JP6956651B2 - Lifting method of escalator truss - Google Patents

Description

The present invention relates to a lifting method for an escalator truss used when exchanging old and new escalator trusses in a new construction for removing an escalator.

Conventionally, an escalator may be installed in a stairwell in a building. When renewing the escalator installed in such a stairwell to a new one, for example, the escalator truss is removed and installed as shown in FIG.

FIG. 3 is a diagram showing a state in which an escalator truss is installed in a stairwell in a building. FIG. 3 shows a building 10 having a stairwell portion 12 from the first floor to the sixth floor. Further, FIG. 3 shows a case where the escalator truss ET is installed between the 6th floor and the 5th floor in the atrium 12.

First, the installation of the escalator truss ET in the atrium 12 will be described with reference to FIG. 3, and then the removal of the escalator truss ET will be described.

As shown in FIG. 3, the building 10 includes an entrance 14 for loading and unloading the escalator truss ET. The height and width of the entrance 14 is defined by an opening formed in the wall of the building 10. The entrance 14 has, for example, a height of 2900 mm and a width of 1900 mm.

The escalator truss ET is carried into the building 10 in a state of being divided into an upper end portion ET1 and a lower end portion ET2 so that the entrance 14 having such a size can be passed through. The upper end portion ET1 and the lower end portion ET2 are mounted on the carriage 2 and conveyed.

The upper end portion ET1 and the lower end portion ET2 carried into the building 10 are connected and fixed to each other by using, for example, bolts, nuts, connecting members, and the like. As a result, the escalator truss ET is assembled. If necessary for such a connecting operation, a lifting device 16 attached to a building beam H1 provided on the ceiling of the first floor may be used. Specifically, either the upper end portion ET1 or the lower end portion ET2 can be lifted by the lifting device 16 so as to have a height and orientation suitable for connecting to each other. For the lifting device 16, for example, an electric chain block is preferably used. The fact that the electric chain block is preferably used as the lifting device is the same in the following description.

As shown in FIG. 3, two lifting devices 18 are attached to the building beam H2 located at the uppermost portion or the ceiling portion of the atrium 12. The wires 20 drawn from each lifting device 18 are connected to both sides in the width direction of the upper end portion ET1 of the escalator truss ET assembled on the first floor. The connection here is performed, for example, by hooking a hook at the tip of the wire 20 on a connecting tool 22 that is fastened and fixed to the escalator truss ET with bolts or the like. The width direction of the escalator truss ET means a horizontal direction orthogonal to the truss extending direction.

Further, two lifting devices 24 are attached to the building beam H3 located on the ceiling of the fifth floor of the atrium 12. The wires 26 drawn from each lifting device 24 are connected to both sides in the width direction of the lower end portion ET2 of the escalator truss ET assembled on the first floor.

By operating the lifting devices 18 and 24 in this state, the escalator truss ET is lifted as shown in FIG. Then, the upper engaging portion protruding from the upper end portion ET1 of the escalator truss ET is hooked on the landing entrance on the 6th floor to engage, and the lower engaging portion protruding from the lower end portion ET2 is engaged on the 5th floor. Hook it on the landing entrance and engage it. Then, at least one engaging portion of the escalator truss ET arranged in this way is fixed to the floor structure by, for example, bolts, welding, or the like. This completes the installation of the escalator truss ET.

After that, the escalator is completed by assembling the drive motor, drive chain, step, balustrade, moving handrail, etc. to the escalator truss ET.

Next, the escalator truss ET installed between the 5th floor and the 4th floor in the atrium 12 shown in FIG. 3 is provided with a lifting device attached to the escalator truss ET of the upper escalator installed earlier. This lifting device can be used to lift and install from the first floor. The escalator truss ET further below can be installed in the same manner.

On the other hand, when removing the escalator installed in the atrium 12, the escalator located below is removed in order. Specifically, in the example shown in FIG. 3, the escalator installed between the second floor and the first floor is first removed. When removing the escalator, first remove the moving handrail, balustrade, steps, etc. from the escalator truss. Subsequently, the drive motor, drive chain, etc. are removed from the escalator truss. The escalator truss whose weight is reduced by removing each member in this way is lifted by using a lifting device arranged on the building beam on the ceiling or the escalator truss above, and is divided into desired sizes. The division at the time of removal is not limited to the case where the upper end portion ET1 and the lower end portion ET2 are divided, and may be blown into an appropriate size that can be easily carried out from the entrance 14 by using a burner or the like.

