JP2014057449A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet 1 capable of reducing fit-in force and being prevented from easily coming off to extracting force.SOLUTION: A grommet 1 is integrally configured by: a first insertion cylinder portion 10 permitting the insertion of a wire harness 4 inserted in an opening portion 3 of a panel material 2 and holding the wire harness 4; a locking portion 20 for locking to one surface of the panel material 2; a flange portion 30 abutting on the other surface of the panel material 2; and an opening fitting portion 40 fitted with the opening portion 3. The locking portion 20 is integrally configured by an abutting portion 23 extended from the opening fitting portion 40, a bending portion 22 extended from the abutting portion 23 in a fit-in direction F and toward the first insertion cylinder portion 10, and a taper portion 21 formed in a generally tapered shape with a hollow inside tapered off in the fit-in direction F and connected to the first insertion cylinder portion 10. The bending portion 22 is equipped with a thin wall portion 22b having wall thickness on a cross section in a longitudinal direction X thinner than the taper portion 21 and the abutting portion 23.

Description

  The present invention relates to a grommet that fits into an opening in a dash panel of an automobile, for example, and elastically supports a wire harness inserted through the opening.

  For example, when a wire harness is routed between the interior of an automobile and an engine room, the wire harness is inserted and routed through an opening provided in a dash panel that separates the interior of the vehicle from the engine room.

  At this time, a grommet formed of an elastic member such as rubber is fitted into the opening, and the wire harness is inserted into the grommet and elastically supported to prevent damage to the wire harness due to contact with the dash panel. Yes. Further, the grommet also plays a role as a soundproof member and a waterproof member that prevent the engine sound and moisture from entering the vehicle interior from the opening.

  For this reason, the grommet is required to be able to be securely fitted to the opening and to be able to elastically support the wire harness. Therefore, the grommet is formed thick using an elastic member such as rubber. However, there is a problem that the grommet is not easily deformed when fitted into the opening, and the fitting input required for fitting is increased.

Therefore, various techniques for reducing the fitting input when the grommet is fitted have been proposed.
For example, the grommet described in Patent Document 1 forms a thin expansion / contraction portion by providing a thinned portion on the inner peripheral surface side of the annular groove portion that fits into the panel hole, and when the expansion portion is inserted into the panel hole, By extending, it can be inserted with a small insertion force.

  However, in the grommet described in Patent Document 1, for example, when a pulling force in the direction of pulling out the grommet from the panel hole is applied to the wire harness held by the insertion portion, the expansion / contraction portion is deformed into a mountain fold shape and the front flange portion is Since it is easily pulled into the panel hole, the panel hole may fall off with a small pulling force.

JP-A-9-219123

  In view of the above-described problems, an object of the present invention is to provide a grommet that can reduce fitting input and prevent easy dropout with respect to a pulling force.

  The present invention has a substantially cylindrical insertion tube portion that allows and holds a flexible long member inserted through an opening provided in the panel material, and elastically supports the insertion tube portion. A locking portion that fits into the opening and engages with one surface of the panel material; and a flange that abuts against the other surface of the panel material in a fitting direction that fits the locking portion into the opening. And an opening fitting portion that is interposed between the locking portion and the flange portion and is fitted to the opening portion, and is configured to be integrated, and the locking portion, the opening fitting portion, and the flange A grommet having a continuous insertion opening that allows the elongate member to be inserted in a thickness direction of the panel material at the portion, wherein the opening is configured to contact the one surface of the panel material. A contact portion extending from the fitting portion in a direction crossing the thickness direction; A bending portion extending from the contact portion so as to be bent toward the insertion direction and the insertion tube portion, and a cross-sectional shape in the thickness direction extending from the bending portion toward the insertion direction. It is formed in a substantially tapered shape with a tapered inner hollow, and is integrally formed with a tapered portion connected to the insertion tube portion, and the bent portion has a thickness in a cross section in the thickness direction, the tapered portion, and the It has a thin part thinner than the contact part.

