JPH0580643U - Rotary air blower - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rotary air blow device capable of reliably cleaning foreign matters adhering to the inside of a work such as small parts used for fuel injection valves without moving the work. . [Structure] The rotor 19 is rotated by air supplied from the outside of the casing 11, and the blow pipes 20A and 20B attached to the shaft 15 are swung via a shaft 15 integrated with the rotor 19. Exhaust air after rotating the rotor 19 is ejected from the tip of the blow pipe 20A through the communication passage 26 and the air passage 17A provided in the shaft 15. Further, air from the outside is supplied to the blow pipe 20B from the air supply passage 29, and is blown out from the tip of the blow pipe 20B. Blow pipe 20
A and 20B perform air blow while swirling inside the work 1 to remove the foreign matter 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary air blow device used for cleaning the inside of various works such as small parts used for fuel pumps, fuel injection valves and the like.

[0002]

[Prior Art]

 Generally, various works such as small parts used for fuel pumps and injection devices are cleaned after cutting to remove foreign matters such as chips and dust. Among the cleaning operations, as a method for cleaning the inside of the work, an air blow method is used in which air is ejected by using the pressure of compressed air and foreign matter is blown off by the generated air flow.

In FIG. 7, reference numeral 1 denotes a small work as an injector housing constituting a fuel injection valve. The work 1 has a bottomed cylinder portion 2 and a cylinder coaxially projecting inside the cylinder portion 2. The cylindrical protrusion 3 and the through hole 4 formed in the cylindrical protrusion 3 in the axial direction. The work 1 has a coil accommodated in the cylindrical portion 2, and the coil constitutes an electromagnetic actuator of the fuel injection valve.

The work 1 is formed by cutting a metal rod into the shape shown in FIG. 7, and foreign matter 5 such as chips adheres to the bottom and the inner peripheral surface of the work.

For this reason, the cylindrical portion 2 of the work 1 after cutting is gripped by the hand 6 of the operator, and the foreign matter 5 is cleaned by an air blower.

In this air blow, a blow pipe 7 is attached to the tip of a tube connected to a pressure source such as an air tank that stores compressed air, and the air is ejected from the tip of the blow pipe 7 for cleaning. There is.

[0007]

[Problems to be solved by the device]

 When the inside of the work 1 is cleaned by such an air blow, as shown in FIG. 7, the cylindrical protrusion 3 exists at the axial center of the cylindrical portion 2, and the through hole 4 is formed in the cylindrical protrusion 3. However, even if the blow pipe 7 is positioned at the center shown by the solid line in FIG. 7 and air is blown, most of the air will escape from the through hole 4 as it is. In addition, since air that has not escaped from the through hole 4 does not reach the inner corners of the work 1 due to the obstacle of the cylindrical protrusion 3, it is said that there is no effect of removing the foreign matter 5 even if the work is performed as it is. There's a problem. Therefore, the blow pipe 7 is moved to the position shown by the alternate long and short dash line in FIG. 7 and then inserted into the work 1, and the work 1 is moved by the hand 6 so as to draw a circle to perform air blowing.

However, in this method, when a large number of small works 1 are processed in a large amount, accurately rotating all the works 1 with a small circle is very troublesome, and in addition, There is a problem in that it is difficult to perform the rotation of the above with an accurate circular motion, and the cleaning of the foreign matter 5 inside is often insufficient due to the incorrect circular motion.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a rotary air blow device which is capable of easily cleaning a work having a protrusion inside and is inexpensive and compact. The purpose is to do.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the first invention is that a cylindrical casing, a shaft rotatably provided in the casing and having an air passage formed therein, and a shaft disposed inside the casing. A rotor provided on the shaft for rotating the shaft by air supplied from the outside of the casing, and a blower projecting from the shaft to the outside of the casing to be bent in a crank shape and swiveling with a predetermined turning radius when the shaft rotates. A structure comprising a pipe and a communication passage for causing exhaust air discharged from the casing to flow into the blow pipe through the air passage of the shaft so as to eject air from the tip end side of the blow pipe There is.

