JPS6225501B2 - - Google Patents
Info
- Publication number
- JPS6225501B2 JPS6225501B2 JP53116002A JP11600278A JPS6225501B2 JP S6225501 B2 JPS6225501 B2 JP S6225501B2 JP 53116002 A JP53116002 A JP 53116002A JP 11600278 A JP11600278 A JP 11600278A JP S6225501 B2 JPS6225501 B2 JP S6225501B2
- Authority
- JP
- Japan
- Prior art keywords
- flexible tube
- coating layer
- soft coating
- packing
- band
- 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.)
- Expired
Links
- 239000011247 coating layer Substances 0.000 claims description 20
- 238000012856 packing Methods 0.000 claims description 12
- 239000012815 thermoplastic material Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、電線の地中埋設、産業機械の配線に
おけるが如き防液性と屈曲性とを要求される電気
配管に使用する可撓管に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible tube used for electrical piping that requires liquid resistance and flexibility, such as underground wiring for electric wires and wiring for industrial machinery.
従来、このような可撓管は、例えば、横断面略
Ｓ字状に形成した金属帯の一側縁を他側縁に重合
しながら螺旋状に巻いて、外周部に螺旋状の溝を
凹設した可撓管体を形成し、この可撓管体の外周
には、塩化ビニル樹脂の如き熱可塑材にて筒状の
軟質被覆層を形成して構成されていたが、この軟
質被覆層は、可撓管体の外周を被覆しているだけ
で、これらの間には何らの結合力も作用しないた
め、このような可撓管を屈曲させると、軟質被覆
層の屈曲部が可撓管体の外周面より剥離して屈曲
し、内側部における軟質被覆層に皺を発生し、こ
のような屈曲を繰返すうちに軟質被覆層と可撓管
体の屈曲部に亀裂が生じ、遂には、可撓管が折損
し、また、このような可撓管にねじれ、引張り等
の外力が加わつた場合においても、軟質被覆層が
可撓管体から剥離してねじれ、或いは引張られ、
遂には内部電線を損傷してしまうという欠点があ
つた。 Conventionally, such flexible tubes have been made by, for example, winding a metal band having a substantially S-shaped cross section in a spiral shape while overlapping one side edge with the other side edge, and forming a spiral groove in the outer periphery. A cylindrical soft coating layer made of a thermoplastic material such as vinyl chloride resin was formed on the outer periphery of the flexible tube body. The flexible tube only covers the outer periphery of the flexible tube and no bonding force acts between them, so when such a flexible tube is bent, the bent part of the soft coating layer It peels off and bends from the outer circumferential surface of the body, causing wrinkles in the soft covering layer on the inner side, and as such bending is repeated, cracks occur in the soft covering layer and the bent part of the flexible tube body, and finally, Even if the flexible tube is broken and an external force such as twisting or tension is applied to such a flexible tube, the soft coating layer will peel off from the flexible tube body and be twisted or pulled.
The drawback was that it ended up damaging the internal wires.
本発明は、このような欠点を解消するために提
案されたもので、簡単な構造にて防液性と屈曲性
にすぐれ、繰返し屈曲、ねじれ及び引張り等に対
する耐性が大きい可撓管の製法を得るにある。 The present invention was proposed in order to eliminate these drawbacks, and provides a method for manufacturing a flexible tube that has a simple structure, has excellent liquid resistance and flexibility, and has high resistance to repeated bending, twisting, and tension. There is something to be gained.
以下、本発明の構成を別紙実施例図に従つて詳
述すると、第１図において、例えば、亜鉛メツキ
帯鋼の如き帯状の金属を製管用ダイス装置にて横
断面略Ｓ字状の帯体１に成型し、この帯体１の一
側縁における上向きの後側縁部２に、この帯体１
の他側縁における下向きの前側縁部３を重合しな
がら螺旋状に巻いて、この重合部には、軟質塩化
ビニル樹脂の如き熱可塑材にて帯状に形成したパ
ツキン４を介装して、第１図に示した如き管体の
外周部に螺旋状の溝５を形成し、かつ、この溝５
の底部にてパツキン４を螺旋状に挾着した可撓管
体６を形成する。 Hereinafter, the structure of the present invention will be described in detail with reference to the attached embodiment drawings. In FIG. 1, and on the upward rear edge 2 of one side edge of this band 1,
The downward facing front edge 3 of the other side edge is wound spirally while overlapping, and a band-shaped packing 4 made of a thermoplastic material such as soft vinyl chloride resin is interposed in this overlapping part, A spiral groove 5 is formed on the outer periphery of the tube as shown in FIG.
