JP2024029846A - Hoist carrying-in and installation method and hoist carrying-in and installation device for elevator - Google Patents

Abstract

To provide a device capable of easily installing a hoist at a prescribed position in a machine room and carry in and install the hoist in the machine room at low cost even if the device is for carrying the hoist of the elevator into the very small machine room of the elevator.SOLUTION: The hoist carrying-in and installation device for the elevator, which carries in and installs a hoist 5 in a machine room 1 using two portal doors, comprises at least: a first portal door 6 of a length in which one end of a trolley beam constituting the portal door protrudes outside from a machine room entrance 2; a second portal door 7 of a length in which the trolley beam does not protrude outside from the machine room entrance 2; a chain block 9a and a trolley 8a attached to the first portal door 6; a hitch wire rope 10a hooked to the chain block 9a; a chain block 9b and a trolley 8b attached to the second portal door 7; and a suspended hitch wire rope hooked to the chain block 9b.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for carrying in and installing an elevator hoisting machine, and a device for carrying in and installing the hoisting machine. The present invention relates to a method for carrying in and installing a hoisting machine of an elevator suitable for use in elevators, and a device for carrying in and installing the hoisting machine.

In elevator renewal work, for example, it is necessary to transport the hoisting machine from the entrance of the building through a passageway to the elevator machine room, and install the hoisting machine at a predetermined position in the machine room. Usually, two legs made of a single pipe or the like are fixed to a connecting member such as H steel, and the legs are placed inside the machine room, and a trolley made of H steel or the like is placed on top of the legs. After the beams were placed, the hoisting machine was carried into the machine room using a connected and fixed portal.

Patent Document 1 can be cited as a prior art document for transporting a hoist or the like into the machine room of such an elevator. This Patent Document 1 describes a method for transporting heavy objects using a portal structure in which three pairs of two legs made of single pipes are connected to two trolley beams made of H steel. A method for lifting and transporting heavy objects using a lifting machine is disclosed.

The conventional technology disclosed in Patent Document 1 mentioned above increases the transportation distance of heavy objects such as hoisting machines by connecting two trolley beams in series, that is, in the longitudinal direction of the H steel. there were.

JP2019-206423A

However, the machine rooms of elevators delivered to small condominiums are extremely small, and when upgrading the hoisting machine, carrying and installing the new hoisting machine into the machine room becomes an issue. Become. Specifically, in order to transport the newly manufactured hoisting machine to the front of the machine room, bring it into the narrow machine room, and install it at a predetermined position in the narrow machine room, it is necessary to use the gate type hoist with the structure of Patent Document 1 described above. However, it was difficult to install the gate type in a narrow machine room.

In addition, as a method other than the gate type construction described in Patent Document 1 mentioned above, a method of driving an anchor bolt in the machine room and installing a plurality of hanging brackets is common. It is necessary to search for buried objects and check the strength of the wall before installing, and if anchor bolts cannot be installed, it is necessary to outsource to a towing company, which is costly.

The present invention has been made in view of the above points, and its purpose is to carry an elevator hoisting machine into a very small machine room of an elevator delivered to a small condominium, etc. Also, the hoisting machine can be easily installed in a predetermined position in the machine room, and the hoisting machine can be carried into the machine room and installed at low cost. Our goal is to provide equipment for transporting and installing equipment.

