JP2023099963A - Vehicular resin roof attachment structure and vehicular roof structure - Google Patents

Abstract

To provide a vehicular resin roof attachment structure which can maintain a good connection state between a vehicle body and a resin roof regardless of temperature change.SOLUTION: A vehicular resin roof attachment structure includes: a bracket 26 provided at a vehicular upper skeleton member 20 and formed with a bracket side through hole 110A; a resin main roof 50 in which a roof side through hole 80A is formed at a peripheral edge part 52A; and a shoulder bolt 90 including a shaft part 92 formed with a thread, a fastening head 94 formed at an upper side of the shaft part 92, and a flange part 96 formed at an upper side of the fastening head 94 and having a diameter larger than that of the roof side through hole 80A, the shoulder bolt 90 fastened in a state that a seat surface 94A of the fastening head 94 is in contact with an upper surface of a peripheral edge part 110B of the bracket side through hole 110A and having a first gap R1 formed between an outer peripheral surface 94B of the fastening head 94 and a hole wall of the roof side through hole 80A and a second gap R2 formed between a lower surface 96A of the flange part 96 and an upper surface of a peripheral edge part 80B of the roof side through hole 80A.SELECTED DRAWING: Figure 5

Description

The present invention relates to a vehicle resin roof mounting structure and a vehicle roof structure.

Patent Literature 1 below discloses a vehicle interior ceiling material including a foam molded body for the purpose of reducing noise and improving heat insulation in a vehicle interior. In this ceiling interior material, a foamed molding is integrally formed on the exterior side of a panel-like base material facing the interior of the vehicle.

JP 2011-225150 A

The ceiling interior material of Patent Document 1 is assembled so as to be pressed against a general metal roof panel attached to the vehicle from the inside of the passenger compartment. Therefore, there is room for improvement in assemblability.

Therefore, in order to improve the assemblability, it is conceivable to make the roof panel resin and integrally mold the resin roof panel and the foamed molding. By adhering the integrally molded resin roof to the upper portion of the vehicle body from the outside of the vehicle, the assembly efficiency is improved.

Here, it is conceivable to further strengthen the connection between the vehicle body and the plastic roof by applying another structure in addition to adhesion. However, since the resin roof easily expands and contracts due to temperature changes, if the resin roof is firmly fixed to the vehicle body, the dimensional change of the resin roof due to this expansion and contraction cannot be absorbed. Therefore, there is a demand for a structure that can maintain a good connection state between the vehicle body and the resin roof regardless of temperature changes.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle roof attachment structure and a vehicle roof structure that can maintain a good connection state between a vehicle body and a resin roof regardless of temperature changes.

According to a first aspect of the present invention, there is provided a vehicle resin roof mounting structure according to a first aspect of the present invention. A roof-side through-hole having a larger diameter than the bracket-side through-hole and penetrating in the plate thickness direction is formed in the peripheral edge portion, and the peripheral edge portion of the bracket-side through-hole and the peripheral edge portion of the roof-side through-hole are vertically aligned. an adhesive for adhering the lower surface of the main roof to the base material of the upper part of the vehicle body including the upper vehicle frame member; A shaft portion on which a screw is formed, a fastening head formed on the upper side of the shaft portion and having a smaller diameter than the roof-side through hole, and a fastening head formed on the upper side of the fastening head and having a diameter larger than the roof-side through hole. a flange portion, wherein the shaft portion is inserted through the bracket-side through hole and is fastened in a state in which the bearing surface of the fastening head portion is in contact with the upper surface of the peripheral edge portion of the bracket-side through hole; A first gap is provided between the outer peripheral surface of the head portion and the hole wall of the roof-side through hole, and a second gap is provided between the lower surface of the flange portion and the upper surface of the peripheral portion of the roof-side through hole. and a stepped bolt.

According to the first aspect of the present invention, a main roof made of resin (resin roof) is arranged on the upper side of the vehicle upper frame member arranged on the upper part of the vehicle body. Here, the lower surface of the main roof is adhered to the base material of the upper part of the vehicle body including the upper frame member of the vehicle with an adhesive.

A bracket is provided on the vehicle upper frame member. The bracket is formed with a bracket-side through hole penetrating in the plate thickness direction. On the other hand, a roof-side through-hole having a diameter larger than that of the bracket-side through-hole and penetrating in the plate thickness direction is formed in the peripheral end portion of the main roof. The main roof is arranged above the vehicle upper frame member at a position where the peripheral edge portion of the bracket-side through hole and the peripheral edge portion of the roof-side through hole overlap in the vertical direction.

Here, a stepped bolt is fastened to the bracket. The stepped bolt has a threaded shank and a fastening head formed on the upper side of the shank. It is fastened while being in contact with the upper surface of the peripheral portion of the side through hole.

The stepped bolt further has a flange portion with a diameter larger than that of the roof-side through-hole on the upper side of the fastening head. As a result, even if the adhesive that adheres the main roof to the base material on the upper part of the vehicle body peels off, the flange of the stepped bolt hooks the periphery of the roof-side through-hole, preventing the main roof from scattering. The connection state to the vehicle body is maintained.

The fastening head has a diameter smaller than that of the roof-side through hole, and a horizontal first gap is provided between the outer peripheral surface of the fastening head and the hole wall of the roof-side through hole. Further, a second vertical gap is provided between the lower surface of the flange portion and the upper surface of the peripheral portion of the roof-side through hole. That is, the shoulder bolt does not fasten the main roof, and the peripheral edge of the main roof can slide relative to the bracket. Therefore, even when the main roof expands and contracts due to temperature changes, the roof-side through-hole absorbs the dimensional change of the main roof while maintaining the connecting state of the main roof by the flange portion of the stepped bolt.

