JP4452090B2 - Drilling rig - Google Patents

Description

  The present invention relates to an excavation apparatus for excavating the ground.

As shown in FIG. 8, the excavator for excavating the ground includes a fixed shaft 101 supported by the base machine in a state where the axial direction is arranged in the vertical direction, and an output that can rotate around the fixed shaft 101. A stirring shaft 110 including a hydraulic motor 114 (hollow motor) having a portion 111 and a stirring blade 112 having a stirring blade 112 attached to the output portion 111; and a fixed shaft provided below the stirring device 110. And a drilling means 120 having a hydraulic motor 125 (hollow motor) having an output part 121 rotatable around 101 and having a drilling shaft 124 having a drilling blade 122 and a stirring blade 123 attached to the output part 121. There is a drilling device capable of excavating the ground with the rotating means 100 (see, for example, Patent Document 1).
In this excavator, the hydraulic motor 125 of the excavator 120 is disposed below the agitator 110, and when excavating the ground, the hydraulic motor 125 of the excavator 120 can be disposed in the excavation hole. The center of gravity of the entire apparatus can be lowered.

Further, in the excavator described above, it is possible to construct an excavation groove extending in one direction by arranging a plurality of rotation means in parallel with the base machine so that a part of the excavation range of the excavation blade overlaps. it can. At this time, a side wall excavating means having an excavating blade rotatable around the horizontal axis is provided between adjacent excavating shafts, and the side surface of the excavation groove is excavated flat by the side wall excavating means, so that the same width is obtained. Excavation grooves extended in the direction can be constructed.
Japanese Patent No. 3407139 (paragraphs 0007 to 0009, paragraph 0044, FIG. 2, FIG. 3)

However, in the above-described excavator, the excavating blade of the side wall excavating means is rotated by the rotational force of the excavating shaft, so that the rotational force of the excavating shaft rotating around the vertical axis rotates around the horizontal axis. There is a problem that it is necessary to provide a gear mechanism for transmitting to the excavating blade of the side wall excavating means, and the configuration of the rotating means becomes complicated.
Further, since the two excavating blades provided in the excavating means and the side wall excavating means are rotated by one hydraulic motor provided in the excavating means, the rotational torque of each excavating blade is reduced, and the excavation efficiency is improved. There is a problem of being lowered.

  Therefore, in the present invention, the above-described problems are solved, and the excavation groove extended in one direction with the same width is efficiently constructed by excavating the ground with sufficient torque without complicating the configuration of the apparatus. It is an object of the present invention to provide a drilling rig that can be used.

In order to solve the above-mentioned problem, the invention according to claim 1 is an excavation apparatus capable of excavating the ground with an excavating blade, and is lateral to the traveling direction in a state where the axial direction is arranged in the traveling direction. A plurality of fixed shafts arranged side by side and a connecting shaft that is disposed between each adjacent fixed shaft and has both ends attached to each adjacent fixed shaft; the drive motor is mounted, the connecting shaft, with the connecting shaft penetrates, output portion is rotatable outer circumferential drive motor mounted about the connecting shaft, the output of the drive motor, the tip A digging blade is attached , and a cylindrical drum-type digging blade is attached to the outer periphery of the output portion of the outer peripheral drive motor.

Here, the configuration of the drive motor, such as a hydraulic motor or an electric motor, is not limited, and it is sufficient that the excavating blade can exert a necessary torque during excavation.
In addition, the outer peripheral drive motor whose output unit can rotate around a fixed shaft is an outer peripheral drive type hydraulic device that includes an output unit that can rotate around an inserted shaft, such as a radial piston motor or an axial piston motor. It is a motor .
Moreover, the structure of a base machine is not limited, What is necessary is just a structure which can support a some fixed shaft.

