JP2012010473A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet that can surely prevent dropping out from a hole on a panel when used, without increasing an insertion force when mounted in the hole on the panel.SOLUTION: A grommet 1 comprises: an inner member 2 which is provided with a cylindrical section 20 positioned in a hole 60 on a panel 6 and allowing an electric wire to pass through the inside thereof, a collar section 21 abutting on an edge 61 of the hole 60 and a claw section 22 for sandwiching the edge 61 on the panel 6 between itself and the collar section 21; a regulation member 3 slidably installed at the cylindrical section 20 and regulating a bend of the claw section 22 toward the inside of the cylindrical section 20 by being positioned at the reverse side of the claw section 22 on the inside of the cylindrical section 20; and a seal member 4. The regulation member 3 is positioned at the reverse side of the claw section 22 after the inner member 2 is press-fitted in the hole 60 and the claw section 22 sandwiches the edge 61 of the hole 60 between itself and the collar section 21.

Description

  The present invention relates to a grommet that is attached to a hole in a panel that constitutes a vehicle body of an automobile, and through which an electric wire passes.

  Conventionally, for example, as shown in FIG. 12 to FIG. 14, in order to protect an electric wire passed through a hole in a panel constituting a car body of an automobile and prevent a liquid such as water from entering through the hole. A grommet 201 is used (see, for example, Patent Document 1).

  As shown in FIGS. 12 and 14, the grommet 201 includes an inner member 202 made of a hard synthetic resin and a seal member 204 made of an elastically deformable rubber and attached to the inner member 202. I have.

  As shown in FIGS. 12 and 13, the inner member 202 includes a cylindrical portion 220 that is positioned in the hole 60 of the panel 6 and through which the electric wire 5 is passed, and an axial end portion 220 c of the cylindrical portion 220. A plurality of claw portions 222 that extend outward in the radial direction of the cylindrical portion 220 and engage with the edge portion 61 of the hole 60, and extend radially outward of the cylindrical portion 220 from the other end portion 220 d in the axial direction of the cylindrical portion 220. And a flange portion 221 formed in an annular shape. Moreover, the panel 6 comprises the floor of the passenger compartment of a motor vehicle.

  As shown in FIG. 14, the sealing member 204 is formed in a cylindrical shape and is attached to the outer periphery of the cylindrical portion 220 and the flange portion 221, and the axial direction of the sealing member-side cylindrical portion 240 in the axial direction. An outer lip 241 that extends from one end and is formed in an annular shape and is in close contact with the edge 61 of the hole 60, and extends from an inner peripheral surface of the outer lip 241, is formed in an annular shape, and an edge of the hole 60 An inner lip 242 that is in close contact with 61, a bottom 243 extending radially inward of the seal member side tubular portion 240 from the other axial end of the seal member side tubular portion 240, and a tubular shape from the outer surface of the bottom portion 243 And a circular pipe portion 244 through which the electric wire 5 passes.

  The grommet 201 is press-fitted into the hole 60 of the panel 6 from the one end 220 c side of the cylindrical portion 220, and the plurality of claw portions 222 are attached to the hole 60 by engaging with the edge portion 61 of the hole 60. Further, when the claw portion 222 is passed through the hole 60, the claw portion 222 is once bent in a direction approaching the tube portion 220, and then restored in a direction away from the tube portion 220 and locked to the edge portion 61 of the hole 60. . In addition, the grommet 201 is attached to the hole 60 so that the outer lip 241 and the inner lip 242 are in close contact with the edge 61 of the hole 60 to cover the hole 60, and liquid such as water enters from the hole 60. To prevent.

JP 2004-215334 A

  The conventional grommet 201 described above has the following problems. That is, as shown in FIG. 14, in the grommet 201, one end 220c of the cylindrical portion 220 protrudes above the panel 6, and this one end 220c may be stepped on by the occupant. In that case, there is a problem that the base portion G of the claw portion 222 may be damaged or the cylindrical portion 220 may be bent in the direction of the arrow H, so that the grommet 201 may drop out of the hole 60. In addition to the case where the panel 6 constitutes the floor of the passenger compartment, there is a problem that the grommet 201 may fall out of the hole 60 when a load is applied to the one end portion 220c of the cylindrical portion 220.

  Accordingly, an object of the present invention is to provide a grommet that can surely prevent the panel from falling out of the hole during use without increasing the insertion force when the panel is attached to the hole.

