hydraulic extraction part is connected. While blowing pressurized air to feed foreign matter into the accumulating part, the oil road surface blow nozzle 14 is It is to freely swing by 16.
[0020]
As shown in FIG. 6, the swing mechanism 16 includes an arm 18 that can swing by the operation of the rotary actuator 17, and an oil road surface blow nozzle 14 that is an air volume amplification type air nozzle is provided at the tip of the arm 18. Is attached.
The rotary actuator 17 and the oil road surface blow nozzle 14 can be moved forward and backward by the operation of the cylinder 19, and the oil road surface blow nozzle 14 can be blown forward and backward while swinging the neck without leaking. Has been.
[0021]
By the way, the results of the foreign matter removal test performed on various workpieces using the air blow devices 1 and 1A as described above will be described.
First, in the case of the mission case, air was blown from the hydraulic circuit surface and the hydraulic extraction hole, but when the primary pressure air of 0.5 Mpa was blown for 1 second, the size of the foreign matter was about 0.4 mm and 5 seconds. Even when blown, the size of the foreign matter was about 0.18 mm. On the other hand, when the pulsating secondary pressure air of 0.5 Mpa was blown for 5 seconds, the size of the foreign matter was 0.02 mm or less, which was an order of magnitude smaller.
[0022]
In the case of the transmission shaft, air was blown in the hydraulic passage, but when the primary pressure air of 0.5 Mpa was blown for 1 second, the size of the foreign matter was about 0.4 mm, and even when blown for 5 seconds. The size of the foreign material was about 0.15 mm. On the other hand, when 0.5 Mpa of pulsating secondary pressure air was blown for 5 seconds, the size of the foreign matter was 0.02 mm or less, which was also an order of magnitude smaller.
[0023]
Next, in the case of the cover, air was blown in the hydraulic passage, but when the primary pressure air of 0.5 Mpa was blown for 1 second, the size of the foreign matter was about 0.15 mm, and even when blown for 5 seconds. The size of the foreign material was about 0.07 mm. On the other hand, when the pulsating secondary pressure air of 0.5 Mpa was blown for 5 seconds, the size of the foreign matter became 0.02 mm or less.
From this, the effectiveness of the present invention was confirmed.
[0024]
The present invention is not limited to the above embodiment. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, the type of workpiece is an example.
[0025]
【The invention's effect】
As described above, the air blowing device according to the present invention includes a pressurized air source that supplies pressurized air as a primary pressure, and pulsating secondary pressure air by pulsating the air sent from the pressurized air source. Since the pressure-increasing valve to be generated and the blowing part for blowing the generated secondary pressure air are provided, it is possible to spray with pressure air higher than the primary pressure at all points in time, and the foreign matter removing action can be improved. .
At this time, if an air volume amplification type air nozzle that generates pulsating tertiary pressure air is provided in the spraying portion, the foreign matter removing action can be further enhanced, and the spraying portion can be swung freely by the swing mechanism. If this is done, the action of removing foreign substances can be further enhanced.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the basic configuration of an air blowing device according to the present invention. FIG. 2 is an explanatory diagram of the structure of a pressure increasing valve. FIG. 3 is an explanatory diagram of the structure of an air volume amplification type air nozzle. Explanatory view of secondary pressure air, (b) is an explanatory view of pulsating tertiary pressure air. FIG. 5 is an explanatory view showing an example of a specific device configuration. FIG. 6 is an explanatory view of an example of a swing mechanism. (A) is an explanatory diagram of a conventional solenoid pressure intensifier, (b) is an explanatory diagram of pulsating air
DESCRIPTION OF SYMBOLS 1, 1A ... Air blow apparatus, 2 ... Pressurized air source, 3 ... Booster valve, 4 ... Spray part, 11 ... Air volume amplification type | mold air nozzle, 16 ... Swing mechanism.

Claims (3)

An air blowing device for removing foreign matter adhering to a workpiece, which includes a pressurized air source that supplies pressurized air as a primary pressure, and pulsating the air sent from the pressurized air source by pulsating pressure. A pressure increasing valve for generating secondary pressure air and a spraying section for blowing the generated secondary pressure air, and the pressure increasing valve has a large space with a large cross-sectional area and a small space with a small cross-sectional area in the case. The space and the small space are each divided into two chambers by pistons that are connected to each other, and an input circuit that feeds primary pressure air is connected to the two chambers that define the large space via a switching valve, and the small space is An input circuit for sending primary pressure air is connected to the two compartments, and an output circuit for sending secondary pressure air is derived from each chamber, and the piston that divides the large space is moved by operating the switching valve. Make The piston that partitions the small space is moved, and the movement of the piston that partitions the small space increases the air in one of the two chambers that partition the small space to generate the secondary pressure air as the output. An air blowing device that outputs from a circuit. The air blowing device according to claim 1, wherein the blowing unit includes an air volume amplification type air nozzle that increases secondary pressure air to generate pulsating tertiary pressure air. The air blowing device according to claim 1, wherein the spray unit is swingable by a swing mechanism.

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