JPH0412352B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a box lock provided on an entrance door,
This box lock has a dead bolt that can be used for final locking.
The present invention also relates to a box lock having a guard lever that can restrict the door from being fully opened.

[Conventional technology]

Conventionally, in this type of box locking device, there is a latch bolt for temporary locking that is unlocked by rotating a knob provided on the outside of the indoor door, and a cylinder lock provided on the outside of the door that is rotated. Or, it has a dead bolt that can be locked/unlocked by turning the knob on the indoor side.

As described above, in conventional box locks, the door is unlocked by rotating the knob from the indoor side, and then the latch bolt is unlocked by rotating the knob, and the door is released.
In addition, a box lock equipped with a security device is known as a means for restricting door opening in order to prevent theft (for example, Japanese Patent Laid-Open No. 190878/1983), but the structure is extremely complicated.

[Problem to be solved by the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a means for regulating the opening of a door with an extremely simple mechanism by providing a guard rod on the front surface of the case on the side of the door to be opened and closed.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a striker having a receiving hole for receiving a joint pin and a vertically elongated hole connected to the receiving hole on the striker side, and a striker on the box lock side that has a receiving hole for receiving a joint pin and a vertically elongated hole connected to the receiving hole. A guard rod is provided at one end of which is pivotally supported by a lock plate pin, and a joint pin attached to the other end is freely movable to move forward and backward, and an engaging piece is formed within the case body to move the joint pin of the guard rod back and forth. A dead bolt equipped with a sliding plate and a dead bolt plate that can be moved forward and backward from the front of the case, and a cylinder lock or knob between the dead bolt plate and the unlocked position. A hub is provided with a cam plate that can take a position and a neutral position, and a dead drive plate that switches the dead bolt between a forward position and a backward position.When the hub is set to a locked position, the sliding plate is moved forward and the cam plate is moved forward. This is characterized in that the dead drive plate and the dead bolt plate are actuated by this, and only the sliding plate is moved forward by setting the hub to the neutral position.

[Effect]

Since the hub, which rotates with the rotation of the cylinder lock or knob, slides the sliding plate, the tip of the sliding plate pushes the guard rod, which moves forward and backward and rotates.
One end of this guard lever is pivoted to the case body with a lock plate pin while being biased by a spring, and a joint pin is fixed to the other end of the guard lever, so when the guard lever is pushed, the joint pin When the striker is fitted into a receiving hole on the striker side fixed to the frame and the door is opened, the vertically elongated hole communicating with the receiving hole of the striker is used as a guide path to move upward and restrict opening of the door. Further, when the door is closed, the joint pin moves downward using the vertically elongated hole as a guide path and is positioned in the receiving hole.

In addition, when locking or unlocking a dead bolt, when the hub is rotated by operating the cylinder lock on the outdoor side or the knob on the indoor side, for example, when locking, the hub comes into contact with one end of the hub. When the dead drive plate is pushed against the spring by this hub, the dead bolt protrudes outside the case body and is locked.To unlock, rotate the hub in the opposite direction. The plate is moved back in the unlocking direction by the action of the spring urging it. At this time, the rear edge of the sliding plate is pushed while contacting one end of the return plate, so the other end of the return plate further presses the dead drive plate and rotates the dead drive plate.
Make sure to move the dead bolt backwards.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a longitudinal sectional view of the striker side A and the box lock side B.
Fig. 2 is a side view with parts of the fronts 1, 2 and second front 3 cut away and the lid body removed from the box lock B, and Fig. 2 shows the joint pin 6 with the guard lever pushed against the sliding plate. 3 is a side view showing the dead bolt 21 in the operating state shown in FIG. 2 and in the locked state of the dead bolt 21. FIG. FIG. 4 is an exploded perspective view of the striker side A and the box lock side B, and FIG. 5 is an explanatory view of the main part where the guard rod is connected to the striker side A.

In FIG. 1, the door (not shown) is fully opened, and the striker side A is fixed to the frame (not shown), and the striker 4 on the striker side A is attached to one end of the guard rod 5. A receiving hole 4' for receiving the joint pin 6 fixed to the seat and a vertically elongated hole 4'' connected to this receiving hole 4' are formed.When the door is opened and closed, the guard rod 5 operates, and this vertically elongated hole 4'' is used as a guide path. , the joint pin 6 moves in the vertical direction. That is, when the opening of the door is restricted, the joint pin 6 is located above the vertical hole 4'', and when the door is closed,
This joint pin 6 moves downward and the receiving hole 4'
It is located in Also, when you want to fully open the door, insert the joint pin 6 into the hub 7 through this receiving hole 4'.
When the sliding plate 10 is moved backward by the rotation, the spring 9 fitted to the lock plate pin 8 automatically moves it backward toward the box lock side B.

In this way, lock plate pins 8 are provided that penetrate through the fronts 1, 2 and second front 3, which are the front surfaces of the box lock side B, and the springs 9 are fitted to the lock plate pins 8. One end 5' of the guard rod 5 is fixed. Further, a flange 8' is formed on the lock plate pin 8 to prevent it from coming off. Further, a joint pin 6 is fixed to the other end of the guard rod 5. This guard rod 5 is always bent so as to retreat toward the box lock side B, and is made of an elastic material. An engaging piece 10' that is integrated with the sliding plate 10 that enters the rectangular hole 8'' formed in the guard rod 5 is provided at the tip. An inclined surface 10'' is formed at the tip of the joining piece 10'.

