JPH05247411A - Method for sticking self-adhesive sheet, and air ejector - Google Patents

Abstract

PURPOSE:To improve the working efficiency in sticking a strip of a self-adhesive sheet to an adherend and to prevent the inclusion of air bubbles between the self-adhesive sheet and the adherend and the occurrence of wrinkle. CONSTITUTION:The base end of a hollow casing 1 of a wedge-shaped section, having an opening 3 in slit form provided at the tip, is connected to a negative pressure source V through a connecting tube 2 and a flexible hose 7, and the upper side of the casing 1 is covered with a Teflon film 5. After a part of a self-adhesive sheet S is stuck to an adherend W, the opening 3 of the casing 1 is inserted into a wedge-shaped gap A formed between the self-adhesive sheet S and the adherend W, and the negative pressure source V is operated so that the atmospheric pressure causes the self-adhesive sheet S to join with the adherend W. Accordingly, by retreating the casing 1 to move the wedge-shaped gap A, the self-adhesive sheet S can be continuously stuck to the adherend W. During that time, the casing 1 can be smoothly slid in relation to the self-adhesive sheet S by the action of the Teflon film 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an adhesive or an adhesive on the back surface to decorate or protect the surface of advertising signs, vending machines, automobiles, etc. (hereinafter referred to as adherends). The present invention relates to a method for sticking an applied strip-shaped sheet or film (hereinafter referred to as an adhesive sheet) on the surface of the adherend, and an air ejector used for carrying out the method.

[0002]

2. Description of the Related Art Conventionally, as a method for laminating an adhesive sheet on another sheet or film, a roll laminating method has been widely used in which the both are placed in a pressure-bonding roll machine and continuously pressure-bonded. ing.

If the adherend is a three-dimensional object, the pressure-bonding roll machine cannot be used. Therefore, for example, a colored adhesive sheet or a printed adhesive sheet may be attached to a signboard with a frame or a vending machine. In the case of decoration, the pressure-sensitive adhesive sheet was placed on the surface of the adherend and the squeegee held by the operator pushed out the air entering the adherend to attach the pressure-sensitive adhesive sheet. Further, as a device for covering the surface of a vehicle body with an adhesive sheet in order to protect the coated surface from rain, dust, bird droppings, etc. when shipping a completed automobile from a factory, it is disclosed in JP-A-3-2
The one described in Japanese Patent No. 54858 is known.

[0004]

However, it is very difficult to apply the pressure-sensitive adhesive sheet smoothly using a squeegee as described above, and bubbles or wrinkles may remain between the pressure-sensitive adhesive sheet and the adherend. Occurrence was unavoidable. Further, the apparatus described in the above publication covers the entire automobile with a single pressure-sensitive adhesive sheet using a vacuum forming apparatus, and there is a problem that equipment cost increases because the entire apparatus is large and the structure is extremely complicated. there were.

The present invention has been made in view of the above circumstances, and an object of the present invention is to attach an adhesive sheet to the surface of an adherend easily and with good appearance.

[0006]

In order to achieve the above object, the present invention provides a method for applying a pressure-sensitive adhesive sheet, which comprises applying a strip-shaped pressure-sensitive adhesive sheet to the surface of an adherend, by covering the longitudinal end of the pressure-sensitive adhesive sheet. After sticking to the surface of the adherend, the air in the wedge-shaped space formed between the adhesive sheet and the adherend is discharged to press the adhesive sheet against the adherend at atmospheric pressure, and the wedge-shaped space is formed in the longitudinal direction of the adhesive sheet. The first feature is that the pressure-sensitive adhesive sheet is continuously attached to the adherend while being moved to.

Further, the present invention is an air ejector for discharging air in a wedge-shaped space formed between an adhesive sheet and an adherend in order to attach a strip-shaped adhesive sheet to the surface of the adherend, wherein the negative pressure is negative. A second feature is that a hollow box connected to the source is provided with a slit-shaped opening facing the wedge-shaped space.

