JP6951203B2

JP6951203B2 - Bag with zipper

Info

Publication number: JP6951203B2
Application number: JP2017218277A
Authority: JP
Inventors: 隆之野口
Original assignee: Seisan Nipponsha KK
Current assignee: Seisan Nipponsha KK
Priority date: 2017-11-13
Filing date: 2017-11-13
Publication date: 2021-10-20
Anticipated expiration: 2037-11-13
Also published as: JP2019089566A

Description

本開示は、再封止可能なチャック付袋、特にチャックを閉鎖した後に、袋内に空気が入り込みにくい気密用のチャック付袋に関する。 The present disclosure relates to a bag with a zipper that can be resealed, particularly a bag with a zipper for airtightness that prevents air from entering the bag after the chuck is closed.

線状に形成され、かみ合うように形成された雄爪と雌爪よりなるプラスチックチャックにおいて、雄爪及び／または雌爪に平行にリブを形成し、リブ上部に所定の凹凸を形成して、密封性を改良した技術がある（例えば、特許文献１を参照。）。 In a plastic chuck composed of male and female nails formed linearly and meshing with each other, ribs are formed parallel to the male and / or female nails, and predetermined irregularities are formed on the upper part of the ribs to seal the plastic chuck. There is a technique for improving the sex (see, for example, Patent Document 1).

雄部と雌部とからなるチャックによって密封空間を形成するチャック付き袋において、雄部の両側に沿って延びる一対の突起部を有し、無負荷状態において前記一対の突起部のうち密封空間側の突起部の高さが雄部の高さよりも大きくすることで、内容物の漏れ防止を高めた技術がある（例えば、特許文献２を参照。）。 In a bag with a zipper that forms a sealed space by a chuck composed of a male part and a female part, the bag has a pair of protrusions extending along both sides of the male part, and the sealed space side of the pair of protrusions in a no-load state. There is a technique for improving the prevention of leakage of the contents by making the height of the protruding portion of the male portion larger than the height of the male portion (see, for example, Patent Document 2).

特開平１０−１１４７号公報Japanese Unexamined Patent Publication No. 10-1147 特開平１１−１８０４５３号公報Japanese Unexamined Patent Publication No. 11-180453

特許文献１の技術は、チャックの封止状態を触感により確実に感知することによって、雄爪と雌爪とを確実にかみ合わせをさせ、密閉性を改良しようとする技術である。よって、
雄爪と雌爪とが確実にかみ合わさった状態におけるさらなる密閉性の向上を図る技術ではない。 The technique of Patent Document 1 is a technique for reliably engaging a male claw and a female claw by reliably sensing the sealed state of a chuck by tactile sensation, and improving the airtightness. Therefore,
It is not a technique for further improving the airtightness in a state where the male nail and the female nail are surely meshed with each other.

特許文献２の技術は、密封空間内に液状の内容物等が収容されたとしても内容物が密封空間側の突起部でせき止められ、チャックをほとんど侵すことがない、すなわち液漏れ防止を向上させようとする技術である。しかし、密封空間内が例えば減圧状態となった場合に、外気が袋の開口部からチャックを通して密封空間内に混入することを防止する技術ではない。 The technique of Patent Document 2 improves that even if a liquid content or the like is contained in the sealed space, the content is dammed by a protrusion on the sealed space side and hardly invades the chuck, that is, the prevention of liquid leakage is improved. It is a technology to try. However, it is not a technique for preventing outside air from entering the sealed space through the chuck through the opening of the bag when the inside of the sealed space is decompressed, for example.

本開示は、再封止可能なチャック付袋において、チャックを閉鎖した後に、袋内に空気が入り込みにくい気密用のチャック付袋を提供することを目的とする。 An object of the present disclosure is to provide a bag with a zipper that can be resealed, and for airtightness, in which air does not easily enter the bag after the zipper is closed.

本発明者らは、鋭意検討したところ、密封空間となる収容部が減圧状態となっているときに、チャックに設けたリブの方に傾いて密着する弁代わりの支柱部を設けることで上記課題が解決できることを見出し、本発明を完成させた。すなわち、本発明に係るチャック付き袋は、収容部と開口部とを有する包装袋と、前記開口部の縁に沿って内壁側に固着された帯状のチャックと、を有し、前記チャックは、帯状の雄基部と該雄基部の長手方向に沿って突設された雄型咬合部を有する雄部材と、帯状の雌基部と該雌基部の長手方向に沿って突設され、前記雄型咬合部と係脱可能に係合する雌型咬合部を有する雌部材とを有するチャック付き袋において、前記雄部材及び前記雌部材のいずれか一方は、前記雄型咬合部又は前記雌型咬合部の両脇に一対のリブを有し、その他方は、前記雄型咬合部又は前記雌型咬合部の両脇であって前記雄型咬合部と前記雌型咬合部とを係合したときに前記リブの内側となる位置に一対の支柱部を有し、前記一対の支柱部のうち、少なくとも前記収容部側の支柱部が、根元部にくびれを有し、かつ、前記収容部が減圧状態のときに収容部側に傾いて収容部側のリブに当接することを特徴とする。 As a result of diligent studies, the present inventors have made the above-mentioned problems by providing a support column portion instead of a valve that tilts toward the rib provided on the chuck and comes into close contact with the accommodating portion that becomes the sealed space when the pressure is reduced. We found that we could solve the problem, and completed the present invention. That is, the bag with a chuck according to the present invention has a packaging bag having an accommodating portion and an opening, and a band-shaped chuck fixed to the inner wall side along the edge of the opening, and the chuck has. A male member having a band-shaped male base and a male occlusal portion projecting along the longitudinal direction of the male base, and a band-shaped female base and a male member projecting along the longitudinal direction of the female base, said male occlusal. In a bag with a chuck having a female member having a female occlusal portion that engages with a portion detachably, either the male member or the female member is of the male occlusal portion or the female occlusal portion. The other side has a pair of ribs on both sides, and the other side is the male occlusal portion or both sides of the female occlusal portion, and when the male occlusal portion and the female occlusal portion are engaged with each other, the said A pair of strut portions are provided at positions inside the ribs, and at least the strut portion on the accommodating portion side of the pair of strut portions has a constriction at the root portion, and the accommodating portion is in a reduced pressure state. It is characterized in that it sometimes tilts toward the accommodating portion and comes into contact with the rib on the accommodating portion side.

本発明に係るチャック付き袋では、前記収容部側の支柱部が、根元部の両側に又は収容部側のみに前記くびれを有することが好ましい。支柱部が収容部側により傾きやすくなり、リブに密着しやすくなる。 In the bag with a zipper according to the present invention, it is preferable that the strut portion on the accommodating portion side has the constriction on both sides of the root portion or only on the accommodating portion side. The strut portion is more likely to tilt toward the accommodating portion, and is more likely to adhere to the rib.

本発明に係るチャック付き袋では、前記チャックとして、前記開口部の縁に沿って前記開口部側の上チャックと前記収容部側の下チャックの２つを併設し、少なくとも前記下チャックの収容部側の支柱部が、根元部にくびれを有することが好ましい。チャックを２重に並べることで、より密閉性が向上する。また、開口するための操作が２段階となるので、誤って上チャックを開けたとしても気密性を保つことができる。 In the bag with a zipper according to the present invention, two chucks, an upper chuck on the opening side and a lower chuck on the accommodating portion side, are provided along the edge of the opening, and at least the accommodating portion of the lower chuck is provided. It is preferable that the strut portion on the side has a constriction at the root portion. By arranging the chucks in duplicate, the airtightness is further improved. Further, since the operation for opening is performed in two steps, the airtightness can be maintained even if the upper chuck is accidentally opened.

