CN1185235A - Side-entry enclosure for electrical wiring joints - Google Patents

Abstract

Wraparound side-entry enclosure for joints in primary electrical wiring, especially for high-speed automotive installation, uses heat-shrinkable fabric with adhesive lining, which fabric is fastened around the wiring joint by fabric-piercing fasteners such as staples, rivets, or cable ties. The fabric either has a shrink ratio of less than 50 %, or has a higher shrink ratio and is wrapped loosely enough to limit residual unresolved shrinkage (after shrinking around the joint) to less than 50 %.

Description

The side that is used for power lug enters wrapper

The present invention relates to be used for the protectiveness wrapper that side that basic electric wire connects enters (side-entry).

The method of existing protection power lug is tightly to overlap a heat-shrinkable plastic tube thereon, and more better have a heat activated adhesion internal layer.But such pipe must just can put by a dead end of electric wire, may be inconvenient practical.

Produce a kind ofly can be used for basic power lug, being fit to commercial side, to enter heat-shrinkable wrapper be a long-standing problem, this wrapper can need not cut off that electric wire produces dead end and the middle part that can laterally be used for electric wire.Owing to lack the economical and practical fastener can bear thermal shrinkage force, twining around joint that heat-shrinkable plastic layer has been proved can not be satisfactory.Adhere to securing member and in contraction process, launch easily, and also be unpractical using the suitable heavy packaging system under extensive cable joint situation as GB-A-2134334 described in the small-scale relatively power lug.

The invention provides the basic electric wire wrapper that a kind of shockingly simple side enters, even must drop in the industry of minimum production in enormous quantities electric wire and all suit to provide result technical and that can both accept economically resembling such set-up time of automation electric wire assembly line and expense.

The protectiveness wrapper that the present invention correspondingly provides a side that is used for basic power lug to enter, comprise a heat-shrinkable textile article, also use the fastener that penetrates fabric fastening around being wrapped in joint, this textile article has on the direction of wound joint and is no more than 50% circumference percent thermal shrinkage, or it is entangled on the joint by enough loose grounds, the remaining shrinkage in back is not enough to damage textile article on the joint so that it tightly is retracted to, and preferably is no more than 50%; And the horizontal percent thermal shrinkage of this textile article (on the tangential direction around direction) is lower than circumference percent thermal shrinkage half (be preferably lower than 1/3, preferred be no more than 20%).

Percent thermal shrinkage accounts for the percentage of the length after the abundant contraction for the loss of length who shrinks, mainly by the degree of drawing decision that affacts collapsible fiber.

For the basic electric wire wrapper of common scale, preferred circumference percent thermal shrinkage or delayed heat shrinkage are lower than 40% textile article, preferably are no more than 33%, more preferably are no more than 25%.Usually also preferred circumference percent thermal shrinkage is at least 10% textile article, preferably is at least 20%.To such an extent as to remaining shrinkage is no more than 50% after be retracted to power lug at it if textile article is entangled in around the power lug by enough loose grounds, then the circumference percent thermal shrinkage is higher than 50% (as 100% or 200%) and also can.

When textile article has the predetermined circumference shrinkage, be surprised to find that and resemble the locking wire nail, be preferably one or more staples (staple) or rivet (rivet), such as plastic rivet, such fastener that penetrates textile article easy to use can be used for fabric is fastened in the power lug can not torn in thermal contraction process subsequently.Under the situation of tightly twining, shrinkage is preferably lower than 40% or higher contraction (recovery) rate according to the suitable extensive Fabric composites of advising among the GB-A-2134334 mentioned above, and this composite material may also require to regulate fabric edge and be used to bear tearing of the closed shape that penetrates fiber to form closed shape or to strengthen body.The plastic ca-ble button can pass on the textile article form (as punching) thus the hole and with the another kind of fastener of known technology chucking formation textile article.The fastener of appropriate format, rivet for example, a sideband that can be inserted into textile article in advance is wound into after the power lug fastening easily in order to it.

The low relatively cross-direction shrinkage that is appreciated that the textile article that the present invention uses is more conducive to control the amount of contraction of shell along the electric wire direction of encapsulation when allowing effective circumference to shrink.Correspondingly She Ji maximum transversal shrinkage is preferably lower than 17% for being lower than 25%, more preferably is no more than 10%, and is generally speaking low more good more.

