JPH0240839B2 - TONNERUKUTSUSAKUKINOKATSUTADEISUKU - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cutter disk for a tunnel excavator, and more specifically, to a cutter disk for a tunnel excavator in which a roller cutter can be replaced from the excavator side of the cutter disk. It is related to disks.

[Conventional technology]

A cutter disk 1 of a hard rock tunnel excavator as shown in FIG. It is configured so that when it is rotationally driven via the ring gear 6 and the disk support 7, the front face 8 can be excavated.

Conventionally, this roller cutter 2 has a cutter face 1a of a cutter disk 1, as shown in FIG. 9a.
A mounting seat 3 is provided protrudingly on the face 8 side of the mounting seat 3.
A space 9 is formed in which the roller cutter 2 is mounted.

The mounting seat 3 is provided with a holding groove 3a into which a shaft bearing part 2a having a rectangular cross section as shown in FIG. , roller katsuta 2
can be firmly held on the cutter disk 1.

There is a built-in bearing (not shown) in the cutter ring 2b of the roller cutter 2 that is supported by the shaft in this manner, and when the cutter disk 1 rotates, the cutter ring 2b slides against the face 8, causing the cutter ring 2b to play loosely with respect to the roller cutter shaft 2c. It is now possible to move around.

[Problem to be solved by the invention]

In the above structure, the mounting seat opens only on the face side of the cutter disk, so the roller cutter cannot be replaced from the excavator side. To replace the roller cutter, move the cutter disk backward and remove the roller cutter from inside the excavator. At the same time as transporting to the face side, the worker must step between the face and the cutter ace, and carry out the work under conditions that could cause the face to collapse.

In addition, since this work is impossible in areas where the ground is in poor condition, there is the disadvantage that replacement work cannot be carried out unless supplementary measures such as injecting chemicals into the face make it stand on its own. .

The present invention was made in view of the above-mentioned problems, and its object is to provide a cutter for an excavator that allows the roller cutter to be replaced by the cutter disk safely from inside the excavator without the need for an operator to enter between the cutter disk and the face. The goal is to provide disks.

[Means to solve the problem]

In the present invention, since a roller cutter having a freely rotatable cutting ring for excavating a face is mounted on a cutter disk, a space is formed in which the roller cutter is attached, and both ends of the roller cutter shaft are sandwiched between the space. It is applied to a cutter disc of a tunnel excavator, which has a mounting seat in a suitable position, on which the shaft bearing part of the shaft is fixedly supported.

Its characteristics are as shown in Figure 1.
The fixed support part of the bearing part 16a in the mounting seat 13 has an insertion groove 17 through which each bearing part 16a of the roller cutter shaft 16 is inserted from the excavator side 14 toward the face side 15, and an insertion groove 17 that is connected to the insertion groove 17 and extends to the face side 15. An arcuate groove 18 open to the bottom is formed.

A rotary disk 22 that can be rotated by fitting into the arcuate groove 18 is disposed, and a part of the circumference of the rotary disk 22 has a U-shape for receiving the shaft bearing portion 16a inserted through the insertion groove 17. A shaped notch 21 is formed.

When the rotary disk 22 with the bearing part 16a fitted into the U-shaped notch 21 is rotated and the opening of the U-shaped notch 21 is shifted from the insertion groove 17, the bearing with the built-in rotary disk is removed. ,
When the cutter disk 1 rotates, the cutter ring 2b can freely rotate relative to the roller cutter shaft 2c by sliding with the face 8.

[Problem to be solved by the invention]

In the above structure, the mounting seat opens only on the face side of the cutter disk, so the roller cutter cannot be replaced from the excavator side. To replace the roller cutter, move the cutter disk backward and remove the roller cutter from inside the excavator. At the same time as transporting to the face side, the worker must step between the face and the cutter ace, and carry out the work under conditions that could cause the face to collapse.

In addition, since this work is impossible in areas where the ground is in poor condition, there is the disadvantage that replacement work cannot be carried out unless supplementary measures such as injecting chemicals into the face make it stand on its own. .

The present invention was made in view of the above-mentioned problems, and its object is to provide a cutter for an excavator that allows the roller cutter to be replaced by the cutter disk safely from inside the excavator without the need for an operator to enter between the cutter disk and the face. The goal is to provide disks.

[Means to solve the problem]

In the present invention, since a roller cutter having a freely rotatable cutting ring for excavating a face is mounted on a cutter disk, a space is formed in which the roller cutter is attached, and both ends of the roller cutter shaft are sandwiched between the space. It is applied to a cutter disc of a tunnel excavator, which has a mounting seat in a suitable position, on which the shaft bearing part of the shaft is fixedly supported.

