JP6940922B2

JP6940922B2 - Disc tumbler lock for joinery and key for the disc tumbler lock for joinery

Info

Publication number: JP6940922B2
Application number: JP2017082614A
Authority: JP
Inventors: 田中　健一; 健一田中; 伸幸河合; 英樹森田
Original assignee: 美和ロック株式会社
Priority date: 2017-04-19
Filing date: 2017-04-19
Publication date: 2021-09-29
Anticipated expiration: 2037-04-19
Also published as: JP2018178624A

Description

本発明は建具用ディスクタンブラー錠に関し、特に可動障害子が外筒体の半径方向にスライドする方式の建具用ディスクタンブラー錠及び該建具用ディスクタンブラー錠用の鍵に関する。 The present invention relates to a disc tumbler lock for fittings, and more particularly to a disc tumbler lock for fittings in which a movable obstacle slides in the radial direction of the outer cylinder and a key for the disc tumbler lock for fittings.

特許文献１は、「タンブラー」と称される可動障害子が支軸を中心にして揺動する振り子式のロータリーディスクタンブラー錠である点で、本発明とは技術的原理が相違する。また特許文献２は、本発明と同様に可動障害子が直線移動するスライド方式のディスクタンブラー錠なので、本発明と技術的原理が同じである。これらの特許文献に記載の公知発明は、「鍵違いの増大化」を図ることができる点で、本発明の課題と一部共通するものの、錠前を構成する各部材が同一であっても、複数種類の可動障害子の配列を任意に変更することにより、鍵違いの増大化を得ることができる多種類のタンブラー錠を提供することができないという問題点がある。 Patent Document 1 differs from the present invention in the technical principle in that it is a pendulum type rotary disc tumbler lock in which a movable obstacle called a "tumbler" swings around a support shaft. Further, Patent Document 2 is a slide type disc tumbler lock in which the movable obstacle moves linearly as in the present invention, and therefore has the same technical principle as the present invention. Although the publicly known inventions described in these patent documents have some commonalities with the subject of the present invention in that they can "increase the key difference", even if the members constituting the lock are the same, There is a problem that it is not possible to provide a multi-type tumbler lock capable of obtaining an increase in key difference by arbitrarily changing the arrangement of a plurality of types of movable obstacles.

出願人は上記問題点を克服するために特許文献３を提案した。この特許文献３の段落００４２、段落００４７等には、図面（図３１など）と共に、可動障害子としての複数種類の環状ディスクタンブラーの設計変更例として、各環状ディスクタンブラーをそれぞれ左右或いは上下対称に二分割しても良い旨が記載されている。 The applicant has proposed Patent Document 3 in order to overcome the above problems. In paragraphs 0042, 0047, etc. of Patent Document 3, each annular disc tumbler is symmetrically arranged left and right or vertically as an example of design modification of a plurality of types of annular disc tumblers as movable obstacles, together with drawings (FIG. 31 and the like). It is stated that it may be divided into two.

しかしながら、この特許文献３の発明の課題は、外筒体或いは内筒体の軸線方向に少なくとも３種類の可動障害子の配列を任意に変更することにより、鍵違いの増大化を得ることができる多種類のタンブラー錠を提供することであることから、異なる形状の可動障害子を複数製造となければならない、また合鍵のタンブラー用誘導刻みも、前記３種類の可動障害子の各被誘導部分に対応して完全な窪み、谷型の刻み、縁部分の切欠溝等の３種類を形成しなければならないので、タンブラー錠及び鍵の製造コストがそれぞれ高くなるという問題点がある。そこで、現在、可動障害子を左右或いは上下対称に二分割する実施形態をさらに発展させ、「より一層の鍵違いの増大化」を図ることができると共に、二分割した可動障害子の形態を、極力一種類の形態に統一化することにより、タンブラー錠及び鍵の製造コストをそれぞれ低く抑えることが期待されている。 However, the subject of the invention of Patent Document 3 is that the key difference can be increased by arbitrarily changing the arrangement of at least three types of movable obstacles in the axial direction of the outer cylinder or the inner cylinder. Since it is to provide various types of tumbler locks, it is necessary to manufacture a plurality of movable obstacles having different shapes, and the induction notch for the tumbler of the master key is also provided for each guided portion of the above three types of movable obstacles. Correspondingly, it is necessary to form three types such as a complete depression, a valley-shaped notch, and a notched groove at the edge portion, so that there is a problem that the manufacturing cost of the tumbler lock and the key is high. Therefore, at present, it is possible to further develop the embodiment in which the movable obstacle child is divided into two parts horizontally or vertically symmetrically to "further increase the key difference", and at the same time, the form of the movable obstacle child divided into two parts can be described. It is expected that the manufacturing costs of tumbler locks and keys will be kept low by unifying them into one type as much as possible.

ところで、特許文献４には、ディスクタンブラー錠及び鍵に於いて、環状ディスクタンブラーを左右或いは上下対称に二分割すること、二分割された可動障害子の対向側の内端部の一部に傾斜状の被誘導部分（被係合面）を形成すること、可動障害子の前記傾斜状の被誘導部分に対応して、合鍵のブレートの側壁部に、該ブレートの平面部に相当する一側面から他側面にかけて傾斜状のタンブラー用誘導刻み（刻みタイプの傾斜状谷部）を形成することが記載されている。 By the way, in Patent Document 4, in the disc tumbler lock and the key, the annular disc tumbler is divided into two parts horizontally or vertically symmetrically, and is inclined to a part of the inner end portion on the opposite side of the divided movable obstacle. Forming a shaped portion to be guided (engaged surface), corresponding to the inclined guided portion of the movable obstacle, on the side wall portion of the tumbler lock of the master key, one side surface corresponding to the flat surface portion of the tumbler lock. It is described that an inclined tumbler inductive notch (a notched type inclined valley portion) is formed from the to the other side surface.

この特許文献４は、本発明の如く、二分割した可動障害子の形態を、それぞれ一種類の形態に統一化するので、タンブラー錠及び鍵の製造コストをそれぞれ低く抑えることができるものの、前記タンブラー用誘導刻みは、例えば特許文献５の図１に記載されたリバーシブルキーの如く、一側面から他側面にかけて傾斜状に形成された谷部なので、「より一層の鍵違いの増大化を図る」及び「より一層の複製が困難な合鍵を得る」という発明の課題を十分に満足させることができない。 In Patent Document 4, as in the present invention, the morphology of the movable impaired child divided into two is unified into one type, so that the manufacturing cost of the tumbler lock and the key can be suppressed to a low level, but the tumbler is described above. Since the guide tumbler lock is a valley portion formed in an inclined shape from one side surface to the other side surface like the reversible key described in FIG. 1 of Patent Document 5, "to further increase the key difference" and The problem of the invention of "obtaining a master key that is more difficult to duplicate" cannot be fully satisfied.

特許第４００８３０２号公報Japanese Patent No. 4008302 特開２０１１−７４６１３号公報Japanese Unexamined Patent Publication No. 2011-74613 特開２０１４−１５２５９３号公報Japanese Unexamined Patent Publication No. 2014-152595 実開昭６３−４４９６５号公報Jitsukaisho 63-44965 特開平９−１４４３９８号公報の図１FIG. 1 of JP-A-9-144398.

本発明の主たる目的は、特許文献３及び特許文献４の問題点に鑑み、二分割の可動障害子を備える建具用ディスクタンブラー錠及び該建具用ディスクタンブラー錠用の鍵に於いて、前記可動障害子の被誘導部分の構成と、合鍵のブレードに形成したタンブラー用誘導刻みの構成との組み合わせに工夫を凝らし、「より一層のピッキングの防止」、「より一層の鍵違いの増大化を図る」及び「より一層の複製が困難な合鍵を得る」ことである。第２の目的は、例えばタンブラー用誘導刻みの側壁部から平面部に至る複数の刻みの長さに変化を持たせることにより、ピッキングの防止という観点から、より安全性が高いディスクタンブラー錠及び複製が困難な鍵を得ることである。さらに、例えば合鍵の挿入時及び引き抜き時に可動障害子との摩擦抵抗を少なくする、タンブラー錠及び鍵の製造コストをそれぞれ低く抑える、同位置にタンブラー用誘導刻みを形成しても、合鍵のブレードは垂直に刻みを形成するものよりも強靭である等の目的は、構成要件によって特定される。 A main object of the present invention is, in view of the problems of Patent Documents 3 and 4, the movable obstacle in a disc tumbler lock for fittings having a movable obstacle in two parts and a key for the disc tumbler lock for fittings. By devising a combination of the configuration of the guided part of the child and the configuration of the tumbler induction notch formed on the blade of the master key, "further prevention of picking" and "further increase of key difference" And "getting a master key that is even more difficult to duplicate". The second purpose is to make disc tumbler locks and duplications with higher safety from the viewpoint of preventing picking by, for example, changing the lengths of a plurality of notches from the side wall portion to the flat portion of the inductive notch for tumbler. Is to get the difficult key. Further, for example, the frictional resistance with the movable obstacle when inserting and pulling out the key is reduced, the manufacturing cost of the tumbler lock and the key is kept low, and even if the guide notch for the tumbler is formed at the same position, the blade of the key can be used. Objectives, such as being tougher than those that form vertical knurls, are specified by the constituent requirements.

