JP2005075168A - Weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weather strip which is improved in closing property of a door by reducing the seal reaction force of a hollow lip part of an opening/closing body such as a door or the like while being equipped with sealing property between the opening/closing body and a vehicle body. <P>SOLUTION: The weather strip (inner weather strip 2) has a mounting portion 21 to be mounted on a flange portion 45 provided on the peripheral edge of the opening portion 44 of the vehicle body 4. The mounting portion 21 is provided with the hollow lip portion 24 which is formed integrally and continuously with the mounting portion 21 and is pressed against the opening/closing body 41 to close the opening portion 44. The hollow lip portion 24 has one root part 24a formed nearer to the center portion side than the other root part 24b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a weather strip that is installed at the periphery of an opening of a vehicle body to which an opening / closing body such as an automobile door is attached.

  2. Description of the Related Art Conventionally, a flange portion is formed along the periphery of an opening of a vehicle body that opens and closes an opening / closing body such as a door of an automobile, and a weather strip is attached to the flange portion. The weather strip is made of a long and narrow synthetic rubber packing, and is used, for example, to press the door and seal the interior of the vehicle when the door is closed. The passenger compartment is configured to prevent rainwater, outside air, sound, dust, and the like from entering by attaching a weather strip to the opening, and to absorb an impact when the door is closed. Further, some weather strips have a hollow portion formed at a location where the door is pressed to improve water tightness, air tightness and sound insulation (for example, Patent Document 1).

  FIG. 4 is a view showing the structure of a weather strip having a conventional hollow part, and is an enlarged perspective view of a main part having a cross section of one part.

As shown in FIG. 4, the conventional weather strip 100 includes an attachment portion 110, a hollow lip portion 120, and a core metal 130. The attachment portion 110 is formed to fix the weather strip 100 to the vehicle body 200 by press-fitting to a flange portion 210 formed at the periphery of an opening (not shown) of the vehicle body 200.
The attachment portion 110 is formed of a groove formed in a substantially U-shape, and a plurality of protrusions 111 that press against the front and back surfaces of the flange portion 210 protrude inward on the inner side wall surface 112 of the attachment portion 110. Is formed. The mounting portion 110 maintains watertightness, airtightness, and sound insulation between the weather strip 100 and the vehicle body 200 by the protrusion 111 being pressed against the flange portion 210.
The hollow lip 120 is formed such that when the door 220 is closed, the outer peripheral edge 221 of the door 220 is brought into pressure contact with the door 220. The weather strip 100 maintains the water tightness, air tightness, and sound insulation between the weather strip 100 and the door 220 by the hollow lip portion 120 being in pressure contact with the outer peripheral edge 221 of the door 220.
JP 2002-239200 A (paragraph 0017, FIG. 2)

  In the weather strip 100 of the prior art (Patent Document 1) shown in FIG. 4, a long pipe-shaped hollow lip 120 is formed at a contact point with the door 220. For this reason, when the weather strip 100 closes the door 220, the entire hollow lip 120 is pressed by the door 220 and deformed. By this deformation, the air in the hollow lip 120 moves instantaneously. As described above, when the door 220 is opened and closed, the air in the hollow lip 120 is compressed as the hollow lip 120 is deformed, and enters and exits the hollow lip 120. For this reason, the sealing reaction force of the weather strip 100 becomes large, and there is a problem that the closing property of the door 220 is deteriorated.

  An object of the present invention is to provide a weather strip that has a sealing property between an opening / closing body such as a door and a vehicle body, and that improves a door closing property by reducing a sealing reaction force of a hollow lip portion when the opening / closing body is closed. The purpose is to provide.

  In order to solve the above-described problem, the weather strip according to claim 1 is a weather strip having a mounting portion attached to a flange portion provided at a peripheral edge of an opening of a vehicle body. A hollow lip portion that is formed integrally with the attachment portion and press-contacts the opening / closing body that closes the opening portion is provided, and one of the root portions of the hollow lip portion is closer to the center side than the other root portion. It is characterized by being formed.