Thus, by arranging a connecting shaft between adjacent fixed shafts and providing a rotatable excavating blade around the connecting shaft, it is possible to excavate between adjacent fixed shafts in a rectangular shape in plan view. it can. Therefore, the excavation groove extended in one direction with the same width | variety can be constructed | assembled by making the excavation blade provided in each fixed shaft, and the excavation blade provided in the connection shaft into the same diameter.
In addition, by excavating between adjacent fixed shafts by the excavating blade provided on the connecting shaft, the excavation range is partially overlapped, and the adjacent fixed shafts are not placed close to each other, but the same It is possible to construct excavation grooves that extend in one direction with width.
In this way, it is possible to simplify the configuration of the excavator capable of excavating excavation grooves extending in one direction with the same width.
Furthermore, each digging blade can excavate the ground with sufficient torque by driving the digging blade provided on each fixed shaft and the digging blade provided on the connecting shaft with separate driving sources. Excavation grooves extending in one direction with the same width can be constructed efficiently.

The invention according to claim 2 is the excavator according to claim 1, wherein at least one fixed shaft protrudes laterally in the axial direction of the fixed shaft, and is fixed to the fixed shaft at one end. The projecting shaft is provided with another outer peripheral drive motor that can rotate around the projecting shaft with the projecting shaft inserted therein, and the other outer peripheral drive. A cylindrical drum-type excavation blade is attached to the outer periphery of the output part of the motor.

  In such an excavating apparatus, the ground can be excavated in a rectangular shape in a plan view by an excavating blade provided on a protruding shaft protruding to the side of the fixed shaft. Therefore, by projecting the protruding shaft in the extending direction of the excavation groove, the end in the extending direction of the excavation groove can be formed in a rectangular shape in plan view.

  The invention according to claim 3 is the excavator according to claim 1 or 2, wherein the output portion of the drive motor attached to the fixed shaft is in a state where the fixed shaft is inserted. A stirring member that can rotate around the fixed shaft and that can stir the excavated sediment is provided around the output portion of the drive motor.

  Here, the stirring member is configured by a spiral wing member, a plurality of wing members, and the like, and is a member that stirs the excavated sediment in the excavation hole by rotating together with the output unit. In addition, the shape, material, etc. of a stirring member are not limited, What is necessary is just a structure which can stir excavated earth and sand efficiently.

  In this way, by attaching a stirring member capable of stirring the excavated earth and sand around the output portion of the drive motor attached to the tip of the fixed shaft, the stirring member is rotated with a large rotational torque in the vicinity of the drilling blade. Can do. Therefore, when the ground is improved by injecting the solidifying agent into the excavated sediment and stirring and mixing the excavated sediment and the solidifying agent, the excavated sediment and the solidifying agent can be efficiently stirred and mixed.

According to such an excavating apparatus, a connecting shaft is disposed between adjacent fixed shafts, and a rotating excavating blade is provided around the connecting shaft, whereby a rectangular space between the adjacent fixed shafts is obtained in a plan view. Can be drilled into. As a result, there is no need to provide a gear mechanism for transmitting the rotational force of the output section, or to place the adjacent fixed shafts close to each other so that the excavation ranges overlap, so that they extend in one direction with the same width. It is possible to simplify the configuration of the excavator that can excavate the excavated trench.
In addition, since the excavating blades provided on the fixed shaft and the excavating blades provided on the connecting shaft are driven by different driving sources, each excavating blade can excavate the ground with sufficient torque. Excavation grooves extended in one direction by width can be constructed efficiently.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the description of each embodiment, the same constituent elements are denoted by the same reference numerals, and redundant descriptions are omitted.

  In this embodiment, an excavator that excavates a digging groove extending in one direction, injects a solidifying agent into the digging groove, and stirs and mixes the excavated earth and solidifying agent will be described as an example. To do.