When the escalator installed between the 2nd floor and the 1st floor is removed in this way, then the escalator installed between the 3rd floor and the 2nd floor is removed in the same procedure. .. By repeating this, the top escalator (that is, the escalator installed between the 6th floor and the 5th floor) can be removed.

When the escalator provided in the atrium 12 is removed and renewed with a new one in this way, the escalator removal new construction can be performed by performing the removal work and the installation work as described above.

For example, Patent Document 1 discloses a method for renewing a passenger conveyor. In this renewal method, it is described that a plurality of gantry lifting devices are installed on the existing frame, and the new frame is lifted by the chain block of these gantry lifting devices and installed in the existing frame.

Japanese Unexamined Patent Publication No. 2008-44684

When removing and constructing a new escalator installed in the atrium as described above, there may be no building beam to attach the lifting device to the ceiling of the atrium. For example, the ceiling of the atrium is covered with glass, and there is no sturdy building beam. In this case, the problem is how to lift and lower the escalator truss. When replacing the existing escalator truss with a new escalator truss, the technique described in Patent Document 1 above cannot be applied.

An object of the present invention is to provide an escalator lifting method capable of easily removing and newly installing an escalator truss even when a structure capable of supporting a lifting device cannot be secured above.

In the lifting method of the escalator truss according to the present invention, an upper section type pedestal supported by an upper building beam is erected, a lower section type pedestal supported by a lower building beam is erected, and the upper section type pedestal is erected. At least two connecting beams are erected over the lower section type pedestal, and in the two connecting beams, the upper suspension beam is fixed to the upper end portion thereof, and the lower suspension beam is fixed to the lower end portion thereof. An upper lifting device is arranged on the upper suspension beam, a lower lifting device is arranged on the lower suspension beam, the upper end portion of the escalator truss is suspended and supported by the upper lifting device, and the lower lifting device is used. The lower end of the escalator truss is suspended and supported, and the escalator truss is lifted and lowered by the upper lifting device and the lower lifting device.

In the lifting method of the escalator truss according to the present invention, two upper suspension beams are provided, and first and second upper lifting devices are arranged in each upper suspension beam, and the lower suspension beam is 2. The first and second lower lifting devices are arranged in each of the lower hanging beams, and the first upper and lower lifting devices can suspend and support the escalator truss in the vertical direction. The second upper and lower lifting devices can preferably be used to move the suspended and supported escalator truss in the horizontal direction.

In this case, at least one of the second upper and lower lifting devices may be arranged at a position where a tensile force is applied to the outside of the escalator truss with respect to the escalator truss.

Further, in the lifting method of the escalator truss according to the present invention, an intermediate lifting beam is fixed to an intermediate portion between the upper end portion and the lower end portion of the connecting beam, and an intermediate lifting device is arranged on the intermediate suspension beam. The intermediate portion of the escalator truss may be lifted and lowered by the intermediate lifting device.

In this case, the intermediate suspension beam may be configured so that the fixed position can be changed with respect to the extending direction of the two connecting beams.

In the lifting method of the escalator truss according to the present invention, the support pedestal is composed of the upper division type pedestal, the lower division type pedestal, and at least two connecting beams, and the upper suspension beam and the lower suspension beam provided on the support pedestal are formed. An upper lifting device and a lower lifting device are arranged, and the escalator truss is lifted and lowered by these lifting devices. Therefore, according to the escalator truss lifting method according to the present invention, even when a structure capable of supporting the lifting device cannot be secured upward, the escalator truss can be easily removed and newly installed.

It is a top view and the side view which shows the support pedestal used for the lifting method which is one Embodiment of this invention. It is a figure which shows the example which the 2nd lifting device is arranged at the position protruding from the gate type pedestal. FIG. 3 is a diagram showing an example of a conventional construction method in which an escalator truss is installed in a stairwell in a building.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, etc. are examples for facilitating the understanding of the present invention, and can be appropriately changed according to applications, purposes, specifications, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that those characteristic portions are appropriately combined and used.

FIG. 1 is a top view and a side view showing a support stand 30 used in the lifting method of the escalator truss ET according to the embodiment of the present invention. FIG. 1 shows an example in which the escalator truss ET is divided into three parts.

