Grommet

Abstract

The grommet is provided with: a hard resin base member (10X); and a grommet main body (60) which is integrally formed from an elastically deformable soft resin water stop member (60A) and a hard resin support member (60B) and which is assembled to the base member, and which is provided with a plurality of engagement mechanisms (80) around the cylindrical axis of the base member between the base member and the support member. An engagement mechanism (80) holds the base member and the grommet main body in an assembly completion position by engaging a first engagement portion (81) of the base member and a second engagement portion (82) of the support member, one of the first engagement portion and the second engagement portion being formed in a cavity shape that opens in an orthogonal direction orthogonal to the cylinder axis, and the first engagement portion and the second engagement portion being formed in a cavity shape that opens in an orthogonal direction orthogonal to the cylinder axis. The other one is formed in a protruding shape that is inserted into the cavity shape from the opening in the orthogonal direction.

Description

Technical Field

[0001] The present invention relates to a grommet. Background Art

[0002] Conventionally, in a wiring harness, a wiring material such as an electric wire is inserted through a through-hole provided in an insertion object (e.g., a panel of a vehicle body), so that the wiring material is introduced from one space separated by the insertion object to the other space. Therefore, in order to protect the wiring material from being damaged by the periphery of the through-hole and to prevent liquid from entering the gap between the through-hole and the wiring material, a grommet for blocking the gap is installed in the insertion object. For example, the grommet is composed of a base member and a ring-shaped grommet body. The base member is made of a hard synthetic resin material, and the wiring material passes through the inside between one space and the other space. The ring-shaped grommet body is made of a flexible synthetic resin material such as rubber. The grommet is inserted into the through-hole, and the grommet body is brought into close contact with the periphery of the through-hole in the insertion object. In this grommet, the base member and the grommet body are integrally formed by an integral molding method such as two-color molding. Such a grommet is disclosed, for example, in Patent Document 1 below.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 8-251769 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] However, in the conventional grommet, when pulling out the mold for integrally molding the base member and the grommet body, it is necessary to suppress a decrease in the quality of the flexible grommet body by reducing the load applied to the grommet body from the mold. However, in this grommet, since the wiring material passes through the inside between one space and the other space, the base member has a larger volume than the grommet body, and the shape of the base member is likely to be complicated. Therefore, depending on the shapes of the base member and the grommet body, an overload from the mold to the grommet body cannot be avoided. Therefore, in this case, the base member and the grommet body are separately prepared as different components, and by assembling them, the load from the mold during molding of the grommet body can be reduced. However, in this grommet, it is necessary to hold each other between the base member and the grommet body at the assembled position.

[0008] Therefore, an object of the present invention is to provide a grommet capable of ensuring a holding force between two components.

[0009] Means for Solving the Problems

[0010] The grommet of the present invention is characterized in that it has: a cylindrical base member made of a hard synthetic resin material and having a conductive wiring material inserted therethrough for passing an insertion object from one space to another space through a through hole; and an annular grommet body coaxially assembled to the base member and disposed in the one space at an assembly completion position on the peripheral portion of the through hole of the insertion object. The base member has: an annular flange disposed in the one space at the assembly completion position and having an outer peripheral portion disposed coaxially with a gap from the annular peripheral portion; and a cylindrical body protruding coaxially from the flange toward the other space and inserted into the through hole at the assembly completion position. The grommet body is a molded product integrally formed by an annular water stop member and an annular support member. The water stop member is made of a synthetic resin material softer than the base member and capable of elastic deformation, and is in close contact coaxially with the outer peripheral portion of the flange and in close contact coaxially with the peripheral portion at the assembly completion position of the grommet body and the base member. The support member is made of a synthetic resin material harder than the water stop member. A plurality of engaging mechanisms are provided around the cylinder axis of the base member between the base member and the support member. The engaging mechanism engages a first engaging portion provided on the base member with a second engaging portion provided on the support member and holds the base member and the grommet body at the assembly completion position. One of the first engaging portion and the second engaging portion is formed in a cavity shape opening in an orthogonal direction perpendicular to the cylinder axis, and the other of the first engaging portion and the second engaging portion is formed in a protrusion shape inserted into the cavity shape from the opening in the orthogonal direction.

[0011] Advantages of the Invention

[0012] In the grommet of the present invention, an engaging mechanism is provided between the base member and the support member each made of a hard resin, and the holding force between the base member and the grommet body can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a perspective view of the grommet of the embodiment before being installed on an insertion object.

[0014] Figure 2 FIG. is a perspective view of the grommet of the embodiment observed from another angle.

[0015] Figure 3 FIG. is a top view of the grommet of the embodiment observed from the side of the cylindrical body.

[0016] Figure 4 is Figure 3 a cross-sectional view taken along line X1-X1 of

[0017] Figure 5 This is a diagram showing the cross-section of the X2-X2 line of Figure 3 together with the object to be inserted before installation. Figure 3 This is a diagram showing the cross-section of the X2-X2 line of Figure 3 together with the object to be inserted before installation.

[0018] Figure 6 This is an exploded perspective view showing the grommet of the embodiment.

[0019] Figure 7 This is an exploded perspective view of the grommet of the embodiment observed from another angle.

[0020] Figure 8 This is an exploded perspective view showing the grommet of the embodiment separated into two assembled base parts and the grommet body.

[0021] Figure 9 This is an exploded perspective view of the base part and the waterproof part of the embodiment.

[0022] Figure 10 This is an exploded perspective view of the grommet body of the embodiment.

[0023] Figure 11 This is a partial cross-sectional view showing a part of the molding die of the grommet body of the embodiment, showing the part where the second engaging portion does not exist.

[0024] Figure 12 This is a partial cross-sectional view showing a part of the molding die of the grommet body of the embodiment, showing the part where the second engaging portion exists.

[0025] Figure 13 This is an exploded perspective view showing the grommet of Modification 1 separated into two assembled base parts and the grommet body.

[0026] Figure 14 This is an exploded perspective view of the grommet of Modification 1 separated into two assembled base parts and the grommet body and observed from different angles.

[0027] Figure 15 This corresponds to Figure 3 A cross-sectional view of the grommet of Modification 1 of the cross-section of the X2-X2 line.

[0028] Figure 16 This is a top view showing the base part of Modification 1.

[0029] Figure 17 This is Figure 16 A Y-Y cross-sectional view.

[0030] Figure 18 This is an exploded perspective view of the grommet body of Modification 1.

[0031] Figure 19It is a perspective view of the first mold and the second mold of the grommet main body showing Modification 1.

[0032] Figure 20 It is a perspective view of the first mold and the second mold of the grommet main body viewed from another angle showing Modification 1.

[0033] Figure 21 It is a partial cross-sectional view showing a part of the molding die of the grommet main body of Modification 1, showing a portion where the second engaging portion does not exist.

[0034] Figure 22 It is a partial cross-sectional view showing a part of the molding die of the grommet main body of Modification 1, showing a portion where the second engaging portion exists.

[0035] Figure 23 It is an exploded perspective view showing the grommet of Modification 2 separated into two assembled base members and the grommet main body.

[0036] Figure 24 It is an exploded perspective view showing the grommet of Modification 2 separated into two assembled base members and the grommet main body and viewed from different angles.

[0037] Figure 25 It is equivalent to Figure 3 A cross-sectional view of the grommet of Modification 2 taken along the line X2-X2.

[0038] Figure 26 It is a top view showing the base member of Modification 2.

[0039] Figure 27 It is an exploded perspective view of the grommet main body of Modification 2.

[0040] Figure 28 It is a partial cross-sectional view showing a part of the molding die of the grommet main body of Modification 2, showing a portion where the second engaging portion does not exist.

[0041] Figure 29 It is a partial cross-sectional view showing a part of the molding die of the grommet main body of Modification 2, showing a portion where the second engaging portion exists.

[0042] Figure 30 It is an exploded perspective view showing the grommet of Modification 3 separated into two assembled base members and the grommet main body.

[0043] Figure 31 It is equivalent to Figure 3 A cross-sectional view of the grommet of Modification 3 taken along the line X2-X2.

[0044] Figure 32 It is a top view showing the base member of Modification 3. Detailed Description

[0045] Hereinafter, embodiments of the grommet of the present invention will be described in detail based on the drawings. In addition, the present invention is not limited to this embodiment.

[0046] [Embodiment]

[0047] Based on Figures 1 to 12 One embodiment of the grommet of the present invention will be described.

