JP6739104B2 - Ultrasonic vibration welding method for flexible tube and resin molded product, and ultrasonic vibration welding apparatus - Google Patents

Ultrasonic vibration welding method for flexible tube and resin molded product, and ultrasonic vibration welding apparatus Download PDF

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JP6739104B2
JP6739104B2 JP2017080484A JP2017080484A JP6739104B2 JP 6739104 B2 JP6739104 B2 JP 6739104B2 JP 2017080484 A JP2017080484 A JP 2017080484A JP 2017080484 A JP2017080484 A JP 2017080484A JP 6739104 B2 JP6739104 B2 JP 6739104B2
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tube
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善文 小野塚
善文 小野塚
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Seidensha Electronics Co Ltd
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本発明は、可撓性チューブと樹脂成形品の超音波振動溶着方法、および超音波振動溶着装置に関し、特に点滴用のチューブやカテーテル用チューブ等の可撓性チューブを樹脂成形品に溶着する超音波振動溶着方法、および超音波振動溶着装置に関する。 The present invention relates to an ultrasonic vibration welding method for a flexible tube and a resin molded product, and an ultrasonic vibration welding device, and particularly to a method for welding a flexible tube such as a drip tube or a catheter tube to a resin molded product. The present invention relates to a sonic vibration welding method and an ultrasonic vibration welding device.

従来から、医療器具として、点滴筒などの樹脂成形品に可撓性チューブが直接一体に接続されたものが用いられている。図１７は、点滴筒１０Ａに可撓性チューブ２０を接続した医療器具の全体図であり、図１８は、点滴筒１０Ａと可撓性チューブ（以下、略して「チューブ」と記載する）２０の接続部分の拡大図である（例えば、特許文献１参照）。 2. Description of the Related Art Conventionally, as a medical device, a flexible tube directly connected to a resin molded product such as a drip tube has been used. FIG. 17 is an overall view of a medical device in which a flexible tube 20 is connected to the drip tube 10A, and FIG. 18 shows a drip tube 10A and a flexible tube (hereinafter, abbreviated as “tube”) 20. It is an enlarged view of a connection part (for example, refer to patent document 1).

点滴筒１０Ａとチューブ２０の接続部分は、図１８に示したように、点滴筒１０Ａの下端には、外管１１と内管１２が突出していて、外管１１と内管１２の間には、チューブ２０を挿入するための挿入用空間１３が形成されている。チューブ２０は挿入用空間１３に挿入され固定されるが、チューブ２０に外力がかかっても抜けないように離脱防止策がとられている。 As shown in FIG. 18, the connecting portion between the drip barrel 10A and the tube 20 has an outer pipe 11 and an inner pipe 12 projecting from the lower end of the drip barrel 10A, and between the outer pipe 11 and the inner pipe 12. An insertion space 13 for inserting the tube 20 is formed. The tube 20 is inserted and fixed in the insertion space 13, but a detachment prevention measure is taken so that the tube 20 does not come off even if an external force is applied to the tube 20.

従来技術として、チューブを点滴筒などの樹脂成形品に一体に接続するのに超音波振動溶着装置を利用したものとして、図１９、２０に示したものが知られている（例えば、特許文献２参照）。
図１９は、チューブ２０と点滴筒１０Ａを接続する直前の要部断面図を示している。図２０は、チューブ２０と点滴筒１０Ａを接続したときの部分拡大図を示している。なお図１９、２０に示したように、接続作業は、作業の便宜上、点滴筒１０Ａの上下関係を前記の図１７、１８と逆にして行われる。図１９、２０では、内管１２がチューブ２０の端部内に挿入されると共に、チューブ２０の端部が挿入用空間１３に挿入されている。 As a conventional technique, a device shown in FIGS. 19 and 20 is known as a device that uses an ultrasonic vibration welding device to integrally connect a tube to a resin molded product such as a drip tube (for example, Patent Document 2). reference).
FIG. 19 shows a cross-sectional view of a main part immediately before connecting the tube 20 and the drip tube 10A. FIG. 20 shows a partially enlarged view of the tube 20 and the drip tube 10A connected to each other. Note that, as shown in FIGS. 19 and 20, the connection work is performed by reversing the vertical relationship of the drip tube 10A from that in FIGS. 19 and 20, the inner tube 12 is inserted into the end portion of the tube 20, and the end portion of the tube 20 is inserted into the insertion space 13.

上記従来の装置では、外管１１に、径方向外方への変形を抑制するリング状ガイド体４を外嵌すると共に、外管１１とチューブ２０の間に、工具ホーン３先端の当接部３ａを当て、工具ホーン３を軸方向（内管１２の軸方向）に数十μｍの振幅で、１５〜４０ｋＨｚの超音波振動をさせる。そして、工具ホーン３先端の当接部３ａが当たっている外管１１の内周部のみを溶融させ、チューブ２０に対し径方向に圧接状に固化させることで、外管１１の内周部に、チューブ２０を内管１２に押圧する離脱防止部１５ａを形成する。そして、チューブ２０と点滴筒１０Ａが離れないように接続している。 In the above-mentioned conventional device, the ring-shaped guide body 4 that suppresses the outward deformation in the radial direction is externally fitted to the outer tube 11, and the contact portion at the tip of the tool horn 3 is provided between the outer tube 11 and the tube 20. 3a is applied, and the tool horn 3 is subjected to ultrasonic vibration of 15 to 40 kHz with an amplitude of several tens of μm in the axial direction (axial direction of the inner tube 12). Then, only the inner peripheral portion of the outer pipe 11 against which the contact portion 3a at the tip of the tool horn 3 abuts is melted and solidified in a pressure contact shape in the radial direction with respect to the tube 20, so that the inner peripheral portion of the outer pipe 11 is The separation preventing portion 15a for pressing the tube 20 against the inner tube 12 is formed. The tube 20 and the drip tube 10A are connected so as not to separate from each other.

繰り返しの説明になるが、図１９、２０に示されるように、外管１１にリング状ガイド体４を外嵌して、外管１１の内壁に形成した段差部１４に超音波振動している工具ホーン３が押し当てられると、外管１１の径方向外方への変形が抑制された状態で段差部１４の一部が溶融してチューブ２０に圧接状に固化する。そして、チューブ２０を内管１２に押圧する離脱防止部１５ａが形成され、チューブ２０は点滴筒１０Ａに接続される。外管１１にリング状ガイド体４を嵌めたことで、離脱防止部１５ａは、チューブ２０を圧接して固まる。図１７、１８の状態で、チューブ２０に外力がかかってもチューブ２０は点滴筒１０Ａから抜けない、とされている。 As will be described repeatedly, as shown in FIGS. 19 and 20, the ring-shaped guide body 4 is externally fitted to the outer tube 11 and ultrasonically vibrates in the step portion 14 formed on the inner wall of the outer tube 11. When the tool horn 3 is pressed, a part of the step portion 14 is melted and solidified in pressure contact with the tube 20 in a state where the outer tube 11 is restrained from being deformed radially outward. Then, a separation preventing portion 15a for pressing the tube 20 against the inner tube 12 is formed, and the tube 20 is connected to the drip tube 10A. By fitting the ring-shaped guide body 4 in the outer tube 11, the detachment preventing portion 15a is pressed against the tube 20 to be solidified. In the state of FIGS. 17 and 18, even if an external force is applied to the tube 20, the tube 20 is said not to come off from the drip tube 10A.

しかし、この方法にも課題がある。上記従来の溶着方法および装置では、外管１１の内周部のみを溶融させるために図２１Ａ、図２１Ｂのように、工具ホーン３の中心から外部へチューブを通す孔３８（又は嵌脱用開口部３９）を設けておき、この孔３８（又は嵌脱用開口部３９）にチューブ２０を矢印で示したように通す（嵌める）作業と外す（脱す）作業が必要である。接続作業の都度、一つの作業ごとに、工具ホーン３の孔３８（又は嵌脱用開口部３９）にチューブ２０を通す（嵌める）作業と外す（脱す）作業に時間がかかるのが一つ目の課題である。 However, this method also has problems. In the conventional welding method and apparatus described above, in order to melt only the inner peripheral portion of the outer tube 11, as shown in FIGS. 21A and 21B, the hole 38 (or the fitting/removal opening) for passing the tube from the center of the tool horn 3 to the outside is performed. It is necessary to provide (portion 39) and pass (fit) and remove (remove) the tube 20 through the hole 38 (or the fitting opening 39) as shown by the arrow. Each time the connecting work is performed, it takes time to pass (fit) and remove (remove) the tube 20 from the hole 38 (or the fitting opening 39) of the tool horn 3 for each work. Is the subject of.

上記従来の接続方法の作業手順を図２２にフローチャートで示した。図２２の作業手順を順に説明すると、まず、外管１１の外周をリング状ガイド体４で囲む（ステップＳ１１）。次に、チューブ２０を、挿入用空間１３に入れる（ステップＳ１２）。チューブ２０を工具ホーン３の孔に通す（ステップＳ１３）。工具ホーン３を超音波振動し、工具ホーンの先端３ａで外管１１の内周部を溶かす（ステップＳ１４）。外管１１の径方向外方への変形を抑制した状態で、離脱防止部１５ａを形成する（ステップＳ１５）。工具ホーン３を元の位置に戻し（ステップＳ１６）、チューブ２０を工具ホーン３の孔から外す（ステップＳ１７）。リング状ガイド体４を離す（ステップＳ１８）。そして、点滴筒１０Ａとチューブ２０の接続作業が完了する（ステップＳ１９）。 The work procedure of the conventional connection method is shown in the flow chart of FIG. The work procedure of FIG. 22 will be described in order. First, the outer circumference of the outer tube 11 is surrounded by the ring-shaped guide body 4 (step S11). Next, the tube 20 is put into the insertion space 13 (step S12). The tube 20 is passed through the hole of the tool horn 3 (step S13). The tool horn 3 is ultrasonically vibrated to melt the inner peripheral portion of the outer tube 11 at the tip 3a of the tool horn (step S14). The detachment prevention portion 15a is formed in a state where the outer pipe 11 is restrained from being deformed radially outward (step S15). The tool horn 3 is returned to the original position (step S16), and the tube 20 is removed from the hole of the tool horn 3 (step S17). The ring-shaped guide body 4 is released (step S18). Then, the work of connecting the drip cylinder 10A and the tube 20 is completed (step S19).

図２２の接続作業のフローチャートから、工具ホーンの中心の孔にチューブ２０を通す作業（ステップＳ１３）と外す作業（ステップＳ１７）が無くなれば、生産性は飛躍的に向上する。
二つ目の課題は、上記従来の方法は、外管１１の離脱防止部１５ａでチューブ２０を押圧する離脱防止策であり、超音波振動溶着装置を利用しているのに外管１１の内周部とチューブ（可撓性チューブ）２０を溶着していないことである。外管１１の内周部とチューブ２０を溶着すれば離脱防止力は飛躍的に向上する。 From the flowchart of the connection work of FIG. 22, if the work of passing the tube 20 through the hole at the center of the tool horn (step S13) and the work of removing it (step S17) are eliminated, the productivity is dramatically improved.
The second problem is that the above-described conventional method is a detachment prevention measure in which the detachment prevention portion 15a of the outer pipe 11 presses the tube 20, and the ultrasonic vibration welding device is used, but That is, the peripheral portion and the tube (flexible tube) 20 are not welded. If the inner peripheral portion of the outer tube 11 and the tube 20 are welded together, the separation prevention force is dramatically improved.

なお、医療器具のチューブの中には、図２３Ａ、図２３Ｂに断面図を示したように、外周面に段差のあるチューブとして、チューブの外形を軸方向に沿って波を打たせた形のチューブ、例えば、カテーテル用のチューブがある。
なお、図２３Ａ、図２３Ｂでは、図２３Ａの外周面に段差のあるチューブ２２に軸方向の圧縮力Ｆ１を加えると、図２３Ｂのように軸方向の長さ（Ｌ０）が縮んで長さ（Ｌ１）となり、段差のピッチ（Ｐ０）も縮んでピッチ（Ｐ１）となるが、外径（Ｄ０）は拡大して外径（Ｄ１）となることを示している。（詳しくは、特許文献３参照）。 As shown in the cross-sectional views of FIGS. 23A and 23B, the tube of the medical device is a tube having a step on the outer peripheral surface, and the outer shape of the tube is undulated along the axial direction. There are tubes, for example tubes for catheters.
23A and 23B, when a compressive force F 1 in the axial direction is applied to the tube 22 having a step on the outer peripheral surface of FIG. 23A, the axial length (L 0 ) is shortened as shown in FIG. 23B. (L 1 ), the pitch of the step (P 0 ) is also reduced to the pitch (P 1 ), but the outer diameter (D 0 ) is expanded to the outer diameter (D 1 ). (For details, refer to Patent Document 3).

三つ目の課題は、これら外周面に段差のあるチューブで、段差の山がつるまき状につながっているものは、図１９、２０で説明した従来の方法では、チューブ２２と樹脂成形品１０Ａの当接部が全周にわたって完全密着するように接続できないことである。
また、チューブを接続する従来の樹脂成形品として、軸継手１０Ｃを用いることもあるが、上記課題があることは同じである。参考のため、軸継手１０Ｃの例を図２４に示した。 The third problem is that the tubes having steps on the outer peripheral surface thereof, in which the peaks of the steps are connected in a spiral shape, are different from the tube 22 and the resin molded product 10A in the conventional method described with reference to FIGS. That is, the contact part cannot be connected so as to be in complete contact over the entire circumference.
Further, the shaft coupling 10C may be used as a conventional resin molded product for connecting a tube, but the same problem exists. For reference, an example of the shaft coupling 10C is shown in FIG.

図２４の軸継手１０Ｃでは、上下に内管１２Ａ、１２Ｂを突出させ、上の内管１２Ａの外に外管底壁１１ｃでつないだ外管１１を設け、外管１１と内管１２Ａの間にチューブの挿入用空間１３を形成している。なお、図２４の外管１１の外管内壁１１ａには、図１９にあった段差部１４を形成していない場合を示した。下方に突出している内管１２Ｂの表面には、抜け止め溝１２ｃを形成している。 In the shaft coupling 10C of FIG. 24, the inner pipes 12A and 12B are projected vertically, and the outer pipe 11 connected to the outer pipe bottom wall 11c is provided outside the upper inner pipe 12A, and between the outer pipe 11 and the inner pipe 12A. A space 13 for inserting the tube is formed therein. In addition, the case where the step portion 14 shown in FIG. 19 is not formed on the outer pipe inner wall 11a of the outer pipe 11 of FIG. 24 is shown. A retaining groove 12c is formed on the surface of the inner tube 12B protruding downward.

軸継手１０Ｃの例では、図２５のように、チューブ２０Ａを内管１２Ａに被せ、図示しないリング状ガイド体を外嵌して、外管１１の径方向外方への変形を抑制した状態で、同じく図示しない工具ホーンで外管１１の内周部のみを溶融させ、離脱防止部１５ｂを形成して接続している。そして、て、チューブ２０Ｂを下方から内管１２Ｂに押し込んで接続している。 In the example of the shaft coupling 10C, as shown in FIG. 25, the tube 20A is covered on the inner tube 12A, and a ring-shaped guide body (not shown) is externally fitted to the outer tube 11 in a state in which the outward deformation of the outer tube 11 is suppressed. Similarly, only the inner peripheral portion of the outer tube 11 is melted by a tool horn (not shown) to form the disconnection prevention portion 15b for connection. Then, the tube 20B is pushed into the inner tube 12B from below to be connected.

