JP2012254102A - Needle-mounted barrel and prefilled syringe - Google Patents

Needle-mounted barrel and prefilled syringe Download PDF

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JP2012254102A
JP2012254102A JP2011127247A JP2011127247A JP2012254102A JP 2012254102 A JP2012254102 A JP 2012254102A JP 2011127247 A JP2011127247 A JP 2011127247A JP 2011127247 A JP2011127247 A JP 2011127247A JP 2012254102 A JP2012254102 A JP 2012254102A
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needle
barrel
welded
fixing portion
needle fixing
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JP5912300B2 (en
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Taiji Hotta
泰治 堀田
Norihiko Asahi
徳彦 朝日
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Taisei Kako Co Ltd
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Taisei Kako Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a needle-mounted barrel which prevents formation of burrs and the like at the tip end of a needle-fixing part when welding the needle to a barrel: and to provide a prefilled syringe.SOLUTION: The needle-mounted barrel includes a barrel 1 formed into a cylindrical shape, and a needle 2 fixed to the barrel 1. The barrel 1 includes, at its tip end part, a cylindrical needle-fixing part 12 to which the needle 2 to be inserted into the inside of the barrel is fixed. The needle-fixing part 12 includes a welding part 12a having thermoplasticity and heated to weld the needle 2. In the barrel, the welding part 12a is disposed at a position separated from the tip end of the needle-fixing part 12 in an axis center direction.

Description

本発明は、筒状に形成されるバレルに針が固定される針付きバレルと、該針付きバレルを備えるプレフィルドシリンジに関する。   The present invention relates to a barrel with a needle in which a needle is fixed to a barrel formed in a cylindrical shape, and a prefilled syringe including the barrel with a needle.

従来、針付きバレルとして、筒状に形成されるバレルに針が固定されている針付きバレルが知られている。そして、斯かる針付きバレルによれば、バレルの先端部には、内部に挿入される針を固定する筒状の針固定部が設けられ、熱可塑性を有する針固定部の先端が加熱されることで、バレルに針が溶着されている（例えば、特許文献１）。   Conventionally, as a barrel with a needle, a barrel with a needle in which a needle is fixed to a barrel formed in a cylindrical shape is known. And according to such a barrel with a needle, the tip of the barrel is provided with a cylindrical needle fixing portion for fixing the needle inserted therein, and the tip of the thermoplastic needle fixing portion is heated. Thus, the needle is welded to the barrel (for example, Patent Document 1).

特開２００４−２４９０７３号公報JP 2004-249073 A

ところで、特許文献１に係る針付きバレルにおいては、バレルに針を溶着させるのに、熱可塑性を有する針固定部の先端が加熱されるため、針固定部の先端が変形する。このときに、バリ（加工過程で縁等に形成される突起）等が針固定部の先端に形成される場合がある。そして、バリ等が針固定部の先端に形成されると、例えば、皮下注射用注射器や皮内注射用注射器のように短い針が使用される際には、針固定部の先端が肌に接触され易いため、バレルが注射を受ける者に嫌悪感を与える場合もある。   By the way, in the barrel with a needle according to Patent Document 1, the tip of the needle fixing portion having thermoplasticity is heated to weld the needle to the barrel, so that the tip of the needle fixing portion is deformed. At this time, a burr (projection formed on the edge or the like in the processing process) or the like may be formed at the tip of the needle fixing portion. When a burr or the like is formed at the tip of the needle fixing portion, for example, when a short needle is used such as a hypodermic syringe or an intradermal injection syringe, the tip of the needle fixing portion contacts the skin. Because it is easy to be done, the barrel may give an aversion to those who receive the injection.

よって、本発明は、斯かる事情に鑑み、バレルに針を溶着させる際に、針固定部の先端にバリ等が形成されるのを防止できる針付きバレル及びプレフィルドシリンジを提供することを課題とする。   Therefore, in view of such circumstances, the present invention has an object to provide a barrel with a needle and a prefilled syringe that can prevent a burr and the like from being formed at the tip of a needle fixing portion when a needle is welded to the barrel. To do.

本発明に係る針付きバレルは、筒状に形成されるバレルと、バレルに固定される針とを備え、バレルは、内部に挿入される針を固定する筒状の針固定部を先端部に備え、針固定部は、熱可塑性を有し且つ加熱されることで針を溶着する溶着部を備える針付きバレルにおいて、溶着部は、軸心方向において針固定部の先端から離間した位置に配置されることを特徴とする。   A barrel with a needle according to the present invention includes a barrel formed in a cylindrical shape and a needle fixed to the barrel, and the barrel has a cylindrical needle fixing portion that fixes a needle inserted therein at a tip portion. The needle fixing part is a barrel with a needle having a thermoplasticity and a welding part for welding the needle by being heated, and the welding part is arranged at a position spaced from the tip of the needle fixing part in the axial direction. It is characterized by being.

本発明に係る針付きバレルによれば、溶着部は、熱可塑性を有すると共に、加熱されることで針を溶着する。そして、溶着部が、軸心方向において針固定部の先端から離間した位置に配置されているため、針固定部の先端に、バリ等が形成されるのを防止することができる。   According to the barrel with a needle according to the present invention, the welded portion has thermoplasticity and welds the needle by being heated. And since the welding part is arrange | positioned in the position spaced apart from the front-end | tip of a needle fixing part in an axial direction, it can prevent that a burr | flash etc. are formed in the front-end | tip of a needle fixing part.

また、本発明に係る針付きバレルにおいては、バレルは、溶着部が接触されるのを抑制すべく、溶着部を含む部位が凹状となるように形成されてもよい。   Further, in the barrel with a needle according to the present invention, the barrel may be formed such that a portion including the welded portion is concave in order to suppress contact of the welded portion.

斯かる構成の針付きバレルによれば、溶着部を含む部位が凹状となるように、バレルが形成されている。したがって、例えば、注射を受ける者の肌には、溶着部を含む凹状の部位よりも、その周りの部位の方が接触し易くなるため、注射を受ける者の肌に、溶着部が接触するのを抑制できる。   According to the barrel with a needle having such a configuration, the barrel is formed so that the portion including the welded portion is concave. Therefore, for example, since the region around the skin of the person who receives the injection is easier to contact than the concave portion including the welded portion, the welded portion comes into contact with the skin of the person who receives the injection. Can be suppressed.

