JPH04173688A - Safety device of vertically opening/closing type entrance door for hydraulic elevator - Google Patents

Abstract

PURPOSE:To prevent an accident to hold a human body and the like owing to a sudden door closing like a natural dropping by providing an engaging element to displace to the position to engage with a part of a door electromagnetically when a floor- touched door opening instruction is given, and to release the excitation when the door is fully opened, at the upper part of the ceiling of a cage touching the floor. CONSTITUTION:When a cage touches the floor and a door opening instruction is output, an electromagnetic coil 14 is excited, a plunger 14a is absorbed upward to rotate a lever 16 around a fulcrum 16a as the center, a roller 16c rotates an engaging element 13 in the direction of the arrow until it is limited by a stopper 17, and at the same time, the first door 2 and the second door 3 are fully opened. When the door opening instruction is eliminated, the plunger 14a and the lever 16 return to the original positions, but the engaging element 13 is still in the engaging condition with a bracket 2b installed to the side end of the first door 2. When the cage starts to drop naturally owing to a power failure and the like, the engaging element 13 is limited by the stopper 17, and it depresses the bracket 2b, and the first door 2 and the second door 3 are moved in the door closing direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a safety device for a vertically opening/closing landing door for a hydraulic elevator.

[Conventional technology]

Figure 1 is a front view of the main parts of a vertically opening/closing landing door for a hydraulic elevator. The second door opens and closes, 4a and 5a are suspension chains for the first door 2, 6a is a suspension chain for the second door 3, 9a is a sprocket that engages with the suspension chain 5a, and 9b is a suspension chain 4.
9c is a sprocket that engages with a, 9c is a sprocket that engages with a hanging chain 6a, and 7 is a counterweight.

5b is a suspension chain on the counterweight 7 side of the suspension chain 5a, 4b is a suspension chain on the counterweight 7 side of the suspension chain 4a, 6b is a suspension chain on the counterweight 7 side of the suspension chain 6a, and 10 is provided on a car (not shown). An engaging body 8 is a driven chain having an engaging body 10 that engages with the drive chain of the car door which is electrically driven by the car. Ru. 11 is fixed to a building 12 by a locking portion of a chain 6a.

As described in Japanese Patent Application Laid-open No. 49-113352, the conventional device has the following structure in the open position: first door + second door + chain (4a + 5a + 6a)>
A device that creates a weight difference in the closing direction as a counterweight + chain (4b + 5b + 6b) and holds the door against the natural closing force, a detection device that detects that the car has sunk by a predetermined amount, and a detection device that detects that the car has sunk a predetermined amount. It consists of a device that eliminates the holding force of the holding device by operation.

[Problem to be solved by the invention]

The above conventional technology closes the door due to the difference in the weight of the door, so
When the car naturally settles, a cam switch installed in the hoistway operates, and the holding force is released, the door falls naturally. There is a danger that people, luggage, etc. may get caught. Furthermore, in the event of a power outage, the holding force is released, posing the same danger as above. In addition, it is necessary to provide a holding device on the landing door of each floor and at the same time provide a cam switch in the hoistway, which increases the cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a safety device for a vertically opening/closing landing door for a hydraulic elevator, which is capable of preventing accidents in which persons or the like are trapped due to the door suddenly falling and closing.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a vertical opening/closing system for hydraulic elevators consisting of a door that is balanced when the door is open and can be raised and lowered by having a counterweight suspended from a chain that creates a weight difference as the door approaches the closed position. At the landing door,
It is installed above the ceiling of the car that lands on this landing, and is displaced to a position where it electromagnetically engages with a part of the door against a return spring when the landing door is commanded to open, and the excitation is released when the door is fully opened. It is equipped with an engager that can be used.

[Effect]

The present invention is provided above the ceiling of a car that lands on a landing, and is displaced to a position where it electromagnetically engages with a part of the door against a return spring when the landing door is commanded to open, and when the door is fully opened, By the engager being de-energized.

