JP2014141676A - Adhering method of pressure sensitive adhesive sheet for conservation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method in which a pressure sensitive adhesive sheet for conservation is stuck to a painted surface and a glass with high accuracy.SOLUTION: Provided is an adhering method of a pressure sensitive adhesive sheet for conservation in which a pressure sensitive adhesive sheet for conservation is stuck to a work-piece. The adhering method of a pressure sensitive adhesive sheet for conservation is characterized by including: a pressure adjusting process in which in a process in which while the work-piece and a squeegee are relatively moved so that the squeegee may pass on the work-piece, the pressure sensitive adhesive sheet is performed by pressing force by the squeegee to be thereby stuck to the work-piece, positional information of the squeegee detected by a position detector and an actual pressure by the squeegee detected by a pressure detector are compared with a base pressure predetermined corresponding to respective positions of the work-piece, and the pressing force by the squeegee to the pressure sensitive adhesive sheet is adjusted corresponding to an obtained deviation; and a travel speed adjusting process in which the positional information detected by the position detector is utilized to obtain an actual travel speed, and a relative travel speed between the squeegee and the work-piece is adjusted corresponding to a deviation that is obtained by comparing the actual travel speed with a predetermined base travel speed.

Description

  The present invention relates to a method for attaching a protective pressure-sensitive adhesive sheet for accurately attaching a protective pressure-sensitive adhesive sheet or the like to a work including a body and glass, such as a vehicle including a car, a motorcycle, a boat, and an aircraft. Here, the adhesive sheet prevents damage to the workpiece, for example. The pressure-sensitive adhesive sheet prevents deterioration of the body paint. Furthermore, the adhesive sheet affixed to the glass of the window reduces the incidence of ultraviolet rays into the interior of the vehicle and the fuselage, or reduces the incidence of infrared rays to suppress an increase in indoor temperature.

  In recent years, a transparent adhesive sheet has been applied to prevent damage to the painted surface of a vehicle such as an automobile and a body such as an aircraft. Moreover, the protective adhesive sheet colored instead of painting of the body is affixed (refer patent document 1).

  In addition, a protective film having an infrared reflection function that shields infrared rays (particularly near infrared rays) incident on a room through a light-transmitting substrate such as glass or a transparent resin plate installed in an automobile, a railway, a house, etc. is known. (See Patent Document 2).

  For example, when a coating film protective sheet is affixed to an outer plate such as an engine hood of an automobile, a jig is placed in the recessed portion of the painted surface of the outer plate. After covering the protective sheet on the jig, the jig is extracted. Thereafter, the operator presses the protective sheet with a squeegee and attaches it to the outer plate. (See Patent Document 3).

JP 2012-46723 A JP 2005-343113 A JP 2005-193077 A

  Conventionally, the following problems have arisen in the method of attaching a protective sheet. That is, since the adherend surface such as the vehicle body or window has a curved or uneven surface, there is a problem that the adhesive sheet cannot be attached with high accuracy.

  In other words, since the outer plate of the engine hood has a large area, it is difficult to reach the center portion when the operator manually attaches the squeegee, and the squeegee is moved intermittently. Also, the pressure on the adhesive tape is not uniform. In addition, the squeegee hits one side. Even if the operator intends to apply the adhesive carefully and attach the adhesive sheet to the workpiece without entrapment of bubbles at the interface between the workpiece and the adhesive, a line-shaped stop mark is formed at the position where the squeegee is stopped. Or dot-shaped irregularities or orange peels.

  This invention is made | formed in view of such a situation, Comprising: The sticking method of the protective adhesive sheet which can affix a protective adhesive sheet on various workpieces, such as bodies, such as a vehicle, and glass accurately is provided. The main purpose.

  The inventors have repeatedly conducted experiments to find out the cause of the above problem, and as a result, have been able to obtain the following knowledge.

