Grommet and wire harness

Abstract

A grommets body includes: a large-diameter tubular portion; a first small-diameter tubular portion disposed on one side of a through-hole; and a second small-diameter tubular portion disposed on the other side of the through-hole. The grommets body includes an umbrella-shaped sound-insulating portion that covers the through-hole from the other side, and the sound-insulating portion is configured such that its contact side surface is folded back radially outward from the grommets body, with a folded-back portion as a base point. In this state, the sound-insulating portion has a pleated shape, and in this state, the outer diameter of the sound-insulating portion is smaller than the inner diameter of the through-hole.

Description

Technical Field

[0001] This invention relates to a cable loop and a wire harness. Background Technology

[0002] When a wire passes through a through-hole pre-formed in a sheet metal, a known cable loop is fitted to the periphery of the through-hole to protect the wire from the periphery of the through-hole. Patent document JP2012-239321A discloses a technology related to a cable loop with a cable loop body for holding the wire as it passes through a through-hole in a vehicle body panel, which is the part being mounted. The cable loop body has an umbrella-shaped portion (umbrella-shaped sound insulation portion) extending from the outer periphery of a tubular wire harness support to the panel mounting portion, which is the part that is mounted to the vehicle body panel. By providing this umbrella-shaped portion, the cable loop is configured to suppress sound leakage around the portion that is mounted to the through-hole in the vehicle body panel. Summary of the Invention

[0003] In the cable ring disclosed in patent document JP2012-239321A, the outer diameter of the umbrella-shaped portion that suppresses sound leakage is larger than the inner diameter of the through hole through which the power supply line passes. As a result, when the cable ring is attached to the periphery of the through hole, the umbrella-shaped portion interferes with the part being attached, leading to poor operability when attaching the cable ring to the periphery of the through hole.

[0004] The present invention was made in view of such problems in conventional techniques. The object of the present invention is to provide a cable loop that can suppress interference with the component being fitted when the cable loop is fitted to the periphery of a through hole, and thus improve the operability when fitting the cable loop to the periphery of a through hole, and to provide a wire harness using the cable loop.

[0005] A grommets according to the invention are provided with a grommets body for holding an electrical wire passing through a through hole disposed in a connected component on its inner circumferential side, and the grommets body includes: a large-diameter tubular portion locked to the periphery of the through hole; a first small-diameter tubular portion disposed on one side of the opening of the through hole; a second small-diameter tubular portion disposed on the other side of the opening of the through hole; and an umbrella-shaped sound-insulating portion extending from the inner circumferential side of the grommets body to the outer circumferential side and covering the opening of the through hole from the other side. The sound insulation portion is configured such that it can be folded back with the inner surface of the sound insulation portion facing the radially outer side of the loop body, and the sound insulation portion has a pleated shape with multiple pleats in the circumferential direction when the inner surface of the sound insulation portion is folded back with the inner surface of the loop body facing the radially outer side of the loop body. In this state, the outer diameter of the sound insulation portion is smaller than the inner diameter of the through hole.

[0006] A wire harness according to the present invention includes the above-described cable loop.

[0007] The above-described configuration enables the provision of a grommets that suppress interference with the components being attached when the grommets are fitted to the periphery of a through hole, and thus improves operability when fitting the grommets to the periphery of a through hole, and provides a wire harness using the grommets. Attached Figure Description

[0008] Figure 1 This is a perspective view showing an example of a cable loop according to the first embodiment.

[0009] Figure 2 This is a cross-sectional view of the cable loop according to the first embodiment.

[0010] Figure 3 This is an exploded view of the cable loop according to the first embodiment.

[0011] Figure 4 This is a perspective view showing the umbrella-shaped sound insulation section of the first embodiment folded back.

[0012] Figure 5 This is a cross-sectional view showing the umbrella-shaped sound insulation section of the first embodiment folded back.

[0013] Figure 6 This is a perspective view showing an example of a cable loop according to the second embodiment.

[0014] Figure 7 This is a cross-sectional view of the cable loop according to the second embodiment.

[0015] Figure 8 This is an exploded view of the cable loop according to the second embodiment.

[0016] Figure 9 This is a perspective view showing the umbrella-shaped sound insulation section of the second embodiment folded back.

[0017] Figure 10 This is a cross-sectional view showing the state in which the umbrella-shaped sound insulation part of the second embodiment is folded back.

[0018] Figure 11 This is a perspective view showing an example of a cable loop according to a third embodiment.

[0019] Figure 12 This is a cross-sectional view of the cable loop according to the third embodiment.

[0020] Figure 13 This is a perspective view showing the umbrella-shaped sound insulation section in the third embodiment folded back.

