JP2016025821A - Sheet member, cylindrical member, and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet member which enables the configuration of a cylindrical member of high flexibility and can be manufactured at a low cost, to provide a cylindrical member composed of the sheet member, and to provide a wire harness having the cylindrical member.SOLUTION: A first angle θ1 formed by a pair of first side parts 121 is smaller than a second angle θ2 formed by a pair of second side parts 122. Therefore, a cylindrical member 3 composed of a sheet member 10 is able to have high flexibility even if its diameter is increased. When the sheet member 10 is curved, an inclining frame part 111 is easily bent near the second side parts 122 by virtue of the large second angle θ2, thus enabling improved workability. The cylindrical member 3 having high flexibility can be composed of the sheet member 10 in a wide range of diameter. Additionally, the need to form a thin hinge part on the sheet member 10 is eliminated, thus enabling low cost manufacture.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sheet member capable of forming a cylindrical member having flexibility by being rounded, a cylindrical member configured by the sheet member, and a wire harness including the cylindrical member.
About.

  In general, a curved exterior portion of a wire harness is provided with a cylindrical exterior material that covers and protects the outer periphery of the electric wire and can be bent. As such an exterior material, it has been proposed to use a tubular member obtained by rounding a sheet member (see, for example, Patent Document 1). The sheet member for the exterior material described in Patent Document 1 is formed in a strip shape, and recessed portions and convex portions are alternately arranged side by side, and the thin hinge portion extends in a direction orthogonal to the direction of arrangement. By being formed, the hinge portion can be bent and rounded. Thus, the cylindrical member formed by rolling a sheet | seat member has the recessed part and convex part which were alternately arranged in parallel along the axial direction.

JP 2003-259528 A

  However, in the sheet member for the exterior material described in Patent Document 1, in order to form the hinge portion, in addition to the process of forming irregularities on the flat member, a process of changing the thickness must be performed, There was a disadvantage that the manufacturing cost would increase.

  An object of the present invention is to provide a sheet member that can be formed at a low cost while being able to constitute a highly flexible tubular member, a tubular member constituted by the sheet member, and a wire including the tubular member To provide a harness.

  In order to solve the above-described problems and achieve the object, the invention described in claim 1 is formed in a strip shape and can be configured as a cylindrical member having a longitudinal direction as an axial direction by being rounded in the width direction. A sheet member, on a surface that is an outer peripheral surface of the cylindrical member, a plurality of polygonal lattice-shaped frame portions having a pair of apexes at both ends in the width direction, and a recess surrounded by the frame portion, A pair of first sides that gradually separate in the longitudinal direction from each of the apexes toward the central portion of the opening in the width direction, and the pair of first sides A pair of second sides that are continuous with each of the sides and further gradually away in the longitudinal direction toward the center, and the extension lines of the pair of second sides are the apexes Intersect at a position aligned in the width direction, The first angle first side portions serial pair is formed by a sheet member characterized by extension between the second side portion of the pair is different from the second angle formed.

  The invention described in claim 2 is the invention according to claim 1, wherein the first angle is smaller than the second angle.

  The invention described in claim 3 is the invention described in claim 1 or 2, wherein an integer number of the frames larger than the number obtained by dividing 180 ° by the smaller one of the first angle and the second angle. The parts are arranged in parallel in the width direction.

  Invention of Claim 4 is the cylindrical member comprised by rolling a sheet | seat member, Comprising: The said sheet member is comprised with the sheet | seat member described in any one of Claims 1-3. It is the cylindrical member characterized by having.

  The invention described in claim 5 is a wire harness configured by inserting an electric wire through a cylindrical member, and the cylindrical member is configured by the cylindrical member described in claim 4. It is a wire harness characterized by these.

  According to the invention described in claim 1, the first angle formed by the pair of first side portions is different from the second angle formed by the extension lines of the pair of second side portions. If the diameter of the cylindrical member to be formed is equal to or less than the polygonal diameter determined by the smaller one of the first angle and the second angle and the dimension between the vertices, the pair of sides having a smaller angle are formed The recess can be deformed so as to approach, and can have high flexibility. Furthermore, when trying to form a cylindrical member having a small diameter by this sheet member, the sheet member is easily bent in the width direction in the vicinity of the pair of sides having a larger angle, and the rounding operation can be easily performed. it can.

  That is, in the sheet member in which the angle equal to the smaller one of the first angle and the second angle is formed at the apex, the maximum diameter that can ensure high flexibility and the sheet member formed at the apex that is equal to the larger one In the range between the minimum diameter in which the rounding work is easy, the tubular member can be configured while ensuring high flexibility by the sheet member of the present invention. Further, it is not necessary to form a thin-walled hinge portion unlike a conventional sheet member, and it can be manufactured at a low cost.

