JP2018007486A - Protector and mounting structure for grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve both prevention of scratch on a bundle of electric wires, and so on, during mounting of a grommet to a panel and improvement in workability in mounting the grommet.SOLUTION: A mounting structure 200 for a grommet comprises: an annular protector 100 mounted on a panel P so as to cover a peripheral edge part of a through-hole Pa provided in a plate-like panel P; and a grommet 10 mounted on the panel P so as to cover the protector 100. The protector 100 has: a cylindrical part 101 abutting on the inner peripheral surface of the through-hole Pa; an annular recessed part 104 provided at one end of the cylindrical part 101, the annular recessed part 104 covering a projecting end Pba of a cylindrical bar ring part Pb extending in a flange form from one side face of a circumferential edge part of the through-hole Pa and abutting on the inner peripheral surface Pb1 and outer peripheral surface Pb2 of the bar ring part Pb; and a projecting part 105 provided at the other end of the cylindrical part 101, the projecting part 105 abutting on another side face Pc of the peripheral edge part of the through-hole Pa.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an annular protector that is attached to a panel so as to cover a peripheral portion of a through-hole provided in a plate-like panel, and a grommet attachment structure that attaches a grommet to a panel via the protector.

  Conventionally, when wire harnesses (wire bundles) are routed so as to penetrate plate-like panels (eg, dash panels) that divide the interior and exterior of automobile cabins, the panels penetrate from the viewpoint of waterproofing and soundproofing. A grommet made of an elastic material is attached so as to close the gap between the hole and the wire bundle.

  For example, in one of the conventional grommet mounting structures (hereinafter referred to as “conventional structure”), a grommet made of rubber or the like is press-fitted into a circular through hole formed in the panel and extended from the grommet. By pressing the rib against the peripheral edge of the through hole (surface of the panel), the water tightness between the grommet and the panel is enhanced (for example, see Patent Document 1).

JP 2013-220020 A

  By the way, from the viewpoint of enhancing the water tightness between the grommet and the panel, a burring (a cylindrical flange extending from the peripheral edge of the through hole) is intentionally provided in the through hole of the panel in order to increase the contact area between the two. May be formed. On the other hand, when a through hole is formed by punching a panel with a die or the like, a burring-like punch mark may be unintentionally formed on the peripheral portion of the through hole due to this punching.

  On the other hand, the grommet is generally attached to the wire bundle in advance and attached to the through hole of the panel in such a state. Specifically, after the tip of the wire bundle extending from the position where the grommet is mounted is inserted into the through hole of the panel, the grommet is brought close to the through hole while the wire bundle is pulled out through the through hole, and the grommet is press-fitted into the through hole. It will be. Therefore, when the burring is formed in the through hole of the panel, the wire bundle can come into contact with the burring (particularly, the protruding end of the burring) in the process of attaching the grommet. At this time (particularly, when burrs or the like generated at the time of burring formation remain at the protruding end), the burring may damage the wire bundle.

  In order to avoid such damage to the wire bundle, for example, a method of winding a protective sheet around the wire bundle in advance and removing the protective sheet after the wire bundle has passed through the through hole can be considered. However, this method requires additional steps such as collection and disposal of the used protective sheet (or reuse of the collected protective sheet), and it is difficult to improve the workability of attaching the grommet.

  The present invention has been made in view of the above-described circumstances, and the object thereof is to make it possible to achieve both prevention of damage such as a bundle of electric wires when attaching the grommet to the panel and improvement in workability of attaching the grommet. It is providing the protector and the grommet attachment structure which attaches a grommet to a panel via this protector.

In order to achieve the above-described object, the “protector” according to the present invention is characterized by the following (1) and (2).
(1)
An annular protector attached to the panel so as to cover the peripheral edge of a through hole provided in the plate-shaped panel,
A cylindrical portion that comes into contact with the inner peripheral surface of the through hole;
An annular recess provided at one end portion of the cylindrical portion, covering a protruding end of a cylindrical burring portion extending in a flange shape from one side surface of the peripheral portion of the through-hole and inside the burring portion An annular recess to be in contact with the peripheral surface and the outer peripheral surface;
A protrusion provided at the other end of the cylindrical portion, the protrusion being in contact with the other side surface of the peripheral edge of the through-hole.
Be a protector.
(2)
The protector according to (1) above,
The shape of the through-hole is attached to the panel having a flat shape other than an aspect ratio of 1, and is used together with a grommet attached to the panel so as to cover the protector,
The cylindrical portion and the annular recess are
It has a flat shape corresponding to the shape of the through hole,
The protector is
A regulation part that engages with the grommet, further comprising a regulation part that regulates the rotational position of the grommet around the axis of the protector;
Be a protector.

