JP7363022B2 - Nozzle member with valve body, discharge cap, and injection mold - Google Patents

Nozzle member with valve body, discharge cap, and injection mold Download PDF

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JP7363022B2
JP7363022B2 JP2018202447A JP2018202447A JP7363022B2 JP 7363022 B2 JP7363022 B2 JP 7363022B2 JP 2018202447 A JP2018202447 A JP 2018202447A JP 2018202447 A JP2018202447 A JP 2018202447A JP 7363022 B2 JP7363022 B2 JP 7363022B2
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valve body
nozzle
mold
nozzle member
molding
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JP2020070021A (en
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夏生 桝屋
哲也 本田
大介 竹内
美子 村屋
宏明 杉岡
条 本田
圭介 森
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Toyo Seikan Kaisha Ltd
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Description

本発明は、キャップ本体に取り付けられるノズル状の部材であって、キャップ本体に設けられた吐出孔を開閉可能な弁体を有する弁体付ノズル部材、及び当該弁体付ノズル部材を備えた吐出キャップ、並びに当該弁体付ノズル部材を成形するための射出成形型に関する。 The present invention relates to a nozzle-shaped member attached to a cap body, and a nozzle member with a valve body having a valve body that can open and close a discharge hole provided in the cap body, and a discharge nozzle member equipped with the nozzle member with a valve body. The present invention relates to an injection mold for molding a cap and a nozzle member with a valve body.

従来、弾性変形可能な外容器と、内容物の減少に伴って収縮変形する内容器とからなる二重構造の吐出容器が知られている(例えば、特許文献1参照)。
そして、このような吐出容器にあっては、内容器内への空気の侵入を抑制して、内容物の品質を保持するために、容器本体を圧搾して内容物を吐出させる際に吐出孔を開放し、内容物を吐出させた後は吐出孔を閉塞する逆止弁機能を備えた吐出キャップが用いられている。
BACKGROUND ART Conventionally, a dual-structured discharge container is known that includes an elastically deformable outer container and an inner container that contracts and deforms as the contents decrease (see, for example, Patent Document 1).
In such a dispensing container, in order to suppress the intrusion of air into the inner container and maintain the quality of the contents, the dispensing hole is closed when squeezing the container body to discharge the contents. A discharge cap is used that has a check valve function that closes the discharge hole after opening the discharge hole and discharging the contents.

特開2014-91525号公報JP2014-91525A

ところで、特許文献1が開示する吐出容器に用いられる吐出キャップは、吐出孔が穿設された中栓を容器本体の口部に嵌合し、かかる中栓を覆って容器本体の口部に装着されるキャップ本体との間に、中栓に穿設された吐出孔を開閉する弁体が形成された部材を介在させることによって構成されている。 By the way, the discharge cap used for the discharge container disclosed in Patent Document 1 is such that an inner stopper with a discharge hole is fitted into the mouth of the container body, and the inner stopper is covered and attached to the mouth of the container body. A member having a valve body for opening and closing a discharge hole formed in the inner stopper is interposed between the inner stopper and the cap body.

このような吐出キャップは、通常、射出成形によって製造されるため、その形状などを設計するに際しては、型開きを考慮して設計することが求められる。上述した吐出キャップは、三つの部材からなっており、それぞれの部材が型開きを考慮して設計されているが、部材数が少なくなれば、その組立や部材の管理などに要する手間を軽減することができる。 Such a discharge cap is usually manufactured by injection molding, so when designing its shape etc., it is required to take mold opening into consideration. The above-mentioned discharge cap is made up of three parts, each of which is designed with mold opening in mind, but if the number of parts is reduced, the effort required for assembly and management of the parts will be reduced. be able to.

そこで、本発明者らは、内容物を吐出させる吐出孔を開閉する逆止弁機能を備えた吐出キャップを、より少ない部材数で構成するべく鋭意検討を重ねた結果、本発明を完成するに至った。 Therefore, the inventors of the present invention have conducted intensive studies to construct a discharge cap equipped with a check valve function that opens and closes a discharge hole for discharging the contents using fewer parts, and as a result, they have completed the present invention. It's arrived.

本発明に係る弁体付ノズル部材は、ノズル本体に、弾性連結片を介して弁体が連結された弁体付ノズル部材であって、前記ノズル本体の内周面を成形するコア部を含む第一型と、挿入された前記コア部との間で、前記弁体と前記弾性連結片とが成形される凹部を含む第二型とを備え、前記第一型と前記第二型との間に、前記弁体付ノズル部材を成形するキャビティが形成され、前記第一型の前記コア部の外周面と、前記第二型の前記凹部の内周面とに、両者の間で、前記弾性連結片を成形する弾性連結片成形部が刻設された射出成形型を用いて射出成形され、前記弾性連結片が、前記弁体に向かって、前記ノズル本体の内周面と面一に、かつ、垂直に垂下する本体側接続部と、前記ノズル本体に向かって、前記弁体の外周面と面一に、かつ、垂直に立ち上る弁体側接続部と、前記本体側接続部と前記弁体側接続部とに接続される連結部とを有し、前記連結部の内径が、前記ノズル本体の内周面の内径と等しく、前記連結部の外径が、前記弁体の外径よりも大きく、前記弁体の外径が、前記ノズル本体の内径以下である構成としてある。 A nozzle member with a valve body according to the present invention is a nozzle member with a valve body in which a valve body is connected to a nozzle body via an elastic connecting piece, and includes a core portion that forms an inner circumferential surface of the nozzle body. a second mold including a recess in which the valve body and the elastic connecting piece are molded between the first mold and the inserted core part; A cavity for molding the nozzle member with a valve body is formed between the outer circumferential surface of the core portion of the first type and the inner circumferential surface of the recessed portion of the second type. The elastic connecting piece is injection molded using an injection mold in which an elastic connecting piece molding part is carved, and the elastic connecting piece is flush with the inner circumferential surface of the nozzle body toward the valve body. , and a main body side connection part that hangs down vertically , a valve body side connection part that rises vertically toward the nozzle body flush with the outer peripheral surface of the valve body, and the main body side connection part and the valve body side connection part. a connecting part connected to the body side connecting part, the inner diameter of the connecting part is equal to the inner diameter of the inner circumferential surface of the nozzle body, and the outer diameter of the connecting part is smaller than the outer diameter of the valve body . The outer diameter of the valve body is larger than the inner diameter of the nozzle body.

また、本発明に係る吐出キャップは、上記弁体付ノズル部材が取り付けられたキャップ本体と、前記キャップ本体に着脱可能な上蓋とを備える吐出キャップであって、前記キャップ本体には、前記弁体付ノズル部材が取り付けられるノズル取着部が設けられており、前記ノズル取着部に形成された弁体収容部の底部に吐出孔が穿設され、当該吐出孔の周縁部が、前記弁体収容部に収容された前記弁体が接離する弁座として機能するように形成されている構成としてある。 Further, a discharge cap according to the present invention is a discharge cap including a cap body to which the nozzle member with a valve body is attached, and an upper lid that is removably attached to the cap body, wherein the cap body includes the valve body. A nozzle attachment part to which a nozzle member is attached is provided, a discharge hole is bored in the bottom of a valve body housing part formed in the nozzle attachment part, and a peripheral edge of the discharge hole is connected to the valve body. The valve body accommodated in the accommodation portion is configured to function as a valve seat that moves toward and away from the valve body.

