JP2011183924A - Ceiling structure for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling structure for a vehicle capable of exerting heat insulating property in a wide range. <P>SOLUTION: This ceiling structure 1 includes a ceiling base material 3 and an uneven reinforcing material 5 laminated at the cabin outside of the ceiling base material 3. A hollow part 10 is formed between the ceiling base material 3 and the reinforcing material 5. A slit 11 is formed in an abutting part 9 abutting on the ceiling base material 3 in the reinforcing material 5. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vehicular ceiling structure, and more particularly to a vehicular ceiling structure capable of exhibiting heat insulation over a wide range.

  Conventionally, as a vehicle ceiling structure, a ceiling base material and an uneven reinforcing material laminated on the outside of the passenger compartment of the ceiling base material are provided, and heat insulation is enhanced between the ceiling base material and the reinforcing material. For example, a plurality of hollow portions are formed (for example, see Patent Document 1).

JP 2006-36089 A

  However, in the technique of Patent Document 1, since the reinforcing material is formed in an uneven shape, the reinforcing material follows the surface shape of a portion having a relatively large curvature, such as the outer edge side of the ceiling base material or the sun visor housing. It becomes difficult to make it. Therefore, for example, as shown in FIGS. 9 and 10, the hollow portion 110 is not formed in the portion 103 b having a relatively large curvature of the ceiling base material 103, and the hollow portion corresponding to the central side 103 a of the ceiling base material 103 is formed. 110 is formed and the reinforcing material 105 is made to follow the surface shape of the ceiling base material 103 at present. As a result, the hollow portion 110 cannot exert heat insulation over a wide range.

  This invention is made | formed in view of the said present condition, and aims at providing the vehicle ceiling structure which can exhibit heat insulation in a wide range.

The present invention is as follows.
1. A vehicle ceiling structure comprising: a ceiling base material; and a concavo-convex reinforcing material laminated on a vehicle exterior side of the ceiling base material,
A ceiling structure for a vehicle, wherein a hollow portion is formed between the ceiling base material and the reinforcing material, and a slit is formed in a contact portion of the reinforcing material that contacts the ceiling base material. .
2. The slit is formed in a portion of the contact portion that is in contact with a portion of the ceiling base material having a curvature larger than the curvature of the center side of the ceiling base material. The vehicle ceiling structure described.
3. The slit is formed in a portion of the contact portion that is in contact with an outer edge side of the ceiling base material. Or 2. The vehicle ceiling structure described in 1.
4). The plurality of hollow portions are arranged in a honeycomb shape, and the slit is formed in a portion of the contact portion surrounded by three adjacent hollow portions among the plurality of hollow portions. Claim 1. To 3. The ceiling structure for vehicles as described in any one of these.
5. The slit is formed in a substantially Y shape. The vehicle ceiling structure described.

