JP4089585B2 - Roller cutter device and excavating machine - Google Patents

Description

The present invention relates to a roller cutter device and an excavating machine that are attached to the tip of an excavating machine in order to excavate natural ground and the like.

  In general, a tunnel boring machine 100 (hereinafter referred to as “TBM”) as shown in FIG. 7 is used as an excavating machine for excavating and forming the entire cross section of a tunnel by mechanical excavation to a relatively stable ground such as a bedrock. .) Is used. The TBM 100 includes a front body portion 103 that includes a cutter head 101 having a large number of roller cutters 2, a front gripper 102 that protrudes outward and presses an outer peripheral ground, and slides relative to the front body portion 103. A rear torso part 105 provided with a main gripper 104 that is movably connected and protrudes outwardly and presses the outer peripheral ground, and a telescopic part that connects the rear torso part 105 and the front torso part 103 in a telescopic manner. The middle trunk portion 107 is provided with a jack 106, and the main gripper 104 of the rear trunk portion 105 is protruded to obtain a digging reaction force from the surrounding natural ground, while the expansion jack 106 is extended to expand the front trunk portion 103. The tunnel head 101 is used to dig a tunnel, and the front gripper 102 of the trunk portion 103 is projected to obtain a support reaction force from the surrounding ground, while the main grind of the rear barrel portion 105 is obtained. By repeating the step of drawing the rear body portion 105 to contract the retracted telescopic jack 106 the path 104, it is intended to continue to excavating a tunnel.

Various types of mechanisms for supporting the roller cutter are provided. For example, a roller cutter device including a roller cutter and a holder for attaching and replacing the roller cutter from the front (outside of the machine) of the TBM is provided. Yes. This roller cutter device fixes a mounted roller cutter by bolting a fixing member.
As another roller cutter device, in a state where the roller cutter is mounted on the TBM, an opening through which the holder inserts the roller cutter from the back of the TBM (inside the machine), and fixing means for fixing the inserted roller cutter from the back of the TBM, (For example, refer to Patent Document 1).

Further, as another roller cutter device, in a state where the roller cutter is mounted on the TBM, the holder has one opening portion in which the roller cutter can be inserted from the front side of the TBM and the other opening in which the roller cutter can be inserted from the rear side of the TBM. And a fixing means for mounting a roller cutter inserted from one opening or the other opening from the rear of the TBM is also provided (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 11-107683 (paragraph number 0021, FIG. 1) Japanese Patent Laid-Open No. 10-331587 (paragraph numbers 0009 to 0011, FIG. 1)

By the way, in the roller cutter device described above, the roller cutter is attached / detached from the outside of the TBM. However, when the roller cutter has to be replaced during excavation work, the operator goes out of the TBM and replaces it. Therefore, there is a problem that the replacement work becomes difficult.
In the roller cutter device described in Patent Document 1 described above, the roller cutter is attached and detached from the rear of the TBM. However, when the roller cutter is attached, it is necessary to perform from the narrow rear of the TBM. For this reason, the installation work behind the TBM is time consuming and burdens the operator, and there is a problem that work efficiency is poor.

  In the roller cutter device described in Patent Document 2, the roller cutter can be inserted from both the front and rear of the TBM. However, the roller cutter must be fixed from the rear of the TBM. As in the case 1, the mounting work behind the TBM is time-consuming and burdens the operator, so that there is a problem that work efficiency is poor.

The present invention has been made in view of such circumstances, and an object of the present invention is to enable the roller cutter to be inserted from the front and rear of the excavating machine and to fix the roller cutter from the front and rear of the excavating machine. Accordingly, it is an object of the present invention to provide a roller cutter device and an excavating machine that improve work efficiency.