[0048] Figures 1 to 8 Reference numeral 1 in the attached drawing indicates the grommet of this embodiment. This grommet 1 protects the conductive wiring material We that is erected from one space S1 through the through hole 502 of the insertion object 501 to the other space S2 from the peripheral portion 503 of the through hole 502 of the insertion object 501, and prevents liquid (such as water) from entering the gap between the annular peripheral portion 503 and the wiring material We ( Figure 1 and Figure 5 ). Therefore, this grommet 1 is installed on the peripheral portion 503 of the through hole 502 of the insertion object 501 on the basis of inserting the wiring material We.

[0049] Here, the wiring material We refers to, for example, an electric wire (an electric wire as a communication line, an electric wire as a power supply line, etc.). In addition, the insertion object 501 is a member for inserting the wiring material We. For example, in the case of a vehicle, it represents a wall body such as a panel of the vehicle body. The wiring material We passes through the through hole 502 of the insertion object 501, and thus runs between one space S1 and the other space S2 separated by the insertion object 501. For example, the wiring material We is responsible for communication between devices in one space S1 and the other space S2, or for supplying power from a power source in the other space S2 to an electrical device in one space S1, etc.

[0050] The peripheral portion 503 of the through hole 502 of the insertion object 501 has an annular flat portion (hereinafter referred to as "annular flat portion") 504 and an annular protrusion (hereinafter referred to as "annular protrusion") 505 that protrudes from the end of the inner peripheral edge (inner peripheral edge portion 504a) of the annular flat portion 504 toward the other space S2 ( Figure 1 and Figure 5 ). The grommet 1 is installed on the peripheral portion 503 on this annular flat portion 504 and annular protrusion 505. For example, the insertion object 501 is formed by stamping, and at this time, the annular flat portion 504 and the through hole 502 are formed. Moreover, in this insertion object 501, an annular protrusion 505 is formed by flanging the periphery of the through hole 502. Here, since the through hole 502 is formed in a circular shape, the annular flat portion 504 and the annular protrusion 505 are each formed in a circular shape.

[0051] The grommet 1 includes a cylindrical base member 10X through which a wiring material We is inserted internally ( Figures 1 to 9 ). The base member 10X may be formed of a single part or assembled from multiple parts. The base member 10X shown here includes two base members (a first base member and a second base member) assembled with each other. These two base members may be parts with different shapes from each other or identical parts with the same shape. In the grommet 1 shown here, these two base members use identical parts (base members 10, 10) with the same shape ( Figures 1 to 9 ).

[0052] The base member 10X has at least a ring-shaped flange 20 and a cylindrical body 30 coaxially, and a wiring material We is inserted through them internally ( Figure 1 and Figure 2 ). The base member 10X shown here also has a tubular body 40 coaxially with the flange 20 and the cylindrical body 30, and a wiring material We is inserted through them internally ( Figure 1 and Figure 2 ). Here, on this coaxial axis, the cylindrical body 30 protrudes from the flange 20 toward one side, and the tubular body 40 protrudes from the flange 20 toward the other side.

[0053] In the base member 10X shown here, as described later, the ring-shaped flange 20, the cylindrical body 30, and the tubular body 40 are formed coaxially by the base members 10, 10 assembled with each other. Therefore, a holding mechanism (hereinafter referred to as the "base holding mechanism") 50 for keeping them assembled with each other is provided between the two base members 10, 10 ( Figure 1 , Figure 2 and Figures 6 to 8 ).

[0054] In addition, the grommet 1 includes a ring-shaped grommet body 60, and the grommet body 60 is assembled coaxially with the base member 10X (the base members 10, 10 assembled with each other) ( Figures 1 to 8 and Figure 10 ). In order to prevent liquid (such as water) from entering from one space S1 to the other space S2 through the through-hole 502, the grommet body 60 is disposed in one space S1 at the assembly completion position of the grommet 1 to the peripheral portion 503 ( Figure 1 and Figure 5 ). In addition, hereinafter, when only referred to as the "assembly completion position", it indicates the assembly completion position of the grommet 1 relative to the peripheral portion 503.

[0055] The base member 10X (the base members 10, 10) is molded using an insulating hard synthetic resin material (hereinafter referred to as "hard resin"). Here, for example, the base member 10X (the base members 10, 10) is molded using a hard resin such as plastic.

[0056] Two base members 10, 10 are assembled by bringing their joint surfaces 10a together ([ Figure 3 , Figure 6 and Figure 7 ). The two base members 10, 10 sandwich the wiring material We in their assembled state, and the wiring material We is in a state of being inserted therethrough. Here, by assembling the two base members 10, 10, an annular flange 20, a cylindrical tubular body 30, and a circular tubular body 40 are formed. Additionally, here, the tubular body 40 in the form of a straight tube is taken as an example. However, the tubular body 40 may be bent after protruding from the flange 20.

[0057] The flange 20 is disposed in one space S1 at the assembly completion position, and the outer peripheral edge portion 20a is disposed coaxially and at a gap with respect to the peripheral edge portion 503 ([ Figure 5 ). Specifically, the flange 20 has the outer peripheral edge portion 20a disposed coaxially and at a gap with respect to the annular flat surface 503a on the side of one space S1 in the peripheral edge portion 503. The annular flat surface 503a is provided on the annular flat plate portion 504. The annular flat surface 503a shown here is the annular flat surface itself on the side of one space S1 in the annular flat plate portion 504. The flange 20 is formed in the shape of an annular plate. For example, the flange 20 is formed in a shape similar to the circular annular flat surface 503a. The flange 20 shown here has its circular outer peripheral edge portion 20a disposed opposite to the annular flat surface 503a, and the wiring material We is inserted through a position inside the circular inner peripheral edge portion 20b ([ Figure 5 ). The outer peripheral edge portion 20a is disposed coaxially and at a gap in the hole axis direction of the through hole 502 with respect to the inner peripheral edge portion 504a side of the annular flat plate portion 504 in the annular flat surface 503a, in one space S1 ([ Figure 5 ).

[0058] The two base members 10, 10 each have a split flange 11 that brings their joint surfaces 10a together to form the flange 20 ([ Figures 1 to 8 ). The split flange 11 shown here is formed by dividing the flange 20 into two halves along the central axis and is formed in a semi-circular arc shape.

[0059] The tubular body 30 projects coaxially from the flange 20 toward the other space S2 and is inserted through the through hole 502 at the assembly completion position ([ Figure 1 and Figure 5). That is, in the cylindrical body 30, the end of the tip protruding from the flange 20 is arranged in the space S2 on the other side. The cylindrical body 30 is formed into a cylindrical shape. For example, the orthogonal cross section of the cylindrical body 30 relative to the hole axis of the through hole 502 is formed into a shape similar to the orthogonal cross section of the annular protrusion 505 relative to the hole axis. The cylindrical body 30 shown here protrudes from the flange 20 at a position closer to the inner peripheral edge 20b than the outer peripheral edge 20a, and the wiring material We ( Figure 5 ).

[0060] The two base members 10, 10 each have a split tube 12 ( Figure 1 , Figure 3 and Figures 4 to 8 ) The split tube 12 shown here is obtained by dividing the cylindrical body 30 into two halves along the central axis, and is formed into a semicircular arc shape.

[0061] The tubular body 40 protrudes from the flange 20 coaxially with the cylindrical body 30 in the opposite direction ( Figure 4 and Figure 5 ). The tubular body 40 is formed into a circular tube shape. For example, the cross section of the tubular body 40 perpendicular to the hole axis of the through hole 502 is formed into a shape similar to the cross section of the annular protrusion 505 perpendicular to the hole axis. The tubular body 40 shown here protrudes from the inner peripheral edge 20b of the flange 20, and the wiring material We ( Figure 5 ).

[0062] The two base members 10, 10 each have a split tube 13 ( Figure 1 , Figure 2 as well as Figures 4 to 8 ) The split tube 13 shown here is a split tube obtained by splitting the tubular body 40 into two halves along the central axis, and is formed in a semicircular arc shape.

[0063] As described above, the main parts (dividing flange 11, dividing cylinder 12, dividing tube 13) of the two base members 10, 10 are high-hardness members that are difficult to elastically deform. Therefore, the two base members 10, 10 may, for example, form a minute gap between their respective joining surfaces 10a due to the surface roughness of their joining surfaces 10a. Therefore, the grommet 1 of the present embodiment has a waterproof member 71 on at least one of the joining surfaces 10a of the two base members 10, 10, and the waterproof member 71 is made of a synthetic resin material (hereinafter referred to as "soft resin") that is softer than the hard resin of the base member 10 and can be elastically deformed, and the waterproof member 71 eliminates the gap between each joining surface 10a ( Figure 6 , Figure 7 as well as Figure 9 ).

