JP2009195834A - Sticking agent coating method, hole cover which executes sticking agent coating method and seal system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sticking agent coating method which simplifies the work on an assembling line to reduce the load of an operator and achieves the stabilization of quality, and a hole cover for executing the sticking agent coating method. <P>SOLUTION: Release paper 21 is preliminarily coated with a ribbon-like sticking agent 23, which is rotated so as to follow the peripheral shape of the opening part 16 of a housing, in place of the coating on the periphery of the opening part 16 of the housing with an adhesive in assembly-line operation. The release paper 21 is pressed to either the periphery of the opening part 16 or the edge part 19 of the hole cover 18 along with the sticking agent 23 on the spot of the assembly-line operation to transfer the sticking agent 23 to the region of either one of them from the release paper 21. Thereafter, the edge part 19 of the hole cover 18 is pressed to the periphery of the opening part 16 to be joined thereto by the sticking agent 23. Alternatively, the edge part 19 of the hole cover is preliminarily coated with the ribbon-like sticking agent 23 rotated along the periphery of the edge part 19, and the edge part 19 of the hole cover is pressed to the periphery of the opening part 16 at the site of the assembly-line operation to be joined thereto by the sticking agent 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides an adhesive for bonding and sealing between the periphery of an opening that is opened in a part of a housing that is continuously supplied in a flow operation and the edge of a hole cover that closes the opening. The present invention relates to a pressure-sensitive adhesive coating method for coating an agent between the periphery of the opening and the edge of the hole cover, and a hole cover and a seal system for performing the coating method.

  Fig.4 (a) has shown the outline | summary of the door body for motor vehicles. An automobile door body (hereinafter, simply referred to as “door body”) 10 includes a casing including an outer panel 11 positioned on the outdoor side and an inner panel 12 positioned on the indoor side. Built-in mechanisms such as glass (not shown), a run channel for glass guide, a window regulator for operating the glass up and down, and a lock mechanism for locking the door are provided in the internal cavity of the housing provided between the panels 11 and 12. Is housed. The outer panel 11 and the inner panel 12 generally have a slit opening 13 that opens upward to allow the glass to move up and down, and the other periphery except the slit opening 13 is sealed by a hemming part 14 or the like. Are combined.

  The door body 10 can be attached with the above-described built-in mechanism on the assembly line, or can be attached with a vibration-proof material on the inner side of the outer panel 11, so that the built-in mechanism can be operated from the room after completion. In order to allow a part of the built-in mechanism to pass therethrough, an access hole 16 that is one or a plurality of openings is opened. The access hole 16 is generally provided on the inner panel 12 side, but may be opened on the outer panel 11 side in order to attach the door mirror 17, for example. Further, these access holes 16 are also used as discharge ports for discharging excess paint after immersion coating in which the entire door body 10 is immersed in the paint tank. In the illustrated example, two access holes 16 are opened in the inner panel 12, but the number, size, shape, and the like can be arbitrarily selected according to the required specifications.

  When the above-described built-in mechanism is attached in the flow operation in the assembly line, each access hole 16 is covered with a hole cover 18. When the automobile travels in rainy weather or the like, water may enter the door body 10 from the slit opening 13 and further enter the room through the access hole 16. In order to prevent this, the hole cover 18 must be joined to the access hole 16 in a sealed state. For this reason, as shown in FIG. 4B, in the assembly line, the adhesive 23 is applied to the inner panel 12 side around the access hole 16, and the hole cover 18 is pressed on the adhesive 23 to seal the hole cover 18. And joined to the inner panel 12. Although FIG. 4B is an end view, the adhesive 23 goes around the entire circumference of the access hole 16.

  FIG. 5 shows an example of the hole cover 18. The hole cover 18a shown in FIG. 5A is made of a substantially flat film made of a soft resin material such as vinyl chloride, and the operator applies the adhesive applied around the access hole 16 while extending it with both hands in the assembly line. Paste to. The hole cover 18b shown in FIG. 5B is a three-dimensionally formed resin material such as polypropylene formed by vacuum molding or the like. The operator takes this and positions it according to the shape of the access hole 16, and the access hole 16 The edge 19 of the hole cover 18b is pressed against the adhesive applied to the periphery of the adhesive to join them. Since a certain degree of rigidity is maintained by a three-dimensional shape by vacuum forming or the like, there is an advantage of improving workability such that an operator can handle this with one hand. Recently, this type of hole cover 18b is often used. .