本発明の建具用ディスクタンブラー錠は、内周面の母線に沿ってロックカム溝を有する外筒体と、この外筒体に回動自在に嵌合すると共に、中心軸線に沿って形成されたキー孔及び半径方向の解錠切欠を有する内筒体と、この内筒体の外周面の母線に沿って延在し、前記ロックカム溝と係合する方向に付勢されたロッキングバーと、前記内筒体の各仕切り部の間に位置すると共に、タンブラーバネのバネ力に抗して半径方向にスライド自在であり、かつ合鍵のブレードに形成された大小のタンブラー用誘導刻みに対応して係合する被誘導部分を有する複数枚の可動障害子を備えた建具用ディスクタンブラー錠に於いて、前記可動障害子は、対向状態に二分割され、また前記被誘導部分は断面山形形状又は断面弧状面のいずれかであり、合鍵を挿入する前の初期状態に於いて、その内端部側の各対向面の一部の前記被誘導部分ａ、ｂの対向稜線部が、前記内筒体３の中心軸線Ｏを通る垂直線Ｖに対して傾斜状に形成され、一方、前記合鍵の前記タンブラー用誘導刻みは、前記ブレードの平面部の一側上面に側面部からブレードの幅方向に形成された窪み状の第１刻み７３ａと、この第１刻みのほぼ裏側位置に相当する前記ブレードの平面部の一側下面に形成された窪み状の第２刻み７３ｂであり、前記合鍵のブレードを前記キー孔に挿入すると、前記二分割の可動障害子は、それぞれ前記タンブラーバネのバネ力に抗して、かつ一対のガイド棒にそれぞれ同じ方向に案内されると共に、該可動障害子の被誘導部分が前記合鍵のタンブラー用誘導刻みに係合し、これにより二分割された可動障害子の外端部側の各解錠用受け入れ凹所が、前記ロッキングバーの内端部と一致し、以て、合鍵と共に内筒体を解錠方向へ回動させた時、前記ロックカム溝と前記ロッキングバーとの間に生じる楔作用により、内筒体が外筒体に対して相対回動することを特徴とする。 The disc tumbler lock for fittings of the present invention has an outer cylinder having a lock cam groove along a bus on the inner peripheral surface, and a key formed along the central axis while being rotatably fitted to the outer cylinder. An inner cylinder having a hole and an unlocking notch in the radial direction, a locking bar extending along the bus of the outer peripheral surface of the inner cylinder and urged in a direction to engage with the lock cam groove, and the inner part. It is located between each partition of the cylinder, is slidable in the radial direction against the spring force of the tumbler spring, and engages with the large and small tumbler induction notches formed on the blade of the master key. In a fitting disc tumbler lock having a plurality of movable obstacles having a guided portion, the movable obstacle is divided into two in a facing state, and the guided portion has a chevron-shaped cross section or an arc-shaped cross section. In the initial state before inserting the master key , the facing ridges of the guided portions a and b, which are a part of the facing surfaces on the inner end side thereof, are the inner cylinders 3. The guide notch for the tumbler of the master key is formed on one side upper surface of the flat surface portion of the blade in the width direction of the blade from the side surface portion. The recessed first notch 73a and the recessed second notch 73b formed on one side lower surface of the flat surface portion of the blade corresponding to the substantially back side position of the first notch, and the blade of the master key is the key. When inserted into the hole, the two-divided movable obstacles are each guided by the pair of guide rods in the same direction against the spring force of the tumbler spring, and the guided portion of the movable obstacles is guided. Each unlocking receiving recess on the outer end side of the movable obstacle, which is engaged with the tumbler guide notch of the master key and thus divided into two, coincides with the inner end of the locking bar. When the inner cylinder is rotated in the unlocking direction together with the key, the inner cylinder rotates relative to the outer cylinder due to the wedge action generated between the lock cam groove and the locking bar. do.

また本発明の建具用ディスクタンブラー錠用の鍵は、内周面の母線に沿ってロックカム溝を有する外筒体と、この外筒体に回動自在に嵌合すると共に、中心軸線に沿って形成されたキー孔及び半径方向の解錠切欠を有する内筒体と、この内筒体の外周面の母線に沿って延在し、前記ロックカム溝と係合する方向に付勢されたロッキングバーと、前記内筒体の各仕切り部の間に位置すると共に、タンブラーバネのバネ力に抗して半径方向にスライド自在であり、かつ合鍵のブレードに形成された大小のタンブラー用誘導刻みに対応して係合する被誘導部分を有する複数枚の可動障害子を備えた建具用ディスクタンブラー錠用の鍵に於いて、前記可動障害子は、対向状態に二分割され、また前記被誘導部分は断面山形形状又は断面弧状面のいずれかであり、合鍵を挿入する前の初期状態に於いて、その内端部側の各対向面の一部の前記被誘導部分ａ、ｂの対向稜線部が、前記内筒体３の中心軸線Ｏを通る垂直線Ｖに対して傾斜状に形成され、一方、前記合鍵の前記タンブラー用誘導刻みは、前記ブレードの平面部の一側上面に側面部からブレードの幅方向に形成された窪み状の第１刻み７３ａと、この第１刻みのほぼ裏側位置に相当する前記平面部の一側下面に形成された窪み状の第２刻み７３ｂであり、前記合鍵のブレードを前記キー孔に挿入すると、前記二分割の可動障害子は、それぞれ前記タンブラーバネのバネ力に抗して、かつ一対のガイド棒にそれぞれ同じ方向に案内されると共に、該可動障害子の被誘導部分が前記合鍵のタンブラー用誘導刻みに係合し、これにより二分割された可動障害子の外端部側の各解錠用受け入れ凹所が、前記ロッキングバーの内端部と一致し、以て、合鍵と共に内筒体を解錠方向へ回動させた時、前記ロックカム溝と前記ロッキングバーとの間に生じる楔作用により、内筒体が外筒体に対して相対回動することを特徴とする。 Further, the key for the disc tumbler lock for fittings of the present invention is rotatably fitted to an outer cylinder having a lock cam groove along the inner peripheral surface bus, and along the central axis. An inner cylinder having a formed key hole and a radial unlocking notch, and a locking bar extending along the bus line of the outer peripheral surface of the inner cylinder and urged in a direction to engage with the lock cam groove. It is located between each partition of the inner cylinder, is slidable in the radial direction against the spring force of the tumbler spring, and corresponds to the large and small tumbler induction notches formed on the blade of the master key. In a key for a fitting disc tumbler lock having a plurality of movable obstacles having a guided portion to be engaged with the movable obstacle, the movable obstacle is divided into two in a facing state, and the guided portion is divided into two. It has either a chevron shape or an arcuate cross section, and in the initial state before inserting the master key , the facing ridges of the guided portions a and b of a part of the facing surfaces on the inner end side thereof are , The inner cylinder 3 is formed so as to be inclined with respect to the vertical line V passing through the central axis O, while the tumbler guide notch of the master key is formed on one side upper surface of the flat surface portion of the blade from the side surface portion. A recess-shaped first notch 73a formed in the width direction of the above, and a recess-shaped second notch 73b formed on one side lower surface of the flat surface portion corresponding to a position substantially on the back side of the first notch. When the blade of the above is inserted into the key hole, the two-divided movable obstacles are each guided by the pair of guide rods in the same direction against the spring force of the tumbler spring, and the movable obstacles. The guided portion of the key is engaged with the guide notch for the tumbler of the master key, and each unlocking receiving recess on the outer end side of the movable obstacle divided into two is aligned with the inner end of the locking bar. Therefore, when the inner cylinder is rotated in the unlocking direction together with the key, the inner cylinder rotates relative to the outer cylinder due to the wedge action generated between the lock cam groove and the locking bar. It is characterized by doing.

