JPH07113366A - Door lock - Google Patents

Abstract

PURPOSE:To improve reliability and to reduce cost by providing a changing means to change over an engagement position of an emergency key and a guest key for a dead hub so that a sinking action of a latch bolt is caused when the guest key inserted into a cylinder is turned. CONSTITUTION:A hole fitting part 61b of a thumb-turn assembly 60 is fit in a turning central hole 24d of a dead hub 24 to push in and out a dead bolt 2 and a latch bolt 4. In the meantime, a cylinder tail 58 of a cylinder 10 is inserted into the turning central hole 24d against this hole fitting part 61b and assembled. Thereafter, a longitudinal groove 61C to fit the tail 58 at the time of using a key 9 is provided on the side of the hole fitting part 61b so that a sinking action of the latch bolt 4 is caused by the guest key 9 in an operation range alpha1 from an insertion position alpha0 causing a sinking action of the dead bolt 2 by an emergency key 8. Consequently, it is possible to improve reliability and unlocking workability and to reduce manufacturing cost less expensive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock equipped on a door of a guest room of a hotel, for example.

[0002]

2. Description of the Related Art As a door lock as described above, there is a type provided with a latch bolt that is unlocked from the indoor side by operating a knob and from the outdoor side by operating a key. In addition to such a latch bolt, a door lock of a type further provided with a dead bolt that is locked by an operation of a thumb turn from the inside of the room is also used.

First, regarding an example of such a door lock,
This will be described with reference to FIGS. 2, 4, 6, 7 and 8 which are explanatory views of the present invention. As shown in FIG. 2, this door lock sandwiches a lock 5 embedded in the door 1 and inserts a thumb turn 6 inside the door.
While the door inside knob 7 is provided, the cylinder 10 is provided outside the door.

As shown in FIG. 6, inside the lock 5, a dead hub 24 is provided at an upper right position in the figure, and the dead hub 24 is at a position shown in the drawing (hereinafter, this position is referred to as a first rotational angle position θ ₁ ). ), The dead bolt 2 and the latch bolt 4 are held in a protruding state. Then, the dead hub 24 is moved from the first rotation angle position θ ₁ to
The position shown in FIG. 7 (hereinafter, this position will be referred to as the second rotation angle position θ).
₂ ), the dead bolt 2 slides into the lock 5.

Further, when the dead hub 24 is rotated counterclockwise by about 45 ° from the second rotational angle position θ ₂ to the position shown in FIG. 8 (hereinafter, this position is referred to as the third rotational angle position θ ₃ ), The latch bolt 4 slides via the latch actuating lever 37, and the latch bolt 4 also sinks into the lock 5. Thereby, the door 1 can be opened.

As shown in FIG. 4A, the cylinder 10 for causing the above-described pivoting operation of the dead hub 24 by the key operation from the outdoor side is a cylinder tail made of a flat plate protruding rearward. 58 is provided. This cylinder tail 58 is shown in FIG.
As shown by the two-dot chain line, it is configured to be able to move in the axial direction by a predetermined distance L and to be integrally rotated by a key operation.

The cylinder 10 having the above structure is shown in FIG.
As shown in (a), the cylinder tail 58 is assembled by being inserted into the rotation center hole 24d of the dead hub 24 halfway. On the other hand, the thumb turn assembly 7 having the thumb turn 6 is provided inside the door of the rotation center hole 24d.
0 is assembled with its rear end abutting the cylinder tail 58.

The conventional thumb turn assembly 70 described above is
As shown in FIG. 19B, a thumb turn barrel 71 integrally extending from a rear end portion of the thumb turn 6 is configured to penetrate a thumb turn body 72. In addition, a thumb turn joint 73 extending rearward in the axial center position is provided inside the thumb turn barrel 71, and the thumb turn joint 73 is held by a joint spring 74 with its rear end portion protruding from the thumb turn barrel 71. There is. Then, as shown in FIG. 19A, the protruding end portion is formed as a hole fitting portion 73a having a cross-shaped cross section.

The rotation center hole 24d of the dead hub 24
Is formed in a substantially 8-shape, as shown in FIG. 18 (b). The hole fitting portion 73a of the thumb turn assembly 70 is fitted into the rotation center hole 24d having such a shape from the inside of the door to a middle portion.

On the other hand, the cylinder tail 58, which is inserted into the rotation center hole 24d from the outside of the door, has a dead hub 2
4 is the first rotation angle position θ ₁ and the second rotation angle position θ ₂
It is located in a play space 24e with respect to the cylinder tail 58 in the rotation center hole 24d during the rotation between and. Accordingly, when the dead hub 24 is rotated by the thumb turn 6 between the first rotation angle position θ ₁ and the second rotation angle position θ ₂ , that is, when the dead bolt 2 is retracted and retracted, the cylinder tail 58 is moved to the dead hub. It is held stationary without engaging 24. For this reason, the direction of the key insertion hole into the cylinder 10 is always held in the vertical direction regardless of the state in which the dead bolt 2 appears or disappears.

As the keys to be inserted into the cylinder 10, two types having different insertion lengths are prepared. One of the keys is an emergency key 8 that can be opened from the outside of the door even in a locked state with the dead bolt 2 in an emergency.
18 (a) shows the state in which the cylinder tail 58 is inserted in the vertical direction as shown in FIG. 18 (b) (hereinafter, this position is referred to as the insertion position α ₀ ). Therefore, when rotating to the left, there is no play in the direction of rotation. Therefore, by rotating the key 8 counterclockwise over a range of 90 ° (hereinafter, this range is referred to as a first rotation operation range α ₁ ), the dead hub 24 moves from the above-described first rotation angle position θ ₁ to the second rotation angle position θ ₁ . Rotate to the rotation angle position θ ₂ . Then, the dead hub 24 is moved to the third rotation angle position θ ₃ by further rotating the key 8 counterclockwise from the above over a range of about 45 ° (hereinafter, this range is referred to as a second rotation operation range α ₂ ). When the door 1 is rotated, the dead bolt 2 and the latch bolt 4 are retracted so that the door 1 can be opened from the outside.

On the other hand, a key having a longer insertion length into the cylinder 10 than the emergency key 8 is handed to the guest who uses the guest room as the guest key 9. This key 9
18C shows that the cylinder tail 58 is inserted into the cylinder 10. At this time, the cylinder tail 58 is pushed by the guest key 9 and moves to the thumb turn assembly 270 side, whereby the hole fitting is performed. The joining portion 273a is pushed out from the rotation center hole 24d of the dead hub 24.

The dead hub 24 at this time is shown in FIG.
As shown in FIG. 8 (d), it is at the second rotation angle position θ ₂ . That is, when going out, the dead bolt 2 is unlocked by the thumb turn 6, the latch bolt 4 is unlocked by the door inside knob 7, the door 1 is opened, and the door 1 is closed from the outside of the room. It is locked. Therefore,
In this state, the cylinder tail 58 has a play of 90 ° in the counterclockwise rotation direction thereof. Therefore, the guest key 9 is _first over the play range, that is, the first rotation operation range α _1. It is necessary to spin the wheel. Thus, relative engagement positional relation of the cylinder tail 58 is the same as the state shown in FIG. 18 (b) for Deddohabu 24, then further 45 ° for the first time by rotating a second rotational angle position in Deddohabu 24 theta ₂ From the third
A rotational movement to the rotational angular position θ ₃ occurs. As a result, the latch bolt 4 is retracted as described above, and the door 1 can be opened.

