JP5185229B2 - Structure with stud bolt - Google Patents

Description

  The present invention relates to a stud bolt and a structure including the stud bolt, and more particularly to a stud bolt that is used in a transport machine such as an automobile and a structure such as a building and has excellent mounting workability and easy position adjustment. And a structure including a stud bolt.

  Conventionally, in transport machines such as automobiles and structures such as buildings, fastening members such as bolts and nuts are used for fastening metal members and attaching parts (for example, Patent Documents 1 and 2). For example, as shown in FIG. 7, in a bumper stay 30 of an automobile, a stud bolt 10 is used as a fastening member to form a structure including a stud bolt, and a bumper is attached to the stud bolt 10 and fastened by, for example, a nut. To do.

  For example, in an assembly line for a transport machine such as an automobile, it is necessary to assemble a large number of parts. Therefore, it is preferable to mount a fastening member such as a bolt and a nut and a structure using these fastening members. Sex is required. However, for example, in the operation of fixing one part to the other part with bolts, nuts, etc. in a state where the parts are aligned with each other in a predetermined position, In order to fasten bolts or nuts, the skill of the operator may be required to be skilled. That is, it is necessary to support one part with, for example, one hand in a state of being aligned with the part to be fixed, and perform the fastening operation with the other hand. When it is large, it is difficult to fasten the parts together.

  For example, Patent Literature 1 discloses a technique for improving the mounting workability between components. In this Patent Document 1, when one component is attached and fixed to the other component, a stud bolt and a temporary support bracket are provided on the component to be attached, and the stud bolt insertion portion is provided on the component on the attachment side. There is disclosed a mounting structure in which a bracket having a hole is provided, and a fastening operation is performed in a state where a mounting-side component is supported by a stud bolt and a temporary support bracket.

  Conventionally, when a stud bolt is installed on a part, a member such as a pierce nut is driven in advance at a predetermined position of the part, and a stud bolt end screw is fastened to the pierce nut part to attach the stud bolt. It is attached to a part, and the boundary part of a stud bolt and a part is joined by welding etc. as needed. For example, when the target part on which the pierce nut is to be installed is an extruded profile having a hollow cross section, a pierce nut driving tool is inserted inside the hollow portion, and the pierce nut is driven into the inner wall of the extruded profile. For installation, the pierce nut protrudes toward the hollow portion by a predetermined thickness. Patent Document 2 discloses a technique for preventing the piercing nut protruding toward the hollow part from being caught by, for example, the driving tool itself and making it difficult to advance and retract the driving tool inside the extruded profile in such a case. It is disclosed.

JP 2008-1271 A JP 2008-223877 A

  However, the above-described prior art has the following problems. Patent Document 1 uses a stud bolt to improve the workability of assembling parts. As described above, in order to install a stud bolt, a pierce nut or the like is previously driven into the part and fixed with a tool or the like. There is a need to. Therefore, when the position of the pierce nut deviates from a predetermined installation position due to a tool attachment error or the like, it is necessary to fix the pierce nut again. In particular, in the extruded section having a hollow cross section, the position where the pierce nut should be installed is hidden by a driving tool or the like, and many deviations in the installation position of the pierce nut occur. However, once the pierce nut has been driven in once, a hole into which the pierce nut has been driven is once provided. Therefore, it is difficult to perform minute position adjustment again and to re-install the pierce nut.

  Moreover, although the technique of patent document 2 improves the driving | operation workability of a pierce nut, since it is necessary to insert a driving tool in the hollow part of a to-be-attached member, for example, the magnitude | size of the hollow part of a to-be-attached member is large. When the length is small, or when the size of the fastening member such as the pierce nut is large, the mounting workability may still be difficult.

  The present invention has been made in view of such a problem, and can be easily installed and a stud bolt capable of easily adjusting the position of the stud bolt even when the installation position on the attached member is shifted. An object is to provide such a structure.

