JP2015126672A - Protector, wire module, and manufacturing method of protector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve protection of a wire and routing of high degree of freedom by a bendable protector while suppressing to be locally recessed.SOLUTION: The protector includes a peripheral wall formed of hollow plate materials having hollow structures formed between a plurality of plate-like parts. In at least a part of the peripheral wall, a bellows structure in which crest parts and valley parts respectively arranged along a circumferential direction are alternately arranged in an axial center direction.

Description

  The present invention relates to a technique for protecting an electric wire.

  A protection member may be attached to a wire harness in a vehicle or the like in order to restrict and protect an electric wire included in the wire harness according to the routing route.

  For example, while the number of wires included in the wire harness tends to increase, the route space for routing the wires tends to narrow. For this reason, when the cross section of the wire harness is circular, it may be difficult to fit the wire harness in a predetermined path space. Therefore, there is a case where the cross-sectional shape of the wire harness is required to be regulated to a shape (for example, a rectangular shape) suitable for being accommodated in a predetermined route space. Further, depending on the wiring harness wiring location, it may be required to protect the electric wire from the metal edge or the like on the vehicle body side. In order to meet such a demand, a protector made of resin or the like may be used as a protective member.

  As a protector as described above, Patent Document 1 discloses that a paperboard sheet material obtained by mixing a pulp fiber material and a waterproof resin solution is folded along a folding line along an axial direction (wire wiring direction). A technique for housing an electric wire is disclosed.

Japanese Patent Laid-Open No. 10-191529

  However, since the protector disclosed in Patent Document 1 uses a paperboard sheet material in which a waterproof resin solution is mixed with a pulp fiber material, the strength is low. For this reason, when a protector receives external force locally like a case where a metal edge etc. are pressed, there exists a problem that a protector may become depressed locally and an electric wire may be damaged. Further, since the wire harness is processed into a shape that can be accommodated, it is difficult to bend the protector, and there is a problem that the degree of freedom in setting the wiring route of the electric wire is reduced.

  The present invention has been made to solve these problems, and provides a technique capable of realizing wire protection and high-degree-of-freedom route setting with a bendable protector while suppressing local depression. The purpose is to do.

  In order to solve the above-described problem, the protector according to the first aspect includes a peripheral wall formed of a hollow plate material in which a hollow structure is formed between a plurality of plate-shaped portions, and at least a part of the peripheral wall, A bellows structure in which crests and troughs extending along the circumferential direction are alternately arranged in the axial direction is formed by pressing.

  The protector which concerns on a 2nd aspect is a protector which concerns on a 1st aspect, Comprising: When the said hollow board | plate material is bend | folded, the said surrounding wall stands | starts up from the both ends of the width direction of the said axial direction in the said peripheral wall from both ends. A pair of side wall portions to be provided is formed.

  The protector which concerns on a 3rd aspect is a protector which concerns on a 2nd aspect, Comprising: At least in the said bellows structure part among the bending parts which make the boundary of the said bottom part and a pair of said side wall part, these several plate-shaped part At least one of them is formed with a cut along the axial direction.

  The electric wire module which concerns on a 4th aspect is provided with the protector which concerns on any one 1st-3rd aspect, and the at least 1 electric wire accommodated in the said protector.

  In the protector manufacturing method according to the fifth aspect, a bellows structure in which peaks and valleys are alternately arranged is formed by pressing on at least a part of a hollow plate in which a hollow structure is formed between a plurality of plate-like portions. A bellows structure forming step; and a peripheral wall forming step of forming a peripheral wall surrounding an accommodation space in which an electric wire can be accommodated by bending the hollow plate member on which the bellows structure is formed.

  A protector manufacturing method according to a sixth aspect is the protector manufacturing method according to the fifth aspect, wherein the peripheral wall forming step uses the hollow plate material on which the bellows structure is formed as a wiring method for the electric wire. A step including a bending step of forming a bottom portion that is long in the wiring direction and a pair of side wall portions that are erected from both ends in the width direction of the bottom portion by bending along the wiring direction.

  A protector manufacturing method according to a seventh aspect is the protector manufacturing method according to the sixth aspect, wherein at least the bellows structure portion of the bent portions forming a boundary between the bottom portion and the pair of side wall portions, Prior to the peripheral wall forming step, further comprising a notch forming step for forming a notch along the wire routing method in at least one of the plurality of plate-like portions, and the bending step of the peripheral wall forming step includes the step of In the incision forming step, the bottom portion and the pair of side wall portions are formed by bending the hollow plate material in the notch formed in the hollow plate material.

  According to the invention according to the first aspect, the protector is bent by the bellows structure formed on at least a part of the peripheral wall by pressing while suppressing the hollow from being locally depressed by the strong hollow plate material. Thereby, protection of an electric wire and path setting with a high degree of freedom can be realized.

  According to the second aspect of the invention, the bottom and the pair of side walls are formed on the peripheral wall of the protector by bending the hollow plate. Therefore, since the protector can be efficiently transported in a plate-like form exhibited by the hollow plate material before the bottom portion and the side wall portion are formed, the transportation cost can be reduced.

  According to the third aspect of the present invention, since at least one plate-like portion of the bent portion of the peripheral wall of the protector is formed with the cut along the axial direction in the at least one plate-like portion, the bottom portion and the side wall due to the bending are formed. Formation with a part becomes easy.