In addition to the above-mentioned second feature, the present invention also provides:
A third feature is that a low-friction member that is in sliding contact with the adhesive sheet is attached to the surface of the hollow box.

In addition to the above-mentioned second feature, the present invention also provides:
A fourth feature is that a low-friction member that is in sliding contact with the adherend is attached to the surface of the hollow box.

In addition to the above-mentioned second feature, the present invention also provides:
A fifth feature is that a roller for guiding the adhesive sheet is provided along the opening.

In addition to the above-mentioned second feature, the present invention also provides:
A sixth feature is that a flexible suction nozzle adapted to the surface shape of the adherend is attached to the opening.

In addition to the sixth feature described above, the present invention also provides
A seventh feature is that a spacer that allows the flow of air and receives the atmospheric pressure is provided inside the suction nozzle.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view of an air ejector, and FIG. 2 is a sectional view showing a usage state of the air ejector.

The air ejector E is for sticking a colored strip-shaped adhesive sheet on the surface of a signboard with a frame, and is a hollow box 1 made of iron and having a triangular shape in plan view, and this hollow box. 1 and a connecting pipe 2 which is integrally welded to the base end thereof and whose cross section changes smoothly from a rectangular shape to a circular shape. The cross-sectional shape of the hollow box body 1 changes such that the height gradually decreases and the width gradually increases from the base end side toward the tip end side, and a slit-shaped opening having a width of 300 mm and a height of 2 mm is formed at the tip. Three
Is formed. Inside the hollow box 1, three reinforcing plates 4 are arranged so as to connect the upper wall and the lower wall, and a Teflon film 5 is attached to the upper surface of the hollow box 1 with a double-sided adhesive tape 6. To be combined. Then, the connecting pipe 2 is connected to a negative pressure source V such as a vacuum cleaner via a flexible hose 7.

In the air ejector E having the above structure, the adhesive sheet S formed by applying the adhesive S ₂ to the strip-shaped film S ₁
In order to attach the adhesive sheet W to a framed signboard, first, the end portion of the adhesive sheet S is attached to a predetermined position of the adherend W with a width of 10 mm to 20 mm, and the adhesive sheet S and the adherend W are attached. When the opening 3 of the air ejector E is inserted into the wedge-shaped space A formed between and the negative pressure source V is operated, the air in the wedge-shaped space A is discharged and the adhesive sheet S is adhered at atmospheric pressure. It adheres to the surface of the body W. Therefore, by slowly retracting the air ejector E, the adhesive sheet S can be continuously attached to the adherend W, and the finish thereof is beautiful with no remaining bubbles or wrinkles. At this time, the upper surface of the hollow box 1 is in sliding contact with the surface of the adhesive S ₂ of the adhesive sheet S, but the Teflon film 5 attached to the upper surface of the hollow box 1 allows the air ejector E to move smoothly. .. Further, the atmospheric pressure acts on the surface of the hollow box body 1 which is connected to the negative pressure source V and has a negative pressure inside, and by supporting the atmospheric pressure by the reinforcing plate 4, the hollow box body 1 is crushed. To be prevented.

FIGS. 3 and 4 show a second embodiment of the present invention. The air ejector E of this embodiment is for sticking a strip-shaped adhesive sheet on which characters and patterns are printed on the side surface of the vending machine. Used for. Hollow box 8 having a wedge-shaped cross section
Is an upper plate 10 and a lower plate 11 fixed to the upper and lower surfaces of a square pipe 9 cut into a predetermined length with bolts 12.
0 and the lower plate 11 are provided with a structure in which a wedge-shaped side plate 13 is sandwiched between the left and right ends of the lower plate 11 and fixed by bolts 14, whereby the hollow box 8
A slit-shaped opening 15 having a width of 470 mm and a height of 1.5 mm is formed at the tip of the. Inside the hollow box 8, the upper plate 1
In order to receive 0 and the atmospheric pressure acting on the lower plate 11, a plurality of wedge-shaped reinforcing plates 16 made of hard vinyl chloride are provided and fixed with bolts 17. The upper surface of the upper plate 10 and the lower plate 11
Teflon film 18 is attached to the lower surface of the double-sided adhesive tape 19
Affixed by.

