JP2016167910A - Wiring installation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for suppressing increase in the capacity of a protector while suppressing the reaction force applied from the protector to a wire, when providing an extra length absorption part in the protector.SOLUTION: A first wire 14 and a second wire for connection with an electronic apparatus include a first protector 18 into which the first wire 14 is inserted, and a second protector 20 into which the second wire is inserted. The first protector 18 has an extra length absorption part 32 for housing the extra length of the first wire 14. A part of the second protector 20 is disposed at a position facing an opening 42 formed in the extra length absorption part 32 while being separated by an extra length absorption space 44. The first wire 14 can squeeze out from the opening 42, in the extra length absorption space 44.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a wire routing structure for routing a wire such as a wire harness to a vehicle body.

  An electric wire such as a wire harness is routed in an automobile vehicle in order to electrically connect various electronic devices such as a battery. One end of the electric wire is connected to a device terminal of the electronic device via an electrical connection box or the like. Further, the intermediate portion of the electric wire is inserted into a protector fixed to the vehicle body in order to define a routing route in the vehicle and protect it from the external environment.

  Since one end of this type of electric wire is attached to and detached from the electronic device during assembly or maintenance, it may be required to be displaced relative to the electronic device. In this case, the length dimension of the electric wire must include a dimension for allowing relative displacement with respect to the electronic equipment as a surplus length in addition to the dimension necessary for routing along the predetermined routing path. is there.

  When such an extra length is included in the length of the electric wire, after attaching the device side end to the electronic device, the electric wire has an extra length and a part of the flexure will be formed, May cause interference with parts. As a countermeasure, Patent Document 1 discloses a protector provided with a surplus length absorbing portion for accommodating the surplus length of an electric wire. A wire harness routed between the body of the vehicle and the door is inserted into the protector, and the extra length of the wire harness is absorbed in the bulge portion provided in the protector.

JP 2014-93508 A

  By the way, in a conductive path through which a large current flows, such as a conductive path provided between a battery and another electronic device, a thick electric wire having a small electric resistance is usually used for the purpose of suppressing heat generation resistance or the like. Since this thick wire is more rigid than the thin wire, a reaction force is easily applied by contact with other members.

  In the structure of Patent Literature 1, when the extra length of the thick wire hits the inner wall surface of the extra length absorbing portion of the protector, a large reaction force is easily applied from the protector to the thick wire. Due to this reaction force, a large load is easily applied to the terminal connection portion of the electrical connection box connected to the device terminal such as a battery post.

  In order to improve this, the volume of the extra length absorption part of the protector is increased for the purpose of increasing the amount of absorption for the extra length in the extra length absorption part of the protector and suppressing the reaction force from the protector to the thick wire. Means are also conceivable. However, if the volume of the protector is increased, the cost of parts is increased.

  The present invention has been made in view of such a situation, and its purpose is to provide a technology capable of suppressing the increase in the volume of the protector while suppressing the reaction force applied to the electric wire from the protector when the extra length absorbing portion is provided in the protector. It is to provide.

  In order to solve the above-described problem, an electric wire routing structure according to an aspect of the present invention includes a first electric wire connected to an electronic device, a second electric wire connected to the electronic device, and a first electric wire inserted through the first electric wire. 1 protector and a second protector through which the second electric wire is inserted, the first protector has a surplus length absorbing portion for accommodating the surplus length of the first electric wire, and a part of the second protector is A surplus length absorption space is disposed at a position facing the opening formed in the surplus length absorption portion, and a part of the first electric wire can protrude from the opening in the surplus length absorption space.

  According to this aspect, when the end of the first electric wire is displaced in a predetermined displacement direction in order to attach the end of the first electric wire to the electronic device, a part of the first electric wire is moved from the opening to the extra length absorption space. Can protrude. Therefore, compared with the case where there is no opening part, the reaction force given to a 1st electric wire by contact with a 1st protector is suppressed. Moreover, since the surplus length absorption space can be used for absorbing the surplus length of the first electric wire, the surplus length absorption area for absorbing the surplus length of the first electric wire without increasing the volume of the first protector. Can be expanded.

  ADVANTAGE OF THE INVENTION According to this invention, when providing a surplus length absorption part in a protector, the technique which can suppress the increase in the volume of a protector can be provided, suppressing the reaction force added to an electric wire from a protector.