In order to achieve the above object, the method of carrying in and installing an elevator hoisting machine of the present invention involves carrying an elevator hoisting machine into an elevator machine room using two portals and installing the elevator hoisting machine. A method for carrying in and installing an upper machine,
The two gates include a first gate, in which one end of the trolley beam constituting the gate protrudes outward from the entrance/exit of the machine room of the elevator, and the gate. The trolley beam is comprised of a second portal having a length that does not protrude outside from the machine room entrance of the elevator,
The trolley beam of the first portal and the second trolley are parallel, and one end of the trolley beam of the first portal is connected to the outside from the machine room entrance. installed in the machine room so as to protrude from the machine room, and install the trolley beam of the second portal so as not to protrude outside from the machine room entrance;
Next, the newly manufactured hoisting machine loaded on the trolley is transported so that the trolley beam of the first portal is directly below the part protruding from the machine room entrance, and then the new hoist is loaded onto the trolley. The loaded newly manufactured hoist is lifted using a chain block and a trolley attached to the first gate type hoist and a sling wire rope hung on the chain block, and the hoist is lifted. The machine is moved by moving the newly manufactured hoisting machine with the trolley of the first gantry in a lifted state along the trolley beam of the first gantry into the machine room. carried into the room,
Next, a wire rope for hanging a sling hanging from a chain block attached to the second gate installed in the machine room is attached to the new hoisting machine that has been carried into the machine room. Wrap it around and put it in a fighting hanging state, and operate the chain block of the first gate-type hoist and the chain block of the second gate-type hoist to change the posture of the newly manufactured hoist;
Next, while pulling up the chain hoist of the second gantry, pull down the chain block of the first gantry, and move it in a lifted state to the installation position in the machine room. Then, when the newly manufactured hoisting machine can be moved while being lifted to the installation position in the machine room, the chain block of the second portal type is pulled up, and the newly manufactured hoisting machine is moved. It is characterized in that it is installed at a predetermined position within the machine room.

Moreover, in order to achieve the above object, the elevator hoisting machine carrying-in and installation device of the present invention is an elevator in which the elevator hoisting machine is carried into and installed in the machine room of the elevator using two portals. A hoisting machine import and installation device,
The hoisting machine loading and installation device for the elevator includes: a first gate-type rack having a length such that one end of the trolley beam constituting the gate-type wire protrudes outside from the machine room entrance/exit of the elevator; a second gate-shaped trolley beam having a length such that the trolley beam constituting the trolley does not protrude outside from the machine room entrance of the elevator;
The first gate lifts a newly manufactured hoisting machine loaded on a trolley and transports the newly lifted hoisting machine into the machine room in a lifted state. A chain block and a trolley attached to the chain block, and a sling wire rope hung on the chain block of the first gate block;
A chain block and a trolley attached to the second gate-shaped roller are tied to the newly manufactured hoist that is attached to the second gate-shaped roller and carried into the machine room, and the trolley is in a fighting hanging state. and operating the chain block of the first gantry and the chain block of the second gantry to change the posture of the newly manufactured hoist. The apparatus is characterized by comprising at least a wire rope for hanging a sling hanging on a chain block.

According to the present invention, for example, even if an elevator hoisting machine is to be carried into a very small machine room of an elevator delivered to a small condominium, the hoisting machine can be easily moved to a predetermined position in the machine room. The hoisting machine can be carried into the machine room and installed at low cost.

FIG. 2 is a perspective view showing a state in which a newly manufactured hoisting machine is carried into an elevator machine room and installed according to a first embodiment of the elevator hoisting machine carrying-in and installation device of the present invention. FIG. 2 is a perspective view showing a state in which a newly manufactured hoist is carried into an elevator machine room and a newly manufactured hoist is suspended in the installation device according to Example 1 of the elevator hoisting machine and the installation device of the present invention. FIG. 2 is a perspective view showing a state in which a newly manufactured hoisting machine is carried into a machine room of an elevator according to Example 1 of the elevator hoisting machine and installation device of the present invention, and the hoisting machine is installed at a predetermined position in the installation device. . FIG. 3 is a top view showing a newly manufactured hoisting machine being carried into an elevator machine room according to Example 1 of the elevator hoisting machine and the installation apparatus of the present invention, and a state in which the hoisting machine is suspended in a fighting manner in the installation apparatus.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for carrying in and installing a hoisting machine of an elevator and a device for carrying in and installing the hoisting machine of the present invention will be explained based on the illustrated embodiment. In each figure, the same reference numerals are used for the same components.

1, 2, 3, and 4 show a first embodiment of an elevator hoisting machine carrying-in and installation method and a hoisting machine carrying-in and installation device of the present invention.

FIG. 1 is a perspective view showing how a newly manufactured hoisting machine is carried into an elevator machine room and installed according to Example 1 of the elevator hoisting machine carrying-in and installation device of the present invention. Carrying in an elevator hoisting machine, carrying a new hoisting machine into the elevator machine room according to Embodiment 1 of the installation device, and a perspective view showing the newly made hoisting machine hanging in the installation device. FIG. 4 is a perspective view showing how the hoisting machine of an elevator according to the invention is carried in and a newly manufactured hoisting machine is carried into the machine room of the elevator according to the first embodiment of the installation device, and the hoisting machine is installed at a predetermined position in the installation device. FIG. 2 is a top view showing a newly manufactured hoisting machine being carried into an elevator machine room according to Example 1 of the elevator hoisting machine and the installation apparatus of the present invention, and a state in which the hoisting machine is suspended in a fight in the installation apparatus.