[0064] The waterproof member 71 is formed of a synthetic resin material such as an elastomer, for example. Further, the waterproof member 71 is provided, for example, over the joint surfaces 10a of the divided flange 11, the divided cylinder 12, and the divided pipe 13, respectively. In the base member 10 shown here, a groove portion 10b is formed in one of the joint surfaces 10a at two positions from the divided flange 11 to the divided pipe 13, and the waterproof member 71 is fitted into the groove portion 10b( Figure 9 ). The waterproof member 71 projects from the groove portion 10b. For example, the waterproof member 71 is formed by two-color molding with the base member 10, or integrally molded with the base member 10 by insert molding with respect to the base member 10 housed in a mold. Further, the waterproof member 71 may be formed as a member separate from the base member 10 and adhered to the groove portion 10b of the base member 10 with an adhesive or the like. In the base member 10X, by assembling two base members 10, 10, the waterproof member 71 projecting from the groove portion 10b of one joint surface 10a of one base member 10 is brought into close contact with the other joint surface 10a of the other base member 10.

[0065] The base member holding mechanism 50 is a holding mechanism for holding the two base members 10, 10 in a state where their joint surfaces 10a are kept closed. The base member holding mechanism 50 is provided at a plurality of positions between the two base members 10, 10. For example, the base member holding mechanism 50 shown here includes a piece portion 51 projecting from the joint surface 10a of one of the two base members 10, 10 and a claw-shaped first locking portion 52 projecting from the wall surface of the piece portion 51( Figure 6 and Figure 7 ). Further, the base member holding mechanism 50 shown here includes: an insertion port 53 provided in the joint surface 10a of the other of the two base members 10, 10 for inserting the piece portion 51 and the first locking portion 52 of one of them; a flexible portion 54 provided in the other of the two base members 10, 10, which is pushed by the first locking portion 52 inserted from the insertion port 53 and flexes, and the flexure is eliminated when the first locking portion 52 separates when their joint surfaces 10a are closed; and a second locking portion 55 provided in the other of the two base members 10, 10, which is disposed opposite to the first locking portion 52 when their joint surfaces 10a are closed, and holds the two base members 10, 10 in a state where their joint surfaces 10a are closed( Figure 6 and Figure 7 ).

[0066] The two base members 10, 10 shown herein each have a set of piece portions 51 and a first locking portion 52 at one circumferential end of the split cylinder 12, and have a set of insertion openings 53, a flexible portion 54, and a second locking portion 55 at the other circumferential end of the split cylinder 12. In these two base members 10, 10, in a state where their respective joint surfaces 10a are closed, the first locking portion 52 at one end of one split cylinder 12 is locked with the second locking portion 55 at the other end of the other split cylinder 12, and the second locking portion 55 at the other end of one split cylinder 12 is locked with the first locking portion 52 at the other end of the other split cylinder 12. That is, in these two base members 10, 10, a base holding mechanism 50 for connecting and maintaining the connection state of each split cylinder 12 is provided at two places. Further, these two base members 10, 10 each have a set of piece portions 51 and a first locking portion 52 at one circumferential end of the split pipe 13, and have a set of insertion openings 53, a flexible portion 54, and a second locking portion 55 at the other circumferential end of the split pipe 13. In these two base members 10, 10, in a state where their respective joint surfaces 10a are closed, the first locking portion 52 at one end of one split pipe 13 is locked with the second locking portion 55 at the other end of the other split pipe 13, and the second locking portion 55 at the other end of one split pipe 13 is locked with the first locking portion 52 at the other end of the other split pipe 13. That is, in these two base members 10, 10, a base holding mechanism 50 for connecting and maintaining the connection state of each split pipe 13 is provided at two places.

[0067] The grommet body 60 includes: an annular water stop member 60A made of a soft resin (i.e., a synthetic resin material that is softer than the hard resin of the base member 10X (base member 10) and can be elastically deformed); and an annular support member 60B made of a synthetic resin material harder than the soft resin of the water stop member 60A and integrated with the water stop member 60A ( Figures 1 to 8 and Figure 10 ). The water stop member 60A is molded, for example, using a synthetic resin material such as an elastomer that is softer than the hard resins of the base member 10X (base member 10) and the support member 60B and can be elastically deformed. In addition, the support member 60B is made of, for example, the same hard resin as the base member 10X (base member 10) or a hard resin different from the hard resin of the base member 10X (base member 10) and having the same hardness as the hard resin of the base member 10X (base member 10), and is molded using a synthetic resin material such as plastic.

[0068] The grommet main body 60 is formed as a molded product in which the water stop member 60A and the support member 60B are integrally molded. In the grommet main body 60, the water stop member 60A and the support member 60B are integrated. For example, the water stop member 60A is formed by two-color molding with the support member 60B in a mold, or insert molding is performed with respect to the support member 60B housed in the mold, so as to be integrally molded with respect to the support member 60B.

[0069] The water stop member 60A has an annular main body 61, and the main body 61 is disposed coaxially and at a gap with respect to the outer peripheral edge portion 20a of the flange 20 and at a gap with respect to the peripheral portion 503 at the assembly completion position with respect to the base member 10X (the base members 10, 10 assembled with each other). Figure 1 , Figure 2 , Figures 4 to 8 and Figure 10 ). The main body 61 is formed in a circular plate shape. In addition, hereinafter, when only "assembly completion position" is mentioned, it indicates the assembly completion position of the base member 10X (the base members 10, 10 assembled with each other) and the grommet main body 60.

[0070] The water stop member 60A is in close contact coaxially with the outer peripheral edge portion 20a of the flange 20 at the assembly completion position, and is in close contact coaxially with the peripheral portion 503 at the assembly completion position. The water stop member 60A has: an annular first lip portion 62 that projects coaxially from the main body 61 and elastically deforms at the assembly completion position to closely contact the outer peripheral edge portion 20a of the flange 20 over the entire circumference; and an annular second lip portion 63 that projects coaxially from the main body 61 and elastically deforms at the assembly completion position to closely contact the peripheral portion 503 over the entire circumference. Figures 1 to 8 and Figure 10 ).

[0071] The main body 61 is disposed coaxially and at a gap with respect to the annular wall surface 20c on the side of the peripheral portion 503 of the flange 20 at the assembly completion position. Figure 4 and Figure 5 ). And the first lip portion 62 elastically deforms at the assembly completion position and closely contacts the wall surface 20c over the entire circumference coaxially.

[0072] In addition, the main body 61 is disposed coaxially and at a gap with respect to the annular plane 503a of the peripheral portion 503 at the assembly completion position. And the second lip portion 63 elastically deforms with respect to the annular plane 503a and closely contacts over the entire circumference coaxially. The water stop member 60A has an outer peripheral lip portion 63A coaxial with the main body 61 provided on the outer peripheral edge portion 61a side of the main body 61 and an inner peripheral lip portion 63B coaxial with the main body 61 provided on the inner peripheral edge portion 61b side of the main body 61 as the second lip portion 63.Figure 1 , Figures 3 to 6 and Figure 8 ).

[0073] In the water stop member 60A, the main body 61 and the first lip portion 62 are formed by the first die 601, and the second lip portion 63 (outer peripheral lip portion 63A, inner peripheral lip portion 63B) is formed by the second die 602 ( Figure 11 ). After the water stop member 60A is molded, the first die 601 is withdrawn in the withdrawal direction M1 on one side in the axial direction toward the main body 61. In addition, after the water stop member 60A is molded, the second die 602 is withdrawn in the withdrawal direction M2 on the other side in the axial direction toward the main body 61.

[0074] The first lip portion 62 is formed in an annular shape with an outer wall surface whose cross section orthogonal to the circumferential direction bulges from the main body 61 toward the withdrawal direction M1 of the first die 601 and is circular arc-shaped. Thus, in the water stop member 60A, when the first die 601 is withdrawn in the withdrawal direction M1, the load applied from the first die 601 can be reduced.

[0075] The outer peripheral lip portion 63A protrudes in such a manner that it moves away from the axis (hole axis of the through hole 502) of the main body 61 as it moves away from the main body 61 in the withdrawal direction M2 of the second die 602. And, the inner wall surface 63a in the radial direction of the outer peripheral lip portion 63A has two annular sub-lip portions 63b protruding coaxially from the wall surface 63a in the withdrawal direction M2 of the second die 602 ( Figure 11 ). The outer peripheral lip portion 63A is flexurally deformed from the root portion on the main body 61 side at the assembled position, so that the two sub-lip portions 63b are in close contact with the annular flat surface 503a of the peripheral edge portion 503. In addition, the outer wall surface 63c in the radial direction of the outer peripheral lip portion 63A is formed by at least two third dies 603 withdrawn in the withdrawal direction M3 toward the outside in the radial direction thereof. Thus, in the water stop member 60A, when the third die 603 is withdrawn in the withdrawal direction M3, the load applied from the third die 603 can be reduced.

