Wire protection equipment

Abstract

To provide a wire protector that causes no defects even if it is fixed in a state where it is brought close or in contact with surrounding components.SOLUTION: A wire protector (grommet 1) includes a tubular part 2 into which a wire WH is inserted. Formed is an uneven portion 20 continued on the outer circumferential surface of the tubular part 2 at an angle to a longitudinal direction L and a circumferential direction C. Provided is a protruding portion 23 protruding in an outwardly radial direction from a convex portion 21 on the uneven portion 20. The flexibility of the protruding portion 23 is higher than that of the uneven portion 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wire protector that protects an electric wire. [Background technology]

[0002] Conventionally, wire protectors that protect electric wires have been known (see Patent Documents 1 and 2). The wire protector includes a tubular portion through which the electric wire is inserted, and this tubular portion has flexibility so as to be curved along the wiring path of the electric wire.

[0003] However, such wire protectors may be fixed in a state close to or in contact with surrounding components. In such cases, there have been problems such as the wire protector rubbing against the surrounding components to cause abrasion marks, or the wire protector coming into forceful contact with the surrounding components to cause abnormal noise. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-209854 A [Patent Document 2] JP 2019-169351 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a wire protector that does not cause any problems even when fixed in close proximity to or in contact with surrounding components. [Means for solving the problem]

[0006] The present invention is provided with a cylindrical portion through which an electric wire is inserted, and a continuous concave-convex pattern is formed on an outer peripheral surface of the cylindrical portion in a longitudinal direction and diagonally with respect to a circumferential direction, and a protruding portion is provided protruding from at least one of the convex portion and the concave portion of the concave-convex pattern, and the flexibility of the protruding portion is higher than the flexibility of the concave-convex pattern. The protruding portion protrudes from a base portion formed on the outer circumferential surface of the cylindrical portion.It is a wire protector.

[0007] The present invention also relates to an electric wire protector which includes a tubular portion through which an electric wire is inserted, and has an outer peripheral surface on which continuous concave and convex portions are formed in a longitudinal and circumferential direction at an angle, and has a protrusion protruding from at least one of the convex and concave portions of the concave and convex portions, the flexibility of the protrusion being greater than the flexibility of the concave and convex portions, and the protrusion being provided so as to be freely attached and detached to the tubular portion. The term "flexibility" refers to the property of being able to freely deform when subjected to an external force. In the present invention, the protrusions are configured to deform more easily than the recesses and projections when subjected to an external force.

[0008] According to the present invention, it is possible to prevent problems from occurring even when the sensor is fixed in a state close to or in contact with surrounding components. More specifically, the wire protector according to the present invention has continuous convex and concave portions formed on the outer peripheral surface of the cylindrical portion in the longitudinal direction and diagonally with respect to the circumferential direction, so that in a cross section perpendicular to the longitudinal direction of the cylindrical portion, convex portions are always present and concave portions adjacent to the convex portions are not connected in a ring shape, thereby preventing local bending (bending) of the wire protector.

[0009] In addition, the wire protector according to the present invention is provided with a protrusion protruding from at least one of the convex and concave portions of the concave and convex portions, and the flexibility of the protrusion is higher than that of the concave and convex portions. Therefore, even if the wire protector is bent or vibrated in a state where it is in contact with the surrounding parts, the deformation of the protrusion suppresses the displacement of the contact portion, and the abrasion between the contact portion and the surrounding parts can be prevented. In addition, when the wire protector is not in contact with the surrounding parts and then comes into forceful contact with them, the deformation of the protrusion can attenuate the impact force. Therefore, it is possible to prevent malfunctions from occurring even when the wire protector is fixed in a state close to or in contact with the surrounding parts.

[0010] In addition, since the protrusion protrudes from a base portion formed on the outer circumferential surface of the cylindrical body, even if the protrusion falls over from the base end portion, the base portion abuts against surrounding components and prevents the protrusion from abutting against the cylindrical body, thereby preventing the cylindrical body from breaking and exposing the electric wires.

[0011] On the other hand, since the protrusions are detachable from the cylindrical body, the number, shape, orientation, and distribution of the protrusions can be freely changed. The material of the protrusions can also be changed. Therefore, specifications can be tailored to individual environments.

