JP3516750B2 - Method for branching thermoplastic resin pipe and mold for branching - Google Patents
Method for branching thermoplastic resin pipe and mold for branchingInfo
- Publication number
- JP3516750B2 JP3516750B2 JP31886194A JP31886194A JP3516750B2 JP 3516750 B2 JP3516750 B2 JP 3516750B2 JP 31886194 A JP31886194 A JP 31886194A JP 31886194 A JP31886194 A JP 31886194A JP 3516750 B2 JP3516750 B2 JP 3516750B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- head
- thermoplastic resin
- branching
- resin pipe
- 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
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱可塑性樹脂管の分岐
加工用方法、ならびに、その分岐加工用方法に適した分
岐加工用金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for branching a thermoplastic resin pipe, and a die for branching suitable for the method for branching.
【０００２】[0002]
【従来の技術】熱可塑性樹脂管に分岐部を形成する場合
に、外面が半球面あるいは円錐面で形成されている頭部
と、この頭部の外面と同径の円周面で外側面が形成され
ている胴部と、で構成され、前記頭部に引き上げ装置に
係止可能な係止部材が設けられている金型を用いた加工
方法が、従来から多く採用されている。この方法は、熱
可塑性樹脂管の管壁に孔を設け、その孔の周縁部を加熱
軟化させた後、前記金型を、前記熱可塑性樹脂管の内側
に頭部を上にして挿入すると共に、前記金型の頭部が前
記孔から見える位置まで移動させ、前記金型の係止部材
を前記孔から引き上げ装置に係止させ、この引き上げ装
置によって、前記金型を前記孔から引き上げることによ
って分岐部を形成する方法である。2. Description of the Related Art When forming a branched portion in a thermoplastic resin pipe, a head whose outer surface is a hemispherical surface or a conical surface, and a circumferential surface having the same diameter as the outer surface of the head have an outer surface. 2. Description of the Related Art Conventionally, a processing method using a mold, which is composed of a formed body portion and in which a locking member that can be locked to a pulling device is provided on the head portion, has been widely adopted from the past. In this method, a hole is provided in the pipe wall of the thermoplastic resin pipe, the peripheral portion of the hole is heated and softened, and then the mold is inserted inside the thermoplastic resin pipe with its head facing up. By moving the head of the mold to a position visible through the hole, locking the locking member of the mold with the pulling device from the hole, and pulling the mold from the hole by the pulling device. This is a method of forming a branched portion.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
分岐加工方法では、金型を、熱可塑性樹脂管の内側に頭
部を上にして挿入していたために、熱可塑性樹脂管の内
側に挿入できる金型の大きさがかなり制限されてしま
い、分岐加工しようとする熱可塑性樹脂管の管口径より
もかなり小さい口径の分岐部しか形成することができな
いという問題があった。However, in the conventional branching method, since the mold is inserted inside the thermoplastic resin tube with its head facing upward, it can be inserted inside the thermoplastic resin tube. The size of the mold is considerably limited, and there is a problem that only a branch portion having a diameter considerably smaller than the diameter of the thermoplastic resin tube to be branched can be formed.
【０００４】ちなみに、本願出願人は、先に、外側に円
周面を有する金型を縦に半割りし、それらの半割金型部
品を、分割面で互いに上下方向にスライド可能に結合さ
せた金型を提案している（特開平４−１５３００９号公
報参照）。すなわち、この金型では、分岐部を熱可塑性
樹脂管の軸心に対して斜めに形成する場合に、２つの半
割金型部品を上下方向にずらした状態で熱可塑性樹脂管
の孔から引き抜くことにより、金型に必要な軸方向の長
さを確保できるようになっている。しかしながら、この
金型は、分岐部を熱可塑性樹脂管の軸心に対して斜めに
形成する場合には、分岐部の口径を熱可塑性樹脂管の管
口径に近付ける上で有効であるものの、分岐部を熱可塑
性樹脂管の軸心に対して直角に形成する場合には効果を
発揮するものではない。Incidentally, the applicant of the present invention first divides a mold having an outer circumferential surface into halves vertically, and joins these half-divided mold parts so as to be slidable in the vertical direction on the dividing surfaces. Another mold has been proposed (see Japanese Patent Laid-Open No. 4-153,094). That is, in this mold, when the branch portion is formed obliquely with respect to the axis of the thermoplastic resin pipe, the two half mold parts are pulled out from the hole of the thermoplastic resin pipe while being vertically displaced. As a result, the axial length required for the mold can be secured. However, this mold is effective in bringing the diameter of the branched portion closer to the pipe diameter of the thermoplastic resin pipe when the branched portion is formed obliquely with respect to the axis of the thermoplastic resin pipe. It is not effective when the portion is formed at right angles to the axis of the thermoplastic resin tube.
