JP3100534B2 - Segment bolt / nut tightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of re-tightening bolts and nuts for connecting segments which are arranged behind a shield excavator and a segment assembling apparatus and are loosened by vibration when excavating a tunnel by a shield method. The present invention relates to a bolt and nut tightening device for a segment.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, in a tunnel 2 behind a shield machine 1, segment pieces are assembled at the rear of the shield machine 1 to form cylindrical segments 3.
Device (segment assembling device) 4 that forms
And a back support truck 5 equipped with a sediment discharge facility for discharging the sediment excavated by the shield machine 1 and a segment carry-in facility for carrying in a segment piece, and further tighten the bolts and nuts for connecting the segments loosened by vibration or the like. Therefore, a bolt / nut tightening device 6 is provided.

[0003] In the above configuration, after the segment 3 is assembled by the erector device 4, the horizontal support beam 8 is formed along the cross section of the tunnel 2 by the hoist 7 provided at the front of the rear support cart 5. The support beams 8 are installed at regular intervals in the length direction of the vehicle 2 and upper and lower traveling rails 9A and 9B are laid. The rear support cart 5 is moved on the upper running rail 9A.

As shown in FIG. 7, the bolt / nut tightening device 6 includes an upper tightening portion 6a disposed above a support beam 8.
And a lower tightening portion 6b. And upper tightening part 6
The upper carriage 11A, which is guided by the upper traveling rail 9A and is movable, is disposed at a, and the lower carriage 11B, which is guided by the lower traveling rail 9B and is movable, is disposed at the lower tightening portion 6b. ing. Further, the upper bogie 11A and the lower bogie 11B are respectively provided with upper and lower guide rails 12A and 12B in the form of an arc centered on the axis O of the tunnel 2, and these upper and lower guide rails 12A and 12B are respectively provided with vertical tighteners. 13A and 13B are provided movably.

[0005]

However, the above bolts
According to the nut tightening device 6, the upper traveling rail 9A is usually laid for traveling of the rear support cart 5 or the like in the rear equipment of the shield excavator 1, while the lower traveling rail 9B is provided with bolts and nuts. It is necessary to lay it for the tightening device 6, which is an extra work. In addition, since the apparatus is composed of the upper tightening portion 6a and the lower tightening portion 6b, the entire device becomes large, the cost increases, and the effective use of the space of the support beam 8 is hindered.

The present invention solves the above-mentioned problems, and does not require a lower bogie conventionally disposed below a support beam, does not require the laying of a lower traveling rail, can be reduced in size as a whole, and can support It is an object of the present invention to provide a bolt and nut tightening of a segment in which the lower space of the segment can be effectively used.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to a tunnel excavated by a shield machine, in which a segment is lined, and a horizontal section is formed along a cross section in the segment. A support beam is installed at regular intervals in the length direction of the tunnel, and is a bolt / nut tightening device for a movable segment guided by a travel rail laid on the support beam, and is provided along the travel rail. a movable traveling carriage, with disposing the arc-shaped pivoting guide frame around the segment axis, the frame guide device for rotating the swivel guide frame around the segment axis provided on the revolving guide frame ,
Frame rails are provided at the inner and outer positions,
A drive rack is provided, and the frame guide device
The rotating guide frame is supported by the bogie so that it can rotate freely.
Sets of frame guides that respectively engage with the
Roller and frame drive motor located on the traveling trolley
Is driven to rotate and meshes with the frame drive rack
A revolving pinion is provided on the revolving guide frame, and a tightening device that can retreat to the segment side and retightens the fastening bolts and nuts of the segment is disposed movably along the revolving guide frame on the revolving guide frame. The guide frame and the tightening machine are configured to be movable below the support beam through the space between the support beams.

[0008] Further, in the turning guide frame having the above-described structure ,
Install the device rails at the inside and outside positions, and
And a rotating guide that is rotatably supported by the tightening machine.
Sets that engage with the equipment rails of the
The device guide roller and the frame swivel unit rotate the device
Driven by a motor and meshed with the device drive rack
Provide a device turning pinion, the frame guide device,
The swivel guide frame is configured to be movable to the lowermost part in the segment.

[0009]

In the above construction, the turning guide frame and the tightener can be moved below the support beam by passing through the space between the support beams, and the fastening bolts and nuts of the segments below the support beam can be tightened. Conventionally, there is no need to provide equipment such as a lower bogie for tightening bolts and nuts below the support beam. Therefore, the whole can be reduced in size, and the laying of the lower traveling rail is not required. Further, since the turning guide frame and the tightening device are not always provided in the lower space of the support beam, the lower space can be effectively used.

