JPH1014834A - Cleaner hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaner hose having a high durability of such a structure that the overlapping parts of undulate thin bands are bonded or welded together and a joining part between an undulate thin band and a resin-covered electric wire is bonded or welded in a highs strength without generating poor workmanship in adhesion or welding at the time of winding fast. SOLUTION: Each undulate thin band 2 formed from a soft synthetic resin through an extruding process so that grooves and ridges 4, 5, 6, 7 are formed in/on the inner and outer surfaces, and is wound spirally while the its two side edges are overlapped, and a resin-covered electric wire 3 is laid in each groove 7 at the inner surface, and the overlapping parts 8 and 9 of the bands are bonded together and the joint part 13 between the band and electric wire is bonded. Thus a cleaner hose is formed. At the same time as extrusion of band 2, a resin binder layer 14 is formed on the surface of the band and the joint 13 of the overlapping parts 8 and 9 with the electric wire 3 by means of co-extrusion and bonded or welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly flexible synthetic resin cleaner hose having a resin-coated electric wire spirally disposed on an inner surface thereof.

[0002]

2. Description of the Related Art Conventionally, a corrugated thin strip material extruded with a soft synthetic resin so as to have a concave and a convex portion on the inner and outer surfaces is spirally wound by polymerizing both side edges of the corrugated ribbon material to form a concave strip on the inner surface side. A cleaner hose having a resin-coated electric wire attached thereto and bonding the overlapped portions of the corrugated ribbon and the joint between the corrugated ribbon and the resin-coated electric wire has already been provided.

[0003] However, in order to bond the overlapped portions of the corrugated ribbon and the joint between the corrugated ribbon and the resin-coated electric wire, first, the corrugated ribbon is extruded, and then the resin is coated on a wrapping machine. Immediately before supplying with the electric wire, the adhesive was applied by rotating the roller partly immersed in the adhesive reservoir and making contact with the lower surface of the corrugated ribbon material. In such a case, poor adhesion or poor appearance due to the protrusion of the adhesive occurs. In addition, the management of the liquid amount in the adhesive reservoir is troublesome.

Although the adhesive is applied to the corrugated ribbon, the adhesive can be applied only to the lower surface of the corrugated ribbon. Therefore, the adhesive is applied only to the lower surface of the corrugated ribbon. When the corrugated ribbon is polymerized and bonded to the lower surface of the corrugated ribbon, only one surface is coated with an adhesive, especially when the corrugated ribbon has a single-layer structure. Is low.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is intended to solve the problems described above, in which the overlapping portions of the corrugated ribbon and the joint between the corrugated ribbon and the resin-coated electric wire are formed as follows. It is an object of the present invention to provide a highly durable cleaner hose that does not cause poor adhesion or welding at the time of winding molding and that is bonded or welded with high strength.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method of manufacturing a corrugated thin strip material extruded from a soft synthetic resin so as to have uneven strips on the inner and outer surfaces, while spirally winding the corrugated strip material on both sides thereof. A resin-coated electric wire is attached to the inside of the concave strip on the side, and the overlapped portions of the corrugated ribbon and the joint between the corrugated ribbon and the resin-coated wire are bonded to each other. Simultaneously with the extrusion molding, a cleaner binder is formed by forming a resin binder layer by co-extrusion on the surface of the corrugated ribbon and at the junction with the overlapping portion and the resin-coated electric wire, and bonding or welding the hose. Thus, the above-mentioned problem was solved.

In addition, a plurality of resin-coated electric wires are provided at regular intervals in the concave strip on the inner surface side of the corrugated ribbon, and at least four copper wires are provided in an insulated state from each other. Or two resin-coated electric wires in which two copper wires are integrally formed with a space between each other, and are provided at a double pitch with a space between each other in a concave strip on the inner surface side of the corrugated ribbon. By being attached, it is possible to cope with the multifunctionalization of a vacuum cleaner of a type in which various operations are performed by a hand operation unit connected to the end of the hose. In addition, since the convex portions and the concave portions on the outer surface are formed at the same pitch, the appearance can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 4 show a first embodiment of the cleaner hose of the present invention, FIGS. 2 and 3 show a state in the course of manufacture, FIG. 4 shows a completed state, and FIG.
Denotes a cleaner hose, 2 denotes a corrugated ribbon, and 3 denotes a resin-coated electric wire.