また、本発明に係る射出成形型は上記弁体付ノズル部材を成形するための射出成形型であFurther, an injection molding mold according to the present invention is an injection molding mold for molding the above-mentioned nozzle member with a valve body.

かかる射出成形型は、円柱状のコア部を含む第一型と、前記コア部が挿入される凹部を含む第二型とを備え、型締めした前記第一型と前記第二型との間に、前記弁体付ノズル部材を成形するキャビティが形成され、前記コア部は、前記ノズル本体の内周面側を成形するとともに、前記凹部との間で、前記弁体と前記弾性連結片とが成形されるように、前記凹部の底側に、前記コア部の頂面との間で、前記弁体を成形する弁体成形部が刻設され、前記コア部の頂面側の外周面に、前記凹部の内周面との間で、前記弁体側接続部を成形する弁体側接続部成形部が刻設され、前記凹部の内周面に、前記コア部の外周面との間で、前記本体側接続部を成形する本体側接続部成形部と、前記弾性連結片の前記連結部を成形する連結部成形部が刻設されている構成としてある。 Such an injection mold includes a first mold including a cylindrical core portion, and a second mold including a recess into which the core portion is inserted, and a gap between the first mold and the second mold which are clamped. A cavity is formed in which the nozzle member with a valve body is molded, and the core part molds the inner peripheral surface side of the nozzle body and connects the valve body and the elastic connecting piece with the recess. A valve body molding part for molding the valve body is carved on the bottom side of the recessed part between the top surface of the core part and the outer circumferential surface on the top surface side of the core part. A valve body side connection part molding part for forming the valve body side connection part is carved between the inner peripheral surface of the recess and the outer peripheral surface of the core part. , a main body side connecting portion molding portion for molding the main body side connecting portion and a connecting portion molding portion for molding the connecting portion of the elastic connecting piece are carved.

本発明によれば、内容物を吐出させる吐出孔を開閉する逆止弁機能を備えた吐出キャップを、より少ない部材数で構成することができる。 According to the present invention, a discharge cap equipped with a check valve function that opens and closes a discharge hole for discharging contents can be constructed using a smaller number of members.

本発明の実施形態に係る吐出キャップの概略を示す正面図である。FIG. 1 is a front view schematically showing a discharge cap according to an embodiment of the present invention. 図1のA-A断面図である。2 is a sectional view taken along line AA in FIG. 1. FIG. 本発明の本実施形態に係る弁体付ノズル部材の概略を示す平面図である。FIG. 2 is a plan view schematically showing a nozzle member with a valve body according to the present embodiment of the present invention. 本発明の本実施形態に係る弁体付ノズル部材の概略を示す正面図である。FIG. 2 is a front view schematically showing a nozzle member with a valve body according to the present embodiment of the present invention. 本発明の本実施形態に係る弁体付ノズル部材の概略を示す底面図である。It is a bottom view showing an outline of a nozzle member with a valve body concerning this embodiment of the present invention. 本発明の本実施形態に係る弁体付ノズル部材の概略を示す斜視図である。It is a perspective view showing an outline of a nozzle member with a valve body concerning this embodiment of the present invention. 図3のB-B断面図である。4 is a sectional view taken along line BB in FIG. 3. FIG. 本発明の本実施形態に係る射出成形型の概略を示す断面図である。1 is a cross-sectional view schematically showing an injection mold according to an embodiment of the present invention. 本発明の本実施形態に係る射出成形型に用いる凹部型の一例を示す斜視図である。FIG. 2 is a perspective view showing an example of a recessed mold used in the injection molding mold according to the present embodiment of the present invention. 図9に示す凹部型と対比される凹部型の例を示す斜視図である。FIG. 10 is a perspective view showing an example of a recess mold in contrast to the recess mold shown in FIG. 9; 本発明の本実施形態に係る弁体付ノズル部材の変形例を備える吐出キャプの概略を示す断面図である。It is a sectional view showing an outline of a discharge cap provided with a modification of a nozzle member with a valve body according to the present embodiment of the present invention. 本発明の本実施形態に係る弁体付ノズル部材の変形例の概略を示す平面図である。It is a top view which shows the outline of the modification of the nozzle member with a valve body based on this embodiment of this invention. 本発明の本実施形態に係る弁体付ノズル部材の変形例の概略を示す正面図である。It is a front view showing the outline of the modification of the nozzle member with a valve body concerning this embodiment of the present invention. 本発明の本実施形態に係る弁体付ノズル部材の変形例の概略を示す底面図である。It is a bottom view showing the outline of the modification of the nozzle member with a valve body concerning this embodiment of the present invention. 本発明の本実施形態に係る弁体付ノズル部材の変形例の概略を示す斜視図である。It is a perspective view showing the outline of the modification of the nozzle member with a valve body concerning this embodiment of the present invention. 図12のC-C断面図である。13 is a sectional view taken along the line CC in FIG. 12. FIG. 本発明の本実施形態に係る射出成形型の変形例の概略を示す断面図である。It is a sectional view showing an outline of a modification of an injection molding die concerning this embodiment of the present invention.

以下、本発明の実施形態について、図面を参照しつつ説明する。 Embodiments of the present invention will be described below with reference to the drawings.

[吐出キャップ]
本実施形態における吐出キャップ1は合成樹脂からなり、キャップ本体2と、キャップ本体2に着脱可能な上蓋3とが、ヒンジ4で連結された、いわゆるヒンジキャップに本発明を適用した例であって、容器本体100の口部101に装着して用いられる。
[Discharge cap]
The discharge cap 1 in this embodiment is made of synthetic resin, and is an example in which the present invention is applied to a so-called hinge cap in which a cap body 2 and an upper lid 3 that is removably attached to the cap body 2 are connected by a hinge 4. , and is used by being attached to the opening 101 of the container body 100.

ここで、図1は、キャップ本体2に上蓋3を嵌着した状態を示す正面図、図2は、図1のA-A断面図であり、吐出キャップ1を構成する各部材についての上下左右及び縦横の方向は、図2に示す状態で規定される方向とする。
なお、図2において、部材どうしが重なって図示されている部分は、実際には、弾性変形して互いに密着した状態で嵌合されている。容器本体100の口部101の断面については、一部を省略するとともに、断面を示すハッチングを省略してある。
Here, FIG. 1 is a front view showing a state in which the upper lid 3 is fitted to the cap body 2, and FIG. 2 is a sectional view taken along the line AA in FIG. The vertical and horizontal directions are defined in the state shown in FIG.
In addition, in FIG. 2, the parts shown as overlapping members are actually elastically deformed and fitted into each other in close contact with each other. Regarding the cross section of the mouth portion 101 of the container body 100, a part is omitted and hatching indicating the cross section is omitted.

