JP2021062848A - Resin window structure - Google Patents

Abstract

To solve a problem that the visual quality of a periphery of a resin window is impaired by a gap needed to be provided between an end part of the resin panel and a body to absorb displacement in a surface direction, which is caused by thermal expansion and contraction of the resin panel, at a resin window structure provided at a roof of a vehicle.SOLUTION: A thickness of a resin panel 10 is reduced from an end part to a center part to provide a thin area. Reducing the thickness of the center part of the resin panel 10 causes the center part to deflect in a thickness direction to absorb thermal expansion and contraction and thereby reduce displacement of the end part in a surface direction. Thus, a gap between the end part of the resin panel 10 and a body is reduced to improve the visual quality.SELECTED DRAWING: Figure 3

Description

The present invention relates to a resin window structure. The resin window structure is used for vehicles such as automobiles.

In recent years, in order to reduce the weight of a vehicle, for example, a resin window having a resin panel instead of a steel plate or flat glass is used for a roof. The resin panel is disclosed in the following patent documents and the like. The resin roof panel disclosed in Patent Document 1 is provided with a groove-shaped fragile portion. This fragile portion enhances resistance to noise and vibration (NV performance) while allowing the roof panel to be deformed by thermal expansion.

In the resin roof panel of Patent Document 2, the lower surface of the outer peripheral portion is adhered to the roof side rail using a urethane adhesive. In the resin roof panel of Patent Document 3, a leaf spring is interposed at the fastening portion of the sunshade housing to be fastened to the indoor side. The leaf spring allows it to bulge upward during thermal expansion of the roof panel. The resin roof panel of Patent Document 4 has a thick portion on the peripheral edge portion. The inner peripheral side inclined surface of this thick portion is adhered to the roof side rail. As a result, the thick portion suppresses the deformation of the roof panel and suppresses the decrease in the torsional rigidity of the entire body.

Japanese Unexamined Patent Publication No. 2012-91747 Japanese Unexamined Patent Publication No. 2013-147160 Japanese Unexamined Patent Publication No. 2010-255813 Japanese Unexamined Patent Publication No. 2013-1245

However, since the resin panel is displaced in the surface direction due to thermal expansion, it is necessary to set a gap having a width required to avoid interference with adjacent members adjacent in the surface direction. If a gap having a required width is not secured, the resin panel may hit an adjacent member due to thermal expansion and deform the adjacent member. For example, when the adjacent member is a member used for project mapping, the image projected due to the deformation of the adjacent member is distorted. Therefore, the gap between the end portion of the resin panel and the adjacent member is set to be large. Large gaps spoil the appearance around the resin window.

Therefore, a structure that minimizes the gap between the resin panel and the member adjacent to the resin panel has been conventionally required.

According to one feature of the present disclosure, the resin window structure is disposed in the resin panel, a body having an opening closed by the resin panel, and a gap in the surface direction with respect to the resin panel. It has adjacent adjacent members. The resin panel has one end and the other end fastened to the body, a thin-walled region located between one end and the other end, a thin-walled region and one end, and a thin-walled region and the other end. It has a main body region that is thicker than the thin-walled region between them.

Therefore, the thin-walled region located in the central portion of the resin panel is thinner than the main body region on the end side. As a result, the displacement of the resin panel in the surface direction mainly due to thermal expansion is performed by bending the central portion upward or downward in the thickness direction. As a result, the displacement of the main body region and the end portion in the surface direction can be reduced. Therefore, the gap between the end portion of the resin panel and the adjacent adjacent member can be set small to improve the appearance of the end portion (parting portion) of the resin window.

According to other features of the present disclosure, the thin-walled region gradually decreases in thickness from the main body region toward the central portion of the thin-walled region. Therefore, the thickness is continuously reduced from the edge portion to the central portion of the resin panel, so that the central thin-walled region and the surrounding main body region are arranged.

As a result, when the resin panel is thermally expanded, it bends upward in almost the entire region from the end to the center to absorb the displacement in the plane direction. The displacement of the end portion of the resin panel during thermal expansion is suppressed, and the change in the gap between the resin panel and the adjacent member can be substantially eliminated. As a result, the gap in the surface direction between the resin panel and the adjacent member can be set small to improve the appearance of the parting portion. The thickness may be thinned continuously toward the center, or may be gradually thinned. In the case of a continuously thinned structure, stress concentration at the time of bending can be avoided. In the case of a structure in which the wall thickness is gradually reduced, the resin panel can be easily deformed into a desired shape in the thickness direction.