The structure provided with the stud bolt according to the present invention is:
In a structure in which a steel stud bolt is attached to the attached member having a hole through the hole,
The stud bolt is
A bolt composed of a head portion larger than the hole and a shaft portion connected to the head portion and inserted into the hole;
A clip fitted to the shaft portion;
Have
In the shaft part,
Threaded part,
It is formed between this screw part and the head part, and once the insertion of the clip from the distal end side to the proximal end side of the shaft part is prevented, but the clip can get over to the proximal end side by press-fitting. A protrusion,
Is formed,
The protruding portion has a gentle slope whose outer diameter gradually increases in the head direction from the tip side of the shaft portion,
After inserting the shaft portion into the hole of the attached member, the clip is press-fitted so as to get over the protruding portion from the tip end side of the shaft portion to the head side, and between the head and the clip. The stud bolt is arranged in a loosely fitted state in the hole by sandwiching the attached member.

  In the above-described stud bolt, the clip may be configured to include a shaft tube portion that enters the hole and a flange portion that is larger than the hole. In this case, for example, in the clip, the inner peripheral surface of the shaft tube portion is reduced in diameter toward the flange side, and the longitudinal section is provided in a tapered shape.

  In the structure including the stud bolt, the mounting member is formed with a locking portion that prevents rotation of the bolt and / or the clip by fitting the head or the clip into a protrusion or a groove. It is preferable that

  In the structure including the stud bolt described above, the attached member can be made of, for example, an extruded shape member of aluminum or aluminum alloy, a casting, or a deformed rolled material.

  The stud bolt of the present invention can be attached to the attached member simply by fitting the clip to the bolt shaft and press-fitting the clip to the head side so as to get over the protruding part of the bolt. Easy.

  Since the structure provided with the stud bolt of the present invention has the stud bolt attached in the loosely fitted state to the hole of the attached member, the position adjustment is easy. Therefore, alignment of a to-be-attached member and a stud bolt is easy.

It is sectional drawing which shows an example of the stud bolt and to-be-attached member which concern on embodiment of this invention. (A) is a side view which shows the volt | bolt in the stud bolt of this invention, (b) is a top view similarly, (c) is the B section enlarged view of Fig.2 (a). (A) is a side view showing a clip in the stud bolt of the present invention, (b) is also a top view, and (c) is a side view showing a clip in which the inner peripheral surface of the shaft tube portion is reduced in diameter in the axial direction. It is. (A) is a perspective view which shows an example of the structure provided with the stud bolt of this invention, (b) is AA sectional drawing of Fig.4 (a). (A) is CC sectional drawing of Fig.1 (a) which shows the attachment locus | trajectory of a bolt in the structure with a stud bolt concerning 1st Embodiment of this invention, (b) is Fig.5 (a). It is a top view. It is sectional drawing which shows the structure with a stud bolt concerning 2nd Embodiment of this invention. (A), (b) shows an example of the structure provided with the conventional stud bolt.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a cross-sectional view showing an example of a stud bolt and a member to be attached according to an embodiment of the present invention. 2 (a) is a side view showing the bolt in the stud bolt of the present invention, FIG. 2 (b) is a top view of the bolt, FIG. 2 (c) is an enlarged view of portion B of FIG. 2 (a), and FIG. 3 (a) is a side view showing a clip in the stud bolt of the present invention, FIG. 3 (b) is a top view of the same, and FIG. 3 (c) is a clip in which the inner peripheral surface of the shaft tube portion is reduced in the axial direction. FIG. FIG. 4A is a perspective view showing an example of a structure provided with the stud bolt of the present invention, and FIG. 4B is a cross-sectional view taken along line AA of FIG. FIG. 5A is a cross-sectional view taken along the line CC in FIG. 1A showing the mounting locus of the bolt in the structure having the stud bolt according to the first embodiment of the present invention, and FIG. It is a top view of (a).

  The stud bolt 10 of the present invention is disposed on a member to be attached such as a bumper stay 30 of an automobile as shown in FIG. 4, for example, and constitutes a structure having the stud bolt 10. As shown in FIG. 1, the stud bolt 10 of the present invention is constituted by a bolt 1 and a clip 2. The stud bolt 10 is disposed on the mounted member 3 through a hole 3 c provided in the mounted member 3.

