JPH0343439Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a mounting structure for a vacuum ejector pump, and particularly to a mounting structure for mounting a vacuum breaking device to the main body of a vacuum ejector pump.

[Conventional technology]

2. Description of the Related Art Conventionally, the mounting structure shown in FIGS. 7 to 9 is known as a mounting structure for mounting a pneumatic vacuum breaking device to a vacuum ejector pump.

The following will explain based on FIGS. 7 to 9. In the figure, 1 is a main body of a vacuum ejector pump provided with a joint, which will be described later, and 2 is a solenoid valve for supplying compressed air.

First, by opening the pump supply solenoid valve 2 for supplying compressed air to the main body 1 of the vacuum ejector pump, compressed air from the compressor 3 is supplied from the supply port 1a, passes through the pump supply solenoid valve 2, and sequentially, The pressure is reduced in a nozzle (not shown) to generate a vacuum. The check valve 1c is opened by the action of the vacuum air, and this vacuum air is passed through the filter 1.
It is filtered through d and guided to a pad 5 connected to a vacuum pipe 4, and the adsorbed material 6 is adsorbed onto the pad 5. 1b
is a muffler, and the air from the final stage nozzle is exhausted through the muffler 1b.

After the object 6 to be attracted is held for a predetermined period of time, or after being moved to a desired location while being held, it is detached from the pad 5. Padded 5
In order to remove the adsorbed object 6 from the pad 5, it is sufficient to stop the inflow of compressed air by closing the pump supply solenoid valve 2. However, when compressed air is sent into the pad 5, the inside of the pad 5 is The vacuum is broken, the adsorption force is lowered, and the object 6 to be adsorbed is quickly separated.

7a is a pneumatic vacuum breaking device for breaking the vacuum inside the pad, and 8 is this pneumatic vacuum breaking device 7a.
Joints 9 and 10 are used to attach the pneumatic vacuum breaking device 7a to the joint 8 of the ejector pump body 1. The mounting screws 9 and 10 are provided as a pair so that when a destructive device is attached to these screws, it can be securely attached. 11 is the first female thread provided in the joint 8, which leads to the primary pressure of compressed air, 12 is the second female thread provided in the joint 8, which leads to the secondary pressure of compressed air, and 13 is the main body. A third female thread provided in pad 1 leads to a vacuum inside pad 5. Note that when the female threads 11 to 13 are not used as passages, they are closed with blind screws (not shown).

In the above configuration, the pneumatic vacuum breaking device 7a
Therefore, in order to break the vacuum inside the pad 5, the first female screw 11 is blinded, the second female screw 12 and the third female screw 13 are communicated, and the solenoid valve 2 is opened. When closed, compressed air from the compressor 3 does not flow into the main body 1 of the vacuum ejector pump, but the compressed air stored in the air tank 14 of the pneumatic vacuum breaker 7a closes the check valve 15.
By flowing into the pad 5 through the vacuum piping 4, the vacuum is broken and the adsorbed object 6 is quickly released. This operation is similar to that of a pneumatic vacuum breaker according to an embodiment of this invention, which will be described later.

As mentioned above, the conventional pneumatic vacuum breaking device 7a
was attached to the main body 1 and in order to break the vacuum, two mounting screws 9 and 10, a first female screw 11, a second female screw 12, and a third female screw 13 were provided.

Above, we have explained the operation of attaching the pneumatic vacuum breaker 7a to the main body 1 and breaking the vacuum.Instead of this pneumatic vacuum breaker, a solenoid valve type vacuum breaker 7b is attached to the main body 1, as shown in FIG. 1 and to break the vacuum, use the second female thread 1
2 is in a blind state, and the first female thread 11 and the third
When the female thread 13 is in communication with the first female thread 11, the primary pressure compressed air guided to the first female thread 11 by opening the control solenoid valve (not shown) of the electromagnetic valve type vacuum breaker device is connected to the first female thread 13. It flows into the third female thread 13 portion communicating with the thread 11. Breaking the vacuum in the pad 5 connected to the vacuum piping 4 is the same as in the case of a pneumatic vacuum breaking device. The operation in this case is the same as that of the electromagnetic valve type vacuum breaker according to an embodiment of the invention described later.

In order to attach the conventional electromagnetic valve vacuum breaking device 7b to the main body 1 and break the vacuum, two sets of mounting screws, a first female screw, a second female screw, and a third female screw are provided. This can be said to be common to conventional pneumatic vacuum breaker devices.

[Problem that the invention attempts to solve]

However, in such a conventional vacuum ejector pump mounting structure, in order to attach the pneumatic vacuum breaker 7a or the electromagnetic valve vacuum breaker 7b to the vacuum ejector pump 1 and break the vacuum, the joint 8 In order to securely attach the above-mentioned 7a or 7b to the main body of the vacuum ejector pump, two sets of mounting screws 9 and 10, which are exclusively used for mounting, are at least essential. For this reason, there were problems in that the structure was complicated, the number of parts was large, and the cost was high.

