1. A hoist installed in a building structure, the hoist comprising: a driving motor; a sheave driven by the driving motor, with which a main rope is lifted and lowered with a car connected at one end and a counterweight connected at another end; and a brake device that breaks a disk rotated integrally with the sheave, wherein the hoist is installed in the building structure while being supported by a hoist support base, and further includes a vibration damping mechanism installed at an end part of the hoist support base to reduce vibration occurring in the hoist, and an overturning prevention mechanism installed together with the vibration damping mechanism at the end part of the hoist support base to prevent overturning and/or movement of the hoist, the vibration damping mechanism includes an upper plate, a lower plate, and an elastic body sandwiched between the upper plate and the lower plate, and the overturning prevention mechanism includes: a stopper plate that connects the upper plate of the vibration damping mechanism to the hoist support base, extends to an opposite side to the vibration damping mechanism side, and has a stopper plate through hole at an 22 extended portion near the vibration damping mechanism; a boss base having a boss base through hole to fix the lower plate of the vibration damping mechanism to the building structure by a mounting bolt, and having a screw hole formed at a position opposed to the stopper plate through hole at the extended portion of the stopper plate; and a stopper bolt that is loosely inserted in the stopper plate through hole at the extended portion of the stopper plate and screwed into the screw hole of the boss base.

2. The hoist as claimed in claim 1, wherein the boss base is fastened together with the lower plate of the vibration damping mechanism by two first and second mounting bolts, the boss base has first and second boss base through holes through which the first and second mounting bolts pass through respectively, the screw hole screwed with the stopper bolt is formed between the first and second boss base through holes through which the first and second mounting bolts pass through, and there is formed a step in which an abutting surface of the boss base abutted with a head of the second mounting bolt on an insertion direction side of a work tool is lower than an abutting surface of the boss base abutted with a lock nut that fixes the stopper bolt. 23

3. The hoist as claimed in claim 2, wherein the stopper plate is placed between the hoist support base and the upper plate of the vibration damping mechanism, a plurality of through holes for mounting bolts are formed on the stopper plate located on the upper plate of the vibration damping mechanism, and the upper plate of the vibration damping mechanism and the stopper plate are fixed to the hoist support base by a third mounting bolt via the plurality of through holes for mounting bolts.

4. The hoist as claimed in claim 2 or 3, wherein the vibration damping mechanism and the overturning prevention mechanism that are located at one end part of the hoist support base installed with the hoist are installed in a chipped portion of the building structure.

5. An elevator apparatus comprising: a car and a counterweight that ascend and descend in a hoistway formed in a building structure; a main rope that suspends the car connected to one end and the counterweight connected to another end; and a hoist that is installed in a machine room in an upper part of the hoistway and drives the main rope, wherein the hoist is the hoist as claimed in claim 1. 24

6. A method for assembling a vibration damping mechanism and an overturning prevention mechanism of a hoist, the hoist comprising: a driving motor; a sheave driven by the driving motor, with which a main rope is lifted and lowered with a car connected at one end and a counterweight connected at another end; and a brake device that brakes a disk rotated integrally with the sheave, the hoist being installed in a building structure while being supported by a hoist support base, the hoist further including: a vibration damping mechanism installed at an end part of the hoist support base to reduce vibration occurring in the hoist; and an overturning prevention mechanism installed together with the vibration damping mechanism at the end part of the hoist support base to prevent overturning and/or movement of the hoist, wherein assembling of the vibration damping mechanism and the overturning prevention mechanism of the hoist comprises: installing the vibration damping mechanism formed by an upper plate, a lower plate, and an elastic body sandwiched between the upper plate and the lower plate, and located under the hoist support base that has been jacked up, on a base plate fixed to the building structure, and installing, on the base plate, a boss base having through holes to fix the lower plate of the vibration damping mechanism to the building structure with two first and 25 second mounting bolts, and having a screw hole formed at a position opposed to a through hole of an extended portion of a stopper plate that connects the upper plate of the vibration damping mechanism to the hoist support base, extends to an opposite side to the vibration damping mechanism side, and has the through hole at the extended portion near the vibration damping mechanism; then, fastening the boss base together with the lower plate of the vibration damping mechanism by the two first and second mounting bolts, next, sandwiching the stopper plate between the upper plate of the vibration damping mechanism and the hoist support base, and fixing the upper plate of the vibration damping mechanism and the stopper plate to the hoist support base by a third mounting bolt via a through hole for a mounting bolt formed on the stopper plate located on the vibration damping mechanism; and subsequently, placing a lock nut to fix a stopper bolt, on the screw hole of the boss base fixed to the base plate and the lower plate of the vibration damping mechanism, passing the stopper bolt through the through hole of the stopper plate to screw the stopper bolt into the lock nut and the screw hole of the boss base, and fastening and fixing the lock nut at last. 26

7. The method for assembling the vibration damping mechanism and the overturning prevention mechanism of the hoist as claimed in claim 6, wherein fixing of the stopper bolt by the lock nut is later than fastening work of the first and second mounting bolts of the boss base fastened together with the lower plate of the vibration damping mechanism.

