JP2001287868A - Sheet peeling device and plate member feeding system using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet peeling device facilitating the peeling of the protective sheet of an optical sheet. SOLUTION: This device for peeling protective sheets 12 and 12 stuck to both sides of a plate member 10 comprises a stage 18 for placing the plate member 10 and an adhesive tape 34. One end of the adhesive tape 34 is retained, at least the other end of the tape 34 is stuck to the protective sheet 12 of the plate member 10 placed on the stage 18, and the one end of the tape 34 is pulled, whereby the protective sheet 12 is peeled from the plate member 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a sheet peeling device such as a protective sheet for a plate member used in a flat display device such as a liquid crystal display device, and a plate member supply system using the same.

[0002]

2. Description of the Related Art A backlight used in a liquid crystal display device is composed of members based on a plastic frame, a lamp, a light guide plate, and an optical sheet. To manufacture backlights.

Conventionally, when assembling a backlight, an operator prepares these members, performs dust removal work, and assembles them.

[0004] Incidentally, the optical sheet is composed of a reflection sheet, a light-collecting sheet and a diffusion sheet, and some of these optical sheets are provided with a protection sheet on both sides to protect the surface. In addition, these optical sheets require an operation of peeling off the protective sheet before assembling.

Conventionally, the work of peeling off the protective sheet has been performed one by one by an operator. Therefore, there is a possibility that the worker touches the optical sheet from which the protective sheet has been peeled off and damages the surface.

[0006]

As described above, in assembling the backlight, it is necessary to prepare each member, perform dust removal work, and peel off the protective sheet of the optical sheet. Therefore, there is a problem that the optical sheet is damaged or the order of assembling is wrong.

Further, dust is generated due to human intervention in the work,
There is a problem that dust is collected and dust enters the backlight.

In view of the above problems, the present invention provides a sheet peeling apparatus capable of easily peeling off a protective sheet or the like of an optical sheet and a plate member supply system using the same.

[0009]

According to a first aspect of the present invention, there is provided a sheet peeling apparatus for peeling off a sheet stuck on at least one surface of a plate member, comprising: a stage on which the plate member is placed;
While holding one end of the adhesive tape, affixing at least the other end of the tape to a sheet of the plate member placed on the stage, and relatively pulling one end of the tape, from the plate member And a peeling means for peeling the sheet.

According to a second aspect of the present invention, in the sheet peeling apparatus according to the first aspect, the peeling means peels the sheet from the plate member by moving and pulling one end of the tape. is there.

The invention according to claim 3 is characterized in that the peeling means peels off the sheet from the plate member by fixing one end of the tape and moving the plate member with respect to the tape. The sheet peeling device according to claim 1.

According to a fourth aspect of the present invention, the peeling means comprises: holding means for holding one end of the tape from the roll-shaped tape around which the tape is wound and drawing the tape by a predetermined length; Cutting means for cutting the cut tape, pressing means for pressing the adhesive surface at the other end of the tape against the sheet after being cut by the cutting means, and moving the holding means to move one end of the tape. Moving means for pulling the sheet from the plate member by pulling the sheet member.
It is a sheet peeling apparatus of a statement.

The invention according to claim 5 is the sheet peeling apparatus according to claim 4, wherein the holding means has a chuck for sandwiching the tape in a width direction.

According to a sixth aspect of the present invention, the peeling means presses the peeled sheet forward in a state where the holding means pulls one end of the tape to peel off a part of the sheet from the plate member. 3. The sheet peeling device according to claim 2, further comprising a separating unit that further separates the sheet by performing the separation.

The invention according to claim 7 is the sheet peeling device according to claim 2, wherein the tape is attached to a corner of the plate member.

According to the invention of claim 8, the sheet is stuck on both sides of the plate member, and when the first tape and the second tape are stuck on both surfaces, respectively, Paste the first tape on one side,
The sheet peeling device according to claim 2, wherein the second tape is attached to the other surface of the corner so as to be substantially orthogonal to the first tape.