According to another feature of the present disclosure, the inner surface and the outer surface of the resin panel each have a curvature, and the curvature of the inner surface is a resin window structure having a curvature larger than the curvature that keeps the distance in the thickness direction constant with respect to the outer surface. is there. Therefore, when the resin panel is gently curved in the direction of swelling to the outer surface side as a whole in the normal state, the curvature on the inner surface side is set to be larger, and a thin-walled region is formed in the central portion. In other words, for example, a recess is formed on the inner surface. As a result, the resin panel further bends toward the outer surface during thermal expansion, and displacement of the end portion and the main body region in the surface direction is suppressed.

According to another feature of the present disclosure, one end and the other end of the resin panel are fastened to the body with a resin adhesive. The resin adhesive is elastically deformed to allow the resin panel to tilt in the thickness direction. Therefore, the resin panel is reasonably tilted in the thickness direction, and the displacement in the surface direction is surely suppressed. Further, by suppressing the displacement of one end and the other end of the resin panel in the surface direction, deterioration of the resin adhesive is suppressed. Therefore, the fastening strength of the resin panel to the body is maintained. A urethane adhesive can be used as the resin adhesive.

It is the whole perspective view of the vehicle which has a resin window on a roof. It is a cross-sectional view taken along the line (II)-(II) in FIG. 1, and is a vertical cross-sectional view of the left end portion of the resin window according to the first embodiment. It is a vertical sectional view of the resin window which concerns on 1st Embodiment. It is a side view of the resin panel which concerns on 2nd Embodiment. It is a perspective view of the resin panel which concerns on 3rd Embodiment. It is a side view of the resin panel which concerns on 4th Embodiment.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 6. As shown in FIGS. 1 and 2, in the embodiment described below, the resin window 3 provided on the roof 2 of the vehicle body 1 is illustrated. The resin window 3 has a resin panel 10. The opening 4 provided in the roof 2 is closed by the resin panel 10.

The end portion of the resin panel 10 is adhered to the peripheral edge portion (vehicle body 1) of the opening 4 with a urethane adhesive 9. The opening 4 is partitioned by a front front header 5 arranged in the vehicle body 1, a rear header 6 at the rear, and roof side rails 7 and 8 on the left and right. As shown in FIGS. 2 and 3, the front end portion (one end portion) of the resin panel 10 is adhered to the flange portion 5a of the front header 5 with a urethane adhesive 9. As shown in FIG. 3, the rear end portion (the other end portion) of the resin panel 10 is adhered to the flange portion 6a of the rear header 6 with a urethane adhesive 9.

The resin panel 10 is an integrally molded product made of polycarbonate and has a black translucent rectangular flat plate shape. The thickness (plate thickness) of the resin panel 10 is changing. As shown in FIGS. 2 and 3, the thickness of the resin panel 10 decreases from the front and rear ends toward the center. In FIGS. 2 and 3, the thickness of the front end portion of the resin panel 10 is indicated by t0, and the thickness of the central portion in the front-rear direction is indicated by t1. Therefore, as for the thickness of the resin panel 10, the thickness t1 of the central portion is smaller than the thickness t0 of the front and rear end portions (t0> t1). The thickness of the resin panel 10 is continuously and gradually reduced from the front and rear end portions to the central portion. In FIG. 2, a two-dot chain line shows a curve of curvature that keeps the distance in the thickness direction constant with respect to the outer surface. The curvature of the inner surface is larger than the curvature indicated by the alternate long and short dash line. Since the curvature of the inner surface is made larger than the curvature of the outer surface, a thin region having a thickness of t1 is provided in the central portion.

In the present specification, the central portion having the smallest thickness t1 is used to mean a certain region (thin-walled region) including the central portion, rather than strictly referring to one point. The outer peripheral side, which is thicker than the thin-walled region, corresponds to the main body region. Further, in FIGS. 2 and 3, the change in thickness is exaggerated, but in reality, the resin panel 10 having a size of about 1400 mm in the front-rear direction has a thickness t0 at the end of about 5 mm and a thickness at the center. T1 is set to about 4.5 mm and thinning of about 0.5 mm (about 10 percent) is carried out. In the first embodiment, the thickness of the resin panel 10 is continuously changing. Therefore, the boundary between the thin-walled region and the main body region is not clear.

