KR102462011B1 - Roof lack - Google Patents

Abstract

The present invention provides a first sidewall and a second sidewall spaced apart from each other, and an upper member connecting the first sidewall and the second sidewall, respectively, extending along the longitudinal direction; and a stent fixed to the rail and having a base portion extending along the longitudinal direction of the rail; including, wherein the first sidewall and the second sidewall have an asymmetric structure with respect to the centerline in the width direction of the base part, and the upper member includes a first extension line extending along the inner circumferential surface of the first sidewall and the inner circumferential surface of the second sidewall When defined as a region between the second extension lines extending along the sectional area of the first sidewall to the second sidewall, it is intended to provide a roof rack, which is provided to have a ratio of 1:0.6 to 1:1.

Description

Roof Rack {ROOF LACK}

The present invention relates to a plastic roof rack for a vehicle.

In general, the transport of cargo using a vehicle uses the trunk of the vehicle. In the case of a large-volume cargo or a long cargo that is difficult to use the trunk space, it is transported using a roof rack.

In addition, the roof rack is fixed to the roof panel, which is the upper surface of the vehicle's roof, and a clamp can be attached to the roof rack to load relatively bulky cargo such as camping equipment or leisure equipment such as skis to the roof rack. . Nowadays, with the popularization of recreational vehicles (SUVs; Sport Utility Vehicles, RVs; Recreational Vehicles) and the boom of leisure travel such as camping, roof racks are widely used.

On the other hand, although the roof rail is manufactured by injection molding using plastic, there is a problem in that the product's marketability is remarkably reduced due to bending or shape deformation due to shrinkage in the cooling process.

In addition, the roof rack according to the prior art is manufactured by extrusion molding at a high temperature as an integral type in which the rail and the stent are not separated. There is a problem with the formation. That is, there is a problem in that the commerciality of the product is significantly lowered due to the external shrinkage (Sink Mark) due to the inner rail structure.

The present invention has been devised to solve the above problems, and in a rail having a first sidewall and a second sidewall, the cross-sectional area of the first sidewall and the second sidewall is designed in a ratio of 1: 0.6 to 1:1, and a plastic rail is injected. It has the effect of preventing bending in the width (width) direction during molding.

In addition, by separating the rail and stent of the roof rack and joining them by vibration welding, the rail shrinkage is prevented and the appearance quality defect caused by the sink mark formation is prevented in advance to provide a roof rack with secured exterior quality. There is a purpose.

In addition, an object of the present invention is to provide a method for manufacturing a roof rack for manufacturing a roof rack, improving the appearance quality of rails and stents, and more easily manufacturing a roof rack.

In order to achieve the above object, according to one aspect of the present invention, the first sidewall and the second sidewall spaced apart by a predetermined distance, the upper member for connecting the first sidewall and the second sidewall is formed to extend along the longitudinal direction, respectively; and a stent fixed to the rail and having a base portion extending along the longitudinal direction of the rail; including, wherein the first sidewall and the second sidewall have an asymmetric structure with respect to the centerline in the width direction of the base part, and the upper member includes a first extension line extending along the inner circumferential surface of the first sidewall and the inner circumferential surface of the second sidewall The cross-sectional area of the first sidewall to the second sidewall, when defined as a region between the second extension lines extending along, provides a roof rack, which is provided to have a ratio of 1:0.6 to 1:1.

Further, the first sidewall has a first region in which at least a partial region is provided to increase and decrease in thickness from the upper member side toward the base portion, and a second region formed extending from the first region toward the base portion.

In addition, the second region may be provided to be bent at a predetermined angle toward the outside with respect to the first extension line.

In addition, the second region of the first sidewall includes a first side that has a predetermined first thickness and is formed to protrude toward the base portion along the outer circumferential surface of the second region with a second thickness that is smaller than the first thickness at the end of the second region. include

In addition, the second sidewall includes a second side portion in which at least a partial region has a third thickness and is formed to protrude toward the base portion along an outer circumferential surface of the second sidewall with a fourth thickness smaller than the third thickness.

