Attachment object

Abstract

The present invention enhances the durability against deformation and breakage of an attachment object attached by affixing members to an attachment site.　A rear spoiler (20) (attachment object) is an attachment object that is attached by fastening members (40) (affixing member) to a vehicle body (30) (attachment site), the attachment object comprising a plurality of attachment bases (23) (attachment units) where the rear spoiler (20) is attached to the vehicle body (30) by the fastening members (40), and first protrusions (61) provided on first straight lines (L1) (straight lines) connecting the plurality of attachment bases (23).

Description

Mounting object

[0001] The present invention relates to an object to be attached.

[0002] As an example of an attachment object, Patent Document 1 discloses a resin member attachment structure in which a resin member 30 (a long resin member) is attached to a trunk hood 21 (a vehicle body) by a fixing member 50. In this resin member attachment structure, the trunk hood 21 is provided with a first attachment portion 26 for fixing one end 51 of the fixing member 50. The one end 51 of the fixing member 50 is formed in a flat plate shape and fastened to the trunk hood 21 by a bolt 63. The resin member 30 is provided with a second attachment portion 41 at a position offset in the longitudinal direction of the resin member 30 from the first attachment portion 26 for engaging the other end 52 of the fixing member 50 so that the other end 52 is movable relative to the first attachment portion 26 in the longitudinal direction of the resin member 30. The second mounting portion 41 consists of a rectangular opening 42, two opposing edges 43, 43 along the longitudinal direction of the resin member 30 within this opening 42, a passage opening 44 formed adjacent to these edges 43, 43 and the opening 42, and protrusions 45, 45 protruding near the opening 42 of the edges 43, 43.

[0003] Japanese Patent Application Laid-Open No. 2015-123903

[0004] In the mounting object disclosed in the aforementioned Patent Document 1, although the resin member 30 (mounting object) can be mounted to the trunk hood 21 (mounting destination) using the fixing member 50, when a relatively large force is applied to the resin member 30, the force (load) is transmitted from the point of application (load point) to the entire resin member 30, but stress tends to concentrate in the area where the load is directly transmitted, which may cause deformation or damage to the resin member. In particular, there is a risk of deformation or damage to the area where stress tends to concentrate, such as the area around the opening 42 of the second mounting portion 41 of the resin member 30.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide an attachment object that is more durable against deformation and damage when attached to a mounting destination using a fixing member.

[0006] In order to solve the above problems, the mounting object of the present invention is a mounting object that is mounted to a mounting destination using a fixing member, and is characterized by having a plurality of mounting portions that mount the mounting object to the mounting destination using the fixing member, and a first convex portion provided on a straight line connecting the plurality of mounting portions.

[0007] According to the attachment device of this invention, when a relatively large force acts on the attachment device, the load is transmitted from the point where the force acts (load point) toward the entire attachment device. However, the first convex portions provided on the straight line connecting the multiple attachment portions can disperse the transmitted load. In other words, the first convex portions can make it difficult for the load input to the load point to be transmitted to the attachment portions, thereby increasing the rigidity of the attachment portions and their surroundings. As a result, the attachment device can be made more durable against deformation and breakage.

[0008] In the attachment object according to the present invention, it is preferable that the first protrusions are formed in a pair and face each other across the attachment portion. This allows the attachment portion to be reliably surrounded by the first protrusions. Therefore, the first protrusions can make it difficult for the load input to the load point to be transmitted to the attachment portion, thereby further increasing the rigidity of the attachment portion and its surroundings.

[0009] Furthermore, the attachment object according to the present invention preferably includes a second protrusion connecting the first protrusions. This allows the attachment portion to be more reliably surrounded by not only the first protrusions but also the second protrusions. Therefore, the first and second protrusions make it difficult for the load input to the load point to be transmitted to the attachment portion, thereby further increasing the rigidity of the attachment portion and its surroundings.

[0010] In the attachment object according to the present invention, the first protrusion preferably extends in a direction intersecting the straight line and is longer than the attachment portion. This allows the attachment portion to be more reliably surrounded by the first protrusion. Therefore, the first protrusion and the second protrusion make it difficult for the load input to the load point to be transmitted to the attachment portion, thereby further increasing the rigidity of the attachment portion and its surroundings.

[0011] According to the present invention, it is possible to provide an attachment object that is attached to an attachment destination by a fixing member and has higher durability against deformation and damage.

[0012] 1 is a rear perspective view showing an embodiment of a vehicle body 30 to which an attachment object (rear spoiler 20) according to the present invention is applied. FIG. 2 is a partially enlarged cross-sectional view showing a portion of the rear spoiler 20 taken along line 2-2 shown in FIG. 1. FIG. 3 is a bottom view showing the lower member 22 of the rear spoiler 20 shown in FIG. 2. FIG. 4 is an enlarged bottom view showing the periphery including the mounting base 23 shown in FIG. 3 (the mounting base 23 located second from the right end in FIG. 3). FIG. 5 is a partially oblique view showing a portion of the lower member 22 according to the embodiment (a portion including the mounting base 23 located at the leftmost end in FIG. 3). FIG. 6 is a partially oblique view showing a portion of a lower member 122 according to a first modified example. FIG. 7 is a partially oblique view showing a portion of a lower member 222 according to a second modified example. FIG. 8 is a partially oblique view showing a portion of a lower member 322 according to a third modified example. FIG. 9 is a partially enlarged cross-sectional view showing the reaction force range of the upper member 21 (when the first protrusion 61 is relatively long). FIG. 10 is a partially enlarged cross-sectional view showing the reaction force range of the upper member 21 (when the first protrusion 61 is relatively short).

