JP2582631B2 - How to expand shrink tubing - Google Patents
How to expand shrink tubingInfo
- Publication number
- JP2582631B2 JP2582631B2 JP63271005A JP27100588A JP2582631B2 JP 2582631 B2 JP2582631 B2 JP 2582631B2 JP 63271005 A JP63271005 A JP 63271005A JP 27100588 A JP27100588 A JP 27100588A JP 2582631 B2 JP2582631 B2 JP 2582631B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- shrinkable tube
- strip
- tube
- spring
- 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 - Fee Related
Links
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Insulating Bodies (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は収縮チューブの拡径方向に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a direction in which a shrinkable tube is expanded.
［従来の技術］ 電力ケーブルなどの電線接続部を外部からの水の浸入
などを防ぐために収縮チューブによって覆う場合があ
り、そしてこのような場合には、ケーブルの接続に先立
って接続すべき電線の端部にあらかじめ収縮チューブが
挿通される。[Prior art] An electric wire connection part such as a power cable may be covered with a shrink tube in order to prevent water from entering from the outside, and in such a case, an electric wire to be connected prior to connection of the cable may be covered. A shrink tube is inserted through the end in advance.
このように収縮チューブを電線端部に挿通するために
は、該収縮チューブをその電線外径よりも大きい内径を
持つように拡径する必要があり、そのため作業現場にお
いて適宜の手工具などを用いてこの拡径作業を行なって
いる。In order to insert the contraction tube into the end of the electric wire in this way, it is necessary to expand the contraction tube so as to have an inner diameter larger than the outer diameter of the electric wire. Lever expansion work is performed.
従来実施されている拡径方法を第２図ないし第４図に
ついて説明すると、拡径すべき収縮チューブ１の内側に
適宜の拡径器の拡径セグメントS1、S2、S3、S4を当接
し、これら拡径セグメントを第４図に示されるように半
径方向外方に動かして収縮チューブ１の内径を所望の値
まで拡大させるものである。FIGS. 2 to 4 show a conventional method of expanding the diameter. FIG. 2 is a perspective view of the expanding segments S 1 , S 2 , S 3 , and S 4 of an appropriate expander inside the shrinkable tube 1 to be expanded. , And moving these enlarged segments radially outward as shown in FIG. 4 to enlarge the inner diameter of the shrinkable tube 1 to a desired value.
［発明が解決しようとする課題］ 拡径器の拡径セグメントは、収縮チューブ１の拡大す
る前の小さい内径の内部に挿入できる程度の直径の円周
複数等分、図示の例では４等分の拡径セグメントS1〜S4
を用いるため、各拡径セグメント間には当然隙間部分
Ａ、Ｂ、Ｃ、Ｄが生じる。拡径操作をして拡径セグメン
トを半径方向外方に動かすときは、この拡径セグメント
S1〜S4に接触している収縮チューブ１の円周部分は摩擦
のためこれらの拡径セグメントの外周部に対して相対移
動しにくいため、前述の隙間部分Ａ〜Ｄに対応する収縮
チューブ１の円周部分と比較すると延伸される度合いが
極度に低くなるものである。この結果最終的にも、隙間
部分Ａ〜Ｄに対応する収縮チューブ１の円周部分だけが
その他の部分に対して不均衡に延伸されることになり、
電線接続後の収縮チューブ１の加熱収縮時に全円周にわ
たる均一な収縮緊縛力が得られず、電線接続部に対する
密着性の低下を招く恐れがあった。[Problem to be Solved by the Invention] The enlarged diameter segment of the diameter expander is equally divided into a plurality of circumferences each having a diameter enough to be inserted into a small inner diameter of the contraction tube 1 before being expanded, and in the illustrated example, divided into four equal parts Expanded segments S 1 to S 4
Therefore, gap portions A, B, C, and D naturally occur between the enlarged segments. When moving the expanded segment radially outward by performing the expanding operation,
Since the circumferential portion of the shrinkable tube 1 that is in contact with S 1 to S 4 is hard to move relative to the outer peripheral portion of these enlarged diameter segments due to friction, the shrinkable tube corresponding to the above-described gap portions A to D The degree of stretching is extremely low as compared with the circumferential portion of No. 1. As a result, finally, only the circumferential portion of the shrinkable tube 1 corresponding to the gap portions A to D is unbalancedly stretched with respect to the other portions,
When the shrinkable tube 1 is shrunk by heating after the electric wire is connected, a uniform shrinkage binding force over the entire circumference cannot be obtained, and there is a possibility that the adhesion to the electric wire connection portion may be reduced.