Its characteristics are as shown in Figure 1.
The fixed support part of the bearing part 16a in the mounting seat 13 has an insertion groove 17 through which each bearing part 16a of the roller cutter shaft 16 is inserted from the excavator side 14 toward the face side 15, and an insertion groove 17 that is connected to the insertion groove 17 and extends to the face side 15. An arcuate groove 18 open to the bottom is formed.

A rotary disk 22 that can be rotated by fitting into the arcuate groove 18 is disposed, and a part of the circumference of the rotary disk 22 has a U-shape for receiving the shaft bearing portion 16a inserted through the insertion groove 17. A shaped notch 21 is formed.

The rotary disk 22 with the shaft bearing part 16a fitted into the U-shaped notch 21 is rotated so that the opening of the U-shaped notch 21 is shifted from the insertion groove 17, and the rotary disk 22 is pressed against the outer peripheral surface of the rotary disk 22. A pressing member 24 for fixing the rotary disk 22 to the mounting seat 13 is arranged on the facing face side of the arcuate groove 18. A fastening member 25 is provided for fixing or releasing the fixing of the pressing member 24 by operation from the excavator side 14 of the mounting seat 13.

The fastening member 25 is loosened from inside the excavator 14, the pressing member 24 is released from the rotary disk 22, and the rotary disk 22 is rotated.
The rotor cutter 12 can be replaced from the excavator side 14 by putting the character-shaped notch 21 in communication with the insertion groove 17 (see FIG. 7) and inserting and removing the shaft bearing part 16 through the insertion groove 17. This is what I did.

〔Example〕

The present invention will be explained in detail below based on examples thereof.

FIG. 1 is a diagram showing how a roller cutter 12 is mounted on a cutter disk 1 of a tunnel excavator according to the present invention.

Roller cutter 1 is placed in the appropriate place on cutter disk 1.
A plurality of mounting seats 13 of No. 2 are attached (one seat is shown). The roller cutter shaft 16 of the roller cutter 12 has rectangular shaft bearings 1 at both ends thereof.
6a is formed, but the fixed support part of the shaft bearing part 16a in the mounting seat 13 has an excavator side 14
In order to insert each bearing part 16a of the roller cutter shaft 16 from the side toward the face side 15,
an insertion groove 17 having a slightly wider width than the width L of a, and a face side 15 which is continuous with the insertion groove 17 and has a diameter larger than the width of this insertion groove 17 and guides the rotation of a rotary disk 22 to be described later. A wide insertion groove 20 with a circular arc groove 18 opened at the top and a step surface 19 provided as necessary on the end face of the circular groove 18.
are successively provided so that their respective center lines coincide.

A rotary disk 22 that can be fitted into the arcuate groove 18 and rotated is disposed therein, and a part of the circumference of the rotary disk 22 is provided with the shaft bearing portion 16a inserted through the insertion groove 17. A U-shaped notch 21 is formed to receive the. A spacer 23, which also functions as a pressing member 24 to be described later, is fitted outside the shaft bearing part 16a fitted in the U-shaped notch 21 so that its outer periphery coincides with that of the rotary disk 22. ing.

On the other hand, on the opposite side of the arcuate groove 18 opened on the face side 15, a shaft bearing portion 16a is provided in the U-shaped notch 21.
The rotary disk 22 fitted with the spacer is rotated so that the opening of the U-shaped notch 21 is shifted from the insertion groove 17, and the spacer is pressed against the outer peripheral surfaces of the rotary disk 22 and the spacer 23 and fixed in the insertion groove 20. A pressing member 24 into which the portion 24a fits and fixes the rotary disk 22 to the mounting seat 13 is disposed. This pressing member 24 is provided with a screw hole 26 for a bolt 25, which is a fastening member for fixing to the mounting seat 13, and is inserted from the excavator side 14 of the mounting seat 13. By tightening or loosening the bolt 25 from the excavator side 14, the pressing member 24 can be fixed to or released from the rotary disk 22.

Note that this pressing member 24 is for preventing the roller cutter shaft 16 shown in FIG. 24a
(See FIG. 1) may be fixed so as to protrude from the face side 15.

The roller cutter 12 fixed in this way
As shown in FIG.
The cutter disk 1 is configured such that at least one cutter disk 1 is attached along with the cutter disk 8 on each circumference of the same radius so that the excavation locus is approximately equally spaced, and the entire surface of the face 8 can be excavated evenly.

