JPH03172473A - Lock - Google Patents

Abstract

PURPOSE:To perform easy and positive automatic locking by providing a latch performing protruding action at two stages and a dead bolt, and performing dead lock operation in association with door closing action. CONSTITUTION:A case 7 for a hotel lock or the like is provided with a dead bolt 9, a latch 27, a trigger 39 and members for operating these. In association with the closing of a door, the latch 27 and trigger 39 in the protruding state recede first, and then the latch 27 starts protruding into the recessed part of a strike on the door frame side. Dislocation is then generated between the latch 27 and trigger 39, so that a latch position holding means formed of a book 35 and an engaging fitting 37 is released, and the latch 27 is further protruded to fasten a dead lock. At the same time, a dead bolt position holding means formed of a hook 13 is released in cooperation with the trigger 39, so that the bolt 9 is protruded to fasten the dead lock. The dead lock can be thereby locked positively only by the door closing action.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a lock, and in particular, the latch is of a two-step protruding type, which exhibits a deadlocking function when the door is closed, and has a separate deadbolt. However, this deadbolt automatically protrudes when the door is closed, thereby exerting a deadlocking function.

(Prior art) For example, in the case of a hotel lock used on a hotel door, etc., when the door is opened, the user enters a designated room, and then closes the door, the latch on the door side is formed into a vertical frame strike. The device was configured so that the door protruded into the recess where the door was located and entered the locked state, automatically locking the door.

(Problem to be Solved by the Invention) However, according to the above-mentioned conventional configuration, the amount of the latch catching on the strike is small, so it cannot be said that the lock is securely locked. In addition to the automatic locking of the latch that can be obtained by operation, a so-called double lock has been proposed in which a deadbolt separate from the latch is projected into another recess formed in the strike by manually rotating the thumb turn from the indoor side. ing. However, it is complicated for hotel users to rotate the thumb turn after entering the room, and if the hotel user neglects to rotate the thumb turn, the hotel will not be able to provide a sufficient crime prevention function.

Therefore, as shown in Japanese Utility Model Application Laid-open No. 58-F32749, it has been considered that the latch is of a two-step protrusion type and the amount of protrusion during deadlocking is increased. However, it still cannot be said to be in a secure locking state, and there has been a demand for improvement.

The present invention has been made based on the above points, and its purpose is to provide a latch with a two-step protruding type that also functions as a deadbolt, and to provide a separate deadbolt. To provide a lock in which a deadbolt is automatically projected and locked when a door is closed.

(Means for Solving the Problems) In order to achieve the above object, the lock according to the present invention is housed in a casing that is incorporated into a door so that it can move in and out of the vertical frame direction, and is retracted into the casing when the door is opened. A deadbolt that is protruded by elastic force when the door is closed and deadlocks by engaging with the indoor side of the vertical frame, and a deadbolt position that is provided inside the housing and holds the deadbolt in a retreated position when the door is opened. and a holding means, which is housed in the housing so as to be retractable in the direction of the vertical frame, protrudes from the housing by an amount A when the door is opened, and is pushed back into the housing by a strike provided on the vertical frame side when the door is closed, and the strike a latch that protrudes along the concave portion by an amount greater than the above-mentioned A for deadlocking; a latch position holding means that is provided within the casing and holds the latch at the position of the protruding amount A when the door is opened; A trigger that is housed so as to be retractable in the direction of the vertical frame, protrudes from the housing when the door is opened, and is pushed back by a strike when the door is closed; and a latch and trigger that are provided inside the housing and are pushed back by the strike when the door is closed. Utilizing the change in the positional relationship between the latch and the trigger that occurs when only the latch protrudes along the concave portion of the strike, the position of the latch is released from being held by the latch position holding means, and the latch protrudes to the extent B. an operating means for allowing the deadbolt to protrude by releasing the deadbolt position holding by the deadbolt position holding means, and a deadlocking position holding of the latch for holding the latch at the position of the protrusion amount B when the door is closed. It is characterized by comprising means.

(Function) First, when the door is opened, the deadbolt is retracted into the housing, and is held at the retracted position by the deadbolt position holding means. The latch is located at a position protruding from the housing in the direction of the vertical frame by a protrusion amount A, and is held in position by latch position holding means. The trigger is in a state of protruding from the housing in the direction of the vertical frame. From this open door state, when the door is closed, that is, when the door is closed,
Above 6- Each member operates as follows.

