JP2004299668A - Glass run channel for vehicle, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glass run channel capable of keeping low sliding resistance on a window glass surface for a long term, its manufacturing method, and a glass run channel assembly. <P>SOLUTION: A glass run 14 has rough surface sections 251 and 252 in parts contacting by pressure with window glass 3 on the surface of lip sections 26 and 27. Rough surface sections 253-255 are formed also on the groove inner surface of a base 21 and side-wall parts 22 and 23. The rough surface sections 251-255 are made of molding material containing (a) olefin-based thermoplastic elastomer containing 50 mass% or more of polyolefin resin (polypropylene or the like), (b) solid particles (spherical silicone resin particles or the like) having average particle size of 1-100 μm, and (c) liquid lubricant (silicone oil or the like). The rough surface sections are formed with the surface projected, and the projecting surfaces are provided with many small projecting parts made of the solid particles. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a glass run channel attached to a vehicle such as an automobile, and more particularly, to a glass run channel having a lip portion that presses against a window glass of a vehicle and a method of manufacturing the same. The invention also relates to a glass run channel assembly provided with such a glass run channel.

  As one of the elongate members mounted on a vehicle such as an automobile, there is a glass run channel that guides movement of a window glass and shields a space between the mounting portion and the window glass. Generally, such a glass run channel is mounted along a window frame of a vehicle and has a groove for guiding the window glass against an edge of the window glass moving in the window frame. Typically, a base portion corresponding to the bottom of the groove, a pair of side wall portions rising from both ends in the width direction of the base portion and corresponding to the side wall of the groove, and from the pair of side wall portions toward the inside of the groove. A lip portion is provided, which protrudes and elastically presses against the outer surface and the inner surface (surface) of the window glass. The glass run channel having such a structure is manufactured by extruding a so-called elastomer material such as an olefin-based thermoplastic elastomer (TPE) or a synthetic rubber mainly composed of an ethylene-propylene-diene copolymer (EPDM). ing.

  The window glass that moves into the groove of the glass run channel moves (slids (eg, moves up and down)) while being pressed against the surface of the lip. Therefore, it is known to provide a layer having a small coefficient of friction on the window glass sliding surface of the lip portion in order to reduce the sliding resistance when the window glass is moved. For example, co-extrusion molding of a sliding material such as a polyethylene resin, provision of a urethane resin coating film, and inclusion of a particulate lubricant in such a coating film have been proposed (for example, the following patents). References 1-3).

JP 2000-52780 A JP-A-10-166868 JP-A-7-150074

  By the way, in recent years, the service period of vehicles tends to be prolonged, and accordingly, it is desired that glass run channels and other vehicle components maintain their performance over a long period of time. For example, in the case of a glass run channel, the sliding resistance when moving the window glass is likely to fluctuate (typically increase) due to long-term use (that is, when the number of times of opening and closing the window glass increases). For this reason, there is a demand for preventing such an increase in sliding resistance for a longer period of time. However, the techniques disclosed in Patent Documents 1 to 3 still have room for improvement from the viewpoint of continuity of the effect of preventing an increase in sliding resistance. For example, when the number of times of sliding with the window glass is relatively small, the sliding resistance is low, but when the number of times of sliding exceeds thousands, the sliding resistance tends to increase.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a glass run channel in which the effect of suppressing an increase in sliding resistance with respect to window glass is enhanced, and a method for manufacturing the same. It is another object of the present invention to provide a glass run channel assembly including such a glass run channel.

The present invention provides the following glass run channels.
In other words, the invention of claim 1 is a long glass run channel for a vehicle having a groove attached along a window frame of a vehicle and guiding the window glass in contact with an edge of the window glass moving in the window frame. About. The glass run channel has a base portion forming the bottom of the groove, a side wall portion rising from both ends in the width direction of the base portion and forming a side wall of the groove, and extending from the side wall portion toward the inside of the groove. A lip portion elastically pressed against the surface of the window glass. Then, at least a portion of the lip portion that comes into pressure contact with the window glass surface, (b) an olefin-based thermoplastic elastomer in which the content of the polyolefin resin as a hard segment is 50% by mass or more of the entirety; It has a rough surface portion made of a molding material containing solid particles having an average particle size in the range of 1 to 100 μm; and (c) a lubricant which is liquid at ordinary temperature. The rough surface portion is formed in a state in which the surface is undulated, and a large number of small projections made of the solid particles are formed on the undulated surface.

  According to the glass run channel of the first aspect, a rough surface portion having the above composition and surface shape (an undulating surface on which a large number of small convex portions are formed) is provided in a portion of the lip portion that is pressed against the surface of the window glass. Therefore, the sliding resistance with the surface of the window glass is low, and the effect of preventing the sliding resistance from increasing is excellent in durability (durability). For example, even if the number of times the window glass is moved due to long-term use or the like increases, the sliding resistance of the window glass can be maintained at a predetermined target value or less.

According to a second aspect of the present invention, in the glass run channel of the first aspect, the rough surface portion is further provided on a groove inner surface of the base portion.
The inner surface of the groove at the base can press against the end face of the window glass to generate sliding resistance. The sliding resistance appears as a part of the sliding resistance when the window glass is moved when the glass run channel is disposed substantially parallel to the moving direction of the edge of the window glass, and the glass run channel is used as the window resistance. When it is arranged in a direction substantially perpendicular to the direction of movement of the edge of the glass, it appears as a part of the sliding resistance immediately before the movement of the window glass stops. Therefore, by providing the rough surface portion also in such a portion, the sliding resistance can be further reduced, and such a state in which the sliding resistance is low can be better maintained over a long period of time. Thus, according to the glass run channel of the second aspect, the effect of the glass run channel of the first aspect can be further enhanced.

  According to a third aspect of the present invention, in the glass run channel of the first or second aspect, the rough surface portion is further provided on at least one of a groove inner surface of the side wall portion and a back surface of the lip portion facing the surface. Things. According to the glass run channel of the third aspect, at least one of the following effects can be obtained in addition to the effects of the glass run channel of the first or second aspect.

That is, when the lip portion is elastically deformed by the moving window glass and approaches the side wall portion, the error of the shape of the window frame and the glass run channel (so-called mounting error) and the error of the locus of the moving window glass are accumulated. The lip is pressed against the side wall. At this time, the back surface of the lip contacts the inner surface of the side wall portion, but by providing a rough surface portion on at least one of these portions, the adhesive force between the inner surface of the side wall portion and the back surface of the lip portion can be reduced. it can.
When the window glass retreats and disappears from the groove, the lip portion pressed against the side wall portion attempts to return to the original shape. At this time, if the back surface of the lip portion is adhered to the inner side surface of the side wall portion in an adhesive manner, an abnormal sound (a peeling sound of “pitch”) may be generated when the lip portion separates from the side wall portion. By providing a rough surface portion in at least one of these portions, an effect of preventing occurrence of such an event can be obtained.

  According to a fourth aspect of the present invention, in the glass run channel according to any one of the first to third aspects, the hard segment constituting the olefin-based thermoplastic elastomer is a polypropylene resin, and the soft segment is an ethylene-propylene-diene copolymer (EPDM). ). According to the glass run channel of the fourth aspect, in addition to the effects of the glass run channel of the first to third aspects, an effect is obtained that the rough surface portion having the above surface shape can be easily formed.

  According to a fifth aspect of the present invention, in the glass run channel according to any one of the first to fourth aspects, the lubricant is silicone oil. According to the glass run channel of the fifth aspect, in addition to the effect of the glass run channel of any one of the first to fourth aspects, it is possible to easily form a rough surface having the above surface shape at the time of extrusion molding of the rough surface. Is obtained.

  According to a sixth aspect of the present invention, in the glass run channel according to any one of the first to fifth aspects, the solid particles are particles made of a material that does not melt when the rough surface portion is formed. According to the glass run channel of the sixth aspect, in addition to the effect of the glass run channel of any one of the first to fifth aspects, since the solid particles are not melted at the time of forming the rough surface portion, the shape of the particles (preferably, The rough surface portion can be formed while maintaining the spherical shape), thereby providing an effect that desired slidability can be imparted.

  According to a seventh aspect of the present invention, in the glass run channel according to any one of the first to sixth aspects, the solid particles are formed of silicone resin particles, glass beads, glass balloons, silica particles, polymethyl methacrylate (PMMA) resin particles, One or two or more spherical particles selected from the group consisting of ether ether ketone (PEEK) resin particles. According to the glass run channel of the seventh aspect, in addition to the effect of the glass run channel of any one of the first to sixth aspects, it is possible to obtain an effect that a rough surface having the above surface shape can be easily formed.

  The invention according to claim 8 is the glass run channel according to any one of claims 1 to 7, wherein the roughened surface portion has 1 to 20 parts by mass of the solid particles and the lubricant with respect to 100 parts by mass of the olefin-based thermoplastic elastomer. It contains 1 to 20 parts by mass. According to the glass run channel of the eighth aspect, in addition to the effect of the glass run channel of any one of the first to seventh aspects, it is possible to obtain an effect that a rough surface having the above surface shape can be easily formed.

According to a ninth aspect of the present invention, there is provided the glass run channel according to any one of the first to eighth aspects, wherein the molding run comprises a molding material containing an olefin-based thermoplastic elastomer having a lower hardness than the olefin-based thermoplastic elastomer of (a). And the rough surface portion is provided on at least a part of the surface of the resin body portion. Note that, here, “hardness” typically refers to a durometer hardness according to JIS K 7215. The term “resin” in the term “resin body” is a concept including a so-called elastomer material such as an olefin-based or other thermoplastic elastomer (TPE).
As described above, by providing the rough surface portion formed of the relatively hard elastomer on at least a part of the surface of the resin main body portion formed of the relatively soft (low hardness) elastomer, the resin Due to the elasticity of the main body, the rough surface can be pressed against the window glass surface with an appropriate elasticity. Therefore, according to the glass run channel of the ninth aspect, in addition to the effect of the glass run channel of any one of the first to eighth aspects, it is possible to further balance the sliding resistance and the elasticity while maintaining the balance. The effect of being easy is obtained. The effect of such a configuration is particularly well exhibited when the configuration of the present invention is applied to a lip.

  In a tenth aspect of the present invention, in the glass run channel of the ninth aspect, the resin main body integrally forms the base, the side wall, and the lip. According to this configuration, the base portion, the side wall portion, and the lip portion can be easily integrally formed by resin extrusion or the like. Therefore, according to the glass run channel of the tenth aspect, in addition to the effect of the glass run channel of the ninth aspect, an effect that the production of the glass run channel is further facilitated is obtained.

  According to an eleventh aspect of the present invention, in the glass run channel according to the ninth or tenth aspect, the resin main body portion and the rough surface portion have compatibility and are welded at a boundary therebetween. When the rough surface portion and the resin body portion have compatibility as described above, they can be satisfactorily joined by welding at the time of co-extrusion molding. Therefore, according to the glass run channel of the eleventh aspect, in addition to the effect of the glass run channel of the ninth or tenth aspect, there is obtained an effect that the rough surface portion is not peeled off and the durability is excellent.

