JPH07112424A - Tube diameter extending/contracting device - Google Patents
Tube diameter extending/contracting deviceInfo
- Publication number
- JPH07112424A JPH07112424A JP28602593A JP28602593A JPH07112424A JP H07112424 A JPH07112424 A JP H07112424A JP 28602593 A JP28602593 A JP 28602593A JP 28602593 A JP28602593 A JP 28602593A JP H07112424 A JPH07112424 A JP H07112424A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- bodies
- divided
- fitting
- drive
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の分割管体で構成
される管体の外径を僅かに変化させるための拡縮径装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expanding / contracting diameter device for slightly changing the outer diameter of a pipe body composed of a plurality of divided pipe bodies.
【０００２】[0002]
【従来の技術】例えば、コンクリート二次製品の成型に
おいて、この二次製品に吊孔を設ける場合には、一種の
中子としての機能を果たす棒状又は筒状の中子体を成形
型に装着して、型内にコンクリートを流し込み、コンク
リートの硬化後に、この中子体を引き抜くことにより上
記吊孔を成形している。このような場合において、中子
体の引き抜きを容易にするために、この引抜き時におい
ては、中子体が縮径する構造であると、極めて便利であ
る。2. Description of the Related Art For example, in the case of molding a secondary concrete product, when a hanging hole is provided in this secondary product, a rod-shaped or cylindrical core that functions as a kind of core is attached to a molding die. Then, concrete is poured into the mold, and after the concrete is hardened, the core is pulled out to form the hanging hole. In such a case, in order to facilitate the pulling-out of the core body, it is extremely convenient to have a structure in which the diameter of the core body is reduced during the pulling-out.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、例えば上記
した中子体のような管体の外径を僅かに変化させられる
管体の拡縮径装置の提供を課題としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a device for expanding / contracting a tube, such as the above-mentioned core, which can slightly change the outer diameter of the tube.
【０００４】[0004]
【課題を解決するための手段】本発明に係る管体の拡縮
径装置は、ロッド本体の両端面にそれぞれ係合ピンが突
設された複数本の駆動ロッドと、円筒体の両端部にそれ
ぞれ円盤状のフランジ体が設けられて、各フランジ体の
外周部の同一位相位置に前記駆動ロッドのロッド本体を
嵌合させるための嵌合案内溝が該駆動ロッドと同数だけ
周方向に沿って設けられた中芯体と、管体の周方向に沿
った分割部を僅かに欠落させて該管体を前記駆動ロッド
と同数に分割して複数の分割片を形成すると共に、両端
部に該駆動ロッドのロッド本体の一部が嵌合される嵌合
溝がそれぞれ設けられた駆動ロッド嵌合体を形成して、
該分割片の内周面に所定間隔をおいて複数個の該駆動ロ
ッド嵌合体が固着された構造の複数の分割管体と、前記
中芯体を構成する円筒体に挿通されるロッド本体の両端
部にそれぞれ円盤体が固着されて、各円盤体の相対向す
る内面の同一位相位置に前記各駆動ロッドの係合ピンを
挿入して係合させるための複数の係合溝が接線方向に対
して僅かに傾斜した方向に設けられた操作ロッドと、か
ら成り、前記中芯体の周囲に複数の前記分割管体を配置
して、相隣接する分割管体を構成する各駆動ロッド嵌合
体の相対向する各嵌合溝の間にそれぞれ駆動ロッドを挿
通嵌合させて、各駆動ロッドを介して中芯体と各分割管
体とを互いに係合させ、該中芯体の円筒体に操作ロッド
のロッド本体を挿通させて、前記各駆動ロッドの両端の
係合ピンをそれぞれ該操作ロッドの各円盤体の内面の係
合溝に係合させることにより、前記４種類の各部材を一
体に組み付けたことを特徴としている。A pipe expanding / contracting device according to the present invention comprises a plurality of drive rods having engaging pins projecting from both end surfaces of a rod body and both end portions of a cylindrical body. A disk-shaped flange body is provided, and fitting guide grooves for fitting the rod body of the drive rod are provided along the circumferential direction at the same phase position on the outer peripheral portion of each flange body along the circumferential direction. And the divided portion along the circumferential direction of the pipe body are slightly cut off to divide the pipe body into the same number as the drive rod to form a plurality of divided pieces, and the drive members are provided at both ends. Forming a drive rod fitting body provided with a fitting groove into which a part of the rod body of the rod is fitted,
A plurality of divided pipe bodies having a structure in which a plurality of drive rod fitting bodies are fixed to the inner peripheral surface of the divided piece at predetermined intervals, and a rod body inserted into a cylindrical body forming the core body. Discs are fixed to both ends, and a plurality of engagement grooves for inserting and engaging the engagement pins of the drive rods at the same phase position on the inner surfaces of the discs facing each other are tangentially provided. An operating rod provided in a direction slightly inclined with respect to each other, and a plurality of divided pipe bodies arranged around the core body to form adjacent divided pipe bodies, each drive rod fitting body. Drive rods are inserted and fitted between the fitting grooves facing each other, and the core body and the divided pipe bodies are engaged with each other through the drive rods, and the cylindrical body of the core body is fitted. Insert the rod body of the operating rod into the engaging pins on both ends of each drive rod. By engaging the engagement groove of the inner surfaces of the disk body of the operating rod, it is characterized in that integrally assembled to each member of the four types.
