JP2012067810A - Component mounting structure and push nut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component mounting structure which makes it possible to reduce production costs and to improve joining strength and ease of mounting.SOLUTION: In the component mounting structure, a second fastener 61 is pushed into a first fastener 41, and a component 3 is pinched and held by the first fastener 41 and the second fastener 61. A push nut 31 comprises: a plate body 32 shaped like a ring; a first engaging hook 33 which is formed on the inner side of the plate body 32 and is inclined in the center direction of an axial bore 35, as coming closer toward a bottom part 21a of a recess 21; and a second engaging hook 34 which is formed on the outer side of the plate body 32 and is inclined in the direction away from the center direction of the axial bore 35, as coming further away from the bottom part 21a of the recess 21. The tip end of the first fastener 41 engages with the first engaging hook 33, while the recess 21 engages with the second engaging hook 34.

Description

  The present invention relates to a component mounting structure for mounting a component to a mounted component. The present invention also relates to a push nut for attaching a second member to the first member.

  There is known a mounting structure in which a protector (hereinafter also referred to as “component”) for protecting a mounted component is attached to the outside of a fuel tank (hereinafter also referred to as “mounted component”) mounted on an automobile. Conventionally, when a part is attached to the attached part, the part is fixed to the protrusion provided on the attached part using a fastener. For example, Patent Document 1 discloses a technique for fixing a component to a mounting boss fixed to the mounted component using a leaf spring-like clip. Patent Document 2 discloses a technique for fixing a component by screwing a bolt to a nut fixed to the mounted component.

JP 2008-37230 A Japanese Patent No. 4034104

  In the invention according to Patent Document 1, it is possible to attach a part relatively easily via a clip, but since one side of the clip is notched, there is a problem that the clip is easily detached from the notch. Further, in the invention according to Patent Document 2, since it is screwed with a bolt, the component and the mounted component can be coupled relatively firmly, but there is a problem that the screwing operation becomes complicated. In other words, in the conventional invention, it has been difficult to achieve both improvement in bond strength and improvement in attachment.

  In addition, for example, when forming a mounted part by blow molding with a synthetic resin material, as described above, in order to provide a protrusion for fixing the part on the outer surface of the mounted part, it is by welding of a resin member or insert blow However, this method has the following problems.

  In the method by welding, since the shape of the attached part differs for each vehicle type, the attachment position of the fastener also differs for each vehicle type. Therefore, since a dedicated welding machine is required for each vehicle type, there is a problem that equipment costs and manufacturing costs increase. Furthermore, since the required physical properties are different between the welded part to the attached part and the locking part of the fastener, the two-color molding is performed with two kinds of resin materials. For this reason, there exists a problem that manufacturing cost increases. In addition, the method using insert blow molding has a problem in that work such as loading of inserts into a mold is time consuming and the number of manufacturing steps increases, resulting in increased manufacturing costs.

  The present invention was created to solve such problems, and an object of the present invention is to provide a component mounting structure capable of reducing the manufacturing cost and improving the bonding strength and the mounting property. . Moreover, an object of this invention is to provide the push nut which can aim at the improvement of coupling strength and attachment property.

  In order to solve the above-described problems, the present invention provides a mounted component having a recess on an outer surface, a component mounted on the outer surface of the mounted component, and an inner side of the component with respect to the mounted component. A first fastener, a second fastener that engages with the first fastener and is disposed outside the component, and a fastener that includes a push nut that is inserted through the tip of the first fastener. The push nut is a mounting structure for a component that pushes the second fastener against the first fastener and holds the component between the first fastener and the second fastener. Is a substrate having a shaft hole through which the tip of the first fastener is inserted, and a first engagement portion formed inside the substrate and inclined toward the center of the shaft hole toward the bottom of the recess. And formed on the outside of the substrate and away from the bottom of the recess A second engaging portion that is inclined in a direction away from the center of the shaft hole, and a tip end of the first fastener and the first engaging portion are engaged with each other, and the concave portion and the second engaging portion are engaged with each other. It is characterized in that the joint part is engaged.

According to such a configuration, since it is only necessary to provide a recess on the outer surface of the mounted part, it is possible to save the trouble of forming the mounted part. Thereby, manufacturing cost can be reduced. Moreover, components can be hold | maintained only by pushing in a 2nd fastener with respect to a 1st fastener. Thereby, attachment property can be improved.
Moreover, since the 1st engaging part and 2nd engaging part of a push nut incline in the center direction of a shaft hole, it can push in smoothly when attaching. On the other hand, when an external force is generated in the component, the first engagement portion engages with the first fastener and the second engagement portion engages with the recessed portion of the attached component. Thereby, bond strength can be raised.

  Moreover, it is preferable that a said 2nd engaging part has a some 2nd engaging claw. According to this structure, since the 2nd engaging part has a some 2nd engaging claw, it is easy to bend. Thereby, it can push in more smoothly at the time of attachment.

  Further, it is preferable that the distal end side of the second engagement claw is formed wider than the proximal end side. According to this configuration, the second engagement claw is more easily bent. Moreover, since the front end side is wide, the engagement part with a recessed part can be enlarged.

  Moreover, it is preferable that the said 2nd engagement nail | claw is formed with the curved part which becomes convex toward the bottom part of the said recessed part. According to this configuration, when an external force is applied to the push nut, the external force can be absorbed by the curved portion. Thereby, it becomes difficult for the push nut to come off from the recess.

  Moreover, it is preferable that a said 1st engaging part has a some 1st engaging claw. According to this structure, since the 1st engaging part has a some 1st engaging claw, it is easy to bend. Thereby, it can push in more smoothly at the time of attachment.