[0010] Further, by moving the swivel guide frame to the lowermost portion of the segment, the fastening bolts and nuts on the entire circumference of the segment can be tightened, and a dead space conventionally generated near the support beam is reduced. This eliminates the need for additional tightening work by the operator.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bolt and nut tightening device for a segment according to the present invention will be described below with reference to FIGS. The same members as those in the related art are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 1 and 2, on a support beam 8, a traveling carriage 2 guided by a traveling rail 9A and movable.
The traveling carriage 21 has a semicircular turning guide frame 2 centered on the segment axis O.
2 and this turning guide frame 22 is connected to the segment axis O
Guide device 2 that supports the robot so that it can rotate around the center
3 and a tightener 24 guided by the turning guide frame 22 and movable in the circumferential direction. And
The turning guide frame 22 and the tightening device 24 are formed to have a size capable of turning and moving below the support beam 8 via a space L between the two support beams 8.

The traveling vehicle 21 is provided with traveling wheels 25 traveling on the traveling rail 9A at the bottom of a bogie frame 20 having a gate shape in a front view, and a rear traveling wheel 25 is operated by a traveling drive motor 26 to operate a speed reducer. , And is configured to be movable.

As shown in FIG. 3, the revolving guide frame 22 is formed in a rectangular cross section, and includes frame rail portions 31A, 31 arranged at inner and outer rear portions of four corners.
B and device rails 32A, 32B disposed at the front inner and outer positions of the four corners are connected to front and rear face plates 33A, 33B and inner and outer peripheral plates 34A, 34B.
A frame driving rack 35 is provided at the rear of the outer frame rail 31B. A device drive rack 36 is provided in front of the outer device rail 32B. 37 is a reinforcing plate interposed inside.

The frame guide device 23 includes a frame guide section and a frame turning section. In the frame guide portion, a plurality of sets (six or twelve as shown) of frame guide rollers 41 which are rotatably supported by the bogie frame 20 of the traveling bogie 21 and engage with the frame rail portions 31A and 31B, respectively. The frame turning portion is provided with a plurality of (five as shown) frame turning pinions 42 meshed with the frame driving rack 35, and a frame turning device for rotating these frame turning pinions 42 via reduction gears. A motor 43 is provided. At the maximum turning position indicated by the imaginary line in FIG. 1, the turning guide frame 22 has at least three sets of frame guide rollers 4.
1 and two frame turning pinions 42 are meshed with the frame drive rack 35. Thereby, even at the maximum turning position, the weight of the turning guide frame 22 can be sufficiently supported, and the turning driving force can be transmitted.

As shown in FIGS. 4 and 5, the tightening machine 24 includes an apparatus guide 50a and an
0b and a tightening operation section 50c are provided. The device guide portion 50a is provided with two pairs of inner and outer flanged device guide rollers 51 rotatably supported by the device main body 50 and engaged with the device rail portions 32A and 32B.
The device turning portion 50b includes a device turning pinion 52 meshed with the device driving rack 36, and the device turning pinion 5
2 is provided with a device turning motor 53 that rotationally drives the motor 2 through a speed reducer.

Further, the tightening operation section 50c includes an evacuation platform 55 which can be extended and retracted in the radial direction of the segment 3 by the evacuation jack 54, and a longitudinal device 56 using a screw shaft 56a on the evacuation platform 55. And a traversing base 58 movable along the traversing rail 57 in the direction of the axis O of the segment 3, and a traversing device 59 using a screw shaft 59 a on the traversing base 58 along the traversing rail 60. Is provided with a traversing platform 61 movable in the tangential direction. Then, the traverse base 61 is attached to the segment 3 by the rotating device 63.
An arm 62 that is rotatable around the radial axis of the arm is vertically provided, and a nut socket 64 that is rotationally driven with a predetermined rotational torque by a tightening actuator (not shown) is provided at the tip of the arm 62. Have been.

The apparatus main body 50 includes a hydraulic hose for supplying a driving source to each driving device and a cable introduction member 65 for introducing a cable for transmitting and receiving operation signals and power.
Is provided, while the bogie frame 2 of the traveling bogie 21 is provided.
0 is provided with a hydraulic hose or cable reel 66 and a hydraulic hose or cable guide roller 67 at predetermined positions.

In the above configuration, the segment pieces 3a carried in from the rear are assembled in a ring shape by the erector device 4 via the inter-piece bolts and nuts PB in the circumferential direction, and assembled in a ring shape. The segment pieces 3 a are connected in the axial direction by bolts and nuts RB between the rings by the erector device 4 and are assembled into the cylindrical segments 3. Therefore, when the traveling vehicle 21 is stopped at a predetermined position and fixed in position by the rail clamp device 20a, the device turning motor 53 is driven to drive the tightener 24 to the turning guide frame 2.
Move along 2 to the target position and stop. Then, the arm 62 is rotated by the rotating device 63 so that the nut socket 64 is aligned with the direction facing the bolt / nut PB between pieces or the bolt / nut RB between rings.
Then, the traversing device 59 is driven to set the position of the arm 62. Then, the retraction jack 54 is advanced to make the tightener 24 approach the segment 3, and the arm 62 is inserted into the bolt / nut mounting hole 3 b of the segment 3. Then, the nut socket 64 is fitted to the nut of the bolt / nut PB between the pieces and the bolt / nut RB between the rings, and the nut socket 64 is rotated at a predetermined torque by the tightening actuator, so that the bolt / nut PB between the pieces or the bolt between the rings is formed.・ Tighten the nut RB. When the additional tightening is completed, the arm 62 is retracted, and the process proceeds to the next additional tightening operation.