Also, the maximum width of the cross-section of the first sidewall may be greater than the maximum width of the cross-section of the second sidewall.

Further, the base portion has a first surface facing the upper member and a second surface opposite to the first surface, and the roof rack has the first and second side portions and the second surface of the base portion not in contact with the roof panel of the vehicle body. It further includes a pad formed to extend along the longitudinal direction.

In addition, each of which is located at a predetermined distance apart along the longitudinal direction of the pad, includes a mounting protrusion protruding toward the second surface of the base portion, the base portion includes a through hole through which the mounting protrusion is inserted.

In addition, the mounting protrusion may be provided such that a pair of fastening hooks are provided at a predetermined distance apart, and each fastening hook is inserted into the through hole to be caught and fixed in a portion of the through hole.

According to the present invention, by providing a ratio of the first sidewall and the second sidewall to have a ratio of 1:0.6 to 1:1, bending of the rail toward any one sidewall, that is, in the width (width) direction, is prevented during injection molding. be able to do

In addition, since a predetermined space is provided between the joint portion and the first and second side portions, the joint portion is prevented from being welded to the first and second side portions, respectively, thereby preventing the outer appearance of the rail from shrinking.

In addition, according to the present invention, as the rail is stably seated in a fixed position on the stent, the welding of the rail and the stent can be made more easily.

In addition, according to the present invention, it is possible to support the pressure during vibration welding of the rail and the stent by the reinforcing ribs, and the rigidity of the roof rack product can be reinforced as the rigidity of the stent is reinforced.

1 is a front view and a perspective view showing a roof rack according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of Figure 1;
3 is a cross-sectional view of a rail according to an embodiment of the present invention.
4 is a cross-sectional view of a roof rack according to an embodiment of the present invention.
5 is a partially enlarged view of a stent and a stent according to an embodiment of the present invention.
6 is a cross-sectional view taken along portions A-A' and B-B' of FIG. 5 .
7 and 8 are views and a-a' cross-sectional views illustrating the first member in a state in which the rail, the stent, and the mounting bolt are fastened according to an embodiment of the present invention.
9 and 10 are views and b-b' cross-sectional views illustrating a second member in a state in which a rail, a stent, and a mounting bolt are fastened according to an embodiment of the present invention.
11 is a view illustrating a state in which a stent fixed to a cover and a pad are fastened according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

In addition, regardless of the reference numerals, the same or corresponding components are given the same or similar reference numbers, and overlapping descriptions thereof will be omitted, and the size and shape of each component shown for convenience of description is exaggerated or reduced. can be

Therefore, the configuration shown in the embodiments and drawings described in the present specification is merely the most preferred embodiment of the present invention and does not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

The present invention relates to a plastic roof rack (10) for a vehicle.

Hereinafter, with reference to the accompanying drawings, the roof rack 10 according to an embodiment of the present invention will be described in detail.

1 is a front view and a perspective view showing a roof rack 10 according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view of a rail 100 according to an embodiment of the present invention. 4 is a cross-sectional view of the roof rack 10 according to an embodiment of the present invention.

First, referring to FIGS. 1 and 2 , the roof rack 10 according to an embodiment of the present invention includes a rail 100 and a stent 200 . In particular, the pad 400 may further include a mounting bolt 300 for connecting to the vehicle body, and a pad 400 for preventing the rail 100 and the stent 200 from contacting the roof panel (the upper surface of the vehicle roof).

In addition, a plurality of mounting bolts 300 provided at a predetermined distance apart to connect the rail and the vehicle body may be provided on the roof panel of the vehicle.

Here, the roof rack 10, a clamp (Clamp, not shown) may be additionally mounted and used.

Referring to FIG. 4 , the rail 100 includes a first sidewall 110 and a second sidewall 120 spaced apart by a predetermined distance, and an upper member 130 connecting the first sidewall 110 and the second sidewall 120 . may be formed to extend along the longitudinal direction, respectively.

