JP2003204613A - Method of holding expanded diameter, and diameter- expanding device for cylindrical elastic material component - Google Patents
Method of holding expanded diameter, and diameter- expanding device for cylindrical elastic material componentInfo
- Publication number
- JP2003204613A JP2003204613A JP2002002123A JP2002002123A JP2003204613A JP 2003204613 A JP2003204613 A JP 2003204613A JP 2002002123 A JP2002002123 A JP 2002002123A JP 2002002123 A JP2002002123 A JP 2002002123A JP 2003204613 A JP2003204613 A JP 2003204613A
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- Japan
- Prior art keywords
- diameter
- tubular member
- expanding
- tubular
- inner diameter
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば電力ケーブ
ルの直線接続部を構成する為に使用する常温収縮チュー
ブ等の弾性材製筒状部材の内径を弾性的に広げると共
に、この弾性材製筒状部材の内径が弾性的に広がった状
態を保持する方法、並びに、この方法を実施する為に使
用する拡径装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention elastically expands the inner diameter of a tubular member made of an elastic material such as a cold-shrinkable tube used for forming a straight connecting portion of a power cable, and the tubular material made of the elastic material. TECHNICAL FIELD The present invention relates to a method for maintaining a state in which the inner diameter of a cylindrical member is elastically expanded, and a diameter expansion device used for carrying out this method.
【０００２】[0002]
【従来の技術】例えば、電力ケーブルの直線接続部を構
成する為に使用する常温収縮チューブは、弾性材により
全体を円筒状に構成している。そして、使用時には、１
対の電力ケーブルを構成するケーブル導体の端部同士を
互いに電気的且つ機械的に接続した状態で、この接続部
の周囲に配置し、その内周面を上記各ケーブル導体の周
囲に設けたケーブル絶縁体の端部外周面に弾性的に当接
させる。2. Description of the Related Art For example, a cold-shrink tube used for forming a straight connecting portion of a power cable is made of an elastic material to have a cylindrical shape as a whole. And when used, 1
A cable in which the end portions of the cable conductors forming the pair of power cables are electrically and mechanically connected to each other and are arranged around this connection portion, and the inner peripheral surface thereof is provided around each of the cable conductors. The outer peripheral surface of the end portion of the insulator is elastically abutted.
【０００３】この様なケーブル接続部を構成する常温収
縮チューブの様に、その内周面を所定部分の外周面に弾
性的に当接させた状態で使用する弾性材製の筒状部材
が、各種の分野で多種存在する。又、この様な筒状部材
の設置を行なう場合、即ち、この筒状部材の内周面を上
記所定部分の外周面に弾性的に当接させる場合に、筒状
の拡径保持材を使用する事が一般的に行なわれている。
即ち、この様な拡径保持材を使用して上記筒状部材の設
置を行なう場合には、先ず、この筒状部材の内径を弾性
的に広げて、この筒状部材を上記拡径保持材に弾性的に
外嵌する。これにより、この筒状部材の拡径状態を保持
する。次いで、この様に拡径保持材に外嵌した筒状部材
を、上記所定部分の周囲に配置する。その後、この筒状
部材の内径側から上記拡径保持材を抜き取る事により、
この筒状部材を自身の弾性に基づいて縮径させ、この筒
状部材の内周面を上記所定個所の外周面に弾性的に当接
させる。A tubular member made of an elastic material, which is used with its inner peripheral surface elastically abutting on the outer peripheral surface of a predetermined portion, like a cold-shrinkable tube which constitutes such a cable connecting portion, There are many types in various fields. Further, when such a tubular member is installed, that is, when the inner peripheral surface of the tubular member is elastically brought into contact with the outer peripheral surface of the predetermined portion, a tubular expansion holding material is used. It is generally done.
That is, when the tubular member is installed using such a diameter-expanding holding material, first, the inner diameter of the tubular member is elastically expanded so that the tubular member is expanded with the diameter-expanding holding material. It is fitted elastically to. As a result, the expanded state of the tubular member is maintained. Next, the tubular member externally fitted to the diameter expansion holding material in this manner is arranged around the predetermined portion. After that, by pulling out the expanded diameter holding material from the inner diameter side of this tubular member,
The tubular member is reduced in diameter based on its elasticity, and the inner peripheral surface of the tubular member is elastically brought into contact with the outer peripheral surface of the predetermined portion.
【０００４】上記拡径保持材を使用して上記筒状部材を
設置する手順は以上に述べた通りであるが、従来、上述
の様に筒状部材の内径を弾性的に広げてこの筒状部材を
上記拡径保持材に弾性的に外嵌する作業（即ち、この筒
状部材の拡径保持作業）は、大掛かりな装置を使用して
行なっていた。この為、装置のコストが嵩むだけでな
く、作業能率も良くなかった。この為、装置のコストを
低減できると共に作業能率の向上を図れる技術の提供が
望まれている。The procedure for installing the tubular member using the diameter expansion holding material is as described above. Conventionally, however, the tubular member is elastically widened as described above. The work of elastically fitting the member to the diameter expansion holding material (that is, the diameter expansion holding work of this tubular member) has been performed using a large-scale device. Therefore, not only the cost of the apparatus is increased, but also the work efficiency is not good. Therefore, it is desired to provide a technique capable of reducing the cost of the device and improving the work efficiency.
【０００５】[0005]
【先発明の説明】そこで、本発明者は先に、上述の様な
要望に応えられる拡径装置を発明した。図７〜１６は、
この様な先発明に係る拡径装置により、弾性材製筒状部
材の拡径保持作業を行なう状況を示している。拡径保持
作業の対象となる筒状部材１は、ゴム等の弾性材により
全体を円筒状に構成している。又、この筒状部材１の拡
径保持作業を行なう為の拡径装置２は、１対の拡径治具
３、３と、ガイド棒４と、ぞれぞれが押圧手段を構成す
る１対ずつのナット５、５及び押圧板６、６と、１対の
拡径保持材７、７とを備える。DESCRIPTION OF THE PRESENT INVENTION Therefore, the present inventor has previously invented a diameter expanding device that can meet the above-mentioned demands. 7-16,
A situation is shown in which the diameter-expanding device according to the preceding invention is used to perform the diameter-expansion holding work for the elastic tubular member. The tubular member 1 to be subjected to the diameter expansion holding work is made of an elastic material such as rubber to have a cylindrical shape as a whole. Further, a diameter expansion device 2 for performing the diameter expansion holding work of the tubular member 1 includes a pair of diameter expansion jigs 3 and 3, a guide rod 4, and each of them constitutes a pressing means. A pair of nuts 5 and 5 and pressing plates 6 and 6 and a pair of diameter expansion holding members 7 and 7 are provided.
【０００６】このうちの拡径治具３、３はそれぞれ、全
体を厚肉円筒状に構成しており、外径寸法を上記筒状部
材１の自由状態での内径寸法よりも大きくしている。
又、これら各拡径治具３、３の先端部外周面は、先端側
に向かう程外径が小さくなる方向に傾斜する円すい凸面
８としている。又、この円すい凸面８の先端縁の外径寸
法は上記筒状部材１の自由状態での内径寸法以下にし
て、後述する拡径作業時に、上記各拡径治具３、３の先
端部を上記筒状部材１の内径側に挿入し易くしている。
又、上記各拡径治具３、３の内径寸法は、これら各拡径
治具３、３の内径側に上記ガイド棒４を大きながたつき
なく挿通させる事ができる様に規制している。Each of the diameter expanding jigs 3 and 3 is constructed in a thick-walled cylindrical shape, and has an outer diameter larger than an inner diameter of the cylindrical member 1 in a free state. .
Further, the outer peripheral surface of the tip end portion of each of the diameter expanding jigs 3 and 3 is formed as a conical convex surface 8 which is inclined in a direction in which the outer diameter becomes smaller toward the tip end side. The outer diameter of the tip edge of the conical convex surface 8 is set to be equal to or smaller than the inner diameter of the cylindrical member 1 in the free state, and the tip end of each of the diameter expanding jigs 3, 3 is expanded during the diameter expanding operation described later. The tubular member 1 is easily inserted into the inner diameter side.
Further, the inner diameter of each of the expanding jigs 3 and 3 is regulated so that the guide rod 4 can be inserted into the inside of each of the expanding jigs 3 and 3 without a large rattling. .