  According to a twelfth aspect of the present invention, in the glass run channel according to any one of the ninth to eleventh aspects, the rough surface portion is formed in a layer shape, and has an average thickness of 10 to 100 μm. Typically, it is formed in a layer having a substantially uniform thickness. According to the glass run channel of the twelfth aspect, in addition to the effect of the glass run channel of any one of the ninth to eleventh aspects, it is possible to obtain an effect that a rough surface having the above surface shape can be easily formed.

  According to a thirteenth aspect of the present invention, in the glass run channel according to any one of the ninth to eleventh aspects, a plurality of streaky ridges extending in the longitudinal direction are formed on the rough surface at intervals in the width direction, and The surface of the raised portion is constituted by an undulating surface on which the small convex portion is formed. According to such a configuration, since the tip (top) of the raised portion mainly comes into contact with the window glass, the substantial contact area between the rough surface portion and the window glass can be reduced. Therefore, according to the glass run channel of the thirteenth aspect, in addition to the effect of the glass run channel of any one of the ninth to eleventh aspects, an effect of further reducing the sliding resistance can be obtained. In addition, since the rough surface portion between the raised portions is thinner than the raised portion and easily follows the deformation of the resin main body portion, the portion provided with such a rough surface portion is easily and appropriately elastically deformed. Is obtained.

  According to a fourteenth aspect of the present invention, in the glass run channel according to any one of the ninth to eleventh aspects, the rough surface portion is formed in a linear shape extending in a longitudinal direction, and a plurality of linear rough surface portions are spaced apart in the width direction. It is one that is open. According to the glass run channel of the fourteenth aspect, similar to the glass run channel of the thirteenth aspect, the substantial contact area between the rough surface portion and the window glass can be reduced. Thus, in addition to the effect of the glass run channel according to any one of claims 9 to 11, an effect of further reducing the sliding resistance can be obtained. Further, since the deformation is absorbed by the portion where such a rough surface portion is not provided, that is, the resin body portion that is more flexible than the rough surface portion, the glass run channel having the rough surface portion can be easily and appropriately elastically deformed. The effect is obtained.

The present invention also provides a glass run channel assembly based on any of the glass run channels disclosed herein.
That is, the invention of claim 15 is for at least two long vehicles having a groove which is attached along the window frame of the vehicle and guides the window glass in contact with an edge of the window glass moving in the window frame. A glass run channel assembly including a glass run channel and a joint for connecting between terminals in a longitudinal direction of the glass run channel. The glass run channel forming the assembly has a base portion forming the bottom of the groove, a side wall portion rising from both ends in the width direction of the base portion to form a side wall of the groove, and an inner side of the groove from the side wall portion. And a lip portion projecting toward the window glass and elastically pressing against the surface of the window glass. Here, at least one of the glass run channels constituting the assembly has at least a portion of the lip portion which is in pressure contact with the window glass surface, and (a) the content ratio of the polyolefin resin as the hard segment is the entirety. A rough surface portion made of a molding material containing: (b) solid particles having an average particle diameter in the range of 1 to 100 μm; and (c) a lubricant that is liquid at ordinary temperature. Have. The rough surface portion is formed in a state in which the surface is undulated, and a large number of small projections made of the solid particles are formed on the undulated surface.

According to the glass run channel assembly of claim 15, at least one of the glass run channels constituting the assembly has the above composition and surface at a portion of the lip portion of the glass run channel which is pressed against the window glass surface. A rough surface portion having a shape (an undulating surface on which a large number of small protrusions are formed) is provided. As a result, the sliding resistance with the window glass is reduced, and the effect of suppressing the increase in the sliding resistance is excellent in durability (durability).
A typical example of such a glass run channel assembly uses the glass run channel according to any one of the above-mentioned claims as a glass run channel having a rough surface portion. In this case, the effect of the glass run channel of any one of the above-described claims can be naturally exerted also in an assembly including the glass run channel of the present invention.

According to a sixteenth aspect of the present invention, in the glass run channel assembly according to the fifteenth aspect, the glass run channel in which a rough surface portion is provided at a portion that is in pressure contact with a window glass further includes: (1) a groove in the base portion. The rough surface portion is provided in at least one of an inner surface, (2) a groove inner surface of the side wall portion, and (3) a back surface of the lip portion facing the groove inner surface of the side wall portion. Things.
According to the glass run channel assembly of the sixteenth aspect, at least one of the following effects can be obtained in addition to the effects of the assembly of the fifteenth aspect. That is, by providing the rough surface portion also on the inner surface of the groove at the base of the glass run channel, the effect of the assembly of claim 15 can be further enhanced. In addition, by providing a roughened surface portion on at least one of the inner surface of the groove of the side wall portion of the glass run channel and the back surface of the lip portion facing the surface, the edge of the window glass may temporarily slide in contact with the inner surface of the side wall portion. At least one of an effect of not increasing the sliding resistance even if moved, an effect of improving shape resilience of the lip portion, and an effect of preventing generation of abnormal noise when the lip portion is separated from the side wall portion can be obtained. .

Further, the present invention provides the following glass run channel manufacturing method.
That is, the invention according to claim 17 is a long glass run channel for a vehicle having a groove which is attached along a window frame of a vehicle and guides the window glass in contact with an edge of the window glass moving in the window frame. And a method for producing the same. The glass run channel has a base portion forming the bottom of the groove, a side wall portion rising from both ends in the width direction of the base portion to form a side wall of the groove, and extending from the side wall portion toward the inside of the groove. A lip portion elastically pressed against the surface of the window glass. The lip portion has a rough surface portion provided at least in a portion that comes into pressure contact with the window glass surface. In the production method of the present invention, (a) an olefin-based thermoplastic elastomer in which the content of a polyolefin resin as a hard segment is 50% by mass or more of the whole; (b) a solid having an average particle diameter in a range of 1 to 100 µm; A molding material for forming a rough surface portion containing particles; and (c) a lubricant that is liquid at normal temperature is heated and melted and extruded from a resin extrusion mold, so that the surface is formed in an uneven state and the unevenness is formed. The rough surface portion having a large number of small projections formed by the solid particles on a surface is formed.

  According to the method for manufacturing a glass run channel for a vehicle of the present invention, a molding material having a predetermined composition for forming a rough surface portion is heated and melted and extruded to form a predetermined surface shape (a large number of small protrusions). A rough surface portion having an undulating surface on which a portion is formed can be formed. A typical example of a glass run channel preferably produced by such a method is the glass run channel of any of the above-mentioned claims.

According to an eighteenth aspect of the present invention, in the manufacturing method according to the seventeenth aspect, the rough surface portion is formed on at least a part of a surface of the elongated resin body portion, and the molding material for forming the rough surface portion and the resin body portion formation are formed. The resin body portion and the rough surface portion are formed by heating and melting a molding material for heating and simultaneously extruding the molten molding material from the resin extrusion mold.
According to the manufacturing method of the eighteenth aspect, in addition to the effect of the manufacturing method of the seventeenth aspect, a rough surface portion is formed on at least a part of the surface of the resin main body portion by a single extrusion step using one extrusion mold. The effect that the manufactured glass run channel can be easily manufactured is obtained. Such a manufacturing method can be suitably applied when the molding temperatures of the molding material for forming the rough surface portion and the molding material for forming the resin main body portion are the same or similar. In addition, the molding material for forming the rough surface portion and the molding material for forming the resin main body portion are melted, and the melted molding material is formed into a preformed long main body portion (for example, from a molding material having a composition different from the above). Resin body, metal body, etc.).

According to a nineteenth aspect of the present invention, in the manufacturing method of the seventeenth aspect, the molding material for forming the rough surface portion is heated and melted, and is extruded from the resin extrusion mold together with a preformed long main body portion. The rough surface is formed on at least a part of the surface of the elongated main body.
According to the manufacturing method of the nineteenth aspect, in addition to the effect of the manufacturing method of the seventeenth aspect, an effect is obtained that a rough surface portion can be easily formed on at least a part of the surface of an arbitrary elongated main body. Can be Such a manufacturing method can be suitably applied when the molding temperature of the material for forming the elongated main body (for example, the resin main body as described above) and the molding temperature of the molding material for forming the rough surface are significantly different. it can.

  Hereinafter, preferred embodiments of the present invention will be described. In addition, matters other than matters specifically mentioned in the present specification (for example, structural and / or compositional characteristics of the glass run channel according to the present invention) and all matters necessary for carrying out the present invention are described below. It can be understood as a design matter of a person skilled in the art based on the prior art. The present invention can be carried out based on the matters disclosed in the present specification and the drawings and common technical knowledge in the relevant field.

The glass run channel of the present invention has a groove that is mounted along a window frame of a vehicle and guides the window glass in contact with an edge of the window glass moving in the window frame, and includes a base portion and a side wall. It is not limited to other structures and the presence or absence of additional elements as long as it has a portion and a lip portion and at least a predetermined rough surface portion is provided at a portion of the lip portion that is pressed against the surface of the window glass.
Further, the glass run channel is not particularly limited as long as it is mounted on a window frame (not limited to a door panel) of a vehicle such as an automobile. The outer shape of the glass run channel and the shape of the main body (including the cross-sectional shape of the groove) may be determined so as to match the mounting portion on the window frame side and the shape of the window glass (edge).

  Hereinafter, the rough surface portion provided in the glass run channel of the present invention will be described. The rough surface portion is a molding material (a molding material for forming a rough surface portion, hereinafter also referred to as a "rough surface portion molding material") containing a predetermined (a) olefin-based thermoplastic elastomer, (b) solid particles, and (c) a lubricant. ).

  The component (a) is an olefin-based thermoplastic elastomer having a polyolefin resin as a hard segment. Examples of the polyolefin resin (olefin component) include polyethylene, polypropylene, and poly-1-pentene. Of these, polyethylene and polypropylene are preferred, and polypropylene is particularly preferred. Examples of the soft segment (elastomer component) constituting the olefin-based thermoplastic elastomer include an ethylene-propylene copolymer (EPM) and an ethylene-propylene-diene copolymer (EPDM). Of these, EPDM is particularly preferred. The hard segment may contain two or more polymers, and the same applies to the soft segment. However, the hard segment is polypropylene, and the olefin-based thermoplastic elastomer whose soft segment is EPM or EPDM is particularly preferably used. .

  The ratio of the hard segment (olefin component) contained in the olefin-based thermoplastic elastomer (component (a)) is 50% by mass or more (typically 50 to 90% by mass) of the entire elastomer (component (a)). And more preferably 60% by mass or more (typically 60 to 85% by mass). For example, by mass ratio, 60 to 85 parts (more preferably 65 to 80 parts) of polypropylene, 10 to 30 parts (more preferably 15 to 25 parts) of EPDM, and an appropriate amount (for example, 5 to 30 parts, preferably Is an olefin-based thermoplastic elastomer obtained by blending a softener of 10 to 20 parts). As the softening agent, for example, a process oil (typically, a paraffin type or a naphthene type) can be used. If necessary, an appropriate amount of an appropriate crosslinking agent (such as an organic peroxide) can be added.