  In order to achieve the above object, the invention described in claim 1 is formed in a cylindrical shape, is positioned in a hole of the panel, and protrudes from an outer peripheral surface of the cylindrical portion, and a cylindrical portion through which an electric wire passes. A flange that contacts the edge of the hole, and is formed so as to extend from the outer peripheral surface of the cylinder and bendable to the inside of the cylinder, and between the flange and the edge of the hole In the grommet provided with an inner member provided with a claw part sandwiching the part, the claw part is slidably attached to the cylinder part, and is positioned on the back side of the claw part inside the cylinder part so that the claw part is A regulating member that regulates bending to the inside of the cylindrical portion, and after the inner member is press-fitted into the hole and the claw portion sandwiches an edge of the hole between the flange portion, The restricting member is positioned on the back side of the claw portion. A grommet which is characterized in Rukoto.

  The invention described in claim 2 is the invention described in claim 1, wherein the regulating member is formed in a cylindrical shape, and slides on the inner peripheral surface of the cylindrical portion along the axial direction of the cylindrical portion. A restricting member side tube portion and a restricting member side claw portion extending from an outer peripheral surface of the restricting member side tube portion are provided, and the restricting member side tube portion is disposed on the inner member. When the restriction member side claw portion is positioned at a separated position away from the back side, and when the restriction member side cylinder portion is positioned on the back side of the claw portion, And a second locking portion for locking the restriction member side claw portion.

  The invention described in claim 3 is the invention described in claim 2, wherein the claw portion is provided on one end portion side of the tube portion, and the inner member is connected to the tube portion from one end portion of the tube portion. And a cover portion that covers one end surface of the regulating member side cylinder portion is provided.

  According to the first aspect of the present invention, the claw portion is slidably attached to the cylindrical portion and is positioned on the back side of the claw portion inside the cylindrical portion, so that the claw portion bends inside the cylindrical portion. A regulating member that regulates this, and after the inner member is press-fitted into the hole and the claw portion sandwiches an edge of the hole between the flange portion and the claw portion, Since it is positioned on the back side, it is possible to provide a grommet that can reliably prevent the panel from falling off during use without increasing the insertion force when the panel is attached to the hole.

  According to the invention described in claim 2, the regulating member side tubular portion that is formed in a cylindrical shape on the regulating member and slides along the axial direction of the tubular portion on the inner peripheral surface of the tubular portion; A restricting member side claw portion extending from the outer peripheral surface of the restricting member side tube portion, and the restricting member side tube portion is positioned on the inner member at a separated position away from the back side of the claw portion. When the restriction member side claw portion is positioned, the restriction member side claw portion is engaged when the restriction member side tube portion is positioned on the back side of the claw portion. And the second locking portion to be stopped, so that the cylinder portion on the regulating member side is separated from the back side of the claw portion until the claw portion sandwiches the edge of the hole between the claw portion and the collar portion. After positioning the edge of the hole between the claw part and the collar part, slide the regulating member side cylinder part from the separated position. It can be positioned on the back side of the claw portion by causing.

  According to the invention described in claim 3, the claw portion is provided on one end portion side of the tube portion, and is extended from the one end portion of the tube portion to the inside of the tube portion on the inner member, Since the cover part which covers the one end surface of the regulating member side cylinder part is provided, when a load is applied to one end part of the cylinder part, it is possible to prevent the load from being directly applied to the regulating member side cylinder part. In addition, it is possible to provide a grommet that can more reliably prevent falling out of the hole during use.

It is a perspective view which shows the state by which the grommet concerning one embodiment of this invention was attached to the hole of the panel. It is explanatory drawing explaining a mode that the grommet shown by FIG. 1 is attached to the hole of a panel, and is a figure which shows the state before a grommet is attached to the hole of a panel. It is explanatory drawing explaining a mode that the grommet shown in FIG. 1 is attached to the hole of a panel, and the grommet shown in FIG. 2 is press-fitted in the hole of a panel, and a hole is formed between a nail | claw part and a collar part. It is a figure which shows the state where the edge part was pinched | interposed. It is explanatory drawing explaining a mode that the grommet shown in FIG. 1 is attached to the hole of a panel, and the grommet control member shown in FIG. 3 is positioned in the back side of a nail | claw part, and a grommet is completely in the hole of a panel It is a figure which shows the state attached to. It is sectional drawing along the BB line in FIG. It is sectional drawing along CC line in FIG. It is sectional drawing along the DD line in FIG. It is sectional drawing along the EE line in FIG. It is a perspective view which shows the inner member and control member of the grommet shown by FIG. 1, and is a figure which shows the state which the control member side nail | claw part has latched to the 1st latching | locking part. FIG. 10 is a perspective view showing an inner member shown in FIG. 9. FIG. 10 is a perspective view showing a regulating member shown in FIG. 9. It is a perspective view which shows the state in which the conventional grommet was attached to the hole of the panel. It is a perspective view which shows the inner member of the grommet shown by FIG. It is sectional drawing along the FF line in FIG.

