JPH0529322Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a box lock installed on an entrance door, etc.
Specifically, the present invention relates to a box lock that can use either a guard lever to restrict the door from fully opening or a dead bolt to fully lock the door by selecting the direction of rotation of the hub.

[Prior Art] Conventionally, this type of box locking device not only permanently locks the door, but also has a guard that prevents theft by restricting the opening of the door so that it is not fully opened even when the door is unlocked. I have something prepared.

As such a box lock, for example, Japanese Patent Application Laid-Open No. 62-50573
There is a technology described in the publication.

In other words, the locking operation is carried out by rotating the cylinder lock or knob, so that the guard rod first fits into the striker hole, and when the door is opened, the guard rod moves along the vertical hole connected to the striker hole. The safety lock is activated to prevent the door from opening.

When the striker is rotated further, the dead bolt fits into the engagement hole provided in the striker, resulting in the fully locked state.

Therefore, in order to fully lock the door, the guard rod must enter the striker each time.

However, the security lock is not required for normal door locking and unlocking, and the security lock is changed from the regular lock to the security lever only when checking for visitors.

[Problem that the invention attempts to solve]

It is desirable that the locking/unlocking operation be performed as simply as possible, and it is convenient to lock and unlock the door without operating the guard lever and to lock the guard lever only when it is necessary to lock the guard lever.

The present invention has been made with attention to this point.

[Means for solving problems]

The present invention has a lock plate pin at one end that engages with a receiving hole provided in the striker and a vertical hole connected to the receiving hole, and is pivotally attached to the front so that it can move forward and backward and rotate freely, and is attached with a spring on the case body side. A lock plate that is pushed forward, a double cam that is fitted into the hub and has a protrusion at its tip, a cam lever that is pressed by the protrusion and rotates to push the push plate forward, and a cam lever that is pushed by the cam lever and moves forward. The lock plate is provided with a push plate that pushes the lock plate toward the front of the case body when the lock plate is pressed, and a dead drive plate that rotates against the spring when pressed by the protrusion and pushes the dead bolt in the locking direction.

[Effect]

(Locking with a guard rod) When the double cam is rotated in one direction by the hub and the cam lever is pressed, the cam lever pushes the push plate forward, and the lock plate pushed by the forward movement of the push plate rotates from the front. When the lock plate protrudes, the lock plate pin provided at one end of the lock plate engages in the receiving hole of the striker and becomes locked, but the dead drive plate is not affected by the protrusion, so the dead bolt is It doesn't work.

(Final lock) When the double cam is rotated in the other direction by the hub,
The protrusion hits the dead drive plate, and the dead drive plate rotates against the spring pressure, pushing the dead bolt and protruding it to become fully locked, but the protrusion does not hit the cam lever, so the lock plate is pushed out. The guard remains unlocked.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side view of the lock box with parts of the front 1, 2 and second front 3 cut away and the lid removed from the lock, showing a state in which the door can be fully opened.

A hole 4 is provided in the front 2 and the second front 3, and a small diameter portion 6a of a lock plate pin 6 fixed to one end of a lock plate 5 is loosely fitted into the hole 4 so as to be freely rotatable and move forward and backward with respect to the hole 4. Ru.

A spring 7 wound around the small diameter portion 6a is provided between the large diameter portion 6b of the lock plate pin 6 and the second front 3.
is biased in the direction of sinking.

At the other end of the lock plate 5 is a joint pin 8.
is fixed.

The joint pin 8 has a flange 8b at the tip of the shaft 8a.
A receiving hole 9 with a larger diameter than the flange 8b is provided at a position facing the joint pin 8 of the striker A, and above the receiving hole 9, the receiving hole 9 has a width smaller than the flange 8b and larger than the shaft 8a. A series of vertically elongated holes 10 are provided.

A double cam 12 that is fitted into a hub is pivotally attached to a side wall 11a of a case body 11 of the box lock.

The double cam 12 has a cam surface 13 having an outwardly projecting protrusion 13a and a side wall 1 formed in a substantially square shape.
4, and one end of a spring 16 fitted into a pin 15 implanted in the side wall 11a of the case body 11 presses the side wall 14.

Therefore, the posture of the double cam 12 is kept stable when the spring 16 is in close contact with the side wall 14.

Above the double cam 12, a cam lever 1 is connected to a pin 17 implanted in the side wall 11a of the case body 11.
8, and when the double cam 12 is rotated 90 degrees clockwise, the protrusion 13a as shown in FIG.
rotates the cam lever 18 counterclockwise, and the cam lever 18 presses the bent portion 19a of the push plate 19.

The push plate 19 has two rectangular long holes 20 and 21, and the long holes 20 and 21 have upright pieces 22 and 2 cut up from the case body 11.
3 are fitted in, respectively, and restrict the movement direction of the push plate 19 in the front-rear direction (left-right direction in the drawing).

An engaging piece 24 extends from the front end of the push plate 19, and a hole 25 is provided in the front 2 so that the engaging piece 24 does not interfere with the front 2.

