WO2010073854A1 - ワイヤハーネス用のネット状保護材および製造方法 - Google Patents
ワイヤハーネス用のネット状保護材および製造方法 Download PDFInfo
- Publication number
- WO2010073854A1 WO2010073854A1 PCT/JP2009/069552 JP2009069552W WO2010073854A1 WO 2010073854 A1 WO2010073854 A1 WO 2010073854A1 JP 2009069552 W JP2009069552 W JP 2009069552W WO 2010073854 A1 WO2010073854 A1 WO 2010073854A1
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- WIPO (PCT)
- Prior art keywords
- net
- vertical
- sheet
- protective material
- wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
- H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/0207—Wire harnesses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
- D03D1/0035—Protective fabrics
- D03D1/0043—Protective fabrics for elongated members, i.e. sleeves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1362—Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/69—Autogenously bonded nonwoven fabric
Definitions
- the present invention relates to a net-like protective material for a wire harness that is routed in a vehicle and a method for manufacturing the net-like protective material, and the net-like protective material is composed of a sheet or tube that is sheathed on the outer peripheral surface of a wire group of a wire harness. Is.
- the wire group is wrapped with adhesive tape, or the wire group is passed through a tube such as a corrugated tube or a round tube.
- a vinyl chloride tape has been widely used as an exterior material composed of these tapes and tubes, and polypropylene or the like has been used as a corrugated tube, both of which are made of resin.
- a net tube made of a resin yarn proposed in Japanese Utility Model Laid-Open No. 4-21119 is also used.
- the net tube uses a small amount of resin, the weight can be reduced and the cost can be reduced. Also, the net tube can be easily stretched and flexible, and the wire harness can be easily passed along the wiring route of the wire harness. There is an advantage that it can be bent easily. On the other hand, compared to the case where the wire harness is inserted into the closed cross-section space in the corrugated tube or cylindrical tube, the net tube exposes the wire group to the hole in the net, but the protection function is reduced. It can be used for a wiring area or the like where there is no possibility of interfering with.
- net tubes have advantages, but conventional net tubes are formed by knitting resin yarns such as polyester, polyethylene, and polypropylene to form a net, and are not excellent in flame retardancy. It is not suitable as an exterior material for wire harnesses routed in rooms. Further, the conventional net tube is formed in a net shape by knitting warp and weft to reverse adjacent intersections and warp and weft. Therefore, the bonding force between the warp and the weft at the intersection is weak. In some cases, the warp and weft are welded at the intersection, but as shown in FIG. 10, the outer peripheral surface of the warp 100 and the outer peripheral surface of the weft 101 are only welded in line contact. When a tensile force or a tearing force is applied to the intersection point, peeling at the intersection point, a so-called breakage occurs, and there is a problem that the shape retention force is low.
- resin yarns such as polyester, polyethylene, and polypropylene
- the present invention has been made in view of the above problems, and can also be used as an outer covering material for a wire harness routed in an engine room, and does not cause fraying at an intersection at a cut end and a bonding force so as not to peel off at the intersection.
- An object of the present invention is to provide a net-like protective material made of a sheet or tube for a wire harness with an improved height.
- the present invention has a net-like shape in which the intersection of the vertical line and the horizontal line made of a flame-retardant resin wire having an elliptical cross section is pressurized and heat-sealed, The vertical lines and horizontal lines are overlapped at the intersections without knitting, and either or both of the vertical lines and horizontal lines are embedded in the counterpart fiber by melting 40% to 50% of the cross-sectional area.
- the present invention provides a net-like protective material for a wire harness which is fused to each other in a state and is frayed at a cut end.
- the resin wire constituting the net-like protective material composed of the sheet or tube of the present invention is composed of a flame-retardant resin wire having an elliptical cross section, it is routed in the engine room of the vehicle. It can be sheathed on a wire harness. Also, at the intersection of vertical and horizontal lines, the outer peripheral surface is not welded by line contact, but the vertical line and horizontal line have an elliptical cross section, and one or both wires are embedded in the counterpart wire Since they are fused together, they are firmly fixed.
- the flame-retardant resin wire is bromine-based in one or more of halogen-free resin components selected from polypropylene, polyester, polyethylene, polyethylene terephthalate, polyamide, polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, and a mixture of two or more of these.
- a flame retardant selected from phosphate esters, metal hydroxides, and melamine is blended.
