JP2730430B2 - Elevator car door equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for opening and closing a car door installed in an elevator car.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show a conventional elevator car door device. FIG. 5 is a front view of a main part, and FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG.

In the figure, (1) is an elevator car, (1a) is its entrance, (2) is a support for a car door device,
(3) is a door rail, (4A) and (4B) are basket doors arranged in a two-door center-opening manner, and a hanger plate (4a) is fixed to an upper end thereof, and a hanger roller (4b ) Suspended on the door rail (3). Reference numeral (5) denotes a driving machine which is installed on the support (2), incorporates a door control circuit and the like, and has a deceleration pulley (5a) externally. The driving arm (5b) is connected to the deceleration pulley (5a).

[0004] (6A) (6B) is a fixed arm whose lower end is fixed to the car door (4A) (4B), (7A) (7B) is a drive link, the drive link
One end of (7A) is pivotally connected to the upper end of the fixed arm (6A) via a shaft (7a), and the other end is pivotally connected to one end of a drive arm (5b) via a shaft (7b). One end is at the upper end of the fixed arm (6B) via the shaft (7c),
The other end is pivotally connected to the other end of the drive arm (5b) via a shaft (7d). As shown in FIG. 6, for example, each of the above-mentioned pivots is connected to a drive link (7B) to a shaft (7c) via a bearing (7e).
A retaining ring (7f) is fitted into the shaft (7c).

[0005] (8) is installed on the support (2), the car door (4A) (4
(9) is fixed to the hanger plate (4a) of the car door (4A) and engages with the gate switch (8) when the car door (4A) comes to the fully closed position. It is a cam that matches.

The conventional elevator car door device is constructed as described above, and when the car doors (4A) and (4B) are fully opened, a door closing command is issued by a command from a control circuit (not shown). . Thus, the driving device (5) rotates, and the deceleration pulley (5a), that is, the driving arm (5b) rotates clockwise in FIG. This rotation is performed by the fixed arm (6A) by the drive link (7A) (7B).
(6B), the car doors (4A) and (4B) are driven in the door closing direction, and in conjunction with this, the landing doors (not shown) are also driven in the door closing direction.

As will be described in detail later, the control circuit starts counting the duration of the door closing simultaneously with the start of the door closing, and reaches a time T ₁ which is about twice (about 8 seconds) the time required for normal door closing. Check if you did. If the car door within the time T ₁ (4A)
(4B) is fully closed (the cam (9) of the car door (4A) is engaged with the gate switch (8) to operate the gate switch (8). (Not shown) also operates), and the door closing is completed.

If the closing of the door is not completed within 8 seconds, the door is once opened and the door closing operation is executed.
If the door is closed and there is a call on another floor, the car (1) starts running. At the same time, the car door (4A) (4B) and the landing door
The vehicle travels while confirming with the gate switch (8) and the interlock switch that the vehicle is completely closed during the traveling of (1).

If the gate switch (8) is opened while the car (1) is running, the car (1) stops in an emergency, but once the door is closed, the car (1) starts running again. When the car (1) arrives on the floor with the call, the door opening is started, and when the door opening limit switch (not shown) operates, the door opening is completed.
It waits with the door open for a time necessary for passengers getting on and off for about 4 seconds, and when this door opening time expires, the door close is started.

[0010]

In the conventional elevator car door device as described above, the gate switch (8) for confirming that the car doors (4A) and (4B) are fully closed is provided only on the car door (4A) side. Because it is provided, it is not enough to confirm the full closure of the car door (4B). That is, if the fixed arm (6B) and the drive link
If the retaining ring (7f) of the shaft (7c) connecting the (7B) falls off, the connection between the fixed arm (6B) and the drive link (7B) may be disconnected.
When this connection is released, the force of the drive arm (5b) is not transmitted to the car door (4B), and the operation of the car door (4B) cannot be confirmed by the gate switch (8). There is a problem that the car (1) may run with the car open.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can prevent a car from running with one of the car doors open even if a defect occurs in a connection portion of a drive link. It is an object of the present invention to provide an elevator car door device as described above.

[0012]

According to a first aspect of the present invention, a car door device for an elevator opens and closes a double door car with a link mechanism, and a gate switch for detecting a fully closed position is provided on one of the car doors. A pulley provided on one side of the car door, and
At one end the car door, in which the other is provided with an interlocking rope coupled to the other end of the car-door.

Further, the elevator car door device according to the second invention opens and closes a plurality of car doors with a link mechanism,
In a device provided with a gate switch for fully closed position detection on one of the car doors, a door closed limit switch for detecting that the other of the car doors has reached the fully closed position is provided, and after the car door starts closing, Re-opening means for re-opening the car door when the gate switch and the door closing limit switch do not operate within a predetermined time; and switch operation invalidating means for invalidating the operation of the door closing limit switch while the car is running. It is provided with.