  According to the fourth aspect of the invention, the electric wire module includes the protector according to any one of the first to third aspects, and at least one electric wire accommodated therein. Highly flexible path setting can be realized.

  According to the fifth aspect of the invention, it is possible to manufacture a protector that can be bent by the bellows structure formed on at least a part of the peripheral wall by pressing, while suppressing local depression by a strong hollow plate material. Thereby, protection of an electric wire and path setting with a high degree of freedom can be realized.

  According to the sixth aspect of the invention, a protector having a bottom and a pair of side walls formed on the peripheral wall can be manufactured by bending the hollow plate. Therefore, since the protector can be efficiently transported in a plate-like form exhibited by the hollow plate material before the bottom portion and the side wall portion are formed, the transportation cost can be reduced.

  According to the seventh aspect of the invention, after the cut along the wiring direction of the electric wire is formed in at least one plate-shaped portion in at least the bellows structure portion of the bent portion of the peripheral wall of the protector, the hollow plate material is formed in the cut. Is bent to form a bottom portion and a side wall portion. Therefore, formation of a bottom part and a side wall part becomes easy.

It is a partial notch perspective view which shows the hollow board material which concerns on a 1st example. It is sectional drawing of the hollow board | plate material of FIG. It is a partial notch perspective view which shows the hollow board | plate material which concerns on a 2nd example. It is a partial notch perspective view which shows the hollow board material which concerns on a 3rd example. It is a figure for demonstrating the process which forms a bellows structure in the hollow board | plate material of FIG. It is a perspective view which shows the hollow board material in which the bellows structure was formed in the hollow board material of FIG. It is a figure for demonstrating the process which forms a clearer peak part and trough part in the bellows structure of the hollow board | plate material of FIG. It is a figure for demonstrating the process which forms a notch in the bellows structure of the hollow board | plate material of FIG. It is a schematic perspective view which shows the electric wire module which concerns on 1st Embodiment. It is a figure for demonstrating the process which forms a notch in the plate-shaped part of the hollow plate material of FIG. It is a schematic perspective view which shows the electric wire module which concerns on 2nd Embodiment.

<Common embodiment>
Hereinafter, the electric wire module according to the embodiment will be described.

  An electric wire module is a wiring material built into a vehicle, and includes a protector and a single electric wire or wire harness. The wire harness includes a plurality of electric wires. That is, the electric wire module includes a protector and at least one electric wire.

  The protector includes a peripheral wall formed by a hollow plate material in which a hollow structure is formed between a plurality of plate-like portions. The space surrounded by the peripheral wall is an accommodation space that can accommodate at least one electric wire. The material for forming the hollow plate material is not particularly limited, and may be formed of a resin such as PP (polypropylene) or may be formed of paper. In such a hollow plate material, since a plurality of plate-like members are arranged at intervals through the hollow structure, it is difficult to bend, and the strength can be improved by the structure forming the hollow structure. . For this reason, the hollow plate material is excellent in strength. In addition, since a hollow structure exists in the hollow plate material, weight reduction and material reduction can be achieved.

  At least a part of the peripheral wall formed by the hollow member, more specifically, at least a part of the peripheral wall in the axial direction of the protector has a peak portion and a trough portion extending along the circumferential direction of the protector, respectively. A bellows structure arranged alternately in the direction is formed. The bellows structure is formed by pressing a hollow plate material.

  An electric wire module is configured by accommodating at least a part of at least one electric wire in the protector. The protector has a role of protecting each electric wire accommodated in the accommodating space surrounded by the peripheral wall from the outside (for example, an edge portion around the wiring route), a role of maintaining the electric wires along a predetermined wiring route, It plays the role etc. which maintain the cross-sectional shape of the wire harness containing a some electric wire in the shape according to the path | route space in a wiring path | route.

  This protector is bent by an accordion structure formed on at least a part of the peripheral wall while suppressing hollowing locally by a strong hollow plate material. Thereby, the protector can protect the accommodated electric wire while maintaining the path shape formed by the axial center of the protector. That is, it is possible to realize the protection of the electric wires and the route setting with a high degree of freedom.

  As a structure for accommodating an electric wire in the protector, for example, a structure in which a protector is formed by bending a hollow plate material into a shape that can accommodate at least one electric wire, and a wire harness is accommodated in the protector. Specifically, for example, a configuration in which a bottom portion that is long in the axial center direction of the protector and a pair of side wall portions that are erected from both ends in the width direction of the bottom portion is formed on the peripheral wall of the protector by bending the hollow plate material. Can be mentioned.

  Thus, according to the structure of the protector in which the accommodation space is formed, the protector can be efficiently transported in a plate-like form exhibited by the hollow plate material. For example, the plurality of protectors can be efficiently transported by overlapping and transporting the protectors in a plate-like form exhibited by the hollow plate material before the bottom portion and the side wall portions are formed, so that the transportation cost can be reduced.

