JP7382870B2 - Wire harness branch protection structure, protective sheet, and branch protection method - Google Patents

Description

The present invention relates to a protection structure for protecting a branch part of a wire harness mounted on a vehicle.

As a structure for protecting a branch part of a wire harness, a protective sheet as disclosed in Patent Document 1 below is fixed to the branch part.

The protective sheet is configured according to the form of the branch to which it is applied, and the protective sheet of Patent Document 1 is used for a T-shaped branch. This protective sheet is constructed by forming a plurality of types of slits in a square or rectangular sheet body. The slits are a pair of left and right horizontal slits and a vertical slit in a direction perpendicular to these. The horizontal slit is formed at a position where the seat main body is separated into upper and lower flap parts, leaving the center part intact. The vertical slit is formed at the center of the side extending in the left-right direction of one flap part, and the distance between the pair of vertical slits is equal to or less than the width of the branch line.

In a protective sheet having such a shape, one flap having a vertical slit covers the linear portion of the branch, and the other flap covers the branch line.

Conventional protective sheets have been formed into a special shape that matches the shape of the branch to which they are fixed, as described using Patent Document 1 as an example.

Japanese Patent Application Publication No. 2011-199992

However, the form of the branching part, that is, the number and direction of branching lines, is diverse. The thickness of the wire harness (main line, branch line) at the branch part also varies.
For this reason, multiple types of protection sheets were required to protect the branch portions of the wire harness.

In order to enable one protective sheet to be applied to various types of branch portions, it is conceivable to configure the protective sheet with a rectangular sheet that does not have a uniquely shaped slit as in Patent Document 1.

However, with a protective sheet having such a configuration, it is necessary to perform a shaping operation such as folding the excess portion that appears at the corner when covering the branch portion. Furthermore, it is necessary to wrap adhesive tape around it to maintain its shape. This not only results in poor workability but also increases the size of the protective structure at the branch. If the branch part is large, it will adversely affect the installation of the wire harness.

Therefore, the main object of the present invention is to provide a compact form of protection for various types of branch portions while using a protection sheet with a simple structure.

The means for this purpose is a wire harness branch protection structure in which the branch parts of the wire harness are covered with a protective sheet, and the protective sheet is composed of one sheet material, and each of the main body sheet parts has one main body sheet part. and a winding part, the main body sheet part covers a continuous side surface of the branch part, and the winding part has a shape obtained by cutting a linear slit in a plane, A plurality of belt parts are provided on a side of the main body sheet part where the branch wires are present, different from the part having the continuous side surface, and the belt parts are arranged above the wire harness and the main body sheet part. is wound around the wire harness and fixed by an adhesive provided at the tip of the belt, and some of the belts out of the plurality of belts are not wound around the wire harness and are fixed to the main body without being wound around the wire harness. This is a structure for protecting the branch part of the wire harness folded over the sheet part .

In this configuration, the main body sheet portion covers the continuous side surface of the branch portion of the wire harness, and the plurality of band portions of the winding portion are wrapped around each branch wire according to the form of the branch wire. The band portion fixes the main body sheet portion to the wire harness while covering any portion not covered by the main body sheet portion. Since the band has a shape obtained by cutting a linear slit in a plane, it has a high degree of freedom in deformation, and can be deformed in various ways depending on the position where it is wound, regardless of the form of the branch part. can be protected.

In addition, since the band is fixed by an adhesive provided at the tip of the band, the band, which has a shape obtained by cutting a linear slit in a plane, can vary depending on the position where it is wound. In addition to being able to vary the shape, it is fixed with an adhesive provided at the tip of the band, so it is possible to wind it in a variety of ways depending on the shape of the branch.

Further, some of the plurality of band portions are not wound around the wire harness but are folded in the direction of the main body sheet portion. By folding the band portion toward the main body sheet portion in this manner , the shape of the wrapping portion is deformed into a shape suitable for wrapping and desired protection. By this deformation, it is possible to avoid the band from being toyed with, and it is also possible to realize compact and stylish winding.

An aspect of the present invention may be a wire harness branch protection structure in which the boundary between the main body sheet portion and the winding portion is in contact with the base of a branch wire other than the portion having the continuous side surface. .

In this configuration, the base of the wrapping part is positioned at the base of the branch line, so in combination with the method of wrapping and fixing multiple belt parts, it is possible to securely fix the part without shifting due to vibration etc. be.

Another means for solving the problem is a wire harness branch protection sheet that covers the wire harness branch, and is composed of one sheet material, and is wrapped around one main body sheet. The body sheet portion is large enough to cover a continuous side surface of the branch portion, and the winding portion has a shape obtained by cutting a linear slit in a plane. , the wire harness branch part used in the wire harness branch part protection structure has a plurality of belt parts extending from the main body sheet part, and an adhesive layer is provided on at least the tip part on one side of the belt part. It is a protective sheet.