【０００７】又、上記ガイド棒４は、外周面に雄ねじを
形成したねじ杆であり、上記各ナット５、５を螺合自在
としている。又、上記各押圧板６、６はそれぞれ、全体
を円輪状に形成しており、外径寸法を上記各拡径治具
３、３の外径寸法よりも大きく（図示の例では、上記各
拡径保持材７、７の外径寸法と同程度に）している。
又、これら各押圧板６、６の内径寸法は、これら各押圧
板６、６の内径側に上記ガイド棒４を大きながたつきな
く挿通させる事ができる様に規制している。又、上記各
拡径保持材７、７は、全体を薄肉円筒状に構成してい
る。この様な各拡径保持材７、７は、上記各拡径治具
３、３にがたつきなく外嵌自在であると共に、外嵌した
状態でこれら各拡径治具３、３の外周面を軸方向に変位
自在である。又、これら各拡径保持材７、７の先端面
は、径方向外方に向かう程軸方向後端側に向かう方向に
傾斜する傾斜面９、９としている。The guide rod 4 is a screw rod having an external thread formed on the outer peripheral surface thereof, and the nuts 5 and 5 can be screwed together. Further, the pressing plates 6 and 6 are formed in a circular ring shape as a whole, and the outer diameter dimension thereof is larger than the outer diameter dimension of the diameter expanding jigs 3 and 3 (in the illustrated example, The outer diameter dimension of the diameter expansion holding members 7, 7 is set to the same level).
Further, the inner diameters of the pressing plates 6 and 6 are regulated so that the guide rod 4 can be inserted into the inner diameter sides of the pressing plates 6 and 6 without a large rattling. In addition, the diameter expansion holding members 7, 7 are formed in a thin-walled cylindrical shape as a whole. Each of the diameter expansion holding members 7 and 7 as described above can be externally fitted to the diameter expansion jigs 3 and 3 without rattling, and the outer circumferences of the diameter expansion jigs 3 and 3 in the externally fitted state. The surface can be displaced in the axial direction. Further, the tip end surfaces of the respective diameter expansion holding members 7 and 7 are inclined surfaces 9 and 9 which incline in the direction toward the rear end side in the axial direction as going outward in the radial direction.
【０００８】上述の様な拡径装置２を使用して前記筒状
部材１の拡径保持作業を行なう場合には、先ず、図７に
示す様に、この筒状部材１の軸方向両側に上記各拡径治
具３、３を、互いの先端面同士を向かい合わせた状態で
配置する。これと共に、これら筒状部材１及び拡径治具
３、３の内径側に、上記ガイド棒４を挿通する。そし
て、このガイド棒４の両端寄り部に螺合させた上記各ナ
ット５、５を、それぞれ上記各拡径治具３、３の基端面
に当接させる。When the diameter expanding and holding work of the cylindrical member 1 is performed using the diameter expanding device 2 as described above, first, as shown in FIG. The diameter expansion jigs 3, 3 are arranged with their front end surfaces facing each other. At the same time, the guide rod 4 is inserted through the inner diameter sides of the tubular member 1 and the diameter expansion jigs 3, 3. Then, the nuts 5 and 5 screwed to the both end portions of the guide rod 4 are brought into contact with the base end surfaces of the diameter expanding jigs 3 and 3, respectively.
【０００９】次いで、上記ガイド棒４を固定しつつ上記
各ナット５、５を回転させるか、或はこれら各ナット
５、５を回転不能に支持しつつ上記ガイド棒４を回転さ
せる事により、これら各ナット５、５をこのガイド棒４
の中央側に向け、互いに近付く様に軸方向移動させる。
尚、この際に上記ガイド棒４を回転させる場合には、何
れか一方のナット５の内周面に形成する雌ねじを逆ねじ
にすると共に、当該ナット５を螺合させる部分で上記ガ
イド棒４の外周面に形成する雄ねじを逆ねじにする。何
れにしても、上述の様に各ナット５、５をガイド棒４の
中央側に向け軸方向移動させる事により、上記各拡径治
具３、３の基端面を押圧する。Next, the nuts 5 and 5 are rotated while the guide rod 4 is fixed, or the guide rod 4 is rotated while the nuts 5 and 5 are non-rotatably supported. Install each nut 5, 5 into this guide rod 4
Axial movement toward the center of the so that they approach each other.
When the guide rod 4 is rotated at this time, the female screw formed on the inner peripheral surface of one of the nuts 5 is reversely threaded, and the guide rod 4 is screwed at the portion where the nut 5 is screwed. The external thread formed on the outer peripheral surface of is a reverse thread. In any case, as described above, the nuts 5 and 5 are axially moved toward the center of the guide rod 4 to press the base end faces of the diameter expanding jigs 3 and 3.
【００１０】そして、この様に各拡径治具３、３の基端
面を押圧する事により、これら各拡径治具３、３の先端
部を上記筒状部材１の内径側に、この筒状部材１の両端
開口から挿入する。そして、図８〜９に示す様に、上記
各拡径治具３、３の先端部に設けた円すい凸面８、８に
より上記筒状部材１の内径を弾性的に広げながら、これ
ら各拡径治具３、３の先半部をこの筒状部材１の内径側
に押し込む。この押し込み作業は、上記図９に示す様
に、上記各拡径治具３、３の先端面同士が上記筒状部材
１の中央部内径側部分で互いに当接するまで行なう。By pressing the base end surfaces of the respective diameter-expanding jigs 3 and 3 in this manner, the tips of the respective diameter-expanding jigs 3 and 3 are brought to the inner diameter side of the tubular member 1. The member 1 is inserted through both openings. Then, as shown in FIGS. 8 to 9, while the inner diameter of the tubular member 1 is elastically widened by the conical convex surfaces 8 and 8 provided at the tip end portions of the respective diameter expansion jigs 3 and 3, the diameter expansion jigs 3 and 3 are expanded. The first half portions of the jigs 3 and 3 are pushed into the inner diameter side of the tubular member 1. As shown in FIG. 9, the pushing operation is performed until the tip surfaces of the diameter expanding jigs 3, 3 come into contact with each other at the inner diameter side portion of the central portion of the tubular member 1.
【００１１】上述の様な各拡径治具３、３の押し込み作
業が完了したならば、次いで、図１０に示す様に、上記
筒状部材１から突出した上記各拡径治具３、３の基半部
に、それぞれ拡径保持材７、７の先半部を外嵌する。こ
れと共に、上記ガイド棒４の両端寄り部周囲に配置した
前記各押圧板６、６の片側面を、上記各拡径保持材７、
７の基端面に当接させる。更に、これら各押圧板６、６
の他側面に上記各ナット５、５を当接させる。When the pushing-in operation of the diameter expanding jigs 3 and 3 as described above is completed, then, as shown in FIG. 10, the diameter expanding jigs 3 and 3 projecting from the tubular member 1 are next. The first half portions of the diameter expansion holding members 7, 7 are externally fitted to the base half portions of the above. At the same time, one side surface of each of the pressing plates 6, 6 arranged around both ends of the guide rod 4 is connected to each of the diameter expansion holding members 7,
It is brought into contact with the base end surface of 7. Further, these pressing plates 6 and 6
The nuts 5 and 5 are brought into contact with the other side surface.
【００１２】そして、この状態で、前述の様にして上記
各ナット５、５を上記ガイド棒４の中央側に向け軸方向
移動させる事により、上記各拡径保持材７、７の基端面
を、上記各押圧板６、６を介して押圧する。これによ
り、図１１に示す様に、上記各拡径保持材７、７の先端
側部分を、上記各拡径治具３、３の外周面と上記筒状部
材１の内周面との間に、この筒状部材１の内径を前記各
傾斜面９、９により弾性的に広げつつ押し込む。この様
な押し込み作業は、上記図１１に示す様に、上記各拡径
保持材７、７の先端縁同士が上記筒状部材１の中央部内
径側部分で互いに当接するまで行なう。そして、最後
に、図１２に示す様に、上記各拡径保持材７、７の内径
側から、上記ガイド棒４と上記各拡径治具３、３とを抜
き取る。この状態で、上記各拡径保持材７、７により、
上記筒状部材１の拡径状態が保持される。尚、この筒状
部材１の設置作業を行なう際に、この筒状部材１の内径
側から上記各拡径保持材７、７を抜き取る場合には、こ
れら各拡径保持材７、７を軸方向反対側に引っ張る。Then, in this state, the nuts 5 and 5 are axially moved toward the center of the guide rod 4 as described above, whereby the base end faces of the diameter expansion holding members 7 and 7 are moved. , The pressing plates 6, 6 are pressed. As a result, as shown in FIG. 11, the tip end side portion of each of the diameter expansion holding members 7, 7 is provided between the outer peripheral surface of each of the diameter expansion jigs 3, 3 and the inner peripheral surface of the tubular member 1. Then, the inner diameter of the tubular member 1 is elastically spread by the inclined surfaces 9 and 9 and pushed in. As shown in FIG. 11, such a pushing operation is carried out until the tip edges of the expanded diameter holding members 7, 7 come into contact with each other at the central inner diameter side portion of the tubular member 1. Finally, as shown in FIG. 12, the guide rod 4 and the diameter-expanding jigs 3 and 3 are pulled out from the inner diameter side of the diameter-expansion holding members 7 and 7. In this state, by the diameter expansion holding members 7 and 7,
The expanded state of the tubular member 1 is maintained. When the cylindrical member 1 is installed, when the expansion holding members 7, 7 are pulled out from the inner diameter side of the cylindrical member 1, the expansion holding members 7, 7 are used as shafts. Pull in the opposite direction.