In order to achieve the above object, the present invention proposes the following means.
The invention according to claim 1 is a roller cutter device that is disposed at the front end of an excavating machine and crushes the rock mass, and has a roller cutter having a roller blade that is rotatable around a support shaft, and a part of the roller blade is directed forward. A holder that holds both ends of the support shaft in an exposed state, and a first opening that allows the roller cutter to be inserted from the front, and the roller cutter to be inserted from the rear. A first fixing mechanism for removably fixing the roller cutter inserted from the first opening to the holder from the front, and the roller cutter inserted from the second opening to the rear A second fixing mechanism that is detachably fixed to the holder from the holder, and the support shaft is connected to a rotary support portion that rotatably supports the roller blade, and both ends of the rotary support portion. Fixed to The fixing portion of the support shaft is pressed and fixed to the support shaft by the first fixing member from the first opening side from the side of the first opening. The two adjacent surfaces are pressed and fixed to the holder by a second fixing member from the second opening side .

According to the roller cutter device according to the present invention, the roller cutter can be attached from both the front and the rear of the excavating machine, so that it is possible to perform an appropriate attachment operation according to the work situation. That is, when mounting the roller cutter for excavation preparation, the roller cutter is inserted from the first opening and fixed from the front by the first fixing mechanism. When exchanging the roller cutter during excavation work, after removing the roller cutter from the second opening on the rear side of the excavating machine, the roller cutter is removed from the second opening on the rear side of the excavating machine. And is fixed from behind by the second fixing mechanism.
The support shaft includes a rotation support portion and a fixing portion having a rectangular cross section, and the fixing portion presses and fixes two adjacent surfaces from the first opening side to the holder by the first fixing member. Since the two adjacent surfaces are pressed and fixed to the holder by the second fixing member, the roller cutter can be securely fixed by the holder.

The invention according to claim 2 has a rotating disk that is rotated around an axis along the excavation direction at the front end, and the holder in the roller cutter device according to claim 1 is fixed to the rotating disk by welding. It is characterized by that.
According to the excavating machine according to the present invention, since the holder is firmly fixed by being fixed to the tip of the rotating disk by welding, the holder does not rattle due to vibration during excavation work. Therefore, this excavating machine can improve the exchange work efficiency.

According to the roller cutter device and the excavating machine of the present invention, when exchanging the roller cutter before excavation work, the roller cutter is inserted from the first opening and fixed from the front of the excavating machine by the first fixing mechanism. Therefore, replacement work efficiency can be improved. In addition, when exchanging the roller cutter during excavation work, the roller cutter can be inserted from the second opening and fixed from the rear of the excavating machine by the second fixing mechanism, thus improving the exchanging work efficiency. Can be made.

Embodiments of the present invention will be described below with reference to the drawings.
In the embodiment described here, the roller cutter device according to the present invention is mounted on the TBM 100 shown in FIG. 7 and used.
As shown in FIGS. 1 and 4, the roller cutter device 1 includes a roller cutter 2, a holder 3 that supports the roller cutter 2, a first fixing mechanism 4, and a second fixing mechanism 5. Has been.

As shown in FIG. 2, the roller cutters 2, the roller blades 2a, is composed of a support shaft 2b to rotate freely via a bearing or the like (not shown) the roller blades 2a, the support shaft 2b, the roller The rotary bearing portion 2c is configured to be rotatable about the blade 2a, and a fixed portion 2d that is coaxially connected to both end faces of the rotary bearing portion 2c. As shown in FIG. 4, the fixed portion 2d has a substantially square cross section that is symmetric with respect to the symmetry axis O, and includes a contact surface 2e and a contact surface 2f.
As shown in FIG. 1, the holder 3 is composed of a pair of wall portions 6 disposed so that the wall surfaces 6 a face each other, and a pair of wall portions 7 that connect the pair of wall portions 6. 7 is fixed to the TBM 100 by welding. As shown in FIG. 3, the wall 6 of the holder 3 has a first opening 8 that opens toward the front (outside of the machine) side of the TBM 100 and a rear of the TBM 100 (inside the machine). A second opening 9 is formed.