  The hardness of the olefin-based thermoplastic elastomer (component (a)) constituting the rough surface portion is preferably 40 degrees (HDD40) or more in durometer hardness D according to JIS K 7215 (typically 40 to 70 degrees). , More preferably 50 degrees or more (typically 50 to 65 degrees), and still more preferably 55 degrees or more (typically 55 to 60 degrees). If the hardness of the olefin-based thermoplastic elastomer constituting the rough surface portion is too low, the effect of reducing the sliding resistance and / or the effect of maintaining the low sliding resistance may be reduced. Further, the adhesiveness to a resin main body and the like described later may increase.

  The solid particles as the component (b) are particles that maintain a solid state even at a typical molding temperature of the molding material (rough surface portion molding material). Depending on the manufacturing conditions of the glass run channel, solid particles made of a material that does not substantially melt at the time of forming the rough surface portion (that is, at the forming temperature of the rough surface portion) can be appropriately selected. Solid particles having an average particle diameter in the range of 1 to 100 μm are preferred, and a more preferred range is 3 to 20 μm. It is also preferable to use a combination of solid particles having an average particle size in the range of 3 to 15 μm and solid particles having an average particle size in the range of 25 to 100 μm. The particle shape of the solid particles is preferably substantially spherical. Ceramic materials (oxides such as silica, alumina, zirconia, and titania; carbides such as silicon carbide and boron carbide; nitrides such as silicon nitride and boron nitride); metal materials (such as molybdenum particles); and organic materials (polyamide resin) , A fluorine-based resin, a polymethacrylate-based resin, a polyetheretherketone resin, etc.), or a solid particle composed of a composite material thereof. Other solid particles mainly composed of silicone resin, graphite, molybdenum disulfide, calcium carbonate, calcium silicate, clay, kaolin, diatomaceous earth, mica powder, barium sulfate, aluminum sulfate, calcium sulfate, basic magnesium carbonate, etc. It is possible. One of these may be used alone, or two or more thereof may be used in combination. As the component (b) in the present invention, it is preferable to use solid particles mainly composed of silica or silicone resin. So-called spherical silicone resin particles, glass beads, glass balloons (hollow glass particles), silica particles and the like can be preferably used. Other examples of preferably used solid particles include relatively hard resin particles such as polymethyl methacrylate resin particles and polyetheretherketone resin particles.

  The lubricant as the component (c) is a liquid at room temperature, and for example, a silicone oil (polydimethyl silicone or the like) can be used.

  In a preferred embodiment of the present invention, the ratio of the components (a) to (c) contained in the rough surface portion is, by mass ratio, 100 parts of the component (a) and 1 to 20 parts of the component (b) (preferably Is 2 to 15 parts). Further, the ratio of the components (a) to (c) contained in the rough surface portion is, by mass ratio, 1 to 20 parts (preferably 2 to 10 parts) of the component (c) with respect to 100 parts of the component (a). ). A composition containing 1 to 20 parts (preferably 2 to 15 parts) of the component (b) and 1 to 20 parts (preferably 2 to 10 parts) of the component (c) based on 100 parts of the component (a). Rough surfaces are more preferred. According to such a composition, it is possible to easily form a rough surface portion having a surface state described later (an undulating surface on which a large number of small projections are formed). As a result, it is possible to obtain a glass run channel having a low sliding resistance and an excellent effect of preventing the sliding resistance from increasing. Further, it is preferable to use a mixture of liquid lubricants such as silicone oils having different molecular weights. As a result, the lubricant having a low molecular weight exudes to the surface of the roughened surface earlier than the one having a high molecular weight, and the lubricant having a high molecular weight exudes later. Thus, an increase in sliding resistance can be prevented over a long period of time.

  The rough surface portion constituting the glass run channel of the present invention can contain a thermoplastic resin other than the hard segment contained in the component (a). Preferred examples of such a thermoplastic resin include ultra-high molecular weight polyethylene, high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, olefin-based resins such as ultra-low-density polyethylene, polybutene, ethylene-α- Olefin copolymer, propylene-α-olefin copolymer, ethylene-vinyl acetate copolymer, hard or soft polyvinyl chloride resin (PVC), ABS resin, polyvinyl alcohol, butadiene rubber, isoprene rubber, butyl rubber, fluoro rubber And the like. From the viewpoint of maintaining or improving the glass slidability, abrasion resistance, and impact resistance, a high-molecular-weight polyethylene or a high-density polyethylene is used in an appropriate amount (preferably in a mass ratio of 20 to 100 parts of the component (a). 60 parts). The addition of high molecular weight polyethylene is particularly preferred.

  Other materials that can be contained in the rough surface portion from the viewpoint of maintaining or improving the slidability with glass include acrylic silicone resins and fatty acid compounds. When the acrylic silicone resin is contained, it is preferable to contain the acrylic silicone resin in a proportion of 10 parts or less (typically 1 to 10 parts) with respect to 100 parts of the component (a) by mass. As the fatty acid compound, fatty acid amides such as erucamide, oleic acid amide and stearic acid amide, which are solid at ordinary temperature and liquid at molding temperature, are preferably used. When such a fatty acid compound is contained, it is preferable to contain the fatty acid compound in a proportion by mass of 5 parts or less (typically 0.5 to 5 parts) with respect to 100 parts of the component (a). The rough surface portion of the present invention contains, as other auxiliary components, one or more general additives such as antioxidants, light stabilizers, ultraviolet absorbers, plasticizers, lubricants, coloring agents, and flame retardants. can do.

Next, the detailed surface shape of the rough surface portion made of the molding material having the above composition will be described.
The rough surface portion provided in the glass run channel of the present invention is formed so that its surface is undulated. It is preferable that the undulation of the surface of the rough surface is substantially uniform in the longitudinal direction of the rough surface. More preferably, it is substantially uniform in both the longitudinal direction and the width direction (the direction orthogonal to the longitudinal direction) of the rough surface portion. Here, the state that the undulation state is substantially uniform means that, for example, one or more of the average height of the undulations, the density of the undulations (density), the shape of the undulations, etc. It means that there is no remarkable difference from other parts.

FIG. 10 is a schematic cross-sectional view showing the surface state of the rough surface portion of the present invention. FIG. 10 shows a case where a rough surface portion 40 is formed on a predetermined portion of the surface of the resin main body portion 20 constituting the lip portion. As shown in the figure, the surface of the rough surface portion 40 is formed in an undulating state in which a relatively high portion 40H and a relatively low portion 40L are mixed.
A large number of small projections 45 are formed on the undulating surface that constitutes the undulating state. These small projections 45 are bulges formed on the undulating surface due to the presence of the solid particles 44 contained in the rough surface portion 40. The surface of the solid particles 44 contributing to the formation of the small protrusions 45 is formed from a matrix resin 42 (a continuous phase in which the solid particles 44 are dispersed) constituting the rough surface portion 40 like solid particles indicated by reference numeral 44a. It may be exposed, or may be covered with the matrix resin 42 like solid particles indicated by reference numeral 44b. As shown, solid particles 44a exposed from the matrix resin 42 and solid particles 44b not exposed may be mixed. It is more preferable that these small projections 45 are formed substantially uniformly in both the longitudinal direction and the width direction (the direction orthogonal to the longitudinal direction) of the rough surface portion 40. Here, that the small convex portion is formed substantially uniformly means that, for example, in one or more of the characteristics of the average height of the small convex portion, the density of the small convex portion, and the like, the rough surface portion (undulating surface) No significant difference is found between a part of the part and another part.

The height of the small convex portion 45 (referred to as the height of the swell from the surrounding undulating surface as indicated by the symbol h1 in FIG. 10) is usually the average value of the solid portion included in the rough surface portion 40. The height may be equivalent to 10 to 300% of the average particle diameter of the particles 44, and is preferably equivalent to 25 to 200% (more preferably 50 to 150%). The height of the undulations constituting the undulating surface (the difference between the relatively high portion 40H and the low portion 40L as indicated by the symbol h2 in FIG. 10) is usually small as an average value. It is preferably at least twice the average height of the protrusion 45, and more preferably at least five times the average height.
Such a surface shape of the rough surface portion can be typically realized by extruding a molding material (rough surface molding material) having the above-described specific composition, for example, by an ordinary method. That is, when the rough surface portion molding material is extruded, the above-described surface shape (the undulating surface on which the small convex portion is formed) can be obtained without the need for post-treatment for imparting the undulating shape to the surface accompanying the extrusion. ) Can be formed.

  Such a rough surface portion may be provided in a portion including substantially the entire range of a portion of the lip portion that is pressed against the window glass surface, or may be provided in a portion including a partial range thereof. Usually, it is preferably provided in a portion including almost the entire range of a portion pressed against the window glass surface. Further, a rough surface portion may be provided continuously along the longitudinal direction in such a portion, or a plurality of rough surface portions may be provided discontinuously at intervals. A rough surface portion may be provided on a predetermined portion of the front surface of the lip portion, and the rough surface portion may extend from the front surface to the rear surface of the lip portion. It is preferable that a rough surface portion is provided at a predetermined portion of the surface of the lip portion. Alternatively, the lip portion itself (the entire lip portion) may be constituted by a rough surface portion, and substantially the entire base portion or the side wall portion may be constituted by a rough surface portion. The position where the rough surface portion is provided and the shape and size of the rough surface portion may be constant before and after in the longitudinal direction of the glass run channel, or may differ depending on the location.

  In the glass run channel according to a preferred embodiment of the present invention, the lip has a long resin main body, and a rough surface is provided on at least a part of the surface of the resin main body. It is preferable that a rough surface portion is provided at least in a portion pressed against the window glass surface. It is preferable that the elongated resin main body is mainly composed of an elastomer. Examples of the elastomer (polymer compound exhibiting rubber elasticity at around room temperature) constituting the resin main body include synthetic rubber such as thermoplastic elastomer, thermosetting elastomer, EPM, EPDM, and styrene-butadiene rubber (SBR). Among them, thermoplastic elastomers such as olefin-based thermoplastic elastomer (TPO), styrene-based thermoplastic elastomer (SBC), urethane-based thermoplastic elastomer (TPU), and polyamide-based thermoplastic elastomer (TPAE) are preferable. In particular, an olefin-based thermoplastic elastomer is preferable in terms of cost, availability, and extrudability.

  As the olefin-based thermoplastic elastomer constituting the resin main body, those similar to the olefin-based thermoplastic elastomer serving as the component (a) constituting the roughened surface can be used. Here, the olefin-based thermoplastic elastomer as the component (a) and the olefin-based thermoplastic elastomer constituting the resin main body have at least one of the hard segment and the soft segment (preferably, both) in common. Is preferred. This makes it possible to satisfactorily join (typically, heat weld) the resin body portion and the rough surface portion. For example, it is preferable that the hard segments of these olefin-based thermoplastic elastomers are all polypropylene and the soft segments are all EPDM.

  The content ratio of the hard segment (olefin component) in the entire elastomer between the olefin-based thermoplastic elastomer of (a) and the olefin-based thermoplastic elastomer constituting the resin main body may be the same or different. . Usually, the content of the hard segment in the entire olefinic thermoplastic elastomer constituting the resin main body portion is smaller than the content of the hard segment in the entire olefinic thermoplastic elastomer (component (a)) constituting the rough surface portion. It is preferred that the ratio be lower. Further, as compared with the content of the softening agent in the entire olefinic thermoplastic elastomer (component (a)) constituting the rough surface portion, the softening agent (typically, It is preferable to further increase the content of process oil). For example, as a preferred example of the olefin-based thermoplastic elastomer constituting the resin main body, 5-45 parts (more preferably 10-35 parts, more preferably 20-30 parts) of polypropylene and 20-60 parts by mass ratio are used. Parts (more preferably 30 to 50 parts) of EPDM and an appropriate amount (for example, 20 to 50 parts, preferably 30 to 40 parts) of a softening agent. If necessary, an appropriate amount of an appropriate crosslinking agent (such as an organic peroxide) can be added.

