Side panel structure for bus

Abstract

To ensure, in a side panel structure for a bus, a gas-tightness between a panel member and a skeleton member while suppressing costs.SOLUTION: A side panel structure 1 for a bus includes a panel member 2 and a stiffener 4. The panel member 2 includes: an outer surface 21 that forms an external surface of a bus body; and an inner surface 22 that faces a skeleton member 3 of the bus body at the opposite side to the outer surface 21. The stiffener 4 includes: a holding portion 5 placed along the skeleton member 3; and a deforming portion 6 fastened and attached to the inner surface 22 of the panel member 2. In the stiffener 4, the holding portion 5 acts as a strut against compression load in the thickness direction, and the deforming portion 6 is connected to the holding portion 5 in the thickness direction, is more likely to be deformed by the compression load in the thickness direction than the holding portion 5, and is formed in a shape along the panel member 2.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a side panel structure suitable for a bus whose outer surface has a curved design. [Background technology]

[0002] Conventionally, a known side panel structure for buses is one in which a panel member forming the outer surface of the bus body is reinforced with a stiffener disposed on its inside (inner surface, back surface). For example, Patent Document 1 discloses, as a conventional technique, a structure in which a reinforcing pipe is provided on the inside of the side panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-19427 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the panel member is not necessarily formed in a flat plate shape, and may be formed, for example, in a curved shape to enhance the design. On the other hand, in a bus body, a straight square pipe is often used as a frame member disposed inside the panel member. For this reason, the stiffener disposed between the panel member and the frame member may be required to process the panel member side into a shape that follows, for example, the curved design surface of the panel member, and process the frame member side into a straight shape that follows the frame member in order to ensure airtightness between the panel member and the frame member. Such processing increases the investment cost of the forming machine.

[0005] The present invention has been devised in consideration of the above-mentioned problems, and one of its objectives is to ensure airtightness between panel members and frame members in a bus side panel structure while keeping costs down. [Means for solving the problem]

[0006] The present invention has been made to solve at least part of the above problems, and can be realized in the following aspects or application examples. (1) The side panel structure of a bus in this application example is characterized by comprising a panel member having an outer surface forming the outer surface of the bus body and an inner surface facing a skeleton member of the bus body on the opposite side of the outer surface, a retaining portion that braces against a compressive load in the thickness direction, and a deformation portion that is connected to the retaining portion in the thickness direction, is more easily deformed by the compressive load than the retaining portion and has a shape that conforms to the panel member, the retaining portion being arranged along the skeleton member, and the deformation portion being fixed to the inner surface of the panel member.

[0007] According to this application example, by applying a compressive load in the thickness direction to the stiffener, the shape of the retaining portion arranged along the framework member can be maintained while the deforming portion fixed to the inner surface of the panel member can be shaped to conform to (follow) the panel member. As a result, the retaining portion and the deforming portion of the stiffener have shapes corresponding to the framework member and the panel member, respectively, so that it is possible to ensure airtightness between the panel member and the framework member while suppressing costs.

[0008] (2) In the bus side panel structure related to this application example, the retaining portion may have a pillar portion extending straight along the thickness direction, and the deformation portion may have a plate-shaped joint portion overlapping the inner surface of the panel member, and a bent portion that is connected to the pillar portion and the joint portion in the thickness direction, has a V-shape with its tip facing in a horizontal direction perpendicular to the thickness direction in a cross section along the thickness direction, and is compressively deformed in the thickness direction under the compressive load. According to such a configuration, for example, during press processing in which a compressive load in the thickness direction is applied to the stiffener using a die, the compressive load can be directly transmitted to the die through the column portion. That is, the column portion functions like a tension rod against the compressive load, so that the shape of the holding portion is easily maintained, and the holding portion is easily maintained in a shape that conforms to the skeletal member. Therefore, the airtightness of the stiffener against the skeletal member can be effectively ensured. Meanwhile, in the deformation portion, the bending portion is compressed and deformed by the compressive load so as to narrow the V-shaped angle, so that the distance between the joint portion and the holding portion can be changed arbitrarily. As a result, the joint portion can be appropriately shaped to conform to the panel member. Therefore, the airtightness of the stiffener against the panel member can also be effectively ensured.