Shrinkage is lower than 50% o'clock textile article and can be fastened on tightly around the joint, such as just be close to joint or electric wire before the textile article thermal contraction.May wish under some environment to twine so tightly, insert the fastener penetrate fabric but twining to have to be beneficial to certain gas porosity in the reality.Common like this any danger of being convenient to fastening operation and can reducing fastener accidental injury wire insulator.Therefore, the suggestion fastener part of passing textile article is separated the distance (preferably being not more than the twice average diameter) that reaches the average diameter that is the maximum cross section (comprising any insulating barrier) that is three times in electric wire in the wrapper to the maximum with joint or the hithermost part of electric wire.

Textile article can be made with other fiber of describing among heat-shrinkable fiber and the GB-A-2134334 mentioned above, but preferably ignores the mylar lamination of wherein said second plastic laminate and plating.For example, fabric can be with the crosslinked high density polyethylene (HDPE) meridional fibers of contractile diameter 0.2～0.3mm with 35.4 every centimetre (90 of per inch) and 3 * 68g/km glass or 0.1mm pentaerythrite ultimate fibre parallel with 10 of 3.9 every centimetre 9 per inch) the flat sennit fabric (one on the other) that constitutes.Parallel fiber will be spaced in case not with the effect of contraction of meridional fibers to unacceptable degree.

Following table has shown interchangeable Fabric Design.

Fabric constitutes

	Warp props up/centimetre (/ inch)	Through linear diameter or line density and material	Parallel root/centimetre (root/inch)	Parallel diameter or line density and material	Braided design
						??#1	????15.7(40)	The fibrillation bar 200g/cm that high density polyethylene (HDPE) forms	???4.7(12)	Ryton (trade mark) polyphenylene sulfide 0.2mm	????2/2 ???HOPSAK
??#2	????27.6(70)	Polyvinylidene fluoride ultimate fibre 0.35mm	???3.1(8)	Pentaerythrite ultimate fibre 0.1mm	????2/2 ??BROKENTWI
						??#3	????35.4(90)	High density polyethylene (HDPE) ultimate fibre 0.25mm	???3.5(9)	E glass fibre 2 * 68g/cm	Flat sennit
??#4	????47.2(120)	Low density polyethylene (LDPE) ultimate fibre 0.3mm	???4.7(12)	Hoe Chst Trevira (trade mark) type 711 multiple polyester 110g/cm	Warp Interchan double braid

The fabric product preferably comprise the polymeric material of adhesion, preferably a kind of polymeric membrane lamination (preferably polyethylene film) that makes the fabric product become basic atresia.For example, the low density polyethylene films that about 0.2mm is thick can add the one side that technology is laminated to woven article with existing layer.After laminating, the most handy common method of film and fabric shines at least 10, and preferably at least 12, at least 14 Megarad dosage distinguishingly laminate the temperature performance of product and bond together with enhancing.Suitable irradiation means and equipment such as electron beam are well-known.Had better not use the dosage that surpasses 20 Megarads, dosage can obtain a small amount of additional benefit more than 15 Megarads.Employing is included in the method described in the EP-A-0324630, and the fabric product can become and prevent the infiltration of liquid on the piece of cloth plane, is commonly referred to make article " plane tight (Planartight) ".

Under many situations, but thereby the suggestion wrapper also comprises can the flow encapsulant of sealed package device of many hot activations when the thermal contraction of fabric product is to joint.Such encapsulant can provide separately, but it is better as adhesion layer to be attached to fabric product inner surface.The suitable seal material is well-known, and hot melt is adhering better such as ethylene/vinyl base acetic acid copolymer or polyamide.The selection of sealing fusing or softening point will be fit to the temperature that stands in the fabric product thermal contraction process wrapper.Preferred encapsulant is the mixture of polyamide and acrylate copolymer.Sealing preferably selects can keep sealing (forming in the thermal contraction process when fabric product use) when wrapper is exposed to more than 125 ℃ after thermal contraction.For this purpose, preferably encapsulant can solidify behind mobile sealed package device, so that opposing more than 125 ℃, is further flowed when preferably being displaced to more than 150 ℃.

Example to the useful adhesive of this paper purpose is described in International Application PCT/GB95/00731 of the wo-A-8707755 (RK310) and the same period (B247).Thermocoagulation adhesive, for example coming in handy described in GB-A-2104800 (RK149) and the EP-A-0157478 (RK232).Quote the content that is disclosed and be included in here as a reference for above-mentioned four.