  As described with reference to FIG. 4A, the door mirror 17 may be attached to the outer panel 11 of the door body 10. In this case as well, on the one side of the attachment surface in the assembly line so as not to be submerged from the attachment surface. Adhesive is applied, and the door mirror 17 is pressed against the outer panel 11 to seal between them. In the case of the door mirror 17, the attachment to the outer panel 11 is often attached using other fixing means. In this specification, “access hole” includes a hole for attaching such a functional component, and “hole cover” also includes a case where such a functional component itself directly closes the opening. These functional parts are also included.

The types, shapes, materials, and the like of the hole covers 18a and 18b and the door mirror 17 described above are merely examples, and various modifications can be made according to required specifications, and other functional parts can be used. . In recent years, a technique of attaching an integrated panel that covers a plurality of access holes can also be seen (see Patent Document 1).
JP2007-168729

  In a flow operation such as an assembly line, the following two methods are mainly used as a method of applying an adhesive around the access hole 16. One is a method in which an operator applies an adhesive around the access hole 16 using an application gun or the like, and the other is a ribbon shape (string shape) having a diameter of 3 mm inside or outside. In this method, the operator pulls out the band of the sticky adhesive, presses the band around the access hole 16 by hand, circulates around the periphery, butts both ends, and applies.

  However, there is room for improvement in the conventional method described above. First, in the method using the first application gun, there is a problem in arrangement of equipment and space for supplying adhesive to the assembly line side and supplying compressed air for operation of the application gun. Further, when an adhesive containing a solvent is used, there has been a problem of deterioration of the surrounding work environment due to spraying by a coating gun. In the second method of affixing the ribbon-like adhesive, it is necessary to supply this ribbon-like adhesive separately to the assembly line side, and the adhesive band that tends to adhere to the hand etc. is attached to the operator. However, there is a problem that it is inevitable that it is complicated to hold it by hand and sequentially stick it around the access hole 16.

  In general, since many parts are attached to the vehicle side by flow work in the assembly line, it is preferable to provide a system for supplying the minimum necessary parts on the assembly line side. In addition, in order to efficiently perform the flow work according to the line speed, it is possible to simplify the work as much as possible and to eliminate the use of equipment that requires maintenance as much as possible to reduce the load on the operator and improve the workability. Necessary to increase productivity.

  Furthermore, from the viewpoint of quality, there is a possibility that a sufficient adhesive cannot be stably applied around the targeted access hole 16 in the application work with the application gun. Further, in the method of attaching the ribbon-like adhesive by hand, there is a possibility that the adhesive is detached from the periphery of the access hole 16 and attached. In such a case, the entire edge forming the periphery of the hole cover 18 does not adhere to the inner panel 12, and water may enter the room from the location. In order to avoid these problems, it is absolutely necessary to arrange some skilled operators.

  As described above, the present invention solves these problems in the prior art, simplifies the work on the assembly line, reduces the burden on the operator, stabilizes the quality, and more effectively uses the space on the assembly line side. It is an object of the present invention to provide a pressure-sensitive adhesive coating method, a hole cover, and a seal system that implement the method.

  As used herein, “around the access hole” refers to a portion near the periphery of the access hole 16 that is a part of the housing side element (the outer panel 11 or the inner panel 12 in the above example) that forms the access hole 16. In general, it means a circumferential portion of the access hole 16 that is flush with the opening surface of the access hole 16. The “hole cover edge” refers to a part of the hole cover 18 facing the periphery of the access hole 16 described above and forming the outer periphery of the hole cover 18 itself. Generally, the edge portion 19 is formed in a flange shape as shown in FIG. 5B, but in the flat hole cover 18a shown in FIG. 5A, the peripheral portion of itself corresponds to this.

  Further, “application” in the present specification means an operation of applying a pressure-sensitive adhesive (adhesive) to a surface to be applied by using an application head or the like, and “coating” means a process including the application operation or The two are basically distinguished from each other as meaning technology. However, this distinction is only for the purpose of facilitating the understanding of the description, and does not add any specific technical limitation by any of these terms.

