JP2006022598A

JP2006022598A - Lock for door

Info

Publication number: JP2006022598A
Application number: JP2004203256A
Authority: JP
Inventors: Masaaki Konose; 木野瀬将明
Original assignee: Miwa Lock KK; Miwa Lock Co Ltd
Current assignee: Miwa Lock KK; Miwa Lock Co Ltd
Priority date: 2004-07-09
Filing date: 2004-07-09
Publication date: 2006-01-26
Anticipated expiration: 2024-07-09
Also published as: JP4434863B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock for a door, which prevents a cylinder lock from being attacked by a tool such as a cutting means, particularly, prevents the cylinder lock from being pulled out. <P>SOLUTION: This lock for the door comprises a cylindrical housing which is fixed to the door, and the cylinder lock which is fixedly and internally mounted in the housing; a plurality of continuous fitting parts are formed in the housing; one of the fitting parts comprises a first fitting part which is formed at the back end of the housing in a stepwise shape and into which a plate for preventing the extraction of the cylinder lock is to be fitted, and a second fitting part which communicates with the first fitting part and into which an outer cylinder of the cylinder lock is to be fitted; and the plate for preventing the extraction is fixed to the cylinder lock via a fixing means, and locked to a stepwise vertical inner peripheral surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、扉用錠前に関し、特にシリンダー錠に対する切削手段、引き抜き手段等の工具による攻撃から守る扉用錠前に関する。 The present invention relates to a door lock, and more particularly, to a door lock that protects a cylinder lock from being attacked by tools such as cutting means and pulling means.

特許文献１には、鍵孔手前側から強引にドリル等を挿入し、各構成要素を削りばらばらに分解し、鍵として無力化してしまう悪質な不正解錠に対して十分対抗可能なシリンダー錠が提案され、「外筒と、該外筒の嵌合孔に回動可能に挿着された内筒と、外筒及び内筒に組み込まれた複数組の障害子と、前記内筒に一体的に設けられた連結手段（駆動軸）とを備えたシリンダー錠の構成」が開示されている。 Patent Document 1 discloses a cylinder lock that can sufficiently counter a malicious unauthorized unlocking that forcibly inserts a drill or the like from the front side of the keyhole, disassembles each component into pieces, and disables it as a key. Proposed, "an outer cylinder, an inner cylinder rotatably mounted in a fitting hole of the outer cylinder, a plurality of obstacles incorporated in the outer cylinder and the inner cylinder, and an integral with the inner cylinder The structure of the cylinder lock provided with the connecting means (drive shaft) provided in the above is disclosed.

前記シリンダー錠は、「内筒にピン孔と重ならない位置で鍵孔に向けて超硬合金製前後長手のガイドバーが僅かに突出されていることを特徴とする」ものであるが、泥棒が用いるドリル、引き抜き工具により、シリンダー錠そのものが、扉から引き抜かれるという問題点がある。
特開公開２００４−６０４２４号公報 The cylinder lock is characterized in that the front and rear longitudinal guide bars made of cemented carbide are slightly projected toward the key hole at a position that does not overlap the pin hole in the inner cylinder. There is a problem that the cylinder lock itself can be pulled out from the door depending on the drill and pulling tool used.
JP-A-2004-60424

本発明の主たる目的は、悪質な不正解錠に対しても十分対抗可能な錠前を提案すること。また本発明の目的は、シリンダー錠の先端部が露呈しても、引き抜き工具により、シリンダー錠そのものを、扉に固定されたハウジングから容易に引き抜かれないようにすること。また本発明の目的は、部品点数を少なく、簡単にシリンダー錠に固定することができることである。 The main purpose of the present invention is to propose a lock that can sufficiently counter even malicious unauthorized unlocking. It is another object of the present invention to prevent the cylinder lock itself from being easily pulled out of the housing fixed to the door by the pulling tool even if the tip of the cylinder lock is exposed. Another object of the present invention is to reduce the number of parts and easily fix the cylinder lock.