A connecting pipe 20 communicating with the inside of the hollow box 8 through the through holes 9 ₁ , 9 ₂ formed in the square pipe 9 is fixed to the upper surface of the square pipe 9 via a bracket 21 having an L-shaped cross section. The connecting pipe 20 is connected to the negative pressure source V via a flexible hose 22. Left and right side plates 13 of the hollow box 1
The roller support plate 23 is fixed to the outer surface of the with bolts 24,
A roller 27 having an outer diameter of 30 mm is rotatably supported by a roller shaft 25 provided between the tips of the roller support plates 23 via a pair of ball bearings 26. A handle 29 is fixed to the rear surface of the square pipe 9 via two brackets 28, and an operator grips the handle 29 to operate the air ejector E.

In the air ejector E having the above structure, the adhesive sheet S is obtained by applying the adhesive S ₂ to the vinyl chloride film S ₁ and covering the adhesive S ₂ with the protective paper S _3.
In order to attach the adhesive sheet W to the side surface of the vending machine which is the adherend W, first, the end of the adhesive sheet S from which a part of the protective paper S ₃ has been peeled off is passed between the opening 15 of the hollow box body 8 and the roller 27 for 10 mm.
It is attached to a predetermined position of the adherend W with a width of up to 20 mm. At this time, the protective paper S ₃ is folded back along the upper surface of the upper plate 10 of the hollow box 8. From this state, when the negative pressure source V is operated and the operator grips the handle 29 and slowly retracts the air ejector E, air in the wedge-shaped space A formed between the adhesive sheet S and the adherend W is formed. Is discharged, and the adhesive sheet S continuously adheres to the surface of the adherend W at atmospheric pressure.

At this time, the pressure-sensitive adhesive sheet S is pulled by the roller 27 so as to follow the hollow box 8, and is pressed against the adherend W by the roller 27.
Remaining air bubbles and wrinkles are more effectively prevented. Further, as the air ejector E moves backward, the protective paper S ₃ along the upper surface of the hollow box 8 can be automatically peeled off from the adhesive S ₂ . Moreover, the Teflon film 18 attached to the lower plate 11 of the hollow box 8 not only enables the air ejector E to move smoothly, but also prevents the adherend W from being damaged by contact with the air ejector E. And the hollow box 8
The Teflon film 18 attached to the upper plate 10 makes it possible to improve the slipperiness of the pressure-sensitive adhesive sheet S with respect to the pressure-sensitive adhesive S ₂ and improve workability.

FIGS. 5 to 8 show a third embodiment of the present invention. An air ejector E of this embodiment has a strip-like adhesive tape which can be peeled off from the vehicle body surface in order to protect the painted surface of the vehicle. The sheet S, that is, the strip-shaped film S ₁ made of polyethylene, is coated with the re-peeling pressure-sensitive adhesive S ₂ on the back surface, and is used for sticking the surface-peeling S _{4 of} the film.

As shown in FIGS. 5 and 6, the hollow box 8 of the air ejector E according to this embodiment has a structure similar to that of the hollow box 8 of the second embodiment described above. The roller support plate 23, the bolt 24, the roller shaft 25, the ball bearing 26, the roller 27, and the lower Teflon film 18 and the double-sided adhesive film 19 of the second embodiment are not provided, but instead in the opening 15 of the hollow box 8. The feature is that the flexible suction nozzle 30 is provided. The same members corresponding to each other in the air ejector E of the second embodiment and the air ejector E of the third embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

The suction nozzle 30 has a nozzle width of 510 mm and is made of a flexible material, for example, a copolymer of ethylene and vinyl acetate, and has an upper nozzle half 31 and a lower nozzle half 32. Which are integrated by adhesion are attached to the opening 15 of the hollow box body 8 by a plurality of screws 33.

