Grommet inner and grommet

Abstract

To provide a grommet inner which can prevent misalignment of fixed split bodies, and to provide a grommet.SOLUTION: A grommet inner 20 forms a grommet 1, which protects an electric wire WH inserted into an insertion hole P1 provided at a body panel P, with a cover 10 and comprises: multiple split bodies, a first split body 30 and a second split body 40, which are divided in a circumferential direction. The first split body 30 and the second split body 40 are integrally formed by a first insertion split part 31 and a second insertion split part 41 which form an insertion part 21, a first disc split part 32 and a second disc split part 42 which form a disc part 22, and a first inner split part 33 and a second inner split part 43 which form an inner body 23. The first disc split part 32 has a disc protruding part 321 which protrudes toward the second split body 40 located adjacent to the first split body 30 in a state that the first and second split bodies 30, 40 are fixed by a fixing part 27 and contacts with the second disc split part 42.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a grommet inner that constitutes a grommet for protecting an electric wire inserted through a panel, and a grommet equipped with the grommet inner.

Background Art

[0002] For example, when wiring an electric wire so as to penetrate a vehicle body panel in a vehicle or the like, by inserting the electric wire inside a grommet fitted into an insertion hole provided in the vehicle body panel, damage due to interference between the peripheral portion of the insertion hole and the electric wire is prevented.

[0003] As an example of such a grommet, a grommet having a flexible resin cover attached to a vehicle body panel and a grommet inner attached to the cover and inserted into an insertion hole provided in the vehicle body panel is disclosed in Patent Document 1.

[0004] In the grommet of this Patent Document 1, since the grommet inner is composed of split bodies of substantially the same shape that can be split in the circumferential direction, it is said that the grommet inner can be easily assembled to the electric wire by assembling and locking the split bodies to the electric wire. Then, the grommet inner attached to the cover is inserted into the insertion hole, and the vehicle body panel is sandwiched between the grommet inner and the cover, so that the grommet can be fixed to the vehicle body panel and it is said that it is possible to prevent the electric wire from interfering with the peripheral portion of the insertion hole and being damaged.

[0005] However, in the above-described grommet inner that locks and fixes split bodies that are split in the circumferential direction, if the split bodies are locked and fixed in a displaced state, there is a risk that a liquid such as rainwater may enter the grommet.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] In view of the above-mentioned problems, this invention aims to provide a grommet inner and a grommet that can prevent misalignment between fixed divided parts and prevent liquid from entering the inside of the grommet. [Means for solving the problem]

[0008] This invention provides a grommet inner that protects an electric wire inserted through an insertion hole provided in a panel, and comprises a cylindrical insertion portion that is inserted through the insertion hole and has a routing space inside which the electric wire is routed, an annular disc portion that is positioned on one side of the insertion portion and protrudes radially outward from the insertion portion, and a hollow inner body that protrudes toward one side from the disc portion and communicates with the routing space, and is attached to the end of the cover and fixed in the insertion hole, and is circumferential It is composed of multiple divided parts that can be separated in a direction, and is equipped with a fixing part for fixing adjacent divided parts together when assembled, and each divided part is integrally composed of an insertion divided part that constitutes the insertion part, a disc divided part that constitutes the disc part, and an inner divided part that constitutes the inner body, and at least one of the insertion divided part and the disc divided part has a contact projection that protrudes toward the other adjacent divided part when fixed by the fixing part and abuts against the adjacent insertion divided part or the disc divided part The abutment projection is provided on at least one of the adjacent insertion divisions and includes an insertion projection that abuts against the adjacent insertion division in the insertion direction or radial direction through which the electric wire is inserted, and the insertion projection includes a regulating projection that abuts against the other adjacent insertion division in the insertion direction, the insertion division is provided with a pivot that pivotably connects adjacent insertion divisions, the fixing portion is provided on the opposite side of the pivot in the insertion division, the regulating projection is provided on the radially outward side of the side where the pivot is provided, one of the adjacent insertion divisions is provided with an opening recess formed in the circumferential direction, and the insertion projection is provided on the other adjacent insertion division that is inserted into the opening recess The inner body is provided with an insertion projection that abuts the opening recess and the insertion direction, the insertion projection also abuts the radial surface of the opening recess, the inner body has an upper surface on one end, the inner divided portion has a divided upper surface that constitutes the upper surface, and at least one of the adjacent divided upper surfaces has an inner projection that abuts the adjacent divided upper surface in the insertion direction through which the electric wire is inserted, the inner projection has a first inner projection provided on one of the divided upper surfaces and a second inner projection provided on the other divided upper surface adjacent to the one divided upper surface, and the first inner projection and the second inner projection are positioned so as not to interfere with each other when the adjacent divided bodies are fixed together. It is characterized by the following:

[0009] Furthermore, this invention is a grommet comprising the grommet inner described above and the cylindrical cover through which an electric wire is inserted, wherein the grommet inner is attached to the end of the cover.

[0010] The divided body may be divided into two or more parts. Furthermore, the divided body may not only have the same shape, but may also have different shapes. Further, the divided body may be pivotally connected via a pivoting portion such as a hinge, or may be completely separably divided.

[0011] The contact with the corresponding insertion divided portion or the disk divided portion described above refers to contacting at least one surface in the insertion direction and the radial direction of the electric wire in the insertion divided portion or the disk divided portion. Note that the contact convex portion provided on one of the insertion divided portion and the disk divided portion includes the case where it contacts not only one but both of the adjacent insertion divided portion and the disk divided portion.

[0012] The pivot portion includes, for example, cases in which adjacent divided bodies are integrally connected, or cases in which parts provided on adjacent divided bodies are combined to make them pivotable. That is, adjacent divided bodies include cases in which they are integral or separate bodies connected via the pivot portion.

[0013] If there are three or more of the divided bodies, there may be one or more pivot parts. For example, if the divided bodies consist of three bodies, the remaining body may be connected to parts of the other two bodies via the pivot parts, while two of the divided bodies are connected to each other. <000**********59>

[0014] The insertion projection may contact not only one or the other surface of the insertion division in the insertion direction, but also both surfaces of the insertion division in the insertion direction.

[0015] The above-mentioned contact with the radial surface in the opening recess refers to contact with at least one of the radially inner and radially outer surfaces.

[0016] The inner protrusions are provided on at least one of the two sides of the upper surface in the insertion direction. Furthermore, the inner protrusions may be provided one or more times on the divided upper surface.

[0017] The first inner protrusion and the second inner protrusion may be singular or plural. That is, this includes cases where one or both of the first inner protrusion and the second inner protrusion are singular or plural. The arrangement described above, where the components do not interfere with each other, includes, for example, cases where the first inner protrusion is located on one of the radially outer and inner sides and the second inner protrusion is located on the other radial side, or cases where the first inner protrusion and the second inner protrusion are arranged alternately, where they are located in places where they are not located relative to each other, or cases where the first inner protrusion and the second inner protrusion are located on the front and back surfaces of the divided upper surface, respectively.

[0018] According to this invention, since the contact convex portion provided on at least one of the insertion divided portion and the disk divided portion contacts the adjacent insertion divided portion or the disk divided portion, displacement of the divided body in the contact direction can be prevented. Thereby, displacement between the divided bodies can be prevented, and intrusion of a liquid body into the grommet can be prevented.

[0019] Furthermore, the abutment projection is provided on at least one of the adjacent insertion divisions and is an insertion projection that abuts against the adjacent insertion division in the insertion direction or radial direction through which the electric wire is inserted.

[0020] Therefore, the insertion projection provided on at least one of the insertion divisions can contact the other adjacent insertion division in the insertion direction or radial direction, thereby fixing adjacent divisions together. Consequently, the divisions can be fixed together while preventing misalignment of the divisions with respect to the wire insertion direction or radial direction, thus preventing liquid from entering the grommet. <00000**********89> Furthermore, since the insertion projection is equipped with a regulating projection that abuts against the other of the adjacent insertion division in the insertion direction, misalignment of the insertion division with respect to the insertion direction can be reliably prevented, thereby preventing liquid from entering the inside of the grommet.

[0022] Furthermore, the insertion division portion is provided with a pivot portion that pivotably connects adjacent insertion division portions, the fixing portion is provided on the opposite side of the insertion division portion from the pivot portion, and the regulating projection is provided on the radially outward side of the side where the pivot portion is provided.

[0023] Therefore, since adjacent segments are connected by a pivot, adjacent insertion segments can be fixed simply by pivoting the segments via the pivot. Furthermore, since the regulating projection is provided on the radially outer side of the side where the pivot is located, the pivot of the segments via the pivot causes the regulating projection to come into contact with other insertion segments before the segments are fixed together by the fixing part. This prevents misalignment of adjacent insertion segments and guides them so that they can be securely fixed together by the fixing part. Thus, adjacent segments can be easily and reliably fixed together without misalignment.

[0024] Furthermore, one of the adjacent insertion divisions is provided with an opening recess formed in the circumferential direction, and the other of the adjacent insertion divisions is provided with an insertion projection that is inserted into the opening recess and abuts against the opening recess in the insertion direction.

[0025] Therefore, since an opening recess for inserting the insertion projection is provided inside the insertion division, interference between the insertion projection and the wire routed in the routing space can be prevented when fixing the insertion divisions together. Consequently, damage to the wire routed through the grommet inner can be prevented.