【０００５】そこで、本発明は、上記のような問題に着
目し、分岐加工しようとする熱可塑性樹脂管の管口径と
ほぼ同径の分岐部を熱可塑性樹脂管の軸心に対して直角
に形成することができる分岐加工方法ならびに分岐加工
用金型を提供することを目的としている。Therefore, in the present invention, focusing on the above problems, a branch portion having a diameter substantially the same as the pipe diameter of the thermoplastic resin pipe to be branched is formed at right angles to the axis of the thermoplastic resin pipe. An object of the present invention is to provide a branching method and a branching mold that can be formed.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明請求項１記載の分岐加工方法では、外面が半
球面あるいは円錐面で形成されている頭部と、この頭部
の外面と同径の円周面で外側面が形成されている胴部
と、で構成され、前記頭部に引き上げ装置に、係止可能
な係止部材が設けられている金型を用いた熱可塑性樹脂
管の分岐加工方法において、熱可塑性樹脂管の管壁に孔
を開け、その孔の周縁部を加熱軟化させ、胴部の外径が
前記熱可塑性樹脂管の内径とほぼ同径の金型を、前記熱
可塑性樹脂管の内面に前記胴部の外側面が沿う向きで挿
入すると共に、前記金型の頭部が前記孔から見える位置
まで移動させ、前記金型の係止部材を前記孔から引き上
げ装置に係止させ、この引き上げ装置によって、前記胴
部の軸心が前記熱可塑性樹脂管の軸心に対して直角にな
るまで前記金型を前記熱可塑性樹脂管の内側で９０度回
転させながら前記孔から熱可塑性樹脂管の軸心に対して
直角に引き上げることによって分岐部を形成する方法と
した。In order to achieve the above object, in the branching method according to the first aspect of the present invention, the outer surface is a hemispherical surface or a conical surface, and the outer surface of the head. And a body whose outer surface is formed by a circumferential surface having the same diameter as that of the above. In the branching method of a resin pipe, a hole is made in the pipe wall of the thermoplastic resin pipe, the peripheral portion of the hole is heated and softened, and the outer diameter of the body is approximately the same as the inner diameter of the thermoplastic resin pipe. Is inserted into the inner surface of the thermoplastic resin tube in a direction along which the outer surface of the body portion extends, and the head of the mold is moved to a position visible from the hole, and the locking member of the mold is inserted into the hole. To the pulling device, and by this pulling device, the shaft center of the body can be heated. Branch part by pulling the mold from the hole at right angles to the axis of the thermoplastic resin tube while rotating the mold 90 degrees inside the thermoplastic resin tube until it becomes perpendicular to the axis of the thermoplastic resin tube. Was used.
【０００７】なお、上記分岐加工方法としては、外面が
半球面あるいは円錐面で形成されている頭部と、この頭
部の外面と同径の円周面で外側面が形成されている胴部
と、で構成され、前記頭部の先端に、引き上げ装置に係
止する係止部材が設けられている金型において、前記胴
部が、その端面の中心を通り前記胴部の軸心に対して40
〜50度傾斜した傾斜面で切断した形状に形成されている
金型を用いることが好ましい。As the above branching method, a head having an outer surface formed of a hemispherical surface or a conical surface, and a body having an outer surface formed of a circumferential surface having the same diameter as the outer surface of the head. In a mold having a locking member for locking a pulling device provided at the tip of the head, the body portion passes through the center of the end face with respect to the axis of the body portion. 40
It is preferable to use a mold formed in a shape cut by an inclined surface inclined by -50 degrees.
【０００８】また、この金型の係止部材は、前記頭部の
接線方向に対して直角に立設している立設状態と、前記
胴部の傾斜面とは反対側を向いて前記頭部の接線方向に
倒れている横倒し状態との間で回動可能に取り付けられ
ているか、あるいは、前記頭部の先端と、前記頭部の下
端の前記胴部の傾斜面とは反対側位置との間で前記頭部
の表面に沿って移動可能に取り付けられていることが好
ましい。Further, the locking member of this mold has a standing state in which it is erected at right angles to the tangential direction of the head portion, and the head member faces the side opposite to the inclined surface of the body portion. Is rotatably mounted between the tangential direction of the portion and a sideways lying state, or a position opposite to the tip of the head and the inclined surface of the body at the lower end of the head. It is preferably mounted movably along the surface of the head between.
【０００９】[0009]
【作用】本発明請求項２記載の分岐加工用金型を用いて
熱可塑性樹脂管に分岐部を形成する場合には、まず、金
型の胴部の直径とほぼ等しい内径の熱可塑性樹脂管の管
壁に前記胴部よりも小さい径の孔を開け、その孔の周縁
部を加熱軟化させ、前記金型を、前記熱可塑性樹脂管の
内面に胴部の外側面が沿う向きで挿入すると共に、前記
金型の頭部が前記孔から見える位置まで移動させる。そ
して、前記金型の傾斜面を前記孔の反対側に向けた状態
で前記金型の係止部材を前記孔から引き上げ装置に係止
させ、この引き上げ装置によって、前記胴部の軸心が前
記熱可塑性樹脂管の軸心に対して直角になるまで前記金
型を前記熱可塑性樹脂管の内側で９０度回転させながら
前記孔から熱可塑性樹脂管の軸心に対して直角に引き上
げることによって分岐部を形成する。When a branch portion is formed in a thermoplastic resin pipe by using the branching die according to the second aspect of the present invention, first, the thermoplastic resin pipe having an inner diameter substantially equal to the diameter of the body portion of the die. A hole having a diameter smaller than that of the body is opened in the tube wall, the peripheral portion of the hole is heated and softened, and the mold is inserted into the inner surface of the thermoplastic resin tube with the outer surface of the body aligned. At the same time, the mold head is moved to a position visible from the hole. Then, with the inclined surface of the mold facing the opposite side of the hole, the locking member of the mold is locked from the hole to the pulling device, and by this pulling device, the axial center of the body is Branch by pulling the mold from the hole at a right angle to the axis of the thermoplastic resin tube while rotating the mold by 90 degrees inside the thermoplastic resin tube until it becomes perpendicular to the axis of the thermoplastic resin tube. To form a part.