  The bolt 1 is made of, for example, a steel material such as S45C and high-tensile steel, and is configured by appropriately selecting a material suitable for the application. As shown in FIG. 2A, the bolt 1 is composed of a head portion 1a and a shaft portion 1b, and the shaft portion 1b has a smooth portion 1c having a smooth circumferential surface at a predetermined length from the head portion 1a. A protruding portion 1d that protrudes in the radial direction is provided at a position spaced apart from the head portion 1a by the smooth portion 1c. And the part from the protrusion part 1d to the front-end | tip of the axial part 1b is the screw part 1e in which the screw | thread only the length required as a stud bolt was formed.

  As shown in FIG. 2B, the head 1a of the bolt 1 has, for example, a square shape in plan view, and is locked so as not to rotate due to the structure provided in the attached member 3 described later. Is done.

  As shown in FIG. 1 (a), the length of the smooth portion 1 c of the shaft portion 1 b having the head 1 a of the bolt 1 as the base end is provided, for example, approximately equal to the plate thickness of the mounted member 3. Yes. Further, the length of the threaded portion 1e is appropriately set to an optimum length according to the use of the component fixed to the stud bolt 10.

  As shown in FIG. 2C, the protruding portion 1d is provided with a diameter slightly larger than the outer diameter of the smooth portion 1c and the screw portion 1e. The protruding portion 1d is provided with a gentle slope so that the outer diameter gradually increases in the axial direction of the bolt 1, for example, from the screw portion 1e to the outermost edge portion of the protruding portion 1d.

  Similar to the bolt 1, the clip 2 is made of, for example, a steel material such as S45C and high-tensile steel, and is configured by appropriately selecting a material suitable for the application. As shown in FIG. 3, the clip 2 includes, for example, a cylindrical shaft tube portion 2a and a flange portion 2b provided at a side end portion thereof. The clip 2 is fitted to the protruding portion 1d of the bolt 1 by the shaft tube portion 2a. Combined.

  The inner diameter of the shaft tube portion 2a is larger than the outer diameter of the smooth portion 1c and the screw portion 1e and slightly smaller than the outer diameter of the protruding portion 1d, and is constant in the cylindrical axis direction (FIG. 3A). Or the diameter is reduced from the side end portion on the opposite side to the flange portion 2b to the side end portion on the flange portion 2b side, and the longitudinal section is provided in a tapered shape. Thus, when the shaft portion 1c of the bolt 1 is inserted into the clip 2 from the side end opposite to the flange portion 2b, the clip 2 is temporarily prevented from being inserted at the position of the protruding portion 1d. Then, the protrusion 1d is moved over to the base end side of the shaft portion of the bolt 1. Thereby, the clip 2 can be fitted to the bolt 1. When the clip 2 is fitted to the bolt, for example, the side end portion of the shaft tube portion 2a opposite to the flange portion 2b contacts the head portion 1a of the bolt 1 as shown in FIG.

  As shown in FIG. 3B, the flange portion 2b is, for example, a square shape in a plan view, and is locked so that the clip 2 does not rotate by a structure provided on the attached member 3 described later.

  As described above, the stud bolt 10 of this embodiment is attached by simply fitting the clip 2 to the shaft portion 1b of the bolt 1 and press-fitting the clip 2 to the head 1a side so as to get over the protruding portion 1d of the bolt 1. The stud bolt 10 can be easily installed. Therefore, it is not necessary to use a driving tool and a welding apparatus that are necessary for installing the conventional stud bolt, and the assembling workability of the parts can be improved.

