JP2012219823A - Screw grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress an axial force from being reduced by creeps and from being changed by variation in thickness of a mounted member such as a panel as well as enabling the axial force to be set high by using a metal plate for a screw grommet.SOLUTION: A screw grommet 10 includes: a grommet 30 including a flange 60 and a shaft 70; and a metal plate 40 which is mounted turnably to the grommet 30 and includes a base with which a screw hole 43 is formed on the same axis as an insertion hole 80, and a leg 42 which extends toward the flange 60 and is opposed with a backside of the flange 60. The shaft 70 is inserted into a mounting hole of a mounted member 20 such as a panel and a tapping screw 50 is fastened into the screw hole 43, thereby turning the metal plate 40 and moving in the axial direction. Thus, the mounted member 20 is held between the backside of the flange 60 and the leg 42.

Description

  The present invention relates to a screw grommet, which not only allows a high axial force to be set by using a metal plate, but also reduces the axial force due to creep and varies the thickness of a mounted member such as a panel. A change in axial force can be suppressed.

Conventionally, there is known a first screw grommet in which a distal end portion enters the inside of a leg portion by tightening a screw to expand the leg portion (for example, paragraph number “0018” in Patent Document 1, FIGS. 4 and 5). reference).
Conventionally, there is known a second screw grommet that is deformed so that a column protrudes by screw tightening (see, for example, paragraph number “0010” in FIG. 10 and FIG. 11).

Conventionally, there is known a fastener in which a turn nut rotates when a screw is inserted and the turn nut is wound up by screw tightening (see, for example, paragraph number “0017” and FIGS. 1 to 3 of Patent Document 3).
Conventionally, there is known a grommet nut that has claws at the top and bottom of a metal plate and energizes when a screw is tightened (see, for example, paragraph number “0009” of Patent Document 4 and FIGS. 1 and 2).

JP 2010-43728 A Japanese Patent Laid-Open No. 2001-140825 Japanese Patent Laid-Open No. 2002-147422 JP 09-72323 A

However, the above-described conventional first screw grommet (Japanese Patent Laid-Open No. 2010-43728) employs a structure in which the tip portion enters the inside of the leg portion by screw tightening and the leg portion is expanded. The first problem is that the axial force is reduced due to creep, the axial force is changed due to the variation in the panel thickness, and it is difficult to remove after installation.
The above-described conventional second screw grommet (Japanese Patent Laid-Open No. 2001-140825) employs a structure in which the struts are projected by screw tightening, so the torque resistance cannot be set high, and the holding force and axial force are not high. There was a second problem of low.

Since the conventional fastener described above (Japanese Patent Laid-Open No. 2002-147422) uses a turn nut, there is a third problem that a large space is required for the turn nut to rotate.
The above-mentioned conventional grommet nut (Japanese Patent Laid-Open No. 09-72323) has a fourth problem that it is difficult to attach the metal plate because it has claws on the top and bottom of the metal plate, and it is easy to come off.

Accordingly, each invention described in each claim has been made in view of the first to fourth problems of the conventional techniques described above, and the object is the following point. .
(Claim 1)
The object of the present invention is as follows.
That is, according to the first aspect of the present invention, not only the axial force can be set high by using a metal plate, but also the axial force is reduced by creep, and the thickness of the mounted member such as a panel is reduced. The change of the axial force due to the variation can be suppressed.
(Claim 2)
The second aspect of the invention has the following object in addition to the object of the first aspect of the invention.

That is, according to the second aspect of the present invention, it is possible to improve the removal force of the screw grommet by forming an allowance between the metal plate and the back surface of the mounting hole when the metal plate is rotated. It is a thing.
(Claim 3)
The invention described in claim 3 has the following object in addition to the object of the invention described in claim 1 or claim 2.