  Further, since the hollow plate material is provided with a plurality of plate-like members spaced apart through the hollow structure, it is difficult to bend, and the bellows structure portion in which the peaks and valleys are alternately arranged in the axial direction is In addition, it is difficult to bend. Therefore, the hollow plate material constituting the protector may be cut so that the work of forming the bottom portion and the pair of side walls on the peripheral wall can be performed more easily by bending the hollow plate material on which the bellows structure is formed. As a configuration of a protector that can be assembled by folding such a hollow plate material, for example, a plurality of plates constituting the hollow plate material at least in the bellows structure portion among the bent portions of the peripheral wall that forms the boundary between the bottom portion and the pair of side wall portions. In this case, at least one of the shaped portions is provided with a cut along the axial direction. The protector makes it easier to form the bottom and side walls by bending the hollow plate material in the notch formed along the axial direction, that is, the wire routing direction, compared to the case where the notch is not formed. It becomes. In addition, even if the said notch | incision is not formed, since a bottom part and a side wall part can be formed in a surrounding wall by bending a hollow board | plate material, the usefulness of this invention is not impaired.

  The protector is formed of a hollow plate material. For example, a protector can be formed by forming a hollow plate material having a uniform structure and expanding greatly, and cutting or bending the hollow plate material as appropriate. For this reason, a protector can be manufactured at low cost.

<Hollow plate material>
In describing the wire harness with protector more specifically, the hollow plate material for constituting the protector will be described.

  FIG. 1 is a partially cutaway perspective view showing a hollow plate 10 as a first example of a hollow plate. FIG. 2 is a sectional view of the hollow plate 10.

  The hollow plate member 10 is a member formed of a resin material, and includes a plurality of (here, two) plate-like portions 12 and a plurality of interposition portions 16 interposed between the plate-like portions 12, and a ladder shape. It is formed in a shape having a cross section. More specifically, the plate-like part 12 is formed in a flat plate shape. The plurality of plate-like parts 12 are connected via a plurality of interposition parts 16 in a state of being spaced apart from each other.

  Each of the plurality of interposition portions 16 is formed in an elongated plate shape, and is provided between the plurality of plate portions 12 in a parallel state with a space between each other. The extending directions of the interposition portions 16 are in a positional relationship parallel to each other. Each interposition part 16 may be curved or may be bent at a predetermined angle. In the example shown in FIG. 1, each interposition part 16 is in a posture orthogonal to the plate parts 12 on both sides and sandwiched between the plate parts 12 on both sides, It is integrally molded.

  For this reason, when the hollow plate 10 is cut along a plane orthogonal to the extending direction of the interposition part 16, a ladder-like cross section in which a plurality of interposition parts 16 extend between the pair of plate-like parts 12 is shown (FIG. 2).

  Such a hollow plate material 10 can be continuously manufactured by, for example, an extrusion molding apparatus that extrudes a resin from an extrusion hole corresponding to a ladder-like cross section, thereby easily manufacturing the hollow plate material 10 at low cost. can do.

  According to such a hollow plate member 10, since the plurality of plate-like portions 12 are connected by the interposition portions 16 at intervals, it is difficult to bend. Further, since the interposition part 16 is interposed between the plate-like parts 12, the hollow plate material 10 is also reinforced by the interposition part 16 so that it is difficult to bend and dent. Therefore, this hollow plate material 10 is excellent in strength. In addition, since a hollow structure is formed between the plurality of plate-like portions 12 of the hollow plate member 10, the weight can be reduced and the material cost can be reduced accordingly.

  In addition, the interposition part which interposes between several plate-shaped parts and forms a hollow structure may form another hollow shape. For example, between a plurality of plate-like portions, the intervening portion between them may form a polygonal hollow shape such as a triangular prism, and may form a honeycomb structure in particular.

  FIG. 3 is a partially cutaway perspective view showing a hollow plate 10A as a first example of the hollow plate.

  The hollow plate member 10A includes a plurality (here, two) of plate-like members 12A and an intervening member 16A sandwiched between the plurality of plate-like members 12A.

  The material forming the plurality of plate-like members 12A and the interposing members 16A is not particularly limited. The plurality of plate-like members 12A and the interposition members 16A may be formed of paper, may be formed of resin, or may be configured by a combination thereof. When at least one of the plurality of plate-like members 12A and the intervening member 16A is formed of paper, it is preferable to perform a water repellent treatment or the like on the surface.

  The plate-like member 12A is formed in a flat plate shape. A plurality of plate-like members 12A are connected in a state of being spaced apart via an intervening member 16A.

  The interposition member 16A is a member formed in a plate shape having an uneven shape. The interposed member 16A is joined to the inward surface of the plate member 12A in a state where the interposed member 16A is sandwiched between the plurality of plate members 12A. The joining of the plate-like member 12A and the interposition member 16A is performed by, for example, an adhesive or a pressure sensitive adhesive. Thereby, the hollow structure according to the uneven | corrugated shape which 16 A of interposition members exhibit is formed among several plate-shaped member 12A.

  Here, the interposition member 16A is formed in a shape in which a peak portion 16a and a valley portion 16b are continuous in a wave shape. The extending direction of the peaks 16a and the extending direction of the valleys 16b are in a parallel positional relationship. Therefore, when the interposed member 16A is viewed in plan, the plurality of peaks 16a and the plurality of valleys 16b are alternately arranged. It is set as the structure formed in parallel. The top part of the peak part 16a and the bottom part of the valley part 16b may be curved, or may be bent at a predetermined angle.

  Then, the interposition member 16A is sandwiched between the plurality of plate-like members 12A, the lower surface of the bottom portion of the valley portion 16b and the lower plate-like member 12A are joined, and the upper surface and the upper side of the top portion of the peak portion 16a. The plate-like member 12A is joined.

