JPH0569366A - Vacuum supply device - Google Patents

Abstract

PURPOSE:To provide a vacuum supply device equipped with a filter to hinder clogs of filter and decrease the pressure loss due to filter part. CONSTITUTION:A filter 14 of a vacuum supply device 10a to catch the dust contained in the air inhaled from a vacuum port 12 is fitted with a filter element 68 having an undulate cross-section. The filter element 68 has a large area contacting the air, is capable of catching the dust effectively, and not likely to generate clogs. Also the pressure loss of the inflowing air can be lessened and the sucking ability of the vacuum supply device 10a be used effectively because it is practicable to structure thin the filter element 68.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum supply device for supplying a negative pressure to a device such as a suction pad that sucks and conveys a work, and more specifically, it is contained in a pressure fluid during vacuum supply. The present invention relates to a vacuum generator capable of efficiently removing dust and the like.

[0002]

2. Description of the Related Art Conventionally, there has been known a vacuum supply device for generating a negative pressure by an ejector or the like or supplying a negative pressure from a vacuum pump and supplying the negative pressure to a device such as a suction pad. In such a vacuum supply device, pressure fluid sucked into the vacuum supply device from a device such as a suction pad, for example, dust contained in air, may cause malfunction of an ejector, a valve body, or the like. Therefore, a filter having a circular or elliptical cross section is arranged in the flow path near the vacuum port which is the pressure fluid suction port of the vacuum supply device. The filter prevents dust in the pressure fluid flowing into the vacuum supply device from entering the interior of the vacuum supply device.

[0003]

In such a vacuum supply device, pressure loss of the inflowing fluid occurs in the filter portion due to the thickness of the filter itself and clogging of the filter due to dust in the inflowing pressure fluid. There is. Therefore, the pressure fluid suction capability of the ejector or the like is reduced, and the work capability of the work equipment such as the suction pad is affected.

Therefore, it is conceivable to reduce the thickness of the filter itself as a countermeasure against the pressure loss, but this has a drawback that the rate of capturing dust with respect to the pressure fluid decreases.

On the other hand, there is an idea that the cross-sectional area of the filter in the flow path should be increased in order to prevent the filter from being clogged. From such a viewpoint, a method of expanding the flow path in the filter portion of the vacuum supply device and expanding the surface area of the filter element that comes into contact with the inflowing pressure fluid (for example, in the case of a cylindrical filter, the radius of the cylinder is However, since the vacuum supply device is used by being connected in series by a manifold,
Increasing the size of each device is inconsistent with the aim of reducing the size of the entire device.

The present invention has been made in order to solve this kind of problem, and in a vacuum supply device, a vacuum supply device equipped with a filter for reducing pressure loss due to a filter portion and preventing clogging of the filter. The purpose is to provide.

[0007]

In order to achieve the above-mentioned object, the present invention provides a flow path defined inside the apparatus that connects a vacuum suction source and a vacuum port for introducing a pressure fluid. It is characterized in that a filter element having a corrugated cross section is arranged in the flow direction of the pressure fluid passing through the passage.

[0008]

By arranging a filter element having a corrugated cross section in the flow path connecting the vacuum port and the vacuum suction source, the surface area for the pressure fluid flowing in the flow path is increased without increasing the size of the filter portion. Since the dust can be reliably captured, the thickness of the filter element can be reduced. This makes it possible to reduce the pressure loss during passage of the fluid and to prevent clogging due to the increased surface area of the filter element.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vacuum supply device according to the present invention will be described in detail below with reference to the accompanying drawings with reference to preferred embodiments.

The vacuum supply apparatus according to the present embodiment includes ejector compatible type, vacuum pump compatible type, manifold compatible type and the like. First, the ejector compatible type will be described with reference to FIGS. The pump compatible type will be described with reference to FIGS. 4 and 5, and the manifold compatible type will be described with reference to FIG.

As shown in FIG. 1, the vacuum supply device 10a has a rectangular shape, and has a vacuum port 12 consisting of a one-touch type pipe joint connected to a device such as a suction pad on one side surface in a lateral direction thereof. Filter 14 formed on top
A detachable button 18 for detaching the transparent filter case 16 is formed, and a compressed air supply port 20 formed of a one-touch type pipe joint is provided on the other side surface. An exhaust port 24 and mounting screw holes 26, 26 are provided in the base 22 on the side surface in the longitudinal direction. On the upper surface, a digital display unit 28 including an LCD for displaying a pressure state, the pressure setting buttons 30a to 30d, and a pressure switch operation indicator lamp 3 are provided.
0e, pilot solenoid valve operation indicator for vacuum break valve 30
f, a pilot solenoid valve operation indicator light 30g for the supply valve, a manual 32 for the supply valve, a vacuum break valve manual 34, and an adjusting screw 36a for the flow rate adjusting valve are formed.

