JP4914746B2 - Electrical junction box with harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely assemble a wiring harness to a bracket structural body installed at an electric connection box with high workability. <P>SOLUTION: In a structure in which the bracket structural body 2 is fixed to the electric connection box 1, and the bracket structural body is fixed to an installation side, the wiring harness 31 is made to penetrate a harness protector 3 having an oblong opening 28 formed along the longitudinal direction, an engagement part 29 of the harness protector is engaged with a locking part 24 of the bracket structural body, and the oblong opening is blocked by the wall face 15a of the bracket structural body. A protruding wall 21 for positioning and guiding the harness protector 3 is formed at the bracket structural body 2. The harness protector 3 is arranged to be flush with the protruding wall 21 in a state that the engagement part 29 is engaged with the locking part 24. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a harness-attached structure for an electrical junction box in which an external wire harness is assembled to the electrical junction box via a bracket structure.

  FIG. 5 shows one form of a conventional electrical junction box (see Patent Document 1).

  This electrical connection box (junction box or junction block) 41 is erected from a circuit board on a synthetic resin case 42, a circuit board (not shown) mounted in the case 42, and the opening 43 side of the case 42. The component connection parts 44 and 45 which accommodate the terminal (not shown) and the connector 46, and a pair of brackets 47 provided integrally on the outside of the case 42 are provided.

  The component connecting portion is a relay connecting portion 44 or a fuse connecting portion 45, and is constituted by a connecting portion main body (represented by reference numerals 44 and 45) integrated with the case 42 and a terminal (not shown) on the circuit board side. The circuit board is appropriately provided with a circuit such as a printed circuit and a bus bar circuit such as an electric wire.

  There are two connectors 46, one for input and one for output. The connector of the wire harness (not shown) on the power supply side is connected to the connector 46 for input, and is relayed from the circuit board through relays and fuses of the component connecting portions 44 and 45. The output connector 46 is connected to a load-side wire harness (not shown). That is, the power source current is distributed to the load side through components such as a relay and a fuse of the electrical connection box 41.

  The opening 43 of the case 42 is closed by a cover (not shown), and an input wire harness (not shown) is inserted through the hole of the cover. The case 42 may be referred to as a lower cover. The position of the input / output connector 46 is not limited to the opening 43 side of the case 42 but may be arranged on the back side or back side of the case 42. Also, an electronic control unit (not shown) may be attached to the back surface of the case 42 and connected to the circuit board in the case 42.

  Each bracket 47 has a hole 47a for inserting a bolt, and is fastened and fixed to a vehicle body, a panel or the like with a bolt (not shown). The attachment direction of the electrical junction box 41 to the vehicle body or the like is not limited to the horizontal orientation, and may be attached vertically or obliquely.

  For example, in the electrical connection box 41, when an external wire harness (a plurality of electric wires) not related to the electrical connection box 41 is attached (routed and fixed) along the outer surface of the case 42, the harness is fixed to the case 42. The hook portion or the like may be provided integrally.

  FIG. 6 shows one form of a conventional harness-attached structure of an electrical junction box.

  In this structure, a separate large bracket structure 48 is attached to the case 4 of the electrical junction box 1, and an external wire harness 31 that is not related to the electrical junction box 1 is placed along the bracket structure 48 along the synthetic resin. It is fixed with a band 49 made of metal.

  After the bracket structure 48 is assembled to the electrical connection box 1, the wire harness 31 is assembled to the bracket structure 48, or the wire harness 31 is fixed to the bracket structure 48 with a band 49, and then the bracket structure is assembled to the electrical connection box 1. Whether the body 48 is assembled can be selectively implemented as appropriate.

  The bracket structure 48 is obtained by extending the bracket 17 to the rear side of the vehicle body or the like that cannot be reached by the bracket 6 of the electrical junction box 1, and the bracket 5 of the electrical junction box 1 is connected to the sub brackets 9 and 10 of the bracket structure 48. 6 is tightened and fixed with bolts and nuts, and the extended main bracket 17 of the bracket structure 48 and the hole 23 of the board portion 15 are fixed to the vehicle body and the panel with bolts.

