JP3944948B2 - Roller cutter support device for shield machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roller cutter support device for a shield machine for supporting a roller cutter provided on a shield machine, particularly a shield machine for rock and boulders, on a support frame.
[0002]
[Prior art]
A roller cutter support device for such a shield machine (hereinafter simply referred to as a roller cutter support device unless otherwise specified) is formed on a receiving member provided on a cutter frame on a holder for holding the roller cutter. The projecting part is abutted from the anti-cut face side, the bolt is inserted into the through hole formed in the projecting part of the holder from the anti-cut face side, and screwed into the screw hole formed in the receiving member, and the holder is attached to the cutter frame side. To be fixed to.
[0003]
[Problems to be solved by the invention]
However, in the conventional roller cutter support device, since the bolt is inserted into the through hole of the holder from the opposite face side and screwed into the screw hole formed in the receiving member, the holder is fixed to the roller frame. Loads (for example, shearing force and tensile force) applied to the roller cutter during excavation directly act on the bolt, causing breakage or loosening of the bolt, and inconvenience that excavation must be temporarily stopped for repair. .
[0004]
The present invention has been made in view of the above circumstances, and is capable of preventing breakage of a fastener by preventing a load acting on a roller cutter from acting properly on a fastener such as a bolt. An object of the present invention is to provide a roller cutter support device for a machine.
[0005]
[Means for Solving the Problems]
The roller cutter supporting device for a shield machine according to the present invention is a roller for a shield machine for supporting a holder for holding a roller cutter between two spoke frames of a cutter frame provided on the front surface of the shield machine main body. In the cutter support device, a mounting block is provided on each of the two spoke frames, a gap is formed between the mounting blocks, and a first taper for positioning the holder on both mounting blocks is provided. On the other hand, the holder is formed with a support portion that is flat in the radial direction of the roller cutter and passes through the gap, and positioned at both ends of the support portion in contact with the first tapered surface. A second tapered surface is formed, and after moving the support portion from the anti-face side to the face side through the gap, the holder is -The entire cutter is rotated about its axis of rotation, and the second taper surfaces at both ends of the support portion are seated so that they abut against the first taper surface of the placement block, and the support portion engages with the placement block. The mounting block is provided with a fixing member for fixing the holder from the opposite face side , and the support portions are formed on the holders on both sides of the roller cutter, and are placed on the spoke frame corresponding to the support portions. A block is provided, and a mounting plate straddling between the mounting blocks is provided on the opposite face side of the mounting block facing, and the fixing member fixes the support member on the mounting block through the mounting plate. Features.
[0007]
Two opposing side plates are fixed between the two spoke frames, a mounting block is provided on each of the spoke frames between the side plates, and a protruding disc portion is formed on the axial end surface of the support portion. The side plate is formed with a groove portion for engaging and guiding the disc portion when the support portion is moved from the face side to the anti-face face side or from the anti-face face side to the face side. that it is preferable.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a roller cutter support device (hereinafter referred to as a roller cutter support device unless otherwise specified) of a shield machine according to an embodiment of the present invention will be described with reference to the accompanying drawings.
[0009]
As shown in FIG. 1, the roller cutter support device of the present embodiment supports a roller cutter 21 held by a holder 20 on a cutter frame 10 provided on the front surface of a shield machine main body.
[0010]
The cutter frame 10 includes two spoke frames 11 opposed to each other in the radial direction on the front surface of the shield machine, and a reinforcing member for preventing the spoke frame 11 from opening between the spoke frames 11. 12 is fixed by welding or the like at a predetermined distance in the length direction.
[0011]
In addition, two side plates 13 which are adjacent to the reinforcing member 12 and face each other are fixed to the spoke frame 11 by welding or the like. On the inner surface of the side plate 13, a groove portion 13a extending in the vertical direction in the figure is formed. Columnar support members 14 are respectively fixed to the side plate 13 and the spoke frame 11 by welding or the like at the corners of the space surrounded by the side plate 13 and the spoke frame 11. A mounting block 15 having a tapered surface 15a (which constitutes the first tapered surface of the present invention) is fixed to each support member 14 by welding. Further, a gap 16 is formed between the front ends of the mounting blocks 15 facing each other. On the lower surface of the mounting block 15, a through hole 15b penetrating the tapered surface 15a is formed.
[0012]
2 and 3, the holder 20 includes a cylindrical member 22 that holds a roller cutter 21 in which a carbide tip is embedded at the tip, and a shaft member 24 that supports the cylindrical member 21 via a bearing 23. The shaft member 24 includes a support member 26 fixed to the end portion of the shaft member 24 with a bolt 25.
[0013]
The support member 26 includes a disk portion 26a that fits into the end portion of the shaft member 24 and the cylindrical member 22, a support portion 26b that is connected to the disk portion 26a and is flattened in the radial direction of the roller cutter, and the support portion 26b. And a disk part 26c provided continuously.