[0026] Furthermore, since the insertion projection also contacts the radial surface of the opening recess, a simple structure in which the insertion projection is inserted into the opening recess can prevent misalignment not only in the insertion direction but also in the radial direction in adjacent insertion divisions. Therefore, the intrusion of liquid into the interior of the grommet can be prevented more reliably.

[0027] Furthermore, the inner body is provided with an upper surface on one end, and the inner divided portion has divided upper surfaces that constitute the upper surface, and at least one of the adjacent divided upper surfaces is provided with an inner protrusion that abuts against the adjacent divided upper surface in the insertion direction through which the electric wire is inserted.

[0028] Therefore, the inner protrusion provided on one side of the divided upper surface comes into contact with the other side of the divided upper surface in the insertion direction, thus preventing misalignment of the inner divided portion in the insertion direction. Furthermore, since the inner protrusions abut the surfaces of the divided upper parts, the rigidity of the upper parts is improved when the divided body is fixed in place. Therefore, even if an external force acts on the upper parts, damage to the wires routed in the routing space can be prevented.

[0029] Furthermore, the inner protrusion has a first inner protrusion provided on one of the divided upper surfaces and a second inner protrusion provided on the other divided upper surface adjacent to the first divided upper surface, and the first inner protrusion and the second inner protrusion are positioned so as not to interfere with each other when the adjacent divided bodies are fixed together.

[0030] Therefore, the first inner protrusion provided on one side of the divided upper surface and the second inner protrusion provided on the other side of the divided upper surface each abut against the other divided upper surface in the insertion direction, thus more reliably preventing misalignment of the inner divided parts in the insertion direction. In addition, the rigidity of the upper surface is further improved.

[0031] As an aspect of the present invention, as the abutting convex portion, a disk convex portion may be provided on at least one of the disk dividing portions adjacent in the circumferential direction and abut against the other adjacent disk dividing portion in the insertion direction of the electric wire.

[0032] According to the present invention, the divided bodies can be fixed in a state where the disk convex portion provided on one of the disk dividing portions abuts against the other adjacent disk dividing portion. Therefore, the divided bodies can be fixed while reliably preventing displacement in the insertion direction of the electric wire between the divided bodies.

[0033] Further, since the disk convex portion protrudes toward the other disk dividing portion, when assembling the divided bodies, the disk convex portion can function as a guide for aligning the positions of the disk dividing portions in the insertion direction. Thereby, the efficiency of the assembly work of the divided bodies can be improved, and the divided bodies can be reliably fixed. In addition, when the disk convex portion is provided at a position visible from the outside, the efficiency of the assembly work of the divided bodies can be more reliably improved.

[0034] In another aspect of this invention, the disc projection may be provided on one side in the insertion direction and at the inner end in the radial direction of the disc division. With this invention, a disc protrusion provided on one of the disc divisions comes into contact with the outer circumferential surface of the inner division, which is integrally formed with the adjacent disc division. As a result, a simple structure can prevent not only misalignment in the insertion direction but also misalignment in the radial direction of the division.

[0035] In another aspect of this invention, the disc projection may be defined as the first disc projection, and the abutting projection may be provided with a second disc projection that abuts in the insertion direction on the opposite side of the adjacent disc projection from the side to which the first disc projection abuts. The second disc protrusion may be located at the same position as the first disc protrusion in the radial direction, or it may be located at a different position from the first disc protrusion in the radial direction.

[0036] According to this invention, since the first disc protrusion and the second disc protrusion abut against one side and the other side in the insertion direction of the adjacent disc division, displacement of the disc division in the insertion direction can be reliably prevented. Therefore, displacement of the divided body in the insertion direction can be prevented more reliably.

[0037] In another aspect of this invention, the second disc projection may be provided on the other disc division portion that the first disc projection abuts against, and may abut against the other disc division portion that has the first disc projection. According to this invention, since it is not necessary to insert the other disc division portion between the first disc protrusion and the second disc protrusion, as in the case where the first disc protrusion and the second disc protrusion are on one side of the disc division portion, adjacent divisions can be easily assembled and misalignment in the insertion direction can be prevented.

[0038] Furthermore, if the first disc protrusion and the second disc protrusion are positioned at different locations in the radial direction, the first disc protrusion and the second disc protrusion can be brought into contact with adjacent divided disc sections in sequence. This allows the divided disc sections to be assembled without misalignment, ensuring secure fixation of the divided body, improving the workability of the assembly process, and more reliably preventing misalignment of the divided body in the insertion direction.

[0039] In another aspect of this invention, the divided body may be composed of two divided bodies, with a pivot portion provided to pivotably connect adjacent insertion divided portions, and the fixed portion may be provided at a position opposite to the pivot portion. The pivot portion includes, for example, cases in which adjacent divided bodies are integrally connected, or cases in which parts provided on adjacent divided bodies are combined to make them pivotable. In other words, adjacent divided bodies include cases in which they are integrally connected or separate via the pivot portion.

[0040] According to this invention, since adjacent divided parts are connected by a pivot, the divided parts can be fixed together simply by pivoting them via the pivot, while the contact protrusions abut against the adjacent insertion divided part or disc divided part. This allows for easy and reliable fixing of the divided parts and prevents misalignment of the divided parts. Furthermore, the grommet inner can be easily attached to the electric wire.

[0041] Furthermore, if adjacent segmented parts are integrally connected via a pivot, the number of parts can be reduced even further.

[0042] In another aspect of this invention, the fixing portion may include a locking fixing piece extending from one side in the circumferential direction of the insertion division portion, and a locking portion having an opening along the circumferential direction and locking the locking fixing piece in the insertion division portion adjacent to the insertion division portion having the locking fixing piece.

[0043] According to this invention, since the locking fixing piece and the locked portion are provided in the insertion division portion, it is possible to prevent the wires routed in the routing space from interfering with the fixing portion that locks and fixes adjacent divisions. This prevents damage to the wires. [Effects of the Invention]

[0044] This invention provides a grommet inner and a grommet that can prevent misalignment between fixed segments and prevent liquid from entering the grommet. [Brief explanation of the drawing]

[0045] [Figure 1] A schematic perspective view of the grommet attached to the panel. [Figure 2] A schematic exploded perspective view of a grommet. [Figure 3] A diagram illustrating the cover. [Figure 4] A schematic perspective view of the grommet inner in its divided state. [Figure 5] Diagram illustrating the first division. [Figure 6] Diagram illustrating the first division. [Figure 7] Diagram illustrating the second division. [Figure 8] Diagram illustrating the second division. [Figure 9] Diagram illustrating the assembly process of the first and second parts. [Figure 10] Diagram illustrating the assembly process of the first and second parts. [Figure 11] An explanatory diagram of the assembly process of the first and second parts. [Figure 12] Diagram illustrating the assembly process of the first and second parts. [Figure 13] Cross-sectional view of the grommet attached to the panel. [Figure 14] Diagram illustrating the second divided body, which is another embodiment. [Figure 15] An explanatory diagram of the first divided body, which is another embodiment. [Figure 16]A cross-sectional view of a grommet, which is another embodiment. [Modes for carrying out the invention]

[0046] One embodiment of this invention will be described below with reference to the drawings. The grommet 1 is a protective member that protects the electric wire WH that passes through the insertion hole P1 provided in the body panel P. This grommet 1 consists of a cylindrical cover 10 and a grommet inner 20 that is attached to the end of the cover 10 and fixed to the insertion hole P1. The grommet 1 and grommet inner 20 will be described below with reference to Figures 1 to 13.

[0047] Figure 1 shows a schematic perspective view of grommet 1 as seen from the non-insertion direction Hu, Figure 2 shows a schematic exploded perspective view of grommet 1 as seen from the non-insertion direction Hu, and Figure 3 shows an explanatory diagram of cover 10. To elaborate on Figure 3, Figure 3(a) shows a schematic plan view of the cover 10, and Figure 3(b) shows a cross-sectional view taken along the arrow AA in Figure 3(a).

[0048] Figure 4 shows a schematic perspective view of the grommet inner 20 with the first divided body 30 and the second divided body 40 released from their fixed positions and the second divided body 40 pivoted in a direction away from the first divided body 30. Figures 5 and 6 are explanatory diagrams illustrating the structure of the first divided body 30. Figure 5(a) shows a side view of the first divided body 30 viewed from one side in the longitudinal direction L, Figure 5(b) shows a bottom view of the first divided body 30, Figure 6(a) shows a front view of the first divided body 30, and Figure 6(b) shows a top view of the first divided body 30.

[0049] Figures 7 and 8 are explanatory diagrams illustrating the structure of the second divided body 40. Figure 7(a) shows a side view of the second divided body 40 viewed from one side in the longitudinal direction L, Figure 7(b) shows a bottom view of the second divided body 40, Figure 8(a) shows a rear view of the second divided body 40, and Figure 8(b) shows a top view of the second divided body 40.

[0050] Figures 9 to 12 are bottom views showing the process of pivoting the second divided body 40 relative to the first divided body 30 and locking and fixing the first divided body 30 and the second divided body 40 together. Specifically, Figure 9 shows a bottom view of the state in which the first divided body 30 and the second divided body 40 are separated, Figure 10 shows a bottom view of the state in which the second divided body 40 is pivoted relative to the first divided body 30, Figure 11 shows a bottom view of the state in which the second divided body 40 is further pivoted relative to the first divided body 30, and Figure 12 shows a bottom view of the state immediately before the second divided body 40 is locked and fixed to the first divided body 30.

