WO2024195670A1 - Adhesive body attaching device and adhesive body attaching method - Google Patents

Abstract

An adhesive body attaching device (100) for attaching an adhesive body (1) to an object (W) is provided with a trajectory forming section (10) that forms a trajectory of the adhesive body (1) by disposing the adhesive body (1) on the object (W), and a pressing section (50) that presses the adhesive body (1) as a part of the trajectory against the object (W).

Description

Adhesive application device and adhesive application method

The present invention relates to an adhesive application device and an adhesive application method.

Adhesives such as adhesive sheets and tapes are used to bond a variety of adherends, including metal, glass, wood, paper, cardboard, and plastic materials. For example, in the case of a rolled-up form such as a roll of adhesive tape, a base material with a release treatment applied to the back side that comes into contact with the adhesive surface is used to facilitate unwinding.

By the way, there is an application device that applies a thread-like adhesive, which is an adhesive body. The application device described in Patent Document 1 is equipped with a nozzle with an inner wall surface that defines a cylindrical internal space, and the thread-like adhesive is drawn out from the tip of the nozzle through the internal space of the nozzle, and is pressed against an object by the peripheral part that surrounds the tip opening of the nozzle, thereby applying it to the object. Patent Document 2 also discloses a device that applies a filament adhesive to a substrate from a dispenser head.

Japanese Patent Application Publication No. 2021-161404 International Publication No. 2021/124081

The application device described in Patent Document 1 draws out an adhesive body made of a thread-like adhesive from the tip opening of the nozzle and presses the tip of the nozzle against the object to apply it, so it can be applied along any path. However, depending on the size of the nozzle, it may interfere with the object or peripheral equipment, which causes problems with application to narrow areas and application accuracy. In the application device described in Patent Document 1, if the outer diameter of the nozzle is reduced to enable application to narrow areas, the pressure load of the adhesive body on the object decreases, and the adhesive strength decreases. On the other hand, if the inner diameter of the nozzle is reduced to improve application accuracy, the internal space through which the adhesive body passes also becomes smaller, so friction between the inner wall surface of the internal space and the adhesive body increases. Therefore, as the nozzle moves, a peeling force is generated in the adhesive body applied to the object, which peels it off from the object. In addition, in the device described in Patent Document 2, depending on the size of the dispenser head, it may interfere with the object or peripheral equipment, which causes problems with application to narrow areas.

The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide an adhesive application device and adhesive application method that can apply an adhesive with high precision even in narrow areas.

The above object of the present invention can be achieved by the following configuration.
(1) An adhesive attachment device for attaching an adhesive to an object, comprising:
a trajectory forming unit that places the adhesive body on the target object and forms a trajectory of the adhesive body;
A pressing unit that presses the adhesive body, which is a part of the trajectory, against the object;
An adhesive application device comprising:

According to the adhesive application device configured as in (1) above, the adhesive is guided to the target object by the trajectory forming section to form a trajectory of the adhesive, and this trajectory of the adhesive is pressed by the pressing section. In other words, by separating the function of forming the trajectory of the adhesive from the function of pressing the adhesive to the target object, the adhesive can be applied with high precision while suppressing peeling force even in narrow areas, compared to devices that lead the adhesive out of the tip opening of the nozzle and press it against the target object with the tip of the nozzle to apply it.

(2) The adhesive application device described in (1), in which the pressing portion protrudes from the track forming portion by 0.2 mm or more.

According to the adhesive application device configured as in (2) above, the pressing portion protrudes from the path forming portion by 0.2 mm or more, so that the path of the adhesive formed on the target object can be appropriately pressed by the pressing portion, and therefore the adhesive can be applied with high precision while suppressing the peeling force even in narrow areas.

(3) The locus forming portion is groove-shaped.
An adhesive application device as described in (1).

The adhesive application device configured as in (3) above can guide the adhesive to the target object using the groove-shaped track forming section to form a track for the adhesive.

(4) The path forming portion and the pressing portion are provided as separate bodies.
An adhesive application device as described in (1).

The adhesive application device configured as in (4) above has a track forming section and a pressing section as separate bodies, so the material and shape of each section can be appropriately selected depending on the shape of the target object.

(5) The adhesive application device described in (1), in which the pressing unit intermittently presses the adhesive against the target object.

According to the adhesive application device configured as in (5) above, the pressure section intermittently presses the adhesive onto the target object, thereby reducing friction between the pressure section and the adhesive, and allowing the adhesive to be smoothly applied to the target object.

(6) An adhesive application device as described in (1), in which the track forming section and the pressing section are positioned close to each other.

The adhesive application device having the configuration of (6) above allows the pressure unit to press the adhesive onto the target immediately after the track made of the adhesive is formed by the track forming unit. This allows the adhesive to be applied to the target without misalignment even when a curved track is formed.

(7) The adhesive application device described in (1) is provided with a rotation mechanism that rotates the trajectory forming unit, the pressing unit, and the object relative to each other about an axis perpendicular to the object.

The adhesive application device of the above configuration (7) allows the rotation mechanism to rotate the trajectory forming section, the pressing section, and the object relative to each other around an axis perpendicular to the object, making it easy to apply the adhesive to the object along any trajectory, including curved sections.

(8) A linear member for preventing derailment is provided on the outer periphery of the track forming portion.
An adhesive application device as described in (1).

The adhesive application device configured as in (8) above can prevent the adhesive from derailing, improving application accuracy.

(9) The adhesive attachment device according to (1), in which a thread-like adhesive is attached to the object as the adhesive.

The adhesive attachment device having the above-mentioned configuration (9) can attach an adhesive made of a thread-like adhesive to an object with high precision. Therefore, the adhesive can be attached to any desired path with high precision.

(10) A method for attaching an adhesive to the object using an adhesive attachment device according to any one of (1) to (9).

According to the adhesive application method configured as in (10) above, the adhesive is guided to the target object by the trajectory forming section to form a trajectory of the adhesive, and this trajectory of the adhesive is pressed by the pressing section, making it possible to apply the adhesive with high precision even in narrow areas.

The present invention provides an adhesive application device and an adhesive application method that can apply an adhesive with high precision even in narrow areas.

The present invention has been briefly described above. Furthermore, the details of the present invention will become clearer by reading the following description of the mode for carrying out the invention (hereinafter referred to as "embodiment") with reference to the attached drawings.

The present invention has been briefly described above. Furthermore, the details of the present invention will become clearer by reading the following description of the mode for carrying out the invention (hereinafter referred to as "embodiment") with reference to the attached drawings.

