JP2012001947A - Excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excavator having an obstacle breaking facility capable of breaking an obstacle easily, even when the obstacle is vertically long and extends generally in a propulsion direction of the excavator, in order to propel the excavator further forward.SOLUTION: An excavator has a cutter head 2 rotatable with respect to a body part 1 and equipped with a plurality of nozzles. One of the plurality of nozzles is an over cutter nozzle 10, which is slidingly movable to a position outside the outer periphery of the excavator and is angled outward in a radial direction of the excavator, or there are provided at least a pair of obliquely jetting nozzles 11 angled outward in the radial direction of the excavator and a pair of obliquely jetting nozzles 12 angled inward in the radial direction of the excavator.

Description

  The present invention relates to an excavating machine having an obstacle cutting function, and more particularly to an excavating machine that can be propelled while cutting a vertically oblong generally extending along the propulsion direction of the excavating machine. .

  2. Description of the Related Art Conventionally, an excavator is known that includes a plurality of nozzles in a cutter head that is rotatable with respect to a main body in order to propel an obstacle while pulverizing the obstacle (see, for example, Patent Document 1).

JP 2005-97830 A

  If there are oblong obstructions that generally extend along the propulsion direction in the forward direction of the excavator, in order for the excavator to propel, overcut from the outer periphery of the excavator cutter head, Need to cut.

  However, in the conventional excavator, since the overcut nozzle is fixed horizontally, when a vertically long obstacle extending substantially along the propulsion direction as described above is present in the propulsion direction of the excavator It is very difficult to cut this obstacle, and in order to cut such an obstacle and further promote the excavator, there is a limit even if the excavator is continuously cut and dug repeatedly. It became difficult.

  The present invention has been made in view of the problems of the prior art as described above, and even when there is a vertically long obstacle extending substantially along the propulsion direction of the excavator, such an obstacle is removed. It is an object of the present invention to provide an excavator having an obstacle cutting function that can be easily cut or shredded, and can smoothly drive the excavator forward.

  The present invention is an excavator provided with a plurality of nozzles in a cutter head rotatable with respect to a main body, wherein at least one of the plurality of injection nozzles is located outside an outer periphery of the excavator. There is provided an excavator characterized by being an overcutter nozzle that can slide in the radial direction of the excavator.

  The over cutter nozzle has an angle outward in the radial direction of the excavator, and the spray angle of the over cutter nozzle can be varied.

  Further, one of the plurality of nozzles is slidable in a radial direction on a plane of the cutter head, and is an outwardly-moving nozzle for oblique injection having an angle in the radial direction of the excavator. The injection angle of this outwardly moving nozzle can be varied.

  Further, another one of the plurality of nozzles is slidable in a radial direction on a plane of the cutter head, and is directed inwardly in an oblique injection with an angle inward in the radial direction of the excavator. It is a moving nozzle, and the injection angle of this inwardly moving nozzle can be varied.

  According to the present invention, since there are a plurality of angled nozzles that can move in the radial direction of the excavator, there are obstacles that are deep in the propulsion direction of the excavator (that is, generally extended along the propulsion direction of the excavator). Even if a vertically long obstacle) is present at a position where it is difficult to propel the excavator, the obstacle is quickly cut or shredded by the jet water of the angled nozzle that can be moved. Can be efficiently propelled forward.

FIG. 1 is a partial sectional side view showing an embodiment of an excavator according to the present invention. FIG. 2 is a front view showing an embodiment of a cutter head portion applicable to the excavator according to the present invention. FIG. 3 is a partial cross-sectional side view showing the excavator when cutting an obstacle using an overcutter nozzle applicable to the excavator according to the present invention. FIG. 4 is a partial sectional side view showing the excavator when cutting an obstacle using an over cutter nozzle applicable to the excavator according to the present invention. FIG. 5 is a partial cross-sectional side view showing the excavator when the obstacle is cut and propelled using the over cutter nozzle applicable to the excavator according to the present invention. FIG. 6 is a partial plan view showing an initial excavator that simultaneously cuts a pair of obstacles using a pair of outward moving nozzles and a pair of inward moving nozzles applicable to the excavator according to the present invention. FIG. 7 is a diagram illustrating an obstacle cutting state by the excavator when the obstacle is cut using a pair of outward moving nozzles and a pair of inward moving nozzles applicable to the excavator according to the present invention. FIG.

