JP3899587B2 - 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]
As a roller cutter supporting device of such a shield machine, there are devices as shown in FIGS. That is, a substantially disc-shaped cutter frame 2 is provided on the front surface of the shield machine main body 1 so as to be rotationally driven by an internal driving device (not shown). The cutter frame 2 is configured by fixing roller bits 5 and 6 radially. The roller bit 5 is disposed at the corner portion of the cutter frame 2, and the disk-shaped roller cutter 3 is rotatably held by the holder 4, and the roller bit 6 is disposed at the front surface portion of the cutter frame 2. In other words, a disk-shaped roller cutter 7 is rotatably held by a holder. In the figure, 9 is a teeth bit. FIG. 12 is a cross-sectional view taken along a plane including the roller bit 5 and including the rotation axis of the cutter frame 2, and the roller bit 5 is disposed obliquely corresponding to the corner of the cutter frame 2.
[0003]
As shown in FIG. 13, the protrusion 4a formed on the holder 4 is brought into contact with the receiving member 11 fixed to the cutter frame 2 by welding or the like, and the bolt 12 is attached to the holder 4 from the holder 4 side. The roller bit 5 is fixed to the cutter frame 2 side by being inserted into a through hole 4b formed in the projecting portion 4a of 4 and screwed into a screw hole 11a formed in the receiving seat member 11.
[0004]
By the way, when constructing a curved part of a tunnel with a conventional shield machine, it is necessary to construct an extra dig inside the curved part so that the shield machine can bend along the curved part.・ Because it is difficult to penetrate the copy / overcutter with boulders, when the construction of the curved part is planned, the outer diameter of the roller cutter 5 of the roller bit 5 provided at the corner of the cutter frame 2 is increased. The excavation is started in a state in which an object is attached in advance and the amount of overhang of the roller cutter 3 is increased.
[0005]
On the other hand, as a conventional shield machine, the outer diameter of the roller cutter is the same for the construction of the straight part and the curved part, and the roller bit can be moved outward by a hydraulic jack. There is. In some cases, the roller cutter is overhanged by a hydraulic jack during the construction of the curved portion so as to perform extra digging.
[0006]
[Problems to be solved by the invention]
However, from the holder 4 side, the bolt 12 is inserted into the through hole 4b formed in the protruding portion 4a of the holder 4 and screwed into the screw hole 11a formed in the receiving member 11, so that the roller bit 5 is moved to the roller frame 2 side. In the case of fixing, the load applied to the roller bit 5 during excavation (for example, shearing force or tensile force) acts directly on the bolt, causing breakage or loosening of the bolt. The inconvenience of not becoming frequent occurs.
[0007]
Further, in the case where the roller cutter 3 of the roller bit 5 provided at the corner portion is mounted in advance with a large outer diameter and excavation is started with the amount of the roller cutter 3 protruding from the cutter frame 2 being increased, Since extra digging is performed including the straight portion, there are problems that the amount of excavated soil increases and tunnel meandering easily occurs. Furthermore, there is also a problem that the roller cutter 3 is worn before construction of the curved portion is started.
[0008]
In addition, if the cutter has the same outer diameter for straight and curved sections, and the cutter is extended by a hydraulic jack when installing the curved section, a large space is required for the placement of the hydraulic jack. Thus, the moving mechanism of the roller bit becomes complicated, and the load during excavation directly acts on the moving mechanism, so the structure must be able to withstand this load.
[0009]
The present invention has been made in view of the above circumstances, and prevents breakage of the fasteners by preventing the load acting on the roller bit from acting on the fasteners such as bolts. Only when installing, the roller bit can be moved to the outside for extra digging, reducing the amount of excavated soil, preventing meandering of the tunnel, minimizing wear on the cutter, and large It is an object of the present invention to provide a roller cutter support device for a shield machine that requires no space and can have a simple structure.
[0010]
[Means for Solving the Problems]
A roller cutter support device for a shield machine according to the present invention includes a cutter frame that is rotatably attached to the front surface of a shield machine main body, and a roller cutter that is attached to the cutter frame via a holder. in the roller cutter support device, the cutter frame, the conjunction holder is provided mount block of the inner and outer mounted from the working face side along the radial direction, a gap portion shape formed between these inner and outer mounting blocks The holder is placed on one of the inner and outer placement blocks, the holder is fixed to the placement block via the positioning member, and the positioning member is fitted into the gap portion and placed. It is characterized by being fixed to the block .
[0011]
The positioning member includes a Turkey which having a protruding portion fitted in the gap portion is preferred.
