JP2006096119A - Weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weather strip capable of precluding generation of a folding wrinkle certainly by changing the shape of the lip part of the weather strip. <P>SOLUTION: The weather strip 1 is equipped with a weld part 5 formed approximately in a U-section from a first 2 and a second leg 3 and a coupling part 4 to couple them together and a hollow seal 6 formed rigidly on the outer side face of the weld part 5 and is attached to the peripheral edge of an opening by the weld part 5. The hollow seal part 6 is formed approximately in a triangular section from a vertical surface part 8 stretching perpendicularly to the outer surface of the second leg 3 along the coupling part 4 from the end on the coupling part 4 side of the second leg 3, a slope part 9 stretching straight from the forefront of the vertical surface part 8 toward the outer surface of the second leg 3 at the end on the opposite side to the coupling part 4 and continued to the mentioned outer surface, and the second leg 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a weather strip that is attached and used along an opening periphery of an opening of a vehicle body that is opened and closed by an opening and closing member such as a door.

  A weather strip shown in FIG. 8 is known as a weather strip that is attached and used along an opening periphery of an opening of a vehicle body that is opened and closed by an opening and closing member such as a door. The weather strip 101 has a cross-sectional view that includes a pair of leg portions (hereinafter referred to as first and second leg portions) 102 and 103 and a connecting portion 104 that connects the first and second leg portions 102 and 103. A welt portion 105 formed in a U-shape and a hollow seal portion 106 integrally formed on the outer surface of the welt portion 105 are provided. A cored bar 107 is embedded in the welt part 105. And it attaches to the said opening periphery by inserting the flange 201 of the opening periphery of the door opening part of a vehicle body between the 1st, 2nd leg parts 102 and 103 of the said welt part 105. FIG. As shown in FIGS. 9 and 10, the weather strip 101 is curved and used so that the connecting portion 104 of the welt portion 105 is inside (inside) at the corner portion C of the opening periphery.

  As shown in FIG. 8, the hollow seal portion 106 extends from the vicinity of the end portion on the connecting portion 104 side of the outer surface of the second leg portion 103 of the welt portion 105 to the outer surface of the second leg portion 103. An inside surface 108 extending downward at a predetermined inclination angle θ1 (approximately 120 °) and extending upward at a predetermined inclination angle θ2 (approximately 120 °) along the way, and the inside surface 108 is extended upward from the tip of 108 at a predetermined inclination angle θ3 (approximately 120 °) and extended downward at a predetermined inclination angle θ4 (approximately 120 °) from the middle. The outer surface 109 of the leg portion 103 is formed in a substantially rhombic cross section by an outside surface 109 continuous in the vicinity of the end opposite to the connecting portion 104. For this reason, in the hollow seal portion 106, as shown in FIG.

  When the weather strip 101 is bent so that the connecting portion 104 of the welt portion 105 is inward at the corner portion C of the opening periphery, as shown in FIG. Since the vertical axis CL exists along the connecting portion 104 of the welt portion 105, the hollow seal portion 106 rises so-called vertically with respect to the second leg portion 103 as indicated by a solid line from a state indicated by a broken line. It is because it transforms into.

In order to prevent the occurrence of the crease 110, as shown in FIG. 12, the intermediate portion of the outer surface of the second leg portion 103 facing the center of the hollow portion of the hollow seal portion 106 is more than the welt portion 105. A weather strip in which the hard portion 111 is formed of a hard material and the weather strip is curved with the hard portion 111 as a central axis of curvature (neutral axis), thereby preventing the folding seal 110 from being generated in the hollow seal portion 106. Has been developed. (For example, see Patent Document 1)
JP 2002-240649 A (paragraph 0003, paragraph 0007, paragraph 0008, paragraph 0018 to paragraph 0020, etc.)

  By the way, the weather strip of the above-mentioned patent document 1 is complicated because the resin molding process of the weather strip becomes complicated due to the property that the hard portion 111 is formed of a material harder than the welt portion 105 on the second leg portion 103. The cost of For this reason, there has been a demand for the development of a weather strip that can prevent the occurrence of creases without forming the hard portion.

  An object of the present invention is to meet the above-mentioned demand, and is to provide a weather strip that can surely prevent the occurrence of the creases without forming the hard portion.

  According to the first aspect of the present invention, there is provided a welt portion formed in a substantially U-shaped cross section by a pair of leg portions and a connecting portion connecting the pair of leg portions, and a hollow formed integrally on the outer surface of the welt portion. A weather strip, which is attached to the periphery of the opening of the vehicle body by the welt portion, and is used by being bent so that the connecting portion of the welt portion is inward at a corner portion of the opening periphery. A vertical surface portion extending in a direction perpendicular to the outer surface of the one leg portion along the connecting portion from the end portion of the one leg portion of the pair of leg portions on the connecting portion side; An inclined surface portion extending straight from the front end portion of the vertical surface portion toward the outer surface of the end portion on the side opposite to the connecting portion of the one leg portion and continuing to the outer surface of the one leg portion; and the one leg Section and by a cross-section approximately triangular It was formed in.