According to a ninth aspect of the present invention, there is provided a sheet peeling device for peeling a sheet stuck on at least one surface of a plate member, and a dust removing device for removing dust from the plate member from which the sheet has been peeled. This is a plate member supply system.

According to a tenth aspect of the present invention, there is provided the plate member supplying apparatus according to the ninth aspect, further comprising a conveying device for conveying the plate member from which the sheet has been peeled by the sheet peeling device to the dust removing device. System.

According to the sheet peeling apparatus of the present invention, the peeling means holds one end of the adhesive tape and at least the other end of the tape is a sheet of a plate member placed on the stage. To peel off the sheet from the plate member by relatively pulling one end of the tape,
The sheet can be automatically peeled off from the plate member without manual intervention.

According to a fourth aspect of the present invention, the holding means holds one end of the tape from the roll-shaped tape and pulls out the tape for a predetermined length, the cutting means cuts the pulled-out tape, and the pressing means cuts the tape. The pressure-sensitive adhesive surface at the other end is pressed against the sheet, and the moving means pulls one end of the tape by moving the holding means to peel the sheet from the plate member.

The holding means of the present invention has the chuck for holding the tape in the width direction, so that the tape can be reliably held.

The peeling means in the sheet peeling device of the present invention has a separating means. Then, in a state in which the holding unit pulls one end of the tape and peels a part of the sheet from the plate member, the separating unit presses the peeled sheet forward to further peel the sheet from the plate member. Can be.

According to the sheet peeling device of the present invention, since the tape is attached to the corner of the plate member, the sheet can be reliably peeled by pulling the tape.

According to the sheet peeling apparatus of the eighth aspect, the first tape is attached to one side of one corner of the plate member, and the second tape is attached to the other side so as to be substantially orthogonal to the first tape. The sheets on both sides of the plate member can be peeled off without sticking the adhesive surfaces of the first tape and the second tape to each other.

In the plate member supply system according to claim 9,
Since the sheet adhered to the plate member is peeled off by the sheet peeling device and dust is removed from the plate member by the dust removing device, the plate member can be easily supplied.

According to the plate member supply system of the tenth aspect, the plate member can be supplied without using any manual operation by using the transfer device.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <1> Configuration of Supply System 1 Hereinafter, a supply system 1 of an optical sheet for a backlight used in a liquid crystal display device according to an embodiment of the present invention will be described with reference to FIG. Will be explained.

FIG. 17 is a block diagram of the supply system 1. In FIG.
The transport device 3, the sheet peeling device 4, the transport device 5, and the dust removing device 6.

The member supply device 2 is a device for supplying a light guide plate and an optical sheet used for a backlight in an assembling order, and is stocked in a storage box for each type of member and supplies those members in an assembling order. Things.

In the transport device 3, a pickup head having a vacuum device transports a member from the member supply device 2 to the entrance of the sheet peeling device 4. In addition,
A member that does not need to peel the protective sheet, which will be described later, is transported to the dust removing device 6 beyond the sheet peeling device 4.

The sheet peeling device 4 is a device for automatically peeling off the protective sheets stuck on both sides of the optical sheet, the details of which will be described later.

The transport device 5 is also composed of a pickup head having a vacuum device, and transports the optical sheet or the like from which the protective sheet has been peeled off by the sheet peeling device 4 to the dust removing device 6.

The dust removing device 6 is for simultaneously cleaning both sides of a plate member such as an optical sheet with a plurality of adhesive rollers. The adhesive roller is formed of synthetic rubber containing butyl rubber as a main component, and removes dust adhering to the surface by bringing the adhesive roller into close contact with both sides of the optical sheet.

The optical sheet from which the protective sheet has been peeled off and the dust removed has been taken out by the operator 8 as shown in FIG.

According to the supply system 1, the worker does not need to perform the work of preparing the light guide plate and the optical sheet, the work of removing the protective sheet, and the work of removing dust in the assembling work, thereby improving the productivity.