  According to the first aspect of the present invention, when the opening / closing body is closed, the weather strip is compressed by being pressed against the hollow lip portion. At this time, the hollow lip portion is formed such that one root portion is closer to the center portion side than the other root portion, so that a pressing force when closing the opening / closing body is applied to one and the other root portion, It becomes easy to deform | transform so that a hollow lip part may fall down centering on the root part. For this reason, since the hollow lip portion has a low sealing reaction force and is easily deformed, it adheres closely to the opening / closing body, so that the sealing properties such as watertightness, waterproofness and airtightness (hereinafter simply referred to as “sealability”). And the closing performance of the opening / closing body can be improved.

  The weather strip according to claim 2 is the weather strip according to claim 1, wherein the one root portion is formed at an acute angle with respect to the attachment portion.

  According to the invention described in claim 2, when the weather strip is closed at the time of closing the opening / closing body, one root portion of the hollow lip portion is formed at an acute angle with respect to the attachment portion. When the pressing force is applied to one of the root portions, the base portion deforms so as to fall down with a weak force around the root portion. For this reason, the hollow lip portion has a seal reaction force that is low and has a shape that is easily deformed so that the root portion collapses, thereby maintaining the sealing performance and sound insulation performance by the weather strip, and the closing performance of the opening and closing body. Can be improved.

  The weather strip according to claim 3 is the weather strip according to claim 1 or 2, wherein the hollow lip portion is provided with a bent portion.

  According to the third aspect of the present invention, the weather strip is formed such that the bent portion is deformed by the pressing force of closing the opening / closing body when the opening / closing body is closed by forming the bending portion in the hollow lip portion. become. For this reason, the hollow lip portion is shaped to be easily deformed so as to fall down due to the bent portion, and it is possible to improve the closing performance of the opening / closing body while maintaining the sealing performance and the sound insulation performance of the opening / closing body by the weather strip. it can.

  The weather strip according to claim 4 is the weather strip according to any one of claims 1 to 3, wherein a sticking prevention means is provided in the hollow lip portion on the one root portion side. It is characterized by being.

  According to the invention described in claim 4, when the weather strip is closed, the opening / closing body is pressed against the hollow lip portion and compressed, and one root portion and the inner wall of the hollow lip portion are connected. Press contact. At this time, the hollow lip portion is prevented from sticking to the inner wall of the hollow lip portion by providing the sticking prevention means on the hollow lip portion on the one root portion side. For this reason, the hollow lip portion prevents the generation of sticking sound that occurs when one root portion sticks to the inner wall of the hollow lip portion, and the one root portion remains attached to the inner wall of the hollow lip portion. Thus, it is possible to prevent the deformation of the hollow lip portion from being hindered and the buffering property when closing the opening / closing body from being lowered.

  The weather strip according to claim 5 is the weather strip according to any one of claims 1 to 4, wherein the hollow lip portion on the one root portion side is in a state where the opening / closing body is closed. Sometimes it is separated from the attachment part.

  According to the fifth aspect of the present invention, the hollow lip portion of the weather strip has the hollow lip portion on one root portion side away from the attachment portion when the opening / closing body is closed. Thereby, the hollow lip portion can be pressed against the attachment portion or the flange portion and pressed against each other to prevent the seal reaction force from rapidly increasing.

  The weather strip according to claim 6 is the weather strip according to claim 5, wherein a flange holding lip is formed in the attachment portion, and the flange holding lip is close to the hollow lip portion. The flange holding lip on the side to be formed is formed to be smaller than other flange holding lips installed on the opposite position side in the mounting portion.

  According to the sixth aspect of the present invention, the flange holding lip formed on the attachment portion includes a flange holding lip on the side close to the hollow lip portion, which is disposed on the opposite position side in the attachment portion. It is formed smaller than the flange holding lip. As a result, the position of the attachment portion can be retracted as much as possible in the in-vehicle direction, so that it is possible to prevent the hollow lip portion from being pressed against the attachment portion and the seal reaction force from increasing rapidly as much as possible.

In the weather strip, it is desirable that the position of the apex of the hollow lip portion that is in pressure contact with the door seal surface of the opening / closing body is shifted from the one root portion toward the bent portion.
By forming the top of the hollow lip so as to be shifted in this manner, when the hollow lip is pressed against the door seal surface, first, the entire hollow lip is deformed so as to fall down to the mounting part centering on the root part. To do. Further, when the hollow lip portion is pressed, the bent portion is easily bent so as to be folded by the pressing force for closing the opening / closing body, and thus is easily deformed. And since a hollow lip part is deformed so that it may bend and lie down centering on a bending part and a root part, it comes to bend and deform with weak force. Therefore, when the door lip surface is in pressure contact with each other, the hollow lip portions can be in close contact with each other to ensure the sealing performance, and the closing performance of the opening / closing body can be improved.

