JP2005271677A - Glass run - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glass run smoothly elevating door glass by preventing generation of abnormal sound of the glass run at the time of a forcible closing of a door in a door glass half-opened state or a bad road traveling and by suppressing improvement of sliding resistance at the time of elevating the door glass. <P>SOLUTION: This glass run is provided with: a glass run main body mounted on an inner peripheral side of a door frame and having a substantial U-shape in cross section constituted of a bottom wall, a cabin inside side wall and a cabin outside side wall; both seal lips; and a plurality of holding lips. A foamed body having either one form of a lip shape or a hollow shape is provided on either one member of the seal lips and the side wall opposed to the seal lips with a space with the other member. The glass run main body, both the seal lips and the holding lips are made of an olefinic thermoplastic elastomer material or the finely foamed material. The foamed body is made of the same olefinic thermoplastic elastomer material with a foaming multiplication rate 1.5 to 2.5 times. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a glass run mounted along a door frame of an automobile.

  As shown in FIG. 3, a glass run 4 (6) that guides the raising and lowering of the door glass 3 and seals the periphery of the door glass 3 is attached to the inner periphery of the door frame 2 of the automobile door 1.

  As shown in FIG. 4, the conventional glass run 6 includes a glass run body 60 having a substantially U-shaped cross section including a bottom wall 61c and a pair of vehicle inner side walls extending from the bottom wall 61c, and vehicle outer side walls 61a and 61b. A pair of vehicle interior and vehicle exterior seal lips 62a, 62b extending from the substantially leading ends of the side walls 61a, 61b toward the inside of the glass run body 60, respectively.

  The glass run 6 is fitted to a glass run attaching portion 20 formed on the inner peripheral side of the door frame 2, and seal lips 62 a and 62 b are sealed so as to sandwich the peripheral portion of the door glass 3 from both sides.

  The glass run 6 is generally made of rubber, particularly ethylene / propylene rubber (EPDM rubber). Recently, those made of olefinic thermoplastic elastomer (TPO) have been used. A sliding layer for reducing sliding resistance is provided on the contact surface of the bottom wall 61C and the inside and outside sealing lips 62a and 62b with the door glass 3.

  By the way, immediately after the door glass 3 is opened halfway and the door 1 is forcibly closed, or when the door glass 3 is opened halfway and the vehicle runs on a rough road, an abnormal noise such as crackling or crackling is generated from the glass run 6. There is. This abnormal noise is generated when the seal lips 62a and 62b repeatedly contact and disengage with the side walls 61a and 61b facing the door lip 3 as the door glass 3 vibrates. The seal lips 62a and 62b are rubbed with each other by causing a slight relative movement between the contact surfaces when they are pressed against the inner side surfaces of the opposing side walls 61a and 61b by the door glass 3, respectively.

  Therefore, conventionally, in order to solve the above problem, a coating of a highly slidable material such as polyethylene or polypropylene is formed on the inner surfaces of the side walls 61a and 61b and the surfaces facing the inner surfaces of the seal lips 62a and 62b. Then, by reducing the frictional resistance, it is possible to prevent the generation of the abnormal noise, or a massive foamed sponge 90 is formed between the seal lips 62a and 62b and the inner surfaces of the side walls 61a and 61b (for example, , Refer to Patent Document 1), and measures have been taken to prevent the occurrence of abnormal noise, but none of them has been able to sufficiently prevent the occurrence of abnormal noise.

  Even if a sliding layer of polyethylene or polypropylene, which is a highly slidable material, is formed on the inner surface of the main body that faces the seal lip, noise is still generated. The sliding layer constitutes the glass run main body itself. Since it is much harder than the EPDM rubber and TPO, it is caused by the hitting sound when the seal lip comes into contact with the sliding layer (for example, see Patent Document 2).

