JP2021076148A - Fastening member and fastening structure - Google Patents

Abstract

To provide a novel fastening member that attaches, to a vehicle body, a vehicle part such as an underguard (skid plate or under plate) covering the lower part or front part of the vehicle body, and a fastening structure.SOLUTION: A fastening member 10 comprises: a long body part 11; a first shaft part 12 that is erected at one end part of the body part 11, and has a first male screw part 12a having a spiral thread; a second shaft part 13 that is erected at the other end part of the body part 11 and on the same surface as the surface on which the first shaft part 12 is erected, and has a second male screw part 13a having a spiral thread; and at least one screw hole part 14 provided in a central part of the body part 11 and allowing a bolt 31 to be inserted from the surface side on which the first shaft part 12 and the second shaft part 13 are erected.SELECTED DRAWING: Figure 1

Description

The present invention relates to, for example, a fastening member and a fastening structure for attaching an underguard (skid plate or underplate) or the like that covers the lower front portion of the vehicle from below to a vehicle body frame or the like.

Vehicles traveling off-road may be provided with a plate-shaped underguard (skid plate or underplate) at the bottom or front of the vehicle body for the purpose of protecting the vehicle body from impacts caused by earth and stones on the road (for example, skid plate or under plate). See Patent Documents 1 to 3 below).

Such vehicle parts such as underguards and bumpers are attached to the members to be fastened to the vehicle body by a fastening structure using bolts (for example, Patent Documents 4 and 5).

Jikkai Sho 58-79478 Jikkenhei 1-67183 Japanese Unexamined Patent Publication No. 8-142921 Japanese Unexamined Patent Publication No. 7-156728 Japanese Unexamined Patent Publication No. 2011-163555

The present invention has been made in view of the above problems, and an object of the present invention is, for example, a new fastening member for attaching a vehicle component such as an under guard (skid plate or under plate) covering the lower portion or the front portion of the vehicle body to the vehicle body. , And to provide a fastening structure.

In order to solve the above-mentioned problems, the fastening member according to the present invention has a long main body portion and a first male screw portion which is erected at one end of the main body portion and has a spiral thread. A second male screw portion having a spiral thread, which is the other end of the first shaft portion and the main body portion and is erected on the same surface as the surface on which the first shaft portion is erected. A second shaft portion provided with, and at least one screw hole portion provided in the central portion of the main body portion and allowing bolts to be inserted from the surface side on which the first shaft portion and the second shaft portion are erected. , It is characterized in that.

In the above configuration, it is preferable that the chamfered portion is provided on one end of the main body portion on the surface opposite to the surface on which the first shaft portion stands.

Further, in the above configuration, it is preferable that the length of the first shaft portion in the axial direction is longer than the length of the second shaft portion in the axial direction.

In the above configuration, a plate-shaped portion having a thickness equal to or higher than the height of the head of the bolt is further provided, and the plate-shaped portion is exposed in a state of penetrating the first shaft portion. It is preferable to include one through hole portion, a second through hole portion that is exposed in a state of penetrating the second shaft portion, and a bolt through hole portion that allows the bolt to penetrate.

Further, the fastening structure according to the present invention is a fastening structure for fastening the fastened member and the mounting member using the fastening member in order to solve the above-mentioned problems, and the fastened member is the first shaft. A first opening that exposes the portion from the back surface side of the member to be fastened, and a second opening that exposes the second shaft portion from the back surface side of the member to be fastened. And an opening for a bolt that allows the bolt to penetrate from the surface side of the member to be fastened, the first shaft portion is exposed from the first opening, and the second shaft portion is exposed to the second opening. The bolt is exposed from the portion, and the bolt is screwed into the screw hole portion from the surface side of the bolt to be fastened through the bolt opening to fix the fastening member to the fastened member. It is characterized in that the fastened member and the mounting member are fastened from the back surface side of the fastened member using the fastening member.

In the above configuration, it is preferable that at least one of the first opening and the second opening has an opening area through which the fastening member can be inserted.

