JPH0354282Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a locking device for a sliding door. More specifically, the present invention relates to a door lock device in which a lock protrusion protrudes from a blind or lower rail and engages with a locking hole or a locking step provided in an upper or lower stile to lock the door.

[Prior Art] Conventionally, as shown in FIG.
is provided downward, and the movable iron core 2 of this solenoid 26
A protrusion 28 is directly connected to the door 7, and the protrusion 28 is guided by a guide hole 29 so as to be able to move up and down, and is engaged with a protrusion 32 of an upper stile 31 of the door 1.

[Problems to be solved by the invention] In the case where the protruding body 28 is directly connected to the movable iron core 27 as described above, the door 1 is biased in the opening direction;
In other words, when the protrusion 28 and the protrusion 32 of the door 1 are in pressure contact with each other, even if the solenoid 26 is energized to unlock the door, the frictional resistance between the protrusion 28 and the protrusion 32 will cause the drive generated by the solenoid 26 to be interrupted. The protruding body 28 cannot be pulled out because the force is larger than the force.
Not only does it become impossible to unlock the lock, but it also has an adverse effect on the solenoid 26, and if this condition continues for a long time, the solenoid 26 may burn out. In order to solve this problem, there were problems such as the need for a large solenoid that generates a stronger driving force. Furthermore, if the solenoid 26 is installed facing downward, the vertical distance (s) must be large, including the stroke of the movable core 27 and the protruding body 28, and there is also the problem that it can only be installed in a location with a considerably large space. Ta.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and is a device in which a locking protrusion is provided facing a sliding door so that it can move forward and backward. ,
One end of the protruding body is rotatably attached to one end of an arm, the other end of the arm is rotatably attached to a fixed support frame, and the other end of the protruding body is moved forward and backward by a solenoid. A locking roller is provided, and the forward and backward directions of the protruding body and the locking roller are substantially perpendicular to each other.

[Operation] When the solenoid is energized and energized, the locking roller moves together with the movable iron core, and the engagement between the locking roller and the protrusion is released. Since the locking roller is rotatable, even if pressure is applied between the protrusion and the protrusion of the door, the locking roller rolls on the protrusion and smoothly moves with small frictional resistance. Move. When the engagement between the protruding body and the locking roller is released, the protruding body is rotated by the force exerted by the door and is pushed into the blind, opening the door.

When closing the door, even if the locking roller is locked to the protruding body, the protruding body is pushed into the blind and the door is closed.

[Embodiment] An embodiment of the present invention will be described based on FIGS. 1 to 4.

In these figures, 1 is a door that opens and closes by sliding, and if this door 1 is an automatic door, a motor, an upper rail, a hanging frame, etc. are installed inside the door. A locking device 2 of the present invention is also installed within this opening. A downward U-shaped arm 3 is rotatably attached to the support frame 12 of the locking device 2 with an upward U-shaped cross section by a shaft 4, and the door 1 is attached to the inside of the other end of this arm 3. A protrusion 6 that engages with and disengages from the protrusion 5 is rotatably attached to the shaft 7. A bar 8 is provided between the shafts 4 and 7 of the arm 3, and this bar 8 is loosely fitted into a hole 9 made in the protruding body 6, and within this play, the protruding body 6 is starting to oscillate. The protruding body 6 is integrally provided with a stopper part 10 which is vertical on one side and tapered on the other side, and this stopper part 10 always protrudes from the protrusion opening 13 of the support frame 12 by a spring 11 provided on the support frame 12. is biased in the direction of
The projection 6 is also provided with a locking step 14 on the side opposite to the shaft 7. A locking roller 16 is provided facing this locking step 14 and is moved forward and backward by a solenoid 15 and a spring 22. It is attached so that it can move freely. The connecting rod 17 slidably passes through the guide 19, and the other end is connected to the movable iron core 21 by a shaft 20.
This movable iron core 21 is always urged in the advancing direction by a spring 22.

Next, a shaft 20 that connects the connecting rod 17 and the movable iron core 21 passes through the elongated hole 33 of the support frame 12 and extends to the outside. A slider 23 is provided. This slider 23 is pulled by a spring 24 in a direction in which it does not press the shaft 20. Furthermore, a string 25 for manual unlocking is connected to the slider 23.

Next, the operation of the above configuration will be explained.

