JP2019049135A - Excavator - Google Patents

Abstract

To provide an excavator capable of excavating a tunnel in a lateral direction even from the inside of a narrow tunnel.SOLUTION: The excavator comprises: a self-propelled base 2; a boom 3 which can be swirled with respect to the base 2; an arm 4 which can be expanded/contracted and is rotatable in a vertical direction with respect to the boom 3; and a cutter head 5 disposed on the front end of the arm 4. By turning the boom 3 in a lateral direction with respect to the proceeding direction of the excavator 1, the cutter head 5 is positioned opposite to the side face of a tunnel.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an excavator.

  Heretofore, as an excavator for digging a tunnel, one having a self-propelled excavator body, a boom attached to be able to oscillate with respect to the excavator body, and a cutter provided at the tip of the boom (See, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2017-025636

  By the way, when constructing a big tunnel, after digging a plurality of tunnels in parallel, it is possible to dig up these tunnels laterally from the inside and make them communicate and build one big tunnel.

  However, since the conventional excavator digs down the ground in the traveling direction, the cutter can not reach the side of the tunnel while the excavator is directed in the traveling direction. Therefore, it is difficult for the conventional excavator to dig the tunnel laterally from the inside. In addition, since the excavator is long in the traveling direction and the tunnel has a narrow width, it is difficult to turn the excavator transversely to the traveling direction after the excavator enters the tunnel.

  So, in this invention, even if it is from the inside of a narrow tunnel of width, it aims at offer of an excavator which can dig a tunnel laterally.

  The means for solving the above problems are provided at a distal end of the arm, a boom which is pivotable with respect to a self-propelled platform, an extendable telescopic arm which is vertically rotatable with respect to the boom, and And a cutter head.

  In addition, a pivoting body which can pivot with respect to the pedestal is interposed between the boom and the gantry, and the boom is rotatably coupled to the pivoting body in the vertical direction. Good. According to this configuration, since the vertically rotatable links are provided at two places between the swing body and the boom and between the boom and the arm, the movable range in the vertical direction of the cutter head becomes wide.

  Further, the cutter head may be provided so as to be capable of oscillating with respect to the arm. According to this configuration, it is possible to finely adjust the digging point by the excavator.

  Further, the drive source of the cutter head may be a hydraulic motor. According to this configuration, the excavator can be miniaturized.

  According to the excavator of the present invention, when the boom is turned, the cutter head can be directed to the side of the tunnel, so that the tunnel can be dug laterally even from inside the narrow tunnel.

It is a side view of the excavator concerning this embodiment. It is a top view of the excavator concerning this embodiment.

  Hereinafter, the present embodiment will be described with reference to the drawings. Like numbers refer to like parts throughout the several views.

  The excavator 1 according to the present embodiment includes a self-propelled gantry 2, a boom 3 pivotable with respect to the gantry 2, an extendable arm 4 capable of rotating vertically with respect to the boom 3. , And a cutter head 5 provided at the tip of the arm 4.

  Hereinafter, each part of the excavator 1 of this example will be described in detail. As shown in FIG. 1, the gantry 2 of this example is provided with a crawler 20 as a traveling body so as to be self-propelled. The configuration of the traveling body is not particularly limited as long as the gantry 2 is capable of self-traveling, and may be, for example, a tire.

  The boom 3 of this example is connected to the gantry 2 via a pivoting body 6 which is pivotable with respect to the gantry 2 as shown in FIG. Specifically, the swing body 6 of this example is provided at the end of the swing portion 61 with the swing portion 61 pivotally attached to the frame 2 at the front upper side in the traveling direction of the frame 2 via the rotary disc 11. It comprises a swinging portion 62 connected swingably to the left and right with respect to the swinging portion 61. Although not shown, the gantry 2 of the present embodiment is provided with a drive source such as a hydraulic cylinder that causes the swinging portion 62 to swing.