【０００５】[0005]
【発明の作用】操作ロッドを所定角度内で往復回動させ
ると、該操作ロッドを構成する各円盤体の相対向する内
面に形成された係合溝が接線方向に対して僅かに傾斜し
ているために、この係合溝に係合ピンが係合されている
各駆動ロッドは半径方向に僅かに移動させられる。相隣
接する分割管体を構成する各駆動ロッド嵌合体の相対向
する嵌合溝の間に駆動ロッドのロッド本体が挿通嵌合さ
れているために、上記のようにして各駆動ロッドが半径
方向に僅かに移動すると、各分割管体は同方向に僅かに
移動させられ、これにより各分割管体で構成される管体
の径が僅かに変化する。When the operating rod is reciprocally rotated within a predetermined angle, the engaging grooves formed on the inner surfaces of the discs constituting the operating rod, which face each other, are slightly inclined with respect to the tangential direction. Therefore, each drive rod in which the engagement pin is engaged with the engagement groove is slightly moved in the radial direction. Since the rod bodies of the drive rods are inserted and fitted between the fitting grooves facing each other of the drive rod fittings that form the adjacent divided pipe bodies, the drive rods are radially aligned as described above. When each of the divided pipes is moved slightly, the respective divided pipes are slightly moved in the same direction, and the diameter of the pipe constituted by the divided pipes is slightly changed.
【０００６】[0006]
【実施例】以下、実施例を挙げて本発明を更に詳細に説
明する。図１は、本発明に係る管体の拡縮径装置の分解
斜視図であり、図２は、中芯体Ｂの縦断面図であり、図
３は、同じく右側面図であり、図４は、同じく左側面図
であり、図５は、操作ロッドＤの正面図であり、図６
は、図５のＸ1 −Ｘ1 線拡大断面図であり、図７は、図
５のＸ2 −Ｘ2 線拡大断面図であり、図８は、管体の拡
径時における拡縮径装置の横断面図であり、図９は、同
じく縮径時における拡縮径装置の横断面図であり、図１
０は、図８のＹ1 −Ｙ1 線縮小断面図であり、図１１
は、図８のＹ2 −Ｙ2 線縮小断面図であり、図１２は、
管体の径が変化されることを示す作用説明図である。本
実施例の管体の拡縮径装置は、４本の駆動ロッドＡと、
中芯体Ｂと、４本の分割管体Ｃと、操作ロッドＤとの４
つの部材で構成される。EXAMPLES The present invention will be described in more detail with reference to examples. FIG. 1 is an exploded perspective view of a tube expansion / contraction device according to the present invention, FIG. 2 is a vertical cross-sectional view of a core body B, FIG. 3 is a right side view of the same, and FIG. 6 is a left side view, FIG. 5 is a front view of the operating rod D, and FIG.
5 is an enlarged sectional view taken along line X 1 -X 1 of FIG. 5, FIG. 7 is an enlarged sectional view taken along line X 2 -X 2 of FIG. 5, and FIG. 8 is an expansion / contraction device for expanding the diameter of the tubular body. 9 is a transverse cross-sectional view of the expansion / contraction device at the same time when the diameter is reduced, and FIG.
0 is a reduced sectional view taken along line Y 1 -Y 1 of FIG.
8 is a reduced sectional view taken along line Y 2 -Y 2 of FIG. 8, and FIG.
It is an operation explanatory view showing that the diameter of a pipe is changed. The tube expanding / contracting device of this embodiment includes four drive rods A,
The core body B, the four divided pipe bodies C, and the operation rod D
Composed of one member.