Further, since the members are supplied to the worker 8 in the order of assembly, it is possible to prevent the wrong order of assembly due to the mistake of the worker 8.

Further, the number of operations involving humans is reduced, so that the possibility of dust generation due to dust generation and dust collection is reduced.

If it is necessary to further remove dust, two dust removing devices 6 can be arranged in series as shown in FIG. As shown in FIG. 19, the sheet peeling device 4 can be omitted.

<2> Sheet Peeling Device 4 Next, the structure of the sheet peeling device 4 used in the supply system 1 described above will be described with reference to FIGS. In this description, an optical sheet or a light guide plate made of a reflection sheet, a light-collecting sheet, and a diffusion sheet is collectively referred to as a plate member 10, and protective sheets 12, 12 are attached to the front and back surfaces of the plate member 10. Shall be.

(Overall Configuration of Sheet Peeling Apparatus 4) FIG.
3 is a perspective view of the sheet peeling device 4. FIG.

The sheet peeling device 4 has a pair of stage rails 16 arranged on the pedestal 14 in the front-rear direction, on which a stage 18 can be moved in the front-rear direction by an air cylinder (not shown). .

The plate member 10 is placed on the stage 18. As shown in FIG. 1, the mounting position of the plate member 10 is such that the corner of the rectangular plate member 10 is forward, that is, the plate member 10 is placed in a diamond shape with respect to the stage 18. And, for this positioning, three protrusions 2
0, 20, and 20 are arranged. Note that the plate member 10 is placed on the stage 18 by the above-described transfer device 3.

An upper pedestal 22 is provided at the rear of the stage rail 16 at a height at which the stage 18 can be inserted. That is, the plate member 10 placed on the stage 18 moves between the pedestal 14 and the upper pedestal 22.

The pedestal 14 is located behind the upper pedestal 22.
A pair of guide rails 26, 26 for moving a separation guide 24, which will be described later, is provided on both sides of the guide rail. An opening 28 is provided in the pedestal 14 located between the guide rails 26, 26 so that the plate member 10 falls.

On the upper surface of the upper pedestal 22, a peeling device 30 for peeling the protective sheet 12 from the surface of the plate member 10 is mounted. On the lower surface of the pedestal 14, the protective sheet 12 is peeled from the back surface of the plate member 10. A peeling device 30 for peeling is mounted.

(Peeling Apparatus 30) Next, the peeling apparatus 30 will be described. The upper and lower peeling devices 30 have the same configuration.

In the peeling device 30, a roll-shaped tape 36 in which an adhesive tape 34 is wound around the front end of a base 32 is rotatably arranged, and the tape 34 can be pulled out.

A U-shaped tape receiving base 44 is provided on the upper surface of the base 32 on the opposite side of the roll-shaped tape 36.

Outside the tape receiving base 44, a tape cutting device 46 described later is provided.

A robot 38 that can move only in one axial direction along the base 32 is provided. The robot 38 moves the slider 40 in a uniaxial direction. The uniaxial direction extends in a direction along the side of the plate member 10, that is, in a direction crossing the base 40 at an angle of 45 °. ing. Hereinafter, this direction is referred to as an X-axis direction. A pulse motor is built in the robot 38 to move the slider 40 to a predetermined position.

The slider 40 is provided with a pressing member 42 that can move in the vertical direction (hereinafter, referred to as the Z-axis direction). The pressing member 42 has a motor inside and is movable in the Z-axis direction with respect to the slider 40. A pulse motor is also built in the pressing member 42, and the pressing member 4
Move 2

The pressing member 42 moves from the position of the tape receiving base 44 to a position further outward as the slider 40 moves.

The bottom surface 43 of the pressing member 42 is formed flat so that the tape 34 can be pressed.

At the front of the pressing member 42, a cylindrical vacuum device 48 for sucking the tape 34 is arranged. When the tape 34 is sucked, the vacuum device 48 moves downward and the tape 34 Aspirate the non-adhesive surface opposite the adhesive surface.

The tape 3 is provided at the rear of the pressing member 42.
4 is provided with a holding device 50 for holding 4 in the width direction.

