JP6512009B2 - Fastening device - Google Patents

Description

  The present invention relates to a fastening device that fastens a member to be fastened by an axial force of a bolt.

BACKGROUND Conventionally, a fastening device is known in which a fastened member is fastened by an axial force of a bolt.
The fastening device described in Patent Document 1 is to fasten the washer, the member to be fastened, and the base in this order by the axial force of the bolt. In this fastening device, the washer side of the bolt head is a tapered surface, and the surface on the bolt head side of the washer is a tapered groove corresponding to the tapered surface of the bolt head. The tapered surface of the bolt head and the tapered groove of the washer are each provided with a plurality of grooves extending radially from the central axis of the bolt.
Furthermore, the disk shaped washer with which this fastening device is provided is inserted in the cylindrical recessed part provided in the to-be-fastened member. Bolt holes are provided in the washer and the recess at positions offset from the center of the circle. Thus, the fastening device regulates the relative rotation between the bolt, the washer and the member to be fastened, and prevents the bolt from loosening.

Unexamined-Japanese-Patent No. 2014-105862

However, in the fastening device described in Patent Document 1, since the tapered portion and the plurality of grooves are provided on the bolt head and the tapered groove and the plurality of grooves are provided on the washer, the configuration of the bolt and the washer becomes complicated. The cost of their parts is high.
Further, in the fastening device described in Patent Document 1, a slight gap for inserting the washer into the recess is provided between the radial outer wall of the washer and the radial inner wall of the recess of the member to be fastened. It is thought that Therefore, when the bolt is tightened, there is a concern that the washer and the member to be fastened rotate relative to each other by the gap.
Furthermore, after the bolt is tightened, when the washer and the member to be fastened rotate relative to each other due to vibration from the outside, the bolt and the washer rotate together, and the bolt may be loosened from the member to be fastened.

  The present invention has been made in view of the above problems, and it is possible to prevent the turning of the bolt and the member to be fastened together at the time of bolt fastening, and to prevent the loosening of the bolt after bolt fastening. Intended to be provided.

Fastening device of the present invention comprises a bolt, the first member being fastened and the second fastened member. The first member to be fastened has a first hole through which the bolt is inserted. The second to-be-fastened member has a second hole through which the bolt is inserted, and a recess in which the first to-be-fastened member is embedded. The first to-be-fastened member and the second to-be-fastened member have inclined portions. The inclined portion is provided on the outer wall of the first fastened member located radially outward of the bolt and the inner wall of the recess of the second fastened member contacting the outer wall of the first fastened member, from the opening side of the recess It inclines to the bolt side toward the bottom side.
The first member to be fastened has a first parallel portion provided parallel to the axis of the bolt on the outer wall of the first member to be fastened located radially outward of the bolt. The second member to be fastened has a second parallel portion provided parallel to the axis of the bolt at a position corresponding to the first parallel portion on the inner wall of the recess. The upper surface of the first fastened member located on the opening side of the recess is perpendicular to the first parallel portion.

  Thereby, at the time of fastening the bolt, the outer wall of the first fastened member constituting the inclined portion and the inner wall of the recess of the second fastened member abut, and the axial force of the bolt causes the first fastened member and the second The to-be-fastened members push each other. Therefore, the fastening device prevents the relative rotation between the first and second members to be fastened at the time of fastening the bolt so that the torque of the bolt and the first and second members can be rotated by the torque of the bolt. It can prevent.

  Furthermore, even after the bolt is tightened, the first member to be fastened and the second member to be fastened are pressed against each other by the axial force of the bolt. Therefore, it is possible to prevent relative rotation between the first and second members to be fastened due to external vibration and the like. Therefore, the fastening device can prevent loosening of the bolt after bolt fastening.

1 is a cross-sectional view of a fastening device according to a first embodiment of the present invention. It is a top view of II direction of FIG. FIG. 5 is a cross-sectional view of a fastening device according to a second embodiment of the present invention. It is a top view of the IV direction of FIG. FIG. 7 is a cross-sectional view of a fastening device according to a third embodiment of the present invention. It is sectional drawing of the fastening apparatus of a comparative example. It is a top view of the VII direction of FIG.

Hereinafter, a plurality of embodiments of the present invention will be described based on the drawings. In addition, the same code | symbol is attached | subjected to a substantially the same structure in several embodiment, and description is abbreviate | omitted.
First Embodiment
A first embodiment of the invention is shown in FIGS. 1 and 2. The fastening device 1 of the first embodiment is to fasten the first fastened member 10 and the second fastened member 20 by the axial force of the bolt 2. A wire harness etc. is illustrated as the 1st to-be-fastened member 10, A transmission etc. are illustrated as the 2nd to-be-fastened member 20. FIG. However, the plurality of to-be-clamped members 10 and 20 which the fastening device 1 fastens are not restricted to them, and the fastening device 1 is applicable to fastening of various to-be-fastened members 10 and 20 each other.