A second invention is a tubular casing, a shaft rotatably provided in the casing and having an air passage formed therein, and a shaft provided in the casing and provided in the shaft. A rotor for rotating the shaft by air supplied from the outside of the casing; a blow pipe projecting from the shaft to the outside of the casing to be bent in a crank shape and turning with a predetermined turning radius when the shaft rotates; In order to eject air from the tip end side of the blow pipe, a structure is adopted which comprises an air supply passage for allowing external air supplied from outside the casing to flow into the blow pipe through the air passage of the shaft. There is.

[0012]

[Action]

 According to the first aspect of the present invention having the above structure, the air supplied from the outside of the casing is blown onto the rotor supported by the shaft in the casing, and is discharged to the outside after rotating the rotor and the shaft. The exhaust air is discharged from the communication passage through the air passage in the shaft and into the blow pipe that is swirling due to the rotation of the shaft. The inside of the ark can be cleaned.

Further, according to the second invention, the compressed air supplied from the outside of the casing is blown to the rotor axially supported in the casing by the shaft to rotate the rotor and the shaft, On the other hand, external air supplied from the outside of the casing flows from the air supply passage through the air passage in the shaft into the blow pipe that is swirling due to the rotation of the shaft, and blows out as an air stream from the tip of the blow pipe. The inside of the work can be cleaned.

[0014]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

1 to 3 show a first embodiment of the present invention.

In the figure, 11 is a cylindrical casing, and a rotor housing space 12 for housing a rotor 19 described later is formed on the upper side of the casing 11. Further, a shaft insertion hole 13 is bored in the axial center position in the axial direction through the rotor housing space 12. Furthermore, annular grooves 14A and 14B are formed in a concave shape around the shaft insertion hole 13 located below the rotor housing 12 and changing in position in the height direction. ing.

Reference numeral 15 denotes a shaft that is inserted into the shaft insertion hole 13 of the casing 11, and the shaft 15 is rotatably supported by the casing 11 through bearings 16 and 16 at both ends with the rotor housing space 12 interposed therebetween. Has been done. Two air passages 17A and 17B are bored in the shaft 15 in the axial direction, and the tip ends of the air passages 17A and 17B are opened to the outside of the casing 11 so that blow pipes 20A and 20B to be described later are provided. Openings 18A and 18B, which serve as mounting portions and open to the annular grooves 14A and 14B, are bored in the radial direction on the base end side.

Reference numeral 19 denotes a rotor disposed in the rotor accommodating space 12, the rotor 19 being a cylindrical hub 19A fixedly attached to the shaft 15 and having a predetermined space around the hub 19A. It is composed of four rectangular blades 19B, 19B, ... Radially provided.

Next, 20A and 20B are blow pipes bent in a crank shape, and the blow pipes 20A and 20B are integrated by bundling two of them, and the base end side thereof is an air passage provided on the shaft 15. It is fixed to the opening side of 17A, 17B, the middle part is bent so as to be eccentric by a predetermined amount, and the tip end side is extended in parallel with the axis for insertion into the work 1.

On the other hand, reference numeral 21 is an air ejection port formed at a position corresponding to the rotor accommodating space 12 of the casing 11, and the air ejection port 21 is slanted so as to eject air toward the blades 19 B of the rotor 19. Formed in the direction. The air outlet 21 is connected to an air supply pipe 22 for supplying air from the outside.

Next, 23 is one communication hole formed in the casing 11 in the radial direction at a position corresponding to the rotor housing space 12, and 24 is a hole formed in the casing in the radial direction at a position corresponding to the annular groove 14A. The other communication holes are shown, and the communication holes 23 and 24 are communicated with each other outside the casing 11 via a communication pipe 25. The one communication hole 24, the communication pipe 25 and the other communication hole 24 form a communication passage 26.

Reference numeral 27 denotes an air supply hole formed in the radial direction at a position corresponding to the annular groove 14 B of the casing 11. The air supply hole 27 has a branch air supply branching from the air supply pipe 22. Air is supplied from the outside through the pipe 28. The air supply hole 27 and the branch air supply pipe 28 form an air supply path 29.