[First Embodiment]
First, the excavator according to the first embodiment of the present invention will be described.
FIG. 1 is a side view showing an excavation apparatus according to a first embodiment of the present invention. 2A and 2B are diagrams showing the excavation agitation means of the excavator according to the first embodiment of the present invention, in which FIG. 2A is a front view of the excavation agitation means, and FIG. 2B is a side view of the excavation agitation means. FIG. 3 is a plan view showing excavation grooves constructed by the excavation apparatus according to the first embodiment of the present invention. FIG. 4 is a view showing another configuration of the excavating apparatus according to the first embodiment of the present invention, and (a) is a front view showing a configuration in which a drum type excavating blade provided on the connecting shaft is extended. b) is a front view showing a configuration in which three fixed shafts are provided. FIG. 5 is a view showing another configuration of the excavator according to the first embodiment of the present invention, and (a) is a side view showing a configuration in which excavation stirring means are arranged in the width direction of the excavation groove. b) is a side view showing a configuration in which the fixed shaft is bifurcated in the width direction of the excavation groove.
In the following description, the right side corresponds to the right side of FIG. 2A, and the left side corresponds to the left side of FIG.

First, the configuration of the excavator according to the first embodiment of the present invention will be described.
As shown in FIGS. 1 and 2, the excavation apparatus 1 according to the first embodiment includes a base machine 2 and excavation stirring means 20 supported by the base machine 2 so as to be movable up and down. The excavating blades 41, 41, 61 and the stirring members 43, 43 are excavated by the excavating blades 41, 41, 61 and extended in one direction with the same width, and in the excavated groove C The solidifying agent is injected, and the excavated sediment and the solidifying agent can be stirred and mixed in the excavation groove C by the stirring members 43 and 43.

Next, the configuration of the base machine 2 will be described.
As shown in FIG. 1, the base machine 2 includes a vertical lifting rail 3, a support member 4 that can be lifted and lowered along the lifting rail 3, a swivel base 5 for swiveling the lifting rail 3 in the horizontal direction, A tilting means 6 for tilting the elevating rail 3, an oil supply pipe 7 for supplying driving oil to the excavation stirring means 20, an oil discharge pipe 8 for discharging the driving oil from the excavation stirring means 20, The supply pipe 9 for supplying the solidifying agent to the excavation stirring means 20 and the crawler belt 10 for moving the base machine 2 are configured as main parts.

The turning pedestal 5 is composed of an upper pedestal 5a and a lower pedestal 5b. The lower pedestal of the elevating rail 3 is pivotally supported by the upper pedestal 5a so that the upper pedestal 5a can be rotated in the horizontal direction. The lifting rail 3 can be turned in the horizontal direction.
The retractable means 6 of the elevating rail 3 is a telescopic hydraulic cylinder, the lower end portion is connected to the upper pedestal 5a, and the upper end portion is connected to the middle portion of the elevating rail 3, and the retractable means 6 is By extending and contracting, the elevating rail 3 can be tilted around the rotation support portion 11 provided at the lower end of the elevating rail 3.

  The support member 4 is a member that supports the excavating and stirring means 20 and is vertically movable along the lift rail 3. The mechanism for raising and lowering the support member 4 is not limited. In this embodiment, an electric winch (not shown) is installed on the swivel base 5 and the wire 12 of the electric winch is connected to the elevating rail 3. The support member 4 is lifted up by being fixed to the upper end portion of the elevating rail 3 via a pulley 13 installed at the upper end portion and a pulley 14 installed at the upper portion of the support member 4, and the support member 4 is drawn out or wound up. 4 is raised and lowered.

  The oil supply pipe 7 and the oil discharge pipe 8 are members for driving the excavation stirring means 20 and connect an oil tank (not shown) installed at the construction site and the excavation stirring means 20. The driving oil is supplied from the oil tank to the excavation stirring means 20 through the oil supply pipe 7, and the driving oil discharged from the excavation stirring means 20 is collected in the oil tank through the oil discharge pipe 8. ing. The supply pipe 9 is connected to the excavation stirring means 20 from a storage tank (not shown) installed at the construction site, and the solidifying agent in the storage tank is supplied to the excavation stirring means 20 through the supply pipe 9. It is comprised so that.

