JP7426785B2 - wire harness - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wire harness, and particularly to a wire harness that is routed in a portion of an automobile where liquid such as water droplets may adhere.

Conventionally, a wire harness has been proposed in which, for example, a signal wire for an automobile's ABS (anti-lock brake system) and a power supply wire for operating an electric parking brake are coated with a common sheath and integrated ( For example, see Patent Document 1).

International Publication No. 2014/103499

However, in the wire harness described in Patent Document 1, there is a possibility that liquid such as water may infiltrate into the sheath from the end of the sheath. For example, if liquid infiltrates into the sheath from the end of the sheath and the wire harness is bent while the liquid is frozen, there is a risk that the signal wire and the power wire may be damaged.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a wire harness that can suppress liquid from entering the sheath from the end of the sheath.

In order to solve the above problems, the present invention provides a cable having an electric wire and a sheath covering the electric wire, and a seal provided in contact with the outer periphery of the electric wire exposed from an end of the sheath. a cylindrical member having a holding member that holds the sealing member, a first inner circumferential surface that elastically contacts the outer circumferential surface of the sheath, and a second inner circumferential surface that elastically contacts the outer circumferential surface of the holding member. a cylindrical member made of an elastic body, and the electric wire extends from the holding member.

According to the wire harness according to the present invention, it is possible to suppress liquid from entering the sheath from the end of the sheath.

FIG. 1 is a perspective view showing a wire harness according to an embodiment of the present invention. 2 is a sectional view taken along line XX' in FIG. 1. FIG. It is a perspective view showing a grommet. 4 is a vertical cross-sectional view of the grommet shown in FIG. 3. FIG. It is an exploded view showing a holder. It is a perspective view showing a wire seal. It is a figure which shows the intermediate body formed in the middle of the manufacturing process of a wire harness. FIG. 3 is an assembly diagram of a holder with a wire seal attached thereto. FIG. 7 is a sectional view of a main part of a wire harness according to a modified example of the present invention.

[Embodiment]
FIG. 1 is a perspective view showing a wire harness according to an embodiment of the invention. FIG. 2 is a sectional view taken along line XX' in FIG. The wire harness 1 according to the embodiment of the present invention is used, for example, in an electric parking brake device or an electric brake device of an automobile, and more specifically, in an electric parking brake device provided corresponding to each wheel of an automobile. It supplies an operating current to the brake device for its operation, and also transmits a signal from a rotational speed sensor for measuring the rotational speed of a wheel (for example, a signal used in an anti-lock braking system (ABS)). .

As shown in FIG. 1, this wire harness 1 includes electric wires (a first core wire 2 and a second core wire 3), a sheath 4 that covers the electric wires, a grommet 5 as a cylindrical member, and a holding member. The wire seal 7 is configured to include a holder 6 as a seal member, and a wire seal 7 as a seal member.

The sheath 4 covers the first core wire 2 and the second core wire 3. The first core wire 2 and the second core wire 3 are exposed from the end 4a of the sheath 4. Further, the first core wire 2 and the second core wire 3 extend from the holder 6. The wire seal 7 is inserted into insertion holes 610, 611 formed in the holder 6, and performs water stoppage between these insertion holes 610, 611 and the first core wire 2 and the second core wire 3, respectively. The wire seal 7 is provided in contact with the outer circumferences of the first core wire 2 and the second core wire 3 exposed from the end portion 4a of the sheath 4.

Holder 6 holds wire seal 7. The grommet 5 holds one end 4a (hereinafter also simply referred to as "one end 4a") of the sheath 4, and also performs a water stop with this one end 4a. Here, a cable in which the first core wire 2 and the second core wire 3 are covered with a sheath 4 is also referred to as a "cable." The details of each component will be explained below.

(First core wire 2)
The first core line 2 is, for example, a power line used to supply operating current to an electric parking brake device. The first core wire 2 includes a pair of first insulated wires 21, 21. Further, the pair of first insulated wires 21 and 21 each include, for example, a first conductor wire 211 made of copper strands twisted together, and a first conductor wire 211 made of polyethylene that covers the first conductor wire 211. 1 insulator 212 .