That is, the invention according to claim 3 is configured such that the operation portion of the metal plate can be rotated along the concave portion of the flange portion of the grommet.
According to the third aspect of the present invention, the metal plate can be fastened by simply rotating in the circumferential direction of the flange portion without turning in the axial direction of the shaft portion of the grommet. There is an advantage that the amount of protrusion of the mounting member in the rear side direction can be reduced.
(Claim 4)
The invention described in claim 4 has the following object in addition to the object of the invention described in claim 3 described above.

That is, the invention according to claim 4 is configured such that the operation portion of the metal plate can be easily fitted into the through hole through the slit of the flange portion of the grommet.
According to invention of Claim 4, a metal plate can be wound up through the through-hole of a flange part.
(Claim 5)
The invention described in claim 5 has the following object in addition to the object of the invention described in claim 3 or claim 4.

That is, the invention according to claim 5 is configured such that the rotation of the metal plate can be regulated by bringing the contact portion of the recess of the grommet into contact with the operation portion of the metal plate. .
(Claim 6)
The invention described in claim 6 has the following object in addition to the object of the invention described in claim 5 described above.

That is, the invention according to claim 6 can not only easily hold the operation portion of the metal plate in the recess by the temporary holding claw of the recess of the grommet, but also make it difficult to come off, It can be easily removed.
(Claim 7)
The invention described in claim 7 has the following object in addition to the object of the invention described in claim 4 described above.

That is, the invention according to claim 7 can not only make the operation part of the metal plate easy to pass through the slit by the temporary attachment claw on one side of the slit of the grommet, but also make it difficult to come off after passing, It can be easily removed.
(Claim 8)
The invention according to claim 8 has the following object in addition to the object of the invention according to any one of claims 1 to 7.

  That is, in the invention described in claim 8, the energization part which is an acute angle of the metal plate is made to bite into the back surface of the attached member such as a metal panel at the time of screw fastening, and can be energized. is there.

Each invention described in each claim has been made to achieve each of the above-mentioned objects, and features of each invention will be described below using embodiments of the invention shown in the drawings. .
In addition, the code | symbol in parenthesis shows the code | symbol used in embodiment of invention, and does not limit the technical scope of this invention.
Also, the drawing numbers indicate the drawing numbers used in the embodiments of the invention and do not limit the technical scope of the present invention.
(Claim 1)
The invention described in claim 1 is characterized by the following points.

First, the screw grommet (10) has the following configuration as shown in FIGS.
(1) Grommet (30)
As shown in FIGS. 3 and 4, for example, the grommet (30) includes a flange portion (60) provided with an insertion hole (80) through which the tapping screw (50) is passed, and a shaft portion (70) extending from the flange portion (60). Have

(2) Metal plate (40)
For example, as shown in FIGS. 2, 5, and 6, the metal plate (40) is rotatably attached to the grommet (30), and a screw hole (43) is formed coaxially with the insertion hole (80). The base portion (41) and the leg portion (42) extending toward the flange portion (60) and facing the back surface of the flange portion (60) are provided.
Secondly, as shown in FIGS. 1 and 2, for example, the shaft portion (70) is inserted into the mounting hole (21) of the mounted member (20) such as a panel, and the tapping screw (50) is inserted into the screw hole (43). By screwing in, the metal plate (40) rotates and moves in the axial direction, so that the attached member (20) is held between the back surface of the flange portion (60) and the leg portion (42).
(Claim 2)
The invention described in claim 2 is characterized by the following points in addition to the characteristics of the invention described in claim 1 described above.

First, the base portion (41) of the metal plate (40) has substantially the same shape as the mounting hole (21) of the mounted member (20), as shown in FIG.
Secondly, when the metal plate (40) is rotated, as shown in FIG. 19, for example, an engagement margin is formed between the metal plate (40) and the back surface of the attached member (20).
(Claim 3)
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 1 or claim 2 described above.

