Background of the Invention
Field of the Invention
[0001] The present invention relates to an elevator system, and more particularly, to an
elevator system in which a main cable connecting a car to a counterweight is driven
by a hoisting machine disposed on top of the car.
Background Art
[0002] FIGS. 22 and 23 show a conventional elevator system described in; for example, Japanese
Patent Application Laid-Open No. Hei-10-114481, wherein FIG. 22 is a conceptual longitudinal
cross-sectional view, and FIG. 23 is an enlarged view showing a portion "A" shown
in FIG. 22. In the drawings, reference numeral 1 designates a shaft; and 2 designates
a car which travels vertically along a predetermined path within the shaft 1. A service
recess 3 is formed in a lower portion of the car 2, and an access door 4 is formed
in an upper surface of the service recess 3. A seat plate 5 equipped with a cushion
is removably provided on the service recess 3 so as to cover the access door 4. Reference
numeral 6 designates a hoisting machine disposed on the bottom of the shaft 1 so as
to correspond to the position of the service recess 3. The hoisting machine 6 moves
the car 2 vertically by way of a cable 7.
[0003] In the conventional elevator system of the above-described configuration, the hoisting
machine 6 is energized to move the car 2 vertically along a predetermined path within
the shaft 1 by way of the cable 7. The seat plate 5 is removed while the car 2 is
situated at its lowermost position, and in the car 2 a service engineer conducts an
inspection of and performs maintenance of the hoisting machine 6 by way of the access
door 4.
[0004] FIG. 24 is a longitudinal cross-sectional view conceptually showing another conventional
elevator system described in, for example, Japanese Utility Model Publication No.
Hei-3-48142. In the drawing, reference numeral 1 designates a shaft; 2 designates
a car which travels vertically along a predetermined path within the shaft 1; and
6 designates a traction machine. The traction machine 6 is disposed on the lower surface
of an upper beam of the car 2, along with a sheave 8 whose rotor axis is oriented
in the horizontal direction.
[0005] Reference numeral 9 designates a counterweight which is moved vertically along another
predetermined path within the shaft 1; and 10 designates a counterweight pulley provided
on the counterweight 9. Reference numeral 11 designates a top pulley which is rotatively
fixed to the top of the shaft 1 and whose rotor axis is oriented horizontally; and
12 designates a main cable. One end of the main cable 12 is connected to the upper
end of the shaft 1 by means of an anchor 13, and the other end of the main cable 12
is connected to the upper end of the shaft 1 by means of another anchor 14. The main
cable 12 is wound around the counterweight pulley 10, the top pulley 11, and the sheave
8, in the sequence given.
[0006] In the conventional elevator system of the foregoing configuration, when the hoisting
machine 6 is energized, the sheave 8 is rotated, to thereby move the car 2 and the
counterweight 9 in opposite directions by way of the main cable 12. Since the hoisting
machine 6 is mounted on the car 2, a machinery room, which would otherwise be independently
provided at a position above the shaft 1, is omitted, thus reducing the space occupied
by the elevator system within an un-illustrated building.
[0007] In the conventional elevator system shown in FIGS. 22 and 23, a service engineer
conducts an inspection of and performs maintenance of the hoisting machine 6 in the
car 2 while stooping over the hoisting machine 6. Such a stooped posture deteriorates
the ability of the service engineer to work. Further, the service engineer must pay
careful attention so as to avoid accidentally dropping a tool or a like instrument
down into the shaft 1, thus deteriorating the effectiveness of maintenance. In the
event of the lower portion of the shaft 1 being flooded, the hoisting machine 6 may
be damaged by water.
[0008] Alternatively, in the conventional elevator system shown in FIG. 24, the hoisting
machine 6 is disposed at an elevated position with reference to the car 2. The service
engineer squeezes into and bends his body within a narrow space formed between the
roof of the car 2 and the hoisting machine 6 and conducts an inspection of and performs
maintenance of the hoisting machine 6. Such an unnatural posture deteriorates the
effectiveness of maintenance. Further, the service engineer must pay careful attention
so as to avoid accidentally dropping a tool or a like instrument in the shaft 1, thus
deteriorating the effectiveness of maintenance.
Summary of the Invention
[0009] The present invention has been conceived to solve a problem in the conventional elevator
systems as described above, and the object of the present invention is to provide
an elevator system which includes a car having a hoisting machine provided thereon
and enables a service engineer to readily perform maintenance of the hoisting machine.
[0010] According to one aspect of the present invention, an elevator system comprises a
car which travels vertically along a predetermined path within a shaft. A counterweight
is provided which travels vertically along another predetermined path within the shaft,
and the counterweight has a pulley mounted thereon. A hoisting machine including a
sheave is provided on the exterior side surface of the car, and the rotor axis of
said sheave is oriented horizontally. A top pulley is rotatively mounted on the upper
end of the shaft with the rotor axis thereof oriented horizontally. A main cable is
connected to the upper end of the shaft at both ends thereof respectively, and the
main cableis wound around said pulley mounted on the counterweight, the top pulley,
and the sheave. Further, an access port is provided on the side surface of the car
corresponding to the hoisting machine to be subjected to maintenance.
[0011] Other and further objects, features and advantages of the invention will appear more
fully from the following description.