First, the latch and trigger are pushed back toward the housing by strikes provided on the vertical frame side. At this time, a recess is formed in the strike corresponding to the position of the latch, so that the latch, once pushed back, begins to protrude toward the vertical frame along the recess.

Therefore, a positional deviation occurs between the latch and the trigger, and the operating means functions due to this positional deviation. That is, the action means releases the latch position held by the latch position holding means. Therefore, the latch protrudes by a protrusion amount B in the direction of the vertical frame. As a result, deadlocking by the latch is first applied.

Further, the deadlocking position of this latch is reliably held by the deadlocking position holding means.

The operating means simultaneously releases the deadbolt position holding by the deadbolt position holding means. As a result, the deadbolt projects toward the vertical frame and engages with the indoor side of the vertical frame. This causes deadlocking by the deadbolt.

In other words, by simply closing the door, it is possible to perform not only deadlocking using the latch but also deadlocking using a separately provided deadbolt.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 14.

First, the configuration and operation when the door is closed from the open state will be explained.

FIG. 1 is a plan view showing the hotel lock l according to this embodiment in an open state, and FIG. 2 is a front view. This hotel lock 1 is attached to the door 3 near the vertical frame 5, as shown in FIG.

The structure of the hotel lock will be explained below. First, as shown in FIG. ing. This deadbolt 9 has locking protrusions 9a and 9b at its lower portion, and a locking protrusion 9c at its upper portion.

The locking protrusion 9b engages with a hook (deadbolt position holding means) 13 at a position flush with the front 11, thereby being held in position. The hook 13 is rotatably attached around a shaft 15.

A lever 17 is rotatably attached to the housing 7 at a position away from the vertical frame 5 via a bearing 21 . One end 17a of the lever 17 is in contact with the rear end of the dead bolt 9, and a spring guide 23 is connected to the other end 17b. A compression coil spring 25 is attached to the spring guide 23. The lever 17 is constantly urged to rotate counterclockwise in FIG. 1 around the bearing 21 by the compression coil spring 25.
As a result, the deadbolt 9 is always biased to the left in the figure.

A latch 27 is disposed at the center of the housing 7 on the side of the vertical frame 5 so as to be slidable in the left-right direction in the figure. The latch 27 is fixed to the tip of the latch bolt 109.

The latch 27 also includes a latch holder 31 fixed to the latch bolt 109 and a support member 3 fixed to the housing 7.
2, the compression coil spring 29 is always elastically biased toward the left in the figure. The latch holder 31 is connected to a hook 35 via a shaft 33. Note that the latch holder 31 has a foot portion 31a.

The locking portion 35a of the hook 35 is engaged with a locking metal fitting 37 fixed to the housing 7, and the hook 35 and the locking metal fitting constitute latch position holding means.

This latch position holding means holds the latch 27 at a position 8 mm from the end surface of the front 11 (first stage protrusion position, protrusion amount A) via the latch holder 31.

That is, the latch 27 is biased to the left by the compression coil spring 29, and the latch holder 31 integrated with the latch 27 is also biased to the left.The hook 35 connected to the latch holder 31 is also biased to the left. Forced, but hook 35
The leftward movement of the latch 270 is prevented by the stopper 37, so that the latch 270 is held in the first position described above.

A torsion coil spring 38 is attached to the shaft 33, and the hook 35 is attached to the torsion coil spring 3.
8, it is constantly urged to rotate clockwise in FIG.

A trigger 39 is disposed below the latch 27 so as to be slidable in the left and right directions in the figure.

The L rigger 39 is fixed to the tip of the trigger bolt 40. A stopper 42 is fixed to the trigger bolt 40, and a compression coil spring 41 is stretched between the stopper 42 and a support member 44 fixed to the housing 7. Further, the support member 44 supports the trigger bolt 40 fixed to the housing 7 and forms a spring seat for the compression coil spring 41.

The trigger 39 is constantly urged leftward in the figure by the compression coil spring 41, and its protrusion amount is regulated to a certain amount by the front end surface of the stopper 42 coming into contact with the front 11. . Also, l・
An l-rigger tail 43 is provided at the rear end of the rigger 38.