【００１３】上述した様な先発明の場合には、拡径装置
２を比較的簡単な構造にできる為、この拡径装置２の製
造コストを低減できる。又、上記筒状部材１を拡径する
為の部材として、軸方向に二分割されているもの、即
ち、１対の拡径治具３、３（及び１対の拡径保持材７、
７）を使用している。そして、これら１対の拡径治具
３、３（及び１対の拡径保持材７、７）を上記筒状部材
１の内径側に、この筒状部材１の両端開口から押し込む
様にしている。この為、単一の拡径用部材を上記筒状部
材１の内径側に、この筒状部材１の全長に亙り押し込む
場合に比べて、押し込みの際の摩擦抵抗力の最大値を半
分以下にできる。従って、この筒状部材１の拡径作業の
容易化を図れる。又、同様に、上記１対の拡径保持材
７、７を上記筒状部材１の内径側から抜き取る際の摩擦
抵抗力を小さくできる為、この筒状部材１の設置作業の
容易化も図れる。In the case of the prior invention as described above, since the diameter expanding device 2 can have a relatively simple structure, the manufacturing cost of the diameter expanding device 2 can be reduced. A member for expanding the diameter of the tubular member 1 is divided into two parts in the axial direction, that is, a pair of expanding jigs 3 and 3 (and a pair of expanding members 7,
7) is used. Then, the pair of diameter-expanding jigs 3 and 3 (and the pair of diameter-expanding holding members 7 and 7) are pushed into the inner diameter side of the tubular member 1 from both end openings of the tubular member 1. There is. For this reason, the maximum value of the frictional resistance force at the time of pushing is reduced to half or less as compared with the case where a single diameter-expanding member is pushed into the inner diameter side of the tubular member 1 over the entire length of the tubular member 1. it can. Therefore, the work of expanding the diameter of the tubular member 1 can be facilitated. Similarly, since the frictional resistance force when the pair of expanded-diameter holding members 7, 7 is pulled out from the inner diameter side of the tubular member 1 can be reduced, the installation work of the tubular member 1 can be facilitated. .
【００１４】尚、前述の図１０〜１１に示す様に、上記
各拡径保持材７、７を上記各拡径治具３、３の外周面と
上記筒状部材１の内周面との間に押し込む際に、これら
各拡径保持材７、７の外周面と筒状部材１の内周面との
接触部に働く摩擦抵抗力が大きく、押し込み力が過大と
なる場合には、図１３〜１６に示す様に、１乃至複数本
のガイドロッド１２、１２を使用して、この押し込み力
を低減させる事ができる。即ち、前述の図９に示す様
に、上記筒状部材１の内径側に上記各拡径治具３、３の
先端側部分を押し込んだ後、図１３〜１４に示す様に、
これら各拡径治具３、３の外周面と上記筒状部材１の内
周面との間に、この筒状部材１の両端開口からそれぞれ
１乃至複数本（図示の例では４本）ずつのガイドロッド
１２、１２を押し込む。これら各ロッド１２、１２は、
図１３（Ｂ）及び図１４（Ｂ）に示す様に、円周方向に
関してほぼ等間隔に配置する。尚、これら各ガイドロッ
ド１２、１２の表面と上記筒状部材１の内周面及び上記
各拡径治具３、３の外周面との接触面積は小さい、即
ち、これら各接触部に働く摩擦力は小さい為、上記各ガ
イドロッド１２、１２の押し込み作業は比較的小さい力
で行なえる。又、この様に上記各拡径治具３、３の外周
面と上記筒状部材１の内周面との間に上記各ガイドロッ
ド１２、１２を押し込んだ結果、図１３（Ｂ）及び図１
４（Ｂ）に示す様に、これら各ガイドロッド１２、１２
の円周方向両側部分に、それぞれ隙間が生じる。It should be noted that, as shown in FIGS. 10 to 11, the diameter expansion holding members 7, 7 are formed on the outer peripheral surfaces of the diameter expansion jigs 3, 3 and the inner peripheral surface of the tubular member 1, respectively. When pushing in between, when the frictional resistance force acting on the contact portion between the outer peripheral surface of each of the expanded diameter holding members 7, 7 and the inner peripheral surface of the tubular member 1 is large and the pushing force becomes excessive, As shown by 13 to 16, one or a plurality of guide rods 12 and 12 can be used to reduce the pushing force. That is, as shown in FIG. 9 described above, after pushing the distal end side portions of the diameter expanding jigs 3 and 3 into the inner diameter side of the tubular member 1, as shown in FIGS.
Between the outer peripheral surface of each of the diameter-expanding jigs 3 and 3 and the inner peripheral surface of the tubular member 1, one to a plurality (four in the illustrated example) from the openings at both ends of the tubular member 1, respectively. Push in the guide rods 12, 12. Each of these rods 12, 12 is
As shown in FIGS. 13B and 14B, they are arranged at substantially equal intervals in the circumferential direction. The contact area between the surface of each of the guide rods 12, 12 and the inner peripheral surface of the tubular member 1 and the outer peripheral surface of each of the diameter expanding jigs 3, 3 is small, that is, the friction acting on each contact portion is small. Since the force is small, the pushing operation of the guide rods 12, 12 can be performed with a comparatively small force. In addition, as a result of pushing the guide rods 12, 12 between the outer peripheral surface of each of the diameter expanding jigs 3 and 3 and the inner peripheral surface of the tubular member 1 as described above, FIG. 1
As shown in FIG. 4 (B), each of these guide rods 12, 12
A gap is formed on each of both sides in the circumferential direction.
【００１５】上述の様に複数のガイドロッド１２、１２
を押し込んだならば、次いで、図１５〜１６に示す様
に、上記各拡径治具３、３の外周面と上記各ガイドロッ
ド１２、１２との間に、上記筒状部材１の両端開口から
それぞれ拡径保持材７、７を押し込む。この際、図１６
（Ｂ）に示す様に、上記各ガイドロッド１２、１２が存
在する部分及びその円周方向両側部分で、上記各拡径保
持材７、７の外周面と上記筒状部材１の内周面とが接触
しない為、これら各拡径保持材７、７の外周面とこの筒
状部材１の内周面との接触面積を小さくできる。又、上
記各ガイドロッド１２、１２と上記各拡径保持材７、７
とは、何れもゴム以外の滑り易い材料により造れるの
で、これら両部材１２、７同士の接触部に働く摩擦係数
は小さい。この結果、上記各拡径保持材７、７に関する
各接触部に働く摩擦力を小さくでき、これら各拡径保持
材７、７の押し込みに要する力を小さくできる。As described above, the plurality of guide rods 12, 12
Then, as shown in FIGS. 15 to 16, the both end openings of the tubular member 1 are provided between the outer peripheral surfaces of the diameter expanding jigs 3 and 3 and the guide rods 12 and 12. Then, the diameter expansion holding members 7, 7 are respectively pushed in. At this time, FIG.
As shown in (B), the outer peripheral surface of each of the diameter expansion holding members 7, 7 and the inner peripheral surface of the tubular member 1 at the portion where each of the guide rods 12, 12 is present and at both circumferential portions thereof. Since the and are not in contact with each other, the contact area between the outer peripheral surface of each of the diameter expansion holding members 7, 7 and the inner peripheral surface of the tubular member 1 can be reduced. In addition, the guide rods 12 and 12 and the expanded diameter holding members 7 and 7
Since any of them can be made of a slippery material other than rubber, the coefficient of friction acting on the contact portion between these two members 12, 7 is small. As a result, it is possible to reduce the frictional force acting on each contact portion related to the diameter expansion holding members 7 and 7, and to reduce the force required to push in the diameter expansion holding members 7 and 7.
