JP2553291B2 - Door lock - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock for reversing a latch to open and close a door.

[0002]

2. Description of the Related Art Conventionally, door locks with a trigger mechanism have been used for doors of hotel guest rooms and the like, in which a latch is retracted by a slight force to open and close the door.

FIG. 10 shows a conventional door lock with a trigger mechanism. In this door lock, a latch bolt 62 provided inside a case 61 is urged by a coil spring 63 in a direction of protruding from the case 61. The latch bolt 62
A trigger member 65 is rotatably attached to the tip of the shaft via a fulcrum shaft 64. Further, the pin 66 provided on the trigger member 65 is fitted into the long hole 67 of the latch bolt 62, and the tip end portion of the trigger member 65 is projected from the tip inclined surface 68 of the latch bolt 62.

In this door lock, the position at which the tip of the trigger member 65 and the receiving metal fitting 50 of the door frame abut is set to a distance closer to the fulcrum shaft 64 than the pin 66, and the coil spring is different from the coil spring depending on the distance. A lever mechanism is formed, and when the receiving fitting 50 and the trigger member 65 come into contact with each other, the lever spring causes the coil spring 63 to contract with a large force,
The latch bolt 62 is designed to be immersed.

[0005]

However, in the conventional door lock described above, the latch bolt 62 has the trigger member 65.
Since it slides integrally with the latch bolt 62, the spring force of the coil spring 63 always acts on the latch bolt 62, and as the coil spring 63 contracts, a repulsive force gradually increases.
Will join. For this reason, there is a characteristic that the movement of the latch bolt that is immersed gradually becomes sluggish, the responsiveness of the movement of the latch bolt is poor, and sometimes the movement of the latch bolt is stopped during the immersion.

In a hotel or the like, a function of opening the door immediately is required in the event of an emergency such as a fire or an earthquake. In the conventional door lock shown in FIG. 10, the latch bolt 62 is completely closed. The lock cannot be unlocked unless the operation handle or the like is turned until it is immersed in the case 61, so there is a drawback that it takes time to open the door.

In addition, since many doors of hotels and the like open and close in different directions, door locks used for such doors are required to have a structure that can be easily recombined into a reverse-handed lock.

[0008] Therefore, the present invention, it is possible to perform lightly <br/> smoothly retractable latch, it can perform opening of the door in real and can be varied easily set without permission of the latch It is intended to provide door locks.

[0009]

In order to solve the above problems, the present invention provides a case inside a lock box, in which a front plate detachably attached to the lock box can prevent the lock box from coming out of the lock box. Inside the case, a reversible latch protruding and retracting through an opening provided in the front plate and a slider urged toward the latch by an elastic member are provided, and a rear end portion is provided between the latch and the slider. A trigger member that comes into contact with the latch is movably formed, and the tip end of the trigger member is formed so as to be retractable from the tip inclined surface of the latch. an engagement member for stopping the inversion provided in the trigger member is to incorporate motion amplifying mechanism for transmitting expansion much to the rear end portion of the movement amount received by the tip.

[0010]

In the latch actuator having the above structure, the trigger member is pressed toward the latch by the slider inside the case, and the tip of the trigger member is projected from the inclined surface of the latch. When the door frame bracket comes into contact with the tip of the trigger member from this state when the door is closed , the motion expansion
The rear end of the trigger member was expanded due to the action of the large mechanism .
Push back the slider by the amount of movement . When the engagement member of the slider and the rear end of the latch are disengaged from each other, the latch can be freely inverted, so that the door can be retracted very lightly after that.

On the other hand, when the door lock is opened, the slider is moved in the direction away from the latch by operating the door handle or the like to disengage it from the engagement position with the latch. As a result, the latch can be flipped over so that the door can be opened immediately.

Further, the convenience of using the door lock can be changed by removing the front plate from the lock box, pulling out the case, and inserting the case into the lock box with the direction of the latch reversed.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the entire structure of the door lock of the embodiment. Inside the lock box 1, an electromagnetic lock mechanism C is provided on the upper side, and a latch actuating device A and a latch actuating device are provided on the lower side thereof. An operating mechanism B for operating A is provided.

As shown in FIGS. 2 to 5, the latch actuating device A is provided with a square tubular case 2 which is removably inserted into the lock box 1, and with the case 2 inserted, By attaching the front plate 4 to the front surface of the lock box 1 with the screw 3, the end portion of the case 2 is brought into contact with the back surface of the front plate 4 to prevent the case 2 from coming out of the lock box 1.

Further, an opening 5 facing the metal fitting 50 of the door frame is formed in a portion of the front plate 4 corresponding to the latch actuating device A, and a latch 6 is provided at the end of the case 2 on the opening 5 side. It is incorporated.

The latch 6 is incorporated into the opening 5 of the case 2 so as to be retractable and retractable inside the case 2, and a step portion 7 provided on both side surfaces of the latch 6 is provided.
The front plate 4 is engaged with the front plate 4 to prevent the latch from coming out forward. In the latch 6, one side surface of the tip is formed with an inclined surface 8 and the other side surface is formed with a vertical surface 9, and a through groove 10 into which a trigger member 22 described later is slidably inserted is formed in the central portion. Has been formed.
Further, a pair of protrusions 11, 11 with which an engaging member 16 described later is engaged is formed at the rear end portion of the latch 6, and the engaging portion of the engaging member 16 is provided between the both protrusions 11, 11. A gap 12 larger than the width of 21 is provided.

