JP3991879B2 - Drilling tool mounting saddle and mounting mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an excavation tool mounting saddle for mounting excavation tools such as a roller cutter and a shield cutter used for excavation of a tunnel or the like to an excavating machine such as a shield machine, and an attachment mechanism using the excavation tool mounting saddle.
[0002]
[Prior art]
Generally, excavation work using a drilling machine such as a shield machine is performed by attaching a drilling tool adapted to the geology to the tip of a rotating disk arranged at the tip of a drilling machine such as a shield machine. A cutter is used, and a shield cutter is used in soft ground. As a mounting mechanism for such a drilling tool, when wear or damage occurs, the drilling tool can be pulled from the inside of the drilling machine without pulling the drilling machine out of the tunnel or entering between the face of the tunnel and the drilling machine. An attachment mechanism that can be easily exchanged by removing is used. Further, when excavating a ground in which a hard ground and a soft ground exist, an excavating machine provided with a roller cutter and a shield cutter is used.
[0003]
However, in the excavating machine provided with the roller cutter and the shield cutter in this way, for example, when excavating soft ground, there is a problem that the roller cutter is difficult to rotate, causing uneven wear on the roller cutter. There has been proposed an excavating machine using an excavating tool mounting mechanism that can exchange the shield cutter with each other. This excavation tool mounting mechanism is configured such that when the shield cutter is mounted, the support member is accommodated inside the cutter holder body, and the base of the shield cutter is accommodated inside the support member. The member is fastened with bolts, and the support member and the shield cutter are fastened with bolts to attach the shield cutter. When the roller cutter is mounted, the roller cutter bearing member is attached to the cutter holder main body by bolting. (For example, refer to Patent Document 1.)
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-68292 (FIGS. 2 and 7)
[0005]
[Problems to be solved by the invention]
By the way, in the excavation tool mounting mechanism, in order to mount the shield cutter, the dimension between the opposed inner wall surface of the cutter holder body and the width of the support member, and the thickness between the opposed inner wall surface of the support member and the base of the shield cutter. However, in order to be able to accommodate without looseness, it must be processed with high accuracy. If the processing accuracy is poor, There has been a problem that the shield cutter is rattled due to vibration or the like, the bolts being fastened are broken, and the shield cutter falls off. Further, since the roller cutter is mounted with bolts, the bolts may be loosened due to vibration, and the roller cutter may fall off. As a result, not only the excavation efficiency is deteriorated, but also the excavating machine may be damaged by the shield cutter or the roller cutter that has dropped off.
[0006]
The present invention has been made under such a background, and provides a saddle and an attachment mechanism of an excavation tool in which a roller cutter and a shield cutter are interchangeable with each other and both can be firmly attached. It is an object.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention proposes the following means.
The excavation tool mounting saddle according to the present invention is mounted on the front end surface of a rotating disk disposed at the front end of the excavating machine and is inserted into an excavating tool of a different type that is inserted from an opening that opens inside the excavating machine. However, the mounting saddle of the excavation tool that can be attached to each other includes a pair of wall portions for fixing the excavation tool, and the inner side surfaces of the fixing recesses provided on the opposing wall surfaces of the wall portions are is open in the insertion direction behind the drilling tool, a pair of tapered surfaces which gradually spread distance therebetween from the opening portion in the insertion direction forwardly possess the inner surface is an inner surface of the fixing recess, the tapered surface Further, a pair of contact surfaces are provided which are located further forward in the insertion direction and gradually reduce the distance from each other forward in the insertion direction .
[0008]
In the excavation tool mounting saddle according to the present invention, the pair of tapered surfaces and the contact surface are provided on the side surfaces of the fixed recesses provided facing each other on the opposite wall surfaces of the wall portion. The excavation tool inserted from the opening opening inside the excavating machine is fixed by the effect and the contact surface . As a result, the excavation tool does not rattle due to vibrations during excavation work and the tapered surface receives an excavation load, so that even if a bolt is used for fixing work, for example, the bolt is prevented from being loaded. By fixing using the tapered surface in this way, different types of excavation tools can be firmly fixed. As a result, the excavation tool is prevented from falling off, so that it is possible to prevent the excavation efficiency from being lowered and the excavation machine from being damaged.
