JPH1028901A - Variable direction jetting nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a jetting nozzle enabling to change the jetting direction freely without being an obstacle of a feed pipe, etc. SOLUTION: This nozzle is provided with an ejector 32 for mixing plural fluids, rotary joints 34, 36 connected plural feed pipes 15, 19 for feeding the fluids with the ejector 32 by being mutually confronted against the same axis, and an jetting pipe 38 provided on the ejector 32 and jetting a mixed fluid consisting of each fluid fed to the ejector 32. Thus, the nozzle enables to change the direction independently of the feed pipes 15, 19 and the degree of freedom of the jetting direction is high. Then, the efficiency of the work using the jetting nozzle is enhanced and unevenness of the spraying is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle for jetting two or more fluids in a mixed state, and more particularly to a nozzle for increasing the degree of freedom of the jet direction and the like.

[0002]

2. Description of the Related Art In painting, a paint is sometimes sprayed on a painted surface, or in cleaning, air or the like is sprayed on a cleaning portion in some cases. Fluid injection nozzles are widely used for spraying such fluids as paint or air. FIG. 5 shows an example of a fluid ejection nozzle used to clean the inner surface of a mold. The illustrated example is a fluid ejection nozzle that mixes and injects air fed under pressure and granular dry ice, and the nozzle main pipe 12
A first rotary joint 16 for connecting the first feed pipe 14 thereto, and a second feed pipe 18 connected to the nozzle main pipe 12.
And a second rotary joint 20 for connecting the two. The nozzle main pipe 12 includes an ejector 22 having a wide internal space 25 and an elongated internal space 2.
7, and the internal space 25 is rapidly narrowed from the ejector 22 toward the injection pipe 24 in the vicinity of the connecting portion 23. The ejector 22 has a bent shape.
A rotary joint 16 is provided. This first
The first supply pipe 14 connected to a pump for pumping air is connected to the rotary joint 16. In addition, the ejector 22 is provided with a joining pipe 26 provided with a second rotary joint 20 at an end thereof in a straight line with the longitudinal direction of the injection pipe 24. Second rotary joint 20
Has a second dry ice storage tank connected to it
The feed pipe 18 is connected. Thus, in the fluid injection nozzle 10, the injection pipe 24 and the second supply pipe 18 are linear, and the second supply pipe 18 and the first supply pipe 14 are parallel to each other. The supply pipe 14 and the second supply pipe 18 can be put together. The joining pipe 26 is the ejector 2
The nozzle 28 is fixed to the ejector 22 so as to pass through the internal space 25 of the nozzle 2 and to be positioned at the connecting portion 23 of the nozzle main pipe 12. At this time, the tip portion 28 of the joining tube 26
Is set to be slightly smaller than the inner diameter of the internal space 25 in the connecting portion 23, and is narrower between the peripheral surface of the distal end portion 28 and the inner wall surface of the internal space 25 in the connecting portion 23. A gap is formed.

In order to use such a fluid injection nozzle 10, air is pressure-fed from a first supply pipe 14 to a nozzle main pipe 12 while granular dry ice is supplied from a second supply pipe 18. Then, the air flows into the internal space 2 of the ejector 22.
After passing through 5 and passing through a narrow gap at the distal end portion 28 of the joining pipe 26, the fuel is injected from the distal end of the injection pipe 24. At this time, the granular dry ice from the second supply pipe 18 passes through the joining pipe 26 and is mixed with the air that is being pumped when flowing out from the distal end portion 28 of the joining pipe 26, and then is mixed with the injection pipe 24. Injected vigorously from the tip.

[0004]

However, when working with such an injection nozzle, if the direction of injection of the injection nozzle is changed in order to clean the mold evenly, the operation is performed according to the movement. The first supply pipe 14, the second supply pipe 18, and the like also swing greatly, and they may come into contact with peripheral devices. Therefore, in order to avoid such a problem, the operator not only uses the injection nozzle but also the first feed pipe and the second feed pipe.
Attention must also be paid to the feed pipes, and a wide area for their movement must be ensured, which may reduce the work efficiency. In particular, when the work space must be used in a place where the working range is narrow, for example, when the upper mold and the lower mold cannot be widely separated from each other, even if the working area of the injection nozzle can be secured, the first feeding is not possible. Supply pipe 14 or second supply pipe 18
It is difficult to secure a moving area such as the above. If these shake and collide with the mold, and cannot move, the injection nozzle cannot be moved, and the degree of freedom of the injection direction is restricted, and the mold is cleaned. Was sometimes uneven.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an injection nozzle capable of freely changing an injection direction without obstructing a feed pipe or the like.

[0006]

According to the present invention, there is provided a variable ejection direction nozzle comprising: an ejector for mixing a plurality of fluids; and a plurality of feed pipes for feeding the fluid to the ejector. It is characterized by comprising a rotary joint to be connected, and an injection pipe provided in the ejector for ejecting a mixed fluid composed of each fluid fed to the ejector.