（ａ）請求項１に記載の発明は、「可動障害子は、対向状態に二分割され、また前記被誘導部分は断面山形形状又は断面弧状面のいずれかであり、合鍵を挿入する前の初期状態に於いて、その内端部側の各対向面の一部の被誘導部分（ａ、ｂ）の対向稜線部が、内筒体（３）の中心軸線（Ｏ）を通る垂直線（Ｖ）に対して傾斜状に形成され、一方、合鍵のブレードに形成されたタンブラー用誘導刻みは、ブレードの平面部の一側上面に側面部からブレードの幅方向に形成された窪み状の第１刻みと、この第１刻みのほぼ裏側位置に相当する平面部の一側下面に形成された窪み状の第２刻みを有するので」、二分割の可動障害子を備えるディスクタンブラー錠に於いて、合鍵をキー孔に挿入した時、前記二分割の可動障害子は、各タンブラーバネのバネ力に抗して、かつ一対のガイド棒にそれぞれ同じ方向に案内されない限り、該可動障害子の被誘導部分が前記合鍵のタンブラー用誘導刻みに係合し、これにより二分割の可動障害子の外端部側の各解錠用受け入れ凹所が、ロッキングバーの内端部（好ましくはその係合板部分）とそれぞれ同時に一致しないので、内筒体を解錠方向へ回転させることができない。したがって、「より一層のピッキングの防止」、「より一層の鍵違いの増大化を図る」及び「より一層の複製が困難な合鍵を得る」ことができる。「より一層のピッキングの防止」について付言すると、二分割の可動障害子の被誘導部分は、例えば「ハの字状」或いは「楔状」の格好で合鍵のタンブラー用誘導刻みの窪み状の第１刻み及び第２刻みを待ち構えているので、不正解錠工具（ピッキングツール）の先端が被誘導部分の傾斜面に対して滑り、その結果、ピッキングの防止に寄与する。さらに、例えば合鍵の挿入時及び引き抜き時に可動障害子との摩擦抵抗を少なくするという発明の課題を達成することができる。
（ｂ）請求項２に記載の発明は、「可動障害子は、対向状態に二分割され、また前記被誘導部分は断面山形形状又は断面弧状面のいずれかであり、合鍵を挿入する前の初期状態に於いて、その内端部側の各対向面の一部の被誘導部分（ａ、ｂ）の対向稜線部が、内筒体（３）の中心軸線（Ｏ）を通る垂直線（Ｖ）に対して傾斜状に形成され、一方、合鍵のブレードに形成されたタンブラー用誘導刻みは、ブレードの平面部の一側上面に側面部からブレードの幅方向に形成された窪み状の第１刻みと、この第１刻みのほぼ裏側位置に相当する平面部の一側下面に窪み状の第２刻みを有するので」、鍵の構成として、合鍵のタンブラー用誘導刻みは、ブレードの平面部の一側上面に側面部からブレード幅方向（鍵幅方向）に形成された窪み状の第１刻みと、この第１刻みのほぼ裏側位置に相当する前記平面部の一側下面に形成された窪み状の第２刻みであり、これらの第１刻み及び第２刻みは、可二分割の可動動障害子の各対向面の一部に形成された一対の傾斜状の被誘導部分にそれぞれ対応していることから、「より一層の複製が困難な合鍵を得る」ことができる。さらに、例えば合鍵の挿入時及び引き抜き時に可動障害子との摩擦抵抗を少なくするという発明の課題を達成することができる。
その他、例えばタンブラー用誘導刻みの第２刻の斜辺の長さは、第１刻みの斜辺の長さよりも短い（異なる刻みである）ので、合鍵の挿入時、該合鍵のタンブラー用誘導刻みによって、外筒体の内周面の一部から離れるようにリフトアップされた或いは位置変位した二分割の可動障害子は、それぞれ移動量が異なるので、ピッキングの防止という観点から、より安全性が高いディスクタンブラー錠及び複製が困難な鍵を得ることができる。また合鍵のタンブラー用誘導刻みの第２刻みの斜辺の長さが、第１刻みの斜辺の長さと略同じ（同等の刻み）である実施形態の場合には、前記（ａ）で述べた通り、ピッキングの防止の向上を図ることができる。また合鍵のタンブラー用誘導刻みの構造について、第２刻みの斜辺の長さが第１刻みの斜辺の長さよりも短いもの（異なる刻み）と、第２刻みの斜辺の長さが第１刻みの斜辺の長さと略同じもの（同等の刻み）の二種類が、内筒の中心軸線に沿って組み込まれている実施形態の場合には、「より一層のピッキングの防止」、「より一層の鍵違いの増大化を図る」及び「より一層の複製が困難な合鍵を得る」というそれぞれの観点から、好ましい効果を得ることができる。また二分割の可動障害子の中には、複数の解錠用受け入れ凹所を有する可動障害子が含まれている実施形態の場合には、単数と複数の解錠用受け入れ凹所を有する可動障害子を任意に組み合わせることが可能となる。したがって、製造段階で、ピッキングの防止という観点から、より安全性が高いディスクタンブラー錠を提供することができる。さらに、二分割された可動障害子の幅広側壁は、外観上ほぼ小舟形状であり、船首に相当する一端部は、外筒体の内周面の一部の曲率に合うように弧状に形成され、前記一端部と反対側の船尾に相当する他端部にはタンブラーバネの一端部を支持するバネ端支持部が設けられ、該他端部の内端部側に前記タンブラーバネの伸縮方向に沿って内筒体に設けた案内部に案内される指状突起部を設け、前記指状突起部の内側縁に被誘導部分が形成され、前記内端部と反対側の外端部に解錠用受け入れ凹所が形成されている実施形態の場合には、外筒体の内周面の一部、タンブラーバネ及びロッキングバーの内端部側の係合板部分に対して対応するように内筒体に簡単に組み込むことができる。 (A) The invention according to claim 1 states that "the movable obstacle is divided into two in a facing state, and the guided portion has either a mountain-shaped cross section or an arc-shaped cross-section, and the key is not inserted. In the initial state, the facing ridges of some of the guided surfaces (a, b) on the inner end side of the facing surfaces are vertical lines (O) passing through the central axis (O) of the inner cylinder (3). The tumbler inductive notch formed on the blade of the master key is formed in an inclined shape with respect to V), and the tumbler inductive notch formed on the upper surface of one side of the flat surface of the blade is a recessed shape formed in the width direction of the blade from the side surface. Since it has one step and a recessed second step formed on one side lower surface of the flat surface portion corresponding to the position on the back side of the first step, "in a disc tumbler lock having a movable obstacle divided into two parts." When the master key is inserted into the key hole, the two-divided movable obstacle is covered by the movable obstacle unless it resists the spring force of each tumbler spring and is guided in the same direction by a pair of guide rods. The guide portion engages with the tumbler guide notch of the master key, whereby each unlocking receiving recess on the outer end side of the two-part movable obstacle is located at the inner end of the locking bar (preferably its engagement plate). Since they do not match each other at the same time, the inner cylinder cannot be rotated in the unlocking direction. Therefore, it is possible to "further prevent picking", "further increase the key difference", and "obtain a master key that is more difficult to duplicate". To add to "further prevention of picking", the guided part of the two-piece movable obstacle is, for example, "H-shaped" or "wedge-shaped", and is the first indented dent for the tumbler of the master key. Since the knurling and the second knurling are awaited, the tip of the tamper-unlocking tool (picking tool) slides against the inclined surface of the guided portion, and as a result, contributes to the prevention of picking. Further, for example, it is possible to achieve the problem of the invention of reducing the frictional resistance with the movable obstacle when inserting and pulling out the master key.
(B) The invention according to claim 2 states that "the movable obstacle is divided into two in a facing state, and the guided portion has either a mountain-shaped cross section or an arc-shaped cross-section, and the master key is not inserted. In the initial state, the facing ridges of a part of the guided surfaces (a, b) on the inner end side of the facing surfaces are vertical lines (O) passing through the central axis (O) of the inner cylinder (3). The tumbler inductive notch formed on the blade of the master key is formed in an inclined shape with respect to V), while the tumbler-shaped indentation formed on one side upper surface of the flat portion of the blade is formed in the width direction of the blade from the side surface portion. Since there is one step and a recessed second step on one side lower surface of the flat surface portion corresponding to the position on the back side of the first step, "as a key configuration, the guide step for the tumbler of the master key is the flat surface portion of the blade. It was formed on one side upper surface of the recessed first notch formed in the blade width direction (key width direction) from the side surface portion, and on one side lower surface of the flat surface portion corresponding to substantially the back side position of the first notch . It is a recessed second step, and these first and second steps correspond to a pair of inclined guided portions formed on a part of each facing surface of the divisible movable movement obstacle. Therefore, it is possible to "obtain a master key that is more difficult to duplicate". Further, for example, it is possible to achieve the problem of the invention of reducing the frictional resistance with the movable obstacle when inserting and pulling out the master key.
In addition, for example, the length of the hypotenuse of the second step of the tumbler induction step is shorter than the length of the hypotenuse of the first step (different steps). The two-piece movable obstacle that has been lifted up or displaced so as to be separated from a part of the inner peripheral surface of the outer cylinder has a different amount of movement, so it is a safer disc from the viewpoint of preventing picking. You can get tumbler locks and keys that are difficult to duplicate. Further, in the case of the embodiment in which the length of the hypotenuse of the second step of the induction step for the tumbler of the master key is substantially the same (equivalent step) as the length of the hypotenuse of the first step, as described in (a) above. , It is possible to improve the prevention of picking. Regarding the structure of the induction step for the tumbler of the master key, the length of the hypotenuse of the second step is shorter than the length of the hypotenuse of the first step (different step), and the length of the hypotenuse of the second step is the first step. In the case of the embodiment in which two types having substantially the same length of the hypotenuse (equal notches) are incorporated along the central axis of the inner cylinder, "further prevention of picking" and "further key". From the viewpoints of "increasing the difference" and "obtaining a master key that is more difficult to duplicate", favorable effects can be obtained. Further, in the case of the embodiment in which the movable obstacles having a plurality of unlocking receiving recesses are included in the two-divided movable obstacles, the movable obstacles having a single unlocking receiving recess and a plurality of unlocking receiving recesses are included. It is possible to combine obstacles arbitrarily. Therefore, it is possible to provide a more safe disc tumbler lock from the viewpoint of preventing picking at the manufacturing stage. Further, the wide side wall of the movable obstacle divided into two is almost in the shape of a small boat in appearance, and one end corresponding to the bow is formed in an arc shape so as to match the curvature of a part of the inner peripheral surface of the outer cylinder. A spring end support portion for supporting one end portion of the tumbler spring is provided at the other end portion corresponding to the stern on the opposite side of the one end portion, and the inner end portion side of the other end portion is provided in the expansion / contraction direction of the tumbler spring. A finger-shaped protrusion guided by a guide portion provided on the inner cylinder is provided along the line, a guided portion is formed on the inner edge of the finger-shaped protrusion, and the outer end portion opposite to the inner end portion is disengaged. In the case of the embodiment in which the receiving recess for locking is formed, the inner part of the inner peripheral surface of the outer cylinder, the tumbler spring, and the engaging plate part on the inner end side of the locking bar correspond to the inner part. It can be easily incorporated into the cylinder.