It is a perspective view which shows an electric wire wiring structure. It is the side view which looked at the electric wire wiring structure from direction Vd1 of FIG. It is a side view which shows the state which removed the 1st electric wire from the battery post. It is the perspective view which looked at the 1st protector of Drawing 1 from the lower side. It is a bottom view of a 1st protector. It is the perspective view which looked at the 2nd protector of Drawing 1 from the upper part. It is a top view of a 2nd protector. It is an expanded sectional view which expands and shows the surplus length absorption part of FIG. It is an expanded sectional view which shows roughly the inside of the surplus length absorption part when it exists in the state which removed the apparatus side edge part of the 1st electric wire from the battery post.

  FIG. 1 is a perspective view showing an electric wire routing structure 10 according to the present embodiment. The electric wire routing structure 10 has a battery 12 as a first electronic device, four first electric wires 14 connected to the battery 12, a second electric wire 16 connected to the battery 12, and the first electric wire 14 inserted therethrough. The 1st protector 18 and the 2nd protector 20 in which the 2nd electric wire 16 is penetrated are provided.

  FIG. 2 is a side view schematically showing the wire routing structure 10 from the arrow Vd1 in FIG. Although not shown, the battery 12 is fixed to the vehicle body using a battery bracket or the like in the engine room of the vehicle body. The battery 12 includes a device case 22 serving as an outer shell and a columnar battery post 24 protruding from the upper surface of the device case 22. The battery post 24 is a device terminal protruding from the outer surface of the device case 22.

  The four first electric wires 14 and the second electric wires 16 are mechanically and electrically connected to the battery post 24 via an electric connection box 26 such as a fusible link unit. The electrical connection box 26 has a terminal connection portion 28 that is mechanically connected to the battery post 24. The terminal connection portion 28 has a terminal insertion hole 30 in which the battery post 24 is disposed inside. The terminal connection portion 28 can be reduced in diameter so as to sandwich the battery post 24 and can be held in a reduced diameter state. The terminal connection portion 28 is fixed to the battery post 24 by placing the battery post 24 in the terminal insertion hole 30 and holding the battery post 24 in a sandwiched state.

  FIG. 3 is a side view showing a state where the first electric wire 14 is detached from the battery post 24. When the electric junction box 26 is attached to the battery post 24, the electric junction box 26 is moved toward one side P1 in the axial direction of the battery post 24 (lower side in this figure) so that the battery post 24 is inserted into the terminal insertion hole 30. .

  Returning to FIG. 2, when the electrical connection box 26 is removed from the battery post 24, the battery post 24 is pulled out from the terminal insertion hole 30 to the other side P <b> 2 in the axial direction of the battery post 24 (upper side in this figure). It is moved towards. At these times, the device-side end portion 14a of the first electric wire 14 that is the end portion on the battery 12 side also moves in the same manner. That is, the device-side end portion 14a of the first electric wire 14 can be displaced along the axial direction of the battery post 24, in other words, in a predetermined direction when being attached to or detached from the battery post 24. In the following description, the direction in which the device-side end portion 14a of the first electric wire 14 is displaced when attached to the battery post 24 will be described as the lower displacement direction P1 (see FIG. 3).

  The first electric wire 14 constitutes an engine room harness that electrically connects the battery 12 and a second electric device (not shown) such as a relay box or junction block in the engine room. The 1st electric wire 14 is arrange | positioned in the state in which the apparatus side edge part 14a faces upwards. As shown in FIG. 1, the four first electric wires 14 are arranged such that the respective device-side end portions 14 a are arranged in one direction X, and the respective intermediate portions are inserted into the first protector 18. Hereinafter, the direction in which the four first electric wires 14 are arranged is referred to as the left-right direction X, and the horizontal direction orthogonal to the left-right direction X is referred to as the front-rear direction Y.

  Returning to FIG. 2, the second electric wire 16 constitutes an engine harness that electrically connects the battery 12 and a third electric device (not shown) such as an alternator, a starter, and a DC-DC converter in the engine room. The 2nd electric wire 16 is arrange | positioned in the state in which the apparatus side edge part 16a which is an edge part by the side of the battery 12 faces upwards. As for the 2nd electric wire 16, the apparatus side edge part 16a is arrange | positioned with respect to the four 1st electric wires 14 in the front-back direction Y, and the intermediate part is penetrated in the 2nd protector 20. FIG.