また、本発明に係る針付きバレルにおいては、針固定部は、針の外周部と当接することで針を径方向で支持する支持部を備え、溶着部は、軸心方向において針固定部の基端からも離間した位置に配置され、支持部は、軸心方向において溶着部の両側の位置にそれぞれ配置されてもよい。   Further, in the barrel with a needle according to the present invention, the needle fixing portion includes a support portion that supports the needle in a radial direction by contacting the outer peripheral portion of the needle, and the welded portion of the needle fixing portion in the axial direction. The support portions may be disposed at positions on both sides of the welded portion in the axial direction.

斯かる構成の針付きバレルによれば、針固定部に設けられる支持部は、針の外周部と当接することで針を径方向で支持する。そして、溶着部が軸心方向において針固定部の先端だけでなく基端からも離間した位置に配置されているのに対して、支持部は、軸心方向において溶着部の両側の位置にそれぞれ配置されている。したがって、針固定部における溶着部となる部位が加熱されて溶融する際に、支持部が溶着部の両側の位置で針を支持するため、針が針固定部に対して位置ズレするのを防止できる。   According to the barrel with a needle having such a configuration, the support portion provided in the needle fixing portion supports the needle in the radial direction by contacting the outer peripheral portion of the needle. And while the welded portion is arranged at a position separated from not only the distal end of the needle fixing portion but also the proximal end in the axial direction, the support portions are respectively positioned at both sides of the welded portion in the axial direction. Has been placed. Therefore, when the portion that becomes the welded portion in the needle fixing portion is heated and melted, the support portion supports the needle at the positions on both sides of the welded portion, thereby preventing the needle from being displaced from the needle fixing portion. it can.

また、本発明に係る針付きバレルにおいては、針固定部は、先端部で且つ内周部に凹状部を備えてもよい。   Moreover, in the barrel with a needle according to the present invention, the needle fixing portion may be provided with a concave portion at the tip portion and in the inner peripheral portion.

斯かる構成の針付きバレルによれば、針固定部の先端部で且つ内周部に、凹状部が設けられている。これにより、針が針固定部の先端側から針固定部の内部に挿入される際に、凹状部が針固定部の内部に針を案内するため、針固定部の内部に針を確実に挿入することができる。   According to the barrel with a needle having such a configuration, the concave portion is provided at the distal end portion and the inner peripheral portion of the needle fixing portion. As a result, when the needle is inserted from the distal end side of the needle fixing portion into the needle fixing portion, the concave portion guides the needle into the needle fixing portion, so that the needle is surely inserted into the needle fixing portion. can do.

さらに、例えば、一般的に、針固定部から露出している針の外周部に、シリコン等の表面処理材が塗布されている。そして、針の先端側を上方に向けた状態で、表面処理材が硬化する際に、表面処理材が針固定部の先端に向けて流れた（垂れた）場合であっても、凹状部が表面処理材を収容できるため、針固定部の外周部に表面処理材が付着するのを防止できる。   Further, for example, a surface treatment material such as silicon is generally applied to the outer peripheral portion of the needle exposed from the needle fixing portion. And even when the surface treatment material flows toward the tip of the needle fixing portion when the surface treatment material is cured with the needle tip side facing upward, the concave portion is Since the surface treatment material can be accommodated, it is possible to prevent the surface treatment material from adhering to the outer peripheral portion of the needle fixing portion.

また、本発明に係るプレフィルドシリンジは、前記の針付きバレルと、バレルの内部に充填された充填物を封止すべくバレルの内部に挿入される弾性のガスケットとを備えることを特徴とする。   In addition, a prefilled syringe according to the present invention includes the above barrel with a needle and an elastic gasket that is inserted into the barrel so as to seal the filler filled in the barrel.

以上の如く、本発明に係る針付きバレル及びプレフィルドシリンジによれば、バレルに針を溶着させる際に、針固定部の先端にバリ等が形成されるのを防止できるという優れた効果を奏する。   As described above, according to the barrel with a needle and the prefilled syringe according to the present invention, when a needle is welded to the barrel, there is an excellent effect that a burr or the like can be prevented from being formed at the tip of the needle fixing portion.

本発明の一実施形態に係るプレフィルドシリンジの全体図であって、（ａ）は正面図、（ｂ）はＡ−Ａ線における断面図を示す。BRIEF DESCRIPTION OF THE DRAWINGS It is a general view of the prefilled syringe which concerns on one Embodiment of this invention, Comprising: (a) is a front view, (b) shows sectional drawing in the AA line. 同実施形態に係るプレフィルドシリンジの要部断面図であって、図１のＢ領域における拡大図を示す。It is principal part sectional drawing of the prefilled syringe which concerns on the same embodiment, Comprising: The enlarged view in the B area | region of FIG. 1 is shown. 同実施形態に係るプレフィルドシリンジの要部断面図であって、（ａ）は図２のＣ領域における拡大図、（ｂ）は図２のＤ領域における拡大図、（ｃ）はＥ−Ｅ線における断面図を示す。It is principal part sectional drawing of the prefilled syringe which concerns on the embodiment, Comprising: (a) is an enlarged view in C area | region of FIG. 2, (b) is an enlarged view in D area | region of FIG. 2, (c) is an EE line | wire. FIG. 同実施形態に係る針付きバレルの製造方法を説明する図であって、（ａ）及び（ｂ）はそれぞれ要部縦断面図を示す。It is a figure explaining the manufacturing method of the barrel with a needle concerning the embodiment, and (a) and (b) show the principal part longitudinal section, respectively. 同実施形態に係る針付きバレルの製造方法を説明する図であって、（ａ）は要部縦断面図、（ｂ）は要部正面図を示す。It is a figure explaining the manufacturing method of the barrel with a needle concerning the embodiment, (a) is a principal part longitudinal section and (b) shows a principal part front view. 本発明の他の実施形態に係る針付きバレルの要部図であって、（ａ）は正面図、（ｂ）は縦断面図を示す。It is a principal part figure of the barrel with a needle | hook which concerns on other embodiment of this invention, Comprising: (a) is a front view, (b) shows a longitudinal cross-sectional view. 本発明のさらに他の実施形態に係る針付きバレルの要部断面図であって、（ａ）は縦断面図、（ｂ）はＦ領域における拡大図、（ｃ）はＧ−Ｇ線における断面図を示す。It is principal part sectional drawing of the barrel with a needle | hook which concerns on other embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view, (b) is an enlarged view in F area | region, (c) is a cross section in GG line. The figure is shown.

以下、本発明に係るプレフィルドシリンジにおける一実施形態について、図１〜図５を参酌して説明する。   Hereinafter, an embodiment of the prefilled syringe according to the present invention will be described with reference to FIGS.

