Construction equipment and ground improvement system

Abstract

The present invention provides a construction device that can supply power to the mixing shaft in real time during ground improvement work and appropriately control the drive device. [Solution] The construction device 30 includes a stirring shaft 33 that penetrates the ground and discharges a solidifying agent, and a rotary motor 32 provided on the side of the stirring shaft 33 and controlling the rotation of the stirring shaft 33. The construction device 30 also includes an elevator 31 that controls the raising and lowering of the stirring shaft 33, and a power transmission unit 230 that transmits power sent from the construction machine body 20. The construction device 30 also includes a power receiving unit 330 that is in contact with the power transmission unit 230 and receives power transmitted from the power transmission unit 230 while the rotary motor 32 and / or the elevator 31 are being driven. Furthermore, the construction device 30 includes a first communication control unit 310 that controls a drive device 340 and a sensor 350 that are driven based on the power received by the power receiving unit 330 while the rotary motor 32 and / or the elevator 31 are being driven.

Description

Technical Field

[0001] The present invention relates to a construction device and a ground improvement system.

Background Art

[0002] Conventionally, in a construction method of improving the ground by stirring and mixing an improvement material with soft cohesive soil in the ground using a ground improvement construction machine, a technique for realizing efficient construction by wirelessly transmitting and receiving construction data and control information has been proposed. Patent Document 1 discloses a ground improvement construction machine provided with a wireless transceiver on a stirring shaft. The ground improvement construction machine disclosed in Patent Document 1 wirelessly acquires data obtained from sensors at the tip of the stirring shaft and sends a control signal for operating a solenoid valve, etc. to the wireless transceiver on the stirring shaft, thereby enabling efficient construction in ground improvement.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the ground improvement construction machine disclosed in Patent Document 1, drive devices such as a wireless transceiver and a solenoid valve provided on the stirring shaft, sensors, etc. require power for their drive. Therefore, in the ground improvement construction machine disclosed in Patent Document 1, communication with the wireless transceiver, drive control, and data acquisition from sensors are performed when the stirring shaft is stopped. Thus, there is a need for a system that enables communication with the wireless transceiver, drive control, and data acquisition from sensors even when the stirring shaft is driven.

[0005] This invention has been made in view of the problems of the prior art described above. The object of this invention is to provide a construction device that can supply power to the stirring shaft in real time during ground improvement work and appropriately control the drive device. [Means for solving the problem]

[0006] A construction apparatus according to an aspect of the present invention is a construction apparatus for creating solidified piles and improving the ground by discharging a solidifying material into the ground, and is driven by control from the construction machine body to create solidified piles, comprising: a stirring shaft that penetrates into the ground and discharges the solidifying material; a rotary motor provided on the side of the stirring shaft to control the rotation of the stirring shaft; a lifting mechanism that controls the raising and lowering of the stirring shaft; an air supply pipe provided inside the stirring shaft to supply compressed air; an improvement material supply pipe provided inside the stirring shaft to supply the solidifying material; a power transmission unit that transmits power sent from the construction machine body; a power receiving unit in contact with the power transmission unit and receiving power transmitted from the power transmission unit while the rotary motor and / or lifting mechanism are being driven; and The system includes a drive unit located at the lower vertical end of the mixing shaft, which is driven based on power received by the power receiving unit and controls the opening and closing of the pipes for supplying improvement material and the pipes for supplying air; a sensor located at the lower vertical end of the mixing shaft, which is driven based on power received by the power receiving unit and captures images of the construction status; and a first communication control unit connected to the drive unit and the sensor, which is driven based on power received by the power receiving unit while the rotary and / or elevator is in operation and controls the drive unit and the sensor. The first communication control unit drives the drive unit based on a control signal sent wirelessly from a second communication control unit located in the construction machine body and transmits data acquired by the sensor to the second communication control unit wirelessly.

