JP5163541B2 - Vacuum suction pad - Google Patents

Description

  The present invention relates to a vacuum pad that adsorbs using a vacuum generated by suction of air when a flat workpiece having irregularities on its surface is conveyed.

  Conventionally, when a flat workpiece is conveyed, the workpiece is conveyed by adsorbing the workpiece using a plurality of suction pads corresponding to the size of the workpiece. As the suction pad used in that case, for example, as shown in Patent Document 1, a root portion connected to a vacuum suction source and a skirt portion provided integrally with the root portion, the skirt portion is A first skirt body extending in diameter from a peripheral end portion of the root portion; a second skirt body bending inward from a peripheral end portion of the first skirt body; There has been proposed a bellows type vacuum pad having a third skirt body that is bent by expanding the diameter outward from the peripheral end portion of the skirt body.

  However, this conventional bellows type vacuum pad has a reference length of 25 mm on the surface to be adsorbed and has a concavo-convex with a maximum height of about 400 microns (400 s) or more. There is a problem that leaks increase, the inside of the pad is not evacuated, and the workpiece cannot be sucked. This state is the same even if the bellows is strongly pressed in the axial direction.

  Therefore, for example, as shown in Patent Document 2, a disk-shaped support plate, a substantially cylindrical ring-shaped wall portion formed on the lower surface of the support plate and having an adsorption space therein, and the center of the support plate A suction pipe that is attached and communicates with the suction space, and the support plate side approximately two-thirds of the ring-shaped wall portion is a soft elastic member having a Shore C hardness of 35 to 25, and the contact surface side approximately one-third. Has been proposed which is made of a soft elastic member having a shore C hardness of 15 to 10 and is superposed, and is thickened toward the support plate so that the suction space has a mortar shape.

  In this conventional suction pad, approximately two-thirds of the ring-shaped wall side of the support plate is formed of a soft elastic member having a Shore C hardness of 35 to 25, and approximately one-third of the ground surface side is approximately 15 to Shore C hardness. By forming the 10 soft elastic members and superimposing them, if there are irregularities on the adsorption surface of the workpiece, the soft soft elastic members on the ground contact surface side can absorb the irregularities and perform good adsorption it can.

  However, in the prior art of this Patent Document 2, when the workpiece attracting surface has irregularities, the irregularities can be absorbed and adsorbed by the soft elastic elastic member on the grounding surface side, but the workpiece itself is curved. In the case where the angle is deviated, there is a problem that this cannot be dealt with and cannot be adsorbed.

Japanese Patent Application Laid-Open No. 07-060674 Japanese Patent Laid-Open No. 06-307200

  The present invention has been made in view of such circumstances, and even when a flat workpiece is transported, even if the suction surface has irregularities, the irregularities are absorbed and the workpiece is also curved or deviated. It is an object to provide a vacuum pad that can be adsorbed correspondingly.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a base portion connected to a pipe from a vacuum device that evacuates the inside of the skirt portion is hermetically provided at one end portion of the bellows-like skirt portion. A disc-shaped fixing plate in which at least one or more through holes are formed in the large-diameter portion of the bellows-like skirt portion, and the other end portion comprising the large-diameter portion of the bellows-like skirt portion. And a disc-shaped edge holder made of soft rubber having at least one through hole formed in contact with the other end, and the edge holder and the fixing plate are integrally formed. In addition, the exterior surface of the edge holder is formed of a soft rubber softer than the edge holder, and an annular edge portion that comes into contact with the plate surface of the work on a plane is airtightly provided. To do

  According to a second aspect of the present invention, in the vacuum suction pad according to the first aspect, the edge holder is formed of a soft rubber having a hardness of 60 degrees.

  According to a third aspect of the present invention, in the vacuum suction pad according to the first aspect, the edge portion is formed of a soft rubber having a hardness of 30 degrees.

  According to any one of claims 1 to 3, a disk-shaped fixing plate is provided in the bellows-like skirt portion, and the fixing plate and an edge holder made of soft rubber are integrally formed. Since the edge part made of soft rubber softer than the edge holder is provided on the exterior surface of the edge holder, even when the work is attracted and transported, even if the work is deformed by bending or declination, the edge made of soft rubber The holder can absorb the deformation.

  In addition, when transporting a workpiece having irregularities on the suction surface, by fixing the edge holder in parallel to the fixing plate, the tip of an annular edge portion made of soft soft rubber provided on the exterior surface Since the surface pressure is uniform, it is possible to absorb unevenness on the suction surface and perform good suction, and to improve the efficiency of the transport operation.