First, the configuration of the fastening device 1 will be described.
As shown in FIG. 1, the bolt 2 included in the fastening device 1 is a so-called general-purpose product, and the head 3, the shaft 4 extending from the head 3, and the opposite side to the head 3 of the shaft 4 The screw 5 is provided at the end of the.
The first fastened member 10 has a first hole 11 through which the shaft 4 of the bolt 2 can be inserted. As shown in FIG. 2, the first fastened member 10 has a rectangular shape when viewed from the axial direction of the bolt 2. The first fastened member 10 may have a non-circular shape, such as a polygonal shape or an elliptical shape, as viewed from the axial direction of the bolt 2.

As shown in FIG. 1, the second fastened member 20 has a second hole 21 through which the shaft 4 of the bolt 2 can be inserted. The inner wall of the second hole 21 is provided with a female screw 22 in which the screw portion 5 of the bolt 2 is screwed.
Moreover, the 2nd to-be-fastened member 20 has the recessed part 23 in which the 1st to-be-fastened member 10 is embedded. The recess 23 has a shape corresponding to the first member 10 as viewed from the axial direction of the bolt 2.

  A first inclined portion 12 is provided on the outer wall of the first fastened member 10 located radially outward of the bolt 2. The first inclined portion 12 is inclined toward the bolt 2 from the opening 28 side of the recess 23 toward the bottom surface 24. The first inclined portion 12 is provided parallel to both sides of the outer wall of the first fastened member 10 across the axis O of the bolt 2 when viewed from the axial direction of the bolt 2. In FIG. 2, the boundary between the lower surface 13 on the bottom surface 24 side of the recess 23 of the first fastened member 10 and the first inclined portion 12 is indicated by a broken line α.

  A second inclined portion 25 is provided at a position corresponding to the first inclined portion 12 in the inner wall of the recess 23 of the second fastened member 20. The second inclined portion 25 is inclined toward the bolt 2 from the opening 28 side of the recess 23 toward the bottom surface 24 at substantially the same inclination angle as the first inclined portion 12. Further, as in the case of the first inclined portion 12, the second inclined portion 25 is also provided in parallel on both sides of the inner wall of the recess 23 across the axis O of the bolt 2 when viewed from the axial direction of the bolt 2. In FIG. 2, the boundary between the bottom surface 24 of the recess 23 and the second inclined portion 25 in the second fastened member 20 is indicated by a broken line β.

  The first inclined portion 12 and the second inclined portion 25 constitute an “inclined portion”. The first inclined portion 12 and the second inclined portion 25 can be brought into contact by any of surface contact, line contact or point contact even if a slight tolerance occurs in their inclined surfaces. A predetermined space 30 is formed between the lower surface 13 of the first fastened member 10 and the bottom surface 24 of the recess 23 in a state where the first inclined portion 12 and the second inclined portion 25 are in contact with each other. There is.

Next, the operation of the fastening device 1 will be described.
As shown in FIG. 1, the shaft 4 of the bolt 2 is inserted from the first hole 11 of the first fastened member 10 into the second hole 21 of the second fastened member 20, and a female screw formed in the second hole 21. Screw the threaded portion 5 of the bolt 2 into 22. Thereby, the axial force F of the bolt 2 acts on the first fastened member 10 and the second fastened member 20. At this time, a force F0 perpendicular to the slope acts on the portion where the first inclined portion 12 and the second inclined portion 25 abut. The force F0 can be decomposed into two component forces F1 and F2. Among these, the component force F 2 acting in the radial direction of the bolt 2 is a force that pushes the first fastened member 10 and the second fastened member 20 to each other in the radial direction of the bolt 2. Here, as described above, the inclined portions 12 and 25 are provided in parallel on both sides of the axis O of the bolt 2 when viewed from the axial direction of the bolt 2. Therefore, relative rotation between the first and second members 10 and 20 is prevented. Therefore, the fastening device 1 can prevent the bolt 2 and the first fastened member 10 from rotating together when the bolt 2 is fastened.