本実施形態に係るプレフィルドシリンジは、図１〜図３に示すように、内部に充填物Ｘが充填される筒状のバレル１と、バレル１の内部の充填物Ｘを外部に注出すべく、バレル１の先端部に固定される針２とを備える。また、プレフィルドシリンジは、針２を覆うべく、バレル１の先端部に装着されるキャップ３を備える。   The prefilled syringe according to the present embodiment, as shown in FIGS. 1 to 3, in order to pour out the cylindrical barrel 1 filled with the filling X inside and the filling X inside the barrel 1 to the outside. A needle 2 fixed to the tip of the barrel 1. Further, the prefilled syringe includes a cap 3 attached to the tip of the barrel 1 so as to cover the needle 2.

さらに、プレフィルドシリンジは、バレル１の内部に充填された薬液等の充填物Ｘを封止するプランジャ８を備える。そして、プランジャ８は、バレル１の内部に挿入されて充填物Ｘを封止する弾性のガスケット８１と、先端部がガスケット８１とネジ結合されるプランジャロッド８２とを備える。   Further, the prefilled syringe includes a plunger 8 that seals a filling X such as a chemical solution filled in the barrel 1. The plunger 8 includes an elastic gasket 81 that is inserted into the barrel 1 and seals the filling X, and a plunger rod 82 that has a tip portion screwed to the gasket 81.

なお、バレル１に針２が固定された構造体を、「針付きバレル」といい、針付きバレル（バレル１及び針２）とプランジャ８との組立体とを、「シリンジ」という。また、図１の「上方（側）」を「先端（側）」又は「一方（側）」とし、図１の「下方（側）」を「基端（側）」又は「他方（側）」として、以下説明する。   The structure in which the needle 2 is fixed to the barrel 1 is referred to as “barrel with needle”, and the assembly of the barrel with needle (barrel 1 and needle 2) and the plunger 8 is referred to as “syringe”. Also, “upper (side)” in FIG. 1 is “tip (side)” or “one (side)”, and “lower (side)” in FIG. 1 is “base end (side)” or “other (side)”. Will be described below.

バレル１は、筒状に形成されるバレル本体１１と、先端部に配置され、内部に挿入される針２を固定する筒状の針固定部１２と、先端部に配置され、キャップ３と係合する筒状の係合部１３とを備える。また、バレル１は、剛性を有するように形成されていると共に、熱可塑性を有する材質で形成されており、例えば、ＣＯＰ（シクロオレフィンポリマー）、ＣＯＣ（シクロオレフィンコポリマー）、ＰＰ（ポリプロピレン）、又はＰＥ（ポリエチレン）といった樹脂やガラス等で形成されている。   The barrel 1 has a barrel main body 11 formed in a cylindrical shape, a cylindrical needle fixing portion 12 that is disposed at the distal end portion and fixes a needle 2 inserted therein, and is disposed at the distal end portion and is engaged with the cap 3. And a cylindrical engaging portion 13 to be joined. In addition, the barrel 1 is formed to have rigidity and is formed of a material having thermoplasticity, for example, COP (cycloolefin polymer), COC (cycloolefin copolymer), PP (polypropylene), or It is made of resin such as PE (polyethylene), glass or the like.

バレル本体１１は、先端部に、キャップ３の基端部と当接する当接部１１１を備える。また、バレル本体１１は、基端部に、指が掛けられるフランジ形状の指掛部１１２を備える。そして、バレル本体１１は、外径が針固定部１２の外径よりも大きく且つ係合部１３の外径よりも大きくなるように形成されている。   The barrel main body 11 includes a contact portion 111 that contacts the proximal end portion of the cap 3 at the distal end portion. Further, the barrel main body 11 includes a flange-shaped finger hook portion 112 on which a finger is hung at the base end portion. The barrel body 11 is formed so that the outer diameter is larger than the outer diameter of the needle fixing portion 12 and larger than the outer diameter of the engaging portion 13.

針固定部１２は、バレル本体１１の先端部から突出する円筒状の固定部本体１２１と、固定部本体１２１の内周部から径方向内方に突出し、針２の外周部と当接することで針２を径方向で支持する支持部１２２とを備える。また、針固定部１２は、熱可塑性を有し且つ加熱されることで針２を溶着する溶着部（図２及び図３において、ドット領域にて図示しており、図５〜図７においても同様）１２ａと、加熱されずに針２と溶着しない非溶着部（非加熱部）１２ｂ，１２ｂとを備える。   The needle fixing part 12 protrudes radially inward from the inner peripheral part of the fixing part main body 121 and the outer peripheral part of the needle 2 by abutting with the outer peripheral part of the needle 2. And a support portion 122 that supports the needle 2 in the radial direction. The needle fixing portion 12 has thermoplasticity and is welded to weld the needle 2 when heated (shown in the dot region in FIGS. 2 and 3, and also in FIGS. 5 to 7). Similarly, 12a and non-welded portions (non-heated portions) 12b and 12b that are not heated and are not welded to the needle 2 are provided.

固定部本体１２１は、先端部で且つ内周部に、凹状部１２１ａを備える。そして、凹状部１２１ａは、先端に向けて徐々に開口が拡がるようにテーパ状に形成されている。また、支持部１２２は、周方向に沿って環状に延設されている。そして、支持部１２２は、針固定部１２の基端部に配置されている。したがって、支持部１２２は、溶着部１２ａより基端側の非溶着部１２ｂである。   The fixed portion main body 121 includes a concave portion 121a at the tip and at the inner periphery. And the recessed part 121a is formed in the taper shape so that opening may spread gradually toward the front-end | tip. Moreover, the support part 122 is extended annularly along the circumferential direction. The support portion 122 is disposed at the proximal end portion of the needle fixing portion 12. Therefore, the support part 122 is the non-welding part 12b on the base end side with respect to the welding part 12a.

係合部１３は、円筒状に形成されていると共に、バレル本体１１の先端部から突設されている。そして、係合部１３は、内部に針固定部１２が挿入されており、針固定部１２の基端側を収容している。また、係合部１３は、内径が針固定部１２の外径よりも大きくなるように形成されている。   The engaging portion 13 is formed in a cylindrical shape and protrudes from the distal end portion of the barrel main body 11. The engaging portion 13 has the needle fixing portion 12 inserted therein and accommodates the proximal end side of the needle fixing portion 12. Further, the engaging portion 13 is formed so that the inner diameter is larger than the outer diameter of the needle fixing portion 12.

