JP4200057B2 - Pipe punching device - Google Patents

Pipe punching device Download PDF

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Publication number
JP4200057B2
JP4200057B2 JP2003173510A JP2003173510A JP4200057B2 JP 4200057 B2 JP4200057 B2 JP 4200057B2 JP 2003173510 A JP2003173510 A JP 2003173510A JP 2003173510 A JP2003173510 A JP 2003173510A JP 4200057 B2 JP4200057 B2 JP 4200057B2
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hole
punching device
screw
main body
sleeve member
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JP2005007507A (en
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和宏 山下
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株式会社日邦バルブ
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Description

【0001】
【産業上の利用分野】
本発明は水道或いはガスなどの配管に分岐用の孔を穿孔するための穿孔装置に関し、具体的に言えば、分岐用に配管に取付けられた分岐栓例えば分水栓に取付けて、該分水栓内に穿孔工具を通し、その穿孔工具で配管に孔を明ける穿孔装置に関する。さらに本発明は、特にポリエチレンなどの軟質管への穿孔に好適に使用することのできる管穿孔装置に関する。
【0002】
【従来の技術】
従来、水道或いはガス等の配管の途中において分岐管を取付ける場合がある。この場合、配管の所定の位置に分岐栓を取り付け、分岐栓内の流路に穿孔具を通して、流路に対応する位置でその配管に孔を明けることが行なわれるている。
【0003】
実用新案登録第2598493号に開示された穿孔装置では、内周面に雌ネジが形成された本体と、この雌ネジに螺合する雄ネジが外周面に形成され、それらネジが螺合した状態で回転操作されることにより、分岐路に沿って前後進する回転体と、この回転体に対して相対回転可能に連係された穿孔具とで穿孔装置を構成している。
【0004】
【特許文献1】
実用新案登録第2598493号公報(段落0007乃至0016、図1)。
【0005】
【発明が解決しようとする課題】
ところで上記実用新案では、回転体は本体に対して常に一定のピッチで回転しながら下降する。一般にこのような穿孔装置がセットされた場合、その穿孔具は配管表面から離れた位置にあり、回転体を回転させて先ず穿孔具を配管に当たる位置まで下げ、次いで実際の穿孔作業が行なわれる。この最初の移動の間は何等の穿孔作業は行なわず単なる下降移動であるから、作業能率の点からは高速で移動させたい。そのためにはネジのピッチを大きくすればよい。しかし、ねじのピッチを大きくしたばあい、実際に穿孔が始まると1回転当たりの穿孔具の配管への切込み深さが大きくなるので、穿孔作業に大きな力を要する。ネジのピッチを小さくすれば、穿孔に要する力は小さくなるが、今度は穿孔開始までに時間がかかり、作業能率が低下する。
【0006】
本願発明は、上記従来の問題点に鑑みなされたものであり、実際の穿孔開始前の工程での穿孔工具の移動速度を速くし、穿孔時には移動速度をより遅くして、トータル作業時間を短くして作業能率を高めると共に、穿孔に要する力を小さくして穿孔作業を楽に行なえる穿孔装置を提供することをその課題とする。
【0007】
【課題を解決するための手段】
上記課題を解決するために、本発明に係る管穿孔装置は、内部に分岐栓の分岐路に通じる貫通孔を備えた本体と、該本体に相対回転可能で相対軸方向移動不能に取付けられ、本体の貫通孔に通じる貫通孔を備え、該貫通孔にメネジが形成されたスリーブ部材を備える。そして本体とスリーブ部材との間に、限定された強さでスリーブ部材の本体に対する相対回転を阻止する回転阻止部材を配置する。そしてこの管穿孔装置は、さらに、スリーブ部材のメネジに螺合する第1のネジ部と、第1のネジ部の下側に形成された第2のネジ部とを備え、スリーブ部材の上側に突出した操作部において回転操作可能な軸部材と、軸部材の第2のネジ部に螺合して取付けられ、先端に切刃が形成された円筒部を備えた穿孔具とを備えている。そして第1のネジ部のピッチが前記第2のネジ部のピッチより大きくされている。これにより、作業の最初の段階である穿孔具を送る工程では送り速度を速くし、実際の穿孔工程では速度を落として小さい力での穿孔を可能とし、作業能率の向上と、穿孔作業の容易化の両方が実現できる。
【0008】
ある実施の形態では、その軸部材には、上下に貫通し、下端が穿孔具の円筒部内部に通じる貫通孔が形成され、この貫通孔に、軸方向移動可能な切片押出し棒が挿入されている。この押出し棒を使用して、穿孔具内部に取り込まれた切片を容易に取出すことができる。
【0009】
他の実施の形態では、その穿孔具が軸部材に対して下方へ移動するとき、切片押出し棒を穿孔具と一緒に同伴して移動させる同伴手段と、切片押出し棒の軸部材に対する下方への移動量を制限する移動制限手段とをさらに備えている。これにより、必要以上に穿孔具を下降させ、配管の反対側の周壁を傷付けたり、孔を明けてしまうことが防止できる。
【0010】
他の実施の形態では、その切片押出し棒が、軸部材に対して自重で下方へ移動するのを制限する落下防止手段を備えている。これにより、穿孔の進行に連れて押出し棒の上端部が次第に軸部材の上端部に接近していくことになり、作業者が穿孔完了を確実に認識でき、完了後に不必要な力を作用させ、装置を損傷する等の事故を防止できる。
【0011】
他の実施の形態では、その回転阻止部材は、スリーブ部材と本体の互いに摺接する摺接面の間に配置された弾性変形可能な弾性部材である。弾性部材の圧縮による摩擦力を利用でき、簡単な構成とすることができる。
【0012】
他の実施の形態では、その弾性部材はOリングであり、スリーブ部材と本体の前記摺接面のいずれかに形成された円周溝に収受され、他方の摺接面に押圧されている。Oリングは安価に製造でき、また溝に収受することにより、その位置決めを行なうことができる。
【0013】
他の実施の形態では、軸部材の前記第2のネジ部はオネジであり、穿孔具はその第2のオネジに螺合するメネジを備えている。これにより、軸部材内部に挿入される部材を減らし、装置の組立が容易になる。
【0014】
他の実施の形態では、その軸部材は、第1と第2のネジ部の間に径方向外方へ広がるフランジを備え、他方スリーブ部材の貫通孔には径方向に伸びる肩部が形成されている。これにより、フランジが肩部に当接して軸部材のスリーブ部材に対する上方への移動が制限され、不用意に軸部材を抜き出してしまうのを防止できる。
【0015】