Preferably logical (Conducted) of the fastener of textile article around the power lug, so that the sideband that above-mentioned fastener is relative with this textile article tightens together, and can arrange each above-mentioned sideband (preferably folding contiguous corresponding edge) thus make each penetrating component of fastener penetrate each sideband at least twice.Two like this breakthrough process have strengthened the fastening area ability that opposing is torn when fabric shrink subsequently.Found if one of above-mentioned sideband folding and fastening make it dead end inwardly reach joint and electric wire is especially useful from fastener.The inner extending end of fabric when the fabric thermal contraction easily crooked and between joint and electric wire and fastener buffering area of formation, thereby help to keep fastener to avoid joint and electric wire.This point is especially favourable when the metal fastener of use resemble the staple.When two sidebands of textile article were all inwardly folding, they can make two dead ends all inwardly stretch and the butt joint of formation that connects together as described above.But, preferably make one of folding sideband encase another and form a staggered joint, and the dead end of a sideband to stay wrapper outer and reach outside the fastener.Desirable sideband is folding can original position to carry out after fabric strip being twined on the node, forms four layers protuberance fold by the limit of pressing the fabric overlapping.In addition, also can provide the textile article that folds sideband in advance, best two sidebands are inside surface laps when fabric strip is used in the sealer all.Folding sideband had better not be attached on the contiguous part of fabric strip, particularly when adhering to the fastening arrangement of the sideband that can influence plan like this.Useful sideband is folding, fixing or semifixed, be with less than 180 ° angle, the angle of preferably same fabric strip (when keeping flat) other parts is between 90 ° to 180 °, and the folding of this form can carry out across contractile warp by parallel being used as fold line.

Warp or parallel fiber can be used as main high shrinkage, twine in order to being retracted to around the joint with circumferencial direction, and the less horizontal main high shrinkage of another kind of fiber (playing by ear warp or parallel) of shrinkage are placed.Under a lot of situations, this means that the less warp of shrinkage (or parallel) fiber generally is the direction along the electric wire of turnover wrapper.

In the wrapper form of some recommendation, electric wire passes wrapper basically as the crow flies and extends, and fastener penetrates textile article so that fabric strip is entirely fastening along electric wire along electric wire with 2 points (preferably at least 3 points, at least 4 points better) at interval.Joint on a simple line is that a line advances line of wrapper and goes out the wrapper, and may be a line that enters in the wrapper joins with two or three lines of going out, and preferably make line is placement at least in wrapper with being essentially parallel to each other.The different directions of any branch of electric wire preferably appears at outside the wrapper, still, such as when the fabric that penetrates with suitable fastener between the branch wire " leg ", the branch of different directions can be arranged in wrapper.Fastener all is arranged as point-blank parallel with electric wire substantially usually, settles but also have other, for example may radially export in become the joint of three or more outlets by a lambda line and settles.

The form that is used for preferred fastener of the present invention is one or more staples (staple) or rivet (rivet) (10mm * 10mm * 10mm particularly, thick about 1mm), usually make (having an electricity isolated layer) with metal, but also may make with plastics or other suitable material.

For the target of practicality, the size of power lug be generally can be packaged into textile article (placing) width along electric wire 25 in 50mm, preferably in 30 to 40mm the wrapper.Usually, the width of best textile article enough covers the insulator outside the conductive contact.

For the efficient of using, fabric the most handy finally fastening completely two staples that vertically are in alignment with each other along the electric wire direction are finished, and preferably are spacedly distributed between the end points of two staples and wrapper.

The present invention comprises the wrapper of thermal contraction aftercrimp on joint naturally.

In addition, the present invention includes part and be used to make the instrument of wrapper, comprise suitable textile article and suitable fastening, and with the method for fastener fastening web bar.

Very amazing, according to the wrapper of thermal contraction of the present invention can be by the test of a strictness in the wrapper no bubble produce, in the test, wrapper is placed under water, the air pressure that the insulating material pipe continuous action 0.5 that carries by electric wire clings to reached for 60 seconds.

