Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means
Reexamination Certificate
1999-09-08
2002-01-08
Salata, Jonathan (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
With monitoring, signalling, and indicating means
C187S277000
Reexamination Certificate
active
06336523
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims benefit of priority to Japanese Patent Application Nos. JP10-253990 filed Sep. 8, 1998 and JP10-309962 filed Oct. 30, 1998, 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 without a machine room (penthouse), and which does not require a machine room for installing a controlling device.
2. Description of the Background
In general, an elevator is composed of a cage for accommodating passengers, a hoisting device for driving the cage, a counter weight for balancing the weight, a cable for connecting the cage and the counter weight via the hoisting device, and a controlling device for controlling the overall operation of the elevator. Such an elevator is referred to as a rope type elevator.
As to the space in a building for installing such a rope type elevator, in general, a shaft wherein the cage moves up and down is provided in the building, and an elevator machine room for storing the hoisting device and the controlling device (a control panel) is provided in an annex room at the uppermost part of the shaft. The controlling device necessary for the control of the elevator, including other optional components, has been accommodated in the machine room. Therefore, the primary use of the machine room has been as a place to perform maintenance work on the controlling device.
However, in a condominium or high-rise apartment, a machine room with a sufficient size may not be obtained at the uppermost part of the building due to limitations placed on construction such as the right of light. In this case, a hydraulic type elevator, capable of installing the machine room in the building has been adopted.
However, even in the hydraulic type elevator, a space for the machine room is required in the building, which produces its own set of problems in that the noise and vibration in driving the elevator are significant compared with the rope type elevator, and odor is generated by the use of oil.
One approach to solve such problems is to install an elevator controlling system in the vicinity of an elevator hall or in a cage and store a hoisting device at the uppermost part or the lowermost part of a shaft. For example, the depth of a door pocket, which is an elevator door storing part, in some floors is made longer than that of the other floors to form a storage area for the elevator controlling system.
The storage area for storing the elevator controlling device is provided at the elevator hall side of the door pocket where the hall door is located. The hoisting device is made smaller and thinner so as to be placed in a spare space at the uppermost part or the lowermost part of the elevator shaft. As a result, a building space other than the shaft for moving the cage, is not required. This is referred to as an elevator without a machine room, which has been developed.
Japanese Patent Application Publications (Kokai) No. 59-163270 and No. 2-127387 disclose the controlling device stored in the door pocket of the elevator hall at a certain floor. As to the customer specification, options to be added are limited so that all the controlling device components can be stored basically in the door pocket. Storage spaces for some controlling devices not stored in the door pocket are secured individually in the shaft, and the like.
FIG. 1
is a longitudinal cross-sectional view of a non-prior art elevator shaft concurrently under development by the assignee of the present application for explaining the known elevator controlling system.
FIG. 2
is a lateral cross-sectional view of the shaft of
FIG. 1
viewed from the above to the below.
In the elevator controlling system shown in
FIGS. 1 and 2
, a hoisting device
31
drives a cage
32
and a counter weight
35
via a cable
34
.
The cage
32
moves up and down along two guide rails
36
A,
36
B (the guide rail
36
B is disposed vertically in the elevator shaft opposite the guide rail
36
A). The counter weight
35
moves up and down along two counter weight guide rails
37
A,
37
B.
In order to omit the machine room, the hoisting device
31
is placed on and fixed with a hoisting device mounting base
47
fixed on the uppermost part of the cage guide rail
36
A and the cable
34
lifts the cage
32
by two car sheaves
33
. Similarly, the counter weight
35
is lifted up by a counter weight upper sheave
38
. The cable
34
is fixed with the counter weight cable hitch
39
and a cage cable hitch (not illustrated). On the other hand, a controlling device
42
, which governs the operation of the elevator, is stored and fixed in a door pocket
71
sized to store a hall door
41
in the open state.
According to the configuration. an elevator without a machine room can be realized.
The two car sheaves
33
are provided below the cage
32
, with the cable
34
fixed by the cable hitch (not shown) at the upper part of the cage guide rail
36
B. This is referred to as the 2:1 roping. By placing the hoisting device
31
and the counter weight
35
at the side surface of the cage
32
and adopting the above-mentioned 2:1 roping, the area of the shaft can be made smaller. As a result, the size of the shaft can be decided only with the size of the cage
32
and the size of the hoisting device
31
.
On the other hand, in
FIG. 3A
showing the external appearance of an elevator hall jam
51
on the elevator hall side and
FIG. 3B
showing the cross-section on the elevator hall side, the elevator hall jamb
51
is provided with a controlling device access door
53
in the door pocket in which the hall door
41
is located, and the controlling device
42
is stored inside the access door
53
. Moreover, a hall operation panel
52
is provided on the opposite side. An elevator user operates the elevator by pushing the call button of the hall operation panel
52
.
In general, the controlling device door
53
is provided with a controlling device door key
56
so as not to be opened easily by a user. Further, an opening and closing detector
55
for detecting the opening or closing state of the door
53
is mounted on the controlling device
42
.
However, according to the configuration, since the elevator controlling device
42
is mounted in the vicinity of the elevator hall used by an elevator user, if the controlling device door
53
provided in the jamb
51
, and the like, is opened by mischief, and the like, not only the person who opens the controlling device door
53
but also the users in the cage may be endangered by mistaken or inappropriate operation of the controlling device
42
. That is, if the power source in the controlling device
42
is switched off by mischief, the moving cage is stopped so that the users in the cage are confined.
However, on the other hand, the maintenance worker in maintaining the elevator operation needs to open the controlling device access door
53
to perform maintenance work.
Since the operation can be conducted in a machine room in a conventional rope type elevator, safe operation is allowed without unauthorized access by third persons.
However, since the controlling device
42
is disposed on the elevator hall, the maintenance worker is required to work in the environment where building users, that is, passengers and passers by, come and go, and this can be very dangerous. Since the controlling device
42
is usually applied with three phase voltages of about 200V, it is possible that a child may inadvertently approach the device and receive an electric shock, possibly also endangering the maintenance worker.
Thus, in order to prevent such problems, the controlling device door
53
is provided with the controlling device door key
56
so that a third person cannot easily open it.
Moreover, the opening and closing detector
55
for detecting the door state of opening or closing of the access door
53
and an operation circuit are provided so that the elevator is stopped when the controlling device access door
53
is opened for improving the s
Nakajima Yutaka
Ozeki Akihiro
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