In this configuration, the main body sheet portion that covers the continuous side surface of the branch portion of the wire harness is fixed to the branch portion by wrapping with the plurality of band portions of the wrapping portion. The plurality of belt parts are wound around each branch line according to the form of the branch line, and if there is a part that is not covered with the main body sheet part, it is covered with the belt part. The shape of the band is obtained by making a linear slit in a plane, so it has a high degree of freedom in deformation and can be transformed into various forms depending on the position where it is wound. It can be applied to the bifurcation of the shape.
Further, a protective sheet consisting of only a main sheet portion and a wrapping portion has a simple structure.

Furthermore, since an adhesive layer is provided at the tip of one side of the band, it is possible to wrap the band, adjust the wrapping position, and then fix it using the adhesive layer at the tip. , good workability.

As an aspect of the present invention, the boundary between the main body sheet part and the winding part is linear, and the band part of the winding part is one strip extending from the side of the winding part opposite to the main body sheet part. It may also be used as a protective sheet for a wire harness branch formed by the above slits.

In this configuration, the linear boundary separating the main sheet portion and the wrapping portion simplifies the structure of the protective sheet. In addition, although the shape of the protective sheet can be set as appropriate, since the band portion is formed by one or more slits extending from one or more sides opposite to the main sheet portion in the wrapping portion, from this point of view The structure of the protective sheet is also simple.

As an aspect of the present invention, the protective sheet is formed into a quadrilateral shape, and the boundary between the main body sheet portion and the wrapping portion is parallel to any side forming the quadrilateral. good.

In this configuration, since the protective sheet has a shape such as a rectangle, square, trapezoid, parallelogram, or rhombus, the overall shape is simple, easy to manufacture, and has a good yield.

As an aspect of the present invention, the protective sheet is rectangular or square, and the boundary between the main body sheet part and the wrapping part is parallel to any one of four sides, and the band part of the wrapping part However, the protection sheet for the wire harness branch portion may be formed by one or more slits extending from the side opposite to the main body sheet portion of the wrapping portion.
In this configuration, the protective sheet has a simpler shape, and in combination with the straight boundaries and slits, a simpler structure can be achieved.

As an aspect of the present invention, a protective sheet for a wire harness branch portion may be provided in which a plurality of the slits are provided and the intervals and lengths of the slits are all constant.
In this configuration, since the thickness and length of the band portions located at least on the intermediate side are the same, uniform handling can be achieved.

Another means for solving the problem is a wire harness branch protection method in which the branch parts of the wire harness are covered with a protective sheet. The body sheet part is divided into two regions, a part and a wrapping part, and the main sheet part has a size that covers a continuous side surface of the branch part, and the wrapping part has a shape obtained by making a linear slit in a plane. A protective sheet having a plurality of belt parts extending from the main body sheet part and having an adhesive layer provided at least at the tip on one side of the belt part is used, and the belt part is attached to the main body sheet part. In a state in which the main body sheet part is extended to the side where a branch line other than the part having the continuous side surface exists, the main body sheet part is placed along the continuous side surface of the wire harness, and the branch wire is connected to the branch line at the main body sheet part. After covering the side surfaces of the wire harness, the band portion is wound and fixed over the wire harness and the main body sheet portion, and in the first stage of covering the side surface of the wire harness with the main body sheet portion, one of the band portions is fixed. This is a method for protecting a branch part of a wire harness by folding a part of the band part in the direction of the main body sheet part .

In this configuration, a protective sheet is divided into two parts, the main sheet part and the wrapping part, and the main sheet part is applied to the side of the branch part to cover it, and then the band part of the wrapping part is attached according to the form of the branch line. Wrap and secure. Therefore, although the fixing work for protection is divided into two stages, the workability is good because the wrapping part is composed of a plurality of band parts and the wrapping part has a high degree of freedom of deformation. Furthermore, appropriate covering and fixing can be achieved regardless of the form of the branch.

Moreover, in the first stage of covering the side surface of the wire harness with the main body sheet part, some of the band parts are folded over in the direction of the main body sheet part. In this way, before covering the side surface of the branch part with the main body sheet part, some of the band parts are folded toward the main body sheet part, so that the shape of the wrapping part can be adjusted to suit the wrapping and desired protection. Can be deformed. Through this deformation, it is possible to realize compact and stylish winding while eliminating the occurrence of obstructive bands.

According to this invention, the protective sheet has a simple structure in which a linear slit is formed in the wrapping portion which is divided into two parts, the main sheet portion and the wrapping portion. By changing the handling of the band portion of the wrapping portion, various forms of branch portions can be covered in a compact shape without enlarging the branch portion.

