JP6356953B2 - Earth auger device - Google Patents

Description

  The present invention relates to an earth auger device that is swingably attached to, for example, a boom of an excavated pillar car and that hangs down from the tip of the boom to excavate the ground.

  An excavation pillar car is configured by a boom that is provided on a swivel that is provided on a vehicle body so as to be capable of swinging and retracting and extending and retracting, and an earth auger device is attached to the tip of the boom (for example, (See FIG. 6 of Patent Document 1). For this reason, the digging pillar car can excavate the building pillar hole into which the utility pole is built by rotating the earth auger device while lowering and reducing the boom. In addition, the swiveling movement of the swivel base is performed by operating a hydraulic swing motor, the boom hoisting movement is performed by operating a hydraulic hoisting cylinder, and the boom telescopic movement is performed by operating a hydraulic telescopic cylinder. It is like that.

  When excavating using an earth auger device, the earth auger device is pressed against the ground by the force that causes the boom to fall over by the hoisting cylinder. There is a risk of damaging the buried object. Therefore, conventionally, before excavating by driving the earth auger device (hereinafter, this operation is referred to as “main excavation”), the operator excavates about 1.5 m using a scoop or the like to check whether there is an embedded object. (Hereafter, this work is referred to as “trial drilling”).

Japanese Patent Laid-Open No. 10-212885

However, since this trial digging work is performed manually in order not to damage the buried object, there is a problem that the burden on the operator is heavy and the work efficiency of the trial digging work is reduced due to the time required for the trial digging work. It was.

  This invention is made | formed in view of such a subject, and it aims at providing the earth auger apparatus which can reduce the work burden of trial digging work and can improve the work efficiency of trial digging work.

In order to achieve such an object, an earth auger device according to the present invention includes an auger motor suspended from at least a tip of a boom that can freely move up and down, and a test auger device driven by the auger motor (for example, An earth auger device 40 for trial digging in the embodiment, a drive control means for controlling the operation of the auger motor by controlling the operation of the auger motor (for example, the controller 410 in the embodiment), and Drive state detection means (for example, the embedded object detector 408 in the embodiment) for detecting the drive state is provided. The trial auger apparatus is provided with a shaft member that is rotationally driven by the auger motor, and is slidably movable in the axial direction on the shaft member, and is integrated with the shaft member while being slidable in the axial direction. A trial auger member that rotates in a general manner and excavates the ground, and the drive control means controls the drive of the trial auger apparatus according to the detection result of the drive state detection means (for example, an embodiment) (Control by the trial digging mode S).
In the above-described earth auger device, the trial auger device includes an operation handle provided so as to be relatively rotatable with respect to the trial auger member , and the auger motor rotates the trial auger member via the shaft member. In addition, it is preferable that the operation handle is pressed downward to apply a downward pressing force to the trial auger member to excavate the ground.

  In the above-described earth auger device, the drive state detection unit is configured to detect a drive torque of the auger motor, and the drive state detection unit has a predetermined drive torque detected by the drive state detection unit. When the driving torque (for example, the regulation torque value T2 in the embodiment) or more is reached, it is preferable to regulate the operation of the auger motor to regulate the driving of the trial auger device.

  Further, the drive state detection means is configured to detect the drive torque of the auger motor, and the drive state detection means has a change amount per unit time of the drive torque detected by the drive state detection means. It is also preferable that when the predetermined change amount (for example, the drive torque change amount T3 in the embodiment) is greater than or equal to the operation of the auger motor, the drive of the trial auger device is restricted.

  Furthermore, the drive state detection means is configured to detect a slide movement position of the trial auger member in the axial direction, and the drive state detection means is a slide movement detected by the drive state detection means. When the change amount of the position per unit time is equal to or less than a predetermined change amount, the operation of the auger motor may be restricted to restrict the drive of the trial auger device.

  Further, the driving state detecting means is configured to detect a vibration amplitude of the trial auger device, and the driving state detecting means is configured such that the vibration amplitude detected by the driving state detecting means is a predetermined vibration amplitude. It is also preferable to restrict the operation of the auger motor to restrict the drive of the test auger device when it is out of the range (for example, the vibration lower limit value VL to the vibration upper limit value VU in the embodiment).

  In addition, the driving state detection unit is configured to detect a vibration amplitude of the trial auger device, and the driving state detection unit is configured to detect a vibration amplitude detected by the driving state detection unit per unit time. When the amount of change is equal to or greater than a predetermined amount of change, the operation of the auger motor may be restricted to restrict the drive of the trial auger device.

In the above-mentioned earth auger device, the boom is provided on a vehicle body, and a first operation means (for example, the first operation device 6 in the embodiment) is provided on the vehicle body to perform an operation for driving the trial auger device. ) And second operation means (for example, the second operation device 701 in the embodiment) configured to be portable and operated to drive the trial auger apparatus, the drive control means includes the trial excavation When the control for driving the auger device is performed, the drive according to the operation of the first operation means is restricted, and the control to perform the drive according to the operation of the second operation means is possible. preferable.

  The earth auger apparatus according to the present invention is configured to be capable of controlling the driving of the trial auger apparatus in accordance with the detection result of the driving state detecting means. When the auger device for trial digging comes into contact with the buried object during the trial digging, the driving state (for example, driving torque) of the auger device for trial digging changes. It is possible to detect contact with the touch panel. For this reason, if the drive of the trial auger device is regulated according to the drive state of the trial auger device detected by the drive state detection means, the trial work can be performed without damaging the buried object. Moreover, since the auger apparatus for trial digging of the earth auger apparatus according to the present invention is driven by the auger motor, the trial digging work can be performed efficiently while reducing the work load.

It is a perspective view of a digging pillar car to which the present invention is applied. It is a disassembled perspective view of the earth auger apparatus for main excavation. It is a disassembled perspective view of the state which attached the earth auger apparatus for trial digging to the lower end of the earth auger apparatus for main digging. It is a disassembled perspective view of the earth auger apparatus for trial digging. It is sectional drawing of the earth auger apparatus for trial digging. (A) is sectional drawing of VI (a) -VI (a) part in FIG. 4, (b) is a side view of the lower excavation blade part for trial excavation shown in FIG. It is a side view which shows the test excavation work performed by attaching the earth excavation earth auger device to the lower end of the main excavation earth auger device. It is a figure which shows the positional relationship of the upper excavation blade part for trial digging, and an embedded object, Comprising: (a) is a top view, (b) is a side view. It is a disassembled perspective view of the structure which attaches the earth auger apparatus for trial digging directly to a transmission. It is a perspective view which shows the modification of the upper excavation blade part for trial digging, and the lower excavation blade part for trial digging. (A) is sectional drawing of the IX (a) -IX (a) part in FIG. 10, (b) is a side view of the lower end shaft member shown in FIG. It is the table | surface which showed the combination pattern of the upper excavation blade part for trial digging, an accommodation cylinder member, and the lower excavation blade part for test excavation / a lower end shaft member. It is sectional drawing of the earth auger apparatus for trial digging as a modification. It is a side view of the earth auger apparatus for trial digging concerning the modification different from FIG. It is sectional drawing of the XV-XV part in FIG. It is sectional drawing of the XVI-XVI part in FIG. It is the side view which showed the rotation roller apparatus typically. It is sectional drawing which represented the structure shown in FIG. 15 typically. It is a block diagram which shows the control system of the said digging pillar car. It is a hydraulic circuit of the said digging pillar car. It is a graph which shows an example of the detected torque. It is a graph which shows another example of the detected torque. It is a graph which shows an example of the detected slide position. It is a graph which shows an example of the detected vibration. It is a graph which shows another example of the detected vibration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, with reference to FIG. 1 and FIG. 19, the structure of the digging pillar car 1 to which the present invention is applied will be described.

  FIG. 1 shows a state in which the digging column car 1 is viewed from the diagonally left rear, and as can be seen from FIG. 1, the digging column car 1 travels with tire wheels 2 on the front, rear, left and right. This is possible and is based on a truck vehicle having a driving cab 3 at the front. On the vehicle body 4 of this truck vehicle, there is disposed a swivel base 11 that is driven by a hydraulic swivel motor SM and configured to be able to turn horizontally around the vertical axis. A base 13 is pivotally connected to the swivel base 11 and a boom 13 is attached. The boom 13 is moved up and down by a hydraulic hoisting cylinder 12 provided across the swivel base 11 and the boom 13. It is like that. The boom 13 is configured to be telescopically movable by a hydraulic telescopic cylinder SS by combining a proximal boom 13a, an intermediate boom 13b, and a distal boom 13c in a nested manner.

  An auger support 14 is attached to the boom 13 so as to be slidable in the longitudinal direction. A hydraulic auger motor 21 and a reduction gear mechanism (not shown) are built in the housing below the auger support 14. A speed reducer 22 having an output shaft that decelerates and outputs the rotational driving force of 21 is attached in a swingable manner. A main excavation earth auger device 15 is provided below the speed reducer 22, and the main excavation earth auger device 15 is connected to an output shaft of the speed reducer 22 by a joint member 23. The auger support 14 is configured to be selectively connectable to the distal end portion of the distal end boom 13c and the distal end portion of the proximal end boom 13a. As shown in FIG. 1, the auger support 14 is connected to the distal end portion of the distal end boom 13c, and excavation work is performed by the main excavation earth auger device 15, while the auger support 14 is connected to the distal end portion of the proximal boom 13a. The earth auger device 15 is stored. A winch 16 that feeds and winds the wire 17 disposed along the axial direction of the boom 13 is provided at the upper portion on the proximal end side of the proximal boom 13a. The winch 16 is driven by a hydraulic winch motor UM.

  A boom head 18 is attached to the tip of the tip boom 13c, and a sheave (not shown) is rotatably attached to the inside of the boom head 18. The wire 17 fed out from the winch 16 hangs downward through a sheave in the boom head 18. The wire 17 that hangs downward from the boom head 18 is wound around a movable pulley of a hook 19, and its tip is fixed in the boom head 18. Therefore, the hook 17 can be pulled up and down by feeding and winding the wire 17 by the winch 16.