Next, the configuration of the excavation stirring means 20 will be described.
As shown in FIG. 2, the excavation stirring means 20 has two fixings arranged in parallel in the left-right direction (side) with respect to the vertical direction with the axial direction arranged in the vertical direction (traveling direction). The shafts 30 and 30 are arranged in the horizontal direction, and the connecting shafts 50 are attached to the fixed shafts 30 and 30 at both ends. Then, the fixed shafts 30 and 30 are supported by the support member 4 of the base machine 2 (see FIG. 1), so that the excavation stirring means 20 moves up and down in the vertical direction in conjunction with the support member 4. .
Further, an outer peripheral drive motor (hereinafter referred to as “outer motor”) 40 in which the output portion 42 can rotate around the fixed shaft 30 is attached to the lower end portions (tip portions) of the fixed shafts 30, 30. The outer motor 60 in which the output part 62 can rotate around the connecting shaft 50 is attached.

  The fixed shafts 30, 30 are arranged in parallel in the left-right direction at a predetermined interval, and the upper ends of the fixed shafts 30, 30 are fixed by being attached to the support member 4 of the base machine 2 (see FIG. 1). The shafts 30 and 30 are supported by the support member 4. The fixed shafts 30, 30 are hollow tubes in which supply holes (not shown) penetrating in the axial direction are formed in the central portion, and the fixed shafts 30 are provided at the lower ends of the fixed shafts 30, 30. An outer motor 40 is attached in a penetrating state.

The outer motor 40 provided on the fixed shaft 30 is an outer peripheral drive type hydraulic motor in which the output portion 42 can rotate around the fixed shaft 30 in a state where the fixed shaft 30 penetrates, and is along the outer peripheral surface of the output portion 42. A stirring member 43 formed in a spiral shape is attached. Further, an inverted conical tip excavating blade 41 capable of excavating the ground in the vertical direction is attached to the lower end portion of each output portion 42, and the tip excavating blade 41 is interlocked with the output portion 42 around the fixed shaft 30. It is comprised so that it may rotate.
In this embodiment, the fixed shaft 30 passes through the outer motor 40 and is disposed up to the lower end portion of the tip excavation blade 41. However, the fixed shaft 30 does not pass through the outer motor 40, so The output part 42 can also be rotated around the fixed shaft 30 in the state of being inserted into the shaft.

  The connecting shaft 50 is disposed above the outer motors 40, 40 of the fixed shafts 30, 30, and both end portions of the adjacent fixed shafts 30, 30 are arranged in a state where the axial direction is horizontally disposed. Each is attached. Further, an outer motor 60 through which the connecting shaft 50 passes is attached to the central portion of the connecting shaft 50 in the left-right direction.

  The outer motor 60 provided on the connecting shaft 50 is an outer peripheral drive type hydraulic motor in which the output portion 62 can rotate around the connecting shaft 50 in a state where the connecting shaft 50 penetrates, so that the output portion 62 is inserted. Thus, a cylindrical drum-type excavation blade 61 is attached to the outer peripheral surface of the output portion 62. The drum-type excavating blade 61 is formed so as to cover substantially the entire region of the connecting shaft 50, and is configured to rotate around the connecting shaft 50 in conjunction with the output unit 62. Further, the drum-type excavating blade 61 is formed to have the same diameter as the tip excavating blades 41, 41 provided on the fixed shafts 30, 30. By rotating around the connecting shaft 50, the drum-type excavating blade 61 The excavation bit attached to the outer peripheral surface has the same width as the distal excavation blades 41 and 41 provided on the fixed shafts 30 and 30, and is rectangular (rectangular) in plan view between the adjacent fixed shafts 30 and 30. Can be excavated.

