JPH0329599Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ejector, and particularly to an ejector device that supplies a working fluid such as compressed air to obtain negative pressure.

[Conventional technology]

Conventionally, in ejector devices that use such ejectors to obtain negative pressure, vacuum piping that transmits negative pressure to predetermined equipment, pneumatic piping that supplies compressed air as working fluid, etc. are individually connected to the ejector. In addition, a structure is generally constructed in which the presence or absence of negative pressure generated in the ejector is controlled by restricting the inflow of compressed air into the ejector by opening and closing a solenoid valve or the like installed in the pneumatic piping. .

[Problem that the invention attempts to solve]

However, in the structure described above, the ejector, solenoid valve, etc. are individually separated, so the space occupied by the device is larger than necessary, the piping etc. are complicated, and the aesthetic appearance is degraded. There are various problems such as.

This is particularly noticeable when a plurality of ejectors are used in parallel or when a solenoid valve is added to release the negative pressure state on the vacuum piping side.

An object of the present invention is to provide an ejector device that can reduce the occupied space, simplify piping, and further improve the aesthetic appearance.

Another object of the present invention is to provide an ejector device that can quickly and reliably control the generation and release of negative pressure in a plurality of ejector mechanisms.

[Means for solving problems]

The ejector device of the present invention includes a first block that includes an ejector mechanism therein, and a first solenoid valve that is connected to the first block and directly controls the supply and stop of the supply of working fluid to the ejector mechanism. A second block is provided coaxially with respect to the ejector mechanism, and a second solenoid valve is connected to the first block opposite to the second block and directly controls release of the negative pressure state at the vacuum port. A third block provided coaxially with the ejector mechanism and a plurality of first blocks can be directly mounted, and a plurality of vacuum ports are individually communicated with the ejector mechanism provided in each first block. A working fluid supply port common to the first solenoid valves provided in each second block, and a vacuum break path that communicates the second solenoid valve of the third block with the vacuum port are formed. and a manifold.

[Effect]

According to the above means, the ejector mechanism and the first and second solenoid valves that directly control the generation and release of negative pressure in the ejector mechanism are coaxially and integrally connected, and a desired number of the solenoid valves are connected to the manifold. This reduces the space it occupies, and also eliminates the need for vacuum piping for transmitting negative pressure to the outside, working fluid supply piping, and complex piping that connects the ejector with the first and second solenoid valves. etc., which simplifies piping and improves aesthetics.

In addition, the first and second solenoid valves provided for each ejector mechanism can control the combination of generation and release of negative pressure in each ejector mechanism when multiple ejector mechanisms are installed together.
Settings can be made quickly and reliably at will, and it is possible to perform various controls on a plurality of ejector mechanisms depending on the application.

〔Example〕

FIG. 1 is a side sectional view of an ejector device that is an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof.

The ejector device of this embodiment has a manifold M
A plurality of first blocks B1 are mounted on this manifold M and each has an ejector mechanism 1 built therein, and each of the first blocks B1 is integrally connected to the first block B1, and a working fluid such as compressed air is supplied to the ejector mechanism 1. A plurality of second blocks B2, each equipped with a first solenoid valve 2 for controlling supply and stop of supply, etc., are integrally connected to the first block B1, and release the negative pressure generated in the ejector mechanism 1. It is integrally constructed with a third block B3 provided with a second electromagnetic valve 3 for controlling operation.

The first block B1 is mounted on the manifold M via a gasket G and an auxiliary block B4, and is fixed by a plurality of fixing bolts 4.

Second block B2 and third block B3
are integrally fixed to the first block B1 by a plurality of fixing bolts 4a and a plurality of fixing bolts 4b, respectively.

The ejector mechanism 1 provided inside the first block B1 includes a differential user 1a and a nozzle 1b coaxially connected to the differential user 1a, and injects compressed air in the direction of the differential user 1a from the nozzle 1b. At this time, due to the so-called Ventilly effect, the differential user 1a and the nozzle 1b
The structure is such that negative pressure is generated at the connecting portion 1c.