さらに他の実施の形態では、軸部材のフランジ上に、軸部材とスリーブ部材の直接の接触を防止する緩衝部材が配置されている。これにより、スリーブ部材と軸部材との食付きを防止できる。
【0016】
【発明の実施の形態】
以下、図面を参照しながら本発明の実施の形態に係る穿孔装置を詳細に説明するが、以下は本発明を説明するための例示であり、本発明の範囲がこれに限定されるものではない。
【0017】
図1は本願発明の具体的は実施の形態に係る穿孔装置1を示す縦断面図であり、上側部分(A)と下側部分(B)とに分けて図示している。
【0018】
図において符号2は本体である。本体2は貫通孔3を備え、下側の径の大きい取付け部4と、その上側の径が小さくなった中間部5と、その上の、中間部5より内外径がそれぞれ小さく或いは大きくなった口部6とからなる。取付け部4の内周側には雌ネジ4aが形成され、後述するように穿孔作業をする際にこのネジ4aを用いて装置1全体が分水栓の口部に取付けられる。符号7は分水栓に取付けられたときにシールするためのジョイントシールである。そして口部6には図示のように本体キャップ11がねじ結合で固定されている。キャップ11の頂壁12には、本体2の貫通孔2と同心で、口部6の内径とほぼ同径の孔13が明いている。
【0019】
符号15は貫通孔15aが形成された筒部材である。筒部材15は下側寄りに形成された径方向外側へ広がるフランジ16により上側筒部17と下側筒部18に分けられる。図示の通り、フランジ16が本体2の口部6の上側に載置した状態でキャップ11内に位置し、筒部材15は上下方向位置決めされて抜け止めされている。上側筒部17はキャップ11の孔13を通って上側に突出しており、下側筒部18は本体2の口部6に嵌っている。
【0020】
フランジ16の上下には、筒部材15の本体2に対する回転をスムーズに行なわせる目的でニードルベアリング19が配置されているが、この回転には実際には抵抗がかかるようになっている。即ち、筒部材15の下側筒部18の外周に円周方向に延びる溝18aが形成され、この溝18a内にOリング20が配置され、本体2の口部6の内周面6aとの間で少し圧縮されている。従って、それにより生じる摩擦力が筒部材15の本体2に対する回転に対する抵抗となり、その摩擦力に打ち勝つ力が筒部材15に作用したときに筒部材は回転することとなる。
【0021】
符号23は送りねじスリーブで、その外周に形成されたオネジ25が上側筒部17の上端側に形成されたメネジ17aに螺合し、フランジ24が上側筒部17の上端に当接した状態で一体に回るように固定されている。送りねじスリーブ23の内周にはメネジ26がほぼ全長に渡って形成されている。
【0022】
符号31はリードシャフトで、内部に貫通孔32が形成され、軸方向下側寄りの位置に形成されたフランジ33より上側にはピッチの大きい第1のオネジ34が、下側には第1のオネジよりピッチの小さい第2のオネジ35が形成されている。そして第1のオネジ34が前述の送りねじスリーブ23のメネジ26に螺合してそれの上側へ伸びており、第2のオネジ35の部分は送りねじスリーブ23の下方へ伸びている。図示の状態は、リードシャフト31が本体2或いは送りねじスリーブ23に対して一番上へ移動した状態を示しており、フランジ33がその上に配置された例えばジュラコンなどの樹脂製のシャフトストッパ38を介して送りねじスリーブ23の下端すなわち肩部に当接している。ストッパ38は、金属であるリードシャフト31と送りねじスリーブ23との直接の噛み付きを避けるために配置されている。また、リードシャフト31の上端部の、第1のオネジの上側の部分はハンドル取付け部36で、ここに図示しないハンドルを取付けるようになっている。
【0023】
符号41は錐ホルダである。錐ホルダ41は貫通孔42を備え、上端部から下側所定の位置までメネジ43が形成され、このメネジ43がリードシャフト31の第2のオネジ35に螺合して、リードシャフト31に対して相対回転可能に取り付けられている。なお、メネジをリードシャフト31に、オネジを錐ホルダ41に設ける構成も可能である。外周側には軸方向所定の位置にフランジ44が形成されている。貫通孔42は錐ホルダ41の下端部近くで少し径が大きくされ、肩部45が画成されている。これに付いては後述する。
【0024】
符号51は錐であり、上側のネジ孔53が形成された基部52と、その基部52の下側に形成された薄肉の筒状になったカッター部54とを備えている。カッター部54の下端部に円環状に切刃55が形成されている。錐51は、図示の通りネジ孔53に錐ホルダ41のフランジ44より下側の部分に形成されたオネジ46が螺合し、錐51の上端面が錐ホルダ41のフランジ44の下面に突き当たった状態で、止めねじ57を用いて錐ホルダ41により回り止め及び緩み止めをされて取付けられている。
【0025】
符号61は、リードシャフト31の貫通孔32に挿入されたストリッパであり、その上端にはキャップ62が取付けられて、ストリッパ61のリードシャフト31に対する下方への移動をここで制限する。他方、その下端部にはおねじが形成され、ナット63が取付けられている。このナット63が前述の錐ホルダ41の貫通孔42の下端部に形成された肩部45に当たって、上方への移動を制限している。また、ストリッパ61の外周上に形成された円周溝にOリング64が取り付けられてリードシャフト31の貫通孔32の内壁に接触しており、その摩擦によって、図示の状態でストリッパ61が自重により下方へ落下するのを防止している。
【0026】
なおストリッパ61は、その下端部近くにおいて径方向反対側で平面状にカットされたカット面61aを備えている。一方錐ホルダ41の貫通孔42には、肩部45とリードシャフト31の下端との間で、カット面61aに対面する形で間隔の狭まった対向面32aが形成され、対向面32aの間にストリッパ61のカット面61aの部分が嵌り、ストリッパ61は錐ホルダ41と一緒に回転するようになっている。
【0027】
図1はリードシャフト31が送りねじスリーブ23に対してその最上位置にあり、ストリッパ61も一番上に引き上げられた状態である。この状態で穿孔装置1は図2に示すように、配管71に取り付けられた分水栓、この例では公知のサドル型分水栓72に取付けられる。図2においては穿孔装置1は右側半分を断面で図示してある。分水栓72の内部には、ボール73に形成された流路74を含んだ垂直方向に伸びる、その下端が配管71の外周面に臨んでいる通路75が形成されており、この通路75内を前述の錐51が上下する。
【0028】
図2は穿孔装置1を取付けた穿孔作業開始前の状態であり、錐51は装置1の本体2内に位置し、配管71からは離れた位置にある。この状態でハンドル76を回してリードシャフト31を一方向へ回転させる。この状態では錐51に何等抵抗となる力が作用していない。一方前述した通り筒部材15にはOリング20が接触していてその回転を阻止するように作用している。従ってリードシャフト31が回転しても送りねじスリーブ23とそれが固定されている筒部材15は回転しないで、リードシャフト31は送りねじスリーブ23に対して回転し、軸方向下方へ移動する。一方錐51には抵抗となる力が作用していないので、リードシャフト31と錐ホルダ41との間には相対回転は起こらず、錐51はリードシャフト31と一体的に回転し、下降する。この場合、前述した通り第1のオネジ34のピッチは大きいので、リードシャフト31の移動速度は速い。
【0029】