【０００７】駆動ロッドＡは、図１に示されるように、
ロッド本体１の両端面にそれぞれ係合ピン２が突設され
た構成である。このロッド本体１の横断面形状は、図９
に示されるように、四角形の相隣接する２つのコーナー
部を面取りした変則六角形状をしていて、この面取りさ
れて形成された面は密着面１ａ（図９参照）となってい
ると共に、両密着面１ａで囲まれる面は、分割管体Ｃを
構成する後述の分割片７の外周面と同一曲率半径の曲面
１ｂに形成されている。The drive rod A, as shown in FIG.
This is a configuration in which engaging pins 2 are provided on both end surfaces of the rod body 1 so as to project therefrom. The cross-sectional shape of this rod body 1 is shown in FIG.
As shown in FIG. 3, the corners are irregular hexagonal shapes in which two adjacent corners are chamfered, and the chamfered surface is a contact surface 1a (see FIG. 9). The surface surrounded by the contact surface 1a is formed as a curved surface 1b having the same radius of curvature as the outer peripheral surface of a divided piece 7 which will be described later and which constitutes the divided pipe body C.
【０００８】中芯体Ｂは、図１ないし図４に示されるよ
うに、円筒体３の両端部に直径の異なる円盤状のフラン
ジ体４ａ，４ｂが一体に設けられて、各フランジ体４
ａ，４ｂの外周部の同一位相位置に前記駆動ロッドＡの
ロッド本体１を嵌合させるための複数の嵌合案内溝５が
周方向に沿って等間隔をおいて半径方向に設けられてい
る。よって、嵌合案内溝５の形状は、ロッド本体１の断
面形状に対応している。実施例では、円筒体３の一端部
が大径に形成されて、この大径部の端面に大径のフラン
ジ体４ａが複数本のボルト６を介して固定され、円筒体
３の他方の端面に小径のフランジ体４ｂが溶接により固
定されている。そして、円筒体３の中心から各フランジ
体４ａ，４ｂの嵌合案内溝５の底面に至る各長さ
(ａ1),(ａ2)は異なっていて、（ａ1 ＞ａ2 ）の関係に
なっている。As shown in FIGS. 1 to 4, the core body B has disk-shaped flange bodies 4a and 4b having different diameters integrally provided at both ends of a cylindrical body 3, and each flange body 4
A plurality of fitting guide grooves 5 for fitting the rod body 1 of the drive rod A are provided in the radial direction at equal intervals along the circumferential direction at the same phase position on the outer peripheral portions of a and 4b. . Therefore, the shape of the fitting guide groove 5 corresponds to the cross-sectional shape of the rod body 1. In the embodiment, one end of the cylindrical body 3 is formed to have a large diameter, and the large-diameter flange body 4a is fixed to the end surface of this large-diameter portion via a plurality of bolts 6, and the other end surface of the cylindrical body 3 is fixed. A small-diameter flange body 4b is fixed to the shaft by welding. Each length from the center of the cylindrical body 3 to the bottom surface of the fitting guide groove 5 of each of the flange bodies 4a and 4b
(a 1 ) and (a 2 ) are different and have a relationship of (a 1 > a 2 ).
【０００９】分割管体Ｃは、図１及び図９に示されるよ
うに、テーパー管の周方向に沿った各分割部を僅かに欠
落させて、該テーパー管を周方向に沿って４分割して分
割片７を形成し、この分割片７の内周面に複数（実施例
では３個）の駆動ロッド嵌合体８を所定間隔をおいて一
体に取付けた構成である。この駆動ロッド嵌合体８は、
その外周面は前記分割片７の内周面に対応した円弧状を
していると共に、その内周面は前記中芯体Ｂの円筒体３
の外周面に対応した円弧状をしていて、全体としてリン
グ分状をしており、その両端部に前記駆動ロッドＡのロ
ッド本体１を部分的に嵌合させるための嵌合溝９がそれ
ぞれ設けられている。前記分割片７の両側端部は、断面
鋭角状に形成されて、その両側端面は、前記ロッド本体
１の密着面１ａと相密着する密着面７ａ（図９参照）と
なっている。本実施例の分割管体Ｃは、テーパー管を周
方向に沿って複数に分割したものであるため、その内周
面に一体に取付けられる複数個の駆動ロッド嵌合体８の
幅（半径方向に沿った長さ）は、漸次変化している（図
１０及び図１１参照）。As shown in FIGS. 1 and 9, the split tube body C is divided into four parts along the circumferential direction by slightly cutting off the respective split parts along the circumferential direction of the tapered tube. The divided pieces 7 are formed by forming the divided pieces 7, and a plurality of (three in the embodiment) drive rod fittings 8 are integrally attached to the inner peripheral surface of the divided pieces 7 at predetermined intervals. This drive rod fitting 8 is
The outer peripheral surface has an arc shape corresponding to the inner peripheral surface of the divided piece 7, and the inner peripheral surface thereof is the cylindrical body 3 of the core body B.
