JPH0630950Y2 - Tail clearance automatic measuring device for shield machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a tail skin plate of a shield machine and an arrangement of the tail skin plate of the shield machine when constructing a tunnel using the shield machine and the lining segment. The present invention relates to a device for automatically and continuously measuring a clearance with a segment ring, that is, a tail clearance.

[Prior Art] Conventionally, when measuring a clearance between a tail skin plate of a shield machine and a segment ring arranged therein, that is, a tail clearance, an operator has performed visual measurement using a scale.

[Problems to be solved by the device]

However, when the operator visually measures the clearance between the upper part of the tail skin plate and the upper part of the segment ring, it is dangerous and difficult to measure because the visual measurement must be done at a high place where the scaffolding is poor. There may be an error in reading the value or an error such as the measurement position shifting in the circumferential direction of the tail skin plate, and the tail clearance cannot be continuously measured while the shield machine is propelled. There is a problem.

It is an object of the present invention to provide an automatic tail clearance measuring device for a shield machine which can continuously and accurately measure the tail clearance.

[Means for Solving the Problems]

In order to achieve the above object, in the automatic tail clearance measuring device for a shield machine of the present invention, the spreader 2 fixed to the rear end of the shield jack 1 of the shield machine has an intermediate portion of the displacement gauge support arm 3. Is rotatably attached, and a holding member 4 is fitted to the tip of the displacement gauge support arm 3 so as to be movable in a direction perpendicular to the inner surface of the shield tail skin plate 5. A displacement gauge main body 8 of a displacement gauge 7 having a measuring movable member 6 that moves in a direction perpendicular to the inner surface is fixed to the holding member 4, and the holding member 4 is
An inner corner of the front portion of the segment including a rear side surface 10 engaged with the front surface of the segment 9 and a guide slope 11 inclined rearward from the inner end of the rear side surface 10 and away from the shield tail skin plate 5. The engaging member 12 is fixed, and the holding member 4 is engaged with a pressing spring 13 which presses the holding member 4 toward the shield tail skin plate 5, and the skin plate detecting member 14 fixed to the measuring movable member 6. The pressing spring 15 that presses this against the shield tail skin plate 5 is engaged, and the rotation pressing member that rotates the displacement gauge support arm 3 so as to move the tip side of the displacement gauge support arm 3 rearward. 16 are engaged.

[Action]

When the shield jack 1 is extended after the segment ring is assembled in the shield tail skin plate 5 of the shield machine, the displacement gauge support arm 3 is rotated by the rotation pressing member 16 and the skin plate detection member 1
4 is pressed against the pressing spring 15, the holding member 4,
The displacement gauge 7, the segment inner front corner engaging member 12, the skin plate detecting member 14, etc. are moved rearward, and the guiding slope 11 of the segment front inner corner engaging member 12 engages with the inner front edge of the segment 9. , Its front inner edge is the rear side surface 1
0 until reaching the intersection of the guiding slope 11, the segment front inner corner engaging member 12, the holding member 4, and the displacement gauge body 8
Moves in a direction away from the shield tail skin plate 5, so that the tail clearance immediately before the start of the shield machine can be automatically measured, and when the size of the tail clearance fluctuates during the promotion of the shield machine. Is moved in a direction perpendicular to the inner surface of the shield tail skin plate 5 while the skin plate detection member 14 to which the measuring movable member 6 of the displacement gauge 7 is fixed is always in contact with the inner surface of the shield tail skin plate 5. Therefore, the size of the tail clearance can be continuously measured even while the shield machine is propelled.

〔Example〕

 Next, the present invention will be described in detail with reference to the illustrated example.

1 to 8 show a tail clearance automatic measuring device for a shield machine according to an embodiment of the present invention, which is a shield jack 1 for a shield machine.
A bracket 19 is fixed to a spreader 2 fixed to a rear end portion (a rear end portion in the excavation direction), and an intermediate portion of the displacement gauge support arm 3 is different from the bracket 19 in the shield tail skin plate in the shield machine. 5 is rotatably attached by a support shaft 20 extending in a direction intersecting the inner surface of 5, and a base end portion of a tubular body 22 is integrally connected to an end plate 21 and is attached to a distal end portion of the tubular body 22. Outward flange 23
Are integrally connected to form a holding member 4, and the tubular body 22 of the holding member 4 slides in a direction perpendicular to the inner surface of the shield tail skin plate 5 with respect to the tip end portion of the displacement gauge support arm 3. It is fitted movably and non-rotatably.

The displacement gauge 7 composed of a known strain gauge type transducer is arranged so as to extend in a direction perpendicular to the inner surface of the shield tail skin plate 5, and the tubular displacement gauge body 8 of the displacement gauge 7 is End plate 21 in holding member 4
The flange that is fitted to the end plate 21 of the holding member 4 is fixed to the end plate 21 of the holding member 4 with a screw 24.

