JP4307191B2 - Stud bolt clamp - Google Patents

Description

  The present invention relates to a stud bolt clamp. For example, the present invention relates to a stud bolt clamp that mounts a protector for an electric wire cable disposed in a vehicle such as an automobile on a vehicle body using a stud bolt provided at an attachment site.

A wire cable protector (hereinafter referred to as a protector) disposed on a vehicle body such as an automobile is attached to the vehicle body by a predetermined clamp. That is, the protector is attached to the vehicle body by fitting the fitting means in the main body of the clamp and the stat bolt provided at the attachment site. For example, a protector for a high-voltage wire is routed on the body of a hybrid car that uses both an engine and an electric motor as a power source. A clamp is attached to the protector. The protector is attached to the vehicle body by fitting and inserting the fitting means in the clamp body and the stud bolt provided on the attachment surface of the vehicle body.
As a general structure in this type of clamp body, there is a structure in which hinge portions are provided on both sides of the body in axial symmetry, and an engagement protrusion that engages with a stud bolt outer peripheral groove is provided at the tip of the hinge portion ( Patent Document 1). According to this clamp, the stud bolt can be inserted by bending deformation of the hinge portion in the main body. On the contrary, the stud bolt is not easily removed from the clamp body. This is because the engaging protrusion and the stud bolt outer peripheral groove are in an engaged state. Moreover, it is because the load at the time of extraction is absorbed by the elastic deformation of the hinge part.

In this type of clamp, it is desirable that the clamp is not easily detached from the stat bolt, that is, a larger holding force is desirable from the viewpoint of maintaining a reliable assembled state for a long time. In the clamp having the above structure, the engaging projection portion is formed so as to correspond to the outer peripheral groove of the stat bolt, thereby increasing the holding force. That is, the engagement protrusion is formed to be the same or slightly larger corresponding to the shape of the stud bolt outer peripheral groove. As a result, the engagement between the engagement protrusion and the stud bolt outer peripheral groove is reliably performed and is strongly maintained. Therefore, a large load is required to release this engagement and extract the clamp from the stud bolt. Thus, according to the clamp, the holding force can be improved without adding a special structure or element to the inside of the main body.
JP-A-11-173320

  However, the above-described configuration has a problem that the insertion load when the stud bolt is inserted into the clamp body is increased. The engaging projection at the tip of the hinge part in the above structure is formed corresponding to the outer peripheral groove of the stat bolt. In other words, the engagement surface angle of the engagement protrusion arranged first in the stud bolt insertion direction is formed at substantially the same angle as the corresponding stud bolt groove shape angle, and is usually slightly downward with respect to the insertion direction. Is given, but is formed as an angle close to substantially vertical. For this reason, at the time of insertion, the tip of the stat bolt first comes into contact with the engagement surface that is close to the vertical, and in this contact state, the hinge portion having the engagement protrusion can be elastically deformed outward and inserted. Necessary. The insertion load for elastically deforming the hinge part at this time requires a large load because the angle of formation of the engagement surface of the first engagement protrusion is close to the perpendicular to the insertion direction. As a result, labor is also required for attaching the protector using the clamp, resulting in a problem that workability is deteriorated.

  The present invention was devised in view of such points, and the problem to be solved by the present invention is to facilitate the deformation of the hinge part during insertion while maintaining the holding force of the clamp. It is to reduce the insertion load of the stud bolt.