[0012]
It is preferable that the protrusion is provided eccentric to the positioning member.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a shield machine according to an embodiment of the present invention will be described with reference to the accompanying drawings. The overall structure of this shield machine is almost the same as the conventional one shown in FIG.
[0014]
As shown in FIGS. 1 and 2, the shield machine has a cutter frame 20 attached to the front surface of the shield machine main body so as to be rotationally driven, and a disk-shaped roller cutter 31 that is rotatably held by a holder 32. The roller bit 30, the roller bit 30 is movable in the direction along the cutter frame 20 and is detachably attached, and the holder 32 of the roller bit 30 and the roller bit support 40 are connected to each other. A positioning member 50 for pressing the combined roller bit 30 against the roller bit support portion 40 and a fastener (bolt) 60 for fixing the positioning member 50 to the roller bit support portion 40 are schematically configured. FIG. 1 shows a case where the roller bit 30 is positioned inside, and FIG. 2 shows a case where the roller bit 30 is positioned outside.
[0015]
The cutter frame 20 includes a plate-like frame 21 having substantially the same diameter as the outer diameter of the shield machine main body, and a spoke frame 22 arranged in the radial direction through the center of the frame 21.
[0016]
The roller bit 30 is configured as follows.
[0017]
That is, the holder 32 has a so-called frame shape in which two side plates 34 and 35 are provided in parallel and the side plates 34 and 35 are connected by two parallel side plates 36 and 37. Both ends of the side plates 34 and 35 are protruding portions 34 a and 35 a that protrude from the outer surfaces of the side plates 36 and 37.
[0018]
The roller cutter 31 is configured such that a cemented carbide tip is embedded in the peripheral portion or a cutting edge member subjected to quenching is fixed. Two roller cutters 31 are arranged with their side surfaces in contact with each other. A shaft 33 is loosely inserted into shaft holes (not shown) formed in each, and the shaft 33 is both supported by grooves 34b and 35b formed in the side plates 34 and 35 (note that 35b is not visible in the figure). It is held so that it cannot rotate in the state. The shaft pressing members 38 and 39 are fixed to the upper surface of the shaft 33 so as to sandwich the shaft 33.
[0019]
The roller bit support portion 40 includes side plates 41, 42 arranged so as to be continuous with the spoke frame 22, a partition plate 43 provided integrally with the side plates 41, 42 and the boundary portion of the spoke frame 22, and the side plate 41. , 42 and a side plate 44 fixed to the outer end portion.
[0020]
Two mounting blocks 45 and 46 on which projecting portions 34a and 35a formed on the side plates 34 and 35 of the roller bit 30 are mounted are fixed to the inner surfaces of the side plates 41 and 42 by welding or the like. One mounting block 45 is disposed with its outer end in close contact with the inner surface of the side plate 44, and its inner end is disposed with a gap 47 between the other mounting block 46. The gap 47 is formed larger than the thickness dimension of the protrusions 34 a and 35 a of the holder 32. The other mounting block 46 is arranged with a gap 48 between its inner end and the partition plate 43. Similarly to the gap 47, the gap 48 is formed larger than the thickness dimension of the protrusions 34 a and 35 a of the holder 32. The width dimension of each mounting block 45, 46 is set to be the same as or slightly smaller than the distance between the inner surfaces of the projecting portions 34a, 35a. Further, the distance between the outer surfaces of the mounting block 46 and the mounting block 47 fixed to the opposing side plates 41 and 42 is set to be substantially the same or slightly smaller than the distance between the outer surfaces of the side plates 36 and 37 of the roller bit 30. Yes. The mounting blocks 45 and 46 are respectively formed with through holes 45a and 46a into which the fasteners 60 are inserted.
[0021]
The positioning member 50 includes a main body 50b having a width dimension substantially the same as or slightly smaller than the gap between the inner surfaces of the protrusions 34a and 35a formed on the side plates 34 and 35 of the holder 32, and the upper end of the main body 50b in the figure. And a protruding portion 50c formed integrally in the vicinity of the corner of the lower end of the main body portion 50b. Two screw holes 50d into which a fastener 60 such as a bolt is screwed are formed in a lower end portion of the main body portion 50b but not the protruding portion 50c.
[0022]
The main body 50b can be inserted between the protrusions 34a and 35a. The protrusion 50a has substantially the same width as the distance between the outer surfaces of the side plates 34 and 35, and the protrusion 34a. , 35a. The protruding portion 50 c has a width dimension substantially the same as the width dimension of the gap 47 and can be inserted into the gap 47.
