JP3752735B2 - Segment support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to segment support. More specifically, the present invention relates to a segment support that can adjust the inclination in the front-rear direction of the segment.
[0002]
[Prior art]
Traditionally, shield machines have been used to dig tunnels in the soil.
[0003]
As shown in FIGS. 8 to 11, the shield machine excavates soil by rotating a cutter 2 with a disc-like cutter 2 rotatably attached to the front end surface of a cylindrical shield frame 1. Then, the segment assembling unit 5 provided inside the shield frame 1 is used to assemble the arc-shaped concrete segment 5 in the excavation pit 4 excavated by the cutter 2 to construct the concrete tunnel 6. In addition, the shield frame 1 is propelled by supporting the reaction force at the tip of the existing part of the tunnel 6 by the shield jack 7 provided inside the shield frame 1.
[0004]
Among these, as shown in detail in FIGS. 9 to 11, the segment assembling apparatus 3 is circumferentially connected to the shield frame 1 via a plurality of support rollers 8, a rotation motor 9, a gear 10, and a gear 11. A rotating frame 12 that is rotatably supported, a suspension beam 16 that is attached to the rotating frame 12 via a support arm 13, a guide rod 14, and a radial telescopic jack 15 so as to be movable in the radial direction; A front-rear sliding frame 19 attached to the beam 16 via a guide rod 17 and a front-rear moving jack 18, and a hanging bracket 20 of the segment 5 attached to the front-rear sliding frame 19 with a pin 21 A pair of suspension pieces 22 to be pivotally supported, and a pair of support pieces 23 attached to both sides of the suspension piece 22 of the longitudinal sliding frame 19 via support jacks 23. It is composed of a segment support 24.
[0005]
Reference numeral 25 denotes a counterweight attached to the opposite side of the rotary frame 12 from the suspension beam 16.
[0006]
In the segment assembling apparatus 3, first, with respect to the segment 5 that has been carried into the shield frame 1 by a segment conveying apparatus (not shown), the suspension piece 22 attached to the longitudinal sliding frame 19 and the segment 5 are detachable. The segment 5 is pivotally supported by the suspended piece 22 by inserting the pin 21 after aligning with the attached hanging bracket 20, and in this state, the support jack 23 is extended to slide in the front-rear direction. A pair of segment supports 24 attached to both sides of the suspension piece 22 of the frame 19 are pressed against the segment 5 to support the segment 5 at three points. The segment 5 can be supported in an inclined state around the pin 21 by changing the extension amount of the support jack 23 on the left and right. Alternatively, the inclination of the segment 5 can be adjusted by adjusting the extension amount of the left and right support jacks 23.
[0007]
When the segment 5 is supported in this way, the rotary frame 9 supported by the plurality of support rollers 8 on the shield frame 1 via the gears 10 and 11 is driven by driving the rotation motor 9. By rotating in the circumferential direction, the segment 5 supported by the suspension piece 22 of the longitudinal sliding frame 19 is moved to a position to be inserted.
[0008]
Further, if necessary, the longitudinal moving jack 18 is extended and contracted to move the longitudinal sliding frame 19 attached to the suspension beam 16 in the longitudinal direction of the shield frame 1 along the guide rod 17. The position of the segment 5 in the front-rear direction is adjusted.
[0009]
Finally, by extending the radial extension jack 15, the suspension beam 16 is moved in the radial direction with respect to the rotating frame 12 along the guide rod 14, and the segment 5 is inserted into a target position.
[0010]
By repeating the above and assembling the segments 5 in the circumferential direction, the existing tunnel 6 is extended.
[0011]
[Problems to be solved by the invention]
However, the conventional segment assembling apparatus has the following problems.
[0012]
That is, the segment 5 is supported at three points by pressing the pair of segment supports 24 attached to both sides of the suspension piece 22 against the segment 5 while the segment 5 is pivotally supported by the suspension piece 22. However, since there is play in the pivoting portion between the suspension piece 22 and the segment 5, when the pair of segment supports 24 are pressed against the segment 5, the segment 5 is fixed and held in a state of being inclined in the front-rear direction. Sometimes.
[0013]
Then, as shown in FIG. 12, when the segment 5 is to be inserted at a predetermined position, the segment 5 held at an inclination cannot be inserted due to interference with the existing segment 5.