  According to a second aspect of the present invention, there is provided a welt portion formed in a substantially U-shaped cross section by a pair of leg portions and a connecting portion connecting the pair of leg portions, and a hollow formed integrally on the outer surface of the welt portion. A seal portion, and is attached to the opening periphery of the vehicle body by the welt portion, and is used by being curved so that one leg portion of the pair of leg portions is inward at a corner portion of the opening periphery. In the weather strip, the outer surface of the connecting portion extends along the one leg portion from the end portion on the connecting portion side of the one leg portion that is curved inwardly at the corner portion of the peripheral edge of the opening. A vertical surface portion extending in a direction perpendicular to the vertical surface portion, an inclined surface portion extending in a straight line from the front end portion of the vertical surface portion toward the end portion side of the other leg portion and continuing to the connecting portion, and an outer surface of the connecting portion; , By cross section It was formed at the corner shape.

  According to a third aspect of the present invention, in the weather strip according to the first or second aspect, a notch for suppressing a reaction force of the vertical surface portion is provided in the vertical surface portion of the hollow seal portion.

  The weather strip according to claim 1 is an extension line of the bending neutral axis that exists along the connection portion of the welt portion when the connection portion of the welt portion is curved inward at the corner portion of the opening periphery of the vehicle body. Further, since the vertical surface portion of the hollow seal portion is located, deformation of the hollow seal portion at the corner portion is suppressed, and the occurrence of creases at the corner portion is prevented. Therefore, it is possible to prevent occurrence of creases at the corner portion by a simple method of changing the shape of the hollow seal portion without forming a hard portion on the leg portion of the welt portion as in Patent Document 1. it can.

  The weather strip according to claim 2 is an extension of a neutral axis of bending existing along one leg when the one leg of the welt is curved at the corner of the opening periphery of the vehicle body. Since the vertical surface portion of the hollow seal portion is located on the line, the deformation of the hollow seal portion at the corner portion is suppressed, and the occurrence of creases at the corner portion is prevented.

  The weather strip according to claim 3 is the weather strip according to claim 1 or 2, wherein the notch that suppresses the reaction force of the vertical surface portion is provided in the vertical surface portion of the hollow seal portion, so that the lip when the door is closed is provided. The portion can be smoothly bent to sufficiently exhibit the function of the hollow seal portion as a seal.

  1 to 3 show a body side weather strip (hereinafter referred to as a weather strip) as a first embodiment of the present invention, FIG. 1 is a sectional view, FIG. 2 is a perspective view of a corner portion, and FIG. It is AA sectional drawing. The weather strip 1 has a cross-sectional view that includes a pair of leg portions (hereinafter referred to as first and second leg portions) 2 and 3 and a connecting portion 4 that connects the first and second leg portions 2 and 3. A welt portion 5 formed in a U-shape and a hollow seal portion 6 integrally formed on the outer surface of the welt portion 5 are provided. A cored bar 7 is embedded in the welt part 5. The weather strip 1 is held on the flange 201 by a lip 8 extending from the opposed inner surfaces of the first and second legs 2 and 3.

  The hollow seal portion 6 has a vertical surface portion 9 extending in a direction perpendicular to the outer surface of the second leg portion 3 along the connecting portion 4 from the end portion of the second leg portion 3 on the connecting portion 4 side. And extending from the tip of the vertical surface portion 9 in a straight line toward the outer surface of the end of the second leg 3 opposite to the connecting portion 4 (end on the free end). The inclined surface portion 10 continuous with the outer surface of the leg portion 3 and the second leg portion 3 are formed in a substantially right triangle shape in cross section. The welt part 5 is made of a hard material such as solid rubber, and the hollow seal part 6 is made of a soft material such as sponge rubber.

  Next, the operation of the weather strip 1 of the first embodiment will be described. As shown in FIG. 2, the weather strip 1 is used by being bent so that the connecting portion 4 is inside (inside) at the corner portion of the opening periphery. When the weather strip 1 is curved so that the connecting portion 4 is on the inside, as shown in the sectional view of FIG. 3, the bending neutral axis CL is connected to the connecting portion 4 of the welt portion 5 and the hollow seal continuous therewith. It exists along the vertical surface portion 9 of the portion 6. On the other hand, the inclined surface portion 10 of the hollow seal portion 6 connects the tip of the vertical surface portion 9 and the end of the second leg 3 opposite to the connecting portion 4 in a straight line, so that the corner portion 11, the hollow seal portion is prevented from being deformed so as to stand up with respect to the leg portion as in the conventional example shown in FIG. 11, so that the vertical surface portion 9 and the inclined surface portion 10 of the hollow seal portion 6 are folded. To prevent the occurrence of.

  4 to 6 show a trunk weather strip (hereinafter referred to as a weather strip) as a second embodiment of the present invention. As in the case of the first embodiment, the weather strip 1 includes first and second leg portions 2 and 3 and a connecting portion 4 that connects the first and second leg portions 2 and 3. A welt portion 5 having a substantially U-shaped cross section and a hollow seal portion 6 integrally formed on the outer surface of the welt portion 5 are provided. A cored bar 7 is embedded in the welt part 5. The weather strip 1 is held by a flange 201 at the periphery of the opening of the trunk room of the vehicle body by a lip 8 extending from the opposed inner surfaces of the first and second legs 2 and 3.

