JPH0431856B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for attaching a plastic film to a printed circuit board, for example, and an attaching device for carrying out this method. .

[Conventional technology]

A known technique described in Japanese Patent Laid-Open No. 52-14876, for example, as an apparatus for pasting a plastic film onto a printed circuit board, cuts the film with a rotating cutter between the tip of a vacuum bail and the rear end of a vacuum shoe. The rear end of the film in front of the cut section is pasted to the front panel by a pasting roller in front of it.

Further, the film adsorbed to the vacuum bail is adhered by moving the vacuum bail onto the stopped panel.

After adhering the leading edge of the film to the panel, the vacuum bail is retracted, and then the panel is first advanced and applied by an applicator roller in front of it.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, the panel is advanced after the tip of the film is attached to the panel using a vacuum bail, so if there is even a slight slack in the tip of the film, wrinkles may occur in the film. Air bubbles may form between the film and the panel.

In addition, it is difficult to attach a frame to the panel by leaving the periphery of the panel intact.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art as described above and to provide a method and apparatus that can accurately attach the leading end of a film.

[Means to solve the problem]

In order to achieve the above object, the present invention has a film in which a portion slightly behind the leading end of the film is pasted onto a substrate using a pasting roller, and the front end of the film in front of this pasted portion is raised above the substrate. A film adhesion method and an adhesion roller characterized in that the leading end of the film is adhered to the substrate by once retracting the substrate, and then the film is adhered to the substrate by advancing the substrate. Attach a rotatable vacuum suction tool to the substrate, and when the sticking roller moves onto the substrate and reaches the position where the film adsorbed by the vacuum suction tool is pasted, the vacuum suction tool will tilt upward. The supply roller feeds the substrate to the lower part of the sticking roller by interlocking the sticking roller and the vacuum suction tool so that the leading edge of the film in front of the sticking roller is lifted off the substrate. To provide a film sticking method in which the film is driven by a reversible driving means that acts to temporarily retreat the substrate under the condition that a part of the film slightly behind the front end of the film is stuck on the substrate by a deposition roller. It is something.

[Effect]

Since this invention is as described above, the film whose leading end is attracted by the vacuum suction tool moves to the substrate together with the sticking roller, and the part slightly behind the leading end of the film is stuck onto the substrate by the sticking roller. do.

At this time, since the vacuum suction tool is oriented obliquely upward, the tip of the film stuck by the vacuum suction tool is not stuck to the substrate.

Next, as the substrate begins to retreat, the leading edge of the film is attracted to the suction surface on the bottom of the vacuum suction tool and slides back on the suction surface, until the leading edge of the film is completely adhered to the substrate. Ru.

Thereafter, the substrate is moved forward until the entire film is adhered onto the substrate.

〔Example〕

In the embodiment shown in the figure, reference numeral 1 denotes frames on both sides, and a belt-shaped film 3 having an adhesive surface on one side is wound around a winding shaft 2 mounted between the two frames 1.

A pair of upper and lower supply rollers 5, a pair of upper and lower adhesive rollers 6 made of rubber or the like, a pair of upper and lower adhesive and transaction rollers 7, and a conveyor roller 8 are rotatably installed in order between the lower part of the frame 1. A conveyor belt 9 is wrapped around the roller 8.

The lower supply roller 5 is capable of forward or reverse rotation by an appropriate driving means, and the upper supply roller 5 is freely rotatable up and down and is pressed against the lower supply roller 5 by a spring or the like.

Further, the lower take-up roller 7 is intermittently driven in the direction of the arrow by an appropriate driving means, and the upper take-up roller 7 is driven intermittently in the direction of the arrow.
is freely rotatable up and down, and is pressed against the lower take-up roller 7 by a spring or the like.

In the case of this embodiment, since the adhesive is applied to one side, the lower adhesive roller 6 can be driven in forward and reverse directions and stopped at a fixed position, and the upper adhesive roller 6 can freely rotate and move up and down.

11 is a swinging lever at the top, and a shaft 12 at the rear end
It is rotatably attached to the frame 1.

The lever 11 and the shaft 12 are integrated, and the shaft 12 is rotated by a driving means such as an air cylinder and a lever (not shown) to swing the lever 11 up and down within a certain range, and a stopper is provided at a predetermined position. so that it can be fixed in place.

Reference numeral 15 denotes a shaft rotatably attached to the frame 1 at the lower part of the shaft 12, and a downward lever 16 is fixed to this shaft.

The shaft 15 is also rotated within a certain range by driving means such as an air cylinder and a lever (not shown), so that the lever 16 can be swung back and forth and fixed by a stopper at a predetermined position.