図3は、上述の如くリードシャフト31が下降して、錐51の先端が配管71の外周面に食込んだ状態を示している。この状態でさらにリードシャフト31を回転させて下降させようとすると、錐51は配管71からの反力を受ける。即ち、その回転は止められ、上向きの抵抗力を受ける。すると、その抵抗力によりリードシャフト31と送りネジスリーブ23とが螺合している部分での摩擦が大きくなり、その力が、Oリング20による摩擦力を上回り、リードシャフト31は送りねじスリーブ23と筒部材15とを一緒に本体2に対して回転させることとなる。従ってリードシャフト31は回転してもこれ以上下方への移動はしなくなる。一方、錐51が配管71に食込んで回転に対して抵抗を受け、リードシャフト31が下降せずにその位置で回転するので、錐ホルダ41と錐51は回転せずに下方へ移動し、錐51は配管71を押し切って行く。すなわちこの時リードシャフト17と錐ホルダ41との間に相対回転が生じているが、前述した通り第2のオネジのピッチは第1のオネジのそれより小さいので、錐51の下降速度は前より遅くなり、小さい力で配管71への穿孔を行なうことができる。
【0030】
なお、リードシャフト17が下降せず錐ホルダ41が下降するので、ナット63を介してストリッパ61が錐ホルダ41により押されて、同じ距離だけ下降させられる。
【0031】
図4は穿孔が完了した状態を示しており、錐ホルダ41に押されて下降したストリッパ61の上端のキャップ62がリードシャフト17の上端に当接し、従って錐51はこれ以上下降できない。これにより作業者は穿孔が終わったことが判る。なお、図1に示す状態でのキャップ62とリードシャフト17の上端との距離を、穿孔する配管の口径を考慮して決めておくことにより、実際に錐51が配管71の該表面に食込んでからの最大下降量が決まってしまうので、錐51が必要以上に下降して、配管71の径方向反対側を傷付けたり或いは孔を明けてしまうことを防止できる。
【0032】
穿孔が終了するとリードシャフト17を先と反対側へ回転させる。この場合、錐51が配管71に穿孔した孔から抜けきるまでは錐51に抵抗力が作用しており、リードシャフト17と錐ホルダー41との間に相対回転が生じ、リードシャフト17は上昇せず、錐51は回転せずに引き上げられ、図3の状態に至る。すると今度はリードシャフト17と送りねじスリーブ23との間に相対回転が生じ、リードシャフト17が上昇し、図2の状態に復帰する。この状態で装置1を取り外し、ストリッパ61によって錐51内へ取り込まれた配管71の切片を取外せばよい。なお、図3の状態に復帰する少し手前で、錐51に作用する抵抗力が弱くなり、その時点でリードシャフト17と送りねじスリーブ23との間の相対回転が始まり、結果的に錐ホルダ41がリードシャフト17に対して軸方向所定の位置まで復帰しない場合がある。この場合には、前述したようにストリッパ61が錐ホルダ41と一体に回転できるので、キャップ62をもってストリッパ61を回転させ、これにより錐ホルダ41をリードシャフト17に対して回転させ、所定の初期位置へ戻すことができる。
【0033】
【発明の効果】
上記説明から明らかなとおり、
【図面の簡単な説明】
【図1】本発明の実施の形態に係る管穿孔装置の縦断面図である。
【図2】管穿孔装置を分水栓に取付けた、作業開始前の状態を示す図である。
【図3】作業前段の早送りが終了した状態を示す図である。
【図4】作業後段の穿孔作業が終了した状態を示す図である。
【符号の説明】
1 管穿孔装置
2 本体
3 貫通孔
15 筒部材
15a 貫通孔
16 フランジ
20 Oリング
23 送りねじスリーブ
26 メネジ
31 リードシャフト
32 貫通孔
33 フランジ
34 第1のオネジ
35 第2のオネジ
38 シャフトストッパ
41 錐ホルダ
42 貫通孔
43 メネジ
45 肩部
51 錐
53 貫通孔
54 カッター部
55 切刃
61 ストリッパ
62 キャップ
63 ナット
71 配管
72 分水栓
75 通路
76 ハンドル
[0001]
[Industrial application fields]
The present invention relates to a perforating apparatus for perforating a branching hole in a pipe for water or gas. Specifically, the perforating apparatus is attached to a branching stopper attached to a pipe for branching, for example, a water faucet. The present invention relates to a drilling device for passing a drilling tool through a stopper and drilling a pipe with the drilling tool. Furthermore, the present invention relates to a tube punching device that can be suitably used for punching soft tubes such as polyethylene.
[0002]
[Prior art]
Conventionally, a branch pipe may be attached in the middle of piping such as water supply or gas. In this case, a branch plug is attached to a predetermined position of the pipe, a perforator is passed through the flow path in the branch plug, and a hole is made in the pipe at a position corresponding to the flow path.
[0003]
In the perforation apparatus disclosed in Utility Model Registration No. 2598493, a main body having an internal thread formed on the inner peripheral surface and an external thread that is screwed into the female screw are formed on the outer peripheral surface, and these screws are screwed together As a result of the rotation operation, a rotator that moves back and forth along the branch path and a piercing tool that is linked to the rotator so as to be relatively rotatable constitute a piercing device.
[0004]
[Patent Document 1]
Utility Model Registration No. 2598493 (paragraphs 0007 to 0016, FIG. 1).