That is, the rail 100 may have a hollow area inside and an open shape at the bottom. Accordingly, the stent 200 may be inserted and fixed in the hollow region of the rail.

In addition, the stent 200 is fixed to the rail 100 and has a base portion 210 extending in the longitudinal direction of the rail 100 .

Here, the first sidewall 110 and the second sidewall 120 have an asymmetric structure with respect to the center line C1 in the width direction of the base part 210 .

When the upper member 130 is defined as a region between the first extension line L1 extending along the inner circumferential surface of the first sidewall 110 and the second extension line L2 extending along the inner circumferential surface of the second sidewall, the second A cross-sectional area of the first sidewall to the second sidewall may be provided to have a ratio of 1:0.6 to 1:1.

That is, the first extension line L1 may divide the upper member 130 and the first sidewall 110 , and the second extension line L2 may separate the upper member 130 and the second sidewall 120 . can be partitioned.

Accordingly, the cross-sectional area A1 of the first sidewall 110 may be defined by the first extension line L1 provided to be partitioned from the upper member 130 , and the cross-sectional area A2 of the second sidewall 120 is , may be defined by a second extension line L2 provided to be partitioned from the upper member 130 .

More specifically, in the first sidewall 110 , the first region 1101 and the first region 1101 are provided such that at least a partial region increases and decreases in thickness from the upper member 130 side toward the base portion 210 . ) and a second region 1102 formed extending from the .

The first region 1101 may be located adjacent to the upper member 130 side.

The second region 1102 may be provided to be bent at a predetermined angle toward the outside with respect to the first extension line L1.

That is, the terminal side of the first sidewall may be provided to be curved outwardly to have a predetermined angle from the first extension line L1 .

In addition, the second region 1102 of the first sidewall has a predetermined first thickness t1, and has a second thickness t2 that is smaller than the first thickness t1 at the end of the second region. The first side portion 111 is formed to protrude toward the base portion 210 along the outer circumferential surface of the second region.

That is, the first side portion 111 of the first sidewall may be formed to extend downward by a predetermined length along the outer circumferential surface from the end of the second region to the second thickness t2.

In addition, the second sidewall 120 has a third thickness t3 in at least a partial region, and has a fourth thickness t4 smaller than the third thickness t3 along the outer circumferential surface of the second sidewall toward the base portion. It includes a protruding second side portion 121 .

Specifically, the second sidewall 120 includes a third region 1201 having a predetermined thickness and a fourth region 1202 having a smaller thickness than the third region.

The third region 1201 may be positioned adjacent to the upper member.

Also, the fourth region 1202 may have a third thickness t3.

That is, the second side portion 121 of the second sidewall may extend downward by a predetermined length along the outer circumferential surface from the end of the fourth region to the fourth thickness t4.

Meanwhile, the maximum width W1 of the cross-section of the first sidewall 110 may be greater than the maximum width W2 of the cross-section of the second sidewall 110 .

As described above, the first sidewall 110 may have a curved region curved by the first region and the second region.

The first sidewall having the bent region can support a greater load than the second sidewall when the clamp is mounted on the roof rack and a load is applied.

That is, by providing the first sidewall to have a greater width than the bent region and the second sidewall, it is possible to support a greater load than the second sidewall.

In addition, as described above, the rail 100 of the present invention has an approximately 'C' shape, and the first sidewall and the second sidewall have an asymmetrical structure with respect to the center line C1.

In particular, the cross-sectional area of the first sidewall 110 to the second sidewall 120 may be 1:0.6 to 1:1.

That is, referring to the parts indicated in green in FIG. 3 , the ratio of the cross-sectional area A1 of the first sidewall 110 to the cross-sectional area A2 of the second sidewall 120 is the cross-sectional area of the first sidewall 110 ( When A1) is 1, the cross-sectional area A2 of the second sidewall 120 may have a ratio of 0.6 to 1.

