JP2000054703A - Door lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a disadvantage that a latch member projects from a front plate of a lock case on the occasion of opening a door and the door can not be closed consequently and to make the door open only to this side where an operation member is operated or to the other side of the operation, according to the purpose. SOLUTION: A latch member 3 composed of an upper rotating latch 3a and a lower rotating latch 3b is provided in a lock case 5 and, besides, a latch member projecting-withdrawing mechanism X having latch locking-unlocking means 7 and latch withdrawing-holding means 9 is provided in the lock case 5. This latch withdrawing-holding means 9 are constituted of triggers 32 which are so provided for the latch member 3 that sliding contact head parts 35 are brought into pressure contact with a support metal fitting 2 by the resilience of spring members 31 at the time of closing of a door so that the state of the latch member 3 withdrawn in the lock case 5 can be maintained against the resilience of a latch spring 8 on the occasion when the door 4 is opened and of latch projection stoppers 33 which are provided movably for the triggers 32 and engage the latch member 3 withdrawn in the lock case, in linkage with the triggers 32, on the occasion when the door is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lock for a door.
The present invention is particularly applicable to a so-called swing type door in which a door is attached to a door frame of a building so that the door can be opened either indoors or outdoors.

[0002]

2. Description of the Related Art In general, a door mounted on a door frame of a building includes:
It is mounted so that it can be opened either indoors or outdoors. Specifically, there are several partitioned rooms in a building, and a door having a latch member (latch bolt) retracting mechanism is generally provided at the entrance of each room. In this case, the door of each room is attached to the door frame so as to open only to the indoor side where the operator actually operates the lever handle, or to open only to the outdoor side, in consideration of convenience for residents and the like. ing. That is, the door with the latch member retracting mechanism that is generally used is not of the swing type. However, when the door is opened to the outside of the door as in the latter case, there is a case where the door may be hit by a person present at the door. In such a case, there is no particular problem if the person hit by the door is a family member or an acquaintance, but if it is another person, an emotional trouble may occur. Also, when a "wheelchair rider" opens the door to the front, the door is often in the way and it is often difficult to get in and out of the wheelchair.

[0003] Therefore, at present, a place where an unspecified number of people enter and exit, for example, a door attached to a door frame in a room such as a health land or various training places, is opened only to the operator side, so that the above trouble can be solved. There has been a demand for a device to prevent the occurrence of the problem. There is also a demand for the appearance of door locks that are gentle to "people in wheelchairs." At the same time, with this type of door lock, there is a demand for eliminating the inconvenience that the latch member projects from the front plate of the lock case when the door is opened, and as a result, the door cannot be closed. I have.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned demands, and a first object of the present invention is to provide a door only to an operator who operates an operation member when opening a door. Is not open. In addition, considering the convenience of "a person in a wheelchair", when trying to open the door, the door is opened only on the side opposite to the side where the operation member is operated. Next, a second object is to solve the problem that the latch member projects from the front plate of the lock case when the door is opened, and as a result, the door cannot be closed. A third object is to be able to rationally combine the components.

[0005]

In the lock for doors of the present invention, a lock case 5 is provided with a latch member 3 comprising an upper rotation latch 3a and a lower rotation latch 3b, and a latch lock / lock release means is provided in the lock case 5. 7 (7A) and a latch member retracting mechanism X having a latch retracting and holding means 9. The latch retracting and holding means 9 is provided with a latch spring 8 when the door 4 is opened.
Latch member 3 immersed in lock case 5 against the spring force of
The trigger 32 disposed on the latch member 3 such that the sliding contact head 35 is pressed against the receiving metal fitting 2 by the spring force of the spring member 31 when the door is closed so that the state shown in FIG.
And a latch protrusion stopper 33 movably provided on the trigger 32 and locking the latch member 3 retracted into the lock case in conjunction with the trigger 32 when the door is opened. I do.

