JP2009035209A - Adhesion part structure of vehicle body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent scattering of low viscosity adhesive swelled out of an adhesion part of a vehicle body panel by a simple structure. <P>SOLUTION: When upper panel 15, a lower panel 16 and a wheel house 13 are integrally connected by spot welding W in overlapped states via the low viscosity adhesive 17, the low viscosity adhesive 17 is swelled out from end edges of the lower panel 16 and the wheel house 13 holding the low viscosity adhesive 17, and thereby there is a possibility that the swelled out low viscosity adhesive 17 is scattered and is adhered to the surface of a vehicle body when washing the vehicle body completed in assembling by injecting water to the vehicle body. But, high viscosity adhesive 18 is applied to cover the low viscosity adhesive 17 swelled out from the end edges of the lower panel 16 and the wheel house 13. As a result, scattering of the low viscosity adhesive 17 can be prevented by shielding the water injected to the vehicle body when washing the vehicle body by the high viscosity adhesive 18, and adhering of the low viscosity adhesive 17 to the surface of the vehicle body can be prevented by an extremely simple and low cost structure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure after an adhesion portion structure of a vehicle body in which a plurality of vehicle body panels are joined together by a joining means in a state where they are overlapped with a low-viscosity adhesive.

When assembling automobile body panels by spot welding, etc., by interposing a thermosetting adhesive made of epoxy resin between the joined body panels, sufficient body strength can be achieved while expanding the welding pitch of spot welding. The one obtained is known from Patent Document 1 below.
Japanese Patent Laid-Open No. 9-309458

  FIG. 5 shows a procedure for coupling the vehicle body panels. The pair of coupling flanges 01a and 01b of the first member 01 having a hat-shaped section, and the pair of coupling flanges 02a and 02b of the second member 02 having the same hat-shaped section. 02b is overlapped with a low-viscosity adhesive 03, the coupling flange 01a of the first member 01 and the coupling flange 02a of the second member 02 are spot welded 04, and the coupling flange 01b of the first member 01 and the second The connecting flange 02b of the member 02 is spot-welded 05. In this case, the uncured low viscosity adhesive 03 protrudes from the coupling surfaces of the coupling flanges 01a and 02a and the coupling surfaces of the coupling flanges 01b and 02b. In this state, if washing water is sprayed onto the vehicle body to perform vehicle washing before the chemical conversion process (painting process), the protruding low-viscosity adhesive 03 scatters and adheres to the vehicle body surface, which causes a problem of reducing the quality of painting. It was.

Conventionally, in order to solve this problem, the following method has been adopted.
(1) Wipe the protruding low-viscosity adhesive manually.
(2) Adopt high-viscosity adhesive that does not scatter even when cleaning water is sprayed
(3) An adhesive temporary curing process called “Precure” is set up in front of the conversion zone.
(4) Reduce the amount of low-viscosity adhesive used to prevent protrusion.
(5) The low-viscosity adhesive that has scattered and adhered to the vehicle body is removed manually in the chemical zone.However, the method (1) above requires a lot of time and labor for manually wiping off the protruding low-viscosity adhesive. In addition to increasing the cost and burden on the operator, it was difficult to completely wipe off the protruding low-viscosity adhesive.

  In the method (2), the high viscosity adhesive is not easy to use, and it is necessary to heat the panel to reduce the viscosity before coating, and to bond the panels without applying time after coating. It was.

  In addition, the method (3) above has the problem that not only the equipment cost increases because it is necessary to provide “precure” equipment, but also the production line becomes longer and the cost of heat energy for heating increases. It was.

  Further, the method (4) has a problem in that the adhesive strength may be lowered due to a decrease in the amount of low-viscosity adhesive used.

  Further, the method (5) requires a lot of time and labor to manually remove the low-viscosity adhesive adhering to the vehicle body, which not only increases the cost and burden on the operator, The electrodeposition layer could be damaged and the anti-rust performance could be impaired.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent scattering of a low-viscosity adhesive that protrudes from a joint portion of a vehicle body panel with a simple structure.

  To achieve the above object, according to the first aspect of the present invention, a vehicle body bonding portion structure in which a plurality of vehicle body panels are joined together by a joining means in a state where they are overlapped via a low-viscosity adhesive. Later, by applying a high-viscosity adhesive so as to cover the low-viscosity adhesive protruding from the edge of the vehicle body panel, the high-viscosity when the water is sprayed and washed on the assembled vehicle body A vehicle body bonding portion structure is proposed in which water is blocked by an adhesive to prevent the protruding low-viscosity adhesive from scattering.

  The wheel house 13, the upper panel 15 and the lower panel 16 of the embodiment correspond to the vehicle body panel of the present invention, and the spot weld W of the embodiment corresponds to the coupling means of the present invention.

  According to the configuration of claim 1, when a plurality of vehicle body panels are joined together by the joining means in a state where they are overlapped with each other via a low-viscosity adhesive, from the edge of the two vehicle body panels sandwiching the low-viscosity adhesive Since the low-viscosity adhesive protrudes, there is a possibility that the protruding low-viscosity adhesive will scatter and adhere to the surface of the vehicle body when the assembled vehicle body is sprayed and washed. However, since the high-viscosity adhesive is applied so as to cover the low-viscosity adhesive that protrudes from the edge of the vehicle body panel, the low-viscosity adhesive is blocked by the high-viscosity adhesive that does not easily splash water sprayed on the vehicle body during cleaning. Can be prevented, and adhesion of the low-viscosity adhesive to the vehicle body surface can be prevented with an extremely simple and low-cost structure.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view of a rear part of a vehicle body, FIG. 2 is an enlarged sectional view taken along line 2-2 in FIG. 1, and FIG. FIG. 4 is an enlarged view of part 4 of FIG.

  As shown in FIGS. 1 and 2, the five-door vehicle includes a wheel house 13 that houses a rear wheel below the rear door 11 and the rear fender 12.

  In a vertical cross section passing through the wheel house 13 in the vehicle width direction, the flange 15a, 16a of the upper panel 15 and the lower panel 16 constituting the rear side frame 14 and the wheel house 13 are spot-welded W in three layers. Yes. At this time, a low-viscosity adhesive 17 made of, for example, a thermosetting epoxy resin is applied in advance between the flange 16a of the lower panel 16 positioned on the outer side of the vehicle body of the rear side frame 14 and the wheel house 13. When the flange 16a of the lower panel 16 and the wheel house 13 are brought into close contact with each other by spot welding W, the low-viscosity adhesive 17 is pushed out from the end edges thereof and protrudes. This low-viscosity adhesive 17 maintains fluidity without being completely cured until the vehicle body is heated in the chemical conversion process (coating process), which is a subsequent process.

  As shown in enlarged views in FIG. 3 and FIG. 4, a high-temperature-setting epoxy resin is used to cover the low-viscosity adhesive 17 that protrudes from the edge 13 a of the wheel house 13 to the surface of the lower panel 16 of the rear side frame 14. A viscous adhesive 18 is applied. The high-viscosity adhesive 18 has a higher viscosity than the low-viscosity adhesive 17, and the uncured low-viscosity adhesive 17 is scattered when subjected to water hammer, whereas the high-viscosity adhesive is water in an uncured state. It has a viscosity that does not scatter even when hit. However, since the viscosity is high, it cannot be applied at room temperature, and it is necessary to apply after heating to lower the viscosity. By this heating, the high-viscosity adhesive 18 can be cured in a shorter time after application than the low-viscosity adhesive 17.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  As shown in FIG. 4, when washing water is sprayed from the nozzle 19 to wash the vehicle body before the chemical conversion step, the protruding low-viscosity adhesive 17 is covered with the high-viscosity adhesive 18 as shown in FIG. In the conventional example that is not present, the low-viscosity adhesive 17 is scattered by water hammer and adheres to the vehicle body, which may reduce the quality of the coating.

  On the other hand, in the present embodiment, as shown in FIG. 4, the protruding low viscosity adhesive 17 is covered with the high viscosity adhesive 18, so that the high viscosity adhesive 18 subjected to water hammer from the nozzle 19 is not yet removed. The cured low-viscosity adhesive 17 can be protected to prevent scattering, and the scattered low-viscosity adhesive 17 can be reliably prevented from adhering to the vehicle body.

  This eliminates the need to use a high-viscosity adhesive 18 that is difficult to handle as the main adhesive, or to perform pre-curing that requires expensive equipment, and pre-treatment for removing the protruding low-viscosity adhesive 17, The post-treatment for removing the low-viscosity adhesive 17 that has scattered and adhered to the vehicle body becomes unnecessary, which can contribute to labor and cost reduction.

  In the present embodiment, the amount of the high-viscosity adhesive 18 used is very small compared to the amount of the low-viscosity adhesive 17 used. There is no obstacle.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the example in which the present invention is applied to the part of the wheel house 13 of the automobile has been described. However, the present invention can be applied to any other part of the automobile.

  Further, the low-viscosity adhesive 17 protrudes from between the edge of the lower panel 16 of the rear side frame 14 and the wheel house 13 (see FIG. 4), but water hammer does not act directly on the protruding portion. The coating with the viscous adhesive 18 is not particularly necessary. Of course, it is also possible to coat the portion with the high viscosity adhesive 18 just in case.

  In the present invention, spot welding W is exemplified as the coupling means, but other coupling means such as rivets and bolts can be employed.

Perspective view of the rear of the car body 2-2 line enlarged sectional view of FIG. 3 direction arrow view of FIG. 5 enlarged view of FIG. Explanatory drawing of panel bonding method using low viscosity adhesive and spot welding together The figure corresponding to the said FIG. 4 which concerns on a prior art example

Explanation of symbols

13 Wheelhouse (body panel)
15 Upper panel (body panel)
16 Lower panel (body panel)
17 Low viscosity adhesive 18 High viscosity adhesive W Spot welding (bonding means)

Claims (1)

After the vehicle body bonding portion structure in which a plurality of vehicle body panels (13, 15, 16) are joined together by the joining means (W) in a state where they are overlapped via a low-viscosity adhesive (17),
By applying high-viscosity adhesive (18) so as to cover the low-viscosity adhesive (17) protruding from the edge of the vehicle body panel (13, 15, 16), water is sprayed onto the assembled vehicle body When cleaning, the adhesive structure of the vehicle body is characterized in that the high-viscosity adhesive (18) blocks water and prevents the protruding low-viscosity adhesive (17) from scattering.

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