【００１０】つまり、本発明請求項２記載の分岐加工用
金型にあっては、胴部が、その端面の中心を通り前記胴
部の軸心に対して40〜50度傾斜した傾斜面で切断した形
状に形成されているので、上述のようにして、前記金型
の傾斜面を前記孔の反対側に向けた状態で前記金型の係
止部材を前記孔から引き上げ装置に係止させることによ
り、胴部全体の高さ寸法を頭部の半径よりも大きくして
も、前記金型を前記熱可塑性樹脂管の内側で９０度回転
させる時に胴部の端部が熱可塑性樹脂管の内面に緩衝し
ないようにすることができる。That is, in the branching die according to the second aspect of the present invention, the barrel has an inclined surface which passes through the center of the end face and is inclined by 40 to 50 degrees with respect to the axis of the barrel. Since it is formed in a cut shape, as described above, the locking member of the mold is locked from the hole to the pulling device with the inclined surface of the mold facing the opposite side of the hole. As a result, even if the height of the entire body is made larger than the radius of the head, the end of the body is made of the thermoplastic resin pipe when the mold is rotated 90 degrees inside the thermoplastic resin pipe. The inner surface can be buffered.
【００１１】また、胴部全体の高さ寸法を頭部の半径よ
りも大きくすると、分岐加工において、熱可塑性樹脂管
の孔の周縁部を立ち上げる時に胴部の外側面が長くガイ
ドの機能を発揮できるので、引き抜き時の金型の状態が
安定すると共に、分岐部の形状も安定する。When the height of the entire body is made larger than the radius of the head, the outer surface of the body is long when the peripheral edge of the hole of the thermoplastic resin pipe is raised during branching, and the body functions as a guide. Since it can be exhibited, the state of the mold at the time of drawing is stable, and the shape of the branch portion is also stable.
【００１２】更に、本発明請求項３記載の分岐加工用金
型を用いると、この金型の係止部材を引き上げ装置に係
止させる時に、前記係止部材を回動させて横倒し状態に
してから引き上げ装置に係止させることができるので、
小さい引き上げ幅で分岐部を形成することができる。Further, when the die for branching processing according to claim 3 of the present invention is used, when the engaging member of the die is engaged with the pulling device, the engaging member is turned to be in a laterally laid state. Since it can be locked from the pulling device,
The branch portion can be formed with a small pulling width.
【００１３】また、本発明請求項４記載の分岐加工用金
型を用いると、この金型の係止部材を引き上げ装置に係
止させる時に、前記係止部材を頭部の下端位置に移動さ
せてから引き上げ装置に係止させることができるので、
小さい引き上げ幅で分岐部を形成することができる。ま
た、金型の引き上げ時には、金型の回転に伴って、係止
部材がスリットを頭部の下端位置から頭部の先端位置へ
と移動するので、この支点の移動によって金型が真上に
引っ張られることになり、引っ張り応力が孔の周縁部に
均一に作用する。When the die for branching according to claim 4 of the present invention is used, when the engaging member of the die is engaged with the lifting device, the engaging member is moved to the lower end position of the head. Since it can be locked to the lifting device after
The branch portion can be formed with a small pulling width. Further, when the mold is pulled up, the locking member moves the slit from the lower end position of the head to the distal end position of the head as the mold rotates, so that the mold moves directly above the fulcrum. As a result, the tensile stress acts evenly on the peripheral portion of the hole.
【００１４】[0014]
【実施例】以下、図面に基づいて実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings.
【００１５】まず、本発明請求項３記載の分岐加工用金
型に対応する実施例１と、本発明請求項４記載の分岐加
工用金型に対応する実施例２について詳述する。First, a first embodiment corresponding to a branching mold according to claim 3 of the present invention and a second embodiment corresponding to a branching mold according to claim 4 of the present invention will be described in detail.
【００１６】実施例１の分岐加工用金型Ａは、図１に示
すように、外面が半球面で形成されている頭部１と、こ
の頭部１の外面と同径の円周面で外側面が形成されてい
る胴部２と、で構成され、前記頭部１の先端が、前記胴
部２の軸心Ｘ−Ｘに対して直交する平面１０で切断され
た形状に形成されていると共に、前記胴部２が、その端
面２０の中心を通り前記胴部２の軸心Ｘ−Ｘに対して40
〜50度傾斜した傾斜面２１で切断した形状に形成されて
いる。As shown in FIG. 1, the branching die A of Example 1 includes a head 1 having an outer surface formed of a hemispherical surface and a circumferential surface having the same diameter as the outer surface of the head 1. A body portion 2 having an outer side surface formed thereon, and the tip of the head portion 1 is formed in a shape cut along a plane 10 orthogonal to the axis XX of the body portion 2. In addition, the body portion 2 passes through the center of the end face 20 of the body portion 40 with respect to the axis XX of the body portion 2.
It is formed in a shape cut by an inclined surface 21 inclined by -50 degrees.
【００１７】また、前記金型Ａは、引き上げ装置（図示
省略）に係止可能な係止部材３が、支持片３１を介して
前記頭部１の先端（平面１０の中心）にヒンジ結合され
ており、前記頭部１の接線方向に対して直角に立設して
いる立設状態（実線で示した状態）と、前記胴部２の傾
斜面２１とは反対側を向いて前記頭部１の接線方向に倒
れている横倒し状態（二点鎖線で示した状態）と、の間
で回動可能になっている。なお、前記係止部材３の回動
中心は、頭部１の球面の延長線Ｋと胴部２の軸心Ｘ−Ｘ
とが交差する点に配置されている。また、前記胴部２
は、その高さ寸法Ｈが、頭部１の半径Ｒよりも長く胴部
２の直径Φよりも短くなるように形成されている。Further, in the mold A, a locking member 3 that can be locked by a pulling device (not shown) is hinged to the tip of the head 1 (center of the plane 10) via a support piece 31. And the standing state (the state shown by the solid line) standing upright to the tangential direction of the head portion 1 and the head portion facing the side opposite to the inclined surface 21 of the body portion 2. It can be rotated between a sideways lying state (indicated by a chain double-dashed line) which is lying in the tangential direction of 1. The center of rotation of the locking member 3 is the extension line K of the spherical surface of the head 1 and the axis XX of the body 2.
