JP2013221395A - Crime prevention lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent picking by locking and unlocking a thumb turn in a door locking device where a dead bolt of a door is operated by the thumb turn.SOLUTION: In a locking device where an operation interlock part 47 moves a dead bolt of a door forward and backward by turning a thumb turn 40, a rotary cam 41 provided with a cam recess part 410 is fixed to a rotating shaft 400 of the thumb turn 40, a checker 21 is arranged which vertically moves to alternately engage with the cam recess part 410 and a valley part 310 of a lock plate 31, a key ridge number of lock plates 31 are set to the checker 21, and key ridges 360 inserted into openings 312 of the lock plates 31 push the inner edges of the openings 312 and rotate the lock plates 31 to align the valley parts 310 relative to the checker 21, which allows the checker 21 to fall and allows the thumb turn 40 to rotate, whereby the thumb turn 40 is placed in lock and unlock states to be locked and unlocked.

Description

  The present invention relates to a locking device for a thumb turn device that prevents unauthorized unlocking.

Many of the conventional locks are so-called cylinder locks. In the structure of these cylinder locks, an inner cylinder is accommodated in a cylinder called an outer cylinder, and the outer cylinder is fixed to a casing of the lock. The inner cylinder has a keyhole, and a tumbler is arranged so as to straddle the outer cylinder and the inner cylinder. If the key is not correct, the tumbler prevents the inner cylinder from rotating.
When the correct key is inserted, all tumblers move to a position where they do not become an obstacle, and the inner cylinder can be rotated.
Examples of typical cylinder locks include pin cylinder locks and disk cylinder locks.

(1) Pin cylinder lock:
It is a cylinder lock that uses a pin-shaped tumbler called a pin tumbler. It is divided into an upper pin and a lower pin, and is pressed against the inner cylinder side by a spring. When the key is not inserted, the upper pin becomes an obstacle and the inner cylinder does not rotate. By inserting the correct key, the shear line between the upper pin and the lower pin is aligned between the inner side and the outer side, and the inner cylinder can be rotated. When a different key is inserted, the shear line is not aligned, so the upper pin or the lower pin becomes an obstacle and the inner cylinder cannot be rotated.

(2) Disc cylinder lock:
This is a cylinder lock that uses a disk-shaped tumbler called a disk tumbler. This disc tumbler and spring are contained in the inner cylinder, and when the key is not inserted, one side of the tumbler protrudes to the outer cylinder side, so that the inner cylinder cannot be rotated. By inserting the correct key, the tumbler fits in the inner cylinder and can be rotated. If the key is incorrect, the inner cylinder cannot be rotated because one of the tumblers pops out of the outer cylinder.
The above two types of cylinder locks are the most popular at present, but both of them are unlocked by the picking action and suffer from damage such as theft.

Japanese Patent No. 486045 Japanese Patent No. 4083843

  The present invention is a door lock that locks a thumb-turn device that operates a dead bolt in a door locking device, and it is a technical problem to effectively prevent and disable unauthorized unlocking.

The present invention relates to an outer shell that houses a locking device, a thumb turn mechanism that rotates a dead bolt by operating a knob, a braking mechanism that brakes the drive of the dead bolt of the thumb turn mechanism, and an unlocking and locking mechanism that operates a key. A door locking device composed of a keyhole mechanism,
The thumb turn mechanism is provided with a rotating cam via a clutch with respect to the thumb turn rotating shaft that operates and drives the dead bolt by the turning operation of the knob.
The braking mechanism is arranged by urging the checker that fits into the concave portion of the rotating cam and prevents its rotation up and down and is urged upward by a resilient force so as to be fitted into the concave portion. The door of the brake mechanism can be locked and unlocked by allowing the checker of the brake mechanism to be moved up and down by operating a key to prevent or rotate the rotation cam of the thumb-turn mechanism,
Therefore, a cylinder that has a keyhole to insert the key and rotates with the key,
Including a number of lock plates corresponding to the number of key piles provided with openings that form spaces for accommodating the cylinders, and plates serving as spacers interposed between the lock plates;
The cylinder is provided with a return cam that rotates in the opening of the lock plate together with the key inserted from the keyhole, contacts the inner edge of the opening at one end of rotation, and aligns the lock plate in a limited position of the rotation; Abutting the opposite side of the opening with the key ring by rotating in the reverse direction, rotating the lock plate to an angle corresponding to the height of the key ring at the limited position of the rotation,
In addition, the lock plate is supported so as to be independently rotatable by an axis parallel to the cylinder, and the periphery facing the checker is formed into a circular shape of a rotation circle so that each lock plate is in contact with the key mountain to be in a limited rotation position. The main feature is that a trough for receiving the lower end of the checker is formed at a position opposite to the checker in each lock plate when reaching.