Embodiments of the invention are described with reference to the accompanying drawings by way of example, wherein:

Figure 1A, 1B and 1C show the folding device of comparison of the textile article of corresponding wrapper of the present invention with the side diagrammatic sketch;

Fig. 2 A and 2B are with preferred folding layout and a kind of constructive method of side diagrammatic sketch demonstration according to wrapper of the present invention;

Fig. 3 shows a stage of the wrapper assembling that relevant electric wire connects according to the present invention with perspective fashion;

Fig. 4 shows another stage of wrapper assembling shown in Figure 3;

Fig. 5 shows with staple Fig. 3 and fabric strip shown in Figure 4 is fastened on around the power lug;

Fig. 6 illustrates the situation of wrapper in the sub-power lug of textile article thermal contraction aftercrimp of encapsulation shown in Figure 5;

Fig. 7 shows the power lug of being with branch, has adopted a staple fastener between two legs of branch;

Fig. 8 A and the known plastic ca-ble of 8B signal are buckled in the sectional view of folding condition;

The wrapper that assembles that Fig. 9 A and 9B signal are reinforced with similar cable button shown in Figure 8.

With reference to Figure 1A, foregoing piece of cloth 10 is wrapped on the electric wire 12, and insulating barrier 14 enters the joint connector 16 of any appropriate format.The limit end 17 and 18 of piece of cloth is outwards folded, and passes common quadruple cloth with a fastener 19 and reinforce in butt joint, and wherein each folded sideband is two-layer.Figure 1B is similar, and sideband 17 is outwards folded, and sideband 18 is inwardly folded and covered on the folded end 17.Fig. 1 C shows that similarly limit end 17 and 18 all inwardly folds and is nailed together with butt joint.The disadvantage of the scheme of Figure 1A and 1B is that the outside dead end of fabric strip fails to constitute a buffering area facing to electric wire.Two inside dead ends shown in Fig. 1 C constitute aforesaid buffering area easily, but the butt joint that the result adopts engages easier leakage with respect to overlapping.

Preferred overlapping joint is shown in Fig. 2 A, and wherein limit end 27 is all inside folding as Fig. 1 C with 28, but limit end 28 covers on the limit end 27, has so just constituted above-mentioned buffering area.Fig. 2 B has shown a kind of method that forms this preferred version, at first fabric strip is entangled on the joint, and limit end 27 and 28 is overlapped, and draws the sideband that overlaps then in and forms as folding (fold line) in Fig. 2 A scheme.

Fig. 3 shows the preferred fabric sheet 30 that partly twines on the connector 3b, and its limit end 32 and 34 is inwardly folding in advance, and connector 3b is at single lambda line 37 and two outlet 38 and joint of 39 formations.The form of connector 36 is unimportant.Welding or hinge joint wire terminal can, any connector that does not have a shell, crooked or other be with or without insulating layer connector and can suitably use.

Similar Fig. 2 is described for piece of cloth in Fig. 4 displayed map 3, form overlapping around joint, Fig. 5 show with staple 50 pass piece of cloth the overlapping limit and tightly because of wrapper, line 52 (the collapsible meridional fibers of wound joint) and 54 (substantially with the parallel glass parallel fiber of electric wire) is illustrated as the textile of piece of cloth.

Fig. 6 illustrates after the fabric shrink tightly to form around joint and electric wire the final wrapper of a desirable low profile, and wherein staple 50 relies on the buffering end 34 of fabrics keeping the distance of an expectation with electric wire and joint.

Fig. 7 illustrates single line 70 and branch line to 72 branch joint, and wherein except the staple 76 of fastening encapsulation, staple 74 has passed the textile article 73 of 72 of the branch lines that separate again.

Fig. 8 A and 8B illustrate a kind of known plastic ca-ble button, it has a tooth bar 80 (seeing Fig. 8 B) that can be wrapped on the object that will tie and can insert pedestal 82, have in the pedestal one flexibly tooth button 84 embed stripping forks 86 and make the tooth bar end fixing present in, so just button is fastened on the above-mentioned object.The outstanding end 88 (seeing Fig. 8 B) of tooth bar can be pruned and remove (seeing Fig. 9 B).

Fig. 9 A and 9B signal is according to the present invention, and cable button 90 is passed in the hole beaten on the fabric body 94 92 textile article fixedly is fastened in the power lug.The part (88 among Fig. 8 B) that profile is given prominence to is by trimmed.

Claims (23)

1. the side that is used for basic power lug enters (side-entry) protectiveness wrapper, comprise and being wrapped on the joint also with the fastening heat-shrinkable textile article of fastener that passes fabric, textile article or on the wound joint direction, have and be no more than 50% circumference percent thermal shrinkage, or twined by loose ground that the remaining shrinkage in back is unlikely the damage textile article on the joint so that it tightly is retracted to, preferably be no more than 50%; Textile article also has the lateral shrinkage (around the tangential direction of direction) of the circumference of being lower than percent thermal shrinkage half (be preferably lower than 1/3, more preferably be no more than 20%).