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a hoist, an
elevator apparatus, and a method for assembling a vibration
damping mechanism and an overturning prevention mechanism
of the hoist, and particularly relates to a hoist, an
elevator apparatus, and a method for assembling a vibration
damping mechanism and an overturning prevention mechanism
of the hoist that are suitable for those including a
vibration damping mechanism that reduces vibration
occurring in a hoist, and an overturning prevention
mechanism that prevents overturning or movement of a hoist.
2. Description of the Related Art
As an elevator apparatus including the abovedescribed
vibration damping mechanism and overturning
prevention mechanism, there is an elevator apparatus
described in JP 2002-362860 A.
This JP 2002-362860 A discloses a vibration damping
mechanism in which, for example, a conductive compressed
coil spring is provided between a hoist support base that
2
supports a hoist, and a machine base that supports the
whole of the hoist support base and hoist. Further, a bolt
(overturning prevention mechanism) is provided penetrating
the hoist support base, a hollow part of the compressed
coil spring, and the machine base. One end side of the
bolt is hooked at either one of the hoist support base or
the machine base, and another end side is inserted slackly
into a through hole of another base.
That is, JP 2002-362860 A describes the vibration
damping mechanism in which a lower surface of the hoist
support base and an upper end part of the compressed coil
spring are in contact with each other while an upper
surface of the machine base and a lower end part of the
compressed coil spring are in contact with each other to
enable the spring to freely expand and contract so as to
reduce vibration of the hoist installed on the hoist
support base, and the bolt as the overturning prevention
mechanism prevents overturning of the hoist installed on
the hoist support base when an earthquake occurs, and
regulates a swing width of lateral swing at a time of an
earthquake or lateral swing due to vibration of the hoist.
SUMMARY OF THE INVENTION
However, the above-described prior art (JP 2002-
362860 A) has the following problems.
3
That is, in order to downsize the overturning
prevention mechanism of the prior art, it is desirable to
install the overturning prevention mechanism at an end part
of the hoist support base, to separate a contact point of
the overturning prevention mechanism and the hoist support
base as much as possible from a position of the center of
gravity of the hoist and the hoist support base at a time
of overturning or moving. By increasing the distance from
the center of gravity of the hoist and the hoist support
base to the contact point of the overturning prevention
mechanism and the hoist support base, the overturning
prevention mechanism can prevent movement or overturning of
the hoist with less force, which allows structures, such as
the bolt, the coil spring, the hoist support base, and the
machine base, to be designed small.
Whereas, installing the overturning prevention
mechanism at or near the end part of the hoist support base
causes limitation of a working area around the hoist
support base, posing a problem that assembly becomes
difficult in the installation work of the hoist support
base, in which a direction of a work tool used for
installation is limited.
For example, in installation work of a large hoist
of an elevator apparatus in a narrow building structure,
the hoist support base may be mounted inside a chipped
4
portion or near a wall of the building structure. In the
installation work of the hoist support base, it is
desirable to enable work with a spanner with high
availability. However, when the work area is limited as in
the above example, an insertion direction of the work tool
for assembly of the overturning prevention mechanism is
limited. Therefore, it has sometimes been required to have
a configuration to be assembled with a work tool that is
inferior to a spanner, or to reconsider the installation
place of the hoist support base so as to secure a more work
area.