  The hardness of the elastomer (preferably an olefin-based thermoplastic elastomer) constituting the resin main body is preferably 90 degrees (HDA90) or less in durometer hardness A according to JIS K 7215 (typically 50 to 90 degrees). ), More preferably 80 degrees or less (typically 60 to 80 degrees). According to the resin main body made of the elastomer having the hardness in such a range, the elasticity of the resin main body makes the rough surface part have an appropriate elasticity (for example, a degree that can maintain the sealing property and does not excessively increase the sliding resistance with the window glass). Can be pressed against the window glass surface. Since the sliding resistance and elasticity are easily balanced, the elastomer constituting the resin main body should have a durometer lower than that of the olefin thermoplastic elastomer (component (a)) constituting the above-mentioned rough surface. preferable.

In a preferred embodiment of the glass run channel of the present invention, the resin body as described above integrally forms the lip, the base, and the side wall. A rough surface is provided on at least a part of the surface of the resin main body. Such a glass run channel is suitable as an upper glass run channel attached from the side to the upper part of the window frame of the vehicle or a side glass run channel attached to the side of the window frame of the vehicle.
In another preferred embodiment of the glass run channel of the present invention, the base portion and the side wall portion are formed of a long metal body (for example, a metal plate formed by roll forming). An elongated resin body extends from the side wall of the metal body toward the inside of the groove to form a lip. A rough surface portion is provided on a predetermined portion of the surface of the resin body portion (lip portion). Such a glass run channel is suitable as a glass run channel (also referred to as a sash lower) installed in a door panel of a vehicle (below a window frame).

  The rough surface portion has a surface formed by an undulating surface on which a large number of small protrusions are formed, while the entire rough surface portion has a layer shape (for example, a layer shape having a substantially uniform thickness). be able to. Such a layered rough surface is shaped to provide a generally smooth surface. The average thickness of such a layered rough surface is preferably in the range of 10 to 100 μm, more preferably in the range of 25 to 75 μm. For example, a layered rough surface portion having an average thickness in the range of 10 to 100 μm according to the surface shape of the resin main body portion is provided over almost the entire area of the surface on the window glass side of the resin main body portion constituting the lip portion. Can be. The rough surface portion 40 schematically shown in FIG. 10 is an example of such a layered rough surface portion.

  In addition, the rough surface portion may have a shape (outer shape) in which a plurality of streaky ridges extending in the longitudinal direction are formed at intervals in the width direction. The surface of the raised portion is constituted by an undulating surface on which a number of small projections are formed. That is, the streaky ridge has a higher order structure than the above-mentioned small projection and the undulation including the small projection. The number of protrusions, the formation density, the cross-sectional shape, and the like are not particularly limited as long as they do not significantly impair the function as a glass run channel. Normally, the height from the portion adjacent to the protruding portion (or the skirt portion of the protruding portion) to the top of the protruding portion is preferably in the range of 100 to 2000 μm, and more preferably 500 to 1500 μm. The formation density of the raised portion can be 5 to 20 lines / cm, preferably 7 to 13 lines / cm, in the width direction of the rough surface portion. The cross-sectional shape (cross-sectional shape orthogonal to the longitudinal direction) of each raised portion can be a polygonal shape such as a triangular shape or a quadrangular shape. Further, the shape may be a circular shape, an elliptical shape or the like in which a part of the circumferential direction is cut out. It is preferable that the top of the raised portion is formed in a non-planar shape (convex shape) because the contact area with the window glass is reduced.

FIG. 11 schematically shows a state in which the rough surface portion 40 having the above-described streak-like raised portion is formed on a predetermined portion of the surface of the resin main body portion 20 constituting the lip portion. The horizontal direction in FIG. 11 corresponds to the width direction of the lip portion, and the direction perpendicular to the paper surface corresponds to the longitudinal direction of the lip portion. Note that the portions performing the same functions as those in FIG. 10 described above are denoted by the same reference numerals, and description thereof will be omitted. As shown in the figure, a plurality of streaky ridges 41 extending in the longitudinal direction are provided on the rough surface 40 at intervals in the width direction (only one of them is shown in FIG. 11). Have been. The cross-sectional shape of the line-shaped protrusion 41 is triangular. The surface of the streak-like raised portion 41 is formed in an undulating state in which a relatively high portion 40H and a relatively low portion 40L are mixed. A large number of small projections 45 formed by the solid particles 44 are scattered on the undulating surface.
FIG. 11 shows an example in which the rough surface portion 40 is provided on a predetermined portion of the surface of the resin main body portion 20. In this manner, the structure in which the streak-like protrusion 41 is formed on the rough surface portion 40 is the same as the entire lip portion. Can also be applied to the case where is constituted by the rough surface portion 40.

  The rough surface portion can be formed so that the rough surface portion as a whole (that is, the rough surface portion itself) has a linear shape (outer shape) extending in the longitudinal direction. For example, a configuration in which a plurality of such linear rough surface portions are arranged on at least a part of the surface of the main body portion at intervals in the width direction can be adopted. For example, a plurality of linear rough surfaces can be provided at intervals in the width direction on the surface of the resin body constituting the lip on the window glass side. The number of the linear rough surface portions, the arrangement density, the cross-sectional shape, and the like are not particularly limited as long as they do not significantly hinder the function as the glass run channel. Usually, the height from the surface of the resin main body (the surface adjacent to the linear rough surface) to the top of the linear rough surface is preferably in the range of 100 to 2000 μm, and more preferably 500 to 1500 μm. . The arrangement density of the linear rough surface portion can be 5 to 20 lines / cm, preferably 7 to 13 lines / cm with respect to the width direction of the main body portion. The cross-sectional shape (cross-sectional shape orthogonal to the longitudinal direction) of each linear rough surface portion can be a polygonal shape such as a triangular shape or a quadrangular shape, and may be a circular shape, an elliptical shape, or the like. It is preferable that the top of the linear rough surface is formed in a non-planar (convex) shape.

  In the configuration in which the linear rough surface portion is provided on at least a part of the surface of the resin main body portion, the hem portion (end portion on the resin main body portion side) of the linear rough surface portion may be joined to the resin main body portion. preferable. For example, it is preferable that chemical bonding such as welding (typically, thermal welding) and adhesion is performed. Further, the skirt portion of the linear rough surface portion may be embedded in the resin body. The width of the buried portion is preferably wider than the width of the portion exposed (projecting) from the resin body. According to such an aspect, the bonding force between the resin main body and the linear rough surface can be further increased by the anchor effect exerted by the portion embedded in the resin main body. Thereby, the durability of the rough surface portion is improved, and thus the durability of the glass run channel can be improved.

The glass run channel according to the present invention may have a configuration in which a rough surface portion is provided on a portion of the lip portion slidable with the window glass, and a rough surface portion is also provided on a groove inner surface of the base portion. Further, a rough surface portion may be provided on one or both of the inside surface of the groove of the side wall portion and the back surface of the lip portion facing the surface.
When a plurality of rough surfaces are provided at a plurality of positions (for example, a lip portion and a base portion) of the glass run channel, the rough surfaces may be formed of a molding material having substantially the same composition and differ from each other. It may be formed from a molding material having a composition. From the viewpoint of manufacturing easiness, it is preferable that the rough surface portion provided in one glass run channel is formed of a molding material having the same composition.

  The glass run channel of the present invention can be easily manufactured by adopting a molding method similar to a method conventionally used for manufacturing a glass run channel for an automobile or various moldings. Typically, general extrusion molding is performed using a resin molding material (rough surface portion molding material) for forming the above-mentioned rough surface portion and, if necessary, another molding material and / or a pre-molded body. , A glass run channel having a desired shape (cross-sectional shape) can be manufactured.

  A method for manufacturing a glass run channel in which a rough surface is provided on at least a part of the surface of a long resin body formed using a predetermined resin molding material will be described.

  For example, by performing so-called two-color extrusion molding (co-extrusion molding), it is possible to manufacture a glass run channel in which the resin main body and the rough surface are integrated in the longitudinal direction. That is, a first supply port for supplying a molding material (body molding material) for forming the resin main body, and a second supply port for supplying a molding material (rough surface molding material) for forming the rough surface portion. Each molding material is supplied in a heated and melted state to an extrusion die having a mouth and merged, and extruded together through an extrusion port having a predetermined shape. Thus, a glass run channel in which the resin body portion and the rough surface portion are heat-welded inside one extrusion die and integrated can be extruded. This method is suitably applied when the molding temperatures of both molding materials are substantially the same and have compatibility.

Alternatively, the glass run channel can be manufactured by the following method. That is, first, a molding material (body molding material) for forming a resin main body is supplied to an extrusion die, and a long molded body having a predetermined cross-sectional shape is extruded from the molding material. The resin main body is preformed by this extrusion molding.
The resin main body is wound around a drum or the like, and the resin main body is continuously supplied from the drum to an extrusion die, and a molding material (rough surface molding material) for forming a rough surface portion is heated and melted in the extrusion die. And extrudes them from an extrusion port having a predetermined cross-sectional shape. By this extrusion, a rough surface portion extending in the longitudinal direction is formed on a predetermined portion of the surface of the resin main body. The rough surface formed at this time has a surface formed by an undulating surface on which a number of small projections are formed. In addition, at the time of this extrusion molding, the surface of the resin main body is melted by heat, and the resin main body and the rough surface are integrated by heat welding.

  Then, after the molded body extruded from the extrusion port is cooled by a cooling device, the molded body is taken out via a take-off device and cut by a cutting device, whereby a glass run channel of a desired length is obtained. This manufacturing method is preferably employed when the molding temperature of the molding material constituting the resin body and the molding material of the rough surface portion are significantly different, or when the resin constituting the molding material has poor compatibility. In the case where the compatibility is not good or poor, an adhesive can be applied in advance to the surface of the resin body supplied to the extrusion die, which is fixed to the rough surface. Thereby, the adhesiveness between the resin main body and the rough surface can be improved.

  In the above-described manufacturing method, the previously extruded resin main body was wound around a drum and used. However, the first extrusion die for molding the resin main body and the second extrusion die for forming the rough surface were used. It is also possible to arrange the dies in series so that the resin body formed by the first extrusion die is continuously supplied to the second extrusion die as it is. In this case, storage of the resin main body becomes unnecessary.

  Further, the glass run channel assembly including the glass run channel according to the present invention can be manufactured by the same method as the conventional glass run channel assembly. Typically, a predetermined joint is formed by injection molding at the ends of a long glass run channel that has been manufactured in advance by extrusion or the like. That is, the longitudinal ends of the glass run channel are arranged with a predetermined gap (cavity) in a cavity of a predetermined joint molding die, and a predetermined molding material is injected into the cavity. As a result, a joint having a desired shape is formed in a state where the joint is joined to each end of the glass run channel. Since the injection molding method itself does not characterize the present invention at all, detailed description will be omitted.