FIG. 1 is a schematic diagram of an adhesive body application device according to the present embodiment, as viewed from the side. FIG. 2 is a schematic perspective view of the track forming portion and the pressing portion. FIG. 3 is a schematic cross-sectional view of the track forming portion and the pressing portion taken along the horizontal direction. FIG. 4 is a schematic cross-sectional view of the track forming portion taken along the vertical direction. FIG. 5A is a schematic cross-sectional view of another track forming portion taken along the vertical direction. FIG. 5B is a schematic cross-sectional view of another track forming portion taken along the vertical direction. FIG. 6 is a schematic diagram showing how the path forming portion and the pressing portion are moved along a curve by the rotating mechanism. FIG. 7 is a schematic diagram showing an example of a path of an adhesive body by an adhesive body application device. FIG. 8 is a schematic configuration diagram of a path forming portion and a pressing portion according to the first modification, as viewed from the front. FIG. 9 is a schematic configuration diagram of a track forming portion and a pressing portion according to the first modification, as viewed from the side. FIG. 9 is a schematic configuration diagram of a track forming portion and a pressing portion according to the first modification, as viewed from the bottom. FIG. 11 is a schematic configuration diagram of a path forming portion and a pressing portion according to the second modification, as viewed from the front. FIG. 12 is a schematic configuration diagram of a track forming portion and a pressing portion according to the second modification, as viewed from the side. FIG. 13 is a schematic configuration diagram of a track forming portion and a pressing portion according to the second modification, as viewed from the bottom. FIG. 14 is a schematic configuration diagram of a path forming portion and a pressing portion according to the third modification, as viewed from the front. FIG. 15 is a schematic configuration diagram of a track forming portion and a pressing portion according to the third modification, as viewed from the side. FIG. 16 is a schematic configuration diagram of a track forming portion and a pressing portion according to the third modification, as viewed from the bottom. FIG. 17 shows a schematic diagram of an adhesive body used in an adhesive body application device. FIG. 18 is a schematic cross-sectional view of an adhesive body application device according to Comparative Example 1. As shown in FIG. FIG. 19 is a schematic cross-sectional view of a housing used in the examples. FIG. 20 is a diagram showing a trajectory model used in the examples.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an adhesive substance application device 100 according to this embodiment, as viewed from the side.

As shown in FIG. 1, the adhesive body application device 100 according to this embodiment includes a trajectory forming unit 10 and a pressing unit 50. This adhesive body application device 100 is a device that applies a linear adhesive body 1 to an object W. In FIG. 1, a part of the trajectory forming unit 10 is shown in a see-through manner to show the path of the adhesive body 1, and a part of the pressing unit 50 is shown in a see-through manner to show the configuration of the pressing unit 50. In this specification, the term "linear" is a concept that includes not only straight lines, curved lines, and broken lines, but also a state that can be bent in various directions and angles like a thread (hereinafter also referred to as "thread-like"). This adhesive body application device 100 is mounted as a head on a moving mechanism (not shown), and applies the adhesive body 1 to the object W while moving relatively to the object W placed on a stage S by the moving mechanism.

FIG. 2 is a schematic perspective view of the trajectory forming unit 10 and the pressing unit 50. FIG. 3 is a schematic cross-sectional view of the trajectory forming unit 10 and the pressing unit 50 along the horizontal direction.

As shown in Figures 2 and 3, the adhesive application device 100 comprises a track forming unit 10 and a pressing unit 50 as separate units, and the track forming unit 10 and the pressing unit 50 are located in close proximity to each other. The track forming unit 10 guides the adhesive 1 dispensed from a supply mechanism (not shown) and forms a track of the adhesive 1 on the upper surface of the object W. The pressing unit 50 presses the track made of the adhesive 1 formed by the track forming unit 10 from above, pressing the adhesive 1 against the surface of the object W. In this way, the adhesive 1 forming the track is attached to the surface of the object W.

The trajectory forming part 10 is formed in a plate shape, and its upper part is supported by a support block 11. This trajectory forming part 10 has a groove-shaped guide part 12 on the side facing the target object W. In other words, the trajectory forming part 10 is groove-shaped or slit-shaped. The adhesive body 1 delivered from the supply mechanism is passed through this guide part 12.

The guide section 12 of the trajectory forming section 10 has an introduction section 13 on the side opposite the pressing section 50, and an outlet section 14 on the pressing section 50 side. As the guide section 12 moves downward (downward in the Z direction) from the introduction section 13, it extends obliquely so as to approach one side along the Z direction on the pressing section 50 side, passes through an arc-shaped bottom section 15, and reaches the outlet section 14 at the lower end in the Z direction.

The adhesive body 1 fed from the supply mechanism is fed from the introduction section 13 of the track forming section 10 into the guide section 12. The adhesive body 1 then passes through the arc-shaped bottom section 15 of the guide section 12 and is sent out from the discharge section 14 to the pressing section 50 side.

FIG. 4 is a schematic cross-sectional view of the track forming unit 10 taken along the vertical direction.
As shown in Fig. 4, the track forming part 10 is composed of a main body plate part 10a and a pair of side plate parts 10b attached to both sides of the main body plate part 10a. The side plate parts 10b are attached to the main body plate part 10a so that a part of the edge of the side plate part 10b protrudes from the edge of the main body plate part 10a. As a result, the track forming part 10 has a groove-shaped guide part 12 formed by the main body plate part 10a and the side plate parts 10b protruding from the main body plate part 10a, through which the adhesive body 1 passes.

The track forming section 10 has side plate sections 10b that protrude toward the pressing section 50 relative to the main plate section 10a, and a portion of a pressing pin 51 (described later) of the pressing section 50 is housed between the protruding side plate sections 10b (see FIG. 3). Note that in the track forming section 10, the pair of side plate sections 10b in the portion that does not function as the guide section 12 may or may not protrude from the main plate section 10a.

5A and 5B are schematic cross-sectional views of other track forming units 10 taken along the vertical direction.
As shown in Fig. 5A, the track forming part 10 may be formed by integrally molding a main plate part 10a and a side plate part 10b. Also, as shown in Fig. 5B, the guide part 12 of the track forming part 10 is not limited to a groove shape, and may be a hole part through which the adhesive body 1 can be inserted.

As shown in FIG. 1, the pressing portion 50 has a pressing pin 51, a coil spring 52, and a pressing cam 53.

The pressing pin 51 has a pin portion 55 and a large diameter portion 56. The pressing pin 51 is formed in a rod shape with a circular cross section, and the upper end of the pin portion 55 is the large diameter portion 56. Note that the pressing pin 51 is not limited to a circular cross section, and may be angular in cross section. The large diameter portion 56 is formed with a diameter larger than that of the pin portion 55. The pin portion 55 of the pressing pin 51 is inserted from above into an insertion hole 11a formed in the support block 11. As a result, the pressing pin 51 is supported by the support block 11 so that it can slide in the vertical direction. Furthermore, a portion of the lower end side of the pin portion 55 of the pressing pin 51 is accommodated between the side plate portion 10b that protrudes from the main plate portion 10a of the track forming portion 10 (see Figure 3). The end surface of the pin portion 55 of the pressing pin 51 is a pressing surface 55a, and the end of the pin portion 55 having the pressing surface 55a is disposed adjacent to the lead-out portion 14 of the track forming portion 10. The pressing surface 55a corresponds to the tip (lower end) of the pressing portion 50. The pressing portion 50 protrudes 0.2 mm or more from the track forming portion 10. Specifically, when the pressing pin 51 is pressed down by the cam lobe 62, it protrudes 0.2 mm or more from the lead-out portion 14 of the track forming portion 10. In other words, when the pressing pin 51 is pressed down by the cam lobe 62, the distance between the lead-out portion 14 and the pressing surface 55a is 0.2 mm or more. The lead-out portion 14 corresponds to the tip (lower end) of the track forming portion 10.

The coil spring 52 is inserted onto the pin portion 55 of the pressing pin 51 and is disposed between the large diameter portion 56 of the pressing pin 51 and the support block 11. The pressing pin 51 is biased upward, away from the support block 11, by the elastic force of the coil spring 52.