  Next, the attached member 3 to which the stud bolt 10 of this embodiment is attached will be described. In this embodiment, the to-be-attached member 3 is comprised from the extruded shape of a square tube shape, for example, as shown in FIG. As shown in FIGS. 1 and 5, the mounted member 3 includes a hole 3 c through which the shaft portion 1 b of the bolt 1 is inserted. That is, the stud bolt 10 is attached between the clip 2 and the head 1a of the bolt 1 by inserting the shaft portion 1b of the bolt 1 into the hole 3c and press-fitting the clip 2 into the protruding portion 1d of the bolt 1. It can be used so as to sandwich the member 3. The hole 3c has, for example, a circular cross section, and the diameter thereof is larger than the outer diameter of the shaft portion 1b of the bolt 1 and smaller than the length of one side of the head 1a of the bolt 1. Further, for example, when the clip 2 is fitted to the bolt 1 and the shaft tube portion 2a of the clip 2 is configured to contact the head 1a of the bolt 1, the diameter of the hole 3c is as shown in FIG. As shown in FIG. 2, the outer diameter of the cylindrical shaft tube portion 2a of the clip 2 is larger. Therefore, as shown in FIGS. 1 and 5, when the shaft 1b of the bolt 1 is inserted into the hole 3c and the clip 2 is fitted to the bolt 1 as shown in FIG. Thus, it can be loosely fitted in the hole 3c of the attached member 3 and can be moved in a direction perpendicular to the axis of the bolt 1 integrally.

  In addition, in the hollow member, for example, two protrusions 3a are formed in the hollow portion so as to sandwich the hole 3c on the inner peripheral surface provided with the hole 3c. And extend parallel to each other. The distance between the two projections 3a is, for example, slightly longer than the length of one side of the head 1a of the bolt 1 in the plan view and shorter than the diagonal of the plan view of the head 1a. Therefore, as shown in FIG. 5B, when the shaft portion of the bolt 1 is inserted into the hole 3c, the head 1a of the bolt 1 is fitted between the two protrusions 3a of the mounted member 3. Accordingly, the head 1a cannot be freely rotated except for a slight rotation, and free rotation is prevented.

  Further, the attached member 3 has a concave groove 3b formed on the outer surface thereof so that the hole 3c is located at the center as shown in FIGS. The groove 3b extends in parallel along the direction in which the attached member 3 is pushed, and the width of the groove 3b is slightly larger than, for example, the length of one side of the flange portion 2b of the clip 2 in the plan view, and the flange 3b. It is shorter than the length of the diagonal line of the part 2b in plan view. As a result, when the flange portion 2b is fitted in the groove 3b, the flange portion 2b cannot be freely rotated except for a slight rotation, and free rotation is prevented. In the present embodiment, the depth of the groove 3b is provided to be equal to or greater than the thickness of the flange portion 2b, for example.

  Next, the process of constituting the structure provided with the stud bolt by attaching the stud bolt 10 of the present embodiment to the attached member 3 will be described. First, as shown to Fig.5 (a), the volt | bolt 1 is inserted from the opening part of the to-be-attached member 3, from the axial part 1b side. Then, with the bolt 1 tilted toward the hole 3c of the attached member 3, the tip of the shaft portion 1b is brought close to the hole 3c. And the axial part 1b of the volt | bolt 1 is inserted in the hole 3c. Since the diameter of the hole 3c of the attached member 3 is larger than that of the shaft portion 1b of the bolt 1, the bolt can be easily inserted into the hole 3c of the attached member 3.

  Then, the bolt 1 is inserted into the hole 3c until the head 1a of the bolt 1 comes into contact with the inner surface of the hollow portion of the mounted member 3. At this time, the head 1a is fitted between the protrusions 3a on the inner peripheral surface of the attached member 3, or abuts on the top of the protrusion 3a. When the head 1a is fitted between the protrusions 3a on the inner peripheral surface of the attached member 3, when the bolt 1 tries to rotate, the side surface of the head 1a contacts the side surface of the protrusion 3a, and the bolt 1 rotates. Can be prevented. On the other hand, when the head 1a is in contact with the top of the protrusion 3a, the rotation of the bolt 1 cannot be prevented, so the bolt 1 is rotated around the axis while being pressed in the axial direction. When the head 1a is rotated until the head 1a has an angle that fits between the two protrusions 3a, the head 1a is pressed and moved to a position corresponding to the bottom of the protrusion 3a, and the head 1a is moved to the two protrusions 3a. When the bolt 1 tries to rotate in a state of being fitted in between, the side surface of the head 1a comes into contact with the side surface of the protrusion 3a, and the bolt 1 can be prevented from rotating.