(Second core wire 3)
The second core line 3 is, for example, a signal line used to transmit a signal from a rotational speed sensor. The second core wire 3 includes a pair of second insulated wires 31, 31. Further, the pair of second insulated wires 31, 31 each include, for example, a second conductor wire 311 made of copper strands twisted together, and a second conductor wire 311 made of polyethylene that covers the second conductor wire 311. 2 insulators 312. The second insulated wire 31 has a smaller outer diameter than the first insulated wire 21 and is formed thinner than the first insulated wire 21 .

(Sheath 4)
The sheath 4 has a cylindrical shape and covers the first core wire 2 and the second core wire 3 all at once. The sheath 4 is made of, for example, urethane-based resin such as thermoplastic urethane. Note that a fibrous interposition (not shown) may be arranged inside the sheath 4 between the inner surface of the sheath 4 and the first core wire 2 and the second core wire 3.

The first core wire 2 and the second core wire 3 are led out from one end 4a of the sheath 4 and exposed from this one end 4a. Further, one end 4a of the sheath 4 is held by the grommet 5, and the other end (not shown, hereinafter referred to as "other end") is held by a case of a control device (not shown).

(Grommet 5)
FIG. 3 is a perspective view showing the grommet 5. FIG. 4 is a longitudinal cross-sectional view of the grommet 5 shown in FIG. 3. The grommet 5 is made of, for example, a rubber-based elastic material such as ethylene propylene diene rubber (EPDM).

The grommet 5 includes a first accommodating portion 51 that accommodates one end 4a of the sheath 4 and has a first inner circumferential surface 51a that comes into elastic contact with an outer circumferential surface 4aa of the one end 4a, and a first accommodating portion 51 that is led out from the one end 4a of the sheath 4. A second accommodating part 52 that accommodates the first core wire 2 and second core wire 3 that have been exposed, and a main body part 61 that accommodates the main body part 61 of the holder 6 that holds the plurality of wire seals 7. It is integrally provided with a third accommodating portion 53 having a second inner circumferential surface 53a that comes into elastic contact with the outer circumferential surface 61a of the third accommodating portion 53. Here, "elastic contact" refers to contact due to the elastic force of the rubber material.

The first accommodating portion 51 is located at one end, and the third accommodating portion 53 is located at the other end. The second accommodating part 52 is located between the first accommodating part 51 and the third accommodating part 53 and is continuously connected to the first accommodating part 51 and the third accommodating part 53. . In other words, the first accommodating section 51 and the third accommodating section 53 are spaced apart from each other by the second accommodating section 52 .

The first accommodating portion 51 has a cylindrical shape in which the inner diameter r ₁ and the outer diameter R ₁ of the first accommodating portion 51 are uniform throughout the axial direction. Moreover, the third accommodating portion 53 has a cylindrical shape. That is, the inner diameter r ₃ and outer diameter R ₃ of the third accommodating portion 53 are uniform throughout the axial direction. The inner diameter r ₃ and the outer diameter R ₃ of the third accommodating portion 53 are larger than the inner diameter r _{1 and the outer diameter R 1 of} the first accommodating portion 51, respectively (r ₁ <r ₃ , R ₁ <R ₃ ).

The second accommodating part 52 includes a first cylindrical part 521 connected to the first accommodating part 51, a second cylindrical part 522 connected to the third accommodating part 53, and It is located between the two cylindrical parts 522 and integrally has an intermediate part 523 having a tapered shape whose diameter increases from the first accommodating part 51 side to the third accommodating part 53 side.

In other words, the first accommodating part 51 is a small diameter cylindrical part having a first inner peripheral surface 51a that comes into elastic contact with the outer peripheral surface 4aa of the one end 4a of the sheath 4, and the third accommodating part 53 is It is a large diameter cylindrical portion having a second inner circumferential surface 53a that comes into elastic contact with the outer circumferential surface 61a of the main body portion 61, and the second accommodating portion 52 connects the first accommodating portion 51 and the third accommodating portion 53. This is the connecting part. The details of the functions of each storage section will be described below.

(1) First housing section 51
The inner diameter r ₁ of the first accommodating portion 51 is smaller than the outer diameter of the sheath 4 in the natural state before accommodating the sheath 4 . Therefore, the sheath 4 is accommodated in the first accommodating portion 51 with the first accommodating portion 51 expanded in diameter by, for example, air.