The panel material is a thin plate material having a flat surface around which the locking portion can be locked around the opening, and can be, for example, a dash panel in an automobile.
The opening may be an opening having a substantially circular shape, a substantially elliptical shape, or a substantially elongated hole shape.
The long member may be a covered electric wire such as a wire harness or a clutch cable.
The said insertion direction can be made into one direction in the thickness direction of a panel material.

According to the present invention, it is possible to reduce the fitting input and prevent it from easily falling off with respect to the pulling force.
Specifically, by providing the bent portion with a thin portion, the bent portion has a lower bending rigidity than the tapered portion and the contact portion. For this reason, with respect to the load which acts on a latching | locking part, while a bending part turns into the site | part which deform | transforms easily in a latching | locking part, it can improve the ease of the deformation | transformation of the latching part with respect to a load. That is, the grommet can adjust the deformation of the locking portion with respect to the load by the thin portion.

Accordingly, the grommet can reduce the fitting input when the grommet is fitted into the opening, and can improve the blocking force against the pulling force.
More specifically, when a grommet is fitted into the opening, the grommet is caused by a load acting in the direction opposite to the fitting direction due to contact with the panel material and a load acting in the center direction of the opening due to contact with the panel material. , Can be deployed to extend the bent portion. At this time, since the bending rigidity of the bent portion is low with respect to the tapered portion and the contact portion, the grommet can further reduce the load for developing the bent portion.

  On the other hand, when the grommet is fitted in the opening, the grommet is pulled out from the opening of the panel material due to, for example, swinging of the long member or reaction force received by the long member. When the scale member is pulled, a pulling force acts on the locking portion from the long member via the insertion tube portion.

  When such a pulling force acts on the locking portion, the bending portion is low in bending rigidity with respect to the taper portion and the contact portion, so that the bending portion is deformed so as to be crushed in the pulling direction. For this reason, a grommet can increase the load which a latching | locking part contact | abuts a panel material because a taper part presses a contact part in the extraction direction.

  Further, the pulling force transmitted from the insertion tube portion to the taper portion is dispersed by the inclination of the taper portion, and acts on the bent portion not only in the pulling direction but also in the direction away from the opening in the direction intersecting the thickness direction. To do. In other words, the pulling force is converted into a load that presses the bent portion in a direction away from the opening in a direction intersecting the thickness direction.

  In addition, since the insertion tube portion pulls the tapered portion in the pulling direction, the locking portion can be deformed so that the insertion tube portion side of the taper portion is drawn into the insertion opening with the bent portion as a fulcrum.

  At this time, since the tapered portion is drawn into the insertion opening without extending, the locking portion can increase the interval between the insertion tube portion and the bent portion in the direction intersecting the thickness direction. In other words, the locking portion can further increase the load that presses the bent portion in the direction away from the opening due to the tapered portion drawn into the insertion opening. For this reason, the grommet can deform the locking portion so that the size of the locking portion on the flange portion side is further increased.

  Thereby, the grommet can prevent the contact portion from being pulled into the opening. That is, the grommet can be prevented from easily falling out of the opening with respect to the pulling force in the pulling direction by converting the pulling force into a blocking force that prevents the grommet from dropping off from the opening.

  Therefore, the grommet can prevent the fitting input from being easily dropped from the opening by converting the pulling force into the blocking force while reducing the fitting input.

In addition, when the grommet is fitted in the opening, even if a load in the insertion direction or the pulling direction is applied to the long member due to swinging or vibration, the thin wall portion expands and contracts. It is possible to prevent a gap from being generated between the contact portion and the panel material by absorbing the load in the direction or the drawing direction.
Therefore, the grommet fitted into the opening can secure more reliable soundproofing and waterproofing by providing the bent portion with a thin portion.

  As an aspect of the present invention, a notch groove portion recessed in the thickness direction of the bent portion in the cross section in the thickness direction is provided on the inner surface side of the bent portion, and the thin portion is configured by the notched groove portion. it can.

According to the present invention, the grommet can more reliably adjust the deformation of the locking portion with respect to the pulling force and further improve the blocking force against the pulling force.
Specifically, when a pulling force acts on the locking portion, the thin portion may buckle and deform due to the pressing in the pulling direction via the tapered portion, and the pulling force may not be converted into a blocking force. Therefore, by forming the thin portion with the notch groove portion, the tapered portion can be reliably tilted so as to be drawn into the insertion opening with the thin portion as a fulcrum.

