JP2017124467A - Adsorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise in adsorption time, in an adsorber for adsorbing, holding and carrying a work by using negative pressure.SOLUTION: An adsorber comprises a projection for contacting with a work when adsorbing the work, on a noncontact holding surface of the adsorber for adsorbing, holding and carrying the work by using negative pressure, and the length of a projection part of the projection is the same as or longer than an interval between the noncontact holding surface and the work when becoming maximum in force for adsorbing the work by the adsorber when having no projection in a position for installing the projection. For enhancing performance, the projection uses a material except for a material used for use for preventing a side slip. The material is also used for use for moving in the vertical direction to the adsorption direction while holding the work in the adsorption direction as separate use for holding the work in the adsorption direction, and the projection uses the material having a friction coefficient becoming small as being movable in the vertical direction to the work-adsorbing direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to an adsorber that adsorbs, holds, and conveys a workpiece using negative pressure.

Conventionally, as an example of an adsorber that adsorbs, holds, and conveys a workpiece using negative pressure, for example, JP 2012-30940A. As shown in FIG. 7, the adsorber body 1 and the cover 7 are included. When the work 6 is adsorbed by the adsorber body 1, the work 6 comes into contact with a cover 7 installed around the adsorber body 1. In general, an adsorber that sucks, holds, and transports a workpiece using negative pressure has a very weak force to hold the workpiece in the horizontal direction, but the horizontal direction depends on the frictional force of the contact surface between the workpiece 6 and the cover 7. There was an effect of increasing the holding power.

On the other hand, as one of the drawbacks of an adsorber that uses negative pressure to adsorb, hold, and transport a work, there are many cases where noise is harmful due to a loud sound when adsorbing the work. In particular, when the workpiece is soft and easily vibrated, such as paper or film, there is a problem that the workpiece is vibrated by the flow of gas ejected from the adsorber and the noise is particularly harmful.

In terms of noise, in the conventional suction device shown in FIG. 7, there is no means for suppressing vibration of the workpiece 6 immediately below the non-contact holding surface 2 that most vibrates the workpiece 6. The cover 7 is merely in contact with the workpiece 6 at a position where the vibration of the separated workpiece 6 is reduced, and there is almost no effect of reducing noise.

Further, as an example of an adsorber that adsorbs, holds, and conveys a workpiece using negative pressure, for example, there is JP 2010-16208 A. As shown in FIGS. 8 and 9, the adsorber body 1 and the vortex guide channel 8 provided on the non-contact holding surface 2 of the adsorber body 1 are configured. The gas flows out from the gap 5 of the adsorber body 1 toward the non-contact holding surface 2, but this gas is guided by the vortex guide channel 8 and smoothly flows out. Thus, the workpiece can be held with a stable force without causing turbulence due to friction with the surrounding air when it flows out, and the pulsation of the workpiece is suppressed.

However, in this adsorber, in terms of noise, the vortex guide channel 8 is not in contact with the work 6, and the work vibrates due to the gas flow ejected from the adsorber body 1. There was almost no.

In addition, as an example of an adsorber that adsorbs, holds, and conveys workpieces using negative pressure, for example, “Non-contact” published on page 156 of “Automatic conveying vacuum equipment main catalog 2014 edition” issued by Schmalz Co., Ltd. There was a "pad SBS series". As shown in FIG. 10, the adsorber body 1 and the brake foot 9 provided on the non-contact holding surface 2 of the adsorber body 1 are configured. A gas flows out from the gap 5 of the adsorber body 1 toward the non-contact holding surface 2 to generate a negative pressure to adsorb the work 6. At this time, the work 6 is brake foot 9 provided on the non-contact holding surface 2. To touch. Generally, an adsorber that sucks, holds, and transports a workpiece using negative pressure has a very weak force to hold the workpiece in the horizontal direction, but it is horizontal due to the frictional force of the contact surface between the workpiece 6 and the brake foot 9. There was an effect of increasing the holding power of the direction.

However, in this adsorber, in terms of noise, the length of the protrusion of the brake foot 9 is as short as about 0.2 mm to 0.3 mm for the model number SBS-40-SF-G1 / 8-IG, The work 6 vibrated by the gas flow ejected from the adsorber body 1 and there was almost no effect of reducing noise. This problem will be described in detail below.