図１乃至図１２は本発明の第１実施形態を示す各説明図。図１３至図１５は本発明の他の実施形態を示す各説明図。
使用態様の一例を示す外観斜視図。図１で示したタンブラー錠Ｘの中心軸線０を含む面で切断した概略縦断面図。合鍵の挿入方向Ａに直交する面(正面視)で切断した概略縦断面図（二分割した可動障害子が見える初期位置の状態）。外筒体の概略断面図。内筒体を構成する主たる部材の概略説明図。可動障害子の横にした状態の正面図。ブレードを有する合鍵の正面図。ブレードを有する合鍵の平面図。タンブラー用誘導刻みの切断端面の断面形状及び表側の斜辺の長さと裏側の斜辺の長さが相違する旨（特徴部分）を示す説明図（図７の９−９線の箇所を参照）。合鍵をキー孔に挿入した説明図（図２に於いて、合鍵を水平状態に差し込んだ場合）。合鍵をキー孔に挿入した状態の説明図（タンブラー用誘導刻みの表側の斜辺と裏側の斜辺の稜線部が内筒体の中心軸線と交差する垂直線から外側に外れている説明も含む）。内筒体が外筒体に対して相対回動する旨の説明図。第２実施形態（可動障害子の組み合わせの例）の説明図。第３実施形態（可動障害子の組み合わせの例）の説明図。第４実施形態（タンブラー用誘導刻みの断面形状及び表側の斜辺の長さと裏側の斜辺の長さがほぼ同じである旨（特徴部分）を示す説明図。 1 to 12 are explanatory views showing the first embodiment of the present invention. 13 to 15 are explanatory views showing another embodiment of the present invention.
The external perspective view which shows an example of the usage mode. FIG. 3 is a schematic vertical cross-sectional view cut along a plane including the central axis 0 of the tumbler lock X shown in FIG. A schematic vertical cross-sectional view cut along a plane (front view) orthogonal to the insertion direction A of the master key (state in the initial position where the movable obstacle divided into two can be seen). Schematic cross-sectional view of the outer cylinder. Schematic diagram of the main members constituting the inner cylinder. Front view of the movable obstacle child lying down. Front view of a master key with a blade. Top view of the master key with blades. Explanatory drawing (see line 9-9 of FIG. 7) which shows the cross-sectional shape of the cut end face of a tumbler inductive notch, and the difference between the length of the hypotenuse on the front side and the length of the hypotenuse on the back side (feature portion). Explanatory drawing in which the master key is inserted into the key hole (when the master key is inserted in a horizontal state in FIG. 2). Explanatory drawing of the state where the master key is inserted into the key hole (including the explanation that the ridges of the hypotenuse on the front side and the hypotenuse on the back side of the guide notch for the tumbler deviate outward from the vertical line intersecting the central axis of the inner cylinder). The explanatory view that the inner cylinder body rotates relative to the outer cylinder body. Explanatory drawing of 2nd Embodiment (example of combination of movable obstacle child). Explanatory drawing of 3rd Embodiment (example of combination of movable obstacle child). The fourth embodiment (the cross-sectional shape of the induction step for a tumbler and the length of the hypotenuse on the front side and the length of the hypotenuse on the back side are substantially the same (feature portion).

図１乃至図１２は、本発明の第１実施形態のディスクタンブラー錠Ｘ（以下、ここでは「タンブラー錠」という。）及び該タンブラー錠用の鍵の各説明図である。図１は本発明のタンブラー錠Ｘを扉１の壁部１ａに取り付け、それと共に合鍵Ｙを示した外観斜視図である。まずこの図１に於いて、Ｘはタンブラー錠で、このタンブラー錠Ｘは合鍵Ｙの操作力により、複数の部材を組み合わせて形成された内筒体３が長筒状の外筒体２に対して相対回動する。 1 to 12 are explanatory views of a disc tumbler lock X (hereinafter, referred to as “tumbler lock”) according to the first embodiment of the present invention and a key for the tumbler lock. FIG. 1 is an external perspective view showing a tumbler lock X of the present invention attached to a wall portion 1a of a door 1 and a master key Y together with the tumbler lock X. First, in FIG. 1, X is a tumbler lock, and the tumbler lock X has an inner cylinder 3 formed by combining a plurality of members by the operating force of the master key Y with respect to a long cylinder outer cylinder 2. Relative rotation.

実施形態では、扉１（例えば、住宅の扉）の壁部１ａにタンブラー錠Ｘが水平状態に固着され、前記内筒体３を構成する錠先端部４に化粧カバー５が外嵌合している。 In the embodiment, the tumbler lock X is horizontally fixed to the wall portion 1a of the door 1 (for example, the door of a house), and the decorative cover 5 is externally fitted to the lock tip portion 4 constituting the inner cylinder 3. There is.

図１で示すように、キー孔６を有する錠先端部４及び化粧カバー５は、壁部１ａの外壁面から突出している。また内筒体３を構成する錠後端部７は、外筒体２あるいは内筒体３の軸線０上に位置するテールピース（出力片）８を有している。なお、符号Ａは合鍵Ｙの挿入方向である。図２は図１で示したタンブラー錠Ｘの中心軸線０を含む面で切断した概略縦断面図である。一方、図３は合鍵Ｙの挿入方向Ａに直交する面で切断した概略縦断面図である。図２及び図３を参照してタンブラー錠Ｘの基本的な構成部材を説明する。
まず、本発明のタンブラー錠Ｘは、内筒体の中心軸方向に所定間隔を有して二列状態に配設された二分割の左右或いは上下の可動障害子Ｚを有する点、また本発明のディスクタンブラー錠の鍵は、前記二分割の可動障害子Ｚのブレート用嵌挿孔を形成する各対向面に設けた傾斜状の各被誘導部分に対応する鍵幅方向の断面が、ほぼ山形のタンブラー用誘導刻みである点に特徴がある（特徴点）。 As shown in FIG. 1, the lock tip portion 4 and the decorative cover 5 having the key hole 6 project from the outer wall surface of the wall portion 1a. Further, the lock rear end portion 7 constituting the inner cylinder body 3 has a tail piece (output piece) 8 located on the axis 0 of the outer cylinder body 2 or the inner cylinder body 3. The reference numeral A is the insertion direction of the master key Y. FIG. 2 is a schematic vertical cross-sectional view of the tumbler lock X shown in FIG. 1 cut along a surface including the central axis 0. On the other hand, FIG. 3 is a schematic vertical cross-sectional view cut along a plane orthogonal to the insertion direction A of the master key Y. The basic components of the tumbler lock X will be described with reference to FIGS. 2 and 3.
First, the tumbler lock X of the present invention has two divided left and right or upper and lower movable obstacles Z arranged in two rows with a predetermined interval in the central axis direction of the inner cylinder, and the present invention. The key of the disc tumbler lock has a substantially chevron-shaped cross section in the key width direction corresponding to each inclined guided portion provided on each facing surface forming the blade fitting / insertion hole of the two-divided movable obstacle Z. It is characterized by the fact that it is an inductive notch for tumblers (feature points).

前述したように、２は長筒状の外筒体で、この外筒体の内周面２ａには、該外筒体２の母線に沿ってロックカム溝１１が形成されている（図２，図４参照）。図４を基準にすると、一部略ハの字形あるいは略逆ハの字形の一対のロックカム溝１１が外筒体の母線に沿って、かつ外筒体２或いは内筒体３の中心軸線０を基準にして上下の中心部に対称に形成されている。実施形態では外筒体２の上下にロックカム溝１１、１１が設けられていることから、これに対応して一対のロッキングバー１２、１２が上下に配設されている。 As described above, reference numeral 2 denotes a long cylindrical outer cylinder, and a lock cam groove 11 is formed on the inner peripheral surface 2a of the outer cylinder along the generatrix of the outer cylinder 2 (FIGS. 2 and 2). (See FIG. 4). With reference to FIG. 4, a pair of lock cam grooves 11 having a substantially C-shape or a substantially inverted C-shape form a central axis 0 of the outer cylinder 2 or the inner cylinder 3 along the generatrix of the outer cylinder. It is formed symmetrically in the upper and lower central parts with reference to it. In the embodiment, since the lock cam grooves 11 and 11 are provided above and below the outer cylinder 2, a pair of locking bars 12 and 12 are arranged above and below correspondingly.

図３で示すように、左右のロッキングバー１２は、外筒体２の各ロックカム溝１１に対して係脱する外側の尖頭部１２ａと、この尖頭部に連設形成された内側の係合部としての係合板部分１２ｂとから成り、内筒体３の外周端部に形成された該内筒体の解錠切欠１３に適宜に組み込まれている。そして、図２で示すように、例えば内筒体３の錠先端部４側（後方）に配設された前側の付勢バネ１４と、錠後端部７側（前方）に配設された後側の付勢バネ１４により、各ロッキングバー１２は内筒体３の半径外方向にそれぞれ常時付勢されている。したがって、各ロッキングバー１２は、常態では、それぞれ複数の付勢バネ１４、１４により、各外側の尖頭部１２ａが外筒体２の各ロックカム溝１１、１１に係合している。 As shown in FIG. 3, the left and right locking bars 12 have an outer cusp 12a that engages with and disengages from each lock cam groove 11 of the outer cylinder 2, and an inner rim 12a that is integrally formed with the cusp. It is composed of an engaging plate portion 12b as a joint portion, and is appropriately incorporated in an unlocking notch 13 of the inner cylinder body formed at the outer peripheral end portion of the inner cylinder body 3. Then, as shown in FIG. 2, for example, the front urging spring 14 arranged on the lock tip 4 side (rear) of the inner cylinder 3 and the lock rear end 7 side (front) are arranged. Each locking bar 12 is constantly urged in the direction outside the radius of the inner cylinder 3 by the urging spring 14 on the rear side. Therefore, in the normal state, each locking bar 12 has a plurality of urging springs 14, 14 so that the outer cusps 12a are engaged with the lock cam grooves 11 and 11 of the outer cylinder 2.

