JP2996620B2 - Rectangular shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rectangular shield machine. More specifically, it is made rotatable around the axis of the trunk,
Further, the present invention relates to a rectangular shield excavator capable of correcting the direction of excavation by enabling curved excavation in vertical and horizontal directions.

[0002]

2. Description of the Related Art Conventionally, in order to form a tunnel having a rectangular final cross-sectional shape, such as a widened tunnel for laying a road with a plurality of lanes, a conventional tunnel cross-section has been proposed. There has been proposed an excavator aiming to excavate a rectangular cross-sectional shape as close as possible to the shape.

[0003] An excavator for excavating a special section other than a circular section as described in Japanese Utility Model Publication No. 4-14552, for example. This excavator moves a single circular section drilling cutter along the cutter guide,
For example, an attempt is made to excavate a horizontal shaft having a rectangular cross section (conventional example 1).

As another prior art, Japanese Patent Application Laid-Open No.
There is an excavator described in 25694. This excavator has a plurality of large-diameter cutters arranged in a freely rotatable manner in order to excavate a tunnel with a widened excavation section such as a highway (four-lane). It is provided with. This is to excavate such that the excavation areas formed by these cutters overlap each other to excavate a tunnel having a widened cross-sectional shape (conventional example 2).

[0005] However, in Conventional Example 1, a cutter disk is moved in an excavated cross section to widen a tunnel. In other words, the direction of excavation changes from time to time, and the direction of the excavation changes slightly due to the characteristics of the excavator itself, or the excavator is twisted carelessly (the excavator rotates around the axis of its trunk). ) There is a risk of excavation. Of course, a similar problem occurs due to an assembling error of the excavator and uneven hardness of the ground to be excavated. In that case, the excavator according to the conventional example 1 cannot correct the excavation direction or the torsion of the excavator in that case.

On the other hand, in the excavator according to the conventional example 2,
It is impossible to correct a change in the direction of excavation or a torsion of the excavator caused by an assembling error of the excavator or uneven hardness of the ground to be excavated.

Furthermore, Japanese Patent Publication No. 4-11718 proposes an excavator in which two cylindrical front bodies are connected to excavate a plurality of tunnels at the same time. This excavator is provided with a hydraulic jack on the connecting face plate of the two cylindrical front bodies, and the hydraulic jacks relatively move the front bodies relative to the tangential direction about the pins of the pin connecting part between the front body and the rear body. It swings in the opposite direction. By doing so, the excavator is to be rotated around the excavator center axis in the connecting plane of the two front bodies (conventional example 3).

However, since the excavator of the prior art 3 swings both front bodies relatively in the tangential direction, only the function of rotating the excavator about the excavator center axis can be achieved. Alternatively, only the bending in the connecting direction can be performed by the directional control hydraulic jack. That is, it cannot be bent in a direction perpendicular to the connection direction. Also,
Only the excavator is rotated about the excavator center axis, and the excavation direction cannot be changed while rotating. Further, no consideration is given to the connection and sealing between the two front bodies and the rear body that swing with each other.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a center bending jack is provided between a rear body and each of a plurality of front body elements, and the center bending jack is connected to the rear body. By arranging them along the inner peripheral edge, each front trunk element can be bent independently in any direction.

[0010]

DETAILED DESCRIPTION OF THE INVENTION A rectangular shield machine according to the present invention comprises a plurality of front fuselage elements connected in a row, each having a rectangular cross section with a main cutter disk on the front surface, and a plurality of center-bent jacks. which are connected front torso elements of a plurality groups, and the body after the Ichiki exhibiting cross-sectional shape that corresponds substantially to the front torso elements of a plurality groups, and a plurality of propulsion jacks for advancing the shield machine with which the plurality of in broken jack is disposed along the inner periphery of the rear body, a direction perpendicular to the column direction before cylinders element around the fitting portion of the front Symbol plurality groups a is configured to be swung, be configured to the front torso elements of the multi-number groups is oscillated in the column direction integrally, wherein the front torso elements with adjacent,
The sliding flanges are in sliding contact with each other, and can be pivoted without being separated from each other by being connected with a pin. The pin is formed on one of the adjacent front trunk elements. And the guide hole formed in the sliding flange of the other front body element .
And the adjacent front body elements are in sliding contact with each other.
And the front edges of the sliding flanges guide each other.
Are separated from each other by being
The groove members are adjacent to each other.
Attach to one of the front edges of the sliding flange
Ru Der those digits.