Although the present embodiment is configured in this way, if the air supply pipe 22 is connected to an external pressure source such as a pressure tank, the air from the pressure source passes through the air supply pipe 22 and blows out air. The blades 19B, 19B, ... Of the rotor 19 are blown from the mouth 21, and the rotor 19 and the shaft 15 are rotated by the dynamic pressure of the air, and the tips of the blow pipes 20A, 20B attached to the shaft 15 are swung. The exhaust air blown to the blades 19B, 19B, ... Of the rotor 19 flows into the annular groove 14A through the communication hole 23, the communication pipe 25, and the communication hole 24, and one of the openings 18A provided in the shaft 15 It flows into the air passage 17A and is ejected from the tip of the blow pipe 20A.

Further, the external air from the branch air supply pipe 28 flows into the other annular groove 14B via the air supply hole 27, and is similarly ejected from the tip of the blow pipe 20B via the opening 18B and the air passage 17B. To do. Since the pressure of the air ejected via the branch air supply pipe 28 does not decrease for rotating the rotor 19, the pressure of the air is higher than that of the air passing through the communication passage 26, and a stronger air flow is generated. Is possible.

At the time of cleaning operation of this embodiment, the blow pipes 20A and 20B in the state shown by the one-dot chain line in FIG. 1 are advanced into the work 1 as shown by the two-dot chain line so that the air is removed. Spray inside the work 1. The blow pipes 20A and 20B have their tips eccentric from the axis of the shaft 15 in accordance with the internal space of the work 1 formed into an annular shape. Clean foreign matter 5.

At this time, the blow pipes 20A and 20B are cleaned by preparing several kinds of blow pipes having different lengths of the tips, eccentricity from the axis of the shaft 15, shapes of the ejected tips, and the like. The blow pipes 20A and 20B suitable for the shape and use of the work 1 can be replaced and used at any time.

As described in detail above, in the rotary air blower according to the present embodiment, even if the worker does not rotate the workpieces 1 having the cylindrical protrusions 3 therein one by one, the internal air blown by the air blower can be used. Cleaning can be done easily, workability is improved, and work accuracy is improved.

Further, since air is used for turning the blow pipes 20A and 20B, it is not necessary to separately provide an electric power source for turning such as an electric wiring and a motor, and the structure is simple. Therefore, an inexpensive and small device can be obtained.

Further, since the exhaust air required for turning is reused for air blowing, the pressure of the air is used without waste, which is excellent in economic efficiency.

On the other hand, since the air supply hole 27 and the branch air supply pipe 28 are provided and the high pressure air is ejected from the blow pipe 20B, the foreign matter 5 and the like strongly adhered to the work 1 are also removed by the powerful air flow. Is possible.

In addition, even when it is used for a work having no cylindrical protrusion inside, by blowing the air by rotating the tips of the blow pipes 20A, 20B, the blow pipe 7 fixed as in the prior art can be obtained. Since the airflow reaches a wider area than that, there is an effect that internal cleaning can be performed effectively.

If a flow rate control valve is attached to the air supply pipe 22 and the branch air supply pipe 28 of this embodiment, it is possible to adjust the rotation speed of the blow pipes 20A and 20B and the speed of the air flow due to the air blow. Become.

FIGS. 4, 5 and 6 show second, third and fourth embodiments of the present invention, in which the same components as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted. To do.

FIG. 4 shows a second embodiment of the present invention, which is different from the first embodiment in that the air passage, the blow pipe, etc. are provided as one system and the exhaust gas discharged from the rotor is used. This is because air was used for air blow.

That is, in FIG. 4, reference numeral 31 denotes a cylindrical casing, a rotor accommodating space 32 for accommodating the rotor 19 is formed on the upper side of the casing 31, and the rotor accommodating space is axially arranged at the axial center position. A shaft insertion hole 33 is formed through 32. A chamber 34, which is a cylindrical internal space, is provided below the rotor housing space 32.

Reference numeral 35 denotes a shaft that is inserted into the shaft insertion hole 33 of the casing 31. An air passage 36 is bored in the shaft 35 in the axial direction, and the tip end side of the air passage 36 is opened to the outside of the casing 31. It is integrated with a blow pipe 38, which will be described later, and the base end side is an opening 37 in the axial direction that opens to the chamber 34.