- polypropylene is most preferably used from the viewpoint of processability and cost.
- the flame retardant resin wire contains 0.5 to 100 parts by mass of the flame retardant with respect to 100 parts by mass of the resin component. Furthermore, 0 to 50 parts by mass of a filler composed of magnesium oxide and / or calcium carbonate may be blended with 100 parts by mass of the resin component as required.
- the vertical and horizontal lines of the present invention are not knitted so that adjacent intersections are upside down, but formed into a net shape with a sizing machine described later, for example, the vertical lines are on the upper side, the horizontal lines are on the lower side, The intersections of the vertical and horizontal lines are brought into surface contact, and as described above, they are fused so as to be embedded in the mating wire.
- the net-like protective material of the present invention consisting of the vertical and horizontal lines is a sheet or a tube, The sheet is bent into a cylindrical shape that wraps at both ends in the width direction. When it is set as a tube, the edge of the width direction of one sheet
- the strength of the net-like protective material of the present invention is such that the major axis of each vertical and horizontal line having the elliptical cross section is 0.35 mm to 0.5 mm, and the thickness of the net-like sheet is 0.4 to 0.8 mm.
- the longitudinal and transverse tensile strength is 15.7 N or more, the tear strength is 15.7 N or more, and the elongation is 150% or more.
- the longitudinal and transverse tensile strengths are measured values using a JIS No. 3 dumbbell.
- each hole surrounded by the vertical and horizontal lines is a square, a rectangle, a rhombus, a hexagon, or a circle of any one of a perfect circle, an ellipse, and an ellipse.
- the shape of the holes is adjusted according to the required stretchability and strength. In other words, the size of the holes is increased by making the net rougher when the demand for stretchability is high, and by making the holes finer when the demand for strength and wear resistance is high. The holes are made smaller.
- the shape of the pores is a rhombus shape to make it easy to stretch, and a square or rectangle to make it difficult to stretch.
- a large-diameter line and a small-diameter line are provided as the vertical line and the horizontal line, respectively, and a plurality of the small-diameter lines are arranged while being sandwiched between the large-diameter lines, and the small-diameter line is formed in a hole surrounded by the large-diameter lines. It is good also as a structure which has arrange
- this invention provides the manufacturing method of the said net-like protective material.
- the production method is to form a net-like sheet with a sizing machine between the vertical line and the horizontal line, heat and press at the time of the molding, heat-bonding the intersection of the vertical and horizontal lines in a pressurized state,
- the net-like sheet is cut into a required length, and both ends of the cut net-like sheet in the width direction are wrapped so as to have a cylindrical shape.
- a vertical sheet and a horizontal line are formed into a net-like sheet through a die of a sizing machine, and at the intersection of the vertical and horizontal lines by being heated and pressurized during the forming,
- the vertical and horizontal lines are in surface contact, and are fused so that they enter the other side line from one side line or the other side line, so that the coupling force at the intersection can be increased, and tensile and tearing forces are applied.
- a net-like sheet with a bending ridge in a cylindrical shape can be easily wound around the outer periphery of the wire group of the wire harness, and in a wound state, an adhesive tape is wound around both ends in the length direction. It is stuck.
- the wrapped portion is heat-sealed to obtain a tube in advance.
- the net-like protective material made of the sheet or tube for the wire harness of the present invention is fused at the intersection of the vertical and horizontal lines made of the flame-retardant resin wire having an elliptical cross section. It can be used as an exterior material for a wire harness that is required to be flame retardant in a room. And at the intersection of vertical and horizontal lines, the outer circumferential surface is not welded in line contact, but vertical and horizontal lines with an elliptical cross section are in surface contact, and one or both are embedded in the mating line. Since it is fused, it is firmly fixed.
- the weight can be reduced to 1 ⁇ 2 or less as compared with a conventional resin round tube.
- seat of this invention is shown, (A) is a perspective view, (B) is the elements on larger scale.
- (A) is a perspective view showing a flame-retardant resin thread material that becomes a vertical line and a horizontal line
- (B) is a perspective view showing a state where the vertical line and the horizontal line are overlapped
- (C) is an enlarged view of the intersection of the vertical and horizontal lines It is.
- (B) (C) is drawing which shows the state which coat
- (A) (B) is drawing which shows the manufacturing method of a net-like sheet.
