TWI638759B - Negative pressure adsorber for shaped sheet objects - Google Patents

Abstract

The invention provides a negative pressure adsorber for a special-shaped sheet object. The negative pressure adsorber includes a body with at least one air chamber formed on the surface of the body, and at least one opening communicating with the air chamber is formed on the surface of the body. A plurality of ventilation holes are formed on the film, and a diffusion plate is interposed between the ventilation film and the opening. A plurality of through holes are formed on the diffusion plate, and the air chamber sequentially passes through the plurality of through holes and the holes. The plurality of ventilation holes are communicated with the outside, wherein the number of the plurality of ventilation holes distributed per unit area of the ventilation membrane is greater than the number of the plurality of through holes distributed per unit area of the diffusion plate, and the The pores of the plurality of ventilation holes are smaller than the plurality of through holes; thereby, the problem that the conventional negative pressure adsorber is not favorable for holding a shaped sheet object is improved.

Description

Negative pressure adsorber for shaped sheet objects

The present invention relates to the technology of using negative pressure to adsorb objects, and particularly relates to a negative pressure adsorber for special-shaped sheet objects.

In automated operations, it is common to use negative pressure to hold objects in order to perform actions such as moving, assembling, and packaging the objects.

Generally speaking, the negative pressure is formed by the driving operation of air extraction equipment such as an air compressor, and is guided to one or more negative pressure demand ends through a negative pressure pipeline, which may be a multi-axis The claw head of a robotic arm or the desktop of a workstation on which a negative pressure adsorption force is usually generated externally by means of at least one suction cup or an adsorber for adsorbing objects. The adsorber is usually composed of a disc-shaped element having a plurality of negative pressure suction holes, or is composed of one or more cone-shaped suction cups.

For objects waiting to be held by negative pressure, the shape of the body is usually a regular thin plate such as a quadrangle or a rectangle (such as glass plate, rubber plate, PCB, etc.), and the body has many small curved outlines. (Such as curved contours in micron order) profiled sheet objects (such as bezels for touch screens, metal film masks or conductive strips, or films for adhesives, etc.).

In the prior art, the above-mentioned conventional suction cups or adsorbers can be reliably applied to more regular thin-sheet objects (such as glass plates, rubber sheets, PCBs, etc.), such as contours of suction shapes; Limitation of molding size (usually difficult to be less than millimeters), and the negative pressure suction holes formed on traditional adsorbers are limited by traditional machining (such as boring or punching), and the pores between multiple negative pressure suction holes The minimum value can only reach 0.5mm, and even it is used to adsorb fine bends with only micron level. Contoured shaped sheet objects (such as a touch screen frame shield, a metal film mask or a conductive strip, or a film for adhesive, or an adhesive sample compounded on release paper, etc.), especially when traditional When the suction cup or the adsorber cover is attached to the edge of the profiled profile of a thin object, the adsorption effect that can be produced is not ideal.

Further, referring to FIG. 9, when a conventional suction cup or adsorber 10 is used to hold a shaped sheet object 90, a part of the negative pressure suction holes 11 a on the suction cup or the adsorber 10 can be completely covered to the held shaped sheet. The object 90 also generates a holding force; however, only a part of the hole cover of the negative pressure suction hole 11b on the suction cup or the adsorber 10 can be attached to the special-shaped sheet object 90; more specifically, the special-shaped sheet object 90 is shaped The edge of the contour, because only a part of the hole area of the negative pressure suction hole 11b is attached to the contour edge of the profiled sheet object 90, and even a part of the hole area of the negative pressure suction hole 11b communicates with the atmosphere to form a "broken vacuum". Phenomenon, causing the contoured edge of the shaped sheet object 90 to be unable to be fully absorbed and causing a soft droop phenomenon, and also affect the holding force of the entire suction cup or the adsorber 10, which is the traditional suction cup or the adsorber 10 is used to hold the shaped sheet object At 90 o'clock, the lack of suction is easy to cause the wrinkles or deformation of the shaped sheet object 90 after being held, which is the main reason for affecting the quality.

In addition, due to the constraints of traditional machining, it is difficult to increase the number of negative pressure suction holes distributed per unit area of the adsorber 10, which is also one of the factors causing the above problems.

Furthermore, it is known from the filters that are traditionally applied to vehicle air intake and exhaust systems that the filter element in the filter is usually made of a high molecular polymer, and there are many fine ventilation pores distributed on the filter element. Such fine ventilation pores have good ventilation fluency; however, the filter element technology made of the polymer is not applied in the current stage of the technology to improve the problem that the adsorber 10 is not easy to adsorb the shaped sheet object 90.

In view of this, the present invention aims to improve the problem that the conventional negative pressure adsorber is not conducive to holding the shaped sheet objects.