According to the vehicle ceiling structure of the present invention, since the slit is formed in the abutting portion that abuts on the ceiling base material of the reinforcing material, a hollow portion is formed in an arbitrary portion between the ceiling base material and the reinforcing material. However, the reinforcing material can easily follow the surface shape of the ceiling base material by the slit. As a result, heat insulation can be exhibited over a wide range.
Further, when the slit is formed in a portion of the abutting portion that abuts on a portion of the ceiling base material having a curvature larger than the curvature of the center side of the ceiling base material, Even if the hollow portion is formed corresponding to the portion having a relatively large curvature, the reinforcing material can easily follow the surface shape of the ceiling base material, so that heat insulation can be exhibited in a wider range. In addition, the portion of the ceiling base material having a relatively large curvature is usually smaller in thickness and higher in rigidity than the center side of the ceiling base material. Therefore, even if the slit is formed corresponding to the portion having a relatively large curvature of the ceiling base material, the necessary and sufficient rigidity can be exhibited in the ceiling structure.
Further, when the slit is formed in a portion of the contact portion that contacts the outer edge side of the ceiling base material, a hollow portion may be formed corresponding to the outer edge side of the ceiling base material. Since the reinforcing material can easily follow the surface shape of the ceiling base material, it is possible to exhibit heat insulating properties in a wider range. Further, the outer edge side of the ceiling base material is usually smaller in thickness and higher in rigidity than the center side of the ceiling base material. Therefore, even if the slit is formed corresponding to the outer edge side of the ceiling base material, the necessary and sufficient rigidity can be exhibited in the ceiling structure.
Further, the plurality of hollow portions are arranged in a honeycomb shape, and the slit is formed in a portion of the contact portion surrounded by three adjacent hollow portions among the plurality of hollow portions. In this case, the rigidity of the ceiling structure can be further enhanced by the plurality of hollow portions arranged in a honeycomb shape, and the followability of the reinforcing material to the surface shape of the ceiling base material by the slits can be further enhanced.
Moreover, when the said slit is formed in the substantially Y shape, the followable | trackability of the reinforcing material with respect to the surface shape of the ceiling base material by a slit can further be improved.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
It is the top view seen from the vehicle interior side of the vehicle ceiling structure which concerns on an Example. It is the II-II sectional view taken on the line of FIG. It is a principal part enlarged view of the III arrow of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a principal part enlarged view of FIG. It is a principal part enlarged view of the V arrow view of FIG. It is the VII-VII sectional view taken on the line of FIG. It is explanatory drawing for demonstrating a slit with another form, (a) shows the form by which the slit was formed in the vehicle interior side of the reinforcing material, (b) was formed in the vehicle interior side of the reinforcing material. The form is shown. It is the top view seen from the vehicle interior side of the conventional vehicle ceiling structure. FIG. 10 is a sectional view taken along line XX in FIG. 9.

  The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

1. Vehicle Ceiling Structure Embodiment 1 A vehicle ceiling structure according to the present invention is a vehicle ceiling structure including a ceiling base material and a concavo-convex reinforcing material laminated on the outside of the passenger compartment of the ceiling base material. A hollow portion (10) is formed between them, and a slit (9) is formed in a contact portion that contacts the ceiling base material of the reinforcing material (for example, see FIG. 4 and the like).
The “outside of the ceiling base material” is intended to mean the surface side of the ceiling base material facing the outside of the passenger compartment attached to the vehicle.

  The reinforcing material can be laminated, for example, on the outside of the ceiling base material through a non-breathable adhesive film (4) (see, for example, FIG. 4). Thereby, the internal space of a hollow part can be made into a non-venting space more reliably by an adhesive film, and heat insulation can be improved more.

  The slit is usually disposed in the vicinity of the hollow portion. The slit is formed, for example, in a portion of the [1] abutting portion that abuts on the ceiling base material portion (33, 34) having a curvature larger than the curvature of the center side (3a) of the ceiling base material. [2] Among the abutting parts, the form formed in the part that abuts on the outer edge side (3b) of the ceiling base material, [3] Of the abutting parts, formed on the ceiling base material In addition, one type or a combination of two or more types of forms formed in the portion in contact with the sun visor storage portion (7) can be given (for example, see FIGS. 1 and 2).

  In the above [1] to [3] forms, for example, the slit may not be formed in a portion of the contact portion that contacts the center side (3a) of the ceiling base (for example, FIG. 7 and the like). reference). Thereby, it can be set as the reinforcement material excellent in rigidity with a required minimum slit.

In the above [1] to [3] forms, for example, the maximum curvature of the center side (3a) of the ceiling base material is 3 × 10 ^{−4 to} 5 × 10 ⁻⁴ (preferably 3 × 10 ⁻⁴ to 4 × 10 ^{−. 4} , particularly 3.5 × 10 ⁻⁴ to 4 × 10 ⁻⁴ ). In the above-mentioned [1] mode, for example, the maximum curvature of the ceiling base material portions (33, 34) is 5 × 10 ^{−3 to} 0.1 (preferably 8 × 10 ^{−3 to} 0.1, particularly 0. 01-0.1). Moreover, in the said [2] form, the outer edge side (3b) of a ceiling base material contains the part (33,34) of the said ceiling base material, for example, and the maximum curvature of the outer edge side (3b) of a ceiling base material is 5 × 10 ^{−3 to} 0.1 (preferably 8 × 10 ^{−3 to} 0.1, particularly 0.01 to 0.1). Furthermore, in said [3] form, the maximum curvature of the housing part (7) of a ceiling base material is 0.03-0.2 (preferably 0.05-0.2, especially 0.06-0.2). ). The unit of curvature is “/ mm”.