More preferably, the ratio of the cross-sectional area A1 of the first sidewall 110 to the cross-sectional area A2 of the second sidewall 120 is 1:0.6 to 1:1, or 1:0.7 to 1:1, or 1: 0.8 to 1:1, or 1:0.9 to 1:1, or 1:0.95 to 1:1, or 1:1.

As described above, when the ratio of the cross-sectional area of the second sidewall with respect to the first sidewall deviates from the above-described value, the shrinkage rate according to the cooling time during injection molding is different, so that the width (width) direction of the side wall having a greater thickness Accordingly, there is a problem that the bending of the rail occurs.

By forming the rail 100 of the present invention to have the cross-sectional area ratio as described above, it is possible to prevent the occurrence of warpage due to shrinkage during injection molding.

Meanwhile, the second thickness t2 and the fourth thickness t4 may be provided with a smaller thickness (thinner) than the first and third thicknesses t1 and t3 (ie, t2 < t1 and t4 < t3). , for example, the second thickness t2 and the fourth thickness t4 may be 0.5 to 4 mm.

The first side portion 111 and the second side portion 121 having the second thickness t2 and the fourth thickness t4 formed as described above, respectively, to maintain and/or support the outer shape of the lower end of the side wall of the rail. can be provided.

Here, the rail 100 may have a shape inclined at a predetermined angle, for example, a distorted figure shape, but is not limited thereto.

In addition, the rail 100 and the stent 200 may be made of an engineering plastic (eg, PP, PA6, PA66, ABS, PP+EPDM, PC+ABS) material. In addition, the rail 100 and the stent 200 may be made of fiber-reinforced plastic in consideration of weight reduction and durability.

In addition, the fiber-reinforced plastic is a base resin with reinforcing fibers added thereto, and polyester resin, polyamide resin, nylon resin, etc. may be used as the base resin, and carbon fiber and/or glass fiber may be used as the reinforcing fiber.

And fiber reinforced plastics include glass fiber reinforced plastics, carbon fiber reinforced plastics, continuous fiber reinforced plastics, continuous glass fiber reinforced plastics, continuous carbon fiber reinforced plastics, short fiber reinforced plastics, short glass fiber reinforced plastics, and short carbon fiber reinforced plastics. , long fiber reinforced plastic, glass long fiber reinforced plastic, short glass fiber reinforced plastic, etc., but is not limited thereto.

5 is a partially enlarged view of the stent 200 according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along portions A-A' and B-B' of FIG. 5 .

Meanwhile, referring to FIGS. 5 and 6 , the stent 200 may be bonded to a predetermined area of the rail 100 , and a mounting bolt 300 to be connected to the vehicle may be provided to be bound.

The stent 200 has a first surface 211 facing the upper member of the rail 100 and a second surface 212 opposite to the first surface 211 in the longitudinal direction of the rail 100 . and a base portion 210 extending along the .

More specifically, the base portion 210 is bonded to at least a partial region of the longitudinal cross-sections 110a and 120a of the first sidewall 110 and the second sidewall 120 along the longitudinal direction at both edges of the first surface, respectively. a junction 220 .

Here, the upper side one surface (one side of the first surface side) of the bonding part 220 is bonded to at least a partial region of the longitudinal cross-sections 110a and 120a of each of the first sidewall and the second sidewall, and the upper side so that bonding is made more easily The cross-sectional shape of may have, for example, a triangular, quadrangular, or trapezoidal shape, but is not limited thereto.

In addition, considering that a part of the joint is welded (fused), the length L of the joint may be provided.

Here, at least a portion of the joint portion 220 and the longitudinal cross-sections 110a and 120a of the first sidewall and the second sidewall may be joined by vibration welding.

The vibration welding is, while pressing two thermoplastic resins between products, vibration is given in one direction (unidirectional) amplitude (for example, vibration is applied to the upper jig) to melt the resin with frictional heat generated at the contact area, and sufficient When the vibration is stopped after the melt is obtained, the product is aligned, and it is cooled and hardened while continuing to press, which means a method of fusion bonding.