Therefore, the rectangular shield excavator of the present invention can change the direction of excavation (in other words, curve excavation), and can also rotate the rectangular shield excavator around the excavation direction. Further, it is also possible to change the excavation direction while rotating. In addition, of the plurality of front fuselage elements, for example, without swinging the upper front body element, it is made parallel to the rear trunk axis direction, and by digging by swinging the lower front body element, It is also possible to rotate around the trunk axis of the front trunk element (the front trunk element that does not swing). Of course, if the lower front body element is made to be parallel to the rear trunk axis direction without swinging, and the upper front body element is rocked and excavated, the lower front body element rotates around the trunk axis. Further, it is preferable in that the relative swing between the front body elements is guided by a configuration of simple pin connection, and a smooth relative swing is ensured . In addition, the groove
The relative swing between the front body elements
Preferred for guiding and ensuring smooth relative swing
No.

Another rectangular shield machine according to the present invention comprises a plurality of front fuselage elements connected in a row, each of which has a rectangular cross section with a main cutter disk on the front surface, and a plurality of center bending jacks. A rear fuselage having a cross-sectional shape substantially corresponding to the plurality of front fuselage elements connected to the base front fuselage element, and a plurality of propulsion jacks for advancing the shield excavator, The plurality of center bending jacks are disposed along the inner peripheral edge of the rear trunk, and each of the plurality of front trunk elements is swung about the fitting portion in a direction perpendicular to the row direction. And a plurality of front body elements are integrally rocked in the row direction, and the adjacent front body elements are in sliding contact with each other in a sliding contact flange, and the sliding contact flange is provided. The front edges of the guide grooves are A front body element which is slidable without being separated from each other by being fitted to a material, and the groove member is attached to one of the front end edges of the adjacent sliding contact flanges. An annular seal member is disposed on one of the sliding contact surfaces of the sliding contact flange.

Further, in the above rectangular shield excavator, it is convenient to connect the front fuselage elements to each other in a detachable manner, which is convenient for transportation, and the size of the corresponding rear fuselage is changed to change the size of the front fuselage element. It is preferable in that the number of bases can be increased or decreased. As a method, for example, a portion where the front body elements contact each other, such as the sliding flange, may be bolted.

The annular seal member referred to in the claims is a seal member extending so as to form a loop on the sliding contact surface in the periphery of the sliding flange.
In addition to the rectangular shape, the shape includes an elliptical shape, a polygonal shape, and a loop shape of various shapes. This is because the purpose is to surround the opening formed in the sliding flange and communicating the adjacent front body elements.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rectangular shield machine (hereinafter simply referred to as a machine) according to the present invention will be described below with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a front view showing an embodiment of an excavator according to the present invention, FIG. 2 is a side sectional view of the excavator of FIG. 1, and FIG.
FIG. 4 is a partially cutaway perspective view showing a connection mechanism and a sealing mechanism between the front fuselage elements of the excavator of FIG. 1, and FIG. 5 is a sectional view of the front fuselage elements of the excavator of FIG. FIG. 6 is a partially cutaway perspective view showing another example of the coupling mechanism, FIG. 6 is a schematic perspective view illustrating the fitting of the front trunk and the rear trunk, and FIGS. It is explanatory drawing which shows a state. FIG.
As shown in the figure, three main cutter disks 2 having substantially the same diameter are arranged in a line at the front of the excavator 1. In this embodiment, the main cutter disc 2A at the center projects forward from the main cutter discs 2B on both sides at a predetermined distance D (FIG. 2) so as not to interfere with each other. They are staggered. The distance between the centers of adjacent main cutter disks is equal to or larger than the radius of the main cutter disk and equal to or smaller than the diameter of the main cutter disk.
(FIG. 1). In addition, excavator 1
Are three first front body elements 3A having one main cutter disk 2B, a second front body element 3B having one main cutter disk 2A, and a third front body 3C having one main cutter disk 2B. And a rear body 4 (FIG. 2) connected to the front body 3 in a folding manner.

These main cutter disks 2A and 2B are
As shown in FIG. 2, the front fuselage element 3A of the machine 1
3B and 3C, a pinion 7 that is rotationally driven by a rotational driving device 6 provided behind the bulkhead 5.
Is turned through the gear ring 8. The shaft of the main cutter disk is supported by a seal box 9 and a bearing 10.