【００１６】尚、上述した例では、上記筒状部材１の内
径側に、上記１対の拡径治具３、３と上記１対の拡径保
持材７、７とを順番に押し込んだが、これら各拡径治具
３、３と各拡径保持材７、７とは、互いに同心に組み合
わせた状態で上記筒状部材１の内径側に同時に押し込む
事もできる。又、上述した先発明を実施する場合、１対
の拡径治具３、３（及び１対の拡径保持材７、７）の外
径を互いに異ならせれば、上記筒状部材１の拡径量を軸
方向両側で互いに異ならせる事ができる。この様に筒状
部材１の拡径量を軸方向両側で異ならせれば、この筒状
部材１の内径側に設置する部材の径寸法がこの筒状部材
１の軸方向両側で異なる場合（例えば、この筒状部材１
の内径側に異径ケーブル同士の直線接続部を設置する場
合）でも、この筒状部材１の設置作業を効率良く行なえ
る。又、上記各拡径治具３、３及び上記各拡径保持材
７、７及び前記各押圧板６、６は、それぞれ複数の部分
円筒状若しくは部分円輪状の素子同士を互いに分離可能
に組み合わせて構成する事により、組み付けの容易化を
図る事もできる。In the above-mentioned example, the pair of diameter-expanding jigs 3, 3 and the pair of diameter-expanding holding members 7, 7 are sequentially pushed into the inner diameter side of the tubular member 1, but The diameter expanding jigs 3 and 3 and the diameter expanding holding members 7 and 7 can be simultaneously pushed into the inner diameter side of the tubular member 1 in a state where they are concentrically combined with each other. Further, when carrying out the above-mentioned prior invention, if the outer diameters of the pair of diameter expansion jigs 3 and 3 (and the pair of diameter expansion holding members 7 and 7) are made different from each other, the expansion of the tubular member 1 is performed. The diameter can be different on both sides in the axial direction. In this way, if the diameter expansion amount of the tubular member 1 is made different on both sides in the axial direction, if the diameter dimension of the member installed on the inner diameter side of the tubular member 1 is different on both sides in the axial direction of the tubular member 1 (for example, , This tubular member 1
Even in the case of installing a straight connecting portion between cables having different diameters on the inner diameter side, the installation work of the tubular member 1 can be efficiently performed. Further, each of the diameter expansion jigs 3, 3 and each of the diameter expansion holding members 7, 7 and each of the pressing plates 6, 6 are combined such that a plurality of partially cylindrical or partially annular elements can be separated from each other. It is also possible to facilitate the assembling by using this configuration.
【００１７】[0017]
【発明が解決しようとする課題】上述した先発明の場合
には、拡径寸法の異なる筒状部材１毎に、外径寸法の異
なる拡径治具３、３及び拡径保持材７、７を備えた拡径
装置２を用意する必要がある。これに対し、上記筒状部
材１の拡径保持作業をより効率良く行なう為には、この
筒状部材１の拡径寸法に拘らず、１つの拡径装置で拡径
保持作業を行なえる様にする事が望ましい。本発明の弾
性材製筒状部材の拡径保持方法及び拡径装置は、上述の
様な事情に鑑みて発明したものである。In the case of the above-mentioned prior invention, the diameter-expanding jigs 3 and 3 and the diameter-expanding holding members 7 and 7 having different outer diameters are provided for the respective cylindrical members 1 having different diameter expansions. It is necessary to prepare the diameter expanding device 2 provided with. On the other hand, in order to perform the diameter expansion holding work of the tubular member 1 more efficiently, the diameter expansion holding work can be performed by one diameter expanding device regardless of the diameter expansion size of the tubular member 1. It is desirable to The method for maintaining the expansion of the tubular member made of an elastic material and the expansion device of the present invention are invented in view of the above circumstances.
【００１８】[0018]
【課題を解決するための手段】本発明の弾性材製筒状部
材の拡径保持方法及び拡径装置のうち、請求項１〜２に
記載した弾性材製筒状部材の拡径保持方法は、弾性材に
より全体を円筒状に構成された筒状部材の内径を弾性的
に広げると共に、この筒状部材の内径が弾性的に広がっ
た状態を保持する方法である。このうち、請求項１に記
載した弾性材製筒状部材の拡径保持方法は、それぞれの
径寸法が互いに異なる複数の筒状素子同士を互いに同心
に且つ軸方向の相対変位可能に組み合わせて成ると共
に、これら複数の筒状素子の中から選択した何れかの筒
状素子を最外層の筒状素子とする事によりその外径寸法
を多段階に調節自在とした拡径治具を、１対用意する。
そして、これら各拡径治具を構成する複数の筒状素子の
中から拡径すべき上記筒状部材の内径寸法に見合った外
径寸法を有する筒状素子を選択し、当該筒状素子を上記
各拡径治具を構成する最外層の筒状素子とする。そし
て、この状態で、これら各拡径治具を上記筒状部材の内
径側に、それぞれこの筒状部材の両端開口から押し込む
事により、この筒状部材の内径を弾性的に広げる。その
後、上記各拡径治具とも、上記最外層の筒状素子以外の
筒状素子を上記筒状部材の内径側から抜き取って、これ
ら各最外層の筒状素子により上記筒状部材の内径を弾性
的に広げた状態を保持する。Among the method and the apparatus for expanding the diameter of the tubular member made of an elastic material of the present invention, the method for expanding and holding the tubular member made of an elastic material described in claims 1 and 2 is A method is to elastically widen the inner diameter of a tubular member which is made of an elastic material and has a cylindrical shape as a whole, and to keep the inner diameter of the tubular member elastically widened. Among these, the method for expanding and retaining an elastic material cylindrical member according to claim 1 is configured by combining a plurality of cylindrical elements having different diameters so as to be concentric with each other and capable of relative axial displacement. At the same time, a pair of diameter-expanding jigs whose outer diameter dimension can be adjusted in multiple stages by making one of the tubular elements selected from the plurality of tubular elements the tubular element of the outermost layer. prepare.
Then, a tubular element having an outer diameter dimension corresponding to the inner diameter dimension of the tubular member to be expanded is selected from among the plurality of cylindrical elements forming each of the diameter expansion jigs, and the tubular element is The outermost cylindrical element that constitutes each of the diameter expanding jigs is used. Then, in this state, the respective diameter-expanding jigs are pushed into the inner diameter side of the tubular member from the openings at both ends of the tubular member, thereby elastically expanding the inner diameter of the tubular member. Thereafter, with each of the diameter expanding jigs, tubular elements other than the tubular element of the outermost layer are extracted from the inner diameter side of the tubular member, and the inner diameter of the tubular member is adjusted by the tubular element of each outermost layer. Holds the elastically spread state.
【００１９】又、請求項２に記載した弾性材製筒状部材
の拡径保持方法は、請求項１に記載した方法を実施した
後、上記各最外層の筒状素子の内径側に、その外径寸法
が筒状部材の自由状態での内径寸法よりも大きい拡径保
持材を挿通する。次いで、上記各最外層の筒状素子を上
記筒状部材の内径側から抜き取る事により、この筒状部
材を上記拡径保持材に弾性的に外嵌させる事で、この筒
状部材の内径を弾性的に広げた状態を保持する。According to a second aspect of the present invention, the method for holding the expanded diameter of the tubular member made of an elastic material is performed on the inner diameter side of the tubular element of each outermost layer after performing the method described in the first aspect. A diametrical expansion holding material having an outer diameter larger than the inner diameter of the tubular member in the free state is inserted. Then, by pulling out the tubular element of each outermost layer from the inner diameter side of the tubular member, by elastically fitting the tubular member to the expanded diameter holding member, the inner diameter of the tubular member is increased. Holds the elastically spread state.