As is apparent from FIGS. 7 and 8, the upper nozzle half 31 of the suction nozzle 30 is a flat upper wall 31.
_1, a plurality of rib-like projections 31 ₂ that functions as a spacer projecting from the lower surface of the upper wall portion 31 _1, a mounting portion 31 ₃ formed in the rear edge of the upper wall 31 _1, the together are composed of bonded portion 31 ₄ formed on the left and right sides of the upper wall portion, the lower nozzle half 32 is plate-shaped lower wall portion 32
_1, a plurality of rib-like projections 32 ₂ that functions as a spacer protruding from the upper surface of the lower wall portion 32 _1, a mounting portion 32 ₃ formed in the rear edge of the lower wall portion 32 _1, the The lower wall portion 32 ₁ is composed of side wall portions 32 ₄ projecting upward on both left and right sides. Above the projection 31 ₂ of the upper nozzle half 31 and the protrusion 32 ₂ of the lower nozzle half 32 is formed to be inclined at 60 ° angle in opposite directions with respect to the front edge of the opening 15, they protrusions 31 _2, The top surfaces of 32 ₂ abut each other. And the upper nozzle half 31 and the lower nozzle half 32
Are integrated by adhesively bonding the adhesive portion 31 ₄ of the upper nozzle half body 31 and the upper surface of the side wall portion 32 ₄ of the lower nozzle half body 32. The Teflon film 18 provided only on the upper surface of the hollow box 8 is the upper plate 1 of the hollow box 8.
0 and the suction nozzle 30 are attached so as to cover the upper surfaces thereof.

Thus, also in the third embodiment, the air in the wedge-shaped space A formed between the adhesive sheet S and the vehicle body of the automobile as the adherend W is discharged as in the first embodiment. By sucking with the container E, the adhesive sheet S can be easily and cleanly attached. At that time, since the tip of the flexible suction nozzle 30 is curved following the surface shape of the adherend W, a gap is prevented from being generated between the adherend W and the suction nozzle 30, and the adhesive sheet The S sticking work can be performed more smoothly. Further, during operation, the suction nozzle 30 is vertically compressed by the atmospheric pressure acting on the upper wall portion 31 ₁ of the upper nozzle half body 31 and the lower wall portion 32 ₁ of the lower nozzle half body 32 of the suction nozzle 30, Upper and lower nozzle halves 3
Since the protrusions 31 ₂ and 32 ₂ formed on ₁ and 32 are in contact with each other to counter the pressure, there is no inconvenience that the suction nozzle 30 is crushed and air flow is blocked. Moreover, the protrusions 31 ₂ and 32 formed on the upper and lower nozzle halves 31 and 32, respectively.
_{Since the two} are slidable relative to each other on the contact surface, the suction nozzle 30 can be easily curved according to the surface shape of the adherend W.

Next, with reference to FIGS. 9 and 10, the procedure of the operation of attaching the adhesive sheet S to the hood portion of the automobile using the air ejector E will be described.

First, the roll 34 around which the adhesive sheet S is wound
Is suspended from the ceiling and supported horizontally. Subsequently, the bonnet 35 of the automobile is opened halfway and fixed by a jig (not shown) so as to be in a horizontal state, and then a small piece of the adhesive sheet S, in which the triangular portions 35 ₁ at the left and right rear portions of the bonnet are preliminarily die-cut, is manually attached. To coat. At this time, if there is a nozzle of the window washer in the triangular portion 35 _{1 of the} bonnet, the nozzle is used as the adhesive sheet S.
Cover with a small piece of. Next, the pressure-sensitive adhesive sheet S is unrolled from the roll 34, and the tip portion of the pressure-sensitive adhesive sheet S is attached to one side edge of the bonnet 35 leaving a predetermined folding margin, and then the pressure-sensitive adhesive sheet S is attached to the bonnet 35 by using the air ejector E described above. Stick on the surface. When the surface of the bonnet 35 is covered on the other side up to the side edge, the adhesive sheet S is cut with a predetermined folding margin left. When the rear half of the bonnet 35 is covered as described above, the same work is repeated to cover the front half of the bonnet 35, and then the folding margin of the adhesive sheet S remaining around the bonnet 35 is applied to the lower surface of the bonnet 35. Fold it in and finish the work. Incidentally, not only the bonnet 35 described above, but also the roof and the trunk of the automobile can be covered by the same procedure.