[0021] Figure 14 This is a cross-sectional view showing the umbrella-shaped sound insulation section of the third embodiment folded back. Detailed Implementation

[0022] Various embodiments will be described below with reference to the accompanying drawings.

[0023] The grommet according to an embodiment will be described in detail below with reference to the accompanying drawings. For ease of explanation, the dimensions in the drawings have been enlarged and may differ from the actual scale.

[0024] [First Embodiment]

[0025] Figure 1 This is a perspective view of the cable loop 10 according to the first embodiment, and Figure 2 This is a cross-sectional view of the grommets 10 according to the first embodiment. As an example, the grommets 10 are fitted to the periphery of a pre-formed through-hole 2 in the vehicle body panel 1, which is the component to be fitted, and protect the wire W passing through the through-hole 2 from the periphery of the through-hole 2. The opening shape of the through-hole 2 is circular in this embodiment. The wire W can be a wire harness as a wire assembly. In the following description, "upper side" refers to the side facing the through-hole 2 when the grommets 10 are fitted to the periphery of the through-hole 2, and "lower side" refers to the opposite side of the upper side.

[0026] As an example, the body panel 1 includes a panel 1a disposed on one side (engine compartment side) of the body panel 1 and an insulator 1b (sound insulation material) disposed on the other side (vehicle interior side) of the body panel 1.

[0027] Figure 3 This is an exploded view of the sling 10. The sling 10 has a sling body 11 and an internal protector 30. Alternatively, the sling body 11 can be directly attached to the periphery of the through hole 2 without connecting the internal protector 30 to the sling body 11.

[0028] The cable ring body 11 is a tubular component that holds the wire W arranged on its inner periphery. The cable ring body 11 is formed of a flexible material such as rubber. The cable ring body 11 includes a large-diameter tubular portion 12, a first small-diameter tubular portion 13, a second small-diameter tubular portion 14, and a sound-insulating portion 15.

[0029] The internal protector 30 is connected to the large-diameter tubular portion 12. The outer diameter of the large-diameter tubular portion 12 is larger than the opening diameter of the through hole 2. The large-diameter tubular portion 12 has a mating groove 16 and a lip 17.

[0030] A groove 16 is formed annularly on the outer periphery of the large-diameter tubular portion 12, and when the inner protector 30 is connected to the large-diameter tubular portion 12, the flange 33 of the inner protector 30 engages with the groove 16. Alternatively, a recess 18 may be provided in a portion of the groove 16, which engages with a protrusion 33a formed in a portion of the flange 33.

[0031] The lip 17 is an annular seal that protrudes from the outer peripheral surface 12a opposite to the body panel 1 toward the body panel 1. The lip 17 may be composed of an inner peripheral lip 17a and an outer peripheral lip 17b. When the grommets 10 are fitted to the periphery of the through hole 2, the inner peripheral lip 17a and the outer peripheral lip 17b elastically deform in the direction of tilting toward the outer peripheral surface 12a and adhere to the peripheral surface of the through hole 2 provided on one surface of the body panel 1. This prevents water and the like from entering the interior from the outside of the grommets 10 through the space between the lip 17 and the surface of the body panel 1 opposite to the lip 17.

[0032] The first small-diameter tubular portion 13 is continuous with the opposite side of the large-diameter tubular portion 12, which is opposite to the side of the vehicle body panel 1, via the first expanded-diameter tubular portion 19 and the corrugated tube 20, and holds the wire W on the inner circumferential side. The first small-diameter tubular portion 13 is arranged on one side of the opening of the through hole 2 (engine compartment side), and the inner surface of the first small-diameter tubular portion 13 contacts the outer circumferential surface of the wire W for a predetermined length. The inner diameter of the first small-diameter tubular portion 13 is smaller than the inner diameter of the large-diameter tubular portion 12, and slightly smaller than or approximately equal to the outer diameter of the wire W. This prevents water and the like from entering the inside from the outside of the grommets 10 through the space between the inner surface of the first small-diameter tubular portion 13 and the outer circumferential surface of the wire W. The first small-diameter tubular portion 13 is formed of a flexible material, and therefore deforms according to the posture of the wire W. Furthermore, an annular first seal 13a may be disposed on the inner circumferential surface of the first small-diameter tubular portion 13, and the annular first seal 13a is configured to close the gap between the inner circumferential surface of the first small-diameter tubular portion 13 and the wire W.

