JPH08200320A - Part installation structure - Google Patents

Abstract

PURPOSE: To provide a parts installation structure which simplifies installation operation, enlarge adaption scope of thickness of substances, and dispenses with a cylindrical body for regularting height. CONSTITUTION: In a parts installation structure 19, a substance 20 is installed on an object 21 by the use of a bush 15 provided on the substance 20 and a bolt penetrating the bush, and a nut 17 screwed with the nut 17. The bush 15 is composed of a hollow cylindrical part 23 and a first flange 24 formed on one end of the cylindrical part. A part adjacent to an upper end of the cylindrical part 23 has flexiblity so as to form a second flange 31. The cylindrical part 23 of the bush is inserted into an installation hole of the substance 20. The first flange 24 is in contact with one surface of the substance 20. The bolt is inserted into the through hole of the bush. By screwing the nut 17, the substance 20 is installed on the object 21. Axial compression force is applied to an upper end of the cylindrical part by means of the nut 17 to form the second flange 31. The bush 15 is installed on the object.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bush that is attached to a mounting part by a portion that penetrates a mounting hole of the mounting part and projects outward in the radial direction at both ends of the hole, and a fixture that penetrates the bush. The present invention relates to a component mounting structure for mounting a mounting component on a member to be mounted.

[0002]

2. Description of the Related Art FIG. 1 shows a conventional component mounting structure 1. This component mounting structure 1 penetrates the mounting hole 3 of the mounting component 2 and projects radially outward at both ends of the hole.
The attachment component 2 is attached to the attachment target member 11 by a bush 7 attached to the attachment component 2 by the flange 5 and the second flange 6, and a fastener formed by a bolt 9 and a nut 10 penetrating the bush. The vibration is generated by the mounting component 2 such as a motor, and the vibration is not transmitted to the mounted member 11 by forming the vibration damping material such as rubber. In this mounting structure, a tubular body 13 is mounted inside the bush 7 in order to regulate the tightening height of the nut.

[0003]

As described above, in the conventional component mounting structure, the bobbin-shaped bush is used, and the diameter of the flange of the bush is considerably larger than the mounting hole of the mounting component. Installation was troublesome. Further, it is necessary to determine the height of the shaft portion between both flanges according to the thickness of the mounting parts, and it is necessary to prepare various kinds of bushes. Further, since the tubular body for restricting the tightening height of the fixing tool is simply sandwiched, it causes the nut to be loosened by vibration.

In addition to the above-described component mounting structure, in order to attach a mounting component such as an emblem to a mounted member such as a vehicle body, Japanese Utility Model Publication No. 4-43613 uses bolts and nuts as fasteners, and bolt heads. It shows a structure in which a portion is attached to a mounting part, and a spacer made of a hollow cylindrical body is mounted on a shaft part of a bolt extending from the mounting part by screwing a nut. In this structure, the outer diameter of the spacer before tightening the nut is formed to be equal to or slightly smaller than the size of the mounting hole of the panel, and a part of the spacer is radially outward by strong tightening by screwing the nut. The mounting component is mounted on the mounted member by projecting and the protruding portion coming into contact with the back surface of the mounted member. This part mounting structure is convenient for mounting mounting parts such as emblems to the mounted member such as the vehicle body, but since the heads of the bolts are mounted on the mounting parts in advance, mounting with a bush interposed It is not suitable for mounting parts on mounted members.

Therefore, it is an object of the present invention to provide a component mounting structure which is easy to mount, has a wide range of thickness of mounting components, and does not require a cylindrical body for height regulation. is there.

[0006]

In order to achieve the above object, according to the present invention, the mounting component is formed by a portion penetrating through the mounting hole of the mounting component and protruding outward in the radial direction at both ends of the mounting hole. A component mounting structure for mounting the mounting component to the mounted member by using a bush attached to the bush and a fastener penetrating the bush, wherein the bush is a hollow cylindrical body portion, and the cylindrical body portion. Formed on one end of the
A through hole for the fastener is formed in the tubular portion and the first flange, and at least a portion of the tubular portion of the bush adjacent to the other end is fixed to the other end. It is made flexible so as to project outward in the radial direction by the axial compression force of the tool to form the second flange, and the tubular portion of the bush is inserted into the attachment hole of the attachment part to form the second flange. A first flange is in contact with one surface of the mounting component, the fastener is inserted into a through hole of the bush to mount the mounting component on the mounted member, and the other end of the tubular body portion. A component mounting structure is provided in which a portion adjacent to the other end of the tubular body portion is formed on the second flange that is in pressure contact with the other surface of the mounting component by applying an axial compressive force to the second flange. It

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First, a component mounting structure according to the first embodiment of the present invention will be described with reference to FIGS. In the component mounting structure of the first embodiment, the bush 15 shown in FIGS. 2 to 4 is used, and as shown in FIGS. 5 to 7, bolts 16 and nuts 17 are used as fasteners. Then, in this component mounting structure 19, the mounting component 20 is mounted on the mounted member 21 as shown in FIG. 7 through the state before mounting in FIG. 5 and the state in the middle of mounting in FIG.