[0007] Another aspect of the present invention relates to a ground improvement system comprising the above-mentioned construction device and a construction machine body that controls the construction device, wherein the construction machine body includes a second communication control unit that sends a control signal to a first communication control unit of the construction device in response to user input, a control panel that controls an elevator and a rotary device provided on the construction device in response to user operation instructions, and a battery that transmits power to a power transmission unit. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a construction device that can supply power to the stirring shaft in real time during ground improvement work and appropriately control the drive device. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram illustrating the ground improvement method in the ground improvement system according to this embodiment. [Figure 2] This is a diagram illustrating ground improvement methods. [Figure 3] This is a schematic diagram illustrating the stirring shaft of the ground improvement system according to this embodiment. [Figure 4] This is a schematic diagram illustrating the stirring shaft of the ground improvement system according to this embodiment. [Figure 5] This is a block diagram showing the configuration of the ground improvement system according to this embodiment. [Figure 6A] This is a schematic diagram illustrating the power supply for the ground improvement system according to this embodiment. [Figure 6B] This is a schematic diagram illustrating the power supply for the ground improvement system according to this embodiment. [Figure 7A] This is a schematic diagram illustrating the power supply for the ground improvement system according to this embodiment. [Figure 7B] This is a schematic diagram illustrating the power supply for the ground improvement system according to this embodiment. [Figure 8A] This is a schematic diagram illustrating the power supply for the ground improvement system according to this embodiment. [Figure 8B] This is a schematic diagram illustrating the power supply for the ground improvement system according to this embodiment. [Figure 9] This is a schematic diagram illustrating the power supply for a ground improvement system according to another embodiment. [Modes for carrying out the invention]

[0010] Hereinafter, the construction device 30 and the ground improvement system 10 according to the present embodiment will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the actual ratios.

[0011] (Ground improvement method) FIG. 1 is a diagram for explaining the ground improvement method in the ground improvement system 10 according to the present embodiment. The method to which the ground improvement system 10 is applied in the present embodiment is a two-axis type method for stirring and improving the ground 50 with compressed air, slurry improvement material (solidifying material), and purification material (for example, iron powder, microbial activator, etc.). Note that the method to which the ground improvement system 10 is applied in the present embodiment is not limited to the two-axis type and may be a single-axis type.

[0012] The ground improvement system 10 includes a construction machine main body 20 and a construction device 30. Specifically, the ground improvement system 10 drives the construction device 30 under the control from the construction machine main body 20 based on an operation instruction or the like by the user, and performs ground improvement. In this specification, in the example shown in FIG. 1, the part where the user sits and controls the construction and the part including the leader 22 are described as the construction machine main body 20. Similarly, in this specification, the device including the stirring shaft 33 to be penetrated into the ground is described as the construction device 30.

[0013] The construction machine main body 20 is provided with a leader 22 at the front. The leader 22 supports two stirring shafts 33 via a hoist 31 and a rotating machine 32 with a swivel mechanism, and performs rotation and lifting movements.

[0014] Further, the construction machine main body 20 of the ground improvement system 10 includes a wireless system operation panel 100, an operation panel 200, a second communication control unit 110, a control panel 210, and a battery 220. Details of the wireless system operation panel 100, the operation panel 200, the second communication control unit 110, the control panel 210, and the battery 220 will be described later.

[0015] Data from underground and above ground are displayed via the instrument panel (monitor, display device, etc.) of the control unit provided in the driver's seat of the construction machine body 20, and based on this data, the stirring shaft 33 can be operated by the operation unit in the driver's seat.

[0016] The stirring shaft 33 is vertically supported along the guide portion 22a of the leader 22 by the anti-vibration portion 35 provided below the leader 22 so as to be vertically movable.

[0017] In addition, a rotary shaft 34 equipped with a plurality of stirring blades 37 and excavation bits 36 is connected to the lower end (tip) of the stirring shaft 33. Note that between the lower parts of each stirring shaft 33, a blade (not shown) for controlling the inclination angle so that the descending posture of the stirring shaft 33 becomes vertical is attached. Also, between each rotary shaft 34, a pair of anti-rotation plates (not shown) are respectively attached.

[0018] The elevator 31 has a lifting motor and power transmission means for transmitting the rotational force of the lifting motor to the stirring shaft 33, and raises and lowers the stirring shaft 33 into the ground. That is, the elevator 31 controls the raising and lowering of the stirring shaft 33. Also, the elevator 31 is provided with a hydraulic sensor (not shown) for detecting the hydraulic pressure during the raising and lowering operation of the stirring shaft 33. Also, the elevator 31 is provided with a depth gauge (not shown) for detecting the depth of the lower end of the stirring shaft 33.