[0023]
The positioning member 50 restricts the holder 32 of the roller bit 30 to the cutter frame 20 at a plurality of positions.
[0024]
Next, the usage method and operation of the roller bit support device of the present embodiment will be described. 3 to 10 are sectional views cut along a plane parallel to the side plates 41 and 42 and including the through holes 45a and 46a of the mounting blocks 45 and 46. FIG.
[0025]
FIG. 3 shows a state in which the roller bit 30 is disposed at the position of the inner portion of the roller bit support portion 40, and shows a state in which the shield machine implements the straight portion of the tunnel. That is, the protruding portion 50 c of the positioning member 50 is inserted into the gap 47 between the mounting blocks 45 and 46, and the main body portion 50 b is inserted between the protruding portions 34 a and 35 a of the holder 32. Is placed in contact with the upper surface of the protrusions 34a, 35a in the figure. Then, the fastener 60 is inserted into the through hole 46 a formed in the mounting block 46, and the fastener 60 is screwed into the screw hole 50 d formed in the positioning member 50. As a result, the roller bit 30 is fixed to the roller bit support portion 40 via the positioning member 50.
[0026]
When constructing the curved portion of the tunnel, the roller bit 30 is positioned on the outer portion of the roller bit support portion 40 according to the following procedure, and extra digging is performed around the shield machine.
[0027]
That is, as shown in FIG. 4, the fastener 60 is loosened and removed, and the positioning member 50 is pushed out in the direction in which the protruding portion 50 c is removed from the gap 47 (front side of the shield machine).
[0028]
As shown in FIG. 5, the roller bit 30 is moved together with the positioning member 50 in the inner direction (a direction in FIG. 5).
[0029]
As shown in FIG. 6, the roller bit 30 is moved in the inner direction of the shield machine (direction B in the figure) and is extracted from the roller bit support portion 40. At this time, the dimension between the protrusions 34a and 35a of the holder 32 is formed larger than the width dimension of the mounting block 46, and the dimension between the side plates 36 and 37 is larger than the distance dimension between the opposing mounting blocks 46. The holder 32 is not counted as the mounting blocks 45, 46, etc., and its movement is not restricted at all and can be extracted through the mounting block 46. The roller bit 30 is held by hand or held by a holding mechanism.
[0030]
As shown in FIG. 7, the positioning member 50 is inverted so that the protruding portion 50c is located on the opposite side to FIG. At this time, a bit of a rock drill is inserted from the gap between the side plates 41 and 42 to form a space where the roller bit 30 protrudes over the ground on the side of the shield machine.
[0031]
As shown in FIG. 8, the held roller bit 30 is moved from the inside of the shield machine to the outside direction (c direction in the figure) through the gaps 47 and 48 so as to straddle the mounting block 46. To do.
[0032]
As shown in FIG. 9, the roller bit 30 is moved together with the positioning member 50 to the outside of the shield machine (in the direction D in the figure) so that the protruding portion 50 c of the positioning member 50 faces the gap 47.
[0033]
As shown in FIG. 10, the positioning member 50 is moved to the inside of the shield machine (in the direction of “e” in the figure), and the protruding portion 50 c is inserted into the gap 47. Then, the fastener 60 is inserted into the through hole 45a formed in the mounting block 45 and screwed into the screw hole 50d formed in the positioning member 50, whereby the roller bit 30 is rolled through the positioning member 50. Fix to the bit support 40. As a result, the roller 31 of the roller bit 30 is disposed outward from the position in FIG. 3 (the position of the two-dot chain line in FIG. 10). If the shield machine is advanced in this state, the bit 30 can be dug further.
[0034]
According to the shield machine of the present embodiment, the positioning member 50 can be positioned by inserting the protruding portion 50 c of the positioning member 50 into the gap 47 between the mounting block 45 and the mounting block 46. By inverting the positioning member 50 and inserting it into the gap 47, the positioning member 50 can be positioned at the outer position and the inner position. Here, since the main body portion 50b of the positioning member 50 is just fitted between the protrusions 34a and 35a of the holder 32, the roller bit 30 pressed and fixed by the positioning member 50 is positioned between the outer position and the inner portion. Is positioned in the opposite direction.
[0035]
In the present embodiment, the side surface of the protruding portion 50c and the side surfaces of the mounting blocks 45 and 46 are in contact with each other in a plane, so that the plane becomes an external force receiving portion for the load acting on the roller bit 30 during excavation. The acting load force acting can be greatly reduced.