  According to the protector having the above configuration (1), the protector is attached to the through hole of the panel in advance (before inserting the grommet and the wire bundle into the through hole), and the protruding end of the burring portion is covered by the annular recess of the protector. Thus, the protruding end of the burring portion (particularly, the burr that can remain at the protruding end) can be isolated from the periphery. Therefore, it is possible to prevent the bundle of electric wires from being damaged due to the contact with the protruding end of the burring portion.

  Furthermore, unlike the above-described protective sheet, it is sufficient for the protector to have a size enough to cover the peripheral edge of the through hole, so even if the grommet is attached to the panel and then left attached to the panel, It does not interfere with subsequent processes (such as a process of routing the wire bundle after the panel is inserted). Therefore, compared with the case where the protective sheet described above is used, the workability of attaching the grommet can be improved because the collection after the attaching of the grommet is unnecessary.

  Therefore, the protector of this configuration can achieve both prevention of damage to the wire bundle and the like when attaching the grommet to the panel and improvement in workability of attaching the grommet.

  In addition, when this protector is used, the grommet does not directly contact the panel (or the contact area directly contacting decreases), so unlike the conventional structure described above, the watertightness between the grommet and the panel is merely It is preferable to improve not only the property but also the water tightness between the protector and the panel. Regarding the latter watertightness, the annular recess of the protector comes into contact with both the inner and outer peripheral surfaces of the burring portion. Therefore, compared with the case where the protector contacts only one of the inner peripheral surface and the outer peripheral surface of the burring part (or when the protector does not contact either the inner peripheral surface or the outer peripheral surface), the protector and the panel The water tightness between them is improved. Therefore, even if this protector is attached to the through-hole, it is considered that the function (watertightness) originally required for the grommet attachment structure is not impaired.

  According to the protector having the configuration of (2) above, if the grommet (for example, the engaging portion formed on the grommet) is attached to the restricting portion of the protector, the relative rotation of the grommet with respect to the protector (ie , Misalignment in the rotation direction) can be prevented. In other words, the grommet is positioned. Therefore, as compared with the case where there is no such restricting portion, there is a problem that the grommet is fixed in a state where the grommet is displaced (tilted) with respect to the flat through hole (hereinafter referred to as “oblique mounting”). Can be prevented more reliably.

  From the standpoint of more reliably preventing the grommet from being obliquely attached, the protector is securely fixed at the correct position in the rotation direction with respect to the through hole of the panel (the position that is not inclined in the rotation direction with respect to the through hole). It is preferable. Regarding such fixing, the material forming the protector is preferably a material having lower flexibility than the material forming the grommet (for example, a resin harder than the rubber constituting the grommet).

  Furthermore, examples of flat shapes other than an aspect ratio of 1 include polygons such as ellipses, rectangles, and flat hexagons.

Furthermore, in order to achieve the above-mentioned object, the “grommet mounting structure” according to the present invention is characterized by the following (3) and (4).
(3)
An attachment structure comprising: an annular protector attached to the panel so as to cover a peripheral edge of a through hole provided in the plate-like panel; and a grommet attached to the panel so as to cover the protector,
The protector is
A cylindrical portion that contacts the inner peripheral surface of the through hole;
An annular recess provided at one end portion of the cylindrical portion, covering a protruding end of a cylindrical burring portion extending in a flange shape from one side surface of the peripheral portion of the through-hole and inside the burring portion An annular recess contacting the peripheral surface and the outer peripheral surface;
A projection provided on the other end of the cylindrical portion, the projection contacting the other side surface of the peripheral edge of the through hole,
Grommet mounting structure.
(4)
The mounting structure according to (3) above,
The shape of the through hole is a flat shape other than an aspect ratio of 1,
The cylindrical portion and the annular recess have a flat shape corresponding to the shape of the through hole,
The protector is
A restricting portion that engages with an engaging portion of the grommet, and further includes a restricting portion that restricts the rotational position of the grommet around the axis of the through-hole.
Grommet mounting structure.

