JPH11280384A - Roller-cutter fixture for shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller-cutter fixture for a shield machine, by which the replacing works of a roller cutter is facilitated while excavation reaction is not applied to a saddle-mounting bolt and the replacing works of the roller cutter are carried out even from both the inside and the outside of the shield machine. SOLUTION: The positioning of a part of a cutter case 21 on the rear side of a saddle 22 to a facing S is aimed at. The roller-cutter fixture for the shield machine has the cutter case 21 with saddle supporting sections 25 formed at the corner sections of a lower opening section 27, the saddle 22 being supported to the saddle supporting sections 25 while being moved from the saddle supporting sections 25 and capable of being removed to the outside of the cuter case 21, and a pair of bearings 23 installed to the saddle 22, a roller cutter 8 is faced into an upper opening section 27 and the lower opening section 27, and the roller cutter 8 is supported rotatably to the bearings 23 in both side face sections of the cutter at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller cutter mounting device for a shield machine, and more particularly, to a roller cutter for a shield machine capable of easily and safely replacing the roller cutter from inside and outside of the shield machine. It relates to a mounting device.

[0002]

2. Description of the Related Art A conventional shield excavator and its roller cutter mounting device will be briefly described with reference to FIGS. FIG. 10 is a schematic sectional view of the shield machine 1. The shield machine 1 includes a shield machine body 2, a cutter head 3, and a cutter driving motor 4.
, Bulkhead (partition) 5 and screw conveyor 6
And the cutter head 3 faces the face S.

FIG. 11 shows a face S of a cutter head 3 portion.
FIG. 3 is a front view as seen from the side, in which a plurality of roller cutters 8 are attached to a beam 7 of the cutter head 3. The cutter head 3 is rotationally driven by the cutter driving motor 4, and the roller cutter 8 cuts the face S, and the cutter between the cutter head 3 and the bulk head (partition wall) 5 from the sediment inlet 9 between the beams 7. The earth and sand is taken into the chamber 10, and the screw conveyor 6 discharges the earth and sand outside the machine.

FIG. 12 is a side view showing the mounting device 11 for the roller cutter 8, and FIG.
Is a cross-sectional view of the same, and the mounting device 11 of the roller cutter 8 includes a cutter case 12, a saddle 13, a bearing 14, and a pair of roller cutters 8.
The saddle 13 is attached to the cutter case 12 by saddle mounting bolts 15. The bearing 14 is attached to the saddle 13 by a bearing attachment bolt 16 and rotatably supports the roller cutter 8.

In the shield machine 1 having such a configuration, the roller cutter 8 of the cutter head 3 comes into contact with the face S at a predetermined pressure, so that the pressure (excavation reaction force F) applied to the roller cutter 8 is reduced by the bearing 14. And acts as a pulling force on the saddle mounting bolt 15 via the saddle 13. Therefore, there is a problem that the saddle mounting bolt 15 is likely to be stretched, loosened or broken.

[0006] Many methods have been devised to address this problem. For example, JP-B-6-1037, JP-A-7-180488, JP-A-7-269292,
Japanese Utility Model Publication No. 7-35917. However, each of the configurations has problems such as a large number of parts, an increase in cost and complexity of machining, and the work of replacing the roller cutter 8 itself requires rotating its support receiving material. There is a problem that it is inferior.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to provide a roller cutter mounting device for a shield excavator in which a roller cutter can easily be replaced.

It is another object of the present invention to provide a roller cutter mounting device for a shield machine capable of improving durability of a saddle mounting bolt by preventing excavation reaction force from being applied thereto.

Another object of the present invention is to provide a roller cutter mounting device of a shield machine in which a reaction force is applied to a cutter case.

Another object of the present invention is to provide a roller cutter mounting device for a shield excavator, which allows a roller cutter to be replaced from both inside and outside of the shield excavator (cutter head).