本発明の扉用錠前は、扉に固定されるシリンダーの筒状ハウジングと、このハウジングに固定的に内装されるシリンダー錠とから成る扉用錠前に於いて、前記ハウジングに連続する複数個の嵌合部を形成し、該嵌合部の一つは、ハウジングの後端部の端部に段差状に形成され、かつ、シリンダー錠用引き抜き防止板が嵌合する第１嵌合部分と、該第１嵌合部分に連通しかつシリンダー錠の外筒が嵌着する第２嵌合部分とを有し、前記引き抜き防止板は、シリンダー錠に固定手段を介して固定され、かつ、前記段差状の垂直内周面に係止されることを特徴とする。 The door lock of the present invention is a door lock comprising a cylindrical housing of a cylinder fixed to the door and a cylinder lock fixedly mounted in the housing, and a plurality of fittings continuous to the housing. One of the fitting portions is formed in a stepped shape at the end of the rear end portion of the housing, and the first fitting portion into which the pull-out prevention plate for cylinder lock is fitted, A second fitting portion that communicates with the first fitting portion and into which an outer cylinder of the cylinder lock is fitted, and the pull-out prevention plate is fixed to the cylinder lock via a fixing means, and the stepped shape It is characterized in that it is locked to the vertical inner peripheral surface.

上記構成に於いて、第１嵌合部分１９は、環状の後ろ向き大径凹所であり、一方、引き抜き防止板は、段差状の垂直内周面に係止される環状の係止板２０であることを特徴とする。また、ハウジングの先端部には、環状支持壁１６を有する環状の横向き凹所１５が形成され、該横向き凹所１５に、シリンダー錠用保護部材７が密着状態に嵌合していることを特徴とする。 In the above configuration, the first fitting portion 19 is an annular rearward-facing large-diameter recess, while the pull-out prevention plate is an annular locking plate 20 that is locked to a stepped vertical inner peripheral surface. It is characterized by being. An annular lateral recess 15 having an annular support wall 16 is formed at the front end of the housing, and the cylinder lock protection member 7 is fitted in the lateral recess 15 in a close contact state. And

ここで、「ハウジング」とは、シリンダー錠を直接又は間接的に包む部材をいう。 Here, the “housing” refers to a member that directly or indirectly wraps the cylinder lock.

（１）図１１は、本発明の特徴を示す概略説明図（設計図の寸法に従ったものではない。）である。この図１１を参照にして、本発明の効果である引き抜き防止機能を説明する。 (1) FIG. 11 is a schematic explanatory view (not according to the dimensions of the design drawing) showing the features of the present invention. With reference to FIG. 11, the pull-out preventing function which is an effect of the present invention will be described.

今、泥棒が不正解錠をするために、図示しないドリルでシリンダー錠２を攻撃したとする。そして、仮に化粧リング８の前面を切削し、保護部材７を工具３５で引き抜き、しかも、ハウジング４の環状支持壁１６までも削り取ったとする。今までの扉用錠前では、この段階で、工具３５で内筒２５の先端部２５ａを挟持し、引き抜こうとすれば、容易にシリンダー錠２を引き抜くことが可能である。 Now, suppose that the thief attacks the cylinder lock 2 with a drill (not shown) in order to perform unauthorized unlocking. Then, it is assumed that the front surface of the decorative ring 8 is cut, the protective member 7 is pulled out with the tool 35, and the annular support wall 16 of the housing 4 is also scraped off. In the conventional door lock, the cylinder lock 2 can be easily pulled out by holding the tip 25a of the inner cylinder 25 with the tool 35 and pulling it out at this stage.

しかし、本発明の扉用錠前Ｘのシリンダー錠２は、固定手段３１と一体又は別体の係止板２０が駆動軸２６の突出部分２６ａに一体的に設けられており、しかも、該係止板２０の直径寸法Ｌ１は、外筒２３の直径寸法Ｌよりも大きいので、ハウジング４の大嵌合部１８の第１嵌合部分１９に嵌合しているリング状の係止板２０の周縁部２０ａが、前述したように第１嵌合部分１９の環状の垂直内周面１９ａに面接触状態に当たる。したがって、工具３５でシリンダー錠２をハウジング４から容易に引き抜くことができない。 However, in the cylinder lock 2 of the door lock X of the present invention, the locking plate 20, which is integral with or separate from the fixing means 31, is provided integrally with the protruding portion 26 a of the drive shaft 26. Since the diameter dimension L 1 of the plate 20 is larger than the diameter dimension L of the outer cylinder 23, the peripheral edge of the ring-shaped locking plate 20 fitted in the first fitting portion 19 of the large fitting portion 18 of the housing 4. As described above, the portion 20a comes into surface contact with the annular vertical inner peripheral surface 19a of the first fitting portion 19. Therefore, the cylinder lock 2 cannot be easily pulled out from the housing 4 with the tool 35.

