JP7180643B2 - Lifting device for elevator hoisting machine brake, method for installing lifting device, and method for replacing hoisting machine brake - Google Patents

Description

The present disclosure relates to a lifting device for an elevator hoisting machine brake, a method of installing the lifting device, and a method of replacing the hoisting machine brake.

Patent Literature 1 discloses a technique related to a heavy object lifting device. In this technique, rails are fixed horizontally on top of a pair of stanchions. A trolley is provided on the rail, and a chain block is provided on the trolley. A heavy object lifted by the chain block is transported horizontally along the rail.

Japanese Patent Application Laid-Open No. 2019-210109

The elevator hoist is equipped with a large hoist brake. Hoist brakes are replaced periodically. Here, it is considered that the hoisting machine brake is replaced by using the lifting device of Patent Document 1 described above. The machine room where the hoist is installed has a limited space available for replacement work. In such a limited space, there is a possibility that a large lifting device such as that disclosed in Patent Document 1 cannot be installed at an optimal position. If the lifting device is installed at a position that is laterally displaced from the installation position of the hoisting machine brake, the removed hoisting machine brake may swing like a pendulum, which is dangerous.

The present disclosure has been made in order to solve the above problems, and a lifting device for an elevator hoisting machine brake that can safely lift and replace the hoisting machine brake of an elevator, and a lifting device. An object of the present invention is to provide an installation method and a replacement method for a hoist brake.

A lifting device for an elevator hoisting machine brake of the present disclosure is a lifting device for lifting a hoisting machine brake mounted on an elevator hoisting machine installed in a machine room. A plate fixed on the base of the hoisting machine of the elevator higher than the floor of the machine room, a first column installed on the plate, and a second column installed on the floor of the machine room and longer than the first column. Two pillars, a rail fixed so as to bridge the top of the first pillar and the top of the second pillar, a trolley installed movably on the rail, a hoist installed on the trolley, At least one of the first strut and the second strut is configured to be able to adjust the strut height so that the rail approaches the horizontal, and the rail passes directly above the mounting position of the hoisting machine brake, A first strut and a second strut are positioned, the first strut and the second strut each including a base fixed to a lower end, and the top of the first strut and the second strut are positioned relative to the base. are configured to be rotatable .

Further, the installation method of the lifting device of the present disclosure is a method of installing the lifting device for lifting the hoisting machine brake of the elevator installed in the machine room, and the lifting device is installed at a position higher than the floor surface of the machine room. The first step is to fix the plate on the base of the hoisting machine of a certain elevator, install the first support on the plate, install the second support that is longer than the first support on the machine room floor, and install the second support on the machine room floor. A second step of fixing the rail so as to horizontally span the top of the first strut and the top of the second strut, a third step of movably installing the trolley on the rail, and installing the hoist on the trolley; wherein the second step is configured to position the first and second struts so that the rail passes directly over the mounting position of the hoist brake , the first and second struts comprising: Each includes a base fixed to the lower end, the tops of the first strut and the second strut are rotatable with respect to the base, and the second step includes the top of the first strut and the second strut. Rotate the top of the column and fix it so that the rail is spanned .

Furthermore, a method for replacing a hoisting machine brake of the present disclosure is a method of replacing a hoisting machine brake of an elevator using a lifting device installed by the method of installing a lifting device of the present disclosure, The hoist is moved directly above the installation position of the old hoisting machine brake attached to the hoist, and the old hoisting machine brake is removed while hanging the old hoisting machine brake by the hoist. and lower the old hoist brake into the work space.

According to the elevator hoisting machine brake lifting device of the present disclosure, the support can be installed on the base that is higher than the floor surface of the machine room. As a result, the rail can be passed directly above the mounting position of the hoisting machine brake, so that the hoisting machine brake can be safely lifted and replaced in a limited space.