  Moreover, it is preferable to provide the protrusion which engages with the said 1st engaging part in the outer peripheral surface of the front-end | tip of said 1st fastener. According to such a configuration, it is possible to prevent the push nut from coming off from the tip of the first fastener.

Further, the first fastener is erected on the first head in a direction opposite to the first leg, a plate-shaped first head, a first leg erected on the first head, and the first leg. A cylindrical portion, a hollow portion formed across the first head, the first leg and the cylindrical portion, and an engagement hole formed in the cylindrical portion,
The second fastener has a plate-like second head, a second leg standing on the second head, and an engagement protrusion formed on the second leg, The bipod is preferably inserted into the hollow portion, and the engagement protrusion is engaged with the engagement hole.

  According to this configuration, the first fastener and the second fastener can be reliably engaged by including the engagement hole and the engagement protrusion.

  The first head includes a plate-like main body, a notch cut out to open outward in the main body, and an outer side from the center side of the first head in the notch. It is preferable that the blade member is inclined toward the second fastener side and biases the component toward the second fastener side.

  According to such a configuration, since the blade member urges the component toward the second fastener, it is possible to suppress rattling of the component.

  The second leg portion includes a base shaft portion standing on the second head portion and a pair of engagement members extending from the distal end side of the base shaft portion toward the second head portion and having the engagement protrusions. And the second head has an escape hole that is perforated on both sides of the base shaft portion and allows the tip of the engagement piece to escape, and the engagement piece is elastically deformed, It is preferable that the engagement protrusion is engaged with the engagement hole of the cylindrical portion.

  According to this structure, since the engagement piece provided with the engagement protrusion is elastically deformed, the first fastener and the second fastener can be easily engaged. Further, the first fastener and the second fastener can be disengaged by elastically deforming them by pinching the tips of the pair of engagement pieces from the escape holes. Thereby, a 2nd fastener can be easily removed from a 1st fastener.

  Further, the present invention is a push nut for attaching the second member to the recess formed in the first member, the substrate having a shaft hole through which the second member is inserted, and formed inside the substrate. The first engaging portion that inclines toward the center of the shaft hole as it goes toward the bottom of the recess, and the direction that is formed outside the substrate and moves away from the center of the shaft hole as it moves away from the bottom of the recess. A second engaging portion that is inclined to the second engaging portion, wherein the second member and the first engaging portion engage with each other, and the concave portion and the second engaging portion engage with each other. .

  According to such a configuration, it is only necessary to provide a recess on the outer surface of the first member, so that the trouble of forming the first member can be saved. Thereby, manufacturing cost can be reduced. Moreover, a 2nd member can be attached to a 1st member only by pushing a push nut and a 2nd member with respect to a recessed part. Thereby, attachment property can be improved.

  Moreover, since the 1st engaging part and 2nd engaging part of a push nut incline in the center direction of a shaft hole, it can push in smoothly when attaching. On the other hand, when an external force is generated in the second member, the first engagement portion engages with the second member, and the second engagement portion engages with the recess of the first member. Thereby, bond strength can be raised.

  According to the component mounting structure and the push nut according to the present invention, the manufacturing cost can be reduced, and the coupling strength and the mounting property can be improved.

It is a figure which shows the attachment structure of the components which concern on 1st embodiment, Comprising: It is a perspective view which faces from the back side of a vehicle. It is sectional drawing which shows the attachment structure of the components which concern on 1st embodiment. It is an exploded sectional view showing the structure around the fastener concerning a first embodiment. It is a figure which shows the push nut which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is a top view. It is a figure which shows the 1st fastener which concerns on 1st embodiment, Comprising: (a) is sectional drawing, (b) is a perspective view. It is a figure which shows the 2nd fastener which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is sectional drawing. It is sectional drawing which shows the attachment method of the component which concerns on 1st embodiment in steps. It is sectional drawing which shows the engagement state of the fastener which concerns on 1st embodiment. It is sectional drawing which shows a 1st modification. It is a figure which shows a 2nd modification, Comprising: (a) is a perspective view, (b) is sectional drawing. It is a disassembled sectional view which shows the structure around the fastener concerning 2nd embodiment. It is a figure which shows the recessed part which concerns on 2nd embodiment, Comprising: (a) is a perspective view, (b) is sectional drawing. It is a figure which shows the push nut which concerns on 2nd embodiment, Comprising: (a) is a perspective view, (b) is sectional drawing. It is a figure which shows the 1st fastener which concerns on 2nd embodiment, Comprising: (a) is a perspective view, (b) is a side view. It is sectional drawing which shows the engagement state of the fastener which concerns on 2nd embodiment.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings as appropriate. As shown in FIG. 1, the component mounting structure 1 according to this embodiment includes a mounted component 2, a component 3 that covers the outside of the mounted component 2, and a plurality of fasteners that fasten the component 3 to the mounted component 2. It has mainly the tool 4 and the two tank bands 5 which hold | maintain the to-be-attached component 2 and the component 3 from the outside. In the component mounting structure 1 according to this embodiment, a case where a plate-shaped protector (component 3) is mounted on a fuel tank (mounted component 2) disposed in a vehicle is illustrated.

  As shown in FIGS. 1 and 2, the mounted component 2 is a fuel tank that is formed by blow molding using a synthetic resin material and has a multilayer structure in which a thermoplastic resin is laminated inside and outside a barrier material layer. Although the arrangement position of the mounted component 2 is not particularly limited, in the present embodiment, it is held (suspended) via tank bands 5 and 5 on the back side of the chassis S of the vehicle. The mounted component 2 is a flat housing, and its outer surface is appropriately formed with irregularities in consideration of the structure and strength of the vehicle. Two recesses 2a and 2a for inserting the tank bands 5 and 5 are formed on the outer surface of the mounted component 2. Moreover, the recessed part 21 which the fastener 4 mentioned later engages is formed in the outer surface of the to-be-attached component 2. As shown in FIG. The configuration of the recess 21 will be described later.