- (A) (B) is drawing which shows the process of shaping a net-like sheet
- FIG. 1 It is explanatory drawing which contrasts the magnitude
- (A) to (H) are drawings showing the mesh shape of the net tube.
- (A) (B) is drawing which shows a test method.
- (A) (B) (C) is drawing which shows embodiment of a net-like tube. It is drawing which shows the problem of the conventional net tube.
- the sheet 1 has a net shape in which a vertical line 2 and a horizontal line 3 having an elliptical cross section are fused at an intersection point 4 and a rhomboid hole 5 surrounded by the vertical and horizontal lines 2 and 3 is provided. Since the holes 5 have a rhombus shape, the vertical line 2 is not a vertical direction parallel to the length direction (axial direction) L of the sheet 1 and the horizontal line 3 is not orthogonal to the axial direction L. Although they are inclined with respect to the axial direction L, they are referred to as a vertical line 2 and a horizontal line 3 in order to distinguish them.
- the vertical and horizontal lines 2 and 3 are made of the same single flame-retardant resin wire 10 and have an elliptical cross section as described above.
- the flame retardant resin wire 10 is a kind of non-halogen resin component selected from polypropylene, polyester, polyethylene, polyethylene terephthalate, polyamide, polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, and a mixture of two or more thereof.
- a flame retardant selected from bromine, phosphate ester, metal hydroxide and melamine is blended. The flame retardant is blended in an amount of 0.5 to 100 parts by mass with respect to 100 parts by mass of the resin component.
- a filler composed of magnesium oxide and / or calcium carbonate is blended with 100 parts by mass of the resin component as required.
- PP polypropylene
- a brominated flame retardant composed of “tetrafuromobisphenol” is used as a flame retardant.
- the vertical line 2 and the horizontal line 3 are not knitted, but as shown in FIG. 2 (B), the vertical line 2 is arranged on the upper side and the horizontal line 3 is arranged on the lower side. .
- the vertical line 2 and the horizontal line 3 having an elliptical cross section are in surface contact, and a portion of 40 to 50% of the cross-sectional area of the lower horizontal line 3 3 m is fused in such a manner that it enters the upper vertical line 2.
- Each major axis of the vertical and horizontal lines 2 and 3 is 0.35 mm to 0.5 mm, and the thickness of the net-like sheet 1 formed from the vertical and horizontal lines 2 and 3 is 0.4 to 0.8 mm.
- the length of the vertical and horizontal lines 3 surrounding the rhombic holes 5 is 1.4 ⁇ 1.4 mm in this embodiment.
- the sheet 1 has a longitudinal (axial direction) and transverse tensile strength of 15.7 N or more, a tear strength of 15.7 N or more, and a tensile elongation of 180 to 230%.
- the net-like sheet 1 is formed into a cylindrical shape by bending creases so that both ends in the width direction perpendicular to the axial direction L in the lengthwise direction are overlapped with each other, as shown in FIG.
- the sheet 1 along the longitudinal direction of the wire group W of the wire harness 20 is wound around the outer peripheral surface of the wire group W. Yes. In this state, both end sides in the width direction can be wrapped to completely cover the entire outer peripheral surface of the wire group W.
- the adhesive tape T is wound around and fixed to both ends in the length direction of the sheet 1 and the wire group W drawn from the sheet 1.
- the sheet 1 is formed by a sizing machine 30 shown in FIGS. More specifically, a flame retardant, a stabilizer, and the like are added to the resin component in the hopper 25, mixed with stirring by the hopper 25, and the mixture shown in FIG. The kneaded material is conveyed to the set 27 and formed as a net-like sheet made of the flame-retardant resin wire 10 with the die set 27.
- the die set 27 includes an out die 27a and an in die 27b.
- the out die 27a, the in die 27b, and the motor 29 rotate in the opposite directions, and an intersection (intersection) where the vertical line 2 and the horizontal line 3 overlap is formed at the portion 27c where the hole of the out die 27a and the hole of the in die 27b overlap.
- a lattice shape (in this embodiment, a rhombus) is formed by separating the holes of the die 27a and the hole of the in-die 27b.
- the vertical lines 2 and the horizontal lines 3 are heated and pressurized, and the vertical and horizontal lines 2 and 3 are welded. And, at the intersection 4 between the vertical and horizontal lines 2 and 3, since it is heated under pressure, at the intersection 4, as shown in FIG. .