[0009] (3) In the side panel structure of the bus related to this application example, the retaining portion may have a plurality of pillar portions spaced apart from one another in the lateral direction, and a peripheral wall portion whose cross-section along both the thickness direction and the lateral direction is rectangular surrounding the plurality of pillar portions, and the deformation portion may have the same number of bending portions as the pillar portions and spaced apart from one another in the lateral direction. According to this configuration, the peripheral wall portion gives the retaining portion a closed cross-sectional structure, thereby increasing the rigidity of the retaining portion. As a result, the shape of the retaining portion is more easily maintained even when a compressive load is applied, and the retaining portion is more easily maintained in a shape that conforms to the framework member. This makes it possible to more effectively ensure the sealing of the stiffener against the framework member. In addition, the multiple bent portions are compressed and deformed by a compressive load in the thickness direction, so that the spacing between the joint portion and the column portion can be changed in a balanced manner in the lateral direction. As a result, the joint portion can be more appropriately shaped to conform to the panel member. This makes it possible to more effectively ensure the sealing of the stiffener against the panel member.

[0010] (4) In the side panel structure for a bus according to this application example, the retaining portion may have a recess formed in a surface of the peripheral wall portion that faces the framework member. According to this configuration, the recess of the holding portion functions as a space into which the adhesive can enter, so that the stiffener can be easily and appropriately fixed to the framework member with the adhesive. This improves both the ease of attachment and adhesion of the stiffener to the framework member.

[0011] (5) In the side panel structure for a bus according to this application example, the deformation portion may have a recess formed in a surface of the panel member that faces the inner surface at the joint. With this configuration, the recess in the deformation portion functions as a space into which the adhesive can enter, so that the stiffener can be easily and appropriately fixed to the inner surface of the panel member with the adhesive. This improves both the ease of attachment and adhesion of the stiffener to the panel member.

[0012] (6) The side panel structure of the bus according to this application example may include a plurality of stiffeners arranged to form an angle in a plan view of the inner surface of the panel member, and at the connection points between the stiffeners, each stiffener may be cut diagonally and have a continuous cross section. With this configuration, the panel member can be efficiently reinforced with multiple stiffeners. Also, the steps between the stiffeners at the connection points between the stiffeners can be reduced. This also effectively ensures the sealing between the panel member and the framework member.

[0013] (7) In the bus side panel structure according to this application example, the stiffener may be formed of an aluminum extrusion material. With this configuration, the press work for applying a compressive load in the thickness direction is easy, and the mold used for the press work can be made in a relatively simple block shape, which reduces the investment cost for the molding machine. Effect of the Invention

[0014] According to the present invention, in a bus side panel structure, it is possible to ensure airtightness between the panel member and the frame member while suppressing costs. [Brief description of the drawings]

[0015] [Figure 1] 1 is a left side view of a bus to which the bus side panel structure according to an application example is applied. FIG. [Diagram 2] 2 is a cross-sectional view of a main part of the bus of FIG. 1 (a cross-sectional view taken along the line AA of FIG. 1). [Diagram 3] 2 is a plan view of the side panel structure of FIG. 1 as viewed from the inside (a plan view of the inner surface of a panel member). [Figure 4] 2 is a view showing a stiffener provided in the side panel structure of FIG. 1 as viewed from the longitudinal direction. [Diagram 5] FIG. 5 is a perspective view illustrating an example of press working applied to the stiffener of FIG. 4. [Figure 6] 5 is a schematic diagram illustrating another example of press working applied to the stiffener of FIG. 4. [Figure 7] 5 is a view (corresponding to FIG. 4) of a stiffener according to a modified example seen from the longitudinal direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The following describes the embodiments (application examples) of the present invention with reference to the drawings. The following embodiments are merely examples, and are not intended to exclude various modifications or applications of techniques not clearly stated in the embodiments. The configurations of the following embodiments can be modified in various ways without departing from the spirit of the embodiments. They can also be selected or combined as necessary.

[0017] In the drawings, "FR" indicates the front of the bus, "UP" indicates the top of the bus, and "LH" indicates the left when facing the front of the bus. Hereinafter, the front-to-rear direction of a bus, which is a vehicle, will be referred to as the "vehicle length direction," the left-to-right direction of the bus will be referred to as the "vehicle width direction," and the up-down direction of the bus will be referred to as the "vehicle height direction."

[0018] [1. Configuration] As shown in Fig. 1, a bus side panel structure 1 (hereinafter simply referred to as "panel structure 1") according to this embodiment is applied to the side of a bus 10. The bus 10 is, for example, a tourist bus, and is provided with multiple trunk rooms 11 capable of accommodating luggage. Each trunk room 11 is provided under the bus 10, and is opened and closed by a trunk lid 2 arranged on the outer side in the vehicle width direction D2.