As the car naturally sinks, the landing door is pushed down as well.
It is possible to prevent accidents in which people or the like are trapped due to the door suddenly falling and closing.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Figure 1 is a front view of the main parts of a vertically opening/closable landing door for a hydraulic elevator, Figure 2 is a side view of the car with this device installed,
FIG. 3 is a side view when the door is fully open.

In the figure, 13 is an engaging element, 13a is a fulcrum fixed to the cage and rotatably supports the engaging element 13, 14 is an electromagnetic coil, 14a is a plunger that is retracted and retracted by the electromagnetic coil 14,
15 is a return spring for the engaging element 13, and 16 is a plunger 14a.
A lever 16a is fixed to the car and rotatably supports the lever 16, 16c is a roller provided at one end of the lever 16, and 17 is an engager fixed to the car. 16b is a pin provided at the tip of the plunger 14a; 18 is a foot and a floor; other symbols indicate the same parts as in FIG.

When the car lands on the floor and a door opening command is issued, the electromagnetic coil 14
is excited, and the plunger 14a is attracted upward.

As the plunger 14a moves, the lever 16 moves to the fulcrum 16.
Rotate around a.

The rotation of the lever 16 causes the roller 16c to rotate the engager 13 in the direction of the arrow against the return spring 15 until it is restricted by the stop 17. At the same time, the first door 2 and the third door 3 are fully opened in conjunction with a car door (not shown). When the door opening command is no longer issued, the electromagnetic coil 14 is demagnetized and the plunger 14a and lever 16 return to their original positions, but the engager 13 remains engaged with the bracket 2b attached to the side end of the first door 2. It will remain as it is. If the car starts to sink naturally due to a power outage, etc., the engager 13 will move to the stopper 1 as the main body of the device installed in the car moves downward.
7, push down the bracket 2b, and open the first door 2.
, the second door 3 moves in the closing direction. In addition, when the door is fully open, the first door + second door + chain (4a + 5a
+68) = counterweight + chain (4b+5b+6
b) However, as the door closing operation progresses with this device and approaches the fully open position, the chain (4a + 5a)
+6a)>Chain (4b+5b+6b), and the first door 2 and second door 3 start closing themselves due to the difference in weight. Then, the self-closing speed of the door becomes faster than the natural sinking speed of the car, the engagement between the bracket 2b and the engaging element 13 is released, and the engaging element 13 is returned to its original position by the return spring 15.

〔Effect of the invention〕

According to the present invention, the car is provided above the ceiling of a car that lands on the landing, and is displaced to a position where it electromagnetically engages with a part of the door against a return spring when the landing door is commanded to open, and the door is fully opened. Since the engaging element, which is de-energized at the same time, pushes down the landing door as the car naturally sinks, it is possible to prevent an accident in which someone is trapped due to the sudden closing of the door due to its natural fall.

[Brief explanation of the drawing]

Fig. 1 is a front view of essential parts showing an embodiment of the safety device for a vertically opening/closing landing door for a hydraulic elevator according to the present invention, Fig. 2 is a side view of the car with this device installed, and Fig. 3 is a side view of the safety device of the present invention. It is a side view when the door is fully open. 2...First door, 2b...Bracket, 13...Engager, 14...Electromagnetic coil, 14a...Plunger, 15・・・・・・
Return spring, 16...Lever, 17...
Stopper. Figure 1 1□ Figure 2 Figure 3

Claims (1)

[Claims] (1) A safety device for a vertically opening/closing landing door for a hydraulic elevator consisting of a door that is balanced in the open state and can be raised or lowered by having a counterweight suspended from a chain that produces a weight difference as the door approaches the closed position. It is installed above the ceiling of the car that lands on the landing, and is displaced to a position where it electromagnetically engages with a part of the door against a return spring when the landing door is commanded to open, and the excitation is released when the door is fully opened. A safety device for a vertically opening/closing landing door for a hydraulic elevator, characterized by being equipped with an engaging element.