The shafts at both ends of the upper sticking roller 6 are rotatably fitted to the lower ends of a pair of left and right movable frames 17, and the front ends of the levers 11 are rotatably connected to the upper portions of the frames 17. Further, a pair of left and right links 1 are provided near the bottom of both frames 17 and at the lower ends of both levers 16.
The front and rear ends of 8 are rotatably connected.

Guide rollers 19 are provided at the upper ends of the left and right frames 17.
is rotatably mounted thereon, and a guide roller 20 is also rotatably mounted on the outside of the shaft 12.

Reference numeral 22 denotes a receiving frame fixed to the frame 1 so as to be located in front of the upper take-up roller 7, and its lower surface a is an inclined surface facing upward in the front.

The front surface of the receiving frame 22 serves as a blade receiving surface perpendicular to the lower surface a, and the outer circumferential surface of the disc-shaped rotary cutter 23 is slidably brought into close contact with this surface.

Reference numeral 24 denotes a guide rod for the rotary cutter 23, which is fixed to the left and right frames 1, and the rotary cutter 2 is attached to a movable frame 25 that moves left and right along the guide rod 24.
A shaft 26 of No. 3 is attached so as to be rotatable and movable in the axial direction, and a spring 27 pushes the shaft 26 to press the rotary cutter 23 against the front surface of the receiving frame 22.

The receiving frame 22 is hollow, and its lower surface a is a porous suction surface.

28 is a rack gear arranged parallel to the guide rod 24 and fixed to the frame 1;
A pinion gear 29 at the rear end of the shaft 26 is engaged with the pinion gear 29, and as the moving frame 25 moves, the pinion gear 29 rotates to rotate the rotary cutter 23.

Although not shown, the moving frame 25 is moved by a driving means using a motor, a timing belt, or the like.

Reference numeral 30 denotes a hollow suction tool, which is coaxial with the sticking roller 6, rotates separately from the same roller 6, and is provided over the entire length of the roller 6. In addition, when the roller 6 is at the most retreated position, the surface that is flush with the lower surface a of the receiving frame 22 becomes a porous suction surface b, and at this time, the lower side of the surface that contacts the receiving frame 22 is the rotary cutter 2.
The outer periphery of No. 3 is a recess into which it is fitted.

Reference numeral 31 is a link connecting the upper side of the suction tool 30 and the intermediate portion of the swing lever 11, and has the role of lifting the rear part of the suction tool 30 when the pasting roller 6 moves forward and downward.

Next, a method of attaching a film using the above-mentioned apparatus will be explained.

FIG. 1 shows the starting state, with the swing lever 11
is the upper limit, and the lever 16 is in the retracted position.

At this time, the lower surface a of the receiving frame 22 and the suction surface b of the suction tool 30 are in the same plane, and the upper sticking roller 6
It is tangential to .

In this state, the leading end of the film 3 is pulled out from the roll shaft 2 and passed through the guide rollers 20, 19 and the upper sticking roller 6 with the sticking surface outside, and reaches the suction surface b, where it is cut by the cutter 23, and the adsorption tool The leading end of the film 3 is attracted by vacuum suction inside the film 30.

At this time, the lower surface a of the receiving frame 22 also attracts the rear end of the previous film to prevent the film from falling onto the substrate 32.

Further, the cutter 23 is located at a position where it does not interfere with the movement of the film 3, as shown in FIG.

Next, when the lower lever 16 is rotated forward while the upper shaft 12, that is, the lever 11 is fixed with a stopper, the frame 17 is rotated as shown in FIG.
rotates forward about the shaft at the tip of the lever 11, so the tip c of the film 3 is separated from the lower surface a of the receiving frame 22.

On the other hand, the substrate 32 sent by the conveyor from the substrate supply section on the right side of FIG. 1 is sandwiched between the upper and lower supply rollers 5 and stopped at the positions shown in FIGS. There is.

When the state shown in Fig. 4 is reached, the shaft 15 and the lever 1
6 is in a fixed state, and now the shaft 12 and lever 11
rotates downward, and the upper sticking roller 6 presses onto the substrate 32 as shown in FIGS. 4 and 5.

For this reason, the film 3 on the outer periphery of the upper sticking roller 6 is stuck onto the substrate 32, but since the suction surface b of the tip c is inclined upward and the vacuum suction action continues. Part c is not attached to the substrate 32.

As shown in FIG. 4, the position of the leading end c should be the same as the position when the film was cut, or it should be pulled back a little to remove wrinkles at the leading end of the film.

Then, as shown in FIG. 6, the supply roller 5 rotates in the opposite direction to move the substrate 32 backward.

As mentioned above, when the substrate 32 retreats, the tip c of the film 3 adsorbed on the adsorption surface b also moves onto the substrate 3.
2 and is attached onto the substrate 32.