In the lock for doors of the present invention, a lock member 5 comprising an upper rotation latch 3a and a lower rotation latch 3b is provided in a lock case 5, and a latch lock / lock release means 7 (7A) is provided in the lock case 5. A latch member retracting mechanism X having a latch retracting and holding means 9 is provided, and the latch lock / unlock means 7 (7A) individually allows horizontal rotation of the upper and lower rotating latches 3a, 3b of the latch member 3. Thus, the operation members 6 (6A), 10
(10A) is fixedly provided on the inner and outer operation members 6, 10 so that the door can be opened only on the side on which the (10A) is operated or on the other side of the side on which the (10A) is operated. A plurality of rotating means for rotating and a lock case 5
And the rear end thereof abuts against the distal end cams of these rotating means, and the distal ends 22b and 23b are
The lower and upper latch lock arms 22 (22) respectively engaged with the engagement rear ends 16 of the upper rotation latches 3b, 3a.
A) and 23 (23A).

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to a first embodiment shown in the drawings. In this first embodiment,
Suitable for pulling the door forward. First, FIG. 1 is a schematic explanatory view of an initial (closed) state in which the latch member 3 is inserted into the receiving fitting 2 on the door frame 1 side. As is well known, the receiving fitting 2 includes a troyoke 2a and a strike 2b provided integrally with the troyoke 2a via fixing means.
On the other hand, a lock case 5 is attached to the door 4 side, and a latch member retracting mechanism X interlocked with operation members (knobs, lever handles) 6 and 10 is incorporated in the lock case 5.

In the present invention, basically, a latch lock / lock release means (meaning a component for stopping horizontal rotation of the rotary latch and releasing the stopper) 7 constituting the latch member retracting mechanism X. Latch immersion holding means 9 (for holding the immersion state of the rotating latch, holding the state of the latch member 3 immersed in the lock case 5 against the spring force of the latch spring 8 when the door 4 is opened). Meaning of a component that cancels the holding state.) Therefore, a specific description of each member not directly related to these means 7 and 9 (for example, a spring for returning the operation member 6 to an initial state, a guide for guiding the movement of the latch member 3 and the like) is omitted. .

Next, the latch member 3, the latch receiver 14, and the like will be described. The lock case 5 is provided with a latch member protruding from the front plate 12 similarly to a general lock, but the latch member 3 of the present invention is configured such that the upper and lower rotating latches 3a and 3b having different directions overlap each other. And is integrally provided via a vertical shaft 13. The upper rotation latch 3a and the lower rotation latch 3b constitute the latch member 3 as one set. The latch member 3 retreats against the spring force of the latch spring 8 like a general latch member. The upper and lower rotary latches 3a and 3b are rotatable in opposite directions about the vertical axis 13, respectively.

Here, in order to understand the first embodiment of the present invention, the latch member regulated by the latch member retracting mechanism X will be described. In the first embodiment, when the operation members 6, 10 are operated to open the door 4, only one of the upper and lower rotation latches 3a, 3b is released from the restriction (lock), and therefore the door is not opened. 4 is an operation member 6,
The door opens only on the side where the person who operates 10 is located. For example, referring to FIG. 1, when the operating member 6 is pressed down, the latch lock / lock release means 7 releases the lock of the lower rotation latch 3b, but the lock of the upper rotation latch 3a remains unchanged. Therefore, when the door 4 is pulled to the front side, the lower rotation latch 3b rotates, so that the door 4 opens toward the operator of the operation member 6, but when the door 4 is pushed toward the side, the upper Since the rotation latch 3a does not rotate,
The door 4 does not rotate to the opposite (opposite) side. That is, the first
In this embodiment, the door can be opened only on the side on which the operating members 6 and 10 are operated regardless of whether the room is inside or outside.

With this in mind, the latch member 3 and the latch member retracting mechanism X for the latch member 3 will be described in further detail with further action. In the present invention, for example, when the upper rotary latch 3a is inverted, the lower rotary latch 3b is obtained. As for each member that becomes the same form when inverted as described above, only one member will be described, and the other members will be denoted by the same reference numerals for convenience, and redundant description will be omitted.

FIG. 2 shows the latch member 3, which comprises an upper rotary latch 3a and a lower rotary latch 3b, a latch receiver 14, and a latch spring 8. 3 shows a state where the latch member 3 is viewed from a plane, and FIG. 4 shows a state where the latch member 3 is viewed from a side. FIG. 5 is an exploded perspective view of a main part.