［課題を解決するための手段］ この発明は前述の課題を解決するためになされたもの
であつて、内径を拡大すべき収縮チューブの内部に、該
収縮チューブの拡径後の内周長よりも大なる長さを有す
るバネ性介在帯板をその両端が重なり部となるように円
輪状に丸めて挿入する工程と、前記バネ性介在帯板の内
側に拡径器の拡径セグメントを当接させて収縮チューブ
が所望の内径になるまで該拡径セグメントの拡径操作を
行なう工程とを有する収縮チューブの拡径方向である。[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and has a structure in which a contracted tube whose inner diameter is to be enlarged has an inner peripheral length after the contracted tube is enlarged. A step of inserting a springy interposed strip having a large length into an annular shape so that both ends thereof become an overlapped portion, and applying an expanding segment of a diameter expander to the inside of the springy interposed strip. And performing a diameter-expanding operation of the diameter-expanding segment until the shrinkable tube reaches a desired inner diameter by contacting the shrinkable tube.
［作用］ 収縮チューブの内壁部は全円周にわたって均等にバネ
性介在帯板に接触する。しかして円輪状に丸められたバ
ネ性介在帯板は、自身の有するバネ性弾発力によってそ
の重ね合わせ部の重なり部分の長さが漸次減少するよう
に常にその直径を拡大させんとしており、そしてそのバ
ネ性介在帯板の内側の拡径セグメントによる半径方向外
方への押圧力によりバネ性介在帯板の直径の拡大が促さ
れ、かくして収縮チューブが全円周にわたって均一に拡
径される。[Operation] The inner wall portion of the contraction tube uniformly contacts the spring-like intervening strip over the entire circumference. However, the spring-like intervening strip that has been rounded into a ring shape is constantly expanding its diameter so that the length of the overlapping portion of the overlapped portion gradually decreases due to its own springy elastic force, The radially outward pressing force of the radially expanding segment inside the springy interposed strip promotes the expansion of the diameter of the springy interposed strip, thus uniformly shrinking the shrink tube over the entire circumference. .
［実施例］ 第１図（ａ）、（ｂ）についてこの発明の方法を説明
する。[Embodiment] The method of the present invention will be described with reference to FIGS. 1 (a) and 1 (b).
内径を拡大すべき目的の収縮チューブ１の内部に、ま
ずバネ性介在帯板２を円輪状に丸めて挿入する。このと
きバネ性介在帯板２の長さが収縮チューブ１の内周長に
対して余るときは当然重なり部21ができることになる。First, the springy intervening strip 2 is inserted into the inside of the shrinkable tube 1 whose inner diameter is to be expanded, in a circular shape. At this time, when the length of the spring interposed strip 2 is longer than the inner peripheral length of the shrinkable tube 1, an overlapping portion 21 is naturally formed.
このバネ性介在帯板２は適宜の幅と、拡径後の収縮チ
ューブ１の内周部の長さよりも大なる長さを有するもの
で、例えば帯状のばね鋼板、ステンレス鋼板、あるいは
燐青銅板などの薄板材が使用される。The springy interposed strip 2 has an appropriate width and a length greater than the length of the inner peripheral portion of the shrinkable tube 1 after the diameter expansion. For example, a strip-shaped spring steel plate, a stainless steel plate, or a phosphor bronze plate Such as a thin plate material is used.
このようなバネ性介在帯板２は、収縮チューブ１に対
して摩擦係数が低く、その表面が平滑であるので収縮チ
ューブ１とは相互に滑りやすいものである。Such a springy interposed strip 2 has a low coefficient of friction with respect to the shrinkable tube 1 and has a smooth surface, so that it is easily slipped with respect to the shrinkable tube 1.
