JPH0721255Y2 - Air spraying device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an air spraying device for removing foreign matter on a work surface to be coated and for removing liquid, water, paint, etc. on a work surface, and in particular, labor saving associated with its automation. Technology for uniformization and uniform and dense air blowing.
The present invention, for example, prevents the carry-over of the plating solution in the next step in the plating step, prevents the concentration of the solution from decreasing from the washing step to the next step of using the solution, drains water from the washing step to the drying step, and paints for dip coating. It can also be used for prevention of dripping, draining before drying after water-based degreasing cleaning, and the like.

[0002]

2. Description of the Related Art Generally, in order to prevent rust and improve appearance, parts of machines and devices are subjected to electrodeposition coating, electrostatic coating, or surface treatment such as plating or chemical conversion treatment. It However, if foreign matter such as dust or water droplets is present on the surface of the work during coating or surface treatment, a smooth coated surface may not be obtained, or the plating may be gradually peeled off. Therefore, the work of removing foreign matter from the surface of the work prior to painting or surface treatment is an essential process.

Compressed air (air) supplied from a compressor is generally used for the foreign matter removing operation. In the case of relatively small workpieces, a holding frame is used to hold a large number of workpieces, and an operator holding an air gun blows air to the surface of each workpiece in order to remove foreign matter. I do. In addition, foreign matter is also removed by blowing air from a plurality of fixed nozzles.

[0004]

The above-mentioned conventional foreign matter removing work has the following problems caused by manually blowing air. First, when performing a foreign matter removal operation on a large number of works, it takes a long time for the operator, and thus a great deal of artificial work is required. Also,
It is difficult to blow air uniformly on the work at a high density, and when the skill level of the operator is low, it is not possible to completely remove foreign matter from many works, causing the above-mentioned defects. Was there.

Therefore, an object of the present invention is to provide an air spraying device which solves the problems of the prior art and realizes automation and spraying of uniform and high density air.

[0006]

To achieve the above object, an air spraying device of the present invention comprises a frame, an air spraying head supported by the frame so as to be slidable in one direction, and
A drive mechanism for reciprocating the air blowing head in the above-mentioned direction, the air blowing head being a vertically arranged rotating disc, and an air blowing nozzle arranged at a position eccentric from the axis of the rotating disc. And a mechanism for rotating the rotating disk in association with the reciprocating movement of the air blowing head.

[0007]

According to the present invention, since the rotary disk of the air spray head reciprocates in one direction while rotating, a cycloid is provided within a predetermined range from a spray nozzle disposed at a position eccentric from the axis of the rotary disk. A uniform and high-density air is drawn and drawn.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of an air spraying device according to the present invention. In FIG. 1, reference numeral 1 is a square-column-shaped frame having a steel plate welded structure erected on a rectangular base 2. A pair of guide rods 3 are arranged in the longitudinal direction on the upper surface of the base 2, and a feed screw shaft 4 is rotatably interposed between the guide rods 3 in parallel with the guide rods 3 through a bearing 5. It is supported. The guide rods 3 are slidably fitted to sliders 6 formed in pairs on both side surfaces of the lower end of the frame 1, and the feed screw shaft 4 is a nut 7 integrated with the lower end of the frame 1. It is screwed to. Therefore, when the feed screw shaft 4 is rotated by holding the handle 8 attached to one end thereof, the frame 1 is guided by the guide rod 3 and moves forward and backward on the base 2 in the direction indicated by the arrow in the figure. A slit 9 is formed vertically in the center of the front surface of the frame 1, and the rotary disk 10 moves along the slit 9.

2 (a sectional view taken along the arrow A in FIG. 1) and FIG.
As shown in (a cross-sectional view taken along the arrow B in FIG. 1), a forward / reverse rotatable air motor 12 in which a speed reducer 11 is integrated is provided in the lower portion of the frame 1. A pulley 13 is attached to the rotary shaft of the air motor 12.
And a pulley 1 rotatably supported on the upper portion of the frame 1.
A belt 15 having a loop shape is wound around 4 and.

As shown in FIG. 4 (enlarged sectional view taken along the line CC in FIG. 3), the above-mentioned rotating disk 1 is provided on the front side of the belt 15.
An air blowing head 16 holding 0 is fixed via a bracket 17. The air blowing head 16 has a rotating shaft 1
8, the head main body 19, the pinion 20, and the rotary joint 21 are main constituent members.

The rotary shaft 18 is rotatably held by a head body 19 via a bearing 22 while the rotary disk 10 is fixed to the tip thereof. A pinion 20 is integrated with the rotary shaft 18 behind the head body 19, and a rotary joint 21 is connected to the rear end of the pinion 20. The rotary joint 21 is attached to the head body 19 via a stay 24, and air from a compressor (not shown) is supplied to the rear portion of the rotary joint 21 via an air hose 25. An air passage 26 communicating with the rotary joint 21 is formed at the axis of the rotary shaft 18, and an air passage 27 communicating with the air passage 26 is formed inside the rotary disk 10. The air passage 27 has a straight line shape, and both ends of the air passage 27 reach the vicinity of the outer circumference of the rotating disk 10 and communicate with six air blowing nozzles 28 attached to the front surface of the rotating disk 10.

As shown in FIGS. 2 and 3, a guide rail 23 and a rack 29 are vertically extended in the frame 1. A slider 30 integrally attached to the bracket 17 is fitted to the guide rail 23, and the air blowing head 16 is guided by the guide rail 23 and slides up and down. The rack 29 has the pinion 20 described above.
Mesh with each other, and the pinion 20, that is, the rotary shaft 18 rotates as the air blowing head 16 moves up and down.