  As shown in FIG. 1, outriggers 5 that are telescopically retractable are provided at four positions in the front, rear, left, and right of the vehicle body 4, and when performing excavation work for building pole holes or building pole work for utility poles, the outriggers 5 project downward. Thus, the vehicle body 4 can be lifted and supported. Further, a first operating device 6 is provided on the vehicle body 4, and by operating the first operating device 6, the swiveling movement of the swivel base 12, the raising and lowering motion of the boom 13, and the grounding for main excavation are provided. The rotation movement of the auger device 15 and the rotation movement of the winch 16 can be performed.

  FIG. 2 shows a state in which the main excavation earth auger device 15 is disassembled. As can be seen from FIG. 2, the main excavation earth auger device 15 is formed with a plurality of set holes 25 arranged in the axial direction. The prism shaft 24 and a main excavation earth auger 26 into which the prism shaft 24 is inserted.

  The main excavation earth auger 26 includes an auger main body 27, an upper excavation blade 32 for main excavation attached to the lower end of the auger main unit 27, and a book attached to the lower end of the upper excavation blade 32 for main excavation. It comprises an intermediate excavation blade portion 33 for excavation and a lower excavation blade portion 34 for main excavation attached to the lower end of the intermediate excavation blade portion 33 for main excavation. The auger body 27 includes a shaft 28 having an insertion space 30 that fits into the prismatic shaft 24, and an auger screw that is helically attached around the shaft 28 and rotates in the excavation direction to convey the excavated earth and sand upward. 29 and a set pin handle 31 attached to the upper portion of the shaft portion 28. The main excavation upper excavation blade portion 32, the main excavation intermediate excavation blade portion 33, and the main excavation lower excavation blade portion 34 include an excavation blade (not shown) having a sharp cross-sectional view so that the ground can be efficiently excavated. It is configured.

  Here, the assembly configuration of the main excavation earth auger device 15 will be described. The prismatic shaft 24 is fitted and inserted into the insertion space 30 of the auger body 27, and the set pin handle 31 is operated to fit the tip of the set pin handle 31 into any of the plurality of set holes 25. A prismatic shaft 24 is attached to the auger main body 27. The upper part of this prismatic shaft 24 is connected to the output shaft of the speed reducer 22 via the joint member 23. Since the prismatic shaft 24 is fitted in the insertion space 30, when the auger motor 21 is driven to rotate, the prismatic shaft 24 and the main excavation earth auger 26 can be rotated integrally.

  As shown in FIG. 3, the main excavation earth auger device 15 can be attached with the test excavation earth auger device 40 by removing the main excavation intermediate excavation blade portion 33 and the main excavation lower excavation blade portion 34. It has become. FIG. 4 shows a state in which the ground excavation ground auger device 40 is disassembled, and FIG. 5 shows a cross-sectional view of the ground excavation ground auger device 40. As can be seen from these figures, A test excavation prismatic shaft 41 with a storage hole 42a formed at the top and a retaining pin 42b attached at the bottom, a test excavation earth auger 43 into which the test excavation prismatic shaft 41 is inserted, and a cylindrical shape. From the cylindrical member 50 attached so as to cover the ground auger 43 for trial digging, the vibration device 60 detachably attached to the cylindrical member 50, and the operation handle 70 detachably attached to the cylindrical member 50. Composed.

  The ground excavation ground auger 43 includes an auger main body 44, a test excavation upper excavation blade 80 attached to the lower end of the auger main body 44, and a test excavation lower side attached to the lower end of the test excavation upper excavation blade 80. It is comprised from the excavation blade part 90. FIG. The auger main body 44 includes a shaft portion 45 having an insertion space 47 to be fitted to the trial excavation prismatic shaft 41, a pair of flange portions 46 formed on the shaft portion 45 at intervals in the axial direction, The lock pin 48 for storage attached to the upper part, and the auger screw 49 attached to the circumference | surroundings of the axial part 45 spirally, and rotating to a digging direction and conveying excavated earth and sand are comprised.

  As shown in FIG. 4, the test excavation upper excavation blade portion 80 includes a shaft portion 81 attached to the lower end portion of the auger main body portion 44, a plate-like base portion 82 extending in a radial direction from the shaft portion 81, and a base portion And a stepped excavating blade 83 formed in a step shape at the lower end of 82. The end portion 84 of the stepped excavation blade 83 is formed in an R shape so as not to damage the buried object during the trial excavation.

  FIG. 6A shows a cross section of the lower digging blade 90 for trial digging, and FIG. 6B shows the state of the lower digging blade 90 for trial digging viewed from the side. As can be seen, the test excavation lower excavation blade portion 90 is formed by extending two arc excavation blades 92 having an arc shape in cross section around the blade body portion 91 and extending in a spiral shape in the axial direction. In addition, the lower end of the test excavation lower excavation blade 90 has one arc excavation blade 92 bent from the front side of the paper to the rear side, and the other arc excavation blade 92 is directed from the rear side of the paper to the front side. It is configured so that it will not bend and damage the buried object during trial digging.

  As shown in FIG. 5, the cylindrical member 50 includes a cylindrical main body portion 51 formed in a cylindrical shape, a flange portion 52 formed to protrude in the radial direction at both upper and lower end portions of the cylindrical main body portion 51, and a flange portion 52. The bearing member 53 is attached to the inside of the tube body, and a plurality of handle attachment portions 54 are provided on the side surface of the cylinder main body portion 51 so as to be arranged in the axial direction.

  Although detailed illustration is omitted, the vibration device 60 includes an electric or hydraulic motor and a pair of eccentric weights that are rotationally driven by the motor, and the eccentric weights are driven to rotate by the motor. Further, it is configured to be able to generate vertical vibrations.

  As shown in FIG. 5, the operation handle 70 includes a handle portion 71 bent in a crank shape and a flat engagement portion 72 attached to the tip of the handle portion 71. The operation handle 70 can be detachably attached to the tubular member 50 by inserting the engaging portion 72 into the gap 55 between the handle attachment portion 54 and the cylinder main body portion 51 from above. Yes.

  Here, the assembly configuration of the ground auger device 40 for trial digging will be described. First, as shown in FIG. 4, the upper end of the test excavation prismatic shaft 41 is attached to the upper excavation blade portion 32 for main excavation. In a state where the storage lock pin 48 is pulled out to the front, the test excavation prismatic shaft 41 is fitted and inserted into the insertion space 47 of the auger body 44 so as to be slidable up and down. Therefore, the auger main body portion 27, the main excavation upper excavation blade portion 32, and the test excavation earth auger 43 in a state where the auger main body portion 44 (cylindrical member 50) is slidable in the axial direction with respect to the test excavation prismatic shaft 41. Are rotated together. On the other hand, the cylindrical member 50 is rotatably attached via a bearing member 53 between the pair of flange portions 46 to the auger body portion 44 (shaft portion 45) that is rotationally driven. It should be noted that the retaining pin 42b provided on the test excavation prismatic shaft 41 is configured to be engageable with an engaging portion (not shown) provided in the upper portion of the insertion space 47, and is engaged with the retaining pin 42b. The grounding auger 43 for trial digging is prevented from falling off from the prismatic shaft 41 for digging due to the engagement with the joint. Further, by inserting the distal end portion of the storage lock pin 48 into the storage hole 42a provided in the test excavation prismatic shaft 41, the test excavation earth auger 43 can be held at the storage position.

  Heretofore, the configuration of the digging column car 1 has been described. In the following, with respect to the operation of the digging pillar car 1, first, a trial digging earth auger device 40 is attached to the lower end of the main digging earth auger device 15, and a trial digging operation is performed. The case where the ground excavation earth auger device 40 is removed from 15 and the main excavation work is performed to excavate the pillar hole H will be described as an example.

  Prior to the trial excavation work, first, the auger support 14 is connected to the distal end portion of the tip boom 13c, and the main excavation earth auger device 15 is swung so as to be in an upright state. In this state, the main excavation intermediate excavation blade 33 and the main excavation lower excavation blade 34 are removed from the main excavation earth auger device 15 and replaced with the test excavation earth auger device 40 (see FIG. 7). Then, after raising and lowering the boom 13 so that the lower digging blade 90 for trial digging touches the ground by its own weight such as the ground auger 43 for trial digging, the cylindrical member 50 and the vibration device 60, the operation of the boom 13 is stopped. In this state, the auger motor 21 is rotationally driven to perform a trial digging operation. As a result, the prismatic shaft 24, the auger body 27, the main excavation upper excavation blade 32, the test excavation prismatic shaft 41, and the test excavation earth auger 43 are integrally rotated, and the test excavation upper excavation blade 80 and the test excavation. The ground is excavated by the lower excavating blade 90 and the excavated soil is conveyed upward by the auger screw 49.

  At this time, as shown in FIG. 7, if the operator M grasps the operation handle 70 and presses it downward, a downward pressing force is applied to the tubular member 50 in a state where the rotation of the tubular member 50 is restricted. be able to. The force acting on the tubular member 50 is transmitted to the flange portion 46 of the auger main body 44 via the flange portion 52 of the tubular member 50, and a downward pressing force is applied to the ground excavation ground auger 43. it can. Thus, the grounding auger 43, the tubular member 50, the vibration device 60, and the operation handle 70 can be integrally pushed downward with respect to the trial excavation prismatic shaft 41 to excavate the ground.

  As described above, the ground excavation ground auger apparatus 40 according to the present invention performs the trial excavation work by using the rotational driving force of the auger motor 21, so that the work efficiency of the worker M is reduced while reducing the work load. Can be improved. Further, since the operator M can adjust the force for pressing the ground excavation earth auger 43 against the ground by operating the operation handle 70, the operator M pushes the operation handle 70 downward when there is a touch in contact with the buried object. If the force to do is weakened, damage to the buried object can be prevented. Further, since the arc excavation blade 92 is formed at the ridge line portion and the lower end portion of the lower excavation blade portion 90 for test excavation, the excavation is performed with a force obtained by applying the pressing force of the operator M to the own weight of the test excavation earth auger 43 and the like. Sometimes, even if the lower excavation blade portion 90 for trial digging contacts the buried object, damage to the buried object can be prevented.

