JP2021016265A - Protector, method for manufacturing the same, and wire harness - Google Patents

Abstract

To provide a protector for preventing abnormal noise from being generated by a route material sliding in the protector in contact with burrs generated on an inner peripheral surface of the protector, a method of manufacturing the same, and a wire harness.SOLUTION: A protector includes a housing space unit that houses a route material W and in which the route material W slides in a sliding direction, and a housing member having an inner peripheral surface 13a for forming the housing space unit. The housing member is partitioned into a first region 15 and a second region 16 with a boundary portion 19 interposed in an extending direction of the housing member. A recessed portion 17 is formed in the inner peripheral surface 13a across the first region 15 and the second region 16. The boundary portion 19 is formed in a bottom 17a of the recessed portion 17. A depth D of the recessed portion 17 is formed to be longer than an amount of protrusion T of the boundary portion 19.SELECTED DRAWING: Figure 7

Description

The present invention relates to a protector, a method for manufacturing the protector, and a Wyharness.

Vehicles such as automobiles are equipped with slide seats that slide freely on rails. When the slide sheet is provided with electrical components, a power supply device for supplying electric power to the electrical components from a power source such as a battery mounted on the vehicle is provided. The power supply device includes a wire harness for electrically connecting the power supply and the electrical equipment and a case for accommodating the wire harness, and the wire harness is accommodated in the case or pulled out from the case according to the movement of the slide sheet. (See, for example, Patent Document 1).

Patent Document 1 discloses that the main mold for manufacturing the upper cover in the two types of cases is shared, and two types of insert molds are prepared for the base in the two types of cases. Has been done.

JP-A-2018-102026

By the way, the above case is molded by exchanging two types of insert piece molds for a common main mold, but on the inner peripheral surface of the case, the portion where the main mold and the insert piece molds are combined. Burr is likely to occur in the mold matching part molded in. A wire harness wound around a corrugated tube may be housed in the case, for example. Since this wire harness slides inside the case as the slide sheet moves, if the burr generated on the inner peripheral surface of the case and the corrugated tube are crossed and slide, abnormal noise may occur. There is room for improvement in terms of the commercial value of the vehicle.

The present invention provides a protector, a method for manufacturing the protector, a method for manufacturing the protector, and a wire harness, which prevent the wiring material sliding inside the protector from coming into contact with burrs generated on the inner peripheral surface of the protector to generate abnormal noise. The purpose is to provide.

In order to achieve the above object, the method for manufacturing a protector according to the present invention forms an accommodation space portion that accommodates a wiring material and slides the wiring material in a sliding direction, and the accommodation space portion. A method for manufacturing a protector including an accommodating member having an inner peripheral surface, wherein a first region of the accommodating member is molded by a first mold among molds for molding the accommodating member, and a second mold is used. A molding step of molding a second region of the accommodating member is provided, and the first mold is a first convex protruding from an end facing the second mold in a direction orthogonal to the extending direction of the accommodating member. The second mold has a portion, and the second mold projects in a direction orthogonal to the extending direction from an end portion adjacent to the first convex portion and facing the first mold in the extending direction. It has a second convex portion, and in the molding step, the first convex portion and the second convex portion mold a concave portion extending in a direction intersecting the sliding direction with respect to the inner peripheral surface. , The depth of the concave portion is molded so as to be longer than the protrusion amount of the boundary portion between the first region and the second region molded by the boundary between the first convex portion and the second convex portion. It is characterized by that.

Further, in the method of manufacturing the protector, the second mold is a insert piece mold configured to be detachable from the first mold.

In order to achieve the above object, the protector according to the present invention accommodates the wiring material, and the accommodation space portion in which the wiring material slides in the sliding direction and the inner peripheral surface forming the accommodation space portion. The accommodating member includes, and the accommodating member is divided into a first region and a second region with a boundary portion in the extending direction of the accommodating member, and the first region is formed on the inner peripheral surface. A concave portion is formed so as to straddle the second region, the boundary portion is formed at the bottom portion of the concave portion, and the depth of the concave portion is formed to be longer than the protrusion amount of the boundary portion. It is characterized by that.