For this reason, the grommet is deformed so that the load in the direction away from the opening in the direction intersecting the thickness direction acts more reliably on the bent portion, and prevents buckling deformation of the thin portion. Can do.
Therefore, the grommet can more reliably prevent the grommet from dropping from the opening.

As an aspect of the present invention, at least the outer surface of the tapered portion can be formed in a substantially uneven shape that is continuous in the circumferential direction of the tapered portion.
According to the present invention, it is possible to reduce the frictional resistance between the tapered portion and the panel material that is generated when fitting into the opening.

  Furthermore, because of the uneven shape, thick portions and thin portions are alternately formed in the tapered portion, so that when the fitting input acts on the tapered portion, the thin portion can be deformed so as to be contracted or folded. . For this reason, the grommet can deform | transform the latching | locking part more easily in the shape which can be inserted in an opening part.

In addition, the rigidity of the tapered portion in the fitted state can be ensured by the thick portion in the uneven shape. For this reason, the deformation | transformation of the taper part with respect to drawing-out force can be suppressed.
Therefore, the grommet can further reduce the fitting input when fitting the locking portion into the opening.

  According to the present invention, it is possible to provide a grommet capable of reducing fitting input and preventing easy falling off with respect to a pulling force.

The external appearance perspective view which shows the external appearance of the grommet in a fitting state. The side view which shows the external appearance from the side of the grommet in a fitting state. AA arrow sectional drawing in FIG. Sectional drawing which shows the cross section of the grommet and insertion of a panel material before insertion. BB arrow sectional drawing in FIG. Sectional drawing which shows the state of the grommet in the middle of insertion. Sectional drawing which shows the state of a grommet when extraction force acts. The external appearance perspective view which shows the external appearance of another grommet. CC sectional view taken on the line in FIG.

An embodiment of the present invention will be described below with reference to the drawings.
The grommet 1 in the present embodiment will be described in detail with reference to FIGS.

  1 is an external perspective view of the grommet 1 in the fitted state, FIG. 2 is a side view from the side of the grommet 1 in the fitted state, and FIG. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view of the grommet 1 and the panel material 2 before insertion, and FIG. 5 is a cross-sectional view taken along the line BB in FIG.

Further, in FIGS. 1 to 5, the panel material 2 is shown by cutting out the periphery of the fitted grommet 1. In addition, detailed illustration of the wire harness 4 is omitted.
Further, in FIG. 1 and FIGS. 3 to 5, illustration of the adhesive tape 5 (see FIG. 2) that fixes the wire harness 4 and the first insertion tube portion 10 is omitted.
In addition, the longitudinal direction X in FIGS. 1 to 4 indicates the thickness direction of the panel material 2 and the longitudinal direction of the wire harness 4 in a state substantially parallel to the thickness direction of the panel material.

  As shown in FIGS. 1 to 3, the grommet 1 is fitted into the opening 3 of the panel material 2 and elastically supports the wire harness 4 inserted through the opening 3 in the fitted state. The panel material 2 is a part of a member in which a thin plate is three-dimensionally formed, such as a dash panel of an automobile.

  Specifically, as shown in FIGS. 1 to 3, the grommet 1 includes a first insertion tube portion 10 that holds a predetermined position of a wire harness 4 configured by bundling a plurality of covered electric wires (not shown). The locking portion 20 that contacts one surface of the panel material 2 in the longitudinal direction X, the flange portion 30 that contacts the other surface of the panel material 2 in the longitudinal direction X, and the locking portion 20 and the flange portion 30 An opening fitting portion 40 that is interposed therebetween and fits into the opening portion 3 of the panel material 2 is integrally formed, and is formed in an internal hollow shape with rubber having elasticity.

