Grommet

Abstract

The grommet is provided with a base member (10X) in which a sealing member (71) is provided between joining surfaces (10a) of a plurality of divided base members (10) divided radially around the axis of the insertion passage, the base member having a tubular body (40) formed by combining divided tubes (13) of the plurality of divided base members, the tubular body (40) leading out a wiring material (We) of the internal insertion passage from an opening (40a), and the tubular body (40) being formed by combining the divided tubes (13) of the plurality of divided base members. The tubular body has a bent portion (41) and a straight tube portion (42) provided with an opening, the opening is closed by a waterproof tape (Tp) wound across the outer peripheral surface (40b) of the straight tube portion and the wiring material led out from the opening (40a), and the straight tube portion is provided with a tape position specifying portion (44) at a position where a sealing member is provided between the outer peripheral surface and the inner joining surface. The belt position specifying part (44) specifies the allowable range of the end position of the waterproof belt on the straight pipe part side.

Description

Technical Field

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

[0002] Conventionally, in a wire harness, wiring materials such as electric wires are passed through through-holes provided in an insertion object (e.g., a body panel in a vehicle), so that the wiring materials are routed across a space separated by the insertion object. Therefore, in order to protect the wiring materials from the influence of the periphery of the through-hole and prevent liquid from entering the gap between the through-hole and the wiring materials, a grommet for blocking the gap is installed in the insertion object. For example, the grommet is composed of a base member made of a hard synthetic resin material and an annular water-stop member made of a flexible synthetic resin material such as rubber, and is inserted into the through-hole so that the water-stop member is in close contact with the periphery of the through-hole in the insertion object. The wiring material passes through the inside of the base member and is routed across a space. A tubular body through which the wiring material passes inside is provided in the base member. Therefore, in the grommet, by adopting a two-part structure of the base member into a first base member and a second base member, the operation of arranging the wiring material in the wiring path inside the base member becomes easy. In this grommet, by clamping a sealing member with the joint surface between the first base member and the second base member, the intrusion of liquid from the joint surface is suppressed. For example, a grommet configured in this way is disclosed in Patent Document 1 below.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Laid-Open No. 8-251769 Summary of the Invention

[0006] Technical Problem to be Solved by the Invention

[0007] However, in such a grommet, since the wiring material is led out from the opening of the tubular body, in order to seal the gap between the opening and the wiring material, a waterproof tape is wound around the tubular body and the wiring material before and after the opening. However, in this grommet, when winding the waterproof tape, since the first base member and the second base member have been assembled in such a way that their mating surfaces are brought together, it is difficult to visually confirm the position of the sealing member provided on the mating surface, and it is difficult to judge the end position of the sealing member between the mating surfaces of the tubular body. In this grommet, by covering up to the end position of the sealing member with the waterproof tape, appropriate waterproofness between the mating surfaces can be obtained, but since it is difficult to judge this end position, it is difficult to determine whether the winding of the waterproof tape is appropriate for waterproofness. In addition, in the grommet, for example, based on the bending direction of the tubular body of the base member after being bent in one space, a direction can be given to the wiring direction of the wiring material introduced into this one space from the through hole of the insertion object. However, in this grommet, since the tubular body is bent, the position where the waterproof tape can be wound on the tubular body side is limited to the straight tube portion on the opening side. Moreover, in this grommet, depending on the shape of the tubular body such as the bending position or bending shape and the shape around the tubular body in the base member, the space for performing the waterproof tape winding operation is determined, so the position where the waterproof tape can be wound in this straight tube portion may be further limited. Therefore, the range of the position where the waterproof tape can be wound in this grommet is narrow relative to the axial length of the tubular body, and the end position of the waterproof tape on the tubular body side must be limited according to the end position of the sealing member, and there is room for improvement in ensuring waterproofness.

[0008] Therefore, an object of the present invention is to provide a grommet capable of ensuring waterproofness.