Has a circular arc shape corresponding to the outer peripheral surface of the drive rod, and has a ring-like shape as a whole, and has fitting grooves 9 for partially fitting the rod body 1 of the drive rod A at both ends thereof. It is provided. Both side ends of the divided piece 7 are formed to have an acute-angled cross section, and both side end surfaces thereof are contact surfaces 7a (see FIG. 9) that are in close contact with the contact surface 1a of the rod body 1. The split tube body C of the present embodiment is formed by dividing the tapered tube into a plurality of pieces along the circumferential direction. Therefore, the widths (in the radial direction) of the plurality of drive rod fitting bodies 8 integrally attached to the inner circumferential surface thereof are The length along the line gradually changes (see FIGS. 10 and 11).
【００１０】操作ロッドＤは、図１並びに図５ないし図
７に示されているように、前記中芯体Ｂを構成する円筒
体３に挿通されるロッド本体１１の両端部にそれぞれ径
の異なる円盤体１２ａ，１２ｂがピン１３により一体に
取付けられて、該ロッド本体１１の一端部にハンドル１
４が取付けられ、各円盤体１２ａ，１２ｂの相対向する
内面の同一位相位置に前記各駆動ロッドＡの係合ピン２
を挿入して係合させるための複数の直線状の係合溝１５
が接線方向に対して僅かに傾斜して設けられたものであ
る。即ち、係合溝１５は、接線方向に対して僅かに傾斜
して設けられているために、図６において、円盤体１２
ａに設けられた係合溝１５の両形成端部の中央位置とロ
ッド本体１１の中心とを結ぶ各長さ (ｂ1),(ｂ2)は異な
っていて、（ｂ1 ＞ｂ2 ）の関係になっている。同様に
して、図７において、円盤体１２ｂに設けられた係合溝
１５の両形成端部の中央位置とロッド本体１１の中心と
を結ぶ各長さ (ｃ1),(ｃ2)も異なっていて、（ｃ1 ＞ｃ
2 ）の関係になっている。そして、両円盤体１２ａ，１
２ｂの間においては、（ｂ1 ＞ｃ1 ）と（ｂ2 ＞ｃ2 ）
の関係となっている。As shown in FIGS. 1 and 5 to 7, the operating rod D has different diameters at both ends of the rod body 11 which is inserted into the cylindrical body 3 constituting the core body B. The disk bodies 12a and 12b are integrally attached by a pin 13, and the handle 1 is attached to one end of the rod body 11.
4 are attached, and the engaging pins 2 of the drive rods A are placed at the same phase positions on the inner surfaces of the disc bodies 12a and 12b facing each other.
A plurality of linear engagement grooves 15 for inserting and engaging
Is provided so as to be slightly inclined with respect to the tangential direction. That is, since the engagement groove 15 is provided so as to be slightly inclined with respect to the tangential direction, in FIG.
The respective lengths (b 1 ) and (b 2 ) connecting the center position of both forming ends of the engaging groove 15 provided in a to the center of the rod body 11 are different (b 1 > b 2 ). Have a relationship. Similarly, in FIG. 7, the respective lengths (c 1 ) and (c 2 ) connecting the central position of both forming ends of the engaging groove 15 provided in the disk body 12b and the center of the rod body 11 are also different. And (c 1 > c
2 ) are in a relationship. And both disc bodies 12a, 1
Between 2b, (b 1 > c 1 ) and (b 2 > c 2 )
It has a relationship of.
