JP2012235576A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for reducing a burden of work for installing a grommet in a through hole of a vehicle body panel and the like.SOLUTION: The grommet 1 includes: a body member 2; and an insertion member 3 inserted into a gap of the body member 2. When the tip of the insertion member 3 abuts on a flange section 21 and a second locking face 344 is in a locked state where it is caught in an engaged face 83 of the gap V, an elastic section 23 extends along a wire insertion section 21 and a maximum diameter section 81 is elastically deformed in a small diameter shape in the body member 2. When catching of the second locking face 344 and the engaged face 83 is released and the tip of the insertion member 3 becomes an unlocked state where it does not abut on the flange section 22 from the locked state, the body member 3 is elastically restored. The grommet 1 is inserted into the through hole H as the locked state, and then it is set to be the unlocked state. Thus, the grommet 1 can be installed in the through hole.

Description

  The present invention relates to a grommet that is attached to an electric wire that passes through a through hole formed in a body panel of an automobile or the like.

  For example, when an electric wire (for example, a wire harness (W / H) in which one or more electric wires are bundled) is inserted into a through hole formed in a vehicle body panel, the wire is passed through the inside of a grommet formed of rubber or the like. Insert the harness through the body panel. For example, as shown in FIG. 9, the grommet includes a vehicle body mounting portion 91 having an enlarged diameter and a cylindrical electric wire insertion portion 92 that is continuous with the reduced diameter end thereof. After the wire harness 9 is inserted inside the electric wire insertion portion 92, the wire harness 9 is inserted into the through hole H formed in the vehicle body panel P or the like from the reduced diameter end side of the vehicle body mounting portion 91, and the peripheral edge of the through hole H is expanded to the end. When the wire harness 9 is fitted in a groove 911 formed on the outer side, the wire harness 9 is inserted into the through hole H formed in the vehicle body panel P through the inside of the grommet 90. According to this configuration, the gap between the wire harness 9 and the through hole H is filled with the grommet 90, so that the wire harness 9 is protected in the through portion, and water is infiltrated through the through hole H. Sound leakage is suppressed.

  By the way, in said aspect, when a grommet is pushed in into the through-hole of a vehicle body panel, big resistance force generate | occur | produces. For this reason, the operation | work which mounts a grommet to a vehicle body panel has imposed the big work burden on the operator.

  In this regard, for example, in the configuration disclosed in Patent Document 1, the grommet can be easily inserted into the through hole by forming the maximum outer diameter of the grommet to be substantially the same as the inner diameter of the through hole of the vehicle body panel. Here, after inserting the grommet into the through-hole, the "pressing part" formed in a size larger than the internal dimension of the "expanded part" is pushed into the enlarged part, and the enlarged part is pushed from the inside. The grommet is fixed to the body panel.

JP 2005-33884 A

  According to the configuration disclosed in Patent Document 1, it is necessary to push the pressing portion into the inside of the enlarged diameter portion to elastically deform the enlarged diameter portion to increase the diameter, but the enlarged diameter portion is enlarged by elastic deformation. It takes a big load to do. In particular, the enlarged diameter part and the pressing part are integrally formed members, both of which are formed of rubber or the like, so that when the pressing part is pushed inside the enlarged diameter part, a large frictional force is generated between the parts. Is generated, and the load for pushing the pressing portion becomes very large. That is, according to the configuration disclosed in Patent Document 1, although the operation itself of inserting the grommet into the through hole of the vehicle body panel can be easily performed, the pressing portion to be performed thereafter is pushed into the inside of the enlarged diameter portion to increase the enlarged diameter portion. In the work of increasing the diameter, the worker is still burdened with a large burden.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of reducing the burden of work for mounting a grommet in a through hole such as a vehicle body panel.

