JP4181787B2 - Door guard with lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a novel door guard that can be operated from the outside and locked when it is out of the door guard, which can restrict the degree of door opening to a small level and can safely check visitors and deliver mail. This relates to a lockable door guard.
[0002]
[Prior art]
For example, as shown in FIG. 1, the door guard is provided on an inner surface of the door frame 3 and an elongated gate-shaped connecting rod 2 provided on the inner surface of the free side edge of the door 1 so as to be rotatable around a vertical axis. And a receiving rod 5 with a bulging head 4.
[0003]
In use, when the door 1 is closed, the connecting rod 2 is raised, the bulging head 4 of the receiving rod is hidden in the wide insertion portion 6 at the base end, and the door 1 is opened in this state. The hook 5 is slidably engaged with a guide slot 7 having a narrower width than the guide slot 7 connected to the insertion portion 6 of the connecting hook.
[0004]
In the use state of the door guard shown in FIG. 1, the connecting rod 2 cannot be disengaged from the receiving rod 5 due to the presence of the bulging head 4, so that the door opening angle can be kept below a certain level. Visitors can be confirmed and mail can be delivered.
[0005]
[Problems to be solved by the invention]
The conventional door guard described above has a simple structure, and the door opening angle in the unlocked state can be reliably kept below a certain level, so that visitors can be confirmed and mail can be delivered. Does not allow, and does not have the problem to be solved by itself.
[0006]
By adding the function that the connecting rod 2 can be engaged with the receiving rod 5 from the outdoor side, that is, the door guard can be operated and locked from the outdoor side, to the conventional door guard. It aims to provide a new safety device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a flat block body in which the width direction is vertical and the thickness direction is horizontal. The base end is pivotably supported in a horizontal plane, and the free end is biased in the direction approaching the inner surface of the door, and the door frame portion at the same height as the connection side A cylinder lock fixed so as to protrude to the inner surface of the cylinder lock, a support shaft integrally and coaxially coupled to the inner cylinder of the cylinder lock, and a protrusion protruding radially from the tip of the support shaft. A locking claw that allows the operating angle position where the locking claw is vertical to be locked by the cylinder lock, and a lock that penetrates the free end of the connecting rod in the thickness direction and is in the operating angle position An insertion hole that is shaped to allow the nail to pass through and to be connected to this insertion hole. A guide slot that opens along the longitudinal direction of the connecting rod and slidably engages with the support shaft, and is formed at the opening edge of the guide slot, leaving a stop between the insertion hole and the guide slot. , A locking groove formed so that the locking claw can be engaged, and a communication portion formed at the base end portion of the locking groove and having a width through which the locking claw can pass, when the door guard is activated When unlocking the cylinder lock with the key from the room side, turn the spindle to place the locking claw in the operating angle position, remove the key from the key hole, and then close the door from the room side through the door opening. While the door is still slightly open, raise the connecting rod that falls on the inner surface of the door, insert the tip of the spindle into the insertion hole at the tip, and then use the relative movement of the connecting rod and the spindle when the door is closed Then, the latching claw is engaged with the latching claw by moving the latching claw toward the base end while being in sliding contact with the back surface of the connecting rod and further closing the door. Align the communicating portion of the groove, following Te, characterized in that so as cause engaged locking pawl in the locking groove by utilizing the urging force of the connecting rod.
[0008]
【Example】
Hereinafter, an embodiment of the present invention with reference to FIGS 8.
2 and 3, reference numeral 2 denotes a connecting rod, and the connecting rod 2 in the illustrated embodiment is a flat block body whose base end (left end in the figure) is the inner surface of the free side end edge portion of the door 1 in the horizontal plane. It is supported so that it can rotate inside.
[0009]
The connecting rod 2 is supported by the door 1 so that the width direction is vertical, in other words, the thickness direction is horizontal.
[0010]
The connecting rod 2 is moved in the direction in which the free end is close to the inner surface of the door 1 by the elasticity of the connecting rod spring 8 as a torsion coil spring elastically mounted on the base end, in other words, in the clockwise direction in FIG. It is biased in the direction of rotation.
[0011]
On the other hand, a cylinder lock 9 is fixed in the vicinity of the door opening at the portion of the door frame at the same height as the connecting rod 2 so as to protrude to the indoor side.
[0012]
As this cylinder lock, it is possible to adopt all types of cylinder locks such as currently used cylinder locks such as pin cylinder locks, disc tumbler locks, lever tumbler locks, or rotary disc tumbler locks recently developed by the applicant. it can.
