JPH0624427A - Device to affix resin sheet on curved surface - Google Patents

Abstract

PURPOSE:To provide a device to affix a resin sheet on a curved surface which can complete the affixing by one process and can perfectly bond the sheet to every corner, and does not generate an unfavorable bonding based on the unevenness of a pressure distribution. CONSTITUTION:This device is an affixing device to affix a resin sheet on a curved surface of an article to be adhered, and consists of a pressing rubber roller 21 with a shpe which is adjusted approximately to the shape of a surface to be affixed which is a curved surface, a pressing unit 20 consisting of a pressing cylinder 22 to vertically press said pressing rubber roller 21 to the surface to be affixed, a copying mechanism 30 which moves said pressing unit 20 along the affixing surface of the article to be adhered while keeping the pressing direction vertical to the surface to be affixed, and a heating device which heats the resin sheet to be affixed and the affixing surface of the article to be adhered to a temperature by which the adherent effect of an adhesive can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin sheet curved surface sticking device. In recent years, a resin sheet is attached to the casing of a large-sized television to finish the appearance, but the casing of the television has not only a flat surface but also a curved surface, in particular, an R portion at a corner. The present invention relates to a sticking apparatus for sticking a resin sheet to an adherend having such a curved sticking surface.

[0002]

2. Description of the Related Art Conventionally, a resin sheet has been attached to a curved surface as follows. In FIG. 10, S is a resin sheet to be attached, and an adhesive is applied to the back surface thereof. C is an attachment surface such as a casing of a television. First, in the first first step, as shown in FIG. 10A, the sheet S is pressure-bonded to the attaching surface C by the rubber roller R from one end side, and is sequentially attached toward the other end side by the rotation of the rubber roller R. Next, as shown in FIG. 10 (B), the product to which the sheet S has been pressure-bonded in the second step is subjected to a direct pressure press P for thermocompression bonding.
It was thermocompression bonded.

[0003]

However, the above-mentioned conventional example has the following problems. Since two steps of the roller pressing in the first step and the thermocompression bonding in the second step are required, it takes time and labor to change the steps, and the efficiency is low. In the direct pressure press for thermocompression bonding in the second step, a rubber-shaped press that matches the shape of the pasted surface is used, but it is extremely difficult to accurately align the rubber press P and the sheet S. is there. For this reason, poor adhesion is likely to occur at the edges of the sheet. As shown in FIG. 11, when there is a stepped portion d on the pasted surface C and the height ti is larger than the thickness t2 of the sheet S, it is difficult to press the sheet S by the roller R with a uniform pressure. Is. As shown in FIG. 12, when the surface C to be adhered is curved in the longitudinal direction of the rubber roller R, the pressure distribution is not uniform and adhesion failure is likely to occur.

In view of the above-mentioned circumstances, the present invention is a resin sheet curved surface laminating apparatus in which the laminating is completed in one step, the entire corners of the sheet can be completely adhered, and no adhesion failure due to uneven pressure distribution occurs. The purpose is to provide.

[0005]

A resin sheet curved surface sticking apparatus of the present invention is a sticking apparatus for sticking a resin sheet to a curved sticking surface of an adherend, and is approximately the same as the curved sticking surface. A pressure unit including a pressure rubber roller having a matched shape and a pressure cylinder that presses the pressure rubber roller perpendicularly to the surface to be adhered, and the pressure unit is applied along the surface to be adhered to the object to be adhered. A tracing mechanism that moves while maintaining the pressure direction perpendicular to the pasted surface, and a heating device that heats the resin sheet to be pasted and the pasted surface of the adherend to a temperature at which the adhesive effect of the adhesive is enhanced. It is characterized by consisting of.

[0006]

In the present invention, the resin sheet is attached to the attaching surface by pressing the pressure rubber roller perpendicularly to the attaching surface by the pressure cylinder and moving the pressure unit along the attaching surface by the tracing mechanism. The resin sheet and the sticking surface can be heated by a heating device prior to or in parallel with this sticking work, so simply by rolling the pressure rubber roller on the sticking surface. Both the pressure-bonding and thermocompression-bonding processes on the side can be performed simultaneously. That is, the sticking work can be completed in one step. In the present invention, when the pressure rubber roller is provided with the origin adjusting mechanism, since the pressure rubber having the same shape as the shape of the resin sheet to be attached can be used, the positioning at the start of pressure bonding can be accurately adjusted. Can be completely attached to every corner. Further, when the rubber of the pressure rubber roller of the present invention is made of rubber having a low elastic modulus, it is possible to apply a uniform pressing force even when it is stepped down or the pasting surface is curved in the longitudinal direction of the roller. , No adhesion failure will occur.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a front view of a sheet sticking apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. 1 and 2, reference numeral 1 is a bed, and gate-shaped columns 2 and 2 are erected on both sides of the bed. Column 2, 2
The distance between them can be adjusted to the perspective by rotating the adjusting shaft 4 with the width adjusting handle 3. A slide table 5 is guided by rails 6 on the upper surface of the bed 1, and is moved by an air cylinder 7 to insert / extract position X and sticking work position Y.
It is supposed to make a round trip to and from. A work table 8 is placed above the slide table 5, and its height can be adjusted by a jig adjusting screw 9. The code
TV shows the casing of a large TV which is the adherend.