[0014]

According to the first aspect of the present invention, since the double-door type car door which is opened and closed by the opening and closing mechanism is connected by the interlocking rope , the car door is opened and closed by the interlocking rope even if a defect occurs in the opening and closing mechanism.

In the second invention, a gate switch is provided on one side of the car door which is opened / closed by an opening / closing mechanism, and a door-close limit switch is provided on the other side. If the switch does not work, the car door is reopened and the car closed limit switch is disabled while the car is running, so the car will not run without the car door fully closed and the car will run again Inside relies on door closing confirmation by a gate switch.

[0016]

【Example】

Embodiment 1 FIG. FIG. 1 is a front view of an essential part showing one embodiment of the first invention of the present invention, and the same parts as those of the conventional device are denoted by the same reference numerals. FIG. 6 is also used in this embodiment.

In the drawing, (11) and (12) denote pulleys mounted on supports (2) on both sides of the car doors (4A) and (4B), and (13) denotes a pulley (11).
(12) is an endlessly wrapped interlocking rope. (14) is fixed to the hanger plate (4a) of the car door (4A).
3) A fixture for gripping one side, and (15) is a fixture that is fixed to the hanger plate (4a) of the car door (4B) and grips the other side of the interlocking rope (13).

Now, when the car doors (4A) and (4B) are fully open, a defect occurs in the shaft (7c) connecting the drive link (7B) and the fixed arm (6B) (for example, when the retaining ring (7f) is attached). Even if the drive link (7B) and the fixed arm (6B) are disengaged from each other due to a human error such as a fitting error at the time), the driving force of the driving machine (5) can be controlled by the drive link (7A) and the fixed arm ( It is transmitted to the car door (4A) via 6A). This driving force is also transmitted to the car door (4B) via the interlocking rope (13), the pulleys (11) and (12), and the fixtures (14) and (15).

Therefore, the car door (4B), which is not detected by the gate switch (8), opens and closes in conjunction with the car door (4A), so that the car (1) remains open while the car door (4B) is open. Riding is prevented. In addition, in the normal opening and closing, so that the two driving force transmission system does not produce mutually opposing forces,
It is desirable to adjust the tension of the interlocking rope (13) so as to be as loose as possible.

Embodiment 2 FIG. FIG. 2 is a front view of an essential part showing another embodiment of the first invention of the present invention, and the same parts as those of the conventional device are denoted by the same reference numerals.
FIG. 6 is also used in this embodiment. In this embodiment, the side of one of the car door one side of (4A) (one of the car doors (4A)
Mounting the support ways) (2) pulley (11), to which wound interlocking rope (13), at one end thereof a fixture (14), each bonded to the other end to a fixture (15) It is. (17) is an interlocking rope (1
This is a stopper to prevent the pulley (11) from coming off the pulley (11) when it is loosened.

In this embodiment, when the door is closed, the pulley (11) 1
The cage door (4B) on the side without the gate switch (8) is also a cage.
(4A) in conjunction for reliably door closes and, while car door (4B) is opened, it is prevented that the car (1) travels. Therefore, there is an advantage that it can be configured at low cost. It is desirable to adjust the tension of the interlocking rope (13) to be as small as possible so that the two driving force transmission systems do not generate mutually opposing forces during normal opening and closing.

Embodiment 3 FIG. 3 and 4 show the second embodiment of the present invention.
FIG. 3 shows an embodiment of the invention of FIG.
Is an operation flowchart, and portions similar to those of the conventional device are denoted by the same reference numerals. FIG. 6 is also used in this embodiment.

In FIG. 3, reference numeral (18) denotes a door closing limit switch installed on the support (2), which is constituted by an optical switch which is simpler than the gate switch (8). (19) is also a door open limit switch, (20) is fixed to the hanger plate (4a) of the car door (4B), and limit switches (18) and (19) respectively.
Is a light-shielding plate that shields light passing through.

When the car door (4B) on the side where the gate switch (8) is not provided is fully opened, the light shielding plate (20) blocks the light passing through the door opening limit switch (19) to shut off the car door (4B). When the full opening is detected and the car door (4B) is fully closed, the light blocking plate (20) blocks light passing through the door closing limit switch (18) and detects the full closing of the car door (4B). With this, while the car door (4B) is open, the car (1)
Is prevented from running.