次に図５は、主に内筒体３を構成する部材を、説明の便宜上、適宜に判り易く示した概略説明図である。実施形態の内筒体３は、中心部にキー孔６を有する錠先端部４と、出力突起片としてのテールピース８を中心部に有する錠後端部７と、この錠後端部７と前記錠先端部４との間に設けられ、かつ該軸線方向と直交する複数の仕切板（或いは仕切り部）１６によって区画形成される複数のタンブラー収容部２７並びに複数のタンブラーバネ用収容部２８、不番の仕切板用スロット、可動障害子用の一対の板状案内部１０，１０、軸線方向の解錠切欠１３等を有すると共に、断面弧状の上下或いは左右の分割体を複数の仕切板等を介して長筒状に形成された内筒本体１５と、この内筒本体に中心軸線方向に沿って列状に併設されていると共に、該軸線方向と直交し、かつ前記タンブラー収容部２７及びタンブラーバネ収容部２８を形成する複数の円形或いはトラック形状の仕切板１６と、前記内筒本体１５の一端開口２７ａから差し込まれた前記仕切板１６の連結孔１８を貫通して前記錠先端部４及び錠後端部７に架設された一対の所定長の連結棒１９とから成る。 Next, FIG. 5 is a schematic explanatory view showing the members mainly constituting the inner cylinder 3 in an appropriate and easy-to-understand manner for convenience of explanation. The inner cylinder 3 of the embodiment includes a lock tip portion 4 having a key hole 6 in the center portion, a lock rear end portion 7 having a tail piece 8 as an output protrusion piece in the center portion, and the lock rear end portion 7. A plurality of tumbler accommodating portions 27 and a plurality of tumbler spring accommodating portions 28, which are provided between the lock tip portion 4 and are partitioned by a plurality of partition plates (or partition portions) 16 orthogonal to the axial direction. It has slots for unnumbered partition plates, a pair of plate-shaped guides 10 and 10 for movable obstacles, unlocking notches 13 in the axial direction, etc., and has a plurality of partition plates, etc. The inner cylinder main body 15 formed in a long tubular shape via the above, and the inner cylinder main body are provided in a row along the central axis direction, orthogonal to the axis direction, and the tumbler accommodating portion 27 and the tumbler accommodating portion 27. The lock tip portion 4 penetrates through a plurality of circular or track-shaped partition plates 16 forming the tumbler spring accommodating portion 28 and a connecting hole 18 of the partition plate 16 inserted from one end opening 27a of the inner cylinder main body 15. It is composed of a pair of connecting rods 19 having a predetermined length erected on the rear end portion 7 of the lock.

ここで、図２、図３及び図５を参照にして、さらに内筒体３の構成を説明する。まず図３及び図５を参照にすると、錠先端部４は、短筒状のヘッド部分４ａと、このヘッド部分４ａに連設する環状のフランジ部分４ｂを有し、前述したようにその中心部にキー孔６が形成されている。キー孔６の形状や大きさは、合鍵ＹのブレードＢに対応して適宜に形成されている。そして、前記ヘッド部分４ａの先端面は、前記キー孔６に向かってすり鉢形状に形成された案内曲面となっている。また、前記キー孔６の同心円上には、錠先端部４の後端面から内部に向かって所定長の前支持孔２５が形成されている。実施形態では二本の連結棒１９を用いているので、図２を基準にすると、前支持孔２５は所定間隔を有して上下に一対設けられている。 Here, the configuration of the inner cylinder 3 will be further described with reference to FIGS. 2, 3 and 5. First, referring to FIGS. 3 and 5, the lock tip portion 4 has a short cylindrical head portion 4a and an annular flange portion 4b connected to the head portion 4a, and as described above, the central portion thereof. A key hole 6 is formed in the. The shape and size of the key hole 6 are appropriately formed corresponding to the blade B of the master key Y. The tip surface of the head portion 4a is a guide curved surface formed in a mortar shape toward the key hole 6. Further, on the concentric circles of the key hole 6, a front support hole 25 having a predetermined length is formed from the rear end surface of the lock tip portion 4 toward the inside. Since two connecting rods 19 are used in the embodiment, a pair of front support holes 25 are provided one above the other with a predetermined interval based on FIG. 2.

次に図２を参照にすると、２６は環状の防御プレートで、この防御プレート２６は適宜に焼き入れされていると共に、その中心部にキー孔６と一致する不番の中心孔、その中心部寄りの部位に前述したガイド棒用の不番の挿通孔等が適宜に形成されている。なお、防御プレート２６も本発明の課題との関係では、発明の本質的事項ではない。この防御プレート２６は、例えば内筒本体１５の先端部の上方に形成された長孔状の切欠部分を介して内筒本体１５内に組み込まれる。 Next, referring to FIG. 2, reference numeral 26 denotes an annular protective plate, which is appropriately hardened and has an unnumbered central hole corresponding to the key hole 6 at the center thereof, and the central portion thereof. The above-mentioned unnumbered insertion holes for the guide rod and the like are appropriately formed in the near portion. The protective plate 26 is also not an essential matter of the invention in relation to the subject of the present invention. The protective plate 26 is incorporated into the inner cylinder main body 15 via, for example, an elongated hole-shaped notch formed above the tip end portion of the inner cylinder main body 15.

ここで初期位置を示す図３を基準にすると、内筒本体１５は、ハッチングで示した左右の段差状実体部分１５ａ、１５ａを除き、上方外周の開口側の一端部が幅広く、一方、下方外周の開口或いは非開口の他端部が幅狭であり、内筒体３（内筒本体１５）の中心軸線Ｏを通る垂直線Ｖ上に位置する可動障害子用の上下の板状案内部１０，１０を基準にすると、左右一対のタンブラー収容部２７、２７を有している。これらのタンブラー収容部２７には、その一端開口２７ａから左右一対の可動障害子Ｚが適宜に組み込まれる。図２で示すように、７枚（分割の可動障害子Ｚは、全部で１４枚）の可動障害子Ｚは、複数のトラック形状或いは円形の仕切板１６を介して中心軸線Ｏ方向に列状に配設されている。もちろん、可動障害子Ｚの数は、任意に設計変更できる事項である。 Here, based on FIG. 3 showing the initial position, the inner cylinder main body 15 has a wide one end on the opening side of the upper outer circumference, except for the left and right stepped body portions 15a and 15a shown by hatching, while the lower outer circumference. The other end of the opening or non-opening is narrow, and the upper and lower plate-shaped guide portions 10 for the movable obstacle located on the vertical line V passing through the central axis O of the inner cylinder body 3 (inner cylinder main body 15). , 10 are used as a reference, and a pair of left and right tumbler accommodating portions 27, 27 are provided. A pair of left and right movable obstacles Z are appropriately incorporated into these tumbler accommodating portions 27 from one end opening 27a. As shown in FIG. 2, the seven movable obstacles Z (the total number of the divided movable obstacles Z is 14) are arranged in a row in the central axis O direction via a plurality of track-shaped or circular partition plates 16. It is arranged in. Of course, the number of movable obstacles Z is a matter that can be arbitrarily changed in design.

しかして、１３は内筒本体１５の上下部或いは左右部に対称的に形成された一対の解錠切欠で、これらの解錠切欠１３は前述した上下或いは左右の実体部分１５ａ、１５ａの中央部に半径内方向に向かって形成され、一対のロッキングバー１２の尖端部１２ａをそれぞれ嵌合案内する。２８はタンブラー収容部２７内の適宜箇所（図３では、左右の実体部分１５ａ、１５ａの段差状下端部分）に形成されたバネ端支持面を有する左右一対のタンブラーバネ収容部で、これらのタンブラーバネ収容部２８は、左右の段差状実体部分１５ａ、１５ａの内側に対向して垂直方向或いは水平方向に一対設けられている。
次に同様に図５を参照にして仕切部１６を説明する。なお、仕切部１６の構成に関して、設計如何によっては内筒本体１５の内側に壁を設けて仕切り、或いは内筒本体１５の内側に仕切板１６を設けることができるので、ここでは仕切りに相当する前記壁や仕切板を「仕切部１６」の概念に含めることにする。また仕切部１６の形状に関して、円形や楕円形に形成し、内筒本体１５の解錠切欠１３と一致する仕切板解錠切欠を形成しても良いが、実施形態では、外観上、図５で示すようなトラック形状に形成している。また複数の仕切板１６を内筒本体１５自体に一体形成しても良い。本実施形態では、出願人が提案した特許第４００８３０２号の特許発明（図３、図４）と同様に、内筒本体１５と仕切板１６は別個の部材であり、二つの弧状分割片を一体的に組み合わせて内筒本体１５を形成した後に、該内筒本体１５に多数の仕切板１６を一体的に組み込み、タンブラー収容部２７を区画形成している。 13 is a pair of unlocking notches formed symmetrically on the upper and lower portions or the left and right portions of the inner cylinder main body 15, and these unlocking notches 13 are the central portions of the above-mentioned upper and lower or left and right body portions 15a and 15a. The tip portions 12a of the pair of locking bars 12 are fitted and guided, respectively. Reference numeral 28 denotes a pair of left and right tumbler spring accommodating portions having spring end support surfaces formed at appropriate locations (in FIG. 3, stepped lower end portions of the left and right body portions 15a and 15a) in the tumbler accommodating portion 27, and these tumblers. A pair of spring accommodating portions 28 are provided vertically or horizontally facing the inside of the left and right stepped body portions 15a and 15a.
Next, the partition portion 16 will be described with reference to FIG. 5 in the same manner. Regarding the configuration of the partition portion 16, depending on the design, a wall may be provided inside the inner cylinder main body 15 to provide a partition, or a partition plate 16 may be provided inside the inner cylinder main body 15, which corresponds to a partition here. The wall and the partition plate will be included in the concept of the "partition 16". Further, the shape of the partition portion 16 may be formed in a circular or elliptical shape to form a partition plate unlocking notch that matches the unlocking notch 13 of the inner cylinder main body 15, but in the embodiment, in appearance, FIG. It is formed in a track shape as shown by. Further, a plurality of partition plates 16 may be integrally formed with the inner cylinder body 15 itself. In the present embodiment, the inner cylinder main body 15 and the partition plate 16 are separate members, and the two arc-shaped divided pieces are integrated, as in the patented invention of Japanese Patent No. 4008320 proposed by the applicant (FIGS. 3 and 4). After forming the inner cylinder main body 15 in combination with each other, a large number of partition plates 16 are integrally incorporated into the inner cylinder main body 15 to form a tumbler accommodating portion 27.

ところで、両端部又は挿入部端が弧状の嵌合突片を有するトラック形状の仕切板１６は、矩形状の連結孔１８及び中央部に形成された横長矩形状の案内開口２９を有する。 By the way, the track-shaped partition plate 16 having fitting protrusions having arc-shaped fitting projections at both ends or insertion portions has a rectangular connecting hole 18 and a horizontally long rectangular guide opening 29 formed in the central portion.