FIG. 3 is a graph showing the distance between the non-contact holding surface of the suction device and the work and the suction force of the suction device that sucks, holds and transports the work using a general negative pressure. In FIG. 3, the horizontal axis indicates the distance between the non-contact holding surface of the suction device and the work, and the vertical axis indicates the force for sucking the work at that position. As shown in FIG. 3, the distance between the non-contact holding surface of the adsorber and the workpiece increases as it increases from zero, and gradually decreases after reaching a maximum at a certain interval. Graphs showing similar characteristics are also published, for example, on page 20 of “Vacuum Journal 148” and page 5 of “Catalog Non-Contact Chuck XT661 (12-605-XT661)” issued by SMC Corporation. By the way, in the adsorber of the model number SBS-40-SF-G1 / 8-IG, the distance between the non-contact holding surface 2 and the work 6 is as wide as possible when the force for adsorbing the work 6 is maximized. Thus, although it depends on the operating pressure, it is designed to be approximately 0.4 mm to 0.5 mm. In this case, when the workpiece 6 is sucked, the non-contact holding surface 2 and the workpiece 6 when the force for sucking the workpiece 6 is maximized are approached by the suction force. The distance is closer than the distance between the two and eventually balances with the repulsive force of the gas flowing along the non-contact holding surface 2 and the repulsive force of the brake foot 9. The repulsive force of the gas flowing along the non-contact holding surface 2 becomes stronger as the distance between the non-contact holding surface 2 and the work 6 becomes narrower, and the work 6 is vibrated more strongly. There was a problem.

The brake foot 9 provided on the non-contact holding surface 2 is made of a rubber-like material having a large friction coefficient in order to prevent the workpiece 6 from slipping. Is held in the lateral direction strongly in contact with the brake foot 9. Although the workpiece 6 vibrates due to the gas flowing along the non-contact holding surface 2, the contact portion between the workpiece 6 and the brake foot 9 forms a node portion of the vibration of the workpiece 6, so that the vibration frequency is unified. For this reason, there is a problem that sound of a specific frequency is noticeable and unpleasant noise is generated.

In the above, the model number SBS-40-SF-G1 / 8 from the “Non-contact Pad SBS Series” published on page 156 of the “Automatic Transport Vacuum Equipment Main Catalog 2014 Edition” issued by Schmalz Co., Ltd. -The explanation was made using the IG suction device. However, even in the suction device that sucks, holds, and transports workpieces using the negative pressure of all other model numbers of the company, the length of the protrusion of the brake foot 9 is The brake foot 9 is made of a rubber-like material having a large friction coefficient in order to prevent a side slip of the work 6, which is shorter than the distance between the non-contact holding surface 2 and the work 6 when the force to adsorb 6 is maximized. As with the model number SBS-40-SF-G1 / 8-IG, there was a problem that the noise damage was particularly great.

JP2012-30940

JP 2010-16208 A

Issued by Schmalz “Automatic transfer vacuum equipment main catalog 2014 edition”, page 156

“True Vacuum Journal 148”, April 2014, p. 20

SMC Co., Ltd. “Catalog Non-Contact Chuck XT661 (12-605-XT661)”, page 5

The problem to be solved is that the harm of noise is great.

The present invention relates to an adsorber that adsorbs, holds, and conveys a workpiece using negative pressure, in order to eliminate the problems in the conventional example as described above, when the workpiece is adsorbed on the non-contact holding surface of the adsorber. Non-contact holding when the suction force of the suction device is maximum when the protrusion has a protrusion that contacts the workpiece and the protrusion has a protrusion length at the position where the protrusion is installed. The distance between the surface and the workpiece is the same or longer.

Further, the present invention provides a suction device that sucks, holds, and transports a workpiece using negative pressure in order to eliminate the above-described problems in the conventional example. It has projections that come into contact with the workpiece, and the projections are made of a material other than the material used for the purpose of preventing side slip.

Further, the present invention provides an adsorber that adsorbs, holds, and conveys a workpiece using negative pressure, in order to eliminate the above-described problems in the conventional example, while holding the workpiece in the adsorbing direction. When a workpiece is used for moving in the vertical direction, the non-contact holding surface of the suction unit has a projection that comes into contact with the workpiece when the workpiece is sucked, and the projection moves the workpiece in a direction perpendicular to the suction direction. It is characterized by using a material having a friction coefficient as small as possible.