[0051] Figure 13 shows a cross-sectional view of the grommet 1 attached to the body panel P. Note that Figure 13 is the cross-sectional view taken along arrow AA in Figure 3(a). Furthermore, for convenience, the electric wires WH are shown as dashed lines and are depicted as transparent to clarify the structure of the grommet 1.

[0052] In Figure 1, the vertical direction is defined as the insertion direction H, and the extension direction of the wire insertion section 12 is defined as the longitudinal direction L. The insertion direction H and the longitudinal direction L are perpendicular to each other. The direction perpendicular to both the longitudinal direction L and the insertion direction H is defined as the width direction W. Here, the downward side along the insertion direction H is defined as the insertion direction Hd, and the upward side is defined as the opposite insertion direction Hu. The directions in Figure 1 also apply to Figures 2 to 16. Furthermore, in Figure 1, the view from the left along the width direction W is defined as the front view.

[0053] As shown in Figures 1 and 2, the grommet 1 consists of a cylindrical cover 10 through which the electric wire WH is inserted, and a grommet inner 20 that is attached to the end of the cover 10 and fixed to the insertion hole P1.

[0054] The cover 10 is a hollow cylindrical body made of a flexible resin, and as shown in Figures 2 and 3(a), it is integrally composed of a mounting portion 11 which is formed in a substantially circular shape in plan view and has a housing space inside for accommodating the grommet inner 20, and a cylindrical wire insertion portion 12 which protrudes from the mounting portion 11 along the longitudinal direction L.

[0055] As shown in Figure 3(b), the mounting portion 11 consists of a main body portion 111 with a concave cross-section that is closed in the direction opposite to insertion Hu, and a flange housing portion 112 that protrudes radially outward from the end of the main body portion 111 in the direction of insertion Hd.

[0056] Here, the radial direction refers to the direction radiating outward from the center of the main body 111, which is formed in a roughly circular shape, when viewed from above. Furthermore, the radially outward direction refers to the direction outward from the center of the main body 111 along the radial direction, and the radially inward direction refers to the direction outward from the outside along the radial direction towards the center of the main body 111.

[0057] The flange housing portion 112 is an annular cylindrical body having an opening in the opposite insertion direction Hu that communicates with the main body portion 111, and a circular opening in the insertion direction Hd that has approximately the same outer diameter as the outer diameter of the insertion hole P1. In other words, the flange housing portion 112 is a cylindrical body having openings of different sizes in the opposite insertion direction Hu and in the insertion direction Hd. The inner circumferential surface of the flange housing portion 112 is provided with a mounting recess 113 that is recessed radially outward. The bottom portion of the flange housing portion 112 (the surface on the insertion direction Hd side) is provided with an outer rib 114 and an inner rib 115 that protrude toward the insertion direction Hd.

[0058] The mounting recess 113 is a groove formed by recessing the inner circumferential surface of the flange housing portion 112 radially outward, except for the portion corresponding to the central part in the longitudinal direction L and the width direction W. The outer diameter formed by the bottom of the groove of this mounting recess 113 is approximately equal to the outer diameter of the disc portion 22, and the groove width of the mounting recess 113 (length in the insertion direction H) is approximately equal to the plate thickness of the disc portion 22 (length along the insertion direction H), which will be described later. For this reason, the mounting recess 113 can accommodate the disc portion 22.

[0059] The outer rib 114 is a roughly annular rib formed in a roughly frustoconical shape, starting from the portion corresponding to the groove bottom of the mounting recess 113 and expanding radially outward as it moves toward the insertion direction Hd. The inner rib 115 is a roughly annular rib that protrudes radially inward from the outer rib 114 toward the insertion direction Hd. The length of the inner rib 115 (the length that protrudes toward the insertion direction Hd) is sufficiently shorter than the length of the outer rib 114.

[0060] The grommet inner 20 is integrally composed of an insertion portion 21 having an internal routing space S in which the electric wire WH is routed, an annular disc portion 22 positioned in the opposite insertion direction Hu of the insertion portion 21 and protruding radially outward from the insertion portion 21, and a hollow inner body 23 protruding from the disc portion 22 toward the opposite insertion direction Hu (see Figure 2).

[0061] The insertion portion 21 is formed in a substantially cylindrical shape having an outer diameter approximately the same as the outer diameter of the insertion hole P1, and four locking and fixing portions 24 are provided on its outer surface at equal intervals to sandwich and fix the body panel P together with the cover 10 attached to the disc portion 22.

[0062] The locking and fixing portion 24 is composed of a concave outer groove portion 241 formed by recessing the outer peripheral surface of the insertion portion 21 radially inward, a connecting portion 242 protruding radially outward from the bottom of the groove portion 241, and a locking piece 243 extending from the tip of the connecting portion 242 toward the opposite insertion direction Hu (see Figure 5(a)).

[0063] The connecting portion 242 is a projection that extends radially outward from the end of the outer groove portion 241 in the insertion direction Hd. The radial length of the connecting portion 242 is approximately the same as the depth of the groove in the outer groove portion 241.

[0064] The locking piece 243, which is connected to the tip of the connecting portion 242 and extends in the opposite direction of insertion Hu, is inclined radially outward so as it moves from the tip side (insertion direction Hd side) of the connecting portion 242 toward the opposite direction of insertion Hu, it gradually moves away from the bottom of the groove of the outer groove portion 241.

[0065] The disc portion 22 is a plate-like body with a predetermined thickness and a substantially annular shape in plan view. One end of the disc portion 22 in the longitudinal direction L and the other end in the width direction W are recessed radially inward. Furthermore, a through hole 25 is provided in the disc portion 22 at a location corresponding to the locking and fixing portion 24, passing through along the insertion direction H.

[0066] The inner body 23 is a hollow cylindrical body having an upper surface 231 in the direction opposite to the insertion direction Hu, and an insertion opening 232 communicating with the cable routing space S is provided on one side in the longitudinal direction L. Furthermore, a pair of opening ribs 233 are erected along the insertion direction H at both ends of the circumferential direction of the insertion opening 232, and a plurality of peripheral ribs 234 are erected along the insertion direction H on the outer circumferential surface of the inner body 23. The lower ends of the opening ribs 233 and peripheral ribs 234 are connected to the disc portion 22.

[0067] The grommet inner 20 configured in this way consists of a first divided body 30 and a second divided body 40 that can be assembled in the circumferential direction, as shown in Figure 4. The first divided body 30 and the second divided body 40 are pivotally connected via a hinge portion 26 and can be fixed via a fixing portion 27 provided on the opposite side of the hinge portion 26.

[0068] The following describes in detail the first divided body 30 and the second divided body 40, which are formed by evenly dividing the grommet inner 20 along the longitudinal direction L. As shown in Figure 4, the first divided body 30 and the second divided body 40 have substantially the same shape.

[0069] The first divided body 30 constitutes one side in the width direction W of the grommet inner 20, and as shown in Figures 4 to 6, it is composed of a first insertion divided portion 31 which constitutes a part of the insertion portion 21, a first disc divided portion 32 which constitutes a part of the disc portion 22, and a first inner divided portion 33 which constitutes a part of the inner body 23.

[0070] As shown in Figures 5(b) and 6(a), the first insertion division section 31 is composed of a first annular rib 51, which is erected from the first disc division section 32 toward the insertion direction Hd and is formed in a substantially semicircular shape when viewed from the bottom, and a first radial rib 52 that is aligned in the radial direction. As shown in Figure 5(b), the first annular rib 51 is composed of a first radial outer rib 511 that forms the outer circumferential surface of the first insertion division portion 31, a first intermediate rib 512 provided radially inward of the first radial outer rib 511, a first radial inner rib 513 provided radially inward of the first intermediate rib 512, a first shortening rib 514 provided radially inward of the first radial inner rib 513, and a first innermost rib 515 provided radially inward of the first shortening rib 514.

[0071] The first outer diameter rib 511, the first intermediate rib 512, and the first inner diameter rib 513 are configured to have equal lengths along the insertion direction H, as shown in Figure 6(a). In contrast, the first shortening rib 514 and the first innermost rib 515 are configured to have shorter lengths along the insertion direction H compared to the first inner diameter rib 513. The first innermost rib 515 is configured to have shorter lengths along the insertion direction H compared to the first shortening rib 514.

[0072] In other words, the first radial outer rib 511, the first intermediate rib 512, the first radial inner rib 513, the first shortening rib 514, and the first innermost rib 515, which are arranged from the radial outer side to the radial inner side, are composed of substantially similar shapes that decrease in diameter as they move radially inward, as shown in Figures 5(b) and 6(a). Furthermore, the first radial inner rib 513, the first shortening rib 514, and the first innermost rib 515 are stepped in the direction opposite to the insertion direction Hu as they move radially inward. Furthermore, the first innermost rib 515 is not provided on one side in the longitudinal direction L corresponding to the first opening forming portion 333, which will be described later. In other words, a space is formed in the insertion direction Hd of the first opening forming portion 333.