The present invention exerts the following effects by the means described above.
That is, according to the fastening member of the present invention, a first shaft portion having a first male screw portion is provided at one end of a long main body portion, and a second male screw portion is provided at the other end. A second shaft portion is provided, and a screw hole portion that allows bolts to be inserted from the surface side on which the first shaft portion and the second shaft portion are provided is provided in the central portion of the main body portion. Has been done.

Here, the fastened member to be fastened by the fastening member having the above configuration has a first opening that exposes the first shaft portion in a state of penetrating from the back surface side of the fastened member, and a second shaft portion. It is provided with a second opening that is exposed in a state of penetrating from the back surface side of the above, and a bolt opening that allows the bolt to penetrate from the front surface side of the member to be fastened. Therefore, by screwing the bolt into the screw hole portion while at least penetrating the bolt opening from the surface side of the member to be fastened, the member to be fastened is fastened by the fastening member from the back side of the member to be fastened. ..

That is, according to the present invention, by fastening and attaching the fastening member having the above configuration to the fastening member of the vehicle body, for example, a vehicle component such as an under guard (skid plate or under plate) can be attached to the vehicle body. It works.

It is a perspective view which shows the fastening member which concerns on one Embodiment of this invention. FIG. 5 is a plan view showing a surface (back surface) side of the fastening member opposite to the standing surface of the first shaft portion and the second shaft portion. It is a partially enlarged view which roughly represents the vehicle body frame which includes the member to be fastened of this embodiment. It is a perspective view which shows the outline of the said member to be fastened. It is a perspective view which shows the state in which the fastening member is housed inside the fastening member. It is sectional drawing which shows the state that the fastening member is housed in the inside of the fastening member. It is sectional drawing which shows the mode that the fastening member accommodated in the fastened member is fastened to the fastened member by using a bolt. It is a top view which shows typically the under guard attached to the said member to be fastened. It is a perspective view which shows the appearance that the under guard was provided so that it abuts with the contact surface of the said member to be fastened. It is a perspective view which shows the state that the fastening member and the under guard are fastened to the fastened member.

(Fastening member)
The fastening member according to the embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a perspective view showing a fastening member according to the present embodiment. FIG. 2 is a plan view showing the surface (back surface) side of the fastening member on the side opposite to the erection surface of the first shaft portion and the second shaft portion.

As shown in FIG. 1, the fastening member 10 of the present embodiment includes at least a main body portion 11, a first shaft portion 12, and a second shaft portion 13.

The main body 11 has a substantially long plate-like shape. The length, width, and thickness of the main body 11 in the elongated direction are appropriately set according to the shape of the member to be fastened (details will be described later) to which the fastening member 10 is fastened.

As shown in FIG. 2, a screw hole portion 14 is provided in the central portion of the main body portion 11. In the main body portion 11, the screw hole portion 14 has a bolt (details will be described later) inserted from the erection surface 16 side on which the first shaft portion 12 and the second shaft portion 13 are erected, and the screw hole portion 14 and the bolt It can be screwed. The formation position of the screw hole portion 14 is not limited to the central portion of the main body portion 11. For example, it may be in the vicinity of the first shaft portion 12 or the second shaft portion 13. Further, the number of screw hole portions 14 is not limited to one, and a plurality of screw hole portions 14 may be provided.

Further, the main body portion 11 is provided with a chamfered portion 15 at the end of a surface 17 opposite to the upright surface 16 of the main body portion 11 (see FIG. 2). The chamfered portion 15 is formed at the end of the long main body portion 11 on the side where the first shaft portion 12 is erected.

The chamfered portion 15 is not particularly limited, and examples thereof include a gradient surface having an arbitrary gradient angle, a C surface, and an R surface. When the chamfered portion 15 is a gradient surface, the height of the gradient on the gradient surface is not particularly limited and can be set as appropriate. When the chamfered portion 15 is the C surface, the chamfered length of the C surface is not particularly limited and can be set as appropriate. Further, when the chamfered portion 15 is an R surface, the radius of curvature of the R surface is not particularly limited and can be set as appropriate.