Inside the vacuum supply device 10a, as shown in FIG. 2, a silencer element 38 is provided inside the base 22 to muffle exhaust gas from an ejector 42, which will be described later, and discharge it to the exhaust port 24.

The ejector 4 is attached to the main body 40 of the vacuum supply device.
2, a normally closed type supply valve 44, a vacuum break valve 46, and each supply valve 44, a pilot solenoid valve 48 for supplying a pilot pressure of the vacuum break valve 46, a pilot solenoid valve for a vacuum break valve 50, a flow control valve 36 for compressed air used for vacuum breaking is provided. Further, locking members 54, 54 for locking the claws 52, 52 are provided below the filter 14. A groove 56 is provided so that the attachment / detachment button 18 is locked, and a stepped hole portion 58 into which a passage from the filter 14 is inserted is formed.

The filter 14 has a connection portion 61 formed at the bottom thereof, which has a passage 59 communicating with the vacuum port 12 and a passage 60 communicating with the ejector 42. The connecting portion 61 has a shape corresponding to the hole 58, and O-rings 62 and 64 are attached to correspond to the respective passages. Further, claws 52, 52 that engage with the locking members 54, 54 of the vacuum supply device body 40 are formed. Further, the passage 59 is provided with a check valve 66 that is opened only when air flows in. At the upper part of such a connecting portion 61, the passage 5
A filter element 68 (see FIG. 1) having a corrugated transverse section in the figure is inserted between the grooves 9 and 60 in the groove 70. The filter 14 includes a filter element 6
8 is provided with a transparent filter case 16 on the upper part thereof so that it can be visually confirmed.

The vacuum supply device 10a thus constructed
Operates as follows.

The compressed air supplied from the compressed air supply source reaches the supply valve 44 and the vacuum breaking valve 46 from the compressed air supply port 20 of the vacuum supply device. By energizing the supply valve pilot solenoid valve 48, the supply valve 44 is opened and the compressed air reaches the ejector 42. As a result, the vacuum supply device 10a generates a negative pressure, and the negative pressure causes air to flow in from the suction pad or the like. Incoming air passes from the vacuum port 12 through the passage 59 of the filter 14 to open the check valve 66 and the filter element 68.
Reach Since the filter element 68 has a corrugated cross section, the surface area in contact with the fluid is increased, dust is reliably captured, and clogging is less likely to occur due to the increased surface area. Further, the thickness of the cross section becomes thin, and the pressure loss of the fluid can be reduced.

As described above, the inflowing air that has passed through the filter element 68 reaches the ejector 42 from the passage 60,
It is discharged from the discharge port 24 through the silencer element 38.

On the other hand, when the suction state of the suction pad or the like is released, the supply valve pilot electromagnetic valve 48 of the vacuum supply device 10a is deenergized to close the supply valve 44, and the negative pressure generation in the ejector 42 is stopped. To do. At that time, the check valve 66 in the filter 14 is quickly closed to prevent the dust adhering to the filter element 68 from entering from the vacuum port 12 into an external device such as a suction pad.

After that, the pilot solenoid valve 50 for the vacuum breaking valve is energized, the vacuum breaking valve 46 is opened, and the compressed air is supplied from the compressed air supply port 20 directly through the flow rate control valve 36 to the vacuum port 12. To release the suction state of the suction pad.

If clogging or the like becomes noticeable while repeating such a series of operations, the filter 14 itself or the filter element 68 is replaced. In that case, the detachment button 18 provided on the lateral side of the vacuum supply device 10a is pushed upward (in the direction of the arrow), and the detachment button 18 is pulled out from the groove 56, and the lock is released.
By pushing the attachment / detachment button 18, the locking member 54 is disengaged from the claw 52 of the filter 14. Therefore, the filter 14 can be removed from the vacuum supply device body 40. Furthermore, when replacing only the filter element 68, the filter case 16 is removed and the filter element 68 is replaced.

Further, a vacuum supply device 1 compatible with a vacuum pump.
0b is configured as shown in FIGS. The vacuum supply device 10b is an ejector-compatible vacuum supply device 10a.
It becomes a vacuum pump compatible type only by changing the parts of the base 22 and the ejector 42. Here, the same components as those of the vacuum supply device 10a are designated by the same reference numerals, and the description thereof will be omitted.

