JPH0474177B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an assembly method for bonding inner and outer panels of a synthetic resin molded body to each other, such as a lid member for an automobile body, and an assembly method therefor. This relates to the assembly jig used.

[Prior art and its problems]

Conventionally, in order to manufacture an assembly by adhering the inner and outer plates of a synthetic resin molded body to each other, a method was generally used in which they were positioned relative to each other based on the outer peripheral flange of the molded body. The dimensional accuracy of the flange portion of the synthetic resin molded body is poor, and therefore, with this method, the dimensional accuracy of the assembled product is insufficient and the adhesive strength is also unsatisfactory.

If it is a lid member with a curved shape such as an automobile body part (for example, Utility Model Application Publication No. 108872/1983), the inner panel is placed in a jig whose shape follows the external shape of the molded product. The conventional method used was to set the outer panel and the outer panel and press and bond them together, but synthetic resin moldings suffer from shrinkage and shrinkage.
There were problems such as warpage and other deformations, and the molded object before bonding had low rigidity, making it difficult to align with the jig, making assembly work complicated, and having insufficient dimensional accuracy and adhesive strength. .

[Problem of invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an assembly method and an assembly jig that solve the above-mentioned problems when assembling an outer panel and an inner panel of synthetic resin molded bodies by adhering them to each other.

[Means for solving problems]

In the present invention, in order to assemble synthetic resin molded bodies by adhering them to each other, an outer panel that is positioned in the same manner except in the vertical direction is placed on an inner panel that is positioned to the minimum extent necessary to avoid excessive restraint. This method was developed based on the fact that the above problem can be solved by intermittently sandwiching the bonded portions of both panels, and the approximately flat outer panel made of synthetic resin and the inner panel made of synthetic resin are interchangeably made. In this method of assembling a synthetic resin molded body, the inner panel is supported substantially horizontally, and the left and right sides are aligned using an assembly jig having a plurality of positioning members. , a first step of positioning and placing the outer panel on the inner panel, a second step of positioning and placing the outer panel on the inner panel, and a third step of intermittently pinching and pressurizing the bonded portions of both the inner and outer panels at predetermined intervals. A method for assembling a synthetic resin molded body, the gist of which is a process and the following steps. and an assembly jig for a synthetic resin molded body, which adheres a substantially flat synthetic resin outer panel and a synthetic resin inner panel to each other to form a closed cross section at least around the outer panel. A plurality of support members support the inner panel substantially horizontally, one of the plurality of support members regulates the outer panel and the inner panel at least in the front and rear directions and the left and right directions, and the other one at least A synthetic resin molded article comprising: a positioning member that regulates either the front-rear direction or the left-right direction; and a clamping piece that intermittently clamps and presses the bonded parts of both the outer and inner panels at predetermined intervals. assembly jig. It is in.

In the present invention, the synthetic resin molded article is, for example,
SMC (sheet molding compound)
Compression molding using BMC (bulk molding compound) or other molding methods can be used to mold thermosetting resins such as polyester resin, epoxy resin, and phenolic resin, and injection molding and other molding methods can be used. Moldings of various thermoplastic resins can be made using the following molding method.

Since the synthetic resin molded article of the present invention is produced by placing an inner panel almost horizontally and stacking an outer panel on top of it, the outer panel has a substantially flat plate shape to the extent that it can be stacked from above. There is a need.

In addition, care should be taken to avoid excessive clamping by providing a "relief" in the area where both the inner and outer panels are clamped within a range that does not cause undulating deformation after bonding due to insufficient rigidity of each panel.

Furthermore, in order to support the inner panel substantially horizontally, at least two to three supporting members are required, but if the inner panel itself has low rigidity, it is supported at multiple locations. Note that the support member can also serve as a positioning member or a holding piece.

Embodiments of the present invention will be described in detail below with reference to the drawings.

〔Example〕

FIG. 1 is a plan view of an automobile trunk lid to which the present invention can be applied, seen from the back side. Reference numeral 1 denotes an outer panel, which has a substantially flat plate shape, although it has a curved surface that slopes downward. Reference numeral 2 denotes an inner panel, which has a substantially hat-shaped cross section at least around the outer panel, and both panels are bonded to each other (described later) to form a closed cross section.

Both panels 1 and 2 are each molded from glass fiber-reinforced unsaturated polyester resin by compression molding using SMC, for example, and are coated with adhesive 3.
(Epoxy or urethane adhesive) to firmly bond each other.

An assembly jig described below is used to join both panels 1 and 2.