本実施形態において、図2に示すように、キャップ本体2は、本体天面部20の外周縁に沿って垂下する外側筒部21と、その内側に同心状に垂下する内側筒部22とを有している。そして、吐出キャップ1を容器本体100の口部101に装着した際に、内側筒部22が、容器本体100の口部101の内周面に液密に嵌合するようになっている。 In this embodiment, as shown in FIG. 2, the cap main body 2 has an outer cylinder part 21 that hangs down along the outer peripheral edge of the main body top part 20, and an inner cylinder part 22 that hangs concentrically inside the outer cylinder part 21. are doing. When the discharge cap 1 is attached to the mouth part 101 of the container body 100, the inner cylinder part 22 is adapted to fit into the inner peripheral surface of the mouth part 101 of the container body 100 in a fluid-tight manner.

また、外側筒部21の内周面にはネジ部が形成されており、吐出キャップ1を螺着によって、容器本体100の口部101に装着するようにしているが、これに限定されない。吐出キャップ1の装着手段は、吐出キャップ1を容器本体100の口部101に液密に装着できれば、例えば、打栓によって装着されるように構成してもよい。 Further, a threaded portion is formed on the inner circumferential surface of the outer cylinder portion 21, and the discharge cap 1 is screwed onto the mouth portion 101 of the container body 100, but the present invention is not limited thereto. As long as the discharge cap 1 can be attached to the mouth 101 of the container body 100 in a liquid-tight manner, the attachment means for the discharge cap 1 may be configured to be attached by plugging, for example.

また、キャップ本体2には、内側筒部22よりも内側に位置する部位に、ノズル取着部23が設けられている。このノズル取着部23には、内容物を吐出する際の流路を形成するノズル本体51に、弾性連結片53を介して弁体52を連結してなる弁体付ノズル部材5が取り付けられるが、弁体付ノズル部材5の詳細については後述する。 Further, the cap body 2 is provided with a nozzle attachment portion 23 at a portion located inside the inner cylinder portion 22. A nozzle member 5 with a valve body is attached to the nozzle attachment portion 23, which is formed by connecting a valve body 52 via an elastic connecting piece 53 to a nozzle body 51 that forms a flow path for discharging the contents. However, details of the nozzle member 5 with a valve body will be described later.

キャップ本体2に設けられたノズル取着部23には、弁体付ノズル部材5の弁体52が収容される弁体収容部24が、本体天面部20から逆円錐台状に陥没するようにして形成されているとともに、弁体付ノズル部材5のノズル本体51が液密に嵌合する嵌合部25が、弁体収容部24の開口縁に沿って筒状に立ち上るようにして形成されている。 In the nozzle attachment part 23 provided on the cap body 2, a valve body accommodating part 24 in which the valve body 52 of the nozzle member with a valve body 5 is accommodated is configured to recess from the body top surface part 20 in the shape of an inverted truncated cone. The fitting portion 25 into which the nozzle body 51 of the nozzle member 5 with a valve body is liquid-tightly fitted is formed in a cylindrical shape rising along the opening edge of the valve body housing portion 24. ing.

また、ノズル取着部23に形成された弁体収容部24の底部には、内容物を吐出させる吐出孔26が穿設されており、この吐出孔26の周縁部が、弁体収容部24に収容された弁体52が離接する弁座として機能するように形成されている。
これにより、容器本体100を圧搾すると、内容物が弁体52を押し上げることによって吐出孔26が開放され、吐出孔26を通ってノズル本体51の先端開口部から内容物を吐出させることができる。そして、容器本体100を圧搾する力を弱めると、弁体52が元の状態に戻り、弾性連結片53の弾性力によって吐出孔26の周縁部に圧接されて、吐出孔26を再び閉塞する逆止弁として機能する。
Further, a discharge hole 26 for discharging the contents is bored in the bottom of the valve body housing part 24 formed in the nozzle attachment part 23, and the peripheral edge of this discharge hole 26 is formed in the valve body housing part 24. The valve body 52 housed in the valve body 52 is formed to function as a valve seat that moves toward and away from the valve body 52 .
Thereby, when the container body 100 is squeezed, the contents push up the valve body 52, thereby opening the discharge hole 26, and the contents can be discharged from the tip opening of the nozzle body 51 through the discharge hole 26. Then, when the force for squeezing the container body 100 is weakened, the valve body 52 returns to its original state and is pressed against the peripheral edge of the discharge hole 26 by the elastic force of the elastic connecting piece 53, causing the discharge hole 26 to be closed again. Functions as a stop valve.

なお、本実施形態では、ノズル本体51の先端開口部から内容物を吐出させる際の操作性を考慮して、キャップ本体2の中心から、キャップ本体2に上蓋3を連結するヒンジ4から離れる方向に外れた位置に、ノズル取着部23を設けている。
また、キャップ本体2の本体天面部20の外周縁には、上蓋3の下端縁部が着脱可能に嵌合する嵌合段部27が形成されている。さらに、キャップ本体2の本体天面部20には、ノズル取着部23よりも外側となる位置に、周方向に沿って段部28が形成されているとともに、上蓋3には、キャップ本体2に嵌着した際に、本体天面部20に形成された段部28に嵌合するように筒状に垂下する支持部30と、ノズル本体51の先端開口部を封止する封止部31が形成されている。
Note that in this embodiment, in consideration of operability when discharging the contents from the tip opening of the nozzle body 51, the direction away from the hinge 4 that connects the upper lid 3 to the cap body 2 from the center of the cap body 2 is A nozzle attachment part 23 is provided at a position separated from the main body.
Further, a fitting stepped portion 27 is formed on the outer peripheral edge of the main body top surface portion 20 of the cap main body 2, into which the lower end edge portion of the upper lid 3 is removably fitted. Furthermore, a stepped portion 28 is formed along the circumferential direction on the top surface portion 20 of the cap body 2 at a position outside the nozzle attachment portion 23, and on the top lid 3, a stepped portion 28 is formed on the top surface portion 20 of the cap body 2. When fitted, a supporting part 30 that hangs down in a cylindrical shape so as to fit into the step part 28 formed on the top surface part 20 of the main body, and a sealing part 31 that seals the tip opening of the nozzle main body 51 are formed. has been done.

[弁体付ノズル部材]
図3~図7に示す弁体付ノズル部材5は、内容物を吐出する際の流路を形成するノズル本体51に、弾性連結片53を介して弁体52が連結されたノズル状の部材であるのは、前述した通りである。ノズル本体51は、例えば、内径が3~8mmの筒状に形成されるが、内容物を吐出する際の流路を形成する上で支障がなければ、ノズル本体51の内径は、特に限定されない。
[Nozzle member with valve body]
The nozzle member 5 with a valve body shown in FIGS. 3 to 7 is a nozzle-shaped member in which a valve body 52 is connected via an elastic connecting piece 53 to a nozzle body 51 that forms a flow path for discharging the contents. This is as mentioned above. The nozzle body 51 is, for example, formed in a cylindrical shape with an inner diameter of 3 to 8 mm, but the inner diameter of the nozzle body 51 is not particularly limited as long as it does not interfere with forming a flow path when discharging the contents. .