In addition, a clutch is interposed between the rotating cam and the thumb-turn rotating shaft to avoid damage due to the clutch idling due to an excessive load on the thumb-turn, and further, with a trough on the periphery of the lock plate facing the checker. By providing the saw tooth, the saw tooth is locked by the checker against the operation of the lock plate due to picking or the like to prevent the lock plate from rotating, thereby preventing unlocking due to these unauthorized actions.

  The locking device of the present invention makes it practically impossible to perform unauthorized unlocking operations such as picking, and can ensure safety.

In the present invention, the door is locked and unlocked by operating the dead bolt by turning the thumb turn knob,
The keys are respectively brought into a locked / unlocked state of the door by performing an operation to make the thumb turn unlockable or locked.
Therefore, the thumb-turn lock / unlock operation and the door locking / unlocking operation with the key are to lock the door by turning the key to unlock the thumb and turning the thumb to advance the dead bolt. Lock the door and turn the key in the reverse direction to unlock the thumb turn and remove the key.
To unlock the door, turn the key to unlock the thumb turn, turn the thumb turn to retract the deadbolt to unlock the door, and turn the key in the reverse direction to rotate the thumb turn. Remove the key as unlocked.
The configuration of the present invention for performing these operations will be described below with reference to the drawings.
〔Example〕
1 to 4 show a thumb-turn locking device according to one embodiment of the present invention.
The present invention includes an outer shell 1, a braking mechanism 2, a keyhole mechanism (lock mechanism) 3, and a thumb turn mechanism 4.
The outer shell 1 is a case that accommodates the locking device, and includes a housing 10 on the front side of the door and a housing lid 11 that closes the rear portion.
The housing 10 has a thumb-turn through-hole 12 through which the rotation shaft of the thumb-turn is inserted, a cylinder front hole 13 that protrudes from the key hole portion of the cylinder, and a rotation limiting portion 352 of the cylinder on the back side to come into contact with the cylinder to regulate the range in which the key rotates. A positioning portion 15 is provided, and an insertion port 16 through which a key pile of a key is inserted is formed above the cylinder front hole 13.
A through hole 17 formed in the lid 11 of the housing extends an operation interlocking plate 471 for transmitting the rotation of the thumb turn for driving the dead bolt to extend to the external dead bolt driving device, and further, the rotating shaft of the cylinder. And a rear hole 19 for supporting the rotation shaft of the lock plate.

The braking mechanism 2 is located between the thumb-turn rotary cam 41 and the lock plate 31 of the keyhole device, and the checker 21 is alternately fitted into the rotary cam recess 410 and the lower end of the lock plate trough 310 by the vertical movement thereof. Arranged to match,
The checker 21 is slidably disposed vertically through a slit-shaped checker guide 24 provided on the checker seat 20, and is directed upward by the elastic force of the thin plate springs 22 fixed at both ends to the seat 20. Pressed.
When the checker 21 is engaged with the concave portion of the rotary cam at the upper side, the rotation of the rotary cam is prevented, and when the lower end is fitted to the valley of the lock plate, the rotary cam is checked against the elastic force of the thin plate spring 22. Can be pushed down, rotated while rotating the thumb turn to push the upper end of the checker out of the concave portion of the rotating cam, and released from the fitting between the upper end of the checker and the concave portion of the rotating cam so that it can rotate freely.

