JP2001261174A - Sheet sucking method and sheet sucking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet sucking method and sheet sucking device capable of taking out stacked multifunctional films surely from the top one by one. SOLUTION: In this sheet sucking method for raising and lowering four vertical vacuum sucking pads A, B, C and D provided on an arm 21 and arranged on four sides to stacked sheets and successively sucking and carrying them from the top sheet one by one, the arm 21 is lowered to simultaneously suck the top sheet by the four pads A, B, C and D. After the sucking process, the four pads A, B, C and D are independently vertically moved to the arm 21 while raising the arm 21 so that the pads A, B, C and D adjacent at least in the edge directions are non-synchronous.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet sucking method and a sheet sucking method for sequentially sucking and conveying one sheet at a time from a top sheet to a stacked sheet of paper or film using a vacuum suction pad. It concerns the device.

[0002]

2. Description of the Related Art On a panel surface of a cathode ray tube, a so-called multifunctional film coated with a coating material having the above-mentioned properties is applied to reduce the reflectance, shield electromagnetic waves, and prevent contamination. Conventionally, this multifunctional film is stuck by using an automatic machine. In this type of automatic machine, first, one multifunctional film is taken out. The multifunctional film is stacked in a plural number and is accommodated in a film supply magazine having an upper opening. To take out the multifunctional film, from above the film supply magazine,
A plurality (in this conventional example, a pair) of vacuum suction pads are lowered to suction the upper surface of the uppermost multifunctional film. Then
The pair of vacuum suction pads are raised at the same time, and only the uppermost multifunctional film is taken apart from the other multifunctional films. In this way, the multifunctional films are sequentially taken out one by one from the top one and conveyed to the next step, for example, a film positioning mechanism.

[0003]

However, since the multifunctional film is coated with a plurality of coating materials, the front and back surfaces are extremely smooth, and the adhesion between the films is high. Therefore, when the ascending operation is performed by sucking the uppermost multifunctional film, another multifunctional film adheres to the lower surface of the uppermost multifunctional film, and at the same time, a plurality of sheets (for example, about 2 to 4 sheets) There is a problem that the multifunctional film is taken out of the film supply magazine. In such a case, a plurality of multifunctional films are set in the film positioning mechanism, so that positioning becomes impossible and the apparatus stops.

Further, the conventional vacuum suction pad has a structure in which the air volume is increased and a felt or the like is attached to the suction surface to control the suction force constant so as to control the suction force constant. . For this reason, when two to four multifunctional films were simultaneously adsorbed, the applied load increased with respect to the attraction force, and all the multifunctional films dropped. In order to solve such a problem, for example, after raising one of a pair of vacuum suction pads, the other is raised, and an attempt has been made to increase the separability by giving a two-dimensional deformation to the film. However, also in this case, sufficient deformation could not be given to the film, and reliable separation could not be performed.

The present invention has been made in view of the above circumstances, and provides a sheet suction method and a sheet suction apparatus which can reliably take out the best one from a laminated multifunctional film one by one. The purpose is to improve production efficiency.

[0006]

According to a first aspect of the present invention, there is provided a sheet adsorbing method according to the first aspect of the present invention, wherein four perpendicularly arranged four sides of an arm are provided on a laminated sheet. In a sheet suction method in which a vacuum suction pad is raised and lowered, and one sheet at a time is sequentially suctioned and conveyed from the uppermost sheet, the arm is lowered to simultaneously suction the uppermost sheet by the four vacuum suction pads. A step of, after the suction step, moving the four vacuum suction pads independently up and down with respect to the arm such that the vacuum suction pads adjacent at least in the side direction are asynchronous with each other while raising the arm. It is characterized by including.

In this sheet suction method, the vacuum suction pads adjacent to each other in the side direction are vertically moved with respect to the arm so as to be asynchronous, and the sucked sheet is twisted from a planar state to a non-planar state. Thus, when another sheet is in close contact with the lower surface of the uppermost sheet, the uppermost sheet is twisted, so that the other sheet is likely to be twisted accordingly. At this time, a reaction force against twisting occurs in the other sheets due to the rigidity of the sheets themselves. Due to this reaction force, the amount of twist of the other sheet is reduced. As a result, the curvature of the other sheet is larger than the curvature of the uppermost sheet (that is, the curvature of the sheet is closer to flat), and a gap is easily generated between the contact surfaces of both sheets. Accordingly, air flows in the meantime, and the other sheet is separated from the lower surface of the uppermost sheet.

