JP4702681B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device, and more particularly, to a locking device that can easily switch between an empty lock and a locking device having a locking function by a combined key and has a simple structure and an easy locking operation. .

  A normal lock device (lock) can actually switch between an empty lock and a lock device having a lock function by a combined key.

  For example, the lock provided at the door of the dwelling unit of a general house or apartment is unlocked if the cylinder lock is unlocked from the outside of the door with a key, and the lock is unlocked from the outside or from the inside with a handle or knob. If you retract the latch bolt, you can freely enter and exit the door.

  However, the mechanism for switching between the unlocked state and the locked state, and the mechanism for operating the latch bolt in the unlocked state are actually complicated, and the electric lock described in Patent Document 1 described later is drawn diagrammatically. However, the locking bar 11 is provided by the dead cam 14 connected to the cylinder lock so that it can be locked and unlocked even during a power failure.

  In addition, the latch bolt operating mechanism 3 for operating the latch bolt 2 that also functions as a dead bolt in the unlocked state is fitted to an unnumbered square hole, and both ends of the latch bolt operating shaft passing through the door and the lock box. It is the structure where the handle is attached to.

Although not shown, there is also a cylinder lock incorporated in a knob coaxially mounted on the door.
Japanese Utility Model Publication No. 6-28617

  Although it is a well-known fact that the above-mentioned locking device performs its function sufficiently and is practically used, for example, it is suitable as a lock for a door opening, but for other uses, it is a large atmosphere. There is something that is not appropriate.

  For example, for example, a waist-height door that closes the entrance of a bank counter is usually an empty lock so that employees can go in and out, but a cylinder lock is attached to lock the door when necessary.

  The lock device attached to this door is usually the same as that installed in the door of the dwelling unit. In this case, the structure is complicated and the operation is troublesome compared to the function required for this lock device. can not deny.

  Even so, since a lock device suitable for such purposes has not been provided in the past, a lock for a general door opening has been diverted and used even if there is a sense of breaking a chicken with a cow sword.

  Accordingly, an object of the present invention is to provide a locking device that has a simple structure, is not large, and that can be easily locked and unlocked.

  In order to achieve the above object, the invention according to claim 1 is a dead bolt which is guided in a lock box so as to be movable in the front-rear direction perpendicular to the front plate, and whose front end is urged in a direction protruding from the front plate. Lever bolt that doubles as a latch bolt and a substantially vertical front part and a substantially horizontal rear part. The overall shape is a substantially L-shaped lever body, and the central part is around a rotation axis perpendicular to the side plate of the lock box. A drive lever that is supported so as to be swingable, engages the free end of the front portion with the latch bolt, and is biased in a direction in which the free end of the front portion is separated from the latch bolt, and the overall shape is substantially L-shaped. In the indoor door surface, the inner handle mounted so as to be swingable around the horizontal axis, and the bottomed block body whose horizontal projection shape is substantially U-shaped, with the opening facing the outdoor side, the door surface on the outdoor side The guide block mounted on the The outer handle is shaped like a letter and covers the opening of the guide block so that the central portion can swing around the horizontal axis, and the horizontal portion on the door side of the inner handle and the central protrusion of the outer handle The inner and outer operation shafts projecting in the direction of the lock box are integrally formed, and the free ends of the inner and outer operation shafts in the lock box are engaged with the rear portion of the drive lever from the direction opposite to the biasing direction. In addition, a stopper is provided to set these normal angular positions in a normal state where no external force acts on the inner and outer handles, while a cylinder lock is mounted on the inner surface of the locking end on the bottom side of the guide block of the outer handle, A locking piece extending in the radial direction is fixed to the inner end of the inner cylinder of the cylinder lock, and a locking groove is formed on the inner surface of the bottom of the guide block, and the angle at which the outer handle covers the opening of the guide block. In location, by causing it engaged the engaging piece with the engaging groove by a duplicate key, characterized in that so as to lock the outer handle.

  In the locking device according to the first aspect of the present invention configured as described above, in the state where the outer handle is not locked, the inner and outer handles have the same operating direction as the rear portion of the drive lever. Therefore, the latch bolt can be retracted from the front plate of the lock box by pushing the operation end of the inner handle and / or the outer handle in the unlocking direction. That is, it becomes an empty tablet state.

  In addition, when the outer handle is locked by the cylinder lock, the latch bolt can be freely moved in and out of the front plate from the indoor side, while the latch bolt cannot be controlled from the outdoor side. Can be locked.

  Furthermore, since the inner handle and the outer handle and the latch bolt are connected via a single drive lever, the structure as a locking device is very simple, and the operation ends of the inner and outer handles are simply connected. Since it is only necessary to push and pull, various effects such as easy operation are obtained.