本実施形態において、ノズル本体51には、その外周面から断面L字状に張り出して、ノズル本体51の基端側に垂下する環状嵌合部51aが設けられている。
このような環状嵌合部51aを設けることによって、ノズル取着部23に形成された嵌合部25にノズル本体51を嵌合した際に、当該嵌合部25がノズル本体51の外周面と環状嵌合部51aの間に挟持されるようにしている。そして、かかる環状嵌合部51aの下端側に形成された嵌合突部と、ノズル取着部23に形成された嵌合部25の先端側に形成された嵌合突部とが、互いに噛み合うことによって、ノズル取着部23に取り付けられた弁体付ノズル部材5が、より脱離し難くなるようにしているが、環状嵌合部51aは必要に応じて省略してもよい。
In this embodiment, the nozzle body 51 is provided with an annular fitting portion 51a that protrudes from the outer circumferential surface of the nozzle body 51 and has an L-shaped cross section and hangs down toward the base end side of the nozzle body 51.
By providing such an annular fitting part 51a, when the nozzle main body 51 is fitted into the fitting part 25 formed in the nozzle attachment part 23, the fitting part 25 is connected to the outer peripheral surface of the nozzle main body 51. He is trying to hold it between the annular fitting parts 51a. Then, the fitting protrusion formed on the lower end side of the annular fitting part 51a and the fitting protrusion formed on the distal end side of the fitting part 25 formed on the nozzle attachment part 23 mesh with each other. This makes it more difficult for the nozzle member 5 with a valve body attached to the nozzle attachment part 23 to come off, but the annular fitting part 51a may be omitted if necessary.

このようなノズル本体51に、弾性連結片53を介して連結される弁体52は、その周縁に沿って、弾性連結片53が接続する側とは反対側に環状に突出する周壁部52aを有しており、この周壁部52aが吐出孔26の周縁部と接触することによって吐出孔26を閉塞する。この際、周壁部52aが弾性変形し易くなるように、周壁部52aの内周側には、周壁部52aの内周に沿って環状溝52bが形成されている。
なお、周壁部52a、環状溝52bは適宜省略してもよい。
The valve body 52 connected to such a nozzle main body 51 via the elastic connection piece 53 has a peripheral wall part 52a that protrudes annularly along its periphery on the side opposite to the side to which the elastic connection piece 53 is connected. The peripheral wall portion 52a closes the discharge hole 26 by coming into contact with the peripheral edge of the discharge hole 26. At this time, an annular groove 52b is formed on the inner circumferential side of the circumferential wall 52a along the inner circumference of the circumferential wall 52a so that the circumferential wall 52a can be easily elastically deformed.
Note that the peripheral wall portion 52a and the annular groove 52b may be omitted as appropriate.

これによって、弾性連結片53の限られた弾性力によって弁体52が吐出孔26の周縁部に圧接されたときに、周壁部52aが吐出孔26の周縁部により液密に密着した状態で、吐出孔26を閉塞することができる。このとき、周壁部52aを吐出孔26の周縁部により良好に密着させることができるように、弁体収容部24の内周面の傾斜に合わせて、周壁部52aの先端側の外周面をテーパー状に切り欠くのが好ましい。 As a result, when the valve body 52 is pressed against the peripheral edge of the discharge hole 26 due to the limited elastic force of the elastic connecting piece 53, the peripheral wall 52a is in liquid-tight contact with the peripheral edge of the discharge hole 26. The discharge hole 26 can be closed. At this time, the outer circumferential surface of the distal end side of the circumferential wall 52a is tapered in accordance with the slope of the inner circumferential surface of the valve body housing part 24 so that the circumferential wall 52a can be brought into better contact with the circumferential edge of the discharge hole 26. It is preferable to cut out the shape.

また、弁体52の外径は、成形後の型開きを考慮して、ノズル本体51の内径以下となるように設計するが、これについては後述する。 Further, the outer diameter of the valve body 52 is designed to be equal to or smaller than the inner diameter of the nozzle body 51 in consideration of mold opening after molding, but this will be described later.

このような弁体52をノズル本体51に連結する弾性連結片53は、ノズル本体51側に設けられた本体側接続部53aと、弁体52側に設けられた弁体側接続部53bと、本体側接続部53aと弁体側接続部53bとに接続される連結部53cとを有している。そして、本体側接続部53aは、弁体52に向かって、ノズル本体51の内周面と面一に垂下するように形成されており、弁体側接続部53bは、ノズル本体51に向かって、周壁部52aの外周面と面一に立ち上るように形成されている。
このようにすることで、連結部53cが弾性連結片53の可動部として機能し、弾性連結片53を変形し易く、かつ、復元し易くなるように構成することができる。その結果、吐出孔26を開閉する際の弁体52の動きがスムーズになり、内容物を良好に吐出させることができ、吐出後は良好に吐出孔26を閉塞することができる。
The elastic connecting piece 53 that connects the valve body 52 to the nozzle body 51 has a body side connecting portion 53a provided on the nozzle body 51 side, a valve body side connecting portion 53b provided on the valve body 52 side, and a body side connecting portion 53b provided on the valve body 52 side. It has a connecting portion 53c connected to the side connecting portion 53a and the valve body side connecting portion 53b. The main body side connecting portion 53a is formed to hang flush with the inner circumferential surface of the nozzle body 51 toward the valve body 52, and the valve body side connecting portion 53b is formed so as to hang toward the nozzle body 51. It is formed to rise flush with the outer peripheral surface of the peripheral wall portion 52a.
By doing so, the connecting portion 53c functions as a movable portion of the elastic connecting piece 53, and the elastic connecting piece 53 can be configured to be easily deformed and restored. As a result, the movement of the valve body 52 when opening and closing the discharge hole 26 becomes smooth, the contents can be discharged well, and the discharge hole 26 can be closed well after discharge.

成形後の型開きを考慮すると、本体側接続部53aは、弁体52に向かって垂直に垂下するように形成するのが好ましく、弁体側接続部53bは、ノズル本体51に向かって垂直に立ち上るように形成するのが好ましいが、これについては後述する。 Considering the mold opening after molding, it is preferable that the main body side connecting portion 53a is formed to hang vertically toward the valve body 52, and the valve body side connecting portion 53b is formed to vertically rise toward the nozzle body 51. It is preferable to form it as follows, but this will be described later.

このような態様で弾性連結片53を形成する場合、吐出孔26の周縁部に弁体52を圧接する弾性力を確保する上で、本体側接続部53aと弁体側接続部53bとは、捩れ角(中心軸Cを含み本体側接続部53aの周方向中央を通る平面と、中心軸Cを含み弁体側接続部53bの周方向中央を通る平面との二面角)αが40~80°となるように配置され、これらに接続される連結部53cが、中心軸Cに対する傾きβが50~70°の螺旋状に形成されるようにするのが好ましい。 When forming the elastic connecting piece 53 in such a manner, in order to ensure the elastic force that presses the valve body 52 against the peripheral edge of the discharge hole 26, the main body side connecting portion 53a and the valve body side connecting portion 53b are twisted. Angle (dihedral angle between a plane that includes the center axis C and passes through the circumferential center of the main body side connection portion 53a and a plane that includes the center axis C and passes through the circumferential center of the valve body side connection portion 53b) α is 40 to 80° It is preferable that the connecting portion 53c connected thereto is formed in a spiral shape with an inclination β of 50 to 70° with respect to the central axis C.