[0019] As shown in Fig. 2, the trunk lid 2 is a panel member (side panel) having an outer surface 21 that forms the outer surface of the bus body (body of the bus 10) and an inner surface 22 that faces the framework member 3 of the bus body on the opposite side (inner side, back side) of the outer surface 21. Hereinafter, the trunk lid 2 is also referred to as the "panel member 2", and the outer surface 21 and the inner surface 22 of the trunk lid 2 are also referred to as the "panel outer surface 21" and the "panel inner surface 22", respectively. The thickness of the panel member 2 (the distance between the panel outer surface 21 and the panel inner surface 22) is approximately uniform at every location, and the panel outer surface 21 and the panel inner surface 22 face in opposite directions to each other.

[0020] The panel member 2 does not extend along a plane (vertical plane) extending in the vehicle length direction D1 and the vehicle height direction D3, but has a curved shape. Specifically, the panel member 2 has a vertical cross section along the vehicle width direction D2 (a cross section perpendicular to the vehicle length direction D1, as shown in FIG. 2) that is gently curved so as to be convex outward in the vehicle width direction D2. In this way, the panel member 2, in which the curved panel outer surface 22 functions as a design surface, is used for the bus body, thereby improving the design of the bus 10.

[0021] The framework member 3 is disposed on the inside of the panel member 2 in the vehicle width direction D2. The framework member 3 is formed of a pair of horizontal members 31 extending in the vehicle length direction D1 and a pair of vertical members 32 extending in the vehicle height direction D3, and is a rectangular frame surrounding the access opening to the trunk room 11. The pair of horizontal members 31 are spaced apart from each other in the vehicle height direction D3, and the pair of vertical members 32 are spaced apart from each other in the vehicle length direction D1. Both the horizontal members 31 and the vertical members 32 are formed of square pipes extending straight (linearly). Therefore, both end faces 33 of the horizontal members 31 and the vertical members 32 facing outward in the vehicle width direction D2 are planes (vertical planes) extending in the vehicle length direction D1 and the vehicle height direction D3. Note that FIG. 2 shows only the main structure of the panel structure 1, and omits the floor and ceiling surfaces of the trunk room 11.

[0022] The panel structure 1 according to this embodiment includes the curved panel member 2 as described above, and a stiffener 4 disposed between the panel member 2 and the frame member 3. The stiffener 4 is a member that reinforces the panel member 2 from the inside (back side) in the vehicle width direction D2. The stiffener 4 according to this embodiment is fixed to the panel member 2, but is not fixed to the frame member 3 and can be separated from the frame member 3.

[0023] Specifically, the stiffener 4 is provided without any gap between it and the framework member 3 when the panel member 2 closes the trunk room 11 as shown in Fig. 2. On the other hand, when the panel member 2 opens the trunk room 11, the stiffener 4 moves together with the panel member 2 and moves away from the framework member 3. Note that a sponge (not shown) is attached to at least one of the framework member 3 and the stiffener 4 as a cushioning material to prevent direct contact between the two.

[0024] As shown in FIG. 3, the stiffener 4 of this embodiment includes a pair of lateral stiffeners 41 extending in the vehicle length direction D1 and a pair of vertical stiffeners 42 extending in the vehicle height direction D3, corresponding to the frame member 3 forming a rectangular frame. The lateral stiffeners 41 and the vertical stiffeners 42 are combined with each other to form a rectangular frame. That is, the lateral stiffeners 41 and the vertical stiffeners 42 are arranged to form a right angle (corner) in a plan view of the panel inner surface 22. The pair of lateral stiffeners 41 are spaced apart from each other in the vehicle height direction D3, and the pair of vertical stiffeners 42 are spaced apart from each other in the vehicle length direction D1. The lateral stiffeners 41 and the vertical stiffeners 42 have similar configurations (cross-sectional shapes) although they extend in different directions as described above.

[0025] At the connection points (corners of the rectangular frame) between the stiffeners 4, each stiffener 4 is cut diagonally. More specifically, both ends of the lateral stiffener 41 in the vehicle length direction D1 and both ends of the vertical stiffener 42 in the vehicle height direction D3 are cut diagonally. In this way, the lateral stiffeners 41 and the vertical stiffeners 42 having similar cross-sectional shapes are connected to each other at the diagonally cut points, so that the cross sections are continuous at the connection points between the stiffeners 4. For example, an adhesive is used to connect the stiffeners 4 together.