In order to solve the above problems, each invention of the present invention takes the following means.
First, the stud bolt clamp according to the first invention takes the following means. That is, a stud bolt clamp that is attached to a mounting part and is fitted and inserted into a stud bolt that is erected on the mounting part, and is attached to the mounting part, at least on both sides of the stud bolt that are axisymmetric A hinge portion having a shape that can be bent in the insertion direction and outward is provided at a position, and the tip of the hinge portion is formed as a locking piece that elastically supports the stud bolt. A plurality of engaging projections corresponding to the groove shape of the stud bolt are formed to be engaged with the groove of the stud bolt, and the engagement of the first engaging projection in the insertion direction among the plurality of engaging projections is engaged. The angle of the mating surface is formed larger than the groove shape angle of the corresponding stud bolt . In addition, the angle of the engaging surface of the remaining engaging protrusion different from the first engaging protrusion is formed at the same angle as the groove shape angle of the corresponding stud bolt.
According to the first aspect of the present invention, the hinge part having a shape that can be bent in the insertion direction and the outward direction is provided at least at both axially symmetrical positions of the stud bolt, and the tip of the hinge part is provided with the stud bolt. The engaging piece is elastically supported, and a plurality of engaging protrusions corresponding to the groove shape of the stud bolt are formed on the engaging piece so as to be engaged with the groove of the stud bolt. In addition, a plurality of engaging protrusions corresponding to the groove shape of the stud bolt are formed on the locking piece so as to be engaged with the groove of the stud bolt, thereby maintaining the holding force of the clamp with respect to the stud bolt. Is planned. Furthermore, the angle of the engagement surface of the first engagement protrusion in the insertion direction among the plurality of engagement protrusions is formed larger than the groove shape angle of the corresponding stud bolt, that is, formed at an angle greatly inclined in the insertion direction. This facilitates the outward deformation of the hinge part during insertion. In other words, most of the insertion load of the stud bolt can be made to act as an acting force that deforms outward with respect to the engagement surface of the first engagement protrusion, and as a result, the entire hinge part is elastically outward. Can be deformed and spread. Thereby, the insertion load of the clamp with respect to a stud bolt can be reduced.

Next, the stud bolt clamp according to the second invention takes the following means. In other words, the stud bolt clamp according to the first invention is characterized in that a plurality of sets of hinge portions having the tip as a locking piece are provided along the stud bolt insertion direction.
According to the second aspect of the invention, since a plurality of sets of hinge portions with the tip as a locking piece are provided along the stud bolt insertion direction, the holding force of the clamp can be further improved.

Next, the stud bolt clamp according to the third invention takes the following means. That is, the stud bolt clamp according to the first invention or the second invention, wherein the hinge part is made of resin.
According to the third aspect of the invention, since the hinge part is made of resin, the weight of the clamp can be reduced and the hinge part can be easily formed. Moreover, the elastic deformation of the hinge part at the time of insertion can be performed easily.

According to the present invention described above, the following effects can be obtained.
First, according to the first invention, it is possible to reduce the insertion load during insertion while maintaining a predetermined holding force with respect to the stud bolt.

Next, according to the second invention, the holding force of the clamp can be further improved.
Next, according to the third aspect of the invention, the weight of the clamp is reduced and the formation of the hinge portion is facilitated.

The best mode for carrying out the present invention will be described below with reference to the drawings. Each embodiment described below relates to a stud bolt clamp 10 (hereinafter referred to as a clamp 10) for attaching a wire cable protector 1 (hereinafter referred to as a protector 1) to a vehicle body floor lower surface A at a position shown in FIG. That is, as shown in FIG. 2, the clip 20 portion of the clamp 10 is inserted into the hole 1 a formed in the protector 1. Subsequently, the stud bolt 2 is inserted into the insertion hole 14 provided in the upper surface of the clamp 10. In this way, the protector 1 is fixed to the vehicle body floor lower surface A as shown in FIG. At this time, the protector 1 is sandwiched between the clip 20 portion of the clamp 10 and the gripping member 30, and the protector 1 is fixed to the clamp 10. And the hinge part 40 inside the clamp 10 and the groove | channel of the stud bolt 2 will be in the state fitted, and the stud bolt 2 and the clamp 10 will be fastened.
The stud bolt 2 is provided upright on the vehicle body floor lower surface A. Ordinarily, the stud bolt 2 is integrally attached to the vehicle body floor lower surface A at the lower part of the vehicle body.
Hereinafter, the clamp 10 will be described in detail.

Example 1 is shown in FIGS. 3 is a perspective view of the clamp 10 according to the first embodiment, FIG. 4 is a plan view of the clamp 10 according to the first embodiment, FIG. 9 is a front view of the clamp 10 according to the first embodiment, and FIGS. FIG.
As shown in FIG. 3, the clamp 10 according to the first embodiment includes a main body 11 having a substantially quadrangular planar shape, a clip 20 provided integrally with the main body 11, and a gripping member 30 that extends around the lower portion of the main body 11. It consists of.

