JPH07178691A - Sucker pad - Google Patents

Abstract

PURPOSE:To provide a universal sucker pad for sucking a sucked body which is an ordinary plate-shaped unit or thin sheet-shaped film. CONSTITUTION:In a sucker pad 1 formed in a cup body to provide a suction hole and suction groove inserted through an internal wall of plate-shaped vertical section of this cup body, in the inside of an outer cup body 7 provided with a lip part 13, formed of rubber or soft resin, in the external peripheral edge, an inner cup body 5 provided with a cover part 3' drilled with a plurality of small holes 2 is screwed, to provide a plurality of vacuum reservoirs 4, 9 in the center and the periphery. Communicating suction holes 6, 8 of different flow path are arranged in each vacuum reservoir, and a partitioning part 11, brought into contact with a sucked body, is provided in an internal wall surface matched with a border of the inner/outer vacuum reservoirs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction pad for adsorbing a work, moving the work to another place by moving means such as a robot, and then transferring the work by separating the work,
More specifically, the present invention relates to a suction pad suitable for sucking a thin sheet-shaped film.

[0002]

2. Description of the Related Art Conventionally, loaded plate-like bodies are moved through a transfer device composed of various means, and a suction pad is used as a means for supporting a plate-like body of a work to be transferred. Is known.

For example, in Japanese Unexamined Patent Publication No. 3-293237, an intermediate thin film is provided outside a suction cup body having a suction hole at its center, and the outer peripheral edge of this intermediate thin film is located outside the outer peripheral edge of the suction cup body. A reinforcing board is provided which projects and holds the intermediate thin film from the outside. The center of the reinforcing board is fixed to the center of the suction cup body, and the outer peripheral edge of the reinforcing board is outside the outer peripheral edge of the intermediate thin film. A suction pad provided so as to project toward one side is disclosed, and the Japanese Utility Model Publication No. 5-44375 previously proposed by the present applicant.
In the publication of the publication, a cup body made of rubber or a soft resin having a dish shape in a vertical cross section having a rib portion formed on an outer peripheral portion, a reinforcing member integrally formed with the cup body, and an inner surface of the cup corresponding to the reinforcing member. In a suction tool consisting of a concentric convex portion formed to have a vented portion, in the cup inner surface extending from the rib portion and the concentric convex portion, and from the outer peripheral portion of the reinforcing member A concentric circular auxiliary rib portion is provided in the region of the root of the rib portion, and the height of the auxiliary rib portion is 0.2 to 3 mm higher than the height of the concentric circular convex portion.
A suction portion which is high and lower than the height of the rib portion, and in Japanese Utility Model Publication No. 55-11878, a chuck pivotally attached to a mounting frame so as to suck the laminated film near its side end portion, and the chuck. In the state of being adsorbed to the laminated film, and the driving means for rotating the end portion of the film from the other laminated film by rotating it about the pivot axis, and the chuck portion has a flexible sheet at its lower opening. It is provided with an adsorbing part which is arranged around the periphery of the sheet by a sealing member, and the adsorbing part has a plurality of vacuum holes penetrating the sheet. There is disclosed an automatic film take-out device in which a wire mesh or a woven fabric is stretched so as to be located and the end of the laminated film is taken out in a separated state. The Japanese Patent No. 180 has a connecting tube connected to an air tube for vacuuming through a connecting fitting in the center of one end surface and a suction hole communicating with the connecting tube centered on the other end with a large diameter. A support metal fitting having a stepped disc portion and a rubber pad having a skirt portion which is fixedly engaged with the disc portion of the support metal fitting by a step portion on the peripheral surface of the disc portion. An annular rubber pad having a skirt portion that divides this space into a plurality of radial portions is provided in the surrounding space to divide the space into a plurality of annular spaces, and these annular spaces are distributed in the circumferential direction. Then, a plurality of isolation skirt portions are provided to divide these annular spaces into a plurality of suction spaces in the circumferential direction, and the disc portion is connected to the suction holes and is opened in each of the suction spaces. A small hole is provided, and the suction hole opening and each The 引小 hole opening when the pressure in the suction space provided for it, such as made larger than the pressure in it such as itself, the suction pad having a valve plate which is closed is disclosed.