Further, in this embodiment, as shown in FIG. 2, an example of a muddy water type using a mud feed pipe 11 and a mud discharge pipe 12 for discharging excavated debris is illustrated. Of course, in the present invention, a well-known excavation method such as a mud pressure type using a screw conveyor or an open mechanical type using a conveyor or the like may be used other than the muddy water type. Both pipes 11 and 12 pass through the center front body element 3B, are bent, and pass through communication holes (not shown) formed in a sliding flange 19 to be described later. It extends to 3C. And
A double pipe 11a, both pipes 11 and 12 being fitted in a watertight manner;
By providing 12a, the front end side of the double pipes 11a and 12a can be rotated around the pipe axis. Therefore,
The sludge pipe 11 and the sludge pipe 12 can follow the relative swing of the front body element.

S is a segment forming a tunnel shell, and 13 is an erector for assembling the segment S. In this embodiment, two erectors, an upper erector 13 and a lower erector, are provided.

Reference numeral 14 denotes a propulsion jack which pushes the assembled segment S and advances the excavator 1 by the reaction force. Reference numeral 15 denotes a center folding jack for inclining the front trunk 3 and the rear trunk 4 with each other by a slight angle (bending the entire trunk). As is apparent from FIG. 3 together, in the present embodiment, the propulsion jacks 14 and the center bending jacks 15 are alternately arranged along the inner peripheral surfaces of the front trunk 3 and the rear trunk 4. In the drawing, hatching indicates a center-folding jack 15 and hatching does not indicate a propulsion jack 14.

The propulsion jack 14 is fixed to a guard member 16 extending in a rectangular ring along the inner peripheral surface of the rear trunk 4.

The center bending jack 15 has a piston portion 15a at the rear end pivotally supported by the guard member 16, and a cylinder portion 15b at the front end has a front body element 3A, 3A.
B and 3C are pivotally supported by fixed ribs 17 extending along the inner peripheral surfaces.

By doing so, the propulsion jack 14
Pushes the assembled segment S, the rear trunk 4 moves forward by the reaction force, and pushes the front trunk 3 via the middle folding jack 15. When the center bending jack 15 provided on one side of the body is fixed in an extended state and the center bending jack 15 provided on the opposite side is fixed in a contracted state, the front body 3 is attached to the rear body 4. On the other hand, it bends toward the contracted side. For example, in FIG. 3, when the middle fold jack 15 provided on the upper side of the paper is extended and the middle fold jack 15 provided on the lower side of the paper is contracted, the entire front body 3 bends below the paper. Also, in FIG. 3, for each front trunk element, a center-bend jack 15 disposed on the left side (or right side) is extended and fixed, and the right side (or left side) thereof is fixed.
When the center-bending jack 15 disposed on the front side is contracted and fixed, the front trunk element is moved to the right side (or left side) with respect to the rear trunk 4.
Bend to the side. In this manner, each front trunk element can be individually bent in the left and right arbitrary directions.

Reference numeral 18 in FIG. 2 denotes a backfill agent injection pipe for injecting a backfill agent into the gap between the assembled segment S and the ground excavation surface.

As is apparent from FIGS. 1 and 2, the adjacent front body elements 3A, 3B and 3C are connected to each other by the connecting pins 20 after the respective sliding contact flanges 19 are brought into sliding contact with each other.
Are linked by Details of the pin connection are shown in FIG. A connecting pin 2 is inserted into a round hole 21 formed in one of the sliding contact flanges 19 and a long hole 22 formed in the other.
By inserting 0, the connected front body elements can be relatively rocked, that is, bendable, and connected so that the front body elements cannot be separated from each other in the axial direction. Since the connecting pin 20 is configured such that its flange portion 20a is detachable, the connecting pin 20 can be removed, and as a result, the front trunk elements can be separated from each other. In FIG. 4, the illustration of the front lower body element 3C at the lower end is omitted.

FIG. 4 shows a sliding contact flange 19 for sliding contact.
The seal member 23 provided on one of the two is shown. The seal member 23 is disposed so as to surround an operator's passage formed on both sliding contact flanges 19 and an opening 24 formed as an insertion passage for the mud feeding pipe 11 and the mud discharging pipe 12, and is provided from the ground side. Muddy water and earth and sand are prevented from entering the opening 24. The sealing member 23 is provided with a sliding contact flange 1 on the mating side even when the front body elements are slightly swung relative to each other.
The sliding contact flange 19 extends inward from the periphery of the sliding flange 19 so as not to shift outward.