[0013] An embodiment of the attachment object according to the present invention will be described below with reference to the drawings. However, the present invention is not limited to this embodiment, and various modifications and improvements can be made based on the knowledge of those skilled in the art.

[0014] As shown in Figure 1, the rear spoiler 20 (attachment object) is attached to the upper part of a back door 32 that is connected to a roof portion 31 of a vehicle body 30, and is located behind the roof portion 31 and extends rearward from the back door 32. The rear spoiler 20 is formed in a horizontally elongated shape that is approximately the same size as the left-right width of the upper part of the back door 32, and is formed in an elongated shape whose width in the fore-and-aft direction of the vehicle is shorter than the left-and-right width. The rear spoiler 20 is attached to the vehicle body 30, to which it is attached, by fastening members 40 (see Figure 2), which are fixing members.

[0015] The object to be attached is not limited to the rear spoiler 20, but is preferably an automotive component such as an exterior component of an automobile, such as a front spoiler, or an interior component of an automobile. The object to be attached is not limited to synthetic resin material, but a composite material such as carbon fiber reinforced plastic may be used. Furthermore, the attachment destination is the vehicle body when the object to be attached is an automotive component, but is not limited to this, and may be the body of an electrical appliance such as a printer, personal computer, or television. Furthermore, the fixing member is not limited to the fastening member 40, but may be a rivet or an engaging member having recesses and protrusions that engage with each other.

[0016] 2, the rear spoiler 20 includes an upper member 21 made of synthetic resin and a lower member 22 made of synthetic resin. The upper member 21 and the lower member 22 are fixed to each other by vibration welding, for example. The upper member 21 and the lower member 22 may also be fixed to each other by a fixing method other than vibration welding, for example, by adhesive or screw fastening.

[0017] The lower member 22 is integrally formed with a mounting base 23, which is a mounting portion for mounting the rear spoiler 20 (mounting object) to the vehicle body 30 (mounting destination). The mounting base 23 is provided to protrude outward (downward) from the lower member 22. As shown in Fig. 2 , a nut member 41 is held by the mounting base 23, and a bolt member 42 is fastened to the nut member 41 from the tailgate 32 side (the vehicle body 30 side), thereby mounting the rear spoiler 20 to the tailgate 32.

[0018] 3, the mounting base 23 is formed at a predetermined location on the rear spoiler 20. One or more predetermined locations are provided at locations necessary for fixing the rear spoiler 20 to the vehicle body 30. In this embodiment, the mounting base 23 is provided at four locations.

[0019] In this embodiment, the mounting base 23 is formed as a pedestal-shaped convex portion (or concave portion). As shown in Fig. 4, the mounting base 23 includes a base 51 and a base wall portion 52. The base 51 is formed in a U-shape in a plan view and holds the held portion 41d (see Fig. 2) of the nut member 41 (fixing member).

[0020] The base 51 is formed in a U-shape and a plate shape in a plan view, and has a holding opening 53 on the inside thereof. The base 51 includes a first base 51 a (which may be referred to as a left base), a second base 51 b (which may be referred to as a front base) whose base end is connected to one end (front end) of the first base 51 a, and a third base 51 c (which may be referred to as a rear base) whose base end is connected to the other end (rear end) of the first base 51 a.

[0021] A holding opening 53 that opens toward the right side (toward the right in the horizontal direction of the base 51) is formed on the inside of the base 51. The holding opening 53 penetrates in the vertical direction (thickness direction of the base 51).

[0022] The inner peripheral edge of the base 51 is U-shaped and can also be referred to as the opening peripheral edge 53a of the retaining opening 53. This opening peripheral edge 53a of the retaining opening 53 holds the retained portion 41d (see FIG. 2) of the nut member 41 (fixing member). The opening peripheral edge 53a may also be referred to as the retaining portion. The retaining opening 53 slidably holds the retained portion 41d of the nut member 41 (fixing member). The nut member 41 is held to the base 51 by the retained portion 41d of the nut member 41 fitting into the inner peripheral edge of the base 51 (the opening peripheral edge 53a of the retaining opening 53). It is preferable to provide a protruding projection on the inner wall surface (particularly the opening end) of the U-shaped retaining opening 53. The projection functions to prevent the nut member 41 from coming loose once one end of the nut member 41 has been inserted to a predetermined position.

[0023] The base wall 52 connects (the outer peripheral edge of) the base 51 to the lower member 22 (the attachment object). As shown in FIG. 4 , the base wall 52 mainly includes a left wall 52a, a front wall 52b, and a rear wall 52c. The left wall 52a is connected to the left edge of the first base portion 51a of the base 51. The front end of the left wall 52a is connected to the left end of the front wall 52b, and the rear end of the left wall 52a is connected to the left end of the rear wall 52c. The front wall 52b is connected to the front edge of the second base portion 51b of the base 51.

[0024] The rear wall 52c is connected to the rear edge of the third base portion 51c of the base 51. The left wall 52a is disposed perpendicular to the front wall 52b and the rear wall 52c, and the front wall 52b and the rear wall 52c are disposed parallel to each other. The left wall 52a, the front wall 52b, and the rear wall 52c are disposed so as to form a first predetermined angle (e.g., 90 degrees) with respect to the base 51.