The keyhole mechanism 3 is positioned relative to the braking mechanism 2, and includes a lock plate shaft pin 30, a number of lock plates 31 equal to the number of key ridges, a plurality of plates 32 interposed between the lock plates, a plate spring 33, A nut 34, a cylinder 35, and a key 36 are provided.
One end of the lock plate shaft pin 30 is supported by the housing 10, the other end is fixed through the cylinder rear hole 19 of the lid 11 of the housing, passes through the lower part of the plurality of lock plates 31 and the plate 32, and the housing The lock plate 31 and the plate 32 are pressed and aligned in the direction of the housing 10 by the elastic force of the nut 34 disposed on the lid side through the plate spring.
An orientation flat 320 is formed on the plate 32 and abuts against the bottom wall surface of the housing 10 so as not to rotate in conjunction with the rotation of the lock plate 31.

There are deep sawtooth troughs 310 and a plurality of shallow sawtooths 311 on the upper periphery of each lock plate 31 facing the checker 21. The valley portion 310 of the sawtooth is for the lower end of the checker 21 to be fitted, and the position where the portion is aligned is the unlock position. The saw tooth 311 is brought into contact with the checker 21 positioned below to suppress the movement of the lock plate 31.
Each lock plate 31 is formed with a lock plate opening 312, and a lock side 313 and an unlock side 314 are formed inside a space formed by the opening.
Each lock plate 31 is supported by a lock plate shaft pin 30 with a plate 32 interposed between the lock plates 31 so as to be independently rotatable, and the key is rotated 90 degrees to the left and right from its center position. The rotation limiting portion 352 contacts the positioning portion 15 of the housing 10 and its rotation is regulated.
Each lock plate is provided with a trough 301 for receiving and dropping the tip of the checker on the outer periphery thereof facing the checker, and the position thereof is determined when the key is rotated to the unlock side (left direction in the sectional view). When the key pile contacts the inside of the lock plate opening and rotates the lock plate, and when the key plate is rotated to the specified rotation position of the cylinder, each lock plate corresponds to the height of the key pile contacted. The position of the trough is determined according to the height of the key crest of the key so that the position of the trough of each lock plate is at a position facing the checker.

The cylinder 35 is inserted through the lock plate openings 312 of the plurality of lock plates 31, and both ends thereof are rotatably supported by the cylinder front hole 13 of the housing 10 and the cylinder hole 18 of the lid 11, respectively.
The cylinder 35 includes a key insertion groove 350, a return cam 351, and a rotation limiting portion 352. The key insertion groove 350 extends to the periphery of the cylinder 35 to form a notched opening so that the key pile of the key can be inserted. .
The key 36 is inserted into the key insertion groove 350, and a plurality of key piles 360 corresponding to the plurality of lock plates 31 are formed in order to perform locking and unlocking operations by rotating the cylinder 35, and these protruding key piles are formed on the housing 10. It passes through the insertion port 16 and is inserted into the cylinder.
The rotation limiting portion 352 of the cylinder 35 abuts on the positioning portion 15 of the housing 10 at a position rotated 90 degrees left and right from the position where the key is inserted, and its rotation is regulated.

The thumb turn mechanism 4 includes a thumb turn 40, a rotating cam 41, a clutch 42, a clutch pin 43, a C-type spring 44, a cover plate 45, a C-type stopper ring 46, and an operation interlocking portion 47.
The thumb turn 40 is rotatably supported by the housing 10 by extending the thumb turn rotating shaft 400 into the housing 10 through the thumb turn through hole 12 at the front of the housing 10.
Also, a thumb turn shaft groove 401 into which the C-type stopper ring 46 is fitted is provided at the end of the thumb turn rotary shaft 400.
The rotating cam 41 is attached to the thumb turn shaft 400 in a rotatable state. The rotating cam 41 has a concave portion 410 on the peripheral surface thereof, and a thumb turn seat 411 and a positioning pin 412 on the rotating cam are arranged on both surfaces thereof. The concave portion 410 of the rotating cam is a concave portion that accommodates the upper end portion of the checker 21, and the fitted state is locked.
The peripheral edges on both sides of the concave portion 410 of the rotating cam are connected to the outer periphery through a gentle curve, and the upper end portion of the checker 21 can be smoothly slid on the peripheral surface of the rotating cam 41 as the rotating cam rotates. In the unlocked state, the lower end of the checker 21 is opposed to the aligned troughs of the lock plate, and the rotating cam pushes down the upper end of the checker 21 so that this peripheral surface can rotate while contacting the upper end of the checker.