Therefore, when the push plate 19 moves forward, the engaging piece 24 passes through the hole 25 in the front 2 and presses the lock plate 5, so that the lock plate 5 supports the lock plate pin 6 as a fulcrum, as shown in FIG. It protrudes forward and rotates.

Below the double cam 12, a dead drive plate 27 is pivotally attached to a support shaft 26 installed on the side wall 11a of the case body 11, and a spring 31 is fitted.

The dead drive plate 27 is provided with a dead drive pin 28 at one end, and the dead drive pin 28 is connected to a notch 30 formed in the dead bolt 29.
inserted into.

Therefore, the dead drive plate 27
6 as a fulcrum, the dead drive pin 28 pushes the dead bolt 29 forward, and the tip of the dead bolt 29 fits into the hole 31 provided in the striker A.

Locking and unlocking of the box lock configured as described above will be explained.

In FIG. 1, the double cam 12 is kept in a stable position because its side wall is in close contact with the spring 16.
The protrusion 13a is not in contact with either the cam lever 18 or the dead drive plate 27.

Therefore, the lock plate 5 is urged toward the case body 11 by the spring 7 and comes into contact with the front 2.
The joint pin 8 is separated from the striker A, and the guard lever is in an unlocked state.

As the lock plate 5 retreats, the engagement piece 24 is pushed rearward, and the push plate 19 is in the retreat position.

On the other hand, the dead bolt is retracted by the spring 31 fitted into the support shaft 26, and the tip of the dead bolt is spaced apart from the striker, so the door is in an unlocked state.

From this state, rotate the double cam 12 clockwise.
When rotated 90 degrees, the side wall 14 comes into contact with the spring 16 again and remains stable, and the protrusion 13a presses the cam lever 18, which rotates counterclockwise about the pin 17 and pushes the push plate. Push 19 forward.

As the push plate 19 moves forward, the engagement piece 2
4 passes through the hole 25 and presses the lock plate 5, and the joint pin 8 is inserted into the receiving hole 9 of the striker A.

At this time, since the dead drive plate 27 is not subjected to external force, the dead bolt 29 is maintained in the retracted position.

In this state, when the door is opened, the joint pin 8 rises in the vertically elongated hole 10 as the door rotates, and the degree of opening of the door is limited by the length of the lock plate 5 that engages with the striker A.

As described above, the door is prevented from theft by locking the guard lever.

To return to the unlocked state, close the door and rotate the double cam 12 90 degrees counterclockwise, and the spring 7 will cause the push plate 19 to retreat.

Next, when the double cam is rotated 90 degrees counterclockwise from the state shown in FIG. 1, as shown in FIG. drive plate 2
7, the dead drive plate 27 rotates clockwise around the support shaft 26, and the notch groove 30
The dead drive pin 28, which is engaged with the dead bolt 29, presses the dead bolt 29 toward the striker A, and the dead bolt 29 moves forward against the spring 31, and its tip fits into the hole 31 of the striker A, and the door is finally locked.

At this time, the cam lever 18 is not pressed by the protrusion 13a, so the guard lever does not operate.

To return to the unlocked state, when the double cam 12 is rotated 90 degrees clockwise, the dead bolt 29 is moved back by the spring 31.

〔effect〕

The box lock of this invention can lock the guard lever by rotating the hub clockwise only when necessary, and can normally be locked by rotating the hub counterclockwise without operating the guard lever. Since it can be locked, it has the advantage of being easy to lock and unlock.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, and FIG. 1 is a partially sectional side view of the box lock in the unlocked state, and FIG.
The figure is a partially sectional side view of the box lock in the precautionary lever locked state, and FIG. 3 is a partially sectional side view of the box lock in the fully locked state. A...Striker, 1, 2...Front, 3...
...Second front, 5...Lock plate, 6
... Lock plate pin, 7 ... Spring, 8 ... Joint pin, 9 ... Receiving hole, 10 ... Vertical hole, 1
1...Case body, 12...Double cam, 13a
...Protrusion, 14...Side wall, 16...Spring, 18...
...Cam lever, 19...Push plate, 24
...Engagement piece, 27...Dead drive plate,
28...Dead drive pin, 29...Dead bolt, 30...Notch groove, 31...Spring.

Claims (1)

[Scope of utility model registration request] A striker having a receiving hole and a vertically elongated hole connected to the receiving hole formed on the front surface, a case body of the box lock, and a lock plate pin pivotably attached to the front surface of the case body so as to be movable and rotatable. a lock plate which has a joint pin at one end that can be engaged with the receiving hole and the longitudinal hole at the other end and which is biased by a spring toward the case body; a double cam that is fitted into the hub and has a protrusion at its tip; A cam lever that rotates when pressed by the protrusion, a push plate that moves forward when pressed by the cam lever and pushes the lock plate forward of the case body, and a push plate that rotates against the spring when pressed by the protrusion. and a dead drive plate that pushes out the dead bolt in the locking direction, and either the cam lever or the dead drive plate is pressed against the protrusion depending on the rotating direction of the double cam. Tablet.