  In said [1]-[3] form, the minimum thickness (t2) of the center side (3a) of a ceiling base material can be 5-10 mm (preferably 5-8 mm, especially 5-6 mm), for example. . Moreover, in said [1] form, the minimum thickness of the part (33, 34) of a ceiling base material can be 1-10 mm (preferably 1-7 mm, especially 1-5 mm), for example. Moreover, in said [2] form, the minimum thickness (t1) of the outer edge side (3b) of a ceiling base material can be 1-3 mm (preferably 1-2.5 mm, especially 1-2 mm), for example. . Furthermore, in said [3] form, the minimum thickness of the housing part (7) of a ceiling base material can be 2-5 mm (preferably 2-4 mm, especially 2-3 mm), for example.

  In said [2] form, the outer edge side (3b) of a ceiling base material can be a site | part within 300 mm (preferably within 200 mm) toward the center side (3a) from the outer edge edge of a ceiling base material, for example. .

  In the above [1] mode, for example, the hollow portion is disposed corresponding to the center side (3a) of the ceiling base material and the portions (33, 34) of the ceiling base material having a curvature larger than the curvature of the central side. Can be. Moreover, in the said [2] form, the said hollow part can be arrange | positioned corresponding to the center side (3a) and outer edge side (3b) of a ceiling base material, for example. Moreover, in the said [3] form, the said hollow part can be arrange | positioned corresponding to the center side (3a) and sun visor storage part (7) of a ceiling base material, for example. By these, heat insulation can be exhibited in a wide range.

  Embodiment 1 As the vehicle ceiling structure, for example, the plurality of hollow portions are arranged in a honeycomb shape, and the slit is surrounded by three adjacent hollow portions of the plurality of hollow portions among the contact portions. The form currently formed in the part can be mentioned (for example, refer FIG. 5 etc.). In this form, for example, the planar shape of each of the plurality of hollow portions can be formed in a substantially regular hexagon, and the centers of the three adjacent hollow portions can be arranged at the apexes of the substantially regular triangle.

  In the case of the above-mentioned form, for example, the slit can be formed in a substantially Y shape. The length (12) of one side of the substantially Y-shaped slit can be, for example, 2 to 10 mm (preferably 2 to 8 mm, particularly 2 to 6 mm). Moreover, the length (l1) of one side of the substantially hexagonal hollow portion can be, for example, 5 to 30 mm (preferably 5 to 20 mm, particularly 5 to 10 mm). Furthermore, the ratio (l2 / l1) between the length (l2) of one side of the substantially Y-shaped slit and the length (l1) of one side of the substantially hexagonal hollow portion is 1/15 to 1 (preferably 1 / 5 to 1/2, particularly preferably 1/4 to 1/3). This is because the followability and rigidity of the reinforcing material can be suitably achieved.

  The width (w2) of one side of the substantially Y-shaped slit can be, for example, 1 to 4 mm (preferably 1 to 3 mm, particularly 1 to 2 mm). Moreover, the space | interval (w1) of two adjacent substantially hexagonal hollow parts can be 2-5 mm (preferably 2-4 mm, especially 2-3 mm), for example. Further, the ratio (w2 / w1) between the width (w2) of one side of the substantially Y-shaped slit and the interval (w1) between two adjacent hexagonal hollow portions is 1/5 to 1 (preferably 1 / 5 to 2/3, particularly 1/3 to 1/2). This is because the followability and rigidity of the reinforcing material can be suitably achieved.

  Hereinafter, the present invention will be specifically described with reference to the drawings.