As shown in FIG. 1, one sticking unit 10 is attached to each column 2, and each sticking unit 10 includes a pressurizing unit 20, a tracing mechanism 30, and a heating device 40.
(See FIG. 6). The pressure unit 20 is mainly composed of a pressure rubber roller 21 and a pressure cylinder 22, and the tracing mechanism 30 is mainly composed of a drive cylinder 31, a guide plate 32 and a drive belt 33. In addition, as shown in FIG. 2, two pressure cylinders 22 are used to press one pressure rubber roller 21 so as not to generate an unbalanced load, and the pressure rubber roller 21 is attached to an adherend TV. Two follower mechanisms for smoothly moving along the plane C are provided, and a pair of right and left sides are provided.

Next, details of the sticking unit 10 will be described with reference to FIGS. First, the pressure unit 20 will be described.
The pressure rubber roller 21 is a roller whose shape is approximately matched to the sheet sticking surface (the television casing C), and the pressure rubber 23 is bonded to the surface thereof. This pressure rubber 23
Is a plane shape that matches the shape of the resin sheet to be attached, and rubber having a low elastic modulus is used as a material. If the elastic modulus of the rubber is high, the pressing force cannot be effectively transmitted. Therefore, it is preferable to use rubber having a low elastic modulus, that is, non-repulsive rubber that hardly generates repulsive force among the rubber materials.

Both end shafts of the pressure roller 21 are rotatably supported by a gate-shaped first holder 24, and a piston rod 22a of a pressure cylinder 22 is connected to the holder 24. The pressure cylinder 22 is fixed to the second gate-shaped holder 25. When the pressure cylinder 22 is expanded and contracted, the pressure rubber roller is pressed.
21 can be moved toward or away from the sticking surface C. Rollers 26 are rotatably supported on both ends of the second holder 25.

Next, the tracing mechanism 30 will be described. The cylinder tube 34 of the drive cylinder 31 is fixed to the guide plate 32, and the piston rod 35 is connected to the belt 33 by a connecting fitting 36. A guide block 37 is fixed inside the guide plate 34, and a guide groove 38 is formed therein. The shape of the guide groove 37 is a shape that allows the pressure rubber roller 21 to move along the attachment surface C, that is, a shape that can be followed. Therefore, in this embodiment, the corner portion has an inverted L-shape curved in the range of about 90 °.

The guide plate 32 also has a substantially inverted L shape in a side view, and three pulleys 41, 42, 43 are pivotally supported on the upper left and right sides and the lower end thereof, and the pulleys 41, 42, 43 have belts. 33 is hung around. The belt 33 is connected to the brackets 27 on the lower surfaces of both ends of the second holder 25 for fixing the pressure cylinder 22 at one position. Therefore, when the drive cylinder 31 is expanded and contracted, the belt 33 is pulled and the roller of the second holder 25 is pulled.
Since 26 rolls in the guide groove 38, the pressure unit 20 including the pressure cylinder 22 and the pressure rubber roller 21.
Will move back and forth along the surface of the sticking surface. In this embodiment, as shown in FIG. 5, a tension mechanism 44 for absorbing the slack of the belt 33 and a guide pulley 45 for guiding the bending of the belt 33 are attached.

Next, the origin adjustment mechanism 50 will be described. As shown in FIG. 4, brackets are provided on the lower surfaces of both ends of the first holder 24.
29 is fixed, and a pinion 51 is fixed to the end of the support shaft 28 of the pressure rubber roller 21. A rack 52 meshes with the pinion 51, the rack 52 is guided by a guide 53, and a cylinder 54 is connected. When the cylinder 54 is expanded and contracted, the pinion 51 rotates and the pressure rubber roller 21 rotates. Therefore, when the pressure rubber 23 has the same shape as the resin sheet to be attached, the positioning of both can be set accurately each time.

Next, the heating device 60 will be described. As the heating device, any device such as a far infrared heater or a warm air blower can be used. As shown in FIG. 7, the heating device 60 is arranged at a position where the sheet S to be pasted and the pasting surface C can be heated. To be done. The heating effect of the heating device 60 is sufficient if it can be heated to a temperature at which the adhesive effect of the adhesive applied to the back surface of the sheet S to be attached can be improved.

