JPH068221Y2 - Door locking device - Google Patents

Description

[Detailed Description of the Invention] "Industrial field of application" The present invention relates to a door locking device, and in particular, it is attached to the open side end of a door such as a mail box installed at the entrance of a condominium or a detached house. The present invention relates to a door locking device.

"Prior art" Conventionally, letters and important documents are put in a mailbox, etc. Generally, a hole is formed in the lower part of the handle of the door, and the opening edge of the box body is formed to correspond to this hole. An inverted U-shaped lock arm of a padlock is passed through the hole and the opening / closing door cannot be forcibly opened.

By the way, even if a padlock can be attached to a mailbox, the padlock is not locked in a mailbox because it is generally troublesome in private life.
As a rule of thumb, it is rare to hang a padlock.

However, as a practical matter, not only letters but also important documents are put in a mailbox, so that it cannot be said that the opening and closing door is easily opened.

Therefore, in recent years, even in the case of a mail box installed at the entrance of a condominium or a detached house, even if relatively important documents are put into the mail box, the opening / closing door cannot be easily opened, and There is a demand for the appearance of a door locking device that can completely lock the open / close door using a padlock if desired.

"Problems to be solved by the present invention" The present invention has been made in view of the above-mentioned conventional techniques and demands.
When a person using a mail box, etc. thinks that the door is temporarily locked when it is sufficient, it can be easily put in that state, and because relatively important documents are often inserted, the door should always be kept in a book. When it is desired to maintain the locked state, a padlock can be used to maintain the locked state, and further there is provided a door locking device which is easy to lock and unlock.

"Means for Solving Problems" A door locking device of the present invention has an outer cylinder member having a guide groove) in the outer cylinder part and fixedly attached to the door, and a rear end of the outer cylinder member. And a latch mechanism having a latch plate that is integrally provided on the column and rotatable on a column, and the outer cylinder member that restricts the rotation of the latch plate of the latch mechanism and can be temporarily locked. A knob rotating member in which an inner cylinder portion having a guide notch portion is fitted and a regulation plate having a relief notch portion is integrally provided in the inner cylinder portion, and slidable in a center hole of the knob rotating member. And a locking hole formed at the front end thereof, and the rear end of which integrally has a hook for engaging with the guide notch and the guide groove to bring the lock into a locked state, and the middle shaft. A padlock having a lock arm attached to the locking hole and locking the central shaft. Is characterized by.

"Embodiment of the Invention" Hereinafter, the invention will be described in detail with reference to an embodiment shown in the drawings.

In the embodiment shown in FIGS. 1 to 4, X is a locking device attached to the door a of the mail box Y installed at the entrance of a condominium or a detached house.

That is, 1 is an outer cylinder member fixed to the open end of the door a of the mail box Y by a fastener such as a screw, and the outer cylinder member 1 has a fitting portion 1a formed at the front end thereof. An outer cylinder portion 1b is formed on the rear end side so as to penetrate through a mounting hole formed in the door a, and a mounting flange that abuts the front surface of the door a between the outer cylinder portion 1b and the fitting portion 1a. 1c is formed, and a guide groove 2 is axially formed on the inner wall of the outer cylindrical portion 1b.

Reference numeral 3 denotes a latch mechanism integrally provided on the outer cylinder portion 1b of the outer cylinder member 1. The latch mechanism 3 is disengaged from a stopper piece d fixedly provided on the inner side wall c of the door a at the upper portion thereof. Engagement part 4
On the other hand, a has a latch plate 4 in which a long hole 4b is formed in the central portion in the vertical direction, and the latch plate 4 is vertically moved and rotated by a pivot pin 6 on a columnar body 5 of a substantially columnar or prismatic shape. The guide plate is mounted movably on the pillar body 5 so that the latch plate 4 can move up and down in the vertical direction, and the latch plate 4 moves downwards or communicates with the guide cutout 5a and rotates in one direction. And a storage portion 5b for storing the coil spring 7 for urging the tilted latch plate to its original vertical state when it is moved.

Reference numeral 8 denotes a knob rotation member rotatably provided on the outer cylinder member 1 so that the movement of the latch plate 4 of the latch mechanism 3 can be restricted and temporarily locked. A knob 10 having a hole 9 and a fitting recess formed on the rear side for fitting with the fitting portion 1a and the mounting flange portion 1c of the outer cylinder member described above; and a knob 10 provided integrally with the knob 10. Outer cylinder member 1
A regulation in which an inner cylinder portion 11 to be inserted into the inner cylinder portion 11 and a relief cutout portion 12a for releasing the regulation of the latch plate 4 of the latch mechanism 3 are fixed to the insertion end surface of the inner cylinder portion 11 by a fastener such as a screw. A guide notch 13 is formed in the inner cylinder portion 11 in the axial direction.

In the present embodiment, the thickness of the restriction plate 12 is made thin, and a similar notch for relief is also formed at the rear end of the inner cylindrical portion 11 corresponding to the notch 12a for relief. The thickness and form of the regulation plate 12 can be arbitrarily changed in design.