  According to the invention described in claim 2, since the first angle is smaller than the second angle, the concave portion can be easily deformed so that the pair of first side portions approach each other as described above.

  According to the invention described in claim 3, the number of juxtaposed portions in the width direction of the frame portion is an integer greater than the number obtained by dividing 180 ° by the smaller one of the first angle and the second angle. Even when the first side portion or the second side portion constitutes a cylindrical member having a maximum diameter that can be easily deformed, a concave portion is formed over the entire circumferential direction, so that it can have flexibility. Furthermore, the cylindrical member can be constituted by overlapping the end sides along the longitudinal direction, and the member inserted inside can be reliably covered.

  According to the invention described in claim 4, as described above, a cylindrical member having high flexibility can be formed, and the diameter of the cylindrical member can be set in a wide range.

  According to the invention described in claim 5, the diameter of the cylindrical member can be set in a wide range as described above according to the diameter and number of the electric wires, and the cylindrical shape according to the wiring direction of the electric wires. The member can be easily bent.

It is a perspective view showing a wire harness concerning an embodiment of the present invention. It is a top view which shows the sheet | seat member which forms the cylindrical member of the wire harness of FIG. It is a top view which expands and shows the principal part of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is a top view which shows a mode that the sheet | seat member of FIG. 2 deform | transformed. It is a schematic diagram which shows the relationship of each part at the time of the cylindrical member of the wire harness of FIG. 1 bending. It is a top view which shows the sheet | seat member of a comparative example. It is a front view which shows a mode that the cylindrical member formed with the sheet | seat member of FIG. 8 was compressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the wire harness 1 of the present embodiment includes a plurality of electric wires 2 and a cylindrical member 3 that covers the entire outer periphery of the plurality of electric wires 2 and extends in a predetermined axial direction. The wire harness 1 is provided, for example, in a vehicle to connect electrical components to each other and is used for power supply / reception and transmission of an electrical signal, and is appropriately bent in a vehicle structure.

  The electric wire 2 is a covered electric wire including a conducting wire portion 21 and a covering portion 22 that covers the outer periphery of the conducting wire portion 21. The conducting wire portion 21 may be formed by twisting a plurality of fine wires, or may be constituted by one conductor. Moreover, the number of the electric wires 2 and each outer diameter should just be set arbitrarily, and not only a covered electric wire but the signal wire may be provided.

  The cylindrical member 3 is configured such that the sheet member 10 shown in FIGS. 2 to 5 is rolled in the width direction so that the longitudinal direction is the axial direction, and the outer circumferential surface 3 </ b> A has irregularities. The cylindrical member 3 is formed in a substantially cylindrical shape as a whole by overlapping the edges along the longitudinal direction of the sheet member 10. Both ends of the cylindrical member 3 in the axial direction are fixed to the electric wire 2 by taping members 4.

  Hereinafter, the detailed shape of the sheet member 10 will be described. The sheet member 10 is, for example, a substrate made of resin and heated and formed with irregularities by an appropriate mold, and is formed in a belt shape in which one direction is a longitudinal direction and the other direction is a width direction, As shown in FIG. 2, a plurality of polygonal lattice-shaped frame portions 11 having two vertices V that are paired with both end portions in the width direction on the first surface 10 </ b> A serving as the outer peripheral surface 3 </ b> A of the cylindrical member 3, And a recess 12 surrounded by a frame portion. The frame part 11 and the recessed part 12 are formed in the whole sheet | seat member 10, and in this embodiment, the seven recessed parts 12 are arranged in parallel by the width direction.

  Although the frame part 11 is in contact with the first side part 121 and the second side part 122 having different inclination angles as will be described later, the frame part 11 is formed in a hexagonal shape as a whole and is inclined in the width direction and the longitudinal direction. It has the inclination frame part 111 and a pair of parallel frame part 112 extended in the width direction. The adjacent frame parts 11 share the inclined frame part 111 or the parallel frame part 112. In addition, the parallel frame part 112 may be abbreviate | omitted and the frame part 11 whole may be formed in the rhombus shape.

  As shown in FIG. 3 in an enlarged manner, the recess 12 has a pair of first side portions 121 whose opening shape gradually separates in the longitudinal direction from each vertex V toward the central portion in the width direction of the opening shape. And extending in the width direction between the pair of second sides 122 that are continuous with each of the pair of first sides 121 and are gradually separated in the longitudinal direction toward the center. And a pair of parallel side portions 123.