本発明に係るチャック付き袋では、前記支柱部が、いずれも根元部にくびれを有することが好ましい。支柱部が収容部側により傾きやすくなり、リブに密着しやすくなるとともに支柱部の成形のしやすさが向上する。また、上チャックと下チャックがある場合には上チャックにもくびれが設けられるので、気密性の向上が見込める。 In the bag with a zipper according to the present invention, it is preferable that all of the strut portions have a constriction at the root portion. The strut portion is more easily tilted toward the accommodating portion, which makes it easier to adhere to the ribs and improves the ease of forming the strut portion. Further, when there are an upper chuck and a lower chuck, the upper chuck is also provided with a constriction, so that the airtightness can be expected to be improved.

本発明に係るチャック付き袋では、前記雄型咬合部と前記雌型咬合部とを係合したときに、前記雌型咬合部の内周面の全体が前記雄型咬合部の表面と接し、かつ、前記雄型咬合部と前記雌型咬合部とを係合させないときに、前記チャックの長手方向の横断面において、前記雌型咬合部のカギ内側の最大間隔が、前記雄型咬合部の最大幅よりも小さいことが好ましい。咬合部において気密性を高めることができる。 In the bag with a chuck according to the present invention, when the male occlusal portion and the female occlusal portion are engaged, the entire inner peripheral surface of the female occlusal portion comes into contact with the surface of the male occlusal portion. Moreover, when the male occlusal portion and the female occlusal portion are not engaged, the maximum distance inside the key of the female occlusal portion in the longitudinal cross section of the chuck is the male occlusal portion. It is preferably smaller than the maximum width. Airtightness can be improved at the occlusal part.

本発明に係るチャック付き袋では、前記チャックのうち少なくとも収容部側のチャックについて、収容部側の支柱部の長さが開口部側の支柱部の長さよりも短いことが好ましい。収容空間内が減圧状態となっているときに、収容部側のチャックにおいて、収容部側の雄基部と雌基部とが接近しやすくなる。このとき、収容部側のリブの根元と支柱部の根元も接近する。上記構造を有することで、支柱部が傾いたときに支柱部の側面がリブに接触しやすくなるので、支柱部とリブとの接触面積を大きくすることができ、減圧状態が破られるまでより高い気密性が得られやすくなる。一方、開口部側の支柱部も弁としての役割を果たし易くなる。 In the bag with a chuck according to the present invention, it is preferable that the length of the strut portion on the accommodating portion side is shorter than the length of the strut portion on the opening side for at least the chuck on the accommodating portion side of the chucks. When the inside of the accommodating space is in a decompressed state, the male base portion and the female base portion on the accommodating portion side can easily approach each other in the chuck on the accommodating portion side. At this time, the roots of the ribs on the accommodating portion side and the roots of the strut portions also approach each other. By having the above structure, the side surface of the strut portion easily comes into contact with the rib when the strut portion is tilted, so that the contact area between the strut portion and the rib can be increased, which is higher until the decompression state is broken. Airtightness can be easily obtained. On the other hand, the strut portion on the opening side also easily plays a role as a valve.

本発明に係るチャック付き袋では、前記チャックのうち少なくとも収容部側のチャックについて、収容部側の支柱部の長さが収容部側のリブの長さよりも短いことが好ましい。収容空間内が減圧状態となっているときに、収容部側のチャックにおいて、収容部側の雄基部と雌基部とが接近しやすくなる。このとき、収容部側のリブの根元と支柱部の根元も接近する。上記構造を有することで、支柱部の先端が対向する基部とぶつかることなく傾いて支柱部の側面がリブに接触することができるので、支柱部とリブとの接触面積を大きくすることができ、減圧状態が破られるまでより高い気密性が得られやすくなる。 In the bag with a chuck according to the present invention, it is preferable that the length of the strut portion on the accommodating portion side is shorter than the length of the rib on the accommodating portion side for at least the chuck on the accommodating portion side of the chucks. When the inside of the accommodating space is in a decompressed state, the male base portion and the female base portion on the accommodating portion side can easily approach each other in the chuck on the accommodating portion side. At this time, the roots of the ribs on the accommodating portion side and the roots of the strut portions also approach each other. By having the above structure, the tip of the strut portion can be tilted without colliding with the facing base portion and the side surface of the strut portion can come into contact with the rib, so that the contact area between the strut portion and the rib can be increased. It becomes easier to obtain higher airtightness until the decompression state is broken.

本発明に係るチャック付き袋では、前記チャックのうち少なくとも収容部側のチャックについて、収容部側のリブがその先端部に開口部側に突出する突部を有し、前記収容部が減圧状態のときに、前記突部が収容部側の支柱部のくびれに嵌まることが好ましい。上記構造を有することで、減圧状態が破られるまでより高い気密性が得られやすくなる。 In the bag with a chuck according to the present invention, at least the chuck on the accommodating portion side of the chuck has a rib on the accommodating portion side having a protrusion protruding toward the opening side at the tip thereof, and the accommodating portion is in a decompressed state. Occasionally, it is preferable that the protrusion fits into the constriction of the strut on the accommodating portion side. By having the above structure, it becomes easy to obtain higher airtightness until the depressurized state is broken.

本発明に係るチャック付き袋では、前記チャックのうち少なくとも収容部側のチャックについて、収容部側のリブの長さが開口部側のリブの長さよりも短いことが好ましい。収容空間内が減圧状態となっているときに、チャックのシールの解除がされにくくなるように、収容部側のチャックにおいて、収容部側の雄基部と雌基部とが接近した状態を維持しやすい。 In the bag with a chuck according to the present invention, it is preferable that the length of the rib on the accommodating portion side is shorter than the length of the rib on the opening side for at least the chuck on the accommodating portion side among the chucks. It is easy to maintain a state in which the male base and the female base on the accommodating portion are close to each other in the chuck on the accommodating portion side so that the seal of the chuck is not easily released when the inside of the accommodating space is in a decompressed state. ..

本発明に係るチャック付き袋では、前記雌基部は、前記雌型咬合部の両脇に一対のリブを有し、前記雄基部は、前記雄型咬合部の両脇であって前記雄型咬合部と前記雌型咬合部とを係合したときに前記リブの内側となる位置に一対の支柱部を有することが好ましい。チャックを確実に嵌合させ、支柱部を所定の位置に配置し易くできる。 In the bag with a chuck according to the present invention, the female base portion has a pair of ribs on both sides of the female occlusal portion, and the male base portion is both sides of the male occlusal portion and the male occlusal portion. It is preferable to have a pair of strut portions at positions inside the rib when the portion and the female occlusal portion are engaged with each other. The chuck can be securely fitted, and the support column can be easily arranged in a predetermined position.

本発明に係るチャック付き袋では、前記包装袋は、前記収容部を形成する壁部に排気用の孔を有することが好ましい。収容部を容易に減圧状態とすることができる。 In the bag with a zipper according to the present invention, it is preferable that the packaging bag has an exhaust hole in the wall portion forming the accommodating portion. The accommodating portion can be easily decompressed.

本開示によれば、再封止可能なチャック付袋において、チャックを閉鎖した後に、袋内に空気が入り込みにくい気密用のチャック付袋を提供することができる。 According to the present disclosure, in a bag with a zipper that can be resealed, it is possible to provide a bag with a zipper for airtightness in which air does not easily enter the bag after the chuck is closed.