  The invention which concerns on a 1st aspect is a grommet, Comprising: A cylindrical electric wire insertion part which penetrates an electric wire, and the said electric wire insertion part is attached to the end, and a clearance gap is formed between the said electric wire insertion part periphery However, an outer cover portion extending along the electric wire insertion portion, and a main body member provided with an inner insertion member inserted into the gap, the outer cover portion protrudes from the outer periphery of the electric wire insertion portion. One end is attached to the formed flange portion, and the flange portion extends along the wire insertion portion while expanding from the attachment end, and further extends while reducing the diameter through the maximum diameter portion. A telescopic portion that is continuous with the other end, and a protruding portion that is continuous with the other end and protrudes from the outer periphery of the other end, the tip of the insertion member abuts on the flange portion, and the insertion member The formed locking part is caught on the wall surface of the gap. In the closed state, the main body member is elastically deformed into a shape in which the expansion / contraction portion extends along the wire insertion portion and the maximum diameter portion is reduced in diameter, and from the locked state, the engagement portion and the engagement When the lock with the surface is released, the main body member is elastically restored.

  The invention which concerns on a 2nd aspect is a grommet which concerns on a 1st aspect, Comprising: The said insertion member from the outer periphery of the cylindrical inner cylinder part which penetrates the said electric wire insertion part inside, and the said inner cylinder part A projecting top plate portion, and one end attached to each position spaced from the outer edge of the top plate portion, extending along the cylindrical direction of the inner cylinder portion, and a leg portion continuous to the free end; The leg portion is formed so as to be swingable in a direction to be separated from and in contact with the inner cylinder portion, the locking portion is formed in the middle of the extension of the leg portion, and the leg portion is formed on the inner cylinder portion. By being swung in the approaching direction, the catch between the locking portion and the wall surface is released.

  The invention according to a third aspect is the grommet according to the first or second aspect, wherein the main body member is formed of rubber or elastomer, and the insertion member is formed of resin.

  According to the first aspect of the invention, the grommet can be easily inserted into the through-hole formed in the vehicle body panel or the like by elastically deforming the main body member in a state where the maximum diameter portion is reduced in diameter while the grommet is in the locked state. Can be inserted. On the other hand, when the grommet inserted into the through hole is changed from the locked state to the unlocked state and the main body member is elastically restored, the reduced diameter end portion sandwiched between the maximum diameter portion and the protruding portion becomes a constricted state. Thus, the grommet is inserted into the through hole in a state in which the grommet is prevented from being removed from the through hole. According to this configuration, the operator can change the hooked state between the locking portion formed on the insertion member and the wall surface of the gap between the main body members and change the grommet from the locked state to the unlocked state, It can be easily installed in the through hole.

  According to the second aspect of the present invention, the catch of the engaging portion and the engaging surface can be released by swinging the leg portion in the direction approaching the inner cylinder portion. Therefore, the grommet can be easily changed from the locked state to the unlocked state.

  According to the third aspect of the invention, the main body member is formed of rubber or elastomer, while the insertion member is formed of resin, so that the insertion member can be inserted into the gap between the main body members with a small load. .

It is sectional drawing of the grommet with which the through-hole of the vehicle body panel was mounted | worn. It is sectional drawing of a main-body member. It is a perspective view of an insertion member. It is a side view of an insertion member. It is a top view of an insertion member. It is sectional drawing of the grommet of a non-locking state. It is sectional drawing of the grommet of a locked state. It is a figure for demonstrating the method to mount a grommet in the through-hole of a vehicle body panel. It is a figure which shows the structural example of the conventional grommet.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention. The wire harness which concerns on embodiment of this invention is mounted in vehicles, such as a motor vehicle, for example, and connects between electric power supply sources, such as a battery or an inverter circuit, and an electrical equipment, or between several electrical equipment.

<1. Grommet>
The configuration of the grommet 1 according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a cross-sectional view of the grommet 1 mounted in the through hole H of the vehicle body panel P.