[0012] As an aspect of the present invention, the protrusion may be a rod-shaped body aligned along the convex portion and the concave portion. In the present invention, the rod-shaped body is a concept including all shapes whose length is greater than the diameter at the base end (the diameter of the circumscribed circle in the case of a polygonal shape). For example, rod-shaped bodies in the shape of a cone, a truncated cone, a cylinder, a pyramid, a truncated pyramid, a prism, etc. are conceivable.

[0013] According to this invention, the protrusion is deformable in all circumferential directions, so that it is easy to set the flexibility of the protrusion relatively high. Therefore, even if the wire protector is bent or vibrated in any direction, the deformation of the protrusion suppresses the displacement of the contact portion, and the abrasion between the contact portion and surrounding components can be prevented. Therefore, the occurrence of abrasion marks can be reliably prevented.

[0014] As a further aspect of the present invention, the protrusion may be a plate-like body aligned along or continuous with the convex portion and the concave portion. In the present invention, the plate-like body is a concept including all shapes in which the length and width are greater than the thickness at the base end. For example, a plate-like body having a flat plate shape, a spiral plate shape, etc. are conceivable.

[0015] According to this invention, the protrusion is deformable only in the out-of-plane direction (thickness direction), so it is easy to set the rigidity of the protrusion relatively high. Therefore, even if the wire protector comes into forceful contact with surrounding components, the impact force can be attenuated by the deformation of the protrusion. Therefore, it is possible to reliably prevent the generation of abnormal noise.

[0016] As a further aspect of the present invention, the protrusion may be inclined or curved randomly with respect to a radially outward direction of the cylindrical portion. According to this invention, the protrusion widely covers the outer circumferential surface of the cylindrical portion without any gaps, so that the protrusion abuts against relatively small or thin surrounding parts, or against corners protruding from surrounding parts, etc. Therefore, it is possible to more reliably prevent the occurrence of scratches, and furthermore, it is possible to more reliably prevent the occurrence of abnormal noise.

[0017] As a further aspect of the present invention, the protrusion may protrude from the recess of the recessed portions. According to this invention, when the bending angle of the tubular portion increases, the protruding portion is sandwiched between the convex portions on the inner circumferential side thereof, thereby making it possible to prevent the wire protector from bending locally at a specific concave portion.

[0018] As a further aspect of the present invention, the protrusion may be provided so as to be detachable from the cylindrical portion.

[0019] This invention allows the number, shape, orientation, and distribution of the protrusions to be freely changed, as well as the material of the protrusions, allowing specifications to be tailored to individual environments.

[0020] As a further aspect of the present invention, at least one end of the cylindrical portion may be provided with an attachment portion having a diameter larger than that of a tip edge of the protrusion.

[0021] According to this invention, the mounting portion can be attached to the mounting hole provided in the object to be fixed. Therefore, it is possible to protect the electric wire extending to the outside through the mounting hole of the object to be fixed. Furthermore, when the electric wire is inserted into the mounting hole of the object to be fixed, the protruding portion does not get caught in the mounting hole. Effect of the Invention

[0022] According to the present invention, it is possible to prevent problems from occurring even when the sensor is fixed in a state close to or in contact with surrounding components. [Brief description of the drawings]

[0023] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] XX arrow cross-sectional view in FIG. 2. [Figure 4] 3 is a cross-sectional view taken along line YY and line ZZ in FIG. 2 . [Diagram 5] 1 is a diagram illustrating a state in which a protrusion is deformed when a grommet is bent or vibrated. [Figure 6]11A and 11B are diagrams illustrating a state in which a protrusion is deformed when the grommet abuts against a surrounding component. [Figure 7] FIG. 11 is a cross-sectional view showing a grommet according to another embodiment. [Figure 8] FIG. 11 is a cross-sectional view showing a grommet according to another embodiment. [Figure 9] FIG. 11 is a cross-sectional view showing a grommet according to another embodiment. [Figure 10] FIG. 11 is a cross-sectional view showing a grommet according to another embodiment. [Figure 11] 13 is a cross-sectional view of a state in which a protrusion is fixed to a cylindrical portion during a manufacturing process of a grommet according to another embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An embodiment of the present invention will be described in detail with reference to the drawings. The wire protector according to the present invention is a grommet 1 that protects an electric wire WH that is stretched between a back door and a body of an automobile. However, the wire protector may be a corrugated wire, a protector, or other exterior member.