[0076] In addition, the inner peripheral lip portion 63B has: an inner peripheral surface 63d that is inclined in such a manner that it moves away from the axis (hole axis of the through hole 502) of the main body 61 as it moves away from the main body 61 in the withdrawal direction M2 of the second die 602; and an outer peripheral surface 63e that is parallel to the withdrawal direction M2 of the second die 602 ( Figure 11 ).

[0077] In the water stop member 60A, due to the shape of the second lip portion 63 (outer peripheral lip portion 63A, inner peripheral lip portion 63B), when the second die 602 is withdrawn in the withdrawal direction M2, the load applied from the second die 602 can be reduced.

[0078] The support member 60B has an annular portion (hereinafter referred to as "first annular portion") 65a that is coaxially disposed with a gap relative to the outer peripheral edge portion 20a of the flange 20 at the assembled position. Figure 4 and Figure 5 FIG. 110). The first annular portion 65a is also coaxially disposed with a gap relative to the peripheral edge portion 503 at the assembled position. The first annular portion 65a shown here is coaxially disposed with a gap relative to the wall surface 20c of the flange 20 at the assembled position, and is coaxially disposed with a gap relative to the annular plane 503a of the peripheral edge portion 503 at the assembled position. The first annular portion 65a is formed in a plate shape of a ring having the same outer diameter as the outer diameter of the flange 20.

[0079] In the grommet body 60, the first annular portion 65a of the support member 60B is integrated with the main body 61 of the water stop member 60A. The main body 61 shown here integrates the first annular portion 65a coaxially in such a form that the first annular portion 65a is embedded in an annular groove having the inner peripheral surface 61c side of the main body 61 as the groove bottom and the flange 20 side and the peripheral edge portion 503 side as the groove side walls respectively. Figure 5 )

[0080] In addition, the support member 60B has an annular portion (hereinafter referred to as "second annular portion") 65b that projects coaxially from the outer peripheral edge portion of the first annular portion 65a toward the outer peripheral edge portion 20a of the flange 20. Figure 1 and Figure 2 and Figures 4 to 8 and Figure 10 ). Moreover, the outer peripheral edge portion 20a of the flange 20 has an annular fitting portion 20d for coaxially fitting the second annular portion 65b. Figures 4 to 6 and Figure 8 ). The fitting portion 20d has a first wall surface 20d that is disposed opposite to the inner peripheral surface of the second annular portion 65b 1 and a second wall surface 20d that is disposed opposite to the annular end surface on the protruding direction side of the second annular portion 65b 2 ( Figure 4 and Figure 5 ).

[0081] Here, in the support member 60B, the first lip portion 62 is disposed in the disc-shaped space surrounded by the first annular portion 65a and the second annular portion 65b. Therefore, the flange 20 has a function as a lid that closes the disc-shaped space of the support member 60B at the assembled position. And in the grommet body 60, as shown before, the outer diameter of the flange 20 is the same as the outer diameter of the first annular portion 65a, and it is difficult for water to splash onto the second wall surface 20d of the flange 20. 2Therefore, in the grommet body 60, water can be prevented from entering the disc-shaped space of the support member 60B from the gap, and even if water enters the disc-shaped space of the support member 60B from the gap, the first lip 62 can stop the water.

[0082] Between the base member 10X (the base members 10, 10 assembled with each other) and the support member 60B, a first engaging portion 81 provided on the base member 10X (the base members 10, 10 assembled with each other) is engaged with a second engaging portion 82 provided on the support member 60B, and an engaging mechanism 80 for maintaining the base member 10X (the base members 10, 10 assembled with each other) and the grommet body 60 in the assembled position is provided with a plurality of ( Figure 1 , Figure 3 , Figure 4 , Figures 6 to 8 and Figure 10 ). One of the first engaging portion 81 and the second engaging portion is formed into a cavity shape that opens in a direction perpendicular to the cylindrical axis of the base member 10X, and the other of the first engaging portion 81 and the second engaging portion is formed into a protrusion shape that is inserted into the cavity shape from the opening in a direction perpendicular to the cylindrical axis of the base member 10X. Here, two engaging mechanisms 80 are provided at equal intervals around the cylindrical axis of the base member 10X, one engaging mechanism 80 is provided on the split cylinder 12 of one base member 10, and the other engaging mechanism 80 is provided on the split cylinder 12 of the other base member 10.

[0083] The engaging mechanism 80 of the present embodiment forms the first engaging portion 81 of the base member 10X (the base members 10, 10 assembled to each other) into a cavity shape, and forms the second engaging portion 82 of the support member 60B into a protrusion shape. Specifically, in the grommet body 60, the cylindrical body 30 of the base member 10X (the base members 10, 10 assembled to each other), the main body 61 of the water stop member 60A, and the first annular portion 65a of the support member 60B are arranged concentrically, and the inner peripheral surface 61c of the main body 61 and the inner peripheral surface of the first annular portion 65a are arranged opposite to the outer peripheral surface 30a of the cylindrical body 30 with a gap therebetween ( Figure 5 Therefore, the cylindrical body 30 is provided with a first engaging portion 81 ( Figure 4 , Figure 6 as well as Figure 8 ). In addition, the second engaging portion 82 is formed into a protrusion shape that protrudes from the inner peripheral surface of the first annular portion 65a and penetrates the inner peripheral surface 61c of the main body 61 ( Figure 4 , Figures 6 to 8 and Figure 10)。Here, the first engaging portion 81 is formed in a cavity shape of a through-hole having a rectangular opening, and the second engaging portion 82 is formed in a claw-shaped protrusion shape.

[0084] In this engaging mechanism 80, by assembling the base member 10X (the base members 10, 10 assembled with each other) and the grommet main body 60, the second engaging portion 82 slides on the outer peripheral surface 30a of the cylindrical body 30. When the base member 10X (the base members 10, 10 assembled with each other) and the grommet main body 60 reach the assembled position, the second engaging portion 82 is inserted into the first engaging portion 81 from the opening. Thus, in the grommet 1, the base member 10X (the base members 10, 10 assembled with each other) and the grommet main body 60 are held in the assembled position.

[0085] The grommet 1 configured in this way is provided with a holding mechanism 90. This holding mechanism 90 holds the base member 10X (the base members 10, 10 assembled with each other) and the grommet main body 60 on the peripheral portion 503 of the through-hole 502 of the insertion object 501 ( Figure 1 , Figure 3 and Figures 5 to 8 ). The holding mechanism 90 shown here utilizes the elastic force generated by the elastic deformation of the second lip portion 63 (the outer peripheral lip portion 63A and the inner peripheral lip portion 63B) of the water stop member 60A, and clamps the peripheral portion 503 by the second lip portion 63 (the outer peripheral lip portion 63A and the inner peripheral lip portion 63B) and the following engaging portion 91 provided on the base member 10X (the base member 10), thereby holding the grommet 1 on the peripheral portion 503.

[0086] The base member 10X has an engaging portion 91. This engaging portion 91 protrudes from the outer peripheral surface 30a of the cylindrical body 30 in the other space S2 at the assembled position, and contacts the peripheral portion 503 from the side of the other space S2 in the other space S2 at the assembled position ( Figure 1 and Figures 5 to 8 ). This engaging portion 91 engages a part of the circumferential direction of the peripheral portion 503. Therefore, the base member 10X has a plurality of such engaging portions 91 in the circumferential direction of the cylindrical body 30. However, in the cylindrical body 30, the engaging portions 91 are arranged offset in the circumferential direction with respect to the first engaging portion 81.

[0087] In addition, the base member 10X has a cantilevered engaging piece portion 92 for each engaging portion 91. This engaging piece portion 92 is provided with an engaging portion 91 at the free end in the other space S2 at the assembled position ( Figure 1 , Figure 3 and Figures 5 to 8)。The locking piece portion 92 has, in the space S2 on the other side of the assembled position, the end of the head protruding from the fixed end on the outer peripheral surface 30a side of the cylindrical body 30 toward the space S1 side as a free end, and the free end side thereof protrudes from the outer peripheral surface 30a of the cylindrical body 30 (initial shape). Further, the locking piece portion 92 is formed to have flexibility capable of flexurally deforming to change the amount of protrusion of its free end side from the outer peripheral surface 30a. The locking piece portion 92 moves in the cutout portion 30b formed by cutting a part of the cylindrical body 30 through this flexural deformation ( Figure 1 , Figure 3 and Figures 5 to 8 ). A plurality of sets of combinations of the locking portion 91, the locking piece portion 92, and the cutout portion 30b are provided at equal intervals in the circumferential direction with respect to the cylindrical body 30. In the cylindrical body 30 shown here, four sets of combinations of the locking portion 91, the locking piece portion 92, and the cutout portion 30b are provided at equal intervals in the circumferential direction. Here, two sets of combinations of the locking portion 91, the locking piece portion 92, and the cutout portion 30b are provided in each of the divided cylinders 12 of each base member 10.