  A grommet according to an embodiment of the present invention will be described with reference to FIGS. The grommet 1 of the present invention is attached to the hole 60 of the panel 6 constituting the floor of the passenger compartment of the automobile, protects the electric wire 5 passed through the hole 60, and liquid such as water is occupant from the hole 60. It prevents entry into the room.

  As shown in FIG. 2, the hole 60 has a round planar shape. Moreover, in FIGS. 1-8, the upper part of the panel 6 becomes a passenger compartment. Moreover, the said electric wire 5 (it shows with a dashed-two dotted line in FIG. 1) is an electric wire which comprises a wire harness.

  As shown in FIG. 5 and the like, the grommet 1 is composed of an inner member 2 made of a hard synthetic resin and a hard synthetic resin, and is slidably attached to a cylindrical portion 20 described later of the inner member 2. A restriction member 3 and a seal member 4 made of elastically deformable rubber and attached to the restriction member 3 are provided.

  As shown in FIGS. 9 and 10, the inner member 2 is formed in a cylindrical shape, is positioned in the hole 60 of the panel 6, and passes through the electric wire 5 on the inner side. A flange portion 21 that protrudes from the outer peripheral surface 20 a and contacts the edge portion 61 of the hole 60, and a claw portion 22 that extends from the outer peripheral surface 20 a of the cylindrical portion 20 and sandwiches the edge portion 61 of the hole 60 between the flange portion 21. And a first locking portion 24 and a second locking portion 25 to be locked by a later-described restricting member side claw portion 32 of the restricting member 3, and from the one end portion 20c of the tubular portion 20 to the radially inner side of the tubular portion 20 A cover part 27 that is extended and formed in an annular shape, and a positioning rib 26 that is provided on the inner peripheral surface 20 b of the cylinder part 20 and extends in the axial direction of the cylinder part 20 are provided.

  The cylindrical portion 20 is formed in a cylindrical shape whose outer diameter is smaller than the inner diameter of the hole 60. Further, the cylindrical portion 20 has a hole in the panel 6 in a state in which one end 20c in the axial direction protrudes above the panel 6, that is, on the passenger compartment side, and the other end 20d in the axial direction is positioned below the panel 6. 60. Also, a one-dot chain line P in FIG.

  The flange portion 21 is formed in a substantially annular shape over the entire circumference of the outer peripheral surface 20a except for the portion where the claw portion 22 and the second locking portion 25 are provided. Further, the outer diameter of the substantially annular flange 21 is formed larger than the inner diameter of the hole 60. The flange 21 is positioned below the panel 6 and abuts against the edge 61 of the hole 60.

  The claw portion 22 has a cantilever plate-like arm portion 22a having one end portion connected to the outer peripheral surface 20a and the other end portion being a free end, and a radially outer side of the tubular portion 20 from the other end portion of the arm portion 22a. And a projecting portion 22b projecting from the top. The arm portion 22 a is formed by providing a U-shaped slit 23 in the cylindrical portion 20. That is, the arm portion 22 a is configured by a part of the cylindrical portion 20. The one end portion of the arm portion 22a is located at the axial center portion of the cylindrical portion 20, and the other end portion of the arm portion 22a is located at one axial end portion 20c of the cylindrical portion 20. Yes. Such a claw portion 22 is once bent to the inside of the cylindrical portion 20 when being passed through the hole 60 and attached before being bent above the hole 60 when being attached to the hole 60 of the grommet 1. The edge portion 61 of the hole 60 is sandwiched between the flange portion 21 by restoring the state. Further, three claw portions 22 are provided at equal intervals along the circumferential direction of the cylindrical portion 20.