（２）請求項２に記載の発明は、シリンダー錠を加工しなくても、簡単に内筒の駆動軸に固定することができると共に、引き抜き防止機能の効果を十分に発揮することができる。 (2) The invention according to claim 2 can be easily fixed to the drive shaft of the inner cylinder without processing the cylinder lock, and can sufficiently exhibit the effect of the pull-out preventing function.

（３）請求項３に記載の発明は、引き抜き防止機能を前提として、不正解錠対策を十分に図ることができる。 (3) The invention described in claim 3 can sufficiently take measures against unauthorized unlocking on the premise of a pull-out prevention function.

以下、図１乃至図１１に示す本発明の扉用錠前Ｘを実施するための最良の形態により説明する。 Hereinafter, the best mode for carrying out the door lock X of the present invention shown in FIGS. 1 to 11 will be described.

（１）全体の環境
図１及び図２を参照にして扉用錠前Ｘの全体の環境を説明する。１は建具の扉で、この扉１には扉用錠前Ｘが取付けられ、該扉１は水平方向に開閉する。図１を基準にすると、１ａは扉の外壁面、１ｂは内壁面である。周知のように外壁面１ａにシリンダー錠２、一方、内壁面１ｂにサムターン３がそれぞれ取り付けられ、これらの駆動力（操作力）は、扉１の自由端部の開口部に内装された錠箱の錠構成部材（例えば、ダルマ、係止レバー、駆動カムなど）に伝達される。 (1) Overall Environment The overall environment of the door lock X will be described with reference to FIGS. 1 and 2. 1 is a door for joinery. A door lock X is attached to the door 1, and the door 1 opens and closes in the horizontal direction. With reference to FIG. 1, 1a is an outer wall surface of the door and 1b is an inner wall surface. As is well known, a cylinder lock 2 is attached to the outer wall surface 1 a, and a thumb turn 3 is attached to the inner wall surface 1 b, and the driving force (operating force) is provided in the opening of the free end of the door 1. Are transmitted to the lock components (eg, dharma, locking lever, drive cam, etc.).

４は扉１の外壁面に固定的に取り付けられたシリンダー錠用ハウジングで、このハウジング４は、例えば外座の機能を有し、サムターン３側の内座５と固着具６を介して一体的に連結される。 Reference numeral 4 denotes a cylinder lock housing fixedly attached to the outer wall surface of the door 1. The housing 4 has a function of, for example, an outer seat, and is integrated with the inner seat 5 on the thumb turn 3 side and the fixing tool 6. Connected to

７はシリンダー錠２の前面をカバーする保護部材で、この保護部材７は、シリンダー錠２の内筒の突出部分の一部に外嵌合する。保護部材７は超硬合金製であり、その前面がややすり鉢状に形成されている。 Reference numeral 7 denotes a protective member that covers the front surface of the cylinder lock 2, and this protective member 7 is externally fitted to a part of the protruding portion of the inner cylinder of the cylinder lock 2. The protective member 7 is made of cemented carbide, and its front surface is formed in a mortar shape.

８はハウジング４を包む化粧リングで、この化粧リングは、例えば前記薄型の筒状の保護部材７をハウジング４の前面に密着するようにシリンダー錠２の内筒の突出部分に外嵌合した後に、第２固着具９を介してハウジング４に一体的に結合する。以下、本発明の特定要件に関係がある構成部材について説明する。 Reference numeral 8 denotes a decorative ring that encloses the housing 4. For example, the decorative ring is formed after the thin cylindrical protective member 7 is externally fitted to the protruding portion of the inner cylinder of the cylinder lock 2 so as to be in close contact with the front surface of the housing 4. , And are integrally coupled to the housing 4 via the second fixing tool 9. Hereinafter, the structural members related to the specific requirements of the present invention will be described.