First, the main body 11 will be described. The main body 11 includes a storage portion 12 and a support portion 15 provided integrally with the storage portion 12.
First, the storage unit 12 will be described. As shown in FIG. 4, the storage portion 12 is a hollow cylindrical body whose planar shape is a substantially square shape. The storage hollow portion 13 inside the storage portion 12 serves as a receiving portion for the stud bolt 2 as described later. Moreover, the window part 3 is provided left-right symmetrically in the front of the accommodating part 12 of FIG. The storage part 12 side part of FIG. 10 is sealed.
A substantially rectangular insertion hole 14 is provided in the upper surface of the storage portion 12 in FIG. The insertion hole 14 has a mortar shape at the front and back as seen in FIGS. And the groove part 4 is provided in connection with the lower part of a mortar-shaped part. The groove part 4 leads to the bottom part inside the storage part 12. The stud bolt 2 is guided to the housing hollow portion 13 along the groove portion 4. The detailed structure inside the storage hollow portion 13 will be described later.
Except for the insertion hole 14 and the window 3 described above, the storage portion 12 is sealed.

Next, the support portion 15 will be described. The support part 15 is a hollow cylindrical body located in the lower part of the storage part 12 as seen in FIGS. The upper portion of the support portion 15 has the same shape as the storage portion 12 and is integrally connected to the storage portion 12. The lower portion of the support portion 15 is formed wider than the storage portion 12. Further, as shown in FIGS. 6 and 8, support members 17 and 18 stand upright at the center of the support hollow portion 16. That is, the column member 17 stands upright across the support portion 15 from the front surface to the back surface. Similarly, the support member 18 stands upright from the left side surface to the right side surface. And the support | pillar members 17 and 18 are orthogonally crossed in the center part of the support part 15. FIG. For this reason, the part located in the lower part of the accommodating part 12 seeing in FIG. 5 will be supported by the structure in which the column parts are orthogonal. The bottom of the support portion 15 shown in FIG. 11 is sealed.
The hollow shape is intended to reduce the weight of the clamp 10. Then, the support member 15 is provided with a predetermined strength by providing the support members 17 and 18 in the support hollow portion 16.

Next, the clip 20 will be described. In the first embodiment, as shown in FIGS. 3 and 4, four clips 20 are provided at the four corners of the upper surface of the storage portion 12. As shown in FIGS. 7 and 9, the clip 20 and the upper surface of the storage portion 12 are integrally formed. Then, the clip 20 is formed in such a manner that a gentle curve is drawn from the upper surface of the storage portion 12 toward the support portion 15 and projects in the side direction.
Then, the clips 20 that are in contact with each other with the storage portion 12 in between are bent and deformed in a direction in which they approach each other. That is, it elastically deforms in the direction of the storage portion 12 so that the interval between the clips 20 is reduced.
Thereby, the clamp 10 and the protector 1 are clip-fitted. According to this clip fitting, the clamp 10 can be attached to the protector 1 with one touch. That is, workability is good.

Next, the grip member 30 will be described. In the first embodiment, as shown in FIGS. 4 and 11, it is formed so as to extend around the lower portion of the support portion 15. 6 and 8, the sectional structure has a predetermined thickness.
By taking the above configuration, the protector 1 fitted with the clip can be reliably supported. In other words, the gripping member 30 in a position for supporting the protector 1 has a predetermined cross-sectional area. For this reason, the holding member 30 does not fall off due to the weight of the protector 1.

Next, the internal structure of the storage hollow portion 13 will be described.
A hinge part 40 is provided in the storage part 12 and the storage hollow part 13. In Example 1, four hinge parts 40 are formed as seen in FIGS. 5 and 13. Two hinge parts 40 are arranged as a set. That is, the two hinge parts 40 are disposed inside the storage portion 12 so as to be axially symmetric with respect to the stud bolt insertion axis. In the first embodiment, two sets of hinge portions 40 provided at both axially symmetrical positions of the stud bolt 2 are provided along the stud bolt insertion direction.
Three or more sets of hinge portions 40 may be provided along the stud bolt insertion direction. This is because the stud bolt holding force is improved. Conversely, a set may be used. The number of hinge portions 40 can be set according to the required holding force.

The hinge part 40 includes an arm part 41, a locking piece 42, and an engaging protrusion 43.
The inner wall surface 19 of the storage portion is connected by an arm portion 41. In the first embodiment, as shown in FIG. 13, the arm portion 41 is provided integrally with the inner wall surface 19 of the storage portion. A slight inclination is given to the stud bolt insertion direction. The stud bolt 2 is inserted along this inclination.
The arm portion 41 can be bent and deformed. That is, the arm portions 41 that are in contact with each other across the stud bolt insertion axis can be deformed in a direction toward or away from each other.
In the first embodiment, the arm portion 41 is made of resin and can be bent and deformed.