A band 49 for fixing the wire harness 31 to the bracket structure 48 includes a band-shaped band main body having a sawtooth projection (not shown) on the surface, and an insertion locking portion (not shown) provided at the end of the band main body. The band main body is inserted into the insertion locking portion, the wire harness 31 is tightened, and the sawtooth projections are locked. The bracket structure 48 is provided with a hole 50 through which the band 49 is inserted.
Japanese Patent Laid-Open No. 11-266515 (FIG. 1)

  However, in the electrical junction box attached structure shown in FIG. 6, the electrical junction box 1 may not require the bracket structure 48 depending on the mounting position on the vehicle. 48, and particularly the attachment of the wire harness 31 to the bracket structure 48 is often performed in a warehouse or the like away from the production line, and the attachment work of the wire harness 31 to the bracket structure 48 is easily performed. Therefore, a wire harness mounting structure that is simpler and better in workability than the fixing of the wire harness 31 by the band 49 has been desired.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a harness-attached structure for an electrical connection box that can easily and reliably assemble a wire harness to a bracket structure to be mounted on the electrical connection box. .

To achieve the above object, a harness attached structure of an electrical connection box according to claim 1 of the present invention, in the structure fixing the electrical connection box on the bracket structure to secure the bracket structure to the mounting side, the bracket A structure has a bracket for fixing the electrical junction box to one wall surface side of the substrate portion, and a locking portion for fixing a harness protector having a substantially concave cross section to the other wall surface side of the substrate portion. The harness protector includes a long opening extending in the longitudinal direction for inserting the wire harness, and both side walls having engaging portions with respect to the locking portion , and the harness protector enters the harness protector from the opening. in a state where the wire harness is inserted, the engaging portion is engaged with the engagement portion, the distal end surface of the both side walls in contact with the other wall surface of the base plate portion, said openings in said other wall surface and wherein the busy Garrel

  With the above configuration, the wire harness is inserted into or fixed through the harness protector, and the harness protector is locked to the bracket structure by the locking means (the locking portion and the engaging portion). The bracket structure is preferably assembled and fixed to the electrical junction box in advance. At the same time that the harness protector is locked to the bracket structure, the opening of the harness protector is blocked by the bracket structure, and the wire harness (a plurality of electric wires) in the harness protector is prevented from jumping out. The lead-out direction of the wire harness is defined by the harness protector.

The harness-attached structure of the electrical junction box according to claim 2 is the harness-attached structure of the electrical junction box according to claim 1, wherein the bracket structure positions one side wall of the harness protector on the other wall surface side. A protruding wall having one side surface for guiding is provided .

  With the above configuration, the harness protector is smoothly locked by the locking means (the locking portion and the engaging portion) while being positioned along the protruding wall of the bracket structure.

The harness attachment structure of the electrical junction box according to claim 3 is the harness attachment structure of the electrical junction box according to claim 2, wherein the engagement portion is engaged with the locking portion, and the side wall of the harness protector is engaged. The wall portion on the front side that intersects with the projection wall is located in the same plane as the wall surface on the front side of the protruding wall.

  With the above-described configuration, the operator can visually confirm the amount of protrusion of the harness protector from the protruding wall by finger or visual observation, whereby imperfect engagement (engagement) between the engagement portion and the engagement portion is detected. If the locking is incomplete, the harness protector is pressed against the bracket structure to ensure the locking.

  According to the first aspect of the present invention, since the opening of the harness protector is closed by the bracket structure and the cover part of the harness protector is not required, the labor and parts cost for assembling the cover part are reduced, and the efficiency is reduced. In addition, the wire harness can be assembled to the bracket structure while reducing the weight at low cost and space. Further, since the harness protector can be easily and reliably fixed to the bracket structure by the locking means, the assembly workability (efficiency) and the reliability of the harness fixing are improved. In addition, since the wire harness is safely protected in the protector without interference with the outside, the reliability of the power supply (power supply) of the wire harness is improved, and the electrical junction box assembly (electricity) to the vehicle or the like (attachment side) is improved. The wire harness is prevented from being caught when the junction box, bracket structure and wire harness are assembled, and the assembly of the electrical junction box assembly to the mounting side is improved (this effect is achieved by the harness protector). It is also promoted by eliminating the unevenness of the bulge on the outside).

  According to invention of Claim 2, a harness protector can be easily and reliably assembled | attached to a bracket structure along a protruding wall, and the attachment workability | operativity of a wire harness improves.

  According to the third aspect of the present invention, imperfect locking of the harness protector to the bracket structure can be easily found by hand feeling or visual observation, and the reliability of fixing the wire harness is increased.

  1 to 4 show an embodiment of a structure with a harness for an electrical junction box according to the present invention.