According to a second aspect of the present invention, in the sheet suction apparatus, four vertical vacuum suction pads provided on an arm and arranged in four directions are raised and lowered with respect to the stacked sheets, and one by one from the uppermost sheet is sequentially turned on. An arm elevating means provided between a base frame of the apparatus and the arm for elevating the arm with respect to the sheet; and an arm and four vacuum suction pads. Pad lifting / lowering means provided between each of the vacuum suction pads and vertically moving the four vacuum suction pads independently with respect to an arm so that the vacuum suction pads adjacent at least in the side direction are asynchronous with each other. And

In this sheet suction apparatus, while the uppermost sheet sucked is lifted, the vacuum suction pads adjacent in the side direction are moved up and down at different timings, and the sheet between the vacuum suction pads is deformed by twisting. Further, each vacuum suction pad is vertically moved up and down independently by the pad lifting / lowering means, and various torsional deformations having different displacement amounts are generated in a plurality of portions of the sheet. As a result, a gap is easily generated between the uppermost sheet and another sheet that is in close contact with the lower surface of the uppermost sheet, and the other sheet is separated from the uppermost sheet.

According to a third aspect of the present invention, the sheet suction device is provided above and separated from the sheet, and is opposed to each other according to a pair of parallel sides of the sheet, and the distance between the leading ends is smaller than the distance between the leading ends. It is characterized by comprising a pair of abutting and peeling means set to be equal to the distance between the sides.

In this sheet suction apparatus, a pair of abutting and peeling means is provided above the sheet so as to be separated from each other, and the distance between the tips of the abutting and peeling means is set between the pair of sides of the sheet. When the uppermost sheet is lifted up and passes between a pair of abutting and peeling means, the other sheet which is displaced and adhered to the lower surface of the uppermost sheet is The sheet comes into contact with and is caught by the leading end of the contact and peeling means, and is forcibly peeled off from the lower surface of the uppermost sheet.

According to a fourth aspect of the present invention, there is provided a sheet suction device including at least one abutting / separating means which is provided above and spaced apart from the sheet, and whose leading end projects inward from the edge of the sheet. It is characterized by the following.

[0013] In this sheet suction apparatus, the contact and peeling means is provided above the sheet at a distance, and the leading end protrudes inward from the edge of the sheet. When passing through the contact peeling means, the peripheral edge of the uppermost sheet comes into contact with the leading end of the contact peeling means and is bent downward. As a result, the other sheets also tend to be bent accordingly. At this time, a reaction force against bending occurs in the other sheets due to the rigidity of the sheets themselves. Due to this reaction force, the bending amount of the other sheet is reduced.
As a result, the curvature of the other sheet is larger than the curvature of the uppermost sheet (that is, the curvature of the sheet is closer to flat), and a gap is easily generated between the contact surfaces of both sheets. Accordingly, air flows in the meantime, and the other sheet is separated from the lower surface of the uppermost sheet.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a sheet suction method and a sheet suction apparatus according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a sheet suction device,
2 is a view taken in the direction of arrows aa in FIG. 1, FIG. 3 is a view taken in the direction of arrows bb in FIG. 1, FIG. 4 is a sectional view of the multifunctional film, and FIG. FIG. 6 is a plan view seen from the bb direction, FIG. 6 is an explanatory view showing the positional relationship between the multifunctional film and the contact peeling means in the sheet suction device of FIG. 1, and FIG. 7 is the contact peeling means shown in FIG. It is a principal part enlarged view explaining the effect | action of.

A base side plate 5 which is long in the horizontal direction is fixed to the base frame 3 of the sheet suction device 1. A pair of upper and lower rails 7, which are long in the horizontal direction, are fixed to the side surface of the base side plate 5. A horizontally moving frame 11 is attached to the rails 7 via a slider 9 so as to be horizontally movable.

The cylinder body 13a of the cylinder 13 for horizontal movement is fixed to the horizontal movement frame 11. The drive shaft 13b of the horizontal movement cylinder 13 is
Fixed to 1. Therefore, the horizontal movement cylinder 13
Is driven, the drive shaft 13b expands and contracts, and the horizontal moving frame 11 is arranged at an arbitrary position in the horizontal direction along the rails 7, 7.