(Holding Device 50) The structure of the holding device 50 will be described with reference to FIGS.

The holding device 50 includes a pair of chucks 52, 52.
The lower end faces of the chucks 52, 52 facing each other form a slope as shown in FIGS.

The tape 3 is placed between the pair of chucks 52, 52.
When the position 4 is located (see FIG. 9), the chucks 52, 52 close (see FIG. 10), and the pair of chucks 52, 52 grip the non-adhesive surface of the tape 34 to catch the tape 34 (see FIG. 11).

FIG. 12 shows a state in which the tape 34 is caught by the pair of chucks 52, 52. When the tape 34 is held in this manner, the pair of chucks 52, 52 grip only the non-adhesive surfaces. When the chucks 52 are separated, the tape 34 is easily separated from the chucks 52.

(Cutting Apparatus 46) Next, the structure of the cutting apparatus 46 will be described with reference to FIGS.

The cutting device 46 is movable by an air cylinder 54. The air cylinder 54 projects only when the tape 34 is to be cut, and moves from the retracted position to the cutting position of the tape 34.

The cutting device 46 cuts the tape 34 with the same configuration as the scissors. The lower tooth 56 is provided with a rotatable upper tooth 58, and the upper tooth 58 is connected to the air cylinder 60.
The tape 34 is cut by rotating the tape 34.

FIG. 13 shows a state in which the cutting device 46 is in the retracted position.

FIG. 14 shows a state in which the cutting device 46 has been moved from the retracted position to the cutting position by the air cylinder 54.

FIG. 15 shows a state in which the upper teeth 58 are rotated by the air cylinder 60 to cut the tape 34.

After the cutting in this manner, FIG.
The cutting device 46 is retracted again by the air cylinder 60 to the retracted position as shown in FIG.

(Operating state of peeling device 30) Next, FIGS.
The operation state of the peeling device 30 will be described with reference to FIG.

(First Step) As shown in FIG. 2, one end of the tape 34 pulled out from the roll-shaped tape 36 and pulled out through the tape receiving base 44 for a predetermined length is held in the holding device as described above. Hold at 50.

Then, the slider 40 is moved slightly upward, the adhesive surface of the tape 34 is peeled off from the tape receiving base 44, and then the slider 40 is moved in the X-axis direction.

(Second Step) As shown in FIG. 3, the pressing member 42 moves in the X-axis direction by the movement of the slider 40,
Next, the pressing member 42 is moved downward, and the adhesive surface of the tape 34 is attached to the tape receiving base 44 again. Then, the vacuum device 48 is moved downward from this state, and the non-adhesive surface of the tape 34 is sucked.

As a result, the tape 34 is
0, it is arranged substantially horizontally by being sucked by the flat bottom surface 43 of the pressing member 42 and the vacuum device 48.

Then, as described above, the tape 34 is cut by moving the cutting device 46 from the retreat position to the cutting position.

(Third Step) FIGS. 4 and 6 show the state of the third step.

The stage 18 is moved forward, and the plate member 1 is moved.
The corner of 0 protrudes from between the pedestal 14 and the upper pedestal 22.

By moving the pressing member 42 downward, the adhesive surface of the tape 34 is pressed against the protective sheet 12 on the surface of the plate member 10 by the flat bottom surface 43 of the pressing member 42. In this case, the other end of the tape 34 is also pressed by the vacuum device 48. However, one end of the holding device 50 sandwiched between the chucks 52, 52 is projected outward from the plate member 10.

Similarly, the pressing member 42 of the lower peeling device 30 applies the tape 3 to the protective sheet 12 on the back surface of the plate member 10.
Press 4.

Here, the position where the tape 34 on the front surface and the tape 34 on the back surface are adhered to the protective sheets 12 will be described with reference to FIG.

As shown in FIG. 16, a tape 34 is attached along the corners of the surface of the plate member 10 protruding from the pedestal 14 and the upper pedestal 22. Similarly, the tape 34 to be attached to the back surface of the plate member 10
Paste along the side of the 0 corner.