[0014]
The support portion 26b is a hexagonal column having a flat cross-sectional shape perpendicular to the axis. Each surface 26d, 26e, 26f, 26g, 26h, 26i of the hexagonal column is as follows. The surface 26d and the surface 26g are substantially parallel, and the surface 26e and the surface 26i constitute a second tapered surface of the present invention, and are inclined so as to contact the tapered surfaces 15a of the mounting blocks 15 facing each other. An angle is set. The surface 26f connects the surface 26e and the surface 26g, and the surface 26h connects the surface 26i and the surface 26g. As shown in FIG. 1, screw holes 26j into which bolts (corresponding to the fixing member of the present invention) 27 are screwed are formed in the surface 26e and the surface 26i, respectively.
[0015]
FIG. 4 shows a state where the roller cutter 21 is attached to the spoke frame 11. The support portions 26b formed at both ends of the holder 20 are disposed between the opposing mounting blocks 15 fixed to the support member 14, and the surfaces 26e and 26i of the support portion 26 are formed on the tapered surfaces 15a of the mounting block 15. It is placed on the placement block 15 in close contact. A mounting plate 30 is arranged on the lower surface of the mounting block 15 in the figure, and bolts 27 are inserted into the through holes 30a formed in the mounting plate 30 from the lower side in the figure, and further through holes formed in the mounting block 15 It is inserted into 15b and screwed into a screw hole 26j formed in the support portion 26b. Thereby, the roller cutter 21 is fixed to the spoke frame 11 side via the holder 20.
[0016]
Next, the operation of the roller cutter support device of this embodiment will be described.
[0017]
As shown in FIG. 4, since the inclined surfaces 26 e and 26 i of the support portion 26 b of the holder 20 are placed in close contact with the tapered surface 15 of the placement block 15, the roller cutter 21 faces the roller cutter 21 during excavation. Even if a load to be pushed into is applied, the load is mainly supported by the mounting block 15 and the support member 14 and hardly acts on the bolt 27. Therefore, problems such as breakage and loosening of the bolt 27 do not occur.
[0018]
Further, the roller cutter 21 can be easily positioned by bringing the surfaces 26e, 26i of the support portion 26b into contact with the tapered surface 15a of the mounting block 15. Moreover, even when a load perpendicular to the pushing direction is applied to the roller cutter 21 during excavation, the tapered surface 15a serves as a pressure receiving surface, so that it can withstand a large load.
[0019]
Since the load transmission is performed by the surfaces 26e and 26i of the support portion 26b and the tapered surface 15a of the mounting block 15, the load transmission mechanism becomes simple.
[0020]
Further, since the mounting plate 30 is attached so as to connect the opposing mounting blocks 15, the mounting plate 30 increases the rigidity of the mounting block 15 and a load is applied to the roller cutter 21 during excavation. The deflection of the mounting block 15 can be minimized. Therefore, deformation and breakage of the mounting block 15 can be prevented, and the holder 20 can be prevented from falling off.
[0021]
When it becomes necessary to replace the roller cutter 21 due to wear of the roller cutter 21 or the like, the roller cutter 21 can be replaced in a short time with a simple operation as shown in FIGS. .
[0022]
That is, first, the shield machine is moved backward to form a space between the roller cutter 21 and the face. And in the state shown in FIG. 4, the volt | bolt 27 is loosened and the volt | bolt 27 and the attachment plate 30 are removed.
[0023]
Next, as shown in FIG. 5, the roller cutter 21 is pushed forward together with the holder 20. As a result, the support portion 26 b of the holder 20 is separated from the tapered surface 15 a of the mounting block 15. At this time, the disc part 26c is guided in the groove part 13a formed in the side plate 13 (see FIG. 1).
[0024]
Next, as shown in FIG. 6, the roller cutter 21 is rotated together with the holder 20 about its rotation axis. As a result, the support portion 26 b of the holder 20 rotates while the disc portion 26 c is positioned in the groove portion 13 a of the side plate 13. Since the roller cutter 21 is pushed forward, there is a gap between the support portion 26b and the mounting block 15, and the support portion 26 can be rotated without interfering with the tapered surface 15a of the mounting block 15.
[0025]
Further, when the roller cutter 21 is rotated, the state shown in FIG. 7 is obtained. In this state, when the roller cutter 21 is moved together with the holder 20 to the inside of the shield machine (counter face side), the distance between the surface 26d and the surface 26g of the support portion 26b of the holder 20 (short width dimension of the present invention) is Since it is smaller than the gap 16 formed between the mounting blocks 15, the holder 20 can be moved to the inside of the shield machine without interfering with the mounting blocks 15. Thereby, the roller cutter 21 can be pulled out together with the holder 20. Then, it is replaced with a new roller cutter 21 held by the holder 20, and the holder 20 is placed on the placement block 15 and fixed by the bolts 27 and the mounting plate 30 in the reverse procedure to the above.
[0026]
Next, a roller cutter support device according to another embodiment of the present invention will be described with reference to FIG. Note that the same components as those in the above-described embodiment will be described with the same reference numerals.