  Further, the vicinity of one end in the longitudinal direction X of the first insertion tube portion 10 and the wire harness 4 are fixed by an adhesive tape 5 indicated by a two-dot chain line in FIG. And as shown in FIG. 4, it is the insertion which is one direction (the left direction in FIG. 4) in the longitudinal direction X with respect to the opening part 3 of the panel material 2 opened in planar view substantially circular shape (illustration omitted). By inserting the wire harness 4 in the direction F and inserting the grommet 1 in the insertion direction F, the fitting state as shown in FIGS. 1 to 3 is realized.

  As shown in FIGS. 1 to 3, the first insertion cylinder portion 10 of the grommet 1 is formed in a substantially cylindrical shape having an inner diameter that allows the wire harness 4 to be inserted in the longitudinal direction X. Further, the first insertion tube portion 10 is formed with a groove 11 that is opened along the longitudinal direction X in order to facilitate the insertion of the wire harness 4. Note that the first insertion tube portion 10 not only holds and fixes the wire harness 4 but also has a role as a handle at the time of insertion or extraction.

  As shown in FIGS. 1 to 3, the locking portion 20 has a substantially truncated cone shape lying in the longitudinal direction X, and has an inner hollow tapered portion 21 formed in an outer shape having a small diameter on the first insertion tube portion 10 side. The bent portion 22 that is bent toward the radially inner side of the tapered portion 21 and the abutting portion 23 that is in contact with one surface of the panel material 2 in the longitudinal direction X are integrally formed. doing. The large diameter side of the tapered portion 21 is formed in a shape having an outer diameter larger than the opening 3 of the panel material 2.

The outer peripheral surface shape and the inner peripheral surface shape of the tapered portion 21 are formed in a substantially uneven shape that is continuous along the circumferential direction in the radial cross section that intersects the longitudinal direction X.
More specifically, as shown in FIGS. 1 and 5, the outer peripheral surface of the tapered portion 21 is arranged with a predetermined interval along the peripheral direction of the outer peripheral surface, and is provided with an outer peripheral recess which is recessed radially inward. A groove portion 24 is formed.

In addition, as shown in FIG. 5, an inner circumferential groove portion 25 is formed on the inner circumferential surface of the tapered portion 21. ing.
By the outer circumferential groove portion 24 and the inner circumferential groove portion 25, the outer circumferential surface shape and the inner circumferential surface shape of the tapered portion 21 are formed in an uneven shape.

  Further, as shown in FIGS. 3 and 4, the bent portion 22 is formed with a notch groove portion 22 a recessed in a substantially V shape outward in the radial direction along the circumferential direction of the inner peripheral surface. . By the notch groove portion 22 a, a thin portion 22 b that is relatively thin with respect to the thickness of the tapered portion 21 and the contact portion 23 is formed in the bent portion 22.

  As shown in FIGS. 3 to 5, the flange portion 30 has an outer diameter larger than the opening portion 3 of the panel material 2 and a flange main body portion 31 formed in a substantially annular shape having a predetermined thickness in the longitudinal direction X. The outer peripheral protrusion 32 formed so as to protrude toward the panel member 2 is integrally formed on the outer peripheral edge of the flange main body 31.

  As shown in FIGS. 3 and 4, the opening fitting portion 40 has an outer diameter that can be elastically deformed and fitted in the radial direction with respect to the opening portion 3 of the panel member 2 and is engaged in the fitted state. The stop portion 20 and the flange portion 30 are formed in a substantially annular shape having a thickness capable of sandwiching the panel material 2.

  The first insertion tube portion 10, the locking portion 20, the opening fitting portion 40, and the flange portion 30 are integrally formed in this order, and the locking portion 20 and the opening fitting that are continuous in the longitudinal direction X are formed. An insertion opening S through which the wire harness 4 is inserted is formed by the internal space of the joint portion 40 and the flange portion 30.

  Further, the grommet 1 includes a second insertion cylinder portion 50 formed in a substantially cylindrical shape having an inner diameter allowing the wire harness 4 to be inserted in the longitudinal direction X from the vicinity of the connection between the first insertion cylinder portion 10 and the taper portion 21. The insertion opening S is formed so as to penetrate therethrough. In addition, an inner surface protrusion 51 that protrudes inward in the radial direction is formed on the inner peripheral surface of the second insertion tube portion 50 in the vicinity of the end portion in the direction opposite to the first insertion tube portion 10. In addition, the 2nd insertion cylinder part 50 also has a role as a handle at the time of insertion or extraction.