As described above, in the suction device according to the present invention, the non-contact holding surface of the suction device has a projection that comes into contact with the workpiece when the workpiece is sucked, and the projection has a length that is set to the length of the projection. Since the distance between the non-contact holding surface and the workpiece when the suction force of the suction device is maximum when there is no protrusion at the position is the same or longer, along the non-contact holding surface at this position The repulsive force of the flowing gas is smaller than the repulsive force of the gas flowing along the non-contact holding surface at a position narrower than the distance between the non-contact holding surface and the workpiece when the force of the adsorber to adsorb the workpiece is maximum. Therefore, the vibration of the work can be weakened and the noise can be reduced.
Further, in the suction device according to the present invention, the non-contact holding surface of the suction device has a projection that comes into contact with the workpiece when the workpiece is attracted, and the projection is made of a material other than a material used for preventing side slip. By using it, when the workpiece vibrates with the gas flowing along the non-contact holding surface, the contact portion between the workpiece and the projection is not fixed and a side slip occurs, so that it does not become a fixed node portion of the workpiece vibration. The vibration frequency is distributed to both frequencies of the specific frequency, and the sound of the specific frequency becomes inconspicuous and has an effect of suppressing unpleasant noise.

As described above, the adsorber according to the present invention can provide an adsorber with low noise during adsorption.

The adsorber according to the present invention generally relates to an adsorber that adsorbs, holds, and conveys a workpiece using negative pressure generated by the Bernoulli effect, the co-under phenomenon, the eject effect, or the like.

FIG. 1 is a side view showing Embodiment 1 of the adsorber of the present invention. Example 1 FIG. 2 is a bottom view showing Example 1 of the adsorber of the present invention. Example 1 FIG. 3 is a graph showing the distance between the non-contact holding surface of the suction device and the work and the suction force of the suction device that sucks, holds and transports the work using a general negative pressure. FIG. 4 is a side view showing Example 2 of the adsorber of the present invention. (Example 2) FIG. 5 is a bottom view showing Example 2 of the adsorber of the present invention. (Example 2) FIG. 6 is a perspective view showing Embodiment 3 of the adsorber of the present invention. (Example 3) FIG. 7 is a side view showing a conventional adsorber. (Conventional example 1) FIG. 8 is a side view showing a conventional adsorber. (Conventional example 2) FIG. 9 is a bottom view showing a conventional adsorber. (Conventional example 2) FIG. 10 is a side view showing a conventional adsorber. (Conventional example 3) FIG. 11 is a bottom view showing a conventional adsorber. (Conventional example 3)

An adsorber that absorbs, holds, and transports members using negative pressure has been realized. Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view showing a first embodiment of the adsorber according to the first embodiment of the present invention, and FIG. 2 is a bottom view showing the first embodiment of the adsorber according to the first embodiment of the present invention. is there. As shown in FIGS. 1 and 2, the adsorber of the present invention has a protrusion 3 on the non-contact holding surface 2 of the adsorber body 1.

As shown in FIGS. 1 and 2, the gas fed from the gas inlet 4 is discharged from the narrow gap 5. The discharged gas flows out along the non-contact holding surface 2 through the plurality of protrusions 3 provided on the non-contact holding surface 2. Immediately below the non-contact holding surface 2, a negative pressure is generated by the gas flow, and the work 6 is adsorbed. During this suction, the work 6 is in contact with the protrusion 3.

FIG. 3 is a graph showing the distance between the non-contact holding surface of the suction unit and the work and the suction force of the suction unit that sucks, holds and transports the work using a general negative pressure. The horizontal axis indicates the distance between the non-contact holding surface and the workpiece, and the vertical axis indicates the suction force at that position. When the distance between the non-contact holding surface and the workpiece increases from zero, the suction force increases and reaches the maximum force at a certain distance. Beyond that distance, the attractive force gradually decreases. In the suction device of the first embodiment shown in FIGS. 1 and 2, the projection length of the projection 3 has the maximum adsorption force as shown in the graph shown in FIG. 3 at each position where the projection 3 is installed. Designed to be the same or longer than the distance between the non-contact holding surface and the workpiece. Further, the protrusion 3 is made of a material other than a rubber material used for preventing side slip, in other words, a material such as a Freon material that is slippery.