After the sheath 4 is accommodated in the first accommodating portion 51, the first accommodating portion 51 is contracted in diameter from the expanded state and comes into elastic contact with the outer circumferential surface 4aa of the one end portion 4a of the sheath 4. As a result, a tightening force (ie, "binding force") from the first accommodating portion 51 acts on the sheath 4 . Due to this binding force, the outer circumferential surface 4aa of the sheath 4 and the first inner circumferential surface 51a are brought into close contact with each other, and the sheath 4 is moved from the first accommodating part 51 side to the second accommodating part 52 side (from the left side to the right side in FIG. 1). This makes it possible to suppress the infiltration of liquid.

(2) Second housing section 52
The inner diameter r ₂₁ of the first cylindrical portion 521 of the second accommodating portion 52 is smaller than the inner diameter r ₁ of the first accommodating portion 51 (r ₂₁ <r ₁ ). That is, between the first accommodating part 51 and the second accommodating part 52, there is a part that is in contact with the distal end surface 4ab of the one end 4a of the sheath 4 (hereinafter also simply referred to as "the end surface 4ab of the sheath 4"). A first stepped portion 51b is formed that functions as a stopper for positioning the sheath 4 within the first housing portion 51.

Further, the inner diameter r ₂₂ of the second cylindrical portion 522 of the second accommodating portion 52 is smaller than the inner diameter r ₃ of the third accommodating portion 53 (r ₂₂ <r ₃ ). That is, there is a gap between the third accommodating part 53 and the second accommodating part 52 that is in contact with the bottom surface 61b (see FIG. 5) of the main body part 61 to align the main body part 61 within the third accommodating part 53. A second stepped portion 53b is formed which functions as a stopper for performing this step.

Further, the length L ₂ of the intermediate portion 523 in the axial direction is preferably 1 mm or more and 20 mm or less. In other words, when the sheath 4 and the main body portion 61 of the holder 6 are housed in the grommet 5, the sheath 4 and the holder 6 are spaced apart from each other by 1 mm or more and 20 mm or less in the longitudinal direction of the sheath 4. If the sheath 4 and the holder 6 are brought too close to each other, the first core wire 2 and the second core wire 3 led out from one end 4a of the sheath 4 will be inserted into the holder 6 at an angle of more than a certain angle. This is because there is a risk that a gap may be created between the holder 6 and the holder 6, resulting in a decrease in water-stopping properties.

(3) Third storage section 53
The inner diameter r ₃ of the third accommodating portion 53 is smaller than the outer diameter of the main body portion 61 of the holder 6 in its natural state before the main body portion 61 is accommodated therein. Therefore, the main body portion 61 is accommodated in the third accommodating portion 53 in a state in which the third accommodating portion 53 is expanded in diameter by, for example, air.

After the main body part 61 is accommodated in the third accommodating part 53, the third accommodating part 53 is contracted in diameter from the expanded state and comes into elastic contact with the outer circumferential surface 61a of the main body part 61. As a result, a binding force from the third housing section 53 acts on the main body section 61 . Due to this binding force, the second inner circumferential surface 53a and the outer circumferential surface 61a of the main body part 61 come into close contact with each other, and the gas enters into the grommet 5 from between the second inner circumferential surface 53a and the outer circumferential surface 61a of the main body part 61. This makes it possible to suppress the

Further, the length L ₃ of the third accommodating portion 53 in the axial direction (that is, the height of the second inner circumferential surface 53a) is preferably 5 mm or more and 30 mm or less. When the length L ₃ of the third accommodating part 53 is less than 5 mm, the binding force from the third accommodating part 53 is not sufficiently obtained, and the inner circumferential surface 53a of the third accommodating part 53 (i.e., the second There is a possibility that the expected water-stopping property may not be obtained between the inner peripheral surface 53a) of the main body 61 and the outer peripheral surface 61a of the main body 61. Further, if the length L ₃ of the third accommodating portion 53 exceeds 30 mm, the binding force of the third accommodating portion 53 may be too strong, making it difficult to accommodate the main body portion 61 .

(Holder 6)
FIG. 5 is an exploded view showing the holder 6. As shown in FIG. The holder 6 is a holding member that holds the wire seal 7. As shown in FIG. 5, the holder 6 includes a main body 61 having a cylindrical shape and a lid 62 having a disk shape and placed over the main body 61. As shown in FIG. The main body portion 61 has a predetermined height (in FIG. 2, the length in the axial direction) H. The height H of the main body portion 61 is greater than the length L ₃ of the third accommodating portion 53 described above (that is, H>L ₃ ). Preferably, the height from the bottom surface 61b of the main body portion 61 to the lower end of the engagement protrusion 613, which will be described later, is greater than the length _L3 of the third accommodating portion 53. This is to ensure that the engagement protrusion 613 is located outside the grommet 5 even when the holder 6 is accommodated in the third accommodating portion 53 to the maximum extent possible.