Further, when the massive foamed sponge 90 is provided, when the seal lip comes into contact with the massive foamed sponge as the door glass vibrates, the reaction force of the sealed lip to the door glass increases because of the massive form, and the door glass The sliding resistance at the time of raising and lowering of the door is increased, and the door glass is raised and lowered (opening and closing of the door glass opening) is not smooth.
JP 2001-130265 A JP 2001-225647 A

  The present invention has been made in view of the above circumstances, and its purpose is to prevent the generation of abnormal noise in the glass run that occurs when the door glass is half-opened and the door is forcibly closed or traveled on a rough road, Suppressing the improvement of the reaction force of the seal lip to the door glass and suppressing the improvement of the sliding resistance when raising and lowering the door glass can smoothly raise and lower the door glass (opening and closing the door glass opening). It is to provide a glass run that can.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A glass run mounted on the inner peripheral side of the door frame, the glass run body having a substantially U-shaped cross section comprising a bottom wall, a vehicle inner side wall and a vehicle outer side wall, both seal lips, and a plurality of holding lips In a glass run with
One of the members of the seal lip and the side wall facing the seal lip is provided with a lip-shaped or hollow-shaped foam with a space between the other member, and the glass The run body, both the seal lips, and the holding lip are made of an olefinic thermoplastic elastomer material or a finely foamed material thereof, and the foam is also made of an olefinic thermoplastic elastomer material, with an expansion ratio of 1.5 to It is composed of 2.5 times.

  According to the means 1, a glass run mounted on the inner peripheral side of the door frame, the glass run body having a substantially U-shaped cross section comprising a bottom wall, a vehicle inner side wall, and a vehicle outer side wall, and both the sealing lips And a glass run comprising a plurality of holding lips, a lip shape or a hollow shape with a space between one member of the seal lip and the side wall facing the seal lip and the other member And the glass run body, both the sealing lips, and the holding lip are made of an olefinic thermoplastic elastomer material or a finely foamed material thereof. This is a thermoplastic elastomer material with a foaming ratio of 1.5 to 2.5 times, so that it is easy to manufacture and lighter in weight. Alternatively it is possible to prevent abnormal noise of the glass run that occurs when the rough road running.

  That is, since all materials are mainly composed of olefin-based thermoplastic elastomer materials, they do not require a vulcanization process and are easy to manufacture compared to conventional EPDM rubber glass runs. Since the specific gravity is smaller than that of EPDM rubber, the weight can be reduced and the recyclability is excellent.

  In addition, since the foam is provided with a space from the other member not provided with the foam, and the foam is not a lump, the impact at the time of contact between the seal lip and the side wall is alleviated, and the foam is further expanded. In addition to elastic deformation of the body itself, deformation due to the lip shape or hollow shape can be added to prevent the generation of abnormal noise, and the door glass strongly strengthens the sealing lip due to the fluctuation of the vibration of the door glass. Even when it is pressed, the reaction force of the seal lip against the door glass is suppressed, the sliding resistance of the door glass is suppressed, and the door glass is raised and lowered (opening and closing the door glass opening) smoothly. It can be carried out.

  Mean 2. The glass run according to means 1, wherein the foam has a lip shape extending from the front end of the seal lip toward the opposite side wall, and is integrally formed by coextrusion with the seal lip.

  According to the means 2, the foam is formed in a lip shape extending from the front end of at least one of the vehicle inner side seal lip and the vehicle outer side seal lip toward the opposite side wall, and simultaneously with the seal lip. It is integrally formed by extrusion molding. Therefore, it is easy to produce a glass run containing a foam.

  Further, the foam is provided with a space apart from the side wall, and the foam is not a lump, so that when the seal lip is bent and the foam comes into contact with the side wall, the blow is mitigated. In addition to elastic deformation, deformation due to the shape of a lip shape can also be added to prevent the generation of abnormal noise, as well as increase the distance to the bottom of the seal lip, and due to variations in the vibration of the door glass Even when the door glass strongly pushes the seal lip, the reaction force of the seal lip against the door glass is suppressed, the sliding resistance of the door glass is suppressed, and the door glass moves up and down smoothly. It can be carried out.

  Means 3. The foam is provided on the side wall in a range where the tip of the at least one seal lip can come into contact, and is integrally formed with the side wall in one of a lip shape and a hollow shape by coextrusion molding. The glass run according to claim 1.

  According to the means 3, the foam is provided on the side wall in a range in which the tip of the at least one seal lip can contact, and is formed by coextrusion with the side wall in any one of a lip shape and a hollow shape. It is integrally formed. Therefore, it is easy to produce a glass run containing a foam.