  As shown in the drawing, the grommet 1 is mounted in a through hole H formed in the vehicle body panel P in a state where a wire harness (W / H) 10 in which one or more electric wires are bundled is inserted inside. As a result, the gap between the wire harness 10 and the through hole H is filled with the grommet 1, and the wire harness 10 is protected in the through portion, and water intrusion through the through hole H, entry of dust, sound leakage, etc. It is suppressed. Although illustration is omitted, the wire harness 10 is fixed to the grommet 1 by tape winding or the like in the vicinity of the outlet of the grommet 1.

  The grommet 1 includes a main body member 2 and an insertion member 3 inserted into the main body member 2. The body member 2 is formed using an elastic material such as rubber or elastomer (for example, thermosetting elastomer). On the other hand, the insertion member 3 is formed using a resin material or the like (for example, polyamide (PA), polypropylene (PP), polybutylene terephthalate (PBT), or ABS resin).

<1-1. Body member 2>
The configuration of the main body member 2 will be described with reference to FIG. 2 in addition to FIG. FIG. 2 shows a cross-sectional view of the main body member 2.

  The main body member 2 is attached to the tubular wire insertion portion 21 through which the wire harness (W / H) 10 is inserted, and the wire insertion portion 21 at one end, and a gap V between the wire insertion portion 21 and the periphery thereof. And an outer cover portion 20 formed so as to extend along the electric wire insertion portion 21. In the following, along the extending direction of the wire insertion part 21, the installation end side of the outer cover part 20 is referred to as the front side of the main body member 2, and the free end side of the outer cover part 20 is the rear side of the main body member 2. The side.

  More specifically, the outer cover portion 20 has a flange portion 22 formed so as to protrude from the outer periphery of the wire insertion portion 21, and one end is attached to the flange portion 22, and the diameter is increased from the installation end. However, it extends along the wire insertion part 21, and further includes the expansion / contraction part 23 extending through the maximum diameter part 81 and further extending while continuing to the other end (reduction diameter end part 82).

  The outer cover portion 20 further includes a cylindrical portion 24 that is continuous with the reduced diameter end portion 82 and extends along the wire insertion portion 21 without changing in diameter. A protruding portion 241 that protrudes from the outer periphery of the cylindrical portion 24 is formed at the rear end portion of the cylindrical portion 24. An edge portion of the front surface (surface facing forward) of the protruding portion 241 has a shape rising along the normal direction of the front surface. That is, a lip 242 is formed on the front surface of the protruding portion 241 along the outer peripheral edge thereof. Further, a rib 243 is formed along the circumferential direction of the outer surface of the cylinder at a position on the outer surface of the cylinder 24 and in front of the protruding portion 241.

  A planar view shape of the outer cover portion 20 (a planar view shape seen from the direction along the extending direction of the wire insertion portion 21) is similar to the shape of the through hole H. In this embodiment, the through hole H has an elliptical shape, and in this case, the outer cover portion 20 (specifically, the flange portion 22, the stretchable portion 23, and the cylindrical portion 24) has an elliptical shape in plan view. . The planar view sizes of the flange portion 22, the reduced diameter end portion 82, and the cylindrical portion 24 are substantially the same as the through hole H. Therefore, the plan view size of the maximum diameter portion 81 and the protruding portion 241 is larger than the through hole H.

  In addition, in the wall surface of the gap V (specifically, the wall surface constituted by the outer side surface of the electric wire insertion portion 21 and the inner side surface of the outer cover portion 20), the portion connected from the reduced diameter end portion 82 to the cylindrical portion 24 is An annular surface portion facing the flange portion 22 is formed. This surface portion is a surface portion that functions as a surface on which a second locking surface 344 described later is hooked, and is hereinafter referred to as an “engagement surface 83”.

<1-2. Insertion member 3>
The configuration of the insertion member 3 will be described with reference to FIGS. 3 to 5 in addition to FIG. FIG. 3 is a perspective view of the insertion member 3. FIG. 4 is a side view of the insertion member 3. FIG. 5 is a plan view of the insertion member 3.