[0033] The second small-diameter tubular portion 14 is continuous with the large-diameter tubular portion 12 on the side opposite to the vehicle body panel 1 via the second expanded-diameter tubular portion 21, and holds the wire W on its inner circumferential side. The second small-diameter tubular portion 14 is arranged on the other side of the opening of the through hole 2 (the vehicle interior side), and the inner surface of the second small-diameter tubular portion 14 contacts the outer circumferential surface of the wire W for a predetermined length. The inner diameter of the second small-diameter tubular portion 14 is smaller than the inner diameter of the large-diameter tubular portion 12, and slightly smaller than or approximately equal to the outer diameter of the wire W. This prevents water and the like from entering the interior from the outside of the grommets 10 through the space between the inner surface of the second small-diameter tubular portion 14 and the outer circumferential surface of the wire W. The second small-diameter tubular portion 14 is formed of a flexible material, and therefore deforms according to the posture of the wire W. Alternatively, an annular second seal 14a may be provided on the inner circumferential surface of the second small-diameter tubular portion 14, the annular second seal 14a being configured to close the gap between the inner circumferential surface of the second small-diameter tubular portion 14 and the wire W. Furthermore, a tongue portion 14b for wrapping tape may be provided as an extension at the end of the second small-diameter tubular portion 14.

[0034] The sound-insulating part 15 is formed in an umbrella shape or a flange shape on the outer peripheral side of the second expanded diameter tubular part 21, and extends from the inner peripheral side of the ring body 11 to the outer peripheral side. That is, the sound-insulating part 15 is formed in an umbrella shape or a flange shape extending from the outer surface of the second expanded diameter tubular part 21. When the ring 10 is fitted to the periphery of the through hole 2 and the sound-insulating part 15 is as described above... Figure 1 and Figure 2 When the sound insulation section 15 is expanded as shown, the outer periphery 15a at the end of the sound insulation section 15 is attached to the peripheral surface of the through hole 2 provided on another surface of the vehicle body panel 1. That is, in the sound insulation section 15 as shown... Figure 1 and Figure 2 In the expanded state shown, the outer diameter of the sound insulation section 15 is larger than the opening diameter of the through hole 2. As a result, a closed sound insulation space is formed between the sound insulation section 15 and the periphery of the through hole 2, and thus the transmission of sound (sound leakage) from the engine compartment into the vehicle interior can be suppressed through the space between the body panel 1, the sound insulation section 15 and the periphery of the through hole 2. The sound insulation section 15 may also be formed as an umbrella shape or a flange shape extending from the outer surface of the second small-diameter tubular section 14.

[0035] Figure 4 This is a perspective view showing the umbrella-shaped sound insulation portion 15 of the first embodiment in a retracted state from its expanded state, and Figure 5 This is a cross-sectional view showing the umbrella-shaped sound insulation portion 15 of the first embodiment in a retracted state from an expanded state.

[0036] In this embodiment, the umbrella-shaped sound insulation section 15 is configured such that it can be folded back with the abutting side surface 15b facing the radially outer side of the cable ring body 11, using the fold-back section 22 as a base point. Of the front and rear surfaces of the sound insulation section 15, the abutting side surface 15b is the inner surface that abuts against the periphery of the through hole 2. When the abutting side surface 15b of the sound insulation section 15 is folded back with its radially outer side facing the cable ring body 11, the sound insulation section 15 has a pleated shape with multiple pleats 23 in the circumferential direction, and in this state, the outer diameter D1 of the sound insulation section 15 is smaller than the inner diameter D2 of the through hole 2 (D1 < D2). To make the folded position of the abutting side surface 15b of the sound insulation section 15 higher than the outer periphery 15a, the fold-back section 22 is positioned further away from the vehicle body panel 1 in the length direction of the cable ring body 11 than the outer periphery 15a of the sound insulation section 15. The fold-back section 22 also includes a circumferentially formed fold-back groove 24 in the abutting side surface 15b of the sound insulation section 15. That is, a fold-back groove 24 is provided in the abutting side surface 15b of the sound insulation section 15 to make a portion of the abutting side surface 15b thinner and to make it easier to fold in the direction toward the peripheral surface of the through hole 2. Simultaneously, the inner peripheral edge 15c, which serves as the connecting portion of the sound insulation section 15 that connects to the second expanded diameter tubular portion 21, is positioned lower than the outer peripheral edge 15a. When the cable ring 10 is attached to the periphery of the through hole 2, the inner peripheral edge 15c provided at the base end of the sound insulation section 15 can be partially located inside the through hole 2.

[0037] In this embodiment, an annular groove 25 is formed circumferentially between the outer surface of the second expanded diameter tubular portion 21 and the non-abutting side surface 15d of the sound insulation portion 15. Of the front and rear surfaces of the sound insulation portion 15, the non-abutting side surface 15d is the outer surface, which is the surface opposite to the inner surface (abutting side surface 15b). When the sound insulation portion 15 is formed extending from the outer surface of the second small diameter tubular portion 14, the annular groove 25 can be formed between the outer surface of the second small diameter tubular portion 14 and the non-abutting side surface 15d of the sound insulation portion 15.

