JP2020179977A - Work step for passenger conveyor and work method using the work step - Google Patents

Abstract

To provide a work step that can be safely carried in such a state that a lifting device is assembled on a passenger conveyor and a work method using the work step.SOLUTION: A work step 7a used by exchanging it with a passenger step 7 of an escalator 1 includes a tread 21 having an integrally formed projection parts 24 to which leg parts 31a, 31b of a portal lifting device 30 can be inserted to be fixed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a work step of a passenger conveyor and a work method using the work step.

Conventionally, as disclosed in Patent Document 1, a gantry-type lifting device for transporting a heavy object on stairs is known. This gantry lifting device is equipped with legs that horizontally support the beam across the upper and lower steps of the stairs, a slider that can be moved in the longitudinal direction of the beam, and a chain block suspended from the beam via the slider. ing. According to the gantry-type lifting device configured in this way, heavy objects existing between the legs can be transported by the slider and the chain block.

Japanese Unexamined Patent Publication No. 2015-83511

By the way, one of the maintenance work of passenger conveyors such as escalators is the replacement of parts in the truss. If a lifting device as in Patent Document 1 can be used when replacing heavy parts, work efficiency will be improved. Escalators can be several tens of meters long, and it is not easy to assemble a lifting device by transporting members to a work site on the slope. Therefore, it is desired that the lifting device can be assembled on the lower floor side and transported to the work place.

However, the lifting device disclosed in Patent Document 1 is not fixed only because the legs are placed on the stairs, and the lifting device is assembled on the step of the escalator, and the work place is safe. Could not be moved to.

The present invention has been made to solve the above-mentioned problems, and provides a work step capable of safely transporting a lifting device assembled on a passenger conveyor and a work method using the work step. With the goal.

In order to achieve the above object, the work step according to the present invention is a work step used in place of the passenger step of the passenger conveyor, and is a protrusion that can be fixed by inserting the leg of the lifting device. It is equipped with a tread plate that is integrated with. It is preferable that the protrusion has a hole and can be fastened to the leg of the lifting device by a fixing tool inserted into the hole. Further, it is preferable that the protrusion is welded or integrally molded with the tread plate.

Further, in order to achieve the above object, the work method using the work step according to the present invention includes a step removal step of removing a plurality of passenger steps of the passenger conveyor and one of the removed passenger steps. , Replace with the first work step having a tread plate with integrated protrusions, and replace the other one of the removed passenger steps with a second work step having a tread plate with integrated protrusions. In the step replacement step to be replaced, one leg of the portal lifting device is inserted and fixed to the protrusion of the first work step, and the portal lifting device is fixed to the protrusion of the second work step. The leg insertion step of inserting and fixing the other leg, and the portal lifting device assembled in the first work step and the second work step by driving the passenger conveyor are used as work places. It is equipped with a transportation process for transporting to.

According to the present invention, the legs of the lifting device can be inserted into and fixed to the protrusions of the work step. Therefore, with the lifting device assembled, the passenger conveyor can be driven and safely transported to the work place. As a result, the work efficiency of maintenance work can be improved.

It is a side view which shows the escalator which concerns on Embodiment 1 of this invention. It is a perspective view which shows the work step which concerns on Embodiment 1 of this invention. It is a side view which shows the state which the work step and the gate type lifting device were installed in the escalator of FIG. It is a front view which shows the state which one leg part of the gate type lifting device is installed in the work step on the lower floor side of the escalator of FIG. It is a top view which shows the state which the work step and the gantry lifting device were installed in the escalator of FIG. It is a figure for demonstrating the operation which detects the lift of a passenger step by a step abnormality running detection device. It is a figure for demonstrating the structure of the work step which always operates a step abnormality running detection apparatus. It is a figure for demonstrating the structure of the work step which always operates a step subsidence detection device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, when the number, quantity, quantity, range, etc. of each element is referred to in the embodiment shown below, the reference is made unless otherwise specified or clearly specified by the number in principle. The present invention is not limited to the number of the inventions. In addition, the structures and the like described in the embodiments shown below are not necessarily essential to the present invention unless otherwise specified or clearly specified in principle. The elements common to each figure are designated by the same reference numerals, and duplicate description will be omitted.

Embodiment 1.
(Passenger conveyor)
First, a configuration of a passenger conveyor to which the work step according to the first embodiment of the present invention is applied will be described.

FIG. 1 is a side view showing an escalator according to a first embodiment of the present invention. Here, the escalator 1 will be described as an example of the passenger conveyor, but it may be a moving walkway or the like.

