JP2018149958A - Automotive glass run - Google Patents

Abstract

A glass run in which deformation does not occur even when a cover lip changes over time is provided. A vehicle-exterior side wall (20) and a vehicle-interior side wall (30) of a glass run are provided with a vehicle-exterior seal lip (21) and a vehicle-interior seal lip. The vehicle-exterior seal lip and the vehicle-interior seal lip are composed of a surface-side layer 21a of the vehicle-exterior seal lip, a surface-side layer 31a of the vehicle-interior seal lip, and a rear-side layer 21b of the vehicle-exterior seal lip, which the door glass 5 abuts, respectively. It has a rear side layer 31b of the inner sealing lip. The back side layer of the vehicle-exterior seal lip and the back side layer of the vehicle-interior seal lip have a smaller plasticizer content than the surface-side layer of the vehicle-exterior seal lip and the surface side layer of the vehicle-interior seal lip. [Selection drawing] Fig. 1

Description

The present invention relates to a glass run that is attached to the inner periphery of a door frame of an automobile door and guides the raising and lowering of the door glass.

  As shown in FIG. 4, a glass run 110 for guiding the raising and lowering of the door glass 5 is attached to the inner periphery of the door frame 2 of the door 1 of the automobile. The entire conventional glass run 110 is shown in FIG. 3, and a sectional view of the conventional glass run 110 attached to the linear portion of the door frame 2 is shown in FIG. 5.

Conventionally, as shown in FIG. 4, the glass run 110 is mounted in a channel of the door frame 2 to guide the raising and lowering of the door glass 5 and to seal between the door glass 5 and the door frame 2. . Further, as shown in FIG. 3, the glass run 110 includes an upper side portion of the door frame 2 formed of the linear portion 111 formed by extrusion molding, a front side vertical side portion and a rear side vertical side portion which are also extruded. Are connected by a corner 112 formed by molding to match the shape of the corner 2b of the door frame 2.
The seal between the door 1 and the vehicle body is a door weather strip (not shown) attached to the outer periphery of the door panel and door frame 2 and / or an opening trim weather attached to the flange of the opening of the vehicle body. It is made by a strip (not shown).

  As shown in FIG. 5, the main body of the straight portion 111 of the glass run 110 has a substantially U-shaped cross section including a vehicle outer side wall 120, a vehicle inner side wall 130, and a bottom wall 140. A vehicle outer side seal lip 121 is provided so as to extend from the vicinity of the front end of the vehicle outer side wall 120 toward the inside of the main body having a substantially U-shaped cross section. Further, a vehicle inner side seal lip 131 is also provided on the vehicle inner side wall 130 so as to extend from the vicinity of the front end thereof toward the inside having a substantially U-shaped cross section.

  The vehicle outer side wall 120, the vehicle inner side wall 130 and the bottom wall 140 of the main body of the glass run 110 are inserted into the channel 103 provided in the door frame 2, and at least a part of the outer surface of each wall is pressed against the inner surface of the channel 103. The glass run 110 is held. As shown in FIG. 5, the channel 103 may be formed by bending the door frame 2 or may be formed by fitting a channel formed of another member into the door frame 2 site.

The door glass 5 slides on the inside of the main body of the glass run 110 with a substantially U-shaped cross section, and both side surfaces of the end portion of the door glass 5 are sealed by the vehicle exterior seal lip 121 and the vehicle interior seal lip 131. (For example, refer to Patent Document 1).
In addition, when the glass run 110 is mounted in the channel 103, in order to lock and hold the glass run 110 in the channel 103, the vehicle interior side wall 130 and the vehicle exterior side wall 120 are provided in the linear portion of the glass run 110. The vehicle interior holding lip 134 and the vehicle exterior holding lip 124 are provided respectively.

Further, an exterior cover lip 122 and an interior cover lip 132 are extended outwardly from the ends of the exterior side wall 120 and the interior side wall 130 in parallel with the exterior side wall 120 and the interior side wall 130. The glass run 110 is held by sandwiching the flange portion of the channel 103 by the vehicle outer side wall 120 and the vehicle outer side cover lip 122 and the vehicle inner side wall 130 and the vehicle inner side cover lip 132.

As described above, both the side surfaces of the end portion of the door glass 5 are sealed and held by the vehicle exterior seal lip 121 and the vehicle interior seal lip 131, but the vehicle exterior seal lip 121 and vehicle interior seal lip 131 are Since the contact with the both side surfaces of the door glass 5 continues, compression permanent distortion occurs in the vehicle outer side seal lip 121 and the vehicle inner side seal lip 131 due to a change with time.