In order to achieve the above object, the wire harness according to the present invention includes the protector according to claim 3 and a wiring material accommodated in the protector, and the wiring material has an outer peripheral surface extended. It is characterized in that it is formed in an uneven shape alternately in the existing direction.

In the protector and the method for manufacturing the protector according to the present invention, and the wire harness, a concave portion is molded over the first region and the second region on the inner peripheral surface of the accommodating member, and the depth of the concave portion is the first region. It is molded so as to be longer than the height of the boundary portion protruding outward from the boundary between the and the second region. As a result, it is possible to prevent the wiring material sliding inside the protector from coming into contact with the burrs generated on the inner peripheral surface of the protector to generate an abnormal noise.

FIG. 1 is a plan view showing a schematic configuration of a wire harness including a protector in the embodiment. FIG. 2 is an exploded perspective view showing a schematic configuration of the L-side protector according to the embodiment. FIG. 3 is an exploded perspective view showing a schematic configuration of the R-side protector in the embodiment. FIG. 4 is a perspective view showing a schematic configuration of an upper case in the L-side protector. FIG. 5 is a perspective view showing a schematic configuration of an upper case in the R side protector. FIG. 6 is a perspective view showing a schematic configuration of a main part of the upper case. FIG. 7 is a schematic view showing a contact state between the inner peripheral surface of the upper case and the outer peripheral surface of the corrugated tube. FIG. 8 is a plan view showing a schematic configuration of a mold for molding the L-side protector. FIG. 9 is a plan view showing a schematic configuration of a mold for molding the R-side protector. FIG. 10A is a cross-sectional view showing a schematic configuration of the ends of the first mold and the second mold separated from each other, and FIG. 10B is formed by the first mold and the second mold. It is sectional drawing which shows the schematic structure of the convex part. FIG. 11 is a schematic diagram for explaining a combination pattern of two types of first molds and two types of second molds.

Hereinafter, the protector according to the present invention, the method for manufacturing the protector, and the embodiment of the wire harness will be described in detail with reference to the drawings. The present invention is not limited to the embodiments shown below. In addition, the components in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same.

[Embodiment]
FIG. 1 is a plan view showing a schematic configuration of a wire harness including a protector in the embodiment. FIG. 2 is an exploded perspective view showing a schematic configuration of the L-side protector according to the embodiment. FIG. 3 is an exploded perspective view showing a schematic configuration of the R-side protector in the embodiment. FIG. 4 is a perspective view showing a schematic configuration of an upper case in the L-side protector. FIG. 5 is a perspective view showing a schematic configuration of an upper case in the R side protector. FIG. 6 is a perspective view showing a schematic configuration of a main part of the upper case. FIG. 7 is a schematic view showing a contact state between the inner peripheral surface of the upper case and the outer peripheral surface of the corrugated tube. FIG. 8 is a plan view showing a schematic configuration of a mold for molding the L-side protector. FIG. 9 is a plan view showing a schematic configuration of a mold for molding the R-side protector. FIG. 10 (A) is a cross-sectional view showing a schematic configuration of the ends of the first mold and the second mold separated from each other, and FIG. 10 (B) is formed by the first mold and the second mold. It is sectional drawing which shows the schematic structure of the convex part. FIG. 11 is a schematic diagram for explaining a combination pattern of two types of first molds and two types of second molds. The protector shown in FIG. 1 shows a state of being mounted on a vehicle (not shown). In FIG. 3, the wiring material housed inside the protector is omitted. FIG. 10A shows an end portion of the first mold facing the second mold and an end portion of the second mold facing the first mold. FIG. 10B shows a convex portion formed by a first convex portion and a second convex portion in two molds.

In the present embodiment, the illustrated X direction is the extending direction of the protector. The Y direction is the width direction of the protector and is orthogonal to the extending direction. The Z direction is the vertical direction of the protector, and is a direction orthogonal to the extending direction and the width direction. The Z direction is along the vertical direction, for example, with the protector mounted on the vehicle.

As shown in FIG. 1, the protector 1 in the present embodiment is arranged on the floor of a vehicle (not shown), for example, and accommodates the wiring material W inside. The protector 1 is connected to a seat rail 2 arranged on the floor of the vehicle.

