JPH0357829B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) FIELD OF THE INVENTION The present invention relates to fluid injection nozzles.

(Prior art) Fluid injection nozzles can be used, for example, as cleaning nozzles that spray cleaning liquid onto machined workpieces to remove machine oil and chips, or as blow nozzles that spray air onto workpieces to inject various other fluids. It is used to make

By the way, conventional fluid injection nozzles, for example,
As known from Japanese Utility Model Application Publication No. 60-21385, the position of the injection port is usually fixed.
Therefore, when this nozzle is used as a cleaning nozzle for a workpiece whose surface to be cleaned is relatively wide, a large number of cleaning nozzles are disposed toward the workpiece at intervals vertically and horizontally to perform cleaning. However, although the opposing surfaces of each nozzle are sufficiently cleaned,
The surrounding area is likely to be insufficient, which usually forces a large number of nozzles to be closely spaced. Furthermore, it is preferable to inject the cleaning liquid (air) intermittently, but conventionally, for this intermittent injection, a solenoid valve is provided between the pump and the nozzle, and the solenoid valve opens and closes the fluid passage. There is.

On the other hand, it is conceivable to move the injection port position of the fluid injection nozzle relative to the workpiece, but this requires a separate drive source for this movement.
Sprinklers are fluid injection nozzles that move the position of the injection port, but in this case, the nozzle rotates and the direction of the injection port changes in the circumferential direction of the nozzle, so although it can be used for sprinkling water, it is also used for cleaning workpieces. etc., making it difficult to fully utilize it.

(Objective of the Invention) The present invention provides a fluid injection nozzle that can move the position of the fluid injection port approximately linearly and periodically without requiring a separate driving source,
The purpose is to make it possible to perform water blowing off, etc. economically with a small number of nozzles.

(Structure of the Invention) The fluid injection nozzle of the present invention includes an inner cylinder having a slit extending substantially axially in the cylinder wall and to which fluid is supplied from one end, and a cylinder wall rotatably supported on the outer periphery of the inner cylinder. A lead-shaped (helical) slit is provided with an outer cylinder formed by making the slit wall surface inclined with respect to the centrifugal direction. In this case, the slits in the inner cylinder and the slits in the outer cylinder intersect with each other at at least one point, and the fluid is injected through both slits at this intersection, and the jetting force is applied to the outer cylinder. The rotational force of the outer cylinder is obtained by acting on the inclined slit wall surface of the cylinder. Therefore, as the outer cylinder rotates, the intersection position of both the slits of the inner cylinder and the outer cylinder, that is, the position of the injection port, moves in the axial direction.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

This embodiment is a case where a fluid jet nozzle is used as a nozzle for cleaning a workpiece. As shown in FIG. 1, the fluid injection nozzle 1 is arranged in a cleaning box 3 for a workpiece 2, and the workpiece 2 is transported together on a pallet 5, supported by a trolley 4, and transported to the cleaning box by a transport cylinder device 6. 3, the person enters and exits through the entrance 7. In the case of this example, the workpiece 2 is an engine cylinder block as shown in FIG.
It is supported with the cylinder head mounting surface 8 perpendicular to the pallet 5, and the fluid injection nozzles 1 are perpendicular to the outer periphery of the workpiece 2 and horizontally above the workpiece 2, with a plurality of them arranged at equal intervals. It is located. Incidentally, the entrance/exit 7 of the cleaning box 3 is provided with a door 10 that can be opened and closed by a door cylinder device 9, and the vertical fluid injection nozzle 1 located in the entrance/exit path for the workpiece 2 is opened/closed by a nozzle cylinder device 11. It is movable up and down.