A state when the grommet 1 having the above configuration is fitted into the opening 3 of the panel member 2 will be described in detail with reference to FIGS. 4 and 6.
In addition, FIG. 6 has shown sectional drawing of the state of the grommet 1 in the middle of insertion.
Moreover, in FIG. 6, illustration of the adhesive tape 5 which fixes the wire harness 4 and the 1st insertion cylinder part 10 is abbreviate | omitted.

  When the operator holds the first insertion cylinder part 10 or the second insertion cylinder part 50 and inserts the grommet 1 in the insertion direction F, as shown in FIG. The edge part of the opening part 3 in the material 2 and the taper part 21 of the latching | locking part 20 contact | abut in the insertion direction F. FIG. And if the grommet 1 contact | abutted to the panel material 2 is inserted further in the insertion direction F, the latching | locking part 20 will start a deformation | transformation so that it may reduce in diameter to radial direction.

  More specifically, when the grommet 1 in contact with the panel material 2 is further inserted in the insertion direction F, the taper portion 21 is pressed in the direction opposite to the insertion direction F, and the panel material 2 is pressed inward in the radial direction. As a result, the fitting input required for fitting the grommet 1 into the opening 3 increases.

At this time, since the thickness of the thin portion 22b is smaller than the thickness of the taper portion 21 and the contact portion 23, the bent portion 22 extends and expands in the longitudinal direction X as shown in FIG. It deforms as follows. At the same time, the thin portion sandwiched between the outer circumferential groove portion 24 and the inner circumferential groove portion 25 in the tapered portion 21 contracts in the circumferential direction by being pressed radially inward.
In this way, the locking portion 20 is deformed so as to be reduced in diameter so that it can be fitted into the opening 3.

  When the grommet 1 is subsequently inserted in the insertion direction F, deformation proceeds so that the locking portion 20 is further reduced in diameter in the radial direction by the elasticity of the bent portion 22 and the tapered portion 21. And when the opening fitting part 40 fits into the opening part 3, as shown in FIG. 3, as for the grommet 1, the latching | locking part 20 will return to the shape before insertion by the repulsive force by elasticity, and will be in a fitting state. The harness 4 is elastically supported.

  At this time, one surface of the panel material 2 and the abutting portion 23 abut on each other in the longitudinal direction X, and the other surface of the panel material 2 and the outer peripheral projection 32 of the flange portion 30 abut on each other in the longitudinal direction X. The material 2 is sandwiched.

Next, the state of the grommet 1 when a pulling force in the pulling direction from the panel material 2 is applied to the grommet 1 in the fitted state fitted to the panel material 2 will be described in detail with reference to FIG. .
FIG. 7 shows a cross-sectional view of the grommet 1 when a pulling force is applied.
Moreover, in FIG. 7, illustration of the adhesive tape 5 which fixes the wire harness 4 and the 1st insertion cylinder part 10, and the inner peripheral groove part 25 of the taper part 21 is abbreviate | omitted.

In the fitting state shown in FIG. 3 in which the grommet 1 is fitted in the opening 3 of the panel material 2,
When the wire harness 4 is pulled in the pulling direction P in which the grommet 1 is pulled out from the opening 3 by the vibration or reaction force received by the wire harness 4 or when the wire harness 4 is routed, A pulling force acts on the locking portion 20.

When a pulling force in the pulling direction P is applied, the locking portion 20 of the grommet 1 starts to deform as shown in FIG.
More specifically, when a pulling force in the pulling direction P acts on the first insertion tube portion 10, the bent portion 22 is deformed in the pulling direction P, so that the tapered portion 21 and the contact portion 23 contact each other in the pulling direction P. Touch.

  At this time, since the first insertion tube portion 10 pulls the tapered portion 21 in the drawing direction P, the tapered portion 21 is drawn into the insertion opening S with the bent portion 22 as a fulcrum by the thin portion 22b and the notch groove portion 22a. Fall over.