[0014]
As shown in FIG. 13, this problem is particularly serious when the segment 5 has a wedge shape, or when the segment 5 has interlocking hoses 26 and 27. Become.
[0015]
On the other hand, when the tunnel 6 is curved, as shown in FIG. 14, the segment 5 cannot be assembled successfully unless the inclination of the segment 5 in the front-rear direction can be adjusted.
[0016]
Therefore, conventionally, the support jack 23 is contracted to loosen the press by the segment support 24 and adjust the inclination of the segment 5 in the front-rear direction by human power. However, it is cumbersome and time-consuming to perform such operations manually.
[0017]
In view of the above circumstances, an object of the present invention is to provide a segment support that can adjust the inclination in the front-rear direction of the segment.
[0018]
[Means for Solving the Problems]
The present invention provides a support pad 30 that holds a segment 5 in a segment support 28 that is attached to a support jack 23 of the segment assembling apparatus 3 and that presses and fixes the segment 5 pivotally attached to the hanging beam 16 . A support support 29 attached to the front / rear direction slide body 31 and directly fixed to the support jack 23 and a yawing adjusting device 34 interposed between the front / rear direction slide body 31 and the front / rear direction slide body 31 and the support pad. The segment support 30 is characterized in that 30 can be moved in the longitudinal direction 33 of the shield frame 1 with respect to the support support 29 .
[0019]
In this case, a centering device 35 for returning the longitudinal slide body 31 to the neutral position may be interposed between the support support 29 and the longitudinal slide body 31 .
[0020]
According to the above means, the following operation can be obtained.
[0021]
The segment 5 is supported at three points by pressing the pair of segment supports 28 against the segment 5 while the segment 5 is pivotally attached to the hanging beam 16.
[0022]
At this time, since there is play in the pivotally attached portion of the hanging beam 16 and the segment 5, when the pair of segment supports 28 are pressed against the segment 5, the segment 5 is fixed and held in a state inclined in the front-rear direction. There is.
[0023]
Then, when the segment 5 is to be inserted at a predetermined position, the segment 5 held at an inclination cannot be inserted due to interference with the existing segment 5. Since the support pad 30 is supported so as to be movable in the front-rear direction 33 of the shield frame 1, the tilt of the segment 5 in the front-rear direction 33 can be adjusted by the segment support 28 by moving the yawing adjustment device 34 to expand and contract. The segment 5 can be fixed mechanically in a fixed state.
[0024]
Thereby, it becomes possible to insert the segment 5 easily and accurately without causing interference with the other segments 5, and the segment 5 can be prevented from being chipped.
[0025]
Further, even when the segment 5 has a wedge shape or when the segment 5 has an interlocking tenon, the inclination of the segment 5 in the front-rear direction 33 is mechanically corrected, The segment 5 can be inserted easily and accurately so as not to interfere with the segment 5.
[0026]
On the contrary, even when the tunnel 6 is curved, the segment 5 can be assembled by mechanically adjusting the inclination of the segment 5 in the front-rear direction.
[0027]
Moreover, since the apparatus is small, it can be easily attached to a conventional segment assembling apparatus.
[0028]
After inserting the segment 5 and then separating the segment 5, the support pad 30 may be returned to the neutral position by expanding and contracting the yawing adjusting device 34. Since the amount of tilt adjustment of 33 is actually a very small value of several tens of millimeters, the control for returning to the neutral position is rather severe, so that the present invention allows the yaw adjusting device 34 to release the pressure. Like that.
[0029]
Then, since the yawing adjusting device 34 becomes free, the centering device 35 functions and the support pad 30 is returned to the neutral position.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0031]
1-7 is an example of embodiment of this invention.
[0032]
The basic structure of the shield machine and the segment assembly apparatus provided inside the shield machine is the same as that shown in FIGS. 8 to 14, and therefore, these drawings will be referred to as necessary.
[0033]
In the figure, reference numeral 1 denotes a cylindrical shield frame, 2 denotes a cutter attached to the tip of the shield frame 1, 3 denotes a segment assembling device provided inside the shield frame 1, and 6 denotes a segment by the segment assembling device 3. 5 is a tunnel constructed by assembling 5, 7 is a shield jack for propelling the shield frame 1, 12 is a rotating frame constituting the segment assembling apparatus 3, and 16 is a rotating frame 12 via a support arm 13 and a guide rod 14. A suspension beam 20 is attached to the suspension frame 20, a suspension fitting 20 is used to support the segment 5 on the suspension piece 22 of the suspension beam 16 via a pin 21, and 25 is a counterweight attached to the rotary frame 12.