For this reason, when the vehicle outside seal lip 121 and the vehicle interior seal lip 131 hold the door glass 5 and the vehicle is driven with the door glass 5 slightly lowered, the door glass 5 seals the vehicle outside seal due to vibration during traveling. The lip 121 and the vehicle interior seal lip 131 are repeatedly detached from each other, and a flapping sound is generated.

For this reason, in the glass run composed of the vehicle outer side wall, the vehicle inner side wall, and the bottom wall, a sponge member is provided on the vehicle outer side wall and the root portion of the vehicle outer seal lip, or on the vehicle inner side wall and the root portion of the vehicle inner seal lip. In addition, there is one that suppresses the fluttering of the door glass (for example, see Patent Document 2).

However, in this case, since a sponge member that is softer than the vehicle outer side wall and the vehicle outer side seal lip, or the vehicle inner side wall and the vehicle inner side seal lip, is used, the compression set due to change with time increases. Therefore, there is a demand for a glass run that does not reduce the pressing force of the vehicle outer side seal lip and the vehicle inner side seal lip with respect to the door glass even if it changes over time.

JP 2012-25376 A JP 2006-168381 A

  Therefore, an object of the present invention is to provide a glass run in which deformation does not occur even when the cover lip changes with time.

In order to solve the above-mentioned problem, the present invention of claim 1 is attached to the inner periphery of a door frame of an automobile door, and in an automotive glass run for guiding the raising and lowering of the door glass,
The main body of the glass run has a substantially U-shaped cross section consisting of a vehicle outer side wall, a vehicle inner side wall, and a bottom wall, and each of the vehicle outer side wall and the vehicle inner side wall has a substantially U-shaped cross section inside the main body. A vehicle outer side seal lip and a vehicle inner side seal lip extending toward the vehicle side, and the vehicle outer side seal lip and the vehicle inner side seal lip are used to seal the vehicle outer side surface and the vehicle inner side surface at the end of the door glass,
At least the vehicle inner side seal lip has a surface side layer of the vehicle inner side seal lip with which the door glass abuts, and a rear side layer of the vehicle inner side seal lip on the rear side of the surface side layer of the vehicle inner side seal lip. The back side layer is a glass run for automobiles characterized in that the plasticizer content is lower than the surface side layer of the inside seal lip.

In the first aspect of the present invention, the glass run main body has a substantially U-shaped cross section including an outer side wall, an inner side wall, and a bottom wall. An outside seal lip and an inside seal lip extending toward the inside of the substantially U-shaped body are provided, and the outside surface and inside surface of the door glass are sealed by the outside seal lip and the inside seal lip. ing. Therefore, the door glass can be held by the vehicle outer seal lip and the vehicle inner seal lip, and the space between the door glass and the door frame can be sealed.

At least the vehicle interior seal lip has a surface side layer of the vehicle interior seal lip with which the door glass abuts and a back surface side layer of the vehicle interior seal lip on the back side of the surface side layer of the vehicle interior seal lip. For this reason, the vehicle inner side seal lip can maintain the shape of the seal lip by the two layers of the seal lip surface side layer and the seal lip back side layer.

The back side layer of the vehicle interior seal lip is formed so that the plasticizer content is less than the surface side layer of the vehicle interior seal lip. For this reason, after the glass run is assembled, the plasticizer moves from the front side layer of the vehicle inner seal lip to the rear side layer of the vehicle inner seal lip, which contains a small amount of plasticizer even after a long period of time. The lip can be deformed in a direction in which the lip is pressed against the side surface of the door glass, and a reduction in the force with which the vehicle interior seal lip holds the door glass can be prevented.

According to the second aspect of the present invention, the vehicle exterior seal lip has a surface side layer of the vehicle exterior seal lip with which the door glass abuts, and a back surface layer of the vehicle exterior seal lip on the back surface side of the surface side layer of the vehicle exterior seal lip. And the rear side layer of the vehicle outer side seal lip is a glass run for automobiles having a smaller plasticizer content than the surface side layer of the vehicle outer side seal lip.

