Glass Run

Abstract

To provide a glass run which is excellent in wind noise reduction effect and inhibits falling when attached.MEANS FOR SOLVING THE PROBLEM: In a glass run, a bottom wall 20, a vehicle exterior side wall 30, and a vehicle inner side wall 40 form a basic skeleton. The basic skeleton is attached to a door frame groove part 5 formed at a door frame 3, and a door glass 4 is received by an opening of the basic skeleton. Further, the glass run seals vehicle interior-exterior sides of the door glass 4. At the vehicle inner side of the vehicle exterior side wall 30, a vehicle interior hard part 34 having a hardness higher than that of a vehicle exterior side wall body 33 of the vehicle exterior side wall 30. The vehicle interior hard part 34 slidably contacts with the door glass 4 and the vehicle exterior side wall 30 including the vehicle interior hard part 34 makes surface contact with a vehicle exterior surface 24 of the bottom wall 20.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a glass run that is attached to a door frame formed in a door of a vehicle such as an automobile. [Background technology]

[0002] Improving the quietness of automobiles and other vehicles increases passenger comfort and therefore has a strong appeal as a product improvement. Furthermore, electric vehicles, which are expected to rapidly increase in popularity in the future, no longer have engines as they are conventionally equipped. The absence of engine noise leaves road noise and wind noise as the main remaining noises. Therefore, there is a greater need than ever for technologies to reduce these noises.

[0003] Wind noise is the sound generated outside the vehicle cabin when the wind hits the vehicle while it is moving, and then passes through the body of the vehicle and reaches the interior. It is known that the door glass, which is closest to the ears of the passengers inside the vehicle, contributes most to this noise. Measures have been taken to reduce this noise, such as increasing the thickness of the door glass and installing acoustic glass, but the increased weight and cost are obstacles.

[0004] In addition to door glass, glass runs, which are the sealing material between the door glass and the door frame, can also reduce noise, particularly in the high-frequency range of 1 kHz or higher, and studies are being conducted to increase this reduction effect.

[0005] Known noise reduction technology using a glass run is, for example, the technology described in Patent Document 1 below. As shown in Fig. 4, the glass run 100 is formed in a channel shape (with a U-shaped cross section) with a bottom wall 200, an exterior side wall 300, and an interior side wall 400 as its basic framework. A cover lip 340 that abuts against the door glass 600 is formed at the tip of the exterior side wall 300, and an exterior seal lip 310 that protrudes toward the bottom wall 200 and comes into sliding contact with the door glass 600 is formed on the interior side of the vehicle, closer to the bottom wall 200 than the cover lip 340 of the exterior side wall 300.

[0006] Meanwhile, at the tip of interior side wall 400, an interior first seal lip 410 that comes into sliding contact with door glass 600 and an interior second seal lip 420 that is formed closer to bottom wall 200 than interior first seal lip 410 and comes into sliding contact with door glass 600 are both formed facing bottom wall 200, and interior first seal lip 410 and interior second seal lip 420 do not abut against each other when in sliding contact with door glass 600. By forming a plurality of interior seal lips, the effect of blocking transmitted sound in the glass run transmission route indicated by arrow A is increased. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-24388 Summary of the Invention [Problem to be solved by the invention]

[0008] One technique for reducing noise caused by wind is to efficiently channel the vibration energy of the door glass to a part that abuts the door glass and dissipate it, known as impedance matching, but this has not yet been fully explored.

[0009] In the previously filed patent applications Nos. 2022-007095 and 2022-116131, the inventors focused on impedance matching and proposed a glass run that efficiently dissipates the vibration energy of the door glass and reduces noise caused by wind. The above applications are based on a configuration in which a hard portion (thick portion) with a higher hardness than the outer side wall of the glass run is formed on the inner side of the vehicle on the outer side, and the hard portion (thick portion) is brought into sliding contact with the door glass.

[0010] The above application made it possible to reduce noise caused by wind noise, but by forming a hard portion and increasing the rigidity of the exterior side wall, the flexibility and extensibility of the exterior side wall decreased, and when a glass run was attached to the door frame, the exterior side wall was unable to follow the curvature of the door frame, causing the exterior side wall to collapse toward the interior of the vehicle. [Means for solving the problem]

[0011] The present invention provides a glass run that prevents the outer side wall of a vehicle from collapsing toward the inner side of the vehicle when the glass run is attached to a door frame, while maintaining the effect of reducing noise caused by wind noise through impedance matching.