  Further, as shown in FIG. 8A, since the end portion 84 of the stepped excavation blade 83 constituting the upper excavation blade portion 80 for trial digging is formed in an R shape, the upper excavation blade portion 80 for trial excavation is formed during the trial excavation. Even if it contacts the embedded object P, damage to the embedded object P can be prevented. Further, as shown in FIG. 8B, since the stepped excavation blade 83 is formed in a step shape, for example, compared to a case where the excavation blade is formed in a straight shape instead of a step shape, the embedded object P Since the test excavation earth auger 43 and the tubular member 50 are vibrated up and down when they come into contact with each other, the worker M can detect the presence of the buried object P as a touch. Furthermore, since the staircase-shaped excavation blade 83 is formed in a staircase shape, the ground can be efficiently excavated and the work efficiency of the test excavation work can be improved.

  As the test excavation work of the building pillar hole H progresses from state A to state B shown in FIG. 7, the operation handle 70 is replaced with the upper handle mounting portion 54, so that the building pillar is about 1.5 m in an easy-to-work posture. The hole H can be tested. In addition, when a trial digging operation is performed while driving the vibration device 60, the excavation can be efficiently performed by the vibration of the vibration device 60.

  When the excavation work is performed as described above and it is determined that there is no buried object at the excavation site, the boom 13 is raised and lowered to take out the exploration earth auger device 40 from the ground, and the main excavation earth auger. The ground excavation ground auger device 40 is removed from the device 15 and replaced with the main excavation intermediate excavation blade portion 33 and the main excavation lower excavation blade portion 34. Then, while the auger motor 21 is rotated, the boom 13 is tilted down and contracted, and the main excavation earth auger device 15 is built into the building pillar hole H excavated by the above-described trial excavation work, and the main excavation work is performed. Drill a deep pillar hole H of depth.

  In the above-described embodiment, the configuration in which the trial digging earth auger device 40 is attached to the lower end of the main digging earth auger device 15 to perform the trial digging has been described, but other than this configuration, for example, the configuration shown in FIG. 9 is possible. . In other words, it is possible to directly connect the trial drilling prism column 41 of the trial earthing auger device 40 to the output shaft of the speed reducer 22 via the joint member 23 (refer to FIG. 5 for a cross section of the grounding earth auger device 40 for testing). ). Even in this configuration, the operator M can perform trial digging while adjusting the force for pressing the trial digging earth auger 43 against the ground by operating the operation handle 70.

  In the above-described embodiment, the test excavation earth auger 43 configured by attaching the test excavation upper excavation blade part 80 and the test excavation lower excavation blade part 90 has been described as an example, but the test excavation earth auger is limited to this configuration. Not. For example, as shown in FIG. 10, an upper excavation blade portion 150 for trial digging is used instead of the upper excavation blade portion 80 for trial excavation, and a lower excavation blade portion 180 for trial excavation is used instead of the lower excavation blade portion 90 for trial digging. The configuration used may be used.

  The test excavation upper excavation blade portion 150 includes a shaft portion 151 attached to the lower end of the auger body portion 44, a connecting portion 152 extending in the radial direction from the shaft portion 151, and an excavation formed in an uneven shape at the end portion of the connecting portion 152. The blade 153 is composed of a ring-shaped main body 154 connected to the radial end of the connecting portion 152, and a plurality of protruding excavation blades 155 that protrude downward in an arc from the lower end of the main body 154. . The lower excavation blade portion 180 for trial digging includes a lower end shaft member 160 and an accommodating cylinder member 170 attached so as to cover the lower end periphery of the lower end shaft member 160. FIG. 11 (a) shows a cross section of the lower excavation blade portion 180 for test excavation, and FIG. 11 (b) shows a state in which the lower end shaft member 160 is viewed from the side. The shaft member 160 is formed by extending two acute-angle drilling blades 162 having a sharp cross-sectional view around the blade main body portion 161 in a spiral shape in the axial direction. The accommodating cylinder member 170 is formed in a cylindrical shape as shown in FIG. 10, and includes a wave-like smooth uneven portion 172 at the lower end portion of the cylinder main body portion 171.

  For this reason, even if the accommodating cylinder member 170 comes into contact with the buried object during trial digging, damage to the buried object can be prevented by the wavy uneven portion 172 provided at the lower end of the cylinder main body 171. When the concavo-convex portion 172 comes into contact with the buried object, the entire trial earth auger 43 is moved up and down by the rotation, so that the operator can notice that the buried object is contacted via the operation handle 70. Moreover, even if the lower end part of the main body part 154 constituting the upper excavation blade part 150 for trial digging comes into contact with the buried object, damage to the buried object can be prevented by the main body part 154 and the protruding excavation blade 155 protruding in an arc shape. it can. When the projecting excavation blade 155 contacts the buried object, the entire test excavation earth auger 43 is moved up and down by the rotation, so that the operator can notice that it has contacted the buried object via the operation handle 70.

  FIG. 12 shows a combination pattern of a test excavation upper excavation blade portion, a housing cylinder member, and a test excavation lower excavation blade portion / lower end shaft member that are attached to the lower end of the auger main body 44 during trial excavation. The pattern 1 shown here corresponds to the combination shown in the first and second embodiments, and the pattern 2 corresponds to the combination shown in FIG. As shown in FIG. 11, the acute angle excavation blade 162 of the lower end shaft member 160 easily damages the embedded object, and the blade itself is also easily damaged. Therefore, the acute angle excavation blade 162 prevents damage to the embedded object and the acute angle excavation blade 162 itself. For protection, the lower end shaft member 160 is preferably used in combination with the housing cylinder member 170 (pattern 3). Further, since the lower excavation blade portion 90 for trial digging has a shape that can prevent damage to the buried object even if it comes into contact with the buried object, the lower excavation blade member 90 alone is not combined with the accommodating cylinder member 170. (Pattern 5), on the other hand, it may be used in combination with the accommodating cylinder member 170 (patterns 4 and 6).

  FIG. 13 shows a modified example of the ground excavation ground auger apparatus. The ground excavation ground auger apparatus 240 according to the modified example will be described below with reference to FIG. In addition, the same number is attached | subjected to the same member as the earth auger apparatus 40 for trial digging, and description here is abbreviate | omitted.

  The trial auging earth auger device 240 shown in FIG. 13 includes a trial mining prismatic shaft 41, a trial mining earth auger 243, a bearing support member 250, a vibration device 60, and an operation handle 270. The ground auger 243 for test digging is configured to have an auger main body 244. The auger main body 244 is narrower than the auger main body 44 in the vertical distance between the pair of flanges 46 and is vertically moved by that amount. A long auger screw 49 is provided. The bearing support member 250 has a vertical dimension corresponding to the handle attachment portion 54 and is configured by attaching the bearing member 53 to the upper and lower ends. The operation handle 270 has an engaging portion 72 attached to the distal end side, a distal end side member 271 having an insertion portion 273 formed on the proximal end side, and a clamping portion 281 that sandwiches the insertion portion 273 on the distal end side. In addition, the base end side member 280 is provided with a handle portion 283 made of vibration-proof rubber capable of absorbing vibration on the base end side.

  The distal end side member 271 and the proximal end side member 280 are coupled by inserting the coupling pin 290 in a state where the insertion portion 273 is sandwiched between the sandwiching portions 281. A plurality of insertion holes 282 through which the connecting pins 290 are inserted are formed in the holding portion 281 so as to be lined up and down. Therefore, if the connecting pin 290 is pulled out and the proximal end member 280 is slid up and down with respect to the distal end side member 271, and the connecting pin 290 is inserted through the insertion hole 282 in this state, the posture is easy to work. Prospecting work can be performed. Moreover, since the handle part 283 which an operator grips is formed with the vibration-proof rubber, it can suppress that an unnecessary vibration is transmitted to an operator.

  FIG. 14 shows still another modified example of the ground excavation ground auger apparatus. The ground excavation ground auger apparatus 340 according to the modified example will be described below with reference to FIG. In addition, the same number is attached | subjected to the member same as the earth auger apparatuses 40 and 240 for trial digging, and description here is abbreviate | omitted.

  14 is composed of a prismatic shaft 301 (see also FIG. 15) that is formed in a substantially square shape in cross section and extends vertically, and a trialing earth auger 343 that is attached to the prismatic shaft 301. . The ground excavation ground auger 343 includes an auger body portion 344 into which the prismatic shaft 301 is inserted vertically, an upper excavation blade portion 80 attached to the lower end of the auger body portion 344, and an upper excavation blade portion 80 for trial excavation. It is comprised from the lower excavation blade part 90 for trial excavation attached to the lower end part.

  The auger body 344 extends vertically and has a shaft portion 345 having an insertion space 346 (see FIG. 15) into which the prismatic shaft 301 is inserted, and a shaft support attached to the upper portion of the shaft portion 345. Device 310, slide lock device 330 attached to shaft portion 345 below shaft support device 310, bearing support member 250 attached to shaft portion 345 below slide lock device 330, and attached to bearing support member 250 And the auger screw 49 attached to the shaft portion 345 below the bearing support member 250.

  FIG. 15 shows a cross section of the XV-XV portion in FIG. 14, and as can be seen from FIG. 15, the shaft support device 310 has a support member side insertion space 320 communicating with the insertion space 346 therein. A base portion 321 formed in a ring shape and attached to the upper portion of the shaft portion 345 and four rotating roller devices 311 provided side by side in the circumferential direction of the base portion 321 are configured.

  The base portion 321 includes four support member arrangement spaces 322 extending in a direction orthogonal to the surface of the prismatic shaft 301 (hereinafter referred to as an orthogonal direction). Each of the rotating roller devices 311 has a substantially U-shape in cross-sectional view and is disposed so as to be slidable in the orthogonal direction in the support member disposition space 322, and the roller support member 312 is supported on the inner side of the roller support member 312. A support shaft 313 that extends in a direction orthogonal to the sliding direction of the member 312, a roller 314 that is rotatably supported by the support shaft 313 and disposed inside the roller support member 312, and a screw on the outer peripheral portion. A screw member 315 formed and attached to the outer side in the orthogonal direction of the roller support member 312 and extending outward in the orthogonal direction; a lid member 316 that inserts the screw member 315 in the orthogonal direction and covers the roller support member 312 from the outside; , A plurality of rollers supported between the roller support member 312 and the lid member 316 and elastically deformable in the axial direction (orthogonal direction). A disc spring 317, a nut (double nut) 318a screwed into the screw member 315 outside the lid member 316, and a washer 318b disposed between the nut 318a and the lid member 316 through the screw member 315. And is configured. Note that FIG. 16 shows a cross section of the XVI-XVI portion in FIG. 15, and as can be seen from this figure, the rotating roller device 311 includes a pair of upper and lower rollers 314 and 314.