According to a second aspect of the present invention, there is provided a vehicle resin roof mounting structure according to the first aspect of the invention, wherein the first gap and the second gap are filled with a sealer.

According to the second aspect of the present invention, the sealer is filled in the first gap between the outer peripheral surface of the fastening head and the hole wall of the roof-side through hole. The sealer is also filled in the second gap between the lower surface of the flange portion and the upper surface of the peripheral portion of the roof-side through hole. This closes the first gap and the second gap. Therefore, water is prevented from entering the vehicle interior through the roof-side through hole. At this time, the expansion and contraction of the main roof is not hindered due to the elasticity of the sealer.

According to a third aspect of the present invention, there is provided a vehicle resin roof mounting structure according to the first or second aspect of the present invention, wherein a pair of main roofs are provided in the front-rear direction of the vehicle.

According to the third aspect of the present invention, two main roofs are provided in the front-rear direction. As a result, compared to the case where the main roof of the vehicle is constructed with only one sheet, the longitudinal dimension of each sheet is shorter, so the longitudinal dimensional change of the main roof due to changes in temperature can be kept small. can. Therefore, since the small roof-side through-hole can absorb the dimensional change of the main roof, the strength and rigidity of the main roof can be improved. Moreover, since the main roof can be connected to the vehicle body by means of the stepped bolts having the small flange portions, it is possible to improve the appearance design of the portion of the vehicle body to which the stepped bolts are attached.

Claim 4 of the present invention provides a vehicle resin roof mounting structure according to any one of Claims 1 to 3, wherein the main roof includes the peripheral end portion. and an inner layer made of foamed resin provided below a predetermined region of the outer layer excluding the peripheral end portion.

According to the fourth aspect of the present invention, the inner layer made of foamed resin is provided on the lower side of the outer layer, that is, on the interior side of the vehicle. Therefore, the noise in the passenger compartment is reduced and the thermal insulation of the passenger compartment is improved as compared with the case where the main roof is composed of a single-layer resin panel.

According to a fifth aspect of the present invention, there is provided a vehicle resin roof mounting structure according to the fourth aspect of the invention, wherein the outer edge of the outer layer is covered with a sealer.

According to the fifth aspect of the present invention, water is prevented from entering the passenger compartment from between the outer edge of the outer layer and the upper portion of the vehicle body.

According to a sixth aspect of the present invention, there is provided a vehicle resin roof mounting structure according to the fourth or fifth aspect, wherein the stepped bolts are attached to at least four corners of the outer layer. ing.

According to the sixth aspect of the present invention, the four corners of the outer layer of the main roof are connected to the brackets by stepped bolts. Therefore, even if the adhesive peels off, the connection between the main roof and the vehicle body is maintained at least at the four corners of the main roof. As a result, for example, even if the adhesive peels off while the vehicle is running, the main roof can be prevented from being lifted up by the running wind, so the scattering of the main roof can be reliably prevented.

According to claim 7, there is provided a vehicle roof structure according to the present invention, which has the resin roof mounting structure for a vehicle according to any one of claims 4 to 6, and is formed of a resin harder than the outer layer. and provided between the main roof and the front windshield and between the main roof and the rear windshield in a plan view to hold the main roof, the front windshield and the rear windshield, respectively. and a pair of sub-roofs.

According to the seventh aspect of the present invention, the front subroof holds the main roof and the front windshield provided on the front side of the vehicle. Also, the rear subroof holds the main roof and the rear windshield provided on the rear side of the vehicle. These sub-roofs are made of resin harder than the outer layer of the main roof. Therefore, the strength and rigidity required to hold each windshield and the main roof can be ensured while suppressing the mass of the vehicle as compared with a metal roof.

As described above, the resin roof mounting structure for a vehicle according to the present invention has the excellent effect of being able to maintain a good connection state between the vehicle body and the roof regardless of temperature changes. .

The resin roof mounting structure for a vehicle according to the second aspect of the present invention has the excellent effect of being able to absorb dimensional changes in the main roof and ensure the waterproofness of the roof-side through-hole.

The resin roof mounting structure for a vehicle according to claim 3 of the present invention has an excellent effect of improving the strength and rigidity of the main roof and improving the appearance design of the portion where the bolt is attached. have.

The resin roof mounting structure for a vehicle according to the present invention described in claim 4 has the excellent effect of reducing noise in the vehicle interior and improving the heat insulation of the vehicle interior.

The resin roof mounting structure for a vehicle according to the fifth aspect of the present invention has an excellent effect that it is possible to ensure water stoppage at the outer edge of the outer layer.

The resin roof mounting structure for a vehicle according to the sixth aspect of the present invention has an excellent effect of being able to maintain a better connection state between the vehicle body and the roof.

The vehicle roof structure according to the present invention described in claim 7 has the excellent effect of being able to secure necessary strength and rigidity while suppressing the mass of the vehicle.

1 is a perspective view showing an upper portion of a vehicle body to which a resin roof mounting structure for a vehicle according to this embodiment is applied; FIG. FIG. 2 is a cross-sectional view taken along line XX of the vehicle body upper portion shown in FIG. 1; FIG. 3(A) is a diagram showing fastening positions of bolts in the upper portion of the vehicle body shown in FIG. FIG. 3(B) is a plan view showing an enlarged portion A of FIG. 3(A). FIG. 4 is a cross-sectional view taken along the line YY of FIG. 3(B); 5 is an enlarged view of a main portion of FIG. 4; FIG.