[0025] In this application, the directions of the grommet 1 are defined in all the drawings. That is, the longitudinal direction of the grommet 1 is designated as L, the width direction as W, and the up-down direction as H. Also, one side of the longitudinal direction L is designated as the +L side, the other side as the -L side, one side of the width direction W is designated as the +W side, the other side as the -W side, and one side of the up-down direction H is designated as the +H side, and the other side as the -H side.

[0026] Fig. 1 is a perspective view of grommet 1. Fig. 2 is a side view of grommet 1, Fig. 3 is a cross-sectional view taken along the line XX in Fig. 2, and Fig. 4 is a cross-sectional view taken along the line YY and ZZ in Fig. 2. Fig. 5 is an explanatory diagram of a state in which protrusion 23 deforms when grommet 1 is bent or vibrated, and Fig. 6 is an explanatory diagram of a state in which protrusion 23 deforms when grommet 1 abuts against a surrounding part P.

[0027] 1 and 2, the grommet 1 has a cylindrical portion 2 through which an electric wire WH is inserted, a door-side attachment portion 3 provided at one end (the end on the +L side) of the cylindrical portion 2, and a body-side attachment portion 4 provided at the other end (the end on the -L side) of the cylindrical portion 2. The grommet 1 also has an electric wire holding portion 5 extending from the body-side attachment portion 4 toward the other side (the -L side).

[0028] The cylindrical part 2 is a part that protects the electric wire WH inserted inside. The cylindrical part 2 is formed of synthetic rubber such as EPDM, and has flexibility that allows it to bend freely while maintaining a hollow cylindrical shape. An uneven surface 20 is formed on the outer circumferential surface of the cylindrical part 2, and further, a protruding part 23 is provided that protrudes radially outward from a protruding part 21 of the uneven surface 20. These will be described in detail after the door side mounting part 3, the body side mounting part 4, and the electric wire holding part 5 are described.

[0029] The door side mounting portion 3 is a portion that is fitted into a mounting hole Dh of the door panel D. The door side mounting portion 3 is provided integrally with one end portion (the end portion on the +L side) of the cylindrical portion 2, and has a tapered portion 31, a flange portion 32, and a fitting groove portion 33. The tapered portion 31 refers to a conical portion that is gradually enlarged in diameter toward one side (the +L side) in the longitudinal direction L, and the flange portion 32 refers to a disk portion having a diameter larger than the maximum diameter of the tapered portion 31. The maximum diameter of the flange portion 32 is larger than the diameter at the tip edge 23t of the above-mentioned protruding portion 23 (see FIG. 4(a)).

[0030] The fitting groove 33 is provided between the tapered portion 31 and the flange portion 32. The fitting groove 33 is composed of an inclined surface 331 whose diameter is reduced from one end (end on the +L side) of the tapered portion 31, and an abutment surface 332 perpendicular to the longitudinal direction L of the flange portion 32, and a groove portion 33g recessed toward one side (the +L side) is formed on the abutment surface 332 except for the outer peripheral edge 33e. With this configuration, the mounting hole Dh of the door panel D fits into the fitting groove 33, and the outer peripheral edge 33e of the abutment surface 332 abuts against the side surface of the door panel D without any gap. This makes it possible to prevent dust and dirt from entering through the mounting hole Dh of the door panel D, and water droplets from entering.

[0031] The arrow-shaped indicating portion 3E in the tapered portion 31 is intended to enable a worker to see at a glance the installation direction when installing the door side installation portion 3 to the door panel D.

[0032] The body side mounting portion 4 is a portion that is fitted into a mounting hole Bh of the body panel B. The body side mounting portion 4 is provided integrally with the other end portion (the end portion on the -L side) of the cylindrical portion 2, and has a tapered portion 41, a flange portion 42, and a fitting groove portion 43. The tapered portion 41 refers to a conical portion whose diameter gradually increases toward one side (the +L side) in the longitudinal direction L, and the flange portion 42 refers to a disk portion whose diameter is larger than the maximum diameter of the tapered portion 41. The maximum diameter of the flange portion 42 is larger than the diameter at the tip edge 23t of the above-mentioned protruding portion 23 (see FIG. 4(b)).