捩れ角αと傾きβが上記範囲に満たない場合、連結部53cが垂直に近づいてしまうことから、内容物が弁体52を押し上げる際に、弾性連結片53が弾性変形し難くなり、吐出孔26の開放が妨げられて、内容物を吐出させるのに十分な流路が確保できなくなってしまう傾向がある。一方、上記範囲を超える場合、連結部53cが水平に近づいてしまうことから、弾性連結片53が弾性変形し易くなり、弁体52が吐出孔26を閉塞するのに十分な弾性力が得られずに、シール性が低下してしまう傾向にある。また、後述するように、連結部53cはアンダーカットとなるが、連結部53cが水平に近づいてしまうと、その型開き方向に直交する面への投影面積が増えてしまうため、無理抜きに際して連結部53cへの負荷が増加してしまう傾向にあり、著しい場合には、変形や破断が生じかねない。 If the torsion angle α and the inclination β are less than the above ranges, the connecting portion 53c approaches vertically, making it difficult for the elastic connecting piece 53 to deform elastically when the contents push up the valve body 52, and the discharge hole 26 tends to be prevented from opening, making it impossible to secure a sufficient flow path for discharging the contents. On the other hand, if the above range is exceeded, the connecting portion 53c becomes close to horizontal, so that the elastic connecting piece 53 is likely to be elastically deformed, and sufficient elastic force for the valve body 52 to close the discharge hole 26 cannot be obtained. However, the sealing performance tends to deteriorate. In addition, as will be described later, the connecting portion 53c becomes an undercut, but if the connecting portion 53c becomes close to horizontal, its projected area on the plane perpendicular to the mold opening direction increases, so it is difficult to connect the connecting portion during forced punching. There is a tendency for the load on the portion 53c to increase, and in severe cases, deformation or breakage may occur.

なお、図示する例では、ノズル本体51に、三つの弾性連結片53を介して弁体52を連結しているが、吐出孔26の周縁部に弁体52を圧接する弾性力が十分に得られ、かつ、吐出孔26の周縁部に弁体52をバランスよく圧接することができれば、これに限定されない。 In the illustrated example, the valve body 52 is connected to the nozzle body 51 via three elastic connecting pieces 53, but it is necessary to obtain sufficient elastic force to press the valve body 52 against the peripheral edge of the discharge hole 26. The present invention is not limited to this, as long as the valve body 52 can be pressed against the peripheral edge of the discharge hole 26 in a well-balanced manner.

このように、弁体付ノズル部材5は、内容物を吐出する際の流路を形成するノズル本体51に、キャップ本体2に設けられた吐出孔26を開閉可能な弁体52が一体に形成されているため、本実施形態によれば、内容物を吐出させる吐出孔26を開閉する逆止弁機能を備えた吐出キャップ1を、より少ない部材数で構成することができる。 As described above, in the nozzle member 5 with a valve body, the valve body 52 that can open and close the discharge hole 26 provided in the cap body 2 is integrally formed with the nozzle body 51 that forms a flow path when discharging the contents. Therefore, according to the present embodiment, the discharge cap 1 having a check valve function for opening and closing the discharge hole 26 for discharging the contents can be configured with a smaller number of members.

このような弁体付ノズル部材5は、例えば、図8に示すような射出成形型6を用いて成形することができる。 Such a nozzle member 5 with a valve body can be molded using an injection mold 6 as shown in FIG. 8, for example.

図8に示す射出成形型は、円柱状のコア部62を含む第一型61と、コア部62が挿入される凹部66を含む第二型65とを備えている。そして、型締めした第一型61と第二型65との間に、弁体付ノズル部材5を成形するキャビティが形成されるようにしている。
さらに、図示する例では、成形後の型開きを考慮して、第一型61が、コア部62が形成されたコア型64と第一ベース型63とからなり、第二型65が、凹部66が形成された凹部型68と第二ベース型67とからなる型構造としている。
なお、図示する射出成形型6は一例であり、必要に応じて、さらに分割された型構造としてもよい。
The injection mold shown in FIG. 8 includes a first mold 61 including a cylindrical core portion 62 and a second mold 65 including a recess 66 into which the core portion 62 is inserted. A cavity for molding the nozzle member 5 with a valve body is formed between the clamped first mold 61 and second mold 65.
Furthermore, in the illustrated example, in consideration of mold opening after molding, the first mold 61 is made up of a core mold 64 in which a core part 62 is formed and a first base mold 63, and the second mold 65 is made up of a recessed part. The mold structure is made up of a concave mold 68 in which 66 is formed and a second base mold 67.
Note that the illustrated injection mold 6 is only an example, and the mold structure may be further divided as necessary.

第一型61のコア部62は、ノズル本体51の内周面側を成形するとともに、第二型65の凹部66との間で、弁体52と弾性連結片53とが成形されるように構成されており、第二型65の凹部66の底側には、第一型61のコア部62の頂面との間で、弁体52を成形する弁体成形部M52が刻設されている。そして、第一型61のコア部62の頂面側の外周面には、第二型65の凹部66の内周面との間で、弾性連結片53の弁体側接続部53bを成形する弁体側接続部成形部M53bが刻設されているとともに、第二型65の凹部66の内周面には、第一型61のコア部62の外周面との間で、弾性連結片53の本体側接続部53aを成形する本体側接続部成形部M53aと、弾性連結片53の連結部53cを成形する連結部成形部M53cが刻設されている。 The core part 62 of the first mold 61 molds the inner circumferential surface side of the nozzle body 51, and the valve body 52 and the elastic connecting piece 53 are molded between the core part 62 and the recess 66 of the second mold 65. A valve body forming part M52 for forming the valve body 52 is carved on the bottom side of the recessed part 66 of the second mold 65 between it and the top surface of the core part 62 of the first mold 61. There is. The valve body side connecting portion 53b of the elastic connecting piece 53 is formed between the outer peripheral surface of the top surface side of the core portion 62 of the first mold 61 and the inner peripheral surface of the recess 66 of the second mold 65. A body side connecting portion molding portion M53b is carved, and the main body of the elastic connecting piece 53 is formed on the inner peripheral surface of the recess 66 of the second mold 65 between it and the outer peripheral surface of the core portion 62 of the first mold 61. A main body side connecting portion molding portion M53a for molding the side connecting portion 53a and a connecting portion molding portion M53c for molding the connecting portion 53c of the elastic connecting piece 53 are carved.

このような射出成形型6を用いて弁体付ノズル部材5を射出成形するには、第二型65の凹部66の底側中央に配設された、図示しないゲートからキャビティ内に溶融樹脂を射出充填する。
そして、型開きに際しては、まず、第一型61を型開き方向にスライドさせるが、このとき、弁体52に形成された周壁部52aの外径をノズル本体51の内径以下とすることで、成形されたノズル本体51と干渉することなく、コア部62を引き抜くことが可能になる。さらに、弁体側接続部53bをノズル本体51に向かって垂直に立ち上るように形成するのが好ましいのは前述した通りであり、このようにすることで、コア部62を引き抜く際の弁体側接続部53bへの負荷をより低減することができる。
また、第一型61をコア型64と第一ベース型63とからなる型構造として、コア型64、第一ベース型63の順に型開き方向にスライドさせることで、成形された弁体付ノズル部材5への負荷がより低減されるようにすることができる。
In order to injection mold the nozzle member 5 with a valve body using such an injection mold 6, molten resin is introduced into the cavity through a gate (not shown) disposed at the center of the bottom side of the recess 66 of the second mold 65. Injection filling.
When opening the mold, first, the first mold 61 is slid in the mold opening direction, but at this time, by making the outer diameter of the peripheral wall portion 52a formed on the valve body 52 equal to or smaller than the inner diameter of the nozzle body 51, It becomes possible to pull out the core portion 62 without interfering with the molded nozzle body 51. Furthermore, as described above, it is preferable to form the valve body side connection part 53b so as to rise vertically toward the nozzle body 51, and by doing so, the valve body side connection part 53b is formed when the core part 62 is pulled out. The load on 53b can be further reduced.
Further, the first mold 61 has a mold structure consisting of a core mold 64 and a first base mold 63, and by sliding the core mold 64 and the first base mold 63 in the mold opening direction in this order, a molded nozzle with a valve body is formed. The load on the member 5 can be further reduced.