1 to 5, a resin roof mounting structure for a vehicle according to an embodiment of the present invention and a vehicle roof structure including the resin roof mounting structure for a vehicle will be described below. An arrow UP shown in each drawing indicates the upper side of the vehicle, an arrow FR indicates the front side of the vehicle, and an arrow LH and an arrow RH indicate the left side and the right side of the vehicle. In the following explanations, when front-rear, up-down, left-right, and inside/outside directions are used unless otherwise specified, front-rear in the vehicle front-rear direction, up/down in the vertical direction of the vehicle, left/right in the left-right direction of the vehicle (vehicle width direction), and inside/outside of the passenger compartment. shall be indicated respectively.

First, a vehicle roof structure will be described with reference to FIGS. 1 and 2, and then a resin roof mounting structure for a vehicle will be described in detail with reference to FIGS. 2 to 5. FIG.

[Vehicle roof structure]
FIG. 1 shows a vehicle body upper portion 12 of a vehicle 10 to which a vehicle resin roof mounting structure according to the present embodiment is applied. Metal roof side rails 20 as vehicle upper frame members extend in the front-rear direction at both vehicle width direction end portions of the vehicle body upper portion 12 . Above each roof side rail 20, an upper portion of a side member outer panel 14 (hereinafter referred to as a "cymen outer 14") is arranged.

Three metal roof reinforcements 30 extending in the width direction of the vehicle are provided between the pair of left and right roof side rails 20 at intervals in the front-rear direction. Hereinafter, the front roof reinforcement 30 will be referred to as "front roof RF 30F", the center roof reinforcement 30 will be referred to as "central roof RF 30C", and the rear roof reinforcement 30 will be referred to as "rear roof RF 30B". Each roof reinforcement 30 is welded to the roof side rail 20 (see FIG. 4).

Here, a sub-roof 40 having a substantially rectangular flat plate shape is provided in a portion surrounded by the front roof RF 30F and the pair of left and right roof side rails 20 in plan view. A sub-roof 40 is also provided at a portion surrounded by the rear roof RF 30B and the pair of left and right roof side rails 20. As shown in FIG.

The front sub-roof 40 holds the upper end of a front windshield (not shown) provided on the front side of the vehicle. On the other hand, the rear subroof 40 holds the upper end of a rear windshield (not shown) provided on the rear side of the vehicle. The roof side rails 20, the roof reinforcement 30, the cymen outer 14, and the sub-roof 40 described above correspond to the "base material" in the present invention.

Further, a pair of front and rear main roofs 50 are provided between the pair of front and rear sub-roofs 40 in plan view. The pair of main roofs 50 are attached to the base material of the vehicle body upper portion 12 by a vehicle resin roof attachment structure, which will be described in detail later. The vehicle roof structure according to this embodiment includes the main roof 50 and the sub-roof 40 .

The front main roof 50 is provided in a region surrounded by the front roof RF 30F, the central roof RF 30C, and the pair of left and right roof side rails 20 in plan view. On the other hand, the rear main roof 50 is provided in a region surrounded by the rear roof RF 30B, the central roof RF 30C, and the pair of left and right roof side rails 20 in plan view.

FIG. 2 shows a cross-sectional view of the upper vehicle body 12 shown in FIG. 1 taken along line XX and viewed from the left. As shown in FIG. 2, the front roof RF 30F includes a substantially hat-shaped under reinforcement 32F that protrudes downward when viewed in cross section from the side of the vehicle. The front roof RF 30F further includes an upper reinforcement 36F whose front side is a substantially rectangular bulging portion 37 that bulges upward in a cross-sectional view viewed from the side of the vehicle. A flange portion 34F formed at the front end portion and the rear end portion of the under reinforcement 32F and a flange portion 38F formed at the front end portion and the rear end portion of the upper reinforcement 36F are joined to each other by spot welding or the like. By doing so, it is configured to have a closed cross-sectional shape.

In addition, the central roof RF 30C includes an under reinforcement 32C having a substantially hat-shaped shape that is convex downward when viewed from the side of the vehicle, and a substantially hat shape that is convex upward when viewed from the side of the vehicle. and a mold-shaped upper reinforcement 36C. The central roof RF 30C has flange portions 34C formed at the front and rear ends of the under reinforcement 32C and flange portions 38C formed at the front and rear ends of the upper reinforcement 36C, which are spot-welded. etc., to form a closed cross-sectional shape. The front side of the upper reinforcement 36C, excluding the flange portion 38C, is integrally formed with a concave portion 39 that is concave downward in a substantially rectangular shape in a cross-sectional view viewed from the side of the vehicle.

In addition, at the rear end of the front subroof 40, a stepped portion 42 bent downward in a substantially L-shape in a cross-sectional view viewed from the side of the vehicle, A substantially hat-shaped support portion 44 that protrudes downward in a cross-sectional view is formed. The lower surface 44D of the support portion 44 is adhered to the upper surface 37U of the bulging portion 37 in the upper reinforcement 36F of the front roof RF 30F via the first adhesive G1. That is, the rear end of the sub-roof 40 is supported by the front roof RF30F.