  According to such a hollow plate material 10 </ b> A, the plurality of plate-like members 12 </ b> A are connected by the interposition member 16 </ b> A at intervals, and thus are not easily bent like the hollow plate material 10. In addition, since the interposition member 16A is interposed between the plate-like members 12A, the interposition member 16A also reinforces the hollow plate material 10A so that it is difficult to bend and dent. In particular, in this example, it is possible to make the hollow plate material difficult to bend in the extending direction of the peak portion 16a and the valley portion 16b. Therefore, this hollow plate 10A is also excellent in strength.

  Further, since a hollow structure is formed between the plurality of plate-like members 12A of the hollow plate member 10A, it is possible to reduce the weight and the material cost accordingly.

  The interposed member 16A can be formed, for example, by sandwiching a flat plate member between press dies having an uneven surface. For example, a flat plate-like member having a belt shape is continuously supplied along a predetermined conveyance path, and a pair of rollers is disposed along the conveyance path. An uneven shape is formed on the surface of the pair of rollers. And while interposing the flat plate-shaped member which makes | forms a strip | belt along a predetermined | prescribed conveyance path, the said interposing member 16A is formed continuously by pinching | interposing the said flat plate-shaped member with a pair of roller. be able to.

  Further, a pair of strip-shaped plate members 12A are continuously supplied along the predetermined conveying path to the downstream side of the pair of rollers, and the interposition member 16A is interposed between the pair of strip-shaped plate members 12A. Are sequentially inserted and joined with an adhesive or the like. Thereby, the hollow plate 10A can be continuously manufactured.

  FIG. 4 is a partially cutaway perspective view showing a hollow plate 10B as a second example of the hollow plate.

  The hollow plate member 10B is different from the hollow plate member 10A in that an interposed member 16B is used instead of the interposed member 16.

  That is, the interposed member 16B is a member formed in a plate shape having an uneven shape, and more specifically, a configuration in which a plurality of protrusions 17 are formed so as to be scattered in a plan view of the interposed member 16B. Has been. Here, in a state in which the interposed member 16B is viewed in plan, the plurality of protrusions 17 are formed so as to be arranged at regular intervals in the vertical and horizontal directions. The projecting portion 17 is formed so as to protrude toward the one main surface side from the substrate portion 18 extending in a flat plate shape in the interposition member 16B, and has a shape in which the upper end portion of the cylinder is closed. Here, the protrusion 17 is formed in a shape that gradually narrows upward, that is, a frustum shape. The protrusion 17 may be formed in a truncated cone shape, may be formed in a truncated pyramid shape, or may be formed in a shape obtained by rounding the corners of the truncated pyramid.

  Then, the interposition member 16B is sandwiched between the plurality of plate-like members 12A, the lower surface of the substrate portion 18 is joined to the lower plate-like member 12A, and the top portion of the protrusion 17 is joined to the upper plate-like member. Yes.

  According to such a hollow plate material 10B, as in the case of the hollow plate material 10A, it is excellent in strength and can be reduced in weight. In particular, since the hollow plate member 10B includes a plurality of interspersed protrusions 17, the directionality of difficulty in bending can be eliminated. In addition, what combined two said interposition members 16B may be used as an interposition member.

  In particular, according to the hollow plate materials 10A and 10B, if the interposition members 16A and 16B exhibiting an uneven shape are sandwiched between a plurality of plate-like members, a hollow structure can be formed therein, so that the hollow plate material 10A, There is an advantage that 10B can be manufactured easily.

  In addition, it is preferable that the thickness dimension of hollow board | plate material 10, 10A, 10B is about 1.5 mm-15.0 mm.

  Moreover, in the type in which the spaces are formed in parallel like the hollow plate members 10 and 10A, it is preferable that the pitch of the part that partitions the spaces formed in parallel is about 4 mm to 20 mm.

  Further, in a type in which a hollow space is formed by scattered protrusions such as the hollow plate member 10B, the pitch of each protrusion is preferably about 2 mm to 6 mm.

  An electromagnetic shield member such as a metal foil (aluminum foil) may be provided on at least a part of each of the hollow plate materials described above.

  Moreover, when each hollow plate material includes three or more plate-like portions (plate-like members), it is preferable that an intervening portion (intervening member) is provided between them. Thereby, the intensity | strength of a hollow plate material can be improved more.

  Each electric wire module using the hollow plate material 10 as the electric wire module according to the first embodiment and the electric wire module according to the second embodiment using the hollow plate material as described above and the manufacturing method thereof will be described in detail below. .

<First Embodiment>
FIG. 5 is a diagram for explaining the process of forming the bellows structure 30 on the hollow plate 10. FIG. 6 is a perspective view showing the hollow plate member 20 in which the bellows structure 30 is formed on the hollow plate member 10.

  FIG. 5 shows the hollow plate 10 that is sandwiched between a lower mold 91 and an upper mold 92 that can be pressed to form the bellows structure 30. A bellows structure that can be fitted to each other is formed on the inner surfaces of the lower die 91 and the upper die 92 facing each other. Each peak part and each valley part in each bellows structure of the lower mold | type 91 and the upper mold | type 92 are extended in the fixed direction. The hollow plate 10 has a lower mold 91 and an upper mold so that the extending direction of each hollow structure is preferably parallel to the extending direction of the lower mold 91 and the crests and troughs of the upper mold 92. 92.