また、図示する例では、凹部型68とともに第二型65を構成する第二ベース型67のパーティング面が、ノズル本体51に設けた環状嵌合部51aの下端面に位置するようにしている。このような型構造とすることで、凹部型68に対して第二ベース型67を型開き方向にスライドさせることで、成形された弁体付ノズル部材5をイジェクトできるようにしている。これにより、イジェクトピン等のイジェクト機構を設ける必要がなくなるため、射出成形型6の型構造をより簡略化することが可能になる。 Further, in the illustrated example, the parting surface of the second base mold 67 that constitutes the second mold 65 together with the concave mold 68 is located at the lower end surface of the annular fitting part 51a provided in the nozzle body 51. . With such a mold structure, by sliding the second base mold 67 in the mold opening direction with respect to the concave mold 68, the molded nozzle member 5 with a valve body can be ejected. This eliminates the need to provide an eject mechanism such as an eject pin, so that the structure of the injection mold 6 can be further simplified.

また、前述したように、本体側接続部53aを弁体52に向かって垂直に垂下するように形成するのが好ましく、このようにすることで、成形された弁体付ノズル部材5をイジェクトする際の本体側接続部53aへの負荷を低減するとともに、アンダーカットとなる連結部53cの無理抜きも良好に行うことができる。 Further, as described above, it is preferable to form the main body side connecting portion 53a so as to hang vertically toward the valve body 52. By doing so, the molded nozzle member 5 with a valve body can be ejected. At the same time, the load on the main body side connecting portion 53a can be reduced, and the undercut connecting portion 53c can be easily removed.

さらに、本体側接続部53aを弁体52に向かって垂直に垂下するように形成することで、第二型65の凹部66の内周面に刻設する本体側接続部成形部M53aに、損傷し易い鋭角な部分がなくなり、その耐久性を高めることも可能になる。
なお、図9は、本実施形態で用いる凹部型68の一例を示す斜視図であり、これとの対比のために、本体側接続部53aを省略して連結部53cをノズル本体51に接続した場合の凹部型の例を図10に示す。
Furthermore, by forming the main body side connecting portion 53a so as to hang vertically toward the valve body 52, damage to the main body side connecting portion molded portion M53a carved on the inner peripheral surface of the recess 66 of the second mold 65 can be avoided. There are no sharp edges that can easily break, and it is also possible to increase its durability.
Note that FIG. 9 is a perspective view showing an example of the concave mold 68 used in this embodiment, and for comparison with this, the main body side connecting part 53a is omitted and the connecting part 53c is connected to the nozzle main body 51. FIG. 10 shows an example of the recessed part type in this case.

[変形例]
また、本実施形態では、前述したような態様で弾性連結片53を形成するのに代えて、図11~図16に示すような態様とすることができる。
なお、これらの図では、前述した態様に対応する構成に同一の符号を付してある。
[Modified example]
Furthermore, in this embodiment, instead of forming the elastic connecting piece 53 in the manner described above, it is possible to form the elastic connecting piece 53 in the manner shown in FIGS. 11 to 16.
Note that, in these figures, the same reference numerals are given to components corresponding to the above-described aspects.

これらの図に示す変形例において、弾性連結片53は、ノズル本体51から弁体52に向かって矩形状に延在し、かつ、薄肉屈曲部を介してノズル本体51と前記弁体52とに接続されるように形成されている。
なお、図11は、図1のA-A断面に相当する断面を図2と同様にして示している。
In the modification shown in these figures, the elastic connecting piece 53 extends in a rectangular shape from the nozzle body 51 toward the valve body 52, and is connected to the nozzle body 51 and the valve body 52 via a thin bent portion. formed to be connected.
Note that FIG. 11 shows a cross section corresponding to the AA cross section in FIG. 1 in the same way as FIG. 2.

このような態様で弾性連結片53を形成する場合、弾性連結片53は、薄肉屈曲部53dを起点に弾性的に屈曲し、これによって、弁体52が吐出孔26の周縁部に離接して吐出孔26を開閉する逆止弁として機能することを可能にしている。 When forming the elastic connection piece 53 in such a manner, the elastic connection piece 53 is elastically bent starting from the thin bending portion 53d, and thereby the valve body 52 is moved into and out of contact with the peripheral edge of the discharge hole 26. This allows it to function as a check valve that opens and closes the discharge hole 26.

このような弁体付ノズル部材5は、例えば、図17に示すような射出成形型6を用いて成形することができる。 Such a nozzle member 5 with a valve body can be molded using an injection mold 6 as shown in FIG. 17, for example.

図17に示す射出成形型6は、円柱状のコア部62を含む第一型61と、コア部62が挿入される凹部66を含む第二型65とを備えている。そして、型締めした第一型61と第二型65との間に、弁体付ノズル部材5を成形するキャビティが形成されるようにしている。 The injection mold 6 shown in FIG. 17 includes a first mold 61 including a cylindrical core portion 62 and a second mold 65 including a recess 66 into which the core portion 62 is inserted. A cavity for molding the nozzle member 5 with a valve body is formed between the clamped first mold 61 and second mold 65.

第一型61のコア部62は、ノズル本体51の内周面側を成形するとともに、第二型65の凹部66との間で、弁体52と弾性連結片53とが成形されるように構成されており、第二型65の凹部66の底側には、第一型61のコア部62の頂面との間で、弁体52を成形する弁体成形部M52が刻設されている。そして、第一型61のコア部62の外周面と、第二型65の凹部66の内周面とに、両者の間で、弾性連結片53を成形する弾性連結片成形部M53が刻設されている。
これ以外の構成は、図8に示す射出成形型と同様であるため、重複した説明は省略する。
The core part 62 of the first mold 61 molds the inner circumferential surface side of the nozzle body 51, and the valve body 52 and the elastic connecting piece 53 are molded between the core part 62 and the recess 66 of the second mold 65. A valve body forming part M52 for forming the valve body 52 is carved on the bottom side of the recessed part 66 of the second mold 65 between it and the top surface of the core part 62 of the first mold 61. There is. Then, an elastic connecting piece molding part M53 for forming the elastic connecting piece 53 is carved between the outer peripheral surface of the core part 62 of the first mold 61 and the inner peripheral surface of the recess 66 of the second mold 65. has been done.
The configuration other than this is the same as that of the injection mold shown in FIG. 8, so a redundant explanation will be omitted.