It is located at the intersection of and. Also, the body 2
Is formed such that its height dimension H is longer than the radius R of the head portion 1 and shorter than the diameter Φ of the body portion 2.
【００１８】実施例２の分岐加工用金型Ｂは、図２なら
びに図３に示すように、外面が半球面で形成されている
頭部４と、この頭部４の外面と同径の円周面で外側面が
形成されている胴部５と、で構成され、前記胴部５が、
その端面５０の中心を通り前記胴部５の軸心Ｘ−Ｘに対
して40〜50度傾斜した傾斜面５１で切断した形状に形成
されている。また、前記金型Ｂは、中空状に形成されて
いて、頭部４にはスリット４１が設けられており、この
スリット４１には、引き上げ装置（図示省略）に係止可
能な係止部材６が滑車６１を介して取り付けられてい
る。前記スリット４１は、前記頭部４の先端から、前記
頭部４の下端の前記胴部５の傾斜面５１とは反対側位置
までの間で形成されており、前記係止部材６は、このス
リット４１に沿って移動可能になっている。なお、前記
スリット４１が設けられている部分の内面は、頭部４の
外面よりも曲率が小さい面で形成されている。また、前
記胴部５は、その高さ寸法Ｈが、頭部４の半径Ｒよりも
長く胴部２の直径Φよりも短くなるように形成されてい
る。As shown in FIGS. 2 and 3, the branching mold B according to the second embodiment has a head 4 having a hemispherical outer surface and a circle having the same diameter as the outer surface of the head 4. And a body portion 5 having an outer surface formed on a peripheral surface thereof.
It is formed in a shape cut by an inclined surface 51 that passes through the center of the end surface 50 and is inclined by 40 to 50 degrees with respect to the axis XX of the body portion 5. Further, the mold B is formed in a hollow shape, and the head 4 is provided with a slit 41, and in this slit 41, a locking member 6 that can be locked by a pulling device (not shown). Is attached via a pulley 61. The slit 41 is formed between the tip of the head 4 and a position of the lower end of the head 4 on the side opposite to the inclined surface 51 of the body 5, and the locking member 6 is It is movable along the slit 41. The inner surface of the portion where the slit 41 is provided is formed to have a smaller curvature than the outer surface of the head 4. Further, the body portion 5 is formed such that its height dimension H is longer than the radius R of the head portion 4 and shorter than the diameter Φ of the body portion 2.
【００１９】次に、図４〜図９に基づいて、実施例１の
分岐加工用金型Ａを用いた熱可塑性樹脂管Ｐの分岐加工
方法について説明する。Next, a branching method of the thermoplastic resin pipe P using the branching mold A of Example 1 will be described with reference to FIGS. 4 to 9.
【００２０】前記分岐加工用金型Ａを用いて熱可塑性樹
脂管Ｐを分岐加工する場合には、まず、図４に示すよう
に、前記金型Ａの胴部２の外径とほぼ等しい内径を有す
る熱可塑性樹脂管Ｐの管壁に、前記胴部２の外径よりも
小さい径の孔Ｐ０を開ける。なお、前記孔Ｐ０の形状
は、円形にしもよいし、熱可塑性樹脂管Ｐの軸方向に長
い長円にしてもよい。When the thermoplastic resin pipe P is branched using the branching mold A, first, as shown in FIG. 4, an inner diameter substantially equal to the outer diameter of the body 2 of the mold A. A hole P0 having a diameter smaller than the outer diameter of the body portion 2 is formed in the pipe wall of the thermoplastic resin pipe P having. The shape of the hole P0 may be circular or may be an ellipse elongated in the axial direction of the thermoplastic resin pipe P.
【００２１】次に、その孔Ｐ０の周縁部を加熱軟化させ
る。加熱手段は、シリコンラバーヒーターやガスバーナ
ー等を用いることができるが、加熱範囲の安定性ならび
に加熱温度の均一性を考慮すると、図５に示すように、
シリコンラバーヒーターＲＨを熱可塑性樹脂管Ｐの内周
面と外周面の両方に接触させる方法が最適である。Next, the peripheral portion of the hole P0 is heated and softened. As the heating means, a silicon rubber heater, a gas burner, or the like can be used, but considering the stability of the heating range and the uniformity of the heating temperature, as shown in FIG.
The method of bringing the silicone rubber heater RH into contact with both the inner peripheral surface and the outer peripheral surface of the thermoplastic resin pipe P is optimal.
【００２２】上述のようにして孔Ｐ０の周縁部を加熱軟
化させた後は、前記金型Ａを、前記熱可塑性樹脂管Ｐの
内面に前記胴部２の外側面が沿う向きで挿入すると共
に、前記金型Ａの頭部１が前記孔Ｐ０から見える位置ま
で移動させる。なお、金型Ａを移動させるためには、図
６に示すように、金型Ａの係止部材３にチェーンＣを取
り付け、そのチェーンＣを熱可塑性樹脂管Ｐの開口端か
ら引っ張るとよい。After heating and softening the peripheral portion of the hole P0 as described above, the mold A is inserted into the inner surface of the thermoplastic resin pipe P in a direction along which the outer surface of the body portion 2 extends. , The head 1 of the mold A is moved to a position visible from the hole P0. In order to move the mold A, as shown in FIG. 6, a chain C may be attached to the locking member 3 of the mold A and the chain C may be pulled from the open end of the thermoplastic resin pipe P.