The details of the bush 15 are shown in FIGS.
Will be described with reference to. The bush 15 includes a hollow cylindrical body portion 23 having a constant length and a first flange 24 integrally formed at one end of the cylindrical body portion. Is formed with a through hole 25 through which the shaft part of FIG. The bush 15 is preferably formed of a material such as rubber suitable for vibration isolation and heat insulation. As a result, it is possible to prevent the vibration from being transmitted from the mounting parts such as the motor that generate vibration to the mounted members such as the vehicle body, and also to transfer the heat from the mounting parts that generate heat such as the muffler to the mounted members such as the vehicle body. Can be prevented. Further, if the bush 15 is made of an electrically insulating material, the mounting component and the mounted member can be electrically insulated. In the present invention, the bush 15 extends outward in the radial direction to form a second flange at least near the other end (the upper end in FIG. 2, that is, the end without the first flange 24) of the tubular portion. So that it is flexible. Therefore, the bush 15 is preferably made of a material having excellent flexibility such as rubber.

The outer diameter of the cylindrical portion 23 of the bush 15 is equal to or slightly smaller than the size of the mounting hole 27 of the mounting component 20. In addition, a tapered portion 28 is formed on the cylindrical portion 23 so that the other end, that is, the upper end, is tapered from the viewpoint of easy insertion into the mounting hole 27. It is preferable that a ring-shaped projecting portion 29 that is in close contact with the mounted member 21 is integrally formed on the lower surface of the first flange 24 of the bush 15, whereby the bush 15 and the mounted member 21 are tightened by tightening the nut 17. It is possible to obtain high water tightness between and. The outer diameter of the first flange 24 is formed larger than the outer diameter of the mounting hole 27 so as to press the lower surface of the mounting component 20, and the inner diameter of the through hole 25 is
The bolt 16 is formed in such a size that the shaft portion of the bolt 16 passes through. Further, the portion 33 of the through hole 25 on the side of the first flange is tapered so as to expand its diameter toward the end portion, so that the bolt 16 can be easily received. The expanded diameter hole portion 33 can also be used to receive the buildup portion of the welded portion of the bolt 16 to the attached member 21.

As described above, the cylindrical body portion 23 of the bush 15
Is flexible so as to project radially outwardly near the other end or upper end to form a second flange. In order to obtain this flexibility, the bush 15 is made of a material such as rubber as described above. The second
The flange 31 is shown in FIG. Second flange 3
As shown in FIG. 4, in order to easily form 1
Groove 3 in the circumferential direction on the inner surface at a position corresponding to the second flange of No. 3
2 may be formed. Although the number of the groove 32 is one in the illustrated example, a plurality of grooves 32 may be provided, and in some cases, the groove 32 may be formed as a spiral groove. In any case, bush 15
The cylindrical body portion 23 can be formed of any material as long as the vicinity of the upper end thereof projects outward in the radial direction, or can be provided by providing any means such as a groove.

As shown in FIG. 5, the bolt 16 is fixed to the mounted member 21 by welding or the like. The illustrated bolt 16 has a stepped portion including a large diameter portion 35 substantially equal to the inner diameter of the through hole 25 of the bush cylindrical body portion 23 extending from the mounted member 21 to a certain height, and a small diameter screw portion 36 thereon. It is a bolt. Further, as shown in FIG. 5, it is preferable to attach a flat washer 37 and a spring washer 39 to the nut 17 for stable tightening and locking.