[0025] The first predetermined angle is set to an angle equal to or greater than 90 degrees and smaller than 180 degrees. The shapes of the left wall 52 a, the front wall 52 b, and the rear wall 52 c are not limited to those in this embodiment, and can be freely set to an optimum shape depending on the installation location of the mounting base 23 and the shape of the lower member 22.

[0026] The insertion opening 54 is an opening that communicates with the holding opening 53 and through which the nut member 41 (fixing member) can be inserted. The insertion opening 54 functions as an inlet / outlet for introducing and guiding the nut member 41 into and out of the holding opening 53. The insertion opening 54 includes a first opening formed between the second base portion 51b (the right end thereof) and the third base portion 51c (the right end thereof) of the base 51 and through which the cylindrical main body 41a of the nut member 41 can be inserted, and a second opening formed between the front wall 52b (the right end thereof) and the rear wall 52c (the right end thereof) of the base wall 52 and through which the second flange portion 41c can be inserted. The opening width of the first opening is set to a value at least larger than the outer diameter of the cylindrical main body 41a. The opening width of the second opening is set to a value at least larger than the short side (one side in the case of a square) of the second flange portion 41c.

[0027] When the nut member 41 is introduced into the insertion opening 54, the cylindrical body 41a of the nut member 41 is inserted into the first opening, and the second flange portion 41c of the nut member 41 is inserted into the second opening. When the nut member 41 is moved toward the holding opening 53, the held portion 41d (see FIG. 2) of the nut member 41 is guided by the opening periphery 53a, the first flange portion 41b moves along the lower surface (see FIG. 2) of the base 51, and the second flange portion 41c moves along the upper surface (see FIG. 2) of the base 51. Then, the nut member 41 is moved into the holding opening 53.

[0028] 2, the fastening member 40 includes a nut member 41 and a bolt member 42. The nut member 41 includes a cylindrical main body 41a, a first annular flange portion 41b provided coaxially at one end (lower end) of the cylindrical main body 41a, a second rectangular flange portion 41c provided coaxially at the other end (upper end) of the cylindrical main body 41a, and a retained portion 41d which is an annular recess formed by the outer wall surface of the cylindrical main body 41a, the first flange portion 41b, and the second flange portion 41c. An internal thread 41f is formed on the inner peripheral surface of the cylindrical main body 41a, into which the external thread of the bolt member 42 is threaded.

[0029] The width of the held portion 41d (the distance between the first flange portion 41b and the second flange portion 41c) is preferably set to be slightly larger than the thickness of the base portion 51 (inner peripheral portion) of the mounting base 23. The first flange portion 41b and the second flange portion 41c sandwich the base portion 51 (inner peripheral portion) of the mounting base 23. In other words, the held portion 41d is held by the base portion 51 (inner peripheral portion) of the mounting base 23.

[0030] A ring-shaped elastic member 41e is coaxially provided on the lower end surface of the first flange portion 41b. The second flange portion 41c is formed in a rectangular shape so as to be able to contact one of the inner wall surfaces (preferably the front wall 52b or the rear wall 52c) of the base wall portion 52 to restrict rotation of the nut member 41. Specifically, the length of the short side (one side in the case of a square) of the rectangular second flange portion 41c is set to be smaller than the distance between the front wall 52b and the rear wall 52c of the base wall portion 52 and larger than the front-to-rear width of the holding opening 53. The length of the long side (diagonal in the case of a square) of the rectangular second flange portion 41c is set to be larger than the distance between the front wall 52b and the rear wall 52c of the base wall portion 52.

[0031] Although the nut member 41 is held by the mounting base 23, a bolt member (not shown) may be held by the mounting base 23. In this case, the bolt member may be provided with a male thread coaxially on the cylindrical body 41a instead of a female thread on the cylindrical body 41a. Like the nut member 41, the bolt member includes a cylindrical body 41a, a first flange portion 41b, a second flange portion 41c, a held portion 41d, and an elastic member 41e. A general hexagonal nut or the like may be used as the nut member (not shown) to be fastened to the bolt member.

[0032] An attachment opening 23a is formed in the lower member 22 above the mounting base 23. The attachment opening 23a opens upward in Fig. 2. A base wall 52 is provided around the periphery of the attachment opening 23a.

[0033] Furthermore, as shown in FIG. 3, the lower member 22 is integrally formed with a plurality of first protrusions 61 .

[0034] 3 to 5, the lower member 22 includes a first surface 22a, a step portion 22b, a second surface 22c, and a third surface 22d. The first surface 22a, the step portion 22b, the second surface 22c, and the third surface 22d are integrally formed in this order from rear to front. The first surface 22a, the step portion 22b, the second surface 22c, and the third surface 22d each have a predetermined width in the front-rear direction, and each have the same predetermined width in the left-right direction.

[0035] The front edge of the first surface 22a is connected to the rear edge of the second surface 22c via a step 22b, and the front edge of the second surface 22c is connected to the rear edge of the third surface 22d.

[0036] As shown in Fig. 5, the step 22b has a step lower surface 22b1 that is different in height from the second surface 22c. The width of the step lower surface 22b1 in the front-to-rear direction is set to a predetermined width. The rear edge of the step lower surface 22b1 is connected to the front edge of the first surface 22a. The front edge of the step lower surface 22b1 is connected to one edge (lower edge) of the step side surface 22b2, and the other edge (upper edge) of the step side surface 22b2 is connected to the rear edge of the second surface 22c.