  The hollow seal portion 6 extends along the second leg 3 from the end on the second leg 3 side of the connecting portion 4 that is curved inwardly at the corner portion C of the opening periphery. A vertical surface portion 9 extending in a direction perpendicular to the outer surface of the first surface portion, and extending straight from one end of the vertical surface portion 9 toward one end side of the first leg portion 2 and continuing to the outer surface of the connecting portion 4. The inclined surface portion 10 and the outer surface of the connecting portion 4 are formed in a substantially triangular cross section. The welt part 5 is made of a hard material such as solid rubber, and the hollow seal part 6 is made of a soft material such as sponge rubber.

  Next, the operation of the weather strip 1 of the second embodiment will be described. As shown in FIG. 4, the weather strip 1 according to the second embodiment is used by being curved so that the second leg portion 3 is inside (inside) at the corner portion of the peripheral edge of the opening.

  When the weather strip 1 is bent so that the second leg portion 3 is on the inside, as shown in FIG. 6, the bending neutral axis CL is the second leg portion 3 and the hollow seal portion continuous therewith. 6 exist along the vertical surface portion 9. On the other hand, since the inclined surface portion 10 of the hollow seal portion 6 connects the tip of the vertical surface portion 9 and the connecting portion 4 in a straight line, the hollow seal portion rises with respect to the connecting portion at the corner portion. It is prevented from being deformed, and it is possible to reliably prevent creases from occurring on the vertical surface portion 9 and the inclined surface portion 10 of the hollow seal portion 6 even at the corner portion.

  FIG. 7 shows a body side weather strip (hereinafter referred to as a weather strip) as a third embodiment of the present invention. In this embodiment, the vertical surface portion 9 of the hollow seal portion 6 is provided with a notch 11 that suppresses the reaction force of the vertical surface portion 9. The notch 11 is formed inside the hollow portion. When the door 202 hits the tip of the hollow seal portion 6 when the door is opened and closed, the vertical surface portion 9 is surely bent at the notch 11 and the reaction force of the vertical surface portion 9 is suppressed, so that the hollow seal portion 6 Is smoothly bent to fully exert its function as a seal. Since other configurations are the same as those in the first embodiment, a duplicate description is omitted.

Sectional drawing of 1st Embodiment. The perspective view of a corner part. AA sectional drawing of FIG. Sectional drawing of 2nd Embodiment. The perspective view of a corner part. AA sectional drawing of FIG. Sectional drawing of 3rd Embodiment. Sectional drawing of a prior art example. The side view of a use condition. The perspective view of a corner part. AA sectional drawing of FIG. Sectional drawing of another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Weather strip, 2 ... 1st leg part, 3 ... 2nd leg part, 4 ... Connection part, 5 ... Welt part, 6 ... Hollow seal part, 7 ... Core metal, 9 ... Vertical surface part, 10 ... Inclination Surface part, 11 ... notch, 201 ... flange, 202 ... door.

Claims (3)

A welt portion formed in a substantially U-shaped cross section by a pair of leg portions and a connecting portion connecting the pair of leg portions, and a hollow seal portion integrally formed on the outer surface of the welt portion, A weatherstrip that is attached to the periphery of the opening of the vehicle body by the welt part, and is used by being curved so that the connecting part of the welt part is inside at a corner part of the periphery of the opening;
The hollow seal portion includes a vertical surface portion extending in a direction perpendicular to the outer surface of the one leg portion along the connecting portion from an end portion of the one leg portion of the pair of leg portions on the connecting portion side. An inclined surface portion extending straight from the front end portion of the vertical surface portion toward the outer surface of the end portion opposite to the connecting portion of the one leg portion and continuing to the outer surface of the one leg portion, A weather strip having a substantially triangular cross section by a leg portion. A welt portion formed in a substantially U-shaped cross section by a pair of leg portions and a connecting portion connecting the pair of leg portions, and a hollow seal portion integrally formed on the outer surface of the welt portion, A weatherstrip that is attached to the periphery of the opening of the vehicle body by the welt part, and is used by being curved so that one leg of the pair of legs is inward at a corner part of the periphery of the opening;
The hollow seal portion is formed on an outer surface of the connecting portion along one leg portion curved inward from an end portion on the connecting portion side of the one leg portion curved inward at a corner portion of the opening peripheral edge. A vertical surface portion extending in a right angle direction from the front end portion, an inclined surface portion extending straight from the front end portion of the vertical surface portion toward the end portion of the other leg portion and continuing to the connecting portion, and an outer surface of the connecting portion. A weatherstrip formed in a substantially triangular shape. The weather strip according to claim 1 or 2, wherein the hollow seal portion includes a notch for suppressing a reaction force when the door is closed on the vertical surface portion.

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