[0009] Technical means for solving the problem

[0010] The grommet of the present invention is characterized in that it includes: a base member having a plurality of divided base members made of a synthetic resin material radially divided around the axis of the insertion passage, and allowing a conductive wiring material erected through a through hole for an insertion object between one space and another space to be inserted into the internal insertion passage formed by closing the opposing joint surfaces of the plurality of divided base members; a ring-shaped grommet body assembled to the base member and disposed in the one space at the installation completion position on the peripheral portion of the through hole of the insertion object; and a sealing member sandwiched between the opposing joint surfaces of the plurality of divided base members and filling the gap between the joint surfaces at the sandwiching position. The base member includes: a ring-shaped flange disposed in the one space at the installation completion position and coaxially disposed with a gap with respect to the ring-shaped plane on the one space side of the ring-shaped peripheral portion; and a tubular body formed by combining the divided tubes of the plurality of divided base members, and allowing the wiring material of the internal insertion passage to be led out to the one space from an opening. The grommet body includes a ring-shaped water stop member made of a synthetic resin material that is softer than the base member and can be elastically deformed, coaxially disposed between the flange and the ring-shaped plane of the peripheral portion at the installation completion position, and closely attached to the ring-shaped plane throughout one circumference. The tubular body has: a bent portion that protrudes from the flange and then bends coaxially, and a straight tube portion provided with the opening, and the opening is blocked by a waterproof tape wound around the outer peripheral surface of the straight tube portion and between the wiring material led out from the opening. In the straight tube portion, at a position on the outer peripheral surface and between the internal joint surfaces where the sealing member is provided, a tape position specifying portion is provided, and the tape position specifying portion specifies the allowable range of the end position of the waterproof tape on the straight tube portion side.

[0011] Advantages of the Invention

[0012] In the grommet according to the present invention, using the tape position specifying portion as a mark, the waterproof tape is wound around the straight tube portion up to the tape position specifying portion, so that the gap between the joint surfaces at the end on the opening side of the straight tube portion can be blocked by the waterproof tape. Therefore, the grommet can ensure the waterproof property of the waterproof tape. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 FIG. is a top view of the grommet of the embodiment as viewed from the side.

[0015] Figure 3It is a perspective view of the grommet of the embodiment observed from other angles.

[0016] Figure 4 It is an exploded perspective view showing the grommet of the embodiment.

[0017] Figure 5 It is an exploded perspective view of the split base member and the sealing member of the embodiment.

[0018] Figure 6 It is a perspective view for explaining the winding of the waterproof tape.

[0019] Figure 7 It is a top view for explaining the winding of the waterproof tape.

[0020] Figure 8 It is a top view for explaining the definition of the first end portion of the tape position specifying portion. Detailed Description of the Invention

[0021] Hereinafter, an embodiment 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.

[0022] [Embodiment]

[0023] Based on Figures 1 to 8 One embodiment of the grommet of the present invention will be described.

[0024] Figures 1 to 4 Reference numeral 1 in the attached drawing represents the grommet of the present embodiment. This grommet 1 protects the conductive wiring material We laid through the through hole 502 for inserting the insertion object 501 between one space S1 and another space S2 from the influence of the peripheral portion 503 of the through hole 502 in the insertion object 501, and prevents liquid (such as water) from infiltrating into the gap between the annular peripheral portion 503 and the wiring material We ( Figure 1 ). 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.

[0025] 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, and in the case of a vehicle, it represents a wall body such as a body panel. The wiring material We is routed between one space S1 and another space S2 separated by the insertion object 501 by being inserted into the through hole 502 of the insertion object 501. For example, the wiring material We is responsible for communication between devices in each of one space S1 and another space S2, or for supplying power from a power source in another space S2 to an electrical device in one space S1, etc.

[0026] The peripheral portion 503 of the through-hole 502 of the object 501 to be inserted has: an annular flat portion (hereinafter referred to as "annular flat portion") 504 and an annular protrusion (hereinafter referred to as "annular protrusion") 505 protruding from the end portion of the inner peripheral edge (inner peripheral edge portion 504a) of the annular flat portion 504 toward another space S2 ( Figure 1 ). The grommet 1 is attached to the annular flat portion 504 and the annular protrusion 505 at the peripheral portion 503. For example, the object 501 to be inserted is formed by press molding, and at this time, the annular flat portion 504 and the through-hole 502 are formed. Further, in the object 501 to be inserted, the annular protrusion 505 is formed by flanging the peripheral edge 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 ring shape.

[0027] The grommet 1 includes a base member 10X through which a wiring material We is inserted into an internal insertion path ( Figures 1 to 8 ). The base member 10X includes a plurality of divided base members radially divided around the axis of the insertion path, and the plurality of divided base members are assembled with each other. In the base member 10X, the opposing joint surfaces of the plurality of divided base members are brought together to form an insertion path inside. The plurality of divided base members may be members having different shapes, or may be identical members having the same shape. In the present embodiment, the base member 10X is composed of two divided base members, a first divided base member and a second divided base member. Here, the two divided base members use identical members having the same shape (divided base members 10, 10) ( Figures 1 to 8 ).

[0028] The base member 10X has an annular flange 20, a cylindrical body 30, and a tubular body 40 on the same axis, and the wiring material We is inserted through them ( Figures 1 to 8 ). Here, on the same 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.

[0029] In the base member 10X shown here, as described later, the annular flange 20, the cylindrical body 30, and the tubular body 40 are formed on the same axis by the assembled divided base members 10, 10. Therefore, a holding mechanism (hereinafter referred to as "base holding mechanism") 50 for keeping each other in the assembled state is provided between two adjacent divided base members 10, 10 around the insertion path ( Figures 1 to 3 ).