Here, the main roof 50 on the front side and the main roof 50 on the rear side are integrated with an outer layer 52 that constitutes the roof panel of the vehicle 10 together with the sub-roof 40 and the lower surface of a predetermined region of the outer layer 52 excluding the peripheral end portion 52A. and an inner layer 56 which are bonded together. Each outer layer 52 is formed in a substantially rectangular shape whose longitudinal direction is the front-rear direction in plan view.

The outer layer 52 is made of a weather-resistant resin material such as acrylonitrile-ethylene-propylene-diene-styrene (AES), and has a thickness of 1.0 mm to 2.5 mm. On the other hand, the inner layer 56 is made of a foamed molding (for example, foamed urethane foam) and formed thicker than the outer layer 52 . Specifically, the plate thickness of the inner layer 56 is set to 10 mm or more, although it varies depending on the position in the front-rear direction. As described above, the main roof 50 includes the outer layer 52 and the inner layer 56 made of resin, and is therefore also referred to as a "resin roof".

Further, the sub-roof 40 described above is formed of a resin material having a high strength and rigidity such as glass fiber reinforced plastic (GFRP) as a resin material harder than the outer layer 52, and the plate thickness thereof is 2.0 mm. That's it.

[Resin roof mounting structure for vehicles]
(Second adhesive G2 and third adhesive G3)

As shown in FIG. 4 , a stepped portion 16 is formed on the inner side of the cymen outer 14 in the vehicle width direction, the stepped portion 16 being bent downward in a substantially L shape in a cross-sectional view viewed from the rear side of the vehicle. Further, a support portion 18 bent downward in a substantially L-shape is integrally formed at the vehicle width direction inner end portion of the stepped portion 16 .

As shown in FIGS. 2 and 4, a second adhesive G2 is provided in an annular shape on the lower surface of the peripheral edge portion 52A of the outer layer 52 of the main roof 50. As shown in FIGS. The portion of the main roof 50 where the second adhesive G2 is applied serves as an outer layer adhesion portion 54 .

As shown in FIG. 2, the front outer layer bonding portion 54 is bonded to the upper surface 44U of the support portion 44 of the front sub-roof 40 with the second adhesive G2. In addition, the rear outer layer adhesion portion 54 is adhered to the upper surface 39U of the recess 39 of the upper reinforcement 36C in the central roof RF 30C with the second adhesive G2. Further, the right outer layer adhesion portion 54 is adhered to the upper surface 18U of the support portion 18 of the right cymen outer 14 with the second adhesive G2 (see FIG. 4). The left outer layer bonding portion 54 is the same as the right outer layer bonding portion 54, and thus the description thereof is omitted.

A third adhesive G3 is annularly provided on the lower surface of the inner layer 56 . The portion of the main roof 50 where the third adhesive G3 is applied serves as an inner layer adhesion portion 58 .

The front inner layer adhesion portion 58 is adhered to the flange portion 38F formed at the rear end portion of the upper reinforcement 36F in the front roof RF 30F with the third adhesive G3. In addition, the rear inner layer adhesion portion 58 is adhered to the flange portion 38C formed at the front end portion of the upper reinforcement 36C in the central roof RF 30C with the third adhesive G3. Further, the left and right inner layer adhesion portions 58 are adhered to the vehicle width direction inner flange portion 28 (see FIG. 1) of the roof side rail 20 with a third adhesive G3.

(Guide pin bracket 60)
On the lower surface of the inner layer 56, guide pin brackets 60 are provided at the front and rear ends of the center portion in the width direction of the vehicle. Each bracket 60 includes a substantially rectangular flat plate-shaped base portion 62, a cylindrical boss portion 64 integrally formed in the center of the lower surface of the base portion 62, and the lower surface of the base portion 62 and the outer peripheral surface of the boss portion 64 integrally. and a plurality of flat plate-like ribs 68 connected to each other. Each bracket 60 is attached to the lower surface of the inner layer 56 by bonding the upper surface of the base portion 62 to the lower surface of the inner layer 56 with an adhesive material such as double-sided tape T or the like. Boss portion 64 is reinforced by a plurality of ribs 68 .

Each guide pin bracket 60 has a female threaded portion 66 formed on the inner peripheral surface of a boss portion 64, and is configured to be able to be screwed with a substantially cylindrical guide pin 70. As shown in FIG. The guide pin 70 includes a main body portion 72 having a predetermined length whose axial direction is the vertical direction, and a male threaded portion 76 formed at the upper end portion of the main body portion 72 . The male threaded portion 76 of the guide pin 70 is screwed into the female threaded portion 66 of the guide pin bracket 60 . That is, the guide pin 70 is detachably suspended from the lower surface of the inner layer 56 via the guide pin bracket 60 .

A hole portion 33 penetrating vertically is formed in each of the vehicle width direction central portions of the upper reinforcement 36F and the lower reinforcement 32F of the front roof RF 30F. A hole 35 penetrating in the vertical direction is formed in the central portion in the vehicle width direction of the flange portions 34C and 38C joined to each other at the front end portion of the central roof RF 30C. The main body portion 72 of the guide pin 70 penetrates through the holes 33 and 35 in a state in which the outer layer adhesion portion 54 and the inner layer adhesion portion 58 are respectively adhered, and extends downward from the lower surfaces of the under reinforcements 32F and 32C. It is considered to be a protruding length.

