JPH0425892Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Purpose of the invention (field of industrial application) This invention relates to a locking device suitable for use on doors, especially bellows-type doors.

(Prior art and issues to be solved) Bellows-type doors are often used for windows and doors in garages and warehouses, but when opening the locking device of this type of door electrically, the locking device It was common for the door to be electrically unlocked, energized while the door was open, and then de-energized after the door was closed and locked again.

As described above, since electricity is applied for a relatively long period of time, there are drawbacks such as not only a loss of power but also damage to the equipment.

The present invention was developed in order to deal with this situation, and when opening the door in this type of door locking device, the current is applied only for a short period of time during the initial period of unlocking the lock, thereby shortening the energization time. The object of the present invention is to provide a locking device that prevents power loss and equipment wear and tear and enables stable operation over a long period of time.

(2) Structure of the invention (technical means for solving the problem, and its operation) In order to achieve the above object, the present invention uses a cylinder located close to the guide rail of the door that moves to open and close, and a locking device that is connected to the door. a solenoid fixedly disposed within the cylinder, a plunger elastically biased to a position away from the solenoid when initially deenergized and displaced by energization of the solenoid; a microswitch that causes the plunger to deenergize the solenoid after a short period of time after the solenoid is energized; a spring that elastically engages the plunger and prevents its movement when the solenoid is deenergized; When the lock is locked, it is engaged with the dead bolt and the plunger which is in the initially de-energized position to prevent the dead bolt from moving, and when the lock is unlocked, it is rotated to engage the spring. A cam is disposed that allows the plunger to disengage from the plunger and move the plunger to its original deactivated position, and is further rotatable to a locked position by displacement of the dead bolt. It is something.

With this configuration, in a lock device that opens and closes a door by energizing a solenoid, with a simple configuration, the energization time can be minimized, reducing power loss and prolonging the life of parts. can be measured.

(Explanation of Examples) Fig. 1 is a side sectional view of the main parts of a locking device showing an embodiment of the present invention, and the figure shows a state in which the door is closed, and reference numeral 13 indicates a lock device attached to the door side. When the dead bolt is in the closed position shown, it is located at the bottom of the drawing. A guide rail (not shown) is installed on the side of the door.
A cylinder 1 having a square cross section is fixed to this.

A solenoid 5 is installed in the cylinder, and a plunger 2 is disposed below the solenoid 5 so as to be able to slide inside the cylinder. A spring 6 is disposed between the plunger 2 and the plunger 2 to constantly bias the plunger 2 downward in the drawing.

Above the solenoid 5 in the drawing is a movable contact 8.
and a fixed contact 8'.
is attached, and both contacts are separated in the closed state shown.

One end of a spring 10 provided in the cylinder 1 is engaged with the inner wall of a hollow bulge formed below the plunger 2, and a pin A is rotated into an opening 14 formed in the cylinder 1. A freely mounted rocking cam 9 is provided, one cam surface 12'' of the cam 9 engaging the dead bolt 13.

Further, the cam surface 12 of the cam 9 is locked to the plunger 2 to prevent the cam 9 from rotating in the clockwise direction,
Further, together with the cam surface 12'', the dead bolt 13 is prevented from being displaced, and the cam surface 12' abuts against the lower end of the plunger 2 to secure its position.

Figure 2 shows the initial stage of opening the door.
First, when the solenoid is energized, the plunger 2 rises against the action of the spring 6, and the lower bulge of the plunger disengages from the cam surface 12 of the cam 9. At this time, when the door is raised, the dead bolt 1
3 also rises, and at the same time, the cam 9 also rotates to take the position shown in the figure, and the dead bolt becomes able to rise further and the door can be opened.

At this time, the spring 10 is engaged with the bulge of the plunger 2, and the contacts 8, 8' of the micro switch
are not in contact.

If the solenoid continues to be energized, the plunger rod 3 will also rise further to bring the contacts 8 and 8' into contact, activating the micro switch 7 and stopping the energization to the solenoid 5. At this time, the spring 1
The top of the plunger 2 engages the bottom of the plunger 2 to maintain it in its raised position, continuing to operate the microswitch 7 and preventing the solenoid 5 from being energized.

In this way, it is possible to energize the solenoid only at the initial stage of opening the door, and then open the door with the solenoid in a non-energized state.

When closing the door, when the cam 9 is rotated clockwise from the state shown in FIG. 3 and brought to the position shown in FIG. It rotates and disengages from the plunger 2, resulting in the state shown in the figure.

When the door is closed in this state, the dead bolt 13 will also be lowered by moving it downward as shown in the figure, the cam 9 will be rotated counterclockwise as shown in the figure, and the plunger 2 will be in the state shown in Fig. 1. The dead bolt 13 is in the locked position, and the dead bolt 13 cannot be moved, as in the case described above, and is locked.

(3) Effects of the invention As explained above, when using the invention, there is no need to energize a door that opens after being unlocked by energizing the solenoid during the opening time.
To obtain a locking device which can greatly reduce power loss and equipment wear and tear while maintaining door locking and door opening functions, and which can perform stable operations over a long period of time.

[Brief explanation of the drawing]

The attached drawings are side sectional views showing an embodiment of the present invention, in which Fig. 1 shows the closed state, Fig. 2 shows the state at the initial stage of opening the door, and Fig. 3 shows the non-energized state during the subsequent opening operation. are shown respectively. 1... Cylinder, 2... Plunger, 3... Plunger rod, 5... Solenoid, 6... Spring, 7... Micro switch, 9... Rocking cam,
10...Spring, 11...Protrusion, 12, 12', 1
2″…cam surface, 13…dead bolt.

Claims (1)

[Scope of utility model registration request] A cylinder is provided with a cylinder disposed close to the guide rail of a door that moves to open and close, and a dead bolt provided on the door, and a solenoid fixedly disposed within the cylinder and elastically biased to a position away from the solenoid when initially deenergized. a plunger which is displaced by the energization of the solenoid; a microswitch which causes the plunger to deenergize the solenoid after a short period of time after the solenoid is energized; a spring that resiliently engages and prevents movement of the
The cylinder is pivotally connected to an opening formed in the cylinder, and when the lock is locked, it locks with the dead bolt and the plunger which is in the initially deactivated position to prevent the dead bolt from moving, and when the lock is unlocked, the dead bolt is rotated to prevent the dead bolt from moving. A locking device comprising a cam which disengages the engagement between a spring and the plunger to enable the plunger to be displaced to an initially de-energized position, and which is further rotatable to a locked position by displacement of the dead bolt.