JP2001254551A - Locking apparatus for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the usability of a one-door two-lock locking apparatus. SOLUTION: Engaging pins 14, 14 engaging with driving levers 12 are simultaneously raised by engaging edges 19, 19 which are one open edges of a pair of notches 18, 18 formed in front side edges of an interlocking rod, and a driven gear 6 coaxially connected to a dead cam 5 by a driving gear 13 of the driving lever 12 is counter-clockwise rotated. Then, upper and lower dead bolts 4, 4 are frontward protruded at the same time, whereby locking operation of one of locking-unlocking units 3 simultaneously locks the other locking-unlocking unit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door locking device (hereinafter simply referred to as a "locking device"), and more particularly to a novel locking device that does not allow picking.

[0002]

2. Description of the Related Art Conventionally, a so-called one-door two-lock device in which two locking devices are mounted on one door has been put to practical use.

In this one-door two-lock, two lock boxes are attached to a free edge of one door along a vertical direction. Each lock box includes at least a dead bolt and a dead cam device for operating the dead bolt. It has a cylinder lock and a thumb turn on the inside of the room. Usually, two cylinder locks are locked and unlocked with a single key.

[0004] The one-door to two-lock device exists because the picking operation is doubled to make picking extremely difficult.

[0005]

When two cylinder locks are mounted, the picking time of one cylinder lock, which is the psychological limit time of the criminal, is doubled. Hesitated to do so, and one-door to two-lock has been proven to be a secure security device.

However, since the locking and unlocking operation is doubled even for the authorized owner of the duplicate key, it is often troublesome. If it is normal to lock only one cylinder lock when going out, a one-door to two-lock with a special angle is required. Is no different from a normal locking device.

Therefore, the invention according to claim 1 provides a locking device in which when one of the cylinder locks or the thumb turn is operated in the locking direction, the other cylinder lock can be locked in conjunction therewith. The purpose is to improve the usability of one-door two-lock.

[0008] The invention described in claim 2 is the first invention.
In addition to the function of the locking device according to the invention described in (1), if one cylinder lock is unlocked and another cylinder lock is not unlocked within a predetermined time, the dead bolt cannot be retracted after unlocking the other cylinder lock. To provide a locking device,
The purpose is to improve the security against picking.

[0009]

In order to achieve the above object, an invention according to claim 1 is characterized in that a dead bolt guided in a front-rear direction perpendicular to a front plate, a cylinder lock and a thumb turn are connected to each other, A pair of locking / unlocking units each having a locking cam protruding forward from the plate and a dead cam for selectively driving a deadbolt in one of an unlocking position to be drawn into the lock box are vertically moved in one lock box. A drive gear formed at the front end of the driven cam, the driven gear being coaxially coupled with the driven gears of the respective dead cams, and having a central portion rotatably supported by a side plate of the lock box behind each driven gear. Is provided with a driving lever having an engaging pin projecting from the rear end thereof, and extending vertically in the rear of the pair of driving levers so as to be movable in the same direction. With an interlocking rod, and the drive lever A pair of vertically long notches are formed in the front side edge portion of the interlocking rod that interferes with the engagement pin when in the lock angle position, corresponding to each of the pair of engagement pins. The opening edge above or below the notch that engages with the engagement pin when the rod moves in the locking direction is designated as the engagement edge, and one end can be turned to the other opening edge of the notch of the interlocking rod. When the interlocking rod is in the unlocked position, an engaging pin is sandwiched between the other end of the control lever and the engaging edge of the notch of the interlocking rod, and When the lever is in the locking position and the drive lever is in the unlocking angle position, the other end of the control lever rotates in the direction in which the other end of the control lever moves backward with respect to the rotation in the locking direction of the drive lever and interferes with the engagement pin. The feature is that it avoids.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a mechanical timer having a spring and a governor is provided near an end of the interlocking rod in the unlocking direction. The center part is supported by the output shaft of this timer, and one end of a timer arm that rotates in a plane parallel to the side plate of the lock box is a set end and the other end is an operation end, while the interlocking rod is in an unlocked position. At one time, a rotation shaft is positioned in front of one end of each control lever, and one end of the stop lever is rotatably supported on the rotation shaft, and when the stop lever is horizontal, the other end of the control lever is The length of the stop lever is set so as to be close to one end, and the other ends of the pair of stop levers are mutually linked to each other by a first connection link to form a parallelogram-shaped crank mechanism. One connecting link and working end of timer arm The link is connected via the second connecting link, and when the interlocking rod is in the locked position, the other end of the set lever that is pivotally supported at one end at the end in the unlocking direction is set with the timer arm. When one control lever is rotated in the unlocking direction by unlocking one locking / unlocking unit, the movement of the interlocking rod in the unlocking direction causes the timer arm to move through the set lever. Is set, the other end of the pair of stop levers is separated from the position facing one end of the control lever by the rotation of the operating end, and the other control lever allows the unlocking of another locking / unlocking unit, and is set by the timer. After a lapse of a given time, the movement of the working end is transmitted to the pair of stop levers via the first and second connecting links, and the other end is brought close to one end of the control lever to prevent its rotation. What I tried to do And butterflies.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Note that, for convenience of explanation, the invention described in claim 1 will be described first. 1 to 3, reference numeral 1 denotes a lock box, and the lock box 1 is embedded in the free side edge of the door with the front plate 2 flush with the free side edge of the door.