The corrugated ribbon 2 is formed by extruding a soft synthetic resin such as polyvinyl chloride. As shown in FIG. 3, the convex strips 4 and the concave strips 5 are alternately formed on the outer surface side. The ridges 6 and the ridges 7 are alternately formed at equal intervals on the inner surface side. Here, the convex ridge 4 and the concave ridge 5 on the outer surface correspond to the concave ridge 7 and the convex ridge 6 on the inner surface, respectively. On one side edge of the corrugated ribbon 2, a female overlapping portion 8 facing the outer surface is formed, and on the other side edge of the corrugating ribbon 2, a male polymerizing portion 8 facing the inner surface is formed. A part 9 is formed. In the present embodiment, the protruding ridges 6 and the concave ridges 7 on the inner surface side are respectively formed at six locations, and the first, second, fourth, and fifth from the left side of the concave ridges 7,. The resin-coated electric wires 3,... Are arranged.

The resin-coated electric wire 3 is formed by coating two copper wires 10, 10 with a resin at an interval, and integrally molding the electric wires 11 with a flat connecting portion 12 therebetween. It is of the structure that was done. More specifically, the wire portion 11 has a circular cross section, and the connecting portion 12
Are arranged in the tangential direction. Then, the joining portions 13 and 4 of the second convex ridge 6 having the pair of resin-coated electric wires 3 and 3 having the outer surface side of each connecting portion 12 between the first and second concave ridges 7 and 7. The fifth and fifth concave ridges 7,
The wires 11 are attached or welded to the joints 13 of the fifth protruding ridges 6 provided between the ridges 7, and the electric wire portions 11 are additionally provided in the predetermined ridges 7, as described above. That is, the distance between the centers of the wire portions 11, 11 of the resin-coated wire 3 is the same as that of the concave streak portion 7,.
Is set to be equal to the pitch interval.

[0011] The cleaner hose 1 of the present invention comprises:
A corrugated ribbon 2 extruded with a soft synthetic resin so as to have concave and convex strips 4, 5, 6, 7 on the inner and outer surfaces is wound on the inner side while being spirally wound by polymerizing both side edges thereof. In addition to attaching the wire portion 11 of the resin-coated wire 3 to the inside 7 and bonding the overlapping portions 8 and 9 of the corrugated ribbon 2 to each other and the joining portion 13 between the corrugated ribbon 2 and the resin-coated wire 3, Simultaneously with the extrusion of the corrugated ribbon 2, a resin binder layer 14 is formed on the surface of the corrugated ribbon 2 by co-extrusion at the joints 13 with the overlapping portions 8 and 9 and the resin-coated electric wire 3. (See FIGS. 3 and 4). In addition, the joining portion 13 on the outer surface side of the connecting portion 12 of the resin-coated wire 3
In addition, when extruding the resin-coated electric wire 3, it is preferable to form the resin binder layer 14 in the same manner as described above.

As the material of the resin forming the resin binder layer 14, the same kind of material as the corrugated ribbon 2 or an appropriate material having good adhesion to the corrugated ribbon 2 is used. It is also preferable to form fine streaks on the overlapping portions 8 and 9 and the joining portion 13 of the corrugated ribbon 2 to roughen the surface, thereby physically increasing the adhesive strength with the resin binder layer 14.
Further, when the corrugated ribbon 2 and the resin-coated electric wire 3 are wound and formed, they are heated and welded, or the overlapping portions 8, 9 and the joining portion 13 are pressed from inside and outside, or both processes are performed. It is also preferable to use them in combination.

Further, in the present embodiment, the cleaner hose 1 is constituted only by the corrugated ribbon 2 and the resin-coated electric wire 3.
Further, the flat ribbon material serving as the inner cylindrical portion may be wound, and then the corrugated ribbon material 2 and the resin-coated electric wire 3 may be wound and formed. Also in this case, it is possible to form a resin binder layer by co-extrusion on the outer surface of the flat ribbon material in the same manner as described above.

Next, an apparatus and method for manufacturing the cleaner hose 1 of the present invention will be briefly described with reference to FIGS. As shown in FIG. 5, the co-extrusion molding apparatus for producing the corrugated ribbon 2 having the resin binder layer 14 formed thereon includes an injection molding machine 20 for supplying a resin material to be the corrugated ribbon 2.
And an injection molding machine 21 for supplying a resin material to be the resin binder layer 14. The injection molding machine 21 is connected to an injection port of the injection molding machine 21 on a side of a die 22 directly attached to the injection port of the injection molding machine 20. This is a structure in which supply pipes 23 are connected. Further, an apparatus for manufacturing the resin-coated electric wire 3 may be a conventionally known apparatus.