It is a figure for demonstrating the outline|summary of the hoisting machine brake of an elevator. It is a figure for demonstrating the structure of the lifting device of the hoisting machine brake as a comparative example. It is a figure for demonstrating arrangement|positioning of the lifting device of the hoisting machine brake as a comparative example. It is a figure for demonstrating the subject of the lifting apparatus of a comparative example. It is a figure for demonstrating the structure of the lifting apparatus of embodiment. It is a figure for demonstrating the structure of the lifting apparatus of embodiment. It is a figure for demonstrating arrangement|positioning of the lifting device of the hoisting machine brake of embodiment. It is a figure for demonstrating the lifting apparatus installation process among the replacement|exchange procedures of a hoisting machine brake. It is a figure for demonstrating the lifting apparatus installation process among the replacement|exchange procedures of a hoisting machine brake. It is a figure for demonstrating the lifting apparatus installation process among the replacement|exchange procedures of a hoisting machine brake. FIG. 7 is a diagram showing a state in which the hoisting machine brake is lowered to the work space in the hoisting machine brake removing process;

Embodiments will be described below with reference to the drawings. In addition, the same code|symbol is attached|subjected to the element which is common in each figure, and the overlapping description is abbreviate|omitted.

Embodiment 1.
1. Overview of Elevator Hoisting Machine Brake FIG. 1 is a diagram for explaining an overview of an elevator hoisting machine brake. A hoisting machine 10 shown in this figure is a large hoisting machine for an elevator. The hoist 10 is installed in the machine room 2 . More specifically, the machine room 2 is provided with a base 4 on which the hoist 10 is installed. The base 4 is composed of, for example, a pair of H steels installed parallel to the floor of the machine room 2 . The hoist 10 is fixed on the base 4, that is, at a position higher than the machine room floor.

The hoist 10 includes a large hoist brake. Two hoist brakes 12, 14 are mounted on the hoist 10 of this figure. The hoist brakes 12, 14 are periodically replaced. However, it is not easy to replace such a large hoist brake. This is because the machine room 2 is generally narrow and cannot secure a sufficient space for the replacement work. For this reason, it is necessary to devise ways to effectively use the limited working space in the hoisting machine brake replacement work.

Replacement work of the hoist brake is performed using a lifting device. The lifting device is for suspending and moving the hoist brake. Hereinafter, the construction of the lifting device of the present embodiment will be described by taking as an example the work of replacing the hoisting machine brake 12 among the hoisting machine brakes 12 and 14 .

2. Lifting device for hoist brake 2-1. Lifting Apparatus of Comparative Example Prior to describing the lifting apparatus of the present embodiment, the configuration of a lifting apparatus of a comparative example will be described. FIG. 2 is a diagram for explaining the configuration of a lifting device for a hoisting machine brake as a comparative example. FIG. 3 is a diagram for explaining the arrangement of a lifting device of a hoisting machine brake as a comparative example. The lifting device 50 of the comparative example includes two struts 52 , rails 54 , trolleys 56 and hoists 58 . The two pillars 52 are for horizontally supporting the rail 54 at a high place. The rail 54 is made of H steel, for example. Both ends of the rail 54 are fixed to the tops of the pillars 52, respectively. A trolley 56 is attached to the rail 54 . The trolley 56 is configured to be movable on the rails 54 . A hoist 58 is attached to the trolley 56 . The hoist 58 is exemplified by a chain block.

As shown in FIGS. 2 and 3 , two governors 6 and 8 are installed in front of the hoist 10 in the machine room 2 . Therefore, in the lifting device 50 of the comparative example, an arrangement along the machine room wall of the machine room 2 is adopted as an arrangement that allows the base portions of the two pillars 52 to be installed on the machine room floor.

In such an arrangement of the lifting device 50 of the comparative example, when replacing the hoisting machine brake 12, the following problems occur. FIG. 4 is a diagram for explaining a problem of the lifting device of the comparative example. In the lifting device 50 of the comparative example, the rail 54 of the lifting device 50 is not positioned directly above the hoisting machine brake 12 to be replaced. Therefore, when the hoist 58 is connected to the eyebolt of the hoisting machine brake 12 and lifted, the hoisting machine brake 12 is swung largely toward the lifting device 50 when the mounting bolt of the hoisting machine brake 12 is removed. There is a danger that it will be damaged. As described above, in the lifting device 50 of the comparative example, since the bases of the two pillars 52 need to be securely grounded on the floor surface of the machine room, the installation location is greatly restricted. In addition, the lifting device 50 of the comparative example requires a safety design in consideration of the shake of the removed hoisting machine brake 12 . This causes, for example, an increase in the size of the apparatus.