[0012] In order to solve the above problems, the present invention of claim 1 provides a glass run having a basic skeleton including a bottom wall, an exterior side wall, and an interior side wall, the basic skeleton being attached to a door frame, receiving a door glass in an opening of the basic skeleton and sealing the interior and exterior of the door glass, The door frame groove is connected to the door frame, An interior hard portion having a higher hardness than the exterior side wall main body portion of the exterior side wall is formed on the interior side of the vehicle, and the interior hard portion is in sliding contact with the door glass, and the exterior side wall including the interior hard portion is in surface contact with the exterior surface of the bottom wall. death, An exterior hard portion having a higher hardness than the exterior side wall main body portion constituting the exterior side wall is formed on the exterior side of the vehicle, and the exterior hard portion abuts against the door frame with a surface thereof and includes a protrusion abutting against the area of ​​the door frame groove with a surface thereof. The glass run is characterized by the above.

[0013] In the present invention, an interior hard portion that is harder than the exterior side wall main body portion of the exterior side wall is formed on the interior side of the vehicle, and the interior hard portion is in sliding contact with the door glass, so the rigidity of the glass run including the exterior side wall is increased, and impedance matching allows the vibration energy of the door glass to be efficiently channeled and dissipated when it comes into contact with the door glass, thereby reducing wind noise.

[0014] Furthermore, when the glass run is attached to the door frame, the exterior side wall including the interior hard portion abuts against the exterior surface of the bottom wall, thereby preventing the exterior side wall from collapsing toward the interior of the vehicle. Furthermore, an exterior-side hard portion having a harder hardness than the exterior-side-wall main body portion of the exterior-side wall is formed on the exterior side of the vehicle, and the exterior-side hard portion abuts the door frame and includes a protrusion that abuts the door frame groove area. Therefore, the exterior-side hard portion abuts the door frame and the door frame groove area on the exterior side of the vehicle. Therefore, the exterior side wall sandwiched between the interior-side hard portion and the exterior-side hard portion is sandwiched between the door glass and the door frame on both the inside and outside sides of the exterior-side-wall main body portion, thereby increasing the rigidity of the exterior side wall. As a result, the vibration energy of the door glass is efficiently transmitted to the exterior side wall through impedance matching and dissipated by the exterior side wall, i.e., the high attenuation of the glass run.

[0015] The present invention as set forth in claim 2 is the invention as set forth in claim 1, The protrusion is a trapezoid with the door frame groove side being shorter in length. It is a glass run. [Effects of the Invention]

[0017] The glass run has a basic framework consisting of a bottom wall, an exterior side wall, and an interior side wall, and is attached to the door frame. The basic framework receives the door glass in an opening in the framework and seals the inside and outside of the door glass. An interior hard portion is formed on the interior side of the exterior side wall that is harder than the exterior side wall main body portion of the exterior side wall. The interior hard portion slides against the door glass, increasing the rigidity of the glass run including the exterior side wall. Impedance matching allows the vibration energy of the door glass to be efficiently channeled and dissipated when it comes into contact with the door glass, thereby reducing wind noise.

[0018] Furthermore, when the glass run is attached to the door frame, the exterior side wall including the interior hard portion abuts against the exterior surface of the bottom wall, thereby preventing the exterior side wall from collapsing toward the interior of the vehicle. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a front view of an automobile door. [Figure 2] FIG. 2 is a front view showing a glass run used in the door frame of FIG. [Figure 3] 2 is a cross-sectional view taken along the line AA in FIG. 1 showing a glass run according to an embodiment of the present invention [Figure 4] FIG. 1 is a cross-sectional view showing a conventional glass run mounting structure (Patent Document 1). DETAILED DESCRIPTION OF THE INVENTION

[0020] A first embodiment of the present invention will be described with reference to Figs. 1 to 3. Fig. 1 shows a front view of a left front door 1 of an automobile as seen from outside the vehicle. A door frame 3 is attached to the upper part of a door body 2 that constitutes this front door 1. A window opening is formed by the door frame 3 and the upper edge of the door body 2. A glass run 10 is attached to a door frame groove 5 formed in the door frame 3 and inside the door body 2 to guide the raising and lowering movement of the door glass 4. The present invention is applicable not only to the left front door 1, but also to a right front door and left and right rear doors. It is also applicable to sliding doors whose door glass rises and falls.

[0021] 2 is a simplified front view of only the glass run 10, viewed from the vehicle exterior. The glass run 10 is composed of a first extrusion 11 corresponding to the horizontal frame portion of the door frame 3, a second extrusion 12 corresponding to the front vertical frame portion of the front door 1, and a third extrusion 13 corresponding to the rear vertical frame portion. The front end of the first extrusion 11 is connected to the upper end of the second extrusion 12 by a first molded portion 14. The rear end of the first extrusion 11 is connected to the upper end of the third extrusion 13 by a second molded portion 15.