[0026] As shown in Fig. 4, the stiffeners 4 (horizontal stiffeners 41 and vertical stiffeners 42) have a retaining portion 5 with relatively high rigidity and a deforming portion 6 with relatively low rigidity. The retaining portion 5 is a portion for ensuring rigidity, whereas the deforming portion 6 is a portion for improving shape conformability in consideration of press workability. Note that Fig. 4 and Fig. 5 described below show the stiffeners 4 in a state before press work is performed.

[0027] The retaining portion 5 and deforming portion 6 of the stiffener 4 are connected in the thickness direction DT (the vertical (up and down) direction in FIG. 4). The retaining portion 5 is a portion that braces against a compressive load in the thickness direction DT, and its shape is maintained even during press working when a compressive load F in the thickness direction DT is input. In contrast, the deforming portion 6 is a portion that is more easily deformed than the retaining portion 5 by the compressive load F in the thickness direction DT, and is deformed by the above-mentioned press working to form a shape that fits the panel member 2. The deforming portion 6 is fixed to the inner surface 22 of the panel.

[0028] The stiffener 4 of this embodiment is formed of an aluminum extrusion material. Hereinafter, in the stiffener 4, the direction perpendicular to the thickness direction DT in which the holding portion 5 and the deformation portion 6 are arranged is also referred to as the "lateral direction DL" (horizontal [left and right] direction in FIG. 4). In the stiffener 4 formed of the extrusion material, the longitudinal direction perpendicular to both the thickness direction DT and the lateral direction DL is the extrusion direction, and in the state before the above-mentioned press working, the cross section along both the thickness direction DT and the lateral direction DL (the cross section is the same as the shape shown in FIG. 4, hereinafter also referred to as the "transverse cross section") has a uniform shape along the extrusion direction. The stiffener 4 before the press working extends straight (straight line) along the longitudinal direction. In this embodiment, a stiffener 4 having a symmetrical shape with respect to the center C (hereinafter also referred to as the "lateral center C") of the lateral direction DL in the state before the press working is exemplified.

[0029] The holding part 5 has a pillar part 51 extending straight along the thickness direction DT, and a peripheral wall part 52 having a rectangular cross section surrounding the pillar part 51. The holding part 5 of this embodiment has two pillar parts 51 spaced apart from each other in the horizontal direction DL. The two pillar parts 51 are arranged with the horizontal center C between them. However, the number and arrangement of the pillar parts 51 are not limited to those exemplified here. The peripheral wall part 52 is formed in a square pipe shape having a hollow part penetrating in the longitudinal direction. The peripheral wall part 52 is connected to both ends of the pillar part 51. In this embodiment, the two pillar parts 51 divide the hollow part of the peripheral wall part 52 into three rectangular parallelepiped spaces. A filler (e.g., a resin material) for reinforcement may be placed in these spaces (hollow parts of the peripheral wall part 52).

[0030] The retaining portion 5 is disposed along the skeleton member 3 when the panel member 2 to which the stiffener 4 is fixed is in a state in which the trunk room 11 is closed. At this time, an end face 53 on the outer side in the thickness direction DT (the side opposite to the deformation portion 6) of the peripheral wall portion 52 faces the end face 33 of the skeleton member 3. The end face 53 of the peripheral wall portion 52 is formed in a plane corresponding to the end face 33 of the skeleton member 3, and overlaps the end face 53 of the skeleton member 3 without any gap when the panel member 2 is in a state in which the trunk room 11 is closed.

[0031] On the other hand, the deformation portion 6 has a plate-shaped joint portion 61 overlapping the panel inner surface 22, and a V-shaped bent portion 62 with a tip 64 facing the horizontal direction DL in a cross section (cross section along the thickness direction DT). The joint portion 61 is a portion disposed along the panel inner surface 22. The deformation portion 6 of this embodiment further has a recess 63 formed on the surface facing the panel inner surface 22 at the joint portion 61. The recess 63 is a portion recessed to create a gap between the panel inner surface 22 and functions as a space into which an adhesive for fixing the stiffener 4 to the panel member 2 enters. Here, a deformation portion 6 in which three recesses 63 are disposed at intervals from each other in the horizontal direction DL at the joint portion 61 is exemplified. Each recess 63 is trapezoidal in shape with a long base side disposed on the panel inner surface 22 side in the cross section of the stiffener 4. However, the shape, number, and arrangement of the recesses 63 provided in the deformation portion 6 are not limited to those exemplified here.