The pressure cam 53 is provided on the upper part of the pressure pin 51. This pressure cam 53 is supported on a horizontal rotation shaft 61 that is perpendicular to the extension direction of the pressure pin 51. The rotation shaft 61 is the rotation shaft of a drive motor (not shown). In other words, the pressure cam 53 is rotated around the horizontal rotation shaft 61 by being driven by the drive motor. The peripheral surface of this pressure cam 53 is made into a cam surface 53a, and this cam surface 53a is in sliding contact with the end surface of the large diameter portion 56 of the pressure pin 51. This pressure cam 53 has cam lobes 62 that protrude in opposite directions with the center of rotation as a boundary.

In this pressing section 50, the pressing cam 53 is rotated by the drive motor, and when the cam lobe 62 of this pressing cam 53 moves to the end face of the large diameter section 56 of the pressing pin 51, the pressing pin 51 is pressed down by the cam lobe 62 of the pressing cam 53 against the elastic force of the coil spring 52. As a result, the pressing surface 55a of the pin section 55 of the pressing pin 51 presses the adhesive body 1 sent out from the outlet section 14 of the track forming section 10 against the target object W. In addition, when the cam lobe 62 of the rotating pressing cam 53 comes off the end face of the large diameter section 56 of the pressing pin 51, the pressing pin 51 is urged upward by the coil spring 52 and pulled up. As a result, the pressure on the adhesive body 1 by the pressing surface 55a is released. That is, in the pressing unit 50, as the pressing cam 53 rotates, the pressing pin 51 moves back and forth in the vertical direction (the direction of the arrow Z in Figures 1 and 2), and the pressure surface 55a of the pin unit 55 intermittently presses the adhesive body 1 against the target object W.

In the above-mentioned adhesive application device 100, at least the contact points of the track forming section 10 and the pressing section 50 with the adhesive 1 are made of, for example, at least one of fluororesin, silicone resin, and polyolefin resin. Alternatively, at least the contact points of the track forming section 10 and the pressing section 50 with the adhesive 1 are non-adhesively treated, for example, with at least one of fluororesin coating, silicone coating, long-chain alkyl coating, and Tosycal (registered trademark) coating. Treatment with fluororesin coating includes treatment with fluororesin heat shrink tubing and fluororesin fabric sheet. Alternatively, at least the contact points of the track forming section 10 and the pressing section 50 with the adhesive 1 may be made of a base material that has been subjected to various non-adhesive treatments. For example, the base material may be roughened by blasting and the recesses may be coated with a non-adhesive substance, or it may be treated with a PEEK (polyether ether ketone) coating, fluorine composite electroless nickel plating (fine particles of fluororesin are dispersed and co-deposited in an electroless nickel plating film), Byceram (a fluororesin coating containing fine ceramic particles), FRP (Fiber Reinforced Plastics) lining, ultra-high molecular weight PE (polyester) lining, etc.

The adhesive application device 100 is equipped with a rotation mechanism (not shown). This rotation mechanism rotates the trajectory forming unit 10 and the pressing unit 50 around an axis AX perpendicular to the object W on the stage S (see FIG. 1). In other words, the rotation mechanism rotates the trajectory forming unit 10 and the pressing unit 50 around the axis AX perpendicular to the object W on the stage S. In this example, a rotation mechanism is mounted on a head having the trajectory forming unit 10 and the pressing unit 50, making the head rotatable around the axis AX. The head having the rotation mechanism allows the adhesive 1 to be applied along a path including a curved portion while the position of the object is fixed.

FIG. 6 is a schematic diagram showing how the path forming unit 10 and the pressing unit 50 are moved along a curve by the rotating mechanism.
6, in the adhesive body application device 100, the trajectory forming unit 10 and the pressing unit 50 are moved by the moving mechanism along the upper surface of the object W with the trajectory forming unit 10 facing forward. At this time, when rotated by the rotating mechanism about an axis AX perpendicular to the object W, the trajectory forming unit 10 and the pressing unit 50 are moved in an arc-shaped trajectory relative to the object W. In this way, by relatively rotating the trajectory forming unit 10 and the pressing unit 50 and the object W about the axis AX perpendicular to the object W by the rotating mechanism, the adhesive body 1 can be easily applied to the object W in any trajectory.

The adhesive application device 100 also includes a cutting mechanism (not shown). The cutting mechanism includes, as an example, a gripping section and a cutting section driven by a driving means. When the application of the adhesive body 1 to the object W is completed, for example, between the track forming section 10 and the pressing section 50, the gripping section chucks the adhesive body 1, and then the cutting section cuts the adhesive body 1 chucked by the gripping section. The gripping section and the cutting section of the cutting mechanism only need to hold and cut the adhesive body 1 at a set position, and the shape and driving method are not limited. For example, the driving means for these gripping sections and cutting sections include an air cylinder and a motor. In addition, the cutting section may be, for example, a pair of blades (double-edged) such as scissors or pliers that clamp and cut the adhesive body 1, a cutter that pushes through the adhesive body 1 with one blade (single-edged), a heat cutter that burns off the adhesive body 1 with heat, or an ultrasonic cutter that cuts the adhesive body 1 with ultrasonic vibration. Furthermore, if the cutting mechanism is a single-edged cutting section, the adhesive body 1 can be cut by pressing the single blade against the target object without providing a gripping section.

The adhesive body application device 100 configured as described above is equipped with a control unit (not shown), which controls each drive unit. The control unit controls the drive units of the adhesive body application device 100 according to a program, and applies the adhesive body 1 to the object W. Below, a case where the adhesive body application device 100 applies the adhesive body 1 to the object W will be described.

First, the object W is placed on the stage S, and the pressing pin 51 of the pressing unit 50 of the adhesive body application device 100 is placed at the application start position. At the start of operation, in the adhesive body application device 100, the adhesive body 1 that has been fed from the supply mechanism and passed through the guide unit 12 of the track forming unit 10 is placed under the pressing surface 55a of the pressing pin 51 of the pressing unit 50.

Next, the adhesive application device 100 is operated. Then, the control unit controls the movement mechanism and the rotation mechanism according to the program, the track forming unit 10 and the pressing unit 50 are moved, the drive motor of the pressing unit 50 is driven, and the pressing pin 51 moves up and down by the pressing cam 53.

As a result, the adhesive body 1 being fed out is guided in the direction of movement by the trajectory forming unit 10, the adhesive body 1 is placed on the top surface of the object W along the direction of movement, and a trajectory of the adhesive body 1 is formed. Then, immediately after the trajectory of the adhesive body 1 formed by the trajectory forming unit 10 is intermittently pressed against the object W by the pressing surface 55a of the pressing pin 51 which moves up and down intermittently. Therefore, the adhesive body 1 is attached to the object W along a trajectory based on the program.

Once the adhesive body 1 has been attached to the object W, the adhesive body 1 is cut by the cutting mechanism, and the attachment of the adhesive body 1 to the object W is completed.

FIG. 7 is a schematic diagram showing an example of a path of the adhesive body 1 by the adhesive body application device 100. As shown in FIG.
7, according to the adhesive body application device 100, the trajectory of the adhesive body 1 formed by the trajectory forming unit 10 is intermittently pressed against the object W by the pressing unit 50 to form pressure-bonding points P. By continuously forming pressure-bonding points P in this manner, the adhesive body 1 can be attached to the object W along a path having a straight line portion SL, a direction change portion CD, and a curved portion CL. This allows various characters, patterns, and the like to be drawn on the object W by the adhesive body 1.