As shown in the figure, the machine room 1 of the existing elevator to be renovated consists of a machine room ceiling 1a, a machine room wall 1b, and a machine room floor 1c. Renewal parts such as the winding machine 5 are brought in. At this time, the newly manufactured hoisting machine 5 is loaded onto a trolley 12 or the like, and is transported to the machine room entrance 2 through the passage 3 which is the carry-in route. Furthermore, the machine room 1 of an elevator installed in a small condominium or the like is extremely narrow.

In addition, in the figure, 6 is a first gate-type pedestal, and this first gantry 6 has two legs 6c of the first gantry 6, and two first gate-shaped pedestals 6. The first leg part 6a of the first gate-shaped part 6 has a portal shape and is composed of a connecting member 6d of the first portal part 6 which connects the upper part of the leg 6c of the part 6 at a certain interval. , a second leg 6b of the first portal 6 having the same structure as the first leg 6a of the first portal 6, and a first leg 6a of the first portal 6. It is generally composed of a trolley beam 6e of the first gantry 6 made of H steel or the like, which connects the upper part of the second leg 6b of the first gantry 6.

Note that the legs 6c of the first portal 6, which constitute the first leg 6a of the first portal 6 and the second leg 6b of the first portal 6, have a pipe shape. It has an adjustable length. Further, one end of the trolley beam 6e of the first gantry 6 is arranged such that the second leg 6b of the first gantry 6 is close to the machine room wall 1b in the depth direction of the machine room 1. Sometimes, the length is such that it protrudes from the machine room entrance/exit 2 to the outside. That is, the protruding length of the trolley beam 6e of the first portal 6 to the outside from the machine room entrance 2 is such that the trolley 12 can fit under the protruding portion of the trolley beam 6e of the first portal 6. It has a protruding length of .

In addition, in the figure, 7 is a second gate type foot 7, and this second gate type foot 7 is the same as the first leg 6a constituting the first gate type foot 6. The two first legs 7a of the second gate-type legs 7 are used, and the two first legs 7a of the second gate-shaped legs 7 are attached to the second leg with a certain interval at the upper part. The second leg 7b of the second gate 7 is connected by a connecting member 7d of the gate 7, and the second leg 7b of the second gate 7 is made of the same material as the leg 6c of the first gate 6. The gate type employment 7 in 2 has a total of three legs.

That is, in the second gate type 7, the upper parts of the first leg 7a of the second gate 7 and the second foot 7b of the second gantry 7 are made of H steel or the like. They are connected by a trolley beam 7e, and while the first gantry 6 has four legs, the second gantry 7 has three legs.

Moreover, the trolley beam 7e of the second portal type 7 is arranged such that the second leg 7b of the second portal 7 is arranged close to the machine room wall 1b in the depth direction of the machine room 1. In addition, the length is such that it can be installed inside the machine room 1. In other words, the trolley beam 7e of the second gate type 7 has a length that does not protrude outside from the machine room entrance 2, that is, the trolley beam 7e of the second gate type 7 fits within the machine room 1. The length is such that it does not protrude.

Next, the trolley 8a and chain block 9a of the first gate 6 are movable along the trolley beam 6e of the first gate 6. The trolley 8b and chain block 9b of the second gantry 7 move along the trolley beam 7e of the second gantry 7. Installed as possible.

Further, a sling wire rope 10a is hung on the chain block 9a of the first gate-type hoist 6, and the new hoist 5 can be lifted using this sling wire rope 10a.

In addition, the first gantry 6 and the second gantry 7 are such that the trolley beam 6e of the first gantry 6 and the trolley beam 7e of the second gantry 7 are separated from the single pipe and the clamp. The second leg 6b of the first gantry 6 and the second leg 7b of the second gantry 7 are connected by the first connecting member 11a configured to connect the single pipe and the clamp. They are connected by a second connecting member 11b configured as shown in FIG. In addition, the code|symbol 4 is an existing hoisting machine base.