【００１１】そして、上記した４つの各部材Ａ，Ｂ，
Ｃ，Ｄを以下のようにして組み付けるのである。即ち、
図９及び図１１に示されるように、中芯体Ｂの周囲に４
本の分割管体Ｃを配置して、相隣接する分割管体Ｃを構
成する各駆動ロッド嵌合体８の相対向する各嵌合溝９の
間にそれぞれ駆動ロッドＡのロッド本体１を挿通嵌合さ
せると共に、各ロッド本体１の両端部をそれぞれ中芯体
Ｂの各フランジ体４ａ，４ｂに形成された嵌合案内溝５
に嵌合させると、中芯体Ｂと４本の分割管体Ｃとが４本
の駆動ロッドＡを介して互いに係合される。次に、操作
ロッドＤを構成する小径の円盤体１２ｂを取り外してお
いて、そのロッド本体１１を中芯体Ｂの円筒体３に挿通
して、円盤体１２ａの内面に形成された各係合溝１５に
各駆動ロッドＡの一端の係合ピン２を係合させると共
に、円盤体１２ｂの内面の各係合溝１５に各駆動ロッド
Ａの他端の係合ピン２が係合するようにして、ロッド本
体１１の他端部に該円盤体１２ｂを嵌め込んでピン１３
を介して固定する。これにより、４本の駆動ロッドＡ
と、中芯体Ｂと、４本の分割管体Ｃと、操作ロッドＤと
の４つの部材が一体に組み付けられる。Then, the above-mentioned four members A, B,
The C and D are assembled as follows. That is,
As shown in FIG. 9 and FIG.
The divided pipe bodies C are arranged, and the rod bodies 1 of the drive rods A are inserted and fitted between the respective fitting grooves 9 of the drive rod fitting bodies 8 constituting the adjacent divided pipe bodies C. While fitting together, both end portions of each rod body 1 are fitted with guide grooves 5 formed in each flange body 4a, 4b of the core body B, respectively.
, The core body B and the four divided pipe bodies C are engaged with each other via the four drive rods A. Next, the small-diameter disk body 12b that constitutes the operation rod D is removed, and the rod body 11 is inserted into the cylindrical body 3 of the core body B to form the engagements formed on the inner surface of the disk body 12a. The engagement pin 2 at one end of each drive rod A is engaged with the groove 15, and the engagement pin 2 at the other end of each drive rod A is engaged with each engagement groove 15 on the inner surface of the disk body 12b. Then, the disk body 12b is fitted into the other end of the rod body 11 and the pin 13
Fixed through. As a result, the four drive rods A
The four members of the core body B, the four divided pipe bodies C, and the operating rod D are integrally assembled.
【００１２】このように、操作ロッドＤを構成する各円
盤体１２ａ，１２ｂの相対向する内面に形成された係合
溝１５が接線方向に対して僅かに傾斜しているので、ハ
ンドル１４によって操作ロッドＤを所定角度〔図６及び
図７で（θ）で表示される角度〕内で往復回動させる
と、図１２に示されるように、各円盤体１２ａ，１２ｂ
の係合溝１５に両端の係合ピン２が挿入係合されている
駆動ロッドＡのロッド本体１は、図３及び図４に示され
るように、その両端部が中芯体Ｂの各フランジ体４ａ，
４ｂの嵌合案内溝５に案内されて、僅かな量（ｂ1 −ｂ
2 ＝ｃ1 −ｃ2)だけ半径方向に移動させられる。相隣接
する分割管体Ｃを構成する駆動ロッド嵌合体８の相対向
する嵌合溝９の間に駆動ロッドＡのロッド本体１が挿通
嵌合されているので、上記のようにして各駆動ロッドＡ
が半径方向に僅かに移動すると、各分割管体Ｃは同方向
に僅かに移動させられて、各分割管体Ｃで構成されるテ
ーパー管の外径が僅かに変化する。As described above, since the engaging grooves 15 formed on the inner surfaces of the disc bodies 12a and 12b constituting the operating rod D facing each other are slightly inclined with respect to the tangential direction, the handle 14 is operated. When the rod D is reciprocally rotated within a predetermined angle [angle indicated by (θ) in FIGS. 6 and 7], as shown in FIG. 12, the disc bodies 12a and 12b are rotated.
As shown in FIGS. 3 and 4, the rod main body 1 of the drive rod A in which the engaging pins 2 at both ends are inserted and engaged in the engaging groove 15 of each of the flanges of the core body B has its both ends. Body 4a,
Guided in the fitting guide groove 5 of 4b, a slight amount (b 1 -b
2 = c 1 −c 2 ) in the radial direction. Since the rod main body 1 of the drive rod A is inserted and fitted between the fitting grooves 9 of the drive rod fitting bodies 8 constituting the adjacent divided pipe bodies C, the drive rod fitting bodies 8 are fitted as described above. A
Is slightly moved in the radial direction, each divided pipe body C is slightly moved in the same direction, and the outer diameter of the tapered pipe constituted by each divided pipe body C is slightly changed.