The thickness of the resin panel 10 is the smallest at the central portion (t1) in the front-rear direction. In the resin panel 10 of the first embodiment, the thickness changes in the front-rear direction, and the thickness does not change in the left-right direction and is uniform.

In the first embodiment, when the entire resin panel 10 is gently curved in the direction of swelling to the outer surface side (upward) in the normal state (reference temperature at which thermal expansion and contraction does not occur), the inner surface (indoor side surface) is larger than the curvature of the outer surface. By setting a large curvature of, the thickness decreases from the end to the center.

According to the resin window 3 exemplified above, the thickness of the resin panel 10 is continuously reduced from the front-rear end portion to the central portion to be thinned. Therefore, when the resin panel 10 thermally expands as shown by the alternate long and short dash line in FIG. 3, the displacement in the surface direction is absorbed by bending so as to expand upward in the thickness direction. On the contrary, when the resin panel 10 is thermally shrunk, the resin panel 10 bends downward in the thickness direction to absorb the displacement in the surface direction.

By bending in the thickness direction, the displacement in the surface direction due to thermal expansion and contraction is absorbed, so that the displacement of the front and rear ends of the resin panel 10 becomes small. Therefore, the gaps 5b and 6b between the adjacent members (front header 5 and rear header 6), which have been conventionally set to absorb the displacement of about 1 mm on one side in the surface direction, can be reduced.

Since the gaps 5b and 6b between the adjacent members (front header 5 and rear header 6) adjacent to the front and rear ends of the resin panel 10 can be reduced, the appearance of the front and rear parting portions of the resin window 3 can be improved. it can.

Further, the elastic deformation of the urethane adhesive 9 made of resin allows the end portion of the resin panel 10 to be inclined (deflected) in the thickness direction without difficulty. As a result, deterioration of the urethane adhesive 9 can be suppressed. Further, since the displacement of the front and rear ends of the resin panel 10 in the surface direction is suppressed, the deterioration can be suppressed by reducing the elastic displacement of the urethane adhesive 9. By suppressing the deterioration of the urethane adhesive 9, the fastening strength and sealing property of the resin panel 10 to the vehicle body 1 are maintained.

Various changes can be made to the above-exemplified embodiments. For example, FIG. 4 shows the resin panel 11 according to the second embodiment. In the first embodiment, a configuration in which the thickness of the resin panel 10 is reduced from the end to the center of the entire region in the front-rear direction is illustrated. In the second embodiment, of the total region of the resin panel 11 in the front-rear direction, one-third of the region including the central portion (central region 11a) is thinned (thickness t1) toward the central portion. ..

Of all the regions in the front-rear direction of the resin panel 11, the thickness t0 may be uniformly set for the front 1/3 region (front region 11b) and the rear 1/3 region (rear region 11c). In the second embodiment, the central region 11a can be set as a thin-walled region, and the front region 11b and the rear region 11c can be set as the main body region.

Also in the resin panel 11 according to the second embodiment, the thermal expansion and contraction is mainly performed by bending the central region 11a up and down, and accompanying this, the front region 11b and the rear region 11c are displaced in the thickness direction. As a result, the displacement of the front region 11b and the rear region 11c in the plane direction is suppressed. Therefore, also in the second embodiment, the gap 5b between the front end portion and the front header 5 of the resin panel 11 and the gap 6b between the rear end portion and the rear header 6 are set small, respectively, and the front and rear of the resin window 3 are set to be small. The appearance of the parting part can be improved.

FIG. 5 shows the resin panel 12 according to the third embodiment. The thickness of the resin panel 12 decreases toward the center in both the front-rear direction (vertical direction) and the left-right direction (horizontal direction) (t0> t1). In the third embodiment, the thickness of each of the entire area in the front-rear direction and the entire area in the left-right direction is continuously reduced toward the central portion.

The resin panel 12 according to the third embodiment has a gentle mortar shape recessed upward because the central portion has the thinnest wall thickness t1 in both the front-rear direction and the left-right direction.

According to the resin panel 12 of the third embodiment, displacement in the surface direction is performed by bending in the thickness direction in both the front-rear direction and the left-right direction. As a result, it is possible to reduce the displacement of the front-rear end portion and the left-right end portion in the surface direction during thermal expansion and contraction. Therefore, in addition to the gaps 5b and 6b between the front and rear ends of the resin panel 12 and the front header 5 and the rear header 6, the gaps between the left and right roof side rails 7 and 8 can be reduced. As a result, the appearance of the parting portion can be improved over the entire circumference of the resin window 3.