特公平１−１６１８６号公報Japanese Patent Publication No. 1-16186 特開２００６−１８１２２２号公報JP, 2006-181222, A 特開２０１３−１９２６３２号公報JP, 2013-192632, A

本発明は、（１）外管と内管の間に挿入用空間を形成した点滴筒などの樹脂成形品に、前記挿入用空間内にチューブを圧接した状態で直接一体に接続することを課題としている。特に（２）工具ホーンの中心の孔にチューブを通す作業と外す作業が不要である。（３）外管内壁とチューブ（可撓性チューブ）の外周面を溶着する。（４）外周面に段差のないチューブのときも、外周面に段差のあるチューブのときも、段差の山がつるまき状につながっているチューブのときも、チューブと樹脂成形品の当接部が全周にわたって完全密着するように接続する、という従来技術で解決されていなかった課題を解決する、新たな溶着方法および装置を提供することを目的とし、生産性が高く、離脱防止効果が高く、チューブと樹脂成形品の当接部が全周にわたって完全密着して接続する新しい超音波振動溶着方法および装置を実用化することを課題としている。 SUMMARY OF THE INVENTION (1) It is an object of the present invention to (1) directly and integrally connect a resin molded article such as a drip tube in which an insertion space is formed between an outer tube and an inner tube in a state where the tube is pressed into the insertion space. I am trying. In particular, (2) the work of inserting and removing the tube through the hole at the center of the tool horn is unnecessary. (3) Weld the inner wall of the outer tube and the outer peripheral surface of the tube (flexible tube). (4) Whether the tube has no step on the outer peripheral surface, the tube has a step on the outer peripheral surface, or the tube in which the peaks of the step are connected in a spiral shape, the contact portion between the tube and the resin molded product The purpose of the invention is to provide a new welding method and device, which solves the problem that has not been solved by the prior art, that is, to make a complete contact over the entire circumference, with high productivity and high separation prevention effect. It is an object of the present invention to put into practical use a new ultrasonic vibration welding method and apparatus in which the abutting portion of the tube and the resin molded product are completely adhered and connected over the entire circumference.

本発明の可撓性チューブと樹脂成形品の超音波振動溶着装置は、外管と内管の間に挿入用空間を形成した樹脂成形品を支持するベース台と、可撓性チューブを把持して、前記ベース台に支持した前記樹脂成形品の挿入用空間に当該可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させる押し込み手段と、前記樹脂成形品の外管外壁の一面側に当接する工具ホーンと、前記樹脂成形品の外管外壁の工具ホーンと反対の他面側に当接するアンビルと、前記樹脂成形品の外管外壁を前記工具ホーンと前記アンビルで押圧して、前記半径方向に膨張した前記外管と前記可撓性チューブを押し戻す押し戻し手段と、前記工具ホーンを超音波振動させる超音波振動手段と、前記工具ホーンと前記アンビルに対して、前記樹脂成形品を前記可撓性チューブ先端の軸芯の周りに所定角度、相対的に回転させる回転手段と、前記押し込み手段と、前記押し戻し手段と、前記超音波振動手段と、前記回転手段と、を制御する制御手段と、を有し、前記制御手段に、
（１）前記押し込み手段により、前記ベース台に支持した前記樹脂成形品の挿入用空間に可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させ、
（２）前記可撓性チューブの先端と外管を膨張させた状態から、前記押し戻し手段により、前記樹脂成形品の外管外壁を前記工具ホーンと前記アンビルで押圧して、半径方向に膨張した前記外管と前記可撓性チューブを押し戻し、
（３）前記超音波振動手段により、前記工具ホーンを超音波振動させ、前記樹脂成形品の外管内壁と可撓性チューブの外周面を加圧した状態で溶着し、
（４）前記押し戻し手段により、前記工具ホーンと前記アンビルを前記樹脂成形品から離し、
（５）前記回転手段により、前記工具ホーンと前記アンビルに対して前記樹脂成形品を前記可撓性チューブ先端の軸芯の周りに所定角度、相対的に回転させ、
（６）上記（２）から（５）を所定回数繰り返し、
（７）前記押し戻し手段により、前記工具ホーンと前記アンビルを前記樹脂成形品から離すとともに、前記押し込み手段を前記樹脂成形品から離し、前記ベース台から前記樹脂成形品を取り出せるようにする、
工程を実行することにより、可撓性チューブを、樹脂成形品に設けた外管との間の挿入用空間に一体接続するようにしている。 The ultrasonic vibration welding apparatus for a flexible tube and a resin molded product of the present invention holds a flexible tube and a base for supporting a resin molded product having an insertion space formed between an outer tube and an inner tube. And a pushing means for pushing the tip of the flexible tube into the insertion space of the resin molded article supported by the base to expand the tip of the flexible tube and the outer tube in the radial direction, and the resin. A tool horn that abuts on one surface side of the outer pipe outer wall of the molded product, an anvil that abuts on the other surface side of the outer pipe outer wall of the resin molded product opposite to the tool horn, and an outer pipe outer wall of the resin molded product A pushing back means for pushing back the outer tube expanded in the radial direction and the flexible tube by pressing with a horn and the anvil, an ultrasonic vibration means for ultrasonically vibrating the tool horn, the tool horn and the anvil. On the other hand, a rotation means for relatively rotating the resin molded product around the axis of the flexible tube tip by a predetermined angle, the pushing means, the pushing back means, and the ultrasonic vibrating means, The rotating means, and a control means for controlling the, the control means,
(1) By the pushing means, the tip of the flexible tube is pushed into the space for inserting the resin molded product supported on the base table, and the tip of the flexible tube and the outer tube are radially expanded,
(2) From the state in which the tip of the flexible tube and the outer tube are expanded, the outer wall of the outer tube of the resin molded product is pressed by the tool horn and the anvil by the pushing-back means to expand in the radial direction. Pushing back the outer tube and the flexible tube,
(3) The tool horn is ultrasonically vibrated by the ultrasonic vibrating means, and the inner wall of the outer tube of the resin molded product and the outer peripheral surface of the flexible tube are welded under pressure.
(4) The push-back means separates the tool horn and the anvil from the resin molded product,
(5) The rotating means relatively rotates the resin molded product with respect to the tool horn and the anvil about a shaft center of the flexible tube by a predetermined angle.
(6) The above (2) to (5) are repeated a predetermined number of times,
(7) The push-back means separates the tool horn and the anvil from the resin molded product, and the push-in means separates from the resin molded product so that the resin molded product can be taken out from the base base.
By executing the process, the flexible tube is integrally connected to the insertion space between the flexible tube and the outer tube provided in the resin molded product.

本発明の可撓性チューブと樹脂成形品の超音波振動溶着方法は、上記の可撓性チューブと樹脂成形品の超音波振動溶着装置に用いている発明を方法の発明として具現化したものである。 The ultrasonic vibration welding method for a flexible tube and a resin molded product of the present invention is a method embodying the invention used in the ultrasonic vibration welding device for a flexible tube and a resin molded product described above. is there.

本発明によると、チューブと樹脂成形品の溶着を生産性良く、離脱防止効果が高く、チューブと樹脂成形品の当接部が全周にわたって完全密着して接続することが可能となる。
より具体的には、（１）外管と内管の間に挿入用空間を形成した点滴筒などの樹脂成形品に、前記挿入用空間内にチューブを圧接した状態で直接一体に接続することができる。
特に（２）従来のように、工具ホーンの中心に開けた孔にチューブを通したり外したりすることが無い。（３）外管内壁とチューブの外周面が溶けて互いに入り込んだ形で溶着し、チューブと樹脂成形品の接続強度が大きい。（４）外周面に段差がないチューブ、あるいは外周面に段差のあるチューブのそれぞれについてチューブと樹脂成形品の当接部が全周にわたって完全密着して接続する、という効果がある。 According to the present invention, the tube and the resin molded product can be welded together with good productivity and a high effect of preventing separation, and the contact portion between the tube and the resin molded product can be completely adhered and connected over the entire circumference.
More specifically, (1) to directly and integrally connect a resin molded product such as a drip tube having an insertion space formed between an outer tube and an inner tube in a state where the tube is pressed into the insertion space. You can
In particular, (2) the tube is not inserted into or removed from the hole formed in the center of the tool horn as in the conventional case. (3) The inner wall of the outer tube and the outer peripheral surface of the tube are melted and welded together so that the tube and the resin molded product have a high connection strength. (4) With respect to each of the tube having no step on the outer peripheral surface or the tube having the step on the outer peripheral surface, there is an effect that the contact portion of the tube and the resin-molded product is completely adhered and connected over the entire circumference.

更に詳しく説明すれば、（５）本発明の「チューブを挿入用空間内で軸方向に加圧し、チューブの先端部分を軸方向に圧縮し、チューブと外管を半径方向に膨張させた状態で保持し、この状態で外管外壁を工具ホーンとアンビルで押圧し、外管の膨張部分を押し戻した状態」とすることによって、「チューブの外周面に軸方向に波を打つ段差（シワ）ができるようにシワ寄せ用の加圧をした状態」とする作用、効果を有している。 More specifically, (5) in the state of "the tube is axially pressurized in the insertion space, the tip portion of the tube is axially compressed, and the tube and the outer tube are expanded in the radial direction. By holding it and pressing the outer wall of the outer tube with the tool horn and anvil in this state to push back the expanded part of the outer tube, "the step (wrinkle) that undulates the outer peripheral surface of the tube in the axial direction is formed. It has the action and effect of "pressurizing for wrinkling as much as possible".

そのため本発明では、外周面に段差のないチューブについて、シワ寄せ用の加圧をすることにより、チューブの外周面に微細なシワができた状態、或いは微細なシワができていなくても外周面に微細なシワができる寸前の状態にしている。このことにより、チューブの外周面に微細なシワができた状態、或いはチューブの外周面に微細なシワができる寸前の状態で外管外壁から超音波振動を加え、外管内壁とチューブの外周面が溶けて互いに入り込んだ形で溶着させ、チューブと樹脂成形品の接続強度を大きくしている。 Therefore, in the present invention, for a tube having no step on the outer peripheral surface, by applying pressure for wrinkling, a state where fine wrinkles are formed on the outer peripheral surface of the tube, or even if fine wrinkles are not formed on the outer peripheral surface It is on the verge of having fine wrinkles. As a result, ultrasonic vibration is applied from the outer wall of the outer tube to the outer wall of the outer tube while the outer wall of the tube is finely wrinkled, or just before the outer surface of the tube is finely wrinkled. Are melted and welded together so that the connection strength between the tube and the resin molded product is increased.

また、本発明のチューブとして、外周面に段差があるチューブを用いれば、チューブの外周面の段差に、外管内壁とチューブの外周面が互いに溶けて入り込んだ形で溶着する。このことにより、チューブと樹脂成形品の接続強度を大きくしている。
本願発明の超音波振動溶着方法と超音波振動溶着装置を用いると、外周面に段差のないチューブと樹脂成形品との接続も、外周面に段差のあるチューブと樹脂成形品との接続も、外管内壁とチューブの外周面が互いに溶けて入り込んだ形で溶着して大きい接続強度が得られるという効果がある。 If a tube having a step on the outer peripheral surface is used as the tube of the present invention, the inner wall of the outer tube and the outer peripheral surface of the tube are fused and welded to the step on the outer peripheral surface of the tube. This increases the connection strength between the tube and the resin molded product.
Using the ultrasonic vibration welding method and the ultrasonic vibration welding device of the present invention, the connection between the tube having no step on the outer peripheral surface and the resin molded product, the connection between the tube having the step on the outer peripheral surface and the resin molded product, There is an effect that the inner wall of the outer tube and the outer peripheral surface of the tube are melted into each other and welded together to obtain a high connection strength.

本発明の実施形態１に係る超音波振動溶着装置の要部側面図。1 is a side view of a main part of an ultrasonic vibration welding device according to a first embodiment of the present invention. 本発明の実施形態１に係る超音波振動溶着装置の溶着準備作業時の要部側面図。FIG. 3 is a side view of a main part of the ultrasonic vibration welding device according to the first embodiment of the present invention during welding preparation work. 本発明の実施形態１に係る超音波振動溶着装置の溶着作業時の要部側面図。FIG. 3 is a side view of a main part of the ultrasonic vibration welding device according to the first embodiment of the present invention during welding work. 本発明の実施形態１に係る超音波振動溶着装置で、樹脂成形品と外周面に段差のないチューブを溶着する工程(Ａ)〜（Ｆ）を示した図。The figure which showed the process (A)-(F) which welds the resin molding and the tube without a level|step difference in the outer peripheral surface with the ultrasonic vibration welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る超音波振動溶着装置を用いた溶着作業手順を示したフローチャート。The flowchart which showed the welding work procedure using the ultrasonic vibration welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る超音波振動溶着装置の第１の変形例で、樹脂成形品と外周面に段差のないチューブを溶着する工程(Ａ)〜（Ｆ）を示した図。The figure which showed the process (A)-(F) which welds the resin-molded product and the tube without a level|step difference in the 1st modification of the ultrasonic vibration welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る超音波振動溶着装置の第２の変形例で、樹脂成形品と外周面に段差のないチューブを溶着する工程（Ａ）および（Ｂ）を示した図。The figure which showed the process (A) and (B) which welds the resin-molded article and the tube without a level|step difference in the 2nd modification of the ultrasonic vibration welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る超音波振動溶着装置の第３の変形例で、樹脂成形品と外周面に段差のないチューブを溶着する工程（Ａ）および（Ｂ）を示した図。The figure which showed the process (A) and (B) which welds the resin-molded product and the tube without a level|step difference in the 3rd modification of the ultrasonic vibration welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る超音波振動溶着装置の第４の変形例で、樹脂成形品と外周面に段差のない２層構造チューブを溶着する工程(Ａ)〜（Ｄ）を示した図。In the 4th modification of the ultrasonic vibration welding device concerning Embodiment 1 of the present invention, the figure which showed process (A)-(D) which welds a resin molding and a two-layer structure tube without a level difference to an outer peripheral surface. .. 本発明の実施形態２に係る超音波振動溶着装置で、樹脂成形品と外周面に段差があるチューブを溶着する工程（Ａ）〜（Ｆ）を示した図。The figure which showed the process (A)-(F) which welds the resin molding and the tube which has a level|step difference in an outer peripheral surface with the ultrasonic vibration welding apparatus which concerns on Embodiment 2 of this invention. 本発明の実施形態２に係る超音波振動溶着装置の第１の変形例で、樹脂成形品に外周面に段差があるチューブを溶着する工程（Ａ）〜（Ｃ）を示した図。In the 1st modification of the ultrasonic vibration welding device concerning Embodiment 2 of the present invention, the figure showing process (A)-(C) of welding a tube which has a level difference in a peripheral face to a resin molding. 本発明の実施形態２に係る超音波振動溶着装置の第１の変形例で、樹脂成形品に外周面に段差があるチューブを溶着する工程（Ｄ）および（Ｅ）を示した図。The figure which showed the process (D) and (E) which welds the tube which has a level|step difference in an outer peripheral surface to the resin molded product in the 1st modification of the ultrasonic vibration welding apparatus which concerns on Embodiment 2 of this invention. 図１２の工程（Ｅ）における、矢視ＡＬ１３で示す断面図。Sectional drawing in line AL13 in process (E) of FIG. 本発明の実施形態２に係る超音波振動溶着装置の第１の変形例で、樹脂成形品に外周面に段差があるチューブを溶着した状態を示した図。The figure which showed the state which welded the tube which has a level|step difference in the outer peripheral surface to the resin molded product in the 1st modification of the ultrasonic vibration welding apparatus which concerns on Embodiment 2 of this invention. 本発明の実施形態２に係る超音波振動溶着装置の第２の変形例で、樹脂成形品に外周面に段差があるチューブを溶着する工程（Ａ）〜（Ｄ）を示した図。In the 2nd modification of the ultrasonic vibration welding device which concerns on Embodiment 2 of this invention, the figure which showed the process (A)-(D) which welds the tube which has a level|step difference in an outer peripheral surface to a resin molded product. 本発明の実施形態３に係る超音波振動溶着装置で、外管内壁に予め半径方向に段差（溝）を設け、外周面に段差のないチューブを溶着する工程（Ａ）〜（Ｄ）を示した図。In the ultrasonic vibration welding device according to the third embodiment of the present invention, steps (A) to (D) are shown in which a step (groove) is provided in advance on the inner wall of the outer tube in the radial direction and a tube having no step is welded on the outer peripheral surface. The figure. 従来の点滴筒にチューブを接続したときの一部を断面とした外観図。The external view which made a part a cross section when connecting a tube to the conventional drip tube. 従来の点滴筒にチューブを接続したときの接続部分の拡大断面図。The expanded sectional view of the connection part when a tube is connected to the conventional drip tube. 従来の超音波振動溶着装置を用いてチューブと樹脂成形品を接続する要部断面図。Sectional drawing of the principal part which connects a tube and a resin molded product using the conventional ultrasonic vibration welding apparatus. 従来の超音波振動溶着装置を用いてチューブと樹脂成形品を接続した要部の拡大断面図。The expanded sectional view of the principal part which connected the tube and the resin molded product using the conventional ultrasonic vibration welding apparatus. 従来の超音波振動溶着装置の工具ホーンの外観斜視図。The external perspective view of the tool horn of the conventional ultrasonic vibration welding device. 従来の超音波振動溶着装置の他の工具ホーンの外観斜視図。The external perspective view of the other tool horn of the conventional ultrasonic vibration welding apparatus. 従来の超音波振動溶着装置を用いた接続作業手順を示したフローチャート。The flowchart which showed the connection work procedure using the conventional ultrasonic vibration welding apparatus. 従来の医療器具の一つであるカテーテル用の外周面に段差があるチューブの断面図。Sectional drawing of the tube which has a level|step difference in the outer peripheral surface for catheters which is one of the conventional medical devices. 図２３Ａに示すカテーテル用チューブの、主要寸法の変化を説明するための断面図。Sectional drawing for demonstrating the change of the main dimensions of the catheter tube shown in FIG. 23A. 従来の一対のチューブと軸継手を分離して示した断面図。Sectional drawing which separated and showed a pair of conventional tubes and a shaft coupling. 従来の一対のチューブと軸継手を接続したときの断面図。Sectional drawing at the time of connecting a pair of conventional tubes and a shaft coupling.