[0036]
Further, since the holder 32 of the roller bit 30 is mounted on the mounting blocks 45 and 46, a load acting on the roller bit 30 is received by the mounting blocks 45 and 46, and a tensile force is generated in the fastener 60. This can be greatly reduced.
[0037]
In this way, since the bending force and tensile force acting on the fastener 60 can be greatly reduced, the fastener 60 is prevented from being broken or loosened.
[0038]
Further, since the main body 50b of the positioning member 50 is just fitted between the protrusions 34a and 35a of the holder 32, the inner surface of the protrusions 34a and 35a of the holder 32 and the main body 50b of the positioning member 50 are used. Close contact with the side. Even if a load is applied to the roller bit 30 during excavation, no play occurs between the positioning member 50 and the holder 32, and the roller bit 30 can be reliably held by the positioning member 50.
[0039]
In the present embodiment, since the positioning member 50 is inverted and used, it is not necessary to prepare a plurality of positioning members for positioning, and parts management and the like can be simplified.
[0040]
The mounting block in which the distance between the inner surfaces of the protrusions 34a and 35a of the holder 32 is slightly larger than the width of the mounting blocks 45 and 46, and the distance between the outer surfaces of the side plates 36 and 37 of the holder 32 is opposed. Since the holder 32 is moved along the mounting blocks 45 and 46 and the mounting block 46 is positioned between the projecting portions 34a and 35a, the roller bit 30 is formed. Together with the holder 32 can be extracted inside the mounting block 46. Similarly, the roller bit 30 and the holder 32 can be inserted into the outside of the placement block 45 from the inside of the placement block 45. As described above, in the shield machine of the present embodiment, the roller bit 30 can be inserted and removed from the inside thereof, so it is not necessary to manually excavate the bedrock in front of the shield machine when replacing the roller bit 30. The replacement work of the roller bit 30 can be performed very easily.
[0041]
In the present embodiment, one positioning member 50 is inverted and used. However, a plurality of positioning members 50 that engage with the roller bit 30 and regulate the roller bit 30 at a plurality of positions are prepared. Then, each positioning member 50 may be appropriately selected and engaged with the roller bit support portion 40 to change the position of the roller bit 30.
[0042]
【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 bit from acting on the fastener such as a bolt and to construct a curved portion only. Roller bit can be moved to the outside for extra digging, reducing the amount of excavated soil, preventing meandering of the tunnel, minimizing cutter wear, and without requiring large space Also, the structure can be simple.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a roller cutter support device of a shield machine according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a roller cutter support device of a shield machine according to an embodiment of the present invention.
FIG. 3 is a process diagram showing a method of use and operation of the roller cutter support device of FIGS. 1 and 2;
4 is a process diagram showing a method of use and operation of the roller cutter support device of FIGS. 1 and 2. FIG.
FIG. 5 is a process diagram showing the method of use and operation of the roller cutter support device of FIGS. 1 and 2;
6 is a process diagram showing a method of use and operation of the roller cutter support device of FIGS. 1 and 2. FIG.
7 is a process diagram showing a method of use and operation of the roller cutter support device of FIGS. 1 and 2. FIG.
FIG. 8 is a process diagram showing a method of use and operation of the roller cutter support device of FIGS. 1 and 2;
9 is a process diagram showing a method of use and operation of the roller cutter support device of FIGS. 1 and 2. FIG.
10 is a process diagram showing a method of use and operation of the roller cutter support device of FIGS. 1 and 2. FIG.
FIG. 11 is a perspective view showing a conventional shield machine.
FIG. 12 is a partial cross-sectional view of a conventional shield machine.
FIG. 13 is a partial cross-sectional view of a conventional shield machine.
[Explanation of symbols]
20 Cutter frame 31 Roller cutter 32 Holder 45, 46 Placement block 50 Positioning member 50c Protrusion 60 Fastener

Claims (3)

In a roller cutter support device of a shield machine having a cutter frame that is rotatably attached to the front surface of the shield machine and a roller cutter that is attached to the cutter frame via a holder, the cutter frame includes: the holder with the mount block of the internal and external attached from the working face side is provided along the radial direction, a gap portion is made form between these inner and outer mounting block, said holder, either of the inner and outer mounting blocks The holder is fixed to the mounting block via the positioning member, and the positioning member is fitted to the gap and fixed to the mounting block. Roller cutter support device for shield machine. The positioning member is a roller cutter supporting unit of the shield machine 請 Motomeko 1 wherein that having a protruding portion fitted in the gap portion.   The roller cutter support device for a shield machine according to claim 2, wherein the protrusion is provided eccentric to the positioning member.

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