As described above, the upper rotary latch 3a is the same as the lower rotary latch 3b which is integrally assembled in an inverted state. Therefore, the upper rotary latch 3a will be described. Reference numeral 15 denotes an engaging front end engaged with and disengaged from the receiving bracket 2, and the engaging front end 15 slides in contact with the strike 2b of the receiving bracket 2 like a general latch. Directional sliding surface 15a, and a vertical engaging surface 15b that is engaged with the receiving metal fitting 2 when it enters the receiving metal fitting 2.
Reference numeral 16 denotes an engagement rear end extending in a planar triangular shape from the upper end of the engagement front end 15, and an edge of one side of the engagement rear end 16 has a mountain-shaped engagement projection 16a pointing upward. Are formed. Reference numeral 15c denotes a rear end surface of the engagement front end portion 15, and the rear end surface 15c intersects the vertical engagement surface 15b at right angles.

Reference numeral 14 denotes a latch receiver 14 having a U-shaped end face. 2, the latch receiver 14 has a laterally inverted U-shape and just enters a fitting space 17 formed by a combination of the upper rotary latch 3a and the lower rotary latch 3b. Accept the tip.
Therefore, the vertical wall 14a corresponding to the front side of the latch receiver 14 is connected to the upper rotary latch 3a (and the lower rotary latch 3a).
b) Pressing against the rear end face 15c. The latch receiver 14 has a function of returning the rotary latches 3 a and 3 b to a normal state by the spring force of the latch spring 8 and a function of supporting the latch spring 8. The rear end of the latch spring 8 is supported by a latch spring spring support piece 18 fixed to a central portion in the lock case 5 as shown in FIG.

The above-described latch lock / lock release means 7
Are the inner and outer operating members 6, 10 and the inner and outer operating members 6, 10
A plurality of rotating means 2 that rotate in accordance with each rotation of
0, 21, upper and lower latch lock arms 23, 2 which are individually rotated by these rotation means 20, 21, respectively.
And 2.

Referring to FIG. 1, each of these members will be described. Reference numeral 20 denotes first rotating means as a driving plate which is rotated by the inner lever handle 6. The mounting end 20a of the first rotating means 20 is fixedly mounted on an inner operation shaft (for example, an inner handle shaft) 24 as shown in FIG. 6, while the intermediate part is bent twice in the angular direction, and The tip cam portion 20b is in contact with the rear surface of the rear end portion 22a of the lower latch lock arm 22.

On the other hand, reference numeral 21 denotes the outer lever handle 10.
And a second rotating means as a driving plate that rotates.
As shown in FIG. 6, the second rotating means 21 includes a drive plate 26 having a nasal shape fixedly attached to an outer operation shaft (for example, an outer handle shaft) 25, and a movable pin having a rear end portion attached to the drive plate 26. 27, and a portion near the front end portion is constituted by an interlocking plate 29 supported by a fixed shaft 28. The front end cam portion 29a of the interlocking plate 29 is provided at the rear end of the upper latch lock arm 23. 23a is in contact with the back surface.

The lower latch lock arm 2
The upper latch lock arm 2 and the upper latch lock arm 23 are symmetrically disposed in the lock case 5 with respect to the latch spring 8, and the lower latch lock arm 22 is pivotally supported by the lower pivot pin 30 and has a distal end. The part 22b is a lower rotation latch 3b
Engages with the engaging projection 16a (locks the lower rotation latch 3b)
I do. On the other hand, the upper latch lock arm 23 is pivotally supported by the upper pivot pin 30a and has a distal end 23b.
Engages with the engaging projection 16a of the upper rotation latch 3a (locks the upper rotation latch 3a).

Therefore, with reference to FIG. 6, as long as the upper rotary latch 3a is restricted by the upper latch lock arm 23, even if it is pushed toward the door 4 (OUT), the upper rotary latch 3a is rotated in the counterclockwise direction (arrow A). On the other hand, as long as the lower rotary latch 3b is restricted by the lower latch lock arm 22, even if the door 4 is pulled forward (IN), it does not rotate clockwise (arrow B). In other words, the operating member is operated, and from the latch lock arm which rotates in conjunction with the operating member,
Only the rotation latch on the unlocked side rotates. Therefore, when the door is closed, the upper and lower rotary latches 3
a, 3b do not rotate, and make the door 4 a so-called empty lock.

The above-mentioned latch immersion holding means 7 is provided to prevent the latch member 3 from being projected when the door is opened, for example, as shown in FIG. That is, when the operation member 6 is operated to open the door 4 on the front side of the operation, only one of the rotation latches (for example, the lower rotation latch 3b) is horizontally rotated to allow the door to be opened. Once the door is opened, the other rotation latch (for example, the upper rotation latch 3a) that has not horizontally rotated is projected by the spring force of the latch spring 8, so that when the door is closed, its vertical engagement surface 15b is brought into contact with the receiving fitting. It will hit 2. Therefore, the latch member 3 needs to be in a retracted state when the door is opened. Therefore, the latch immersion holding means 7 keeps the latch member 3 retracted when the door is opened.

The latch immersion holding means 9 is disposed in the front of the lock case 5 as shown in FIG. 1, is guided by the front plate 12 of the lock case 5, and has upper and lower latch lock arms 23, 22 are constituted by upper and lower members movably provided at the respective distal end portions 23b and 22b. And each of the upper and lower members is the same form,
In addition, since the upper and lower latch lock arms 23 and 22 are symmetric with respect to the latch member 3, only the upper latch immersion holding means 7 will be described with reference numerals for convenience.

The upper latch immersion holding means 7
Is always urged in a direction protruding from the front plate 12 by a spring force of a spring member 31 in the lock case 5, and a trigger as an operating element provided in the lock case 5, and the reciprocation of the trigger 32 One end 33a is supported by the cam portion of the trigger 32 so as to rotate in conjunction with the movement, and
The central portion is pivotally supported by the lock case 5 via the pivot 34, and the other end portion 33b engages with the slope of the engaging projection 16a of the upper rotary latch 3a.
It is composed of

The shape of the trigger 32 will now be described with reference to FIG. 5. The guide 35 is guided by a horizontal hole 36 formed in the front plate 12, and slides on the strike 2b of the receiving fitting 2 when the door is closed. The sliding contact head 35 is (and pressed), and is formed in a squid ear (triangular) shape when viewed from a plane. Reference numeral 37 denotes a hook-shaped cam portion integrally fixed to the rear end surface of the sliding contact head 35. The above-mentioned latch protrusion stopper 33 is provided on the tapered surface of the cam portion 37.
Is slidably supported at one end 33a.

FIG. 1 shows an initial (closed) state in which the latch member 3 is inserted into the receiving fitting 2 on the door frame 1 side. At this time, the upper and lower latch protrusion stoppers 33 of the latch immersion holding means 9 are
a, 3b are disengaged from the respective engaging projections 16a, 16a.
Therefore, the upper and lower rotation latches 3a and 3b enter the receiving fitting 2 by the spring force of the latch spring 8, and
It is locked to the receiving fitting 2. The upper and lower rotary latches 3a and 3b are provided with upper and lower latch lock arms 23,
The door 4 is locked in the empty state as described above. However, the latch member 3 can retreat (retract) even if rotation is impossible.

FIG. 7 shows a state where the inner handle 6 is operated. In this case, the lower latch lock arm 22 is connected to the first rotating means 2 that rotates clockwise with the inner handle 6.
With 0, it rotates counterclockwise, so that its tip 22a is disengaged from the lower rotary latch 3b. Therefore, since the lock of the lower rotation latch 3b is released, when the inner handle 6 is slightly pulled, the lower rotation latch 3b starts rotating. At the same time, the latch member 3 retracts into the lock case 5 against the spring force of the latch spring 8 as shown in FIG. At this time, the upper and lower latch protrusion stoppers 33 of the latch immersion holding means 9 are in a state as shown in FIG.
That is, when the latch member 3 retreats, the other end portions 33b of the respective latch protrusion stoppers 33 can be engaged with the front slopes of the respective engagement projections 16a of the upper and lower rotation latches 3a, 3b.

Then, as shown in FIG. 10, when the door 4 is further pulled toward the front side (IN), the upper and lower triggers 32 protrude from the receiving fitting 2 and start to protrude from the front plate 12, so that the upper and lower latch protruding stoppers are provided. 33 are respectively scooped up by the cam portion 37 of the trigger 32, as a result, as shown in FIG.
As shown by 1, the upper and lower latch protrusion stoppers 33 are provided with the respective engagement protrusions 1 of the corresponding upper and lower rotation latches 3a, 3b.
6a, 16a. Therefore, the latch member 3 is held in the retracted state by the latch immersion holding means 9. At this time, the orientation of the lower rotation latch 3b returns to the original state. Further, the sliding contact tip 35 of the trigger 32 is in a protruding state.

On the other hand, when closing the door 4, the trigger 3
2 slides on the strike 2b of the receiving fitting 2 and is pushed into the lock case 5, so that the operation mode is the opposite of that described above, and the upper and lower latch protrusion stoppers 33 are provided.
Are disengaged from the engaging projections 16a, 16a of the corresponding upper and lower rotary latches 3a, 3b. At this time, the latch member 3 is inserted into the trowel 2a of the receiving fitting 2 as shown in FIG.

The operation mode described above is based on the operation of the outer operating member 1.
The same applies to the case where 0 is operated. That is, when the outer handle 10 is operated, the distal end portion 23 of the upper / lower latch lock arm 23 is disengaged from the engaging projection 16a of the upper rotary latch 3a via the second rotating means 21, and so on.

[0029]

First, in the first embodiment, the latch lock / unlock means 7 of the latch member retracting mechanism X can be opened only on the side where the operating members 6 and 10 have been operated, regardless of whether indoors or outdoors. In order not to be able to
And the lower and upper latch lock arms 22 and 23 interlocking with these rotating means 20 and 21 are appropriately combined. Depending on the combination, the latch lock / lock release means may be configured so that the door can be opened only on the side where the operation member is operated, regardless of whether it is indoors or outdoors. In this case, the lock for the door includes the structure of the main part of the first embodiment as it is, and the latch lock / unlock means is a so-called "mechanism for pushing the door".

FIGS. 12 and 13 show a lock for a door (second embodiment) having a "mechanism for only pushing the door". This second
The main difference between this embodiment and the first embodiment is that
A, 21A are the operation shafts 2 of the operation members 6A, 10A inside and outside the room.
4A and 25A.

Therefore, referring to FIG.
The latch lock / lock release means 7A is rotated by the operation member 6A on the indoor side (meaning that the operation member 6A is pushed down).
The interlocking plate 29A of the rotating means 21A rotates counterclockwise about the fixed shaft 28A, and as a result, the upper latch lock arm 23A rotates clockwise, and the upper rotary latch 3a becomes rotatable.

On the other hand, when the operation member 10A on the outdoor side corresponding to the opposite side is rotated, the first rotation means 20A rotates clockwise, and as a result, the lower latch lock arm 22A
Rotates counterclockwise, and the lower rotation latch 3a is in a rotatable state.

Therefore, if a person in a wheelchair tries to open the door 4A, the door 4A does not open even if the door 4A is pulled toward the user, but if the door 4A is pushed toward the door 4A, the door 4A opens. It has the advantage of being a door.

[0034]

As is clear from the above description, the present invention has the following effects. (1) When trying to open the door, the door is opened only to the operator who operates the operation member. (2) When the door is to be opened, the door is opened only on the side opposite to the side on which the operating member is operated, so that the convenience of "a person in a wheelchair" can be achieved. (3) The inconvenience that the latch member projects from the front plate of the lock case when the door is opened and the door cannot be closed as a result can be solved. (4) Each component can be rationally combined.

[Brief description of the drawings]

1 to 11 show a first embodiment of the present invention. 12 and 13 show a second embodiment of the present invention.

FIG. 1 is a schematic explanatory diagram.

FIG. 2 is an explanatory view of a latch member, a latch receiver, and a latch spring.

FIG. 3 is a plan view of the latch member as viewed from above.

FIG. 4 is a front view of the latch member as viewed from the side.

FIG. 5 is an exploded perspective view of a main part.

FIG. 6 is an explanatory view of the lock / unlock means of the latch member retracting mechanism as viewed from above.

FIG. 7 is a schematic explanatory diagram when an inner operation member is operated based on FIG. 1;

FIG. 8 is an explanatory diagram viewed from above when the door is started to be pulled toward the user;

FIG. 9 is an explanatory view showing the state of the latch immersion holding means in FIG. 8;

FIG. 10 is an explanatory view seen from above when the door is further opened by pulling the door toward the front side.

FIG. 11 is an explanatory view showing a state of the latch immersion holding means in FIG. 10;

FIG. 12 is a schematic explanatory view of a second embodiment.

FIG. 13 is a view showing a lock member of the latch member retracting mechanism of the second embodiment.
FIG. 7 is an explanatory view of the unlocking means as viewed from above (an explanatory view similar to FIG. 6).

FIG. 14 is a schematic explanatory diagram for explaining an object of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Door frame, 2 ... Receiving bracket, 3 ... Latch member, 3a ... Upper rotation latch, 3b ... Lower rotation latch, X ... Latch member retracting mechanism, 4 ... Door, 5 ... Lock case, 6, 10 ... Operation member,
7: Lock / unlock means, 8: Latch spring, 9: Latch immersion holding means, 11: Latch spring receiver, 12: Front plate, 13: Vertical shaft, 14: Latch receiver, 15: Engagement tip, 15b: Vertical engagement Mating surface, 16 ... engagement rear end, 17
... fitting space, 20 ... first rotating means, 20a ... mounting end, 20b ... tip cam part, 21 ... second rotating means, 22 ...
Lower latch lock arm, 23 Upper latch lock arm, 22a, 23a Rear end, 22b, 23b Front end, 24 Inner operating shaft, 25 Outer operating shaft, 26 Drive plate, 27 Movable pin, 28 ... fixed shaft, 29 ... interlocking plate, 2
9a: tip cam portion, 30: lower pivot pin, 30a: upper pivot pin, 31: spring member, 32: trigger, 33: latch protrusion stopper, 34: pivot, 35: sliding contact head, 3
7 Cam part.

Claims (6)