A slit-like clutch pin receiving seat 413 is provided on the circumferential side wall of the thumb turn seat 411 on the front surface of the rotary cam, and the clutch 42 is attached through the thumb turn rotary shaft 400 to rotate the thumb turn rotary shaft 400. In conjunction with the rotation, the thumb turn seat 411 rotates. A notch 420 for receiving the clutch pin is provided on the peripheral surface of the clutch 42 together with the clutch pin receiving seat 413, and the clutch pin 43 is accommodated between them to fit the C-shaped spring 44 to the outer periphery of the thumb turn seat 411. Hold the clutch pin pressed. The cover plate 45 is rotatably inserted into the thumb turn rotating shaft 400, covers the opening side of the thumb turn seat 411, and holds the clutch 42, the clutch pin 43 and the C-shaped spring 44 in the thumb turn seat 411.
In this state, the clutch pin 43 is accommodated in the slit-shaped clutch pin receiving seat 413 of the thumb turn seat 411, and the lower half thereof is pressed by the C-type spring 44 and is fitted in the notch 420 of the clutch 42. When 10 rotates, the clutch 42 and the thumb turn seat 411 fitted together with the thumb turn shaft 400 rotate together with the thumb turn shaft 400.
The C-type stopper ring 46 is fitted in the thumb turn shaft groove 401 to hold the rotary cam 41 and the cover plate 45 on the thumb turn rotary shaft 400.
The operation interlocking portion 47 includes the bearing plate 470, the operation interlocking plate 471, and the operation interlocking receiving plate 472, and is rotatably supported by the through hole 17 of the lid 11 of the housing. The bearing plate 470 is rotatably supported at the end portion of the thumb-turn rotary shaft 400, and the operation interlocking plate 471 is extended outwardly through the through-hole 17 of the lid 11 of the housing to advance and retract the dead bolt (in the drawing). Rotational force for transmission (not shown) is transmitted (see FIG. 14).
A convex motion interlocking receiving plate 472 is provided on the outer peripheral surface of the operation interlocking portion 47. When the rotating cam 41 rotates 360 degrees clockwise or counterclockwise, the operation interlocking receiving plate 472 moves to the upper positioning pin 412 of the rotating cam. When the deadbolt is pushed and rotated in the forward and reverse directions, the backward operation of the deadbolt is performed, and the door is locked and unlocked by the advancement and retreat of the deadbolt.

FIG. 5 shows the locked state of the thumb turn.
At this time, the rotation limiting portion 352 of the cylinder 35 contacts the positioning portion 15 of the housing 10, and the return cam 351 of the cylinder pushes and rotates the lock side 314 in the opening 312 of each lock plate 31, so that all the lock plates 31 are rotated. Are aligned at the same angle.
In this state, the trough portions 310 of the lock plate are located at positions on the outer peripheral edges of the lock plates and are disengaged from the lower end of the checker 21, and the checker 21 is pressed upward by the elastic force of the thin plate spring 22. In this state, the upper end of the checker is fitted in the recess 410 of the rotating cam 41 to prevent the rotating cam 41 from rotating.

FIG. 6 shows a state in which the key 36 is rotated 90 degrees clockwise from the state of FIG. 5 (the sectional view of the housing in the center of the figure is a view seen from the back side thereof, so (The direction is the reverse of the figure on the front side of the door.)
The key 36 inserted from the key hole is inserted into the opening 312 of the lock plate 31 along the cylinder 35, and when the key is turned, each key pile 360 of the key rotates by pushing the unlock side 313 of the corresponding lock plate 31. The rotation limiting portion 352 of the cylinder 35 is rotated to a position where the rotation limiting portion 352 contacts the positioning portion 15 of the housing 10.
The peripheral surface of each lock plate 31 facing the checker 21 is provided with a trough for fitting the lower end of the checker, and the position is the rotational position of the cylinder described above, and each lock plate has a corresponding key. Rotating to an angle corresponding to the height of the key ridge, the circumferential trough 310 provided with sawtooth is aligned in a row with respect to the checker 21, and the checker descends to enable fitting to the aligned trough And
This is the unlocking operation of the rotating cam by the key, and the checker 21 can be lowered to the valley of the lock plate.
Next, when the thumb turn 40 is rotated clockwise (note that the rotation is in the opposite direction in the cross-sectional view in the figure), the upper end of the checker 21 slides from the concave portion 410 of the rotating cam 41 through the inclined surface and rotates around the rotating cam 41. The lower end of the checker 21 is pushed into the sawtooth trough 310 and the checker 21 moves to the unlocked position below.
When the thumb turn 40 is further rotated 270 degrees clockwise, the rotary cam 41 connected to the thumb turn rotary shaft 400 is rotated via the clutch 42, and the positioning pin 412 on the back surface of the rotary cam is just at this position. Abuts against the protruding side of