The bolts and nuts PB above the support beam 8
When the RB tightening operation is completed, the frame turning motor 4
3 is driven to rotate the turning guide frame 22 so as to enter the space below the support beam 8 from the space L of the support beam 8 and stop at a predetermined position or at the lowermost position.
Of the bolts and nuts PB and RB below the upper part of the bolt. When this is completed, the swivel guide frame 22 is swung in the opposite direction to enter the space below the support beam 8 and below the opposite side of the support beam 8, and the bolts and nuts PB, RB below the support beam 8 are tightened by the tightening device 24. Work.

[0021]

As described above, according to the segment bolt / nut tightening device of the present invention, the swivel guide frame and the tightening machine are moved below the support beams by passing through the space between the support beams. Since the fastening bolts and nuts of the segments below the beam can be tightened, it is not necessary to provide a conventional equipment such as a lower bogie for tightening the bolts and nuts below the support beam. Therefore, the whole can be reduced in size, and the laying of the lower traveling rail is not required,
Further, since the turning guide frame and the tightening machine are not always provided in the lower space of the support beam, the lower space can be effectively used.

Further, by moving the turning guide frame to the lowermost portion of the segment, the fastening bolts and nuts on the entire circumference of the segment can be tightened, and a dead space conventionally generated near the support beam can be reduced. This eliminates the need for additional tightening work by the operator.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of a bolt and nut tightening device for a segment according to the present invention.

FIG. 2 is a side view of the bolt / nut tightening device.

FIG. 3 is a cross-sectional view showing a turning guide frame of the bolt and nut tightening device.

FIG. 4 is a front view showing a tightening machine of the bolt and nut tightening device.

FIG. 5 is a side view showing a tightening device of the bolt and nut tightening device.

FIG. 6 is a schematic vertical sectional view showing a tunnel by a conventional shield method.

FIG. 7 is a schematic front view showing a conventional segment bolt / nut tightening device.

[Explanation of symbols]

 Reference Signs List 3 segment 3a segment piece 3b bolt / nut mounting hole 4 erector device 8 support beam 9A running rail 21 running trolley 22 turning guide frame 23 frame guide device 24 tightener 31A, 31B frame rail portion 32A 32B device rail portion 35 frame drive rack 36 Device drive rack 41 Frame guide roller 42 Frame turning pinion 43 Frame turning motor 50 Device main body 51 Device guide roller 52 Device turning pinion 53 Device turning motor 54 Ejection jack 56 Vertical device 59 Traversing device 62 Arm 64 Nut socket L Support beam Space of PB bolt and nut between pieces RB bolt and nut between rings

Claims (2)

(57) [Claims] 1. A segment excavated in a tunnel excavated by a shield machine, and horizontal support beams are installed at regular intervals in the length direction of the tunnel along a cross section in the segment. A bolt / nut tightening device for a segment that is guided and movable on a traveling rail laid on the support beam, the traveling vehicle being movable along the traveling rail being provided with an arc shape centered on a segment axis. And a frame guide device for rotating the swing guide frame about the segment axis is provided, and the swing guide frame is provided with a frame rail portion inward and outward.
And a frame drive rack, which is rotatably supported on the traveling guide by the frame guide device.
Each is attached to the frame rail of the swing guide frame.
A plurality of sets of frame guide rollers to be engaged
Is rotationally driven by the frame drive motor
A frame turning pinion that meshes with the frame drive rack
And a tightening device capable of extending and retracting to the segment side and capable of tightening the fastening bolts and nuts of the segment is movably arranged along the turning guide frame on the turning guide frame, and the turning guide frame and A bolt / nut tightening device for a segment, wherein the tightener is configured to be movable below the support beam by passing through the space between the support beams. 2. The apparatus according to claim 2, wherein said swing guide frame has an apparatus rail section.
Are provided at the inner and outer positions, and a device driving rack is provided, and the rotating guide frame is rotatably supported by the tightening machine.
A plurality of sets of device guide rods respectively engaging with the device rails
Roller and the frame swivel unit are rotated by the device swivel motor.
Device pivot pinion engaged with the device drive rack
2. The bolt and nut tightening device for a segment according to claim 1 , wherein the frame guide device is configured such that the swing guide frame is movable to a lowermost portion in the segment.