On the other hand, inside the case 2, a slider 13 is movably provided, and a coil spring 14 for urging the slider toward the latch 6 is incorporated on the rear side of the slider 13. The slider 13 includes rails 30 provided on both sides of the slider 13 and grooves 3 provided on both sides of the case 2.
When 1 is engaged, it is guided so as to move linearly inside the case 2.

A space 15 is formed inside the slider 13 and opens forward and sideways, and an engaging member 16 is incorporated in the space 15. The engagement member 16 is slidable in a direction orthogonal to the moving direction of the slider 13 by fitting the long holes 17 and 17 and the pins 18 and 18 provided on the slider 13. Further, the engaging member 16 is constantly urged downward by the leaf spring 19 that has entered the space 15 from the electromagnetic lock mechanism C, and the end portion of the engaging member 16 is moved to the side surface of the slider 13 by this urging. It projects toward the operation mechanism B from the opening 20 provided.

Further, on one side of the engaging member 16,
Engagement portion 2 that engages with projections 11 and 11 at the rear end portion of latch 6
1 is formed, the inversion of the latch 6 is stopped by the engagement of the engaging portion 21 and the protrusion 11, and the latch 6 is held in the upright state.

A trigger member 22 is movably incorporated between the latch 6 and the slider 13 as shown in FIGS. 4 and 5. This trigger member 22 is
Actuating piece 23 whose tip is an inclined surface 24 and its operating piece 2
3 includes a pressing plate 26 rotatably attached to one end of the actuating piece 23 via a pin 25, and a guide plate 28 rotatably attached to the other end of the operating piece 23 by a pin 27. A recess 29 whose end is formed on the front surface of the slider 13.
Is in contact with

Further, the operation piece 23 on the tip side is inserted into the through groove 10 of the latch 6 and incorporated so as to be retractable from the tip side of the latch. As shown in FIG. 5, the latch 6 is erected. In this state, the inclined surface 24 of the operating piece 23 projects forward from the inclined surface 8 at the tip of the latch, and
It comes into contact with 0.

On the other hand, guide grooves 32 and 33 extending in the longitudinal direction of the case are provided on both side surfaces of the case 2, and the pressing plate 2 of the trigger member 22 is fitted into the guide grooves 32 and 33.
6 and the guide plate 28 are slidably fitted together. The guide grooves 32 and 33 allow the slider 1 to move when the trigger member 22 moves.
It serves to guide along the moving direction of 3.

Further, both ends of a winding spring 34 fitted on the pin 25 are engaged with the inner surfaces of the pressing plate 26 and the operating piece 23, and the operating spring 23 and the pressing plate 26 are engaged by the winding spring 34. It is urged away from each other. As a result, the pressing plate 26 is always pressed against the recess 29 of the slider 13, and the pressing plate 26 and the guide plate 28 are pressed toward both side surfaces of the case 2 so that both plates 26, 28 are pressed. With one side fitted in the guide grooves 32, 33, the trigger member 22 rotates about the connecting pin 27 of the guide plate 28 as a fulcrum as shown in FIG. 6 and slides inside the case in that posture. It has become.

Further, in the trigger member 22, the distance L ₁ from the position where the operating piece 23 and the receiving metal fitting 50 abut to the pin 27 which is the fulcrum of rotation is from the fulcrum pin 27 to the connecting pin 25 of the pressing plate 26. Less than distance L ₂ (L
₁ <L ₂ ) is set, and the motion expansion is
It constitutes a large mechanism. That is, when the receiving metal fitting 50 comes into contact with the inclined surface 24 of the operating piece 23, the operating piece 23 is pin 2
7 about the fulcrum, but due to the action of the motion enlarging mechanism due to the difference between the distances L ₁ and L ₂ , the pressing plate 26 is moved.
The dynamic stroke is enlarged and the push-back plate 26 pushes it back.
The push-back stroke of the rider 13 can be extended.
It

On the other hand, as shown in FIG. 2, the door lock operating mechanism B provided adjacent to the latch actuator A includes an operating shaft 35 to which the door handle is connected, and a notch 36 on the peripheral surface of the operating shaft 35. The switch piece 37 that abuts is provided, and the switch piece 37 faces the end portion of the engaging member 16 that protrudes from the case 2. In this operation mechanism B, when the switch piece 37 is turned upward by the operation shaft 35 as shown in FIG. 3, the engaging member 16 is pushed upward and the engaging portion 2 is moved.
1 moves to the gap 12 between the protrusions 11 of the latch 6, and the latch 6 is free to be inverted.