  That is, a transparent model having the same shape as the workpiece or a plate made of the same material as the workpiece is placed and held on a transparent holding table, and the adhesive sheet is superimposed on the workpiece. After that, while moving the holding table, an experiment was performed in which the pressure-sensitive adhesive sheet was attached to the workpiece while pressing the pressure-sensitive adhesive tape with a squeegee. In this experiment, various setting conditions were changed. In the pasting process of this experiment, the pasting state of the adhesive sheet was photographed with a camera from below the holding table. When the state of the surface of the pressure-sensitive adhesive sheet was confirmed during and after the pressure-sensitive adhesive sheet was attached, it was in close contact with the work without entrainment of bubbles. The surface was also flat.

  However, when a predetermined time elapses after the adhesive sheet has been attached, dot-like irregularities are generated on the surface of the adhesive tape. In addition, when the construction liquid was applied to the workpiece and the pressure-sensitive adhesive sheet was attached, orange peel was generated on the surface of the pressure-sensitive adhesive sheet after a predetermined time had elapsed.

  When checking the image taken with the camera, it was found that the squeegee was hitting the part where the unevenness occurred. It was possible to obtain knowledge that excessive pressing acts on the pressure-sensitive adhesive to cause a change in the composition of the pressure-sensitive adhesive. Moreover, it turned out that an orange peel generate | occur | produces per piece of a squeegee when using a construction liquid.

  In order to achieve such an object, the present invention has the following configuration.

That is, a protective adhesive sheet attaching method for attaching a protective adhesive sheet to a workpiece,
In the process of pressing the adhesive sheet with the squeegee and sticking it to the work while moving the work and the squeegee relatively so that the squeegee passes over the work,
The position information of the squeegee detected by the position detector and the actual pressure by the squeegee detected by the pressure detector are compared with a reference pressure that is predetermined according to the position of the workpiece, and according to the obtained deviation. A pressure adjustment process for adjusting the pressure on the adhesive sheet;
The relative movement speed of the squeegee and the workpiece is determined according to the deviation obtained by calculating the actual movement speed using the position information detected by the position detector and comparing the actual movement speed with a predetermined reference movement speed. The moving speed adjustment process to be adjusted,
It is provided with.

  (Operation / Effect) According to this method, when the actual pressure is detected by the pressure detector, if detected from the position detector at the time of the detection, the reference pressure and the actual pressure determined in advance according to the position information are detected. Are compared. At the same time, a reference movement speed, an actual movement speed, and a reference movement speed that are determined in advance based on the position information are compared. As a result of these comparison processes, when a deviation occurs, the moving speed and the pressure are adjusted by operating the squeegee so that the predetermined reference pressure and reference speed are obtained. Therefore, excessive pressure does not act on the pressure-sensitive adhesive sheet, so that it is possible to suppress the occurrence of dot-shaped unevenness and orange peel after the pressure-sensitive adhesive sheet is attached.

Further, in the above apparatus, the theoretical pressure of the squeegee associated in accordance with the acceleration from the start of sticking of the adhesive sheet until reaching the target speed is obtained in advance.
Obtaining the actual acceleration from the position information detected by the position detector until the target speed is reached, obtaining the theoretical pressure according to the actual acceleration, and adjusting the pressure of the squeegee to the adhesive sheet based on the theoretical pressure preferable.

  According to this method, the actual acceleration is obtained at the start of application where the pressure on the pressure-sensitive adhesive sheet is excessively squeezed, and the squeegee pressure on the pressure-sensitive adhesive sheet is adjusted in advance to the theoretical pressure associated with the acceleration. The pressure-sensitive adhesive sheet can be affixed to the workpiece with the pressed pressure. Therefore, even if it is a sticking start part, generation | occurrence | production of the dot-like unevenness | corrugation and orange peel of an adhesive sheet can be suppressed.

  According to the method for adhering the protective adhesive sheet of the present invention, the protective adhesive sheet can be accurately applied regardless of the shape of the workpiece.

It is a front view of the sticking apparatus of the adhesive sheet for protection. It is a top view of the sticking apparatus of the adhesive sheet for protection. It is a side view of the sticking apparatus of the adhesive sheet for protection. It is a block diagram which shows schematic structure of the sticking apparatus of the adhesive sheet for protection. It is a flowchart which shows operation | movement of a circuit of the sticking apparatus of the adhesive sheet for protection. It is a figure explaining the operation | movement which sticks a protective adhesive sheet to an evaluation sample. It is a figure explaining the operation | movement which sticks a protective adhesive sheet to an evaluation sample. It is a figure explaining the operation | movement which sticks a protective adhesive sheet to an evaluation sample. It is a front view of a modification apparatus.