  As shown in FIG. 1, the harness-attached structure of the electrical junction box includes an electrical junction box 1, a synthetic resin bracket structure 2 assembled to the electrical junction box 1, and a synthetic resin abbreviation assembled to the bracket structure 2. A saddle-shaped harness protector 3 is provided.

  As shown in FIG. 2, the electrical connection box 1 includes a rectangular block-shaped synthetic resin case (connection box body) 4, a pair of brackets 5, 6 integrally provided on the diagonal of the case 4, and the case 4. Input / output connectors 7 provided on the side surfaces, a circuit board (not shown) disposed in the case 4, and electrical components such as relays and fuses (not shown) connected to the circuit board Is provided.

  The electrical parts are sealed with a cover 8, and the cover 8 is locked to the case 4 by locking means 13 (FIG. 1). The cover 8 may be viewed as a part of the case 4. The case 4 includes a front-side vertical and wide wall surface 14 that is in close contact with the bracket structure 2, a horizontal upper wall surface 18 that projects the upper bracket 5, and a lower horizontal surface that projects the lower bracket 6. Wall surface 19 and vertical side wall surface 20 on which connector 7 is arranged.

  Each connector 7 has a plurality of pin-shaped male terminals (not shown) in a connector fitting chamber (represented by reference numeral 7), and by rotating a lever (not shown), It is preferable that fitting and disengagement with a connector (not shown) is performed smoothly and reliably.

  The electrical junction box 1 of this example is arranged vertically (vertically) inside (back) the instrument panel of the automobile, and is fixed to the instrument panel (attachment side) with the bracket structure 2 (FIG. 1). The upper and lower brackets 5 and 6 of the electrical junction box 1 are fastened and fixed to the upper and lower sub brackets 9 and 10 of the bracket structure 2 by bolts 11 and nuts 12 (FIG. 3). The nut 12 is fixed to the bracket structure 2 in advance.

  As shown in FIGS. 3 (a) and 3 (b) ((a) is a front view and (b) is a back view), the bracket structure 2 includes a flat and wide vertical substrate portion 15 and one end (lower end) of the substrate portion 15. ) Side, and a horizontal extension 16 projecting from one side end (front end) of the substrate portion 15 in the width direction of the substrate portion and projecting from the wall surface (surface) 15a of the substrate portion 15 in a plate-like direction in a stepped manner. A main bracket 17 on the front end (front end) side of the portion 16, a vertical projecting wall (guide wall) 21 that bulges to the surface side at the center in the width direction of the substrate portion 15 and intersects the center of the extension portion 16; The sub brackets 9 and 10 projecting diagonally on the upper front end side and the lower rear end side of 15 are formed by integral resin molding.

  The main bracket 17 and the sub brackets 9 and 10 each have a hole and nuts 12 and 22 communicating with the hole. An oval hole 23 is provided on the upper rear end side of the substrate portion 15 and near the rear end of the extension portion 16. The protruding wall 21 has both long vertical side surfaces 21a and a short upper end surface 21b. The protruding height of the protruding wall 21 in the board portion plate thickness direction is set substantially equal to the height H (FIG. 1) of the harness protector 3 in the same direction.

  The bracket structure 2 is fastened and fixed to the panel (not shown) of the vehicle body with bolts (not shown) by the main bracket 17 and the holes 23. A plurality of reinforcing ribs (not shown) are provided so as to intersect each other on the back surface of the substrate portion 15 and the inside of the extension portion 16. In addition, in this embodiment, the directionality of up and down, front and rear, right and left is for convenience of explanation, and does not necessarily coincide with the mounting direction of the electrical junction box 1.

A plurality of locking claws (locking portions) 24 for locking the harness protector 3 project from the surface of the substrate portion 15 at important points. The locking claw 24 includes a support column 24a that protrudes from the surface of the substrate unit 15, and a claw component 24b that protrudes outward (outward from the harness protector 3) from the tip of the support column 24a. Locking claws 24 (24 _{1 to} 24 ₃ ) positioned with respect to the bent outer surface of the harness protector 3 are arranged near the rear end, upper rear end, and upper front end of the board portion 15, The locking claws 24 (24 _{4 to} 24 ₅ ) positioned with respect to the side surface are disposed in the vicinity of the protruding wall 21 and on the front end side of the substrate portion 15.

  As shown in FIGS. 4 (a) and 4 (b) ((a) is a front view and (b) is a back view), the harness protector 3 includes a wide wall 25 on the front (front) side and narrow walls on both sides. A long opening through which the wire harness (a plurality of insulated coated electric wires) 31 is inserted on the back surface side. 28, and is bent in a substantially L shape substantially at a right angle in the middle in the longitudinal direction.