In this way, according to the adhesive application device 100 and adhesive application method of the above embodiment, the adhesive 1 is guided to the object W by the trajectory forming unit 10 to form a trajectory of the adhesive 1, and this trajectory of the adhesive 1 is pressed by the pressing unit 50. In other words, by separating the function of forming the trajectory of the adhesive 1 from the function of pressing the adhesive 1 to the object W, the adhesive 1 can be applied with high precision while suppressing peeling force even in narrow areas, compared to an application device that draws the adhesive 1 out from the tip opening of the nozzle and presses it against the object W with the tip of the nozzle. This makes it possible to apply, for example, an adhesive 1 with a width of 1 mm or less with high precision, which is difficult to achieve with a device that draws the adhesive 1 out from the tip opening of the nozzle and applies it to the object W.

Moreover, the pressing part 50 intermittently presses the adhesive body 1 against the object W, so friction between the pressing part 50 and the adhesive body 1 is reduced, and the adhesive body 1 can be smoothly attached to the object W.

Furthermore, immediately after the path made of the adhesive body 1 is formed by the path forming unit 10, the pressing unit 50 can press the adhesive body 1 onto the object W. This allows the adhesive body 1 to be attached to the object W without misalignment even when a curved path is formed.

The adhesive body application device 100 according to the above embodiment includes a track forming section 10 formed in a plate shape, and a pressing section 50 having a pressing pin 51 that can slide vertically relative to the track forming section 10, but the configuration of the track forming section and the pressing section is not limited to this. Below, the differences between the adhesive body application device 100 and the adhesive body application device 100A, 100B, and 100C according to Modifications 1 to 3 will be described.

(Variation 1)
8 to 10 are schematic configuration diagrams of the path forming section and the pressing section according to the first modified example, with FIG. 8 being a front view, FIG. 9 being a side view, and FIG. 10 being a bottom view.

As shown in Figures 8 to 10, the adhesive body application device 100A has a trajectory forming unit 10A and a pressing unit 50A instead of the trajectory forming unit 10 and pressing unit 50 of the adhesive body application device 100.

The adhesive attachment device 100A has a track forming unit 10A and a pressing unit 50A as separate units, and the track forming unit 10A and the pressing unit 50A are disposed in close proximity to each other. The pressing unit 50A is fixed to a part of the track forming unit 10A.

The trajectory forming part 10A has a cylindrical main body 11A and a tapered tip 11A1 at one end of the main body 11A. The trajectory forming part 10A has a groove-like guide part 12A formed from one end of the main body 11A to the tip 11A1. In other words, the trajectory forming part 10A is groove-like or slit-shaped. The adhesive 1 delivered from the supply mechanism is passed through this guide part 12A.

The guide portion 12A of the trajectory forming portion 10A has an introduction portion 13A located on the outer peripheral surface of the main body portion 11A, and an outlet portion 14A located on the tip surface 11Aa, which is the lower end surface of the tip portion 11A1. As the guide portion 12A moves downward (downward in the Z direction) from the introduction portion 13A, it extends obliquely so as to approach the pressing portion 50A, passing through an arc-shaped bottom portion and reaching the outlet portion 14A.

As shown in Figures 8 to 10, the pressing portion 50A protrudes downward (downward in the Z direction) from the tip surface 11Aa of the tip portion 11A1, which is part of the trajectory forming portion 10A. The pressing portion 50A has a rectangular or cylindrical shape, such as a triangular, rectangular or pentagonal prism, with rounded end faces. The end surface of the pressing portion 50A is the pressing surface 50Aa. The pressing surface 50Aa corresponds to the tip (lower end) of the pressing portion 50A. The pressing portion 50A protrudes 0.2 mm or more from the trajectory forming portion 10A. The pressing portion 50A protrudes 0.2 mm or more from the lead-out portion 14A of the trajectory forming portion 10A. In other words, the distance between the lead-out portion 14A and the pressing surface 50Aa is 0.2 mm or more. The lead-out portion 14A corresponds to the tip (lower end) of the trajectory forming portion 10A.

The trajectory forming unit 10A and the pressing unit 50A of the first modification are moved in the vertical direction by, for example, a linear motion mechanism provided above the main body unit 11A.

In the adhesive application device 100A of the first modification, the movement mechanism and rotation mechanism are controlled by the control unit according to a program, and the track forming unit 10A and the pressing unit 50A are moved horizontally and are also moved vertically by a linear motion mechanism or the like provided in the main body unit 11A.

According to the adhesive application device 100A of the first modified example, the adhesive 1 dispensed from the supply mechanism is guided in the movement direction by the trajectory forming unit 10A, the adhesive 1 is placed on the top surface of the object W along the movement direction, and a trajectory of the adhesive 1 is formed. Then, immediately after the trajectory of the adhesive 1 formed by the trajectory forming unit 10A is intermittently pressed against the object W by the pressing surface 50Aa of the pressing unit 50A, which moves up and down intermittently. Therefore, the adhesive 1 is attached to the object W along a trajectory based on the program.

(Variation 2)
11 to 13 are schematic configuration diagrams of a path forming section and a pressing section according to the second modified example, with FIG. 11 being a front view, FIG. 12 being a side view, and FIG. 13 being a bottom view.

As shown in Figs. 11 to 13, the adhesive body application device 100B has a trajectory forming unit 10 in place of the trajectory forming unit 10 of the adhesive body application device 100. The pressing unit 50 of the second modification is the same as the pressing unit 50 shown in Fig. 1.

The adhesive attachment device 100B has a track forming unit 10 and a pressing unit 50 as separate units, and the track forming unit 10B and the pressing unit 50 are positioned close to each other.

The track forming part 10B has a plate-shaped main body 11B, the upper part of which is supported by the support block 11 shown in FIG. 1. The main body 11B has a groove-shaped guide part 12B on one end. In other words, the track forming part 10B is groove-shaped or slit-shaped. The adhesive body 1 delivered from the supply mechanism is passed through this guide part 12B.

The guide portion 12B of the trajectory forming portion 10B has an introduction portion 13B on the side opposite the pressing portion 50, and an outlet portion 14B on the pressing portion 50B side. The guide portion 12B extends diagonally downward (downward in the Z direction) from the introduction portion 13B slightly in the width direction of the main body portion 11B (left-right direction in FIG. 12), for example to a position that is about 10% of the width direction of the main body portion 11B, passes through an arc-shaped bottom, and extends horizontally below the main body portion 11B to reach the outlet portion 14B.

As shown in Figures 11 to 13, the pressing portion 50 has an end surface that serves as a pressing surface 55a. The pressing surface 50a corresponds to the tip (lower end) of the pressing portion 50. The pressing portion 50 protrudes 0.2 mm or more from the path forming portion 10B. Specifically, when the pressing portion 50 is pressed down by the cam lobe 62, it protrudes 0.2 mm or more from the lead-out portion 14B of the path forming portion 10B. In other words, when the pressing pin 51 is pressed down by the cam lobe 62, the distance between the lead-out portion 14B and the pressing surface 55a is 0.2 mm or more. The lead-out portion 14B corresponds to the tip (lower end) of the path forming portion 10B.