(1) Configuration of Vehicle Ceiling Structure As shown in FIGS. 1 and 2, the vehicle ceiling structure 1 according to the present embodiment has a ceiling base that faces a roof panel 2 (shown in phantom lines in FIG. 2). The material 3 and the uneven reinforcing material 5 laminated on the outside of the passenger compartment of the ceiling base material 3 via the adhesive film 4 (see FIG. 4).

  The ceiling base material 3 has a center side 3a and an outer edge side 3b which is an outer peripheral side of the center side 3a. The center side 3a and the outer edge side 3b are partitioned by an imaginary line shown in FIG. The distances L1 and L2 between the outer end of the outer edge side 3b on the left and right sides of the vehicle and the outer end of the center side 3a are about 200 mm. The distance L3 between the front end of the outer edge side 3b on the vehicle front side and the front end of the center side 3a is about 300 mm. Further, a distance L4 between the rear end of the outer edge side 3b on the rear side of the vehicle and the rear end of the center side 3a is about 300 mm. Further, the ceiling base material 3 is formed with a hole 40 for attaching a roof console, a room lamp, or the like.

The center side 3a of the ceiling base material 3 has a maximum curvature of about 4 × 10 ⁻⁴ / mm and a minimum thickness t2 (see FIG. 2) of about 3 mm. Further, the outer edge side 3b of the ceiling base material 3 includes portions 33 and 34 having a large curvature (see FIG. 2) and a concave sun visor storage portion 7 (see FIG. 1) formed on the ceiling base material 3. On the outer edge side 3b of the ceiling base material 3, the maximum curvature of the portions 33 and 34 is about 8 × 10 ⁻³ / mm, and the maximum curvature of the sun visor storage unit 7 is about 0.05. Further, the minimum thickness t1 (see FIG. 2) of the outer edge side 3b of the ceiling base material 3 is about 2 mm. A skin material (not shown) is laminated on the vehicle interior side of the ceiling base material 3.

  As shown in FIGS. 3 and 4, the reinforcing member 5 has a plurality of convex portions 8 and a concave contact portion 9 that contacts the vehicle interior side of the ceiling base material 3 via the adhesive film 4. is doing. A plurality of hollow portions 10 having a heat insulating space are formed between the convex portions 8 and the ceiling base material 3.

  The plurality of hollow portions 10 are formed over the central side 3a and the outer edge side 3b of the ceiling base material 3 (that is, the entire surface of the ceiling base material 3). The plurality of hollow portions 10 are arranged in a honeycomb shape. Specifically, each of the plurality of hollow portions 10 is formed in a substantially regular hexagonal planar shape, and the centers of the three adjacent hollow portions 10 are arranged at the apexes of a substantially equilateral triangle. Each hollow portion 10 has a side length l1 (see FIG. 3) of about 10 mm, a height h1 (see FIG. 4) of about 8 mm, and a thickness t (see FIG. 4). It is about 0.5 mm. Further, the interval w1 (see FIG. 5) between two adjacent hollow portions 10 is about 4 mm.

  Among the abutting portions 9 of the reinforcing material 5, the portion that abuts on the outer edge side 3 b of the ceiling base material 3, and the portion surrounded by the adjacent three hollow portions 10 among the plurality of hollow portions 10 A slit 11 is formed. On the other hand, the slit 11 is not formed in the portion of the contact portion 10 of the reinforcing member 5 that contacts the center side 3a of the ceiling base material 3 (see FIGS. 6 and 7).

  As shown in FIG. 5, the slit 11 has a substantially Y-shaped planar shape and is formed so as to penetrate the front and back sides of the reinforcing material 5. The length l2 of one side of the slit 11 is about 3 mm. Therefore, the ratio (l2 / l1) between the length l2 of one side of the slit 11 and the length l1 of the one side of the hollow portion 10 is about ３. Furthermore, the width w2 of one side of the slit 11 is about 2 mm. Accordingly, the ratio (w2 / w1) between the width w2 of one side of the slit 11 and the interval w1 between the two hollow portions 10 adjacent to each other is about ½.

