KR200225310Y1 - Double-lock for door - Google Patents

Abstract

The present invention relates to a double lock for the door that can simultaneously release the double locking of the main latch and the auxiliary latch in one-touch manner, the main latch 12 and the main latch (12) for locking the door 10 is not opened arbitrarily open Main latch interlocking means for interlocking each other so as to release the locked state, the auxiliary latch 25 for auxiliary locking of the closed door 10 so as not to be opened from the outside, and the number protruding to the interior side of the door 10. The lock key lever 21 having a lever 23 for operation and a key holder 22 for inserting and operating a unique key exposed to the outdoor side, and fixing the auxiliary latch 25 at its inlet position Auxiliary latch interlocking means that interlocks to interlock the auxiliary latch 25 while the fixing state is released when the locking key lever 21 is operated, and the door 10 is locked by the auxiliary latch 25. Restrain the interior handle 18 Restraining means for prohibiting the operation, and restraining means for releasing the locking state of the auxiliary latch 25 while releasing the restraining means while the entrance door 10 is locked by the auxiliary latch 25; It is easy to use and can easily open the door in the event of an emergency such as a fire, eliminating the risk of a large accident and at the same time without the inconvenience of operation even if the user is carrying heavy luggage or objects. Provide a double lock.

Description

Double lock for door {Double-lock for door}

The present invention relates to a double lock for the door, and more particularly to a double lock for the door that can be released at the same time double-locking of the main latch and the auxiliary latch in one touch.

In general, the double lock for the door is installed in the door to prevent others from invading the room, the conventional double lock for the door is provided with a locking means in the inner space of the door front and rear of the door, that is, the door Rotate the door handles installed on the outdoor and indoor sides to lock the main latches and lock them in the primary, and also operate the key cylinders installed on the front of the door and the lock levers installed on the back of the doors. It has a double latch structure.

However, since the main latch and the auxiliary latch are separately locked in the conventional door double lock, when the door is to be unlocked and the door is opened in the room, first, the locking lever is rotated to release the locking of the auxiliary latch. Then, the door can be opened only by rotating the door handle to unlock the main latch. The unlocking operation of the door is particularly delayed in case of an emergency such as a fire, so that the user does not turn the lock lever in a panic and tries to open the door by continuously rotating the door handle, thereby delaying the opening time of the door. There is a problem that a large accident occurs. In addition, if a user holds a heavy load or a bulky item in the user's hand and wants to unlock the door, the time for opening the door is wasted because the object must be put down, the lever is turned, and the door handle is operated. There was inconvenience in operation.

The present invention is devised to improve the above problems, and provides a double lock for the door that can release the double locking of the main latch and the auxiliary latch at the same time by operating only one of the handle or lever in the room.

1 is a view showing a double lock for the door according to a preferred embodiment of the present invention,

2A to 2D are views illustrating in detail the main parts of FIG. 1;

FIG. 3 is a view showing an operating state of releasing locking of the main latch by operating a handle in an indoor room in FIG. 1;

FIG. 4 is a view showing an operating state of releasing the locking of the main latch by operating a handle in the outdoor in usual times,

FIG. 5 is a view illustrating an operating state of operating a key holder using a key outdoors or using a key to lock a door by rotating a lever to advance an auxiliary latch.

6 is a view showing an operating state of releasing the double locking of the main latch and the secondary latch at the same time by operating only the handle in the room,

FIG. 7 is a view illustrating an operating state of releasing the double locking of the main latch and the auxiliary latch simultaneously by operating only the lever part or the key holder in the room.