According to the weather strip according to the present invention, the weather strip is easily deformed so that the hollow lip portion falls around the root portion when the opening / closing body is closed. For this reason, since the hollow lip portion has a low sealing reaction force and is easily deformed, the hollow lip portion is in close contact with the opening and closing body, so that the closing performance of the opening and closing body is improved while maintaining sealing performance and sound insulation. Can do.
Further, the weather strip is provided with a sticking prevention means on the hollow lip portion on one root portion side, so that when the opening / closing body is closed, one root portion sticks to the inner wall of the hollow lip portion. Is prevented. For this reason, the hollow lip portion prevents the generation of sticking sound that occurs when one root portion sticks to the inner wall of the hollow lip portion, and the one root portion remains attached to the inner wall of the hollow lip portion. Thus, it is possible to prevent the deformation of the hollow lip portion from being hindered and the buffering property when closing the opening / closing body from being lowered.
When the opening / closing body is closed, the hollow lip portion of the weather strip is pressed against the mounting portion or the flange portion because the hollow lip portion on one root portion side is separated from the mounting portion. Then, they can be pressed against each other to prevent the seal reaction force from rapidly increasing.
When the flange holding lip is closed, the flange holding lip on the side close to the hollow lip is formed smaller than the other flange holding lip installed on the opposite position side in the mounting part. In addition, the attachment portion can be deformed so as to be retracted in the direction in which the opening / closing body is closed. For this reason, the flange-holding lip can prevent the hollow lip portion from coming into pressure contact with the mounting portion to increase the seal reaction force.

The weather strip according to the embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a view showing a weather strip according to an embodiment of the present invention, and is a side view of a vehicle showing an installed state of the weather strip. FIG. 2 is an enlarged cross-sectional view in the direction of the arrow XX in FIG. FIG. 3 is an enlarged cross-sectional view showing a weather strip according to an embodiment of the present invention.

As shown in FIG. 1, the opening / closing body 41 is, for example, a door, a back door, a bonnet, and a trunk that are arranged at the front, rear, left, and right seats of the vehicle body, and includes a hinged door, a sliding door, a gull wing door, and the like. Become. The form of the opening / closing body 41 is not particularly limited.
Hereinafter, an embodiment of the present invention will be described with reference to an example of a weather strip that is installed in an opening 44 of a hinge-type door 42 in a front row left seat (passenger seat) that pivots around a hinge and opens rearward.

First, the weather strip 1 will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the weather strip 1 is attached to a flange portion 45 (see FIG. 3) formed at the periphery of the opening 44 of the opening / closing body 41 such as the door 42 and the trunk lid 43 of the vehicle body 4. The weather strip 1 has a sealing property for preventing rainwater from entering the vehicle interior 46, preventing air from entering, and preventing noise, and a buffering property for buffering an impact when the opening / closing body 41 is closed.
The weather strip 1 includes an inner weather strip 2 installed on the inside 46 side of the opening 44 and an outer weather strip 3 installed on the outside 47 side of the opening 44 in order to improve sealing performance and sound insulation. The two have a double sealing structure made of a sealing member.

Next, the inner weather strip 2 will be described with reference to FIGS. 2 and 3.
As shown in FIG. 2, the inner weather strip 2 includes a hard material 22 for forming a base portion such as the attachment portion 21, and a soft material for forming a hollow lip portion 24 that is molded into the hard material 22 in two colors. The material 23 and the core metal 5 insert-molded in the hard material 22 are integrally formed. The inner weather strip 2 is attached to the peripheral edge of the opening 44 of the vehicle body 4 by attaching the attachment portion 21 to the hanging flange portion 45. The inner weather strip 2 is installed toward the sash 42f of the opening / closing body 41 so that the hollow lip portion 24 is pressed almost orthogonally to the opening / closing body 41 when the opening / closing body 41 is closed.
The inner weather strip 2 corresponds to a “weather strip” recited in the claims.