Here, around the supply holes of the fixed shafts 30, 30, oil supply holes (not shown) for supplying drive oil to the outer motor 40 and drive oil from the outer motor 40 are discharged. An oil drain hole (not shown) and a drain hole (not shown) when drive oil leaks inside the outer motor 40 penetrate in the axial direction, and the oil supply hole, oil drain hole and drain The hole is connected to the outer motor 40.
An oil supply hole (not shown) for supplying drive oil to the outer motor 60 and an oil discharge hole (not shown) for discharging drive oil from the outer motor 60 are provided inside the connecting shaft 50. And a drain hole (not shown) when the driving oil leaks inside the outer motor 60 penetrates in the axial direction.
In addition, one fixed shaft 30 is formed with another oil supply hole (not shown) so as to communicate with the oil supply hole of the connection shaft 50, and the other fixed shaft 30 is connected to the connection shaft 50. Other oil drain holes (not shown) and other drain holes (not shown) are formed so as to communicate with the oil drain holes and the drain holes, respectively.

  The supply pipe 9 is connected to the supply holes of the fixed shafts 30 and 30, and the oil supply pipe 7 is connected to the oil supply holes and the other oil supply holes. Is connected to an oil drain pipe 8 (see FIG. 1), and a drain pipe (not shown) is connected to the drain hole and other drain holes. In each connection, since the fixed shafts 30 do not rotate during excavation, it is not necessary to provide a special mechanism such as a swivel joint at the connection portion, and the configuration of the excavator 1 is simplified.

In the excavation stirring means 20 configured in this way, as shown in FIGS. 2 and 3, the circular region A in a plan view is formed by the tip excavation blades 41, 41 provided on the adjacent fixed shafts 30, 30. It is possible to excavate in two places at a predetermined interval. Furthermore, the area A and A can be communicated by excavating a rectangular area B in a plan view between the areas A and A by the drum-type excavating blade 61 provided on the connecting shaft 50. At this time, the tip excavating blades 41 and 41 provided on the fixed shafts 30 and 30 and the drum excavating blade 61 provided on the connecting shaft 50 have the same diameter, and the maximum widths of the regions A and A and the region B Since the widths are the same, the track-shaped excavation groove C extending in one direction with the same width can be excavated.
Further, the solidifying agent is injected into the excavation groove C through the supply holes of the fixed shafts 30 and 30, and the stirring members 43 and 43 attached to the output portions 42 and 42 of the two outer motors 40 and 40 are rotated. Drilling earth and solidification agent can be mixed with stirring.

  Note that, by rotating the output portions 42, 42 of the two outer motors 40, 40 in opposite directions, the mutual rotational force can be canceled out, so that the excavation stirring means 20 can be stabilized during excavation. At the same time, the stirring performance of the excavation stirring means 20 can be enhanced by rotating the adjacent stirring members 43, 43 in opposite directions.

  Therefore, in the excavating apparatus 1 according to the first embodiment, adjacent fixings are provided by providing a gear mechanism for transmitting the rotational force of the output portions 42 and 62 of the motors 40 and 60 or overlapping the excavation ranges. Since it becomes unnecessary to arrange | position the axis | shafts 30 and 30 close, the structure of the excavation apparatus 1 which can excavate the excavation groove C extended by the same width and one direction can be simplified.

Next, a ground improvement method using the excavator 1 according to the first embodiment will be described.
First, as shown in FIGS. 1, 2 and 3, the base machine 2 is moved to the side of a predetermined position for excavation, and the swivel base 5 and the tilting means 6 are adjusted to bring the excavation stirring means 20 to the predetermined position. Install vertically. And the excavation stirring means 20 is lowered | hung and the front-end excavation blades 41 and 41 provided in each fixed shaft 30 and 30 are contact | abutted to the ground surface.

  Subsequently, the excavating and stirring means 20 is sequentially lowered by the base machine 2 while driving the three outer motors 40, 40 and 60 to rotate the output units 42, 42 and 62. Thereby, the circular area A in a plan view is excavated at two positions with a predetermined interval by the tip excavating blades 41, 41 provided on the fixed shafts 30, 30. Further, a rectangular area B is excavated between the areas A and A by a drum-type excavating blade 61 provided on the connecting shaft 50 so that the areas A and A communicate with each other. In this manner, the excavation stirring means 20 can construct the excavation groove C extended in one direction with the same width.