In the component mounting structure 19, as shown in FIG. 5, first, the bush 15 is pushed into the bolt 16 to be mounted, and the first flange 24 contacts the mounted member 21. Next, the mounting member 20 is mounted so that the mounting member 20 receives the cylindrical portion 23 of the bush 15 in the mounting hole 27.
1, so that the first flange 24 of the bush 15 also contacts the mounting part 20. Then, the flat washer 37 and the spring washer 39 are pushed into the threaded portion 36 of the bolt 16, and finally the nut 17 is screwed. As shown in FIG. 6, as the nut 17 is screwed in, an axial compressive force is applied to the upper end of the tubular body portion 23, and the portion adjacent to the upper end of the tubular body portion 23 is radiused from the position of the groove 32. Start to bulge outward. Further, when the nut 17 is strongly screwed in, as shown in FIG. 7, the portion adjacent to the upper end of the cylindrical body portion 23 is largely bent to form the second flange 31 that is in pressure contact with the upper surface of the mounting component 20, The attachment component 20 is clamped by the bush 15. Further, the attachment component 20 is firmly attached to the attachment target member 21 by the strong tightening of the nut 17.

As is clear from the above description, in the component mounting structure 19 according to the present invention, the second flange 31 of the bush 15 is first formed by screwing in the nut 17, and before the fastening, the bush is formed. Since 15 has only the first flange 24, the attachment to the attachment component 20 is extremely easy. Further, since the second flange 31 is formed so as to be in pressure contact with the attachment component 20 in accordance with the thickness of the attachment component 20, if the tubular body portion 23 is formed to have a constant length, the thickness of the attachment component is reduced. Wide application range. Further, the second flange 3
Since the nut 17 is strongly tightened to form No. 1, the height-regulating tubular body 13 as shown in FIG. 1 is unnecessary, and the nut is prevented from loosening due to the interposition of the tubular body.
After the fastening, the bush 15 is attached to the mounting component 2
0 and the mounted member 21 are separated from each other, the vibration damping effect is high if the bush 15 is made of a vibration insulating material, and the heat insulating effect is high if the bush 15 is made of a heat insulating material. If the bush 15 is made of an electrically insulating material, its insulating effect is high.

8 and 9 show a modified example of the bush. In the bush 40, the outer diameter of the substantially central portion 43 of the tubular body portion 41 is formed to be slightly larger than the mounting hole of the mounting component. Therefore, the bush 40 can be attached to the attachment component first, and the attachment component with the bush attached can be attached to the attachment target member. For this example, FIG.
0 to 12 will be described. In FIG. 10, the bush 44 has a slightly different shape from the bush 40, but is basically the same. That is, the large diameter portion 45 is attached to the mounting component 2
It has a diameter slightly larger than that of the zero mounting hole 27. As a result, the bush 44 is fitted in the mounting hole 27 of the mounting component 20.
Is inserted, and the first flange 47 is attached in a state of being in contact with the lower surface of the attachment component 20. Therefore, the bush 44 can be sold and delivered with the mounting component 20 attached.

The mounting part 2 up to the place where the mounted member 21 is located
As shown in FIG. 10, the bush 44, the flat washer 37, the spring washer 39, and the nut 17 attached to the attachment part 20 are pushed into the bolt 16 to push the nut 1
Screw 7 in. Next, as shown in FIG. 11, as the nut 17 is screwed in, the cylindrical portion 4 of the bush 44 is
When the portion 49 adjacent to the upper end of 8 begins to bulge outward in the radial direction from the position of the groove 46 and the nut 17 is further strongly screwed in, the portion 49 is greatly bent as shown in FIG. The second flange 49 is pressed against the upper surface of 20. Further, the attachment component 20 is firmly attached to the attachment target member 21 by the strong tightening of the nut 17. In addition,
FIG. 13 shows a state in which the motor 51 is mounted on the vehicle body 52 using the component mounting structure 19 of the first embodiment. In this component mounting structure 19, not only the bush 15 shown in FIGS. 2 to 4 but also the bush 40 shown in FIGS. 8 and 9 and the bush 44 shown in FIG. 10 can be used as the bush. In this example, the vibration of the motor 51 can be prevented from being transmitted to the vehicle body 52.

In the embodiment shown in FIGS. 14 and 15, the fastener is a nut 53 secured to the mounted member 21.
And a bolt 55 that is screwed into the nut 53. The bush 56 used is formed to have a diameter slightly larger than the mounting hole 27 of the mounting component 20 like the bushing shown in FIGS. It is a type that can be preceded by.
The bolt 55 includes a diameter-expanded head portion 57 and a shaft portion 59 extending from the head portion 57 and having a thread formed therein. Also, the shaft 59
Comprises a large diameter portion 60 extending from the head 57 to a certain height and a threaded portion 61 at the tip thereof. The bush 56 is preliminarily attached to the mounting component 20 with the first flange 63 contacting the mounting component 20. Shaft 59 of bolt 55
Is inserted into the through hole of the bush 56 from the side of the first flange 63 with the spring washer 39 and the flat washer 37 interposed. This state is shown in FIG. When the threaded portion 61 of the bolt 55 is screwed into the nut 53 through the mounting hole 64 of the mounted member 21 and is tightly tightened, it is axially compressed to the lower end of the tubular portion 65 of the bush 56, as shown in FIG. Force is applied, this part
It projects outward in the radial direction to form the second flange 67,
The mounting component 20 is clamped by the bush 56, and the mounting component 20 is firmly mounted to the mounted member 21.

