JP6974991B2 - Transport system - Google Patents

Description

The present invention relates to a transport system for transporting materials and workers between the work room and the ground via a transport passage formed by connecting the underground work room and the ground.

The pneumatic caisson method is known as a method for constructing underground structures such as bridges, building foundations, and shafts for shield tunnels. In the pneumatic caisson method, a reinforced concrete box (caisson) is constructed on the ground, an airtight work room is provided at the bottom of the caisson, and compressed air corresponding to the groundwater pressure is sent into this work room to send groundwater to the work room. It is designed to prevent the invasion of. Then, in a pressure state higher than the atmospheric pressure, the ground of the floor of the work room is excavated, and the caisson is submerged in the ground while carrying out the excavated earth and sand to the ground, so that the foundation of bridges and buildings, etc. It is a construction method to construct the underground structure of.

In such a pneumatic caisson method, an excavator such as a power shovel is carried into the work room, and the excavator is remotely controlled from the ground to excavate the floor of the work room (for example, Patent Document 1). See). Then, a material shaft and a material lock for carrying out the bucket containing the earth and sand excavated by the excavator to the ground, and a man shaft for workers to enter the work room for maintenance of the excavator and the like. In general, Maen-Roch and the excavator are installed side by side in the caisson independently.

In recent years, construction work to construct underground structures using the pneumatic caisson method has been increasing in narrow lands and lands close to existing structures. In such construction, the excavation bottom area is small and the cross-sectional area of the caisson is also small, so that it is physically impossible to arrange the material shaft and the man shaft side by side in the caisson as in the conventional case. Therefore, there is also known a pneumatic caisson method in which a single shaft that combines the functions of a material shaft, a material lock, a man shaft, and a man lock is erected on a caisson (see, for example, Patent Document 2). In such a pneumatic caisson method, the depth of construction of underground structures has become deeper in recent years, and the depth has been increasing. As the depth of the caisson increases, the time limit for workers to stay in the work room under high pressure and work becomes stricter. Therefore, in order to reduce the burden on the worker when going back and forth between the ground and the work room, there is also one equipped with a worker transport device for transporting the worker between the work room and the ground.

JP-A-2015-108244 Japanese Patent No. 3908747

In the above-mentioned pneumatic caisson method or the like, when material transfer (excavator or earth and sand transfer) and worker transfer are performed via one shaft (transport passage), the conventional worker transfer device works. Since the crew boarding cage is always suspended above the upper end of the shaft, it was necessary to remove the worker transport device when transporting the material. Further, when the worker is transported, it is necessary to install the worker transport device again, which causes a problem that the work efficiency is poor.

The present invention has been made in view of such a problem, and it is intended to provide a transport system capable of transporting materials with a worker transport device installed and improving work efficiency. The purpose.

To achieve the above object, the transport system according to the present invention, a working chamber and a ground basement has a tether cylindrical shape, the transport path for carry away the drilled in the work chamber sediment on the ground material A man having a shaft (for example, a material shaft 21 in the embodiment) and a cylindrical shape concentrically arranged around the material shaft, which serves as a passage for workers to enter and exit the work room. In a pair shaft having an integrated double pipe structure (for example, the pair shaft 20 in the embodiment) with the shaft (for example, the man shaft 22 in the embodiment), between the work room and the ground via the material shaft. It is a transport system that transports materials and workers in the above. Then, the worker boarding cage (for example, the cage 120 in the embodiment) for carrying the worker is suspended by the cage transport rope (for example, the transport rope 135 in the embodiment), and the cage transport rope is suspended. by taking feed and run a lift between the operator boarding cage, and the upper upper end of the material shaft, and a position where the communication opening is provided in the lower of the material shaft leading into the man shaft It has a worker transport device to move. Then, in the worker transport device, the support frame portion (for example, the support arm 115 of the device frame 110 in the embodiment) that suspends and supports the worker boarding cage with the cage transport rope is the upper end portion of the material shaft. to open the transport work position for moving hanging the operator boarding cage in the material shaft located above the upper space of the material shaft upper portion above the material shaft away laterally from the It is configured to be movable to the transport / retract position.

In the transport system having the above configuration, the material transport container for transporting the material (for example, the earth bucket 31 in the embodiment) is suspended by the material transport rope, and the material transport rope is unwound and wound to transport the material. material transfer device vertically moving the container within the material shaft (e.g., a crane device 32 in the embodiment) has, the material transport container with the material conveying device when vertically moving within the material shaft, the It is preferable that the support frame portion is configured to move to the transport / retract position.