[0005]
[Problems to be solved by the invention]
By the way, in the above-mentioned utility model, the rotating body always descends while rotating at a constant pitch with respect to the main body. In general, when such a perforating apparatus is set, the perforating tool is at a position away from the pipe surface, and the rotating body is first rotated to lower the perforating tool to a position where it hits the pipe, and then the actual perforating operation is performed. During this initial movement, no drilling operation is performed and the movement is merely a downward movement, so that it is desired to move at a high speed from the viewpoint of work efficiency. For that purpose, the pitch of the screw may be increased. However, if the pitch of the screw is increased, the depth of cut into the pipe of the drilling tool per rotation increases when the drilling is actually started, so that a great force is required for the drilling operation. If the screw pitch is reduced, the force required for drilling is reduced, but this time it takes time to start drilling, and the work efficiency is reduced.
[0006]
The present invention has been made in view of the above-mentioned conventional problems, and the moving speed of the drilling tool is increased in the process before the actual drilling is started, and the moving speed is further decreased during drilling to shorten the total work time. Thus, it is an object of the present invention to provide a drilling device that can increase the work efficiency and reduce the force required for drilling and perform the drilling work easily.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, a tube punching device according to the present invention is provided with a main body provided with a through hole leading to a branch passage of a branch plug inside, and attached to the main body so as to be relatively rotatable and not movable relative to the axial direction. A through hole communicating with the through hole of the main body is provided, and a sleeve member having a female screw formed in the through hole is provided. And the rotation prevention member which prevents relative rotation with respect to the main body of a sleeve member with limited strength is arrange | positioned between a main body and a sleeve member. The tube punching device further includes a first threaded portion that is screwed into the female thread of the sleeve member, and a second threaded portion that is formed below the first threaded portion, on the upper side of the sleeve member. A shaft member that can be rotated in the projecting operation portion, and a drilling tool that includes a cylindrical portion that is screwed onto the second screw portion of the shaft member and has a cutting edge formed at the tip. The pitch of the first screw portion is larger than the pitch of the second screw portion. As a result, the feeding speed is increased in the process of feeding the drilling tool, which is the first stage of the work, and the drilling speed can be reduced and the drilling can be performed with a small force in the actual drilling process, improving the work efficiency and facilitating the drilling work. Both can be realized.