The hole portion 33 formed in the front roof RF 30F is formed as a substantially elliptical long hole elongated in the front-rear direction in order to absorb the positional error in the front-rear direction of the guide pin bracket 60 attached to the lower surface of the inner layer 56. there is The inner diameter of the hole portion 33 in the vehicle width direction is substantially the same as the outer diameter of the body portion 72 of the guide pin 70 . Further, the hole portion 35 formed in the central roof RF 30C is a circular fitting hole having an inner diameter substantially the same as the outer diameter of the body portion 72 of the guide pin 70 .

Therefore, the rear guide pin 70 is inserted into the hole 35 from above with almost no gap, and the front guide pin 70 is inserted into the hole 33 from above with a gap in the front-rear direction. are positioned relative to the sub-roof 40 and each roof RF 30F, 30C.

The main roof 50 has the guide pins 70 inserted into the holes 33 and 35 and positioned, the outer layer adhesion portion 54 is adhered with the second adhesive G2, and the inner layer adhesion portion 54 is adhered with the third adhesive G3. A layer bonding portion 58 is adapted to be bonded. Each guide pin 70 is detached from each guide pin bracket 60 after the outer layer bonding portion 54 and the inner layer bonding portion 58 are respectively bonded.

(First sealer S1)
In addition, the outer edge 52B of the peripheral end portion 52A of the outer layer 52 includes a portion of the upper surface of the stepped portion 42 of the sub-roof 40, a portion of the upper surface of the upper reinforcement 36C of the central roof RF 30C, and the stepped portion 16 of the cymen outer 14 (Fig. 4) together with a part of the upper surface is covered by a soft weather resistant first sealer S1. The first sealer S1 is a wet sealing material, and is annularly provided along the outer edge 52B.

(corner 80)
As shown in FIG. 3A, stepped bolts 90 are attached to corner portions 80 positioned at four corners in a plan view of the pair of front and rear main roofs 50 . Each corner 80 of the main roof 50 is formed at the peripheral edge 52A of the outer layer 52 (see FIG. 4).

FIG. 3(B) shows an enlarged plan view of the portion A of FIG. 3(A) viewed from above. As shown in FIG. 3(B), in the rear main roof 50, the stepped bolt 90 attached to the corner 80 of the right and rear ends is located on the inner side (left side) of the cymen outer 14 in the vehicle width direction. Moreover, it is provided on the front side of the sub-roof 40 on the rear side. The stepped bolt 90 attached to the other corner portion 80 is the same as the stepped bolt 90 attached to the corner portion 80 at the right and rear end portions, and thus description thereof is omitted.

(Fastening bracket 26)
FIG. 4 shows a cross-sectional view of a plane cut along the line YY in FIG. 3(B) viewed from the rear side. As shown in FIG. 4 , the roof side rail 20 includes a substantially hat-shaped under reinforcement 22 that protrudes downward when viewed from the rear of the vehicle in cross section, and an under reinforcement 22 that protrudes downward when viewed from the rear of the vehicle. A substantially hat-shaped upper reinforcement 24 that protrudes toward the side is provided. The roof side rail 20 is configured to have a closed cross-sectional shape by joining flange portions 22A formed at both ends of the under reinforcement 22 in the vehicle width direction to the upper reinforcement 24 by spot welding or the like. The upper reinforcement 24 has a substantially rectangular concave portion 24</b>A bent downward in a cross-sectional view viewed from the vehicle rear side, below the support portion 18 of the cymene outer 14 .

A fastening bracket 26 is provided on the upper surface of the upper reinforcement 24 at a position corresponding to the corner 80 of the main roof 50 . The fastening bracket 26 has a substantially hat-like shape with a substantially U-shaped projecting portion 100 that protrudes upward when viewed in cross section from the rear side of the vehicle. The protruding portion 100 includes an inner wall portion 102 extending substantially vertically on the inner side in the vehicle width direction, and an outer wall portion extending substantially vertically on the outer side in the vehicle width direction such that the lower side inclines outward in the vehicle width direction. 104.

The fastening bracket 26 further includes an inner flange portion 106 extending inward in the vehicle width direction from the lower end portion of the inner wall portion 102, and an inner flange portion 106 extending outward in the vehicle width direction from the lower end portion of the outer wall portion 104. and an outer flange portion 108 . Outer flange portion 108 is longer in the vehicle width direction than inner flange portion 106 and is formed below inner flange portion 106 .

The inner flange portion 106 and the outer flange portion 108 are each welded to the upper surface of the upper reinforcement 24 of the roof side rail 20 . The lower surface of the outer flange portion 108 is welded to the upper surface of the concave portion 24A of the upper reinforcement 24 .

In addition, in the projecting portion 100 of the fastening bracket 26 , the inner wall portion 102 and the outer wall portion 104 are connected in the vehicle width direction by the fastening support portion 110 . A corner portion 80 of the peripheral edge portion 52A of the outer layer 52 of the main roof 50 is arranged over the fastening support portion 110 of the fastening bracket 26 .

(Roof side through hole 80A and bracket side through hole 110A)
As shown in FIG. 5, the fastening support portion 110 of the fastening bracket 26 is formed with a bracket-side through hole 110A penetrating in the plate thickness direction (substantially in the vertical direction) and having a circular shape in plan view. A corner portion 80 of the main roof 50 is formed with a roof side through hole 80A having a larger diameter than the bracket side through hole 110A penetrating in the plate thickness direction (substantially in the vertical direction) and having a circular shape in plan view. Further, in the upper reinforcement 24 of the roof side rail 20, a circular upper in plan view having a larger diameter than the bracket-side through-hole 110A and a smaller diameter than the roof-side through-hole 80A is provided inside the recess 24A in the vehicle width direction. A reinforcement-side through hole 24B is formed.