First, the leg portion (42) of the metal plate (40) is provided with an operating portion (for example, as shown in FIGS. 5 and 6) extending from the tip portion in the circumferential direction of the screw hole (43). 44) is formed.
Secondly, the flange portion 60 of the grommet 30 is formed with a recess 61 that is recessed from the outer peripheral surface of the grommet 30 so that the operation portion 44 can be rotated. Has been.
(Claim 4)
The invention described in claim 4 is characterized by the following points in addition to the characteristics of the invention described in claim 3 described above.

That is, the flange part (60) of the grommet (30) has a through hole (62) penetrating in the axial direction of the shaft part (70) from the bottom of the recessed part (61), as shown in FIGS. A slit (63) is formed from the outer peripheral surface of the flange portion (60) to the through hole (62) through which the operation portion (44) can pass.
(Claim 5)
The invention described in claim 5 is characterized by the following points in addition to the characteristics of the invention described in claim 3 or claim 4.

That is, on the inner side surface of the recess (61), as shown in FIG. 3, for example, a contact portion (64) that restricts rotation by contacting the operation portion (44) of the metal plate (40) is provided. ing.
(Claim 6)
The invention described in claim 6 has the following features in addition to the features of the invention described in claim 5 described above.

That is, in the recess (61) of the grommet (30), for example, as shown in FIG. 3 and FIG. A temporary holding claw (65) that is flexible is provided.
(Claim 7)
The invention described in claim 7 has the following characteristics in addition to the characteristics of the invention described in claim 4.

That is, the flange part (60) of the grommet (30) has a temporary attachment claw (66) that is positioned at least on one side of the slit (63) and is flexible in the axial direction, as shown in FIGS. Is provided.
(Claim 8)
The invention described in claim 8 is characterized by the following points in addition to the characteristics of the invention described in any one of claims 1-7.

  That is, as shown in FIGS. 5 and 6, for example, as shown in FIG. 5 and FIG. 6, the current-carrying part (45) that makes an acute contact with the back surface of the attached member (20) is attached to the leg part (42) of the metal plate (40). Is provided.

Since this invention is comprised as mentioned above, there exists an effect as described below.
(Claim 1)
According to invention of Claim 1, there exist the following effects.
That is, according to the first aspect of the present invention, not only can the axial force be set high by using a metal plate, but also the reduction of the axial force due to creep and the plate of the mounted member such as a panel. Changes in axial force due to variations in thickness can be suppressed.
(Claim 2)
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the following effect is obtained.

That is, according to the second aspect of the present invention, it is possible to improve the removal force of the screw grommet by forming an allowance between the metal plate and the back surface of the mounting hole when the metal plate rotates. it can.
(Claim 3)
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the following effect is obtained.

That is, according to the third aspect of the invention, the operation portion of the metal plate can be rotated along the concave portion of the flange portion of the grommet.
According to the third aspect of the present invention, the metal plate can be fastened by simply rotating in the circumferential direction of the flange portion without turning in the axial direction of the shaft portion of the grommet. There is an advantage that the amount of protrusion of the mounting member in the rear side direction can be reduced.
(Claim 4)
According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the following effect is obtained.

That is, according to the invention described in claim 4, the operation portion of the metal plate can be easily fitted into the through hole through the slit of the flange portion of the grommet.
According to invention of Claim 4, a metal plate can be wound up through the through-hole of a flange part.
(Claim 5)
According to the invention described in claim 5, in addition to the effect of the invention described in claim 3 or claim 4, the following effect can be obtained.

That is, according to the fifth aspect of the present invention, the rotation of the metal plate can be regulated by bringing the contact portion of the grommet recess into contact with the operation portion of the metal plate.
(Claim 6)
According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the following effect is obtained.

That is, according to the invention described in claim 6, the temporary holding claw of the recess of the grommet can not only easily hold the operation portion of the metal plate in the recess, but also can be made difficult to come off, Moreover, it can be easily removed.
(Claim 7)
According to the invention described in claim 7, in addition to the effect of the invention described in claim 4, the following effect is obtained.