In the lock box 1, a pair of locking / unlocking units 3, 3 are connected in a vertical direction.

Each locking / unlocking unit 3 has at least a dead bolt 4 and a dead cam 5, of which the dead bolt 4 is moved in a front-rear direction (lateral direction in the figure) perpendicular to the front plate by a guide mechanism not shown. It is guided to be movable.

The dead cam 5 is linked to an inner cylinder of a cylinder lock (not shown) or a thumb turn on the indoor side, and a locking position (see FIG. 2) where the dead bolt 4 protrudes forward from the front plate 2; It is selectively driven to any of the unlocking positions (see FIG. 1) to be drawn into the box 1.

The dead cam 5 in the illustrated embodiment is a thick plate having a substantially fish-like shape integrally joined to the back side of the driven gear 6 and a portion corresponding to the tail thereof being a dead bolt 4.
The deadbolt 4 is engaged with a driven notch 7 formed in a part of the front plate 2 by rotating the driven gear 6 around the rotation axis of the driven gear 6 by operating a duplicate key or a thumb turn.
Haunt from.

In the illustrated embodiment, the first connecting gear 8 located above the driven gear 6 in each locking / unlocking unit 3 is connected to the second connecting gear 9 located below the thumb turn (not shown).
Are respectively linked to the inner cylinder of a cylinder lock (not shown) via a clutch.

It is not an essential constitution of the present invention to unfold the dead cam 5, the thumb turn and the cylinder lock in a plane along the side plate of the lock box 1 as described above. The clutch, the dead cam 5, and the thumb turn may be connected in the thickness direction of the door.

In FIG. 1, reference numeral 11 denotes a click rod, and the click rod 11 utilizes a force of a compression coil spring (not shown) wound around the click rod to rapidly expand on the left and right sides of the thought point. A snap action is given to the movement of the dead bolt 4 when locking and unlocking.

A drive lever 12 is disposed behind (to the left in the figure) each of the driven gears 6 configured as described above.

The drive lever 12 in the illustrated embodiment is a sector gear, and the central axis of the gear is rotatably supported on the side plate of the lock box 1.

A drive gear 13 formed at the front end of the drive lever 12 is meshed with and engaged with the driven gear 6, and an engagement pin 14 projects from the rear surface of the rear end.

An interlocking rod 15 extending vertically along the back plate of the lock box behind the pair of drive levers 12,12.
Are arranged so as to be movable in the same direction.

