[0001] The present invention relates to a laterally suspending structure for an elevator
car, and particularly to a laterally suspending structure of an elevator car of a
type having its entire width smaller than that of a balance weight.
[0002] In general, a structure for suspending an elevator car is of a roof suspending type
as shown in Fig. 2, in order to stabilize the attitude of the elevator car during
movement.
[0003] Accordingly, in the case of the above-mentioned conventional roof suspending type
elevator, it has been necessary to ensure a space for attaching a rope fastening support
member projected from the upper surface of the roof section of the car, and accordingly,
there has been caused a problem such that the moving stroke of the car is inevitably
decreased by a value corresponding to the attaching space.
[0004] One object of the present invention is to provide an elevator having a moving stroke
which is greater than that of a roof suspending type elevator car, within a fixed
moving space.
[0005] To attain the above-mentioned object, in an elevator according the present invention,
there is provided a laterally suspending structure for an elevator car composed of
support members secured to both side surfaces of the elevator car and rope fastening
members supported and secured to the upper end faces of the support members, the rope
fastening members for suspending the car being set at a level slightly lower than
that that of the roof surface of the car.
[0006] With the laterally suspending structure for the elevator car arranged as mentioned
above, the fastening rope fastening ends are set at a level slightly lower than that
of the upper surface of the roof of the car. Further, due to that the rope fastening
members secured to the support members are arranged at equal distances with respect
to the vertical line passing through the gravitational center of the car, suitable
blancing is taken for suspending the car.
[0007] In an embodiment, referring to the drawings in which Figs. 1 and 2 show an elevator
using a cylindrical linear motor, Fig. 1 is a schematic perspective view illustrating
a laterally suspending structure for a car according to the present invention, and
Fig. 2 is a schematic perspective view illustrating a conventional roof suspending
type structure for a car. Referring to Fig. 1, an elevator car 1 is fastened to first
ends of ropes 3 by rope fastening members 2. These rope fastening members 2 are tightly
fixed to support members 20 arranged on both side surfaces of the upper section of
the car at a level slightly lower than the upper surface of the roof of the car. Meanwhile,
the second ends of the ropes 3 are fastened to rope fastening members 7 secured to
the upper end of a balance weight 6, the ropes 3 being guided about first sheaves
4 and second sheaves 5 which are rotatably supported in the upper section of a building.
The first sheaves 4 and the second sheaves 5 are supported to sheave support beams
9 in an elevator machine room by means of of sheave shafts 8. The car has car guide
rollers 11 attached to both sides thereof and engaged with car guide rails 10. Meanwhile,
a balance weight has balance weight guide rollers 13 engaged with balance weight guide
rails 12. The balance weight 6 is arranged so as to carry out linear motion in the
vertical direction along a column 18 which is supported at both ends thereof to an
upper end support part 15 fixed a ceiling beam 14 and a lower end support part 17
fixed to a floor frame 16, the column 18 being the secondary conductor of a linear
induction motor. Reference numeral 19 denotes the primary conductor of the induction
motor carrying out linear motion. In the case of the linear induction motor shown
in this embodiment, it is of a type such that the secondary conductor is held at the
position of installation while the primary conductor alone carries out linear motion.
With this arrangement, in the case of the laterally suspending type elevator according
to the present invention, in a predetermined movable space for the car, it is possible
to obtain a moving stroke which is greater than that of the elevator of the type in
which the car is suspended at its roof, as shown in Fig. 2. This is due to the provision
of the attaching spaces on the side surfaces of the car instead of the provision of
the attaching space for the support member which projects from the upper surface of
the roof of the car in the roof suspending type elevator.
[0008] The present invention is optimum particularly for an elevator of such a type that
the entire width of a car is smaller than that of the balance weight.
[0009] Further, although the present invention has been explained in the above-mentioned
embodiment using a cylindrical linear motor driven elevator, the laterally suspending
structure for a car, according to the present invention should not be limited to the
cylindrical shape linear motor driven elevator, and the present invention can be applied
for every type of elevators.
[0010] The present invention can be practices in various forms without departing the sprit
and main principal of the present invention.
[0011] The present invention is arranged as mentioned above, and therefore offers the following
advantages.
[0012] Since the rope fastening ends for the car are set at a level slightly lower than
that of the upper surface of the roof of the car, the moving stroke of the car within
a predetermined moving space can be made to be maximum. Further, the rope fastening
members are arranged at equal distances with respect to the vertical line passing
through the gravitational center of the car, and accordingly, optimum balancing is
taken for suspending the car.
[0013] Fig. 1 is a schematic perspective view illustrating an elevator having a laterally
suspending structure according to the present invention; and Fig. 2 is a schematic
perspective view illustrating a conventional car roof suspending type elevator.
1. A laterally suspending structure for an elevator car composed of support members
secured to both side surfaces of an elevator car and rope fastening members supported
and secured to the upper surfaces of the support members, the rope fastening members
for suspending said car being set at a level slightly below the roof surface of said
car.
2. A laterally suspending structure for an elevator car as set forth in claim 1, wherein
said support members are positioned at equal distances on both side surfaces of said
elevator car with respect to the vertical line passing through the gravitational center
of said car.