A preferred embodiment of the present invention is to provide a negative-pressure adsorber of a special-shaped sheet object, comprising: a device body having at least one air chamber formed therein, the device body surface being formed with at least one opening communicating with the air chamber and at least An inlet connected to a negative pressure source, the total ventilation area of the opening is larger than the inlet; a breathable film covering the opening; a plurality of vent holes are formed on the breathable film; a diffuser plate is provided on the vent Between the membrane and the opening, a plurality of through holes are formed on the diffuser plate, and the air chamber is communicated with the outside through the plurality of through holes and the plurality of ventilation holes in sequence; The number of ventilation holes distributed per unit area of the ventilation membrane is greater than the number of distribution holes per unit area of the diffuser plate, and the pores of the plurality of ventilation holes are smaller than the plurality of through holes.

More specifically, the above technical features can be further implemented as follows: the plurality of ventilation holes on the gas-permeable membrane are distributed in a cotton-gap shape. The breathable film is made of a high molecular polymer.

The layout area of the plurality of ventilation holes is larger than the profile of the profiled sheet object, and a layout of the airflow film is attached to the layout area of the plurality of ventilation holes, and the profile is based on the profile of the profiled sheet object It surrounds the periphery of the profiled sheet object.

The body is arranged on the claw head of a multi-axis robotic arm.

The device is arranged on the desktop of a workstation.

Wherein, it also includes a breathable cushion interposed between the breathable film and the diffuser plate. A plurality of perforations are formed on the breathable cushion, and the plurality of perforations are connected to the air chamber through the plurality of through holes. And the plurality of perforations communicate with the outside world through the plurality of ventilation holes; wherein the number of the plurality of ventilation holes distributed per unit area of the breathable film is greater than the number of perforations in the breathable soft The number of pads distributed per unit area, and the pores of the plurality of vent holes are smaller than the plurality of perforations. The breathable cushion is made of one of silicone rubber and PU.

The number of the plurality of perforations distributed per unit area of the breathable cushion is the same as the number of the plurality of perforations distributed per unit area of the diffusion plate.

The number of the plurality of perforations distributed per unit area of the breathable cushion is less than the number of the plurality of perforations distributed per unit area of the diffusion plate.

According to the above technical means, the technical effect of the present invention lies in that the number of distributed holes per unit area of the ventilation membrane is greater than the number of distributed holes per unit area of the diffuser plate, and the pores of the ventilation holes are smaller than the pores of the through holes. When the negative pressure adsorber is holding the shaped sheet object, the suction force of the negative pressure adsorber can evenly act on the shaped sheet object, so that the shaped sheet object is closely attached to the negative pressure adsorber, so as to facilitate the movement, assembly and Packaging and other actions, and the suction of the negative pressure adsorber can evenly act on the shaped sheet objects, which can effectively improve the phenomenon of wrinkles or deformation of the shaped sheet objects after being held.

Please refer to the following embodiments and drawings for specific implementation details of the technical means of the methods and devices described above and their production efficiency.

10‧‧‧Negative pressure adsorber

11a, 11b ‧‧‧ Negative pressure suction hole

20‧‧‧ body

21‧‧‧Air chamber

22‧‧‧ opening

23‧‧‧ Entrance

30‧‧‧ breathable film

31, 31a, 31b ‧‧‧ Ventilation holes

40‧‧‧ diffuser

40a‧‧‧face

41‧‧‧through hole

50‧‧‧ breathable cushion

51‧‧‧perforation

60‧‧‧Negative pressure tube

70‧‧‧Connector

80‧‧‧Desktop

90‧‧‧ Shaped Sheet Object

91‧‧‧Airstop film

FIG. 1 is a schematic perspective view of a first embodiment of a negative pressure adsorber of a special-shaped sheet object according to the present invention; FIG. 2 is a partially enlarged schematic view of FIG. 1; FIG. 3 is a cross-sectional view of FIG. 1; A perspective view of a second embodiment of the negative pressure adsorber of the object; FIG. 5 is a sectional view of FIG. 4; FIG. 6 is a sectional view of a third embodiment of the negative pressure adsorber of the shaped sheet object of the present invention; FIG. 7 is a schematic perspective view of a fourth embodiment of the negative pressure adsorber of the special-shaped sheet object according to the present invention; FIG. 8 is a schematic view of attaching the stop gas film to the breathable film in FIG. 7; and FIG. 9 is a traditional negative pressure adsorber holding Schematic diagram of a profiled sheet object.