- the net-like sheet 40 is conveyed to the cooling tank 31, is thermally stretched by the stretching roller 32, is stretched, and is transported to the stretching tank 33, and then the sheet 40 is wound around the coil 41.
- FIG. 5 (A) shows a manufacturing method for obtaining a standard sheet 1-A
- FIG. 5 (B) shows a manufacturing method for making a continuous sheet 1-B.
- the sheet 40 pulled out from the coil 41 is cut into a predetermined length by a sheet cutting machine (not shown), and a cut sheet 42 is provided.
- the cut sheet 42C is formed into an arc shape through the cut sheet 42C.
- a forming machine 45 having a conical cylindrical shape is used, and pulling rolls 46A and 46B are arranged upstream and downstream of the forming machine 45.
- the sheet 40 is passed from the roll 46A through the molding machine 45 and is wound in an arc shape inside the molding machine 45 so that the end portion in the width direction wraps at the final small diameter portion.
- the continuous sheet 1-B is manufactured by being pulled out by the roll 46B.
- the sheet 1-B is cut to a required length by a cutting machine 47 according to use conditions.
- the net-like sheet 1 having the above-described configuration is deformed into an elliptical cross section at the intersection 4 of the vertical and horizontal lines 2 and 3, and enters the opposing line with each other.
- it is less likely to peel compared to the case where only the outer peripheral surfaces of the vertical and horizontal lines are welded, and has the above-described tensile strength and tear strength, and no breakage occurs.
- both the vertical and horizontal lines 2 and 3 are formed from the flame-retardant resin wire 10
- the net-like sheet 1 has flame retardancy and can be used as an exterior material for a wire harness routed in an engine room.
- the vertical and horizontal lines 2 and 3 are firmly fixed to each other, the vertical and horizontal lines 2 and 3 are not frayed at the cut end. And since the sheet
- seat 1 is made into net shape, a weight can be halved compared with a round tube. In particular, when it is used as an exterior material for a large number of wire harnesses routed in an automobile, it can contribute to reducing the weight of the automobile and improve fuel efficiency.
- the net-like sheet 1 having the above-described configuration can arbitrarily change the size of the holes 5 and the shape of the holes 5 by adjusting the positions of the intersections 4 of the vertical and horizontal lines 2 and 3.
- FIG. 6 shows a coarse net N-1 with larger holes 5 and a fine net N-2 with smaller holes 5.
- the relationship between the size of the air holes 5 and the stretchability, wear resistance, and strength of the coarse net N-1 is large in stretchability but weak in wear resistance and strength.
- the fine net N-2 is less stretchable but has higher wear resistance and strength.
- the net tube 1 can be provided with the required elongation and strength by adjusting the size relationship of the air holes 5 according to the use conditions of the wire harness.
- the shape of the holes 5 can be the shapes shown in FIGS. 7 (A) to (H).
- (A) is a rectangular mesh, which is a net that is difficult to stretch.
- (B) is a rhombus-shaped mesh, which is a net that is easy to stretch.
- (C) is a hexagonal mesh and has a strength higher than (B), while the stretchability is a net slightly lower than (B).
- (D) is a circular mesh, and has a strength equal to or higher than (C), but has no stretchability.
- (E) is a rhombus-shaped mesh formed by stretching the vertical and horizontal lines 2 and 3 and has a low strength but an excellent stretchability.
- large diameter lines 2-a and 3-a and small diameter lines 2-b and 3-b are provided as vertical lines and horizontal lines, respectively, and a plurality of the small diameter lines are sandwiched between the large diameter lines.
- the net-like portion of the small diameter wire is arranged in the hole surrounded by the large diameter wire.
- the net has a strength equal to or greater than (D) and has a slight elasticity.
- G A rectangular mesh and a cellage with a solid portion NS provided at both ends in the length direction of the net tube 1 so that an adhesive tape can be easily wrapped around the wire group of the wire harness and the tip of the net tube 1. ing.
- the solid part is formed by heating and melting a resin wire, and in this state, it is immersed in a cooling bath and solidified.
- H is a rhombus-shaped mesh with cellage. In this way, the shape of the air holes 5 can be easily adjusted according to requirements, such as a net tube that is easy to stretch and a net tube that is difficult to stretch.