  The mounted component 2 is disposed such that its longitudinal direction is the vehicle width direction and its short direction is the vehicle front-rear direction. In the following description, front / rear, left / right, and upper / lower directions follow the arrows in FIG.

  As shown in FIGS. 1 and 2, the component 3 is a protector that shields heat from the exhaust pipe and other devices and protects the mounted component 2 from an external force in the present embodiment. The component 3 is a plate member made of metal or resin, and substantially covers the lower side of the mounted component 2. The component 3 is formed along the shape of the outer surface of the mounted component 2. The component 3 is attached to the mounted component 2 via a plurality of fasteners 4 to be described later, and is held on the vehicle together with the mounted component 2 by the tank band 5.

  As shown in FIGS. 2 and 3, the component 3 is formed with two recesses 3a and 3a and a plurality of through holes 3b. The recess 3 a is a part through which the tank band 5 is inserted, and is formed corresponding to the recess 2 a of the mounted component 2. The through hole 3b is a part into which the fastener 4 is inserted. In this embodiment, the through holes 3b are formed in nine places according to the number of the fasteners 4. In the present embodiment, the component 3 is formed as described above. However, the shape, material, and the like of the component 3 are not particularly limited as long as the component 3 is protected.

  As shown in FIGS. 2 and 3, the fastener 4 passes through the through hole 3 b of the component 3 and fastens the component 3 to the mounted component 2 from the outside (lower side) of the component 3. The fastener 4 and its mounting structure will be described later.

  As shown in FIGS. 1 and 2, the tank band 5 is a member that holds the mounted component 2 and the component 3 on the vehicle. In this embodiment, the tank band 5 is stretched over two strips across the front-rear direction of the mounted component 2. The tank band 5 is provided with fastening portions 5a and 5a at both ends thereof, and is fastened with bolts to the vehicle chassis S or the like via the fastening portions 5a. In this embodiment, the tank band 5 uses a resin member, but the material is not particularly limited.

  By providing the tank band 5, it is possible to hold the mounted component 2 and the component 3 on the vehicle, and to prevent a position shift of the component 3 with respect to the mounted component 2. In addition, the mounted component 2 includes the recesses 2a and 2a, and the component 3 includes the recesses 3a and 3a, so that the positioning of the mounted component 2 and the component 3 and the mounting operation of the tank band 5 can be easily performed. . Further, by providing the recess 2 a of the mounted part 2 and the recess 3 a of the part 3, it is possible to prevent the tank band 5 from protruding below the lowermost surface of the part 3.

  Next, the recessed part 21, the fastener 4, and these attachment structures are explained in full detail. As shown in FIG. 3, the fastener 4 includes a push nut 31, a first fastener 41, and a second fastener 61 that are separated from each other, and the first fastener 41, the second fastener 61, and the like. Then, the component 3 is inserted into the recessed portion 21 of the mounted component 2 while sandwiching the component 3.

  As shown in FIG. 3, the recess 21 is provided in the outer surface of the attached component 2. The recess 21 is formed when the attached component 2 is blow-molded. In the present embodiment, the recess 21 is open downward (outside the mounted part 2) and is punched into a bowl shape. The shape, size, etc. of the recess 21 are not particularly limited.

  As shown in FIGS. 3 and 4, the push nut 31 is a metal member having a flat ring shape. The push nut 31 is installed in the recess 21 while being inserted through the tip of the first fastener 41. The push nut 31 includes a substrate 32, a first engagement claw (first engagement portion) 33 formed inside the substrate 32, and a second engagement claw (second engagement) formed outside the substrate 32. Part) 34. The push nut 31 is formed by pressing a plate-shaped metal member and then bending the portions that become the first engagement claw 33 and the second engagement claw 34. A shaft hole 35 is formed in the center of the substrate 32. The shaft hole 35 is a part through which the first fastener 41 is inserted.

  The board | substrate 32 is a plate-shaped member which exhibits a ring shape. A first engagement claw 33 is formed on the inner edge 32 a of the substrate 32. As shown in FIG. 3, the first engaging claw 33 is formed on the inner edge 32 a of the substrate 32 and is inclined so as to approach the center C of the shaft hole 35 toward the bottom 21 a of the recess 21. As shown in FIG. 4, the first engagement claw 33 is formed with a plurality of first slit portions 33 a having a substantially V shape in plan view in a radial pattern. The first slit portions 33a are formed at equal intervals, and the gap increases as the center C of the shaft hole 35 is approached. Note that the size and number of the first slit portions 33a are not particularly limited.

  As shown in FIG. 3, a second engagement claw 34 is formed on the outer edge 32 b of the substrate 32. The second engaging claw 34 is formed on the outer edge 32 b of the substrate 32 and is inclined so as to be separated from the center C of the shaft hole 35 as it is separated from the bottom 21 a of the recess 21. That is, the first engagement claw 33 and the second engagement claw 34 are inclined in the same direction. As shown in FIG. 4, the second engagement claw 34 is formed with a plurality of second slit portions 34 a having a substantially V shape in a plan view in a radial pattern. The second slit portions 34a are formed at equal intervals, and the gap increases as the distance from the center C of the shaft hole 35 increases. The size and number of the second slit portions 34a are not particularly limited.

