JP2023030742A - Lifting device and storage method thereof - Google Patents

Abstract

To provide a storable lifting device and a storage method thereof in a simple and easy configuration securely preventing damage on the lifting device and contact of the lifting device on people when a subsequent bogie moves.SOLUTION: A lifting device 4 provided on a subsequent bogie 1 of a shield tunnel traveling on a rail track 2 in a shield tunnel S comprises: a lifting part 44 in a ladder or a stair way with one end supported on a passage 3 provided on an inner wall surface of the shield tunnel S; guide rollers 43, 43 clamping the lifting part 44 from both sides thereof; and a work floor 41 on which the guide rollers 43, 43 are fixed. The lift part 44 is allowed to freely rotate and slide around the guide rollers 43, 43 as fulcrums and to be stored in the work floor 41.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to lifting equipment used during construction of a shield tunnel and a method for storing the same.

Patent Document 1 discloses a staircase device for ascending and descending to the bottom of a tunnel from a rail-laying steel material spanned over the inner wall surface of an already-constructed shield tunnel, as lifting equipment such as ladders and stairs used in a shield tunnel. is disclosed.
In general, when a shield tunnel is excavated, a plurality of trailing trucks follow as the shield machine advances. The following bogie is equipped with various equipment such as a control panel and a backfill injection plant necessary for excavation, and may be directly towed by the shield machine or may run independently. Due to the recent increase in the cross-section of shield tunnels, the trailing carriages are also becoming larger.

JP-A-2000-291397

In the lifting equipment of Patent Document 1, there is no relative movement deviation between the steel material on which the lifting equipment is spanned and the bottom of the tunnel. Since the trailing carriage moves forward in conjunction with the excavation of the excavator, if the hoisting equipment remains supported by the walkway, the hoisting equipment may tip over and be damaged as the trailing carriage moves. There is a danger that people may get caught in As a result, it is necessary to inspect the following truck before it moves, but there is also the risk of man-made disasters due to human error, such as forgetting or neglecting inspections.
SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems. The object is to propose equipment and its storage method.

The retractable lifting equipment of the present invention for solving the above problems is a lifting equipment provided on a trailing truck of a shield machine running on a track in a shield tunnel, comprising a ladder or stairs, one end of which is the shield The elevating unit comprises an elevating unit supported on a passage provided on the inner wall surface of the tunnel, guide rollers sandwiched from both sides of the elevating unit, and a work floor to which the guide rollers are fixed. is rotatable and slidable about the guide roller as a fulcrum and can be stored in the working floor.
According to such a configuration, the elevating unit is rotatable and slidable about the guide rollers installed on the work floor. It can be stored on the working floor. As a result, the elevator can be easily and reliably separated from the aisle when the following truck moves, so the elevator can be dragged into the passage and damaged as the following truck moves, and people can get caught in the elevator equipment. can avoid the danger of

Further, it is preferable that the work floor is provided with a door portion that restricts movement between the work floor and the passage in a state in which the elevating section is stored in the work floor.
If the work floor is provided with a door that can restrict the lifting and lowering of people by the lifting section, it is possible to restrict the entry and exit of people through the lifting section during work in the following cart, and from the work floor to the aisle while the following cart is moving. Dangerous work such as jumping down from the floor, jumping from the aisle to the work floor, etc. can also be restricted.

In addition, the work floor is provided with a sensor for detecting a state in which the lifting unit is supported on the passage or stored in the work floor. It is preferable that the control unit further includes a control unit that controls traveling of the following truck when the elevator is supported on the passage based on information sensed by the sensor.
A sensor provided on the work floor can sense whether the lifting unit is supported on the passage or stored in the work floor. Since the control unit installed in the seat can control the running of the following truck, it is possible to avoid the risk of man-made disasters due to human error, such as forgetting or neglecting to inspect the following truck before moving.

Moreover, the driver's seat of the following bogie may be provided with a display unit for notifying the state of the lifting unit.
Since the state of the lifting section sensed by the sensor can be displayed in the driver's seat of the following truck, the risk of the following truck traveling with the lifting section supported on the aisle can be suppressed.

Further, when the lifting unit is slid and/or rotated to be supported on the passage while the trailing truck is traveling, the trailing truck may be stopped by a command from the control unit.
While the following truck is running, the following truck can be automatically stopped in an emergency by the command of the control part based on the information detected by the sensor by moving the lifting part, and unsafe behavior can be prevented.

Further, a method for storing the lifting equipment according to the present invention for solving the above-mentioned problems is a method for storing the lifting equipment, wherein one end of the lifting part supported on the passage is lifted and rotated toward the work floor. and the lifting section is stored on the work floor while being slid.
Since the lifting section can rotate and slide about the guide rollers installed on the working floor, it can be stored on the working floor. As a result, the elevator can be easily and reliably separated from the aisle when the following truck moves, so the elevator equipment may be dragged into the passage and damaged, or a person may be caught in the elevator equipment as the following truck moves. can avoid the danger of

According to the lifting equipment and the method for storing the lifting equipment of the present invention, it is possible to reliably prevent damage to the lifting equipment and contact of the lifting equipment with people when the following cart moves.