The first shaft portion 12 is erected on the erection surface 16 at one end of the main body portion 11 so that the axial direction of the first shaft portion 12 is substantially perpendicular to the erection surface 16. Further, the erection position of the first shaft portion 12 is one end portion on the erection surface 16.

The first shaft portion 12 includes a first male screw portion 12a having a spiral thread. The first shaft portion 12 may have a mode in which a first continuous portion having no spiral thread is provided between the upright surface 16 and the first male screw portion 12a.

The axial length (height) and diameter of the first shaft portion 12 (first male screw portion 12a) are not particularly limited and can be appropriately set as necessary. When the first shaft portion 12 is provided with the first continuous portion between the upright surface 16 and the first male screw portion 12a, the length and diameter of the first continuous portion are not particularly limited, and are appropriately required. Can be set.

The second shaft portion 13 is erected on the erection surface 16 at one end of the main body portion 11 so that the axial direction of the second shaft portion 13 is perpendicular to the erection surface 16. Further, the erection position of the second shaft portion 13 is the other end portion on the erection surface 16.

The second shaft portion 13 includes a second male screw portion 13a having a spiral thread. The second shaft portion 13 may have a mode in which a second continuous portion having no spiral thread is provided between the upright surface 16 and the second male screw portion 13a.

The axial length (height) and diameter of the second shaft portion 13 (second male screw portion 13a) are not particularly limited and can be appropriately set as necessary. When the second shaft portion 13 is provided with the second continuous portion between the upright surface 16 and the second male screw portion 13a, the length and diameter of the second continuous portion are not particularly limited, and are appropriately required. Can be set.

Here, the length (height) of the first shaft portion 12 is longer than that of the second shaft portion 13. As a result, workability when attaching the fastening member 10 to the fastening member can be improved (details will be described later), and the present invention is not limited to this aspect. For example, the lengths of the first shaft portion 12 and the second shaft portion 13 may be the same, and the second shaft portion 13 may be longer than the first shaft portion 12.

(Member to be fastened)
Next, the fastened member for fastening the fastening member 10 of the present embodiment will be described by taking the case where the fastened member is a part of the vehicle body frame for mounting the under guard (mounting member) as an example.

FIG. 3 is a partially enlarged view schematically showing a vehicle body frame including the members to be fastened according to the present embodiment. FIG. 4 is a perspective view showing an outline of the member to be fastened. FIG. 5 is a perspective view showing a state in which the fastening member 10 is housed inside the fastening member.

As shown in FIG. 3, the fastened members 20 of the present embodiment are provided at both ends of the vehicle body frame 30. As shown in FIG. 4, the fastened member 20 includes at least a first opening 21, a second opening 22, and a bolt opening 23. The member to be fastened 20 has a rectangular parallelepiped shape having a hollow structure, and the fastening member 10 can be accommodated therein. Further, the first opening 21, the second opening 22, and the bolt opening 23 are provided in the vertical direction (in the arrow Y in FIG. 4) on the contact surface 24 with which the underguard abuts when the underguard is attached. Along the direction shown), they are arranged in columns in order from the top.

As shown in FIG. 5, the first opening 21 is exposed in a state where the first shaft portion 12 of the fastening member 10 housed inside the fastening member 20 is penetrated from the back surface side of the fastening member 20. Let me. The first opening 21 also functions as an insertion port for accommodating the fastening member 10 inside the fastening member 20.

The opening shape of the first opening 21 has a substantially circular shape. However, the opening shape of the first opening 21 is not limited to this aspect, and various other shapes such as a rectangular shape can be adopted. Further, the opening area of the first opening 21 is preferably large enough to allow the fastening member 10 to be inserted. Therefore, in the present embodiment, the opening area of the first opening 21 is larger than the opening area of the second opening 22.