The present invention has been made in view of the
above problems, and it is an object of the present
invention to provide a hoist, an elevator apparatus, and a
method for assembling a vibration damping mechanism and an
overturning prevention mechanism of the hoist that can
reduce the number of parts and can provide a small
configuration of the overturning prevention mechanism.
To achieve the above object, a hoist according to
the present invention is installed in a building structure
and includes: a driving motor; a sheave driven by the
driving motor, with which a main rope is lifted and lowered
with a car connected at one end and a counterweight
connected at another end; and a brake device that brakes a
disk rotated integrally with the sheave. The hoist is
5
installed in the building structure while being supported
by a hoist support base, and further includes: a vibration
damping mechanism installed at an end part of the hoist
support base to reduce vibration occurring in the hoist;
and an overturning prevention mechanism installed together
with the vibration damping mechanism at the end part of the
hoist support base to prevent overturning and/or movement
of the hoist. The vibration damping mechanism includes an
upper plate, a lower plate, and an elastic body sandwiched
between the upper plate and the lower plate. The
overturning prevention mechanism includes: a stopper plate
that connects the upper plate of the vibration damping
mechanism to the hoist support base, extends to an opposite
side to the vibration damping mechanism side, and has a
through hole at an extended portion near the vibration
damping mechanism; a boss base having through holes to fix
the lower plate of the vibration damping mechanism to the
building structure by a mounting bolt, and having a screw
hole formed at a position opposed to the through hole at
the extended portion of the stopper plate; and a stopper
bolt that is loosely inserted in the through hole at the
extended portion of the stopper plate and screwed into the
screw hole of the boss base.
Further, to achieve the above object, an elevator
apparatus according to the present invention includes: a
6
car and a counterweight that ascend and descend in a
hoistway formed in a building structure; a main rope that
suspends the car connected to one end and the counterweight
connected to another end; and a hoist that is installed in
a machine room in an upper part of the hoistway and drives
the main rope. In the elevator apparatus, the hoist is a
hoist having the above configuration.
Furthermore, to achieve the above object, in a
method for assembling a vibration damping mechanism and an
overturning prevention mechanism of a hoist according to
the present invention, the hoist includes: a driving motor;
a sheave driven by the driving motor, with which a main
rope is lifted and lowered with a car connected at one end
and a counterweight connected at another end; and a brake
device that breaks a disk rotated integrally with the
sheave. The hoist is installed in a building structure
while being supported by a hoist support base, and further
includes: a vibration damping mechanism installed at an end
part of the hoist support base to reduce vibration
occurring in the hoist; and an overturning prevention
mechanism installed together with the vibration damping
mechanism at the end part of the hoist support base to
prevent overturning and/or movement of the hoist.
Assembling of the vibration damping mechanism and the
overturning prevention mechanism of the hoist includes:
7
installing the vibration damping mechanism, which is formed
by an upper plate, a lower plate, and an elastic body
sandwiched between the upper plate and the lower plate, and
located under the jacked up hoist support base, on a base
plate fixed to the building structure; installing, on the
base plate, a boss base having through holes to fix the
lower plate of the vibration damping mechanism to the
building structure with two first and second mounting
bolts, and having a screw hole formed at a position opposed
to a through hole of an extended portion of a stopper plate
that connects the upper plate of the vibration damping
mechanism to the hoist support base, extends to an opposite
side to the vibration damping mechanism side, and has the
through hole at the extended portion near the vibration
damping mechanism; then, fastening the boss base together
with the lower plate of the vibration damping mechanism by
the two first and second mounting bolts; next, sandwiching
the stopper plate between the upper plate of the vibration
damping mechanism and the hoist support base; fixing the
upper plate of the vibration damping mechanism and the
stopper plate to the hoist support base by a third mounting
bolt via a through hole for a mounting bolt formed on the
stopper plate located on the vibration damping mechanism;
subsequently, placing a lock nut to fix a stopper bolt, on
the screw hole of the boss base fixed to the base plate and
8
the lower plate of the vibration damping mechanism; passing
the stopper bolt through the through hole of the stopper
plate to screw the stopper bolt into the lock nut and the
screw hole of the boss base; and fastening and fixing the
lock nut at last.