The bracket-side through-hole 110A, the roof-side through-hole 80A, and the upper reinforcement-side through-hole 24B are formed at corresponding positions in plan view. In other words, the main roof 50 is arranged at a position where the peripheral edge portion 110B of the bracket side through hole 110A and the peripheral edge portion 80B of the roof side through hole 80A overlap in the vertical direction.

(Stepped bolt 90)
In the fastening support portion 110 of the fastening bracket 26, a weld nut 120 having a female thread formed on the inner peripheral surface is welded to the lower surface of the peripheral edge portion 110B of the bracket-side through hole 110A. On the other hand, the stepped bolt 90 described above has a shaft portion 92 having a male thread formed on the outer peripheral surface thereof. The stepped bolt 90 also has a cylindrical fastening head 94 on the upper side of the shaft portion 92 . The shoulder 92 of the stepped bolt 90 is inserted into the bracket-side through-hole 110A and screwed into the weld nut 120, and the bearing surface 94A of the fastening head 94 is placed on the upper surface of the peripheral edge 110B of the bracket-side through-hole 110A. It is fastened to the fastening bracket 26 by coming into contact with it. The fastening head 94 has a diameter smaller than that of the roof-side through hole 80A, and a horizontal first gap R1 is formed between the outer peripheral surface 94B of the fastening head 94 and the hole wall of the roof-side through hole 80A. is provided.

Further, the stepped bolt 90 has a bolt flange portion 96 as a disc-shaped flange portion having a larger diameter than the fastening head portion 94 above the fastening head portion 94 . This bolt flange portion 96 has a larger diameter than the diameter of the roof-side through hole 80A in consideration of manufacturing variations and thermal elongation. A second vertical clearance R2 is provided between the lower surface 96A of the bolt flange portion 96 and the upper surface of the peripheral portion 80B of the roof-side through hole 80A.

The stepped bolt 90 further includes a substantially hexagonal prism-shaped tool engaging head 98 having a diameter smaller than that of the bolt flange portion 96 on the upper side of the bolt flange portion 96 . The stepped bolt 90 is fastened to the fastening bracket 26 by rotating the tool engaging head 98 with a tool such as a spanner. The shape of the tool engaging head 98 is not limited to the substantially hexagonal prism shape, and may be any shape as long as it can be engaged with a tool to fasten the stepped bolt 90 .

(Second sealer S2)
The hole wall of the roof-side through-hole 80A and the upper surface of the peripheral edge portion 80B include a part of the upper surface of the peripheral edge portion 110B of the bracket-side through-hole 110A, the outer peripheral surface 94B of the fastening head 94, and the lower surface 96A of the bolt flange portion 96. , and a part of the outer peripheral surface 96B of the bolt flange portion 96 are covered with a weather-resistant soft second sealer S2. That is, the first gap R1 and the second gap R2 are filled with the second sealer S2, which is a wet sealing material.

(Action and effect of the present embodiment)
Next, the operation and effects of this embodiment will be described.

According to the vehicle resin roof mounting structure according to the present embodiment, the main roof 50 made of resin is arranged above the roof side rails 20 arranged on the upper part 12 of the vehicle body. The outer layer 52 of the main roof 50 is adhered to the cymen outer 14 of the upper vehicle body 12, the sub-roof 40, and the roof reinforcement 30 via the second adhesive G2. Also, the inner layer 56 of the main roof 50 is adhered to the roof side rails 20 and the roof reinforcement 30 via the third adhesive G3.

A fastening bracket 26 is provided on the roof side rail 20 . The fastening support portion 110 of the fastening bracket 26 is formed with a bracket-side through hole 110A penetrating vertically. On the other hand, the peripheral end portion 52A of the main roof 50 is formed with a roof-side through-hole 80A having a larger diameter than the bracket-side through-hole 110A and penetrating vertically. The main roof 50 is arranged above the roof side rail 20 at a position where the peripheral edge portion 110B of the bracket side through hole 110A and the peripheral edge portion 80B of the roof side through hole 80A overlap in the vertical direction.

Here, a stepped bolt 90 is fastened to the fastening bracket 26 . The stepped bolt 90 includes a shaft portion 92 having a male thread formed on the outer peripheral surface thereof, and a fastening head portion 94 formed on the upper side of the shaft portion 92 . The stepped bolt 90 is fastened with the shaft portion 92 inserted through the bracket-side through hole 110A and the bearing surface 94A of the fastening head 94 in contact with the upper surface of the peripheral edge portion 110B of the bracket-side through hole 110A. .

The stepped bolt 90 further includes a bolt flange portion 96 above the fastening head portion 94 and having a larger diameter than the roof-side through hole 80A. As a result, even if the second adhesive G2 and the third adhesive G3 are peeled off, the peripheral edge portion 80B of the roof-side through hole 80A of the main roof 50 is hooked to the bolt flange portion 96 of the stepped bolt 90. , the main roof 50 is kept connected to the vehicle body without scattering. Therefore, a good connection state between the vehicle body and the main roof 50 can be maintained regardless of temperature changes.