[0013]
A cylindrical support shaft 11 is integrally and coaxially coupled to the inner cylinder of the cylinder lock 9. As shown in FIG. 3, a key hole of the inner cylinder is opened through the support shaft on the outer end surface of the support shaft 11.
[0014]
Further, at least one locking claw 12 protruding in the radial direction is integrally provided at the tip of the support shaft 11.
[0015]
This locking claw 12 is operated with the angular position indicated by the solid line in FIG. 3, that is, the horizontal angular position as the standby angular position, and the angular position indicated by the chain line, that is, the vertical angular position as the operating angular position. The angle position of the inner cylinder of the cylinder lock is set so that the angle position can be locked by the cylinder lock 11, that is, the angle can be fixed.
[0016]
Specifically, for example, in the lever tumbler lock, the mounting angle position of the cylinder lock is set so that the locking claw is in the operating angle position in the locked state where the locking bar is engaged with the cam groove of the outer cylinder. ing.
[0017]
The cylinder lock of the lock guard arm according to the present invention must be able to remove the key from the inner cylinder even when the locking claw 12 is at the operating angle position or at the standby angle position. In the tumbler lock, the second cam groove of the outer cylinder is added at an angle interval of 1 and 90 degrees.
[0018]
On the other hand, as shown in FIG. 3, an insertion hole 13 through which the locking claw 12 and the support shaft 11 at the operating angle position pass is opened at the tip of the connecting rod 2 in the thickness direction. ing.
[0019]
Further, a guide elongated hole 7 that is connected to the insertion hole 13 and slidably engages with the support shaft 11 is opened along the length direction of the connecting rod 2.
[0020]
On the other hand, as shown in FIG. 3 and FIG. 4, the opening end edge of the guide long hole 7, specifically, the opening end edge on the side facing the locking claw 12, is provided with a stop portion between the insertion hole 13. 14 is formed, and a locking groove 15 into which the locking claw 12 can be engaged is formed.
[0021]
As shown in FIG. 3, the locking groove 15 extends to the base end portion of the connecting rod 2 so that it does not interfere with the locking claw 12 even when the locking claw 12 is in the operating angle position.
[0022]
Further, a communication portion 16 through which the locking claw 12 can pass is formed in the form of a notch in the far side from the cylinder lock 9 among the pair of substantial portions that define the locking groove 15.
[0023]
The door guard with a lock according to one embodiment of the present invention configured as described above opens and closes the door using the connecting rod 2 that is tilted to the inner surface of the door by the elasticity of the connecting rod spring 8 when the door guard is not operated. Let
[0024]
In this case, the locking claw 12 may be in the operating angle position or in the standby angle position.
[0025]
On the other hand, when the door guard is operated, the key is inserted into the key hole of the support shaft 11 to unlock the cylinder lock, the support shaft 11 is turned and the locking claw 12 is placed at the operating angle position, and then the key is inserted from the key hole. Unplug.
[0026]
Then, when the door is exited and the door is closed from the outdoor side, as shown in FIG. 5, with the door still open, a connecting rod falling on the inner surface of the door is raised, and the insertion hole 13 at the tip thereof The tip end of the support shaft 11 is inserted through.
[0027]
When the door is closed a little in this state, the locking claw 12 is hooked on the portion of the back surface of the connecting rod 2 (as viewed from the cylinder lock 9) where the insertion hole 13 is not open. Is locked by the locking claw 12 and does not return to its original state.
[0028]
Then, when the door is closed in this state, as shown in FIG. 6, the locking claw 12 moves toward the base end while being in sliding contact with the back surface of the connecting rod 2.
[0029]
When the door is further closed, as shown in FIG. 7, the engaging claw 12 and the communicating portion 16 of the engaging groove are aligned. In this case, the connecting rod 2 is rotated clockwise by the elasticity of the connecting rod spring 8. The locking claw 12 is relatively engaged with the locking groove 15.
[0030]
In this state, the door is completely closed, and another cylinder lock attached to the door is locked to go out. In this case, as shown in FIG. 3, the locking claw 12 is in the locking groove 15 and is located at the base end portion thereof.
[0031]
For example, if the cylinder lock that is attached to the door is picked up by picking, for example, if the aim is empty, and you open the door happily with Shimeta, as shown in FIG. 3 and FIG. The claw 12 restrains the door at an open angle of a certain angle or less through the engagement with the stopper 14 of the locking groove and the connecting rod 2.