【００２０】又、請求項３に記載した弾性材製筒状部材
の拡径装置は、１対の拡径治具と、ガイド棒と、押圧手
段とを備える。このうちの１対の拡径治具はそれぞれ、
弾性材により全体を円筒状に構成した筒状部材の自由状
態での内径寸法よりも大きい外径寸法を有し、この筒状
部材の内径側にそれぞれこの筒状部材の両端開口から押
し込む事により、この筒状部材の内径を弾性的に広げる
事が可能である。本発明の場合、この様な１対の拡径治
具はそれぞれ、それぞれの径寸法が互いに異なる複数の
筒状素子同士を互いに同心に且つ軸方向の相対変位可能
に組み合わせて成ると共に、これら複数の筒状素子の中
から選択した何れかの筒状素子を最外層の筒状素子とす
る事によりその外径寸法を多段階に調節自在である。
又、上記ガイド棒は、上記各拡径治具及び筒状部材の中
心孔に挿通自在である。又、上記押圧手段は、上記各拡
径治具の基端面を押圧自在である。The diameter expanding device for a cylindrical member made of an elastic material according to claim 3 comprises a pair of diameter expanding jigs, a guide rod, and a pressing means. Of these, a pair of expanding jigs,
By having an outer diameter dimension that is larger than the inner diameter dimension of the tubular member that is made entirely of a cylindrical shape with an elastic material in the free state, and pushing it into the inner diameter side of this tubular member from both end openings of this tubular member. It is possible to elastically expand the inner diameter of this tubular member. In the case of the present invention, such a pair of diameter-expanding jigs are each formed by combining a plurality of tubular elements having different diameters so as to be concentric with each other and relatively displaceable in the axial direction. The outer diameter of the tubular element can be adjusted in multiple stages by making any of the tubular elements selected from among the tubular elements as the outermost tubular element.
Further, the guide rod can be inserted into the diameter-expanding jigs and the central hole of the tubular member. Further, the pressing means can press the base end surface of each of the diameter expanding jigs.
【００２１】[0021]
【作用】上述の様な本発明の弾性材製筒状部材の拡径保
持方法及び拡径装置の場合、拡径すべき弾性材製筒状部
材の拡径寸法（所望とする拡径後の内径寸法）に合わせ
て、１対の拡径治具を構成する最外層の筒状素子を選択
する事により、当該弾性材製筒状部材の拡径保持作業を
適切に行なえる。この様に本発明の場合には、拡径すべ
き弾性材製筒状部材の拡径寸法に拘らず、この弾性材製
筒状部材の拡径保持作業を１つの拡径装置により適切に
行なえる。この為、この拡径装置のコスト低減と、拡径
保持作業の能率化とを図れる。In the case of the method for expanding the diameter of the tubular member made of an elastic material and the expanding device of the present invention as described above, the diameter expansion dimension of the tubular member made of an elastic material to be expanded (after the desired expansion) By selecting the outermost tubular element that constitutes the pair of diameter-expanding jigs in accordance with the inner diameter dimension), it is possible to appropriately perform the diameter-expansion holding operation of the elastic tubular member. Thus, in the case of the present invention, regardless of the diameter expansion dimension of the elastic material tubular member to be expanded, the diameter expansion holding work of this elastic material tubular member can be appropriately performed by one diameter expansion device. It Therefore, it is possible to reduce the cost of the diameter expanding device and improve the efficiency of the diameter expanding holding work.
【００２２】[0022]
【発明の実施の形態】図１〜６は、本発明の実施の形態
の１例を示している。尚、本例の拡径装置２ａの構造上
の特徴は、１対の拡径治具３ａ、３ａを多重管構造にし
た点にある。その他の基本構造に就いては、前述の図７
〜１２に示した先発明の拡径装置２とほぼ同様である。
この為、同等部分には同一符号を付して、重複する説明
を省略若しくは簡略にし、以下、本発明の特徴部分並び
に前述した先発明と異なる部分を中心に説明する。1 to 6 show an example of an embodiment of the present invention. The structural feature of the diameter-expanding device 2a of this example is that the pair of diameter-expanding jigs 3a and 3a have a multi-tube structure. For other basic structures, see FIG.
This is almost the same as the diameter expansion device 2 of the previous invention shown in FIGS.
Therefore, the same parts are designated by the same reference numerals to omit or simplify the overlapping description, and hereinafter, the characteristic parts of the present invention and the parts different from the above-mentioned prior invention will be mainly described.
【００２３】本例の場合、上記各拡径治具３ａ、３ａは
それぞれ、上記先発明の拡径装置２に組み込む拡径治具
３、３と同様の外形を有する。即ち、上記各拡径治具３
ａ、３ａはそれぞれ、全体を円筒状に構成すると共に、
先端部外周面を、先端側に向かう程外径が小さくなる方
向に傾斜する円すい凸面８としている。特に、本例の場
合、上記各拡径治具３ａ、３ａはそれぞれ、それぞれの
径寸法が互いに異なる複数の円筒状素子１０ａ〜１０ｄ
同士を互いに同心に、且つ、軸方向の相対変位可能に組
み合わせて成る。尚、この様に複数の円筒状素子１０ａ
〜１０ｄ同士を互いに組み合わせて上記各拡径治具３
ａ、３ａを構成した状態で、これら各拡径治具３ａ、３
ａの先端部外周面に上記円すい凸面８が形成される様
に、上記各円筒状素子１０ａ〜１０ｄの先端部の形状を
規制している。又、この様に構成する上記各拡径治具３
ａ、３ａはそれぞれ、上記複数の円筒状素子１０ａ〜１
０ｄの中から選択した何れかの円筒状素子を最外層の円
筒状素子とする事により、その外径寸法を多段階に調節
自在である。In the case of this example, the diameter expanding jigs 3a, 3a have the same outer shape as the diameter expanding jigs 3, 3 incorporated in the diameter expanding device 2 of the previous invention. That is, each of the diameter expanding jigs 3
a and 3a each have a cylindrical shape as a whole,
The outer peripheral surface of the tip portion is a conical convex surface 8 that is inclined in a direction in which the outer diameter becomes smaller toward the tip side. Particularly, in the case of this example, each of the diameter expanding jigs 3a and 3a has a plurality of cylindrical elements 10a to 10d having different diameters.
They are formed by combining them concentrically with each other and allowing relative displacement in the axial direction. In addition, in this way, a plurality of cylindrical elements 10a
Each of the above-mentioned diameter expansion jigs 3 by combining 10 to 10d with each other
a, 3a, these diameter expansion jigs 3a, 3a
The shapes of the tip portions of the cylindrical elements 10a to 10d are regulated so that the conical convex surface 8 is formed on the outer peripheral surface of the tip portion of a. Further, each of the above-mentioned diameter expansion jigs 3 configured in this way
a and 3a are the plurality of cylindrical elements 10a to 1 respectively.
By setting any of the cylindrical elements selected from 0d as the outermost cylindrical element, the outer diameter dimension can be adjusted in multiple stages.
【００２４】上述の様な１対の拡径治具３ａ、３ａを含
んで構成する本例の拡径装置２ａを使用して、弾性材製
の筒状部材１の拡径保持作業を行なう場合には、先ず、
上記各拡径治具３ａ、３ａを構成する複数の円筒状素子
１０ａ〜１０ｄの中から、上記筒状部材１の拡径寸法
（所望とする拡径後の内径寸法）に見合った外形寸法を
有する円筒状素子（本例では、円筒状素子１０ｄ）を選
択する。そして、当該円筒状素子１０ｄを、上記各拡径
治具３ａ、３ａの最外層の円筒状素子とする。In the case where the expanding member 2a of the present embodiment, which includes a pair of expanding jigs 3a, 3a as described above, is used for expanding and holding the cylindrical member 1 made of an elastic material. First,
Out of the plurality of cylindrical elements 10a to 10d constituting each of the diameter expanding jigs 3a, 3a, the outer dimension corresponding to the diameter expanding dimension of the tubular member 1 (the desired inner diameter dimension after the diameter expansion) is selected. The cylindrical element to have (in this example, the cylindrical element 10d) is selected. And the said cylindrical element 10d is made into the cylindrical element of the outermost layer of each said diameter expansion jig 3a, 3a.
【００２５】そして、この様に構成した各拡径治具３
ａ、３ａを、図１に示す様に、これら各拡径治具３ａ、
３ａを互いの先端面同士を互いに向かい合わせた状態
で、上記筒状部材１の軸方向両側に配置する。これと共
に、これら筒状部材１及び拡径治具３ａ、３ａの内径側
に、ねじ杆であるガイド棒４を挿通する。そして、この
ガイド棒４の両端寄り部周囲に配置した円輪状の押圧板
６、６の片側面を、それぞれ上記各拡径治具３ａ、３ａ
の基端面に当接させると共に、上記ガイド棒４の両端寄
り部に螺合させたナット５、５を、それぞれ上記各押圧
板６、６の他側面に当接させる。The diameter expanding jigs 3 thus constructed are
a and 3a, as shown in FIG.