As shown in FIG. 2, the cutting ring 12a of the roller cutter 12 has a radial roller 30 and a thrust roller 31 interposed between rings 29, 29 fitted around the outer periphery of the roller cutter shaft 16 and between the roller cutter shaft 16. and seal 32
The spacer 33 is fixed onto an outer fitting ring 34 which is fitted around the outer periphery of the outer ring 34, with a spacer 33 interposed therebetween. The outer fitting ring 34 is prevented from displacing in the axial direction by a ring-shaped threaded body 35, and can freely rotate around the fixed roller cutter shaft 16 as described later.

When the roller cutter 12 is attached to and removed from the mounting seat 13, the rotary disk 2 is placed between the roller cutter shaft 16 and its bearing portion 16a.
A rotation shaft 16b (see FIG. 4) is provided for rotation together with 2. This rotating portion 16b is
As shown in the figure, it may be hexagonal, it may be a cut circle with some straight lines (not shown), or it may have a recessed part.In short, it may be a shape that can be rotated by an operator with a tool. Bye.

Note that the shape of the shaft bearing portion 16a is not limited to the rectangular cross section as described above, but may be circular in cross section, although some slippage may occur within the rotary disk 22. Furthermore, the rotary disk 22
The center 16c of the shaft bearing 16a that fits into the U-shaped notch 21 may be aligned with the rotation center 22a of the rotary disk 22 as shown in FIG. , the center 16c is located on the face side 15 or the excavator side 14 from the rotation center 22a.
It may be displaced to . In this case, if necessary, as shown in FIG.
Providing a protruding stopper 36 that comes into contact with the contact surface 16d has the advantage of further improving prevention of rotation after being fixed to the shaft bearing 16a.

Furthermore, as shown in FIGS. 6a and 6b, a slit 37 is provided in the rotary disk 22 and a spring 38 is provided to connect the divided rotary disk 22 to each other.
By providing this, the U-shaped notch 21 can be opened wide as shown by the imaginary line. In this case, it becomes easier to fit the shaft bearing part 16a, and the U-shaped notch 21 narrows when it is fixed with the bolt 25 (see FIG. 1), so that the shaft bearing part 16a is more firmly attached.
can hold a.

According to the above configuration, the bolt 25, which is a fastening member, is loosened from the excavator side 14, and the pressing member 24
By releasing the pressure contact with the rotary disk 22 and rotating the rotary disk 22, bringing the U-shaped notch 21 and the insertion groove 17 into communication, and inserting and removing the shaft bearing part 16a through the insertion groove 17, The rotor cutter 2 can be replaced from the excavator side 14. The details are described below.

First, a case will be described in which the roller cutter 12 in the installed state as shown in FIG. 1 is removed.

An operator loosens the bolts 25 of the mounting seat 13 fixed to the cutter disk 1 from the excavator side 14, and moves the pressing member 24 slightly in the direction of the arrow 39.

Next, when a tool is inserted into the space 9 shown in FIG. 2 and the rotating part 16b is turned 180 degrees in the direction of the arrow 40 shown in FIG.
The rotary disk 22 interposed between the two rotates together with the shaft bearing portion 16a having a rectangular cross section as shown in FIG.

Note that if the center 16c of the bearing portion 16a is eccentric as shown in FIG. 5, the roller cutter 12 swings and rotates about the rotation center 22a as shown by the imaginary line in FIG. do.

At this time, if the stopper 36 is provided in a protruding manner, the contact surface 16d is separated from the stopper 36, so that the roller cutter shaft 16 can be rotated without any problem.

When the U-shaped notch 21 matches the insertion groove 17 of the mounting seat 13 as shown in FIG. 7, the roller cutter 12 is pulled toward the excavator side 14, and the spacer
At the same time, the roller cutter 12 can be removed from the mounting seat 13.

Next, when mounting the roller cutter 12 on the mounting seat 13, the shaft bearing portion 16a is inserted into the insertion groove 17, and then fitted into the U-shaped cutout portion 21 of the rotary disk 22. At this time, if the U-shaped notch 21 of the rotary disk 22 has a wide opening as shown by the imaginary lines in FIGS. 6a and 6b, it can be easily fitted. And the shaft bearing part 16a
Insert the spacer 23 from behind and rotate the rotating part 16b.
Turn it 180 degrees in the opposite direction and position it again as shown in Figure 1.