In the adhesive application device 100B of the second modification, the moving mechanism and the rotating mechanism are controlled by the control unit according to a program, the track forming unit 10B and the pressing unit 50 are moved horizontally, the drive motor of the pressing unit 50 is driven, and the pressing pin 51 moves up and down by the pressing cam 53.

According to the adhesive application device 100B of the second modified example, the adhesive 1 dispensed from the supply mechanism is guided in the movement direction by the trajectory forming section 10B, the adhesive 1 is placed on the top surface of the object W along the movement direction, and a trajectory of the adhesive 1 is formed. Then, immediately after the trajectory of the adhesive 1 formed by the trajectory forming section 10B is intermittently pressed against the object W by the pressing surface 55a of the pressing section 50, which moves up and down intermittently. Therefore, the adhesive 1 is attached to the object W along a trajectory based on the program.

(Variation 3)
14 to 16 are schematic configuration diagrams of the path forming portion and the pressing portion according to the modified example 3, with FIG. 14 being a front view, FIG. 15 being a side view, and FIG. 16 being a bottom view.

As shown in Figures 14 to 16, the adhesive body application device 100C has a track formation unit 10C and a pressing unit 50C instead of the track formation unit 10 and pressing unit 50 of the adhesive body application device 100, and a linear member 20 is provided on the outer periphery of the track formation unit 10C to prevent derailment.

The adhesive attachment device 100C has a track forming unit 10C and a pressing unit 50C as separate units, and the track forming unit 10C and the pressing unit 50C are positioned close to each other. The pressing unit 50C is fixed to a part of the track forming unit 10C.

The trajectory forming part 10C has a cylindrical main body 11C and has a tapered tip 11C1 at one end of the main body 11C. The tip 11C1 has a constricted portion 11C2 slightly below the center in the Z direction. The trajectory forming part 10C has a groove-shaped guide portion 12C formed from one end of the main body 11C through the constricted portion 11C2 to the tip 11C1. In other words, the trajectory forming part 10C is groove-shaped or slit-shaped. A linear member 20 for preventing derailment is inserted into the constricted portion 11C2. The linear member 20 is preferably composed of at least one of fluororesin, silicone resin, and polyolefin resin. The adhesive body 1 fed from the supply mechanism is passed through this guide portion 12C. In the constricted portion 11C2, the adhesive body 1 is passed between the linear member 20 and the bottom of the guide portion 12C. In this example, the linear member 20 is an O-ring, but is not limited to this. The linear member only needs to be prevented from detaching from the guide portion by passing an adhesive between the linear member and the guide portion, and the overall shape and cross-sectional shape of the linear member are not important.

The guide portion 12C of the trajectory forming portion 10C has an introduction portion 13C located on the outer peripheral surface of the main body portion 11C, and an outlet portion 14C located on the tip surface 11Ca, which is the lower end surface of the tip portion 11C1. The guide portion 12C extends diagonally downward (downward in the Z direction) from the introduction portion 13C slightly in the radial direction of the main body portion 11C (left-right direction in FIG. 15), for example to a position of about 10% of the radius of the main body portion 11C. The guide portion 12C then extends along the outer peripheral surface of the tip portion 11C1 from the upper end of the tip portion 11C1, through the constriction portion 11C2 to the tip surface 11Ca, and reaches the outlet portion 14C.

As shown in Figures 14 to 16, the pressing portion 50C protrudes downward (downward in the Z direction) from the tip surface 11Ca of the tip portion 11C1, which is a part of the trajectory forming portion 10C. The pressing portion 50C has a rectangular column shape with rounded end surfaces. The end surface of the pressing portion 50C is the pressing surface 50Ca. The pressing surface 50Ca corresponds to the tip (lower end) of the pressing portion 50C. The pressing portion 50C protrudes 0.2 mm or more from the trajectory forming portion 10C. The pressing portion 50C protrudes 0.2 mm or more from the lead-out portion 14C of the trajectory forming portion 10C. In other words, the distance between the lead-out portion 14C and the pressing surface 50Ca is 0.2 mm or more. The lead-out portion 14C corresponds to the tip (lower end) of the trajectory forming portion 10C.

The trajectory forming unit 10C and the pressing unit 50C of the third modification are moved in the vertical direction by, for example, a linear motion mechanism provided above the main body unit 11C.

In the adhesive application device 100C of the third modification, the movement mechanism and rotation mechanism are controlled by the control unit according to a program, and the track forming unit 10C and the pressing unit 50C are moved horizontally and are also moved vertically by a linear motion mechanism or the like provided above the main body unit 11C.

According to the adhesive application device 100C of the third modified example, the adhesive 1 dispensed from the supply mechanism is guided in the movement direction by the trajectory forming section 10C, the adhesive 1 is placed on the top surface of the object W along the movement direction, and a trajectory of the adhesive 1 is formed. Then, immediately after the trajectory of the adhesive 1 formed by the trajectory forming section 10C is intermittently pressed against the object W by the pressing surface 50Ca of the pressing section 50C, which moves up and down intermittently. Therefore, the adhesive 1 is attached to the object W along a trajectory based on the program.

Also, the adhesive body application device 100 can be used by using a multi-axis articulated robot with, for example, 4 axes, 6 axes, 12 axes, etc. as a moving mechanism, and attaching it as a head to the tip of the arm of this articulated robot. Furthermore, the adhesive body application device 100 can be used by using a three-axis stage, which is provided in a three-dimensional embroidery machine or 3D printer, etc., and moves the stage and head relatively in three dimensions, as a moving mechanism, and attaching it as a head to this three-axis stage. Even when such an articulated robot or three-axis stage is used as a moving mechanism, the adhesive body application device 100 according to this embodiment can intermittently press the adhesive body 1 against the object W with the pressing unit 50 to apply it well. Therefore, the adhesive body 1 can be smoothly applied to the surface of even a three-dimensional object W.

In the above embodiment, the case where the trajectory forming unit 10 and the pressing unit 50 are rotated around the axis AX perpendicular to the object W by the rotating mechanism is illustrated, but the stage S on which the object W is placed may be provided with a rotating mechanism. In this case, the stage S is rotated by the rotating mechanism, so that the adhesive body 1 can be easily attached to the object W in any trajectory. Also, a rotating mechanism for rotating the trajectory forming unit 10 and the pressing unit 50 and a rotating mechanism for rotating the stage S may be provided. In this case, the path of the adhesive body 1 relative to the object W can be changed more quickly by rotating the trajectory forming unit 10 and the pressing unit 50 and the stage S by these rotating mechanisms. Also, the operator may rotate the object W on the stage S to form a trajectory of the adhesive body 1 in any path relative to the object W.

The track forming unit 10 and the pressing unit 50 may also be positioned apart. If the track to be formed is a straight line or a curved line with a small curvature, the adhesive body 1 is less likely to shift in position even if the pressing unit 50 does not press immediately after the track is formed by the track forming unit 10. Therefore, even if the track forming unit 10 and the pressing unit 50 are positioned apart and pressing occurs with a delay from the time the track is formed, application accuracy can be maintained.

In addition, in the pressing unit 50, the member that presses the adhesive body 1 against the target object W is not limited to the rod-shaped pressing pin 51, but may be, for example, a rotatably supported roller.