  Furthermore, the boom 3 in the present example is rotatably connected to the swinging portion 62 of the swing body 6 in the vertical direction. Further, as shown in FIG. 1, a hydraulic cylinder 31 for vertically driving the boom 3 is interposed between the swinging portion 62 and the boom 3. When the hydraulic cylinder 31 is extended and contracted, the boom 3 moves up and down. It is supposed to move.

  Further, as described above, an arm 4 rotatable in the vertical direction with respect to the boom 3 is connected to the tip of the boom 3. And, as shown in FIG. 1, a hydraulic cylinder 41 for driving the arm 4 up and down is interposed between the boom 3 and the arm 4, and when the hydraulic cylinder 41 is expanded and contracted, the arm 4 moves up and down. It is supposed to

  Further, the arm 4 of this embodiment is a telescopic hydraulic cylinder including an outer cylinder 4a connected to the tip of the boom 3 and an inner cylinder 4b which can be inserted and withdrawn freely in and out of the outer cylinder 4a. It is supposed to be.

  The cutter head 5 of this example is connected to the tip of the inner cylinder 4b of the arm 4 and is connected to the connecting portion 5a which can swing up and down with respect to the arm 4 and to the left and right with respect to the connecting portion 5a. A cutter unit 5b. As shown in FIG. 1, the inner cylinder 4b is provided with a hydraulic cylinder 51 for driving the connecting portion 5a up and down via the holding member 50. When the hydraulic cylinder 51 is expanded and contracted, the connecting portion 5a is designed to move up and down. Although not shown, the cutter head 5 is provided with an actuator for driving the cutter unit 5b to the left and right. When the actuator is driven, the cutter unit 5b swings to the left and right. As a result, the cutter head 5 of this embodiment is capable of oscillating with respect to the arm 4 in the vertical and horizontal directions. Although not shown, the cutter head 5 of the present embodiment is provided with a hydraulic motor as a drive source for driving the cutter unit 5b.

  Furthermore, as shown in FIG. 1 and FIG. 2, in the traveling direction front lower part and the traveling direction rear side lower part of the gantry 2 of this example, one by one excavating machine 1 on the left and right with respect to the traveling direction of the gantry 2. An outrigger 12 is provided to stabilize the drilling operation. These outriggers 12 have a base 12a pivotally attached to the gantry 2, a boom portion 12b pivotally connected vertically to the base 12a, and a boom portion 12b at the tip of the boom portion 12b. On the other hand, it comprises an arm portion 12c connected so as to be able to swing out, and a pressing plate 12d which is pivotably connected to the arm portion 12c at the tip of the arm portion 12c. Further, hydraulic cylinders 13 and 14 for driving the boom portion 12b and the arm portion 12c are interposed between the base portion 12a and the boom portion 12b and between the boom portion 12b and the arm portion 12c, respectively. When the cylinders 13 and 14 are extended and contracted, the boom portion 12b and the arm portion 12c are driven. Although not shown, the gantry 2 is provided with a drive source for driving the base 12a so that the outrigger 12 can be turned at least 90 degrees.

  Subsequently, the operation of the excavator 1 of this embodiment will be described. First, the excavator 1 is intruded into the tunnel and moved to the digging position. At this time, the boom 3, the arm 4 and the cutter head 5 face the traveling direction of the drilling machine 1, so the width of the drilling machine 1 does not increase and can move smoothly even in a narrow tunnel.

  Next, among the outriggers 12 provided at four places in the front, rear, left, and right with respect to the traveling direction of the gantry 2, two outriggers 12 facing the wall surface of the tunnel to be excavated are shown in FIG. The machine is rotated sideways with respect to the traveling direction of the machine 1. Then, like the outrigger 12 shown on the left side in FIG. 1, the hydraulic cylinders 13 and 14 of each outrigger 12 are extended, and the boom portion 12b and the arm portion 12c are driven to press the ground with the pressing plate 12d. Thereby, since the excavator 1 is stabilized, it is possible to prevent the excavator 1 from moving or toppling due to vibration or the like at the time of excavation.