A pair of parallel long rails 15 are fixed to the horizontal moving frame 11 in the vertical direction. The rails 15, 15 are provided with arms 21 via sliders 19.
Is movably mounted. Horizontal moving frame 1
The elevator motor 23 is fixed to 1. The elevating motor 23 drives the arm 21 up and down by driving a linear drive mechanism (not shown) such as a ball screw or a pinion and a rack. These rails 15, 15, the slider 19, the elevating motor 23, and the linear drive mechanism constitute an arm elevating means.

The arm 21 includes a horizontal arm 21a which is long in the horizontal direction, and a pair of parallel support arms 21 provided at both ends in the longitudinal direction of the horizontal arm 21a in orthogonal directions.
b and 21b. Each support arm 21
Pad up / down cylinders 25 serving as pad lifting / lowering means are provided at both ends of b and 21b. That is, four pad up / down cylinders 25 are provided. The pad up / down cylinder 25 is fixed so that the axis is in the up / down direction, and a drive shaft (not shown) is extended / contracted in the up / down direction.

The drive shaft of the pad vertical cylinder 25 includes:
Vacuum suction pads A, B, C and D are fixed. That is, the vacuum suction pads A, B, C, and D are arranged on four sides near the four inner corners of the multifunctional film 27, as shown in FIG. The pad up-and-down cylinder 25 can vertically move the vacuum suction pads A, B, C, and D independently with respect to the arm 21 by expanding and contracting the drive shaft.

The pad up-and-down cylinder 25 is controlled by a control device (microcomputer or the like) (not shown), and the vacuum suction pads A, B, C and D adjacent in the side direction.
Are independently driven and controlled to be asynchronous. Here, the side direction means, for example, in the case of the vacuum suction pad A, the vacuum suction pads B and C. Vacuum suction pad A
On the other hand, the vacuum suction pad D is in a diagonal direction. The vacuum suction pads A and D in the diagonal directions do not necessarily have to be asynchronous. That is, it may be synchronous, but it is better if it is asynchronous.

The support 31 is provided on the base 31 of the sheet suction device 1.
3 is erected, and a multifunctional film 2 is
A sheet supply magazine 35 having an upper opening for accommodating the sheet 7 is attached. The sheet supply magazine 35 accommodates, for example, about 50 multifunctional films 27. The arm 21 can be moved and arranged above the sheet supply magazine 35.

The multifunctional film 27 accommodated in the sheet supply magazine 35 is coated with coating materials having respective characteristics in order to reduce the reflectance of the cathode ray tube with respect to the panel surface, shield electromagnetic waves, and prevent contamination. I have. As shown in FIG. 4, for example, as shown in FIG. 4, a multifunctional film 27 is formed on an upper surface of a carrier 27a made of AR (acryl), PET (polyethylene terephthalate), or the like.
b is formed. On the other hand, an adhesive layer 27c and a release paper 27d are adhered to the lower surface of the carrier 27a. The thickness of each layer is
The carrier 27a is 188 μm, the coating layer 27b is 14 μm,
The adhesive layer 27c is formed to have a thickness of about 25 μm, and the release paper 27d is formed to be about 75 μm. The thickness of the entire multifunctional film 27 is about 300 μm.

On both side surfaces of the sheet supply magazine 35, a pair of contact and peeling means (hereinafter, referred to as rack-shaped blocks) 3
7 are provided. The rack-shaped block 37 has a plurality of rack-shaped teeth 37a formed in the vertical direction. The rack-shaped blocks 37 according to this embodiment are arranged to face each other along a pair of parallel sides 28 of the multifunctional film 27, and the distance between the tips of the teeth 37a is set to the side of the multifunctional film 27. The distance is set to be equal to the distance between 28.

Therefore, the multifunctional film 27 sucked and lifted by the vacuum suction pads A, B, C, and D will not be lifted if one side 28 does not contact one rack-shaped block 37. 28 is also the other rack-shaped block 37
Not to abut.

It is preferable that the rack-shaped block 37 has a structure movable in the horizontal direction in order to facilitate insertion of the multifunctional film 27 from the upper opening of the film supply magazine. With such a configuration, when the multifunctional film 27 is inserted, the rack-shaped block 37 is horizontally moved and retracted, thereby facilitating the insertion.

The sheet suction device 1 configured as described above
A method for adsorbing a sheet using the method will be described. To adsorb the multifunctional film 27, first, the cylinder 13 for horizontal movement is used.
To move the horizontal moving frame 11 to the position of the sheet supply magazine 35. Thereby, the arm 21
Is disposed above the multifunctional film 27 stored in the sheet supply magazine 35.