  The insertion member 3 includes a cylindrical inner cylinder portion 31 through which the electric wire insertion portion 21 is inserted, a top plate portion 32 formed so as to protrude from the outer periphery of the end portion of the inner cylinder portion 31, and a top plate. One end is attached to the outer peripheral edge of the part 32, and an outer cylinder part 33 extending along the inner cylinder part 31 is provided. That is, the insertion member 3 has a shape in which the inner cylinder part 31 and the outer cylinder part 33 connected via the top plate part 32 are arranged concentrically with each other. The extension length of the outer cylinder part 33 is formed shorter than the extension length of the inner cylinder part 31. In the following, along the extending direction of the inner cylinder portion 31, the end portion side where the top plate portion 32 is formed is referred to as the front side of the insertion member 3, and the opposite side is referred to as the insertion member 3. It is called the back side.

  The insertion member 3 is inserted into the gap V of the main body member 2 from the front side in a state where the electric wire insertion portion 21 of the main body member 2 is inserted into the inner cylindrical portion 31. Therefore, the inner diameter of the inner cylinder portion 31 is formed to be slightly larger than the outer diameter of the wire insertion portion 21. Moreover, the planar view shape (planar view shape seen from the direction along the extending direction of the inner cylinder part 31) of the outer cylinder part 33 is similar to the outer cover part 20 (here, elliptical shape), and its size. Is substantially the same as the inner diameter size of the cylindrical portion 24.

  A plurality of cutout portions are formed in the outer cylinder portion 33 at intervals in the circumferential direction. Here, four notches arranged at equal intervals in the circumferential direction are formed. A leg portion 34 is formed inside the cutout of each cutout portion.

  One end of the leg portion 34 is attached to the outer peripheral edge of the top plate portion 32, and extends freely along the cylinder direction of the inner cylinder portion 31 at a position that protrudes slightly outward from the outer peripheral surface of the outer cylinder portion 33. It is a long member connected to the end. The leg portion 34 is configured to be swingable in a direction orthogonal to the extending direction (that is, a direction in contact with and away from the inner cylinder portion 31). Further, the leg portion 34 is formed so that its extending length is longer than the extending length of the outer tube portion 33 and shorter than the extending length of the inner tube portion 31.

  On the outer surface of the leg portion 34 (the surface opposite to the surface facing the inner tube portion 31), an inclined surface 341 that is gradually inclined toward the direction away from the inner tube portion 31 in order from the attachment end, A flat surface 342 that extends along the cylinder surface of the inner cylinder portion 31 and continues to the surface 341, and a first locking surface 343 that is inclined toward the direction away from the inner cylinder portion 31 and continues to the flat surface 342. It is formed. However, the first locking surface 343 is inclined at a steeper inclination angle than the inclined surface 341. The first locking surface 343 is continuous with a second locking surface 344 that is erected in a direction orthogonal to the cylindrical surface of the inner cylindrical portion 31, and the second locking surface 344 is formed on the cylindrical surface of the inner cylindrical portion 31. It continues to the extending part 345 extending along the line. By the first locking surface 343 and the second locking surface 344, a protrusion having a right-angled triangular section that crosses the width direction of the leg portion 34 is formed on the outer wall surface of the leg portion 34.

<2. Insertion of Insertion Member 3 into Main Body Member 2>
As described above, the grommet 1 is formed by inserting the insertion member 3 into the gap V of the main body member 2. The insertion of the insertion member 3 into the gap V is performed by an operator by fitting the inner cylinder portion 31 of the insertion member 3 to the wire insertion portion 21 of the main body member 2, and the plurality of legs 34 included in the insertion member 3. This is performed by pushing the insertion member 3 into the gap V while slightly swinging inward (in a direction approaching the inner cylinder portion 31). Here, the grommet 1 can take two states, an unlocked state and a locked state, depending on the position of the insertion member 3 in the gap V.

<2-1. Unlocked state>
The non-lock state will be described with reference to FIG. FIG. 6 is a cross-sectional view of the grommet 1 in an unlocked state.