（２）ハウジング４
図３ないし図５を参照にして筒状のハウジング４を説明する。１１は後端部寄りの部位或いは中央部に周設された鍔部で、この鍔部１１には、第２固着具９用の複数個（例えば６個）の貫通孔１２が所定間隔を有して形成されている。ここでは、鍔部１１を基準にハウジングの先端部１３と後端部１４に区別する。 (2) Housing 4
The cylindrical housing 4 will be described with reference to FIGS. Reference numeral 11 denotes a flange portion provided around the rear end portion or the central portion, and a plurality of (for example, six) through holes 12 for the second fixing tool 9 have a predetermined interval in the flange portion 11. Is formed. Here, the front end portion 13 and the rear end portion 14 of the housing are distinguished on the basis of the flange portion 11.

ハウジング４は、後端部１４の端面から先端部１３の端面まで互いに軸芯方向に連通する複数個の嵌合孔を有し、これらの断面形状や半径は相違する（例えば図４、図５参照）。 The housing 4 has a plurality of fitting holes that communicate with each other in the axial direction from the end surface of the rear end portion 14 to the end surface of the front end portion 13, and their cross-sectional shapes and radii are different (for example, FIGS. 4 and 5). reference).

シリンダー錠２は、後端部１４の端面から嵌合孔に差し込まれる（挿着）が、ここでは、先端部１３側から説明する。 The cylinder lock 2 is inserted into the fitting hole from the end face of the rear end portion 14 (insertion), but here, the description will be given from the front end portion 13 side.

まず１５は、先端部１３の前面に環状に形成された横向き凹所で、この横向き凹所１５に前述した保護部材７が密着状態に嵌合する。１６は中央部にやや小さめの小嵌合孔１７を有する環状支持壁で、この環状支持壁１６の内壁面にシリンダー錠２の外筒の先端面が当たるように内筒の突出部分が小嵌合孔１７に貫通状態に嵌合する。 First, reference numeral 15 denotes a lateral recess formed in an annular shape on the front surface of the distal end portion 13, and the protective member 7 described above is fitted into the lateral recess 15 in a close contact state. Reference numeral 16 denotes an annular support wall having a slightly smaller small fitting hole 17 at the center, and the protruding portion of the inner cylinder is small-fitted so that the inner wall surface of the annular support wall 16 abuts the front end surface of the outer cylinder of the cylinder lock 2. The fitting hole 17 is fitted in a penetrating state.

次に１８は小嵌合部（小嵌合孔）１７に連通するように後端部１４の後面から環状支持壁１６の内壁面まで形成された大きめの大嵌合部で、この大嵌合部１８は、二つの嵌合部分に区別することができる。 Next, 18 is a large large fitting portion formed from the rear surface of the rear end portion 14 to the inner wall surface of the annular support wall 16 so as to communicate with the small fitting portion (small fitting hole) 17. The part 18 can be distinguished into two fitting parts.

すなわち、第１の嵌合部分１９は、図３、図４で示すように後端部１４の端部に段差状に形成された環状の後ろ向き大径凹所で、この第１嵌合部分１９内に図８で示すような環状の係止板２０が嵌合する。この係止板２０の外周縁部が第１嵌合部分１９の環状の垂直内周面１９ａに面接触状態で係合する（図３、図１１参照）。
係止板２０は、後述するようにシリンダー錠２の後端部に一体的に取り付けられ、本発明の目的（シリンダー錠の引き抜き防止）を達成する。 That is, the first fitting portion 19 is an annular rearward large-diameter recess formed in a step shape at the end of the rear end portion 14 as shown in FIGS. An annular locking plate 20 as shown in FIG. 8 is fitted therein. The outer peripheral edge of the locking plate 20 engages with the annular vertical inner peripheral surface 19a of the first fitting portion 19 in a surface contact state (see FIGS. 3 and 11).
The locking plate 20 is integrally attached to the rear end portion of the cylinder lock 2 as will be described later, and achieves the object of the present invention (preventing the cylinder lock from being pulled out).