[0073] Furthermore, the first intermediate rib 512, the first radial inner rib 513, the first shortened rib 514, and the first innermost rib 515 are arranged at equal intervals along the radial direction. In contrast, the distance between the first radial outer rib 511 and the first intermediate rib 512 is shorter than the distance between the first intermediate rib 512 and the first radial inner rib 513.

[0074] The first radial outer rib 511, which constitutes the outer circumferential surface of the grommet inner 20, is formed to be slightly inclined radially inward as it approaches the insertion direction Hd. A locking and fixing portion 24 is provided at a predetermined location in the circumferential direction, more specifically, at a position of ±45 with respect to a line passing through the center of the first radial outer rib 511 along the width direction W when viewed from the bottom.

[0075] As shown in Figures 5(b) and 6(a), the first radial rib 52 consists of a pair of first straight ribs 521 arranged parallel to each other at a predetermined distance apart, and a first opening reinforcing rib 522 provided on one side in the longitudinal direction L at a position corresponding to the outer edge of the first opening forming portion 333, which will be described later.

[0076] As shown in Figure 5(b), the pair of first straight ribs 521 are arranged radially along the radial direction, with a central axis extending from the center of the first annular rib 51 in a plan view along the insertion direction H. More specifically, multiple first straight ribs 521 are arranged along the circumferential direction at intervals of 45 degrees. That is, the first straight ribs 521 are arranged along the longitudinal direction L on one and the other side of the longitudinal direction L, and along the width direction W in the central part of the longitudinal direction L. In addition, in a bottom view, the first straight ribs 521 are positioned at ±45 degrees relative to a line passing through the center of the first annular rib 51 along the width direction W.

[0077] The first straight rib 521 will be described in detail. As shown in Figure 6(a), the first straight rib 521 is configured to gradually incline radially outward from the inner circumferential surface of the first inner division portion 33 as it moves toward the insertion direction Hd. More specifically, the radially arranged first straight ribs 521 are basically inclined radially outward as they move toward the insertion direction Hd, in the portion radially inward of the first inner diameter rib 513, and connect the inner circumferential surface of the first inner division portion 33 with the first innermost rib 515, the first shortened rib 514, and the lower end portions of the first inner diameter rib 513. Furthermore, in the portion radially outward of the first inner diameter rib 513, the first straight rib 521 connects the first inner diameter rib 513, the first intermediate rib 512, and the first outer diameter rib 511. The lower end of the first straight rib 521 is flush with the lower end of the first outer diameter rib 511 between the first inner diameter rib 513 and the first outer diameter rib 511.

[0078] As shown in Figure 5(b), the first insertion division 31 has a recess in the radial direction at the other end in the longitudinal direction L. More specifically, the first radial outer rib 511 is not erected at the other end in the longitudinal direction L of the first insertion division 31, and the outer circumferential surface of the first insertion division 31 is recessed in the radial direction. Therefore, at the other end in the longitudinal direction L, the first intermediate rib 512 forms the outer circumferential surface of the first insertion division 31.

[0079] Therefore, the pair of first straight ribs 521 located on the other side in the longitudinal direction L connect the inner circumferential surface of the first inner division portion 33 and the first intermediate rib 512. Furthermore, the pair of first straight ribs 521 located on the other side in the longitudinal direction L, similar to the first straight ribs 521 described above, are inclined radially outward as they move toward the insertion direction Hd, on the radially inward side.

[0080] Furthermore, as described above, the first innermost rib 515 is not provided on one side of the first insertion division 31 in the longitudinal direction L. Therefore, the pair of first straight ribs 521 arranged on one side in the longitudinal direction L connect the first shortening rib 514 and the first radially outer rib 511. The pair of first straight ribs 521 arranged on one side in the longitudinal direction L are inclined radially outward as they move toward the insertion direction Hd, similar to the first straight ribs 521 described above.

[0081] Furthermore, in a bottom view, one of the first straight ribs 521, positioned at a -45-degree angle to a line passing through the center of the first annular rib 51 along the width direction W, connects the first shortening rib 514 and the first outer diameter rib 511, similar to the pair of first straight ribs 521 positioned on one side in the longitudinal direction L.

[0082] Of the multiple first straight ribs 521 arranged in this manner, the first straight ribs 521 (first straight rib 521a and first straight rib 521b) located at the other end in the width direction W, together with the first outer diameter rib 511 and the first intermediate rib 512, form the outer wall of the first insertion division portion 31 in the width direction W, as shown in Figures 5(b) and 6(a).

[0083] Of the first straight ribs 521 located at the other end in the width direction W, the first straight rib 521a located on the other side in the longitudinal direction L has a first hinge portion 53 that constitutes part of the hinge portion 26, as shown in Figures 5(b), 6(a), and 6(b). Furthermore, a locking recess 54 is provided at the end of the first straight rib 521a in the insertion direction Hd, and on the radially inward side of the first hinge portion 53, formed by penetrating the first straight rib 521a toward one side in the width direction W.

[0084] The locking recess 54 is a recess having a width (length along the longitudinal direction L) that is approximately equal to the distance between the first intermediate rib 512 and the first inner diameter rib 513, and a height (length along the insertion direction H) that is approximately equal to the plate thickness of the first disc division portion 32.

[0085] On the other hand, of the first straight ribs 521 located at the other end in the width direction W, the first straight rib 521b provided on one side in the longitudinal direction L has a fixing piece 55 that constitutes part of the fixing portion 27, and an insertion projection 56 on the radially outer side of the fixing piece 55, as shown in Figures 5 and 6.

[0086] The fixing piece 55 consists of a shaft portion 551 that protrudes along the width direction W from a point corresponding to the first radial inner rib 513 of the first straight rib 521b, and a locking portion 552 that protrudes radially outward from the tip of the first straight rib 521. The shaft portion 551 is a flat projection having a length approximately equal to the length along the width direction W from the first straight rib 521b to the first opening reinforcing rib 522, and has a plate thickness approximately equal to that of the first diameter inner rib 513. Furthermore, the tip portion of the shaft portion 551 has a tapered shape, with both ends in the insertion direction H inclined inward as it approaches the tip.

[0087] As shown in Figure 5(b), the locking portion 552 is formed in a roughly triangular shape in plan view, protruding radially outward from the central tip of the shaft portion 551. The radially outward surface of the locking portion 552 is inclined radially outward as it approaches the base end.

[0088] The insertion projection 56 is a flat plate-shaped projection that protrudes in the width direction W from the corresponding locations between the first diameter outer rib 511 and the first intermediate rib 512, and between the first intermediate rib 512 and the first diameter inner rib 513, on the first straight rib 521b, and protrudes in the width direction W by a length approximately equal to the width of the first straight rib 521b. The thickness of the insertion projection 56 is approximately the same as the thickness of the fixing piece 55. The amount of protrusion of the insertion projection 56 (length in the width direction W) is approximately half the amount of protrusion of the shaft portion 551.

[0089] As shown in Figure 5(b), the first opening reinforcing rib 522 is erected from the first disc division portion 32 toward the insertion direction Hd at a location corresponding to one side in the width direction W of the first opening forming portion 333. This first opening reinforcing rib 522 has the same shape as the first straight rib 521 that connects the inner circumferential surface of the first inner division portion 33 and the first outer diameter rib 511. The first opening reinforcing rib 522 is oriented along the longitudinal direction L.

[0090] As shown in Figures 5(b) and 6(b), the first disc division section 32 is an annular plate-like body configured in a substantially semicircular shape in plan view, with the first inner division section 33 erected from the radially inner end. Furthermore, a through hole 25 is provided in the first disc division section 32 at the location corresponding to the locking and fixing section 24, extending through along the insertion direction H. In addition, a disc projection 321 protruding along the width direction W is provided on the other side in the longitudinal direction L of the upper disc surface 32a of the first disc division section 32.

[0091] The disc projection 321 is a flat, plate-shaped projection that protrudes from the inner diameter end of the upper surface 32a of the disc toward the other side in the width direction W. This disc projection 321 has a width approximately equal to the thickness of the first inner diameter rib 513 and is made of approximately the same thickness as the thickness of the first disc division portion 32.

[0092] As shown in Figures 5(a), 6(a), and 6(b), the first inner division portion 33 is composed of a first side portion 331 having a substantially semicircular outer surface that rises from the first disc division portion 32, and a substantially semicircular divided first upper surface portion 332 that constitutes a part of the upper surface 231.

[0093] The first side portion 331 is formed as a roughly semicircular annular body in plan view, erected from the radially inner end of the first disc division portion 32 toward the opposite insertion direction Hu. Multiple peripheral ribs 234 are erected in the circumferential direction of this first side portion 331. Furthermore, as shown in Figures 6(a) and 6(b), one side of the first side portion 331 in the longitudinal direction L is provided with a first opening forming portion 333 that forms an insertion opening 232, and an opening rib 233 is erected on the other side of the first opening forming portion 333 in the width direction W. In addition, a first opening reinforcing rib 522 is erected from the first disc division portion 32 in the insertion direction Hd of the opening rib 233 that is erected from the first disc division portion 32 toward the opposite insertion direction Hu.

[0094] In the first disc division portion 32, the area corresponding to the first opening forming portion 333 is provided with a first gap portion 322 that is recessed radially outward. One end face of this first gap portion 322 in the longitudinal direction L is flush with the radially inner surface of the first shortening rib 514 that rises from the first disc division portion 32 toward the insertion direction Hd.