  In the present embodiment, the claw-shaped first engagement claw 33 is illustrated as the first engagement portion, and the claw-shaped second engagement claw 34 is illustrated as the second engagement portion. It is not limited. While the first engagement portion engages with the first fastener 41 and the second engagement portion engages with the recess 21, another form may be adopted. For example, in the above-described form, the first slit portion 33a and the second slit portion 34a may not be provided.

  As shown in FIG. 3, the first fastener 41 includes a first head 42, a first leg 43 erected from the first head 42 toward the recess 21, and a part 3 side from the first head 42. And a hollow portion 45 formed inside. The first fastener 41 is disposed between the attached component 2 and the component 3. The material of the first fastener 41 is not particularly limited, but resin is used in the present embodiment.

  As shown in FIGS. 3 and 5 (a) and (b), the first head portion 42 is a plate-like member and is formed larger than the outer diameter of the through hole 3b of the component 3. . The first head portion 42 includes a thick portion 49, a pair of thin portions 47 and 48 formed around the thick portion 49, and a concave groove 46 formed between the thin portions 47 and 48.

  The thick part 49 is formed in a ring shape. The thick portion 49 has an inner surface 49a located on the inner side with respect to the attached component 2 and an outer surface 49b located on the outer side. Further, as shown in FIG. 5B, a thickening portion 49 is formed with a thinning hole 49c penetrating in the vertical direction. In the present embodiment, four lightening holes 49c are provided around the first leg 43. The first head 42 can be reduced in weight by the lightening hole 49c.

  The thin portion 47 is extended and inclined upward from the upper end of the outer edge over the entire circumference of the thick portion 49. That is, the inner surface (upper surface) 47 a of the thin portion 47 is inclined upward with respect to the inner surface (upper surface) 49 a of the thick portion 49. In other words, the thin portion 47 extends in the radial direction from the inner surface 49 a of the thick portion 49 and is inclined inward (attached component 2 side) from the inner surface 49 a of the thick portion 49. Further, the thin portion 47 is formed so as to be gradually thinner as it is separated from the center of the first head portion 42.

  The thin portion 48 is extended downwardly from the lower end of the outer edge over the entire circumference of the thick portion 49. That is, the outer surface (lower surface) 48 a of the thin portion 48 is inclined downward with respect to the outer surface (lower surface) 49 b of the thick portion 49. In other words, the thin-walled portion 47 extends in the radial direction from the outer surface 49b of the thick-walled portion 49 and is inclined outward (in the direction away from the mounted component 2) from the outer surface 49b of the thick-walled portion 49. . Further, the thin portion 48 is formed so as to be gradually thinner as it is separated from the center of the first head portion 42.

  The concave groove 46 is formed in a concave shape toward the center of the first head 42 over the entire circumference of the first head 42. As described above, since the outer edge side of the first head portion 42 includes the pair of thin portions 47 and 48, it can be bent when an external force is applied. That is, the thin-walled portions 47 and 48 are deformed in a direction in which the distance between the thin portions 47 and 48 is reduced when an external force is applied, and are restored to the original state when the external force is lost.

  The first leg 43 is erected at the center of the first head 42. The first leg portion 43 includes a large diameter portion 51 and a small diameter portion 52. The large diameter portion 51 is erected on the first head portion 42 and has a hollow portion therein. The outer diameter of the large diameter portion 51 is smaller than the inner diameter of the recess 21.

  The small diameter portion 52 is formed concentrically with the large diameter portion 51. The small diameter portion 52 is erected on the upper surface 51a of the large diameter portion 51 and has a cylindrical shape. The outer diameter of the small diameter portion 52 is slightly smaller than the diameter of the shaft hole 35 of the push nut 31. Four protrusions 52 b are provided on the outer peripheral surface 52 a of the small diameter portion 52. The protrusion 52 b is a part that prevents the push nut 31 from coming off from above the small diameter portion 52. In the present embodiment, the protrusion 52b is formed in a cross-sectional triangle. The number and shape of the protrusions 52b are particularly limited as long as the push nut 31 can be inserted below the protrusion 52b and the push nut 31 does not come out from above the small diameter portion 52. It is not a thing.

  The cylindrical portion 44 has a ring shape and is erected downward from the first head portion 42. The cylindrical part 44 is a part for positioning the component 3 and receiving the second fastener 61. A pair of engaging holes 44 a penetrating in the left-right direction is formed on the opposite side surfaces of the cylindrical portion 44.

  As shown in FIG. 5A, the hollow portion 45 is formed continuously inside the large diameter portion 51, the first head portion 42, and the cylindrical portion 44. The hollow part 45 is a part into which the second leg part 63 of the second fastener 61 is inserted.

  Although the first fastener 41 is formed as described above in the present embodiment, other forms may be used. For example, it is not necessary to provide the thin portions 47 and 48 in the first fastener 41.

  As shown in FIG. 3, the second fastener 61 has a second head portion 62 and a second leg portion 63 erected upward from the second head portion 62. The second fastener 61 is disposed on the lower side (outside) of the component 3. Although there is no restriction | limiting in particular about the material of the 2nd fastener 61, In this embodiment, the material excellent in fire resistance and heat resistance than the 1st fastener 41 is used.

  As shown in FIGS. 3 and 6 (a) and 6 (b), the second head 62 is a member having a substantially disk shape, and is formed so that the surface facing the component 3 is recessed in the center. Yes. The outer diameter of the second head 62 is substantially the same as the outer diameter of the thick portion 49 of the first fastener 41. In the second head 62, a pair of escape holes 65 and four convex portions 66 are formed. The escape hole 65 is a through hole for allowing an engagement piece 68 to be described later to escape. The escape holes 65 are formed on both sides of the base shaft portion 67 of the second leg portion 63 described later. In the present embodiment, the escape hole 65 is formed to have a rectangular shape in plan view, but may have another shape. In the present embodiment, four convex portions 66 are provided, and are arranged around the second leg portion 63 at equal intervals.