[0019] The rotator 32 is a mechanism that includes a rotating motor and rotates the stirring shaft 33 in an arbitrary direction. Specifically, the rotator 32 is provided on the side of the stirring shaft 33 and controls the rotation of the stirring shaft 33. Also, the rotator 32 is provided with a current sensor (not shown) for detecting the current value of the rotating motor.

[0020] The ground improvement system 10 penetrates the stirring shaft 33 to a predetermined depth in the ground by the elevator 31 and the rotator 32. Also, the construction device 30 may be provided with a device (speedometer) for measuring the penetration speed when the stirring shaft 33 is penetrated into the ground.

[0021] Figure 2 is a diagram illustrating the construction method according to this embodiment. In step A in Figure 2, the stirring shaft 33 is positioned in a predetermined location, and the construction device 30 is set in a predetermined location. In step B, the solidifying material is continuously penetrated while being discharged by penetration stirring. In steps C to E, after confirming that the tip has reached the supporting layer (bottoming confirmation), the discharge of the solidifying material is stopped and the tip is treated. In step F, the stirring blade 37 of the stirring shaft 33 is withdrawn while rotating in reverse. In step F, the improved body is constructed down to the ground surface, and the device is moved to the next construction location.

[0022] Figure 3 is a schematic diagram illustrating the stirring shaft 33 of the ground improvement system 10 according to this embodiment. As shown in Figure 3, the stirring shaft 33 is equipped with an air supply pipe 33b for supplying compressed air and an improvement material supply pipe 33a for supplying slurry improvement material such as cement milk. The slurry improvement material corresponds to a solidifying agent.

[0023] A first communication control unit 310 is provided at the upper vertical part of the stirring shaft 33. A solenoid valve (drive device 340) for controlling the opening and closing of the soil improvement material supply pipe 33a and the air supply pipe 33b is provided at the lower vertical part of the stirring shaft 33. Furthermore, a camera 350a for imaging the construction status and an inclinometer 350b are provided at the lower part of the stirring shaft 33. The camera 350a and inclinometer 350b correspond to the sensor 350.

[0024] Figure 4 is a schematic diagram showing the details of the lower part of the stirring shaft 33. As shown in Figure 4, the camera 350a and the inclinometer 350b are connected to the control line 310a. This control line 310a is connected to the first communication control unit 310, and control signals and sensor data are transmitted and received between the first communication control unit 310 and the camera 350a and the inclinometer 350b.

[0025] According to the ground improvement system 10 of this embodiment, the supply amount of compressed air and slurry improvement material can be controlled by opening and closing a solenoid valve (drive device 340), allowing for the construction of solidified piles 51 (see Figure 1) with an appropriate amount of compressed air and slurry improvement material. Furthermore, more appropriate ground improvement can be carried out based on data acquired by the camera 350a and the inclinometer 350b.

[0026] The sensor 350 is not limited to the camera 350a and the inclinometer 350b, but may also be a pH meter, thermometer, pressure gauge, pore water pressure gauge, soil pressure gauge, ground-penetrating radar, non-contact displacement sensor (eddy current type, optical type, ultrasonic type), contact displacement sensor, capacitive sensor, etc.

[0027] As described above, the stirring shaft 33 is mechanically connected to the rotary motor 32 and is a device that penetrates the ground while rotating due to the force transmitted from the elevator 31 and the rotary motor 32. Therefore, in conventional ground improvement systems, it is necessary to stop the rotation of the stirring shaft in order to send power or control signals to the stirring shaft, which is a rotating body. Also, in configurations where measuring instruments such as sensors are attached to the stirring shaft 33, it is necessary to stop the rotation of the stirring shaft 33, which is a rotating body, in order to check the acquired data. Therefore, in conventional configurations, it is difficult to collect data from the stirring shaft 33 in real time during ground improvement work, as well as to control the drive device attached to the stirring shaft 33 and supply power.

[0028] The ground improvement system 10 according to this embodiment enables the supply of power to the stirring shaft 33 and the appropriate control of the drive device 340, even when the stirring shaft 33 is rotating in the ground improvement method described above.