  Furthermore, even if the edge holder is deformed by integrally fixing the center portion of the edge holder with the fixing plate provided in the large-diameter portion in the skirt portion, an annular shape provided on the exterior surface of the edge holder is provided. Since the edge portion can always be maintained at a right angle to the workpiece suction surface, the suction efficiency with respect to the workpiece suction surface can be increased.

  And since the other end part which consists of a large diameter part of a bellows-like skirt part and the interior surface of the said edge holder contact | abut, a workpiece | work deform | transforms by the curvature or declination of a workpiece | work, and the edge holder absorbs the deformation | transformation. Even if deformed, the bellows-like skirt portion can absorb the deformation, and the contact portion with the large-diameter portion is not separated by the action of the suction disk. As a result, even if deformation occurs due to the curvature or declination of the workpiece, good suction can be performed without breaking the vacuum in the skirt portion.

  According to the second aspect of the invention, since the edge holder is formed of soft rubber having a hardness of 60 degrees, the rigidity of the edge holder itself can be maintained, and the edge portion attached to the exterior surface can be securely fixed. In addition, even if the fixing plate in the skirt portion is integrally formed, it can be deformed with respect to the curvature and declination of the workpiece, so that the adsorption efficiency can be increased.

  According to the third aspect of the present invention, since the edge portion is formed of a soft rubber having a hardness of 30 degrees, even if there are fine irregularities on the plate surface of the workpiece, it can be adsorbed while maintaining the surface pressure. Therefore, it is possible to adsorb a flat workpiece used for any application.

It is a half sectional view of the front view showing one embodiment of the vacuum suction pad of the present invention. The disk-shaped fixing plate of one Embodiment of the vacuum suction pad of this invention is shown, (a) is a top view, (b) shows a front view. The disk-shaped edge holder with which the edge part of one Embodiment of the vacuum suction pad of this invention was attached is shown, (a) is a top view, (b) shows a front view. It is explanatory drawing of the state attracted | sucked to the flat plate-shaped workpiece | work which has the unevenness | corrugation of the vacuum suction pad of this invention, (a) is the state which the workpiece | work curved, (b) is the state which declined. It is explanatory drawing which shows the state which attached the vacuum suction pad of this invention to the suction device.

1-5 shows one Embodiment of the vacuum suction pad of this invention.
As shown in FIG. 1, a vacuum suction pad 10 according to the present invention has a base 1 to which a pipe 9 from a vacuum device is connected in an airtight manner to one end 2c of a bellows-like skirt 2. The disk-shaped fixing plate 3 provided on the large-diameter portion 2a in 2 and the disk-shaped edge holder 4 made of soft rubber are integrally formed so as to be parallel to each other. The large-diameter portion 2b formed on the other end portion 2d of the skirt portion 2 is brought into contact with the four interior surfaces 4b.

  In addition, the base 1 is provided with a through hole 1c having a female screw formed in the center. On the one end face 1a side of the base portion 1, a male screw portion formed on one end portion 9a of the pipe 9 from the vacuum apparatus is screwed into a through hole 1c in which the female screw of the base portion 1 is formed, and is airtight. It is fixed. Further, a top plate portion (one end portion) 2 c that closes one end portion of the bellows-like skirt portion 2 is brought into contact with the other end surface 1 b of the base portion 1 and is hermetically fixed by a fixing bolt 7. The top plate portion (one end portion) 2c is formed with a hole portion 2e through which the through hole 1c of the base portion 1 is inserted.

  The skirt portion 2 includes a first skirt body 2e extending outward from the peripheral end portion of the top plate portion (one end portion) 2c and an inward direction from the peripheral end portion of the first skirt body 2e. The second skirt body 2f is bent to a reduced diameter, and the third skirt body 2g is formed in a bellows shape. The second skirt body 2f has a diameter increased outward from the peripheral end of the second skirt body 2f. A large diameter portion 2a is formed at the boundary between the first skirt body 2e and the second skirt body 2f, and a large diameter portion is formed at the peripheral end portion of the third skirt portion 2g which is the other end portion 2d of the skirt portion 2. 2b is formed.

  The disk-shaped fixing plate 3 provided in the large-diameter portion 2a in the skirt portion 2 is provided with a long hole 3b penetrating through the central portion thereof as shown in FIG. As shown in FIG. 2B, a convex fixing metal fitting 3a having a circular shape is joined to the center of the through long hole 3b with both ends in the longitudinal direction of the through long hole 3b being opened. . The fixing fitting 3a is provided with a through hole 3c having a female screw formed at the center thereof.