  As shown in FIGS. 6A and 6B, the second leg portion 63 includes a base shaft portion 67 and a pair of engagement pieces 68 extending from the base shaft portion 67. The base shaft portion 67 is erected at the center of the second head 62. The proximal end side of the engagement piece 68 is connected to the distal end of the base shaft portion 67, and the distal end (lower end) side serving as a free end faces the escape hole 65. The engaging piece 68 is formed to be slightly curved so as to swell in a direction away from the base shaft portion 67. The engaging piece 68 is elastically deformed in a direction approaching the base shaft portion 67 when an external force is applied to the distal end (lower end) of the engaging piece 68 in the direction of the base shaft portion 67, and is restored to its original position when the external force is removed. To do.

  On the side surfaces of the pair of engagement pieces 68, engagement protrusions 68 a that protrude in a direction away from the base shaft portion 67 are formed. The shape of the engagement protrusion 68a is not particularly limited, but in the present embodiment, the engagement protrusion 68a is formed in a sectional view triangle. The engagement protrusion 68a is a portion that is engaged with the engagement hole 44a of the cylindrical portion 44 described above.

  In addition, although the 2nd fastener 61 was formed as mentioned above in this embodiment, another form may be sufficient. For example, the protrusion 66 may not be provided on the second fastener 61.

Next, a method for attaching the component 3 will be described.
First, as shown in FIG. 7A, the push nut 31 is inserted into the small diameter portion 52 of the first fastener 41. That is, the small diameter portion 52 is inserted from the second engagement claw 34 side of the push nut 31, and the substrate 32 is brought into contact with the upper surface of the large diameter portion 51. The first engaging claw 33 is slightly expanded by the small diameter portion 52 and abuts on the outer peripheral surface 52a of the small diameter portion 52 at a position below the protrusion 52b (on the large diameter portion 51 side).

  Next, as shown in FIG. 7B, the first fastener 41 provided with the push nut 31 is pushed into the recess 21 of the attached component 2. The second engagement claw 34 is slightly reduced in diameter by the inner wall of the recess 21 when pressed, and comes into contact with the inner wall. Further, the first head 42 of the first fastener 41 abuts on the outer surface of the attached component 2. Next, the through hole 3 b of the component 3 is inserted through the cylindrical portion 44 of the first fastener 41.

  Finally, as shown in FIG. 7C, the second fastener 61 is pushed into the first fastener 41 to engage the first fastener 41 and the second fastener 61. Since the part 3 is clamped by the first fastener 41 and the second fastener 61, the part 3 can be attached to the attached part 2.

  The method for attaching the component 3 is not limited to the method described above. For example, after the push nut 31, the first fastener 41, the component 3, and the second fastener 61 are integrated in advance, the integrated member may be pushed into the recess 21 and attached.

  Next, the engagement state of the fastener 4 will be described with reference to FIG. As shown in FIG. 8, the distal end side of the engagement piece 68 of the second fastener 61 is pushed by the inner wall of the cylindrical portion 44 of the first fastener 41 and moves toward the base shaft portion 67 when being pushed. . When the engagement protrusion 68a of the engagement piece 68 is pushed to a position facing the engagement hole 44a of the cylindrical portion 44, the engagement piece 68 is restored to its original state, thereby being engaged with the engagement protrusion 68a. The hole 44a engages. Thereby, the first fastener 41 and the second fastener 61 are engaged, and the component 3 is sandwiched.

  When the second fastener 61 is removed from the first fastener 41, for example, a finger is inserted into the escape holes 65, 65 of the second fastener 61, and the tips of the engagement pieces 68, 68 are moved to the base shaft 67 side. Then, the engagement between the engagement hole 44a of the cylindrical portion 44 and the engagement protrusion 68a of the engagement piece 68 is released. Then, the second fastener 61 is pulled out in a direction away from the first fastener 41. Thereby, the 2nd fastener 61 and the components 3 can be removed from the 1st fastener 41. FIG.

  According to the component mounting structure 1 described above, since it is only necessary to provide the recess 21 on the outer surface of the mounted component 2, it is possible to simplify the structure of the mold during blow molding and to form the mounted component 2 Can be omitted. Thereby, since it is not necessary to perform the work of welding a boss or the like and the troublesome work such as insert blow as in the prior art, the manufacturing cost can be reduced.

  Moreover, the component 3 can be hold | maintained only by pushing the 2nd fastener 61 with respect to the 1st fastener 41 which let the push nut 31 penetrate. Thereby, attachment property can be improved.

  Further, since the first engagement claw 33 and the second engagement claw 34 of the push nut 31 are inclined so as to approach the center C of the shaft hole 35 toward the bottom 21 a of the recess 21, the push nut 31 is When attaching to the 1st fastener 41, and pushing the 1st fastener 41 provided with the push nut 31 in the recessed part 21, an operation | work can be performed smoothly.

  On the other hand, for example, when an external force is generated in a direction away from the mounted component 2 with respect to the component 3, the first engagement claw 33 is applied to the small diameter portion 52 of the first fastener 41 and the second engagement claw 34 is applied to the component 3. It engages so that it may bite into the recessed part 21 of the attachment component 2, respectively. Thereby, bond strength can be raised.

  Further, since the first engagement claw 33 of the push nut 31 is provided with the first slit 33a, the first engagement claw 33 is easily bent, and the small diameter portion 52 of the first fastener 41 is inserted into the shaft hole 35 of the push nut 31. Easy to insert. Further, since the second engagement claw 34 of the push nut 31 is provided with the second slit portion 34 a, the second engagement claw 34 is easily bent, and the push nut 31 is easily inserted into the recessed portion 21 of the mounted part 2.