バネ性介在帯板２を丸めて挿入した後にそのバネ性介
在帯板２の内側に従来方法と同様に拡径セグメントS1〜
S4を配置し、この拡径セグメントS1〜S4を同図（ｂ）に
示されるように半径方向外方に向かって動かすことによ
って丸められたバネ性介在帯板２の内径を拡大させる。After the spring interposed strip 2 is rolled and inserted, inside the spring interposed strip 2, the enlarged diameter segments S 1-
The S 4 are arranged, to enlarge the inner diameter of the spring inclusions strip 2 rounded by moving radially outwardly as shown the enlarged diameter segment S 1 to S 4 in FIG. (B) .
このときバネ性介在帯板２は、自身の有するバネ性弾
発力によってその重なり部21の重なり長さを漸次短くす
るように常にその円輪内径を拡大せんとしており、これ
に加えて拡径セグメントS1〜S4による半径方向外方へ向
かう強制的な拡径力が作用するのでバネ性介在帯板２は
容易に拡径し、かくして収縮チューブ１の拡径がなされ
るものである。At this time, the spring interposed band plate 2 always expands its inner diameter so as to gradually reduce the overlapping length of the overlapping portion 21 by its own spring resilient force. since forced diameter force directed radially outward by the segments S 1 to S 4 acts on the spring inclusions strip 2 easily expanded, thus in which the enlarged diameter of the shrink tube 1 is made.
注目すべきことは、収縮チューブ１とバネ性介在帯板
２とは相互に滑りやすいために、収縮チューブ１はその
周壁の円周方向の特定の一部分が拘束されて他部分より
も大きく延伸される事態が避けられ、全円周が均等に伸
ばされることである。上述のことはまた、バネ性介在帯
板２の存在のゆえに、拡径セグメントS1〜S4により収縮
チューブ１に与えられる半径方向外方に向かう延伸力が
収縮チューブの全円周にわたって均一にならされるため
でもある。すなわちバネ性介在帯板２自体が均圧板の役
目を果たすわけである。It should be noted that since the shrinkable tube 1 and the spring interposed strip 2 are liable to slide with each other, the shrinkable tube 1 is constrained at a specific circumferential portion of its peripheral wall and stretched more than the other portions. Is avoided and the entire circumference is evenly stretched. Also the above, because of the presence of spring inclusions strip 2, uniformly stretching force directed radially outwardly applied to shrink the tube 1 by the enlarged diameter segment S 1 to S 4 is over the entire circumference of the shrink tube It is also to be done. That is, the springy intervening strip 2 itself serves as a pressure equalizing plate.
なお第５図および第６図は拡径器の一例を示すもので
あって、これは円輪状のブラケット３の円周４等分位置
において半径方向に可動に延びる４個の拡径セグメント
S1〜S4がそれぞれレバ４によって操作される構成のもの
である。FIGS. 5 and 6 show an example of a diameter expander, which comprises four diameter-expanding segments movably extending in the radial direction at four equally-spaced positions on the circumference of a ring-shaped bracket 3.
Each of S 1 to S 4 is operated by the lever 4.
［発明の効果］ この発明によれば、収縮チューブの内側に相互に滑り
やすいバネ性介在帯板が円輪状に丸めて挿入され、かつ
拡径セグメントにより上記バネ性介在帯板を介して収縮
チューブをその半径方向外方に向かって押圧拡径させる
ので、収縮チューブはその周壁の全円周にわたって均一
に拡径され、延いては、この収縮チューブを電線接続部
等に均等に収縮密着させることができるものである。[Effects of the Invention] According to the present invention, a mutually resilient spring-like interposed strip is rolled into a ring shape and inserted into the inside of a shrinkable tube, and the contraction tube is inserted through the above-mentioned springy interposed strip by a diameter increasing segment. The diameter of the shrinkable tube is increased radially outward, so that the shrinkable tube is uniformly expanded over the entire circumference of the peripheral wall. Can be done.
