Excavation device, sound detection system for excavation unit, and corotation determination system for excavation unit

Abstract

To provide an excavation device which makes it easy to identify a rotation state of a relative rotation part.SOLUTION: An excavation device includes: an insertion body 2 configured to be rotatable around a rotation axis and inserted into an excavation object; an excavation part 3 mounted on the insertion body 2 and configured to excavate the excavation object by being rotated together with the insertion body 2; a relative rotation part 4 mounted to be relatively rotatable on the insertion body 2; a sound transmission part 6 configured to execute a transmission operation of transmitting sound generated in conjunction with relative rotation between the relative rotation part 4 and the insertion body 2 to the insertion body 2; and a transmission sound detection part 7 configured to detect transmission sound transmitted to the insertion body 2 by the sound transmission part 6.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an excavation device for excavating the ground or the like, a sound detection system for an excavation unit, and a co-rotation determination system for an excavation unit. [Background technology]

[0002] BACKGROUND ART Conventionally, various excavation devices capable of excavating the ground and the like have been provided, and for example, Patent Document 1 discloses a ground improvement device, which is a type of excavation device.

[0003] The ground improvement device comprises a rotating rod (so-called auger rod) rotated by an excavator (earth auger drive device), an excavation blade attached to the tip of the rotating rod, a co-rotation prevention blade arranged at a predetermined distance above the excavation blade, and a stirring blade arranged at a predetermined distance above the co-rotation prevention blade.

[0004] The drilling blade and the stirring blade are formed to have the same length and are configured to rotate together with the rotation of the rotating rod.

[0005] The anti-co-rotation blade is formed to be longer than the digging blade and the stirring blade, and is configured to be able to rotate relative to the rotating rod.

[0006] When the ground improvement device is excavating the ground, the excavation blades and agitation blades rotate together with the rotating rod, while the anti-rotation blades remain stationary without rotating in the ground because the tip of the blade is embedded in the ground, which is said to prevent the excavated soil in the area from the excavation blade to the agitation blade from rotating as a single unit. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2017-43901 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the above-mentioned conventional ground improvement device, the anti-rotation blades sometimes rotate together with the rotating rod, but it was difficult to know that the anti-rotation blades, which are located in an invisible location, were rotating together with the rotating rod.

[0009] Therefore, in excavation equipment including the above-mentioned ground improvement equipment, it is desirable to make it easier to know the rotation state of relative rotation parts that are used without rotating during excavation, such as the above-mentioned anti-corotation blades.

[0010] In view of the above circumstances, the present invention aims to provide an excavation device that makes it easy to know the rotation state of a relative rotating part, a sound detection system for an excavation unit, and a co-rotation determination system for an excavation unit. [Means for solving the problem]

[0011] The drilling device of the present invention comprises: a penetrating body configured to be rotatable around a rotation axis and inserted into an excavation target; a digging unit attached to the insert and configured to dig the digging target by rotating together with the insert; a relative rotation portion attached to the insertion body so as to be rotatable relative to the insertion body; a sound transmission unit configured to perform a sound transmission operation of generating sound in conjunction with the relative rotation of the relative rotation unit and the insertion body and transmitting the sound to the insertion body; and a transmitted sound detection unit that detects the transmitted sound transmitted to the insertion body by the sound transmission unit.

[0012] According to the drilling device having the above configuration, the sound transmission unit generates a sound that can be used as a criterion for determining the rotational state of the relative rotating part, and transmits the sound to the inserting body.The transmitted sound transmitted to the inserting body is then detected by the transmitted sound detection unit, making it possible to make the sound usable for determining the rotational state of the relative rotating part, thereby making it easier to know the rotational state of the relative rotating part.

[0013] In the drilling device of the present invention, The apparatus may further include a determination device that determines the rotation state of the relative rotation part based on transmitted sound information indicating the transmitted sound detected by the transmitted sound detection unit.

[0014] In this way, the rotation state of the relative rotation part is determined by the determining device, so that the state of the relative rotation part can be easily known.

[0015] The sound detection system for a drilling unit of the present invention comprises: a penetrating body configured to be rotatable around a rotation axis and inserted into an excavation target; a digging unit attached to the insert and configured to dig the digging target by rotating together with the insert; A sound detection system for a drilling unit comprising: a relative rotation part attached to the insert so as to be rotatable relative to the insert; a sound transmission unit configured to perform a transmission operation of generating sound in conjunction with the relative rotation of the relative rotation unit and the insertion body and transmitting the sound to the insertion body; and a transmitted sound detection unit that detects the transmitted sound transmitted to the insertion body by the sound transmission unit.

[0016] According to the sound detection system for a drilling unit having the above configuration, the sound transmission unit generates a sound that can be used as a criterion for determining the rotational state of the relative rotating part, and transmits it to the inserting body.The transmitted sound transmitted to the inserting body is then detected by the transmitted sound detection unit, making it possible to make it usable to determine the rotational state of the relative rotating part, thereby making it easier to know the rotational state of the relative rotating part.