  According to the mounting structure of the protector having the configuration of (3), the protector is attached to the through-hole of the panel in advance (before inserting the grommet, the bundle of wires, etc. into the through-hole) in the same manner as in (1) above. By covering the protruding end of the burring portion with the recess, the protruding end of the burring portion (particularly, the burr that may remain at the protruding end) can be isolated from the periphery. Therefore, it is possible to prevent the bundle of electric wires from being damaged due to the contact with the protruding end of the burring portion.

  Further, unlike the protective sheet described above, the protector of this mounting structure is sufficient if it has a size enough to cover the peripheral edge of the through hole, so that it remains attached to the panel after the grommet is attached to the panel. However, it does not interfere with subsequent processes (such as a process of routing the wire bundle after insertion of the panel). Therefore, compared with the case where the protective sheet described above is used, the workability of attaching the grommet can be improved because the collection after the attaching of the grommet is unnecessary.

  Therefore, the protector mounting structure of the present configuration can achieve both prevention of damage to the bundle of wires and the like when attaching the grommet to the panel and improvement in workability of attaching the grommet.

  In this mounting structure, the grommet is not in direct contact with the panel (or the contact area with which the grommet is in direct contact is reduced). Therefore, unlike the conventional structure described above, the watertightness between the grommet and the panel is simply It is preferable to increase the water tightness between the protector and the panel as well as increase the water resistance. Regarding the latter water-tightness, the annular recess of the protector of the present mounting structure comes into contact with both the inner peripheral surface and the outer peripheral surface of the burring portion. Therefore, compared with the case where the protector contacts only one of the inner peripheral surface and the outer peripheral surface of the burring part (or when the protector does not contact either the inner peripheral surface or the outer peripheral surface), the protector and the panel The water tightness between them is improved. Therefore, in this mounting structure, it is considered that the function (watertightness) originally required for the grommet mounting structure is not impaired.

  According to the mounting structure of the protector configured as described in (4) above, since the restricting portion of the protector and the engaging portion of the grommet are engaged as in (2) above, the relative rotation of the grommet relative to the protector (ie , Misalignment in the rotation direction) can be prevented. In other words, the grommet is positioned. Therefore, it is possible to more reliably prevent the grommet from being obliquely attached as compared with the case where there is no such restriction portion.

  As in (2) above, the material forming the protector is preferably a material that is less flexible than the material forming the grommet. Examples of flat shapes other than an aspect ratio of 1 include polygons such as ellipses, rectangles, and flat hexagons.

  According to the present invention, a protector capable of achieving both prevention of damage such as a bundle of wires when attaching a grommet to the panel and improvement in workability of attaching the grommet, and attaching the grommet to the panel via the protector. A grommet mounting structure can be provided.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading a form for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a grommet mounting structure according to the present embodiment. 2 is a view showing the protector shown in FIG. 1, FIG. 2 (a) is a side sectional view and a front view of the protector as a whole, and FIG. 2 (b) is an enlarged cross-sectional view showing the main part of the protector. FIG. FIG. 3 is a view showing a procedure when the protector and the grommet are attached to the panel, FIG. 3 (a) is a view showing a state before the protector is attached to the panel, and FIG. 3 (b) is a view showing the protector on the panel. FIG. 3C is a diagram showing a state in which the grommet is attached to the panel to which the protector is attached (that is, the final grommet attachment structure). FIG. 4 is a view showing a protector used in a grommet mounting structure according to a modification of the present embodiment. FIG. 4A is a side sectional view and a front view of the entire protector, and FIG. It is sectional drawing which expanded and showed the principal part of the protector. FIG. 5 is a cross-sectional view of a grommet mounting structure using the protector shown in FIG. FIG. 6 is an enlarged cross-sectional view showing the main part of the AA cross section of FIG.

<Embodiment>
Hereinafter, a protector 100 according to an embodiment of the present invention and a grommet mounting structure 200 using the protector will be described with reference to the drawings.