Next, the elevator motor 23 is driven,
The arm 21 is lowered. When the arm 21 is lowered, the vacuum suction pads A, B, C, and D become the best multifunctional films 2.
7, the vacuum suction device (not shown) applies a negative pressure to simultaneously suction the four vacuum suction pads A, B, C, and D onto the multifunctional film 27.

Next, the lifting motor 23 is driven to raise the arm 21 upward. As a result, the uppermost multifunctional film 27 rises while being sucked by the vacuum suction pads A, B, C, and D. At this time, arm 2
With the rise of 1, the pad up / down cylinder 25 is driven, and the vacuum suction pads A, B, C, and D are armed such that the vacuum suction pads A, B, C, and D adjacent in the side direction are asynchronous with each other. Is moved up and down. Therefore, the sucked multifunctional film 27 is twisted from the flat state to the non-flat state.

Accordingly, when another multifunctional film 27 is in close contact with the lower surface of the uppermost multifunctional film 27,
When the uppermost multifunctional film 27 is twisted, the other multifunctional films 27 tend to be twisted accordingly. At this time, the other multifunctional film 27 generates a reaction force against twisting due to the rigidity of the sheet itself. The amount of twist of the other multifunctional film 27 is reduced by this reaction force.
As a result, the curvature of the other multifunctional film 27 becomes larger than the curvature of the uppermost multifunctional film 27 (that is, it becomes almost flat), and a gap is easily generated between the contact surfaces of the two. Accordingly, air flows in the meantime, and the other multifunctional film 27 is separated from the lower surface of the uppermost multifunctional film 27.

If the contact cannot be separated, if the uppermost multifunctional film 27 is lifted while the other multifunctional film 27 is in close contact with the lower surface, the pair of rack-shaped blocks 37 When passing through the space, the other multifunctional film 27 which is shifted and adheres to the lower surface of the uppermost multifunctional film 27 is, as shown in FIG.
7, and is forcibly peeled off from the lower surface of the uppermost multifunctional film 27.

As a result, the other multifunctional films 27 can be reliably separated from the lower surface of the uppermost multifunctional film 27, and the multifunctional films 27 can be reliably attracted one by one.

As described above, according to the sheet sucking method using the sheet sucking apparatus 1, the multifunctional films 27 having high adhesion can be reliably sucked and conveyed one by one. It is possible to prevent the apparatus from being stopped due to the double feeding, and to improve the productivity of the multifunctional film attaching operation.

Next, another embodiment of the sheet suction apparatus according to the present invention will be described with reference to FIGS. FIG. 8 is an explanatory view showing the positional relationship between the multifunctional film and the contact / separation means in the sheet suction device of another embodiment, and FIG. 9 is a main part for explaining the operation of the contact / peeling means shown in FIG. It is an enlarged view.

The sheet suction device according to this embodiment is
The rack-shaped block 41 is different from the rack-shaped block 37. That is, the rack-shaped block 41
Are provided above and spaced apart from the multifunctional film 27, and the tips of the teeth 41 a protrude inward from the edges of the multifunctional film 27. At least one rack-shaped block 41 may be provided, and more preferably, a plurality of rack-shaped blocks 41 are provided corresponding to other side portions. Other configurations are the same as those of the above-described sheet suction device 1.

According to the sheet suction apparatus of this embodiment, since the tip of the tooth portion 41a protrudes inward from the edge of the multifunctional film 27, the uppermost multifunctional film 27 is raised. When passing through the rack-shaped block 41, the peripheral edge of the uppermost multifunctional film 27 comes into contact with the teeth 41a of the rack-shaped block 41 and is bent downward. Thus, the other multifunctional film 27 is also bent along with this. At this time, the other multifunctional film 27 generates a reaction force against bending due to the rigidity of the film itself. Due to this reaction force, the other multifunctional film 27
Becomes smaller. As a result, the curvature of the other multi-functional film 27 becomes larger than the curvature of the uppermost multi-functional film 27 (that is, becomes closer to flat), and a gap is likely to be formed between the contact surfaces of the two and the air therebetween. Flows in, and the other multifunctional film 27 is the best multifunctional film 2
7 will be separated from the lower surface.

In each of the above embodiments, the case where the sheet is a multifunctional film has been described as an example. However, the sheet sucking method and the sheet sucking apparatus according to the present invention use paper, glass, Even with a metal or the like, the same operation and effect as described above can be obtained.