FIG. 1 shows a state in which no electricity is applied. In this state, as the protruding body 6 is pushed downward by the spring 11, the arm 3 also rotates downward about the shaft 4, and the stopper part 10 protrudes from the protrusion opening 13. Moreover, the movable iron core 21 and the connecting rod 17 are connected to the spring 2
A locking roller 16 protrudes at 2 and locks onto the locking step portion 14 . In this state, even if a force _F0 is applied from the direction of arrow A when the door 1 tries to open, the protrusion 6
Since the door cannot be rotated to the left in Figure 1, the door 1 cannot be opened.

Next, when the solenoid 15 is energized and excited, the locking roller 16 moves together with the movable iron core 21 against the spring 22, and the locking roller 16 and the protrusion 6
The engagement with the locking step portion 14 is released. Here, since the locking roller 16 and the shaft 4 are rotatable, even if a force F ₀ is applied from the direction of arrow A, the shaft 4 will rotate on the U-shaped fitting 18 and the locking roller 16 will rotate. It rolls on the locking stepped portion 14 and moves smoothly with small frictional resistance. When the engagement between the locking step portion 14 and the locking roller 16 is released, the protruding body 6 is moved by the force in the direction of arrow A from the door 1.
It rotates around the shaft 7 against the spring 11, is pushed into the supporting frame 12, and the door 1 is opened. Here, the lever is applied using the point of contact a between the door 1 and the protruding body 6 as the point of force, the center point b of the shaft 7 as the fulcrum, and the point of contact c between the locking step 14 of the protruding body 6 and the locking roller 16 as the point of action. It consists of Therefore, the pressing force F generated between the locking step portion 14 and the locking roller 16 is the pressing force F _{0 generated between the door 1 and the protruding body 6, and the pressing force F generated between the locking step portion 14 and the locking roller 16} is linear with the advancing direction of the door 1.
If the angle formed by ab is θ, then F=F ₀ ×sinθ×ab/bc. Therefore, as θ approaches 0 degrees and/or ab/bc becomes smaller, the door opens with a smaller force. For example, if θ=30° and ab/bc=1/2, F=1/4F ₀ , which further reduces the contact resistance to 1/4.

When closing the door 1, even if the locking roller 16 is locked to the locking step 14, a force is applied to the point d of the protrusion 6 from the direction of arrow B as shown by the chain line in FIG.
The arm 3 rotates about the shaft 4, the protruding body 6 is pushed into the supporting frame 12 as shown in FIG. close.

Next, to open the door 1 when the solenoid 15 cannot be energized due to a power outage, etc., pull the slider 23 connected to the string 25 against the spring 24, and the tip of the slider 23 will come into contact with the shaft 20, allowing it to move. The iron core 21 and the connecting rod 17 are moved against the spring 22, and the protruding body 6
The engagement between the locking stepped portion 14 and the locking roller 16 is released, and the lock is unlocked.

[Effects of the invention] Since the present invention is constructed as described above, even when the door is biased in the opening direction, it can be smoothly unlocked with a small solenoid force. Additionally, the solenoid can be placed horizontally, so there are no restrictions on where it can be installed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a longitudinal sectional front view when the door is locked, Fig. 2 is a sectional bottom view, Fig. 3 is a longitudinal sectional front view when the door is unlocked, and Fig. 4 is a longitudinal sectional view of the door when the door is unlocked. FIG. 5, a longitudinal sectional front view when opened, is an explanatory diagram of a conventional lock. 1...Door, 2...Lock device, 3...Arm, 5...
... protrusion, 6 ... protrusion, 8 ... bar, 9 ... hole,
10... Stopper part, 11... Spring, 12... Support frame, 13... Projection opening, 14... Locking step part, 15...
... Solenoid, 16 ... Locking roller, 23 ... Slider, 24 ... Spring, 25 ... String.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a door in which a locking protrusion is provided facing a sliding door so that it can move forward and backward, one end of the protrusion is rotatably attached to one end of the arm,
The other end of the arm is rotatably attached to a fixed support frame, and the other end of the protrusion is provided with a locking roller that is moved forward and backward by a solenoid, and the protrusion and the locking roller move back and forth. A door locking device characterized in that the directions are substantially perpendicular to each other. (2) The locking device for a door according to claim 1, wherein the locking roller is rotatably locked at a portion where it locks with the protruding body.