本実施形態に係るチャック付袋の一例を示す正面図である。It is a front view which shows an example of the bag with a zipper which concerns on this embodiment. 図１のＡ−Ａ線断面図である。FIG. 1 is a cross-sectional view taken along the line AA of FIG. 図２の下チャックの断面拡大図である。FIG. 2 is an enlarged cross-sectional view of the lower chuck of FIG. 図２の上チャックの断面拡大図である。FIG. 2 is an enlarged cross-sectional view of the upper chuck of FIG. 下チャックの変形例１の断面拡大図である。It is a cross-sectional enlarged view of the modification 1 of the lower chuck. 下チャックの咬合状態を説明するための概略図であり、（ａ）は咬合状態での断面拡大図であり、（ｂ）は咬合状態を外したとき断面拡大図である。It is a schematic diagram for demonstrating the occlusal state of the lower chuck, (a) is an enlarged cross-sectional view in an occlusal state, and (b) is an enlarged cross-sectional view when the occlusal state is removed. 本実施形態に係るチャック付袋において、収容部内が減圧状態のときのＡ−Ａ線断面図である。FIG. 5 is a cross-sectional view taken along the line AA when the inside of the accommodating portion is in a decompressed state in the bag with a zipper according to the present embodiment. 本実施形態に係るチャック付袋において、収容部内が加圧状態のときのＡ−Ａ線断面図である。FIG. 5 is a cross-sectional view taken along the line AA when the inside of the accommodating portion is in a pressurized state in the bag with a zipper according to the present embodiment. 下チャックの変形例２の断面拡大図である。It is a cross-sectional enlarged view of the modification 2 of the lower chuck. 収容部内が減圧状態のときの下チャックの変形例２の断面拡大図である。It is a cross-sectional enlarged view of the modification 2 of the lower chuck when the inside of the accommodating part is in a depressurized state. 下チャックの変形例３の断面拡大図である。It is a cross-sectional enlarged view of the modification 3 of the lower chuck. 収容部内が減圧状態のときの下チャックの変形例３の断面拡大図である。It is a cross-sectional enlarged view of the modification 3 of the lower chuck when the inside of the accommodating part is in a depressurized state. 下チャックの変形例４の断面拡大図である。It is a cross-sectional enlarged view of the modification 4 of the lower chuck. 収容部内が減圧状態のときの下チャックの変形例４の断面拡大図である。It is a cross-sectional enlarged view of the modification 4 of the lower chuck when the inside of the accommodating part is in a depressurized state. 下チャックの変形例５の断面拡大図である。It is a cross-sectional enlarged view of the modification 5 of the lower chuck. 収容部内が減圧状態のときの下チャックの変形例５の断面拡大図である。It is a cross-sectional enlarged view of the modification 5 of the lower chuck when the inside of the accommodating part is in a depressurized state. 下チャックの変形例６の断面拡大図である。It is a cross-sectional enlarged view of the modification 6 of the lower chuck. 排気用の孔を有するチャック付袋の一例を示す断面図である。It is sectional drawing which shows an example of the bag with a zipper which has a hole for exhaust.

次に、本発明について実施形態を示して詳細に説明するが本発明はこれらの記載に限定して解釈されない。本発明の効果を奏する限り、実施形態は種々の変形をしてもよい。 Next, the present invention will be described in detail by showing embodiments, but the present invention is not construed as being limited to these descriptions. The embodiments may be modified in various ways as long as the effects of the present invention are exhibited.

図１〜図４を参照して本実施形態に係るチャック付き袋について説明する。本実施形態に係るチャック付き袋１００は、図１及び図２に示すように、収容部４と開口部１とを有する包装袋８と、開口部１の縁に沿って内壁側に固着された帯状のチャック３と、を有する。ここで、チャック３は、帯状の雄基部１０と雄基部１０の長手方向に沿って突設された雄型咬合部１１を有する雄部材１２と、帯状の雌基部１３と雌基部１３の長手方向に沿って突設され、雄型咬合部１１と係脱可能に係合する雌型咬合部１４を有する雌部材１５とを有する。帯状とは、図１に示すように、チャック３が包装袋８の開口部１の縁に沿って延びていた形状を有していることをいう。また、長手方向とは、帯状の長手方向のことをいう。そして、図２及び図３に示すように、雌部材１５は、雌型咬合部１４の両脇に一対のリブ１６ａ，１６ｂ（１６）を有し、雄部材１２は、雄型咬合部１１の両脇であって雄型咬合部１１と雌型咬合部１４とを係合したときにリブ１６ａ，１６ｂの内側となる位置に一対の支柱部１７ａ，１７ｂ（１７）を有し、一対の支柱部１７ａ，１７ｂのうち、少なくとも収容部側の支柱部１７ａが、根元部にくびれ１８を有し、かつ、収容部４が減圧状態のときに収容部４側に傾いて収容部４側のリブ１６ａに当接する。なお、図２は、収容部４に内容物７が収容されていて、かつ、収容部４が減圧状態であるときを図示した。減圧によって収容部４に外気が入ろうとする方向を符号３４で示した。また、減圧によって収容部４の基材フィルムが内容物７を圧縮する応力が働いている。 The bag with a zipper according to the present embodiment will be described with reference to FIGS. 1 to 4. As shown in FIGS. 1 and 2, the zippered bag 100 according to the present embodiment is fixed to the packaging bag 8 having the accommodating portion 4 and the opening 1 and the inner wall side along the edge of the opening 1. It has a strip-shaped chuck 3. Here, the chuck 3 has a male member 12 having a strip-shaped male base 10 and a male occlusal portion 11 projecting along the longitudinal direction of the male base 10, and a strip-shaped female base 13 and a female base 13 in the longitudinal direction. It has a female member 15 having a female occlusal portion 14 projecting along the occlusal portion and engaging with the male occlusal portion 11 in a disengaged manner. As shown in FIG. 1, the band shape means that the chuck 3 has a shape extending along the edge of the opening 1 of the packaging bag 8. Further, the longitudinal direction means a strip-shaped longitudinal direction. Then, as shown in FIGS. 2 and 3, the female member 15 has a pair of ribs 16a and 16b (16) on both sides of the female occlusal portion 14, and the male member 12 is the male occlusal portion 11. A pair of strut portions 17a, 17b (17) are provided at positions on both sides that are inside the ribs 16a, 16b when the male occlusal portion 11 and the female occlusal portion 14 are engaged, and a pair of strut portions. Of the portions 17a and 17b, at least the strut portion 17a on the accommodating portion side has a constriction 18 at the root portion, and when the accommodating portion 4 is in a reduced pressure state, the rib portion on the accommodating portion 4 side is tilted toward the accommodating portion 4. It abuts on 16a. Note that FIG. 2 illustrates the case where the content 7 is housed in the housing part 4 and the housing part 4 is in a decompressed state. The direction in which the outside air is about to enter the accommodating portion 4 due to the reduced pressure is indicated by reference numeral 34. Further, the stress that the base film of the accommodating portion 4 compresses the content 7 acts due to the decompression.

チャック付き袋１００は、例えば図１に示すように、側面の端部及び底の端辺に基材フィルム同士が融着した融着部５、６を有している。基材フィルムは合成樹脂製であり、例えばポリエチレンフィルム、ポリプロピレンフィルムである。雄部材１２及び雌部材１５は合成樹脂製であり、例えばポリエチレンフィルム、ポリプロピレンフィルムである。雄部材１２及び雌部材１５は包装袋８の内壁面に、融着または接着されることによって固着している。 As shown in FIG. 1, for example, the zipper-equipped bag 100 has fused portions 5 and 6 in which the base films are fused to each other at the side edge and the bottom edge. The base film is made of synthetic resin, and is, for example, a polyethylene film or a polypropylene film. The male member 12 and the female member 15 are made of synthetic resin, and are, for example, a polyethylene film and a polypropylene film. The male member 12 and the female member 15 are fixed to the inner wall surface of the packaging bag 8 by fusing or adhering.