  Further, the edge holder 4 formed integrally with the fixing bracket 3a of the fixing plate 3 is made of soft rubber having a hardness of 60 degrees. Further, as shown in FIG. 3A, the edge holder 4 is formed in a disc shape, and a hole portion 4d that fits the fixing bracket 3a of the fixing plate 3 is formed at the center thereof. Through holes 4c (four places in the figure) are formed around the hole 4d.

  Moreover, as shown in FIG.3 (b), the recessed part 4e is cyclically | annularly formed in the exterior surface 4a of the edge holder 4 in the outer peripheral part vicinity. An annular edge portion 5 is fitted in the annular recess 4e. The annular edge portion 5 is formed of a soft rubber having a hardness of 30 degrees. Further, the edge portion 5 protrudes outward from the concave portion 4e of the edge holder 4, and is gradually reduced so that the tip portion is formed at an acute angle.

  As shown in FIG. 1, the edge holder 4 and the fixing plate 3 are formed so that the reduced portion of the convex fixing metal fitting 3 a of the fixing plate 3 is provided on the side of the interior surface 4 b of the edge holder 4. While being fitted to 4d, a washer 6 is interposed on the exterior surface 4a side of the edge holder 4, and is fixed by a fastening bolt 8 to be integrally formed. In addition, the fixed plate 3 and the edge holder 4 are maintained parallel by the washer 6 in the assembled state. The washer 6 is formed in a disc shape, and a through hole through which the tightening bolt 8 is inserted is formed at the center, and the periphery of the through hole is at the same position as the through hole 4c of the edge holder 4, A through hole having the same shape is formed.

  In order to suck and convey a flat workpiece t having irregularities by suction from a vacuum apparatus using the vacuum suction pad 10 having the above configuration, first, as shown in FIG. A vacuum suction pad 10 is attached. At this time, the pipe 9 from the vacuum apparatus is screwed to the one end 1a of the base 1 of the vacuum suction pad 10 to fix it in an airtight manner.

  Next, suction from the vacuum device is started, and the vacuum suction pad 10 is brought into contact with the workpiece t by the operation of the suction machine n. At this time, in the case of a flat plate-like workpiece in which fine irregularities are formed on the suction surface, as shown in FIG. 4, the edge portion 5 of soft rubber having a hardness of 30 degrees provided on the exterior surface 4a of the edge holder 4 is used. By the surface pressure of the tip portion, the above unevenness can be absorbed and good adsorption can be performed.

  In addition, as shown in FIG. 4, when a flat workpiece is conveyed by suction of the vacuum suction pad 10, if the workpiece is bent or twisted due to the curvature or declination of the workpiece, the hardness is 60 degrees. The edge holder 4 made of soft rubber can absorb the deformation of the workpiece t and maintain the right angle between the edge portion 5 and the workpiece t surface, thereby performing good suction. At this time, the center portion of the edge holder 4 is maintained parallel to the fixing plate 3 provided at the large diameter portion in the skirt portion 2 by the washer 6 provided on the exterior surface 4a, and the washer 6 is The peripheral portion of the edge holder 4 that does not contact is deformed following the curvature or declination of the workpiece.

  And after conveying the flat workpiece | work t to arbitrary places, the suction from a vacuum device is stopped and the vacuum suction pad 10 is made to detach | leave from the workpiece | work t. Thereafter, the vacuum suction pad returns to a fixed position together with the suction device n to carry the next workpiece.

  According to the vacuum suction pad 10 of the above-described embodiment, the disk-shaped fixing plate 3 is provided in the bellows-like skirt portion 2, and the fixing plate 3 and the edge holder 4 made of soft rubber are integrally formed. In addition, since the edge portion 5 made of soft rubber softer than the edge holder 4 is provided on the exterior surface 4a of the edge holder 4, the workpiece is deformed by bending or declination when the workpiece t is sucked and conveyed. However, the deformation can be absorbed by the edge holder 4 made of soft rubber.

  In addition, when transporting a workpiece t having irregularities on the suction surface, by fixing the edge holder 4 to the fixing plate 3, the tip of the annular edge portion 5 made of soft soft rubber provided on the exterior surface 4a. Since the surface pressure is uniform, it is possible to absorb irregularities on the suction surface of the workpiece and perform good suction, and to improve the efficiency of the transporting work.