[0017] The determination system for a drilling unit of the present invention comprises: a penetrating body configured to be rotatable around a rotation axis and inserted into an excavation target; a digging unit attached to the insert and configured to dig the digging target by rotating together with the insert; A co-rotation determination system for a drilling unit including a relative rotation part attached to the insert so as to be rotatable relative to the insert, a sound transmission unit configured to perform a transmission operation of generating sound in conjunction with the relative rotation of the relative rotation unit and the insertion body and transmitting the sound to the insertion body; a transmission sound detection unit that detects the transmission sound transmitted to the insertion body by the sound transmission unit; The radio communication system further includes a determination device that determines the rotation state of the relative rotation part based on transmitted sound information indicating the transmitted sound detected by the transmitted sound detection unit.

[0018] According to the judgment system for a drilling unit having the above configuration, the sound transmission unit generates a sound that can be used as a criterion for judging the rotational state of the relative rotation part, and transmits it to the inserting body.The transmitted sound transmitted to the inserting body is then detected by the transmitted sound detection unit, making it possible to make it usable to judge the rotational state of the relative rotation part.This makes it easier to know the rotational state of the relative rotation part, and since the rotational state of the relative rotation part is judged by the judgment device, the state of the relative rotation part can be easily known. [Effects of the Invention]

[0019] As described above, the drilling equipment, the sound detection system for the drilling unit, and the determination system for the drilling unit of the present invention can achieve the excellent effect of making it easier to know the rotation state of the relative rotating part. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic diagram of a drilling rig according to one embodiment of the present invention. [Figure 2]FIG. 2 is an enlarged view of a main part of the excavation equipment according to the embodiment. [Figure 3] FIG. 3 is an explanatory diagram of the length of the drilling blade, the length of the relative rotor blade, and the length of the stirring blade of the drilling device according to the embodiment. [Figure 4] Figure 4 is an explanatory diagram of the operating state of the sound transmission unit of the drilling equipment according to the same embodiment, where (a) is an explanatory diagram of the state before the sound transmission unit performs the transmission operation, (b) is an explanatory diagram of the state while the sound transmission unit is performing the transmission operation, and (c) is an explanatory diagram of the state after the sound transmission unit has performed the transmission operation. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 6 is a block diagram for explaining the configuration of the determination device of the excavation equipment according to the embodiment. [Figure 7] FIG. 7 is an explanatory diagram of a drilling device according to another embodiment of the present invention, in which (a) is an explanatory diagram of the state before the sound transmission unit transmits sound to the inserting body, and (b) is an explanatory diagram of the state when the sound transmission unit transmits sound to the inserting body. [Figure 8] Figure 8 is an explanatory diagram of a drilling device according to yet another embodiment of the drilling device according to the same embodiment, where (a) is an explanatory diagram of the state before the sound transmission unit transmits sound to the inserting body, and (b) is an explanatory diagram of the state when the sound transmission unit transmits sound to the inserting body. [Figure 9] FIG. 9 is an explanatory diagram of a drilling device according to another embodiment of the present invention. [Figure 10] FIG. 10 is an explanatory diagram of a specific example of the dielectric part of the drilling rig according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an excavation device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0022] As shown in FIG. 1, the excavation device is configured to excavate ground G as an excavation target, and is used while attached to a work vehicle V with a crane.

[0023] The crane-equipped work vehicle V comprises a vehicle body V1, a crane V2 attached to the vehicle body V1, and a rotary drive device V3 provided on the crane V2 for rotating the penetrating body 2 described below.

[0024] The drilling device 1 of this embodiment comprises a penetrating body 2 that is configured to be rotatable around a rotation axis and is inserted into the ground G to be drilled (specifically, a drilling hole formed in the ground G); a drilling section 3 that is attached to the penetrating body 2 and configured to drill the ground G by rotating together with the penetrating body 2; a relative rotation section 4 that is attached to the penetrating body 2 so as to be rotatable relative to the penetrating body 2 and is positioned closer to the base end of the penetrating body 2 than the drilling section 3; a stirring section 5 that is attached to the penetrating body 2 so as not to be rotatable relative to the penetrating body 2 and is positioned closer to the base end of the penetrating body 2 than the relative rotation section 4; a sound generation transmission section 6 (see Figure 2) that is configured to perform a transmission operation to transmit sound to the penetrating body 2 in conjunction with the relative rotation of the relative rotation section 4 with respect to the penetrating body 2; a transmission sound detection section 7 that detects the transmission sound transmitted to the penetrating body 2 by the sound generation transmission section 6; and a determination device 8 that determines the rotation state of the relative rotation section 4 based on transmission sound information indicating the transmission sound detected by the transmission sound detection section 7.

[0025] The inserting body 2 has a driving side rod portion 20, one end of which in the axial direction is attached to the rotation driving device V3, and a tip side rod portion 21, which is connected to the other end of the driving side rod portion 20 in the axial direction.

[0026] The driving-side rod portion 20 is configured to rotate about its own central axis when the rotary driving device V3 is driven.

[0027] The tip-side rod portion 21 is connected to the other end of the driving-side rod portion 20 in a concentric state with respect to the driving-side rod portion 20. When the rotation drive device V3 is driven, the tip-side rod portion 21 rotates together with the driving-side rod portion 20 about its own central axis.