[0011]

SUMMARY OF THE INVENTION The present invention is directed to a cutter having a portion of a cutter case located behind a saddle with respect to a face, and a cutter which is capable of removing the saddle from the cutter case to the inside of a shield machine. This is a device that attaches a roller cutter to a cutter head of a shield excavator, which focuses on devising the shape of a case (formation of a saddle support portion). A cutter case having an upper opening and a lower opening, and having a saddle support formed at a corner of the lower opening; and supporting the saddle support in the cutter case and supporting the saddle. The saddle that can be removed from the cutter case by moving it from the A pair of bearings to be attached, wherein the roller cutter faces the upper opening and the lower opening, and rotatably supports the bearings on the bearings on both side surfaces of the cutter. Is a roller cutter mounting device for the machine.

In the lower opening of the cutter case,
A roller cutter housing portion and a saddle housing portion are formed, and the bearing can be attached to the saddle housing portion.

In the lower opening of the cutter case,
While forming a roller cutter storage part and a saddle storage part, the saddle can be detachable from the saddle support part toward the roller cutter storage part from the saddle storage part.

The saddle can be attached to the cutter head by a saddle mounting bolt operable from the inside of the machine, and the bearing can be attached to the saddle by a bearing mounting bolt operable from the inside of the machine.

The saddle allows the saddle to move from the saddle support to the inside of the cutter case, and the roller cutter and the bearing integrally
The shield excavator may be removable inside the machine.

In the roller cutter mounting device of the shield machine according to the present invention, the saddle is supported by the saddle supporting portion formed at the corner of the cutter case, and the saddle is moved from the saddle supporting portion and is moved out of the machine. Because it is removable, the excavation reaction force from the face acts on the bearing, saddle, and cutter case from the roller cutter. Therefore, the excavation reaction force from the face does not act on the saddle mounting bolt for attaching the saddle to the cutter case, and the saddle mounting bolt does not expand, loosen or break.

When replacing the roller cutter, work from the face side, that is, to remove the roller cutter outside the shield machine, if the bearing mounting bolt is removed, the roller cutter can be easily removed outside the machine together with the bearing. . Also, when removing the roller cutter in the shield machine (cutter chamber), remove the saddle mounting bolt and the bearing mounting bolt, and first move the saddle from the saddle support to the inside of the cutter case, for example. Then, the roller cutter can be removed together with the bearing from the lower opening of the cutter case to the lower side (inside the machine) of the cutter case. Therefore,
Without any special parts, the shape of the cutter case and the structure of the corresponding saddle and bearing reduce the cost, easily and safely, and remove the roller cutter both inside and outside the shield machine. Also can be attached.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a roller cutter mounting device 20 of a shield machine according to an embodiment of the present invention will be described with reference to FIGS. However, the same parts as those in FIGS. 10 to 14 are denoted by the same reference numerals, and the detailed description thereof will be omitted. FIG. 1 is a cross-sectional view of the roller cutter mounting device 20 of the shield machine in a direction perpendicular to the rotation axis of the roller cutter 8, FIG. 2 is a cross-sectional view along the rotation axis, and FIG. The shield cutter machine roller cutter mounting device 20 includes a cutter case 21
, Saddle 22, bearing 23, roller cutter 8
And

FIG. 4 is a plan view of the cutter case 21. The cutter case 21 includes a case body 24 having a square or rectangular cross section and four inward corners of the lower part of the case body 24. And a saddle supporting portion 25 having a predetermined area protruded and formed.

Accordingly, the cutter case 21 has an upper opening 26 (FIG. 1) having a square or rectangular shape, and a lower opening 27 (FIG. 4) has a central (in the figure) vertical roller cutter housing. 27A and a pair of left and right saddle housing portions 27B. That is, the cutter case 2
1, a pair of roller cutters 8 are rotatably accommodated in a space above the roller cutter accommodating portion 27A, and a part of the roller cutters 8 protrudes from the upper opening 26 toward the face S.