[0095] As shown in Figures 6(a) and 6(b), two first inner protrusions 334 are provided on the back side of the divided first upper surface portion 332, which constitutes a part of the upper surface 231, at predetermined intervals along the longitudinal direction L. The first inner protrusion 334 is a projection that extends toward the other side in the width direction W, and is provided in the central portion and on one side in the longitudinal direction L. The distance between the first inner protrusions 334 is equal to the width of the first inner protrusion 334 (length along the longitudinal direction L).

[0096] The second divided body 40, which has substantially the same external shape as the first divided body 30, constitutes the other side in the width direction W of the grommet inner 20, and as shown in Figures 4, 7, and 8, it is composed of a second insertion divided body 41 which constitutes a part of the insertion portion 21, a second disc divided body 42 which constitutes a part of the disc portion 22, and a second inner divided body 43 which constitutes a part of the inner body 23.

[0097] As shown in Figures 7(b) and 8(a), the second insertion division section 41 is composed of a second annular rib 61, which is erected from the second disc division section 42 toward the insertion direction Hd and is formed in a substantially semi-circular shape when viewed from the bottom, and second radial ribs 62 which are arranged radially along the radial direction.

[0098] The second annular rib 61 is formed symmetrically with respect to the first annular rib 51, with the plane along the longitudinal direction L being the plane of symmetry. That is, as shown in Figure 7(b), the second annular rib 61 is composed of a second radial outer rib 611 that forms the outer circumferential surface of the second insertion division 41, a second intermediate rib 612 provided radially inward of the second radial outer rib 611, a second radial inner rib 613 provided radially inward of the second intermediate rib 612, a second shortening rib 614 provided radially inward of the second radial inner rib 613, and a second innermost rib 615 provided radially inward of the second shortening rib 614.

[0099] Here, the second outer diameter rib 611, the second intermediate rib 612, the second inner diameter rib 613, the second shortened rib 614, and the second innermost rib 615 have the same configuration as the first outer diameter rib 511, the first intermediate rib 512, the first inner diameter rib 513, the first shortened rib 514, and the first innermost rib 515, respectively, except for their symmetry with respect to the plane, so their explanation is omitted here.

[0100] The second radial rib 62, like the first radial rib 52, consists of a pair of second straight ribs 621 arranged parallel to each other at a predetermined distance apart, and a second opening reinforcing rib 622 on the other side in the longitudinal direction L, which corresponds to the outer edge of the second opening forming portion 433, which will be described later (see Figure 7(b)).

[0101] Here, the second straight rib 621 has the same configuration as the first straight rib 521, except that there are no pairs of second straight ribs 621 along the longitudinal direction L on one side of the longitudinal direction L, and that it is symmetrical in plane. Therefore, its explanation is omitted here. Similarly, the second opening reinforcing rib 622 has the same configuration as the first opening reinforcing rib 522, except that it is symmetrical in plane. Therefore, its explanation is omitted here.

[0102] Of the multiple second straight ribs 621 arranged in this manner, the second straight ribs 621 (second straight rib 621a and second straight rib 621b) located at one end in the width direction W, together with the second outer diameter rib 611 and the second intermediate rib 612, form the outer wall of the second insertion division portion 41 in the width direction W, as shown in Figures 7(b) and 8(a).

[0103] Of the second straight ribs 621 located at one end in the width direction W, the second straight rib 621a located on the other end in the longitudinal direction L has a second hinge portion 63 provided at the other end in the longitudinal direction L, radially outward and forming part of the hinge portion 26. This second hinge portion 63 is integrally formed with the first hinge portion 53, and the second divided body 40 can be pivoted relative to the first divided body 30 using the hinge portion 26 as the pivot axis.

[0104] Furthermore, at the end of the second straight rib 621a in the insertion direction Hd, and on the radially inward side of the second hinge portion 63, there is a substantially plate-shaped regulating projection 64 that protrudes toward one side in the width direction W. The regulating projection 64 is a plate-like body having a width length (length along the longitudinal direction L) that is approximately equal to the distance between the second intermediate rib 612 and the second radially inward rib 613, and a height (length along the insertion direction H) that is approximately equal to the plate thickness of the second disc division portion 42.

[0105] On the other hand, among the second straight ribs 621 located at one end in the width direction W, the second straight rib 621b located on one side in the longitudinal direction L is provided with a fixing recess 65 for locking and fixing the fixing piece 55 and an insertion recess 66 arranged along the longitudinal direction L, as shown in Figures 7(b) and 8(a).

[0106] The fixing recess 65 is formed by penetrating the second straight rib 621b through the portion corresponding to the second inner diameter rib 613 along the width direction W. This fixing recess 65 is a recess having a width (length along the longitudinal direction L) and height (length along the insertion direction H) that are approximately equal to the length of the shaft portion 551 in the longitudinal direction L and the length in the insertion direction H. In other words, the fixing recess 65 is configured to allow insertion of the shaft portion 551.

[0107] On the other hand, the insertion recess 66 is formed on one side of the fixed recess 65 in the longitudinal direction L, with the second straight rib 621b passing through it along the width direction W. This insertion recess 66 is a recess having a height equal to the length of the insertion projection 56 in the insertion direction H (length along the insertion direction H), and is configured to allow the insertion of two side-by-side insertion projections 56. Note that one end of the insertion recess 66 in the longitudinal direction L corresponds to the radially inner end of the second radial outer rib 611. In this configuration, the boundary between the fixed recess 65 and the insertion recess 66, which are formed by passing through the second straight rib 621b, has a locking portion 651 formed in the shape of a plate along the insertion direction H.

[0108] As shown in Figure 8(b), the second disc division section 42 is an annular plate-like body configured in a substantially semicircular shape in plan view, with the second inner division section 43 erected from the radially inner end. Furthermore, a through hole 25 is provided in the second disc division section 42 at the location corresponding to the locking and fixing section 24, passing through along the insertion direction H.

[0109] As shown in Figures 7(a), 8(a), and 8(b), the second inner division portion 43 is composed of a second side portion 431 having a substantially semicircular outer surface that rises from the first disc division portion 32, and a substantially semicircular divided second upper surface portion 432 that constitutes a part of the upper surface 231.

[0110] The second side portion 431 is formed as a roughly semicircular annular body in plan view, erected from the radially inner end of the second disc division portion 42 toward the opposite insertion direction Hu. Multiple peripheral ribs 234 are erected in the circumferential direction of this second side portion 431. In addition, one side of the second side portion 431 in the longitudinal direction L is provided with a second opening forming portion 433 that forms an insertion opening 232, and an opening rib 233 is erected on one side of the second opening forming portion 433 in the width direction W. A second shortening rib 614 is erected from the second disc division portion 42 toward the opposite insertion direction Hu of the second side portion 431 in the insertion direction Hd.

[0111] Furthermore, the portion of the second disc division section 42 corresponding to the second opening forming section 433 is provided with a second gap section 422 formed by recessing it radially outward. One end face of this second gap section 422 in the longitudinal direction L is flush with the radially inner surface of the second shortening rib 614 that rises from the second disc division section 42 toward the insertion direction Hd.

[0112] As shown in Figures 8(a) and 8(b), two second inner protrusions 434 are provided on the back side of the divided second upper surface portion 432, which constitutes a part of the inner body 23, at predetermined intervals along the longitudinal direction L. The second inner protrusion 434 is a projection that extends toward one side in the width direction W, and has the same shape as the first inner protrusion 334. This second inner protrusion 434 is provided on one side of the longitudinal direction L and the other side of the longitudinal direction L, slightly towards the center of the longitudinal direction L. The distance between the second inner protrusions 434 is equal to the width of the second inner protrusion 434 (length along the longitudinal direction L).

[0113] As shown in Figures 9 to 12, the first divided body 30 and the second divided body 40 configured in this way can be made into a grommet inner 20 by pivoting the second divided body 40 relative to the first divided body 30 using the hinge portion 26, which is composed of the first hinge portion 53 and the second hinge portion 63, as the pivot axis, thereby fixing the fixing portion 27, which is composed of the fixing piece 55 and the fixing recess 65.

[0114] The following briefly describes, with reference to Figures 9 to 12, a method for assembling the grommet inner 20 to the electric wire WH by assembling the first divided body 30 and the second divided body 40 at desired positions on the electric wire WH, and then moving the second divided body 40 relative to the first divided body 30 to fix the fixing piece 55 and the fixing recess 65. In Figures 9 to 12, the electric wires WH are omitted for convenience in order to clarify the configuration of the first divided body 30 and the second divided body 40.

[0115] First, as shown in Figure 9, with the first divided body 30 and the second divided body 40 separated, the first divided body 30 and the second divided body 40 are positioned so that, in the insertion direction Hd of the cover 10, the electric wire WH inserted through the electric wire insertion part 12 is positioned between the first opening forming part 333 and the second opening forming part 433. In this state, the second divided body 40 is pivoted relative to the first divided body 30 using the hinge part 26, which is composed of the first hinge part 53 and the second hinge part 63, as the pivot axis (see Figure 10).