[0004]

Problems to be Solved by the Invention An adsorption pad of Japanese Patent Laid-Open No. 3-293237 for adsorbing products, parts and the like having an uneven surface by making the adsorption part a multilayer structure including a thin film for adsorption, Arrange the height of the auxiliary rib part in a unique place,
In the suction pad disclosed in Japanese Utility Model Publication No. 5-44375 which securely and securely sucks a pan-shaped body that is bent or bent, for example, when a thin sheet-shaped film is sucked, the film is sucked into the suction hole with suction. The wrinkles of the film tend to cause a leak in the lip portion provided on the peripheral edge of the pad to cause suction failure, and once sucked the film needs another means to extend the wrinkles when suction is released. In Japanese Utility Model Publication No. 55-11878, in which the laminated film is adsorbed and taken out, the film is prevented from being sucked into the adsorption hole by the wire mesh, and the negative pressure of the remaining film is also prevented by swinging by the cylinder of the chuck. Although it is provided, if there is an unexpected hole on the suction surface, the suction force will decrease sharply and there will be a problem of falling off during movement. Those of JP-A-2-83180, measured is provided with a plurality of ring-shaped suction space in the pad,
A valve plate is provided in a suction small hole provided in the suction space so that suction can be blocked, and air entering from a perforated portion of a work is prevented and a negative pressure in another suction space is maintained. However, there is a problem in that air unavoidably wraps around into the other suction space due to a delay in the operation of the valve plate, and a reduction in suction force cannot be avoided.

[0005]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a cup having a lip portion made of rubber or a flexible resin on an outer peripheral edge thereof, and a dish having a vertical cross section which is an inner side of the lip portion. In a suction pad having a plurality of suction grooves communicating with a suction hole formed on the inner wall of the cup, in the cup body,
A plurality of vacuum reservoirs having a plurality of small holes or / and slits for adsorption and the suction groove on the inner wall surface and provided with suction holes for communicating with different flow passages are provided. A partitioning portion that comes into contact with the attracted body is arranged on the inner wall surface in accordance with the boundary, and preferably one of the vacuum reservoirs is provided at the center of the suction pad, and the other vacuum reservoir is provided around the vacuum reservoir. ,
Provided is a suction pad in which the assembly structure of the vacuum reservoir and the lip portion is screwed, and the suction groove is formed by sticking a contact plate made of rubber or a flexible resin near the small hole or slit.

[0006]

The object to be adsorbed, such as a film, is divided into a plurality of small holes and slits or partitions so that it can be adsorbed and supported without being drawn into the holes, and divided vacuum reservoirs and partitions having different suction channels can be provided. Even if a leak occurs on one side, the other side prevents adsorption by the adsorption support, and if the pressure is reduced in multiple vacuum reservoirs with a time difference or if the other side is pressurized during depressurization, the adsorption release of the adsorbed body is easy. Becomes

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a longitudinal sectional view of the present invention taken along the line AA of FIG. 2, FIG. 2 shows a plan view of the suction pad shown in FIG. 1 seen from the inner face plate side, and FIG. 3 shows another embodiment. FIG.

The suction pad 1 has a suction hole 6 at the center of the ceiling.
, The inner cup body 5 in which a vacuum container 4 is formed by screwing a cylindrical container-like lid portion 3 ′ having a plurality of small holes 2, 2 ... Is screwed onto a cylindrical container-shaped outer cup body 7 provided at one corner of the ceiling, and the other side of the inner cup body side wall surface and the inner cup body side wall outer surface is provided with the other vacuum reservoir 9
And the annular slit 10 is formed at the side wall ends of the outer cup body 7 and the inner cup body 5.

A partition made of rubber or a flexible resin plate is provided on the peripheral end surface of the side wall of the inner cup body 5 to block ventilation between the small holes 2, 2 ... A portion 11 is provided by sticking, a collar portion 14 is provided on the outer peripheral edge of the side wall of the outer cup body 7, and is made of rubber or a flexible resin that is bonded to the ring 12 screwed on the outer peripheral edge of the side wall of the cup body. The lip portion 13 is attached to the collar portion 14 by packing 15
Is attached by screwing so as to press, and the suction surface provided on the inner wall 3 having a vertical cross-section dish shape including the small holes 2, 2 ... An abutting plate 16 made of rubber or a flexible resin that comes into contact with the attracted body is formed in the small hole 2
, A suction groove 17 having a plurality of steps for ventilating the small holes 2, 2, ... Is provided, and the inner wall 3 abuts the end surface of the outer cup body 7 and the ring 12 and lip portion 13 as described above. Contact plate 1 made of rubber or flexible resin similar to the plate
8 are attached in a radial pattern, and another suction groove 19 having a step for promoting ventilation to the slit 10 is provided.

A tube (not shown) is connected to each of the suction holes 6 and 8 via a joint, and an electromagnetic valve for opening and closing the tube and an ejector for reducing pressure are connected to each tube. The inner and outer cup bodies 5 and 7, the lid 3 ′, the ring 12 and the like are made of stainless steel, aluminum or the like, and the rubber or the flexible resin is urethane rubber,
Nitrile rubber, silicone rubber, vinyl, nylon, silicone resin, etc. are used.