FIG. 5 shows front body elements 3A, 3B and 3C.
Another coupling mechanism between them is shown. This coupling mechanism is composed of a groove member 25 having a U-shaped cross section. The front ends of the sliding contact flanges 19 slidingly contacting with the grooves 25a of the groove member 25 are fitted together. 19
This guides relative swing between the two. The groove member 25 is fixed to one of the sliding contact flanges 19 in sliding contact with a bolt 26 or the like. Therefore, this bolt 26
By loosening the groove member 25, the groove member 25 can be removed, so that the front trunk elements can be separated from each other. FIG. 2 shows both a connecting mechanism using the connecting pin 20 and a connecting mechanism using the groove member 25. Of course, either one may be provided.

With the above-described configuration, the excavator 1 can bend the plurality of front fuselage elements 3A, 3B, and 3C individually with respect to the rear fuselage in left and right arbitrary directions. The bending fulcrum at the time of bending is not on the center axis of the trunk, but is the rear end edge of the front trunk element on the bending side. This is, as shown in FIGS. 2 and 6,
This is because the front end of the rear trunk 4 is inserted and fitted inside the rear end of the front trunk 3 at the connection between the front trunk 3 and the rear trunk 4, and then connected by the center-folding jack 15 as described above. . Therefore, the skin plate 2 at the rear end of the front trunk 3
A gap T is provided between the sliding contact flange 7 and the front end portion 28a of the skin plate 28 of the rear body 4 so as to be inserted. Further, a seal member 29 for sealing between the facing outer surface of the skin plate 28 of the rear body 4 is provided extending around the entire inner surface of the skin plate 27 at the rear end of the front body 3. As a result, the front trunk element is
, The bent rear edge 27a of the skin plate 27 at the rear end of the front trunk element contacts the contact step 28b (FIGS. 2 and 6) of the skin plate 28 of the rear trunk 4, which is there. It becomes a bending fulcrum.

In the present invention, the bending fulcrum is not particularly limited to the upper side, the lower side, and both sides as described above. For example, the rear trunk 4, the uppermost front trunk element 3A, and the rear trunk 4
And the lowermost front torso element 3C and the front torso element are connected to each other by a so-called center bending pin (not shown). By arranging them on a straight line, the center bending pin may be used as a fulcrum to enable center bending.

FIG. 1 and FIG. 2 show the excavator 1 of this embodiment.
As shown in FIG. 2, auxiliary cutter disks 30 smaller in diameter than the main cutter disk 2 are arranged at the four corners on the front surface of the excavator 1 and substantially within a common tangent to the main cutter disk 2, respectively. The auxiliary cutter disk 30 is for excavating an unexcavated portion of the ground by the main cutter disk 2 and excavating a tunnel closer to a rectangle. Of course, the center bending, which is a feature of the present excavator 1, is also applied to an excavator that does not include the auxiliary cutter disk 30.

With the above arrangement, the three front trunk elements 3A, 3B and 3C can be individually swung with respect to the rear trunk 4 in different directions, for example, as shown in FIG. 7A, 7B and 7C, the upper part is a plan view and the lower part is a front view. In this figure, illustration of the auxiliary cutter disk 30 is omitted.

FIG. 7A shows three front body elements 3A, 3B,
3C is in a state of swinging in the same direction (rightward with respect to the paper surface). When digging in that state, the digging machine 1 curves rightward (in the direction of the arrow R) and advances due to the digging reaction force. Therefore, it is convenient when bending the excavation direction.

FIG. 7B shows that the front body element 3B at the center is not swung (the axial direction coincides with the rear body 4), and the front body elements 3A and 3C at the upper and lower ends are in opposite directions. Has been rocked. When excavating in that state, the excavator 1 excavates straight ahead (arrow F) while rotating in the direction of arrow G due to the excavation reaction force. Therefore, when there is a sign that the excavator 1 rotates around the axis for some reason during the excavation, it is convenient because a correction can be made.

FIG. 7 (c) shows a state in which the front trunk elements 3A, 3C at both ends are swung in the direction opposite to that of FIG. 7 (b), and the excavator 1 is rotated about its axis as shown in FIG. 7 (b). It is possible to excavate straight ahead (arrow F) while rotating in the H direction as opposed to that of.