In the present invention, a fluid refers to a fluid material that can be ejected from a nozzle, and is not limited to a gas or a liquid, but includes a solid such as a fine substance such as a granular substance. Shall be considered.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the variable injection direction nozzle of the present invention, a plurality of feed pipes are respectively connected to an ejector via a rotary joint, and the feed pipes are coaxial and face each other. Because it is connected so that the nozzle is rotatable around its axis, without moving any feed pipe, only the nozzle is moved,
The injection direction can be changed. Hereinafter, the injection direction variable nozzle of the present invention will be described in detail with reference to FIG. The injection direction variable nozzle 30 in the illustrated example includes an ejector 32,
Rotary junctions 34 and 36 provided on both sides of the ejector 32 and an injection pipe 38 provided at the tip of the ejector 32 are provided. An internal space 44 having an open front end is formed inside the ejector 32, and the internal space 44 is formed by the injection pipe 3 connected in front of the ejector 32.
8 and the internal passage 45. In the ejector 32, the first ejector 32 is protruded to the side of the ejector 32.
A joining pipe 40 and a second joining pipe 42 are provided, and are formed at positions facing each other on the same axis. In this example, the first joint pipe 40 and the second joint pipe 42 are
Projecting perpendicular to the longitudinal direction of the ejector 3
The first joint pipe 40, the second joint pipe 42, and the injection pipe 38 are formed in a T-shape around the center 2.

The first joining pipe 40 communicates with an internal space 44 formed inside the ejector 32. Second joint pipe 4
2 is bent inside the internal space 44, and the reduced diameter end portion 43 faces forward. At the distal end 43 of the second joining pipe 42, the internal space 44 is rapidly reduced in diameter, and the outer diameter of the distal end 43 of the second joining pipe 42 is slightly smaller than the inner diameter of the internal space 44 at that position. A narrow gap 46 is formed therebetween. A rotary joint 34 is provided at an end of the first joint pipe 40, and the first feed pipe 15 is connected to the rotary joint 34. Similarly, a rotary joint is connected to an end of the second joint pipe 42. A second feed pipe 19 is connected to the rotary joint 36. Therefore, the first feed pipe 15 and the second feed pipe 15
The feed pipes 19 are opposed to each other on the same axis and
Will be connected. The first supply pipe 15 and the second supply pipe 19 are not particularly limited, such as a flexible resin pipe and a rigid metal pipe. The first
It is preferable that the feed pipe 15 and the second feed pipe 19 are formed with bent portions 17 and 21 at positions outside and near the respective rotary junctions 34 and 36 so as to be directed rearward.

[0010] The rotary joint 34 is a first joint pipe 4.
0 and the first feed pipe 15, and the rotary joint 36 is a pipe joint that connects the second joint pipe 42 and the second feed pipe 19 relatively rotatably. The injection pipe 38 is connected to the ejector 3
This is for injecting the fluid mixed by 2 toward a target, and its length is appropriately set according to the application, or a plurality of injection pipes can be connected and extended.
Further, the injection pipe 38 does not necessarily need to be separate from the ejector 32, and may be integrated with the ejector.

Using this nozzle 30, for example, air and particles (for example, cylindrical (diameter: 3 mm, length: 5 mm))
In order to mix and inject the dry ice, the first supply pipe 15 is connected to the pneumatic pump, the second supply pipe 19 is connected to the tank storing the dry ice, and the first supply pipe 15 is connected through the first supply pipe 15. Air is pumped into the ejector 32 (for example, pressure: 0.
7 MPa) and supply dry ice through the second supply pipe 19. Then, the air passes through the narrow gap 46 around the distal end 43 of the second joining pipe 42 and the second
Dry ice is sucked from the inside of the joining pipe 42, and the internal passage 45 in the injection pipe 38 is mixed with air and dry ice.
And is injected from its tip.

Such a nozzle 30 of the present invention is used, for example, by being provided in a fluid ejection device 50 as shown in FIGS. In the fluid ejection device 50 of the illustrated example, a forward / backward moving table 54 is provided on the base 52 so as to be movable in the front-rear direction, that is, in the longitudinal direction of the arm 60. That is, the horizontal moving table 56 is provided so as to be movable in the horizontal direction perpendicular to the front-rear direction,
An elevator 58 for moving the arm 60 up and down is provided on the horizontal moving table 56, and the ejection direction variable nozzle 3 of the present invention is provided at the tip of the arm 60 attached to the elevator 58.
0 is attached. The jetting direction variable nozzle 30 is fixed to the arm 60 at the first rotary junction 34 and the second rotary junction 36, and the ejector 32 is connected to the rotation axis of the first rotary junction 34 and the second rotary junction 34.
The rotary joint 36 is rotatably supported by an arm 60 about an axis (hereinafter, referred to as a mounting axis) that connects the rotation axes of the rotary johnt 36. A nozzle diverting device 62 is provided in the vicinity of the distal end of the arm 60. The piston 63 of the nozzle diverting device 62 and the injection direction variable nozzle 30 are moved in accordance with the expansion and contraction of the piston 63. Are connected so that their directions change around the mounting shaft, so that when the piston 63 is extended, the ejection direction variable nozzle 30 faces rearward, and when the piston 63 contracts, the ejection direction variable nozzle 30 faces forward. That is, a so-called swing operation is enabled.