【００２３】次に、図７に示すように、金型Ａの傾斜面
２１を前記孔Ｐ０の反対側に向けた状態で係止部材３を
前記孔Ｐ０から引き上げ装置（図示省略）に係止させ
る。この時、前記係止部材３を回動させて横倒し状態に
してから引き上げ装置に係止させる。Next, as shown in FIG. 7, the locking member 3 is locked from the hole P0 to a lifting device (not shown) with the inclined surface 21 of the mold A facing the opposite side of the hole P0. Let At this time, the locking member 3 is rotated to make it fall sideways and then locked by the pulling device.
【００２４】上述のようにして係止部材３を引き上げ装
置に係止させたら、図８に示すように、この引き上げ装
置によって、前記胴部２の軸心Ｘ−Ｘが前記熱可塑性樹
脂管Ｐの軸心に対して直角になるまで前記金型Ａを前記
熱可塑性樹脂管Ｐの内側で９０度回転させながら前記孔
Ｐ０から熱可塑性樹脂管Ｐの軸心に対して直角に引き上
げることによって分岐部Ｐ１を形成する。なお、前記金
型Ａは、熱可塑性樹脂管Ｐから完全に引き抜いてもよい
し、分岐部Ｐ１が固化した後に熱可塑性樹脂管Ｐ内に押
し戻してもよい。When the locking member 3 is locked to the pulling device as described above, as shown in FIG. 8, the axial center XX of the body portion 2 is moved by the pulling device as shown in FIG. The mold A is rotated by 90 degrees inside the thermoplastic resin pipe P until it becomes a right angle with respect to the axis of the thermoplastic resin pipe P. The part P1 is formed. The mold A may be completely pulled out from the thermoplastic resin pipe P, or may be pushed back into the thermoplastic resin pipe P after the branch portion P1 is solidified.
【００２５】このようにすることによって、分岐加工し
ようとする熱可塑性樹脂管Ｐの管口径とほぼ同径の分岐
部Ｐ１を熱可塑性樹脂管Ｐの軸心に対して直角に形成す
ることができる。By doing so, a branch portion P1 having a diameter substantially the same as the pipe diameter of the thermoplastic resin pipe P to be branched can be formed at right angles to the axis of the thermoplastic resin pipe P. .
【００２６】また、図９は、金型Ａが熱可塑性樹脂管Ｐ
の内側で９０度回転する時の動きを示している。この図
に示したように、前記金型Ａは、胴部２全体の高さ寸法
Ｈが頭部１の半径Ｒより大きいにも関わらず、前記熱可
塑性樹脂管Ｐの内側で９０度回転させる時に胴部２の端
部が熱可塑性樹脂管Ｐの内面に緩衝しない。また、胴部
２全体の高さ寸法Ｈを頭部１の半径Ｒよりも大きくした
ことによって、熱可塑性樹脂管Ｐの孔Ｐ０の周縁部を立
ち上げる時に胴部２の外側面が長くガイドの機能を発揮
できるので、引き抜き時の金型Ｐの状態が安定すると共
に、分岐部Ｐ１の形状も安定する。Further, in FIG. 9, the mold A is a thermoplastic resin pipe P.
It shows the movement when rotating 90 degrees inside the. As shown in this figure, the mold A is rotated 90 degrees inside the thermoplastic resin pipe P, even though the height dimension H of the entire body portion 2 is larger than the radius R of the head portion 1. Sometimes the end of the body portion 2 does not cushion the inner surface of the thermoplastic resin pipe P. Further, by making the height dimension H of the entire body portion 2 larger than the radius R of the head portion 1, the outer side surface of the body portion 2 is long when the peripheral portion of the hole P0 of the thermoplastic resin pipe P is raised. Since the function can be exerted, the state of the die P at the time of pulling out is stable, and the shape of the branch portion P1 is also stable.
【００２７】更に、前記係止部材３を回動させて横倒し
状態にしてから引き上げ装置に係止させることができる
ので、小さい引き上げ幅で分岐部Ｐ１を形成することが
できる。Furthermore, since the locking member 3 can be turned to a sideways state and then locked by the pulling device, the branch portion P1 can be formed with a small pulling width.
【００２８】次に、図１０〜図１３に基づいて、実施例
２の分岐加工用金型Ｂを用いた熱可塑性樹脂管Ｐの分岐
加工方法について説明する。Next, a branching method of the thermoplastic resin pipe P using the branching mold B of Example 2 will be described with reference to FIGS. 10 to 13.
【００２９】前記分岐加工用金型Ｂを用いて熱可塑性樹
脂管Ｐを分岐加工する場合には、まず、前述の方法と同
様にして、孔Ｐ０の周縁部を加熱軟化させるところまで
を行う。When the thermoplastic resin pipe P is branched using the branching mold B, first, the peripheral portion of the hole P0 is heated and softened in the same manner as described above.
【００３０】その後、前記金型Ｂを、前記熱可塑性樹脂
管Ｐの内面に前記胴部５の外側面が沿う向きで挿入する
と共に、前記金型Ｐの頭部４が前記孔Ｐ０から見える位
置まで移動させる。なお、金型Ｂを移動させる時は、図
１０に示すように、金型Ｂの係止部材６にチェーンＣの
一端を取り付け、そのチェーンＣを熱可塑性樹脂管Ｐの
開口端から引っ張るとよい。Thereafter, the mold B is inserted into the inner surface of the thermoplastic resin pipe P in a direction along which the outer surface of the body portion 5 extends, and the head 4 of the mold P is seen from the hole P0. Move to. When moving the mold B, as shown in FIG. 10, one end of the chain C may be attached to the locking member 6 of the mold B and the chain C may be pulled from the open end of the thermoplastic resin pipe P. .
