JPS58184361A - Seal structure - Google Patents

Abstract

PURPOSE:To prevent the formation of a gap in a part, where opposite ends are connected together, in a manner to maintain shape-retaining properties, by covering the outer surface of a stringlike core material, having flexibility and stretchability, with an adhesive material, and connecting together the two ends in a state to bring them to abut on each other. CONSTITUTION:An adhesive seal material 20 is formed such that an outer surface 22 of a stringlike core material 21 having flexibility and stretchability is covered with an adhesive material 23. A foamed material, e.g., foamed polyurethane, foamed polyethylene etc. having shape-retaining propertis, flexibility, and stretchability, may be used as the core material 21. When the seal material is used, opposite ends 24 of the adhesive seal material 20, first cut to a proper length, are brought into abutment on each other to form the annular adhesive seal material 20. In which case, although ends 24a of the core material 21 do not adhere to each other, two ends 24b of an adhesive mass 23 covering the outer surface 22 of the core material 21 adhere to each other, and this causes the opposite ends 24 of the adhesive seal material 20 to be connected to each other in a seamless manner.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seal structure, and particularly to a seal structure using a string-like adhesive sealant.

Conventionally, this type of seal structure is shown in Figs. 1 to 4, for example.
There is a seal structure for the combination lamp mounting part as shown in the figure. In the figure, reference numeral 1 denotes a rear panel as a mounting base, and a rear panel combination lamp 6 is attached to an opening 2 of the rear panel 1 as a mounting part. In the rear combination lamp 6, a peripheral edge 10 of a lens 9 is fixed to a seven-lamp portion 8 formed on a peripheral edge 7 of a housing 6 having a reflective surface 4 on one side and into which a pulp 5 can be freely fitted.

Then, the surface 1 of the 7 lamp portion 8 facing the rear panel 1
A string-shaped adhesive sealing material 16 is fitted into the groove 12 along the peripheral edge 7 formed in the rear panel 1, and when the combination lamp 6 is attached to the opening 2 of the rear panel 1, the adhesive sealing material 16 is pressed tightly against the rear panel 1. By doing so, the space between the rear panel 1 and the combination lamp (specifically, the seven lamp portions 8 of the housing 6) is sealed.

The string-shaped adhesive sealing material 16 is made of, for example, butyl rubber, which is formed to be somewhat hard so that it has shape retention properties so that it will not break when attached to the groove 12 of the 7-ramp section 8. For installation, a material designed to improve workability is used, and since such an adhesive sealant 16 does not have elasticity due to the above-mentioned reason, it must be attached at both ends to prevent sealing failure due to variations in parts. 14 length! The corresponding parts are joined in an overlapping state. In the above and below, the word string-like is used in a broad sense including various shapes such as round cross-section, angular shape, and evenly-shaped cross section.

However, in such a conventional seal structure, the set-shaped adhesive sealing material 16 is formed to be somewhat hard to provide shape retention, and the adhesive sealing material 160 has both ends 14
Because it was supposed to be joined in an overlapping state,
It is necessary to press both ends 14 of the adhesive sealing material 160 with a fairly large load, and even if it is pressed with a considerably large load, it is difficult to make sure the adhesive sealing material 160 adheres tightly.
One of the problems is that a triangular gap 15 is likely to occur in the overlapping portion of the seals, and variations in sealing performance are likely to occur.

This invention was made by focusing on such conventional problems, and it is possible to easily connect both ends of the adhesive sealing material while giving the adhesive sealing material shape-retaining properties, and the connecting portion of both ends can be easily connected. The purpose is to provide a seal structure that does not create any gaps.

Specifically, this invention forms an adhesive sealing material by laminating the outer surface of a string-like core material with flexibility and stretchability with an adhesive material, and then abutting both ends of the adhesive cooling material to form an adhesive material. The above object is achieved by configuring the structure to connect both ends with an adhesive force of .

The present invention will be explained below based on the drawings.

Incidentally, in the following, parts common to those in the prior art are given the same reference numerals, and redundant explanations will be omitted.

FIGS. 5 to 7 are diagrams showing an embodiment of the present invention. 20 in the figure is an adhesive sealing material, and this adhesive sealing material 20 is an outer surface 22 of a string-like core material 21 having flexibility and elasticity.
is formed by covering it with an adhesive material 26.゛: As the core material 21, a foamed material that is flexible and stretchable and has a shape-retaining property, such as foamed polyurethane or foamed polyethylene, can be used. Since the core material 21 of the adhesive material 26 has shape-retaining properties,
The adhesive material 26 itself is not required to have shape retention properties, and therefore, for example, soft butyl rubber with a higher viscosity than conventional ones can be used. Further, the adhesive sealing material 20 may be formed into a long shape and cut into an appropriate length at the time of use, or may be cut into an appropriate length in advance.

When in use, the adhesive sealing material 20 is first cut into an appropriate length and the ends 24 of the adhesive sealing material 20 are butted against each other to form the adhesive sealing material 20 into an annular shape. In this case, both ends 24 of the core material 21
A do not stick to each other, but both ends 24b of the adhesive material 26 covering the outer surface 22 of the core material 21 stick to each other to form the adhesive sealing material 20.
Both end portions 24 of are connected to each other without vertical grains. Next, the annular adhesive sealing material 20 is fitted into the groove 12 provided in the flange 8 of the housing 6, and when the combination rough pro is installed in the opening 2 of the rear panel 1, the adhesive sealing material 20 is pressed against the rear panel 1. It's fine if you stick it close. Furthermore, when fitting the adhesive sealing material 20 into the groove 12, since the core material 21 has flexibility and elasticity, it can be easily fitted along the groove 12, and the length of the adhesive sealing material 20 can be adjusted. Even if there is an error, it can be easily absorbed. Furthermore, pressing the adhesive sealing material 20 against the rear panel 1 requires only a small load to ensure close contact.

As explained above, since the present invention has the above-described structure, it is possible to butt and join both ends of the adhesive sealing material without overlapping and joining them as in the conventional method. As a result, it is possible to obtain a reliable seal structure without creating a gap between the joints at both ends, and there is no need to press the joints at both ends under a large load as in the past. Moreover, there is an effect that the shape retention property of the adhesive sealing material can also be maintained.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figure 1 is a perspective view showing the vicinity of the rear combination lamp of an automobile, Figure 2 is an enlarged cross-sectional view taken along line n-n in Figure 1, and Figure 3 is Figure 2 II[-I]. Fig. 4 is a perspective view of the adhesive sealing material; Fig. 5 is a sectional view corresponding to Fig. 2 showing an embodiment of the present invention; Fig. 6 is an enlarged view of part ■ in Fig. 5. 7 is a partially enlarged sectional view taken along the line ■■-■ in FIG. 5, and FIG. 8 is a perspective view of the adhesive sealing material. 1 Rear panel as a mounting base 6 Rear combination lamp as a mounting part 13.20
Adhesive sealing material 14.24 Both ends 21 Core material 22 Outer surface of core material 26 Adhesive material (or more) Section - Hoichi 38? Ward Figure 7 2n Figure 8 0

Claims (1)

[Scope of Claims] A seal structure in which a ring-shaped string-shaped adhesive sealing material is arranged between the mounting base and the mounting part, with both ends connected to each other, and the space between the mounting base and the mounting part is sealed. In this, the adhesive sealing material is formed by covering the outer surface of a string-like core material with flexibility and stretchability with an adhesive material, and both ends of the adhesive sealing material are butt-connected to each other. Seal structure featuring.