Elevator – industrial lift truck – or stationary lift for vehicle – Having specific force transmitting connection for...
Reexamination Certificate
1999-10-12
2002-08-20
Lillis, Eileen D. (Department: 3652)
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific force transmitting connection for...
C187S408000, C187S414000
Reexamination Certificate
active
06435316
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a rope supporting apparatus for an elevator for supporting ropes for suspending a car and/or a counterweight within a hoist way.
BACKGROUND ART
FIG. 10
is a structural view showing an example of a conventional elevator. In the drawing, a hoist way
1
is formed by a steel structure
2
. Also, a machine room
3
is formed in the vicinity of a bottom portion of the hoist way
1
. Rope holding beams
6
and
7
are mounted on beams
4
and
5
positioned at the upper portion of the steel structure
2
. Rotatable return pulleys
8
and
9
are provided on the rope holding beams
6
and
7
.
A hoisting machine
10
having a sheave
11
is disposed in the machine room
3
. Also, rotatable deflector sheaves
12
and
13
are provided in the machine room
3
. A rope
16
for suspending a car
14
and a counterweight
15
within the hoist way
1
is laid around the sheave
11
and directed by the return pulleys
8
and
9
through the deflection sheaves
12
and
13
and is caused to pass below suspension sheaves
17
and
18
provided on the car
14
and the counterweight
15
. Both end portions of the rope
16
are fixed to the rope holding beams
6
and
7
through fastening members
19
, respectively.
In such an elevator, the sheave
11
is rotated forward or reversely by a drive force of the hoisting machine
10
so that the car
14
and the counterweight
15
are alternatively moved up and down within the hoist way
1
.
In the example shown in
FIG. 10
, the hoist way
1
is formed by the steel structure
2
. However, in the case where the hoist way is formed of concrete, concave/convex portions for supporting both end portions of the rope holding beams are provided on the walls of the hoist way. Then, both end portions of the rope holding beams are fixed to shoulder portions of the concave/convex portions.
However, in the above-described conventional elevator, the beams
4
and
5
or concave/convex portions for supporting the rope holding beams
6
and
7
must be provided and, in the case of the concrete structure in particular, discussions have to be held between the building designers and builders and the elevator company, and additional work for providing the concave/convex portions on the hoist way walls must be carried out. Consequently, the period of time required for construction is lengthened and at the same time, construction costs are increased.
In contrast, Hatsumei Kyokai Technical Disclosure Bulletin No. 90-9351, for example, discloses a rope end fixing device in which a member to which the end portions of a rope are fixed may be mounted on a guide rail for guiding the vertical movement of the car and/or counterweight.
FIG. 11
is a front view showing an example of a conventional rope end fixing device. In the drawing, a guide rail
21
for guiding the vertical movement of the car or the counterweight is fixed in place through a plurality of brackets
22
. A rope end fixing member
24
is fixed through, for example, a plurality of support bodies
23
having bolt-and-nut assemblies. End portions of a plurality of ropes
16
are fixed to the rope end fixing member
24
through fastening members
19
, respectively.
In the rope end fixing device having the support body
23
and the rope end fixing member
24
, since a tension T to be applied to an end portion of each rope
16
is eccentric to a cross sectional center line C of the guide rail
21
, a bending moment is applied to the guide rail
21
. For this reason, it is necessary to prevent the bending moment from deforming the guide rail
21
by increasing the cross sectional area of the guide rail
21
or decreasing the spacing between the rail brackets
22
, increasing the manufacturing and installation costs.
DISCLOSURE OF THE INVENTION
In order to solve the above mentioned problems, an object of the present invention is to provide a rope supporting apparatus for an elevator which is able to reduce any bending moment that applied to a guide rail.
A rope supporting apparatus for an elevator according to the present invention comprises: a column-like body extending along a guide rail installed within a hoist way and mounted on the guide rail; a rope supporting member fixed to the column-like body for supporting a rope suspending at least one of a car and a counterweight within the hoist way; and a plurality of support bodies provided between both end portions of the column-like body and the guide rail for transmitting a load from the column-like body to the guide rail.
REFERENCES:
patent: 3666051 (1972-05-01), Davis et al.
patent: 4079816 (1978-03-01), Ohta
patent: 5878847 (1999-03-01), Mustalahti et al.
patent: 6021873 (2000-02-01), Aulanko et al.
patent: 6234276 (2001-05-01), Wagatsuma et al.
patent: 56-62380 (1981-04-01), None
patent: 59-40276 (1984-03-01), None
patent: 5-229766 (1993-09-01), None
patent: WO96/09978 (1996-04-01), None
Leydig & Voit & Mayer
Lillis Eileen D.
Mitsubishi Denki & Kabushiki Kaisha
Tran Thuy V.
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