溶着部１２ａは、軸心方向において、針固定部１２の先端から離間した位置で且つ基端からも離間した位置に配置されている。具体的には、溶着部１２ａは、針固定部１２における軸心方向の中途部に配置されている。これにより、非溶着部１２ｂ，１２ｂは、溶着部１２ａの先端側と基端側とにそれぞれ配置されている。   The welding portion 12a is disposed at a position away from the distal end of the needle fixing portion 12 and also away from the proximal end in the axial direction. Specifically, the welded portion 12 a is disposed in the middle portion of the needle fixing portion 12 in the axial center direction. Thereby, the non-welding parts 12b and 12b are arrange | positioned at the front end side and the base end side of the welding part 12a, respectively.

そして、溶着部１２ａは、周方向に亘って連続的に配置されている。また、溶着部１２ａは、外径が軸心方向で隣接する各非溶着部１２ｂの外径よりも小さくなるように形成されている。即ち、溶着部１２ａは、針固定部１２の外周部が凹状となるように形成されている。   And the welding part 12a is arrange | positioned continuously over the circumferential direction. Moreover, the welding part 12a is formed so that an outer diameter may become smaller than the outer diameter of each non-welding part 12b adjacent in an axial direction. That is, the welding part 12a is formed so that the outer peripheral part of the needle fixing part 12 is concave.

また、バレル１全体としては、溶着部１２ａを含む部位は、先端側に配置される非溶着部１２ｂと、基端側に配置される係合部１３との間に配置されることで、凹状に形成されている。具体的には、基端側の非溶着部１２ｂのうち係合部１３から突出している先端部と、溶着部１２ａとは、先端側に配置される非溶着部１２ｂと、基端側に配置される係合部１３との間に配置されることで、凹状に形成されている。   Further, as the barrel 1 as a whole, the portion including the welded portion 12a is disposed between the non-welded portion 12b disposed on the distal end side and the engaging portion 13 disposed on the proximal end side, thereby forming a concave shape. Is formed. Specifically, of the non-welded portion 12b on the proximal end side, the distal end portion protruding from the engaging portion 13 and the welded portion 12a are disposed on the proximal end side with the non-welded portion 12b disposed on the distal end side. It is formed in a concave shape by being disposed between the engaging portion 13 to be formed.

針２は、溶着部１２ａに溶着される外周部に凹凸部２１を備えている。具体的には、針２は、軸心方向の中途部に凹凸部２１を備えている。そして、針２は、充填物Ｘが内部を流通するように筒状に形成されていると共に、先端部が先鋭となるように形成されている。また、針２は、剛性を有するように形成され、例えば、ステンレス鋼といった金属で形成されている。   The needle 2 includes an uneven portion 21 on the outer peripheral portion welded to the welded portion 12a. Specifically, the needle 2 includes a concavo-convex portion 21 in the middle portion in the axial direction. And the needle | hook 2 is formed so that the front-end | tip part may become sharp while being formed in the cylinder shape so that the filling X may distribute | circulate the inside. The needle 2 is formed to have rigidity, and is formed of a metal such as stainless steel, for example.

キャップ３は、バレル１の針固定部１２、バレル１の係合部１３、及び針２を収容すべく筒状に形成されていると共に、先端側が閉塞され且つ基端側が開放されるように形成されている。そして、キャップ３は、基端部が係合部１３を外側から嵌合するように係合すると共に、基端部がバレル１の当接部１１１と当接することで、バレル１に装着される。   The cap 3 is formed in a cylindrical shape so as to accommodate the needle fixing portion 12 of the barrel 1, the engaging portion 13 of the barrel 1, and the needle 2, and is formed so that the distal end side is closed and the proximal end side is opened. Has been. The cap 3 is attached to the barrel 1 by engaging the base end portion so that the engaging portion 13 is fitted from the outside and the base end portion abutting against the abutting portion 111 of the barrel 1. .

また、キャップ３は、外径がバレル本体１１の外径と同じ、又は、外径がバレル本体１の外径より小さくなるように形成されている。なお、キャップ３は、弾性を有するように形成され、例えば、ゴム等の樹脂で形成されている。   The cap 3 is formed so that the outer diameter is the same as the outer diameter of the barrel body 11 or the outer diameter is smaller than the outer diameter of the barrel body 1. The cap 3 is formed so as to have elasticity, and is formed of a resin such as rubber, for example.

本実施形態に係るプレフィルドシリンジの構成については以上の通りであり、次に、本実施形態に係るプレフィルドシリンジの製造方法について説明する。   The configuration of the prefilled syringe according to the present embodiment is as described above. Next, a method for manufacturing the prefilled syringe according to the present embodiment will be described.

まず、滑らかに形成されている針２の外周部に、細かな粒体を衝突させる、所謂、サンドブラスト加工を行うことで、針２の外周部に凹凸部２１が形成される。そして、図４（ａ）に示すように、バレル１の先端側が上方となるように、バレル１を配置させると共に、針固定部１２の軸心と針２の軸心とが一致するように、バレル１と針２とを配置させた後に、針２を針固定部１２の内部に挿入させる。このとき、針固定部１２の固定部本体１２１の凹状部１２１ａが針２を固定部本体１２１の内部に向けて案内する。   First, by performing so-called sand blasting, in which fine particles collide with the outer peripheral portion of the needle 2 that is formed smoothly, the uneven portion 21 is formed on the outer peripheral portion of the needle 2. Then, as shown in FIG. 4 (a), the barrel 1 is arranged so that the tip end side of the barrel 1 is upward, and the axis of the needle fixing portion 12 and the axis of the needle 2 coincide with each other. After the barrel 1 and the needle 2 are arranged, the needle 2 is inserted into the needle fixing portion 12. At this time, the concave portion 121 a of the fixing portion main body 121 of the needle fixing portion 12 guides the needle 2 toward the inside of the fixing portion main body 121.

すると、図４（ｂ）に示すように、針２の基端部が針固定部１２の支持部１２２に外側から嵌合されるため、針２の基端部が周方向において支持部１２２に支持される。斯かる状態においては、固定部本体１２１は、支持部１２２よりも先端側の位置、即ち、支持部１２２以外の部位で、針２と離間しており接触していない。   Then, as shown in FIG. 4B, the proximal end portion of the needle 2 is fitted to the support portion 122 of the needle fixing portion 12 from the outside, so that the proximal end portion of the needle 2 is connected to the support portion 122 in the circumferential direction. Supported. In such a state, the fixing portion main body 121 is separated from the needle 2 and is not in contact with a position on the distal end side of the support portion 122, that is, at a portion other than the support portion 122.