FIG. 3 is a perspective view showing a protective sheet and a branch protection structure. A perspective view of a protective sheet. An explanatory diagram showing a branch protection method. An explanatory diagram showing a branch protection method. An explanatory diagram showing a branch protection method. An explanatory diagram showing a branch protection method. An explanatory diagram showing a branch protection method. FIG. 7 is a plan view of a protective sheet according to another example. FIG. 7 is a plan view of a protective sheet according to another example. FIG. 7 is a plan view of a protective sheet according to another example. FIG. 7 is a plan view of a protective sheet according to another example. FIG. 7 is a plan view of a protective sheet according to another example. FIG. 7 is a plan view of a protective sheet according to another example.

One embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a wire harness branch protection sheet 31 that covers the branch 12 of the wire harness 11 to protect the branch 12 from external force, vibration, etc., and a branch protection structure 11a using this protection sheet 31. shows. As shown in this figure, the protective sheet 31 of the present invention can be used for a plurality of types of branch portions 12 having different shapes.

The branch portion 12 of the wire harness 11 is configured by branching one or more branch lines 22 from the main line 21 or by branching the main line 21 into two or more branch lines 22. The thickness of the main line 21 and the branch lines 22 varies depending on the position of the branch part 12, and the number and direction of the branch lines 22 also vary.

The branch part 12 shown in FIG. 1(a) is a T-shaped branch part 12. This branch part 12 has a shape having one branch line 22 extending from the main line 21 in a direction perpendicular to the longitudinal direction thereof, or a branch line 22a extending in the same direction as this main line 21 at the end of the main line 21, and a branch line 22a extending in the same direction as the main line 21, and It has a shape with one branch line 22b extending in orthogonal directions. The branch 12 shown in FIG. 1(b) has more branch lines 22 than the T-shaped branch 12. This branch part 12 has a shape having three branch lines 22e, 22f, and 22g extending from the main line 21 in a direction crossing the longitudinal direction thereof, or one branch line extending in the same direction as the main line 21 at the end of the main line 21. It has a shape including a branch line 22a and three branch lines 22b, 22c, and 22d extending in a direction intersecting the main line 21.

As shown in FIG. 2, the protective sheet 31 is composed of one sheet material. The sheet material is preferably made of a bendable material and can be appropriately cut with scissors, a cutter, or the like as necessary. More preferably, the protective sheet 31 is made of a synthetic resin sheet, a synthetic rubber sheet, a natural rubber sheet, or the like. In addition, fiber cloth or nonwoven fabric such as aramid cloth may be used depending on the usage environment and required performance. For the purpose of exhibiting a shielding effect, a conductive material such as carbon cloth may be used. It is also possible to use a composite material such as a waterproof cloth made by laminating a synthetic resin, rubber, etc. on a textile fabric such as a woven fabric or a non-woven fabric.

To explain the structure of the protective sheet 31, the protective sheet 31 is divided into two areas, one main sheet part 32 and one wrapping part 33. That is, the protective sheet 31 has only the main body sheet part 32 and the wrapping part 33.

The main body sheet portion 32 has a size that covers the continuous side surface 12a (see FIG. 1) of the branch portion 12, and the wrapping portion 33 has a plurality of band portions 34. The band portion 34 has a shape obtained by making a linear slit 35 in a plane, and the band portion 34 extends from the main body sheet portion 32.

The above-mentioned "connected side surface 12a of the branch 12" refers to a portion of the main line 21 that extends in the longitudinal direction of the main line 21 around the branch 12, or one branch line that is continuous from the main line 21 of the branch 12. This is the part that extends to 22a.

The plan view shapes of the protective sheet 31, the main body sheet portion 32, and the wrapping portion 33 may be set as appropriate. 1 and 2 show an example in which the protective sheet 31 is quadrilateral, more specifically rectangular. The boundary between the main body sheet part 32 and the wrapping part 33 (see imaginary line B in FIG. 2) is linear, and the boundary B is parallel to any side of the quadrilateral/rectangular outline of the protective sheet 31. It is.

A boundary B between the main body sheet portion 32 and the wrapping portion 33 is parallel to the short side of the rectangular protective sheet 31. The position of the boundary B in the protective sheet 31, that is, the position on the long side constituting the outline of the protective sheet 31, can be set as appropriate, but it is preferably in the middle in the longitudinal direction as shown in FIGS. 1 and 2.

The band portion 34 of the wrapping portion 33 is formed of one or more linear slits 35 extending from the side (one short side) of the wrapping portion 33 opposite to the main sheet portion 32 . The slits 35 are formed at three locations that equally divide the short side of the protective sheet 31 into four, and all have the same length. In other words, the intervals and lengths of the slits 35 are all constant, and the intervals between the long sides forming the outline of the protective sheet 31 and the slits 35 adjacent to these are the same as the intervals between the slits 35, and all the belt parts 34 is a constant width.

An adhesive layer 36 is formed on one side of the band 34, that is, on the tip of the inner surface that faces the wire harness 11 when in use. The range of the adhesive layer 36 may be the entire band portion 34, but it is sufficient if it is located closer to the tip than the middle in the longitudinal direction of the band portion 34, as shown in FIG. 2, for example.