[0030] Further, the grommet 1 includes an annular grommet main body 60 assembled with respect to the base member 10X (the assembled divided base members 10, 10) ( Figures 1 to 4 andFigures 6 to 8 )。In order to prevent liquid (such as water) from infiltrating from one space S1 to another space S2 via the through-hole 502, the grommet body 60 is disposed at the installation completion position of the grommet 1 on the peripheral portion 503 in one space S1. In addition, hereinafter, when only referred to as the "installation completion position", it represents the installation completion position of the grommet 1 relative to the peripheral portion 503.

[0031] The base member 10X (divided base members 10, 10) is formed using an insulating rigid synthetic resin material (hereinafter referred to as "rigid resin"). Here, for example, a rigid resin such as plastic is used to form the base member 10X (divided base members 10, 10).

[0032] The two divided base members 10, 10 are assembled by bringing their joint surfaces 10a together ( Figure 4 and Figure 5 ). The two divided base members 10, 10 hold the wiring material We in their assembled state, and are in a state where the wiring material We is inserted into the internal insertion path. Here, by assembling the two divided base members 10, 10, an annular flange 20, a cylindrical tubular body 30, and a circular tubular body 40 are formed.

[0033] The flange 20 is disposed in one space S1 at the installation completion position, and is disposed coaxially and at a gap with respect to the annular flat surface 503a on the one space S1 side of the peripheral portion 503 ( Figure 1 ). 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 one space S1 side of the annular flat plate portion 504. The flange 20 has its annular outer peripheral edge portion (hereinafter referred to as "flange outer peripheral edge portion") 20a side disposed coaxially and at a gap with respect to the annular flat surface 503a in the hole axis direction of the through-hole 502 at the installation completion position. And, the flange 20 allows the wiring material We to be inserted at a position closer to the inside than the annular inner peripheral edge portion (hereinafter referred to as "flange inner peripheral edge portion") 20b.

[0034] The flange 20 is formed in a plate shape. Therefore, an annular wall surface (hereinafter referred to as "flange surface") 20c is provided on the flange outer peripheral edge portion 20a side of the flange 20, which is disposed coaxially and at a gap with respect to the annular flat surface 503a at the installation completion position ( Figure 4 ). Here, the flange 20 is formed in an annular shape.

[0035] The flange 20 is formed by combining the divided flanges 11 of the plurality of divided base members 10 respectively ( Figures 1 to 8)。Here, the mating surfaces 10a of the two divided base members 10, 10 are brought together, and the flange 20 is formed by the respective divided flanges 11. The divided 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.

[0036] The cylindrical body 30 projects coaxially from the flange 20 toward the other space S2 and is inserted into the through-hole 502 at the installation completion position. That is, in this cylindrical body 30, the end in the direction protruding from the flange 20 is disposed in the other space S2. The cylindrical body 30 is formed in a cylindrical shape. The cylindrical body 30 projects from between the flange outer peripheral edge portion 20a and the flange inner peripheral edge portion 20b of the flange 20, and the wiring material We is inserted through its interior ( Figure 4 )。Here, for example, the flange 20 is divided into two parts, the flange outer peripheral edge portion 20a side and the flange inner peripheral edge portion 20b side, in the radial direction thereof, and the cylindrical body 30 projects from the boundary portion between the flange outer peripheral edge portion 20a side and the flange inner peripheral edge portion 20b side.

[0037] The cylindrical body 30 is formed by combining the respective divided cylinders 12 of the plurality of divided base members 10 ( Figures 2 to 8 )。Here, the mating surfaces 10a of the two divided base members 10, 10 are brought together, and the cylindrical body 30 is formed by the respective divided cylinders 12. The divided cylinder 12 shown here is formed by dividing the cylindrical body 30 into two halves along the central axis and is formed in a semi-circular arc shape.

[0038] The tubular body 40 projects coaxially from the flange 20 in the direction opposite to the cylindrical body 30, and leads out the wiring material We in the internal insertion path from the opening 40a ( Figures 1 to 3 and Figures 6 to 8 ) to one space S1. The tubular body 40 is formed in a circular tubular shape. The tubular body 40 shown here projects from the flange inner peripheral edge portion 20b of the flange 20, and the wiring material We is inserted through the internal insertion path thereof ( Figure 1 and Figures 3 to 5 )。