Each component of the escalator 1 is assembled to a main frame called a truss 2. A step chain 5 is wound between the upper sprocket 3 and the lower sprocket 4 arranged at the upper and lower parts of the truss 2. By driving the step chain 5 with the drive unit 6, the passenger steps 7 coupled to the step chain 5 at equal intervals move in a circular manner.

Drive rollers and follow-up rollers are provided on both side surfaces of the passenger step 7, and the trajectory and posture of the passenger step 7 are controlled by guiding them with drive rails and follow-up rails, respectively. Above the truss 2, a balustrade device 8 extending in the longitudinal direction of the truss 2 is provided. The balustrade device 8 is provided with a moving handrail 9 that circulates and moves between the entrances and exits.

The escalator 1 can be divided into five sections: a lower horizontal portion A, a lower curved portion B, an intermediate inclined portion C, an upper curved portion D, and an upper horizontal portion E. The escalator 1 shown in FIG. 1 is an intermediate drive type escalator in which the drive unit 6 is provided on the intermediate inclined portion C. A plurality of drive units 6 may be provided.

(Working step and lifting device)
Next, a work step used in place of a part of the passenger step 7 in the maintenance work of the escalator 1 of FIG. 1 will be described.

FIG. 2 is a perspective view showing a working step 7a according to the first embodiment of the present invention. The work step 7a includes a tread plate 21, a riser 22, and a bracket 23. A protrusion 24 that can be fixed by inserting the legs 31a and 31b of the gate-type lifting device 30 shown in FIG. 3 to be described later is welded or integrally formed on the tread plate 21. The protrusion 24 has a hole 25 penetrating parallel to the tread plate 21. The bracket 23 fixes the tread plate 21 and the riser 22. The bracket 23 is connected to the step chain 5 via the step shaft 26. The drive roller 27 is attached to the step shaft 26. The follow-up roller 28 is attached to the lower end of the bracket 23.

Next, the working step 7a attached to the escalator 1 and the lifting device fixed to the working step 7a will be described with reference to FIGS. 3 to 5.

FIG. 3 is a side view showing a state in which the work step 7a and the gantry lifting device 30 are installed on the escalator 1. FIG. 4 is a front view showing a state in which one leg of the gantry lifting device 30 is installed on the work step 7a on the lower floor side of the escalator 1. FIG. 5 is a top view showing a state in which the work step 7a and the gantry lifting device 30 are installed on the escalator 1.

As shown in FIG. 3, during the maintenance work of the escalator 1, the plurality of passenger steps 7 of the escalator 1 are removed, and the work steps 7a are attached to the upper floor side and the lower floor side, respectively. As shown in FIG. 3, a passenger step 7 may be attached between the work step 7a on the upper floor side and the work step 7a on the lower floor side. The passenger step 7 can be used as a shelf and a workbench on which the replacement part 6b is placed.

A gantry lifting device 30 for transporting a heavy object is installed on the work step 7a. The gantry lifting device 30 includes legs 31a and 31b that horizontally support the rail 32 over the work step 7a on the upper floor side and the work step 7a on the lower floor side. The rail 32 is supported by the legs 31a and 31b and guides the trolley 33 in the longitudinal direction. The trolley 33 includes a chain block 34. According to the portal type lifting device 30 configured in this way, heavy objects existing between the legs 31a and 31b can be transported by the trolley 33 and the chain block 34. As an example, the heavy object is a replacement part 6a (for example, a motor) in the drive unit 6.

As shown in FIG. 4, the columnar protrusion 24 of the working step 7a is fitted into the opening formed at the lower end of the leg 31a of the portal lifting device 30. Further, the protrusion 24 is fastened to the leg of the gantry lifting device 30 by a fixing tool 40 inserted into the hole 25. The fastener 40 is, for example, a bolt and a nut. The support beam 35a is attached parallel to the upper ends of the two legs 31a.

Note that FIG. 4 shows a configuration in which one leg of the gate-type lifting device 30 is installed in the work step 7a on the lower floor side, but the gate-type lifting device 30 is installed in the work step 7a on the upper floor side. The same applies to the configuration in which the other leg portion 31b (FIG. 3) of the heavy device 30 is installed.

As shown in FIG. 5, the rail 32 is supported by the legs 31a and 31b via the support beams 35a and 35b.

(Safety device)
When operating the escalator 1 with the work step 7a attached, it is necessary to prevent the protrusion 24 of the work step 7a from coming into contact with the comb installed at the entrance / exit.