The adhesive layer 36 may be one in which an adhesive is applied in advance and a release paper (not shown) is attached, or it may be applied during fixation. Note that in this specification, the term "adhesive" includes the concept of adhesive, and the material of the adhesive is preferably acrylic or rubber, and is determined depending on the material of the protective sheet 31. For example, when the protective sheet 31 is made of a material containing a plasticizer, such as a vinyl chloride sheet, the material of the adhesive is preferably a material that is resistant to the plasticizer. Further, when the protective sheet 31 is made of fiber cloth, nonwoven fabric, etc., it is preferable to use a material with high viscosity as the adhesive, from the viewpoint of preventing the adhesive from leaking through gaps in the fiber cloth, nonwoven fabric, etc.

The protective sheet 31 having such a configuration can be manufactured by cutting a sheet material at the outline position and the slit forming position.

Further, the branch protection structure 11a of the wire harness 11 covered with the protective sheet 31 having such a configuration is configured as follows. That is, first, the continuous side surface 12a of the branch portion 12 of the wire harness 11 is covered with the main body sheet portion 32 described above. Next, the tip of the band portion 34 of the wrapping portion 33 is directed toward the side where the branch lines 22b, 22c, 22d, 22e, 22f, and 22g, which are different from the portion having the continuous side surface 12a in the branch portion 12, exist. It is wound and fixed on the wire harness 11 and the main body sheet part 32.

In the branch protection structure 11a of the wire harness 11 shown in FIG. Further, the two band parts 34 constituting the wrapping part 33 are wound, and this state is fixed by the adhesive of the adhesive layer 36. As a result, the fixed state of the main body sheet portion 32 and the wrapping portion 33 to the T-shaped branch portion 12 is maintained. The same applies to the branch protection structure 11a of the wire harness 11 shown in FIG. 1(b). That is, the main body sheet portion 32 covers the continuous side surface 12a of the branch portion 12, and all the band portions 34 forming the wrapping portion 33 are wound, and this state is fixed by the adhesive of the adhesive layer 36. has been done. This maintains the fixed state of the main body sheet part 32 and the wrapping part 33 with respect to the branch part 12 having three or four branch lines 22a, 22b, 22c, 22d, 22e, 22f, and 22g.

A method for protecting a branch of the wire harness 11 to obtain such a branch protection structure 11a uses the above-mentioned protection sheet 31 and includes the following covering step and winding step. In the covering step, first, the band portion 34 is extended to the side where the branch lines 22b, 22c, 22d, 22e, 22f, and 22g are present, which is different from the portion of the main body sheet portion 32 having the continuous side surface 12a. Next, the main body sheet portion 32 is placed along the continuous side surface 12a of the wire harness 11, and the main body sheet portion 32 covers the side surface of the branch portion 12. In the subsequent winding step, the band portion 34 is wound and fixed onto the wire harness 11 and the main body sheet portion 32. The work is then completed in the winding process.
The method for protecting the branch portion of the wire harness 11 of this embodiment can be completed with a simple operation, leading to labor savings, and since there is no process such as heating, it is also effective in preventing quality deterioration of the wire harness 11.

A branch protection method and a branch protection structure 11a for four branch sections 12 having different shapes will be described with reference to FIGS. 3 to 7.
FIG. 3 shows an example of protecting a T-shaped branch 12 similar to that shown in FIG. 1(a).

First, as shown in FIG. 3(a), a protective sheet 31 is attached to the branch portion 12. At this time, the main body sheet portion 32 is placed against the continuous side surface 12a of the branch portion 12, and the band portion 34 is extended to the side where the branch lines 22, 22b are present, which is different from the portion having the continuous side surface 12a. The base of the band portion 34, that is, the boundary between the main body sheet portion 32 and the wrapping portion 33, and the end 35a of the middle slit 35 of the three slits 35 on the main body sheet portion 32 side are As shown in b), align with the bases of the other branch lines 22, 22b.

Next, the portion of the main body sheet portion 32 opposite to the wrapping portion 33 is folded back toward the other branch lines 22, 22b, and branches at the main body sheet portion 32 as shown in FIG. 3(c). A continuous side surface 12a of the portion 12 is covered. At this time, if there is any excess, fold the excess end inward. This completes the coating process.

After this, the middle position of the boundary between the main body sheet part 32 and the winding part 33 (the end 35a of the intermediate slit 35 on the main body sheet part 32 side) is applied to the base of the other branch wires 22, 22b and engaged. Stop. In this state, all four band parts 34 of the winding part 33 are appropriately wound mainly on the main body sheet part 32. The wound band portion 34 is fixed using the adhesive layer 36 at the tip (winding step; FIG. 3(d)). Of the four belt parts 34, the belt parts 34 at positions sandwiching the other branch lines 22, 22b are wound diagonally so as to intersect with each other.