[0088] When the cylindrical body 30 is inserted into the through-hole 502 from the space S1, the locking piece portion 92 is forced by the annular protrusion portion 505 of the peripheral edge portion 503 to flexurally deform from the initial shape toward the cutout portion 30b side, and advances to the end (hereinafter referred to as "locking end portion") 505a of the annular protrusion portion 505 after leaving the position of the annular protrusion portion 505 ( Figure 1 and Figure 5 ). The head of the locking piece portion 92 starts to return to the initial shape due to the disappearance of the force received from the annular protrusion portion 505. Therefore, the locking piece portion 92 is arranged together with the locking portion 91 at the head of the locking end portion 505a of the annular protrusion portion 505. On the other hand, the second lip portion 63 (outer peripheral lip portion 63A, inner peripheral lip portion 63B) of the water stop member 60A abuts against the annular flat surface 503a side of the peripheral edge portion 503 and flexurally deforms when a series of operations occur between the locking portion 91 and the locking piece portion 92. Therefore, when the force (so-called insertion force) for inserting into the through-hole 502 is released, the grommet 1 moves back toward the space S1 side due to the elastic force generated by the elastic deformation of the second lip portion 63 (outer peripheral lip portion 63A, inner peripheral lip portion 63B). Along with this, the locking portion 91 comes into contact with the locking end portion 505a of the annular protrusion portion 505 and is locked by the locking end portion 505a ( Figure 5 ). That is, the annular protrusion portion 505 locks the locking portion 91 using the end of the head protruding from the annular flat plate portion 504 (locking end portion 505a). In each part in the circumferential direction of the annular locking end portion 505a, the locking portion 91 is locked. Therefore, the peripheral edge portion 503 is clamped by the second lip portion 63 (outer peripheral lip portion 63A, inner peripheral lip portion 63B) of the water stop member 60A and the respective locking portions 91 of the base members 10X (base members 10, 10).

[0089] The grommet 1 of the present embodiment shown above is provided with an engaging mechanism 80 between a base member 10X (mutually assembled base members 10, 10) made of a hard resin and a support member 60B, and can ensure the holding force between the base member 10X (mutually assembled base members 10, 10) and the grommet main body 60. Further, in the grommet main body 60 of the present embodiment, the first annular portion 65a is integrally formed coaxially in a ring-shaped groove of the main body 61 having the inner peripheral surface 61c side as the groove bottom, and a second engaging portion 82 is provided as a protrusion shape protruding from the inner peripheral surface of the first annular portion 65a and penetrating the inner peripheral surface 61c of the main body 61. Therefore, here, by forming the first mold 601 and the second mold 602 in a manner that avoids the second engaging portion 82, the first mold 601 can be pulled out in the pulling-out direction M1 while reducing the load applied to the water stop member 60A from the first mold 601, and the second mold 602 can be pulled out in the pulling-out direction M2 while reducing the load applied to the water stop member 60A from the second mold 602 ( Figure 12 ). Therefore, in the grommet 1 of the present embodiment, a grommet main body 60 capable of suppressing deterioration of the quality of the water stop member 60A can be provided.

[0090] [Modification Example 1]

[0091] The grommet 2 of this modification includes a base member 110X (mutually assembled base members 110, 110) and a grommet main body 160 ( Figures 13 to 15 ). Further, this grommet 2 is provided with an engaging mechanism 180 between the base member 110X (mutually assembled base members 110, 110) and the grommet main body 160, and the engaging mechanism 180 engages a first engaging portion 181 provided on the base member 110X (mutually assembled base members 110, 110) with a second engaging portion 182 provided on the grommet main body 160, and holds the base member 110X (mutually assembled base members 110, 110) and the grommet main body 160 at the assembled position ( Figures 13 to 15 ).

[0092] The base member 110X (mutually assembled base members 110, 110) is a member obtained by making the following change to the base member 10X (mutually assembled base members 10, 10) in the above embodiment. In addition, the grommet main body 160 refers to a structure obtained by making the following change to the grommet main body 60 in the above embodiment. Therefore, parts denoted by the same reference numerals as those in the embodiment also represent the same components, parts, etc. in the description of this modification.

[0093] The base member 110X of this modification is equivalent to changing the flange 20 to a flange 120 in the base member 10X of the embodimentFigures 13 to 17 )。The flange 120 is the same as the flange 20 of the embodiment, and the outer peripheral edge portion 120a is disposed coaxially and at a gap with respect to the peripheral edge portion 503, and the wiring material We is inserted inside the inner peripheral edge portion 120b. However, the flange 120 has an annular first flange portion 121, which corresponds to the flange 20 of the embodiment, and the outer peripheral edge portion 121a is disposed coaxially and at a gap with respect to the peripheral edge portion 503( Figures 13 to 17 ). And the flange 120 has an annular second flange portion 122 disposed coaxially and at a gap with respect to the outer peripheral edge portion 121a between the outer peripheral edge portion 121a of the first flange portion 121 and the peripheral edge portion 503 and connecting the inner peripheral edge portion to the outer peripheral surface 30a of the cylindrical body 30( Figures 13 to 16 ).

[0094] In this flange 120, the outer peripheral edge portion 120a is formed by the outer peripheral edge portion 121a of the first flange portion 121 and the second flange portion 122, and the inner peripheral edge portion of the first flange portion 121 itself becomes the inner peripheral edge portion 120b. Moreover, in this flange 120, an annular gap in a cavity shape is formed between the first flange portion 121 and the second flange portion 122, and the annular gap opens outward in a direction orthogonal to the cylindrical axis of the base member 110X. In this modified example, the annular gap provided with such an opening is used as the first engaging portion 181 of the engaging mechanism 180. That is, the first engaging portion 181 having such an opening is formed in the outer peripheral edge portion 120a of the flange 120.

[0095] Here, the flange 120 has a plurality of connecting portions 123 connecting them in the annular gap between the first flange portion 121 and the second flange portion 122( Figure 13 , Figure 14 , Figure 16 and Figure 17 ). The connecting portion 123 is formed in a rib shape extending from the outer peripheral surface 30a of the cylindrical body 30 to the position of the outer peripheral surface of the outer peripheral edge portion 121a of the first flange portion 121 in a direction orthogonal to the cylindrical axis of the base member 110X, and a plurality of them are arranged at intervals around the cylindrical axis. Therefore, a plurality of first engaging portions 181 separated by the respective connecting portions 123 are formed in the outer peripheral edge portion 120a of the flange 120.

[0096] The first flange portion 121 shown here is formed in a plate shape of a circular ring similar to the flange 20 of the embodiment. The second flange portion 122 shown here is formed in a plate shape of a circular ring whose outer diameter is smaller than the outer diameter of the outer peripheral edge portion 121a of the first flange portion 121. In this flange 120, four rib-shaped connecting portions 123 are provided at equal intervals around the cylindrical axis of the base member 110X. Therefore, four first engaging portions 181 are formed at equal intervals around the cylindrical axis on the outer peripheral edge portion 120a of this flange 120.

[0097] The two base members 110, 110 each have: a first split flange 111A that closes the joint surfaces 10a of each other to form the first flange portion 121; and a second split flange 111B that closes the joint surfaces 10a of each other to form the second flange portion 122 ( Figures 13 to 15 ). The first split flange 111A and the second split flange 111B shown here each divide the first flange portion 121 and the second flange portion 122 in half along the central axis and are formed in a semi-circular arc shape.

[0098] The grommet body 160 includes: an annular water stop member 160A made of a soft resin; and an annular support member 160B made of a synthetic resin material harder than the soft resin of the water stop member 160A and integrated with the water stop member 160A ( Figures 13 to 15 and Figure 18 ). Here, the water stop member 160A and the support member 160B are formed in a circular ring shape in the same manner as in the embodiment.

[0099] The water stop member 160A is equivalent to the member in which the main body 61 is changed to the main body 161 in the water stop member 60A of the embodiment ( Figures 13 to 15 and Figure 18 ). This main body 161 is equivalent to a structure in which the annular groove for the first annular portion 65a formed when integrally molding with the support member 60B in the main body 61 and the through hole for the second engaging portion 82 are filled.