As shown in FIG. 1, the support pedestal 30 in the present embodiment includes an upper section type pedestal 32, a lower section type pedestal 34, and two connecting beams 36.

The upper section type pedestal 32 includes two columns 32a erected along the vertical direction and a cross beam 32b erected at the upper end of each column 32a, and is configured to form a U-shape in a side view. Has been done. The columns 32a and the cross beams 32b are preferably formed of, for example, a long H-shaped steel material, but if they have strength enough to withstand the hanging load of the escalator truss ET, for example, an L-shaped steel material or a square metal. It may be composed of other long members such as pipes. Further, the support column 32a and the cross beam 32b may be directly connected by, for example, bolts and nuts, or may be connected and fixed via a connecting member (not shown). The upper section type gantry 32 is erected at the landing entrance of the upper floor 4 in a state of being supported by the upper building beam H4 of the upper floor 4.

The lower department type pedestal 34 can also be configured in the same manner as the upper department type pedestal 32. That is, the lower section type pedestal 34 includes two columns 34a erected along the vertical direction and a cross beam 34b erected at the upper end of each column 34a so as to form a U-shape in a side view. It is configured in. The columns 34a and the cross beams 34b are preferably formed of, for example, a long H-shaped steel material, but if they have enough strength to withstand the hanging load of the escalator truss ET, for example, an L-shaped steel material or a square metal. It may be composed of other long members such as pipes. Further, the support column 34a and the cross beam 34b may be directly connected by, for example, bolts and nuts, or may be connected and fixed via a connecting member (not shown). The lower section type gantry 34 is erected at the landing entrance of the lower floor 6 in a state of being supported by the lower building beam H5 of the lower floor 6.

In the upper department type pedestal 32 and the lower department type pedestal 34, inclined columns connected to the columns 32a and 32b in an inclined posture are provided to stabilize the upper department type pedestal 32 and the lower department type pedestal 34, respectively. It may be configured so that it can be erected. Alternatively, a flat leg plate may be connected and fixed to the lower end surfaces of the columns 32a and 32b so that the upper section type pedestal 32 and the lower section type pedestal 34 can be erected stably.

The two connecting beams 36 are erected over the upper section type pedestal 32 erected on the upper floor 4 and the lower section type pedestal 34 erected on the lower floor 6. The connecting beam 36 is also preferably constructed of, for example, an H-shaped steel material. The two connecting beams 36 are erected in parallel with each other. The end portion of each connecting beam 36 on the upper floor side is connected to the upper end portion of the upper section type gantry 32. The lower floor end of each connecting beam 36 is connected to the upper end of the lower section type gantry 34. Each connecting beam 36, the upper section type pedestal 32, and the lower section type pedestal 34 may be directly fastened and fixed using, for example, bolts and nuts, or may be connected and fixed via a connecting tool (not shown). ..

The connecting beam 36 may be configured as an integral long member by connecting a plurality of beam members. The beam members may be directly connected by, for example, bolts and nuts, or may be connected via a connecting member (not shown). By configuring the connecting beam 36 with a plurality of beam members in this way, it is possible to more easily carry out the transport and erection work of each beam member.

In the present embodiment, the case where two connecting beams 36 are provided will be described, but the present invention is not limited to this, and three or more connecting beams may be erected. However, in order to facilitate the assembly of the support frame 30 and to make it lighter, it is preferable to use two connecting beams 36.

In the support frame 30, two upper suspension beams 38a and 38b are fixed to the upper end of the connecting beam 36. The upper suspension beams 38a and 38b are fastened and fixed to the upper surfaces of the two connecting beams 36 by, for example, bolts and nuts. In the present embodiment, the upper suspension beams 38a and 38b are also preferably configured by the H-shaped steel material.

The upper suspension beams 38a and 38b are erected between the two connecting beams 36 in a state parallel to each other. One upper suspension beam 38a is arranged at a position closer to the upper end of the connecting beam 36 than the other upper suspension beam 38b.

In one upper suspension beam 38a, two upper lifting devices (first upper lifting device) 39a are arranged at a distance substantially corresponding to the width dimension of the escalator truss ET. Further, in the other upper suspension beam 38b, two upper lifting devices (second upper lifting devices) 39b are arranged at a distance substantially corresponding to the width dimension of the escalator truss ET. For the upper lifting devices 39a and 39b, for example, an electric chain block is preferably used.