【００１３】即ち、図８及び図１０は、各分割管体Ｃで
構成されるテーパー管が最も拡径された状態であって、
駆動ロッドＡの係合ピン２は、分割管体Ｃの各円盤体１
２ａ，１２ｂに形成された係合溝１５におけるロッド本
体１１からの距離が大きい方の端部に達していて、駆動
ロッドＡのロッド本体１の密着面１ａと分割管体Ｃの分
割片７の密着面７ａとが相密着して、相隣接する分割片
７の間にロッド本体１の外周部が入り込んだ状態となっ
て、該ロッド本体１の曲面１ｂと該分割片７の外周面と
が連続して同一円周上に位置し、４枚の分割片７の外周
面と４本の駆動ロッドＡのロッド本体１の曲面１ｂとで
完全なテーパー円筒面を形成している。That is, FIG. 8 and FIG. 10 show a state in which the taper pipe constituted by each divided pipe body C is most expanded,
The engagement pin 2 of the drive rod A is the disc body 1 of the split tube body C.
The engagement groove 15 formed in 2a, 12b reaches an end of the engagement groove 15 that is farther from the rod body 11, and the contact surface 1a of the rod body 1 of the drive rod A and the division piece 7 of the division pipe body C are separated. The contact surface 7a and the contact surface 7a are in close contact with each other, and the outer peripheral portion of the rod body 1 is inserted between the adjacent divided pieces 7, and the curved surface 1b of the rod body 1 and the outer peripheral surface of the divided piece 7 are separated from each other. These are continuously located on the same circumference, and the outer peripheral surfaces of the four divided pieces 7 and the curved surface 1b of the rod body 1 of the four drive rods A form a complete tapered cylindrical surface.
【００１４】図９及び図１１は、上記の状態において、
ハンドル１４によって操作ロッドＤを角度（θ）だけ回
動させて、各分割管体Ｃで構成されるテーパー管が最も
縮径された状態である。各駆動ロッドＡが半径方向に僅
かに後退して、これにより各分割管体Ｃも後退させられ
ているが、該分割管体Ｃの後退量は該駆動ロッドＡのそ
れよりも少ないために、相隣接する分割片７の隙間に対
して駆動ロッドＡのロッド本体１が引っ込んでいる。FIG. 9 and FIG.
The operation rod D is rotated by an angle (θ) by the handle 14, and the tapered pipe constituted by the divided pipe bodies C is in the most reduced diameter state. Each drive rod A is slightly retracted in the radial direction, whereby each divided pipe body C is also retracted. However, since the amount of retreat of the divided pipe body C is smaller than that of the drive rod A, The rod body 1 of the drive rod A is retracted into the gap between the adjacent divided pieces 7.
【００１５】また、「従来の技術」の項目で述べたよう
に、本発明に係る拡縮径装置を備えた管体を中子体とし
て用いて、コンクリート二次製品に吊孔をあける場合な
どにおいては、拡径させた状態で型枠にセットして、コ
ンクリートの硬化後に縮径させて引き抜くのである。こ
の使用時においては、コンクリート圧によって管体に
は、これを縮径させようとする外力が作用するが、この
外力が操作ロッドＤに対して回転モーメントとして作用
することは全くないので、管体の拡径時における操作ロ
ッドＤのロック機構は不要である。In addition, as described in the item of "Prior Art", when a tube having the expansion / contraction diameter device according to the present invention is used as a core, a secondary concrete product is provided with a hanging hole. Is set in a form with the diameter expanded, and after the concrete hardens, the diameter is reduced and the material is extracted. During this use, an external force that attempts to reduce the diameter of the pipe acts on the pipe due to the concrete pressure, but since this external force does not act on the operating rod D as a rotational moment at all, the pipe is The lock mechanism for the operating rod D when the diameter of the rod is expanded is unnecessary.
【００１６】なお、上記実施例における分割管体Ｃは、
テーパー管を分割したものを例として挙げたが、全ての
部分の外径が等しい通常の管体を分割したものに対して
も実施可能である。また、管体の周方向に沿った分割数
も上記したものに限定されず、理論上は、２以上のいず
れであってもよい。The split tube C in the above embodiment is
An example in which the tapered pipe is divided has been given as an example, but it is also possible to divide into an ordinary pipe body in which all parts have the same outer diameter. Further, the number of divisions along the circumferential direction of the tubular body is not limited to the above, and theoretically may be any number of 2 or more.