This sliding plate 10 is always urged in the projecting direction by the first coil spring 12. That is, one end 12a of this first coil spring 12
comes into contact with the upright piece 13 formed on the case body B',
The other end 12b is engaged with a bent piece 10a formed on the side edge of the sliding plate 10 (see FIGS. 2 and 3). Therefore, it is always biased in the direction of arrow A (see FIG. 1).

In FIG. 1, the sliding plate 10 is retracted into the case body B'. At this time, a hub in which a square shaft (not shown) that connects a cylinder lock (not shown) and a knob (not shown) is inserted through a bent portion 10b formed at the rear end of the sliding plate 10. Abut one end 7a of 7,
A first coil spring 12 that biases the sliding plate 10
The retracted position is maintained until the cylinder lock or knob is rotated against the This first coil spring 12 is fitted onto a pin 14 installed in the case body B'. In order to ensure the rotational position of the hub 7, one end 15a of the second coil spring 15 is brought into contact with the hub 7, and the other end 15b is brought into contact with the hub 7.
is in contact with the wall of the case body B'. This second coil spring 15 is fitted into an upright piece 16 of the case body B'.

Further, the cam plate 7b fitted to the hub 7 is arranged at a position where it comes into contact with a rotatable dead drive plate 18, and this dead drive plate 18
The third coil spring 17 fitted to the support shaft 19 of
A pin 20 has one end 17a in contact with the hub 7 and the other end 17b embedded in the dead drive plate 18.
This third coil spring 1
The biasing force 7 rotates the dead drive plate 18 counterclockwise.

Also, since the pin 20 of the dead drive plate 18 is engaged in the notch hole 22a of the dead bolt plate 22 fixed to the rear end of the dead bolt 21, the cam plate 7b fitted to the hub 7 can be inserted into the dead bolt plate 22. Unless the drive plate 18 is pushed, the dead bolt 21
It is held in the unlocked position by the biasing action of.

FIG. 2 is an operating state diagram in which opening of a door (not shown) is restricted. The hub 7, which is rotated by a cylinder lock or knob, is in a neutral position, and the sliding plate 10 is slid by the bias of the first coil spring 12.
The engaging piece 10' of the sliding plate 10 pushes the guard rod 5 while entering the hole 8'', and the joint pin 6 provided at the end of the guard rod 5 fits into the receiving hole 4' of the striker 4. When the door is opened in this fitted state, as shown in Figure 5, the joint pin 6 uses the vertically long hole 4'' as a guide path, so it rises while rotating around the lock plate pin 8. . Therefore, the door can be opened by the length of the guard rod 5.

FIG. 3 is an operating state diagram in which the guard rod 5 and the dead bolt 21 have entered the striker 4, and in this state the door is locked and cannot be opened. When the rotational position of the hub 7 in FIG.
8 and rotates this dead drive plate 18 clockwise, this dead drive plate 18 presses against the notch 22a of the dead bolt plate 22 of the dead bolt 21 while resisting the third coil spring 17. The dead bolt 21 is advanced in the locking direction by the pin 20 that is engaged.

Further, when the hub 7 is reversed as shown in FIG. 1, the sliding plate 10 is moved backward by the hub 7, and
Since the bent portion 10b of the sliding plate 10 pushes one end 23a of the return plate 23, the return plate 23 is rotated about the support shaft 24.
Furthermore, the other end 23b of this return plate 23
pushes the dead drive plate 18, so
This dead drive plate 18 ensures that the dead bolt 21 can be retracted to the unlocked position.

〔Effect of the invention〕

The present invention employs a structure in which a guard rod is arranged so as to be able to move forward and backward and rotate freely on the front of the case on the side of the door that is opened and closed, so that on the striker side there is a receiving hole that receives and guides the joint pin, and a straight line connected to the receiving hole. It has the advantage of having a simple configuration with a vertically elongated hole, and by setting the hub in the neutral position, the door can be opened smoothly to a predetermined position using the guard lever.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Figures 1 to 3 are side views of the striker side and the box lock side, Figure 4 is an exploded perspective view of Figure 1, and Figure 5 shows the door being restricted from opening. This figure represents an operating state diagram. A...Striker side, B...Box lock side, 1, 2...
...front, 4...strike, 5...guard,
6... Joint pin, 7... Hub, 10... Sliding plate, 12... First coil spring, 15...
Second coil spring, 17...Third coil spring, 18...Dead drive plate, 21
...Detsudo bolt, 22...Detsudo bolt plate.

Claims (1)

[Scope of Claims] 1. On the striker side, a striker is provided with a receiving hole for receiving a joint pin and a vertically elongated hole connected to the receiving hole, and on the box lock side, a locking plate is provided at one end on the front surface of the case body. A guard lever is provided which is pivotably supported by a pin and allows a joint pin attached to the other end to freely move forward and backward and rotate, and inside the case body is a sliding plate formed with an engaging piece for moving the joint pin of the guard lever forward and backward. ,
A dead bolt is equipped with a dead bolt plate that can be moved forward and backward from the front of the case, and between the sliding plate and the dead bolt plate, an unlocked position, a locked position, and a neutral position can be set using a cylinder lock or knob. A hub equipped with a sliding cam plate and a dead drive plate for switching the dead bolt between a forward position and a backward position are provided, and when the hub is set to a locked position, the sliding plate is moved forward, and the cam plate moves the dead drive plate, A box lock characterized in that only the sliding plate is moved forward by activating the dead bolt plate and setting the hub to a neutral position.