[Claims] 1. A latch member 3 comprising an upper rotation latch 3a and a lower rotation latch 3b is provided on a lock case 5, and a latch lock / unlock means 7 (7A) and a latch immersion holding means 9 are provided in the lock case 5. Member retracting mechanism X having
And said latch lock / lock release means 7 (7A)
Is operated or operated on the operating member 6 (6A) or 10 (10A) regardless of indoor or outdoor by individually allowing horizontal rotation of the upper and lower rotary latches 3a and 3b of the latch member 3. A plurality of rotating means which are fixedly provided on the inner and outer operating members 6 and 10 and which rotate in response to each rotating operation so that the door can be opened only on the other side of the side; While being pivotally supported by the case 5 and having a rear end portion abutting against the tip end cam portions of these rotating means, the tip end portions 22b and 23b have lower and upper rotation latches 3b and 3a
And a lower and upper latch lock arms 22 (22A) and 23 (23A) respectively engaged with the respective engagement rear ends 16. 2. A lock member 5 comprising an upper rotation latch 3a and a lower rotation latch 3b is provided in a lock case 5, and a latch lock / unlock means 7 (7A) and a latch immersion holding means 9 are provided in the lock case 5. Member retracting mechanism X having
The latch immersion holding means 9 is provided so as to hold the state of the latch member 3 immersed in the lock case 5 against the spring force of the latch spring 8 when the door 4 is opened. A trigger 32 disposed on the latch member 3 such that the sliding contact head 35 is pressed against the receiving metal fitting 2 by the spring force of the hour spring member 31, and a trigger 32 movably provided on the trigger 32 and opens the door. A lock protruding stopper 33 for locking the latch member 3 retracted into the lock case in conjunction with the trigger 32. 3. When the door is closed, it protrudes from the front plate 12 by the spring force of the latch spring 8 so as to engage with the receiving fitting 2,
When the latch member 3 composed of the upper rotation latch 3a and the lower rotation latch 3b and the operation members 6 and 10 inside and outside are operated, the horizontal rotation of the upper and lower rotation latches 3a and 3b of the latch member 3 is individually permitted. And a lock for a door provided with a latch member retracting mechanism X disposed in the lock case 5;
The upper and lower rotation latches 3a, 3b
5 are integrally provided via the vertical shaft 13 so that the vertical engagement surfaces 15b of the latch members 5 are opposite to each other.
So that only the side who operated 0 can open the door
A plurality of rotating means 20 and 21 fixedly provided on the inner and outer operating members 6 and 10 and rotating in accordance with the respective rotating operations; a pivotally supported by the lock case 5; Are in contact with the tip cams of these rotating means 20 and 21, and the tips 22b and 23b
b and 3a, which engage with the respective engagement rear ends 16 respectively.
Latch lock / unlock means 7 comprising upper latch lock arms 22 and 23, and the latch member retracting mechanism X is provided inside the lock case 5 against the spring force of the latch spring 8 when the door 4 is opened. In order to maintain the state of the latch member 3 immersed in the latch member 3, a trigger disposed on the latch member 3 so that the sliding contact head 35 is pressed against the receiving metal fitting 2 by the spring force of the spring member 31 when the door is closed. And a latch protrusion stopper 33 movably provided on the trigger 32 and interlocking with the trigger 32 to lock the latch member 3 retracted into the lock case when the door is opened. A lock for a door, comprising means 9. 4. A squid ear-shaped sliding contact head 35 of the trigger 32 of the latch immersion holding means 9, wherein the squid ear-shaped sliding contact head 35 has one end of a latch protrusion stopper 33. A lock for a door, wherein a hook-shaped cam portion 37 for supporting 33a is continuously provided. 5. An upper and lower trigger 32 provided in a lock case 5 according to claim 3.
One end 33a is supported by the cam portion 37 of each trigger 32, and the central portion is pivotally supported by the lock case 5 via the pivot 34 so that the trigger 33 rotates in conjunction with the advance and retreat of these triggers. A lock for a door, characterized in that the other end 33b comprises upper and lower latch projection stoppers 33 respectively engaged with the engagement projections 16a of the rotary latch 3b (3a). 6. When the door is closed, it protrudes from the front plate 12 by the spring force of the latch spring 8 so as to engage with the receiving fitting 2,
Further, when the latch member 3 including the upper rotation latch 3a and the lower rotation latch 3b and the operation members 6A and 10A inside and outside are operated, the upper and lower rotation latches 3a and 3
b is a door lock provided with a latch member retracting mechanism X disposed in the lock case 5 and individually allowing horizontal rotation of the upper and lower rotation latches 3a and 3b. The vertical engagement surfaces 15b of the portion 15 are integrally provided via the vertical shaft 13 so that they are opposite to each other.
The latch member retracting mechanism X can be operated by the operating member 6 regardless of indoor or outdoor.
A, a plurality of rotating means which are fixedly provided on the inner and outer operating members 6A, 10A, and which rotate in response to the respective rotating operations, so that the door can be opened only on the side where the A, 10A is operated. 21A, 20A and the lock case 5, the rear ends 22a, 23a abut against the tip cams of these rotating means 21A, 20A, and the tips are the lower and upper rotary latches 3b, 3a. Rear end 16 of each engagement
Lower and upper latch lock arms 22 respectively engaged with
A, 23A, latch lock / unlock means 7
A, and the latch member retracting mechanism X can hold the state of the latch member 3 immersed in the lock case 5 against the spring force of the latch spring 8 when the door 4 is opened. A trigger 32 disposed on the latch member 3 such that the sliding contact head 35 is pressed against the receiving member 2 by the spring force of the spring member 31 when the door is closed, and the trigger 32 is movably provided and opened. A lock for a door, comprising a latch immersion holding means 9 comprising a latch protrusion stopper 33 for locking a latch member 3 retracted into a lock case in conjunction with the trigger 32 at the time of a door.