[0039] The tubular body 40 has a bent portion 41 that projects coaxially from the flange 20 and then bends ( Figures 1 to 8 )。The tubular body 40 can have a bent portion 41 provided at one location or can have bent portions 41 provided at multiple locations. In addition, the tubular body 40 has a straight tube portion 42 provided with an opening 40a ( Figures 1 to 8)。The tubular body 40 shown here is bent immediately after protruding coaxially from the flange 20, and an opening 40a is provided in the straight tube portion 42 of the bent portion. That is, the tubular body 40 shown here has: a straight tube portion on the root side (hereinafter referred to as "root side straight tube portion") 43 that protrudes coaxially from the flange 20, a straight tube portion on the end side (hereinafter referred to as "end side straight tube portion") 42 where the opening 40a is provided, and a single bent portion 41 sandwiched between the root side straight tube portion 43 and the end side straight tube portion 42( Figures 1 to 8 )。

[0040] The tubular body 40 is formed by combining the divided tubes 13 of the respective divided base members 10( Figures 1 to 8 )。Here, the joint surfaces 10a of the two divided base members 10, 10 are brought together, and the tubular body 40 is formed by the respective divided tubes 13. The divided tube 13 shown here is a divided tube formed by dividing the tubular body 40 into two halves along the central axis, and is formed in a semi-circular arc shape.

[0041] As described above, the main body portions (divided flanges 11, divided cylinders 12, divided tubes 13) of the divided base member 10 are hard members that are difficult to elastically deform. Therefore, the divided base member 10 may form minute gaps due to the surface roughness of the joint surface 10a and the like between the joint surfaces 10a with the opposing divided base member 10. Therefore, the grommet 1 of the present embodiment includes a sealing member 71 that is clamped by the opposing joint surfaces 10a of the plurality of divided base members 10, and fills the gap between the joint surfaces 10a at the clamping position( Figure 4 and Figure 5 )。

[0042] The sealing member 71 is made of a synthetic resin material (hereinafter referred to as "soft resin") that is softer than the hard resin of the divided base member 10 and can be elastically deformed, and is provided on at least one of the opposing joint surfaces 10a. The sealing member 71 is formed using a synthetic resin material such as an elastomer, for example. Moreover, the sealing member 71 is provided, for example, over the joint surfaces 10a of the divided flange 11, the divided cylinder 12, and the divided tube 13. In the divided base member 10 shown here, groove portions 10b are formed on the two joint surfaces 10a from the divided flange 11 to the divided tube 13, and the sealing member 71 is inserted into each groove portion 10b( Figure 5)。The sealing member 71 protrudes from the groove portion 10b. For example, the sealing member 71 is formed by two-color molding with the divided base member 10, or insert-molded with respect to the divided base member 10 housed in a mold, so as to be integrally formed with the divided base member 10. Additionally, the sealing member 71 may be formed as a member different from the divided base member 10 and adhered to the groove portion 10b of the divided base member 10 with an adhesive or the like. In the base member 10X, by assembling the two divided base members 10, 10, the sealing member 71 protruding from the groove portion 10b of each joint surface 10a of one divided base member 10 is brought into close contact with each joint surface 10a of the other divided base member 10.

[0043] The base holding mechanism 50 is a holding mechanism for holding the two divided base members 10, 10 in a state where their joint surfaces 10a are closed. The base holding mechanism 50 shown here is provided at a plurality of positions between the two divided base members 10, 10. For example, the base holding mechanism 50 shown here includes: a piece portion 51 protruding from the joint surface 10a of one of the two divided base members 10, 10, and a claw-shaped first locking portion 52 protruding from the wall surface of the piece portion 51 ( Figure 4 ). Moreover, the base holding mechanism 50 shown here includes: an insertion port 53 provided in the joint surface 10a of the other of the two divided base members 10, 10 for inserting the piece portion 51 and the first locking portion 52 of one base member 10; and a second locking portion 54 provided in the other of the two divided 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 divided base members 10, 10 in a state where their joint surfaces 10a are closed ( Figure 4 ). The second locking portion 54 has the following flexibility: it is pushed by the first locking portion 52 inserted from the insertion port 53 and flexes, and when their joint surfaces 10a are closed, the first locking portion 52 moves away and the flexing is eliminated.

[0044] The two split base members 10, 10 shown herein each have a set of piece portions 51 and first locking portions 52 at one circumferential end of the split cylinder 12, and a set of insertion openings 53 and second locking portions 54 at the other circumferential end of the split cylinder 12. In the two split base members 10, 10, in a state where their joint surfaces 10a are brought together, the first locking portion 52 at one end of one split cylinder 12 is locked with the second locking portion 54 at the other end of the other split cylinder 12, and the second locking portion 54 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 the two split 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 locations. Further, the two split base members 10, 10 each have a set of piece portions 51 and first locking portions 52 at one circumferential end of the split pipe 13, and a set of insertion openings 53 and second locking portions 54 at the other circumferential end of the split pipe 13. In the two split base members 10, 10, in a state where their joint surfaces 10a are brought together, the first locking portion 52 at one end of one split pipe 13 is locked with the second locking portion 54 at the other end of the other split pipe 13, and the second locking portion 54 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 the two split 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 locations. Here, the base holding mechanisms 50 at these two locations are provided on the root side straight pipe portion 43 of the tubular body 40.