  4 is a perspective view of the first protector 18 as viewed from below, and FIG. 5 is a bottom view of the first protector 18. In FIG. 4, only the first electric wire 14 outside the first protector 18 is indicated by a two-dot chain line. The 1st protector 18 is for protecting the several 1st electric wire 14 from an external environment while prescribing | regulating the routing path | route of the some 1st electric wire 14. FIG. As shown in FIGS. 2 and 4, the first protector 18 includes a first insertion port 18 a through which one end of the first electric wire 14 is inserted, and a first passage portion 18 b in which the first insertion port 18 a is provided at the tip. Have The first passage portion 18b is formed in a horizontally long cylindrical shape in the left-right direction X. The 1st channel | path part 18b is arrange | positioned in the state made upward. As shown in FIG. 4, the first protector 18 includes a second passage 18c through which the other end of the first electric wire 14 is inserted, and a second passage in which the second insertion port 18c is formed at the tip. 18d. The plurality of first electric wires 14 are pulled out from the second insertion port 18 c after being bundled together at a midway position of the first protector 18.

  The 1st protector 18 is connected to the base end part of the 1st channel | path part 18b, and has the surplus length absorption part 32 arrange | positioned in the state which each of the four 1st electric wires 14 bent. Details of the surplus length absorber 32 will be described later.

  FIG. 6 is a perspective view of the second protector 20 of FIG. 1 as viewed from above, and FIG. 7 is a top view of the second protector 20. In FIG. 6, only the second electric wire 16 outside the second protector 20 is indicated by a two-dot chain line. The 2nd protector 20 protects the 2nd electric wire 16 and the 3rd electric wire from the outside environment while prescribing the routing route of the 2nd electric wire 16 and the 3rd electric wire (after-mentioned). The 2nd protector 20 is arrange | positioned with respect to the 1st protector 18 in the downward displacement direction P1 (lower side) of the above-mentioned 1st electric wire 14 (refer FIG. 3). The second protector 20 has a first conduction port 20a through which one end side of the second electric wire 16 is inserted, a first conducting path portion 20b in which the first conduction port 20a is provided at the tip, and the other end side of the second electric wire 16 at the other end side. It has the 2nd conduction | electrical_connection opening 20c penetrated, and the 2nd conduction | electrical_connection part 20d by which the 2nd conduction | electrical_connection opening 20c is provided in a front-end | tip part. The first conduit portion 20b and the second conduit portion 20d are connected via a conduit junction portion 20e. One end portion of a third conduit portion 20f branched from the conduit junction portion 20e is connected to the conduit junction portion 20e, and a third conduction port 20g is formed at the other end portion of the third conduit portion 20f. The The third conduction port 20g is for inserting one end side of a third electric wire (not shown). The third electric wire is drawn out from the second conduction port 20c via the third conductor portion 20f and the second conductor portion 20d.

  As shown in FIGS. 4 and 5, the first protector 18 is provided with two first protector fixing portions 34 for fixing to the second protector 20. One first protector fixing portion 34 is provided below the surplus length absorbing portion 32 of the first protector 18, and the other first protector fixing portion 34 is provided on the side portion of the second passage portion 18d. The 1st protector fixing | fixed part 34 protrudes toward the lower side where the 2nd protector 20 exists. The first protector fixing portion 34 is provided with a pair of elastic claws 34a that can be elastically deformed.

  As shown in FIGS. 6 and 7, the second protector 20 is formed with first fixing holes 36 at positions corresponding to the two first protector fixing portions 34. One first fixing hole 36 is formed in a plate-like erection part 38 that spans between the first and second guide path parts 20b and 20d. The other first fixing hole 36 is formed on the side of the second conduit portion 20d. The elastic claw 34 a of the first protector fixing portion 34 is detachably engaged with the peripheral portion of the first fixing hole 36 by a snap fit method by being inserted into the first fixing hole 36. The first protector 18 is detachably fixed to the second protector 20 by the engagement of the elastic claws 34a of the first protector fixing portions 34.