  In the present invention, instead of applying the adhesive to the door inner panel which has been performed in the conventional assembly line, the adhesive is previously applied to the release paper or the hole cover side, and this is supplied to the assembly line side. Specifically, the following contents are included.

  That is, one aspect according to the present invention is to join between the periphery of the opening that is opened on the surface of the casing continuously supplied in the flow operation and the edge of the hole cover that closes the opening. An adhesive coating method for applying an adhesive to be sealed between the periphery of the opening and the edge of the hole cover, the ribbon-like adhesive circulating around the shape of the periphery of the opening Is applied onto the release paper in advance, and the release paper together with the adhesive is pressed against either the periphery of the opening or the edge of the hole cover at the flow work site to remove the adhesive from the release paper. The pressure-sensitive adhesive coating method is characterized by comprising the steps of transferring to the side, pressing the edge of the hole cover around the opening, and joining and sealing both with the pressure-sensitive adhesive.

  Another aspect of the present invention is a pressure-sensitive adhesive coating method in which a pressure-sensitive adhesive is applied between the periphery of the opening and the edge of the hole cover, and the edge is attached to the edge of the hole cover. It comprises the steps of pre-applying a ribbon-shaped adhesive that circulates in advance, pressing the edge of the hole cover around the opening at the flow work site, and joining and sealing both with the adhesive. The present invention relates to an adhesive coating method.

  The pressure-sensitive adhesive coating method can be applied as a waterproof seal method for an automobile door body by using a housing as an automobile door body and the opening as an access hole opened in an inner panel or an outer panel of the door body. The pressure-sensitive adhesive can be a rubber-based, acrylic-based, or olefin-based hot-melt adhesive, and in particular, a butyl rubber-based hot-melt adhesive can be used.

  Another aspect of the present invention is a hole cover that is joined so as to cover an opening provided in a casing that is continuously conveyed in a flow operation and seals the opening, and the periphery of the opening The hole cover is characterized in that a ribbon-like adhesive that circulates following the shape of the periphery of the opening is applied to the edge of the hole cover opposite to the hole cover. The hole cover may further include a release paper that covers the adhesive.

  Still another aspect of the present invention is a waterproof seal system that prevents water from entering through an access hole of an automobile door body, the door body including an inner panel or an outer panel having an access hole, and a shape around the access hole. The access hole having a periphery that surrounds the periphery of the access hole, and an adhesive that circulates in a shape following the shape of the adhesive, a release paper that is cut into a shape that covers at least the shape of the adhesive, and the periphery of the access hole are closed. A waterproof seal, wherein the adhesive is preliminarily applied to either the surface of the edge facing the access hole or one of the surfaces of the release paper. About the system.

  By implementing the present invention, it is possible to improve the workability of the sealing operation of the housing opening in the flow work, stabilize the quality, and improve the line side environment.

  Hereinafter, an embodiment of a pressure-sensitive adhesive coating method and a hole cover according to the present invention will be described with reference to the drawings. In the following description, the description will be made in relation to the automobile body exemplified in the section of the prior art, but the present invention is not limited to this. In general, the present invention can be widely applied to a case in which a cover that is covered for the purpose of sealing the opening is attached to the casing with respect to the opening of the casing that is sequentially supplied by a flow operation.

  FIG. 1 shows an adhesive coating apparatus that can be used in the practice of the present invention. The term “pressure-sensitive adhesive” as used herein refers to adhesives that are particularly adhesive at room temperature, have little volatile components and little change over time, and maintain adhesiveness over a long period of time without drying. It has a characteristic. As such an adhesive, rubber-based, acrylic-based, olefin-based hot-melt adhesives can be used. More specifically, a butyl rubber hot melt adhesive is preferable. However, in the application of the present invention, the type of the pressure-sensitive adhesive is not limited as long as it can be used for a coating method and a seal system described in detail below.