Four insertion holes 610 and 611 are formed in the main body part 61, passing through from the top surface to the bottom surface 61b along the axial direction of the main body part 61. Two of these four insertion holes 610 have a larger diameter than the remaining two insertion holes 611. The two large-diameter insertion holes 610 (hereinafter also referred to as "first insertion holes 610") have the same diameter. The two small-diameter insertion holes 611 (hereinafter also referred to as "second insertion holes 611") have the same diameter. Note that here, "same" does not only mean completely the same, but also includes some errors. A slight error refers to an error of several percent (for example, 5%) or less. Hereinafter, when "same" is written, the same applies.

Wire seals 7 are inserted into these four insertion holes 610 and 611, respectively. Further, the four insertion holes 610 and 611 are arranged to accommodate the first core wire 2 and the second core wire 3 in a cross-sectional view of the wire harness 1 when the main body portion 61 is housed in the third housing portion 53. arranged to correspond to the position.

The main body 61 also includes a pair of protruding engagement protrusions 613 provided on the outer circumferential surface 61a at positions that protrude outward in the radial direction of the main body 61 and face each other across the central axis of the main body 61. 613. The engagement protrusion 613 is located at a position in the height direction of the main body 61 where it is disposed outside the grommet 5 with the main body 61 housed in the third accommodating part 53, that is, at a height from the bottom surface 61b. It is provided at a position higher than the length _L3 of the third accommodating portion 53 in the axial direction. Note that the number of engagement protrusions 613 is not limited to two, and may be three or more.

The lid 62 is a disc-shaped member that covers the entire upper surface of the main body 61 . The lid body 62 has a function of suppressing the wire seal 7 from separating from the main body portion 61 (for example, in the right direction in FIG. 2). The lid body 62 includes a pair of engaging portions 620 that engage with a pair of engaging protrusions 613, 613 of the main body portion 61, respectively, when the lid body 62 is placed over the main body portion 61. The lid body 62 is formed with insertion holes 622 and 623 through which the first core wire 2 and the second core wire 3 are inserted, respectively. The first core wire 2 and the second core wire 3 extend from the holder 6 through the insertion holes 622 and 623.

The pair of engaging portions 620 are provided at positions facing each other with the central axis of the lid 62 interposed therebetween. Each engagement portion 620 has an annular engagement piece 621 that extends downward in the axial direction at the outer edge of the lid 62 and forms an engagement hole 620a in the center. The engagement hole 620a and the engagement protrusion 613 are engaged to fix the lid 62 to the main body 61 (see FIG. 8).

(Wire seal 7)
FIG. 6 is a perspective view showing the wire seal 7. The wire seal 7 is made of a rubber material such as silicone rubber, for example. As shown in FIG. 6, the wire seal 7 includes a pair (two) of large-diameter first wire seals 71 and a pair (two) of small-diameter second wire seals 72. There is.

The first wire seal 71 has a cylindrical shape. Also, inside the first wire seal 71, when inserting the first core wire 2 into the first wire seal 71, there is a friction between the first core wire 2 and the first wire seal 71. In order to reduce the force, an uneven structure is formed in which unevenness is repeated in the radial direction along the axial direction of the first wire seal 71.

The first wire seal 71 is inserted into the first insertion hole 610 described above. Therefore, the outer circumferential surface 71a of the first wire seal 71 has an uneven structure that repeats unevenness in the radial direction along the axial direction of the first wire seal 71. When inserting the first wire seal 71 into the first insertion hole 610 of the main body part 61, the area of the outer circumferential surface 71a that contacts the inner wall 610a of the first insertion hole 610 is reduced so that the inner wall 610a and the outer circumferential surface 71a This is to reduce the frictional force acting between the first wire seal 71 and the first wire seal 71 to make it easier to insert the first wire seal 71 into the first insertion hole 610 of the main body part 61.

In the natural state before the first wire seal 71 is inserted into the first insertion hole 610, the outer diameter _D1 of the first wire seal 71 is larger than the inner diameter _φ1 of the first insertion hole 610. Therefore, the first wire seal 71 is inserted into the first insertion hole 610 in a reduced diameter state.