2-2. Lifting Apparatus of the Present Embodiment FIGS. 5 and 6 are diagrams for explaining the configuration of the lifting apparatus of the present embodiment. FIG. 7 is a diagram for explaining the arrangement of the lifting device of the hoisting machine brake of the present embodiment. A lifting device 20 of the present embodiment includes a first strut 22 , a second strut 24 , a rail 26 , a trolley 28 , a hoist 30 and a plate member 40 . The first strut 22 has a lower strut height than the second strut 24 . The first strut 22 and the second strut 24 include struts 222 and 242 whose height is adjustable, and bases 224 and 244 fixed to the lower ends of the struts 222 and 242, respectively. . The structure of the struts 222 and 242 is exemplified by pipe supports, for example.

The rail 26 is made of H steel, for example. Both ends of the rail 26 are fixed to the tops of the first support 22 and the second support 24 . By adjusting the column heights of the first column 22 and the second column 24, the rail 26 is horizontally fixed.

A trolley 28 is attached to the rail 26 . A hoist 30 is attached to the trolley 28 . The hoist 30 is exemplified by a chain block.

Between the hoisting machine 10 and the machine room wall of the machine room 2, a plate material 40 is arranged so as to span the facing bases 4. - 特許庁The first strut 22 is installed on the plate member 40 . At this time, it is desirable that the first support column 22 is installed such that the longitudinal direction of the base portion 224 is perpendicular to the extending direction of the rail 26 in consideration of installation stability. In addition, it is desirable that the plate member 40 have a width that allows the base portion 224 to fit within the range of the plate when the first struts 22 are arranged as described above. On the other hand, the second strut 24 is installed on the floor surface of the machine room in front of the hoisting machine 10 so that the rail 26 passes directly above the mounting position of the hoisting machine brake 12 to be replaced. At this time, the column heights of the first column 22 and the second column 24 are adjusted so that the rail 26 is horizontal at a height at which the hoisting machine brake 12 can be lifted.

Further, it is preferable that the machine room floor surface in front of the hoisting machine 10 can be used as a work space A1 for temporarily placing the removed old hoisting machine brake and the new hoisting machine brake to be installed. Therefore, in the lifting device 20 of the present embodiment, the length of the rail 26 is set so that the second strut 24 is installed across the working space A1. In the following description, the removed hoisting machine brake 12 is also referred to as "old hoisting machine brake 121", and the hoisting machine brake 12 to be installed is also referred to as "new hoisting machine brake 122".

According to the lifting device 20 configured as described above, the following functions and effects are obtained.

The lifting device 20 is installed so that the rail 26 passes right above the old hoisting machine brake 121 to be replaced. As a result, it is possible to prevent the removed old hoisting machine brake 121 from being shaken in the lateral direction, so that the safety of the replacement work can be enhanced. As a result, the size of the device can be reduced.

By installing the plate member 40 on the base 4, the degree of freedom in installing the first support column 22 can be increased. As a result, the lifting device 20 is installed so that the rail 26 passes directly above the hoisting machine brake 12 to be replaced, even for various types of hoisting machine 10, the layout of the machine room 2, and the arrangement of equipment . can do.

The second strut 24 is installed at a position straddling the work space A1. According to such a configuration, the work of lowering the removed old hoisting machine brake 121 to the work space A1 and the work of lifting the new new hoisting machine brake 122 can be performed efficiently.

The column height of the first column 22 is lower than the column height of the second column 24 . According to such a configuration, even if the first strut 22 is installed on the plate member 40 installed at a position higher than the floor surface of the machine room, it is possible to bring the rail 26 closer to the horizontal. Further, the first strut 22 and the second strut 24 are configured so that the strut height can be adjusted. As a result, the rails 26 can be brought closer to the horizontal even in an installation environment in which the height of the base 4 is different.