[0100] The support member 160B has an annular portion 165 that is integrated with the annular joint portion 161a in the outer peripheral edge portion 161a of the main body 161 1 and projects coaxially from this joint portion 161a 1 toward the outer peripheral edge portion 120a of the flange 120 ( Figures 13 to 15 and Figure 18)。The annular portion 165 projects beyond the second flange portion 122 to reach the outer peripheral edge portion 121a of the first flange portion 121, blocking the annular gap between the first flange portion 121 and the second flange portion 122 (i.e., the first engaging portion 181 of the engaging mechanism 180). Therefore, the inner peripheral surface of the annular portion 165 is disposed opposite to the opening of the first engaging portion 181 at the assembled position. Thus, the second engaging portion 182 of the engaging mechanism 180 is formed as a claw-shaped projection protruding from the inner peripheral surface of the annular portion 165. Second engaging portions 182 are provided on the inner peripheral surface of the annular portion 165 at intervals around its axis for each first engaging portion 181. Here, four second engaging portions 182 are formed at equal intervals around its axis.

[0101] In the engaging mechanism 180 of this modification, the base member 110X (the base members 110, 110 assembled with each other) and the grommet main body 160 are assembled. When they reach the assembled position, the second engaging portion 182 is inserted into the first engaging portion 181 from the opening. The second engaging portion 182 is caught by the second flange portion 122 through the first engaging portion 181. Thus, in the grommet 2, the base member 110X (the base members 110, 110 assembled with each other) and the grommet main body 160 are held at the assembled position.

[0102] Here, in the support member 160B, the first lip portion 62 is disposed in the disc-shaped space surrounded by the annular portion 165. Therefore, the flange 120 functions as a lid that blocks the disc-shaped space of the support member 160B at the assembled position. And in this grommet main body 160, the outer diameter of the outer peripheral edge portion 121a of the first flange portion 121 in the flange 120 is the same as the outer diameter of the annular portion 165, and water is difficult to splash into the gap between the outer peripheral edge portion 121a of the first flange portion 121 and the annular portion 165. Therefore, in this grommet main body 160, it is possible to prevent water from entering the disc-shaped space of the support member 160B from this gap, and even if water enters the disc-shaped space of the support member 160B from this gap, the first lip portion 62 can block the water.

[0103] In the grommet main body 160, the main body 161 of the water stop member 160A and the first lip portion 62 are formed by the first die 611 and the second die 612, and the second lip portion 63 (outer peripheral lip portion 63A, inner peripheral lip portion 63B) of the water stop member 160A is formed by the third die 613 and the fourth die 614 ( Figures 19 to 22 )。In addition, in this grommet main body 160, the support member 160B is formed by the first die 611 and the second die 612 ( Figures 19 to 22). After the water stop component 160A and the support component 160B are formed, the first mold 611 is pulled out in a pull-out direction M1 on one side of the axial direction of the main body 161. In addition, after the water stop component 160A and the support component 160B are formed, the second mold 612 and the third mold 613 are pulled out in pull-out directions M2 and M3 on the other side of the axial direction of the main body 161. The fourth mold 614 is equivalent to the third mold 603 shown in the embodiment, and at least two are provided, and are pulled out in a pull-out direction M4 toward the outside in the radial direction.

[0104] The first mold 611 and the second mold 612 are divided into a first area where the claw-shaped second engaging portion 182 is not present and a second area where the claw-shaped second engaging portion 182 is present in the circumferential direction, forming the main body 161 and the first lip 62 of the water stop member 160A and the supporting member 160B. However, the inner peripheral surface 161c of the inner peripheral edge portion 161b of the main body 161 is formed by the outer peripheral surface of the circular plate portion 612a of the second mold 612 ( Figure 19 , Figure 21 and Figure 22 ).

[0105] In the first region occupying most of the main body 161, the first lip 62 and the support member 160B, the first lip 62 side of the main body 161 and the first lip 62 are formed by the first circular plate portion 611a of the first mold 611 ( Figure 19 and Figure 21 ). In addition, the annular portion 165 of the support member 160B in the first region is formed by the first circular plate portion 611a and the second circular plate portion 611b of the first mold 611 ( Figure 19 and Figure 21 The first circular plate portion 611a is provided with a groove portion 611c ( Figure 20 as well as Figure 21 ).

[0106] In addition, the first lip 62 side of the main body 161 in the second region and the first lip 62 are formed by the protrusion 612b of the second mold 612 ( Figure 19 , Figure 20 as well as Figure 22 The protrusion 612b protrudes from the circular plate portion 612a toward the first mold 611 and protrudes radially outward from the outer circumference of the circular plate portion 612a, and is provided for each second engaging portion 182. A groove portion 612c ( Figure 19 , Figure 20 as well as Figure 22 ).

[0107] The first circular plate portion 611a of the first die 611 is formed with a groove portion 611d (Figure 19 , Figure 20 and Figure 22 ). A wall surface 611e is provided on the first circular plate portion 611a. The wall surface 611e is a wall surface connected to the bottom of the groove portion 611d, forms an inclined surface 182a of the claw-shaped second engaging portion 182, and forms a space portion 610a for forming the second engaging portion 182 between the wall surface 611e and the protrusion portion 612b( Figure 20 and Figure 22 ). Therefore, in the support member 160B in the second region, the inner peripheral surface of the annular portion 165 on the main body 161 side of the second engaging portion 182 is formed by the protrusion portion 612b of the second mold 612, and the remaining portion of the inner peripheral surface of the annular portion 165 is formed by the first circular plate portion 611a of the first mold 611.

[0108] In the water stop member 160A, when the first mold 611 is pulled out in the pulling-out direction M1, the load applied from the first mold 611 can be reduced. In addition, in the water stop member 160A, when the second mold 612 is pulled out in the pulling-out direction M2, there is a concern that the protrusion portion 612b may protrude radially outward from the outer peripheral surface of the circular plate portion 612a. However, the region where the protrusion portion 612b exists is limited to the second region where the second engaging portion 182 exists as much as possible, so that the load applied from the second mold 612 can be reduced. In addition, in the water stop member 160A, when the third mold 613 is pulled out in the pulling-out direction M3, the load applied from the third mold 613 can be reduced. In addition, in the water stop member 160A, when the fourth mold 614 is pulled out in the pulling-out direction M4, the load applied from the fourth mold 614 can also be reduced.

[0109] Thus, similar to the grommet 1 of the embodiment, in the grommet 2 of this modification, an engaging mechanism 180 is provided between the base member 110X (the base members 110 and 110 assembled with each other) made of a hard resin and the support member 160B, and the holding force between the base member 110X (the base members 110 and 110 assembled with each other) and the grommet main body 160 can be ensured. And in the grommet main body 160 of this modification, the first mold 611, the second mold 612, the third mold 613, and the fourth mold 614 can be pulled out in their respective pulling-out directions M1, M2, M3, and M4 in a state where the load applied to the water stop member 160A from the first mold 611, the second mold 612, the third mold 613, and the fourth mold 614 is reduced( Figure 21 and Figure 22 ). Therefore, in the grommet 2 of this modification, the grommet main body 160 capable of suppressing the quality degradation of the water stop member 160A can be provided.

[0110] [Modification 2]

[0111] The grommet 3 of this modification example includes a base member 210X (the base members 210, 210 assembled with each other) and a grommet main body 260 ( Figures 23 to 25 ). And, this grommet 3 has an engaging mechanism 280 between the base member 210X (the base members 210, 210 assembled with each other) and the grommet main body 260. This engaging mechanism 280 engages a first engaging portion 281 provided on the base member 210X (the base members 210, 210 assembled with each other) with a second engaging portion 282 provided on the grommet main body 260, and holds the base member 210X (the base members 210, 210 assembled with each other) and the grommet main body 260 at the assembled position ( Figures 23 to 25 ).

[0112] The base member 210X (the base members 210, 210 assembled with each other) refers to a member obtained by making the following changes to the base member 110X (the base members 110, 110 assembled with each other) in the aforementioned modification example 1. In addition, the grommet main body 260 refers to a structure obtained by making the following changes to the grommet main body 160 in the aforementioned modification example 1. Therefore, the parts denoted by the same reference numerals as in the embodiment and modification example 1 also represent the same members, parts, etc. in the description of this modification example.

[0113] The base member 210X of this modification example has a structure in which the flange 120 in the base member 110X of modification example 1 is changed to a flange 220 ( Figures 23 to 26 ). And, this flange 220 has a structure in which a protruding first engaging portion 281 of the engaging mechanism 280 is provided on the flange 120 in modification example 1. That is, this flange 220 not only has the same first flange portion 121, second flange portion 122, and connecting portion 123 as the flange 120 in modification example 1, but also has a protruding first engaging portion 281. Therefore, in this base member 210X, different from the base member 110X in modification example 1, the annular gap between the first flange portion 121 and the second flange portion 122 is not used for the engaging mechanism 280.