Brief Description of the Drawings
[0012]
FIG. 1 is a conceptual transverse plan view showing an elevator system according to
a first embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view conceptually showing a suspended state
of the main cable of the elevator system shown in FIG. 1;
FIG. 3 is a cross-sectional plan view taken along line B-B shown in FIG. 2;
FIG. 4 is a front view showing the hoisting machine when the door of maintenance means
is opened at the deep-inside wall of a car shown in FIG. 1;
FIG. 5 is a conceptual transverse plan view showing an elevator system according to
a second embodiment of the present invention;
FIG. 6 is a conceptual transverse plan view showing an elevator system according to
a third embodiment of the present invention;
FIG. 7 is a longitudinal cross-sectional view conceptually showing the suspended state
of the main cable of the elevator system shown in FIG. 6;
FIG. 8 is a conceptual transverse plan view showing an elevator system according to
a fourth embodiment of the present invention;
FIG. 9 is a conceptual transverse plan view showing an elevator system according to
a fifth embodiment of the present invention;
FIG. 10 is a longitudinal cross-sectional view conceptually showing the suspended
state of the main cable of the elevator system shown in FIG. 9;
FIG. 11 is a conceptual transverse plan view showing an elevator system according
to a sixth embodiment of the present invention;
FIG. 12 is a conceptual transverse plan view showing an elevator system according
to a seventh embodiment of the present invention;
FIG. 13 is a longitudinal cross-sectional view conceptually showing a suspended state
of the main cable of the elevator system shown in FIG. 12;
FIG. 14 is a transverse plan view showing a section of the elevator system shown in
FIG. 12.
FIG. 15 is a conceptual transverse plan view showing an elevator system according
to an eighth embodiment of the present invention;
FIG. 16 is a transverse plan view showing a section of the elevator system shown in
FIG. 15;
FIG. 17 is a conceptual transverse plan view showing an elevator system according
to a ninth embodiment of the present invention;
FIG. 18 is a longitudinal cross-sectional view conceptually showing a suspended state
of the main cable of the elevator system shown in FIG. 17;
FIG. 19 is a conceptual transverse plan view showing an elevator system according
to a tenth embodiment of the present invention;
FIG. 20 is a longitudinal cross-sectional view conceptually showing a suspended state
of the main cable of the elevator system shown in FIG. 19;
FIG. 21 is a conceptual transverse plan view showing an elevator system according
to an eleventh embodiment of the present invention;
FIG. 22 is a conceptual longitudinal cross-sectional view of a conventional elevator
system; and
FIG. 23 is an enlarged view showing a portion "A" shown in FIG. 22.
FIG. 24 is a longitudinal cross-sectional view conceptually showing another conventional
elevator system.
Detailed Description of the Preferred Embodiments
[0013] Preferred embodiments of the present invention will be described hereinafter with
reference to the accompanying drawings, in which same reference numerals indicate
same or corresponding portions or elements.
First Embodiment
[0014] FIGS. 1 through 4 show an elevator system according to a first embodiment of the
present invention. FIG. 1 is a conceptual transverse plan view showing an elevator
system; FIG. 2 is a longitudinal cross-sectional view conceptually showing a suspended
state of the main cable of the elevator system shown in FIG. 1; FIG. 3 is a cross-sectional
plan view taken along line B-B shown in FIG. 2; and FIG. 4 is a front view showing
the hoisting machine when the door of maintenance means is opened at the deep-inside
wall of a car shown in FIG. 1.
[0015] In the drawings, reference numeral 1 designates a shaft; 2 designates a car which
travels vertically along a predetermined path within the shaft 1; 15 designates an
entrance door of the car 2; 16 designates a deep-inside wall or a back wall opposite
the entrance door 15 of the car 2; 17 designates an access port which is formed in
the deep-inside wall 16 and between reinforcement members 161 provided on the back
of the deep-inside wall 16; and 18 designates a door for opening or closing the access
port 17. Reference numeral 19 designates maintenance means or maintenance ensemble
constituted of the access port 17 and the door 18.
[0016] Reference numeral 6 designates a traction machine having a small depth dimension.
The traction machine 6 is disposed on the exterior side surface of the car 2, or in
other words, on the exterior side of the deep-inside wall 16. The traction machine
6 is situated at the position of the access port 17. A base body 20 is provided so
as to correspond to the access port 17, and is fastened to the reinforcement members
161 disposed on opposite sides of the access port 17. A support plate 21 is disposed
vertically at a position close to the access port 17 such that a space is formed between
the support plate 21 and the base body 20, and the edge of the support plate 21 is
fastened to the base body 20. One end of a support shaft 22 is supported by the base
body 20, and the other end of the support shaft 22 is supported by the support plate
21. The axis of the support shaft 22 is oriented horizontally.
[0017] The hoisting machine 6 comprises a stator winding 23, an armature 24, a rotor 26,
and an electromagnetic brake 28. The stator winding 23 is provided at a position close
to the support plate 21 on the base member 20. The armature 24 is rotatively supported
on the support shaft 22 by way of ball bearings and is disposed opposite the stator
winding 23, to thereby constitute an electric motor. The rotor 26 is disposed at an
inner position in the base member 20, and a sheave 25 is formed on the rotator 26.
The electromagnetic brake 28 is disposed on the support plate 21 and comprises brake
pads 27. The brake pads 27 are disposed opposite the interior surfaces of the areas
of the rotor 26 where the armature 24 is situated, with a clearance "g" shown in FIG.
3 being formed therebetween.
[0018] Reference numeral 9 designates a counterweight which travels vertically along another
predetermined path within the shaft 1, and is disposed so as to correspond to the
deep-inside wall 16. Reference numeral 10 designates a counterweight pulley provided
on the counterweight 9. Reference numeral 11 designates a top pulley which is rotatively
attached to the upper end or the roof of the shaft 1, and whose rotor axis is oriented
horizontally. Reference numeral 12 designates a main cable. One end of the main cable
12 is connected to the upper end of the shaft 1 by means of an anchor 13, and the
other end of the main cable 12 is connected to the upper end of the shaft 1 by means
of another anchor 14. The main cable 12 is wound around the counterweight pulley 10,
the top pulley 11, and the sheave 25, in the sequence given. Reference numeral 29
designates a service engineer who conducts an inspection of the hoisting machine 6
by way of the maintenance means 19 while in the car 2.