The operation of the present invention will be described below. The plurality of suction pads 1 arranged in the transfer device press the lip portions 13 thereof against the object to be sucked, and the air in the vacuum reservoirs 4 and 9 is sucked from the suction holes 6 and 8 by the operation of an electromagnetic valve and an ejector (not shown). When sucked and decompressed, the air staying in the space between the adsorbed body and the inner wall 3 ventilates the suction grooves 17 and 19 formed in the plurality of contact plates 16 and 18 and passes through the small holes 2 or the slits 10. Is sucked and closely adheres to the inner wall 3 through the corresponding contact plate, and at the same time, is pressed against the partition portion 11, and the suction portion sandwiching the partition portion is divided into the small holes 2, 2 ... Adsorb the body.

The object to be adsorbed by the plurality of suction pads 1 is moved to a predetermined position by an operation of a transfer device (not shown) to release the suction, but the plurality of vacuum reservoirs 4 and 9 are provided to reduce the pressure. The capacity is large, and the certainty of adsorption is further improved. Even if an accidental leak occurs with the object to be adsorbed, the small one of the small holes 2 and the slit 10 separates the normal one of the adsorption,
It can be sucked and supported together with other suction pads 1 and can be moved without causing suction troubles, and even if the object to be sucked is a thin sheet such as a film, the plurality of small holes 2 and the ring-shaped slit 10 can be used for the suction. It can be opened without wrinkles and without wrinkles. By switching a solenoid valve (not shown), the vacuum reservoirs 4 and 9 have a negative pressure with a time difference, or one of them has a negative pressure and the other has a positive pressure or pressure. Can also
Due to this action, bail of a lightweight film or the like becomes easy.

Since the vacuum reservoirs 4 and 9 or the lip portion 13 are screw-fastened, the assembly is easy and the sealing performance can be secured, and the contraction height between the inner wall 3 and the tip of the lip portion 13 can be adjusted by the ring 12. The easy adjustment by tightening improves the certainty of adsorption.

Another suction pad 24 shown in FIG. 3 is provided with a plurality of vacuum reservoirs 20 and 21, and is adapted to a sheet or a to-be-adsorbed member having a thickness, for example, a plate-shaped member by an internal pad 23 in addition to the lip portion 22. However, the above-mentioned effects are exhibited.

[0015]

According to the present invention, a suction pad having a plurality of small holes and a suction surface formed by slits is provided in a plurality of vacuum reservoirs, and even if a suction leak occurs on one side during suction, the other suction surface can cope with the trouble. It is possible to move without causing wrinkles, and even a thin sheet-shaped object to be attracted facilitates positive pressure release without being sucked into the suction holes, and the released wrinkle-free object allows easy processing in the next step. A series of automations can be made possible, and work efficiency can be increased and labor can be saved.

[Brief description of drawings]

FIG. 1 shows a vertical cross-sectional view of the present invention when the suction pad of the present invention is viewed along the line AA in FIG.

FIG. 2 shows a plan view seen from the inner wall side of the suction pad.

FIG. 3 is a vertical sectional view showing another embodiment of the suction pad.

[Explanation of symbols] 1 ... ・ Suction pad 2 ・ ・ ・ ・ ・ ・ Small hole 3 ・ ・ ・ ・ Inner wall 4, 9 ・ ・ ・ ・ Vacuum reservoir 5 ・ ・ ・ ・ ・ ・ ・ ・ Inner cup body 6, 8 ... Suction hole 7 ... External cup body 10 ... Slit 11 ... Partition part 13 ... Lip part 16, 18 ... .Abutting plates 17, 19 ... suction grooves

Claims (4)

[Claims] 1. A cup portion is provided with a lip portion made of rubber or a flexible resin on the outer peripheral edge thereof, and a plurality of suction grooves communicating with suction holes are formed in an inner wall of the dish having a vertical cross section which is an inner side of the lip portion. In the suction pad provided, a plurality of small holes or / and slits for suction and the suction groove are provided on the inner wall surface in the cup body, and a plurality of suction holes having different flow paths are provided in each cup. A suction pad, characterized in that a vacuum reservoir is provided, and a partition portion that comes into contact with an object to be attracted is disposed on the inner wall surface in accordance with the boundary of the vacuum reservoir. 2. The suction pad according to claim 1, wherein one of the vacuum reservoirs is provided at the center of the suction pad, and the other vacuum reservoir is provided around the vacuum reservoir. 3. The suction pad according to claim 2, wherein an assembly structure of the vacuum reservoir and the lip portion is screwed. 4. The suction device according to claim 1, wherein the suction groove is formed by adhering an abutting plate made of rubber or a flexible resin near the small hole or slit. pad.