  In FIG. 1, an adhesive application device 20 includes a bed 22 for fixing a work 21, an application head 24 for applying an adhesive 23 to the work 21, an application gun 26 fixed to the application head 24, and an application head 24. The XYZ robot 27 moves in the X, Y, and Z directions in the figure, and a main body 28 including a control device (not shown). An adhesive supply hose 29 is coupled to the coating gun 26, and the adhesive is pumped and supplied from a supply source (not shown). In the illustrated example, the work 21 side is fixed and the application gun 26 side is movable, but conversely, the application gun 26 side may be fixed and the work 21 side may be moved. In the example shown in the figure, two beds 22 are prepared so that they can be applied alternately, thereby improving the work efficiency. However, the number of the beds 22 is arbitrary.

  In the first embodiment of the present invention, the workpiece 21 is a release paper (hereinafter referred to as “release paper 21”) cut into a predetermined shape. The release paper 21, which is also called release paper, is formed by coating a base material such as glassine paper with a release agent such as a silicone resin so that the release agent 21 can also release the adhesive and adhesive. The peelability of the release paper 21 is relative, and has a certain adhesiveness to the adhesive. The release paper 21 is available in various specifications in the market, but the release paper 21 here has a certain peelability with the adhesive 23 as described above, and the implementation of the present invention to be described in detail later. Anything may be used as long as it does not prevent it.

  The release paper 21 in the present embodiment is preliminarily cut into a predetermined shape that is large enough to cover the periphery of the corresponding access hole 16. In the illustrated example, it is cut into a simple substantially rectangular shape, but any shape is possible. For example, if there is a sufficient width to hold the adhesive 23, it may be a ring shape with a punched center. Good.

  The pressure-sensitive adhesive coating apparatus 20 configured as described above operates as follows. The release paper 21 cut into a predetermined shape is placed on the bed 22 and fixed. As the fixing method, a method of vacuum suction of the release paper 21 from the bed 22 side is simple. However, the release paper 21 may be fixed by a mechanical method such as pressing the release paper 21 with a claw-like object from the periphery. When the release paper 21 is set, the bed 22 is transported to the back side in the Y direction in the drawing as the application position.

  When the bed 22 is positioned at the application position, the application head 24 descends in the Z direction from above to a predetermined position, and discharges the adhesive 23 in a string shape from the application gun 26. At the same time, the application head 24 moves in the three-axis direction by the operation of the XYZ robot 27 according to a program inputted in advance, and applies the adhesive 23 to a predetermined position of the release paper 21. When the application for rotating the adhesive 23 for one round on the release paper 21 is completed, the coating gun 26 stops the discharge operation and retreats in the Z direction together with the coating head 24. This series of operations is controlled by a control device (not shown) in the main body 28.

  Next, referring to FIG. 2 for the operation of joining the hole cover 18 in a sealed state to the access hole 16 in the assembly line using the adhesive 23 applied in a predetermined shape on the release paper 21 as described above. To explain. FIG. 2A shows a state in which the adhesive 23 applied to the release paper 21 as shown in FIG. 1 is sequentially stacked in such a manner that the release paper 21 is sandwiched therebetween. This is the package at the time of shipment, and is transported and supplied to the assembly line side. As described above, since the pressure-sensitive adhesive 23 hardly changes over time, the adhesiveness (adhesiveness) does not deteriorate. Moreover, since the release paper 21 is always interposed between the pressure-sensitive adhesives 23 in the transported state, the pressure-sensitive adhesives 23 do not come into contact with each other and do not become difficult to separate.

  The pressure-sensitive adhesive 23 that has been transported in the packing form shown in FIG. 2A and supplied to the assembly line side that is the flow work site is taken out one by one together with the release paper 21 by the operator. If the release characteristics of the release paper 21 are the same, the adhesive 23 remains on the side of the lower release paper 21 due to the action of gravity, and the adhesive is applied in a desired shape together with the release paper 21 sequentially from above. 23 can be taken out. However, if necessary, the degree of peeling on the back side (the side opposite to the side on which the adhesive 23 is applied) is made higher than the degree of peeling on the front side (the side on which the adhesive 23 is applied). Thus, the adhesive 23 for one time can be more easily taken out together with the release paper 21.