本発明は、以下にそれぞれのチューブに対する実施形態を例示することにより、（１）外管と内管の間に挿入用空間を形成した点滴筒などの樹脂成形品に、前記挿入用空間内にチューブを圧接した状態で直接一体に接続できることを説明することとし、特に（２）従来のように、工具ホーンの中心に開けた孔にチューブを通したり外したりすることなく、（３）外管内壁とチューブの外周面が溶けて互いに入り込んだ形で溶着し、その結果、チューブと樹脂成形品の接続強度が大きくなること、（４）外周面に段差がないチューブ、あるいは外周面に段差のあるチューブのそれぞれについて適用可能であること、を説明する。 The present invention illustrates (1) a resin molded article such as a drip tube in which an insertion space is formed between an outer tube and an inner tube in the insertion space by exemplifying embodiments for respective tubes below. It will be explained that the tubes can be directly and integrally connected in a state of being pressed against each other. In particular, (2) without inserting or removing the tube through the hole formed in the center of the tool horn as in the conventional case, (3) inside the outer tube The wall and the outer peripheral surface of the tube are melted and welded together so that the connection strength between the tube and the resin molded product is increased. (4) A tube with no step on the outer peripheral surface or a step on the outer peripheral surface It is described that each tube is applicable.

なお、後述する実施形態１から３では、図示を簡単にするため、樹脂成形品に「チューブの軸継手」を用いた例を示す。「チューブの軸継手」は、内管の両端が軸方向に外管底壁（挿入用空間底壁）からそれぞれ反対方向に突き出ている形をしているが、外管と、外管内に同軸方向に配置され、軸方向に突出している内管が備えられ、外管と内管の間に挿入用空間が形成されていることは「点滴筒」と同じである。 In addition, in Embodiments 1 to 3 to be described later, an example in which a "tube shaft joint" is used for a resin molded product is shown in order to simplify the illustration. The “tube shaft joint” has a shape in which both ends of the inner pipe project in the opposite axial directions from the outer pipe bottom wall (insertion space bottom wall), but the outer pipe and the outer pipe are coaxial. It is the same as the “drip tube” in that it is provided with an inner tube that is arranged in the direction and that projects in the axial direction, and that an insertion space is formed between the outer tube and the inner tube.

また、図１から図３に示した、本発明の実施形態１に係る超音波振動溶着装置の要部側面図では、チューブと樹脂成形品（軸継手）の軸芯を水平方向として図示し、図４、図６から図１６の工程を示した図では、チューブと樹脂成形品（軸継手）の軸芯を水平方向と垂直方向の両方を混在して図示したが、図面上のスペースの都合によるものであることを理解されたい。
（実施形態１） Further, in the side view of the main part of the ultrasonic vibration welding device according to the first embodiment of the present invention shown in FIGS. 1 to 3, the tube and the resin molded product (shaft coupling) are illustrated with their axes being horizontal. In the drawings showing the steps of FIG. 4 and FIGS. 6 to 16, the tube and the shaft center of the resin molded product (shaft coupling) are illustrated in a mixed manner in both the horizontal direction and the vertical direction. Please understand that it is due to.
(Embodiment 1)

実施形態１では、樹脂成形品（軸継手）１０Ｂに外周面に段差のない可撓性チューブ２０を溶着する超音波振動溶着方法および装置を説明する。
実施形態１の樹脂成形品１０Ｂは、外管１１と、外管１１内に同軸方向に配置された内管１２を備えており、外管１１は、外管１１および内管１２を連結する円環状の外管底壁１１ｃを有しており、当該外管１１の内側表面（外管内壁）１１ａ、外管底壁１１ｃおよび内管１２によって、これらの間に環状の挿入用空間１３が形成されている。この挿入用空間１３には、樹脂成形品１０Ｂと接続させる樹脂チューブ２０の端部２０ａが挿入される。 In the first embodiment, an ultrasonic vibration welding method and apparatus for welding a flexible tube 20 having no step on the outer peripheral surface to a resin molded product (shaft coupling) 10B will be described.
The resin molded product 10B of the first embodiment includes an outer pipe 11 and an inner pipe 12 arranged coaxially in the outer pipe 11, and the outer pipe 11 is a circle connecting the outer pipe 11 and the inner pipe 12. It has an annular outer tube bottom wall 11c, and the inner surface (outer tube inner wall) 11a of the outer tube 11, the outer tube bottom wall 11c, and the inner tube 12 form an annular insertion space 13 therebetween. Has been done. The end portion 20a of the resin tube 20 connected to the resin molded product 10B is inserted into the insertion space 13.

樹脂成形品１０Ｂおよびチューブ２０は、用途に応じて、超音波振動溶着による接続に好適な樹脂素材が用いられ、特に限定しないが、例えば、樹脂成形品１０Ｂの構成材料としては、ポリエチレン、ポリプロピレン等のポリオレフィン、即ち非塩素系材料を例示することができる。
また、チューブ２０の構成材料としては、ポリエチレン、ポリプロピレン等のポリオレフィン、軟質ポリ塩化ビニル、エチレン−酢酸ビニル共重合体、ポリアミド等の樹脂材料や、天然ゴム、シリコーンゴム、スチレン−ブタジエンゴム等の各種ゴム材料、各種熱可塑性エラストマー等の弾性材料を例示することができる。 A resin material suitable for connection by ultrasonic vibration welding is used for the resin molded product 10B and the tube 20, depending on the application, and is not particularly limited. For example, as a constituent material of the resin molded product 10B, polyethylene, polypropylene, or the like is used. The polyolefin, that is, a non-chlorine-based material can be exemplified.
As the constituent material of the tube 20, resin materials such as polyolefins such as polyethylene and polypropylene, soft polyvinyl chloride, ethylene-vinyl acetate copolymer, polyamides, and various kinds of natural rubber, silicone rubber, styrene-butadiene rubber, etc. Examples of elastic materials include rubber materials and various thermoplastic elastomers.

また、樹脂成形品１０Ｂおよびチューブ２０の形状や外形寸法は、特に限定するものではないが、チューブ２０および外管１１の肉厚は、軸方向および径方向の加圧や圧縮により、径方向に容易に膨出、収縮することができる可撓性やシワ寄せ加工性を備えることが望ましく、接続工程における素材の加熱温度にも依るが、実際に使用する上で一定強度が必要であることから、チューブ２０および外管１１の肉厚は、例えば１〜２ｍｍ程度に好適に設定される。 Further, the shapes and outer dimensions of the resin molded product 10B and the tube 20 are not particularly limited, but the wall thicknesses of the tube 20 and the outer tube 11 are radial in the radial direction due to axial and radial pressure and compression. It is desirable to have flexibility and wrinkle workability that can easily swell and shrink, and since it depends on the heating temperature of the material in the connection process, it requires a certain strength for actual use. The wall thicknesses of the tube 20 and the outer tube 11 are preferably set to, for example, about 1 to 2 mm.

図１から図３に、本発明の実施形態１に係る超音波振動溶着装置の要部側面図を示した。樹脂成形品１０Ｂとチューブ２０を接続する超音波振動溶着装置について、図１では本発明の実施形態１に係る超音波振動溶着装置の要部側面図を示し、図２では、溶着準備作業時の状態を示し、図３では、溶着作業時の状態を示している。なお、図１の本発明の実施形態１に係る超音波振動溶着装置は、装置の要部のみを示し、樹脂成型品１０Ｂとチューブ２０は示していない。図２、３には、樹脂成型品１０Ｂとチューブ２０も示したので、これらの図を総合すれば、それらの構造を容易に理解できるであろう。 1 to 3 show side views of essential parts of an ultrasonic vibration welding apparatus according to Embodiment 1 of the present invention. Regarding the ultrasonic vibration welding apparatus for connecting the resin molded product 10B and the tube 20, FIG. 1 shows a side view of the main part of the ultrasonic vibration welding apparatus according to the first embodiment of the present invention, and FIG. FIG. 3 shows the state, and FIG. 3 shows the state during the welding work. The ultrasonic vibration welding apparatus according to the first embodiment of the present invention in FIG. 1 shows only the main parts of the apparatus, and does not show the resin molded product 10B and the tube 20. 2 and 3, the resin molded product 10B and the tube 20 are also shown. Therefore, if these drawings are put together, their structures will be easily understood.

図１の本発明の実施形態１に係る超音波振動溶着装置では、装置のフレーム１００に垂直方向に支柱８１を設け、支柱８１の中央に樹脂成形品１０Ｂを取り付ける孔（「支柱孔」という）８０ａを開けたベース台８０を形成し、支柱孔８０ａの位置を基準に支柱８１の上下には水平方向に延びる枝（ブランチ）８４、８５が設けてある。
上方のブランチ８４にはエアシリンダー３４が取り付けてあり、エアシリンダー３４の先端にはバネ３３と移動枠３１が取り付けてある。そして、移動枠３１には、圧電素子を用いた超音波振動手段３２と、この超音波振動手段３２と一体に組み立てられた工具ホーン３０が取り付けてある。工具ホーン３０は、バネ３３により支柱孔８０ａの位置方向に向けて付勢されていて、エアシリンダー３４が吸引動作すると、工具ホーン３０が支柱孔８０ａの位置から遠ざかるようにしてある。 In the ultrasonic vibration welding apparatus according to the first embodiment of the present invention shown in FIG. 1, a column 81 is provided in the frame 100 of the apparatus in a vertical direction, and a hole for attaching the resin molded product 10B to the center of the column 81 (referred to as a "column hole"). A base pedestal 80 having an opening 80a is formed, and branches 84 and 85 extending horizontally are provided above and below the stanchion 81 based on the position of the stanchion hole 80a.
The air cylinder 34 is attached to the upper branch 84, and the spring 33 and the moving frame 31 are attached to the tip of the air cylinder 34. Then, an ultrasonic vibrating means 32 using a piezoelectric element and a tool horn 30 assembled integrally with the ultrasonic vibrating means 32 are attached to the moving frame 31. The tool horn 30 is biased toward the position of the support hole 80a by a spring 33, and when the air cylinder 34 performs a suction operation, the tool horn 30 moves away from the position of the support hole 80a.

下方のブランチ８５にはエアシリンダー４４が取り付けてあり、エアシリンダー４４の先端にはバネ４３とアンビル４０が取り付けてある。アンビル４０はバネ４３により支柱孔８０ａの位置方向に向けて付勢されていて、エアシリンダー４４が吸引動作すると、アンビル４０が支柱孔８０ａの位置から遠ざかるようにしてある。
フレーム１００の右側には、チューブ押し込み部材５０、５１のガイドテーブル８６を設けていて、チューブ押し込み部材５０は、部材５１の蓋として、部材５１に対して上下方向にコイルバネ等の手段で弾性的に支えられているとともに、上下方向に着脱自在に支えられている。ガイドテーブル８６の上面にはカム状スライド面８６ａがあり、チューブ押し込み部材５０、５１を（例えば、ボールねじとモータの組み合わせ等による、図示しない駆動手段により）、図において右から左方向に移動すると、チューブ押し込み部材５０、５１が、チューブ２０を把持した状態で、チューブ２０の先端を樹脂成形品１０Ｂの挿入用空間１３（図２および後述の図４参照）に押し込むようにしている。 An air cylinder 44 is attached to the lower branch 85, and a spring 43 and an anvil 40 are attached to the tip of the air cylinder 44. The anvil 40 is biased by the spring 43 toward the position of the support hole 80a, and when the air cylinder 44 sucks, the anvil 40 moves away from the position of the support hole 80a.
A guide table 86 for the tube pushing members 50 and 51 is provided on the right side of the frame 100, and the tube pushing member 50 serves as a lid for the member 51 and elastically moves vertically with respect to the member 51 by means such as a coil spring. Not only is it supported, but it is also supported vertically in a removable manner. There is a cam-shaped slide surface 86a on the upper surface of the guide table 86, and when the tube pushing members 50 and 51 are moved from the right to the left in the figure (by a driving means (not shown) such as a combination of a ball screw and a motor). The tube pushing members 50 and 51 push the tip of the tube 20 into the insertion space 13 (see FIG. 2 and FIG. 4 described later) of the resin molded product 10B while holding the tube 20.

ベース台８０の図において左側には、支柱孔８０ａと同軸の中空円柱部分８２を設けている。中空円柱部分８２に外嵌して、樹脂成形品１０Ｂを支持する支持キャップ７１が回転可能に被せられている。
支持キャップ７１には支柱孔８０ａと同軸の支持孔７１ａが開けてある。また、中空円柱部分８２の紙面左端面と支持キャップ７１には、複数の位置決め用穴８３ａ、８３ｂと位置決めピン７２を挿入する貫通孔７１ｂがそれぞれ同心円周上に適宜のピッチで設けられている。これらの支柱孔８０ａ、支持孔７１ａ、貫通孔７１ｂ、位置決め用穴８３ａ、８３ｂは、樹脂成形品１０Ｂを支柱孔８０ａと同軸の支持孔７１ａで支持した状態で、中空円柱部分８２に対して支持キャップ７１を回転させて、位置決めピン７２を所望の位置決め用穴８３ａ、８３ｂのいずれかに入れて位置決めするために設けてある。 On the left side of the base 80 in the figure, a hollow cylindrical portion 82 coaxial with the support hole 80a is provided. A support cap 71 that fits over the hollow cylindrical portion 82 and supports the resin molded product 10B is rotatably covered.
The support cap 71 has a support hole 71a coaxial with the support hole 80a. Further, the left end surface of the hollow cylindrical portion 82 on the paper surface and the support cap 71 are provided with through holes 71b into which a plurality of positioning holes 83a and 83b and a positioning pin 72 are inserted, respectively, on a concentric circumference at an appropriate pitch. The support hole 80a, the support hole 71a, the through hole 71b, and the positioning holes 83a, 83b are supported by the hollow cylindrical portion 82 in a state where the resin molded product 10B is supported by the support hole 71a coaxial with the support hole 80a. It is provided to rotate the cap 71 and insert the positioning pin 72 into any of the desired positioning holes 83a and 83b for positioning.

図２では、上記構造をした本発明の装置を用いて、樹脂成形品１０Ｂをベース台８０に取り付け、樹脂成形品１０Ｂの挿入用空間１３にチューブ２０の先端２０ａを入れて、チューブ押し込み部材５０、５１でチューブ２０を把持する寸前の状態、つまり溶着準備作業時の状態を示している。
そして、図２の状態から、挿入用空間１３にチューブ２０の先端２０ａを押し込んで樹脂成形品１０Ｂの外管１１を半径方向に膨張させた後、図示していない制御部によって、図３のように、エアシリンダー３４と４４の吸引動作を止めて、バネ３３、３４の付勢力により、工具ホーン３０とアンビル４０で外管外壁１１ｂを押圧する。そして、外管１１が半径方向に膨張した分を元の円筒状の姿に押し戻し、超音波振動手段３２により工具ホーン３０を振動させ、外管内壁１１ａとチューブ２０の外周面２０ｂを溶融させて一体接続する溶着作業を行う。 In FIG. 2, using the apparatus of the present invention having the above structure, the resin molded product 10B is attached to the base 80, the tip 20a of the tube 20 is inserted into the insertion space 13 of the resin molded product 10B, and the tube pushing member 50 is inserted. , 51 indicates a state just before gripping the tube 20, that is, a state at the time of welding preparation work.
Then, from the state of FIG. 2, the tip 20a of the tube 20 is pushed into the insertion space 13 to expand the outer tube 11 of the resin molded product 10B in the radial direction, and then as shown in FIG. Then, the suction operation of the air cylinders 34 and 44 is stopped, and the outer horn outer wall 11b is pressed by the tool horn 30 and the anvil 40 by the urging force of the springs 33 and 34. Then, the radially expanded portion of the outer tube 11 is pushed back to its original cylindrical shape, the tool horn 30 is vibrated by the ultrasonic vibrating means 32, and the outer tube inner wall 11a and the outer peripheral surface 20b of the tube 20 are melted. Perform welding work to connect them together.