At this time, the suction surface b continues to attract the film 3, but the suction force is relatively weak, so the vicinity of the tip c is attracted to the suction surface b and is stuck onto the substrate 32 without loosening.

In this way, the tip c of the film 3 is attached to the sticking roller 6.
When the tip c is completely stuck on the substrate 32, the supply roller 5 starts to rotate normally as shown in FIG. 7, and the substrate 32 starts moving forward, as shown in FIG. The remaining parts are pasted onto the substrate 32.

When the substrate 32, which is moving forward with the film 3 attached to its upper surface as described above, is pinched by the upper and lower attaching and taking-off rollers 7 as shown in FIG.
16 operates to return the pasting roller 6 and suction tool 30 to their original positions, and when the rear end of the substrate 32 reaches the position of a sensor (not shown), the substrate 32 is stopped.

When the movable frame 25 starts traveling along the guide rod 24 in this state, the film 3 is cut off by the cutter 23 which rotates under the action of the pinion gear 29 and the rack gear 28.

When the moving frame 25 moves to the other end and stops, the take-up roller 7 starts rotating again to remove the film 3.
The remaining portion is completely pasted onto the substrate 32 and sent onto the conveyor belt 9 running in the direction of the arrow, completing one pasting process. Thereafter, the state returns to the state shown in FIG. 1 and the next action begins.

In the above operation, by adjusting the position of the tip of the substrate 32 at the time of starting the attachment of the film 3, the tip of the substrate 32 and the film 3 to be attached can be adjusted.
You can freely change the position of the tip c of the film 3.
The positions of the rear end and the rear end of the board 32 can also be changed freely.

Although the above embodiment describes the case where the film 3 is attached only to the upper surface of the substrate 32, it is possible to attach the film 3 to both the upper and lower surfaces of the substrate 32 by providing a device symmetrical to the embodiment below. can be worn.

〔Effect of the invention〕

In this invention, as described above, the part of the film that is slightly inward from the leading edge is pasted onto the substrate, and the film before this pasted part is lifted up, and the substrate is temporarily retreated to remove the leading edge. Since the adhesive roller is used to adhere the film, the leading end of the film is reliably adhered to the substrate.

Therefore, it is most suitable for applying the film from a position slightly inside the tip of the board.
It is also very easy and quick to make a so-called picture frame, in which the width of the film is made slightly narrower than the width of the substrate so that the four sides of the substrate protrude from the four sides of the film.

In addition, as a device, a rotatable adsorption tool is attached to the adhesion roller, and in conjunction with the vertical movement of the adhesion roller, the adsorption tool rotates and tilts upward, and the adhesion roller rises. Since the film adsorbed by the suction tool is cut under the same conditions as described above, the above-described adhesion method can be easily carried out with a simple mechanism.

In other words, when the sticking roller is raised and the tip of the film is adsorbed by the suction tool, the film is cut with a cutter, and then the adhesion roller is pressed onto the substrate below. The above-mentioned method of the present invention can be easily carried out with a simple structure, since the part of the film is attracted to the substrate, and then, when the substrate is moved back, the floating tip of the film is stuck. can.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing an example of an apparatus for implementing the method of the present invention, FIG. 2 is a partially cutaway front view taken from line A-A in FIG. 1 in the direction of the arrow, FIGS. 3 and 4. 5 to 9 are longitudinal sectional side views showing the operating state.
The figure is a side view showing the main parts by process, and FIG. 10 is a perspective view of the substrate after the film is attached. 3... Film, 5... Supply roller, 6... Sticking roller, 7... Sticking and take-up roller, 11... Rocking lever, 16... Lever, 17... Movable frame, 1
8... Link, 22... Receiving frame, 23... Rotating cutter, 25... Moving frame, 30... Vacuum suction tool, 32
……substrate.

Claims (1)

[Claims] 1. A part of the film slightly behind the leading end is pasted onto a substrate using a pasting roller, and the front end of the film in front of this pasted part is lifted above the substrate,
A film pasting method characterized in that the leading end of the film is pasted onto the substrate by once retracting the substrate, and then the film is pasted onto the substrate by advancing the substrate. 2. Attach a rotatable vacuum suction tool to the adhering roller, and when the adhesion roller moves onto the substrate and reaches the position where the film adsorbed by the vacuum suction tool is pasted, the vacuum suction tool A supply roller that feeds the substrate to the bottom of the sticking roller by interlocking the sticking roller and a vacuum suction tool so that the tip of the film in front of the sticking roller is oriented diagonally upward and lifted from the substrate. is characterized in that the above-mentioned sticking roller is driven by a reversible driving means that operates to temporarily retreat the substrate under the condition that the part slightly behind the front end of the film is stuck onto the substrate. A film adhesion device.