[0032] The bent portion 62 is connected to the joint portion 61 and the pillar portion 51 of the holding portion 5 in the thickness direction DT. In detail, one end (upper end in FIG. 4) of the bent portion 62 in the thickness direction DT is connected to the joint portion 61, and the other end (upper end in FIG. 4) in the thickness direction DT is connected to the pillar portion 51 via the peripheral wall portion 52. Both ends of the bent portion 62 in the thickness direction DT are aligned with the pillar portion 51 in the thickness direction DT. The bent portion 62 is bent so as to narrow the V-shaped angle by the compressive load F applied during press processing, and is compressed and deformed in the thickness direction DT. As a result, the distance between the joint portion 61 and the holding portion 5 in the thickness direction DT is arbitrarily reduced.

[0033] The deformation portion 6 of this embodiment has two bent portions 62, which is the same number as the pillar portions 51 of the holding portion 5. The two bent portions 62 are spaced apart from each other in the horizontal direction DL, similar to the pillar portions 51 of the holding portion 5, and are disposed with the horizontal center C between them. The two bent portions 62 are disposed with their tips 64 facing in opposite directions in the horizontal direction DL. Here, two bent portions 62 are illustrated with their tips 64 facing outward in the horizontal direction DL (the opposite side to the horizontal center C).

[0034] As shown in Fig. 5, the stiffener 4 is pressed using, for example, two block-shaped dies 7 and 8. In this press working, a compressive load F in the thickness direction DT is applied to the stiffener 4. One die 7 arranged on the retaining section 5 side has a simple rectangular parallelepiped shape. In contrast, the other die 8 arranged on the deforming section 6 side has one surface 9 of the rectangular parallelepiped shape (hereinafter also referred to as the "pressing surface 9") shaped to correspond to the panel member 2, and this pressing surface 9 is pressed against the joint 61 of the deforming section 6.

[0035] The stiffener 4 is subjected to a compressive load F by being sandwiched between a pair of dies 7, 8 from both sides in the thickness direction DT. This causes the deformed portion 6 of the stiffener 4 to have a shape that conforms to the panel member 2. The stiffener 4 that has been subjected to this press working is then assembled to the panel member 2 arranged on the side of the bus 10 in a position where the thickness direction DT coincides with the vehicle width direction D2.

[0036] 5 shows an example of a die 8 having a generally curved pressing surface 9. A stiffener 4 press-formed with a die 8 having such a curved pressing surface 9 can be used as, for example, a vertical stiffener 42 shown in FIG. 2. Meanwhile, instead of the above die 8, a die 8' having an overall inclined flat pressing surface 9' may be used as shown in FIG. 6. A stiffener 4 press-formed with a die 8' having such an inclined flat pressing surface 9' can be used as, for example, a horizontal stiffener 41 shown in FIG. 2.

[0037] [2. Actions and Effects] (1) The stiffener 4 has a retaining portion 5 that braces itself against a compressive load F in the thickness direction DT, and a deforming portion 6 that is more easily deformed by the compressive load F than the retaining portion 5. For this reason, by simply applying a compressive load F to the stiffener 4, for example by press working, the shape of the retaining portion 5 arranged along the skeletal member 3 can be maintained while the deforming portion 6 fixed to the panel inner surface 22 can be shaped to conform to (follow) the panel member 2. As a result, the retaining portion 5 and the deforming portion 6 of the stiffener 4 are shaped according to the skeletal member 3 and the panel member 2, respectively, so that the airtightness between the panel member 2 and the skeletal member 3 can be ensured while keeping costs down.

[0038] In order to ensure airtightness between the panel member 2 and the framework member 3, it is also possible to use, for example, a pressed part made of steel plate that does not have the above-mentioned retaining portion 5 and deforming portion 6 as a stiffener. However, the press working of forming the steel plate into a shape that conforms to the panel member 2 involves drawing using a male die and a female die, which results in increased investment costs for forming machines compared to press working using the above-mentioned simple block-shaped dies 7, 8, 8'.

[0039] It is also possible to use an extrusion material that does not have the above-mentioned retaining portion 5 and deforming portion 6 as a stiffener after bending it to a shape that conforms to the panel member 2. However, this type of bending process gives the extrusion material a uniform bent shape, so the extrusion material after bending cannot be made to conform to the straight end face 33 of the skeleton member 3. Therefore, in this case, it becomes necessary to give the skeleton member 3 a similar bent shape, and the molding cost of the skeleton member 3 increases.