That is, according to the invention described in claim 7, the temporary attachment claw on one side of the slit of the grommet can not only make the operation part of the metal plate easy to pass through the slit but also make it difficult to come off after passing, Moreover, it can be easily removed.
(Claim 8)
According to the invention described in claim 8, in addition to the effect of the invention described in any one of claims 1-7, the following effect is provided.

  That is, according to the invention described in claim 8, the energization part which is an acute angle of the metal plate is made to bite into the back surface of the attached member such as a metal panel when the screw is fastened, and can be energized. Is.

It is sectional drawing which follows the AA line of FIG. It is a perspective view of a screw grommet when attaching to a member to be attached. It is a perspective view of a grommet. It is the perspective view which looked at the grommet of FIG. 3 from the lower side. It is a perspective view of a metal plate. It is the perspective view which looked at the metal plate of FIG. 5 from the other viewpoint. It is a side view at the time of assembling a grommet and a metal plate. FIG. 8 is a plan view of FIG. 7. It is a side view of the rotation state of a metal plate. FIG. 10 is a plan view of FIG. 9. FIG. 10 is a perspective view of FIG. 9. FIG. 5 is a perspective view for explaining the engagement state between a screw grommet and a member to be attached in a state where a tapping screw (not shown) is screwed in. It is the perspective view which looked at FIG. 12 from the lower side. It is a top view of the state which screwed the tapping screw. It is an enlarged view of B part of FIG. It is the side view which inserted the screw grommet in the attachment hole of the to-be-attached member. It is the top view and bottom view of FIG. FIG. 17 is a side view corresponding to FIG. 16 with a tapping screw screwed in. It is the top view and bottom view of FIG. It is a perspective view at the time of reversing a metal plate. It is a perspective view of the 2nd Embodiment of this invention.

In the figure, reference numeral 10 denotes a screw grommet, which is inserted into the mounting hole 21 of the mounted member 20 and mounted as shown in FIG.
The mounted member 20 is a metal panel such as an automobile, has electrical conductivity, and has at least one painted surface. As shown in FIG. 2, the mounting hole 21 penetrates the front and back surfaces of the mounted member 20 and is formed in a substantially rectangular shape.

In addition, although the metal panels, such as a motor vehicle, were illustrated as the to-be-attached member 20, it is not limited to a motor vehicle or metal. Further, although the mounting hole 21 is formed in a square shape, the present invention is not limited thereto, and may be formed in another polygonal shape, a circular shape, an elliptical shape, or the like.
As shown in FIGS. 1 to 6, the screw grommet 10 is roughly composed of the following parts.

The following (1) to (3) will be described later.
(1) Grommet 30
(2) Metal plate 40
(3) Tapping screw 50
The parts of the screw grommet 10 are not limited to the above (1) to (3).
(Grommet 30)
As shown in FIGS. 3 and 4, the grommet 30 includes a flange portion 60 provided with an insertion hole 80 through which a tapping screw 50 described later passes, and a shaft portion 70 extending from the flange portion 60.

The grommet 30 is integrally formed of a thermoplastic synthetic resin having an appropriate rigidity, for example, a POM (polyacetal) resin.
The flange portion 60, the shaft portion 70, and the insertion hole 80 will be described later.
(Metal plate 40)
As shown in FIGS. 2, 5, and 6, the metal plate 40 is rotatably attached to the grommet 30, and faces the base portion 41 having the screw hole 43 coaxially formed with the insertion hole 80 and the flange portion 60. The leg portion 42 extends and faces the back surface of the flange portion 60.

The metal plate 40 is electrically conductive and has an appropriate rigidity, for example, carbon steel is pressed, quenched, and then plated with nickel. The metal plate 40 is not limited to carbon steel, press working, quenching, or nickel plating.
The base 41 is formed in a square shape, and its outer shape is formed to have a size equal to or smaller than the outer shape of the rectangular mounting hole 21 of the mounted member 20, for example, substantially the same shape. When the metal plate 40 is rotated, as shown in FIGS. 13 and 19, the metal plate 40 is placed on the base 41 and the back surface of the mounted member 20, that is, at the both ends of the leg portion 42 in the width direction. The four energizing sections 45 to be described later function as an allowance.