[0114] The first engaging portion 281 is formed in a claw-like protruding shape and is provided on the outer peripheral edge portion 120a of the flange 220 ( Figures 23 to 26 ). Here, the first engaging portion 281 protrudes from the outer peripheral surface of the second flange portion 122 in a direction orthogonal to the cylinder axis of the base member 210X. On the outer peripheral surface of the second flange portion 122, four first engaging portions 281 are provided at equal intervals around its cylinder axis.

[0115] In addition, in this base member 210X, in a direction orthogonal to the cylinder axis of the base member 210X, a rib-shaped connecting portion 123 extends from the outer peripheral surface 30a of the cylindrical body 30 to the position of the outer peripheral surface of the second flange portion 122.

[0116] The grommet body 260 is equivalent to changing the support member 160B to the support member 260B in the grommet body 160 of the first modified example. Figures 23 to 25 and Figure 27 ). Further, the support member 260B is equivalent to the support member 160B in the first modified example, where the protruding second engaging portion 182 is removed from the inner peripheral surface of the annular portion 165, and then the cavity-shaped second engaging portion 282 in the engaging mechanism 280 is provided in the annular portion 165. That is, the grommet body 260 integrates the same water stop member 160A and the support member 260B as those of the grommet body 160 in the first modified example.

[0117] Here, the inner peripheral surface of the annular portion 165 is concentrically opposed to the outer peripheral surface of the second flange portion 122 at the assembled position. Therefore, the second engaging portion 282 is formed as a through-hole-shaped cavity having a rectangular opening on the inner peripheral surface of the annular portion 165 between the annular portion 165 and the main body 161 of the water stop member 160A. The second engaging portion 282 is provided for each first engaging portion 281. Therefore, four second engaging portions 282 are formed at equal intervals in the circumferential direction of the annular portion 165 as shown here.

[0118] In the engaging mechanism 280 of this modified example, the base member 210X (the base members 210, 210 assembled with each other) and the grommet body 260 are assembled. When they reach the assembled position, the first engaging portion 281 is inserted into the second engaging portion 282 from the opening. The first engaging portion 281 is locked to the annular portion 165 of the support member 260B by the second engaging portion 282. Thus, in the grommet 3, the base member 210X (the base members 210, 210 assembled with each other) and the grommet body 260 are held at the assembled position.

[0119] Here, in the support member 260B, the first lip portion 62 is disposed in the disc-shaped space surrounded by the annular portion 165 in the same manner as the support member 160B in the first modified example. Therefore, the flange 220 functions as a lid that closes the disc-shaped space of the support member 260B at the assembled position. And, in the grommet body 260, the outer diameter of the outer peripheral edge portion 121a of the first flange portion 121 in the flange 220 is the same as the outer diameter of the annular portion 165 in the same manner as the grommet body 160 in the first modified example, and water is difficult to splash into the gap between the outer peripheral edge portion 121a of the first flange portion 121 and the annular portion 165. Therefore, in the grommet body 260, it is possible to suppress water from entering the disc-shaped space of the support member 260B from this gap, and even if water enters the disc-shaped space of the support member 260B from this gap, the first lip portion 62 can prevent the water.

[0120] In the grommet body 260, the water stop member 160A and the support member 260B are formed by a first mold 621, a second mold 622, and a third mold 623( Figure 28 and Figure 29 ). After the water stop member 160A and the support member 260B are molded, the first mold 621 is pulled out in a pulling direction M1 toward one axial direction of the main body 161. In addition, after the water stop member 160A and the support member 260B are molded, the second mold 622 is pulled out in a pulling direction M2 toward the other axial direction of the main body 161. The third mold 623 corresponds to the third mold 603 shown in the embodiment, and at least two are provided, and are pulled out in a pulling direction M3 toward the outside in the radial direction.

[0121] Here, the first lip 62 is formed by the first mold 621, and the second lip 63 (outer peripheral lip 63A, inner peripheral lip 63B) is formed by the second mold 622( Figure 28 and Figure 29 ). In addition, the third mold 623 forms the wall surface 63c on the outer side in the radial direction of the outer peripheral lip 63A and forms the cavity-shaped second engaging portion 282, similarly to the third mold 603 of the embodiment( Figure 28 and Figure 29 ).

[0122] In the water stop member 160A, when the first mold 621 is pulled out in the pulling direction M1, the load applied from the first mold 621 can be reduced. In addition, in the water stop member 160A, when the second mold 622 is pulled out in the pulling direction M2, the load applied from the second mold 622 can be reduced. In addition, in the water stop member 160A, when the third mold 623 is pulled out in the pulling direction M3, the load applied from the third mold 623 can also be reduced.

[0123] Thus, similar to the grommet 2 of the first modification, in the grommet 3 of this modification, an engaging mechanism 280 is provided between the base member 210X (the mutually assembled base members 210, 210) each made of a hard resin and the support member 260B, and the holding force between the base member 210X (the mutually assembled base members 210, 210) and the grommet body 260 can be ensured. And in the grommet body 260 of this modification, the first mold 621, the second mold 622, and the third mold 623 can be pulled out in their respective pulling directions M1, M2, M3 in a state where the load applied to the water stop member 160A from the first mold 621, the second mold 622, and the third mold 623 is reduced( Figure 28 and Figure 29 ). Therefore, in the grommet 3 of this modification, a grommet body 260 capable of suppressing the deterioration of the quality of the water stop member 160A can be provided.

[0124] [Modification 3]

[0125] The grommet 4 of this modification includes a base member 310X (base members 310, 310 assembled with each other) and a grommet body 360 ( Figure 30 and Figure 31 ). Further, the grommet 4 has an engaging mechanism 380 between the base member 310X (base members 310, 310 assembled with each other) and the grommet body 360. The engaging mechanism 380 engages a first engaging portion 381 provided on the base member 310X (base members 310, 310 assembled with each other) with a second engaging portion 382 provided on the grommet body 360, and holds the base member 310X (base members 310, 310 assembled with each other) and the grommet body 360 at the assembled position ( Figure 30 and Figure 31 ).

[0126] The base member 310X (base members 310, 310 assembled with each other) is a member obtained by making the following changes to the base member 210X (base members 210, 210 assembled with each other) in the aforementioned modification 2. In addition, the grommet body 360 shown here is configured to be the same as the grommet body 260 in the aforementioned modification 2, and includes a water stop member 160A and a support member 260B. Therefore, the parts denoted by the same reference numerals as those in the embodiment and modifications 1 and 2 also represent the same parts, portions, etc. as those in the embodiment and modifications 1 and 2 in the description of this modification.

[0127] The base member 310X of this modification is equivalent to changing the flange 220 to a flange 320 in the base member 210X of modification 2 ( Figures 30 to 32 ). Further, the flange 320 is equivalent to filling the annular gap between the first flange portion 121 and the second flange portion 122 in the flange 220 of modification 2, and has a shape similar to that of the flange 20 in the embodiment. Therefore, each of the two base members 310, 310 has a split flange 311 that closes the joint surface 10a of each other to form the flange 320 ( Figures 30 to 32 ).

[0128] Similar to the flange 20 in the embodiment, the flange 320 has an annular fitting portion 320d on the outer peripheral edge portion 320a for coaxially fitting the annular portion 165 of the support member 260B ( Figures 30 to 32 ). The fitting portion 320d has a first wall surface 320d facing the inner peripheral surface of the annular portion 165 1 , and a second wall surface 320d facing the annular end surface on the protruding direction side of the annular portion 165 2 ( Figure 30 and Figure 32 ). Further, in the flange 320, on the first wall surface 320d 1The first engaging portion 381 having a protruding shape in the engaging mechanism 380 is provided. Figure 30 And Figure 32 ). The first engaging portion 381 is formed in a claw-like protruding shape. Moreover, on the first wall surface 320d 1 , four first engaging portions 381 are provided at equal intervals around the cylindrical axis of the base member 310X.

[0129] In addition, the second engaging portion 382 of the engaging mechanism 380 is the same as the second engaging portion 282 of the second modification example. Four ( Figure 30 And Figure 31 ) are provided at equal intervals around its axis as a cavity shape of a through-hole in the annular portion 165 of the support member 260B.

[0130] In the engaging mechanism 380 of this modification example, the base member 310X (the base members 310, 310 assembled with each other) and the grommet body 360 are assembled. When they reach the assembled position, the first engaging portion 381 is inserted into the second engaging portion 382 of the grommet body 360 from the opening. The first engaging portion 381 is caught by the second engaging portion 382 and stops at the annular portion 165 of the support member 260B. Thus, in the grommet 4, the base member 310X (the base members 310, 310 assembled with each other) and the grommet body 360 are held in the assembled position.