[0045] In the base member 10X (the split base members 10, 10 after being assembled with each other), the wiring material We is led out from the opening 40a of the tubular body 40 to one space S1, and the wiring material We is led out from the opening of the cylindrical body 30 to another space S2. In the grommet 1, the gap between the flange 20 of the base member 10X (the split base members 10, 10 after being assembled with each other) and the annular plane 503a of the peripheral portion 503 is sealed by the grommet body 60 to prevent liquid (such as water) from infiltrating from one space S1 to the other space S2 through the through hole 502. And, in the grommet 1, the opening 40a of the tubular body 40 is sealed with the waterproof tape Tp to prevent liquid (such as water) from infiltrating into the insertion path inside the tubular body 40 ( Figure 2 and Figures 6 to 8 ).

[0046] 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 and elastically deformable than the hard resin of the base member 10X (divided base member 10)); 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 4 and Figures 6 to 8 ). The water stop member 60A is formed, for example, of a synthetic resin material such as an elastomer that is softer and elastically deformable than the hard resins of the base member 10X (divided base member 10) and the support member 60B. Further, the support member 60B is formed of, for example, the same hard resin as the base member 10X (divided base member 10) or a hard resin different from the hard resin of the base member 10X (divided base member 10) and having the same hardness as the hard resin of the base member 10X (divided base member 10), and is formed using a synthetic resin material such as plastic.

[0047] The grommet body 60 is configured as a molded product obtained by integrally molding the water stop member 60A and the support member 60B. In the grommet 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. Alternatively, the water stop member 60A may be formed as a member different from the support member 60B and adhered to the support member 60B using an adhesive or the like.

[0048] The grommet body 60 is assembled to the base member 10X (divided base members 10, 10 after being assembled to each other) via the support member 60B.

[0049] The water stop member 60A is coaxially pressed against the flange 20 at the assembly completion position with the base member 10X (divided base members 10, 10 after being assembled to each other), and is coaxially disposed between the flange 20 and the annular plane 503a of the peripheral portion 503 at the installation completion position, and is pressed against the annular plane 503a over the entire circumference. The water stop member 60A has, for example, an annular lip that elastically deforms at its assembly completion position and is coaxially pressed against the flange surface 20c (not shown) of the flange 20 over the entire circumference. Further, the water stop member 60A has an annular outer peripheral lip 61 and an annular inner peripheral lip 62 that elastically deform at the installation completion position and are coaxially pressed against the annular plane 503a of the peripheral portion 503 over the entire circumference( Figures 1 to 4 ). Further, hereinafter, when only the "assembly completion position" is mentioned, it means the assembly completion position of the base member 10X (divided base members 10, 10 after being assembled to each other) and the grommet body 60.

[0050] The support member 60B is formed as an annular member that is integrated with the outer peripheral edge portion of the water stop member 60A and projects coaxially from the outer peripheral edge portion toward the flange outer peripheral edge portion 20a of the flange 20. Figures 1 to 4 and Figures 6 to 8 ). The support member 60B is formed in a circular ring shape.

[0051] A latching mechanism 80 is provided between the base member 10X (the divided base members 10, 10 after being assembled together) and the support member 60B. The latching mechanism 80 latches the first latching portion 81 provided on the base member 10X (the divided base members 10, 10 after being assembled together) with the second latching portion 82 provided on the support member 60B, and holds the base member 10X (the divided base members 10, 10 after being assembled together) and the grommet body 60 at the assembled position. Figures 1 to 4 ). The first latching portion 81 is formed as a claw-shaped protrusion that projects radially outward from the flange outer peripheral edge portion 20a of the flange 20. In addition, the second latching portion 82 is a through hole formed in the support member 60B, and the first latching portion 81 is inserted and latched to the inner peripheral wall surface of the second latching portion 82 at the assembled position. A plurality of the latching mechanisms 80 are provided around the tube axis of the base member 10X (the divided base members 10, 10 after being assembled together). Here, four of the latching mechanisms 80 are provided at equal intervals around the tube axis of the base member 10X, two of which are provided on the divided flange 11 of one divided base member 10, and the remaining two are provided on the divided flange 11 of the other divided base member 10.

[0052] The waterproof tape Tp is wound around the outer peripheral surface 40b of the tubular body 40 about its axis. Figure 2 and Figures 6 to 8 ). The opening 40a of the tubular body 40 is blocked by the waterproof tape Tp, and the waterproof tape Tp is wound over the outer peripheral surface 40b of the end side straight tube portion 42 and between the wiring material We led out from the opening 40a.