図３に示す状態で、外管内壁１１ａとチューブ２０の外周面２０ｂが溶着し、超音波振動手段３２の超音波振動を止めて、溶着部分が固化したら、エアシリンダー３４と４４を吸引動作させ、外管外壁１１ｂから工具ホーン３０とアンビル４０を離す。そして作業者が、位置決めピン７２を中空円筒部分８２の位置決め孔８３ａから抜いて、支持キャップ７１を中空円筒部分８２の周りに回転させ、他の位置決め用穴８３ｂに入れて位置決めする。支持キャップ７１の回転とともに、樹脂成形品１０Ｂとチューブ２０の溶着部分と未溶着部分が入れ替わり、溶着部分がアンビル４０に対向し、未溶着部分が工具ホーン３０に対向する。 In the state shown in FIG. 3, when the inner wall 11a of the outer tube and the outer peripheral surface 20b of the tube 20 are welded and the ultrasonic vibration of the ultrasonic vibration means 32 is stopped and the welded portion is solidified, the air cylinders 34 and 44 are suctioned. The tool horn 30 and the anvil 40 are separated from the outer tube outer wall 11b. Then, the operator pulls out the positioning pin 72 from the positioning hole 83a of the hollow cylindrical portion 82, rotates the support cap 71 around the hollow cylindrical portion 82, and inserts it into the other positioning hole 83b for positioning. With the rotation of the support cap 71, the welded portion and the unwelded portion of the resin molded product 10B and the tube 20 are replaced with each other, the welded portion faces the anvil 40, and the unwelded portion faces the tool horn 30.

そして、再び、エアシリンダー３４と４４の吸引動作を止めて、バネ３３、３４の力で、外管１１の半径方向に膨張した分の残っている未溶着部分を元の円筒状の姿に押し戻し、超音波振動手段３２により工具ホーン３０を振動させ、外管内壁１１ａとチューブ２０の外周面を溶融させ、一体に接続する。
なお、図１から図３の説明では、位置決めピン７２による位置決めを、中空円柱部分８２の２つの位置決め用穴８３ａ、８３ｂで説明したが、この超音波振動溶着作業時の樹脂成型品とチューブの反転作業における回動角度については、位置決め用穴などの数を必要により適宜増やして、所望の回動角度を定め、溶着重ね代を考慮して行なうことができる。 Then, the suction operation of the air cylinders 34 and 44 is stopped again, and the remaining unwelded portion of the outer tube 11 expanded in the radial direction is pushed back to the original cylindrical shape by the force of the springs 33 and 34. The tool horn 30 is vibrated by the ultrasonic vibrating means 32 to melt the outer tube inner wall 11a and the outer peripheral surface of the tube 20 and integrally connect them.
In addition, in the description of FIGS. 1 to 3, the positioning by the positioning pin 72 has been described using the two positioning holes 83a and 83b of the hollow cylindrical portion 82, but the resin molded product and the tube during the ultrasonic vibration welding work are described. Regarding the turning angle in the reversing work, the number of positioning holes or the like can be appropriately increased as necessary to determine a desired turning angle and the welding overlap margin can be taken into consideration.

外管内壁１１ａとチューブ２０の全ての外周面の溶着作業が終了したら、エアシリンダー３４と４４を吸引動作させ、外管外壁１１ｂから工具ホーン３０とアンビル４０を離し、チューブ押し込み部材５０、５１をフレーム１００の右側に移動させて、チューブ押し込み部材５０、５１をチューブ２０から離し、一体となったチューブ２０と樹脂成形品１０Ｂを装置から取り出す。 When the welding work of all the outer peripheral surfaces of the outer tube inner wall 11a and the tube 20 is completed, the air cylinders 34 and 44 are suctioned to separate the tool horn 30 and the anvil 40 from the outer tube outer wall 11b, and the tube pushing members 50 and 51 are attached. It is moved to the right side of the frame 100, the tube pushing members 50 and 51 are separated from the tube 20, and the integrated tube 20 and resin molded product 10B are taken out from the apparatus.

本発明の装置の構成要素は以下のものが含まれる。
（ａ）樹脂成形品を支持するベース台（８０）、
（ｂ）樹脂成形品の内管をチューブの端部内に挿入した状態で当該チューブを把持し、樹脂成形品の挿入用空間に前記チューブの先端部分を嵌め込み、前記外筒底壁に押し付けて加圧するチューブの押し込み手段（５０、５１）、
（ｃ）挿入用空間に嵌め込まれた前記チューブの先端部分に対応する外管を超音波振動させる工具ホーン（３０）
（ｄ）前記工具ホーンに対向する位置に配置され、前記外管外壁を前記工具ホーンに向かって加圧するアンビル（４０）
（ｅ）工具ホーン（３０）とアンビル（４０）で押し戻し動作をさせる押し戻し動作手段（バネ（３３）、（４３）とエアシリンダー（３２）、（４４））、
（ｆ）超音波振動手段（３２）、および
（ｇ）チューブの押し込み手段と、工具ホーンおよびアンビルの押し戻し手段と、並びに超音波振動手段とを制御する制御手段（図示せず）。 The components of the device of the present invention include:
(A) Base stand (80) for supporting the resin molded product,
(B) The inner tube of the resin molded product is inserted into the end portion of the tube, and the tube is gripped, the tip portion of the tube is fitted into the insertion space of the resin molded product, and the tube is pressed against the outer cylinder bottom wall. A pressing means (50, 51) for pressing the tube,
(C) A tool horn (30) for ultrasonically vibrating an outer tube corresponding to the tip portion of the tube fitted in the insertion space.
(D) An anvil (40) arranged at a position facing the tool horn and pressing the outer wall of the outer tube toward the tool horn.
(E) Push-back operation means (springs (33), (43) and air cylinders (32), (44)) for performing a push-back operation with the tool horn (30) and the anvil (40),
(F) Ultrasonic vibrating means (32), and (g) Control means (not shown) for controlling the tube pushing means, the tool horn and anvil pushing back means, and the ultrasonic vibrating means.

上記に含めていない「ベース台８０の紙面左側に中空円柱部分８２を設け、中空円柱部分８２に、樹脂成形品１０Ｂを支持する支持キャップ７１を回転可能に被せている回転手段」については、電動で支持キャップ７１を所定角度回転する回転手段として、上記制御手段で制御しても良い。また、これを設けずに、ベース台８０で樹脂成形品１０Ｂを支持した状態で、作業者が樹脂成形品１０Ｂをつまんで回転させるという手作業に置き換えても良い。その他、図１から３の実施形態は一例を示したものにすぎず、当業者により任意の構造を採用することができる。 Regarding the "rotating means which is not included in the above and which is provided with a hollow columnar portion 82 on the left side of the surface of the base 80, and a support cap 71 for rotatably covering the resin molded product 10B is rotatably covered over the hollow columnar portion 82", The control means may control as a rotation means for rotating the support cap 71 by a predetermined angle. Alternatively, without providing this, a worker may pinch the resin molded product 10B and rotate it while the resin molded product 10B is supported by the base 80. In addition, the embodiments of FIGS. 1 to 3 are merely examples, and those skilled in the art can adopt any structure.

実施形態１では、チューブ２０を樹脂成形品１０Ｂの内管１２に被せ、チューブ２０の先端２０ａを挿入用空間１３に入れて、チューブ２０を軸方向に加圧して圧縮していくと、チューブ２０が軸方向に圧縮されると同時に半径方向に膨張し、チューブ２０が外管１１を半径方向に膨張させることを利用している。
図４は、本発明の実施形態１に係る超音波振動溶着装置で、樹脂成形品と外周面に段差のないチューブを溶着する工程(Ａ)〜（Ｆ）を示す。即ち、図４の工程（Ａ）に示すように、ベース台８０で支持した樹脂成形品１０Ｂの内管１２にチューブ２０を被せ、図４の工程（Ｂ）のように、チューブ押し込み部材５０、５１で白矢印のように掴んで、チューブ２０を軸方向の下方に、挿入用空間１３に押し込んでいくと、チューブ２０の先端は外管底壁１１ｃに当たる。その後、図４の工程（Ｃ）のように、チューブ２０をチューブ押し込み部材５０、５１で掴んだまま軸方向に加圧すると、チューブ２０は半径方向に膨張し、外管１１も半径方向に膨張する。チューブ２０の半径方向の膨張は、チューブの先端部分が外管底壁１１ｃに当たって行き場がなくなり、挿入用空間１３に充満して生じる。そのため、チューブ２０を押し込んでいくと外管底壁１１ｃより上方に向けて徐々に半径寸法が拡大する。図４の工程（Ｃ）では、外管１１がお椀状に膨張している様子を示している。 In the first embodiment, the tube 20 is covered with the inner tube 12 of the resin molded product 10B, the tip 20a of the tube 20 is put into the insertion space 13, and the tube 20 is axially pressed and compressed. Is compressed in the axial direction and simultaneously expanded in the radial direction, so that the tube 20 expands the outer tube 11 in the radial direction.
FIG. 4 shows steps (A) to (F) of welding a resin-molded product and a tube having no step on the outer peripheral surface thereof in the ultrasonic vibration welding device according to the first embodiment of the present invention. That is, as shown in step (A) of FIG. 4, the tube 20 is put on the inner tube 12 of the resin molded product 10B supported by the base 80, and the tube pushing member 50, as shown in step (B) of FIG. When the tube 20 is gripped at 51 and pushed into the insertion space 13 axially downward, the tip of the tube 20 hits the outer tube bottom wall 11c. Thereafter, as in the step (C) of FIG. 4, when the tube 20 is axially pressurized while being held by the tube pushing members 50 and 51, the tube 20 expands in the radial direction and the outer tube 11 also expands in the radial direction. To do. The expansion of the tube 20 in the radial direction occurs when the distal end portion of the tube hits the outer tube bottom wall 11c and there is no place to go, and the insertion space 13 is filled. Therefore, as the tube 20 is pushed in, the radial dimension gradually increases upward from the outer tube bottom wall 11c. In the step (C) of FIG. 4, the outer tube 11 is shown as expanding in a bowl shape.

外管１１が半径方向に膨張した状態で、図４の工程（Ｄ）のように、外管１１の外側表面（外管外壁）１１ｂを工具ホーン３０とアンビル４０で挟んで押圧する。そして、工具ホーン３０とアンビル４０で外管１１の半径方向の膨張を押さえ込む。このことにより、外管外壁１１ｂは膨らんだ曲面から、膨張していた部分が押さえ込まれた元の円筒面に押し戻される。このとき、チューブ２０も外管１１によって半径方向に押し込まれ、圧縮される。 With the outer tube 11 expanded in the radial direction, the outer surface (outer tube outer wall) 11b of the outer tube 11 is sandwiched between the tool horn 30 and the anvil 40 and pressed as in step (D) of FIG. Then, the tool horn 30 and the anvil 40 suppress the expansion of the outer tube 11 in the radial direction. As a result, the outer tube outer wall 11b is pushed back from the bulging curved surface to the original cylindrical surface where the expanded portion is pressed. At this time, the tube 20 is also pushed by the outer tube 11 in the radial direction and compressed.

なお上記のように、チューブ２０を挿入用空間１３に押し込むことでチューブ２０が半径方向に膨らみ、外管１１も半径方向に膨らむので、外管外壁１１ｂに工具ホーン３０とアンビル４０を当てて、外管１１が膨らんだ分を押し戻している。押し戻すことで、挿入用空間１３での外管内壁１１ａとチューブ２０の外周面２０ｂの圧力が高まる。そのため、工具ホーン３０を押し戻した位置で止めて、超音波振動を与えると、チューブ２０と外管内壁１１ａは溶融して接続する。 As described above, the tube 20 swells in the radial direction by pushing the tube 20 into the insertion space 13, and the outer tube 11 also swells in the radial direction. Therefore, the tool horn 30 and the anvil 40 are applied to the outer tube outer wall 11b, The bulging outer tube 11 is pushed back. By pushing back, the pressure of the outer tube inner wall 11a and the outer peripheral surface 20b of the tube 20 in the insertion space 13 increases. Therefore, when the tool horn 30 is stopped at the pushed back position and ultrasonic vibration is applied, the tube 20 and the outer tube inner wall 11a are melted and connected.

なお、図示していないが、図４の工程（Ｅ）の次に、工具ホーン３０とアンビル４０を図４の工程（Ｃ）のように離し、チューブ２０と外管内壁１１ａの全周が溶着するまで、工具ホーン３０とアンビル４０に対して相対的に、樹脂成形品１０Ｂを所定角度回転させ、再び図４の工程（Ｄ）の押し戻し動作と、図４の工程（Ｅ）の超音波振動溶着動作をする。このことにより、図４の工程（Ｆ）のようにチューブ２０と外管内壁１１ａの全周が溶着して接続される。 Although not shown, after the step (E) of FIG. 4, the tool horn 30 and the anvil 40 are separated as in the step (C) of FIG. 4, and the entire circumferences of the tube 20 and the inner wall 11a of the outer tube are welded. Until the resin horn 30 and the anvil 40 are rotated relative to the tool horn 30 and the anvil 40 by a predetermined angle, the pushing back operation of the step (D) of FIG. 4 and the ultrasonic vibration of the step (E) of FIG. 4 are performed again. Performs welding operation. As a result, the entire circumference of the tube 20 and the outer tube inner wall 11a are welded and connected as in step (F) of FIG.

図４の工程（Ｃ）から図４の工程（Ｄ）の、お椀状に膨張した表面を円筒状の表面にすることは、外管１１の外管外壁１１ｂと外管内壁１１ａの表面積を小さくすることであり、表面の各微小部分が均等に縮まない所にはシワが発生する。この外管１１の膨らんだ表面を元の円筒面に戻す動作は、外管内壁１１ａとチューブ２０の外周面２０ｂにシワを寄せる、シワ寄せ動作をさせていることになる。図４の工程（Ａ）では、チューブ２０の外周面２０ｂに外力がかかっていない自由状態であるため、シワがよっていないが、図４の工程（Ｄ）では、チューブ２０の外周面２０ｂを一度膨らませた後、強制的に圧縮するシワ寄せ動作をしたので、挿入用空間１３の中にあるチューブ２０の外周面２０ｂは、微細なシワがよった、あるいはシワがよっていなくても表面に微細なシワが寄ろうとしている不安定な加圧状態になっている。このチューブ２０の外周面２０ｂを加圧してシワ寄せ動作をした不安定な加圧状態としたまま、図４の工程（Ｅ）のように、工具ホーン３０に超音波振動させると、チューブ２０の外周面２０ｂと外管内壁１１ａが溶けて互いに入り込んだ形で溶着する。そして、チューブ２０と樹脂成形品１０Ｂの所定の接続強度が得られる。 Making the bowl-shaped expanded surface of the step (C) of FIG. 4 to the step (D) of FIG. 4 into a cylindrical surface reduces the surface area of the outer tube outer wall 11b and the outer tube inner wall 11a of the outer tube 11. That is, wrinkles occur where the minute portions of the surface do not shrink uniformly. The operation of returning the bulged surface of the outer tube 11 to the original cylindrical surface is a wrinkling operation of wrinkling the inner wall 11a of the outer tube and the outer peripheral surface 20b of the tube 20. In the step (A) of FIG. 4, no external force is applied to the outer peripheral surface 20b of the tube 20, so no wrinkles are generated, but in the step (D) of FIG. Since the wrinkling action of forcibly compressing after inflating was performed, the outer peripheral surface 20b of the tube 20 in the insertion space 13 had fine wrinkles, or even if there were no wrinkles, the surface was fine. It is in an unstable pressure state where wrinkles are about to come. When the tool horn 30 is ultrasonically vibrated as in the step (E) of FIG. 4 while the outer peripheral surface 20 b of the tube 20 is pressed and the wrinkling operation is performed in an unstable pressed state, The outer peripheral surface 20b and the inner wall 11a of the outer tube are melted and welded to each other. Then, a predetermined connection strength between the tube 20 and the resin molded product 10B can be obtained.

