JP3334619B2 - Glass run - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass run which guides the movement of glass by slidingly contacting the outer peripheral edge of the moving glass and seals the space between the glass and the glass run.

[0002]

2. Description of the Related Art FIGS. 5 and 6 and FIGS. 7 and 8 show a door glass 2 attached to a door sash 21 of an automobile.
2 shows two types of conventional glass runs 51 and 61 for sealing the outer peripheral edge of the glass run 2. Any glass run 51,6
1 also includes channel portions 54 and 64 having a substantially U-shaped cross section composed of base portions 52 and 62 and two side wall portions 53 and 63, and two seals extending into the channel portions 54 and 64 from the tips of both side wall portions 53 and 63. Lip portions 55 and 65 are provided.

If the channel portions 54 and 64 are not moderately hard, the ease of insertion into the door sash 21 is reduced (the side wall portions 53 and 63 deflect during insertion, making it difficult to insert deep into the door sash 21). The fitting force due to the elastic contact of the both end portions of the base portions 52 and 62 with the inner surface of the door sash 21 is reduced. On the other hand, if the seal lip portions 55 and 65 are not appropriately soft, the sealing properties and sag resistance are reduced.
The choice of material is important. In addition, the outer peripheral edge of the door glass 22 is in sliding contact with the surfaces of the base portions 52, 62, and the outer peripheral surfaces of the door glass 22 are in sliding contact with the surfaces of the seal lip portions 55, 65. It is necessary to prevent this and improve the durability.

The glass run 51 shown in FIGS.
The channel portion 54 and the seal lip portion 55 have a spring hardness Hs of 70 ° to 90 ° (J
After being extruded to a predetermined thickness with EPDM rubber of ISA) and vulcanized and cured, flocking 57 is applied to the surface of the base portion 52 via an adhesive layer, and the surface of the seal lip portion 55 is spring-hardened. Sliding film 58 having a thickness of about 50 μm and made of a polyurethane resin having a thickness Hs of about 90 ° (JIS A).
Is formed by application.

The glass run 61 shown in FIGS. 7 and 8 is made of a thermoplastic elastomer (hereinafter referred to as TPE) as a base material, and the channel portion 64 and the seal lip portion 65 have a spring hardness Hs 70 ° to 90 ° ( JIS A) olefinic TPE (hereinafter referred to as TPO) with a thickness of about 1-2
At the same time, the base sliding member 67 is extruded on the surface of the base 62 with a polyethylene resin having a Shore hardness D of 30 ° to 45 ° to a thickness of about 50 μm to about 1 mm. The lip sliding member 68 is also formed by extrusion molding with a polyethylene resin having a Shore hardness D of 30 ° to 45 ° on the surface.

[0006]

The glass run 51 shown in FIGS. 5 and 6 is made of EPDM rubber having mechanical properties (especially elasticity, hysteresis, etc.) which are preferable for the glass run. Even if EPDM rubber having the same hardness is used for the seal lip portion 55, the channel portion 54 can be easily inserted into the door sash 21 and the fitting force can be improved, and the seal lip portion 55 can be easily sealed and set. Can be compatible. However, there is a problem that the number of manufacturing steps such as a rubber vulcanizing step and a flocking step is large, and the cost is increased.