[0029] (Configuration of ground improvement system 10) Next, the details of this ground improvement system 10 will be described. Figure 5 is a schematic block diagram showing the configuration of the ground improvement system 10 according to this embodiment. The ground improvement system 10 consists of a construction machine body 20 and a construction device 30.

[0030] (Configuration of the construction machine unit 20) As shown in Figure 5, the construction machine body 20 is composed of a wireless system control panel 100 and a control panel 200. The wireless system control panel 100 is composed of, for example, a touch panel or a switch box, and transmits and receives data with the construction device 30 via the second communication control unit 110.

[0031] The wireless system control panel 100 acquires information input by the user that relates to the control of the construction device 30. The user corresponds to the operator of the construction machine body 20, which is the ground improvement system 10. The information input by the user is sent to the construction device 30 via the second communication control unit 110.

[0032] Furthermore, the user may obtain information acquired by the sensor 350 provided on the construction device 30 via the second communication control unit 110. In this case, the information acquired via the second communication control unit 110 may be displayed on the wireless system control panel 100 for the user to access. Alternatively, the information acquired via the second communication control unit 110 may be accessed via a display device (not shown) such as a display connected to the second communication control unit 110.

[0033] The control panel 200 is connected to the control panel 210, which controls the elevator 31 and the rotary motor 32. The control panel 210 sends information input by the user as control signals to the elevator 31 and the rotary motor 32, which are located on the upper and side of the stirring shaft 33 of the construction device 30, for controlling them. The battery 220 is a device for storing power to supply to the construction device 30.

[0034] (Configuration of the construction device 30) As shown in Figure 5, the construction device 30 is composed of a lifting device 31, a rotating device 32, and a stirring shaft 33. In this embodiment, the construction device 30 also includes a power supply unit 230.

[0035] The stirring shaft 33 is equipped with a construction control unit 300. The construction control unit 300 is composed of a first communication control unit 310, a power receiving unit 330, a drive unit 340, and a sensor 350. The sensor 350 corresponds to the camera 350a, inclinometer 350b, hydraulic sensor, depth gauge, current sensor, and / or speedometer described above.

[0036] The first communication control unit 310 of the construction control unit 300 transmits and receives data wirelessly with the second communication control unit 110. Specifically, the first communication control unit 310 of the construction control unit 300 drives the drive device 340 based on control instructions from the second communication control unit 110. The first communication control unit 310 of the construction control unit 300 also transmits data acquired by the sensor 350 to the second communication control unit 110. In other words, the first communication control unit 310 and the second communication control unit 110 can communicate with each other wirelessly, and data is transmitted and received bidirectionally.

[0037] The power receiving unit 330 receives power supplied from the construction machine body 20 via the power transmission unit 230. The first communication control unit 310, the drive unit 340, and the sensor 350 are driven based on the power received by the power receiving unit 330.

[0038] Figure 6A is a diagram illustrating the power supply of the ground improvement system 10 according to this embodiment, and schematically shows a side view of the power transmission unit 230, the power receiving unit 330, the power transmission unit 331, and a part of the stirring shaft 33 when viewed from the side. Figure 6B is a diagram illustrating the power supply of the ground improvement system 10 according to this embodiment, and schematically shows a top view of the power transmission unit 230 shown in Figure 6A when viewed from above. The examples shown in Figures 6A and 6B illustrate an example of a trolley-type power supply system.

[0039] As shown in Figures 6A and 6B, the stirring shaft 33 is connected to the power receiving unit 330 and has a power transmission unit 331 at its longitudinal upper end for receiving power received by the power receiving unit 330. That is, the power receiving unit 330 is provided at the top of the stirring shaft 33 via the power transmission unit 331. The power transmission unit 230 corresponds to the trolley wire 230a, which is a contact wire, and is in contact with the power receiving unit 330. Note that the trolley wire 230a and brush unit 230b (see Figures 7A and 7B), which correspond to the power transmission unit 230, will simply be referred to as "power transmission unit 230" unless it is necessary to explain them separately.

[0040] As shown in Figure 6B, the power transmission unit 230, which corresponds to the trolley wire 230a, is configured in a circular shape in plan view, and the power transmission unit 230 and the power receiving unit 330 remain in contact even while the stirring shaft 33 is rotating. Specifically, the power receiving unit 330 moves along the trolley wire 230a in accordance with the rotation of the stirring shaft 33. That is, the power receiving unit 330 receives power transmitted from the power transmission unit 230 while the rotary 32 and / or elevator 31 are being driven.