  When the lower die 91 and the upper die 92 move so as to approach each other with the hollow plate member 10 sandwiched therebetween, the lower die 91 and the upper die 92 contact the hollow plate member 10 respectively. When the lower mold 91 and the upper mold 92 are moved closer to each other, the hollow plate 10 is pressed by the lower mold 91 and the upper mold 92. By this pressing, the hollow plate member 10 becomes the hollow plate member 20 including the bellows structure 30 corresponding to the bellows structure of the lower die 91 and the upper die 92 (see FIG. 6). In other words, the bellows structure 30 of the hollow plate member 20 is formed by alternately arranging the crests 31 and the troughs 32, and the extending directions of the crests 31 and the troughs 32 are the lower mold 91 and the upper mold. It becomes the same direction as the extending direction of each peak part and each trough part of each bellows structure of 92.

  By pressing, the hollow plate member 20 is strongly creased along the tops of the peaks 31 and the bottoms of the valleys 32 of the lower mold 91 and the upper mold 92. Even after the hollow plate member 20 is removed from the lower die 91 and the upper die 92, the folding plate forming the peak portions 31 and the valley portions 32 of the bellows structure 30 remains strongly in the hollow plate member 20. When the hollow plate 10 formed of resin is pressed by the lower die 91 and the upper die 92, the hollow plate 10 may be heated.

  The hollow plate member 10 is disposed with respect to the lower mold 91 and the upper mold 92 so that the extending direction of each hollow structure is parallel to the extending direction of each of the crests and troughs of the lower mold 91 and the upper mold 92. When the hollow plate member 10 is pressed, the extending directions of the peak portions 31 and the valley portions 32 of the bellows structure 30 formed in the pressed hollow plate member 20 are the plurality of plate-like portions 12 of the hollow plate member 10. The extending direction of each hollow structure formed between the two, that is, the extending direction of each interposition part 16 is the same direction. When the hollow plate 10 is bent along a line along the extending direction of the interposition part 16, it is more easily bent than when it is bent along a line along a direction perpendicular to the extending direction. Therefore, the crease between the peak portion 31 and the valley portion 32 of the bellows structure 30 in the hollow plate member 20 can be left stronger.

  In the state in which the hollow plate member 10 is arranged so that the extending direction of each hollow structure of the hollow plate member 10 is different from the extending direction of each crest and each trough of the lower die 91 and the upper die 92, Accordingly, a bellows structure may be formed in the hollow plate member 10. In the example of FIG. 6, the bellows structure 30 is formed on a part of the main surface of the hollow plate member 20, but the bellows structure 30 may be formed over the entire main surface of the hollow plate member 20.

  FIG. 7 is a side view of the hollow plate 20 for explaining a process for forming a crease stronger in the peak portion 31 and the valley portion 32 of the bellows structure 30 of the hollow plate member 20. In the processing example shown in FIG. 7, the hollow plate member 20 is an external force that compresses the bellows structure 30 from both sides of the bellows structure 30 along a direction orthogonal to the extending direction of the peak portion 31 and the valley portion 32 in a side view. Has been added and pressed. Thus, if the bellows structure 30 is formed on the hollow plate 20 by pressing with the lower die 91 and the upper die 92 and then further pressed in the direction in which the bellows structure 30 is contracted (the direction in which it is compressed), the peak portion 31 and the valley portion The fold with 32 is well formed. Note that the latter pressing shown in FIG. 7 may not be performed.

  FIG. 8 is a diagram for explaining a process of forming a cut in the bellows structure 30 of the hollow plate member 20 using the cutting blade 71. The hollow plate member 20 is further formed with a plurality of cuts in the bellows structure 30. Each notch is formed along each bent portion of the protector 50A so as to be easily bent when the protector 50A (FIG. 9) is formed by bending the hollow plate member 20.

  In the example of FIG. 8, each notch formed in the hollow plate member 20 is formed along each line orthogonal to the extending direction of each peak portion 31 and each valley portion 32 of the bellows structure 30. Specifically, the cutting blade 71 in a posture perpendicular to the main surface of the hollow plate member 20 cuts a part of the bellows structure 30 along each line, whereby a cut is formed in the bellows structure 30.

  In each line, the cutting edge 71 is pressed against the bellows structure 30 from the surface side (in FIG. 8, the mountain portion 31 side) which is the outer peripheral surface of the peripheral wall 40a of the protector 50A among the two main surfaces of the hollow plate member 20. Each cut is formed by cutting the bellows structure 30 in the thickness direction of the hollow plate 20. The bellows structure 30 is not completely cut in the thickness direction of the hollow plate 20. The bottom of the valley 32, that is, the inner peripheral side of the protector 50A is left without being cut.

  After the bellows structure 30 is formed, each cut is formed in the bellows structure 30 by a cutting machine having the same number of cutting blades 71 as the bent portion of the peripheral wall 40a. Prior to the formation of the bellows structure 30, a perforated cut that crosses a portion that becomes the peak portion 31 of the bellows structure 30 may be formed in the hollow plate 10. Further, for example, a cutting blade is provided on each inner surface of the lower die 91 and the upper die 92 (FIG. 5), and when forming the bellows structure 30 by pressing, each notch that becomes a bent portion of the protector 50A is formed. Also good. If a cut is formed in the bellows structure 30, the hollow plate member 20 can be easily bent at the cut.