In the illustrated embodiment, the interlocking rod 15 integrally connects a pair of elongated plate members by a plurality of connecting columns 16 and 16 and has an unnumbered slot formed in the center thereof in the side plate. The pair of guide posts 17, 17 are movably guided in the vertical direction.

Then, as shown in FIG.
When 2 is in the unlocking angle position, a pair of a front side edge of the interlocking rod 15 that interferes with the engaging pin 14 (in the illustrated embodiment, a front side edge of the front plate member) is provided with a pair. A pair of vertically long notches 18, 18 are formed corresponding to the engagement pins 14, 14, respectively.

Engagement pin 1 when each notch 18 moves in the locking direction
The lower open edge engaging with 4 is designated as engaging edge 19 (see FIG. 2).

Each notch 18 is closed by a control lever 21 described below, leaving a gap in which the engaging pin 14 of the drive lever is engaged at the time of unlocking.

That is, the control lever 21 in the illustrated embodiment has a plate member bent into a U-shape in cross section, the vertical bar portion of the U-shape is directed forward, and the projected shape of the lock box on the side plate is inverted L. One end (upper end) of the lever is rotatably supported by the first support shaft 22.

The control lever 21 is urged in the counterclockwise direction by the elastic force of a torsion coil spring (not shown) wound around the first support shaft 22, but the control lever 21 is in a normal state where no external force acts on the control lever 21. In FIG. 1, the rear edge at one end is locked to the connecting column 16, and the angular position as shown in FIG. 1, that is, the angle at which the front surface is aligned with the front edge of the interlocking rod 15 and closes most of the notch. It keeps its position.

As shown in FIG. 1, the length of each control lever 21 in the up-down direction is such that the engagement pin 14 of the drive lever at the unlock angle position is connected to the engagement edge 19 of the interlocking rod and the control lever. Is set to such an extent that it can be sandwiched with a margin with the other end edge (lower end edge).

The locking device according to an embodiment of the present invention having the above-described configuration is assumed to lock, for example, a lower cylinder lock in order to go out of the unlocked state shown in FIG.

Then, since the lower second connecting gear 9 in FIG. 1 rotates clockwise, the driven gear 6 meshing with the second connecting gear 9 rotates counterclockwise, and the drive lever 12 rotates clockwise.

Accordingly, the dead cam 5 pushes the dead bolt downward and the engagement pin 14 of the lower drive lever pushes the lower edge of the lower portion 21 of the interlocking rod 15 upward.

As a result, the interlocking rod 15 moves upward, and the engagement edge 19 of the upper notch rotates the upper drive lever 12 clockwise through the engagement pin 14 of the upper drive lever. Let it.

That is, the operation of the lower locking / unlocking unit 3 in the locking direction is performed via the interlocking rod 15.
As shown in FIG. 2, both upper and lower dead bolts 4 project forward, and both locking and unlocking units 3 and 3 are locked at the same time.

This operation is the same when the upper locking / unlocking unit 3 is locked. At this time, the upper engaging pin 14 pushes up the interlocking rod 15.

When the family member who has returned home unlocks the upper locking / unlocking unit 3, for example, the upper drive lever 12 rotates counterclockwise from the state shown in FIG. The lower end of the drive lever 12 is engaged with the engagement edge 19, and the further rotation of the drive lever 12, as shown in FIG.
Is pulled into the lock box.

Next, when the lower locking / unlocking unit 3 is unlocked, the engagement pin 14 of the lower drive lever 12 comes into contact with the front surface of the descending control lever 21. As described above, the control lever 21 is in the first position. Since the control lever 21 can rotate around the one support shaft 22 in the clockwise direction, the control lever 21 allows the engagement pin to rotate so that the lower end of the control lever 21 escapes backward.

Then, the lower locking / unlocking unit 3 is also in the unlocked state, and returns to the unlocked state shown in FIG.

That is, in the locking device according to the present invention, when one of the pair of locking and unlocking units 3 and 3 is locked when locking, the other locking and unlocking unit is also locked. As with one-door two-lock systems, they are unlocked one by one.