The present invention will be described in more detail with reference to the following examples, but it is not intended to limit the present invention to those shown in the examples.
<First embodiment>
As a first embodiment, a glass run channel assembly 10 attached to a window frame 2 of a front door panel 1 of an automobile shown in FIG. 1 and glass run channels 12, 14, 16, and 18 constituting the assembly are shown in FIGS. This will be described with reference to FIG.
As shown in FIG. 1, a glass run channel assembly 10 according to the present embodiment includes four elongated glass run channels 12, 14, 16, and 18, and three joint portions 13, 15, and 17. I have. That is, the glass run channel 12 is disposed below the front portion 2a of the window frame 2 (inside the door panel 1), and is disposed along the inclined portion 2b of the window frame 2 and a substantially horizontally extending portion (ceiling portion) 2c. A glass run channel 14 disposed along the rear vertical portion 2d of the window frame 2, and a glass run channel 18 disposed below the rear vertical portion 2d (inside the door panel 1). Have. The glass run channels 12, 14, 16, 18 are connected by joints 13, 15, 17, and are integrated as a glass run channel assembly 10. As shown in FIG. 5, the glass run channel assembly 10 is configured such that a predetermined joint portion 15 is injection-molded between the end portions of two extruded glass run channels 14, 16, and at the same time, the two glass run channels 14, 16 are formed. 16 can be manufactured.

Next, the structure of each glass run channel will be described in detail. FIG. 2 is a cross-sectional view along the line II-II in FIG. 1, and is a cross-sectional view in a plane orthogonal to the longitudinal direction of the upper glass run channel 14 disposed on the inclined portion 2b and the ceiling portion 2c.
As shown in FIG. 2, the upper glass run channel 14 according to the present embodiment includes a resin main body portion 20 that forms a groove 24 extending along the longitudinal direction when attached to the window frame 2 (2c). And Here, the groove 24 has an opening into which the edge portion enters when the ascending and descending window glass 3 rises. The resin body 20 includes a base 21 corresponding to the bottom of the groove 24, and a pair of side walls 22, 23 rising from both ends in the width direction of the base 21 and serving as side walls of the groove 24 (that is, the side wall 22 closer to the vehicle interior). And a pair of lip portions 26 projecting from the free end portions of the side wall portions 22 and 23 toward the inside of the groove and elastically pressing against the surface of the window glass 3 sandwiched between the grooves 24. , 27. On the side of the base portion 21 facing the groove 24, a cushion portion 212 is provided by a hollow space 213 extending in the longitudinal direction. The cushion portion 212 is configured to be able to reduce the impact when the rising window glass 3 enters the groove 24 and collides with the base portion 21. Thereby, the generation of the collision sound can be suppressed. On the outer surfaces of the side wall portions 22 and 23, a retaining lip portion 28b hooked on the inner surface of the window frame to hold the glass run channel 14 in a glass run channel mounting groove (not shown) provided on the window frame side. , 28c and shielding lips 28a, 28d for covering the edges of the window frame (not shown).
The resin main body 20 is an olefin-based thermoplastic elastomer (hereinafter, referred to as “TPO (1)” obtained by blending 25 parts of a polypropylene resin, 40 parts of EPDM, and 30 parts of process oil (paraffin or naphthene) with a mass ratio of 30 parts. ) "), And a portion (elongated main body) formed by extrusion using a molding material (main body molding material) containing 5 parts of auxiliary components. The hardness of the TPO (1) constituting the resin body 20 is about 75 degrees in durometer hardness A according to JIS K 7215.

  As shown in FIG. 2, rough surfaces 251 and 252 are integrally formed in the longitudinal direction on the surfaces on the front side (the side that presses against the window glass 3) of the inside lip portion 26 and the outside lip portion 27, respectively. . The overall shape of the rough surface portions 251 and 252 is a layer shape (thin film shape), and the average thickness thereof is approximately 50 μm. When viewed microscopically, the surfaces of the rough surface portions 251 and 252 are in an undulating state in which a relatively high portion and a relatively low portion are mixed, similarly to the rough surface portion 40 schematically shown in FIG. It has become. Numerous small projections made of solid particles are formed on the undulating surface in the undulating state.

  The rough surface portions 251 and 252 are made of an olefin-based thermoplastic elastomer (hereinafter, referred to as “TPO (2)”) obtained by blending 70 parts of a polypropylene resin, 15 parts of EPDM, and 15 parts of a process oil (paraffin or naphthene). This is a part formed using a rough surface part molding material including the following. That is, the TPO (2) is an olefin-based thermoplastic elastomer containing 50% by mass or more (70% by mass) of polypropylene as a hard segment. The hardness of the TPO (2) is higher than the hardness of the resin body 20, and is about 58 degrees in durometer hardness D according to JIS K7215. Then, the above-mentioned rough surface portion molding material is, by mass ratio, 100 parts of TPO (2) and spherical silicone resin particles as solid particles (spherical silicone resin particles manufactured by GE Toshiba Silicone Co., Ltd., trade name “Tospearl (trademark)”). 5 parts), 8 parts of silicone oil as a liquid lubricant (dimethyl silicone oil manufactured by Dow Corning Toray Silicone Co., Ltd., trade name "SH200"), and an acrylic silicone resin (Shin-Etsu Chemical) It contains 5 parts of a silicone acrylic copolymer resin powder (trade name "X-22-8171" manufactured by Kogyo Co., Ltd.) and 2 parts of erucamide (manufactured by NOF Corporation).

  The upper glass run channel 14 is provided with a rough surface portion 253 on the inner surface of the groove (the surface facing the groove 24) of the base portion 21 (cushion portion 212) in addition to the front side of the lip portions 26 and 27. ing. Further, rough surface portions 254 and 255 are provided on the inner surfaces of the grooves of the side wall portions 22 and 23, respectively. These rough surface portions 253 to 255 are portions formed using the same rough surface portion forming material as the rough surface portions 251 and 252 provided on the lip portion. These rough surface portions 251, 252, 253, 254, 255 have an average thickness of the rough surface portions 251, 252 of the lip portion in the range of 1 to 100 μm (here, 50 μm), and an average thickness of the base surface rough surface portion 253. The range of 300 to 1000 μm and the average thickness of the rough surface portions 254 and 255 of the side walls are respectively different thicknesses of 100 to 300 μm, and the lip portions 26 and 27, the base portion 21, and the predetermined portions of the surface of the side wall portions 22 and 23 have different thicknesses. Each is formed integrally in the longitudinal direction. The rough surface portions 251 to 255 provided on the glass run channel 14 according to the present embodiment have compatibility with the corresponding portions (lip portion, base portion, and side wall portion) of the resin main body portion 20, respectively, and are co-extruded. Sometimes welded.

  Next, the structure of the side glass run channel 16 arranged along the rear vertical portion 2d will be described. FIG. 3 is a cross-sectional view along the line III-III in FIG. 1, and is a cross-sectional view in a plane orthogonal to the longitudinal direction of the side glass run channel 16 disposed in the rear vertical portion 2d. Note that the same reference numerals are given to portions that perform the same functions as the above-described upper glass run channel 14, and descriptions thereof will be omitted.

  As shown in FIG. 3, the main part of the side glass run channel 16 is a resin main body 20 that forms a groove 24 extending along the longitudinal direction when attached to the window frame 2 (2d). The groove 24 has an opening into which the rear edge of the window glass 3 that moves up and down enters. The window glass 3 moves up and down along the longitudinal direction of the side glass run channel 16 (the direction orthogonal to the plane of FIG. 3). The resin main body 20 is made of the same main body molding material as the upper glass run channel 14, and has a base 21, a pair of side walls 22, 23, and a pair of lips 26, 27 projecting from the side walls 22, 23. And The side glass run channel 16 is designed so that the edge of the window glass 3 and the base 21 of the glass run channel have a gap of about 1.3 to 3.5 mm. When the window glass moves up and down, the edge of the window glass may slide in contact with the base portion 21 due to the error of the window frame or the mounting error of the window frame. However, unlike the upper glass run channel 14, the edge of the window glass 3 does not contact the base 21 so as to collide with the base 21. Therefore, unlike the above-described upper glass run channel 14, a cushion portion (a portion indicated by reference numeral 212 in FIG. 2) is not formed on the base portion 21 of the resin main body portion 20 of the side glass run channel 16. That is, as shown in FIG. 3, the base portion 21 is formed roughly in a flat plate shape.

  Similarly to the upper glass run channel 14 (see FIG. 2), the side glass run channel 16 has the front sides of the lip portions 26 and 27, the groove inner surface of the base portion 21, and the groove inner surface of the side wall portions 22 and 23. Further, rough surface portions 251 to 255 made of the same rough surface portion molding material as the upper glass run channel 14 are provided. The rough surface portions 251 to 255 are formed in the same outer shape and surface shape as the rough surface portions 251 to 255 constituting the upper glass run channel 14, and are similarly welded to predetermined portions of the resin main body portion 20, respectively. I have.

The upper glass run channel 14 and the side glass run channel 16 described above are, for example, as shown in FIG. 13, a first supply port 81a for a material for molding a resin body and a second supply port 81a for a material for molding a rough surface. It can be easily manufactured by co-extrusion molding using a device in which the first extruder 80 and the second extruder 83 are connected to an extrusion die 82 having two supply ports 81b. That is, the main body molding material and the rough surface molding material are supplied in a heated and melted state from the first supply port 81a and the second supply port 81b, respectively, and merged in the extrusion die 82. The glass run channel material 84 is obtained by extrusion molding from the extrusion port having the cross-sectional shape shown. This manufacturing method can be suitably applied when the molding temperatures of the respective materials are the same or similar and both materials have compatibility with each other.
In addition, a description will be given of a manufacturing method which is an alternative to the above-mentioned manufacturing method. First, the main body molding material is supplied to a first extrusion die, and the resin main body is extruded using the first extrusion die. Next, the resin body portion is continuously supplied to a separate second extrusion die, and the rough surface portion molding material is supplied to the extrusion die in a heated and molten state. Extrude. As a result, the molding material forming the preformed resin main body and the rough surface molding material supplied in the heated and melted state are welded and joined in the longitudinal direction, and the resin main body 20 and the rough surface portions 251 to 255 are joined. The glass run channels 14 and 16 integrated can be obtained. This latter method can be suitably applied when both materials are compatible, but the molding temperatures of each material are different.
2 and 3, the cross-sectional shapes of the glass run channels 14 and 16 are illustrated when they are mounted on the window frame 2, but the illustration of the window frame 2 is omitted.

  Next, the structure of the glass run channels (sash lowers) 12 and 18 incorporated in the door panel 1 will be described. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1 and is a cross-sectional view in a plane orthogonal to the longitudinal direction of the sash lower 18 disposed below the rear vertical portion 2d. The glass run channel 12 disposed below the front end of the window frame has a similar structure. Note that the same reference numerals are given to portions that perform the same functions as the above-described upper glass run channel 14, and descriptions thereof will be omitted.