After the first wire seal 71 is inserted into the first insertion hole 610, the diameter of the first wire seal 71 is expanded from the reduced diameter state and comes into elastic contact with the inner wall 610a of the first insertion hole 610. . As a result, a binding force from the first insertion hole 610 acts on the first wire seal 71 . Due to this binding force, the outer circumferential surface 71a of the first wire seal 71 and the inner wall 610a of the first insertion hole 610 are brought into close contact, and the outer circumferential surface 71a of the first wire seal 71 and the inner wall of the first insertion hole 610 are brought into close contact with each other. It becomes possible to suppress intrusion of liquid from the space between 610a and 610a.

Further, the first core wire 2 is inserted through the first through hole 710. In the natural state before the first core wire 2 is inserted into the first through hole 710, the inner diameter _d1 of the first wire seal 71 is smaller than the outer diameter of the first core wire 2.

After the first core wire 2 is inserted into the first through hole 710, the diameter of the first through hole 710 is contracted from the expanded state and elastically contacts the outer peripheral surface 21a of the first insulated wire 21. come into contact with As a result, a binding force from the first wire seal 71 acts on the first core wire 2 . Due to this binding force, the outer circumferential surface 21a of the first insulated wire 21 and the inner wall 710a of the first through hole 710 are brought into close contact, and the outer circumferential surface 21a of the first insulated wire 21 and the inner wall of the first through hole 710 are brought into close contact with each other. It becomes possible to suppress intrusion of liquid from between 710a and 710a.

The second wire seal 72 has a cylindrical shape. In addition, inside the second wire seal 72, when inserting the second core wire 3 into the second wire seal 72, a friction force between the second core wire 3 and the wire seal 72 is reduced. In order to do this, a concavo-convex structure is formed that repeats concavities and convexities in the radial direction along the axial direction of the second wire seal 72.

The second wire seal 72 is inserted into the second insertion hole 611 described above. Therefore, the outer circumferential surface 72a of the second wire seal 72 has an uneven structure that repeats unevenness in the radial direction along the axial direction of the second wire seal 72, similarly to the outer circumferential surface 71a of the first wire seal 71. It is formed. This is to facilitate insertion of the second wire seal 72 into the second insertion hole 611 of the main body portion 61.

In the natural state before the second wire seal 72 is inserted into the second insertion hole 611, the outer diameter _D2 of the second wire seal 72 is larger than the inner diameter _φ2 of the second insertion hole 611. Therefore, the second wire seal 72 is inserted into the second insertion hole 611 in a reduced diameter state.

After the second wire seal 72 is inserted into the second insertion hole 611, the diameter of the second wire seal 72 is expanded from the reduced diameter state and comes into elastic contact with the inner wall 611a of the second insertion hole 611. . As a result, a binding force from the second insertion hole 611 acts on the second wire seal 72. Due to this binding force, the outer circumferential surface 72a of the second wire seal 72 and the inner wall 611a of the second insertion hole 611 are brought into close contact, and the outer circumferential surface 72a of the second wire seal 72 and the inner wall of the second insertion hole 611 are brought into close contact with each other. It becomes possible to suppress intrusion of liquid from between 611a and 611a.

Further, the second core wire 3 is inserted through the second through hole 720. In the natural state before the second core wire 3 is inserted into the second through hole 720, the inner diameter _d2 of the second wire seal 72 is smaller than the outer diameter of the second core wire 3. Therefore, the second core wire 3 is inserted into the second through hole 720 in a state where the diameter of the second through hole 720 is expanded by, for example, air.

After the second core wire 3 is inserted into the second through hole 720, the diameter of the second through hole 720 is contracted from the expanded state and elastically contacts the outer peripheral surface 31a of the second insulated wire 31. come into contact with As a result, a binding force from the second wire seal 72 acts on the second core wire 3. Due to this binding force, the outer circumferential surface 31a of the second insulated wire 31 and the inner wall 720a of the second through hole 720 are brought into close contact, and the outer circumferential surface 31a of the second insulated wire 31 and the inner wall of the second through hole 720 are brought into close contact with each other. It becomes possible to suppress intrusion of liquid from between 720a and 720a.