<Explanation of symbols for main parts of the drawings>

10 ... Door 11 ... Frame

12 ... Latch 13 ... Latch Rod

14 ... Pulling 15 ... Stopper

17. Interior side handle

18 ... Outdoor handle 19 ... Outdoor pivot

20 ... Interior pivot 21 ... Lock key lever

22 ... key holder 23 ... lever

24 ... clasp

25 ... Auxiliary latch 26 ... Latch mating plate

27 ... first catch 28 ... second catch

29 ... step 30a, 30b ... torsion spring

31 ... the lifting plate 32 ... the first projection

33. 2nd projection 35 ... Guide bar

36 ... restraint 37 ... jamming jaw

38.Rotary lever 39 ... Cam 1

40 ... second cam part 41 ... hinge

43 ... linkage 44 ... load

S1 to S4 ... coil spring

A double lock for the door according to a preferred embodiment of the present invention for achieving the above object is wandering from the door, the main latch for locking so that the door is closed and elastically supported so as to protrude at all times; Main latch interlocking means for interlocking with each other to release the locking state of the main latch according to the manual operation of the indoor handle and the outdoor handle provided at the door; A secondary latch for assisting the door to be retractably supported to lock the door closed by the main latch so as not to be opened from the outside; A lock key lever having a lever portion for manual operation protruding on the indoor side of the door and a key holder for inserting and operating a unique key exposed to the outdoor side; An auxiliary latch interlock means for interlocking the auxiliary latch at its indentation position and interlocking the auxiliary latch to be released when the lock key lever is released; Restraining means for restraining the handle by restraining the outdoor side handle while the door is locked by the auxiliary latch; And restraining release means for releasing the locking state of the auxiliary latch while releasing the restraining means in the state in which the door is locked by the auxiliary latch.

According to the present invention, the main latch interlocking means includes: an indoor side and an outdoor side rotatable body which is supported to be rotatable on the coaxial shaft, respectively, and is connected to each other by inserting the indoor side handle and the outdoor side handle, respectively. It is preferable that a pull piece is provided which is interlocked and pulled to immerse the main latch.

According to the present invention, the auxiliary latch interlocking means is connected to the auxiliary latch and latches the latching plate for advancing or retracting the auxiliary latch in accordance with the rotation operation of the locking key lever, and the auxiliary latch in the protruding state It is preferable that a lifting plate is provided to be elastically supported to prevent the latching plate from being retracted and pushed at the time of rotation of the locking key lever to release the blocking state of the latching plate.

According to the present invention, the restraining means includes: a rotation lever interlocked by the auxiliary latch interlocking means when operating the lock key lever so that the auxiliary latch protrudes, and moved by the interlocking operation of the rotation lever and the outdoor handle. Preferably, a restraining piece is provided to restrain the associated main latch interlocking means.

According to the present invention, the restraining release means includes: a linkage which releases the fixed state of the auxiliary latch linkage means interlocked by the main latch linkage means associated with the interior side handle to fix the auxiliary latch at the inlet position; It is preferred that a hinge body interlocked with the main latch immersed by the main latch interlocking means releases the restrained state of the restraining means and immerses the auxiliary latch.

In addition, the double lock of the present invention preferably comprises a main latch auxiliary interlocking means for interlocking to immerse the main latch by the operation of the locking key lever in the state in which the auxiliary latch is immersed.

Here, the main latch auxiliary interlocking means is pivotally supported on the secondary latch interlocking means, and has one end which can be interlocked in a certain range according to the rotation of the lock key lever, and the other end interlocked with the main latch. It is preferred that the rod is provided with a pivot support point on the auxiliary latch interlocking means so that one end thereof out of the interlocking range of the lock key lever when the auxiliary latch protrudes.

Therefore, when the door is to be unlocked indoors, the double locking of the main latch and the auxiliary latch can be simultaneously released by manipulating only one of the handles or the lever portion without manipulating both the handle and the lever portion, thereby making it easy to use. In case of emergency, such as a fire, the door can be easily opened, eliminating the risk of a large accident, and there is no discomfort in operation even if the user is carrying heavy luggage or objects.

It will be described in detail the configuration of the double lock for the door according to a preferred embodiment of the present invention having such a feature.

As shown in FIG. 1, the double lock for the door according to the preferred embodiment of the present invention is wandering from the door 10, and a main latch for locking the door 10, which is elastically supported so as to protrude at all times, so that the door 10 is not opened arbitrarily. (12); Main latch interlocking means interlocking with each other to release the locked state of the main latch 12 according to the manual operation of the indoor handle 18 and the outdoor handle 17 provided at the door 10; An auxiliary latch 25 rotatably supported by the door 10 to assist in locking the door 10 closed by the main latch 12 so as not to be opened from the outside; A lock key lever 21 having a lever unit 23 for manual operation protruding on the indoor side of the door 10 and a key holder 22 for inserting and operating a unique key exposed to the outdoor side; An auxiliary latch interlock means for interlocking the auxiliary latch 25 at its inlet position and interlocking the auxiliary latch 25 while the fixing state is released when the lock key lever 21 is operated; Restraining means for restraining the manipulating the outdoor side handle 17 while the entrance door 10 is locked by the auxiliary latch 25 and prohibiting its operation; And restraining release means for releasing the locking state of the auxiliary latch 25 while releasing the restraining means in the state in which the door 10 is locked by the auxiliary latch 25.

Prior to describing these components in more detail, the double lock of the present invention includes a frame 11. The frame 11 is embedded in and fixed to an inner space of a conventional entrance door, for example, a steel or wood door, and has an inner space, and takes the shape of a substantially rectangular case in which the inner space is closed. The space includes a main latch interlocking means, an auxiliary latch interlocking means, a restraining means, and a restraining means, which will be described later.

The main latch interlocking means according to the present invention has a bar-shaped latch bar 13 which is integrally coupled with the main latch 12, and is elastically coupled to the latch bar 13 to be described later indoors and outdoors It is provided with the pull piece 14 which interlocks with the side rotating bodies 20 and 19, and pulls out the latch rod 13, and makes the main latch 12 stand out. That is, the pulling piece 14 has a substantially 'C' shape, a stopper 15 provided on the shaft of the latch rod 13, and a coil spring S2 elastically supported by the stopper 15. And elastically supported by the coil spring S1 fixed to one end of the shaft and interlocked with the indoor and outdoor pivoting bodies 20 and 19 which will be described later to move left and right along the axis of the latch rod 13 to thereby latch. It is to pull the rod (13).

As shown in Fig. 2A, the indoor and outdoor rotating bodies 20 and 19 described above have respective indoor and outdoor handles 18 and 17 installed to be rotatable on the indoor and outdoor sides of the door. It is coupled and connectable, and is elastically biased to the coil spring S3 supported on the inner wall of the frame 11 by rotating the indoor and outdoor handles 18 and 17 so as to rotate left and right.

One end of the indoor and outdoor rotating bodies 20 and 19 is preferably protruded to a predetermined length and caught between the pull piece 14 and the stopper 15. That is, the pull piece 14 is moved along the axis of the latch rod 13 by interfering with the rotation of the indoor and outdoor rotating bodies 20 and 19, thereby moving the main latch 12 to the inside of the frame 11. It can be immersed in.

The auxiliary latch interlocking means is connected to the auxiliary latch 25, the latch coupling plate 26 for advancing or retracting in accordance with the rotation operation of the lock key lever 21 to wreak the auxiliary latch 25, and the auxiliary latch (25) is elastically supported to a position that prevents the latching plate 26 from being retracted in a protruding state, and is pushed at the time of rotation of the lock key lever 21 to release the latching state of the latching plate 26. The steel plate 31 is provided. As described above, the lock key lever 21 is integral with the key holder 22 and a key holder 22 through which the key hole is rotatably exposed to the outdoor side of the door. It is formed to have a lever portion 23 protruding to be rotatable on the interior side of the door. In addition, the locking key lever 21 is provided with a latch 24 is fixed to the coaxial between the key holder 22 and the lever portion 23 is located in the inner space of the frame (11). That is, since the clasp 24 is fixedly installed on the coaxial of the key holder 22 and the lever 23, a key (not shown) unique to the outside is rotated by being inserted into the key holder 22. If the lever 23 is rotated by hand in the room, it will rotate in the inner space of the frame 11. Here, it is preferable that the clasp 24 has a shape in which the predetermined length protrudes outward from the annular body.

The latch coupling plate 26 has first and second locking holes 27 and 28 protruding from each other. Accordingly, the latch 24 is caught by the first and second catching holes 27 and 28 as the key holder 22 and the lever unit 23 are rotated, and the latch 24 is continuously rotated. Push the first catch 27 or the second catch 28 in both directions. Therefore, the latch coupling plate 26 is elastically biased to the torsion spring 30a by the pushing force of the latch 24 to be advanced back and forth in the internal space of the frame 11, and the auxiliary latch 25 is latched and engaged. As the plate 26 is moved forward and backward, it will be released from the door 10. In addition, as shown in FIG. 2B, one side of the latch coupling plate 26 is caught by the elevating plate 31 to be described later, thereby preventing the advanced latch coupling plate 26 from being reversed by an external force. Step 29 is formed for this purpose.

In addition, the elevating plate 31 is elastically supported at a position that prevents the latch coupling plate 26 from being retracted in the state in which the auxiliary latch 25 is protruded, and is pushed and latched when the locking key lever 21 rotates. The plate 26 is provided to release the blocked state. That is, the lifting plate 31 is elastically supported by the coil spring (S4) when the latch 24 is pushed forward while the latch 24 is rotated, it is raised by the pressing of the rotating latch 24 In order to prevent the reverse of the latch coupling plate 26 advanced while descending by the elastic restoring force of the coil spring S4. In detail, the lifting plate 31 is formed with a first protruding jaw 32 so that the step 29 of the latch coupling plate 26 is caught on the body, and one end of the linkage 43 to be described later contacts. A second projection step 33 is formed. Accordingly, the elevating plate 31 is in contact with the initial latch 24, and as the latch 24 is rotated, it is simultaneously raised and raised, and the latching plate 26 is rotated by the latch 24. As shown in FIG. When the advancement of the is completed, it is lowered again and the first projection (32) is caught by the step 29 of the latching plate 26 (see Fig. 2b).

The restraining means according to the present invention is to restrain the unlocking of the main latch interlocking means by restraining the rotation of the outdoor handle (17 of FIG. 2A) of the door, and as a component thereof, in the transverse direction in the frame 11 It is provided with a guide bar (35) to be installed, is slidably supported about the axis of the guide bar (35) and is transported along the axis of the guide bar (35) by the rotational movement of the rotation lever (38) to be described later The restraining piece 36 which prevents rotation of the side rotating body 19 is provided.

That is, the restraining piece 36 has a substantially rectangular shape, and a pair of locking jaws 37 which are cam-contacted with the pivoting lever 38 to be described later are formed on the bottom thereof, so that the locking jaws 37 are caught by the locking jaws 37. Receiving an interference force by the rotational movement of the rotation lever 38 is transferred along the axis of the guide bar 35 is in contact with the body of the outdoor rotating body 19. As a result, the outdoor rotating body 19 is disturbed by the restraining piece 36 and its rotation is prevented (see FIGS. 2B and 2C).

The rotation lever 38 as described above has a substantially 'a' shape, and is pinned to the bottom surface of the frame 11 to allow left and right rotational movements, and one end thereof is located at the bottom of the restraint piece 36. The first and second cam portions 39 and 40 are formed in contact with the engaging jaw 37 of the restraining piece 36. Here, the first cam portion 39 is slid to the locking jaw 37 when the rotation lever 38 rotates to push the restraint piece 36. Then, the other end of the rotation lever 38 is located at the bottom of the latching plate 26, and the latching plate 26 is rotated by the latching plate 26 by engaging the bottom surface of the latching plate 26. By rotating forward and backward by the rotating lever 38 is rotated by a predetermined angle (see Figs. 2b and 2c).

The restraint release means according to the present invention is hinged to the bottom surface of the frame 11, elastically supported by the torsion spring (30b) can be rotated left and right around the hinge point, one end is the bottom of the restraint piece (36) The hinge body 41 is positioned in contact with the second cam portion 40 of the rotation lever 38 and is pushed by a linking action when the rotation lever 38 rotates, and the other end is located near the main latch 12. It is provided. That is, the hinge body 41 is interlocked as the other end is pressed by the main latch 12 immersed by the main latch interlocking means so as to rotate the pivoting lever 38, thereby restraining the restraint state of the restraint piece 36. Simultaneously with the release, the secondary latch 25 is immersed (see FIGS. 2C and 2D).

In addition, the restraining release means is pressed in the other end of the hinge body 41 by the main latch 12 which retracts in conjunction with the rotation of the indoor rotating body 20 to rotate in response to the operation of the indoor handle 18. When the restraining piece 36 of the restraining means is transferred to its original position, the cam contact with the rear portion of the indoor rotating body 20 and the indoor rotating body 20 is rotated so that the coil rotates while interfering with each other. It is provided with a linkage 43 for pressing and lifting the lifting plate 31 elastically supported by the spring (S4). In other words, the linkage 43 is interlocked by the main latch linkage means associated with the indoor handle 18 to release the fixed state of the auxiliary latch linkage means for fixing the auxiliary latch 25 in the inlet position. One end has a curved hook shape, and one end thereof is in contact with the second protruding jaw 33 of the elevating plate 31. That is, as the linkage body 43 is rotated, one end portion thereof presses the second protruding jaw 33 to lift the elevating plate 31, and the first protruding jaw 32 is raised while the elevating plate 31 is raised. The latch coupling plate 26 is to be separated from the step 29. Accordingly, the advanced latch coupling plate 26 is elastically biased back to the torsion spring 30a by a linking action with the pivoting lever 38 according to the rotation of the hinge 41.

On the other hand, the double lock of the present invention further comprises a main latch auxiliary interlocking means for interlocking to immerse the main latch 12 by the operation of the locking key lever 21 in the state in which the auxiliary latch 25 is immersed. do. The main latch auxiliary interlocking means has one end which is pivotally supported on the auxiliary latch interlocking means, that is, the latch coupling plate 26, and which can be interlocked in a predetermined range according to the rotation of the lock key lever 21, and the main latch ( 12, the rod 44 is moved to the pivot support point on the auxiliary latch interlocking means so that one end thereof out of the interlocking range of the lock key lever 21 when the auxiliary latch 25 is protruding. ). That is, the rod 44 has a protruding portion 44a which is selectively in contact with the clasp 24 at one end thereof, and the other end thereof has an annular shape and is caught by the pulling piece 14. Accordingly, the rod 44 immerses the main latch 12 into the frame 11 by pushing the pull piece 14 backward while its protruding portion 44a is rotated by interference with the latch.

The operation of the double lock for the door according to the preferred embodiment of the present invention having the configuration as described above will be described in detail.

First, as shown in FIG. 3, when the user wants to open the locked door 10 by operating the handle 18 in the room and reversing the main latch 12, the user views the handle 18. It rotates counterclockwise from the back side of the frame 11 shown in the figure.

Then, the indoor rotating body 20 is elastically supported by the coil spring S3 to be rotated in the same direction as the rotational direction of the handle 18, and one end of the indoor rotating body 20 shows the pulling piece 14. In the A direction shown by the arrow. At this time, the pulling piece 14 moves while compressing the coil spring S1 fixed to the latch rod 13 and the coil spring S2 elastically supported by the stopper 15, and then the former coil spring S1. When the fixed point is reached, the latch rod 13 is pulled in the A direction.

Thereafter, when the user releases the indoor handle 18 held by the user, the indoor rotating body 20 returns to its original position by the elastic restoring force of the coil spring S3, and the indoor rotating body 20 One end of the hanger is caught by the stopper 15.

In addition, as the interlock 43 is rotated as the indoor side rotating body 20 is rotated, the interlocking body 43 rotates while interfering with the rear portion of the indoor side rotating body 20, and one end of the interlocking body 43 is a lifting plate. Pressing the second protruding jaw 33 of 31 raises the elevating plate 31, but since the auxiliary latch 25 is in the reversed state, it does not affect the auxiliary latch 25 at all.

In this way, as the latch rod 13 is pulled, the main latch 12 is retracted into the inner region of the frame 11, and the door 10 is unlocked and can be opened.