第２の嵌合部分２１は、第１嵌合部分１９から環状支持壁１６まで形成された断面鍵穴形状（図５で示す形状）で、この第２嵌合部分２１には、シリンダー錠２の外筒２３が嵌着する。この第２嵌合部分２１は、本実施例のシリンダー錠２の外筒２３の外観形状に対応する。 The second fitting portion 21 has a cross-sectional keyhole shape (the shape shown in FIG. 5) formed from the first fitting portion 19 to the annular support wall 16, and the second fitting portion 21 includes the cylinder lock 2. The outer cylinder 23 is fitted. This 2nd fitting part 21 respond | corresponds to the external shape of the outer cylinder 23 of the cylinder lock 2 of a present Example.

したがって、第２嵌合部分２１は、断面円形状の小径孔２１ａと、この小径孔２１ａに軸方向に長手状に連通する断面凹状の嵌合溝２１ｂとから成る。小径孔２１ａには外筒２３の円筒状部分２３ａが嵌合し、一方、嵌合溝２１ｂには外筒の外周壁の一部に長手方向に突出する長板或いはブロック状部分が嵌合する。 Therefore, the second fitting portion 21 is composed of a small-diameter hole 21a having a circular cross section and a fitting groove 21b having a concave cross-section communicating with the small-diameter hole 21a in the longitudinal direction in the axial direction. A cylindrical portion 23a of the outer cylinder 23 is fitted into the small diameter hole 21a, while a long plate or a block-like portion protruding in the longitudinal direction is fitted into a part of the outer peripheral wall of the outer cylinder in the fitting groove 21b. .

（３）シリンダー錠２
図６ないし図１０を参照にしてハウジング４内に固定的に内装されたシリンダー錠２を説明する。シリンダー錠２の基本的な構成部材は、外筒２３と、この外筒２３の中心部に軸芯方向に形成された嵌合孔２４に所定量回動可能に挿着される内筒２５と、この内筒２５に固着手段を介して、又は該内筒を一体的に形成され、かつ、突出後端部に「テールピース」と称される駆動突片２７を有する円柱状の駆動軸２６とから成る。 (3) Cylinder lock 2
The cylinder lock 2 fixedly housed in the housing 4 will be described with reference to FIGS. The basic components of the cylinder lock 2 are an outer cylinder 23, and an inner cylinder 25 that is inserted into a fitting hole 24 formed in the axial direction at the center of the outer cylinder 23 so as to be rotatable by a predetermined amount. A cylindrical drive shaft 26 which is formed on the inner cylinder 25 through a fixing means or integrally formed with the inner cylinder 25 and has a driving protrusion 27 called a “tail piece” at the protruding rear end. It consists of.

特に図示しないが、外筒２３及び内筒２５には、それぞれ障害子（ボトムピン、ドライバーピン、スプリング）を組み込むためのピン孔がそれぞれ半径方向に形成されている。 Although not particularly shown, pin holes for incorporating obstructions (bottom pins, driver pins, springs) are respectively formed in the outer cylinder 23 and the inner cylinder 25 in the radial direction.

障害子は、多数の鍵違いを得るために、外筒２３および内筒２５の軸（長手）方向に所定間隔を有して複数組配設され、普通一般に、合鍵の挿入により、各障害子が半径方向にそれぞれ移動して、いわゆる内筒２５の外周面を基準とするシャーラインに揃うと、内筒２５を合鍵の操作により解錠方向へ回動することができるが知られている。なお、シリンダー錠２の内部構造は、本発明の限定要件ではないので、説明を割愛する。 In order to obtain a large number of key differences, a plurality of obstacles are arranged at predetermined intervals in the axial (longitudinal) direction of the outer cylinder 23 and the inner cylinder 25. Generally, each obstacle is inserted by inserting a key. It is known that the inner cylinder 25 can be rotated in the unlocking direction by the operation of the key combination when each moves in the radial direction and is aligned with the shear line with the outer peripheral surface of the so-called inner cylinder 25 as a reference. In addition, since the internal structure of the cylinder lock 2 is not a limiting requirement of the present invention, description thereof is omitted.