(Manufacturing process of wire harness 1)
FIG. 7 is a diagram showing an intermediate body formed during the manufacturing process of the wire harness 1. FIG. 8 is an assembled view of the holder 6 with the wire seal 7 attached. First, as shown in FIG. 7, the grommet 5 is inserted into the first core wire 2 and the second core wire 3 led out from one end 4a of the sheath 4, and the one end 4a is accommodated to form an intermediate body. 1A is formed. At this time, as described above, one end portion 4a of the sheath 4 is accommodated in the grommet 5 with the first accommodating portion 51 expanded in diameter.

Next, as shown in FIG. 8, the wire seal 7 is inserted into the insertion holes 610, 611 of the main body 61 of the holder 6. At this time, as described above, the wire seal 7 is inserted into the insertion holes 610 and 611 in a reduced diameter state. Next, the lid 62 is placed over the main body 61 with the wire seal 7 attached. At this time, the holder 6 is assembled by engaging the engaging portion 620 of the lid body 62 and the engaging protrusion 613 of the main body portion 61.

Finally, the holder 6 containing the wire seal 7 shown in FIG. 8 is accommodated in the third accommodating portion 53 of the grommet 5 of the intermediate body 1A shown in FIG. At this time, as described above, the main body part 61 of the holder 6 is accommodated in the third accommodating part 53 with its diameter expanded, and the first core wire 2 and the The core wire 3 of No. 2 is inserted through a wire seal 7 of a corresponding size. In the manner described above, the wire harness 1 as shown in FIG. 1 is completed. Note that the wire harness 1 may be attached to a branch cover (not shown) in order to pull out the core wire in a desired direction.

(Actions and effects of embodiments)
According to the embodiment described above, the cylindrical body has the first inner circumferential surface 51a that contacts the outer circumferential surface 4aa of the sheath 4, and the second inner circumferential surface 53a that contacts the outer circumferential surface 61a of the holder 6. A grommet 5 made of an elastic body is provided. This makes it possible to suppress liquid from entering the sheath 4 from between the outer circumferential surface 4aa of the sheath 4 and the first inner circumferential surface 51a (through the inside of the grommet 5), and also to prevent It becomes possible to suppress liquid that enters into the sheath 4 from between the surface 61a and the second inner circumferential surface 53a (through the grommet 5). Further, in this embodiment, the wire seal 7 and the inner peripheral surface of the insertion hole of the holder 6 are in contact with each other. As a result, the space between the first core wire 2 and the second core wire 3 and the insertion hole is sealed by the wire seal 7, and the space between the first core wire 2 and the second core wire 3 and the insertion hole is sealed. It becomes possible to suppress liquid from entering the sheath 5 (through the inside of the grommet 5). As described above, according to the present embodiment, it is possible to suppress liquid from entering into the sheath 4 from the end portion 4a of the sheath 4.

Further, by using the grommet 5, it is possible to eliminate the need for a mold or a mold forming machine, which are required to manufacture a resin member using conventional molding. By not using an expensive mold forming machine, there is no need for expensive equipment investment and costs can be reduced. Further, since a place for installing the mold forming machine is not required, space saving in manufacturing can be realized.

There is also a method of sealing off water (preventing liquid from entering the sheath) by molding the end of the sheath, but depending on the type of insulator that makes up the wire, it may dissolve with the molding resin used for the mold. There are some things that don't fit. In this case, water-stopping properties may not be obtained between the electric wire and the molded resin. However, the present invention does not use molded resin and is configured to stop water using a sealing member and a cylindrical member, so it is possible to suppress liquid from entering the sheath regardless of the type of insulator. becomes possible.

(Modified example)
FIG. 9 is a sectional view of a main part of a wire harness 1 according to a modified example of the present invention. As shown in FIG. 9 , the wire harness 1 may further include a bracket 8 that is wound around the outer peripheral surface of the first housing portion 51 of the grommet 5 to hold the grommet 5. The bracket 8 is, for example, a fixture made of a plate-shaped metal such as aluminum. Bracket 8 is an example of a fixing member.

The bracket 8 is configured to integrally include, for example, a tightening portion 81 wound around the outer circumferential surface of the grommet 5 and a fixing portion 82 fixed to an object to be fixed on the vehicle body side. A through hole 820 is formed in the fixing portion 82 and penetrates in the thickness direction. Note that the tightening portion 81 only needs to be wound around at least a portion of the outer peripheral surface of the first accommodating portion 51 .