  Further, the pulling force transmitted from the first insertion tube portion 10 to the tapered portion 21 is transmitted from the small diameter side to the large diameter side of the tapered portion 21 along the inclination of the tapered portion 21. For this reason, a load in the radially outer direction dispersed from the pulling force acts on the bent portion 22. That is, the grommet 1 is deformed so as to expand the large diameter side of the locking portion 20 by the pulling force.

  Then, as the pulling force acting on the first insertion tube portion 10 becomes larger, the taper portion 21 falls so as to be further drawn into the insertion opening S, and the taper portion 21 approaches approximately parallel to the panel material 2. Further, the load in the radially outer direction acts on the bent portion 22 more strongly, and the grommet 1 is deformed so as to further expand the large diameter side of the locking portion 20.

The grommet 1 that realizes the operation as described above can reduce the fitting input and prevent it from easily falling off with respect to the pulling force.
Specifically, by providing the bent portion 22 with the thin portion 22 b, the bent portion 22 has a lower bending rigidity than the tapered portion 21 and the contact portion 23. For this reason, with respect to the load which acts on the latching | locking part 20, while the bending part 22 becomes a part which is easy to deform | transform in the latching | locking part 20, it improves the ease of the deformation | transformation of the latching part 20 with respect to a load. Can do. That is, the grommet 1 can adjust the deformation of the locking portion 20 with respect to the load by the thin portion 22b.

Accordingly, the grommet 1 can reduce the fitting input when the grommet 1 is fitted into the opening 3 and can improve the blocking force against the pulling force.
More specifically, when the grommet 1 is fitted into the opening 3, the load acts in the direction opposite to the fitting direction F due to contact with the panel material 2, and acts toward the radial center due to contact with the panel material 2. By the load, the grommet 1 can be deployed so as to extend the bent portion 22. At this time, since the bending rigidity of the bent portion 22 is low with respect to the tapered portion 21 and the contact portion 23, the load for developing the bent portion 22 can be further reduced.

  On the other hand, when the wire harness 4 is pulled in the pulling direction P in the fitted state in which the grommet 1 is fitted in the opening 3, the pulling force is applied from the wire harness 4 to the locking portion 20 via the first insertion tube portion 10. Works.

  When such a pulling force acts on the locking part 20, the bending part 22 is low in bending rigidity with respect to the taper part 21 and the contact part 23, so that the bending part 22 is deformed so as to be crushed in the pulling direction P. To do. For this reason, the grommet 1 can increase the load with which the locking portion 20 comes into contact with the panel material 2 when the tapered portion 21 presses the contact portion 23 in the pulling direction P.

  Further, the pulling force transmitted from the first insertion tube portion 10 to the tapered portion 21 is dispersed by the inclination of the tapered portion 21 and acts on the bent portion 22 not only in the pulling direction P but also radially outward. In other words, the pulling force is converted into a load that presses the bent portion 22 toward the radially outer side.

  In addition, since the first insertion tube portion 10 pulls the tapered portion 21 in the drawing direction P, the locking portion 20 is deformed so that the small diameter side of the tapered portion 21 is drawn into the insertion opening S with the bent portion 22 as a fulcrum. be able to.

  At this time, since the tapered portion 21 is drawn into the insertion opening S without extending, the locking portion 20 can increase the interval between the first insertion cylindrical portion 10 and the bent portion 22 in the radial direction. That is, the locking portion 20 can increase the load that presses the bent portion 22 outward in the radial direction by the tapered portion 21 drawn into the insertion opening S. For this reason, the grommet 1 can deform | transform the latching | locking part 20 so that the diameter of the flange part 30 side in the latching | locking part 20 may be expanded further.

  Thereby, the grommet 1 can prevent the contact portion 23 from being pulled into the opening 3. That is, the grommet 1 is prevented from easily falling off from the opening 3 with respect to the pulling force in the pulling direction P by converting the pulling force into a blocking force that prevents the grommet 1 from dropping from the opening 3. it can.

