CN1329223A

CN1329223A - Flexible hose

Info

Publication number: CN1329223A
Application number: CN01121090A
Authority: CN
Inventors: 福井弘毅; 栗本勋; 西江泉; 中西俊博; 佐藤胜; 坂口正英; 大挂昌彦
Original assignee: Totaku Industries Inc
Current assignee: Totaku Industries Inc
Priority date: 2000-06-16
Filing date: 2001-06-18
Publication date: 2002-01-02
Anticipated expiration: 2021-06-18
Also published as: KR20010113495A; AU5196101A; JP2002005347A; AU782989B2; CN1214203C; ES2197757B2; ES2197757A1

Abstract

The flexible hose comprises urethane system resin-coated steel wires 3 spirally wound at given spacings, and a tube wall 5 formed when a thin-film urethane system resin band material 5a is spirally wound on the periphery of the urethane system resin-coated steel wires 3 and superposed surfaces are fused or bonded together. The urethane system resin-coated steel wires 3 and the urethane system resin tube wall 5 are bonded together with a urethane system adhesive 6. Small-width bands 4a of a urethane system resin higher in hardness than the tube wall-forming urethane system resin band material 5a is spirally wound on the periphery of the coated steel wires 3 on the tube wall 5 to provide a double coating. The small-width bands 4a are integrally fused onto the tube wall 5 or integrally bonded thereto via the urethane system adhesive 6.

Description

Flexible hose

The present invention relates to a kind of flexible hose of making by synthetic resin.Particularly, the present invention relates to a kind of flexible hose that is suitably used as general electric household dust collector hose (dust collector hose).

In the prior art, this flexible hose, for example the flexible pipe on the vacuum cleaner generally includes the steel wire of a band coating and the lead of a band coating, the steel wire of band coating is a kind of hard wire that is coated with PVC (PVC) resin, and the lead of band coating is the multiply copper conductor that is coated with the polyvinyl chloride resin of insulation.The steel wire of band coating and the lead of band coating arrange with appropriate form and with a predetermined pitch in the shape of a spiral shape reel.A kind of strip material of being made by polyvinyl chloride resin circumference outside the lead of the steel wire of band coating and band coating twines with helical.The overlapped surfaces of strip material is fused or is bonded together, to form tube wall.In addition, the lead of the steel wire of tube wall, band coating and band coating is also fused or is bonded together.As mentioned above, in the conventional cleaners flexible pipe that adopts reinforcement metal line (for example steel wire of band coating), polyvinyl chloride resin generally is used as the coating resin of coated steel wire, the resin material of the coating resin of band coating lead and formation tube wall.

But when discarded flexible pipe resembles common rubbish when burned, this flexible pipe that contains polyvinyl chloride resin will produce dioxin and other harmful material.How removing above-mentioned harmful matter is a great social concern.In addition, because the polyvinyl chloride resin that is included in the flexible pipe as resin material has bigger proportion, be used to keep the hard wire of flexible pipe shape and the copper conductor that is used to conduct electricity but also adopted, so the gross weight of flexible pipe is very big.As a result, bigger gross weight will make the user can feel exhausted behind this flexible pipe of long-time use.In addition, also improper from this flexible pipe of cost.

Therefore, the applicant has proposed a kind of flexible pipe that does not contain PVC, as shown in Figure 9, and with regard to this flexible pipe application patent (referring to the clear 9-39971 of Japanese patent unexamined open file).In this flexible pipe, the resin material that forms tube wall is that the copolymer resin (EVA) by not chloride ethane-acetic acid ethyenyl constitutes.

The flexible pipe of making according to the existing patent application of this piece is keeping the flexible pipe vpg connection to preponderate than traditional polyvinyl chloride resin flexible pipe, but also lighter than the gross weight of conventional P VC resin hose.Can affirm that this flexible pipe has the advantage that is highly susceptible to operating, the user does not just have exhausted sensation behind this flexible pipe of long-time use like this.But if in use have enough flexibilities and flexible tube wall, its wear resistance is relatively poor again.Can affirm: the abrasive forces on the outer surface part of reinforcement metal silk is especially big, and is difficult to provide a kind of long-time product that uses that is fit to.In order to realize having produced and then tested repeatedly various flexible pipes by strengthening the purpose that methods such as wall thickness, use high hardness material improve wear resistance.But can affirm: because flexible and flexibility has reduced or because this flexible pipe weight is big, above-mentioned flexible pipe is not suitable for long-time use.