FIG. 17 is a schematic diagram of the adhesive body 1 used in the adhesive body application device 100 of the above embodiment.
As shown in Fig. 17, the adhesive body 1 is a thread-like adhesive body consisting of a linear core material 1a and an adhesive layer 1b that covers the longitudinal surface of the core material 1a, and has a long linear shape. The term "linear" as used here is a concept that includes not only straight lines, curved lines, and bent lines, but also a state in which the adhesive body can be bent in various directions and angles like a thread (i.e., thread-like). The adhesive layer 1b in this specification also includes a linear shape.

Note that, although the cross-sectional shape of the adhesive body 1 in this configuration example is circular, this embodiment is not limited to this, and the cross-sectional shape can be circular, as well as elliptical, rectangular, or other shapes.

The adhesive layer 1b includes an adhesive formed from an adhesive composition. The adhesive is not particularly limited as long as it satisfies the above gel fraction and the change in gel fraction, and known adhesives can be used. Examples include acrylic adhesives, rubber adhesives, vinyl alkyl ether adhesives, silicone adhesives, polyester adhesives, polyamide adhesives, urethane adhesives, fluorine adhesives, and epoxy adhesives. Among them, from the viewpoint of adhesion, acrylic adhesives, urethane adhesives, silicone adhesives, rubber adhesives, and polyester adhesives are preferred, and acrylic adhesives are particularly preferred. Note that only one type of adhesive may be used alone, or two or more types may be used in combination. In addition, the adhesive in this embodiment is preferably a pressure-sensitive adhesive that has adhesion at room temperature and can attach an adherend to its surface by the pressure generated when the surface of the adhesive and the surface of the adherend come into contact with each other. If it is a pressure-sensitive adhesive, it does not require heating and can be applied to adherends that are sensitive to heat.

The adhesive may be either a solvent-based adhesive or a water-dispersed adhesive, and preferably one in which crosslinking proceeds as the adhesive composition dries (solvent volatilization) and is quickly completed after drying. This is because new crosslinking is not increased after the surfaces of the adhesive layer 1b come into contact with each other. Here, water-dispersed adhesives are preferred, and water-dispersed acrylic adhesives are more preferred, as they allow high-speed application, are environmentally friendly, and have little effect (swelling, dissolution) on the substrate and core material 1a due to the solvent.

Here, in the adhesive body 1 having the core material 1a, the adhesive layer 1b may cover the entire surface (surface in the longitudinal direction) of the core material 1a, or may cover only at least a portion of the surface of the core material 1a. Also, the adhesive layer 1b is typically formed continuously, but is not limited to such a form, and may be formed in a regular or random pattern such as dots or stripes. The end surface of the core material 1a may or may not be covered by the adhesive layer 1b. For example, if the adhesive body 1 is cut during the manufacturing process or during use, the end surface of the core material 1a may not be covered by the adhesive layer 1b.

The core material 1a used in the adhesive body 1 may be, for example, a resin, rubber, a foam, an inorganic fiber, or a composite of these. Examples of resins include polyolefins such as polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer; polyesters such as polyethylene terephthalate (PET); vinyl chloride resins; vinyl acetate resins; polyimide resins; polyamide resins; and fluororesins. Examples of rubbers include synthetic rubbers such as natural rubber and urethane rubber. Examples of foams include polyurethane foam and polychloroprene rubber foam. Examples of fibers include glass fiber, carbon fiber, metal fiber, chemical fibers (recycled fibers, semi-synthetic fibers, synthetic fibers, etc.), and natural fibers (plant fibers, animal fibers, etc.). The cross-sectional shape of the core material 1a is not particularly limited, but it usually has a cross-sectional shape that corresponds to the cross-sectional shape of the adhesive body 1.

The material of the thread-like core material 1a that can be used in the adhesive body 1 can be various polymeric materials such as rayon, cupra, acetate, promix, nylon, aramid, vinylon, vinylidene, polyvinyl chloride, polyester, acrylic, polyethylene, polypropylene, polyurethane, polychlar, polylactic acid, etc., glass, carbon fiber, various rubbers such as synthetic rubbers such as natural rubber and polyurethane, natural materials such as cotton, wool, etc., metals, etc. In addition, the form of the thread-like core material 1a can be, for example, monofilament, multifilament, spun yarn, processed yarns that have been subjected to shrink processing or bulk processing, etc., generally called textured yarns, bulky yarns, stretch yarns, or yarns that are combined by twisting these together. In addition, the cross-sectional shape can be not only circular, but also rectangular yarns such as squares, star-shaped yarns, oval shapes, hollow yarns, etc.

The core material 1a may contain various additives such as fillers (inorganic fillers, organic fillers, etc.), anti-aging agents, antioxidants, UV absorbers, antistatic agents, lubricants, plasticizers, colorants (pigments, dyes, etc.), etc., as necessary. The surface of the core material 1a may be subjected to a known or conventional surface treatment, such as a corona discharge treatment, a plasma treatment, or application of a primer.

The cross-sectional size of the core material 1a is not particularly limited and can be selected appropriately depending on the purpose, but for example, if the cross-sectional shape is circular, from the viewpoint of handleability (flexibility, resistance to cutting), the diameter is preferably 1 μm to 2000 μm, and more preferably 10 μm to 1000 μm.

The thickness of the adhesive layer 1b is not particularly limited, but from the viewpoint of adhesiveness, it is preferably, for example, 1 μm or more, and more preferably 3 μm or more. From the viewpoints of thickness unevenness and drying properties, it is preferably, for example, 200 μm or less, and more preferably 150 μm or less. Furthermore, it can be made thicker by laminating depending on the application.

In particular, the adhesive body 1 is preferably a pressure-sensitive adhesive body in which the adhesive forming the adhesive layer 1b has adhesiveness at room temperature and can attach the adherend to its surface by the pressure generated when the adhesive surface comes into contact with the surface of the adherend. A pressure-sensitive adhesive body does not require heating and can be applied to adherends that are sensitive to heat.

As mentioned above, the shape of the adhesive body 1 is not particularly limited, but the greater the ratio (longest axis among the axes passing through the center of gravity of the cross section) of the length of the long axis (longest axis among the axes passing through the center of gravity of the cross section) to the length of the short axis (shortest axis among the axes passing through the center of gravity of the cross section) in the cross-sectional shape of the adhesive body 1 (longest axis/short axis), the flatter the shape of the adhesive body 1 will be. On the other hand, the smaller this ratio is, the closer the cross-sectional shape of the adhesive body 1 will be to a circle, and this ratio will be at its minimum value of 1 when the cross-sectional shape is circular. A minimum value of 1 also includes special shapes such as triangles, stars, etc.

The adhesive body 1 may have a release liner. When the adhesive body 1 has a release liner, the release liner may be peeled off from the adhesive layer 1b before the adhesive body 1 reaches the track forming portion 10 or the like, or the release liner may be peeled off after attachment, and either way the adhesive body 1 can be attached to the object W. By having the adhesive body 1 have a release liner, the self-adhesive force of the adhesive body 1 can be reduced, so that the adhesive body 1 can be pressed against the object W with the tension of the adhesive body 1 reduced. Therefore, the adhesive body 1 pressed against the object W can be prevented from coming off, breaking, or re-adhering and becoming tangled due to tension, and the adhesive body 1 can be smoothly attached.