[0019] In the elevator system of the foregoing configuration, when the hoisting machine
6 is energized, the sheave 25 is rotated, to thereby move the car 2 and the counterweight
9 in opposite directions by way of the main cable 12. The hoisting machine 6 is disposed
on the exterior side surface of the car 2, and the maintenance means 19 is provided
on the wall of the car 2. Accordingly, as shown in FIGS. 1 and 3, the service engineer
29 opens the door 18 and conducts an inspection of and performs maintenance on the
hoisting machine 6 by way of the access port 17 by means of an operation performed
in the car 2.
[0020] Thus, the service engineer 29 does not need to stoop to inspect the hoisting machine
6 and can perform operation while in a natural posture. Further, the service engineer
29 is not required to pay special attention so as to avoid accidentally dropping a
tool or a like instrument into the shaft 1, thereby improving the efficiency of maintenance.
Further, since the hoisting machine 6 is disposed on the exterior side surface of
the car 2, there can be prevented damage to the hoisting machine 6 by flood, which
would otherwise be caused when the lower portion of the shaft 1 is flooded.
Second Embodiment
[0021] FIG. 5 is a conceptual transverse plan view showing an elevator system according
to a second embodiment of the present invention. The remaining portions of the elevator
system of the present embodiment other than those illustrated in FIG. 5 are built
in the same manner as shown in FIGS. 1 through 4. In FIG. 5, those reference numerals,
which are the same as those provided in FIGS. 1 through 4, designate corresponding
elements. Reference numeral 30 designates a sidewall continually connected to the
entrance door 15 of the car 2. Reference numeral 9 designates a counterweight which
is provided within the shaft 1 and is disposed so as to correspond to the sidewall
30. Reference numeral 6 designates a hoisting machine disposed on the car 2, more
specifically, on the exterior side surface of the sidewall 30. Reference numeral 19
designates maintenance means disposed on the sidewall 30 so as to correspond to the
hoisting machine 6.
[0022] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the second embodiment shown in FIG. 5 yields the same
working-effect as that yielded in the first embodiment shown in FIGS. 1 through 4.
Third Embodiment
[0023] FIGS. 6 and 7 show an elevator system according to a third embodiment of the present
invention. FIG. 6 is a conceptual transverse plan view showing an elevator system,
and FIG. 7 is a longitudinal cross-sectional view conceptually showing the suspended
state of the main cable of the elevator system shown in FIG. 6. The remaining portions
of the elevator system of the present embodiment other than that portion illustrated
in FIGS. 6 and 7 are constructed in the same manner as shown in FIGS. 1 through 4.
[0024] In the drawings, those reference numerals, which are the same as those provided in
FIGS. 1 through 5, designate corresponding elements. Reference numeral 31 designates
a deflector wheel rotatively attached to the exterior side surface of the sidewall
30 of the car 2 at a lower portion than the hoisting machine 6. Reference numeral
32 designates a first lower pulley which is rotatively mounted on the lower exterior
surface of the car 2 close to its edge at a position under the hoisting machine 6,
and is disposed so as to correspond to the sheave 25. Reference numeral 33 designates
a second lower pulley which is rotatively mounted on the other side of the lower exterior
surface of the car 2 close to the other edge apart from the hoisting machine 6, and
is disposed at a position closer to the entrance door 15 than is the first lower pulley
32.
[0025] Reference numeral 34 designates a position (hereinafter referred to as a "rear-end
suspension position") where the rear portion of the car 2 is suspended by the main
cable 12 extending between the deflector wheel 31 and the top pulley 11. Reference
numeral 12 designates a main cable. One end of the main cable 12 is attached to the
upper end of the shaft 1 by means of the anchor 13, and the other end of the main
cable 12 is attached to the upper end of the shaft 1 at a position corresponding to
the location of the second lower pulley 33 by means of another anchor 14. The main
cable 12 is wound around the counterweight pulley 10, the top pulley 11, the rear-end
suspension position 34 on the deflector wheel 31, the sheave 25, the first lower pulley
32, and the second lower pulley 33, in the sequence given.
[0026] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior surface of the side wall 30 of the car 2, and the maintenance
means 19 is provided on the wall surface of the car 2. Accordingly, although not described
in detail, the elevator system of the third embodiment shown in FIGS. 6 and 7 yields
the same working-effect as that yielded in the embodiment shown in FIGS. 1 through
4.
[0027] In the third embodiment shown in FIGS. 6 and 7, the car 2 is suspended by the main
cable 12 by way of the first lower pulley 32 and the second lower pulley 33. The anchor
14 suspends the front side of the car 2, and the rear portion of the car 2 is suspended
by the main cable 12 in the rear-end suspension position 34. More specifically, the
car 2 is suspended by the main cable 12 at the rear-end suspension position 34 formed
on the deflector wheel 31, as well as at the position on the lower surface of the
car 2 which is spaced apart from the rear-end suspension position 34 in a diagonal
direction. As a result, the portion of the car 2 close to its center of gravity is
suspended, thereby diminishing an offset load exerted on the car 2 and an offset load
exerted on a rail for guiding the car 2. Consequently, the structure of the elevator
system can be simplified, and cost required for constructing the elevator system can
be reduced.