このことは、高い圧力で押し固めた可撓性チューブは、既に固いチューブと同等になっていると考えれば、工具ホーン３０を超音波振動させると、外管内壁１１ａとチューブ２０の外周面２０ｂが溶けて互いに入り込んだ形で溶着することが理解できる。
図１９、２０の従来例では、超音波振動で溶融、固化させた離脱防止部１５ａをチューブ２０の外周面に食い込ませた形で絞め付け、抜けないようにしていたが、実施形態１では、チューブ２０を挿入用空間１３に入れ、挿入用空間１３内にチューブを加圧した状態で超音波振動を加え、外管内壁１１ａとチューブ外周面２０ｂが溶けて入り込んだ形で溶着している。このことにより、本発明は、段差のないチューブと樹脂成形品との接続について、外管内壁１１ａとチューブ外周面２０ｂが互いに溶けて入り込んだ形で溶着して大きい接続強度を得ている。 This means that if the flexible tube pressed with a high pressure is already equivalent to a rigid tube, when the tool horn 30 is ultrasonically vibrated, the outer tube inner wall 11a and the outer peripheral surface 20b of the tube 20 are oscillated. It can be understood that the two are melted and welded together.
In the conventional example shown in FIGS. 19 and 20, the separation prevention portion 15a melted and solidified by ultrasonic vibration is squeezed in a form that bites into the outer peripheral surface of the tube 20 to prevent the separation, but in the first embodiment, The tube 20 is placed in the insertion space 13, ultrasonic vibration is applied to the insertion space 13 while the tube is pressurized, and the outer tube inner wall 11a and the tube outer peripheral surface 20b are melted and welded together. As a result, according to the present invention, the outer tube inner wall 11a and the tube outer peripheral surface 20b are fused and welded to each other in connection with the stepless tube and the resin molded product to obtain a large connection strength.

図５に、実施形態１の溶着する作業手順をフローチャートで示した。まず、ベース台８０に軸継手１０Ｂを取り付ける（ステップＳ１）。次に、チューブ２０を、挿入用空間１３に入れる（ステップＳ２）。チューブ２０を軸方向に押し込み、チューブ２０の圧力で外管１１を膨らませる（ステップＳ３）。可撓性チューブの先端と外管を膨張させた状態から、工具ホーン３０とアンビル４０で膨張した外管外壁１１ｂを元の形に押し戻す（ステップＳ４）。工具ホーン３０を超音波振動させ、外管内壁１１ａとチューブ２０の外周面を溶着する（ステップＳ５）。工具ホーン３０とアンビル４０、を外管外壁１１ｂから離す（ステップＳ６）。 FIG. 5 is a flowchart showing the welding procedure of the first embodiment. First, the shaft coupling 10B is attached to the base 80 (step S1). Next, the tube 20 is put into the insertion space 13 (step S2). The tube 20 is pushed in the axial direction, and the outer tube 11 is inflated by the pressure of the tube 20 (step S3). From the expanded state of the tip of the flexible tube and the outer tube, the outer wall 11b of the outer tube expanded by the tool horn 30 and the anvil 40 is pushed back to its original shape (step S4). The tool horn 30 is ultrasonically vibrated to weld the outer tube inner wall 11a and the outer peripheral surface of the tube 20 (step S5). The tool horn 30 and the anvil 40 are separated from the outer tube outer wall 11b (step S6).

そして、全周が溶着するまで軸継手１０Ｂを、工具ホーン３０とアンビル４０に対して相対的に、所定角度回転させ（ステップＳ７）、ステップＳ４からステップＳ７の手順を繰り返す。全周が溶着したら、ステップＳ６の後にチューブ押し込み部材５０、５１を元の位置に戻す（ステップＳ８）。軸継手１０Ｂをベース台８０から抜く（ステップＳ９）。このことにより、軸継手１０Ｂとチューブ２０の接続作業が完了する（ステップＳ１０）。 Then, the shaft coupling 10B is rotated by a predetermined angle relative to the tool horn 30 and the anvil 40 until the entire circumference is welded (step S7), and the procedure from step S4 to step S7 is repeated. When the entire circumference is welded, the tube pushing members 50 and 51 are returned to their original positions after step S6 (step S8). The shaft coupling 10B is pulled out from the base 80 (step S9). This completes the work of connecting the shaft coupling 10B and the tube 20 (step S10).

以上、本発明が（１）外管１１と内管１２の間に挿入用空間１３を形成した軸継手１０Ｂなどの樹脂成形品に、挿入用空間１３内にチューブ２０を圧接した状態で直接一体に接続することを説明した。
特に（２）工具ホーンの中心の孔にチューブを通す作業と外す作業を不要としている。（３）外管内壁１１ａとチューブ２０の外周面を溶着して離脱防止効果を高める。という従来技術では未解決であった課題を解決する新たな溶着方法および装置を実現していることを説明した。 As described above, the present invention is (1) directly integrated with a resin molded article such as a shaft coupling 10B in which the insertion space 13 is formed between the outer pipe 11 and the inner pipe 12 in a state in which the tube 20 is pressed into the insertion space 13. Connected to.
In particular, (2) the work of inserting and removing the tube in the center hole of the tool horn is unnecessary. (3) The outer tube inner wall 11a and the outer peripheral surface of the tube 20 are welded together to enhance the effect of preventing separation. It has been described that a new welding method and apparatus for solving the problems that have not been solved by the conventional technology are realized.

なお、本発明は、「工具ホーンにチューブを通さないで、点滴筒の外管内壁と可撓性チューブを、シワができるほど加圧した状態で溶着する発明」ということができる。
以上、実施形態１では、外管１１と内管１２の間に挿入用空間１３を形成した樹脂成形品１０を支持するベース台８０と、可撓性チューブ２０を把持して、ベース台８０に支持した樹脂成形品１０の挿入用空間１３に当該可撓性チューブ２０の先端を押し込み、当該可撓性チューブ２０の先端と外管１１を半径方向に膨張させる押し込み手段５０、５１と、樹脂成形品１０の外管外壁１１ｂの一面側に当接する工具ホーン３０と、樹脂成形品１０の外管外壁１１ｂの工具ホーン３０と反対の他面側に当接するアンビル４０と、樹脂成形品１０の外管外壁１１ｂを工具ホーン３０とアンビル４０で押圧して、半径方向に膨張した外管１１と可撓性チューブ２０を押し戻す押し戻し手段（バネ３３、４３とエアシリンダー３２、４４）、工具ホーン３０を超音波振動させる超音波振動手段３２と、樹脂成形品１０を可撓性チューブ２０先端の軸芯の周りに所定角度回転させる回転手段（支持キャップ）７１と、押し込み手段５０、５１と、押し戻し手段（バネ３３、４３とエアシリンダー３２、４４）と、超音波振動手段３２と、回転手段７１と、を制御する図示しない制御手段と、を用いて当該制御手段に、
（１）押し込み手段５０、５１により、ベース台８０に支持した樹脂成形品１０の挿入用空間１３に可撓性チューブ２０の先端を押し込み、当該可撓性チューブ２０の先端と外管１１を半径方向に膨張させ、
（２）可撓性チューブの先端と外管を膨張させた状態から、押し戻し手段により、樹脂成形品１０の外管外壁１１ｂを工具ホーン３０とアンビル４０で押圧して、半径方向に膨張した外管１１と可撓性チューブ２０を押し戻し、
（３）超音波振動手段３２により、工具ホーン３０を超音波振動させ、樹脂成形品１０の外管内壁１１ａと可撓性チューブ２０の外周面を加圧した状態で溶着し、
（４）前記押し戻し手段により、工具ホーン３０とアンビル４を樹脂成形品１０から離し、
（５）回転手段７１により、前記工具ホーンと前記アンビルに対して樹脂成形品１０を可撓性チューブ２０先端の軸芯の周りに所定角度、相対的に回転させ、
（６）上記（２）から（５）を所定回数繰り返し、
（７）押し戻し手段により、工具ホーン３０とアンビル４を樹脂成形品１０から離すとともに、押し込み手段５０、５１を樹脂成形品１０から離し、ベース台８０から樹脂成形品１０を取り出せるようにする、
工程を実行することにより、可撓性チューブ２０を、樹脂成形品１０に設けた外管１１と内管１２の間の挿入用空間１３に一体接続するようにした、可撓性チューブ２０と樹脂成形品１０の超音波振動溶着方法と装置について説明した。 The present invention can be said to be an "invention in which the outer tube inner wall of the drip tube and the flexible tube are welded to each other in a state of being pressed so as to cause wrinkles without passing the tube through the tool horn."
As described above, in the first embodiment, the base table 80 that supports the resin molded product 10 in which the insertion space 13 is formed between the outer tube 11 and the inner tube 12 and the flexible tube 20 are gripped to form the base table 80. Pushing means 50, 51 for pushing the tip of the flexible tube 20 into the space 13 for insertion of the supported resin molded article 10 to radially expand the tip of the flexible tube 20 and the outer tube 11, and resin molding. Of the outer pipe outer wall 11b of the product 10, the tool horn 30 abutting on one side of the outer pipe outer wall 11b, the anvil 40 contacting the other side of the outer pipe outer wall 11b of the resin molded product 10 opposite to the tool horn 30, The outer wall 11b is pressed by the tool horn 30 and the anvil 40 to push back the radially expanded outer tube 11 and the flexible tube 20 (springs 33 and 43 and air cylinders 32 and 44), and the tool horn 30. Ultrasonic vibrating means 32 for ultrasonically vibrating, rotating means (supporting cap) 71 for rotating the resin molded product 10 around the axis of the tip of the flexible tube 20 by a predetermined angle, pushing means 50, 51, and pushing back means. (Springs 33 and 43 and air cylinders 32 and 44), ultrasonic vibrating means 32, and rotating means 71 are not shown.
(1) By pushing means 50 and 51, the tip of the flexible tube 20 is pushed into the insertion space 13 of the resin molded product 10 supported by the base 80, and the tip of the flexible tube 20 and the outer tube 11 are radiused. Inflates in the direction
(2) From the expanded state of the tip of the flexible tube and the outer tube, the outer tube outer wall 11b of the resin molded product 10 is pressed by the tool horn 30 and the anvil 40 by the push-back means to expand in the radial direction. Push back the tube 11 and flexible tube 20,
(3) The tool horn 30 is ultrasonically vibrated by the ultrasonic vibrating means 32, and the outer tube inner wall 11a of the resin molded product 10 and the outer peripheral surface of the flexible tube 20 are welded under pressure.
(4) The push-back means separates the tool horn 30 and the anvil 4 from the resin molded product 10,
(5) The rotating means 71 causes the resin molded product 10 to rotate relative to the tool horn and the anvil about the axial center of the distal end of the flexible tube 20 by a predetermined angle.
(6) The above (2) to (5) are repeated a predetermined number of times,
(7) By the pushing back means, the tool horn 30 and the anvil 4 are separated from the resin molded product 10, and the pushing means 50, 51 are separated from the resin molded product 10 so that the resin molded product 10 can be taken out from the base 80.
By performing the process, the flexible tube 20 is integrally connected to the insertion space 13 between the outer tube 11 and the inner tube 12 provided in the resin molded product 10, and the flexible tube 20 and the resin are formed. The ultrasonic vibration welding method and apparatus for the molded product 10 have been described.

（実施形態１の第１変形例）
実施形態１を説明した上記図４の工程（Ｃ）では、外管１１が「お椀状」に膨張、変形している様子を示したが、外管１１の肉厚と軸方向の長さによっては、外管１１が挿入用空間底部から「逆円錐状」に広がるように膨張、変形する場合もある。
そのような場合を、実施形態１の第１変形例として、図６に工程（Ａ）から（Ｆ）として図示した。図６の工程（Ａ）の状態から、図６の工程（Ｂ）のようにチューブ２０を挿入用空間１３に入れ、図６の工程（Ｃ）のようにチューブ２０を挿入用空間底部（外管底壁１１ｃ）に向けて押し込むと、外管１１が挿入用空間底部から逆円錐状に広がるように変形する。しかし、図６の工程（Ｄ）のように、外管外壁１１ｂから工具ホーン３０とアンビル４０が外管外壁１１ｂに当たり、外管１１の挿入用空間底部から逆円錐状に広がった変形を押し戻す。図６の工程（Ｄ）の状態は、ほぼ図４の工程（Ｄ）の状態と同じといえる。その後、図６の工程（Ｅ）のように、工具ホーン３０を超音波振動させれば、挿入用空間１３にチューブ２０を圧接した状態で、外管内壁１１ａとチューブ２０の外周面は溶着する。 (First Modification of First Embodiment)
In the step (C) of FIG. 4 for explaining the first embodiment, the outer tube 11 is shown to be expanded and deformed into a “bowl shape”. However, depending on the thickness of the outer tube 11 and the axial length thereof, May expand and deform so that the outer tube 11 spreads from the bottom of the insertion space in an "inverted conical shape".
Such a case is illustrated as steps (A) to (F) in FIG. 6 as a first modification of the first embodiment. From the state of the step (A) of FIG. 6, the tube 20 is put into the insertion space 13 as in the step (B) of FIG. 6, and the tube 20 is inserted into the insertion space bottom (outside) as in the step (C) of FIG. When pushed toward the tube bottom wall 11c), the outer tube 11 is deformed so as to spread from the insertion space bottom to an inverted conical shape. However, as in step (D) of FIG. 6, the tool horn 30 and the anvil 40 hit the outer pipe outer wall 11b against the outer pipe outer wall 11b, and push back the deformation that spreads in an inverted conical shape from the insertion space bottom of the outer pipe 11. It can be said that the state of the step (D) of FIG. 6 is almost the same as the state of the step (D) of FIG. Then, as in step (E) of FIG. 6, when the tool horn 30 is ultrasonically vibrated, the outer tube inner wall 11a and the outer peripheral surface of the tube 20 are welded while the tube 20 is pressed against the insertion space 13. ..

なお、図示していないが、図６の工程（Ｅ）の次に、工具ホーン３０とアンビル４０を図６の工程（Ｃ）のように外管外壁１１ｂから離し、チューブ２０と外管内壁１１ａの全周が溶着するまで、工具ホーン３０とアンビル４０に対して相対的に、所定角度回転させ、再び図６の工程（Ｄ）の押し戻し動作と、図６の工程（Ｅ）の超音波振動溶着動作をする。そして、外管１１とチューブ２０は直接一体に接続する。このことは、実施形態１と同じである。
（実施形態１の第２変形例）
実施形態１の第２変形例では、図７の工程（Ａ）、（Ｂ）のように、工具ホーン３０とアンビル４０の押圧面を円錐面として、外管１１Ｂの外径寸法が、外管底壁１１ｃから軸方向に離れるにつれてテーパー状に細くなるようにしている。 Although not shown, after the step (E) of FIG. 6, the tool horn 30 and the anvil 40 are separated from the outer tube outer wall 11b as in the step (C) of FIG. 6, and the tube 20 and the outer tube inner wall 11a are separated. Until the entire circumference is welded, the tool horn 30 and the anvil 40 are rotated by a predetermined angle relative to each other, and the pushing-back operation of the step (D) of FIG. 6 and the ultrasonic vibration of the step (E) of FIG. 6 are performed again. Performs welding operation. Then, the outer tube 11 and the tube 20 are directly connected integrally. This is the same as the first embodiment.
(Second Modification of First Embodiment)
In the second modified example of the first embodiment, as in steps (A) and (B) of FIG. 7, the pressing surface of the tool horn 30 and the anvil 40 is a conical surface, and the outer diameter dimension of the outer tube 11B is the outer tube. The distance from the bottom wall 11c in the axial direction is tapered.

そのため、実施形態１の第２変形例で外管１１Ｂに超音波振動を加えると、挿入用空間１３にチューブ２０を圧接した状態で、外管内壁１１ａとチューブ２０が溶着するとともに、外管底壁１１ｃから軸方向に離れるにつれて外径寸法とともに内径寸法が小さくなるように外管１１Ｂがチューブ２０の外周面２０ｂを絞っている。そして、チューブ２０を外管内壁１１ａで強固に把持されて、樹脂成形品の挿入用空間１３から抜けないようにしている。
（実施形態１の第３変形例）
実施形態１の第３変形例では、図８の工程（Ａ）、（Ｂ）のように、工具ホーン３０の押圧面を、断面で見て内側に凸の曲面として、樹脂成形品のチューブ収納用の外管１１Ｃの中央部の内径を小さく絞っている。 Therefore, when ultrasonic vibration is applied to the outer tube 11B in the second modified example of the first embodiment, the outer tube inner wall 11a and the tube 20 are welded while the tube 20 is pressed against the insertion space 13, and the outer tube bottom is also welded. The outer tube 11B squeezes the outer peripheral surface 20b of the tube 20 so that the inner diameter as well as the outer diameter becomes smaller with increasing distance from the wall 11c in the axial direction. The tube 20 is firmly gripped by the inner wall 11a of the outer tube so as not to come off from the space 13 for inserting the resin molded product.
(Third Modification of First Embodiment)
In the third modified example of the first embodiment, as in steps (A) and (B) of FIG. 8, the pressing surface of the tool horn 30 is a curved surface that is convex inward when viewed in cross section, and a resin-molded product is housed in a tube. The inner diameter of the central portion of the outer tube 11C for use is narrowed down.

