JPH0720832B2 - Elevator car door lock device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car door locking device, and is particularly suitable for preventing an intentional stop during traveling by preventing the car door from opening above a certain level during traveling. Elevator car door lock device.

[Background of the Invention]

Conventional elevator car doors are generally not equipped with mechanical locking devices. Therefore, if the passenger deliberately opens the car door inside the car while the elevator is running, the car door will open. When the car door is opened for a certain distance or longer, the door switch is turned off and the elevator is stopped in order to prevent passengers in the car from falling into the elevator hoistway. This type of elevator is definitely safe, but conversely, a person who knows this system deliberately opens the car door, stops the elevator, and inflicts harm on other passengers in the car. Is occurring.

As one of the means for preventing the door from being pry open, it is conceivable to apply the technique as disclosed in Japanese Patent Laid-Open No. 56-132284. However, this technique has a problem in that when the car door drive link is locked, the car door must be completely closed, and when the car door is not completely closed, the lock pin hits the link and cannot be locked. Atsuta In order to solve this problem, in this technique, the gap between the link and the lock pin is increased by a certain amount or more. By the way, the wide gap between the link and the lock pin means that when the car door is opened from the inside of the car, the opening amount of the car door becomes large until the car door is prevented from opening. However, this technique requires that passengers in the car do not fall even if such a degree of opening occurs. Therefore, according to this method,
It is possible to prevent passengers from opening the car door and falling into the hoistway when the elevator stops outside the floor level while the elevator is running. However, since the car door can be opened, although it is below a certain level, the door switch can be turned off, and the elevator can be stopped from running.Thus, even with this technology, the purpose of preventing the crimes mentioned above is achieved. I couldn't do it.

[Object of the Invention]

An object of the present invention is to provide a mechanical lock mechanism to a drive system of a door drive so that a car door cannot be opened even if the car door is deliberately opened from inside the car while the elevator is traveling, so that the door can be locked while the car is running. Therefore, passengers in the car can be prevented from falling into the hoistway, and the elevator does not stop when the door is opened, so it is possible to provide a car door lock device for the elevator that can prevent crimes occurring in the car. It is in.

[Outline of Invention]

The present invention relates to an elevator having a door switch that stops traveling when the car door is manually opened from a certain distance or more from the inside during traveling and a door drive system that opens and closes the car door while the car is traveling. When the car door is closed, the lock metal fitting driven by the excited electromagnet engages with the lock bracket provided in the door drive system, and when the car door opening condition is satisfied when the car is stopped, the lock metal fitting and the lock metal are locked. It is characterized in that a lock mechanism for disengaging the bracket is provided.

Example of Invention

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

FIG. 1 is a front view showing a first embodiment of the present invention, FIG. 2 is a plan view of an essential part of FIG. 1, FIG. 3 is a front view of an essential part of a locking mechanism,
FIG. 4 is a side view of FIG. 3, and FIG. 5 is a side view of essential parts of FIG. The embodiment shown in these figures is configured as follows.

Now, the door drive unit and the door unit will be described.

In the figure, reference numeral 1 is a door motor. The door motor 1 is fixed to a drive unit base 2, and a pulley 3 and a reduction pulley 4 attached to a rotation shaft of the motor 1 are connected by a chain 5. One end of a connecting link 6 is rotatably supported by a pin 7 on the reduction pulley 4, and the other end of the connecting link 6 is rotatable via a pin 9 to a main lever 8 whose one end is rotatably supported by the drive unit base 2. Installed on. The other end of the main lever 8 is pivotally supported on the door 11 via a small link 10. Door 11 and door
The door 12 is suspended on a door suspension rail 13 via wheels, and the doors 11 and 12 can be opened and closed along the door guide groove and the rail 13 at their lower portions (not shown). The door 11 is a pulley 14A provided at both ends of the rail 13,
It is fixed by the fixing part 16 to the rope 15 that has been stretched over 14B,
Similarly, the door 12 is fixed to the rope 15 by a fixing portion 17.
A sliding piece 18 is attached to the door 12 so as to press the movable portion of the limit switch 19 when the door 12 is closed. The reduction pulley 4 is rotatably supported by a shaft 20, and a cam 21 fixed to the shaft 20 contacts a switch 22 according to the rotation of the shaft 20.
It is coming off.

The door drive unit and the door unit are configured as described above.

Next, the locking mechanism will be described.

The locking mechanism of this embodiment is configured as follows.

An electromagnetic coil 26 is fixed to a base 25 provided on the drive unit base 2, and a plunger 27 is provided so as to be movable inside the electromagnetic coil 26. The plunger 27 is biased downward in the drawing by a coil spring 28, and is connected to a lock lever 29 at the lower portion of the plunger 27 via a pin. The lock lever 29 is integrated with a lock fitting 32 including a bearing 31 attached to a base 25 via a shaft 30.