  As shown in FIG. 1, the mounting structure 200 is applied to a through-hole Pa provided in a flat panel P that separates the vehicle interior side and the vehicle interior side of the automobile, from the vehicle interior outside to the vehicle interior side. Used to prevent water ingress. In the example illustrated in FIG. 1, the through hole Pa is provided to insert the wire bundle W of the wire harness WH, and the shape of the through hole Pa is circular.

  The panel P is intentionally formed with a cylindrical flange (hereinafter referred to as “burring portion Pb”) that extends from the peripheral edge of the through hole Pa to the outside of the passenger compartment from the viewpoint of improving water tightness. The burring portion Pb may be a burring-like punch mark that is inevitably formed unintentionally when the panel P is punched with a die or the like to form the through hole Pa.

  Hereinafter, for the sake of convenience, the direction in which the burring portion Pb extends from the panel P (left direction in the figure) is referred to as “one direction”, and the opposite direction (right direction in the figure) is also referred to as “other direction”. Call it.

  As shown in FIG. 1, the attachment structure 200 includes an annular protector 100 attached to the panel P so as to cover the peripheral edge of the through hole Pa, a grommet 10 attached to the panel P so as to cover the protector 100, Is provided. The grommet 10 is attached to the wire bundle W of the wire harness WH. Thereby, the wire bundle W of the wire harness WH has penetrated the through-hole Pa of the panel P watertightly.

  The protector 100 is comprised from elastic bodies, such as resin and rubber | gum. On the other hand, the grommet 10 is also composed of an elastic body such as resin and rubber. Here, the material constituting the protector 100 is preferably a material having a lower flexibility than the material constituting the grommet 10 (typically, a rubber or resin harder than the resin constituting the grommet 10). .

  As shown in FIGS. 1 and 2, the protector 100 has a cylindrical tubular portion 101 and a diameter from the one end portion (left end portion in FIG. 2) in the axial direction of the tubular portion 101 to the entire circumference. A first portion 102 that extends outward in the direction, and a second portion 103 that extends from the radially outer end of the first portion 102 in the other axial direction (right direction in FIG. 2) over the entire circumference. . An annular shape that opens in another axial direction (right direction) by the outer peripheral surface of the cylindrical portion 101, the side surface in the other direction (right direction) of the first portion 102, and the inner peripheral surface of the second portion 103. An annular recess 104 is formed.

  As shown in FIG. 2A, the other end portion in the axial direction of the cylindrical portion 101 (the right end portion in FIG. 2A) has a plurality of (FIG. 2) arranged at equal intervals in the circumferential direction. In the example shown in (a), four (4) protrusions 105 are provided. The protruding portion 105 is a claw-shaped portion that extends radially outward from the other end (right end) of the tubular portion 101. The end surface of the protrusion 105 in the other axial direction (right direction) is an inclined surface 105a that is inclined from a plane orthogonal to the axial direction. The protrusion 105 may be a flange-shaped portion that extends radially outward from the other end of the tubular portion 101 over the entire circumference.

  As shown in FIG. 2B, in a state where the protector 100 is attached to the through hole Pa of the panel P (see the broken line in the figure), the cylindrical portion 101 of the protector 100 has an inner periphery of the through hole Pa. Contact the surface. The annular recess 104 of the protector 100 covers the protruding end Pba of the burring portion Pb of the panel P and abuts (adheres) to the inner peripheral surface Pb1 and the outer peripheral surface Pb2 of the burring portion Pb. The bottom surface of the annular recess 104 (that is, the right side surface in the drawing of the first portion 102) may or may not contact the protruding end Pba of the burring portion Pb (in this example, contact). ing.). As described above, the annular recess 104 covers the burring portion Pb, so that watertightness between the protector 100 and the panel P is ensured, and the protector 100 is moved from the panel P to another axial direction (right direction). The omission is prevented.

  As shown in FIG. 2B, in a state where the protector 100 is attached to the through hole Pa of the panel P, the plurality of protrusions 105 of the protector 100 are formed on the other side surface Pc of the peripheral portion of the through hole Pa of the panel P. (Right side surface in the figure). This prevents the protector 100 from coming off from the panel P in one axial direction (left direction).