  The roller support member 312 is inserted into the support member arrangement space 322 from the outside in the orthogonal direction in a state where the roller 314 is rotatably supported around the support shaft 313. After a plurality of disc springs 317 are inserted through screw members 315 extending outward from the roller support member 312, the lid member 316 is attached to the base portion 321 from the outside. Then, the lid member 316 is fixed to the base portion 321 by the set bolt 319. In this state, the washer 318b is inserted into the screw member 315 protruding to the outside of the lid member 316 and the nut 318a is screwed to hold the roller support member 312 elastically pressed against the disc spring 317. . At this time, the position in the orthogonal direction of the roller support member 312 (roller 314) can be adjusted by adjusting the screwing position of the nut 318a with respect to the screw member 315. In this test excavation earth auger device 340, the screwing position of the nut 318a is adjusted so that the roller 314 protrudes into the support member-side insertion space 320 without the prismatic shaft 301 being inserted. .

  The slide lock device 330 engages with a plurality of lock holes formed on the prismatic shaft 301 so as to be vertically aligned, and regulates the sliding movement of the ground excavation earth auger 343 with respect to the prismatic shaft 301 up and down. And a compression spring that presses the pin against the prismatic shaft 301.

  As shown in FIG. 14, the operation unit 380 includes a connection member 360 that is detachably attached to the bearing support member 250, and an operation handle 370 that is detachably attached to the connection member 360. The connection member 360 is formed in a rod shape, and one end of the connection member 360 is detachably attached to the bearing support member 250, and the other end includes a connection member side attachment portion 361 that engages with a handle side attachment portion 373 of an operation handle 370 described later. Configured. The operation handle 370 is formed in a substantially L-shape, and includes a base portion 371 in which a plurality of handle-side attachment portions 373 are arranged vertically and a handle portion 372 attached to an end portion of the base portion 371. Configured. For example, when digging to a shallow position, the handle portion 372 is positioned on the lower side as shown by a solid line, while when digging to a deep position, the handle portion 372 is positioned on the upper side as shown by a two-dot chain line. If the handle-side attachment portion 373 is engaged with the connection member-side attachment portion 361, the handle portion 372 can be positioned at a height where it can be easily operated.

  The configuration of the earth auger device 340 has been described above. Next, the operation of the earth auger device 340 when performing the test digging will be described with reference to FIG. 18 schematically showing the structure shown in FIG. The earth auger device 340 is characterized by the shaft support device 310 in particular, and the operation of the shaft support device 310 will be mainly described below.

  Between the prismatic shaft 301 and the support member side insertion space 320 (insertion space 346), a clearance range for sliding the ground excavation earth auger 343 relative to the prismatic shaft 301 is provided. Therefore, when the auger motor 21 is stopped and the prismatic shaft 301 is not rotationally driven, the roller 314 protruding into the support member side insertion space 320 is elastically applied to the prismatic shaft 301 as shown in FIG. While abutting, a part of the prismatic shaft 301 abuts on the inner peripheral surface of the support member side insertion space 320. FIG. 15 shows a cross section in which the clearance is emphasized.

  At the time of trial digging, as shown in FIG. 18B, while rotating the prismatic shaft 301 in the direction of the arrow R, the operator operates the handle portion 372 to adjust the force for pressing the trial auger 343 against the ground. Drilling is performed. At this time, the excavation resistance corresponding to the force pressing the trial excavation earth auger 343 against the ground acts on the exploration earth auger 343. Due to the excavation resistance, the roller support member 312, the support shaft 313, the roller 314, the screw member 315, and the nut 318 a are integrally slid and moved outward in the orthogonal direction against the elastic force of the disc spring 317. As a result, the rotationally driven prismatic shaft 301 is brought into contact with the roller 314 without being brought into contact with the inner peripheral surfaces of the shaft portion 345 and the base portion 321, and the rotational driving force of the prismatic shaft 301 is experimentally excavated through this roller 314. Is transmitted to the earth auger 343 (see also FIG. 17A). Therefore, by utilizing the rotation of the roller 314, the ground excavation earth auger 343 can be easily pushed downward against the prismatic shaft 301 and pressed against the ground.

  By the way, when excavation resistance exceeding a predetermined excavation resistance acts on the test excavation earth auger 343 at the time of the excavation, if the rotational driving force of the prismatic shaft 301 is transmitted to the test excavation earth auger 343 via the roller 314, the support shaft 313 and the like. An excessive force may be applied to the support shaft 313 and the like. Therefore, when excavation resistance exceeding a predetermined excavation resistance acts, as shown in FIG. 18C, the roller 314 and the like are further slid outwardly in the orthogonal direction according to the excavation resistance, and the support shaft 313 is moved. It is designed to prevent such damage. The operation of the rotating roller device 311 in this case will be described with reference to FIG. 17 schematically showing the rotating roller device 311.

  When the roller 314 elastically abuts on the prismatic shaft 301 and the rotational driving force of the prismatic shaft 301 is transmitted via the roller 314 as shown in FIG. The state when acting on the earth auger 343 is shown in FIG. When a digging resistance exceeding a predetermined digging resistance is applied, as shown in FIG. 17B, the roller support member 312, the support shaft 313, the roller 314, the screw member 315, and the nut 318 a are integrated according to the digging resistance. Thus, it is slid and moved outward in the orthogonal direction against the elastic force of the disc spring 317. Accordingly, the facing distance between the roller support member 312 and the lid member 316 is narrowed, and a gap is generated between the nut 318a and the washer 318b.

  As a result, as shown in FIG. 18 (c), the roller 314 is retracted from the support member side insertion space 320, and the angularly driven shaft 301 is also in contact with the inner peripheral surfaces of the shaft portion 345 and the base portion 321. Is done. For this reason, since the rotational driving force of the prismatic shaft 301 is transmitted to the ground excavation ground auger 343 via the shaft portion 345 and the base portion 321, the shaft support device 310 ( The support shaft 313 or the like) is not damaged.

  In addition, when the ground excavation ground auger 343 is pushed downward by the vertical distance of the lock hole formed in the prismatic shaft 301, the lock pin of the slide lock device 330 is engaged with the lock hole, and the ground excavation ground auger 343 is moved further. Extruding downward is restricted. For this reason, for example, in the case where trial drilling is carried out in three increments of about 0.5 m, if the lock holes are formed at intervals of about 0.5 m, it is automatically performed when one trial (about 0.5 m) is drilled. Since the extrusion of the ground auger 343 for trial digging is regulated, the management of the extrusion amount is not required, and the trial digging work is simplified. In addition, since the earth auger device 340 for trial digging includes the auger screw 49 having a vertical length corresponding to the main digging, the main digging work can be performed as it is after the trial digging is completed.

  By the way, when a trial digging operation is performed using a trial digging earth auger device 40, 240, or 340 (hereinafter simply referred to as "trial digging earth auger device 40"), the trial digging earth auger 43, 243, or 343 (as described above) is used. (Hereinafter simply referred to as “trial earth auger 43 for trial digging”) If the operator performs trial digging while appropriately adjusting the force for pressing the ground, the buried object can be prevented from being damaged. There is a risk of damage. Therefore, the excavation building column 1 according to the present invention depends on the sense of the operator M by detecting the driving state of the ground excavation earth auger 43 and restricting the operation of the auger motor 21 based on the detection result. And an operation control device for preventing damage to the buried object. Hereinafter, the operation control devices 400, 500, 600 and 700 as an example of the operation control device will be described.

  In the following description, the grounding auger device 40 for trial digging is constituted by the prismatic shaft 41 for trial digging, the grounding auger 43 for trial digging, the tubular member 50, and the vibration device 60 without mounting the operation handle 70. A case will be described in which trial digging is performed by bringing the trial digging earth auger 43 into contact with the ground by the weight of the trial digging earth auger 43, the cylindrical member 50, and the vibration device 60. In addition, since buried objects such as water pipes and gas pipes are usually dug up once in the ground and buried in the ground, when digging a place where the buried object is buried in this way, the ground (buried object) In many cases, buried objects are harder than soil on top. The operation control device described below detects an embedded object based on the driving state of the grounding auger 43 for trial digging and regulates the operation of the auger motor 21 when trialing such a place.

  First, the configuration of the operation control device 400 will be described with reference to FIGS. 19 and 20. The operation control device 400 includes a first operation device 6, a mode selection switch 7, an alarm device 9, an embedded object detector 408, a controller 410, and a hydraulic pressure supply unit 468. The first operating device 6 includes a turning operation lever L1 for performing a turning operation of the turntable 11, a raising / lowering operation lever L2 for performing a raising / lowering operation of the boom 13, and an expansion / contraction operating lever for performing an expansion / contraction operation of the boom 13. L3, a winch operation lever L4 for performing the hoisting / lowering operation of the winch 16, and an auger operation lever L5 for rotating the auger motor 21.

  Each operation lever L1-L5 is arrange | positioned so that tilting operation is possible toward the front-back from a neutral position. For example, by turning the turning operation lever L1 back and forth, the turning motor SM can be driven to rotate in accordance with the operation direction and the operation amount, and the turning table 11 can be turned. Further, by tilting the hoisting operation lever L2 back and forth, the hoisting cylinder 12 can be expanded and contracted in accordance with the operation direction and the operation amount, and the boom 13 can be raised and lowered. By tilting the telescopic operation lever L3 back and forth, the telescopic cylinder SS can be expanded and contracted according to the operation direction and the operation amount, and the boom 13 can be expanded and contracted. By tilting the winch operation lever L4 back and forth, the winch motor UM can be rotationally driven in accordance with the operation direction and the operation amount, and the wire 17 can be wound up and down. By tilting the auger operation lever L5 back and forth, the auger motor 21 can be driven to rotate in accordance with the operation direction and the operation amount, and the trial auging earth auger device 40 can be rotated. The operation levers L1 to L5 are respectively provided with operation detectors S1 to S5 including limit switches. The operation detectors S1 to S5 are turned on in response to the tilting operation of the operation levers L1 to L5, and an operation signal corresponding to the on operation is transmitted to the controller. 410.