なお、針２の外径が支持部１２２の内径と同じに形成されており、針２の基端部が支持部１２２に外側から嵌合される構成でもよく、或いは、針２の外径が支持部１２２の内径よりも若干大きく形成されており、針２が支持部１２２の内部に挿入されるのに伴って、支持部１２２が針２に圧接されて塑性変形することで、針２の基端部が支持部１２２に外側から嵌合される構成でもよい。   The outer diameter of the needle 2 may be the same as the inner diameter of the support portion 122, and the base end portion of the needle 2 may be fitted to the support portion 122 from the outside. Alternatively, the outer diameter of the needle 2 may be The inner diameter of the support portion 122 is slightly larger than the inner diameter of the support portion 122. As the needle 2 is inserted into the support portion 122, the support portion 122 is pressed against the needle 2 and is plastically deformed. The base end portion may be fitted to the support portion 122 from the outside.

斯かる状態においては、針２の先端側が把持手段（図示及び採番していない）に把持されることにより、針固定部１２の軸心と針２の軸心とが一致するように、バレル１と針２とが保持されている。そして、バーナー等の加熱手段（図示及び採番していない）が針固定部１２の軸心方向の中途部を加熱すると、針固定部１２の加熱された部位が溶融する。   In such a state, the tip side of the needle 2 is gripped by gripping means (not shown or numbered), so that the axis of the needle fixing portion 12 and the axis of the needle 2 are aligned. 1 and the needle 2 are held. When a heating means such as a burner (not shown or numbered) heats a midway portion of the needle fixing portion 12 in the axial direction, the heated portion of the needle fixing portion 12 is melted.

その後、押圧手段（図示及び採番していない）が針固定部１２の溶融した部位を径方向内方に向けて押圧することで、図５に示すように、針固定部１２が変形して針２と当接する。このとき、針２の外周部に凹凸部２１が形成されているため、針固定部１２の溶融した部位が凹凸部２１に密着するように変形する。そして、針固定部１２の溶融した部位が冷却されると、斯かる部位、即ち、溶着部１２ａが針２を溶着する。   Thereafter, the pressing means (not shown and numbered) presses the melted portion of the needle fixing portion 12 inward in the radial direction, so that the needle fixing portion 12 is deformed as shown in FIG. Abuts with the needle 2. At this time, since the uneven portion 21 is formed on the outer peripheral portion of the needle 2, the melted portion of the needle fixing portion 12 is deformed so as to be in close contact with the uneven portion 21. When the melted portion of the needle fixing portion 12 is cooled, the portion, that is, the welded portion 12 a welds the needle 2.

なお、針固定部１２を加熱する際には、加熱された部位が３００℃以上となるように、また、溶着部１２ａの軸心方向の長さが３〜８ｍｍとなるように、針固定部１２を加熱するのが好ましい。また、溶着部１２ａの肉厚が０．５〜１．２ｍｍとなるように、針固定部１２の肉厚を設定するのが好ましい。   When the needle fixing part 12 is heated, the needle fixing part is set so that the heated portion is 300 ° C. or higher and the length of the welded part 12a in the axial direction is 3 to 8 mm. 12 is preferably heated. Moreover, it is preferable to set the thickness of the needle fixing portion 12 so that the thickness of the welded portion 12a is 0.5 to 1.2 mm.

その後、針２の滑り性を向上させるべく、針固定部１２から露出している針２の外周部に、シリコン等の表面処理材（図示及び採番していない）が塗布された後に、針２の先端側を上方に向けた状態で、表面処理材を乾燥させる。このとき、針２の外周部に塗布されている表面処理材が垂れた場合には、固定部本体１２の凹状部１２１ａが表面処理材を受け入れて収容する。以上により、針付きバレルが完成する。   Thereafter, in order to improve the slipperiness of the needle 2, a surface treatment material (not shown or numbered) such as silicon is applied to the outer peripheral portion of the needle 2 exposed from the needle fixing portion 12, and then the needle With the tip end side of 2 facing upward, the surface treatment material is dried. At this time, when the surface treatment material applied to the outer peripheral portion of the needle 2 hangs down, the concave portion 121a of the fixed portion main body 12 receives and accommodates the surface treatment material. With the above, a barrel with a needle is completed.

そして、キャップ３をバレル１に装着した後に、バレル１の内部に、薬液等の充填物Ｘを充填し、さらに、ガスケット８１を基端部側からバレル１の内部に挿入した後に、プランジャロッド８２をガスケット８１に結合する。これにより、図１〜図３に示すようなプレフィルドシリンジが完成する。   After the cap 3 is attached to the barrel 1, the inside of the barrel 1 is filled with a filling X such as a chemical solution, and the gasket 81 is inserted into the barrel 1 from the base end side, and then the plunger rod 82. To the gasket 81. Thereby, a prefilled syringe as shown in FIGS. 1-3 is completed.

以上より、本実施形態に係るプレフィルドシリンジによれば、熱可塑性を有し且つ加熱されることで針２を溶着する溶着部１２ａは、軸心方向において針固定部１２の先端から離間した位置に配置されているため、針固定部１２の先端にバリ等が形成されるのを防止できる。   As mentioned above, according to the prefilled syringe which concerns on this embodiment, it has thermoplasticity, and the welding part 12a which welds the needle | hook 2 by being heated is in the position spaced apart from the front-end | tip of the needle fixing | fixed part 12 in an axial direction. Due to the arrangement, it is possible to prevent burrs and the like from being formed at the tip of the needle fixing portion 12.

これにより、例えば、針固定部１２に針２が溶着された後の製造工程において、針固定部１２の先端に、異物が付着するのを抑制できると共に、注射器として使用される際に、バレル１が注射を受ける者に嫌悪感を与えるのを抑制できる。また、溶着部１２ａが針２に隣接されていないため、例えば、溶着部１２ａにバリ等が形成され、仮に溶着部１２ａに異物が付着したとしても、針２に異物が付着するのを防止できる。   Thereby, for example, in the manufacturing process after the needle 2 is welded to the needle fixing portion 12, it is possible to suppress foreign matter from adhering to the tip of the needle fixing portion 12, and when used as a syringe, the barrel 1 Can suppress disgust in those who receive injections. Further, since the welded portion 12a is not adjacent to the needle 2, for example, a burr or the like is formed on the welded portion 12a, and even if a foreign matter adheres to the welded portion 12a, the foreign matter can be prevented from adhering to the needle 2. .

また、本実施形態に係るプレフィルドシリンジによれば、溶着部１２ａを含む部位は、先端側に配置される非溶着部１２ｂと、基端側に配置される係合部１３との間に配置されることで、凹状に形成されている。したがって、例えば、溶着部１２ａよりも、先端側の非溶着部１２ｂや係合部１３の方が、注射を受ける者の肌に接触し易くなるため、注射を受ける者の肌に、溶着部１２ａが接触するのを抑制できる。   Moreover, according to the prefilled syringe which concerns on this embodiment, the site | part containing the welding part 12a is arrange | positioned between the non-welding part 12b arrange | positioned at the front end side, and the engaging part 13 arrange | positioned at the base end side. Therefore, it is formed in a concave shape. Therefore, for example, the non-welded portion 12b and the engaging portion 13 on the distal end side are more likely to come into contact with the skin of the person receiving the injection than the welded portion 12a. Can be prevented from contacting.