雄型咬合部１１は断面形状が矢尻状の頭部とすることが好ましく、雌型咬合部１４は雄型咬合部１１の頭部が嵌まるような断面形状が略Ｕ字状の凹形状であってその両側の先端には互いに向き合う鉤が設けられた形状、すなわちフックが互いに向い合う形状とすることが好ましい。リブ１６ａ，１６ｂ（１６）は、断面形状を台形、逆台形、四角形、三角形状又は多角形とすることが好ましく、台形がより好ましい。支柱部１７ａ，１７ｂ（１７）は、断面形状を、リブ１６よりも細長い突条形状、三角形状、台形、逆台形又は多角形とすることが好ましい。雄型咬合部１１と雌型咬合部１４とが係合したとき、リブ１６ａ，１６ｂ（１６）は対向する雄基部１０又は雌基部１３に当接または接近するため、雄基部１０及び雌基部１３は安定的に支持され、さらに、係合した雄型咬合部１１及び雌型咬合部１４も安定化する。例えば、雄基部１０の厚みを含む雄型咬合部１１の高さは１．０〜１．３ｍｍ、鏃状の頭部の幅は０．７〜１．０ｍｍ、雌基部１３の厚みを含む雌型咬合部１４の高さは１．０〜１．３ｍｍ、雌型咬合部１４の幅は１．２〜１．５ｍｍ、雌基部１３の厚みを含むリブ１６ａ，１６ｂの高さは０．７〜１．１ｍｍ、幅は０．７〜０．９ｍｍ、雄基部１０の厚みを含む支柱部１７ａ，１７ｂの高さは０．９〜１．２ｍｍ、幅は０．２〜０．３ｍｍであるが、これらの数字に本発明が制限されることはない。 The male occlusal portion 11 preferably has an arrowhead-shaped head, and the female occlusal portion 14 has a substantially U-shaped concave shape so that the head of the male occlusal portion 11 fits. It is preferable that the tips on both sides of the hook are provided with hooks facing each other, that is, the hooks are facing each other. The ribs 16a and 16b (16) preferably have a trapezoidal, inverted trapezoidal, quadrangular, triangular or polygonal cross-sectional shape, and more preferably a trapezoidal shape. It is preferable that the support columns 17a and 17b (17) have a cross-sectional shape that is more elongated than the rib 16 and has a ridge shape, a triangular shape, a trapezoidal shape, an inverted trapezoidal shape, or a polygonal shape. When the male occlusal portion 11 and the female occlusal portion 14 are engaged, the ribs 16a and 16b (16) abut or approach the male base portion 10 or the female base portion 13 which face each other, so that the male base portion 10 and the female base portion 13 are brought into contact with each other. Is stably supported, and the engaged male occlusal portion 11 and female occlusal portion 14 are also stabilized. For example, the height of the male occlusal portion 11 including the thickness of the male base 10 is 1.0 to 1.3 mm, the width of the cheek-shaped head is 0.7 to 1.0 mm, and the female including the thickness of the female base 13. The height of the mold occlusal portion 14 is 1.0 to 1.3 mm, the width of the female occlusal portion 14 is 1.2 to 1.5 mm, and the heights of the ribs 16a and 16b including the thickness of the female base portion 13 are 0.7. The height of the support columns 17a and 17b including the thickness of the male base 10 is 0.9 to 1.2 mm, and the width is 0.2 to 0.3 mm. However, these numbers do not limit the invention.

収容部４側の支柱部１７ａは、図３に示すように、支柱部１７ａの根元部の両側にくびれ１８を有することが好ましい。また、図５に示すように、支柱部１７ａの根元部の収容部４側のみにくびれ１８を有することが好ましい。図５の支柱部１７ａの根元部の開口部１側には、くびれが設けられておらず、支柱部の根元部にくびれがないことを符号１９で示した。また、図５では、支柱部１７ｂの根元部の開口部１側及び収容部４側には、いずれもくびれが設けられておらず、これを符号１９で示した。図３及び図５に示した形態は、収容部４側の支柱部１７ａの根元部の収容部４側には、必ず、くびれ１８が形成されており、このくびれによって、支柱部１７ａが収容部４側により傾きやすくなり、リブ１６ａに密着しやすくなる。すなわち、支柱部１７ａは、リブ１６ａに密着することで閉となる弁の役割を持っている。 As shown in FIG. 3, the strut portion 17a on the accommodating portion 4 side preferably has constrictions 18 on both sides of the root portion of the strut portion 17a. Further, as shown in FIG. 5, it is preferable to have a constriction 18 only on the accommodating portion 4 side of the root portion of the strut portion 17a. No constriction is provided on the opening 1 side of the root portion of the strut portion 17a in FIG. 5, and reference numeral 19 indicates that there is no constriction at the root portion of the strut portion. Further, in FIG. 5, neither the opening 1 side nor the accommodating portion 4 side of the root portion of the strut portion 17b is provided with a constriction, which is indicated by reference numeral 19. In the form shown in FIGS. 3 and 5, a constriction 18 is always formed on the accommodating portion 4 side of the root portion of the strut portion 17a on the accommodating portion 4 side, and the strut portion 17a becomes the accommodating portion due to this constriction. It becomes easier to tilt on the 4 side, and it becomes easier to adhere to the rib 16a. That is, the strut portion 17a has a role of a valve that is closed by being in close contact with the rib 16a.

チャック付き袋１００は、例えば図２に示すように、チャックとして、開口部１の縁に沿って開口部１側の上チャック２と収容部４側の下チャック３の２つを併設し、少なくとも下チャック３の収容部４側の支柱部１７ａが、根元部にくびれ１８を有することが好ましい。チャックを２重に並べることで、より密閉性が向上する。また、開口するための操作が２段階となるので、誤って上チャック２を開けたとしても気密性を保つことができる。このとき、少なくとも下チャック３の収容部４側の支柱部１７ａが、根元部にくびれ１８を有することで、収容部４が減圧状態のときに支柱部１７ａが収容部４側に傾いて収容部４側のリブ２６ａに当接しやすくなり、収容部４へ空気が入ることを抑制できる。 As shown in FIG. 2, for example, the zipper-equipped bag 100 has two chucks, an upper chuck 2 on the opening 1 side and a lower chuck 3 on the accommodating portion 4 side, along the edge of the opening 1. It is preferable that the support column portion 17a on the accommodating portion 4 side of the lower chuck 3 has a constriction 18 at the root portion. By arranging the chucks in duplicate, the airtightness is further improved. Further, since the operation for opening is performed in two steps, the airtightness can be maintained even if the upper chuck 2 is accidentally opened. At this time, at least the strut portion 17a on the accommodating portion 4 side of the lower chuck 3 has a constriction 18 at the root portion, so that the strut portion 17a is tilted toward the accommodating portion 4 side when the accommodating portion 4 is in a decompressed state. It becomes easy to come into contact with the rib 26a on the 4 side, and it is possible to prevent air from entering the accommodating portion 4.