  Referring again to FIG. 1, the grommet 10 has a large-diameter cylindrical portion 11 fitted in the through hole Pa of the panel P to which the protector 100 is attached, and 2 extending from the large-diameter cylindrical portion 11 to both sides in the axial direction. There are two tapered cylindrical connecting shielding walls 12 and 13 and small diameter cylindrical portions 14 and 15 arranged on the inner peripheral side of the connecting shielding walls 12 and 13.

  The large-diameter cylindrical portion 11 includes an annular engaging groove 16 that is fixed to the through-hole Pa of the panel P to which the protector 100 is attached and that opens radially outward. The engagement groove 16 is defined by a bottom surface 17, a side surface 18 on the vehicle interior side, and a side surface 19 on the vehicle interior side. The large-diameter cylindrical portion 11 includes an extending portion 20 that extends diagonally from the end portion on the radially outer side of the side portion constituting the side surface 18 to the outer side in the radial direction and toward the vehicle interior side, and the side surface 19. An extending portion 21 that extends obliquely from the end portion on the outer side in the radial direction of the side portion to the outer side in the radial direction and toward the outer side of the passenger compartment.

  As shown in FIG. 1, in a state where the grommet 10 is attached to the through-hole Pa of the panel P to which the protector 100 is attached, the bottom surface 17 of the engagement groove 16 of the grommet 10 is the cylindrical portion 101 ( The side surface 18 of the engagement groove 16 is on one side surface (left side surface) of the first portion 102 (see FIG. 2) of the protector 100. Abutting (adhering). Thereby, the watertightness between the protector 100 and the grommet 10 is ensured.

  Further, as shown in FIG. 1, in the state where the grommet 10 is attached to the through hole Pa of the panel P to which the protector 100 is attached, the extending portion 20 and the extending portion 21 of the grommet 10 are respectively connected to the panel P. The vehicle is in contact (contact) with the outer side surface and the side surface of the vehicle interior. Thereby, the watertightness between the panel P and the grommet 10 is ensured.

  The two tapered cylindrical connection shielding walls 12 and 13 gradually become smaller in diameter as they move away from the large diameter cylindrical portion 11 to which the outer peripheral ends are connected. And the small diameter cylinder parts 14 and 15 are connected with the inner peripheral end of the connection shielding walls 12 and 13 used as the small diameter. The small diameter cylindrical portions 14 and 15 are portions that are arranged close to or in close contact with the outer periphery of the wire bundle W. A sound insulation space S is formed around the wire bundle W by the large diameter cylindrical portion 11, the connecting shielding walls 12 and 13, and the small diameter cylindrical portions 14 and 15 configured as described above.

  The electric wire bundle W is inserted into the small diameter cylindrical portions 14 and 15 by a known method, and the outer periphery of the electric wire bundle W is in close contact with the small diameter cylindrical portions 14 and 15. Thereby, the watertightness between the wire bundle W and the grommet 10 is ensured. In addition, you may provide the water stop part 30 by which the clearance gap between the wire bundles W was sealed inside the small diameter cylinder parts 14 and 15 as needed. The water stop part 30 is formed by inject | pouring the water stop agent 31 into the clearance gap between the electric wires which comprise the wire bundle W, and solidifying, for example. The water stopping agent 31 may be injected before or after the wire bundle W is inserted into the small diameter cylindrical portions 14 and 15. With such a configuration, the water tightness between the wire bundle W and the grommet 10 can be further ensured.

  In the example shown in FIG. 1, the small-diameter cylindrical portion 14 is fixed to the wire bundle W by winding a tie band, a tape 40, and the like around the small-diameter cylindrical portion 14 outside the passenger compartment of the grommet 10. Similarly, the small diameter cylindrical portion 15 is fixed to the electric wire bundle W by winding a tie band, a tape 40, and the like around the small diameter cylindrical portion 15 on the vehicle interior side of the grommet 10. Thereby, the grommet 10 is more reliably fixed to the wire bundle W.

  Next, a procedure for attaching the protector 100 and the grommet 10 to the panel P will be described with reference to FIG.