  When the inner cylindrical portion 31 of the insertion member 3 is fitted onto the wire insertion portion 21 of the main body member 2 and the leg portions 34 are slightly swung inward, the insertion member 3 is pushed into the gap V. At this point, the insertion member 3 comes to a position where the flat surface 342 of the leg portion 34 abuts against the inner wall of the tube portion 24 and the first locking surface 343 contacts the rear end surface of the tube portion 24. However, in this position, the insertion member 3 is in a state in which the top plate portion 32 does not contact the flange portion 22. When the leg portions 34 are elastically returned at this position, the leg portions 34 are hooked on the rear end surface of the cylindrical portion 24 at the first locking surfaces 343. This is an unlocked state.

  In the unlocked state, the first locking surface 343 is hooked on the rear end surface of the cylindrical portion 24, whereby the insertion member 3 is locked so as not to advance further to the back side of the gap V, and the flat surface 342. Comes into contact with the inner wall of the cylindrical portion 24 in a pressed state. As a result, the insertion member 3 is stably supported in the gap V with a gap between the top plate portion 32 and the flange portion 22.

<2-2. Locked state>
The locked state will be described with reference to FIG. FIG. 7 is a cross-sectional view of the grommet 1 in the locked state.

  From the unlocked state, each leg portion 34 is slightly swung inward to release the catch between the first locking surface 343 of each leg portion 34 and the rear end surface of the cylindrical portion 24. In this state, the insertion member is further inserted. When 3 is pushed into the gap V, the insertion member 3 is in a state where the top plate portion 32 is in contact with the flange portion 22 at a certain point in time. In this state, when the insertion member 3 is pushed in while further fixing the cylindrical portion 24, the expansion / contraction portion 23 extends, and at a certain point, the engagement surface 83 is more than the second locking surface 344 of the leg portion 34. Come to the rear side. When the leg portions 34 are elastically returned at this position, the leg portions 34 are hooked on the engagement surfaces 83 at the second locking surfaces 344. This is the locked state.

  In the locked state, the top plate portion 32 abuts on the flange portion 22 and the second locking surface 344 is hooked on the engaging surface 83. Here, in the insertion member 3, the separation length between the top plate portion 32 and the second locking surface 344 is larger than the length d2 of the expansion / contraction portion 23 of the main body member 2 in a natural state where no external force is applied. In this state, the body member 2 is elastically deformed into a shape in which the expandable portion 23 extends along the wire insertion portion 21 (d2> d3) and the maximum diameter portion 81 is reduced in diameter.

  In addition, from the locked state, each leg 34 is slightly swung inward to release the catch between the second locking surface 344 and the engaging surface 83 of each leg 34, and in this state, the insertion member 3 is moved. When the insertion member 3 is pulled out from the gap V, at a certain point in time, the insertion member 3 has the flat surface 342 of the leg portion 34 abutting against the inner wall of the cylindrical portion 24 and the first locking surface 343 on the rear end surface of the cylindrical portion 24. It comes to the position where it abuts. When the leg portions 34 are elastically returned at this position, the leg portions 34 are hooked on the rear end surface of the cylindrical portion 24 at the first locking surface 343, that is, the unlocked state. When the locked state is changed to the unlocked state, the grommet 1 is elastically restored, and the reduced diameter end portion 82 sandwiched between the maximum diameter portion 81 and the protruding portion 241 is constricted (see FIG. 6).

<3. Wearing grommet 1>
Next, a method for attaching the grommet 1 to the through hole H formed in the vehicle body panel P will be described with reference to FIG.

  First, the grommet 1 (however, the grommet 1 in an unlocked state) is externally fitted at a predetermined position in the extending direction of the wire harness 10 (first step). Specifically, in this step, the operator inserts the wire harness 10 into the wire insertion part 21 of the grommet 1 in the unlocked state, and externally fits the grommet 1 at a predetermined position of the wire harness 10. The tape T is wound around the wire insertion portion 21 and the wire harness 10 in the vicinity of the outlet of the wire insertion portion 21, and the wire harness 10 is fixed to the wire insertion portion 21. In FIG. 8, the tape T is indicated by a virtual line.