[0038] In the example illustrated in this embodiment, although as Figure 1 and Figure 2 As shown, in the expanded state of the sound insulation section 15, there are no wrinkles. However, the shape of the expanded sound insulation section 15 is not limited to this structure, and some wrinkles may be present in the sound insulation section 15. Furthermore, as... Figure 1 and Figure 2 As shown, the perimeter of the outer periphery 15a of the sound insulation part 15 in its expanded state is... Figure 4 and Figure 5 The perimeter of the outer perimeter 15a of the sound insulation part 15 in the contracted state is approximately the same.

[0039] Figure 3The inner protector 30 shown is an annular component that supports the loop body 11 and is held at the periphery of the through hole 2. The inner protector 30 is made of a material with higher rigidity than the loop body 11, such as resin. Furthermore, the inner protector 30 is composed of a pair of components that are divided into two parts by an imaginary plane containing the central axis of the inner protector 30 itself, namely, a combination of a first inner component 31a and a second inner component 31b.

[0040] The internal protector 30 as a whole has a body 32 and a flange 33. The body 32 is an annular structure composed of multiple walls, and the flange 33 is an annular plate.

[0041] The main body 32 includes, for example, an outer peripheral wall 32a, an upper wall 32b, and an inner peripheral wall 32c. When the cable ring 10 is attached to the periphery of the through hole 2, the outer peripheral wall 32a is a wall that is opposite to the periphery of the through hole 2 along the planar direction of the vehicle body panel 1. The upper wall 32b is a wall that is continuous with the upper peripheral end and the outer peripheral end of the outer peripheral wall 32a and extends toward the inner peripheral side. The inner peripheral wall 32c is a wall that is continuous with the inner peripheral end of the upper wall 32b and is substantially parallel to the outer peripheral wall 32a.

[0042] The flange 33 protrudes radially inward from the lower periphery of the inner peripheral wall 32c. As described above, when the inner protector 30 is connected to the ring body 11, the flange 33 engages with the mating groove 16. Furthermore, the flange 33 has a protrusion 33a, which engages with the recess 18 when it engages with the mating groove 16 according to the position of the recess 18 pre-formed in the mating groove 16. Because the protrusion 33a engages with the recess 18, rotation of the inner protector 30 relative to the ring body 11 with respect to the central axis of the large-diameter tubular portion 12 can be suppressed. The protrusion 33a may also be formed in the respective flanges 33 of the first inner component 31a and the second inner component 31b. Simultaneously, the mating groove 16 of the ring body 11 may also have multiple recesses 18 corresponding to the respective protrusions 33a.

[0043] Here, when the internal protector 30 is a combination of a first internal component 31a and a second internal component 31b, the first internal component 31a and the second internal component 31b may have the same semi-circular shape. The first internal component 31a and the second internal component 31b also include two sidewalls 32d that circumferentially abut each other when combined. One sidewall 32d is provided with a hook 34, and the other sidewall 32d is provided with a groove 35. When the first internal component 31a and the second internal component 31b are combined, the hook 34 of the first internal component 31a engages in the groove 35 of the second internal component 31b, and the hook 34 of the second internal component 31b engages in the groove 35 of the first internal component 31a.

[0044] Instead of a connection mechanism in the form of hooks 34 and slots 35, the first internal component 31a and the second internal component 31b can also be connected via, for example, a hinge. Although the case of the internal protector 30 being divided into two internal components is described as an example, the internal protector 30 can be divided into three or more internal components.

[0045] Furthermore, the internal protector 30 also has a plurality of internal locks 40, which lock the body 32 to the periphery of the through hole 2 when a portion of the body 32 is inserted into the through hole 2. In this embodiment, the internal locks 40 are equally spaced at four locations along the circumference of the entire internal protector 30. That is, the internal locks 40 are located at two locations in the first internal component 31a and at two locations in the second internal component 31b. The number of internal locks 40 is not particularly limited and can be more than four.

[0046] Each internal lock 40 includes a locking hook 41.

[0047] The locking hook 41 is provided along the outer peripheral wall 32a of the main body 32 and elastically deforms in the direction connecting the inner and outer sides of the outer peripheral wall 32a. The locking hook 41 has a protrusion that contacts or engages with the periphery of the through hole 2. Here, the state in which the protrusion engages with the periphery of the through hole 2 refers to the state of the protrusion relative to the through hole 2 when the inner lock 40 locks the main body 32 to the periphery of the through hole 2, that is, when the grommets 10 are attached to the periphery of the through hole 2. The protrusion protrudes outward with its apex as the circumferential edge of the outer peripheral wall 32a and is generally located on the outer side of the outer periphery of the outer peripheral wall 32a. That is, the elastic deformation of the locking hook 41 is caused by the displacement of the protrusion due to contact with the periphery of the through hole 2. Furthermore, in the state in which the protrusion engages with the periphery of the through hole 2, when the periphery of the through hole 2 enters the lower end groove of the protrusion, the main body 32 maintains a fixed posture relative to the periphery of the through hole.

