JPS6146240Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention uses compressed air to create a vacuum.
This invention relates to an air ejector that sucks small pieces, powder, etc. by its vacuum action.

This type of air ejector has a compressed air injection pipe attached to the outside of the main body that performs the suction action.
It is conventionally known that compressed air is ejected from this pipe and the ejected air is sucked into the main body to improve suction power (for example, dust collection power). I have yet to see anything that allows this to be done in a switchable manner.

The present invention enables suction and blowing to be performed in a switchable manner using the same compressed air, and also enables miniaturization by organically incorporating the suction mechanism and the blowing mechanism into a common housing. The suction pipe that performs suction and the ejection pipe that performs blowing are arranged concentrically inside and outside, so that suction and blowing can be performed efficiently on the same axis.

That is, the air ejector of the present invention will be described with reference to the drawings, in which a suction pipe 5 and a jet pipe 6 having a larger diameter than the suction pipe 5 are provided concentrically inside and outside and protrude from a housing 1 having a differential user 15.
A blowout gap passage 7 is formed between these two pipes, and inside the housing 1 there is a compressed air introduction chamber 19 communicating with the compressed air inlet, a suction side valve port 24 communicating with the compressed air introduction chamber 19, and a blowout side valve port 24 communicating with the compressed air introduction chamber 19. A valve port 25, a jet side communication path 28, 29 that communicates the jet side valve port 25 with the jet gap path 7, a nozzle 8 that communicates between the suction side valve port 24 and the differential user 15, and an output of this nozzle 8. A suction chamber 23 communicating with the side and the suction pipe 5 is provided,
Further, the housing 1 includes a suction-side valve body 30 and a discharge-side valve port 31 that open and close the suction-side valve port 24 and the discharge-side valve port 25, respectively, and these valve bodies 30 and 31 can be individually opened and closed. It is equipped with a suction side valve operating body 32 and an ejection side valve operating body 33 for the purpose of

Therefore, the compressed air that has entered the compressed air introduction chamber 19 passes through the nozzle 8 and is discharged from the diffuser 15 to the outside of the housing 1, creating a negative pressure in the suction chamber 23, which is then suctioned by the suction pipe 5. On the other hand, the discharge side valve operating body 3
3 opens the ejection-side valve body 31, compressed air is ejected from the ejection-side gap passage 7 through the ejection-side communication passage 29.

The present invention will now be described in detail with reference to the illustrated embodiments.

This air ejector has a single-piece structure in which all components are set in a cylindrical housing 1 that is large enough to be held with one hand.

Inside the lower opening of the housing 1, two sockets 2 and 3, large and small, are screwed in a substantially concentric arrangement, although they are slightly shifted vertically, and an annular gap 4 is formed between them. It is formed.

A suction pipe 5 is screwed into the small socket 3 on the inside, and a jet pipe 6 with a larger diameter than the suction pipe 5 is screwed onto the large socket 2 on the outside. In relation thereto, they project to the underside of the housing 1 and form therebetween an ejection gap passage 7 which communicates with the gap 4.

The suction pipe 5 is longer than the ejection pipe 6, and its lower end protrudes from the lower end opening of the ejection pipe 6.

A nozzle 8 is arranged within the housing 1 as follows.

That is, the nozzle 8 is attached to the nozzle mounting body 9.
It is mounted on the small socket 3 within the housing 1 by screwing it into the screw hole 10 of the nozzle mounting body 9 and fitting the protrusions 11 and 12 on both sides of the nozzle mounting body 9 into the recesses 13 and 14 on the upper circumference of the small socket 3. It is being

Further, a cylindrical differential user 15 is fitted into the upper side of the housing 1 .

That is, the differential user 15 has a flange 16 formed in the middle of its outer peripheral surface, and a portion 15a below the flange 16 is inserted into the housing 1, and the cap 17 is screwed onto the outside of the upper end of the housing 1. By tightening and pressing the flange 16 onto the housing 1, the differential user 15 is fixed to the housing 1, thereby also securing the nozzle mounting body 9.
connects the protrusions 11 and 12 on both sides to the differential user 15
is pressed from above by the lower surface of the small socket 3.
firmly fixed on top.

A recess 18 is provided in the upper surface of the housing 1, and this recess 18 is connected to the cap 17 as described above.
It is closed by screwing and tightening, and together with it, a compressed air introduction chamber 19 is formed.

Portion 1 above the collar 16 of the differential user 15
5b passes through the hole 20 of the cap 17 and projects outward from the compressed air introduction chamber 19.

The diffuser 15 has a conical recess 21 formed on its lower surface, and an exhaust hole 22 communicating with the recess 21. The inner diameter of the exhaust hole 22 gradually increases toward its upper opening. The recess 21 communicates with the inside of the small socket 3 and together forms a suction chamber 23, and the nozzle 8 faces into the recess 21. The suction chamber 23 communicates with the suction pipe 5.

Two valve ports 24 and 25 are formed on the left and right sides of the bottom of the recess 18 of the housing 1, one on the suction side and the other on the ejection side.

The valve port 24 communicates with the nozzle 8 via a suction side communication passage 26 which is a vertical hole bored in the housing 1, a horizontal hole 27 of the nozzle mounting body 9, and a screw hole 10.