上チャック２は、図４に示すように、下チャック３と基本的構造は同じであり、雄基部２０と雄基部２０の長手方向に沿って突設された雄型咬合部２１を有する雄部材２２と、帯状の雌基部２３と雌基部２３の長手方向に沿って突設され、雄型咬合部２１と係脱可能に係合する雌型咬合部２４を有する雌部材２５とを有する。そして、雌部材２５は、雌型咬合部２４の両脇に一対のリブ２６ａ，２６ｂ（２６）を有し、雄部材２２は、雄型咬合部２１の両脇であって雄型咬合部２１と雌型咬合部２４とを係合したときにリブ２６ａ，２６ｂの内側となる位置に一対の支柱部２７ａ，２７ｂ（２７）を有する。上チャック２では収容部４側の支柱部２７ａの根元部にくびれ２８を必須として設ける必要はないが、図４に示すように、支柱部２７ａの根元部のうち、収容部４側にくびれ２８を設けることが好ましい。 As shown in FIG. 4, the upper chuck 2 has the same basic structure as the lower chuck 3, and is a male member having a male base 20 and a male occlusal portion 21 projecting along the longitudinal direction of the male base 20. It has 22 and a female member 25 having a band-shaped female base 23 and a female occlusal portion 24 projecting along the longitudinal direction of the female base portion 23 and engaging disengageably with the male occlusal portion 21. The female member 25 has a pair of ribs 26a and 26b (26) on both sides of the female occlusal portion 24, and the male member 22 is both sides of the male occlusal portion 21 and the male occlusal portion 21. A pair of strut portions 27a, 27b (27) are provided at positions inside the ribs 26a, 26b when the female occlusal portion 24 is engaged with the female occlusal portion 24. In the upper chuck 2, it is not necessary to provide a constriction 28 at the base of the strut 27a on the accommodating portion 4 side as an essential part, but as shown in FIG. It is preferable to provide.

チャック付き袋１００では、支柱部が、いずれも根元部にくびれを有することが好ましい。すなわち、チャックが１つ設けられた形態では、チャックの有するすべての支柱部の根元部にくびれを有することが好ましく、図２に示すように、上チャック２と下チャック３とが設けられた形態では、上チャック２及び下チャック３の有するすべての支柱部の根元部の収容部４側にくびれ１８を有することが好ましい。支柱部が収容部側により傾きやすくなり、リブに密着しやすくなるとともに支柱部の成形のしやすさが向上する。さらに、支柱部１７ａ，１７ｂの根元部の両側（収容部４側と開口部１側の両方）にくびれ１８を設けることが好ましい。形状が支柱部の中心線に対して線対称となることでさらに成形性が良好となる。図２及び図４に示すように、収容部４側の支柱部２７ａのみならず、開口部１側の支柱部２７ｂにもくびれ２８を設けている。上チャック２にもくびれが設けられるので、気密性の向上が見込める。さらに、支柱部２７ａ，２７ｂの根元部の両側にくびれ２８を設けることが好ましい。形状が支柱部の中心線に対して線対称となることでさらに成形性が良好となる。 In the bag 100 with a zipper, it is preferable that all the strut portions have a constriction at the root portion. That is, in the form in which one chuck is provided, it is preferable that the roots of all the support columns of the chuck have a constriction, and as shown in FIG. 2, the upper chuck 2 and the lower chuck 3 are provided. Then, it is preferable to have a constriction 18 on the accommodating portion 4 side of the root portion of all the strut portions of the upper chuck 2 and the lower chuck 3. The strut portion is more easily tilted toward the accommodating portion, which makes it easier to adhere to the ribs and improves the ease of forming the strut portion. Further, it is preferable to provide constrictions 18 on both sides (both the accommodating portion 4 side and the opening 1 side) of the root portions of the strut portions 17a and 17b. Since the shape is line-symmetric with respect to the center line of the support column, the moldability is further improved. As shown in FIGS. 2 and 4, not only the strut portion 27a on the accommodating portion 4 side but also the strut portion 27b on the opening 1 side is provided with a constriction 28. Since the upper chuck 2 is also provided with a constriction, improvement in airtightness can be expected. Further, it is preferable to provide constrictions 28 on both sides of the root portions of the strut portions 27a and 27b. Since the shape is line-symmetric with respect to the center line of the support column, the moldability is further improved.

チャック付き袋１００では、雄型咬合部１１と雌型咬合部１４とを係合したときに、図６（ａ）に示すように、雌型咬合部１４の内周面の全体が雄型咬合部１１の表面と接し（接し合う面を符号３０で示す。）、かつ、図６（ｂ）に示すように、雄型咬合部１１と雌型咬合部１４とを係合させないときに、チャックの長手方向の横断面において、雌型咬合部１４のカギ内側の最大間隔ｗ２が、雄型咬合部１１の最大幅ｗ１よりも小さいことが好ましい。このような構造とすることで、咬合部において気密性を高めることができる。 In the bag 100 with a chuck, when the male occlusal portion 11 and the female occlusal portion 14 are engaged with each other, as shown in FIG. 6A, the entire inner peripheral surface of the female occlusal portion 14 is the male occlusal portion. The chuck is in contact with the surface of the portion 11 (the contact surface is indicated by reference numeral 30), and as shown in FIG. 6 (b), when the male occlusal portion 11 and the female occlusal portion 14 are not engaged with each other. It is preferable that the maximum distance w2 inside the key of the female occlusal portion 14 is smaller than the maximum width w1 of the male occlusal portion 11 in the longitudinal cross section of the female occlusal portion 14. With such a structure, airtightness can be improved at the occlusal portion.

図２では上チャック２と下チャック３の雄型咬合部２１の雌型咬合部２４への差し込み方向が、逆となっている。このような逆関係としたが、チャック付き袋１００の開閉作業の力の入れ具合が均等化できるため好ましい。ただし、上チャック２と下チャック３の雄型咬合部２１の雌型咬合部２４への差し込み方向を同方向（不図示）としてもかまわない。 In FIG. 2, the directions of inserting the male occlusal portion 21 of the upper chuck 2 and the lower chuck 3 into the female occlusal portion 24 are opposite to each other. Although the relationship is reversed as described above, it is preferable because the force applied to the opening and closing work of the zipper bag 100 can be equalized. However, the insertion direction of the male occlusal portion 21 of the upper chuck 2 and the lower chuck 3 into the female occlusal portion 24 may be the same direction (not shown).

図７に、チャック付き袋１００において収容部４内が減圧状態のときのＡ−Ａ線断面図を示した。収容部４内が減圧状態のとき、下チャック３の収容部４側の端部において、減圧による応力３７により、雄基部１０と雌基部１３とが接近させられる。そして、支柱部１７ａは、減圧により、収容部４側に傾き、このときリブ１６ａによって、一定以上傾かないように支えられる。そして、収容部４の減圧状態が破られるまで支柱部１７ａはリブ１６ａに密着し続ける。すなわち、支柱部１７ａは弁の働きをする。また、収容部４がより減圧されると、下チャック３と上チャック２との間の空間も減圧状態になりやすく、このとき、上チャック２の収容部４側の端部において、減圧による応力３８により、雄基部２０と雌基部２３とが接近させられ、支柱部２７ａは、減圧により、収容部４側に傾き、このときリブ２６ａによって、一定以上傾かないように支えられる。このとき支柱部２７ａも弁の働きをする。 FIG. 7 is a cross-sectional view taken along the line AA of the bag 100 with a zipper when the inside of the housing portion 4 is in a decompressed state. When the inside of the accommodating portion 4 is in a decompressed state, the male base portion 10 and the female base portion 13 are brought close to each other by the stress 37 due to the decompression at the end portion of the lower chuck 3 on the accommodating portion 4 side. Then, the strut portion 17a is tilted toward the accommodating portion 4 due to the decompression, and at this time, the rib 16a is supported so as not to tilt more than a certain level. Then, the strut portion 17a continues to be in close contact with the rib 16a until the decompression state of the accommodating portion 4 is broken. That is, the strut portion 17a acts as a valve. Further, when the accommodating portion 4 is further depressurized, the space between the lower chuck 3 and the upper chuck 2 is likely to be in a decompressed state. The male base 20 and the female base 23 are brought close to each other by 38, and the support column 27a is tilted toward the accommodating portion 4 by decompression, and at this time, the rib 26a is supported so as not to tilt more than a certain level. At this time, the support column 27a also acts as a valve.