Please refer to FIG. 1 to FIG. 3 together to disclose the configuration details of the first embodiment of the present invention, and to explain the negative pressure adsorber of the shaped sheet object of the present invention, which includes a device body 20, a gas-permeable membrane 30, and a diffusion plate 40. Wherein, at least one air chamber 21 is formed in the body 20, and at least one opening 22 communicating with the air chamber 21 is formed on the surface of the body 20. At least one inlet 23 communicating with the air chamber 21 is formed on the surface of the body 20. The total ventilation area of the opening 22 is larger than the total ventilation area of the inlet 23. The inlet 23 is connected to a A negative pressure source (not shown), which is formed by the driving operation of air extraction equipment such as an air compressor. The negative pressure source extracts the air in the air chamber 21 through the inlet 23 through the negative pressure pipe 60. The air chamber 21 is brought into a negative pressure state, and the device body 20 generates suction at the opening 22.

The ventilating film 30 is covered at the opening 22 of the device body 20. A plurality of ventilating holes 31 are formed in the venting film 30. The air chamber 21 in the device body 20 passes through the venting holes 31 and The outside is connected, and the layout area of the plurality of ventilation holes 21 is larger than the profile of the profiled sheet object 90, so that the negative pressure adsorber of the present invention can be completely attached to the profiled sheet object 90. In practice, the breathable film 30 may be made of a polymer (such as polymer plastic, polymer fiber, etc.), so that a plurality of breathable holes in the breathable film 30 are distributed in a cotton-gap shape, and The pores between the vent holes 31 are 10 μm to 30 μm. In addition, the shape of the holes of the plurality of breathable holes 31 is determined by the material selected for the breathable film 30 and is not limited to a circle or other shapes. For example, when polymer fibers are used to make the breathable film 30, The shape of the holes of the plurality of ventilation holes 31 may be staggered or filament-like staggered; for example, when the polymer film 30 is made of polymer plastic, the shape of the holes of the plurality of ventilation holes 31 may be nearly circular. Or other reticulated holes. On the other hand, the air-permeable membrane 30 can have good ventilation and smoothness, just like the filter cotton made of high-molecular polymers seen in the general market.

The diffusion plate 40 is interposed between the breathable film 30 and the opening 22. The diffusion plate 40 has a flat end surface 40 a. The breathable film 30 is arranged on the end surface. On 40a, the air-permeable membrane 30 can be kept flat. Further, a plurality of through holes 41 are formed on the end surface 40a of the diffusion plate 40. The air chamber 21 in the device body 20 communicates with the outside through the through holes 41 and the ventilation holes 31 in sequence. In practice, the plurality of through holes 41 are made by machining (such as boring or punching), so that the minimum value of the pores between the plurality of through holes 41 is 0.5 mm or more. Therefore, the plurality of ventilation holes 31 The number distributed in the unit area of the air-permeable membrane 30 is larger than the number distributed in the unit area of the plurality of through-holes 41 in the unit area of the diffusion plate 40, and the pores between the plurality of air-permeable holes 31 are smaller than the number Between the through holes 41.

In addition, in practice, the device body 20 can be connected to the claw head (not shown) of a multi-axis robotic arm through a connecting seat 70, and the negative pressure adsorber is provided with the driving of the multi-axis robotic arm. Multi-axial displacement capability.

Please refer to FIG. 4 and FIG. 5 together to disclose the configuration details of the second embodiment of the present invention. The difference from the first embodiment is that a ventilation is provided between the gas-permeable membrane 30 and the diffusion plate 40. A cushion 50, which is made of silicone or PU in practice. When the negative pressure adsorber holds the special-shaped sheet object 90 by the claw head on the multi-axis robotic arm, the negative pressure adsorber applies a thrust to the special-shaped sheet object 90, and the thrust can be absorbed by the air-permeable cushion 50 at this time. In this way, the air-permeable film 30 can more closely contact the shaped sheet object 90, thereby improving the firmness of the negative pressure adsorber in holding the shaped sheet object 90. Further, a plurality of perforations 51 are formed on the breathable cushion 50, and the plurality of perforations 51 communicate with the air chamber 21 through the plurality of through holes 41, and the plurality of perforations 51 are communicated through the air holes 21. The plurality of ventilation holes 31 communicate with the outside, so that the air chamber 21 in the device body 20 can communicate with the outside through the through holes 41, the perforations 51, and the ventilation holes 31 in this order. In specific implementation, the number of the plurality of ventilation holes 31 distributed in the unit area of the breathable film 30 is greater than the number of the plurality of perforations 51 distributed in the unit area of the breathable cushion 50, and the number of The pores of the ventilation holes 31 are smaller than the plurality of perforations 51. Furthermore, the number of the plurality of perforations 51 distributed under the unit area of the air-permeable cushion 50 may be divided from the number of the plurality of through holes 41 under the unit area of the diffusion plate 40. The number of cloths is the same, or may be less than the number of the plurality of through holes 41 distributed per unit area of the diffusion plate 40.