Next, a locking device according to an embodiment of the present invention will be described with reference to FIG. FIG.
Indicates an unlocked state as in FIG.

In FIG. 4, a mechanical timer 23 is provided at the lower end of the lock box 1. The timer 23 can use a commercially available mechanical timer for the purpose of, for example, measuring cooking time in cooking or controlling the amount of water in a bathtub.

The timer 23 includes a spring such as a mainspring, a ratchet gear that rotates at an increased speed when the spring is unwound, and a governor that engages with the ratchet gear. Since the configuration of such a timer is well known in the art, further detailed description will be omitted.

A timer arm 24 is mounted on the output shaft of the timer 23 so as to be rotatable in a plane parallel to the side plate of the lock box.

The timer arm 24 has a central portion supported by the output shaft of the timer.
The right end is the working end.

On the other hand, as shown in FIG. 4, when the interlocking rod 15 is in the unlocked position, a rotating shaft 25 is positioned in front of one end (upper end) of each control lever 21, and a stop lever is attached to the rotating shaft 25. One end of 26 is rotatably supported.

The length of the pair of stop levers 26, 26 is set such that the other end is close to the upper end of the control lever 21 when the horizontal angle position is set as shown in FIG.

The pair of stop levers 26, 26
Are connected to each other by a first connecting link 27 extending in the up-down direction, to form a parallelogram-shaped hanging crank mechanism.

Further, the lower end of the first connecting link 27
The timer arm 24 is linked to the operating end (right end) of the timer arm 24 via a second connecting link 28.

On the other hand, when the interlocking rod 15 is in the locking position as shown in FIG. 5, the other end of the set lever 29, which is pivotally supported at one end in the unlocking direction, that is, at the lower end, is connected to the timer. The arm 24 is set so as to engage with the set end (left end).

The lower end of this set lever 29 is formed in an inverted L-shape, and the second support shaft 31 which is the center of rotation thereof is
Due to the elasticity of a torsion coil spring (not shown) wound around
Although it is urged counterclockwise in FIG.
In a state where no external force acts on 9, one end thereof is locked by the connecting column 16 to maintain the vertical angular position shown in the figure.

In connection with this set lever 29, the lock box 1
An inverted L-shaped switching lever 32 is rotatably supported on the side plate at the lower end of the inner back plate.

The switching lever 32 is urged clockwise in FIG. 5 by the elastic force of a torsion coil spring (not shown) wound around the third support shaft 33 which is the center of rotation.
In a normal state where no external force acts on the switching lever 32,
The vertical portion contacts the back plate to maintain the illustrated angular position.

The locking device according to the second embodiment constructed as described above, when one of the locking / unlocking units 3 is operated in the locking direction, shifts from the unlocked state shown in FIG. 4 to the unlocked state shown in FIG. As shown in the figure, the upper and lower locking / unlocking units 3, 3 are locked as in the first aspect of the present invention.

When the upper locking / unlocking unit 3 is unlocked from this locked state, for example, as shown in FIG. 6, the interlocking rod 15 is lowered by the rotation of the engaging pin 14 of the upper driving lever.

At the same time, the set lever 29 at the lower end of the interlocking rod
Pushes down the set end of the timer arm 24.

At this time, the tip of the set lever 29 receives a reaction force from the timer arm 24, and the moment for rotating the set lever 29 clockwise by the reaction force is applied to the inner end of the horizontal arm of the switching lever 32. Carried by

When the timer arm 24 is rotated counterclockwise by the set lever 29 as described above, the working end of the timer arm is raised, and the rotation of the timer arm 24 is performed via the second link 28. Transmitted to one link 27,
As shown in FIG. 6, the pair of stop levers 26, 26 rotate clockwise and their rear ends rise.

If the lower locking / unlocking unit 3 is operated in the unlocking direction in this state, even if the engaging pin 14 rotates counterclockwise and the control lever 21 rotates clockwise, Since the upper end does not interfere with the stop lever 26, unlocking is possible.