【００１７】[0017]
【発明の効果】以上詳述したように、本発明に係る管体
の拡縮径装置によれば、管体を周方向に沿って複数に分
割した分割管体の内部に必要な機構を収納することによ
って、管体の拡縮径をワンタッチで行えると共に、管体
の拡径時におけるロック機構が不要であるという優れた
効果が奏される。As described in detail above, according to the pipe expanding / contracting diameter device of the present invention, the necessary mechanism is housed in the divided pipe body obtained by dividing the pipe body in the circumferential direction. As a result, it is possible to achieve an excellent effect that the diameter of the tubular body can be expanded / contracted with one touch and a lock mechanism is not required when the diameter of the tubular body is expanded.
【図１】本発明に係る管体の拡縮径装置の分解斜視図で
ある。FIG. 1 is an exploded perspective view of a tube expansion / contraction diameter device according to the present invention.
【図２】中芯体Ｂの縦断面図である。FIG. 2 is a vertical cross-sectional view of a core body B.
【図３】同じく右側面図である。FIG. 3 is a right side view of the same.
【図４】同じく左側面図である。FIG. 4 is a left side view of the same.
【図５】操作ロッドＤの正面図である。5 is a front view of an operating rod D. FIG.
【図６】図５のＸ1 −Ｘ1 線拡大断面図である。6 is an enlarged cross-sectional view taken along line X 1 -X 1 of FIG.
【図７】図５のＸ2 −Ｘ2 線拡大断面図である。FIG. 7 is an enlarged sectional view taken along line X 2 -X 2 of FIG.
【図８】管体の拡径時における拡縮径装置の横断面図で
ある。FIG. 8 is a transverse cross-sectional view of the expansion / contraction diameter device when expanding the diameter of the tubular body.
【図９】管体の縮径時における拡縮径装置の横断面図で
ある。FIG. 9 is a transverse cross-sectional view of the expansion / contraction device when the tube is contracted.
【図１０】図８のＹ1 −Ｙ1 線縮小断面図である。10 is a reduced cross-sectional view taken along line Y 1 -Y 1 of FIG.
【図１１】図８のＹ2 −Ｙ2 線縮小断面図である。11 is a Y 2 -Y 2 line reduction sectional view of FIG.
【図１２】管体の径の変化を示す作用説明図である。FIG. 12 is an operation explanatory view showing a change in diameter of the tubular body.
Ａ：駆動ロッド Ｂ：中芯体 Ｃ：分割管体 Ｄ：操作ロッド １：駆動ロッドのロッド本体 ２：係合ピン ４ａ，４ｂ：フランジ体 ７：分割片 ８：駆動ロッド嵌合体 ９：駆動ロッド嵌合体の嵌合溝 １１：操作ロッドのロッド本体 12a,12b：円盤体 １５：円盤体に形成された係合溝 A: Drive rod B: Core body C: Divided tube body D: Operation rod 1: Rod body of drive rod 2: Engagement pin 4a, 4b: Flange body 7: Divided piece 8: Drive rod fitting body 9: Drive rod Fitting groove of fitting body 11: Rod body of operating rod 12a, 12b: Disk body 15: Engagement groove formed in disk body
Claims (3)
が突設された複数本の駆動ロッドと、 円筒体の両端部にそれぞれ円盤状のフランジ体が設けら
れて、各フランジ体の外周部の同一位相位置に前記駆動
ロッドのロッド本体を嵌合させるための嵌合案内溝が該
駆動ロッドと同数だけ周方向に沿って設けられた中芯体
と、 管体の周方向に沿った分割部を僅かに欠落させて該管体
を前記駆動ロッドと同数に分割して複数の分割片を形成
すると共に、両端部に該駆動ロッドのロッド本体の一部
が嵌合される嵌合溝がそれぞれ設けられた駆動ロッド嵌
合体を形成して、該分割片の内周面に所定間隔をおいて
複数個の該駆動ロッド嵌合体が固着された構造の複数の
分割管体と、 前記中芯体を構成する円筒体に挿通されるロッド本体の
両端部にそれぞれ円盤体が固着されて、各円盤体の相対
向する内面の同一位相位置に前記各駆動ロッドの係合ピ
ンを挿入して係合させるための複数の係合溝が接線方向
に対して僅かに傾斜した方向に設けられた操作ロッド
と、 から成り、前記中芯体の周囲に複数の前記分割管体を配
置して、相隣接する分割管体を構成する各駆動ロッド嵌
合体の相対向する各嵌合溝の間にそれぞれ駆動ロッドの
ロッド本体を挿通嵌合させて、各駆動ロッドを介して中
芯体と各分割管体とを互いに係合させ、該中芯体の円筒
体に操作ロッドのロッド本体を挿通させて、前記各駆動
ロッドの両端の係合ピンをそれぞれ該操作ロッドの各円
盤体の内面の係合溝に係合させることにより、前記４種
類の各部材を一体に組み付け、該操作ロッドを所定角度
内で往復回動させて、各駆動ロッドが半径方向に僅かに
移動して、各分割管体を同方向に僅かに移動させること
により、各分割管体で構成される管体の径が変化するよ
うに構成したことを特徴とする管体の拡縮径装置。1. A plurality of drive rods having engagement pins projecting from both end surfaces of a rod body, and disk-shaped flange bodies provided at both end portions of a cylindrical body, and outer peripheral portions of the respective flange bodies. A core body provided with the same number of fitting guide grooves for fitting the rod body of the drive rod in the same phase position along the circumferential direction of the drive rod, and a division of the tubular body along the circumferential direction. The tubular body is divided into the same number as that of the drive rod to form a plurality of divided pieces by slightly omitting a portion, and a fitting groove into which a part of the rod body of the drive rod is fitted is formed at both ends. A