  Next, in a state where the head 1a of the bolt 1 is supported by the hand from the inside of the hollow portion of the attached member 3, the clip 2 is moved, and the shaft cylinder portion 2a of the clip 2 is moved to the opposite side of the flange portion 2b. The shaft 1b of the bolt 1 is inserted from the side end. Since the inner diameter of the shaft tube portion 2a is larger than the outer diameter in the range 1c from the projecting portion 1d of the bolt 1 to the tip of the shaft portion 1b, the shaft portion 1b of the bolt 1 is inserted into the clip 2 smoothly. I can go. And the axial cylinder part 2a approaches the protrusion part 1d of the volt | bolt 1 along the axial part 1b, and contacts the protrusion part 1d of an outer diameter larger than the internal diameter of the axial cylinder part 2a before long.

  In this state, adjustment is performed by rotating the flange portion 2b so that the rectangular flange portion 2b of the clip 2 is positioned on the groove 3b of the mounted member 3 when viewed from the axial direction of the bolt 1 (in plan view). To do. And the clip 2 is pressed from the front-end | tip direction of the axial part 1b of the volt | bolt 1 in the state which maintained not to rotate the flange part 2b.

  As described above, the protruding portion 1d is provided with a diameter slightly larger than the outer diameter of the smoothing portion 1c and the screw portion 1e of the bolt 1, as shown in FIG. 3 (c). For example, a gentle slope is provided so that the outer diameter gradually increases in the axial direction of the bolt 1 from the screw portion 1e to the outermost edge portion of the protruding portion 1d. Further, the inner diameter of the shaft tube portion 2a is provided slightly smaller than the outer diameter of the projecting portion 1d of the bolt 1, and is constant in the cylindrical axis direction or is flanged from the side end portion on the opposite side to the flange portion 2b. It is provided so that the inner diameter gradually decreases in a tapered shape toward the side end on the side of the portion 2b. Therefore, by pressing the clip 2, the inner peripheral surface of the shaft tube portion 2 a is in a state of pressing the protruding portion 1 d of the bolt 1. Therefore, the clip 2 is temporarily prevented from being inserted at the position of the protruding portion 1d, but gets over the protruding portion 1d by press-fitting. Then, the clip 2 moves while press-fitting the projecting portion 1d along the axis of the bolt 1 in an interference-fitted state, and eventually the clip 2 is attached to the bolt 1 at the side end portion of the shaft tube portion 2a, for example. The clip 2 is fitted to the bolt 1 in contact with the head 1 a and with the attached member 3 sandwiched between the head 1 a of the bolt 1 and the clip 2. Thereby, a structure with a stud bolt is constituted.

  Next, the usage method of the structure provided with the stud bolt of this embodiment is demonstrated. First, a part (a bumper of an automobile in the example of the bumper stay 30 in FIG. 4) to be fixed to a structure having a stud bolt is attached to the bolt 1 at a predetermined fixing hole (a hole through which the stud bolt 10 is inserted). The bolt 1 is inserted into the fixing hole of the component in the vicinity of the tip of the shaft portion 1b. At this time, when the position of the bolt 1 matches the position of the fixing hole of the component, the bolt 1 can be smoothly inserted into the fixing hole of the component. On the other hand, when the position of the bolt 1 is shifted with respect to the fixing hole of the component due to an attachment error or the like, or when the position of the fixing hole of the component is shifted with respect to the position of the bolt 1 due to a processing tolerance of the fixing hole The bolt 1 cannot be smoothly inserted into the fixing hole. In the structure provided with the stud bolt of the present invention, since the hole 3c having a size capable of loosely fitting the bolt 1 and the clip 2 is formed in the attached member 3, the bolt 1 and the clip 2 are integrally formed. It can be moved in a direction perpendicular to the axis of the bolt 1. Therefore, if the bolt 1 and the clip 2 are moved together, the component can be attached to the stud bolt 10 by aligning the fixing hole of the component with the position of the tip of the bolt 1.