The die 22 has a structure in which three members, an inlet plate 22a, an intermediate plate 22b, and an outlet plate 22c, are laminated in this order from the side of the injection molding machine 20. The entrance plate 22
The joint surface between a and the intermediate plate 22b is indicated by A, and the joint surface between the intermediate plate 22b and the outlet plate 22c is indicated by B. The inlet plate 22a is
As shown in FIG. 6A, a supply hole 25 for connecting the supply pipe 23 for supplying the resin material of the resin binder layer 14 is provided at the center thereof, having an opening 24 through which the resin material of the corrugated ribbon 2 passes. Is provided at one end face, and the supply groove 26 extending to the edge of the opening 24 at the joining surface A and the supply hole 25 communicate internally. Also, the intermediate plate 22
6B, as shown in FIGS. 6B and 7A, the joint surface A has a concave portion 27 at the center corresponding to the opening 24, and the bottom surface of the concave portion 27 has the corrugated thin film. A corrugated slit 28 for extruding the strip 2 is formed, a supply groove 29 which is mirror-symmetrical to the supply groove 26 of the inlet plate 22a, and a supply groove corresponding to a longitudinal middle portion of the corrugated slit 28. At the end of 29, a through hole 30 penetrating through the joint surface B on the opposite side is formed. Here, the entrance plate 2
When the 2a and the intermediate plate 22b are superimposed on each other at the joint surface A, a resin passage communicating with the supply hole 25 is formed by the supply groove 26 and the supply groove 29. Also, the intermediate plate 2
As shown in FIG. 7 (a), a diversion groove 31 communicating with the through hole 30 is formed on the joining surface B of 2b, and the end 31a of the diversion groove 31 is the wavy slit 28, The female overlapping portion 8, the male overlapping portion 9, and the portions corresponding to the joint portions 13 with the resin-coated electric wire 3 are communicated with each other. As shown in FIG. 7 (b), the outlet plate 22c has a wavy slit 32 having the same shape as the wavy slit 28 at the center thereof, and a diversion mirror symmetric with the diversion groove 31 on the joining surface B. A groove 33 is formed, and an end 33 of the flow dividing groove 33 is formed.
are connected to predetermined portions of the wavy slit 32 in the same manner as described above. Here, the intermediate plate 22b and the outlet plate 22
c are superimposed on each other at the joint surface B.
In addition, a resin passage communicating with the waveform slits 28 and 32 is formed by the branch groove 33.

The die 22 is provided with the entrance plate 2.
2a is fixed to the injection port side of the injection molding machine 20;
An intermediate plate 22b and an outlet plate 22c are overlapped and fixed in a positioning state on 2a. Die 2 with such structure
2, the resin material injected from the injection molding machine 20 is extruded through the opening 24, the corrugated slit 28 and the corrugated slit 32 to form the corrugated ribbon 2, and at the same time, the resin material injected from the injection molding machine 21 is supplied to the supply pipe. 23, a supply groove 26, 29, a through hole 30, and a flow dividing groove 31, 33, the resin binder layer 1
4 is formed.

The corrugated ribbon 2 having the resin binder layer 14 produced by the above-mentioned extrusion molding apparatus and a pair of separately formed resin-coated electric wires 3 are supplied to a winding molding apparatus, and a cleaner hose is provided. 1 is manufactured.
Here, since the winding forming apparatus is conventionally known, a description thereof will be omitted.

FIG. 8 shows a second embodiment. The width of the ridges 4 on the outer surface side and the concave ridges 7 on the inner surface of the corrugated ribbon 2 is set to be larger than the width of the ridges 5 on the outer surface and the ridges 6 on the inner surface. The parts 4, 5, 6, 7 are formed at four places, respectively, and the adjacent concave ridges 7,
7, the electric wire portions 11, 11 of the resin-coated electric wire 3 similar to the above are disposed, and a joint portion 13 between the intermediate ridge portion 6 and the connecting portion 12 is provided.
Are bonded or welded by the resin binder layer 14. Other configurations are the same as those of the first embodiment, and thus the same or similar components are denoted by the same reference numerals and description thereof will be omitted.

FIG. 9 shows a third embodiment. The resin-coated electric wire 3 used here is obtained by coating two copper wires 10, 10 with a resin in an oval cross section, and forming a concave strip on the inner surface side of the corrugated ribbon 2 on which the resin-coated electric wire 3 is provided. The width of the ridges 7 is set to be larger than the width of the other ridges 7, and the width of the outer ridges 4 corresponding to the ridges 7 on which the resin-coated electric wires 3 are arranged is accordingly increased. The width is set to be larger than the width of the portion 4, and the resin binder layers 14 are formed on the surfaces of the bottom portions of the wide ridges 7, 7, respectively. It was done. Other configurations are the same as those of the first embodiment, and thus the same or similar components are denoted by the same reference numerals and description thereof will be omitted.