However, when one locking / unlocking unit 3 is unlocked by picking, it takes a considerable time to unlock the other locking / unlocking unit 3.

At this time, as shown in FIG. 7, the timer arm 24 returns to the original angular position, and the other end (rear end) of each stop lever 26 approaches one end of each control lever 21 from the front. Since this is approached, the engagement pin 14 that attempts to unlock the lower locking / unlocking unit 3 is stopped by the stop lever 26 via the control lever 21 and cannot rotate.

Therefore, the locking device cannot be unlocked unless both cylinder locks are quickly unlocked using the duplicate key.

Incidentally, when the state shown in FIG. 4 or FIG. 7 is changed to the double locked state shown in FIG. 5, the lower step of the set lever 29 rotates the switching lever 32 counterclockwise against the urging force thereof. However, this rotation is possible, and eventually, the engagement between the set lever 29 and the switching lever 32 is released, and the state shown in FIG. 5 is obtained.

[0063]

As is apparent from the above description, the inventions according to the first and second aspects of the present invention simultaneously rotate the pair of drive levers in the locking direction by the pair of engagement edges formed on the interlocking rod. Therefore, the operation of the locking / unlocking unit in the locking direction can simultaneously lock the other locking / unlocking unit, thereby improving the usability of the locking / unlocking device.

When one of the locking / unlocking units is unlocked, the interlocking rod is moved while the engagement pin of the other locking / unlocking unit is disengaged from the interlocking rod. Can be performed independently for each lock unit,
It does not impair the safety of the locking and unlocking device.

Further, according to the invention of claim 2, in addition to the effect of claim 1, a mechanical timer is operated simultaneously with the unlocking operation of one of the locking and unlocking units, and When the stop lever is placed in the disengaged position with the control lever only during operation, it takes a considerable time to unlock one locking / unlocking unit by picking etc. and unlock the other locking / unlocking unit. Thus, there are various effects such as that the unlocking of the other locking / unlocking unit becomes impossible and the safety of the locking device can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a locking device according to an embodiment of the present invention, showing a state in which a pair of locking and unlocking units are both unlocked.

FIG. 2 is a side view of the locking device according to one embodiment of the present invention, showing a state in which a pair of locking and unlocking units are locked together.

FIG. 3 is a side view of the locking device according to one embodiment of the present invention, showing a state in which one of a pair of locking and unlocking units is locked and the other is unlocked.

FIG. 4 is a side view of a locking device according to an embodiment of the present invention, showing a state in which a pair of locking and unlocking units are both unlocked.

FIG. 5 is a side view of a locking device according to an embodiment of the present invention, showing a state in which a pair of locking and unlocking units are locked together.

FIG. 6 is a side view of a locking device according to an embodiment of the present invention, showing a state where one of a pair of locking / unlocking units is unlocked and a timer starts operating.

FIG. 7 is a side view of a locking device according to an embodiment of the present invention, showing a state in which one of a pair of locking and unlocking units is unlocked and a timer has been operated.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lock box 2 front plate 3 locking / unlocking unit 4 dead bolt 5 dead cam 6 driven gear 7 driven notch 12 drive lever 13 drive gear 14 engagement pin 15 interlocking rod 18 notch 19 engagement edge 21 control lever 22 first support shaft 23 Timer 24 Timer arm 25 Rotating shaft 26 Stop lever 27 First connection link 28 Second connection link 29 Set lever 31 Second support shaft 32 Switching lever 33 Third support shaft

Claims (2)