  The first locking portion 24 includes a through hole 24a formed through the portion of the cylindrical portion 20 on the other end 20d side in the axial direction, and a wall 24b positioned on the other end 20d side of the through hole 24a. It is configured. Further, the wall 24 b is a part of the cylindrical portion 20. The second locking portion 25 includes a through hole 25a that is formed through a portion of the cylindrical portion 20 on the one end portion 20c side in the axial direction, and a wall 25b that is positioned on the other end portion 20d side of the through hole 25a. Has been. Further, the through hole 25 a of the second locking part 25, the wall 25 b, the through hole 24 a of the first locking part 24, and the wall 24 b are arranged in order along the axial direction of the cylindrical part 20. The first locking portion 24 and the second locking portion 25 are provided between one claw portion 22 and the other claw portion 22, and are equally spaced from each other along the circumferential direction of the tube portion 20. There are three each.

  As shown in FIGS. 9 and 11, the restriction member 3 is formed in a cylindrical shape, and the restriction member side tubular portion 30 that slides on the inner peripheral surface 20 b of the tubular portion 20 along the axial direction of the tubular portion 20. And a regulating member side claw portion 32 that extends from the outer peripheral surface 30a of the regulating member side cylinder portion 30 and engages with the first locking portion 24 and the second locking portion 25 described above, and the regulating member side cylinder portion 30. A flange portion 31 that extends from the other end portion 30d in the axial direction to the outside in the radial direction of the restricting member side tubular portion 30 and is formed in an annular shape, and an outer peripheral surface 30a of the restricting member side tubular portion 30 are provided. A positioning groove 36 extending in the axial direction of the member-side cylinder portion 30 is provided.

  The regulating member side cylinder part 30 is formed in a cylindrical shape whose outer diameter is smaller than the inner diameter of the cylinder part 20. The restricting member side tubular portion 30 is inserted into the tubular portion 20 from the opening on the other end portion 20 d side of the tubular portion 20, and slides on the inner peripheral surface 20 b of the tubular portion 20. Further, the restricting member side tubular portion 30 is inserted into the tubular portion 20 from the one end portion 30c side in the axial direction. Further, when the regulating member side cylinder portion 30 is inserted into the cylinder portion 20, as shown in FIG. 9, the positioning rib 26 is positioned in the positioning groove 36, so that the cylinder portion 20 and the regulating member side are arranged. Positioning with the cylinder part 30 is made.

  As shown in FIGS. 7 and 8, the restriction member side tubular portion 30 is positioned on the back side of the claw portion 22 inside the tubular portion 20, so that the claw portion 22 bends inside the tubular portion 20. To regulate. That is, when the one end portion 20c of the cylinder portion 20 is stepped on by an occupant, a load is applied to the one end portion 20c, and the claw portion 22 tries to bend inside the cylinder portion 20. By pushing back the claw part 22, the claw part 22 is restrained from bending inside the cylinder part 20. This can reliably prevent the grommet 1 from dropping from the hole 60 when the grommet 1 is used.

  In addition, the regulating member side cylinder portion 30 is positioned on the back side of the claw portion 22 after the inner member 2 is press-fitted into the hole 60 and the claw portion 22 sandwiches the edge portion 61 of the hole 60 between the claw portion 21. It is done. That is, the regulation member side cylinder part 30 is separated from the back side of the claw part 22 until the claw part 22 sandwiches the edge part 61 of the hole 60 between the claw part 21 and the claw part 22 as shown in FIGS. It is positioned at a separated position. By this, when the nail | claw part 22 is passed through the hole 60, it can be bent inside the cylinder part 20, and it can avoid that the insertion force to the hole 60 of the grommet 1 goes up.

  The restriction member side claw portion 32 has a cantilever plate-like arm portion 32a whose one end portion is connected to the outer peripheral surface 30a and the other end portion is a free end, and the other end portion of the arm portion 32a from the other end portion. And a protrusion 32b protruding outward in the radial direction of the portion 30. The arm portion 32 a is formed by providing two slits 33 in the regulating member side cylinder portion 30. That is, the arm part 32 a is configured by a part of the regulating member side cylinder part 30. The one end portion of the arm portion 32 a is located at the axial center of the restricting member side tubular portion 30, and the other end portion of the arm portion 32 a is one end of the restricting member side tubular portion 30 in the axial direction. It is located in the part 30c. Further, the three restricting member side claw portions 32 are provided at equal intervals along the circumferential direction of the restricting member side tubular portion 30.