FIG. 7 shows a state where the thumb turn 40 is further rotated to retract the door deadbolt (not shown) to perform the unlocking operation.
When the thumb turn 40 is further rotated 90 degrees clockwise (a total of 360 degrees in combination with the above 270 degrees), the rotating cam 41 is also rotated 90 degrees in conjunction with the thumb turn 40, and at the same time, the positioning pin on the rotating cam of the rotating cam 41 is rotated. 412 pushes the protruding portion of the motion interlocking receiving plate 472 to give a 90-degree rotation clockwise.
The door deadbolt operating mechanism (see FIG. 14) is rotated 90 degrees clockwise through the operation interlocking plate 471 extended to the outside from the lid 11 by the 90-degree rotation of the operation interlocking portion 47, and the door deadbolt is rotated. Retract and perform the unlocking operation.

At this time, the rotary cam 41 is rotated once by the thumb turn 40, the concave portion 410 of the rotary cam is positioned downward, the checker 21 is raised by the repulsive force of the thin plate spring 22, and the upper end of the checker 21 is at the concave portion 410 of the rotary cam. It fits into the recess and its lower end is detached from the sawtooth trough 310.
FIG. 8 shows an operation of setting the thumb turn to the locked state from the state of FIG.
When the key 36 is rotated 90 degrees counterclockwise in this state, the return cam 351 of the cylinder 35 rotates the plurality of lock plates 31 while pushing the lock side 314 in the space in the opening, and is defined by the positioning portion 15. By aligning all the lock plates at the positions, the positions of the valleys on the outer periphery of the drive plates 31 are shifted so that the checker 21 does not enter.
Further, the key 36 returns to its neutral position so that the key pile passes through the insertion port 16 of the key insertion groove 350 and can be extracted.
In this state, the door locking mechanism is unlocked, and the door can be opened and closed by operating the door knob.

FIG. 9 shows an operation for locking the door again from the unlocked state of the door locking device.
First, when the key 36 is inserted into the key insertion groove 350 and rotated 90 degrees clockwise, a plurality of key piles 360 on the key 36 push and rotate the unlock side 313 in the opening of each lock plate 31 to rotate the key pile. The troughs 310 at the periphery of each lock plate 31 are aligned with the checker 21 in a straight line by rotating to an angle corresponding to the height.
In this state, the tip of the checker 21 can enter the valley 310 on the circumferential surface of the aligned lock plate 31 and the checker 21 can slide up and down.
Next, when the thumb turn 40 is rotated in the counterclockwise direction, the valleys 310 on the circumferential surface of each lock plate 31 are aligned in a row at a position facing the checker 21, so that the checker 21 can be moved up and down. The rotating cam 41 rotates and the upper end of the checker 21 slides from the concave portion 410 of the rotating cam 41 through the inclined surface of the rotating cam 41 and presses the checker 21, against the elastic force of the thin plate spring 22. The lower end of the checker 21 is pushed into the trough 310 of the sawtooth.
When the thumb turn 40 is further rotated 270 degrees counterclockwise, the rotating cam rotates via the clutch 42, and the rotating cam positioning pin 412 contacts the opposite side surface of the operation interlocking receiving plate 472.