As shown in FIG. 5, the second opening 22 is exposed in a state of penetrating the second shaft portion 13 of the fastening member 10 housed inside the fastening member 20 from the back surface side of the fastening member 20. Let me. The second opening 22 has a substantially circular shape. However, the opening shape of the second opening 22 is not limited to this aspect, and various other shapes such as a rectangular shape can be adopted. Further, the opening area of the second opening 22 is not particularly limited as long as it is at least large enough to allow the second shaft portion 13 to be exposed. For example, the opening area of the second opening 22 may be large enough to allow the fastening member 10 to be inserted.

As shown in FIG. 4, the opening shape of the bolt opening 23 is substantially circular. Further, the bolt opening 23 allows the bolt 31 to be inserted. As a result, the bolt 31 can be screwed into the screw hole portion 14 of the fastening member 10 in a state where the bolt 31 is passed through the bolt opening 23 from the surface (contact surface 24) side of the fastening member 10. The opening area of the bolt opening 23 requires that at least the bolt 31 can be inserted.

(Fastening structure)
Next, a fastening structure for fastening the fastened member 20 and the underguard 40 using the fastening member 10 of the present embodiment will be described below with reference to FIGS. 6 to 10.

FIG. 6 is a schematic cross-sectional view showing how the fastening member 10 is housed inside the fastening member 20. FIG. 7 is a schematic cross-sectional view showing how the fastening member 10 housed in the fastened member 20 is fastened to the fastened member 20 using a bolt 31. FIG. 8 is a plan view schematically showing an underguard attached to the member to be fastened. FIG. 9 is a perspective view showing a state in which an underguard is provided so as to abut on the contact surface 24 of the member to be fastened 20. FIG. 10 is a perspective view showing how the fastening member 10 and the underguard are fastened to the fastened member 20.

To accommodate the fastening member 10 in the fastened member 20, first, as shown in FIG. 6A, the second shaft portion 13 is inserted through the first opening 21. After the second shaft portion 13 is housed inside the fastened member 20, then, as shown in FIG. 6B, the main body portion 11 is moved from the other end on the side on which the second shaft portion 13 is erected. Let me insert it. At this time, since the chamfered portion 15 is provided at the end of the surface 17 on the side opposite to the standing surface 16 of the main body portion 11, the main body portion 11 can be easily brought into contact with the first opening 21. It can be inserted to improve workability. When the main body portion 11 is also housed inside the fastened member 20, the second shaft portion 13 is exposed from the second opening 22 as shown in FIG. 6 (c). At this time, the first shaft portion 12 is maintained in a state of being exposed from the first opening 21 without being accommodated inside the fastened member 20.

When the first shaft portion 12 is longer than the second shaft portion 13, the state in which the first shaft portion 12 is gripped is maintained satisfactorily when the fastening member 10 is housed inside the fastened member 20. it can. As a result, the fastening member 10 can be easily accommodated inside the fastened member 20, and workability can be improved.

Subsequently, as shown in FIG. 7A, the bolt 31 is inserted into the bolt opening 23 and screwed into the screw hole portion 14 of the main body portion 11 to fasten the fastening member 10 to the fastened member 20. When screwing the bolt 31 into the screw hole portion 14, a washer 32 is interposed between the bolt 31 and the member to be fastened 20.

Further, as shown in FIG. 7B, the underguard 40 is attached so as to abut the contact surface 24 of the member 20 to be fastened.

Here, as shown in FIG. 8, the underguard 40 has a substantially rectangular shape in a plan view and has substantially the same area as the contact surface 24 of the member to be fastened 20. The under guard 40 includes a first penetrating portion 41, a second penetrating portion 42, and a third penetrating portion 43, and the first penetrating portion 41 is exposed in a state of penetrating the first shaft portion 12 and is exposed to the second penetrating portion. The portion 42 is exposed in a state of penetrating the second shaft portion 13, and the male screw portion of the bolt 31 is inserted through the third penetrating portion 43. Further, the thickness of the under guard 40 is preferably equal to or greater than the height of the head of the bolt 31. Further, it is preferable that the third penetrating portion 43 has an opening area capable of accommodating the head portion of the bolt 31. As a result, it is possible to prevent the head of the bolt 31 from being exposed from the under guard 40.