  As shown in FIG. 4, the glass run channel 18 includes a metal body 38 formed by roll-forming a metal plate (a metal plate strip material). The main body portion 38 forms the groove 24 extending in the longitudinal direction. The base portion 381 corresponds to the bottom of the groove 24, and rises from both ends in the width direction of the base portion 381 to become side walls of the groove 24. A pair of side walls 382 and 383 are provided. The window glass 3 moves up and down along the longitudinal direction of the glass run channel 18 (the direction perpendicular to the plane of FIG. 4). The free end portions of the side walls 382 and 383 are provided along the longitudinal direction thereof with a pair of lip portions projecting from the side walls 382 and 383 and elastically pressing against the surface of the window glass 3 sandwiched between the grooves 24. 36 and 37 are provided. The lip portions 36 and 37 have a long resin body portion 30 and rough surface portions 351 and 352 provided on predetermined portions of the surface of the window glass 3 on the side pressed against the surface. The resin main body 30 is made of the same main body forming material as the resin main body 20 constituting the upper glass run channel 14, and the rough surface portions 351 and 352 are made of the same rough surface forming material as the upper glass run channel 14 (see FIG. 2). Become. The rough surface portions 351 and 352 are formed in the same outer shape and surface shape as the rough surface portions 251 to 255 constituting the upper glass run channel 14, and are welded to the lip portions 36 and 37, respectively. A rough surface portion 353 is integrally formed on the inner surface of the groove of the base portion 381, similarly to the base portion 21 of the side glass run channel 16.

  The glass run channel 18 can be easily manufactured using an apparatus as illustrated in FIG. That is, first, a metal main body 71 is formed by roll forming in which a metal plate 70 is passed between a plurality of forming rolls, and the metal main body 71 is continuously supplied to an extrusion die 72, and two extruders 73a are used. , 73b are supplied to the extrusion die 72 in a heated and molten state, respectively, and are extruded together through an extrusion port to form a glass run channel material (intermediate molded body) 74. Thereby, an intermediate molded body 74 in which the metal main body 38 and the resin main body 30 shown in FIG. 4 are combined is obtained. Next, the intermediate molded body 74 is sent to a cooling device 75 for cooling. The cooled intermediate molded body 74 is taken out by a take-off machine 76 and cut into a predetermined length by a cutting machine 77. As a result, the molding material of the resin main body 30 provided in the intermediate molded body 74 and the rough surface molding material supplied in a heated and melted state are welded and joined in the longitudinal direction, and the resin main body 30 and the rough surface portions 351 and 352 are welded. And 353 are integrated with each other to obtain the glass run channel 18 according to this embodiment.

  According to the glass run channels 12, 14, 16, and 18 having the above-described structure, the roughened surface portions 251, 252, and 351, 352 having a predetermined composition and surface shape are provided on the window glass pressing surfaces of the lip portions 26, 27, 36, and 37. Therefore, the sliding resistance between the lip portion 26 and the like and the window glass 3 can be reduced, and the low sliding resistance can be maintained for a long period of time (even for many times of sliding). By using the rough surface portion molding material having the above composition, the rough surface portion 251 having the above surface shape can be easily realized (simultaneously with the extrusion molding). The rough surface portion 251 and the like are formed on predetermined portions of the surface of the resin body portions 20 and 30 made of a molding material having higher flexibility than the rough surface portion. Therefore, the lip portion 26 and the like can be pressed against the surface of the window glass 3 with an appropriate elasticity. The olefin-based thermoplastic elastomer (TPO (1)) forming the rough surface portion 251 and the like and the olefin-based thermoplastic elastomer (TPO (2)) forming the resin body portion 20 and the like are classified into hard segment types (polypropylene) and soft segments. The segment type (EPDM) is common, and the weldability is good due to the compatibility of both materials. Therefore, the resin body 20 and the like and the rough surface 251 and the like can be appropriately welded by utilizing heat and the like at the time of extrusion molding. As described above, since both are welded at the boundary, the glass run channel 12 and the like according to the above-described embodiment have good durability of the rough surface portion 251 and the like. For example, peeling of the rough surface portion 251 and the like from the resin body portion 20 and the like is effectively prevented.

  In the upper glass run channel 14, the side glass run channel 16, and the sash lower 18, the rough surface portions 253, 353 are provided on the surface of the base portions 21, 381 facing the groove 24 in addition to the lip portion. The effect of reducing the sliding resistance with the window glass 3 and the effect of maintaining the low sliding resistance are further enhanced. In addition to the sliding resistance between the window glass 3 and the lip portion 26 and the like, the sliding resistance between the window glass 3 (particularly, its end face) and the base 21 can be kept low for a long period of time. The resulting displacement of the glass run channels 14, 16 can be suppressed. That is, in the side glass run channel 16, rough surfaces are formed on both the lip portions 26 and 27 that come into contact with the surface of the window glass 3 and on the base portion 21 that sometimes comes into contact with the end surface of the window glass 3. A low sliding resistance when the window glass 3 moves up and down can be maintained for a long time, and the side glass run channel 16 can be prevented from being displaced upward or downward in the window frame. On the other hand, in the upper glass run channel 14, when the window glass 3 rises at the portion arranged on the inclined portion 2 b of the window frame 2, the window glass 3 first contacts the lips 26 and 27, and then contacts the base 21 and stops rising. Immediately before the stop, the end face of the window glass 3 comes into contact with the base 21 and a force acts to push it up obliquely. However, if the base 21 is provided with the rough surface portion 253, the window glass 3 The end face slips along the longitudinal direction of the base 21. This can prevent the glass run channel 14 from being displaced in the window frame 2 also in the upper glass run channel 14. Further, in these glass run channels 14, 16, rough surfaces 254, 255 are also provided on the surfaces of the side walls 22, 23 facing the groove 24. These rough surface portions 254 and 255 prevent the back surfaces of the lip portions 26 and 27 from sticking to the side wall portions 22 and 23. Therefore, when the lip portions 26 and 27 separate from the side wall portions 22 and 23, abnormal noise is generated. This is prevented from occurring. Also in the glass run channel assembly 10 configured using these glass run channels 12, 14, 16, and 18, the effect of each glass run channel is effectively exhibited.

  As described above, the hardness of the olefin-based thermoplastic elastomer (TPO (2)) constituting the rough surface portion and the like is higher than that of the olefin-based thermoplastic elastomer (TPO (1)) constituting the resin main body and the like. Therefore, the rough surface portion can be used as a core material for adjusting at least one characteristic such as shape retention, elasticity, and linear expansion coefficient of the base portion and / or the side wall portion of the glass run channel. For this purpose, the thickness of the rough surface portion in the base portion and / or the side wall portion is preferably in the range of 100 to 1000 μm (more preferably, 300 to 1000 μm in the base portion and 100 to 300 μm in the side wall portion). Appropriate. This is because these portions generally do not require as high elasticity (flexibility) as the lip portion. It is particularly preferable to provide a rough surface portion having a core material function on the base portion. Generally, the end surface of the window glass is polished but not as smooth as the surface, and is in a roughened state from a microscopic viewpoint. For this reason, the base portion where the end surface of the window glass is in contact with is more likely to be worn than other portions. Therefore, it is difficult to make the rough surface portion of this portion thicker than the other portions for a long period of time. It is effective in maintaining dynamic resistance.

  On the surface of the resin main body made of the main body molding material having the same composition as the resin main body 20 constituting the glass run channel 14, a surface layer (on the above-mentioned rough surface portion) is formed using the following molding materials (1) to (10). (Including applicable cases) to form corresponding molded articles 1 to 10, and the sliding resistance value between the molded articles and the window glass was evaluated.

[Molding Material (1)] A molding material having the same composition as the rough surface portion molding material used for forming the rough surface portions 251 to 255 provided in the glass run channel 14 was used. That is, in terms of mass ratio, 100 parts of the TPO (2) and 5 parts of the spherical silicone resin particles as solid particles (trade name “Tospearl (trademark)” manufactured by GE Toshiba Silicone Co., Ltd., average particle diameter of about 12 μm) A molding material containing 8 parts of the silicone oil as a liquid lubricant, 5 parts of the acrylic silicone resin, and 2 parts of erucamide was used.
[Molding material (2)] 5 parts of spherical silicone resin particles having different average particle diameters (trade name “Tospearl (trademark)” manufactured by GE Toshiba Silicone Co., Ltd., average particle diameter of about 6 μm) instead of the above-mentioned spherical silicone resin particles Was used. Other compositions are the same as those of the molding material (1).
[Molding material (3)] In place of the above-mentioned spherical silicone resin particles, 5 parts of spherical silicone resin particles having different average particle sizes (trade name “Tospearl (trademark)” manufactured by GE Toshiba Silicone Co., Ltd., average particle size of about 3 μm) Was used. Other compositions are the same as those of the molding material (1).

[Molding material (4)] By mass ratio, 100 parts of the above TPO (2) and spherical silica particles as solid particles (trade name “DENKA Fused Silica FB-35” manufactured by Denki Kagaku Kogyo Co., Ltd., 11 μm) A molding material containing 5 parts, 2.5 parts of the above silicone oil, 2 parts of erucamide, 40 parts of high molecular weight polyethylene, and 10 parts of high molecular weight polyethylene powder was used.
[Molding Material (5)] 5 parts of spherical silica particles having different average particle diameters (trade name “DENKA Fused Silica FB-35” manufactured by Denki Kagaku Kogyo Co., Ltd., average particle diameter of about 8 μm) instead of the above-mentioned spherical silica particles Was used. Other compositions are the same as those of the molding material (4).

[Molding material (6)] By mass ratio, 100 parts of the TPO (2), 5 parts of the spherical silicone resin particles (average particle diameter of about 12 μm) as solid particles, 5 parts of the acrylic silicone resin, and erucic acid A molding material containing 2 parts of amide was used. The molding material (6) does not substantially contain a component (for example, silicone oil) corresponding to the liquid lubricant.
[Molding material (7)] By mass ratio, 100 parts of the TPO (2), 2.5 parts of the silicone oil, 2 parts of erucamide, 40 parts of high molecular weight polyethylene, and 10 parts of high molecular weight polyethylene powder. Was used. The molding material (7) does not substantially contain components (spherical silicone resin particles, spherical silica particles, etc.) corresponding to the solid particles.

[Molding material (8)] By mass ratio, 100 parts of the above TPO (2), 4.5 parts of the above silicone oil, 3 parts of erucamide, 40 parts of high molecular weight polyethylene, and spherical silicone resin as solid particles 5 parts of particles (trade name “Tospearl (trademark)” manufactured by GE Toshiba Silicone Co., Ltd., average particle diameter of about 6 μm) and spherical polymethyl methacrylate resin particles (trade name “Gantz Pearl GM2801” manufactured by Ganz Kasei Co., Ltd., average particle (A diameter of about 28 μm).
[Molding material (9)] Among the solid particles, spherical PMMA resin particles having different average particle diameters (trade name “Gantz Pearl GM5003” manufactured by Ganz Kasei Co., Ltd.) are used instead of the spherical polymethyl methacrylate (PMMA) resin particles. 10 parts of an average particle diameter of about 50 μm). Other compositions are the same as those of the molding material (8).
[Molding material (10)] Among the solid particles, spherical PMMA resin particles having different average particle diameters (trade name “Gantz Pearl GM9005” manufactured by Ganz Chemical Co., Ltd., average particle diameter of about 85 μm) are used instead of the spherical PMMA resin particles. ) 10 parts were used. Other compositions are the same as those of the molding material (8).