When the coil 26 is energized and the plunger 27 is absorbed, the position shown in FIG. 5 is reached. Rock lever
The lock confirmation switch 33, which comes into contact with 29, is provided on the side opposite to the shaft 30 so that when the plunger 27 sucks,
29 comes into contact with the moving part. In addition, 34 is a stopper.

A lock bracket 35 is attached to the deceleration pulley 4 at a predetermined position so as to abut the lock fitting 32.

Limit switch 19 and switch 22 Lock confirmation switch 33
Signal from the control circuit 40 can be input to the control circuit 40. The control circuit 40 can output a lock command signal to the electromagnetic coil 26 when a predetermined condition is satisfied.

FIG. 6 is a circuit diagram showing the control system of the door lock mechanism in the control circuit 40.

In the figure, HA is a directional check switch, Sy is a switch that is turned on (ON) when the door is closed, and turned off (OFF) when decelerated, d
Reference numeral 1 is a contact of the relay DL1, and SF is a switch that is turned off in the open zone. Then, regarding the lock, it is as follows.

When the directional switch HA is closed and the doors (11, 12) are closed, Sy is turned on and the relay DL1 is excited. Then, the contacts d1-1 and d1-2 are closed. Here, when the switch 22 is turned on, the relay DL2 is excited, the contacts dl2-1 and dl2-2 are closed, and the dl2-3 is opened. When the contact dl2-2 is closed, the electromagnetic coil 26 is energized. The diode D is for protecting the electromagnetic coil 26. When the electromagnetic coil 26 is excited, the plunger 27
Is sucked and the lock is completed, the switch 33 is closed, so that the relay DP is excited and the contact point of the relay DP is closed, so that the elevator can be moved.

The unlocking is as follows.

When the elevator decelerates, the switch Sy will open. Next, when the elevator reaches the open zone, the switch SF opens and the relay DL1 is de-energized. As a result, the relay DL2 is de-energized and the contacts dl2-1, dl2-
2 opens and contacts dl2-3 close. Since the contact point dl2-2 is opened, the electromagnetic coil 26 is not excited. This makes the switch
33 opens and relay DP is de-energized. Since the contacts dl2-3 close, the timer TM starts counting up.

When the timer TM counts up, the auxiliary relay TM is energized and the relay DP is de-energized.
1,12 can be opened. The operation will be described below.

The rotation of the door motor 1 is transmitted to the reduction pulley 4 by the chain 5 and is transmitted to the main lever 8 via the connecting link 6 supported by the reduction pulley 4 by the pin 7, and is connected to the small link.
The left car door 11 is opened and closed by 10. Since the right car door 12 is connected to the left car door 11 by the rope 15, the right car door 12 opens in the opposite direction to the left car door 11, and it is possible to get in and out of the car.

Next, a lock operation will be described.

When the operation command is received, it is judged whether or not the direction is present (step 100), it is judged whether there is a closing door command (step 101), the relay DL1 is excited (step 102), and the car doors 11 and 12 are opened. From the state, it is closed by the rotation of the door motor 1 (step
103), when the lock bracket 35 comes under the lock bracket 32, that is, the position where a gap a larger than 0 is generated between the lock bracket 35 and the lock bracket 32 is converted into the rotation angle of the speed reduction pulley 4, The switch 22 is closed by the cam 21 attached to the shaft 20 of the No. 4 (step 10).
Four). Then, since the contacts d1-1 and d1-2 are already closed, the switch DL22 is turned on to excite the relay DL2 (step 105), and the contact dl2 is closed to close the electromagnetic coil.
Energize 26 (step 106). As a result, the plunger 27 in the electromagnetic coil 26 is pulled up, the lock lever 29 and the lock metal fitting 32 rotate about the shaft 30 as a fulcrum, and the lock bracket 35 and the lock bracket 35 are rotated.
The lock fitting 32 slides to a position where it goes inside the vertical line of. This makes it possible to create a lock state, but when the lock lever 29 turns on the lock confirmation switch 33 that confirms that the lock has been applied (switch 107), the DP relay is turned on (step 10).
8) The elevator can start moving for the first time (step 10).
9). It goes without saying that the lock confirmation switch 33 is turned on when the tip 32T of the lock fitting 32 is located on the vertical line of the end surface 35T of the lock bracket 35. The elevator runs in this state and the car door 1
When the levers 1 and 12 are opened, the reduction pulley 4 rotates via the small link 10, the main lever 8 and the connecting link 6, and the lock bracket 35 attached to the reduction pulley 4 also rotates together.
The lock bracket 35 hits the lock fitting 32 and is mechanically locked at this position.

The operation of removing the lock will be described.