  An embodiment of the present invention will be described below with reference to the drawings. In addition, the workpiece | work which affixes the protection adhesive sheet by this Example apparatus is a coating surface, such as a body of a motor vehicle, the glass surface of a window, etc., for example.

  FIG. 1 is a front view showing an overall configuration of a protective adhesive sheet pasting apparatus according to an embodiment of the present invention.

  This pasting device is composed of a holding table 1 and a pasting unit 2. Hereinafter, each configuration will be described in detail.

  As shown in FIGS. 1 to 3, the holding table 1 is configured to hold the back surface of the workpiece W by vacuum suction or clamping. The holding table 1 is supported by a movable base 4 that can slide back and forth along guide rails 3 that are horizontally disposed in the front and back. The movable table 4 is reciprocated back and forth by an actuator provided with a servo motor 5 shown in FIG.

  The holding table 1 is configured such that the rotational speed of the serve motor 5 is changed by adjusting the voltage of the servo amplifier 7 so that the moving speed can be adjusted. Further, the rotary encoder 8 detects the position information of the holding table 1 and transmits the position information to the speed control unit 9 shown in FIG. The actuator corresponds to the horizontal drive mechanism of the present invention. The rotary encoder 8 corresponds to the position detector of the present invention.

  Returning to FIG. 1, the affixing unit 2 includes an elevating mechanism 10, an arm 11, a pressurizing mechanism 12, an angle adjusting mechanism 13, and the like.

  The lifting mechanism 10 includes a movable table 14. The movable table 14 moves up and down along the guide rail 18 by operating a handle 17 connected to a ball shaft 16 provided on a vertical frame 15 erected on the apparatus base.

  An arm 11 is mounted on the bottom surface of the movable base 14. A horizontal shaft 20 is inserted horizontally into the arm 11 so that the arm 11 is pivotally supported. A squeegee 22 with an edge facing downward is detachably attached to the distal end side of the arm 11 via a holding portion 21.

  A balancer 23 is mounted on the rear end side of the arm 11 so as to keep the arm 11 horizontal in a steady state.

  The pressurizing mechanism 12 is constituted by, for example, a low friction type air cylinder 12. The air cylinder 12 is mounted on a vertical plate 24 erected from the upper surface of the movable table 14, and is configured to be movable up and down integrally with the arm 11. The rod of the air cylinder 12 is connected to the upper surface from the tip of the arm 11. Therefore, the tip of the arm 11 is swung up and down around the horizontal axis 20 by the expansion and contraction of the rod of the air cylinder 12, and the pressure on the workpiece W can be adjusted.

  Here, as shown in FIG. 4, the air cylinder 12 is connected to an externally connected compressed air source 25, a primary pressure regulator 26, a pressure conversion regulator 27, and an electromagnetic valve 28 in this order from the upstream side. The pressure conversion regulator 27 is equipped with a check valve 29.

  The primary pressure regulator 26 outputs the pressure of the air supplied from the compressed air source 25 as a predetermined stable secondary pressure.

  The pressure conversion regulator 27 is composed of, for example, a regulator, and adjusts so as to keep a preset secondary pressure constant. That is, when the pressure regulator 24 detects a pressure change in the air cylinder 12, it calculates a deviation between the actual pressure of the detection signal and the set reference pressure, and adjusts the opening degree of the electromagnetic valve 28 and the check valve 29. Return to the set pressure. Note that the pressure conversion regulator 24 has the functions of the pressure detector and the pressure controller of the present invention.

  The angle adjustment mechanism 13 includes a potentiometer 30, a servo motor 31, a servo amplifier 32, a rotary encoder 33, and the like.

  The potentiometer 30 is mounted on the horizontal shaft 20 that supports the arm 11 and detects the swing angle of the arm 11. The detection signal is transmitted to the angle control unit 34.

  The servo motor 31 is connected to the holding unit 21 and makes it possible to change the contact angle of 22 with respect to the workpiece W. The rotation speed when changing the angle of the squeegee 22 is configured to be adjustable by controlling the voltage of the servo amplifier 32.