[0014]

However, in the above-mentioned conventional structure, when the guest key 9 is used to open the door, it is necessary to idle the key 9 until the rotation angle exceeds 90 °. Since the response of the unlocking operation is not felt at all, the guest key 9 handed from the hotel side is not a key suitable for the cylinder 10, or the cylinder 10 is erroneously judged to be broken. Therefore, there is a problem that it is easy for customers to feel distrust of door locks and the like. Also, 90
If the key 9 is to be rotated more than °, it is necessary to change the gripping state of the key 9 with the fingertip during the operation, which causes a problem that good unlocking operability cannot be obtained. .

The direction of rotation of the guest key 9 is determined by the opening / closing direction of the door, and does not rotate in the opposite direction. However, in general, most guests using hotels do not know in advance which way to turn the key. Therefore, when the guest key 9 is inserted, the guest key 9 is temporarily rotated in either the left or right direction. It is normal to try turning. Then, if it is not turned, the operation is performed in two steps, such as turning in the opposite direction. This causes a problem that the unlocking operability is deteriorated.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to improve the unlocking operability performed by, for example, a hotel guest, thereby improving the reliability. And to provide a door lock that can be made more inexpensive.

[0017]

In order to achieve the above object, a door lock according to claim 1 of the present invention comprises a dead bolt and a latch bolt, and a rotatable dead hub for retracting and retracting them. A door lock in which a thumb turn assembly having a hole fitting portion that fits into the rotation center hole of the dead hub is assembled from the inside of the door and the cylinder is assembled from the outside of the rotation center hole. Then, when the emergency key is inserted into the cylinder in a state where both the dead bolt and the latch bolt are protruding, the dead key is rotated by the rotation operation of the emergency key from the insertion position to the first rotation operation range. After the immersing operation occurs, the immersing operation of the latch bolt occurs by the rotating operation up to the second rotating operation range following the first rotating operation range, while When the guest key is inserted into the cylinder in a state where the latch bolt is protruding and the latch bolt is protruding, the latch hub is inserted into the cylinder so that the rotating operation from the insertion position to the first rotation operation range causes the latch bolt to retract. It is characterized in that an engagement changing means for switching the engagement position relationship between the emergency key and the guest key is provided.

A door lock according to a second aspect of the present invention includes a dead bolt, a latch bolt, and a dead hub, and the dead hub is moved from the first rotation angle position corresponding to the protruding state of both bolts to the second rotation angle position.
When the dead bolt is moved into the rotation angle position, the dead bolt is retracted, and when the dead hub is rotated from the second rotation angle position to the third rotation angle position, the latch bolt is retracted, and the door. A thumb turn assembly that is provided inside and has a hole fitting portion that fits in the rotation center hole of the dead hub at the inner end, and is inserted into the rotation center hole facing the hole fitting portion from the outside of the door. And a cylinder having a plate-shaped cylinder tail at the inner end, and the rotation center hole is the second rotation of the dead hub when the hole fitting portion is rotated from the inside of the door to project the dead bolt. It is formed in a shape having a play space for the cylinder tail so that the cylinder tail is held in an immovable state at the time of the rotation operation from the angular position to the first rotation angular position,
When the emergency key is inserted into the cylinder and rotated when the dead hub is located at the first rotation angle position, the cylinder tail engages with the rotation center hole and the dead hub is rotated from the first rotation angle position to the second rotation position. A door lock that rotates from an angular position to a third rotational angular position,
When the dead hub is located at the second rotation angle position, by inserting a guest key having a longer cylinder insertion length than the emergency key into the cylinder, the tip end of the cylinder tail pushed toward the thumb turn side is fitted and engaged. The engagement groove is formed on the hole fitting portion side as engagement changing means for switching the engagement position relationship between the emergency key and the guest key with respect to the dead hub.

According to a third aspect of the present invention, in the door lock according to the first aspect, when the guest key is inserted into the cylinder in a state in which the dead bolt is depressed and the latch bolt is projected, the first key is inserted from the insertion position. The present invention is characterized in that a latch bolt immersing assisting means is provided for causing the latch bolt to immerse even when a rotating operation is performed in a direction opposite to the rotating operation range.

[0020]

In the door lock according to the above-mentioned claim 1, for example, when a guest of the hotel returns from the place where he / she is going to open the door with the guest key, when the guest key inserted in the cylinder is rotated, the door lock is immediately released. Then, the immersing operation of the latch bolt occurs. Therefore, the guest key handed to the guest from the hotel side is not a key that fits the cylinder, or the cylinder is broken, and the user does not feel distrust of the door lock. Since it is not necessary to change the grip state with the fingertips on the way, reliability is improved and unlocking operability is improved.

In the door lock according to the present invention, when the dead key is located at the second rotation angle position, that is, when the guest key is inserted into the cylinder when only the latch bolt is locked, the guest key causes the thumb turn side. The tip end portion of the cylinder tail pushed by is fitted into the engaging groove on the hole fitting portion side. Therefore, when the guest key is rotated in this state, the dead hub rotates via the hole fitting portion. As a result, the dead hub immediately rotates from the second rotation angle position to the third rotation angle position, and the latch bolt is retracted to open the door. For this reason,
Similar to the above, reliability is improved and unlocking operability is improved.

In the above structure, the above-described operation can be obtained by changing only the structure of the thumb turn assembly side, and the lock, the cylinder and the keys can have the same specifications as before. Therefore, it is possible to minimize the modification cost and the replacement work particularly when the existing door lock is made to have the above-mentioned operation specifications, and thus the overall manufacturing cost can be further reduced.

In the door lock according to the third aspect of the present invention, no matter which direction the guest key inserted into the cylinder is rotated, the latch bolt is immediately retracted. Therefore, in addition to the same effect as the door lock according to the first aspect, the user does not hesitate in which direction the key should be rotated, and the unlocking operability is further improved.

[0024]

【Example】

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

As shown in FIG. 2, the door 1 has an end face 1
A lock 5 having a dead bolt 2 and a trigger bolt 3 and a latch bolt 4 which can be retracted and retracted through a,
It is buried from the end surface 1a side of the door 1. A thumb turn 6 and a door inner knob 7 are provided on the inner side of the door (left side in the figure) with the lock 5 interposed therebetween, and a key 8 described later is provided on the outer side of the door.
・ Cylinder 10 into which 9 is inserted and door outer knob 11
And are installed.

The door outer knob 11 functions only as a grip portion when the door 1 is opened / closed from the outside of the room, and is fixed to the door 1. On the other hand, the door inside knob 7 has a structure capable of rotating the grip portion, and a meniscus 35 described later for transmitting the rotation of the grip portion to the lock 5 is provided inside. ing.