According to the present invention, the number of
parts can be reduced and the overturning prevention
mechanism can be made small.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic configuration view showing an
elevator apparatus installed with a hoist according to a
first embodiment of the present invention;
Fig. 2A is a detailed view of a portion A in Fig. 1,
and is a front view showing a configuration of a vibration
damping mechanism and an overturning prevention mechanism
of the hoist;
Fig. 2B is a left side view of Fig. 2A;
Fig. 2C is a plan view of Fig. 2A;
Fig. 3A is a plan view showing a stopper plate of
the overturning prevention mechanism that is adopted in the
hoist according to the first embodiment of the present
invention;
Fig. 3B is a side view of Fig. 3A;
9
Fig. 4A is a plan view showing a boss base of the
overturning prevention mechanism that is adopted in the
hoist according to the first embodiment of the present
invention;
Fig. 4B is a front view of Fig. 4A;
Fig. 5 is a flow chart showing a method (work
procedure) for assembling the vibration damping mechanism
and the overturning prevention mechanism of the hoist
according to the present invention;
Fig. 6A is view of a hoist 1 according to a second
embodiment of the present invention, showing an enlargement
of a portion B in Fig. 1, and is a front view showing a
state installed in a chipped portion of a building
structure; and
Fig. 6B is a plan view of Fig. 6A.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, a hoist, an elevator apparatus, and a
method for assembling a vibration damping mechanism and an
overturning prevention mechanism of the hoist according to
the present invention will be described with reference to
the illustrated embodiments. In each figure, the same
reference numerals are used for the same components.
First embodiment
10
Fig. 1 shows a schematic configuration of an
elevator apparatus in which a hoist support base 2
installed with a hoist 1 according to a first embodiment of
the present invention is installed in a chipped portion 3A
of a building structure 3.
As shown in the figure, the elevator apparatus of
this embodiment is roughly configured to include: a car 5
and a counterweight 6 that ascend and descend in a hoistway
4 formed in the building structure 3; a main rope 7 that
suspends the car 5 connected to one end and the
counterweight 6 connected to another end; and the hoist 1
installed in a machine room 8 in an upper part of the
hoistway 4 and configured to drive the main rope 7.
Whereas, the hoist 1 includes: a driving motor (not
shown); a sheave (not shown) driven by this driving motor,
with which the main rope 7 is lifted and lowered with the
car 5 connected at one end and the counterweight 6
connected at another end; and two brake devices 10a and 10b
that brake a disk 9 rotated integrally with the sheave.
Then, the hoist 1 configured as described above is
installed on the hoist support base 2, and one end part (a
portion B in Fig. 1) of the hoist support base 2 is placed
in the chipped portion 3A of the building structure 3,
while another part (a portion A in Fig. 1) of the hoist
11
support base 2 is placed on a floor 8A of the machine room
8.
In addition, the hoist 1 is provided with a
vibration damping mechanism that reduces vibration
occurring in the hoist 1, which will be described later,
and an overturning prevention mechanism installed at an end
part of the hoist support base 2 together with the
vibration damping mechanism, to prevent overturning and/or
movement of the hoist 1.
Next, configurations of the above-described
vibration damping mechanism and overturning prevention
mechanism will be described with reference to Figs. 2A, 2B,
and 2C. Figs. 2A, 2B, and 2C are detailed views of the
portion A of Fig. 1.
As shown in Figs. 2A, 2B, and 2C, the vibration
damping mechanism includes an upper plate 11, a lower plate
12, and an elastic body 13 sandwiched between the upper and
lower plates 11 and 12.
Whereas, the overturning prevention mechanism
includes: a stopper plate 14 that connects the upper plate
11 of the vibration damping mechanism to the hoist support
base 2, extends to an opposite side to the vibration
damping mechanism side (the right side in Fig. 2B), and has
a through hole 14a (see Figs. 3A and 3B) at an extended
portion near the vibration damping mechanism; a boss base
12
16 having two through holes 16b and 16c (see Figs. 4A and
4B) to fix the lower plate 12 of the vibration damping
mechanism to the building structure 3 with a first mounting
bolt 15a and a second mounting bolt 15b, and having a screw
hole 16a (see Figs. 4A and 4B) formed at a position opposed
to the through hole 14a of the extended portion of the
stopper plate 14; and a stopper bolt 17 that is loosely
inserted in the through hole 14a of the extended portion of
the stopper plate 14 and screwed into the screw hole 16a of
the boss base 16.
The boss base 16 above is fastened together with the
lower plate 12 of the vibration damping mechanism by the
two first and second mounting bolts 15a and 15b, and the
screw hole 16a screwed with the stopper bolt 17 is formed
between the through holes 16b and 16c through which the
first and second mounting bolts 15a and 15b pass through,
as shown in Figs. 4A and 4B.
As shown in Figs. 4A and 4B, on the boss base 16,
for example, there is formed a step 16f in which an
abutting surface 16e of the boss base 16, which is abutted
with a head of the second mounting bolt 15b on an insertion
direction side of a work tool such as a spanner, is lower
than an abutting surface 16d of the boss base 16, which is
abutted with a lock nut 18 that fixes the stopper bolt 17.
13
Further, the stopper plate 14 is placed between the
hoist support base 2 and the upper plate 11 of the
vibration damping mechanism. On a part of the stopper
plate 14 located on the upper plate 11 of the vibration
damping mechanism, there are formed a plurality of (four in
this embodiment) through holes 14b, 14c, 14d, and 14e for
mounting bolts. Via the plurality of through holes 14b,
14c, 14d, and 14e for mounting bolts, the upper plate 11 of
the vibration damping mechanism and the stopper plate 14
are fixed to the hoist support base 2 by four third
mounting bolts 19a, 19b, 19c, and 19d.
As shown in Figs. 2B and 2C, a base plate 20 is
fixed with one side of the lower plate 12 of the vibration
damping mechanism opposite to the side disposed with the
boss base 16, by first and second mounting bolts 15c and
15d different from the first and second mounting bolts 15a
and 15b described above.
More specifically, the vibration damping mechanism
installed at the end part of the hoist support base 2 is
configured such that the elastic body 13 such as rubber is
fixed by the upper plate 11 and the lower plate 12. The
upper plate 11 is connected to the hoist support base 2 via
the stopper plate 14 of the overturning prevention
mechanism, while the lower plate 12 is connected to the
base plate 20 provided on the building structure 3.
14
In addition, since the vibration damping function of
the elastic body 13 of the vibration damping mechanism
deteriorates due to vibration from the hoist 1 and with
time, the elastic body 13 is connected to the hoist support
base 2 and the base plate 20 by a mounting bolt that can be
fixed by a spanner with high availability, for easy
replacement.
Further, as shown in Figs. 2A and 2B, the stopper
plate 14 is sandwiched between the hoist support base 2 and
the upper plate 11 of the vibration damping mechanism, and
fixed by passing the four third mounting bolts 19a, 19b,
19c, and 19d shown in Figs. 2A and 2B through the four
through holes 14b, 14c, 14d, and 14e for mounting bolts
shown in Figs. 3A and 3B. In the through hole 14a of the
stopper plate 14, the stopper bolt 17 shown in Figs. 2A,
2B, and 2C is loosely inserted.
Further, as shown in Figs. 4A and 4B, on the boss
base 16, there are formed the screw hole 16a to be screwed
with the stopper bolt 17, and through holes 16b and 16c to
be inserted with the first and the second mounting bolts
15a and 15b that fix the lower plate 12 of the vibration
damping mechanism to the base plate 20 by fastening
together with the boss base 16. On the boss base 16, there
is also provided the step 16f so as to make a head of the
second mounting bolt 15b lower than the lock nut 18 to
15
prevent interference with a work tool such as a spanner,
even when the second mounting bolt 15b is fastened prior to
fastening of the lock nut 18 that fixes the stopper bolt
17.
In assembling work of the overturning prevention
mechanism, the fixing of the stopper bolt 17 by the lock
nut 18 is required to be later than fastening work of the
first mounting bolt 15a and the second mounting bolt 15b of
the boss base 16 fastened together with the vibration
damping mechanism. This is because, if the stopper bolt 17
is firstly fixed to the boss base 16 while the first
mounting bolt 15a and the second mounting bolt 15b of the
boss base 16 are fastened at last, the boss base 16 moves
when the first mounting bolt 15a and the second mounting
bolt 15b are fastened, making it difficult to arrange the
stopper bolt 17, which is loosely inserted into the through
hole 14a of the stopper plate 14, at an appropriate
position of the through hole 14a.
Next, with reference to Fig. 5, a method for
assembling (assembling work) of the vibration damping
mechanism and the overturning prevention mechanism of the
hoist according to the present invention will be described.
As shown in Fig. 5, in the method for assembling the
vibration damping mechanism and the overturning prevention
mechanism of the hoist according to the present invention,
16
the hoist support base 2 is jacked up (S1), and the
vibration damping mechanism including the elastic body 13,
the upper plate 11, the lower plate 12 is installed on the
base plate 20 (S2). The boss base 16 is placed on the base
plate 20 (S3).
Thereafter, while the first mounting bolts 15a and
15c and the second mounting bolts 15b and 15d are fastened
to the base plate 20, the first and second mounting bolts
15a and 15b are fastened together with the boss base 16
(S4). The stopper plate 14 is sandwiched between the upper
plate 11 of the vibration damping mechanism and the hoist
support base 2, and then the stopper plate 14, the upper
plate 11, the hoist support base 2 are fixed by using the
through holes 14b, 14c, 14d, and 14e for mounting bolts
(S5).
Subsequently, the lock nut 18 is placed on the screw
hole 16a of the boss base 16 that has been already fixed to
the base plate 20 and the lower plate 12 of the vibration
damping mechanism (S6). The stopper bolt 17 is inserted
through the through hole 14a of the stopper plate 14 and is
screwed into the lock nut 18 and the screw hole 16a of the
boss base 16 below (S7).
Finally, by fastening the lock nut 18 and fixing the
stopper bolt 17 so as not to be loosened (S8), the assembly
17
of the vibration damping mechanism and the overturning
prevention mechanism is completed.
The present embodiment as described above allows the
boss base 16 to be fastened together with the vibration
damping mechanism, and allows the stopper bolt 17 to be
arranged near the hoist support base 2. This reduces
stress occurring in the stopper plate 14 at a time of
overturning or movement, enabling reduction of the number
of parts and a small configuration of the overturning
prevention mechanism.
In addition, since the boss base 16 is provided with
the step 16f, the stopper bolt 17 and the lock nut 18 of
stopper bolt 17 can be screwed and fastened after fastening
of the first and second mounting bolts 15a and 15b, which
are fastened together to the vibration damping mechanism,
without interference with the head of the second mounting
bolt 15b of the boss base 16 even when the hoist support
base 2 is installed in a work space where an insertion
direction of a work tool (e.g., a spanner) is limited.
Therefore, according to the present embodiment, it
is surely possible to reduce the number of parts and to
make the overturning prevention mechanism small, but it is
also possible to provide a hoist and an elevator apparatus
enabling assembly with a work tool such as a spanner with
high availability without enlarging the overturning
18
prevention mechanism, even when the hoist support base 2 is
mounted in a narrow building structure 3, and the working
area for assembly is limited.
Second embodiment
Figs. 6A and 6B are views of a hoist 1 according to
a second embodiment of the present invention, showing an
enlargement of the portion B in Fig. 1, and showing an
example of a case where a hoist support base is installed
in a space where an insertion direction of a work tool is
limited.