Still another embodiment is shown in FIGS. In this embodiment, it comprises a hollow cylindrical stud 68 fixed to the mounted member 21 by welding or the like, and a tapping screw 69 screwed into the hollow portion of the stud 68. In this embodiment, the bush 71 is shown in FIG.
~ Almost the same type as shown in Fig. 4 is used. First, as shown in FIG. 16, the bush 71 is
The first flange 72 is brought into contact with the mounted member 21 by being pushed into the tubular stud 68. Next, the mounting part 20 is arranged on the mounted member 21 so as to receive the cylindrical portion 73 of the bush 71 in the mounting hole 27, and the first part of the bush 71 is attached.
The flange 72 is brought into contact with the mounting part 20. Then, as shown in FIG. 17, the flat washer 37 is inserted, and the tapping screw 69 is screwed into the hollow portion of the cylindrical stud 68. By this screwing, an axial compressive force is applied to the upper end of the cylindrical body portion 73. In addition, the portion adjacent to the upper end begins to project radially outward. Further, if the tapping screw 69 is strongly screwed in, the
As shown in FIG. 8, the portion adjacent to the upper end of the tubular body portion 73 is largely bent to form the second flange 75 that comes into pressure contact with the upper surface of the attachment component 20, and the bush 71 allows the attachment component 2 to be attached.
0 is clamped, and the mounting component 20 is firmly mounted to the mounted member 21.

19 to 21 show another embodiment. In this embodiment, the fastener includes a bolt 77 having a fractured portion 76 fixed to the attached member 21 by welding or the like, and a collar 79 fastened to the bolt 77 and functioning as a nut. More specifically, the bolt 77 is a stepped bolt including a large-diameter portion 80 extending from the mounted member 21 to a certain height and a small-diameter screw portion 81 thereon, and the screw portion 81 has a small-diameter portion. A fractured portion 76 is formed. The collar 79 includes a washer portion 83, a hexagonal portion 84 for removal and reuse after fastening to the bolt 77, and a sleeve portion 85 that is reduced in diameter by a fastening tool and fastened to a threaded portion 81 of the bolt 77. Is integrally formed of a metal material or the like. In this embodiment, the bush 71 is the same as that shown in FIG. A fastening tool and a fastening operation for fastening the collar 79 to the bolt 77 are well known, for example, Japanese Patent Laid-Open No. 61-144415.
No. 6,086,045.

To fasten the collar 79 to the bolt 77,
First, as shown in FIG. 19, replace the bush 71 with the bolt 7
7 and the first flange 72 is brought into contact with the mounted member 21. Next, the mounting part 20 is arranged on the mounted member 21 so as to receive the cylindrical portion 73 of the bush 71 in the mounting hole 27, and the first flange 72 of the bush 71 is brought into contact with the mounting part 20. The collar 79 is also pushed in to receive the threaded portion 81 of the bolt 77, and the washer portion 83 of the collar 79 is arranged at the upper end of the bush 71. Then, as shown in FIG. 20, the pair of jaws 88 provided on the nose 87 of the fastening tool grips the threaded portion 81 on the tip side of the fractured portion 76 of the bolt 77, and
A diameter reducing portion 89 on the tip side of the nose 87 is engaged with the sleeve portion 85 of the collar. When the fastening tool is operated, the jaw 88 is strongly pulled upward in the drawing and acts to strongly pull out the threaded portion 81 of the bolt. By the reaction of the bolt pulling out by the jaw 88, the diameter reducing action portion 89 is pushed downward by a strong force and comes into contact with the collar 7.
9 to reduce the diameter of the sleeve portion 85. The pulling-out force of the bolt 77 by the jaw 88 is so strong that the bolt 77 breaks from the breaking portion 76. Due to this strong pulling-out force, the diameter-reducing acting portion 89 causes the inner surface of the sleeve portion 85 of the collar 79 to screw the bolt 77. The collar is fastened to the bolt by matching the face and reducing the diameter.