  Also, since the foam is provided with a space apart from the seal lip, and the foam is not a lump, the impact is reduced when the seal lip is bent and contacts the foam on the side wall, and the foam itself In addition to elastic deformation of the lip, deformation due to the shape of a lip or a hollow shape can be added to prevent the generation of abnormal noise, and the bottom distance of the seal lip can be increased. Even when the door glass strongly pushes the seal lip due to vibration variations, the improvement of the reaction force of the seal lip to the door glass is suppressed, and the sliding resistance of the door glass is suppressed from increasing. Ascending and descending can be performed smoothly.

  Means 4. The foam has a portion that protrudes in a lip shape or a hollow shape within a range in which the tip of the vehicle interior seal lip can contact, and a portion that is embedded in the vehicle interior side wall, The glass run according to means 3, wherein a hard material for reinforcement is integrally provided in a plate shape on the outer surface portion of the vehicle interior side wall of the embedded portion.

  According to the means 4, the foam has a portion that protrudes in a lip shape or a hollow shape within a range in which the front end of the vehicle interior seal lip can contact, and a portion that is embedded in the vehicle interior side wall. Since a hard material for reinforcement is integrally provided in a plate shape on the outer surface portion of the vehicle inner side wall of the portion, even if a part of the side wall is formed of a foam in addition to the effect of the means 3, the plate shape Therefore, the function of the side wall can be satisfied without lowering the rigidity of the side wall.

Since the present invention is configured as described above, the following effects can be obtained.
(1) Since all materials are mainly composed of olefin-based thermoplastic elastomer materials, they do not require a vulcanization step and are easy to manufacture compared to conventional EPDM rubber glass runs. .
(2) Since the specific gravity is small compared to a conventional glass run made of EPDM rubber, the weight can be reduced and the recyclability is also excellent.
(3) Since the foam is provided apart from the other member not provided with the foam, and the foam is not a lump, the impact at the time of contact between the seal lip and the side wall is reduced, and the door glass Can be opened halfway to prevent the generation of abnormal noise in the glass run that occurs when the door is forcibly closed or when driving on a rough road.
(4) In addition, the foam is made of an olefin-based thermoplastic elastomer material similar to the glass run body and the like, and the foaming magnification is 1.5 to 2.5 times. By making the door glass half open, it is possible to prevent the occurrence of abnormal noise in the glass run that occurs when the door is closed tightly or when the vehicle runs on a rough road.
(5) Further, since the foam is provided with a space apart from the side wall or the seal lip, and the foam is not a lump, the impact is reduced when the seal lip is bent and the foam comes into contact with the side wall, In addition to elastic deformation of the foam itself, deformation due to the shape of a lip or hollow shape can be added to prevent the generation of abnormal noise, and the bottoming distance of the seal lip can be increased, Even when the door glass strongly pushes the seal lip due to the vibration of the door glass, the improvement of the reaction force of the seal lip to the door glass is suppressed, and the sliding resistance of the door glass is suppressed from increasing. The door glass can be raised and lowered smoothly.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a cross section of the glass run 4 of the first embodiment, and is a cross sectional view taken along the line II of FIG.

  As shown in FIG. 1, the glass run 4 of the present embodiment is an extruded body formed of an olefinic thermoplastic elastomer (TPO) or a fine foam thereof, and includes a bottom wall 41c and a pair of extending from the bottom wall 41c. A pair of glass run main body 40 having a substantially U-shaped cross section composed of a vehicle inner side wall and vehicle outer side walls 41a and 41b, and extending toward the inside of the glass run main body 40 from the substantially leading ends of both side walls 41a and 41b. Car interior and exterior seal lips 42a and 42b are provided.

  Further, in the vicinity of the bottom wall 41c portion of the vehicle inner side wall and the vehicle outer side walls 41a and 41b, vehicle inner side and vehicle outer side holding lips 43a and 43b projecting outward are formed, respectively.

  The glass run 4 is fitted into the glass run mounting portion 20 formed on the inner peripheral side of the door frame 2 by the vehicle inner and outer vehicle holding lips 43a and 43b as in the prior art, and both the seal lips 42a and 42b are fitted. The door glass 3 is sealed so as to sandwich the peripheral edge from both sides. A sliding layer for reducing sliding resistance is provided on the contact surface of the bottom wall 41c and the inside and outside sealing lips 42a and 42b with the door glass 3.