  Further, even after the bolt 2 is fastened, the axial force F of the bolt 2 maintains the component force F2 in which the first fastened member 10 and the second fastened member 20 push each other in the radial direction of the bolt 2. Therefore, even when external vibration is transmitted to the first fastened member 10 or the second fastened member 20, relative rotation between the first fastened member 10 and the second fastened member 20 is prevented. Therefore, the fastening device 1 can prevent the loosening of the bolt 2 after the fastening of the bolt 2.

Here, the fastening device 100 according to the comparative example will be described with reference to FIGS. 6 and 7.
In the fastening device 100 of the comparative example, the second fastened member 120 is not provided with a recess. The first to-be-fastened member 110 is placed on the top surface 121 of the second to-be-fastened member 120. The second fastened member 120 also has a convex portion 122 projecting from the upper surface 121. The convex portion 122 can be in contact with the outer wall 112 of the first fastened member 110 located radially outward of the bolt 2.

  When the bolt 2 is inserted from the first hole 111 of the first fastened member 110 and the screw portion 5 of the bolt 2 is fastened to the female screw 123 of the second fastened member 120, the torque of the bolt 2 causes the first fastened member 110 to 7 rotates in the direction of arrow A in FIG. 7 with respect to the second fastened member 120. At this time, when the outer wall 112 of the first fastened member 110 and the convex portion 122 of the second fastened member 120 abut, relative rotation between the first fastened member 110 and the second fastened member 120 is prevented. .

  However, when the second fastening member 120 and the convex portion 122 are formed by casting, for example, the fastening device 100 of the comparative example is considered to have low shape accuracy or dimensional accuracy of the convex portion 122. In that case, in the fastening device 100 of the comparative example, there is a possibility that the positioning of the first to-be-fastened member 110 and the second to-be-fastened member 120 may be difficult.

  Furthermore, in the fastening device 100 of the comparative example, when external vibration is transmitted to the first fastened member 110 and the second fastened member 120 after the bolt 2 is fastened, the first fastened member 110 is engaged with the second fastened The case where it rotates with respect to the member 120 in the direction of arrow B of FIG. 7 is considered. At this time, when the outer wall 112 of the first fastened member 110 is separated from the convex portion 122 of the second fastened member 120 in the direction of the arrow B, there is a concern that the bolt 2 may be loosened with it.

On the other hand, the fastening device 1 of the first embodiment has the following effects.
(1) In the first embodiment, when the bolt 2 is fastened, the first inclined portion 12 and the second inclined portion 25 abut, and the axial force of the bolt 2 causes the first fastened member 10 and the second fastened member 20 and push each other. Therefore, the fastening device 1 can prevent the turning of the bolt 2 and the first fastened member 10 when the bolt 2 is fastened.
Furthermore, even after the bolt 2 is tightened, the fastening device 1 can prevent relative rotation between the first and second members 10 and 20, and can prevent the bolt 2 from being loosened.

(2) In the first embodiment, the inclined portions 12 and 25 are non-circular as viewed from the axial direction of the bolt 2.
As a result, the first inclined portion 12 and the second inclined portion 25 abut on a plurality of places or continuous places having different distances from the axis O of the bolt 2. Therefore, the fastening device 1 can prevent the turning of the first fastened member 10 at the time of fastening of the bolt 2 and the loosening of the bolt 2 after fastening of the bolt 2.

(3) In the first embodiment, the fastening device 1 has the space 30 between the lower surface 13 of the first fastened member 10 and the bottom surface 24 of the recess 23.
Thereby, it is possible to make the 1st slope 12 and the 2nd slope 25 contact certainly.

Second Embodiment
A second embodiment of the present invention is shown in FIGS.
The 1st to-be-fastened member 10 with which the fastening apparatus 1 of 2nd Embodiment is provided is a plate-shaped member bend | folded by press work etc., and is formed. The first member to be fastened 10 has a first parallel portion 14 formed parallel to the axis O of the bolt 2 on the outer wall located radially outward of the bolt 2. The first parallel portion 14 is provided closer to the bottom surface 24 of the recess 23 than the first inclined portion 12.
The second fastened member 20 has a second parallel portion 26 formed parallel to the axis O of the bolt 2 at a position corresponding to the first parallel portion 14 in the inner wall of the recess 23. The second parallel portion 26 is provided closer to the bottom surface 24 of the recess 23 than the second inclined portion 25.

  In the first fastened member 10, the upper surface 15 of the first fastened member 10 located on the opening 28 side of the recess 23 is formed perpendicular to the first parallel portion 14. Therefore, in a state where the first parallel portion 14 of the first fastened member 10 and the second parallel portion 26 of the second fastened member 20 are in contact with each other, the upper surface 15 of the first fastened member 10 is the shaft of the bolt 2 It is perpendicular to O. Therefore, the fastening device 1 can make the upper surface 15 of the first fastened member 10 parallel to the upper surface 27 of the second fastened member 20.

