JP3591419B2 - Elevator safety equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in an elevator safety device.
[0002]
[Prior art]
Should an elevator car stop between floors due to a power outage or malfunction, attach a manual handle to the motor shaft and manually rotate the handle to move the elevator car to the nearest floor. Rescue passengers is performed.
[0003]
At this time, it is necessary to perform work after shutting off the power supply of the elevator. Conventionally, a safety device as shown in FIG. 2 has been proposed.
[0004]
That is, the shaft 3 of the driving motor 2 of the hoisting machine 1 is provided with a mounting portion 3a of the manual handle 5, and a case 4 is provided so as to surround the mounting portion 3a. When the manual handle 5 is mounted on the mounting portion 3a, the manual handle 5 activates the switch 6 to cut off the power of the elevator.
[0005]
Therefore, when the manual handle 5 is fitted to the mounting portion 3a, the power of the elevator is automatically cut off, so that an accident due to forgetting to turn off the power during the rescue operation can be prevented.
[0006]
[Problems to be solved by the invention]
However, in such a device, when the manual handle 5 is turned, an excessive force is applied to the switch 6, so that there is a high possibility that the switch will be damaged, and the reliability remains uneasy.
[0007]
The present invention has been made in view of the above points, and has as its object to provide a highly reliable safety device.
[0008]
[Means for Solving the Problems]
The present invention provides an elevator hoist driving motor shaft provided with a manual handle mounting portion, a case surrounding the mounting portion, and a movable cover for covering an opening of the case. The cover has a through hole facing the mounting portion after being moved, and a switch operated by the cover is arranged in the case, and the switch operates a drive circuit of the elevator.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, the safety switch is changed to be operated by the cover.
[0010]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an enlarged view of a main part showing an embodiment of the present invention, and FIG. 3 is an enlarged view showing a state where a manual handle according to the present invention is attached.
[0011]
In the figure, the same parts as those in FIG. 2 show the same parts, but 2a is a mounting portion of the manual handle 5 'according to the present invention, 10 is a detachable cover, and this cover 10 always operates the switch 6'. I have. When the switch 6 'is operated, a contact is incorporated in the drive circuit so that the electric motor 2 can rotate.
[0012]
In such an apparatus, in order to attach the manual handle 5 'prior to the rescue operation, the cover 10 must first be removed, and when the cover 10 is removed, the switch 6' is free and the normally open contact is opened. As a result, the drive circuit is shut off, so that safety measures are already taken before the manual handle 5 'is attached.
[0013]
Then, no extra force is applied to the switch 6 'by the manual handle 5', and an extremely reliable device with little risk of failure can be constructed.
[0014]
Next, another embodiment in which the drive circuit is shut off when the switch 6 "is operated will be described. FIG. 4 shows a case where the cover 10 'is slid (moved upward in the figure) instead of being removed. That is, when the cover 10 'is displaced upward to move the through hole 10'a (to a position facing the mounting portion 2a) in order to attach the manual handle 5' to the mounting portion 2a, the projection portion 10'b activates switch 6 ". When the switch 6 "is operated, the drive circuit is shut off. As a result, also in this case, safety measures are taken before the mounting of the manual handle 5 '.
[0015]
【The invention's effect】
As described above, according to the present invention, the operation at the preceding stage when the manual handle is used can be reliably detected, and the drive circuit is shut off based on the detection, so that an extremely reliable safety device that does not apply unnecessary force is configured. it can.
[Brief description of the drawings]
FIG. 1 is an enlarged view of a main part showing one embodiment of the present invention.
FIG. 2 is a view showing a conventional safety device for an elevator.
FIG. 3 is a view showing a state where a manual handle according to the present invention is attached.
FIG. 4 is an enlarged view of a main part showing another embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 1 hoisting machine 2 drive motor 3 motor shaft 4 case 2a, 3a handle mounting part 5, 5 'manual handle 6, 6', 6 "switch 10, 10 'cover

Claims (1)

An elevator hoist drive motor shaft is provided with a manual handle mounting portion, a case surrounding the mounting portion, and a cover movably configured to cover an opening of the case .
An elevator, wherein the cover has a through hole facing the mounting portion after moving , and a switch operated by the cover is arranged in the case, and the switch operates a drive circuit of the elevator. Safety equipment.

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