The hard material 22 is made of hard synthetic rubber or synthetic resin so that the shape of the mounting portion 21 of the inner weather strip 2 does not collapse. In the hard material 22, the metal core 5 made of a metal plate is insert-molded, and the attachment portion 21 formed of the hard material 22 is coated with a decorative material 6 that is a hard material that has been colored, The structure is difficult to deform.
The soft material 23 is formed of soft synthetic rubber, soft synthetic resin, or the like, and is formed so as to be in close contact with the pressed vehicle body 4 or the opening / closing body 41.

The attachment portion 21 is a portion formed to attach the inner weather strip 2 to the flange portion 45, and is formed from a groove having a substantially U-shaped cross section. A flange holding lip 21c is formed on the side wall 21a on the vehicle exterior 47 side (side close to the hollow lip portion 24) in the mounting portion 21, and a flange holding lip 21d is formed on the side wall 21b on the vehicle interior 46 side. Is formed.
Note that an adhesive seal material (not shown) made of butyl rubber or the like into which the tip 45a of the flange 45 is press-fitted is applied to the rear wall 21f of the attachment 21 so that the flange 45 and the attachment 21 You may improve the sealing between.

The flange-holding lips 21c and 21d are so-called lip packings that project inward from the left and right inner side walls 21a and 21b, and press-contact the front and back surfaces of the flange portion 45 to seal the inside of the mounting portion 21. Has a role. The flange holding lips 21c and 21d are formed obliquely in the direction toward the inner wall 21f of the mounting portion 21 so that the flange portion 45 can be easily press-fitted and difficult to come off.
The flange holding lip 21c includes a plurality of projections smaller than the flange holding lip 21d, and is formed so as to be in pressure contact with the surface of the flange portion 45 on the vehicle exterior 47 side.
The flange holding lip 21d is formed of a protruding piece that is formed to protrude obliquely from the vicinity of the opening end 21e of the mounting portion 21 toward the back, and is formed to protrude longer than the flange holding lip 21c formed on the opposite position side. Yes.
The flange holding lip 21d corresponds to “another flange holding lip” recited in the claims.

As shown in FIG. 2, when the inner weather strip 2 is attached to the flange portion 45 and the door 42 is closed, the hollow lip portion 24 comes into close contact with the door seal surface 42a of the door 42 when the front end portion 45a is in close contact with it. It has a packing function that prevents rainwater, outside air, and the like from entering and entering the vehicle interior 46 from between the door seal surface 42a and the flange portion 45.
The hollow lip portion 24 is a seal portion integrally formed by the soft material 23 continuously to the outer wall 21g on the vehicle exterior 47 side of the attachment portion 21, and has a pipe-shaped hollow portion 23a having a substantially elliptical cross section. The hollow lip portion 24 has elasticity that biases in the direction of the door 42, and is disposed at a position where the peripheral portion of the door 42 that closes the opening 44 of the vehicle body 4 abuts.
The hollow lip portion 24 is formed with root portions 24a and 24b that are continuous with the outer wall 21g of the attachment portion 21 at the lower end and the upper end, respectively. It is installed on the formed pedestal 21h, and the root portion 24b at the upper end is installed at the upper end of the outer wall 21g. That is, the hollow lip portion 24 is formed such that one (lower end) root portion 24a is closer to the center than the other (upper end) root portion 24b.

And since the root part 24a was formed on the base 21h, the root part 24a side of the hollow lip part 24 is arrange | positioned away from the outer wall 21g of the attaching part 21. FIG. As shown in FIG. 3, the root portion 24a has an acute angle (about 20 °) with respect to the outer wall 21g of the mounting portion 21 so that the door seal surface 42a is closed when the door 42 (see FIG. 2) is closed. It is easy to bend by being pressed.
The root portion 24b is formed at the upper end portion of the outer wall 21g, and the angle θ2 with respect to the outer wall 21g of the attachment portion 21 is formed at about 60 °, and is formed wider than the angle θ1 of the root portion 24a.
Therefore, in the hollow lip portion 24 having a substantially elliptical cross section, the apex P that is first pressed when the door 42 (see FIG. 2) is closed is lower than the center line (OO) as shown in FIG. The bent portion 24c is located at a position shifted by a distance L toward the bent portion 24c side, and the bent portion 24c has an oblique substantially oval shape close to the door seal surface 42a (see FIG. 2).