[0131] Here, in the support member 260B of this modification example, similarly to the support member 260B of the second modification example, the first lip portion 62 is disposed in the disc-shaped space surrounded by the annular portion 165. Therefore, the flange 320 has a function as a lid for blocking the disc-shaped space of the support member 260B in the assembled position. And, in this grommet body 360, in a state where the annular portion 165 is fitted into the fitting portion 320d of the outer peripheral edge portion 320a of the flange 320, similarly to the grommet body 260 of the second modification example, the outer diameter of the outer peripheral edge portion 320a of the flange 320 is the same as the outer diameter of the annular portion 165, and water is difficult to splash into the gap between the second wall surface 320d 2 And the annular portion 165. Therefore, in this grommet body 360, it is possible to suppress water from entering the disc-shaped space of the support member 260B from this gap. Even if water enters the disc-shaped space of the support member 260B from this gap, the first lip portion 62 can prevent the water.

[0132] Similar to the grommet body 260 of Modification 2, the grommet body 360 is formed with a water stop member 160A and a support member 260B by a first mold 621, a second mold 622, and a third mold 623. Therefore, in the water stop member 160A, when the first mold 621 is pulled out in the pulling-out direction M1, the load applied from the first mold 621 can be reduced. Further, in the water stop member 160A, when the second mold 622 is pulled out in the pulling-out direction M2, the load applied from the second mold 622 can be reduced. Further, in the water stop member 160A, when the third mold 623 is pulled out in the pulling-out direction M3, the load applied from the third mold 623 can also be reduced.

[0133] Thus, similar to the grommet 3 of Modification 2, in the grommet 4 of this modification, an engaging mechanism 380 is provided between the base member 310X (the base members 310, 310 that are assembled with each other), which are both made of a hard resin, and the support member 260B, and the holding force between the base member 310X (the base members 310, 310 that are assembled with each other) and the grommet body 360 can be ensured. And in the grommet body 360 of this modification, the first mold 621, the second mold 622, and the third mold 623 can be pulled out in their respective pulling-out directions M1, M2, M3 in a state where the load applied to the water stop member 160A from the first mold 621, the second mold 622, and the third mold 623 is reduced. Therefore, in the grommet 4 of this modification, a grommet body 360 that suppresses the deterioration of the quality of the water stop member 160A can be provided.

[0134] Description of Reference Numerals

[0135] 1, 2, 3, 4 Grommets

[0136] 10X, 110X, 210X, 310X Base Members

[0137] 20, 120, 220, 320 Flanges

[0138] 20a, 120a, 320a Outer Peripheral Edge Portions

[0139] 20d Fitting Portion

[0140] 20d 1 First Wall Surface

[0141] 20d 2 Second Wall Surface

[0142] 30 Cylindrical Body

[0143] 30a Outer Peripheral Surface

[0144] 60, 160, 260, 360 Grommet Bodies

[0145] 60A and 160A water stop components

[0146] 60B, 160B, and 260B support components

[0147] 61 and 161 main bodies

[0148] 61c inner peripheral surface

[0149] 62 first lip

[0150] 63 second lip

[0151] 65a first annular part (annular part)

[0152] 65b second annular part

[0153] 80, 180, 280, and 380 engaging mechanisms

[0154] 81, 181, 281, and 381 first engaging parts

[0155] 82, 182, 282, and 382 second engaging parts

[0156] 161a outer peripheral edge part

[0157] 161a 1 joint part

[0158] 165 annular part

[0159] 501 object to be inserted

[0160] 502 through hole

[0161] 503 peripheral part

[0162] S1 one side space

[0163] S2 the other side space

[0164] We wiring material

Claims

1. A grommet, characterized in that: have: a cylindrical base member made of a hard synthetic resin material and having a conductive wiring material inserted therein so as to pass through a through hole of an object to be inserted from one space toward the other space; and an annular grommet body, the grommet body being coaxially assembled to the base member and arranged in the one space at an assembled position to the peripheral edge of the through hole for inserting the object, The base member has an annular flange, the flange being arranged in the one space at the assembled position, and having an outer peripheral edge portion coaxially arranged to face the annular peripheral edge portion with a gap therebetween; and a cylindrical body, the cylindrical body coaxially protruding from the flange toward the other space and inserted into the through hole at the assembly completion position, The grommet body is a molded product formed integrally by an annular water-stopping component and an annular supporting component, the water-stopping component is made of a synthetic resin material that is softer than the base component and can be elastically deformed, and is coaxially in close contact with the outer peripheral edge portion of the flange at the assembled position of the grommet body and the base component, and is coaxially in close contact with the peripheral edge portion at the assembled position, and the supporting component is made of a synthetic resin material that is harder than the water-stopping component. A plurality of engaging mechanisms are provided around the cylindrical axis of the base member between the base member and the supporting member, and the engaging mechanisms engage a first engaging portion provided on the base member with a second engaging portion provided on the supporting member, and maintain the base member and the grommet body in the assembled position. One of the first engaging portion and the second engaging portion is formed into a cavity shape opening in a direction orthogonal to the cylindrical axis, and the other of the first engaging portion and the second engaging portion is formed into a protrusion shape inserted into the cavity shape from the opening in the orthogonal direction.

2. The grommet according to claim 1, wherein: The water stop component comprises: an annular main body, the main body is coaxially arranged opposite to the outer peripheral edge of the flange with a gap in the assembly completion position, and is coaxially arranged opposite to the peripheral edge with a gap in the assembly completion position; an annular first lip portion, the first lip portion protrudes coaxially from the main body, and is elastically deformed in the assembly completion position to be in close contact with the outer peripheral edge of the flange all around; and an annular second lip portion, the second lip portion coaxially protruding from the main body and elastically deforming in the assembly completion position to be in close contact with the peripheral edge portion over the entire circumference.

3. The grommet according to claim 2, characterized in that The support member includes an annular portion, and the annular portion is disposed coaxially opposite to the outer peripheral edge portion of the flange with a gap therebetween in the assembled position. The main body integrates the annular portion coaxially in the form of being embedded in an annular groove, the groove having the inner peripheral surface side of the main body as the groove bottom and the flange side and the peripheral edge side as the groove side walls, respectively. The first engaging portion is formed on the cylindrical portion, and the first engaging portion has the opening disposed opposite to the inner peripheral surface of the main body. The second engagement portion is formed in a protrusion shape that protrudes from the inner peripheral surface of the annular portion and penetrates from the inner peripheral surface of the body.

4. The grommet according to claim 2, characterized in that The support member includes: a first annular portion, the first annular portion being disposed opposite to the outer peripheral edge portion of the flange coaxially with a gap therebetween at the assembled position; and a second annular portion coaxially protruding from an outer peripheral edge portion of the first annular portion toward the outer peripheral edge portion of the flange, The outer peripheral edge portion of the flange has an annular fitting portion into which the second annular portion is coaxially fitted. The fitting portion includes: a first wall surface, the first wall surface being arranged opposite to the inner peripheral surface of the second annular portion; and a second wall surface, the second wall surface being arranged opposite to the annular end surface on the protruding direction side of the second annular portion, The main body integrates the first annular portion coaxially in the form of being embedded in an annular groove, the groove having the inner peripheral surface side of the main body as the groove bottom and the flange side and the peripheral edge side as the groove side walls, respectively. The first engaging portion is formed on the cylindrical body, and the first engaging portion has the opening disposed opposite to the inner peripheral surface of the main body. The second engagement portion is formed in a protrusion shape that protrudes from the inner peripheral surface of the first annular portion and penetrates from the inner peripheral surface of the body.

5. The grommet according to claim 2, wherein: The first engaging portion having the opening is formed on the outer peripheral edge portion of the flange, The support member has an annular portion which is integrated with an annular joint portion of the outer peripheral edge portion of the body and coaxially protrudes from the joint portion toward the outer peripheral edge portion of the flange. The inner surface of the annular portion is arranged opposite to the opening, The second engagement portion is formed in a protrusion shape protruding from the inner peripheral surface of the annular portion.

6. The grommet according to claim 2, wherein: The support member has an annular portion which is integrated with an annular joint portion of the outer peripheral edge portion of the body and coaxially protrudes from the joint portion toward the outer peripheral edge portion of the flange. The annular portion includes the second engaging portion having a cavity shape and the opening provided on the inner peripheral surface of the annular portion. The outer peripheral edge portion of the flange has the first engaging portion formed in a protrusion shape.

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