In the transport system having the above configuration, it is preferable that the support frame portion is configured to be swingable in the vertical direction, and the support frame portion is swinging upward to move to the transport retract position.

In the transport system having the above configuration, it is preferable that the cage transport rope is configured to have two transport ropes and one safety rope.

According to the present invention, the supporting frame portions of the personnel transport device, movable in from above the upper end portion of the material shaft conveyance retracted position to open the upper space of the material shaft away laterally. Therefore, when the material transfer work is performed via the material shaft , the support frame portion can be moved to the transfer / retract position. As a result, the material transfer work can be performed without interfering between the transported object (material transport container), the support frame portion of the worker transport device, and the worker boarding cage. Therefore, during the material transfer work, the material transfer work can be performed while the worker transfer device is installed on the work table without removing the worker transfer device from the work table provided at the upper end of the material shaft. Efficiency can be improved.

In the present invention, it is preferable that the support frame portion of the worker transport device is configured to be swingable in the vertical direction, and the support frame portion is swinging upward to move to the transport / retract position. With such a configuration, the worker boarding cage can be held in the space on the work table without protruding from the work table. When the worker boarding cage protrudes outward from the work table, the worker boarding cage interferes (contacts) with other equipment, or the worker boarding cage interferes with other work. Therefore, it is preferable that the worker boarding cage is held in the space on the work table.

In the present invention, it is preferable that the cage transport rope of the worker transport device is configured to include two transport ropes and one safety rope. With such a configuration, it is possible to provide double and triple safety measures to prevent the worker's boarding cage from falling.

It is a vertical sectional view which shows the main equipment of the pneumatic caisson method. It is a vertical sectional view which shows the excavation equipment and the equipment equipment in the said main equipment. It is a front view which shows the worker transporting apparatus which concerns on this invention. It is a top view which shows the said worker transfer apparatus. It is a side view which shows the said worker transporting apparatus. It is a figure which shows the cage in the said worker transporting apparatus, (a) is a plan view, (b) is a front view. It is a figure which shows the said cage, (a) is the front view with the cage door open, and (b) is the sectional view at the position of arrow BB in FIG. It is a side view (partial cross section) which shows the guide member provided in the said cage. It is a front view which shows the state which the support arm in the said worker transporting apparatus is swung upward.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the main equipment of the pneumatic caisson method to which the transfer system according to the present invention is applied will be described with reference to FIGS. 1 and 2. The pneumatic caisson method uses excavation equipment E1, equipment equipment E2, soil removal equipment E3, air supply equipment E4, and reserve / safety equipment E5 to submerge the reinforced concrete caisson 1 underground. It is configured to build a structure.

The excavation equipment E1 includes an excavator 10 (hereinafter referred to as a caisson excavator 10) installed in a work room 2 provided at the bottom of the caisson 1 and a remote control device 12 for remotely controlling the operation of the caisson excavator 10 from the ground. It is configured to have a ground remote control room 13 provided with the above. The excavation equipment E1 operates by receiving electric power from a power generation device (not shown). The electric power from this power generation device is also supplied to the equipment equipment E2, the soil removal equipment E3, and the air supply equipment E4.

The mounting equipment E2 has a pair shaft 20 having a double pipe structure in which a cylindrical material shaft 21 and a cylindrical man shaft 22 arranged concentrically around the material shaft 21 are integrated. It is composed. The material shaft 21 is erected in the caisson 1 so as to connect the ground and the work room 2, and forms a transport passage in the work room 2 for carrying the earth bucket 31 loaded with earth and sand by the application shovel 10 to the ground. ing. In the material shaft 21, a material shaft bottom door 21a, a material lock lower door 21b, and a material lock upper door 21c are provided in this order from the work room 2 side (lower side). The closed space formed in the material shaft 21 with the lower door 21b and the upper door 21c closed serves as a material lock 23 (airlock) that suppresses the decrease in air pressure in the work room 2 and allows the earth bucket 31 to pass through. Function.