As shown in FIGS. 1, 5, and 6, a screw hole 43 into which a tapping screw 50 (to be described later) can be screwed is formed at the center of the base 41 so as to penetrate the front and back surfaces.
A pair of leg portions 42 extend upward in a channel shape from two opposing sides of the rectangular base portion 41 and face upward.
In addition, although the leg part 42 was made to protrude in the channel shape, it is not limited to this, Moreover, it is not limited to a pair, It is good also as single or 3 or more.

The metal plate 40 includes the following parts as shown in FIGS. 5 and 6 except for the base part 41, the leg part 42, and the screw hole 43.
In addition, each part of the metal plate 40 is not limited to following (1) and (2).
(1) Operation unit 44
As shown in FIGS. 5 and 6, the operation portion 44 extends from the distal end portion of the leg portion 42 in the circumferential direction of the screw hole 43.

The operation part 44 extends in a thin plate shape upward from the center part in the width direction of the leg part 42, and its distal end part is bent outward in a substantially L shape.
(2) Current-carrying part 45
As shown in FIGS. 5 and 6, the energizing portion 45 is positioned at the tip end portion of the leg portion 42, and abuts the back surface of the attached member 20 at an acute angle when the screw is fastened.

A total of four energizing portions 45 are located at both ends of the leg portion 42 in the width direction. Each energizing portion 45 is sharpened at an acute angle.
(Tapping screw 50)
As shown in FIGS. 1 and 2, the tapping screw 50 is inserted through the insertion hole 80 of the grommet 30 from the shaft part 70 and screwed into the screw hole 43 of the metal plate 40 attached to the lower side of the shaft part 70. is there.

By inserting the shaft portion 70 of the grommet 30 into the mounting hole 21 of the mounted member 20 and screwing the tapping screw 50 into the screw hole 43, the metal plate 40 rotates and moves in the axial direction. The member 20 is sandwiched between the back surface of the flange portion 60 and the leg portion.
(Flange part 60)
As shown in FIGS. 3 and 4, the flange portion 60 is formed in a substantially donut shape centering on an insertion hole 80 to be described later, and its circular outer periphery is set larger than the outer shape of the square mounting hole 21.

In addition, although the flange part 60 was formed in the substantially donut shape, it is not limited to this, You may form the external shape in a polygonal shape.
As shown in FIG. 3 and FIG. 4, the flange part 60 includes the following parts when roughly classified.
In addition, each part of the flange part 60 is not limited to following (1)-(6).
(1) Recess 61
As shown in FIG. 3, the recess 61 is recessed from the outer peripheral surface of the flange portion 60, and the operation portion 44 of the metal plate 40 can be rotated.

(2) Through hole 62
As shown in FIG. 3, the through hole 62 penetrates from the bottom of the recess 61 in the axial direction of the shaft portion 70, and the operation portion 44 of the metal plate 40 can move inside.
(3) Slit 63
As shown in FIGS. 3 and 4, the slit 63 extends from the outer peripheral surface of the flange portion 60 to the through hole 62 and allows the operation portion 44 to pass therethrough. The groove width of the slit 63 is set to be narrower than the lateral width of the operation unit 44.

(4) Contact part 64
As shown in FIG. 3, the abutment portion 64 is positioned on the inner side surface of the recess 61 and regulates the rotation by abutting against the operation portion 44 of the metal plate 40.
(5) Temporary holding claws 65
As shown in FIGS. 3 and 4, the temporary holding claw 65 is located in the concave portion 61 facing the contact portion 64 in the circumferential direction of the flange portion 60 and is flexible in the axial direction.