[0048] In the internal protector 30, since the internal lock 40 is provided in four positions in the circumferential direction, the protrusions of the four locking hooks 41 in total protrude in a radial direction based on the central axis of the body 32.

[0049] Next, the operation of the cable ring 10 will be described.

[0050] First, regarding the assembly of the grommets 10, the operator prepares a grommets body 11 with an electrical wire W arranged on its inner circumference, and attaches an internal protector 30 to the large-diameter tubular portion 12 of the grommets body 11. Here, the internal protector 30 is pre-divided into a first internal component 31a and a second internal component 31b. Therefore, after the electrical wire W has passed through the through-hole 2 provided in the vehicle body panel 1, the internal protector 30 can be easily attached to the large-diameter tubular portion 12 of the grommets body 11 by assembling the various internal components to clamp the large-diameter tubular portion 12 of the grommets body 11 from both sides. The above operation enables the grommets 10 to be attached to the electrical wire W.

[0051] Next, regarding the connection of the sling 10 to the periphery of the through hole 2, before the wire W passes through the through hole 2, the operator passes the wire W, which is exposed from the second small-diameter tubular portion 14 of the sling body 11, through the through hole 2. Then, the operator pushes the entire sling 10 towards the through hole 2 by inserting the body 32 of the inner protector 30 into the through hole 2. At this time, because the protrusion displaces upon contact with the periphery of the through hole 2, each locking hook 41 of the inner lock 40 elastically deforms, allowing the body 32 to be inserted into the through hole 2. When the body 32 is inserted to the fully inserted position, each locking hook 41 elastically returns to its original position to lock to the periphery of the through hole 2. When the inner protector 30 is in the aforementioned locked state, the lip 17 of the sling body 11 is tightly attached to the periphery surface of the through hole 2 provided on the surface of the vehicle body panel 1. That is, the vehicle body panel 1 is sandwiched between the protrusion on the inner protector 30 side and the lip 17 on the sling body 11 side. Therefore, the cable ring 10 is attached to the periphery of the through hole 2 to seal the through hole 2.

[0052] Furthermore, when the cable ring 10 is installed, the umbrella-shaped sound insulation part 15 is in a state where the abutting side surface 15b of the sound insulation part 15 is folded back with the folded-back part 22 as the base point and facing the radially outward side of the cable ring body 11 (see Figure 4 and Figure 5 The sound insulation part 15, in a state where its contact side surface 15b is folded back towards the radially outward side of the ring body 11, has a pleated shape with multiple pleats 23 in the circumferential direction, and in this state, the outer diameter D1 of the sound insulation part 15 is smaller than the inner diameter D2 of the through hole 2. Therefore, by means of... Figure 4 and Figure 5 With the sound insulation section 15 in a retracted state, the grommets 10 are inserted into the through-hole 2, suppressing interference between the sound insulation section 15 and the periphery of the through-hole 2, thereby allowing the grommets 10 to be easily inserted into the through-hole 2. After the grommets 10 are attached to the periphery of the through-hole 2 as described above, the sound insulation section 15 expands by bending in the direction of the vehicle body panel 1, thereby causing the outer periphery 15a of the sound insulation section 15 to fit tightly against the periphery surface of the through-hole 2 provided on the surface of the vehicle body panel 1.

[0053] Next, the effect of the cable ring 10 will be described.

[0054] According to a first aspect of this embodiment, the grommets 10 are provided with a grommets body 11 for holding an electrical wire W on its inner circumferential side, the wire W passing through a through hole 2 provided in a component to be mounted (vehicle panel 1). The grommets body 11 includes: a large-diameter tubular portion 12 locked to the periphery of the through hole 2, a first small-diameter tubular portion 13 disposed on one side of the opening of the through hole 2, and a second small-diameter tubular portion 14 disposed on the other side of the opening of the through hole 2. The grommets body 11 includes an umbrella-shaped sound insulation portion 15, which extends from the inner circumferential side of the grommets body 11 to the outer circumferential side and covers the opening of the through hole 2 from the other side. The sound insulation portion 15 is configured such that the inner surface (abutting side surface 15b) of the sound insulation portion 15 is folded back radially outward toward the grommets body 11 with a fold-back portion 22 as a base point. The sound insulation part 15, in which the inner surface (abutting side surface 15b) of the sound insulation part 15 is folded back in a manner facing the radially outer side of the cable ring body 11, has a pleated shape with a plurality of pleats 23 in the circumferential direction, and in this state the outer diameter D1 of the sound insulation part 15 is smaller than the inner diameter D2 of the through hole 2.