[0033] The fitting groove 43 is provided between the tapered portion 41 and the flange portion 42. The fitting groove 43 is composed of an inclined surface 431 whose diameter is reduced from one end (end on the +L side) of the tapered portion 41, and an abutment surface 432 perpendicular to the longitudinal direction L of the flange portion 42, and a groove portion 43g recessed toward one side (the +L side) is formed on the abutment surface 432 except for the outer peripheral edge 43e. With this configuration, the mounting hole Bh of the body panel B fits into the fitting groove 43, and the outer peripheral edge 43e of the abutment surface 432 abuts against the side surface of the body panel B without any gap. This makes it possible to prevent dust and dirt from entering through the mounting hole Bh of the body panel B, and water droplets from entering.

[0034] Incidentally, the arrow-shaped indicated portion 4E on the tapered portion 41 and the flange portion 42 is intended to enable a worker to see at a glance the installation direction when attaching the body side mounting portion 4 to the body panel B.

[0035] The electric wire holding part 5 is a part that holds the electric wire WH inserted therein. The electric wire holding part 5 is provided integrally with the other end part (the end part on the -L side) of the body side attachment part 4, and has a cylindrical part 51 and a return part 52. The cylindrical part 51 refers to a cylindrical part having a constant inner diameter and outer diameter along the longitudinal direction L, and the return part 52 refers to a protruding part provided on the other end part (the end part on the -L side) of the outer circumferential surface of the cylindrical part 51. The section from the tapered part 41 of the body side attachment part 4 to the return part 52 is a tape winding section to be described later.

[0036] Further, the electric wire holding part 5 has a slit 51s formed from the other end (-L end) of the cylindrical part 51 to the vicinity of the tapered part 41. The slit 51s is provided on one side peripheral surface (+W side peripheral surface) and the other side peripheral surface (-W side peripheral surface) in the width direction W. Therefore, the cylindrical part 51 and the return part 52 are composed of a semi-cylindrical part above the slit 51s and a semi-cylindrical part below the slit 51s. With this configuration, the cylindrical part 51 can be reduced in diameter by wrapping tape around the outer peripheral surface of the cylindrical part 51. Therefore, the electric wire holding part 5 can hold the electric wire WH inserted therein.

[0037] Next, the cylindrical portion 2 will be described in detail with reference to Figures 2 to 4. Here, the circumferential direction of the cylindrical portion 2 is defined as C (see Figures 4(a) and 4(b)). The circumferential direction C is a direction along an imaginary circle centered on the central axis A. Furthermore, the radially outward direction of the cylindrical portion 2 is defined as R (see Figures 4(a) and 4(b)). The radially outward direction R is a direction spreading out radially from the central axis A.

[0038] On the outer peripheral surface of the cylindrical portion 2, continuous convex and concave portions 20 are formed obliquely with respect to the longitudinal direction L and the circumferential direction C. The convex and concave portions 20 are formed in such a manner that convex portions 21, which are large diameter portions, and concave portions 22, which are small diameter portions, are alternately repeated, and further, a single convex portion 21 and a single concave portion 22 are arranged in parallel to each other in a spiral shape (see Figs. 2 and 3). With this configuration, the spiral convex portion 21 extends uninterruptedly on the outer peripheral surface of the cylindrical portion 2, so that in a cross section perpendicular to the longitudinal direction L of the cylindrical portion 2, the convex portion 21 is always present, and the concave portions 22 adjacent to the convex portion 21 are not connected in a ring shape (see Figs. 4(a) and 4(b)).

[0039] More specifically, as shown in Fig. 4(a), in a given vertical cross section, one side (+H side) in the up-down direction H is the convex portion 21, and the other side (-H side) in the up-down direction H is the concave portion 22. Also, as shown in Fig. 4(b), in a given vertical cross section, one side (+H side) in the up-down direction H is the concave portion 22, and the other side (-H side) in the up-down direction H is the convex portion 21. In this manner, in this grommet 1, by setting the diameter dimension Da of the convex portion 21, the diameter dimension Db of the concave portion 22, and the pitch dimension Dc, etc., it is configured so that 1 / 2 or more of the circumference is the convex portion 21, and less than 1 / 2 of the circumference is the concave portion 22.