(6) Temporary mounting claw 66
As shown in FIGS. 3 and 4, the temporary attachment claw 66 is located at least on one side of the slit 63 and is flexible in the axial direction.
(Shaft 70)
As shown in FIG. 4, the shaft portion 70 extends from the lower surface of the flange portion 60 in a substantially cylindrical shape.

In addition, although the axial part 70 was formed in the substantially cylindrical shape, it is not limited to this, You may form in the square tube.
(Insertion hole 80)
As shown in FIGS. 3 and 4, the insertion hole 80 penetrates from the upper surface of the flange portion 60 to the end surface of the tip portion of the shaft portion 70 and is formed in a substantially circular shape.

Although the insertion hole 80 is formed in a substantially circular shape, the present invention is not limited to this and may be formed in a polygonal shape.
(installation method)
Next, a method for attaching the screw grommet 10 having the above-described configuration will be described.

First, the grommet 30 and the metal plate 40 are assembled.
As shown in FIG. 7, the temporary attachment claw 66 of the grommet 30 is pushed up by the operation portion 44 of the metal plate 40.
When the temporary attachment claw 66 is pushed up, as shown in FIG. 7, the slit 63 of the flange portion 60 is expanded, and the operation portion 44 fits into the recess 61.

When the operation portion 44 is fitted in the recess 61, the temporary attachment claw 66 is restored by the elastic restoring force of the resin, the slit 63 is restored, and the operation portion 44 cannot pass through the slit 63, as shown in FIGS. .
Further, when the metal plate 40 is rotated 45 degrees while the temporary attachment claw 66 of the grommet 30 is pushed up by the operation portion 44 of the metal plate 40, the metal plate 40 is attached to the temporary holding claw 65 as shown in FIGS. It fits in the lower side and is elastically held by the temporary holding claw 65.

Next, as shown in FIG. 2, the rectangular base 41 of the metal plate 40 is fitted into the mounting hole 21 having substantially the same shape (see FIGS. 16 and 17).
Next, the tapping screw 50 is screwed into the screw hole 43 of the metal plate 40 through the insertion hole 80 of the grommet 30 as shown in FIGS.
When the tapping screw 50 is screwed in, the operating portion 44 of the metal plate 40 is pressed in the axial direction by the temporary holding claws 65 of the grommet 30, so that a torque is generated to rotate the metal plate 40 in the horizontal direction.

Due to the torque, the operation unit 44 is detached from the temporary holding claws 65, and the metal plate 40 rotates 45 degrees as shown in FIG.
When the metal plate 40 rotates 45 degrees, as shown in FIG. 19, the diagonal length of the square base 41 is utilized, and the four current-carrying portions 45 overlap the back surface of the mounted member 20, Function.

At this time, the operation portion 44 of the metal plate 40 rotates in the recess 61 and contacts the contact portion 64, whereby the rotation is restricted.
Further, when the tapping screw 50 is tightened, the metal plate 40 moves in a direction approaching the grommet 30 in a non-rotating state.
As the metal plate 40 moves, the screw grommet 10 is attached to the mounting hole 21 of the mounted member 20 by sandwiching the mounted member 20 with the back surface of the flange portion 60 as shown in FIG.

Further, as the metal plate 40 moves, the sharp energized portion 45 bites into the back surface of the mounted member 20 as shown in FIGS. At this time, the energized portion 45 having an acute angle breaks or scrapes off a painted surface (not shown) formed on the back surface of the mounted member 20, thereby enabling energization with the mounted member 20. For this reason, the electricity that has flowed through the metal plate 40 is caused to flow through the mounted member 20 to be grounded (grounded), or by connecting a ground wire to the metal plate 40, The metal plate 40 can be grounded (grounded).
(How to remove)
Next, a method for removing the screw grommet 10 will be described.

