JP2007227026A - Grommet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To confirm the mounting of a panel of a grommet easily without increasing the number of components. <P>SOLUTION: In the grommet, an inner member 1 formed by a resin material is internally fitted to an outer member 10 made of rubber or elastomer, a lock member 4 for locking that passes through a through-hole H of a panel P and is locked to the back side is provided at the outer periphery of a cylinder 2 of the inner member 1, and a seal for holding the panel P in cooperation with the locking member 4 for locking is formed at the end face side of the outer member 10. In the grommet, the lock member 4 for locking is provided at least at two opposing positions; and a rotation support X in a rotation operation that shrinks inside when passing the through-hole H of the panel P in the lock member 4 for locking, and returns to the outside after the passage is provided above an end 2A of the cylinder 2 of the inner member 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a grommet that is mounted to pass an electric wire through a through hole of a panel of an automobile body or an electric device.

  A wire harness that traverses a vehicle body panel that partitions an automobile engine compartment and a vehicle compartment is routed through a through hole provided in the vehicle body panel. Grommets are attached to the through holes in order to ensure waterproofness, dustproofness, soundproofing properties, etc. with respect to the throughholes. As such a grommet, as shown in FIG. 6, a separate indoor inner outer 100 and outdoor outer 200 made of rubber or elastomer are connected and integrated by tightly fixing the ring-shaped inner 101 and the double cylindrical member 201. It is attached to the through hole H of the vehicle body panel P in a state of being converted. A grommet is known in which a wire harness W / H that passes through a through hole H of a vehicle body panel P that partitions an interior X and an engine room Y that is an outdoor side is inserted.

  As shown in FIG. 7, the indoor-side outer 100 is formed of a flange-shaped ring member that covers the periphery of the elliptical through-hole H, and at one end side 100 </ b> A that faces the indoor surface when mounted on the vehicle body panel P, The indoor lip portion 100B is double and continuously protrudes from the periphery, and a groove portion 100D for attaching the ring-shaped inner 101 is recessed in the inner surface 100C. The ring-shaped inner 101 is made of resin, and at one end 101B of the elliptical and short cylindrical peripheral wall portion 101A, an outer flange portion 101D projects from the outer peripheral surface 101C to the periphery and also from the inner peripheral surface 101E. The collar part 101F is projected. In addition, protrusions 101G protrude from the outer peripheral surface 101C at the peripherally facing parts on the long axis side of the peripheral wall part 101A, and the peripheral wall parts 101A on the opposing part on the short axis side have a rectangular shape as a locking part. A locking piece 101H having flexibility is formed by notching, and a claw portion 101I is projected from the tip of the locking piece 101H. The ring-shaped inner 101 is integrated by fitting one end portion 101B of the peripheral wall portion 101A into the inner surface 100C of the indoor-side outer 100 and fitting the outer flange portion 101D into the groove portion 100D, and the other end portion 101J side of the peripheral wall portion 101A. It protrudes outward in the axial direction from the indoor outer 100.

The outdoor-side outer 200 has a large-diameter cylindrical portion 200C continuous through a large-diameter cylindrical portion 200B from a small-diameter cylindrical portion 200A that externally fits the wire harness W / H and the through-hole H mounting side of the large-diameter cylindrical portion 200C It consists of rubber | gum or an elastomer which attached the double cylinder member 201 to the outer periphery of the front-end | tip part 200D. The double cylinder member 201 is resin-molded, and an inner wall portion 201A and an outer wall portion 201B are provided with a gap from the distal end side, and an engagement lever provided with an opening hole for engagement at a location facing the protrusion 101G. 202 is provided to be retractable, and the indoor outer 100 is attached to the through hole H from the indoor surface X side of the vehicle body panel P, while the outdoor outer 200 is attached to the through hole H from the outdoor surface Y side of the vehicle body panel P. The peripheral wall portion 101A of the ring-shaped inner 101 is fitted into the gap between the inner wall surface 201A and the outer wall surface 201B, and the protrusion 101G is fitted into the opening hole of the tilted engagement lever 202 so that the engagement lever 202 is engaged. By adopting a vertical state, the indoor outer 100 and the outdoor outer 200 are closely fixed to the vehicle body panel P (see Patent Document 1).
Japanese Patent Laying-Open No. 2003-23718 (4th and 5th pages, FIGS. 1 and 2)

  In the conventional example described in Patent Document 1, in order to confirm that the grommet is securely attached to the vehicle body panel, the state of the engagement lever must be visually confirmed. However, there are cases in which it is impossible to see from the shape of the vehicle body, the assembly position, etc., and in this case, the mounting failure of the grommet may be overlooked. Furthermore, in the conventional structure, as described above, the number of parts is increased and the cost is increased.