  Even if the notch is not formed in the bellows structure 30, the bellows structure 30 can be bent, for example, by strongly pressing the bent portion of the hollow plate 20 against the folding table. Therefore, even if the notch is not formed in the bellows structure 30, the usefulness of the present invention is not impaired.

  FIG. 9 is a schematic perspective view showing the electric wire module 60A according to the first embodiment. The electric wire module 60A includes a protector 50A formed by bending the hollow plate member 20, and a wire harness W housed in a housing space surrounded by the peripheral wall 40a of the protector 50A. The peripheral wall 40a is constituted by the hollow plate 20 (the pressed hollow plate 10). The space surrounded by the peripheral wall 40a is an accommodation space in which the wire harness W can be accommodated. Here, the wire harness W is configured by bundling a plurality of electric wires, but instead of the wire harness W, one electric wire may be accommodated in the protector 50A.

  The peripheral wall 40a of the protector 50A includes a bottom 41a that is long in the axial direction of the protector 50A, that is, the wiring direction of the wire harness W, and a pair of side walls 42a and 43a that are erected from both ends in the width direction of the bottom 41a. . The bottom 41a is further provided with an extended piece 45a connected to the side wall 42a and facing the bottom 41a, and a lid 44a connected to the side wall 43a and overlapped with the extended piece 45a. Yes.

  The extension piece 45a and the lid portion 44a are joined to each other by an adhesive. Thereby, the bent shape of the peripheral wall 40a of the protector 50A is maintained. The shape of the peripheral wall 40a may be maintained by, for example, winding an adhesive tape around the peripheral wall 40a that houses the wire harness W. Moreover, the surrounding wall 40a does not need to be provided with the extension piece 45a and the cover part 44a, for example. In this case, the housing space is maintained by, for example, tape-fixing the peripheral wall 40a in a state where the wire harness W is housed in the housing space surrounded by the bottom portion 41a and the pair of side wall portions 42a and 43a.

  A bellows structure 30a in which peaks 31a and valleys 32a extending along the circumferential direction of the protector 50A are alternately arranged in the axial direction is formed on a part of the peripheral wall 40a in the axial direction of the protector 50A. . The bellows structure 30a is formed by bending the bellows structure 30 of the hollow plate material 20 formed by pressing the hollow plate material 10 along a line along the axial direction.

  The protector 50 </ b> A can suppress local depression by the strong hollow plate 20. Moreover, since the bellows structure 30a is formed in the surrounding wall 40a, the protector 50A is bent by applying an external force so that the both ends of the protector 50A approach each other, for example. Therefore, the protector 50A can protect the housed wire harness W while maintaining the path shape formed by the axis of the protector 50A.

  Each notch 47a is formed in the bellows structure 30a portion among the bent portions 46a that form the boundary between the bottom portion 41a and the pair of side wall portions 42a and 43a. In addition, each notch 47a is formed in the bellows structure 30a portion at a bent portion that forms a boundary between the side wall portion 42a and the extending piece 45a and a bent portion that forms a boundary between the side wall portion 43a and the lid portion 44a.

  Each notch 47a is formed along the axial center direction of the protector 50A. Each cut 47 a is each cut formed by the cutting blade 71 in the bellows structure 30 of the hollow plate 20. The bellows structure 30a is formed with a pair of cross sections that sandwich the cuts 47a with respect to the respective cuts 47a. Of the pair of cross sections, the portions on the outer peripheral surface side of the peripheral wall 40a are separated from each other along the circumferential direction of the peripheral wall 40a, so that the bellows structure 30a can be easily bent.

  The notches 47a direct both of the plurality of plate-like portions 12 of the hollow plate member 20 from the peak portion 31 side (the outer peripheral surface side of the peripheral wall 40a) of the bellows structure 30 to the valley portion 32 side (the inner peripheral surface side of the peripheral wall 40a). However, the plurality of plate-like parts 12 are not cut at the bottom of the valley part 32. By the portions that remain without being cut, in each of the cuts 47a of the peripheral wall 40a, two surfaces sandwiching the cut 47a are connected. Therefore, the shape of the peripheral wall 40a that forms the accommodation space is maintained.

Second Embodiment
FIG. 10 is a view for explaining a process of forming a cut in the plate-like portion of the hollow plate material 10. FIG. 11 is a schematic perspective view showing an electric wire module 60B according to the second embodiment. The electric wire module 60 </ b> B includes a peripheral wall 40 b formed by the hollow plate material 10 in which a cut is formed, and a wire harness W accommodated in an accommodating space surrounded by the peripheral wall 40 b.

  As shown in FIG. 10, cuts are formed by cutting blades 72 on both surfaces of the hollow plate member 10, that is, one of the plural (here, two) plate-like portions 12. The cuts become the cuts 47b formed in the peripheral wall 40b of the protector 50B when the hollow plate 10 is bent. The plate-like part 12 in which the cut is formed forms an outer peripheral surface of the peripheral wall 40b of the protector 50B. The cut is formed at least over the entire length of the bellows structure 30 along the axial direction. The cut may be formed over the entire length of the hollow plate 10 along the axial direction.

  The plate-like portion 12 in which the cutting by the cutting edge 71 is not formed forms the inner peripheral surface of the peripheral wall 40b. Further, the plurality of interposition portions 16 that connect the plate-like portions 12 may also be cut by the cutting blade 72. That is, the cut may reach not only the one plate-like portion 12 but also the interposition portion 16.