In the hoist 1 according to the present embodiment
shown in the figure, a vibration damping mechanism and an
overturning prevention mechanism having the structure
described in the first embodiment, and being located at one
end part of a hoist support base 2 provided with the hoist
1, are installed in a chipped portion 3A of a building
structure 3.
That is, when the hoist support base 2 is installed
in the chipped portion 3A of the building structure 3,
since the end part of the hoist support base 2 is
surrounded by a wall of the building structure 3, an
insertion direction 22 of a work tool 21 such as a spanner
is exclusively limited to a direction provided with a
support frame. Therefore, a boss base 16 is provided with
a step 16f shown in Figs. 4A and 4B to prevent interference
19
of the work tool 21 with a head of the second mounting bolt
15b in fastening work of a stopper bolt 17 and a lock nut
18 after fastening of first and second mounting bolts 15a
and 15b.
According to the present embodiment as described
above, it is surely possible to provide the same effect as
that of the first embodiment, but since the step 16f is
provided on the boss base 16 of the overturning prevention
mechanism, it is also possible to fix the stopper bolt 17
to the boss base 16 at the end of the assembling work, and
arrange the stopper bolt 17 at an optimum place of the
through hole 14a of the stopper plate 14, without
interference of the work tool 21 with the head of the
second mounting bolt 15b of the boss base 16, even when the
insertion direction 22 of the work tool 21 is limited to
the direction provided with the support frame in the
assembling work at the end part of the hoist support base
2.
It is to be noted that, the embodiments described
above have been illustrated in detail to facilitate
description for easy understanding, and are not necessarily
limited to the embodiments that include all the illustrated
configurations. Additionally, a part of a configuration of
an embodiment may be replaced with a configuration of
another embodiment, and a configuration of an embodiment
20
may be added with a configuration of another embodiment.
Moreover, a part of a configuration of each embodiment may
be deleted, replaced, added with another configuration.
Reference Signs List
1 … hoist, 2 … hoist support base, 3 … building structure,
3A … chipped portion of building structure, 4 … hoistway, 5
… car, 6 … counterweight, 7 … main rope, 8 … machine room,
8A … floor of machine room, 9 … disk, 10a,10b … brake
device, 11 … upper plate, 12 … lower plate, 13 … elastic
body, 14 … stopper plate, 14a … stopper plate through hole,
14b,14c,14d,14e … stopper plate through hole for a mounting
bolt, 15a,15c … first mounting bolt, 15b,15d … second
mounting bolt, 16 … boss base, 16a … boss base screw hole,
16b,16c … boss base through hole, 16d … abutting surface of
boss base, 16e … abutting surface abutted with lock nut of
boss base, 16f … step, 17 … stopper bolt, 18 … lock nut,
19a,19b,19c,19d … third mounting bolt, 20 … base plate, 21
… work tool, and 22 … insertion direction of work tool.

Claims
We claim:
1. A hoist installed in a building structure, the
hoist comprising: a driving motor; a sheave driven by the
driving motor, with which a main rope is lifted and lowered
with a car connected at one end and a counterweight
connected at another end; and a brake device that breaks a
disk rotated integrally with the sheave, wherein
the hoist is installed in the building structure
while being supported by a hoist support base, and further
includes a vibration damping mechanism installed at an end
part of the hoist support base to reduce vibration
occurring in the hoist, and an overturning prevention
mechanism installed together with the vibration damping
mechanism at the end part of the hoist support base to
prevent overturning and/or movement of the hoist,
the vibration damping mechanism includes an upper
plate, a lower plate, and an elastic body sandwiched
between the upper plate and the lower plate, and
the overturning prevention mechanism includes: a
stopper plate that connects the upper plate of the
vibration damping mechanism to the hoist support base,
extends to an opposite side to the vibration damping
mechanism side, and has a stopper plate through hole at an
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extended portion near the vibration damping mechanism; a
boss base having a boss base through hole to fix the lower
plate of the vibration damping mechanism to the building
structure by a mounting bolt, and having a screw hole
formed at a position opposed to the stopper plate through
hole at the extended portion of the stopper plate; and a
stopper bolt that is loosely inserted in the stopper plate
through hole at the extended portion of the stopper plate
and screwed into the screw hole of the boss base.