(2) Manufacturing Method for Vehicle Ceiling Structure Next, a manufacturing method for the vehicle ceiling structure 1 having the above configuration will be described. The precursor of the ceiling base material 3 is vacuum-formed using the flat plate-shaped basic shape body, and the precursor of the reinforcing material 5 is vacuum-formed using the flat plate-shaped basic shape body. Thereafter, the vehicle ceiling structure 1 is obtained by hot press molding the precursors of the ceiling base material 3 and the reinforcing material 5 through the adhesive film 4. During the hot press molding, the precursor of the flat reinforcing material 5 is smoothly bent along the surface shape of the ceiling base material 3 by the slits 11.

  In the vehicle ceiling structure 1 having the above-described configuration, heat transfer usually occurs from the interior of the vehicle toward the outside of the interior of the vehicle in winter or the like. In this heat transfer, the amount of heat transferred from the vehicle interior to the ceiling base material 3 by heat conduction is greatly reduced by the heat insulation of the numerous hollow portions 10 provided corresponding to the entire surface of the ceiling base material 3.

(3) Effects of the Embodiment As described above, according to the vehicle ceiling structure 1 of the present embodiment, the slit 11 is formed in the contact portion 9 that contacts the ceiling base material 3 of the reinforcing member 5. Even if the hollow portion 10 is formed in an arbitrary portion between 3 and the reinforcing material 5, the reinforcing material 5 can easily follow the surface shape of the ceiling base material 3 by the slit 11. As a result, heat insulation can be exhibited over a wide range. Further, since the curved surface following the surface shape of the ceiling base material 3 is handled by the slits 11, the flat shaped basic shape body of the reinforcing material 5 can be made common regardless of the vehicle type.

  In the present embodiment, the slit 11 is formed in a portion of the contact portion 9 that contacts the outer edge side 3b of the ceiling base material (including the portions 33 and 34 and the sun visor storage portion 7). Even if the hollow portion 10 is formed corresponding to the outer edge side 3 b of the ceiling base material 3, the reinforcing material 5 can easily follow the surface shape of the ceiling base material 3. Therefore, heat insulation can be exhibited in a wider range. In addition, the outer edge side 3b of the ceiling base material 3 is usually smaller in thickness and higher in rigidity than the central side 3a of the ceiling base material 3. Therefore, even if the slit 11 is formed corresponding to the outer edge side 3b of the ceiling base material 3, the ceiling structure 1 can exhibit necessary and sufficient rigidity.

  In the present embodiment, the plurality of hollow portions 10 are arranged in a honeycomb shape, and the slits 11 are formed in the adjacent three hollow portions 10 among the plurality of hollow portions 10 in the contact portion 9. Since it is formed in the surrounded part, the rigidity of the ceiling structure 1 can be further enhanced by the plurality of hollow portions 10 arranged in a honeycomb shape, and the reinforcing material 5 with respect to the surface shape of the ceiling base material 3 by the slits 11 is provided. Followability can be further improved.

  Furthermore, in the present embodiment, since the slit 11 is formed in a substantially Y shape, the followability of the reinforcing material 5 to the surface shape of the ceiling base material 3 by the slit 11 can be further enhanced.

  In the present invention, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the said Example, although the hole-shaped slit 11 penetrated and formed in the front and back side of the contact part 9 of the reinforcing material 5 was illustrated, it is not limited to this, For example, Fig.8 (a) (b ), Groove-shaped slits 11 ′ and 11 ″ formed on at least one of the front surface side and the back surface side of the contact portion 9 of the reinforcing member 5 may be used.

  Moreover, in the said Example, although the form which provides the slit 11 in the vicinity of six vertices of one hollow part 10 was illustrated, it is not limited to this, For example, 3 of the six vertices of one hollow part 10 You may make it provide the slit 11 in the vicinity of one vertex.

  Moreover, in the said Example, although the substantially Y-shaped slit 11 was illustrated, it is not limited to this, For example, it is good also as slits, such as circular, a rectangle, a polygon, a substantially V shape, and a different shape.