  Moreover, since the protrusion 52b was formed in the outer peripheral surface 52a of the small diameter part 52 of the 1st fastener 41, it can prevent that the push nut 31 comes off from the small diameter part 52 (front-end | tip) of the 1st fastener 41. FIG.

  Moreover, since the engagement hole 44a was provided in the 1st fastener 41 and the engagement protrusion 68a was each provided in the 2nd fastener 61, the 1st fastener 41 and the 2nd fastener 61 can be engaged reliably. . Further, since the engagement piece 68 is formed to be elastically deformable with respect to the base shaft portion 67, the engagement hole 44a and the engagement piece 68 can be easily engaged. Moreover, since the engaging piece 68 is elastically deformed by picking the pair of engaging pieces 68, the second fastener 61 and the component 3 can be easily removed.

  Moreover, since the thin parts 47 and 48 are formed in the 1st fastener 41, the outer edge side of the 1st head 42 becomes easy to bend. Since the concave portion 21, the component 3, and the fastener 4 of the mounted component 2 are subjected to molding distortion, the component 3 may rattle with respect to the mounted component 2 due to dimensional tolerance of the product. Moreover, the attachment operation | work of the components 3 may become difficult. However, according to the present embodiment, the thin portions 47 and 48 are bent to deform following the shape of the mounted part 2 and the like. Thereby, since the dimensional tolerance of each member is absorbed, it can assemble stably. Moreover, the attachment property of the fastener 4 can be improved because the thin parts 47 and 48 bend. Further, since the thin portions 47 and 48 are formed on the upper side and the lower side of the thick portion 49, they can be bent according to both members on the attached component 2 side and the component 3 side.

[First modification]
Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. FIG. 9 is a cross-sectional view showing a first modification. The first modification shown in FIG. 9 is different from the above-described embodiment in that the projection claw 21b is provided in the recess 21 of the mounted component 2.

  The protrusion claw 21 b is formed on the inner wall of the recess 21 so as to protrude in the center direction of the recess 21. In this embodiment, the protrusion claw 21b is provided over the entire inner circumference of the recess 21. By providing the projection claw 21b, the second engagement claw 34 is easily caught on the projection claw 21b. Thereby, when external force generate | occur | produces in the components 3, since the 1st fastener 41 cannot remove easily, coupling force can be raised more.

[Second modification]
10A and 10B are diagrams showing a second modification, in which FIG. 10A is a perspective view, and FIG. 10B is a cross-sectional view. In the above-described embodiment, the protector is exemplified as the component. However, in the second modification, the base plate of the tube holder 101 for attaching the tube P as the component is illustrated.

  As shown in FIG. 10A, the tube holder 101 is a member for attaching a tube P such as a vapor return tube to the attached component 2 (fuel tank), for example. The tube holder 101 includes a component (base plate) 102 and a pair of clamp clips 103 and 103 erected on the component 102.

  The component (base plate) 102 is formed with a through hole 104 through which the fastener 4 is inserted, as shown in FIG. The clamp clip 103 has a U-shape in side view, and can hold the tube P by pushing the tube P from the open side.

  As shown in FIG. 10B, the component 102 is inserted into the second fastener 61 through the through hole 104 and is sandwiched between the first fastener 41 and the second fastener 61. Thus, even the component 102 (base plate) can be easily attached by the fastener 4.

<Other variations>
In the above-described embodiment, the push nut 31 is used as a part of the fastener 4, but the component may be attached only by the push nut 31. For example, referring to FIG. 7B, the first fastener 41 (second member) can be attached to the recess 21 formed in the attached component 2 (first member) via the push nut 31. . Here, the first member is the fuel tank and the second member is the first fastener, but it goes without saying that other members may be used.

  According to such a configuration, it is only necessary to provide the recess 21 on the outer surface of the first member, so that the trouble of forming the first member can be saved. Thereby, manufacturing cost can be reduced. Further, the second member can be attached to the first member simply by pushing the push nut 31 and the second member into the recess 21. Thereby, attachment property can be improved.

  Moreover, since the 1st engagement nail | claw 33 and the 2nd engagement nail | claw 34 of the push nut 31 are inclined toward the center part of an axial hole as it goes to the bottom part 21a of the recessed part 21, it pushes in smoothly when attaching. Can do. On the other hand, when an external force is generated in the second member, the first engagement claw 33 engages with the second member and the second engagement claw 34 engages with the recess 21 of the first member. Thereby, bond strength can be raised.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. As shown in FIG. 11, the second embodiment is different from the first embodiment in the form of the recess 221, the push nut 231 of the fastener 204, and the first fastener 241.

  A fastener 204 according to the second embodiment includes a push nut 231, a first fastener 241, and a second fastener 261, and the first fastener 241 and the second fastener 261 are used to connect the component 203. It is inserted into the recessed portion 221 of the attached component 202 while being sandwiched. Detailed description of portions common to the first embodiment is omitted.

  As shown in FIGS. 12A and 12B, the recess 221 is recessed on the outer surface of the mounted part 202. The recess 221 is formed when the attached part 202 is blow-molded. In the present embodiment, the recess 221 opens downward (outside the mounted part 2) and is cut into a bowl shape.

  Projecting claws 221 b are formed on the inner wall of the recess 221. The protrusion claw 221b is formed so as to protrude in the center direction of the recess 221. In the present embodiment, three protrusion claws 221b are provided at equal intervals. By providing the projection claw 221b, a second engagement claw 234 described later is easily caught on the projection claw 221b. Thereby, when external force generate | occur | produces in the component 203, since the 1st fastener 241 is hard to remove | deviate, a coupling force can be raised more.