Reference numeral 38 is a blow pipe bent in a crank shape. The base end side of the blow pipe 38 is integrated with the shaft 35, the middle portion is bent so as to be eccentric by a predetermined amount, and the tip end side is inserted into the work 1. It extends in parallel with the axis.

Further, 39 is one communicating hole formed in the casing 31 in the radial direction at a position corresponding to the rotor accommodating space 32, and 40 is formed in the radial direction of the casing 31 at a position corresponding to the chamber 34. Other communication holes are shown, and the communication holes 39 and 40 are communicated with each other outside the casing 31 via a communication pipe 41. The one communication hole 39, the communication pipe 41 and the other communication hole 40 constitute a communication passage 42.

Although the present embodiment is configured in this way, exhaust air after rotating the rotor 19 is connected to the chamber 34 via the communication passage 42, and the work is transmitted from the air passage 36 of the shaft 35 and the blow pipe 38. 1 can be jetted.

Next, FIG. 5 shows a third embodiment of the present invention. This embodiment also has one system of air passages, blow pipes, etc., and uses exhaust air discharged from the rotor for air blow. ..

That is, in FIG. 5, reference numeral 51 denotes a cylindrical casing, a rotor housing space 52 for housing the rotor 19 is formed on the lower side of the casing 51, and the rotor housing space is axially arranged at the axial center position. A shaft insertion hole 53 is formed through 52. A chamber 54 is provided above the rotor housing space 52 via a partition wall 51B.

Reference numeral 55 denotes a shaft that is inserted into the shaft insertion hole 53 of the casing 51. An air passage 56 is bored in the shaft 55 in the axial direction, and the tip end side of the air passage 56 is opened to the outside of the casing 51. It is integrated with a blow pipe 58, which will be described later, and has a plurality of radial openings 57, 57, ... Opened to the chamber 54 on the base end side.

Reference numeral 58 is a blow pipe bent in a crank shape. The base end side of the blow pipe 58 is integrated with the shaft 55, the middle part is bent so as to be eccentric by a predetermined amount, and the tip end side is inserted into the work 1. It extends in parallel with the axis.

Further, reference numeral 59 is a communication passage formed in a partition wall 51 B that connects the rotor housing space 52 of the casing 51 and the chamber 54.

Although the present embodiment is configured as described above, exhaust air after rotating the rotor 19 is connected to the chamber 54 through the communication passage 59, and each opening 57 of the shaft 55 is connected to the air passage of the blow pipe 58. It is possible to supply the air to the work piece 56 and blow the air to the work piece 1 from the blow pipe 58.

In this embodiment, since the communication passage 59 is provided inside the casing 51, the communication passages 26 and 42, which are outside the casings 11 and 31 in the first and second embodiments, can be eliminated, and the outer surface of the casing 51 can be eliminated. Since it is simplified and easy to hold, it can be expected that workability will be improved. Further, since it is not necessary to attach the communication pipes 25 and 41 to the outside, the number of steps is reduced and the productivity is improved.

Further, FIG. 6 shows a fourth embodiment of the present invention. The feature of this embodiment is that the air passage, the blow pipe, etc. are one system, and the external air from the external pressure source is directly used for the air blow. There is something I did.

That is, in FIG. 6, reference numeral 61 denotes a tubular casing, a rotor housing space 62 for housing the rotor 19 is formed on the lower side of the casing 61, and the rotor housing space is axially arranged at the axial center position. A shaft insertion hole 63 is formed through 62 and a chamber 64 described later. A chamber 64 is provided above the rotor accommodation space 62 via a partition wall 61B.

Reference numeral 65 denotes a shaft that is inserted through the shaft insertion hole 63 of the casing 61. An air passage 66 is bored in the shaft 65 in the axial direction, and the tip end side of the air passage 66 is opened to the outside of the casing 61. , Which will be described later, are integrated with a blow pipe 68, and the base end side is formed with a plurality of radial openings 67, 67, ... Opened to the chamber 64.