そのため、実施形態１の第３変形例で外管１１Ｃに超音波振動を加えると、挿入用空間１３にチューブ２０を圧接した状態で、外管内壁１１ａとチューブ２０が溶着するとともに、チューブ２０は絞られた外管１１Ｃの中央部で強固に把持されて、抜けないようにしている。
（実施形態１の第４の変形例）
実施形態１の第４の変形例では、軟質のチューブ本体２１ｂの外周にチューブ本体２１ｂより硬い外皮２１ｃを被せた形の、硬度的に二重構造をしたチューブ２１を用いた場合を説明する。 Therefore, when ultrasonic vibration is applied to the outer tube 11C in the third modified example of the first embodiment, the outer tube inner wall 11a and the tube 20 are welded while the tube 20 is pressed against the insertion space 13, and the tube 20 is The squeezed outer tube 11C is firmly gripped by the central part of the outer tube 11C so as not to come off.
(Fourth Modification of First Embodiment)
In the fourth modified example of the first embodiment, a case will be described in which a tube 21 having a double structure in terms of hardness is used in which the outer circumference of a soft tube body 21b is covered with a skin 21c that is harder than the tube body 21b.

実施形態１の第４の変形例では、チューブ２１を樹脂成形品のチューブ収納用の挿入用空間１３に入れ、挿入用空間１３にチューブ２１を軸方向に加圧して、チューブ２１の外周面、特に外皮２１ｃにシワを発生させた状態で、外管１１に工具ホーン３０を押圧して超音波振動溶着する。
図９の工程（Ａ）では、チューブ２１の構造を、軟質のチューブ本体２１ｂの外周にチューブ本体より硬い外皮２１ｃを被せた形にしている。図９の工程（Ｂ）のように、チューブ２１をチューブ収納用の挿入用空間１３にいれて、チューブ２１を圧縮していくと、軟質のチューブ本体２１ｂは圧縮され、硬い外皮２１ｃにはシワが発生する。図９の工程（Ｃ）のように、チューブ２１も外管１１も軸方向に圧縮され、同時に半径方向に膨張する。ここで、図９の工程（Ｄ）のように、工具ホーン３０とアンビル４０でチューブ２１と外管１１の膨張した部分を圧縮する。このチューブ２１と外管１１の膨張した分を再圧縮するシワ寄せ動作をした不安定な加圧状態のまま、外管１１に工具ホーン３０の超音波振動を与えると、外管内壁１１ａとチューブ２０の外周面が溶けて入り込んだ形で溶着することができる。 In the fourth modified example of the first embodiment, the tube 21 is put into the insertion space 13 for storing the resin molded product, and the tube 21 is axially pressed into the insertion space 13 so that the outer peripheral surface of the tube 21. In particular, with the outer skin 21c having wrinkles, the tool horn 30 is pressed against the outer tube 11 to perform ultrasonic vibration welding.
In step (A) of FIG. 9, the structure of the tube 21 is such that the outer circumference of a soft tube body 21b is covered with an outer skin 21c that is harder than the tube body. As shown in step (B) of FIG. 9, when the tube 21 is put into the insertion space 13 for storing the tube and the tube 21 is compressed, the soft tube body 21b is compressed and the hard outer skin 21c is wrinkled. Occurs. As in the step (C) of FIG. 9, both the tube 21 and the outer tube 11 are compressed in the axial direction and simultaneously expanded in the radial direction. Here, as in step (D) of FIG. 9, the expanded portion of the tube 21 and the outer tube 11 is compressed by the tool horn 30 and the anvil 40. When ultrasonic vibration of the tool horn 30 is applied to the outer tube 11 in the unstable pressurizing state in which a wrinkling operation is performed to re-compress the expanded amount of the tube 21 and the outer tube 11, the outer tube inner wall 11a and the tube are The outer peripheral surface of 20 can be melted and welded.

実施形態１の第４の変形例では、軟質のチューブ本体２１ｂの外周にチューブ本体より硬い外皮２１ｃを被せたチューブ２１を用いて超音波振動溶着することで、微細なシワや段差をつくり、チューブと樹脂成形品が溶けて互いに入り込んだ形でチューブ２１と樹脂成形品が溶着し、所定の接続強度が得られる。このように、実施形態１では、外管内壁１１ａと段差のないチューブ２１の外周面を溶着している。 In the fourth modification of the first embodiment, ultrasonic vibration welding is performed using the tube 21 in which the outer circumference of the soft tube body 21b is covered with the outer cover 21c that is harder than the tube body, thereby forming fine wrinkles and steps, and The resin molded product is melted and the resin molded product melts into each other, and the tube 21 and the resin molded product are welded to each other, so that a predetermined connection strength is obtained. As described above, in the first embodiment, the outer peripheral surface of the tube 21 having no step is welded to the inner wall 11a of the outer tube.

なお、実施形態１の第２変形例から第４変形例の説明では、ベース台８０の図示を省略して説明した。また、押し込み部材５０、５１は、内面にギザギザのある円筒部材として図示したが、チューブを把持して軸方向に押し込むことができればよく、場合によっては人間が手でチューブを把持して軸方向に押し込むようにしても良い。
以上、実施形態１で説明したように、チューブ２０、２１を挿入用空間１３の軸方向に加圧しチューブ２０、２１の先端部分を軸方向に圧縮し半径方向に膨張させる。そして、可撓性チューブの先端と外管を膨張させた状態から、外管外壁１１ｂを工具ホーン３０とアンビル４０で押圧し、半径方向に膨張した部分に所定の大きさの加圧力を加えて圧縮すると、チューブ２０、２１の外周に環状のシワが生じる。この環状のシワが生じた状態で、工具ホーン３０を超音波振動させ、外管内壁１１ａとチューブ２０、２１の表面を超音波振動溶着すると、チューブ２０、２１のシワに外管内壁１１ａが溶け込み、樹脂成形品の軸方向にチューブが抜けなくなる。 In the description of the second modification to the fourth modification of the first embodiment, the illustration of the base 80 is omitted. Further, the pushing members 50 and 51 are illustrated as a cylindrical member having a knurled inner surface, but it is sufficient that the pushing members 50 and 51 can hold the tube and push it in the axial direction. You may push it in.
As described above, as described in the first embodiment, the tubes 20 and 21 are pressed in the axial direction of the insertion space 13 to compress the tip portions of the tubes 20 and 21 in the axial direction and expand in the radial direction. Then, the outer tube outer wall 11b is pressed by the tool horn 30 and the anvil 40 from the expanded state of the tip of the flexible tube and the outer tube, and a predetermined amount of pressure is applied to the radially expanded portion. When compressed, annular wrinkles are formed on the outer circumference of the tubes 20 and 21. When the tool horn 30 is ultrasonically vibrated and the surfaces of the outer tube inner wall 11a and the tubes 20 and 21 are ultrasonically vibrated and welded in the state where the annular wrinkles are generated, the outer tube inner wall 11a is melted into the wrinkles of the tubes 20 and 21. , The tube does not come off in the axial direction of the resin molded product.

あるいはシワがよっていなくても表面に微細なシワが寄ろうとしている不安定な状態になっている。このチューブの外周面を加圧してシワ寄せ動作をした不安定な加圧状態としたまま、工具ホーン３０に超音波振動させると、外管内壁１１ａとチューブ２０、２１の外周面が溶けて互いに入り込んだ形で溶着する。そして、チューブと樹脂成形品に所定の接続強度が得られる。 Or even if there are no wrinkles, the surface is in an unstable state where fine wrinkles are about to come. When the tool horn 30 is ultrasonically vibrated while pressurizing the outer peripheral surface of the tube and performing the wrinkling operation, the inner wall 11a of the outer tube and the outer peripheral surfaces of the tubes 20 and 21 are melted to each other. Welds in a clogged form. Then, a predetermined connection strength can be obtained between the tube and the resin molded product.

また、図７、８で説明したように、工具ホーン３０とアンビル４０の押圧面の形状を円錐状の断面形状にしたり、内側に凸の断面形状にしたりして、外管の外壁１１Ｂ、１１Ｃをより圧縮した形に成形すると、圧縮した分だけ樹脂成形品の軸方向にチューブ２０、２１の離脱防止力が増大する。
（実施形態２） Further, as described with reference to FIGS. 7 and 8, the pressing surfaces of the tool horn 30 and the anvil 40 have a conical sectional shape or an inwardly convex sectional shape so that the outer walls 11B and 11C of the outer pipe are formed. When is molded into a more compressed form, the force for preventing the tubes 20 and 21 from separating in the axial direction of the resin molded product increases by the amount of compression.
(Embodiment 2)

実施形態２では、外周面に段差のあるチューブ、すなわち外周の軸方向に波を打つ段差があるチューブ２２と、外管１１と、外管１１内に同軸方向に配置された内管１２が備えられ、外管１１と内管１２間に挿入用空間１３が形成された樹脂成形品（軸継手１０Ｂ）を溶着するときの実施形態を説明する。
実施形態２では、図２３で示したような、あらかじめ外周面に段差のあるチューブ、すなわち外周の軸方向に波を打つ段差のあるチューブ２２を作っておいて、図１０の工程（Ａ）に示すように、ベース台８０に支持した軸継手１０Ｂの内管１２にチューブ２２を被せ、図１０の工程（Ｂ）に示すようにチューブ押し込み部材５０、５１を用いて、チューブ２２の外周を掴んで、チューブ２２の先端を挿入用空間１３に入れ、軸方向の下方に押し込んでいくと、チューブ２２の先端は挿入用空間底壁（外管底壁１１ｃ）に当たる。その後は、実施形態１と同じ方法、手順で超音波振動溶着をする。 In the second embodiment, a tube having a step on the outer peripheral surface, that is, a tube 22 having a step that corrugates in the axial direction of the outer circumference, an outer tube 11, and an inner tube 12 arranged coaxially in the outer tube 11 are provided. An embodiment will be described in which a resin molded product (shaft coupling 10B) having an insertion space 13 formed between the outer pipe 11 and the inner pipe 12 is welded.
In the second embodiment, as shown in FIG. 23, a tube having a step on the outer peripheral surface, that is, a tube 22 having a step undulating in the axial direction of the outer circumference is made in advance, and the step (A) of FIG. 10 is performed. As shown, the tube 22 is covered on the inner tube 12 of the shaft coupling 10B supported by the base 80, and the outer circumference of the tube 22 is grasped by using the tube pushing members 50 and 51 as shown in the step (B) of FIG. Then, when the tip of the tube 22 is put into the insertion space 13 and pushed downward in the axial direction, the tip of the tube 22 hits the insertion space bottom wall (outer tube bottom wall 11c). After that, ultrasonic vibration welding is performed by the same method and procedure as in the first embodiment.

すなわち、図１０の工程（Ｃ）に示すように、チューブ２２をチューブ押し込み部材５０、５１で掴んだまま、チューブ２２の先端を挿入用空間１３に入れ、軸方向に加圧すると、チューブ２２は半径方向に膨張し、外管１１も半径方向に膨張する。チューブ２２の半径方向の膨張は、チューブの先端部分２２ａが外管底壁１１ｃに当たって、挿入用空間１３に充満して生じる。そして、外管底壁１１ｃより上方に向けて徐々に半径寸法が拡大する。図１０の工程（Ｃ）では、外管１１がお椀状に膨張している様子を示している。 That is, as shown in step (C) of FIG. 10, when the tip of the tube 22 is put into the insertion space 13 while the tube 22 is held by the tube pushing members 50 and 51, and the tube 22 is axially pressurized, It expands in the radial direction, and the outer tube 11 also expands in the radial direction. The expansion of the tube 22 in the radial direction occurs when the distal end portion 22a of the tube hits the outer tube bottom wall 11c and fills the insertion space 13. Then, the radial dimension gradually increases upward from the outer tube bottom wall 11c. In the step (C) of FIG. 10, the outer tube 11 is inflated like a bowl.

外管１１が半径方向に膨張した状態で、図１０の工程（Ｄ）に示すように、外管外壁１１ｂを工具ホーン３０とアンビル４０で挟んで押圧する。そして、工具ホーン３０とアンビル４０で外管１１の半径方向の膨張を押さえ込む。このことにより、外管外壁１１ｂは膨らんだ曲面から、膨張していた部分が押さえ込まれた元の円筒面に戻る。このとき、チューブ２２も外管１１によって半径方向に圧縮される。 With the outer tube 11 expanded in the radial direction, the outer tube outer wall 11b is sandwiched between the tool horn 30 and the anvil 40 and pressed as shown in step (D) of FIG. Then, the tool horn 30 and the anvil 40 suppress the expansion of the outer tube 11 in the radial direction. As a result, the outer tube outer wall 11b returns from the bulging curved surface to the original cylindrical surface where the expanded portion is pressed. At this time, the tube 22 is also radially compressed by the outer tube 11.

お椀状に膨張した表面を円筒状の表面にすることは、外管外壁１１ｂの表面積を小さくすることであり、表面の各微小部分が均等に縮まない所にはシワが発生する。この外管外壁１１ｂの膨らんだ表面を元の円筒面に戻す動作は、外管内壁１１ａとチューブ２２の外周面２２ｂにシワを寄せる、シワ寄せ動作をさせていることになる。
外管１１の肉厚と軸方向の長さにより、外管１１は「お椀状」、「逆円錐状」の他に、例えば「太鼓状」に膨張することも考えられるが、その場合でも、図１０の工程（Ｄ）に示すように、外管外壁１１ｂを工具ホーン３０とアンビル４０で挟んで押圧する。そして、工具ホーン３０とアンビル４０で外管１１の半径方向の膨張を押さえ込む。このことにより、外管外壁１１ｂは膨らんだ曲面から、膨張していた部分が押さえ込まれた元の円筒面に戻る。このとき、チューブ２２も外管１１によって半径方向に圧縮されることは同じである。 Making the bowl-shaped expanded surface a cylindrical surface reduces the surface area of the outer tube outer wall 11b, and wrinkles occur where the minute portions of the surface do not shrink uniformly. The operation of returning the bulged surface of the outer pipe outer wall 11b to the original cylindrical surface is a wrinkling operation of wrinkling the outer pipe inner wall 11a and the outer peripheral surface 22b of the tube 22.
Depending on the wall thickness and the axial length of the outer tube 11, the outer tube 11 may expand into, for example, a “taiko” shape in addition to the “bowl shape” and the “reverse cone shape”, but even in that case, As shown in step (D) of FIG. 10, the outer tube outer wall 11b is sandwiched between the tool horn 30 and the anvil 40 and pressed. Then, the tool horn 30 and the anvil 40 suppress the expansion of the outer tube 11 in the radial direction. As a result, the outer tube outer wall 11b returns from the bulging curved surface to the original cylindrical surface where the expanded portion is pressed. At this time, the tube 22 is also compressed by the outer tube 11 in the radial direction.

図１０の工程（Ａ）では、チューブ２２の外周面に外力がかかっていない自由状態であるが、図１０の工程（Ｄ）では、チューブ２２の外周面２２ｂを一度膨らませた後、強制的に圧縮するシワ寄せ動作をしたので、挿入用空間１３の中にあるチューブ２２の外周面２２ｂは、図１０の工程（Ａ）に示す状態より外周の軸方向に波を打つ段差が大きくなり、表面に微細なシワがよった、あるいはシワがよっていなくても表面に微細なシワが寄ろうとしている不安定な状態になっている。 In the step (A) of FIG. 10, the outer peripheral surface of the tube 22 is in a free state in which an external force is not applied, but in the step (D) of FIG. 10, the outer peripheral surface 22b of the tube 22 is once inflated and then forced. Since the wrinkling action of compressing is performed, the outer peripheral surface 22b of the tube 22 in the insertion space 13 has a larger step difference in the axial direction of the outer periphery than the state shown in the step (A) of FIG. It is in an unstable state where there are fine wrinkles on the surface, or even if there are no wrinkles, fine wrinkles tend to come to the surface.