The glass run 61 of FIGS. 7 and 8 has a smaller number of manufacturing steps than the glass run 51 of FIGS. However, the mechanical properties of TPO (especially elasticity, hysteresis, etc.)
Since TPO having the same hardness is used for the channel portion 64 and the seal lip portion 65 because it does not reach M rubber, the channel portion 64 is easily inserted into the door sash 21 and the fitting force is improved, and the seal lip portion 65 is sealed. If it is attempted to achieve both the resistance and the sag resistance, the elasticity of the seal lip portion 65 tends to be insufficient. Also, if the wear resistance is to be ensured by using polyethylene resin having the same hardness as the base sliding member 67 and the lip sliding member 68, the base sliding member 67 with which the door glass 22 is in strong sliding contact. Therefore, it is necessary to use a hard polyethylene resin, so that the lip sliding member 68 becomes harder than necessary. In this way, if the lip sliding member 68 that is harder than necessary is formed on the surface of the seal lip portion 65 where the elasticity tends to be insufficient, the seal lip portion 65 is abnormally deformed and the followability to the door glass 22 is reduced. Or the seal may break.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, reduce the number of manufacturing steps, reduce the cost, improve the ease of insertion of the channel portion into the sash, improve the fitting force, and seal the sealing lip portion. Another object of the present invention is to provide a glass run which can easily achieve both set resistance and sag resistance and can prevent the seal from being broken even if a lip sliding material is formed on the surface of the seal lip.

[0009]

According to a first aspect of the present invention, there is provided a channel portion including a base portion and a side wall portion, and two seal lip portions extending from the free end of the side wall portion to the inside of the channel portion.
In a glass run having a base sliding member coated on the surface of the base and a lip sliding member coated on the surface of the seal lip, the channel portion and the seal lip have a spring hardness Hs of 60 °. TP of up to 80 ° (JIS A)
E, the base sliding material has a Shore hardness of D45 ° -60 ° T
Made of PE or resin, the sliding material of the lip is Shore hardness D30 °
TPE or resin of up to 45 ° (the compounding ratio of the material is different from that of the thermoplastic elastomer or resin of the base sliding material)
, Characterized by being formed by extrusion molding.

In some cases, the base sliding member and the lip sliding member coincide with each other in the numerical value of the Shore hardness (D45 °). However, even in such a case, the mixing ratio of the materials is different from that in FIG. 8 is different from the conventional example shown in FIG.

In the first invention, the TPE spring hardness of the channel portion and the seal lip portion is Hs 70 ° to 8 °.
0 ° (JIS A) is more preferable. The TPE of the base sliding material or the Shore hardness of the resin is more preferably D50 ° to 60 °. The Shore hardness of TPE or resin of the lip sliding material is more preferably D30 ° to 40 °. That is,
The base sliding material is harder, the lip sliding material is softer,
It is preferable that each swings.

A second aspect of the present invention provides a channel portion including a base portion and a side wall portion, a seal lip portion extending from the side wall portion,
In a glass run including a base sliding member coated on the surface of the base portion and a lip sliding member coated on the surface of the seal lip portion, the channel portion has a spring hardness Hs7.
0 ° to 90 ° (JIS A) TPE with seal lip spring hardness Hs 50 ° to 70 ° (JIS A)
(The mixing ratio of the material is different from that of the thermoplastic elastomer in the channel portion), the base sliding material is TPE or resin having a Shore hardness of D45 ° to 60 °, and the lip sliding material is Shore hardness. D30 to 45 ° TPE or resin (the mixing ratio of the material is different from that of the thermoplastic elastomer or resin of the base sliding member), and is formed by extrusion molding.

In the same manner as described above, the channel portion and the seal lip portion coincide with each other by the value of the spring hardness (Hs
70 °) and a case where the base sliding material and the lip sliding material coincide in the numerical value of the Shore hardness (D45 °). Even in such a case, the mixing ratio of the materials is different.

In the second invention, the TP of the channel portion
The spring hardness of E is Hs75 ° -85 ° (JIS
A) is more preferred. The spring hardness of the TPE at the seal lip is more preferably Hs 50 ° to 65 ° (JIS A). The TPE of the base sliding material or the Shore hardness of the resin is more preferably D50 ° to 60 °. The Shore hardness of TPE or resin of the lip sliding material is more preferably D30 ° to 40 °. That is, it is preferable that the base portion slide material swings harder and the lip portion slide material swings softer.