  The release paper 21 coated with the adhesive 23 taken out by the operator is carried to a position facing the predetermined access hole 16 of the door body 10 as shown in FIG. Is aligned and pressed. Thereafter, the release paper 21 is peeled off, so that the adhesive 23 previously applied in a predetermined shape as shown in FIG. 2C is formed around the access hole 16 due to the difference in peelability between the release paper 21 and the inner panel 12. It will be in the same state as it was applied to that position. Thereafter, a hole cover 18 that is separately supplied to the assembly line side is fitted into the access hole 16, and the edge 19 is pressed against the adhesive 23 and joined. The peeled release paper 21 can be discarded or reused after collection.

  A feature of the adhesive coating method according to the present embodiment is that the adhesive coating performed conventionally in an assembly line, in particular, a coating operation in which a ribbon-shaped adhesive is pulled out and attached by the operator by hand is predetermined. The shape is modified to be applied to the release paper 21 outside the line. Also, based on the new knowledge that release paper, which was previously used only for the purpose of covering and protecting the adhesive (adhesive), can be an effective means to mediate the coating operation, It was used for the agent coating method. Taking an automobile assembly line as an example, a plurality of vehicle types are generally supplied to the same line. Even with the same model, the shape of the door and the location and shape of the access hole differ depending on the number and type of doors (2-door, 4-door, 5-door, sedan, coupe, etc.), and they are transported to the conveyor on the assembly line. Vehicles are always moving. It is extremely difficult to automate the application of the adhesive in such a state, and even a facility for automation takes a complicated assembly line space. Overlapping these factors, in the prior art, the hole cover sealing and mounting operations, including the adhesive application, all depended on the operator's manual work. This situation is the same in the assembly method in which only the door body is assembled alone before being attached to the vehicle side.

  According to the present embodiment, it is extremely easy to apply the adhesive 23 following the arbitrary shape on the release paper by numerical control outside the assembly line. The applied adhesive 23 is applied to the release paper 21. It is easy to transfer from the door to the door body 10 side. This eliminates the need for skilled operators in this adhesive coating method, improving workability, improving sealability, improving line-side space efficiency, and improving the work environment. The effect will be achieved. It is preferable to apply the adhesive to the release paper 21 by numerical control in order to stabilize the quality, but it is of course possible to apply by other control methods or manually. Even in the case of applying manually, a much more stable operation is possible compared to the current application operation performed on an assembly line in which the application side always moves.

  Further advantages include the following. In the flow work in which various types of vehicles flow, in general, "line balance", that is, in order to make the placement of the operator more efficient by making the assembly work load uniform, usually a car model with a high assembly work load and a car model with a low work load are mixed. We will lay a system to supply to the assembly line. In this case, if the adhesive application process is automated in the assembly line where various types of vehicles with different body formats are sequentially switched as described above, the application position and the application shape for each vehicle type change (extremely for each vehicle). It is necessary to switch the control, etc., and to make initial settings. On the other hand, according to the present embodiment in which the adhesive is applied outside the assembly line, it is possible to continuously perform the application work corresponding to the same vehicle type for a certain period of time, and the setup man-hour can be extremely reduced. , Greatly increase productivity.

  In the above-described method, the adhesive 23 applied to the release paper 21 is transferred to the access hole 16 side of the door body 10. However, in another aspect using the same method, the release cover 21 is moved from the hole cover 18. It is possible to transfer the adhesive 23 to the side. That is, the adhesive 23 can be first transferred to the hole cover 18 side, and the hole cover 18 with the adhesive 23 attached can be fitted into the access hole 16 and pressed to be joined and sealed. The effect in this case is exactly the same as the previous aspect described above, but it is a powerful alternative method when the assembly work around the door is duplicated and access for transferring the adhesive to the door side is difficult. obtain.

  When using the above alternative method, the shape of the adhesive 23 must be reversed between the case where the adhesive 23 is transferred to the inner panel 12 side and the case where the adhesive 23 is transferred to the hole cover 18 side. To cope with this, if the entire package is turned upside down as shown in FIG. 2A and the adhesive 23 is taken out together with the release paper 21 in order from the top, the adhesive 23 that is reversed upside down can be easily obtained. be able to.