このチューブ２２の外周面を加圧してシワ寄せ動作をした不安定な加圧状態としたまま、図１０の工程（Ｅ）に示すように、工具ホーン３０を超音波振動させると、外管内壁１１ａとチューブ２２の外周面が溶けて互いに入り込んだ形で溶着する。そして、チューブ２２と軸継手１０Ｂの所定の接続強度が得られる。
なお、図示していないが、図１０の工程（Ｅ）の次に、工具ホーン３０とアンビル４０を図１０の工程（Ｃ）のように外管外壁１１ｂから離し、チューブ２２と外管内壁１１ａの全周が溶着するまで、工具ホーン３０とアンビル４０に対して相対的に、所定角度回転させ、再び図１０の工程（Ｄ）の押し戻し動作と、図１０の工程（Ｅ）の超音波振動溶着動作をする。そして、外管１１とチューブ２２は直接一体に接続する。このことは、実施形態１と同じである。 When the tool horn 30 is ultrasonically vibrated as shown in step (E) of FIG. 10 while the outer peripheral surface of the tube 22 is pressed to perform the wrinkling operation, the inner wall of the outer tube is The outer peripheral surfaces of the tube 11a and the tube 22 are melted and welded to each other. Then, a predetermined connection strength between the tube 22 and the shaft coupling 10B is obtained.
Although not shown, after the step (E) of FIG. 10, the tool horn 30 and the anvil 40 are separated from the outer tube outer wall 11b as in the step (C) of FIG. 10, and the tube 22 and the outer tube inner wall 11a are separated. Until the entire circumference is welded, the tool horn 30 and the anvil 40 are rotated by a predetermined angle relative to each other, and the pushing back operation of the step (D) of FIG. 10 is performed again and the ultrasonic vibration of the step (E) of FIG. Performs welding operation. Then, the outer tube 11 and the tube 22 are directly connected integrally. This is the same as the first embodiment.

このように、実施形態２では、あらかじめ外周面に段差のあるチューブ２２を挿入用空間１３に入れて加圧した状態で、実施形態１と同じく、シワ寄せ動作をすることにより、加圧も、シワ寄せ動作もしない場合に比べて接合強度を著しく高めることができる。
本発明の実施形態２では、上記説明したとおり、従来例と違った方法で、外周面に段差のあるチューブと樹脂成形品との接続について、外管内壁１１ａとチューブ２２の外周面２２ｂが互いに溶けて入り込んだ形で溶着して大きい接続強度を得ている。
（実施形態２の第１変形例）
実施形態２の第１変形例では、あらかじめチューブ２２Ａの先端部分の一定長さ部分に外溝Ｗｏと内溝Ｗｉを作っておいて、既にできた溝Ｗｏ、Ｗｉのあるチューブ２２Ａの先端部分を挿入用空間１３に入れ、チューブ２２Ａの先端部分が圧縮され、溝Ｗｏの山頂部分が外管内壁１１ａを押圧するまで入れた加圧状態で、外管外壁１１ｂに工具ホーン３０を押圧して超音波振動溶着するようにしている。 As described above, in the second embodiment, the tube 22 having a step on the outer peripheral surface is put in the insertion space 13 in advance and pressurized, and the wrinkling operation is performed as in the first embodiment. The joining strength can be remarkably increased as compared with the case where no wrinkling operation is performed.
In the second embodiment of the present invention, as described above, the outer tube inner wall 11a and the outer peripheral surface 22b of the tube 22 are connected to each other in connection with the tube having a step on the outer peripheral surface and the resin molded product by a method different from the conventional example. Welded in a melted and intruded form to obtain high connection strength.
(First Modification of Second Embodiment)
In the first modified example of the second embodiment, the outer groove W o and the inner groove W i are previously formed in a fixed length portion of the tip end portion of the tube 22A, and the tube 22A having already formed grooves W o, W i is formed. put the tip portion of the inserting space 13, the distal end portion of the tube 22A is compressed, in a pressurized state to put to the summit portion of the groove W o presses the outer tube wall 11a, the tool horn 30 to the outer tube outer wall 11b Is pressed for ultrasonic vibration welding.

あらかじめチューブ２２Ａの先端部分に溝を作っておく方法としては、チューブ２２Ａの外周面、内周面に機械加工で溝を掘る方法、チューブ２２Ａの外周面、内周面に高温に熱した溝付き棒をいれて、高温にしたチューブ２２Ａに溝を転造する方法など任意の方法を採用することができる。
図１１の工程（Ａ）に示すように、あらかじめの先端部分に溝Ｗｏ、Ｗｉを作っておいたチューブ２２Ａを挿入用空間１３に入れ、図１１の工程（Ｂ）、工程（Ｃ）のように軸方向に加圧すると、チューブ２２Ａを軸方向に圧縮し、半径方向に膨張させる。溝Ｗｏの山頂部分が外管内壁１１ａを押圧し、溝Ｗｉの山頂部分が内管外壁１２ｂを押圧した状態で、図１２の工程（Ｄ）に示すように工具ホーン３０とアンビル４０で押圧して半径方向の膨張した部分を再び圧縮する。そして、図１２の工程（Ｅ）のように、工具ホーン３０を超音波振動させると、溝Ｗｏとその他のチューブ２２Ａの表面にできる微細なシワに樹脂成形品の外管内壁１１ａが溶け込んだ形にチューブ２２Ａを溶着する。そして、溝Ｗｉとその近傍の表面にできる微細なシワに樹脂成形品１０Ｂの内管外壁１２ｂが溶け込んだ形にチューブ２２Ａを溶着することができる。 As a method of forming a groove on the tip portion of the tube 22A in advance, a method of digging a groove on the outer peripheral surface and the inner peripheral surface of the tube 22A by machining, an outer peripheral surface and an inner peripheral surface of the tube 22A with a groove heated to high temperature An arbitrary method such as a method of inserting a rod and rolling a groove in the tube 22A heated to a high temperature can be adopted.
As shown in the step (A) of FIG. 11, the tube 22A having grooves W o and W i formed in advance at the tip portion is put into the insertion space 13, and the steps (B) and (C) of FIG. When the axial pressure is applied as described above, the tube 22A is compressed in the axial direction and expanded in the radial direction. With the crest portion of the groove W o pressing the outer pipe inner wall 11a and the crest portion of the groove W i pressing the inner pipe outer wall 12b, the tool horn 30 and the anvil 40 are used as shown in step (D) of FIG. Press to re-compress the radially expanded portion. Then, when the tool horn 30 is ultrasonically vibrated as in the step (E) of FIG. 12, the outer pipe inner wall 11a of the resin molded product is melted into the fine wrinkles formed on the surface of the groove W o and other tubes 22A. The tube 22A is welded to the shape. Then, the tube 22A can be welded in such a manner that the inner pipe outer wall 12b of the resin molded product 10B is melted into the fine wrinkles formed on the groove Wi and the surface in the vicinity thereof.

このように、実施形態２の第１変形例では、あらかじめ先端部分に溝Ｗｏ、Ｗｉを作っておいたチューブ２２Ａを樹脂成形品の外管内壁１１ａと内管外壁に高い強度で溶着することができる。
図１３は、図１２の工程（Ｅ）における、矢視ＡＬ１３で示す断面図であり、上側の工具ホーン３０と下側のアンビル４０で樹脂成型品１０Ｂの外管１１とチューブ２２Ａを挟んで、工具ホーン３０を超音波振動させている状態（図中符号Ｃで示す）を示している。図１３を見ればわかる様に、樹脂成型品１０Ｂとチューブ２２Ａは、工具ホーン３０のある上側で互いに超音波振動して溶着する。 As described above, in the first modified example of the second embodiment, the tube 22A having the grooves W o and W i formed in the tip portion in advance is welded to the outer pipe inner wall 11a and the inner pipe outer wall of the resin molded product with high strength. be able to.
FIG. 13 is a cross-sectional view taken along line AL13 in the step (E) of FIG. 12, in which the upper tool horn 30 and the lower anvil 40 sandwich the outer tube 11 and the tube 22A of the resin molded product 10B, The state in which the tool horn 30 is ultrasonically vibrated (indicated by reference numeral C in the figure) is shown. As can be seen from FIG. 13, the resin molded product 10B and the tube 22A are ultrasonically vibrated and welded to each other on the upper side of the tool horn 30.

実際の溶着作業としては、一度、図１３に示した状態で超音波振動溶着した後、工具ホーン３０とアンビル４０を離し、樹脂成型品１０Ｂとチューブ２２Ａを上下反転して、（軸回りに回動させて）工具ホーン３０に対して下側にあった溶着すべき部分を上側にして、工具ホーン３０とアンビル４０で外管外壁１１ｂを押して、新たに超音波振動溶着作業を行う。必要により、超音波振動溶着した都度、樹脂成型品１０Ｂとチューブ２２Ａを所望の角度を回転させて、超音波振動溶着作業を行うのは、既に図１から図３を参照して、本発明の超音波振動溶着装置の構造として説明した通りである。図１４は、治具８０から取り出した樹脂成形品とチューブ２２Ａを示している。
（実施形態２の第２の変形例）
実施形態２の第２の変形例では、図１５のように、チューブ２２Ｂの外周にコイル状のばね材９０を巻きつけている。巻き付け円の内径を、チューブ２２Ｂの外径より小さく設定して内径のコイル状のばね材９０をチューブ２２Ｂに巻きつけると、チューブ２２Ｂの外周でコイル状のばね材９０を巻きつけられた部分が凹む。この様な方法で、あらかじめチューブ２２Ｂの先端部分に溝Ｗｏを作っておくことができる。チューブの外径より小さい内径の溝Ｗｏに巻回されるコイル状のばね材９０は、別部品となるが簡単にチューブの先端部分に溝を付けることができる。コイル状のばね材９０をプラスチックのコイルで作れば、外管内壁とチューブを溶着した部分が、外管内壁とプラスチックのコイル９０とチューブ２２Ｂの３部材を溶着した部分に置き換えることが出来るので、より一層接合強度の高い溶着方法が得られる。 As the actual welding work, once ultrasonic vibration welding is performed in the state shown in FIG. 13, the tool horn 30 and the anvil 40 are separated, the resin molded product 10B and the tube 22A are turned upside down, and the The outer part of the outer wall 11b of the tool horn 30 and the anvil 40 is pushed by the tool horn 30 and the anvil 40, and the ultrasonic vibration welding work is newly performed. If necessary, the ultrasonic vibration welding work is performed by rotating the resin molded product 10B and the tube 22A by a desired angle each time the ultrasonic vibration welding is performed, referring to FIGS. This is as described as the structure of the ultrasonic vibration welding device. FIG. 14 shows the resin molded product taken out from the jig 80 and the tube 22A.
(Second Modification of Second Embodiment)
In the second modification of the second embodiment, as shown in FIG. 15, a coiled spring material 90 is wound around the outer circumference of the tube 22B. When the inner diameter of the winding circle is set smaller than the outer diameter of the tube 22B and the coiled spring material 90 having the inner diameter is wound around the tube 22B, the portion around the tube 22B around which the coiled spring material 90 is wound is Dent. By such a method, the groove W o can be formed in the tip portion of the tube 22B in advance. The coil-shaped spring material 90 wound around the groove Wo having an inner diameter smaller than the outer diameter of the tube is a separate component, but the groove can be easily formed in the tip portion of the tube. If the coil-shaped spring material 90 is made of a plastic coil, the portion where the outer pipe inner wall and the tube are welded can be replaced with the portion where the outer pipe inner wall, the plastic coil 90, and the three members of the tube 22B are welded. A welding method with even higher bonding strength can be obtained.

なお、実施形態２の第１変形例と第２変形例の説明では、ベース台８０の図示を省略して説明した。
（実施形態３） In the description of the first modified example and the second modified example of the second embodiment, the illustration of the base 80 is omitted.
(Embodiment 3)

実施形態３では、外管１１の外管内壁１１ａに予め半径方向に段差（螺旋溝）１７を設けることによって、外周面が平滑なチューブ２０と樹脂成形品１０Ｂの接合強度を確保する実施形態を説明する。
実施形態３では、図１６の工程（Ａ）に示したように、あらかじめ外管内壁１１ａに溝１７を刻設しておいて、図１６の工程（Ｂ）に示すように、溝１７のついた挿入用空間１３にチューブ２０を押し込んで、チューブ２０の外周面を外管内壁に設けた溝１７に入り込ませるようにしている。 In the third embodiment, a step (spiral groove) 17 is provided in the outer tube inner wall 11a of the outer tube 11 in the radial direction in advance to secure the bonding strength between the tube 20 having a smooth outer peripheral surface and the resin molded product 10B. explain.
In the third embodiment, as shown in step (A) of FIG. 16, the groove 17 is preliminarily formed on the inner wall 11a of the outer tube, and as shown in step (B) of FIG. The tube 20 is pushed into the insertion space 13 so that the outer peripheral surface of the tube 20 is inserted into the groove 17 provided on the inner wall of the outer tube.

そして図１６の工程（Ｃ）に示すように、チューブ２０を軸方向に加圧して、外管１１の内側表面の溝１７にチューブ２０の外周面を押圧する。そしてこの状態から工具ホーン３０とアンビル４０で圧縮し、工具ホーンで超音波振動を加えると、図１６の工程（Ｄ）のように、溝１７にチューブ２０と外管内壁が溶けて、互いに入り込んだ形に溶着する。
繰り返しになるが、実施形態３では、あらかじめ外管内壁に溝１７を作っておいて、チューブ２０を挿入用空間１３に入れて加圧し、軸方向に圧縮し、半径方向に膨張させた状態で、工具ホーンとアンビルで押圧して半径方向の膨張を再圧縮し、このような状態で、工具ホーンで超音波振動を加えることにより、溝１７に外管内壁を溶け込ませた形でチューブ２０と樹脂成形品を溶着する。そして、所要のチューブと樹脂成形品の接続強度を得ている。 Then, as shown in step (C) of FIG. 16, the tube 20 is axially pressed to press the outer peripheral surface of the tube 20 into the groove 17 on the inner surface of the outer tube 11. When the tool horn 30 and the anvil 40 are compressed from this state and ultrasonic vibration is applied by the tool horn, the tube 20 and the inner wall of the outer tube melt into the groove 17 and enter each other as shown in step (D) of FIG. It is welded in the shape of an ellipse.
Again, in the third embodiment, the groove 17 is previously formed in the inner wall of the outer tube, and the tube 20 is put into the insertion space 13 to be pressurized, axially compressed, and radially expanded. , The radial expansion is recompressed by pressing with the tool horn and the anvil, and ultrasonic vibration is applied by the tool horn in such a state to form the tube 20 with the inner wall of the outer tube melted in the groove 17. Weld resin molded products. Then, the required connection strength between the tube and the resin molded product is obtained.

上記実施形態３では、では、樹脂成形品の外管内壁に予め半径方向に溝１７を設けた場合を説明したが、溝１７の他に、樹脂成形品の外管内壁に予め半径方向に段差、凹凸、その他の形をした溝のいずれかを設けても良い。
なお、以上の各実施形態の説明では、発明を理解しやすくするために、工具ホーンで超音波振動を加えるタイミングは、工具ホーンとアンビルで押圧して半径方向の膨張を再圧縮した状態とした後であるとして説明したが、工具ホーンで超音波振動を加えるタイミングを、工具ホーンとアンビルで押圧して半径方向の膨張を再圧縮する工程を開始するときまたは、その直前、或いは直後としても、同等の接続強度が得られる。 In the third embodiment described above, the case where the groove 17 is provided in advance in the radial direction on the inner wall of the outer pipe of the resin molded product has been described. It is also possible to provide any of grooves having irregularities or other shapes.
In the above description of each embodiment, in order to facilitate understanding of the invention, the timing of applying ultrasonic vibration with the tool horn is a state in which radial expansion is recompressed by pressing with the tool horn and anvil. Although described as later, the timing of applying ultrasonic vibration with the tool horn, when starting the step of recompressing the radial expansion by pressing with the tool horn and anvil, or immediately before or immediately after, Equivalent connection strength is obtained.