[0028] In this way, the inserting body 2 is configured as a single rod by the driving side rod portion 20 and the tip side rod portion 21 connected to the driving side rod portion 20. One end of the inserting body 2 in the axial direction is configured by one end of the driving side rod portion 20, and the other end of the inserting body 2 in the axial direction is configured by the tip side rod portion 21.

[0029] In the following description, one end of the inserting body 2 in the axial direction is referred to as a base end, and the other end of the inserting body 2 in the axial direction is referred to as a tip end.

[0030] The direction corresponding to the axial direction of the inserter 2 is referred to as the axial direction, the circumferential direction around the inserter 2 is referred to as the axial circumferential direction, and the radial direction of the inserter 2 (direction perpendicular to the axial direction) is referred to as the axial radial direction. The direction corresponding to the direction from the base end to the tip end of the inserter 2 in the axial direction is referred to as the forward direction, and the direction corresponding to the direction from the tip end to the base end of the inserter 2 in the axial direction is referred to as the rearward direction.

[0031] As shown in FIG. 2, the excavation unit 3 has an excavation base portion 30 that is fixed to the tip-side rod portion 21 so as not to be rotatable, and excavation wings 31 that extend from the excavation base portion 30.

[0032] The excavation base portion 30 is fixed to the tip surface of the tip side rod portion 21.

[0033] The excavation base portion 30 is provided with a plurality of excavation wings 31 .

[0034] As described above, the drilling base portion 30 is fixed non-rotatably to the tip rod portion 21, so that the drilling base portion 30 and the drilling wing 31 rotate together with the penetrating body 2 when the penetrating body 2 rotates.

[0035] The relative rotation part 4 has a relative rotation base part 40 attached to the tip side rod part 21 so as to be able to rotate relatively to the tip side rod part 21, and a relative rotation blade 41 extending from the relative rotation base part 40.

[0036] The relative rotation base portion 40 is formed in an annular shape, and the tip side rod portion 21 is inserted inside the relative rotation base portion 40. In this embodiment, the tip side rod portion 21 is inserted inside the relative rotation base portion 40 via an annular base portion 22, which will be described later. In addition, the relative rotation base portion 40 is located at a position shifted rearward from the excavation base portion 30.

[0037] The relative rotation base portion 40 is provided with a plurality of relative rotation blades 41 .

[0038] As described above, the relative rotation base portion 40 is attached so as to be rotatable relative to the tip-side rod portion 21. Therefore, in the drilling device 1, when the tip portion of the relative rotating blade 41 penetrates into the ground to be drilled (specifically, the inner peripheral surface of a drilling hole formed in the ground), the relative rotating blade 41 is prevented from rotating relative to the ground, and of the penetrating body 2 and the relative rotating portion 4, only the penetrating body 2 rotates.

[0039] When the relative rotating wing 41 is prevented from rotating relative to the ground, the inserting body 2 rotates relative to the stationary relative rotating part 4. When the relative rotating wing 41 is released from the state of being prevented from rotating relative to the ground and the relative rotating part 4 starts to rotate, the inserting body 2 rotates relative to the rotating relative rotating part 4, and the rotational speed of the inserting body 2 is faster than the rotational speed of the relative rotating part 4 (a so-called co-rotating state). Furthermore, as the rotational speed of the relative rotating part 4 continues to increase, the relative rotating part 4 and the inserting body 2 rotate at the same rotational speed, and the inserting body 2 does not rotate relative to the relative rotating part 4 (a so-called co-rotating state).

[0040] The stirring part 5 has stirring blades 50 extending outward in the axial radial direction from the tip side rod part 21.

[0041] The agitating blade 50 is positioned at a position shifted rearward from the relative rotation base part 40. Therefore, in the excavation device 1 of this embodiment, the excavation part 3 is positioned at the frontmost side, the relative rotation part 4 is positioned behind the excavation part 3, and the agitating part 5 is positioned behind the relative rotation part 4.

[0042] The tip of the mixing blade 50 in the axial radial direction and the tip of the excavating blade 31 in the axial radial direction are located closer to the tip-side rod portion 21 (inner in the axial radial direction) than the tip of the relative rotating blade 41 in the axial radial direction. In other words, the tip of the relative rotating blade 41 is located outward in the axial radial direction from the tip of the mixing blade 50 and the tip of the excavating blade 31 (see FIG. 3).

[0043] The distal rod portion 21 is provided with a plurality of stirring blades 50 .

[0044] In this embodiment, the stirring blade 50 is fixed so as not to rotate relative to the tip-side rod portion 21. Therefore, the stirring blade 50 constituting the stirring unit 5 rotates together with the inserter 2 when the inserter 2 rotates. Furthermore, when the inserter 2 rotates relative to the relative rotation portion 4, the excavation portion 3 and the stirring unit 5 also rotate together with the inserter 2.

[0045] The sound transmission unit 6 has a transmission operation unit 60 configured to perform a transmission operation of transmitting sound to the insertion body 2 (specifically, the tip-side rod portion 21), a transmission transmission unit 61 that outputs an electrical signal in response to the relative rotation between the tip-side rod portion 21 and the relative rotation unit 4, and a transmission control unit 62 that controls the operation of the transmission operation unit 60 based on the electrical signal output by the transmission transmission unit 61.