- Example 2 In Examples 1, 2, and 3, 4 parts by mass of a brominated flame retardant is blended with 100 parts by mass of polypropylene to provide vertical and horizontal lines, and the intersection of the vertical and horizontal lines is the vertical line as described in the above embodiment. In contrast, a horizontal line is formed by heat-sealing in a state where 40 to 50% of the cross-sectional area is inserted, and is formed of a net-like sheet having a rhombic mesh. In Examples 1, 2, and 3, the length of the side of the hole was changed as shown in Table 1 below.
- Comparative Example 1 is composed of a net tube having a rhombus-like mesh similar to the example, in which vertical and horizontal lines having a circular cross section are made of polypropylene, and the surface of the intersection is welded by line contact.
- the comparative example 2 consists of a tube whose vertical and horizontal lines are made of polyester, and whose vertical and horizontal lines are closely knitted.
- Comparative Example 3 is a vinyl chloride tape that is widely used as a tape wound around a wire harness.
- the tape wear measurement in Table 1 was measured with the test apparatus shown in FIG.
- an auxiliary weight 31 was attached to the support bar 30 and a bracket 32 was provided on the lower side.
- the bracket 32 was connected to the tip of a shaft arm 33 that was cantilevered.
- the test tape 40 was fixed to the horizontal support bar 34.
- the wear tape 36 made of 150A sandpaper was held by the support pins 35 so as to be in sliding contact with the test tape 40 and moved in the direction of the arrow.
- the amount of wear of the test tape 40 at the site where the wear tape 36 was in sliding contact was measured.
- the tear strength measurement in Table 1 is provided with a slit 41a having a length of 25 mm from the center of one side of the test tape 41 having a length and width of 50 mm, and the slit 41a is used as a boundary in the left-right direction. Measurement was performed by pulling.
- Examples 1, 2, and 3 of the present invention were excellent in flame retardancy (OI value), and in particular, Examples 2 and 3 had a target value of 23.5 or more.
- the tensile strength is about 3 to 10 times that of Comparative Example 1 where the intersections of the vertical and horizontal lines are welded by line contact, and the tear strength is larger than Comparative Example 1. there were. Further, the wear test was proved to be excellent in wear resistance at a target value of 1000 or more.