The electromagnetic lock mechanism C provided on the upper portion of the door lock is, as shown in FIG. 1, a solenoid 38, a lock shaft 39 driven by the solenoid 38, and the operation shaft 35 of the operation mechanism B from the solenoid 38. When the solenoid 38 is actuated, the lock shaft 39 pops out and locks, and the connecting member 40 pushes the notch 41 on the peripheral surface of the operating shaft 35 to rotate the switch piece 37. It is like this.

The door lock of the embodiment has the above structure,
Next, the operation will be described. As shown in FIGS. 2 and 5,
In the state where the case 2 is mounted inside the lock box 1, the elasticity of the coil spring 14 pushes the slider 13 forward, the engagement member 16 engages with the protrusion 11 of the latch, and the latch 6 is held in the upright state. . Further, the trigger member 22 is pressed against the latch 6, and the tip of the operating piece 23 is in a state of protruding from the inclined surface 8 of the latch 6.

[0028] Now, from this state, the receiving metal 50 of the door frame on the inclined surface 24 of the actuating piece 23 abuts, the actuating piece 23 pivots pins 27 to pivot, but the operation by the action of the motion amplifying mechanism The movement amount of the piece 23 is enlarged and transmitted to the pressing plate 26, and the pressing plate 26 pushes the slider 13 back. Therefore, the coil spring 14 contracts and the slider 13
Moves rearward, and the operating piece 23 moves rearward.

When the slider 13 is pushed back in this way, as shown in FIG. 5, the engagement between the engaging member 16 and the projection 11 is disengaged, and the latch 6 is in a reversible state. The latch 6 is retracted and the door is closed smoothly.

Next, when the door is completely closed and the receiving fitting 50 and the latch 6 face each other as shown in FIG. 7, the latch 6 is pushed onto the receiving fitting 50 by pushing out the slider 13 by restoring the coil spring 14. The latch 6 is pushed out, the engagement member 16 and the protrusion 11 are engaged with each other, and the posture of the latch 6 is maintained in the upright state.

On the other hand, when the door is opened, as shown in FIG. 3, the operating shaft 35 of the operating mechanism B is rotated by the door handle, and the engaging member 16 is pushed up by the switch piece 37 to engage the engaging portion 2
1 and the engagement of the protrusion 11 of the latch 6 are released. This allows
Since the latch 6 is in a state in which it can be freely inverted, when the door is opened next time, the latch 6 is engaged with the receiving metal 5 as shown in FIG.
When the trigger member 22 is pushed back, the trigger member 22 is pushed back, and is immersed in the case 2. Therefore, the door can be opened immediately by a slight turning operation of the door handle.

Further, in the above door lock, when the door is opened and closed in the opposite direction, the front plate 4 is detached from the lock box 1 and the latch actuating device A is pulled out together with the case 2, and as shown in FIG. The case 2 is attached to the lock box with the direction of 6 reversed. As a result, the directions in which the latch 6 and the receiving member 50 contact each other are reversed, and the door lock can be easily recombined.

[0033]

As described above, according to the present invention, when the slider is pushed back together with the trigger member, the engagement between the slider and the latch is disengaged, and the latch is freely inverted. Therefore, when the door is closed, the latch is slightly retracted. is to be able, can Rukoto close the door reliably and smoothly.

Further, since the latch can be turned upside down by disengaging the latch from the slider, there is an advantage that the door can be opened immediately by a slight operation amount of the door handle or the like.

Further, since all the parts for activating the latch are incorporated in the case which is detachable from the lock box, the convenience of using the door lock can be easily changed by changing the inserting direction of the case with respect to the lock box. be able to.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing the entire structure of a door lock.

FIG. 2 is a cross-sectional view showing an enlarged main part of the above.

FIG. 3 is a sectional view showing the operating state of FIG.

FIG. 4 is an exploded perspective view showing a latch and a trigger member of the latch actuator.

FIG. 5 is a cross-sectional plan view of a latch actuator.

FIG. 6 is a sectional view showing an operating state of the above.

FIG. 7 is a sectional view showing an operating state of the above.

FIG. 8 is a sectional view showing an operating state of the above.

FIG. 9 is a sectional view of a latch actuating device in which the direction of the latch is changed.

FIG. 10 is a sectional view showing a conventional example.

[Explanation of symbols]

 A latch operating device B operating mechanism C electromagnetic lock mechanism 1 lock box 2 case 4 front plate 6 latch 8 inclined surface 11 protrusion 13 slider 14 coil spring 16 engaging member 21 engaging portion 22 trigger member 23 operating piece 26 pressing plate 28 guide plate 35 Operation axis 37 Switch piece 50 Receiving metal fitting

Claims (1)

(57) [Claims] 1. A lock box is provided with a case in which the front plate detachably attached to the lock box prevents the lock plate from coming out of the lock box, and the case is retracted from the opening provided in the front plate inside the case. A reversible latch and a slider that is biased toward the latch by an elastic member are provided, and a trigger member whose rear end contacts the slider is movably provided between the latch and the slider. The tip portion is formed so as to be retractable from the tip inclined surface of the latch, and the slider is provided with an engaging member that engages with the rear end portion of the latch to stop the flipping of the latch. expansion <br/> door lock incorporating a motion amplifying mechanism for transmitting much the amount of movement to the rear end portion received in parts.