  As shown in FIG. 3A, first, the protector 100 is attached to the through hole Pa of the panel P from the outside of the passenger compartment. The attachment of the protector 100 to the panel P is achieved simply by pressing the protector 100 against the panel P from the outside of the passenger compartment. That is, the protector 100 is pressed toward the vehicle interior side against the panel P in a state where the inclined surface 105a of each protrusion 105 of the protector 100 is in contact with the protruding end Pba of the burring portion Pb of the panel P. Then, each projection 105 is elastically deformed radially inward and enters the through hole Pa.

  When the tip of each protrusion 105 passes through the through hole Pa by continuing pressing in this state, each protrusion 105 is elastically restored and spreads radially outward as shown in FIG. In this state, the annular recess 104 of the protector 100 covers the protruding end Pba of the burring part Pb, contacts (adheres to) the inner peripheral surface Pb1 and the outer peripheral surface Pb2 of the burring part Pb, and each protrusion 105. However, it contacts the other side surface Pc of the peripheral portion of the through hole Pa. That is, the attachment of the protector 100 is completed.

  Next, as shown in FIG. 3C, the grommet 10 through which the wire bundle W is inserted is attached to the through hole Pa of the panel P to which the protector 100 is attached. When the wire bundle W is inserted into the through hole Pa for this attachment, the annular recess 104 of the protector 100 covers the protruding end Pba of the burring portion Pb, and therefore remains at the protruding end Pba (and the protruding end Pba of the burring portion Pb). Burr) does not contact the wire bundle W or the like.

  The grommet 10 is attached to the panel P by, for example, elastically deforming the large-diameter cylindrical portion 11 of the grommet 10 radially inward so that the engagement groove 16 is attached to the through hole Pa (more specifically, the through hole Pa. This is achieved by fitting it into the protector 100).

  In this state, as shown in FIG. 1, the bottom surface 17 of the engagement groove 16 is in contact with (in close contact with) the inner peripheral surface of the cylindrical portion 101 of the protector 100, and the side surface 18 of the engagement groove 16 is The protector 100 is in contact (contact) with one side surface of the first portion 102. In addition, the extending portion 20 and the extending portion 21 of the grommet 10 are in contact (contact) with the outer side surface and the inner side surface of the panel P, respectively. Thereby, the attachment of the grommet 10 is completed.

  Thus, according to the attachment structure (attachment structure 200) of the grommet 10 using the protector 100 according to the embodiment of the present invention, the protector 100 is inserted in advance (before the grommet 10 and the wire bundle W are inserted into the through hole Pa). (Ii) Attaching to the through hole Pa of the panel P and covering the protruding end of the burring portion Pb with the annular recess 104 of the protector 100, thereby isolating the protruding end of the burring portion Pb (especially burrs that may remain at the protruding end) from the periphery. it can. Therefore, it is possible to prevent the wire bundle W and the like from being damaged due to the contact with the protruding end of the burring portion Pb.

  Furthermore, since it is sufficient for the protector 100 to have a size enough to cover the peripheral edge of the through hole Pa, even if the grommet 10 is left attached to the panel P after being attached to the panel P, the subsequent process ( This does not hinder the process of routing the wire bundle W after the panel P is inserted. Therefore, the workability of attaching the grommet 10 can be improved by the amount that collection after the attachment of the grommet 10 is unnecessary.

  Therefore, the protector 100 having this configuration can achieve both prevention of the wire bundle W from being damaged when the grommet 10 is attached to the panel P and improvement in workability of attaching the grommet 10.

  When the protector 100 is used, the grommet 10 is not in direct contact with the panel P (or the contact area with which the grommet is in direct contact is reduced), so that the watertightness between the grommet 10 and the panel P is simply increased. Instead, it is preferable to increase the watertightness between the protector 100 and the panel P. Regarding the latter watertightness, the annular recess 104 of the protector 100 comes into contact with both the inner peripheral surface Pb1 and the outer peripheral surface Pb2 of the burring portion Pb. Therefore, when the protector 100 contacts only one of the inner peripheral surface Pb1 and the outer peripheral surface Pb2 of the burring portion Pb (or when the protector 100 does not contact either the inner peripheral surface Pb1 or the outer peripheral surface Pb2). In comparison, the watertightness between the protector 100 and the panel P is improved. Therefore, even if the protector 100 is attached to the through hole Pa, the function (watertightness) originally required for the attachment structure 200 of the grommet 10 is not impaired.