The first block B1 and the auxiliary block B4 are formed with a vacuum passage 5 and a vacuum passage 5a, respectively, which communicate with the connecting portion 1c.
The vacuum flow path 5a is communicated with a vacuum port 6 formed in the manifold M.

A vacuum port 6 inside the manifold M is provided with a filter 7 that captures foreign substances sucked in from the outside toward the ejector mechanism 1. The filter 7 can be attached or removed by a lid 8 screwed onto the manifold M. freely held.

The vacuum flow path 5a in the auxiliary block B4 includes
A check valve mechanism 7a is provided, and the vacuum port 6
Gas can flow only in the direction from the ejector mechanism 1 to the ejector mechanism 1.

The first electromagnetic valve 2 provided on the second block B2 is equipped with a yoke 2a having a U-shaped cross section that is in close contact with the end face of the second block B2. A fluid chamber A is formed between them.

A cover 2b is brought into contact with the outer end surface of the yoke 2a, and the yoke 2a is secured by bolts (not shown) or the like.
is fixed to the second block B2.

The yoke 2a holds a bobbin 2c that is substantially coaxial with the ejector mechanism 1, and further holds a solenoid 2d formed by winding a conductive wire around the bobbin 2c.

Inside the bobbin 2c, there is a plunger 2e whose outer end extends through the yoke 2a and protrudes toward the fluid chamber A side and is slidable in the axial direction. and a fixed core 2f whose outer end is locked to the outer end of the yoke 2a.

A working fluid passage 9 is formed inside the second block B2, and one end thereof is opened in the fluid chamber A facing the plunger 2e. A valve seat 10 is provided to protrude from which the locked valve body 2g is brought into contact and separated.

A valve spring 2h is interposed between the outer end of the plunger 2e and the end face of the yoke 2a, and the plunger 2e is biased in a direction to bring the valve body 2g into close contact with the valve seat 10.

One of the other branched ends of the working fluid passage 9 is
It is connected to a working fluid supply port 12 formed inside the manifold M via a working fluid passage 11 provided inside the first block B1 and a working fluid passage 11a formed in the auxiliary block B4. The structure is such that compressed air or the like is supplied as a working fluid from a compressed air pressure source (not shown).

The working fluid supply port 12 is shared by a plurality of working fluid passages 11, 11a and 9 formed in each of the first block B1 and second block B2, respectively.

A plurality of working fluid passages 13 parallel to the axial direction of the plunger 2e of the first electromagnetic valve 2 are formed inside the second block B2.
One end thereof is communicated with the fluid chamber A, and the other end thereof is communicated with the inlet portion 1d of the ejector mechanism 1.

A plunger pin 14 having an outer diameter smaller than the inner diameter of the working fluid passages 13 is inserted into each of the plurality of working fluid passages 13 .

One end of the plunger pin 14 is brought into contact with the peripheral part of the valve body 2g at the outer end of the plunger 2e, and the other end is brought into contact with the inlet part 1d of the ejector mechanism 1.
It is in contact with a flapper 15 provided inside.

A flapper spring 16 having a smaller biasing force than the valve spring 2h is interposed between the flapper 15 and the end face of the nozzle 1b of the ejector mechanism 1, and the flapper spring 16 is inserted between the flapper 15 and the end face of the nozzle 1b of the ejector mechanism 1. It is biased in the direction of separating it from the valve seat 10.

The periphery of the solenoid 2d is sealed and sealed by a housing 2j made of, for example, resin, so that the solenoid 2d is protected from external moisture and dust.
d is protected.

Further, a power supply cable 2k passing through the housing 2j is connected to the solenoid 2d, and further,
It is configured so that power is supplied from the outside directly or via a connector 2l that is detachably connected to the power supply cable 2k.

Note that the connector 2l is not shown in FIG. 1 and is only shown in FIGS. 2 and 3.

In the second block B2, a guide hole 1 is provided on the side of the outer end of the plunger 2e projecting into the fluid chamber A.
7 is formed, and in this guide hole 17 is a push pin 1 which is movable in the axial direction and whose inner end facing the tip of the plunger 2e is tapered.
8 is provided.