  The inner and outer operation shafts of the inner and outer handles are linked to the latch bolt that also functions as a dead bolt via the same drive lever, so when the outer handle is not locked, the inner and outer handles are operated independently to control the latch bolt. It was possible to lock the outer handle, and it was possible to provide a locking function as in the case of a normal lock, and the overall configuration was simplified.

Embodiments of the present invention will be described below with reference to the drawings.
In addition, this embodiment is a lock device attached to a door provided on the fence, between the platform of the railway station and the track, and there is a fence and a passage for workers related to the station, on the track side. The general public is not allowed to enter, and the station staff who goes to the track side unlocks the outer handle with the key, so that it can be returned without the key when returning to the platform.

  FIGS. 1 to 3 show the structure of a so-called push-pull latch according to the applicant's manufacturing and sales. This push-pull latch is shown in FIG. It shall be open.

  When the push-pull latch stands on the outside (right side) of the door 1 and pulls the operation end (upper end) of the outer handle 2 shown in FIG. 1, the front end of the latch bolt 4 is pulled in from the front plate 5 of the lock box. When the outer handle 2 is pulled by continuing the operation of retracting the door, the door 1 opens. Conversely, when the operation end of the inner handle 3 is pushed from the outdoor side to the door side, the latch bolt 4 is retracted from the front plate 5. The door is opened by pressing the inner handle.

  Although the structure of this push-pull latch is not the gist of the present invention, as will be described later, since the lock device in the first embodiment partially uses the structure of the push-pull latch, the structure of this push-pull latch will be described first. To do.

  2 and 3, reference numeral 6 denotes a lock box, in which a latch bolt 4 that also serves as a dead bolt is housed.

  The latch bolt 4 is guided so as to be movable in the front-rear direction perpendicular to the front plate 5 (left-right direction in FIGS. 2 and 3), and the front end of the latch bolt 4 is caused by the elasticity of the latch spring 7 as a compression coil spring. It is urged in the direction protruding from.

  The latch spring 7 is elastically mounted between a spring hook block 8 fixed to the lock box 6 and a front end portion of a latch bolt. This spring-loaded block also serves as a guide for the latch bolt 4.

  On the other hand, a pair of first and second drive levers 11 and 12 are disposed behind the guide member 9 (see FIG. 2) of the latch bolt 4.

  Among these, since the first drive lever 11 is adopted as the configuration of the present invention, the first drive lever 11 will be described first.

  The first drive lever 11 is a lever body having a substantially L-shaped overall shape, in which a substantially vertical front portion and a substantially horizontal rear portion in FIG. 2 are connected, and its central portion is suspended from the side plate of the lock box. The support shaft 13 is swingably supported.

  And the free end 11a (refer FIG. 3) of the front part is engaged with the step part 4a of the back of the latch bolt 4 from the front. Alternatively, as shown in FIG. 3, the free end 11a is faced from the front so as to be engageable with the stepped portion 4a.

  The first drive lever 11 is rotated clockwise in FIG. 2, in other words, from the front free end 11a and 4 by the elasticity of the drive lever spring 14 (see FIG. 2) wound around the support shaft 13. It is biased in the direction of separation.

  A second drive lever 12 configured symmetrically is disposed below the first drive lever 11 in FIG. 2, but the second drive lever 12 is not necessary in the locking device according to the present invention. Further detailed description is omitted.

  Furthermore, as shown in FIGS. 2 and 3, a stopper 15 covered with rubber or plastic is fixed between the rear portions of the first and second drive levers 11 and 12.

  Then, as shown in FIG. 2, between the rear portion of the first drive lever 11 and the stopper 16, a longitudinal slit 17 opened on the side surface of the lock box is passed through an outer operation shaft 16 (FIG. 1) of the outer handle 2. The free end in the lock box is inserted.

  Similarly, an inner operation shaft 18 of the inner handle 3 (see FIG. 1) is inserted between the rear portion of the second drive lever 12 and the stopper 16.

  As shown in FIG. 4, the inner handle 3 according to the present invention has a substantially L-shape as a whole, and is mounted so as to be able to swing around a horizontal shaft 19 on the indoor door surface.

  An inner operation shaft 18 that protrudes toward the lock box is formed integrally with the horizontal portion on the door side of the inner handle 3, and this inner operation shaft 18 differs from that shown in FIGS. It is inserted between the drive lever 11 and the stopper 15 (see FIG. 2).

  As will be described later, since the outer operation shaft 16 of the outer handle 2 is also inserted between the first drive lever 11 and the stopper 15, the inner and outer operation shafts 18, 16 are arranged in the horizontal direction as is apparent from FIG. 2. It is also possible to arrange and be cramped, but in that case, the horizontal width of the inner and outer operation shafts 18 and 16 is halved, or the position of the slit 17 (see FIG. 2) is changed in the front-rear direction, etc. Can be used.