[0009]
Further, the attachment mechanism according to the present invention is a roller cutter in which a roller blade rotates around a support shaft on which the excavation tool is installed between the wall portions , and the taper surfaces are separated from each other by an angle formed by the contact surfaces. The angle formed is set small, and the roller cutter is fixed by pressing the support shaft against the contact surface and pressing and inserting a wedge member between the support shaft and each tapered surface. Features.
[0010]
In the attachment mechanism of the present invention, the roller cutter is fixed by bringing the support shaft of the roller cutter into contact with the contact surface and pressing the wedge member between the support shaft and the taper surface. The support shaft is fixed by the wedge effect caused by the member. In other words, the angle between the contact surface and the taper surface is set so that the space between the contact surface and the taper surface facing each other is gradually narrowed forward in the insertion direction of the wedge member, and the side surface of the wedge member is adjusted to this angle. Since it is formed, a wedge effect can be obtained. As a result, the excavation load during excavation work is received by the tapered surface via the wedge member, so that the roller cutter can be firmly fixed, and the roller cutter can be prevented from rattling or falling off due to vibration or the like.
[0011]
Further, the attachment mechanism according to the present invention is a state in which different types of excavation tools inserted from openings opened inside the excavation machine in a state where the attachment mechanism is attached to the front end surface of a rotating disk disposed at the end of the excavation machine. The mounting saddle of the excavation tool that can be attached to each other includes a pair of wall portions for fixing the excavation tool, and the inner side surface of the fixing recess provided on the opposing wall surface of the wall portion is the excavation A mounting mechanism using an excavating tool mounting saddle having a pair of tapered surfaces that have a pair of tapered surfaces that gradually spread from the opening to the front in the insertion direction. A shield cutter in which a drill bit is attached to the front end surface of a pedestal on which a drilling tool is arranged between the wall portions and a female screw is formed on the bottom surface, before the female screw comes into contact with the coaxial through hole and the bottom surface Direction, A fixing member having a substantially trapezoidal cross section having a pair of inclined surfaces that contact the tapered surface, a through hole coaxial with the female screw, and a pressing plate having a contact surface that contacts the base end surface of the wall portion A fixing member is disposed in the fixing recess so that the front surface abuts on the bottom surface and the inclined surface abuts on the tapered surface, and a base end surface of the wall portion A bolt is inserted from a through hole of the holding plate brought into contact with the fixing plate, passes through the through hole of the fixing member, and is fastened to the female screw to fix the shield cutter.
[0012]
In the mounting mechanism of the present invention, the bottom surface of the base of the shield cutter presses the front surface of the fixing member by tightening the bolt, and the shield cutter is fixed by inserting the inclined surface of the fixing member between the tapered surfaces. The shield cutter can be reliably fixed by the wedge effect between the tapered surface and the fixing member. As a result, it is possible to prevent the shield cutter from rattling or dropping off due to vibration or the like, and since the tapered surface receives the excavation load during excavation work via the fixing member, the shield cutter can be firmly fixed. Moreover, since it becomes the structure by which a digging load is not applied to a volt | bolt, it can prevent that a volt | bolt breaks.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a view of a mounting saddle 1 on which a roller cutter and a shield cutter can be attached to each other as viewed from the front end side of the excavating machine. The mounting saddle 1 has a pair of wall portions 2 provided with a fixing recess facing the wall surfaces 2a facing each other and a pair of wall portions 3 connecting the wall portions 2 to each other by bolting, welding, or the like. It has a configured box shape, an opening for inserting a roller cutter or a shield cutter is provided on the base end surface, and a roller blade of the roller cutter or a drill bit of the shield cutter is protruded on the distal end surface. An opening is provided. And it is attached by welding etc. to the front end surface (not shown) of the rotating disk of the excavating machine so that the opening of the base end surface opens to the inner side of the excavating machine such as a shield machine. A roller cutter or a shield cutter can be inserted into the mounting saddle 1 toward the front. In addition, the roller cutter 4 is indicated by a virtual line in the figure.