  The mode selection switch 7 is a switch for selecting and operating one of the main digging mode D suitable for performing the main digging work and the trial digging mode S suitable for performing the trial digging work. The mode selection switch 7 sends an operation signal corresponding to the selected mode to the controller 410. The alarm device 9 is configured using, for example, a speaker that emits a warning sound, a lamp that calls attention, and the like, and operates based on an operation signal sent from the controller 410.

  The controller 410 reads out the program information stored in the memory 10a and the memory 10a for storing the program information related to the operation control of the digging pillar, and based on the input operation signal and detection signal, the alarm device 9 and the hydraulic pressure And a CPU 10b that outputs and controls a command signal to the supply unit 468 and the like. When the operation information corresponding to the main excavation mode D and the operation signal corresponding to the test excavation mode S are input to the memory 10a when the operation signal corresponding to the main excavation mode D is input from the mode selection switch 7 The program information relating to the trial digging mode S, which is read out at the same time, is stored. Here, the program information relating to the main excavation mode D is program information for operating a hydraulic actuator such as the auger motor 21 in response to an operation on the first operating device 6, while the program information relating to the trial excavation mode S is in the excavation state. In response to this, it is program information for operating the alarm device 9 or regulating the operation of the auger motor 21. Specifically, as the program information related to the test excavation mode S, the alarm torque value T1 serving as a reference for operating the alarm device 9 to notify that there is a possibility of contact with the embedded object, and the embedded object is damaged. A regulation torque value T2 (> T1) serving as a reference for stopping the rotational drive of the auger motor 21 is previously stored. A configuration in which the alarm torque value T1 and the regulation torque value T2 can be variably set by a dial switch or the like is preferable. With such a configuration, an appropriate alarm torque value T1 and regulation torque value T2 corresponding to the excavation situation are set. it can.

  As shown in FIG. 20, the hydraulic supply unit 468 is a unit that controls supply and discharge of hydraulic oil supplied from the hydraulic pumps P2, P3, and P4 to a hydraulic actuator such as the auger motor 21, and includes a swing control valve V1, an undulation. The control valve V2, the expansion / contraction control valve V3, the winch control valve V4, the auger control valve V5, the auger shut-off valve 420, the undulating shut-off valve 430, the priority supply control unit 480, and the operation levers L1 to L5 are operated. The supply oil path switching valve 490 is configured. As shown in FIG. 19, the hydraulic pumps P2 and P3 are driven by the engine E by operating the power take-off mechanism PTO incorporated in the transmission TM by turning on the PTO operation lever LE. The hydraulic pump P4 is driven by an electric motor M1 that is driven and controlled by the controller 410.

  The hydraulic supply unit 468 includes a first discharge oil passage 471 connected to the discharge port of the hydraulic pump P2, a second discharge oil passage 472 connected to the discharge port of the hydraulic pump P3, and a third discharge oil passage 473 connected to the discharge port of the hydraulic pump P4. The supply oil passage 474 connecting the supply oil passage switching valve 490 and the first discharge oil passage 471, the supply oil passage 475 connecting the first discharge oil passage 471 and the undulation control valve V2, the undulation control valve V2 and the auger control valve V5. Surplus oil supply oil passage 476 connecting the supply oil passage switching valve 490 and the surplus oil supply oil passage 476, and the supply oil passage switching valve 490 and the supply oil passage 479 connecting the supply oil passage 478. Also equipped.

  A check valve 474a is provided in the supply oil passage 474, and the supply of hydraulic oil from the first discharge oil passage 471 to the supply oil passage switching valve 490 is regulated by the check valve 474a. The supply oil passage 478 is provided with a check valve 478a, and the supply of hydraulic oil from the surplus oil supply oil passage 476 to the supply oil passage switching valve 490 is regulated by the check valve 478a. Further, a pressure regulating valve 473a is provided in the third discharge oil passage 473 to which hydraulic oil from the hydraulic pump P3 and the hydraulic pump P4 is supplied, and the pressure is supplied to the third discharge oil passage 473 by the pressure regulating valve 473a. The hydraulic fluid to be adjusted is regulated to a predetermined pressure.

  The supply oil path switching valve 490 includes a first switching position 491a that connects the third discharge oil path 473 to the supply oil path 478, a second switching position 491b that connects the third discharge oil path 473 to the supply oil path 474, The third discharge oil passage 473 can be switched to a third switching position 491c connected to the supply oil passage 479. Drive solenoids 492a and 492b are provided at both ends of the supply oil path switching valve 490, and a drive signal from the controller 410 is input to these drive solenoids 492a and 492b. When the electric motor M1 is stopped and the engine E is driven, the supply oil passage switching valve 490 is switched to the first switching position 491a, and the engine E is stopped and the electric motor M1 is driven. When only the lever operation is performed, it is switched to the second switching position 491b. When the electric motor M1 is driven by stopping the engine E and a plurality of lever operations are performed simultaneously, the switching is performed to the third switching position 491c. It is done.

  The priority supply control unit 480 includes a throttle unit 480a provided in the supply oil passage 479, and a flow path opening / closing valve 480b connected to the supply oil passage 479 on the upstream side of the throttle unit 480a. The flow path opening / closing valve 480b is configured to receive the front / rear pressure of the throttle portion 480a in the supply oil passage 479, and the surplus pressure in the supply oil passage 479 is set so that the front / back pressure difference of the throttle portion 480a becomes a predetermined value. The control is performed so that the hydraulic oil is supplied to the supply oil passage 474 via the bypass oil passage 480.

  The undulation control valve V <b> 2 performs control to supply hydraulic oil supplied via the supply oil passage 475 to the undulation cylinder 12. The hoisting control valve V2 is switched to the neutral position 483n when the hoisting operation lever L2 is located at the neutral position, and when the hoisting operation lever L2 is tilted back and forth from the neutral position, the first switching position 483a, It is configured to be switched to the second switching position 483b.

  The auger control valve V5 is connected to the undulation control valve V2 via the surplus oil supply oil passage 476, and is connected to the supply oil passage switching valve 490 via the surplus oil supply oil passage 476 and the supply oil passage 478. Then, control for supplying hydraulic oil to the auger motor 21 is performed. Working oil corresponding to the operation of the supply oil path switching valve 490 and the control valves V1 to V4 is supplied to the auger control valve V5 via the surplus oil supply oil path 476 and the supply oil path 478. The auger control valve V5 is switched to the neutral position 485n when the auger operating lever L5 is located at the neutral position, and when the auger operating lever L5 is tilted from the neutral position in the forward rotation direction (direction in which the auger is bitten into the ground). The first switching position 485a is switched to the second switching position 485b when tilted in the reverse direction. The excess hydraulic oil without being supplied from the auger control valve V5 to the auger motor 21 is returned to the oil tank via the return oil passage 477.

  An auger shut-off valve is connected to an oil passage connecting the auger control valve V5 and the auger motor 21 (at the time of forward rotation, that is, an oil passage 21a that becomes the supply side when rotating in the excavating direction and an oil passage 21b that becomes the discharge side at the time of forward rotation). 420 is provided. The auger shut-off valve 420 includes a check valve 421 and is configured to be switchable between a blocking position 422a that blocks the oil passage 21a and the oil passage 21b and a communication position 422b that allows the oil passages 21a and 21b to communicate with each other. A drive solenoid 423 is provided at the end of the auger shut-off valve 420 on the communication position 422 b side, and a drive signal from the controller 410 is input to the drive solenoid 423.

  A relief shutoff valve 430 is provided between the first discharge oil passage 471 and the return oil passage 477. The hoisting shut-off valve 430 can be switched between a blocking position 430a that blocks the first discharge oil path 471 and the return oil path 477 and a communication position 430b that allows the first discharge oil path 471 and the return oil path 477 to communicate with each other. Composed. A drive solenoid 431 is provided at the end of the undulating shutoff valve 430 on the side of the communication position 430 b, and a drive signal from the controller 410 is input to the drive solenoid 431.

  The buried object detector 408 is a differential pressure detector that detects the differential pressure between the hydraulic pressure on the input side and the hydraulic pressure on the discharge side in the auger motor 21, that is, the differential pressure between the hydraulic oil between the oil passage 21a and the oil passage 21b. The detection signal corresponding to this differential pressure is sent to the controller 410.

  Next, the operation of the operation control apparatus 400 configured as described above will be described with reference to FIG. Note that the operation of the operation control device 400 described here assumes a case where trial digging is performed by bringing the ground auger 43 for trial digging into contact with the ground by its own weight, but if necessary, the operation handle 70 (270, 370). May be attached to apply additional pressing force by the operator M, or the vibration device 60 may be operated.

  First, in the state where the grounding auger 43 for trial digging is positioned on the top of the prismatic shaft 41 for trial digging, the grounding auger 43 for trial digging is positioned so that the grounding auger 43 for trial digging can slide downward. 43, the grounding auger 43 for trial digging is brought into contact with the ground by the dead weight of the tubular member 50 and the vibration device 60. That is, the ground auger 43 for trial digging is brought into contact with the ground in a state in which it can slide in the axial direction (vertical direction) with respect to the prism column 41 for trial digging.