[0040] Furthermore, the convex portion 21 of the concave-convex portion 20 is provided with a protrusion 23 that protrudes in the radially outward direction R. The protrusions 23 are rod-shaped bodies aligned along the convex portion 21, and each of the protrusions 23 is in a conical shape with a length dimension De greater than a diameter dimension Dd at the base end side. In the present grommet 1, the protrusions 23 are arranged at predetermined phase angles centered on the central axis A, and the protrusions 23 protrude radially in the entire circumferential direction of the tubular portion 2. However, since the present grommet 1 is provided with the aforementioned indicated portions 3E, 4E and has a fixed positional relationship with the surrounding part P (see FIG. 5), the protrusions 23 may protrude partially.

[0041] The protrusion 23 in the present grommet 1 is formed integrally with the tubular portion 2. The protrusion 23 is formed by flowing molten material into a conical hole provided in a mold for manufacturing the grommet 1. Therefore, by changing the diameter and depth of the conical hole, it is possible to change the diameter dimension Dd and length dimension De of the protrusion 23. In addition, by changing the shape of the conical hole, the protrusion 23 can be formed into a truncated cone shape, a cylindrical shape, a pyramid shape, a truncated pyramid shape, a prismatic shape, or the like.

[0042] Next, the reason why the provision of the protrusion 23 prevents the occurrence of abrasion marks will be described with reference to Fig. 5. Fig. 5(a) shows the state before the grommet 1 is bent or vibrated, and Fig. 5(b) shows the state after the grommet 1 is bent or vibrated.

[0043] When the grommet 1 is bent or vibrated while in contact with the surrounding part P, the cylindrical part 2 is displaced as shown in FIG. 5(b) (see arrow M). At this time, the base end part of the protrusion 23 is displaced together with the cylindrical part 2 (see arrow Mb), but the displacement of the contact part (leading edge 23t) of the protrusion 23 with the surrounding part P is kept small (see arrow Mt). In other words, the deflection of the protrusion 23 keeps the displacement of the contact part (leading edge 23t) of the protrusion 23 small. Therefore, it is possible to prevent the occurrence of scratches.

[0044] Next, the reason why abnormal noise is prevented by providing the protrusion 23 will be described with reference to Fig. 6. Fig. 6(a) shows the state before the grommet 1 abuts against the surrounding part P, and Fig. 6(b) shows the state when the grommet 1 abuts against the surrounding part P.

[0045] When the grommet 1 comes into forceful contact with the surrounding component P from a non-contact state, an impact force is applied to the protrusion 23 as shown in FIG. 6(b) (see arrow N). At this time, the contact portion (tip edge 23t) of the protrusion 23 with the surrounding component P is displaced in a direction intersecting the direction in which the impact force is applied (see arrow Nt), thereby attenuating the impact force received from the surrounding component P (see arrow Nb). In other words, the protrusion 23 flexes, thereby attenuating the impact force. This makes it possible to prevent the generation of abnormal noise.

[0046] As described above, the grommet 1 according to the present invention includes the cylindrical portion 2 through which the electric wire WH is inserted, and the cylindrical portion 2 has an outer peripheral surface on which continuous uneven portions 20 are formed obliquely with respect to the longitudinal direction L and the circumferential direction C. The uneven portions 20 are provided with protrusions 23 from the protrusions 21. The flexibility of the protrusions 23 is higher than that of the uneven portions 20.

[0047] According to such a grommet 1, even if it is fixed in a state close to or in contact with the surrounding part P, it is possible to prevent problems from occurring. More specifically, grommet 1 according to the present invention has continuous concave and convex portions 20 formed on the outer peripheral surface of tubular portion 2, which are diagonally aligned with respect to longitudinal direction L and circumferential direction C. Therefore, in a cross section perpendicular to longitudinal direction L of tubular portion 2, convex portions 21 are always present, and concave portions 22 adjacent to convex portions 21 are not connected in a ring shape, so that local bending (bending) of grommet 1 can be prevented.