Therefore, in the present embodiment, when the work step 7a reaches the lower curved portion B connecting the intermediate inclined portion C and the lower horizontal portion A of the escalator 1, or when the intermediate inclined portion C and the upper horizontal portion E are connected. When the upper curved portion D to be connected is reached, the safety device for stopping the escalator 1 is always activated.

As a safety device, a step abnormality running detection device and a step subsidence detection device can be used.

First, a case where the step abnormality traveling detection device 60 is used will be described with reference to FIGS. 6 and 7. The step abnormality traveling detection device 60 is also called a curved rail switch (CRS).

FIG. 6 is a diagram for explaining an operation of detecting the lift of the passenger step 7 by the step abnormality traveling detection device 60. The step abnormality traveling detection device 60 detects when a shoe tip or the like bites between the steps in the lower curved portion B or the upper curved portion D where the step of the adjacent step becomes small, and immediately stops the escalator 1. It is a safety device. If the shoe tip or the like bites between the steps, the step reduction operation is locked, so that the step on the upper step side rises. That is, the follow-up roller 61 of the passenger step 7 floats up from the follow-up rail 62. When the raised follow-up roller 61 lifts the operation rail 63, which is an operation piece, the sensor 64 detects the contact, and the control device 65 stops the drive unit 6.

Utilizing such a configuration of the step abnormality traveling detection device 60, the work step 7a according to the first embodiment of the present invention always has a step abnormality when the step reaches the lower curved portion B and the upper curved portion D. The travel detection device 60 is operated. This will be described with reference to FIG.

FIG. 7 is a diagram for explaining the configuration of the work step 7a that always operates the step abnormality traveling detection device 60. As shown in FIGS. 2 and 7, the working step 7a is for passengers so that it always contacts the operating rail 63 when it reaches the lower curved portion B or the upper curved portion D where the step of the adjacent step becomes smaller. A follow-up roller 28 having a diameter larger than that of the follow-up roller 61 in step 7 is provided. Specifically, the diameter of the following roller 28 is larger than the distance from the following rail 62 to the operating rail 63. According to this, when the work step 7a reaches the lower curved portion B or the upper curved portion D, the step abnormality traveling detection device 60 always operates regardless of the presence or absence of the step abnormality, and the escalator 1 is stopped. Can be done.

Next, a case where the step subsidence detection device 80 is used will be described with reference to FIG. The step subsidence detection device 80 is also called a step roller switch (SRS). The step subsidence detection device 80 is a safety device for detecting the subsidence of a step due to the falling of the following roller or the like and immediately stopping the escalator 1. The step subsidence detection device 80 can be used together with or in place of the step abnormality travel detection device 60 described above.

FIG. 8 is a diagram for explaining the configuration of the work step 7a that always operates the step subsidence detection device 80. The step subsidence detection device 80 includes an actuating piece 81 that comes into contact with the lower end of the bracket of the passenger step 7 when the passenger step 7 sinks in the lower curved portion B or the upper curved portion D. The control device 65 detects the contact between the lower end of the bracket and the working piece 81 and stops the drive unit 6.

In the working step 7a according to the present embodiment, as shown in FIGS. 2 and 8, the lower end of the bracket is extended so that the lower end of the bracket always comes into contact with the operating piece 81 when reaching the lower bending portion B or the upper bending portion D. The extension portion 23a is provided. That is, in the passenger step 7, the lower end of the bracket does not come into contact with the operating piece 81 unless the following roller falls off, but the working step 7a includes an extension portion 23a in which the lower end of the bracket is extended, so that the following roller is provided. The extension portion 23a is configured to come into contact with the operating piece 81 whenever the step passes, regardless of whether or not the step has fallen off. Therefore, when the work step 7a reaches the lower curved portion B or the upper curved portion D, the step subsidence detection device 80 always operates and the escalator 1 can be stopped.

(Maintenance work method)
Next, a maintenance work method for the escalator 1 using the above-mentioned work step 7a will be described.
This maintenance work method includes a step removal process, a step replacement process, a lifting device assembly process, a lifting device transporting process to a work place, a parts replacement process, and a lifting device transporting process to a lower floor. Through these steps, the gate-type lifting device 30 erected on the lower floor side can be safely transported to the work place, and the gate-type lifting device 30 can be transported to the lower floor side after the maintenance work.

First, in the step removal step, the worker removes a plurality of passenger steps 7 of the escalator 1 which is a passenger conveyor. In order to reduce the work cost, the step removal process is performed on the lower floor side.