A flexible tube body 6 is formed with a packing 4 spirally clamped at the bottom of the tube.
このように、上記重合部に介装される帯状のパ
ツキン４の一側縁部には、第１図に示した如く、
可撓管体６の外周面に露出させておき、また、こ
のパツキン４は、後述の軟質被覆層を形成する熱
可塑材より軟化点が低く、かつ、互いに加熱によ
り、融着する熱可塑材で構成しておく。次に、例
えば、第２図に示した如き押出成型機７に投入し
た軟質塩化ビニル樹脂の如き熱可塑材を加熱しな
がら、回転するスクリユー８にて筒状に押出しな
がら、このスクリユー８の基部側にて筒芯部に、
上記可撓管体６を連続的に挿入して、この可撓管
体６の外周に軟質被覆層９を形成した後、冷却装
置１０で冷却しながら巻取装置１１で巻取る。こ
のとき、押出成型機７の加熱温度を調節して、こ
の軟質被覆層９の内周部は、第３図に示した如く
前記帯体１の重合部に介装され可撓管体６の外周
に螺旋状に露出せしめたパツキン４と一体に融着
するようにする。 As shown in FIG. 1, one side edge of the band-shaped packing 4 interposed in the overlapping part has
The packing 4 is made of a thermoplastic material that is exposed on the outer peripheral surface of the flexible tubular body 6 and that has a lower softening point than the thermoplastic material that forms the soft coating layer described later, and that can be fused together by heating. It is composed of Next, for example, while heating a thermoplastic material such as a soft vinyl chloride resin fed into an extrusion molding machine 7 as shown in FIG. On the side, to the cylinder core,
After the flexible tubular body 6 is continuously inserted and a soft coating layer 9 is formed on the outer periphery of the flexible tubular body 6, the flexible tubular body 6 is cooled by a cooling device 10 and wound up by a winding device 11. At this time, the heating temperature of the extrusion molding machine 7 is adjusted so that the inner peripheral part of the soft coating layer 9 is inserted into the overlapping part of the band 1 as shown in FIG. It is made to be integrally fused with a packing 4 exposed spirally on the outer periphery.
以上のように構成された本発明において、帯体
１の重合部には、螺旋状にパツキン４を介装した
ので可撓管体６のシール効果が向上する。このパ
ツキン４は、軟質被覆層９を形成する熱可塑材よ
り軟化点が低く、かつ、互いに加熱により融着す
る熱可塑材で構成したので、この可撓管体６の外
周に、加熱しながら被着された軟質被覆層９の内
周部は、第３図に示した如く可撓管体６の外周部
に螺旋状に凹設された溝５の底部にて、螺旋状に
配設されたパツキン４と一体に融着して固定され
る。このため、軟質被覆層９は屈曲する可撓管体
６と一体、かつ、均一に伸縮して、この可撓管を
屈曲したとき、屈曲外側部において軟質被覆層９
の内周部が溝５から浮上つたり、また、屈曲内側
部において軟質被覆層９が可撓管体６の表面より
剥離しながら皺を生じたりすることはない。同様
にして、この可撓管を捩つたり或いは引張した場
合においても、軟質被覆層９は、パツキン４を介
して可撓管体６と一体に固定されているので、軟
質被覆層９に、局部的に大なる応力が利用して、
軟質被覆層９が可撓管体６から剥離したり、皺を
生ずることがなく、軟質被覆層９は可撓管体６と
一体、かつ、均一に伸縮する。 In the present invention configured as described above, the sealing effect of the flexible tubular body 6 is improved because the packing 4 is spirally interposed in the overlapping portion of the band 1. Since the packing 4 is made of a thermoplastic material that has a lower softening point than the thermoplastic material forming the soft coating layer 9 and is fused to each other when heated, it is attached to the outer periphery of the flexible tubular body 6 while being heated. The inner periphery of the applied soft coating layer 9 is spirally disposed at the bottom of the groove 5 that is spirally recessed in the outer periphery of the flexible tubular body 6, as shown in FIG. It is fused and fixed integrally with the packing 4. Therefore, the soft coating layer 9 expands and contracts uniformly and integrally with the bending flexible tube body 6, so that when the flexible tube is bent, the soft coating layer 9
The inner circumferential portion of the flexible tube body 6 will not float up from the groove 5, and the soft coating layer 9 will not peel off from the surface of the flexible tube body 6 and wrinkle at the bent inner side. Similarly, even when this flexible tube is twisted or stretched, the soft coating layer 9 is fixed integrally with the flexible tube body 6 via the packing 4, so that the soft coating layer 9 Using locally large stress,
The soft coating layer 9 does not peel off from the flexible tubular body 6 or wrinkle, and the soft coating layer 9 expands and contracts uniformly and integrally with the flexible tubular body 6.