However, the upper surface tape 34 and the lower surface tape 3
4 is attached so as to be substantially orthogonal as shown in FIG. By sticking in this manner, the adhesive surfaces of the upper tape 34 and the lower tape 34 are not adhered to each other. The reason why the tape 34 is attached to the corners of the plate member 10 is that the protective sheet 12 has the weakest adhesive strength at the corners.

Accordingly, the upper peeling device 30 and the lower peeling device 30 are substantially perpendicular to each other, that is, the X axis of the upper peeling device 30 and the X axis of the lower peeling device 30 are substantially perpendicular to each other. To place.

(Fourth Step) FIGS. 5 and 7 show the state of the fourth step.

After the tapes 34, 34 are attached to both sides of the corners of the plate member 10 as described above, the pressing member 42 disposed above is moved upward. As a result, one end of the tape 34 is pulled, and the protective sheet 12 to which the tape 34 is attached is peeled off from the surface of the plate member 10. The protective sheet 12 is also peeled off from the plate member 10 in the same manner for the tape 34 attached to the lower surface.

(Fifth Step) The fifth and subsequent steps will be described with reference to FIG.

With the part of the protection sheet 12 peeled off from the plate member 10 as described above, the separation guide 24 is moved forward along the guide rail 26.

The separation guide 24 includes an upper pressing plate 62 disposed in a horizontal direction, a lower pressing plate 64 disposed below the upper pressing plate 62, and a pair of side plates 6 for fixing the upper pressing plate 62 and the lower pressing plate 64.
6, 68 when viewed from the front.

Then, the separation guide 24 is connected to the guide rail 2
6 and 26, the upper pressing plate 62 presses the peeled protective sheet 12 forward, and the lower pressing plate 64 also presses the lower protective sheet 12 forward.

Then, while the plate member 10 is being pushed out of the stage 18, the pair of protection sheets 12 is also pulled forward, so that the protection sheets 12 are gradually peeled off from both sides of the plate member 16, and the separation guide 24 is guided by the guide rail. At the rear end position of 26, all the protective sheets 12,
12 is peeled from the plate member 10.

Then, the protective sheets 12, 12
The plate member 10 from which is peeled falls from the opening 28 and is placed on a tray (not shown) disposed below the opening.

(Effects of the Embodiment) With the above peeling device 4, the protective sheets 12 provided on both sides of the plate member 10,
12 can be automatically peeled off without human intervention.

In the above configuration, the peeling devices 30 are provided at the upper part of the upper pedestal 22 and at the lower part of the pedestal 14 in order to peel the protective sheets 12 on both sides of the plate member 10. When the protective sheet 12 has been peeled off, the peeling device 30 may be provided only on the upper pedestal 22.

(Modification) In the above embodiment, the holding device 50
While holding one end of the tape 34, the protective sheets 12, 12 were moved and peeled from the plate member 10, but instead, the one end of the tape 34 was fixed, and the plate member 10 was moved in the direction in which the tape 34 was pulled. The protective sheets 12, 12 may be peeled from the plate member 10 by moving.

[0092]

As described above, according to the sheet peeling apparatus of the present invention, the sheet stuck on at least one side of the plate member can be peeled off without manual operation.

Further, according to the plate member supply system, the necessary plate member can be supplied after the protective sheet is peeled off and the dust is removed without the intervention of human hands.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sheet peeling device showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram of a first step of the sheet peeling device.

FIG. 3 is an explanatory view of a second step in the same manner.

FIG. 4 is an explanatory view of a third step.

FIG. 5 is an explanatory view of a fourth step.

FIG. 6 is an explanatory diagram of a third step enlarged in the same manner.

FIG. 7 is an explanatory diagram of a fourth step which is also enlarged.

FIG. 8 is an explanatory diagram of a fifth step enlarged in the same manner.

9A and 9B are explanatory diagrams of the chuck before holding the tape, wherein FIG. 9A is a front view and FIG. 9B is a side view.