[0055] The sound insulation portion 15 is formed in the shape of an umbrella or a flange extending from the outer surface of the second expanded diameter tubular portion 21, and is located in the sound insulation portion 15 as... Figure 1 and Figure 2 In the expanded state shown, the outer diameter of the sound-insulating part 15 is larger than the inner diameter D2 of the through hole 2. Simultaneously, in the state where the abutting surface 15b of the sound-insulating part 15 is folded back radially outward toward the ring body 11, the sound-insulating part 15 has a pleated shape with multiple pleats 23 in the circumferential direction, and in this state, the outer diameter D1 of the sound-insulating part 15 is smaller than the inner diameter D2 of the through hole 2. Therefore, by... Figure 4 and Figure 5 When the sound insulation part 15 is contracted, the cable ring 10 is inserted into the through hole 22, which suppresses the interference between the sound insulation part 15 and the periphery of the through hole 2, thereby making it easy to insert the cable ring 10 into the through hole 2.

[0056] As described above, this embodiment provides a cable loop 10 that can suppress interference with the vehicle body panel 1 when it is attached to the periphery of the through hole 2, and thus improves the operability of attaching the cable loop 10 to the periphery of the through hole 2.

[0057] In the cable loop 10 according to the second aspect of this embodiment, the folded-back portion 22 is provided in the length direction of the cable loop body 11 at a position further away from the component (vehicle panel 1) than the outer periphery 15a of the sound insulation portion 15.

[0058] By folding the abutting surface 15b of the sound insulation part 15 at a position higher than the outer periphery 15a, it is possible to make the sound insulation part 15 less likely to be folded outwards. Figure 1 and Figure 2 The expanded state shown is restored to as follows Figure 4 and Figure 5 The sound insulation section 15 is in the contracted state shown. Furthermore, in the expanded state, sufficient force can be obtained to press the vehicle body panel 1 with the outer periphery 15a of the sound insulation section 15, thereby enabling the outer periphery 15a of the sound insulation section 15 to adhere tightly to the peripheral surface of the through hole 2.

[0059] In the grommets 10 according to the third aspect of this embodiment, an enlarged-diameter tubular portion (second enlarged-diameter tubular portion 21) is disposed between a second small-diameter tubular portion 14 and a large-diameter tubular portion 12, and a sound-insulating portion 15 is formed extending from the outer surface of the second small-diameter tubular portion 14 or the enlarged-diameter tubular portion (second enlarged-diameter tubular portion 21). An annular groove 25 extending circumferentially along the grommets body 11 is formed between the outer surface of the second small-diameter tubular portion 14 or the enlarged-diameter tubular portion (second enlarged-diameter tubular portion 21) and the outer peripheral surface (non-abutting side surface 15d) of the sound-insulating portion 15.

[0060] An annular groove 25 is provided between the outer surface of the second small-diameter tubular portion 14 or the second expanded-diameter tubular portion 21 and the non-contacting side surface 15d of the sound insulation portion 15. Therefore, when the sound insulation portion 15 flips from a contracted state to an expanded state, the portion at the base of the sound insulation portion 15 that is to become elliptical can be released through the annular groove 25, thereby reducing the force exerted when the sound insulation portion 15 flips. Furthermore, even when the internal wire W moves with the cable ring 10 attached to it, the movement of the wire W is difficult to transmit throughout the entire sound insulation portion 15, making it difficult for the sound insulation portion 15 to return from the expanded state to the contracted state.

[0061] The wire harness according to this embodiment is provided with a cable loop 10 according to any one of the first to third aspects described above.

[0062] This embodiment enables the provision of a wiring harness that suppresses interference with the vehicle body panel 1 when the cable loop 10 is attached to the periphery of the through hole 2, and thus improves operability when the cable loop 10 is attached to the periphery of the through hole 2.

[0063] [Second Embodiment]

[0064] Next, the cable loop 10A according to the second embodiment will be described. It should be noted that components that are substantially the same as those components of the cable loop 10 described above are identified by the same reference numerals, and their description is omitted.

[0065] Figure 6 This is a perspective view of the cable loop 10A according to the second embodiment, and Figure 7 This is a cross-sectional view of the cable ring 10A according to the second embodiment. Figure 8 This is an exploded view of the 10A cable loop. Furthermore, Figure 9This is a perspective view showing the umbrella-shaped sound insulation portion 15 in the second embodiment in a retracted state from an expanded state, and Figure 10 This is a cross-sectional view showing the umbrella-shaped sound insulation portion 15 of the second embodiment in a retracted state from an expanded state.

