JPS588833Y2 - Dead bolt safety device in locks - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety device for a threaded bolt in a lock.

Conventional safety devices of this type of deadbolt require a separate release operation in addition to the unlocking operation in order to release the safety device, so unlocking the door is complicated.

On the other hand, in order to eliminate such complications when unlocking, a method is also used in which a trigger bolt is provided in addition to the dead bolt, and the dead bolt and trigger bolt are linked to lock and unlock the lock and simultaneously release the safety device with a single operation. ing.

However, with this method, if the gap between the door and the frame becomes too large, the safety device may not be released.

Furthermore, as in Japanese Patent Application Laid-Open No. 49-55498 (A), a device in which the deadbolt is retracted and retracted by the hub and at the same time locks or releases the lock lever (lock lever 42 in the A) with the deadbolt is also known. However, the problem with the instep is that there is a lot of resistance when the hub rotates.

The detailed reason will be described later.

The present invention aims to solve the problems of the conventional deadbolt safety device.

That is, in the present invention, as described below, a locking step 7 is provided on the deadbolt 1, and a lever 9 operated by an operating arm 8 of the hub 2 is rotatably supported on a shaft 11, so that the locking step 7 is provided on the deadbolt 1, and a lever 9 operated by an operating arm 8 of the hub 2 is rotatably supported on a shaft 11. Unlock the locking lever 4 that is locked to the stepped portion 7 and lever 9
The locking lever 4 is easily and quickly released from the deadbolt 1.

By adopting such a configuration, an attempt has been made to provide a deadbolt safety device that allows the locking operation to be performed in a single operation and improves safety.

The embodiments shown in the drawings will be described below.

(1) Figure 1 shows the locked state with the deadbolt 1 protruding.

In FIG. 1, the tied bolt 1 is inserted into the lock case 3 so as to be freely retractable by rotating the hub 20. As shown in FIG.

Reference numeral 4 denotes a locking lever, which is pivotally supported by a pivot shaft 5 fixed to the lock case 3.

The locking lever 4 is urged toward the deadbolt 1 by a spring 6 wound around the pivot shaft 5, and its tip is locked in a locking step 7 of the deadbolt 1.

In this way, the deadbolt 1 is prevented from being pushed into the lock case 3.

9 is supported by a lever on a pivot shaft 11, and is biased toward the hub 2 by a spring 10 wound around the pivot shaft 11, and in the state shown in FIG. It is in contact with the actuating arm 8.

(2) When unlocking, rotate the hub 2 by rotating the key or thumb turn, and rotate the operating arm 8 of the hub 2.
moves within the notch 12 of the deadbolt 1.

While the operating arm 8 moves within the notch 12, it presses the rear end side of the lever 9 and pushes the lever down against the spring 10 with the pivot shaft 11 as a fulcrum.

This state is shown in FIG.

When the rear end side of the lever 9 is pushed down, the front end side pushes up the locking lever 4 about the pivot shaft 5, and the locking lever 4
and the locking step portion 7 are disengaged.

Furthermore, as the hub 2 rotates, the bolt 1
is inserted into the lock case 3 as shown in FIG.

In the state shown in FIG. 3, the lever 9 returns to its original position due to the bias of the spring 10, and the tip of the locking lever 4 comes into contact with the upper surface of the deadbolt 1 due to the bias of the spring 6.

(3) When locking, the deadbolt 1 is locked with the locking lever 4.
When the locking step 7 reaches the tip of the locking lever 4, the locking lever 4 locks on the locking step 7.

Effects of the present invention For example, as in JP-A No. 49-55498 (A), when the operating arm (pin 50 in the A) that is directly attached to the hub operates the locking lever (the lock rod 42 in the A), the lock 42 is activated. The moving distance is large, the resistance to the hub is large, and the rotational force varies over time.

In this regard, in the present invention, when unlocking, the lever 9 is first swung by the operating arm 8 of the hub 2, and the lever 9 releases the locking lever 4 from the deadbolt 1, so the locking lever 4 may be moved by slightly moving up and down the stepped portion 7 of the deadbolt 1.

Therefore, the rotation distance of the knob 2 is extremely small, and the rotation is light.

[Brief explanation of drawings]

Figure 1 is a front sectional view of the device of the present invention when the device is locked, Figure 2 is a front sectional view showing the state immediately before the transition from locking to unlocking, and Figure 3 is a front sectional view of the device when unlocking. figure. 1...Dead bolt, 2...Hub, 3
...Lock case, 4...Locking lever, 5
... Pivot shaft, 6 ... Spring, 7 ...
... Locking step, 8 ... Actuation arm, 9 ...
...Lever, 10...Spring, 11...Pivot, 12...Notch.

Claims (1)

[Claims for Utility Model Registration] A locking step 7 is provided on the threaded bolt 1, and when the lock is closed, the tip of the locking lever 4, which is pivotally supported on the pivot shaft 5 of the lock case 3, touches the locking step 7. In the deadbolt safety device in the lock to be engaged, the actuating arm 8 of the hub 2 is centered within the notch 12 of the deadbolt 1 about the pivot shaft 11 provided in the deadbolt 1.
A lever 9 is provided which is swung by the lock and is energized toward the hub 2 side, and when the lock is closed, the front end of the lever 9 is the lower surface of the locking lever 4 that is engaged with the locking step 7 of the deadbolt 1. When the lock is unlocked, as the hub 2 rotates, the operating arm 8 swings the lever 9 at its rear end against the urging force toward the hub 2, thereby locking the locking lever 4. A safety device for a deadbolt in a lock, characterized in that the engagement with the locking step 7 is released.