Next, in the step replacement step, the worker replaces one of the removed passenger steps 7 with a first work step having a tread plate 21 with an integrated protrusion 24. Further, the worker replaces the other one of the removed passenger steps 7 with a second work step having a tread plate 21 with an integrated protrusion 24. In the example shown in FIG. 3, the first work step 7a is the work step 7a on the lower floor side, and the second work step 7a is the work step 7a on the upper floor side. In order to reduce the work cost, the step exchange process is performed on the lower floor side.

Next, in the lifting device assembling step, the worker assembles the portal type lifting device 30 between the work step 7a on the lower floor side and the work step 7a on the upper floor side. The lifting device assembly process is performed on the lower floor side. The lifting device assembly process will be described separately for the leg insertion process, the fastening process, and the lifting machine installation process.

In the leg insertion step, the worker inserts and fixes one leg 31a of the portal lifting device 30 into the protrusion 24 of the work step 7a on the lower floor side. Further, the worker inserts and fixes the other leg portion 31b of the portal type lifting device 30 into the protrusion 24 of the work step 7a on the upper floor side.

In the fastening process, the worker inserts one leg 31a of the portal lifting device 30 into the protrusion 24 of the work step 7a on the lower floor side, and then inserts it into the hole 25 of the work step 7a on the lower floor side. The protrusion 24 and the leg portion 31a of the gantry lifting device 30 are fastened by the fixing tool 40 to be inserted. Further, the worker inserts the other leg portion 31b of the gantry lifting device 30 into the protrusion 24 of the work step 7a on the upper floor side, and then inserts it into the hole 25 of the work step 7a on the upper floor side. The protrusion 24 and the leg portion 31b of the gantry lifting device 30 are fastened by the fixing tool 40.

In the lifting machine installation process, the worker attaches the rail 32, the trolley 33, and the chain block 34 to complete the portal type lifting device 30.

Next, in the process of transporting the lifting device to the work place, the worker drives the escalator 1 and assembles the gate-type lifting device in the work step 7a on the lower floor side and the work step 7a on the upper floor side. 30 is transported to the work place on the intermediate inclined portion C. At this time, by using the passenger step 7 between the legs 31a and 31b as a shelf for transporting the replacement part 6b as shown in FIG. 3, the labor required for transporting the replacement part 6b can be reduced. ..

Next, in the parts replacement step, the worker uses the trolley 33 and the chain block 34 to replace the existing replacement parts 6a shown in FIG. 3 with new replacement parts 6b. The existing replacement part 6a taken out is placed in the passenger step 7 between the legs 31a and 31b.

Next, in the process of transporting the lifting device to the lower floor, the worker drives the escalator 1 to transport the portal type lifting device from the work place to the lower floor side. The step of transporting the lifting device to the lower floor includes a step of stopping the escalator 1 by the above-mentioned safety device. In the stop process, when the work step 7a on the lower floor reaches the lower curved portion B connecting the intermediate inclined portion C and the lower horizontal portion A of the escalator 1, the safety device is activated to ensure that the escalator 1 is operated. Stop it. After the escalator 1 is stopped, the worker removes the gantry lifting device 30 and the working step 7a and attaches the passenger step 7.

As described above, according to the maintenance work method of the escalator 1 using the work step 7a according to the present embodiment, the legs 31a and 31b of the portal lifting device 30 are attached to the protrusions 24 of the work step 7a. Can be inserted and fastened. Therefore, with the gantry lifting device 30 assembled on the lower floor side, the escalator 1 can be driven and safely transported to the work place. Further, along with the gantry lifting device 30, a new replacement part 6b, which is a heavy object, can be transported to the work place. Even after the maintenance work inside the truss 2, the gantry lifting device 30 and the existing replacement part 6a can be safely transported to the lower floor. As a result, the work efficiency of maintenance work can be improved.

(Modification example)
In the first embodiment described above, as shown in FIGS. 4 and 5, the legs of the gantry lifting device 30 are composed of two columns, but the present invention is not limited thereto. The legs may consist of one or more struts.

Further, in the above-described first embodiment, as shown in FIG. 3, the passenger step 7 between the legs 31a and 31b is used as a shelf for transporting the replacement part 6b, but the present invention is limited to this. is not. The rail 32 may be extended to the lower floor side, and the passenger step 7 on the lower floor side of the work step 7a may be used as a shelf for transporting the replacement part 6b.