  As shown in FIGS. 13A and 13B, the push nut 231 is a metal member having a flat ring shape. The push nut 231 is installed in the recess 221 while being inserted through the tip of the first fastener 241. The push nut 231 includes a substrate 232, a first engagement claw (first engagement portion) 233 formed inside the substrate 232, and a second engagement claw (second engagement) formed outside the substrate 232. Part) 234.

  The substrate 232 is a plate-like member having a ring shape. A shaft hole 235 is formed in the center of the substrate 232. As shown in FIG. 13B, the substrate 232 has a first curved portion 232 a that protrudes toward the large diameter portion 251 while being in contact with the large diameter portion 251 of the first fastener 241, and a large diameter portion 251. And a flat plate portion 232b disposed at a position away from the flat plate portion. The first curved portion 232a is formed outside the flat plate portion 232b.

  As shown in FIGS. 11 and 13, the first engagement claw 233 is formed at the inner edge of the flat plate portion 232 b and is inclined so as to approach the center C of the shaft hole 235 toward the bottom portion 221 a of the recess 221. . As shown in FIG. 13A, the first engagement claw 233 is formed with a plurality of first slit portions 233a cut radially. The number of first slit portions 233a is not particularly limited, but is formed at four locations in the present embodiment.

  As shown in FIGS. 11 and 13, the second engagement claw 234 is formed on the outer edge of the first curved portion 232 a, and is separated from the center C of the shaft hole 235 as it is separated from the bottom portion 221 a of the recess 221. Inclined. That is, the first engagement claw 233 and the second engagement claw 234 are inclined in the same direction. As shown to (a) of FIG. 13, the 2nd engagement nail | claw 234 is formed with the some 2nd slit part 234a cut radially. The number of the second slit portions 234a is not particularly limited, but is formed at eight locations in the present embodiment. The second slit part 234a is cut out at equal intervals, and the outer side is narrower than the inner side. Thereby, as for the 2nd engagement nail | claw 234, the front end side is wide compared with the base end side.

  As illustrated in FIG. 13B, the second engagement claw 234 is formed with a second curved portion 234 b that is convex toward the bottom 221 a side of the recess 221. When an external force is applied to the push nut 231, the first bending portion 232 a and the second bending portion 234 b are bent to absorb the force.

  As shown in FIG. 14, the first fastener 241 includes a first head 242, a first leg 243 standing on the first head 242, and a first leg 243 on the first head 242. It has the cylindrical part 244 standingly arranged on the opposite side, and the hollow part 245 formed in the inside.

  The first head 242 includes a main body portion 246 that has a substantially disc shape, a notch portion 247 that is cut out in the main body portion 246, and a blade member 248 that is disposed in the notch portion 247. The notch 247 has a rectangular shape in plan view and is open toward the outside. In the present embodiment, four notches 247 are formed radially.

  The blade members 248 are respectively provided inside the notches 247 and project outward from the center side of the first fastener 241. The tip of the blade member 248 is a free end. As shown in FIG. 14B, the blade member 248 is inclined downward (in the cylindrical portion 244 side). A lower end 248 b of the blade member 248 is positioned below the lower surface 246 b of the main body 246. Note that the numbers of the notches 247 and the blade members 248 are not particularly limited.

  The first leg 243 is erected at the center of the first head 242. The first leg portion 243 has a large diameter portion 251 and a small diameter portion 252. The large-diameter portion 251 stands on the first head 242 and has a hollow portion inside. The outer diameter of the large diameter portion 251 is smaller than the inner diameter of the recess 221.

  The small diameter part 252 is formed concentrically with the large diameter part 251. The outer diameter of the small diameter portion 252 is slightly smaller than the diameter of the shaft hole 235 of the push nut 231.

  As shown in FIG. 14B, the cylindrical portion 244 has a ring shape and is erected downward from the first head 242. The cylindrical part 244 is a part for positioning the component 203 and receiving the second fastener 261. A pair of engagement holes 244a penetrating in the left-right direction are formed on the opposite side surfaces of the cylindrical portion 244.

  As shown in FIG. 14B, the hollow portion 245 is formed continuously inside the large diameter portion 51, the small diameter portion 52, the first head portion 242 and the cylindrical portion 244. The hollow part 245 is a part into which the second leg part 263 of the second fastener 261 is inserted.

  Since the second fastener 261 and the component 203 are the same as those in the first embodiment, detailed description thereof is omitted. Moreover, since the attachment procedure and removal procedure of the fastener 204 are substantially the same as those in the first embodiment, the description thereof is omitted.

  Next, the engagement state of the fastener 204 will be described with reference to FIG. As shown in FIG. 15, the component 203 is attached to the recess 221 while being sandwiched between the first fastener 241 and the second fastener 261 by a structure substantially equivalent to the first embodiment. Further, when an external force is generated in the component, the first engagement claw 233 of the push nut 231 engages with the first fastener 241 and the second engagement claw 234 engages with the recess 221. Thereby, bond strength can be raised.

  According to the second embodiment described above, the following effects can be achieved in addition to the effects substantially the same as those of the first embodiment. Since the blade member 248 of the first fastener 241 is inclined downward (on the second fastener 261 side) from the main body 246, the first fastener 241 and the second fastener 261 are sandwiched between the parts 203. The component 203 is urged toward the second fastener 261 by the blade member 248. Thereby, rattling of the component 203 can be suppressed.

  Moreover, since the projection claw 221b is formed in the concave portion 221, the second engagement claw 234 is easily caught on the projection claw 221b. Thereby, the coupling force of the fastener 204 can be increased.