As shown in FIG. 4, when the user wants to open the locked door 10 by operating the outdoor handle 17 outdoors and retracting the main latch 12, the user may open the outdoor handle 17. It rotates clockwise from the front side of the frame 11 shown in the figure.

Then, the outdoor rotating body 19 is elastically supported by the coil spring S3 to be rotated in the same direction as the rotational direction of the outdoor handle 17, and one end of the outdoor rotating body 19 is pulled by the pull piece 14. By pulling in the direction A shown by an arrow in the drawing, the main latch 12 is retracted into the inner region of the frame 11 by the above-described operation, and the door 10 is unlocked and can be opened. .

As shown in FIG. 5, a key (not shown) unique to the outside when the outside is operated by inserting the key holder 22, or by rotating the lever 23 in the room to advance the auxiliary latch 25. ), The user first inserts the key into the keyhole of the key holder 22 and turns it counterclockwise in the outdoor, i.e., the front side of the frame 11 shown in the drawing, or indoors, The lever part 23 is turned clockwise in the back side of the frame 11 shown in the figure. Here, the main latch 12 is always in the locked state protruding out of the frame 11.

As such, when the key holder 22 is turned after the key is inserted or the lever 23 is turned, the latch 24 rotates in the same direction as the rotation direction of the key holder 22 or the lever 23. do. At this time, the clasp 24 presses the elevating plate 31, and the elevating plate 31 is lifted upward while being elastically supported by the coil spring S4 by being interfered with the rotation operation of the clasp 24. . At the same time, the latch 24 is caught by the first latch 27 of the latching plate 26 and pushes the first latch 27 in the direction indicated by the arrow in the figure. That is, the door 10 is latched by the latching plate 26 is advanced by the rotation operation of the latch 24, and thereby the secondary latch 25 is locked by protruding to the outside of the frame (11). Here, the elevating plate 31 is raised to the highest point by the length of the protruding portion of the clasp 24 and when it is out of the protruding portion, it is lowered again by the elastic restoring force of the coil spring (S4). At the same time, the step 29 of the latch coupling plate 26, which has been advanced, is caught by the lifting plate 31, that is, the first protrusion 32, which is raised and lowered. Accordingly, even if the latch engagement plate 26 exerts an external force, the stepped jaw 29 is fixed to the first protruding jaw 32 of the elevating plate 31, so that the latch engagement plate 26 is not moved backward.

In addition, when the latch engagement plate 26 advances by the rotation operation of the latch 24, the latch engagement plate 26 pushes the rotation lever 38 hanging on the bottom surface, and the rotation lever 38 It rotates a predetermined angle in the direction C shown by the arrow in the figure. When the rotation lever 38 rotates, the first cam portion 39 of the rotation lever 38 slides on the locking jaw 37 of the restraining piece 36 to press the locking jaw 37. The restraining piece 36 interferes with the first cam portion 39 and moves in the B direction along the guide bar 35. Accordingly, the restraining piece 36 is in contact with the body of the outdoor rotating body 19 to restrain the rotation of the outdoor rotating body 19. At the same time, since the second cam portion 40 of the pivoting lever 38 is in cam contact with one end of the hinge body 41, one end portion of the hinge body 41 is pressed, and the hinge body 41 Supported by the elastic force of the torsion spring (30b) is rotated along the D direction around the hinge point.

Therefore, the other end of the hinge body 41 is located close to the rear of the main latch 12 by a linking action between the pivoting lever 38 and the hinge body 41. Thereby, since the outdoor side rotation body 19 is firmly restrained by the body of the restraint piece 36, it will not rotate even if the outdoor side handle 17 is operated outdoors.

On the other hand, as shown in Figure 6, when both the main latch 12 and the auxiliary latch 25 described above is locked, the main latch 12 and the auxiliary latch ( The double locking of 25) can be released simultaneously.

To describe this operation in more detail, first, the user rotates the interior handle 18 counterclockwise in the rear side shown in the figure. Then, the indoor rotating body 20 is rotated in the same direction as the rotational direction of the indoor handle 18 while being supported by the elastic force of the coil spring S3, and one end of the indoor rotating body 20 is pulled ( 14) in the direction A shown by the arrow in the figure. At this time, the pulling piece 14 moves while compressing the coil springs S1 and S2 fixed to the latch bar 13, and reaches the fixed point of the coil spring S1 to move the latch bar 13 in the same A direction. To be pulled.

Therefore, the main latch 12 is reversed while pushing the other end of the hinge body 41 located in the rear, the hinge 41 is pressed by the main latch 12 to rotate in the opposite direction of the D direction One end of the hinge body 41, which is provided with the elastic force of the torsion spring 30b, pressurizes the second cam portion 40 of the pivot lever 38. That is, the rotation lever 38 is rotated in the opposite direction to the C direction due to the pressing force of the hinge 41, the second cam portion 40 of the rotation lever 38 is the locking jaw ( 37) and the restraining piece 36 is transported in the opposite direction of the B direction along the guide bar 35 by the pressing force of the second cam portion 40 to be spaced apart from the outdoor rotating body 19 so that Release the restraint body 19. At the same time, as the interlocking body 43 rotates as the indoor rotating body 20 rotates, the interlocking body 43 rotates by interfering with the rear part of the indoor rotating body 20, and one end of the interlocking body 43 is a lifting plate. The second protruding jaw 33 of 31 is pressed to raise the lifting plate 31. As the lifting plate 31 ascends, the first protruding jaw 32 is separated from the step 29 of the latching plate 26, and the pivoting lever 38 moves in the opposite direction to the C direction as described above. Because of the rotation, the latch coupling plate 26 is pulled into the frame 11.

Therefore, the auxiliary latch 25 overcomes the elastic force of the torsion spring 30a and is retracted to the inner region of the frame 11. That is, the main latch 12 and the auxiliary latch 25 can release the locking of the door 10 by simultaneously reversing to the inner region of the frame 11.

On the other hand, as described above, the door 18 is not released by manipulating the handle 18 in the room and simultaneously reversing the main latch 12 and the auxiliary latch 25, as shown in FIG. Similarly, the locking of the main latch 12 and the auxiliary latch 25 can be released simultaneously by operating only the lever part 23 on the indoor side.

That is, when the lever 23 is turned clockwise, the latch 24 raises the elevating plate 31, and then pushes the second catching hole 28 of the latching plate 26 to engage the latching plate 26. ) In the direction indicated by the arrow in the figure. Accordingly, the auxiliary latch 25 is reversed to the inner region of the frame 11 to release the locking of the door 10.

Here, as described above with reference to FIG. 6, the first protruding jaw 32 of the elevating plate 31 is separated from the step 29 of the latch engaging plate 26 so that the backward operation of the latch coupling plate 26 is performed. The restraint piece 36 is not disturbed, and the restraint piece 36 is released by the linking action of the pivoting lever 38 and the hinge body 41.

In addition, the user continues to rotate the lever portion 23 clockwise. Accordingly, the clasp 24 which has been rotated is caught by the protrusion 44a of the rod 44, and when the clasp 24 is rotated continuously, the clasp 24 presses one end, that is, the protrusion 44a. The rod 44 is then rotated in the direction indicated by the arrow in the figure.

As such, the other end of the rotating rod 44 presses the pulling piece 14, and the pulling piece 14 is pressed to the other end of the rod 44 and fixed to the latch rod 13. While moving while compressing the coil spring (S2) supported by (S1) and the stopper 15, and reaches the fixed point of the coil spring (S1), the latch rod 13 is pulled in the same A direction. As a result, the main latch 12 is immersed into the inner region of the frame 11 to release the locking of the door 10.

Alternatively, the double locking of the main latch 12 and the auxiliary latch 25 may be released simultaneously by rotating the key holder 22 using the key outdoors. That is, when the key holder 22 is rotated in the clockwise direction, the double locking of the door 10 is released by the operation as described above with reference to FIG. 7.

Therefore, when an emergency situation such as a door is urgently opened or a fire occurs in the room, the locking of the main latch and the auxiliary latch, which are double locked, can be released simultaneously by manipulating only the indoor handle or the lever part.