A turning means 64 is provided on the arm 60, and the turning means 64 causes the arm 60 or the jetting direction variable nozzle 30 attached to the tip of the arm 60 to rotate. That is, as shown in FIG. 4, the injection direction variable nozzle 30 can be turned in accordance with the rotation of the arm 60. Therefore, with the variable jetting direction nozzle 30 attached to the fluid jetting device 50, the swinging operation and the turning operation can be performed, and by performing these operations simultaneously, 3
A dimensionally complex operation is enabled. Further, in the case of the fluid ejecting apparatus 50, the arm 60 itself can be three-dimensionally moved by the forward and backward moving table 54, the lateral moving table 56, the elevator 58, and the like. Therefore, the ejection direction variable nozzle 3 attached to the fluid ejection device 50
By moving the arm 60, the injection direction variable nozzle 30 can be disposed at an appropriate position, and at that position, the injection direction variable nozzle 30 can be swung and swiveled to perform any operation. The fluid can be ejected in the direction. In addition, with this injection direction variable nozzle 30, even if the injection direction is moved, the first
Since the feed pipe 15 and the second feed pipe 19 do not move,
These do not hinder the movement of the ejection direction variable nozzle 30 in the ejection direction, and there are no restrictions. Therefore, even if the working range is narrow, the spraying work can be performed without unevenness.

When the injection direction variable nozzle 30 is turned, the distance between the bent portion 17 of the first feed pipe 15 or the bent portion 21 of the second feed pipe 19 and the center of rotation is equal to the distance of the ejector 3.
It is preferable that the distance between the center of rotation 2 and the tip of the injection pipe 38 be set shorter. As shown in FIG. 4, when the jetting direction variable nozzle 30 is turned, the turning radius r2 of the bent portion 17 or the bent portion 21 becomes shorter than the turning radius r1 of the injection pipe 38, and the first feed pipe 15 Alternatively, the second feeding pipe 19 does not cause a restriction on the turning operation, and the degree of freedom of turning is improved.

In the above description, air and dry ice are used as the fluid to be ejected, but it goes without saying that the invention can be applied to other fluids. In addition, the fluid is not limited to two types, and if there is no restriction on the degree of freedom of the ejection direction of the nozzle,
Three or more fluids may be mixed.

[0016]

According to the injection direction variable nozzle of the present invention,
The direction can be changed independently of the feed pipe connected thereto, and the degree of freedom of the injection direction is high. Therefore, the efficiency of work using the injection nozzle is improved, and
Spray unevenness can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an injection direction variable nozzle of the present invention.

FIG. 2 is a plan view illustrating an example of a fluid ejecting apparatus including an ejection direction variable nozzle of the present invention.

FIG. 3 is a side view showing the fluid ejection device.

FIG. 4 is a front view showing the movement of the injection direction variable nozzle of the present invention.

FIG. 5 is a plan view of a conventional mixed fluid injection nozzle.

[Explanation of symbols]

14 first feed pipe 15 first
Feeding pipe 16: 1st rotary joint 18: 2nd
Feeding pipe 19 ... Second feeding pipe 20 ... Second
Rotary Johnite 22 ・ ・ ・ Ejector 24 ・ ・ ・ Injection tube 30 ・ ・ ・ Ejection direction variable nozzle 32 ・ ・ ・ Ejector 34 ・ ・ ・ Rotary Johnite 36 ・ ・ ・ Rotary Johnite 38 ・ ・ ・ Injection tube

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Daisuke Tahara 4-320 Tsukagoshi, Saiwai-ku, Kawasaki-shi, Kanagawa Nippon Oxide Co., Ltd. (72) Minori Mukohata 1 Kokancho, Fukuyama-shi, Hiroshima Fukuyama Kyodo In-company (72) Inventor Tasaburo Takizawa 1 Kobecho, Fukuyama-shi, Hiroshima Fukuyama Kyodo Co., Ltd.

Claims (1)

[Claims] An ejector for mixing a plurality of fluids, a rotary joint for connecting a plurality of feed pipes for feeding the fluid to the ejectors with the ejectors facing each other on the same axis, and provided on the ejectors, A jet pipe for jetting a mixed fluid composed of the supplied fluids.