  The hollow plate 10 formed with the cutting blade 72 is pressed by the lower die 91 and the upper die 92 to become the hollow plate 20 having the bellows structure 30 (see FIGS. 5 and 6). The pressing process described with reference to FIG. 7 may be further performed on the bellows structure 30.

  The electric wire module 60B includes a protector 50B formed by bending the hollow plate member 20, and a wire harness W housed in a housing space surrounded by the peripheral wall 40b of the protector 50B. The peripheral wall 40b is configured by the hollow plate member 20 (the pressed hollow plate member 10) in which each cut formed by the cutting blade 72 is formed. In the accommodation space surrounded by the peripheral wall 40b, at least one electric wire (in the example of FIG. 11, the wire harness W) is accommodated.

  The peripheral wall 40b includes a bottom portion 41b that is long in the axial direction of the protector 50B, that is, the wiring direction of the wire harness W, and a pair of side wall portions 42b and 43b that are erected from both ends in the width direction of the bottom portion 41b. The bottom portion 41b is further provided with an extension piece 45b connected to the side wall portion 42b and facing the bottom portion 41b, and a lid portion 44b connected to the side wall portion 43b and overlapped with the extension piece 45b. Yes.

  For example, the extension piece 45b and the lid portion 44b are joined in the same manner as the extension piece 45a and the lid portion 44a of the protector 50A, so that the bent shape of the peripheral wall 40b forming the accommodation space is maintained.

  A bellows structure 30b is formed in a part of the peripheral wall 40b in the axial direction of the protector 50B. The ridges 31b and the valleys 32b extending along the circumferential direction of the protector 50B are alternately arranged in the axial direction. . The bellows structure 30b is formed by bending the bellows structure 30 of the hollow plate material 20 formed by pressing the hollow plate material 10 along a line along the axial direction.

  Similarly to the protector 50A, the protector 50B can suppress local depression by the strong hollow plate 20. Moreover, since the bellows structure 30b is formed in the surrounding wall 40b, the protector 50B is bent by giving an external force so that the both ends of the protector 50B may mutually approach, for example. Therefore, the protector 50B can protect the housed wire harness W while maintaining the path shape formed by the axis of the protector 50B.

  Each notch 47b is formed in the bellows structure 30b portion of each bent portion 46b that forms a boundary between the bottom portion 41b and the pair of side wall portions 42b and 43b. In addition, each notch 47b is formed in the bellows structure 30b portion at the bent portion that forms the boundary between the side wall portion 42b and the extending piece 45b and the bent portion that forms the boundary between the side wall portion 43b and the lid portion 44b.

  Each cut 47b is formed along the axial direction of the protector 50B. Each cut 47 b is each cut formed in the hollow plate 10 by the cutting blade 72. Each notch 47b facilitates bending of the bellows structure 30b.

  The notch 47b is formed in the thickness direction over the entire length of the bellows structure 30b in the axial direction at least on the outer peripheral surface of the peripheral wall 40b among the plurality of plate-like portions 12 of the hollow plate member 20 forming the peripheral wall 40b. It is formed by cutting into pieces. In each of the cuts 47b of the peripheral wall 40b, the two surfaces of the peripheral wall 40b sandwiching the cut 47b are not cut among the plurality of plate-like parts 12 (the plate-like part 12 forming the inner peripheral surface of the peripheral wall 40b). Are connected to each other. Therefore, the shape of the peripheral wall 40b that forms the accommodation space is maintained.

  As described by taking the cuts 47a and 47b of the protectors 50A and 50B as an example, at least one of the plurality of plate-like portions 12 constituting the hollow plate member 20 as the cut provided in the bent portion of the peripheral wall of the protector according to the embodiment. Incisions formed along the axial direction of the protector are employed.

  In protector 50A (50B), bellows structure 30a (30b) is formed in a part of peripheral wall 40a (40b) in the axial direction. The portion of the peripheral wall 40a (40b) where the bellows structure 30a (30b) is not formed is difficult to bend due to the structure of the strong hollow plate 20 that forms the peripheral wall 40a (40b). It has a function to hold firmly (path holding function). On the other hand, the portion of the peripheral wall 40a (40b) where the bellows structure 30a (30b) is formed has flexibility, and the wiring route of the wire harness W can be easily changed. Accordingly, since one protector 50A (50B) can have both a path holding function and flexibility, the number of parts can be reduced. The bellows structure 30a (30b) may be formed over the entire area of the peripheral wall 40a (40b) in the axial direction.

  Further, the protector 50A (50B) is formed by processing the hollow plate material 10, but may be formed by processing the hollow plate material 10A or 10B, for example. When the hollow plate member 10A is used, the extending direction of the hollow structure and the extending directions of the peaks and valleys of the bellows structure 30a (30b) formed in the protector 50A (50B) are the same direction. Preferably there is.

  According to the protector 50A (50B) according to the first (second) embodiment configured as described above, the protector 50A (50B) suppresses local depression by a strong hollow plate material, It is bent by the bellows structure 30a (30b) formed on at least a part of the peripheral wall 40a (40b) by pressing the hollow plate material. Thereby, protection of an electric wire and path setting with a high degree of freedom can be realized.