A return spring 19 is interposed between the second block B2 and the different diameter portion of the push pin 18, and urges the push pin 18 in a direction to project outside.
8 is stopped at a position where the different diameter portion is engaged with a stopper pin 20 that penetrates through the guide hole 17 eccentrically.

Then, by pushing the push pin 18 into the second block B2 from the outside against the biasing force of the return spring 19, the tapered part of the inner end of the push pin 18 is brought into contact with the tip of the plunger 2e. The valve body 2g can be moved away from the valve seat 10 by displacing the plunger 2e in the axial direction.

In the second block B2, the ejector mechanism 1
The outlet portion 1e of the diffuser 1a is opened to the outside via an exhaust passage 21 formed in the second block B2 and an exhaust passage 21a formed in the auxiliary block B4.

A muffler 22 is provided in the exhaust passage 21a of the auxiliary block B4 to prevent noise from being generated due to compressed air being directly ejected to the outside from the diffuser 1a.

The other end of the branched working fluid passage 9 in the second block B2 is connected to the working fluid passage 23 formed in the third block B3 via the working fluid passage 23 formed through the inside of the first block B1. Fluid passage 2
Connected to 4.

The end of this working fluid passage 24 is connected to the yoke 3a of the second electromagnetic valve 3 provided in the third block B3.
and the third block B3, and a valve seat 10 is opened around the opening.
A is provided protrudingly.

Further, inside the third block B3, a vacuum breaking path 25 is formed, one end of which opens to the periphery of the valve seat 10a in the fluid chamber A1.

The other end of this vacuum breaking path 25 is a vacuum breaking path 25a formed in the first block B1, and
At the connection between the first block B1 and the auxiliary block B4, an O-ring 21b is provided at the connection between the exhaust passage 21 and the exhaust passage 21a, and an O-ring 21 is provided concentrically with the O-ring 21b.
c and the auxiliary block B4.
The vacuum port 6 of the manifold M is communicated with the periphery of the filter 7 via a vacuum break path 25c formed through the manifold M and a vacuum break path 25d formed in the manifold M.

Working fluid passage 24 in third block B3
On the path, there is a flow rate adjustment mechanism 26 consisting of a body 26 to which the third block B3 is screwed, a needle 26b whose inner end forms a tapered part 26c and which is screwed to the body 26a, and a lock nut 26d. The needle 26b is appropriately rotated from the outside to connect the tapered portion 26c and the working fluid passage 24.
The flow rate of the working fluid that passes through the working fluid passage 24 and is supplied to the second electromagnetic valve 3 can be adjusted by changing the gap between the working fluid passage 24 and the second electromagnetic valve 3.

The structure of the second solenoid valve 3 is almost the same as that of the first solenoid valve 2 described above, and to avoid duplication, a description of the configuration will be omitted, and in the following description, the same reference numerals will be used for corresponding parts. Please cite in lowercase letters.

Moreover, as shown in FIGS. 2 and 3,
Among the openings on the upper surface of the manifold M, such as the plurality of vacuum ports 6 and the working fluid supply port 12, as well as the vacuum break path 25d, the portion where the first block B1 is not mounted is the block plate 2.
7 is hermetically hidden.

The operation of this embodiment will be explained below.

First, the solenoid 3d of the second electromagnetic valve 3 is de-energized, and the valve body 3g, which is locked to the plunger 3e, is brought into close contact with the valve seat 10a by the biasing force of the valve spring 3h, and the valve body 3g is brought into close contact with the valve seat 10a. It is cut off from the vacuum break path 25.

Furthermore, when the solenoid 2d of the electromagnetic valve 2 is in a de-energized state, the plunger 2e is biased by the valve spring 2h in the direction of protruding into the fluid chamber A, and the valve body 2g is in close contact with the valve seat 10 to prevent the working fluid from flowing. The passage 9 is closed and the ejector mechanism 1 for working fluid such as compressed air
supply is blocked.

Next, when the solenoid 2d of the first electromagnetic valve 2 is energized and a magnetic field is formed inside the bobbin 2c, the plunger 2e is moved by the magnetic force against the biasing force of the valve spring 2h. direction, and the valve body 2g is removed from the valve seat 10.