[Claims] 1. A dead bolt guided in a front-rear direction perpendicular to a front plate, a lock position linked to a cylinder lock and a thumb turn, and a locking position protruding forward from the front plate or an unlock position pulled into a lock box. A pair of locking / unlocking units each having a dead cam for selectively driving a dead bolt are vertically connected in one lock box, and a driven gear of each dead cam is coaxially connected. A drive lever having a central portion rotatably supported by a side plate of a lock box behind the driven gear, a driving gear formed at a front end portion meshingly engaged with the driven gear, and an engagement pin protruding from a rear end. An interlocking rod is provided behind the pair of drive levers and extends vertically and is movably guided in the same direction. When the drive lever is in the unlocking angle position, the engagement lever is engaged. Of the front side edge of the interlocking rod that interferes with the pin A pair of vertically long cutouts are formed in the portion corresponding to each of the pair of engagement pins, and the upper or lower opening edge of the cutout that engages with the engagement pin at the time of unlocking is unlocked. A pair of control levers are provided which are rotatably supported on the other open end edge of the notch of the interlocking rod while being designated as an edge, and when the interlocking rod is in the unlocked position, When the engagement pin is sandwiched between the other end edge and the engagement edge of the notch of the interlocking rod, the interlocking rod is in the locking position, and the driving lever is rotated in the locking direction when the driving lever is in the unlocking angle position. Wherein the other end of the control lever pivots in a direction to move rearward to avoid interference with the engagement pin. 2. A dead bolt guided in a front-rear direction perpendicular to a front plate, a lock position linked to a cylinder lock and a thumb turn, and a lock position protruding forward from the front plate or an unlock position drawn into a lock box. A pair of locking / unlocking units each having a dead cam for selectively driving a dead bolt are vertically connected in one lock box, and a driven gear of each dead cam is coaxially connected. A drive lever having a central portion rotatably supported by a side plate of a lock box behind the driven gear, a driving gear formed at a front end portion meshingly engaged with the driven gear, and an engagement pin protruding from a rear end. An interlocking rod is provided behind the pair of drive levers and extends vertically and is movably guided in the same direction. When the drive lever is in the unlocking angle position, the engagement lever is engaged. Of the front side edge of the interlocking rod that interferes with the pin A pair of vertically extending notches corresponding to each of the pair of engaging pins, and upper or lower open ends which engage with the engaging pins when the interlocking rod moves in the locking direction. An edge is designated as an engagement edge, and one end is rotatably supported by the other opening edge of the notch of the interlocking rod.
When a pair of control levers are provided and the interlocking rod is in the unlocked position,
When the engaging pin is sandwiched between the other end of the control lever and the engaging edge of the notch of the interlocking rod, the interlocking rod is in the locking position, and when the driving lever is in the unlocking angle position, the locking of the driving lever is performed. The other end of the control lever rotates in the direction in which the other end moves rearward with respect to the rotation to avoid interference with the engagement pin,
A mechanical arm having a spring and a governor is provided near the end of the interlocking rod in the unlocking direction, and a timer arm whose center is supported by the output shaft of the timer and rotates in a plane parallel to the side plate of the lock box. Is the set end, the other end is the working end,
When the interlocking rod was in the unlocked position, a rotation shaft was positioned in front of one end of each control lever, and one end of the stop lever was rotatably supported on the rotation shaft, and the stop lever was horizontal. When the length of the stop lever is set so that the other end is close to one end of the control lever, the other ends of the pair of stop levers are linked to each other by a first connection link to form a parallelogram-shaped crank. In addition to forming the mechanism, the first connecting link and the operating end of the timer arm are link-connected via the second connecting link, and when the interlocking rod is in the locked position, one end is provided at the end in the unlocking direction. The other end of the swingably supported set lever is engaged with the set end of the timer arm so as to be engageable, and one control lever is rotated in the unlocking direction to unlock one locking / unlocking unit. When the interlocking rod moves in the unlock direction, The timer arm is set via the set lever, and the other end of the pair of stop levers is separated from the position facing one end of the control lever by the rotation of the operation end, and the other lock / unlock unit is unlocked by another control lever. After a certain period of time set by the timer, the movement of the working end is transmitted to the pair of stop levers via the first and second connection links, and the other end is brought close to one end of the control lever. A door locking device for preventing rotation of the door.