The man shaft 22 is erected on the caisson 1 so as to surround the material shaft 21, and forms a passage for workers to enter and exit the work room 2. In the man shaft 22, a man shaft bottom door 22a, a man lock lower door 22b, and a man lock upper door 22c are provided in order from the work room 2 side (lower side). The closed space formed in the man shaft 22 with the lower door 22b and the upper door 22c closed functions as a man lock 24 (airlock) that suppresses the decrease in air pressure in the work room 2 and allows workers to pass through. do. The material shaft bottom door 21a, the material lock lower door 21b, the material lock upper door 21c, and the man shaft bottom door 22a are operated by the operation panel provided on the work table 27 provided at the upper end of the pair shaft 20. It is designed to open and close. On the other hand, the lower door 22b of the man lock and the upper door 22c of the man lock are opened and closed by a manual operation by a worker.

A spiral staircase 25 is provided in the man shaft 22 above the man lock upper door 22c. A vertical ramp 26 is provided in the man shaft 22 below the man lock upper door 22c. Workers can move back and forth between the ground and the work room 2 using a spiral staircase 25 and a vertical ramp 26.

The soil removal equipment E3 includes an earth bucket 31 in which the earth and sand excavated by the cason excavator 10 is loaded in the work room 2, and a crane device 32 (note that the earth bucket 31 is lifted to the ground through the material shaft 21 and carried out). , FIG. 1 shows a crane vehicle, which is an example), and has a soil hopper 33 for temporarily storing the earth and sand carried out to the ground by the earth bucket 31 and the crane device 32. It is composed.

The air supply equipment E4 includes an air compressor 42 that sends compressed air into the work room 2 via an air supply path 3 formed in the air supply pipe 41 and the caisson 1, and air that purifies the compressed air sent by the air compressor 42. It has a cleaning device 43 and an air supply pressure adjusting device 44 that adjusts the amount (pressure) of compressed air sent from the air compressor 42 into the working room 2 so that the pressure in the working room 2 is substantially equal to the ground water pressure. It is composed of. An exhaust passage 4 is formed in the caisson 1 in order to circulate the air in the work chamber 2, and the air in the work chamber 2 is appropriately discharged to the ground through the exhaust passage 4. ..

The spare / safety equipment E5 includes an emergency air compressor 51 capable of sending compressed air into the work room 2 in place of the air compressor 42 in the event of a failure or inspection of the air compressor 42, and the above power generation device. Instead, an emergency generator (not shown) capable of supplying power to the excavation equipment E1, the equipment equipment E2, the soil removal equipment E3, and the air supply equipment E4, and the workers who worked in the work room 2 It is configured to have a hospital lock 53 (compressed air chamber) for gradually acclimatizing the worker's body to the atmospheric pressure.

On the work table 27 provided at the upper end of the pair shaft 20, a worker transfer device 100 for transporting the worker to the work room 2 is installed. The worker transfer device 100 will be described below.

As shown in FIGS. 3 to 5, the worker transport device 100 includes a device frame 110 installed on the work table 27, a cage 120 on which workers can board, and two transports attached to the cage 120. The transport winch device 130 capable of winding and feeding the rope 135 and the safety winch device 140 capable of winding and feeding one safety rope 145 attached to the cage 120 are provided. The transport rope 135 and the safety rope 145 are wire ropes having predetermined tensile strengths (for example, a type A wire rope).

The device frame 110 includes a main frame 111 erected on the work table 27 and a support arm 115 pivotally connected to the upper part of the main frame 111 and swingable (undulating) in the vertical direction. NS. A first safety sheave 112 is rotatably provided in the upper and lower middle portions of the main frame 111. A pair of left and right first transport sheaves 113 and a second safety sheave 114 are rotatably provided at the upper end of the main frame 111. The second safety sheave 114 is arranged between the left and right first transport sheaves 113. A transport winch device 130 and a safety winch device 140 are arranged side by side on the bottom of the main frame 111.

The support arm 115 has a pair of left and right arm portions 116 and a bridge portion 117 straddling the tip portions of the left and right arm portions 116, and is formed in a U-shape in a plan view. A pair of left and right second transport sheaves 118 and a third safety sheave 119 are rotatably provided on the bridge portion 117. The third safety sheave 119 is arranged between the left and right second transport sheaves 118. An undulating rope 155 is attached to one of the tips of the left and right arm portions 116. The undulating rope 115 is wound around an undulating sheave 156 provided at the upper end of the main frame 111, and is connected to an undulating winch device 150 provided at the upper and lower intermediate portions of the main frame 111. The undulating winch device 150 is configured to be able to wind and unwind the undulating rope 155 manually by a worker. The support arm 115 is configured to be able to swing (undevelop) in the vertical direction with respect to the main frame 111 by winding and unwinding the undulating rope 155 by the undulating winch device 150.