[0041] As a result, the ground improvement system 10 according to this embodiment can control (drive) the drive device 340 provided on the stirring shaft 33 and collect data from the sensor 350 in real time. In other words, in the ground improvement system 10 according to this embodiment, the drive device 340 and the sensor 350 can be driven when the stirring shaft 33 is rotating.

[0042] Figures 7A and 7B show other configurations of the power transmission unit 230 and power receiving unit 330 of the construction device 30 according to this embodiment. In the example shown in Figures 7A and 7B, the power receiving unit 330 is provided on the upper part of the stirring shaft 33 in a circular shape having a predetermined thickness in the longitudinal direction of the stirring shaft 33. The power transmission unit 230 is composed of a brush portion 230b that contacts the side surface of the power receiving unit 330. In other words, the example shown in Figures 7A and 7B is a slip ring type power supply method in which power can be transmitted to a rotating body by bringing a special brush portion 230b into contact with the surface of a metal ring to conduct electricity.

[0043] In the examples shown in Figures 7A and 7B, the power receiving unit 330 receives power transmitted from the power transmission unit 230 while the rotary 32 and / or elevator 31 are being driven, enabling it to drive the drive unit 340 and the sensor 350. This allows the construction device 30 to control (drive) the drive unit 340 provided on the stirring shaft 33 and collect data from the sensor 350 in real time.

[0044] Figures 8A and 8B show other configurations of the power transmission unit 230 and power receiving unit 330 of the construction device 30 according to this embodiment. In the example shown in Figures 8A and 8B, the power receiving unit 330 is provided in a circular shape on the upper part of the stirring shaft 33, and the power transmission unit 230 is provided in a circular shape on the upper part of the power receiving unit 330. Furthermore, the power transmission unit 230 and the power receiving unit 330 are composed of circular conductors whose distance from the central axis of the stirring shaft 33 is approximately equal. In this embodiment, the central axis of the stirring shaft 33 is the center of the stirring shaft 33 rotated by the rotary 32, and corresponds to the center of a circle in a horizontal plane perpendicular to the longitudinal direction of the cylindrical stirring shaft 33. That is, in the example shown in Figures 8A and 8B, power can be transmitted to the rotating body by being composed of a metal conductive ring in contact with the power transmission unit 230 and the power receiving unit 330.

[0045] In other words, in the examples shown in Figures 8A and 8B, the power receiving unit 330 receives power transmitted from the power transmission unit 230 while the rotary 32 and / or elevator 31 are being driven, enabling it to drive the drive unit 340 and the sensor 350. This allows the construction device 30 to control (drive) the drive unit 340 provided on the stirring shaft 33 and collect data from the sensor 350 in real time.

[0046] In other words, the ground improvement system 10 according to this embodiment can supply power to the construction control unit 300 provided on the stirring shaft 33 without stopping the rotation of the stirring shaft 33, which is a rotating body. Furthermore, since the ground improvement system 10 is supplied with power even when the stirring shaft 33 is being driven, it becomes possible to control (drive) the drive device 340, such as a solenoid valve, provided on the stirring shaft 33 in real time, and to collect data from sensors 350, such as a camera 350a and an inclinometer 350b. In other words, in the ground improvement system 10 according to this embodiment, the drive device 340 and the sensors 350 can be driven when the stirring shaft 33 is rotating.

[0047] As described above, the ground improvement system 10 according to this embodiment is a construction device 30 that is driven by control from the construction machine body 20 and creates solidified piles 51 in a construction method that improves the ground 50 by discharging a solidifying material into the ground. The construction device 30 includes a stirring shaft 33 that penetrates into the ground and discharges the solidifying material, and a rotary motor 32 provided on the side of the stirring shaft 33 and controls the rotation of the stirring shaft 33. The construction device 30 also includes an elevator 31 that controls the raising and lowering of the stirring shaft 33, and a power transmission unit 230 that transmits power sent from the construction machine body 20. The construction device 30 also includes a power receiving unit 330 that is in contact with the power transmission unit 230 and receives power transmitted from the power transmission unit 230 while the rotary motor 32 and / or the elevator 31 are being driven. Furthermore, the construction device 30 includes a first communication control unit 310 that controls a drive unit 340 and a sensor 350 which are driven based on power received by the power receiving unit 330 while the rotary device 32 and / or elevator 31 are being driven.

