JP2015030785A - Adhesive sheet and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive sheet which allows improvement of fitting accuracy without deterioration of fitting workability.SOLUTION: An adhesive sheet 20 includes a sheet substrate 21 and an adhesive layer 25 laminated on the sheet substrate 21 and is used to hold an electric wire 10 along a folding part 31 by folding so that edges of the adhesive layer 25 are superimposed mutually. In the sheet substrate 21, a brittle part 33 for facilitating folding of the folding part 31 is formed along the folding part 31.

Description

  The present invention relates to an adhesive sheet and a wire harness.

  Patent Document 1 discloses a configuration in which an electric wire arranged in a predetermined form is sandwiched between single-sided pressure-sensitive adhesive sheets so as to maintain the electric wire arrangement form.

JP 2012-161234 A

  FIG. 4 is a diagram showing the configuration described in Patent Document 1 as a conventional example, FIG. 4 (a) is an exploded perspective view showing a wire harness according to the conventional example, and FIG. 4 (b) is FIG. 4 (a). It is a perspective view after the assembly of the shown wire harness.

  In the wire harness 101 shown in FIG. 4, a part of the electric wire 103 is covered with an adhesive sheet 105. The adhesive sheet 105 is composed of a first adhesive sheet material 107 and a second adhesive sheet material 109. The 1st adhesive sheet material 107 is a sheet | seat provided with the sheet | seat base material (not shown) which has the surface material 115 laminated | stacked on the surface, and the adhesion layer 111 laminated | stacked on the back surface of the said sheet | seat base material. . The 1st adhesive sheet material 107 is shape | molded according to a part of predetermined | prescribed wiring path | route shape. Similar to the first pressure-sensitive adhesive sheet material 107, the second pressure-sensitive adhesive sheet material 109 is a sheet in which a surface material 115 and a pressure-sensitive adhesive layer 111 are laminated on the front and back surfaces of a sheet base material. It is formed into a shape in which the surfaces (back surfaces) are combined.

  To assemble the wire harness 101, first, as shown in FIG. 4A, a second adhesive sheet material 109 is laid on a work table or the like with the adhesive layer 111 facing up. Then, the electric wire 103 is placed on the second adhesive sheet material 109 so that the second adhesive sheet material 109 is positioned in a predetermined wiring form. If the electric wire 103 is mounted, the 1st adhesive sheet material 107 will be covered from the top. At this time, the first adhesive sheet material 107 has the adhesive layer 111 facing down. Then, the 1st adhesive sheet material 107 and the 2nd adhesive sheet material 109 are crimped | bonded. Thereby, as shown in FIG.4 (b), the wire harness 101 with which the electric wire 103 was pinched | interposed and hold | maintained between the adhesive sheets 105 is completed.

  By the way, in the assembly work of the wire harness 101 according to the above-described conventional example, when the first pressure-sensitive adhesive sheet material 107 and the second pressure-sensitive adhesive sheet material 109 are bonded to each other, due to an attachment error, between the two sheet materials. Deviation may occur. When this deviation occurs, a part of the adhesive layer is exposed, so it is preferable to eliminate the deviation as much as possible. However, if excessive care is required for the bonding operation of both sheets, the mounting workability may be reduced.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the adhesive sheet and wire harness which can improve attachment precision, without reducing attachment workability | operativity.

In order to achieve the above-described object, the pressure-sensitive adhesive sheet and the wire harness according to the present invention are characterized by the following points.
(1) A pressure-sensitive adhesive for sandwiching an electric wire along the folded portion by folding back so that the pressure-sensitive adhesive layers are combined with each other, including a sheet base material and a pressure-sensitive adhesive layer laminated on the sheet base material. A sheet,
In the sheet base material, a fragile portion for facilitating folding of the folded portion is formed along the folded portion.
about.
(2) The pressure-sensitive adhesive sheet having the constitution (1) above,
The adhesive layer is a self-adhesive layer that can be bonded only by combining the adhesive layers.
about.
(3) The pressure-sensitive adhesive sheet having any one of the above (1) and (2),
The fragile portion is a perforation formed in the sheet base material.
about.
(4) An electric wire is sandwiched along the folded portion by the folded adhesive layer of the adhesive sheet of any one of the above (1) to (3), whereby the adhesive sheet is attached to the electric wire. Wire harness.