[0116] By pivoting the second divided body 40 relative to the first divided body 30 in this manner, the restricting projection 64, which is located on the other end side of the second straight rib 621a in the longitudinal direction L, i.e., near the hinge portion 26, is inserted into the locking recess 54 provided on the first straight rib 521a (see Figure 10). As a result, the surface of the restricting projection 64 in the direction opposite to insertion Hu comes into contact with the surface of the locking recess 54 in the direction opposite to insertion Hd, thereby restricting the movement of the first divided body 30 relative to the second divided body 40 in the direction opposite to insertion Hu.

[0117] Furthermore, by pivoting the second divided body 40 relative to the first divided body 30, the disc projection 321 provided on the upper surface 32a of the disc is positioned on the surface of the second divided body 42 in the direction opposite to the insertion direction Hu (see Figure 11). That is, the surface of the disc projection 321 in the insertion direction Hd and the surface of the second divided body 42 in the direction opposite to the insertion direction Hu come into contact, thereby restricting the movement of the first divided body 30 relative to the second divided body 40 in the insertion direction Hd. In this way, the disc projection 321 and the restricting projection 64, which are positioned at different locations along the longitudinal direction L, can restrict the relative movement of the first divided body 30 relative to the second divided body 40 in the direction opposite to the insertion direction Hu and in the insertion direction Hd, thus preventing the first divided body 30 from twisting relative to the second divided body 40.

[0118] Therefore, when the second divided body 40 is further pivoted relative to the first divided body 30, the fixing piece 55 and the insertion projection 56 can be reliably inserted into the fixing recess 65 and the insertion recess 66 (see Figure 12), and the fixing piece 55 and the locking portion 651 can be locked and fixed.

[0119] In the grommet inner 20 to which the first divided body 30 and the second divided body 40 are locked and fixed, the first straight rib 521a and the second straight rib 621a, and the first straight rib 521b and the second straight rib 621b are in surface contact with each other.

[0120] Furthermore, since the length of the insertion recess 66 in the insertion direction H is equal to the length of the insertion projection 56 in the insertion direction H, when the fixing piece 55 is inserted into the fixing recess 65, the insertion projection 56 fits into the insertion recess 66 so as to abut against the surfaces of the insertion recess 66 in the opposite direction Hu and the insertion direction Hd (see Figure 13). Therefore, the movement of the first split body 30 in the insertion direction H relative to the second split body 40 can also be restricted on one side in the longitudinal direction L.

[0121] Furthermore, since the disc projection 321 is provided at the radially inward end of the first disc division 32, when the first division 30 and the second division 40 are locked and fixed by the fixing part 27, the disc projection 321 comes into contact with the outer circumferential surface of the second disc division 42, thereby restricting the radial movement of the first division 30 relative to the second division 40.

[0122] Similarly, of the two insertion protrusions 56, the one on the longitudinal side L abuts against the end face on the longitudinal side L of the insertion recess 66 when the fixing piece 55 is locked to the locking portion 651. Therefore, by inserting the insertion protrusion 56 into the insertion recess 66, the radial movement of the first divided body 30 relative to the second divided body 40 can be restricted.

[0123] Furthermore, since the first inner protrusions 334 and the second inner protrusions 434 provided on the first upper surface portion 332 and the second upper surface portion 432 are arranged alternately adjacent to each other, it is possible to restrict the movement of the second divided body 40 in the insertion direction H relative to the first divided body 30 while restricting its movement in the longitudinal direction L.

[0124] By assembling the disc portion 22 of the grommet inner 20, which locks and fixes the first divided body 30 and the second divided body 40 in this manner, into the mounting recess 113, a grommet 1 can be formed by attaching the grommet inner 20 to the cover 10. Then, by inserting the grommet inner 20 through the insertion hole P1 and sandwiching the body panel P between the locking and fixing portion 24 and the cover 10, the grommet 1 can be fixed to the body panel P (see Figure 13).

[0125] Thus, the grommet inner 20, which, together with the cover 10, forms a grommet 1 that protects the electric wire WH inserted through the insertion hole P1 provided in the body panel P, is composed of a cylindrical insertion portion 21 that is inserted through the insertion hole P1 and has a routing space S inside which the electric wire WH is routed, an annular disc portion 22 that is positioned on one side of the insertion portion 21 and protrudes radially outward from the insertion portion 21, and a hollow inner body 23 that protrudes to one side from the disc portion 22 and communicates with the routing space S. The grommet inner 20, which is attached to the end of the cover 10 and fixed to the insertion hole P1, is composed of a plurality of first divided parts 30 and second divided parts 40 that can be divided in the circumferential direction, and is provided with a fixing portion 27 that fixes adjacent first divided parts 30 and second divided parts 40 when assembled. Furthermore, the first divided body 30 and the second divided body 40 are integrally constructed from a first insertion divided portion 31 and a second insertion divided portion 41 constituting the insertion portion 21, a first disc divided portion 32 and a second disc divided portion 42 constituting the disc portion 22, and a first inner divided portion 33 and a second inner divided portion 43 constituting the inner body 23. The first insertion divided portion 31 and the second insertion divided portion 41, or the first disc divided portion 32, have disc protrusions 321, insertion protrusions 56 and regulating protrusions 64 that protrude toward the adjacent first divided body 30 or second divided body 40 when fixed by the fixing portion 27, and that abut against the adjacent first insertion divided portion 31 and the second insertion divided portion 41 or the first disc divided portion 32 and the second disc divided portion 42. The grommet 1 consists of a grommet inner 20 and a cylindrical cover 10 through which the electric wire WH is inserted, with the grommet inner 20 attached to the end of the cover 10.

[0126] The grommet inner 20 has insertion protrusions 56 and regulating protrusions 64 provided on the first insertion division portion 31 and the second insertion division portion 41, or a disc protrusion 321 provided on the first disc division portion 32, which come into contact with the adjacent first insertion division portion 31 and the second insertion division portion 41, or the second disc division portion 42. This prevents misalignment of the first division portion 30 and the second division portion 40 in the direction of contact. As a result, misalignment of the first division portion 30 and the second division portion 40 can be prevented, and liquids such as rainwater can not enter the inside of the grommet 1.

[0127] Furthermore, the disc projection 321 is provided on the first disc division portion 32 of the two disc division portions 32 and 42 that are adjacent in the circumferential direction, and it abuts against the other adjacent second disc division portion 42 in the insertion direction H through which the electric wire WH is inserted. As a result, the first divided body 30 and the second divided body 40 can be fixed in a state where the disc projection 321 provided on the first disc division portion 32 is in contact with the adjacent second disc division portion 42. Therefore, the first divided body 30 and the second divided body 40 can be fixed while reliably preventing misalignment of the first divided body 30 and the second divided body 40 with respect to the insertion direction H, which is the direction in which the electric wire WH is inserted.

[0128] Furthermore, since the disc projection 321 protrudes toward the second disc division 42, when fixing the first division 30 and the second division 40, the disc projection 321 can function as a guide for aligning the first disc division 32 and the second disc division 42. This improves the efficiency of the assembly work of the first division 30 and the second division 40, and ensures that the first division 30 and the second division 40 are securely fixed. In addition, since the disc projection 321 is provided on the inner body 23 side (opposite insertion direction Hu) of the first disc division 32, the disc projection 321 is easily visible from the outside, further improving the efficiency of the assembly work of the first division 30 and the second division 40.

[0129] Furthermore, since the disc projection 321 is located in the opposite insertion direction Hu and at the radial inner end of the first disc division portion 32 and the second disc division portion 42, the disc projection 321 on the first disc division portion 32 comes into contact with the outer circumferential surface of the second inner division portion 43, which is integrally formed with the adjacent second disc division portion 42. This makes it possible to prevent not only misalignment in the insertion direction H, but also radial misalignment in the first division portion 30 and the second division portion 40 with a simple structure.

[0130] Furthermore, the grommet inner 20 is composed of a first divided body 30 and a second divided body 40, and is provided with a hinge portion 26 that pivotably connects the adjacent first insertion divided portion 31 and the second insertion divided portion 41, and the fixing portion 27 is provided at a position opposite to the hinge portion 26. As a result, the first divided body 30 and the second divided body 40 can be fixed to the adjacent first insertion divided portion 31 and the second insertion divided portion 41, or the second disc divided portion 42, while the insertion projection 56 and the regulating projection 64, or the disc projection 321, are brought into contact with the adjacent first insertion divided portion 31 and the second insertion divided portion 41, or the second disc divided portion 42.

[0131] Therefore, the first divided body 30 and the second divided body 40 can be easily and reliably fixed, and misalignment of the first divided body 30 and the second divided body 40 can be prevented. In addition, the grommet inner 20 can be easily assembled to the electric wire WH. Furthermore, since the adjacent first divided body 30 and the second divided body 40 are integrally formed via the hinge portion 26, the number of parts can also be reduced.

[0132] Furthermore, the insertion projection 56 and the regulating projection 64 are provided on the adjacent first insertion division section 31 and second insertion division section 41, and abut against the adjacent first insertion division section 31 and second insertion division section 41 in at least one of the insertion direction H and radial direction through which the electric wire WH is inserted.

[0133] As a result, the insertion projection 56 and regulating projection 64 provided on the first insertion division section 31 and the second insertion division section 41 are in contact with at least one of the insertion direction H and radial direction of the adjacent first insertion division section 31 and second insertion division section 41, thereby fixing the first division section 30 and the second division section 40. Therefore, the first division section 30 and the second division section 40 can be fixed while preventing misalignment of the electric wire WH with respect to the insertion direction H or radial direction, and preventing liquid from entering the inside of the grommet 1.