The 1st opening part 8 and the 2nd opening part 9 are set as the structure penetrated in these opening part directions. The inner surface 8a of the first opening 8 includes a parallel surface 11 that is parallel to each other, an abutment surface 12 that is bent at a right angle from the parallel surface 11, and a first opening 8 to a second opening. 9 and an inclined surface 13 that gradually approaches the direction 9. A screw hole 14 is formed in the contact surface 12.
The inner surface 9a of the second opening 9 includes parallel surfaces 15 that are parallel to each other, an inclined surface 16 that is gradually spaced toward the first opening 8, and a second opening. 9 and an inclined surface 17 in which the distance gradually approaches in the direction of the first opening 8. A circular recess 18 is formed in the vicinity of the inclined surface 17, and a through-hole 19 that penetrates the inner surface 9 a of the second opening 9 and the circular recess 18 is formed in the inclined surface 17. A barrel nut 20 shown in FIG. 4 is inserted into the circular recess 18.

As shown in FIG. 4, the first fixing mechanism 4 includes a pressing member ( first fixing member ) 31 and a bolt 32. The pressing member 31 includes a contact surface 33 that is gradually spaced from the first opening 8 toward the second opening 9, and a direction from the first opening 8 toward the second opening 9. The contact surface 34 and the through-hole 35 that are gradually approaching each other are provided.
The second fixing mechanism 5 includes a pair of wedge members ( second fixing members ) 36 and a pair of bolts 37. The wedge member 36 has a substantially rectangular parallelepiped shape, and includes a contact surface 38 and a contact surface 39.

  When performing excavation work using the roller cutter device 1 having the above-described configuration, as shown in FIG. 7, while projecting the main gripper 104 of the rear trunk portion 105 of the TBM 100 and obtaining an excavation reaction force from the surrounding natural ground, A step of performing tunnel excavation work by the rotational force of the roller cutter 4 installed on the cutter head 101 of the front trunk section 103 by extending the telescopic jack 106, and a front ground gripper 102 of the front trunk section 103 to protrude from the outer periphery The tunnel is excavated and formed by repeating the process of retracting the main gripper 104 of the rear trunk 105 and contracting the telescopic jack 106 to draw the rear trunk 105 while obtaining the support reaction force.

Next, a method for assembling and removing the roller cutter from the outside of the TBM and a method for assembling and removing the roller cutter from the inside of the TBM in the roller cutter device having the above configuration will be described.
First, a method for assembling a roller cutter from the front of the TBM will be described. As shown in FIG. 5, the roller cutter 2 is inserted from the first opening 8 of the roller cutter device 1. At this time, since the wedge member 36 of the second fixing mechanism 5 on the second opening 9 side is fixed by the bolt 37, the contact surface 2e of the support shaft 2b contacts the contact surface 38. . Then, by inserting the pressing member 31 into the holder 3, the contact surface 33 contacts the contact surface 2 f of the support shaft 2 b, and the inclined surface 34 contacts the inclined surface 13. Then, the bolt 32 is inserted into the through hole 35 of the pressing member 31, and the bolt 32 that has passed through the through hole 35 is screwed into the screw hole 14 of the contact surface 12 and tightened, whereby the pressing member 31 is pressed and inserted. As shown in FIG. 4, the roller cutter 2 is pressed and fixed to the holder 3. Moreover, what is necessary is just to reverse the procedure mentioned above, when removing.

  Next, a method for assembling the roller cutter from behind the TBM will be described. As shown in FIG. 6, the roller cutter 2 is inserted from the second opening 9 of the roller cutter device 1. At this time, the holding member 31 of the first fixing mechanism 4 on the first opening 8 side is fixed by inserting the bolt 32 into the through hole 35 and screwing it into the screw hole 14. The contact surface 2 f of the shaft 2 b is in contact with the contact surface 33. Then, by inserting the wedge member 36 into the holder 3, the contact surface 38 contacts the contact surface 2 e of the support shaft 2 b and the contact surface 39 contacts the inclined surface 16. Here, since the distance between the contact surface 38 and the contact surface 39 is slightly wider on the rear end side than on the front end side, the effect of firmly pressing and fixing the support shaft 2b is obtained. Then, the bolt 37 passing through the through hole 19 is screwed into the barrel nut 20 inserted into the circular recess 18 and tightened, whereby the wedge member 36 is pressed and inserted. As shown in FIG. Is pressed and fixed to the holder 3. Moreover, what is necessary is just to reverse the procedure mentioned above, when removing.