次に図２と図５を参照にして錠後端部７側の構成を説明する。前述したように、錠後端部７はテールピース８を有するが、該テールピース８は、外筒体２の後端部に設けられたワッシヤーリング３１ａ、ストッパーリング３１ｂ等の止め具３１を介して外筒体２の後端部内に回動自在に嵌合するテールプラグ３２の中心部に取付けられている。 Next, the configuration on the rear end 7 side of the lock will be described with reference to FIGS. 2 and 5. As described above, the rear end portion 7 of the lock has the tail piece 8, and the tail piece 8 has a stopper 31 such as a washer ring 31a and a stopper ring 31b provided at the rear end portion of the outer cylinder body 2. It is attached to the central portion of the tail plug 32 that is rotatably fitted in the rear end portion of the outer cylinder body 2 via the inner cylinder body 2.

錠後端部７を構成するテールプラグ３２は、錠先端部４と同様に連結棒１９の後端部を支持する後支持孔３３を一対有している。連結棒１９は、内筒本体１５に組み込まれた後述の可動障害子Ｚ及び仕切板１６を貫通した状態で、その先端部は前支持孔２５に、一方、後端部は後支持孔３３に支持されている。 The tail plug 32 constituting the lock rear end portion 7 has a pair of rear support holes 33 for supporting the rear end portion of the connecting rod 19 as in the lock tip portion 4. The connecting rod 19 penetrates the movable obstacle Z and the partition plate 16 which will be described later and are incorporated in the inner cylinder main body 15, and the tip portion thereof is in the front support hole 25, while the rear end portion is in the rear support hole 33. It is supported.

さて、本発明の特徴事項について説明する。例えば二分割の可動障害子Ｚの両方を、図６で示すように「横にした状態」で説明する。なお、図面上方の他方の可動障害子Ｚの構成は、図面下方の一方のそれと同一なので、同一の符号を付して重複する説明を割愛する。図６は可動障害子Ｚの横にした状態の正面図（又は背面図）である。 Now, the features of the present invention will be described. For example, both of the two-divided movable obstacle Z will be described in a “laid-down state” as shown in FIG. Since the configuration of the other movable obstacle Z in the upper part of the drawing is the same as that of the other movable obstacle Z in the lower part of the drawing, the same reference numerals are given and duplicate description is omitted. FIG. 6 is a front view (or a rear view) of the movable obstacle Z in a horizontal state.

この図６を基準にすると、右側の大きな弧状に形成された右端部（ここでは「一端部４１ａ」とする）は、外筒体２の内周面２ａの曲率に対応して形成されているので、タンブラーバネ４２に付勢されている状態（施錠状態）では、例えば外筒体２の内周面２ａに圧接する。左側の小さな弧状端面を有する突起状の左端部（ここでは「突起状他端部４１ｂ」とする）は、タンブラーバネ収容部２７と下方の板状案内部１０の間の収納部３０内に位置する。この突起状他端部４１ｂの内端部側４１ｃに傾斜状の他方の被誘導部分ｂが形成されている。この図６では現れないが、前記他方の被誘導部分ｂの裏側（背面）に、傾斜状の一方の被誘導部分ａが形成されている。そして、前記内端部側４１ｃに対する外端部４１ｄに単数又は複数のロッキングバー１２の係合部としての係合板部分１２ｂ用の受け入れ凹所４８が形成されている。また左端部の横倒れ状凹所は、タンブラーバネ４２用の端部を支持するバネ支持端部４９である。さらに、４６は連結棒１９用貫通孔で、この連結棒１９用貫通孔４６は、可動障害子Ｚがタンブラーバネ４２のバネ力に抗して図面上左側にスライドすることから、長孔矩形状に形成されている。 Based on FIG. 6, the right end portion (here, “one end portion 41a”) formed in a large arc shape on the right side is formed corresponding to the curvature of the inner peripheral surface 2a of the outer cylinder body 2. Therefore, in the state of being urged by the tumbler spring 42 (locked state), for example, it is pressed against the inner peripheral surface 2a of the outer cylinder body 2. The protruding left end having a small arc-shaped end face on the left side (here, referred to as "protruding other end 41b") is located in the storage portion 30 between the tumbler spring accommodating portion 27 and the lower plate-shaped guide portion 10. do. The other inclined guided portion b is formed on the inner end side 41c of the protruding other end portion 41b. Although it does not appear in FIG. 6, one inclined guided portion a is formed on the back side (back surface) of the other guided portion b. Then, a receiving recess 48 for the engaging plate portion 12b as an engaging portion of the single or a plurality of locking bars 12 is formed in the outer end portion 41d with respect to the inner end portion side 41c. The laterally tilted recess at the left end is a spring support end 49 that supports the end for the tumbler spring 42. Further, reference numeral 46 denotes a through hole for the connecting rod 19, and the through hole 46 for the connecting rod 19 has an elongated rectangular shape because the movable obstacle Z slides to the left side on the drawing against the spring force of the tumbler spring 42. Is formed in.

以上のように、図６を参照にすると、二分割の長板状の可動障害子Ｚは、例えば正面視、その幅広側壁は、それぞれ外観上ほぼ小舟形状であり、船首に相当する一端部４１ａは、外筒体２の内周面２ａの曲率に合うように弧状に形成され、前記一端部と反対側の船尾に相当する突起状他端部４１ｂにはタンブラーバネ４２の一端部を支持する凹所状のバネ端支持部４９が設けられ、該突起状他端部の内端部側４１ｃに前記タンブラーバネ４２の伸縮方向に沿って内筒体３に設けた板状案内部１０に案内される指状突起部５０が設けられ、該指状突起部５０の内側縁に断面山形状の被誘導部分ａ、ｂが形成され、前記内端部と反対側に相当する外端部４１ｄに解錠用受け入れ凹所４８が形成されている。付言すると、可動障害子Ｚは、対向状態に二分割Ｚ、Ｚされ、その内端部側の各対向面の一部に傾斜状に形成された被誘導部分ａ、ｂを有する。
ところで、図３は合鍵の挿入方向Ａに直交する面(正面視)で切断した概略縦断面図（二分割した可動障害子が見える初期位置の状態）であるが、例えばこの図３を参照にすると、合鍵を挿入する前の初期状態に於いて、これらの被誘導部分ａ、ｂの対向稜線部は、前記内筒体３の中心軸線Ｏを通る垂直線Ｖに対して傾斜状に形成され、望ましくは前記対向稜線部にそれぞれ直交する前記タンブラー用誘導刻み用の被誘導部分ａ、ｂは、合鍵Ｙの挿入時及び引き抜き時に該合鍵Ｙの窪み状の第１刻みと第２刻みがそれぞれ摩擦することから、断面山形形状又は断面弧状面のいずれかである。
付言すると、断面山形形状に形成された前記被誘導部分ａ、ｂの対向稜線部が、前記内筒体３の中心軸線Ｏを通る垂直線Ｖに対して傾斜状に形成されている。また前記前記被誘導部分ａ、ｂは断面山形形状のみならず、例えば断面弧状面であっても良い。 As described above, referring to FIG. 6, the two-divided long plate-shaped movable obstacle Z is, for example, viewed from the front, and its wide side wall is substantially in the shape of a small boat in appearance, and one end portion 41a corresponding to the bow is formed. Is formed in an arc shape so as to match the curvature of the inner peripheral surface 2a of the outer cylinder 2, and one end of the tumbler spring 42 is supported on the protruding other end 41b corresponding to the stern on the opposite side of the one end. A recessed spring end support portion 49 is provided, and guides are provided to a plate-shaped guide portion 10 provided on the inner cylinder 3 along the expansion and contraction direction of the tumbler spring 42 on the inner end portion side 41c of the protruding end portion. The finger-shaped protrusion 50 is provided, and the guided portions a and b having a mountain-shaped cross section are formed on the inner edge of the finger-shaped protrusion 50, and the outer end portion 41d corresponding to the opposite side to the inner end portion is formed. A receiving recess 48 for unlocking is formed. In addition, the movable obstacle Z is divided into two parts Z and Z in a facing state, and has guided portions a and b formed in an inclined shape on a part of each facing surface on the inner end side thereof.
By the way, FIG. 3 is a schematic vertical cross-sectional view (state of the initial position where the movable obstacle divided into two can be seen) cut along a plane (front view) orthogonal to the insertion direction A of the master key. For example, refer to FIG. Then, in the initial state before inserting the master key, the opposed ridges of the guided portions a and b are formed so as to be inclined with respect to the vertical line V passing through the central axis O of the inner cylinder 3. Desirably, the guided portions a and b for the guide knurls for the tumbler, which are orthogonal to the opposite ridges, have the recessed first and second steps of the master key Y when the master key Y is inserted and pulled out, respectively. Since it rubs, it has either a chevron shape or an arcuate surface.
In addition, the opposed ridges of the guided portions a and b formed in a chevron-shaped cross section are formed in an inclined shape with respect to the vertical line V passing through the central axis O of the inner cylinder 3. Further, the guided portions a and b may have not only a chevron-shaped cross section but also an arc-shaped cross section, for example.

次に、図７乃至図９を参照にして、本発明の合鍵Ｙの一例を説明する。これらの図に於いて、Ｙは合鍵、Ｂはブレード（差し込み部分）、７１は平面部、７１ａは平面部の一側上面、７１ｂは平面部の一側下面、７２は側面部、７２ａは一方の側面、７２ｂは他方の側面である。 Next, an example of the master key Y of the present invention will be described with reference to FIGS. 7 to 9. In these figures, Y is the master key, B is the blade (insertion portion), 71 is the flat surface portion, 71a is the upper surface on one side of the flat surface portion, 71b is the lower surface on one side of the flat surface portion, 72 is the side surface portion, and 72a is one side. 72b is the other side.