Further, in the first embodiment described above, the parts of the drive unit 6 are replaced, but the present invention is not limited to this. The replacement part may be a part in the truss 2 of the escalator 1.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be variously modified and implemented without departing from the spirit of the present invention.

1 Escalator 2 Truss 3 Upper sprocket 4 Lower sprocket 5 Step chain 6 Drive unit 6a Existing replacement part 6b New replacement part 7 Passenger step 7a Work step 8 Railing device 9 Moving rail 21 Step plate 22 Riser 23 Bracket 23a Extension 24 Part 25 Hole 26 Step shaft 27 Drive roller 28 Following roller 30 Gate type lifting device 31a, 31b Leg 32 Rail 33 Trolley 34 Chain block 35a, 35b Support beam 40 Fixing tool 60 Step abnormal running detection device 61 Following roller 62 Following rail 63 Operating rail 64 Sensor 65 Control device 80 Step sinking detection device 81 Operating piece A Lower horizontal part B Lower bending part C Intermediate inclined part D Upper bending part E Upper horizontal part

Claims (11)

A work step that is used in exchange for a passenger step on a passenger conveyor.
Provide a tread plate with integrated protrusions that can be fixed by inserting the legs of the lifting device.
A work step characterized by. The protrusion has a hole and can be fastened to the leg of the lifting device by a fixing tool inserted into the hole.
The work step according to claim 1. The protrusion must be welded or integrally molded with the tread.
The working step according to claim 1 or 2. The passenger conveyor is an escalator and
In the work step, when the curved portion connecting the inclined portion and the horizontal portion of the escalator is reached, the safety device for stopping the escalator must be activated.
The work step according to any one of claims 1 to 3. The safety device includes an operating piece that comes into contact with the following roller when the following roller of the passenger step is lifted at the curved portion, and detects contact between the following roller and the operating piece to stop the escalator. Let me
The working step is provided with a following roller having a diameter larger than that of the following passenger step so that the working step always comes into contact with the operating piece when the curved portion is reached.
The work step according to claim 4. The safety device includes an operating piece that comes into contact with the lower end of the bracket of the passenger step when the passenger step sinks in the curved portion, and detects contact between the lower end and the operating piece to detect the contact between the lower end and the operating piece. Stop the escalator and
The working step includes an extension with an extended lower end of the bracket so that it always comes into contact with the working piece when it reaches the bend.
The working step according to claim 4 or 5. Step removal process to remove multiple passenger steps on the passenger conveyor,
One of the removed passenger steps is replaced with a first working step having a tread with integrated protrusions, and the other one of the removed passenger steps is integrated with the protrusions. A step replacement process for replacing the step with a second work step that has a broken tread,
One leg of the gantry lifting device is inserted into the protrusion of the first work step and fixed, and the other leg of the gantry lifting device is inserted into the protrusion of the second work step. And the leg insertion process to fix
A transportation step of driving the passenger conveyor to transport the gantry lifting device assembled in the first work step and the second work step to a work place, and
A work method characterized by being provided with. The protrusion of the first working step has a first hole.
The protrusion of the second working step has a second hole.
After inserting one leg of the gantry lifting device into the protrusion of the first working step, the protrusion and the leg of the gantry lifting device are provided by a fixing tool inserted into the first hole. After fastening the portions and inserting the other leg portion of the gantry lifting device into the protrusion portion of the second working step, the protrusion portion and the gate are provided by a fixing tool inserted into the second hole. The fastening process for fastening the legs of the mold lifting device and
7. The work method according to claim 7, further comprising. The passenger conveyor is an escalator and
A stop step of always stopping the escalator by a safety device when the first work step or the second work step reaches a curved portion connecting the inclined portion and the horizontal portion of the escalator.
The work method according to claim 7 or 8, wherein the method is provided. The safety device includes an operating piece that comes into contact with the following roller when the following roller of the passenger step is lifted at the curved portion.
The first work step and the second work step are provided with a follow roller having a diameter larger than that of the follow roller of the passenger step so that the operating piece always comes into contact with the operating piece when the curved portion is reached.
In the stop step, the safety device stops the escalator by detecting contact between the follower roller of the first work step or the second work step and the working piece.
9. The working method according to claim 9. The safety device includes an actuating piece that contacts the lower end of the bracket of the passenger step when the passenger step sinks in the bend.
The first working step and the second working step include an extension portion in which the lower end of the bracket is extended so that the operating piece is always in contact with the operating piece when the curved portion is reached.
In the stopping step, the safety device detects contact between the extension portion and the working piece to stop the escalator.
The working method according to claim 9 or 10.

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