FIG. 3 is a cross-sectional view of a trailing truck in a shield tunnel including lifting equipment that is an embodiment of the invention; It is a side view of the lifting equipment which is an embodiment of the present invention. FIG. 2(a) is a plan view (as viewed from arrow AA in FIG. 2), and (b) is a front view (as viewed from arrow BB in FIG. 2) of a lifting facility that is an embodiment of the present invention. FIG. 2 is a front view (as seen by arrows BB in FIG. 2) of a state in which the door portion according to the embodiment of the present invention is closed; 4A is a side view (part C in FIG. 4) and (a) is a front view (as viewed by arrows DD in FIG. 5A) of the guide rollers and sensors of the lifting equipment according to the embodiment of the present invention. FIG.

Embodiments of the present invention will be described below with reference to the drawings.
<Overall composition>
FIG. 1 shows a cross-sectional view of a trailing truck in a shield tunnel including lifting equipment that is an embodiment of the present invention.
As shown in FIG. 1, the lifting equipment 4 in the present embodiment follows a shield machine (not shown) in a shield tunnel S constructed on the ground G, and accompanies a trailing truck 1 that runs independently. ing. The trailing carriage 1 is provided with a frame portion 11 formed by assembling a plurality of steel materials in a lattice shape, leg portions 12, 12, 12 . from the traveling parts 13, 13, 13 . Become. The following carriage 1 moves by running on a track 2 provided with running portions 13, 13, 13, . . .
The shield tunnel S is provided with a passageway 3 along its lateral inner surface, and is used as a safety passageway for personnel such as construction workers (hereinafter abbreviated as "workers, etc.").

<Entire lifting equipment>
In FIG. 2, the side view of the lifting equipment which is embodiment of this invention is shown. Further, FIG. 3 shows (a) a plan view (as viewed from arrow AA in FIG. 2) and (b) a front view (as viewed from arrow BB in FIG. 2) of the lifting equipment that is an embodiment of the present invention.
2 and 3, the passage 3 consists of brackets 31, 31, 31, . Scaffolding boards 32, 32, . . . A passage handrail 33 is erected at the end of the upper surface of the bracket 31 on the inner side of the shield tunnel S. As shown in FIG. A worker or the like M can safely pass through the shield tunnel S by using the space sandwiched between the passage handrail 33 and the wall surface of the shield tunnel S as a passage.

The lifting equipment 4 of the present embodiment is mainly placed and supported on a work floor 41 provided on a pedestal 15 erected on the framework 11 of the following truck 1 and on a scaffold board 32. and an elevating part 44 which is a ladder for elevating between the scaffolding board 32 and the scaffolding board 32 . The work floor 41 includes beams 411 forming a frame of a floor surface formed of a plurality of steel materials in a grid pattern, flooring 412 spread over the upper surfaces of the beams 411 , and standing so as to surround the beams 411 . It is formed by the handrail material 413 provided. Further, guide rollers 43, 43 are fixed to the work floor 41 for sandwiching the elevating section 44 from both sides thereof. 41 can be stored. That is, one end of the lower part of the elevating unit 44 is placed and supported on the scaffold board 32 of the passage 3, and from a state in which it can be lifted (when it is possible to elevate 44a), the operator M or the like lifts the elevating unit 44 forward, When it is slid upward (at the time of movement work 44b), and the center of gravity moves upward of the lifting section 44 with the guide rollers 43, 43 as fulcrums, the tip of the lifting section 44 descends and becomes horizontal. By sliding the floor material 412 upward at one end of the lower part, the lifting part 44 is stored on the work floor 41 (at the time of storage 44c).
A door portion 42, which will be described later, is attached to the post of the handrail member 413. As shown in FIG.

<Door part>
FIG. 4 shows a front view (as viewed by arrows BB in FIG. 2) of a state in which the door portion according to the embodiment of the present invention is closed.
As shown in the figure, the door portion 42 is attached to the end portion of the lift side of the lift portion 44 of the handrail member 413 . The door portion 42 is composed of left and right door bodies 421 , 421 facing each other and a lock member 422 provided on a post of one of the door bodies 421 . The door bodies 421, 421 are rotatably attached to the supports of the handrail members 413, 413, and can be opened and closed in a double door manner. FIG. 4C shows a retracted state 44c of the lifting unit 44. The door bodies 421, 421 are closed, and the door bodies 421, 421 are locked in the closed state by hanging the lock member 422 on the support of the other door body 421. can.