図８に、チャック付き袋１００において収容部４内が加圧状態のときのＡ−Ａ線断面図を示した。収容部４内が加圧状態のとき、下チャック３の収容部４側の端部において、加圧による応力３９により、雄基部１０と雌基部１３とが離れさせられ、反対に、下チャック３の開口部１側の端部において、雄基部１０と雌基部１３とが接近させられる。そして、支柱部１７ｂは、加圧により、開口部１側に傾き、このときリブ１６ｂによって、一定以上傾かないように支えられる。そして、収容部４の加圧状態が破られるまで支柱部１７ｂはリブ１６ｂに密着し続ける。すなわち、支柱部１７ｂは弁の働きをする。また、収容部４がより加圧されると、下チャック３と上チャック２との間の空間も加圧状態になりやすく、このとき、上チャック２の収容部４側の端部において、加圧による応力４０により、雄基部２０と雌基部２３とが離れさせられ、反対に、上チャック２の開口部１側の端部において、雄基部２０と雌基部２３とが接近させられる。支柱部２７ｂは、加圧により、開口部１側に傾き、このときリブ２６ｂによって、一定以上傾かないように支えられる。このとき支柱部２７ｂも弁の働きをする。 FIG. 8 shows a sectional view taken along line AA of the bag 100 with a zipper when the inside of the accommodating portion 4 is in a pressurized state. When the inside of the accommodating portion 4 is in a pressurized state, the male base portion 10 and the female base portion 13 are separated from each other by the stress 39 due to the pressurization at the end portion of the lower chuck 3 on the accommodating portion 4 side. At the end of the opening 1 side, the male base portion 10 and the female base portion 13 are brought close to each other. Then, the strut portion 17b is tilted toward the opening 1 side by pressurization, and at this time, the rib 16b is supported so as not to tilt more than a certain level. Then, the strut portion 17b continues to be in close contact with the rib 16b until the pressurized state of the accommodating portion 4 is broken. That is, the strut portion 17b acts as a valve. Further, when the accommodating portion 4 is further pressurized, the space between the lower chuck 3 and the upper chuck 2 is likely to be in a pressurized state. Due to the stress 40 due to the pressure, the male base portion 20 and the female base portion 23 are separated from each other, and conversely, the male base portion 20 and the female base portion 23 are brought close to each other at the end portion of the upper chuck 2 on the opening 1 side. The strut portion 27b is tilted toward the opening 1 side by pressurization, and is supported by the rib 26b so as not to tilt more than a certain level. At this time, the strut portion 27b also acts as a valve.

（変形例２）
チャック付き袋１００において、図９に示すように、チャックのうち少なくとも収容部４側のチャック３（図２に示すように上チャック２と下チャック３とを有する場合は下チャック３）について、収容部４側の支柱部１７ａの長さｔ１が開口部１側の支柱部１７ｂの長さｔ２よりも短いことが好ましい（ｔ１＜ｔ２）。図１０に、収容部４内が減圧状態のときの下チャック３の変形例２の断面拡大図を示した。収容部４内が減圧状態となっているときに、収容部４側のチャック３において、収容部４側の雄基部１０と雌基部１３とが接近しやすくなる。このとき、収容部４側のリブ１６ａの根元と支柱部１７ａの根元も接近する。上記構造を有することで、支柱部１７ａが傾いたときに支柱部１７ａは短い故に邪魔されずに支柱部１７ａの側面がリブ１６ａに接触しやすくなる。そうすると支柱部１７ａとリブ１６ａとの接触面積を大きくすることができ、減圧状態が破られるまでより高い気密性が得られやすくなる。一方、開口部１側の支柱部１７ｂも弁としての役割を果たし易くなる。すなわち、開口部１側の雄基部１０と雌基部１３とは離れやすくなるが、支柱部１７ａよりも長い支柱部１７ｂが収容部４側に傾いて雌型咬合部１４の外周面に密着し、減圧状態が破られるまでより高い気密性が得られやすくなる。 (Modification 2)
In the zipper-equipped bag 100, as shown in FIG. 9, at least the chuck 3 on the accommodating portion 4 side (the lower chuck 3 when the upper chuck 2 and the lower chuck 3 are provided as shown in FIG. 2) is accommodated. It is preferable that the length t1 of the strut portion 17a on the portion 4 side is shorter than the length t2 of the strut portion 17b on the opening 1 side (t1 <t2). FIG. 10 shows an enlarged cross-sectional view of a modified example 2 of the lower chuck 3 when the inside of the accommodating portion 4 is in a depressurized state. When the inside of the accommodating portion 4 is in a decompressed state, the male base portion 10 and the female base portion 13 on the accommodating portion 4 side tend to come close to each other in the chuck 3 on the accommodating portion 4 side. At this time, the root of the rib 16a on the accommodating portion 4 side and the root of the strut portion 17a also approach each other. With the above structure, when the strut portion 17a is tilted, the strut portion 17a is short, so that the side surface of the strut portion 17a easily comes into contact with the rib 16a without being disturbed. Then, the contact area between the support column 17a and the rib 16a can be increased, and higher airtightness can be easily obtained until the reduced pressure state is broken. On the other hand, the strut portion 17b on the opening 1 side also easily serves as a valve. That is, the male base portion 10 and the female base portion 13 on the opening 1 side are easily separated from each other, but the strut portion 17b longer than the strut portion 17a is tilted toward the accommodating portion 4 and comes into close contact with the outer peripheral surface of the female occlusal portion 14. It becomes easier to obtain higher airtightness until the decompressed state is broken.

（変形例３）
チャック付き袋１００において、図１１に示すように、チャックのうち少なくとも収容部４側のチャック３（図２に示すように上チャック２と下チャック３とを有する場合は下チャック３）について、収容部４側の支柱部１７ａの長さｔ１が収容部４側のリブ１６ａの長さｓ１よりも短いことが好ましい（ｔ１＜ｓ１）。図１２に、収容部４内が減圧状態のときの下チャック３の変形例３の断面拡大図を示した。収容部４内が減圧状態となっているときに、収容部４側のチャック３において、収容部４側の雄基部１０と雌基部１３とが接近しやすくなる。このとき、収容部４側のリブ１６ａの根元と支柱部１７ａの根元も接近する。上記構造を有することで、支柱部１７ａの先端が対向する雌基部１３とぶつかることなく傾いて支柱部１７ａの側面がリブ１６ａに接触することができる。そうすると支柱部１７ａとリブ１６ｂとの接触面積を大きくすることができ、減圧状態が破られるまでより高い気密性が得られやすくなる。 (Modification example 3)
In the zipper-equipped bag 100, as shown in FIG. 11, at least the chuck 3 on the accommodating portion 4 side (the lower chuck 3 when the upper chuck 2 and the lower chuck 3 are provided as shown in FIG. 2) is accommodated. It is preferable that the length t1 of the strut portion 17a on the portion 4 side is shorter than the length s1 of the rib 16a on the accommodating portion 4 side (t1 <s1). FIG. 12 shows an enlarged cross-sectional view of a modified example 3 of the lower chuck 3 when the inside of the accommodating portion 4 is in a depressurized state. When the inside of the accommodating portion 4 is in a decompressed state, the male base portion 10 and the female base portion 13 on the accommodating portion 4 side tend to come close to each other in the chuck 3 on the accommodating portion 4 side. At this time, the root of the rib 16a on the accommodating portion 4 side and the root of the strut portion 17a also approach each other. By having the above structure, the front end of the strut portion 17a can be tilted without colliding with the female base portion 13 facing the strut portion 17a, and the side surface of the strut portion 17a can come into contact with the rib 16a. Then, the contact area between the support column 17a and the rib 16b can be increased, and higher airtightness can be easily obtained until the reduced pressure state is broken.