[0027]
That is, in place of the through hole 15b formed in the mounting block 15 in the above embodiment, a screw hole 15c passing from the lower surface of the mounting block 15 to the middle of the mounting block 15 is formed, and the support portion 26b of the holder 20 is formed. A threaded hole 26k is formed on the surface 26d of the support portion 26b. Further, a protruding member 31 that contacts the surface 26d of the support portion 26b is fixed to the central portion of the mounting plate 30 disposed on the lower surface of the mounting block 15, and a through hole corresponding to the screw hole 26k is formed in the protruding member 31. Is formed.
[0028]
Similarly to the above-described embodiment, the support portion 26b of the holder 20 is placed on the tapered surface 15a of the placement block 15, and the mounting plate 30 is disposed on the lower surface of the placement block 15 in the drawing. Then, a bolt (corresponding to a fixing member of the present invention) 28 is screwed into a screw hole 26k formed in the support portion 26b by inserting the bolt 28 into the through hole 30a of the mounting plate 30 and the through hole of the protruding member 31. To do. As a result, the holder 20 is held by the mounting block 15. Further, the bolt 27 is inserted into the through hole 30 a of the mounting plate 30 and screwed into the screw hole 15 c of the mounting block 15. Thereby, the mounting plate 30 is fixed to the mounting block 15.
[0029]
In this embodiment, the holder 20 is held on the mounting block 15 side by the bolt 28, but the mounting of the bolt 27 is auxiliary, and the mounting plate 30 is fixed to the mounting block 15 by the bolt 27. Therefore, it can be prevented that the mounting plate 30 moves during excavation and the holder 20 falls off the mounting block 15.
[0030]
In this embodiment, a gap is formed between the width dimension of the protruding member 31 fixed to the mounting plate 30 and the front end surface of the mounting block 15. However, if the width dimension is the same as or slightly smaller than the distance between the front end surfaces of the mounting block 15 so that no gap is formed between the front end surfaces, the positioning operation and holding of the tapered surface 15a and the surfaces 26e and 26i are maintained. The effect can be complemented.
[0031]
Further, the protruding member 31 may be provided integrally with the support portion 26b instead of the mounting plate 30. However, in this case, it is necessary to set the short width dimension of the support portion 26 b including the thickness of the protruding member 31 to be smaller than the distance between the front end surfaces of the mounting block 15.
[0032]
【The invention's effect】
As described above, in the present invention, it is possible to prevent breakage of the fastener by preventing the load acting on the roller cutter from acting on the fastener such as a bolt.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a roller cutter support device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the holder shown in FIG.
FIG. 3 is a side view of FIG. 2;
4 is a process diagram showing a method of use and operation of the roller cutter support device of FIG. 1. FIG.
FIG. 5 is a process diagram showing a method of use and operation of the roller cutter support device of FIG. 1;
6 is a process diagram showing a method of use and operation of the roller cutter support device of FIG. 1. FIG.
7 is a process diagram showing a method of using the roller cutter support device of FIG. 1 and its operation. FIG.
FIG. 8 is a view showing a roller cutter support device according to another embodiment of the present invention.
[Explanation of symbols]
11 Spoke frame (cutter frame)
14 support member 15 mounting block 15a taper surface (first taper surface)
16 Gap 20 Holder 21 Roller cutter 26b Support portions 26e, 26i surface (second taper surface)
27, 28 bolt (fixing member)

Claims (2)

In the roller cutter support device of a shield machine for supporting a holder for holding a roller cutter between two spoke frames of a cutter frame provided on the front surface of the shield machine, in the two spoke frames, Each mounting block is provided, a gap is formed between the mounting blocks, and a first tapered surface for positioning the holder is formed on both mounting blocks, and the holder has a roller cutter. A support portion that is flattened substantially in the radial direction and that passes through the gap is formed, and second tapered surfaces for positioning in contact with the first taper surface are formed at both ends of the support portion. After moving the support part from the opposite face side to the face side through the gap, the holder is rotated together with the roller cutter about its rotational axis. Further, the second taper surfaces at both ends of the support portion are seated so as to contact the first taper surface of the placement block, the support portion is engaged with the placement block, and the holder is attached to the placement block. A fixing member for fixing from the opposite face side is provided, and the support part is formed on the holders on both sides of the roller cutter, and a mounting block is provided on the spoke frame corresponding to the support part. A roller cutter support device for a shield machine, wherein a mounting plate straddling between the mounting blocks is provided on the opposite face side, and the fixing member fixes the support member on the mounting block through the mounting plate . Two opposing side plates are fixed between the two spoke frames, a mounting block is provided on each of the spoke frames between the side plates, and a protruding disc portion is formed on the axial end surface of the support portion. The side plate is formed with a groove portion for engaging and guiding the disc portion when the support portion is moved from the face side to the anti-face face side or from the anti-face face side to the face side. roller cutter support device according to claim 1, wherein the shield machine that.

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