2. The hoist as claimed in claim 1, wherein
the boss base is fastened together with the lower
plate of the vibration damping mechanism by two first and
second mounting bolts, the boss base has first and second
boss base through holes through which the first and second
mounting bolts pass through respectively, the screw hole
screwed with the stopper bolt is formed between the first
and second boss base through holes through which the first
and second mounting bolts pass through, and there is formed
a step in which an abutting surface of the boss base
abutted with a head of the second mounting bolt on an
insertion direction side of a work tool is lower than an
abutting surface of the boss base abutted with a lock nut
that fixes the stopper bolt.
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3. The hoist as claimed in claim 2, wherein
the stopper plate is placed between the hoist
support base and the upper plate of the vibration damping
mechanism, a plurality of through holes for mounting bolts
are formed on the stopper plate located on the upper plate
of the vibration damping mechanism, and the upper plate of
the vibration damping mechanism and the stopper plate are
fixed to the hoist support base by a third mounting bolt
via the plurality of through holes for mounting bolts.
4. The hoist as claimed in claim 2 or 3, wherein
the vibration damping mechanism and the overturning
prevention mechanism that are located at one end part of
the hoist support base installed with the hoist are
installed in a chipped portion of the building structure.
5. An elevator apparatus comprising:
a car and a counterweight that ascend and descend in
a hoistway formed in a building structure; a main rope that
suspends the car connected to one end and the counterweight
connected to another end; and a hoist that is installed in
a machine room in an upper part of the hoistway and drives
the main rope, wherein
the hoist is the hoist as claimed in claim 1.
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6. A method for assembling a vibration damping
mechanism and an overturning prevention mechanism of a
hoist, the hoist comprising: a driving motor; a sheave
driven by the driving motor, with which a main rope is
lifted and lowered with a car connected at one end and a
counterweight connected at another end; and a brake device
that brakes a disk rotated integrally with the sheave, the
hoist being installed in a building structure while being
supported by a hoist support base, the hoist further
including: a vibration damping mechanism installed at an
end part of the hoist support base to reduce vibration
occurring in the hoist; and an overturning prevention
mechanism installed together with the vibration damping
mechanism at the end part of the hoist support base to
prevent overturning and/or movement of the hoist, wherein
assembling of the vibration damping mechanism and the
overturning prevention mechanism of the hoist comprises:
installing the vibration damping mechanism formed by
an upper plate, a lower plate, and an elastic body
sandwiched between the upper plate and the lower plate, and
located under the hoist support base that has been jacked
up, on a base plate fixed to the building structure, and
installing, on the base plate, a boss base having through
holes to fix the lower plate of the vibration damping
mechanism to the building structure with two first and
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second mounting bolts, and having a screw hole formed at a
position opposed to a through hole of an extended portion
of a stopper plate that connects the upper plate of the
vibration damping mechanism to the hoist support base,
extends to an opposite side to the vibration damping
mechanism side, and has the through hole at the extended
portion near the vibration damping mechanism;
then, fastening the boss base together with the
lower plate of the vibration damping mechanism by the two
first and second mounting bolts, next, sandwiching the
stopper plate between the upper plate of the vibration
damping mechanism and the hoist support base, and fixing
the upper plate of the vibration damping mechanism and the
stopper plate to the hoist support base by a third mounting
bolt via a through hole for a mounting bolt formed on the
stopper plate located on the vibration damping mechanism;
and
subsequently, placing a lock nut to fix a stopper
bolt, on the screw hole of the boss base fixed to the base
plate and the lower plate of the vibration damping
mechanism, passing the stopper bolt through the through
hole of the stopper plate to screw the stopper bolt into
the lock nut and the screw hole of the boss base, and
fastening and fixing the lock nut at last.
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7. The method for assembling the vibration damping
mechanism and the overturning prevention mechanism of the
hoist as claimed in claim 6, wherein
fixing of the stopper bolt by the lock nut is later
than fastening work of the first and second mounting bolts
of the boss base fastened together with the lower plate of
the vibration damping mechanism.