[0066] In the grommets 10A according to this embodiment, a closing portion 26 is provided on the outer periphery 15a of the sound-insulating portion 15, so as to ensure that the sound-insulating portion 15 is closed as follows: Figure 6 and Figure 7 The gap between the vehicle body panel 1 and the outer periphery 15a of the sound insulation section 15 is closed when the umbrella-shaped sound insulation section 15 is expanded, as shown. In this embodiment, the sound insulation section 15 has a small number of pleats, and a plurality of closing portions 26 are provided on the circumferential direction of the grommet body 11A relative to the outer periphery 15a of the sound insulation section 15 to close any gap that may occur between the vehicle body panel 1 and the outer periphery 15a of the sound insulation section 15. Furthermore, the closing portions 26 may be provided in the ridges of the pleats 23 in the sound insulation section 15. According to this embodiment, the grommet 10A can improve the sound insulation performance of the sound insulation section 15 by closing the gap between the vehicle body panel 1 and the outer periphery 15a of the sound insulation section 15 when the umbrella-shaped sound insulation section 15 is expanded by the closing portions 26.

[0067] Furthermore, in the grommets 10A according to this embodiment, a groove 27 extending radially in the grommets body 11A is provided on the non-contact side surface 15d near the outer periphery 15a of the sound insulation portion 15. In this embodiment, a plurality of grooves 27 are provided at intervals in the circumferential direction of the grommets body 11A relative to the outer periphery 15a of the sound insulation portion 15 where the closure portion 26 is provided. Furthermore, the grooves 27 can be provided in the ridges of the folds 23 in the sound insulation portion 15. By providing grooves 27 in the non-contact side surface 15d of the sound insulation portion 15, the grommets 10A according to this embodiment can improve the flexibility of the umbrella-shaped sound insulation portion 15, thereby minimizing any gaps that may occur between the vehicle body panel 1 and the grommets 10A.

[0068] Furthermore, in the grommets 10A according to this embodiment, ribs 28 extending radially along the grommets 11A are provided on the non-abutting side surface 15d of the sound-insulating portion 15. In this embodiment, a plurality of ribs 28 are provided at intervals in the circumferential direction on the non-abutting side surface 15d of the sound-insulating portion 15. Furthermore, the ribs 28 can be provided in the ridges of the pleats 23 in the sound-insulating portion 15. By providing ribs 28 on the non-abutting side surface 15d of the sound-insulating portion 15, the rigidity of the umbrella-shaped sound-insulating portion 15 can be improved in the grommets 10A according to this embodiment, thereby preventing the sound-insulating portion 15 from being recessed towards the through hole 2 when it expands.

[0069] Furthermore, in the grommets 10A according to this embodiment, the fold-back portion 22 includes a first fold-back groove 24 and a second fold-back groove 29. The first fold-back groove 24 is formed circumferentially in the contact side surface 15b of the sound insulation portion 15, and the second fold-back groove 29 is formed circumferentially in the non-contact side surface 15d of the sound insulation portion 15. That is, the first fold-back groove 24 is provided in the contact side surface 15b of the sound insulation portion 15 to thin a portion of the contact side surface 15b of the sound insulation portion 15, and to make it easier to fold in the direction toward the peripheral surface of the through hole 2. At the same time, the second fold-back groove 29 is provided in the non-contact side surface 15d of the sound insulation portion 15 to thin a portion of the non-contact side surface 15d of the sound insulation portion 15, and to make it easier to fold in the direction toward the peripheral surface of the through hole 2. Since the fold-back portion 22 includes a first fold-back groove 24 on the contact side surface 15b of the sound insulation portion 15 and a second fold-back groove 29 on the non-contact side surface 15d of the sound insulation portion 15, the grommets 10A according to this embodiment can fix the base point when the sound insulation portion 15 is folded back.

[0070] like Figure 8 As shown, a rib 36 is provided on the outer peripheral wall 32a of the body 32A of the inner protector 30A to prevent the inner protector 30A from being attached to the grommets 11A in an inclined state. In the grommets 10A according to this embodiment, a pair of ribs 36 and 36 are formed on the outer peripheral wall 32a of the body 32A of the inner protector 30A, with locking hooks 41 disposed therebetween. Furthermore, a rib 36 is also formed on the outer peripheral wall 32a of the body 32A of the inner protector 30A at the midpoint between adjacent locking hooks 41 in the circumferential direction. Since the inner protector 30A has ribs 36 for preventing tilting, the grommets 10A according to this embodiment can reduce the load generated and applied to the locking hooks 41 when the inner peripheral surface of the through hole 2 abuts against the ribs 36.