FIGS. 1 and 2 show how to install the newly manufactured hoisting machine 5 in a predetermined position in the machine room 1 using the first gate type 6 and second gate type 7 constructed and installed in this way. , will be explained using FIGS. 3 and 4.

First, the first portal 6 is installed in the machine room 1 so that one end of the trolley beam 6e of the first portal 6 protrudes from the machine room entrance 2, and the second portal 7 is installed in the machine room 1 so that the trolley beam 7e of the second gate-type train 7 does not protrude (protrude) from the machine room entrance 2, and the trolley beam 6e of the first gate-type train 6 and the trolley beam 7e of the second portal type 7 are installed so that they are parallel to each other. Then, using the first and second connecting members 11a and 11b, the first gate type 6 and the second portal 7 are connected as described above.

Next, the newly manufactured hoist 5 loaded on the trolley 12 is transported across the passage 3 to the front of the machine room entrance 2. That is, the newly manufactured hoist 5 loaded on the trolley 12 is transported so that the trolley beam 6e of the first portal 6 is directly below the portion protruding from the machine room entrance 2.

At this time, since one end of the trolley beam 6e of the first gantry 6 protrudes beyond the machine room entrance/exit 2, the newly manufactured hoist 5 loaded on the trolley 12 is moved from the first gantry. Lifting can be carried out using the slinging wire rope 10a hung on the chain block 9a, the chain block 9a of the first portal 6, and the trolley 8a.

The lifted new hoist 5 moves the trolley 8a of the first gantry 6 along the trolley beam 6e of the first gantry 6 into the machine room 1 in a lifted state. The machine is carried into the machine room 1 (the state shown in FIG. 1).

Next, the fighting wire rope 10b attached to the trolley 8b and the chain block 9b of the second gate 7 installed in the machine room 1 is connected to the machine. Wrap it around the newly manufactured hoist 5 that has been brought into the room 1 and put it in a suspended state, and operate the chain block 9a of the first gate-type hoist 6 and the chain block 9b of the second gate-type hoist 7. , change the orientation of the new hoist 5 to the direction in which it will be installed on the existing hoist base 4 (change the orientation of the new hoist 5 from the direction shown in Fig. 1 to the direction shown in Fig. 2). ).

Next, by pulling up the chain block 9b of the second gantry 7 and pulling down the chain block 9a of the first gantry 6, the new hoist 5 is placed in a predetermined position, i.e. , the existing hoisting machine base 4 is moved in a lifted state to the installation position (the new hoisting machine 5 is moved from the position shown in FIG. 2 to the position shown in FIG. 3).

While performing these operations, the lifting position of the new hoisting machine 5, that is, the center of gravity of the new hoisting machine 5 moves, but the lifting position of the new hoisting machine 5 moves; Since the first gantry 6 and the second gantry 7 are firmly fixed, the newly manufactured hoist 5 can be lifted and moved in a stable state.

When the new hoist 5 can be moved while being lifted to the installation position of the existing hoist base 4, the chain block 9b of the second gate-type hoist 7 is pulled up, and the new hoist 5 is moved. 5 is installed on the existing hoisting machine base 4.

In the above-described embodiment, the first gate type 6 and the second gate type 7 are connected using the first and second connecting members 11a and 11b, but the machine room ceiling 1a, the machine room wall 1b, or the machine room floor 1c using a tension rod method.

For example, the first gantry 6 and the second gantry 7 may be directly fixed to the machine room ceiling 1a, the machine room wall 1b, or the machine room floor 1c using tension rods, or the first connecting member 11a may be and/or fixing the first gate type 6 and the second gate type 7 to the machine room ceiling 1a, the machine room wall 1b, or the machine room floor 1c with a tension rod via the second connecting member 11b. But it's okay.

In addition, the legs 7c of the second portal 7, which constitute the second portal 7, are shown as having three legs due to the size of the machine room 1 and the arrangement of existing equipment. If there is enough space for 1, 4 may be sufficient.