Therefore, the present invention is intended to address these problems.The flexible pipe that the material that one object of the present invention is to provide a kind of employing not contain polyvinyl chloride resin is made, this flexible pipe uses the material that does not contain polyvinyl chloride resin, even and also can not produce dioxin when burning.Another object of the present invention is to provides a kind of flexible pipe with following advantage: have the performance of good maintenance flexible pipe shape, gross weight is light, and is highly susceptible to operation, thereby can not make the user after long-time the use used-up sensation be arranged.In addition, a further object of the present invention be to provide a kind of viscosity is little, wear resistance is enough good and with the foregoing invention purpose in the flexible pipe of advantage coexistence.

Referring now to part reference character in the accompanying drawing and symbol the device of realizing above-mentioned purpose is made an explanation, wherein in the accompanying drawing embodiments of the invention have been shown.Flexible hose of the present invention comprises: with the pre-constant pitch steel wire (3) of the shape band polyurethane resin coating of twining in the shape of a spiral; The polyurethane resin tube wall (5) that constitutes by the polyurethane resin stripping (5a) of film shape, wherein film shape polyurethane resin stripping curl is wound on outside the steel wire (3) of band polyurethane resin coating on the circumferential surface, and the overlapped surfaces of polyurethane resin stripping (5a) is fused or is bonded together, the tube wall of polyurethane resin (5) is fused or is bonded on the steel wire (3) of described band polyurethane resin coating, a polyurethane resin arrowband (4a) curl is wound on outside the polyurethane resin tube wall (5) of circumferential surface outside the steel wire (3) that covers described band polyurethane resin coating on the surface portion, thereby the steel wire (3) of secondary cover tape polyurethane resin coating, arrowband (4a) is fused to described tube wall (5) by one and goes up or bond on the described tube wall by urethane adhesive (6) one, and the hardness of polyurethane resin arrowband (4a) is greater than the hardness of polyurethane resin stripping (5a).

Fig. 1 is a front elevation, for first embodiment is described, partly shows the inside of a dust collector hose among the figure;

Fig. 2 is the sectional view of amplification of the tube wall of dust collector hose;

Fig. 3 is the view sub-anatomy that is used to illustrate processing device;

Fig. 4 is the local abridged front elevation of dust collector hose;

Fig. 5 is used for view before the flexible pipe on the vacuum cleaner;

Fig. 6 is a front elevation, for describing second embodiment, partly shows the inside of a dust collector hose among the figure;

Fig. 7 is the sectional view of amplification of the tube wall of dust collector hose shown in Figure 6;

Fig. 8 is the view sub-anatomy that is used for illustrating second embodiment's processing device;

Fig. 9 is a front elevation, for a flexible pipe of the prior art is described, partly shows the inside of dust collector hose among the figure.

The present invention has said structure.Implementing when of the present invention, the steel wire 3 of four band coatings can be set, thereby providing two circuit for flexible pipe; The steel wire 3 of two band coatings also can be set, thereby provide a circuit for flexible pipe.Perhaps, the steel wire 3 of three band coatings can be set also, thereby provide a circuit and a ground wire for flexible pipe.According to circumstances, this flexible pipe can only be provided with the steel wire of a band coating, is used to keep the shape of flexible pipe, for example keeps the shape of vertical type dust collector flexible pipe.In addition, the hard wire 1 of use itself can be a undressed wire rod.But when using the hard wire of copper coating, it has following advantage: not only can improve electric conductivity, but also can easily it be welded on another root lead or the electrical connector.

In addition, the polyurethane resin stripping 5a that forms tube wall 5 is that resin in 45 to 85 scopes is made by the A level hardness (being referred to as JIS A level hardness hereinafter) that detects by JIS.Fillet band 4a is that resin in the 70-99 scope is made by JIS A level hardness, and in other words, fillet band 4a is made greater than the material of the hardness of resin streak carrying material 5a by hardness.In addition, for the viewpoint that is easy to make flexible pipe H, preferably by two kinds of

material

4a, 5a constitutes flexible pipe H like this: two coatings of the arrowband 4a of the stripping 5 of formation tube wall 5 major components and covering coated steel wire 3 outer surfaces are pressed into a kind of material by the method for while extrusion moulding.But, these two kinds of stripping 5a and 4a also can by two kinds respectively from a plurality of resin extruded moulds the stripping of extrusion moulding constitute.

Now in conjunction with the accompanying drawings embodiments of the invention are illustrated.In the accompanying drawings, Fig. 1 to 3 is the schematic representation of the flexible hose of first embodiment of the invention.Fig. 1 is an external view, and the part of flexible pipe H is broken away in the drawings; Fig. 2 is the amplification view of tube wall; Fig. 3 is the decomposing schematic representation that is used to illustrate the device of making flexible pipe.