In addition to this, the stent 200 is formed to protrude from the first surface of the base part 210 , and is bonded to the upper member of the rail in a predetermined area, and the first member 240 provided to be coupled with the mounting bolt 300 . Including, the first member 240 has a recessed portion 241 recessed inwardly in the longitudinal section 240a adjacent to the upper member of the rail.

Specifically, the first member 240 has a predetermined width w3 and a length L3.

The recessed part 241 may be provided such that a central region of the longitudinal cross-section 240a adjacent to the upper member of the rail 100 is recessed inwardly by a predetermined depth along the width direction.

Here, the recessed part 241 may be provided to prevent an excessive thickness of the first member 240 in the width direction. For example, a width 241w of the recessed part 241 may be 5 to 20 mm. , and the height 241h may be 5 to 25 mm, but is not limited thereto.

In addition, the first member 240 includes a mounting portion 245 provided to protrude from the second surface of the base portion 210 to be coupled to the mounting bolt 300 .

Here, the mounting bolt 300 may be formed on the roof panel of the vehicle body, and the mounting part 245 corresponds to the mounting bolt so that the mounting bolt 300 is inserted and bound (same structure or shape). ) can be provided.

The first member 240 includes a pair of first bonding ribs 2431 protruding from the longitudinal end surface 240a so as to contact the inner circumferential surface of the rail upper member along the longitudinal direction, and a pair of first bonding ribs ( 2431 is disposed at a predetermined interval and includes at least one or more first reinforcing ribs 2433 provided along the width direction to connect between the pair of first bonding ribs 2431 .

Here, the pair of first bonding ribs 2431 may be provided to have a width of 0.5 to 5 mm, but is not limited thereto.

In addition, the first reinforcing ribs 2433 may be provided, for example, to connect between a pair of first bonding ribs at a predetermined distance apart from each other, but is not limited thereto, and a plurality of first reinforcing ribs 2433 are provided. ) may reinforce and support the pair of first bonding ribs 2431 .

In addition, the stent 200 includes a second member 250 that is spaced apart from the first member 240 in the longitudinal direction by a predetermined distance and is provided to be bonded to the upper member of the rail in a predetermined area.

The second member 250 is formed to protrude from the first surface of the base part, and has a hollow part 251 therein.

Specifically, the second member 250 is provided to be bonded to the upper member of the rail in a predetermined area, and has a predetermined width w4 and a predetermined length L4.

Here, the width w3 and the length L3 of the first member may be provided to be the same as the width w4 and the length L4 of the second member, respectively, but is not limited thereto.

The second member 250 includes second and third bonding ribs 2531 and 2532 protruding from the longitudinal section 250a so as to be in contact with the inner circumferential surface of the rail upper member along the longitudinal direction and disposed at a predetermined distance apart. .

The second and third bonding ribs 2531 and 2532 may be spaced apart by a predetermined distance along the width direction, and the fourth bonding rib 2533 disposed between the second and third bonding ribs 2531 and 2532 is formed. may include more.

The second member 250 includes a second reinforcing rib 2535 protruding into the hollow portion 251 between the second and third bonding ribs 2531 and 2532 .

The second reinforcing rib 2535 may be formed to protrude from the inner circumferential surface of the hollow portion 251 of the second member 250 toward the base portion 210 .

In particular, the fourth bonding rib 2533 and the second reinforcing rib 2535 may be provided on the same axis, but is not limited thereto.

7 and 8 are views and a-a' cross-sectional views illustrating the first member in a state in which a rail, a stent, and a mounting bolt are fastened according to an embodiment of the present invention, FIGS. 9 and 10 are the present invention A drawing and b-b' cross-sectional view illustrating the second member in a state in which the rail, the stent, and the mounting bolt are fastened according to an embodiment of the present invention.