[0034]
The segment support 28 attached to the support jack 23 includes a support support 29 that is directly fixed to the support jack 23 and a support pad 30 attached to the support support 29. The support pad 30 is movably supported in the front-rear direction 33 of the shield frame 1 with a front-rear direction slide body 31 and a bearing 32 interposed between the support support 29 and the support pad 30, and supported. A yawing adjusting device 34 such as a longitudinal position adjusting jack that can move the support pad 30 in the longitudinal direction 33 of the shield frame 1 is interposed between the support 29 and the longitudinal slide body 31.
[0035]
Further, a spring-type centering device 35 for returning the support pad 30 to the neutral position in the front-rear direction 33 is interposed between the support support 29 and the front-rear slide body 31.
[0036]
The centering device 35 is provided at the end of the support pad 30 opposite to the yawing adjusting device 34, and is fixed to an extension 36 formed at a corresponding end of the support support 29 with a bolt 37 or the like. A spring case 39 having a spring locking surface 38 inside, a spring 42 accommodated in the spring case 39 with flanged bosses 40 and 41 fitted to both ends, and a spring mechanism for closing the spring case 39 A guide rod 44, one end of which is fixed to the stop nut 43 and the front / rear direction slide body 31, movably penetrates the spring case 39 and the spring locking nut 43, and extends in the front / rear direction 33, and the guide rod 44 And urging surfaces 45 and 46 formed at positions corresponding to both ends of the spring 42.
[0037]
Note that the yaw adjusting device 34 and the centering device 35 may be attached to the left and right segment supports 28 so as to be opposite to each other, and the yawing adjusting device 34 may be operated in reverse.
[0038]
The guide rod 44 includes urging surface forming members 47 and 48 and a connecting rod 49 that connects the urging surface forming members 47 and 48.
[0039]
Further, in the drawing, reference numeral 50 denotes a guide rod stopper attached to the longitudinal slide body 31.
[0040]
Next, the operation will be described.
[0041]
Since the operations of the shield machine and the segment assembling apparatus are the same as those shown in FIGS.
[0042]
In the present invention, a pair of segment supports 28 attached to both sides of the suspension piece 22 are pressed against the segment 5 in a state where the segment 5 is pin-supported on the suspension piece 22 of the suspension beam 16, thereby Support with dots.
[0043]
At this time, since there is play in the pivoting portion between the suspension piece 22 and the segment 5, when the pair of segment supports 28 are pressed against the segment 5, the segment 5 is fixedly held in a state tilted in the front-rear direction. There is.
[0044]
Then, as shown in FIG. 12, when trying to insert the segment 5 at a predetermined position, the segment 5 held at an inclination cannot be inserted due to interference with the existing segment 5, Since the support pad 30 is supported so as to be movable in the front-rear direction 33 of the shield frame 1 via the front-rear direction slide body 31 and the bearing 32, the yawing adjustment device 34 such as a front-rear direction position adjustment jack can be expanded and contracted. By moving, the inclination of the segment 5 in the front-rear direction 33 can be mechanically corrected in a state where the segment 5 is fixed by the segment support 28.
[0045]
Thereby, it becomes possible to insert the segment 5 easily and accurately without causing interference with the other segments 5, and the segment 5 can be prevented from being chipped.
[0046]
Further, as shown in FIG. 13, even when the segment 5 has a wedge shape, or when the segment 5 has interlocking hoses 26 and 27, the inclination of the segment 5 in the front-rear direction 33 It is possible to insert the segment 5 easily and accurately so as not to interfere with the other segments 5.
[0047]
On the other hand, as shown in FIG. 14, even when the tunnel 6 is curved, the segment 5 can be assembled by mechanically adjusting the inclination of the segment 5 in the front-rear direction.
[0048]
Moreover, since the apparatus is small, it can be easily attached to a conventional segment assembling apparatus.