Reference numeral 14 denotes an inner shaft that is inserted into or retracted from the knob rotating member 8 or is slidably fitted therein. A knob portion 14a having a diameter larger than that of the center hole 9 is formed at the front end portion of the inner shaft 14, and the knob portion 14a is close to A locking hole 15 in a penetrating state is formed at the portion of the above, and a guide groove 2 and a knob rotating member 8 for guiding the outer cylinder member 1 described above when the center shaft 14 is pulled out at the rear end of the center shaft 14. A hook 16 is integrally provided which is guided by the notch portion 13 so as to prevent the knob rotating member 8 from rotating with respect to the outer cylinder member 1 and which is in a locked state. In the present embodiment, 17 is a spring member such as a coil spring which is installed in the guide notch 13 of the knob rotating member 8 and whose rear end surface abuts on the front surface of the hook 16 so as to constantly urge the center shaft 14 inward. is there.

In the above structure, first, when the locking device X is in the unlocked state, the center shaft 14 enters into the knob rotating member 8 except the knob portion 14a by the spring force of the spring member 17, and the knob rotating member 8 8 is freely rotated, for example, 90 degrees so that the relief notch 12a of the regulation plate 12 and the lower portion of the latch plate 4 face each other. In this case, when the door a of the mail box Y is about to be opened, the latch plate 4 that is in abutting engagement with the stopper piece d of the door a rotates in the hour hand direction against the spring force of the coil spring 7. The lower part thereof enters the relief notch 12a, and therefore,
As shown in FIG. 1, the engaging portion 4a of the latch plate 4 is freely released from the stopper piece d of the door a, and the door a can be opened.

Since the door a is opened even a little in FIG. 1, it is accurate to show the locking device X and the like in a perspective view, but it is shown in a schematic explanatory view for convenience of explanation.

Next, the door a is opened and the latch plate 4 released from the engagement with the stopper piece d is returned to the vertical state as shown in FIG. 2 by the spring force of the coil spring 7. And the door a
When the door is closed, the latch plate 4 comes into contact with the stopper piece d of the door a again, but the latch plate of this embodiment has the upper tapered surface 4
When c slides against the stopper piece d, it moves downward against the spring force of the coil spring 7, so that the door a can be closed without any trouble.

When the door is closed, the door is in the unlocked state as it is. Therefore, if the knob rotating member 8 is arbitrarily turned, the relief notch 12a of the regulating plate 12 and the lower portion of the latch plate 4 are temporarily locked. Become.

However, when this temporary locking is not enough and the door a is desired to be completely locked, the center shaft 14 is pulled out to the position shown by the phantom line in FIG. 2 against the spring force of the spring member 17, and the hook 16 is pulled out. 1
Guide groove 2 of. Then, the tab 16 brings the knob rotation member 8 into the locked state so as not to rotate with respect to the outer cylinder member 1. Therefore, when the inverted U-shaped lock arm 21 of the padlock 20 is passed through the locking hole 15 of the center shaft 14 and locked as shown in FIG. 3, the center shaft 14 can return to the inside of the knob rotating member 8. As a result, the locked state can be completely maintained.

"Effects of the Invention" As is apparent from the above description, the invention has the following effects.

(1) Only by rotating the knob turning member, movement of the latch plate of the latch mechanism can be restricted, and the temporary locking can be easily performed.

Therefore, even if a mailman forcibly puts a document in a mail box temporarily locked on the door, the door does not open due to the action.

(2) When the main lock is performed, the central lock is pulled out from the rotating member to establish the main lock state and the lock hole is exposed, so that the lock arm of the padlock can be easily inserted.

(3) If a padlock is attached to the locking hole of the center shaft, the center shaft is restricted from moving inward and the locked state can be maintained, so it is safe even if important documents are put in a mailbox or the like.

(4) When the padlock is removed from the central shaft, the central shaft immediately enters the temporarily locked state due to the spring force of the spring member, so that the unlocking operation is easy.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view when opening a door in an unlocked state showing an embodiment of the present invention, FIG. 2 is a schematic explanatory view of a temporary locking of the present invention, and FIG. 3 is a state of the present locking of the present invention. FIG. 4 is a schematic explanatory view in which a padlock is attached to the center shaft, and FIG. 4 is a schematic exploded perspective view of each member constituting the present invention. X ... Locking device, Y ... Post box, a ... Door, b ... Stopper piece, 1 ... External cylinder member, 2 ... Guide groove, 3 ... Latch mechanism, 4 ... Latch plate, 8 ... Picking rotating member, 12 ... Regulation Plate, 12a ... Notch for relief, 13 ... Guide notch, 14 ... Center shaft, 15 ... Locking hole, 16 ... Tsuku, 17 ... Spring member, 20 ... Padlock.

Claims (2)

[Scope of utility model registration request] 1. An outer cylinder member (1) having a guide groove (2) in an outer cylinder part (1b) and fixedly attached to a door, and integrally provided at a rear end of the outer cylinder member. A latch mechanism (3) having a latch plate (4) rotatable on the pillar (5) and the outer latch so that the latch plate of the latch mechanism can be locked and temporarily locked. Guide notch (1
A knob rotating member (8) in which an inner cylinder portion (11) having the above-mentioned 3) is fitted and a regulating plate (12) having a relief notch (12a) is integrally provided in the inner cylinder portion; The knob rotation member is slidably fitted in the central hole (9) and has a locking hole (15) formed at the front end, and the guide notch (13) and the guide groove (2) at the rear end. ) To integrally lock the central shaft (1)
4) and a lock arm (21) in the locking hole of the center shaft.
A door locking device comprising a padlock (20) to which is attached and which locks the central shaft. 2. The door locking device according to claim 1, wherein the center shaft (14) is constantly urged inward by a spring member (17).