  Further, according to the protector 50A (50B) according to the first (second) embodiment configured as described above, the bottom 41a is formed on the peripheral wall 40a (40b) of the protector 50A (50B) by bending the hollow plate material. (41b) and a pair of side wall portions 42a and 43a (42b and 43b) are formed. Accordingly, the protector 50A (50B) can be efficiently transported in a plate-like form exhibited by the hollow plate material before the bottom 41a (41b) and the side walls 42a, 43a (42b, 43b) are formed. Thereby, transportation cost can be reduced.

  Moreover, according to the protector 50A (50B) according to the first (second) embodiment configured as described above, at least the bellows of the bent portion 46a (46b) of the peripheral wall 40a (40b) of the protector 50A (50B). In the structure 30a (30b), at least one plate-like portion 12 is formed with a cut 47a (47b) along the axial direction, so that the bottom 41a (41b) and the side walls 42a and 43a (42b and 43b) are bent. ).

  Further, according to the electric wire module 60A (60B) according to the first (second) embodiment configured as described above, the protector 50A (50B) and at least one electric wire accommodated are provided. It is possible to realize the protection of electric wires and the route setting with a high degree of freedom.

  Moreover, according to the manufacturing method of the protector 50A (50B) according to the first (second) embodiment as described above, the depression of the peripheral wall is suppressed by the press while the local hollow is suppressed by the strong hollow plate member 20. The bendable protector 50A (50B) can be manufactured by the bellows structure 30a (30b) formed at least in part. Thereby, protection of an electric wire and path setting with a high degree of freedom can be realized.

  Moreover, according to the manufacturing method of the protector 50A (50B) according to the first (second) embodiment as described above, the bottom 41a (41b) and the pair of side walls are formed on the peripheral wall 40a (40b) by bending the hollow plate member. The protector 50A (50B) in which the portions 42a and 43a (42b and 43b) are formed can be manufactured. Accordingly, the protector 50A (50B) can be efficiently transported in a plate-like form exhibited by the hollow plate material before the bottom 41a (41b) and the side walls 42a, 43a (42b, 43b) are formed. Therefore, the transportation cost can be reduced.

  Moreover, according to the manufacturing method of the protector 50A (50B) according to the first (second) embodiment as described above, at least the bellows of the bent portion 46a (46b) of the peripheral wall 40a (40b) of the protector 50A (50B). In the structure 30a (30b), at least one plate-like portion 12 is formed with a cut 47a (47b) along the direction of the electric wire, and then the bottom 41a (41b) is formed by bending the hollow plate material at the cut 47a (47b). ) And side wall portions 42a and 43a (42b and 43b). Therefore, formation of the bottom 41a (41b) and the side walls 42a and 43a (42b and 43b) is facilitated.

  Although the invention has been shown and described in detail, the above description is illustrative in all aspects and not restrictive. Therefore, embodiments of the present invention can be modified or omitted as appropriate within the scope of the invention.

60A, 60B Electric wire module 50A, 50B Protector 10, 10A, 10B, 20 Hollow plate 12 Plate-like part 12A Plate-like member 16 Interposition part 16A, 16B Interposition member 30, 30a, 30b Bellows structure 31, 31a, 31b Mountain part 32, 32a, 32b Valley part W Wire harness 40a, 40b Peripheral wall 41a, 41b Bottom part 42a, 43a, 42b, 43b Side wall part 44a, 44b Lid part 45a, 45b Extension piece 46a, 46b Bending part 47a, 47b Cutting 71, 72 Cutting edge 91 Lower mold 92 Upper mold

Claims (7)

  A peripheral wall formed by a hollow plate material in which a hollow structure is formed between a plurality of plate-like portions, and at least a part of the peripheral wall has a peak portion and a valley portion extending along the circumferential direction, respectively. A protector, in which the bellows structures that are alternately arranged are formed by pressing. The protector according to claim 1,
The protector, wherein the hollow plate member is bent to form a bottom portion that is long in the axial direction and a pair of side wall portions that are erected from both ends in the width direction of the bottom portion. The protector according to claim 2,
In at least the bellows structure portion of the bent portion forming the boundary between the bottom portion and the pair of side wall portions, a cut along the axial direction is formed in at least one of the plurality of plate-like portions. Protector. The protector according to any one of claims 1 to 3, and
At least one electric wire housed in the protector;
An electric wire module. A bellows structure forming step for forming a bellows structure in which at least a portion of the hollow plate material in which a hollow structure is formed between a plurality of plate-like portions is alternately arranged with peaks and valleys by pressing; and
A peripheral wall forming step for forming a peripheral wall surrounding an accommodation space capable of accommodating an electric wire by bending the hollow plate material in which the bellows structure is formed;
A method for manufacturing a protector. It is a manufacturing method of the protector according to claim 5,
The peripheral wall forming step includes:
By bending the hollow plate material in which the bellows structure is formed along the wiring method of the electric wire, a bottom portion long in the wiring direction and a pair of side wall portions standing from both ends in the width direction of the bottom portion are formed. A method of manufacturing a protector, the step including a bending step. It is a manufacturing method of the protector according to claim 6,
Cuts that form cuts along the wiring arrangement method in at least one of the plurality of plate-like portions in at least the bellows structure portion of the bent portions that form a boundary between the bottom portion and the pair of side wall portions. Further comprising a forming step prior to the peripheral wall forming step,
The bending step of the peripheral wall forming step is:
The protector manufacturing method, which is a step of forming the bottom portion and the pair of side wall portions by bending the hollow plate material in the notch formed in the hollow plate material in the notch forming step.

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