（変形例４）
チャック付き袋１００において、図１３に示すように、チャックのうち少なくとも収容部４側のチャック３（図２に示すように上チャック２と下チャック３とを有する場合は下チャック３）について、収容部４側のリブ１６ａがその先端部に開口部１側に突出する突部３１を有し、収容部４が減圧状態のときに、突部３１が収容部４側の支柱部１７ａのくびれ３２に嵌まることが好ましい。図１４に、収容部４内が減圧状態のときの下チャック３の変形例４の断面拡大図を示した。収容部４内が減圧状態となっているときに、収容部４側のチャック３において、収容部４側の雄基部１０と雌基部１３とが接近しやすくなる。このとき、収容部４側のリブ１６ａの根元と支柱部１７ａの根元も接近するため、リブ１６ａの先端部に開口部１側に突出するように設けた突部３１と支柱部１７ａの根元部に設けたくびれ３２とがちょうど向き合う位置にくるため、嵌合する。上記構造を有することで、減圧状態が破られるまでより高い気密性が得られやすくなる。なお、上チャック２の収容部４側の支柱部２７ａ及びリブ２６ｂについても、同様の構造とすることが好ましい（不図示）。 (Modification example 4)
In the zipper-equipped bag 100, as shown in FIG. 13, at least the chuck 3 on the accommodating portion 4 side (the lower chuck 3 when the upper chuck 2 and the lower chuck 3 are provided as shown in FIG. 2) is accommodated. The rib 16a on the portion 4 side has a protrusion 31 protruding toward the opening 1 at its tip, and when the accommodating portion 4 is in a decompressed state, the protrusion 31 is a constriction 32 of the strut portion 17a on the accommodating portion 4 side. It is preferable to fit in. FIG. 14 shows an enlarged cross-sectional view of a modified example 4 of the lower chuck 3 when the inside of the accommodating portion 4 is in a depressurized state. When the inside of the accommodating portion 4 is in a decompressed state, the male base portion 10 and the female base portion 13 on the accommodating portion 4 side tend to come close to each other in the chuck 3 on the accommodating portion 4 side. At this time, since the root of the rib 16a on the accommodating portion 4 side and the root of the strut portion 17a also approach each other, the protrusion 31 and the root portion of the strut portion 17a provided at the tip of the rib 16a so as to project toward the opening 1 side. Since it comes to a position where the constriction 32 provided in the above is just facing each other, it is fitted. By having the above structure, it becomes easy to obtain higher airtightness until the depressurized state is broken. It is preferable that the support column portion 27a and the rib 26b on the accommodating portion 4 side of the upper chuck 2 have the same structure (not shown).

（変形例５）
チャック付き袋１００において、図１５に示すように、チャックのうち少なくとも収容部４側のチャック３（図２に示すように上チャック２と下チャック３とを有する場合は下チャック３）について、収容部４側のリブ１６ａの長さｓ１が開口部１側のリブ１６ｂの長さｓ２よりも短いことが好ましい（ｓ１＜ｓ２）。図１６に、収容部４内が減圧状態のときの下チャック３の変形例５の断面拡大図を示した。収容部４内が減圧状態となっているときに、収容部４側のチャック３において、収容部４側の雄基部１０と雌基部１３とが接近しやすくなる。このとき、収容部４側のリブ１６ａの根元と支柱部１７ａの根元とは接近する。一方、開口部１側のリブ１６ｂの根元と支柱部１７ｂの根元とは離れる。上記構造を有することで、収容部４内が減圧状態となっているときに、チャックのシールの解除がされにくくなるように、収容部４側のチャックにおいて、リブ１６ａとリブ１６ｂの長さが最適化され、その結果、収容部４側の雄基部１０と雌基部１３とが接近した状態を維持しやすい。なお、上チャック２のリブ２６ａとリブ２６ｂについても、同様の構造とすることが好ましい（不図示）。 (Modification 5)
In the zipper-equipped bag 100, as shown in FIG. 15, at least the chuck 3 on the accommodating portion 4 side (the lower chuck 3 when the upper chuck 2 and the lower chuck 3 are provided as shown in FIG. 2) is accommodated. It is preferable that the length s1 of the rib 16a on the portion 4 side is shorter than the length s2 of the rib 16b on the opening 1 side (s1 <s2). FIG. 16 shows an enlarged cross-sectional view of a modified example 5 of the lower chuck 3 when the inside of the accommodating portion 4 is in a depressurized state. When the inside of the accommodating portion 4 is in a decompressed state, the male base portion 10 and the female base portion 13 on the accommodating portion 4 side tend to come close to each other in the chuck 3 on the accommodating portion 4 side. At this time, the root of the rib 16a on the accommodating portion 4 side and the root of the strut portion 17a come close to each other. On the other hand, the root of the rib 16b on the opening 1 side and the root of the support column 17b are separated from each other. By having the above structure, the lengths of the ribs 16a and 16b in the chuck on the accommodating portion 4 side are set so that the seal of the chuck is not easily released when the inside of the accommodating portion 4 is in a decompressed state. It is optimized, and as a result, it is easy to maintain a state in which the male base portion 10 and the female base portion 13 on the accommodating portion 4 side are close to each other. It is preferable that the ribs 26a and 26b of the upper chuck 2 have the same structure (not shown).

（変形例６）
チャック付き袋１００において、図１７に示すように、雄部材１２は、雄型咬合部１１の両脇に一対のリブ１６ａ，１６ｂ（１６）を有し、雌部材１５は、雌型咬合部１４の両脇であって雄型咬合部１１と雌型咬合部１４とを係合したときにリブ１６ａ，１６ｂの内側となる位置に一対の支柱部１７ａ，１７ｂ（１７）を有し、一対の支柱部１７ａ，１７ｂのうち、少なくとも収容部側の支柱部１７ａが、根元部にくびれ１８を有し、かつ、収容部４が減圧状態のときに収容部４側に傾いて収容部４側のリブ１６ａに当接する形態としてもよい。チャック３を確実に嵌合させ、支柱部１７を所定の位置に配置し易くできる。 (Modification 6)
In the chucked bag 100, as shown in FIG. 17, the male member 12 has a pair of ribs 16a and 16b (16) on both sides of the male occlusal portion 11, and the female member 15 has the female occlusal portion 14 A pair of support columns 17a, 17b (17) are provided at positions inside the ribs 16a, 16b when the male occlusal portion 11 and the female occlusal portion 14 are engaged with each other on both sides of the above. Of the strut portions 17a and 17b, at least the strut portion 17a on the accommodating portion side has a constriction 18 at the root portion, and when the accommodating portion 4 is in a reduced pressure state, the strut portion 17a is tilted toward the accommodating portion 4 side and is on the accommodating portion 4 side. It may be in contact with the rib 16a. The chuck 3 can be securely fitted, and the support column 17 can be easily arranged at a predetermined position.