  A locking piece 42 is provided at the tip of the arm portion 41. As shown in FIGS. 13 and 14, the locking piece 42 is located at the tip of the arm portion 41 in the present embodiment. The locking piece 42 has a substantially rectangular cross section. And it arrange | positions so that the elongate surface of the locking piece 42 may face the accommodation hollow part 13 side. For this reason, in Example 1, as shown in FIG. 13, the long surfaces of the locking pieces 42 face each other for each set of hinge parts. The locking piece 42 is also made of resin.

An engaging protrusion 43 is provided on the long surface of the locking piece 42 on the side of the housing hollow portion 13. The two engaging protrusions 43 are provided so as to be connected in the stud bolt insertion direction. As shown in FIG. 13, in the first embodiment, two engaging protrusions 43 are provided on the long surface of the locking piece 42 on the side of the housing hollow portion 13. That is, the first engagement projection 43a is provided on the locking piece 42 top as viewed in FIG. 14, the second engagement projection 43b is al provided in the locking piece 42 lower so as to articulate it.

The shape of the second engagement protrusion 43 b is formed corresponding to the groove shape of the stud bolt 2. That is, as shown in FIGS. 14-17, the peak part 2a of the stud bolt 2 and the valley part 44b between each engagement protrusion 43a, 43b are formed correspondingly. Similarly, a valley portion 2b of the stud bolt 2 and a mountain portion 44a of the second engagement protrusion 43b are formed correspondingly. And the surface (flank surface 2c) which connects the peak of a stud bolt 2 and a valley bottom, and the engagement surface 45 of the 2nd engagement protrusion 43b will be formed correspondingly.
In the corresponding state, the angle of the first engagement surface 45c of the second engagement protrusion 43b is formed at substantially the same angle as the corresponding stud bolt groove shape angle. Normally, a slightly downward angle with respect to the insertion direction is given, but as shown in FIG.

On the other hand, in the first embodiment, the angle of the first engagement surface 45a of the first engagement protrusion 43a is formed larger than the groove shape angle of the stud bolt 2. That is, as shown in FIG. 16, the angle of the first engagement surface 45 a of the first engagement protrusion 43 a is formed larger than the angle of the flank surface 2 c of the stud bolt 2. That is, the first engagement surface 45a angle of the first engagement protrusion 43a is formed as an angle greatly inclined in the stud bolt insertion direction.
The other surfaces and portions of the first engagement protrusion 43a are formed substantially corresponding to the groove shape of the stud bolt 2. Here, “corresponding substantially” means that at least the next engaging surface 45b of the first engaging protrusion 43a and the stud bolt groove shape corresponding thereto should correspond.

  Each engagement protrusion 43a, 43b is made of resin. Here, the hinge part 40 of the first embodiment comprising the arm portion 41, the locking piece 42, and the engaging protrusions 43a and 43b is all made of resin and integrally formed.

Next, the operation and effect of the clamp 10 according to the first embodiment will be described.
First, the insertion load when the stud bolt is inserted will be described. As described above, the angle of the first engagement surface 45a of the first engagement protrusion 43a is formed as an angle greatly inclined in the stud bolt insertion direction. For this reason, the deformation | transformation to the outward of the hinge part 40 at the time of insertion becomes easy. As a result, most of the insertion load of the stud bolt 2 can be applied to the first engagement surface 45a of the first first engagement protrusion 43a as an acting force that deforms outward. That is, the force in the insertion direction generated when the stud bolt 2 is inserted is received by the first engagement surface 45a of the first engagement protrusion 43a. Then, the direction of the force is efficiently changed in the direction in which the hinge part 40 opens (expands) while expanding, that is, the outward direction. As a result, the entire hinge part 40 can be elastically deformed and expanded in the direction of expanding. Thereby, the insertion load of the clamp 10 with respect to the stud bolt 2 can be reduced. For this reason, workability is improved. Moreover, it is not necessary to forcefully insert the stud bolt 2.