以上のような本実施形態によれば、キャップ本体2に弁体付ノズル部材5を取りけるだけで、逆止弁機能を備えた吐出キャップ1を構成することができ、キャップ本体2と弁体付ノズル部材5とは、それぞれに要求される機能が良好に発揮されるように、適切な材料を用いて形成することができる。
また、弁体付きノズル部材5の剛性よりも、キャップ本体2や上蓋3の剛性の方が高くなり、剛性の高いキャップ本体2と上蓋3とで、剛性の低い弁体付きノズル部材5が挟み込まれるようにすることで(図2、図11参照)、不使用時の内容物に対するシール性をより向上させることができるように、これらを形成する材料を適宜選択するのが好ましい。
According to this embodiment as described above, the discharge cap 1 having a check valve function can be constructed by simply attaching the nozzle member 5 with a valve body to the cap body 2, and the cap body 2 and the valve body The attached nozzle member 5 can be formed using an appropriate material so that each member can satisfactorily perform its required functions.
In addition, the rigidity of the cap body 2 and the top lid 3 is higher than the rigidity of the nozzle member 5 with a valve body, and the nozzle member 5 with a low rigidity valve body is sandwiched between the cap body 2 and the top lid 3, which have high rigidity. It is preferable to select the material for forming these as appropriate so that the sealing performance against the contents when not in use can be further improved by making it possible to seal the contents (see FIGS. 2 and 11).

キャップ本体2は、弁体付ノズル部材5とのシール性、容器本体100との嵌合性、上蓋3との嵌合性などを考慮して、比較的剛性が高い、例えば、ポリプロピレン、高密度ポリエチレンなどを用いて形成することができ、その好ましい曲げ弾性率は500~2000MPaであり、より好ましくは900~1400MPaである。
キャップ本体2を形成する材料の曲げ弾性率が上記範囲を超えると、上蓋3との嵌合力が必要以上に強くなり、開閉し難くなってしまう傾向がある。特に、ヒンジキャップの場合には、ヒンジ切れが生じるなどの不具合が生じかねない。一方、上記範囲に満たないと、上蓋3や容器本体100との嵌合力が不足してしまい、特に、ヒンジキャップの場合には、ヒンジスナップ性を出し難くなってしまう傾向にある。
The cap body 2 is made of a material having relatively high rigidity, such as polypropylene or high density, in consideration of sealability with the nozzle member 5 with a valve body, fitability with the container body 100, fitability with the top lid 3, etc. It can be formed using polyethylene or the like, and its preferable flexural modulus is 500 to 2000 MPa, more preferably 900 to 1400 MPa.
If the bending elastic modulus of the material forming the cap body 2 exceeds the above range, the fitting force with the top lid 3 will become stronger than necessary, making it difficult to open and close. In particular, in the case of a hinged cap, problems such as hinge breakage may occur. On the other hand, if it is less than the above range, the fitting force with the top lid 3 and the container body 100 will be insufficient, and especially in the case of a hinge cap, it will tend to be difficult to achieve hinge snap properties.

また、弁体付ノズル部材5は、弾性連結片53が良好に弾性変形するように、比較的剛性が低い、例えば、低密度ポリエチレン、直鎖状低密度ポリエチレン、超低密度ポリエチレンなどを用いて形成することができ、その好ましい曲げ弾性率は10~200MPaであり、より好ましくは10~100MPaである。
弁体付ノズル部材5を形成する材料の曲げ弾性率が上記範囲を超えると、内容物が弁体52を押し上げる際に、弾性連結片53が弾性変形し難くなり、吐出孔26の開放が妨げられて、内容物を吐出させるのに十分な流路が確保できなくなってしまう傾向がある。一方、上記範囲に満たないと、弾性連結片53が弾性変形し易くなり、弁体52が吐出孔26を閉塞するのに十分な弾性力が得られずに、シール性が低下してしまう傾向にある。
Further, the nozzle member 5 with a valve body is made of a material with relatively low rigidity, such as low density polyethylene, linear low density polyethylene, ultra low density polyethylene, etc. so that the elastic connecting piece 53 can be elastically deformed well. The preferred bending modulus is 10 to 200 MPa, more preferably 10 to 100 MPa.
If the bending elastic modulus of the material forming the nozzle member 5 with a valve body exceeds the above range, when the contents push up the valve body 52, the elastic connecting piece 53 will be difficult to deform elastically, which will prevent the discharge hole 26 from opening. This tends to make it impossible to secure a sufficient flow path for discharging the contents. On the other hand, if the above range is not met, the elastic connecting piece 53 tends to be elastically deformed, and sufficient elastic force for the valve body 52 to close the discharge hole 26 is not obtained, resulting in a tendency for the sealing performance to deteriorate. It is in.

また、ノズル本体51の先端開口部から内容物を吐出させる際に、当該先端開口部付近の汚れを防止するために、弁体付ノズル部材5には撥水剤などを添加することもできる。この場合、キャップ本体2は弁体付ノズル部材5とは別体に構成されているため、容器本体100との嵌合性に影響はない。 Furthermore, when discharging the contents from the tip opening of the nozzle body 51, a water repellent or the like may be added to the valve body-equipped nozzle member 5 in order to prevent the vicinity of the tip opening from getting dirty. In this case, since the cap body 2 is configured separately from the nozzle member 5 with a valve body, the fitability with the container body 100 is not affected.

以上、本発明について、好ましい実施形態を示して説明したが、本発明は、前述した実施形態にのみ限定されるものではなく、本発明の範囲で種々の変更実施が可能であることはいうまでもない。 Although the present invention has been described above by showing preferred embodiments, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made within the scope of the present invention. Nor.

例えば、前述した実施形態では、キャップ本体2と上蓋3とがヒンジ4で連結された例を挙げているが、キャップ本体2と上蓋3とは別々に分離して形成されたものであってもよく、上蓋3は、螺合によってキャップ本体2に着脱可能とすることもできる。 For example, in the embodiment described above, the cap body 2 and the upper lid 3 are connected by the hinge 4, but the cap body 2 and the upper lid 3 may be formed separately. Often, the upper lid 3 can be attached to and detached from the cap body 2 by screwing.

本発明は、例えば、油類、醤油、ソース、ドレッシング等の調味料類、洗剤、化粧品等の薬液類などを内容物とする容器の口部に装着して用いられる逆弁機能を備えた吐出キャップに関連する技術として利用することができる。 The present invention provides a discharge outlet with a reverse valve function that is used by being attached to the mouth of a container containing seasonings such as oils, soy sauce, sauces, and dressings, detergents, and medicinal liquids such as cosmetics. It can be used as a technology related to caps.