FIG. 6 shows the resin panel 13 according to the fourth embodiment. The thickness of the resin panel 13 according to the fourth embodiment is gradually reduced (at least two steps) from the front-rear end portion to the central portion in the front-rear direction. In the fourth embodiment, the thickness of the lower surface (indoor side surface) of the resin panel 13 is reduced in three steps of, for example, 0.2 mm from the front and rear ends.

The resin panel 13 of the fourth embodiment also undergoes thermal expansion and contraction in the surface direction by bending in the thickness direction. Therefore, the gaps 5b and 6b between the front and rear ends of the resin panel 13 and the front header 5 and the rear header 6 (adjacent members) can be reduced to improve the appearance of the parting portion of the resin window 3.

In addition to the configuration in which the thickness of the indoor side surface is gradually reduced, the thickness of the outdoor side surface may be gradually reduced. Further, in addition to the configuration in which the thickness is gradually reduced from the end to the center in the front-rear direction, or instead, the thickness may be gradually reduced from the end to the center in the left-right direction. ..

In the first to fourth embodiments described above, a configuration in which the thickness is continuously changed and a configuration in which the thickness is changed stepwise may be combined. When the thickness is continuously changed, the thickness change rate (curvature) may be constant or may be changed.

Further, the thin-walled region may be set strictly in the central portion, and a region shifted from the central portion to the front-back or left-right may be set as the thin-walled region.

Further, the thinned structure of the illustrated resin panel 10 (11, 12, 13) is not only when it is adhered to the vehicle body 1 with the urethane adhesive 9, but also when it is fastened by other fastening means such as screwing and clipping. Can be applied in the same manner.

Further, the front header 5, the rear header 6, or the left and right roof side rails 7 and 8 have been exemplified as adjacent members adjacent to the ends of the resin panel 10 (11, 12, 13). The same can be applied when setting a gap between the hair and the weather strip. Further, the thinned structure of the illustrated resin panel 10 (11, 12, 13) can be applied to a resin panel having other outer shapes such as a circle in addition to the illustrated rectangle.

Further, in each of the illustrated embodiments, the resin window 3 of the roof 2 of the vehicle body 1 is illustrated, but the resin window structure illustrating the structure in which the resin panel is attached to other parts such as the rear window and the side window of the vehicle body 1. Can be applied. Further, the illustrated resin window structure can be applied not only to the vehicle body of an automobile but also to a railroad vehicle, a ship such as a pleasure boat, various aircraft, and the like.

1 ... Vehicle body 2 ... Roof 3 ... Resin window 5 ... Front header (adjacent member)
5a ... Flange portion, 5b ... Gap between the front end portion of the resin panel 6 ... Rear header (adjacent member)
6a ... Flange portion, 6b ... Gap between the rear end portion of the resin panel 7 ... Roof side rail (adjacent member on the left side)
8 ... Roof side rail (adjacent member on the right side)
9 ... Urethane adhesive 10 ... Resin panel (1st embodiment)
11 ... Resin panel (second embodiment)
11a ... Central region, 11b ... Front region, 11c ... Rear region 12 ... Resin panel (third embodiment)
13 ... Resin panel (fourth embodiment)
t0 ... Thickness of main body region (end) t1 ... Thickness of thin region (center)

Claims (4)

It has a resin window structure
With the resin panel
A body having an opening closed by the resin panel and
It has an adjacent member that is disposed on the body and is adjacent to the resin panel with a gap in the surface direction.
The resin panel has one end and the other end fastened to the body, a thin-walled region located between the one end and the other end, between the thin-walled region and the one-end portion, and the thin-walled region. A resin window structure having a main body region having a thickness larger than that of the thin-walled region between the region and the other end portion. The resin window structure according to claim 1.
The thin-walled region has a resin window structure in which the thickness gradually decreases from the main body region toward the central portion of the thin-walled region. The resin window structure according to claim 1 or 2.
The inner and outer surfaces of the resin panel have curvatures, respectively.
A resin window structure in which the curvature of the inner surface is larger than the curvature that keeps the distance in the thickness direction constant with respect to the outer surface. The resin window structure according to any one of claims 1 to 3.
The one end and the other end of the resin panel are fastened to the body with a resin adhesive.
The adhesive has a resin window structure that elastically deforms so as to allow the resin panel to tilt in the thickness direction.

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