  Then, the mode selection switch 7 is operated to select the trial digging mode S, the auger operation lever L5 of the first operating device 6 is operated, the auger motor 21 is rotated forward, and the trial digging is started. The CPU 10b of the controller 410 reads program information (alarm torque value T1 and regulation torque value T2) related to the trial mode S from the memory 10a based on the operation signal corresponding to the trial mode S sent from the mode selection switch 7. . The CPU 10b detects the drive torque value T of the auger motor 21 based on the detection signal sent from the embedded object detector 408, and the alarm torque value T1 and the regulation torque value T2 obtained by reading this drive torque value T from the memory 10a. Compare with

  As a result of the comparison, when it is determined that the drive torque value T <alarm torque value T1 (the state up to time t1 in FIG. 21), control is performed so that the drive signal is not input to the drive solenoid 423, and thereby the auger shutoff valve 420 is shut off. It is held at position 422a. As a result, the hydraulic oil supplied to the oil passage 21a from the auger control valve V5 is supplied to the auger motor 21 to rotate the auger motor 21, and then returned to the auger motor 21 via the oil passage 21b. The auger 43 is rotationally driven according to the operation of the auger operation lever L5. Since the excavation resistance is small and the auger motor 21 is driven with a relatively small torque while the trial excavation earth auger 43 is in contact with the buried object, the auger motor 21 is driven with a relatively small torque, so that it is determined that the drive torque value T <alarm torque value T1. In response to the operation of the auger operation lever L5, the ground auger 43 for trial digging is rotationally driven.

  As a result of the comparison, when it is determined that the alarm torque value T1 ≦ the drive torque value T <the restriction torque value T2 (time t1 to t2 in FIG. 21), control is performed so that the drive signal is not input to the drive solenoid 423, and the alarm device An operation signal is output to 9 to activate the alarm device 9. Thereby, it is notified that there is a possibility that the earth digging ground auger 43 may be in contact with the buried object in the state where the earth digging earth auger 43 is rotationally driven in accordance with the operation of the auger operation lever L5. At this time, there is a possibility that an object other than the buried object is in contact with an object (for example, a rock) that is harder than the ground.

  As a result of the comparison, when it is determined that the drive torque value T ≧ the regulated torque value T2 (the state at time t2 in FIG. 21), control is performed to input a drive signal to the drive solenoid 423, whereby the auger shut-off valve 420 is connected to the communication position. It is switched to 422a. Thus, the oil passage 21a and the oil passage 21b are communicated with each other via the auger shut-off valve 420, and the hydraulic oil supplied to the oil passage 21a is not input to the auger motor 21, and the auger shut-off valve 420 and the oil passage are connected. The rotation of the auger motor 21 is stopped by returning to the auger control valve V5 through 21b. When the test excavation earth auger 43 comes into contact with the buried object, the excavation resistance increases and the drive torque of the auger motor 21 also increases accordingly. Therefore, it is determined that the drive torque value T ≧ regulator torque value T2, and the operation of the auger operation lever L5 is involved. First, the rotation drive of the auger motor 21 is stopped. Thus, when the ground auger 43 for trial digging contacts the buried object during trial digging, the rotation drive of the auger motor 21 is automatically stopped, so that damage to the buried object can be reliably prevented.

  In the above-described operation control device 400, after the rotation drive of the auger motor 21 is stopped at time t2 in FIG. 21, the operation signal (the operation position at which the rotation drive of the auger motor 21 is stopped) corresponding to the neutral position of the auger operation lever L5 ( Until the operation signal corresponding to the off operation from the operation detector S5 is detected, the rotation of the auger motor 21 is stopped. For this reason, in order to resume the rotational drive of the auger motor 21, it is necessary to return the auger operation lever L5 to the neutral position once, which can alert the operator. At this time, if the alarm device 9 is activated, it is possible to reliably call attention.

  In the above-described operation control device 400, the operation detectors S1 to S5 are configured by potentiometers instead of the limit switches so that the tilt operation direction and the tilt operation amount of the operation levers L1 to L5 can be detected. A configuration in which the alarm torque value T1 and the regulation torque value T2 are variably set according to the tilting operation amount of the lever L5 is preferable. For example, when testing a relatively hard ground, since the excavation resistance increases, generally, the operation amount of the auger operation lever L5 is increased so that the rotation speed of the auger motor 21 is set to be high, and the test excavation is performed. Is called. At this time, a relatively high drive torque T is calculated according to the excavation resistance, but if the alarm torque value T1 and the regulation torque value T2 are set high in accordance with the operation amount of the auger operation lever L5, It is possible to prevent a situation in which the rotational drive of the auger motor 21 is automatically regulated even though it is not in contact with the embedded object. That is, if comprised in this way, the appropriate control torque value T2 according to the hardness of the ground can be set, and the ground can be dug reliably.

  In the above-described operation control device 400, the auger control valve V5 is configured using an electromagnetic proportional valve instead of the mechanical control valve, and after the rotation drive of the auger motor 21 is stopped at time t2 in FIG. It is preferable that when the auger motor 21 is rotationally driven again in the forward rotation direction by operating L5, the auger motor 21 is rotationally driven in the reverse rotation direction and then rotated in the forward rotation direction. If comprised in this way, since the drive torque which acts on the earth auger 43 for trial digging can be cancelled | released, when this operation is repeated and the waveform of the same drive torque T is detected, it will judge that it is contacting the buried object. be able to. When comparing the waveforms of the drive torque T, for example, the comparison can be made based on the amount of change in the drive torque T per unit time.

  In the above-described operation control device 400, the auger control valve V5 is configured by using an electromagnetic proportional valve instead of the mechanical control valve, and after the rotation drive of the auger motor 21 is stopped at time t2 in FIG. When the auger motor 21 is rotationally driven based on the operation to L5, a configuration in which the auger motor 21 is rotationally driven at a rotational speed slower than the rotational speed corresponding to the tilting operation amount of the auger operation lever L5 is preferable. If comprised in this way, when the earth auger 43 for trial digging is rotationally driven in the state which contacted the embedded object, the impact which acts on an embedded object will be reduced and damage to an embedded object can be prevented.

  In the operation control device 400 described above, when the electric motor M1 is driven and hydraulic oil is supplied from the hydraulic pump P4, the drive torque T may be calculated based on the power consumption (current consumption) in the electric motor M1. Is possible. It is also possible to calculate the drive torque T based on the command signal (input power) to the electric motor M1 and the rotational speed. In the configuration in which an electric motor for driving an auger is mounted instead of the hydraulic auger motor 21 and the grounding auger 43 for trial digging is driven by this electric motor, the electric motor for driving the auger so that the output torque is constant. When the rotational speed of the electric motor for driving the auger drops below a predetermined rotational speed, the rotational drive of the electric motor is stopped as it is in contact with the embedded object.

  In the above-described operation control device 400, when the ground excavation earth auger 43 comes into contact with the buried object, the drive torque T increases rapidly, so the alarm device 9 is activated based on the amount of change in the drive torque T per unit time. It is also possible to prevent the buried object from being damaged by stopping the rotation drive of the ground auger 43 for trial digging. Specifically, the amount of change T3 of the driving torque per unit time for detecting that the ground auger 43 for trial digging is in contact with the buried object is stored as program information related to the trial digging mode S. In this configuration, the change amount per unit time of the drive torque T is compared with the change amount T3, and when it is determined that the change amount per unit time of the drive torque T has reached the change amount T3 (time in FIG. 22). t3) The alarm device 9 is activated, or the rotation drive of the auger motor 21 is stopped, or the alarm device 9 is activated and the rotation drive of the auger motor 21 is stopped. FIG. 22 shows a state in which the detected driving torque T is gradually increasing due to the fact that the trial excavation work progresses with time and the torque for earth removal increases.

  Heretofore, the configuration including the operation control device 400 has been described as the digging column car 1 that can prevent damage to the embedded object without depending on the operator's sense. Next, the configuration of another operation control device 500 will be described with reference to FIGS. 19 and 20. In addition, the same number is attached | subjected to the same member as the action | operation control apparatus 400 mentioned above, and the description about it is abbreviate | omitted.

  The operation control device 500 includes a first operating device 6, a mode selection switch 7, an alarm device 9, an embedded object detector 508, a controller 510, and a hydraulic pressure supply unit 468. The buried object detector 508 is for detecting a sliding position (stroke) in the axial direction with respect to the prismatic shaft of the ground excavation earth auger 43 slidably mounted in the axial direction with respect to the prismatic shaft. The non-contact type sensor is used. The embedded object detector 508 detects the slide position and sends a detection signal corresponding to the slide position to the controller 510.

  In the memory 10a of the controller 510, program information related to the main excavation mode D and program information related to the trial excavation mode S are stored. The program information regarding the main excavation mode D is the same as that of the controller 410. As program information related to the trial digging mode S, a predetermined time t0 for detecting that the trial digging earth auger 43 is in contact with the buried object is based on the amount of change in the axial slide position of the trial digging earth auger 43. It is remembered.

  Next, the operation of the operation control apparatus 500 configured as described above will be described focusing on the operation at the time of trial digging with additional reference to FIG.

  When performing the trial digging, first, the first operating device 6 is operated to bring the trial digging earth auger 43 into contact with the ground substantially perpendicularly. At this time, the mode selection switch 7 is operated to select the trial digging mode S, the auger operation lever L5 of the first operating device 6 is operated, the auger motor 21 is rotated forward, and trial digging is started. The CPU 10b of the controller 510 reads program information (predetermined time t0) related to the trial mode S from the memory 10a based on the operation signal corresponding to the trial mode S sent from the mode selection switch 7. Then, the CPU 10b detects the slide position of the ground excavation ground auger 43 based on the detection signal sent from the embedded object detector 508 (the position at the start of the trial excavation is zero, and the slide position relative to this position), and The slide movement amount per unit time is detected from this slide position.

  While the test excavation earth auger 43 is in contact with the buried object (the state up to time t4 in FIG. 23), the test excavation earth auger 43 slides downward with respect to the prismatic shaft and the ground. Therefore, a positive slide movement amount is detected. When the CPU 10b determines that a positive slide movement amount is detected, the CPU 10b performs control not to input a drive signal to the drive solenoid 423, whereby the auger shut-off valve 420 is held at the blocking position 422a. As a result, the hydraulic oil supplied to the oil passage 21a from the auger control valve V5 is supplied to the auger motor 21 to rotate the auger motor 21, and then returned to the auger motor 21 via the oil passage 21b. The auger 43 is rotationally driven according to the operation of the auger operation lever L5.