<Guide roller and sensor>
FIG. 5 shows (a) a side view (C part of FIG. 4) and (a) a front view of the guide rollers and sensors of the lifting equipment that is the embodiment of the present invention (arrows DD in FIG. 5 (a)). indicates
As shown in the figure, the lifting section 44 is in a state 44a when it can be raised and lowered, and 44c when it is closed. possibly embedded. Strikers 46, 46 are fixed to the lower surfaces of the supporting members 441, 441 facing each other. In this embodiment, the strikers 46 , 46 are targets to be detected by a pair of opposing sensors 45 , 45 fixed to the beam 411 . The sensor 45 is a non-contact sensor, and when the lifting unit 44 is retracted (retracted state 44c), the striker 46 is detected and the interlock that restricts the movement of the following truck 1 is released.

<Other configurations>
When the lifting unit 44 is in use (when it can be lifted or lowered 44a), the control unit 47 (Fig. (not shown) is equipped with an interlock that can be electrically controlled so that the following truck 1 cannot be moved. A display unit 48 capable of displaying information sensed by the sensor 45 is provided in the driver's seat of the following bogie 1 . As a result, it is possible to determine in real time whether the lifting unit 44 is capable of being lifted (up and down possible 44a), is being moved (moving work 44b), and is in a retracted state (storage 44c). Furthermore, it has an emergency stop function that stops the following truck 1 by a command from the control unit 47 when the lifting unit 44 is moved (slide or rotate) while the following truck 1 is running.

As described above, according to the lifting equipment and its storage method, the lifting part 44 is rotatable and slidable about the guide rollers 43 installed on the work floor 41, so that a person can move the one end of the lifting part 44 on the passage 3 side. can be stored on the work floor 41 by lifting and sliding in the direction of the other end. As a result, the lifting unit 44 can be easily and reliably separated from the passage 3 when the following truck 1 moves, so the lifting unit 44 may be dragged by the passage 3 as the following truck 1 moves and may be damaged. It is possible to avoid danger such as a person being caught in 4. If the work floor 41 is provided with the door portion 42 that can restrict the lifting and lowering of a person by the lifting portion 44, it is possible to restrict the entry and exit of the person through the lifting portion 44 during the work performed in the following truck 1, and the following truck 1 is moving. In addition, dangerous work such as jumping from the working floor 41 to the passage 3 and jumping from the passage 3 to the working floor 41 can also be restricted. A sensor 45 provided on the work floor 41 can sense the state in which the lifting unit 44 is supported on the passage 3 or stored in the work floor 41. Based on the sensed information, Since the running of the trailing truck 1 can be controlled by the trailing truck 1 or a control unit 47 provided in the driver's seat thereof, the risk of man-made disasters due to human errors such as forgetting or neglecting inspection before movement of the trailing truck 1 can be avoided. Since the state of the lifting part 44 sensed by the sensor 45 can be displayed in the driver's seat of the following truck 1, the risk of running the following truck 1 with the lifting part 44 supported on the passage 3 can be suppressed. While the following truck 1 is running, the following truck 1 can be automatically stopped in an emergency by a command from the control unit 47 based on the information detected by the sensor 45 by moving the lifting unit 44, thereby preventing unsafe behavior. can.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the present invention.

G Ground S Shield Tunnel M Workers, etc. 1 Follower Carriage 11 Frame 12 Leg 13 Traveling Section 14 Carriage Handrail 15 Frame 2 Track 3 Passage 31 Bracket 32 Scaffold Board 33 Passage Handrail 4 Elevating Equipment 41 Work Floor 411 Beam 412 Floor material 413 Handrail material 42 Door part 421 Door main body 422 Lock material 43 Guide roller 44 Elevating part 44a When possible to ascend and descend 44b When moving work 44c When storing 441 Support material 45 Sensor 46 Striker 47 Control part 48 Display part

Claims (6)

Elevating equipment provided on the trailing carriage of the shield machine running on the track in the shield tunnel,
an ascending/descending part consisting of a ladder or stairs, one end of which is supported on a passage provided on the inner wall surface of the shield tunnel;
guide rollers sandwiched from both sides of the elevating unit;
a work floor to which the guide roller is fixed,
The lifting equipment is characterized in that the lifting part is rotatable and slidable about the guide roller as a fulcrum and can be stored in the working floor. 2. The work floor is provided with a door portion for restricting the lifting and lowering between the work floor and the passage in a state in which the elevating portion is stored in the work floor. Lifting equipment as described. The working floor is provided with a sensor for detecting a state in which the lifting unit is supported on the passage or stored in the working floor;
a controller for controlling travel of the trailing truck when the elevator is supported on the aisle based on information sensed by the sensor;
Lifting equipment according to claim 1 or claim 2, further comprising: 4. The lifting equipment according to claim 3, wherein a display unit for notifying the state of the lifting unit is provided in the driver's seat of the following bogie. 3. The following claim 3 or 4, characterized in that, when the elevating section is slid and/or rotated in order to support the trailing truck on the passage while the trailing truck is running, the trailing truck is stopped by a command from the control unit. 4. Lifting equipment according to 4. The lifting equipment storage method according to any one of claims 1 to 5,
A method for storing an elevating unit of an elevating facility, comprising lifting one end of an elevating unit supported on the passage and storing the elevating unit on the work floor while rotating and sliding toward the work floor.

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