本発明の合鍵Ｙを構成要件とするディスクタンブラー錠用の鍵は、内周面に母線に沿ってロックカム溝１１を有する外筒体２と、この外筒体に回動自在に嵌合すると共に、中心軸線Ｏに沿って形成されたキー孔６及び半径方向の解錠切欠１３を有する内筒体３と、この内筒体の母線に沿って延在し、前記ロックカム溝１１と係合する方向に付勢されたロッキングバー１２と、前記内筒体３の各仕切り部１６の間にそれぞれ位置すると共に、タンブラーバネ４２のバネ力に抗して半径方向にスライド自在であり、かつ合鍵ＹのブレードＢに形成された好ましくは大小のタンブラー用誘導刻み７３に対応して係合する被誘導部分を有する複数枚の可動障害子Ｚを備えたディスクタンブラー錠用の鍵であって、前記可動障害子Ｚは、対向状態に二分割され、また前記被誘導部分は断面山形形状又は断面弧状面のいずれかであり、合鍵を挿入する前の初期状態に於いて、その内端部側の各対向面の一部の前記被誘導部分（ａ、ｂ）の対向稜線部が、前記内筒体（３）の中心軸線（Ｏ）を通る垂直線（Ｖ）に対して傾斜状に形成され、一方、前記合鍵のＹの前記タンブラー用誘導刻み７３は、前記ブレードＢの平面部７１の一側上面７１ａに側面部７２からブレード幅方向（鍵幅方向）に形成された窪み状の第１刻み７３ａと、好ましくはこの第１刻み７３ａのほぼ裏側位置に相当する前記平面部７１の一側下面７１ｂに形成された窪み状の第２刻み７３ｂであり、前記合鍵ＹのブレードＢを前記キー孔６に挿入すると、前記二分割の可動障害子Ｚは、それぞれ前記タンブラーバネ４２のバネ力に抗して、かつ一対の連結棒１９にそれぞれ同じ方向に案内されると共に、該可動障害子Ｚの被誘導部分ａ、ｂが前記合鍵のタンブラー用誘導刻み７３に係合し、これにより二分割された可動障害子Ｚの外端部側の各解錠用受け入れ凹所４８が、前記ロッキングバー１２の内端部（好ましくはその係合板部分）１２ｂと一致し、以て、合鍵Ｙと共に内筒体３を解錠方向へ回動させた時、前記ロックカム溝１１と前記ロッキングバー１２との間に生じる楔作用により、内筒体３が外筒体２に対して相対回動する（図１２参照）。 The key for a disc tumbler lock having the master key Y of the present invention as a constituent requirement is rotatably fitted to an outer cylinder 2 having a lock cam groove 11 on the inner peripheral surface along a bus and the outer cylinder. , An inner cylinder 3 having a key hole 6 formed along the central axis O and an unlocking notch 13 in the radial direction, and an inner cylinder 3 extending along the bus of the inner cylinder and engaging with the lock cam groove 11. It is located between the locking bar 12 urged in the direction and each partition 16 of the inner cylinder 3, and is slidable in the radial direction against the spring force of the tumbler spring 42, and the key Y A key for a disc tumbler lock having a plurality of movable obstacles Z having a guided portion that engages with a preferably large and small tumbler inductive notch 73 formed on the blade B of the above. The obstacle Z is divided into two in a facing state, and the guided portion has either a mountain-shaped cross section or an arc-shaped cross section, and in the initial state before inserting the master key , each of the inner end portions thereof. The facing ridges of a part of the facing surfaces (a, b) are formed so as to be inclined with respect to the vertical line (V) passing through the central axis (O) of the inner cylinder (3). On the other hand, the tumbler induction notch 73 of Y of the master key is a recess-shaped first notch formed in the blade width direction (key width direction) from the side surface portion 72 on one side upper surface 71a of the flat surface portion 71 of the blade B. 73a, preferably a recessed second notch 73b formed on one side lower surface 71b of the flat surface portion 71 corresponding to substantially the back side position of the first notch 73a, and the blade B of the master key Y is formed in the key hole. When inserted into 6, the two-divided movable obstacle Z is guided in the same direction by the pair of connecting rods 19 against the spring force of the tumbler spring 42, and the movable obstacle Z of the movable obstacle Z. Each of the unlocking receiving recesses 48 on the outer end side of the movable obstacle Z divided into two by engaging the guided portions a and b with the tumbler induction notch 73 of the master key is the locking bar 12. When the inner cylinder 3 is rotated in the unlocking direction together with the master key Y, it is between the lock cam groove 11 and the locking bar 12. Due to the wedge action generated in, the inner cylinder 3 rotates relative to the outer cylinder 2 (see FIG. 12).

図９は、図７の９−９線の箇所のタンブラー用誘導刻み７３の断面形状、及び表側の斜辺の長さと裏側の斜辺の長さが相違する旨（特徴部分）を示す説明図である。実施形態のタンブラー用誘導刻み７３は、例えば図７で示すように、ブレード（差し込み部分）Ｂの側面部７２である両側面７２ａ、７２ｂにそれぞれブレードの差し込み方向に深さが異なる大小の誘導刻み７３がそれぞれ形成されているが、図７の状態で合鍵Ｙをひっくり返した場合、前記側面部７２である両側面７２ａ、７２ｂにもそれぞれブレードＢの差し込み方向に深さが異なる大小の誘導刻み７３がそれぞれ形成されている。 FIG. 9 is an explanatory view showing the cross-sectional shape of the tumbler guide notch 73 at the portion 9-9 in FIG. 7 and the difference between the length of the hypotenuse on the front side and the length of the hypotenuse on the back side (feature portion). .. As shown in FIG. 7, for example, as shown in FIG. 7, the tumbler guide knurls 73 of the embodiment have large and small guide knurls having different depths in the blade insertion directions on both side surfaces 72a and 72b, which are side surface portions 72 of the blade (insertion portion) B. 73 are formed respectively, but when the master key Y is turned upside down in the state of FIG. 7, large and small induction notches having different depths in the insertion direction of the blade B are also formed on both side surfaces 72a and 72b, which are the side surface portions 72. 73 are formed respectively.

したがって、図９で示すようにタンブラー用誘導刻み７３の断面形状はほぼ山形状であり、上下の山形状誘導刻み７３の各稜線部（刃先に見える部分）Ｐ、Ｐは、内筒体２の中心軸線Ｏを通る垂直線Ｖから回転対称の状態で外れている。したがって、タンブラー用誘導刻み７３の第２刻み７３ｂの斜辺の長さＬ２は、第１刻み７３ａの斜辺の長さＬ１よりも短い。 Therefore, as shown in FIG. 9, the cross-sectional shape of the tumbler guide notch 73 is substantially mountain-shaped, and the respective ridges (portions visible to the cutting edge) P and P of the upper and lower mountain-shaped guide notches 73 are the inner cylinder 2. It deviates from the vertical line V passing through the central axis O in a rotationally symmetric state. Therefore, the length L2 of the hypotenuse of the second step 73b of the induction step 73 for the tumbler is shorter than the length L1 of the hypotenuse of the first step 73a.

さらに付言すると、タンブラー用誘導刻み７３は、一方の側面部の縁部に形成された一群のものと、他方の側面部の縁部に形成された一群のものとがあり、かつ、前記一群の隣同士のタンブラー用誘導刻みの断面形状の頂点Ｐの位置が異なるものが含まれ、しかも、鍵Ｙは１８０度回転させて使用することができるリバーシブルであることを特徴とする。ところで、実施形態では、図７及び図１０で示すように、前記深さが異なる大小の誘導刻み７３は、可動障害子Ｚの配列位置に対応してブレードＢの挿入方向に表と裏にそれぞれ合計６個形成されているが、もちろん、大小のタンブラー用誘導刻み７３の数は可動障害子Ｚのそれに対応するのが望ましい。なお、合鍵のＹのブレードＢの平面視上の中央部部分に回転対称にブレードの挿入方向に沿って直線状に長溝７４が形成されている。したがって、実施形態の合鍵Ｙは、リバーシブルである。 Further, the tumbler induction notch 73 includes a group formed on the edge of one side surface portion and a group formed on the edge portion of the other side surface portion, and the group thereof. It is characterized in that the positions of the vertices P of the cross-sectional shapes of the adjacent tumbler guide knurls are different from each other, and the key Y is reversible and can be used by rotating it by 180 degrees. By the way, in the embodiment, as shown in FIGS. 7 and 10, the large and small guide notches 73 having different depths correspond to the arrangement position of the movable obstacle Z on the front and back in the insertion direction of the blade B, respectively. A total of 6 pieces are formed, but of course, it is desirable that the number of large and small tumbler guide notches 73 corresponds to that of the movable obstacle Z. A long groove 74 is formed in a linear portion along the blade insertion direction in a rotationally symmetrical manner in the central portion of the Y blade B of the master key in a plan view. Therefore, the master key Y of the embodiment is reversible.

第１実施形態では、合鍵のタンブラー用誘導刻みの第２刻みの斜辺の長さは、第１刻みの斜辺の長さよりも短い（異なる刻みである）。しかしながら、後述するように合鍵のタンブラー用誘導刻みの第２刻みの斜辺の長さは、第１刻みの斜辺の長さと略同じ（同等の刻みである）であっても良い。 In the first embodiment, the length of the hypotenuse of the second step of the tumbler guide step of the master key is shorter than the length of the hypotenuse of the first step (different steps). However, as will be described later, the length of the hypotenuse of the second step of the induction step for the tumbler of the master key may be substantially the same as the length of the hypotenuse of the first step (same step).