Please refer to FIG. 6 to disclose the configuration details of the third embodiment of the present invention. The difference from the first and second embodiments is that the device 20 is a desktop 80 configured on a workstation, and The opening 22 of the device body 20 faces upward. Compared with the negative pressure adsorbers of the first and second embodiments, it is used to move, assemble and pack the shaped sheet object 90. The negative pressure adsorber of this embodiment The special-shaped sheet object 90 is held in the work station to facilitate processing of the special-shaped sheet object 90.

Please refer to FIG. 7 and FIG. 8 together to disclose the configuration details of the fourth embodiment of the present invention. The difference from the first, second, and third embodiments is that when the plurality of ventilation holes When the area range and shape profile of 31 arranged on the breathable film 30 is larger than the profiled sheet object 90, a gas stop film 91 is pasted on the layout area of the plurality of ventilation holes 31, and the gas stop film 91 is based on the profiled sheet The contour of the object 90 surrounds the periphery of the shaped sheet object 90. More specifically, the air-permeable film 30 includes a ventilation hole 31a that is attached to the shaped sheet object 90 and a ventilation hole 31b that is not attached to the shaped sheet object 90. The air-impermeable film 91 is used to close the above-mentioned uncovered The ventilation holes 31b to the special-shaped sheet object 90 can prevent the above-mentioned vent holes 31b that are not attached to the special-shaped sheet object 90 from forming a "breaking vacuum" due to communication with the atmosphere, which can effectively improve the entire negative pressure adsorber to hold the special shape. The effect of a thin object at 90 o'clock. It must be noted that if the area range and shape profile of the plurality of ventilation holes 31 arranged on the gas-permeable membrane 30 are the same as those of the shaped sheet object 90, there is no need to configure the gas-stop membrane 91.

The above embodiments merely express the preferred embodiments of the present invention, but cannot be understood as limiting the scope of patents of the present invention. Therefore, the present invention shall be subject to the content of the claims defined in the scope of the patent application.

Claims (9)

A negative pressure adsorber for a special-shaped sheet object comprises: a device body having at least one air chamber formed therein; the surface of the device body being formed with at least one opening communicating with the air chamber and at least one inlet connected with a negative pressure source; the opening The total ventilation area is larger than the entrance; a breathable membrane is arranged on the opening, and a plurality of breathable holes are formed on the breathable membrane; a diffuser plate is interposed between the breathable membrane and the opening, and the diffuser plate A plurality of through-holes are formed on the upper side, and the air chamber communicates with the outside through the plurality of through-holes and the plurality of ventilation holes in sequence; wherein the plurality of ventilation holes are located under the unit area of the ventilation membrane. The number of distributions is greater than the number of distributions of the plurality of through-holes per unit area of the diffuser plate, and the pores of the plurality of ventilation holes are smaller than the plurality of through-holes; the layout area of the plurality of ventilation holes is larger than the irregular shape The shape profile of the thin sheet object, and an air-proof film is pasted on the layout area of the plurality of ventilation holes, and the air seal film surrounds the periphery of the special shape sheet object according to the shape contour of the special shape sheet object for closing Said multiple Among the pores of the negative cover is attached to the holes of the shaped sheet article. The negative pressure adsorber of the shaped sheet object according to claim 1, wherein the plurality of ventilation holes on the air-permeable membrane are distributed in a cotton gap shape. The negative pressure adsorber according to claim 2, wherein the gas-permeable membrane is made of a high molecular polymer. The negative pressure adsorber of the shaped sheet object according to claim 1, wherein the body is arranged on the claw head of a multi-axis robot arm. The negative pressure adsorber of the special-shaped sheet object according to claim 1, wherein the body is arranged on a desktop of a workstation. The negative pressure adsorber according to any one of claims 1 to 5, further comprising a breathable cushion interposed between the breathable film and the diffuser plate, and the breathable cushion is formed with a plurality of distributions. Perforations, the plurality of perforations communicate with the air chamber through the plurality of through holes, and the plurality of perforations communicate with the outside world through the plurality of ventilation holes; wherein the plurality of ventilation holes The number distributed in a unit area of the breathable membrane is larger than the number distributed in a unit area of the breathable cushion, and the pores of the plurality of vent holes are smaller than the plurality of perforations. The negative pressure adsorber according to claim 6, wherein the number of the plurality of perforations distributed per unit area of the breathable cushion and the number of the plurality of through holes distributed per unit area of the diffusion plate the same. The negative pressure adsorber according to claim 6, wherein the number of the plurality of perforations distributed per unit area of the breathable cushion is less than the number of the plurality of perforations distributed per unit area of the diffusion plate. . The negative pressure adsorber according to claim 6, wherein the breathable soft pad is made of one of silicone rubber and PU.