本発明は叙述の如く可撓管に繰返し屈曲、ねじ
れ、引張り等の外力の加わつた場合においても、
軟質被覆層９は可撓管体６と一体的に伸縮して、
軟質被覆層９が可撓管体６から剥離したり、この
軟質被覆層９に局部的に大きな繰返し応力が作用
することがないので、この可撓管の損傷、亀裂、
折損を防止することができる。また、本発明の可
撓管の構造は非常に簡単であるため、屈曲性を損
なうこともなく、耐久性を大幅に向上する等著大
な効果を奏する。 As described above, even when external forces such as repeated bending, twisting, and tension are applied to the flexible tube, the present invention can
The soft covering layer 9 expands and contracts integrally with the flexible tube body 6,
Since the soft coating layer 9 does not peel off from the flexible tube body 6 and large repeated stress does not act locally on the soft coating layer 9, damage, cracks, and damage to the flexible tube are prevented.
Breakage can be prevented. Further, since the structure of the flexible tube of the present invention is very simple, it does not impair its flexibility and has significant effects such as greatly improving durability.
第１図は可撓管体の要部切欠側面図、第２図は
本発明を実施するための装置の一部切欠側面図、
第３図は可撓管の要部切欠側面図である。
符号説明、１……帯体、２……後側縁部、３…
…前側縁部、４……パツキン、５……溝、６……
可撓管体、７……押出成型機、８……スクリユ
ー、９……軟質被覆層、１０……冷却装置、１１
……巻取装置。
FIG. 1 is a cutaway side view of the main part of the flexible tubular body, FIG. 2 is a partially cutaway side view of the device for carrying out the present invention,
FIG. 3 is a cutaway side view of the main part of the flexible tube. Explanation of symbols, 1... band, 2... rear edge, 3...
...Front edge, 4...Packing, 5...Groove, 6...
Flexible tubular body, 7... Extrusion molding machine, 8... Screw, 9... Soft coating layer, 10... Cooling device, 11
... Winding device.
Claims (1)
に重合し、且つ、この上面より熱可塑材を被着し
て軟質被覆層を形成した可撓管に於て、前記Ｓ字
形に形成した帯状体の重合部の凹部外側に熱可塑
材にて帯状に形成したパツキンを挾着し、更に、
このパツキンを前記被覆層の内周部と一体に融着
して成る可撓管。1. In a flexible tube in which one side edge of a band shape formed in an S-shaped cross section is overlapped with the other side edge, and a thermoplastic material is applied from the upper surface to form a soft coating layer, the above-mentioned S-shaped A band-shaped packing made of thermoplastic material is attached to the outside of the concave portion of the overlapping portion of the band-shaped body formed in the above, and further,
A flexible tube made by integrally welding this packing to the inner circumference of the coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11600278A JPS5542815A (en) | 1978-09-22 | 1978-09-22 | Manufacture of flexible pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11600278A JPS5542815A (en) | 1978-09-22 | 1978-09-22 | Manufacture of flexible pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5542815A JPS5542815A (en) | 1980-03-26 |
| JPS6225501B2 true JPS6225501B2 (en) | 1987-06-03 |
Family
ID=14676398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11600278A Granted JPS5542815A (en) | 1978-09-22 | 1978-09-22 | Manufacture of flexible pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5542815A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58221926A (en) * | 1982-06-17 | 1983-12-23 | 富士写真光機株式会社 | Production of flexible tube of endoscope |
| GB9123760D0 (en) * | 1991-11-08 | 1992-01-02 | Stockman Anthony J | Optical fibre sheathing |
| JPH07205329A (en) * | 1994-01-13 | 1995-08-08 | Sekisui Chem Co Ltd | Synthetic resin pipe and its manufacture |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51128021A (en) * | 1975-05-01 | 1976-11-08 | Hakko Vinyl Seisakusho:Kk | Reinforced polyurethane hose and its making process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4910128U (en) * | 1972-04-27 | 1974-01-28 |
-
1978
- 1978-09-22 JP JP11600278A patent/JPS5542815A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51128021A (en) * | 1975-05-01 | 1976-11-08 | Hakko Vinyl Seisakusho:Kk | Reinforced polyurethane hose and its making process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5542815A (en) | 1980-03-26 |
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