1 吐出キャップ
2 キャップ本体
23 ノズル取着部
24 弁体収容部
26 吐出孔
5 弁体付ノズル部材
51 ノズル本体
51a 環状嵌合部
52 弁体
52a 周壁部
52b 環状溝
53 弾性連結片
53a 本体側接続部
53b 弁体側接続部
53c 連結部
53d 薄肉屈曲部
6 射出成形型
61 第一型
62 コア部
65 第二型
66 凹部
M52 弁体成形部
M53 弾性連結片成形部
M53a 本体側接続部成形部
M53b 弁体側接続部成形部
M53c 連結部成形部
1 Discharge cap 2 Cap body 23 Nozzle attachment part 24 Valve body housing part 26 Discharge hole 5 Nozzle member with valve body 51 Nozzle body 51a Annular fitting part 52 Valve body 52a Peripheral wall part 52b Annular groove 53 Elastic connection piece 53a Body side connection Part 53b Valve body side connection part 53c Connection part 53d Thin bending part 6 Injection mold 61 First mold 62 Core part 65 Second mold 66 Recess M52 Valve body molding part M53 Elastic connection piece molding part M53a Main body side connection part molding part M53b Valve Body side connection molding part M53c Connecting part molding part

Claims (6)

ノズル本体に、弾性連結片を介して弁体が連結された弁体付ノズル部材であって、
前記ノズル本体の内周面を成形するコア部を含む第一型と、挿入された前記コア部との間で、前記弁体と前記弾性連結片とが成形される凹部を含む第二型とを備え、前記第一型と前記第二型との間に、前記弁体付ノズル部材を成形するキャビティが形成され、前記第一型の前記コア部の外周面と、前記第二型の前記凹部の内周面とに、両者の間で、前記弾性連結片を成形する弾性連結片成形部が刻設された射出成形型を用いて射出成形され、
前記弾性連結片が、前記弁体に向かって、前記ノズル本体の内周面と面一に、かつ、垂直に垂下する本体側接続部と、前記ノズル本体に向かって、前記弁体の外周面と面一に、かつ、垂直に立ち上る弁体側接続部と、前記本体側接続部と前記弁体側接続部とに接続される連結部とを有し、
前記連結部の内径が、前記ノズル本体の内周面の内径と等しく、
前記連結部の外径が、前記弁体の外径よりも大きく、
前記弁体の外径が、前記ノズル本体の内径以下であることを特徴とする弁体付ノズル部材。
A nozzle member with a valve body, the valve body being connected to a nozzle body via an elastic connection piece,
a first mold including a core part that molds the inner peripheral surface of the nozzle body; and a second mold including a recess in which the valve body and the elastic connecting piece are molded between the inserted core part. A cavity for molding the nozzle member with a valve body is formed between the first mold and the second mold, and the outer circumferential surface of the core portion of the first mold and the Injection molding is performed using an injection mold in which an elastic connecting piece molding portion for forming the elastic connecting piece is carved between the inner circumferential surface of the recess and the elastic connecting piece, and
The elastic connecting piece has a main body side connection portion that hangs down vertically and flush with the inner circumferential surface of the nozzle body toward the valve body, and an outer circumferential surface of the valve body that extends toward the nozzle body. a valve body side connection part rising vertically and flush with the body side connection part, and a connecting part connected to the main body side connection part and the valve body side connection part,
The inner diameter of the connecting portion is equal to the inner diameter of the inner peripheral surface of the nozzle body,
The outer diameter of the connecting portion is larger than the outer diameter of the valve body ,
A nozzle member with a valve body, wherein an outer diameter of the valve body is equal to or less than an inner diameter of the nozzle body.
前記本体側接続部と前記弁体側接続部とが、捩れ角が40~80°となるように配置され、前記連結部が、中心軸に対する傾きが50~70°の螺旋状に形成されている請求項に記載の弁体付ノズル部材。 The main body side connecting portion and the valve body side connecting portion are arranged so that the torsion angle is 40 to 80°, and the connecting portion is formed in a spiral shape with an inclination of 50 to 70° with respect to the central axis. The nozzle member with a valve body according to claim 1 . 前記ノズル本体の外周面から断面L字状に張り出して、前記ノズル本体の基端側に垂下する環状嵌合部を備える請求項1又は2に記載の弁体付ノズル部材。 The nozzle member with a valve body according to claim 1 or 2, further comprising an annular fitting portion that protrudes from the outer peripheral surface of the nozzle body in an L-shaped cross section and hangs down toward the base end side of the nozzle body. 前記弁体が、前記弁体の周縁に沿って、前記弾性連結片が接続する側とは反対側に環状に突出する周壁部を有し、かつ、前記周壁部の内周に沿って環状溝が形成されている請求項1~3のいずれか一項に記載の弁体付ノズル部材。 The valve body has a circumferential wall portion that protrudes in an annular shape along the circumference of the valve body on a side opposite to the side to which the elastic connecting piece connects, and an annular groove is formed along the inner periphery of the circumferential wall portion. The nozzle member with a valve body according to any one of claims 1 to 3, wherein the nozzle member has a valve body. 請求項1~4のいずれか一項に記載の弁体付ノズル部材が取り付けられたキャップ本体と、前記キャップ本体に着脱可能な上蓋とを備える吐出キャップであって、
前記キャップ本体には、前記弁体付ノズル部材が取り付けられるノズル取着部が設けられており、
前記ノズル取着部に形成された弁体収容部の底部に吐出孔が穿設され、当該吐出孔の周縁部が、前記弁体収容部に収容された前記弁体が接離する弁座として機能するように形成されていることを特徴とする吐出キャップ。
A discharge cap comprising a cap body to which the nozzle member with a valve body according to any one of claims 1 to 4 is attached, and an upper lid that is removably attached to the cap body,
The cap body is provided with a nozzle attachment part to which the nozzle member with a valve body is attached,
A discharge hole is formed in the bottom of the valve body accommodating portion formed in the nozzle attachment portion, and a peripheral edge of the discharge hole serves as a valve seat on which the valve body accommodated in the valve body accommodating portion comes into contact with and separates from the valve seat. A discharge cap characterized in that it is configured to function.
請求項1~4のいずれか一項に記載の弁体付ノズル部材を成形するための射出成形型であって、
円柱状のコア部を含む第一型と、前記コア部が挿入される凹部を含む第二型とを備え、
型締めした前記第一型と前記第二型との間に、前記弁体付ノズル部材を成形するキャビティが形成され、
前記コア部は、前記ノズル本体の内周面側を成形するとともに、前記凹部との間で、前記弁体と前記弾性連結片とが成形されるように、
前記凹部の底側に、前記コア部の頂面との間で、前記弁体を成形する弁体成形部が刻設され、
前記コア部の頂面側の外周面に、前記凹部の内周面との間で、前記弁体側接続部を成形する弁体側接続部成形部が刻設され、
前記凹部の内周面に、前記コア部の外周面との間で、前記本体側接続部を成形する本体側接続部成形部と、前記弾性連結片の前記連結部を成形する連結部成形部が刻設されていることを特徴とする射出成形型。
An injection mold for molding the nozzle member with a valve body according to any one of claims 1 to 4 ,
A first type including a cylindrical core part, and a second type including a recess into which the core part is inserted,
A cavity for molding the nozzle member with a valve body is formed between the clamped first mold and the second mold,
The core part molds the inner peripheral surface side of the nozzle body, and the valve body and the elastic connecting piece are molded between the core part and the recess,
A valve body molding part for shaping the valve body is carved on the bottom side of the recessed part between it and the top surface of the core part,
A valve body side connection portion molding portion for forming the valve body side connection portion is engraved on the outer peripheral surface of the top surface side of the core portion between it and the inner peripheral surface of the recessed portion,
A main body side connection part molding part that molds the main body side connection part between the inner peripheral surface of the recess and the outer peripheral surface of the core part, and a connection part molding part that molds the connection part of the elastic connection piece. An injection mold characterized by being engraved with.
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