  Subsequently, the grommet 1 is changed from the unlocked state to the locked state (second step). The mode of changing the grommet 1 from the unlocked state to the locked state is as described above. By being in the locked state, the grommet 1 is elastically deformed into a shape in which the expansion / contraction part 23 of the main body member 2 extends along the wire insertion part 21 and the maximum diameter part 81 is reduced in diameter.

  Subsequently, the locked grommet 1 is inserted into the through hole H formed in the vehicle body panel P from the front side (the upper stage in FIG. 8), and the front surface of the protruding portion 241 is the front side surface of the vehicle body panel P (in the insertion direction). The surface is in contact with the front surface. As described above, since the grommet 1 in the locked state is elastically deformed into a shape in which the maximum diameter portion 81 is reduced in diameter, the operator can easily insert the grommet 1 into the through hole H without applying a large load. Can do. When the front surface of the protruding portion 241 is in contact with the front side surface of the vehicle body panel P, the lip 242 formed along the outer peripheral portion of the front surface of the protruding portion 241 is in close contact with the vehicle body panel P, and When the rib 243 formed on the outer surface of the cylinder is in close contact with the periphery of the through hole H, the space between the grommet 1 and the through hole H is sealed. This prevents water from entering through the gap between the grommet 1 and the through hole H.

  Subsequently, the grommet 1 is changed from the locked state to the unlocked state (third step). The mode of changing the grommet 1 from the locked state to the unlocked state is as described above. By being in the unlocked state, the grommet 1 is elastically restored, and the reduced diameter end portion 82 sandwiched between the maximum diameter portion 81 and the protruding portion 241 is constricted, whereby the grommet 1 is inserted into the through hole H. In a state in which it is prevented from coming off from the through hole H, it is inserted into the through hole H (lower stage in FIG. 8).

  In addition, the tape T for fixing the wire harness 10 is wound around the rear end of the electric wire insertion part 21, and is thickened by the thickness of this tape T (it is increasing in diameter). When the increased diameter portion abuts against the inner peripheral surface of the inner cylinder portion 31, the insertion member 3 is prevented from being detached from the main body member 2 in the unlocked grommet 1. . In addition, the rib for preventing the tear at the time of shape | molding the main body member 2 may be formed in the back end of the electric wire insertion part 21 along the circumferential direction of the cylinder of the electric wire insertion part 21, and in this case The portion becomes thicker by the thickness of the rib and the tape T. Therefore, the increased diameter portion comes into contact with the inner peripheral surface of the inner cylinder portion 31 in a particularly strongly pressed state, and the insertion member 3 is reliably prevented from being detached from the main body member 2. .

<4. Removal of grommet 1>
A method of removing the grommet 1 attached to the through hole H formed in the vehicle body panel P will be described with reference to FIG.

  When removing the grommet 1, first, the grommet 1 (lower stage in FIG. 8) attached to the vehicle body panel P in the unlocked state is set to the locked state. Then, the locked grommet 1 is pulled out from the through hole H (upper stage in FIG. 8). Since the grommet 1 is elastically deformed into a shape in which the maximum diameter portion 81 is reduced in the locked state, the operator can easily pull out the grommet 1 from the through hole H without applying a large load. Can do. Thereby, the grommet 1 can be removed from the vehicle body panel P.

<5. Effect>
According to the above-described embodiment, the operator can use the locking portion (specifically, the second locking surface 344) formed on the insertion member 3 and the wall surface (specifically, the gap V between the main body member 2). The grommet 1 is simply mounted in the through-hole H simply by changing the hooked state with the engaging surface 83) and changing the grommet 1 from the locked state to the unlocked state (or from the unlocked state to the locked state). be able to. Also, the grommet 1 can be easily removed from the through hole H.