FIG. 10 shows a state in which the thumb turn 40 is further rotated 90 degrees counterclockwise from the state shown in FIG. 9 (already turned counterclockwise 270 degrees in FIG. 9 to be 360 degrees in total).
The rotation cam 41 rotates 90 degrees counterclockwise together with the thumb turn 40, the positioning pin 412 of the rotation cam 41 pushes the operation interlocking receiving plate 472, and the operation interlocking section 47 also rotates 90 degrees counterclockwise (the cross section is on the opposite side) (In order to see from, it will rotate clockwise.) The operation interlocking plate 471 extended to the outside of the lid 11 of the operation interlocking portion 47 operates the door deadbolt operating mechanism to advance the deadbolt and lock the door.

FIG. 11 shows a state in which the rotary cam 41 is rotated once by the thumb turn 40 and the concave portion 410 of the rotary cam is positioned below with the door locked as described above.
The checker 21 is lifted by the elastic force of the thin plate spring 22 and moves from the unlocked position to the locked position. The upper end of the checker 21 is accommodated in the concave portion 410 of the rotating cam, and the lower end is from the trough 310 of the sawtooth. It has left.
In this state, when the key 36 is rotated 90 degrees counterclockwise, the return cam 351 of the cylinder 35 pushes the unlock side 314 in the opening of each lock plate 31 to return each lock plate 31 to its original neutral position. The key 36 can be extracted from the key insertion groove 350.
In this state, the door is locked, and the door cannot be opened and closed unless the key is used.

12 and 13 show that the security device of the present invention cannot be unlocked by a picking action.
In the locked state, the sawtooth trough 310 on the periphery of each lock plate 31 is in various positions,
The checker 21 has its tip fit in the recess of the recess 411 of the rotating cam 41, and its lower end is in the area of the sawtooth 311 that is out of the valley 301 on the periphery of each lock plate and cannot be lowered.
Therefore, in the locked state of the thumb turn 40, the thumb turn can rotate only up to about 6 degrees of the play range of the checker contained in the recess 41 of the rotary cam 41, and the rotation of the rotary cam 41 is blocked by the checker 21. Therefore, the thumb turn cannot be operated to unlock the door locking device.

In this state, in order to release the thumb turn lock state, even if the lock plate is to be operated, the lock plate 31 has the lower end of the checker 21 in the area of the sawtooth 311 on the periphery of the lock plate, and the lower end of the checker has the sawtooth. Since the rotation is prevented by 311, the lock plate 31 cannot be moved by a tool such as a wire or a driver used for picking.
Alternatively, even if the lock plate 31 can be freely rotated as the raised position where the thumb turn is returned to the neutral position and the tip of the checker is fitted in the recess 411 of the rotating cam, the lock plate can be rotated independently of each other. There is no feeling about the valley 310, and the position where the valley 310 is aligned cannot be found.

In order to avoid an unauthorized unlocking operation, it is necessary to prevent the thumb turn mechanism from being damaged by an excessive load, and it is necessary to be able to lock and unlock the door from the room without using a key.
In the present invention, the clutch interposed between the thumb turn and the rotating cam is for preventing the thumb turn mechanism from being damaged by an excessive load.
The thumb-turn rotary shaft 400, which is the thumb-turn rotary shaft, engages with the clutch 42 and rotates integrally therewith. On the side of the rotary cam 41 opposite to the clutch, the thumb-turn seat 411 that houses the clutch 42 and the clutch pin is provided. The clutch pin housed in the clutch pin receiving groove 413 of the thumb turn seat is pushed into the notch 420 provided on the outer periphery of the clutch by the pressing force of the C-shaped spring 44 fitted on the thumb turn seat 411, and the cover plate 45 is covered with the cover. The rotating cam rotates as the thumb turn rotates.
If an excessive load is applied to force the thumb turn to rotate while the rotary cam is locked as described above, the clutch pin 43 will disengage the clutch of the thumb turn shaft against the pressing force of the C-type spring 44. It is pushed out of the notch and the rotation shaft of the thumb turn is idled in the thumb turn seat 411, and it is possible to prevent excessive force from being applied to the rotating cam.