[0022] 3 is a cross-sectional view taken along the line AA in FIG. 1, showing the state when the glass run 10 is inserted into the door frame groove 5 of the door frame 3 so that the grooves 21, 21 narrow the gap between the interior side wall 40 and the exterior side wall 30, and then the door glass 4 is interposed therebetween. The glass run 10 has a basic framework consisting of a bottom wall 20, the exterior side wall 30, and the interior side wall 40, and is formed in a channel shape (with a substantially U-shaped cross section). The connecting portions of the bottom wall 20, the exterior side wall 30, and the interior side wall 40 are connected by the grooves 21, 21 on the exterior and interior sides so as to be able to expand freely in a free state.

[0023] The bottom wall 20 is formed in a generally plate-like shape and has a door glass side surface 22, a door frame groove side surface 23, an exterior side surface 24, and an interior side surface 25. A plurality of bottom wall recesses 26 are formed continuously and parallel to each other in the longitudinal direction on the door glass side surface 22. The thickness of the bottom wall 20 is set to a thickness that allows the exterior side surface 24 of the bottom wall 20 to abut against the interior side of the exterior side wall 30 when the bottom wall 20 and the exterior side wall 30 are bent at the groove portion 21.

[0024] An interior support lip 43 and an abutment rib 44 are formed on the interior side of the interior side wall 40 near the joint with the bottom wall 20 and toward the tip of the interior side wall 40. The interior support lip 43 and the abutment rib 44 abut against the door frame groove 5, which has a curved portion, with the curved portion sandwiched between them. The interior side of the interior side wall 40 abuts against the curved portion. A cover lip 45 is formed at the tip of the interior side wall 40.

[0025] The interior seal lip has a first interior seal lip 41 extending from the exterior surface of the interior side wall 40, and a second interior seal lip 42 formed closer to the bottom wall 20 than the first interior seal lip 41. Both the first interior seal lip 41 and the second interior seal lip 42 extend closer to the bottom wall 20. The second interior seal lip 42 is formed thicker than the first interior seal lip 41 in order to increase the pressing force against the interior surface of the door glass 4.

[0026] Furthermore, a sub-lip 46 is formed between the second interior seal lip 42 and the bottom wall 20, protruding obliquely toward the interior side surface of the second interior seal lip 42 and toward the base of the second interior seal lip 42. The sub-lip 46 abuts against the interior surface of the second interior seal lip 42.

[0027] An interior hard portion 34 is formed on the interior side of the exterior side wall 30, which abuts against the exterior surface of the door glass 4. The interior hard portion 34 has a higher hardness than the exterior side wall main body portion 33. The interior hard portion 34 extends to the vicinity of the groove portion 21 at the connecting portion between the bottom wall 20 and the exterior side wall 30.

[0028] The interior hard portion 34 is formed to protrude toward the interior of the vehicle beyond an area where the interior hard portion 34 is not formed. This allows the interior hard portion 34 to reliably slide against the door glass 4. By having the door glass 4 slide against the interior hard portion 34, which has a harder hardness than the exterior side wall main body portion 33 formed on the exterior side wall 30, the difference in rigidity between the door glass 4 and the interior hard portion 34 is reduced, and impedance matching allows vibrations of the door glass 4 to be efficiently channeled to the interior hard portion 34 and dissipated, thereby reducing noise caused by wind.

[0029] A plurality of convex ribs 36 are formed continuously in parallel in the longitudinal direction on the interior surface of the interior hard portion 34. The ribs 36 prevent dust, dirt, foreign matter, etc. from getting caught in the interior hard portion 34 when the door glass 4 is raised or lowered, thereby preventing the generation of abnormal noise.

[0030] A cover lip 38 is formed at the outer-side end 37 of the outer-side wall 30, facing the door glass 4 and opposite the bottom wall 20. The cover lip 38 abuts against the outer surface of the door glass 4, preventing rainwater and dust from entering the interior-side hard portion 34 and preventing deterioration of the interior-side hard portion 34. It also improves the sealing performance with the door glass 4. A locking portion 39 is formed at the base of the cover lip 38, facing the exterior of the vehicle, and secures the end of the pillar garnish 6.

[0031] An exterior retaining lip 31 that is engaged with the door frame groove 5 is formed on the exterior side of the exterior side wall 30 near the joint with the bottom wall 20. When the glass run 10 is attached to the door frame groove 5, the exterior retaining lip 31 abuts against the door frame groove 5 so that its tip is bent.

[0032] In addition, a protrusion 32 is formed on the outer side wall 30 on the tip side of the outer side retaining lip 31 on the outer side of the vehicle, which abuts against the area of ​​the door frame groove 5 of the door frame 3 that has not been hemmed.