In FIG. 2, the figure which looked at the wall surface 2a of the wall part 2 in which the fixed recessed part 5 was provided was seen from the front. The wall portion 2 is formed so as to be symmetric with respect to the symmetry axis O, a fixed concave portion 5 is formed at the center portion, and a groove portion 6 is formed at both end portions in the vertical direction. Further, the inner side surface 9 of the fixed recess 5 is formed to open to the base end surface 2b of the wall portion 2, and a pair of parallel surfaces 10 formed in parallel to each other from the base end surface 2b toward the front in the insertion direction. And a pair of taper surfaces 11 that are bent from the parallel surface 10 and are inclined so that the interval gradually increases forward in the insertion direction at an angle θ 1, and the arc surface is bent at an angle θ 2 with respect to the taper surface 11. A pair of inclined surfaces 12 that bend and incline so that the interval gradually narrows forward in the insertion direction, and a pair that inclines so that the interval gradually decreases forward in the insertion direction at an angle θ1 that continues from the inclined surface 12 through the stepped portion. It has the contact surface 13 and the circular arc surface 13a which makes contact surface 13 continue on the front end side. In addition, the angles are set so that the tapered surface 11 and the contact surface 13 that face each other are not parallel to each other. In the drawing, the angle θ1 = 80 °, the angle θ2 = 95 °, and the angle θ3 = 90 °. The tapered surface 11 facing the contact surface 13 is inclined by 5 °.
[0015]
Further, a circular recess 14 is formed in the vicinity of the inclined surface 12, and a through hole 15 is formed in the inclined surface 12 so that the circular recess 14 and the fixed recess 5 are continuous. A barrel nut into which a bolt used when fixing the roller cutter 4 is screwed is inserted into the circular recess 14, and the bolt penetrates the through hole 15. Further, the hardened surface 16 (range shown by hatching in FIG. 1) is applied to the front end surface 2c of the wall portion 2 in order to improve wear resistance.
[0016]
FIG. 3 is an AA arrow view in FIG. 1 and shows a mounting mechanism of the roller cutter 4 using the mounting saddle 1. The roller cutter 4 has a structure in which the roller blade 4b rotates about the support shaft 4a, and the support shaft 4a is fixed to the fixed recess 5 using a pair of wedge members 17 and is installed between the wall portions 2. It has become. The wedge member 17 has a substantially rectangular parallelepiped shape, and one side surface (first side surface) 18 of the side surfaces facing the opposite side is inclined with respect to the other side surface (second side surface) 19. The tip end side in the insertion direction is formed so as to be slightly thinner, and a through hole 20 for allowing the bolt 24 to pass through is provided along the insertion direction. The insertion direction is parallel to the contact surface 13 in the figure, and when the support shaft 4a is fixed, the second side surface 19 and the contact surface 13 are parallel, and the first side surface 18 and the tapered surface 11 are parallel to each other. Are formed so that they are parallel to each other. Further, the support shaft 4a has a substantially square cross section in which each corner portion is formed in an arc shape, and when fixed, a pair of side surfaces adjacent to each other is a contact surface 21 that contacts the contact surface 13, and the other side surface is the first side surface. The contact surface 22 is in contact with the two side surfaces 19.
[0017]
In the mounting mechanism of the roller cutter 4 configured as described above, when the roller cutter 4 is fixed, the roller cutter 4 is inserted from the opening portion of the base end surface of the mounting saddle 1 so that the contact surface 21 of the support shaft 4a is moved. It abuts on the abutment surface 13 of the fixed recess 5. Next, the wedge member 17 is arranged such that the second side surface 19 of the wedge member 17 abuts on the abutment surface 22 of the support shaft 4 a and the first side surface 18 of the wedge member 17 abuts on the tapered surface 11 of the fixed recess 5. Insert. The wedge member 17 is pressed and inserted by screwing and tightening the bolt 24 that has passed through the through hole 20 and the through hole 15 into the barrel nut 23 inserted into the circular recess 14. The support shaft 4a of the roller cutter 4 is fixed by the wedge effect of the wedge member 17 inserted by pressing.
[0018]
4 to 6 show the attachment mechanism of the shield cutter 30 using the attachment saddle 1, FIG. 4 is a view of the attachment saddle 1 as seen from the front end side of the excavating machine, and FIG. FIG. 6 is a view taken in the direction of the arrows C-C in FIG. In addition, in order to clarify each component in the figure, a portion that does not have a cross section is also hatched for each component. The shield cutter 30 is configured to include a pedestal 31 having a U-shaped cross section that opens toward the base end side, and a drilling bit 32 provided with a drilling blade at the distal end portion. The excavation bit 32 is fixed to the surface 31a by welding or the like. The outer shape of the pedestal 31 as viewed from the tip has a substantially square shape that can be fitted between the wall portions 2 and between the wall portions 3, and protrudes into the fixed recess 5 on the side surface 31 b facing the wall portion 2. A stopper 33 is provided, and the side surface of the stopper 33 is shaped to engage with the contact surface 13 and the arc surface 13a of the fixed recess 5. Further, female screws 35 are formed at four locations on the bottom surface 34 of the base 31.