FIGS. 10A and 10B are explanatory views immediately before the chuck holds the tape, wherein FIG. 10A is a front view and FIG. 10B is a side view.

FIGS. 11A and 11B are explanatory diagrams of a state in which the chuck holds the tape, wherein FIG. 11A is a front view and FIG. 11B is a side view.

FIG. 12 is a perspective view of a state where the chuck holds the tape.

FIG. 13 is a front view of the cutting device in a retracted position.

FIG. 14 is a front view of the cutting device moved to a cutting position.

FIG. 15 is a front view of the cutting device in a state where the tape is cut.

FIG. 16 is a plan view showing a state where a tape is attached to a corner of a plate member.

FIG. 17 is a block diagram of a supply system according to the present embodiment.

FIG. 18 is a block diagram of a supply system according to another embodiment.

FIG. 19 is a block diagram of a supply system according to still another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 supply system 2 member supply device 3 transport device 4 sheet peeling device 5 transport device 6 dust removing device 10 plate member 12 protective sheet 18 stage 24 separation guide 30 peeling device 34 tape 36 roll-shaped tape 42 pressing member 44 tape holder 46 cutting device 48 Vacuum device 50 Protective device 52 Chuck

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takao Hotta 50, Kamiyube, Yobe-ku, Himeji-shi, Hyogo Pref. Toshiba Electronics Engineering Co., Ltd. (72) Inventor Takuya Hirose 7-1 Nisshincho, Kawasaki-ku, Kawasaki-shi, Kanagawa F-term (reference) 2H042 BA01 BA20 DA16 DE04 2H091 FA14Z FA32X FC29 FD14 GA16 LA12 3F108 JA05

Claims (10)

[Claims] 1. A sheet peeling apparatus for peeling a sheet stuck on at least one surface of a plate member, comprising: a stage on which the plate member is mounted; and one end of an adhesive tape, and at least one of the tapes. Affixing the other end to the sheet of the plate member placed on the stage, and relatively pulling one end of the tape, thereby separating the sheet from the plate member. Sheet peeling device. 2. A sheet peeling apparatus according to claim 1, wherein said peeling means peels off said sheet from said plate member by moving and pulling one end of said tape. 3. The apparatus according to claim 1, wherein said peeling means peels off said sheet from said plate member by fixing one end of said tape and moving said plate member relative to said tape. Sheet peeling equipment. 4. The peeling means comprises: holding means for holding one end of the tape from a roll-shaped tape wound with the tape and drawing the tape by a predetermined length; and cutting the tape drawn by the predetermined length by the holding means. Cutting means, after being cut by the cutting means, pressing means for pressing the adhesive surface at the other end of the tape against the sheet, and by moving the holding means, pulling one end of the tape to pull the plate The sheet peeling apparatus according to claim 2, further comprising: a moving unit configured to peel the sheet from a member. 5. The sheet peeling apparatus according to claim 4, wherein said holding means has a chuck for sandwiching said tape in a width direction. 6. The peeling means presses the peeled sheet forward in a state where one end of the tape is pulled by the holding means and a part of the sheet is peeled off from the plate member. 3. The sheet peeling device according to claim 2, further comprising a separating unit that further peels the sheet. 7. The sheet peeling device according to claim 2, wherein said tape is attached to a corner of said plate member. 8. A sheet is stuck on both sides of said plate member, and when a first tape and a second tape are stuck on both sides thereof, said sheet is stuck on one side of one corner of said plate member. The sheet peeling method according to claim 2, wherein a first tape is attached, and the second tape is attached to the other surface of the corner so as to be substantially orthogonal to the first tape. apparatus. 9. A plate member supply system comprising: a sheet peeling device for peeling off a sheet stuck on at least one surface of a plate member; and a dust removing device for removing dust from the plate member from which the sheet has been peeled off. . 10. The plate member supply system according to claim 9, further comprising: a conveying device that conveys the plate member from which the sheet has been separated by the sheet separating device to the dust removing device.