Rail garnish
A divided resin rail garnish addresses thermal expansion issues by deforming at weak points, reducing gaps and improving vehicle design.
Patent Information
- Application Number
- JP2024017039
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-07
- Publication Date
- 2025-08-20
AI Technical Summary
The thermal expansion of resin rail garnishes in high-temperature environments creates gaps between the ends of the garnish and the vehicle body, impairing the vehicle's design.
The rail garnish is designed with a garnish inner divided into multiple parts in the fore-and-aft direction, allowing it to deform and reduce these gaps by bending at weak points, particularly at the boundary between the A-pillar and roof side rail.
This design effectively minimizes the gaps between the garnish ends and the vehicle body, enhancing the vehicle's aesthetic appeal without compromising structural integrity.
Smart Images

Figure 2025121559000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a resin rail garnish that is provided along an A-pillar and a roof side rail of a vehicle. [Background technology]
[0002] Rail garnishes are provided along the A-pillars and roof side rails of a vehicle (for example, Patent Document 1). Rail garnishes are decorative members that decorate the upper end portions of the vehicle sides, and improve the design of the vehicle sides.
[0003] Since the rail garnish is made of resin, it may thermally expand in a high-temperature environment. Therefore, assuming that the rail garnish will thermally expand in the fore-and-aft direction of the vehicle, a gap is provided in advance between the end of the rail garnish in the fore-and-aft direction of the vehicle and the parting line of the vehicle body. Specifically, for example, a gap is provided in advance between the front end of the rail garnish and the parting line of the fender. Also, a gap is provided in advance between the rear end of the rail garnish and the parting line of the tailgate. [Prior art documents] [Patent documents]
[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-026239 Summary of the Invention [Problem to be solved by the invention]
[0005] However, as described above, the design of the vehicle is impaired by the gap that is provided in advance between the end of the rail garnish in the vehicle longitudinal direction and the parting line of the vehicle body.
[0006] Therefore, an object of the present invention is to provide a rail garnish that can improve the design of a vehicle by reducing the gap between the end in the fore-and-aft direction of the vehicle and the parting line of the vehicle body. [Means for solving the problem]
[0007] The rail garnish of the present invention is a resin rail garnish that is installed along the A-pillar and roof side rail of a vehicle, and has a garnish inner that forms the inside of the vehicle, and is characterized in that the garnish inner is divided into at least two or more parts in the fore-and-aft direction of the vehicle.
[0008] With the above-described configuration, the dividing gap of the garnish inner becomes a weak portion. As a result, when the garnish inner thermally expands in a high-temperature environment, the garnish inner deforms by bending slightly at the dividing gap. As a result, the gap between the end of the garnish inner in the vehicle front-rear direction and the parting line of the vehicle body can be reduced, thereby improving the design of the vehicle.
[0009] In the rail garnish according to the present invention, the garnish inner is preferably divided at least at the boundary between the A-pillar and the roof side rail.
[0010] With the above configuration, the boundary between the A-pillar and the roof side rail, which has the largest curvature in the vehicle longitudinal direction of the garnish inner, becomes a weak part. As a result, when the garnish inner thermally expands in a high-temperature environment, the garnish inner deforms so that the boundary between the A-pillar and the roof side rail, which is the weak part, bulges slightly upward. As a result, the gap between the end of the garnish inner in the vehicle longitudinal direction and the parting line of the vehicle body is reduced, improving the design of the vehicle.
[0011] In the rail garnish of the present invention, it is preferable that the rail garnish is further divided rearward of the boundary between the A-pillar and the roof side rail, and that the dividing gap rearward of the boundary between the A-pillar and the roof side rail is smaller than the dividing gap at the boundary between the A-pillar and the roof side rail.
[0012] With the above configuration, the boundary between the A-pillar and the roof side rail, which has the largest curvature in the vehicle longitudinal direction, becomes the weakest vulnerable part of the garnish inner. As a result, when the garnish inner thermally expands in a high-temperature environment, the garnish inner deforms so that the boundary between the A-pillar and the roof side rail, which is the weakest vulnerable part, preferentially bulges upward slightly. [Effects of the Invention]
[0013] According to the rail garnish of the present invention, the gap between the end in the longitudinal direction of the vehicle and the parting line of the vehicle body can be eliminated, thereby improving the design of the vehicle. [Brief explanation of the drawings]
[0014] [Figure 1] FIG. 1 is a side view of a vehicle according to an embodiment. [Figure 2] FIG. 2 is a side view showing a rail garnish as an example of an embodiment. [Figure 3] FIG. 3 is a perspective view of part A in FIG. 2 as seen from the back side. [Figure 4] FIG. 3 is a perspective view of part B in FIG. 2 as seen from the back side. [Figure 5] FIG. 3 is a perspective view of part C in FIG. 2 as seen from the back side. DETAILED DESCRIPTION OF THE INVENTION
[0015] An example of an embodiment of the present invention will be described in detail below. In the following description, specific shapes, materials, directions, numerical values, etc. are examples for facilitating understanding of the present invention, and can be appropriately changed according to the application, purpose, specifications, etc.
