JPS6175016A - Automobile door weather strip - Google Patents

Abstract

PURPOSE:To ensure the shape holdability of a hollow seal lip and the door closability thereof, by forming a narrow section in a weather strip on the seal surface side of a retainer flange support groove formed in the connecting section between the base section and seal surface of the weather strip. CONSTITUTION:When a door is closed, a torsional deformation brought about in the corner section of a hollow seal lip 7B by an opening edge section 3a induces an elastic deformation in the hollow seal lip 7 outward of a vehicle about an inner concave groove 12 in a narrow section 11 so that the seal lip 7B takes a position as indicated by the one-dot chain line, and then, the seal surface part 16A of the corner section is made in close contact with the the opening edge section 3a so that the seal lip 7B returns to a position as indicated by the solid line from the position as indicated by the one-dot chain line. With this arrangement a buckling section 14 is subjected to a dog-leg like elastic deformation while it moves outward of the vehicle about the narrow section 11, and therefore, the seal lip 7B may offer a whole surface contact condition under a suitable sealing reaction force, thus the shape holdability of the hollow seal lip and the door-closability thereof may be enhanced.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a door weather strip for a motor vehicle.

Prior Art FIG. 3 is a perspective view showing a part of a door with a door 7 of an automobile, in which a door weather strip 2 is attached to the peripheral edge 1a of the door, and when the door 1 is closed, the door weather strip 2 is attached. By coming into close contact with the opening line portion 3a of the vehicle body opening 3, the parting gap between the opening radius portion 3a and the door is adjusted.

As shown in FIG. 4, this door weather strip 2 includes a base portion 5 fixed to the peripheral edge 1a of the door 1 via a retainer 4, and a base portion 5 which is integrally molded.
A device comprising a hollow knoll lip 7 having a/-rule surface 6 that is in close contact with the opening line 3a of the lower body opening 3. By the way, this door weather strip 2 is applied to the peripheral edge 1& of the door 1, for example, on the door sill 1b. When a continuous fishing rod is attached to the corner part 1e that connects the peak part IC and the front edge part 1d, the door weather strip 2 is attached to the pace part 5. The corner portion of the hollow knoll lip 7 is bent along the imaginary line because compression is applied to the seal surface 6 side of the hollow seal lip 7 and tension is generated to the outer circumference 8 side of the hollow seal lip 7. As shown in the figure, it collapses into the inside of the vehicle in a flat shape, causing problems with the vehicle's stability. For this reason, the corner part of the opening edge 3a is formed wide, or a corner piece is used in the corner part of the door weather strip 2, but in the former case, the door is closed when the door is closed. 1b is the opening edge 3a
In the latter case, manufacturing and assembly of the door weather strip 2 becomes troublesome.

For example, there is a method disclosed in Japanese Utility Model Application Publication No. 55-92518. This will be explained with reference to FIG. 5.6. The seal surface portion 6A of the hollow seal lip 7A integrally molded on the pace portion 5 of the two door weather strips is formed thick, and the inner end l of the retainer 4 is formed at the connecting portion between the pace portion 5 and the seal surface portion 6A. Formed flange 4I! The corner part 1 of the door is provided with a support groove 9 for connecting and fitting L.
Even if the hollow knoll lip 7A tries to collapse when two door weather strips are installed in succession on θ.

The support surface 9a of the support groove 9 is received on the outer surface of the flange 4, and the seal surface portion 6A protrudes, and the hollow seal lip 7A
This prevents the robot from collapsing and maintains the normal posture shown by the imaginary line in Figure 6.

Problems to be Solved by the Invention However, in this door weather strip 2A, the shape of the hollow seal lip 7A is maintained by the tensile force of the seal s6A, so when the door 1 is closed, the hollow seal lip 7
The knoll reaction force generated by the elastic deformation of A from the imaginary line position in FIG. 5 to the solid line position becomes strong, making it difficult to close the door.

Therefore, an object of the present invention is to provide an automobile door weather strip that can ensure the shape retention of the hollow seal lip and the door closing performance.

Means to Solve the Problem Not Invented - In this case, elastic deformation of the sealing surface when the door is closed is applied to a portion offset from the support groove toward the sealing surface at the connecting portion between the pace portion and the sealing surface of the hollow knoll rib. It forms a constriction that guides the outside.

EXAMPLES Below, an uninvented example will be described in detail with reference to the drawings, with the same reference numerals given to the same parts as the conventional structure.