The lower ends of the two wires 40a extending from the upper lifting device 39a attached to one upper suspension beam 38a are connected to the connecting members 22 fixed to both sides in the width direction of the upper end of the escalator truss ET. As a result, when the upper end of the escalator truss ET is suspended by the upper lifting device 39a, the wire 40a hangs down along the vertical direction.

The two wires 40b extending from the upper lifting device 39b attached to the other upper suspension beam 38b extend vertically from a position above the escalator truss ET and are connected to the connector 22. .. Since the wires 40b are connected in an inclined direction in this way, the wire 40b is wound up by the upper lifting device 39b to exert a pulling force for moving the escalator truss ET inward in the horizontal direction indicated by the arrow A. be able to. Here, the "inside" means the direction from the end side to the center side in the escalator truss ET, and the "outside" described later means the opposite direction.

In the support frame 30, two lower suspension beams 42a and 42b are fixed to the lower end of the connecting beam 36. The lower suspension beams 42a and 42b are fastened and fixed to the upper surfaces of the two connecting beams 36 by, for example, bolts and nuts. In the present embodiment, the lower suspension beams 42a and 42b are also preferably configured by the H-shaped steel material.

The lower suspension beams 42a and 42b are erected between the two connecting beams 36 in a state parallel to each other. One lower suspension beam 42a is arranged at a position closer to the lower end of the connecting beam 36 than the other lower suspension beam 42b.

In one lower suspension beam 42a, two lower lifting devices (first lower lifting device) 43a are arranged at a distance substantially corresponding to the width dimension of the escalator truss ET. Further, in the other lower suspension beam 42b, two lower lifting devices (second lower lifting devices) 43b are arranged at a distance substantially corresponding to the width dimension of the escalator truss ET. For the lower lifting devices 43a and 43b, for example, an electric chain block is preferably used.

The lower ends of the two wires 44a extending from the lower lifting device 43a attached to one lower suspension beam 42a are connected to the connecting members 22 fixed to both sides of the lower end of the escalator truss ET in the width direction. As a result, when the lower end of the escalator truss ET is suspended by the lower lifting device 43a, the wire 44a hangs down along the vertical direction.

The two wires 44b extending from the lower lifting device 43b attached to the other lower suspension beam 42b extend vertically from a position above the escalator truss ET and are connected to the connector 22. .. By connecting the wires 44b in an inclined direction in this way, when the wires 44b are wound up by the lower lifting device 43b, a pulling force that moves the escalator truss ET inward in the horizontal direction indicated by the arrow B is applied. Can be done. The moving direction (arrow B) at this time is opposite to the moving direction (arrow A) of the escalator truss ET by the upper lifting device 39b.

In the support frame 30, the intermediate suspension beam 46 is fixed to the intermediate portion between the upper end portion and the lower end portion of the two connecting beams 36. The intermediate suspension beam 46 is also preferably composed of an H-shaped steel material. Both ends of the intermediate suspension beam 46 are fastened to the connecting beam 36 by, for example, bolts and nuts. In the present embodiment, the intermediate suspension beam 46 is arranged substantially at the center of the connecting beam 36 in the longitudinal direction.

It is preferable that the connecting beam 36 is formed with bolt insertion holes for fixing the intermediate suspension beam 46 at intervals in the longitudinal direction. As a result, the fixed position of the intermediate suspension beam 46 can be changed, and the position where the escalator truss ET is suspended can be appropriately changed by the lifting device arranged on the intermediate suspension beam 46.

In the intermediate suspension beam 46, two intermediate lifting devices 47 are arranged at a distance substantially corresponding to the width dimension of the escalator truss ET. For the intermediate lifting device 47, for example, an electric chain block is preferably used. The tip of the wire 48 hanging from the intermediate lifting device 47 is connected to a connector 22 fixed to the upper center of the escalator truss ET. As a result, the support pedestal 30 of the present embodiment can be lifted and lowered by the intermediate lifting device 47 provided on the intermediate suspension beam 46 to lift and lower the intermediate portion of the escalator truss ET. A plurality of intermediate suspension beams 46 may be provided, and intermediate lifting devices 47 may be arranged on each intermediate suspension beam 46. As a result, the hanging position of the escalator truss ET can be appropriately set, and workability may be improved.