  Further, in order to perform unlocking / locking operation of the door from the indoor side of the door, the operation interlocking portion 47 for operating the dead bolt of the door can be rotated in a range not contacting the positioning pin 412 of the rotating cam. Provide a knob (not shown) for turning the motion interlocking portion 47 on the inside of the door and turn the knob to the state shown in FIGS. 5 to 8 to open the door by retracting the dead bolt of the door regardless of the rotating cam. The door can be locked by the reverse operation.

The disassembled perspective view of the thumb turn locking device of the present invention (viewed from the front side of the door). The disassembled perspective view (the figure seen from the back side of the door) of the locking device of the thumb turn of this invention. The sectional view of the thumb turn locking device of the present invention. Sectional drawing along the AA line of FIG. When the thumb turn is blocked and locked, the key indicates the neutral position. The key is rotated to the right from the neutral position to align the valleys of the lock plate, the checker can be lowered, the thumb turn is unlocked, and the state is rotated 270 degrees. The thumb turn is further rotated 90 degrees from FIG. 6, the dead bolt is retracted, the checker is returned, and is inserted into the concave portion of the rotating cam. The key is returned to the neutral position from the state of FIG. 7, and the lock plate is aligned to the original position from the state where the troughs are aligned by the return cam of the cylinder. The key is rotated from the neutral position to the right to align the valleys of the lock plate, the checker can be lowered, the thumb turn is unlocked, and the thumb turn is rotated 270 degrees opposite to FIG. The thumb turn is rotated 90 degrees from FIG. 9 to advance the dead bolt. The key is returned to the neutral position from the state of FIG. 10, and the lock plate is aligned to the original position from the state where the troughs are aligned by the return cam of the cylinder. A state in which the rotation of the thumb turn cannot be rotated more than the play of the rotating cam in the locked state by the device of the present invention is shown. Even if the lock plate is operated by picking or the like, the saw tooth on the outer peripheral surface of the lock plate hits the checker and the rotation is prevented, and an excessive load is applied to the thumb turn and the clutch is idling. The perspective view which shows the operation | movement relationship with the deadbolt operated by a thumb turn.

DESCRIPTION OF SYMBOLS 1 Outer shell 10 Housing 11 Housing lid 12 Thumb turn through hole 13 Cylinder front hole 14 Front cylinder receiving seat 15 Positioning part 15 Insertion port 17 Through hole 18 Cylinder hole 19 Lock plate shaft 2 Braking mechanism 20 Checker seat body 21 Checker 22 Thin plate spring 23 screw 24 checker guide 25 spring mounting hole 26 spring working space 3 keyhole mechanism 30 lock plate shaft pin 31 lock plate 310 sawtooth valley 311 sawtooth 312 lock plate opening 313 unlock shaft 314 lock side 32 plate 320 orientation flat 33 plate Shaped spring 34 Nut 35 Cylinder 350 Key insertion groove 351 Return cam 352 Rotation limiting part 36 Key 360 Key mountain 4 Thumb turn mechanism 40 Thumb turn 400 Thumb turn shaft 401 Thumb turn shaft groove 41 Rotation cam 410 times Recessed cam recess 411 Thumb turn seat 412 Rotating cam positioning pin 413 Clutch pin receiving shaft 42 Clutch 420 Notch 43 Clutch pin 44 C-type spring 45 Cover plate 46 C-type stopper ring 47 Operation interlocking portion 470 Coaxial tray 471 Operation interlocking plate 472 Operation Interlocking backing plate
5 Deadbolt

Claims (7)