ところで、シリンダー錠２の外筒２３は、ハウジング４の第２嵌合部分２１の小径孔２１ａに嵌着する円筒状部分２３ａと、この円筒状部分２３ａの外周壁に連設し、かつ、第２嵌合部分２１の嵌合溝２１ｂに嵌合する突起の長板状部分２３ｂとを有する（図６参照）。 By the way, the outer cylinder 23 of the cylinder lock 2 is connected to the cylindrical portion 23a fitted into the small diameter hole 21a of the second fitting portion 21 of the housing 4, the outer peripheral wall of the cylindrical portion 23a, and 2 has a long plate-like portion 23b of a protrusion that fits into the fitting groove 21b of the fitting portion 21 (see FIG. 6).

また、シリンダー錠２の内筒２５は、外筒２３の嵌合孔２４に差し込むようにして外筒２３に挿着されるが、本実施例の内筒２５のフランジ状先端部分２５ａは、外筒２３の先端面から突出し、一方、内筒２５の駆動軸２６の一部は、外筒２３の後端面から多少突出する。先端部分２５ａはハウジング４の環状支持壁１６の小嵌合部（小嵌合孔）１７を貫通し、貫通した部分に保護部材７が嵌着している（図１参照）。 Further, the inner cylinder 25 of the cylinder lock 2 is inserted into the outer cylinder 23 so as to be inserted into the fitting hole 24 of the outer cylinder 23, but the flange-like tip portion 25a of the inner cylinder 25 of this embodiment is On the other hand, a part of the drive shaft 26 of the inner cylinder 25 protrudes somewhat from the rear end surface of the outer cylinder 23. The front end portion 25a passes through a small fitting portion (small fitting hole) 17 of the annular support wall 16 of the housing 4, and the protective member 7 is fitted in the penetrating portion (see FIG. 1).

（４）引き抜き防止板２０
引き抜き防止板２０としての一例は、環状の係止板である。シリンダー錠２の外筒２３よりも大径の係止板２０は、本実施例では、図８で示すように環状に形成された硬質のリングで、「テールリング」と称すべき該係止板２０は、前述した内筒２６の駆動軸２６の円柱状突出部分２６ａに外嵌合するように嵌着し、かつ、固定手段（止め輪、ナットなど）３１で駆動軸２６から外れないように支持されている。前記固定手段３１は、止め輪の場合を用いるケースは、突出部分２６ａに周溝を形成し、一方、ナットを用いるケースは、突出部分２６ａにオネジを形成する。 (4) Pull-out prevention plate 20
An example of the pull-out prevention plate 20 is an annular locking plate. In this embodiment, the locking plate 20 having a diameter larger than that of the outer cylinder 23 of the cylinder lock 2 is a hard ring formed in an annular shape as shown in FIG. 20 is fitted so as to be externally fitted to the columnar protruding portion 26a of the drive shaft 26 of the inner cylinder 26, and the fixing means (retaining ring, nut, etc.) 31 is not detached from the drive shaft 26. It is supported. As for the fixing means 31, a case using a retaining ring forms a circumferential groove in the protruding portion 26 a, while a case using a nut forms a male screw in the protruding portion 26 a.

本発明の第１実施例に於いて、ハウジング４の第１嵌合部分１９に嵌合する係止板２０は、シリンダー錠の内筒（例えば駆動軸の突出部分）に固定される環状リングである旨を説図したが、本発明の目的を達成することができる限り、例えばシリンダー錠の外筒（例えば外筒の後端部の端面）に固定手段を介して固定しても良い。後者の場合は、内筒が外筒から容易に抜けないシリンダー錠に適合する。 In the first embodiment of the present invention, the locking plate 20 fitted to the first fitting portion 19 of the housing 4 is an annular ring fixed to the inner cylinder of the cylinder lock (for example, the protruding portion of the drive shaft). As described above, as long as the object of the present invention can be achieved, the outer cylinder of the cylinder lock (for example, the end surface of the rear end portion of the outer cylinder) may be fixed via a fixing means. In the latter case, it is suitable for a cylinder lock in which the inner cylinder cannot be easily removed from the outer cylinder.