At this time, the plunger 2e has a plurality of plunger pins 14 and a flapper 15 which are in contact with the outer end.
Valve spring 2 is assisted by flapper spring 16 via
Even if the urging force of h is relatively large, the plunger 2
The separation operation of the valve body 2g from the valve seat 10 due to the displacement e is performed with good responsiveness to the energization operation to the solenoid 2d.

Then, when the valve body 2g separates from the valve seat 10,
Working fluid supply port 1 of manifold M from the outside
The compressed air supplied to the working fluid passage 11
a, a high-speed air flow that sequentially passes through the working fluid passage 11, the working fluid passage 9, the fluid chamber A, and the working fluid passage 13, flows into the nozzle 1b of the ejector mechanism 1, and is ejected from the nozzle 1b to the differential user 1a. Therefore, negative pressure is generated in the connection part 1c between the nozzle 1b and the differential user 1a, and this negative pressure is passed through the vacuum flow path 5, the check valve mechanism 7a, the vacuum flow path 5a, the filter 7, and the vacuum port 6. and is transmitted to a predetermined device (not shown).

Further, the compressed air jetted from the differential user 1a of the ejector mechanism 1 to the outlet portion 1e is transferred to the exhaust passage 2.
1. By passing through the exhaust passage 21a and the muffler 22, the air is quickly exhausted to the outside without making a lot of noise.

Further, when the first electromagnetic valve 2 is de-energized, the plunger 2 is moved by the biasing force of the valve spring 2h.
The valve body 2g, which is locked at e, comes into close contact with the valve seat 10, and the supply of compressed air to the ejector mechanism 1 is stopped, and the connecting portion 1 between the differential user 1a and the nozzle 1b is closed.
The generation of negative pressure at c is stopped.

At this time, the negative pressure state on the vacuum port 6 side is maintained by the action of the check valve mechanism 7a.

Then, at any time, the second solenoid valve 3 is energized, and the valve body 3g that is stopped from the valve seat 10a to the plunger 3e.
from the working fluid passage 9 by separating the
Working fluid passage 23, working fluid passage 24, fluid chamber A
1. Vacuum break path 25, vacuum break path 25a, communication space 25b, vacuum break path 25c, vacuum break path 25d
A predetermined flow rate of compressed air is supplied to the vacuum port 6 through the
The negative pressure state of the vacuum port 6 is immediately released.

As described above, in this embodiment, the first block B1 housing the ejector mechanism 1 therein is integrally connected to the first block B1 to control the supply and stop of the supply of working fluid to the ejector mechanism 1. A second block B2 equipped with a first electromagnetic valve 2 and a plurality of first blocks B1 can be mounted, and are individually communicated with the ejector mechanism 1 provided in each first block B1. a working fluid supply port 1 common to a plurality of vacuum ports 6 and a first solenoid valve 2 provided in each second block;
2 and a first block B1
A third solenoid valve 3 is integrally connected to the vacuum port 6 and includes a second solenoid valve 3 that controls release of the negative pressure state at the vacuum port 6.
Since the ejector mechanisms 1, the first solenoid valves 2, and the second solenoid valves 3 are integrally connected to the block B3 of Since the ejector device is mounted on the manifold M and integrated as a whole, the ejector device is miniaturized and the space it occupies is reduced. Complicated piping for communicating with the valve 3 is no longer necessary, simplifying the piping and further improving the aesthetic appearance.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.

[Effect of idea]

(1) A first block equipped with an ejector mechanism inside, and a first solenoid valve connected to the first block that directly controls supply and stop of working fluid to the ejector mechanism. A second block is provided coaxially with the ejector mechanism, and a second solenoid valve that is opposite to the second block and is connected to the first block and directly controls release of the negative pressure state at the vacuum port is provided coaxially with the ejector mechanism. A third block provided with The manifold includes a working fluid supply port common to the first solenoid valve provided in the second block, and a vacuum break path that communicates the second solenoid valve of the third block with the vacuum port. Because of this structure, the ejector mechanism and the first and second direct-acting solenoid valves that respectively control the generation and release of negative pressure in the ejector mechanism are coaxially and integrally connected, and the desired number can be installed in the manifold. By installing it, the space occupied is reduced, and vacuum piping for transmitting negative pressure to the outside,
The working fluid supply piping, furthermore, the complicated piping connecting the ejector and the first and second electromagnetic valves are completely unnecessary, so the piping is simplified and the appearance is improved.