  Moldings 1 to 10 were produced as follows. That is, first, the main body molding material (the molding material containing 100 parts by mass of the TPO (1) and 5 parts of the auxiliary component in mass ratio) and the molding materials (1) to (10) are heated and melted together. They were fed to an extrusion die for extrusion, and they were extruded together through an extrusion port. As a result, molded articles 1 to 10 in which a surface layer made of the above molding materials (1) to (10) was formed in a layer of about 50 μm thickness on one surface of a resin molded article having a thickness of about 1.5 mm were obtained. Was. When the external appearance of the surface layer provided on these molded products was visually observed, the surface layer of the molded product 6 was relatively glossy and formed in a state of low surface roughness. On the other hand, the surface layers of the molded bodies 1 to 5 and the molded bodies 8 to 10 are in a matte state, and when observed in more detail, as shown schematically in FIG. Undulating surfaces 40H, 40L, 40H, 40L,... Formed in the shape of a yuzu skin (orange peel) having 45 were formed in a state where the surface roughness was large. The formation of the undulating undulating surface in the molded bodies 1 to 5 and the molded bodies 8 to 10 is caused by the formation of a molten material (molding material) for forming a rough surface portion which flows in a compressed state in a die during extrusion molding. It is estimated that the flow velocity is partially fluctuated. That is, when the silicone oil layer does not exist in the portion in contact with the die flow path surface, a part of the material microscopically flows relatively directly in direct contact with the die flow surface surface, and when the silicone oil layer exists, liquid lubrication occurs. It is considered that a phenomenon in which the silicone oil as an agent acts as a sliding layer and flows relatively quickly occurs. Further, due to the interaction with the molding materials (1) to (5) and the molding materials (8) to (10) containing solid particles, the moldings 1 to 5 and the moldings 8 to 10 are shown in FIG. It is presumed that the undulating surface having a large number of small projections as shown was well formed.

  The sliding resistance between these molded products 1 to 10 and the glass surface was measured. That is, a tempered glass plate having a width of 100 mm, a height of 50 mm, and a thickness of 3.5 mm (having a surface finish equivalent to a side window glass for an automobile) was prepared. On the other hand, the test pieces were prepared by cutting the molded bodies 1 to 7 to a length of 300 mm. As shown in FIG. 6, a tempered glass plate 92 is held by a sliding resistance measuring instrument 98 configured to be reciprocally movable along a rail 96, and a range of 20 mm from the lower end of the surface of the tempered glass plate 92 is tested. The test piece 94 was repeatedly reciprocated in the longitudinal direction within a range of 150 mm while being pressed against the surface of the test piece 94 (the side on which the surface layer was formed) with a load of 9.8 N. The sliding speed of the glass plate 92 with respect to the test piece 94 was 200 mm / s. For each of the molded bodies 1 to 10, the sliding resistance when the number of reciprocating movements of the glass plate 92 reaches 1000 times (initial sliding resistance) and the sliding resistance when reaching 20000 times (late sliding resistance) are shown. It was measured. Table 1 shows the results. Table 1 also shows the rough composition and surface state of the surface layer provided in each molded product.

As can be seen from Table 1, in the molded products 1 to 5 in which the rough surface portion having the composition and the surface shape of the present invention is formed as the surface layer, the value of the initial sliding resistance is low (for example, 10 N / 100 mm or less). And a low sliding resistance value (for example, 10 N / 100 mm or less) could be maintained until late. Specifically, in each of the molded bodies 1 to 5, the increase rate of the initial (sliding frequency: 1000 times) sliding resistance value and the late (sliding frequency: 20000 times) sliding resistance value is 30%. % Or less. Here, the increase rate (%) of the sliding resistance value means a numerical value calculated by the following equation.
｛(Latter stage sliding resistance value-Initial sliding resistance value) / Initial sliding resistance value｝ × 100

  Also, in the molded products 8 to 10 in which the rough surface portion having the composition and the surface shape of the present invention is formed as the surface layer, the value of the initial sliding resistance is low (for example, 10 N / 100 mm or less, particularly 6 N / 100 mm or less). 2), and the low sliding resistance value (for example, 10 N / 100 mm or less, particularly 6 N / 100 mm or less) could be maintained until the later stage. Specifically, in each of the molded products 8 to 10, the rate of increase in the sliding resistance value was 5% or less.

  FIG. 14 is a graph showing the results of the above-described sliding test for the molded body 1 and the molded bodies 6 to 10. The horizontal axis of the graph indicates the number of slides (the number of reciprocations), and the vertical axis indicates the slide resistance value. As can be seen from this graph, in the molded article 1 having the rough surface portion of the present invention, the value of the sliding resistance is kept low (10 N / 100 mm or less) from the initial stage to the later stage. On the other hand, in the molded body 6 containing no liquid lubricant and having no roughened surface according to the present invention, the sliding resistance is clearly higher than the molded body 1 from the initial stage to the later stage. In addition, in the molded body 7 containing no solid particles and having no roughened surface according to the present invention, the initial sliding resistance value is almost the same as that of the molded body 1, but when the number of times of sliding increases, the molded body 1 , The sliding resistance is significantly increased. For example, when the number of times of sliding is about 10,000 or more, the sliding resistance becomes a value exceeding 10 N / 100 mm.

In addition, according to the molded articles 8 to 10 to which solid particles having a relatively large average particle diameter are added (two types of solid particles having different average particle diameters and materials are used in combination), better results are obtained than the molded article 1. Was. That is, the value of the sliding resistance in the initial stage could be further reduced. In addition, the increase in the sliding resistance value in the latter period could be suppressed better. In these molded products, the surface roughness is increased (increased) by further adding particles having a large particle size, the contact area with glass is reduced, and the increase in sliding resistance is more effectively suppressed. it is conceivable that.
FIG. 15 is an enlarged graph of an initial part (the number of times of sliding: up to 1000 times) in FIG. It can be seen that the sliding resistance value in this range is maintained lower in both the molded body 8 and the molded body 10. The sliding resistance value of the molded body 9 once peaks up to 1000 times of sliding (about 600 times), and the sliding resistance value at the peak is also suppressed to 10 N / 100 mm or less. Also, it can be seen that the sliding resistance value after the peak has been changing at a low value.

<Second embodiment>
The second embodiment is one example in which the overall shape (outer shape) of the rough surface portion provided on the lip portion is different from the first embodiment. Hereinafter, the points different from the configuration of the first embodiment will be mainly described.
FIG. 7 is an enlarged schematic view of the lip portion 26 of each of the upper and side glass run channels 14 and 16 according to the present embodiment, and is a schematic cross-sectional view showing a cross section orthogonal to the longitudinal direction. On the surface of the lip portion 26, a rough surface portion 257 made of the same rough surface forming material as that of the first embodiment is formed at a portion pressed against the surface of the window glass 3. The rough surface portion 257 is provided at a predetermined portion of the surface of the resin molded body 20 of the lip portion 26. On the rough surface portion 257, a plurality of strip-like raised portions 257a extending in the longitudinal direction are formed at intervals in the width direction. The cross section of each raised portion 257a is substantially triangular. The raised portions 257a adjacent to each other are connected by a base portion 257b. The width of each base portion 257b can be, for example, about 0.5 to 5 mm. Further, the thickness of the base portion 257b can be, for example, about 5 to 50 μm. The average height from the surface of the base portion 257b to the top 257c of the raised portion 257 can be, for example, about 100 to 2000 μm. The formation density of the raised portions 257a can be, for example, about 5 to 20 lines / cm with respect to the width direction of the rough surface portion 257. Then, as shown in the schematic diagram of FIG. 11, the surface of each raised portion 257a has an undulating surface (40H, 40L, 40H) in which a number of relatively high portions 40H and a number of relatively low portions 40L are mixed. , 40L,...), And a larger number of small convex portions 45 are formed on such undulating surface. Note that the rough surface portion 257 and the resin body portion 20 are thermally welded at the boundary.

  In FIG. 7, a state in which the lip portion 26 having the rough surface portion 257 having such an overall shape is deformed in the width direction by the window glass 3 is indicated by a two-dot chain line. As shown in the figure, since the rough surface portion 257 has a streak-like protruding portion 257a having a triangular cross section, the surface of the window glass 3 and the rough surface portion 257 (lip portion 26) are mainly formed at the top 257c of the protruding portion 257a. Typically, they come into linear contact (line contact). Therefore, according to the embodiment, the contact area between the rough surface portion 257 and the surface of the window glass 3 is smaller than when the rough surface portion has a layered overall shape. Thereby, the sliding resistance can be further reduced. Further, on the rough surface portion 257, raised portions 257a (thick portions) and base portions 257b (thin portions) extending in the longitudinal direction are provided alternately in the width direction. The rough surface portion 257 having such a configuration can be easily elastically deformed in the width direction mainly by deformation of a thin portion of the base portion 257b (for example, elastically deformed into a shape indicated by a two-dot chain line in FIG. 7). That is, when the window glass 3 moves and the lip portion 26 is elastically deformed into the shape shown by the two-dot chain line, the thin base portion 257b takes over the substantial deformation. Therefore, even in the lip portion 26 having the rough surface portion 257 formed using the olefin thermoplastic elastomer having a higher hardness than the olefin thermoplastic elastomer of the resin main body portion 20, the rough surface portion 257 is appropriately formed together with the resin main body portion 20. The lip portion 26 is fully elastically deformed (mainly, deformed in the width direction).

<Third embodiment>
This third embodiment is one example in which the overall shape (outer shape) of the rough surface provided on the lip is different from the first and second embodiments. Hereinafter, the points different from the first and second embodiments will be mainly described.
FIG. 8 is a schematic cross-sectional view showing an enlarged lip portion 26 of each of the upper and side glass run channels 14 and 16 according to the present embodiment. The lip portion 26 has a plurality of rough surface portions 258 formed of a rough surface portion forming material similar to that of the first embodiment at a portion which is pressed against the surface of the window glass 3. These rough surface portions 258 are formed in a linear external shape as a whole, and a plurality of rough surface portions 258 are provided at predetermined portions on the surface of the resin main body portion 20 constituting the lip portion 26 at intervals in the width direction. The resin main body portion 20 and each rough surface portion 258 are thermally welded at the boundary. The cross-sectional shape orthogonal to the longitudinal direction of each rough surface portion 258 is substantially triangular, and the skirt portion (root portion) 258a is embedded in the resin main body portion 20 so as to also act as an anchor. The distance between the adjacent rough surface portions 258 may be, for example, about 0.5 to 5 mm at the bottom surface of the rough surface portions 258. The average height from the surface of the resin body 20 to the top 258b of the rough surface 258 can be, for example, about 100 to 2000 μm. The formation density of the rough surface portion 258 can be, for example, approximately 5 to 20 lines / cm with respect to the width direction of the resin main body portion 20. In addition, the surface of each rough surface portion 258 is constituted by an undulating surface on which a number of small projections are formed.