第１図（ａ），（ｂ）はこの発明による収縮チューブの
拡径前、拡径後の状態を示す横断面図、第２図および第
３図は従来の方法による拡径前の状態を示すそれぞれ側
断面図および横断面図、第４図は同じく拡径後の状態を
示す横断面図、第５図および第６図は拡径器の一例を示
す側面図および正面図である。 １……収縮チューブ、２……バネ性介在帯板、S1〜S4…
…拡径セグメント。1 (a) and 1 (b) are cross-sectional views showing a state before and after expansion of a shrinkable tube according to the present invention, and FIGS. 2 and 3 show a state before expansion by a conventional method. FIG. 4 is a cross-sectional view showing the same state after diameter expansion, and FIGS. 5 and 6 are a side view and a front view showing an example of the diameter expander. 1 ...... shrink tubing, 2 ...... springy intervening strip, S 1 to S 4 ...
… Extended diameter segment.
Claims (1)
部に、該収縮チューブの拡径後の内周長よりも大なる長
さを有するバネ性介在帯板（２）をその両端が重なり部
（21）となるように円輪状に丸めて挿入する工程と、 前記バネ性介在帯板（２）の内側に拡径器の拡径セグメ
ント（S1〜S4）を当接させて収縮チューブ（１）が所望
の内径になるまで該拡径セグメント（S1〜S4）の拡径操
作を行なう工程とを有する収縮チューブの拡径方法。A shrinkable tube (1) whose inner diameter is to be increased is provided inside a shrinkable tube (1) with a spring interposed strip (2) having a length greater than the inner circumferential length of the shrinkable tube after the expansion. a step of inserting rounded to circular ring so that the overlapping portion (21), the inside is brought into contact with reamer diameter segments (S 1 to S 4) of the spring inclusions strip (2) Performing a diameter-expanding operation on the diameter-expanding segments (S 1 to S 4 ) until the contraction tube (1) has a desired inner diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63271005A JP2582631B2 (en) | 1988-10-28 | 1988-10-28 | How to expand shrink tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63271005A JP2582631B2 (en) | 1988-10-28 | 1988-10-28 | How to expand shrink tubing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02117814A JPH02117814A (en) | 1990-05-02 |
| JP2582631B2 true JP2582631B2 (en) | 1997-02-19 |
Family
ID=17494086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63271005A Expired - Fee Related JP2582631B2 (en) | 1988-10-28 | 1988-10-28 | How to expand shrink tubing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2582631B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012171306A (en) * | 2011-02-24 | 2012-09-10 | Shin Etsu Polymer Co Ltd | Method of manufacturing pipe covered with tube |
-
1988
- 1988-10-28 JP JP63271005A patent/JP2582631B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02117814A (en) | 1990-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3881033B2 (en) | Cable sieving arrangement | |
| JP3394545B2 (en) | Inserts used in hose clamp devices | |
| JP4294855B2 (en) | Crack splitting device for annular parts | |
| US4141576A (en) | Heat shrinkable sleeve for coupling pipe sections | |
| US5053097A (en) | Method of joining tubes having a corrugated wall of plastic material | |
| GB2105425A (en) | Hose coupling | |
| US3993334A (en) | Pipe jointing piece with O-rings | |
| JPH023719A (en) | End section member of air spring and assembly of air spring | |
| JPH08506407A (en) | METHOD FOR FORMING A PIPE CONNECTION AND TOOLS AND CONNECTION SLEEVE PROPERLY USED FOR Practicing This Method | |
| US4654241A (en) | Cable joint monolithic sleeve installing apparatus | |
| JPH0733879B2 (en) | Elastically expandable annular strap | |
| JPS61252990A (en) | Flange ring for pipe | |
| JP2582631B2 (en) | How to expand shrink tubing | |
| JPS6044682A (en) | Spring ring | |
| RU96111419A (en) | PIPE GASKET | |
| US4114258A (en) | Method of making a stator assembly | |
| JP2001516556A (en) | Recoverable articles | |
| US20040255432A1 (en) | Hose clamping device | |
| JP3751376B2 (en) | Hose base mounting method and apparatus | |
| JP2501483Y2 (en) | Core chuck | |
| GB1340237A (en) | Method of reforming the ends of helically grooved or helically corrugated tubular sheet metal duct sections | |
| CZ42795A3 (en) | Pipe coupling | |
| JPS61249625A (en) | Tension reel mandrel | |
| JP3119778B2 (en) | Corrosion protection cap on pipe end | |
| JP2002027627A (en) | Conductor connection tube and power cable joint using the connection tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |