JP3978600B2 - Unlocking mechanism with lever handle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an unlocking mechanism for a lock that can be unlocked even when the door frame is deformed by an earthquake and the dead bolt of the lock is under pressure.
[0002]
[Prior art]
It was devised about 25 years ago and has a panic lock. In this case, the dharma is divided into an outdoor dharma and an indoor dharma, the shaft of the lever handle is separated into the dharma, and when the lever handle is turned from the indoor side, the dead bolt and the latch bolt are always retracted. This is convenient because the door can be opened just by turning the lever handle in an emergency, but it is unlocked if the lever handle is turned from the room to check the locked state, and the lock cannot be confirmed from the room. This is completely different from the present invention. Mainly used for hotel locks.
[0003]
There is also a Japanese Patent Application No. 2002-153344 for which I applied and a lever handle lock mechanism. This is done by turning the lever handle both when the dead bolt is withdrawn and withdrawn.To retract the dead bolt in the locked state and unlock it, unlock the dead bolt with the key lock or thumb turn and then release the lever handle. The dead bolt is retracted by turning, and the lock mechanism is completely different from the present invention.
[0004]
One of the conventional locks is Gremon Tablet. Gremon locks rotate a large lever handle to insert and remove dead bolts and upper and lower bolts, but there are no latch bolts, and they are used for the purpose of fastening doors to soundproof doors. In addition to the completely different purpose of use and mechanism from the present invention, there is no lock to retract the dead bolt by operating the lever handle.
[0005]
[Problems to be solved by the invention]
When an earthquake occurs, the door frame deforms, twists, and when pressure is applied to the door, the pressure concentrates on the dead bolt and latch bolt of the lock. While the latch bolt is not deformed, it concentrates on the dead bolt and the latch bolt. While the latch bolt is not deformed, it is possible to retract the dead bolt while the latch bolt is engaged. However, the strength of the latch bolt is weaker than that of the dead bolt. After the latch bolt is deformed or retracted, the pressure concentrates on one dead bolt and it is impossible to unlock it by turning the key lock or thumb turn knob with your finger. If you turn the key or thumb turn with a pair of pliers, the key will also cut the threaded thumb turn shaft.
To escape from the fire that occurs immediately after the earthquake in this state, you must escape from the room within a few minutes after the earthquake. The above-mentioned lock with panic mechanism and lever handle lock mechanism can be used, but it is a problem to make a lock that allows the dead bolt to be retracted with a lever handle in an emergency, during normal times, locking and unlocking with the same operation as a conventional box lock. .
[0006]
[Means for Solving the Problems]
In normal times, it functions as a conventional box lock, and in order to retract the dead bolt by turning the lever handle only in an emergency, the lever handle and dead bolt are used in an emergency by using the conventional box lock mechanism in the lock case. A connecting bar that interlocks and a connecting lever that moves and disconnects the connecting bar is incorporated.
The connecting bar is movably assembled to the latch cam that receives the lever handle shaft, and the connecting lever is operated to connect the connecting bar to the dharma connecting cam that retracts the dead bolt.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
This will be described with reference to the drawings. First, a conventional box lock mechanism will be described. FIG. 6 shows a conventional box lock mechanism. Locking and unlocking is done by turning the key or thumb turn inserted into the cylinder assembled to the cylinder bearing (48) of the Dharma (46), so that the Dharma dead cam (47) protrudes and retracts the dead bolt (41). The door is opened by assembling the lever handle shaft into the lever handle bearing hole (50) of the latch cam (49) and turning the lever handle so that the latch cam bar (51) retracts the latch bolt (43).
[0008]
The unlocking mechanism of the invention will be described. The perspective view which attached the box lock which provided the unlocking mechanism to the door is FIG. The direction of the connecting lever (5) is a state in which the lever handle (8) and the dead bolt (3) are disconnected. If used in this state, there is no difference from the conventional box lock. FIG. 2 illustrates the mechanism in the lock case in the state of FIG. The movement of the dead bolt (3) and the movement of the latch bolt (4) are not linked. In this state, the dharma (9) has the same function as a conventional box lock in which the dead bolt (3) is taken in and out, and the latch cam (23) is in and out of the latch bolt (4).
FIG. 3 is a diagram in which the connecting cam (17) is rotated by turning the connecting lever (5) with the dead bolt protruding, and the connecting bar (16) is moved to interlock the lever handle and the dead bolt. If the lever handle is turned in this state, the dead bolt and the latch bolt are retracted simultaneously. Since the dead bolt is retracted by rotating the lever handle, it can be retracted with a very large force compared to retracting by turning the key or thumb turn. This lock does not have a function to push the dead bolt by operating the lever handle.
[0009]
FIG. 4 is a view when the lever handle is rotated in the interlocked state of the dharma (9) and the latch cam (23). The lever handle shaft rotates the latch cam (23) and the latch cam bar (25) retracts the latch bolt (4). At the same time, the connecting cam bar (24) of the latch cam pulls the connecting bar (16), and the connecting bar (16) becomes dharma. By pulling the connecting cam (13) and turning the dharma (9), the dartma dead cam (12) retracts the dead bolt.
[0010]
If the lever handle is released after the dead bolt is retracted, the lever handle will return to its home position by the handle spring (21), and the connecting bar (16) will return to its original position by the connecting bar return spring (19). The bar pushes the connecting cam (17) to return to the state of FIG.