3a are arranged on both sides in the axial direction of the tubular member 1 with their front end surfaces facing each other. At the same time, the guide rod 4, which is a screw rod, is inserted through the inner diameter sides of the tubular member 1 and the diameter-expanding jigs 3a, 3a. Then, one side surfaces of the circular ring-shaped pressing plates 6, 6 arranged around the portions near the both ends of the guide rod 4 are respectively connected to the diameter expanding jigs 3a, 3a.
And the nuts 5 and 5 screwed into the end portions of the guide rod 4 are brought into contact with the other side surfaces of the pressing plates 6 and 6, respectively.
【００２６】次いで、前述した先発明の場合と同様にし
て、上記各ナット５、５を上記ガイド棒４の中央側に向
け、互いに近付く様に軸方向移動させる事により、上記
各拡径治具３ａ、３ａの基端面を、上記各押圧板６、６
を介して押圧する。これにより、これら各拡径治具３
ａ、３ａの先端部を上記筒状部材１の内径側に、この筒
状部材１の両端開口から挿入する。そして、図２〜３に
示す様に、上記各拡径治具３ａ、３ａの先端部に設けた
円すい凸面８、８により上記筒状部材１の内径を弾性的
に広げながら、これら各拡径治具３ａ、３ａの先半部を
この筒状部材１の内径側に押し込む。この押し込み作業
は、上記図３に示す様に、上記各拡径治具３ａ、３ａの
先端面、即ち、最も内径側に位置する円筒状素子１０
ａ、１０ａの先端面同士が上記筒状部材１の中央部内径
側部分で互いに当接するまで行なう。Then, in the same manner as in the case of the above-mentioned invention, the nuts 5 and 5 are directed toward the center of the guide rod 4 and axially moved so as to approach each other, whereby the diameter expansion jigs described above. The base end faces of 3a and 3a are connected to the pressing plates 6 and 6 described above.
Press through. Thereby, each of these diameter expansion jigs 3
The distal ends of a and 3a are inserted into the inner diameter side of the tubular member 1 through the openings at both ends of the tubular member 1. Then, as shown in FIGS. 2 to 3, while the inner diameter of the tubular member 1 is elastically widened by the conical convex surfaces 8 and 8 provided at the tip ends of the respective diameter expansion jigs 3a and 3a, the respective diameter expansions The first half of the jigs 3a, 3a is pushed into the inner diameter side of the tubular member 1. As shown in FIG. 3, this pushing operation is performed by the cylindrical element 10 located at the tip end surface of each of the diameter expanding jigs 3a, 3a, that is, the innermost diameter side.
It is performed until the tip surfaces of a and 10a come into contact with each other at the inner diameter side portion of the central portion of the tubular member 1.
【００２７】次いで、上記各拡径治具３ａ、３ａを構成
する最外層の円筒状素子１０ｄ、１０ｄの基端面と上記
各押圧板６、６の片側面との間に、それぞれこれら各円
筒状素子１０ｄ、１０ｄと径寸法が等しい円筒状の押込
用スリーブ１１、１１を配置する（図４参照）。尚、こ
の様な各押込用スリーブ１１、１１の配置作業は、これ
ら各押込用スリーブ１１、１１を一体品とする場合に
は、上記ガイド棒４の両端部周囲から、一旦、上記各ナ
ット５、５及び上記各押圧板６、６を取り外して行な
う。これに対し、上記各押込用スリーブ１１、１１を複
数の部分円筒状の素子（例えば、１対の半円筒状の素
子）同士を互いに分離可能に組み合わせて構成する場合
には、上記ガイド棒４の両端部周囲に上記各ナット５、
５及び上記各押圧板６、６を取り付けたまま行なえる。Next, between the base end faces of the cylindrical elements 10d, 10d of the outermost layer constituting each of the diameter expanding jigs 3a, 3a and one side surface of each of the pressing plates 6, 6, these cylindrical shapes are respectively formed. Cylindrical pushing sleeves 11, 11 having the same diameter as the elements 10d, 10d are arranged (see FIG. 4). It should be noted that, when the pushing sleeves 11 and 11 are integrated as described above, when the pushing sleeves 11 and 11 are integrally formed, the nuts 5 are temporarily pushed from around the both ends of the guide rod 4. 5 and the pressing plates 6 and 6 are removed. On the other hand, when the pushing sleeves 11 and 11 are formed by combining a plurality of partially cylindrical elements (for example, a pair of semi-cylindrical elements) so as to be separable from each other, the guide rod 4 is used. Around the both ends of the above nuts 5,
5 and the above-mentioned pressing plates 6 and 6 can be carried out while being attached.
【００２８】何れにしても、上述の様に各押込用スリー
ブ１１、１１を上記各最外層の円筒状素子１０ｄ、１０
ｄの基端面と上記各押圧板６、６の片側面との間に配置
したならば、上記各ナット５、５を上記ガイド棒４の中
央部に向け、互いに近付く様に軸方向移動させる事によ
り、上記各最外層の円筒状素子１０ｄ、１０ｄの基端面
を、上記各押込用スリーブ１１、１１を介して押圧す
る。これにより、図４に示す様に、上記各最外層の円筒
状素子１０ｄ、１０ｄを上記筒状部材１の奥に向け更に
押し込み、これら両円筒状素子１０ｄ、１０ｄの先端縁
同士を、上記筒状素子１の中央部内径側部分で当接させ
る。In any case, as described above, the pressing sleeves 11 and 11 are connected to the outermost cylindrical elements 10d and 10 respectively.
If the nuts 5 and 5 are arranged between the base end surface of d and one side surface of each of the pressing plates 6 and 6, the nuts 5 and 5 are axially moved so as to approach each other toward the center of the guide rod 4. Thus, the base end faces of the outermost cylindrical elements 10d and 10d are pressed through the pressing sleeves 11 and 11. As a result, as shown in FIG. 4, the outermost cylindrical elements 10d and 10d are further pushed toward the inner side of the tubular member 1 so that the tip edges of the cylindrical elements 10d and 10d are connected to each other. The element 1 is brought into contact with the inner diameter side portion of the central portion.
【００２９】そして、最後に、図５に示す様に、上記各
最外層の円筒状素子１０ｄ、１０ｄの内径側から、これ
ら最外層の円筒状素子１０ｄ、１０ｄの径方向内方に存
在する各円筒状素子１０ａ〜１０ｃと上記ガイド棒４と
を抜き取る。この状態で、上記各最外層の円筒状素子１
０ｄ、１０ｄにより、上記筒状部材１の拡径状態が保持
される。この筒状部材１の設置作業を行なう際に、この
筒状部材１の内径側から上記各最外層の円筒状素子１０
ｄ、１０ｄを抜き取る場合には、これら各最外層の円筒
状素子１０ｄ、１０ｄを軸方向反対側に引っ張る。Finally, as shown in FIG. 5, the outermost cylindrical elements 10d and 10d are located radially inward of the outermost cylindrical elements 10d and 10d. The cylindrical elements 10a to 10c and the guide rod 4 are pulled out. In this state, the outermost cylindrical element 1
The expanded state of the tubular member 1 is maintained by 0d and 10d. When this cylindrical member 1 is installed, the cylindrical elements 10 of the outermost layers are arranged from the inner diameter side of the cylindrical member 1.
When removing d and 10d, the cylindrical elements 10d and 10d of the outermost layers are pulled to the opposite sides in the axial direction.
【００３０】尚、上述の様に、最外層の円筒状素子１０
ｄ、１０ｄを上記筒状部材１の拡径保持材として使用す
る代わりに、例えば図６に示す様な別構造の拡径保持材
１３（外形寸法が上記筒状部材１の自由状態での内径寸
法よりも大きいもの）を使用する事もできる。この様な
別構造の拡径保持材１３を使用する場合には、図５に示
した状態で、上記最外層の円筒状素子１０ｄ、１０ｄの
内径側に上記別構造の拡径保持材１３を挿通する。そし
て、この状態で、上記各最外層の円筒状素子１０ｄ、１
０ｄを上記筒状部材１の内径側から抜き取る。この結
果、この筒状部材１が自身の弾性により縮径し、この筒
状部材１が上記別構造の拡径保持材１３の外周面に弾性
的に外嵌される。尚、図６に例示した別構造の拡径保持
材１３は、線材１４をスパイラル状に巻回して成る、周
知構造のものである。As mentioned above, the outermost cylindrical element 10 is used.