In the door locking device that moves the dead bolt back and forth by rotating the thumb turn,
A thumb turn mechanism that moves the dead bolt back and forth,
A braking mechanism that prevents and releases the rotation of the thumb turn mechanism,
It consists of a keyhole mechanism that prevents the rotation of the thumb turn mechanism by the braking mechanism by the rotation of the key and enables the opening operation, a housing that stores these mechanisms, and a lid thereof.
The thumb turn mechanism is connected to a mechanism for performing a forward / backward operation of the dead bolt by rotation through a rotating cam that rotates together with the rotation shaft of the thumb turn.
The braking mechanism is configured such that a checker that moves up and down between the rotation cam of the thumb turn mechanism and the keyhole mechanism is urged toward the upper rotation cam by a resilient member, and the rotation cam is located at the ascending position of the checker. The upper part of the checker is inserted into the recess of the block to prevent the rotation, and the rotation is enabled by descending and releasing,
The keyhole mechanism includes a cylinder for inserting and rotating a key, a number of lock plates corresponding to the number of key piles provided with an opening for rotatably accommodating the cylinder in the space,
Both the cylinder and the lock plate are disposed so as to be rotatable around an axis parallel to the rotation axis of the thumb turn mechanism, and the cylinder is rotated in one direction by the key mountain by one-way rotation of the key inserted in the opening of each lock plate. By rotating by pushing, the lock plate is rotated at its rotation end according to the height of the key pile,
With the rotation in the opposite direction of the key, the cylinder pushes the other side inside the opening so that the lock plate is aligned at the rotation end,
By providing a trough that fits the lower end of the checker at a position facing the checker by rotating according to the height of the key ridge on the peripheral surface of each lock plate facing the checker of the braking mechanism,
By rotating the thumb turn by aligning the valleys of each lock plate relative to the checker by rotating the key in one direction, against the elastic force that urges the checker inserted in the recess of the rotating cam. It slides and pushes from the concave portion of the rotating cam toward the circumferential surface of the rotating cam and pushes it into the valley of the lock plate to rotate and allows the dead bolt to move forward and backward.
Further, the thumb turn is rotated so that the concave portion of the rotating cam is located at a position opposite to the checker. Align the plates in the opposite direction to prevent the thumb turn from rotating,
A thumb turn locking device. In the operation interlocking part that performs the advance / retreat operation of the thumb turn mechanism and the dead bolt,
Place the positioning pin on the dead bolt side surface of the rotating cam,
An operation interlocking portion having a rotating shaft that drives the advance and retreat operation of the dead bolt relative to the rotating cam is disposed, and an operation interlocking receiver that receives the rotation by contacting the positioning pin on the rotation surface of the operation interlocking portion. Provide a plate and arrange it so that it is driven forward and backward by the forward and reverse rotation of the thumb turn,
2. The thumb turn locking device according to claim 1, wherein the checker is inserted and returned to the concave portion of the rotating cam at the end point of the forward and reverse rotation of the thumb turn, and is arranged so as to reach the end of the forward and backward operation of the dead bolt. The checker of the braking mechanism is supported by being urged and supported by a leaf spring toward a rotating cam so as to be guided and moved up and down through a slit of a seat provided with a slit. The thumb-turn locking device according to claim 1 or 2. Each lock plate of the keyhole mechanism can be rotated independently by inserting a plate that is prevented from rotating as a spacer between them and being pressed and aligned by a plate spring on the lock plate shaft pin. And
The thumb-turn locking device according to claim 1, wherein the thumb-turn locking device is provided. The cylinder is provided with a return cam that contacts the inner edge of each lock plate toward the rotation side to rotate the inserted key back to the neutral position, and each lock plate rotated by contacting the return cam at the neutral position of the key. Unlocking the valleys and aligning all the lock plates in a line,
A thumb-turn locking device according to claims 1 to 4. The thumb turn mechanism is coupled to the rotary cam via a clutch,
The clutch is provided with a notch for accommodating the lower half of the clutch pin on the clutch peripheral surface fitted to the thumb turn shaft, a thumb turn seat for housing the clutch and the clutch pin on the rotating cam side, and a clutch pin on the thumb turn seat. By providing a clutch pin receiving groove consisting of an opening for storing, storing the clutch pin between them, and fitting the outer periphery with a C-type spring,
The thumb turn and rotating cam can rotate together under the pressing force of the C-type spring, and if the thumb turn receives an excessive load against the pressing force of the C-type spring, the rotating cam is idled. A thumb-turn locking device according to any one of claims 1 to 5. The peripheral surface of the keyhole mechanism facing the checker of each lock plate is formed in an arc shape along the rotation surface of the lock plate, and the peripheral surface is provided with shallow saw teeth together with the troughs, and the lock plate is illegally operated. The thumb turn locking device according to any one of claims 1 to 4, wherein the checker is hooked to prevent the lock plate from rotating.

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