また、本実施形態に係るプレフィルドシリンジによれば、溶着部１２ａが針２の外周部に形成されている凹凸部２１と密着している。したがって、針２の凹凸部２１が軸方向及び周方向で溶着部１２ａに係止されているため、針２が針固定部１２に確実に固定されている。   Moreover, according to the prefilled syringe which concerns on this embodiment, the welding part 12a is closely_contact | adhered with the uneven | corrugated | grooved part 21 currently formed in the outer peripheral part of the needle | hook 2. FIG. Therefore, since the uneven portion 21 of the needle 2 is locked to the welded portion 12 a in the axial direction and the circumferential direction, the needle 2 is securely fixed to the needle fixing portion 12.

また、本実施形態に係るプレフィルドシリンジによれば、針固定部１２の先端部で且つ内周部に、凹状部１２１ａが設けられている。これにより、針２が針固定部１２の先端側から針固定部１２の内部に挿入される際に、凹状部１２１ａが針２を針固定部１２の内部に案内するため、針固定部１２の内部に針２を確実に挿入することができる。   Moreover, according to the prefilled syringe which concerns on this embodiment, the recessed part 121a is provided in the front-end | tip part of the needle fixing | fixed part 12, and an inner peripheral part. Accordingly, when the needle 2 is inserted into the needle fixing portion 12 from the distal end side of the needle fixing portion 12, the concave portion 121a guides the needle 2 to the inside of the needle fixing portion 12. The needle 2 can be reliably inserted inside.

また、本実施形態に係るプレフィルドシリンジによれば、針固定部１２から露出している針２の外周部に、表面処理材が塗布されている。そして、針２の先端側を上方に向けた状態で、表面処理材を乾燥させて硬化させる際に、表面処理材が針固定部１２の先端に向けて垂れた場合であっても、凹状部１２１ａが表面処理材を収容できるため、針固定部１２の外周部に表面処理材が付着するのを防止できる。   Moreover, according to the prefilled syringe which concerns on this embodiment, the surface treatment material is apply | coated to the outer peripheral part of the needle 2 exposed from the needle fixing | fixed part 12. FIG. When the surface treatment material is dried and cured with the tip side of the needle 2 facing upward, even if the surface treatment material hangs down toward the tip of the needle fixing portion 12, the concave portion Since 121a can accommodate a surface treatment material, it can prevent that a surface treatment material adheres to the outer peripheral part of the needle fixing | fixed part 12. FIG.

なお、本発明に係る針付きバレル及びプレフィルドシリンジは、上記した実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。また、下記する各種の変更例に係る構成や方法等を任意に選択して、上記した実施形態に係る構成や方法等に採用してもよいことは勿論である。   In addition, the barrel with a needle and the prefilled syringe according to the present invention are not limited to the above-described embodiments, and it is needless to say that various modifications can be made without departing from the gist of the present invention. Moreover, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

例えば、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、溶着部１２ａが周方向に亘って連続的に配置される構成を説明したが、斯かる構成に限られない。具体的には、溶着部は、周方向において部分的に配置される構成、例えば、周方向に亘って断続的に配置される構成でもよい。   For example, in the barrel with a needle and the prefilled syringe according to the above-described embodiment, the configuration in which the welding portion 12a is continuously arranged in the circumferential direction has been described, but the configuration is not limited thereto. Specifically, the welding part may be configured to be partially arranged in the circumferential direction, for example, to be intermittently arranged in the circumferential direction.

また、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、溶着部１２ａが針固定部１２の軸心方向における中途部に配置される構成を説明したが、斯かる構成に限られない。例えば、溶着部は、針固定部の軸心方向における基端を含む部位に配置される構成でもよい。   Moreover, in the barrel with a needle and the prefilled syringe according to the above-described embodiment, the configuration in which the welded portion 12a is disposed in the middle portion in the axial direction of the needle fixing portion 12 has been described, but the configuration is not limited thereto. For example, the welded portion may be arranged at a portion including the proximal end in the axial direction of the needle fixing portion.

また、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、キャップ３と係合するバレル１の係合部１３が溶着部１２ａよりも基端側に配置される構成を説明したが、斯かる構成に限られない。例えば、図６に示すように、バレル４は、溶着部４２ａよりも先端側に、キャップ３０と係合する係合部４３を備える構成でもよい。   Moreover, in the barrel with a needle and the prefilled syringe according to the above-described embodiment, the configuration in which the engaging portion 13 of the barrel 1 that engages with the cap 3 is disposed closer to the proximal end side than the welded portion 12a has been described. It is not limited to the configuration. For example, as shown in FIG. 6, the barrel 4 may be configured to include an engaging portion 43 that engages with the cap 30 on the tip side of the welded portion 42 a.

図６に係るバレル４は、バレル本体４１の先端部から突設される針固定部４２の基端側に、溶着部４２ａを備える。即ち、バレル４は、軸心方向における溶着部４２ａの両側にそれぞれ非溶着部４２ｂ，４２ｂを備える。   The barrel 4 according to FIG. 6 includes a welded portion 42 a on the proximal end side of the needle fixing portion 42 protruding from the distal end portion of the barrel main body 41. That is, the barrel 4 includes non-welded portions 42b and 42b on both sides of the welded portion 42a in the axial direction.

係合部４３は、円筒状に形成されている。そして、係合部４３は、内部に針固定部４２が挿入されており、針固定部４２の先端側を収容している。また、係合部４３は、内径が針固定部４２の外径よりも大きくなるように形成されている。さらに、係合部４３は、溶着部４２ａよりも軸心方向の先端側に配置されている。   The engaging part 43 is formed in a cylindrical shape. The engaging portion 43 has a needle fixing portion 42 inserted therein and accommodates the distal end side of the needle fixing portion 42. Further, the engaging portion 43 is formed so that the inner diameter is larger than the outer diameter of the needle fixing portion 42. Further, the engaging portion 43 is disposed on the distal end side in the axial direction with respect to the welded portion 42a.