[0037] The step lower surface 22b1 is formed to form a predetermined angle with respect to the first surface 22a. The step lower surface 22b1 is also formed to be substantially parallel to the second surface 22c. The step lower surface 22b1 may also be formed to form a predetermined angle with respect to the second surface 22c. The third surface 22d is also formed to form a predetermined angle with respect to the second surface 22c.

[0038] A convex rib portion 22e extending in the left-right direction is formed on the lower surface side of the step lower surface 22b1. The convex rib portion 22e may be formed on the upper surface side of the step lower surface 22b1 instead of on the lower surface side of the step lower surface 22b1. Instead of the convex rib portion 22e, a concave groove extending in the left-right direction may be formed.

[0039] The protruding ridges 22e can increase the rigidity and strength of the step lower surface 22b1, and can suppress deformation such as warping and twisting of the step lower surface 22b1. In addition, the protruding ridges 22e extending in the left-right direction can block the transmission of stress (energy) in the front-rear direction at the step lower surface 22b1.

[0040] In the above-described lower member 22, the step portion 22b may be omitted. In this case, the front edge of the first surface 22a is directly connected to the rear edge of the second surface 22c. The rear end of the first protrusion 61 may originate from the front edge of the first surface 22a or from a point between the front edge of the first surface 22a and the mounting base 23. When the rear end of the first protrusion 61 originates from an intermediate point, the rear end of one first protrusion 61a and the rear end of the other first protrusion 61b may be connected by a second protrusion 62 (described later). As a result, the one first protrusion 61a, the other first protrusion 61b, and the second protrusion 62 can form a U-shaped protrusion, which can surround the mounting base 23 (surrounding it from three sides).

[0041] The above-mentioned mounting seats 23 are provided on the second surface 22c of the lower member 22. The mounting seats 23 are provided a predetermined distance away from the front edge of the step portion 22b. In this embodiment, the mounting seats 23 closer to the center in the left-right direction are disposed closer to the step portion 22b than the mounting seats 23 closer to the ends in the left-right direction. Alternatively, all of the mounting seats 23 may be provided the same distance away from the step portion 22b.

[0042] 3, the first protrusion 61 is provided on a first straight line L1 that connects the plurality of mounting bases 23. The first protrusion 61 is preferably provided so as to surround the periphery of the mounting base 23.

[0043] The first protrusions 61 are preferably formed as elongated protrusions (protrusions) that protrude downward from the lower surface of the lower member 22. For example, the first protrusions 61 are formed in a bead shape, but may also be formed in a rib shape. The first protrusions 61 are formed in pairs and are arranged facing each other across the mounting base 23. The first protrusions 61 are preferably arranged to intersect with the first straight line L1. The first protrusions 61 extend in a direction along a second straight line L2 that intersects with the first straight line L1 and are longer than the mounting base 23. The length of the first protrusions 61 in the direction along the second straight line L2 is longer than the length of the mounting base 23 in the direction along the second straight line L2.

[0044] Furthermore, it is preferable that the second straight line L2 is along a (virtual) straight line on which the fulcrum P3, the point of action P2, and the point of force P1 exist. In this case, the point of force P1 is not limited to one point, and there may be multiple points, and the point of force P1 may exist on an extension of the fulcrum P3 and the point of action P2. Furthermore, "along a straight line" here is not limited to being parallel to (coinciding with) a straight line, but also includes maintaining a distance close to the straight line, such as forming a predetermined small angle (e.g., a few degrees).

[0045] Furthermore, the first protrusion 61 may be formed as an elongated protrusion (protruding strip) that protrudes upward from the upper surface of the lower member 22. In this case, the first protrusion 61 may be referred to as a first recess formed in an elongated recess (recess) in the lower member 22. In this way, the first protrusion 61 or the first recess may be referred to as a non-flat portion (or a step or undulating portion) formed with a difference in height in the plate-like lower member 22.

[0046] The first protrusion 61 includes a first protrusion 61a and a second protrusion 61b. The rear ends (one end) of the first protrusion 61a and the second protrusion 61b are connected to the step 22b, and the front ends (the other end) of the first protrusion 61a and the second protrusion 61b extend to the third surface 22d. The rear ends of the first protrusions 61 do not have to be connected to the step 22b, and may start just before the step 22b. In this case, the rear end of the first protrusion 61a and the rear end of the second protrusion 61b may be connected by a second protrusion 62 (see FIG. 7). This allows the first protrusion 61a, the second first protrusion 61b, and the second protrusion 62 to form a U-shaped protrusion, which can surround the mounting base 23 (surrounding it from three sides).

[0047] Furthermore, the front end of the first protrusion 61 does not have to extend to the third surface 22d, and may extend to the second surface 22c. However, it is preferable that the front end of the first protrusion 61 extend to a predetermined position forward of the mounting base 23. This is because it becomes possible to completely cover (surround) the mounting base 23 in the front-to-rear direction.