As shown in FIG. 2, the lower edge of the roller cutter 8 must be located above the upper surface of the saddle 22. This is because it is necessary to move the saddle 22 inside the cutter case 21 when removing the saddle 22 from the cutter case 21. That is, the saddle 22 can be positioned in the saddle housing portion 27B, and the saddle 22 can be moved from the saddle support portion 25 in the direction of the roller cutter housing portion 27A. Further, the bearing 23 supports the rotating shaft 8A of the roller cutter 8, has a flat mounting surface with respect to the saddle 22, and mounts it on the upper portion of the saddle 22.
This means that it is located above the saddle accommodating portion 27B. The saddle 22 has an inner wall surface 24 of the case body 24.
A saddle moving tap hole 28 is formed so as to penetrate in the lateral direction toward A (FIG. 4).

In particular, as shown in FIG. 1, a saddle 22 is supported by a saddle support portion 25 of a cutter case 21 and fixed by saddle mounting bolts 15. Further, the bearing 23 is supported by the saddle 22 and fixed by the bearing mounting bolt 16.

In the roller cutter mounting device 20 of the shield machine having such a configuration, the load (digging reaction force F) applied from the face S to the roller cutter 8 side is transmitted to the bearings 23 on both sides via the rotating shaft 8A. Further, it is transmitted from the bearing 23 to the cutter case 21 (saddle support portion 25) via the saddle 22 for supporting the same. Therefore, no tensile force is applied directly to the saddle mounting bolts 15 and the bearing mounting bolts 16, and their elongation, loosening, and breakage are unlikely to occur. Further, since the number of the roller cutters is small and small, the time required for the replacement work can be shortened, and the roller cutter mounting device 20 can be downsized, and the maximum number of roller cutters 8 can be mounted on the surface area of the cutter head 3. This makes it possible to improve the excavating ability of the shield excavator 1.

Next, based on FIGS. 5 and 6, the roller cutter 8 is moved out of the shield machine 1 (face S side).
The case where the roller cutter 8 is removed inside the shield excavator 1 (on the side of the cutter chamber 10) will be described with reference to FIGS. However, in each figure, (1) is a cross-sectional view along the rotation axis 8A of the roller cutter 8, and (2) is a cross-sectional view in a direction perpendicular to the rotation axis 8A. FIG. 5 is a sectional view showing a state in which the bearing mounting bolt 16 has been removed. As shown in the drawing, only the bearing mounting bolt 16 is removed while the saddle mounting bolt 15 is left as it is.

FIG. 6 shows the roller cutter 8 with the bearing 23.
5 is a cross-sectional view of the state in which the roller cutter 8 is easily removed while the saddle 22 remains fixed to the cutter case 21. The replacement part is also reversed. It can be installed by operating procedure.

FIG. 7 is a cross-sectional view showing a state where both the saddle mounting bolt 15 and the bearing mounting bolt 16 are removed, FIG. 8 is a cross-sectional view showing an operation of removing the saddle 22, and FIG. 9 is a roller cutter 8 and a bearing. It is sectional drawing which shows the removal operation of 23. As shown in FIG. 7, if the saddle mounting bolt 15 and the bearing mounting bolt 16 are respectively removed, as shown in FIG. 8, the saddle 22 is moved from the saddle support portion 25 and further from the lower opening 27 of the cutter case 21 into the cutter chamber 10. Can be removed.

That is, first, a tap bolt (not shown) is engaged with the saddle moving tap hole 28 of the saddle 22 from the roller cutter accommodating portion 27A side of the lower opening 27, and the tap bolt is inserted into the inner wall surface 24A of the case main body 24. If the screw is advanced with the leading end abutting, the saddle 22 moves from the saddle accommodating portion 27B to the roller cutter accommodating portion 27A due to the reaction force from the inner wall surface 24A, and as shown in FIG. Can be taken out into the cutter chamber 10 from the lower opening 27 of the cutter chamber.

Next, as shown in FIG. 9, the suspension bolt 29 is engaged with the bearing 23 and can be pulled out together with the roller cutter 8 into the cutter chamber 10. When installing a new roller cutter 8, the operation may be performed in the reverse order of the above.