FIG. 4 shows an example of protecting the T-shaped branch 12 similarly to FIG. 1(a).
First, as shown in FIG. 4(a), the protective sheet 31 is attached to the branch portion 12, but prior to this, a band folding step is performed. That is, in the first stage of covering the side surface of the wire harness 11 with the main body sheet part 32, some of the band parts 34a of the band parts 34 are folded over the inner surface of the main body sheet part 32.

The band portion 34a to be folded over is a band portion 34a located at a position corresponding to the other branch lines 22, 22b. The band portion 34a is folded over a width corresponding to or approximately corresponding to the thickness of the other branch lines 22, 22b. In the example shown in FIG. 4, only one of the two band portions 34 located in the middle, 34a, is folded. FIG. 1A shows an example in which two of the four band parts 34 located in the middle are folded.

After such pretreatment, the protective sheet 31 is attached to the branch portion 12. At this time, in the same way as described above, the main body sheet part 32 is placed against the continuous side surface 12a of the branch part 12, and the belt part is placed on the side where the branch lines 22, 22b, which are different from the part having the continuous side surface 12a, Extend 34. In addition, the base part 34b of the band part 34, which is the boundary between the main body sheet part 32 and the wrapping part 33 and which is folded in the band part folding process, is shown in FIG. 4(b). Align with the bases of the other branch lines 22, 22b as shown in FIG.

Next, the part of the main body sheet part 32 opposite to the winding part 33 is folded back toward the other branch lines 22, 22b, and branches at the main body sheet part 32 as shown in FIG. 4(c). A continuous side surface 12a of the portion 12 is covered. At this time, if there is any excess, fold the excess end inward. This completes the coating process.

After that, with the base portion 34b of the folded band portion 34a applied and locked to the base portions of the other branch lines 22, 22b, the other three band portions 34 of the wrapping portion 33 are mainly connected to the main body sheet. 32 as appropriate. The wound band portion 34 is fixed using the adhesive layer 36 at the tip (winding step; FIG. 4(d)).

Among the plurality of band parts 34, the band parts 34 at positions corresponding to the other branch lines 22, 22b are not wound around the wire harness 11 but are folded over the main body sheet part 32, so that the main body sheet part 32 and the wire harness It fits neatly between 11 and 11.

FIG. 5 shows an example of protecting the branch portion 12 in the same form as in FIG. 1(b).
First, as shown in FIG. 5(a), the protective sheet 31 is attached to the branch portion 12. At this time, the main body sheet part 32 is placed against the continuous side surface 12a of the branch part 12, and the side where the branch lines 22b, 22c, 22d, 22e, 22f, and 22g are present, which is different from the part having the continuous side surface 12a. Stretch out the band 34. The base of the band portion 34, that is, the boundary between the main body sheet portion 32 and the wrapping portion 33, and the end 35a of the middle slit 35 of the three slits 35 on the main body sheet portion 32 side are As shown in b), it is aligned with the base of the middle branch line 22b, 22e among the other branch lines 22b, 22c, 22d, 22e, 22f, 22g.

Next, the portion of the main body sheet portion 32 opposite to the wrapping portion 33 is folded back toward the other branch lines 22b, 22c, 22d, 22e, 22f, and 22g, as shown in FIG. 5(c). In this way, the main body sheet portion 32 covers the continuous side surface 12a of the branch portion 12. At this time, if there is any excess, fold the excess end inward. This completes the coating process.

Thereafter, the boundary between the main body sheet portion 32 and the wrapping portion 33 is placed against the bases of the other branch lines 22b, 22c, 22d, 22e, 22f, and 22g to be locked. Next, all four band parts 34 of the wrapping part 33 are passed between the branch wires 22b, 22c, 22d, 22e, 22f, and 22g, and between the branch wires 22c, 22d and the main wire 21, It is mainly wound around the main body sheet portion 32 as appropriate. The wound band portion 34 is fixed with the adhesive layer 36 at the tip of the band portion 34 (winding step; FIG. 5(d)).

FIG. 6 shows a branch 12 having branch lines 22h and 22i in two opposite directions from the main line 21, more specifically, a main line 21 and two branch lines 22h and 22i, or three branch lines 22a and 22h, 22i shows an example in which the cross-shaped branch 12 is protected. Since the branch portion 12 is cross-shaped, the other branch lines 22h and 22i extend in two opposite directions.

This protection method includes a band folding step as a pretreatment, similar to the example shown in FIG. In other words, some of the band parts 34 are folded over the main body sheet part 32 in the first stage of covering the side surface of the wire harness 11 with the main body sheet part 32 .

The band portion 34 to be folded over is a band portion 34 located at a position corresponding to the above-mentioned different branch lines 22h, 22i. The band portion 34 is folded over a width corresponding to or approximately corresponding to the thickness of the other branch lines 22h and 22i. In the example of FIG. 6, only one of the two belt parts 34 located in the middle, 34a, is folded.