  Therefore, the grommet 1 can prevent falling off from the opening 3 easily by reducing the fitting input and converting the pulling force into the blocking force.

Further, in the fitted state in which the grommet 1 is fitted in the opening 3, even if a load in the fitting direction F or the drawing direction P is applied to the wire harness 4 due to swinging or vibration, the thin portion 22b expands and contracts. Thus, it is possible to prevent a gap from being generated between the contact portion 23 and the panel member 2 by absorbing the load in the insertion direction F or the drawing direction P.
Therefore, the grommet 1 fitted into the opening 3 can ensure more reliable soundproofing and waterproofing by providing the bent portion 22 with the thin portion 22b.

  Moreover, the grommet 1 can adjust the deformation | transformation of the latching | locking part 20 with respect to extraction force more reliably by comprising the thin part 22b by the notch groove part 22a, and can further improve the blocking force with respect to extraction force.

  Specifically, when a pulling force is applied to the locking portion 20, the thin portion 22b may be buckled and deformed by the pressing in the pulling direction P via the taper portion 21, and the pulling force may not be converted into a blocking force. is there. Therefore, by forming the thin portion 22b with the notch groove portion 22a, the tapered portion 21 can be reliably tilted so as to be drawn into the insertion opening S with the thin portion 22b as a fulcrum.

For this reason, the grommet 1 can be deformed so that a load directed radially outwardly acts on the bent portion 22 reliably, and can prevent buckling deformation of the thin portion 22b.
Therefore, the grommet 1 can more reliably prevent the grommet 1 from dropping from the opening 3.

  Further, by forming the outer peripheral surface and inner peripheral surface of the tapered portion 21 into a substantially uneven shape that is continuous in the circumferential direction, the taper portion 21 and the panel material 2 that are generated when the tapered portion 21 is fitted into the opening 3 are formed. Frictional resistance can be reduced.

  Further, since the thick portion and the thin portion are alternately formed in the tapered portion 21 due to the concavo-convex shape, when the fitting input acts on the tapered portion 21, the thin portion is deformed so as to be contracted or folded. Can do. For this reason, the grommet 1 can deform | transform the latching | locking part 20 more easily in the shape which can be inserted in the opening part 3. FIG.

In addition, the rigidity of the tapered portion 21 can be ensured by the thick portion in the uneven shape. For this reason, the deformation | transformation of the taper part 21 with respect to extraction force can be suppressed.
Therefore, the grommet 1 can further reduce the fitting input when the locking portion 20 is fitted to the opening 3.

  In the above-described embodiment, the dash panel of the automobile is used as an example of the panel material 2. However, the present invention is not limited thereto, and may be a thin plate material having a flat surface around which the locking portion 20 can be locked around the opening 3. Any suitable configuration may be used.

  Moreover, although demonstrated using the wire harness 4, it is not limited to this, A pull cable like a clutch cable used with a motor vehicle, a push pull cable like a shift cable, etc. may be sufficient.

  Moreover, although the wire harness 4 and the grommet 1 were fixed with the adhesive tape 5, it is not limited to this, You may fix the wire harness 4 and the grommet 1 with an adhesive agent. Furthermore, you may fix the wire harness 4 and the grommet 1 fixed with the adhesive material with the adhesive tape 5. FIG.

Moreover, although the opening part 3 was made into the substantially circular shape in planar view, it is not limited to this, It is good also as opening parts 3, such as a substantially ellipse shape or a substantially ellipse shape. At this time, the grommet 1 is formed in a shape that can be fitted into the opening 3.
Moreover, although the 1st insertion cylinder part 10 was used as the insertion cylinder part, it is not limited to this, It is good also considering the 1st insertion cylinder part 10 and the 2nd insertion cylinder part 50 as an insertion cylinder part. Alternatively, the second insertion cylinder part 50 may be used as an insertion cylinder part, and the second insertion cylinder part 50 and the wire harness 4 may be fixed with an adhesive tape 5 or the like.