Bent portions 24c and 24d are formed at the lowermost end and the uppermost end of the hollow lip portion 24 in order to smoothly bend each when the pressing surface 24e is pressed against the door seal surface 42a of the door 42. The bent portions 24c and 24d are formed so as to be bent at an acute angle, and when the pressing surface 24e is pressed against the door seal surface 42a of the door 42, the left and right sides of the bent portions 24c and 24d are easily deformed. Yes.
An inner wall 24f of the pressing surface 24e is formed on the inner wall surface between the lowermost bent portion 24c and the root portion 24a when the pressing surface 24e is pressed by the door seal surface 42a and the hollow lip portion 24 is compressed. A sticking preventing portion 24g for preventing sticking is formed. The sticking prevention part 24g is composed of, for example, a plurality of convex parts and concave-convex parts integrally formed on the inner wall surface of the hollow lip part 24.
The sticking prevention portion 24g corresponds to “sticking prevention means” described in the claims.

Next, the opening 44 of the vehicle body 4 will be described with reference to FIG.
The opening 44 is formed of a metal plate as shown in FIG. 2, and includes a first vehicle body seal surface 44 a and a second vehicle body seal surface 44 b to which the outer weather strip 3 is pressed from the vehicle exterior 47 side toward the vehicle interior 46 side, A flange portion 45 on which the inner weather strip 2 is installed is formed.

  The flange 45 is made of a metal plate formed at the periphery of the opening 44 (see FIG. 1) of the vehicle body 4, and the front end 45 a is bent toward the door 42 that closes the opening 44.

Next, the door 42 will be described with reference to FIG.
The peripheral portion of the door 42 on which the weather strip 1 is disposed is roll-formed hemming processed by bending, for example, one rolled steel plate. Holding portions 42c and 42d to which the outer weather strip 3 is attached are formed on the vehicle interior 46 side of the outer peripheral edge 42b, and a fitting groove 42e for attaching the run channel 7 is provided below the holding portions 42c and 42d. The door seal surface 42a is formed on the inside 46 side of the fitting groove 42e.

  The holding portion 42 c and the holding portion 42 d are formed at a parallel interval with each other along the vehicle interior 46 side of the outer peripheral edge 42 b of the door 42. The fitting groove 42e is formed in the sash 42f of the door 42, and a step part 42g for preventing the fitted run channel 7 from falling off is formed on the inner wall surface. The door seal surface 42a is a vertical surface formed by forming the hollow region 42h continuously with the fitting groove 42e by the rolled steel plate forming the sash 42f, and when the door 42 is closed In this case, the hollow lip 24 of the inner weather strip 2 is pressed.

Next, the outer weather strip 3 will be described with reference to FIG.
As shown in FIG. 2, the outer weather strip 3 is a sealing material provided to provide a sealing property and a sound insulating property between the door 42 and the opening 44 on the vehicle exterior 47 side, and is made of synthetic rubber or synthetic resin. It is formed from. The outer weather strip 3 includes an attachment portion 31 for attachment to the door 42, a tongue-like first seal portion 32, a hollow second seal portion 33, and a cavity portion 34 formed in the central portion. It is configured.

The attachment portion 31 is fixed to the door 42 so as to be held by the holding portions 42c and 42d.
The first seal portion 32 is formed so as to protrude substantially upward from the vehicle exterior 47 side of the attachment portion 31 and further upward from the outer peripheral edge 42b, and when the door 42 is closed, the horizontal first vehicle body on the vehicle exterior 47 side is formed. It arrange | positions so that it may contact | adhere to the sealing surface 44a.
The second seal portion 33 is a hollow seal portion formed obliquely upward from the attachment portion 31 toward the vehicle interior 46, and is substantially L that is suspended from the first vehicle body seal surface 44a when the door 42 is closed. It arrange | positions so that it may closely_contact | adhere to the character-shaped 2nd vehicle body seal surface 44b.

Next, the run channel 7 will be described with reference to FIG.
The run channel 7 is a seal member that is attached to the fitting groove 42e of the sash 42f and seals between the sash 42f and the window glass 8, and is made of synthetic rubber or synthetic resin. The run channel 7 forms a recess 7 a into which the peripheral edge of the window glass 8 is inserted. In the recess 7a, lip portions 7b, 7c, and 7d having sealing properties that are in close contact with the inserted window glass 8 are formed.