[0040] In contrast, according to the stiffener 4 having the above-mentioned retaining portion 5 and deforming portion 6, the retaining portion 5 and the deforming portion 6 can be shaped to correspond to the frame member 3 and the panel member 2, respectively, simply by applying the compressive load F as described above. Therefore, compared to the case of using pressed parts of steel plate or parts obtained by bending an extrusion material, it is possible to ensure airtightness between the panel member 2 and the frame member 3 while keeping costs down.

[0041] (2) In the holding portion 5 of the stiffener 4, the column portions 51 extend straight along the thickness direction DT, so that, for example, during press processing in which a compressive load F in the thickness direction DT is applied to the stiffener 4 using the die 7, the compressive load F can be directly transmitted to the die 7 through the column portions 51. In other words, the column portions 51 function like tension rods against the compressive load F, making it easier to maintain the shape of the holding portion 5, and therefore easier to maintain the shape of the holding portion 5 along the skeletal member 3. Therefore, the sealing of the stiffener 4 against the skeletal member 3 can be effectively ensured.

[0042] Meanwhile, the deformation portion 6 of the stiffener 4 is provided with a plate-shaped joint 61 overlapping the panel inner surface 22, and a bent portion 62 that is V-shaped with its tip 53 facing the horizontal direction DL and is compressively deformed in the thickness direction DT under a compressive load F. Therefore, the bent portion 62 is compressively deformed by the compressive load F to narrow the angle of the V shape, so that the distance between the joint 61 and the retaining portion 5 can be changed arbitrarily. As a result, the joint 61 can be shaped appropriately to fit the panel member 2. Therefore, the sealing of the stiffener 4 to the panel member 2 can be effectively ensured.

[0043] (3) The retaining portion 5 of the stiffener 4 is provided with the peripheral wall portion 52 having a rectangular cross section surrounding the multiple pillar portions 51, and the peripheral wall portion 52 gives the retaining portion 5 a closed cross section structure, thereby increasing the rigidity of the retaining portion 5. As a result, the shape of the retaining portion 5 is easily maintained even when a compressive load F is applied, and the retaining portion 5 is more easily maintained in a shape that conforms to the skeleton member 3. Therefore, the airtightness of the stiffener 4 relative to the skeleton member 3 can be more effectively ensured. In addition, since a hollow portion is formed in the peripheral wall portion 52 having a closed cross section structure, the retaining portion 5 can be reinforced by filling this hollow portion as necessary. In this way, according to the retaining portion 5 having the peripheral wall portion 52, the hollow portion of the peripheral wall portion 52 can be used as a space for filling a filler as a reinforcing material.

[0044] In addition, in the deformation portion 6 of the stiffener 4, the same number of bent portions 62 as the column portions 51 of the retaining portion 5 are provided at a distance from each other in the horizontal direction DL, so that the plurality of bent portions 62 are compressively deformed by the compressive load F, thereby changing the distance between the joint portion 61 and the column portions 51 in a well-balanced manner in the horizontal direction DL. As a result, the joint portion 61 can be shaped to more appropriately fit the panel member 2. Therefore, the sealing performance of the stiffener 4 with respect to the panel member 2 can be more effectively ensured.

[0045] (4) In the joint 61 of the above-mentioned deformation portion 6, the recess 63 is formed on the surface facing the panel inner surface 22, and the recess 63 functions as a space into which the adhesive can enter, so that the stiffener 4 can be easily and appropriately fixed to the panel inner surface 22 with the adhesive. Therefore, both the ease of attachment and adhesion of the stiffener 4 to the panel member 2 are improved.

[0046] (5) In the above panel structure 1, the stiffeners 4 are arranged to form an angle in a plan view of the panel inner surface 22, so that the panel member 2 can be efficiently reinforced by the stiffeners 4. In addition, at the connection points between the stiffeners 4, each stiffener 4 is cut diagonally and the cross section is continuous, so that the step between the stiffeners 4 is reduced. This also effectively ensures airtightness between the panel member 2 and the framework member 3.

[0047] (6) Since the stiffener 4 is made of extruded aluminum, press processing to apply the compressive load F is easy, and the dies 7, 8, 8' used in the press processing can be made into a relatively simple block shape. This reduces the investment cost for molding machines.