Proximity switches 31 and 32 are provided on the rear surface of the rack 29 near the upper and lower ends of the slit 9, respectively. Further, an iron piece 33 is attached to the side surface of the rotary joint 21, and the air blowing head 1
When 6 moves up or down to reach a predetermined position, the iron piece 33 approaches the proximity switches 31 and 32. When the iron piece 33 approaches the proximity switches 31 and 32,
A signal is sent from the proximity switches 31 and 32 to an air supply device (not shown), and the air motor 12 is reversed.
The vertical position of the air blowing head may be detected by a photoelectric sensor or the like instead of the proximity switch.

On the other hand, as shown in FIG. 1, a carrier cable 34 is installed in the upper front part of the air blowing device. A holding frame 35 is hung on the transport cable 34 in a direction orthogonal to the air blowing device. On the surface of the holding frame 35 facing the air blowing device, a plurality of (12 in the illustrated example) works 37 (steel plate pressed products) are held via a suspending tool 36 integrated by welding. The transport cable 34 intermittently moves in the direction shown by the arrow, and the work 37 held by the holding frame 35 in front of the air blowing device.
Are arranged vertically for a certain period of time.

The operation of this embodiment will be described below.

In this embodiment, during the foreign matter removing operation, the handle 1 is first rotated to move the frame 1 forward and backward to adjust the distance between the rotary disk 10 and the work 37. After this adjustment is completed, the air motor 12 is started while the air is blown to the air blowing head 16.

Then, the air is rotary joint 21.
And the air passages 26 and 27, and the air blowing nozzle 28
A high-speed air stream is ejected from the tip of. On the other hand, when the air motor 12 rotates, the front surface of the belt 15 travels in one of the upper and lower directions (here, the upward direction), and along with this, the air blowing head 16 is also guided by the guide rail 23 and moves upward. Further, as the air blowing head 16 moves upward, the pinion 20 meshing with the rack 29 rotates counterclockwise, and the rotary shaft 18 integrated with the pinion 20 is rotated.
And the rotating disk 10 also rotates in the same direction. Therefore,
The air spray nozzle 28 attached to the rotating disk 10 moves upward while turning counterclockwise around the rotating shaft 18 to draw a cycloid, and evenly toward the workpiece 37 with a width substantially equal to the diameter of the rotating disk 10. Air is jetted.
At this time, the holding frame 35 is stopped. By drawing the cycloid in this way, the loci of the blast air overlap and the high-density spray is performed.

When the air blowing head 16 moves up to a predetermined position, the iron piece 33 approaches the upper proximity switch 31, a signal is sent from the proximity switch 31 to the air supply device, and the air motor 12 is reversed. Then, this time Belt 1
The front surface of 5 travels downward, the air blowing head 16 rises, and in the reverse procedure to the above, the air blowing nozzle 28 descends and turns clockwise around the rotary shaft 18.
Then, when the air blowing head 16 descends to a predetermined position, the iron piece 33 approaches the lower proximity switch 32,
The signal from the proximity switch 32 causes the air motor 12 to reverse and the air blowing head 16 to move up again.

In this way, the air blowing head 16 reciprocates up and down, the work 37 is evenly exposed to the air jetted from the tip of the air blowing nozzle 28, and the foreign matter adhering to the surface is completely removed. Will be removed. Then, when the foreign substances are removed from the works 37 in the vertical row held by the holding frame 35, the transport cable 34 moves by a predetermined amount. Then, the next vertical single-row work 37 comes to be positioned in front of the air blowing device, and the foreign matter is removed by the same procedure.

Although the description of the specific embodiment has been completed, the embodiment of the present invention is not limited to this embodiment. For example,
A feed screw mechanism, a linear motor, or the like may be used as a drive mechanism for reciprocating the air blowing head,
A mechanism using a guide rail and a friction roller may be used as the mechanism for rotating the rotary disk. In addition, the number of air blowing nozzles and the arrangement thereof may be appropriately changed or the moving direction of the air blowing head may be inclined for design reasons or the like. This makes it possible to remove foreign matter on the side surface of the work. Further, although the work 37 is held on one side of the holding frame 35 in the above-described embodiment, the work 37 may be held on both sides and foreign matter may be removed by a pair of air blowing devices.

[0022]

As is apparent from the above description, according to the air spraying device of the present invention, the air spraying head is reciprocated in one direction, and the air spraying nozzle is provided in association with the reciprocating motion. Further, since the rotating disk is rotated, it is possible to easily automate the work of removing foreign matter on the surface of the work, and to blow the air to the work uniformly at high density.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an air blowing device according to the present invention.

FIG. 2 is a sectional view taken along arrow A in FIG.

3 is a sectional view taken along the arrow B in FIG.

FIG. 4 is an enlarged cross-sectional view taken along the line CC in FIG.

[Explanation of symbols]

 1 frame 2 bed 3 guide rod 4 feed screw shaft 7 nut 8 handle 9 slit 10 rotating disk 12 air motor 15 belt 16 air blowing head 18 rotating shaft 19 head body 20 pinion 21 rotary joint 23 guide rail 25 air hose 26, 27 air passage 28 Air spray nozzle 29 Rack 30 Slider 31, 32 Proximity switch 33 Iron piece 34 Transport cable 35 Holding frame 37 Work piece

Claims (1)

[Scope of utility model registration request] 1. A frame comprising a frame, an air blowing head slidably supported by the frame in one direction, and a drive mechanism for reciprocating the air blowing head in the direction, and the air blowing head is vertical. A rotary disk disposed in the air disk, an air spray nozzle disposed at a position eccentric from the axis of the rotary disk, and a mechanism for rotating the rotary disk in association with the reciprocating movement of the air spray head. An air spraying device characterized in that