  Next, an adhesive application method according to the second embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the adhesive application is performed outside the assembly line in common with the previous embodiment, but the adhesive application is applied directly to the access hole 18 instead of the release paper 21. It is different. In FIG. 1 described above, in the present embodiment, the hole cover 18 (shown in parentheses in FIG. 1) itself is set as a work by vacuum suction or the like on the bed 22 of the adhesive application device 20. .

  In FIG. 1, the bed 22 to which the hole cover 18 is fixed is positioned at a position facing the application gun 26. On the other hand, the coating head 24 is lowered to discharge the adhesive 23 from the coating gun 26. At the same time, the coating head 24 is moved by the XYZ robot 27, and the adhesive 23 is discharged so as to go around the edge 19 (see FIG. 5B) of the hole cover 18. The discharge operation at this time is exactly the same as in the first embodiment. Unlike the case of the release paper 21, the edge 19 of the hole cover 18 may be a three-dimensional curved surface. However, since movement control in the Z direction by the XYZ robot 27 is also possible, there is no obstacle to the coating operation. Absent.

  When the application of the adhesive 23 is completed, the hole cover 18 is removed from the bed 22 and shipped. As shown in FIG. 3A, the taken-out hole cover 18 is covered with release paper 21 so as to cover the applied adhesive 23, and sequentially stacked. This becomes a package of shipment and is transported and supplied to the assembly line side which is the work site. The supplied hole covers 18 are sequentially removed one by one by the operator, and after the release paper 21 is peeled off as shown in FIG. 3 (b), the corresponding door body 10 is shown in FIG. 3 (c). It is pressed against the access hole 16 and joined. The peeled release paper 21 may be discarded or reused after collection.

  The advantage of the pressure-sensitive adhesive coating method according to the present embodiment over the prior art is that, as in the previous embodiment, a skillful technique for pressure-sensitive adhesive coating is unnecessary, improving workability, and an assembly line. Includes improving side space efficiency, improving quality, and improving the work environment. In addition, when compared with the pressure-sensitive adhesive coating method of the previous embodiment in which the pressure-sensitive adhesive 23 is applied to the release paper 21, the manual operation of aligning the pressure-sensitive adhesive 23 with the position of the access hole 16 is eliminated. Is accurately positioned in advance at a predetermined position of the hole cover 18 and directly applied, so that it is possible to more reliably avoid the occurrence of positional deviation between the adhesive 23 and the hole cover 18.

  In particular, when the hole cover 18 has a three-dimensional shape by vacuum forming or the like like the hole cover 18b shown in FIG. 5B, the flexible release paper 21 shown in the previous embodiment is pressed against the inner panel 12. In contrast, the work becomes much easier, and the workability can be improved, for example, the operator can pick up, press, and join with one hand. However, the pressure-sensitive adhesive coating method according to the present embodiment can of course be applied to the film-like hole cover 18a shown in FIG.

  In any of the above-described embodiments, it becomes extremely effective to enable stable adhesive application by numerical control. In other words, when applying adhesive by manually operating the application gun on the assembly line, in addition to the problem of whether it can be applied accurately at the target position, the tip of the application gun and the door panel side Variations are unavoidable in the case of manual operations such as distance, moving speed of the coating gun with respect to the door panel, and the amount of adhesive applied from the coating gun.

  On the other hand, in the application work using the adhesive application device 20 as shown in FIG. 1, these adjustments related to the application conditions can be optimally controlled. Taking the embodiment of the automobile door body as an example, various conditions such as the gap between the tip of the coating gun 26 and the workpiece 21, the moving speed of the coating gun 26 with respect to the workpiece 21, and the diameter of the adhesive 23 are appropriately set. By controlling, the application amount error of the adhesive can be kept within 10%. It is practically impossible to realize such high-precision control manually on the assembly line.

  As mentioned above, although each embodiment of the adhesive coating method which concerns on this invention has been described, this invention also includes the hole cover 18 to which this adhesive coating method is applied. The hole cover 18 is a cover for closing an opening such as a work access hole 16 that opens in the housing, and the edge 19 is attached to the edge 19 on the side facing the periphery of the access hole 16. It is characterized in that a circulating adhesive 23 is applied. It is preferable that the adhesive 23 is further covered with a release paper 21 that covers the adhesive 23.