  Furthermore, in the second embodiment, the lower end portion 16 of the first fastened member 10 located on the bottom surface 24 side of the recess 23 abuts on the bottom surface 24 of the recess 23. On both sides of the first fastened member 10 sandwiching the axis O of the bolt 2, the distances γ1 and γ2 between the lower ends 16 and 16 of the first fastened member 10 and the upper surface 15 of the first fastened member 10 are the same. is there. Further, the bottom surface 24 of the recess 23 is perpendicular to the axis O of the bolt 2. Therefore, in a state where the lower end portions 16 and 16 of both sides of the first fastened member 10 sandwiching the axis O of the bolt 2 and the bottom surface 24 of the recess 23 in the second fastened member 20 abut, the first fastened The upper surface 15 of the member 10 is perpendicular to the axis O of the bolt 2. Therefore, the fastening device 1 can make the upper surface 15 of the first fastened member 10 parallel to the upper surface 27 of the second fastened member 20.

  In the second embodiment, the first inclined portion 12 and the second inclined portion are in a state where the lower end portion 16 of the first fastened member 10 and the bottom surface 24 of the concave portion 23 abut each other when the bolt 2 is tightened. The case where it becomes noncontact with 25 is assumed. However, even in this case, in the second embodiment, since the first fastened member 10 is formed of a plate-like member, the plate-like member is bent by the axial force of the bolt 2 and the first inclined portion 12 And the second inclined portion 25 abut. Therefore, the fastening device 1 can prevent the turning of the bolt 2 and the member to be fastened at the time of fastening the bolt 2. Furthermore, even after the fastening of the bolt 2, the fastening device 1 can prevent relative rotation between the first fastened member 10 and the second fastened member 20 and can prevent the bolt 2 from being loosened.

The fastening device 1 of the second embodiment has the following effects.
(1) In the second embodiment, the first fastened member 10 has the first parallel portion 14 provided parallel to the axis O of the bolt 2, and the second fastened member 20 corresponds to the first parallel portion 14. And the second parallel portion 26 provided parallel to the axis O of the bolt 2. Further, the upper surface 15 of the first fastened member 10 is perpendicular to the first parallel portion 14.
As a result, when the first parallel portion 14 and the second parallel portion 26 abut on each other, the upper surface 15 of the first fastened member 10 becomes perpendicular to the axis O of the bolt 2. Therefore, the fastening device 1 can make the upper surface 15 of the first fastened member 10 parallel to the upper surface 27 of the second fastened member 20.

(2) In the second embodiment, the lower ends 16 and 16 of the first fastened member 10 and the bottom surface 24 of the recess 23 abut on both sides of the first fastened member 10 sandwiching the axis O of the bolt 2 In this state, the upper surface 15 of the first fastened member 10 is perpendicular to the axis O of the bolt 2.
Thereby, it is possible to make the upper surface 15 of the first fastened member 10 perpendicular to the axis O of the bolt 2.

(3) In the second embodiment, the first member to be fastened 10 is formed by bending a plate-like member.
Even when the lower end portion 16 of the first member to be fastened 10 and the bottom surface 24 of the recess 23 abut, the plate-like member is bent to abut the first inclined portion 12 and the second inclined portion 25. Is possible.

Third Embodiment
A second embodiment of the invention is shown in FIG.
The first fastened member 10 provided in the fastening device 1 of the third embodiment has a first inclined portion 12 and a first parallel portion 14. The second fastened member 20 has a second inclined portion 25 and a second parallel portion 26. A predetermined space 30 is formed between the lower surface 13 of the first fastened member 10 and the bottom surface 24 of the recess 23 in a state in which the first inclined portion 12 and the second inclined portion 25 abut.

Also in the third embodiment, the upper surface 15 of the first fastened member 10 and the upper surface 27 of the second fastened member 20 are made parallel by the first parallel portion 14 and the second parallel portion 26 being in contact with each other. It is possible.
Further, also in the third embodiment, since the first inclined portion 12 and the second inclined portion 25 push each other, the fastening device 1 prevents corotation of the bolt 2 and the member to be fastened when the bolt 2 is fastened. And loosening of the bolt 2 after fastening of the bolt 2 can be prevented.

(Other embodiments)
(1) In the embodiment described above, the screw portion 5 of the bolt 2 is screwed into the female screw 22 formed in the second hole 21 of the second member 20 to be fastened. On the other hand, in another embodiment, the screw portion 5 of the bolt 2 may be protruded from the second hole 21 of the second fastened member 20 and a nut may be attached thereto.