By providing such a bracket 8, it becomes possible to bring the first inner circumferential surface 51a and the outer circumferential surface 4aa of the one end portion 4a of the sheath 4 into closer contact with each other due to the pressing force of the tightening portion 81, and the first Water sealing between the inner circumferential surface 51a and the outer circumferential surface 4aa of the one end portion 4a of the sheath 4 can be further improved.

Further, a tightening member 9 may be further provided on the outer circumferential surface of the third accommodating portion 53 of the grommet 5. For example, the tightening member 9 has an opening with a notch (not shown) for loosening prevention at one end, and tightens the object by inserting the other end into the opening and pulling the other end. Anything is fine. The tightening member 9 may be made of metal such as SUS, or resin such as polyamide resin.

By providing such a tightening member 9, the water-tightness between the second inner circumferential surface 53a and the outer circumferential surface 61a of the main body portion 61 of the holder 6 can be further improved. In addition, in this embodiment, the grommet 5 and the holder 6 are formed separately, but the grommet 5 and the holder 6 may be formed integrally.

(Summary of embodiments)
Next, technical ideas understood from the embodiments described above will be described using reference numerals and the like in the embodiments. However, each reference numeral in the following description does not limit the constituent elements in the scope of the claims to those specifically shown in the embodiments.

[1] A cable including electric wires (2, 3) and a sheath (4) covering the electric wires (2, 3), and the electric wire (2) exposed from the end (4a) of the sheath (4). , 3), a holding member that holds the sealing member, and a first inner peripheral surface (51a) that contacts the outer peripheral surface (4aa) of the sheath (4). , a cylindrical member made of a cylindrical elastic body having a second inner circumferential surface (53a) in contact with an outer circumferential surface of the holding member, the electric wire extending from the holding member; Wire harness (1).
[2] The seal member has a cylindrical shape through which the electric wires (2, 3) are inserted, and is inserted into the insertion holes (610, 611) formed in the holding member, and the seal member An outer peripheral surface (71a, 72a) that contacts the inner wall (610a, 611a) of the insertion hole (610, 611), and an inner wall (710a) that contacts the outer peripheral surface (21a, 31a) of the inserted electric wire (2, 3). , 720a), the wire harness (1) according to [1] above.
[3] The cylindrical member includes a first accommodating part (51) having the first inner circumferential surface (51a) and accommodating the sheath (4), and the first accommodating part (51). a second accommodating part (52) connected to the second accommodating part (52), and a third accommodating part connected to the second accommodating part (52), having the second inner peripheral surface (53a) and accommodating the holding member. (53) The wire harness (1) according to the above [1] or [2], comprising:
[4] The holding member includes a cylindrical main body (61) and a disc-shaped lid (62) that covers the main body (61), and the main body (61) The part (62) has an engaging protrusion (613) that protrudes outward in the radial direction and fixes the lid (62) to the main body part (62), and the engaging protrusion (613) includes: [3], wherein the length of the main body portion (62) in the axial direction from the bottom surface (61b) is provided at a higher position than the length of the third accommodating portion (53) in the axial direction. Wire harness (1).
[5] Inside the cylindrical member, between the first accommodating part (51) and the second accommodating part (52), a first accommodating part that contacts the end surface (4ab) of the sheath (4) The wire harness (1) according to [3] or [4] above, in which the stepped portion (51b) is formed.
[6] Inside the cylindrical member, between the third accommodating part (53) and the second accommodating part (52), a second accommodating part that contacts the bottom surface (61b) of the holding member is provided. The wire harness (1) according to any one of [3] to [5] above, in which a stepped portion (53b) is formed.
[7] The wire harness (1) according to any one of [3] to [6], wherein the second accommodating portion (52) has an axial length of 1 mm or more and 20 mm or less.
[8] The wire harness (1) according to any one of [3] to [7], wherein the third accommodating portion (53) has a length in the axial direction of 5 mm or more and 30 mm or less.
[9] From [3] above, further comprising a fixing member that is wrapped around the outer circumferential surface of the first accommodating portion (51) to hold the cylindrical member and fix the cylindrical member to a fixing target. The wire harness (1) according to any one of [8].
[10] The wire harness (1) according to any one of [3] to [9], further comprising a tightening member that tightens the outer circumferential surface of the third accommodating portion (53). .