[0053] The wire harness WH of this embodiment includes a plurality of wiring materials We, and the whole or at least a part of the plurality of wiring materials We except for both ends are bundled together by an exterior member such as a corrugated tube or a resin tape. The plurality of wiring materials We shown here are covered by the corrugated tube COT Figures 1 to 4 and Figures 6 to 8 ) inside the tube of the end side straight tube portion 42, and are led out from the opening 40a together with the corrugated tube COT. Therefore, the waterproof tape Tp of this example is wound over the outer peripheral surface 40b of the end side straight tube portion 42 and between the outer peripheral surface COTa of the corrugated tube COT as an exterior member led out from the opening 40a. Figure 2 and Figures 6 to 8 ).

[0054] It should be noted that the straight tube portion 42 on the end side has an annular convex portion 42a which projects annularly over the entire circumference from the inner circumferential surface of the straight tube portion 42 on the end side and is fitted into the annular valley portion COT1 of the corrugated tube COT inside the tube( Figure 4 ). The straight tube portion 42 on the end side has a plurality of annular convex portions 42a spaced apart coaxially, and the corrugated tube COT inside the tube is held by the plurality of convex portions 42a.

[0055] Here, in view of waterproofness, the groove portion 10b of the joint surface 10a of the split tube 13 is formed up to the vicinity of the opening 40a in such a manner as not to penetrate the end surface on the opening 40a side of the split tube 13. Therefore, the sealing member 71 is disposed along the joint surface 10a from the split flange 11 to the split tube 13, but stops at the vicinity of the opening 40a. Therefore, in the tubular body 40, a gap is generated between the joint surfaces 10a at the end on the opening 40a side of the straight tube portion 42 on the end side. Therefore, in the straight tube portion 42 on the end side, the waterproof tape Tp is wound around the position where the sealing member 71 is disposed between the inner joint surfaces 10a. Therefore, in the straight tube portion 42 on the end side, a tape position specifying portion 44 is provided at a position on the outer circumferential surface 40b and between the inner joint surfaces 10a where the sealing member 71 is disposed, and the tape position specifying portion 44 specifies the allowable range of the end position of the waterproof tape Tp on the straight tube portion 42 side( Figures 1 to 8 ). Thus, in the grommet 1 of the present embodiment, by marking the tape position specifying portion 44 and winding the waterproof tape Tp around the tape position specifying portion 44 in the straight tube portion 42 on the end side, the gap between the joint surfaces 10a at the end on the opening 40a side of the straight tube portion 42 on the end side can be blocked by the waterproof tape Tp. Therefore, the grommet 1 of the present embodiment can ensure waterproofness based on the waterproof tape Tp.

[0056] The tape position specifying portion 44 has a first end portion 44a indicating the allowable limit position of the end position of the waterproof tape Tp on the bent portion 41 side, and a second end portion 44b indicating the allowable limit position of the end position of the waterproof tape Tp on the opening 40a side( Figures 1 to 8 ). The tape position specifying portion 44 indicates the allowable range (the allowable range of the end position of the waterproof tape Tp on the straight tube portion 42 side) by the first end portion 44a and the second end portion 44b. The sealing member 71 is disposed between the inner joint surfaces 10a between the first end portion 44a and the second end portion 44b, and is connected from a position closer to the bent portion 41 side than the first end portion 44a to a position closer to the opening 40a side than the second end portion 44b. That is, the second end portion 44b is provided on the bent portion 41 side with respect to the end portion on the opening 40a side of the sealing member 71. Therefore, in the grommet 1 of the present embodiment, by winding the waterproof tape Tp around the tape position specifying portion 44 of the straight tube portion 42 on the end side, the waterproof tape Tp can be wound in a form covering the sealing member 71Figure 2 , Figure 6 and Figure 7 ).

[0057] However, as described above, in the grommet 1, the space where the winding operation of the waterproof tape Tp can be performed is determined according to the shape of the tubular body 40 such as the bending position or bending shape and the peripheral shape of the tubular body 40 in the base member 10X (the divided base members 10, 10 after being assembled with each other). Therefore, the position where the waterproof tape Tp can be wound in the end side straight tube portion 42 is limited. In this example, for example, the flange 20 obstructs the winding operation of the waterproof tape Tp, and the waterproof tape Tp cannot be wound to the end portion on the bending portion 41 side of the end side straight tube portion 42. Therefore, the first end portion 44a is provided at the operation limit position where the winding operation of the waterproof tape Tp can be performed on the bending portion 41 side. In this example, the position closest to the bending portion 41 where the waterproof tape Tp does not collide with the flange 20 when winding the waterproof tape Tp becomes the operation limit position, and the first end portion 44a is provided at this operation limit position ( Figure 8 ). Thus, in the grommet 1, the winding operation of the waterproof tape Tp can be facilitated.