[0033] Furthermore, an exterior hard portion 35 having a harder hardness than the exterior sidewall main body portion 33 is formed on the exterior side of the vehicle in a region extending from the hemmed portion that abuts against the door frame 3 to the protrusion 32. Therefore, on the exterior side of the vehicle exterior sidewall 30, the exterior hard portion 35 abuts the door frame 3 and the door frame groove 5 on a surface thereof. As a result, the interior and exterior sides of the exterior sidewall main body portion 33 of the vehicle exterior sidewall 30, sandwiched between the interior hard portion 34 and the exterior hard portion 35, are sandwiched between the door glass 4 and the door frame 3, thereby increasing the rigidity of the exterior sidewall 30. As a result, the vibration energy of the door glass 4 is efficiently transmitted to the exterior sidewall 30 by impedance matching and can be dissipated by the high attenuation of the exterior sidewall 30, i.e., the glass run 10.

[0034] In this embodiment, the glass run 10, excluding the interior hard portion 34 and the exterior hard portion 35, is made of an olefin-based thermoplastic elastomer (TPO) with an IRHD (International Rubber Hardness) of 80±5, and the interior hard portion 34 and the exterior hard portion 35 are made of TPO with an IRHD of 100±5 by extrusion molding.

[0035] As shown in Fig. 3, the interior hard portion 34 extends to the vicinity of the groove portion 21 at the connection portion between the bottom wall 20 and the exterior side wall 30, and the exterior surface 24 of the bottom wall 20 abuts against the exterior side wall 30, including the interior hard portion 34 of the exterior side wall 30, with its surface abutting. Therefore, when the glass run 10 is attached to the door frame 3, the exterior surface 24 of the bottom wall 20 abuts against the interior hard portion 34 of the exterior side wall 30, thereby preventing the exterior side wall 30 from collapsing toward the interior of the vehicle. Note that if the interior hard portion 34 does not extend to the vicinity of the groove portion 21 at the connection portion between the bottom wall 20 and the exterior side wall 30 and the exterior surface 24 of the bottom wall 20 abuts only against the exterior side wall main body portion 33 of the exterior side wall 30, deformation that causes the exterior side wall 30 to collapse toward the interior of the vehicle occurs near the abutment portion, which is not preferable. 3, the interior surface 25 of the bottom wall 20 does not abut against the interior side wall 40. This is because the interior side wall 40 has more flexibility and extensibility than the exterior side wall 30, and can therefore follow the curvature of the door frame groove portion 5.

[0036] Therefore, the glass run 10 having the above structure can prevent the outer side wall 30 from collapsing toward the inside of the vehicle when the glass run 10 is attached to the door frame groove portion 5 of the door frame 3, while maintaining the effect of reducing noise caused by wind noise due to impedance matching.

[0037] In the embodiment of the present invention, the glass run 10 can be made of a material such as rubber, thermoplastic elastomer, or soft synthetic resin. In the case of rubber, EPDM (ethylene propylene diene rubber) is preferable, and in the case of thermoplastic elastomer, olefin-based thermoplastic elastomer (TPO) or dynamically crosslinked thermoplastic elastomer (TPV) are preferable from the viewpoints of weather resistance, recyclability, cost, etc.

[0038] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the object of the present invention.

[0039] The above embodiment is for the third extrusion molding portion 13, but it can also be applied to the first extrusion molding portion 11 corresponding to the horizontal frame portion of the door frame 3 and the second extrusion molding portion 12 corresponding to the front vertical side portion. [Explanation of symbols]

[0040] 1. Front door 2 Door body 3 Door Frame 10 Glass Run 20 Bottom Wall 24 Exterior side of the vehicle 30 Outside side wall 32 Convex part 33 Vehicle exterior side wall main body 34 Hard part inside the car 35 Hard part outside the vehicle 40 Inner side wall 41 Inner seal lip

Claims

1. a glass run having a basic framework including a bottom wall, an exterior side wall, and an interior side wall, the basic framework being attached to a door frame, the glass run receiving a door glass in an opening of the basic framework and sealing the interior and exterior of the door glass, A door frame groove is connected to the door frame, an interior-side hard portion having a harder surface than the exterior-side wall main body portion of the exterior-side wall is formed on an interior side of the exterior-side wall; the vehicle interior hard portion is in sliding contact with the door glass, the vehicle exterior side wall including the vehicle interior hard portion abuts on a vehicle exterior surface of the bottom wall by a surface thereof, an exterior hard portion having a harder surface than an exterior side wall main body portion constituting the exterior side wall is formed on an exterior side of the exterior side wall; The vehicle exterior hard portion is in surface contact with the door frame and includes a protrusion that is in surface contact with the groove region of the door frame.

2. A glass run as described in Claim 1, wherein the convex portion is a trapezoid with a shorter length on the door frame groove portion side.

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