The seat rail 2 is a guide rail for guiding the slide movement along the slide direction (X direction in the illustrated example) of the slide seat 3. The seat rail 2 is connected to both ends of the protector 1 in the extending direction, which are formed so as to be folded back from one side to the other, and is arranged close to the protector 1 and along the extending direction. The seat rails 2 are provided in pairs at intervals along the width direction. In the illustrated example, only one of the pair of seat rails 2 is described, and the other seat rail 2 is omitted.

The slide seat 3 is for a vehicle occupant (not shown) to be seated, and is installed so as to be slidable along the sliding direction with respect to the floor of the vehicle. The slide sheet 3 is supported by a pair of seat rails 2.

The wiring material W is an electric wire for supplying electric power to an electrical component (not shown) provided on the slide sheet 3. A part of the wiring material W is housed in the protector 1. Both ends of the wiring material W are led out to the outside through the openings 14a and 14b of the protector 1. One end of the wiring material W is electrically connected to the electrical components of the slide sheet 3 through the seat rail 2 through the opening 14a, and the other end is externally connected through the opening 14b. It is electrically connected to a power source, etc. The wiring material W is housed inside the protector 1 by folding back in a U shape from one side in the extending direction to the other side. The portion of the wiring material W that is led out from the opening 14a changes as the slide sheet 3 slides. For example, when the slide sheet 3 moves in the sliding direction away from the opening 14a, a part of the wiring material W is pulled out from the opening 14a. At this time, one end of the wiring material W is pulled out from the opening 14a, so that the state of the portion housed in the protector 1 changes from the V state to the U state. On the other hand, when the slide sheet 3 moves in the sliding direction toward the opening 14a, a part of the wiring material W is pushed back inward from the opening 14a. At this time, one end of the wiring material W is pushed back inward from the opening 14a, so that the state of the portion housed in the protector 1 changes from the V state to the W state. In this way, the wiring material W slides inside the protector 1 along the extending direction as the slide sheet 3 slides. That is, in the present embodiment, the extending direction of the wiring material W is the sliding direction.

In the wiring material W of the present embodiment, the outer peripheral surfaces are alternately formed in an uneven shape in the extending direction. For example, the wiring material W is covered with a corrugated tube Ct, which is an exterior member for protecting the electric wire, at least for a portion accommodated in the protector 1. In the present embodiment, the wire harness WH is composed of the protector 1 and the wiring material W housed in the protector 1. As shown in FIGS. 2 and 3, the protector 1 includes a protector 1R for R and a protector 1L for L. The protector 1R is arranged on the R side of the vehicle body, for example, and the protector 1L is arranged on the L side of the vehicle body.

The protectors 1R and 1L are made of, for example, a synthetic resin or the like. Each of the protectors 1R and 1L includes a storage space portion 10 and a storage member 13. The accommodating space portion 10 is a space in which the wiring material W is accommodated and the wiring material W slides in the sliding direction. The accommodation space portion 10 communicates with the outside through the openings 14a and 14b. The accommodating member 13 has an inner peripheral surface 13a forming the accommodating space portion 10. As shown in FIG. 2, the accommodating member 13 includes an upper case 11L and a lower case 12L in the protector 1L. In the protector 1L, the accommodation space portion 10 is formed by an inner surface of the upper case 11L and an inner surface of the lower case 12L. The accommodating member 13 is composed of an upper case 11R and a lower case 12R in the protector 1R, as shown in FIG. In the protector 1R, the accommodation space portion 10 is formed by an inner peripheral surface of the upper case 11R and an inner peripheral surface of the lower case 12R. The upper cases 11L and 11R are locked to the lower cases 12L and 12R by a locking structure.

As shown in FIGS. 4 and 5, the upper cases 11L and 11R of the present embodiment are formed in the first region 15 and the second region 16 with the boundary portion 19 interposed therebetween in the extending direction of the accommodating member 13, respectively. It is partitioned. The boundary portion 19 is a so-called parting line generated when the upper cases 11L and 11R are molded by combining two molds described later. The boundary portion 19 of the present embodiment includes a boundary between the first region 15 and the second region 16, and includes burrs generated on the parting line.