[0029]

As described above, according to the present invention, the saddle is supported by the saddle support at the corner of the cutter case, so that the saddle mounting bolt and the bearing mounting bolt are pulled as excavation reaction force from the face. Since no load is applied, the reliability of the saddle mounting bolt and the bearing mounting bolt is improved, and the saddle can be reduced in size and weight. Furthermore, the number of parts is small, the replacement work of the roller cutter is easy, and the work can be performed from both inside and outside of the shield machine.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a roller cutter mounting device 20 of a shield machine in a direction perpendicular to the rotation axis of a roller cutter 8 according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along a rotation axis.

FIG. 3 is a plan view of the same.

FIG. 4 is a plan view of the cutter case 21;

FIG. 5 is a cross-sectional view showing a state where a bearing mounting bolt 16 is removed.

FIG. 6 is a cross-sectional view showing a state where the roller cutter 8 and the bearing 23 have been removed outside the machine through the upper opening 26;

FIG. 7 is a sectional view showing a state where both the saddle mounting bolt 15 and the bearing mounting bolt 16 are removed.

FIG. 8 is a sectional view showing an operation of removing the saddle 22.

FIG. 9 is a cross-sectional view showing an operation of removing the roller cutter 8 and the bearing 23.

FIG. 10 is a schematic sectional view of a conventional shield machine 1;

FIG. 11 is a front view of the cutter head 3 viewed from the face S side.

FIG. 12 is a side view showing the mounting device 11 for the roller cutter 8;

FIG. 13 is a plan view of the same.

FIG. 14 is a sectional view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shield excavator (FIG. 10) 2 Shield machine main body 3 Cutter head 4 Cutter driving motor 5 Bulkhead (partition) 6 Screw conveyor 7 Beam 8 Roller cutter 8A Rotation axis of roller cutter 8 (FIG. 2) 9 Between beams 7 Sediment intake 10 Cutter chamber 11 Mounting device for roller cutter 8 (FIG. 12) 12 Cutter case 13 Saddle 14 Bearing 15 Saddle mounting bolt 16 Bearing mounting bolt 20 Roller cutter mounting device for shield machine (embodiment, FIG. 1) 21 Cutter case 22 Saddle 23 Bearing 24 Case main body of cutter case 21 A Inner wall surface of case main body 25 Saddle support of cutter case 21 26 Upper opening of cutter case 21 27 Lower opening of cutter case 21 27A Roller cutter housing portion of lower opening 27 27B Saddle housing portion of lower opening 27 28 Saddle moving tap hole 29 Hanging bolt S Face F Face excavation reaction force from face S

Claims (5)

[Claims] 1. A shield cutter machine roller cutter mounting device for mounting a roller cutter on a shield machine cutter head, wherein the shield cutter machine is fixed to the cutter head and has an upper opening and a lower opening formed therein. A cutter case having a saddle support formed at a corner of the lower opening; and a saddle that is supported by the saddle support in the cutter case and that can be removed from the cutter case by being moved from the saddle support. A pair of bearings attached to the saddle, wherein the roller cutter faces the upper opening and the lower opening, and rotatably supports the bearing on the bearing on both side surfaces of the cutter. Roller cutter mounting device for shield machine. 2. A roller cutter accommodating portion and a saddle accommodating portion are formed in the lower opening portion of the cutter case, and the bearing is mounted in accordance with the saddle accommodating portion. A roller cutter mounting device for the shield machine according to claim 1. 3. A roller cutter accommodating portion and a saddle accommodating portion are formed in the lower opening of the cutter case, and the saddle is provided from the saddle supporting portion toward the roller cutter accommodating portion from the saddle accommodating portion. 2. The apparatus according to claim 1, wherein said roller cutter is detachable. 4. The method according to claim 1, wherein the saddle is mounted on the cutter head by a saddle mounting bolt operable from the inside of the machine, and the bearing is mounted on the saddle by a bearing mounting bolt operable from the inside of the machine. The roller cutter mounting device for a shield machine according to claim 1, wherein 5. The saddle allows the saddle to be moved from the saddle support portion to the inside of the cutter case, and the roller cutter and the bearing are integrally removable from the shield excavator. The apparatus according to claim 1, wherein the roller cutter is attached to a shield machine.