  The rotary encoder 33 detects a rotation angle when the angle of the squeegee 22 is changed, and transmits a detection signal to the angle control unit 34.

  Next, a round operation of the above-described embodiment apparatus will be described with reference to the flowchart shown in FIG.

  Before affixing the protective adhesive sheet PT to the workpiece W to be treated, the adhesive sheet PT is repeatedly applied to the plate-like evaluation sample W1 coated with the same material or the same material as the workpiece W using the above-described embodiment apparatus. Then, a pasting condition that does not cause defects such as bubble entrainment and dot-like irregularities is obtained, and a quantified database is created.

  Evaluation conditions are set (step S1). The evaluation conditions include, for example, the pressing (pressure) of the sample W1 by the squeegee 22, the contact angle of the squeegee 22, the moving speed of the holding table 1, and the like. These evaluation conditions are set by operating the operation panel 40 under conditions of a plurality of patterns from the range in which the adhesive sheet PT can be pasted on the workpiece W by manual processing by the operator. For example, in this embodiment, the three parameters of pressure, contact angle, and moving speed are set to be constant from the start to the end of sticking of the adhesive sheet PT. This constant value is changed.

  The evaluation sample W1 is placed and held on the holding table 1, and setting conditions are selected from the operation panel 40. An initial setting is made for the protective adhesive sheet attaching device (step S2).

  The holding table 1 moves to the pasting start position. That is, as shown in FIG. 6, the origin position is adjusted so that the front end of the evaluation sample W1 on the moving direction side coincides with the lowered position of the squeegee 22. At this time, the height adjustment of the arm 11 is completed by operating the handle 17.

  At the same time, the pressurization mechanism 12 and the angle adjustment mechanism 13 are also set. Here, the pressurizing mechanism 12 is adjusted to a secondary pressure that is stabilized at a value close to the set pressure value by the primary pressure adjuster 24.

  The angle adjustment mechanism 13 is set so that the squeegee 22 contacts the evaluation sample W1 at a predetermined angle. That is, the rotation angle of the servo motor 31 is detected by the rotary encoder 33, and the rotation of the servo motor 31 is controlled until the angle control unit 34 reaches the set angle based on the detection result.

  When the initial setting is completed, sticking of the adhesive sheet PT is started (step S3). As shown in FIG. 7, the arm 11 is rocked and lowered by the pressurizing mechanism 12, and the tip of the squeegee 22 is bonded and pressed to the adhesive sheet PT at a set angle. Thereafter, as shown in FIG. 8, the holding stage 1 is moved to the end position at the set speed.

  In the process of attaching the adhesive sheet PT, the rotary encoder 8 records the position information of the holding stage 1 in the storage unit 50 while detecting the position information (step S4A). The speed control unit 9 calculates a distance from the position information and differentiates the distance to obtain a moving speed (actual speed). Further, the reference speed set from the storage unit 50 is compared with the actual speed, and when a deviation occurs, the voltage of the servo amplifier 7 is changed, and the servo motor 5 is operated to keep the moving speed constant (step) S5A).

  Further, the swing angle (actual angle) of the arm 11 that swings as the squeegee 22 moves following the shape of the evaluation sample W1 is detected (step S4B). The actual angle detected by the potentiometer 30 is compared with the reference angle, and when a deviation occurs, the servo motor 31 is operated according to the deviation to make the contact angle of the squeegee 22 to the sample constant (step S5B).

  Furthermore, the pressure conversion regulator 27 detects a pressure change (step S4C). Each time a pressure change is detected, the actual pressure is compared with the set reference pressure, and the pressure is kept constant while adjusting the opening of the check valve 29 and the electromagnetic valve 28 according to the obtained deviation (step S5C).

  It is determined from the position information of the rotary encoder 8 whether or not the holding stage 1 has reached the pasting end (step S6). When the holding stage 1 reaches the end, the pressure applied by the pressure mechanism 12 is released, the arm 11 is swung up and returned to the standby position. At the same time, the holding stage 1 is returned to the origin position.