  On the other hand, the solidifying agent is supplied to the supply holes of the two fixed shafts 30 and 30 through the supply pipe 9 while excavating the ground with the excavating blades 41, 41 and 61 of the excavating and stirring means 20. This solidifying agent is injected into the excavation groove C from the lower end of the supply hole of each fixed shaft 30, 30, and the excavated sediment and solidifying agent are stirred by the stirring members 43, 43 of the outer motors 40, 40 of each fixed shaft 30, 30. Are mixed with stirring. At this time, since the outer motor 40 is attached to the lower end portion of the fixed shaft 30, the agitating member 43 rotates with a large rotational torque in the vicinity of the tip excavating blades 41 and 41 and the solidifying agent injection location. The solidifying agent can be efficiently stirred and mixed.

Finally, the excavation agitation means 20 is raised while being agitated and mixed with the excavated sediment and the solidifying agent and pulled up from the excavation groove. At this time, since the resistance force between the outer motors 40 and 40 and the excavated earth and sand is reduced by rotating the output portions 42 and 42 of the outer motors 40 and 40 of the fixed shafts 30 and 30, excavation is performed. The stirring means 20 can be easily pulled up from the excavation groove C.
Then, after the excavation stirring means 20 is detached, the excavation earth and sand in the excavation groove C is hardened to increase the strength of the ground in the excavation groove C, and the improvement of the ground is completed.

  In addition, after the excavation stirring means 20 is detached, before the excavated soil in the excavation groove C is hardened, a steel reinforcing rod D (see FIG. 3) is disposed in the excavation groove C, so that the inside of the excavation groove C The strength of the ground can be further increased. At this time, the excavation groove C constructed by the excavation apparatus 1 of the present invention is extended in one direction with the same width, and a rectangular parallelepiped reinforcing rod D formed along the side surface of the excavation groove C can be used. Therefore, the strength in the excavation groove C can be increased uniformly.

  Therefore, in the ground improvement method using the excavator 1 according to the first embodiment, the tip excavating blades 41, 41 provided on the fixed shafts 30, 30, and the drum excavating blade 61 provided on the connecting shaft 50, Are excavated by a separate driving source, each excavating blade 41, 41, 61 can excavate the ground with sufficient rotational torque, and the stirring members 43, 43 have sufficient rotational torque. Since the excavated soil and the solidifying agent can be stirred and mixed with each other, the excavation groove C having the same width and extended in one direction can be efficiently constructed, and the strength of the ground inside thereof can be increased uniformly.

  In the excavator 1 according to the first embodiment described above, the outer motor 60 is attached to the central portion of the connecting shaft 50 in the left-right direction. However, as shown in FIG. The outer motor 60 can also be attached closer to one end than the central portion. In this configuration, with the connecting shaft 50 inserted, a cylindrical extending drum type excavating blade 63 rotatable around the connecting shaft 50 is attached to one end of the drum type excavating blade 61, and the connecting shaft 50 is substantially entirely By covering the region with the drum-type excavating blade 61 and the extending drum-type excavating blade 63, it is possible to excavate the adjacent fixed shafts 30 and 30 into a rectangle in plan view.

  Further, the number of the fixed shafts 30 is not limited to two, and can be appropriately set according to the size of the excavation groove to be constructed. For example, as shown in FIG. 4B, three fixed shafts 30, 30, 30 are arranged side by side with respect to the base machine 2 (see FIG. 1), and are arranged between the adjacent fixed shafts 30, 30. The connecting shafts 50 and 50 may be provided with drum-type excavating blades 61 and 61, respectively. Furthermore, the arrangement of the plurality of fixed shafts 30 is not limited, and the three fixed shafts 30 may be arranged in three directions in plan view, or the four fixed shafts 30 may be arranged in four directions in plan view. . In addition, since it is possible to cancel each other's rotational force by rotating the drum-type excavating blades 61, 61 provided on the adjacent connecting shafts 50, 50 in opposite directions, the excavation stirring means 20 can be used during excavation. It can be stabilized.