[0008]
In one embodiment, the shaft member is formed with a through-hole penetrating vertically and having a lower end communicating with the inside of the cylindrical portion of the punching tool, and an axially movable section pusher rod is inserted into the through-hole. Yes. Using this push rod, the section taken inside the punch can be easily removed.
[0009]
In another embodiment, as the drilling tool moves downward relative to the shaft member, accompanying means for moving the section pusher bar together with the drilling tool, and downwardly moving the section pusher bar relative to the shaft member. Movement restriction means for restricting the movement amount is further provided. Thereby, it is possible to prevent the drilling tool from being lowered more than necessary, and to damage the peripheral wall on the opposite side of the pipe or to open a hole.
[0010]
In another embodiment, the section pushing rod is provided with a fall prevention means for restricting the section pushing rod from moving downward with its own weight with respect to the shaft member. As a result, the upper end of the push rod gradually approaches the upper end of the shaft member as the drilling progresses, so that the operator can reliably recognize the completion of the drilling and apply unnecessary force after the completion. Accidents such as damage to the device can be prevented.
[0011]
In another embodiment, the rotation preventing member is an elastically deformable elastic member that is disposed between the sliding contact surfaces of the sleeve member and the main body that are in sliding contact with each other. A frictional force generated by compression of the elastic member can be used, and a simple configuration can be obtained.
[0012]
In another embodiment, the elastic member is an O-ring that is received by a circumferential groove formed on either the sleeve member or the sliding contact surface of the main body and pressed against the other sliding contact surface. The O-ring can be manufactured at low cost and can be positioned by receiving it in the groove.
[0013]
In another embodiment, the second screw portion of the shaft member is a male screw, and the punch has a female screw that is screwed into the second male screw. This reduces the number of members inserted into the shaft member and facilitates assembly of the apparatus.
[0014]
In another embodiment, the shaft member includes a flange extending radially outward between the first and second screw portions, and a shoulder portion extending in the radial direction is formed in the through hole of the sleeve member. ing. Accordingly, the upward movement of the shaft member with respect to the sleeve member due to the contact of the flange with the shoulder portion is restricted, and the shaft member can be prevented from being inadvertently pulled out.
[0015]
In yet another embodiment, a buffer member for preventing direct contact between the shaft member and the sleeve member is disposed on the flange of the shaft member. Thereby, the biting with a sleeve member and a shaft member can be prevented.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a perforating apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. However, the following is an example for describing the present invention, and the scope of the present invention is not limited thereto. .
[0017]
FIG. 1 is a longitudinal sectional view showing a drilling device 1 according to an embodiment of the present invention, which is divided into an upper part (A) and a lower part (B).
[0018]
In the figure, reference numeral 2 denotes a main body. The main body 2 includes a through-hole 3, a lower mounting portion 4 having a large diameter, an intermediate portion 5 having a smaller upper diameter, and an inner / outer diameter that is smaller or larger than the upper intermediate portion 5. It consists of a mouth 6. A female screw 4a is formed on the inner peripheral side of the attachment portion 4, and the entire device 1 is attached to the mouth portion of the water faucet using this screw 4a when drilling as will be described later. Reference numeral 7 denotes a joint seal for sealing when attached to the water faucet. A body cap 11 is fixed to the mouth portion 6 by screw connection as shown in the figure. The top wall 12 of the cap 11 has a hole 13 concentric with the through hole 2 of the main body 2 and having the same diameter as the inner diameter of the mouth portion 6.
[0019]
Reference numeral 15 denotes a cylindrical member in which a through hole 15a is formed. The cylindrical member 15 is divided into an upper cylindrical portion 17 and a lower cylindrical portion 18 by a flange 16 that is formed on the lower side and extends radially outward. As shown in the figure, the flange 16 is positioned in the cap 11 in a state of being placed on the upper side of the mouth portion 6 of the main body 2, and the cylindrical member 15 is positioned in the vertical direction and is prevented from coming off. The upper cylindrical portion 17 protrudes upward through the hole 13 of the cap 11, and the lower cylindrical portion 18 is fitted in the mouth portion 6 of the main body 2.
[0020]
Needle bearings 19 are disposed above and below the flange 16 for the purpose of smoothly rotating the cylindrical member 15 with respect to the main body 2, but resistance is actually applied to this rotation. That is, a circumferentially extending groove 18 a is formed on the outer periphery of the lower cylindrical portion 18 of the cylindrical member 15, an O-ring 20 is disposed in the groove 18 a, and the inner peripheral surface 6 a of the mouth portion 6 of the main body 2. A little compressed between. Accordingly, the frictional force generated thereby becomes a resistance against the rotation of the cylindrical member 15 with respect to the main body 2, and the cylindrical member rotates when a force that overcomes the frictional force acts on the cylindrical member 15.