[0048] As a result, the ground improvement system 10 according to this embodiment can supply power to the stirring shaft 33 and appropriately control the drive device 340 even when the stirring shaft 33 is being driven.

[0049] Furthermore, the power transmission unit 230 of the construction device 30 is composed of a circular trolley wire 230a, and the power receiving unit 330 may move along the trolley wire 230a in accordance with the rotation of the stirring shaft 33. This makes it possible for the construction device 30 to appropriately control the drive unit 340 based on the power supplied to the stirring shaft 33, even while the stirring shaft 33 is rotating.

[0050] Furthermore, the power receiving unit 330 of the construction device 30 may be provided in a circular shape on the upper part of the stirring shaft 33, and the power transmitting unit 230 may be composed of a brush part 230b that contacts the side surface of the power receiving unit 330. This makes it possible for the construction device 30 to appropriately control the drive unit 340 based on the power supplied to the stirring shaft 33, even while the stirring shaft 33 is rotating.

[0051] Furthermore, the power receiving unit 330 of the construction device 30 may be provided in a circular shape on the upper part of the stirring shaft 33, and the power transmitting unit 230 may be provided in a circular shape on the upper part of the power receiving unit 330. This makes it possible for the construction device 30 to appropriately control the drive unit 340 based on the power supplied to the stirring shaft 33, even while the stirring shaft 33 is rotating.

[0052] Furthermore, the first communication control unit 310 and the second communication control unit 110 of the ground improvement system 10 may communicate with each other via wireless communication. This allows the ground improvement system 10 to drive the drive unit 340 even when the mixing shaft 33 is rotating. In addition, the ground improvement system 10 can recognize information acquired by the sensor 350 via the first communication control unit 310 and the second communication control unit 110 even when the mixing shaft 33 is rotating.

[0053] (Other embodiments) While embodiments have been described in detail with reference to the drawings, these embodiments are not limited to those described above. Furthermore, the components described above include those easily conceivable by those skilled in the art, and those that are substantially the same. Moreover, the configurations described above can be combined as appropriate. In addition, various omissions, substitutions, or modifications of the configurations can be made without departing from the spirit of the embodiments.

[0054] For example, in the above-described embodiment, a configuration was shown in which power stored in a battery 220 provided in the construction machine body 20 is transmitted to the power transmission unit 230 of the construction device 30. However, this configuration is not limited to the embodiment. For example, if a power source is provided near the ground improvement system 10, the power source and the power transmission unit 230 of the construction device 30 may be connected by a power line, and power may be transmitted directly from the power source to the power transmission unit 230 of the construction device 30. In this configuration, there is no need to provide a battery 220 in the construction machine body 20, and it is possible to reduce the amount of work required for charging the battery 220.

[0055] Furthermore, in the above-described embodiment, a configuration was described in which the power transmission unit 230 and the power receiving unit 330 are in contact with each other during the transmission of power from the power transmission unit 230 to the power receiving unit 330. For example, the configuration of the construction device 30 is not limited to this configuration, and the power transmission unit 230 and the power receiving unit 330 may be separated while power is transmitted.

[0056] Figure 9 is a diagram illustrating the wireless power supply of the ground improvement system 10 according to this embodiment, and schematically shows a side view of a part of the stirring shaft 33, the power transmission unit 230, and the power receiving unit 330 when viewed from the side.

[0057] As shown in Figure 9, the stirring shaft 33 is connected to the power receiving unit 330 at its upper vertical position and receives power from the power receiving unit 330. The power transmitting unit 230 is located above the power receiving unit 330, at a predetermined distance from the power receiving unit 330. For example, the predetermined distance may be 20 mm. In this embodiment, the predetermined distance is not limited to 20 mm, and may be shorter or longer than 20 mm.