First, the tapping screw 50 is loosened, and the operation part 44 of the metal plate 40 is held to reverse 45 degrees as shown in FIG.
When the metal plate 40 is reversed, as shown in FIGS. 16 and 17, the four corners of the rectangular base 41 and the four corners of the mounting hole 21 having the substantially same shape of the mounted member 20 are formed. The position matches.
The screw grommet 10 can be removed from the mounted member 20 by extracting the metal plate 40 and the shaft portion 70 of the flange portion 60 from the mounting hole 21 of the mounted member 20 while the metal plate 40 is rotating.

The removed screw grommet 10 can be reused.
Although the metal plate 40 is reversed with respect to the grommet 30, the entire screw grommet 10 can be reversed and removed.
(Second Embodiment in FIG. 21)
Next, a second embodiment of the present invention will be described with reference to FIG.

A feature of the present embodiment is that the attachment member 100 such as a part can be attached to the attached member 20 via the screw grommet 10.
That is, the mounting member 100 is formed with a communication hole 110 that penetrates the front and back surfaces and communicates with the mounting hole 21 of the mounted member 20. The communication hole 110 is formed in substantially the same shape as the base 41 of the metal plate 40.

In the description of the present embodiment, the same components as those in the first embodiment described above with reference to FIGS.
According to the present embodiment, the mounted member 20 and the mounting member 100 can be fastened via the screw grommet 10 in a state where they are overlapped.
As shown in FIG. 21, the mounting member 100 is positioned between the screw grommet 10 and the mounted member 20. However, the present invention is not limited to this, and the mounting member 100 is mounted below the mounted member 20 in FIG. The member 100 may be positioned.

(First embodiment)
10 Screw grommet
20 Mounted member 21 Mounting hole
30 Grommet 40 Metal plate
41 Base 42 Leg
43 Screw hole 44 Operation section
45 Current-carrying part (hanging cost)
50 Tapping screw 60 Flange
61 Recess 62 Through hole
63 Slit 64 Contact part
65 Temporary holding claw 66 Temporary mounting claw
70 Shaft 80 Insertion hole (second embodiment)
100 Mounting members (parts) 110 Communication hole

Claims (8)

A flange portion provided with an insertion hole through which a tapping screw is passed, and a grommet having a shaft portion extending from the flange portion;
A base portion that is pivotally attached to the grommet and has a screw hole coaxially formed with the insertion hole, and a metal plate having a leg portion that extends toward the flange portion and faces the back surface of the flange portion. In screw grommet,
By inserting the shaft portion into a mounting hole of a mounted member such as a panel, and screwing the tapping screw into the screw hole, the metal plate rotates and moves in the axial direction. A screw grommet characterized by being sandwiched between the rear surface of the flange portion and the leg portion. The base of the metal plate is
The mounting hole has substantially the same shape as the mounting hole,
The screw grommet according to claim 1, wherein when the metal plate is rotated, a hooking margin is formed between the metal plate and the back surface of the attached member. On the legs of the metal plate,
An operation part extending from the tip of the screw hole in the circumferential direction is formed,
In the flange part of the grommet,
The screw grommet according to claim 1 or 2, wherein a concave portion that is recessed from the outer peripheral surface and in which the operation portion is rotatable is formed. In the flange part of the grommet,
A through hole penetrating in the axial direction of the shaft portion from the bottom of the recess;
The screw grommet according to claim 3, wherein a slit is formed from the outer peripheral surface of the flange portion to the through hole and through which the operation portion can pass. On the inner surface of the recess,
5. The screw grommet according to claim 3, wherein a contact portion that restricts rotation by contacting the operation portion of the metal plate is provided. In the recess of the grommet,
The screw grommet according to claim 5, wherein a temporary holding claw that is positioned opposite to the corresponding contact portion in the circumferential direction of the flange portion and that is flexible in the axial direction is provided. In the flange part of the grommet,
The screw grommet according to claim 4, wherein a temporary mounting claw is provided at least on one side of the slit and is flexible in the axial direction. On the legs of the metal plate,
The screw grommet according to any one of claims 1 to 7, further comprising an energization portion that makes an acute contact with the back surface of the attached member when the screw is fastened.

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