  As shown in FIG. 7, the second protector 20 is provided with a second protector fixing portion 40 for fixing to the vehicle body. The 2nd protector fixing | fixed part 40 protrudes toward the lower side with a vehicle body. Similarly to the first protector fixing part 34, the second protector fixing part 40 is also provided with an elastic claw (not shown). The 2nd protector fixing | fixed part 40 is detachably engaged with the peripheral part of a fixing hole by a snap fit system by insertion in the fixing hole (not shown) formed in a vehicle body. The second protector 20 is detachably fixed to the vehicle body together with the first protector 18 by the engagement of the elastic claws 34 a of the second protector fixing portion 40.

  For the length dimension of the first electric wire 14 described above, a routing path assumed in advance in the range from the tip position of the device-side end portion 14a of the first electric wire 14 to the second insertion port 18c of the first protector 18 is used. In addition to the dimensions necessary for routing along, predetermined dimensions are included as extra lengths. When the first electric wire 14 is attached to or detached from the battery post 24, the battery 12 and the first protector are included in a predetermined dimension corresponding to the extra length for a part including the device-side end portion 14 a of the first electric wire 14. 18 to allow relative displacement with respect to 18.

  FIG. 8 is an enlarged sectional view schematically showing the inside of the surplus length absorbing portion 32 of FIG. In this figure, the AA line cross section of FIG. The outline of the range B in FIG. 7 with respect to the second protector 20 is schematically shown. The surplus length absorbing portion 32 is seen from the inner corner side wall surface 32a facing the inner corner portion 14b of the bent portion of the first electric wire 14 inserted inside thereof, and its inner space is set in the lower displacement direction P1 of the first electric wire 14. Formed to spread. In the surplus length absorbing portion 32, a part of the opening 42 is formed at a position away from the inner side wall surface 32a in the lower displacement direction P1. As shown in FIGS. 4 and 5, the opening 42 is formed in a range C from the surplus length absorbing portion 32 to the midway position of the second passage portion 18 d.

  Returning to FIG. 8, a part of the second protector 20 is disposed at a position facing the opening 42 of the first protector 18 and the aforementioned lower displacement direction P <b> 1 with a surplus length absorption space 44 therebetween. Here, “a part of the second protector 20” includes a range D of a part of the first guide path part 20b and the installation part 38 of the second protector 20, as shown in FIG. As shown in FIG. 8, the first electric wire 14 can protrude from the opening 42 of the first protector 18 into the extra length absorption space 44. Specifically, a part of the middle portion of the first electric wire 14 that is inserted from the first insertion port 18a to the second insertion port 18c (see FIG. 4) is an extra length absorption space from the opening 42 of the first protector 18. 44 can be projected. When the plurality of first electric wires 14 are connected to the battery post 24 via the electric junction box 26 in the extra length absorbing portion 32 and the extra length absorbing space 44, the extra length is generated due to the extra length of the first electric wires 14. A flexible portion 46 is disposed. That is, the bent portion 46 generated by the extra length is absorbed in the extra length absorbing portion 32 and the extra length absorbing space 44. The flexible portion 46 is formed to be convex in the lower displacement direction P1 of the first electric wire 14 described above.

  When the amount of protrusion of the first electric wire 14 from the opening 42 of the first protector 18 to the surplus length absorption space 44 exceeds a predetermined amount of protrusion, the second protector 20 has a protruding portion 46 of the first electric wire 14. It arrange | positions in the position which contact | abuts. Thereby, even when the protrusion amount of the 1st electric wire 14 is large, it can prevent interference with a peripheral component by contact with the protrusion part 46 of the 1st electric wire 14, and the 2nd protector 20, and also the protrusion part of the 1st electric wire 14 46 can be protected from external stress.

The effect of the above electric wire wiring structure 10 is demonstrated.
FIG. 9 is an enlarged cross-sectional view schematically showing the inside of the surplus length absorbing portion 32 when the device side end portion 14a of the first electric wire 14 is removed from the battery post 24 as shown in FIG. . In this figure, the cross section of the same position as FIG. 8 is shown.