An inner cylinder 25 and an outer cylinder 26, which are concentrically arranged on the outer side of the cylindrical body 22, are integrally connected to the distal end portion of the displacement gauge support arm 3, and are integrally connected to the end plate 27. Skin plate detection member 14 including the cylindrical body 28
The cylindrical body 28 in FIG. 2 is slidably inserted between the inner cylinder 25 and the outer cylinder 26, and the end of the skin plate detection member 14 is attached to the distal end portion of the measuring movable member 6 in the displacement gauge 7. A board 27 is fixed, and a pressing spring 13 composed of a coil spring for pressing the holding member 4 toward the shield tail skin plate 5 is provided between the outward flange 23 of the holding member 4 and the displacement gauge support arm 3. The skin plate detection member 14 is interposed and pushed between the tip end of the tubular body 28 of the skin plate detection member 14 and the groove bottom portion between the inner cylinder 25 and the outer cylinder 26 to the inner surface of the shield tail skin plate 5. A pressing spring 15 composed of a coil spring for attachment is interposed.

The front portion of the segment front inner corner engaging member 12 is fixed to the rear portion of the end plate 21 of the holding member 4 by welding, and the segment front inner corner engaging member 12 is engaged with the front surface of the segment 9 on the rear side surface. The displacement gauge support arm includes an inner end portion of the rear side surface 10, that is, an end portion on the center side of the shield machine main body, and a guide slope 11 that is inclined rearward and away from the shield tail skin plate 5. The tip end side portion of 3 and the spreader 2 are connected via a rotation pressing member 16 formed of a tension coil spring that rotates so that the tip end side of the displacement gauge support arm 3 is moved rearward.

The inner cylinder 25, the outer cylinder 26, and the cylindrical body 28 are eccentric with respect to the center of the displacement gauge 7, and the eccentric cylinder 34 connected to the end plate 21 is provided at the tip of the displacement gauge support arm 3. The holding member 4 and the skin plate detection member 14 are prevented from rotating with respect to the displacement gauge support arm 3 by being fitted to the eccentric outer cylindrical surface.

The front end of the arm rotation operation member 18 is fixed to the shield machine main body 17 in front of the displacement gauge support arm 3, and the rear end of the arm rotation operation member 18 is the base end of the displacement gauge support arm 3. The electric cable 29, which is arranged so as to face the front of the displacement section and has one end connected to the displacement gauge 7, is a cable bending prevention winding attached to the shield machine main body 17 in front of the displacement gauge 7. Opportunity 3
The winding machine 30 constantly applies tension to the electric cable 29 so that the electric cable 29 is not largely bent even when the displacement gauge 7 is wound around a drum of 0 and the displacement gauge 7 moves in the front-rear direction.

When the shield jack 1 is shortened to the shortest state, as shown in FIG. 1, the base end portion of the displacement gauge support arm 3 is pressed by the arm rotation operation member 18, and the displacement gauge support arm 3 is segmented. The segment is held in the front inner corner engaging member storage position, and in this state, the segment front inner corner engaging member 12 is held.
Are stored so that they do not project rearward from the rear surface of the spreader 2.

As shown in FIG. 3, out of a large number of shield jacks 1 provided around the inside of the shield machine main body 17, the shield machine 1 is equipped at the X-axis or Y-axis of the cross section of the shield machine main body 17 or at a position closest thereto. To the spreader 2 attached to the four shield jacks 1 that have been set, the bracket 19 in the automatic tail clearance measuring device 31 configured as described above.
Is fixed.

FIG. 8 shows a tail clearance automatic measurement display circuit, in which each displacement gauge 7 is connected to a display panel 33 having an arithmetic function via an electric cable 29 wound around a winder 30 and a signal converter 32. It is connected.

The shield tail skin plate 5 of the shield machine is used by using the automatic tail clearance measuring device of the above embodiment.
When measuring the size of the tail clearance between the tail segment and the segment, after assembling the foremost segment ring in the shield tail skin plate 5, the shield jack 1 is extended from the state of FIG. By this, each part supported is moved backward.