The transport winch device 130 is an electric winch device, and is configured to rotate two drums together so that the two transport ropes 135 can be wound and unwound together. The transport winch device 130 has an encoder that detects the take-up speed. The two transport ropes 135 extending from the transport winch device 130 are wound in the order of the first transport sheave 113 provided on the main frame 111 and the second transport sheave 118 provided on the support arm 115, respectively. It is attached to the cage 120.

The safety winch device 140 is an electric winch device, and is configured to be able to wind and unwind the safety rope 145 by rotating the drum. The safety rope 145 extending from the safety winch device 140 is wound in the order of the first safety sheave 112 provided on the main frame 111, the second safety sheave 114, and the third safety sheave 119 provided on the support arm 115. It is hung and attached to the cage 120. The safety winch device 140 normally winds up the safety rope 145 so that a tension smaller than the tension of the transport rope 135 unwound by the transport winch device 130 acts on the safety rope 145. It is designed to be fed out.

The device frame 110 is configured to support the two transport ropes 135 and the safety ropes 145 wound as described above and suspend the cage 120 attached to these ropes 135, 145. There is. An upper limit switch 138 is provided at the tip of the support arm 115. When the cage 120 is moved up to the top stop position, the stopper 146 attached to the safety rope 145 pushes up the weight of the upper limit switch 138 to detect that the cage 120 has reached the top stop position, and the transport winch. It is configured to activate the electromagnetic brakes of the device 130 and the safety winch device 140 to stop the ascending movement of the cage 120. An upper final limit switch is provided on the main frame 111 in case the ascending movement of the cage 120 does not stop due to a malfunction of the upper limit switch 138, and the transfer winch device 130 and safety are provided by operating the final limit switch. It is configured to activate the electromagnetic brake of the winch device 140.

As shown in FIGS. 6 and 7, the cage 120 is formed in a cylindrical shape having an outer diameter that can be inserted into the material shaft 21. The peripheral wall portion of the cage 120 is formed by using a mesh-shaped metal plate, and a part of the peripheral wall portion is opened to form a boarding gate 121. The cage 120 has a cage door 122 that can open and close the boarding gate 121. The cage door 122 is
Similar to the peripheral wall portion of the cage 120, it is configured by using a mesh-shaped metal plate, and is provided so as to be slidable along the inside of the peripheral wall portion. The cage door 122 is a sliding door that can be opened and closed manually by a worker. An emergency exit 123 is formed on the ceiling of the cage 120, and an emergency door 124 that can open and close the emergency exit 123 is provided. The emergency door 124 is a double door that opens upward. An emergency ramp 125 is provided in the cage 120 so that the emergency ramp 125 can be climbed up and exit the cage 120 from the emergency exit 123 in an emergency. A hanging metal fitting for fixing the two transport ropes 135 and the safety rope 145 is attached to the ceiling of the cage 120.

A battery-powered lighting fixture and an in-cage operating device are provided in the cage 120. The in-cage operation device includes a power button, an elevating operation lever for moving the cage 120 up and down by the worker transport device 100, and an emergency stop button. The operation signals from these buttons and levers are configured to be transmitted to each drive control unit by wireless communication. A wireless antenna 127 for the wireless communication is provided on the ceiling of the cage 120 (upper surface of the emergency door 124).

Three guide members 128 (slider members) are provided on the ceiling and bottom of the cage 120, respectively. As shown in FIG. 8, the guide member 128 is configured to be able to be held in a state of projecting outward from the peripheral wall portion of the cage 120 (the amount of projecting can be appropriately set). When the cage 120 moves up and down in the material shaft 21, the guide member 128 slides on the inner surface of the material shaft 21 to reduce the rolling of the cage 120 during the up and down movement.