Instead of using d and 10d as the diameter expansion holding material for the tubular member 1, for example, the diameter expansion holding material 13 having a different structure as shown in FIG. Larger than the size) can also be used. In the case of using the expansion holding material 13 having such a different structure, the expansion holding material 13 having the different structure is provided on the inner diameter side of the outermost cylindrical elements 10d and 10d in the state shown in FIG. Insert it. In this state, the outermost cylindrical elements 10d, 1
0d is pulled out from the inner diameter side of the tubular member 1. As a result, the diameter of the tubular member 1 is reduced by its own elasticity, and the tubular member 1 is elastically fitted onto the outer peripheral surface of the diameter expansion holding member 13 having the different structure. The expanded diameter holding member 13 having another structure illustrated in FIG. 6 has a well-known structure in which a wire 14 is wound in a spiral shape.
【００３１】上述した様な本例の弾性材製筒状部材の拡
径保持方法及び拡径装置の場合、拡径すべき筒状部材１
の拡径寸法に合わせて、１対の拡径治具３ａ、３ａを構
成する最外層の円筒状素子（１０ａ〜１０ｄ、更には１
０ｄよりも外径側に設置する、図示しない円筒状素子）
を選択する事により、当該筒状部材１の拡径保持作業を
適切に行なえる。この様に本例の場合には、拡径すべき
筒状部材１の拡径寸法の相違に拘らず、この筒状部材１
の拡径保持作業を同一の拡径装置２ａにより適切に行な
える。この為、この拡径装置２ａのコスト低減と、拡径
保持作業の能率化とを図れる。In the case of the method for expanding the diameter of the cylindrical member made of an elastic material and the expanding device of the embodiment as described above, the cylindrical member 1 to be expanded in diameter is used.
The outermost cylindrical element (10a to 10d, further 1
(Cylindrical element (not shown) installed on the outer diameter side than 0d)
By selecting, the diameter expansion holding work of the tubular member 1 can be appropriately performed. As described above, in the case of this example, the tubular member 1 is to be expanded regardless of the difference in the diameter expansion dimension of the tubular member 1.
The diameter expansion holding work can be properly performed by the same diameter expansion device 2a. Therefore, it is possible to reduce the cost of the diameter expanding device 2a and improve the efficiency of the diameter expansion holding work.
【００３２】尚、上述した実施の形態の様に、上記筒状
部材１の内径側に上記各拡径治具３ａ、３ａをそれぞれ
一度に（これら各拡径治具３ａ、３ａを構成する総ての
円筒状素子を一遍に）押し込む様にすると、例えば上記
筒状部材１の自由状態での内径寸法と拡径後の内径寸法
との差が大きい等の場合に、上記各拡径治具３ａ、３ａ
に付与すべき押し込み力が過度に大きくなる場合があ
る。この様な場合、上記各拡径治具３ａ、３ａを構成す
る複数の円筒状素子１０ａ〜１０ｄを、数段階に分けて
（外径の小さい円筒状素子から順番に）上記筒状部材１
の内径側に押し込む様にすれば、付与すべき押し込み力
を低減する事ができる。尚、この様に複数の円筒状素子
１０ａ〜１０ｄを数段階に分けて筒状部材１の内径側に
押し込む場合、前述の図１３〜１６に示した様な複数の
ガイドロッド１２、１２を使用する押し込み方法を実施
すれば、押し込み力の更なる低減を図れる。又、上記各
円筒状素子１０ａ〜１０ｄの外周面に軸方向に亙る溝
を、１乃至複数本形成すれば、これら各円筒状素子１０
ａ〜１０ｄの外周面と上記筒状部材１の内周面との接触
面積を減らす事ができ、この接触部に働く摩擦抵抗力を
小さくできる。As in the above-described embodiment, the diameter-expanding jigs 3a and 3a are respectively provided on the inner diameter side of the tubular member 1 at a time (the diameter-expanding jigs 3a and 3a are configured to be the same). If all the cylindrical elements are pushed in uniformly, for example, when there is a large difference between the inner diameter dimension of the tubular member 1 in the free state and the inner diameter dimension after the diameter enlargement, each of the diameter expanding jigs 3a, 3a
In some cases, the pushing force to be applied to the shaft may become excessively large. In such a case, the plurality of cylindrical elements 10a to 10d forming each of the diameter-expanding jigs 3a and 3a are divided into several stages (in order from the cylindrical element having a smaller outer diameter), the tubular member 1 is formed.
If it is pushed toward the inner diameter side, the pushing force to be applied can be reduced. When pushing the plurality of cylindrical elements 10a to 10d into the inner diameter side of the tubular member 1 in several stages, the plurality of guide rods 12 and 12 as shown in FIGS. 13 to 16 are used. If the pushing method is performed, the pushing force can be further reduced. Also, if one or a plurality of grooves extending in the axial direction are formed on the outer peripheral surface of each of the cylindrical elements 10a to 10d, each of the cylindrical elements 10a to 10d is formed.
The contact area between the outer peripheral surface of a to 10d and the inner peripheral surface of the tubular member 1 can be reduced, and the frictional resistance acting on this contact portion can be reduced.
【００３３】又、上述した様な拡径装置２ａにより上記
筒状部材１の拡径を行なう場合、上記１対の拡径治具３
ａ、３ａを構成する最外層の円筒状素子の外径寸法を互
いに異ならせれば、上記筒状部材１の拡径量を軸方向両
側で互いに異ならせる事ができる。この様に筒状部材１
の拡径量を軸方向両側で異ならせれば、前述した先発明
の場合と同様に、この筒状部材１の内径側に設置する部
材の径寸法がこの筒状部材１の軸方向両側で異なる場合
でも、この筒状部材１の設置作業を効率良く行なえる。When the diameter of the cylindrical member 1 is expanded by the diameter expanding device 2a as described above, the pair of diameter expanding jigs 3 is used.
If the outer diameters of the outermost cylindrical elements forming a and 3a are made different from each other, the diameter expansion amount of the tubular member 1 can be made different on both axial sides. In this way, the tubular member 1
If the amount of expansion of the diameter is made different on both axial sides, the diameter of the member installed on the inner diameter side of this tubular member 1 is different on both axial sides thereof, as in the case of the above-mentioned invention. Even in this case, the installation work of the tubular member 1 can be efficiently performed.
【００３４】[0034]
【発明の効果】本発明の弾性材製筒状部材の拡径保持方
法及び拡径装置は、以上に述べた様に構成され作用する
ので、サイズの異なる弾性材製筒状部材の拡径作業を同
一の拡径装置により適切に行なえる。この為、この拡径
装置のコストを低減できると共に、拡径作業の能率化を
図れる。As described above, the method for expanding the diameter of the tubular member made of an elastic material and the device for expanding the diameter according to the present invention are configured and operate as described above. Can be properly performed by the same diameter expanding device. Therefore, the cost of the diameter expanding device can be reduced and the diameter expanding work can be efficiently performed.
【図１】本発明の実施の形態の１例を、拡径保持作業の
初期段階で示す部分切断側面図。FIG. 1 is a partially cut side view showing an example of an embodiment of the present invention at an initial stage of a diameter expansion holding work.
【図２】図１に続く作業段階を示す部分切断側面図。FIG. 2 is a partially cut side view showing a work step subsequent to FIG.
【図３】図２に続く作業段階を示す部分切断側面図。FIG. 3 is a partially cut side view showing a work step subsequent to FIG.
【図４】図３に続く作業段階を示す部分切断側面図。FIG. 4 is a partially cutaway side view showing a work step subsequent to FIG.
【図５】拡径保持作業の終了状態を示す部分切断側面
図。FIG. 5 is a partially cut side view showing a finished state of the diameter expansion holding work.
【図６】拡径保持材の１例を示す断面図。FIG. 6 is a cross-sectional view showing an example of a diameter expansion holding material.
【図７】先発明の１例を、拡径保持作業の初期段階で示
す部分切断側面図。FIG. 7 is a partially cut side view showing an example of the prior invention at an initial stage of a diameter expansion holding operation.
【図８】図７に続く作業段階を示す部分切断側面図。FIG. 8 is a partially cut side view showing a work step subsequent to FIG.