<Other aspects>
In addition, this invention is not limited to said each embodiment, A various modification is employable within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like can be made as appropriate. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, in the above-described embodiment, the shape of the through hole Pa of the panel P is a circle (a regular circle), but the shape of the through hole Pa may be a flat shape other than an aspect ratio of 1. For example, when the shape of the through hole Pa (and the shape of the burring portion Pb) is elliptical, as shown in FIG. 4, the tubular portion 101 and the annular recess 104 of the annular protector 100 are provided to ensure water tightness. Is also configured to have an elliptical shape corresponding to the shape of the through hole Pa.

  Thus, when the through-hole Pa is a flat shape different from a perfect circle, as shown in FIGS. 4-6, the engaging part 22 (refer especially FIG.5 and FIG.6) is provided in the grommet 10, and a protector is provided. 100 is preferably provided with a restricting portion 106 that engages with the engaging portion 22 of the grommet 10.

  In the example shown in FIGS. 4 to 6, a plurality of (two in the example shown in FIG. 4A) arranged at equal intervals in the circumferential direction at the radially outer end of the first portion 102 of the protector 100. A regulating unit 106 is provided. The restricting portion 106 is a convex portion that extends radially outward from the radially outer end of the first portion 102.

  On the other hand, a plurality of (two in this example) engaging portions 22 are provided on the inner root portion of the extending portion 20 of the grommet 10 at positions corresponding to the plurality of restricting portions 106 in the circumferential direction. It has been. Each engaging portion 22 is a concave portion that is recessed outward in the radial direction.

  In this way, when the engaging portion 22 of the grommet 10 is attached to the restricting portion 106 of the protector 100, the relative rotation of the grommet 10 with respect to the protector 100 (that is, misalignment in the rotating direction). Can be prevented. In other words, the grommet 10 is positioned. Therefore, compared with the case where there is no such restricting portion, the oblique mounting of the grommet 10 can be more reliably prevented.

  Furthermore, from the viewpoint of further reliably preventing the oblique mounting of the grommet 10, the protector 100 is in a correct position in the rotation direction with respect to the through hole Pa of the panel P (a position where the protector 100 is not inclined in the rotation direction with respect to the through hole Pa). It is preferable that it is fixed securely. Regarding such fixing, the material forming the protector 100 is preferably a material having lower flexibility than the material forming the grommet 10 (for example, a resin harder than the rubber constituting the grommet 10).

  Furthermore, in the example shown in FIG. 6, the restricting portion 106 of the protector 100 has a convex shape, and the engaging portion 22 of the grommet 10 has a concave shape. However, these irregularities may be reversed, the restricting portion 106 may have a concave shape, and the engaging portion 22 may have a convex shape. Further, a structure other than the unevenness as shown in FIG. 6 (for example, a structure in which a columnar portion is formed in the protector 100 and an insertion hole into which the columnar portion is inserted is formed in the grommet 10) may be employed.

  In addition, in the examples shown in FIGS. 4 to 6, the shape of the through hole Pa is an ellipse, but the shape of the through hole Pa is a flat shape other than an aspect ratio of 1 (for example, a rectangle, a flat hexagon, etc.). Polygon).