【００３１】次に、図１１に示すように、前記金型Ｂの
傾斜面５１を前記孔Ｐ０の反対側に向けた状態で係止部
材６を前記孔Ｐ０から引き上げ装置（図示省略）に係止
させる。この時、前記係止部材６を頭部４の下端位置に
移動させてから引き上げ装置に係止させる。Next, as shown in FIG. 11, with the inclined surface 51 of the mold B facing the opposite side of the hole P0, the locking member 6 is engaged with the pulling device (not shown) from the hole P0. Stop it. At this time, the locking member 6 is moved to the lower end position of the head 4 and then locked by the pulling device.
【００３２】上述のようにして係止部材６を引き上げ装
置に係止させたら、図１２に示すように、この引き上げ
装置によって、前記胴部５の軸心Ｘ−Ｘが前記熱可塑性
樹脂管Ｐの軸心に対して直角になるまで前記金型Ｂを前
記熱可塑性樹脂管Ｐの内側で９０度回転させながら前記
孔Ｐ０から熱可塑性樹脂管Ｐの軸心に対して直角に引き
上げることによって分岐部Ｐ１を形成する。When the locking member 6 is locked to the pulling device as described above, as shown in FIG. 12, the shaft center XX of the body portion 5 is moved by the pulling device as shown in FIG. Branch by pulling the mold B from the hole P0 at right angles to the axis of the thermoplastic resin pipe P while rotating the mold B by 90 degrees inside the thermoplastic resin pipe P until it becomes perpendicular to the axis of the thermoplastic resin pipe P. The part P1 is formed.
【００３３】なお、前記金型Ｂは、熱可塑性樹脂管Ｐか
ら完全に引き抜いてもよいし、分岐部Ｐ１が固化した後
に熱可塑性樹脂管Ｐ内に押し戻してもよい。The mold B may be completely pulled out from the thermoplastic resin pipe P, or may be pushed back into the thermoplastic resin pipe P after the branch portion P1 is solidified.
【００３４】このようにすることによって、分岐加工し
ようとする熱可塑性樹脂管Ｐの管口径とほぼ同径の分岐
部Ｐ１を熱可塑性樹脂管Ｐの軸心に対して直角に形成す
ることができる。By doing so, the branch portion P1 having substantially the same diameter as the pipe diameter of the thermoplastic resin pipe P to be branched can be formed at right angles to the axis of the thermoplastic resin pipe P. .
【００３５】また、図１３は、金型Ｂが熱可塑性樹脂管
Ｐの内側で９０度回転する時の動きを示している。この
図に示したように、前記金型Ｂは、胴部５全体の高さ寸
法Ｈが頭部４の半径Ｒより大きいにも関わらず、前記熱
可塑性樹脂管Ｐの内側で９０度回転させる時に胴部５の
端部が熱可塑性樹脂管Ｐの内面に緩衝しない。また、胴
部５全体の高さ寸法Ｈを頭部４の半径Ｒよりも大きくし
たことによって、熱可塑性樹脂管Ｐの孔Ｐ０の周縁部を
立ち上げる時に胴部５の外側面が長くガイドの機能を発
揮できるので、引き抜き時の金型Ｂの状態が安定すると
共に、分岐部Ｐ１の形状も安定する。FIG. 13 shows the movement of the mold B when it is rotated 90 degrees inside the thermoplastic resin pipe P. As shown in this figure, the mold B is rotated by 90 degrees inside the thermoplastic resin pipe P, even though the height dimension H of the entire body portion 5 is larger than the radius R of the head portion 4. Sometimes the end of the body portion 5 does not cushion the inner surface of the thermoplastic resin pipe P. Further, by making the height dimension H of the entire body portion 5 larger than the radius R of the head portion 4, the outer surface of the body portion 5 is long when the peripheral portion of the hole P0 of the thermoplastic resin pipe P is raised. Since the function can be exhibited, the state of the mold B at the time of pulling out is stable, and the shape of the branch portion P1 is also stable.
【００３６】更に、前記係止部材６を頭部４の下端位置
に移動させてから引き上げ装置に係止させることができ
るので、小さい引き上げ幅で分岐部Ｐ１を形成すること
ができる。Further, since the locking member 6 can be moved to the lower end position of the head 4 and then locked by the pulling device, the branch portion P1 can be formed with a small pulling width.
【００３７】また、金型Ｂの引き上げ時には、金型Ｂの
回転に伴って、係止部材３がスリット４１を頭部４の下
端位置から頭部４の先端位置へと移動するので、この支
点の移動によって金型Ｂが真上に引っ張られることにな
り、引っ張り応力が孔ＰＯの周縁部に均一に作用する。
つまり、熱可塑性樹脂管Ｐに負担をかけずに無理なく金
型Ｂを引き抜くことができる。また、前記スリット４１
が設けられている部分の内面が頭部４の外面よりも曲率
が小さい面で形成されているので、係止部材６が、スリ
ット４１に沿ってスムーズに移動する。このことも、熱
可塑性樹脂管Ｐに負担をかけずに無理なく金型Ｂを引き
抜く上で効果的となっている。When the mold B is pulled up, the locking member 3 moves the slit 41 from the lower end position of the head 4 to the distal end position of the head 4 as the mold B rotates. Moves to pull the mold B right above, and the tensile stress uniformly acts on the peripheral edge of the hole PO.
That is, the mold B can be pulled out without imposing a burden on the thermoplastic resin pipe P. In addition, the slit 41
Since the inner surface of the portion provided with is formed to have a smaller curvature than the outer surface of the head 4, the locking member 6 moves smoothly along the slit 41. This is also effective in reasonably pulling out the mold B without imposing a burden on the thermoplastic resin pipe P.