(2) In the embodiment described above, the bolt 2 is inserted into the second hole 21 of the second fastened member 20 from the first hole 11 of the first fastened member 10. On the other hand, in another embodiment, the bolt 2 is inserted from the second hole 21 of the second fastened member 20 into the first hole 11 of the first fastened member 10, and the upper surface 15 of the first fastened member 10 A nut may be attached. Alternatively, a female screw may be formed in the first hole 11 of the first member 10 to be fastened, and the screw portion 5 of the bolt 2 may be screwed into the female screw.

(3) In the embodiment described above, the fastening device 1 uses the bolt 2 having the head 3, the shaft 4 and the screw 5. On the other hand, in another embodiment, the fastening device 1 may use bolts in which female threads are formed at both end portions of the shaft portion 4.

(4) In the embodiment described above, the entire first to-be-fastened member 10 is embedded in the recess 23 of the second to-be-fastened member 20. On the other hand, in another embodiment, at least a part of the first fastened member 10 may be embedded in the recess 23 of the second fastened member 20.
Thus, the present invention is not limited to the above-described plurality of embodiments, and in addition to combining the above-described plurality of embodiments, the present invention can be practiced in various forms without departing from the spirit of the invention .

1 · · · Fastening device 2 · · · Bolt 10 · · · First to-be-fastened member 11 · · · first hole 12 · · · first inclined portion (inclined portion)
20 ... 2nd to-be-fastened member 21 ... 2nd hole 23 ... recessed part 24 ... bottom face 25 ... 2nd inclined part (inclined part)

Claims (7)

With the bolt (2)
A first fastened member (10) having a first hole (11) through which the bolt is inserted;
A second fastened member (20) having a second hole (21) through which the bolt is inserted, and a recess (23) in which the first fastened member is embedded;
Equipped with
The first member to be fastened and the second member to be fastened contact the outer wall of the first member to be fastened located radially outward of the bolt and the second member to be fastened to the outer wall of the first member to be fastened It has an inclined portion (12, 25) provided on the inner wall of the recess of the member and inclined toward the bolt from the opening (28) side of the recess toward the bottom (24) side ,
The first member to be fastened has a first parallel portion (14) provided parallel to the axis (O) of the bolt on the outer wall of the first member to be fastened located radially outward of the bolt;
The second fastened member has a second parallel portion (26) provided parallel to the axis of the bolt at a position corresponding to the first parallel portion on the inner wall of the recess,
The fastening device in which the upper surface (15) of said 1st to-be-fastened member located in said opening side of said recessed part is perpendicular | vertical with respect to said 1st parallel part . The lower end portion (16) of the first fastened member located on the bottom side of the recess abuts on the bottom of the recess on both sides of the first fastened member sandwiching the axis of the bolt in the state, the upper surface of the first member to be fastened, the fastening device according to claim 1 which is perpendicular to the axis of the bolt. Said lower surface (13) of the bottom side of the recess in the first member being fastened, the fastening device according to claim 1 and has a space (30) between said bottom surface of said recess. The inclined portion is
A first inclined portion (12) provided on an outer wall of the first member to be fastened located radially outward of the bolt;
A second inclined portion (25) provided at a position corresponding to the first inclined portion in the inner wall of the concave portion of the second fastened member;
Fastening device according to any one of claims 1 to 3 and has a. The fastening device according to any one of claims 1 to 4, wherein the inclined portion is non-circular when viewed from the axial direction of the bolt. A fastening device used for fixing a wire harness in a transmission, comprising:
With the bolt (2)
A first fastened member (10) having a first hole (11) through which the bolt is inserted;
A second fastened member (20) comprising a single member and a second hole (21) through which the bolt is inserted, and a recess (23) in which the first fastened member is embedded;
Equipped with
The first member to be fastened is provided on the outer wall of the first member to be fastened located radially outward of the bolt, and from the opening (28) side of the recess of the second member to the bottom (24) side Having a first inclined portion (12) inclined toward the bolt side
The second inclined member is provided at a position corresponding to the first inclined portion in the inner wall of the concave portion, and is a second inclined portion (inclined toward the bolt side from the opening side of the concave portion toward the bottom surface) 25) and
The fastening device wherein the first inclined portion and the second inclined portion are non-circular when viewed from the axial direction of the bolt . The fastening device according to any one of claims 1 to 6 , wherein the first member to be fastened is formed by bending a plate-like member.

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