  As shown in FIGS. 5 and 9, the restriction member side claw portion 32 has a first locking state when the restriction member side cylindrical portion 30 is positioned at a separated position away from the back side of the claw portion 22. Lock to the part 24. Further, as shown in FIGS. 1 and 7, the restricting member side claw portion 32 is engaged with the second engaging portion 25 when the restricting member side tubular portion 30 is positioned on the back side of the claw portion 22. Further, “the restricting member side claw portion 32 is engaged with the first engaging portion 24” means that the protruding portion 32b of the restricting member side claw portion 32 is passed through the through hole 24a and the protruding portion 32b is attached to the wall 24b. Say hanging. Further, “the restricting member side claw portion 32 is engaged with the second engaging portion 25” means that the protruding portion 32b of the restricting member side claw portion 32 is passed through the through hole 25a and the protruding portion 32b is attached to the wall 25b. Say hanging.

  Further, in the grommet 1, the regulating member side claw portion 32 is locked to the first locking portion 24, whereby the regulating member 3 is temporarily held by the inner member 2, and the regulating member side claw portion 32 is the second locking portion. The restriction member 3 is permanently fixed to the inner member 2 by being locked to 25.

  Further, in the grommet 1, the locking force when the restricting member side claw portion 32 is locked to the first locking portion 24 is the same as the locking force when the restricting member side claw portion 32 is locked to the second locking portion 25. In order to make it smaller than the locking force, the allowance for the protrusion 32b to the wall 24b is set smaller than the allowance for the protrusion 32b to the wall 25b. Specifically, as shown in FIG. 7, the thickness of the wall 24b is formed to be smaller than the thickness of the wall 25b, and the wall 24b is arranged on the outer side in the radial direction of the cylindrical portion 20 than the wall 25b. With such a configuration, the temporary holding of the restriction member 3 to the inner member 2 and the main fixing of the restriction member 3 to the inner member 2 can be performed with the same nail.

  Further, in the grommet 1, as shown in FIG. 7, in order to make it difficult to disengage the regulating member side claw portion 32 from the second locking portion 25 when a vehicle downward load is applied to the regulating member 3. The abutting surfaces 32c and 25c of the 32b and the wall 25b that are in contact with each other are inclined. That is, the contact surface 32c is inclined so that the angle formed by the outer surface of the arm portion 32a and the contact surface 32c of the protrusion 32b is an acute angle. Further, the contact surface 25c is inclined so that the angle formed by the inner surface of the wall 25b and the contact surface 25c is an acute angle.

  Further, in the grommet 1, the insertion required for removing the restriction member side claw portion 32 locked to the first locking portion 24 from the first locking portion 24 and locking it to the second locking portion 25. The force is designed to be higher than the insertion force required to pass the claw portion 22 through the hole 60. With such a configuration, it is possible to avoid the inconvenience that the regulating member side cylindrical portion 30 slides from the spaced position to the claw portion 22 side before the claw portion 22 sandwiches the edge portion 61 between the claw portion 22 and the claw portion 21. be able to.

  As described above, in the present invention, since the restricting member side claw portion 32, the first locking portion 24, and the second locking portion 25 are provided, the claw portion 22 is provided between the flange portion 21 and the hole 60. Until the edge portion 61 is sandwiched, the regulating member side tubular portion 30 can be positioned at a separated position away from the back side of the claw portion 22, and the edge portion 61 of the hole 60 between the claw portion 22 and the flange portion 21. After sandwiching, the regulating member side cylinder part 30 can be positioned on the back side of the claw part 22 by sliding from the separation position.

  Further, in the present invention, as shown in FIG. 2, in a state where the restricting member side claw portion 32 is engaged with the first engaging portion 24, that is, in a state where the restricting member 3 is temporarily held by the inner member 2. 6, by pushing the grommet 1 into the hole 60 along the direction of the arrow A, the claw portion 22 passes through the hole 60 and the flange portion 21 comes into contact with the edge portion 61 of the hole 60. 5. As shown in FIG. 6, the edge 61 is sandwiched between the claw portion 22 and the collar portion 21. In this state, by further pushing the grommet 1 along the direction of arrow A, the restricting member side claw portion 32 that is locked to the first locking portion 24 is disengaged from the first locking portion 24, and the limiting member 3. Slides in a direction approaching the panel 6, that is, the regulating member side tubular portion 30 slides from the spaced position to the back side of the claw portion 22, and the regulating member side claw portion 32 engages with the second locking portion 25. 1, 4, 7, and 8, the regulating member 3 is permanently fixed to the inner member 2. As described above, according to the present invention, the grommet 1 can be attached to the hole 60 by the action of applying a force along the arrow A direction, that is, by one action.