In the second aspect of the present invention, the vehicle outer side seal lip is formed on the surface side layer of the vehicle outer side seal lip with which the door glass abuts and on the back side of the surface side layer of the vehicle outer side seal lip. It has a back side layer. For this reason, the vehicle outer side seal lip can maintain the shape of the seal lip by the two layers of the seal lip surface side layer and the seal lip back side layer.

The back side layer of the vehicle outer side seal lip is formed so that the plasticizer content is smaller than that of the surface side layer of the vehicle outer side seal lip. For this reason, after the glass run is assembled, the plasticizer moves from the surface side layer of the vehicle outer seal lip to the back surface layer of the vehicle outer seal lip, which has a low plasticizer content even after a long time, and the vehicle outer seal. The lip can be deformed in a direction in which the lip is pressed against the side surface of the door glass, and a reduction in the force with which the vehicle exterior seal lip holds the door glass can be prevented.

According to the third aspect of the present invention, the rear side layer of the vehicle outer side seal lip or the rear side layer of the vehicle inner side seal lip is adjacent to the base portion of the vehicle outer side wall or the inner side wall of the vehicle inner side seal lip. It is the glass run for motor vehicles formed to the position.

According to the third aspect of the present invention, a material having a low compression set is used at the base portion of the vehicle outer side seal lip or the vehicle inner side seal lip with the vehicle outer side wall or the vehicle inner side wall, and the vehicle outer side seal lip or the vehicle inner side seal lip is used. The effect of compression set can be reduced. It should be noted that the plasticizer contents of the surface side layer of the vehicle outer seal lip and the surface side layer of the vehicle inner seal lip are both at the base part of the vehicle outer side wall and the vehicle inner side wall of the vehicle outer side seal lip and the vehicle inner side seal lip. It is made of the same material.

According to the fourth aspect of the present invention, the thicknesses of the surface side layer of the vehicle outer side seal lip and the rear side layer of the vehicle outer side seal lip are substantially the same, and the surface side layer of the vehicle inner side seal lip and the rear side of the vehicle inner side seal lip It is a glass run for automobiles having a similar layer thickness.

In the present invention of claim 4, the thickness of the front side layer of the vehicle outer side seal lip and the rear side layer of the vehicle outer side seal lip is substantially the same, and the front side layer of the vehicle inner side seal lip and the rear side of the vehicle inner side seal lip The layer thickness is almost the same. For this reason, even if the plasticizer moves from the surface side layer of the vehicle outer seal lip and the surface side layer of the vehicle inner seal lip to the back surface layer of the vehicle outer seal lip and the back surface layer of the vehicle inner seal lip, the respective layers The amount of increase / decrease in the plasticizer can be balanced without greatly changing the plasticizer content.

According to the present invention of claim 5, the back side layer of the outside seal lip or the back side layer of the inside seal lip contains a plasticizer more than the surface side layer of the outside seal lip or the surface side layer of the inside seal lip. It is a glass run for automobiles whose amount is 1 to 10% less.

In the present invention of claim 5, the back side layer of the vehicle exterior seal lip or the back side layer of the vehicle interior seal lip contains a plasticizer more than the surface side layer of the vehicle exterior seal lip or the surface side layer of the vehicle interior seal lip. The amount is 1-10% less. Therefore, the plasticizer can be transferred from the surface side layer of the vehicle outer seal lip or the surface side layer of the vehicle inner seal lip to the rear surface layer of the vehicle outer seal lip or the rear surface layer of the vehicle inner seal lip. It is possible to prevent the plasticizer from being transferred to the surface, balance the increase / decrease amount of the plasticizer after the transfer, and maintain the physical properties of the surface side layer and the back side layer. The back side layer of the vehicle outer seal lip and the back side layer of the vehicle inner seal lip both have a plasticizer content of 1 to 1 than the surface side layer of the vehicle outer seal lip and the surface side layer of the vehicle inner seal lip. It can be reduced by 10%.

According to a sixth aspect of the present invention, there is provided a glass run for an automobile in which a vehicle outer side cover lip and a vehicle inner side cover lip extending along outer surfaces of the vehicle outer side wall and the vehicle inner side wall are provided on the vehicle outer side wall and the vehicle inner side wall, respectively. It is.

According to the sixth aspect of the present invention, the vehicle outer side wall and the vehicle inner side wall are provided with a vehicle outer side cover lip and a vehicle inner side cover lip extending along the outer surfaces of the vehicle outer side wall and the vehicle inner side wall, respectively. For this reason, the exterior cover lip and the interior cover lip can hold and cover the flange portions at the distal ends of the door outer panel and the door inner panel to improve the appearance.