(Additional note)
Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments are essential for solving the problems of the invention.

Moreover, the present invention can be implemented with appropriate modifications within a range that does not depart from the spirit thereof. For example, in the above embodiment, a case has been described in which the wire harness 1 is used in an electric parking brake device or an electric brake device of an automobile, but the use of the wire harness 1 is not limited to this. Furthermore, in the above embodiment, the first core line 2 is used as a power line and the second core line 3 is used as a signal line, but the first core line 2 is used as a signal line. Alternatively, the second core wire 3 may be used as a power supply wire.

1...Wire harness 1A...Intermediate body 2...First core wire 21...First insulated wire 21a...Outer peripheral surface 211...First conductor wire 212...First insulator 3...Second core wire 31...First 2 insulated wire 31a...outer peripheral surface 311...second conductor wire 312...second insulator 4...sheath 4a...one end (one end)
4aa...Outer peripheral surface 4ab...End surface 5...Grommet 51...First accommodating part 51a...First inner circumferential surface 51b...First step part 52...Second accommodating part 521...First cylindrical part 522...Second Cylindrical portion 523...Intermediate portion 53...Third housing portion 53a...Second inner circumferential surface 53b...Second stepped portion 6...Holder 61...Body portion 61a...Outer circumferential surface 61b...Bottom surface 610...First insertion hole 610a...Inner wall 611...Second insertion hole 611a...Inner wall 613...Engaging projection 62...Lid 620...Engaging portion 620a...Engaging hole 621...Engaging piece 7...Wire seal 71...First wire seal 71a... Outer circumferential surface 710...First through hole 710a...Inner wall 72...Second wire seal 72a...Outer circumferential surface 720...Second through hole 720a...Inner wall 8...Bracket 81...Tightening part 82...Fixing part 820...Through hole 9 ...Tightening member

Claims (6)

A cable having an electric wire and a sheath covering the electric wire;
a seal member provided in contact with the outer periphery of the electric wire exposed from the end of the sheath;
a holding member that holds the sealing member;
a cylindrical member made of a cylindrical elastic body having a first inner circumferential surface that contacts the outer circumferential surface of the sheath and a second inner circumferential surface that contacts the outer circumferential surface of the holding member;
The electric wire extends from the holding member,
The cylindrical member includes a first accommodating part having the first inner peripheral surface and accommodating the sheath, a second accommodating part connected to the first accommodating part, and a second accommodating part connected to the first accommodating part. a third accommodating part connected to the third accommodating part, having the second inner peripheral surface and accommodating the holding member;
The holding member includes a cylindrical main body and a disc-shaped lid that covers the main body,
The main body has an engagement protrusion that protrudes outward in a radial direction of the main body and fixes the lid to the main body,
The engagement protrusion is provided at a position where the length in the axial direction from the bottom surface of the main body portion is higher than the length in the axial direction of the third accommodating portion.
wire harness. A first stepped portion that contacts an end surface of the sheath is formed between the first accommodating portion and the second accommodating portion inside the cylindrical member.
The wire harness according to claim 1 . A second stepped portion that contacts the bottom surface of the holding member is formed between the third accommodating portion and the second accommodating portion inside the cylindrical member.
The wire harness according to claim 1 or 2 . The length of the second accommodating portion in the axial direction is 1 mm or more and 20 mm or less,
The wire harness according to any one of claims 1 to 3 . The length of the third housing part in the axial direction is 5 mm or more and 30 mm or less,
The wire harness according to any one of claims 1 to 4 . A cable having an electric wire and a sheath covering the electric wire;
a seal member provided in contact with the outer periphery of the electric wire exposed from the end of the sheath;
a holding member that holds the sealing member;
a cylindrical member made of a cylindrical elastic body having a first inner circumferential surface that contacts the outer circumferential surface of the sheath and a second inner circumferential surface that contacts the outer circumferential surface of the holding member;
The electric wire extends from the holding member,
The cylindrical member includes a first accommodating part having the first inner peripheral surface and accommodating the sheath, a second accommodating part connected to the first accommodating part, and a second accommodating part connected to the first accommodating part. a third accommodating part connected to the third accommodating part, having the second inner peripheral surface and accommodating the holding member;
further comprising a fixing member that is wound around the outer circumferential surface of the first accommodating portion to hold the cylindrical member and fix the cylindrical member to a fixing target;
wire harness.

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