[0046] 4(a), 4(b), and 4(c), the transmission operation unit 60 includes a housing 600, an insulating cylindrical bobbin 601 disposed in the housing 600, an attraction coil 602 formed of a copper wire wound around the outer circumferential surface of the bobbin 601, a movable core 603 inserted inside the bobbin 601 and slidable along the central axis of the bobbin 601, and a biasing unit 604 that biases the movable core 603, which has slid in a direction to be drawn into the bobbin 601 (drawing direction), in a direction opposite to the drawing direction (counter-drawing direction).

[0047] The attraction coil 602 has a coil body 6020 formed in a spiral shape, and a pair of coil connection parts 6021 each electrically connected to another end of the coil body 6020 .

[0048] The pair of coil connecting portions 6021 are electrically connected to an operation control portion, which will be described later.

[0049] The movable core portion 603 has a shaft-shaped magnetic core body portion 6030 and a flange portion 6031 extending outward in the radial direction of the core body portion 6030 from the entire outer periphery of the core body portion 6030 .

[0050] One end of the core body 6030 in the central axis direction is disposed outside the housing 600. The end face of the one end of the core body 6030 is disposed opposite to the outer circumferential surface of the tip-side rod portion 21.

[0051] The direction in which the movable core part 603 slides is set to match the direction in which one end of the core main body part 6030 moves in the axial direction toward and away from the outer circumferential surface of the tip-side rod part 21. Therefore, when the movable core part 603 moves in the axial direction away from the outer circumferential surface of the tip-side rod part 21, one end of the core main body part 6030 moves away from the outer circumferential surface of the tip-side rod part 21, and when the movable core part 603 moves in the axial direction toward the outer circumferential surface of the tip-side rod part 21, one end of the core main body part 6030 comes into contact with the outer circumferential surface of the tip-side rod part 21.

[0052] The biasing portion 604 of this embodiment is made up of a compression spring, and is disposed between the housing 600 and the flange portion 6031. Therefore, the biasing portion 604 is configured to apply a biasing force to the movable core portion 603 in the direction opposite to the retraction direction when the movable core portion 603 moves in the retraction direction.

[0053] When the movable core portion 603 receives the magnetic force generated by the attraction coil 602, it slides in the retracting direction. At this time, one end of the core body portion 6030 moves away from the outer circumferential surface of the distal rod portion 21. In addition, since the gap between the flange portion 6031 and the housing 600 narrows, the biasing portion 604 is compressed by the flange portion 6031 and the housing 600.

[0054] Then, when the magnetic force generated by the suction coil 602 disappears or weakens, the flange portion 6031 is pushed back in the counter-retraction direction by the biasing portion 604, causing the movable core portion 603 to slide in the counter-retraction direction, and one end of the core body portion 6030 comes into contact with the outer peripheral surface of the tip-side rod portion 21.

[0055] In this way, the transmission operating unit 60 is configured so that by striking the tip side rod portion 21 with the core main body portion 6030, a transmission sound can be generated at the tip end of the inserting body 2 and transmitted to the base end side of the inserting body 2.

[0056] As shown in Figure 2, the transmission transmitter 61 has a coil 610 attached to the tip side rod portion 21, a magnetic body 611 attached to the relative rotating portion 4, and a signal line 612 connected to the coil 610 and the transmission control portion 62.

[0057] 5, the coil 610 of this embodiment is an annular base portion 22 formed in an annular shape, and is attached to the tip-side rod portion 21 via the annular base portion 22 that is fitted and fixed to the outside of the tip-side rod portion 21 and is disposed between the tip-side rod portion 21 and the relative rotation base portion 40. The coil 610 is embedded in the annular base portion 22 in a state where it is exposed to the outside in the axial radial direction from the outer circumferential surface of the annular base portion 22.

[0058] The magnetic body 611 is embedded in the relative rotation base portion 40 in a state where it is exposed from the inner circumferential surface of the relative rotation base portion 40 to the inside in the axial direction.

[0059] The coil 610 and the magnetic body 611 are arranged at the same position in the axial direction, and the coil 610 is arranged more inward than the magnetic body 611 in the axial radial direction. Therefore, when the tip-side rod portion 21 and the annular base portion 22 rotate relative to the relative rotation portion 4, the coil 610 is configured to rotate together with the tip-side rod portion 21 while passing in front of (inside of) the magnetic body 611. The coil 610 is configured to generate an electric signal by electromagnetic induction when passing inside the magnetic body 611.

[0060] In the transmission / transmission unit 61 of this embodiment, two coils 610 are attached to the annular base portion 22, and the two coils 610 are positioned symmetrically with respect to the center line of the tip-side rod portion 21.

[0061] In the transmission transmitting part 61 of this embodiment, four magnetic bodies 611 are attached to the relative rotation base part 40, and the four magnetic bodies 611 are arranged in symmetrical positions with respect to the center line of the tip side rod part 21.

[0062] As shown in FIG. 2, the transmission control section 62 has an operation control section 620 that controls the operation of the transmission operation section 60, and a power supply section 621 that supplies the operation control section 620 with the power required for operation.