This idea was made to solve the above-mentioned problems with conventional pumps, and it devised a joint that allows both pneumatic and electromagnetic valve types to be attached to the main body of the vacuum ejector pump as a vacuum breaking device. In particular, this vacuum ejector pump can reduce the number of female threads in the joint to the minimum necessary, easily attach both of the above types of destruction devices to the ejector pump body, and has a small number of parts and is inexpensive. The purpose is to provide a mounting structure for

[Means for solving problems]

Therefore, in the mounting structure of the destruction device to the vacuum ejector pump body according to this invention,
First to third female threads are provided for the compressed air communication passage, and when installing the pneumatic vacuum breaker, the passage blocking and mounting screw with the main body is engaged with the first female thread, and the second By connecting the female thread and the third female thread, when installing the solenoid valve type vacuum breaker, the passage blocking screw and the attachment screw to the main body are inserted into the second female thread, and the first female thread is connected to the third female thread. screw and third
It can be constructed by connecting female threads of
This aims to achieve the above objectives.

[Effect]

With the above configuration, the mounting structure of the vacuum ejector pump according to this invention can use the first to third female threads as communicating holes or as communicating holes by selectively using the pneumatic type and electromagnetic type vacuum breaking devices. When not in use, it has two functions: blocking the passage and attaching it to the main body by engaging the female thread. This reduces the number of mounting screws and female threads for communication passages to the minimum necessary.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 to 6.

Reference numerals 1 to 15 indicate the same/corresponding parts as those of the conventional device to avoid duplication of explanation.

FIG. 5 is a plan perspective view of a vacuum ejector pump mounting structure according to an embodiment of the present invention in a standard set state without a vacuum breaker installed, and FIG. 6 is a partially cutaway front sectional view of the same.

In the figure, 16 is a screw for blinding when the first to third female threads 11 to 13 for communication passages are not used as communication passages;
17 is a gasket for preventing leakage of compressed air.

In the standard set state, each of the first to third female threads 11 to 13 is blinded with a blinding screw 16, and the female thread 9a into which the mounting screw 9 is screwed does not communicate with the passage through which the compressed air passes. Needless to say, there is no need to cover it with blind screws, so it can be left open. The female screws 13 provided on the main body 1 and the female screws provided on the joint 8 are 11, 12, and 9a, which are 1 smaller than the conventional device.
There aren't many.

Fig. 1 is a perspective view showing the standard set shown in Fig. 5 with the three blind screws 16 removed and the pneumatic vacuum breaker installed, and Fig. 2a shows the pneumatic vacuum breaker installed. The front sectional view shown and FIG. 2b are the same plan views.

In the figure, 9 is a mounting screw for attaching the vacuum breaking device to the joint 8 of the main body 1, 21 is a mounting screw that also serves as a passage blocker and a mounting screw for the main body, 17 is a gasket for preventing leakage of compressed air,
18 is an O-ring, 19 is a compressed air passage, and between this passage 19 and the supply port 1a there is a pump supply solenoid valve 2, and by opening and closing this pump supply solenoid valve 2, the supply port 1a side is The primary pressure compressed air and the secondary pressure compressed air on the side of the passage 19 are communicated/cut off. Insert the mounting screw 21 into the first female thread 11, and then connect the second female thread 12 and the third
The female thread 13 is in communication and serves as a passage for compressed air.

The operation in the above configuration will be explained.

When the pump supply electromagnetic valve 2 is opened, compressed air from the supply port 1a flows into the nozzle through the passage 19 to generate a vacuum, which is the same as the operation of the conventional device. In this case, the compressed air of secondary pressure is guided from the second female thread 12 to the check valve 15 of the pneumatic vacuum breaker, and the check valve 15 is moved to the left in FIG. The compressed air flows into the air tank 14 through the air tank 14a, and the air tank 14 is filled with compressed air.
At this time, the check valve 15 moves to the left and closes the inlet to the third female screw 13 communicating with the vacuum pipe 4, and the vacuum inside the vacuum pipe 4 generated by the vacuum ejector pump causes the check valve 15 to move to the left. The stop valve is kept pushed to the left by the differential pressure between the secondary pressure and the vacuum. For this reason, air tank 14
The high-pressure air does not flow out to the third female thread 13.

In this state, the object to be attracted 6 is attracted to the pad 5, so if the solenoid valve 2 is closed now, the compressed air to the second female thread 12 will be stopped, so the tip of the nozzle will be Because it communicates with the atmosphere, the secondary pressure in this area drops rapidly.
Therefore, high pressure air in the air tank 14 blows out, moves the check valve 15 to the right, closes the valve seat 15a, and opens a passage to the third female thread 13, so high pressure air flows out into the vacuum piping. It is understood that by doing so, the vacuum inside the pad 5 is broken and the object to be attracted 6 is quickly separated from the pad 5.