  FIG. 9 shows a state in which the lip portion 26 having the rough surface portion 257 having such an overall shape is deformed in the width direction by the window glass 3. As shown in the figure, since the lip portion 26 is provided with a linear rough surface portion 258 having a triangular cross section in the longitudinal direction, the surface of the window glass 3 and the lip portion 26 are mainly formed by the top portion 258b of the rough surface portion 258. , Typically makes a linear contact (line contact). Therefore, according to the embodiment, the contact area between the rough surface portion 258 and the surface of the window glass 3 is smaller than when the rough surface portion has a layered overall shape. Thereby, the sliding resistance can be further reduced. In the resin body 20, a portion provided with a rough surface portion 258 extending in the longitudinal direction and a portion not provided with the rough surface portion 258 are provided alternately in the width direction. The lip portion 26 having such a configuration can be easily elastically deformed in the width direction mainly by deformation of the resin main body portion 20 at a portion where the rough surface portion 258 is not provided. Accordingly, even in the lip portion 26 having the rough surface portion 257 formed using the olefin-based thermoplastic elastomer having a higher hardness than the olefin-based thermoplastic elastomer of the resin main body portion 20, the lip portion 26 is appropriately elastically deformed. Functions can be fully exhibited.

  As described above, the glass run channel for a vehicle and the assembly including the glass run channel of the present invention have been described with reference to some embodiments. However, the present invention is not limited to the shapes and applications shown in these embodiments. For example, the present invention can be applied to other vehicle components having a press-contact portion (lip portion or the like) elastically pressed against a smooth surface (a window glass, a body panel, or the like) of the vehicle. Such vehicle components (typically long resin moldings) include so-called weatherstrips, for example, inner (vehicle interior) belt molding attached to the edge of the glass doorway in contact with movable glass. Examples thereof include belt moldings such as an outer (vehicle outside) belt molding, a front window molding having a pressure contact portion elastically pressed against a vehicle body panel, and a sunroof molding.

That is, the technology disclosed in the present specification includes the following.
(1) An elongated resin molded member attached to a predetermined mounting portion of a vehicle,
A pressure contact portion elastically pressed against a vehicle component adjacent to the mounting portion,
At least the following components (a) to (c) are provided at a portion of the press contact portion that can directly contact the vehicle component:
(a) an olefin-based thermoplastic elastomer in which the content of a polyolefin resin as a hard segment is 50% by mass or more of the whole;
(b) solid particles having an average particle size in the range of 1 to 100 μm; and
(c). a lubricant which is liquid at normal temperature;
Having a rough surface portion made of a molding material containing
An elongated resin molded member in which the rough surface portion is formed to have an uneven surface and a large number of small projections made of the solid particles are formed on the uneven surface.
(2) The long resin molded member according to the above (1), wherein the pressure contact portion is pressed against a window glass.
(3) The elongated resin molded member according to (2), wherein the press-contact portion is pressed against the moving window glass.
(4) The long resin molded member according to (1), wherein the pressure contact portion is pressed against a vehicle body panel.
(5) The elongated resin molded member according to (4), wherein the pressure contact portion is attached to a mounting portion that is movable by being pressed against the vehicle body panel.

As mentioned above, although the specific example of this invention was demonstrated in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and alterations of the specific examples illustrated above.
Further, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

It is a side view which shows the motor vehicle in the state where the glass run channel assembly which concerns on an Example was attached to the front door panel. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, showing a glass run channel according to the first embodiment. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 1, showing a glass run channel according to the first embodiment. FIG. 4 shows a glass run channel according to the first embodiment, and is a cross-sectional view taken along the line IV-IV of FIG. 1. It is a partially broken perspective view showing the state where two glass run channels were connected by a joint part. It is explanatory drawing which shows the measuring method of a sliding resistance typically. It is sectional drawing which shows the principal part of the glass run channel concerning 2nd Example. It is sectional drawing which shows the principal part of the glass run channel concerning 3rd Example. It is sectional drawing which shows the principal part of the glass run channel concerning 3rd Example. It is a typical sectional view showing the surface shape of a rough surface part. It is a typical sectional view showing the surface shape of a rough surface part. It is explanatory drawing which shows typically the example of manufacture of the glass run channel of this invention. It is explanatory drawing which shows typically the example of manufacture of the glass run channel of this invention. It is a characteristic view showing the measurement result of sliding resistance. It is a characteristic view showing the measurement result of sliding resistance.

Explanation of reference numerals

1: Front door panel 3: Window glass 10: Glass run channel assemblies 12, 14, 16, 18: Glass run channels 13, 15, 17: Joint section 20: Resin body section 21: Base sections 22, 23: Side wall section 24 : Grooves 251, 252, 253, 254, 255, 257, 258: rough surface portion 257 a: raised portion 257 b: base portion 257 c: top portion 258 a: hem portion 258 b: top portions 26 and 27: lip portion 30: resin body portions 351 and 352 , 353: rough surface portions 36, 37: lip portion 38: metal body portion 40: rough surface portion 41: raised portion 44: solid particle 45: small convex portion

Claims (19)

A long vehicle glass run channel having a groove for guiding the window glass in contact with an edge of the window glass that is attached along a vehicle window frame and moves in the window frame,
The glass run channel has a base portion forming the bottom of the groove, a side wall portion rising from both ends in the width direction of the base portion to form a side wall of the groove, and extending from the side wall portion toward the inside of the groove. A lip portion elastically pressed against the surface of the window glass,
The following components (a) to (c) are provided on at least a portion of the lip portion that comes into pressure contact with the window glass surface:
(a) an olefin-based thermoplastic elastomer in which the content of a polyolefin resin as a hard segment is 50% by mass or more of the whole;
(b) solid particles having an average particle size in the range of 1 to 100 μm; and
(c). a lubricant which is liquid at normal temperature;
Having a rough surface portion made of a molding material containing
A glass run channel for a vehicle, wherein the rough surface portion is formed with a undulating surface, and a large number of small projections made of the solid particles are formed on the undulating surface. The glass run channel according to claim 1, wherein the rough surface portion is further provided on a groove inner surface of the base portion. The glass run channel according to claim 1, wherein the rough surface portion is provided on at least one of a groove inner surface of the side wall portion and a back surface of the lip portion facing the surface. The glass run channel according to any one of claims 1 to 3, wherein the hard segment constituting the olefin-based thermoplastic elastomer is a polypropylene resin, and the soft segment is an ethylene-propylene-diene copolymer. The glass run channel according to any one of claims 1 to 4, wherein the lubricant is a silicone oil. The glass run channel according to any one of claims 1 to 5, wherein the solid particles are made of a material that does not melt when the rough surface portion is formed. The solid particles are one or more spherical particles selected from the group consisting of silicone resin particles, glass beads, glass balloons, silica particles, polymethyl methacrylate resin particles, and polyetheretherketone resin particles, Item 7. The glass run channel according to any one of Items 1 to 6. The said rough surface part contains 1-20 mass parts of said solid particles and 1-20 mass parts of said lubricants with respect to 100 mass parts of said olefinic thermoplastic elastomers, The Claims any one of Claims 1-7. Glass run channel. The (a) has a long resin body portion made of a molding material containing an olefinic thermoplastic elastomer having a lower hardness than the olefinic thermoplastic elastomer, at least a portion of the surface of the resin body portion, the rough surface portion The glass run channel according to any one of claims 1 to 8, wherein a glass run channel is provided. The glass run channel according to claim 9, wherein the resin main body integrally forms the base, the side wall, and the lip. The glass run channel according to claim 9, wherein the resin main body portion and the rough surface portion have compatibility and are welded at a boundary therebetween. The glass run channel according to any one of claims 9 to 11, wherein the rough surface portion is formed in a layer shape, and has an average thickness of 10 to 100 m. In the rough surface portion, a plurality of streaky ridges extending in the longitudinal direction are formed at intervals in the width direction, and the surface of the ridge is constituted by an undulating surface on which the small convex portion is formed. The glass run channel according to any one of claims 9 to 11, which is provided. The rough surface portion is formed in a linear shape extending in a longitudinal direction, and a plurality of the linear rough surface portions are arranged at intervals in a width direction. Glass run channel. At least two elongated vehicular glass run channels having a groove mounted along the vehicle window frame and guiding the window glass in contact with an edge of the window glass moving in the window frame;
A glass run channel assembly for a vehicle, comprising: a joint portion that connects terminals in a longitudinal direction of the glass run channel.
The glass run channel has a base portion forming the bottom of the groove, a side wall portion rising from both ends in the width direction of the base portion to form a side wall of the groove, and extending from the side wall portion toward the inside of the groove. A lip portion elastically pressed against the surface of the window glass,
At least one of the glass run channels is provided on at least a portion of the lip portion that comes into pressure contact with the window glass surface, with the following components (a) to (c):
(a) an olefin-based thermoplastic elastomer in which the content of a polyolefin resin as a hard segment is 50% by mass or more of the whole;
(b) solid particles having an average particle size in the range of 1 to 100 μm; and
(c). a lubricant which is liquid at normal temperature;
Having a rough surface portion made of a molding material containing
A glass run channel assembly for a vehicle, wherein the rough surface portion is formed with an uneven surface, and a large number of small projections made of the solid particles are formed on the uneven surface. In the glass run channel, in which a rough surface portion is provided in a portion that is in pressure contact with the window glass,
(1) .The groove inner surface of the base,
(2) .The groove inner surface of the side wall portion, and
(3) the back surface of the lip portion facing the groove inner surface of the side wall portion,
The glass run channel assembly according to claim 15, wherein the rough surface portion is provided at at least one position of the glass run channel. A method for manufacturing an elongated vehicle glass run channel having a groove that guides the window glass in contact with an edge of the window glass that is attached along a vehicle window frame and moves in the window frame,
The glass run channel has a base portion forming the bottom of the groove, a side wall portion rising from both ends in the width direction of the base portion to form a side wall of the groove, and extending from the side wall portion toward the inside of the groove. A lip portion elastically pressed against the surface of the window glass, the lip portion having a rough surface portion provided at least in a portion pressed against the window glass surface,
The following components (a) to (c):
(a) an olefin-based thermoplastic elastomer in which the content of a polyolefin resin as a hard segment is 50% by mass or more of the whole;
(b) solid particles having an average particle size in the range of 1 to 100 μm; and
(c). a lubricant which is liquid at normal temperature;
By extruding from a resin extrusion mold by heating and melting a molding material for forming a rough surface portion including, a large number of small projections due to the solid particles are formed on the undulating surface while the surface is formed in an uneven state. Forming a rough surface portion of the glass run channel for a vehicle. The rough surface portion is formed on at least a part of the surface of the long resin body portion, and the molding material for forming the rough surface portion and the molding material for forming the resin body portion are heated and melted, and the melted molding material is formed. The manufacturing method according to claim 17, wherein the resin body and the rough surface are molded by simultaneously extruding the resin from the resin extrusion mold. The molding material for forming the rough surface portion is heated and melted, and is extruded from the resin extrusion mold together with the preformed long main body portion, so that the rough surface portion is formed on at least a part of the surface of the long main body portion. The method according to claim 17, wherein the method comprises forming.

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