  According to said structure, by using this roller cutter apparatus 1, the roller cutter 2 is attached from the 1st opening part 8 opened to the front of TBM100, and the 2nd opening part 9 opened to the back of TBM100. Since it can be removed, an appropriate mounting operation can be performed according to the application. That is, since the roller cutter 2 can be attached from the front during preparation for excavation, it is not necessary to perform the operation from the narrow TBM 100 machine, and the efficiency of the attachment work can be improved. Further, since the roller cutter 2 can be replaced during excavation work from the inside of the TBM 100, work efficiency can be improved.

Further, since the holder 3 is attached to the TBM 100 by welding, the holder 3 is firmly fixed to the excavating machine, so that the holder 3 does not rattle due to vibration during excavation work. Therefore, working efficiency can be improved.
Further, since the support shaft 2b is pressed and fixed by the contact surface 33 of the presser member 31 and the contact surface 38 of the wedge member 36, the roller cutter 2 is rattled due to vibration during excavation work. Therefore, the roller cutter 2 can be securely fixed.
In the above-described embodiment, the present invention is applied to the TBM 100. However, the present invention is not limited to this, and can be applied to, for example, a shield machine. Even with the above configuration, the same effect as the above-described embodiment can be obtained.

It is a front view which shows the roller cutter apparatus which concerns on one Embodiment of this invention. It is sectional drawing which looked at the roller cutter apparatus which concerns on one Embodiment of this invention from the AA surface of FIG. It is sectional drawing which looked at the roller cutter apparatus which concerns on one Embodiment of this invention from the BB surface of FIG. 2 in the state in which the roller cutter is not mounted | worn. It is the side view which looked at the roller cutter apparatus which concerns on one Embodiment of this invention from the BB surface of FIG. It is sectional drawing at the time of attaching a roller cutter from the excavation machine inner side of the roller cutter apparatus which concerns on one Embodiment of this invention. It is sectional drawing at the time of attaching a roller cutter from the excavation machine outer side of the roller cutter apparatus which concerns on one Embodiment of this invention. It is a side view of a tunnel boring machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller cutter apparatus 2 Roller cutter 2a Roller blade 2b Support shaft 3 Holder 4 1st fixing mechanism 5 2nd fixing mechanism 8 1st opening part 9 2nd opening part

Claims (2)

In the roller cutter device that is arranged at the front end of the excavating machine and crushes the rock mass,
A roller cutter having a roller blade rotatable around a support shaft;
A holder for holding both ends of the support shaft in a state where a part of the roller blade is exposed to the front,
The holder is provided with a first opening for allowing the roller cutter to be inserted from the front and a second opening for allowing the roller cutter to be inserted from the rear, and the holder is inserted from the first opening. A first fixing mechanism for removably fixing the roller cutter to the holder from the front, and a second fixing mechanism for removably fixing the roller cutter inserted from the second opening to the holder from the rear ,
The support shaft includes a rotation support portion that rotatably supports the roller blade, and a fixed portion having a rectangular cross section that is connected to both ends of the rotation support portion and fixed to the holder.
The fixing portion of the support shaft has its two adjacent surfaces pressed and fixed to the support shaft by the first fixing member from the first opening side, and the other two adjacent surfaces are the second opening portion. A roller cutter device that is pressed and fixed to the holder by a second fixing member from the side . An excavating machine having a rotating disk rotated about an axis along the excavation direction at a front end, and a holder in the roller cutter device according to claim 1 fixed to the rotating disk by welding.

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