The vacuum supply device 10b has a vacuum introduction port 74 and a vacuum breaking compressed air supply port 76 formed on the base 22b. Here, the vacuum supply device 10b is
Since the passages are rearranged by the connection block 78 used in place of the ejector 42 in the ejector-compatible vacuum supply device 10a, the respective ports 74,
The supply valve 44 and the vacuum break valve 46 are connected to 76.

The vacuum supply device 10b thus constructed
Urges a vacuum pump (not shown) to suck air from the suction pad. The other operations are the same as those of the vacuum supply device 10a, and thus the description thereof is omitted.

Further, the vacuum supply device 10a may be a manifold-compatible vacuum supply device 10c. Instead of the compressed air supply port 20 and the exhaust port 24 provided in the base 22 of the vacuum supply device 10a, the vacuum supply device 10c has a compressed air passage and a compressed air passage on both side surfaces in the longitudinal direction of the base which is substantially the manifold base. An exhaust passage is formed. An exhaust port 80, a compressed air supply port 82, and an electrical connection part 8 are provided at both ends of the vacuum supply device 10c that is continuously provided.
4 comprises an end block 85 forming part 4.

Further, the vacuum supply device 10a may be one in which the shape of the filter element 68 is changed.
As shown in FIGS. 7 and 8, in the vacuum supply device 10d, since the filter 86 is arranged in the vertical direction in the drawings, the peaks and troughs of the waves can be formed deep and the surface area can be increased.

Vacuum supply device 1 formed in this way
At 0, since the filter element 68 having a cross-sectional shape is used in the filter 14, the surface area in contact with the inflow air can be increased, and the dust is reliably captured and clogging is less likely to occur. Further, since the surface area of the filter element 68 is increased, the cross-sectional thickness can be made thinner in order to improve the dust capturing rate, so that the fluid filter element 6 can be used.
The pressure loss accompanying the passage of 8 can be reduced, and the suction capacity of the vacuum supply device 10 can be used efficiently.

Further, the filter 14 includes a check valve 66.
By providing the above, it is possible to prevent dust trapped by the filter element 68 from being introduced from the vacuum port 12 to a device such as a suction pad in cases other than air suction. Furthermore, since the filter 14 is configured to be easily attached and detached by the attachment / detachment button 18, after the filter 14 is removed from the vacuum supply device main body 40, the filter case 1
By removing 6 and replacing the filter element 68, it is possible to prevent dust from entering the ejector 42 and the supply valve 44 side from the passage 60 of the filter 14 during replacement.

Besides this, a part of the parts (base 22,
By exchanging only the ejector 42 etc. and sharing the other part, the ejector compatible type, the vacuum pump compatible type, and the manifold type can be manufactured, which is also advantageous in that the production cost is reduced.

[0029]

According to the vacuum supply device of the present invention, the following effects can be obtained.

That is, by arranging a filter element having a corrugated cross-section in the flow path connecting the vacuum port of the vacuum supply device and the vacuum suction source, the inflowing air flowing through the flow path without increasing the size of the filter portion. To increase the surface area. Therefore, the dust can be reliably captured, and the thickness of the filter element can be reduced.
Furthermore, since the pressure loss of the fluid can be reduced by reducing the thickness of the filter element, the suction capacity of the vacuum supply device can be used more effectively. In addition, clogging can be prevented by increasing the surface area of the filter element.

[Brief description of drawings]

FIG. 1 is a perspective view of a vacuum supply device according to the present invention.

FIG. 2 is an explanatory sectional view of an ejector-compatible vacuum supply device according to the present invention.

FIG. 3 is an explanatory sectional view of an ejector-compatible vacuum supply device according to the present invention.

FIG. 4 is an explanatory cross-sectional view of a vacuum pump-compatible vacuum supply device according to the present invention.

FIG. 5 is an explanatory cross-sectional view of a vacuum pump-compatible vacuum supply device according to the present invention.

FIG. 6 is a perspective view of a die vacuum supply device for a manifold according to the present invention.

FIG. 7 is an explanatory sectional view of an ejector-compatible vacuum supply device according to the present invention.

FIG. 8 is an explanatory sectional view of an ejector-compatible vacuum supply device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Vacuum supply device 12 ... Vacuum port 14 ... Filter 16 ... Filter case 18 ... Desorption button 42 ... Ejector 52 ... Claw 54 ... Locking member 66 ... Check valve 68 ... Filter element

Claims (1)

[Claims] 1. A filter element having a corrugated cross section in a flow direction of a pressure fluid passing through the flow passage, which is defined inside the apparatus and which connects a vacuum suction source and a vacuum port for introducing the pressure fluid. A vacuum supply device comprising: