Field of the Invention
[0001] The present invention relates to an elevator system in which a hoisting machine is
to be installed within a hoistway, as well as to a mounting mechanism for mounting
onto guide rails the hoisting machine to be installed in the hoistway.
Background Art
[0002] Fig. 10 is a view showing a conventional elevator system described in Japanese Patent
Application Laid-Open No. 208152/1996.
[0003] As shown in the drawing, reference numeral 1 designates a hoistway; 2 designates
a car which is hoisted and lowered within the hoistway; 3 designates car guide rails
provided on either side of the car 2 for guiding ascending and descending actions
of the car 2; 4 designates a counterweight which moves up and down in the direction
opposite the moving direction of the car 2; and 5 designates counterweight guide rails
for guiding ascending and descending actions of the counterweight.
[0004] Reference numeral 6 designates a hoisting machine which acts as a power source for
causing the car 2 and the counterweight to move up and down. The hoisting machine
6 has a traction sheave 61 around which a main cable to be described later is to be
wound; and a drive section 62 including a motor for rotating the traction sheave.
[0005] Reference numeral 8 designates a counterweight pulley fastened to an upper portion
of the counterweight 4; and 9 designates an undercar pulley provided on a lower portion
of the car 2. Two undercar pulleys 9 are provided on the lower portion of the car
2.
[0006] Reference numeral 10 designates a main cable passed around the counterweight pulley
8, the traction sheave 61, and the undercar pulleys 9. The respective ends of the
main cable are anchored to the ceiling of the hoistway or a beam provided in an elevated
position within the hoistway.
[0007] Reference numeral 20 designates a beam affixed to the tops of the counterweight guide
rails 5, and the hoisting machine 6 is mounted on the beam 20.
[0008] Reference numeral 21 designates a reinforcement element for clamping the hoisting
machine 6 on a wall of the hoistway 1. This reinforcement element 21 absorbs horizontal
force but absorbs substantially no vertical supporting force.
[0009] The conventional elevator system is constructed in the manner mentioned previously.
The car 2 and the counterweight 4 move up and down by way of the main cable 10 as
a result of rotation of the traction sheave 61 of the hoisting machine 6.
[0010] In such a conventional elevator system, the hoisting machine 6 is mounted on the
beam 20 in the manner as shown in Fig. 11. At this time, in order to prevent the main
cable 10 from coming into contact with the guide rails 5, the traction sheave 61 is
offset from a plane in which two guide rails 5 are provided, when viewed from the
side. Therefore, because of the force F exerted on the traction sheave 61 by the main
cable 10, a very large moment acts on the hoisting machine 6. The moment imposes bending
force on the counterweight guide rails 5. Therefore, there arises a problem of a necessity
for increasing the size of rails for enhancing the strength thereof.
[0011] Moreover, in order to prevent horizontal deflection of the hoisting machine 6, which
would otherwise be caused by the force F, there arises a necessity for a reinforcement
element for fastening the hoisting machine 6 to the wall of the hoistway 1.
Diclosure of the Invention
[0012] The present invention has been conceived to solve such a problem, and a first object
of the invention is to reduce bending force which is caused to arise in guide rails
by force acting on a traction sheave and to reduce the size of the guide rails. A
second object of the invention is to prevent horizontal deflection of a hoisting machine
without involvement of fastening of the hoisting machine to a wall of a hoistway 1.
[0013] A mechanism for mounting a hoisting machine according to the present invention comprises
a first guide rail and a second guide rail for guiding vertical movement of a car
or that of a counterweight; a hoisting machine having a traction sheave around which
a main cable is to be wound and a drive section for rotationally driving the traction
sheave; a mount member on which the hoisting machine is secured; a first bracing member
which is provided on the mount member, retains the mount member in such a manner that
the mount member is slidable in a longitudinal direction of the first guide rail,
and prevents horizontal runout of the mount member; a second bracing member which
is provided on the mount member, retains the mount member in such a manner that the
mount member is slidable in a longitudinal direction of the second guide rail, and
prevents horizontal runout of the mount member; and support members which are provided
on the first and second guide rails and support vertical load of the mount member
and that of the hoisting machine.
[0014] The mechanism for mounting a hoisting machine further comprises a third bracing member
which is provided on a part of the mount member at a lower side of the first bracing
member, retains the mount member in such a manner that the mount member is slidable
in the longitudinal direction of the first guide rail, and prevents horizontal runout
of the mount member; and a fourth bracing member which is provided on a part of the
mount member at a lower side of the second bracing member, retains the mount member
in such a manner that the mount member is slidable in the longitudinal direction of
the second guide rail, and prevents horizontal runout of the mount member.
[0015] The mechanism for mounting a hoisting machine further comprises resilient members
provided between the mount member and the support member.
[0016] Further, the mechanism for mounting a hoisting machine comprises a beam which is
affixed to the support member and to which one end of the main cable is to be affixed.
[0017] The mechanism for mounting a hoisting machine further comprises a first stopper which
is provided so as to project from the mount member toward the first guide rail and
prevents horizontal runout of the mount member upon coming into contact with the first
guide rail; and a second stopper which is provided so as to project from the mount
member toward the second guide rail and prevents horizontal runout of the mount member
upon coming into contact with the second guide rail.
[0018] The mechanism for mounting a hoisting machine further comprises a joint member which
is provided on an upper end of the first guide rail and that of a second guide rail
and links together the first and second rails at a position higher than the mount
member.
[0019] An elevator system according to the present invention comprises a car which moves
up and down within a hoistway; a plurality of car guide rails for guiding vertical
movement of the car; a counterweight which moves up and down within the hoistway;
a plurality of counterweight guide rails for guiding vertical'movement of the counterweight;
a main cable for suspending the car and the counterweight; a hoisting machine having
a traction sheave around which the main cable is to be passed and a drive section
for rotationally driving the traction sheave and causing the car and the counterweight
to ascend and descend by way of the main cable by means of rotation of the traction
sheave; a mount member on which the hoisting machine is mounted; a first bracing member
which is mounted on the mount member, retains the mount member in such a manner that
the mount member is slidable in a longitudinal direction of the first guide rail selected
from the plurality of car guide rails and the plurality of counterweight guide rails
and which prevents horizontal runout of the mount member; a second bracing member
which is mounted on the mount member, retains the mount member in such a manner that
the mount member is slidable in a longitudinal direction of a second guide rail differing
from the first guide rail selected from the plurality of car guide rails and the plurality
of counterweight guide rails and which prevents horizontal runout of the mount member;
and a support member which is mounted on the first and second guide rails and supports
a vertical load of the mount member and that of the hoisting machine.
Brief Description of the Drawings
[0020]
Fig. 1 is an overall layout view of an elevator system according to a first embodiment;
Fig. 2 is an enlarged view showing the structure of surroundings of a mounting mechanism
7;
Fig. 3 is a side view of the mounting mechanism 7 when viewed from direction A shown
in Fig. 2;
Fig. 4 is a view showing the construction of a mount frame 74, wherein (a) is a front
view of the mount frame 74; (b) is a side view of the mount frame 74; and (c) is a
bottom view of the mount frame 74;
Fig. 5 is an enlarged view showing the structure of an upper bracing member 746a,
wherein (a) is a front view of the upper bracing member 746a, and (b) is a top view
of the upper bracing member 746a;
Fig. 6 is an enlarged view showing the structure of a lower bracing member 747a, or
a cross-sectional view of the same when viewed from direction B shown in Fig. 2;
Fig. 7 is an enlarged view showing the structure of surroundings of another mounting
mechanism 7;
Fig. 8 is a top view of a guide rail joint section 13;
Fig. 9 is a view showing another structure of the guide rail joint section 13;
Fig. 10 is an overall structural drawing of a conventional elevator system; and
Fig. 11 is a view showing a force F acting on a hoisting machine 6.
Best Modes for Implementing the Invention
[0021] In relation to the invention, embodiments will be described hereinbelow.
First Embodiment
[0022] Fig. 1 is an overall layout view of an elevator system according to an embodiment.
[0023] As shown in Fig. 1, reference numeral 1 designates a hoistway; 2 designates a car
which moves up and down within the hoistway 1; and 3a, 3b designate car guide rails
provided on respective sides of the car 2 for guiding vertical movement of the car
2.
[0024] Reference numeral 4 designates a counterweight which moves up and down within the
hoistway in the direction opposite the moving direction of the car 2. Reference numerals
5a, 5b designate counterweight guide rails provided on respective sides of the counterweight
4 for guiding vertical movement of the counterweight 4.
[0025] Reference numeral 6 designates a hoisting machine, which serves as a power source
for causing the car 2, and the counterweight 4 to ascend and descend. The hoisting
machine 6 has a traction sheave 61 around which a main cable to be described later
is to be wound; and a drive section 62 including a motor for rotating the traction
sheave 61.
[0026] Reference numeral 7 designates a mounting mechanism for mounting the hoisting machine
6 between the guide rails 5a, 5b. The present embodiment is characterized by the mounting
mechanism 7, and the mounting mechanism will be described in detail later.
[0027] Reference numeral 8 designates a counterweight pulley attached to an upper portion
of the counterweight 4.
[0028] Reference numeral 9 designates an undercar pulley attached to a lower portion of
the car 2 . Two undercar pul leys 9 are provided on the lower portion of the car 2.
[0029] Reference numeral 10 designates a main cable passed around the counterweight pulley
8, the traction sheave 61, and the undercar pulleys 9. One end of the main cable 10
is anchored to a main cable attachment section 11 provided at the upper end of the
guide rail 3a. The other endof themain cable 10 is anchored to a main cable attachment
section 12 interposed between the guide rails 5a, 5b.
[0030] Since the counterweight pulley 8 is disposed at a position offset from a plane in
which the guide rails 5a, 5b are placed, when viewed from the front, the main cable
10 can be routed from the traction sheave 61 to the counterweight 8 and anchored to
the main cable attachment section 12.
[0031] In the elevator system, the car 2 and the counterweight 4 are caused to ascend or
descend by way of the main cable 10 as a result of rotation of the traction sheave
61 of the hoisting machine 6.
[0032] Next, the structure of the mounting mechanism 7 will be described in detail.
[0033] Fig. 2 is an enlarged view showing the structure of the mounting mechanism 7, and
Fig. 3 is a side view of the structure shown in Fig. 2. The structure of the mounting
mechanism will now be described by reference to these drawings.
[0034] The mounting mechanism 7 comprises support tables 71a, 71b; a cable anchor beam 72;
resilient members 73a, 73b; and a mount frame 74 serving as a mount member.
[0035] The support tables 71a, 71b are attached to the guide rails 5a, 5b, respectively.
One end of the cable anchor beam 72 is fixed to the support table 71a, and the other
end of the same is fixed to the support table 71b. The main cable mount section 12
is provided on the cable anchor beam 72.
[0036] The resilient members 73a, 73b are attached onto the cable anchor beam 72 and formed
from elastic material such as rubber. The mount frame 74 of the hoisting machine is
set on the resilient members 73a, 73b. The hoisting machine 6 is mounted to the mount
frame 74, and the mount frame 74 can be moved minutely in the longitudinal direction
(i.e., the vertical direction) of the guide rails 5a, 5b.
[0037] As shown in Fig. 3, the hoisting machine 6 is mounted on the mount frame 74. In order
to prevent the main cable 10 from coming into contact with the guide rails 5a, 5b
and the counterweight 4, as shown in Fig. 3 the traction sheave 61 (designated by
dotted lines) is placed at a position offset from the plane in which the guide rails
5a, 5b are present.
[0038] As shown in Fig. 4, the mount frame 74 is constituted of lateral members 742, 743
and longitudinal members 741a, 741b. An anchor block 744a is attached to the longitudinal
member 741a, and an anchor block 744b is attached to the longitudinal member 741b.
The hoisting machine 6 is secured to the lateral member 742 and the anchor blocks
744a, 744b.
[0039] A lower stopper 745a is attached to the lower end of the longitudinal member 741a,
and a lower stopper 745b is attached to the lower end of the longitudinal member 741b.
As shown in Fig. 2, a lower end face of the longitudinal member 741a remains in contact
with the resilient member 73a, and a lower end face of the longitudinal member 741b
remains in contact with the resilient member 73b.
[0040] Further, as shown in Fig. 2, upper bracing members 746a, 746b are attached to respective
sides of the lateral member 742. Further, a lower bracing member 747a is attached
to the longitudinal member 741a, and a lower bracing member 747b is attached to the
longitudinal member 741b.
[0041] Figs. 5 and 6 are enlarged views of the upper bracing member 746a and the lower bracing
member 747a.
[0042] As shown in Figs. 5 and 6, the upper bracing member 746a and the lower bracing member
747a catch the guide rail 5a by way of the resilient members. The upper bracing member
746b and the lower bracing member 747b are identical in construction with the upper
bracing member 746a and the lower bracing member 747a and catch the guide rail 5b
by way of the resilient members. By means of such a construction, minute horizontal
deflections of the hoisting machine 6 can be prevented. Moreover, by means of the
foregoing construction, the mount frame 74 is guided by. the guide rails 5a, 5b and
can move minutely in the downward direction. Hence, the vertical force exerted on
the hoisting machine 6 is supported by the support tables 71a, 71b.
[0043] An upper stopper 748a is provided on one side of the lateral member 742 so as to
project toward the guide rail 5a, and an upper stopper 748b is provided on the other
side of the lateral member 742 so as to project toward the guide rail 5b (here, the
portions of the upper bracing members 746a, 746b attached to the lateral member 742
may work as the upper stoppers). The upper stoppers 748a, 748b prevent horizontal
deflections which cannot be inhibited by the bracing members, in conjunction with
the lower stoppers 745a, 745b. Even when large deflections arise as a result of moment
having acted on the hoisting machine 6, horizontal deflections of the mount frame
74 can be prevented by contact existing between the upper stopper 748a, the lower
stopper 745a, and the guide rail 5a and contact existing between the upper stopper
748b, the lower stopper 745b, and the guide rail 5b.
[0044] By means of such a construction, even when the main cable 10 has exerted downward
force F on the hoisting machine, the moment due to the force F can be supported by
the upper stoppers 748a, 748b and the lower stoppers 745a, 745b in a distributed manner.
On the other hand, normal load of the mount frame 74 and that of the hoisting machine
6 acts on the support tables 71a, 71b, and the loads are supported.
[0045] As a result, moment due to the reaction force acting on the guide rails 5a, 5b can
be reduced, thereby allowing downsizing of the guide rails.
[0046] Since the resilient members 73a, 73b are sandwichedbetween the mount frame 74 and
the cable anchor beam 72, transmission of vibrations of the hoisting machine to the
guide rails 5a, 5b can be inhibited. There may be a case where minute horizontal runout
arises in the mount frame 74 for reasons of deflections of the resilient members 73a,
73b. Such horizontal runout can be prevented by the upper bracing members 746a, 746b
and the lower bracing members 747a, 747b.
[0047] According to the mounting structure of the hoisting machine, the hoisting machine
6 is provided between the guide rails 5a, 5b. The space defined between the guide
rails 5a, 5b has hitherto been taken as a dead space. Utilization of this space leads
to effective utilization of a space in the hoistway.
[0048] The cable anchor beam 72 is secured on the support tables 71a, 71b. Hence, the positional
relationship between the hoisting machine 6 and the cable anchor beam 72 does not
require adjustment.
[0049] In the case of the conventional example, a beam is provided on the guide rails 5a,
5b, and the hoisting machine is situated on the beam, thus requiring a heightwise
dimension. In contrast, the present embodiment obviates a space corresponding to the
dimension.
Second Embodiment
[0050] Fig. 7 is an enlarged view of the mounting mechanism according to a second embodiment.
[0051] This embodiment differs from the first embodiment in that a guide rail joint section
13 is provided at the upper ends of the guide rails 5a, 5b. In other respects, the
embodiment is identical with the previous embodiment, and hence repeated explanations
of the remaining elements and their configuration are omitted.
[0052] The guide rail joint section 13 is constructed as follows:
[0053] The back of the guide rail 5a is brought into contact with and fastened to one side
of the L-shaped member 131a by a rail clip 132a. The back of the guide rail 5b is
brought into contact with and fastened to one side of the L-shaped member 131b by
a rail clip 132b. The other side of the L-shaped member 131a and that of the L-shaped
member 131b are joined together by means of a mounting bracket 133.
[0054] By means of the guide rail joint section 13, separation of the guide rail 5a from
the guide rail 5b can be prevented.
[0055] In the embodiment, the guide rail joint section 13 has the construction as set forth.
However, alternatively, the construction shown in Fig. 9 may be adopted. As shown
in Fig. 9, one end of a joint member 134a and one end of a joint member 134b are fixed
to a projecting section which is a sliding surface of the guide rail 5a. The other
end of the joint member 134a and that of the joint member 134b are fixed to a projecting
section which is a sliding surface of the guide rail 5b. To this end, a through hole
is formed in the upper end portion of the projecting section of the guide rail 5a
as well as in a corresponding portion of the guide rail 5b. Bolts are inserted into
the through holes, thereby fastening together the joint members 134a, 134b.
[0056] In the first and second embodiments as above, the cable anchor beam 72 is provided
on the support tables 71a, 71b. The resilient members 73a, 73b are further provided
on the cable anchor beam 72 . However, it may be the case that the cable anchor beam
72 is not interposed between the support tables 71a, 71b and the resilient members
73a, 73b; in this case, the ends of the main cable 10 must be affixed to the ceiling
of the hoistway or other locations.
[0057] The hoisting machine 6 may be fixed on the mount frame 74 by way of the resilient
members.
[0058] In the embodiment, the support tables 71a, 71b are attached to the guide rails 5a,
5b. A support table may be constructed by use of a beam-like member which is connected
at one end thereof to the guide rail 5a and at the other end thereof to the guide
rail 5b.
[0059] Although the embodiment has described a case where a hoisting machine is mounted
on the counterweight guide rails 5a, 5b, the structure of the invention may be applied
to a case where a hoisting machine is mounted on the car guide rails 3a, 3b.
[0060] The structure for mounting a hoisting machine according to the present invention
yields the following advantages.
[0061] A mechanism for mounting a hoisting machine according to the invention comprises
a first guide rail and a second guide rail for guiding vertical movement of a car
or that of a counterweight; a hoisting machine having a traction sheave around which
a main cable is to be wound and a drive section for rotationally driving the traction
sheave; a mount member on which the hoisting machine is secured; a first bracing member
which is provided on the mount member, retains the mount member in such a manner that
the mount member is slidable in a longitudinal direction of the first guide rail,
and prevents horizontal runout of the mount member; a second bracing member which
is provided on the mount member, retains the mount member in such a manner that the
mount member is slidable in a longitudinal direction of the second guide rail, and
prevents horizontal runout of the mount member; and support members which are provided
on the first and second guide rails and support vertical load of the mount member
and that of the hoisting machine. As a result, a bending force, which arises in the
guide rails from force acting on the traction sheave, can be diminished, thereby enabling
a reduction in the size of the guide rails.
[0062] The mechanism for mounting a hoisting machine further comprises a third bracing member
which is provided on a part of the mount member at a lower side of the first bracing
member, retains the mount member in such a manner that the mount member is slidable
in the longitudinal direction of the first guide rail, and prevents horizontal runout
of the mount member; and a fourth bracing member which is provided on a part of the
mount member at a lower side of the second bracing member, retains the mount member
in such a manner that the mount member is slidable in the longitudinal direction of
the second guide rail, and prevents horizontal runout of the mount member. As a result,
a bending force, which arises in the guide rails from force acting on the hoisting
machine, can be diminished further, thereby enabling a reduction in the size of the
guide rails.
[0063] The mechanism for mounting a hoisting machine further comprises resilient members
provided between the mount member and the support member. By provision of the resilient
members, vibration of the hoisting machine is not transmitted to the guide rails.
[0064] Further, the mechanism for mounting a hoisting machine comprises a beam, which is
affixed to the support member and to which one end of the main cable is to be affixed.
Hence, positional adjustment of the hoisting machine and that of the beam are obviated.
[0065] The mechanism for mounting a hoisting machine further comprises a first stopper which
is provided so as to project from the mount member toward the first guide rail and
prevents horizontal runout of the mount member upon coming into contact with the first
guide rail; and a second stopper which is provided so as to project from the mount
member toward the second guide rail and prevents horizontal runout of the mount member
upon coming into contact with the second guide rail. Even if moment, which cannot
be supported by the bracing members, is produced by the force acting on the traction
sheave, the hoisting machine can be supported.
[0066] The mechanism for mounting a hoisting machine further comprises a joint member which
is provided on an upper end of the first guide rail and that of a second guide rail
and links together the first and second rails at a position higher than the mount
member. As a result, expansion of a space between the first and second guide rails
can be prevented, and stiffness of the guide rail can be improved.
[0067] An elevator system according to the invention comprises a car which moves up and
down within a hoistway; a plurality of car guide rails for guiding vertical movement
of the car; a counterweight which moves up and down within the hoistway; a plurality
of counterweight guide rails for guiding vertical movement of the counterweight; a
main cable for suspending the car and the counterweight; a hoisting machine having
a traction sheave around which the main cable is to be passed and a drive section
for rotationally driving the traction sheave and causing the car and the counterweight
to ascend and descend by way of the main cable by means of rotation of the traction
sheave; a mount member on which the hoisting machine is mounted; a first bracing member
which is mounted on the mount member, retains the mount member in such a manner that
the mount member is slidable in a longitudinal direction of the first guide rail selected
from the plurality of car guide rails and the plurality of counterweight guide rails
and which prevents horizontal runout of the mount member; a second bracing member
which is mounted on the mount member, retains the mount member in such a manner that
the mount member is slidable in a longitudinal direction of a second guide rail differing
from the first guide rail selected from the plurality of car guide rails and the plurality
of counterweight guide rails and which prevents horizontal runout of the mount member;
and a support member which is mounted on the first and second guide rails and supports
a vertical load of the mount member and that of the hoisting machine. As a result,
a bending force, which is produced in the guide rails by force acting on the traction
sheave, can be diminished, thereby enabling a reduction in the size of the guide rails.
Industrial Applicability
[0068] As has been described, the invention is applied to an elevator system in which a
hoisting machine is mounted on guide rails.
1. A mechanism for mounting a hoistingmachine, comprising:
a first guide rail and a second guide rail for guiding vertical movement of a car
or that of a counterweight;
a hoisting machine having a traction sheave around which a main cable is to be wound
and a drive section for rotationally driving the traction sheave;
a mount member on which the hoisting machine is secured;
a first bracing member which is provided on the mount member, retains the mount member
in such a manner that the mount member is slidable in a longitudinal direction of
the first guide rail, and prevents horizontal runout of the mount member;
a second bracing member which is provided on the mount member, retains the mount member
in such a manner that the mount member is slidable in a longitudinal direction of
the second guide rail, and prevents horizontal runout of the mount member; and
support members which are provided on the first and second guide rails and support
vertical load of the mount member and that of the hoisting machine.
2. The mechanism for mounting a hoisting machine according to claim 1, further comprising:
a third bracing member which is provided on a part of the mount member at a lower
side of the first bracing member, retains the mount member in such a manner that the
mount member is slidable in the longitudinal direction of the first guide rail, andprevents
horizontal runout of the mount member; and
a fourth bracing member which is provided on a part of the mount member opposing a
lower side of the second bracing member, retains the mount member in such a manner
that the mount member is slidable in the longitudinal direction of the second guide
rail, and prevents horizontal runout of the mount member.
3. The mechanism for mounting a hoisting machine according to claim 1, further comprising:
resilient members provided between the mount member and the support member.
4. The mechanism for mounting a hoisting machine according to claim 1, further comprising:
a beam which is affixed to the support member and to which one end of the main cable
is to be affixed.
5. The mechanism for mounting a hoisting machine according to claim 1, further comprising:
a first stopper which is provided so as to project from the mount member toward the
first guide rail and prevents horizontal runout of the mount member upon coming into
contact with the first guide rail; and
a second stopper which is provided so as to project from the mount member toward the
second guide rail and prevents horizontal runout of the mount member upon coming into
contact with the second guide rail.
6. The mechanism for mounting a hoisting machine according to claim 1, further comprising:
a joint member which is provided on an upper end of the first guide rail and that
of a second guide rail and links together the first and second rails at a position
higher than the mount member.
7. An elevator system comprising:
a car which moves up and down within a hoistway;
a plurality of car guide rails for guiding vertical movement of the car;
a counterweight which moves up and down within the hoistway;
a plurality of counterweight guide rails for guiding vertical movement of the counterweight;
a main cable for suspending the car and the counterweight;
a hoisting machine having a traction sheave around which the main cable is to be passed
and a drive section for rotationally driving the traction sheave and causing the car
and the counterweight to ascend or descend by way of the main cable by means of rotation
of the traction sheave;
a mount member on which the hoisting machine is mounted;
a first bracing member which is mounted on the mount member, retains the mount member
in such a manner that the mount member is slidable in a longitudinal direction of
the first guide rail selected from the plurality of car guide rails and the plurality
of counterweight guide rails andwhich prevents horizontal runout of the mount member;
a second bracingmember which is mounted on the mount member, retains the mount member
in such a manner that the mount member is slidable in a longitudinal direction of
a second guide rail differing from the first guide rail selected from the plurality
of car guide rails and the plurality of counterweight guide rails and which prevents
horizontal runout of the mount member; and
a support member which is mounted on the first and second guide rails and supports
a vertical load of the mount member and that of the hoisting machine.