Fourth Embodiment
[0028] FIG. 8 is a conceptual transverse plan view showing an elevator system according
to a fourth embodiment of the present invention. The remaining portions of the elevator
system of the present embodiment other than that portion illustrated in FIG. 8 are
constructed in the same manner as shown in FIGS. 1 through 4 and FIGS. 6 and 7. In
the drawings, those reference numerals, which are the same as those provided in FIGS.
1 through 7, designate corresponding elements. Reference numeral 9 designates a counterweight
which is disposed within the shaft 1, and is positioned so as to correspond to the
sidewall 30 neighboring the entrance door 15; and 6 designates a hoisting machine
which is provided on the car 2; more specifically, on the exterior side surface of
the sidewall 30.
[0029] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the fourth embodiment shown in FIG. 8 yields the same
working-effect as that yielded in the embodiment shown in FIGS. 1 through 4.
[0030] In the fourth embodiment shown in FIG. 8, the car 2 is suspended by the main cable
12 by way of the first lower pulley 32 and the second lower pulley 33. The anchor
14 suspends the front side of the car 2, and the rear portion of the car 2 is suspended
by the main cable 12 in the rear-end suspension position 34. More specifically, the
car 2 is suspended by the main cable 12 at the rear-end suspension position 34 formed
on the deflector wheel 31, as well as at the position on the lower surface of the
car 2 which is spaced apart from the rear-end suspension position 34 in a diagonal
direction. As a result, the portion of the car 2 close to its center of gravity is
suspended, thereby diminishing an offset load exerted on the car 2 and an offset load
exerted on a rail for guiding the car 2. Consequently, the structure of the elevator
system can be simplified, and cost required for constructing the elevator system can
be decreased.
Fifth Embodiment
[0031] FIGS. 9 and 10 show an elevator system according to a fifth embodiment of the present
invention. FIG. 9 is a conceptual transverse plan view showing an elevator system,
and FIG. 10 is a longitudinal cross-sectional view conceptually showing the suspended
state of the main cable of the elevator system shown in FIG. 9. The remaining portions
of the elevator system of the present embodiment other than that portion illustrated
in FIGS. 9 and 10 are constructed in the same manner as shown in FIGS. 1 through 4.
[0032] In the drawings, those reference numerals, which are the same as those provided in
FIGS. 1 through 4, FIGS. 6 and 7, designate corresponding elements. Reference numeral
31 designates a deflector wheel which is rotatively disposed on the exterior side
surface of the deep-inside wall 16 of the car 2 at a position higher than the hoisting
machine 6 mounted on the exterior side surface of the deep-inside wall 16. Reference
numeral 35 designates a first side pulley which is rotatively mounted on a sidewall
30 continually connected to the deep-inside wall 16 of the car 2. The first side pulley
35 is disposed in a lower portion of the sidewall 30 so as to correspond to the deflector
wheel 31 disposed on the deep-inside wall 16. Reference numeral 36 designates a second
side pulley which is rotatively mounted on the sidewall 30 and is disposed at a position
closer to the entrance door 15 than is the first side pulley 35.
[0033] Reference numeral 12 designates a main cable. One end of the main cable 12 is attached
to the upper end of the shaft 1 by means of the anchor 13, and the other end of the
main cable 12 is attached to the upper end of the shaft 1 at a position corresponding
to the location of the second side pulley 36, by means of another anchor 14. The main
cable 12 is wound around the counterweight pulley 10, the top pulley 11, the rear-end
suspension position 34 on the sheave 25, the deflector wheel 31, the first side pulley
35, and the second side pulley 36, in the sequence given.
[0034] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the fifth embodiment shown in FIGS. 9 and 10 yields
the same working-effect as that yielded in the embodiment shown in FIGS. 1 through
4.
[0035] In the fifth embodiment shown in FIGS. 9 and 10, the car 2 is suspended by the main
cable 12 by way of the first side pulley 35 and the second side pulley 36. The anchor
14 suspends the front side of the car 2, and the rear portion of the car 2 is suspended
by the main cable 12 at the rear-end suspension position 34. More specifically, the
car 2 is suspended by the main cable 12 at the rear-end suspension position 34 formed
on the deflector wheel 31, as well as at the position on the lower surface of the
car 2 which is spaced apart from the rear-end suspension position 34 in a diagonal
direction. As a result, the portion of the car 2 close to its center of gravity is
suspended, thereby diminishing an offset load exerted on the car 2 and an offset load
exerted on a rail for guiding the car 2. Consequently, the structure of the elevator
system can be simplified, and cost required for constructing the elevator system can
be decreased.
[0036] Since the lower ends of the respective first and second side pulleys 35 and 36 are
located at a position higher than the lower surface of the car 2, the pit of the shaft
1 can be made shallow. Further, a margin for elevation of the car 2, which is ensured
in the upper portion of the shaft 1, can be made small. In other words, an upper margin
space originating from the highest stopping position of the car 2 within the shaft
1 or a lower margin space originating from the lowest stopping position of the car
2 can be diminished, thus shortening the overall length of the shaft 1. Accordingly,
cost incurred for constructing the shaft 1 and installing the elevator system in the
shaft 1 can be reduced. In the fifth embodiment, it is obvious that the same working-effect
can be yielded even when the positions of the hoisting machine 6 and the deflector
wheel 31 are switched.
Sixth Embodiment
[0037] FIG. 11 is a conceptual transverse plan view showing an elevator system according
to a sixth embodiment of the present invention. The remaining portions of the elevator
system of the present embodiment other than those portion illustrated in FIG. 11 are
constructed in the same manner as shown in FIGS. 1 through 4 and FIGS. 9 and 10. In
the drawings, those reference numerals which are the same as those provided in FIGS.
9 and 10 designate corresponding elements. Reference numeral 9 designates a counterweight
which is disposed within the shaft 1 and is positioned so as to correspond to the
sidewall 30.
[0038] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the sixth embodiment shown in FIG. 11 yields the same
working-effect as that yielded in the embodiment shown in FIGS 1 through 4, as well
as the same working-effect as that yielded in the embodiment shown in FIGS. 9 and
10.
Seventh Embodiment
[0039] FIGS. 12 through 14 show an elevator system according to a seventh embodiment of
the present invention. FIG. 12 is a conceptual transverse plan view showing an elevator
system; FIG. 13 is a longitudinal cross-sectional view conceptually showing a suspended
state of the main cable of the elevator system shown in FIG. 12; and FIG. 14 is a
transverse plan view showing a section of the elevator system shown in FIG. 12. The
remaining portions of the elevator system of the present embodiment other than those
portions illustrated in FIGS. 12 through 14 are constructed in the same manner as
shown in FIGS. 1 through 4.
[0040] In the drawings, those reference numerals which are the same as those provided in
FIGS. 1 through 4 designate corresponding elements. Reference numeral 9 designates
a counterweight which is interposed between the deep-inside wall 16 of the car 2 and
the interior sidewall of the shaft 1. When viewed in the horizontal plane of projection,
an indentation 37 is formed in one side of the counterweight 9 for permitting the
hoisting machine 6 provided on the exterior side surface of the deep-inside wall 16
of the car 2 to pass through. Reference numeral 10 designates a first counterweight
pulley which is rotatively mounted on one side of the counterweight 9, as viewed in
the horizontal plane of projection. Further, reference numeral 101 designates a second
counterweight pulley which is rotatively mounted on the other side of the counterweight
9, as viewed in the horizontal plane of projection.
[0041] Reference numeral 11 designates a first top pulley which is rotatively mounted on
the roof of or at an upper end of the shaft 1 at a position corresponding to the first
counterweight pulley 10 and whose rotor axis is oriented horizontally. Reference numeral
111 designates a second top pulley which is rotatively mounted on the roof of the
shaft 1 in parallel with the first top pulley 11 and at a position corresponding to
the sheave 25. Further, the rotor axis of the second top pulley 111 is oriented horizontally.
Reference numeral 112 designates a third top pulley which is rotatively mounted on
the roof of the shaft 1 and whose rotor axis is oriented horizontally. One circumferential
edge of the third top pulley 112 is directly opposite one circumferential edge of
the second counterweight pulley 101, and the other circumferential edge of the third
top pulley 112 is directly opposite one circumferential edge of the sheave 25.
[0042] Reference numeral 12 designates a main cable of first type constituting one of a
plurality of main cables. One end of the main cable 12 is connected to the upper end
of the shaft 1 by means of the anchor 13, and the other end of the same is connected
to the upper end of the shaft 1 by means of the anchor 14. The cable 12 is wound around
the first counterweight pulley 10, the first top pulley 11, the second top pulley
111, and the sheave 25, in the sequence given.
[0043] Reference numeral 121 designates a main cable of second type constituting one of
the plurality of main cables. One end of the main cable 121 is connected to the upper
end of the shaft 1 by means of the anchor 131, and the other end of the same is connected
to the upper end of the shaft 1 by means of the anchor 14. The cable 121 is wound
around the second counterweight pulley 101, the third top pulley 112, and the sheave
25, in the sequence given.
[0044] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the seventh embodiment shown in FIGS. 12 through 14
yields the same working-effect as that yielded in the embodiment shown in FIGS 1 through
4.
[0045] In the seventh embodiment shown in FIGS. 12 through 14, the indentation 37 is formed
in one side of the counterweight 9. When viewed in the horizontal plane of projection,
the hoisting machine 6 fits into the indentation 37. The transverse dimension of the
shaft 1 can be reduced accordingly, and as a result, cost incurred for constructing
the shaft 1 and installing the elevator system within the shaft 1 can be reduced.
Eighth Embodiment
[0046] FIGS. 15 and 16 show an elevator system according to an eighth embodiment of the
present invention. FIG. 15 is a conceptual transverse plan view showing an elevator
system; and FIG. 16 is a transverse plan view showing a section of the elevator system
shown in FIG. 15. The remaining portions of the elevator system of the present embodiment
other than those portions illustrated in FIGS. 15 and 16 are constructed in the same
manner as shown in FIGS. 1 through 4 and FIGS. 12 through 14.
[0047] In the drawings, those reference numerals which are the same as those provided in
FIGS. 1 through 4 and FIGS. 12 through 14 designate corresponding elements. Reference
numeral 9 designates a counterweight which is interposed between the sidewall 30 of
the car 2 and the interior sidewall of the shaft 1. When viewed in the horizontal
plane of projection, an indentation 37 is formed in one side of the counterweight
9 for permitting the hoisting machine 6 provided on the exterior side surface of the
sidewall 30 of the car 2 to pass through. The indentation 37 may be called a hollow
portion, sunken portion, depression or other way.
[0048] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the eighth embodiment shown in FIGS. 15 and 16 yields
the same working-effect as that yielded in the embodiment shown in FIGS 1 through
4.
[0049] In the eighth embodiment shown in FIGS. 15 and 16, the indentation 37 is formed in
one side of the counterweight 9. When viewed within the horizontal plane of projection,
the hoisting machine 6 fits into the indentation 37. Accordingly, the transverse dimension
of the shaft 1 can be reduced, and as a result, cost incurred for constructing the
shaft 1 and installing the elevator system within the shaft 1 can be reduced.
Ninth Embodiment
[0050] FIGS. 17 and 18 show an elevator system according to a ninth embodiment of the present
invention. FIG. 17 is a conceptual transverse plan view showing an elevator system;
and FIG. 18 is a longitudinal cross-sectional view conceptually showing a suspended
state of the main cable of the elevator system shown in FIG. 17. The remaining portions
of the elevator system of the present embodiment other than those portions illustrated
in FIGS. 17 and 18 are constructed in the same manner as shown in FIGS. 1 through
5.
[0051] In the drawings, those reference numerals which are the same as those provided in
FIGS. 1 through 5 designate corresponding elements. Reference numeral 38 designates
an elevator control panel for controlling the hoisting machine 6 or a like component
which is disposed on the exterior side surface of the sidewall 30 of the car 2 so
as to protrude outwardly and is placed at a higher position with reference to the
hoisting machine 6. Reference numeral 39 designates a console panel for use with the
car 2 which is provided on the exterior side surface of the sidewall 30 of the car
2 so as to protrude outwardly and is placed at a lower position with reference to
the hoisting machine 6.
[0052] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the eighth embodiment shown in FIGS. 17 and 18 yields
the same working-effect as that yielded in the embodiment shown in FIGS 1 through
4.
[0053] In the ninth embodiment shown in FIGS. 17 and 18, the control panel 38 is disposed
at a position higher than the hoisting machine 6 provided on the exterior side surface
of the sidewall 30 of the car 2 so as to overlap the hoisting machine 6, as viewed
within the horizontal plane of projection. Further, the console panel 39 is disposed
on the exterior side surface of the sidewall 30 of the car 2 at a position lower than
the hoisting machine 6 so as to overlap the hoisting machine 6, as viewed within the
horizontal plane of projection. Consequently, the area of the hoisting machine 1 within
the horizontal plane with respect to the transverse direction can be effectively used.
Accordingly, the transverse dimension of the shaft 1 can be reduced, as a result of
which, cost incurred for constructing the shaft 1 and installing the elevator system
within the shaft 1 can be reduced.
Tenth Embodiment
[0054] FIGS. 19 and 20 show an elevator system according to a tenth embodiment of the present
invention. FIG. 19 is a conceptual transverse plan view showing an elevator system,
and FIG. 20 is a longitudinal cross-sectional view conceptually showing a suspended
state of the main cable of the elevator system shown in FIG. 19. The remaining portions
of the elevator system of the present embodiment other than those portions illustrated
in FIGS. 19 and 20 are constructed in the same manner as shown in FIGS. 1 through
4.
[0055] In the drawings, those reference numerals which are the same as those provided in
FIGS. 1 through 5 designate corresponding elements. Reference numeral 40 designates
a first upper pulley which is rotatively mounted on the roof or the upper exterior
surface of the car 2 close to its edge at a position above the hoisting machine 6,
and is disposed so as to correspond to the sheave 25. One circumferential edge of
the first upper pulley 40 is directly opposite one circumferential edge of the sheave
25. Reference numeral 41 designates a second upper pulley which is rotatively mounted
on the roof or the upper exterior surface of the car 2, and is provided close to the
other edge of the roof opposite to the first upper pulley 40. Further, the second
upper pulley 41 is located at a position close to the entrance door 15.
[0056] Reference numeral 34 designates a position (hereinafter referred to as a "rear-end
suspension position") where the rear portion of the car 2 is suspended by the main
cable 12 extending between the sheave 25 and the top pulley 11. Reference numeral
12 designates a main cable. One end of the main cable 12 is attached to the upper
end of the shaft 1 by means of the anchor 13, and the other end of the main cable
12 is attached to the upper end of the shaft 1 at a position corresponding to the
second upper pulley 41_by means of another anchor 14. The main cable 12 is wound around
the counterweight pulley 10, the top pulley 11, the rear-end suspension position 34
on the sheave 25, the first upper pulley 40, and the second upper pulley 41, in the
sequence given.
[0057] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, even the elevator system of the tenth embodiment shown in FIGS. 19 and 20
yields the same working-effect as that yielded in the embodiment shown in FIGS. 1
through 4.
[0058] In the tenth embodiment shown in FIGS. 19 and 20, the car 2 is suspended by the main
cable 12 by way of the first upper pulley 40 and the second upper pulley 41. The anchor
14 suspends the front side of the car 2, and the rear portion of the car 2 is suspended
by the main cable 12 at the rear-end suspension position 34. More specifically, the
car 2 is suspended by the main cable 12 at the rear-end suspension position 34 formed
on the sheave 25, as well as at the position on the upper surface of the car 2 which
is spaced apart from the rear-end suspension position 34 in a diagonal direction.
As a result, the portion of the car 2 close to its center of gravity is suspended,
thereby diminishing an offset load exerted on the car 2 and an offset load exerted
on a rail for guiding the car 2. Consequently, the structure of the elevator system
can be simplified, and cost required for constructing the elevator system can be reduced.
[0059] Since the first upper pulley 40 and the second upper pulley 41 are mounted on the
roof of the car 2, the pit of the shaft 1 can be made shallow. Accordingly, cost incurred
for constructing the shaft 1 and installing the elevator system in the shaft 1 can
be reduced.
Eleventh Embodiment
[0060] FIG. 21 is a conceptual transverse plan view showing an elevator system according
to an eleventh embodiment of the present invention. The remaining portions of the
elevator system of the present embodiment other than those portions illustrated in
FIG. 21 are constructed in the same manner as shown in FIGS. 1 through 4 and FIGS.
19 and 20. In FIG. 21, those reference numerals which are the same as those provided
in FIGS. 1 through 4 and FIGS. 19 and 20 designate corresponding elements. Reference
numeral 9 designates a counterweight which is provided within the shaft 1 and is disposed
so as to correspond to the sidewall 30 adjacent to the entrance door 15. Reference
numeral 6 designates a hoisting machine disposed on the car 2; more specifically,
on the exterior side surface of the sidewall 30.
[0061] In the elevator system of the foregoing configuration, the hoisting machine 6 is
disposed on the exterior side surface of the car 2, and the maintenance means 19 is
provided on the wall surface of the car 2. Accordingly, although not described in
detail, the elevator system of the eleventh embodiment shown in FIG. 21 yields the
same working-effect as that yielded in the first through fourth embodiments.
[0062] In the eleventh embodiment shown in FIG. 21, the car 2 is suspended by the main cable
12 by way of the first upper pulley 40 and the second upper pulley 41. The anchor
14 suspends the front side of the car 2, and the rear portion of the car 2 is suspended
by the main cable 12 at the rear-end suspension position 34. More specifically, the
car 2 is suspended by the main cable 12 at the rear-end suspension position 34 formed
on the sheave 25, as well as at the position on the upper surface of the car 2 which
is spaced apart from the rear-end suspension position 34 in a diagonal direction.
As a result, the portion of the car 2 close to its center of gravity is suspended,
thereby diminishing an offset load exerted on the car 2 and an offset load exerted
on a rail for guiding the car 2. Consequently, the structure of the elevator system
can be simplified, and cost required for constructing the elevator system can be reduced.
[0063] Since the first upper pulley 40 and the second upper pulley 41 are mounted on the
roof of the car 2, the pit of the shaft 1 can be made shallow. Accordingly, cost incurred
for constructing the shaft 1 and installing the elevator system in the shaft 1 can
be reduced.
[0064] The features and the effects of the present invention as described above may be summarized
as follows.
[0065] According to one aspect of the present invention, in an elevator system, a car travels
vertically along a predetermined path within a shaft. A counterweight which is moved
vertically along another predetermined path within the shaft. A hoisting machine is
constituted to assume a shallow depth dimension, and is provided on the exterior side
surface of the car. A top pulley is rotatively mounted on the upper end of the shaft,
and whose rotor axis is oriented horizontally. A main cable is connected to the upper
end of the shaft at both ends, and is wound around a pulley mounted on the counterweight,
the top pulley, and the hoisting machine, in this sequence. A sheave constitutes the
principal section of the hoisting machine, and has the main cable wound therearound,
and whose rotor axis is oriented horizontally. Further, maintenance means including
an access port is provided on the side surface of the car, and is opened so as to
correspond to a portion of the hoisting machine to be subjected to maintenance.
[0066] Therefore, the hoisting machine is disposed on the exterior side surface of the car,
and the maintenance means is provided on the wall of the car. In the car, a service
engineer opens the door of the maintenance means and conducts an inspection of and
performs maintenance on the hoisting machine by way of an access port. Thus, the service
engineer does not need to stoop to inspect the hoisting machine and can perform operation
while in a natural posture. Further, the service engineer is not required to pay special
attention so as to avoid accidentally dropping a tool or a like instrument into the
shaft, thereby improving the efficiency of maintenance. Further, since the hoisting
machine is disposed on the exterior side surface of the car, there can be prevented
damage to the hoisting machine, which would otherwise be caused when the lower portion
of the shaft is flooded.
[0067] In another aspect of the present invention, in the elevator system, a deflector wheel
is rotatively provided on the same exterior side surface of the car where the hoisting
machine is provided. A first lower pulley is rotatively mounted on the lower surface
of the car, and is placed at a position corresponding to the hoisting machine. A second
lower pulley which is rotatively mounted on the lower surface of the car, and is placed
close to the edge of the car opposite the first lower pulley. Further, the main cable
is at one end connected to the upper end of the shaft, and the other end is connected
to the upper end of the shaft at a position corresponding to the second lower pulley,
as viewed from above. The main cable is wound around the pulley of the counterweight,
the top pulley, the deflector wheel, the hoisting machine where a suspension position
is formed, the first lower pulley, and the second lower pulley, in this sequence.
[0068] Therefore, the hoisting machine is disposed on the exterior side surface of the car,
and the maintenance means is provided on the wall of the car. In the car, a service
engineer opens the door of the maintenance means and conducts an inspection of and
performs maintenance on the hoisting machine by way of an access port. Thus, the service
engineer does not need to stoop to inspect the hoisting machine and can perform operation
while in a natural posture. Further, the service engineer is not required to pay special
attention so as to avoid accidentally dropping a tool or a like instrument into the
shaft, thereby improving the efficiency of maintenance. Further, since the hoisting
machine is disposed on the exterior side surface of the car, there can be prevented
damage to the hoisting machine, which would otherwise be caused when the lower portion
of the shaft is flooded.
[0069] Further, the car is suspended by the main cable, by way of the first and second lower
pulley, at a suspension position formed on the deflector wheel, as well as at a position
on the lower surface of the car spaced apart from the suspension position in a diagonal
direction. As a result, the portion of the car close to its center of gravity is suspended,
thereby diminishing an offset load exerted on the car and an offset load exerted on
a rail for guiding the car. Consequently, the structure of the elevator system can
be simplified, and cost required for constructing the elevator system can be required.
