JPH0522648Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bolt welding structure for attaching parts to a panel.

[Conventional technology]

Conventionally, as shown in FIG. 5, for example, a bolt 3 is inserted into a bolt hole 2 of a reinforcing material 1 from the back side, and a flange portion 31 of the bolt 3 is welded to the back surface of the reinforcing material 1. Reinforcement material 1 with attached
is brought into contact with the back surface of the panel 4 and welded. At this time, the bolt rod 32 of the bolt 3 protruding from the surface of the reinforcing material 1 is inserted into the bolt hole 5 of the panel 4,
The bolt rod 32 is made to protrude from the surface of the panel 4.
A base 34 without a thread is formed at the root of the bolt rod 32 via a step 33;
The periphery of the bolt hole 5 is sealed from the surface of the panel 4 with a sealing material 6.

In this way, the bolts 3 for attaching parts to the panel 4 are welded through the reinforcing material 1. The panel 4 is, for example, the body of an automobile, and the parts are, for example, exterior parts.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional configuration, it takes time and effort to apply the sealing material 6 to the base 34 of the bolt 3 and the periphery of the bolt hole 5, and it is difficult to apply the sealing material 6 uniformly all around the circumference. can be,
Sealing performance is uncertain due to variations between workers.

[Means for solving problems]

The present invention, as a means to solve the above-mentioned conventional problems, penetrates the bolt 3 from the back side into the bolt hole 5 provided in the panel 4, and the flange portion 31 of the bolt 3
are welded to the back surface of the panel 4, a ring-shaped hot melt sheet 16 is fitted onto the bolt rod 32 of the bolt 3 protruding from the surface of the panel 4, and the hot melt sheet 16 is heated and melted to form the bolt 3 and the bolt. This provides a bolt welded structure with the hole periphery sealed.

[Effect]

A bolt is inserted into the bolt hole provided in the panel from the back side, but a reinforcing material may be welded to the bolt in advance. Then, the flange portion of the bolt or the reinforcing material is welded to the back surface of the panel. A ring-shaped hot melt sheet is fitted onto the bolt rod protruding from the panel surface, and when heated, the hot melt sheet melts and seals the bolt and bolt hole periphery. Such heating can be used, for example, in a paint drying process in an automobile manufacturing process. A ring-shaped hot melt sheet is manufactured by a method such as punching a hot melt sheet into a ring shape, and it is extremely easy to make the thickness uniform.

[Effect of idea]

Therefore, in the present invention, the bolt and the bolt hole periphery are reliably sealed, and extra effort such as applying sealant is not required.

〔Example〕

An embodiment of the present invention is shown in FIGS. 1 and 2. A bolt 3 is inserted through the back side of the bolt hole 2 of the reinforcing member 1, the flange portion 31 of the bolt 3 is welded to the back side of the reinforcing member 1, and the reinforcing member 1 with the bolt 3 attached in this way is attached to the panel 4. At this time, the bolt rods 32 of the bolts 3 protruding from the surface of the reinforcing material 1 are inserted into the bolt holes 5 of the panel 4, and the bolt rods 32 are attached to the surface of the panel 4. protrude from A stepped portion 33 is provided at the root of the bolt rod 32.
A screwless base 34 is formed through the base 34, and a ring-shaped hot melt sheet 16 is fitted into the base 34. When the hot melt sheet 16 is heated and melted, the hot melt sheet 16 becomes As shown in FIG. 2, the periphery of the base 34, the bolt holes 5 of the panel 4, and the peripheries of the bolt holes 2 of the reinforcing member 1 are uniformly sealed.

In this way, the bolts 3 for attaching parts to the panel 4 are welded through the reinforcing material 1.

Other embodiments are shown in FIGS. 3 and 4. In this embodiment as well, the reinforcing material 1 with bolts 3 attached is brought into contact with the back surface of the panel 4 and welded in the same manner as in the previous embodiment.
A bank-like part 4A is formed in the bank-like part 4A.
A bolt hole 5 is provided in the. and reinforcement material 1
A ring-shaped hot melt sheet 16 is fitted in advance to the base 34 of the bolt 3 attached to the panel, and then the reinforcing member 1 is fitted with the bolt rod 32 of the bolt 3 into the bolt hole 5, so that the bolt rod 32 is attached to the panel. It is abutted and welded to the back surface of the panel 4 so that it protrudes from the surface of the panel 4. When the hot melt sheet 16 is heated and melted, the hot melt sheet 16 flows and spreads into the space between the reinforcing material 1 and the embankment portion 4A of the panel 4, as shown in FIG. The hot melt sheet 16 overflows from the bolt hole 5 of the panel 4 and seals the bolt hole 5 and the periphery of the base 34.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention; Figure 1 is a side sectional view before sealing, Figure 2 is a side sectional view after sealing, and Figures 3 and 4 are side sectional views. 3 is a side sectional view before sealing, FIG. 4 is a side sectional view after sealing, and FIG. 5 is a side sectional view of a conventional example. In the figure, 3... bolt, 4... panel, 5... bolt hole, 16... hot melt sheet, 32... bolt rod, 31... flange part.

Claims (1)

[Scope of utility model registration request] A bolt is inserted into the bolt hole provided in the panel from the back side, the flange part of the bolt is welded to the back side of the panel, and a ring-shaped hot melt sheet is fitted to the bolt rod protruding from the panel surface. A bolt welding structure characterized in that the bolt and the periphery of the bolt hole are sealed by heating and melting the hot melt sheet.