[0058] For example, the first end portion 44a is formed as an annular protrusion that projects circumferentially from the outer peripheral surface 40b of the end side straight tube portion 42. By winding the waterproof tape Tp onto the first end portion 44a, the waterproof tape Tp floats from the outer peripheral surface 40b around the first end portion 44a, and there may be a gap between the waterproof tape Tp and the outer peripheral surface 40b. Therefore, in the grommet 1, by winding the waterproof tape Tp with a position closer to the second end portion 44b than the first end portion 44a as the end portion position, the waterproof tape Tp at this end portion position can be made to closely adhere to the outer peripheral surface 40b, and thus the waterproof property of the waterproof tape Tp can be ensured.

[0059] In addition, for example, the second end portion 44b is formed as an annular groove that recesses the outer peripheral surface 40b of the end side straight tube portion 42 circumferentially. Thus, in the grommet 1, although the waterproof tape Tp is wound starting from above the second end portion 44b, since the waterproof tape Tp can also be made to closely adhere to the outer peripheral surface 40b around the second end portion 44b, the waterproof property of the waterproof tape Tp can be ensured.

[0060] The grommet 1 configured in this way includes a holding mechanism 90 that holds the base member 10X (the divided base members 10, 10 after being assembled with each other) and the grommet main body 60 after being assembled with each other at the peripheral portion 503 of the through hole 502 of the insertion object 501 ( Figure 2 and Figure 3)。The retaining mechanism 90 shown here utilizes the elastic force generated by the elastic deformation of the outer peripheral lip 61 and the inner peripheral lip 62 of the water stop member 60A, and clamps the peripheral portion 503 by the outer peripheral lip 61, the inner peripheral lip 62, and the following engaging portion 91 provided on the base member 10X (base member 10), thereby holding the grommet 1 on the peripheral portion 503.

[0061] The base member 10X has an engaging portion 91 that protrudes from the outer peripheral surface 30a of the cylindrical body 30 in another space S2 at the installation completion position, and contacts the peripheral portion 503 from the side of the other space S2 in the other space S2 at the installation completion position ( Figure 2 and Figure 3 ). The engaging portion 91 engages a part of the peripheral portion 503 in the circumferential direction. Therefore, the base member 10X has a plurality of such engaging portions 91 in the circumferential direction of the cylindrical body 30.

[0062] In addition, in the base member 10X, for each engaging portion 91, there is a cantilever-like engaging piece portion 92, and the engaging piece portion 92 has an engaging portion 91 provided at its free end in another space S2 at the installation completion position ( Figure 2 and Figure 3 ). The engaging piece portion 92 has, as its free end, the end that protrudes from the fixed end on the outer peripheral surface 30a side of the cylindrical body 30 toward the one space S1 side in another space S2 at the installation completion position, and causes the free end side to protrude from the outer peripheral surface 30a of the cylindrical body 30 (initial shape). And the engaging piece portion 92 is formed to be flexible and capable of flexural deformation that changes the amount of protrusion of its free end side from the outer peripheral surface 30a. The engaging piece portion 92 moves in the notch portion 30b formed by cutting a part of the cylindrical body 30 through its flexural deformation ( Figure 2 and Figure 3 ). A combination of the engaging portion 91, the engaging piece portion 92, and the notch portion 30b is provided at equal intervals in the circumferential direction of the cylindrical body 30. On the cylindrical body 30 shown here, three sets of the combination of the engaging portion 91, the engaging piece portion 92, and the notch portion 30b are provided at equal intervals in the circumferential direction.

[0063] When the cylindrical body 30 is inserted into the through-hole 502 from the one space S1, the engaging piece portion 92 is forced by the annular protrusion portion 505 of the peripheral portion 503 to flexurally deform from the initial shape toward the notch portion 30b side, and advances to the end (hereinafter referred to as the "engaging end") 505a of the annular protrusion portion 505 after leaving the position of the annular protrusion portion 505. Figure 1) in front, the initial shape starts to be restored as the force received from the annular protrusion 505 disappears. Therefore, this locking piece portion 92 and the locking portion 91 are arranged together in front of the locking end portion 505a of the annular protrusion 505. On the other hand, in the water stop member 60A, when this series of actions of the locking portion 91 and the locking piece portion 92 occur, the outer peripheral lip 61 and the inner peripheral lip 62 are in contact with the annular plane 503a of the peripheral edge portion 503 and elastically deformed. Therefore, when the force (so-called insertion force) for inserting into the through hole 502 is removed, the grommet 1 moves back toward the one space S1 side due to the elastic force generated by the elastic deformation of the outer peripheral lip 61 and the inner peripheral lip 62. Along with this, the locking portion 91 comes into contact with the locking end portion 505a of the annular protrusion 505 and is locked by this locking end portion 505a. That is, the annular protrusion 505 locks the locking portion 91 using the end (locking end portion 505a) in the protruding direction from the annular flat plate portion 504. In this annular locking end portion 505a, the locking portion 91 is locked for each part in the circumferential direction. Therefore, the peripheral edge portion 503 is clamped by the outer peripheral lip 61 and the inner peripheral lip 62 of the water stop member 60A and the respective locking portions 91 of the base member 10X (divided base members 10, 10).