Have following structure at the flexible pipe H shown in first embodiment: the steel wire 3 of four band coatings is intervally installed with a given distance.The steel wire 3 of band coating forms by insulation coating high hardness resin on the Medium Hard Steel silk 1, and wherein high hardness resin can for example be that Shore D level hardness is 68 polyurethane resin material 2.The wire material of available another kind of high hardness, for example alternative hard wire (High Tensile Steel Wire) such as Stainless Steel Wire 1. in addition, in the present embodiment, the surface of hard wire is subjected to copper facing or bronzing is handled.Promptly in the flexible pipe H shown in the present embodiment, as shown in Figure 3, four coated

steel wire

3a, 3b, 3c and 3d as one group of S with predetermined pitch w curl continuous reeling, thereby make the coated steel wire 3d that in aforesaid winding process, is wound have identical pitch w with the coated steel wire 3a that in the winding process of back, is reeled.In other words,

steel wire

3a, 3b, 3c and the 3d of band coating are arranged side by side with predetermined interval w on cross section.

The stripping 5a of polyurethane resin is reeled with helical, thereby make its side edge portions overlapped on the external peripheral surface of the coated steel wire 3 of appointment, and overlapping side edge portions fused (or by for example urethane adhesive is bonding) together, to form tube wall 5.At this moment, the urethane adhesive 6 as a kind of hot-melt object is applied on the peripheral surface of coated steel wire 3 usually, thereby the stripping 5a of polyurethane resin is bonded on the steel wire 3 of each band coating.The stripping 5a of polyurethane resin is a kind of length and thin film, its width is four times suitable constant spacing 4w, this spacing be by four coated

steel wire

3a, 3b, 3c and 3d and previous on position adjacent the coated steel wire 3d of winding shaping form, promptly this width is that the spacing of five coated steel wire 3 is (in Fig. 3, stripping 5a is shaped in advance with wavy inhomogeneous shape, the ricing of its wavy inhomogeneous shape and coated steel wire 3 is complementary, but this stripping 5a also can be a smooth band).The JIS A level hardness of the stripping 5a of polyurethane resin is 70 degree.

In the polyurethane resin stripping 5a shown in the present embodiment, as shown in Figure 3, when tube wall 5 is shaped, use the resin extruded mould identical with polyurethane resin stripping 5a to squeeze out synchronous integrally formed four arrowband 4a with polyurethane resin stripping 5a on the outer surface part of polyurethane resin stripping 5a, wherein stripping 5a lays respectively on the peripheral surface of each coated steel wire 3.Therefore, when forming tube wall 5, on surface portion outside the tube wall 5 that covers each coated steel wire 3, form the tube wall 5 that comprises wear-resisting linear segment 4 by polyurethane resin stripping 5a.The JIS A level hardness of four arrowband 4a is 90 degree, and this hardness is greater than the hardness of polyurethane resin stripping 5a.

The polyurethane resin stripping 5a of each broad respectively comprises the polyurethane resin arrowband 4a of four high hardness, shown in arrow a and b among Fig. 3, order is wrapped on the peripheral surface of four coated

steel wire

3a, 3b, 3c and 3d with helical, and the side edge portions of stripping 5 is positioned on the steel wire 3 of a band coating simultaneously.The overlapped surfaces of stripping 5a is fused together, to form a series of spiral helicine tube walls 5.At this moment, the binder 6 resemble the hot-melt object is applied on the coating resin 2 of each coated steel wire 3, bonds to the stripping 5a that will form tube wall on the coating resin 2 of four coated

steel wire

3a, 3b, 3c and 3d.

In order the flexible pipe H that makes like this to be used as the flexible pipe of vacuum cleaner, at first need flexible pipe H is cut into the required length of dust collector hose; The

connection cylinder

6 and 7 that is formed separately is connected to respectively on the two ends of flexible pipe, as shown in Figure 4; Every group of two groups of copper facing hard steel wires 1 that comprise two coated steel wire 3 are connected respectively on each joint 6a and the 7a by welding; Two pairs of circuit between two

joint

6a and 7a, have been formed.

As mentioned above, connecting

cylinder

6 and 7 is connected on the two ends of dust collector hose.Then, show that the connection cylinder 7 that is positioned at an end is inserted into the suction tube E of electric dust collector main body C and is connected with suction tube E as figure institute 5.In addition, being positioned at connection cylinder 6 on the other end is inserted into and is positioned at the aspiration column D that holds on the operation pipe P and is connected with this aspiration column D.Like this, an air suction passage, one just can be set between main body of dust collector C and operation pipe P be used for the circuit that the circuit of ON/OFF main body of dust collector C and are used to be contained in the ON/OFF miniature motor of air-breathing mouth N, wherein air-breathing mouth N is positioned at the front end of operation pipe P, and these operations all can be finished by the switch S in the hand.