実施形態で示したように、本発明は、外管と内管の間に挿入用空間を形成した点滴筒などの樹脂成形品に、前記挿入用空間内にチューブを圧接した状態で直接一体に接続する際に適用することができ、点滴用チューブと継手である点滴用筒の樹脂成形品など医療機器分野のチューブと樹脂成形品の溶着に用いられる他、化学プラント、化学実験用機械器具等の広い技術分野のチューブと樹脂成形品の溶着に適用することができる。 As shown in the embodiment, the present invention directly integrates a resin molded article such as a drip tube having an insertion space formed between an outer tube and an inner tube in a state where the tube is pressed into the insertion space. It can be applied when connecting and is used for welding tubes and resin molded products in the field of medical equipment such as resin molded products for drip tubes and joints for drip tubes that are joints, as well as chemical plants, machinery for chemical experiments, etc. It can be applied to welding of tubes and resin molded products in a wide range of technical fields.

１０、１０Ａ：樹脂成形品（点滴筒）
１０Ｂ：樹脂成形品（軸継手）
１１：外管
１１ａ：外管内壁
１１ｂ：外管外壁
１１ｃ：外管底壁（挿入用空間底壁）
１２：内管
１３：挿入用空間
２０、２１：外周面に段差のないチューブ（可撓性チューブ）
２２、２２Ａ：外周面に段差のあるチューブ（可撓性チューブ）
３０：工具ホーン
３１：移動枠（押し戻し手段）
３２：超音波振動手段
３３：バネ（押し戻し手段）
３４：エアシリンダー（押し戻し手段）
４０：アンビル
４３：バネ（押し戻し手段）
４４：エアシリンダー（押し戻し手段）
５０、５１：チューブ押し込み部材（手段）
７１：支持キャップ（回転手段）
７２：位置決めピン（回転手段）
８０：ベース台
８２：中空円柱部（回転手段）
８３ａ、８３ｂ：位置決め穴（回転手段） 10, 10A: Resin molded product (drip tube)
10B: Resin molded product (shaft coupling)
11: Outer tube 11a: Outer tube inner wall 11b: Outer tube outer wall 11c: Outer tube bottom wall (insertion space bottom wall)
12: Inner tube 13: Inserting spaces 20, 21: Tube without steps on the outer peripheral surface (flexible tube)
22, 22A: Tubes with a step on the outer peripheral surface (flexible tubes)
30: Tool horn 31: Moving frame (push back means)
32: Ultrasonic vibration means 33: Spring (push back means)
34: Air cylinder (push back means)
40: anvil 43: spring (push back means)
44: Air cylinder (push back means)
50, 51: Tube pushing member (means)
71: Support cap (rotating means)
72: Positioning pin (rotating means)
80: Base 82: Hollow column (rotating means)
83a, 83b: Positioning holes (rotating means)

Claims (9)

可撓性チューブを、樹脂成形品に設けた外管と内管の間の挿入用空間に一体接続するようにした、下記工程を備える可撓性チューブと樹脂成形品の超音波振動溶着方法、
（１）前記樹脂成形品の挿入用空間に可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させ、
（２）前記可撓性チューブの先端と外管を膨張させた状態から、前記樹脂成形品の外管外壁を、当該外管外壁の一面側に当接する工具ホーンと、外管外壁の工具ホーンと反対の他面側に当接するアンビルで押圧して、半径方向に膨張した前記外管と前記可撓性チューブを押し戻し、
（３）前記工具ホーンを超音波振動させ、前記樹脂成形品の外管内壁と可撓性チューブの外周面を加圧した状態で溶着し、
（４）前記工具ホーンと前記アンビルを前記樹脂成形品から離し、前記樹脂成形品を取り出す。 The flexible tube is integrally connected to the insertion space between the outer tube and the inner tube provided in the resin molded product, and the ultrasonic vibration welding method for the flexible tube and the resin molded product includes the following steps:
(1) The tip of the flexible tube is pushed into the space for inserting the resin molded product, and the tip of the flexible tube and the outer tube are expanded in the radial direction,
(2) A tool horn that abuts the outer pipe outer wall of the resin molded product on one surface side of the outer pipe outer wall from a state where the distal end of the flexible tube and the outer pipe are expanded, and a tool horn of the outer pipe outer wall. By pressing with the anvil that is in contact with the other surface side opposite to, the outer tube and the flexible tube expanded in the radial direction are pushed back.
(3) The tool horn is ultrasonically vibrated to weld the outer wall of the resin molded product and the outer peripheral surface of the flexible tube under pressure.
(4) Separate the tool horn and the anvil from the resin molded product, and take out the resin molded product. 可撓性チューブを、樹脂成形品に設けた外管と内管の間の挿入用空間に一体接続するようにした、下記工程を備える可撓性チューブと樹脂成形品の超音波振動溶着方法、
（１）前記樹脂成形品の挿入用空間に可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させ、
（２）前記可撓性チューブの先端と外管を膨張させた状態から、前記樹脂成形品の外管外壁を、当該外管外壁の一面側に当接する工具ホーンと、外管外壁の工具ホーンと反対の他面側に当接するアンビルで押圧して、半径方向に膨張した前記外管と前記可撓性チューブを押し戻し、
（３）前記工具ホーンを超音波振動させ、前記樹脂成形品の外管内壁と可撓性チューブの外周面を加圧した状態で溶着し、
（４）前記工具ホーンと前記アンビルを前記樹脂成形品から離し、
（５）前記工具ホーンと前記アンビルに対して、前記樹脂成形品を前記可撓性チューブ先端の軸芯の周りに所定角度、相対的に回転させ、
（６）前記（２）から（５）の工程を所定回数、繰り返し、
（７）前記工具ホーンと前記アンビルを前記樹脂成形品から離し、前記樹脂成形品を取り出す。 The flexible tube is integrally connected to the insertion space between the outer tube and the inner tube provided in the resin molded product, and the ultrasonic vibration welding method for the flexible tube and the resin molded product includes the following steps:
(1) The tip of the flexible tube is pushed into the space for inserting the resin molded product, and the tip of the flexible tube and the outer tube are expanded in the radial direction,
(2) A tool horn that abuts the outer pipe outer wall of the resin molded product on one surface side of the outer pipe outer wall from a state where the distal end of the flexible tube and the outer pipe are expanded, and a tool horn of the outer pipe outer wall. By pressing with the anvil that is in contact with the other surface side opposite to, the outer tube and the flexible tube expanded in the radial direction are pushed back.
(3) The tool horn is ultrasonically vibrated to weld the outer wall of the resin molded product and the outer peripheral surface of the flexible tube under pressure.
(4) Separate the tool horn and the anvil from the resin molded product,
(5) With respect to the tool horn and the anvil, the resin molded product is relatively rotated about the axis of the tip of the flexible tube by a predetermined angle.
(6) The steps (2) to (5) are repeated a predetermined number of times,
(7) The tool horn and the anvil are separated from the resin molded product, and the resin molded product is taken out. 前記可撓性チューブとして、予め外周面に段差を形成した可撓性チューブを用いることを特徴とする、
請求項１または２に記載の超音波振動溶着方法。 As the flexible tube, a flexible tube having a step formed on the outer peripheral surface in advance is used,
The ultrasonic vibration welding method according to claim 1 or 2. 前記樹脂成形品の外管内壁に予め半径方向に段差、溝、凹凸のいずれかを設けた請求項１から３の内の、いずれか一の請求項に記載された可撓性チューブと樹脂成形品の超音波振動溶着方法。 The flexible tube and resin molding according to any one of claims 1 to 3, wherein a step, a groove, or an unevenness is provided in advance on the inner wall of the outer tube of the resin molded product in the radial direction. Ultrasonic vibration welding method for products. 外管と内管の間に挿入用空間を形成した樹脂成形品を支持するベース台と、
可撓性チューブを把持して、前記ベース台に支持した前記樹脂成形品の挿入用空間に当該可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させる押し込み手段と、
前記樹脂成形品の外管外壁の一面側に当接する工具ホーンと、
前記樹脂成形品の外管外壁の工具ホーンと反対の他面側に当接するアンビルと、
前記樹脂成形品の外管外壁を前記工具ホーンと前記アンビルで押圧して、前記半径方向に膨張した前記外管と前記可撓性チューブを押し戻す押し戻し手段と、
前記工具ホーンを超音波振動させる超音波振動手段と、
前記押し込み手段と、前記押し戻し手段と、前記超音波振動手段を制御する制御手段と、を有し
前記制御手段は、
（１）前記押し込み手段により、前記ベース台に支持した前記樹脂成形品の挿入用空間に可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させ、
（２）前記可撓性チューブの先端と外管を膨張させた状態から、前記押し戻し手段により、前記樹脂成形品の外管外壁を前記工具ホーンと前記アンビルで押圧して、半径方向に膨張した前記外管と前記可撓性チューブを押し戻し、
（３）前記超音波振動手段により、前記工具ホーンを超音波振動させ、前記樹脂成形品の外管内壁と可撓性チューブの外周面を加圧した状態で溶着し、
（４）前記押し戻し手段により、前記工具ホーンと前記アンビルを前記樹脂成
形品から離すとともに、前記押し込み手段を前記樹脂成形品から離し、前記ベース台から前記樹脂成形品を取り出す、
工程を実行することにより、
可撓性チューブを、樹脂成形品に設けた外管と内管の間の挿入用空間に一体接続するようにした、可撓性チューブと樹脂成形品の超音波振動溶着装置。 A base that supports a resin molded product having an insertion space formed between the outer pipe and the inner pipe,
Hold the flexible tube and push the tip of the flexible tube into the space for inserting the resin molded product supported by the base to expand the tip of the flexible tube and the outer tube in the radial direction. Pushing means to
A tool horn abutting on one surface side of the outer pipe outer wall of the resin molded product,
An anvil that abuts on the other surface side of the outer wall of the resin molded product opposite to the tool horn of the outer wall,
An outer wall of the resin molded article is pressed by the tool horn and the anvil to push back the radially expanded outer tube and the flexible tube.
Ultrasonic vibrating means for ultrasonically vibrating the tool horn,
The pushing means, the pushing back means, and a control means for controlling the ultrasonic vibrating means, the control means,
(1) By the pushing means, the tip of the flexible tube is pushed into the space for inserting the resin molded product supported on the base table, and the tip of the flexible tube and the outer tube are radially expanded,
(2) From the state in which the tip of the flexible tube and the outer tube are expanded, the outer wall of the outer tube of the resin molded product is pressed by the tool horn and the anvil by the pushing-back means to expand in the radial direction. Pushing back the outer tube and the flexible tube,
(3) The tool horn is ultrasonically vibrated by the ultrasonic vibrating means, and the inner wall of the outer tube of the resin molded product and the outer peripheral surface of the flexible tube are welded under pressure.
(4) The push-back means separates the tool horn and the anvil from the resin molded product, the push-in means separates from the resin molded product, and the resin molded product is taken out from the base table.
By performing the process,
An ultrasonic vibration welding device for a flexible tube and a resin molded product, wherein the flexible tube is integrally connected to an insertion space between an outer pipe and an inner pipe provided in the resin molded product. 外管と内管の間に挿入用空間を形成した樹脂成形品を支持するベース台と、
可撓性チューブを把持して、前記ベース台に支持した前記樹脂成形品の挿入用空間に当該可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させる押し込み手段と、
前記樹脂成形品の外管外壁の一面側に当接する工具ホーンと、
前記樹脂成形品の外管外壁の工具ホーンと反対の他面側に当接するアンビルと、
前記樹脂成形品の外管外壁を前記工具ホーンと前記アンビルで押圧して、前記半径方向に膨張した前記外管と前記可撓性チューブを押し戻す押し戻し手段と、
前記工具ホーンを超音波振動させる超音波振動手段と、
更に、前記工具ホーンと前記アンビルに対して、前記樹脂成形品を前記可撓性チューブ先端の軸芯の周りに相対的に所定角度回転させる回転手段と、
前記押し込み手段と、前記押し戻し手段と、前記超音波振動手段と、前記回転手段を制御する制御手段と、
を有し、
前記制御手段は、
（１）前記押し込み手段により、前記ベース台に支持した前記樹脂成形品の挿入用空間に可撓性チューブの先端を押し込み、当該可撓性チューブの先端と前記外管を半径方向に膨張させ、
（２）前記可撓性チューブの先端と外管を膨張させた状態から、前記押し戻し手段により、前記樹脂成形品の外管外壁を前記工具ホーンと前記アンビルで押圧して、半径方向に膨張した前記外管と前記可撓性チューブを押し戻し、
（３）前記超音波振動手段により、前記工具ホーンを超音波振動させ、前記樹脂成形品の外管内壁と可撓性チューブの外周面を加圧した状態で溶着し、
（４）前記押し戻し手段により、前記工具ホーンと前記アンビルを前記樹脂成
形品から離し、
（５）前記回転手段により、前記工具ホーンと前記アンビルに対して、前記樹脂成形品を前記可撓性チューブ先端の軸芯の周りに所定角度、相対的に回転させ、
（６）上記（２）から（５）を所定回数、繰り返し、
（７）前記工具ホーンと前記アンビルを前記樹脂成形品から離すとともに、前記押し込み手段を前記樹脂成形品から離し、前記樹脂成形品を取り出す、
工程を実行することにより、
可撓性チューブを、樹脂成形品に設けた外管と内管の間の挿入用空間に一体接続するようにした、可撓性チューブと樹脂成形品の超音波振動溶着装置。 A base that supports a resin molded product having an insertion space formed between the outer pipe and the inner pipe,
Hold the flexible tube and push the tip of the flexible tube into the space for inserting the resin molded product supported by the base to expand the tip of the flexible tube and the outer tube in the radial direction. Pushing means to
A tool horn abutting on one surface side of the outer pipe outer wall of the resin molded product,
An anvil that abuts on the other surface side of the outer wall of the resin molded product opposite to the tool horn of the outer wall,
An outer wall of the resin molded article is pressed by the tool horn and the anvil to push back the radially expanded outer tube and the flexible tube.
Ultrasonic vibrating means for ultrasonically vibrating the tool horn,
Furthermore, with respect to the tool horn and the anvil, rotation means for relatively rotating the resin molded product around a shaft center of the flexible tube at a predetermined angle,
The pushing means, the pushing back means, the ultrasonic vibrating means, and a control means for controlling the rotating means,
Have
The control means is
(1) By the pushing means, the tip of the flexible tube is pushed into the space for inserting the resin molded product supported on the base table, and the tip of the flexible tube and the outer tube are radially expanded,
(2) From the state in which the tip of the flexible tube and the outer tube are expanded, the outer wall of the outer tube of the resin molded product is pressed by the tool horn and the anvil by the pushing-back means to expand in the radial direction. Pushing back the outer tube and the flexible tube,
(3) The tool horn is ultrasonically vibrated by the ultrasonic vibrating means, and the inner wall of the outer tube of the resin molded product and the outer peripheral surface of the flexible tube are welded under pressure.
(4) The push-back means separates the tool horn and the anvil from the resin molded product,
(5) The resin molding is relatively rotated about the axis of the tip of the flexible tube by a predetermined angle with respect to the tool horn and the anvil by the rotating means.
(6) The above (2) to (5) are repeated a predetermined number of times,
(7) The tool horn and the anvil are separated from the resin molded product, the pushing means is separated from the resin molded product, and the resin molded product is taken out.
By performing the process,
An ultrasonic vibration welding device for a flexible tube and a resin molded product, wherein the flexible tube is integrally connected to an insertion space between an outer pipe and an inner pipe provided in the resin molded product. 前記可撓性チューブとして、予め外周面に段差を形成した可撓性チューブを用いることを特徴とする、
請求項５または６に記載の超音波振動溶着装置。 As the flexible tube, a flexible tube having a step formed on the outer peripheral surface in advance is used,
The ultrasonic vibration welding device according to claim 5 or 6. 前記樹脂成形品の外管内壁に予め半径方向に段差、溝、凹凸のいずれかを設けた、請求項５から７のいずれか一の請求項に記載された可撓性チューブと樹脂成形品の超音波振動溶着装置。 The flexible tube and the resin molded product according to any one of claims 5 to 7, wherein a step, a groove, or an unevenness is provided in advance on the inner wall of the outer tube of the resin molded product in the radial direction. Ultrasonic vibration welding equipment. 前記樹脂成形品は、外管と、外管内に同軸方向に配置された内管とを備え、前記外管が、当該外管と前記内管との間に環状の挿入用空間を形成すべく、外管内壁と、外管および内管を連結する外管底壁とを有する、請求項５から８のいずれか一の請求項に記載された超音波振動溶着装置。 The resin molded product includes an outer pipe and an inner pipe coaxially arranged in the outer pipe, and the outer pipe forms an annular insertion space between the outer pipe and the inner pipe. The ultrasonic vibration welding device according to claim 5, further comprising an inner wall of the outer pipe and a bottom wall of the outer pipe connecting the outer pipe and the inner pipe.
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