[0048] 3 , the length (front-rear direction length) Dy of one first convex portion 61 a and the other first convex portion 61 b ​​is represented by the sum of a predetermined distance Dy1 from the fastening center (the center of the opening where the female thread of the nut member 41 is formed) to a first predetermined position located rearward and a predetermined distance Dy2 from the fastening center to a second predetermined position located forward. The first predetermined position is a position on the front side of the mounting base 23 as viewed from the load point P1, and the second predetermined position is a position on the rear side of the mounting base 23 as viewed from the load point P1. In this embodiment, the predetermined distance Dy1 is the distance from the fastening center to the front end of the step portion 22 b, and the predetermined distance Dy2 is a value that is longer than the distance from the fastening center to the rear end of the third surface 22 d but shorter than the distance from the fastening center to the front end of the third surface 22 d.

[0049] The left-right distance between the one first protrusion 61a and the other first protrusion 61b is set to a value greater than the left-right length of the mounting base 23. The left-right positions of the one first protrusion 61a and the other first protrusion 61b are set to a predetermined distance Dx from the fastening center. The predetermined distance Dx is preferably set to a value that ensures space for inserting the fixing member (nut member 41) attached to the mounting base 23. The predetermined distance Dx is preferably set taking into consideration the magnitude of the load received by the load point (load portion; may also be referred to as a force point) P1, the front-to-rear distance D1 between the load point P1 and the mounting base 23 (point of application (point of application) P2), and the left-to-right distance D2 between the load point P1 and the mounting base 23 (point of application P2).

[0050] For example, the predetermined distance Dx is set to 30 to 50 mm, and the distance in the left-right direction between one first convex portion 61a and the other first convex portion 61b is set to 60 to 100 mm.

[0051] When an upward force (external force) acts on the leading edge (rear edge) of the rear spoiler 20 (lower member 22), the load point P1 is a predetermined location (e.g., the center in the lateral direction) of the leading edge (rear edge) of the lower member 22. The load point P1 may also be set over the entire lateral length of the leading edge (rear edge) of the lower member 22. When the leading edge (rear edge) of the lower member 22 is lifted, the lower member 22 initially rotates about the mounting base 23, which is its mounting portion. However, after a location on the edge of the lower member 22 forward of the mounting base 23 comes into contact with the vehicle body 30, the contact location functions as a fulcrum P3. That is, in this case, the fulcrum P3 and the force point P1 are at both ends, and the action point P2 is in the middle, similar to a lever. Therefore, when the lower member 22 is lifted at the force point P1, a force that lifts the lower member 22 acts at the action point P2, with the contact point serving as a fulcrum (fulcrum portion) P3.

[0052] The width in the left-right direction of the one first protrusion 61a and the other first protrusion 61b is preferably set to a value smaller than the left-right width of the mounting base 23, and is preferably set to a size that does not damage the first protrusion 61 that forms the bead portion. The width of the one first protrusion 61a and the other first protrusion 61b is set to, for example, 15 to 30 mm.

[0053] The heights of the first protrusions 61a and 61b are set to the same height as the step 22b. This height is preferably set to a value that ensures the height required to insert the fixing member (nut member 41) attached to the mounting base 23. The heights of the first protrusions 61a and 61b are preferably set to a value ranging from 1 / 2 to 1 / 2 of the height of the step 22b, and more preferably to a value ranging from 1 / 4 to 1 / 2 of the height of the mounting base 23. The higher the height of the first protrusions 61 is, as long as it does not interfere with the components facing the first protrusions 61, the more likely it is that the rigidity of the mounting base 23 will be improved. The width and height of the first protrusions 61 are preferably set to values ​​that prevent load (stress: energy) from being easily transmitted to the mounting base 23, as described below.

[0054] The first protrusion 61 is formed to protrude from the lower member 22, and in this embodiment, is formed to protrude from the underside of the lower member 22. The first protrusion 61 is hollow and has a U-shaped cross section along the left-right direction. Note that the first protrusion 61 may not be hollow (it may be filled inside) and may have a square cross section along the left-right direction.

[0055] Furthermore, the first protrusion 61 may be formed to protrude from the upper surface side of the lower member 22. In this case, the first protrusion 61 may be called a recess rather than a protrusion, and may also be called a first recess. In short, it is preferable to provide a structure around the mounting base 23 that makes it difficult for the load (energy) to be easily transmitted to the mounting base 23, rather than a flat surface that allows the load (energy) to be transmitted relatively easily to the mounting base 23. Furthermore, the first protrusion 61 may not only be formed to protrude from the lower surface side or the upper surface side of the lower member 22, but may also be formed to protrude from both the lower surface side and the upper surface side.

[0056] The first protrusions 61 are not limited to being formed in pairs (two), but may be formed as one (single unit), or may be formed as three or more.

[0057] The first straight line L1 is a straight line connecting two adjacent mounting bases 23. The first straight line L1 is not limited to this, and may be a straight line connecting two non-adjacent mounting bases 23.

[0058] The first convex portion 61 (or the second convex portion 62) is not limited to being provided on the first straight line L1 connecting the mounting base 23, but may be provided on the third straight line L3 connecting the load point P1 and the mounting base 23, which is the point of application P2. The first convex portion 61 (or the second convex portion 62) may be provided between the load point P1 and the mounting base 23, which is the point of application P2, and is preferably provided on a path along which energy (load, stress) applied to the load point P1 is transmitted from the load point P1 to the point of application P2 (i.e., on a path along which a force generated inside the object (lower member 22) due to an external force acting on the load point P1 is transmitted). It is more preferable that the first convex portion 61 (or the second convex portion 62) be provided so as to cross the aforementioned transmission path. The transmission path is formed along the part where stress is easily transmitted, and in the case of plate-like members of the same thickness, it is basically linear, but it is not limited to being linear and may be curved or winding depending on the shape of the member, etc.