Referring to FIGS. 7 to 10 , a predetermined space s is provided between the bonding portion 220 and the first side portion 111 , and the bonding portion 220 and the second side portion 121 of the present invention, respectively.

More specifically, the bonding portion 220 may be spaced apart from each other by a predetermined distance so as not to contact the first side portion 111 and the second side portion 121 , respectively.

The width w of the predetermined space s may be 0.1 to 4 mm, but is not limited thereto.

As described above, since there is a predetermined space (s) between the junction part 220 and each of the first side part 111 and the second side part 121, the junction part has the first side part 111 and the second side part ( 121), there is an effect of preventing the outer appearance of the rail from being contracted.

In addition, the base portion 210, between the first member 240 and the bonding portion 220, the longitudinal cross-sections 110a and 120a of the first sidewall 110 and the second sidewall 120 are the bonding portion 220. It has an inclined surface 230 provided to guide it to be seated on each.

The first member and the joint portion and the second member and the joint portion may be respectively connected to each other by the inclined surface 230 .

More specifically, the inclined surface 230 may be defined as a region between the outer peripheral surfaces of the first and second members 240 and 250 adjacent to each of the sidewalls 110 and 120 and the connecting portion 220 .

The inclined surface 230 may be provided to have a predetermined angle with respect to the width direction of the junction part 220 .

In addition, the inclined surface 230 is, the first and second sidewalls 110 and 120 of the inner peripheral side of the edge (110b, 120b) of the edge of the inclined surface 230 is connected to the junction 220 at the edge 230b). By guiding the positions to be respectively seated, the longitudinal cross-sections of the first sidewall and the second sidewall are respectively seated on the junction 220 , that is, the rail may be disposed at the correct position of the junction part.

Here, the regular position means that the edge of the inner peripheral side end of the first sidewall 110 and the second sidewall 120 is in contact with the edge of the inclined surface 230 connected to the junction.

As described above, as the rail is stably seated in a fixed position on the stent, the welding of the rail and the stent can be made more easily.

In addition, referring to FIG. 7 , the first member 240 may be inserted at a predetermined distance apart from the inner peripheral surfaces of the first and second sidewalls 110 and 120 .

Specifically, the outer circumferential surface of the first member 240 adjacent to the inner circumferential surface of the first and second sidewalls 110 and 120 is spaced apart from the inner circumferential surface of the first and second sidewalls 110 and 120 by a predetermined distance. are placed

That is, the width w3 of the first member may be provided to be smaller than the width of the inner circumferential surface of the rail (interval between the first and second sidewalls).

In addition, the upper surface of the pair of first bonding ribs 2431 may be joined by being in contact with the inner circumferential surface of the upper member 130 of the rail 100 , and a portion of the pair of first bonding ribs 2431 . In consideration of the welding, the length of the pair of first bonding ribs 2431 may be provided.

In particular, the pair of first bonding ribs 2431 and the inner peripheral surface of the rail upper member may be bonded by vibration welding.

9 and 10 , the second member 250 may be inserted at a predetermined distance apart from the inner peripheral surfaces of the first and second sidewalls 110 and 120 .

Specifically, the outer peripheral surfaces of the second member 250 adjacent to the inner peripheral surfaces of the first and second side walls 110 and 120 are disposed to be spaced apart from the inner peripheral surfaces of the first and second side walls 110 and 120 by a predetermined distance. do.

That is, the width w2 of the second member may be provided to be smaller than the width of the inner circumferential surface of the rail (interval between the first and second sidewalls).

In addition, the upper surfaces of the second and third bonding ribs 2531 and 2532 may be joined by being in contact with the inner circumferential surface of the upper member 130 of the rail 100, and the second and third bonding ribs 2531, 2531, 2532) Considering that a portion is welded, the lengths of the second and third bonding ribs 2531 and 2532 may be provided.

In addition, the upper surface of the fourth bonding rib 2533 may be joined by coming into contact with the inner circumferential surface of the upper member 130 of the rail 100, considering that a portion of the fourth bonding rib 2533 is welded, The length of the fourth bonding rib 2533 may be provided.