[0016] [Rail garnish] A rail garnish 20 as an example of an embodiment will be described with reference to FIG.
[0017] The rail garnish 20 is a decorative member that decorates the upper end of the side of the vehicle 10, and improves the design of the side of the vehicle 10. As will be described in detail later, the rail garnish 20 of this embodiment can improve the design of the vehicle 10 by reducing the gap between the end of the rail garnish 20 in the vehicle fore-and-aft direction and the parting line of the vehicle body.
[0018] The vehicle 10 of this embodiment is, for example, a hatchback, and has a flip-up or side-opening back door 13. However, the vehicle 10 of the present invention is not limited to a hatchback, and may also be a notchback or a station wagon.
[0019] The rail garnish 20 is provided along the front-rear direction of the vehicle 10 at both ends in the vehicle width direction and at the upper end in the vehicle height direction of the vehicle 10. More specifically, the rail garnish 20 is provided along the A-pillar 15 and the roof side rail 16 of the vehicle 10.
[0020] The A-pillars 15 are located on the left and right sides of the front of the passenger compartment 11 of the vehicle 10, and support a windshield (not shown) and a roof (not shown). The A-pillars 15 improve durability against impacts such as frontal collisions, thereby ensuring a survival space for occupants. The A-pillars 15 are also sometimes referred to as front pillars.
[0021] The roof side rails 16 are frames that form the vehicle frame and are provided so as to extend in the front-rear direction of the vehicle so as to sandwich the roof in the vehicle width direction. The roof side rails 16 are made of metal and have a closed cross section.
[0022] The rail garnish 20 is provided from the parting line 12A of the fender 12 to the parting line 13A of the tailgate 13. In other words, the front end of the rail garnish 20 is formed up to the parting line 12A of the fender 12. The rear end of the rail garnish 20 is formed up to the parting line 13A of the tailgate 13. However, the rail garnish 20 of the present invention is not limited to the rail garnish 20 of this embodiment. It is preferable that each end of the rail garnish 20 of the present invention is formed up to the parting line of the vehicle body (outer panel or exterior part).
[0023] The rail garnish 20 is made of resin. Therefore, it may thermally expand in a high-temperature environment. Therefore, in the past, assuming that the rail garnish 20 would thermally expand in the vehicle longitudinal direction, a gap was provided between the end of the rail garnish 20 in the vehicle longitudinal direction and the parting line of the vehicle body. Specifically, for example, a gap was provided between the front end of the rail garnish 20 and the parting line 12A of the fender 12. Also, a gap was provided between the rear end of the rail garnish 20 and the parting line 13A of the back door 13.
[0024] However, as described above, gaps are provided between the ends of the rail garnish 20 in the vehicle fore-and-aft direction and the parting lines 12A, 13A, which impairs the design of the vehicle 10. Therefore, in the rail garnish 20 of this embodiment, as will be described in detail later, the garnish inner 30 is divided in the vehicle fore-and-aft direction, thereby making it possible to reduce the gaps between the ends of the rail garnish 20 in the vehicle fore-and-aft direction and the parting lines 12A, 13A.
[0025] The rail garnish 20 will be described in further detail with reference to FIGS.
[0026] The rail garnish 20 has a garnish inner 30 that forms the inside of the vehicle, and a garnish outer 40 that forms the outside of the vehicle. The garnish inner 30 and the garnish outer 40 are joined by welding.
[0027] The garnish inner 30 is a portion that is attached to clips 21 provided on the A-pillar 15 and the roof side rail 16 of the vehicle 10. The garnish inner 30 (in FIG. 3, a first inner portion 31 described later) has a fitting hole 39 formed therein into which the clip 21 fits. The garnish inner 30 will be described in further detail below.