  The present invention further includes a waterproof seal system for an automobile door body. The waterproof seal system covers the door body 10 including the inner panel 12 having the access hole 16, the adhesive 23 following the shape of the periphery of the access hole 16, and at least covers the adhesive 23 according to the shape of the adhesive 23. The release paper 21 is cut into a desired shape, and the hole cover 18 having an edge 19 that covers the periphery of the access hole 16, and the adhesive 23 is used for the access hole 16 at the edge 19 of the hole cover 18. It is characterized by being previously applied to either the surface facing the side or the surface facing the access hole 16 of the release paper 21.

  The pressure-sensitive adhesive coating method, hole cover, and waterproof seal system according to the present invention are used in an industrial field in which assembly processing including a process of closing and sealing a casing opening by a flow operation is performed, for example, in an industrial field of automobile assembly. It can be used effectively.

It is a perspective view which shows the outline | summary of the adhesive coating device used for embodiment concerning this invention. It is explanatory drawing which shows the outline | summary of the adhesive coating method of embodiment concerning this invention. It is explanatory drawing which shows the outline | summary of the adhesive coating method of other embodiment concerning this invention. It is the perspective view (a) and end view (b) which show the outline | summary of the door body for motor vehicles, and the hole cover which seals the access hole opened to this door body. It is a perspective view which illustrates a hole cover.

Explanation of symbols

10. Door body, 11. Outer panel, 12. Inner panel, 13. 15. slit opening, Access hole, 17. Door mirrors, 18. Hole cover, 19. Edge, 20. 20. adhesive application device; Release paper (work), 23. 26. Adhesive (adhesive) Coating gun, 27. XYZ robot, 29. Adhesive supply hose.

Claims (8)

A pressure-sensitive adhesive that joins and seals between the periphery of the opening that is opened on the surface of the housing continuously supplied by the flow operation and the edge of the hole cover that closes the opening is attached to the opening. In the adhesive coating method of coating between the periphery and the edge of the hole cover,
A ribbon-like adhesive that circulates following the shape of the periphery of the opening is applied in advance on the release paper,
At the flow work site, the release paper together with the adhesive is pressed against either one of the periphery of the opening or the edge of the hole cover, and the adhesive is transferred from the release paper to either one of the parts,
A pressure-sensitive adhesive coating method comprising the steps of pressing an edge of the hole cover around the opening and bonding and sealing both with the pressure-sensitive adhesive. A pressure-sensitive adhesive that joins and seals between the periphery of the opening that is opened on the surface of the housing continuously supplied by the flow operation and the edge of the hole cover that closes the opening is attached to the opening. In the adhesive coating method of coating between the periphery and the edge of the hole cover,
Preliminarily apply a ribbon-like adhesive around the edge to the edge of the hole cover,
A pressure-sensitive adhesive coating method comprising the steps of pressing an edge of the hole cover around the opening at a flow work site, and joining and sealing both with the pressure-sensitive adhesive.   The pressure-sensitive adhesive coating method according to claim 1 or 2, wherein the casing is an automobile door body, and the opening is an access hole opened in an inner panel or an outer panel of the door body.   The pressure-sensitive adhesive coating method according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive comprises a rubber-based, acrylic-based, or olefin-based hot melt adhesive.   The pressure-sensitive adhesive coating method according to claim 4, wherein the pressure-sensitive adhesive is a butyl rubber-based hot melt adhesive.   In the hole cover that is joined so as to cover the opening provided in the casing that is continuously conveyed in the flow operation and seals the opening, the edge of the hole cover that faces the periphery of the opening is A hole cover characterized by being coated with a ribbon-like adhesive that goes around the shape of the periphery of the opening.   The hole cover according to claim 6, further comprising release paper covering the adhesive. In a waterproof seal system that prevents water from entering the access hole of an automobile door body,
A door body including an inner panel or an outer panel having an access hole;
An adhesive that circulates following the shape of the periphery of the access hole;
Release paper cut into a shape covering at least the pressure sensitive adhesive according to the shape of the pressure sensitive adhesive,
A hole cover for closing the access hole having an edge surrounding the periphery of the access hole;
The waterproof seal system, wherein the adhesive is preliminarily applied to either the surface of the edge facing the access hole or one of the surfaces of the release paper.

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