plurality of divided pipe bodies each of which is provided with a drive rod fitting body, and a plurality of the drive rod fitting bodies are fixed to the inner peripheral surface of the divided piece at a predetermined interval; At both ends of the rod body that is inserted into the cylindrical body The disc bodies are fixed, and a plurality of engagement grooves for inserting and engaging the engagement pins of the drive rods at the same phase position on the inner surfaces of the disc bodies facing each other are slightly formed in the tangential direction. An operation rod provided in an inclined direction, and a plurality of the divided pipe bodies are arranged around the core body, and the drive rod fitting bodies constituting the adjacent divided pipe bodies face each other. The rod main body of the drive rod is inserted and fitted between the respective fitting grooves, the core body and the divided pipe bodies are engaged with each other via the drive rods, and the cylinder body of the core body is operated. By inserting the rod main body of the rod and engaging the engagement pins at both ends of each of the drive rods with the engagement grooves of the inner surface of each disk of the operation rod, the four types of members are integrated. Assemble and reciprocally rotate the operating rod within a predetermined angle, It is configured such that the diameter of the pipe body formed by each divided pipe body is changed by slightly moving the pipe in the radial direction and slightly moving each divided pipe body in the same direction. Expansion / contraction device for pipes.
径となった状態において、相隣接する分割管体の各分割
片の間に入り込んだ駆動ロッドのロッド本体の外側面
は、該分割片の外周面と同一円周上に位置して、全体の
外周面が完全な円筒面を形成していることを特徴とする
請求項１に記載の管体の拡縮径装置。2. The outer surface of the rod main body of the drive rod that has entered between the divided pieces of the adjacent divided pipe bodies in a state where the pipe body composed of a plurality of divided pipe bodies has the maximum diameter, The expansion / contraction device for a tubular body according to claim 1, wherein the outer peripheral surface of the divided piece is located on the same circumference as the outer peripheral surface, and the entire outer peripheral surface forms a perfect cylindrical surface.
パー管であることを特徴とする請求項１に記載の管体の
拡縮径装置。3. The expansion / contraction device for a tubular body according to claim 1, wherein the tubular body composed of a plurality of divided tubular bodies is a tapered tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28602593A JPH07112424A (en) | 1993-10-19 | 1993-10-19 | Tube diameter extending/contracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28602593A JPH07112424A (en) | 1993-10-19 | 1993-10-19 | Tube diameter extending/contracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07112424A true JPH07112424A (en) | 1995-05-02 |
Family
ID=17699007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28602593A Pending JPH07112424A (en) | 1993-10-19 | 1993-10-19 | Tube diameter extending/contracting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07112424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105690545A (en) * | 2016-04-07 | 2016-06-22 | 广州三环新材料有限责任公司 | Core and ceramic core inserting mold with core |
| CN111071912A (en) * | 2020-01-03 | 2020-04-28 | 中国十七冶集团有限公司 | Portable device for assisting in transporting and installing small-space pipeline |
-
1993
- 1993-10-19 JP JP28602593A patent/JPH07112424A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105690545A (en) * | 2016-04-07 | 2016-06-22 | 广州三环新材料有限责任公司 | Core and ceramic core inserting mold with core |
| CN111071912A (en) * | 2020-01-03 | 2020-04-28 | 中国十七冶集团有限公司 | Portable device for assisting in transporting and installing small-space pipeline |
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