(2) As a result of (1) above, when multiple combinations of multiple ejector mechanisms and first and second solenoid valves are installed in parallel, the space occupied by the ejector device is reduced, the piping is simplified, and the aesthetics are improved. In addition, since the combination of negative pressure generation and release for each ejector mechanism can be set quickly, reliably, and arbitrarily, it is possible to perform various controls on a plurality of ejector mechanisms depending on the application.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an ejector device that is an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof. 1...Ejector mechanism, 1a...Diff user,
1b...Nozzle, 1c...Connection part, 1d...Inlet part, 1e...Outlet part, 2...First electromagnetic valve, 2a
...Yoke, 2b...Cover, 2c...Bobbin,
2d...Solenoid, 2e...Plunger, 2f
... Fixed core, 2g ... Valve body, 2h ... Valve spring,
2j...Housing, 2k...Power cable, 2
l...Connector, 3...Second solenoid valve, 3a...
Yoke, 3b...Cover, 3c...Bobbin, 3d
...Solenoid, 3e...Plunger, 3f...
Fixed core, 3g... Valve body, 3h... Valve spring, 3j
...Housing, 3k...Power cable, 3l...
...Connector, 4...Fixing bolt, 4a, 4b...
Fixing bolt, 5, 5a... Vacuum flow path, 6... Vacuum port, 7... Filter, 7a... Check valve mechanism,
8...Lid body, 9...Working fluid passage, 10, 10a
... Valve seat, 11, 11a ... Working fluid passage, 12
...Working fluid supply port, 13...Working fluid passage, 14...Plunger pin, 15...Flapper, 16...Flapper spring, 17, 17a...Guide hole, 18, 18a...Push pin, 19, 19a
...Return spring, 20, 20a...Stop pin,
21, 21a...exhaust passage, 21b, 21c...
O-ring, 22... Silencer, 23, 24... Working fluid passage, 25, 25a... Vacuum breaking path, 25b
...Communication space, 25c, 25d...Vacuum breaking path,
26...Flow rate adjustment mechanism, 26a...Body, 26
b...needle, 26c...tapered portion, 26d...
...Rock nut, 27...Block plate,
A, A1...Fluid chamber, B1...First block,
B2...second block, B3...third block, B4...auxiliary block, M...manifold, G...gasket.

Claims (1)

[Claims for Utility Model Registration] (1) A first block having an ejector mechanism inside, and a first block connected to the first block and directly controlling supply and stop of supply of working fluid to the ejector mechanism. a second block having a first electromagnetic valve coaxially with respect to the ejector mechanism; and a second block facing the second block and connected to the first block, and directly releasing the negative pressure state at the vacuum port. A third block having a second electromagnetic valve coaxially with the ejector mechanism and a plurality of the first blocks can be directly mounted, and is provided in each of the first blocks. a plurality of vacuum ports individually communicating with the ejector mechanism; a working fluid supply port common to the first solenoid valves provided in each of the second blocks; and a working fluid supply port common to the first solenoid valves provided in each of the second blocks; An ejector device comprising: a manifold formed with a vacuum break path that communicates the solenoid valve with the vacuum port. (2) A utility model registration characterized in that a plurality of the first block, and a plurality of second blocks and third blocks integrally connected to the first block are arranged in parallel in the manifold. An ejector device according to claim 1. (3) Release of the negative pressure state at the vacuum port,
The ejector device according to claim 1, characterized in that the ejector device is operated by flowing a working fluid into the vacuum port from the working fluid supply port. (4) Utility model registration claim 1, characterized in that each of the plurality of vacuum ports in the manifold is provided with a filter.
The ejector device described in Section 1.