Lips of foams 51a and 51b are formed at the ends of the seal lips 42a and 42b with spaces between the opposing side walls 41a and 41b. The lip-shaped foams 51a and 51b are made of an olefin-based thermoplastic elastomer material similar to the glass run material and foamed at a foaming ratio of 1.5 to 2.5 times. The foams 51a and 51b are integrally formed with the two seal lips 42a and 42b by co-extrusion molding. The lip-shaped foams 51a and 51b include the vehicle inner seal lip 42a and the vehicle outer seal lip 42b. In the form of a lip extending from the front end of the lip toward the opposite side walls 41a and 41b, the seal lips 42a and 42b are integrally formed by co-extrusion. Therefore, it is easy to manufacture the glass run 4 including the foams 51a and 51b.

  Further, since the foams 51a and 51b are provided to be separated from the side walls 41a and 41b, and the foams 51a and 51b are not massive, the seal lips 42a and 42b are bent, and the foams 51a and 51b are the side walls 41a. In addition to the elastic deformation of the foams 51a and 51b themselves, deformation due to the shape of a lip shape is also added to prevent the generation of abnormal noise, The bottoming distance of the seal lips 42a and 42b can be increased. Further, even when the door glass 3 strongly pushes the seal lips 42a and 42b due to variations in the vibration of the door glass 3, the reaction force of the seal lips 42a and 42b against the door glass 3 is suppressed, and the door glass 3 It is possible to smoothly raise and lower the door glass 3 while suppressing an increase in the sliding resistance.

  The foams 51a and 51b are formed by foaming at a foaming ratio of 1.5 to 2.5 times. If the expansion ratio is less than 1.5, it is not much different from that of a solid material, and a buffering effect, flexibility of the foam itself, etc. cannot be expected. On the other hand, if the expansion ratio is larger than 2.5, the rigidity may not be secured, which is not preferable.

  FIG. 2 is a partial cross-sectional view of the glass run 4 showing the second embodiment and its modification.

  As shown in FIG. 2, the glass run 4 of the second embodiment and its modification is different from the first embodiment in that the foams 52 and 53 are respectively formed on the side walls. Other configurations are the same as those in the first embodiment.

  As shown in FIG. 2 (A), in the glass run 4 of the second embodiment, the lip-shaped foam 52 is made of an olefin-based thermoplastic elastomer material on the vehicle interior side wall 41a, and the foaming magnification is 1 .5 times to 2.5 times. The lip-shaped foam 52 has a portion 521 that protrudes in a lip shape within a range in which the front end of the vehicle interior seal lip 42a can contact, and a portion 522 that is embedded in the vehicle interior side wall 41a. Yes. A hard material 55 of olefin resin such as polyethylene resin or polypropylene resin for reinforcement is integrally provided on the outer surface portion of the vehicle interior side wall 41a of the embedded portion 522 in a plate shape.

  Moreover, what is shown in FIG.2 (B) shows the modification of 2nd Embodiment. In the glass run 4, a hollow foam 53 is formed on the vehicle inner side wall 41 a by an olefin-based thermoplastic elastomer material like the glass run main body and the like at a foaming ratio of 1.5 to 2.5 times. Similarly to the second embodiment, the hollow foam 53 is also embedded in the vehicle interior side wall 41a and a portion 531 that projects in a hollow shape within a range where the front end of the vehicle interior seal lip 42a can come into contact. Part 532. A hard material 55 of olefin resin such as polyethylene resin or polypropylene resin for reinforcement is integrally provided in a plate shape on the outer surface portion of the vehicle interior side wall 41a of the embedded portion 532.

  The lip-shaped or hollow foams 52 and 53 are embedded in the vehicle interior side wall 41a and protrude toward the vehicle interior seal lip 42a, respectively, and are integrally formed with the vehicle interior side wall 41a by co-extrusion molding. Is formed. Therefore, it is easy to manufacture the glass run 4 including the foams 52 and 53.