Here, the second to fourth bonding ribs 2531 , 2532 , and 2533 may be bonded to the inner peripheral surface of the rail upper member by vibration welding.

That is, the bonding portion 220 and the first to third bonding ribs 2431 , 2531 , and 2532 may be bonded to the rail by vibration welding, respectively.

Here, the fourth bonding rib 2533 may also be bonded to the rail by vibration welding.

In addition, the second reinforcing rib 2535 has an effect of supporting the product reinforcement and vibration welding pressure of the stent.

Here, the second reinforcing rib 2535 may be formed to extend along the longitudinal direction of the second member 250 .

For example, the side cross-section of the second reinforcing rib 2535 may have an approximately 'C' shape, but is not limited thereto.

In addition, a third reinforcing rib 2536 extending from the second reinforcing rib may be provided on the second surface 212 of the base portion to protrude from the second surface 212 of the base portion.

By the reinforcing ribs formed as described above, it is possible to support the pressure during vibration welding of the rail and the stent, and as the rigidity of the stent is reinforced, the rigidity of the roof rack product can be reinforced.

On the other hand, the stent 200 of the present invention includes a third member 260 that is bonded to the upper member of the rail in a predetermined area and protrudes from the first surface of the base part.

The third member 260 may be provided with the same structure and function as the second member 250 except for a different arrangement position from the above-described second member 250 . Accordingly, a detailed description of the third member 260 will be omitted.

Referring to FIG. 2 , the stent 200 of the present invention includes a plurality of the above-described first to third members 240 , 250 , and 260 , respectively.

That is, a plurality of first to third members 240 , 250 , and 260 may be disposed on the base part 210 .

More specifically, the first member 240 is disposed on the base portion at a first interval d1, respectively, and the second member 250 is disposed on both sides of the first member 240 at a first interval d1, respectively. The second member 240 may be disposed adjacent to each other by a smaller second distance d2, and the third member 260 may be disposed in the center between the two first members 240 adjacent to each other.

As described above, by arranging the second members 250 on both sides of the first member 240 coupled to the vehicle body mounting bolt 300 , the rigidity of the first member can be reinforced, and in addition, the third member 260 . ) by arranging them at a predetermined interval, it is possible to reinforce the rigidity of the roof rack.

Here, the second interval d2 may be 10 to 100 mm, but is not limited thereto.

When loading a product into a welding jig for vibration welding, in the same interval range (10 to 100 mm) as above, the product length per part is reduced to improve stability (workability), and to limit the influence of position distribution to ensure stability This has the effect of securing the welding tendency.

11 is a view illustrating a state in which a stent fixed to a pad and a cover according to an embodiment of the present invention is fastened.

Referring to FIG. 11 , the roof rack 10 according to an embodiment of the present invention has a pad 400 extending in the longitudinal direction so that the first and second sides and the second surface of the base do not come into contact with the roof panel of the vehicle body. further includes.

The pad 400 is disposed in the longitudinal direction so that the longitudinal cross-sections 111a and 121a of each of the first and second sides of the rail 100 and the second surface 212 of the base of the stent do not come into contact with the roof panel of the vehicle body. may be formed to extend along the

In addition, the pad 400 includes a plurality of second through-holes 410 formed to allow the mounting portion to pass therethrough at positions corresponding to the mounting portion 245 .

In addition, the pads 400 are respectively positioned at a predetermined distance apart along the length direction of the pad, and include mounting protrusions 420 protruding toward the second surface of the base portion.

At this time, the base portion 210 includes a first through hole 270 through which the mounting protrusion 420 is inserted.

The first through-holes 270 may be respectively provided at positions corresponding to the mounting protrusions 420 .

The mounting protrusion 420 may be provided with a pair of fastening hooks 421 spaced apart from each other by a predetermined distance, and each fastening hook may be inserted into the first through-hole to be latched and fixed to a portion of the first through-hole.