  Moreover, in the said Example, although the form which forms the slit 11 in the part contact | abutted in the outer edge side 3b of the ceiling base material 3 among the contact parts 9 of the reinforcement material 5, it is not limited to this, For example, Of the abutment portion 9 of the reinforcing member 5, the slit 11 is formed only in a portion that abuts the portions 33 and 34 (see FIG. 2) of the ceiling base material 3 having a curvature larger than the curvature of the central side 3 a of the ceiling base material 3. Alternatively, the slit 11 may be formed only in a portion of the ceiling base material 3 that contacts the housing portion 7.

  Moreover, in the said Example, although the form used as the outer peripheral side of the center side 3a of the ceiling base material 3 was illustrated as the outer edge side 3b of the ceiling base material 3, it is not limited to this, For example, the outside of the ceiling base material 3 As an edge side, the form which is at least one side among the vehicle right and left sides of the center side 3a of the ceiling base material 3, the form which is at least one side of the vehicle front and rear sides of the center side 3a of the ceiling base material 3, etc. You may employ | adopt 1 type or the combination of 2 or more types.

  Moreover, in the said Example, although the hollow part 10 arranged in a honeycomb form was illustrated, it is not limited to this, For example, it is good also as a hollow part arranged along a column and a row.

  Moreover, in the said Example, although the substantially regular hexagonal column-shaped hollow part 10 was illustrated, it is not limited to this, For example, it is good also as hollow parts, such as another prismatic shape, a truncated pyramid shape, a column shape, a truncated cone shape. .

  Furthermore, in the said Example, although the reinforcement material 5 laminated | stacked on the vehicle outer side of the ceiling base material 3 via the adhesive film 4 was illustrated, it is not limited to this, For example, it is adhesive by the vehicle outer side of a ceiling base material. It is good also as a reinforcing material laminated | stacked directly.

  The foregoing examples are for illustrative purposes only and are not to be construed as limiting the invention. Although the invention has been described with reference to exemplary embodiments, it is to be understood that the language used in the description and illustration of the invention is illustrative and exemplary rather than limiting. As detailed herein, changes may be made in its form within the scope of the appended claims without departing from the scope or spirit of the invention. Although specific structures, materials, and examples have been referred to in the detailed description of the invention herein, it is not intended to limit the invention to the disclosure herein, but rather, the invention is claimed. It covers all functionally equivalent structures, methods and uses within the scope of

  The present invention is not limited to the embodiments described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

  In addition to passenger cars, buses, trucks, etc., it is widely used as a technology related to vehicle ceiling structures such as trains, trains, and other railway vehicles, construction vehicles, agricultural vehicles, and industrial vehicles.

  DESCRIPTION OF SYMBOLS 1; Vehicle ceiling structure, 3; Ceiling base material, 3a; Center side, 3b; Outer edge side, 5: Reinforcement material, 7; Sun visor storage part, 9; Abutment part, 10: Hollow part, 11, 11 ', 11 '';slit.

Claims (5)

A vehicle ceiling structure comprising: a ceiling base material; and a concavo-convex reinforcing material laminated on a vehicle exterior side of the ceiling base material,
A ceiling structure for a vehicle, wherein a hollow portion is formed between the ceiling base material and the reinforcing material, and a slit is formed in a contact portion of the reinforcing material that contacts the ceiling base material. .   The vehicular ceiling structure according to claim 1, wherein the slit is formed in a portion of the abutting portion that abuts on a portion of the ceiling base material having a curvature larger than the curvature of the center side of the ceiling base material. .   The vehicle ceiling structure according to claim 1, wherein the slit is formed in a portion of the abutting portion that abuts on an outer edge side of the ceiling base material.   The plurality of hollow portions are arranged in a honeycomb shape, and the slit is formed in a portion of the contact portion surrounded by three adjacent hollow portions among the plurality of hollow portions. The ceiling structure for vehicles as described in any one of Claims 1 thru | or 3.   The vehicle ceiling structure according to claim 4, wherein the slit is formed in a substantially Y shape.

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