  In the structure including the stud bolt of the present embodiment, a hole 3 c having a size capable of loosely fitting the stud bolt 10 into the hole of the attached member 3 is formed. Therefore, the bolt 1 can be easily inserted into the hole 3 c of the attached member 3. In addition, even when an extruded profile whose cross-sectional shape is a closed cross section is used as the mounted member 3, for example, the stud bolt 10 can be easily installed without inserting a mounting tool into the hollow portion and installing a pierce nut. It is possible to improve the assembly workability of parts. Moreover, as a bolt, a thing with a large diameter can also be used, and the freedom degree of design improves.

In the present embodiment, the protrusion 3 a and the groove 3 b are formed on the attached member 3, and the flange portion 2 b of the clip 2 is attached to the attached member 3 in a state where the clip 2 is fitted to the bolt 1. The head 1 a of the bolt 1 is also fitted between the two protrusions 3 a even inside the mounted member 3. That is, when the bolt 1 tries to rotate integrally with the clip 2, the side surface of the flange portion 2b contacts the side surface of the groove 3b, and the side surface of the head 1a of the bolt 1 contacts the side surface of the protrusion 3a. It is possible to prevent the bolt 1 and the clip 2 from rotating. Therefore, when the stud bolt 10 is used, the nut can be fastened smoothly when the component is fixed to the stud bolt 10.

  Further, in this embodiment, the attached member 3 is formed with a hole 3c larger than the outer diameter of the cylindrical shaft portion 2a of the clip 2, for example, and the clip 2 is fitted to the bolt 1. In this state, the bolt 1 and the clip 2 are loosely fitted together in the hole 3c. Accordingly, the stud bolt 10 can be moved in a direction perpendicular to the axis of the bolt 1 within the range of the size of the hole 3c, and thereby the installation position of the stud bolt 10 is deviated from the predetermined position of the mounted member 3. Even in the case, the stud bolt 10 can be easily moved to easily adjust the position.

  Furthermore, when the depth of the groove 3b is equal to or greater than the thickness of the flange portion 2b, for example, the clip 2 protrudes from the outermost surface of the mounted member 3 when the clip 2 is fitted to the bolt 1. This can be prevented. Therefore, when the stud bolt 10 is used, it is possible to prevent the clip 2 from interfering with the attachment of the parts fixed to the stud bolt.

  In the present embodiment, the head portion 1a and the flange portion 2b of the bolt 1 are square, for example, hexagonal in plan view. However, the bolt 1 and the clip 2 can be prevented from rotating as long as the bolt 1 and the clip 2 can be prevented from rotating. The shapes of the head 1a and the flange 2b of the clip 2 are not limited. For example, the length of the smooth portion 1c of the shaft portion 1b of the bolt 1 may not be approximately the same as the plate thickness of the mounted member 3, and is appropriately selected according to the use in the case where the bolt 1 is used as a stud bolt. The length can be selected. Further, the smooth portion 1c of the bolt 1 may be provided with, for example, a screw. The outer diameter of the smooth portion 1c is set to be the same as the top of the protruding portion 1d, and the protruding portion 1d and the smoothing portion 1c are integrated. You may comprise. That is, the shape and dimensions of the shaft portion 1b are not limited as long as the clip 2 can be press-fitted and fitted into the protruding portion 1d. Furthermore, it is not necessary to provide the protruding portion 1d at the boundary portion between the smooth portion 1c and the screw portion 1e. The protruding portion 1d may be provided in the middle of the screw portion 1e, or the protruding portion 1d may be provided in the middle of the smooth portion 1c. . Furthermore, in this embodiment, the clip 2 is composed of the shaft tube portion 1a and the flange portion 2b. However, if the clip 2 is configured to fit at least the protruding portion 1d of the bolt 1, the clip 2 The shape is not limited. For example, the clip 2 may be formed in a plate shape and fit between the grooves 2b, or may have a shape without the flange portion 2b. Further, when the clip 2 is fitted to the protruding portion 1 d of the bolt 1, the side end portion of the clip 2 may be provided so as not to contact the head 1 a of the bolt 1. Furthermore, in the present embodiment, the projecting portion 1d is provided with a gentle slope so that the outer diameter gradually increases in the axial direction of the bolt 1. However, the projecting portion 1d may not have a gentle slope. The head 1a of the bolt 1 may not be rectangular in plan view. For example, if the plate-shaped head is provided with a slit, the shaft of the bolt 1 may be configured to have a slight shaft. The range of adjustment of the position of the stud bolt 10 can be slightly expanded.