In each of the first and second inventions, the TPE of the channel portion and the seal lip portion is not particularly limited, but is preferably an olefin (TPO). The TPE of the base sliding material and the lip sliding material is not particularly limited,
Olefin (TPO) or styrene is preferred. The resin of the base sliding material and the lip sliding material is not particularly limited, but polyethylene is preferable.

[0016]

1 and 2 show a glass run 1 according to a first embodiment of the present invention. As shown in FIG.
It is attached to a door sash 21 of an automobile to seal an outer peripheral edge of a door glass 22. The glass run 1 includes a channel portion 4 including a base portion 2 and two side wall portions 3, two seal lip portions 5 extending from free ends of both side wall portions 3 to the inside of the channel portion 4, and a surface of the base portion 2. And a lip sliding member 8 coated on the surface of the seal lip 5.

In this glass run 1, the channel portion 4 has a spring hardness Hs of 70 ° to 90 ° (JIS A).
O, the seal lip 5 has a spring hardness Hs of 50 ° or more.
70 ° (JIS A) TPO (TP of channel part 4)
O, and the base sliding member 7 is a TPO having a Shore hardness of D45 ° to 60 °, and the lip sliding member 8 is a TPO having a Shore hardness of D30 ° to 45 ° (base). The composition ratio of the material is different from that of TPO of the part sliding material 7), and is formed by simultaneous extrusion molding. Therefore, the number of manufacturing steps is small, and the cost can be reduced.

This glass run 1 has, as shown in FIG.
It is inserted and attached to the door sash 21 in the longitudinal direction. The channel portion 4 has a spring hardness Hs of 70 ° to 9 °.
Since it is formed to be moderately hard with a TPO of 0 ° (JIS A), it can be easily inserted into the door sash 21.

As shown in FIG. 1, the channel portion 4 is extruded with both side walls 3 opened in an inverted C shape.
As shown in FIG. 2, the side walls 3 are fitted to the door sash 21 in a state where the side walls 3 are moved substantially parallel to each other against the elasticity. Since the channel portion 4 is formed to be appropriately hard as described above, both end portions of the base portion 2 abut against the inner surface of the door sash 21 with appropriate elasticity, and a sufficient fitting force is obtained.

The two seal lip portions 5 sandwich both outer peripheral edges of the door glass 22 which moves up and down (in the direction perpendicular to the plane of FIG. 2). The seal lip 5 has a spring hardness Hs50.
Since it is formed to be moderately soft with TPO of ° to 70 ° (JIS A), it exhibits mechanical properties (especially elasticity, hysteresis, etc.) close to those of EPDM rubber, and provides excellent sealability and sag resistance. . Further, since the seal lip portion 5 is formed to be moderately soft, the seal lip portion 5 elastically contacts the opening side edge of the door sash 21 to tightly seal the space therebetween.

The outer peripheral edge of the door glass 22, which moves up and down, slides on the base sliding member 7, and often slides strongly. However, the base sliding member 7 has a Shore hardness D45.
Since it is hard formed by TPO of 60 ° to 60 °, wear is prevented and high durability is obtained.

The outer periphery of the door glass 22 which moves up and down slides on the lip sliding member 8. The lip sliding member 8 is formed of TPO having a Shore hardness D of 30 ° to 45 ° to the minimum necessary hardness, so that not only wear is prevented but also the mechanical properties of the seal lip 5 are reduced. Damage is minor. Therefore, abnormal deformation of the seal lip portion 5 and deterioration of followability to the door glass are not caused, and the seal is not broken.

FIG. 4 shows a glass run 11 according to a second embodiment of the present invention, in which the channel portion 4 and the seal lip portion 5 have a spring hardness Hs of 60 ° to 80 ° (JIS).
It differs from the first embodiment only in that it is integrally formed by extrusion molding with TPO of A).