Next, the operation of the weather strip according to the embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the inner weather strip 2 is attached to the flange portion 45 of the opening 44 of the vehicle body 4. When the inner weather strip 2 is fitted into the flange portion 45, the flange holding lips 21 c and 21 d are brought into pressure contact with the surface on the vehicle exterior 47 side and the surface on the vehicle interior 46 side of the flange portion 45. For this reason, the inner weather strip 2 is provided with a sealing property and a soundproofing property in the flange portion 45 by the flange holding lips 21c and 21d.
When the door 42 is open, the hollow lip portion 24 is not loaded with an external force because the door seal surface 42a of the door 42 is separated from the hollow lip portion 24. Therefore, the imaginary line in FIG. ) Inflated as shown by).

As shown in FIG. 2, the outer weather strip 3 is attached to the inside 46 side of the outer peripheral edge 42 b of the door 42. The outer weather strip 3 comes into close contact with the inner walls of the holding portions 42c and 42d when the mounting portion 31 is fitted into the holding portions 42c and 42d of the sash 42f. For this reason, the outer weather strip 3 is provided with a sealing property and a soundproofing property at the peripheral portion 42 b of the door 42 by the elasticity of the attachment portion 31.
When the door 42 is open, the first seal portion 32 and the second seal portion 33 are separated from the first vehicle body seal surface 44 a and the second vehicle body seal surface 44 b of the opening 44 of the vehicle body 4, thereby causing the door 42. Since the pressing force from is not loaded, it is in a swelled state as indicated by an imaginary line in FIG.

  When the door 42 is closed, the door seal surface 42 a of the door 42 comes into pressure contact with the hollow lip portion 24 of the inner weather strip 2. At the same time, in the outer weather strip 3, the first seal portion 32 is pressed against the first vehicle body seal surface 44a of the opening 44 of the vehicle body 4, and the second seal portion 33 is pressed against the first vehicle body seal surface 44a. Seal twice. Between the door 42 and the opening 44, the outside 47 side is sealed with the outer weather strip 3, and the inside 46 side is sealed with the inner weather strip 2, so that the sealing is extremely good. It is good.

  More specifically, as shown in FIG. 3, when the door 42 (see FIG. 2) is closed, the door 42 enters the opening 44 in the horizontal direction indicated by the arrow F. A horizontal force indicated by an arrow F is applied to the vertex P. With respect to the force in the direction of arrow F, the hollow lip portion 24 has elasticity of a seal reaction force R that is a force in a direction opposite to the direction of arrow F. Due to this elasticity, the hollow lip portion 24 can alleviate the impact force when the door 42 is closed, and can reduce the sound when the door 42 is closed.

As shown in FIG. 3, the hollow lip portion 24 pressed by the door seal surface 42a is formed with bent portions 24c and 24d and sharp root portions 24a and 24b at the upper and lower ends.
The apex P of the hollow lip portion 24 is located at a distance L away from the horizontal center line (OO) of the hollow lip portion 24 toward the lower bent portion 24c, and the root portion 24a is hollow. It is arranged on the center side of the lip portion 24. For this reason, when the hollow lip portion 24 is pressed against the door seal surface 42a, first, the entire hollow lip portion 24 is deformed so as to fall down toward the lower side of the outer wall 21g around the root portion 24a. When 24 is pressed, the bent portions 24c and 24d are easily bent and deformed so as to be folded by the pressing force in the direction of the vehicle interior 46 indicated by the arrow F. Therefore, the bent portions 24c and 24d are easily deformed. The hollow lip portion 24 is deformed so as to be folded and laid down around the bent portions 24c and 24d and the root portions 24a and 24b, so that the hollow lip portion 24 is compressed and deformed with a weak force. Therefore, the hollow lip portion 24 can be brought into close contact with each other when the door seal surface 42a is in pressure contact with each other to ensure the sealing property, and the closing property of the opening / closing body can be improved.
Since the hollow lip portion 24 has bending portions 24c and 24d and root portions 24a and 24b that are easily deformed, there are few places to be deformed by being pressed by the door seal surface 42a. The seal reaction force R when closed is also small. Further, the hollow lip portion 24 is deformed so that the entire hollow lip portion 24 collapses when the door 42 is closed, so that the ratio of the entire hollow lip portion 24 being crushed by the door seal surface 42a is small, and the air in the hollow lip 24 is reduced. There is little movement. For this reason, the inner weather strip 2 has a small seal reaction force R. Therefore, the closing property of closing the door 42 is improved, and the occurrence of a half door can be reduced.