  Hereinafter, the best mode for carrying out an excavator having an obstacle cutting function according to the present invention will be described with reference to the drawings. FIG. 1 shows a partial sectional side view of an excavator according to the present invention. In FIG. 1, 1 is a shield main body part of an excavator, 2 is a cutter head part rotatable with respect to the main body part, 3 is a rotating shaft, and 4 is a sludge pipe having a screw conveyor or the like.

  The shield body 1 can be slid back and forth in the propulsion direction by a forward and backward advancement jack 1a. The cutter head unit 2 is rotationally driven by a cutter motor 3a.

  The cutter head portion 2 is provided at the front end portion in the propulsion direction and has a ring plate 5 as shown in FIG. Mounting plates 6 and 7 that are orthogonal to each other are stretched over the ring plate 5 and fixed. The mounting plates 6 and 7 cross each other on the rotating shaft 3, and the mounting plates 6 and 7 are appropriately provided with bits such as a center bit 8 and a cutter bit 9.

  Further, as well shown in FIG. 2, the cutter head portion 2 is provided with a plurality of injection nozzles. If it demonstrates concretely, the overcutter nozzle 10 which can inject the abrasive jet water containing the abrasive | polishing material for a cutting | disconnection to the front-end | tip part will be attached to the attachment plate 6 of the cutter head part 2. FIG. The overcutter nozzle 10 is provided on the mounting plate 6 so as to be slidable in a direction orthogonal to the rotation shaft 3, that is, in a radial direction of the excavator. It is designed to be slidable to a position outside the outer diameter. The overcutter nozzle 10 is angled outward in the radial direction of the excavator, that is, obliquely forward. Can be set. The angle of the overcutter nozzle 10 can be varied, and the overcutter nozzle 10 can be set radially outward at a desired angle under the usage environment conditions.

Further, the mounting plate 7 of the cutter head unit 2 is slidable on the plane of the cutter head unit 2 and has an outwardly moving nozzle 11 that is angled outward in the radial direction of the excavator.
And an inwardly moving nozzle 12 which is slidable on the plane of the cutter head portion 2 and has an angle inward in the radial direction of the excavator. In the structure shown in FIG. 2, a pair of outwardly moving nozzles 11 and inwardly moving nozzles 12 having an injection angle of approximately 45 degrees are provided on the two mounting plates 7. The outward moving nozzle 11 and the inward moving nozzle 12 can inject abrasive jet water or the like, similarly to the over cutter nozzle 10, and can change the injection angle to a desired angle.

  In addition, a fixed nozzle 13 capable of spraying abrasive jet water or the like is attached to the attachment plate 6 of the cutter head part 2 at the other end located on the opposite side of the tip part to which the over cutter nozzle 10 is attached. ing. The fixed nozzle 13 is angled outward in the radial direction of the excavator, and the injection angle can be changed to a desired angle. The fixed nozzle 13 is a fixed injection nozzle for supplying ground improvement material and cutting a normal high-pressure water jet or obstacle.

  Next, the operation of the above embodiment will be described. As shown in FIG. 3, when an obstacle with a depth in the propulsion direction of the excavator (that is, a vertically long obstruction extending substantially along the propulsion direction of the excavator) exists in front of the outer periphery of the excavator, When the excavator is driven as it is, the outer peripheral portion of the excavator comes into contact with the obstacle, and therefore, the overcutter nozzle 10 is used to cut the obstacle existing in front of the excavator on the outer circumference rather than the outer diameter of the excavator.

  More specifically, as shown in FIG. 3, the excavator is stopped at a desired cutting position, and then the overcutter nozzle 10 is slid to a position outside the outer periphery of the excavator. Obstacles in front of the excavator are overcut and cut with jet water. After this cutting, the over cutter nozzle 10 is slid to a position inside the outer periphery of the excavator, and as shown in FIG. 4, the excavator is moved to the next cutting position in the propulsion direction and stopped. Then, the overcutter nozzle 10 is slid again to a position outside the outer periphery of the excavator, and the obstacle existing in front of the excavator is overcut by the jet water of the overcutter nozzle 10 and cut. By repeating this operation, it is possible to continuously cut an obstacle having a depth in the propulsion direction of the excavator existing in the vicinity of the outer periphery of the excavator, and the outer peripheral portion of the excavator is in contact with the obstacle. Without this, the excavator can be further propelled forward. FIG. 5 shows a case where the obstacle is continuously cut in three stages of advance. As described above, since the over cutter nozzle 10 is angled outwardly in the radial direction of the excavator (the illustrated one is approximately 15 degrees), the cross-sectional shape of the obstacle is as shown in FIGS. It is cut into a sawtooth shape. Needless to say, during such intermittent cutting promotion, it is possible to operate the fixed nozzle 13 for supplying the improvement material and cutting the obstacle as described above.

  Next, when there are, for example, two oblong obstacles that are deep in the propulsion direction of the excavator (that is, oblong obstructions extending substantially along the propulsion direction of the excavator) in front of the excavator, the injection angles are mutually A case will be described in which each obstacle is cut using a pair of outwardly moving nozzles 11 and a pair of inwardly moving nozzles 12 of approximately 45 degrees.

  As shown in FIG. 6, after stopping the excavator at a position in front of the obstacle, the jet spray water of the pair of outwardly moving nozzles 11 and the pair of inwardly moving nozzles 12 intersects each obstacle. Cut the obstacles by spraying like so. As shown in FIG. 6, the pair of outwardly moving nozzles 11 and the pair of inwardly moving nozzles 12 are crossed into a V-shape because the spray angles thereof are approximately 45 degrees, so that they are obstructed. Can be cut off. After this cutting, as shown in FIG. 7, the excavator is moved to the front of the next cutting position and stopped. And each obstacle is cut | disconnected by an abrasive jet spray water of a pair of outward movement nozzle 11 and inward movement nozzle 12. FIG. By repeating this operation, the obstacle existing in front of the excavator can be continuously cross-cut and removed, thereby propelling the excavator forward without contacting this obstacle. Can do.

  3 to 5, the obstacle is cut in a sawtooth shape using only the overcutter nozzle 10, and in FIGS. 6 and 7, a pair of outwardly moving nozzles 11 and a pair of inwardly moving nozzles 12 are provided. Although the obstacle is cross-cut into a V shape by using it, it is not limited to these. That is, the overcutter nozzle 10, the outwardly moving nozzle 11, the inwardly moving nozzle 12 and the fixed nozzle 13 are used in various combinations, so that a part of the ground and the cutter head 2 front surface existing in front of the excavator or It can respond to any obstacle that appears to cover the entire surface. In addition, a plurality of over cutter nozzles 10 can be provided, and similarly, the ability to cope with obstacles can be increased in any way by appropriately providing three or more outwardly moving nozzles 11 and inwardly moving nozzles 12 respectively. Can do.

DESCRIPTION OF SYMBOLS 1 Shield body part 1a Forward / reverse jack 2 Cutter head part 3 Rotating shaft 3a Cutter motor 4 Drain pipe 5 Ring plate 6 Mounting plate 7 Mounting plate 8 Center bit 9 Cutter bit 10 Over cutter nozzle 11 Outward moving nozzle 12 Inward movement Nozzle 13 Fixed nozzle

Claims (7)

An excavator equipped with a plurality of spray nozzles on a cutter head rotatable with respect to the main body,
At least one of the plurality of injection nozzles is an overcutter nozzle that is slidable in the radial direction of the excavator to a position outside the outer periphery of the excavator. The excavator according to claim 1,
The overcutting nozzle has an oblique angle outwardly in the radial direction of the excavating machine. The excavator according to claim 2,
The excavator characterized in that the oblique angle of the over cutter nozzle can be varied. In the excavation machine according to any one of claims 1 to 3,
At least one of the plurality of injection nozzles is an outwardly moving nozzle for oblique injection that is slidable on a plane of the cutter head and is angled radially outward of the excavator. An excavator characterized by The excavator according to claim 4,
An excavator characterized in that an angle of the outwardly moving nozzle of the oblique injection can be varied. In the excavation machine according to any one of claims 1 to 5,
At least one of the plurality of injection nozzles is an inwardly moving nozzle for oblique injection that is slidable on a plane of the cutter head and has an angle inward in the radial direction of the excavator. An excavator characterized by The excavator according to claim 6,
An excavator characterized in that the angle of the inwardly moving nozzle of the oblique injection can be varied.