The embodiments and methods of use of the adhesive body 1 are roughly classified into the following four patterns. The non-adhesive layer here is a layer that covers the surface (surface in the longitudinal direction) of the adhesive body 1, and includes layers that cover the adhesive body 1 in the initial state before stretching, but are broken when the adhesive body 1 is stretched, thereby revealing the adhesiveness of the adhesive body 1. However, there are no particular limitations on the type or material of the non-adhesive layer.

1) Pressing the adhesive body without a non-adhesive layer
2) Adhesive body without a non-adhesive layer + release liner (the release liner is peeled off before or after bonding)
3) Adhesive body coated with a non-adhesive layer 4) Adhesive body coated with a non-adhesive layer + release liner (the release liner is peeled off before or after compression)
With regard to 2) or 4) above, an example in which the release liner is peeled off after compression is when the release liner is peeled off after the adhesive body is attached to a first object and before being attached to a second object.

Furthermore, the adhesive body 1 of this embodiment is bendable and thread-like, so that it can be bent in various directions and angles like a thread. In addition to the effects described above, the bendable adhesive body 1, particularly the thread-like adhesive body 1, has the advantage of being easily applicable to complex shapes such as curves, curved surfaces, and uneven surfaces.

For example, when applying adhesive tape to an adherend having parts with complex shapes such as curves, curved surfaces, and unevenness, wrinkles and overlaps will occur in the adhesive tape in those parts, making it difficult to apply neatly while preventing overflow, and wrinkles and overlaps may also cause the adhesive strength to decrease. In addition, in order to apply adhesive tape without wrinkles and overlaps, it is possible to cut the adhesive tape into small pieces while applying it, but this would significantly reduce workability. On the other hand, if the adhesive body 1 has bendability, and in particular the adhesive body 1 is thread-shaped, it can be firmly applied without wrinkles or overlaps even when applied to parts with complex shapes such as curves, curved surfaces, and unevenness. Furthermore, since such adhesive body 1 can be applied to the part to be applied at once, i.e., in one process, it is easy to work with and can be applied to an automated line.

Specific examples of applications of the thread-like adhesive body 1 include applications for fixing cables such as electric wires and optical fibers, LED fiber lights, optical fiber sensors such as FBG (Fiber Bragg Gratings), various wires (linear members) such as threads, strings, and wires, and thin members in a desired shape. For example, even when a wire or thin member is fixed to another member in a complex shape, the thread-like adhesive body 1 can be used to firmly fix the wire or thin member with excellent workability while suppressing protrusion, wrinkles, and overlaps in accordance with the complex shape that the wire or thin member should have. In addition, when fixing a wire or thin member to another member, the thread-like adhesive body 1 can be attached in advance to the surface of the other member in accordance with the shape in which the wire or thin member should be fixed, and then the wire or thin member can be attached to the adhesive body 1 attached to the surface of the other member. Alternatively, the thread-like adhesive body 1 may be attached to a wire or a narrow member, and then the wire or narrow member may be fixed to another member in a desired configuration.

The thread-like adhesive body 1 can also be suitably used for the purpose of temporarily fixing (temporarily fastening) an article, for example, to the surface of another article. More specifically, the thread-like adhesive body 1 is particularly suitable for use in the temporary fixing (temporarily fastening) of textile products such as clothing, shoes, bags, and hats, and leather products, etc., during their manufacture. However, the uses are not limited to these, and the thread-like adhesive body 1 can be suitably used for various applications in which temporary fixing (temporarily fastening) is desired.

For example, when fixing one article to the surface of another article, the first article is temporarily fixed to the surface of the other article using the thread-like adhesive body 1 to position it, and then both articles are fixed (mainly fixed) by a fixing method such as thermocompression or sewing. In this case, if the thread-like adhesive body 1 is used, it is easy to temporarily fix the two articles while avoiding the fixing part provided between them. For example, when sewing textile products or leather products, if temporary fixing is performed using the thread-like adhesive body 1, it is easy to temporarily fix the articles while avoiding the sewing part, and it is easy to prevent the adhesive from adhering to the needle.

Furthermore, as mentioned above, if the adhesive material 1 is in the form of a thread, it can be satisfactorily attached to both objects while minimizing overhang, wrinkles, and overlaps, even if the objects have complex shapes such as curves, curved surfaces, or uneven surfaces, and it can be attached in a single process, making it easy to work with.

In addition, even for materials that are easily deformed, such as fabric, cloth, leather, etc. that make up textile or leather products, temporary fixation with the thread-like adhesive body 1 can suppress or prevent deformation of the material due to tension, resulting in good design after fixation (full fixation).

Furthermore, if the adhesive thread 1 is in the form of a thread, after the two articles have been fixed (full-fixed), it is easy to remove the adhesive thread 1 from between the two fixed (full-fixed) articles as necessary. This prevents the adhesive from spilling out, and effectively prevents deterioration of the design caused by discoloration of the remaining adhesive over time.

Furthermore, if the adhesive body 1 is in the form of a thread, it can be twisted together with threads made of other materials to form a combined thread, or woven with threads or fabrics (including nonwoven fabrics and sheets) made of other materials, thereby enabling the functionality to be multiplied.

Furthermore, the thread-like adhesive can be used as a dam material to prevent the adhesive or pressure-sensitive adhesive from spilling out when the adhesive or pressure-sensitive adhesive is applied to the object to be bonded (adherend). The dam material can be used, for example, to prevent the sealing resin used in bonding optical panels from spilling out. When using the thread-like adhesive as a dam material, the thread-like adhesive can be peeled off after the adhesive or pressure-sensitive adhesive has hardened, or it can be left in place.

The present invention is not limited to the above-mentioned embodiment, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-mentioned embodiment are arbitrary and not limited as long as they can achieve the present invention. In the above-mentioned embodiment, an example in which the adhesive body attachment device 100 attaches a thread-like adhesive body 1 is shown, but the adhesive body is not limited to being thread-like. The adhesive body attachment device 100 may attach an adhesive body 1 having a long and flat shape. As described above, the larger the ratio of the length of the long axis to the length of the short axis in the cross-sectional shape of the adhesive body 1, the flatter the adhesive body 1 will be. A typical example of an adhesive body 1 having a flat shape is an adhesive tape, in which an adhesive layer is provided on one or both sides of a core material. The adhesive tape preferably has a release liner that covers at least a part of the adhesive layer. When an adhesive body having a release liner is used, the release liner is peeled off from the adhesive layer before or after the adhesive body is attached to the target object.