[0134] Specifically, the regulating projection 64 abuts against the adjacent first insertion division portion 31 in the insertion direction H, thereby reliably preventing misalignment of the first insertion division portion 31 and the second insertion division portion 41 with respect to the insertion direction H. Therefore, it is possible to prevent liquid from entering the interior of the grommet 1.

[0135] Furthermore, the first insertion division portion 31 and the second insertion division portion 41 are provided with hinge portions 26 that pivotally connect the adjacent first insertion division portion 31 and the second insertion division portion 41, the fixing portion 27 is provided on the opposite side of the hinge portion 26 in the first insertion division portion 31 and the second insertion division portion 41, and the regulating projection 64 is provided on the radially outward side on the side where the hinge portion 26 is provided.

[0136] As a result, the adjacent first insertion division 31 and second insertion division 41 can be fixed simply by pivoting the first division 30 and the second division 40 via the hinge portion 26. Furthermore, since the regulating projection 64 is provided on the radially outward side on the side where the hinge portion 26 is provided, the regulating projection 64 comes into contact with the first insertion division 31 before the first division 30 and the second division 40 are fixed by the fixing portion 27 due to the pivoting of the second division 40 relative to the first division 30 via the hinge portion 26. Therefore, the first division 30 and the second division 40 can be guided so that they can be securely fixed by the fixing portion 27 while preventing misalignment of the adjacent first insertion division 31 and the second insertion division 41. Thus, the adjacent first division 30 and the second division 40 can be easily and reliably fixed without misalignment.

[0137] Furthermore, the second insertion division portion 41 of the adjacent first insertion division portion 31 and second insertion division portion 41 is provided with an insertion recess 66 formed with an opening along the circumferential direction, and the insertion projection 56 is provided in the first insertion division portion 31 of the adjacent first insertion division portion 31 and second insertion division portion 41 so as to be inserted into the insertion recess 66 and to be in contact with the insertion recess 66 in the insertion direction H.

[0138] This prevents the insertion projection 56 from interfering with the electric wire WH routed in the routing space S when the first insertion division 31 and the second insertion division 41 are fixed together. Therefore, damage to the electric wire WH inserted through the grommet inner 20 can be prevented.

[0139] Furthermore, the insertion projection 56 also contacts the radial surface of the insertion recess 66, and with a simple structure that allows the insertion projection 56 to be inserted into the insertion recess 66, it is possible to prevent not only misalignment in the insertion direction H but also in the radial direction in the adjacent first insertion division 31 and second insertion division 41. Therefore, the intrusion of liquid into the interior of the grommet 1 can be prevented more reliably.

[0140] Furthermore, the inner body 23 has an upper surface 231 on one end, and the first inner divided portion 33 and the second inner divided portion 43 have a divided first upper surface portion 332 and a divided second upper surface portion 432 that constitute the upper surface 231, and adjacent divided first upper surface portion 332 and divided second upper surface portion 432 are provided with a first inner protrusion 334 and a second inner protrusion 434 that abut against the adjacent divided first upper surface portion 332 and divided second upper surface portion 432 in the insertion direction H through which the electric wire WH is inserted.

[0141] As a result, the first inner protrusion 334 and the second inner protrusion 434 provided on the divided first upper surface 332 and the divided second upper surface 432 abut against the other surface of the paired divided first upper surface 332 and divided second upper surface 432 in the insertion direction H, preventing misalignment of the first inner divided portion 33 and the second inner divided portion 43 with respect to the insertion direction H. Furthermore, since the first inner protrusion 334 and the second inner protrusion 434 abut against the surfaces of the divided divided first upper surface 332 and the divided second upper surface 432, the rigidity of the upper surface 231 is improved when the first divided body 30 and the second divided body 40 are fixed. Therefore, even if an external force acts on the upper surface 231, damage to the electric wires WH routed in the routing space S can be prevented.

[0142] Furthermore, since the first inner protrusion 334 and the second inner protrusion 434 are positioned so as not to interfere with each other when the adjacent first divided body 30 and second divided body 40 are fixed together, the first inner protrusion 334 provided on the first divided upper surface 332 and the second inner protrusion 434 provided on the other side of the second divided upper surface 432 reliably contact the second divided upper surface 432 and the first divided upper surface 332 respectively in the insertion direction H without interference. Therefore, misalignment of the first inner divided portion 33 and the second inner divided portion 43 with respect to the insertion direction H can be prevented more reliably. In addition, the rigidity of the upper surface 231 is further improved.

[0143] Furthermore, the fixing portion 27 consists of a fixing piece 55 extending from one side in the circumferential direction of the first insertion division portion 31, and a fixing recess 65 along the circumferential direction in the second insertion division portion 41 adjacent to the first insertion division portion 31 having the fixing piece 55, as well as a locking portion 651 for locking the fixing piece 55. Since the fixing piece 55 and the locking portion 651 are provided in the first insertion division portion 31 and the second insertion division portion 41, it is possible to prevent the electric wire WH routed in the routing space S from interfering with the fixing portion 27 that locks and fixes the adjacent first division body 30 and second division body 40. This prevents damage to the electric wire WH.

[0144] In the correspondence between the structure of this invention and the embodiments described above, The panel corresponds to body panel P, and similarly, The insertion hole corresponds to insertion hole P1, The electric wires are compatible with electric wire WH. The grommet corresponds to grommet 1, The cover is compatible with cover 10. The insertion portion corresponds to the insertion portion 21, The disc portion corresponds to the disc portion 22, The inner body corresponds to inner body 23, The grommet inner is compatible with grommet inner 20. The divided part corresponds to the first divided part 30, The fixing part corresponds to the fixing part 27, The insertion division section corresponds to the first insertion division section 31 and the second insertion division section 41. The disc division section corresponds to the first disc division section 32 and the second disc division section 42. The inner division section corresponds to the first inner division section 33 and the second inner division section 43. The contact protrusions correspond to the disc protrusion 321, the insertion protrusion 56, and the regulating protrusion 64. The disc protrusion corresponds to the disc protrusion 321, The pivot part corresponds to the hinge part 26, The insertion projection corresponds to the insertion projection 56 and the regulating projection 64. The regulatory protrusion corresponds to the regulatory protrusion 64, The opening recess corresponds to the insertion recess 66, The insertion projection corresponds to the insertion projection 56. The top part corresponds to the top surface 231, The divided upper portion corresponds to the first divided upper portion 332 and the second divided upper portion 432. The inner protrusions correspond to the first inner protrusion 334 and the second inner protrusion 434. The first inner protrusion corresponds to the first inner protrusion 334, The second inner protrusion corresponds to the second inner protrusion 434, The locking fixing piece corresponds to the fixing piece 55. The locked portion corresponds to the locked portion 651, This invention is not limited to the configuration of the embodiments described above, and many other embodiments can be obtained.

[0145] For example, in this embodiment, the grommet inner 20 is composed of a first divided body 30 and a second divided body 40, but it is not limited to being divided into two parts; it may be divided into three or four parts, or more than three parts. Also, in this embodiment, the first divided body 30 and the second divided body 40 are substantially the same shape, but they may have different shapes, for example, with different lengths in the circumferential direction. Furthermore, in this embodiment, the first divided body 30 and the second divided body 40 are pivotally connected via the hinge portion 26, but they may also be completely separable.

[0146] Furthermore, in this embodiment, the insertion recess 66 penetrates a part of the second insertion division 41, more specifically, the second straight rib 621b along the circumferential direction, but it may also be configured to be recessed along the circumferential direction of the second straight rib 621b.

[0147] Furthermore, when the fixing piece 55 is inserted into the fixing recess 65, the insertion projection 56 is in contact with the surfaces of the insertion recess 66 in the direction opposite to the insertion direction (insertion direction H) Hu and the insertion direction Hd. However, it is also possible for the insertion projection 56 to be in contact with only one of the surfaces of the insertion recess 66 in the direction opposite to the insertion direction Hu and the insertion direction Hd. Furthermore, although the insertion projection 56 is in contact with the radially outer surface of the insertion recess 66, it may also be in contact with the radially inner surface, or with both the radially outer and radially inner surfaces.

[0148] Furthermore, although two first inner protrusions 334 and two second inner protrusions 434 are provided, there may be one or more. Also, although the first inner protrusions 334 and two second inner protrusions 434 are provided on the back side (the side in the insertion direction Hd) of the divided first upper surface 332 and divided second upper surface 432, for example, at least a part of the first inner protrusions 334 and two second inner protrusions 434 may be provided on the front side (the side opposite the insertion direction Hu) of the divided first upper surface 332 and divided second upper surface 432.

[0149] Furthermore, although the hinge portion 26 integrally connects the adjacent first divided body 30 and the second divided body 40, they may also be configured to be pivotable by combining the parts provided on the first divided body 30 and the second divided body 40. In other words, the adjacent first divided body 30 and the second divided body 40 may be formed as a single unit or as separate units via the hinge portion 26. Furthermore, in this embodiment, the disc projection 321, the insertion projection 56, and the regulating projection 64 are provided on one of the first divided body 30 and the second divided body 40, but they may also be provided on both the first divided body 30 and the second divided body 40, respectively.