[0021]
Reference numeral 23 denotes a feed screw sleeve, in which a male screw 25 formed on the outer periphery thereof is screwed into a female screw 17 a formed on the upper end side of the upper cylindrical portion 17, and the flange 24 is in contact with the upper end of the upper cylindrical portion 17. It is fixed so as to rotate together. A female screw 26 is formed on the inner periphery of the feed screw sleeve 23 over almost the entire length.
[0022]
Reference numeral 31 denotes a lead shaft having a through hole 32 formed therein, a first male screw 34 having a large pitch above the flange 33 formed at a position closer to the lower side in the axial direction, and a first screw 34 on the lower side. A second male screw 35 having a smaller pitch than the male screw is formed. The first male screw 34 is screwed into the female screw 26 of the feed screw sleeve 23 and extends upward, and the second male screw 35 extends downward from the feed screw sleeve 23. The state shown in the drawing shows a state in which the lead shaft 31 has moved to the uppermost position with respect to the main body 2 or the feed screw sleeve 23, and a flange 33 is disposed on the resin shaft stopper 38 such as Duracon. Is in contact with the lower end of the feed screw sleeve 23, that is, the shoulder. The stopper 38 is arranged to avoid direct biting between the lead shaft 31 and the feed screw sleeve 23, which are metal. Further, the upper portion of the lead shaft 31 above the first male screw is a handle mounting portion 36, to which a handle (not shown) is mounted.
[0023]
Reference numeral 41 denotes a cone holder. The cone holder 41 includes a through hole 42, and a female screw 43 is formed from the upper end portion to a predetermined position on the lower side. The female screw 43 is screwed into the second male screw 35 of the lead shaft 31, so It is mounted so that it can be rotated relative to it. In addition, the structure which provides a female screw in the lead shaft 31 and a male screw in the cone holder 41 is also possible. A flange 44 is formed at a predetermined position in the axial direction on the outer peripheral side. The diameter of the through hole 42 is slightly increased near the lower end of the cone holder 41, and a shoulder 45 is defined. This will be described later.
[0024]
Reference numeral 51 denotes a cone, which includes a base portion 52 in which an upper screw hole 53 is formed, and a thin cylindrical cutter portion 54 formed below the base portion 52. A cutting blade 55 is formed in an annular shape at the lower end of the cutter portion 54. In the cone 51, a male screw 46 formed in a portion below the flange 44 of the cone holder 41 is screwed into the screw hole 53 as shown, and the upper end surface of the cone 51 hits the lower surface of the flange 44 of the cone holder 41. In the state, the rotation is prevented and loosened by the cone holder 41 by using a set screw 57 and attached.
[0025]
Reference numeral 61 denotes a stripper inserted into the through hole 32 of the lead shaft 31, and a cap 62 is attached to the upper end of the stripper 61 to restrict the downward movement of the stripper 61 relative to the lead shaft 31. On the other hand, a male screw is formed at the lower end portion, and a nut 63 is attached. The nut 63 hits the shoulder 45 formed at the lower end of the through hole 42 of the cone holder 41 described above, and restricts upward movement. Further, an O-ring 64 is attached to a circumferential groove formed on the outer periphery of the stripper 61 and is in contact with the inner wall of the through hole 32 of the lead shaft 31. Due to the friction, the stripper 61 is caused by its own weight in the illustrated state. Prevents falling down.
[0026]
The stripper 61 includes a cut surface 61a that is cut in a planar shape on the opposite side in the radial direction near its lower end. On the other hand, in the through hole 42 of the cone holder 41, an opposing surface 32a is formed between the shoulder portion 45 and the lower end of the lead shaft 31, and is opposed to the cut surface 61a. A portion of the cut surface 61 a of the stripper 61 is fitted, and the stripper 61 rotates together with the cone holder 41.
[0027]
In FIG. 1, the lead shaft 31 is at its uppermost position with respect to the feed screw sleeve 23, and the stripper 61 is also pulled up to the uppermost position. In this state, as shown in FIG. 2, the perforating apparatus 1 is attached to a water faucet attached to a pipe 71, in this example, a known saddle type water faucet 72. In FIG. 2, the right side half of the perforating apparatus 1 is shown in cross section. Inside the water faucet 72, a passage 75 extending in the vertical direction including the flow path 74 formed in the ball 73 and having a lower end facing the outer peripheral surface of the pipe 71 is formed. The above-mentioned cone 51 moves up and down.
[0028]
FIG. 2 shows a state before the drilling operation is started with the drilling device 1 attached, and the cone 51 is located in the main body 2 of the device 1 and is away from the pipe 71. In this state, the handle 76 is rotated to rotate the lead shaft 31 in one direction. In this state, no resistance force acts on the cone 51. On the other hand, as described above, the O-ring 20 is in contact with the cylindrical member 15 and acts to prevent its rotation. Therefore, even if the lead shaft 31 rotates, the feed screw sleeve 23 and the cylindrical member 15 to which it is fixed do not rotate, and the lead shaft 31 rotates relative to the feed screw sleeve 23 and moves downward in the axial direction. On the other hand, since no resistance force acts on the cone 51, relative rotation does not occur between the lead shaft 31 and the cone holder 41, and the cone 51 rotates integrally with the lead shaft 31 and descends. In this case, since the pitch of the first male screw 34 is large as described above, the moving speed of the lead shaft 31 is fast.