[0032]
In this case, in order to release the engagement between the locking claw 12 and the connecting rod 2, the door is temporarily closed, the locking claw 12 and the communication portion 16 are aligned, and in this state, the connecting rod 2 is moved in the urging direction. Needs to be rotated in the opposite direction to remove the locking claw 12 from the connecting rod, but this is impossible because the door is almost closed, and the cylinder lock 11 cannot be picked from a narrow gap. After all, the aim of the nest is repelled.
[0033]
In order to unlock the door guard after the housekeeper returns from the outside and unlocks the lock guard according to the present invention, the key is formed in the key hole of the support shaft 11 through the gap between the door and the door frame limited by the connecting rod 2. And turn it 90 degrees to remove the key.
[0034]
In this case, for example, the support shaft 11 is rotated 90 degrees counterclockwise in FIG. Then, as is apparent from FIG. 3, the locking claw 12 comes out of the locking groove 15 and the connecting rod 2 becomes free. In this way, the lock door guard is released.
[0035]
【The invention's effect】
As is apparent from the above description, in the present invention, a cylinder lock is fixed on the door frame side, and a locking claw is integrally projected on a support shaft integrally connected to the inner cylinder. A connecting rod is mounted on the inner surface of the free side edge portion so as to be rotatable in a horizontal plane, and this is biased in the direction in which the free end is close to the inner surface of the door, while the insertion hole is formed at the tip of the connecting rod. The formed guide long hole is opened along the length direction, and a stop is provided between the insertion hole and a locking groove having a communicating portion at the base end is formed at the opening edge of the guide long hole. When the door is closed, the connecting rod is raised to pass the support shaft through the insertion hole, and the locking claw protruding from the back side of the connecting rod when viewed from the cylinder lock is used to rotate the door and bias the connecting rod. Since it was introduced into the locking groove through the communication part, the door guard with lock can be operated from the outside with a simple structure. Cormorant achieve the desired effect.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a door opening showing an example of a conventional door guard.
FIG. 2 is a plan view of a lock door guard according to an embodiment of the present invention, showing a state where a connecting rod is raised.
FIG. 3 is a rear view of a lock door guard according to an embodiment of the present invention.
4 is a longitudinal sectional view of a connecting rod taken along line IV-IV in FIG. 3;
FIG. 5 is a partial cross-sectional bottom view for explaining the operation of the lock door guard, showing a state in which the support shaft is inserted into the insertion hole.
6 is a partially sectional bottom view similar to FIG. 5, showing a state in which the door is closed. FIG.
7 is a partially sectional bottom view similar to FIG. 6, showing a state in which the locking claw has been introduced into the locking groove. FIG.
8 is a partially sectional bottom view similar to FIG. 7, showing a state in which the door guard is operating. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 2 Connecting rod 3 Door frame 5 Receiving rod 6 Insertion part 7 Guide elongate hole 8 Coupling spring 9 Cylinder lock 11 Support shaft 12 Locking claw 13 Insertion hole 14 Stopping part 15 Locking groove 16 Communication part

Claims (1)

A flat block body, the width direction of which is vertical and the thickness direction is horizontal, and the base end is rotatably supported in a horizontal plane on the inner surface of the free side edge of the door, A connecting rod urged in a direction in which the free end is close to the inner surface of the door, a cylinder lock fixed to the door frame at the same height as the connecting rod so as to protrude indoors, and the cylinder lock A support shaft integrally and coaxially coupled to the inner cylinder, and a projecting projection projecting radially at the tip of the support shaft, and the operating angular position where the locking claw is vertical can be locked by a cylinder lock. And a through hole formed so as to pass through the free end of the connecting rod in the thickness direction and pass through the engaging claw at the operating angle position. Connected and opened along the longitudinal direction of the connecting rod so that it can slide with the spindle A guide long hole to be joined, a locking groove formed on the opening edge of the guide long hole, and a locking groove formed so that a locking claw can be engaged with the insertion hole being left. The locking groove is formed at the base end of the locking groove and has a width that allows the locking claw to pass through.When the door guard is activated, the cylinder lock is unlocked from the room side with the key, and the support shaft is turned to engage. When the pawl is placed at the operating angle position, the key is removed from the keyhole, and when the door is exited and the door is closed from the inside of the room, a connecting rod that falls on the inner surface of the door with the door still open is caused. Insert the tip of the spindle into the insertion hole at the tip, and then use the relative movement of the connecting rod and the supporting shaft when closing the door to bring the locking claw into sliding contact with the back of the connecting rod The locking claw and the communicating part of the locking groove are aligned by moving the door toward the door and further closing the door. Tablets with Door Guard, characterized in that as cause engaged into the locking groove locking pawl with.

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