If the shape and position of the connecting bar and connecting cam are as shown in the figure, the connecting cam (17) can be automatically recovered. Precautions for manufacturing the automatic recovery mechanism are the combination of the length and shape of the end of the connecting bar, the rear end of the dead bolt, and the shape and size of the end of the connecting lever, and the dead bolt is securely retracted when the lever handle is turned. In order to return to the state shown in FIG. 1 smoothly when the lever handle is released.
[0011]
【The invention's effect】
Adding special features can sometimes be difficult to use. Therefore, in the present invention, the dead bolt is retracted by turning the connecting lever knob and turning the lever handle when necessary. The force with which the dead bolt is retracted with the lever handle can be obtained by turning the lever away from the axis of rotation by 10 cm or more and by turning it with a large handle. The dead bolt can be retracted with a very large force compared to the force of turning the key or thumb-turn knob with your finger. The probability of unlocking even when the door frame is deformed and a large pressure is applied to the dead bolt is very high.
[0012]
The features of the lock using the mechanism of the invention will be described. The feature of the function is that the locking and unlocking at the normal time is performed by turning the key and thumb turn. Although it can be unlocked with the lever handle by turning the connecting lever (5) from the indoor side even during normal times, it is not necessary to retract the dead bolt with a large force during normal times, and there is no need to operate the connecting lever.
When the door and frame are out of order due to an earthquake, etc., and a large pressure is applied to the dead bolt of the locked lock, and when it becomes impossible to unlock without operating with the key or thumb turn, it will unlock from the room side and escape to the outside Operate the connecting lever to retract the dead bolt with the lever handle to unlock. The lever handle is longer than the key and thumb turn from the axis of rotation and is more than 10 centimeters, making it easy to grip. For this reason, it is possible to withdraw more than five times as much force as with a key or thumb turn, and retract the dead bolt under pressure.
[0013]
There are 4 functional features. One is that a connecting cam (13) is provided in the dharma for moving the dead bolt in order to link the dead bolt to the lever handle.
In order to link the lever handle to the dharma, one of them is that the connecting cam bar (24) is provided on the latch cam for assembling the lever handle shaft.
In order to retract the dead bolt with the lever handle, one is that a connecting bar (16) and a connecting cam (17) are provided between the connecting cam bar of the dharma and the connecting cam bar of the latch cam.
The connecting bar (16) is assembled so as to interlock with the connecting cam bar (24) of the latch cam, and the connecting cam (17) is connected to the connecting bar (5) by turning the connecting lever (5) assembled to the connecting cam (17) from the indoor side. 16), the connection bar (16) and the dharma connection cam (13) are connected.
As a result, the latch cam (23) and the dharma (9) are connected by the connecting bar (16), and when the lever handle is turned, the latch bolt and the dead bolt are retracted simultaneously.
The connecting bar (16) is not always connected. Only in an emergency, the connecting lever (5) may be operated to connect the connecting bar (16) to the Dharma connecting cam (13).
For this purpose, it is conceivable to cover the connecting lever (5) with a cover and to operate the connecting lever by breaking or removing the cover when necessary in an emergency.
[Brief description of the drawings]
FIG. 1 is an interior perspective view in which a lock having an unlocking mechanism of the invention is attached to a door.
FIG. 2 shows the state of the lock of FIG. 1 in the AA cross section of FIG. 1, showing the components in the lock case.
FIG. 3 shows a state where the connecting lever is operated in the locked state, and the lever handle and the dead bolt are interlocked.
FIG. 4 shows a state where the lever handle is turned in the interlocked state and the dead bolt is retracted.
FIG. 5 is a view of the lock case in the state of FIG. 2 with a lock case lid.
FIG. 6 is a view for explaining a conventional box lock and is a view corresponding to the same state as FIG. 2;
[Explanation of symbols]
1. Door 2. 2. Lock case / front Dead bolt 4. 4. Latch bolt 5. Connecting lever 6. Connecting lever shaft Thumb turn 8. 8. Lever handle Dharma 10 Cylinder bearing 11. Click spring 12. Dead cam 13. Connecting cam 14. Locking bar 15. Connecting hook 16. Connecting bar 17. Connecting cam 18. Connecting lever bearing 19. Connecting bar return spring 20. Handle spring holder 21. Handle spring 22. Connecting rod 23. Latch cam 24. Connecting cam bar 25. Latch cam bar 26. Lever handle bearing hole 27. Lock case 28. Latch spring 29. Locking pin 30. Cylinder thumb turn assembly groove 31. Lock case lid 40. Lock case front 41. Dead bolt 42. Click spring 43. Latch bolt 44. Locking bar 45. Locking pin 46. Dharma 47. Dead cam 48. Cylinder bearing 49. Latch cam 50. Lever handle bearing hole 51. Latch cam bar 52. Handle spring 53. Lock case 54. Latch spring

Claims (1)

      The lock case (27) has a dead bolt (3) and a latch bolt (4), a cylinder or thumb turn (7) is assembled to the dharma (9) to move the dead bolt, and the dead bolt is inserted into the thumb turn or cylinder. The lever handle (8) as a handle is assembled to the latch cam (23) for moving the latch bolt while the lock key is turned, and the latch bolt is pulled in addition to the box lock structure that is turned by turning the lever handle. ) Is provided with a connecting cam (13), a latch cam (23) is provided with a connecting cam bar (24), and the connecting cam bar (24) is connected to a connecting bar (16) via a connecting rod (22) and a handle spring holder (20). Operational connection that connects and disconnects connection bar (16) and connection cam (13) of dharma (9) while assembling And a connection lever (5) for operating the operation connection cam (17). The connection lever (5) is operated to connect the connection bar (16) to the dharma (9). When the lever is connected to the connecting cam (13), the latch bolt (4) and the dead bolt (3) are retracted simultaneously only by turning the lever handle (8).

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