(Assembling jig - Part 1) Fig. 7 is a sectional view showing one example of the assembly jig, in which 91 is a bed, 92 is a support, and the bed 91
is fixed to. A guide tube 93 is fixed to the bed 91 and has a guide surface extending in the vertical direction.

Reference numeral 94 denotes a leg body, the lower end of which is fitted into the guide tube 93 and supported by a balance spring 95.

An arm 96 is pivotally attached to the leg 94 and is swingable by a hydraulic cylinder 97.

At the tips of the legs 94 and arms 96, there are clamping pieces 81,
81, 82, and 82 are formed, and are configured to sandwich and press the bonded portions of both panels 1 and 2. Note that the distance between the holding pieces 81 and 82 is (thickness of both panels) + (thickness of the adhesive layer), for example, 2.5
+2.5+0.5=5.5mm, stopper 98
is provided.

A magnetic force or a weight can be used in place of the balance spring 95, and in short, the structure should be such that the clamping part can move up and down by about ±3 mm while supporting the weight of the legs 94 and above. . Further, instead of the hydraulic cylinder 97, an electric motor or manual operation may be used.

To assemble both panels 1 and 2 using this assembly jig, first open the arm 96 (position 9 shown by the chain line).
6') Position the inner panel 2 and the outer panel 1, one of which has been coated with adhesive 3 in advance, using the positioning method described below and place them one after another, then close the rear arm 96 and tighten the gripping pieces 81, 82. The adhesive parts of both panels are clamped and pressurized. in this case,
If the adhesive 3 is made of thermosetting resin, the curing time can be accelerated by heating the clamping pieces 81 and 82 in advance or by incorporating a heating source (not shown), which improves work efficiency. Good.

Next, support and positioning will be explained.
If the synthetic resin molded body is about the same size as the trunk lid for an automobile shown in FIG. 1, it will require support at multiple locations, depending on the rigidity of each panel.

Reference numerals 5, 6, 7, 7, . . . indicate support portions, and details of the first support portion 5 are shown in FIG. A horizontal portion is formed at the upper end 51 of the support column 92 (FIG. 7), and the inner panel 2
Support the horizontal plane at the bottom of the cross section of the hat.

Further, a pin 5 is provided above the horizontal part of the upper end 51.
2 and 53, the pin 52 fits into a circular hole (slightly larger diameter than the pin 52) formed in the inner panel 2, and the pin 53 fits into a circular hole (slightly larger diameter than the pin 53) formed in the outer panel 1. large diameter), and both panels 1 and 2 are positioned in the front-rear direction and left-right direction, respectively.

Details of the second support member 6 are shown in FIG. Although the structure is substantially the same as that of the first support section described above, the hole shape of the inner panel 2 is different. That is, as shown in FIG. 4, the hole is formed into an elongated hole, and the circular pin 62 is restricted only in the left and right directions, but is free in the front and rear directions. The relationship between the hole shape of the outer panel 1 and the pin 63 is also the same as that shown in FIG. 4.

Details of the third support portions 7, 7, . . . are shown in FIG.
That is, the upper end 71 of the support column 92 only supports the bottom of the inner panel 2, and does not restrict it in the front-rear direction or the left-right direction.

The combined effects of the above three types of support parts 5, 6, 7, 7, etc. are summarized as follows.

The inner panel 2 is supported by the upper ends of the columns 51, 61, 71, . . . at a plurality of positions depending on its rigidity, and is kept substantially horizontal.

The positioning of the inner panel 2 in the front-rear direction, left-right direction, and rotational direction (rotation direction in the plane of the paper in FIG. 1) is regulated by circular holes and elongated holes using two pins 52 and 62.

Positioning of the outer panel 1 is performed in the same manner as described above.

Note that the adhesive 3 is applied in the vertical direction of the outer panel 1.
is supported by the adhesive surface.

Next, the holding pieces 81 and 82 hold the support parts 5 and 6,
7, 7 is provided over the entire adhesive section, and a longitudinal sectional view thereof is shown in FIG. The contact portions with the molded bodies 1 and 2 are provided with an appropriate relief 83 so that the molded bodies 1 and 2 are intermittently clamped and pressurized. For example, in the case of an SMC compression molded body of unsaturated polyester resin and both panels having a thickness of 2.5 mm, good adhesion was possible with P=200 mm and C=20 mm. The reason for providing the relief 83 is to reduce the manufacturing cost of the assembly jig and to easily avoid accuracy defects due to dust, scratches, etc. on the contact surface. The arrangement of the contact portions in the plan view is shown, for example, by the perspective portions 8, 8, . . . in FIG.