The fastening head 94 has a diameter smaller than that of the roof-side through hole 80A, and a horizontal first gap R1 is formed between the outer peripheral surface 94B of the fastening head 94 and the hole wall of the roof-side through hole 80A. is provided. Further, a second gap R2 in the vertical direction is provided between the lower surface 96A of the bolt flange portion 96 and the upper surface of the peripheral edge portion 80B of the roof-side through hole 80A. That is, the stepped bolt 90 does not fasten the main roof 50, and the peripheral edge portion 52A of the main roof 50 can slide with respect to the fastening bracket 26. As shown in FIG. Therefore, even when the main roof 50 expands and contracts due to temperature changes, the bolt flange portion 96 of the stepped bolt 90 maintains the connection state of the main roof 50, and the roof-side through-hole 80A allows the main roof 50 to move. Dimensional changes are absorbed.

A first gap R1 between the outer peripheral surface 94B of the fastening head 94 and the hole wall of the roof-side through hole 80A is filled with a soft second sealer S2 having weather resistance. The second sealer S2 is also filled in the second gap R2 between the lower surface 96A of the bolt flange portion 96 and the upper surface of the peripheral portion 80B of the roof-side through hole 80A. That is, the first gap R1 and the second gap R2 are closed by the second sealer S2. Therefore, water is prevented from entering the interior of the vehicle 10 through the roof-side through hole 80A. At this time, the expansion and contraction of the main roof 50 are not hindered due to the elasticity of the second sealer S2. Therefore, it is possible to ensure waterproofness while absorbing the dimensional change of the main roof 50.

Further, a pair of main roofs 50 are provided in the longitudinal direction of the vehicle. As a result, compared to the case where the main roof of the vehicle 10 is composed of only one sheet, the dimension in the front-rear direction of each main roof becomes shorter, so that the main roof 50 expands and contracts in the front-rear direction due to temperature changes. can be kept small. Therefore, since the dimensional change of the main roof 50 can be absorbed by the small roof-side through-hole 80A, the strength and rigidity of the main roof 50 can be improved. In addition, since the main roof 50 can be connected to the vehicle body by the stepped bolt 90 having the small bolt flange portion 96, the appearance design of the portion of the vehicle body upper portion 12 to which the stepped bolt 90 is attached can be improved. can.

Furthermore, the main roof 50 includes an AES outer layer 52 including a peripheral edge portion 52A, and an outer layer 52 provided below a predetermined region (inside the passenger compartment) of the outer layer 52 excluding the peripheral edge portion 52A. and an inner layer 56 made of expanded urethane foam. Therefore, the noise in the vehicle interior of the vehicle 10 is reduced and the heat insulation of the vehicle interior is improved as compared with the case where the main roof is configured with a single-layer resin panel.

In addition, the outer edge 52B of the peripheral end portion 52A of the outer layer 52 is part of the upper surface of the stepped portion 42 of the sub-roof 40, part of the upper surface of the upper reinforcement 36C of the central roof RF 30C, and part of the upper surfaces of the left and right cymen outers 14. It is covered with a weather-resistant soft first sealer S1 together with the part. As a result, it is possible to prevent water from entering the vehicle interior through the gap between the outer end 52B and the upper surface of the stepped portion 42 and the gap between the outer end 52B and the upper surface of the upper reinforcement 36C. That is, it is possible to ensure the waterproofness at the outer edge 52B of the outer layer 52 . At this time, due to the elasticity of the first sealer S1, the expansion and contraction of the main roof 50 are not hindered.

Furthermore, in the outer layer of the main roof 50 , the four corners 80 of the peripheral edge 52A are connected to the fastening brackets 26 by stepped bolts 90 . Therefore, even if the second adhesive and the third adhesive are peeled off, the connecting state between the main roof 50 and the vehicle body is maintained at the four corners of the main roof 50 . As a result, even if the second adhesive and the third adhesive are peeled off during running, for example, the main roof 50 can be prevented from being lifted up by the running wind, and the scattering of the main roof 50 can be reliably prevented. Therefore, the connection state between the vehicle body and the main roof 50 can be maintained even better.

Furthermore, according to the vehicle roof structure of this embodiment, the front sub-roof 40 is provided between the front main roof 50 and the front windshield (not shown). The front sub-roof 40 holds the upper end of a front windshield (not shown). The front outer layer bonding portion 54 of the front main roof 50 is bonded to the support portion 44 of the front sub-roof 40 with the second adhesive G2. That is, the front sub-roof 40 holds the front end of the front main roof 50 . On the other hand, a rear sub-roof 40 is provided between the rear main roof 50 and a rear windshield (not shown). The rear sub-roof 40 holds the upper end of the rear windshield (not shown) and the rear end of the rear main roof 50 . The subroof 40 is made of GFRP, which is harder than the outer layer 52 made of AES.

Therefore, according to the vehicle roof structure according to the present embodiment, the strength required to hold the front windshield, the rear windshield, and the main roof 50 while suppressing the mass of the vehicle 10 compared to a metal roof. and rigidity can be ensured.

The stepped bolt 90 also has a bolt flange portion 96 having a diameter larger than that of the substantially hexagonal columnar tool engaging head portion 98 . Therefore, when rotating the tool engaging head 98 using, for example, a spanner, the spanner can be easily adjusted to the height of the tool engaging head 98 . Moreover, compared to the case where the outer peripheral surface of the tool engaging head 98 is flush with the outer peripheral surface of the bolt flange portion 96, the weight of the stepped bolt 90 can be reduced.