本発明は、主に建具や錠前の業界で利用される。 The present invention is mainly used in the joinery and lock industry.

図１乃至図１１は本発明の最良の実施例を示す各説明図。
本発明の実施形態の一例を示す一部概略断面説明図。扉の正面視からの説明図。要部（ハウジング）の概略断面説明図。図３の４−４線断面説明図。図３の５−５線断面説明図。要部（シリンダー錠）の概略説明図。図６を基準とした右側面からの概略説明図。要部（引き抜き防止板）の概略説明図。先端部側から見たシリンダー錠と引き抜き防止板と固定手段の説明図。テールピース側から見たシリンダー錠と引き抜き防止板と固定手段の説明図。本発明の効果を示す説明図。 FIG. 1 to FIG. 11 are explanatory views showing the best embodiments of the present invention.
The partial schematic cross section explanatory drawing which shows an example of embodiment of this invention. Explanatory drawing from the front view of a door. The schematic cross-section explanatory drawing of the principal part (housing). FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 in FIG. Schematic explanatory drawing of the principal part (cylinder lock). The schematic explanatory drawing from the right side on the basis of FIG. The schematic explanatory drawing of the principal part (draw-out prevention board). Explanatory drawing of the cylinder lock seen from the front-end | tip part side, a drawing-out prevention board, and a fixing means. Explanatory drawing of the cylinder lock seen from the tail piece side, a pull-out prevention board, and a fixing means. Explanatory drawing which shows the effect of this invention.

Explanation of symbols

１…扉、２…シリンダー錠、３…サムターン、４…ハウジング、５…内座、６…固着具、７…保護部材、８…化粧リング、９…第２固着具、１１…鍔部、１２…貫通孔、１３…先端部、１４…後端部、１５…横向き凹所、１６…環状支持壁、１７…小嵌合部、１８…大嵌合部、１９…第１の嵌合部分、２０…引き抜き防止板（係止板）、２１…第２嵌合部分、２３…外筒、２４…嵌合孔、２５…内筒、２６…駆動軸、２７…駆動突片、３１…固定手段、３５…工具。 DESCRIPTION OF SYMBOLS 1 ... Door, 2 ... Cylinder lock, 3 ... Thumb turn, 4 ... Housing, 5 ... Inner seat, 6 ... Adhering tool, 7 ... Protective member, 8 ... Cosmetic ring, 9 ... Second fixing tool, 11 ... Gutter, 12 DESCRIPTION OF SYMBOLS ... Through-hole, 13 ... Front-end | tip part, 14 ... Rear-end part, 15 ... Lateral recess, 16 ... Annular support wall, 17 ... Small fitting part, 18 ... Large fitting part, 19 ... 1st fitting part, DESCRIPTION OF SYMBOLS 20 ... Pull-out prevention board (locking plate), 21 ... 2nd fitting part, 23 ... Outer cylinder, 24 ... Fitting hole, 25 ... Inner cylinder, 26 ... Drive shaft, 27 ... Drive protrusion, 31 ... Fixing means 35 ... Tool.

Claims

In the door lock comprising a cylindrical housing fixed to the door and a cylinder lock fixedly mounted in the housing, a plurality of fitting portions continuous to the housing are formed, and the fitting portions One is formed in a stepped shape at the end of the rear end of the housing, and is fitted with a cylinder lock pull-out prevention plate, and communicates with the first fitting portion and is a cylinder. A second fitting portion on which an outer cylinder of the lock is fitted, and the pull-out prevention plate is fixed to the cylinder lock via a fixing means and is locked to the stepwise vertical inner peripheral surface. A door lock characterized by that.

The first fitting portion 19 is an annular rearward-facing large-diameter recess, while the pull-out prevention plate is fixed to the drive shaft of the inner cylinder and has a stepped vertical inner periphery. A door lock, which is an annular locking plate 20 locked to a surface.

In claim 1, an annular lateral recess 15 having an annular support wall 16 is formed at the front end of the housing, and the cylinder lock protection member 7 is fitted into the lateral recess 15 in a close contact state. A door lock characterized by that.