[0049]
Then, after inserting the segment 5 and separating the segment 5 from the suspension piece 22, the support pad 30 is returned to the neutral position by expanding and contracting the yawing adjusting device 34 such as a longitudinal position adjusting jack. However, since the amount of inclination adjustment in the front-rear direction 33 by the yawing adjustment device 34 is actually a very small value of several tens of millimeters, the control for returning to the neutral position is rather severe, and the present invention Then, the pressure of the yawing adjusting device 34 is released.
[0050]
Then, since the yawing adjusting device 34 such as a longitudinal position adjusting jack becomes free, the centering device 35 functions to return the support pad 30 to the neutral position.
[0051]
That is, when the support pad 30 is in the neutral position, as shown in FIG. 2, the spring 42 has flanged bosses 40 and 41 at both ends, the spring locking surface 38 of the spring case 39, and the spring locking nut. 43, the urging surfaces 45 and 46 of the guide rod 44 are not urged. However, when the support pad 30 is removed from the neutral position, as shown in FIGS. The spring 42 is compressed between either the spring locking surface 38 of the case 39 or the spring locking nut 43 and the biasing surfaces 45 and 46 on the opposite side of the guide rod 44.
[0052]
In this state, when the yawing adjusting device 34 becomes free, the spring 42 tries to return to the original length, so that the urging surfaces 45 and 46 in contact with the spring 42 are urged and the guide rod 44 is pushed back. As a result, the support pad 30 is returned to the neutral position.
[0053]
As a result, it is possible to easily return the support pad 30 to the neutral position without using an electrical control means.
[0054]
It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
[0055]
【The invention's effect】
As described above, according to the segment support of the present invention, the following excellent effects can be obtained.
[0056]
1) The inclination of the segment 5 in the front-rear direction can be adjusted while being fixed by the support pad 30. Thus, the segment 5 can be assembled with high accuracy without causing any chipping.
[0057]
2) Therefore, a segment with a tenon or a wedge-shaped segment can be easily assembled, and the segment can be tilted to a required angle even with a curve or the like.
[0058]
3) Since the inclination of the segment 5 in the front-rear direction can be mechanically adjusted, the manual operation is eliminated and the segment 5 can be assembled efficiently.
[0059]
4) Since the yawing adjusting device 34 and the centering device 35 are compactly assembled with respect to the segment support 28, it can be easily attached to the existing segment assembling device.
[0060]
5) The centering device 35 makes it possible to easily return the support pad 30 to the neutral position without using electrical control means.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of an embodiment of the present invention as seen from the rear.
FIG. 2 is an enlarged side cross-sectional view of a portion II in FIG.
FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;
4 is a view taken along arrow IV-IV in FIG. 2;
5 is a VV arrow view of FIG.
FIG. 6 is an operation diagram of the centering device.
FIG. 7 is another operation diagram of the centering device.
FIG. 8 is a partially broken perspective view of a conventional example viewed from the rear.
9 is a view taken along arrow IX-IX in FIG.
10 is a view taken in the direction of arrows XX in FIG. 9;
11 is an enlarged view of a portion XI in FIG.
FIG. 12 is a schematic view showing a state in which a segment is inclined in the front-rear direction.
FIG. 13 is a schematic view showing a state in which a wedge-shaped segment and a segment with a tenon are inclined in the front-rear direction.
FIG. 14 is a schematic diagram showing a state where the tunnel is curved.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shield frame 3 Segment assembly apparatus 5 Segment 16 Suspension beam 23 Support jack 28 Segment support 29 Support support tool 30 Support pad 31 Front-rear direction slide body 33 Front-rear direction 34 Yawing adjustment apparatus 35 Centering apparatus

Claims (2)

In the segment support (28) which is attached to the support jack (23) of the segment assembling apparatus (3) and is fixed by pressing the segment (5) pivotally attached to the suspension beam (16), the segment (5 The support pad (30) for holding the support) is attached to the front / rear direction slide body (31), and between the support support (29) fixed directly to the support jack (23) and the front / rear direction slide body (31). By means of the interposed yawing adjusting device (34), the longitudinal slide body (31) and the support pad (30) can be moved in the longitudinal direction (33) of the shield frame (1) with respect to the support support (29). segment support, characterized in that the. The segment support according to claim 1, wherein a centering device (35) for returning the longitudinal slide body (31) to the neutral position is interposed between the support support (29) and the longitudinal slide body (31) .

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