First, the structure of the lock 5 will be described. As shown in FIG. 3, the lock 5 has a rectangular plate-shaped front 2 which is fixed to the end surface 1a of the door 1 so as to overlap each other.
1 and a front reinforcing plate 22 are provided. The front reinforcing plate 22 has a box-shaped case 23 located inside the door 1.
The dead bolt 2, the trigger bolt 3, and the latch bolt 4 are inserted into and retracted from the upper side of the case 23 through the openings of the front 21 and the front reinforcing plate 22, respectively, that is, In the figure,
They are arranged so as to be slidable in the left-right direction.

On the right end side of the dead bolt 2, there is formed a recess 2a which is recessed downward in a substantially U-shape from the upper surface thereof. A dead hub 24 is rotatably arranged slightly above the recess 2a. This dead hub 2
4 has a cylindrical rotation support portion 24a at the center thereof,
Further, a dead bolt drive portion 24b extending diagonally downward to the right in the figure is provided below the rotation support portion 24a so as to be fitted into the recess 2a of the dead bolt 2. On the other hand, a latch actuating lever drive unit 24c extends in the upper left direction facing the deadbolt drive unit 24b.

A rotation center hole 24d is formed at the center of the rotation support portion 24a so as to penetrate in the direction perpendicular to the plane of the drawing. The rotation center hole 24d has a shape of a substantially eight shape,
More specifically, when the cross-shaped groove is formed, of the four fan-shaped portions defined by the cross-shaped groove, the two fan-shaped portions at the central point symmetrical positions are deleted.

The deadbolt driving portion 24b is fitted in the recess 2a of the deadbolt 2 in a diagonally right downward direction as shown in the figure (hereinafter, the dead hub 24 in this state).
(The rotation position is referred to as the second rotation angle position θ ₂ ), the dead bolt 2 is held at the retracted position where the end face of the head 2b on the left end side thereof is substantially flush with the face of the front 21, that is, the unlocked position. To be done. Then, when the dead hub 24 is rotated clockwise by 90 ° from the position shown in the drawing, the dead bolt 2 is pushed leftward by the dead bolt driving portion 24b fitted in the recess 2a, and the head 2b moves toward the front 21. It is switched to and locked at the locking position that protrudes from it (see FIG. 6, hereinafter, the rotational position of the dead hub 24 at this time is referred to as the first rotational angular position θ ₁ ).

In order to hold the dead bolt 2 at the switching positions between the unlocked position and the locked position as described above, a dead spring 25 made of a torsion coil spring is provided between the dead bolt 2 and the case 23. It is provided.

On the other hand, as shown in FIG.
On the right side of the dead hub receiver 27 urged downward by a hub receiver spring 26 composed of a compression coil spring.
Is provided so as to be slidable upward from the position shown in the figure. The dead hub 24 can be further rotated counterclockwise from the unlocked position shown in the figure. At this time, the deadbolt drive portion 24b that separates from the recess 2a pushes up the dead hub receiver 27 from the lower side, and the deadhub drive portion 24b moves toward the deadbolt drive portion 24b as shown in FIG.
Turns to the right and becomes nearly horizontal (hereinafter, the rotation position of the dead hub 24 at this time is referred to as a third rotation angle position θ ₃ ).

As shown in FIG. 3, the latch bolt 4 is formed by connecting a shaft portion 4b to the right side of a head portion 4a protruding and retracting through the front 21. On the other hand, the case 23 is provided with a support plate 31 in an upright state.
The pushed portion 4c is connected to the right end side of the shaft portion 4b penetrating the shaft 1. Further, the shaft portion 4b has a head portion 4
A stepped spring receiving surface 4d is formed with the diameter on the a side being large, and a latch spring 32 formed of a compression coil spring is compressed between the spring receiving surface 4d and the support plate 31. By the spring force of the latch spring 32,
The head 4a of the latch bolt 4 is projected from the front 21, and the pushed portion 4c is held at the latch locking position where it abuts the support plate 31 from the right side.

A retractor 33 which is slidable in the left-right direction is provided below the latch bolt 4, and a latch cam 34 is rotatably provided at the right end side of the retractor 33. . A half-moon hole is formed in the latch cam 34, and a half-moon plate 35 extending from the door inside knob 7 is fitted and inserted into the hole so that a rotation operation integral with the door inside knob 7 is generated. There is.

On the other hand, the retractor 33 is provided with a retractor spring 36 which is a compression coil spring for biasing the retractor 33 to the left. And Retractor 3
3, bent portions 33a, 33a which are vertically separated with the latch cam 34 sandwiched therebetween are formed. The bent portions 33a, 33a respectively extend vertically from the outer peripheral side of the latch cam 34. The parts 34a and 34a are
They are assembled so that they contact each other from the left side. In addition, the upper bent portion 33a of the retractor 33 is
The latch bolt 4 is located at a position in contact with the right end bent portion 4e of the pushed portion 4c of the latch bolt 4 from the left side.

Therefore, when the door inside knob 7 is rotated to the left or right, the latch cam 34 is integrally rotated via the meniscus plate 35, so that either the upper or lower projection 34a is retracted. To the right against the spring force of the retractor spring 36. As a result, as shown in FIG. 9, the pushed portion 4 of the latch bolt 4 is pushed.
c is pushed to the right by the upper bent portion 33a of the retractor 33, and as a result, the head 4a of the latch bolt 4 is retracted from the front 21 (hereinafter, this retracted position is referred to as the latch unlocked position). ) Is pushed to.

Pushed portion 4c of the latch bolt 4
As shown in FIG. 3, a latch actuating lever 37 is further provided above the. This latch operating lever 37
Is arranged such that its upper end contacts the latch actuating lever drive portion 24c of the dead hub 24 from the left side, while its lower end contacts the upward projecting portion 4f of the pushed portion 4c of the latch bolt 4 from the left side. ing. The latch actuating lever 37 is rotatably attached to a pivot 38 provided on the side surface of the case 23 in a protruding shape by a burring process at the right end side in the vertical intermediate position.

Therefore, the dead hub 24 moves from the second rotational angle position θ ₂ shown in the figure to the above-mentioned third rotational angle position θ.
_When it is rotated counterclockwise to ₃ , as shown in FIG. 8, the entire latch operating lever 37 rotates counterclockwise around the pivot 38, and as a result, the lower end of the latch operating lever 37 is pushed. The upward protruding portion 4f of the portion 4c is pushed rightward. This also causes the latch bolt 4 to move to the latch unlocked position described above.

As shown in FIG. 3, the trigger bolt 3 is biased by the trigger spring 41 provided in the case 23 so as to project from the front 21. A latch stopper 42 is further provided between the trigger bolt 3 and the latch bolt 4 so as to be rotatable around a pivot shaft 43 which is erected at the center thereof.

The latch stopper 42 is provided with a latch stopper spring 44 composed of a torsion coil spring that biases the latch stopper 42 in the counterclockwise direction. On the other hand, on the lower side of the trigger bolt 3, there is provided a locking piece 3a extending obliquely downward to the left, and the locking piece 3a is provided.
Further, the latched bent piece 42a on the upper front side of the latch stopper 42 abuts from above, whereby the entire latch stopper 42 is held in a substantially horizontal state against the biasing force of the spring 44. .