Now, the specific structure of the fluid injection nozzle 1 is shown in FIGS. 3 and 4. That is, this fluid injection nozzle 1 has an inner cylinder 13 connected to one end with a fluid supply pipe 12 and the other end closed, and this inner cylinder 1.
An outer cylinder 15 is rotatably supported at both ends of the outer periphery of the cylinder 3 via bearings 14, and caps 16 and 17 are placed on both ends of the outer cylinder 15. Then, a slit 18 extending substantially in the axial direction is formed in the wall of the inner cylinder 13, and
A lead-shaped slit 19 is formed in the wall of the outer cylinder 15 and extends in the axial direction so as to intersect the slit 18 of the inner cylinder 13 at at least one point.
In this case, as shown in FIG. 4, the slit 18 of the inner cylinder 13 passes through the cylinder wall in the centrifugal direction, and the slit 19 of the outer cylinder 15 passes through the slit 18 of the inner cylinder 13.
It is wider than the cylindrical tube and passes through the cylinder wall at an angle with respect to the centrifugal direction. In other words, the slit 19 of the outer cylinder 15
One of the opposing slit wall surfaces 20 and 21 is inclined with respect to the centrifugal direction so as to receive the jet of fluid from the slit 18 of the inner cylinder 13. In this example, both the slit wall surfaces 20 and 21 are inclined, but the other slit wall surface 21 may be formed along the centrifugal direction.

To explain the operation of the fluid injection nozzle 1, when fluid is supplied under pressure to the inner cylinder 13 via the fluid supply pipe 12, the fluid is transferred to the inner and outer cylinders 13, 15.
At the position where the slits 18 and 19 intersect,
It is injected through both slits 18 and 19. In this injection, the jet of fluid coming out of the slit 18 of the inner cylinder 13 hits the slit wall surface 20 of the outer cylinder 15 and its direction is slightly inclined with respect to the centrifugal direction, giving a rotational force to the outer cylinder 15 and Cylinder 15
As a result of the rotation, the intersecting position of the inner and outer slits 18 and 19 moves linearly in the axial direction along the slit 18 of the inner cylinder 13. In other words, both slits 18,1
The fluid injection position due to the intersection of the nozzles 9 periodically and continuously moves from one side to the other in the longitudinal direction of the fluid injection nozzle 1.

Therefore, in cleaning the workpiece 2 shown in FIGS. 1 and 2, the workpiece 2 is cleaned periodically (intermittently) over the entire length of each fluid injection nozzle 1.
Cleaning liquid (or air) sprayed to each part
The entire work 2 can be cleaned with uniform cleaning power simply by setting the interval between adjacent fluid jet nozzles 1 so that the cleaning is even.

In addition, in the above embodiment, the inner and outer slits 18,1
Although 9 always intersect at one location, they may intersect at multiple locations.

Further, the fluid injection nozzle of the present invention may be used not only as the above-mentioned cleaning nozzle but also for blowing water off the surface of a workpiece, and the fluid may be gas in addition to liquid.

(Effects of the Invention) According to the present invention, since the injection position of the fluid changes continuously in a specific range depending on the injection pressure without the need for a separate driving means, a large number of fixed injection position nozzles are densely arranged in this range. It is extremely convenient because it can achieve the same effect as when fluid is intermittently injected from each nozzle by arranging the nozzles in parallel.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a front view of a cleaning device using a fluid jet nozzle, FIG. 2 is a plan view showing the positional relationship between a workpiece and the fluid jet nozzle, and FIG. FIG. 4 is a front view partially showing the nozzle in section, and FIG. 4 is a cross-sectional view of the same nozzle. 1...Fluid injection nozzle, 13...Inner cylinder, 15...
...Outer cylinder, 18, 19...Slit, 20, 21...
...Slit wall surface.

Claims (1)

[Claims] 1. An outer cylinder is rotatably supported on the outer periphery of an inner cylinder to which a slit extending approximately in the axial direction is formed in the cylinder wall and fluid is supplied from one end, and a slit in the inner cylinder is formed in the cylinder wall of the outer cylinder. On the other hand, lead-shaped slits are formed that extend in the axial direction so as to intersect at least one point, and one of the opposing slit wall surfaces of the slits in the outer cylinder is arranged so as to receive the jet of fluid from the slits in the inner cylinder. A fluid injection nozzle characterized by being inclined with respect to a centrifugal direction.