[0028] The garnish outer 40 is a part that forms the decorative surface of the rail garnish 20. By configuring the garnish inner 30 and the garnish outer 40 as separate parts, the garnish inner 30 can be made into a complex shape with fitting holes 39, etc., while the garnish outer 40 can be made into a simple shape. This makes it difficult for sink marks to occur when molding the garnish outer 40, and the design is not impaired.
[0029] [Garnish Inner] The inner garnish 30 will be described in detail with reference to FIGS. 2, 4 and 5. FIG.
[0030] The garnish inner 30 is divided into three parts, in order from the front in the vehicle longitudinal direction, namely, a first inner part 31, a second inner part 32, and a third inner part 33. A front dividing gap 34 is formed between the first inner part 31 and the second inner part 32. A rear dividing gap 35 is formed between the second inner part 32 and the third inner part 33.
[0031] With the above-described configuration, the front dividing gap 34 and the rear dividing gap 35 (hereinafter referred to as the dividing gaps) of the garnish inner 30 become weak portions. As a result, when the garnish inner 30 thermally expands in a high-temperature environment, the garnish inner 30 deforms so that the dividing gaps are slightly bent. As a result, the gaps between the vehicle front-rear direction ends of the garnish inner 30 and the parting lines 12A, 13A can be reduced. This can improve the design of the vehicle 10.
[0032] The first inner portion 31 and the second inner portion 32 are divided at the boundary between the A-pillar 15 and the roof side rail 16. In other words, a front dividing gap 34 formed between the first inner portion 31 and the second inner portion 32 is located at the boundary between the A-pillar 15 and the roof side rail 16.
[0033] With the above configuration, the front divided gap 34, which has the largest curvature in the vehicle longitudinal direction of the garnish inner 30, becomes a weak portion. As a result, when the garnish inner 30 thermally expands in a high-temperature environment, the garnish inner 30 deforms so that the front divided gap 34, which is a weak portion, bulges slightly upward. As a result, the gap between the vehicle longitudinal end of the garnish inner 30 and the parting lines 12A, 13A can be reduced. This improves the design of the vehicle 10. Note that the amount of bulging is very small, so it does not affect the design of the vehicle 10.
[0034] Further, a rear dividing gap 35 formed between the second inner portion 32 and the third inner portion 33 is smaller than a front dividing gap 34 formed between the first inner portion 31 and the second inner portion 32 .
[0035] With the above-described configuration, the front divided gap 34, which has the largest curvature in the vehicle longitudinal direction of the garnish inner 30, becomes the weakest fragile part. As a result, when the garnish inner 30 thermally expands in a high-temperature environment, the garnish inner 30 deforms so that the front divided gap 34, which is the weakest fragile part, preferentially bulges upward slightly. Note that, because the amount of bulging is small, it does not affect the design of the vehicle 10.
[0036] The garnish outer 40 is not divided like the garnish inner 30. This does not impair the aesthetic design of the rail garnish 20. When the garnish outer 40 thermally expands in a high-temperature environment, it bends in accordance with the deformation of the garnish inner 30.
[0037] It should be noted that the present invention is not limited to the above-described embodiment and its modifications, and various changes and modifications are possible within the scope of the claims of this application. [Explanation of symbols]
[0038] 10 vehicle, 11 passenger compartment, 12 back door, 12A parting line, 13 fender, 13A parting line, 15 A pillar, 16 roof side rail, 20 rail garnish, 21 clip, 30 garnish inner, 31 first inner part, 32 second inner part, 33 third inner part, 34 front dividing gap, 35 rear dividing gap, 39 fitting hole, 40 garnish outer
Claims
1. A resin rail garnish provided along an A-pillar and a roof side rail of a vehicle, a garnish inner that forms the inside of the vehicle; The garnish inner is divided into at least two parts in the vehicle longitudinal direction. Rail garnish.
2. The rail garnish according to claim 1, The garnish inner is divided at least at the boundary between the A-pillar and the roof side rail. Rail garnish.
3. The rail garnish according to claim 2, the garnish inner is further divided on the vehicle rear side of the boundary between the A-pillar and the roof side rail, a dividing gap on the vehicle rear side of the boundary between the A-pillar and the roof side rail is smaller than a dividing gap at the boundary between the A-pillar and the roof side rail; Rail garnish.
Citation Information
Patent Citations
Roof rail of vehicle
JP1997030334A
Roof molding and manufacturing method of the same
JP2019006399A
Blow molded decorative or protective strip with temperature compensation
US4563374A
Pillar outer garnish attachment structure
WO2020022020A1
Vehicle side part structure
JP2019026239A