In carrying in and installing the hoisting machine of the elevator of this embodiment configured as described above, it is possible to easily carry the hoisting machine into the very small machine room 1 that is delivered to small-scale condominiums. It is possible to install

In addition, since the two first gate-type lifters 6 and second gate-type lifters 7 are connected by clamps and single pipes, they can stably lift even heavy objects such as hoisting machines. Is possible.

In addition, since the newly manufactured hoisting machine 5 is hung in this state and installed in a predetermined position, the newly manufactured hoisting machine 5 can be easily installed in the extremely small machine room 1 that is delivered to small-scale condominiums. It can be carried in and there is no need to drive anchor bolts into the machine room 1 and install multiple hanging brackets, so there is no need to search for buried objects or check the strength of walls before driving anchor bolts. In addition, there is no need to outsource the cost of outsourcing to a bolter when anchor bolts cannot be driven.

Therefore, according to this embodiment, even if an elevator hoisting machine is to be carried into a very small machine room of an elevator delivered to a small condominium, the hoisting machine can be moved to a predetermined location in the machine room. It can be easily installed at any location, and has the effect of allowing the hoist to be carried into the machine room and installed at low cost.

Note that the present invention is not limited to the embodiments described above, and includes various modifications. For example, the embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Furthermore, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace a part of the configuration of each embodiment with other configurations.

1... Elevator machine room, 1a... Machine room ceiling, 1b... Machine room wall, 1c... Machine room floor, 2... Machine room entrance/exit, 3... Passage, 4... Existing hoisting machine base, 5... New hoisting machine , 6...first portal employment, 6a...first leg of the first portal employment, 6b...second leg of the first portal employment, 6c...leg of the first portal employment , 6d... Connecting member of the first portal, 6e... Trolley beam of the first portal, 7... Second portal, 7a... First leg of the second portal, 7b ...Second leg of the second portal, 7c...Legs, 7d...Connecting member of the second portal, 7e...Trolley beam of the second portal, 8a...First portal trolley, 9a... first chain block, 8b... second trolley, 9b... second chain block, 10a... sling wire rope, 10b... fight hanging sling wire Rope, 11a...first connection member, 11b...second connection member, 12...truck.

Claims (9)