As described above (FIGS. 7 (b) and 7 (c)), it is possible not only to rotate the trunk around its central axis, but also to rotate it while changing the excavation direction. That is, for example, as shown in FIG. 8 (a), while keeping only the lowermost front body element 3C straight, the center and uppermost front body elements 3B, 3A are moved rightward in FIG. When the excavator is rocked and excavated, the excavator 1 rotates in the arrow J direction while changing the excavation direction to the right (the direction of the arrow R). The rotation in this case tends to occur around the central axis of the lowermost front trunk element 3C. The same applies to the case where only the uppermost front body element 3A is swung rightward while the center and lowermost front body elements 3B and 3C are kept straight, and excavation is performed. Only the rotation and direction changes are made smaller.

Although the excavator 1 is vertically long in FIGS. 1 to 3 and FIG. 7, even if the excavator 1 is long in the horizontal direction, the same operation is achieved by the same excavation method. Further, in the above-described embodiment, three front body elements are connected, but the present invention is not particularly limited to three, and two or four or more may be connected.

[0037]

The excavator of the present invention can change the direction of excavation (in other words, curve excavation), and can also rotate a rectangular shield excavator around the excavation direction. Further, it is also possible to change the excavation direction while rotating. In addition, of the plurality of front fuselage elements, for example, without swinging the upper front body element, it is made parallel to the rear trunk axis direction, and by digging by swinging the lower front body element, It is also possible to rotate around the trunk axis of the front trunk element (the front trunk element that does not swing). Therefore, it is easy to correct the excavation direction and the inclination of the tunnel.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an excavator according to the present invention.

FIG. 2 is a side sectional view of the machine shown in FIG. 1;

FIG. 3 is a sectional view taken along line II-II of FIG. 2;

FIG. 4 is a partially cutaway perspective view showing a connecting mechanism and a sealing mechanism of the front bodies of the excavator of FIG. 1;

FIG. 5 is a partially cutaway perspective view showing another example of a coupling mechanism between the front trunks of the excavator shown in FIG. 1;

FIG. 6 is a schematic perspective view illustrating the fitting of the front trunk and the rear trunk.

FIG. 7 is an explanatory diagram showing a state in which the excavator of FIG. 1 is bent.

FIG. 8 is an explanatory view showing a state in which the excavator of FIG. 1 is bent.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Drilling machine 2 ... Main cutter disk 3 ... Front trunk 3A ... Front trunk element 3B ... Front trunk element 3C ... Front trunk element 4 ... Rear trunk 14 ... Propulsion jack 15 ··· Middle folding jack 19 ··················································································· Segment

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E21D 9/08 E21D 9/06 301

Claims (3)

(57) [Claims] 1. A plurality of front fuselage elements, each having a rectangular cross-section, each having a main cutter disc on the front face, connected in a row, and connected to said plurality of front fuselage elements by a plurality of center bending jacks. A rear fuselage having a cross-sectional shape substantially corresponding to a plurality of front fuselage elements, and a plurality of propulsion jacks for advancing the shield machine, and The plurality of front trunk elements are arranged along the inner peripheral edge of the trunk, and each of the plurality of front trunk elements is configured to swing around the fitting portion in a direction perpendicular to the column direction. The torso elements are integrally swingable in the row direction, and the adjacent front torso elements are in sliding contact with each other in sliding contact with each other, and are separated from each other by being pin-connected. Can swing independently The pin is fitted in a round hole formed in one of the adjacent front body elements and a guide long hole formed in a sliding flange of the other front body element. The adjacent front fuselage elements are in sliding contact with each other in sliding contact flanges, and the front end edges of the sliding contact flanges are fitted into guide groove members so that they can swing without being separated from each other. Wherein the groove member is attached to one of the front edges of the adjacent sliding flanges. 2. A plurality of front fuselage elements, each having a rectangular cross-section, each having a main cutter disc on the front face, connected in a row, and connected to said plurality of front fuselage elements by a plurality of center bending jacks. A rear fuselage having a cross-sectional shape substantially corresponding to a plurality of front fuselage elements, and a plurality of propulsion jacks for advancing the shield machine, and The plurality of front trunk elements are arranged along the inner peripheral edge of the trunk, and each of the plurality of front trunk elements is configured to swing around the fitting portion in a direction perpendicular to the column direction. The body elements are integrally rocked in the row direction, and the adjacent front body elements are in sliding contact with each other in a sliding contact flange, and the front edges of the sliding contact flanges are guide grooves. By being fitted to the members The groove member is attached to one of the front end edges of the adjacent sliding contact flanges, and one of the sliding contact flanges of the front body element that comes into sliding contact with each other. A rectangular shield machine in which an annular seal member is disposed on a contact surface. Wherein the front waist between elements, which are detachably connected to one another according to claim 1 or 2 rectangular shield machine according.