  In the first embodiment, the insertion load of the second engagement protrusion 43b is also reduced. That is, first, when the stud bolt 2 and the first engagement protrusion 43a come into contact with each other, the entire hinge part 40 is expanded. Along with this, the position of the second engagement protrusion 43b moves in the expanding direction. Therefore, the first engagement surface 45c of the second engagement protrusion 43b has an angle greatly inclined in the stud bolt insertion direction. As a result, most of the insertion load of the stud bolt 2 can be applied to the first engaging surface 45c of the second engaging protrusion 43b as an acting force that deforms outward. In other words, the first engagement surface 45c of the second engagement protrusion 43b does not need to be formed with an inclined angle.

  Next, the holding force of the hinge part 40 with respect to the stud bolt 2 is demonstrated. As described above, the locking piece 42 is provided at the tip of the hinge part 40. The locking piece 42 elastically supports the stud bolt 2. That is, when an external pressure is applied to the locking piece 42 so as to open outward, the arm portion 41 first bends outward and deforms to absorb the external pressure. And the elastic force which tries to return to the arm part 41 which spread outward to some extent is generated. This force is transmitted to the locking piece 42. And the force which the locking piece 42 elastically pushes the stud bolt 2 will be born. The force that pushes out using elastic force in this way is called elastic force. As described above, the locking piece 42 holds the stud bolt 2 from both sides. As a result, the locking piece 42 is supported with elasticity from both sides of the stud bolt 2. Supporting with elasticity like this is called support for elasticity. This creates a strong holding power. In this way, the holding force of the stud bolt 2 is maintained.

Next, the holding force of the engaging protrusion 43 with respect to the stud bolt 2 will be described. The second engagement protrusion 43 b is formed corresponding to the groove shape of the stud bolt 2. Further, portions other than the first engagement surface 45a of the first engagement protrusion 43a also substantially correspond to the groove shape of the stud bolt 2. For this reason, the engagement protrusion 43 and the stud bolt 2 outer peripheral groove are reliably engaged. This creates a strong holding power.
Further, with this structure, it is not necessary to load a special structure or element on the storage unit 12. This simplifies the structure and facilitates manufacture.

  From the above, the clamp 10 in the first embodiment reduces the stud bolt insertion load while maintaining the holding force with respect to the stud bolt 2.

  Further, as described above, the hinge portion 40 of the first embodiment is made of resin and is integrally formed. For this reason, weight reduction of the hinge part 40 is achieved. Moreover, the elastic deformation of the hinge part 40 at the time of insertion can be performed easily.

  The material of the clamp 10 is polyethylene, polystyrene, polypropylene, synthetic resin (AS resin) copolymerized mainly with styrene and acrylonitrile, synthetic resin (ABS resin) copolymerized mainly with styrene, acrylonitrile and butadiene, etc. It is preferable that it is a resin. The above resins are well on the market. For this reason, it is possible to obtain inexpensive and high-quality raw materials. Note that paper, wood, metal, or the like may be used as long as the clip 20 functions.

[Other examples]
Although the main implementation of the present invention has been described above, the form for carrying out the present invention is not limited to the above-described embodiment, and can be implemented as various other embodiments.
First, the same angle as the angle of the first engagement surface 45a of the first engagement protrusion 43a can be given to the first engagement surface 45c of the second engagement protrusion 43b. Thereby, the insertion load of the clamp 10 can be further reduced. That is, workability at the time of insertion is further improved. In particular, the clamp 10 such as a temporary fixing work where workability is more important can be used. In this embodiment, the holding force is slightly reduced as compared with the first embodiment, but a desired holding force is ensured.

  Next, two or more engaging protrusions 43 described above can be provided. This is because the holding force is further improved. At this time, the angle of the first engagement surface 45a of the first engagement protrusion 43a is formed as an angle greatly inclined in the stud bolt insertion direction as in the first embodiment. The engagement protrusions 43 other than the first engagement protrusions 43a are desirably formed corresponding to the groove shape angle of the stud bolt 2. This is because the holding force is improved and the insertion load itself can be kept low. That is, as described above, the hinge portion 40 is first expanded by the first engagement protrusion 43a. Along with this, the position of the second engagement protrusion 43b moves in the expanding direction. Therefore, the first engagement surface 45c of the second engagement protrusion 43b has an angle greatly inclined in the stud bolt insertion direction. In this way, since the first engagement surface 45n of the engagement protrusion 43 is sequentially angled, the insertion load is reduced.