[0037]

As described above in detail, in the sheet suction method according to the present invention, after the uppermost sheet is simultaneously suctioned by the four vacuum suction pads, at least the adjacent vacuum suction in the side direction is performed while raising the arm. Since the four vacuum suction pads are moved up and down with respect to the arm so that the pads are asynchronous, the sucked sheet is twisted from a planar state to a non-planar state. Accordingly, when another sheet is in close contact with the lower surface of the uppermost sheet, a gap is likely to be formed between the contact surfaces of the two sheets, and air flows in the meantime, and the other sheet becomes the uppermost sheet. It will be separated from the lower surface of the sheet. As a result, a plurality of sheets are not transported at the same time, and only the uppermost sheet can be reliably transported by suction.

In the sheet suction apparatus according to the present invention, the arm elevating means for raising and lowering the sheet and the four vacuum suction pads are vertically moved with respect to the arm so that the vacuum suction pads adjacent in the side direction are asynchronous with each other. Since the device has a pad elevating means for raising and lowering the adsorbed uppermost sheet, the vacuum suction pads adjacent in the side direction are moved up and down at different timings to deform the sheet between the vacuum suction pads by twisting. Can be. Further, since each vacuum suction pad is independently moved up and down by the pad lifting / lowering means, various torsional deformations having different displacement amounts can be generated at a plurality of portions of the sheet. As a result, a gap is created between the uppermost sheet and another sheet that is in close contact with the lower surface of the uppermost sheet, and the other sheet can be separated from the uppermost sheet.

[Brief description of the drawings]

FIG. 1 is a front view of a sheet suction device according to the present invention.

FIG. 2 is a view as viewed in the direction of arrows aa in FIG. 1;

FIG. 3 is a view taken in the direction of arrows bb in FIG. 1;

FIG. 4 is a sectional view of a multifunctional film.

FIG. 5 is a plan view of the arrangement of the vacuum suction pads viewed from the direction of arrows bb in FIG. 1;

FIG. 6 is an explanatory diagram showing a positional relationship between a multifunctional film and a contact peeling means in the sheet suction device of FIG. 1;

FIG. 7 is an enlarged view of a main part for explaining the operation of the contact stripping means shown in FIG. 6;

FIG. 8 is an explanatory diagram showing a positional relationship between a multifunctional film and a contact and peeling means in a sheet suction device of another embodiment.

FIG. 9 is an enlarged view of a main part for explaining the operation of the contact stripping means shown in FIG. 8;

[Description of Signs] 1 ... Sheet suction device, 3 ... Base frame, 15 ... Rail (arm elevating means), 19 ... Slider (Arm elevating means), 21 ... Arm, 23 ... Elevating motor (Arm elevating means) , 25: Pad vertical cylinder (pad lifting / lowering means), 27: Sheet, 28: Side, 37, 41: Contact / peeling means, A, B, C, D: Vacuum suction pad

Claims (4)

[Claims] 1. A vertically conveyed four vacuum suction pads provided on an arm are moved up and down with respect to a stacked sheet, and sheets are sequentially sucked and conveyed one by one from the uppermost sheet. In the suction method, a step of lowering the arm to simultaneously suction the uppermost sheet with the four vacuum suction pads; and, after the suction step, the vacuum suction pads adjacent at least in the side direction while raising the arm. Moving the four vacuum suction pads up and down independently with respect to an arm so that the vacuum suction pads are asynchronous with each other. 2. A vertically conveyed four vacuum suction pads provided on an arm of a stacked sheet are moved up and down, and sheets are sequentially suctioned and conveyed one by one from the uppermost sheet. In the suction device, an arm raising / lowering means provided between a base frame of the device and the arm to raise and lower the arm with respect to the sheet; and at least provided between the arm and each of the four vacuum suction pads. A sheet suction device comprising: pad lifting means for vertically moving four vacuum suction pads independently of an arm so that the vacuum suction pads adjacent in the side direction are asynchronous with each other. 3. A sheet provided above and separated from the sheet and opposed to each other according to a pair of parallel sides of the sheet, and a distance between the leading ends is equal to a distance between the sides. 3. The sheet suction device according to claim 2, further comprising a pair of abutting and separating means set to be equal. 4. It is provided above and separated from the sheet,
3. The sheet suction apparatus according to claim 2, further comprising at least one abutting / separating means having a leading end projecting inward of the sheet from an edge of the sheet.