Here, the features of the adhesive body attachment device and adhesive body attachment method according to the above-mentioned embodiment of the present invention will be briefly summarized and listed below in [1] to [10].
[1] An adhesive attachment device (100) for attaching an adhesive (1) to an object (W), comprising:
a trajectory forming unit (10) that places the adhesive body (1) on the object (W) and forms a trajectory of the adhesive body (1);
a pressing unit (50) that presses the adhesive body (1), which is a part of the trajectory, against the object (W);
An adhesive application device comprising:
[2] The pressing portion (50) protrudes from the track forming portion (10) by 0.2 mm or more.
The adhesive application device according to [1].
[3] The track forming portion (10) is groove-shaped.
The adhesive application device according to [1] or [2].
[4] The path forming portion (10) and the pressing portion (50) are provided as separate bodies.
The adhesive attachment device according to any one of [1] to [3].
[5] The adhesive body application device according to any one of [1] to [4], wherein the pressing unit (50) intermittently presses the adhesive body (1) against the object (W).
[6] The adhesive body application device according to any one of [1] to [5], wherein the track forming portion (10) and the pressing portion (50) are disposed in close proximity to each other.
[7] The adhesive application device according to any one of [1] to [6], further comprising a rotation mechanism that rotates the trajectory forming unit (10), the pressing unit (50), and the object (W) relatively around an axis (AX) perpendicular to the object (W).
[8] A linear member for preventing derailment is provided on the outer periphery of the track forming portion (10).
The adhesive attachment device according to any one of [1] to [7].
[9] The adhesive body attachment device according to any one of [1] to [4], in which a thread-like adhesive body is attached to the object (W) as the adhesive body (1).
[10] A method for attaching an adhesive body, comprising attaching the adhesive body (1) to the object (W) using the adhesive body attachment device (100) described in any one of [1] to [9].

(Painting evaluation)
The thread-like adhesive was applied to the object W using an adhesive application device, and the ability to apply it to the grooves and the accuracy of application to the curved lines were evaluated. The evaluation was carried out for Examples 1 to 4 and Comparative Examples 1 to 3, in which the thread-like adhesive was applied to the object under various application conditions using adhesive application devices with different dimensions, shapes, and differences between the width of the path-forming part and the width of the thread-like adhesive, respectively. The setting conditions for the adhesive application device (path-forming part and pressing part) and the evaluation results are shown in Table 1.

(Evaluation of attachment to grooves)
In Example 1, a housing made of ABS (acrylonitrile-butadiene-styrene copolymer) shown in FIG. 19 was used as the subject. The housing shown in FIG. 19 has a groove with a width of 1 mm, a depth of 1 mm, and a length of 100 mm. A 50 mm long string of adhesive with a width of 0.45 mm was attached to the bottom surface of the groove of this housing using adhesive body attachment device 100A (see FIGS. 8 to 10). The appearance was evaluated visually, and it was judged as OK if the 50 mm long string of adhesive was attached to the bottom surface of the groove, and NG if even a part of it was attached to the wall surface or floated. Example 2 used adhesive body application device 100 (see Figures 1 to 4), Example 3 used adhesive body application device 100C (see Figures 11 to 13), Example 4 used adhesive body application device 100C (see Figures 14 to 16), Comparative Example 1 used adhesive body application device 1100 (see Figure 18), Comparative Example 2 used an adhesive body application device 100 having no pressing section 50 but a track forming section 10, and Comparative Example 3 used an adhesive body application device 100 having no track forming section 10 but a pressing section 50. Except for these, the same operations and evaluations were carried out as in Example 1.

(Attachment accuracy of curved sections)
A trajectory model with a curve R = 5 mm shown in Figure 20 was prepared. In Example 1, a thread-like adhesive with a width of 0.45 mm was applied to the trajectory model using the adhesive body application device 100. Application was started from point P1 shown in Figure 20, and application was performed up to point P2 at an application speed of 30 mm/sec. The application accuracy was analyzed by superimposing the trajectory model and the sample that was actually applied, and measuring the amount of deviation between the trajectory model and the actual application position at six points indicated by arrows in Figure 20 with a microscope. The application accuracy was expressed by the maximum deviation (mm) at six points. If the maximum deviation at six points was 0.5 mm or less, it was OK, and if it was greater than 0.5 mm, it was NG. Example 2 used adhesive body application device 100 (see Figures 1 to 4), Example 3 used adhesive body application device 100C (see Figures 11 to 13), Example 4 used adhesive body application device 100C (see Figures 14 to 16), Comparative Example 1 used adhesive body application device 1100 (see Figure 18), Comparative Example 2 used an adhesive body application device 100 having no pressing section 50 but a track forming section 10, and Comparative Example 3 used an adhesive body application device 100 having no track forming section 10 but a pressing section 50. Except for these, the same operations and evaluations were carried out as in Example 1.

As shown in Table 1, Examples 1 to 4, which have a path-forming portion and a pressing portion, and in which the difference between the tip of the path-forming portion and the tip of the pressing portion is 0.2 mm or more when the pressing portion is protruding, have OK adhesion to grooves and have OK adhesion accuracy of 0.5 mm or more to curved portions. In particular, Example 2 has good adhesion accuracy to curved portions of 0.2 mm, and Example 3 has particularly good adhesion accuracy to curved portions of 0.1 mm.

In contrast, in Comparative Example 1, an adhesive application device was used in which the difference between the tip of the path forming part and the tip of the pressing part was 0 mm, i.e. the nozzle opening functioned as both the path forming part and the pressing part, but the tip of the nozzle did not enter the groove, and application to the groove part was not possible. In Comparative Example 1, the application accuracy to the curved part was 0.6 mm, which was NG. In Comparative Example 2, an adhesive application device was used that had a path forming part and no pressing part, but application to the groove part was NG because there was insufficient pressing force and the adhesive stuck to the groove wall surface and floated. In Comparative Example 2, the application accuracy to the curved part was 2 mm, which was NG. In Comparative Example 3, an adhesive application device was used that had a pressing part and no path forming part, and application to the groove part was OK, but the application accuracy to the curved part was 3 mm, which was NG.

Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the claims, and it is understood that these naturally fall within the technical scope of the present invention. Furthermore, the components in the above embodiments may be combined in any manner as long as it does not deviate from the spirit of the invention.

This application is based on a Japanese patent application (Patent Application No. 2023-043059) filed on March 17, 2023, the contents of which are incorporated by reference into this application.

1: adhesive body 10, 10A, 10B, 10C: trajectory forming section 50, 50A, 50B, 50C: pressing section 100, 100A, 100B, 100C, 1100: adhesive body application device AX: axis line W: target object

Claims (10)

1. An adhesive attachment device for attaching an adhesive to an object, comprising:
   a trajectory forming unit that places the adhesive body on the target object and forms a trajectory of the adhesive body;
   A pressing unit that presses the adhesive body, which is a part of the trajectory, against the object;
   Equipped with
   Adhesive application device.
2. The pressing portion protrudes from the path forming portion by 0.2 mm or more.
   The adhesive article application device according to claim 1 .
3. The locus forming portion is groove-shaped.
   The adhesive article application device according to claim 1 .
4. The path forming portion and the pressing portion are provided as separate bodies.
   The adhesive article application device according to claim 1 .
5. The pressing unit intermittently presses the adhesive body against the object.
   The adhesive article application device according to claim 1 .
6. The path forming portion and the pressing portion are disposed in close proximity to each other.
   The adhesive article application device according to claim 1 .
7. A rotation mechanism is provided for relatively rotating the path forming unit, the pressing unit, and the object around an axis perpendicular to the object.
   The adhesive article application device according to claim 1 .
8. A linear member for preventing derailment is provided on the outer periphery of the track forming portion.
   The adhesive article application device according to claim 1 .
9. A thread-like adhesive body is attached to the object as the adhesive body.
   The adhesive article application device according to claim 1 .
10. The adhesive body is attached to the object by the adhesive body attachment device according to any one of claims 1 to 9.
    How to apply the adhesive.

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