3. Replacement Procedure for the Hoisting Machine Brake Next, a procedure for replacing the hoisting machine brake 12 of the hoisting machine 10 using the lifting device 20 will be described. Although the replacement procedure for the hoisting machine brake 12 will be described here, the replacement of the hoisting machine brake 14 can be performed in the same procedure.

In the work of replacing the hoisting machine brake 12, a lifting device installation step, a hoisting machine brake removing step, and a hoisting machine brake attaching step are sequentially performed.

The lifting device installation step is a step of installing the lifting device 20 in the machine room 2 . 8 to 10 are diagrams for explaining the lifting device installation process in the hoisting machine brake replacement procedure. In the lifting device installation process, first, in the first step, the plate material 40 is arranged so as to span over the pair of bases 4 in the space between the machine room wall and the hoist, and is fixed with a clamp. In the next second step, the first strut 22, the second strut 24 and the rail 26 are prepared. The first support column 22 is temporarily arranged on the plate member 40, and the second support column 24 is temporarily arranged on the floor of the machine room. A rail 26 is fixed to the top of the first strut 22 and the second strut 24 . The pillar heights of the first pillar 22 and the second pillar 24 are adjusted so that the rail 26 approaches the horizontal. At this time, in order to secure a hanging margin for the trolley 28 and the hoist 30, the hoist brake 12 is set at a predetermined height, for example, 800 mm or more, higher than the top of the hoist brake 12 attached thereto.

In the second step, the positions of the first strut 22 and the second strut 24 are adjusted so that the rail 26 is positioned directly above the old hoisting machine brake 121 that is attached. Also, at this time, the positions of the first support 22 and the second support 24 are adjusted so that the work space A1 can be secured directly under the rail 26, which is the movable range of the trolley 28. FIG. The work space A1 here is a space in which both the new hoisting machine brake 122 to be replaced and the removed old hoisting machine brake 121 can be placed at once. A new hoisting machine brake 122 to be replaced is arranged in the work space A1.

The next third step is to attach the trolley 28 to the rail 26 . Next, the hoist 30 is attached to the trolley 28 .

The hoisting machine brake removing step is a step of removing the old hoisting machine brake 121 using the lifting device 20 . In the hoisting machine brake removing process, first, the hoist 30 is moved directly above the old hoisting machine brake 121 . Two eyebolts attached to the old hoisting machine brake 121 and the hoist 30 are connected with a belt or the like, and lifted to the extent that tension is applied. Next, cables and brake mounting bolts connected to the old hoisting machine brake 121 are removed, and the old hoisting machine brake 121 is removed from the hoisting machine 10 . At this time, since the hoist 30 is positioned directly above the hoisting machine brake 12, the old hoisting machine brake 121 is prevented from shaking when the old hoisting machine brake 121 is removed from the hoisting machine 10. .

The lifted old hoisting machine brake 121 is moved by the trolley 28 along the rail 26 to just above the work space A1 and lowered. FIG. 11 shows how the hoisting machine brake 12 is lowered to the work space A1 in the hoisting machine brake removing process. In this way, since the work space A1 is directly below the old hoisting machine brake 121, it is not necessary to lower the old hoisting machine brake 121 while towing it.

In the hoisting machine brake mounting process for mounting the new hoisting machine brake 122, the work procedure reverse to the removing process is performed. Typically, first, the hoist 30 is moved directly above the new hoist brake 122 placed in the work space A1. The hoist 30 lifts the new hoisting machine brake 122 and moves it to a position directly above the installation position of the new hoisting machine brake 122 on the hoisting machine 10 . Then, the new hoisting machine brake 122 is attached to the hoisting machine 10 with a brake mounting bolt, and cables are connected.

According to the installation method of the lifting device 20 and the replacement method of the hoisting machine brake as described above, it is possible to safely remove and replace the large hoisting machine brake.

4. Modified Example of Lifting Device for Hoist Brake The lifting device 20 of the embodiment may be modified as follows.