[0019]
The shield cutter 30 is provided with two fixing mechanisms 36 each having a fixing member 36 that contacts the bottom surface 34 of the base 31 and a pressing plate 37 that contacts the base end surface 2 b of the wall 2. It has four bolts 38 to be screwed together. The fixing member 36 has a substantially trapezoidal cross section so that the width gradually increases forward in the insertion direction. The fixing member 36 is disposed inside the fixing recess 5 and a front surface 39 that contacts the bottom surface 34 when the shield cutter 30 is fixed. And a through hole 41 is formed so as to be coaxial with the female screw 35. In addition, the holding plate 37 has a convex cross-sectional shape that protrudes forward in the insertion direction, and includes a convex portion 42 disposed between the parallel surfaces 10 of the wall portion 2 when the shield cutter 30 is fixed, and a base plate. A through hole 44 is formed so as to be coaxial with the female screw 35.
[0020]
In the shield cutter 30 mounting mechanism configured as described above, when the shield cutter 30 is fixed, the shield cutter 30 is inserted from the opening of the proximal end surface of the mounting saddle 1 and the stopper 33 is brought into contact with the fixed recess 5. It is made to contact | abut to the surface 13 and the circular arc surface 13a. Next, with the trapezoidal side surfaces 36a of the two fixing members 36 in contact with each other, the fixing members 36 are inserted until the front surface 39 contacts the bottom surface 34, and the fixing members 36 are moved in the left-right direction in FIG. Then, a part of the fixing member 36 is disposed inside the fixing recess 5. Then, in a state where the contact surface 43 of the press plate 37 is in contact with the base end surface 2 b, the bolt 38 is screwed into the female screw 35 and tightened by passing through the through hole 44 and the through hole 41. The member 36 is pressed and inserted between the tapered surfaces 11, and the shield cutter 30 is fixed.
[0021]
By using the mounting saddle 1 as described above, the roller cutter 4 and the shield cutter 30 can be attached to each other from the opening that opens to the inside of the excavating machine, and in particular, the tapered surface 11 of the fixed recess 5 is provided. It can be firmly fixed by the wedge effect used. Thereby, it is possible to prevent the roller cutter 4 and the shield cutter 30 from rattling due to vibrations during excavation work and the roller cutter 4 and the shield cutter 30 can be prevented from falling off. Accordingly, it is possible to prevent the excavation efficiency from being lowered and the excavating machine from being damaged due to the roller cutter 4 and the shield cutter 30 being dropped off.
[0022]
Further, during excavation work, a combined excavation load of a load F1 received from the advancing direction of the excavating machine and a load F2 or F3 received from the rotating direction of the excavating machine as shown in FIG. 5 is applied to the shield cutter 30. However, these excavation loads are configured to be received by the tapered surface 11 via the fixing member 36, and the load F2 and the load F3 can also be received by the inner side surface 3a of the wall 3, so that the bolt 38 is loaded. It is possible to prevent the bolt from being broken. Further, the excavating load applied to the roller cutter 4 is also received by the tapered surface via the wedge member 17, so that the load is not applied to the bolt 24.
[0023]
In the present embodiment, the mounting saddle 1 is configured by combining the wall portions 2 and 3. However, the mounting saddle 1 may be configured integrally and the inclined surface of the wall portion 2 without using the barrel nut 23. A female screw may be formed on the screw 12. Further, the angle formed by the inner surface 9 of the fixed recess 5 is not limited to the above-described angles θ1 to θ3, and may be any angle that provides a good wedge effect.
[0024]
【The invention's effect】
As described above, according to the excavation tool mounting saddle according to the present invention, the excavation tool is fixed by the wedge effect using the tapered surface and the contact surface . It is possible to firmly fix different types of excavating tools without rattling.