  The pair of first side portions 121 are formed symmetrically with each other and form a first angle θ1 at the vertex V. Further, the pair of second side portions 122 are formed symmetrically with each other, and the extension lines intersect with the vertex V at a position aligned in the width direction, and form a second angle θ2. In the present embodiment, the first angle θ1 is 30 °, and the second angle θ2 is 60 °.

  As shown in FIG. 4, the cross-sectional shape along the width direction of the concave portion 12 is a pair of width-direction inclined portions 124 having inclinations that move away from the first surface 10 </ b> A toward the center portion in the width direction of the concave portion 12 from the vertex V. And a bottom portion 125 extending in the width direction between the pair of width direction inclined portions 124.

  As shown in FIG. 5, the cross-sectional shape along the longitudinal direction of the concave portion 12 is a pair of long-sided slopes that are inclined away from the first surface 10 </ b> A toward the longitudinal central portion of the concave portion 12 from each of the parallel frame portions 112. It has the direction inclination part 126 and the V-shaped corner | angular part 127 where the longitudinal direction inclination part 126 cross | intersects.

  When the sheet member 10 as described above is rolled in the width direction, the pair of width direction inclined portions 124 sandwiching the bottom portion 125 is deformed so as to be away from each other while maintaining the shape of the bottom portion 125, thereby being parallel to the bottom portion 125. The frame part 112 approaches each other, and becomes the cylindrical member 3 whose circumferential direction is the width direction. In the formed cylindrical member 3, the frame portion 11 is located on the surface thereof, and the width direction inclined portion 124, the bottom portion 125, the longitudinal direction inclined portion 126, and the corner portion 127 are located inside the surface. At this time, the sheet member 10 is easily rounded as the inclined frame portion 111 is inclined with respect to the width direction. That is, the larger the first angle θ1, the more easily the sheet member 10 is rounded in the vicinity of the first side portion 121, and the larger the second angle θ2, the easier the sheet member 10 is rounded in the vicinity of the second side portion 122.

  Next, deformation of each part when the cylindrical member 3 is bent will be described. When the tubular member 3 is bent, the recess 12 is deformed so as to be compressed inside the bending direction, and the recess 12 is deformed so as to be extended outside. Hereinafter, although a state where each part is deformed in the recessed part 12 to be compressed will be described, the same part is also deformed in the recessed part 12 to be extended.

  When the recess 12 is compressed in the longitudinal direction, the pair of longitudinally inclined portions 126 approach each other so that the V-shaped corner 127 shown in FIG. 5 becomes sharper. At this time, since the diameter of the cylindrical member 3 is kept substantially constant, the interval between the vertexes V is also substantially constant. When the concave portion 12 is viewed in plan as the sheet member 10, as shown in FIG. 6, the pair of first side portions 121 approach each other and the first angle θ <b> 1 decreases, and the pair of second side portions 122 become mutually opposite. Approaching, the second angle θ2 becomes smaller.

  Further, a case where the concave portion 12 is deformed so that the bending is increased so that the pair of first side portions 121 overlap with each other will be schematically described with reference to FIG. Note that FIG. 2 is referred to for the positional relationship of the following recesses 12A to 12C. As shown in FIG. 7A, in the recess 12A, the angle formed by the virtual line segment VL connecting the vertices V and the first side 121 is half of the first angle θ1 when viewed from the longitudinal direction. It becomes. Therefore, the angle θ3 formed by the extension lines of the first side 121 in the recess 12A is 180 ° −θ1. Furthermore, when the pair of first side parts 121 are also overlapped in the adjacent concave parts 12B sharing the inclined frame part 111, the angle θ3 formed by the first side parts 121 is 180 ° −θ1. When this is repeated, when θ1 is a fraction of 360 °, the value obtained by dividing 360 ° by θ1 by the first side portion 121 of the plurality of recesses 12 and its extension line is positive n. A square (in the present embodiment, a regular dodecagon) is formed. Further, if θ1 is a fraction of an integer of 180 °, a regular k-gon (a regular hexagon in this embodiment) having a value obtained by dividing 180 ° by θ1 by a line segment VL connecting the vertices V to each other is represented by k. It is formed.