On the other hand, the valve port 25 communicates with the ejection gap path 7 via the ejection side communication passages 28 and 29, which are also vertical holes, bored in the housing 1 and the gap 4 mentioned above.

These valve ports 24 and 25 are connected to the suction side valve body 30 and the discharge side valve body 31 in the compressed air introduction chamber 19 by operating the suction side valve operation body and the discharge side valve operation body attached to the housing 1. Each can be opened and closed separately.

That is, the valve body 30 is connected to the suction side communication path 26.
The valve body 31 is fixed (screwed) to the upper end of a valve rod 32 whose lower end protrudes outward from the left side of the lower surface of the housing 1 through
8 and its lower end is fixed (screwed) to the upper end of a valve rod 33 that protrudes outward from the lower right side of the housing 1 . These valve stems 32 and 33 are capable of vertically sliding with respect to the housing 1, and each valve stem has a push button 34 fixed to its lower end (outer end) and a coil spring that biases it downward. 35
The valve bodies 30 and 31 close the valve ports 24 and 25, respectively, by their spring force.

A nipple 36, which also serves as a compressed air inlet to the compressed air introduction chamber 19, is protruded from the outside of the cap 1.

To use this air ejector, connect the air supply hose 37 to the nipple 36 and supply compressed air into the compressed air introduction chamber 19.
Grip the housing 1 and put your finger on the push button 34 of the suction side valve stem 32 or the push button 34 of the ejection side valve stem 33, and then press the valve stem 32 or 33 against the coil spring 3.
5 to open the valve body 30 or 31.

When the suction side valve body 30 is opened, the compressed air in the compressed air introduction chamber 19 flows through the opened valve port 24, the suction side communication passage 26, the horizontal hole 27 of the nozzle mounting body 9, and the screw hole 10, as shown in the figure. through nozzle 8
is injected into the suction chamber 23. This injected air immediately passes through the suction chamber 23 and is exhausted from the exhaust hole 22 of the differential user 15 (if an exhaust hose is connected to the differential user 15, it is exhausted through this, otherwise it is immediately released into the atmosphere). ), the suction chamber 23
There is a negative pressure inside, which causes the suction pipe 5 to perform a suction (air intake) action.

On the other hand, when the ejection side valve body 31 is opened, the compressed air in the compressed air introduction chamber 19 is ejected from the ejection gap path 7 through the opened valve port 25, the ejection side communication passages 28 and 29, and the gap 4. Ru.

Thus, depending on which of the left and right push buttons 34, 34 is pressed, the suction action by the suction pipe 5 and the jetting of compressed air from the jetting pipe 6 (the jetting gap path 7) can be arbitrarily selected. , suction and blow-off can be controlled by pressing a button, such as carrying the small pieces picked up at one position on the suction pipe 5 to another position and blowing them away, or suctioning some things and blowing them away from others. This allows for easy and efficient switching on the same axis.

Furthermore, by pressing both the left and right push buttons 34, 34 at the same time, compressed air can be ejected from the ejection pipe 6 and suction can be performed from the suction pipe 5 at the same time.
This is useful, for example, when blowing out powder in a hole and simultaneously removing it by suction.

In the above embodiment, both the valve bodies 30 and 31 on the suction side and the ejection side are opened and closed by manual operation, but they may be opened and closed automatically using a solenoid valve structure.

Further, although the housing 1, the nozzle 8, and the differential user 15 are made separate from each other, all three or any two of them may be integrated.

As is clear from the above description, according to the air ejector of the present invention, suction and blowing can be performed in a switchable manner using the same compressed air.
In addition, the suction mechanism and blowout mechanism are organically integrated into a common housing, allowing for miniaturization.
Moreover, in particular, the suction pipe that performs suction and the jet pipe that performs blowing are arranged concentrically inside and outside, so that suction and blowing can be efficiently performed on the same axis.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of the present invention. 5...Suction pipe, 6...Ejection pipe, 15...
... Diffusion user, 1 ... Housing, 7 ... Ejection gap path, 36 ... Nibble that also serves as a compression inlet,
19... Compressed air introduction chamber, 24, 25...
Suction side and ejection side valve ports, 28, 29...Ejection side communication path, 8...Nozzle, 23...Suction chamber,
30, 31... Suction side and ejection side valve bodies, 32,
33... Valve rod that opens and closes the valve body.

Claims (1)

[Scope of utility model registration request] A suction pipe 5 and a larger diameter ejection pipe 6
are concentrically arranged inside and outside the housing 1 and projecting from the housing 1 having the differential user 15, and forming a jet gap path 7 between these two pipes.
Inside, there is a compressed air introduction chamber 19 communicating with the compressed air inlet, a suction side valve port 24 and a jetting side valve port 25 communicating with the compressed air introducing chamber 19, and the jetting side valve port 25 and the jetting gap path 7. A nozzle 8 communicates between the suction side valve port 24 and the diff user 15, and a suction chamber 23 communicates the output side of the nozzle 8 with the suction pipe 5. Housing 1
has a built-in suction side valve body 30 and a spout side valve port 31 that open and close the suction side valve port 24 and the spout side valve port 25, respectively, and these valve bodies 30, 31.
An air ejector characterized by being equipped with a suction side valve operation body 32 and a discharge side valve operation body 33 for individually opening and closing the air ejector.