[0059] In the above-described embodiment, it is preferable to provide the first convex portion 61 (or the second convex portion 62) at a high stress transmission portion where stress is transmitted relatively easily within the object (lower member 22). This makes it possible to change the high stress transmission portion into a low stress transmission portion where stress is transmitted relatively less easily by the first convex portion 61 (or the second convex portion 62).

[0060] The step 22b may also be referred to as a convex portion provided on (crossing) the third straight line L3 connecting the load point P1 and the mounting base 23. Similar to the first convex portion 61, this convex portion also functions to make it relatively difficult for stress generated at the load point P1 by an external force to be transmitted to the application point P2.

[0061] (Actions and effects of the embodiment) The rear spoiler 20 (mounting object) according to the embodiment described above is an object to be mounted on the vehicle body 30 (mounting destination) by fastening members 40 (fixing members), and is provided with a plurality of mounting bases 23 (mounting portions) that mount the rear spoiler 20 to the vehicle body 30 by the fastening members 40, and a first convex portion 61 provided on a first straight line (straight line) L1 that connects the plurality of mounting bases 23.

[0062] According to the rear spoiler 20 of this embodiment, when a relatively large force acts on the rear spoiler 20, the load (stress / energy) is transmitted from the point where the force acts (load point) toward the entire rear spoiler 20. However, the first convex portion 61 provided on the first straight line L1 connecting the multiple mounting bases 23 can block and disperse the transmitted load. In other words, the first convex portion 61 can make it difficult for the load input to the load point to be transmitted to the mounting base 23, thereby increasing the rigidity of the mounting base 23 and its surroundings. As a result, the durability of the rear spoiler 20 against deformation and breakage can be further increased.

[0063] Furthermore, in the rear spoiler 20 according to this embodiment, it is preferable that the first protrusions 61 are formed in pairs and face each other across the mounting base 23. This allows the mounting base 23 to be reliably surrounded by the first protrusions 61. Therefore, the first protrusions 61 make it difficult for the load input to the load point to be transmitted by the mounting base 23, and it is possible to further increase the rigidity of the mounting base 23 and its surroundings.

[0064] Furthermore, in the rear spoiler 20 according to this embodiment, it is preferable that the first protrusion 61 extends in a direction intersecting the first straight line L1 (the direction in which the second straight line L2 extends) and is longer than the mounting base 23. This makes it possible to more reliably surround the mounting base 23 with the first protrusion 61. Therefore, the first protrusion 61 (and the second protrusion 62) can make it difficult for the load input to the load point to be transmitted to the mounting base 23, thereby further increasing the rigidity of the mounting base 23 and its surroundings.

[0065] (Modifications: First Modification) A first modification will now be described with reference to Fig. 6. In the above-described lower member 22, the step portion 22b is provided with the convex rib portion 22e, but in the lower member 122 according to the first modification, the step portion 122b does not have the convex rib portion 22e. Like the above-described step portion 22b, the step portion 122b has a step lower surface 22b1 and a step side surface 22b2. Like the above-described lower member 22, the lower member 122 has a first surface 22a, a second surface 22c, a third surface 22d, a plurality of mounting bases 23, and a plurality of first protrusions 61.

[0066] In the lower member 122 according to the first modified example, the convex ridge portion 22e is omitted, but the step portion 122b itself has a step lower surface 22b1 and a step side surface 22b2 that are in a bent relationship, thereby increasing rigidity and strength and making it possible to suppress deformation such as warping and twisting of the step portion 122b and, by extension, the step lower surface 22b1. Therefore, the step portion 122b extending in the left-right direction can block the transmission of stress (energy) in the front-rear direction at the step lower surface 22b1 or the step side surface 22b2. Therefore, the same functions and effects as those of the lower member 22 described above can be obtained.

[0067] (Second Modification) Furthermore, the lower member 122 according to the first modification (the lower member 22 (rear spoiler 20) according to the above-described embodiment) preferably further includes second protrusions 62 connecting the first protrusions 61, as shown in FIG. 7 . The lower member 222 according to the second modification includes the first surface 22a, the second surface 22c, the third surface 22d, the step portion 122b, the plurality of mounting bases 23, and the plurality of first protrusions 61, similar to the above-described lower member 122. The lower member 222 includes second protrusions 62. The second protrusions 62 connect the first protrusions 61, i.e., the first protrusions 61a and the other first protrusions 61b (which are formed as a pair and face each other across the mounting base 23). Specifically, the second protrusions 62 connect the front end of the first protrusion 61a to the front end of the other first protrusion 61b. The second protrusion 62 may connect the middle portion of one first protrusion 61 a and the middle portion of the other first protrusion 61 b. The second protrusion 62 is preferably located forward of the mounting base 23. This allows the mounting base 23 to be reliably surrounded by the step 122 b, one first protrusion 61 a, the other first protrusion 61 b, and the second protrusion 62.

[0068] Similar to the first protrusion 61, the second protrusion 62 is preferably formed as an elongated protrusion (protrusion strip) protruding from the lower surface side of the lower member 222. Also, similar to the first protrusion 61, the second protrusion 62 may be formed as an elongated recess (recess).