Further, as shown in FIG. 5A, by arranging the excavation stirring means 20 in parallel in the width direction of the excavation groove C (left and right direction in FIG. 5), the excavation groove C having a large width can be constructed. In addition, the code | symbol 51 is a connection shaft for connecting each fixed shaft 30 and 30 adjacent to the width direction of the excavation groove C. As shown in FIG.
Further, as shown in FIG. 5B, the fixed shaft 30 is bifurcated in the width direction of the excavation groove C above the connection shaft 50, so that the tip excavation blade 41 and the drum excavation blade 61 are excavated in the excavation groove C. Can be juxtaposed in the width direction. At this time, since the tip excavation blades 41 and 41 and the drum type excavation blades 61 and 61 adjacent to each other in the width direction of the excavation groove C are rotated in opposite directions, the mutual rotational force can be canceled out. Sometimes the excavating and stirring means 20 can be stabilized.

[Second Embodiment]
Next, an excavator according to a second embodiment of the present invention will be described.
FIG. 6 is a front view showing the excavation stirring means of the excavator according to the second embodiment of the present invention. In the following description, the right side corresponds to the right side of FIG. 6, and the left side corresponds to the left side of FIG.

The excavator according to the second embodiment of the present invention has substantially the same configuration as the excavator 1 according to the first embodiment (see FIGS. 1 and 2), and the configuration of the excavator agitation means 20 is different.
In the excavating and agitating means 20a of the excavating apparatus according to the second embodiment, as shown in FIG. 6, a drum type excavator that can rotate around a connecting shaft 50 having both ends attached to two fixed shafts 30 and 30, respectively. Projection shafts 70 and 70 each having a blade 61 and having one end attached to each of the fixed shafts 30 and 30 so as to protrude to the left and right sides (sides in the axial direction) of the respective fixed shafts 30 and 30. Each of the projecting shafts 70 and 70 is provided with an outer motor 80 that can rotate the output portion 82 around the projecting shaft 70 with the projecting shaft 70 passing therethrough. Furthermore, a cylindrical drum-type excavation blade 81 is attached to the outer peripheral surface of the output unit 82 so that the output unit 82 is inserted into the outer motor 80 provided on the protruding shaft 70.

The drum-type excavating blades 81, 81 provided on the projecting shafts 70, 70 are formed so as to cover substantially the entire region of the projecting shaft 70, and rotate around the projecting shaft 70 in conjunction with the output portion 82. It is configured. The drum-type excavating blade 81 is formed to have the same diameter as the tip excavating blades 41 and 41 provided on the fixed shafts 30 and 30, and is attached to the outer peripheral surface by rotating around the protruding shaft 70. The excavation bit has the same width as the tip excavation blades 41 and 41 provided on the fixed shafts 30 and 30, and the left and right sides of the two fixed shafts 30 and 30, that is, both end portions in the extending direction of the excavation groove are flat. It can be excavated into a rectangular shape (rectangular shape). Thus, a rectangular excavation groove can be constructed in plan view by the tip excavation blades 41 and 41 and the drum excavation blades 61, 81 and 81.
Note that the output portion 82 can be rotated around the protruding shaft 70 in a state where the protruding shaft 70 is inserted into the outer motor 80 without penetrating the outer motor 80.

