Elevator – industrial lift truck – or stationary lift for vehicle – With safety or sealing means for gap between load support...
Reexamination Certificate
1999-09-07
2001-03-27
Hess, Douglas (Department: 3652)
Elevator, industrial lift truck, or stationary lift for vehicle
With safety or sealing means for gap between load support...
C187S394000, C187S291000
Reexamination Certificate
active
06206143
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims benefit of priority to Japanese Patent Application Nos. JP10-252680 filed Sep. 7, 1998, and JP11-046391 filed Feb. 24, 1999, the entire disclosure of which is incorporated by reference herein.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an elevator including a cage suspended by a cable and configured to move up and down in an elevator shaft of a building, and in particular relates to a landing apparatus for positioning the cage at a position where the doorsill part of the elevator hall is flush with the doorsill part of the cage.
2. Description of the Background
A conventional landing apparatus
91
for an elevator
81
shown in
FIGS. 1 and 2
is composed of a detector
92
provided on an upper part of a cage
84
, and a detecting plate
94
mounted on a guide rail
83
via an arm
93
. The detector
92
is composed of a signal generating part
95
and a signal receiving part
96
, facing opposite each other with an interval existing therebetween. The signal generating part
95
generates a signal toward the signal receiving part
96
.
The detecting plate
94
, which is made of a material to block the signal generated by the signal generating part
95
, is provided at the position on the guide rail
83
side to be interposed between the signal generating part
95
and the signal receiving part
96
when the doorsill part of the elevator hall and the doorsill part of the cage
84
become flush with each other.
When the detecting plate
94
is interposed between the signal generating part
95
and the signal receiving part
96
so that the signal generated from the signal generating part
95
is not received by the signal receiving part
96
, the landing apparatus
91
stops the cage
84
for positioning the same at the position where the doorsill parts can be flush with each other.
Japanese Patent Application Publication (koukoku) No. 64-6110 discloses another conventional landing apparatus
101
composed of a detector
102
provided in a doorsill part
85
of a cage
84
and a detected member
103
provided in a doorsill part
87
of an elevator hall
86
. The detector
102
and the detected member
103
are provided such that they face opposite each other when the cage
84
is placed at a position where the doorsill parts
85
,
87
are flush with each other.
The detector
102
is composed of a signal generating part for generating a signal and a signal receiving part for receiving the signal. The detected member
103
a reflector which reflects the signal generated from the signal generating part so as to guide the signal to the signal receiving part.
When the detector
102
and the detected member
103
face with each other, the landing apparatus
101
operates a driving device (not illustrated) so as to stop the cage
84
at the position where the doorsill parts
85
,
87
are flush with each other. At this time, a signal generated from the signal generating part is reflected by the detected member
103
so as to be received by the signal receiving part.
The landing apparatus
91
of the elevator
81
shown in
FIGS. 1 and 2
requires a slight adjustment of the position along the vertical direction of the detecting plate
94
upon installing the elevator
81
in the elevator shaft in the building for stopping the cage
84
at the position where the doorsill parts are flush with each other.
Moreover, the positions of the detector
92
and the detecting plate
94
need to be adjusted such that the detecting plate
94
can pass between the signal generating part
95
and the signal receiving part
96
without contacting the detector
92
when the cage
84
moves up and down. These adjustments add labor to the installation, as a result of which the installation cost tends to rise.
Furthermore, since the landing apparatus
101
disclosed in Japanese Patent Application Publication (koukoku) No. 64-6110 is provided with the detector
102
and the detected member
103
in a small space defined by the doorsill part
85
of the cage
84
and the doorsill part
87
of the elevator hall
86
, respectively, a signal generated from the signal generating part of the detector
102
can be reflected by the wall surface of the elevator shaft or an apron attached on the elevator hall
86
.
Therefore, due to a malfunction caused by the signal receiving part receiving a signal reflected by the wall surface of the elevator shaft or the apron, sometimes the cage
84
cannot be positioned at the predetermined position.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a novel elevator landing apparatus, capable of installation with reduced labor so as to lower the installation cost, and capable of preventing malfunction so as to reliably position the cage at a position where the doorsill parts of the elevator hall and the cage are flush with each other.
This and other objects are achieved according to the present invention by providing an elevator landing apparatus including a detector mounted on one of a doorsill part of a cage of an elevator provided in an elevator shaft and a doorsill part of an elevator hall, and a detected member mounted on the other of the doorsill part of the elevator hall and the doorsill part of the cage. The detector and detected member are configured to position the cage at a position where the doorsill part of the elevator hall and the doorsill part of the cage are flush with each other when the detector and the detected member are opposite each other. The one of the detector or the detected member provided on the doorsill part of the cage is mounted along a side of the cage and facing toward a side of the elevator shaft. The other of the detected member or detector provided on the doorsill part of the elevator hall is mounted extending from the doorsill part of the elevator hall to be opposite the one of the detector or detected member mounted along the side of the cage between the side of the elevator shaft and the one of the detector or detected member mounted along the side of the cage.
REFERENCES:
patent: 4019606 (1977-04-01), Caputo et al.
patent: 4683990 (1987-08-01), Wright
patent: 4750592 (1988-06-01), Watt
patent: 5135081 (1992-08-01), Watt et al.
patent: 5347094 (1994-09-01), Leone et al.
patent: 5360085 (1994-11-01), Yoo et al.
patent: 5509505 (1996-04-01), Steger et al.
patent: 6006866 (1999-12-01), Horne et al.
patent: 6050369 (2000-04-01), Leone et al.
patent: 64-6110 (1989-02-01), None
Hess Douglas
Kabushiki Kaisha Toshiba
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Tran Thuy U.
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