[0069] The second protrusions 62 do not necessarily have to connect the first protrusions 61 (i.e., one first protrusion 61a and the other first protrusion 61b). For example, as long as the second protrusions 62 are provided between the first protrusions 61a and the other first protrusions 61b, they may be directly connected to the first protrusions 61a and the other first protrusions 61b, or may be spaced apart (a predetermined distance) (not necessarily connected). In this case, the second protrusions 62 are provided along a fourth straight line that is different from the second straight line L2, which is the extension direction of the first protrusions 61. It is preferable that the fourth straight line is not parallel to the second straight line L2 but is aligned in a direction that intersects with the second straight line L2. The second protrusions 62 may be linear or curved.

[0070] According to the lower member 222 of the second modified example, the mounting base 23 can be more reliably surrounded not only by the first convex portion 61 but also by the second convex portion 62. Therefore, the first convex portion 61 and the second convex portion 62 can make it difficult for the load input to the load point to be transmitted to the mounting base 23, and it is possible to further increase the rigidity of the mounting base 23 and its surroundings.

[0071] In the lower member 222, a buffer member 62a is preferably provided on the surface of the second convex portion 62. The buffer member 62a is preferably provided at the location where the lower member 222 contacts the vehicle body 30, i.e., at the fulcrum P3, when an upward force (external force) acts on the leading edge (rear edge) of the rear spoiler 20 (lower member 22). In the lower member 222 of the second modified example, the fulcrum P3 is the second convex portion 62, so the buffer member 62a is preferably provided on the second convex portion 62. The buffer member 62a is disposed between the lower member 222 and the vehicle body 30, thereby reducing the impact between the lower member 222 and the vehicle body 30 and thereby protecting the lower member 222. In the above-described embodiment, the buffer member 62a is preferably provided at a location that can serve as the fulcrum P3 of the lower member 22.

[0072] The buffer member 62a is preferably formed of an elastic material such as rubber, synthetic resin, etc. Furthermore, the buffer member 62a may be provided on the first convex portion 61 instead of the second convex portion 62. In this case, the buffer member 62a may be provided at a location that serves as the fulcrum P3 of the first convex portion 61 (for example, the front end portion of the first convex portion 61).

[0073] (Third Modification) Furthermore, the lower member 122 according to the first modification described above may be provided with a relatively short first protrusion 361, as shown in FIG. 8 . The lower member 322 according to the third modification, like the lower member 122 described above, includes the first surface 22a, the second surface 22c, the third surface 22d, the step portion 122b, the multiple mounting bases 23, and the multiple first protrusions 361. While the first protrusions 61 described above are extended to the front end of the third surface 22d, the first protrusions 361 may be shortened to a position rearward of this (for example, the rear end of the third surface 22d). This allows the fulcrum P3, which was located at the front end of the third surface 22d, to be moved closer to the mounting base 23, i.e., the force point P1, and shortens the distance between the fulcrum P3 and the point of application P2. As a result, since the distance between the force point P1 and the action point P2 is the same, when the same force is applied to the force point P1, the load at the action point P2 can be reduced, thereby reducing the load on the mounting base 23 and improving its durability.

[0074] In the above-described embodiment and modified examples, it is preferable that the first convex portion 61 be as long as possible. This is for the following reason: when an external force acts on the rear spoiler 20 (when the rear end of the rear spoiler 20 is lifted upward), the lower member 22 is fixed to the upper member 21, and therefore the upper member 21 may warp. In this case, the reaction force caused by the warping of the upper member 21 is added to the load (reaction force) of the lower member 22. In order to be able to withstand this relatively large combined load, it is preferable that the first convex portion 61 be as long as possible. The warping of the upper member 21 occurs along the fore-and-aft direction of the vehicle. Since the first convex portion 61 is formed along the fore-and-aft direction, it is preferable that the reaction force range of the upper member 21 be set to the length of the reinforcing portion (first convex portion 61 and step portion 22b) formed along the fore-and-aft direction (see FIGS. 9A and 9B ). 9A and 9B, one end of the reaction force range of the upper member 21 is preferably set at a contact point (fulcrum P3) where an arbitrary point on the edge of the lower member 22 forward of the mounting base 23 comes into contact with the vehicle body 30 when the rear end of the rear spoiler 20 is lifted upward. The other end of the reaction force range of the upper member 21 is preferably set rearward of the step 22b. Also, Fig. 9A shows the reaction force range of the upper member 21 when the first convex portion 61 is relatively long, and Fig. 9B shows the reaction force range of the upper member 21 when the first convex portion 61 is relatively short.

[0075] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples and can be practiced in various forms with various modifications and improvements based on the knowledge of those skilled in the art.

[0076]

[0077] The lower member of Comparative Example 1 and the lower members 122 of Examples 1 and 2 shown in Table 1 were produced. The lower member of Comparative Example 1 has a step portion 122b but does not have a first protrusion 61, and there is no enclosure surrounding the mounting base 23. The lower member of Example 1 has a step portion 122b and either a first protrusion 61a or a first protrusion 61b, and the mounting base 23 is surrounded by an L-shaped enclosure. Furthermore, the lower member 122 of Example 2 has a step portion 122b and both a first protrusion 61a and a first protrusion 61b, and the mounting base 23 is surrounded by a U-shaped enclosure.

[0078] For the lower members (rear spoilers 20) of the examples and comparative examples, stress on the mounting base 23 was simulated (actually measured) and the load resistance was evaluated. Specifically, an external force was applied to the above-mentioned force point P1, and the stress just before the mounting base 23 broke was measured by simulation.