[0058] As shown in Figure 9, the power transmission unit 230 and the power receiving unit 330 are always facing each other, and wireless power transmission (wireless power supply) is performed from the power transmission unit 230 to the power receiving unit 330. Therefore, power is supplied to the stirring shaft 33 at predetermined timings, both when the stirring shaft 33, which is a rotating body, is rotating and when it is stationary.

[0059] Furthermore, the wireless power transfer (wireless power transmission) method according to the other embodiments described above applies a general high-frequency electromagnetic coupling method based on electromagnetic induction. Wireless power transfer methods include high-frequency electromagnetic coupling methods, magnetic field resonance methods, electric field coupling methods, and microwave wireless methods. By applying the high-frequency electromagnetic coupling method as the wireless power transfer method in this embodiment, it becomes possible to achieve wireless power transfer with superior environmental resistance to noise and contamination, as well as high power transfer efficiency, compared to other methods.

[0060] (Effects, etc.) The effects and advantages of this embodiment will be explained below.

[0061] (1) The construction device 30 according to the first aspect of this embodiment is a construction device 30 that is driven by control from the construction machine body 20 and creates solidified piles 51 in a construction method for improving the ground 50 by discharging a solidifying agent into the ground. The construction device 30 comprises a stirring shaft 33 that penetrates into the ground and discharges a solidifying agent, and a rotator 32 provided on the side of the stirring shaft 33 and controlling the rotation of the stirring shaft 33. The construction device 30 also comprises an elevator 31 that controls the raising and lowering of the stirring shaft 33. The construction device 30 also comprises an air supply pipe 33b provided inside the stirring shaft 33 and supplying compressed air, and an improvement material supply pipe 33a provided inside the stirring shaft 33 and supplying solidifying agent. Furthermore, the construction device 30 includes a power transmission unit 230 that transmits power sent from the construction machine body 20, and a power receiving unit 330 that is in contact with the power transmission unit 230 and receives power transmitted from the power transmission unit 230 while the rotary 32 and / or elevator 31 are being driven. The construction device 30 also includes a drive device 340 located at the lower vertical end of the stirring shaft 33, which is driven based on the power received by the power receiving unit 330 and controls the opening and closing of the improvement material supply pipe 33a and the air supply pipe 33b. The construction device 30 also includes a sensor 350 located at the lower vertical end of the stirring shaft 33, which is driven based on the power received by the power receiving unit 330 and captures images of the construction status. Furthermore, the construction device 30 includes a first communication control unit 310 connected to the drive unit 340 and the sensor 350, which controls the drive unit 340 and the sensor 350, which are driven based on the power received by the power receiving unit 330 while the rotary 32 and / or elevator 31 are being driven. The first communication control unit 310 drives the drive unit 340 by a control signal sent wirelessly from the second communication control unit 110 located on the construction machine body 20, and transmits the data acquired by the sensor 350 to the second communication control unit 110 wirelessly.

[0062] This configuration allows the construction device 30 to supply power to the stirring shaft 33 and properly control the drive device 340, even when the stirring shaft 33 is being driven.

[0063] (2) The power transmission unit 230 of the construction device 30 according to the second aspect of this embodiment is composed of a circular trolley wire 230a, and the power receiving unit 330 may move along the trolley wire 230a in accordance with the rotation of the stirring shaft 33.

[0064] This configuration allows the construction device 30 to appropriately control the drive unit 340 based on the power supplied to the stirring shaft 33, even while the stirring shaft 33 is rotating.

[0065] (3) The power receiving section 330 of the construction device 30 according to the third aspect of this embodiment may be provided in a circular shape on the upper part of the stirring shaft 33, and the power transmitting section 230 may be composed of a brush section 230b that is in contact with the side surface of the power receiving section 330.

[0066] This configuration allows the construction device 30 to appropriately control the drive unit 340 based on the power supplied to the stirring shaft 33, even while the stirring shaft 33 is rotating.

[0067] (4) In the fourth aspect of this embodiment, the power receiving unit 330 of the construction device 30 may be provided in a circular shape on the upper part of the stirring shaft 33, and the power transmitting unit 230 may be provided in a circular shape on the upper part of the power receiving unit 330.

[0068] This configuration allows the construction device 30 to appropriately control the drive unit 340 based on the power supplied to the stirring shaft 33, even while the stirring shaft 33 is rotating.