FIG. 20 shows the jaw 88 retracted and the collar fastened to the bolt. Further, in FIG. 21, the screw portion 81 of the bolt 77 is broken and discarded,
The state where the collar 79 is fastened to the bolt 77 is shown. As described above, due to the reaction force when the collar 79 placed on the upper end of the bush 71 is broken so as to pull out the portion closer to the tip side than the broken portion of the bolt at the time of fastening, the bush 7
Since a compressive force in the axial direction is applied to the upper end of the cylindrical body portion 73 of No. 1, the portion adjacent to the upper end of the bush 71 is bulged outward in the radial direction by fastening the collar, the second flange 75 is formed, and the bush 71 is attached. The component 20 is clamped, and the mounting component 20 is firmly mounted to the mounted member 21 by the collar 79. In addition, when removing and reusing the attachment part 20, the hexagonal portion 84 of the collar 79 may be rotated by a tool or the like.

[0021]

According to the present invention, the bush is composed of a hollow tubular portion and a first flange formed at one end of the tubular portion, and a portion adjacent to the other end of the bush tubular portion is fixed. It is made flexible so as to project outward in the radial direction by the axial compression force of the tool to form the second flange, and the tubular portion of the bush is inserted into the attachment hole of the attachment part to form the first flange.
The flange is in contact with one surface of the mounting part, and the fastener is inserted into the through hole of the bush to mount the mounting part to the mounted member and to apply an axial compressive force to the other end of the tubular portion. Since the portion adjacent to the other end of the cylindrical body is formed as the second flange that is in pressure contact with the other surface of the mounting component, the mounting work is simplified and the applicable range of the thickness of the mounting component is widened. In addition, no height-regulating tubular body is required.

Further, according to the present invention, the bush can be preliminarily attached to the mounting component by forming the outer diameter of the cylindrical portion of the bush to be slightly larger than the mounting hole of the mounting component. The fixing tool can be composed of a bolt fixed to a mounted member and a nut screwed to the bolt, and the bolt is a stepped bolt formed to have a large diameter from the mounted member to a certain height. When set to, the fixed state becomes more stable. The fixing tool may be composed of a nut fixed to the mounted member and a bolt screwed into the nut. The fastener may be composed of a hollow cylindrical stud secured to the mounted member and a tapping screw screwed into the hollow portion of the stud. Further, the fastener is reduced in diameter by a reaction force when the bolt is attached to the member to be attached and has a fractured portion, and the fastener is held so as to pull out a portion on the tip side from the fractured portion of the bolt. The collar may be fastened to the bolt. Further, the bush can be formed of a material having a vibration-proof property to prevent transmission of vibration between the mounting component and the mounted member. Further, it is preferable that an inner peripheral groove that facilitates outward projection in the radial direction is formed in a portion adjacent to the other end of the bush tubular portion.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conventional component mounting structure.

FIG. 2 is a front view of a bush used in the component mounting structure according to the first embodiment of the present invention.

FIG. 3 is a bottom view of the bush of FIG.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a partial cross-sectional view showing a state before mounting in the component mounting structure according to the first embodiment of the present invention.

FIG. 6 is a partial cross-sectional view showing a state during mounting in the component mounting structure according to the first embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing a state after mounting in the component mounting structure of the first embodiment of the present invention.

FIG. 8 is a front view of a modified example of the bush.

9 is a sectional view taken along line BB of FIG.

FIG. 10 is a partial cross-sectional view showing a state before mounting in the component mounting structure of another embodiment of the present invention.

FIG. 11 is a partial cross-sectional view showing a state during mounting in the component mounting structure of the embodiment of FIG.

12 is a partial cross-sectional view showing a state after attachment of the component attachment structure of the embodiment of FIG.

FIG. 13 is a diagram showing an example in which the component mounting structure according to the present invention is applied to mounting a motor.

FIG. 14 is a partial cross-sectional view showing a state before mounting in a component mounting structure according to still another embodiment of the present invention.

FIG. 15 is a partial cross-sectional view showing a state after the component mounting structure of the embodiment of FIG. 14 is mounted.

FIG. 16 is a partial cross-sectional view showing a state before mounting in a component mounting structure according to still another embodiment of the present invention.

FIG. 17 is a partial cross-sectional view showing a partway through the mounting of the component mounting structure of the embodiment of FIG.