Switch Sy when the car approaches the level of the arrival floor and slows down
Is opened (steps 110 to 112), that is, if the doors 11 and 12 can be opened electrically and mechanically (step 113), switch SF is opened and relay D is opened.
Since L1 degausses (step 114), which causes the relay DL2 to degauss (step 115), demagnetize the electromagnetic coil 26,
Release the lock. When the demagnetization command of the electromagnetic coil 26 is issued,
Since the contacts dl2-3 are closed, the timer TM counts the timer (step 117), and when the count is up (step 120), the auxiliary relay TMX is excited (step 12).
1) After a certain time, an open command is issued to the door motor 1 to open the doors 11 and 12 (step 12
2). Further, when the door lock magnetic recognition switch 33 is turned off, the relay DP is turned off (steps 118 and 119).

According to the present embodiment, even if the car doors 11, 12 are deliberately or accidentally opened in the car while the elevator is running, the lock bracket 35 hits the lock bracket 32, and the lock bracket 35 and the lock bracket 32. The car doors 11 and 12 are not opened more than the opening amount of the car doors 11 and 12 which is proportional to the gap b in the fully closed state. And in this embodiment,
By setting the operating position of the door switch 19 to be larger than the opening amount of the car doors 11 and 12, the elevator will not stop. Therefore, according to the present embodiment, since the door is locked, it is possible to prevent passengers in the car from falling into the hoistway, and to stop the elevator and commit a crime in the car. There is an advantage that it can be prevented.

FIG. 8 is a front view showing another embodiment of the present invention, and FIG. 9 is a side view of FIG. The difference from the above embodiment is that the electromagnetic coil 26A is placed horizontally and the plunger 27 of the electromagnetic coil 26A is
There is no change in the other constitution, because one end of A is directly inserted into the hole c of the lock bracket 35A to make a lock state. A lock confirmation switch 33 is provided at the other end of the plunger 27A. In this embodiment as well, the same operational effects as the above-mentioned embodiments are obtained. According to this embodiment, there is an effect that the device becomes compact.

FIG. 10 is a front view showing another embodiment of the present invention.

This embodiment is different from the first embodiment in that the lock mechanism is a lock system in which a lock bracket 35B is fixed to a finger 50 that suspends the car doors 11 and 12 among the drive systems of the car doors.
The lock bracket 35B is attached to the lock bracket 35B to make a door lock state.

Further, in other words, when the electromagnetic coil 26B is excited, the plunger 27B is attracted upward in the figure, so that the lock metal fitting 32B moves to the position of the two-dot chain below the figure around the fulcrum 51, and the lock bracket 35B. Creates a rock state between.

When the electromagnetic coil 26B is demagnetized, the lock bracket 35B moves upward in the figure by the spring 28B around the fulcrum 51, and the plunger 27B is pulled out downward in the figure. This releases the lock. The lock confirmation switches 33B ₁ and 33B ₂ can confirm the locked state and the unlocked state.

The embodiment further has an effect that the opening amount of the car doors 11 and 12 can be minimized.

〔The invention's effect〕

As described above, according to the present invention, even if the car door is opened from the inside of the car while the elevator is traveling, the locking mechanism that mechanically locks the car door operates.
If you accidentally try to open the car door, the car door will not open,
Prevents passengers in the car from falling into the hoistway, and prevents the crime of intentionally opening the car door, turning off the door switch to stop the elevator, and harming other passengers in the car. The effect is that you can do it.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is an enlarged view of an essential part showing a relation between a lock bracket and a lock fitting according to the present invention, and FIG. FIG. 3 is a side view, FIG. 5 is an enlarged side view showing an essential part of the locking mechanism, FIG. 6 is a circuit diagram showing a part of a control circuit, and FIGS. 7 (I) and (II) are the same embodiment. FIG. 8 is a front view showing another embodiment, FIG. 9 is a side view of FIG.
FIG. 10 is a front view showing still another embodiment. 22 ... Magnetic switch, 26 ... Electromagnetic coil, 32 ... Lock metal fittings, 33 ... Lock confirmation switch, 35 ... Lock bracket.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Sasaki 1070 Ige, Katsuta-shi, Ibaraki Hitachi, Ltd. Mito Plant (56) References JP 57-199782 (JP, A) JP 58- 19588 (JP, B2)

Claims (1)

[Claims] 1. A car traveling in an elevator having a door switch for stopping traveling when the car door is manually opened for a certain distance or more from the inside during traveling and a door drive system for opening and closing the car door. When the car door is closed, the lock metal fitting driven by the excited electromagnet is engaged with the lock bracket provided in the door drive system, and when the car door opening condition is satisfied when the car is stopped, the lock metal fitting and the An elevator car door lock device comprising a lock mechanism that is disengaged from a lock bracket.