In the upper case 11L, a concave portion 17 is formed on the inner peripheral surface 13a so as to straddle the first region 15 and the second region 16L (FIGS. 6 and 7). The concave portion 17 is also formed on the inner peripheral surface 13a of the upper case 11R so as to straddle the first region 15 and the second region 16L (FIG. 5). The concave portion 17 is formed so as to extend in a direction orthogonal to the extending direction of the protector 1, that is, in the width direction. The concave portion 17 is formed on the inner side surface of the upper cases 11L and 11R along the width direction. That is, the concave portion 17 is formed along the parting line on the inner side surface of the upper cases 11L and 11R.

The depth from the opening to the bottom 17a, that is, the depth D of the concave portion 17, is formed so as to be longer than the protrusion amount T of the boundary portion 19 (FIG. 7). The depth D of the concave portion 17 is preferably a length that does not come into contact with the wiring material W that slides in the accommodation space portion 10 in consideration of manufacturing variations in the protrusion amount T of the boundary portion 19 in each of the upper cases 11L and 11R. .. The opening width L1 of the concave portion 17 is preferably a width that does not cause abnormal noise in contact with the wiring material W sliding on the accommodation space portion 10. The width L2 of the bottom portion 17a is preferably shorter than the opening width L1 and is a width in consideration of the width of the boundary portion 19 in the sliding direction. The concave portion 17 is formed with a corner portion 18 continuous with the contact surface in contact with the wiring material W on the inner peripheral surface 13a of each of the upper cases 11L and 11R and facing in the sliding direction. A corner R is set at each corner portion 18.

Next, a method of manufacturing the upper cases 11L and 11R will be described with reference to FIGS. 8 to 11. The upper cases 11L and 11R are manufactured by molding, for example, injection molding. The upper cases 11L and 11R are molded using the molds 20L and 20R shown in FIGS. 8 and 9. The upper case 11L is manufactured by filling a space formed between the mold 20L and a mold (not shown) with a synthetic resin material and separating the upper case 20L from the mold 20L and the mold (not shown). The upper case 11R is manufactured by filling a space formed between the mold 20R and a mold (not shown) with a synthetic resin material and separating the upper case 11R from the mold 20R and the mold (not shown). Here, the mold 20L is composed of a first mold 21 and a second mold 22L. The mold 20R is composed of a first mold 21 and a second mold 22R. The first mold 21 is common to the mold 20L and the mold 20R. The second molds 22L and 22R are insert piece molds that are detachably configured with respect to the first mold 21, and both are common parts for the first mold 21. The first mold 21 molds the first region 15 in each of the upper cases 11L and 11R. The second molds 22L and 22R mold the second regions 16L and 16R in the upper cases 11L and 11R. In this way, two types of upper cases 11L and 11R can be molded by using the two types of second molds 22L and 22R interchangeably with respect to the common first mold 21. By combining the first mold 21 and the second mold 22L, the first region 15 and the second region 16L of the upper case 11L can be integrally and simultaneously molded. Further, the first mold 21 and the second mold 22R can be combined to integrally and simultaneously mold the first region 15 and the second region 16R of the upper case 11R.

As shown in FIG. 10A, the first mold 21 has a first convex portion 31 projecting from an end facing the second molds 22L and 22R in a direction orthogonal to the extending direction. The first convex portion 31 is formed so as to extend in a direction orthogonal to the extending direction. The second molds 22L and 22R each have a second convex portion that is adjacent to the first convex portion 31 in the extending direction and protrudes from an end facing the first mold in a direction orthogonal to the extending direction. Have. The first convex portion 31 and the second convex portion 32 are formed so as to project along a projecting direction orthogonal to the facing direction in which the first mold 21 and the second molds 22L and 22R face each other.