The hook 13 has a slot 13a formed therein.
By inserting the bin 45 extending from 7 into the slot 13a, the hook 13 is connected to the rotary fitting 47 via the pin 45.
is connected with. The rotating metal fitting 47 is connected to the shaft 15 mentioned above.
It is mounted so that it can rotate around the center. Further, the rotating metal fitting 47 is connected to a deadbolt trigger 51 via an arm 49 and a shaft 50. This deadbolt trigger 51 is attached to the shaft 3 on the latch holder 31 mentioned above.
They are connected via 3. Further, the deadbolt trigger 51 is provided so as to be rotatable around the shaft 33. The rotating metal fitting 47, the arm 49, the deadbolt trigger 51, etc. constitute an operating means. The arm 49 is always biased downward in FIG. 1 by a torsion coil spring 53. The deadbolt trigger 51 is in contact with the trigger tail 43, thereby restricting the movement of the arm 49 in the downward direction in the figure.

Above the latch 27, a latch stopper 55 is attached to the shaft 57.
It is mounted so as to be rotatable around the center, and is constantly biased counterclockwise in the figure by a torsion coil spring 59.

Further, a deadbolt stopper 61 is attached to be rotatable about the shaft 15, and is in contact with the latch stopper 55. Due to the counterclockwise rotation of the latch stopper 55 by the rearward coil spring 59, the deadbolt stopper 61 is biased clockwise in the figure when the latch 27 is in the protruding state, which will be described later.

Note that a solenoid mechanism 63 is housed in the lower part of the housing 7. This solenoid mechanism 63 functions when the door is opened from the outside.

Based on the above mechanism, the operation when closing the door from the open state will be explained.

First, when the door is opened, the door is in a state as shown in FIG.

Door 3 is gradually closed from this state. By closing the door, the latch 27 and trigger 39 are closed, as shown in FIG.
However, it is gradually pushed back by the strike 62 on the vertical frame 5 side.

At that time, four portions of a predetermined depth are formed at the position of the latch 27 of the strike, so that when the latch 27 reaches the recess position, the latch 27 is pushed back at one end.
7 is pushed out by the elastic force of the coil spring 29.

On the other hand, since no such recess is formed at the trigger 39 position of the strike 62, the trigger 39 remains pushed back by the strike, and the latch 27 is pushed out from the trigger 39 by 2 m. state.

In this state, since the deadbolt trigger 51 is in contact with the trigger tail 43, rotation of the deadbolt trigger 51 around the axis 33 is prevented, but the fourth
As shown in the figure, the deadbolt trigger 51 is spaced apart from the trigger tail 43 and can rotate clockwise in the figure about the shaft 33.

By rotating the deadbolt trigger 51, the arm 4
9 moves downward in the figure, and the rotary fitting 47 connected to the arm 49 via the shaft 50 rotates clockwise about the shaft 15.

As a result, the hook 13, which is connected to the rotary fitting 47 via the pin 45, also rotates clockwise in the figure about the shaft 15.

By rotating the hook 13, as shown in FIG.
The engagement between the hook 13 and the locking protrusion 9b of the deadbolt 9 is released. Therefore, as shown in FIG. 5, the deadbolt 9 is pushed to the left in the figure by the biasing force of the compression coil spring 25 via the lever 17, resulting in a deadlocking state.

On the other hand, regarding the latch 27, as shown in FIG. 4, the engaging portion 35a of the hook 35 is pushed upward in the figure by the inclined portion 43a of the trigger tail 43 against the elastic force of the torsion coil spring 38. It will be done. Therefore, when the latch 27 reaches the recess of the strike 62 of the vertical frame 5 and plunges into the recess due to the biasing force of the compression coil spring 29, even if the latch 27 is pushed out to the 8 mm 4fL position in FIG. (first stage protrusion shown in Figure 1),
The hook 35 does not engage with the locking metal fitting 37, and further protrusion is not prevented.

Therefore, the latch 27 is connected to the compressed coil spring 25
It is pushed further leftward in the figure by the elastic force of
As shown in the figure, the foot portion 31a of the latch holder 31 moves to a position where it comes into contact with the front 11. In this state, the latch 27 is located at a position that projects from the front 11 by 15 degrees. (Second stage protrusion of latch 27, protrusion amount B).

By protruding the latch 27 to the second stage, the latch 27
7 also provides a deadlocking condition.

As shown in FIG. 5, the protruding position of the deadbolt 9 to the left in the figure is between the deadbolt stopper 61 and the locking protrusion 9a.
It is held by the engagement of the Further, the position where the latch 27 protrudes to the left in the figure is held by the engagement between the latch stopper 55 and the latch 27. That is, in the states shown in FIGS. 1 and 4, the latch stopper 55 is in sliding contact with the upper surface of the latch 27;
7 reaches the second stage of protrusion as shown in FIG. It will be located at a position facing the end face. Therefore, the latch stopper 55 constitutes a deadlock position holding means for holding the latch 27 in the second protruding position. The counterclockwise rotation of the latch stopper 55 causes the deadbolt stopper 61 to rotate clockwise and engage with the rear end surface of the locking protrusion 9a of the dead bolt stopper 9. Therefore, the deadbolt will also be held in its extended position.

In this manner, when the door is closed, the latch 27 protrudes to the second stage to apply deadlocking, and the separately provided deadbolt 9 automatically protrudes to apply deadlocking.

Next, the structure and operation for opening the door from the indoor side from the closed state will be explained.

First, as shown in FIGS. 3 and 4, lever handles 81 and 83 are attached to the indoor side and the outdoor side.

These lever handles 81, 83 are returned to the non-operating position (horizontal position) by a spring (not shown).

As shown in FIG. 8, an inner core 85 is connected to the lever handle 81 on the indoor side.
By rotating the inner core 85, the inner core 85 rotates.

A rotating metal fitting 87 is connected to the inner core 85, and a lever 89 disposed inside the housing 7 is connected to the rotating metal fitting 87.
(shown in FIG. 7) are connected. Therefore, by rotating the lever handle 81 on the indoor side, the lever 89 is rotated about the bearing 21.

FIG. 6 is a diagram showing the door in a closed state, and FIG. 7 is a diagram showing a state in which parts such as the hook 13, rotating metal fitting 47, and part of the lever 17 have been removed from FIG. 6. In these figures, a 78- pin θ1 is fixed to the tip of the lever 89, and the pin θ1 is provided so as to be able to come into contact with the pressure portion 61a of the deadbolt stopper 61. By the way, a lever 93 is fixed to the lever 89 by three screws 95, so that the lever 93 can be rotated together with the rotation of the lever 89. Further, a pin 97 is integrally provided to protrude from the lever 89, and the pin 97 also rotates.

This pin 97 is engaged with an arcuate slot 98 formed in the lever 17, and is configured such that the pin 97 comes into contact with the end of the slot 98 of the lever 17 when rotated 5 degrees clockwise. has been done. Therefore, when the lever 89 rotates by 5 degrees or more, the rotation is transmitted to the lever 17.

A lever 99 is provided on the shaft 101 provided at the tip of the lever 17 . That is, one end of the lever 99 is connected to the shaft 1.
01 to the lever 17, and the lever 99
The other end is connected via a pin 104 to the edge protrusion 9e of the dead pole l-9. (Note that the tip 17a of the lever 17 is located in the recess defined between the rear end surface 9d of the deadpole l-9 and the edge protrusion 9e, and as described above, the deadbolt 9 is attached to the left by the compression coil spring 25. ) The lever 99 is always urged to rotate counterclockwise in the figure by a torsional recoil spring 109.

A pin 105 protrudes from the lever 89 and is placed in contact with a metal fitting 107 connected to the latch 27 via a latch bolt 109.

Further, the above-mentioned hook 13 is provided with a torsion coil spring 111, so that the hook 13 is biased counterclockwise. An L-shaped metal fitting 113 is provided above the above-mentioned casing 7 and is configured to be able to come into contact with the above-mentioned deadbolt 9.

In the above configuration, when the lever handle 81 on the indoor side is rotated from the closed state shown in FIGS. 6 and 7, the lever 89 rotates clockwise in FIG. 7 about the bearing 21. By this rotation of the lever 89, the pressure portion (31
As a result, the dead bolt stopper 61 rotates counterclockwise in FIG. 7 against the biasing force of the torsion coil spring 59 via the latch stopper 55.

The counterclockwise rotation of the deadbolt stopper 61 causes the latch stopper 55 to rotate clockwise against the biasing force of the torsion coil spring 59 in FIG. The rotation of the deadbolt stopper 61 and latch stopper 55 releases the stopper function for the deadbolt 9 and latch 27, allowing the deadbolt 9 and latch 27 to return to their original positions. This state is shown in FIG.

When the lever 89 rotates 5 degrees from the closed state, the lever 93 rotates as shown in FIG.
rotates, and the pin 97 (seventh
(Figure) also rotates. This pin 87 engages in a slot 98 formed in lever 17 and is 5" in size as described above.
When rotated, the pin 97 comes into contact with the end of the slot 98 of the lever 17. Therefore, the lever 89 is
By rotating by 0 or more, the rotation is transmitted to the lever 17.

When the lever 88 further rotates, the lever 17 rotates clockwise in the figure, as shown in FIG. start.

When the lever 88 rotates further, as shown in FIG. 10, the pin 105 fixed to the lever 89 comes into contact with the metal fitting 107 (FIG. 7) and begins to retract it. The above metal fitting 10
7. Since the latch 27 is connected to the latch 27 via the latch bolt 109, the latch 27 is connected to the compression coil spring 29.
It will be pulled in against the repulsive force of the

When the lever 89 further rotates, the deadbolt 9 and the latch 27 are gradually retracted, and as shown in FIG.
M comes to the protruding position.

In this state, the deadbolt 122-9 is in a fully retracted state, as also shown in the figure. Also, hook 13
is biased counterclockwise in the figure by the torsion coil spring 111, so the locking protrusion 9 of the deadbolt 9
b to maintain the retracted position of the dead pole l-9.

Here, the end of the latch 27 is 6 ml 1 from the front 11.
The reason why the dead bolt 9 is completely retracted at the position where only 1 is protruded will be explained.

In the case of this embodiment, the gap (usually referred to as a vertical gap) between the door 3 and the vertical frame 5 (FIG. 3) is 6 mm.

Assuming that the deadbolt 9 and the latch 27 are pulled into the housing 7 at the same time, they will
If the door is pulled in by a distance of nI11 or less (for example, 5 mm), the door can be opened.

When the door can be opened normally, the door 3 is pushed to open it.

However, when the door is opened in this state and the lever handle 81 is released, the lever handle 81 automatically returns to its original horizontal position due to the elastic force of a spring (not shown). This dead bolt 9 is not fully retracted and the hook 1
If the dead bolt 9 were not held in position by the compression coil spring 25, the dead bolt 9 would protrude again.

Therefore, the above-mentioned inconvenience is prevented by bringing the deadbolt 9 into a completely retracted state immediately before the door can be opened and before the latch 27 is completely retracted.

Now, when the lever 89 is further rotated, the latch 27 is completely retracted via the bottle 105 and the metal fitting 107, as shown in FIG.

Further, the upper locking protrusion 9c of the deadbolt 9 is connected to the housing 7.
Since it comes into contact with the L-shaped metal fitting 113 attached to the side, further retraction is restricted. In this state, the door 3 can be rotated from the indoor side.

When the door is opened, the trigger 39 is pushed out by the compression coil spring 41, as shown in FIG.

Also, when the lever handle 81 on the indoor side returns to its original position,
The lever 89 is returned to a position not shown in FIG. 1 by the coil spring 103 (FIGS. 34-6 and 10). Furthermore, the latch 27 is pushed out by the coil spring 29. At this time, the hook 35 engages with the locking metal fitting 37, so the latch 27
It stops at a position that protrudes 8mm from 1. The above is the door opening operation performed from the indoor side.

Next, a case will be described in which the door is opened from outside the room. In addition to the mechanical components described above, when opening the door from outside, the switch spring 119, the clutch metal fitting 121, the rotating metal fitting 117 having the locking part 127, and the pin 131 function.

First, as shown in FIG. 8, the lever handle 8 on the outdoor side
3 is connected to a rotating metal fitting 117 via an inner core 115. As shown in Figures 13 and 14,
A switch spring 119 is attached to the solenoid portion 63. The clutch metal fitting 121 is attached to be movable up and down between the lever 89 and the lever 93, and a locking portion 129 is formed. Further, the rotary fitting 117 is connected to the lever handle 83 and is rotatably attached by rotating the lever handle 83. A locking portion 127 is formed on the rotating metal fitting 117 and is configured to be engageable with a locking portion 129 of the clutch metal fitting 121 . Further, a pin 131 is provided protruding from the lever θ3, and the pin 131 is configured to be engageable with the switch spring 119.

In the above configuration, if the lever handle 83 on the outdoor side is simply rotated when the door is closed, the rotating metal fitting 117 will simply rotate idly, and the door will not be opened. When opening the door, first, a card representing a key unique to the room is inserted into a part of a card reader (not shown).

When the card is inserted and the status is rOKJ, the solenoid section 63 is energized. By energizing the solenoid section 63, the state shown in FIG. 13 changes to the state shown in FIG. 14. That is, the switch spring 119 moves due to the excitation of the solenoid portion 63, and the clutch metal fitting 121
push upward.

5-26- In this state, when the lever handle 83 on the outdoor side is rotated, the locking part 127 of the rotary fitting 117 engages with the clutch fitting 1.
21 and pushes the clutch fitting 121 to the left in the figure.