The cage 120 is provided with a cage door limit switch. When the limit switch detects that the cage door 122 is not closed, the operation of the transport winch device 130 and the safety winch device 140 (movement of the cage 120 up and down) is restricted. A lower limit switch is provided on the lower surface of the bottom of the cage 120. When it is detected by the lower limit limit switch that the cage 120 has been moved down to the lowest stop position, the electromagnetic brakes of the transport winch device 130 and the safety winch device 140 are activated to stop the down movement of the cage 120. ing. A lower final limit switch is provided in the cage 120 in case the lower limit switch does not stop the downward movement due to a malfunction of the lower limit switch. By operating the lower final limit switch, the transport winch device 130 and the safety winch device are provided. It is configured to activate 140 electromagnetic brakes.

The worker transport device 100 detects the descending speed of the cage 120 from the encoder of the transport winch device 130, and when the descending speed exceeds 1.2 times the rated speed, the transport winch device 130 and the safety winch It is provided with an automatic fall prevention device that activates the electromagnetic brake of the device 140 to stop the descending movement of the cage 120. Further, the worker transport device 100 detects the load of the cage 120 from the load cell provided in the first transport sheave 113 arranged on the main frame 111, and when the load exceeds the rated load, the worker transport device 100 detects the load. It is equipped with an overload limiting device that regulates the operation of the transport winch device 130 and the safety winch device 140 (movement of the cage 120 up and down).

On the workbench 27, as shown in FIGS. 3 and 4, a circular guide fence 28 connected to the upper end opening of the material shaft 21, a boarding platform 29 for boarding the cage 120, and an upper operating device are provided. And are provided. The guide fence 28 is formed in a tapered shape that gradually spreads upward. The upper operation device is a power button, an elevating operation lever for elevating and moving the cage 120 by the worker transport device 100, and an automatic elevating that automatically elevates the cage 120 to the uppermost stop position (position shown in FIG. 3) on the work table 27. It is equipped with a button, an emergency stop button, various lamps, and the like.

In the worker transport device 100 configured as described above, the support arm 115 is manually operated by manually operating the undulating winch device 150 to swing the support arm 115 of the device frame 110 that suspends and supports the cage 120 downward. The support arm 115 and the cage 120 can be moved to a transfer work position where the tip of the cage 120 is located above the upper end opening of the material shaft 21 and the cage 120 is suspended and moved in the material shaft 21. (State in FIG. 3). Then, the worker gets on the cage 120 and operates the operation device in the cage in the cage 120 or the upper operation device on the work table 27, so that the two transfer ropes 135 are separated by the transfer winch device 130. At the same time as feeding out, the safety rope 145 is fed out by the safety winch device 140, and the cage 120 is moved downward in the material shaft 21. In the present embodiment, the cage 120 is lowered to stop at the lowest stop position, which is a position directly above the material lock upper door 21c in the material shaft 21. A communication port connected to the inside of the man shaft 22 and a door for opening and closing the communication port are provided at the lowest stop position in the material shaft 21, and the worker can enter the man shaft 22 through the communication port. You can enter. Then, the worker can reach the work room 2 through the man lock upper door 22c, the man lock lower door 22b, and the man shaft bottom door 22a by using the vertical ramp 26 in the man shaft 22. There is.

A lower operation device is provided at a position inside the man shaft 22 from the communication port. The lower operating device includes an automatic lowering button that automatically lowers and moves the cage 120 to the lowest stop position in the material shaft 21, and an emergency stop button. At this lowest stop position, a worker gets into the cage 120 and operates the in-cage operating device in the cage 120 or the upper operating device on the workbench 27, so that two transports are carried by the transport winch device 130. The safety rope 135 is wound up, and the safety rope 145 is wound up by the safety winch device 140 to move the cage 120 up in the material shaft 21. Then, the cage 120 is raised to the uppermost stop position on the work table 27 and stopped, so that the worker can get out of the cage 120 and reach the work table 27 on the ground.

In this way, the worker transport device 100 is configured to transport workers between the work table 27 on the ground and the work room 2 in the basement. Therefore, even when the work room 2 is subsided deep underground and the reach to the work room 2 is increased, the worker transport device 100 is used to move back and forth between the ground and the work room 2. The burden on workers can be reduced. Further, since the burden on the worker can be reduced, it is possible to improve the work efficiency in the work room and prevent the anticyclone disorder.