As mentioned above, although an example about the suitable embodiment of the present invention was explained, the present invention is not limited to the above-mentioned embodiment, and design change is possible suitably in the range which does not deviate from the meaning of the present invention.
For example, in the first embodiment and the second embodiment described above, the outer peripheral drive type outer motor 40 having the output portion 42 that can rotate around the fixed shaft 30 is used, but the axial direction is arranged in the vertical direction. A drive motor having an output shaft (output unit) (hereinafter referred to as “inner motor”) can be used.
FIG. 7 is a view showing another configuration of the excavation and stirring means according to the first embodiment of the present invention, and is a front view showing a configuration using an inner motor.
Here, the case where an inner motor is used for the excavation stirring means 20 (refer FIG. 2) which concerns on 1st Embodiment of this invention is demonstrated as an example. For this reason, the same components are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 7, in the excavating and stirring means 20 b using the inner motor 90, the output shaft 92 of the inner motor 90 is arranged concentrically with the fixed shaft 30. Upper end portions of the inner motors 90 and 90 are respectively attached, and tip excavation blades 91 and 91 are attached to lower end portions of the output shafts 92 and 92 of the inner motors 90 and 90, respectively. In this way, the ground excavating blades 91, 91 can be excavated by the tip excavating blades 91, 91 rotating in conjunction with the rotation of the output shafts 92, 92 of the inner motors 90, 90. In this configuration, since the manufacturing cost of the inner motor 90 is less than that of the outer motor, the manufacturing cost of the excavator can be reduced.

It is the side view which showed the excavation apparatus which concerns on 1st Embodiment of this invention. It is the figure which showed the excavation stirring means of the excavation apparatus which concerns on 1st Embodiment of this invention, (a) is a front view of an excavation stirring means, (b) is a side view of an excavation stirring means. It is the top view which showed the excavation groove constructed | assembled with the excavation apparatus which concerns on 1st Embodiment of this invention. It is the figure which showed the other structure of the excavation apparatus which concerns on 1st Embodiment of this invention, (a) is the front view which showed the structure which extended the excavation blade provided in the connection shaft, (b) is three pieces It is the front view which showed the structure which provided the fixed axis | shaft. It is the figure which showed the other structure of the excavation apparatus which concerns on 1st Embodiment of this invention, (a) is the side view which showed the structure which arranged the excavation stirring means in the width direction of the excavation groove, (b) is fixed It is the side view which showed the structure which branched the shaft into two forks in the width direction of the excavation groove. It is the front view which showed the excavation stirring means of the excavation apparatus which concerns on 2nd Embodiment of this invention. It is the figure which showed the other structure of the excavation stirring means which concerns on 1st Embodiment of this invention, and is the front view which showed the structure using the inner motor. It is the sectional side view which showed the rotation means of the conventional excavation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Excavator 2 Base machine 20 Excavation stirring means 30 Fixed shaft 40 Outer motor (drive motor)
41 tip excavation blade 42 output unit 43 stirring member 50 connecting shaft 60 outer motor (peripheral drive motor)
61 Drum type drilling blade 62 Output part C Drilling groove

Claims (3)

A drilling device capable of excavating the ground with a drilling blade,
In a state where the axial direction is arranged in the traveling direction, a plurality of fixed shafts arranged side by side with respect to the traveling direction;
A connecting shaft that is disposed between each of the adjacent fixed shafts and has both ends attached to each of the adjacent fixed shafts;
A drive motor is attached to the tip of each fixed shaft,
An outer peripheral drive motor is attached to the connecting shaft so that the output portion can rotate around the connecting shaft in a state where the connecting shaft penetrates.
The excavator is characterized in that a tip excavation blade is attached to the output portion of the drive motor, and a cylindrical drum excavation blade is attached to the outer periphery of the output portion of the outer periphery drive motor. At least one of the fixed shafts includes a protruding shaft having one end attached to the fixed shaft so as to protrude sideways in the axial direction of the fixed shaft,
The projecting shaft is attached with another outer peripheral drive motor that can rotate around the projecting shaft while the projecting shaft is inserted.
The excavation apparatus according to claim 1 , wherein a cylindrical drum-type excavation blade is attached to an outer periphery of an output portion of the other outer peripheral drive motor. The output portion of the drive motor attached to the fixed shaft is rotatable around the fixed shaft in a state where the fixed shaft is inserted,
The excavator according to claim 1 or 2, wherein an agitating member capable of agitating excavated earth and sand is attached around an output portion of the drive motor.

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