この欄では、タンブラー錠Ｘを構成する可動障害子Ｚの他の実施形態について、簡単に説明する。まず図１３は第２実施形態（可動障害子の組み合わせの例）の説明図、図１４は第３実施形態（可動障害子の組み合わせの例）の説明図である。第２実施形態の可動障害子Ｚ及び第３実施形態の可動障害子Ｚは、二分割の可動障害子の少なくとも一方には、複数の解錠用受け入れ凹所４８が形成されている旨を示す。前述したように、二分割の可動障害子は、二列の状態で、内筒体３の中心軸線Ｏ方向に整列しているが、単数の解錠用受け入れ凹所４８を有する可動障害子Ｚのみを適宜に組み合わせて配列しても良いし、また単数の解錠用受け入れ凹所４８を有する可動障害子Ｚと複数の解錠用受け入れ凹所４８を有する可動障害子Ｚとを適宜に組み合わせて配列しても良い。このように構成すると、ピッキング対策の観点から安全性の高いタンブラー錠Ｘを得ることができる。 In this column, other embodiments of the movable obstacle Z constituting the tumbler lock X will be briefly described. First, FIG. 13 is an explanatory diagram of a second embodiment (an example of a combination of movable obstacles), and FIG. 14 is an explanatory diagram of a third embodiment (an example of a combination of movable obstacles). The movable obstacle Z of the second embodiment and the movable obstacle Z of the third embodiment indicate that a plurality of unlocking receiving recesses 48 are formed in at least one of the two divided movable obstacles. .. As described above, the two-divided movable obstacles are aligned in the central axis O direction of the inner cylinder 3 in a two-row state, but the movable obstacle Z having a single unlocking receiving recess 48. Only may be appropriately combined and arranged, or a movable obstacle Z having a single unlocking receiving recess 48 and a movable obstacle Z having a plurality of unlocking receiving recesses 48 may be appropriately combined. May be arranged. With this configuration, a highly safe tumbler lock X can be obtained from the viewpoint of picking countermeasures.

次に図１５は第４実施形態の合鍵Ｙ１である。この合鍵Ｙ１のタンブラー用誘導刻み７３の断面形状と図９に示した合鍵Ｙのそれとを比較すると明らかなように、表側の斜辺の長さＬ１と裏側の斜辺の長さＬ２がほぼ同じである。 Next, FIG. 15 is the master key Y1 of the fourth embodiment. As is clear from comparing the cross-sectional shape of the tumbler guide notch 73 of the master key Y1 with that of the master key Y shown in FIG. 9, the length L1 of the hypotenuse on the front side and the length L2 of the hypotenuse on the back side are almost the same. ..

このように構成しても、対向状態に二分割された各可動障害子は、その内端部側の各対向面の傾斜状の誘導部分が、合鍵Ｙ１のタンブラー用誘導刻みに同方向に係合するので、このように同時に係合する位置に対応する前記タンブラー用誘導刻みを正確に形成しなければならないので、複製が困難な鍵を得ることができる。 Even with this configuration, in each movable obstacle divided into two in a facing state, the inclined guidance portion of each facing surface on the inner end side is engaged in the same direction as the tumbler guidance step of the master key Y1. As a result, it is necessary to accurately form the tumbler guide knurls corresponding to the positions of simultaneous engagement in this way, so that a key that is difficult to duplicate can be obtained.

なお、第１実施形態の二分割の可動障害子と第２実施形態の二分割の可動障害子を組み合わせても良い。すなわち、合鍵のタンブラー用誘導刻みは、第２刻みの斜辺の長さが第１刻みの斜辺の長さよりも短いもの（異なる刻み）と、第２刻みの斜辺の長さが第１刻みの斜辺の長さと略同じもの（同等の刻み）の二種類が、内筒の中心軸線に沿って組み込まれても良い。このように構成すると、他の実施形態によりも、「より一層のピッキングの防止」、「より一層の鍵違いの増大化を図る」及び「より一層の複製が困難な合鍵を得る」という、優れた効果を得ることができる。 The two-divided movable obstacle of the first embodiment and the two-divided movable obstacle of the second embodiment may be combined. That is, the tumbler-guided step of the master key is one in which the length of the hypotenuse of the second step is shorter than the length of the hypotenuse of the first step (different step) and the length of the hypotenuse of the second step is the length of the first step. Two types, which are approximately the same length as the one (in equivalent increments), may be incorporated along the central axis of the inner cylinder. With this configuration, the other embodiments are also excellent in that "further prevention of picking", "further increase in key difference", and "obtaining a master key that is more difficult to duplicate". The effect can be obtained.

本発明は、錠前や建具の分野で利用することができる。 The present invention can be used in the fields of locks and fittings.

Ｘ…タンブラー錠、
Ｚ…二分割の可動障害子、
ａ、ｂ…被誘導部、
Ｙ、Ｙ１…合鍵、
Ｂ…ブレード、
７１…平面部、
７２…側面部、
７３…タンブラー用誘導刻み、
７３ａ…第１刻み、
Ｌ１…第１刻みの斜辺の長さ、
７３ｂ…第２刻み、
Ｌ２…第２刻みの斜辺の長さ、
７４…直線状長溝、
１…扉、
２…外筒体、
３…内筒体、
１１…ロックカム溝、
１２…ロッキングバー、
１２ａ…尖端部、１２ｂ…係合板部分、
１３…解錠切欠、１４…付勢バネ、
１５…内筒本体、
１６…仕切板
１８…連結孔、
１９…連結棒
２７…タンブラー収容部、
２８…タンブラーバネ収容部、
４２…タンブラーバネ。 X ... tumbler lock,
Z ... Two-part movable obstacle,
a, b ... Induced part,
Y, Y1 ... Master key,
B ... blade,
71 ... Flat surface,
72 ... Side part,
73 ... Induction knurling for tumblers,
73a ... 1st step,
L1 ... The length of the hypotenuse in the first step,
73b ... 2nd step,
L2 ... The length of the hypotenuse in the second step,
74 ... Straight long groove,
1 ... Door,
2 ... Outer cylinder,
3 ... Inner cylinder,
11 ... Lock cam groove,
12 ... Rocking bar,
12a ... tip, 12b ... engaging plate,
13 ... unlocking notch, 14 ... urging spring,
15 ... Inner cylinder body,
16 ... Partition plate 18 ... Connecting hole,
19 ... Connecting rod 27 ... Tumbler housing,
28 ... Tumbler spring housing,
42 ... Tumbler spring.

Claims

An outer cylinder having a lock cam groove along the inner peripheral surface bus, and a key hole formed along the central axis and an unlocking notch in the radial direction while being rotatably fitted to the outer cylinder. Positioned between the inner cylinder and the locking bar extending along the bus of the outer peripheral surface of the inner cylinder and urged in the direction of engaging with the lock cam groove, and each partition of the inner cylinder. Along with, a plurality of movable pieces that are slidable in the radial direction against the spring force of the tumbler spring and have a guided portion that engages corresponding to the large and small tumbler inductive notches formed on the blade of the master key. In a disc tumbler lock for fittings equipped with a handicapped child,
The movable obstacle is divided into two in a facing state, and the guided portion has either a chevron shape or an arcuate cross section, and in the initial state before inserting the master key, the inner end side thereof. The facing ridges of a part of the facing surfaces (a, b) are formed so as to be inclined with respect to the vertical line (V) passing through the central axis (O) of the inner cylinder (3). ,
On the other hand, the tumbler inductive notch of the master key includes a recessed first notch (73a) formed on one upper surface of the flat surface portion of the blade from the side surface portion in the width direction of the blade, and substantially the first notch. It is a recessed second notch (73b) formed on one side lower surface of the flat surface portion of the blade corresponding to the back side position.
When the blade of the master key is inserted into the key hole, the two-divided movable obstacles are respectively guided by the pair of guide rods in the same direction against the spring force of the tumbler spring and are movable. The guided portion of the obstacle engages with the tumbler induction notch of the master key, and each unlocking receiving recess on the outer end side of the movable obstacle divided into two is the inner end portion of the locking bar. Therefore, when the inner cylinder is rotated in the unlocking direction together with the master key, the inner cylinder is relative to the outer cylinder due to the wedge action generated between the lock cam groove and the locking bar. A rotating disc tumbler lock for fittings.

An outer cylinder having a lock cam groove along the inner peripheral surface bus, and a key hole formed along the central axis and an unlocking notch in the radial direction are provided while being rotatably fitted to the outer cylinder. Positioned between the inner cylinder and the locking bar extending along the bus of the outer peripheral surface of the inner cylinder and urged in the direction of engaging with the lock cam groove, and each partition of the inner cylinder. Along with, a plurality of movable pieces that are slidable in the radial direction against the spring force of the tumbler spring and have a guided portion that engages corresponding to the large and small tumbler inductive notches formed on the blade of the master key. In the key for disc tumbler locks for fittings with obstacles
The movable obstacle is divided into two in a facing state, and the guided portion has either a mountain-shaped cross section or an arc-shaped cross-section, and in the initial state before inserting the master key, the inner end side thereof. The facing ridges of a part of the facing surfaces (a, b) are formed so as to be inclined with respect to the vertical line (V) passing through the central axis (O) of the inner cylinder (3). whereas, the tumbler for induction increments of the master key is said blade first increment from the side surface on one side upper surface of the flat portion recess shape formed in the width direction of the blades (73a), the first increment It is a recessed second notch (73b) formed on one side lower surface of the flat surface portion substantially corresponding to the back side position, and when the blade of the master key is inserted into the key hole, the two-divided movable obstacle is released. Each is guided in the same direction by a pair of guide rods against the spring force of the tumbler spring, and the guided portion of the movable obstacle engages with the tumbler guide notch of the master key, thereby. Each unlocking receiving recess on the outer end side of the movable obstacle divided into two coincides with the inner end of the locking bar, so that the inner cylinder is rotated in the unlocking direction together with the master key. A key for a disc tumbler lock for fittings in which the inner cylinder rotates relative to the outer cylinder due to the wedge action generated between the lock cam groove and the locking bar.