According to a seventh aspect of the present invention, the glass run is an automotive glass run formed of a thermoplastic elastomer solid material or fine foam material.

In the present invention of claim 7, since the glass run is formed of a thermoplastic elastomer solid material or a fine foam material, the glass run has a predetermined rigidity for holding the glass run on the door frame without requiring a vulcanization step. Since it is excellent in elasticity, the glass run can hold and seal the door glass as the door glass moves up and down.

The back side layer of the car inside seal lip is formed so that the plasticizer content is lower than the surface side layer of the car inside seal lip. The plasticizer is transferred from the lip surface side layer and can be deformed in a direction in which the seal lip is pressed against the side surface of the door glass, and a reduction in the force with which the seal lip holds the door glass can be prevented.

It is sectional drawing of the state which attached the glass run to the vertical side part of the door frame which is the 1st Embodiment of this invention, and is sectional drawing along AA in FIG. It is sectional drawing of the state which attached the glass run to the vertical side part of the door frame which is the 2nd Embodiment of this invention, and is sectional drawing along AA in FIG. It is a front view of the glass run which is embodiment of this invention. It is a front view of a motor vehicle door. It is sectional drawing of the state equipped with the conventional glass run.

An embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a front view of the front door 1 of the automobile, and FIG. 3 is a front view of the glass run 10 of the front door attached to the door frame 2 of the door 1. As shown in FIG. 4, the door frame 2 is provided in the upper part of the door 1, and the door glass 5 is attached so that raising / lowering is possible. That is, a glass run 10 is attached to the inner periphery of the door frame 2 to guide the raising and lowering of the door glass 5 and to seal between the door glass 5 and the door frame 2.

As shown in FIG. 3, the glass run 10 is attached to the linear portion 11 formed by extrusion molding as a whole and the corner portion 2 b of the door frame 2. The corner portion 12 is formed.
The linear portion 11 is a portion attached to the upper side portion of the door frame 2, a portion attached to the rear side vertical side portion of the door frame 2, and a portion attached to the division sash that forms the front side vertical side portion of the door frame 2. It consists of.

  The corner portions 12 are formed by forming the extruded portions at the respective corner portions on the front side and the rear side by molding and connecting the linear portions 11 so as to have a shape corresponding to the door frame 2. ing. The corner portion 12 of the glass run 10 is attached to the corner portion 2b of the door frame 2.

Below, the glass run 10 attached to the vertical side portion of the front door 1 will be described as an example.
FIG. 1 is a cross-sectional view taken along line AA of FIG. 3 of a glass run 10 attached to a vertical side of a press door type door frame 2 according to a first embodiment of the present invention. The second embodiment of the present invention will be described later.
First, the structure of the glass run 10 which is embodiment of this invention is demonstrated.

As shown in FIG. 1, the cross-sectional shape of the straight portion 11 of the glass run 10 attached to the vertical side portion of the door frame 2 is that the main body of the glass run 10 is the vehicle outer side wall 20, the vehicle inner side wall 30, and the bottom wall. 40 and a substantially U-shaped cross section.
The main body of the glass run 10 has basically the same substantially U-shaped cross-section in both the portion attached to the upper side portion of the door frame 2 and the portion attached to the vertical side portion.

The door frame 2 has a door reinforcing panel 2e inside, and the door reinforcing panel 2e is formed by bending a portion close to the bottom wall 40, and the tips are welded to the tips of the door outer panel 2c and the door inner panel 2d. And so on. The bottom wall 40 abuts against the bent portion and is held.

The vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 are extended from the inner ends of the vehicle outer side wall 20 and the vehicle inner side wall 30 toward the inside of the main body of the glass run 10 in a substantially U-shaped cross section. . Both side surfaces of the front end portion of the door glass 5 are held by the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31. Further, as the door glass 5 is raised and lowered, the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 are brought into contact with both side surfaces of the door glass 5 to guide the raising and lowering of the door glass 5, and the door frame 2 and the door glass. 5 can be sealed.

A vehicle interior auxiliary lip 33 is formed on the inner surface of the vehicle interior side wall 30 so as to contact the inner surface of the vehicle interior seal lip 31. The vehicle interior auxiliary lip 33 prevents the vehicle interior seal lip 31 from coming into close contact with the vehicle interior side wall 30 when the door glass 5 is greatly displaced in the vehicle interior in the main body. The side edge part of the glass 5 can be hold | maintained. Moreover, the door glass 5 can be located on the vehicle exterior side.