[0069] (5) The ground improvement system 10 according to the fifth aspect of this embodiment is a ground improvement system 10 that includes the above-described construction device 30 and a construction machine body 20 that controls the construction device 30. The construction machine body 20 includes a second communication control unit 110 that sends a control signal to a first communication control unit 310 of the construction device 30 based on user input. The construction machine body 20 also includes a control panel 210 that controls an elevator 31 and a rotary device 32 provided on the construction device 30 based on user operation instructions. Furthermore, the construction machine body 20 includes a battery 220 that transmits power to a power transmission unit 230.

[0070] This configuration allows the ground improvement system 10 to appropriately control the drive unit 340 based on the power supplied to the stirring shaft 33, even when the stirring shaft 33 is being driven.

[0071] (6) The first communication control unit 310 and the second communication control unit 110 of the ground improvement system 10 according to the sixth aspect of this embodiment may be able to communicate with each other by wireless communication.

[0072] This configuration allows the ground improvement system 10 to drive the drive unit 340 even when the mixing shaft 33 is rotating. Furthermore, the ground improvement system 10 can recognize information acquired by the sensor 350 via the first communication control unit 310 and the second communication control unit 110 even when the mixing shaft 33 is rotating. [Explanation of symbols]

[0073] 10. Ground Improvement System 20 Construction machine body 30 Construction equipment 31 Elevators 32 times motive 33 Stirring shaft 34 Rotation axis 100 Wireless System Control Panel 110 Second Communication Control Unit 200 Control panel 210 Control Panel 220 batteries 230 Power Transmission Section 230a Trolley wire 230b Brush section 300 Construction Control Unit 310 First Communication Control Unit 330 Power receiving section 340 Drive unit 350 sensors

Claims

1. In a construction method for improving the ground by creating solidified piles by discharging a solidifying agent into the ground, the construction device is driven by control from the construction machine body and creates the solidified piles, A stirring shaft that penetrates the ground and discharges the solidifying material, A rotating mechanism is provided on the side of the stirring shaft to control the rotation of the stirring shaft, A lifting device that controls the raising and lowering of the stirring shaft, An air supply pipe is provided inside the stirring shaft to supply compressed air, A pipe for supplying the improvement material is provided inside the stirring shaft and supplies the solidifying material, A power transmission unit that transmits power sent from the construction machine body, A power receiving unit that is in contact with the power transmission unit and receives power transmitted from the power transmission unit while the rotating machine and / or elevator is being driven, A drive device is provided at the lower part of the stirring shaft in the vertical direction, and is driven based on the power received by the power receiving unit to control the opening and closing of the pipe for supplying the improvement material and the pipe for supplying the air. A sensor is provided at the lower part of the stirring shaft in the vertical direction, which is driven based on the power received by the power receiving unit and captures images of the construction status. The system includes a first communication control unit which is connected to the drive unit and the sensor, and which drives the drive unit and the sensor based on the power received by the power receiving unit while the rotational and / or elevator is being driven, The first communication control unit drives the drive device by a control signal sent wirelessly from the second communication control unit located in the construction machine body, and transmits the data acquired by the sensor to the second communication control unit wirelessly.

2. The power transmission section is composed of a circular trolley wire, The construction apparatus according to claim 1, wherein the power receiving unit moves along the trolley wire in accordance with the rotation of the stirring shaft.

3. The power receiving unit is provided in a circular shape on the upper part of the stirring shaft. The construction apparatus according to claim 1, wherein the power transmission unit is composed of a brush portion that contacts the side surface of the power receiving unit.

4. The power receiving unit is provided in a circular shape on the upper part of the stirring shaft. The construction apparatus according to claim 1, wherein the power transmission unit is provided in a circular shape on the upper part of the power receiving unit.

5. A ground improvement system comprising a construction device according to any one of claims 1 to 4, and a construction machine body for controlling the construction device, The aforementioned construction machine body is A second communication control unit that sends a control signal to the first communication control unit of the construction device based on user input, A control panel that controls the elevator and the rotating mechanism provided in the construction device according to the user's operating instructions, The system includes a battery that transmits power to the power transmission unit, Ground improvement system.

6. The ground improvement system according to claim 5, wherein the first communication control unit and the second communication control unit are capable of communicating with each other by wireless communication.

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