When the door 1 is closed, as shown in FIG. 6, the trigger bolt 3 hits the end face of the door frame 45 and is in a retracted state. At this time, the locking piece 3a moves to the right, and the locked bent piece 42 of the latch stopper 42 is moved.
It is separated from a in the right direction. Therefore, the latch stopper 42 is rotated counterclockwise around the pivot 43 by the spring force of the latch stopper spring 44, and is in a downwardly inclined state. In this state, the front end portion of the latch stopper 42 is located on the slide path in the vicinity of the spring receiving surface 4d of the latch bolt 4, thereby preventing the latch bolt 4 from retracting. As a result, in the closed state, an unauthorized latch unlocking operation that tries to immerse the latch bolt 4 through the gap between the door 1 and the door frame 45 is prevented.

As shown in FIG. 9, when the door inner knob 7 is operated to perform the above-mentioned latch unlocking operation and the retractor 33 moves to the right, the retractor 33 is moved.
The latch stopper pushing piece 33b, which is provided in a bent shape at the upper end of the latch stopper 42, moves to the right while pushing down the right end side of the latch stopper 42. As a result, the latch stopper 42 is returned from the inclined position that prevents the latch bolt 4 from being retracted to the horizontal position that allows the retracting operation, and the latch bolt 4 is moved along with the subsequent movement of the retractor 33 to the right. It becomes immersive and enters the latch unlocked state described above.

Further, as shown in FIG. 8, when the dead hub 24 is rotated to the third rotation angle position θ ₃ , the lower end side of the latch actuating lever 37, which rotates in accordance with this, is provided.
By the latch stopper pushing projection 37a provided so as to project to the back side of the paper by the burring process,
Similarly to the above, first, the right end side of the latch stopper 42 is pushed down to bring the latch stopper 42 into a horizontal state, and thereafter, as described above, the retracting operation of the latch bolt 4 occurs.

Next, the structure of the cylinder 10 will be described with reference to FIG. This cylinder 10 is shown in FIG.
As shown in (c) and (d), inside the cylinder body 51,
It is configured by fitting a cylindrical cylinder barrel 52. The cylinder barrel 52 is formed with a key insertion hole 52a which has a rectangular cross section and which penetrates the center position in the axial direction. Then, as shown in FIG. 4D, the key insertion hole 52
A plurality of pin insertion holes 53 ... Which penetrate the cylinder barrel 52 and extend into the cylinder body 51 are formed at the left and right positions with "a" sandwiched therebetween. These pin insertion holes 53 are appropriately selected, and the tumbler pin 54, the driver pin 55, and the driver spring 56 are sequentially inserted from the key insertion hole 52a side. The tumbler pin 54 has a tapered end surface on the key insertion hole 52a side, and this end surface is positioned so as to project into the key insertion hole 52a.
It is biased by the driver spring 56.

As shown in FIG. 2, conical recesses 57 ... Are formed on the surfaces of the keys 8 and 9 to be inserted into the key insertion holes 52a at positions corresponding to the pin insertion holes 53. ing. Keys 8 and 9 that fit the cylinder 10
When is inserted into the key insertion hole 52a, the position of each tumbler pin 54 shown in FIG. 4 (d) changes according to the depth of the concave portions 57, and the outer peripheral end surfaces of all the tumbler pins 54 ,. The cylinder barrel 52 and the cylinder body 51 are positioned so as to coincide with the fitting surface. In this state, the keys 8 and 9 can be rotated together with the cylinder barrel 52.

In the cylinder body 51, as shown in FIG.
As shown in (b) and (c), a cylinder tail 58 formed by punching a flat plate into a T shape is provided on the rear end side so as to rotate integrally with the cylinder barrel 52 and project rearward. . And this cylinder tail 5
8 is housed behind the cylinder barrel 52 so as to be movable by a predetermined distance L in the axial direction, as shown by the chain double-dashed line in FIG. 4 (c).

On the other hand, the two types of keys 8 and 9 described with reference to FIG. 2 are formed such that the insertion lengths when they are inserted into the key insertion holes 52a are different from each other. The short length dimension is the emergency key 8 used in an emergency, and the long length dimension is the guest key 9 which is handed to the guest who uses the hotel room. When the guest key 9 is inserted into the key insertion hole 52a, the rear end of the guest key 9 comes into contact with the cylinder tail 58 and pushes it backward. As a result, the cylinder tail 58 has a length L (for example, 2.5 m) different from that when the emergency key 8 is inserted, compared to when the emergency key 8 is inserted.
It is located so as to project rearward.

Next, referring to FIG. 5, the thumb turn 6
The structure of the thumb turn assembly 60 provided with will be described. As shown in FIG. 5 (b), the thumb turn assembly 60 is configured by allowing a thumb turn body 62 to penetrate a cylindrical thumb turn barrel 61 integrally provided at the rear end of the thumb turn 6. Further, in the thumb turn barrel 61, a tail pressing pin 63 extending rearward in the axial center position is provided.

At the rear end of the thumb turn barrel 61 protruding from the rear end of the thumb turn body 62, as shown in FIG.
As shown in (e), notch-shaped hole fitting portions 61b are formed in which the fan-shaped portions 61a and 61a are left at the symmetrical points of the central points. As shown in FIG. 3, the hole fitting portion 61b is formed in a shape that fits into the rotation center hole 24d of the dead hub 24. In this fitting state, the center of the rotation center hole 24d is formed. A vertical groove 61c is formed as an engagement changing means passing through.

The tail holding pin 63 has the vertical groove 61.
It is provided so as to pass through the center of the hole fitting portion 61b so as to be located substantially at the center of c. Further, as shown in FIG. 5B, a pin spring 64 made of a compression coil spring is provided behind the tail pressing pin 63 in the thumb turn barrel 61, whereby the tip of the tail pressing pin 63 is provided. The hole fitting portion 61b is held at a protruding position that is substantially flush with the end surface of the hole fitting portion 61b.

As shown in FIG. 5D, a circumferential groove 61d is formed on the outer peripheral surface of the thumb turn barrel 61 over a range of approximately 180 °. A tip of a thumb turn retaining pin 65 fixed to the thumb turn body 62 so as to penetrate the thumb turn body 62 in a radial direction is fitted into the circumferential groove 61d. As a result, the thumb turn body 6
The thumb-turn barrel 61 is prevented from being pulled out from the position 2, and the rotation range of the thumb-turn body 62 is regulated at 90 ° in the left-right direction from the position where the thumb-turn 6 is vertical as shown in FIG. 5C. Has become.

Further, as shown in FIG. 5 (b), the moderation is given at these vertical positions and the respective rotation angle positions of 90 ° left and right.
As shown in FIG. 5, the thumb turn body 62 is urged in the axial direction by a stop spring 66 formed of a compression coil spring, and the stop that fits into the recess formed in the outer peripheral surface of the thumb turn barrel 61 at each moderation position. The ball 67 is built in.

The thumb turn assembly 60 having the above structure is shown in FIG.
As shown by the broken line, the cylinder 10 is assembled from the inside of the door 1 and from the outside of the door 1 to the rotation center hole 24d of the dead hub 24 in the lock 5, respectively. There is. More specifically, FIG.
As shown in (a), the hole fitting portion 61b of the thumb turn assembly 60 and the end portions of the cylinder tail 58 of the cylinder 10 are fitted into the rotation center holes 24d, respectively, and the end surface of the cylinder tail 58 is the pin. Spring 64
Is attached so as to be almost in contact with the end face of the tail pressing pin 63 which is in a protruding state.

Next, the operation of the door lock configured as described above will be described. FIG. 6 shows the lock 5 in the locked state when the thumb turn 6 is operated from the indoor side to project the dead bolt 2. In this state, when the door 1 is opened from the outside of the door in an emergency, the emergency key 8 is inserted into the cylinder 10 and unlocked.

At this time, the cylinder tail 58 of the cylinder 10 is vertically positioned in the rotation center hole 24d of the dead hub 24 as shown in FIG. 1B (hereinafter, this position is referred to as the insertion position α ₀ ). . In this state, there is no play when the cylinder tail 58 is rotated counterclockwise. Therefore, when the emergency key 8 is inserted into the cylinder 10 and the key 8 is rotated counterclockwise, the dead hub 24 immediately rotates in the counterclockwise 90 ° range (hereinafter, this range is referred to as the first rotation operation range). by rotating over α of _1), the dead bolt 2 from locked position shown in FIG. 6, FIG. 7
Rotate to the unlocked position shown in.

Then, as shown in FIG. 1B, when the emergency key 8 is further rotated counterclockwise over a range of 45 ° (hereinafter, this range is referred to as a second rotation operation range α ₂ ), the aforementioned operation is performed. Thus, the dead hub 24 rotates the latch actuating lever 37, which causes
After the latch retracting prevention state by the latch stopper 42 is released, the latch bolt 4 is retracted from the end surface 1a of the door 1 to be in the latch unlocked state shown in FIG. In this state, the door 1 is opened by grasping the door outer knob 11 and pulling (or pushing) the door 1.

In the locked state in which the dead bolt 2 is projected as described above, as shown in FIG. 1 (b), the vertical groove 61c is positioned horizontally in the rotation center hole 24d of the dead hub 24. . That is, since the cylinder tail 58 of the cylinder 10 and the vertical groove 61c are positioned orthogonally to each other, in this state, the guest key 9 having the long length described above is provided.
Even if an attempt is made to insert the key into the key insertion hole 52a of the cylinder 10, the cylinder tail 58 comes into contact with the end face of the hole fitting portion 61b, and the cylinder cannot be fully inserted. As a result, in the cylinder 10, the tumbler pin 5
The state in which the cylinder barrel 52 cannot rotate the cylinder barrel 52 is not obtained, so that the key 9 cannot be rotated and the locked state by the dead bolt 2 is maintained.

Next, the unlocking operation by the guest key 9 will be described. When the customer goes out, the dead bolt 2 is unlocked by the thumb turn 6 from the indoor side, and then,
The door inner knob 7 is operated to retract the latch bolt 4 from the end surface 1a of the door 1 as described above, and the door 1 is opened. And
By closing the door 1 by going out to the outdoor side,
As shown in FIG. 5, the latch bolt 4 is locked only.

In this state, as shown in FIG.
The cylinder tail 58 of the cylinder 10 and the vertical groove 61c formed by the hole fitting portion 61b of the thumb turn assembly 60 are both positioned vertically. Therefore, the cylinder tail 58 is pushed in the axial direction to be fitted into the vertical groove 61c, as shown in FIG.
As shown in (c), it can be pushed toward the thumb turn assembly 60 side. Therefore, the guest key 9 can be sufficiently inserted into the key insertion hole 52a of the cylinder 10 and rotated by causing the above operation.

In this case, as shown in FIG. 1D, the sector-shaped portions 61a, 61a of the thumb turn barrel 61 are present in the counterclockwise direction of the cylinder tail 58, and therefore, in the counterclockwise direction. By the rotating operation, this rotating force is transmitted from the cylinder tail 58 to the fan-shaped portion 61a.
-Transmitted to the dead hub 24 via 61a. As a result, even when the dead hub 24 is located at the second rotation angle position θ ₂ , the guest key 9 is inserted into the cylinder 10 and the guest key 9 is inserted from the insertion position α ₀ to approximately 45 within the first rotation operation range α ₁ . By rotating in the range of °, the dead hub 24 immediately rotates from the second rotation angle position θ ₂ to the third rotation angle position θ ₃ . As a result, the latch bolt 4 is retracted from the end surface 1a of the door 1 to enter the latch unlocked state shown in FIG. 8, and the door 1 can be opened.

When the emergency key 8 having a short length is inserted into the cylinder 10 to unlock in the above state, the cylinder tail 58 is not pushed toward the thumb turn assembly 60 side, and the pin spring 64 causes the cylinder tail 58 to move. By the tail pressing pin 63 that is biased, the vertical groove 61
It is held in a state of being separated from c. Therefore, when the emergency key 8 rotates, the cylinder tail 58
Is 90 in the rotation center hole 24d of the dead hub 24.
The rotation range of ° becomes a play range and is not transmitted to the dead hub 24. Thereafter, the dead hub 24 rotates from the unlocked position for the dead bolt 2 to the unlocked position for the latch bolt 4 in the rotation range of 90 ° to 135 °, whereby the door can be opened.

The above embodiment is not intended to limit the present invention, and various modifications can be made within the scope of the present invention.
For example, in the above-described embodiment, the engagement changing means for switching the engagement relationship between the emergency key 8 and the guest key 9 with respect to the dead hub 24 is provided with the hole fitting portion 61b of the thumb turn assembly 60 as the rotation center hole of the dead hub 24. An example in which the vertical lock 61c is formed when it is fitted in the 24d is given, but in the door lock according to claim 1 of the present invention, for example, the emergency key and the guest key are provided without providing the cylinder tail to the cylinder. In addition to having a structure that has a length that penetrates each cylinder, at the end surface on the cylinder side of the dead hub, slit-shaped holes into which these penetrating rear ends fit respectively, are formed at different angular positions for the emergency key and the guest key. Other configurations, such as provision, are possible.

[Embodiment 2] Another embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those of the members shown in the drawings of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

First, the structure of the lock 5 will be described. The dead hub 24 has a structure in which two hub pieces shown in FIG. 11 are stacked, and as described later, the dead hub 24 is always rotated integrally. And the dead hub 24 is
An auxiliary hub 68 as a latch bolt immersion assisting means shown in FIG. 12 is sandwiched between the two hub pieces so that the auxiliary hub 68 can rotate independently of the dead hub 24, as will be described later. Has become.

The auxiliary hub 68 is similar to the dead hub 24.
A cylindrical rotation support portion 68a is provided at the center thereof, and a rotation center hole 68b penetrating in the direction orthogonal to the paper surface is formed at the center position of the rotation support portion 68a. Like the dead hub 24, the rotation center hole 68b has a substantially 8-shaped shape,
More specifically, when two intersecting linear grooves are formed, the four fan-shaped portions defined by the linear grooves are formed by removing two fan-shaped portions that are symmetrical with respect to the center point. Has been done. However, the center angle of the fan shape is different from the rotation center hole 24d of the dead hub 24. The rotation center hole 24d of the dead hub 24 is 110 °, and the rotation center hole 68b of the auxiliary hub 68 is 90 °. .

On the upper portion of the auxiliary hub 68, a projection 68c having substantially the same shape as the latch operating lever drive portion 24c, but having a shorter radial length than the latch operating lever drive portion 24c.
Is provided. Further, the auxiliary hub 68 has a structure shown in FIG.
In, the auxiliary latch actuation lever drive part 68d extends in the lower left direction between the dead bolt drive part 24b and the latch actuation lever drive part 24c.

As shown in FIG. 11, the two hub pieces constituting the dead hub 24 are separated from each other by a pin fitted to the tip of the dead bolt drive portion 24b and a pin fitted to the tip of the latch operation lever drive portion 24c. It is fixed to. Thereby, as described above, the two hub pieces are always rotated integrally with each other about the rotation center hole 24d. On the other hand, as described above, FIG.
Since the projection 68c of the auxiliary hub 68 shown in (4) is shorter than the latch operating lever drive portion 24c, the pin provided at the tip of the latch operating lever drive portion 24c does not touch the auxiliary hub 68. Therefore, the auxiliary hub 68
Are configured to rotate independently of the dead hub 24.

As shown in FIG. 11, a drive portion recess 24b1 is formed on the left side of the root portion of the deadbolt drive portion 24b. Therefore, when the dead bolt 2 is switched to the locked position, even if the dead hub 24 rotates clockwise from the position of FIG. 16 (see FIG. 15), the dead bolt drive portion 24b and the latch operating lever 37 do not come into contact with each other. It has become.

As shown in FIG. 16, the latch bolt 4
In the upper arm portion 37b of the upper portion of the latch actuating lever 37 provided above the pushed portion 4c in, the upper end portion 37c, which is wider than the upper arm portion 37b and extends in the depth direction of the drawing, has a substantially rectangular parallelepiped shape. Is provided. The bottom surface of the upper end portion 37c contacts the latch actuating lever drive portion 24c from the left side, and the side surface of the upper end portion 37b contacts the auxiliary latch actuating lever drive portion 68d from the upper left.

Therefore, when the auxiliary hub 68 rotates clockwise by 45 ° from the position shown in the figure (hereinafter, the rotation position of the projection 68c of the auxiliary hub 68 in this state is changed to the fourth rotation angle position θ).
₄ , the side surface of the upper end portion 37c of the latch operation lever 37 is pushed in the upper left direction by the auxiliary latch operation lever drive portion 68d, as shown in FIG. Thereby,
The entire latch operating lever 37 rotates counterclockwise around the pivot 38, and the lower end portion of the latch operating lever 37 pushes the upward protruding portion 4f of the pushed portion 4c of the latch bolt 4 to the right. Becomes As a result, the latch bolt 4 moves to the latch unlocked position.

Further, as shown in FIG. 16, the latch bolt pushing groove 6 to be described later is formed in the pushed portion 4c of the latch bolt 4.
A bent portion 4c1 is provided that moves in the left-right direction as the pushed portion 4c moves in the left-right direction while being fitted into the 9a.

On the other hand, on the right side of the latch bolt 4, there is a latch bolt receiver 69 which extends in the left-right direction and has the latch bolt pushing groove 69a recessed in the depth direction of the drawing.
3, the bent portion 4c1 of the latch bolt 4 moves in the left-right direction while being fitted in the latch bolt pushing groove 69a, as described above. . Further, the latch bolt receiver 69 has
When the latch bolt 4 is retracted through the front 21, it contacts the right end surface of the pushed portion 4c of the latch bolt 4 and restricts the further movement of the latch bolt 4 from the wall surface on the back side to the front side of the paper surface. Bent portions 69b, 69b that are bent perpendicularly to the direction are formed.

As shown in FIGS. 13A, 13B and 13C, a cylinder tail formed by punching a flat plate into a T-shape is provided at the rear end of the cylinder body 51 of the cylinder 10. On both side surfaces of the T-shaped flat plate forming the 58, a substantially rectangular parallelepiped cylinder tail projection 58a is formed.
-58a is formed.

As shown in FIGS. 14 (a) and 14 (b), a notch-shaped hole fitting portion 61b in which four fan-shaped portions are removed is formed at the rear end of the thumb turn barrel 61. . As shown in FIG. 16, the hole fitting portion 61b is formed in a shape that fits into the rotation center hole 24d of the dead hub 24, and in this fitting state, the rotation center hole 2b.
Two grooves passing through the center of 4d, that is, a lateral groove 61e (engagement changing means) and a vertical groove are formed.

Next, the operation of the door lock having the above structure will be described. As shown in FIG. 15, when the thumb turn 6 is operated from the inside of the room and the dead bolt 2 is projected, the emergency key 8 is locked in the cylinder 10 in a locked state.
, And the dead bolt 2 and the latch bolt 4 are unlocked as follows.

First, as shown in FIG. 10A, the cylinder tail 58 of the cylinder 10 is vertically positioned within the rotation center hole 24d of the dead hub 24. Here, when the emergency key 8 is inserted into the cylinder 10 and rotated counterclockwise, the cylinder tail 58 starts rotating counterclockwise. Then, after the cylinder tail 58 undergoes some play, the dead hub 24 rotates counterclockwise. As a result, the dead bolt 2 rotates from the locked position to the unlocked position. The cylinder tail 58
Does not reach the auxiliary hub 68 in the direction of its rotation axis.

Then, when the emergency key 8 is further rotated counterclockwise over a range of 45 °, the dead hub 24 rotates the latch operating lever 37 to bring the latch into the unlocked state.

Next, the unlocking operation by the guest key 9 will be described. As shown in FIG. 16, the door 1 is locked by only the latch bolt 4. In this state,
As shown in FIGS. 10B and 10C, the lateral groove 61e extends over both the auxiliary hub 68 and the dead hub 24. Therefore, the cylinder tail protrusion 58a can be pushed in the axial direction so as to be fitted into the lateral groove 61e and pushed to the side of the thumb turn assembly 60. Therefore, when the long guest key 9 is inserted, the cylinder tail 58 is pushed in the axial direction, and both the cylinder tail 58 and the cylinder tail protrusion 58 a fit into the dead hub 24 and the auxiliary hub 68. In this way, the guest key 9 can be sufficiently inserted and rotated in the key insertion hole 52a of the cylinder 10 by causing the above operation.

In this case, the side surfaces of the respective rotation center holes of the dead hub 24 and the auxiliary hub 68 are in contact with the cylinder tail protrusion 58a in the counterclockwise direction. Therefore, this rotational force is transmitted from the cylinder tail 58 to the dead hub 24 and the auxiliary hub 68 by the counterclockwise rotation operation of the cylinder tail protrusion 58a. As a result,
Even when the dead hub 24 is located at the second rotation angle position θ ₂ , the guest key 9 is inserted into the cylinder 10 and is inserted from the insertion position α ₀ to the first rotation operation range α ₁ within a range of approximately 45 °. By rotating with
The dead hub 24 immediately rotates from the second rotation angle position θ ₂ to the third rotation angle position θ ₃ . As a result, the latch bolt 4 is retracted from the end surface 1a of the door 1 to be in the latch unlocked state, and the door 1 can be opened.

Further, as shown in FIG. 8B, another side surface of the rotation center hole 58a of the auxiliary hub 68 is in contact with the cylinder tail 58 in the clockwise direction. Therefore, when the cylinder tail 58 is rotated clockwise, this rotational force is transmitted from the cylinder tail 58 to the auxiliary hub 68. As a result, the auxiliary hub 68 moves the second rotation angle position θ.
_The clockwise rotation starts from ₂ to the fourth rotation angle position θ ₄ . In this case, the latch bolt 4 can be immediately moved to the latch unlocked position without moving the dead bolt 2 to the locked position for the reason described below.

That is, as described above, the dead hub 2
The central angle of the fan-shaped portion of the rotation center hole 24d of No. 4 is the auxiliary hub 6
8 is larger than the central angle of the fan-shaped portion of the rotation center hole 68a of FIG. 8, the side surface of the rotation center hole 24d of the dead hub 24 is in contact with the cylinder tail 58 in the clockwise direction as shown in FIG. I don't touch. Therefore, in the initial stage of the clockwise rotation operation of the cylinder tail 58, this rotational force is not transmitted from the cylinder tail 58 to the dead hub 24. Therefore, in the initial stage of the clockwise rotation of the auxiliary hub 68, the dead hub 24 does not rotate clockwise.

When the auxiliary hub 68 is further rotated clockwise, the cylinder tail 58 contacts the side surface of the rotation center hole 24d of the dead hub 24, and the dead hub 24 also starts clockwise rotation. However, as shown in FIG. 16, the surface of the deadbolt drive portion 24b that pushes the concave portion 2a of the deadbolt 2 to the left and the surface of the concave portion 2a that is pushed, the dead hub 24 starts rotating clockwise. They are far apart at the time. Furthermore, after the dead hub 24 starts rotating clockwise, the distance gradually narrows with the rotation, but the auxiliary latch actuating lever 68d moves the latch bolt 4 completely to the latch unlocked position. Up to this point, the dead bolt drive portion 24b is adjusted in advance so that it does not come into contact with the recess 2a.

In addition, when the guest key 9 is rotated rightward as described above to completely unlock the latch bolt 4, as shown in FIG. 17, the right end of the latch bolt 4 is covered. The pushing portion 4c is in contact with the side surfaces of the bent portions 69b, 69b of the latch bolt receiver 69. Therefore, further rotation of the guest key 9 to the right is restricted, and the dead hub 24 cannot rotate any further. Therefore, while the latch key 4 is moved to the latch unlocked position by the guest key 9, the dead bolt driving portion 24b is moved.
Does not come into contact with the recess 2a, and there is no concern that the dead bolt 2 is projected by turning the guest key 9 clockwise.

In the above state, when the short emergency key 8 is inserted into the cylinder 10 for unlocking, the cylinder tail 58 is provided with the thumb turn assembly 60.
Since it is not pushed to the side, the cylinder tail protrusion 58a
Does not reach the dead hub 24. Therefore, a rotation range of 90 ° to the left exists as a play range in the rotation center hole 24d of the dead hub 24 in the state of FIG. 16, and in this range, the rotational force of the cylinder tail 58 to the left is increased. Is not transmitted to the dead hub 24. After that, when the cylinder tail 58 shifts to the rotation range of 90 ° to 135 °, the dead hub 24 accordingly starts to rotate counterclockwise. Then, the latch bolt 4 moves to the latch unlocked position, and the door can be opened.

[0085]

As described above, in the door lock according to the first aspect of the present invention, when the emergency key is inserted into the cylinder with both the dead bolt and the latch bolt protruding, the door lock is inserted from the insertion position to the first position. After the immersion operation of the dead bolt occurs by the rotation operation of the emergency key up to one rotation operation range, the latch bolt is retracted by the rotation operation up to the second rotation operation range following the first rotation operation range. While the operation occurs, when the guest key is inserted into the cylinder in the state where the dead bolt is depressed and the latch bolt is projected, the latch bolt is retracted by the rotation operation from the insertion position to the first rotation operation range. like,
The configuration is provided with engagement changing means for switching the engagement position relationship between the emergency key and the guest key with respect to the dead hub.

As a result, when the guest key inserted into the cylinder is rotated, the latch bolt is immediately retracted, so that the guest key handed to the guest from the hotel is not a key suitable for the cylinder. Alternatively, it is possible to improve reliability and unlocking operability because there is no distrust due to erroneous judgment such as broken cylinder, and there is no need to change the grip state with fingertips on the way. Produce an effect.

In the door lock according to the second aspect of the present invention, when the dead hub is located at the second rotation angle position corresponding to the state in which the dead bolt is retracted and only the latch bolt is projected, the cylinder insertion length is longer than the emergency key. When the guest key is inserted into the cylinder, the engagement groove into which the tip of the cylinder tail that is pushed to the thumb turn side fits and engages is the engagement that switches the engagement position relationship between the emergency key and the guest key with respect to the dead hub. As the changing means, it is formed on the hole fitting portion side.

As a result, when the guest key inserted in the cylinder is rotated, the dead hub is rotated through the hole fitting portion, so that the dead hub is rotated from the second rotation angle position to the third rotation angle position. It occurs immediately and the door can be opened by the latch bolt's immersive action,
The reliability is improved and the unlocking operability is improved.

In the above structure, the above operation can be obtained by changing only the structure of the thumb turn assembly side, and the lock, the cylinder and the keys have the same specifications as before. In particular, it is possible to minimize the cost of remodeling and the replacement work particularly when the existing door lock is made to have the above-mentioned operation specifications, which makes it possible to further reduce the overall manufacturing cost. It has the effect of being able to.

According to a third aspect of the present invention, in the door lock according to the first aspect, when the guest key is inserted into the cylinder in a state where the dead bolt is depressed and the latch bolt is projected, the first key is inserted from the insertion position. Even when the turning operation is performed in the direction opposite to the turning operation range, the latch bolt immersing assisting means for causing the immersing operation of the latch bolt is provided.

As a result, no matter which direction the guest key inserted in the cylinder is rotated, the latch bolt is immediately retracted. Therefore, in addition to the same effect as the door lock according to the first aspect, the user does not hesitate in which direction the key should be rotated, and the unlocking operability is further improved.

[Brief description of drawings]

FIG. 1 is a view showing a main structure of a door lock according to an embodiment of the present invention, in which FIG. 1 (a) shows a relationship between a cylinder, a thumb turn assembly, and a dead hub when an emergency key is inserted into the cylinder. Schematic diagram showing the relationship,
The figure (b) is a sectional view taken along the line AA in the figure (a), and the figure (c) shows the engagement relationship between the cylinder, the thumb turn assembly, and the dead hub when the guest key is inserted into the cylinder. FIG. 6D is a schematic view showing the above, and is a cross-sectional view taken along the line BB in FIG.

FIG. 2 is a side view showing an overall configuration of the door lock as seen from a door end surface side.

FIG. 3 is a partially cutaway front view showing an internal structure of a lock of the door lock.

4A and 4B are views showing the structure of the cylinder, wherein FIG. 4A is a perspective view, FIG. 4B is an end view, and FIG. 4C is a partially cutaway vertical sectional view; d) is a partially cutaway plan sectional view.

5A and 5B show a structure of the thumb turn assembly, in which FIG. 5A is a perspective view, FIG. 5B is a partially cutaway vertical sectional view, and FIG. ) Line CC view, FIG. 7D is a sectional view taken along line D-D in FIG. 7B, and FIG. 8E is a view taken along line EE in FIG. Is.

FIG. 6 is a partially cutaway front view showing the inside of the lock when the door is locked.

FIG. 7 is a partially cutaway front view showing the inside of the lock when the dead hub is rotated from the state of FIG. 6 to immerse the dead bolt.

FIG. 8 is a partially cutaway front view showing the inside of the lock when the dead hub is further rotated from the state of FIG. 7 to immerse the latch bolt.

9 is a partially cutaway front view showing the inside of the lock when the door inner knob is rotated to immerse the latch bolt in the state of FIG. 6. FIG.

FIG. 10 is a view showing a main structure of a door lock according to another embodiment of the present invention, in which FIG. 10 (a) shows the engagement relationship between the cylinder tail and the dead hub when the emergency key is inserted into the cylinder. Sectional view showing the same, (b)
Is a cross-sectional view showing the engagement relationship between the cylinder tail and the auxiliary hub when the guest key is inserted into the cylinder, and FIG. 6C shows the engagement relationship between the cylinder tail and the dead hub in FIG. It is sectional drawing shown.

FIG. 11 is a plan view showing the dead hub.

FIG. 12 is a plan view showing the auxiliary hub.

FIG. 13 shows the structure of the cylinder,
The figure (a) is a perspective view, the figure (b) is an end view, the figure (c).
FIG. 3 is a partially cutaway vertical sectional view.

14A and 14B show a structure of the thumb turn assembly, wherein FIG. 14A is a perspective view and FIG. 14B is a bottom view in FIG. 14A.

FIG. 15 is a partially cutaway front view showing the inside of the lock when the door is locked.

16 is a partially cutaway front view showing the inside of the lock when the dead hub is rotated counterclockwise from the state of FIG. 15 to immerse the dead bolt.

17 is a partially cutaway front view showing the inside of the lock when the auxiliary hub is rotated clockwise from the state of FIG. 16 to immerse the latch bolt. FIG.

FIG. 18 is a view showing a main configuration of a conventional door lock,
(A) of the figure is a schematic diagram showing the engagement relationship between the cylinder, the thumb turn assembly, and the dead hub when the emergency key is inserted into the cylinder, and (b) is the FF line in the figure (a). A sectional view taken in the direction of the arrow, FIG.
The schematic diagram which shows the engagement relationship of a cylinder, a thumb turn assembly, and a dead hub when a guest key is inserted in a cylinder, the same figure (d) is a GG line arrow sectional view in the same figure (c).

FIG. 19 is a view showing a thumb turn assembly in the conventional door lock, in which FIG. 19 (a) is a perspective view and FIG. 19 (b) is a partially cutaway vertical sectional view.

[Explanation of symbols]

 1 Door 2 Dead Bolt 4 Latch Bolt 5 Lock 6 Sum Turn 8 Emergency Key 9 Guest Key 10 Cylinder 24 Dead Hub 24d Rotation Center Hole 58 Cylinder Tail 58a Cylinder Tail Protrusion 60 Thumb Turn Assembly 61b Hole Fitting 61c Vertical Groove (Change Engagement Means) 61e lateral groove (engagement changing means) 68 auxiliary hub (latch bolt immersion assisting means) 69 latch bolt receiver

Claims (3)

[Claims] 1. A thumb turn assembly having a hole fitting portion which fits into a rotation center hole of the dead hub, comprising a dead bolt and a latch bolt, and a rotatable dead hub for retracting the dead bolt. It is a door lock formed by assembling the cylinder from the inside and from the door outside of the rotation center hole, and the emergency key is inserted into the cylinder with both the dead bolt and the latch bolt protruding. At this time, after the dead bolt is retracted by the rotation operation of the emergency key from the insertion position to the first rotation operation range, the second rotation operation continues to the first rotation operation range.
When the guest key is inserted into the cylinder with the dead bolt retracted and the latch bolt protruding while the latch bolt is retracted by the rotation operation up to the rotation operation range, the first rotation operation is performed from the insertion position. A door lock, characterized in that engagement change means is provided for switching the engagement position relationship between the emergency key and the guest key with respect to the dead hub so that the latch bolt is retracted by a pivoting operation up to the range. 2. A dead bolt, a latch bolt, and a dead hub are provided, and the dead hub is retracted by rotating the dead hub from a first rotation angle position corresponding to the protruding state of both bolts to a second rotation angle position. ,further,
A lock that causes the latch bolt to be retracted by rotating the dead hub from the second rotation angle position to the third rotation angle position, and a hole fitting that is provided inside the door and that fits into the rotation center hole of the dead hub. A thumb turn assembly having a portion at the inner end, and a cylinder having a plate-shaped cylinder tail at the inner end that is inserted into the rotation center hole facing the hole fitting portion from the outside of the door, The rotation center hole is such that the cylinder tail does not move when the dead hub is rotated from the second rotation angle position to the first rotation angle position when the hole fitting portion is rotated from the inside of the door to project the dead bolt. In order to be retained by the cylinder tail, it is formed in a shape having a play space for the cylinder tail, and when the dead hub is in the first rotation angle position, the emergency key is inserted into the cylinder. When to Nde rotated,
A door lock in which the cylinder tail engages with a rotation center hole and the dead hub rotates from a first rotation angle position to a second rotation angle position to a third rotation angle position. When located in the rotation angle position, by inserting a guest key with a longer cylinder insertion length than the emergency key into the cylinder, the tip of the cylinder tail that is pushed toward the thumb turn side fits into and engages with the engagement groove. A door lock formed on the hole fitting portion side as engagement changing means for switching the engagement position relationship between the emergency key and the guest key with respect to the dead hub. 3. When the guest key is inserted into the cylinder with the dead bolt retracted and the latch bolt protruding, the latch bolt is rotated from the insertion position in the direction opposite to the first rotation operation range. 2. The door lock according to claim 1, further comprising latch bolt immersing assisting means for causing the immersing operation of the door lock.