From the outside of the front end of each of the vehicle outer side wall 20 and the vehicle inner side wall 30, the vehicle outer side cover lip 22 and the vehicle inner side cover lip 32 respectively extend in the lateral lateral direction having a substantially U-shaped cross section. It is extended along.

Therefore, the ends of the door outer panel 2c and the door inner panel 2d of the door frame 2 are covered with both cover lips to improve the appearance, and the door outer panel 2c of the door frame 2 is covered with the vehicle outer side wall 20 and the vehicle outer cover lip 22. The glass run 10 can be held on the door frame 2 by sandwiching the front end of the door inner panel 2 d of the door frame 2 with the vehicle interior side wall 30 and the vehicle interior cover lip 32.

In the present embodiment, the vehicle interior side wall 30 and the vehicle interior seal lip 31 of the glass run 10 are larger and thicker than the vehicle exterior side wall 20 and the vehicle exterior seal lip 21, respectively. Therefore, the door glass 5 can be securely held, the door glass 5 can be positioned in the vehicle exterior direction, the step between the door glass 5 and the door frame 2 can be reduced, and the wind noise is reduced. Can improve the appearance. Moreover, the area of the vehicle exterior side of the door frame 2 or the door molding can be reduced, which is preferable in terms of design.

The vehicle outer side wall 20, the vehicle inner side wall 30 and the bottom wall 40, which are the main body of the glass run 10, the vehicle outer cover lip 22 and the vehicle inner cover lip 32 are formed of a solid material or a fine foam material of an olefin-based thermoplastic elastomer. It is preferable. In this case, the vulcanization process is unnecessary, and the glass run 10 has a predetermined rigidity for holding the glass run 10 on the door frame 2 and is excellent in elasticity. The door glass 5 can be held and sealed.
In addition, when forming the glass run 10 with a fine foam material, a solid material can be made into a fine foam material using a microcapsule foam composition. When a fine foam material is used, the glass run 10 can be reduced in weight.

When the vehicle outer cover lip 22 and the vehicle inner cover lip 32 are formed of a fine foam material,
On the surfaces of the vehicle outer cover lip 22 and the vehicle inner cover lip 32, a vehicle outer cover lip skin layer 22a and a vehicle inner cover lip skin layer 32a, which are thin films of solid material, can be provided. Smooth surface and good appearance.

The vehicle outer side wall 20 is connected to the vehicle outer side connecting portion 26, and the vehicle inner side wall 30 is connected to the vehicle inner side connecting portion 36 and the bottom wall 40. The vehicle outer side connection part 26 and the vehicle inner side connection part 36 are formed with grooves so that they can be easily bent at the continuous part between the vehicle inner side wall 30 and the vehicle outer side wall 20. Therefore, even when the vehicle outer side wall 20 and the vehicle inner side wall 30 are opened in a square shape with the bottom wall 40 at the time of manufacture, when the glass run 10 is installed into the channel 3, the vehicle outer side wall 20 and the vehicle inner side wall 30 and the bottom It becomes easy to bend between the walls 40, and attachment becomes easy.

The bottom wall low sliding member layer is provided on the inner surface of the main body of the glass run 10 of the bottom wall 40 in the same manner as the low sliding member layers provided on the vehicle outer seal lip 21 and the vehicle inner seal lip 31. 41 is preferably formed. In that case, sliding resistance with the door glass 5 is reduced.

In the present embodiment, the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 will be described based on a two-layer structure. However, at least the vehicle inner side seal lip 31 is formed in a two-layer structure, but the vehicle outer side seal lip 21 can also be used in the case where the vehicle outer side seal lip 21 does not have a two-layer structure.

The vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 are a surface side layer 21a of the vehicle outer side seal lip 21, a surface side layer 31a of the vehicle inner side seal lip 31, and a vehicle outer side. On the back side of the surface side layer 21 a of the seal lip 21 and the surface side layer 31 a of the vehicle interior seal lip 31, there are a back surface layer 21 b of the vehicle exterior seal lip 21 and a back surface layer 31 b of the vehicle interior seal lip 31.