In correspondence between the configuration of the present invention and the above-described embodiment,
The long member of this invention corresponds to the wire harness 4 of the embodiment,
Similarly,
The insertion tube portion corresponds to the first insertion tube portion 10,
The thickness direction corresponds to the longitudinal direction X,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, when the opening has a substantially rounded rectangular shape (not shown), as shown in FIG. 8 showing an external perspective view of another grommet 100 and FIG. 9 showing a sectional view taken along the line CC in FIG. The grommet 100 may be formed in a shape having a locking part 120, an opening fitting part 140, and a flange part 130 that are substantially rounded and rectangular in the longitudinal direction.

  Specifically, as shown in FIGS. 8 and 9, the grommet 100 corresponding to the substantially rounded rectangular opening has a first insertion tube portion 110 that holds a predetermined position of a wire harness (not shown). , A locking portion 120 that contacts one surface of the panel material (not shown) in the longitudinal direction X, a flange portion 130 that contacts the other surface of the panel material in the longitudinal direction X, and the locking portion 120 and the flange portion 130. An opening fitting part 140 that is interposed between the two and fitted into the opening part is integrally formed.

Further, the second insertion cylinder part 150 formed in a substantially cylindrical shape having an inner diameter allowing the wire harness to be inserted in the longitudinal direction X is inserted into the grommet 100 from the vicinity of the connection between the first insertion cylinder part 110 and the taper part 121. The openings S are formed so as to penetrate the openings S.
In the same manner as in the above-described embodiment, a thin-walled portion 122b is formed in the bent portion 122 by a notch groove portion 122a formed on the inner surface of the bent portion 122.

  In addition, as in the above-described embodiment, the tapered portion 121 is formed with the outer circumferential groove portion 124 and the inner circumferential groove portion 125 in the curved surface range in the longitudinal direction, and the outer circumferential surface and the inner circumferential surface are formed in an uneven shape. doing.

  The grommet 100 having such a configuration has the same effects as those of the above-described embodiment due to the concave and convex shapes of the notch groove portion 122a, the thin portion 122b, and the tapered portion 121, even if the opening portion has a substantially rounded rectangular shape. be able to.

DESCRIPTION OF SYMBOLS 1,100 ... Grommet 2 ... Panel material 3 ... Opening part 4 ... Wire harness 10, 110 ... 1st insertion cylinder part 20, 120 ... Locking part 21, 121 ... Taper part 22, 122 ... Bending part 22a, 122a ... Cutting Notch groove portions 22b, 122b ... thin wall portions 23, 123 ... contact portions 30, 130 ... flange portions 40, 140 ... opening fitting portion F ... insertion direction S ... insertion opening X ... longitudinal direction

Claims (3)

A substantially cylindrical insertion tube portion that allows and holds a flexible long member inserted through an opening provided in the panel material; and
A locking portion that elastically supports the insertion tube portion and that is fitted into the opening and locked to one surface of the panel material;
A flange portion that comes into contact with the other surface of the panel material in a fitting direction in which the locking portion is fitted into the opening,
While interposing between the locking portion and the flange portion, and integrally configuring an opening fitting portion that fits into the opening portion,
A grommet having a continuous insertion opening that allows the elongated member to be inserted in the thickness direction of the panel material in the locking portion, the opening fitting portion, and the flange portion,
The locking portion,
An abutting portion extending in a direction intersecting the thickness direction from the opening fitting portion so as to abut on one surface of the panel material;
A bending portion extending from the contact portion so as to be bent toward the insertion direction and the insertion tube portion;
Extending from the bent portion, the cross-sectional shape in the thickness direction is formed into a substantially tapered shape of an internal hollow tapering toward the insertion direction, and integrally configured with a tapered portion connected to the insertion tube portion,
In the bent part,
A grommet provided with a thin portion whose thickness in a cross section in the thickness direction is thinner than the tapered portion and the contact portion. On the inner surface side of the bent portion,
A notch groove provided in the thickness direction of the bent portion in the cross section in the thickness direction,
The grommet according to claim 1, wherein the thin-walled portion is constituted by the notch groove portion. At least the outer surface of the tapered portion,
The grommet according to claim 1, wherein the grommet is formed in a substantially uneven shape that is continuous in a circumferential direction of the tapered portion.

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