[0150] Furthermore, in this embodiment, a disc projection 321 is provided on the upper surface 32a of the disc to prevent relative movement of the second disc 40 with respect to the first disc 30 in the insertion direction H. However, as shown in Figures 14 to 16, for example, in addition to the disc projection 321 provided on the upper surface 32a of the disc, a back-side disc projection 421 may be provided on the surface (back side) of the second disc division 42 in the insertion direction Hd.

[0151] The grommet 1x having the rear disc projection 421 will be briefly described below with reference to Figures 14 to 16. In Figures 14 to 16, the same numbering is used for components that are the same as those in the embodiment described above, and their descriptions are omitted.

[0152] Figure 14 is an explanatory diagram illustrating the second divided body 40x, which is provided with a rear disc-shaped protrusion 421; Figure 15 is an explanatory diagram illustrating the first divided body 30x which locks and fixes with the second divided body 40x; and Figure 16 shows a schematic cross-sectional view of a grommet 1 having a grommet inner 20x which locks and fixes the first divided body 30x and the second divided body 40x.

[0153] Figures 14 to 16 will be described in detail. Figure 14(a) shows a rear view of the second divided body 40x, and Figure 14(b) shows a bottom view of the second divided body 40x. Figure 15(a) shows a front view of the first divided body 30x. Figure 16 shows a schematic cross-sectional view of a cross section obtained by cutting the central part of the width direction W in the grommet 1x along the longitudinal direction L, viewed from the other side in the width direction W.

[0154] The back-side disc projection 421 provided on the second divided body 40x is a flat plate-shaped projection that protrudes toward one side in the width direction W from the radially outer side of the surface (back side) in the insertion direction Hd of the second divided disc portion 42, or more specifically, from a position on the second straight rib 621a corresponding to the surface (back side) in the insertion direction Hd of the second divided disc portion 42.

[0155] On the other hand, when the first divided body 30x and the second divided body 40x are fixed together by the fixing part 27, the first insertion divided part 31 has a fitting recess 57 into which the back side disc protrusion 421 can be fitted. This fitting recess 57 is formed by penetrating the first straight rib 521a at a position corresponding to the surface (back side) of the first disc divided part 32 in the insertion direction Hd (see Figure 15).

[0156] The surface of the back-side disc projection 421 configured in this way, in the direction opposite to the insertion direction Hu, comes into contact with the surface of the first disc division 32 in the insertion direction Hd within the grommet inner 20x that fixes the first division 30x and the second division 40x (see Figure 16). As a result, the disc projection 321 and the back-side disc projection 421 come into contact with the second disc division 42 and the first disc division 32, respectively, along the insertion direction H, thereby restricting the movement of the second division 40x relative to the first division 30x in the insertion direction H.

[0157] Thus, in addition to the disc protrusion 321 corresponding to the first disc protrusion, the second disc division portion 42 is provided with a back-side disc protrusion 421 corresponding to the second disc protrusion. The back-side disc protrusion 421 abuts against the surface of the first disc division portion 32 in the insertion direction Hd and in the insertion direction H, thereby preventing misalignment of the first disc division portion 32 and the second disc division portion 42 in the insertion direction H. Therefore, misalignment of the first divided body 30x and the second divided body 40x in the insertion direction H can be prevented more reliably.

[0158] Furthermore, the back-side disc projection 421 is provided on the second disc division portion 42 with which the disc projection 321 abuts, and abuts against one of the first disc division portions 32 which has the disc projection 321. Therefore, compared to the case where both the disc projection 321 and the back-side disc projection 421 are located on the first disc division portion 32, there is no need to insert the second disc division portion 42 between the disc projection 321 and the back-side disc projection 421, so that adjacent first division portions 30x and second division portions 40x can be easily assembled and misalignment in the insertion direction H can be prevented.

[0159] Furthermore, since the disc projection 321 and the back disc projection 421 are located at different positions in the radial direction, the disc projection 321 and the back disc projection 421 can be brought into sequential contact with the adjacent first disc division portion 32 and second disc division portion 42. This allows the first disc division portion 32 and the second disc division portion 42 to be assembled in a position without misalignment, thereby ensuring that the first divided body 30x and the second divided body 40x are securely fixed. In addition, this improves the workability of the assembly of the first divided body 30x and the second divided body 40x, and more reliably prevents misalignment of the first divided body 30x and the second divided body 40x in the insertion direction H.

[0160] In the above-described configuration, the back-side disc projection 421 is provided on the second disc division section 42 which is assembled with the first disc division section 32 on which the disc projection 321 is provided. However, the back-side disc projection 421 may also be provided on the first disc division section 32. Furthermore, when the first division section 30x and the second division section 40x are fixed together, the back-side disc projection 421 is in a different position from the disc projection 321 in the radial direction, but it may also be in the same position as the disc projection 321 in the radial direction. [Explanation of symbols]

[0161] 1 grommet 10 Covers 20 Grommet Inner 21 Insertion part 22 Disc section 23 Inner body 26 Hinge section 27 Fixed part 30 First split body 31 First insertion division section 32 First disc division section 33 First inner split section 40 Second split body 41 Second insertion division section 42 Second disc division section 43 Second inner split section 55 Fixed piece 56 Insertion protrusion 64 Restriction protrusion 66 Insertion recess 321 Disc-shaped protrusion 332 First divided upper surface part 334 First inner protrusion 421 Reverse side disc protrusion 432 Second split upper surface part 434 Second inner protrusion 651 Locked part P Body Panel P1 Through hole WH electric wire

Claims

1. A grommet inner is formed together with a cover to protect an electric wire that passes through an insertion hole provided in a panel, and is composed of a cylindrical insertion portion that is inserted through the insertion hole and has a routing space inside which the electric wire is routed, an annular disc portion that is positioned on one side of the insertion portion and protrudes radially outward from the insertion portion, and a hollow inner body that protrudes outward from the disc portion to one side and communicates with the routing space, and is attached to the end of the cover and fixed in the insertion hole, It is composed of multiple divided parts that can be separated in the circumferential direction, and is equipped with fixing parts that fix adjacent divided parts together when assembled. The aforementioned divided body is The insertion portion comprising the insertion division portion, the disc division portion comprising the disc portion, and the inner division portion comprising the inner body are integrally formed. At least one of the insertion division portion and the disc division portion has a contact projection that protrudes toward the adjacent division body when fixed by the fixing portion and abuts against the adjacent insertion division portion or the disc division portion, The aforementioned contact protrusion is, It is provided on at least one of the adjacent insertion divisions and has an insertion projection that abuts against the adjacent insertion division in the insertion direction or radial direction through which the electric wire is inserted, The aforementioned insertion projection is, It is equipped with a restricting projection that abuts against the other adjacent insertion division in the insertion direction, The insertion division portion is provided with a pivot portion that pivotably connects adjacent insertion division portions to each other. The fixing portion is provided on the opposite side of the pivot portion in the insertion division portion, The regulating projection is provided on the radially outward side of the side on which the pivot portion is provided. An opening recess formed with an opening along the circumferential direction is provided in one of the adjacent insertion division portions. The aforementioned insertion projection is, The other adjacent insertion division portion is provided with an insertion projection that is inserted into the opening recess and abuts against the opening recess in the insertion direction, The insertion projection also contacts the radial surface in the opening recess, The inner body has an upper surface portion provided on one end, The inner divided portion constitutes the upper portion and has a divided upper portion, At least one of the adjacent divided upper surfaces is provided with an inner protrusion that abuts against the adjacent divided upper surface in the insertion direction through which the electric wire is inserted. The aforementioned inner protrusion is It has a first inner protrusion provided on one of the divided upper surfaces, and a second inner protrusion provided on the other divided upper surface adjacent to the first divided upper surface, The first inner protrusion and the second inner protrusion are positioned so as not to interfere with each other when the adjacent divided bodies are fixed together. Grommet inner.

2. The aforementioned contact protrusion is, It is provided on at least one of the circumferentially adjacent disc divisions and has a disc protrusion that abuts against the other adjacent disc division in the insertion direction through which the electric wire is inserted. The grommet inner according to claim 1.

3. The aforementioned disc-shaped protrusion is Provided on one side in the insertion direction and at the inner end in the radial direction of the disc division portion The grommet inner according to claim 2.

4. The aforementioned disc protrusion is referred to as the first disc protrusion. The aforementioned contact protrusion is, On at least one of the disc division portion on which the first disc projection is provided and on the other disc division portion to which the first disc projection abuts, The first disc projection has a second disc projection that contacts the opposite side of the first disc projection. The grommet inner according to claim 2 or claim 3.

5. The aforementioned second disc protrusion is, A portion of the other disc division that the first disc protrusion abuts against is provided, and a portion of the disc division that abuts against the one disc division that has the first disc protrusion. The grommet inner according to claim 4.

6. The aforementioned fixing part is A locking and fixing piece extending from one side in the circumferential direction of the insertion division portion, The insertion division having the locking fixing piece and the insertion division adjacent to it are provided with an opening along the circumferential direction and a locking portion for locking the locking fixing piece. A grommet inner according to any one of claims 1 to 5.

7. A grommet inner according to any one of claims 1 to 6, It consists of a cylindrical cover through which an electric wire is inserted, The grommet inner is attached to the end of the cover. Grommet.

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