The present invention has been described with reference to the preferred embodiment shown in the drawings, and those skilled in the art will understand that various modifications are possible therefrom. Accordingly, the true scope of protection of the present invention should be defined by the appended claims.

As described above, the double lock for the door according to a preferred embodiment of the present invention, if you want to unlock the door in the room, by operating only one of the handle or lever unit without operating both the handle and the lever The double locking of the main and secondary latches can be released at the same time, so it is easy to use, and the door can be easily opened in case of an emergency such as a fire, eliminating the risk of large accidents and at the same time the user has a heavy burden Even if you are holding the advantage that there is no inconvenience in operation.

Claims (7)

A main latch 12 which is retractable from the door 10 and locks to prevent the door 10 from being opened arbitrarily by being elastically supported to always protrude; Main latch interlocking means interlocking with each other to release the locked state of the main latch 12 according to the manual operation of the indoor handle 18 and the outdoor handle 17 provided at the door 10; An auxiliary latch 25 rotatably supported by the door 10 to assist in locking the door 10 closed by the main latch 12 so as not to be opened from the outside; A lock key lever 21 having a lever unit 23 for manual operation protruding on the indoor side of the door 10 and a key holder 22 for inserting and operating a unique key exposed to the outdoor side; An auxiliary latch interlock means for interlocking the auxiliary latch 25 at its inlet position and interlocking the auxiliary latch 25 while the fixing state is released when the lock key lever 21 is operated; Restraining means for restraining the manipulating the outdoor side handle 17 while the entrance door 10 is locked by the auxiliary latch 25 and prohibiting its operation; And release means for releasing the locking state of the auxiliary latch 25 while releasing the restraining means in the state in which the door 10 is locked by the auxiliary latch 25. Double lock for door. The method of claim 1, The main latch interlocking means is: An inner side and an outer side rotating body 20 and 19 which are supported to be rotatably coaxially and which are fitted with the interior and outdoor handles 18 and 17 respectively connected, and the rotating body 19 and 20. Double locks for the door, characterized in that the pull piece 14 is interlocked with each other to pull the main latch 12 to immerse. The method of claim 1, The secondary latch linkage means: The latching plate 26 is connected to the auxiliary latch 25 and moves forward or backward according to the rotation operation of the locking key lever 21 to release the auxiliary latch 25, and the auxiliary latch 25 protrudes. The lifting plate 31 which is elastically supported to a position that prevents the latching plate 26 from being retracted in the closed state and is pushed at the time of rotation of the lock key lever 21 to release the blocking state of the latching plate 26 is provided. Double lock for the door, characterized in that provided. The method of claim 1, The restraining means is: When operating the lock key lever 21 so that the auxiliary latch 25 protrudes, it is moved by the interlocking lever 38 interlocked by the auxiliary latch interlocking means, and the pivoting lever 38 moves to the outdoor side. Double lock for the door, characterized in that provided with a restraining piece (36) for restraining the main latch interlocking means associated with the handle (17). The method of claim 1, The means for restraint are: An interlocking body 43 for releasing the fixed state of the auxiliary latch interlocking means for interlocking by the main latch interlocking means associated with the interior side handle 18 to fix the auxiliary latch 25 at the inlet position; The hinge door 41, which is interlocked with the main latch 12 immersed by the latch interlocking means, releases the restraint state of the restraining means and immerses the auxiliary latch 25 at the same time. lock. The method of claim 1, The double lock for the door, characterized in that it comprises a main latch auxiliary interlocking means for interlocking to immerse the main latch 12 by the operation of the locking key lever 21 in the state in which the secondary latch 25 is immersed. . The method of claim 6, The main latch auxiliary interlocking means, It is pivotally supported on the auxiliary latch interlocking means, and has one end which can be interlocked in a certain range according to the rotation of the locking key lever 21, and the other end which is interlocked with the main latch 12, and the auxiliary latch When the protrusion (25) protrudes, the double lock for the door, characterized in that the rod 44 is moved so that the pivot support point on the secondary latch interlocking means so that one end thereof is out of the interlocking range of the locking key lever 21. .