【００３８】以上、本発明の実施例を図面により詳述し
てきたが、具体的な構成はこの実施例に限られるもので
はなく、本発明の要旨を逸脱しない範囲における設計の
変更等があっても本発明に含まれる。例えば、実施例で
は、熱可塑性樹脂管の内部に挿入した金型を移動させる
時に、係止治具にチェーンの一端を取り付けて、そのチ
ェーンを引っ張る方法を示したが、金型を後から押して
移動させるようにしてもよい。Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific structure is not limited to this embodiment, and there are design changes and the like within a range not departing from the gist of the present invention. Also included in the present invention. For example, in the example, when moving the mold inserted into the thermoplastic resin tube, one end of the chain was attached to the locking jig and the chain was pulled, but the mold was pushed afterwards. You may make it move.
【００３９】[0039]
【発明の効果】以上説明したように、本発明請求項１記
載の分岐加工方法にあっては、胴部の外径が、分岐加工
しようとする熱可塑性樹脂管の内径とほぼ同径の金型を
用いているので、熱可塑性樹脂管の管口径とほぼ同径の
分岐部を熱可塑性樹脂管の軸心に対して直角に形成する
ことができるという効果が得られる。As described above, in the branching method according to the first aspect of the present invention, the outer diameter of the body portion is substantially the same as the inner diameter of the thermoplastic resin pipe to be branched. Since the mold is used, it is possible to obtain an effect that a branch portion having substantially the same diameter as the pipe diameter of the thermoplastic resin pipe can be formed at a right angle to the axis of the thermoplastic resin pipe.
【００４０】また、請求項２記載の分岐加工用金型にあ
っては、胴部が、その端面の中心を通り前記胴部の軸心
に対して40〜50度傾斜した傾斜面で切断した形状に形成
されているので、胴部全体の高さ寸法を頭部の半径より
も大きくすることができる。そうすることにより、分岐
加工において、熱可塑性樹脂管の孔Ｐ０の周縁部を立ち
上げる時に胴部の外側面が長くガイドの機能を発揮でき
るので、引き抜き時の金型の状態が安定すると共に、分
岐部の形状も安定するという効果が得られる。Further, in the branching die according to the second aspect, the body is cut along an inclined surface which passes through the center of the end face and is inclined by 40 to 50 degrees with respect to the axis of the body. Since it is formed in a shape, the height dimension of the entire body can be made larger than the radius of the head. By doing so, in the branching process, the outer surface of the body portion is long when the peripheral portion of the hole P0 of the thermoplastic resin pipe is raised, and the function of the guide can be exerted, so that the state of the mold at the time of drawing is stable and The effect that the shape of the branch portion is also stable is obtained.
【００４１】また、請求項３記載の分岐加工用金型にあ
っては、小さい引き上げ幅で分岐部を形成することがで
き、請求項４記載の分岐加工用金型にあっては、小さい
引き上げ幅で分岐部を形成することができると共に、金
型の引き上げ時に、熱可塑性樹脂管に負担をかけずに無
理なく金型を引き抜くことができるという効果も得られ
る。Further, in the branching die according to claim 3 , the branching portion can be formed with a small pulling width, and in the branching die according to claim 4 , the pulling up is small. It is possible to form the branched portion with a width, and at the time of pulling up the mold, it is possible to pull out the mold without giving a load to the thermoplastic resin tube without difficulty.
【図１】実施例１の分岐加工用金型を示す正面図であ
る。FIG. 1 is a front view showing a branching mold of Example 1. FIG.
【図２】実施例２の分岐加工用金型を示す正面図であ
る。FIG. 2 is a front view showing a branching mold of Example 2.
【図３】実施例２の分岐加工用金型を示す断面図であ
る。FIG. 3 is a cross-sectional view showing a branching mold of Example 2.
【図４】実施例１の分岐加工用金型を用いた分岐加工方
法の説明図である。FIG. 4 is an explanatory diagram of a branching method using the branching mold of Example 1.
【図５】実施例１の分岐加工用金型を用いた分岐加工方
法の説明図である。FIG. 5 is an explanatory view of a branching method using the branching mold of Example 1.
【図６】実施例１の分岐加工用金型を用いた分岐加工方
法の説明図である。FIG. 6 is an explanatory diagram of a branching method using the branching mold of Example 1.
【図７】実施例１の分岐加工用金型を用いた分岐加工方
法の説明図である。FIG. 7 is an explanatory view of a branching method using the branching mold of Example 1.
【図８】実施例１の分岐加工用金型を用いた分岐加工方
法の説明図である。FIG. 8 is an explanatory diagram of a branching method using the branching mold of Example 1.
【図９】実施例１の分岐加工用金型の動きを示す図であ
る。FIG. 9 is a view showing the movement of the branching mold of Example 1.
【図１０】実施例２の分岐加工用金型を用いた分岐加工
方法の説明図である。FIG. 10 is an explanatory diagram of a branching method using the branching mold of Example 2.
【図１１】実施例２の分岐加工用金型を用いた分岐加工
方法の説明図である。FIG. 11 is an explanatory diagram of a branching method using the branching mold of Example 2.
【図１２】実施例２の分岐加工用金型を用いた分岐加工
方法の説明図である。FIG. 12 is an explanatory diagram of a branching method using the branching mold of Example 2.
【図１３】実施例２の分岐加工用金型の動きを示す図で
ある。FIG. 13 is a diagram showing the movement of the branching processing die according to the second embodiment.