Next, the operation of attaching the resin sheet according to the above embodiment will be described. As shown in FIG. 3, the sheet S to be attached is placed on the attachment surface C of the adherend TV, and the positions thereof are aligned. This work may be done manually or another handling device may be used. The sheet S to be attached is made of a resin such as a plastic sheet or a vinyl chloride sheet, and the back surface thereof is preliminarily coated with an adhesive. The sheet S and the attachment surface C are heated by the heating device shown in FIG. 7 until the adhesive effect of the adhesive is sufficiently enhanced. Next, the pressurizing cylinder 22 is extended, the pressurizing rubber roller 21 is lowered from the work position (illustrated by an imaginary line), and the sheet S is pressed against the attaching surface C (illustrated by a solid line). Pressure rubber of this example
Reference numeral 23 has the same shape as the sheet S. At this time, the cylinder 54 of the origin adjusting mechanism shown in FIG. 6 is expanded and contracted to rotate the pinion 51, and the starting end of the pressure rubber 23 is aligned with the starting end of the sheet S.

Next, as shown in FIG. 8, when the drive cylinder 31 of the tracing mechanism is contracted, the belt 33 connected to the piston rod 35 of the tracing mechanism is pulled in the direction of the arrow, so that the pressure cylinder 22 and the pressure rubber roller 21 are removed. Is moved along the guide groove 38. Since the guide groove 38 has a shape similar to the outer shape of the sticking surface C as described above, the pressing force F of the pressurizing cylinder 22 always works perpendicularly to the sticking surface C. Subsequently, as shown in FIG. 9, when the drive cylinder 31 is contracted, the pressure cylinder 22 and the pressure rubber roller 21 advance to the final end of the sheet S to be attached, and pressure adhesion is completed. In the present embodiment, since the sheet S and the sticking surface C have been heated in advance as described above, the pressure and the heating are simultaneously performed, and the pressure-heat bonding is completed in the above steps.

From the above state, the drive cylinder 31 may be extended while the pressure rubber roller 21 is being pressed, and the bonding operation may be performed in the return path. If the adhering operation only on the outward path is sufficient, the pressure cylinder 22 is reduced to separate the pressure rubber roller 21 from the sheet S, and then the drive cylinder 31 is reduced to move the pressure rubber roller 21 and the like to the initial position. You may bring it back. Adhesion target TV whose sheet attachment is completed in the above process
2 may drive the air cylinder 7 shown in FIG. 2 to send the air cylinder 7 to the insertion / extraction position X and take in a new adherend TV.

In the case of this embodiment, since the pressure rubber 23 of the pressure rubber roller 21 is made of a rubber material having a low elastic modulus, the pressure force is sufficiently transmitted and a strong adhesive force can be obtained. Moreover, since it has some elastic force, it does not fall off as shown in FIG.
Even if there is a curved portion as shown in FIG. 5, uniform pressure can be applied to the entire sheet S, and adhesion failure can be prevented.

[0019]

According to the present invention, the sticking is completed in one step, and the sheets can be completely adhered to every corner of the sheet, and adhesion failure due to uneven pressure distribution does not occur.

[Brief description of drawings]

FIG. 1 is a front view of a resin sheet curved surface pasting position according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view of a main part of the resin sheet curved surface sticking device shown in FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an explanatory diagram of a tension mechanism 44.

FIG. 6 is an explanatory diagram of an origin adjustment mechanism 50.

FIG. 7 is an explanatory diagram of a heating device 60.

FIG. 8 is an explanatory view showing an adhesive action of the resin sheet curved surface sticking apparatus of FIG.

FIG. 9 is an explanatory view showing an adhesive action of the resin sheet curved surface sticking device of FIG. 1.

FIG. 10 is an explanatory diagram of a conventional resin sheet curved surface attaching method.

FIG. 11 is an explanatory diagram of a problem of the conventional sticking method.

FIG. 12 is an explanatory diagram of a problem of a conventional pasting method.

[Explanation of symbols]

20 Pressure Unit 21 Pressure Rubber Roller 22 Pressure Cylinder 23 Pressure Rubber 30 Tracing Mechanism 31 Drive Cylinder 32 Guide Plate 33 Belt 50 Origin Adjusting Mechanism 60 Heating Device

Claims (2)

[Claims] 1. A sticking device for sticking a resin sheet onto a curved sticking surface of an adherend, comprising: a pressure rubber roller having a shape approximately matching the curved sticking surface; and the pressure rubber roller. And a pressure unit configured to apply pressure vertically to the surface to be adhered, and the pressure unit is moved along the surface to be adhered on the object to be adhered while maintaining the pressing direction perpendicular to the surface to be adhered. A resin sheet curved surface laminating apparatus comprising: a tracing mechanism; and a heating device for heating a resin sheet to be pasted and a pasting surface of an adherend to a temperature at which the adhesive effect of the adhesive is enhanced. 2. The shape of the pressure rubber of the pressure rubber roller is
2. The resin sheet curved surface laminating apparatus according to claim 1, wherein the resin sheet curved surface laminating apparatus has the same shape as a resin sheet to be laminated and is provided with an origin adjusting mechanism for returning the rotational position of the pressure rubber roller to the origin.