[0063] The operation control section 620 is connected to the coil 610 via a signal line 612. The operation control section 620 is also electrically connected to the coil connection section.

[0064] The operation control section 620 is configured to control the operation of the transmission operation section 60 upon receiving an electrical signal from the coil 610, thereby causing the transmission operation section 60 to perform a transmission operation. More specifically, upon receiving an electrical signal from the coil 610, the operation control section 620 is configured to temporarily supply power to the coil connection section 6021, thereby moving the movable core section 603 toward and away from the outer circumferential surface of the tip-side rod section 21 (see FIGS. 4(a), 4(b), and 4(c)).

[0065] In this embodiment, the transmission action section 60 and the transmission control section 62 are installed inside the cover section 23 formed on the distal end side rod section 21.

[0066] As shown in FIG. 6, the transmitted sound detection unit 7 is a piezoelectric sensor 70 attached in contact with the inserting body 2, and includes the piezoelectric sensor 70 that converts the vibration of the inserting body 2 into a voltage and outputs it, and an information output unit 71 that is connected to the piezoelectric sensor 70 and outputs voltage value information indicating the voltage value of the piezoelectric sensor 70.

[0067] In the excavation device 1 of this embodiment, the voltage value information output from the information output unit 71 is processed by a computer, so the information output unit 71 is configured to output the voltage value information as digital information.

[0068] The voltage value of the piezoelectric sensor 70 changes depending on the magnitude of the vibration of the inserting body 2, and the voltage value information indicating the voltage value of the piezoelectric sensor 70 when the sound transmission unit 6 is transmitting the transmitted sound to the inserting body 2 becomes the sound transmission information.

[0069] The determination device 8 is connected to the transmitted sound detection unit 7 so as to be able to communicate information with it, and is configured by a computer.

[0070] The determination device 8 of this embodiment has a transmission sound acquisition unit 80 that acquires transmission sound information from the transmission sound detection unit 7, and a rotation state determination unit 81 that determines the rotation state of the relative rotation unit 4 based on the transmission sound information acquired by the transmission sound acquisition unit 80.

[0071] The transmitted sound information acquired by the transmitted sound acquisition unit 80 is, for example, information indicating the waveform of the transmitted sound detected by the transmitted sound detection unit 7.

[0072] The rotation state determination unit 81 is configured to perform a detection process that detects the presence of transmitted sound based on transmitted sound information, a measurement process that measures the number of transmitted sounds detected by the detection process over a predetermined period of time, and a determination process that determines the rotation state of the relative rotation unit 4 based on the number of transmitted sounds detected by the measurement process.

[0073] In the judgment process, the rotation state judgment unit 81 is configured to compare the number of transmitted sounds detected by the measurement process with a stationary reference value indicating the number of transmitted sounds detected, which is used as a criterion for determining whether the relative rotation part 4 is in a stationary state, and to judge that the relative rotation part 4 is in a stationary state if the number of transmitted sounds detected by the measurement process is the same as the stationary reference value, to judge that the relative rotation part 4 is in a co-rotating state if the number of transmitted sounds detected by the measurement process is less than the stationary reference value and is equal to or greater than 0, and to judge that the relative rotation part 4 is in a co-rotating state if the number of transmitted sounds detected by the measurement process is 0.

[0074] The above is the configuration of the excavation device 1 according to this embodiment. Next, we will explain the operation of the excavation device 1. Note that the operation of the excavation device 1 according to this embodiment will be explained by taking as an example a case in which the excavation device 1 excavates ground G as an excavation target.

[0075] As shown in Fig. 1, the excavation device 1 is used in a state where it is attached to a work vehicle with a crane V. The excavation device 1 is attached to the work vehicle with a crane V by attaching the penetrating body 2 to a rotation drive device V3.

[0076] When the rotary drive device V3 rotates the inserter 2, the excavation part 3 rotates together with the inserter 2, so that when the excavation part 3 is pressed downward against the ground surface, the excavation part 3 can excavate the ground G.

[0077] Then, as the excavation unit 3 continues to move downward (in the direction of advancing excavation), the tip of the relative rotation blade 41 is inserted from the ground surface into the ground G. In this state, the relative rotation unit 4 is prevented from rotating by the ground G, so that the excavation unit 3 and the stirring unit 5 rotate together with the inserter 2, while the relative rotation unit 4 remains stationary and does not rotate. In other words, the inserter 2 rotates relative to the stationary relative rotation unit 4.

[0078] When the rotation prevention of the relative rotating part 4 by the ground G is released, the relative rotating part 4 starts to rotate, and as the rotation speed of the relative rotating part 4 continues to increase, the relative rotating part 4 and the inserting body 2 reach a state where they are rotating at the same rotation speed.

[0079] When the relative rotation part 4 starts to rotate, the time interval during which the coil 610 passes inside the magnetic material 611 becomes longer compared to when the relative rotation part 4 is stationary, so the pitch at which the sound transmission part 6 performs the transmission operation slows down, and the number of transmitted sounds detected by the detection process of the rotation state determination part 81 within a specified time period decreases.