By the structure as described above, the fixing force of the pad and the stent and the rail fixed thereto can be further improved.

The present invention also provides a manufacturing method for manufacturing a roof rack.

For example, the roof rack manufacturing method relates to the above-described roof rack, that is, a method for bonding a rail and a stent. Therefore, the details of the roof rack manufacturing method to be described later may be equally applied to the contents described in the roof rack.

More specifically, in the method for manufacturing a roof rack according to an embodiment of the present invention, the first and second sidewalls and the upper member connecting the first and second sidewalls respectively extend along the longitudinal direction by injection molding the rail step; It is joined to a predetermined area of the rail and provided to be coupled with a mounting bolt for connection to the vehicle body, and has a first surface facing the upper member of the rail and a second surface opposite to the first surface, the length direction of the rail a base portion extending along the base; A second step of injection molding a stent comprising a; and a third step of attaching the injection-molded rail and the stent to a welding machine, respectively, to apply pressure and vibration to the rail and the stent, and bonding the rail and the stent by vibration welding; includes

In particular, in the third step, the joint portions provided to be respectively joined to at least partial regions of the longitudinal cross-sections of the first and second sidewalls along the longitudinal direction at both edges of the first surface of the base portion, the longitudinal cross-sections of the first and second sidewalls each of which is bonded to at least a partial region of

That is, by the third step, at least a partial region of the longitudinal cross-section of the first and second sidewalls of the rail and the junction of the stent are joined, and the predetermined area of the inner peripheral surface of the upper member of the rail and the first to fourth joining ribs of the stent are joined. can

10: roof rack
100: rail
200: stent
300: mounting bolt
400: pad

Claims (9)

a rail having a first sidewall and a second sidewall spaced apart by a predetermined distance, and an upper member connecting the first sidewall and the second sidewall, each extending in a longitudinal direction; and
a stent fixed to the rail and having a base portion extending along the longitudinal direction of the rail; including,
The first sidewall and the second sidewall have an asymmetric structure with respect to the center line in the width direction of the base part,
When the upper member is defined as a region between the first extension line extending along the inner circumferential surface of the first sidewall and the second extension line extending along the inner circumferential surface of the second sidewall,
A cross-sectional area of the first sidewall to the second sidewall is provided to have a ratio of 1:0.6 to 1:1,
The first sidewall includes a first region in which at least a portion of the region increases and decreases in thickness from the upper member side toward the base portion and a second region that extends from the first region. delete The method of claim 1,
The second area is provided to be bent at a predetermined angle toward the outside with respect to the first extension line, the roof rack. 4. The method of claim 3,
The second region of the first sidewall includes a first side portion having a predetermined first thickness and protruding toward the base portion along the outer circumferential surface of the second region with a second thickness smaller than the first thickness at the end of the second region , roof rack. The method of claim 1,
The second sidewall, at least a portion of the region has a third thickness, the roof rack comprising a second side formed to protrude toward the base portion along the outer circumferential surface of the second sidewall to a fourth thickness smaller than the third thickness. The method of claim 1,
The maximum width of the cross-section of the first sidewall is provided to be larger than the maximum width of the cross-section of the second sidewall, the roof rack. The method of claim 1,
The base portion has a first surface facing the upper member and a second surface opposite to the first surface,
The roof rack further includes a pad extending in a longitudinal direction so that the first and second side portions and the second surface of the base portion do not come into contact with the roof panel of the vehicle body. The method of claim 1,
It is located at a predetermined distance apart along the longitudinal direction of the pad, and includes a mounting protrusion protruding toward the second surface of the base part,
The base portion includes a first through hole through which the mounting protrusion is inserted, the roof rack. 9. The method of claim 8,
The mounting protrusion is provided such that a pair of fastening hooks are provided at a predetermined distance apart, and each fastening hook is inserted into the first through-hole to be latched and fixed to a portion of the first through-hole.

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