  However, since the excavation resistance increases when the test excavation earth auger 43 comes into contact with the buried object, the test excavation earth auger 43 is difficult to slide downward, and substantially the same slide position is continuously detected (see FIG. 23). Time t4 to t5). In this state, the amount of slide movement per unit time is substantially zero, and the CPU 10b measures the duration of the state in which the amount of slide movement per unit time is substantially zero, and compares this with the predetermined time t0 read from the memory 10a. To do. When it is determined that the measured duration has reached the predetermined time t0 (time t5 in FIG. 23), control is performed to input a drive signal to the drive solenoid 423, whereby the auger shutoff valve 420 is moved to the communication position 422a. Can be switched. Thus, the oil passage 21a and the oil passage 21b are communicated with each other via the auger shut-off valve 420, and the hydraulic oil supplied to the oil passage 21a is not input to the auger motor 21, and the auger shut-off valve 420 and the oil passage are connected. The rotation of the auger motor 21 is stopped by returning to the auger control valve V5 through 21b. Thus, when the ground auger 43 for trial digging contacts the buried object during trial digging, the rotation drive of the auger motor 21 is automatically stopped, so that damage to the buried object can be prevented. At this time, if the rotation drive of the auger motor 21 is stopped and the alarm device 9 is operated, the operator can recognize that the auger motor 21 has stopped due to the occurrence of an abnormal state.

  In the above-described operation control device 500, the memory 10a of the controller 510 may be configured to store, as program information related to the trial digging mode S, the digging hole depth S0 to be excavated by trial digging in addition to the predetermined time t0. In this configuration, the CPU 10b receives program information (predetermined time t0 and borehole depth S0) related to the trial mode S from the memory 10a based on the operation signal corresponding to the trial mode S sent from the mode selection switch 7. read out. Then, the CPU 10b compares the slide position of the ground excavation earth auger 43 with the read borehole depth S0 and determines that the slide position has reached the borehole depth S0 (time t6 in FIG. 23). Stop rotation drive. This makes it possible to easily and accurately excavate a test hole having a required depth.

  In the above-described operation control device 500, when it is determined that the duration of the state in which the slide movement amount is substantially zero has reached the predetermined time t0 (time t5 in FIG. 23), the control is performed to stop the rotation drive of the auger motor 21. Then, the alarm device 9 may be activated.

  Heretofore, the configuration provided with the operation control device 500 has been described as the excavated pillar car 1 that can prevent damage to the embedded object without depending on the operator's sense. Next, the configuration of another operation control apparatus 600 will be described with reference to FIGS. 19 and 20. In addition, the same number is attached | subjected to the same member as the action | operation control apparatus 400 mentioned above, and the description about it is abbreviate | omitted.

  The operation control device 600 includes a first operating device 6, a mode selection switch 7, an alarm device 9, an embedded object detector 608, a controller 610, and a hydraulic pressure supply unit 468. The buried object detector 608 is a vibrometer that is attached to the ground excavation ground auger 43 and detects the amplitude generated in the ground excavation ground auger 43. The buried object detector 608 detects the amplitude generated in the ground excavation earth auger 43 and sends a detection signal corresponding to the amplitude to the controller 610.

  In the memory 10a of the controller 610, program information relating to the main excavation mode D and program information relating to the trial excavation mode S are stored. The program information regarding the main excavation mode D is the same as that of the controller 410. As program information related to the trial digging mode S, a vibration upper limit value VU and a vibration lower limit value VL for detecting that the trial digging earth auger 43 has contacted the buried object are stored. When the ground auger 43 for trial digging comes into contact with an embedded object, usually, a larger amplitude is generated than when excavating the ground due to an impact at the time of contact. In addition, the excavation resistance is received by contact with the buried object, and the driving torque of the ground excavation ground auger 43 may be insufficient to reduce or stop the rotation. At this time, the amplitude is excavating the ground. It becomes smaller than the time or almost disappears. In order to detect such a phenomenon, a vibration upper limit value VU and a vibration lower limit value VL are stored. Note that a configuration in which the vibration upper limit value VU and the vibration lower limit value VL can be variably set with a dial switch or the like is preferable. With such a configuration, an appropriate vibration upper limit value VU and vibration lower limit value VL corresponding to the excavation situation are set. it can.

  Next, the operation of the operation control apparatus 600 configured as described above will be described with reference to FIG.

  When performing the trial digging, first, the first operating device 6 is operated to bring the trial digging earth auger 43 into contact with the ground substantially perpendicularly. At this time, the mode selection switch 7 is operated to select the trial digging mode S, the auger operation lever L5 of the first operating device 6 is operated, the auger motor 21 is rotated forward, and trial digging is started. The CPU 10b of the controller 610 reads out program information (vibration upper limit value VU and vibration lower limit value VL) relating to the trial mode S from the memory 10a based on the operation signal corresponding to the trial mode S sent from the mode selection switch 7. . Then, the CPU 10b detects the amplitude V of the ground excavation ground auger 43 based on the detection signal sent from the buried object detector 608, and compares this amplitude V with the vibration upper limit value VU and the vibration lower limit value VL.

  As a result of the comparison, if it is determined that the vibration lower limit value VL ≦ amplitude V ≦ vibration upper limit value VU (the state up to time t7 in FIG. 24), control is performed so that the drive signal is not input to the drive solenoid 423, thereby auger shut-off valve 420 is held at the blocking position 422a. As a result, the hydraulic oil supplied to the oil passage 21a from the auger control valve V5 is supplied to the auger motor 21 to rotate the auger motor 21, and then returned to the auger motor 21 via the oil passage 21b. The auger 43 is rotationally driven according to the operation of the auger operation lever L5. Since the trial auger 43 is pressed against the ground by its own weight and stable while the trial digging auger 43 is in contact with the buried object that is harder than the excavated ground, the vibration lower limit value VL It is determined that ≦ amplitude V ≦ vibration upper limit value VU, and the ground excavation ground auger 43 is rotationally driven according to the operation of the auger operation lever L5.

  As a result of the comparison, it is determined that the vibration lower limit value VL> the amplitude V (when the amplitude V decreases when contacting the embedded object), or the amplitude V> the vibration upper limit value VU (when the amplitude V increases when contacting the embedded object). In such a case (the state at time t7 in FIG. 24), control is performed to input a drive signal to the drive solenoid 423, whereby the auger shut-off valve 420 is switched to the communication position 422a. Thus, the oil passage 21a and the oil passage 21b are communicated with each other via the auger shut-off valve 420, and the hydraulic oil supplied to the oil passage 21a is not input to the auger motor 21, and the auger shut-off valve 420 and the oil passage are connected. The rotation of the auger motor 21 is stopped by returning to the auger control valve V5 through 21b. As described above, when the amplitude outside the amplitude range VL to VU detected when excavating the ground is detected, the rotational drive of the auger motor 21 is stopped regardless of the operation of the auger operation lever L5.

  Thus, when the ground auger 43 for trial digging contacts the buried object during trial digging, the rotation drive of the auger motor 21 is automatically stopped, so that damage to the buried object can be reliably prevented. At this time, if the rotation drive of the auger motor 21 is stopped and the alarm device 9 is operated, the operator can recognize that the auger motor 21 has stopped due to the occurrence of an abnormal state.

  In the above-described operation control device 600, when the prospecting earth auger 43 is rotationally driven in contact with the buried object, as shown in FIG. 25, a part of the prospecting earth auger 43 is periodically driven along with the rotational drive. A waveform in which the amplitude V greatly fluctuates in contact with the buried object may be detected at a period corresponding to the rotation of the ground excavation earth auger 43 (time t8, t9, t10). Therefore, when the waveform in which the amplitude V greatly fluctuates is detected a predetermined number of times, the embedded object can be prevented from being damaged by stopping the rotation of the auger motor 21. Note that the predetermined number of times is stored in advance in the memory 10a as program information related to the trial digging mode S. In addition, the detection of the waveform in which the amplitude V greatly varies can be performed based on, for example, the amount of change in the amplitude V per unit time.

  In the above-described operation control device 600, when the ground excavation earth auger 43 comes into contact with the buried object, the amplitude V fluctuates abruptly, and therefore, based on the amount of change in the amplitude V per unit time, It is also possible to stop the rotation drive and prevent damage to the buried object. In this configuration, the amount of change in the amplitude V per unit time is stored in advance in the memory 10a as a threshold value for detecting that the earth digging ground auger 43 has contacted the buried object in the program information related to the digging mode S. Has been.

  In the operation control device 600 described above, when the vibration device 60 is operated, the vibration provided by the vibration device 60 is also detected by the embedded object detector 608. Therefore, the frequency of vibration generated in the vibration device 60 is set to be different from the frequency of vibration generated in the test excavation earth auger 43 when excavating the ground. By doing so, it is possible to identify and remove the vibration caused by the vibration device 60 from the vibration waveform obtained by the buried object detector 608, and even when the vibration device 60 is operated by this, the ground auger 43 for trial digging is provided. It is possible to accurately detect contact with an embedded object based on the amplitude of the. Further, as program information related to the test excavation mode S, the vibration upper limit value VU and the vibration lower limit value VL that are read when the vibration device 60 is operating, the vibration upper limit value VU that is read when the vibration device 60 is stopped, and The vibration lower limit value VL may be stored separately. If the width of the vibration upper limit value VU to the vibration lower limit value VL when the vibration device 60 is operated is set larger than the width of the vibration upper limit value VU to the vibration lower limit value VL when the vibration device 60 is stopped, the vibration device 60 is in operation. It is possible to accurately detect contact with the buried object.

  Heretofore, the digging column car 1 configured with the operation control device 600 has been described. By the way, when performing a test excavation work, an operator is located near the test excavation earth auger 43 to check the excavation status, and another operator operates the first operating device 6 according to the excavation status to drive the auger motor 21. There are things to do. In this case, an operator who confirms the excavation state may feel inconvenient because he / she does not drive the auger motor 21 himself. Therefore, in addition to the first operation device 6, a second operation device 701 (see FIG. 19) configured to be electrically connectable to the controller 710 by a cable is provided, and the operator himself who confirms the excavation state can perform the second operation. It is convenient to operate the device 701 to drive the auger motor 21, and since the operation is performed by itself, it is easy to ensure safety.

  Therefore, the digging pillar car 1 is configured by mounting the operation control device 700 shown in FIGS. 19 and 20. The operation control device 700 includes a first operation device 6, a mode selection switch 7, an alarm device 9, a second operation device 701, a controller 710, and a hydraulic pressure supply unit 468. In addition, the same number is attached | subjected to the same member as the action | operation control apparatus 400 mentioned above, and the description about it is abbreviate | omitted.