By doing so, the spreader 2 is pressed against the front surface of the segment, and the displacement gauge support arm 3 is separated from the arm rotation operation member 18, so that the displacement gauge support arm 3 is moved by the force of the rotation pressing member 16 to the front of the segment. The inner corner engaging member is rotated in the rearward moving direction (the direction of arrow A in FIG. 1), and the segment front inner corner engaging member 12 moves rearward in a state in which the guide slope 11 is engaged with the front inner edge of the segment 9. As they are moved, the guiding action of the guiding slope 11 causes the segment front inner corner engaging member 12, the holding member 4, and the displacement gauge body 8 to separate from the shield tail skin plate 5 against the force of the pressing spring 13. When the rear side surface 10 of the segment front inner corner engaging member 12 hits the front surface of the segment 9 as shown in FIG. Sealed and, in a state where the segment front inner corner engagement member 12 is engaged with the front inner corner of the segment 9. Since the thickness of each segment 9 is constant, when the segment inner front corner engaging member 12 engages with the inner front corner of the segment 9, the displacement gauge 7 causes the inner surface of the shield tail skin plate 5 and the segment 9 to move. The size of the tail clearance with the front outer surface is measured.

The output electric signals from the vertical and horizontal displacement gauges 7 are sent to the display panel 33 via the electric cable 29 and the signal converter 32, and the display panel 33 calculates vertical values or horizontal values. Numerical values of the vertical value and the parallel value are displayed on the display panel 33.

Next, when all the shield jacks 1 are extended and the shield machine is propelled forward, when the segment ring moves toward or away from the shield tail skin plate 5 and the tail clearance fluctuates, the skin changes. While keeping the plate detection member 14 in contact with the shield tail skin plate 5, the plate detection member 14 moves in a direction perpendicular to the inner surface of the shield tail skin plate 5, and
The movable measuring member 6 in the displacement gauge 7 also moves by the same amount in the same direction as the skin plate detecting member 14, and the numerical values representing the magnitudes of the vertical and horizontal tail clearances are continuously displayed on the display panel 33. Therefore, the operator can know the magnitudes of the vertical and horizontal tail clearances immediately before the start of propulsion of the shield machine, and the distance corresponding to the width in the front-rear direction of one segment ring after the propulsion is started. Until the propulsion is completed, the magnitudes of the vertical and horizontal tail clearances can be continuously monitored, so that the operation and propulsion management of the shield machine can be easily performed.

After propelling the shield machine by a distance corresponding to the width of one segment ring in the front-rear direction, when the shield jack 1 is shortened, the segment front inner corner engaging member 1
Since 2 is disengaged from the segment 9, the segment inner front corner engaging member 12, the holding member 4 and the displacement gauge body 8 are moved toward the shield tail skin plate 5 by the pressing spring 13, and then the shield jack 1 is moved to the shortest position. When the state becomes close to the state, the base end portion of the displacement gauge support arm 3 engages with the rear end portion of the arm rotation operation member 18, and when the shield jack 1 is further shortened, the displacement gauge support arm 3 rotates. When the shield jack 1 is shortened to the shortest state by rotating the segment front inner corner engaging member against the force of the dynamic pressing member 16, as shown in FIG. 1, the segment front inner corner engaging member is engaged. The member 12 is stored so as not to project rearward from the rear surface of the spreader 2. Therefore, when the segment ring is reassembled, the segment inner front corner engaging member 12 does not interfere with the assembly work.

After assembling the segment ring in the shield tail skin plate 5 after the shield machine has been promoted, while measuring the tail clearance again as described above,
Promote shield machine.

If the shield machine propelled by the shield jack 1 deviates from the propulsion reference line, the shield machine body 1
A part of the shield jack 1 around 7 is extended to correct the direction of the shield machine.

In this case, if the direction correction amount exceeds the limit value, 1
After the shield machine is propelled by a distance corresponding to the width of one segment ring in the front-rear direction, the assembly of the segment ring in the shield tail skin plate 5 may be hindered and the segment ring having a predetermined shape may not be assembled. However, as in the above-mentioned embodiment, the tail clearance conversion measuring devices are arranged vertically and horizontally in the shield machine main body 17, and the tail clearance displacement is constantly and continuously dissipated by the displacement gauges 7 while the shield machine is propelled. It measures and sends the output electric signal of the upper and lower displacement gauges 7 to the display panel 33 via the signal converter 32 attached thereto, calculates the vertical value by the display panel 33, and displays the numerical value of the vertical value. And, the output electric signals of the left and right displacement gauges 7 are sent to the display panel 33 via the signal converter 32 attached thereto, and the display panel 33 makes horizontal movement. Since the value of the horizontal value is calculated and calculated, the operator of the shield machine can correct the direction within the range of the tail clearance value set in advance, so that the amount of direction correction exceeding the limit value is corrected. Can be prevented.

Further, in the case of the above-described embodiment, when the shield jack 1 is shortened, the arm rotation operation member 18 automatically rotates the displacement gauge support arm 3 to the segment front inner corner engaging member storage position, and the segment front inner corner. Since the engaging member 12 is stored so as not to project rearward from the rear surface of the spreader 2, the segment ring can be assembled in the shield tail skin plate 5 at the rear portion of the spreader 2 without any trouble.