Fig. 6 to 8 shows second embodiment's flexible pipe H, and the flexible pipe H among this embodiment only uses the steel wire 3 of two band coatings, and the steel wire 3 of band coating have ever made explanation in the above-described embodiment.Coated steel wire 3 among second embodiment is made of a hard steel wire 1 that is coated with polyurethane resin 2, and this steel wire used in first embodiment.The steel wire 3a of two band coatings and 3b twine with a predetermined spacing w curl continuously as one group, and the coated steel wire 3b that forms that reels in the coiling operation in front has identical spacing w with the coated steel wire 3a that will be reeled in next reels operation.

The stripping 5a of polyurethane resin has the predetermined spacing of two suitable wide 2w, this spacing is to be formed by steel wire 3a, the 3b of two band coatings in winding process and the steel wire 3b that places earlier on close position, this stripping 5a is by the extrusion die extrusion moulding of laterally disposed synthetic resin squeezing unit (not illustrating in the drawings), be wrapped in then on the coated steel wire 3 forming tube wall 5, and below tube wall 5, be bonded on the coated steel wire 3 simultaneously.Polyurethane resin arrowband 4a with higher hardness is separately by the extrusion die extrusion moulding of laterally disposed synthetic resin squeezing unit (not shown), and the outside that is wound onto tube wall 5 then is to form the lineal shape part corresponding to the friction resistant of 3 abutting edges of coated steel wire.

Forming the polyurethane resin stripping 5a of tube wall 5 and the arrowband 4a of the wear-resisting linear segment 4 of formation can be fused together or bond to together by binder.In other words, resin streak carrying material 5a and arrowband 4a by the order of arrow a, b shown in Figure 8 and c in the shape of a spiral shape reel, and each contact surface is bonded to together, thereby forms tube wall 5.Other parts are suitable for the explanation to first embodiment too.

When the flexible pipe of making by the way is used as the flexible pipe of vacuum cleaner, can use this flexible pipe according to the described mode of first embodiment.

Polyurethane resin of the present invention specifically is meant a kind of urethane groups (resin material NH-COO-) that includes in molecule, this material is that the intermolecular reaction by following three kinds of compositions forms: 1, polyatomic alcohol polybasic alcohol (long chain diol), 2, diisocyanate, 3, short-chain diol.Polyatomic alcohol polybasic alcohol and short-chain diol and diisocyanate produce addition reaction, thereby form linear polyurethane.The characteristic of linear polyester is subjected to raw-material character, the condition of polymerization and the influence of component ratio.Its fundamental characteristics is decided by the kind of long chain diol substantially, and hardness can be controlled by the ratio of hard part.

The kind of long chain diol comprises: 1, the poly-lactone polyol of caprolactone class＜obtain by the caprolactone open loop 〉; 2, the polyatomic alcohol polybasic alcohol adipate ester of adipic acid class (=adipate types)＜adipic acid and ethylene glycol 〉; 3, the poly-tetramethylene glycol of PTMG (poly-tetramethylene glycol) class (=ester class)＜obtain by tetrahydrofuran ring opening polymerization〉etc.

Polyurethane resin comprises the good characteristic that some other resins do not possess.Be that polyurethane resin has following good characteristic: 1, good sliding resistant wear performance and antiscuffing properety energy; 2, excellent mechanical intensity, for example tensile strength and tearing toughness; 3, good oil resistance and petrol-resistance; 4, good cryogenic property and weathering resistance, ozone resistance; 5, this resin meets " food sanitation regulations " (No. 20 announcement of health and wellbeing portion).In the present invention, use polyurethane resin with above-mentioned characteristic.

Therefore, in the flexible pipe shown in first embodiment, as shown in Figure 2, approach and make its total thickness intimate even as much as possible by the thickness that makes tube wall 5, and wear-resisting linear segment 4 is arranged on the outer surface of tube wall part of covering coated steel wire 3.In addition, in the flexible pipe shown in second embodiment, as shown in Figure 7, bigger and only make the wall portion branch part of the peripheral surface that covers coated steel wire 3 very thin by the thickness that makes tube wall 5, and wear-resisting linear segment is arranged on this thin part, thereby the total thickness of tube wall 5 is close to evenly.But these embodiments' mode of execution all is representative mode of execution, the mid way of these mode of executions or the amended mode that the coating thickness of coated steel wire 3 is changed to suitable thickness also can be implemented.