Ａ，Ｂ 金型 １，４ 頭部 ２，５ 胴部 ２０，５０ 端面 ２１，５１ 傾斜面 ３，６ 係止部材 A, B mold 1,4 head 2,5 body 20,50 end face 21,51 inclined surface 3,6 locking member
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭49−63765（ＪＰ，Ａ) 特開 昭54−154475（ＪＰ，Ａ) 特開 平３−251429（ＪＰ，Ａ) 特開 平４−153009（ＪＰ，Ａ) 特開 平５−203090（ＪＰ，Ａ) 実開 平３−112326（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 51/00 - 51/46 B29C 57/00 - 57/12 B29D 23/00 - 23/24 F16L 41/00 - 41/18 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-49-63765 (JP, A) JP-A-54-154475 (JP, A) JP-A-3-251429 (JP, A) JP-A-4- 153009 (JP, A) JP 5-203090 (JP, A) Actual development 3-112326 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) B29C 51/00-51 / 46 B29C 57/00-57/12 B29D 23/00-23/24 F16L 41/00-41/18
Claims (4)
ている頭部と、この頭部の外面と同径の円周面で外側面
が形成されている胴部と、で構成され、前記頭部の先端
に、引き上げ装置に係止可能な係止部材が設けられてい
る金型を用いた熱可塑性樹脂管の分岐加工方法におい
て、 熱可塑性樹脂管の管壁に孔を開け、その孔の周縁部を加
熱軟化させ、胴部の外径が前記熱可塑性樹脂管の内径と
ほぼ同径の金型を、前記熱可塑性樹脂管の内面に前記胴
部の外側面が沿う向きで挿入すると共に、前記金型の頭
部が前記孔から見える位置まで移動させ、前記金型の係
止部材を前記孔から引き上げ装置に係止させ、この引き
上げ装置によって、前記胴部の軸心が前記熱可塑性樹脂
管の軸心に対して直角になるまで前記金型を前記熱可塑
性樹脂管の内側で９０度回転させながら前記孔から熱可
塑性樹脂管の軸心に対して直角に引き上げることによっ
て分岐部を形成することを特徴とする分岐加工方法。1. A head portion having an outer surface formed of a hemispherical surface or a conical surface, and a body portion having an outer surface formed of a circumferential surface having the same diameter as the outer surface of the head portion. In a method for branching a thermoplastic resin pipe using a mold in which an engaging member that can be engaged with a pulling device is provided at the tip of the head, a hole is formed in the pipe wall of the thermoplastic resin pipe, and the hole is formed. The outer peripheral surface of the body is heated and softened, and a die having an outer diameter of the body portion that is substantially the same as the inner diameter of the thermoplastic resin pipe is inserted into the inner surface of the thermoplastic resin pipe in a direction along which the outer surface of the body portion extends. At the same time, the head of the mold is moved to a position where it can be seen from the hole, and the locking member of the mold is locked from the hole to the pulling device, and the pulling device causes the axial center of the body to move to the heat source. Insert the mold into the thermoplastic resin tube until it is perpendicular to the axis of the plastic resin tube. Branch processing method characterized by forming the branch part by pulling perpendicularly from the hole while rotating 90 degrees to the axis of the thermoplastic resin pipe.
ている頭部と、この頭部の外面と同径の円周面で外側面
が形成されている胴部と、で構成され、前記頭部の先端
に、引き上げ装置に係止させる係止部材が設けられてい
る金型において、前記胴部が、その端面の中心を通り前
記胴部の軸心に対して40 〜 50 度傾斜した傾斜面で切断し
た形状に形成されていることを特徴とする分岐加工用金
型。2. A head portion having an outer surface formed of a hemispherical surface or a conical surface, and a body portion having an outer surface formed of a circumferential surface having the same diameter as the outer surface of the head portion. In a mold in which a locking member for locking a pulling device is provided at the tip of the head, the body part is inclined by 40 to 50 degrees with respect to the axis of the body part through the center of the end face. A branching die, which is formed in a shape cut along an inclined surface.
対して直角に立設している立設状態と、前記胴部の傾斜
面とは反対側を向いて前記頭部の接線方向に倒れている
横倒し状態との間で回動可能に取り付けられていること
を特徴とする請求項２記載の分岐加工用金型。3. The standing state in which the locking member stands upright at right angles to the tangential direction of the head, and the tangent line of the head facing away from the inclined surface of the body. The branching die according to claim 2, which is rotatably attached between a sideways state of being tilted in a direction.
記頭部の下端の前記胴部の傾斜面とは反対側位置との間
で前記頭部の表面に沿って移動可能に取り付けられてい
ることを特徴とする請求項２記載の分岐加工用金型。4. The locking member is movable along the surface of the head between the tip of the head and a position at the lower end of the head opposite to the inclined surface of the body. The die for branching according to claim 2, which is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31886194A JP3516750B2 (en) | 1994-12-21 | 1994-12-21 | Method for branching thermoplastic resin pipe and mold for branching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31886194A JP3516750B2 (en) | 1994-12-21 | 1994-12-21 | Method for branching thermoplastic resin pipe and mold for branching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08174647A JPH08174647A (en) | 1996-07-09 |
| JP3516750B2 true JP3516750B2 (en) | 2004-04-05 |
Family
ID=18103781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31886194A Expired - Fee Related JP3516750B2 (en) | 1994-12-21 | 1994-12-21 | Method for branching thermoplastic resin pipe and mold for branching |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3516750B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT247484Y1 (en) | 1999-07-22 | 2002-08-22 | Redi Spa | FITTING FOR THE CONSTRUCTION OF PIPES BRANCHES. |
-
1994
- 1994-12-21 JP JP31886194A patent/JP3516750B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08174647A (en) | 1996-07-09 |
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