  Therefore, the present invention can confirm the mounting or mounting state of the grommet to the panel with a simple operation, and ensure the mounting, improve the waterproofness by the reliable mounting, reduce the number of parts, and reduce the cost. The purpose is to provide.

  In order to achieve the above-mentioned object, the present invention inserts an inner member made of a resin material into an outer member made of rubber or elastomer, and passes through a through hole of the panel on the outer periphery of the cylindrical portion of the inner member. A locking grommet provided with a locking member to be locked on the back side thereof, and having a seal portion for clamping the panel in cooperation with the locking member for locking on the end surface side of the outer member, the locking lock Two members are provided at least at opposing positions, and when the locking lock member passes through the through-hole of the panel, the member is retracted inward, and after the passage, the pivoting fulcrum of the pivoting operation returns to the end of the tubular portion of the inner member. It is provided above.

  According to the present invention, an inner member formed of a resin material is fitted into an outer member made of rubber or elastomer, and the outer peripheral portion of the inner member passes through a through hole of the panel and is locked to the back side. In a grommet provided with a locking member for locking and forming a seal portion for clamping the panel in cooperation with the locking member for locking on the end surface side of the outer member, the locking lock member is positioned at a position facing at least 2 Since the rotation support point of the rotation operation that shrinks inward when passing through the through-hole of the panel of the locking member for locking and returns to the outside after passing is provided above the end of the cylindrical portion of the inner member, The insertion force of the inner member into the panel through-hole can be reduced, and if even one of the locking members for locking is not securely locked to the panel, the inserted grommet can be pulled out. If that, since the pivot point X exits easily from the through hole because it is above the end of the tubular portion, it is possible to confirm that the lock is incomplete. On the other hand, when all the locking members for locking are securely locked, it is difficult to pull out the grommet once inserted and securely attached to the panel. Therefore, it is possible to confirm whether or not the grommet is securely attached only by performing an operation of pulling it out after inserting the grommet into the through hole. Further, the engagement lever and the protrusion are not required, the number of parts is small, and the cost can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show an inner member 1 of a grommet, and the inner member 1 is fitted into an outer member 10 described later. A flange 3 projecting radially outward is formed on the lower end side in the drawing of the cylindrical portion 2 which is the main body portion of the inner member 1, and a pivotal fulcrum is provided at a position protruding above the upper end side in the drawing. Locking lock members 4 having X are provided at two locations on the outer periphery of the cylindrical portion 2 (positions facing each other). The pair of locking lock members 4 are coupled so as to extend obliquely downward from the upper part of the support wall 5 formed integrally with the cylindrical part 2. The upper portions of these support walls 5 extend so as to slightly protrude upward from the end portion 2A (upper end in the drawing) of the cylindrical portion 2. The coupled portion of the support wall 5 and the locking member 4 serves as a rotation fulcrum X of the locking member 4. When the locking member 4 for locking passes through the through hole H of the panel P shown in FIG. 3, the locking member 4 is inserted into the through hole H from the end 2 </ b> A side of the cylindrical portion 2 at this time, On the other hand, the locking member 4 that extends obliquely so that the tip gradually moves away from the rotation fulcrum X is pushed inward (in the direction approaching the cylindrical portion 2) by the through hole H, and the tip 4A penetrates. When it comes out of the hole H, it returns to its original position so as to open outward due to its springiness, and the stepped portion on the front side of the front end portion 4A, that is, the lock portion 4B engages with the panel P. If it tries to pull out in this state, the lock part 4B of the locking member 4 for engagement will engage with the edge of the through-hole H, and the return of the inner member 1 will be prevented. If the inner member 1 is inserted obliquely with respect to the panel P and is to be pulled out after insertion, the pivot fulcrum X is above the end 2A of the cylindrical portion 2 and is not locked. The locking member 4 is pushed inward and moves in the direction of easy pulling, and the cylindrical portion 2 is easily pulled out, and the locking side can be easily pulled out by shifting sideways. Therefore, the reliability of the locked state of the locking member 4 can be confirmed by this insertion and the subsequent pulling operation.