When carrying out the present invention, a pressing member other than a spring may be adopted as the rotating pressing member 8.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

When the shield jack 1 is extended after the segment ring is assembled in the shield tail skin plate 5 of the shield machine, the displacement gauge support arm 3 is rotated by the rotation pressing member 16 and the skin plate detection member 1
4 is pressed against the pressing spring 15, the holding member 4,
The displacement gauge 7, the segment inner front corner engaging member 12, the skin plate detecting member 14, etc. are moved rearward, and the guiding slope 11 of the segment front inner corner engaging member 12 engages with the inner front edge of the segment 9. , Its front inner edge is the rear side surface 1
0 until reaching the intersection of the guiding slope 11, the segment front inner corner engaging member 12, the holding member 4, and the displacement gauge body 8
Moves in a direction away from the shield tail skin plate 5, so that the tail clearance immediately before the start of shield machine advancement can be measured automatically and accurately,
Further, when the size of the tail clearance fluctuates during the propulsion of the shield machine, the skin plate detection member 14 to which the measuring movable member 6 of the displacement gauge 7 is fixed is always in contact with the inner surface of the shield tail skin plate 5. While keeping the above, the tail clearance skin plate 5 moves in a direction perpendicular to the inner surface thereof, so that the size of the tail clearance can be continuously measured even while the shield machine is being propelled. And promotion management is easy.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view showing an automatic tail clearance measuring device when an inner corner engaging member of a segment is stored, and FIG. FIG. 3 is a plan view showing the tail clearance automatic measuring device when the corner engaging member is projected rearward of the spreader, and FIG. 3 shows the arrangement of the shield jack, the spreader, and the tail clearance automatic measuring device in the shield machine main body. Fig. 4 is a front view of a vertical section, Fig. 4 is a front view of the automatic tail clearance measuring device, Fig. 5 is a vertical side view showing the relationship between a part of the automatic tail clearance measuring device, the shield machine body, and the segment. Fig. 5 is an enlarged vertical side view showing a part of Fig. 5, Fig. 7 is a cross-sectional view taken along the line AA of Fig. 6, and Fig. 8 is an installation state of a cable bending prevention winder for winding an electric cable. Longitudinal side view showing, FIG. 9 is a diagram illustrating a tail clearance automatic measurement display circuit. In the figure, 1 is a shield jack, 2 is a spreader,
Reference numeral 3 is a displacement gauge support arm, 4 is a holding member, 5 is a shield tail skin plate, 6 is a movable member for measurement, 7 is a displacement gauge, 8 is a displacement gauge main body, 9 is a segment, 10 is a rear side surface, and 11 is a guide slope. , 12 is a segment front inner corner engaging member, 13 is a pressing spring, 14 is a skin plate detecting member,
Reference numeral 15 is a pressing spring, 16 is a rotating pressing member, 17 is a shield machine main body, 18 is an arm rotating operation member, 19 is a bracket, 20 is a support shaft, 21 is an end plate, 22 is a cylinder, and 23
Is an outward flange, 24 is a screw, 25 is an inner cylinder, 26 is an outer cylinder, 28 is a tubular body, 29 is an electric cable, 30 is a cable bending prevention winder, 31 is an automatic measuring device, and 32 is a signal converter. , 33 are display boards.

Claims (1)

[Scope of utility model registration request] 1. An intermediate portion of a displacement gauge support arm 3 is rotatably attached to a spreader 2 fixed to a rear end portion of a shield jack 1 in a shield machine, and a tip portion of the displacement gauge support arm 3 is attached. In the displacement meter 7 in which the holding member 4 is movably fitted to the inner surface of the shield tail skin plate 5 in a direction perpendicular to the inner surface of the shield tail skin plate 5, and the movable member 6 for measurement moves in the direction perpendicular to the inner surface of the shield tail skin plate 5. The displacement gauge body 8 is fixed to the holding member 4, and the holding member 4 has a rear side surface 10 engaged with the front surface of the segment 9 and a shield tail skin plate from the inner end of the rear side surface 10 toward the rear. 5, a segment front inner corner engaging member 12 provided with a guide slope 11 inclined so as to be separated from 5 is fixed to the holding member 4 and the shield tails. A pressing spring 13 that presses toward the plate 5 is engaged, and a pressing spring 15 that presses the skin plate detecting member 14 fixed to the measuring movable member 6 against the shield tail skin plate 5 is engaged. A tail clearance automatic measuring device for a shield machine, which is engaged with a displacement pressing member 16 which is engaged with the displacement gauge support arm 3 so as to rotate the displacement gauge support arm 3 so as to move the tip end side of the displacement gauge support arm 3 rearward.