  When the device-side end 14a of the first electric wire 14 in this state is attached to the battery post 24, the device-side end 14a of the first electric wire 14 is connected to one of the battery posts 24 in the axial direction (see FIG. 3). It is moved together with the electric junction box 26 in the downward displacement direction P1 toward the lower side in this figure. Thereby, as shown in FIG. 8, a deflection portion 46 is formed in a part of the first electric wire 14 so as to protrude in the lower displacement direction P <b> 1 in the surplus length absorbing portion 32 of the first protector 18. The As the displacement amount of the device-side end portion 14a of the first electric wire 14 increases, the deflection portion 46 increases in the deflection amount in the lower displacement direction P1. It protrudes from the opening 42 to the surplus length absorption space 44.

  As described above, when the device-side end portion 14 a of the first electric wire 14 is displaced in the above-described lower displacement direction P <b> 1, a part of the first electric wire 14 can protrude from the opening 42 into the extra length absorption space 44. . Therefore, the reaction force applied to the first electric wire 14 due to the contact with the first protector 18 is suppressed as compared with the case where there is no opening 42. Therefore, an increase in the load applied to the terminal connection portion 28 of the electrical connection box 26 is suppressed by this reaction force, and the connection state at the terminal connection portion 28 can be easily maintained favorably.

  Moreover, when providing the surplus length absorption part 32 in the 1st protector 18, not only the internal space but also the surplus length absorption space 44 between the 1st protector 18 and the 2nd protector 20 is used, and the 1st electric wire 14 is used. The excess length can be absorbed. Therefore, the extra length absorption area for absorbing the extra length of the first electric wire 14 can be expanded without increasing the volume of the first protector 18, and the increase in parts cost and interference with peripheral parts can be suppressed accordingly.

  Moreover, since the opening part 42 is provided in the 1st protector 18 in order to expand a surplus length absorption area, the cost reduction by the weight reduction of the 1st protector 18 and the reduction of the amount of raw materials to be used can be aimed at.

  In addition, the applicant of the present application fixes the device-side end of the first electric wire in order to suppress deformation of the device-side end 14a due to the reaction force applied to the device-side end 14a of the first electric wire 14. An application has been filed for an invention in which a part is provided in a protector (Japanese Patent Application No. 2014-032169). In this application, the housing part for housing the electric wire and the fixing part for fixing the electric wire are provided in the protector as separate bodies, and the number of parts increases. In this respect, according to the present embodiment, such a separate fixing portion is not necessary, and thus the cost can be reduced by reducing the number of parts. In addition, since it is not necessary to attach such a separate fixed portion to the housing portion, there is an advantage that an increase in work man-hours during assembly and maintenance can be suppressed, and workability during these operations is improved.

  In addition, as shown in FIG. 8, a part of 1st electric wire 14 is pulled out outside the 1st insertion port 18a of the 1st protector 18. As shown in FIG. A portion including the lead-out portion 14 c of the first electric wire 14 is inserted through the cylindrical exterior member 48. The material of the exterior member 48 is selected so that the bending rigidity is larger than that of the first electric wire 14, and the bending deformation of the drawn portion 14 c of the first electric wire 14 can be restricted. Thereby, when the apparatus side end part 14a of the 1st electric wire 14 displaces to the above-mentioned lower side displacement direction P1, the bending of the drawer | drawing-out part 14c of the 1st electric wire 14 is suppressed, and it can prevent the interference to peripheral components by a bending. Moreover, it becomes easy to guide the lead-out portion 14c of the first electric wire 14 into the first insertion port 18a.

  In the above, this invention was demonstrated based on the Example. The embodiments are merely examples, and it will be understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Electric wire wiring structure, 12 ... Battery (electronic device), 14 ... 1st electric wire, 16 ... 2nd electric wire, 18 ... 1st protector, 20 ... 2nd protector, 32 ... Extra length absorption part, 42 ... Opening part , 44 ... extra length absorption space.

Claims (1)

A first electric wire connected to the electronic device;
A second electric wire connected to the electronic device;
A first protector through which the first electric wire is inserted;
A second protector through which the second electric wire is inserted,
The first protector has a surplus length absorbing portion that accommodates the surplus length of the first electric wire,
A part of the second protector is disposed at a position facing the opening formed in the surplus length absorption portion with a surplus length absorption space therebetween,
A part of the first electric wire can protrude from the opening in the extra length absorption space.

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