Finally, as shown in FIG. 10, the first nut 51 is screwed into the first shaft portion 12 exposed from the under guard 40 via the first washer 53, and the second washer 54 is screwed into the second shaft portion 13. The second nut 52 is screwed through. As a result, the fastened member 20 and the under guard 40 are fastened by the fastening member 10 and the first nut 51 and the second nut 52, and the under guard 40 can be attached to the fastened member 20.

The first nut 51 has a structure that can be fitted with the first shaft portion 12. Further, the second nut 52 also has a structure that can be fitted with the second shaft portion 13. More specifically, each inner peripheral surface of the first nut 51 and the second nut 52 is provided with a screw hole that can be screwed into the first male screw portion 12a or the second male screw portion 13a, respectively. .. Further, the first nut 51 and the second nut 52 have a substantially hexagonal shape in a plan view. However, the present invention is not limited to this aspect, and various shapes to which a tool can be attached can be applied.

The first washer 53 and the second washer 54 are not particularly limited. For example, a circular flat plate-shaped base portion having a bolt through hole through which the first shaft portion 12 or the second shaft portion 13 can penetrate can be mentioned.

10 Fastening member 11 Main body 12 1st shaft 12a 1st male screw 13 2nd shaft 13a 2nd male screw 14 Screw hole 15 Chamfer 16 Standing surface 20 Fastened member 21 1st opening 22 2 Opening 23 Bolt opening 24 Contact surface 30 Body frame 31 Bolt 40 Under guard (mounting member)
41 1st penetrating part 42 2nd penetrating part 43 3rd penetrating part 51 1st nut 52 2nd nut 53 1st washer 54 2nd washer

Claims (6)

With a long body
A first shaft portion that is erected at one end of the main body portion and has a first male screw portion having a spiral thread, and a first shaft portion.
A second shaft portion that is the other end of the main body portion and is erected on the same surface as the surface on which the first shaft portion is erected and has a second male screw portion having a spiral thread. ,
At least one screw hole portion provided in the central portion of the main body portion and allowing bolts to be inserted from the surface side on which the first shaft portion and the second shaft portion are erected.
Fastening member comprising. The fastening member according to claim 1, wherein a chamfered portion is provided on a surface of one end of the main body portion opposite to the surface on which the first shaft portion stands. The fastening member according to claim 1 or 2, wherein the length of the first shaft portion in the axial direction is longer than the length of the second shaft portion in the axial direction. Further, a plate-shaped portion having a thickness equal to or higher than the height of the head of the bolt is provided.
The plate-shaped part
The first through hole portion to be exposed in a state of penetrating the first shaft portion, and
A second through-hole portion that is exposed in a state of penetrating the second shaft portion, and
A bolt through hole for passing the bolt and
The fastening member according to any one of claims 1 to 3. A fastening structure for fastening a fastened member and a mounting member using the fastening member according to any one of claims 1 to 4.
The fastened member is
A first opening that allows the first shaft portion to be exposed in a state of penetrating from the back surface side of the member to be fastened.
A second opening that allows the second shaft portion to be exposed in a state of penetrating from the back surface side of the member to be fastened.
An opening for a bolt that allows the bolt to penetrate from the surface side of the member to be fastened,
With
The first shaft portion is exposed from the first opening, and the second shaft portion is exposed from the second opening.
The bolt is screwed into the screw hole portion from the surface side of the bolt to be fastened through the bolt opening to fix the fastening member to the fastened member.
A fastening structure for fastening the fastened member and the mounting member from the back surface side of the fastened member using the fastening member. The fastening structure according to claim 5, wherein at least one of the first opening and the second opening has an opening area through which the fastening member can be inserted.

Images