本実施形態に係るチャック付き袋では、図１８に示すように、包装袋８は、収容部４を形成する壁部に排気用の孔３３を有することが好ましい。収容部４を容易に減圧状態とすることができる。排気用の孔３３としては、排気後に、融着封止されうる孔、収容部４内を減圧状態に保持したまま栓がされうるストップバルブがついた孔、逆止弁がついた孔などを例示できる。排気される収容部４内の空気を符号３６で示した。収容部４を減圧状態にする手法としては、例えば、排気用の孔３３から収容部４内の空気を排気する方法、又は、収容部４に弾力性部材を内容物として、または内容物と共に収容し、弾力性部材の容積を小さくするように外圧をかけて、容積が小さいときにチャックを用いて袋を封止する。その後、外圧を解除すると弾力性部材が、その容積が大きくなるように膨らむことで、減圧状態となる。弾力性部材としては、例えば、スポンジ等の多孔性樹脂、不織布、繊維である。 In the bag with a zipper according to the present embodiment, as shown in FIG. 18, the packaging bag 8 preferably has an exhaust hole 33 in the wall portion forming the accommodating portion 4. The accommodating portion 4 can be easily decompressed. The holes 33 for exhaust include holes that can be fused and sealed after exhaust, holes with a stop valve that can be plugged while keeping the inside of the accommodating portion 4 in a depressurized state, and holes with a check valve. It can be illustrated. The air in the accommodating portion 4 to be exhausted is indicated by reference numeral 36. As a method of depressurizing the accommodating portion 4, for example, a method of exhausting the air in the accommodating portion 4 from the exhaust hole 33, or an elastic member is accommodated in the accommodating portion 4 as a content or together with the content. Then, an external pressure is applied so as to reduce the volume of the elastic member, and when the volume is small, the bag is sealed using a chuck. After that, when the external pressure is released, the elastic member expands so as to increase its volume, so that the elastic member is in a decompressed state. Examples of the elastic member include a porous resin such as a sponge, a non-woven fabric, and a fiber.

本実施形態に係るチャック付き袋では、液体、気体を入れることも可能である。チャック２，３が液漏れ、気体漏れを抑制する。このとき、支柱部１７，２７が、係合した雄型咬合部と雌型咬合部とともに、液漏れ、気体漏れを抑制する。 In the bag with a zipper according to the present embodiment, it is possible to put a liquid or a gas. Chuck 2 and 3 suppress liquid leakage and gas leakage. At this time, the support columns 17 and 27, together with the engaged male-type occlusal portion and female-type occlusal portion, suppress liquid leakage and gas leakage.

１００チャック付き袋
１開口部
２上チャック
３チャック（下チャック）
４収容部
５，６融着部
７内容物
８包装袋
１０，２０雄基部
１１，２１雄型咬合部
１２，２２雄部材
１３，２３雌基部
１４，２４雌型咬合部
１５，２５雌部材
１６ａ，１６ｂ（１６），２６ａ，２６ｂ（２６）リブ
１７ａ，１７ｂ（１７），２７ａ，２７ｂ（２７）支柱部
１８，２８，３２くびれ
１９支柱部の根元部のくびれがない部分
３０接し合う面
３１突部
３３排気用の孔
３４減圧によって収容部に外気が入ろうとする方向
３５減圧によって収容部の基材フィルムが内容物を圧縮する応力
３６排気される収容部内の空気
３７，３８減圧によって基材フィルムにかかる応力
３９，４０加圧によって基材フィルムにかかる応力
ｗ２雌型咬合部のカギ内側の最大間隔
ｗ１雄型咬合部の最大幅
ｔ１収容部側の支柱部の長さ
ｔ２開口部側の支柱部の長さ
ｓ１収容部側のリブの長さ
ｓ２開口部側のリブの長さ 100 Bag with zipper 1 Opening 2 Upper chuck 3 Chuck (lower chuck)
4 Containment part 5, 6 Fusion part 7 Contents 8 Packaging bag 10,20 Male base 11,21 Male occlusal part 12,22 Male member 13,23 Female base 14,24 Female occlusal part 15,25 Female member 16a , 16b (16), 26a, 26b (26) Ribs 17a, 17b (17), 27a, 27b (27) Struts 18, 28, 32 Constriction 19 Constriction at the base of the strut 30 Contact surface 31 Protrusion 33 Hole for exhaust 34 Direction in which outside air tries to enter the accommodating part due to decompression 35 Stress that the base film of the accommodating part compresses the contents due to decompression 36 Air in the accommodating part to be exhausted 37, 38 Base material due to decompression Stress applied to the film 39,40 Stress applied to the base film due to pressurization w2 Maximum spacing inside the key of the female occlusal part w1 Maximum width of the male occlusal part t1 Length of the strut on the accommodating part side t2 On the opening side Length of strut s1 Length of rib on accommodating part s2 Length of rib on opening side

Claims

It has a packaging bag having a housing portion and an opening, and a band-shaped chuck fixed to the inner wall side along the edge of the opening.
The chuck is provided with a male member having a band-shaped male base and a male occlusal portion projecting along the longitudinal direction of the male base, and a band-shaped female base projecting along the longitudinal direction of the female base. In a bag with a chuck having a female member having a female occlusal portion that engages with the male occlusal portion in a disengaged manner.
One of the male member and the female member has a pair of ribs on both sides of the male occlusal portion or the female occlusal portion, and the other has the male occlusal portion or the female occlusal portion. A pair of strut portions are provided on both sides of the rib at a position inside the rib when the male occlusal portion and the female occlusal portion are engaged with each other.
Of the pair of strut portions, at least the strut portion on the accommodating portion side has a constriction at the root portion, and when the accommodating portion is in a decompressed state, the strut portion is inclined toward the accommodating portion side and hits the rib on the accommodating portion side. A bag with a zipper that is characterized by contact.

The bag with a zipper according to claim 1, wherein the strut portion on the accommodating portion side has the constriction on both sides of the root portion or only on the accommodating portion side.

Two chucks, an upper chuck on the opening side and a lower chuck on the accommodating portion side, are provided along the edge of the opening.
The bag with a zipper according to claim 1 or 2, wherein at least the strut portion on the accommodating portion side of the lower chuck has a constriction at the root portion.

The bag with a zipper according to any one of claims 1 to 3, wherein the strut portion has a constriction at the root portion.

When the male occlusal portion and the female occlusal portion are engaged, the entire inner peripheral surface of the female occlusal portion is in contact with the surface of the male occlusal portion, and the male occlusal portion and the said When not engaged with the female occlusal portion, the maximum distance inside the key of the female occlusal portion is smaller than the maximum width of the male occlusal portion in the longitudinal cross section of the chuck. The bag with a chuck according to any one of claims 1 to 4.

The chuck according to any one of claims 1 to 5, wherein at least the chuck on the accommodating portion side has a length of a strut portion on the accommodating portion side shorter than the length of the strut portion on the opening side. Zipper bag.

The chuck according to any one of claims 1 to 6, wherein the length of the strut portion on the accommodating portion side is shorter than the length of the rib on the accommodating portion side at least for the chuck on the accommodating portion side. Bag with zipper.

Of the chucks, at least the chuck on the accommodating portion side has a rib on the accommodating portion side having a protrusion protruding toward the opening side at the tip thereof, and when the accommodating portion is in a decompressed state, the protruding portion is the accommodating portion. The bag with a zipper according to any one of claims 1 to 7, wherein the bag is fitted in the constriction of the support column on the side.

The chuck according to any one of claims 1 to 8, wherein at least the chuck on the accommodating portion side has a rib length on the accommodating portion side shorter than the length of the rib on the opening side. With a bag.

The female base portion has a pair of ribs on both sides of the female occlusal portion, and the male base portion is both sides of the male occlusal portion, and the male occlusal portion and the female occlusal portion are formed. The chucked bag according to any one of claims 1 to 9, wherein the pair of support columns are provided at positions inside the ribs when engaged.

The bag with a zipper according to any one of claims 1 to 10, wherein the packaging bag has an exhaust hole in a wall portion forming the accommodating portion.