Next, although the clip 20 is used in the said Example, it can also have a belt comprised by the buckle part which has a belt part and the insertion path for making a belt part penetrate. According to this configuration, the belt portion is wound around the protector 1. And the front-end | tip of a belt can be fixed with a buckle part. For this reason, it is not necessary to provide a hole for attaching the clamp 10 to the protector 1. Moreover, since a hole is not provided in the center part of the protector 1, the protector 1 in which more electric wires 1b are accommodated can be attached to the automobile. The belt part can also be attached and detached.
Further, the clamp 10 and the protector 1 may be fixed with an adhesive. Thereby, it is not necessary to make a hole in the protector 1, and the working efficiency is improved.

  Next, in the first embodiment, the clamp 10 and the protector 1 are separated from each other, but the clamp 10 and the protector 1 may be integrally formed. This reduces the number of parts. That is, since it is not necessary to manage the clamp 10 and the protector 1 separately, work efficiency is improved.

  Next, the depth inside the storage portion 12 and the length of the stud bolt 2 to be inserted can be formed correspondingly. Thereby, when the insertion is completed, the stud bolt 2 and the bottom surface of the storage portion 12 collide with each other. Therefore, since the insertion completion can be known as a bodily sensation, workability is further improved.

  Next, the clamp 10 can integrally mold the main body 11 and the clip 20. Thereby, formation of the clamp 10 becomes easy.

  Next, a lid can be provided on the window 3 of the clamp 10. This prevents muddy water and stones from entering from the outside. This is particularly effective for the clamp 10 attached outside the vehicle body. Moreover, a lid can be provided in the insertion hole 14. As a result, no muddy water or stones enter from outside during transport.

  In the above-described embodiment, the stud bolt clamp 10 of the wire cable protector 1 has been exemplified. However, the stud bolt clamp 10 is widely applicable to the stud bolt clamp 10 to which an attachment is attached using the stud bolt 2.

  The stud bolt clamp of the present invention can be applied to an operation of attaching a member such as a protector to a vehicle body such as an automobile.

It is a layout drawing of a protector. It is a related figure of a stud bolt, a protector, and a clamp. It is a perspective view of the clamp of Example 1. It is a top view of the clamp of Example 1. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is a front view of the clamp of Example 1. It is a side view of the clamp of Example 1. It is a bottom view of the clamp of Example 1. It is sectional drawing at the time of the attachment state of the clamp of Example 1. FIG. FIG. 6 is an enlarged view of FIG. 5. It is an enlarged view of the engagement protrusion of the clamp of Example 1. It is sectional drawing at the time of the attachment start of the clamp of Example 1 and a stud bolt. It is sectional drawing at the time of the attachment state of the clamp of Example 1 and a stud bolt. It is an enlarged view of a stud bolt.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric wire cable protector 1a Hole 1b on a protector Electric wire cable 2 Stud bolt 2a Mountain part 2b Valley part 2c Flank surface 3 Window part 4 Groove part 10 Stud bolt clamp 11 Main body 12 Storage part 13 Storage hollow part 14 Insertion hole 15 Support part 16 Support hollow parts 17 and 18 Supporting member 19 Internal wall surface 20 Clip 30 Grip member 40 Hinge part 41 Arm part 42 Locking piece 43 Engagement protrusion 43a First engagement protrusion 43b First engagement protrusion 44a Mountain part 44b Valley part 45 Engagement surface 45a, 45c, 45n First engagement surface 45b Next engagement surface A

Claims (3)

A stud bolt clamp that is attached to a mounting part and is attached to a mounting part by being fitted and inserted into a stud bolt that is erected on the mounting part.
A hinge portion having a shape that can be bent in the insertion direction and the outward direction is provided at least at both axially symmetrical positions of the stud bolt, and the tip of the hinge portion forms a locking piece that elastically supports the stud bolt. The engaging piece is formed with a plurality of engaging projections corresponding to the groove shape of the stud bolt so as to be engaged with the groove of the stud bolt. The angle of the engagement surface of the first engagement protrusion is larger than the groove shape angle of the corresponding stud bolt, and the angle of the engagement surface of the remaining engagement protrusion is different from the first engagement protrusion Are formed at the same angle as the groove shape angle of the corresponding stud bolt . The stud bolt clamp according to claim 1,
A stud bolt clamp, wherein a plurality of sets of hinge portions with the tip as a locking piece are provided along a stud bolt insertion direction. The stud bolt clamp according to claim 1 or 2,
The hinge for a stud bolt, wherein the hinge part is made of resin.

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