2. according to the wrapper of claim 1, wherein the fastener part of passing textile article is separated the distance (preferably being not more than the twice average diameter) that reaches the average diameter that is the maximum cross section (comprising any insulating barrier) that is three times in electric wire in the wrapper to the maximum with joint or the hithermost part of electric wire.

3. according to the wrapper of claim 1 or 2, wherein textile article comprises the adhesiveness polymeric material, adhesiveness polymeric membrane lamination (preferably polyethylene film) preferably, and it can make the basic atresia of textile article.

4. according to the wrapper of claim 3, wherein the laminated fabric goods are preferably at least 12 Megarads with dosage at least 10 Megarads, and more preferably the ion width of cloth of at least 14 Megarads is penetrated treatment with irradiation.

5. according to the wrapper of above-mentioned arbitrary claim, comprising in a large number can heat activated encapsulant, can flow and the sealed package device when the textile article thermal contraction is to joint.

6. according to the wrapper of claim 5, wherein encapsulant is carried at the inner surface of textile article as adhesion layer.

7. according to the wrapper of claim 5 or 6, wherein encapsulant is that thermofusible is attached, the mixture of polyamide and acrylate copolymer preferably, being sealed in after the contraction of forming when the textile article thermal contraction when being exposed to temperature following time of 125 ℃, wrapper still remained valid, and still effective when preferably being exposed to 150 ℃.

8. according to claim 5,6 or 7 wrapper, wherein encapsulant can solidify behind mobile sealed package device, so that opposing is more than 125 ℃, and best further flowing to more than 150 ℃ the time.

9. according to the wrapper of above-mentioned arbitrary claim, the limit that wherein said textile article is relative tightens together with described fastener, and the part of arranging one of them sideband (preferably being folded to respective end) to make fastener penetrate is at least passed a sideband at least twice at least.

10. according to the wrapper of claim 9, one of wherein said sideband is folded and is fastening, make it dead end inwardly by fastener towards joint and electric wire projection.

11. according to the wrapper of claim 10, one of wherein said sideband is encased by another side, the dead end of another side is stayed outside the wrapper and is extended to outside the fastener.

12. wrapper according to aforementioned arbitrary claim, wherein electric wire passes wrapper substantially as the crow flies, fastener passes fabric along the electric wire direction with the distance of 2 points (preferably at least 3 points, more preferably at least 4 points) at least at interval, so that be firmly fastened to whole fabric strip along electric wire.

13. wrapper according to aforementioned arbitrary claim.Wherein fastener is one or more staples or rivet.

14. according to the wrapper of aforementioned arbitrary claim, wherein the width of textile article (placing along electric wire) arrives in the 60mm scope best 35 to 50mm 25.

15. according to the wrapper of aforementioned arbitrary claim, wherein textile article uses two or three staples that are in alignment with each other along the wire length direction to be firmly fastened to, and preferably each staple each other and the limit end of wrapper at interval suitable substantially along the electric wire direction.

16. according to the wrapper of aforementioned arbitrary claim, wherein textile article has and is lower than 40% circumference percent thermal shrinkage, preferably is no more than 33%, more preferably is no more than 25%.

17. according to the wrapper of arbitrary claim in the claim 1 to 15, wherein textile article has the circumference shrinkage greater than 50%, is preferably more than 100%, more preferably greater than 180% to 220%, and loose according to claim 1 loose ground twines.

18. according to the wrapper of aforementioned arbitrary claim, wherein textile article has at least 10% circumference percent thermal shrinkage, and preferably at least 20%.

19. according to the wrapper of aforementioned arbitrary claim, its by thermal contraction tightly to joint.

20. be applicable to the textile article of making according to the wrapper of aforementioned arbitrary claim, the one side of sideband towards fabric strip towards wrapper inside that it one or two is relative is folding.

21. be suitable for making textile article, on a sideband, install in advance and put described fastener and use in order to the another side that is fastened to textile article according to the wrapper of arbitrary claim of claim 1 to 19.

22. be suitable for making one group of part instrument, comprise suitable textile article and fastener, and optionally comprise and be used for operating the device that makes fastener fastening web bar according to the wrapper of arbitrary claim in the claim 1 to 19.

23. a method that constitutes the described wrapper of claim 19 comprises:

(a) textile article with described certain-length twines on the described joint;

(b) with the described fastener that penetrates fabric textile article is fastened on the joint;

(c) with textile article tightly thermal contraction to joint.

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