  When the cylindrical member 3 is configured such that the regular k-square is formed by the line segment VL connecting the vertices V, the cylindrical member 3 has high flexibility. When the sheet member 10 is rounded so that the diameter of the cylindrical member 3 is larger than this, as shown in FIG. 7B, the angle formed by the line segments VL connecting the vertexes V increases, and this angle is Assuming a state in which the pair of first side parts 121 are overlapped with each other while maintaining, the angle θ3 formed by the first side parts 121 increases. In order to overlap the first side parts 121 in this way, in the recessed part 12B adjacent to the longitudinal direction (axial direction) while sharing the inclined frame part 111 with the recessed parts 12A and 12C adjacent to the width direction (circumferential direction), In order to increase the dimension between the vertices V, the sheet member 10 must be stretched and deformed. Since the resin sheet member 10 is not easily stretched and deformed at room temperature, if the cylindrical member 3 having such a large diameter is configured as described above, the flexibility is lowered.

  On the other hand, when the sheet member 10 is rounded so that the diameter of the cylindrical member 3 is reduced, the angle formed by the line segments VL is reduced, and the pair of first side portions 121 are overlapped while maintaining this angle. Then, as shown in FIG. 7C, the angle θ3 formed by the first side portions 121 decreases. In order to overlap the first side portions 121 in this way, the sheet member 10 must be contracted and deformed in order to reduce the dimension between the vertices V in the recess 12B. The resin sheet member 10 can be shrunk by being bent or bent at an appropriate position, and even if the cylindrical member 3 having a small diameter is configured, a decrease in flexibility can be suppressed.

  That is, when the sheet member 10 constitutes the tubular member 3 having a smaller diameter than the regular k-square shape determined from the dimension between the vertices V and the first angle θ1, the tubular member 3 has high flexibility. Have. Even when the first angle θ1 is not an integral fraction of 180 °, the maximum diameter for the tubular member 3 to have high flexibility is determined from the dimension between the apexes V and the first angle θ1. As the first angle θ1 is smaller, the maximum diameter is larger.

  Here, while showing the sheet member 100 of a comparative example in FIG. 8, the deformation | transformation of each part at the time of bending the cylindrical member 200 comprised by this sheet member 100 is demonstrated.

  A sheet member 100 shown in FIG. 8A has a plurality of rhombus-shaped frame portions 102 having apexes 101 at both ends in the width direction, and concave portions 103 surrounded by the frame portions 102 on the surface. The frame portion 102 is formed in a convex shape, and the concave portion 103 is formed in a concave shape so as to incline toward the back side of the paper surface from the vertex 101 in the width direction and the vertex 105 in the longitudinal direction toward the concave vertex portion 106 at the center. Has been. The opening shape of the recess 103 is a rhombus shape having four inclined sides 104. The sheet member 100 is a cylindrical member having the longitudinal direction as an axis by being rounded so that the surface on which the frame portion 102 and the recess 103 are formed becomes an outer peripheral surface and the width direction is the circumferential direction.

  When this cylindrical member is bent, the cylindrical member is compressed on the inner side in the bending direction and extended on the outer side, and the sheet member 100 is deformed on the compressed side as shown in FIG. 8B. That is, when the inclined sides 104 provided with the apex 101 sandwiched therebetween approach each other, the concave portion 103 has a rhombus shape compressed in the longitudinal direction (axial direction). On the other hand, the sheet member 100 has a rhombus shape in which the concave portion 103 is elongated in the longitudinal direction (axial direction) on the side to be elongated.

  However, in order for the recess 103 to be easily deformed, the diameter of the cylindrical member is restricted. The cylindrical member 200 is viewed in the axial direction when the concave portion 103 is completely compressed and the pair of vertices 105 in the longitudinal direction of the frame portion 102 overlap each other, that is, the inclined sides 104 sandwiching the vertex 101 overlap each other. This is shown in FIG. At this time, an angle θ10 formed by the inclined sides 104 sandwiching the vertex 101 in FIG. 8 is set to 60 °. When these inclined sides 104 overlap with each other, the angle θ20 formed by the virtual line segment VL connecting the inclined sides 104 and the vertices 101 becomes 30 ° which is half of the angle θ10. The angle θ30 is 120 °, and a regular hexagon is formed by the inclined side 104.

  When the diameter of the cylindrical member 200 is increased, the sheet member 100 must be stretched and deformed so as to increase the dimension between the apexes 101 when the inclined sides 104 are brought closer to each other, and the flexibility is lowered. Resulting in. That is, in order to ensure flexibility, the diameter of the cylindrical member 200 needs to be equal to or less than a value determined by the angle θ10 formed by the inclined sides 104 and the dimension between the apexes 101. On the other hand, if the angle θ10 is reduced or the dimension between the vertices 101 is increased, the diameter of the tubular member 200 that can be bent can be increased. If it is going to form 200, rounding will become difficult. Therefore, with one type of sheet member 100, the highly flexible tubular member 200 can be formed only with a narrow range of diameters.