Figure 3 shows three blind screws 1 from the standard set.
6 is removed and a solenoid valve type vacuum breaker 7b is attached. FIG. 4 is a front sectional view of the same solenoid valve type vacuum breaker 7b.

In the figure, 20a is a valve of the vacuum breaking electromagnetic valve 20. A mounting screw 21 is inserted into the second female screw 12, and the first female screw 11 and the third female screw 13 are connected to each other to form a passage for compressed air. This passage is opened by opening the valve 20a of the vacuum breaking electromagnetic valve 20, so that compressed air can flow therethrough.

The operation in the above configuration will be explained.

When the pump supply solenoid valve 2 is opened, compressed air flows into the nozzle from the supply port 1a through the passage 19,
Generates a vacuum. In order to remove the attracted part 6 that has been attracted to the pad 5 by this vacuum, open the valve 20a of the vacuum breaking electromagnetic valve 20, and the gap between the first female thread 11 and the third female thread 13 will be removed. Since the passage is opened, primary pressure compressed air flows into the vacuum piping 4 from the first female thread 11, thereby rapidly destroying the vacuum in the pad 5, and quickly detaching the object 6. I understand.

As explained above, the mounting structure of the vacuum ejector pump according to this embodiment uses a pneumatic type or an electromagnetic valve type vacuum breaking device to connect the first to third female screws 11 to 13 to the communication holes. or when not used as a communication hole, the number of female threads can be reduced by engaging the mounting screw 21 into the female thread and having the dual functions of blocking the passage and attaching the vacuum breaker to the main body 1. It can be reduced to the minimum necessary.

According to one embodiment of the present invention, as described above,
Pneumatic or electromagnetic valve type vacuum breaking devices 7a, 7b are optionally installed in the main body 1 of the vacuum ejector pump.
can be easily attached within a short period of time, and the object 6 adsorbed to the pad 5 can be quickly removed. Further, only one screw is required for installation, and it is possible to provide a vacuum ejector pump installation structure that has a small number of parts, is easy to handle, and is inexpensive.

It goes without saying that the standard set without the above-mentioned pneumatic or electromagnetic valve type vacuum breaking device can be used as a normal vacuum ejector pump.

[Effect of idea]

As explained above, according to this invention, when a pneumatic type and a solenoid valve type vacuum breaker are attached to a vacuum ejector pump, one communication passage is no longer needed for each of the compressed air communication passages. By using this as the female thread for the mounting screw, there is no need to provide a separate female thread exclusively for mounting at the joint attachment part of the vacuum ejector pump, so the number of female threads can be reduced accordingly. This has the effect of being able to reduce the number of parts to the necessary minimum, and to provide a low-cost vacuum ejector pump mounting structure that is easy to install due to the small number of parts.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a state in which a pneumatic vacuum breaker is attached to the main body of a vacuum ejector pump according to an embodiment of this invention, and Fig. 2a is a perspective view showing a state in which a solenoid valve type vacuum breaker is attached to the main body of the vacuum ejector pump. 2b is a plan view of the same, FIG. 3 is a perspective view of the vacuum ejector pump with a solenoid valve type vacuum breaker attached to the main body, and FIG. 4 is a front sectional view of the same. Figure 5 is a perspective view of the vacuum ejector pump with no vacuum breaker attached to the main body, Figure 6 is a front sectional view of the same, and Figure 7 is a conventional vacuum ejector pump with a pneumatic vacuum breaker installed. An explanatory diagram of the installed state, Fig. 8 is an explanatory diagram of the same function, and Fig. 9 is an explanatory diagram of the same function.
The figure is an explanatory diagram of the state in which the solenoid valve type vacuum breaking device is installed. 1... Main body of vacuum ejector pump, 4... Vacuum piping, 5... Pad, 7a... Pneumatic vacuum breaker, 7b... Solenoid valve vacuum breaker, 9... Mounting screw, 11... First Female thread, 12...2nd
13...Third female thread, 21...Double-use mounting screw. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In a mounting device for attaching a pneumatic vacuum breaker or an electromagnetic valve vacuum breaker to the main body of a vacuum ejector pump, a first female thread, a second female thread, and a third female thread are used for communication passages for compressed air. is provided, and when installing the pneumatic vacuum breaking device, by engaging the passage blocking and mounting screw with the main body in the first female thread and communicating the second female thread and the third female thread, Furthermore, when installing the electromagnetic valve type vacuum breaker, by engaging the passage blocking and mounting screw with the main body into the second female thread and communicating the first female thread and the third female thread, The mounting structure of the vacuum ejector pump consists of each.