JP2730841B2 - Elevator door safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door safety device provided on an elevator door to prevent passengers and luggage from being caught in the door when the door is closed.

[0002]

2. Description of the Related Art FIG. 5 is a front view showing a conventional elevator door safety device disclosed in, for example, Japanese Utility Model Laid-Open No. 55-50023 and Japanese Utility Model Laid-Open No. 63-123573, and FIG. It is a part enlarged view. In the figure, 1 is an elevator door, 2 is a door 1 via a rotatable lever 3.
Operating piece (safety shoe) attached to the
The operating piece 2 can reciprocate in the opening and closing direction of the door 1.

[0003] Reference numeral 4 denotes a switch mounting base fixed to the door 1,
Reference numeral 5 denotes a mounting shaft of the lever 3 mounted on the switch mounting base 4, reference numeral 6 denotes a stopper which is mounted on the switch mounting base 4, and an end of the lever 3 abuts when the operating piece 2 is in the normal position, and reference numeral 7 denotes A tension spring, which is provided between the lever 3 and the switch mount 4 and urges the end of the lever 3 in a direction in which it comes into contact with the stopper 5, is attached to the switch mount 4 and is operated by the rotation of the lever 3. This is a reverse command switch.

Next, the operation will be described. Usually, the lever 3 comes into contact with the stopper 6 and stops. However, when the operating piece 2 is moved by a force from the front direction or a right angle direction, the lever 3 rotates against the tension spring 7 and separates from the stopper 6. As a result, the reversing command switch 8 is operated to reverse the door 1 during the door closing operation in the door opening direction.

[0005]

In the conventional elevator door safety device configured as described above, for example, when carrying a load using a trolley, the trolley or the load collides with the operating piece 2 due to the collision. The lever 3 may be broken.
In such a case, it is preferable for safety to keep the door 1 open. However, if the operating piece 2 falls due to breakage of the lever 3, the remaining part of the lever 3 contacts the stopper 6 by the tension spring 7. There is a problem in that the door 1 remains closed , the inversion command switch 8 does not operate, and the door 1 is closed .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and the reversal command switch can be operated even when the operating piece falls due to breakage of the lever, and the safety can be improved. It is an object of the present invention to obtain an elevator door safety device capable of improving the operability.

[0007]

According to the present invention, there is provided a door safety device for an elevator, wherein when the lever is broken, the remaining portion of the lever is separated from the stopper against a spring for urging the lever toward the stopper. A detection spring is provided.

[0008]

According to the present invention, when the lever is broken and the operating piece falls, the load applied to the lever is reduced, so that the broken detection spring can separate the rest of the lever from the stopper.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a front view showing an essential part of an elevator door safety device according to an embodiment of the present invention. The same or corresponding parts as those in FIGS. 5 and 6 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, reference numeral 11 denotes a stopper which is attached to the switch mounting base 4 and in which the lever 3 contacts.
The stopper 11 is provided with a spring mounting hole 11a. Reference numeral 12 denotes a breakage detection spring mounted in the spring mounting hole 11a. This breakage detection spring 12 is normally compressed by the spring force of the tension spring 7 and the weights of the operation piece 2 and the lever 3. When the lever 3 is broken, the spring force is set so that the remaining portion 3a (FIG. 4) of the lever 3 is separated from the stopper 11.

FIG. 2 is a front view of the stopper 11 of FIG. 1, and FIG. 3 is a side view of FIG.
It is fixed to the bottom of the spring mounting hole 11a by a spring mounting screw 13. Further, the stopper 11 itself is fixed on the switch mounting base 4 by a stopper mounting screw 14.

In such a door safety device, when the lever 3 breaks and the operating piece 2 drops as shown in FIG. 4 due to a collision with the operating piece 2 such as a luggage or a cart, the breakage detecting spring 12 is compressed. Since the breaking force is partially removed, the breakage detection spring 12 extends against the tension spring 7,
The remaining portion 3 a of the lever 3 is separated from the stopper 11. As a result, the inversion command switch 8 is operated, and the door 1 is inverted in the opening direction. As described above, when the lever 3 is broken, the inversion command switch 8 is kept operated, so that the door 1
Is maintained in the open state. That is, according to the door safety device of this embodiment, the door 1 is automatically opened when the lever 3 is broken, so that safety is improved.

In the above embodiment, the breakage detecting spring 12 is attached to the stopper 11, but may be attached to another position. Although one breakage detection spring 12 is provided in the above embodiment, a plurality of breakage detection springs 12 may be provided as necessary.

[0014]

As described above, in the elevator safety device according to the present invention, when the lever is broken, the breakage for separating the remaining portion of the lever from the stopper against the spring for urging the lever toward the stopper side. With the detection spring,
Even if the operating piece falls due to the breakage of the lever, the reversing command switch can be operated to open the door,
This has the effect of improving safety.

[Brief description of the drawings]

FIG. 1 is a front view showing an essential part of an elevator door safety device according to an embodiment of the present invention.

FIG. 2 is a front view showing the stopper of FIG. 1;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view showing a state when the lever is broken in FIG. 1;

FIG. 5 is a front view showing a conventional door safety device for an elevator.

FIG. 6 is an enlarged view of a main part of FIG. 5;

[Description of Signs] 1 Door 2 Operating piece 3 Lever 3a Remaining 7 Tension spring (spring) 8 Reverse command switch 11 Stopper 12 Breakage detection spring

Claims (1)

(57) [Claims] 1. A door is rotatably mounted on a door via a mounting shaft.
A lever being kicked, and operating piece attached to reciprocally above the door opening and closing direction of the door through a lever, provided on the door, and the stopper the lever abuts in the normal, the A spring provided between the door and the lever, for urging the lever in a direction to contact the stopper, and a reversal command for reversing the door when the lever is separated from the stopper against the spring. A switch , provided between the door and the lever, and when the lever is broken and divided into the operating piece side and the mounting shaft side, the remaining portion of the lever, which is a portion on the mounting shaft side , Up
An elevator door safety device, comprising: a breakage detection spring that is separated from the stopper against the spring.