  The front wall portion 25 is formed to be substantially flat, and an engagement frame piece (engagement portion) that engages with each of the locking claws 24 of the bracket structure 2 at the outer surface side of the wall portions 26 and 27 on both sides. ) 29. The engagement frame piece 29 is composed of a pair of opposing support pieces 29a protruding from the outer surfaces of the wall portions 26, 27 on both sides, and a connection piece 29b connecting the pair of support pieces 29a. A rectangular hole 29c surrounded by 29b and the outer surfaces of the walls 26 and 27 is provided on the inner side.

  When the respective locking claws 24 of the bracket structure 2 are inserted into the respective hole portions 29c, for example, the locking claws 24 are bent inward while being in sliding contact with the inner surface of the connecting piece 29b and smoothly inserted into the hole portions 29c. When the claw portion 24b of the locking claw 24 passes through the connecting piece 29b, it is elastically restored and firmly engaged with the connecting piece. It is also possible to allow the claw portion 24b to enter while bending the thin connecting piece 29b outward.

  The locking means composed of the locking claw 24 and the engagement frame piece 29 is an existing one. As the locking means, for example, the locking claw 24 is provided in the harness protector 3, and the bracket structure 2 is provided with an engagement hole (see FIG. (Not shown) can be provided (however, the engagement hole is provided at a position where it does not interfere with the electrical connection box 1 on the back surface side).

  A narrow harness fixing wall 30 projects in the longitudinal direction of the protector from the opening 28a on one end (upper end) side of the harness protector 3, and the opening 28b on the other end (lower end) side of the harness protector 3 has an electrical connection box 1 side. A harness guide wall 32 that is bent at approximately 90 ° is projected. The harness guide wall 32 preferably functions also as a harness fixing wall for fastening the wire harness 31 with a band.

  The wire harness 31 is fixed to the harness fixing wall 30 at least on the upper end side by tape winding or band fastening. The wire harness 31 is accommodated (inserted) in the harness protector 3 in a state where a plurality of electric wires 31a are separated or bundled by tape winding (partial winding, rough winding, or entire winding). A wire harness 31 is bent and routed in the direction of the electrical junction box 1 along the harness guide wall 32 on the lower end side of the harness protector 3.

  The harness protector 3 is fixed to the wire harness 31 by tape winding or the like in advance on the production line. An operator assembles the harness protector 3 fixed to the wire harness 31 to the bracket structure 2 in another process such as a warehouse. This assembly operation is a simple operation in which the engagement frame pieces 29 of the harness protector 3 are engaged with the engagement claws 24 of the bracket structure 2 with one touch. The bracket structure 2 is fixed to the electrical junction box 1 by bolting in advance (after fixing the wire harness 31 to the bracket structure 2 with the harness protector 3, the electrical junction box 1 can be assembled but is troublesome. is there).

  In the state where the wire harness 31 is inserted into the harness protector 3 as shown in FIG. 4B, the harness protector 3 is assembled (attached) to the bracket structure 2 as shown in FIG. The shape-shaped opening 28 (FIG. 3) is blocked by the surface 15a of the substrate portion 15 of the bracket structure 2, and the escape of the wire harness 31 from the harness protector 3 is prevented.

  In a state where the locking claw 24 is engaged with the engagement frame piece 29, the end surfaces 26a, 27a of the wall portions 26, 27 on both sides of the harness protector 3 are in close contact with the wall surface 15a of the bracket structure 2 without rattling. An opening 28 a on the upper end side of the harness protector 3 is located at the front end of the bracket structure 2, and an opening 28 b on the lower end side of the harness protector 3 is located at the lower end of the bracket structure 2.

  Thus, the bracket structure 2 plays the role of a cover that closes the opening 28 of the harness protector 3, thereby reducing the number of covers (parts) necessary for the conventional harness protector, reducing the cost of the harness protector 3, and the cover. The effort (man-hours) required for assembly can be reduced.

  Further, a protruding wall (guide wall) 21 is formed vertically on the bracket structure 2, the outer surface of the vertical one side wall 27 b of the lower half of the harness protector 3 is guided and positioned along the one side surface 21 a of the protruding wall 21, and Since the outer surface of one horizontal side wall 27c in the upper half of the harness protector 3 is guided and positioned along the upper end surface 21b of the protruding wall 21, the workability of assembling the harness protector 3 to the bracket structure 2 is improved.