[Supplementary explanation of the above embodiment]
In the above embodiment, the fastening bracket 26 is welded to the roof side rail 20 . The fastening bracket 26 is not limited to this, and may be provided on a vehicle upper frame member arranged on the vehicle body upper portion 12 , and may be welded to the roof reinforcement 30 , for example.

Further, in the above embodiment, the outer layer 52 of the main roof 50 is adhered to the cymen outer 14, the sub-roof 40 and the roof reinforcement 30, and the inner layer 56 is adhered to the roof side rails 20 and the roof reinforcement 30. explained as. The main roof 50 is not limited to this, as long as it is adhered to the base material of the upper part 12 of the vehicle body.

Furthermore, in the above-described embodiment, the first gap R1 and the second gap R2 are filled with the second sealer S2, but other configurations may be used to secure the waterproofness of the passenger compartment.

Furthermore, in the above embodiment, a pair of main roofs 50 are provided in the longitudinal direction of the vehicle, but the present invention is not limited to this.

In the above embodiment, the main roof 50 has been described as a two-layer resin roof including the outer layer 52 and the inner layer 56. However, the present invention is not limited to this, and a single-layer or three-layer or more resin roof may be used. good.

Furthermore, in the above-described embodiment, the outline end 52B of the outer layer 52 is covered with the first sealer S1, but the waterproofness of the passenger compartment may be ensured by other configurations.

Furthermore, in the above embodiment, the stepped bolts 90 are attached to the four corners 80 of the front main roof 50 and the four corners 80 of the rear main roof 50, respectively. The stepped bolt 90 may be attached to another position on the peripheral edge portion 52A of the main roof 50 without being limited to this. Moreover, five or more stepped bolts may be attached to each of the front and rear main roofs 50 .

In the above embodiment, the sub-roof 40 made of resin harder than the outer layer 52 is provided on the front side and the rear side of the main roof 50, respectively. A subroof may be provided.

Furthermore, in the above embodiment, the stepped bolt 90 is provided with the tool engaging head 98 having a diameter smaller than that of the bolt flange portion 96 on the upper side of the bolt flange portion 96 . Not limited to this, the outer peripheral surface of the tool engaging head may be flush with the outer peripheral surface of the bolt flange portion.

10 vehicle 12 vehicle body upper part 14 side member outer panel (base material)
20 Roof side rail (vehicle upper frame member) (base material)
26 fastening bracket (bracket)
30 Roof reinforcement (base material)
40 Sub-roof 50 Main roof 52 Outer layer 52A Peripheral end 52B Outer edge 56 Inner layer 80 Corner 80A Roof-side through-hole 80B Peripheral edge of roof-side through-hole 90 Stepped bolt 92 Shaft 94 Fastening head 94A Seat surface 94B Fastening Outer peripheral surface 96 of the head Bolt flange portion (flange portion)
96A Lower surface of bolt flange portion (lower surface of flange portion)
110A Bracket-side through-hole 110B Peripheral edge portion G2 of bracket-side through-hole Second adhesive (adhesive)
G3 third adhesive (adhesive)
R1 First gap R2 Second gap S1 First sealer (sealer)
S2 Second Sealer (Sealer)

Claims (7)

a bracket provided in a vehicle upper frame member arranged in the upper part of the vehicle body and formed with a bracket-side through hole penetrating in the plate thickness direction;
A roof-side through-hole having a larger diameter than the bracket-side through-hole and penetrating in the plate thickness direction is formed at the peripheral end portion, and the peripheral edge portion of the bracket-side through-hole and the peripheral edge portion of the roof-side through-hole are vertically aligned. a main roof made of resin disposed on the upper side of the vehicle upper frame member so as to overlap in a direction;
an adhesive for adhering the lower surface of the main roof to the base material of the upper part of the vehicle body including the upper frame member of the vehicle;
A shaft portion on which a screw is formed, a fastening head formed on the upper side of the shaft portion and having a smaller diameter than the roof-side through hole, and a fastening head formed on the upper side of the fastening head and having a diameter larger than the roof-side through hole. a flange portion, wherein the shaft portion is inserted through the bracket-side through hole and is fastened in a state in which the bearing surface of the fastening head portion is in contact with the upper surface of the peripheral edge portion of the bracket-side through hole; A first gap is provided between the outer peripheral surface of the head portion and the hole wall of the roof-side through hole, and a second gap is provided between the lower surface of the flange portion and the upper surface of the peripheral portion of the roof-side through hole. a stepped bolt having
A resin roof mounting structure for a vehicle. The first gap and the second gap are filled with a sealer,
The resin roof mounting structure for a vehicle according to claim 1. A pair of the main roofs are provided in the longitudinal direction of the vehicle,
The resin roof mounting structure for a vehicle according to claim 1 or 2. The main roof is
a resin outer layer configured to include the peripheral edge;
an inner layer made of foamed resin provided below a predetermined region of the outer layer excluding the peripheral edge;
comprising
The resin roof mounting structure for a vehicle according to any one of claims 1 to 3. An outer edge of the outer layer is covered with a sealer,
The resin roof mounting structure for a vehicle according to claim 4. The stepped bolts are respectively attached to at least four corners of the outer layer,
The resin roof mounting structure for a vehicle according to claim 4 or 5. Having the vehicle resin roof mounting structure according to any one of claims 4 to 6,
The main roof and the front windshield are formed of a resin harder than the outer layer and are provided between the main roof and the front windshield and between the main roof and the rear windshield in plan view, respectively. a pair of subroofs respectively holding the shield and the rear windshield;
A vehicle roof structure having a

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