Further, according to the mounting mechanism according to the present invention, the support shaft of the roller cutter is fixed using the mounting saddle and the wedge member, and the tapered surface receives the excavation load during the excavation work via the wedge member. The roller cutter can be fixed to
Further, according to the mounting mechanism according to the present invention, the pedestal of the shield cutter is fixed using the mounting saddle, the fixing member, and the presser plate, and the taper surface receives the excavation load at the time of excavation work through the fixing member. The shield cutter can be firmly fixed. Moreover, since it becomes the structure by which a digging load is not applied to a volt | bolt, it can prevent that a volt | bolt breaks.
[Brief description of the drawings]
FIG. 1 is a view of a mounting saddle according to an embodiment of the present invention as viewed from the front end side of an excavating machine.
FIG. 2 is a front view of a fixed concave portion of a wall portion.
FIG. 3 is a configuration diagram of a roller cutter mounting mechanism, as viewed in the direction of arrows AA in FIG. 1;
FIG. 4 is a configuration diagram of a shield cutter attachment mechanism, as viewed from the front end side of the excavating machine.
5 is a BB arrow view in FIG. 4;
6 is a CC arrow view in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Installation saddle 2 Wall part 2a Wall surface 2b Base end face 4 Roller cutter (excavation tool)
4a Support shaft 5 Fixed recess 9 Side surface 11 of fixed recess Tapered surface 13 Contact surface 17 Wedge member 18 First side surface 19 Second side surface 30 Shield cutter (excavation tool)
31 Pedestal 32 Excavation bit 34 Bottom surface 35 Female screw 36 Fixing member 38 Bolt 39 Front surface 40 Inclined surface 41, 44 Through hole 43 Contact surface

Claims (3)

Excavation tools in which different types of excavation tools inserted from openings opened inside the excavation machine can be attached to each other in a state where the excavation machine is mounted on the front end surface of a rotating disk disposed at the end of the excavation machine In the mounting saddle
A pair of wall portions for fixing the excavation tool is provided, and an inner side surface of a fixing recess provided on the opposite wall surface of the wall portion opens rearward in the insertion direction of the excavation tool,
The inner surface of the pair of tapered surfaces gradually from the opening portion in the insertion direction forwardly widened their spacing possess,
A mounting saddle for an excavation tool, characterized in that a pair of abutment surfaces are provided on the inner side surface of the fixed recess and located in front of the tapered surface in the insertion direction and gradually spaced from each other in front of the insertion direction. . An attachment mechanism using the excavation tool attachment saddle according to claim 1,
A roller cutter in which a roller blade rotates around a support shaft on which the excavation tool is installed between the walls ;
The angle between the tapered surfaces is set smaller than the angle between the contact surfaces,
An attachment mechanism for fixing a roller cutter by bringing the support shaft into contact with the contact surface and pressing a wedge member between the support shaft and each tapered surface. Excavation tools in which different types of excavation tools inserted from openings opened inside the excavation machine can be attached to each other in a state where the excavation machine is mounted on the front end surface of a rotating disk disposed at the end of the excavation machine In the mounting saddle
A pair of wall portions for fixing the excavation tool is provided, and an inner side surface of a fixing recess provided on the opposite wall surface of the wall portion opens rearward in the insertion direction of the excavation tool,
An attachment mechanism using an attachment saddle of an excavation tool, the inner side surface of which has a pair of tapered surfaces that gradually spread from each other to the front in the insertion direction from the opening portion ,
A shield cutter in which an excavation bit is mounted on a tip surface of a pedestal on which the excavation tool is disposed between the wall portions and a female screw is formed on the bottom surface,
A fixing member having a substantially trapezoidal cross section having a through hole coaxial with the female screw, a front surface contacting the bottom surface, and a pair of inclined surfaces contacting the tapered surface;
A presser plate having a coaxial through hole in the female screw and a contact surface that comes into contact with a base end surface of the wall portion;
A shield cutter is inserted into the mounting saddle, a fixing member is disposed in the fixing recess so that the front surface contacts the bottom surface and the inclined surface contacts the tapered surface, and contacts the base end surface of the wall portion An attachment mechanism, wherein a bolt is inserted from a through hole of the presser plate that has been made to pass through the through hole of the fixing member and fastened to the female screw to fix the shield cutter.

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