[0048] In addition, the grommet 1 according to the present invention is provided with a protruding portion 23 that protrudes from the protruding portion 21 of the concave-convex portion 20, and the flexibility of the protruding portion 23 is higher than the flexibility of the concave-convex portion 20. Therefore, even if the grommet 1 is bent or vibrated in a state in which it is in contact with the surrounding part P, the deformation of the protruding portion 23 suppresses the displacement of the contact portion (the tip edge 23t), and it is possible to prevent the contact portion (the tip edge 23t) from rubbing against the surrounding part P. Furthermore, when the grommet 1 is in a state in which it is not in contact with the surrounding part P and then comes into forceful contact with the surrounding part P, the deformation of the protruding portion 23 can attenuate the impact force. Therefore, it is possible to prevent malfunctions from occurring even if the grommet 1 is fixed in a state in which it is close to or in contact with the surrounding part P.

[0049] In grommet 1 according to the present invention, protruding portion 23 is a rod-like body aligned along convex portion 21. More specifically, it is a cone-like shape with a length dimension De larger than a diameter dimension Dd on the base end side.

[0050] According to such a grommet 1, the protrusion 23 is deformable in all circumferential directions, so it is easy to set the flexibility of the protrusion 23 relatively high. Therefore, even if the grommet 1 is bent or vibrated in any direction, the deformation of the protrusion 23 suppresses the displacement of the abutting portion (leading edge 23t), and it is possible to prevent the abrasion between this abutting portion (leading edge 23t) and the surrounding parts P. Therefore, it is possible to reliably prevent the occurrence of abrasion marks.

[0051] In grommet 1 according to the present invention, door-side mounting portion 3 and body-side mounting portion 4, each having a diameter larger than tip edge 23t of protrusion 23, are provided at both ends of cylindrical portion 2. As shown in FIG.

[0052] According to such a grommet 1, the door side mounting portion 3 can be attached to the mounting hole Dh provided in the door panel D. Therefore, it is possible to protect the electric wire WH extending to the outside through the mounting hole Dh of the door panel D. In addition, the body side mounting portion 4 can be attached to the mounting hole Bh provided in the body panel B. Therefore, it is possible to protect the electric wire WH extending to the outside through the mounting hole Bh of the body panel B. In other words, it is possible to protect the electric wire WH that is stretched between the back door and the body of the automobile. In addition, when the electric wire WH is inserted through the mounting hole Dh of the door panel D, the protrusion 23 is not caught in the mounting hole Dh.

[0053] In the configuration of the present invention and the above-described embodiment, the wire protector of the present invention corresponds to the grommet 1, Similarly, The cylindrical part corresponds to the cylindrical part 2, The mounting parts correspond to the door side mounting part 3 and the body side mounting part 4, The convexo-concave corresponds to the concaveo-concave 20, The protrusion corresponds to the protrusion 21. The recess corresponds to the recess 22, The protrusion corresponds to the protrusion 23, The leading edge corresponds to leading edge 23t; The circumferential direction corresponds to the circumferential direction C, The longitudinal direction corresponds to the longitudinal direction L, The radially outward direction corresponds to the radially outward direction R, The electric wire corresponds to the electric wire WH, however, the present invention is not limited to the configuration of the above-mentioned embodiment, and many embodiments can be obtained.

[0054] For example, in the grommet 1 according to this embodiment, all the protrusions 23 are rod-shaped (cone-shaped) aligned along the convex portion 21. However, as shown in Fig. 7(a), they may be plate-shaped (flat) aligned along the convex portion 21. Or, as shown in Fig. 7(b), they may be plate-shaped (spiral plate) continuous along the convex portion 21. These plate-shaped bodies have a length dimension Dt and a plate width dimension (not shown) that are greater than a thickness dimension Ds at the base end side.

[0055] With this configuration, the protrusion 23 is deformable only in the out-of-plane direction (thickness direction), which makes it easy to set the rigidity of the protrusion 23 relatively high. Therefore, even if the grommet 1 abuts against the surrounding part P with force, the impact force can be attenuated by the deformation of the protrusion 23. Therefore, it is possible to reliably prevent the generation of abnormal noise.

[0056] Furthermore, in the grommet 1 according to this embodiment, all of the protrusions 23 are formed parallel to the radially outward direction R. However, as shown in Fig. 8(a), they may be inclined randomly with respect to the radially outward direction R. Alternatively, as shown in Fig. 8(b), they may be curved randomly with respect to the radially outward direction R.