Further, since the pebbles bounced off by the tire hit the lower part of the side surface of the automobile and are easily scratched, a urethane film having chip resistance is coated with a thermosetting adhesive to protect this part. can do.
In this case, a film coated with a thermosetting adhesive is attached by the air ejector E shown in the third embodiment, and then the automobile is passed through a tunnel furnace and heated to cure the thermosetting adhesive. .. Since the urethane film is softer and easier to expand and contract than the polyester film, it is difficult to attach it by hand with a squeegee, but the workability is dramatically improved by using the air ejector E of the present invention.

11 and 12 show a modified example of the flexible suction nozzle 30. The upper nozzle half 31 of this modified example does not have a protrusion and the lower nozzle half 32 has an opening 15 formed therein.
Of the projection 3 ₂ number of rib-like functioning as spacers formed so as to extend at right angles to the edge abuts the lower surface of the upper nozzle half 31. 13 and 14 show another modification of the suction nozzle 30. This modification is characterized in that a large number of cylindrical projections 32 ₂ functioning as spacers are formed in the lower nozzle half 32. Thus, also by these modified examples of the suction nozzle 30, it is possible to obtain the same effects as those of the suction nozzle 30 shown in FIGS. 7 and 8.

FIGS. 15 to 17 show another modification of the suction nozzle 30, which is a nozzle body 3 made of a flexible material to be mounted in the opening 15 of the hollow box 8.
A spacer 37 made of a flexible material is also provided inside
Equipped with a structure. The spacer 37 includes a plurality of upper ribs 37 ₂ arranged in parallel in different directions on the upper surfaces of the lower ribs 37 ₁ arranged in parallel.
Are integrally molded in a state of being overlapped with each other, and are inserted into the inside of the nozzle body 36 and fixed by adhesion.
The suction nozzle 30 of this modified example can also be freely deformed following the curved surface of the vehicle body of the automobile, and the action of the spacer 37 allows air to flow while allowing the nozzle body 36 to move under atmospheric pressure. Crushing can be prevented.

Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various small design changes can be made.

[0032]

As described above, according to the first feature of the present invention, the pressure-sensitive adhesive sheet is continuously adhered at atmospheric pressure while discharging the air in the wedge-shaped space formed between the pressure-sensitive adhesive sheet and the adherend. Since it is pressed against the body and applied, the inconvenience of bubbles remaining between the adhesive sheet and the adherend and wrinkles on the adhesive sheet can be avoided, and the adhesive sheet can be applied to the adherend in good appearance and efficiently. Is possible.

According to the second aspect of the present invention, an air ejector for discharging the air in the wedge-shaped space formed between the adhesive sheet and the adherend to attach the adhesive sheet to the adherend is provided. Since the hollow box connected to the pressure source is provided with the slit-shaped opening, it is possible to efficiently attach the adhesive sheet to the adherend with an air ejector having a simple structure.

Further, according to the third aspect of the present invention, since the low friction member which is in sliding contact with the adhesive sheet is attached to the surface of the hollow box, the adhesive sheet may impede the smooth movement of the air ejector. There is no.

According to the fourth aspect of the present invention, since the low friction member which is in sliding contact with the adherend is attached to the surface of the hollow box, not only the air ejector can move smoothly, but also the air ejector can move smoothly. There is no risk of the adherend being damaged by contact with the air ejector.

Further, according to the fifth feature of the present invention, since the guide roller for guiding the adhesive sheet along the opening of the hollow box is provided, the operation of attaching the adhesive sheet to the adherend can be further facilitated. It is possible to perform in a good appearance.

