JPS6232605Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an airless coating device, and particularly to an airless spray gun.

It is well known that when spray painting with an airless spray gun, it is necessary to select and use an appropriate nozzle tip in order to obtain the required pattern width and film thickness, especially for paints that easily clog the nozzle tip, such as anti-rust paints. When spray painting,
It is customary to use a nozzle tip holder that has a mechanism that allows cleaning by inverting the nozzle tip and spraying paint from the opposite direction.

By the way, spray guns equipped with conventional nozzle tip holders do not have a special mechanism for fixing the nozzle tip, so when spraying work is performed manually or by a painting robot at high speed or repeatedly, inertia is generated. This has the drawback that the nozzle tip reversing mechanism becomes misaligned due to such factors, and the angle of the nozzle tip changes, resulting in a change in the aim of the spray pattern on the painted surface.

This idea was made in view of the above circumstances, and the purpose is to provide an airless spray gun that does not cause any misalignment of the nozzle tip even when operated repeatedly or at high speed. This is done by attaching a reversing mechanism to the nozzle tip, which is reversibly attached to the tip of the main body, and by restricting the rotation of the reversing mechanism with a fixing mechanism, the nozzle tip is fixed at the rotation limit position. At a point configured to be fixed in position.

Embodiments of this invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing a first embodiment of this invention configured to be attached to a painting robot, and FIG. 2 is a side view thereof, showing that a nozzle tip holder 2 is attached to the tip of the main body 1. At the same time, a nozzle tip 3 is accommodated within the nozzle tip holder 2 so as to reciprocate in a fixed direction within a movable range Z of 180 degrees. A reversing lever 4 is integrally attached to the nozzle tip 3 as a reversing mechanism. By aligning the lever 4 with the central axis of the main body 1 as shown in FIG. 2, the nozzle hole can be set at a regular angle.

On the side surface of the main body 1, as a fixing mechanism, there is a substantially L-shaped fixing lever that restricts the rotation of the reversing lever 4, that is, the nozzle tip 3, by bringing one end into contact with the end of the reversing lever 4. 5 is rotatably attached. The fixing lever 5
An adjustment screw 6 and a lock nut 7 are screwed into one end, and by loosening or tightening the adjustment screw 6, the substantial tip position of the fixing lever 5 can be adjusted, and the above-mentioned reversing The lever 4 is pressed and fixed at a predetermined fixed position. Note that the lock nut 7 serves to prevent the adjustment screw 6 from loosening. Further, a cylindrical body 8 is attached to the intermediate part of the fixing lever 5, facing the main body 1, and as shown in FIGS. 1 and 3, a compression spring is provided inside the cylindrical body 8. 9 and a steel ball 10 pushed out toward the main body 1 by the compression spring 9 is housed.

Furthermore, a fixed seat 11 on which the steel ball 10 slides is fixed to the side surface of the main body 1, and the fixed seat 11
Two counterbore holes 12 are formed in which the steel balls 10 are fitted to restrict the rotation of the fixing lever 5. By fitting the steel ball 10 into one of the counterbore holes 12, , the fixing lever 5 is locked in the engagement position (the position shown by the solid line in FIG. 2) X where its tip abuts against the reversing lever 4, and the steel ball 10 is fitted into the other counterbore hole 12. By pushing in, the fixing lever 5 is locked in a non-engaging position Y (position shown by a chain line in FIG. 2) where the tip thereof does not come into contact with the reversing lever 4.

Therefore, in the above airless spray gun, when locking the nozzle tip 3 in the normal position, rotate the reversing lever 4 to the position shown in Figs. 1 and 2 to orient the nozzle tip 3 in the normal direction. , After that, with the adjusting screw 6 retracted, the fixing lever 5 is moved to the non-engaging position Y shown in FIG.
Rotate from the position to the engagement position X. In this case, the fixing lever 5 is such that the steel ball 10 fits into one counterbore hole 12 provided in the fixing seat 11, and the steel ball 10
is pressed by the compression spring 9, so it is locked in the engaged position. Therefore, if the adjusting screw 6 is rotated and moved forward, the reversing lever 4 is held down by the adjusting screw 6. and fixed at the rotation limit position. Incidentally, the adjustment screw 6 is fixed by tightening the lock nut 7 so that it does not loosen during painting work.

However, even if the airless spray gun is operated at high speed or repeatedly in the state set as described above, the nozzle tip 3 is fixed to the main body 1 via the reversing lever 4 and the fixing lever 5. There will be no deviation in angle,
Therefore, there will be no deviation in the spray pattern or film thickness.

In the above airless spray gun, in order to reverse the nozzle tip 3, loosen the lock nut 7 and move back the adjustment screw 6 to release the pressure on the reversing lever 4, and then move the fixing lever 5 as shown in FIG. All you have to do is turn it to the non-engaged position Y, and in this state, move the reversing lever 4 180 degrees from the previous position.
The nozzle tip 3 can be reversed by rotating it to different positions. Therefore, in the above airless spray gun, nozzle clogging can be eliminated in the same way as in the conventional airless spray gun.

Next, a second embodiment of this invention will be described with reference to FIGS. 4 to 6. Note that the second embodiment described below is configured to be attached to a painting robot in the same way as the first embodiment described above, so it is similar to the first embodiment described above.
The same members as in the embodiment are given the same reference numerals in FIGS. 4 to 6 as in FIGS. 1 to 3, and their explanations will be omitted.