[0080] In the judgment process, the rotation state judgment unit 81 compares the number of transmitted sounds detected by the measurement process with a stillness reference value, and judges that the relative rotating part 4 is in a still state while the number of transmitted sounds detected by the measurement process is the same as the stillness reference value, but judges that the relative rotating part 4 is in a co-rotating state when the number of transmitted sounds detected by the measurement process is less than the stillness reference value and is 0 or greater, and further judges that the relative rotating part 4 is in a co-rotating state when the number of transmitted sounds detected by the measurement process becomes 0.

[0081] In this way, the drilling device 1 of this embodiment generates and acquires a transmitted sound that can be used as a criterion for determining the rotational state of the relative rotating part 4, and is able to determine the rotational state of the relative rotating part 4 using the acquired transmitted sound.

[0082] As described above, according to the drilling device 1 of this embodiment, the sound transmission unit 6 generates a sound that can be used as a criterion for determining the rotational state of the relative rotation part 4 and transmits it to the inserting body 2, and the transmitted sound transmitted to the inserting body 2 can then be acquired by the transmitted sound detection unit 7 and used to determine the rotational state of the relative rotation part 4, thereby achieving the excellent effect of making it easier to know the rotational state of the relative rotation part 4.

[0083] In addition, the drilling device 1 of this embodiment is configured so that the sound transmission unit 6 transmits transmission sound to the inserting body 2 when the inserting body 2 is rotating relative to the stationary relative rotation part 4, or when the inserting body 2 is rotating relative to the rotating relative rotation part 4 and the rotational speed of the inserting body 2 is faster than the rotational speed of the relative rotation part 4, and so that the sound transmission unit 6 does not transmit transmission sound to the inserting body 2 when the relative rotation part 4 and the inserting body 2 are rotating at the same rotational speed and the inserting body 2 is not rotating relative to the relative rotation part 4.Therefore, by checking the presence or absence of transmission sound using the detection result of the transmission sound detection unit 7, it is possible to know whether the relative rotation part 4 is rotating together with the inserting body 2 or not.

[0084] Furthermore, when the inserting body 2 rotates relative to the rotating relative rotating part 4 and the rotation speed of the inserting body 2 is faster than the rotation speed of the relative rotating part 4, the pitch at which the sound transmission part 6 transmits the transmission sound to the inserting body 2 is longer than when the inserting body 2 rotates relative to the rotating relative rotating part 4, compared to when the inserting body 2 rotates relative to the stationary relative rotating part 4.Therefore, by checking the change in the number of detections of the transmission sound using the detection results of the transmission sound detection part 7, it is also possible to know whether the relative rotating part 4 is stationary or rotating together.

[0085] Furthermore, in the excavator 1 of this embodiment, the state of the relative rotation part 4 is automatically determined by the determining device 8, so that the rotation state of the relative rotation part 4 can be easily known.

[0086] The excavation device according to the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0087] The excavation device 1 in the above embodiment is configured to include the insertion body 2, the excavation unit 3, the relative rotation unit 4, the stirring unit 5, the sound transmission unit 6, the transmitted sound detection unit 7, and the determination device 8, but is not limited to this configuration. For example, the excavation device 1 may be configured to include the insertion body 2, the excavation unit 3, the relative rotation unit 4, the stirring unit 5, the sound transmission unit 6, and the transmitted sound detection unit 7.

[0088] Even if the drilling device 1 is not equipped with the determination device 8, if it is configured so that the sound generated by the sound transmission unit 6 is transmitted to the inserting body and the transmitted sound transmitted to the inserting body 2 can be detected by the transmitted sound detection unit 7, the transmitted sound (transmitted sound information) detected by the transmitted sound detection unit 7 can be used to know the rotation state of the relative rotation part 4, making it easier to know the rotation state of the relative rotation part 4.

[0089] Although not specifically mentioned in the description of the excavation unit 3 of the above embodiment, the excavation unit 3 may be configured to have an excavation base unit 30, an excavation blade 31, and a discharge unit for discharging cement milk. In this case, the discharge unit may be provided on the excavation base unit 30. In other words, the excavation device 1 may be a device used to mix excavated soil and cement milk inside an excavated hole in a deep ground improvement method.

[0090] The excavation device 1 in the above embodiment includes the excavation unit 3, the relative rotation unit 4, and the agitation unit 5, but is not limited to this configuration. For example, the excavation device 1 may be configured to include only the excavation unit 3 and the relative rotation unit 4 of the excavation unit 3, the relative rotation unit 4, and the agitation unit 5. In other words, the excavation device 1 only needs to be configured to be able to excavate at least the excavation target.

[0091] The excavation device 1 of the above embodiment has been described as one that excavates the ground G, but it may also be one that excavates something other than the ground G, for example.

[0092] Although the excavation device 1 in the above embodiment excavates downward, the present invention is not limited to this configuration. For example, the excavation device 1 may excavate sideways or upward, or may excavate in a direction that intersects the vertical or horizontal direction.

[0093] Although not specifically mentioned in the description of the drive side rod portion 20 of the above embodiment, the drive side rod portion 20 may be integral from one end to the tip end, or may be configured to be separable in the axial direction.