In the glass run 11, as in the glass run 61 of FIGS. 7 and 8, the ease of insertion of the channel portion 4 into the door sash 21 and the improvement of the fitting force, the sealing property of the seal lip portion 5 and the set resistance are improved. Although it is somewhat difficult to achieve both compatibility with the glass run 61 in FIGS. 7 and 8, the base sliding member 7 has a Shore hardness D45 ° to 60 °.
And the lip sliding member 8 is formed to the minimum necessary hardness by a TPO having a Shore hardness D30 ° to 45 °, so that the seal lip 5 can be deformed abnormally or follow the door glass. It does not cause deterioration of the properties and does not break the seal.

It should be noted that the present invention is not limited to the above-described embodiment, and may be embodied by appropriately changing the scope of the invention as follows, for example, as follows.

(1) The base sliding member 7 and the lip sliding member 8 are formed (extruded) of styrene-based TPE or polyethylene resin. (2) The present invention is applied to a glass run for a slide glass on a side surface or a rear portion of a vehicle. (3) The present invention is applied to a glass run (weather strip) of a sliding portion for a sliding roof provided on a roof portion of a vehicle.

[0027]

As described in detail above, according to the glass run of the first invention, the number of manufacturing steps is small, the cost can be reduced, and the lip sliding material is formed on the surface of the seal lip. Even if the seal is not broken, an excellent effect is obtained.

Further, according to the glass run of the second invention, the number of manufacturing steps is small, the cost can be reduced, the ease of insertion of the channel portion into the sash and the fitting force can be improved, and the sealing lip portion can be improved. The sealing effect and the sag resistance can be easily achieved at the same time, and an excellent effect that the seal is not broken even when the lip sliding material is formed on the surface of the sealing lip is exhibited.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a glass run according to a first embodiment of the present invention.

FIG. 2 is a sectional view when the glass run of FIG. 1 is fitted to a door sash.

FIG. 3 is a partial side view of an automobile to which the glass run of FIG. 1 is applied.

FIG. 4 is a sectional view when a glass run according to a second embodiment of the present invention is fitted to a door sash.

FIG. 5 is a cross-sectional view showing a conventional glass run.

6 is a sectional view when the glass run of FIG. 5 is fitted to a door sash.

FIG. 7 is a sectional view showing another conventional glass run.

8 is a sectional view when the glass run of FIG. 7 is fitted to a door sash.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass run 2 Base part 3 Side wall part 4 Channel part 5 Seal lip part 7 Base part sliding material 8 Lip part sliding material 11 Glass run 21 Door sash 22 Door glass

Claims (2)

(57) [Claims] 1. A channel portion comprising a base portion and a side wall portion, two seal lip portions extending from a free end of the side wall portion to the inside of the channel portion, and a base portion sliding member coated on a surface of the base portion. And a glass run comprising a lip sliding member coated on the surface of the seal lip,
The channel portion and the seal lip portion are thermoplastic elastomers having a spring hardness Hs of 60 ° to 80 ° (JIS A), and the base sliding member has a Shore hardness of D45 ° or more.
60 ° thermoplastic elastomer or resin, wherein the lip sliding material is a thermoplastic elastomer or resin having a Shore hardness D of 30 ° to 45 ° (the mixing ratio of the material with the thermoplastic elastomer or resin of the base sliding material) Wherein the glass run is formed by extrusion molding. 2. A channel portion comprising a base portion and a side wall portion, a seal lip portion extending from the side wall portion, a base portion sliding material coated on a surface of the base portion, and a surface of the seal lip portion. In the glass run provided with the lip sliding member set as above, the channel portion has a spring hardness H.
s70 ° to 90 ° (JIS A) thermoplastic elastomer, wherein the seal lip has a spring hardness Hs50 °
Up to 70 ° (JIS A) (the mixing ratio of the material is different from that of the thermoplastic elastomer in the channel portion), and the base sliding material has a Shore hardness D45.
The lip sliding material is a thermoplastic elastomer or resin having a Shore hardness D of 30 to 45 ° (the thermoplastic elastomer or resin of the base sliding material is a Mixing ratio)
A glass run formed by extrusion molding.