[0071] Furthermore, the large-diameter tubular portion 12 of the grommet body 11A and the main body 32A of the inner protector 30A are respectively provided with positioning protrusions 18a and 37, which prevent the inner protector 30A from being incorrectly oriented into the grommet body 11A. In the grommet 10A according to this embodiment, the positioning protrusion 37 on the inner protector 30A side is formed as a semicircle and is provided on the upper surface of the end of the protrusion 33a. On the other hand, the positioning protrusion 18a on the grommet body 11A side is formed as a semicircle and is provided near the recess 18 in the large-diameter tubular portion 12 of the grommet body 11A. In the grommet 10A according to this embodiment, the grommet body 11A and the inner protector 30A respectively include positioning protrusions 18a and 37 configured to prevent incorrect assembly. This construction allows for the prevention of the internal protector 30A from being incorrectly oriented relative to the length direction (vertical direction) of the sling body 11A during installation. Furthermore, by visually confirming that the positioning protrusion 37 on the internal protector 30A side abuts against the positioning protrusion 18a on the sling body 11A side, incorrect installation of the internal protector 30A can be prevented.

[0072] As in the case of the aforementioned grommets 10, Figures 6 to 10 The cable ring 10A shown can suppress interference with the vehicle body panel 1 when the cable ring 10A is attached to the periphery of the through hole 2, thereby improving the operability when the cable ring 10A is attached to the periphery of the through hole 2.

[0073] [Third Embodiment]

[0074] Next, the cable loop 10B according to the third embodiment will be described. It should be noted that components that are substantially the same as those components of the cable loops 10 and 10A described above are identified by the same reference numerals, and their description is omitted.

[0075] Figure 11 This is a perspective view of the cable loop 10B according to the third embodiment, and Figure 12 This is a cross-sectional view of the cable loop 10B according to the third embodiment. Furthermore, Figure 13 This is a perspective view showing the umbrella-shaped sound insulation portion 15 in the third embodiment in a retracted state from an expanded state, and Figure 14 This is a cross-sectional view showing the umbrella-shaped sound insulation portion 15 of the third embodiment in a state of retraction from an expanded state.

[0076] like Figures 11 to 14 As shown, according to this embodiment, the grommets 10B do not include an internal protector, and the grommets body 11B is directly attached to the periphery of the through hole 2. An annular wall 12b is formed along the circumference of the grommets body 11B on the outer periphery of the large-diameter tubular portion 12 of the grommets body 11B.

[0077] As in the cases of 10 and 10A described above, Figures 11 to 14 The cable ring 10B shown can suppress interference with the vehicle body panel 1 when the cable ring 10B is attached to the periphery of the through hole 2, thereby improving the operability when the cable ring 10B is attached to the periphery of the through hole 2.

[0078] Although the present invention has been described above with reference to embodiments, the present invention is not limited thereto. Within the scope of the claims, the construction of the components can be replaced with any construction having similar functions.

Claims

1. A grommets, comprising a grommets body for retaining, on its inner circumferential side, a wire passing through a through-hole provided in a connected component, the grommets body comprising: A large-diameter tubular portion, which is locked to the periphery of the through hole; A first small-diameter tubular portion is arranged on one side of the opening of the through hole; A second small-diameter tubular portion is arranged on the other side of the opening of the through hole; as well as An umbrella-shaped sound-insulating portion extends from the inner circumference of the ring body to the outer circumference and covers the opening of the through hole from the other side, wherein... The sound insulation section is configured such that it can fold back from the folded-back section with its inner surface facing radially outward toward the loop body, and The sound insulation part, with its inner surface folded back towards the radially outward side of the ring body, has a pleated shape with multiple pleats in the circumferential direction, and in this state, the outer diameter of the sound insulation part is smaller than the inner diameter of the through hole. The foldback portion is located further away from the component being assembled than the outer periphery of the sound insulation portion in the length direction of the grommets.

2. The cable loop according to claim 1, wherein, An enlarged-diameter tubular section is provided between the second small-diameter tubular section and the large-diameter tubular section. The sound insulation portion is formed by extending from the outer peripheral surface of the second small-diameter tubular portion or the outer surface of the enlarged-diameter tubular portion, and An annular groove extending circumferentially along the body of the cable ring is formed between the outer peripheral surface of the second small-diameter tubular portion or the outer surface of the expanded-diameter tubular portion and the outer surface of the sound insulation portion.

3. The cable loop according to claim 1 or 2, wherein, The outer periphery of the sound insulation part is provided with a sealing part to seal the gap between the mounted component and the outer periphery of the sound insulation part.

4. The cable loop according to claim 1 or 2, wherein, A groove extending radially from the cable ring body is provided on the outer surface near the outer periphery of the sound insulation part.

5. The cable loop according to claim 1 or 2, wherein, Ribs extending radially from the cable ring body are provided on the outer surface of the sound insulation part.

6. A wire harness comprising a loop according to claim 1 or 2.

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