JP2512629Y2 - Vacuum suction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention uses a plurality of suction pads for sucking a work and transporting it to an arbitrary position, and connecting these to a vacuum suction source. Regarding the device.

[Prior Art] Conventionally, for example, a suction pad connected to a vacuum suction source is used to convey a thin plate-shaped work. This kind of suction pad usually has a root portion and a skirt portion integrally provided therewith, is mounted on a robot arm via a connector, and is used for transporting a work or the like. At that time, by connecting a tube from a vacuum suction source to the root of the suction pad and sucking the work, the work is sucked and conveyed by the pad under the depressurizing action of the skirt.

By the way, if the shape of the work is a long strip, for example,
When conveying objects with a shape like a ruler, if a conventional suction pad with a skirt with a circular cross section is used, the size of the suction surface at the skirt is limited because the width of the work is narrow. , The adsorption area of the skirt portion to the work becomes small, and the suction force also decreases. Further, when the work is attracted, if the center of gravity of the work and the center point of the circular cross section deviate from each other, the balance of the work is deteriorated at the time of conveyance, and accurate positioning becomes difficult when the work is detached.

From this point of view, when conveying a long strip-shaped work in the related art, a plurality of suction pads having a skirt portion having a diameter smaller than the width of the strip-shaped work are connected in series to form a strip-shaped work. Were being transported.
In this case, the tubes connected to the vacuum suction source were connected to the vacuum suction sources by the number corresponding to the number from each of the plurality of suction pads.

[Problems to be Solved by the Invention] However, in the above-described conventional technique, a large amount of space is required for the piping of the tube connected to the vacuum suction source, and the piping becomes complicated, so that the piping part is damaged or comes off. There are inconveniences such as In addition, when the piping space for the tube is limited in relation to the installation location of the vacuum suction source, piping is difficult.

Further, since each of the plurality of suction pads is individually connected to the vacuum suction source, the suction force of each suction pad is not constant due to the different tube lengths, and the desired suction force is not obtained. There is a problem that the time required to reach the negative pressure state is not constant among the suction pads.

[Means for Solving the Problems] In order to solve the above problems, a vacuum suction device according to the present invention includes a root portion connected to a vacuum suction source, and a skirt portion integrally connected to the root portion. A plurality of suction pads for suctioning a work, and a piping member forming one suction passage that connects the plurality of suction pads to the vacuum suction source in common. A suction force adjusting means is provided on each of the suction pads.

Further, the present invention is characterized in that the piping member is formed of a tube that connects the suction pads in series.

Further, according to the present invention, the piping member is composed of a single tubular member, and the suction pad is attached via an annular connecting member located outside the tubular member and displaceable in a longitudinal direction thereof. It is characterized by communicating with the internal passage of the tubular member.

Furthermore, the present invention is characterized in that the suction force adjusting means comprises a variable diaphragm.

[Operation] In the above-described vacuum suction device according to the present invention, a plurality of suction pads are connected to the vacuum suction source by providing a common suction passage, and thus the skirt portion of the suction pads is Due to the depressurizing action, a band-shaped work can be adsorbed and conveyed.

Further, by using the variable throttle as the suction force adjusting means of each suction pad, it is possible to make the air suction flow rate of each suction pad uniform.

Further, by using a displaceable annular connecting member, the distance between each suction pad can be freely changed, so that suction and transfer can be performed at a position well balanced and efficient with respect to the length of the work. it can.

[Embodiment] The vacuum suction device according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a front view of a vacuum suction device showing a first embodiment according to the present invention, FIG. 2 is a perspective view showing a state in which an adapter is connected to a suction pad, and FIG. , Second
FIG. 3 is a partial vertical cross-sectional view taken along the line III-III in the figure.

The vacuum suction device 10 of the first embodiment, as shown in FIG.
As shown in FIG. 1, a connector 13 is connected to the suction pad 12, to which a variable throttle 14 which is a suction force adjusting means and an adapter 18 having two left and right vacuum outlets 16 are connected. It is configured by connecting four in series through the tube 20.

As described above, one end side of the suction pads 12 connected in series is closed by attaching a cap 21 as an end point of the suction passage using the tube 20, and the other end side is vacuum-sucked via the tube 20 not shown. Connected to the source.

