JPH0687574A - End floor safety device for elevator - Google Patents

Abstract

PURPOSE:To provide an end floor safety device using contact type switches for position detection in a low speed region without the generation of contact noise in position detection in a high speed region by using contactles switches for position detection in the high speed regions provided near both end floors in an elevator shaft, and using the contact switches for position detection in low speed regions. CONSTITUTION:Ascent speed reducing command switches 1U-5U are disposed on the elevator shaft side near the uppermost floor through a fitting plate 5. The switches 1U, 2U put in action at high speed are to be contactless switches such as memory switches put in action by magnetic force, and the switches 3U-5U put in action at low speed are to be contact type switches such as alternate type switches. When a car 1 ascends and a normal speed reducing command device is not put in action, a drive unit 9 faces the switch 1U when the car 1 approaches the end floor, and the switch 1U outputs a speed reducing command. With further ascent, the switch 2U also outputs a command signal. The switches 30-5U are then brought into contact with an operating cam 8 and successively put in action to stop the car 1 safely at the end floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end-floor safety device for safely stopping an end floor even if an elevator control system is in an abnormal state. The present invention relates to an elevator end-floor safety device which has a switch and reduces operating noise.

[0002]

2. Description of the Related Art A conventional end-floor safety device is disclosed in Japanese Patent Application No. 4-63169.
And Japanese Patent Application No. 3-126140,
Since the contact of the switch is operated by the contact between the switch side roller and the operating cam, the speed of the elevator increases the contact noise between the roller and cam and the rolling noise of the roller, and it is necessary to reduce the operating noise. It was

[0003]

In the prior art, the contact between the switch-side roller and the cam for operating this roller becomes higher as the operating noise increases as the elevator speed increases. On the other hand, a safety switch is required for the end floor safety device.

An object of the present invention is to provide an end-floor safety device which uses a contactless switch for position detection in a high-speed region and uses a contact-type switch that operates reliably for position detection in a low-speed region. is there.

[0005]

To detect a position in a high speed region, a non-contact type switch, for example, a Hall element operated by magnetic force, a memory switch, or an optical switch is arranged, and a position is detected in a low speed region. , An end-floor safety device with a switch for alternate operation.

[0006]

[Operation] By using the non-contact type switch for detecting the position in the high speed region, the operation noise in the high speed region is eliminated, and by using the contact type switch for detecting the position in the low speed region, the non-contact type switch may be abnormal. Even if the elevator does not operate in the state, the deceleration of the elevator becomes high, but the switch operates mechanically in the low speed region, and the elevator can be reliably stopped at the end floor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a sectional view of the hoistway of an elevator floor safety device. In the figure, 1 is an elevator car, 2 is a car counterweight, 3 is one end fixed to the car 1, and the other end is hoisted. The wire rope is fixed to the counterweight 2 via the machine 3.

On the other hand, on the hoistway side near the uppermost floor, switches 1U to 5U for raising / decelerating commands are arranged via a mounting plate 5. At this time, the switches 1U and 2U that operate at high speed are non-contact type switches, for example, memory switches that operate by magnetic force, Hall elements, or optical sensors, and the switches 3U to 5U that operate at low speed are contact type switches, for example, an alternate type. Install a switch.

Incidentally, on the ascending and descending side near the bottom floor, the deceleration deceleration command switches 1D to 5D are arranged through the mounting plate 6 as well as the non-contact type switch and the contact type switch. Alternate type switches 3U to 5U and 3D to 5D have a structure in which a switch operating roller 7 is provided at the head of the switch, and an operating cam 8 is provided on the side of the car 1 facing the roller 7.
And the switches 1U, 2U, 1 on the car 1.
This is a configuration of a drive device 9 for operating D and 2D, for example, an end floor safety device provided with a magnet and the like.

In the embodiment thus constructed, when the car 1 moves up and the normal deceleration command device (not shown) does not operate, if the car 1 approaches the end floor without decelerating, the car 1
When the driving device 9 of the switch 1 faces the switch 1U,
A sensor (not shown) inside U operates and outputs a deceleration command (or issues a stop command). Further up, switch 2
U also issues a command signal similarly to the switch 1U. Next, the switches 3U to 5U come into contact with the operating cam 8 provided on the car 1,
Sequentially, the operation car 1 will safely land on the end floor. In addition, the end floor safety device on the lowermost floor operates in the same manner as the uppermost floor.

Next, a second embodiment will be described with reference to FIGS.

FIG. 2 is a plan view of the hoistway, FIG. 3 is a sectional view of the hoistway showing the end-floor safety device portion, and FIG. 4 is a perspective view of the end-floor safety switch. On the guide rail 10 of the car 1, a slender long cam 11 and non-contact switches 1U and 2U for ascending / decelerating commands are arranged near the uppermost floor. Further, a long cam 12 and non-contact switches 1D and 2D for descending / decelerating commands are arranged near the bottom floor. Further, the car 1 is provided with a drive device 9 for operating the switches 1U, 2U, 1D, 2D, and a safety switch 13 having a plurality of switches 14U, 14D and operating cams 15U, 15D installed therein. This safety switch 13 is an external roller 1
Driven by 6.

In the operation of the second embodiment, when the car 1 moves up and approaches the end floor without decelerating normally, when the drive device 9 of the car 1 faces the non-contact switch 1U, the switch 1U The internal sensor operates and outputs a deceleration command (or issues a stop command). Further, the switch 2U also rises and issues a command signal similarly to the switch 1U. When the roller 16 of the safety switch 13 and the long cam 11 come into contact with each other when further raised, the roller 16 moves in the UP direction, the inner cam 15U of the safety switch 13 rotates, and the switch 14U is operated to safely land on the end floor. . In addition, the end floor safety device on the lowermost floor operates in the same manner as the uppermost floor.

[0015]

According to the present invention, since the position detection in the high speed region of the elevator is a non-contact type switch, no operation noise is generated, and the position detection in the low speed region is a contact type switch. Even if the non-contact type switch does not operate, the deceleration of the elevator is high, but the elevator can be reliably stopped at the end floor.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hoistway of an elevator floor safety device according to an embodiment of the present invention.

FIG. 2 is a plan view of a hoistway according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a hoistway showing an end floor safety device portion according to a second embodiment of the present invention.

FIG. 4 is a perspective view of an end-floor safety switch.

[Explanation of symbols]

1U, 2U, 1D, 2D ... Non-contact type switch, 3U to 5
U, 3D to 5D ... Contact switch, 8 ... Actuating cam, 9 ...
Drive device, 11, 12 ... Long cam, 13 ... Safety switch.

Claims (4)

[Claims] 1. An elevator end-floor safety device having a plurality of contact switches and non-contact switches installed at positions near both floors in an elevator hoistway. 2. The elevator end floor safety device according to claim 1, wherein position detection in a high speed region of the elevator is performed by the non-contact switch, and position detection in a low speed region is performed by the contact switch. 3. The non-contact switch according to claim 1, wherein the non-contact switch is a memory switch that operates by magnetic force, and the contact switch switches the switch contact when an operating portion is pressed,
When the operation part is released, the operation part returns to the original position, the switch contact is maintained as it is, and when the operation part is pushed again, the end-floor safety constituted by a switch having a structure in which the switch contact is switched apparatus. 4. The end-floor safety device according to claim 1, wherein the non-contact switch is composed of a combination of a magnet provided on a car side and a hall element provided in a hoistway.