Generally, in an adsorber that sucks, holds, and transports a workpiece using negative pressure, the non-contact holding surface and the repulsive force of the gas flowing along the non-contact holding surface are generated between the non-contact holding surface and the workpiece. The narrower the interval, the stronger the noise, and the greater the noise that led to the workpiece being vibrated more strongly. In the suction device of the first embodiment shown in FIGS. 1 and 2, the distance between the non-contact holding surface 2 and the workpiece 6 where the protrusion 3 has a maximum suction force at each position where the protrusion 3 is installed. Therefore, the repulsive force of the gas flowing along the non-contact holding surface can be weakened while maintaining the attraction force, and the vibration of the workpiece 6 generated by the repelling force due to the gas flow is designed. Can be reduced to reduce noise. Further, since the projection 3 is made of a material other than a rubber material used for the purpose of preventing a side slip, in other words, a material that is slippery, such as a Freon material, the gas flowing along the non-contact holding surface 2 is used. In the vibration of the workpiece 6 generated by the above, the contact portion between the workpiece 6 and the projection 3 is not fixed and a side slip occurs, so that the vibration of the workpiece 6 does not become a fixed node portion. Dispersed and has the effect of suppressing unpleasant noise because the sound of a specific frequency is not noticeable. In the adsorber of Example 1 shown in FIG. 1 and FIG. 2, the case where the gas is discharged from the narrow gap 5 has been shown. Obviously, the same effect can be obtained by the same means. Moreover, in the suction device of Example 1 shown in FIG.1 and FIG.2, although the example which stuck the material, such as a fluorocarbon material, which slips easily on the non-contact holding surface 2 was shown, the non-contact holding surface was shown. If it is made of a material with a relatively small friction coefficient such as aluminum or stainless steel, the other part of the non-contact holding surface can be cut by the length of the protrusion to form the protrusion as an integral type. It is clear that the same effect can be obtained in some cases.

FIG. 4 is a side view showing a second embodiment of the adsorber according to the second embodiment of the present invention, and FIG. 5 is a bottom view showing the second embodiment of the adsorber according to the second embodiment of the present invention. is there. As shown in FIG.4 and FIG.5, in the adsorption device of this invention, it has the protrusion 3 in the non-contact holding surface 2 of the adsorption device main body 1. As shown in FIG. The difference from the suction device of the first embodiment is that the protrusion 3 is provided with a protrusion 3 other than a flat portion in the non-contact holding surface 2. In a broad sense, the area outside the gap 5 from which the gas is discharged and inside the outer periphery of the adsorber body 1 is an area where negative pressure is generated although the adsorption force is different, and can be considered as the non-contact holding surface 2. . Therefore, it is clear that the adsorber of Example 2 can achieve the same effect as the adsorber of Example 1.

FIG. 6 is a perspective view showing Embodiment 3 of the adsorber according to the third embodiment of the present invention. As shown in FIG. 6, an application example is shown in which the workpiece 6 is lifted by the sucker body 1 and the workpiece 6 is moved horizontally by the arm 7. For the adsorber body 1, the adsorber of Example 1 or the adsorber of Example 2 can be used. As shown in the first and second embodiments, the projection 3 is made of a material other than a rubber material used for preventing side slipping, in other words, a material such as a Freon material that easily slips. The workpiece 6 can be easily moved in the horizontal direction by the movement of the arm 7 in the horizontal direction while holding in the vertical direction. When a rubber-like material having a large friction coefficient is used to prevent the side slip of the workpiece as in the conventional example 2, it is contrary to the purpose of moving the workpiece 6 in the horizontal direction as described above and is appropriate. Absent. For the same reason, it is clear that the effect of reducing noise can be obtained in the use of the suction device of Example 3 as well as the suction device used for holding the workpieces of Example 1 and Example 2 in the suction direction. is there.

It can be applied to all uses when attracting, holding and transporting workpieces using negative pressure.

1 Adsorber body 2 Non-contact holding surface

3 Projection 4 Gas inlet 5 Gap 6 Work 7 Arm 8 Eddy current guide channel 9 Brake foot

Claims (3)

In an adsorber that adsorbs a work using negative pressure generated by gas ejection, the non-contact holding surface of the adsorber has a protrusion that contacts the work when the work is adsorbed, and the protrusion of the protrusion The distance between the non-contact holding surface and the workpiece when the force of the suction device to adsorb the workpiece is maximized when the length of the portion does not have the projection at the position where the projection is installed. Adsorber characterized by being the same or long.
In an adsorber that adsorbs a work using negative pressure generated by gas ejection, the non-contact holding surface of the adsorber has a protrusion that comes into contact with the work when the work is adsorbed. An adsorber characterized by using a material other than the material used for the purpose of preventing side slip. In an adsorber that adsorbs a work using negative pressure generated by gas ejection, it is used for applications in which the work moves in a direction perpendicular to the adsorbing direction while holding the work in the adsorbing direction. The holding surface has a projection that comes into contact with the workpiece when the workpiece is attracted, and the projection uses a material having a friction coefficient that is small enough to move the workpiece in a direction perpendicular to the attracting direction. Features an adsorber.

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