In detail, the suction pad 12 is, as shown in FIG.
It comprises a root portion 22 and a skirt portion 24 integrated with the root portion. The root portion 22 is provided with a hole 26 as shown in FIG.
By engaging with the protrusion 28 of the connector 13, it functions as a rotation stopper and a stopper. The connector 13 has a through hole 30a that communicates with it, and has a threaded portion 29 on its upper portion, and is connected to the lower portion of the variable diaphragm 14 using this threaded portion 29. further,
The upper part of the variable diaphragm 14 is connected to the adapter 18. adapter
18 is a vacuum outlet 16 for connecting the tube 20 to the left and right 2
They are individually provided and are connected in series at a predetermined interval according to the length of the work 11.

 Here, the variable diaphragm 14 will be described.

The variable throttle 14 has a box-shaped casing, and has a through hole 30b communicating with the suction passage therein. Further, a screw member 31 is provided in a direction perpendicular to the through hole 30b, and by rotating and moving the screw member 31, the through hole 30b communicating with the suction passage can be opened and closed.
An O-ring 33 is formed on the screw member 31 for maintaining airtightness.

By thus providing the variable throttle 14 and adjusting the suction flow rate of air, the suction force of each suction pad 12 can be averaged.

FIG. 3 shows a state in which the through hole 30b is fully opened in the variable diaphragm 14, and FIG. 4 shows a state in which the through hole 30b is fully closed.

Next, the operation of the vacuum suction device 10 configured as above will be described.

The four vacuum suction ports 16 of the suction pads 12 connected in series via the tube 20 serve as one common suction passage leading to the vacuum suction source. Further, a through hole reaching the inside of the skirt portion 24 is provided inside each adapter 18, and communicates with the suction passage.

In addition, the connector 13, the variable diaphragm 14, and the adapter 18 described above.
The through hole forms a through hole 30 reaching the skirt portion 24 of the suction pad 12 from the suction passage of the tube 20.

Therefore, each suction pad 12 should be
The work 11 is sucked under the depressurizing action of the skirt portion 24 by being sucked through the common suction passage via the 20.

In this case, in principle, the suction force closer to the vacuum suction source has a stronger suction force, and the suction pad at the end has a weaker suction force, but if there is a leakage flow rate, there is a difference in suction force and the desired negative pressure state is reached. The time will be different. Therefore, the suction force of each suction pad 12 can be made uniform by adjusting the variable aperture 14 provided in the suction pad 12 with a screw to open and close the through hole 30b.

That is, the variable throttle 14 is adjusted so that a sufficient flow rate is passed to each suction pad 12 in accordance with the difference in the leak flow rate of each suction pad 12. Further, when the suction flow rate of the vacuum suction source is small, one of the plurality of suction pads 12 is used.
The individual pieces come off, and thereafter, since the leak flow rate is larger than the suction flow rate, all the suction pads 12 come off. Also in this case, the leak flow rate can be reduced by adjusting the variable throttle 14 of each suction pad 12 to cope with the problem.

Further, when suction is not possible for a suction pad 12 of the plurality of pads for some reason, the passage to the suction pad 12 is closed and the variable diaphragm 14 of another suction pad 12 is adjusted. By this, suction pads that cannot be sucked
Regardless of 12, the work 11 can be transported.

Next, a second embodiment of the vacuum suction device 10 according to the present invention will be described. In this vacuum suction device 10, the first
The same reference numerals as those of the embodiment of the present invention indicate the same components, and detailed description thereof will be omitted.

FIG. 5 is a partial sectional view of a second embodiment of the vacuum suction device 10 according to the present invention, and FIG. 6 is a partial perspective view of the vacuum suction device 10 shown in FIG.

In the second embodiment, the connector 13 and the variable diaphragm 14 are connected to each of the four suction pads 12 so as to communicate with one suction passage communicating with the vacuum suction source to suction the workpiece 11. It is similar to the first embodiment.