FIG. 10 shows a fourth embodiment. The resin-coated electric wire 3 used here is one in which one copper wire 10 is resin-coated in a circular cross-section, and the corrugated thin strip 2 is provided with concave and convex strips 4, 5, 6, and 7 on the inner and outer surfaces. Formed at equal pitches at four locations each, and each concave streak 7,
Are bonded by using the resin binder layer 14 formed on the bottom surface of the resin-coated electric wires 3, respectively. Other configurations are the same as those of the first embodiment, and thus the same or similar components are denoted by the same reference numerals and description thereof will be omitted.

[0021]

According to the cleaner hose of the present invention as described above, a corrugated ribbon extruded from a soft synthetic resin so as to have uneven strips on the inner and outer surfaces is formed into a spiral shape by polymerizing both side edges thereof. In a cleaner hose, a resin-coated electric wire is additionally provided in the concave portion on the inner surface side while being wound around, and a superposed portion of the corrugated ribbon is bonded to a joint between the corrugated ribbon and the resin-coated wire. Simultaneously with the extrusion of the corrugated ribbon, a resin binder layer was formed by co-extrusion on the surface of the corrugated ribbon and at the junction with the polymerized portion and the resin-coated electric wire, and was adhered or welded. Highly durable, high-strength bonding or welding between the overlapped portions of the corrugated ribbons and the joint between the corrugated ribbons and the resin-coated electric wire without causing poor adhesion or welding during winding molding. Also To become.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a cleaner hose of the present invention in a partially broken manner.

FIG. 2 is an explanatory perspective view showing a state in which a cleaner hose is manufactured by winding and forming a corrugated ribbon and a resin-coated electric wire.

FIG. 3 is a cross-sectional view of a disassembled state showing a procedure of winding forming of each member.

FIG. 4 is a partial cross-sectional view showing a finished product after winding molding.

FIG. 5 is a simplified plan view schematically showing an apparatus for co-extrusion of a corrugated ribbon.

6A and 6B show members constituting a die of the co-extrusion molding apparatus, wherein FIG. 6A is a plan view of the inlet plate as viewed from the joint surface A side, and FIG. 6B is a plan view of the intermediate plate as seen from the joint surface A side. It is.

7A and 7B show members constituting a die of the co-extrusion molding apparatus, wherein FIG. 7A is a plan view of the intermediate plate viewed from the joining surface B side, and FIG. 7B is a plan view of the exit plate seen from the joining surface B side. It is.

FIG. 8 is a partial sectional view showing a second embodiment of the cleaner hose of the present invention and showing a finished product after winding molding.

FIG. 9 is a partial sectional view showing a third embodiment of the cleaner hose of the present invention and showing a finished product after winding molding.

FIG. 10 is a partial sectional view showing a fourth embodiment of the cleaner hose of the present invention, showing a finished product after winding and forming.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaner hose 2 Corrugated ribbon material 3 Resin-coated electric wire 4 Outer side convex part 5 Outer side concave part 6 Inner side convex part 7 Inner side concave part 8 Female overlap part 9 Male overlap part DESCRIPTION OF SYMBOLS 10 Copper wire 11 Electric wire part 12 Connecting part 13 Joining part 14 Resin binder layer 20 Injection molding machine 21 Injection molding machine 22 Die 22a Inlet plate 22b Intermediate plate 22c Outlet plate 23 Supply pipe 24 Opening 25 Supply hole 26 Supply groove 27 Depression 28 Waveform Slit 29 Supply groove 30 Through hole 31 Dividing groove 31a End of dividing groove 31 32 Waveform slit 33 Dividing groove 33a Termination of dividing groove 33

Claims (4)

[Claims] 1. A corrugated ribbon which is extruded with a soft synthetic resin so as to have a concave and a convex portion on the inner and outer surfaces is coated with a resin on the inner concave portion while spirally winding the both side edges thereof. In a cleaner hose in which the electric wire is attached and the overlapping portion of the corrugated ribbon and the joint between the corrugated ribbon and the resin-coated electric wire are bonded, the corrugated ribbon is extruded simultaneously with the corrugated ribbon. A cleaner hose, wherein a resin binder layer is formed by co-extrusion on the surface of the ribbon material and on the joint portion between the overlapped portion and the resin-coated electric wire, and is adhered or welded. 2. A plurality of resin-coated electric wires are provided at regular intervals in a concave strip on the inner surface side of the corrugated ribbon, and at least four copper wires are provided in an insulated state from each other. The cleaner hose according to claim 1, wherein the cleaner hose comprises: 3. Two resin-coated electric wires in which two copper wires are integrally formed with a space therebetween are used, and they are attached to the inner surface side concave portion of the corrugated ribbon at a double pitch with a space between each other. The cleaner hose according to claim 2, which is provided. 4. The cleaner hose according to claim 1, wherein the convex ridges and the concave ridges on the outer surface are formed at an equal pitch.