  The second operating device 701 is electrically connected to the controller 710 via a cable (not shown), and is configured to be able to perform a driving operation of the electric motor M1. An operation signal corresponding to the operation to the second operation device 701 is sent from the second operation device 701 to the controller 710 via a cable, and a command signal corresponding to this operation signal is output to the electric motor M1, and the electric motor M1 is driven and controlled. In the memory 10a of the controller 710, program information related to the main excavation mode D and program information related to the trial excavation mode S are stored. The program information regarding the main excavation mode D is the same as that of the controller 410. As the program information related to the trial digging mode S, program information for restricting the operation based on the operation on the first operating device 6 when the second operating device 701 is used is stored. It should be noted that when performing the test excavation using the second operating device 701, the hydraulic oil is supplied from the hydraulic pump P4 by driving the electric motor M1 while the engine E is stopped. At this time, the auger operation lever L5 is operated, and the auger control valve V5 is held open. Therefore, when the second operating device 701 is operated to drive the electric motor M1, an amount of hydraulic oil corresponding to the rotational speed of the electric motor M1 is supplied to the auger motor 21.

  Next, with respect to the operation of the operation control device 700 configured as described above, a case where an operator located near the ground auger 43 for trial digging operates the second operating device 701 to perform trial digging will be described.

  When performing trial digging, first, the second operating device 701 is electrically connected to the controller 710 via a cable (connector). When the mode selection switch 7 is operated to select the trial mode S, the CPU 10b of the controller 710 receives an operation signal corresponding to the trial mode S sent from the mode selection switch 7 and receives the trial mode S from the memory 10a. Read program information about. For example, when the hoisting operation lever L2 of the first operating device 6 is operated and an operation signal is input from the operation detector S2, the program information related to the test excavation mode S is a drive signal to the drive solenoid 431 of the hoisting shutoff valve 430. Configured to input. Therefore, when the hoisting operation lever L2 of the first operating device 6 is operated, the hoisting shutoff valve 430 is switched to the communication position 430b, and the hydraulic oil supplied to the first discharge oil passage 471 is moved to the hoisting control valve V2. The oil is returned to the oil tank via the return oil passage 477 without being supplied to the oil tank. Therefore, even if the raising / lowering operation lever L2 of the first operating device 6 is operated, the boom 13 does not move up / down in response to the operation, so that the safety of the worker located in the vicinity of the ground excavation ground auger 43 is ensured (hereinafter referred to as the following) , Referred to as input restriction of the first operating device 6).

  In the above-described operation control device 700, as the program information related to the trial excavation mode S, a configuration is possible in which the operation speed of the hydraulic actuator based on the operation on the first operation device 6 is set to be lower than that during main excavation (hereinafter, This is referred to as input restriction of the first operating device 6). According to this configuration, even if the first operating device 6 is operated when the trial excavation mode S is selected and the trial excavation work is performed, the operating speed of the hydraulic actuator based on the operation is higher than that when the main excavation mode D is selected. Since the speed is also low, it is easy to ensure the safety of the operator who operates the second operating device 701 while checking the excavation status in the vicinity of the ground excavation ground auger 43.

  In the above-described operation control device 700, a configuration in which a trial digging region in which the tip of the boom 13 is assumed to be located at the time of the trial digging operation can be stored as program information related to the trial digging mode S. In this configuration, the turning position, expansion / contraction amount, and undulation angle of the boom 13 are input to the controller 710, and the position of the tip of the boom 13 is calculated based on these. Then, based on the operation signal from the mode selection switch 7, program information relating to the trial drilling mode S is read, and it is determined whether or not the calculated position of the tip of the boom 13 is within the trial drilling area. As a result, when it is determined that the position of the tip of the boom 13 is within the trial excavation area, the operation by the second operation device 701 is enabled while performing input restriction or input restriction of the operation by the first operation device 6 described above. .

  Further, when the position of the tip of the boom 13 is in the trial digging region and the second operating device 701 is electrically connected to the controller 710, the trial digging earth auger 43 and the manipulation handle may be mounted. If the boom 13 is stored based on the operation of the first operating device 6 as it is, there is a risk of damaging them. Therefore, in this case, it is preferable to restrict the storage of the boom 13 based on the operation of the first operating device 6.

  In the above-described embodiment, the configuration in which the rotational driving of the auger motor 21 is stopped when it is determined that the buried object has been contacted based on the driving state of the trial auger 43 has been described. It is also possible to decelerate 21 or stop the drive source (engine E or electric motor M1).

  In the above-described embodiment, the mode selection switch 7 can be provided at an arbitrary position of the excavation pillar 1, for example, can be provided in the first operating device 6 or the second operating device 701. .

  In the above-described embodiment, the detection of the driving torque T, the detection of the amount of change in the slide position, and the detection of vibration are exemplified as a method of detecting contact with the buried object based on the driving state of the ground excavation earth auger 43. A plurality of these may be combined to detect the drive state of the ground excavation ground auger 43.

  In the above-described embodiment, instead of the configuration in which the mode selection switch 7 is provided, there is also a configuration in which test drilling mode detection means (for example, a limit switch or the like) that detects that the operation handle is attached is provided in the operation handle mounting portion. Is possible. In this configuration, when the trial digging mode detecting means detects that the operating handle is attached to the trial digging earth auger device, the digging mode S is switched to. Further, the second operating device 701 may be switched to the trial mode S based on the electrical connection to the controller 710 via a cable (connector).

  In the above-described embodiment, instead of the configuration in which the mode selection switch 7 is provided, a configuration in which a human sensor that detects the presence of an operator near the ground excavation ground auger device may be provided. Since a worker normally performs an operation in the vicinity of the ground auger 43 for trial digging while checking the excavation status, when the presence of the worker is detected by the sensor, program information related to the trial mine mode S stored in the memory 10a. Is read and executed.

  In the above-described embodiment, the mechanical control valves V <b> 1 to V <b> 5 connected to the first operating device 6 have been illustrated and described, but an electromagnetic proportional valve may be used instead.

  In the above-described grounding auger device 40 for trial digging, a configuration in which a mark is provided on the trial digging prismatic shaft 41 is preferable so that the slide movement position of the grounding auger 43 for trial digging can be visually confirmed. If comprised in this way, the operator can grasp | ascertain how deep the earth auger 43 for trial digging has penetrated into the ground at a glance, and can perform trial digging work smoothly.

  In the above-described embodiment, the earth auger device configured to include the hydraulic auger motor 21 has been described as an example. However, instead of this, the earth auger device can be configured using an electric auger motor. .

  In the above-described embodiment, the excavation blade portions 80, 90, 150, 180 configured not to damage the buried object during the trial excavation have been described as examples, but the present invention is not limited to these forms. The present invention can be changed as appropriate without departing from the spirit of the present invention.

6 first operating device (first operating means)
13 Boom 21 Auger motor 40 Ground auger device for trial digging (Auger device for trial digging)
41 Trial prism shaft (shaft member)
43 Earth auger for trial digging
408 Embedded object detector (drive state detection means)
410 controller (drive control means)
701 Second operating device (second operating means)
T2 regulation torque value (predetermined drive torque)
T3 Drive torque change amount (predetermined change amount)
VL vibration lower limit (predetermined vibration amplitude range)
VU vibration upper limit (predetermined vibration amplitude range)

Claims (8)

An auger motor that hangs down and attaches to the tip of the boom that can move up and down at least;
A trial auger device driven by the auger motor;
Drive control means for controlling the operation of the auger motor to control the driving of the trial auger device;
Driving state detecting means for detecting the driving state of the auger device for trial digging,
The trial auger device includes a shaft member that is rotationally driven by the auger motor, and is slidably movable in the axial direction on the shaft member, and is integrated with the shaft member while being slidable in the axial direction. With a trial auger member that rotates and excavates the ground,
The earth auger device characterized in that the drive control means is configured to be able to control the drive of the trial auger device according to the detection result of the drive state detection means. The trial auger device includes an operation handle provided to be rotatable relative to the trial auger member ,
The auger motor rotates the trial auger member via the shaft member, and pushes the operation handle downward to apply a downward pressing force to the trial auger member to excavate the ground. The earth auger device according to claim 1, wherein the earth auger device is configured to be able to. The drive state detection means is configured to detect a drive torque of the auger motor,
The drive control means regulates the operation of the auger motor to regulate the drive of the trial auger device when the drive torque detected by the drive state detection means is equal to or higher than a predetermined drive torque. The earth auger device according to claim 1 or 2. The drive state detection means is configured to detect a drive torque of the auger motor,
The drive control means regulates the operation of the auger motor and drives the trial auger device when the change amount per unit time of the drive torque detected by the drive state detection means is a predetermined change amount or more. The earth auger device according to claim 1 or 2, wherein The drive state detection means is configured to detect a slide movement position of the auger member for trial digging in the axial direction,
The drive control means regulates the operation of the auger motor when the change amount per unit time of the slide movement position detected by the drive state detection means is equal to or less than a predetermined change amount. The earth auger device according to claim 1 or 2, wherein driving is restricted. The drive state detection means is configured to detect a vibration amplitude of the trial auger device,
The drive control means restricts the operation of the auger motor by restricting the operation of the auger motor when the vibration amplitude detected by the drive state detection means is out of a predetermined vibration amplitude range. The earth auger device according to claim 1 or 2. The drive state detection means is configured to detect a vibration amplitude of the trial auger device,
The drive control means regulates the operation of the auger motor and drives the trial auger device when the change amount per unit time of the vibration amplitude detected by the drive state detection means is equal to or greater than a predetermined change amount. The earth auger device according to claim 1 or 2, wherein The boom is provided on the vehicle body,
First operating means provided on the vehicle body and operated to drive the trial digging auger apparatus; and second operating means configured to be portable and operated to drive the trial digging auger apparatus. Prepared,
The drive control means controls to drive according to the operation of the first operation means and to drive according to the operation of the second operation means when performing control to drive the trial auger device The earth auger device according to any one of claims 1 to 7, wherein the earth auger device is configured to be capable of.

Images