The material shaft 21 is also used as a transport passage for transporting the earth bucket 31 loaded with earth and sand to the ground in the work room 2. Therefore, at the time of such soil removal work, as shown in FIG. 3, when the support arm 115 and the cage 120 of the worker transport device 100 are located above the upper end opening of the material shaft 21, the support arm 115 And the cage 120 interferes with the soil removal work. Therefore, in the worker transport device 100, as shown in FIG. 9, the tip portion of the support arm 115 and the cage 120 are made of a material shaft by manually operating the undulating winch device 150 to swing the support arm 115 upward. The cage 120 is configured to be able to hold the cage 120 in a transport / retracting position where the upper end opening of the 21 is moved away from the upper side to the side to open the upper space. Since the support arm 115 and the cage 120 can be moved from the space above the material shaft 21 in this way, when the material shaft 21 is used as a transfer passage of the earth bucket 31, the earth bucket 31 and the support arm 115 and the cage 120 are used. The soil can be discharged without interfering with. Therefore, the soil removal work can be performed while the worker transport device 100 is installed on the work table 27 without removing the worker transport device 100 from the work table 27 at the time of soil removal work, and the work efficiency can be improved. ..

Although the embodiments of the present invention have been described so far, the scope of the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, by swinging the support arm 115 upward, the support arm 115 and the cage 120 can be moved laterally from above the material shaft 21 to a transport / retracting position that opens the upper space. However, this configuration is an example and is not limited to this configuration. For example, the support arm and the cage may be moved to the transfer / retracting position by turning the support arm in the left-right direction. Alternatively, the support arm and the cage may be moved to the transfer / retracting position by sliding the support arm in the front-rear direction.

In the above-described embodiment, the undulating winch device 150 is configured to swing the support arm 115 up and down by manual operation by an operator, but the undulating winch device 150 is configured to be operated by an electric motor. May be good. In the above-described embodiment, an example in which the worker transfer device 100 is applied to the pneumatic caisson method has been described, but the worker transfer device according to the present invention can be applied to other than the pneumatic caisson method.

1 Caisson 2 Work room 21 Material shaft (transport passage)
27 Worktable 31 Earth bucket (material transfer container)
32 Crane equipment (material transfer equipment)
100 Worker transport device 110 Device frame 115 Support arm (support frame part)
120 cage (worker boarding cage)
135 Transport rope (cage transport rope)

Claims (5)

A pneumatic caisson construction method in which an airtight working room is provided at the bottom of the caisson, the working room is placed in a high pressure state, and the caisson is submerged in the ground while excavating the ground at the bottom of the working room to construct an underground structure. It is a transport system used for
The transport system has a cylindrical shape that connects the ground and the work room, and has a material shaft that serves as a transport passage for carrying out the earth and sand excavated in the work room to the ground, and a material shaft around the material shaft. A pair of shafts having a double-tube structure in which a man shaft having a concentric cylindrical shape and serving as a passage for workers to enter and exit the work room is integrated via the material shaft. the have lines the material transport and personnel transport between the working chamber and the earth,
The operator boarding cage for performing the worker conveying suspended cage transport ropes, by taking the protruding and winding the cage carrying ropes, the operator boarding cage, above the upper end portion of the material shaft And a worker transporting device for moving up and down between the material shaft and the position where the communication port connected to the inside of the man shaft is provided below the material shaft.
In the worker carrying device, the supporting frame unit for supporting hanging the operator boarding cage in the cage transport rope, for the worker riding positioned above the upper portion in the material shaft of the material shaft a transfer operation position for moving suspended cage, transport system and transport the retracted position, is configured to be movable in opening the upper space of the material shaft upper portion the material shaft from above away to the side of the. It has a material lock at the bottom of the material shaft and has a material lock.
It has a man lock at the bottom of the man shaft,
The transfer system according to claim 1, wherein the communication port communicates the upper part of the material lock on the material shaft and the upper part of the man lock on the man shaft. It has a material transfer device for moving the material transfer container up and down in the material shaft by suspending the material transfer container for carrying the material with the material transfer rope and unwinding / winding the material transfer rope.
The transfer system according to claim 1 or 2 , wherein when the material transfer container is moved up and down in the material shaft by using the material transfer device, the support frame portion is moved to the transfer retract position. The transport according to any one of claims 1 to 3, wherein the support frame portion is configured to be swingable in the vertical direction, and the support frame portion is configured to swing upward to move to the transport retract position. system. The transport system according to any one of claims 1 to 4 , wherein in the worker transport device, the cage transport rope includes two transport ropes and one safety rope.

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