[0048] [3.Other] In the above embodiment, the panel member 2 is a trunk lid that opens and closes the trunk room 11, but the above panel structure 1 can be similarly applied to panel members other than the trunk lid. The stiffener disposed between the panel member and the framework member that does not require opening and closing operations may be fixed not only to the panel member but also to the framework member. In this case, sponge as a cushioning material is not required between the framework member and the stiffener.

[0049] As a stiffener fixed to both the panel member and the framework member, a stiffener 4' according to a modified example as shown in Fig. 7 may be applied. The stiffener 4' according to this modified example differs from the stiffener 4 shown in the above embodiment in that the retaining portion 5 further has a recess 54, but the other points are the same. Here, only the points of the stiffener 4' that are different from the stiffener 4 of the above embodiment will be described, and duplicated explanations will be omitted. In Fig. 7, the same reference numerals are used for the same configurations as those of the above embodiment.

[0050] The retaining portion 5 of the stiffener 4' according to the modified example has a recess 54 formed in the end face 53, which is the surface of the peripheral wall portion 52 facing the skeleton member 3. The recess 54 has the same function as the recess 63 formed in the joint portion 61 of the deformation portion 6. That is, the recess 54 of the retaining portion 5 is a portion recessed to create a gap between the end face 33 of the skeleton member 3 and functions as a space into which an adhesive for fixing the stiffener 4' to the skeleton member 3 enters. Here, a retaining portion 5 in which three recesses 54 are arranged at intervals in the horizontal direction DL on the end face 53 of the peripheral wall portion 52 is exemplified. However, the shape, number and arrangement of the recesses 54 provided in the retaining portion 5 are not limited to those exemplified in FIG. 7.

[0051] According to the stiffener 4' of the modified example, the recess 54 is formed in the end face 53 of the peripheral wall portion 52 of the retaining portion 5, and the recess 54 functions as a space into which adhesive can enter, so that the stiffener 4 can be easily and appropriately fixed to the end face 33 of the skeleton member 3 with adhesive. Therefore, both the ease of attachment and adhesiveness of the stiffener 4 to the skeleton member 3 are improved.

[0052] The shapes, number and arrangement of the stiffeners 4, 4' described above are merely examples. The retaining portion 5 only needs to have a structure that braces against the compressive load F in the thickness direction DT, and may have a structure different from that of the column portion 51, or the peripheral wall portion 52 may be omitted. The deforming portion 6 only needs to have a shape that is more easily deformed by the compressive load F than the retaining portion 5 and conforms to the panel member 2, and the joint portion 61 and the recessed portion 63 may be omitted, and the deforming portion 62 may have a structure different from that of the bent portion 62.

[0053] As described above, the two bent portions 62 spaced apart from each other in the lateral direction DL may be disposed with their tips 64 facing inward in the lateral direction DL (toward the lateral center C). The deformation portion 6 may have a plurality of bent portions 62 connected in the thickness direction DT so as to form a W-shape in cross section, or may have three or more bent portions 62 spaced apart from each other in the lateral direction DL. When three or more bent portions 63 are provided spaced apart from each other in the lateral direction DL, it is preferable that the same number of pillar portions 51 as the bent portions 63 are similarly provided in the holding portion 5 spaced apart from each other in the lateral direction DL.

[0054] The stiffeners 4, 4' may not be extruded materials, and may be made of materials other than aluminum. The number and arrangement of the stiffeners 4, 4' fixed to the panel member 2 are not limited to the above example. The shapes of the panel member 2 and the framework member 3 are also examples. The panel member 2 may have a more complicated shape, for example, a shape partially bent into a V-shape. Even when a panel member having such a complicated shape is applied, the stiffeners 4, 4' can maintain the shape of the retaining portion 5 when a compressive load F is applied, while allowing the deformation portion 6 to have a shape that conforms to the panel member. Therefore, as described above, it is possible to ensure the sealing between the panel member and the framework member while suppressing costs.

[0055] [4. Notes] Regarding the above embodiment, the following supplementary notes are further disclosed.