Although to representing embodiments of the invention to make explanation, can also can satisfy above-mentioned requirements above, realize purpose of the present invention and produce in the scope of following effect implementing the present invention through suitable amended mode with other.In addition, flexible pipe of the present invention also can be applied to other occasion except that dust collector hose.

Can be clear that from above-mentioned explanation: flexible hose of the present invention uses the no chlorine resin material of appointment, during any resin material burning of the resin material on being coated in hard wire, the resin material that constitutes tube wall, the resin material of linear segment that is used for improving wear resistance and binder, can not produce and resemble the harmful like this gas of dioxin.Therefore, just can obtain a kind of flexible hose that can not pollute environment by burning in discarded back.

Flexible hose of the present invention comprises the wear-resisting linear segment that is arranged at surface portion outside the tube wall that covers coated steel wire, and this part is made by resin material, and the hardness of this resin material is greater than the hardness of the resin material that forms tube wall.Like this, because the bigger wear-resisting linear segment of hardness has anti-sliding friction and contacts scratch property, this flexible pipe not only has advantages of good abrasion, it can not damaged blindly, and be suitable for long-term use, but also can reduce the viscosity of the less polyurethane resin of the hardness when we catch flexible pipe, felt.

In addition, be used to make the proportion average out to 1.1 to 1.2 of polyurethane resin material of the present invention's flexible hose, and be 1.2 to 1.3 generally as the proportion of the polyvinyl chloride resin of hose material.Therefore, compare with the polyvinyl chloride resin flexible pipe, when using the tube wall of these made equal volume, its weight of the tube wall of polyurethane flexible pipe of the present invention can reduce 10% or more.In addition, polyurethane resin flexible pipe of the present invention has good anti-skimming wear and marresisttance, good tensile strength and tearing toughness, and good weathering resistance.Like this, because the average thickness of the tube wall of polyurethane resin flexible pipe of the present invention is thinner than the average thickness of the tube wall of polyvinyl chloride resin flexible pipe, therefore can further reduces the weight of flexible pipe, thereby can reduce the sense of fatigue in the using process.

Claims

1, a kind of flexible hose, it comprises:

Be with the polyurethane resin coating and be wound into spiral helicine steel wire (3) for one with a pre-constant pitch;

Polyurethane resin tube wall (5) by a film shape polyurethane resin stripping (5a) formation, shown in band (5a) curl be wound on the peripheral surface of steel wire (3) of band polyurethane resin coating, the overlapped surfaces of polyurethane resin stripping (5a) is fused or is bonded together simultaneously, and the tube wall of described polyurethane resin (5) is fused or bonds on the steel wire (3) of described band polyurethane resin coating;

One with helical coil polyurethane resin arrowband (4a) on the surface portion outside the polyurethane resin tube wall (5), described tube wall (5) covers on the peripheral surface of steel wire (3) of described band polyurethane resin coating, thereby the steel wire (3) of secondary cover tape polyurethane resin coating, described arrowband (4a) is fused to described tube wall (5) by one and goes up or bond on this tube wall by a kind of urethane adhesive (6), and the hardness of described polyurethane resin arrowband (4a) is greater than the hardness of polyurethane resin band (5a).

2, according to the flexible hose of claim 1, it is characterized in that: described polyurethane resin band (5a) is made of the resin of JIS A level hardness in 45 to 85 scopes, and described arrowband (4a) is made of the resin of JIS A level hardness in 70 to 99 scopes.

3, according to the flexible hose of claim 1, it is characterized in that: the steel wire (3) of described band polyurethane resin coating comprises a hard wire (1) that is coated with polyurethane resin material (2), and hard wire (1) is provided with a copper coatings.

4, according to the flexible hose of claim 1, it is characterized in that: the steel wire (3) of described band polyurethane resin coating comprises a hard wire (1) that is coated with polyurethane resin material (2), and described steel wire (1) is provided with one and is coated with bronze surface.

5, according to the flexible hose of claim 1, it is characterized in that: described flexible hose is used as the flexible pipe of electric dust collector.

6, according to the flexible hose of claim 1, it is characterized in that: described polyurethane resin band (5a) and arrowband (4a) are the resin streak carrying materials by a resin extruded mould while extrusion moulding.

7, according to the flexible hose of claim 1, it is characterized in that: the tube wall of described polyurethane resin (5) bonds on the steel wire (3) of described band polyurethane resin coating by urethane adhesive (6).

8, according to the flexible hose of claim 1, it is characterized in that: the overlapped surfaces of described polyurethane resin band (5a) bonds to together by urethane adhesive (6).

9, according to the flexible hose of claim 1, it is characterized in that: described polyurethane resin is a kind of resin material that includes urethane groups in molecule.