[0094] Although the transmission / transmission unit 61 in the above embodiment is configured to have two coils 610, the present invention is not limited to this configuration. For example, the transmission / transmission unit 61 may be configured to have one coil 610, or may be configured to have three or more coils 610.

[0095] Although the transmitting / receiving unit 61 in the above embodiment is configured to have four magnetic bodies 611, the present invention is not limited to this configuration. For example, the transmitting / receiving unit 61 may be configured to have one magnetic body 611, two magnetic bodies 611, or three magnetic bodies 611. Furthermore, the transmitting / receiving unit 61 may be configured to have five or more magnetic bodies 611.

[0096] Although not specifically mentioned in the description of the transmitting / receiving unit 61 in the above embodiment, the number of coils 610 and the number of magnetic bodies 611 are different, this is not limiting. For example, the number of coils 610 and the number of magnetic bodies 611 may be the same.

[0097] Although the transmission operation unit 60 in the above embodiment is configured using a solenoid, the configuration is not limited to this. For example, the transmission operation unit 60 may be configured using a stepping motor.

[0098] Although the transmission operation unit 60 in the above embodiment is configured to perform the transmission operation by supplying electric power, the configuration is not limited to this. The transmission operation unit 60 may be configured to perform the transmission operation by rotating together with the insertion body 2.

[0099] For example, the transmission operating unit 60 may be configured to have a rotational operating unit attached to the inserting body 2 and rotating together with the inserting body 2, and a contacted unit that is provided on the relative rotating unit 4 and comes into contact with the rotational operating unit that rotates together with the inserting body 2.

[0100] The rotational operating portion 605 may be configured to have, for example, as shown in Figures 7(a) and 7(b), a support shaft portion 6050 extending outward in the axial direction from the tip-side rod portion 21, and a rotational contact portion 6051 rotatably attached to the support shaft portion 6050, which can come into contact with the relative rotating blade 41 when rotating together with the inserting body 2.

[0101] In this case, the contacted part 606 is formed by the relative rotating part 4 (relative rotating blade 41) itself.

[0102] In the transmission operation part 60 shown in Figures 7(a) and 7(b), when the rotation operation part 605 rotates together with the insertion body 2, the rotation contact part 6051 comes into contact with the relative rotation blade 41, and at this time, a transmission sound is generated in the rotation contact part 6051.

[0103] The transmitted sound generated in the rotary contact portion 6051 is transmitted to the insertion body 2 via the support shaft portion 6050, and can be detected by the transmitted sound detection portion 7.

[0104] Furthermore, the rotational action portion 605 may be configured by a rotational protrusion 6052 attached to the annular base portion 22, as shown in, for example, FIGS. 8(a) and 8(b).

[0105] In this case, the contacted portion 606 may be formed on the relative rotation base portion 40 and may be configured by an interference portion 6060 positioned on the orbit of the rotation convex portion 6052 .

[0106] In the transmission operation part 60 shown in Figures 8(a) and 8(b), when the rotation operation part 605 rotates together with the inserting body 2, the rotation convex part 6052 comes into contact with the interference part 6060, and at this time a transmission sound is generated in the rotation convex part 6052.

[0107] The transmitted sound generated in the rotating contact portion 6051 is transmitted to the insertion body 2 via the annular base portion 22, and can be detected by the transmitted sound detection portion 7.

[0108] Although the information output unit 71 in the above embodiment is configured to output the sound transmission information as digital information, this configuration is not limited thereto. For example, the information output unit 71 may be configured to output voltage value information, which is sound transmission information, or voltage value information other than sound transmission information, as human-visible analog information. In this case, too, the sound transmission information can be used to determine the rotation state of the relative rotation part 4, making it easier to know the rotation state of the relative rotation part 4.

[0109] Although not specifically mentioned in the description of the drilling equipment 1 of the above embodiment, the sound detection system for a drilling unit of the present invention is a system used for a drilling unit configured to include the inserting body 2, drilling section 3, and relative rotation section 4 described in the above embodiment, and may be a system configured to include the sound generation transmission section 6 and transmitted sound detection section 7 described in the above embodiment.

[0110] According to the sound detection system for a drilling unit having the above configuration, the sound transmission unit 6 generates a sound that can be used as a criterion for determining the rotational state of the relative rotation part 4 and transmits it to the inserting body 2, and the transmitted sound transmitted to the inserting body 2 is then detected by the transmitted sound detection unit 7, making it possible to make it usable to determine the rotational state of the relative rotation part 4, thereby making it easier to know the rotational state of the relative rotation part 4.

[0111] Although not specifically mentioned in the description of the drilling device 1 of the above embodiment, the judgment system for a drilling unit of the present invention is a system used for a drilling unit configured to include the insertion body 2, drilling section 3, and relative rotation section 4 described in the above embodiment, and it is sufficient that the system is configured to include the sound transmission section 6, transmission sound detection section 7, and judgment device 8 described in the above embodiment.

[0112] According to the judgment system for a drilling unit having the above configuration, a sound that can be used as a criterion for judging the rotational state of the relative rotation part 4 is generated by the sound transmission part 6 and transmitted to the inserting body 2, and the transmitted sound transmitted to the inserting body 2 is then detected by the transmitted sound detection part 7, so that it can be used to judge the rotational state of the relative rotation part 4, making it easier to know the rotational state of the relative rotation part 4, and since the rotational state of the relative rotation part 4 is judged by the judgment device 8, the state of the relative rotation part 4 can be easily known.