According to the pressure-sensitive adhesive sheet of (1) above, since the fragile portion for facilitating folding of the folded portion is formed along the folded portion, the pressure-sensitive adhesive sheet is attached to the electric wire so that the folded portion is in a state along the electric wire. When attaching them close to each other, the weakened portion becomes a mark for the worker. Thereby, since an operator can make an adhesive sheet approach an electric wire easily so that an electric wire may follow a folding | returning part, it can improve the attachment precision of the adhesive sheet with respect to an electric wire, without reducing attachment workability | operativity. it can.
Further, according to the pressure-sensitive adhesive sheet of (1), since the folded portion is easily folded by the weakened portion, the pressure-sensitive adhesive sheet can be easily and accurately aligned along the bent portion that appears as a result of folding the folded portion. It can be attached close to the wire.
According to the pressure-sensitive adhesive sheet of (2) above, since the pressure-sensitive adhesive layer is a self-adhesive layer that can be bonded only by combining the pressure-sensitive adhesive layers, the electric wire is difficult to adhere to the pressure-sensitive adhesive layer. For this reason, when an electric wire is made to contact the position which shifted | deviated from the folding | returning part accidentally, it can reattach to a desired position again. That is, for example, if the adhesive layer is a general adhesive layer that can be adhered to objects other than the adhesive layer, if the wire is accidentally brought into contact with the position shifted from the folded portion, May adhere to the pressure-sensitive adhesive layer, and reattachment may be troublesome. On the other hand, according to the adhesive sheet of the above (2), even when the electric wire is accidentally brought into contact with the position shifted from the folded portion, the electric wire can be reattached along the fragile portion. it can. And after arrange | positioning reliably in a desired position, an electric wire can be clamped in the said position by match | combining adhesion layers.
In addition, according to the adhesive sheet of (2) above, when attaching the adhesive sheet to the electric wire, the electric wire is moved along the bent portion appearing by the bending while bending the folded portion that is easily bent by the fragile portion. If it does, it will move so that an electric wire may approach the said bending part. Thereby, since an operator can attach an adhesive sheet to an electric wire very easily, the attachment accuracy of the adhesive sheet with respect to an electric wire can further be improved.
According to the pressure-sensitive adhesive sheet of (3) above, the fragile portion can be realized with a simple configuration, and the manufacturing cost can be reduced.
According to the wire harness of said (4), the wire harness which the attachment precision of the adhesive sheet with respect to an electric wire improved can be implement | achieved, without reducing workability | operativity. Moreover, the attachment state of an adhesive sheet can also be confirmed by comparing the extension direction of the weak part after attachment with the extension direction of an electric wire.
In addition, in the said description, although the aspect which attached the adhesive sheet to an electric wire was demonstrated, you may make an electric wire approach to an adhesive sheet and attach. That is, the adhesive sheet may be attached close to the electric wire located at the predetermined routing position, or the electric wire may be attached close to the adhesive sheet laid at the predetermined wiring position. .

  ADVANTAGE OF THE INVENTION According to this invention, the adhesive sheet and wire harness which can improve attachment precision, without reducing attachment workability | operativity can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a perspective view showing a wire harness according to the present embodiment. 2A and 2B are views showing the pressure-sensitive adhesive sheet, FIG. 2A is a perspective view seen from the front surface side, and FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A. FIG. 3 is a perspective view showing an adhesive sheet and an electric wire in the attachment process. FIG. 4 is a view showing a conventional example, FIG. 4 (a) is an exploded perspective view showing a wire harness according to the conventional example, and FIG. 4 (b) is a diagram after assembly of the wire harness shown in FIG. 4 (a). It is a perspective view.

  Hereinafter, the adhesive sheet and the wire harness according to the present embodiment will be described with reference to the drawings. FIG. 1 is a perspective view showing a wire harness according to the present embodiment.

  As shown in FIG. 1, the wire harness 1 according to the present embodiment includes an electric wire 10 and an adhesive sheet 20 attached to the electric wire 10 by adhesion. In the wire harness 1, as will be described later, the electric wire 10 is held along the folded portion 31 by the adhesive layer 25 that is folded back of the adhesive sheet 20, and the adhesive sheet 20 is attached to the electric wire 10 by adhesion between the adhesive layers 25. It is attached. That is, the pressure-sensitive adhesive sheet 20 is a pressure-sensitive adhesive sheet for sandwiching the electric wire along the folded portion by being folded so that the pressure-sensitive adhesive layers 25 are joined together.

  The electric wire 10 is configured by bundling an electric wire having a conductive core wire (not shown) and an insulating coating (not shown) made of a synthetic resin covering the outer periphery of the core wire. . That is, the electric wire 10 is an electric wire bundle and has a plurality of electric wires. In addition, the electric wire 10 may consist of a single electric wire, or a plurality of electric wires may be twisted into a bundle shape.