As shown in FIG. 10B, the first convex portion 31 and the second convex portion 32 have one convex portion 30 by combining the first mold 21 and the second mold 22L or the second mold 22R. It becomes. The convex portion 30 is formed with a draft. The draft is taken into consideration for the releasability of the upper cases 11L and 11R with respect to the first mold 21 and the second molds 22L and 22R, and is 0.5 to 0.5 to the drafting direction and the protruding direction in this embodiment. It is about several degrees. In the molding step, the convex portion 30 forms a concave portion 17 extending in a direction intersecting the sliding direction with respect to the inner peripheral surface 13a. Therefore, the surfaces of the bottom portion 17a and the inner portion 17b of the concave portion 17 are the protruding surface 30a and the outer surface of the convex portion 30 of the first mold 21 and the second mold 22L, 22R for molding the upper cases 11L and 11R. The side surface 30b is transcribed. Further, the corner portion 18 of the concave portion 17 is molded by the root portion 30c of the convex portion 30 having the corresponding corner R so that a predetermined corner R is formed.

As described above, the protector 1 in the present embodiment accommodates the wiring material W, and the accommodation space portion 10 in which the wiring material W slides in the sliding direction and the inner peripheral surface forming the accommodation space portion 10 are formed. A housing member 13 having 13a is provided. The accommodating member 13 is divided into a first region 15 and a second region 16 with a boundary portion 19 interposed therebetween in the extending direction of the accommodating member 13, and the first region 15 and the second region 16 are formed on the inner peripheral surface 13a. The concave portion 17 is formed over the above. The boundary portion 19 is formed on the bottom portion 17a of the concave portion 17. The depth D of the concave portion 17 is formed so as to be longer than the protrusion amount of the boundary portion 19.

According to the above configuration, in the protector 1 of the present embodiment, the concave portion 17 is formed on the inner peripheral surface 13a of the accommodating member 13 so as to straddle the first region 15 and the second region 16, and the depth D of the concave portion 17 is set. The amount of protrusion of the boundary portion 19 protruding outward from the boundary between the first region 15 and the second region 16 is set to be longer. As a result, the wiring material W sliding on the accommodation space portion 10 does not come into contact with the boundary portion 19 generated on the inner peripheral surface 13a. Therefore, for example, in a state where the wiring material W and the boundary portion 19 intersect. It is possible to suppress the generation of abnormal noise caused by sliding. As a result, it is possible to prevent the generation of abnormal noise due to the slide movement of the slide sheet 3.

Further, in the protector 1 in the present embodiment, the second region 16 is molded by at least two second molds 22L and 22R. As a result, the protector 1 having different formations can be molded by exchanging the second mold 22L and the second mold 22R, and the mold cost can be reduced.

Further, in the method of manufacturing the protector 1 in the present embodiment, of the molds 20L and 20R for molding the accommodating member 13, the first mold 21 forms the first region 15 of the accommodating member 13, and the second mold 22L. , 22R comprises a molding step of forming the second regions 16L, 16R in the accommodating member 13. The first mold 21 has a first convex portion 31 projecting from an end facing the second molds 22L and 22R in a direction orthogonal to the extending direction of the accommodating member 13. The second molds 22L and 22R have a second convex portion 32 that is adjacent to the first convex portion 31 in the extending direction and projects from an end facing the first mold 21 in a direction orthogonal to the extending direction. Have. In the molding step, the first convex portion 31 and the second convex portion 32 form a concave portion 17 extending in a direction intersecting the sliding direction with respect to the inner peripheral surface 13a. The depth D of the concave portion 17 is longer than the protrusion amount of the boundary portion 19 between the first region 15 and the second regions 16L and 16R formed by the boundary 33 between the first convex portion 31 and the second convex portion 32. Is formed as follows.

In the method for manufacturing the protector 1 of the present embodiment, the first mold 21 has a first convex portion 31, each of the second molds 22L and 22R has a second convex portion 32, and the first convex portion 31 and The second convex portion 32 forms a concave portion 17 extending in a direction intersecting the sliding direction with respect to the inner peripheral surface 13a. As a result, the protector 1 having the above configuration can be manufactured, and the generation of abnormal noise due to the slide movement of the slide sheet 3 can be prevented. Conventionally, the mold cost has been reduced by sharing the first mold 21. However, by using two types of molds (first mold and second mold), the boundary is formed on the inner peripheral surface. Even if the portion 19 is generated, it is possible to prevent the generation of abnormal noise without bringing the wiring material W sliding on the inner peripheral surface 13a into contact with the boundary portion 19.