  According to this embodiment, there are the following effects. That is, since the first angle θ1 formed by the pair of first side portions 121 is smaller than the second angle θ2 formed by the pair of second side portions 122, the cylindrical member 3 determined from the first angle θ1 is high. The maximum diameter for having flexibility can be increased. Furthermore, since the second angle θ2 is large, when the sheet member 10 is rolled, the inclined frame portion 111 is easily bent in the vicinity of the second side portion 122, and workability can be improved. Therefore, compared with the sheet member 100 of the comparative example, the tubular member 3 having high flexibility can be configured by the sheet member 10 with a wide range of diameters. Further, it is not necessary to form a thin hinge portion on the sheet member 10, and the sheet member 10 can be manufactured at a low cost.

  Furthermore, since the first angle θ1 is 30 ° and seven concave portions 12 are arranged in the width direction, the sheet member 10 is rolled so that the line segment connecting the vertexes V forms a regular hexagon. The cylindrical member 3 can have high flexibility by forming the recess 12 over the entire circumferential direction of the outer peripheral surface 3A. Further, the tubular member 3 has an overlapping portion of the end sides along the longitudinal direction of the sheet member 10, and can reliably cover and protect the outer periphery of the electric wire 2. The same effect can be obtained when the cylindrical member 3 having a smaller diameter is formed.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention. For example, in the embodiment, the first angle θ1 formed by the pair of first sides 121 is smaller than the second angle θ2 formed by the pair of second sides 122, but the first angle and the second angle Different values may be used, and even if the first angle is larger than the second angle, the same effect as in the above embodiment can be obtained.

  In the above embodiment, the number of juxtaposed portions in the width direction of the recess 12 is larger than the number of regular polygon corners by the line segment connecting the vertices V determined by the first angle θ1, that is, at the first angle θ1. The integral number of recesses 12 larger than the number obtained by dividing 180 ° is arranged in the width direction. However, when the second angle θ2 is smaller than the first angle θ1, the second angle θ2 is 180 °. The same effects as those of the above-described embodiment can be obtained as long as the recesses are arranged in the width direction by an integer greater than the number obtained by dividing. In addition, the number of the recesses arranged in the width direction may be set as appropriate according to the diameter of the cylindrical member.

  Moreover, in the said embodiment, although the frame part 11 and the recessed part 12 shall be formed in the sheet | seat member 10 whole, a sheet | seat member has a frame part and a recessed part in the position where a bending | flexion is required when comprising a cylindrical member. It only has to have.

  Moreover, in the said embodiment, although the cylindrical member 3 comprised by the sheet | seat member 10 shall be used for the wire harness 1, a cylindrical member passes a suitable to-be-inserted object inside, and is bent. What is necessary is just to exist and it may replace with the conventional corrugated tube and may be used. In addition, for example, if the cylindrical member has airtightness or watertightness by welding edges along the longitudinal direction of the sheet member, the fluid may flow inside thereof.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations. Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

DESCRIPTION OF SYMBOLS 1 Wire harness 2 Electric wire 3 Tubular member 10 Sheet member 11 Frame part 12 Recessed part 121 1st edge part 122 2nd edge part (theta) 1 1st angle (theta) 2 2nd angle

Claims (5)

A sheet member capable of forming a cylindrical member having an axial direction as a longitudinal direction by being rounded in the width direction while being formed in a strip shape,
On the surface to be the outer peripheral surface of the cylindrical member, there are a plurality of polygonal lattice-shaped frame portions having a pair of apexes at both ends in the width direction, and concave portions surrounded by the frame portions,
Each of the pair of first sides and the pair of first sides that are gradually separated from each other in the longitudinal direction as the opening shape of the recesses extends from each of the apexes toward the center in the width direction of the opening shape. And a pair of second sides that gradually separate in the longitudinal direction toward the center portion, and
The extension lines of the pair of second sides intersect with the apex at a position aligned in the width direction,
The sheet member, wherein a first angle formed by the pair of first side portions is different from a second angle formed by extension lines of the pair of second side portions.   The sheet member according to claim 1, wherein the first angle is smaller than the second angle.   The integer number of the frame portions larger than the number obtained by dividing 180 ° by the smaller one of the first angle and the second angle are arranged in parallel in the width direction. 2. The sheet member according to 2. A cylindrical member configured by rolling a sheet member,
The said sheet | seat member is comprised by the sheet | seat member described in any one of Claims 1-3, The cylindrical member characterized by the above-mentioned. A wire harness configured by inserting an electric wire through a cylindrical member,
The said cylindrical member is comprised by the cylindrical member described in Claim 4, The wire harness characterized by the above-mentioned.

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