[0113] The transmission-transmission unit 61 in the above embodiment is configured to have, in addition to the coil 610 and the signal line 612, a dielectric part that changes the magnetic flux around the coil 610 as it passes outside the coil 610 in accordance with the relative rotation of the tip-side rod part 21 and the relative rotation part 4. In the description of the transmission-transmission unit 61 in the above embodiment, the magnetic body 611 attached to the relative rotation part 4 was given as an example of a dielectric part, but the dielectric part does not have to be composed of the magnetic body 611.

[0114] 9 and 10, for example, the dielectric portion 613 may be configured as an opening formed in the relative rotation portion 4 (the relative rotation portion 4 configured of a magnetic material). In this case, the dielectric portion 613 can change the magnetic flux around the coil 610 while passing outside the coil 610 in accordance with the relative rotation between the tip side rod portion 21 and the relative rotation portion 4. Therefore, even in the transmitting / receiving portion 61 configured in this manner, an electric signal can be generated by electromagnetic induction when the coil 610 passes inside the magnetic material 611 in accordance with the relative rotation between the tip side rod portion 21 and the relative rotation portion 4.

[0115] The dielectric portion 613 may be made of a material different from that of the relative rotation portion 4 and may be configured as a blocking portion configured to block an opening formed in the relative rotation portion 4. Even in this case, the dielectric portion 613 can change the magnetic flux around the coil 610 while passing outside the coil 610 in accordance with the relative rotation of the tip side rod portion 21 and the relative rotation portion 4. Therefore, even in the transmitting / receiving portion 61 configured as above, an electric signal can be generated by electromagnetic induction when the coil 610 passes inside the magnetic body 611 in accordance with the relative rotation of the tip side rod portion 21 and the relative rotation portion 4. [Explanation of symbols]

[0116] 1...Drilling device, 2...Piercing body, 3...Drilling section, 4...Relative rotation section, 5...Agitating section, 6...Sound generation transmission section, 7...Transmission sound detection section, 8...Determination device, 20...Drive side rod section, 21...Tip side rod section, 22...Annular base section, 30...Drilling base section, 31...Drilling blade, 40...Relative rotation base section, 41...Relative rotation blade, 50...Agitating blade, 60...Transmission operation section, 61...Transmission transmission section, 62...Transmission control section, 70...Piezoelectric sensor, 71...Information output section, 80...Transmission sound acquisition section, 81...Rotation state determination section, 6 00...housing, 601...bobbin, 602...attraction coil, 603...movable core portion, 604...energizing portion, 605...rotational movement portion, 606...contacted portion, 610...coil, 611...magnetic material, 612...signal line, 613...dielectric portion, 620...movement control portion, 6021...coil connection portion, 6030...core main body portion, 6031...flange portion, 6050...support shaft portion, 6051...rotational contact portion, 6052...rotational convex portion, G...ground, V...work vehicle with crane, V1...vehicle body, V2...crane, V3...rotational drive device

Claims

1. a penetrating body configured to be rotatable around a rotation axis and inserted into an excavation target; a digging unit attached to the insert and configured to dig the digging target by rotating together with the insert; a relative rotation portion attached to the insertion body so as to be rotatable relative to the insertion body; a sound transmission unit configured to perform a transmission operation of generating sound in conjunction with the relative rotation of the relative rotation unit and the insertion body and transmitting the sound to the insertion body; and a transmission sound detection unit that detects the transmission sound transmitted to the insertion body by the sound transmission unit. Drilling equipment.

2. a determination device for determining the rotation state of the relative rotation part based on transmitted sound information indicating the transmitted sound detected by the transmitted sound detection unit, 10. The drilling rig of claim 1.

3. a penetrating body configured to be rotatable around a rotation axis and inserted into an excavation target; a digging unit attached to the insert and configured to dig the digging target by rotating together with the insert; A sound detection system for a drilling unit comprising: a relative rotation part attached to the insert so as to be rotatable relative to the insert; a sound transmission unit configured to perform a transmission operation of generating sound in conjunction with the relative rotation of the relative rotation unit and the insertion body and transmitting the sound to the insertion body; and a transmission sound detection unit that detects the transmission sound transmitted to the insertion body by the sound transmission unit. Sound detection system for drilling units.

4. a penetrating body configured to be rotatable around a rotation axis and inserted into an excavation target; a digging unit attached to the insert and configured to dig the digging target by rotating together with the insert; A co-rotation determination system for a drilling unit including a relative rotation part attached to the insert so as to be rotatable relative to the insert, a sound transmission unit configured to perform a transmission operation of generating sound in conjunction with the relative rotation of the relative rotation unit and the insertion body and transmitting the sound to the insertion body; a transmission sound detection unit that detects the transmission sound transmitted to the insertion body by the sound transmission unit; a determination device for determining the rotation state of the relative rotation part based on transmitted sound information indicating the transmitted sound detected by the transmitted sound detection unit, Co-rotation determination system for drilling units.

Images