According to the sixth aspect of the present invention, since the flexible suction nozzle adapted to the surface shape of the adherend is attached to the opening of the hollow box, the surface of the adherend is curved. Also, an adhesive sheet can be attached to an adherend.

According to the seventh feature of the present invention, since the spacer having a large number of through holes is arranged inside the suction nozzle, there is a risk that the suction nozzle is crushed by the negative pressure generated by the negative pressure source. There is no.

[Brief description of drawings]

FIG. 1 is a perspective view of an air ejector according to a first embodiment.

FIG. 2 is a sectional view showing a usage state of the air ejector according to the first embodiment.

FIG. 3 is a plan view of an air ejector according to a second embodiment.

4 is a sectional view taken along line 4-4 of FIG.

FIG. 5 is a plan view of an air ejector according to a third embodiment.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is a partial perspective view of an air ejector.

FIG. 8 is an exploded perspective view of a suction nozzle.

FIG. 9 is an explanatory diagram of operation

FIG. 10 is an explanatory diagram of the operation

FIG. 11 is a view corresponding to FIG. 3 showing a modified example of the suction nozzle.

12 is a sectional view taken along line 12-12 of FIG.

FIG. 13 is a view corresponding to FIG. 3, showing another modification of the suction nozzle.

14 is a sectional view taken along line 14-14 of FIG.

FIG. 15 is the same as FIG. 6 showing another modification of the suction nozzle.
Figure corresponding to

FIG. 16 is an overall perspective view of a spacer

[Explanation of symbols]

1 Hollow Box 3 Opening 5 Teflon Film (Low Friction Member) 8 Hollow Box 15 Opening 18 Teflon Film (Low Friction Member) 27 Roller 30 Suction Nozzle 31 ₂ Protrusion (Spacer) 32 ₂ Protrusion (Spacer) 37 Spacer A Wedge Space V negative pressure source S adhesive sheet W adherend

Claims (7)

[Claims] 1. An adherend (W) is provided with a band-shaped adhesive sheet (S).
In the method for sticking a pressure-sensitive adhesive sheet to be stuck to the surface of a substrate, after sticking the longitudinal end of the pressure-sensitive adhesive sheet (S) to the surface of the adherend (W), the pressure-sensitive adhesive sheet (S) and the adherend (W) are The air in the formed wedge-shaped space (A) is discharged to press the adhesive sheet (S) against the adherend (W) at atmospheric pressure, and the wedge-shaped space (A) is moved in the longitudinal direction of the adhesive sheet (S). A method of sticking an adhesive sheet, which comprises continuously sticking the adhesive sheet (S) to the adherend (W) while allowing it to proceed. 2. An adhesive sheet (S) and an adherend (W) for sticking a strip-shaped adhesive sheet (S) on the surface (W) of the adherend.
An air ejector for ejecting air in a wedge-shaped space (A) formed between the slits, the slit facing the wedge-shaped space (A) in a hollow box body (1, 8) connected to a negative pressure source (V). An air ejector characterized in that it is provided with a circular opening (3, 15). 3. The air ejector according to claim 2, wherein a low-friction member (5, 18) that is in sliding contact with the adhesive sheet (S) is attached to the surface of the hollow box (1, 8). .. 4. The air ejector according to claim 2, wherein a low-friction member (18) slidably contacting the adherend (W) is attached to the surface of the hollow box (8). 5. The air ejector according to claim 2, further comprising a roller (27) for guiding the adhesive sheet (S) along the opening (3, 15). 6. The air ejector according to claim 2, wherein a flexible suction nozzle (30) conforming to the surface shape of the adherend (W) is attached to the opening (3). 7. A spacer (3) which allows air to flow inside the suction nozzle (30) and receives atmospheric pressure.
12. The air ejector according to claim 6, characterized in that 1 ₂ , 32 ₂ , 37) are provided.