  Furthermore, even if the edge holder 4 is deformed by fixing the center portion of the edge holder 4 integrally with the fixing plate 3 provided on the large diameter portion 2a in the skirt portion 2, the exterior surface 4a of the edge holder 4 is deformed. Since the annular edge portion 5 provided on the workpiece can always be maintained at a right angle to the suction surface of the workpiece t, the suction efficiency of the workpiece t with respect to the suction surface can be increased.

  Then, the work t is deformed by bending or declination by contacting the other end 2d formed of the large-diameter portion 2b of the skirt portion 2 formed in a bellows shape and the interior surface 4b of the edge holder 4, Even if the edge holder 4 absorbs the deformation and deforms, the bellows-like skirt portion 2 absorbs the deformation, and the contact portion with the large diameter portion 2b can be detached by the same action as the suction disk. Absent. As a result, even if deformation occurs due to the curvature or declination of the workpiece t, good suction can be performed without breaking the vacuum in the skirt portion.

  Further, by forming the edge holder 4 from a soft rubber having a hardness of 60 degrees, the rigidity of the edge holder 4 itself can be maintained, the edge portion 5 attached to the exterior surface 4a can be securely fixed, and the skirt Even if it is formed integrally with the fixing plate 3 in the portion 2, it can be deformed with respect to the curvature and declination of the workpiece t, so that the adsorption efficiency can be increased.

  In addition, by forming the edge portion 5 with a soft rubber having a hardness of 30 degrees, even if there is a fine unevenness on the adsorption surface of the workpiece t, it can be adsorbed while maintaining the surface pressure, so it can be used for all purposes. The flat workpiece to be used can be adsorbed.

  Further, when the disk-shaped fixing plate 3 and the edge holder 4 are integrally formed, a disk-shaped washer 6 is interposed on the exterior surface 4 a side of the edge holder 4, and the convex shape of the fixing plate 3 is formed. Since the fastening bolt 8 is screwed and fixed to the reduced portion side of the fixing bracket 3a, the edge holder 4 made of soft rubber can be fixed securely, and the edge holder 4 and the fixing plate 3 are fixed in parallel. can do. Further, since the through hole having the same shape as the through hole 4c is formed at the same position of the washer 6, even if the edge holder 4 is deformed due to the curvature or declination of the workpiece t, the deformation of the through hole 4c of the edge holder 4 As a result, it is possible to perform the suction efficiently without disturbing the suction from the vacuum device without causing a closed state.

  In addition, in the said embodiment, although the hole drilled in the fixing plate 4 provided in the large diameter part 2a in the bellows-like skirt part 2 was demonstrated only about the case where the penetration long hole 3b was used, it is limited to this. For example, at least one or more through holes can be used at any position of the fixing plate. Further, although the description has been given only in the case where the accordion-shaped skirt portion 2 is formed using the first skirt body 2e, the second skirt body 2f, and the third skirt body 2g, the two-step unevenness is described, but the present invention is not limited thereto. For example, it is possible to deal with the case where four or five steps of unevenness are formed by increasing the skirt body. Furthermore, although the case where the annular edge portion 5 provided in an airtight manner on the edge holder 4 is formed as a separate body from the edge holder 4 has been described, the present invention is not limited thereto. Even if it forms the edge part 5 integrally, it can respond.

  It can be used when transporting a flat work having irregularities on the surface.

1 Base part 2 Skirt part 2a Large diameter part 2b Large diameter part 2c One end part (top plate part)
2d Other end portion 3 Fixing plate 3a Fixing bracket 3b Through long hole 4 Edge holder 4a Exterior surface 4b Interior surface 4c Through hole 5 Edge portion 6 Washer 7 Fixing bolt 8 Tightening bolt 9 Pipe 10 Vacuum suction pad t Work n Suction machine

Claims (3)

At one end of the bellows-like skirt part, a base part connected to a pipe from a vacuum device that evacuates the inside of the skirt part is airtightly provided,
A disk-shaped fixing plate in which at least one or more through holes are formed in the large diameter portion in the bellows-shaped skirt portion,
A disc-shaped edge holder made of soft rubber is provided on the other end portion of the large-diameter portion of the bellows-like skirt portion, which is in contact with the other end portion and has at least one through hole. The edge holder and the fixing plate are integrally formed,
The outer surface of the edge holder is formed of soft rubber softer than the edge holder, and an annular edge portion that comes into contact with the plate surface of the workpiece on a plane is airtightly provided. Adsorption pad.   The vacuum suction pad according to claim 1, wherein the edge holder is made of soft rubber having a hardness of 60 degrees.   The vacuum suction pad according to claim 1, wherein the edge portion is formed of a soft rubber having a hardness of 30 degrees.

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