2A and 2B are diagrams showing the pressure-sensitive adhesive sheet. FIG. 2A is a perspective view seen from the front side, and FIG. 2B is a cross-sectional view.
The pressure-sensitive adhesive sheet 20 shown in FIG. 2 is a single-sided pressure-sensitive adhesive sheet, and is a self-adhesive sheet that can be bonded only by combining its own pressure-sensitive adhesive surfaces (back surfaces). In other words, the pressure-sensitive adhesive sheet 20 can be easily bonded simply by matching the pressure-sensitive adhesive surfaces (back surfaces). Furthermore, the adhesive sheet 20 does not stick the adhesive layer 25 to the electric wire 10 or the fingers of the operator, and does not deteriorate the mounting workability. The pressure-sensitive adhesive sheet 20 includes a sheet base material 21 and a pressure-sensitive adhesive layer 25 laminated on the back surface of the sheet base material 21. The sheet base 21 has a main body 22 made of a PP (polypropylene) foaming agent and a surface material 23 laminated on the surface side of the main body 22. In other words, the surface material 23 is laminated on the front surface side of the main body portion 22, and the adhesive layer 25 is laminated on the back surface side of the main body portion 22. For the surface material 23, craft paper, liner board, PET (polyethylene terephthalate) film, PP film, non-woven fabric, or the like can be used. In the present embodiment, the surface material 23 is waterproof. That is, the surface material 23 is made of, for example, PP or PET as described above. The adhesive sheet 20 has a tensile strength of 49 N / cm width in the vertical direction, 23 N / cm width in the horizontal direction (conforming to JIS K-6767), tear strength of 7.8 N in the vertical direction, and 6. in the horizontal direction. It has characteristics such as 8N (based on JIS K-6767), water vapor permeability of 0.0052 g / cm ² · 24 hrs (FS-101B), and initial adhesive strength of 2.5 N / cm width (T-type peel test). As this adhesive sheet 20, for example, Cro-nel (registered trademark) or the like can be used.
The pressure-sensitive adhesive sheet 20 is not limited to the above-mentioned single-sided self-adhesive sheet, and a known pressure-sensitive adhesive sheet in which a general pressure-sensitive adhesive that can adhere to other than its own pressure-sensitive adhesive surface is laminated on the back surface of the sheet substrate 21 is used. You can also. Moreover, the adhesive sheet 20 may not include the foaming agent (main body portion 22). That is, the sheet base material 21 may be composed only of the surface material (skin material) 23.

  As shown in FIG. 2, a linear fragile portion 33 is formed on the sheet base material 21 along the folded portion 31 so that the folded portion 31 can be easily folded. That is, the fragile portion 33 is formed at a position along the electric wire 10 when the adhesive sheet 20 is attached to the electric wire 10. In the present embodiment, the fragile portion 33 is a perforation formed in the surface material 23 of the sheet base material 21. That is, the fragile portion 33 is formed by repeatedly breaking the surface material 23 by a predetermined length at a predetermined interval, and is formed more fragile than other portions of the surface material 23. . In the present embodiment, the ruptured portion and the non-ruptured portion are formed to have substantially the same length. By forming the fragile portion 33 described above, the pressure-sensitive adhesive sheet 20 is easily folded at the folded portion 31.

  The fragile portion 33 is not limited to the perforation, and may be any one that allows the adhesive sheet 20 to be easily folded at the folded portion 31. For example, the length of the rupture portion and the repetition interval in the perforation shown in FIG. 2 can be appropriately changed. In the present embodiment, the surface material 23 is completely broken from the front surface to the back surface at the broken portion, but is not completely broken and is broken from the surface to a predetermined depth. You may be the structure which has. Alternatively, the main body portion 22 may be broken to a predetermined depth from the surface in addition to the surface material 23 in the broken portion.

  Next, the attachment method with respect to the electric wire 10 of the adhesive sheet 20 is demonstrated. FIG. 3 is a perspective view showing an adhesive sheet and an electric wire in the attachment process.

  When attaching the pressure-sensitive adhesive sheet 20 to the electric wire 10, the operator uses the fragile portion 33 as a mark, and the adhesive sheet 20 is attached from the pressure-sensitive adhesive layer 25 side so that the fragile portion 33 follows the electric wire 10 as shown in FIG. 3. Move closer to the wire 10. At this time, since the fragile portion 33 is formed in the pressure-sensitive adhesive sheet 20 according to the present embodiment, the operator can easily bring the pressure-sensitive adhesive sheet 20 closer to the electric wire 10 so that the electric wire 10 follows the folded portion 31. it can. Further, since the fragile portion 33 is formed in the pressure-sensitive adhesive sheet 20 and it is easy to bend at the folded portion 31, the operator can fold the pressure-sensitive adhesive sheet 20 at the folded portion 31 along the bent portion that appears by the folding. The pressure-sensitive adhesive sheet 20 can be attached close to the electric wire 10 easily and accurately.