  Furthermore, the attached member 3 is made of a rectangular tube-shaped extruded material, but in the present invention, the material and shape of the attached member 3 are not particularly limited. However, when it is set as the structure by which the protrusion 3a and the groove | channel 3b are formed in the to-be-attached member 3, it is preferable that the to-be-attached member 3 is comprised by the extrusion shape material, the casting, or the profile rolling material, and productivity and From the viewpoint of securing the strength, it is particularly preferable that it is made of an extruded profile. Further, the cross-sectional shape of the mounted member 3 is not limited to the hollow closed cross section, and various modifications can be made within the range having the configuration of the present invention. For example, in the bumper stay 30 as shown in FIG. 4, a plate-like member can be used as the mounted member 3. Further, the projection 3a and the groove 3b formed on the attached member 3 are not particularly limited in size and installation range as long as the rotation of the bolt 1 and the clip 2 can be prevented. If the rotation can be sufficiently prevented, the protrusion 3a and the groove 3b may not be formed. In addition, the hole 3c may be appropriately selected as long as the hole 3c having a size that takes into account the dimensional tolerance and attachment tolerance of the part is appropriately formed and does not deteriorate the workability of attaching the bolt 1. it can. In this case, the shape of the hole 3c is not limited to a circle but may be an ellipse or a rectangle.

  Next, a structure having a stud bolt according to a second embodiment of the present invention will be described. FIG. 6 is a cross-sectional view showing a structure having a stud bolt according to the second embodiment. As shown in FIG. 6, in this embodiment, the hollow portion of the mounted member 3 has a groove 3d formed on the inner peripheral surface instead of the protrusion 3a, and a hole 3c is formed at the center of the groove 3d. positioned. The width of the groove 3d is slightly longer than the length of one side of the square of the head 1a of the bolt 1 and shorter than the length of the diagonal line of the square of the head 1a. That is, in the present embodiment, the rotation of the bolt 1 is prevented by fitting the head 1a of the bolt 1 into the groove 3d. Other configurations are the same as those of the first embodiment.

  Further, in the process of assembling the structure having the stud bolt according to the present embodiment, the bolt 1 is inserted into the hole 3c of the mounted member 3, and the head 1a of the bolt 1 contacts the inner surface of the hollow portion of the mounted member 3. When the shaft portion 1b of the bolt 1 is inserted into the hole 3c, the head portion 1a fits into the groove 3d and comes into contact with the bottom of the groove 3d, or on the inner surface of the mounted member 3 corresponding to the topmost portion of the groove 3d. Abut. When the head 1a is fitted in the groove 3d and is in contact with the bottom of the groove 3d, when the bolt 1 tries to rotate, the side surface of the head 1a contacts the side surface of the groove 3d and the bolt 1 rotates. Can be prevented. On the other hand, since the rotation of the bolt 1 cannot be prevented when the head 1a is in contact with the inner surface of the mounted member 3 corresponding to the topmost portion of the groove 3d, the bolt 1 is pressed in the axial direction. Rotate around the axis. Then, when the head 1a is rotated to an angle that fits into the groove 3d, the head 1a is pressed and moved to a position where it abuts against the bottom of the groove 3d, and the head 1a is fitted into the groove 3d. When the bolt 1 tries to rotate, the side surface of the head 1a comes into contact with the side surface of the groove 3d, and the rotation of the bolt 1 can be prevented. Other assembly steps are the same as those in the first embodiment.