斯かる構成によれば、溶着部４２ａを含む部位（具体的には、基端側の非溶着部４２ｂ、溶着部４２ａ、及び先端側の非溶着部４２ｂの基端部）は、先端側に配置される係合部４３と、基端側に配置されるバレル本体４１との間に配置されることで、凹状に形成されている。したがって、例えば、溶着部４２ａよりも、係合部４３の外周部やバレル本体４１の先端側の方が注射を受ける者の肌に接触され易くなるため、注射を受ける者の肌に、溶着部４２ａが接触するのを抑制できる。   According to such a configuration, the portion including the welded portion 42a (specifically, the base end portion of the non-welded portion 42b on the base end side, the welded portion 42a, and the non-welded portion 42b on the distal end side) is located on the distal end side. By being arranged between the engaging portion 43 arranged and the barrel main body 41 arranged on the base end side, it is formed in a concave shape. Therefore, for example, since the outer peripheral portion of the engaging portion 43 and the distal end side of the barrel body 41 are more likely to come into contact with the skin of the person receiving the injection than the welded portion 42a, the welded portion is attached to the skin of the person receiving the injection. It can suppress that 42a contacts.

また、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、支持部１２２が周方向に沿って連続した環状に延設される構成を説明したが、斯かる構成に限られない。例えば、図７に示すように、支持部５２２は、周方向に沿って断続的な環状、即ち、円弧状に延設される構成でもよい。   Moreover, in the barrel with a needle | hook and prefilled syringe which concern on the said embodiment, although the support part 122 was extended in the cyclic | annular form extended along the circumferential direction, it was not restricted to such a structure. For example, as illustrated in FIG. 7, the support portion 522 may be configured to extend intermittently in the circumferential direction, that is, in an arc shape.

また、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、支持部１２２が針固定部１２の基端部に配置され、支持部１２２が溶着部１２ａの基端側のみに配置される構成を説明したが、斯かる構成に限られない。例えば、支持部は、軸心方向において溶着部の先端側のみに配置される構成でもよく、また、図７に示すように、支持部５２２，５２２は、軸心方向において中途部に配置される溶着部５２ａの先端側及び基端側の両側の位置にそれぞれ配置される構成でもよい。   Moreover, in the barrel with a needle and the prefilled syringe according to the above embodiment, the support portion 122 is disposed at the proximal end portion of the needle fixing portion 12, and the support portion 122 is disposed only at the proximal end side of the welded portion 12a. Although described, it is not limited to such a configuration. For example, the support part may be configured to be disposed only on the distal end side of the welded part in the axial direction, and as illustrated in FIG. 7, the support parts 522 and 522 are disposed in the middle part in the axial direction. The structure arrange | positioned at the position of the both sides of the front end side of the welding part 52a and a base end side, respectively may be sufficient.

図７に係るバレル５は、バレル本体５１の先端部から突設される針固定部５２の固定部本体５２１の内周部から、径方向内方に突出する支持部５２２，５２２を備える。そして、各支持部５２２は、固定部本体５２１の内周部から径方向に突出する複数（図７においては三つ）の支持片５２２ａ，…を備える。   The barrel 5 according to FIG. 7 includes support portions 522 and 522 that protrude radially inward from the inner peripheral portion of the fixing portion main body 521 of the needle fixing portion 52 that protrudes from the distal end portion of the barrel main body 51. Each support portion 522 includes a plurality of (three in FIG. 7) support pieces 522a,... Protruding in the radial direction from the inner peripheral portion of the fixed portion main body 521.

各支持片５２２ａは、軸心方向に沿って直線状に延設されている。さらに、複数の支持片５２２ａ，…は、周方向に沿って円弧状にそれぞれ延設されると共に、所定間隔を有して周方向に並列されている。なお、バレル５の溶着部５２ａに相当する部位が少なくとも溶融する前においては、当該部位にも、斯かる支持片５２２ａ，…と同じ構成の突起片が複数並列されている。   Each support piece 522a extends linearly along the axial direction. Further, the plurality of support pieces 522a,... Extend in an arc shape along the circumferential direction, and are arranged in parallel in the circumferential direction with a predetermined interval. In addition, before the site | part corresponding to the welding part 52a of the barrel 5 melt | dissolves at least, the projection piece of the same structure as this support piece 522a ... is parallelly arranged also in the said site | part.

斯かる構成によれば、非溶着部５２ｂに配置される支持部５２２，５２２は、軸心方向において溶着部５２ａの両側の位置にそれぞれ配置されている。したがって、溶着部５２ａとなる部位が加熱されて溶融する際に、支持部５２２，５２２が溶着部５２ａの両側の位置で針２を支持するため、針２が針固定部５２に対して位置ズレするのを防止できる。さらには、上記実施形態のような針２の先端側を把持する把持手段を設ける必要がない。   According to such a configuration, the support portions 522 and 522 disposed in the non-welded portion 52b are respectively disposed at positions on both sides of the welded portion 52a in the axial direction. Accordingly, when the portion to be the welded portion 52a is heated and melted, the support portions 522 and 522 support the needle 2 at the positions on both sides of the welded portion 52a, so that the needle 2 is displaced with respect to the needle fixing portion 52. Can be prevented. Furthermore, it is not necessary to provide gripping means for gripping the distal end side of the needle 2 as in the above embodiment.

また、支持部５２２の内径（各支持片５２２ａに内接する円の直径）が、針２の外径と同じ、或いは、針２の外径よりも小さく設定することにより、針２が針固定部５２に挿入されると、針２が支持部５２２に外側から嵌合される。したがって、針２が支持部５２２と接する、より好ましくは、針２が支持部５２２から径方向内方に向けて押圧（密接）されることにより、溶着部５２ａとなる部位を加熱するだけで、溶着部５２ａが針２を溶着できるため、上記実施形態のような斯かる部位を押圧する押圧手段を設ける必要がない。   Further, by setting the inner diameter of the support portion 522 (the diameter of a circle inscribed in each support piece 522a) to be the same as the outer diameter of the needle 2 or smaller than the outer diameter of the needle 2, the needle 2 is fixed to the needle fixing portion. When inserted into 52, the needle 2 is fitted to the support portion 522 from the outside. Therefore, the needle 2 is in contact with the support portion 522. More preferably, the needle 2 is pressed (closely) inward in the radial direction from the support portion 522. Since the welding part 52a can weld the needle | hook 2, it is not necessary to provide the press means which presses such a site | part like the said embodiment.

また、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、針固定部１２の所定部位を加熱して溶融した後に、斯かる部位を径方向内方に向けて押圧する構成を説明したが、斯かる構成に限られない。例えば、バレルは、針固定部を加熱されることで、斯かる部位が熱収縮することにより、針２を溶着する構成でもよい。   Moreover, in the barrel with a needle and the prefilled syringe according to the above-described embodiment, after heating and melting a predetermined portion of the needle fixing portion 12, the configuration is described in which such a portion is pressed inward in the radial direction. It is not limited to such a configuration. For example, the barrel may have a configuration in which the needle 2 is welded when the needle fixing portion is heated so that the portion thermally contracts.