[0057] With this configuration, the protrusion 23 widely covers the outer circumferential surface of the cylindrical portion 2 without any gaps, so that the protrusion 23 comes into contact with the relatively small or thin surrounding parts P, or with corners protruding from the surrounding parts P. This makes it possible to more reliably prevent the occurrence of scratches, and furthermore, makes it possible to more reliably prevent the occurrence of abnormal noise.

[0058] In the grommet 1 according to this embodiment, all of the protrusions 23 protrude from the protrusions 21 of the concave-convex structure 20 in the radially outward direction R. However, as shown in Fig. 9, they may protrude from a pedestal portion 24 formed on the outer circumferential surface of the tubular portion 2.

[0059] With this configuration, even if the protruding portion 23 falls down from the base end portion, the base portion 24 abuts against the surrounding parts P, and can be prevented from abutting against the cylindrical portion 2. Therefore, it is possible to prevent the cylindrical portion 2 from breaking and the electric wire WH from being exposed.

[0060] In the grommet 1 according to this embodiment, all of the protrusions 23 protrude from the protrusions 21 of the concave-convex structure 20 in the radially outward direction R. However, as shown in FIG.

[0061] With this configuration, when the bending angle of the tubular portion 2 becomes large, the protruding portion 23 is sandwiched between the convex portions 21 on the inner circumferential side. Therefore, the grommet 1 can be prevented from bending locally at a specific concave portion 22.

[0062] Furthermore, in the grommet 1 according to this embodiment, all of the protrusions 23 are formed integrally with the cylindrical body portion 2. However, as shown in FIG.

[0063] With this configuration, the number, shape, orientation, and distribution of the protrusions 23 (including the case where no protrusions 23 are provided at all) can be freely changed. The material of the protrusions 23 can also be changed. Therefore, specifications can be made according to individual environments.

[0064] Finally, in this application, the grommet 1 to which the technical idea of ​​the present invention is applied has been described. However, this technical idea can also be applied to a corrugated material that does not have an attachment portion (corresponding to the door-side attachment portion 3 and the body-side attachment portion 4 of the grommet 1). It can also be applied to a protector that regulates the routing path of the electric wire WH. Furthermore, it can also be applied to other exterior members (rubber tubes, urethane tubes, etc.). [Explanation of symbols]

[0065] 1…Grommet 2...Cylinder part 3…Door side mounting section 4…Body side mounting part 20...Rough part 21…Convex part 22…Recess 23...Protruding part 23t…Tip edge C…Circumferential direction L…Longitudinal direction R…Radially outward direction WH…Electric wire

Claims

1. A cylindrical portion through which an electric wire is inserted is provided, A continuous uneven surface is formed on the outer circumferential surface of the cylindrical portion in the longitudinal direction and diagonally with respect to the circumferential direction, a protruding portion protruding from at least one of the protruding portion and the recessed portion of the protruding and recessed portions is provided; The flexibility of the protrusions is higher than the flexibility of the concaves and convexes, The protruding portion protrudes from a base portion formed on an outer circumferential surface of the cylindrical portion. Wire protection equipment.

2. The protrusion is provided so as to be freely detachable from the cylindrical body. The wire protector according to claim 1.

3. A cylindrical portion through which an electric wire is inserted is provided, A continuous uneven surface is formed on the outer circumferential surface of the cylindrical portion in the longitudinal direction and diagonally with respect to the circumferential direction, a protruding portion protruding from at least one of the protruding portion and the recessed portion of the protruding and recessed portions is provided; The flexibility of the protrusions is higher than the flexibility of the concaves and convexes, The protrusion is provided so as to be freely detachable from the cylindrical body. Wire protection equipment.

4. The protruding portion is a rod-shaped body aligned along the convex portion and the concave portion. The wire protector according to any one of claims 1 to 3.

5. The protruding portion is a plate-like body aligned along or continuous with the convex portion and the concave portion. The wire protector according to any one of claims 1 to 3.

6. The protruding portion is inclined or curved randomly with respect to the radially outward direction of the cylindrical portion. The wire protector according to any one of claims 1 to 5.

7. The protruding portion protrudes from the recessed portion of the concave and convex portions. The wire protector according to any one of claims 1 to 6.

8. At least one end of the cylindrical portion is provided with an attachment portion having a diameter larger than that of the tip edge of the protruding portion. The wire protector according to any one of claims 1 to 7.

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