[0064] Description of Reference Numerals

[0065] 1 Grommet

[0066] 10X Base member

[0067] 10 Divided base member

[0068] 10a Joint surface

[0069] 13 Divided pipe

[0070] 20 Flange

[0071] 40 Tubular body

[0072] 40a Opening

[0073] 40b Outer peripheral surface

[0074] 41 Bending portion

[0075] 42 Straight pipe portion

[0076] 44 Band position specifying portion

[0077] 44a First end portion

[0078] 44b Second end portion

[0079] 60 Grommet body

[0080] 60A Water stop member

[0081] 71 Sealing component

[0082] 501 Object to be inserted

[0083] 502 Through hole

[0084] 503 Peripheral part

[0085] 503a Annular plane

[0086] Tp Waterproof tape

[0087] S1 One space

[0088] S2 Another space

[0089] We Wiring material

Claims

1. A grommet, characterized in that: have: A base member, the base member comprising a plurality of divided base members made of a synthetic resin material and divided radially around an axis of the insertion passage, the base member allowing a conductive wiring material to be inserted through the insertion passage formed inside by closing mutually opposed joint surfaces of the plurality of divided base members, the wiring material being a wiring material that is laid between one space and another space through a through hole that penetrates an object; an annular grommet body, the grommet body being assembled to the base member and arranged in the one space at a mounting completion position to a peripheral edge portion of the through hole of the insertion object; and a sealing member, the sealing member being sandwiched by the mutually opposing joining surfaces of the plurality of divided base members and filling a gap between the joining surfaces at the sandwiched position, The base component comprises: an annular flange, the flange being arranged in the one space at the installation completion position and being arranged coaxially opposite to an annular plane on the one space side of the annular peripheral portion with a gap therebetween; and a tubular body formed by combining the divided tubes of the plurality of divided base members, and allowing the wiring material of the insertion passage inside to be led out from an opening to the one space, The grommet body includes an annular water-stopping member, which is made of a synthetic resin material that is softer than the base member and can be elastically deformed, and is coaxially arranged between the flange and the annular plane of the peripheral portion at the installation completion position, and is closely attached to the annular plane over the entire circumference. The tubular body comprises: a curved portion coaxially protruding from the flange and then bent, and a straight tube portion provided with the opening, the opening being sealed by a waterproof tape, the waterproof tape being wound between the outer peripheral surface of the straight tube portion and the wiring material led out from the opening, The straight tube portion is provided with a tape position specifying portion at a position on the outer peripheral surface and between the joint surfaces where the sealing member is provided inside, the tape position specifying portion specifying an allowable range of the end position of the waterproof tape on the straight tube portion side.

2. The grommet according to claim 1, wherein The belt position designation portion has: a first end portion, the first end portion indicating the allowable limit position of the end position of the waterproof belt on the bending portion side; and a second end portion, the second end portion indicating the allowable limit position of the end position of the waterproof belt on the opening side, and the allowable range is indicated by the first end portion and the second end portion.

3. The grommet according to claim 1, wherein: The tape position designation portion includes: a first end portion indicating an allowable limit position of the end position of the waterproof tape on the curved portion side; and a second end portion indicating an allowable limit position of the end position of the waterproof tape on the opening side, and the allowable range is indicated by the first end portion and the second end portion. The first end portion is an annular protrusion that protrudes circumferentially from the outer peripheral surface of the straight tube portion. The second end portion is an annular groove portion formed by recessing the outer peripheral surface of the straight tube portion in the circumferential direction.

4. The grommet according to claim 2 or 3, wherein: The first end portion is disposed at an operation limit position on the curved portion side where the waterproof tape can be wound. The second end portion is provided at a position closer to the bent portion than an end portion of the sealing member on the opening side.

5. The grommet according to claim 1, 2 or 3, wherein: The plurality of wiring materials are covered by the exterior member in the straight tube portion and are led out from the opening together with the exterior member. The waterproof tape is wound between the outer peripheral surface of the straight tube portion and the outer peripheral surface of the exterior member drawn out from the opening.

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