  After the adhesive sheet 20 is moved to a desired attachment position with respect to the electric wire 10, the operator adheres the adhesive layers 25 together. Thereby, the adhesive sheet 20 is attached to the electric wire 10 as shown in FIG.

  In the pressure-sensitive adhesive sheet 20 according to this embodiment, since the pressure-sensitive adhesive layer 25 is a self-adhesive layer that can be bonded only by combining the pressure-sensitive adhesive layers 25, the electric wire 10 is difficult to adhere to the pressure-sensitive adhesive layer 25. For this reason, when the electric wire 10 is made to contact the position which shifted | deviated from the folding | returning part 31 accidentally, it can reattach to a desired position again. Therefore, after arrange | positioning reliably in a desired position, the electric wire 10 can be clamped in the said position by match | combining the adhesion layers 25.

  Further, when the adhesive sheet 20 is attached to the electric wire 10, the electric wire 10 is moved on the adhesive layer 25 along the bent portion that appears by the bending while bending the folded portion 31 that is easily bent by the fragile portion 33. If it does, it will move so that the electric wire 10 may approach the said bending part 31. FIG. That is, at the time of attachment work, the operator moves the pressure-sensitive adhesive sheet 20 in a direction in which the fragile portion 33 and the wire 10 are in a positional relationship while pressing the pressure-sensitive adhesive layer 25 side of the pressure-sensitive adhesive sheet 20 against the wire 10. Thereby, the adhesive sheet 20 can be arrange | positioned in a desired attachment position. Therefore, according to the adhesive sheet 20 which concerns on embodiment, the adhesive sheet 20 can be easily attached to the electric wire 10, and the attachment precision of the adhesive sheet with respect to an electric wire improves.

Below, it summarizes about the adhesive sheet 20 and the wire harness 1 which concern on embodiment.
(1) The pressure-sensitive adhesive sheet 20 according to the embodiment includes a sheet base material 21 and a pressure-sensitive adhesive layer 25 laminated on the sheet base material 21, and is folded so that the pressure-sensitive adhesive layers 25 are combined. It is an adhesive sheet for sandwiching the electric wire 10 along the folded portion 31. In the sheet base material 21, a fragile portion 33 is formed along the folded portion 31 to facilitate folding the folded portion 31.
(2) In the pressure-sensitive adhesive sheet 20 according to the embodiment, the pressure-sensitive adhesive layer 25 is a self-adhesive layer that can be bonded only by combining the pressure-sensitive adhesive layers 25 together.
(3) In the pressure-sensitive adhesive sheet 20 according to the embodiment, the fragile portion 33 is a perforation formed in the sheet base material 21.
(4) In the wire harness 1 according to the embodiment, the electric wire 10 is sandwiched along the folded portion 31 by the adhesive layer 25 folded back of the adhesive sheet 20, whereby the adhesive sheet 20 is attached to the electric wire 10. It is the attached wire harness.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

  For example, in the above-described embodiment, the case where the pressure-sensitive adhesive sheet 20 is attached to the linear portion of the electric wire 10 has been described, but the adhesive sheet 20 may be attached so as to include the branched portion of the electric wire 10.

DESCRIPTION OF SYMBOLS 1 Wire harness 10 Electric wire 20 Adhesive sheet 21 Sheet base material 22 Main body part 23 Surface material 25 Adhesive layer 31 Folding part 33 Fragile part

Claims (4)

A pressure-sensitive adhesive sheet comprising a sheet base material and an adhesive layer laminated on the sheet base material, and being folded so that the pressure-sensitive adhesive layers are combined with each other, thereby sandwiching an electric wire along the folded portion. And
In the sheet base material, a fragile portion for facilitating folding of the folded portion is formed along the folded portion.
A pressure-sensitive adhesive sheet. The adhesive layer is a self-adhesive layer that can be bonded only by combining the adhesive layers.
The pressure-sensitive adhesive sheet according to claim 1. The fragile portion is a perforation formed in the sheet base material.
The pressure-sensitive adhesive sheet according to any one of claims 1 and 2.   An electric wire is sandwiched along the folded portion by the folded adhesive layer of the pressure-sensitive adhesive sheet according to any one of claims 1 to 3, whereby the pressure-sensitive adhesive sheet is attached to the wire. The wire harness characterized by being.

Images