Further, in the method of manufacturing the protector 1 in the above embodiment, the second molds 22L and 22R are insert piece molds configured to be detachable from the first mold 21. As a result, the second mold 22L and the second mold 22R can be easily replaced with respect to the first mold 21, and the manufacturing efficiency of the protector 1 can be improved.

Further, the wire harness WH in the above embodiment includes a protector 1 and a wiring material W housed in the protector 1. The outer peripheral surface of the wiring material W is formed in an uneven shape alternately in the extending direction. As a result, similarly to the effect obtained by the protector 1 having the above configuration, the outer peripheral surface formed in the uneven shape of the wiring material W sliding on the accommodation space portion 10 is formed on the inner peripheral surface 13a with the boundary portion 19. Since there is no contact, for example, it is possible to suppress the generation of abnormal noise caused by sliding the corrugated tube Ct and the boundary portion 19 in an intersecting state. As a result, it is possible to prevent the generation of abnormal noise due to the slide movement of the slide sheet 3.

In the above embodiment, the case where the first mold 21 is of one type has been described, but the present invention is not limited to this, and the first mold 21 may be of a plurality of types. For example, as shown in FIG. 11, the first mold 21A and the first mold 21B each mold protectors 1 having different lengths in the extending direction. In this case, it is possible to mold the protector 1 by exchanging the two types of the second molds 22L and 22R with respect to the shared first molds 21A and 21B. As a result, even if the number of members to be molded increases, the mold cost can be reduced by creating a common mold.

1,1L, 1R protector 2 Seat rail 3 Slide seat 10 Storage space 11L, 11R Upper case 12L, 12R Lower case 13 Storage member 13a Inner peripheral surface 14a, 14b Opening 15 First area 16, 16L, 16R Second area 17 Concave part 17a Bottom part 17b Inner part 18 Square part 19 Boundary part 20L, 20R Mold 21 1st mold 22L, 22R 2nd mold 30 Convex part 30a Protruding surface 30b Outer side surface 30c Root part 31 1st convex part 32 2nd Convex 33 Boundary Ct Corrugated Tube W Wiring Material WH Wire Harness

Claims (4)

A method for manufacturing a protector including a storage space portion that accommodates a wiring material and the wiring material slides in a sliding direction, and an accommodation member having an inner peripheral surface that forms the accommodation space portion.
Among the molds for molding the accommodating member, a molding step of molding the first region of the accommodating member with the first mold and molding the second region of the accommodating member with the second mold is provided.
The first mold is
It has a first convex portion that protrudes from an end facing the second mold in a direction orthogonal to the extending direction of the accommodating member.
The second mold is
In the extending direction, it has a second convex portion that is adjacent to the first convex portion and projects in a direction orthogonal to the extending direction from an end portion that faces the first mold.
In the molding process,
The first convex portion and the second convex portion form a concave portion extending in a direction intersecting the sliding direction with respect to the inner peripheral surface.
The depth of the concave portion is
Manufacture of a protector characterized in that it is molded so as to be longer than the protrusion amount of the boundary portion between the first region and the second region, which is molded by the boundary between the first convex portion and the second convex portion. Method. The second mold is
The method for manufacturing a protector according to claim 1, which is a insert piece mold that is detachably configured with respect to the first mold. A storage space that accommodates the wiring material and slides the wiring material in the sliding direction,
An accommodating member having an inner peripheral surface forming the accommodating space,
With
The accommodating member
In the extending direction of the accommodating member, it is divided into a first region and a second region with a boundary portion interposed therebetween.
On the inner peripheral surface, a concave portion is formed straddling the first region and the second region.
The boundary portion is formed at the bottom of the concave portion.
The depth of the concave portion is
A protector characterized in that it is formed so as to be longer than the protrusion amount of the boundary portion. The protector according to claim 3 and
The wiring material housed in the protector and
With
The wiring material is
A wire harness characterized in that the outer peripheral surfaces are alternately formed in an uneven shape in the extending direction.

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