When the pressing member 24 is provided with a stopper 36, it is attached to the contact surface 16 of the rotating portion 16b.
When the bolt 25 is tightened after contacting the rotary disk 22 and the spacer 2, the pressing member 24
3, and the roller cutter shaft 16 is fixed to the mounting seat 13. At this time, the slit 37
If a spring 38 is provided in contact, the fixation will be stronger. By the way, shaft bearing part 1
6a is fitted onto the rotary disk 22, and when the shaft bearing portion 16a is securely fixed only by the pressing member 24, it is necessary to interpose the above-mentioned spacer 25 that constitutes a part of the pressing member 24. The roller cutter 12 mounted in this manner is rotated by rollers 30, 31, etc. shown in FIG. 2, and the face 8 can be excavated by rotation of the cutter disk 1. Note that the reaction force of the roller cutter 12 that acts during excavation is always in a fixed direction, so simply by providing the stopper 36 on the side that receives the reaction force, the abutting surface 16d can be separated from the stopper 36 during excavation. Never.

〔Effect of the invention〕

As explained in detail above, in the present invention, an insertion groove of the shaft bearing part and an arcuate groove continuous to this insertion groove are provided from the excavator side of the mounting seat toward the face side, and a circular arc groove is provided in a part of the circumference. A rotary disk having a U-shaped notch and fitting into the arcuate groove, a pressing member that presses the rotary disk, and a fastening member that can fix and release the pressing member to the mounting seat from the excavator side. Therefore, the rotor cutter can be safely and easily replaced from the excavator side without an operator entering between the cutter disk and the face.

[Brief explanation of drawings]

Figure 1 is a partially enlarged sectional view of the cutter disk with a roller cutter attached, Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a front view of the cutter disk with a roller cutter attached, and Figure 4 is the shaft bearing. FIG. 5 is an installation diagram when the shaft bearing part is fitted eccentrically to the rotary disk, FIGS. 6 a and b are different embodiments of the rotary disk, and FIG.
The figure is an explanatory diagram for removing the roller cutter shaft, Figure 8 is a diagram of how the cutter disc of a hard rock tunnel excavator is installed, Figure 9a is a diagram of the conventional installation of the roller cutter on the cutter disc, and Figure 9b is the same as that of figure a. −
It is a line arrow view. 1...Katsuta disk, 9...Space part, 12...
...roller cutter, 12a...cutting ring, 13
... Mounting seat, 14 ... Excavator side, 15 ... Face side, 16 ... Roller cutter shaft, 16a ... Bearing part, 16b ... Rotating part, 16c ... Center, 16d
...Abutting surface, 17...Insertion groove, 18...Circular groove,
21... U-shaped notch, 22... Rotary disk, 22a... Rotation center, 24... Pressing member, 2
5... Fastening member (bolt), 36... Stopper.

Claims (1)

[Scope of Claims] 1. In order to mount a roller cutter on which a freely rotatable cutter ring for excavating a face is fitted onto the cutter disk, a space is formed in which the roller cutter is attached, and the roller cutter is mounted across the space. In a cutter disk for a tunnel excavator, which has a mounting seat at a suitable location on which the shaft bearings at both ends of the shaft are fixedly supported, the fixed support part of the shaft bearing on the mounting seat has:
An insertion groove into which each bearing part of the roller cutter shaft is inserted is formed from the excavator side toward the face side, and an arcuate groove that is open on the face side and connected to the insertion groove, and can be rotated by fitting into the arcuate groove. A rotary disk is provided, and a U-shaped notch is formed in a part of the circumference of the rotary disk to receive the shaft bearing inserted through the insertion groove. A pressing member that fixes the rotary disk to the mounting seat by rotating the rotary disk into which the shaft bearing part is fitted so that the opening of the U-shaped notch is displaced from the insertion groove, and presses against the outer peripheral surface of the rotary disk. is arranged on the opposing face side of the arcuate groove, and a fastening member is provided for fixing or releasing the fixing member by operating the pressing member from the excavator side of the mounting seat, and the fastening member is installed from the excavator side. The pressing member is released from the rotary disk, the rotary disk is rotated, the U-shaped notch and the insertion groove are brought into communication, and the shaft bearing portion is moved in and out through the insertion groove. A cutter disk for a tunnel excavator, characterized in that the roller cutter can be replaced from the machine side. 2. The center of the shaft bearing part that fits into the U-shaped notch of the rotary disk is arranged to be displaced from the rotation center of the rotary disk, and the contact surface of the rotation part of the roller cutter is on the roller cutter side of the pressing member. 2. The cutter disk for a tunnel excavator according to claim 1, further comprising a protruding stopper that comes into contact with the cutter disk.