- the net-like sheet 1 is shaped into an arc shape and shaped so that both ends in the width direction wrap.
- the tube 50 may be heat-sealed.
- FIG. 9 (B) the net-like tube 50 is contracted and inserted through the wire harness 20, and after being inserted, is stretched as shown in FIG. 9 (C). It is fixed at T.
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Abstract
Description
これらのテープおよびチューブからなる外装材としては、従来、テープは塩化ビニルテープが汎用され、コルゲートチューブとしてはポリプロピレン等が用いられ、いずれも樹脂で形成されている。
さらに、実開平4-21119号等で提案されている樹脂糸からなるネットチューブも用いられている。
一方、ネットチューブは、コルゲートチューブや円筒状チューブ内の閉断面空間にワイヤハーネスを挿通する場合と比較して、ネットの空孔に電線群が露出するため保護機能は低下するが、外部干渉材と干渉する恐れが無い配索領域等には用いることができる。
さらに、従来のネットチューブは縦糸と横糸とを編んで隣接する交点と縦糸と横糸の上下を逆転してネット状に形成している。よって、交点での縦糸と横糸との結合力が弱い。該交点で縦糸と横糸とを溶着している場合もあるが、図10に示すように、縦糸100の外周面と横糸101の外周面とを線接触して溶着しているだけであるため、交点に引張力や引裂力が負荷されると、交点での剥がれ、所謂目崩れが生じて、形状保持力が低い問題がある。
前記縦線と横線とは編まずに交点で上下に重ねられ、該縦線と横線のいずれか一方または両方が、断面積の40%~50%が溶融されて相手方の繊維中に埋設された状態で互いに融着され、裁断端でほつれ止めされていることを特徴とするワイヤハーネス用のネット状保護材を提供している。
前記樹脂成分としては、加工容易性、コストの点等からポリプロピレンが最も好適に用いられる。
前記縦横線からなる本発明のネット状保護材はシートまたはチューブとし、
前記シートは巾方向の両端がラップする円筒状に曲げ癖がつけられている。
チューブとする場合は、一枚のシートの巾方向の端縁を互いに熱融着してチューブとしている。
前記空孔の形状は、要求される伸縮性および強度によって調整される。
即ち、空孔の大きさは、伸縮性の要求度が高い場合にはネットを粗くして各空孔を大きくし、強度および耐摩耗性の要求度が高い場合にはネットを細かくして各空孔を小さくしている。空孔の形状は、伸びやすくするには菱形状とされ、伸びにくくするには正方形や長方形としている。
さらに、ネット状保護材の長さ方向の両端を空孔を設けないセルベージ付きの形状として、該ネット状保護材の長さ方向の両端とワイヤハーネスの電線群とのテープ巻きを容易な形状としてもよい。
該製造方法は、前記縦線と横線とをサイジング機でネット状のシートを成形し、該成形時に加熱加圧し、縦横線の交点を加圧状態で熱融着し、
前記ネット状のシートを所要長さに裁断し、裁断されたネット状シートの巾方向の両端縁がラップして筒状になるように賦形している。
ネット状チューブとする場合は、ラップした部分を熱融着して予めチューブとしている。
さらに、ネット状としていることにより、従来の樹脂製の丸チューブと比較して1/2以下にまで軽量化することができる。
図1に示す実施形態のネット状保護材はシート1としている。該シート1は断面楕円形状とした縦線2と横線3を交点4で融着し、縦横線2、3で囲まれた菱形状の空孔5を設けたネット状としている。空孔5を菱形状としているため、縦線2はシート1の長さ方向(軸線方向)Lと平行な縦方向でないと共に横線3は軸線方向Lと直交方向ではなく、縦横線2、3とも軸線方向Lに対して傾斜方向であるが、区別するために、縦線2、横線3と称する。
詳細には、難燃性樹脂線材10は、ポリプロピレン、ポリエステル、ポリエチレン、ポリエチレンテレフタレート、ポリアミド、ポリフェニレンエーテル、ポリブチレンテレフタレート、ポリフェニレンサルファイド、これらを2種以上の混合物から選択されるノンハロゲンの樹脂成分の一種以上に、臭素系、リン酸エステル、金属水酸化物、メラミンから選択される難燃剤が配合されている。
前記樹脂成分100質量部に対して前記難燃剤が0.5~100質量部配合されている。さらに必要に応じて、酸化マグネシウムあるいは/および炭酸カルシウムからなる充填剤が前記樹脂成分100質量部に対して0~50質量部配合されている。
本実施形態では樹脂成分としてポリプロピレン(PP)を用い、難燃剤として「テトラフリモビスフェノール」からなる臭素系難燃剤を用いている。
該交点4では、図2(C)に示すように、上下の断面楕円形状の縦線2と横線3とが面接触し、かつ、下側の横線3の断面積の40~50%の部分3mを上側の縦線2中に入り込ませる状態で融着している。
また、該ネット状のシート1では菱形状の空孔5を囲む縦横線3の長さは、本実施形態では1.4×1.4mmとしている。