[0070] In another aspect of the present invention, in the elevator system, a deflector wheel
is rotatively provided on the same exterior side surface of the car where the hoisting
machine is provided. A first side pulley is rotatively provided on the exterior side
surface of the car, and is placed at a position corresponding to the hoisting machine.
A second side pulley is rotatively provided on the exterior side surface of the car,
and is placed at a position spaced apart from the first side pulley. Further, the
main cable is connected at one end to the upper end of the shaft, and the other end
is connected to the upper end of the shaft at a position corresponding to the second
side pulley, as viewed from above. The main cable is wound around the pulley of the
counterweight, the top pulley, the hoisting machine where a suspension position is
formed, the deflector wheel, the first pulley, and the second side pulley, in this
sequence.
[0071] Therefore, the hoisting machine is disposed on the exterior side surface of the car,
and the maintenance means is provided on the wall of the car. In the car, a service
engineer opens the door of the maintenance means and conducts an inspection of and
performs maintenance on the hoisting machine by way of an access port. Thus, the service
engineer does not need to stoop to inspect the hoisting machine and can perform operation
while in a natural posture. Further, the service engineer is not required to pay special
attention so as to prevent avoid accidentally dropping a tool or a like instrument
into the shaft, thereby improving the efficiency of maintenance. Further, since the
hoisting machine is disposed on the exterior side surface of the car, there can be
prevented damage to the hoisting machine, which would otherwise be caused when the
lower portion of the shaft is flooded.
[0072] Further, the car is suspended by the main cable, by way of the first and second side
pulleys, at a suspension position formed on the deflector wheel, as well as at a position
on the lower surface of the car spaced apart from the suspension position in a diagonal
direction. As a result, the portion of the car close to its center of gravity is suspended,
thereby diminishing an offset load exerted on the car and an offset load exerted on
a rail for guiding the car. Consequently, the structure of the elevator system can
be simplified, and cost required for constructing the elevator system can be decreased.
[0073] Further, the first and second side pulleys are provided on the side surface of the
car, and hence an upper margin space originating from the highest stopping position
of the car within the shaft or a lower margin space originating from the lowest stopping
position of the car can be diminished, thus shortening the entire length of the shaft.
Accordingly, cost incurred for constructing the shaft and installing the elevator
system in the shaft can be reduced.
[0074] In another aspect of the present invention, in the elevator system, a first upper
pulley is rotatively provided on the upper surface of the car, and is placed at a
position corresponding to the hoisting machine. A second upper pulley is rotatively
provided on the upper surface of the car, and is placed close to the edge of the upper
surface of the car opposite the first upper pulley. Further, the main cable whose
is connected at one end to the upper end of the shaft, and the other end is connected
to the upper end of the shaft and is placed at a position corresponding to the second
upper pulley. The main cable is wound around the pulley of the counterweight, the
top pulley, the hoisting machine where a suspension position is formed, the first
upper pulley, and the second upper pulley, in this sequence.
[0075] Therefore, the hoisting machine is disposed on the exterior side surface of the car,
and the maintenance means is provided on the wall of the car. In the car, a service
engineer opens the door of the maintenance means and conducts an inspection of and
performs maintenance on the hoisting machine by way of an access port. Thus, the service
engineer does not need to stoop to inspect the hoisting machine and can perform operation
while in a natural posture. Further, the service engineer is not required to pay special
attention so as to avoid accidentally dropping a tool or a like instrument into the
shaft, thereby improving the efficiency of maintenance. Further, since the hoisting
machine is disposed on the exterior side surface of the car, there can be prevented
damage to the hoisting machine, which would otherwise be caused when the lower portion
of the shaft is flooded.
[0076] Further, the car is suspended by the main cable, by way of the first and second upper
pulleys, at a suspension position formed on the deflector wheel, as well as at a position
on the upper surface of the car spaced apart from the suspension position in a diagonal
direction. As a result, the portion of the car close to its center of gravity is suspended,
thereby diminishing an offset load exerted on the car and an offset load exerted on
a rail for guiding the car. Consequently, the structure of the elevator system can
be simplified, and cost required for constructing the elevator system can be decreased.
[0077] In another aspect of the present invention, in the elevator system, an indentation
is formed in the surface of the counterweight facing the hoisting machine such that
the hoisting machine fits into the indentation, as viewed in the horizontal plane
of projection.
[0078] Therefore, when viewed within the horizontal plane of projection, the hoisting machine
fits into the indentation. Accordingly, the transverse dimension of the shaft can
be reduced, and as a result, cost incurred for constructing the shaft and installing
the elevator system within the shaft can be reduced.
[0079] In another aspect of the present invention, in the elevator system, an elevator control
panel or a console panel for use with the car is provided so as to protrude outwardly
on the same wall of the car where the hoisting machine is provided, and is placed
at a position spaced apart from the hoisting machine in either side to the vertical
direction.
[0080] Therefore, when viewed within the horizontal plane of projection, the hoisting machine,
the control panel, and the console panel are arranged so as to overlap one another
in the vertical direction of the hoisting machine provided on the wall of the car.
Consequently, the area of the hoisting machine within the horizontal plane with respect
to the transverse direction can be effectively used. The transverse dimension of the
shaft can be reduced accordingly, and as a result, cost incurred for constructing
the shaft and installing the elevator system within the shaft can be reduced.
[0081] Obviously many modifications and variations of the present invention are possible
in the light of the above teachings. It is therefore to be understood that within
the scope of the appended claims the invention may by practiced otherwise than as
specifically described.
[0082] The entire disclosure of a Japanese Patent Application No. 11-050864, filed on February
26, 1999 including specification, claims, drawings and summary, on which the Convention
priority of the present application is based, are incorporated herein by reference
in its entirety.