【図９】図８に続く作業段階を示す部分切断側面図。FIG. 9 is a partially cut side view showing a work step subsequent to FIG. 8;
【図１０】図９に続く作業段階を示す部分切断側面図。FIG. 10 is a partially cutaway side view showing a work step subsequent to FIG. 9;
【図１１】図１０に続く作業段階を示す部分切断側面
図。FIG. 11 is a partially cut side view showing a work step subsequent to FIG.
【図１２】拡径保持作業の終了状態を示す部分切断側面
図。FIG. 12 is a partially cut side view showing the end state of the diameter expansion holding work.
【図１３】先発明の別例を、拡径保持作業の途中段階で
示しており、（Ａ）は部分切断側面図、（Ｂ）は（Ａ）
の側方から見た端面図。13A and 13B show another example of the prior invention at an intermediate stage of the expansion holding work, in which FIG. 13A is a partially cut side view and FIG. 13B is FIG.
End view seen from the side.
【図１４】図１３に続く作業段階を示す、同図と同様の
図。FIG. 14 is a view similar to that of FIG. 13 showing a work step subsequent to that of FIG. 13;
【図１５】図１４に続く作業段階を示す、部分切断側面
図。FIG. 15 is a partially cutaway side view showing a work step subsequent to FIG. 14;
【図１６】図１５に続く作業段階を示す、図１３と同様
の図。FIG. 16 is a view similar to FIG. 13, showing the work steps subsequent to FIG. 15;
１ 筒状部材 ２、２ａ 拡径装置 ３、３ａ 拡径治具 ４ ガイド棒 ５ ナット ６ 押圧板 ７ 拡径保持材 ８ 円すい凸面 ９ 傾斜面 １０ａ〜１０ｄ 円筒状素子 １１ 押込用スリーブ １２ ガイドロッド １３ 拡径保持材 １４ 線材 1 tubular member 2, 2a diameter expansion device 3, 3a Expanding jig 4 guide rod 5 nuts 6 Press plate 7 Expanding diameter holding material 8 Conical convex 9 inclined surface 10a to 10d Cylindrical element 11 Pushing sleeve 12 Guide rod 13 Expanding diameter holding material 14 wire rod
Claims (3)
筒状部材の内径を弾性的に広げると共に、この筒状部材
の内径が弾性的に広がった状態を保持する、弾性材製筒
状部材の拡径保持方法であって、それぞれの径寸法が互
いに異なる複数の筒状素子同士を互いに同心に且つ軸方
向の相対変位可能に組み合わせて成ると共に、これら複
数の筒状素子の中から選択した何れかの筒状素子を最外
層の筒状素子とする事によりその外径寸法を多段階に調
節自在とした拡径治具を１対用意し、これら各拡径治具
を構成する複数の筒状素子の中から拡径すべき上記筒状
部材の内径寸法に見合った外径寸法を有する筒状素子を
選択し、当該筒状素子を上記各拡径治具を構成する最外
層の筒状素子とした状態で、これら各拡径治具を上記筒
状部材の内径側にそれぞれこの筒状部材の両端開口から
押し込む事によりこの筒状部材の内径を弾性的に広げた
後、上記各拡径治具とも、上記最外層の筒状素子以外の
筒状素子を上記筒状部材の内径側から抜き取って、これ
ら各最外層の筒状素子により上記筒状部材の内径を弾性
的に広げた状態を保持する、弾性材製筒状部材の拡径保
持方法。1. A tubular member made of an elastic material, which elastically widens the inner diameter of a tubular member which is made entirely of an elastic material and has a cylindrical shape, and which maintains the state where the inner diameter of the tubular member is elastically widened. A method for maintaining the expanded diameter of a member, comprising combining a plurality of cylindrical elements having different diameters so as to be concentric with each other and capable of relative displacement in the axial direction, and selecting from the plurality of cylindrical elements. One of the above-mentioned tubular elements is used as the outermost tubular element, and a pair of diameter-expanding jigs whose outer diameters can be adjusted in multiple stages are prepared. From the tubular elements of, select a tubular element having an outer diameter dimension corresponding to the inner diameter dimension of the tubular member to be expanded, the tubular element of the outermost layer constituting each of the diameter expansion jig With the cylindrical element, place each of these diameter expansion jigs on the inner diameter side of the cylindrical member. After the inner diameter of the tubular member is elastically expanded by pushing in from the openings at both ends of the tubular member, the tubular elements other than the outermost tubular element are used for the above-mentioned expansion jigs. A method for holding an expanded diameter of a tubular member made of an elastic material, wherein the tubular member is pulled out from the inner diameter side, and the tubular element of each outermost layer holds the state where the inner diameter of the tubular member is elastically expanded.
の筒状素子の内径側に、その外径寸法が筒状部材の自由
状態での内径寸法よりも大きい拡径保持材を挿通し、次
いで、上記各最外層の筒状素子を上記筒状部材の内径側
から抜き取る事により、この筒状部材を上記拡径保持材
に弾性的に外嵌させる事で、この筒状部材の内径を弾性
的に広げた状態を保持する、弾性材製筒状部材の拡径保
持方法。2. After carrying out the method of claim 1, on the inner diameter side of the tubular element of each outermost layer, a diameter expansion holding material having an outer diameter dimension larger than the inner diameter dimension of the tubular member in the free state is provided. By inserting the tubular element of each outermost layer from the inner diameter side of the tubular member, and then elastically fitting the tubular member to the diameter expansion holding member, the tubular member is inserted. A method for maintaining the expanded diameter of a tubular member made of an elastic material, in which a state in which the inner diameter of the elastic member is elastically expanded is maintained.
に構成した筒状部材の自由状態での内径寸法よりも大き
い外径寸法を有し、この筒状部材の内径側にそれぞれこ
の筒状部材の両端開口から押し込む事によりこの筒状部
材の内径を弾性的に広げる事が可能な１対の拡径治具
と、これら各拡径治具及び筒状部材の中心孔に挿通自在
なガイド棒と、上記各拡径治具の基端面を押圧自在な押
圧手段とを備え、上記各拡径治具は、それぞれの径寸法
が互いに異なる複数の筒状素子同士を互いに同心に且つ
軸方向の相対変位可能に組み合わせて成ると共に、これ
ら複数の筒状素子の中から選択した何れかの筒状素子を
最外層の筒状素子とする事によりその外径寸法を多段階
に調節自在である、弾性材製筒状部材の拡径装置。3. Each has an outer diameter dimension larger than an inner diameter dimension in a free state of a tubular member which is entirely made of a cylindrical member made of an elastic material, and the tubular member is provided on the inner diameter side of the tubular member. A pair of diameter-expanding jigs capable of elastically expanding the inner diameter of the tubular member by pushing from both ends of the member, and guides that can be inserted into the respective diameter-expanding jigs and the center holes of the tubular members. A rod and a pressing means that can press the base end surface of each of the diameter expanding jigs, and each of the diameter expanding jigs has a plurality of tubular elements having different diameters, which are concentric with each other and in the axial direction. Of the cylindrical elements selected from the plurality of cylindrical elements is used as the outermost cylindrical element, and the outer diameter can be adjusted in multiple steps. A device for expanding a tubular member made of an elastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002002123A JP3811070B2 (en) | 2002-01-09 | 2002-01-09 | Method and device for expanding diameter of cylindrical member made of elastic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002002123A JP3811070B2 (en) | 2002-01-09 | 2002-01-09 | Method and device for expanding diameter of cylindrical member made of elastic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003204613A true JP2003204613A (en) | 2003-07-18 |
| JP3811070B2 JP3811070B2 (en) | 2006-08-16 |
Family
ID=27642075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002002123A Expired - Fee Related JP3811070B2 (en) | 2002-01-09 | 2002-01-09 | Method and device for expanding diameter of cylindrical member made of elastic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3811070B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013074716A (en) * | 2011-09-28 | 2013-04-22 | Viscas Corp | Diameter expansion member |
| JP2016185003A (en) * | 2015-03-25 | 2016-10-20 | 住友電気工業株式会社 | Diameter expansion method of insulation cylinder, method of manufacturing power cable connection unit, and diameter expansion device of insulation cylinder |
-
2002
- 2002-01-09 JP JP2002002123A patent/JP3811070B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013074716A (en) * | 2011-09-28 | 2013-04-22 | Viscas Corp | Diameter expansion member |
| JP2016185003A (en) * | 2015-03-25 | 2016-10-20 | 住友電気工業株式会社 | Diameter expansion method of insulation cylinder, method of manufacturing power cable connection unit, and diameter expansion device of insulation cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3811070B2 (en) | 2006-08-16 |
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