  Moreover, according to said embodiment, the 2nd locking surface 344 is hooked on the engaging surface 83 by rocking each leg part 34 formed in the insertion member 3 (or a hook is cancelled | released). it can. Similarly, the first locking surface 343 can be hooked on the rear end surface of the cylindrical portion 24 (or the hook can be released). Therefore, the grommet 1 can be easily changed from the locked state to the unlocked state (or from the unlocked state to the locked state).

  In addition, according to the above embodiment, since the main body member 2 is formed of rubber or elastomer, the insertion member 3 is formed of resin, so when inserting the insertion member 3 into the gap V of the main body member 2. The friction generated between the main body member 2 and the insertion member 3 is smaller than when another member made of rubber is inserted into a member made of rubber, for example. Therefore, the insertion member 3 can be inserted into the gap V of the main body member 2 with a small load.

<6. Modification>
In the above-described embodiment, the configuration of the insertion member 3 is not necessarily limited to that described above, and can be fixed in a state where the expansion / contraction part 23 is extended in a state of being inserted into the gap V of the main body member 2. Anything may be used.

  In the above embodiment, the number of the leg portions 34 included in the insertion member 3 is not necessarily four.

  Moreover, in said embodiment, the through-hole H shall be elliptical shape, and according to this, both the outer cover part 20 of the main body member 2 and the outer cylinder part 33 of the insertion member 3 are ellipsoidal shape in planar view. However, the present invention is also applicable when the shape of the through hole H is not elliptical. For example, when the through hole H has a circular shape, the outer cover portion 20 of the main body member 2 and the outer cylindrical portion 33 of the insertion member 3 are both circular in a plan view.

DESCRIPTION OF SYMBOLS 1 Grommet 2 Main body member 3 Inner member 20 Outer cover part 21 Electric wire insertion part 22 Flange part 23 Expansion / contraction part 24 Tube part 31 Inner cylinder part 33 Outer cylinder part 34 Leg part 343 1st locking surface 344 2nd locking surface 81 Maximum diameter part 82 Reduced diameter end part 83 Engagement surface V Clearance

Claims (3)

A cylindrical wire insertion portion for inserting an electric wire, and an outer cover portion that is attached to the wire insertion portion at one end and extends along the wire insertion portion while forming a gap with the periphery of the wire insertion portion A body member comprising:
An insertion member inserted into the gap;
With
The outer covering portion is
A flange portion protruding from the outer periphery of the wire insertion portion; and
One end is attached to the flange portion, extends along the wire insertion portion while expanding from the installation end, and further extends while contracting the diameter through the maximum diameter portion and extends to the other end. When,
Continuing from the other end, a protruding portion protruding from the outer periphery of the other end,
With
In the locked state in which the distal end of the insertion member abuts on the flange portion and the engaging portion formed on the insertion member is caught on the wall surface of the gap, the main body member is inserted into the wire insertion portion. Elastically deformed into a shape in which the maximum diameter portion extends along the portion and the maximum diameter portion is reduced in diameter,
The grommet in which the main body member is elastically restored from the locked state to the unlocked state in which the catch between the engaging portion and the engaging surface is released. The grommet according to claim 1,
The insertion member is
A cylindrical inner tube portion that allows the wire insertion portion to be inserted therein;
A top plate portion formed by protruding from the outer periphery of the inner cylinder portion;
One end is attached to each position spaced apart from the outer edge of the top plate part, and the leg part extends along the cylinder direction of the inner cylinder part and continues to the free end;
With
The leg portion is formed so as to be swingable in a direction to be in contact with and away from the inner cylinder portion,
The locking part is formed in the middle of the extension of the leg part,
The grommet in which the catch between the locking portion and the wall surface is released by swinging the leg portion in a direction approaching the inner cylinder portion. The grommet according to claim 1 or 2,
The body member is formed from rubber or elastomer,
The insertion member is a grommet formed of resin.

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