  Then, the turning portion 61 of the turning body 6 is turned sideways with respect to the traveling direction of the excavating machine 1, and the tunnel on the side where the boom 3, the arm 4 and the cutter head 5 are excavated as shown by broken lines in FIG. Turn to the wall side of As described above, the swinging portion 62 is swingable to the left and right with respect to the swinging portion 61, the boom 3 is rotatable in the vertical direction with respect to the swinging portion 62, and the arm 4 is extendable. Are provided so as to be rotatable in the vertical direction. Therefore, if the cutter head 5 is moved to an arbitrary position by driving the revolving unit 6, the boom 3 and the arm 4, an arbitrary part can be excavated by the cutter head 5.

  Thus, the excavator 1 of this example includes the self-propelled gantry 2, the boom 3 pivotable with respect to the gantry 2, and the arm 4 extendable and rotatable vertically with respect to the boom 3. And a cutter head 5 provided at the tip of the arm 4. According to this configuration, since the boom 3 is provided so as to be pivotable with respect to the gantry 2, if the boom 3 is directed sideways with respect to the traveling direction of the excavator 1, the cutter head 5 can reach the side of the tunnel Be Therefore, in the drilling machine 1 of the present embodiment, tunnels excavated in parallel can be dug up and communicated in the lateral direction even from inside the tunnel. Moreover, in this example, since it is not necessary to turn the drilling machine 1 sideways with respect to the advancing direction, it is applicable also to a narrow tunnel of width.

  Further, in the excavating machine 1 of the present embodiment, a swing body 6 capable of swinging with respect to the gantry 2 is interposed between the boom 3 and the gantry 2, and the boom 3 rotates in the vertical direction with respect to the revolving body 6 It is linked possible. According to this configuration, vertically rotatable links are provided at two places between the swing body 6 and the boom 3 and between the boom 3 and the arm 4, so that a cutter is provided compared to the case of one link. The movable range in the vertical direction of the head 5 is widened, and drilling can be performed from near the ceiling of the tunnel to near the ground. However, the number of links capable of rotating the cutter head 5 in the vertical direction may be one, or three or more links may be provided.

  Further, the cutter head 5 of this example is provided to be able to oscillate with respect to the arm 4. Specifically, the cutter head 4 swings 360 degrees with respect to the arm axis. According to this configuration, the drilling site can be further finely adjusted, and for example, the back of an obstacle can be excavated while avoiding an obstacle such as a fall prevention post installed in a tunnel.

  Further, in the excavating machine 1 of this embodiment, the driving source of the cutter head 5 is a hydraulic motor. Since the hydraulic motor can be formed smaller than the electric motor, according to this configuration, the cutter head 5 can be miniaturized as compared with the case where the drive source of the cutter head 5 is an electric motor. However, if the cutter head 5 may be large, the driving source may be an electric motor.

  While the preferred embodiments of the present invention have been described above in detail, it goes without saying that modifications, variations and changes can be made without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 1 ··· Excavator, 2 ··· frame, 3 ··· boom, 4 ··· arm, 5 ··· cutter head, 6 ··· rotating body

Claims (4)

A self-propelled gantry,
A boom pivotable with respect to the cradle;
An arm which is extendable and rotatable in the vertical direction with respect to the boom;
An excavator comprising a cutter head provided at a tip of the arm. Between the boom and the cradle, a pivotable body which can pivot with respect to the cradle is interposed.
The excavator according to claim 1, wherein the boom is rotatably connected to the revolving structure in the vertical direction. The excavating machine according to claim 1 or 2, wherein the cutter head is provided so as to be able to oscillate with respect to the arm. The excavator according to any one of claims 1 to 3, wherein a drive source of the cutter head is a hydraulic motor.

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