The first support 22 may be configured such that the top of the support 222 is rotatable with respect to the base 224 in a rotational direction about the central axis of the support. According to such a configuration, the first strut 22 can rotate the top of the strut 222 without moving the base 224, that is, the direction of the rail 26 fixed to the top of the head. As a result, even if the base portion 224 cannot be arranged in an ideal direction due to, for example, an installation space limitation of the first support 22, the rails 26 can be arranged in a desired direction. The same applies to the second strut 24. The second strut 24 is configured such that the top of the strut 242 is rotatable relative to the base 244 in the direction of rotation about the central axis of the strut. may As a result, the top of the support 222 , that is, the rail 26 fixed to the top of the head can be rotated without moving the base 244 .

At least one of the first support 22 and the second support 24 should be provided with the structure for adjusting the support height.

2 machine room 4 base 6,8 speed governor 10 hoisting machine 12,14 hoisting machine brake 20 lifting device 22 first strut 24 second strut 26 rail 28 trolley 30 Hoist 40 Board material 50 Lifting device 52 Strut 54 Rail 56 Trolley 58 Hoist 121 Old hoisting machine brake 122 New hoisting machine brake 222,242 Strut part 224,244 Base part

Claims (7)

A lifting device for lifting a hoisting machine brake mounted on a hoisting machine of an elevator installed in a machine room,
A plate material fixed on the base of the hoisting machine of the elevator higher than the machine room floor surface of the machine room;
a first post installed on the plate;
a second post installed on the floor of the machine room and longer than the first post;
a rail fixed to bridge the top of the first support and the top of the second support;
a trolley installed movably on the rail;
a hoist mounted on the trolley;
At least one of the first support and the second support is configured so that the height of the support can be adjusted so that the rail approaches horizontal,
The positions of the first column and the second column are determined so that the rail passes directly above the mounting position of the hoisting machine brake ,
the first strut and the second strut each include a base fixed to a lower end;
A lifting device for a hoisting machine brake of an elevator, wherein the top portions of the first strut and the second strut are rotatable with respect to the base portion. The rail is set to a length that secures a working space for moving the removed hoisting machine brake to the side of the second column in a state of being lifted by the hoist and lowering it onto the floor surface of the machine room. The lifting device of the hoisting machine brake of the elevator according to claim 1. A method for installing a lifting device for lifting a hoisting machine brake of an elevator installed in a machine room, comprising:
A first step of fixing the plate material on the base of the hoisting machine of the elevator, which is higher than the floor surface of the machine room;
A first strut is installed on the plate material, a second strut longer than the first strut is installed on the floor of the machine room, and the top of the first strut and the top of the second strut are horizontal. a second step of fixing the rail so as to span over the
a third step of movably mounting a trolley on the rail and mounting a hoist on the trolley;
The second step is
configured to determine the positions of the first column and the second column so that the rail passes directly above the mounting position of the hoisting machine brake ,
the first strut and the second strut each include a base fixed to a lower end;
The tops of the first support and the second support are configured to be rotatable relative to the base,
In the second step, the method of installing a lifting device includes rotating the top portion of the first support and the top portion of the second support and fixing the rail so as to extend over the rail. At least one of the first strut and the second strut is configured to be adjustable in strut height,
The second step is
4. The method of installing a lifting device according to claim 3 , wherein the rail is configured to adjust the column height of the first column or the second column so that the rail approaches horizontal. A work space for lowering the old hoisting machine brake removed from the hoisting machine and lifting the new hoisting machine brake newly attached to the hoisting machine is provided on the machine room floor of the machine room,
The second step is
5. The method of installing a lifting device according to claim 3 or 4, wherein the positions of the first column and the second column are determined such that the rail passes directly over the work space. A replacement method for replacing the hoisting machine brake of the elevator using the lifting device installed by the installation method according to claim 5 ,
moving the hoist directly above the mounting position of the old hoist brake attached to the hoist,
removing the old hoisting machine brake while suspending the old hoisting machine brake by the hoist;
moving the old hoisting machine brake directly above the work space by the trolley;
A method for replacing a hoisting machine brake configured to lower the old hoisting machine brake to the work space. moving the hoist directly above the new hoist brake placed in the work space;
The hoist lifts the new hoisting machine brake and moves it to a position immediately above the mounting position of the new hoisting machine brake on the hoist,
The replacement method of the hoisting machine brake according to claim 6 , wherein the new hoisting machine brake is attached to the hoisting machine.

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