After such pretreatment, the protective sheet 31 is attached to the branch portion 12. At this time, in the same way as described above, the main body sheet part 32 is placed against the continuous side surface 12a of the branch part 12, and the belt section is placed on the side where the branch lines 22h and 22i, which are different from the part having the continuous side surface 12a, are present. Extend 34. As described above, the cross-shaped branch 12 has two branch lines 22h, 22i as the other branch lines 22h, 22i, so the band 34 is extended on the side where one of the branch lines 22h exists.

In addition, the base part 34b of the band part 34a, which is the boundary between the main body sheet part 32 and the wrapping part 33 and which is folded in the band part folding process, is shown in FIG. 6(b). It is aligned with the base of the other branch line 22h selected as above. At this time, if there is any surplus in the main body sheet portion 32, the surplus end is folded inward. This completes the coating process.

After that, with the base 34b of the band 34a folded in the band folding process being applied to and locked against the base of the selected branch line 22h, the three winding parts 33 The band portion 34 is appropriately wound directly onto the wire harness 11 and onto the main body sheet portion 32. The wound band portion 34 is fixed using the adhesive layer 36 at the tip of the band portion 34 (winding step, (c) of FIG. 6). The selected band portions 34 of the three band portions 34 at positions sandwiching the another branch line 22h are wound diagonally so as to intersect with each other.

FIG. 7 shows an example of protecting a Y-shaped branch 12 which has the same form as the T-shaped branch 12 but differs in the direction of branching.
First, as shown in FIG. 7(a), the protective sheet 31 is attached to the branch portion 12. At this time, the main body sheet portion 32 is placed against the continuous curved side surface 12a of the branch portion 12, and the band portion 34 is placed on the side where the branch lines 22, 22b are present, which is different from the portion having the continuous side surface 12a. Stretch out. The base of the band portion 34, that is, the boundary between the main body sheet portion 32 and the wrapping portion 33, and the end portion 35a of the intermediate slit 35 of the three slits 35 on the main body sheet portion 32 side are As shown in b), align with the bases of the other branch lines 22, 22b.

Next, the portion of the main body sheet portion 32 opposite to the winding portion 33 is folded back toward the other branch lines 22, 22b, and branches at the main body sheet portion 32 as shown in FIG. 7(c). A continuous side surface 12a of the portion 12 is covered. At this time, if there is any excess, fold the excess end inward. This completes the coating process.

After that, with the middle position of the boundary between the main body sheet part 32 and the wrapping part 33 applied to the bases of the other branch lines 22, 22b and locked, all four band parts 34 of the wrapping part 33 are is appropriately wound mainly on the main body sheet portion 32. The wound band portion 34 is fixed using the adhesive layer 36 at the tip of the band portion 34 (winding step; FIG. 7(d)). Of the four band parts 34, the band parts 34 at positions sandwiching the above-mentioned different branch lines 22, 22b are preferably wound diagonally so as to intersect with each other.

In the branch protection structure 11a using the protective sheet 31 configured as described above, the configuration of the protective sheet 31 is divided into one main body sheet portion 32 and one wrapping portion 33, and the band portion of the wrapping portion 33 34 is formed by inserting a linear slit 35, so it is very simple. Therefore, manufacturing is easy and manufacturing costs can be reduced.

In particular, as described above, if the protective sheet 31 is made rectangular and the boundary between the main body sheet part 32 and the wrapping part 33 is parallel to either side, the structure is simple and the yield during manufacturing is also good. It has the advantage of

Furthermore, as illustrated in FIGS. 3 to 7, the protective sheet 31 can be used for various types of branch portions 12. That is, the winding part 33 fixes the main body sheet part 32 that covers the continuous side surface 12a of the branch part 12 and covers the branch part 12, but at this time, the shape obtained by making a linear slit 35 in the plane The band portion 34 has a high degree of freedom in deformation. Therefore, each of the plurality of band parts 34 can be deformed as appropriate, and can be freely wrapped in a manner suitable for obtaining a desired protection state. In other words, the winding portion 33 can be wound in various ways depending on the form of the branch portion 12, and therefore, as described above, protection can be achieved regardless of the form of the branch portion 12.
As a result, with one type of protection sheet 31, it is also possible to protect the branch portion 12 of one wire harness 11 that extends in various branches.

Furthermore, since there is a high degree of freedom in wrapping the band portions 34, it is possible to prevent the band portions 34 from overlapping each other excessively or from becoming bulky due to unintentional deformation of the band portions 34. The winding form can also be adjusted. Therefore, enlargement of the branch part 12 due to wrapping can be prevented, and the branch part 12 can be made compact and beautiful in appearance.

The ability to prevent the branch portion 12 from becoming enlarged in this way, coupled with the ability to obtain an appropriate form of protection depending on the form of the branch portion 12 as described above, allows for slim wiring of the wire harness 11, which is required to be shortened. also contributes greatly.