Next, the overall operation of this embodiment will be described with reference to FIG. In step (21), start the door closing operation,
It starts to count the door-closing duration t _c in step (22). Door-closing duration t _c in step (23) determines whether the reached a predetermined time T _1, does not reach the predetermined time T _1, to continue the door closing operation in step (24). In step (25), it is determined whether the gate switch (8), the door closing limit switch (18), and the interlock switch have been turned on to determine whether the door has been closed.If not, the process returns to step (23).
(23) to (25) are repeated.

During the operation of steps (23) to (25), step (2)
When 3) in the door-closing duration t _c reaches the predetermined time T _1, by reversing the door closing operation proceeds to step (26) moves to the door-opening operation. It is determined whether the door opening has been completed in step (27) based on whether the door opening limit switch (19) has been turned on.If the door opening has not been completed, the process returns to step (26), and steps (26) and (27) are performed. repeat. If the door open limit switch (19) is turned on, step
The door opening is completed in (28), the process returns to step (21), and the door closing operation is started again. When each switch is turned on in step (25), the process waits for completion of door closing in step (29).

In this manner, the door closing limit switch (1
The car (1) does not travel with the car door (4B) opened because the door is not closed and the reversing door is opened repeatedly until 8) is turned on. Here, steps (21) to (29) constitute a door opening means.

Next, in step (29), while waiting for door closing, it is determined in step (30) whether there is a call on another floor. When a call occurs, the car (1) runs in step (31). At the same time, the operation of the door closing limit switch (18) is invalidated in step (32). In step (33), check whether the door is fully closed with the gate switch (8) and the interlock switch.If the door is not fully closed, continue driving the car (1) in step (31), If closing is not confirmed, car (1) stops in step (34)
Return to (33).

As described above, once the car (1) has traveled, the confirmation of the fully closed state by a simple optical switch such as the door closing limit switch (18) is invalidated, and the car (1) is turned off by turning off the switch (18). The unnecessary emergency stop of) is avoided, and the fully closed gate door (4A) is checked only with the reliable gate switch (8). Step (32) constitutes switch operation invalidation means.

When the car (1) arrives at the floor with the call in step (35), the operation shifts to the door opening operation in step (36), and it is determined in step (37) whether the door opening is completed. If not completed, return to step (36) and repeat steps (36) and (37). When the door opening is completed, the operation waits for door opening in step (38), opens the door for about 4 seconds, and returns to step (21).

[0031]

As described above, according to the first aspect of the present invention, the double- door car door which is opened and closed by the opening and closing mechanism is connected by the interlocking rope. Even when the car is opened and closed by the interlocking rope and the gate switch is installed only on one side of the car door, the car can be prevented from running while the other of the car doors is open.

In the second invention, a gate switch is provided on one side of the car door, and a door closing limit switch is provided on the other side of the car door.
After the door is closed, if the gate switch and door-close limit switch do not operate within a predetermined time, the car door is reopened, and while the car is running, the door-close limit switch is disabled. There is an effect that the car can be prevented from running without closing the door and danger can be prevented, and the reliability of the car can be improved by relying on the door closing confirmation by the gate switch while the car is running.

[Brief description of the drawings]

FIG. 1 is a front view of a main part showing a first embodiment of the present invention.

FIG. 2 is a front view of a main part showing a second embodiment of the present invention.

FIG. 3 is a front view of a main part showing a third embodiment of the present invention.

FIG. 4 is an operation flowchart of FIG. 3;

FIG. 5 is a main part front view showing a conventional car door device of an elevator.

FIG. 6 is an enlarged cross-sectional view taken along the line VI-VI of FIG. 5;

[Explanation of symbols]

Reference Signs List 1 car 4A, 4B car door 5 driving machine 6A, 6B fixed arm 7A, 7B driving link (opening / closing mechanism) 8 gate switch 11, 12 pulley 13 interlocking rope 14, 15 fixing device 18 door closing limit switch

Claims (2)

(57) [Claims] 1. A and two car-door of double door type, provided for the entrance of the elevator cage, and opening and closing mechanism for the power of the driving machine to open and close it and transmitted to the both car doors, one of the car-door in There device having a gate switch for detecting that come to the fully closed position, or a pulley provided on your door support, one end wound around the pulley is the other end to one of the car-door A car door device for an elevator, comprising: an interlocking rope connected to the other of the car doors. 2. A plurality of car doors provided in a car of an elevator, and a force of a driving machine is transmitted to the car door to transmit the force.
In a device having an opening / closing mechanism for opening and closing, and a gate switch for detecting that one of the car doors has reached a fully closed position, a door closing limit switch for detecting that the other of the car doors has reached a fully closed position. Provided, when the gate switch and the door closing limit switch do not operate within a predetermined time after the car door starts to close, re-opening means for re-opening the car door, and while the car is running, And a switch operation invalidating means for invalidating the operation of the door closing limit switch.