This movement of the clutch metal fitting 121 causes the lever 89.
93 rotates, and thereby the door is unlocked by an operation similar to the unlocking operation from the indoor side.

Further, as shown in FIG. 14, as the lever 93 rotates, the pin 131 pushes down the switch spring 119, thereby causing the solenoid section 63 to move to the thirteenth position.
The state returns to the state shown in the figure.

[Effects of the Invention] According to this embodiment, the following effects can be achieved.

First, since the latch 27 is of a two-stage protrusion type and protrudes to a two-stage protrusion position when the door is closed, deadlocking can be performed.

Further, a dead bolt 9 is provided separately from the latch 27, and this dead bolt 1-9 is automatically projected when the door is closed, so that deadlocking can be performed by the dead bolt 9 at the same time as the door is closed.

In this way, the door can be locked by both the latch 27 and the deadbolt 9 by simply closing the door, and the door can be automatically locked by closing the door.
There is no need to forget to lock the lock, and it is also excellent in terms of crime prevention.

Furthermore, the protruding positions of these latches 27 and deadbolts 9 are determined by the deadlock position holding means (latch stopper 5).
5) and the dead bolt stopper 61, the locked state is guaranteed by these.

When opening the door from the indoor side, not only the latch but also the deadbolt 9 can be retracted by simply operating the lever handle 81 on the indoor side. Since the retraction timing of the latch 27 is shifted by a predetermined amount, it is possible to prevent the deadbolt 9 from accidentally protruding after the door is opened.

Further, when opening the door from the outside, for example, a combination of a card reader and a card activates a drive means such as a solenoid to achieve the same operation as opening the door from the inside.

As detailed above, according to the lock according to the present invention, the latch is made to protrude in two steps, and when the door is closed, the latch is made to protrude to the two-step protrusion position to perform deadlocking, and the separately provided deadbolt is automatically extended when the door is closed. Therefore, with the extremely simple operation of simply closing the door, it is possible to provide a double deadlocking state and demonstrate an excellent crime prevention function. .

[Brief explanation of the drawing]

1 to 14 are diagrams showing an embodiment of the present invention, FIG. 1 is a plan view of the hotel lock in the open state, FIG. 2 is a front view of the hotel lock in the open state, and FIG. 3 is a top view of the hotel lock and its vicinity just before closing the door; Figures 4 and 5 are plan views of the hotel lock sequentially showing the unlocking operation when the door is closed; Figure 6 explains the unlocking operation from the inside of the room. Fig. 7 is a plan view of the hotel lock with a portion removed from Fig. 6; Fig. 8 is a sectional view showing the lever handle installed; Fig. 9 to Figure 12 is a plan view of a hotel lock showing the unlocking operation when opening the door from the indoor side, and Figures 13 and 14 are plan views of the hotel lock showing the unlocking operation when opening the door from the outdoor side. be. 1...Hotel lock, 3...Door, 5...Vertical frame, 7...Casing 9...Dead bolt,
13...Hook, 27...Latch, 35.
... Hook, 37 ... Locking metal fitting, 39 ... Trigger 47 ... Rotating metal fitting, 49 ... Arm,
51... Deadbolt trigger 9 0 ward "0 Mound

Claims (1)

[Scope of Claims] It is housed in a casing that is incorporated into the door so that it can move in and out of the vertical frame direction, and when the door is opened, it is retracted into the casing, and when the door is closed, it is protruded by elastic force and engaged with the vertical frame. a deadbolt that performs deadlocking by deadlocking; a deadbolt position holding means provided within the casing for holding the deadbolt in a retracted position when the door is opened; When the door is opened, it protrudes from the casing by an amount A, and when the door is closed, it is pushed back into the casing by the strike provided on the vertical frame side, and along the recessed part of the strike, a portion B larger than the above A is pushed back into the casing.
a latch that protrudes by the length of the latch for deadlocking; a latch position holding means that is provided within the casing and holds the latch at the position of the protrusion amount A when the door is opened; A trigger that is housed in the housing and protrudes from the housing when the door is opened and is pushed back by the strike when the door is closed; and a latch and trigger that are installed inside the housing and are pushed back by the strike when the door is closed, and only the latch is pushed back along the recess of the strike. Utilizing a change in the positional relationship between the latch and the trigger caused by the protrusion, the position of the latch is released from being held by the latch position holding means to allow the latch to protrude by an amount B, and the deadbolt position holding means and a means for holding the latch in a deadlocking position for holding the latch at the position of the protrusion amount B when the door is closed. A lock.