該シート1の縦方向(軸線方向)および横方向の引張強度は15.7N以上、引き裂き強度は15.7N以上であり、引張伸びは180~230%である。
該シート1をワイヤハーネス20に取り付ける工程では、ワイヤハーネス20の電線群Wの長さ方向に沿って縦沿えし、該状態で巻癖をつけたシート1を電線群Wの外周面に巻き付けている。この状態で、巾方向の両端側がラップして電線群Wの全外周面を完全に被覆することができる。その後、シート1の長さ方向の両端とシート1から引き出された電線群Wとに粘着テープTを巻き付けて固着している。
図4(A)(B)に示すサイジング機30でシート1を成形している。詳細には、前記樹脂成分に難燃剤、安定剤等をホッパー25に投入し、ホッパー25で撹拌混合し、該撹拌混合した混合物をスクリューコンベヤ26で混練りしながら図4(B)に示すダイセット27へ搬送し、混練物をダイセット27で難燃性樹脂線材10からなるネット状のシートとして成形している。
ついで、ネット状のシート40は冷却槽31へと搬送され、延伸ローラ32で熱延伸され、延伸後、延伸槽33へ搬送され、その後、シート40はコイル41と巻回される。
図5(A)は定尺のシート1-Aとする製造方法を示し、図5(B)に連続したシート1-Bとする製造方法を示す。
また、縦横線2、3とも難燃性樹脂線材10から形成しているため、ネット状のシート1は難燃性を備え、エンジンルームに配索するワイヤハーネスの外装材として用いることができ、かつ、縦横線2、3が互いに強固に固着されているため、各縦横線2、3が裁断端でほつれが生じることはない。しかも、シート1をネット状としているため、丸チューブと比較して重量を半減できる。特に、自動車に配索する多数本のワイヤハーネスの外装材として用いると、自動車の重量軽減にも寄与でき、燃費を向上させることができる。
図6は空孔5を大きくして粗いネットN-1と、空孔5を小さくした細かいネットN-2を示す。空孔5の大小関係と伸縮性、耐摩耗性および強度の関係は図示のように、粗いネットN-1は伸縮性は大であるが耐摩耗性および強度は弱くなる。細かいネットN-2は伸縮性は小であるが耐摩耗性および強度は強くなる。
このように、ネットチューブ1はワイヤハーネスの使用条件に応じて、空孔5の大小関係を調整して、要求される伸びと強度を備えたものとすることができる。
(A)は長方形状の網目とし、該形状とすると伸びにくいネットとしている。
(B)は菱形形状の網目とし、該形状とすると伸びやすいネットとしている。
(C)は六角形状の網目とし、(B)以上の強度を持つ一方、伸縮性は(B)より若干低下するネットとしている。
(D)は円形の網目とし、(C)以上の強度を持つ一方、伸縮性は無いものとしている。
(E)は縦横線2、3を延伸して細くした菱形形状の網目としており、強度は低いが、伸縮性に優れたものとしている。
(F)は縦線と横線としてそれぞれ大径線2-a、3-aと小径線2-b、3-bとを設け、複数本の前記小径線を前記大径線で挟んだ状態で引き揃え、大径線で囲まれた空孔に小径線のネット状部を配置している。該ネットは(D)以上の強度を備え、伸縮性も若干有するものとしている。
(G)長方形状の網目とし、かつ、ネットチューブ1の長さ方向の両端に無垢部NSを設けたセルベージ付きとし、ワイヤハーネスの電線群とネットチューブ1の先端とに粘着テープを巻き付けやすくしている。前記無垢部は樹脂線を加熱して溶融し、この状態で冷却槽に浸漬して固化することで形成している。
(H)は菱形形状の網目とし、セルベージ付きとしている。
このように、空孔5の形状を、伸びやすいネットチューブ、伸びにくいネットチューブと要求に応じて容易に調整することができる。
実施例1、2、3は、ポリプロピレン100質量部に対して臭素系難燃剤を4質量部配合して、縦横線を設け、該縦横線の交点を前記実施形態に記載のように、縦線に対して横線を断面積の40~50%を入り込ませた状態で熱融着して成形し、菱形状の網目を有するネット状のシートからなる。
実施例1、2、3は空孔の辺の長さを下記の表1に示すように変えた。
比較例1は、断面円形の縦横線がポリプロピレン製で、交点の表面が線接触で溶着され、実施例と同様の菱形状の網目としたネットチューブからなる。
比較例2は、縦横線がポリエステル製で、縦横線が密に編成されたチューブからなる。
比較例3は、ワイヤハーネスに巻き付けるテープとして汎用されている塩化ビニルテープである。
試験装置は支持棒30に補助錘31を取り付けると共に下側にブラケット32を設け、該ブラケット32を片持ち支持された軸アーム33の先端に連結した。試験用テープ40を水平支持棒34に固定した。この状態で、150Aサンドペーパからなる摩耗テープ36を支持ピン35で試験用テープ40に摺接するように保持して矢印方向に移動させた。摩耗テープ36が摺接された部位の試験用テープ40の摩耗量を測定した。
また、実施例1、2、3は比較例1の縦横線の交点を線接触で溶着した場合と比較して引張強度が3倍~10倍程度であり、引き裂き強度も比較例1より大であった。さらに摩耗試験も目標値の1000以上で耐摩耗性に優れていることが立証された。
このネット状のチューブ50は図9(B)に示すように、収縮させてワイヤハーネス20を挿通し、挿通後に図9(C)に示すように引き伸ばして、ワイヤハーネス20の電線群と粘着テープTで固着している。
2 縦線
3 横線
4 交点
5 空孔
50 ネット状のチューブ
Claims (8)
- 断面楕円形状の難燃性樹脂線材からなる縦線と横線との交点が加圧熱融着されてネット状としており、