FIG. 18 is a partial cross-sectional view showing the component mounting structure of the embodiment of FIG. 16 after mounting.

FIG. 19 is a partial cross-sectional view showing a state before mounting in a component mounting structure according to still another embodiment of the present invention.

FIG. 20 is a partial cross-sectional view showing the component mounting structure of the embodiment of FIG. 19 immediately before mounting.

FIG. 21 is a partial cross-sectional view showing the component mounting structure of the embodiment of FIG. 19 after mounting.

[Explanation of symbols]

 1 Conventional component mounting structure 7 Conventional bush 13 Cylindrical body 15, 40, 44, 56, 71 Bushing 16 according to the present invention 16, 55 Bolt 17, 53 Nut 19 Component mounting structure according to the present invention 20 Mounting component 21 Attached Member 23, 41, 48, 65, 73 Cylindrical part 24, 47, 63, 72 First flange 25 Through hole 27 Mounting hole 31, 49, 67, 75 Second flange 32 Groove 35 Large diameter portion of bolt 36 Volt Screw part 37, 39 Washer 51 Motor (mounting part) 52 Car body (attached member) 68 Cylindrical stud 69 Tapping screw 76 Breaking part 77 Bolt 79 Color 81 Screw part 83 Washer part 84 Hexagonal part 85 Sleeve part 87 Fastening tool Nose 88 Jaw 89 Diameter reducing section

Claims (10)

[Claims] 1. A bush mounted on the mounting component by a portion penetrating through the mounting hole of the mounting component and protruding outward in the radial direction at both ends of the mounting hole, and a fastener penetrating the bush. In the component mounting structure for mounting the mounting component to the mounted member, the bush includes a hollow tubular body portion and a first flange formed at one end of the tubular body portion, and the tubular body portion and the A through hole for the fastener is formed in the flange, and at least a portion of the cylindrical portion of the bush adjacent to the other end is radially outward by the axial compression force of the fastener to the other end. It is made flexible so as to project to a second flange, and the cylindrical portion of the bush is inserted into the mounting hole of the mounting part so that the first flange is attached to one surface of the mounting part. Is in contact with the Is inserted into the through hole of the bush, attaches the attachment component to the attached member, and applies an axial compressive force to the other end of the tubular body portion so that the portion adjacent to the other end of the tubular body portion is A component mounting structure, characterized in that the second flange is formed in pressure contact with the other surface of the mounting component. 2. The component mounting structure according to claim 1, wherein an outer diameter of the cylindrical portion of the bush is formed to be slightly larger than a mounting hole of the mounting component. For bushes. 3. The component mounting structure according to claim 1, wherein the fastener comprises a bolt secured to the mounted member and a nut screwed to the bolt, the bolt being the bush. And a nut for applying an axial compressive force to the other end of the cylindrical body portion of the bush. 4. The component mounting structure according to claim 3, wherein the bolt is a stepped bolt having a large diameter from the mounted member to a certain height. 5. The component mounting structure according to claim 2, wherein the fastener comprises a nut secured to the mounted member and a bolt screwed to the nut, the bolt having a diameter-expanding head. And a shaft portion on which a screw extending from the head portion is formed, the bolt is inserted into a through hole of the bush, and an enlarged diameter head portion of the bolt is axially compressed to the other end of the tubular portion of the bush. Part mounting structure characterized by adding. 6. The component mounting structure according to claim 5, wherein the bolt is a stepped bolt having a large diameter from the head to a certain height. 7. The component mounting structure according to claim 1, wherein the fastener comprises a hollow cylindrical stud secured to the mounted member and a tapping screw screwed into the hollow portion of the stud. The tubular stud is inserted into a through hole of the bush, and the head of the tapping screw applies an axial compressive force to the other end of the tubular portion of the bush. 8. The component mounting structure according to claim 1, wherein the fastener is a bolt having a fractured portion fixed to the member to be attached, and a tip end side of a fractured portion of the bolt held by a fastening tool. And a collar that is fastened to the bolt by reducing the diameter by a reaction force when breaking so as to pull out the portion, the bolt is inserted into the through hole of the bush, and the collar is the tubular portion of the bush. A component mounting structure characterized by applying an axial compressive force to the other end. 9. The component mounting structure according to claim 1, wherein the bush is made of a vibration-proof material. 10. The component mounting structure according to any one of claims 1 to 8, wherein a portion adjacent to the other end of the bush cylindrical portion facilitates outward projection in a radial direction. A component mounting structure having an inner peripheral groove.