On the surface of the front side layer 21a of the vehicle outer side seal lip 21 and the surface side layer 31a of the vehicle inner side seal lip 31, which slides on the door glass 5, a low sliding layer 21e of the vehicle outer side seal lip 21 and the vehicle are provided. A low sliding layer 31e of the inner seal lip 31 is formed. In this case, even if the door glass 5 enters the body of the glass run 10 and slides, the sliding resistance between the outside seal lip 21 and the inside seal lip 31 and the door glass 5 can be reduced. The smooth raising / lowering of the door glass 5 can be maintained.

The back side layer 21b of the vehicle exterior seal lip 21 and the back side layer 31b of the vehicle interior seal lip 31 contain a plasticizer more than the surface side layer 21a of the vehicle exterior seal lip 21 and the surface side layer 31a of the vehicle interior seal lip 31. It is made of a small amount of material. In the present embodiment, the front side layer and the back side layer differ only in the plasticizer content, and the other compositions are the same. However, if the plasticizer content is different, the other compositions are different. Things can be used.

When the glass run 10 is used for a long time, the outside seal lip 21 and the inside seal lip 31 are permanently deformed and deformed in a direction away from the side surface of the door glass 5. However, at this time, the rear side layer 21b of the vehicle outer side seal lip 21 and the rear side layer 31b of the vehicle inner side seal lip 31 are more than the surface side layer 21a of the vehicle outer side seal lip 21 and the surface side layer 31a of the vehicle inner side seal lip 31. Since the plasticizer content is small, after a long time, the rear side layer 21b of the vehicle outer side seal lip 21 and the rear side layer 31b of the vehicle inner side seal lip 31 are moved to the surface side layer 21a of the vehicle outer side seal lip 21 and the vehicle inner side. The plasticizer is transferred from the surface side layer 31 a of the seal lip 31. The migration of the plasticizer is accelerated when the temperature exceeds, for example, 50 ° C. Since both the permanent deformation of the seal lip and the plasticizer transition are accelerated at high temperatures, either one does not proceed unilaterally, but it is advantageous because both proceed simultaneously.

Then, the surface side layer 21a of the vehicle exterior seal lip 21 and the surface side layer 31a of the vehicle interior seal lip 31 contract, and the back surface layer 21b of the vehicle exterior seal lip 21 and the back surface layer 31b of the vehicle interior seal lip 31 expand. Therefore, the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 can be deformed in a direction to press the side surface of the door glass 5, and the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 hold the door glass 5. It is possible to prevent a decrease in power to perform.

In the present embodiment, the rear side layer 21 b of the vehicle outer side seal lip 21 and the rear side layer 31 b of the vehicle inner side seal lip 31 are the surface side layer 21 a of the vehicle outer side seal lip 21 and the surface side layer 31 a of the vehicle inner side seal lip 31. The plasticizer content is less than 1 to 10%. As the plasticizer, process oil or the like can be used.

In this case, plasticity is applied from the surface side layer 21a of the vehicle exterior seal lip 21 and the surface side layer 31a of the vehicle interior seal lip 31 to the back surface layer 21b of the vehicle exterior seal lip 21 and the back surface layer 31b of the vehicle interior seal lip 31. The agent can migrate, and the plasticizer can be prevented from migrating excessively to balance the increase / decrease amount of the plasticizer after the migration, and the physical properties of the surface side layer and the back side layer can be maintained. .

The back side layer 21b of the vehicle exterior seal lip 21 and the back side layer 31b of the vehicle interior seal lip 31 contain a plasticizer more than the surface side layer 21a of the vehicle exterior seal lip 21 and the surface side layer 31a of the vehicle interior seal lip 31. When the difference in amount is less than 1%, the amount of plasticizer to be transferred is small, and the reduction of the pressing force on the glass surface by the seal lip cannot be prevented. When the difference in the plasticizer content exceeds 10%, the amount of plasticizer to be transferred increases, the plasticizer balance is lost, and the physical properties of the seal lip cannot be maintained.

The surface side layer 21a of the vehicle exterior seal lip 21 and the back surface layer 21b of the vehicle exterior seal lip 21 have substantially the same thickness, and the surface side layer 31a of the vehicle interior seal lip 31 and the back surface layer of the vehicle interior seal lip 31 are the same. It is preferable that the thickness of 31b is substantially the same. In this case, plasticity is applied from the surface side layer 21a of the vehicle exterior seal lip 21 and the surface side layer 31a of the vehicle interior seal lip 31 to the back surface layer 21b of the vehicle exterior seal lip 21 and the back surface layer 31b of the vehicle interior seal lip 31. Even if the agent migrates, the amount of increase / decrease in the plasticizer can be balanced without greatly changing the content of the plasticizer in each layer.