[0029]
FIG. 3 shows a state in which the lead shaft 31 is lowered as described above and the tip of the cone 51 is biting into the outer peripheral surface of the pipe 71. If the lead shaft 31 is further rotated and lowered in this state, the cone 51 receives a reaction force from the pipe 71. That is, the rotation is stopped and an upward resistance force is received. Then, due to the resistance force, the friction at the portion where the lead shaft 31 and the feed screw sleeve 23 are screwed is increased, and the force exceeds the friction force by the O-ring 20, and the lead shaft 31 is fed to the feed screw sleeve 23. And the cylindrical member 15 are rotated together with the main body 2. Therefore, even if the lead shaft 31 rotates, the lead shaft 31 does not move any further downward. On the other hand, the cone 51 bites into the pipe 71 and receives resistance to rotation, and the lead shaft 31 does not descend and rotates at that position, so the cone holder 41 and the cone 51 move downward without rotating, The cone 51 pushes through the pipe 71. That is, at this time, relative rotation occurs between the lead shaft 17 and the cone holder 41. As described above, the pitch of the second male screw is smaller than that of the first male screw, so that the descending speed of the cone 51 is higher than before. The pipe 71 is drilled with a small force.
[0030]
Since the lead shaft 17 does not descend and the cone holder 41 descends, the stripper 61 is pushed by the cone holder 41 via the nut 63 and lowered by the same distance.
[0031]
FIG. 4 shows a state in which drilling has been completed, and the cap 62 at the upper end of the stripper 61 lowered by being pushed by the cone holder 41 comes into contact with the upper end of the lead shaft 17, so that the cone 51 cannot be lowered any further. As a result, the operator knows that the drilling is finished. In addition, the cone 51 actually bites into the surface of the pipe 71 by determining the distance between the cap 62 and the upper end of the lead shaft 17 in the state shown in FIG. Therefore, it is possible to prevent the cone 51 from being lowered more than necessary and damaging the opposite side of the pipe 71 in the radial direction or making a hole.
[0032]
When the drilling is completed, the lead shaft 17 is rotated to the opposite side. In this case, until the cone 51 is completely removed from the hole drilled in the pipe 71, a resistance force acts on the cone 51, relative rotation occurs between the lead shaft 17 and the cone holder 41, and the lead shaft 17 is raised. First, the cone 51 is pulled up without rotating, and the state shown in FIG. 3 is reached. Then, this time, relative rotation occurs between the lead shaft 17 and the feed screw sleeve 23, and the lead shaft 17 rises and returns to the state shown in FIG. In this state, the apparatus 1 is removed, and the section of the pipe 71 taken into the cone 51 by the stripper 61 may be removed. A little before returning to the state of FIG. 3, the resistance force acting on the cone 51 becomes weak, and at that time, the relative rotation between the lead shaft 17 and the feed screw sleeve 23 starts, and as a result, the cone holder 41. May not return to a predetermined position in the axial direction with respect to the lead shaft 17. In this case, since the stripper 61 can rotate integrally with the cone holder 41 as described above, the stripper 61 is rotated by the cap 62, thereby rotating the cone holder 41 with respect to the lead shaft 17, and a predetermined initial position. You can return to
[0033]
【The invention's effect】
As is clear from the above explanation,
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a tube punching device according to an embodiment of the present invention.
FIG. 2 is a view showing a state before starting work, in which a pipe punching device is attached to a water faucet.
FIG. 3 is a diagram illustrating a state in which fast-forwarding in the first stage of work is completed.