FIG. 4 is a plan view showing a second embodiment of this invention, and FIG. It is fixed toward the side, and a rotating shaft 14 is horizontally attached to the fixed seat 13.
A fixing lever 15 is fixedly integrated with 4 in the radial direction. At the tip of the fixing lever 15, a slit 16 into which the reversing lever 4 is fitted is formed facing in the rotational direction of the rotating shaft 14 (vertical direction in FIG. 5).
By fitting the side end of the reversing lever 4 into the slit 16, rotation of the reversing lever 4, that is, rotation of the nozzle tip 3 is prevented.

Further, as shown in FIG. 6, counterbore holes 17 are formed on the outer peripheral surface of the rotating shaft 14 at positions rotated approximately 90 degrees and approximately 180 degrees in the circumferential direction from the fixing lever 15. On the other hand, the fixed seat 13 has a steel ball 18 corresponding to the counterbore hole 17.
The cylindrical body 19 containing the cylindrical body 19 is attached, and
A compression spring 20 that presses the steel ball 18 toward the rotating shaft 14 is housed within the cylindrical body 19 . In addition, the code 21a in FIGS. 4 to 6 indicates the cylindrical body 1.
This is a nut for fixing 9 to the fixed seat 13.

In the above-mentioned airless spray gun, the fixing lever 15 is raised to the disengaged position shown by the symbol Y in FIG. rotate it,
After that, when the fixing lever 15 is tilted to the engagement position indicated by the symbol X in FIG. The fixing lever 15 prevents the nozzle tip 3 from rotating. In this state, the steel ball 18 fits into one of the counterbore holes 17 formed on the outer peripheral surface of the rotating shaft 14, so the rotation of the fixing lever 15 is restricted, and therefore the reversing lever 4, ie The nozzle tip 3 is held in the locked state shown in the figure. Therefore, when painting is performed with the nozzle tip 3 set as described above, the nozzle tip 3 does not rotate, so there will be no deviation in the spray pattern or film thickness.

Furthermore, in the airless spray gun shown as the second embodiment, the reversing lever 4, that is, the nozzle tip 3, can be reversed by raising the fixing lever 15 to the non-engaging position Y. This makes it possible to eliminate nozzle clogging.

FIG. 7 shows an example in which this invention is applied to a handy type airless spray gun. That is, the airless spray gun shown in FIG. 7 has a reversing lever 24 fixed and integrated with a nozzle tip 23 in a nozzle tip holder 22 attached to a main body 21, and a fixing lever 25 and a fixing seat 31 on the side of the main body 21. , and move the reversing lever 24 to the 7th position.
Rotate the fixing lever 25 to the position shown in the figure, and rotate the fixing lever 25 to the engagement position The fixing lever 25 is locked by fitting it into the hole 32, and in this state, the reversing lever 24 is pressed by an adjustment screw (not shown in FIG. 7) provided at the tip of the fixing lever 25.・
Configured to be fixed.

Therefore, in this airless spray gun, the nozzle tip 23 is fixed at the normal position with respect to the main body 21 via the reversing lever 24 and the fixing lever 25, and the nozzle tip 23 is fixed in the normal position with respect to the main body 21 during painting work, as in the above-mentioned airless spray gun. By rotating the fixing lever 25 to the non-engaging position Y, the reversing lever 24, that is, the nozzle tip 23, can be rotated 180 degrees from the previous position, and the nozzle tip 23 can be prevented from shifting. can clear the blockage.

As is clear from the above description, according to the airless spray gun of this invention, a reversing mechanism is attached to the nozzle tip that is reversibly attached to the tip of the main body, and the rotation of the reversing mechanism is regulated by a fixing mechanism. The structure is such that the nozzle tip is fixed at the rotation limit position, which in turn fixes the nozzle tip at its normal position, so the angle of the nozzle tip will not shift even if the painting operation is performed at high speed or repeatedly. It is possible to prevent irregularities in pattern and film thickness, and in turn, it is possible to perform painting with precision.
In addition, since the angle of the nozzle tip is accurate and does not go out of order, when spraying work is done manually, the target position of the spray pattern can be standardized based on the direction of the spray gun, so manual adjustment of the nozzle reversing mechanism, etc. It is possible to obtain secondary effects such as being able to eliminate the burden of work.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the first embodiment of this invention;
Fig. 2 is a side view thereof, Fig. 3 is an enlarged sectional view of the part shown in Fig. 1, Fig. 4 is a plan view showing a second embodiment of this invention, Fig. 5 is a side view thereof, and Fig. 6 is an enlarged sectional view of the part shown in Fig. 1. FIG. 4 is an enlarged plan view of the portion shown in FIG. 4, and FIG. 7 is a side view showing still another embodiment of this invention. 1, 21... Main body, 3, 23... Nozzle tip, 4, 24... Reversing lever, 5, 15, 25
... Fixing lever, 11, 13, 31... Fixing seat, 12, 17, 32... Counterbore hole.

Claims (1)

[Scope of utility model registration request] In an airless spray gun, a nozzle tip is attached to the tip of the main body so as to be able to reciprocate in a fixed direction, and the nozzle tip is reversed to spray paint from the opposite direction. An airless spray gun comprising: a mechanism; and a fixing mechanism attached to the main body and fixing the nozzle tip at a rotation limit position via the reversing mechanism.