Next, a second embodiment of the present invention will be described with reference to FIG.
In the second embodiment, the base portions of the vehicle outer side wall 20 and the vehicle inner side wall 30 of the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 are different, and other portions are the same as those of the first embodiment. Therefore, different parts will be described and description of similar parts will be omitted.

In the second embodiment, the base portion 21c of the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 which are the base portions of the vehicle outer side wall 20 and the vehicle inner side wall 30 of the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 are used. In the base portion 31 c, the rear side layer 21 b of the vehicle outer side seal lip 21 and the rear side layer 31 b of the vehicle inner side seal lip 31 extend to the root portion 21 c of the vehicle outer side seal lip 21 and the root portion 31 c of the vehicle inner side seal lip 31. It is not provided, but is formed of the same material as the plasticizer content of the surface side layer 21a of the vehicle outer side seal lip 21 and the surface side layer 31a of the vehicle inner side seal lip 31.

For this reason, at the root portion 21c of the vehicle outer side seal lip 21 and the root portion 31c of the vehicle inner side seal lip 31, a material having a small compression set is used and the compression set of the vehicle outer side seal lip 21 and the vehicle inner side seal lip 31 is compressed. The influence of can be reduced.

2 Door frame 10 Glass run 20 Car outer side wall 21 Car outer side seal lip 21a Surface side layer 21b Rear side layer 30 Car inner side wall 31 Car inner side seal lip 31a Surface side layer 31b Back side layer 40 Bottom wall

Claims (7)

In the glass run for automobiles that is attached to the inner periphery of the door frame of the automobile door and guides the raising and lowering of the door glass,
The main body of the glass run has a substantially U-shaped cross section composed of an outer side wall, an inner side wall, and a bottom wall, and the outer side wall and the inner side wall have a substantially U-shaped cross section of the main body, respectively. A vehicle outer seal lip and a vehicle inner seal lip extending toward the inner side of the main body are provided, and the vehicle outer surface and the vehicle inner surface of the end portion of the door glass are sealed by the vehicle outer seal lip and the vehicle inner seal lip;
At least the vehicle interior seal lip has a surface side layer of the vehicle interior seal lip with which the door glass abuts, and a back surface side layer of the vehicle interior seal lip on the back side of the surface side layer of the vehicle interior seal lip, An automotive glass run characterized in that the back side layer of the vehicle interior seal lip has a plasticizer content less than the surface side layer of the vehicle interior seal lip. The vehicle outer side seal lip has a surface side layer of the vehicle outer side seal lip with which the door glass abuts, and a rear side layer of the vehicle outer side seal lip on the rear side of the surface side layer of the vehicle outer side seal lip. The glass run for automobiles according to claim 1, wherein the back side layer of the outer seal lip has a plasticizer content less than that of the front side layer of the vehicle outer seal lip. The back side layer of the vehicle exterior seal lip or the back side layer of the vehicle interior seal lip is located up to a position close to the vehicle exterior side wall of the vehicle exterior seal lip or the vehicle interior seal lip or the root portion of the vehicle interior side wall. The glass run for automobiles according to claim 1 or 2 formed. The thickness of the surface side layer of the vehicle exterior seal lip and the thickness of the back surface layer of the vehicle exterior seal lip are substantially the same, and the wall thickness of the surface side layer of the vehicle interior seal lip and the back surface layer of the vehicle interior seal lip The glass run for automobiles according to any one of claims 1 to 3, wherein are substantially the same. The back side layer of the vehicle exterior seal lip or the back side layer of the vehicle interior seal lip has a plasticizer content of 1 to 1 than the surface side layer of the vehicle exterior seal lip or the surface side layer of the vehicle interior seal lip. The glass run for automobiles according to any one of claims 1 to 4, which is 10% less. 6. The vehicle outer side wall and the vehicle inner side wall are each provided with a vehicle outer side cover lip or a vehicle inner side cover lip extending along the outer surface of the vehicle outer side wall and the vehicle inner side wall, respectively. The glass run for automobiles according to one item. The said glass run is a glass run for motor vehicles as described in any one of the Claims 1 thru | or 6 formed with the solid material or fine foam material of the thermoplastic elastomer.

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