前記縦線と横線とは編まずに交点で上下に重ねられ、該縦線と横線のいずれか一方または両方が、断面積の40%~50%が溶融されて相手方の繊維中に埋設された状態で互いに融着され、裁断端でほつれ止めされていることを特徴とするワイヤハーネス用のネット状保護材。 - 前記難燃性樹脂線材は、ポリプロピレン、ポリエステル、ポリエチレン、ポリエチレンテレフタレート、ポリアミド、ポリフェニレンエーテル、ポリブチレンテレフタレート、ポリフェニレンサルファイド、これらを2種以上の混合物から選択されるノンハロゲンの樹脂成分の一種以上に、臭素系、リン酸エステル、金属水酸化物、メラミンから選択される難燃剤が配合されている請求項1に記載のワイヤハーネス用のネット状保護材。
- 前記難燃性樹脂線材は、前記樹脂成分100質量部に対して前記難燃剤が0.5~100質量部配合され、さらに、酸化マグネシウムあるいは/および炭酸カルシウムからなる充填剤が前記樹脂成分100質量部に対して0~50質量部配合されている請求項2に記載のワイヤハーネス用のネット状保護材。
- 前記断面楕円形状の縦横線の長径が0.35mm~0.5mm、ネット状のシートの厚みを0.4~0.8mmとした時、縦横引張強度が15.7N以上、引き裂き強度15.7N以上、伸びが150%以上とされている請求項1乃至請求項3のいずれか1項に記載のワイヤハーネス用のネット状保護材。
- 前記縦線と横線とで囲まれる各空孔の形状は、正方形、長方形、ひし形、六角形、あるいは真円、楕円、長円のいずれかの円形とされている請求項1乃至請求項4のいずれか1項に記載のワイヤハーネス用のネット状保護材。
- 前記ネット状保護材はチューブまたはシートからなり、
前記シートは巾方向の両端がラップする円筒状に曲げ癖がつけられており、また、
前記チューブは一枚のシートの巾方向の端縁を互いに熱融着してチューブとしている請求項1乃至請求項5のいずれか1項に記載のワイヤハーネス用のネット状保護材。 - 請求項1乃至請求項6のいずれか1項に記載のネット状保護材の製造方法であって、
前記縦線と横線とをサイジング機でネット状のシートを成形し、該成形時に加熱加圧し、縦横線の交点を加圧状態で熱融着し、
前記ネット状のシートを所要長さに裁断し、裁断されたネット状シートの巾方向の両端縁がラップして筒状になるように賦形していることを特徴とするワイヤハーネス用のネット状保護材の製造方法。 - 請求項1乃至請求項6のいずれか1項に記載のネット状保護材を、ワイヤハーネスの電線群の外周に巻き付け、長さ方向の両端に粘着テープを巻き付けて電線群と固着しているワイヤハーネスのネット状保護材の取付方法。
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| CN2884630Y (zh) * | 2005-12-09 | 2007-03-28 | 深圳市宝安区龙华振恺五金加工店 | 开合式可伸缩编织网管 |
| JP5174366B2 (ja) * | 2007-03-28 | 2013-04-03 | 矢崎総業株式会社 | 電線保護材及びワイヤーハーネス |
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2008
- 2008-12-22 JP JP2008326386A patent/JP2010148335A/ja not_active Abandoned
-
2009
- 2009-11-18 EP EP20090834658 patent/EP2362507B1/en not_active Not-in-force
- 2009-11-18 CN CN2009801491737A patent/CN102239615A/zh active Pending
- 2009-11-18 KR KR1020117009272A patent/KR20110076959A/ko not_active Ceased
- 2009-11-18 WO PCT/JP2009/069552 patent/WO2010073854A1/ja not_active Ceased
- 2009-11-18 US US13/128,985 patent/US20110236614A1/en not_active Abandoned
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012014548A1 (ja) * | 2010-07-28 | 2012-02-02 | 住友電装株式会社 | ワイヤハーネス用のネット状保護材および製造方法 |
| JP2012033293A (ja) * | 2010-07-28 | 2012-02-16 | Sumitomo Wiring Syst Ltd | ワイヤハーネス用のネット状保護材および製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2362507B1 (en) | 2013-09-18 |
| EP2362507A1 (en) | 2011-08-31 |
| JP2010148335A (ja) | 2010-07-01 |
| EP2362507A4 (en) | 2012-04-25 |
| US20110236614A1 (en) | 2011-09-29 |
| KR20110076959A (ko) | 2011-07-06 |
| CN102239615A (zh) | 2011-11-09 |
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