Furthermore, since the band portion 34 is fixed by the adhesive layer 36 provided at the tip, a separate member for fixing is not required. Furthermore, since the adhesive layer 36 is provided at least at the tip, the position at which the band portion 34 is wound can be adjusted. Therefore, the workability from winding to fixing is good, and it is easy to obtain a preferable winding state.

When wrapping the band portion 34, by folding an unnecessary part of the band portion 34a onto the main body sheet portion 32, the shape of the wrapping portion 33 can be immediately changed to a form suitable for wrapping and desired protection. This provides a better desired form of protection. Furthermore, the folded band portions 34a exist neatly between the main body sheet portion 32 and the branch portions 12, increasing the cushioning properties and preventing unnecessary bulk. Therefore, a compact protection form can be obtained as a whole.

Further, the boundary between the main body sheet portion 32 and the wrapping portion 33 abuts on the bases of the branch lines 22, 22b, 22c, 22d, 22e, 22f, 22g, 22h, 22i other than the portion having the continuous side surface 12a. Therefore, the main body seat portion 32 can be positioned. Therefore, in combination with the manner in which the plurality of band portions 34 are wound and fixed, a strong attachment state that does not shift due to vibrations or the like, that is, a protected state can be obtained.

Other examples of the protective sheet 31 will be described below. In this description, parts that are the same as those in the above-mentioned configuration are given the same reference numerals, and detailed description thereof will be omitted.
FIG. 8 is a plan view of a protective sheet 31 according to another example. The protective sheet 31 in FIG. 8 is an example in which the number and thickness (width dimension) of the band portions 34 are different from the protective sheet 31 illustrated in FIGS. 1 and 2. 8(a) has seven strips 34, which are thicker than the strips 34 in FIG. FIG. 8B has a narrower band portion 34 than the band portion 34 in FIG. 8A, and the number of band portions 34 is seven, the same as in FIG. 8A. In any of the protective sheets 31, all the band portions 34 have the same thickness.

In this way, when the protective sheet 31 having seven band parts 34 is used to protect the branch part 12 in the form shown in FIG. 1(b) and FIG. It is suitable for use by folding it over the main body sheet portion 32. That is, in addition to the three branch lines 22b, 22c, and 22d extending from the main line 21 in a direction intersecting the longitudinal direction thereof, or the one branch line 22a extending beyond the main line 21 in the same direction as the main line 21, It is used by folding the band portions 34 (the three band portions 34 sandwiched between the band portions) corresponding to the three branch lines 22e, 22f, and 22g extending in the intersecting direction onto the main body sheet portion 32. .
In addition, the protective sheet 31 shown in FIG. 8 can be used to protect the branch portion 12 having more than three or four branch lines.

FIG. 9 is a plan view of the protective sheet 31 having a trapezoidal outline. This protective sheet 31 is formed into an isosceles trapezoid, and has a main body sheet portion 32 formed on the short side of two mutually parallel sides, and a wrapping portion 33 formed on the long side. Three slits 35 are formed in the winding portion 33 from the long side toward the main body sheet portion 32. The spacing and length of the slits 35 are all the same. However, since the protective sheet 31 is trapezoidal, the thickness and shape of the band portions 34c at both ends are different from the thickness and shape of the two band portions 34d between them.
In the protective sheet 31 having such a configuration, the tip portions of the band portions 34c located at both ends, that is, the adhesive layer 36, are wide, which contributes to obtaining a strong fixation state.

FIG. 10 is a plan view of the protective sheet 31 showing an example in which the thicknesses of all the band portions 34 are not the same. In other words, even when forming slits 35 with the same spacing and length in the wrapping portion 33, by making the distance from both ends different from the spacing between the slits 35, the thickness of the band portion 34c located at both ends can be adjusted to the intermediate side. The thickness of the band portion 34d may be different from that of the band portion 34d.

FIG. 10A shows an example in which the thickness of the band portions 34c located at both ends is thicker than the thickness of the band portion 34d located at the middle side. FIG. 10(b) is an example in which the thickness of the band portions 34c located at both ends is thinner than the thickness of the band portion 34d located at the middle side.

FIG. 11 is a plan view of a protective sheet 31 showing another example of a slit structure. This protective sheet 31 has a round hole 37 at the end of the slit 35 on the main body sheet portion 32 side, that is, at a position corresponding to the base of the band portion 34 . The size of the hole 37 is set appropriately. The shape of the hole 37 may be other than circular.

In the protective sheet 31 having such a structure, the presence of the holes 37 allows the load to be dispersed and the tearing to be prevented even if the protective sheet 31 is pulled strongly during use. Further, when the band portion 34 is stretched diagonally in a crosswise manner, it is possible to suppress the occurrence of unevenness caused by deformation.

FIG. 12 is a plan view of the protective sheet 31 showing another example of the slit structure. This protective sheet 31 has perforations 35b at positions where slits 35 are formed. That is, the structure is such that it can be torn apart and used as necessary.
With the protective sheet 31 having such a configuration, it is possible to prevent the band portion from coming apart more than necessary, and when covering the branch portion 12, it is possible to select the most suitable protection for the form of the branch portion 12.