[0079] The stress in Table 1 is the average value for three samples. As is clear from Table 1, the stress of Comparative Example 1 was the highest, the stress of Example 1 was the next highest, and the stress of Example 2 was the lowest. That is, the load capacity of Comparative Example 1 was the lowest, the load capacity of Example 1 was higher than that of Comparative Example 1, and the load capacity of Example 2 was even higher than that of Example 1. In other words, it can be seen that Comparative Example 1, which has no enclosure, had the highest stress on the mounting base 23 and the lowest load capacity, while the greater the degree of enclosure, the smaller the stress can be suppressed and the larger the load capacity can be.

[0080] 20...Attachment object (rear spoiler), 22, 122, 222, 322...Lower member, 22b, 122b...Step portion, 22e...Convex rib portion, 23...Attachment portion (mounting base), 30...Attachment destination (vehicle body), 40...Fixing member (fastening member), 61...First convex portion, 62...Second convex portion.

Claims

1. An object to be attached to a mounting destination by a fixing member, a plurality of attachment portions that attach the attachment object to the attachment destination using the fixing member; a first protrusion provided on a straight line connecting the plurality of mounting portions; Equipped with The mounting portion is a holding opening for holding a held portion of the fixing member; an insertion opening that is provided in communication with the holding opening, opens toward the first protrusion, and allows the held portion to be inserted therethrough; An object to be attached that satisfies any of the following (A) to (D). (A) The first protrusions are provided parallel to one another on a straight line connecting the attachment portions. (B) the attachment object has a surface facing the attachment destination, a second surface on which the attachment portion is provided; a protruding step portion provided on one edge of the second surface; and a first surface connected to the step portion. (C) The attachment object has an attachment opening that opens toward the attachment portion. (D) The first protrusion is provided between adjacent mounting portions.

2. An object to be attached to a mounting destination by a fixing member, a plurality of attachment portions that attach the attachment object to the attachment destination using the fixing member; a first protrusion provided on a straight line connecting the plurality of mounting portions; Equipped with the first protrusions are formed in a pair and are opposed to each other with the mounting portion therebetween, An attachment object in which a pair of the first protrusions are respectively arranged on each of the attachment portions, and which satisfies any of the following (A) to (D). (A) The first protrusions are provided parallel to one another on a straight line connecting the attachment portions. (B) the attachment object has a surface facing the attachment destination, a second surface on which the attachment portion is provided; a protruding step portion provided on one edge of the second surface; and a first surface connected to the step portion. (C) The attachment object has an attachment opening that opens toward the attachment portion. (D) The first protrusion is provided between adjacent mounting portions.

3. An object to be attached to a mounting destination by a fixing member, a plurality of attachment portions that attach the attachment object to the attachment destination using the fixing member; a first protrusion provided on a straight line connecting the plurality of mounting portions; Equipped with the first protrusions are formed in a pair and are opposed to each other with the mounting portion therebetween, the attachment object includes a second protrusion that connects the first protrusion, the second protrusion protrudes from a surface on which the attachment portion is provided, An object to be attached that satisfies any of the following (A) to (D). (A) The first protrusions are provided parallel to one another on a straight line connecting the attachment portions. (B) the attachment object has a surface facing the attachment destination, a second surface on which the attachment portion is provided; a protruding step portion provided on one edge of the second surface; and a first surface connected to the step portion. (C) The attachment object has an attachment opening that opens toward the attachment portion. (D) The first protrusion is provided between adjacent mounting portions.

4. (delete)

5. (delete)

6. An object to be attached to a mounting destination by a fixing member, a plurality of attachment portions that attach the attachment object to the attachment destination using the fixing member; a first protrusion provided on a straight line connecting the plurality of mounting portions; Equipped with the first protrusions are formed in a pair and are opposed to each other with the mounting portion therebetween, the attachment object includes a second protrusion that connects the first protrusion, The mounting portion is surrounded in four directions, i.e., front, rear, left, and right, by convex portions including the first convex portion and the second convex portion, An object to be attached that satisfies any of the following (A) to (D). (A) The first protrusions are provided parallel to one another on a straight line connecting the attachment portions. (B) the attachment object has a surface facing the attachment destination, a second surface on which the attachment portion is provided; a protruding step portion provided on one edge of the second surface; and a first surface connected to the step portion. (C) The attachment object has an attachment opening that opens toward the attachment portion. (D) The first protrusion is provided between adjacent mounting portions.

7. An object to be attached to a mounting destination by a fixing member, a plurality of attachment portions that attach the attachment object to the attachment destination using the fixing member; a first protrusion provided on a straight line connecting the plurality of mounting portions; Equipped with the first protrusions are formed in a pair and are opposed to each other with the mounting portion therebetween, the attachment object includes a second protrusion that connects the first protrusion, The object to be attached, characterized in that a buffer member is provided on the surface of the second convex portion.

8. 2. The attachment object according to claim 1, wherein an inner wall surface of the holding opening has a protrusion formed thereon.

9. An object to be attached to a mounting destination by a fixing member, a plurality of attachment portions that attach the attachment object to the attachment destination using the fixing member; a first protrusion provided on a straight line connecting the plurality of mounting portions; Equipped with The object to be attached is characterized in that the height of the first protrusion is 1 / 4 to 1 / 2 of the height of the attachment portion.