Subsequently, the procedure of the lifting method of the escalator truss ET using the support frame 30 will be described. By lifting and lowering the escalator truss ET by this lifting method, it is possible to remove the old escalator and install a new escalator. In the following, first, the work of removing the escalator truss ET will be described, and then the work of newly installing the escalator truss ET will be described.

Before removing the escalator truss ET, remove the moving handrails, balustrades, steps, etc. of the escalator in advance. As a result, the weight of the suspended escalator truss ET can be reduced, and the work can be performed safely and easily. Further, the drive motor, the drive chain, and the like may be removed from the escalator truss ET in advance to further reduce the weight of the escalator truss ET.

The support stand 30 is installed as follows. First, the upper department type pedestal 32 is erected on the upper floor 4 in a state of being supported by the upper building beam H4, and the lower department type pedestal 34 is erected on the lower floor floor 6 in a state of being supported by the lower building beam H5. do. Then, two connecting beams 36 are erected over the upper section type pedestal 32 and the lower section type pedestal 34.

Next, in the two connecting beams 36, the upper suspension beams 38a and 38b are fixed to the upper end portions thereof, and the lower suspension beams 42a and 42b are fixed to the lower end portions thereof. Then, the upper lifting devices 39a and 39b are arranged on the upper suspension beams 38a and 38b, and the lower lifting devices 43a and 43b are arranged on the lower suspension beams 42a and 42b. This prepares the lifting work of the escalator truss ET.

In this state, the wires 40a, 40b, 44a, 44b, 48 of the lifting devices 39a, 39b, 43a, 43b, 47 are connected to the connecting tool 22 fixed to the escalator truss ET, respectively. Then, the lifting devices 39a, 39b, 43a, 43b, 47 are operated to lift the escalator truss ET.

At this time, by increasing the lifting amount by the upper lifting device 39b, the escalator truss ET moves in the direction of arrow A and moves to a position where it does not get caught on the upper floor 4. In this state, the upper lifting devices 39a and 39b are operated in the same manner to suspend the upper end portion ET3 of the escalator truss ET. As a result, the upper end portion ET3 of the escalator truss is suspended downward from the upper floor 4.

After that, the lower lifting devices 43a and 43b and the intermediate lifting device 47 are operated to suspend the escalator truss ET. At this time, the amount of lifting by the lower lifting device 43b is once increased to move the escalator truss ET in the direction of arrow B, and then the lower end portion ET4 of the escalator truss ET is hung. As a result, the lower end portion ET4 of the escalator truss ET can be hung without being caught on the lower floor floor 6.

Then, the lifting devices 39a, 39b, 43a, 43b, 47 are operated to suspend the escalator truss ET to the first floor (not shown). Then, the lower end portion ET4 of the escalator truss ET that has reached the trolley 2 (see FIG. 3) on the first floor first is separated by removing or fusing the bolts and nuts, and is carried out from the building entrance. After that, the hanging work is continuously performed, and the intermediate part ET5 of the escalator truss ET is separated and carried out from the building entrance using the trolley 2. Finally, the upper end portion ET3 of the escalator truss ET is hung on the carriage 2 on the first floor and carried out from the building entrance. In this way, the removal work of the old escalator truss is completed.

The new installation work of the escalator truss ET of the new escalator can be performed in the reverse procedure of the removal work described above. Therefore, the description here will be omitted.

As described above, according to the lifting method of the escalator truss ET of the present embodiment, the lifting work of the escalator truss ET can be performed by the support pedestal 30 supported only by the upper building beam H4 and the lower building beam H5. .. Therefore, the escalator truss ET can be easily removed and newly installed even in a place where a structure capable of supporting the lifting device cannot be secured above, for example, a stairwell.

The lifting method of the escalator truss according to the present invention is not limited to the above-described embodiment and its modifications, and various changes and improvements are made within the scope of the matters described in the claims of the present application. Is possible.

In the above, the other upper suspension beam 38b and the upper lifting device 39b for moving the escalator truss ET in the horizontal direction inward in the arrow A direction are arranged inside the one upper suspension beam 38a and the upper lifting device 39a. The above example has been described, but the present invention is not limited to this. As shown in FIG. 2, the upper end portion 36a of the connecting beam 36 may be provided so as to protrude from the upper section type gantry 32, and the upper suspension beam 38b and the upper lifting device 39a may be arranged on the upper end portion 36a. As a result, a tensile force can be applied to the escalator truss ET on the outside of the escalator truss ET (in the direction of arrow C), and it becomes easier to secure a larger horizontal movement distance in the suspended state of the escalator truss. Workability is improved. Similarly, the lower suspension beam 42b and the lower lifting device 43b may be arranged outside the lower division type gantry 34.

Further, in the above, the support pedestal 30 is provided with two upper suspension beams 38a and 38b and the lower suspension beams 42a and 42b, and the upper lifting devices 39a and 39b are arranged on the upper suspension beams 38a and 38b, respectively. Further, an example in which the lower lifting devices 43a and 43b are arranged on the lower suspension beams 42a and 42b, respectively, has been described, but the present invention is not limited to this. The upper suspension beam 38b and the upper lifting device 39b may be omitted, or the lower suspension beam 42b and the lower lifting device 43b may be omitted.

Further, although the example in which the intermediate suspension beam 46 is provided on the support frame 30 has been described above, the present invention is not limited to this, and the intermediate suspension beam and the intermediate lifting device may be omitted.

2 trolleys, 4 upper floors, 6 lower floors, 10 buildings, 12 atriums, 14 entrances, 16, 18, 24 lifting devices, 20, 26, 40a, 40b, 44a, 44b, 48 wires, 22 connectors , 30 Support pedestal, 32 Upper department type pedestal, 32a, 34a Strut, 32b, 34b Horizontal beam, 34 Lower department type pedestal, 36 Connecting beam, 36a Upper end, 38a, 38b Upper suspension beam, 39a Upper lifting device (1st Upper lifting device), 39b upper lifting device (second upper lifting device), 42a, 42b lower suspension beam, 43a lower lifting device (first lower lifting device), 43b lower lifting device ( 2nd lower lifting device), 46 intermediate lifting beam, 47 intermediate lifting device, ET escalator truss, ET1, ET3 upper end, ET2, ET4 lower end, ET5 middle, H1-H3 building beam, H4 upper building beam , H5 lower building beam.

Claims (5)

An upper section type pedestal supported by the upper building beam is erected, a lower section type pedestal supported by the lower building beam is erected, and at least two are erected over the upper section type pedestal and the lower section type pedestal. Laying the connecting beam of
In the two connecting beams, the upper suspension beam is fixed to the upper end portion thereof, and the lower suspension beam is fixed to the lower end portion thereof.
An upper lifting device is arranged on the upper suspension beam, and a lower lifting device is arranged on the lower suspension beam.
The upper lifting device suspends and supports the upper end of the escalator truss, and the lower lifting device suspends and supports the lower end of the escalator truss.
Lifting and lowering the escalator truss by the upper lifting device and the lower lifting device.
Lifting method of escalator truss. In the escalator truss lifting method according to claim 1,
Two upper suspension beams are provided, and first and second upper lifting devices are arranged in each of the upper suspension beams.
Two lower suspension beams are provided, and first and second lower lifting devices are arranged in each of the lower suspension beams.
The first upper and lower lifting devices can suspend and support the escalator truss in the vertical direction, and the second upper and lower lifting devices can suspend and support the escalator truss in the horizontal direction. Lifting method for escalator trusses that can be used to move. In the escalator truss lifting method according to claim 2,
A method for lifting an escalator truss, wherein at least one of the second upper and lower lifting devices is arranged at a position where a tensile force is applied to the outside of the escalator truss with respect to the escalator truss. In the lifting method for the escalator truss according to any one of claims 1 to 3,
An intermediate suspension beam is fixed to the intermediate portion between the upper end portion and the lower end portion of the connecting beam, and the intermediate suspension beam is fixed.
An intermediate lifting device is placed on the intermediate suspension beam,
A method for lifting an escalator truss, in which an intermediate portion of the escalator truss is lifted and lowered by the intermediate lifting device. In the lifting method of the escalator truss according to claim 4,
The intermediate suspension beam is a lifting method for an escalator truss, which is configured so that a fixed position can be changed with respect to the extending direction of the two connecting beams.

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