(Assembling jig - Part 2) FIG. 8 is a sectional view showing another embodiment of the assembly jig. The difference from FIG. 7 is that the leg 94' is directly fixed to the bed 91, and the pins 52, 53 (or 62, 63) are attached directly to the support 92. The difference is that the inner panel 2 is not supported.

The supporting and positioning functions of both panels 1 and 2 in this embodiment are summarized as follows.

The inner panel 2 has lower clamping pieces 82, 8
2,... to keep it almost horizontal.

The positioning of the inner panel 2 in the front-rear direction, left-right direction, and rotational direction is performed using two pins 52 and 6.
2 and is regulated by a circular hole and an elongated hole.

Positioning of the outer panel 1 is performed in the same manner as described above.

Other structures and functions are completely the same as those of the embodiment shown in FIG.

9 to 12 show an automobile roof panel assembly which is another embodiment of a synthetic resin molded article to which the present invention can be applied.

Since the roof portion R, the window portion W, and the pillar portion P are manufactured integrally, the shape is somewhat complicated, but the assembly method and assembly jig of the present invention can be applied to at least the roof portion R. can.

That is, the outer panel 1 _R and inner panel 2 _R (indicated by broken lines in Figures 9 and 10) of the roof R are the same as the outer panel 1 and inner panel 2 of the trunk lid (Figure 1, etc.). Correspondingly, as shown in FIGS. 11 to 13, an assembly method according to the present invention is possible.

In order to assemble the inner panel to the window portion R and the pillar portion P, a method similar to that of the present invention or another method may be used, but the explanation thereof will be omitted.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, it is possible to handle a single synthetic resin molded body (before assembly) with insufficient molding dimensional accuracy and rigidity, and to When assembling the parts, they are supported almost horizontally, positioned accurately, and the bonded area is clamped and pressurized to the minimum necessary level, making the assembly process highly efficient and ensuring the dimensional accuracy of the assembly. Good and sufficient adhesive strength can be obtained.

Since the number and area of support members, positioning pins, clamping pieces, etc. are kept to the minimum necessary, it is easy to deal with dust, dirt, scratches, etc. that tend to occur in the factory, and assembly work is always performed with high precision and high efficiency. It becomes possible.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the invention. FIG. 1 is a plan view of an automobile trunk lid to which the present invention can be applied, seen from the back side. FIG. 2 is a cross-sectional view of FIG. 1. FIG. 3 is a cross-sectional view taken from FIG. FIG. 4 is a - sectional view in FIG. 3. FIG. 5 is a cross-sectional view taken from FIG. 6th
The figure is a - sectional view in FIG. 1. FIG. 7 is a sectional view showing an example of an assembly jig according to the present invention. FIG. 8 is a sectional view showing another example of the assembly jig according to the present invention. FIG. 9 is a plan view of an automobile roof panel assembly to which the present invention can be applied. FIG. 10 is a side view of the same. Figure 11 shows the XI- in Figure 10.
XI sectional view. Figure 12 shows XII-XII in Figure 10.
Cross-sectional view. Figure 13 is - in Figure 10.
FIG. [Explanation of main symbols] 1... Outer panel, 2...
Inner panel, 3... Adhesive, 5, 6, 7... Support part, 52, 53, 62, 63... Positioning pin, 8
1, 82... clamping piece, 83... escape, 91... bed,
92...Strut, 94, 94'...Leg body, 96...Arm, 9
7...Hydraulic cylinder, 98...Stopper.

Claims (1)

[Claims] 1. A substantially flat synthetic resin outer panel;
The synthetic resin inner panel is glued together,
In the method of assembling a synthetic resin molded body forming a closed cross section at least around the outer panel, the inner panel is supported substantially horizontally, and the inner panel is supported in the left-right and front-rear directions using an assembly jig having a plurality of positioning members. A first step of positioning and placing the outer panel on the inner panel, a second step of positioning and placing the outer panel on the inner panel, and a third step of intermittently pinching and pressurizing the adhesive portions of both the inner and outer panels at predetermined intervals. A method for assembling a synthetic resin molded body. 2. A substantially flat outer panel made of synthetic resin;
The synthetic resin inner panel is glued together,
An assembly jig for a synthetic resin molded body forming a closed cross section at least around the outer panel, comprising a plurality of supporting members supporting the inner panel substantially horizontally, one of the plurality of supporting members supporting the outer panel and the outer panel. A positioning member that regulates at least the front-rear direction and the left-right direction of the inner panel, and another positioning member that regulates at least one of the front-rear direction or the left-right direction, and the adhesive portions of both the outer and inner panels are spaced at a predetermined interval. An assembly jig for a synthetic resin molded article, comprising: a clamping piece that intermittently clamps and presses the body;