However, the characteristic feature of the second embodiment is that each suction pad 12 is provided with a cylindrical member 32 having a circular or rectangular cross section as one suction passage and a connecting member 34 having a rectangular cross section surrounding the outer periphery thereof. This is a point at which the connection is made to communicate with the internal passage 36 of the tubular member 32, and the connecting member 34 is displaceable in the longitudinal direction thereof.

In the second embodiment, when the tubular member 32 has a circular cross section,
Although the directions of the suction pads extending in the diametrical direction of the tubular member 32 do not necessarily match, when the tubular member 32 has a rectangular cross section, the suction pads are attached to one side surface of the tubular member 32. If they are connected vertically, the directions of all the suction pads are the same, and they can contact the work 11 at the same angle.
Therefore, there is an advantage that the positioning is easy.

Specifically, one end of the cylindrical member 32 having a circular cross section is connected to a vacuum suction source (not shown), and the other end is closed by a screw 38. In the internal passage 36 of the tubular member 32, holes 40 are formed at predetermined intervals in the length direction, and the holes 40 communicate with the through holes 30b to form a suction passage. Connection member 3
The inner periphery of 4 has a circumferential groove 42 and a hole 44 that communicate with the through hole 30b.
And O-rings 46 and 47 for maintaining airtightness. The connecting member 34 has a rectangular cross section on the outer side and a circular cross section on the inner side, and is attached so as to be displaceable in the longitudinal direction of the tubular member 32.

Next, the operation of the vacuum suction device 10 according to the second embodiment will be described.

One end of the tubular member 32 is connected to a vacuum suction source (not shown), and through a hole 40 provided in the internal passage 36 of the tubular member 32,
It is sucked through the through hole 30 that reaches the skirt portion 24 through the hole portion 44 of the connecting member 34.

In this case, it is the same as in the first embodiment that the suction force can be adjusted by the variable diaphragm 14 to achieve uniformization.

Further, a mark is provided on the outer periphery of the tubular member 32, and the coupling member 34 is moved in the lengthwise direction in accordance with the mark, thereby enabling positioning. Although both the first and second embodiments have been described using four suction pads, the present invention is not limited to this, and a plurality of suction pads can be used in a number suitable for the shape of the work. It is possible.

[Advantages of the Invention] As described above, the vacuum suction device according to the present invention has the following effects and advantages.

Since a plurality of suction pads are connected to the vacuum suction source through a single common suction passage, it is possible to reduce the piping space for the tubes and eliminate connection mistakes due to erroneous piping.

Further, by using the variable diaphragm, it is possible to average the suction force even if a plurality of suction pads are arranged.

Then, since each suction pad can be displaced, it is possible to carry the workpiece in accordance with the shape of the work.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of a vacuum suction device according to the present invention, FIG. 2 is a perspective view showing a state in which an adapter is connected to a suction pad, and FIG. 3 is III-III of FIG. 4 is a vertical sectional view of a variable diaphragm, FIG. 5 is a partial sectional view of a second embodiment of the vacuum suction device according to the present invention, and FIG. 6 is a sectional view of FIG. It is a perspective view. 10 ... Vacuum suction device 12 ... Suction pad 14 ... Variable throttle 18 ... Adapter 20 ... Tube 30 ... Through hole 32 ... Cylindrical member 34 ... Connection member 36 ... Internal passage 42 ... Circumferential groove 46, 47 ... O-ring

Claims (4)

(57) [Scope of utility model registration request] 1. A plurality of suction pads for sucking a workpiece, comprising: a root portion connected to a vacuum suction source; and a skirt portion integrally connected to the root portion; Connect the suction pads in common to the vacuum suction source 1
A vacuum suction device comprising: a pipe member forming a suction passage of a book; and suction force adjusting means provided on each of the suction pads. 2. The vacuum suction device according to claim 1, wherein the piping member is composed of a tube connecting the suction pads in series. 3. The vacuum suction device according to claim 1, wherein the pipe member is composed of one tubular member, and the annular coupling member is located outside the tubular member and is displaceable in the longitudinal direction thereof. A vacuum suction device, wherein the suction pad is communicated with an internal passage of the tubular member via a. 4. The vacuum suction device according to claim 1, wherein the suction force adjusting means comprises a variable diaphragm.