In FIGS. 1 and 2, the door weather strip 2B is constructed by providing a support groove 9 that connects and fits into the flange 4a of the retainer 4 at a connecting portion 10 between the pace portion 5 and the seal surface portion 6A of the hollow seal lip 7B. has been done. This connecting part 1
A constricted portion 11 is formed at a portion offset from the support groove 9 toward the seal surface portion 6A to guide elastic deformation of the seal surface portion 6A outward when the door is closed. This constriction 11
is a V carved in the hollow part set 11 in the hollow seal lip 7B.
It is formed by a letter-shaped inner groove 12 and a V-shaped outer groove 3 carved in line with the support groove 9. The groove bottom of the inner groove 12 is located closer to the base portion 5, and the groove bottom of the outer groove 13 is positioned closer to the seal surface 6A. This buckling part is formed near the pace part 5 and is thin-walled so as to be elastically deformed in a dogleg shape toward the outside of the vehicle when the door is closed.The outer peripheral part extends from the buckling part 14 to the top of the seal surface 6A. 8 has a wall thickness ζ that is thinner than the round surface portion 6A gradually from the buckled portion 14 toward the seal surface portion 6A. is formed into a circular arc surface with small curvature.

According to the above embodiment, the IJ knob 2B is connected from the upper part IC of the door sash 1b to the corner part 1.
If the hollow seal lip 7B is installed continuously across the front edge 10 and 10b, the corner part of the hollow seal lip 7B
1 Compared to the case where the constriction part 11 is not formed, the constriction part 1
1, but this amount of collapse is due to the compression applied around the outer groove 13 while the support surface 9a of the support groove 9 is received by the flange 4a, The tension is extremely slight. and,
When closing the door 1, the front edge of the hollow lip 7B located on the door hinge 16 side comes into close contact with the opening edge 3a from the front edge to the corner, and from the corner to the upper edge (see FIG. 3). As the front edge near the opening comes closer to the opening edge 3a, the hollow 7-rip 7B at the corner
This torsion causes elastic deformation from the normal position shown by the temporary line in Figure 2 to the outside of the vehicle with the inner concave #12 of the constriction 11 as the axis, changing to the state shown by the single point line 51, Subsequently, the sealing surface portion 16A at the corner portion moves from the dashed-dotted line position to the position shown by the solid line, in close contact with the opening edge 3a.

By the way, the sealing surface portion 6 opposite to the opening edge 3aJ described above
When the door is closed, the area around the outer corner 15 collides with the opening edge 3a, and the sealing surface 6A is pushed toward the outside of the vehicle around the constriction 11, causing a buckling part. 14 undergoes elastic deformation in a dogleg shape while moving toward the outside of the vehicle, and as a result, the entire surface is in full contact under an appropriate sealing reaction force.

Here, in the above-mentioned example, the constriction @ll is formed by the inner and outer grooves 12.13, but it can also be formed by only one of the inner and outer grooves 12.13. There is an effect.

Note that the inner and outer grooves 12 and 13 may have shapes other than V-shape.

Effects of the Invention As described above, according to the present invention, by receiving the support groove in the flange, it is possible to guide the protruding sealing surface part so that it becomes a constriction part and elastically deforms outward when the door is closed. It is possible to ensure the shape retention of the hollow cool lip and the door closing performance without increasing the seal reaction force more than necessary.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is an explanatory view of the operation of the same embodiment, Fig. 3 is a perspective view showing the area around the automatic door with a lock, and Fig. 4 is a conventional door. FIG. 3 is a cross-sectional view taken along line IV-IV-1 in FIG. 3 showing the weather strip, FIG. 5 is a cross-sectional view showing a different conventional example, and FIG. 6 is an explanatory view of the operation of FIG. 8g5. j...Door, 2.2A, 2B...Door weather strip, 4...Retainer s4a...Flange, 5.
Base part, 6.6A... Seal surface part, 7.7A, 7B
...Hollow seal lip, 9...Support groove, to...
Connecting part, 11... constriction part. Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] a base portion fixed to the door periphery via a retainer;
A support groove into which a flange formed at the inner end of the retainer is elastically fitted is provided in a connecting portion of the hollow seal lip integrally formed on the base portion with the seal surface portion that is in close contact with the edge of the vehicle body opening. A door weather strip for an automobile, characterized in that a constricted portion is formed in a portion offset from the support groove of the connecting portion toward the sealing surface portion to guide elastic deformation of the sealing surface portion outward when the door is closed.