FIG. 4 is a diagram illustrating a state in which a post-work drilling operation has been completed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe punching apparatus 2 Main body 3 Through-hole 15 Cylindrical member 15a Through-hole 16 Flange 20 O-ring 23 Feed screw sleeve 26 Female screw 31 Lead shaft 32 Through-hole 33 Flange 34 First male screw 35 Second male screw 38 Shaft stopper 41 Conical holder 42 Through-hole 43 Female thread 45 Shoulder 51 Cone 53 Through-hole 54 Cutter part 55 Cutting blade 61 Stripper 62 Cap 63 Nut 71 Pipe 72 Water faucet 75 Passage 76 Handle

Claims (9)

配管の外周面に取付けられた分岐栓に固定して、前記配管に、前記分岐栓に形成された分岐路に通じる孔を穿孔する管穿孔装置において、内部に前記分岐栓の分岐路に通じる貫通孔を備えた本体と、該本体に相対回転可能で相対軸方向移動不能に取付けられ、前記本体の貫通孔に通じる貫通孔を備え、該貫通孔にメネジが形成されたスリーブ部材と、前記本体と前記スリーブ部材との間に配置され、限定された強さで前記スリーブ部材の前記本体に対する相対回転を阻止する回転阻止部材と、前記スリーブ部材の前記メネジに螺合する第1のネジ部と、前記第1のネジ部の下側に形成された第2のネジ部とを備え、前記スリーブ部材の上側に突出した操作部において回転操作可能な軸部材と、前記軸部材の前記第2のネジ部に螺合して取付けられ、先端に切刃が形成された円筒部を備えた穿孔具とを備え、前記第1のネジ部のピッチが前記第2のネジ部のピッチより大きいことを特徴とする、管穿孔装置。In a pipe punching device, which is fixed to a branch plug attached to the outer peripheral surface of a pipe and drills a hole in the pipe leading to a branch path formed in the branch plug, a through-hole leading to the branch path of the branch plug inside A main body having a hole, a sleeve member attached to the main body so as to be rotatable relative to the main body so as not to move in a relative axial direction, and having a through hole communicating with the through hole of the main body, and having a female screw formed in the through hole; A rotation prevention member disposed between the sleeve member and the sleeve member, the rotation prevention member preventing the relative rotation of the sleeve member with respect to the main body with a limited strength, and a first screw portion screwed into the female screw of the sleeve member. A shaft member that can be rotated in an operation portion that protrudes above the sleeve member, and a second screw portion formed on the lower side of the first screw portion, and the second screw portion of the shaft member. Screwed onto the screw It is, and a piercer having a cylindrical portion which the cutting edge is formed at the distal end, wherein a pitch of the first threaded portion is larger than the pitch of the second threaded portion, the tube punching device. 請求項1記載の管穿孔装置において、前記軸部材には、上下に貫通し、下端が前記穿孔具の前記円筒部内部に通じる貫通孔が形成され、前記貫通孔に、軸方向移動可能な切片押出し棒が挿入されていることを特徴とする、管穿孔装置。2. The tube perforating apparatus according to claim 1, wherein the shaft member is formed with a through-hole penetrating vertically and having a lower end communicating with the inside of the cylindrical portion of the drilling tool, and the axially movable section is formed in the through-hole. A tube punching device, wherein an extrusion rod is inserted. 請求項2記載の管穿孔装置において、前記穿孔具が前記軸部材に対して下方へ移動するとき、前記切片押出し棒を前記穿孔具と一緒に同伴して移動させる同伴手段と、前記切片押出し棒の前記軸部材に対する下方への移動量を制限する移動制限手段とを備えていることを特徴とする、管穿孔装置。3. The tube punching device according to claim 2, wherein when the punching tool moves downward with respect to the shaft member, accompanying means for moving the slice pushing rod together with the punching tool, and the slice pushing rod. And a movement restricting means for restricting a downward movement amount relative to the shaft member. 請求項3記載の管穿孔装置において、前記切片押出し棒が、前記軸部材に対して自重で下方へ移動するのを制限する落下防止手段を備えていることを特徴とする、管穿孔装置。4. The tube punching device according to claim 3, further comprising a fall prevention means for restricting the section pushing rod from moving downward with its own weight relative to the shaft member. 請求項1記載の管穿孔装置において、前記回転阻止部材は、前記スリーブ部材と前記本体の互いに摺接する摺接面の間に配置された弾性変形可能な弾性部材であることを特徴とする、管穿孔装置。2. The tube punching device according to claim 1, wherein the rotation preventing member is an elastically deformable elastic member disposed between sliding surfaces of the sleeve member and the main body that are in sliding contact with each other. Drilling device. 請求項5記載の管穿孔装置において、前記弾性部材はOリングであり、前記スリーブ部材と前記本体の前記摺接面のいずれかに形成された円周溝に収受され、他方の摺接面に押圧されていることを特徴とする、管穿孔装置。6. The tube punching device according to claim 5, wherein the elastic member is an O-ring, received by a circumferential groove formed in one of the sleeve member and the sliding contact surface of the main body, and on the other sliding contact surface. A tube punching device characterized by being pressed. 請求項1記載の管穿孔装置において、前記軸部材の前記第2のネジ部はオネジであり、前記穿孔具は前記第2のオネジに螺合するメネジを備えていることを特徴とする、管穿孔装置。2. The tube punching device according to claim 1, wherein the second screw portion of the shaft member is a male screw, and the punching tool includes a female screw that is screwed into the second male screw. Drilling device. 請求項1記載の管穿孔装置において、前記軸部材は、前記第1と第2のネジ部の間に径方向外方へ広がるフランジを備え、前記スリーブ部材の前記貫通孔には径方向に伸びる肩部が形成され、前記フランジが前記肩部に当接することにより、前記軸部材の前記スリーブ部材に対する上方への移動が制限されることを特徴とする、管穿孔装置。2. The tube perforating apparatus according to claim 1, wherein the shaft member includes a flange extending radially outward between the first and second screw portions, and extends radially in the through-hole of the sleeve member. A tube punching device, wherein a shoulder portion is formed, and the upward movement of the shaft member relative to the sleeve member is restricted by the flange being in contact with the shoulder portion. 請求項8記載の管穿孔装置において、前記フランジ上に、前記軸部材と前記スリーブ部材の直接の接触を防止する緩衝部材が配置されていることを特徴とする、管穿孔装置。9. The tube punching device according to claim 8, wherein a buffer member that prevents direct contact between the shaft member and the sleeve member is disposed on the flange.
JP2003173510A 2003-06-18 2003-06-18 Pipe punching device Expired - Lifetime JP4200057B2 (en)

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