  The above-described operation of pasting the adhesive sheet PT to the evaluation sample W1 is completed, and the processing from step S1 to step S6 is repeated for each set condition.

  The pressure-sensitive adhesive sheet PT attached to the evaluation sample W1 under a plurality of conditions is observed for a predetermined time, and an optimum condition in which no squeegee marks or dot-like irregularities are generated is obtained.

  When the optimum condition is obtained, it is converted into a database and recorded in the storage unit 50 in the apparatus. The sticking of the adhesive sheet PT to the actual workpiece W to be processed is selected and executed from the database in a timely manner.

  This completes one round of the operation of the embodiment device, and thereafter, the same operation is repeated until the predetermined number is reached.

  According to the above-described embodiment device, the pressure-sensitive adhesive sheet PT is formed by keeping the contact angle, the pressing force, and the moving speed of the squeegee 22 constant while corresponding to the shape of the workpiece W, based on the optimum attaching condition acquired by the evaluation sample W1. Can be pasted. That is, the protective adhesive sheet PT can be automatically attached to the workpiece W under optimum conditions that do not cause appearance defects such as squeegee marks and dot-like irregularities.

  In addition, this invention can also be implemented with the following forms.

  (1) In the above-described embodiment apparatus, the holding stage 1 may be made of a transparent material such as acrylic, and as shown in FIG. 9, an imaging device 60 such as a camera may be provided below the attachment position. According to this configuration, it is possible to confirm the state in which the adhesive layer in the attaching process is elastically deformed by attaching the adhesive sheet PT to the evaluation sample made of a transparent material.

  (2) In the above embodiment, the angle adjustment of the squeegee 22 is also performed in the process of attaching the adhesive sheet PT having the same shape as the workpiece W to the evaluation sample W1, but the squeegee 22 may be fixed.

  (3) In each of the above embodiments, the actual acceleration until the set target moving speed is reached may be obtained, and the pressure of the squeegee 22 may be adjusted according to the actual acceleration. For example, the optimum pressing according to the acceleration is obtained by experiment or simulation, and is stored as a database in association with it. In this case, insufficient pressure or excessive pressure at the start of application is not applied to the adhesive sheet PT.

  (4) In each of the above-described embodiments, the squeegee 22 may be configured to be capable of adjusting swinging to the left and right. Therefore, in the process of sticking the adhesive sheet PT, the swing angle is changed following the shape of the workpiece W, so that the squeegee 22 can be prevented from hitting one piece.

DESCRIPTION OF SYMBOLS 1 ... Holding table 2 ... Pasting unit 5 ... Servo motor 8 ... Rotary encoder 9 ... Speed control part 12 ... Pressure mechanism 13 ... Angle adjustment mechanism 22 ... Squeegee 27 ... Pressure conversion adjustment mechanism 30 ... Potentiometer 33 ... Rotary encoder 34 ... Angle Control unit

Claims (2)

It is a method of attaching a protective adhesive sheet to a protective adhesive sheet on a workpiece,
In the process of pressing the adhesive sheet with the squeegee while moving the work and the squeegee relatively so that the squeegee passes over the work,
The position information of the squeegee detected by the position detector and the actual pressure by the squeegee detected by the pressure detector are compared with a reference pressure that is predetermined according to the position of the workpiece, and according to the obtained deviation. A pressure adjustment process for adjusting the pressure on the adhesive sheet;
The relative movement speed of the squeegee and the workpiece is determined according to the deviation obtained by calculating the actual movement speed using the position information detected by the position detector and comparing the actual movement speed with a predetermined reference movement speed. The moving speed adjustment process to be adjusted,
A method for attaching a protective pressure-sensitive adhesive sheet, comprising: In the sticking method of the adhesive sheet for protection according to claim 1,
Obtaining the theoretical pressure of the squeegee associated in accordance with the acceleration from the start of application of the adhesive sheet until reaching the target speed,
Obtaining the actual acceleration from the position information detected by the position detector until the target speed is reached, obtaining the theoretical pressure according to the actual acceleration, and adjusting the pressure of the squeegee to the adhesive sheet based on the theoretical pressure. A method of attaching a protective adhesive sheet as a feature.

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