また、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、針２の外周部に凹凸部２１が形成される構成を説明したが、斯かる構成に限られない。例えば、針の外周部に、凹凸部が形成されていない構成でもよく、また、凸部のみが形成される構成でもよく、さらには、凹部のみが形成される構成でもよい。   Moreover, in the barrel with a needle and the prefilled syringe according to the above-described embodiment, the configuration in which the uneven portion 21 is formed on the outer peripheral portion of the needle 2 has been described, but the configuration is not limited thereto. For example, a configuration in which the uneven portion is not formed on the outer peripheral portion of the needle, a configuration in which only the convex portion is formed, or a configuration in which only the concave portion is formed may be employed.

また、上記実施形態に係る針付きバレル及びプレフィルドシリンジにおいては、針２がバレル１に溶着された後に、針２の外周部に表面処理材が塗布される構成を説明したが、斯かる構成に限られない。例えば、針２の外周部に表面処理材が塗布された後に、針２が針固定部１２の内部に挿入され、その後、針２がバレル１に溶着される構成でもよい。   In addition, in the barrel with a needle and the prefilled syringe according to the above embodiment, the configuration in which the surface treatment material is applied to the outer peripheral portion of the needle 2 after the needle 2 is welded to the barrel 1 has been described. Not limited. For example, after the surface treatment material is applied to the outer peripheral portion of the needle 2, the needle 2 may be inserted into the needle fixing portion 12, and then the needle 2 may be welded to the barrel 1.

斯かる構成においては、バレル１に針２を溶着する際に、バレル１が加熱され、さらに、斯かる熱が針２に伝達され、針２の外周部に塗布されている表面処理材が溶融する場合がある。そして、針２の先端側を上方に向けた状態で、溶融した表面処理材が硬化する際に、表面処理材が針固定部１２の先端に向けて垂れた場合であっても、凹状部１２１ａが表面処理材を収容できるため、針固定部１２の外周部に表面処理材が付着するのを防止できる。   In such a configuration, when the needle 2 is welded to the barrel 1, the barrel 1 is heated, and further, such heat is transmitted to the needle 2 to melt the surface treatment material applied to the outer peripheral portion of the needle 2. There is a case. Even when the surface treatment material hangs toward the tip of the needle fixing portion 12 when the melted surface treatment material is cured with the distal end side of the needle 2 facing upward, the concave portion 121a. Since the surface treatment material can be accommodated, the surface treatment material can be prevented from adhering to the outer peripheral portion of the needle fixing portion 12.

また、上記実施形態に係るプレフィルドシリンジにおいては、バレル１にプランジャ８（ガスケット８１及びプランジャロッド８２）が装着されている構成を説明したが、斯かる構成に限られない。例えば、プレフィルドシリンジは、バレル１の内部にガスケット８１だけが装着されている構成でもよい。   Moreover, in the prefilled syringe which concerns on the said embodiment, although the structure by which the plunger 8 (gasket 81 and plunger rod 82) was mounted | worn with the barrel 1 was demonstrated, it is not restricted to such a structure. For example, the prefilled syringe may have a configuration in which only the gasket 81 is mounted inside the barrel 1.

１…バレル、２…針、３…キャップ、４…バレル、５…バレル、８…プランジャ、１２…針固定部、１２ａ…溶着部、３０…キャップ、４２…針固定部、４２ａ…溶着部、５２…針固定部、５２ａ…溶着部、８１…ガスケット、８２…プランジャロッド、５２２…支持部、Ｘ…充填物   DESCRIPTION OF SYMBOLS 1 ... Barrel, 2 ... Needle, 3 ... Cap, 4 ... Barrel, 5 ... Barrel, 8 ... Plunger, 12 ... Needle fixing part, 12a ... Welding part, 30 ... Cap, 42 ... Needle fixing part, 42a ... Welding part, 52 ... Needle fixing part, 52a ... Welding part, 81 ... Gasket, 82 ... Plunger rod, 522 ... Support part, X ... Filling

Claims (5)

筒状に形成されるバレルと、バレルに固定される針とを備え、
バレルは、内部に挿入される針を固定する筒状の針固定部を先端部に備え、
針固定部は、熱可塑性を有し且つ加熱されることで針を溶着する溶着部を備える針付きバレルにおいて、
溶着部は、軸心方向において針固定部の先端から離間した位置に配置されることを特徴とする針付きバレル。 A barrel formed in a cylindrical shape, and a needle fixed to the barrel,
The barrel is provided with a cylindrical needle fixing portion for fixing a needle inserted therein at the tip portion,
In the barrel with a needle, the needle fixing part has thermoplasticity and is equipped with a welding part that welds the needle by being heated.
The barrel with a needle, wherein the welded portion is disposed at a position separated from the tip of the needle fixing portion in the axial direction. バレルは、溶着部が接触されるのを抑制すべく、溶着部を含む部位が凹状となるように形成される請求項１に記載の針付きバレル。   The barrel with a needle according to claim 1, wherein the barrel is formed so that a portion including the welded portion has a concave shape so as to suppress contact of the welded portion. 針固定部は、針の外周部と当接することで針を径方向で支持する支持部を備え、
溶着部は、軸心方向において針固定部の基端からも離間した位置に配置され、
支持部は、軸心方向において溶着部の両側の位置にそれぞれ配置される請求項１又は２に記載の針付きバレル。 The needle fixing part includes a support part that supports the needle in the radial direction by contacting the outer peripheral part of the needle,
The welded portion is disposed at a position spaced from the proximal end of the needle fixing portion in the axial direction,
The barrel with a needle according to claim 1 or 2, wherein the support portions are respectively disposed at positions on both sides of the weld portion in the axial direction. 針固定部は、先端部で且つ内周部に凹状部を備える請求項１〜３の何れか１項に記載の針付きバレル。   The barrel with a needle according to any one of claims 1 to 3, wherein the needle fixing portion includes a concave portion at a tip portion and an inner peripheral portion. 請求項１〜４の何れか１項に記載の針付きバレルと、バレルの内部に充填された充填物を封止すべくバレルの内部に挿入される弾性のガスケットとを備えることを特徴とするプレフィルドシリンジ。   A barrel with a needle according to any one of claims 1 to 4, and an elastic gasket inserted into the barrel to seal the filler filled in the barrel. Prefilled syringe.
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