  Further, the second engagement claw 234 of the push nut 231 has a wider tip end side than the base end side, so that the second engagement claw 234 is easily bent. Thereby, the fastener 204 can be attached smoothly. Moreover, since the front end side is wide, the engagement part with the recessed part 221 can be enlarged. Thereby, bond strength can be raised.

  Further, when an external force is applied to the component 203, the push nut 231 is difficult to be removed from the recess 221 because the external force can be absorbed by the first curved portion 232 a and the second curved portion 234 b of the push nut 231. In the present embodiment, the first bending portion 232a and the second bending portion 234b are provided, but external force can be absorbed as long as at least the second bending portion 234b is provided.

  Although the embodiments of the present invention have been described above, modifications can be made as appropriate without departing from the spirit of the present invention. For example, in this embodiment, the component is disposed below or above the attached component and fastened with a fastener, but the component may be disposed on the side of the attached component and fastened with the fastener. Moreover, in a to-be-attached component and components, you may form so that the position which attaches a fastener may be depressed and a fastener may accommodate in the hollow. Thereby, it can prevent that a fastener protrudes below from the lowermost surface of an accessory. Further, in the above-described embodiments and modifications, the protector and the base plate are exemplified as the parts. However, the parts are attached to the outside of the attached part, and other members are provided as long as they have a form that can be clamped by a fastener. It may be.

1 Parts mounting structure 2 Parts to be mounted (fuel tank)
3 parts (protector, base plate)
4 Fastener 5 Tank Band 21 Recess 21a Bottom 21b Projection Claw 31 Push Nut 32 Substrate 33 First Engagement Claw (First Engagement Part)
33a First slit portion 34 Second engagement claw (second engagement portion)
34a 2nd slit part 35 Shaft hole 41 1st fastener 42 1st head 43 1st leg part 44 Cylindrical part 44a Engagement hole 45 Hollow part 52b Projection 61 2nd fastener 62 2nd head 63 2nd Leg portion 65 Escape hole 67 Base shaft portion 68 Engagement piece 68a Engagement protrusion 231 Push nut 232 Substrate 232a First bending portion 233 First engagement claw (first engagement portion)
233a First slit portion 234 Second engagement claw (second engagement portion)
234a Second slit portion 234b Second curved portion 235 Shaft hole 246 Main body portion 247 Notch portion 248 Blade member

Claims (10)

A mounted part having a recess on the outer surface;
A part attached to the outer surface of the attached part;
A first fastener disposed on the inside of the component with respect to the mounted component; a second fastener disposed on the outside of the component that engages with the first fastener; and the first fastener A fastener comprising a push nut inserted through the tip, and
It is an attachment structure for a component that pushes the second fastener against the first fastener and holds the component between the first fastener and the second fastener,
The push nut is
A substrate having a shaft hole through which the tip of the first fastener is inserted;
A first engagement portion that is formed on the inner side of the substrate and is inclined toward the center of the shaft hole as it goes toward the bottom of the recess;
A second engagement portion that is formed outside the substrate and is inclined in a direction away from the center of the shaft hole as it is away from the bottom of the recess.
A mounting structure for a component, wherein the tip end of the first fastener and the first engaging portion are engaged, and the concave portion and the second engaging portion are engaged.   The component mounting structure according to claim 1, wherein the second engagement portion includes a plurality of second engagement claws.   The component mounting structure according to claim 2, wherein the second engagement claw is formed wider at a distal end side than at a proximal end side.   4. The component mounting structure according to claim 2, wherein the second engaging claw is formed with a curved portion that is convex toward the bottom of the concave portion. 5.   The component mounting structure according to any one of claims 1 to 4, wherein the first engagement portion includes a plurality of first engagement claws.   6. The component according to claim 1, further comprising a protrusion that engages with the first engagement portion on an outer peripheral surface of a tip of the first fastener. Mounting structure. The first fastener includes a plate-shaped first head, a first leg standing on the first head, and a cylindrical shape standing on the first head in a direction opposite to the first leg. A hollow portion formed over the first portion, the first head portion, the first leg portion, and the tubular portion, and an engagement hole formed in the tubular portion,
The second fastener has a plate-like second head, a second leg standing on the second head, and an engagement protrusion formed on the second leg,
The said 2nd leg part is inserted in the said hollow part, and the said engaging protrusion is engaged with the said engagement hole, The Claim 1 thru | or 6 characterized by the above-mentioned. Part mounting structure. The first head includes a plate-shaped main body, a notch cut out to open outwardly in the main body, and an outside protruding from the center of the first head at the notch. A blade member,
The component mounting structure according to claim 7, wherein the blade member is inclined toward the second fastener, and biases the component toward the second fastener. The second leg portion includes a base shaft portion standing on the second head portion, and a pair of engagement pieces provided with the engagement protrusions extending from the distal end side of the base shaft portion toward the second head portion. And having
The second head has an escape hole that is perforated on both sides of the base shaft portion and allows the tip of the engagement piece to escape,
9. The component mounting structure according to claim 7, wherein the engagement protrusion is engaged with the engagement hole of the cylindrical portion by elastically deforming the engagement piece. . A push nut for attaching the second member to the recess formed in the first member,
A substrate having a shaft hole through which the second member is inserted;
A first engagement portion that is formed on the inner side of the substrate and is inclined toward the center of the shaft hole as it goes toward the bottom of the recess;
A second engagement portion that is formed outside the substrate and is inclined in a direction away from the center of the shaft hole as it is away from the bottom of the recess.
The push nut, wherein the second member and the first engaging portion engage with each other, and the concave portion and the second engaging portion engage with each other.

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