A method for carrying and installing an elevator hoisting machine in which the hoisting machine for an elevator is carried into and installed in an elevator machine room using two gate-type cages, the method comprising:
The two gates include a first gate, in which one end of the trolley beam constituting the gate protrudes outward from the entrance/exit of the machine room of the elevator, and the gate. The trolley beam is comprised of a second portal having a length that does not protrude outside from the machine room entrance of the elevator,
The trolley beam of the first portal and the second trolley are parallel, and one end of the trolley beam of the first portal is connected to the outside from the machine room entrance. installed in the machine room so as to protrude from the machine room, and install the trolley beam of the second portal so as not to protrude outside from the machine room entrance;
Next, the newly manufactured hoisting machine loaded on the trolley is transported so that the trolley beam of the first portal is directly below the part protruding from the machine room entrance, and then the new hoist is loaded onto the trolley. The loaded newly manufactured hoist is lifted using a chain block and a trolley attached to the first gate type hoist and a sling wire rope hung on the chain block, and the hoist is lifted. The machine is moved by moving the newly manufactured hoisting machine with the trolley of the first gantry in a lifted state along the trolley beam of the first gantry into the machine room. carried into the room,
Next, a wire rope for hanging a sling hanging from a chain block attached to the second gate installed in the machine room is attached to the new hoisting machine that has been carried into the machine room. Wrap it around and put it in a fighting hanging state, and operate the chain block of the first gate-type hoist and the chain block of the second gate-type hoist to change the posture of the newly manufactured hoist;
Next, while pulling up the chain hoist of the second gantry, pull down the chain block of the first gantry, and move it in a lifted state to the installation position in the machine room. Then, when the newly manufactured hoisting machine can be moved while being lifted to the installation position in the machine room, the chain block of the second portal type is pulled up, and the newly manufactured hoisting machine is moved. A method for carrying in and installing an elevator hoist, the method comprising installing and installing an elevator hoist at a predetermined position in the machine room. A method for carrying in and installing an elevator hoisting machine according to claim 1,
An elevator characterized in that the hoisting machine is carried into the machine room of the elevator and installed in a state where the first gate type and the second gate type are connected by a connecting member. How to bring in and install the hoist. The elevator hoisting machine carrying-in and installation method according to claim 2,
The first gate type is a first gate type that connects two legs of the first gate type and the upper parts of the two legs of the first gate type with a certain interval. a first leg of a first gate-shaped bridge formed of a connecting member; and a first leg having the same structure as the first leg of the first portal-shaped bridge. a second leg of the trolley; and the trolley beam of the first portal connecting the first leg and the upper part of the second leg;
The second gantry uses two first legs of the second gantry that are the same as the first legs constituting the first gantry. , the first legs of the two second gates are connected at the upper portions with a fixed interval by a connecting member of the second gates; The second leg of the kata-gata uses the same product as the first leg of the kata-ga, and the second leg of the kata-gata consists of a total of three legs,
The first gantry and the second gantry are such that the trolley beam of the first gantry and the trolley beam of the second gantry are connected by a first connecting member; The hoisting of the elevator to the machine room in a state where the second leg of the first portal and the second leg of the second portal are connected by a second connecting member. A method for carrying in and installing an elevator hoisting machine, characterized in that the machine is carried in and installed. A method for carrying in and installing an elevator hoisting machine according to claim 1,
The first gate-type elevator and the second gate-type elevator are characterized in that the hoisting machine is carried into the machine room of the elevator and installed while being fixed in the machine room with a tension rod. How to bring in and install an elevator hoist. An elevator hoisting machine carrying and installation device for carrying and installing an elevator hoisting machine into an elevator machine room using two gate-type cages,
The hoisting machine loading and installation device for the elevator includes: a first gate-type rack having a length such that one end of the trolley beam constituting the gate-type wire protrudes outside from the machine room entrance/exit of the elevator; a second gate-shaped trolley beam having a length such that the trolley beam constituting the trolley does not protrude outside from the machine room entrance of the elevator;
The first gate lifts a newly manufactured hoisting machine loaded on a trolley, and transports the newly lifted hoisting machine into the machine room in a lifted state. A chain block and a trolley attached to the chain block, and a sling wire rope hung on the chain block of the first gate block;
The chain block and trolley attached to the second gate-shaped roller are tied to the newly manufactured hoisting machine, which is attached to the second gate-shaped roller and carried into the machine room. and operating the chain block of the first gate-type hoist and the chain block of the second gate-type hoist to change the posture of the newly manufactured hoist. An elevator hoisting machine carrying-in and installation device comprising at least a wire rope for hanging a sling hung on a chain block. The elevator hoisting machine carrying-in and installation device according to claim 5,
The first gate type is a first gate type that connects two legs of the first gate type and the upper parts of the two legs of the first gate type with a certain interval. a first leg of a first gate-shaped bridge formed of a connecting member; and a first leg having the same structure as the first leg of the first portal-shaped bridge. a second leg of the trolley; and the trolley beam of the first portal connecting the first leg and the upper part of the second leg;
The second gantry uses two first legs of the second gantry that are the same as the first legs constituting the first gantry. , the first legs of the two second gates are connected at the upper portions with a fixed interval by a connecting member of the second gates; The second leg of the kata-gata uses the same product as the first leg of the kata-ga, and the second leg of the kata-gata consists of a total of three legs,
The first gantry and the second gantry are such that the trolley beam of the first gantry and the trolley beam of the second gantry are connected by a first connecting member; Carrying in a hoisting machine for an elevator, wherein the second foot of the first gate and the second foot of the second gate are connected by a second connecting member. , installation equipment. The elevator hoisting machine carrying-in and installation device according to claim 6,
An elevator hoisting machine carrying-in and installation device, wherein the first and second gate-shaped legs are pipe-shaped and have adjustable lengths. The elevator hoisting machine carrying-in and installation device according to claim 5,
The length of the protrusion of the trolley beam of the first gantry to the outside from the machine room entrance is such that the trolley can fit under the protruding portion of the trolley beam of the first gantry. An elevator hoisting machine loading and installation device characterized by a long length. The elevator hoisting machine carrying-in and installation device according to claim 5,
An elevator hoisting machine carrying-in and installation device, characterized in that the first gate-type gearbox and the second gate-type gearbox are fixed to the machine room with tension rods.

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