  Also in the present embodiment, as in the first embodiment, the stud bolt 10 has the clip 2 fitted to the shaft portion 1b of the bolt 1 and the clip 2 gets over the protruding portion 1d of the bolt 1 on the head 1a side. The stud bolt 10 can be easily installed by simply press-fitting into the stud. Therefore, it is not necessary to use a driving tool and a welding apparatus that are necessary for installing the conventional stud bolt, and the assembling workability of the parts can be improved.

  Further, when the stud bolt 10 is attached to the attached member 3 to form a structure including the stud bolt, the bolt 1 can be easily inserted into the hole 3c of the attached member 3, and the attached member 3 As a result, even when using an extruded profile whose cross-sectional shape is a closed cross-section, there is no need to insert an attachment tool into the hollow portion. Accordingly, the assembly workability of the parts can be improved, and a bolt having a large diameter can be used, so that the degree of freedom in design is also improved.

  Furthermore, also in this embodiment, since rotation of the stud bolt 10 is prevented, when fixing components to the stud bolt 10, a nut etc. can be fastened smoothly.

  Furthermore, even when the installation position of the stud bolt 10 is deviated from the predetermined position of the mounted member 3, the stud bolt 10 can be easily moved to easily adjust the position.

  In the present embodiment, the bolt 1, the clip 2, and the attached member 3 can be variously modified as in the first embodiment.

  In the second embodiment, the mounted member 3 is formed with a groove 3d in place of the protrusion 3a on the inner peripheral surface of the hollow portion. In the present invention, the mounted member 3 is clipped. A protrusion for preventing the rotation of the flange portion 2b may be formed instead of the groove 3b on the second side, and the present invention can be applied to various aspects as long as the structure can prevent the rotation of the bolt 1 and the clip 2. Can be applied.

  1: bolt, 1a: head, 1b: shaft portion, 1c: smooth portion, 1d: protruding portion, 1e: screw portion, 10: stud bolt, 2: clip, 2a: shaft tube portion, 2b: flange portion, 3 : Mounted member, 3b: groove, 3c: hole, 3d: groove, 30: bumper stay

Claims (5)

In a structure in which a steel stud bolt is attached to the attached member having a hole through the hole,
The stud bolt is
A bolt composed of a head portion larger than the hole and a shaft portion connected to the head portion and inserted into the hole;
A clip fitted to the shaft portion;
Have
In the shaft part,
Threaded part,
It is formed between the threaded portion and the head, and is larger than the thread diameter of the threaded portion, and once the insertion of the clip from the distal end side of the shaft portion to the head side is blocked, A protrusion that allows the clip to get over to the head side;
Is formed,
The protruding portion has a gentle slope whose outer diameter gradually increases in the head direction from the tip side of the shaft portion,
After inserting the shaft portion into the hole of the attached member, the clip is press-fitted so as to get over the protruding portion from the tip end side of the shaft portion to the head side, and between the head and the clip. A structure including a stud bolt, wherein the stud bolt is loosely arranged in the hole by sandwiching the attached member. 2. The structure including a stud bolt according to claim 1, wherein the clip includes a shaft tube portion that enters the hole and a flange portion that is larger than the hole . The structure with a stud bolt according to claim 2 , wherein the clip is provided with an inner peripheral surface of the shaft tube portion having a diameter reduced toward the flange side and a longitudinal section tapered. body. The locking member for preventing rotation of the bolt and / or the clip when the head or the clip is fitted in a protrusion or a groove is formed on the attached member. A structure provided with the stud bolt according to any one of 1 to 3 . The structure with a stud bolt according to any one of claims 1 to 4, wherein the member to be attached is an extruded shape member of aluminum or aluminum alloy, a casting, or a deformed rolled material.

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