  The flange 3 is formed with a locking piece 3A and a notch 3B. The notch 3B is used when fitting into an outer member 10 described later, and the locking piece 3A is used for attachment. . Further, the entire inner member 1 is integrally formed of a resin material and is relatively hard.

  FIG. 4 shows a cross section in a state where the inner member 1 is fitted and fitted to the outer member 10 and can be inserted from the end 2A of the tubular portion 2 of the inner member 1 into the through hole H of the panel P. FIG. The cross section of the state which inserted in the hole H and attached the grommet to the panel P normally is shown.

  The outer member 10 includes a cylindrical portion 11 for passing an electric wire, a pedestal portion 12 that holds the inner member 1, and a seal portion 13 that is formed over the entire circumference of the end surface of the pedestal portion 12. The outer member 10 is formed from a flexible material such as rubber or elastomer. The grommet is attached to the panel P by sandwiching the panel P between the thin seal portion 13 and the locking member 4 for locking. Grommet refers to an inner member 1 fitted into an outer member 10. The state shown in FIG. 5 is a state in which the grommet is correctly attached, and the lock portion 4B of the locking member 4 for locking is in contact with the edge of the through hole H of the panel P, and the seal portion 13 is bent. Thus, it is in a state of exerting a sealing function of being in close contact with the surface of the panel P and preventing intrusion of water or dust from the through hole H.

  In a state where the grommet is not correctly attached to the panel P, as described in the relationship between the inner member 1 and the panel P, the locking portion 4B of the locking member 4 for locking is formed in the through hole H of the panel P. When the inserted grommet is pulled out in a state where it is not securely in contact with the edge, the grommet is easily pulled out, so that it is possible to confirm a mounting failure of the grommet. For example, when only one of the two locking members for locking 4 is not properly engaged with the edge of the through hole H, when the grommet is pulled out, the rotation fulcrum X of the locking member for locking 4 is Since it is above the end portion 2A of the cylindrical portion 2, the locking member 4 that is not locked is pushed inward by the panel P and pulled back together with a part of the short cylindrical portion 2, and the other side. If the locking portion 4B of the locking member 4 is also shifted laterally, the panel P is disengaged and the grommet can be pulled out.

The perspective view of an inner member. The perspective view which made the inner member the half cross section. The front view which shows the relationship between an inner member and a panel. Sectional drawing of a grommet. Sectional drawing of the state which attached the grommet to the panel. The perspective view which shows a prior art example. The perspective view of the indoor side outer member of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner member 2 Cylindrical part 2A End part 4 Locking member 5 Locking wall 10 Outer member 13 Sealing part X Rotation fulcrum P Panel H Through-hole

Claims (3)

An inner locking member formed of a resin material is fitted inside an outer member made of rubber or elastomer, and the locking member is locked on the back side of the inner member through the through hole of the panel on the outer periphery of the tubular portion. In the grommet in which a seal portion is formed on the end surface side of the outer member in cooperation with the locking member for locking, and sandwiches the panel.
Two locking members for locking are provided at least at opposing positions,
A rotation fulcrum of a rotation operation that shrinks inward when the locking lock member passes through the through-hole of the panel and returns to the outside after passing is provided above the end of the cylindrical portion of the inner member. Grommet.   2. The grommet according to claim 1, wherein the locking member for locking includes a lock portion formed on an outer side near a tip portion thereof, and the lock portion is configured to lock to a peripheral edge of the through hole.   When the inner member is inclined with respect to the through-hole and the inner member is pulled back in a state where at least one lock portion is not locked, it is easy to pull out the tubular portion below the rotation fulcrum of the locking member for locking. The grommet according to claim 1 or 2, wherein

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