  Further, the foams 52 and 53 are provided so as to be separated from the vehicle interior seal lip 42a, and since the foams 52 and 53 are not in a lump shape, the vehicle interior seal lip 42a is bent and contacts the foams 52 and 53. In addition to the elastic deformation of the materials of the foams 52 and 53, deformation due to the shape of a lip or a hollow can be added to prevent the generation of abnormal noise. Further, the distance to the bottom of the vehicle inner seal lip 42a can be increased. Further, even when the door glass 3 strongly presses the vehicle inner side seal lip 42a due to variations in vibration of the door glass 3, the reaction force of the vehicle inner side seal lip 42a against the door glass 3 is suppressed, and the door glass 3 It is possible to smoothly raise and lower the door glass 3 while suppressing an increase in the sliding resistance.

  Moreover, since the said foams 52 and 53 have the part 522,532 embed | buried under the vehicle inner side wall 41a, respectively, the part which contacts the vehicle inner side wall 41a at the time of simultaneous extrusion molding increases, and the foam 52 , 53 and the vehicle interior side wall 41a.

  Further, in the glass run 4 of the second embodiment and the modified example thereof, the outer surface portion of the vehicle inner side wall 41a corresponding to the portions 522, 532 embedded in the vehicle inner side wall 41a of the foams 52, 53 is made of polyethylene. Since the hard material 55 of an olefin resin such as resin or polypropylene resin is integrally provided in a plate shape, even if the embedded portion is formed of a foam and the rigidity is partially reduced, the plate shape Therefore, the rigidity of the vehicle interior side wall 41a does not decrease.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the first embodiment, the lip-shaped foam is provided on both the inside lip and the outside seal lip. However, the foam is provided only on the inside seal lip. Also good. Moreover, it is good also considering the form of the foam of 1st Embodiment as a hollow shape.

  (B) In the second embodiment and the modification thereof, the foam is provided on the vehicle inner side wall. However, the foam may be provided on the vehicle outer side wall or both side walls.

  (C) In the said 2nd Embodiment and its modification, although olefin resin, such as a polyethylene resin and a polypropylene resin, was shown as a hard material, you may apply a hard olefin thermoplastic elastomer (TPO).

It shows the glass run in 1st Embodiment of this invention, and is the II sectional view taken on the line of FIG. FIG. 2 (A) shows a second embodiment of the present invention, and FIG. 2 (B) shows a partially enlarged glass run of the modified embodiment. It is sectional drawing. It is a side view which shows the structure of the motor vehicle door with which the glass run of this invention was mounted | worn. It is sectional drawing in the conventional glass run.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Automobile door, 2 ... Door frame, 3 ... Door glass, 4 ... Glass run, 40 ... Glass run main body, 41a ... Car inner side wall, 41b ... Car outer side wall, 41c ... Bottom wall, 42a ... Car inner side seal lip, 42b ... car outer side seal lip, 51, 52, 53 ... foam, 55 ... hard material.

Claims (4)

A glass run that is mounted on the inner peripheral side of the door frame, guides the raising and lowering of the door glass, and seals the periphery of the door glass, and extends from the bottom wall and both ends of the bottom wall. A glass run body having a substantially U-shaped cross section comprising a side wall and a vehicle outer side wall; an inboard seal lip and an outboard seal lip extending from the front ends of the side walls to the inside of the glass run body; and the glass run In a glass run with a plurality of holding lips protruding from the outside of the main body,
At least one seal lip and any one of the side walls opposed to the seal lip are provided with a foam in any one form of lip or hollow with a space between the other member,
The glass run body, the two seal lips, and the holding lip are made of an olefin-based thermoplastic elastomer material or a finely foamed material thereof,
A glass run characterized in that the foam is made of an olefinic thermoplastic elastomer material at a foaming ratio of 1.5 to 2.5 times.   2. The glass run according to claim 1, wherein the foam has a lip shape extending from a front end of a seal lip toward an opposite side wall, and is integrally formed by coextrusion with the seal lip.   The foam is provided on the side wall in a range where the tip of the at least one seal lip can come into contact, and is integrally formed with the side wall in one of a lip shape and a hollow shape by coextrusion molding. The glass run according to claim 1.   The foam has a portion that protrudes in a lip shape or a hollow shape within a range in which the tip of the vehicle interior seal lip can contact, and a portion that is embedded in the vehicle interior side wall, The glass run according to claim 3, wherein a hard material for reinforcement is integrally provided in a plate shape on the outer surface portion of the vehicle interior side wall of the embedded portion.

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