FIG. 13 is a plan view of a protective sheet 31 showing another example that can be used in pieces. This protective sheet 31 has perforations 38 for dividing on an extension line of some of the slits 35 in the main body sheet portion 32. The position and number of perforations 38 for dividing may be set as appropriate.

The protective sheet 31 having such a configuration can be separated at the perforations 38 and used so that the number of band parts 34 and the width of the protective sheet 31 are appropriate, if necessary. Therefore, the most suitable protection for the form of the branch portion 12 can be selected.

The above configuration is one form of configuration for implementing the present invention, and the present invention is not limited to only the above-described configuration, and other configurations may also be adopted.
For example, the contour shape of the protective sheet 31 may be other than the above-mentioned example, such as a square, semicircle, triangle, polygon, etc. in plan view.

Further, although it has been shown using FIG. 12 that the slits may be added later, the slits 35 may be made shorter than the length considered necessary, and perforations may be formed at the end of the slits 35. The structure for cutting or tearing may be a half cut or the like in addition to a perforation.
Regarding the manner in which the band portion 34 is folded, in the above-described example, the example is shown in which it is folded back against the main body sheet portion 32, but it may be folded only within the band portion 34.

DESCRIPTION OF SYMBOLS 11... Wire harness 11a... Branch part protection structure 12... Branch part 12a... Connected side surface 21... Trunk line 22... Branch line 31... Protective sheet 32... Main body sheet part 33... Winding part 34... Band part 35... Slit 36... Adhesive agent layer

Claims (8)

A wire harness branch protection structure that covers a wire harness branch with a protective sheet,
The protective sheet is composed of one sheet material and is divided into two areas, one main sheet part and one wrapping part,
The main body sheet portion covers a continuous side surface of the branch portion,
The wrapping portion has a shape obtained by cutting a linear slit in a plane, and a plurality of wires are provided on the side of the main body sheet portion where branch lines other than the portion having the continuous side surface exist. It has a belt part, and
The band portion is wound over the wire harness and the main body sheet portion and fixed by an adhesive provided at a tip of the band portion,
Some of the plurality of belt parts are folded over the main body sheet part without being wound around the wire harness.
Wire harness branch protection structure. A boundary between the main body sheet portion and the winding portion is in contact with a base of a branch line other than the portion having the continuous side surface.
The branch protection structure for a wire harness according to claim 1 . A wire harness branch protection sheet that covers a wire harness branch,
It is composed of one sheet material and is divided into two areas, one main sheet part and one wrapping part,
The main body sheet portion has a size that covers a continuous side surface of the branch portion,
The wrapping portion has a shape obtained by cutting a linear slit in a plane, and has a plurality of belt portions extending from the main sheet portion, and has an adhesive layer on at least a tip portion on one side of the belt portion. established,
A protective sheet for a wire harness branch used in the wire harness branch protection structure according to claim 1 or 2 . The boundary between the main body sheet portion and the wrapping portion is linear, and
The band portion of the wrapping portion is formed of one or more slits extending from a side of the wrapping portion opposite to the main sheet portion.
A protective sheet for a wire harness branch according to claim 3 . The protective sheet is formed into a quadrilateral shape,
The boundary between the main body sheet portion and the wrapping portion is parallel to any side forming a quadrilateral.
A protective sheet for a wire harness branch according to claim 3 . The protective sheet is rectangular or square, and
The boundary between the main body sheet part and the wrapping part is parallel to any one of the four sides,
The band portion of the wrapping portion is formed of one or more slits extending from a side of the wrapping portion opposite to the main sheet portion.
A protective sheet for a wire harness branch according to claim 3 . A plurality of the slits are provided,
The spacing and length of the slits are all constant.
A protective sheet for a wire harness branch according to any one of claims 4 to 6 . A method for protecting a branch part of a wire harness by covering the branch part of a wire harness with a protective sheet,
It is composed of one sheet material and is divided into two areas, one main sheet part and one wrapping part,
The main body sheet portion has a size that covers a continuous side surface of the branch portion,
The wrapping portion has a shape obtained by cutting a linear slit in a plane, and has a plurality of belt portions extending from the main sheet portion, and has an adhesive layer on at least a tip portion on one side of the belt portion. Using the provided protective sheet,
The main body sheet part is placed along the continuous side surface of the wire harness, with the band extending to the side where the branch wire is present, which is different from the part of the main body sheet part having the continuous side surface. After covering the side surface of the branch part with the main body sheet part,
Wrapping and fixing the band portion over the wire harness and the main body sheet portion ,
In the first stage of covering the side surface of the wire harness with the main body sheet part, some of the band parts are folded over in the direction of the main body sheet part.
How to protect branch parts of wire harness.

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