  Further, even when the door seal surface 42a greatly enters the interior 46 of the arrow F and the inner wall 24f of the pressing surface 24e of the hollow lip portion 24 comes into pressure contact with the sticking prevention portion 24g, the sticking prevention portion 24g is uneven. Since the inner wall 24f and the sticking prevention portion 24g are in point contact with each other, the problem that the hollow lip portion 24 is prevented from being deformed can be solved.

  The hollow lip portion 24 has the root portion 24a disposed on the pedestal 21h and away from the outer wall 21g of the attachment portion 21, so that the hollow lip portion 24 is attached to the attachment portion 21 even when the door 42 is closed. Away from. For this reason, when the door 42 is closed, the hollow lip portion 24 can be pressed against the mounting portion 21 and the seal reaction force R can be prevented from rapidly increasing.

  The flange holding lips 21c and 21d are formed such that the flange holding lip 21c on the side close to the hollow lip portion 24 is smaller than the flange holding lip 21d. Thereby, since the position of the attachment part 21 can be retracted as much as possible in the direction of the vehicle interior 46, it is possible to prevent as much as possible that the hollow lip part 24 comes into pressure contact with the attachment part 21 and the seal reaction force R rapidly increases. .

  The weather strip according to the present invention is not limited to the above-described embodiment, and various modifications and changes can be made within the scope of the technical idea, and the present invention can be applied to these modifications and changes. Of course, it also extends.

  For example, the sticking prevention portion 24g is not limited to a convex shape, and may be any shape that allows the sticking portion 24g to make point contact with the inner wall 24f of the pressing surface 24e. Further, the sticking portion 24g may be formed on the inner wall 24f.

  Further, the hollow lip portion 24 has the lower root portion 24a installed at the central portion, but the upper lip portion 24b may be installed at the central portion.

It is a figure which shows the weather strip which concerns on embodiment of this invention, and is a side view of the vehicle which shows the installation state of a weather strip. It is an expanded sectional view of the arrow XX direction of FIG. It is an expanded sectional view showing the weather strip concerning an embodiment of the invention. It is a figure which shows the structure of the weather strip which has the conventional hollow part, and is a principal part expansion perspective view which has one part cross section.

Explanation of symbols

1 Weather Strip 2 Inner Weather Strip (Weather Strip)
3 Outer weather strip 4 Car body 21 Mounting portion 21c, 21d Flange holding lip 24 Hollow lip portion 24a, 24b Root portion 24c, 24d Bending portion 24f Inner wall 24g Sticking prevention portion (sticking prevention means)
41 Opening / Closing Body 42 Door 42a Door Sealing Surface 44 Opening 45 Flange R Seal Reaction Force P Vertex

Claims (6)

A weather strip having an attachment portion attached to a flange portion provided at a peripheral edge of an opening of a vehicle body,
The attachment portion is provided with a hollow lip portion that is formed integrally and continuously with the attachment portion, and that is pressed against an opening / closing body that closes the opening portion,
The weather strip, wherein the hollow lip portion is formed such that one root portion is closer to the central portion than the other root portion.   The weather strip according to claim 1, wherein the one root portion is formed at an acute angle with respect to the attachment portion.   The weather strip according to claim 1 or 2, wherein the hollow lip is provided with a bent portion.   The weather strip according to any one of claims 1 to 3, wherein a sticking prevention means is provided in the hollow lip portion on the one root portion side.   The weather according to any one of claims 1 to 4, wherein the hollow lip portion on the one root portion side is separated from the attachment portion when the opening / closing body is closed. strip. The mounting portion is formed with a flange holding lip,
In the flange holding lip, the flange holding lip on the side close to the hollow lip portion is formed smaller than other flange holding lips installed on the opposite side in the mounting portion. The weather strip according to claim 5.

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