[0056] (Appendix 1) a panel member having an outer surface forming an outer surface of the bus body and an inner surface opposite to the outer surface and facing a frame member of the bus body; a stiffener having a retaining portion that braces against a compressive load in a thickness direction, and a deforming portion that is connected to the retaining portion in the thickness direction and is more easily deformed by the compressive load than the retaining portion and has a shape that conforms to the panel member, the retaining portion being disposed along the framework member, and the deforming portion being fixed to the inner surface of the panel member; The bus side panel structure is characterized by the following:

[0057] (Appendix 2) The holding portion has a pillar portion extending straight along the thickness direction, The deformation portion has a plate-shaped joint portion overlapping the inner surface of the panel member, and a bent portion that is connected to the column portion and the joint portion in the thickness direction, has a V-shape with a tip facing in a lateral direction perpendicular to the thickness direction in a cross section along the thickness direction, and is compressively deformed in the thickness direction by the compressive load. 2. The side panel structure of a bus according to claim 1.

[0058] (Appendix 3) the holding portion has a plurality of the column portions spaced apart from each other in the lateral direction, and a peripheral wall portion whose cross section along both the thickness direction and the lateral direction is rectangular and surrounds the plurality of the column portions, The deformation portion has the same number of bent portions as the number of post portions spaced apart from each other in the lateral direction. 3. The side panel structure of a bus according to claim 2.

[0059] (Appendix 4) The holding portion has a recess formed on a surface of the peripheral wall portion facing the framework member. 4. The side panel structure of a bus according to claim 3.

[0060] (Appendix 5) The deformation portion has a recess formed on a surface of the panel member facing the inner surface at the joint. 5. The side panel structure for a bus according to claim 2,

[0061] (Appendix 6) The panel member has a plurality of stiffeners arranged to form an angle in a plan view on the inner surface of the panel member, At the connection points between the stiffeners, each stiffener is cut obliquely and the cross section is continuous. 6. The side panel structure for a bus according to claim 1,

[0062] (Appendix 7) The stiffener is formed of an aluminum extrusion material. 7. The side panel structure for a bus according to claim 1, [Explanation of symbols]

[0063] 1 Panel structure (bus side panel structure) 2 Trunk lid (panel material) 3. Frame members 4,4′ stiffener 5 Holding part 6 Deformation section 7. Mold 8. Mold 8′ Mold 9 Pressing surface 9' Pressing surface 10 Bus 11 Storage room 21 Panel outer surface (outer surface of panel member 2) 22 Panel inner surface (inner surface of panel member 2) 31 Horizontal member 32 Vertical members 33 End face 41 Horizontal stiffener 42 Vertical stiffener 51 Column section 52 Peripheral wall section 53 End face 54 Recess 61 Joint 62 Bend 63 Recess 64 Tip C horizontal center D1 Vehicle length direction (front / rear direction) D2 Vehicle width direction (left and right) D3 Vehicle height direction (up and down) DL Horizontal DT thickness direction F Compressive load

Claims

1. a panel member having an outer surface forming an outer surface of the bus body and an inner surface opposite to the outer surface and facing a frame member of the bus body; a stiffener having a retaining portion that braces against a compressive load in a thickness direction, and a deforming portion that is connected to the retaining portion in the thickness direction and is more easily deformed by the compressive load than the retaining portion and has a shape that conforms to the panel member, the retaining portion being disposed along the framework member, and the deforming portion being fixed to the inner surface of the panel member; The bus side panel structure is characterized by the following:

2. The holding portion has a pillar portion extending straight along the thickness direction, The deformation portion has a plate-shaped joint portion overlapping the inner surface of the panel member, and a bent portion that is connected to the column portion and the joint portion in the thickness direction, has a V-shape with a tip facing in a lateral direction perpendicular to the thickness direction in a cross section along the thickness direction, and is compressively deformed in the thickness direction by the compressive load.

2. The side panel structure of claim 1.

3. the holding portion has a plurality of the column portions spaced apart from each other in the lateral direction, and a peripheral wall portion whose cross section along both the thickness direction and the lateral direction is rectangular and surrounds the plurality of the column portions, The deformation portion has the same number of bent portions as the number of post portions spaced apart from each other in the lateral direction.

3. The bus side panel structure according to claim 2.

4. The holding portion has a recess formed on a surface of the peripheral wall portion facing the framework member.

4. The bus side panel structure according to claim 3.

5. The deformation portion has a recess formed on a surface of the panel member facing the inner surface at the joint.

3. The bus side panel structure according to claim 2.

6. The panel member has a plurality of stiffeners arranged to form an angle in a plan view on the inner surface of the panel member, At the connection points between the stiffeners, each stiffener is cut obliquely and the cross section is continuous.

2. The side panel structure of claim 1.

7. The stiffener is formed of an aluminum extrusion material.

2. The side panel structure of claim 1.

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