Here, the features of the above-described embodiments of the “protector” and the “grommet mounting structure” according to the present invention are summarized and listed in the following (1) to (4), respectively.
(1)
An annular protector (100) attached to the panel so as to cover the peripheral edge of a through hole (Pa) provided in the plate-like panel (P),
A cylindrical portion (101) that comes into contact with the inner peripheral surface (Pb1) of the through hole;
An annular recess (104) provided at one end of the cylindrical portion (101), which extends in a flange shape from one side surface (left side surface in FIG. 2b) of the peripheral portion of the through hole (Pa). An annular recess (104) that covers the protruding end (Pba) of the cylindrical burring portion (Pb) and that contacts the inner peripheral surface (Pb1) and the outer peripheral surface (Pb2) of the burring portion;
A protrusion (105) provided at the other end of the cylindrical portion (101), which is in contact with the other side surface (the right side surface in FIG. 2b) of the peripheral edge of the through hole (Pa). A protrusion (105) comprising:
Protector.
(2)
The protector according to (1) above,
The shape of the through hole (Pa) is attached to the panel having a flat shape other than an aspect ratio of 1, and is used together with a grommet (10) attached to the panel so as to cover the protector (100),
The tubular portion (101) and the annular recess (104) are
It has a flat shape corresponding to the shape of the through hole (Pa),
The protector (100) is
A regulation part (106) that engages with the grommet (10), and further comprises a regulation part (106) that regulates the rotational position of the grommet around the axis of the protector;
Protector.
(3)
An annular protector (100) attached to the panel so as to cover the peripheral edge portion of a through hole (Pa) provided in the plate-like panel (P), and attached to the panel so as to cover the protector (100). A mounting structure (200) comprising a grommet (10),
The protector (100)
A cylindrical portion (101) that contacts the inner peripheral surface (Pb1) of the through hole;
An annular recess (104) provided at one end of the cylindrical portion (101), which extends in a flange shape from one side surface (left side surface in FIG. 2b) of the peripheral portion of the through hole (Pa). An annular recess (104) that covers the protruding end (Pba) of the cylindrical burring portion (Pb) and contacts the inner peripheral surface (Pb1) and the outer peripheral surface (Pb2) of the burring portion;
A protrusion (105) provided at the other end of the cylindrical part (101), which is in contact with the other side surface (the right side surface in FIG. 2b) of the peripheral edge of the through hole (Pa). (105)
Grommet mounting structure.
(4)
The mounting structure (200) according to (3) above,
The shape of the through hole (Pa) is a flat shape other than an aspect ratio of 1,
The cylindrical portion (101) and the annular recess (104) have a flat shape corresponding to the shape of the through hole (Pa),
The protector (100) is
A restricting portion (106) that engages with an engaging portion (22) of the grommet (10), and further restricting the turning position of the grommet around the axis of the through hole; Have
Grommet mounting structure.

DESCRIPTION OF SYMBOLS 10 Grommet 22 Engagement part 100 Protector 101 Cylindrical part 104 Annular recessed part 105 Projection part 106 Restriction part 200 Grommet mounting structure P Panel Pa Through hole Pb Burring part Pba Projection end Pb1 Inner peripheral surface Pb2 Outer peripheral surface Pc Other side surface

Claims (4)

An annular protector attached to the panel so as to cover the peripheral edge of a through hole provided in the plate-shaped panel,
A cylindrical portion that comes into contact with the inner peripheral surface of the through hole;
An annular recess provided at one end portion of the cylindrical portion, covering a protruding end of a cylindrical burring portion extending in a flange shape from one side surface of the peripheral portion of the through-hole and inside the burring portion An annular recess to be in contact with the peripheral surface and the outer peripheral surface;
A protrusion provided at the other end of the cylindrical portion, the protrusion being in contact with the other side surface of the peripheral edge of the through-hole.
Protector. The protector according to claim 1,
The shape of the through-hole is attached to the panel having a flat shape other than an aspect ratio of 1, and is used together with a grommet attached to the panel so as to cover the protector,
The cylindrical portion and the annular recess are
It has a flat shape corresponding to the shape of the through hole,
The protector is
A regulation part that engages with the grommet, further comprising a regulation part that regulates the rotational position of the grommet around the axis of the protector;
Protector. An attachment structure comprising: an annular protector attached to the panel so as to cover a peripheral edge of a through hole provided in the plate-like panel; and a grommet attached to the panel so as to cover the protector,
The protector is
A cylindrical portion that contacts the inner peripheral surface of the through hole;
An annular recess provided at one end portion of the cylindrical portion, covering a protruding end of a cylindrical burring portion extending in a flange shape from one side surface of the peripheral portion of the through-hole and inside the burring portion An annular recess contacting the peripheral surface and the outer peripheral surface;
A projection provided on the other end of the cylindrical portion, the projection contacting the other side surface of the peripheral edge of the through hole,
Grommet mounting structure. The mounting structure according to claim 3,
The shape of the through hole is a flat shape other than an aspect ratio of 1,
The cylindrical portion and the annular recess have a flat shape corresponding to the shape of the through hole,
The protector is
A restricting portion that engages with an engaging portion of the grommet, and further includes a restricting portion that restricts the rotational position of the grommet around the axis of the through-hole.
Grommet mounting structure.

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