  The said cover part 27 covers the one end surface 30e of the control member side cylinder part 30 located in the back side of the nail | claw part 22, as shown in FIG.1, FIG.7, FIG.8. Thus, in the present invention, since the cover portion 27 is provided, when a load is applied to the one end portion 20c by, for example, the one end portion 20c of the tube portion 20 being stepped on by the occupant, the regulating member side tube portion It is possible to prevent a direct load from being applied to 30 and to prevent the grommet 1 from dropping out of the hole 60 when the grommet 1 is used.

  As shown in FIGS. 2, 7, and 8, the sealing member 4 is formed in a cylindrical shape, and is disposed on the outer periphery of the cylindrical portion 20 and the regulating member-side cylindrical portion 30. An outer lip 41 that extends from one axial end portion of the seal member side tubular portion 40 and is formed in an annular shape, is in close contact with the edge 61 of the hole 60, and extends from the inner peripheral surface of the outer lip 41. An inner lip 42 that is formed in an annular shape and is in close contact with the edge 61 of the hole 60, and a bottom 43 that extends radially inward of the seal member side cylinder 40 from the other axial end of the seal member side cylinder 40. And circular tube portions 44 and 45 extending in a circular tube shape from the outer surface of the bottom portion 43 and through which the electric wire 5 passes. Further, the seal member 4 is attached to the flange portion 31 of the restriction member 3.

  In such a sealing member 4, the outer lip 41 and the inner lip 42 are in close contact with the edge 61 of the hole 60 to cover the hole 60 in a state where the grommet 1 is attached to the hole 60. By sticking to the outer peripheral surface of the electric wire 5, liquid such as water is prevented from entering the passenger compartment from the hole 60.

  As described above, according to the present invention, it is possible to provide the grommet 1 that can reliably prevent the panel 6 from dropping out of the hole 60 during use without increasing the insertion force when the panel 6 is attached to the hole 60. it can.

  Moreover, although embodiment mentioned above demonstrated the example in which the grommet 1 was attached to the hole 60 of the panel 6 which comprises the floor | bed of the passenger compartment of a motor vehicle, the grommet 1 of this invention is the other site | parts, for example, an engine, of a motor vehicle. It is also possible to attach to the holes of the panels that make up the room.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Grommet 2 Inner member 3 Restriction member 5 Electric wire 6 Panel 20 Cylinder part 21 Gutter part 22 Claw part 60 Hole 61 Edge part

Claims (3)

A cylindrical portion that is formed in a cylindrical shape and is positioned in the hole of the panel and through which an electric wire is passed, a flange that protrudes from the outer peripheral surface of the cylindrical portion and contacts the edge of the hole, and an outer periphery of the cylindrical portion A grommet provided with an inner member that extends from the surface and is formed so as to be able to bend to the inside of the cylindrical portion, and is provided with a claw portion that sandwiches an edge portion of the hole between the flange portion In
A regulation member that is slidably attached to the cylinder part and is positioned on the back side of the claw part inside the cylinder part to regulate the claw part from bending to the inside of the cylinder part; and
The grommet wherein the regulating member is positioned on the back side of the claw portion after the inner member is press-fitted into the hole and the claw portion sandwiches an edge of the hole between the claw portion and the collar portion. . The regulating member is formed in a cylindrical shape and extends from the outer circumferential surface of the regulating member side cylindrical portion and the regulating member side cylindrical portion that slides on the inner circumferential surface of the cylindrical portion along the axial direction of the cylindrical portion. A restriction member side claw portion is provided,
A first locking portion that locks the restriction member-side claw when the restriction member-side cylinder is positioned in the inner member at a separated position away from the back side of the claw; and the restriction The second locking portion that is locked by the restriction member side claw portion when the member side cylinder portion is positioned on the back side of the claw portion, is provided. Grommet. The claw portion is provided on one end side of the tube portion,
The said inner member is provided with the cover part extended in the inside of the said cylinder part from the one end part of the said cylinder part, and covering the one end surface of the said control member side cylinder part. Grommet.

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