Reference numeral 68 is a crank-shaped blow pipe, and the base end side of the blow pipe 68 is integrated with the shaft 65, the middle portion is bent so as to be eccentric by a predetermined amount, and the tip end side is inserted into the work 1. It extends in parallel with the axis.

Further, numeral 69 is an exhaust hole formed in the radial direction at a position corresponding to the rotor accommodating space 62 of the casing 61. The exhaust hole 69 spreads the air when exhausting the exhaust air, and reduces noise. An exhaust muffler 70 that reduces

Further, reference numeral 71 denotes an air supply hole formed in the radial direction at a position corresponding to the chamber 64 of the casing 61. The air supply hole 71 is provided with a branched air supply branching from the air supply pipe 22. Air is supplied from the outside through the pipe 72. The air supply hole 71 and the branch air supply pipe 72 form an air supply path 73.

Although the present embodiment is configured in this way, the exhaust air after rotating the rotor 19 is discharged to the outside from the exhaust holes 69 through the exhaust muffler 70. Further, the air from the branch air supply pipe 72 flows into the chamber 64 through the air supply hole 71, is supplied to the air passage 66 of the blow pipe 68 from each opening 67, and is blown from the blow pipe 68 to the work 1. be able to.

In the present embodiment, the exhaust air that rotates the rotor 19 is discharged as it is, and the air is blown with the external air. Therefore, with a simple structure having the air passage 66, the blow pipe 68, etc. as one system, it is possible to eject high-pressure air and remove the foreign matter 5 and the like strongly adhered to the work 1 by a strong air flow.

Note that the second embodiment shown in FIG. 4 may also be configured to blow air using the air supplied from the outside, as in the fourth embodiment shown in FIG.

[0056]

[Effect of the device]

 As described above in detail, in the rotary air blowing device according to the present invention, the air can be blown while rotating the bent blow pipe by the rotor, so that the air blow can be performed without moving the work having the protrusion inside. The efficiency can be improved, and moreover, by blowing the air by turning the end of the blow pipe, the airflow reaches a wider area than the conventional fixed blow pipe, so the foreign matter adhering to the workpiece can be reliably removed. Therefore, the internal cleaning can be effectively performed.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a rotary air blowing device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

3 is a plan view of the rotary air blow device shown in FIG. 1. FIG.

FIG. 4 is a vertical sectional view showing a rotary air blower according to a second embodiment of the present invention.

FIG. 5 is a vertical sectional view showing a rotary air blowing device according to a third embodiment of the present invention.

FIG. 6 is a vertical sectional view showing a rotary air blowing device according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory view showing a state of air blow to a work according to a conventional technique.

[Explanation of symbols]

 1 Work 11, 31, 51, 61 Casing 14A, 14B Annular groove 15, 35, 55, 65 Shaft 17A, 17B, 36, 56, 66 Air passage 19 Rotor 20A, 20B, 38, 58, 68 Blow pipe 26, 42 , 59 communication path 29, 73 air supply path 34, 54, 64 chamber

Claims (2)

[Scope of utility model registration request] 1. A cylindrical casing, a shaft rotatably provided in the casing and having an air passage formed therein, and a shaft located inside the casing and provided on the shaft, and supplied from outside the casing. A rotor that rotates the shaft with air, a blow pipe that protrudes from the shaft to the outside of the casing, bends in a crank shape, and turns with a predetermined turning radius when the shaft rotates; A rotary air blowing device, comprising: a communication passage that allows exhaust air discharged from the casing to flow into the blow pipe via an air passage of the shaft. 2. A tubular casing, a shaft rotatably provided in the casing and having an air passage formed therein, and a shaft provided inside the casing and provided on the shaft, and supplied from outside the casing. A rotor that rotates the shaft with air, a blow pipe that protrudes from the shaft to the outside of the casing, bends in a crank shape, and turns with a predetermined turning radius when the shaft rotates; A rotary air blowing device, comprising: an air supply passage for causing external air supplied from outside the casing to flow into the blow pipe through an air passage of the shaft so as to be jetted.