  On the other hand, in the present invention, unlike the conventional push-pull latch shown in FIG. 1, the outer handle 2 is configured to be slightly smaller.

  The outer handle 2 is attached to the door surface on the outdoor side via the guide block 21.

  As shown in FIGS. 4 to 6, the guide block 21 is a bottomed block body whose horizontal projection shape is substantially U-shaped. For example, the guide block 21 is mounted on the door surface on the outdoor side with the bottom facing downward and the opening facing the outdoor. Has been.

  As shown in FIGS. 4 and 5, the outer handle 2 in the illustrated embodiment is a block-shaped body having a cross-sectional shape or a side shape, and covers the opening of the guide block 21 so that the central portion is a horizontal axis. It is supported so that it can swing around 19.

  As described above, the outer operating shaft 16 that protrudes in the direction of the lock box is formed at the central protrusion of the outer handle.

  On the other hand, a cylinder lock 22 is mounted on the inner surface of the lower end of the outer handle, in other words, the inner surface of the locking end opposite to the operation end that is the upper end of the horizontal shaft 19.

  On the inner end of the inner cylinder of the cylinder lock 22, for example, an oblong locking piece 23 extending in the radial direction of the cylinder lock is fixed.

  Further, as shown in FIG. 5, a locking groove 24 is formed on the inner surface of the bottom of the guide block. As shown in FIG. 4, the outer handle 2 is positioned at an angular position that completely covers the opening of the guide block by a key. By rotating the inner cylinder of the cylinder lock, the locking piece 23 can be engaged with the locking groove 24 and the outer handle 2 can be locked.

  In the locking device according to one embodiment of the present invention configured as described above, the outer handle cannot be operated when the outer handle 2 is locked and fixed to the guide block 23 as shown in FIG. .

  Therefore, as described above, when the lock device is mounted on a door installed between the platform of the station and the track, the door cannot be opened from the platform side.

  If a station employee who has a job on the track unlocks the outer handle using the key of the cylinder lock, the door can be opened by operating the outer handle 2 that has become free.

  In this case, it is desirable to lock the outer handle as soon as the door is opened. In this case, the station staff who moved to the track side with respect to the door can close the door by operating the inner handle.

  When the work is done, operate the inner handle to open the door, move to the home side, then place your hand on the locked outer handle and pull or push the door in the closing direction. Locked.

The front view of the conventional push pull latch. The partial cross section side view of the lock box. The partial cross section top view of the lock box. 1 is a front view of a locking device according to an embodiment of the present invention, showing a state where an outer handle is locked. FIG. FIG. 5 is a front view of the same locking device as in FIG. 4, in which the inner handle is omitted and the outer handle is unlocked. The front view of an outer side handle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 2 Outer handle 3 Inner handle 4 Latch bolt 5 Front plate 6 Lock box 7 Latch spring 8 Spring hook block 9 Guide member 11 First drive lever 12 Second drive lever 13 Support shaft 14 Drive lever spring 15 Stopper 16 Outer operation shaft 17 Slit 18 Inner Operation Shaft 19 Horizontal Shaft 21 Guide Block 22 Cylinder Lock 23 Locking Piece 24 Locking Groove

Claims (1)

  Latch bolts that serve as dead bolts that are guided in the lock box so as to be movable in the front-rear direction perpendicular to the front plate, and whose front ends are urged in the direction protruding from the front plate, a substantially vertical front portion and a substantially horizontal rear portion Is a lever body that is generally L-shaped and is supported so that its central part can swing around a rotation axis perpendicular to the side plate of the lock box, and the free end of the front part is engaged with the latch bolt. And a drive lever whose front end is biased in a direction away from the latch bolt, and the overall shape is substantially L-shaped, so that it can swing around the horizontal axis on the indoor door surface. The installed inner handle, the bottomed block body whose horizontal projection shape is approximately U-shaped, the guide block mounted on the door surface on the outdoor side with the opening facing outside, and the cross-sectional shape is approximately T-shaped, guide Center the block opening An outer handle that is guided so as to swing around a horizontal axis, and an inner and outer operation shaft that protrudes in the direction of the lock box are integrated with the horizontal portion on the door side of the inner handle and the central protrusion of the outer handle, respectively. In the normal state where the free ends of the inner and outer operating shafts in the lock box are engaged with the rear portion of the drive lever from the direction opposite to the biasing direction, and no external force acts on the inner and outer handles. A stopper for setting these normal angle positions is provided. On the other hand, a cylinder lock is mounted on the inner surface of the lock end on the bottom side of the guide block of the outer handle, and the inner lock of the cylinder lock is extended radially. The stopper piece is fixed, and on the other hand, a locking groove is formed on the inner surface of the bottom of the guide block, and the locking piece is engaged with the locking groove by a key at an angular position where the outer handle covers the opening of the guide block. And, the lock device being characterized in that so as to lock the outer handle.

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