  If the locking claw 24 of the bracket structure 2 is not completely engaged with the locking frame piece 29 of the harness protector 3, the wall portion 25 on the front side of the harness protector 3 protrudes from the bracket structure 2. Since it protrudes higher than the surface 21c of the wall 21, incomplete locking of the harness protector 3 is easily and reliably detected. In this case, when the harness protector 3 is pushed again toward the bracket structure 2, the locking claw 24 reliably enters and engages with the engagement frame piece 29. The electrical junction box 1, the bracket structure 2, the harness protector 3, and the wire harness 31 constitute an electrical junction box assembly 33.

  The electrical junction box assembly 33 is fixed to the wall portion (attachment side) inside the instrument panel of the vehicle by the main bracket 17 of the extension portion 16 of the bracket structure 2, for example.

  In the above embodiment, the external wire harness 31 is fixed to the bracket structure 2 with the harness protector 3. However, a wire harness (not shown) derived from the electrical junction box 1 instead of the external wire harness 31 is used. It is also possible to fix the bracket structure 2 with the harness protector 3 in the same manner.

  Moreover, in the said embodiment, although the bracket structure 2 which has the elongate elongated extension part 16 was used, as a bracket structure, a thing one size larger than the electrical junction box 1, or the electrical junction box 1 Some of the parts that protrude outwardly are used, and the part protruding from the electrical junction box 1 is used as an extension. A hole is provided in the extension, and the hole is fixed to the mounting side with a bolt. It is also possible to do.

  Moreover, in the said embodiment, although the wire harness 31 was fixed to the harness fixing | fixed part 30 of the harness protector 3, using the harness protector which does not have the harness fixing | fixed part 30, the wire harness 31 is penetrated through to a certain extent in the longitudinal direction. Is also possible.

  Moreover, in the said embodiment, although the harness protector 3 bent in the substantially L shape (90 degrees) was used, the harness protector bent in the substantially hemispherical shape (obtuse angle) and the substantially V shape (acute angle) are used. It is also possible to use a bent harness protector. The lead-out direction of the wire harness 31 is defined by the harness protector 3 (in the example of FIG. 1, the upper harness portion 31b is led out horizontally, and the lower harness portion 31c is led out in the thickness direction of the electrical junction box 1). . If the lead-out direction of the wire harness 31 is 180 °, it is possible to use a straight harness protector without bending.

  Moreover, in the said embodiment, although demonstrated as a harness attachment structure of the electrical junction box, the structure of this invention is effective also as a harness attachment method to the electrical junction box and a harness routing method.

It is a perspective view which shows one Embodiment of the harness attachment structure of the electrical junction box which concerns on this invention. It is a perspective view which shows one form of an electrical junction box. One form of a bracket structure is shown, (a) is a front perspective view, (b) is a back perspective view. FIG. 4A shows an embodiment of a protector, FIG. 4A is a front perspective view, and FIG. 4B is a rear perspective view along with a wire harness. It is a perspective view which shows one form of the conventional electrical junction box. It is a perspective view which shows one form of the conventional attachment structure of the electrical connection box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Bracket structure 3 Harness protector 15a Wall surface 21 Projection wall 24 Locking claw (locking part)
28 Opening 29 Engagement frame piece (engagement part)
31 Wire harness

Claims (3)

In the structure in which the electrical connection box is fixed to the bracket structure and the bracket structure is fixed to the mounting side, the bracket structure includes a bracket for fixing the electrical connection box to one wall surface side of the board portion, A latch part for fixing a harness protector having a substantially concave cross section on the other wall surface side of the board part, the harness protector having a long opening along the longitudinal direction for inserting the wire harness ; and a both side walls having an engaging portion for engaging portion, in a state where the wire harness from the opening into the harness protector is inserted, the engaging portion is engaged with the engaging portion, the both-side and the distal end surface of the wall contacts the other wall surface of the base plate portion, the harness attached structure of an electrical connection box in which the opening and wherein the busy Garrel in the other wall surface. The harness attachment of the electric junction box according to claim 1, wherein the bracket structure includes a protruding wall having one side surface for positioning and guiding one side wall of the harness protector on the other wall surface side. Construction. In a state where the engaging portion is engaged with the locking portion, the front wall portion intersecting the side wall of the harness protector is located on the same plane as the front wall surface of the protruding wall. The harness-attached structure of the electrical junction box according to claim 2.

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